CN205421121U - Blow and exhaust device - Google Patents

Abstract

The utility model relates to a blow and exhaust device, include: a housing. The tuber pipe is along longitudinal extension and connection the casing, the motor is located in the casing and provide rotary motion, the fan, the rotatory air current that produces, the fan is operationally rotatory along the first direction, blow and exhaust device is in the blowing molding formula, the fan is operationally rotatory along the second direction, blow and exhaust device is in and inhales the mode.

Description

Suction device

technical field

The utility model relates to a blowing and sucking device with both blowing and sucking functions.

Background technique

The blowing device is a common electric outdoor cleaning tool, which is mainly used for cleaning and collecting garbage such as leaves. The blowing and suction device usually has a blowing mode and a suction mode. In the blowing mode, the blowing and suction device blows out wind, which can concentrate the scattered leaves on the ground. In the suction mode, the suction device generates suction, and the collection device can suck the leaves into the collection device, thereby avoiding manual cleaning and saving manpower and time. The collection device can be a carry-on garbage bag that embodies portability, or a larger disposable trash can that can store more leaves. Therefore, the user can freely choose whether the blowing device is in the suction mode or the blowing mode according to the actual working conditions. The advantage of this is that the user only needs a blowing and suction device to complete the concentration and collection of leaves, and no other additional tools are required.

However, the traditional blowing device that can only perform blowing function does not have a suction mode. After the user uses the blowing to concentrate the leaves, he still needs to use other tools to collect the concentrated leaves into the collection device. Other tools here are vacuum cleaners, hand tools, etc. Therefore, there are many tools needed to complete the work, and the operation is more complicated. This is the place where the blowing suction device is advantageous compared with the traditional blowing device.

However, suction devices also have disadvantageous disadvantages. Since the blowing and suction device has two different functions of blowing and suction, it needs to take into account the characteristics of both, and at the same time improve the performance of blowing and suction as much as possible, so it cannot directly use the structure of the blower. In addition, the blowing and sucking device needs to frequently switch between blowing and sucking modes, so the process of mode switching must be simplified as much as possible to facilitate the use of users and improve user experience.

For example, U.S. Patent No. 4,870,714 discloses a blowing and sucking device, which has a blowing function and a sucking function. When performing the blowing function, the blowing pipe is connected at the radial position of the fan, and when performing the suction function, the suction pipe is connected at the axial position of the fan. This design has the following disadvantages: 1. First of all, the blowing pipe and the suction pipe are not the same pipe, so the user needs to be equipped with two pipes, the blowing pipe and the suction pipe, to realize the blowing and suction function. If the pipe is lost, it will cause failure. The consequences of performing a certain function, and the two pipes will inevitably take up more storage space and cost. 2. When performing blowing and suction conversion, the installed blowing pipe/suction pipe must be removed first, and then the blowing pipe/blowing pipe must be installed. That is to say, the air duct needs to be replaced when the blowing and suction mode is switched, which brings great inconvenience to the user's operation. 3. The blowing pipe and the suction pipe need to be installed in different positions on the blowing device, which causes the complexity of the overall structure. Therefore, the structure of the blowing and aspirating device must be optimized to make the structure more compact, the user's operation more convenient, and the entire blowing and aspirating device to be smaller and smaller, so as to meet the needs of users.

Utility model content

In view of this, one of the objectives of the present utility model is to provide a blowing and sucking device that is easy for users to use and has a simple structure.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a blowing and sucking device, comprising: a housing; a first opening connected to the outside world; an air duct connected to the housing and having a nozzle connected to the outside world; an airflow generating device operable to generate airflow; when the blowing device is in the blowing mode, the airflow enters the housing from the first opening and blows out from the nozzle; when the blowing device is in the In the suction mode, the airflow enters the air duct from the nozzle and is blown out from the first opening.

Preferably, there is only one air duct, and when the blowing and suction device is in the blowing mode or the suction mode, the relative position of the air duct connected to the casing remains unchanged.

Preferably, the nozzle is located at one end of the air duct, and the other end of the air duct is provided with a connection port connected to the casing.

Preferably, the air duct further includes a bent portion disposed close to the nozzle.

Preferably, the air duct has a length ranging from 500 mm to 800 mm.

Preferably, the air duct includes a detachable first section and a second section, and the first section and the second section are also provided with a fixing structure for fixed connection.

Preferably, the fixing structure includes an elastic engaging member arranged on one of the first section and the second section and a locking member arranged on the other of the first section and the second section. It is suitable for the shape matching structure of the said engaging part.

Preferably, the housing also has an interface for connecting the air pipe, and when the blowing and suction device is in the blowing mode or the suction mode, the air pipes are both connected to the interface.

Preferably, there is one and only one interface.

Preferably, the opening of the interface is opposite to that of the first opening.

Preferably, in blowing mode, air moves along a straight line from said first opening to said port, and in sucking mode, air moves along a straight line from said port to said first opening.

Preferably, the air moves in opposite directions between the first opening and the interface in the blowing mode and the suction mode.

Preferably, the interface and the first opening are located on opposite sides of the airflow generating device.

Preferably, the airflow generating device includes a fan and a motor for driving the fan to rotate, and the fan can rotate in different directions around a fan axis, thereby generating the airflow moving in different directions.

Preferably, the fan includes an axial fan, and the moving direction of the airflow generated by the axial fan is parallel to the axial direction of the fan.

Preferably, the fan includes a mixed-flow fan, and the mixed-flow fan can generate an airflow that moves along the extending direction of the fan axis.

Preferably, a fan axis of the fan extends through the first opening.

Preferably, the housing also has an interface connected to the air duct, and the axis of the fan passes through the interface.

Preferably, the first opening at least partially coincides with the projection of the nozzle on a plane perpendicular to the fan axis of the fan.

Preferably, the first opening at least partially coincides with a projection of the interface on a plane perpendicular to the axis of the fan.

Preferably, the airflow generating device includes a counter-rotating axial flow mechanism and a motor driving the counter-rotating axial flow mechanism, and the counter-rotating axial flow mechanism can be driven to generate airflows moving in different directions.

Preferably, the counter-rotating axial flow mechanism includes a first axial flow fan and a second axial flow fan arranged close to each other, and the motor simultaneously drives the first axial flow fan and the second axial flow fan in opposite directions rotate.

Preferably, the first axial fan and the second axial fan respectively include several blades, and the blades of the first axial fan and the blades of the second axial fan rotate in opposite directions.

Preferably, the rotation axis of the first axial fan coincides with the rotation axis of the second axial fan.

Preferably, the motor includes a first motor connected to the first axial fan and a second motor connected to the second axial fan, and the blowing device also includes a motor for controlling the first motor and the second motor A control mechanism, the control mechanism controls the first motor and the second motor to rotate in different directions.

Preferably, the blowing device further includes a transmission device connecting the first axial fan and the second axial fan, and the transmission device is driven by the motor to drive the first axial fan and the second axial fan. The fans rotate in reverse.

Preferably, the transmission device includes a connecting shaft connected to the motor, a first gear set and a second gear set meshingly connected to the connecting shaft in different rotation directions, the first gear set and the second gear set The first axial fan and the second axial fan are respectively connected.

Preferably, when the blowing device is in the blowing mode, the fan rotates clockwise around the fan axis; when the blowing device is in the blowing mode, the fan rotates counterclockwise around the fan axis direction rotation.

Preferably, the motor is located between the fan and the first opening such that the distance from the motor to the first opening is smaller than the distance from the fan to the first opening.

Preferably, the fan, the motor and the first opening are sequentially arranged along a straight line.

Preferably, the housing also has an interface connected to the air duct, and the interface, the fan, the motor and the first opening are sequentially arranged in a straight line.

Preferably, the blowing device further includes a pulverizing mechanism arranged between the axial flow fan and the nozzle, and the pulverizing mechanism is used to pulverize the objects sucked from the nozzle.

Preferably, the crushing mechanism is driven to rotate about a rotation axis by the motor.

Preferably, the rotation axis is coincident with the fan axis.

Preferably, said shredding mechanism comprises a cutting blade rotatable about said axis of rotation.

Preferably, the cutting blade extends longitudinally perpendicular to the axis of rotation, and includes a mounting portion located in the middle of the cutting blade, and two working portions extending longitudinally in opposite directions to the mounting portion, the working portions include A cutting part for cutting objects.

Preferably, the mounting part has a flat rectangular mounting hole.

Preferably, the two working parts are arranged symmetrically about the center of the rotation axis.

Preferably, each working portion includes an end portion located at a longitudinal end and oppositely disposed first and second sides between the end portion and the mounting portion, the cutting portion is located at the first on the side.

Preferably, the second side is bent longitudinally and transversely, so that the second side is curled relative to the first side.

Preferably, the second side is inclined relative to the first side so that the transverse length from the mounting portion to the end portion is gradually narrowed.

Preferably, the first side and the second side are arc-shaped so that the cutting blade is S-shaped.

Preferably, the crushing mechanism includes at least two cutting blades arranged at a certain distance along the extension direction of the rotation axis.

Preferably, the ratio of the projected area of the cutting blade on the cross-section of the air duct to the cross-sectional area of the air duct is less than 1/2.

Preferably, the pulverizing mechanism comprises a trimming rope made of flexible material.

Preferably, the pulverizing mechanism comprises a cutter head arranged around the axis of rotation, and a cutting blade arranged eccentrically on the cutter head.

Preferably, the pulverizing mechanism further includes blades that are selectively expandable or retractable.

Preferably, the blowing device further includes a duct for guiding the air flow through, the duct includes a guide body extending longitudinally and stator vanes distributed circumferentially relative to the guide body and accommodates the guide body and The shroud of the stator blade.

Preferably, the fan and the crushing mechanism are respectively located on opposite sides of the duct.

Preferably, the crushing mechanism, the duct and the fan are sequentially arranged along a straight line.

Preferably, the duct is located on a side of the fan away from the first opening.

Preferably, the blowing device further includes a transmission rod passing through the inside of the guiding body and axially connecting the crushing mechanism and the axial flow fan.

Preferably, the shortest distance between the pulverizing mechanism and the stationary blade is 10-20 mm.

Preferably, the stator blades are radially located between the guiding body and the shroud, and the air flow passes between the guiding body and the shroud.

Preferably, the stator blades are arranged inclined at a certain angle relative to the moving direction of the airflow.

Preferably, the angle is 5 degrees to 15 degrees.

Preferably, the number of the stator blades is 7 and distributed uniformly along the circumferential direction.

Preferably, the blowing device also has an accommodating cavity for accommodating the duct and a moving mechanism operable to move the duct. Switch between a second position located in the receiving cavity.

Preferably, a vibration damping mechanism is further provided between the shroud and the casing.

Preferably, the damping mechanism is an O-ring surrounding the wind deflector.

Preferably, the material of the damping mechanism is elastic rubber material.

Preferably, a limiting groove is provided on the periphery of the wind deflector, and the damping mechanism is located in the limiting groove.

Preferably, the housing is further provided with a limiting step for snapping into the limiting groove.

Preferably, a transmission shaft driven by the motor and a supporting bearing for supporting the transmission shaft are provided inside the wind deflector.

Preferably, the blowing device further includes a vibration damping mechanism arranged between the support bearing and the shroud.

Preferably, the damping mechanism is made of elastic material.

Preferably, the damping mechanism is a rubber cap sleeved on the support bearing.

Preferably, the damping mechanism is a rubber ring surrounding the support bearing.

Preferably, an air flow channel for the air flow to move is formed between the first opening and the nozzle, and the motor is isolated from the air flow channel.

Preferably, the motor is located in the airflow channel, and the blowing device further includes a motor cover for isolating the motor from the airflow channel.

Preferably, the air flow passes between the motor cover and the casing.

Preferably, the blowing device further includes a cooling channel for cooling the motor located in the motor cover, and the cooling channel is independently arranged relative to the air flow channel.

Preferably, the cooling channel includes an air inlet and an air outlet arranged on the housing, and the air inlet and the air outlet are both independently arranged on the first opening.

Preferably, a cooling outlet is provided on the motor cover, and the cooling outlet is aligned with the air outlet so that the cooling air directly passes through the air outlet after being discharged from the cooling outlet.

Preferably, the motor cover further includes several protruding portions protruding outward, the protruding portions abut against the air outlet on the housing, and the cooling outlet is located on the protruding portions.

Preferably, the motor cover extends in a longitudinal direction, and the protrusion extends in a radial direction perpendicular to the longitudinal direction.

Preferably, the air outlet and the cooling outlet are arranged along a circumferential direction.

Preferably, a cooling inlet is provided on the motor cover, and a guide passage is provided between the cooling inlet and the air inlet, and the guide passage is isolated from the airflow passage.

Preferably, the blowing device further includes a duct for guiding the air flow, the duct includes a guiding body extending longitudinally, stator blades distributed circumferentially relative to the guiding body, and accommodating the guiding body and the stationary vanes A shroud, the airflow passes through the inside of the shroud.

Preferably, the guide channel is formed between the wind deflector and the housing.

Preferably, the blowing device further includes a cooling fan located in the motor cover, and the cooling fan rotates to generate a cooling airflow.

Preferably, the motor cover further includes a transmission interface through which the motor shaft passes, so that the motor shaft is connected to the fan located outside the motor cover.

Preferably, the motor housing comprises two half shells which can be fixedly connected to each other.

Preferably, the motor cover is located on a side of the fan close to the first opening.

Preferably, the motor is located outside the airflow channel.

Preferably, the motor is controllable to rotate clockwise and counterclockwise around the motor shaft, and when rotating clockwise, the motor drives the fan to rotate in the first direction; when rotating counterclockwise , the motor drives the fan to rotate in the second direction.

Preferably, the blowing device further includes a control switch for controlling the rotation direction of the motor, and the control switch can selectively control the rotation of the motor in a clockwise direction or a counterclockwise direction.

Preferably, the housing has a handle for holding, and the control switch is arranged on the handle.

Preferably, the control switch has at least three operating positions. In the first operating position, the control switch controls the motor to rotate clockwise. In the second operating position, the control switch turns off the motor rotation. In the third operating position, the control switch controls the motor to rotate in a counterclockwise direction.

Preferably, the blowing device further includes a safety switch linked with the control switch, and the control switch can only rotate the motor when the safety switch is triggered.

Preferably, the housing also has an interface connected to the air pipe, and the safety switch is triggered when the air pipe is connected to the interface.

Compared with the prior art, the beneficial effect of the utility model is that the blowing and sucking device realizes the switching of the blowing and sucking mode by controlling the fan or the airflow generating device to generate airflow in different directions, thereby improving the convenience of lifting operation. In addition, the use of the same air duct in the blowing mode and the suction mode requires only one air duct to realize the function of blowing or sucking, which simplifies the structure of the entire blowing and sucking device.

One of the objectives of the present utility model is to provide a blowing and sucking device which is convenient for users to use and has a simple structure.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a blowing and sucking device, which can selectively work in the blowing mode or the sucking mode, including: a housing; The casing; an airflow generating device operable to generate an airflow, and in the blowing mode, the airflow is blown out from the air duct; in the suction mode, the airflow is sucked in from the air duct; wherein the housing An airflow channel is formed with the air duct, and the airflow moves in the airflow channel in both the blowing mode and the suction mode.

Compared with the prior art, the beneficial effect of the utility model is that the airflow of the blowing and suction device passes through the same airflow channel no matter it is in the blowing mode or in the suction mode, so there is no need for additional operation to change the airflow when switching between the blowing and suction modes aisle. It is more convenient for users to use.

One of the purposes of this utility model is to provide a method for assembling a blowing device, including the following steps: P1: assemble the airflow generating device; P2: assemble the airflow generating device into the casing; P3: connect the air pipe to the casing, Make the airflow generating device generate airflow, when the blowing device is in the blowing mode, make the airflow enter from the first opening of the housing and blow out from the mouth of the air duct; when the blowing device is in the In the suction mode, the airflow is sucked in from the nozzle of the air duct and discharged from the first opening of the casing.

Preferably, step P1 includes the following steps: S1. Assembling the first assembly, wherein step S1 includes the following steps: S11. Installing the fan on the first end of the transmission mechanism; S12. Inserting the transmission mechanism into the duct, and Make the second end of the transmission mechanism pass through the duct, and the second end is opposite to the first end; S13, install the crushing mechanism on the second end of the transmission mechanism; S2, assemble the second assembly , wherein the step S2 includes the following steps: S21, fixing the motor into one half-shell of the motor cover; S22, splicing and fixing the other half-shell of the motor cover with the half-shell of the motor cover in S21; S3, fixing the motor cover half-shell in the second assembly The motor shaft mates with the fan in the first assembly.

Preferably, step P2 includes the following steps: S4, installing the first component and the second component into one shell half shell; S5, splicing and fixing the other shell half shell with the shell half shell in S4.

Preferably, in the step S5, the half shells of the housing are fixedly connected by screws.

Preferably, the fan is mated with the first end of the transmission mechanism through a flat square structure.

Preferably, in step S11, a supporting bearing is installed on the transmission mechanism.

Preferably, said support bearing is mounted between said first and second ends of said transmission.

Preferably, in step S12, the support bearing is inserted into the duct and the support bearing abuts against a support step in the duct.

Preferably, in step S12, there are at least two supporting bearings.

Preferably, in the step S13, the pulverizing mechanism is fitted to the second end of the transmission mechanism through a flat square structure.

Preferably, in step S13, the second end is further equipped with a limit pin that limits the movement of the crushing mechanism.

Preferably, in step S21, the motor shaft of the motor at least partially passes through the half shell of the motor cover.

Preferably, in step S22, the half shells of the motor cover are fixedly connected by screws.

Preferably, in the step S3, the motor shaft is axially connected to the fan through a flat square fit.

Preferably, in step S3, the motor shaft is axially connected to the fan through spline fit.

Compared with the prior art, the beneficial effect of the utility model is that the method for assembling the blowing and sucking device is simpler and more convenient.

One of the objectives of the present utility model is to provide a blowing and sucking device for sealing and isolating the cooling channel and the air flow channel.

In order to achieve the above object, the technical solution adopted by the utility model is: a blowing and sucking device, comprising: a housing with a first opening; an air duct connected to the housing and having a second opening; a fan rotating and generating Airflow, an airflow channel for the airflow to move is formed between the first opening and the second opening; a motor is located in the housing and is used to drive the fan to rotate; wherein the blowing device also includes a housing The motor cover of the motor, the air flow channel is located outside the motor cover, the blowing device further includes a cooling channel for cooling the motor, and the cooling channel is isolated from the air flow channel.

Preferably, the motor cover includes a transmission interface through which the motor shaft passes, and the blowing device further includes a seal provided on the transmission interface, and the seal isolates the airflow passage from the cooling passage .

Preferably, the seal is a barrel-shaped structure, one end of which is connected to the transmission interface, and the opposite end is connected to a support structure supporting the motor.

Description of drawings

The purpose, technical solutions and beneficial effects of the above-mentioned utility model can be clearly obtained through the following detailed description of specific embodiments capable of realizing the utility model, combined with the description of the accompanying drawings.

The same reference numerals and symbols are used in the drawings and the specification to denote the same or equivalent elements.

Fig. 1 is an overall schematic diagram of a blowing device according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of removing the duct inside the blowing device in Fig. 1 .

Fig. 3 is a schematic diagram of a fan of the blowing and suction device in Fig. 1 .

Fig. 4 is a schematic diagram of the blowing device in Fig. 1 in blowing mode.

Fig. 5 is a schematic diagram of the blowing and suction device in Fig. 1 in a suction mode.

Fig. 6 is a schematic diagram of the air flow channel inside the blowing device in Fig. 1 .

Fig. 7 is a schematic diagram of the internal structure of the blowing device in Fig. 1 .

Fig. 8 is a cross-sectional view of the blowing device in Fig. 1 .

Fig. 9 is a rear view of the blowing device in Fig. 1 .

FIG. 10 is an exploded schematic view of the motor cover in FIG. 6 .

Fig. 11 is a schematic diagram of the crushing mechanism of the second embodiment of the present invention.

Fig. 12 is a schematic diagram of the crushing mechanism of the third embodiment of the present invention.

Fig. 13 is a schematic side view of the crushing mechanism of the fourth embodiment of the present invention.

Fig. 14 is a schematic front view of the crushing mechanism of the fourth embodiment of the present invention.

Fig. 15 is a schematic diagram showing the development of the crushing mechanism of the fifth embodiment of the present invention.

Fig. 16 is a schematic diagram of the contraction of the crushing mechanism of the fifth embodiment of the present invention.

Fig. 17 is a schematic diagram of the internal structure of the blowing device according to the second embodiment of the present invention.

Fig. 18 is a cross-sectional view of the blowing device in Fig. 17 .

Fig. 19 is a schematic diagram of duct movement of the blowing device according to the third embodiment of the present invention.

Fig. 20 is a schematic diagram of a motor and a fan arranged side by side in a blowing device according to a fourth embodiment of the present invention.

Fig. 21 is a schematic diagram of a blowing device according to a fifth embodiment of the present invention.

Fig. 22 is a schematic diagram of a blowing device according to a sixth embodiment of the present invention.

Fig. 23 is a schematic diagram of the blowing and sucking device of the seventh embodiment of the present invention in the sucking mode.

Fig. 24 is a schematic diagram of the blowing and suction device in the blowing mode of the seventh embodiment of the present invention.

Fig. 25 is a schematic diagram of the blowing device of the eighth embodiment of the present invention.

Fig. 26 is a schematic diagram of a blowing device according to a ninth embodiment of the present invention.

Fig. 27 is a schematic diagram of a blowing device according to a tenth embodiment of the present invention.

Fig. 28 is a schematic view of the blowing device of the eleventh embodiment of the present invention.

Fig. 29 is a schematic circuit diagram of the control switch of the blowing device in Fig. 1 in the first operating position.

Fig. 30 is a schematic circuit diagram of the control switch of the blowing device in Fig. 1 in the second operating position.

Fig. 31 is a schematic circuit diagram of the control switch of the blowing device in Fig. 1 in the third operating position.

Fig. 32 is a schematic diagram of the assembled fan and transmission mechanism of the present invention.

Fig. 33 is a schematic diagram of the assembly duct and transmission mechanism of the present invention.

Fig. 34 is a schematic view of the assembly crushing mechanism and transmission mechanism of the present invention.

Fig. 35 is a schematic diagram of an assembled motor and a motor cover of the present invention.

Fig. 36 is a schematic diagram of assembling the first assembly and the second assembly of the present invention.

Fig. 37 is a schematic diagram of installing the first assembly and the second assembly into the casing of the present invention.

Fig. 38 is a schematic flow chart of assembling the blowing device of the present invention.

Fig. 39 is a schematic diagram of installing a collecting device when the blowing and sucking device of the present invention is in the suction mode.

Fig. 40 is a schematic diagram of installing a collection device when the blowing device of the present invention is in the blowing mode.

Fig. 41 is a schematic diagram of a blowing device of a twelfth embodiment of the present invention.

Fig. 42 is a schematic diagram of the counter-rotating axial flow mechanism of the blowing device in Fig. 41 .

FIG. 43 is a schematic diagram of air passing through the counter-rotating axial flow mechanism in FIG. 42 .

Fig. 44 is a schematic diagram of the motor-driven counter-rotating axial flow mechanism of the blowing device in Fig. 41 .

Fig. 45 is a schematic diagram of a blowing and sucking device of a thirteenth embodiment of the present invention.

FIG. 46 is a schematic diagram of the control mechanism in FIG. 42 controlling the first motor and the second motor.

1,1', blowing device 2,2', air duct 3,3', fan

4,4', motor 5, duct 6, crushing mechanism

7. Transmission mechanism 8. Safety mechanism 9. Handle

10,10', main body 11, interface 12, first opening

13. Pivot shaft 14, housing 15, electrical interface

16. Positioning structure 17, cooling channel 18, first connection port

19. The second connecting port 21, 21', nozzle 22, connecting head

23, the first port 24, the second port 25, the connection port

26. The first connecting part 27, the second connecting part 31, the hub

32, blade 33, connecting hole 34, circumferential surface

35. Connecting end 36, free end 39, fan axis

40, stator 41, axis 42, motor shaft

43. Cooling fan 44, motor cover 45, transmission interface

46. Support structure 47, transmission part 48, raised part

49. Rotor 51, guide body 52, stator vane

53, shroud 54, fixed rib 55, air flow channel

56. Damping mechanism 57, positioning groove 58, positioning step

59. Cooperating part 60, clutch device 61, installation part

62. Working part 63, cutting part 64, mounting hole

65, positioning piece 67, end 68, side

71. Drive shaft 72, support bearing 73, damping element

74. Anti-skid structure 80, guide channel 81, trigger lever

82, trigger switch 83, trigger button 84, safety switch

91. Control switch 100, accommodating chamber 101, pins

102, pin 103, pin 104, pin

105, pin 106, pin 107, pivoting device

110, first connecting arm 120, second connecting arm 121, safety shield

130, pivot shaft 141, air inlet 142, air outlet

143. Motor housing 200, collecting device 201, collecting part

202, air intake part 203, installation part 204, operation part

205, pivot shaft 206, second mounting part 207, pocket

208, air intake hole 260, first opening 270, second opening

310, the first fan 320, the second fan 400, the accommodation cavity

401, channel 441, 441 ', cooling inlet 442, cooling outlet

443, seal 461, front bracket 462, rear bracket

463, bolt 464, support bearing 500, counter-rotating axial flow mechanism

501, motor 502, first axial flow fan 503, second axial flow fan

504, transmission device 505, connecting shaft 506, first gear set

507, the second gear set 508, the supporting device 509, the first motor

510, second motor 511, control mechanism 591, cone

592, skirt body 600, cutter head 601, blade

602, connection part 603, installation hole 604, installation shaft

605, telescopic element 681, first side 682, second side

711, first end 712, second end P, plane

L, spacing C, center

detailed description

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be defined more clearly .

FIG. 1 is an overall schematic diagram of a blowing device 1 according to an embodiment of the present invention. The suction device 1 is a common garden tool used for cleaning work. The blowing and sucking device 1 can utilize the blowing function to gather the scattered leaves, and can also utilize the suction function to suck the leaves into a designated garbage collection device, so as to achieve the purpose of cleaning. The blowing device 1 therefore has at least two operating modes. When the blowing device 1 is in the first working mode, the blowing device 1 performs a blowing function, and when the blowing device 1 is in the second working mode, the blowing device 1 performs a suction function. Therefore, the first working mode can also be called blowing mode, and the second working mode can also be called suction mode. The blowing and sucking device 1 can selectively work in a blowing mode or a sucking mode according to the actual needs of users. The blowing device 1 as a whole extends along the direction indicated by the arrow A in FIG. 1 , and this direction is defined as the longitudinal direction. The blowing device 1 mainly includes a main body 10 and an air pipe 2 that can be connected to the main body 10 . The body 10 includes a housing 14 extending generally longitudinally. The shell 14 is used to cover the outside and play a protective role. In different embodiments, the shell 14 may be a shell formed in one piece, or may be a whole composed of a plurality of half shells, and the half shells are fixedly connected by fixing elements such as screws. The housing 14 may include a single layer or a multi-layer shell group, or may include multiple shells for protecting respective components. The air duct 2 can be connected to the main body 10 . The inside of the air duct 2 is hollow, and is used to provide air circulation, so that the air is blown from the air duct 2 to the outside or sucked in from the outside. In this embodiment, the air duct 2 is detachably connected to the main body 10 . When the blowing and suction device 1 is not needed at ordinary times, the air pipe 2 and the main body 10 can be disassembled and separated, so that the overall length of the blowing and suction device 1 can be reduced. When the air blowing device 1 needs to be used, the air pipe 2 can be connected with the main body 10, so as to perform the corresponding blowing function or air suction function. It can be seen from FIG. 1 that the air duct 2 is located at the longitudinal front end of the main body 10 .

The blowing device 1 comprises an air flow generating device. As shown in FIG. 2 , the airflow generating device is accommodated in the casing 14 and is operable to generate airflow. The airflow generated by the airflow generating device can move in a certain direction. In this preferred embodiment, the airflow generating means controllably generates airflows moving in different directions. For example, the airflow generating device can generate an airflow moving in a direction toward the longitudinal front end, and can also generate an airflow moving in a longitudinal rear end direction opposite to the longitudinal front direction. The different directions in which the airflow moves may form an included angle of 180 degrees. In other embodiments, the different directions of airflow movement may also form other angles, such as 60, 90, 120, 150 degrees, and so on. As shown in FIG. 2 , a common airflow generating device includes a rotatable fan 3 and a motor 4 for driving the fan 3 to rotate. The motor 4 is used to provide rotational power. According to the source of power, the motor 4 can be an air motor, an electric motor driven by electricity, or a gasoline motor fueled by gasoline. Electric motors include common carbon brush motors or brushless motors. In this embodiment, the motor 4 has a stator 40 and a rotor 49 rotatable relative to the stator 40 . The stator 40 is fixedly supported by a support structure 46 . The supporting structure 46 includes a front support 461 and a rear support 462 arranged longitudinally apart. The front bracket 461 and the rear bracket 462 respectively support the stator 40 . The front bracket 461 and the rear bracket 462 are also fixedly connected by bolts 463 . The rotor 49 includes a motor shaft 42 extending along the axis 41 . In this embodiment, the axis 41 extends longitudinally. The rotor 49 drives the motor shaft 42 to rotate around the axis 41 . The motor shaft 42 is connected to the fan 3 so as to drive the fan 3 to rotate accordingly. Certainly, transmission mechanisms such as gears may also be arranged between the fan 3 and the motor shaft 42 . It can optionally be rotated in a clockwise direction around the axis 41 , and can also be rotated in a counterclockwise direction, as indicated by the double arrow B in FIG. 2 . Of course, in other embodiments, the motor 4 can also only rotate in one direction. In other embodiments, the airflow generating device is not limited to include the fan 3 and the motor 4 , for example, it is driven by new power technologies such as magnetic force to generate airflow.

The fan 3 can be rotationally driven to generate air flow. In this embodiment, the fan 3 is connected to the motor shaft 42 so as to be driven by the motor shaft 42 to rotate accordingly. The fan 3 and the motor 4 are generally longitudinally distributed front and rear in the main body 10 . The fan 3 is closer to the longitudinal front end. The motor 4 is closer to the longitudinal rear end. The fan 3 includes at least an axial fan. The axial flow fan is capable of rotating around the fan axis 39 and generates an air flow parallel to the extending direction of the fan axis 39 . In other embodiments, the fan 3 may be composed of multiple stages of axial flow fans, or may be composed of only one stage of axial flow fans. In addition, the fan 3 may also have a multi-stage combination of other types of fans, but at least one of the stages is an axial flow fan. In other embodiments, the fan 3 may also be formed by a mixed flow fan. Because the mixed-flow fan can also generate an airflow that moves along the direction in which the fan axis 39 extends. In this embodiment, as shown in FIG. 3 , the fan 3 is composed of a first-stage axial flow fan. The fan 3 includes a hub 31 and several blades 32 arranged on the hub 31 . The hub 31 is provided with a connection hole 33 for mating with the motor shaft 42 . The connecting hole 33 preferably has a flat square shape, which just fits with the flat square structure on the motor shaft 42 , so that the fan 3 and the motor shaft 42 form no relative rotation. It should be noted that the connecting hole 33 is a through hole with a certain longitudinal thickness, and the motor shaft 42 is inserted into a part of the connecting hole 33 along the longitudinal direction, but not all the connecting holes 33 are inserted by the motor shaft 42 . The purpose of this design is that the connecting hole 33 needs to be mated with other components. In other embodiments, corresponding spline structures may also be provided on the connecting hole 33 and the motor shaft 42 , so as to realize the connection between the fan 3 and the motor 4 without relative rotation. The blades 32 extend radially of the hub 31 . One end of the blade 32 is connected to the circumferential surface 34 of the hub 31 , and this end is a connecting end 35 , and the other end opposite to the connecting end 35 is a free end 36 . The blade 32 can be integrally formed with the hub 31 , or can be fixedly connected with the hub 31 . The side between the connecting end 35 and the free end 36 is curved so that the entire blade 32 is roughly in a curled state. The blades 32 are spirally arranged along the connecting line between the connecting end 35 and the free end 36 (that is, the radial direction of the fan 3 ), so that the blades 32 as a whole have a spiral staircase structure, so the connecting end 35 and the free end 36 are not located on the same plane. The blades 32 are evenly distributed along the circumference of the fan 3 . In a preferred embodiment, the number of blades 32 is 12, of course it can also be 9, 10, 11, 13, 14 and so on. The helical directions of the several blades 32 are consistent. The blades 32 rotate together with the hub 31 . In this embodiment, the fan axis 39 of the axial flow fan coincides with the axis 41 of the motor shaft 42 . Of course, in other embodiments, the fan axis 39 of the axial flow fan and the axis 41 of the motor shaft 42 are not coincidently arranged. In this embodiment, the plane formed by the rotation of the axial flow fan is substantially perpendicular to the axis 41 . Air passes through this plane from one side of the fan 3 and moves to the other side of the fan 3 . The starting side of fan 3 is defined as the upstream area and the other side is the downstream area. In this embodiment, the upstream area and the downstream area are distributed longitudinally forward and backward. Air passes through the fan 3 from the upstream area and moves to the downstream area, so the fan 3 is located in the path through which the air circulates. In this example, since the motor 4 and the fan 3 are arranged longitudinally, the motor 4 is also located in the path through which the air circulates. It is also worth noting that the fan 3 can selectively rotate in different directions, the first direction and the second direction. Thereby the fan 3 is rotated to generate airflows moving in different directions. It is particularly emphasized that the different moving directions of the air flow are relative to the fan 3 . Specifically, it means that the direction of the plane formed by the rotation of the fan 3 in the first working mode is different from the direction of the plane formed by the rotation of the fan 3 in the second working mode. In this embodiment, the fan 3 is controllable to rotate clockwise or counterclockwise around the fan axis 39 , as shown by the double arrow B in FIG. 2 . This is based on the premise that the fan 3 always rotates around the same fan axis. In other embodiments, the fan 3 can also rotate around different fan axes. For example, in a certain period of time, the fan 3 rotates around the first fan axis, so the fan 3 rotates in the first direction; and when in another period of time, the fan 3 rotates around the second fan axis, the first fan axis It can be arranged parallel to or at a certain angle with the axis of the second fan. The included angle here can be 90 degrees or an acute angle or other angles. In addition, in this embodiment, it is the motor 4 that controls the rotation direction of the fan 3, and the motor 4 can make the fan 3 generate an airflow that moves in one direction, and can also make the fan 3 generate an airflow that moves in another direction. In this embodiment, since the motor 4 is connected to the fan 3 for power, controlling the rotation direction of the motor 4 can control the rotation direction of the fan 3 . Controlling the forward rotation of the motor 4 can make the fan 3 rotate in the first direction, and controlling the reverse rotation of the motor 4 can make the fan 3 rotate in the second direction. In this embodiment, the first direction of the fan 3 is clockwise, and the second direction of the fan 3 is counterclockwise. In other words, the first direction is exactly opposite to the second direction. In other embodiments, a reversing clutch may also be provided between the motor 4 and the fan 3 . By changing the clutch position or/and state of the reversing clutch, the fan 3 is driven to rotate in different directions. No matter which direction the fan 3 rotates, the motor 4 can only rotate in one direction to transmit power.

As shown in FIG. 1 and FIG. 2 , the main body 10 is also provided with a handle portion 9 for holding, and the handle portion 9 is curved. Two ends thereof are respectively connected to the main body 10 to form a holding space. When operating the blowing device 1 , the handle part 9 is located above the blowing device 1 . More specifically, the handle part 9 is located above the motor 4 , so that the handle part 9 and the motor 4 can achieve an ideal weight balance. Preferably, a control switch 91 for controlling the rotation direction of the motor 4 is provided on the handle part 9 , and the control switch 91 can be operated to control the rotation of the motor 4 in a clockwise direction or in a counterclockwise direction. The control switch 91 can also integrate other control functions, such as a speed regulation function, which can adjust the speed of the motor 4 in a stepless or stepped manner. The speed regulation function also can not be arranged on the control switch 91, but utilizes other switch to control. In a preferred embodiment, the control switch 91 has at least three gear positions, that is to say, at least three operating positions. Wherein, the first operating position corresponds to the state that the motor 4 rotates in the clockwise direction or corresponds to the state in which the fan 3 rotates in the first direction; the second operating position corresponds to the state in which the motor 4 rotates in the counterclockwise direction or corresponds to The fan 3 rotates in the second direction; the third operating position corresponds to the state where the motor 4 stops working or the fan 3 stops rotating; the third operating position can be located between the first operating position and the second operating position Of course, it can also be located in other locations. The control switch 91 itself is not limited to the handle portion 9 , and can also be located at other positions on the main body 10 . In this embodiment, an electrical interface 15 is provided at the end of the handle of the blowing device 1 , and the electrical interface 15 is fixedly connected with a power cord (not shown in the figure). The power cord is used to connect an external power supply to provide AC power to the blowing device 1 . The external power supply here can be a 220V AC power supply. In other embodiments, the electrical interface 15 of the main body 10 can also be fitted with a detachable battery pack, and the battery pack can provide DC power to the inhalation device 1 after being plugged into the matching portion. Battery packs are either pluggable or fixed. Moreover, the material of the battery pack is preferably lithium battery, nickel-cadmium battery, etc., and the voltage of the battery pack can be but not limited to 40V, 56V.

As shown in FIG. 2 , FIG. 4 and FIG. 5 , the main body 10 further includes an interface 11 and a first opening 12 arranged in the longitudinal direction. Both the interface 11 and the first opening 12 are disposed on the housing 14 . The interface 11 is used to connect the air duct 2 , and the first opening 12 is used to communicate with the outside world. The airflow generated by the airflow generating device can move from the inside of the main body 10 to the outside or from the outside to the inside of the main body 10 through the first opening 12 . The interface 11 is located at the longitudinal front end of the main body 10 , and the first opening 12 is located at the longitudinal rear end of the main body 10 . The outline of the interface 11 is substantially the same as that of the air pipe 2 , and is used to connect with the air pipe 2 , so as to connect the air pipe 2 with the main body 10 . A positioning structure 16 is also provided on the main body 10 near the interface 11 . In this embodiment, the positioning structure 16 is a positioning protrusion protruding from the surface of the main body 10 for positioning and matching with a corresponding slot on the air duct 2 .

The air duct 2 is used for the circulation of the air flow. One end of the air duct 2 is connected to the interface 11 , and the other end opposite to the end has a nozzle 21 communicating with the outside world. In this embodiment, there is only one air duct 2 . Of course, in other embodiments, the air duct 2 can also be formed by combining multiple sections and has a complete air blowing or air suction function. When the air duct 2 needs to be used, each section can be connected. For example, the air duct 2 includes a detachable first section and a second section, and a fixing structure for fixed connection is also provided between the first section and the second section. The fixing structure may include an elastic clip provided on the first section, and a shape fitting matching the elastic clip is provided at a corresponding position of the second section. The shaped fitting here can be a round hole, which can just accommodate the insertion and locking of the elastic clip. Of course, it is also possible to arrange the elastic clips on the second section, and the shaped fittings on the first section. When using the air duct 2, the first section and the second section can be connected by a fixed structure to form a complete air duct for use. When the air duct 2 is not needed, the air duct 2 can be disassembled and divided into multiple sections for storage, thereby reducing the occupied area. In addition, it is also possible to additionally install accessories with auxiliary functions on the air duct 2 , for example, install an accessory at the nozzle 21 of the air duct 2 that can change the shape of the nozzle 21 , such as an accessory that widens the cross-sectional area of the air duct. Another example is to install an accessory at the mouth 21 of the air duct 2 to change the air outlet direction of the air duct, so that the direction of the mouth 21 can be changed to a certain extent, so that it can blow air in a wider direction, thereby improving work efficiency. In this embodiment, the air pipe is a straight pipe extending straightly, and there is no part with a changing pipe diameter at the end. Of course, a portion with a changing pipe diameter may also be provided at the end of the air duct or the entire air duct, so as to facilitate the adjustment of the air outlet speed. For example, a tapered structure with a gradually changing radius may be provided on the air duct 2 . In a preferred embodiment, as shown in Fig. 23 and Fig. 24, the air duct 2 is a tapered duct as a whole. One end of the air duct 2 has a larger cross-sectional area, while the other end has a relatively smaller cross-sectional area. For another example, a bending portion may be provided on the air pipe 2 , so that the extending direction of the air pipe 2 is bent at the bending portion. In a preferred embodiment, the bent portion is arranged close to the nozzle 21 of the air duct 2 . In addition, in order to reduce the pressure of holding, rollers supported on the ground are provided near the bending portion of the air duct 2 . In this way, when performing the blowing function, the weight of the air duct 2 is supported by the rollers to effectively divert air. Due to the requirements of safety regulations, the length of the air duct 2 ranges from 500 mm to 800 mm, preferably around 550 mm. The cross-sectional area of the air duct 2 ranges from 5000 square millimeters to 15000 square millimeters, preferably around 8000 square millimeters. As shown in FIG. 4 and FIG. 5 , one end of the air duct 2 has a connecting port 25 connected to the main body 10 , and the other end is provided with a nozzle 21 communicating with the outside world. In the embodiment of Fig. 1, the connecting port 25 of the air pipe 2 connected to the main body 10 has a smaller cross-sectional area, preferably its diameter is 100 mm, while the mouth 21 of the air pipe 2 has a larger cross-sectional area, preferably Its diameter is 110 mm. Therefore, the cross-sectional area of the connecting port 25 is smaller than that of the nozzle 21 . After the air duct 2 is connected to the main body 10 , the projections of the nozzle 21 of the air duct 2 and the first opening 12 on a plane perpendicular to the fan axis 39 also coincide at least partially. The section formed by the nozzle 21 roughly forms a certain angle with the horizontal line. When the handle portion 9 at the longitudinal rear end of the blowing device 1 is held by the user on the air duct 2, the user's hand naturally hangs down not close to the ground, but about tens of centimeters to 1 meter away from the ground. And the nozzle 21 of the air duct 2 that is positioned at the longitudinal front end of the blowing device 1 can make the nozzle 21 closer to the ground due to the presence of a certain angle with the horizontal line. The air duct 2 can be detachably connected to the interface 11, or can always be fixedly connected. In this embodiment, the air pipe 2 is connected to the main body 10 through the interface 11 no matter in the blowing mode or the suction mode, and there is no need to switch between different modes, so the air pipe 2 can be fixedly connected to the main body 10 . During transportation or storage, the air duct 2 is separated from the main body 10 to reduce the occupied volume. The nozzle 21 of the air duct 2 also refers to the second opening, and the second opening is relative to the first opening 12 of the casing 14 . Therefore, in this embodiment, the main body 10 has only one interface 11 connected with the air duct 2 .

As shown in FIG. 2 , the blowing device 1 also includes a safety mechanism 8 . The function of the safety mechanism 8 is to ensure that the starting circuit will not be turned on until the air pipe 2 is connected to the main body 10, and the user can operate the control switch 91 to function. When the air pipe 2 is not connected to the main body 10, the safety mechanism 8 disconnects the starting circuit, and the motor 4 cannot be operated normally even if the user operates the control switch 91, thereby ensuring safety. In this embodiment, the safety mechanism 8 is disposed close to the interface 11 of the main body 10 . The safety mechanism 8 includes a trigger lever 81 and a trigger switch 82 abutting against the trigger lever 81 . The trigger switch 82 is provided with a trigger button 83 , and one end of the trigger rod 81 touches the trigger button 83 . And the other end of trigger rod 81 is a free end. When the air pipe 2 is installed with the connection interface 11, the safety mechanism 8 is triggered. Specifically, the air pipe 2 abuts against the free end of the trigger rod 81 , so that the trigger button 83 is pressed by the trigger rod 81 , so that the circuit is conducted and the control switch 91 is controlled. When the air duct 2 is detached from the interface 11, the trigger button 83 is reset to disconnect the circuit.

The first opening 12 is disposed at the longitudinal rear end of the main body 10 . In the embodiment shown in FIG. 17 , the first opening 12 has a detachable safety shield 121 . In a preferred embodiment, the safety shield 121 can rotate around a rotation axis to open or close the first opening 12 . In other embodiments, the safety shield 121 can also be fixed on the first opening 12 in a snap-fit or plug-in manner. In addition, the safety cover 121 is provided with several mesh-shaped air intake structures. Air can pass through the first opening 12 from the air intake structure, but larger particles such as branches and leaves cannot pass through, and are blocked outside the safety shield 121 . And due to the blocking effect of the safety shield, the user's hand will not extend into the first opening 12 to cause injury. In a preferred embodiment, when the safety shield 121 opens the first opening 12, the first opening 12 can be connected to the collecting device. The collection device can be an accessory detachably connected to the insufflation device 1 . The collecting device can be a cloth bag, which is used to collect foreign objects such as leaves and branches sucked in the suction mode. Of course, in the present embodiment shown in FIG. 2 , the first opening 12 is not provided with a safety shield. The first opening 12 has a substantially elliptical contour. The plane formed is inclined relative to the direction of the axis 41 . The angle of inclination is roughly between 30° and 60°, preferably the angle of inclination is 45°. The shape of the first opening 12 is substantially oval. As shown in FIG. 8 , the fan axis 39 of the fan 3 extends through the first opening 12 . In another embodiment, the first opening 12 may not be directed toward the longitudinal rear end, but the shell 14 is partially provided with a curved portion, and the first opening 12 is arranged on the curved portion, so that the first opening 12 located at the curved portion Orientation changed, no longer towards the longitudinal rear end. In one embodiment, the curved portion is curved downward, or bent toward the ground, so that the first opening 12 is disposed downward, that is, away from the direction of the handle portion 9; in another embodiment, the curved portion can be curved upward, The first opening 12 is arranged upwards, that is, in a direction close to the handle portion 9 .

And the interface 11 is arranged at the longitudinal front end of the main body 10 . The interface 11 is used to connect with the air pipe 2 . Specifically, the interface 11 is connected to the connection port 25 of the air duct 2 . There is only one interface 11 on the main body 10, so the air pipe 2 is connected to the interface 11 no matter in blowing mode or suction mode. The shape of the interface 11 basically matches the connection port 25 of the air duct 2 . In this embodiment, the interface 11 is arranged toward the longitudinal front end, while the first opening 12 is arranged toward the longitudinal rear end, so the opening directions of the interface 11 and the first opening 12 are opposite. And the interface 11 and the first opening 12 are located on opposite sides of the airflow generating device. For the main body 10, when the blowing and suction device 1 is in the blowing mode, as shown in FIG. Tube 2. While in the suction mode, air enters the main body 10 from the interface 11 and then leaves the main body 10 from the first opening 12 along a straight line. Therefore, in the blowing mode and the suction mode, the airflow generated by the airflow generating device moves in opposite directions between the interface 11 and the first opening 12 . In addition, it should be noted that in this embodiment, the fan axis 39 of the fan 3 extends through the interface 11 . For the fan 3 and the motor 4 of the airflow generating device, the motor 4 is located between the fan 3 and the first opening 12 , so that the distance from the motor 4 to the first opening 12 is smaller than the distance from the fan 3 to the first opening 12 . In this embodiment, the fan 3 , the motor 4 and the first opening 12 are sequentially arranged along a straight line. The interface 11 and the first opening 12 are respectively located on two sides of the fan 3 along the extending direction of the fan axis 39 . In other words, the interface 11 and the first opening 12 are located on opposite sides of the airflow generating device. The projection of the interface 11 and the first opening 12 on a plane perpendicular to the fan axis 39 at least partially coincides. Therefore, the interface 11 , the fan 3 , the motor 4 and the first opening 12 are sequentially arranged along a straight line.

After the air duct 2 is connected to the main body 10, in the blowing mode, the air flow generating device generates an air flow moving in one direction, and the air enters the shell 14 from the first opening 12 of the main body 10, and then moves in the main body 10 until the air flow from the air duct is formed. The air-flow that the nozzle 21 of 2 blows out, the moving direction of air-flow is as shown in the single line arrow among Fig. 4. While in the suction mode, the air duct 2 is still connected to the main body 10, and the position of the connection with the main body 10 has not changed. The airflow generating device generates an airflow moving in another direction. In this mode, the moving direction of the airflow is different from that in the blowing mode. The air enters the air duct 2 from the nozzle 21 . The airflow moves inside the main body 10 after being inhaled, and finally forms an airflow discharged from the first opening 12, as shown by the single-line arrow in FIG. 5 . Of course, it is also emphasized that in the suction mode, since the nozzle 21 is aimed at the ground, foreign objects such as leaves, branches, dust, etc. will enter the main body 10 through the nozzle 21 along with the airflow. While in the blowing mode, the first opening 12 is away from the ground, so only air will enter the main body 10 . Therefore, as shown in FIG. 6, inside the blowing device 1, an airflow channel 55 for gas flow is formed between the first opening 12 and the nozzle 21. Airflow channel 55 . The gas flow channel 55 is the path through which the gas moves in the blower device 1 . Under normal circumstances, since the blowing and sucking device 1 has different working modes, blowing mode and sucking mode, for the consideration of respective performance, the airflow channels are different in different working modes. In the present invention, however, the airflow passage 55 is a passage for the airflow to be used in both the blowing mode and the suctioning mode. That is, the airflow moves in the same airflow channel both in the blowing mode and in the suction mode. It's just that in the two modes, the direction of airflow movement is different. Optimally, the directions of air movement in the two modes are opposite. Specifically, in the blowing mode, the air flow moves from the first opening 12 to the nozzle 21 . While in suction mode, the air flow moves from the nozzle 21 to the first opening 12 . In addition, it should be noted that the airflow channel 55 extends longitudinally as a whole, and of course the airflow channel 55 may also be partly bent or bent. In this embodiment, both the fan 3 and the motor 4 are located in the airflow channel 55 . When in the blowing mode, the fan 3 is driven by the motor 4 to rotate, and the fan 3 rotates clockwise around the fan axis 39; when switched to the suction mode, the fan 3 is driven by the motor 4 to rotate, and the fan 3 rotates around the fan axis 39 Rotate counterclockwise. However, in the embodiment shown in FIG. 20 , the fan 3 is still located in the airflow channel 55 , and the motor 4 is not located in the airflow channel 55 .

As shown in FIGS. 7 and 8 , the blowing device 1 further includes a duct 5 . The function of the duct 5 guides the airflow generated by the fan 3 to move toward the air duct 2, thereby making the direction of the airflow more consistent and improving the effect of the entire airflow. In this embodiment, the duct 5 is also located in the airflow channel 55 and between the interface 11 and the fan 3 . The duct 5 is disposed close to the interface 11 of the main body 10 , and the duct 5 is closer to the longitudinal front end than the fan 3 , or the duct 5 is located on the side of the fan 3 away from the first opening 12 . When the fan 3 generates an airflow moving towards the interface 11 , the airflow will first pass through the duct 5 and then reach the interface 11 . In other words, before reaching the interface 11 , the airflow will first pass through the guide duct 5 . The duct 5 includes a guide body 51 inside the casing 14 , a stator vane 52 fixedly connected to the guide body 51 , and a guide cover 53 for accommodating the guide body 51 and the stator vane 52 . The wind deflector 53 is located inside the casing 14 , and a space is formed between the wind deflector 53 and the casing 14 . In this embodiment, the wind deflector 53 is a hollow cylindrical casing, and the cylindrical casing accommodates the deflector 51 and the stator vane 52 inside. The airflow generated by the fan 3 passes through the inside of the windshield 53 . The wind deflector 53 is also preferably provided with a protruding fixing element 54 . The fixing element 54 is disposed on the outer side of the wind deflector 53 and can be fixedly matched with the inner side of the housing 14 , so as to fix the position of the wind deflector 53 . In this embodiment, the fixing element 54 may be a rib that protrudes from the surface and is arranged in a ring shape. In another embodiment, as shown in FIG. 17 , a vibration damping mechanism 56 is further provided between the wind deflector 53 and the housing 14 , and the vibration damping mechanism 56 is used to reduce the vibration transmitted from the wind deflector 53 to the housing 14 . A positioning slot 57 is provided on the shroud 53 , and the damping mechanism 56 is accommodated in the positioning slot 57 . A positioning step 58 matching the positioning groove 57 is provided at a corresponding position on the inner wall of the housing 14 . In this embodiment, the damping mechanism 56 is an elastic ring surrounding the wind deflector 53 . Certainly, the damping mechanism 56 may also be a block-shaped elastic block. It should also be noted that the damping mechanism 56 is preferably located at the longitudinal front end of the wind deflector 53 . The wind deflector 53 also has a fitting portion 59 provided at the longitudinal rear end. The fitting portion 59 also extends in the longitudinal direction. The mating portion 59 has a tapered structure with a gradually changing radius. The tapered structure is similar to a bell mouth opening toward the rear end, and its function is to partially fit the motor cover 44 surrounding the motor 4 . The motor cover 44 can be partially engaged and fixed with the engaging portion 59 . The shroud 53 extends longitudinally, and its longitudinal ends are not closed. Of course, in other embodiments, the casing 14 can also be used as the wind deflector 53 .

The guide body 51 is located in the guide cover 53 . The guide body 51 generally extends along the direction of the axis 41 and has a tapered structure. One end faces the interface 11 ; the other end faces away from the interface 11 , and the end facing away from the interface 11 has an opening. The extending direction of the guiding body 51 is consistent with the extending direction of the guiding cover 53 . The guide body 51 has a hollow interior, and other components can enter the inside of the guide body 51 through the opening. The airflow generated by the fan 3 passes outside the guide body 51 . Therefore, the guide body 51 cooperates with the air guide cover 53 so that the airflow generated by the fan 3 passes between the guide body 51 and the air guide cover 53 .

Stator vanes 52 are provided outside the guide body 51 . The stator blades 52 are preferably uniformly distributed on the guide body 51 in the circumferential direction. The stator blade 52 is fixedly connected with the guide body 51 . Preferably, the plane formed by the stator blades 52 is generally inclined at a certain angle to the direction of the axis 41 . The tilt angle can be set between 8 degrees and 15 degrees. The number of stator blades 52 is approximately seven. The duct 5 is located in the airflow channel 55 . The space between the guide cover 53 and the guide body 51 is for the airflow to pass through. The stator vane 52 is arranged between the guiding body 51 and the shroud 53 , just located in the airflow channel 55 , and can guide the passing airflow. Because in the blowing mode, the duct 5 is located in the downstream area of the fan 3, the airflow blown from the fan 3 produces a rectification effect when passing through the duct 5, thereby adjusting the swirl direction of part of the airflow, reducing the generation of eddy currents, and making the overall airflow direction more clear. Neat, improve the blowing effect and efficiency of the airflow. It should be noted that both the stator blades 52 and the blades 32 of the fan 3 are arranged circumferentially around the axis. In order to avoid mutual interference between the two in the circumferential direction, and ensure that there will be no overlap of blades at any phase in the circumferential direction to produce a similar resonance superposition effect, the numbers of the stator blades 52 and blades 32 are set to be mutually prime numbers. For example, the number of stationary blades 52 may be set to six, while the number of blades 32 is correspondingly eleven. For another example, the number of stationary blades 52 is 7, while the number of blades 32 corresponds to 12. In this way, when the fan 3 is rotating, at any moment, the number of overlapping phases between the blades 32 and the stationary blades 52 is at most one. The duct 5 can be located in the main body 10 and integrally formed and fixed with the main body 10 , of course, the duct 5 can also be fixedly fitted with the main body 10 as an independent component. In another embodiment, the duct 5 can also be arranged in the air duct 2 .

As shown in Figures 4 and 5, the blowing and sucking device 1 has at least two working modes: a blowing mode and a sucking mode. When the suction device 1 is in the blowing mode, the fan 3 is operable to rotate in a first direction, so that the generated airflow is blown out from the nozzle 21 of the air duct 2 . When the suction device 1 is in the suction mode, the fan 3 is operable to rotate in the second direction, so that the generated airflow is sucked from the nozzle 21 of the air duct 2 . It is worth noting that the air pipe 2 is connected to the interface 11 of the main body 10 no matter in the blowing mode or the suction mode. In this way, when the blowing and suction device 1 switches from the blowing mode to the suction mode, or from the suction mode to the blowing mode, the user does not need to perform additional operations or movements on the position and fixing of the air duct 2 . It is only necessary to control the rotation direction of the fan 3 . When switching to the blowing mode, the fan 3 is controlled to rotate in the first direction. When switching to the suction mode, the fan 3 is controlled to rotate in the second direction. Further, in the blowing mode, air enters from the first opening 12 and blows out from the nozzle 21 . While in the suction mode, air is sucked in from the nozzle 21 and expelled from the first opening 12 . No matter whether it is a blowing mode or a suction mode, the path through which the air passes is located between the first opening 12 and the nozzle 21, and the path through which the air moves is the same. It's just that the direction of air movement is different in blow mode and suction mode. The air flow channel 55 is thus shared by the blower device 1 in either the blow mode or the suction mode. This further simplifies the structure of the airflow channel of the blowing device 1 , and it is not necessary to additionally provide a second airflow channel.

In addition, since the blowing device 1 has at least two different working modes, it is necessary to consider how to switch the working modes conveniently. Therefore, the blowing and sucking device 1 has a blowing and sucking mode switching switch, and the user can switch modes by operating the blowing and sucking mode switching switch, such as switching from the first working mode to the second working mode, or switching from the second working mode to the first working mode . In the present invention, the air duct 2 does not need to move or change its position when switching modes, so the blowing mode switch can be the control switch 91 . When the operation control switch 91 is switched to the position where the fan 3 rotates in the first direction, the blowing device 1 is in the blowing mode. When the operation control switch 91 is switched to the position where the fan 3 rotates in the second direction, the blowing device 1 is in the suction mode. The advantage brought by this is that it is very convenient for the user to operate when switching the working mode, and there is no need to replace the air duct 2 or move the air duct 2 . When the blowing device 1 is not in use, the air pipe 2 can be disassembled from the main body 10 for easy storage. When the blowing and sucking device 1 needs to be used, no matter it is blowing mode or sucking mode, it is only necessary to install the air pipe 2 on the main body 10, and then operate the control switch 91 to start the motor 4 and rotate in the corresponding direction. Specifically, when the blowing device 1 is in the blowing mode, the operation control switch 91 moves to the first operating position, and when the blowing device 1 is in the sucking mode, the operation control switch 91 moves to the second operating position. Even if mode switching is required, the air duct 2 does not need to be disassembled frequently. Moreover, since the fan 3 of the blowing device 1 includes an axial fan, since the axial fan can generate a higher wind speed, compared with the traditional centrifugal fan, the blowing efficiency is greatly improved without increasing the size. Since the motor 4 is connected to the fan 3, when the motor 4 rotates clockwise, the motor 4 will drive the fan 3 to rotate clockwise; and when the motor 4 rotates counterclockwise, the motor 4 will drive the fan 3 to rotate counterclockwise. Rotate clockwise. Therefore, in this embodiment, the control switch 91 controls the fan 3 indirectly in the form of controlling the rotation direction of the motor 4 . As shown in FIGS. 29 to 31 , the motor 4 includes a stator 40 and a rotor 49 rotatable relative to the stator 40 . The stator 40 and the rotor 49 are respectively wound with coils and connected to a circuit, and the relative rotation of the stator 40 and the rotor 49 can be realized by using the principle of electromagnetic induction to generate current after the circuit is turned on. The control switch 91 is used to control the on-off of the circuit. The control switch 91 has multiple gear positions, or multiple operating positions. Operationally movable between various gears or operating positions. In the embodiment shown in Figure 29, the control switch 91 has a pin 102 and a pin 105. When the control switch 91 is operatively moved to the first operating position, the pin 102 and the pin 103 are turned on and lead The pin 104 and the guide 105 are turned on. According to the turned-on circuit, the current direction of the circuit where the stator 40 is located is the same as the current direction of the circuit where the rotor 49 is located. When the motor 4 rotates clockwise, the motor 4 rotates clockwise as a whole, and the corresponding fan 3 also rotates clockwise. At this time, the blowing device 1 is in the blowing mode. When it is necessary to switch the mode of the blowing device 1, it is only necessary to operate the control switch 91 to move to the second operating position, as shown in FIG. At this time, the current direction of the circuit where the stator 40 is located changes, but the current direction of the circuit where the rotor 49 is located does not change, so the rotor 49 rotates counterclockwise relative to the stator 40, and the motor 4 and the fan 3 rotate counterclockwise accordingly. The blower device 1 is now in suction mode. Of course, it is easy for those skilled in the art to imagine that when the control switch 91 is moved to different operating positions, the current passing through the stator 40 is kept constant, while the direction of the current flowing through the rotor 49 is changed. In short, when the control switch 91 moves to different positions, the direction of the current passing through one of the rotor 49 and the stator 40 can be changed. Therefore, the method of controlling the blowing device to switch the blowing mode is to operate the control switch 91 to move from the first operating position for rotating the axial fan in the first direction to the second operating position for rotating the axial fan in the second direction. However, during the switching process, the position where the air duct 2 is connected to the main body 10 remains unchanged. In a preferred embodiment, the control switch 91 may also have a third operating position different from the first and second operating positions. In this operating position, as shown in Figure 31, the pin 102 and the pin 105 are not connected to other pins, so the circuit connecting the stator 40 and the rotor 49 is not conducted, that is to say, the motor 4 does not rotate , is in a shutdown state. Therefore, the control switch 91 can control the motor 4 to switch among three states, which are forward rotation state, stop state and reverse rotation state. In addition, as shown in FIGS. 29 to 31 , a safety switch 84 of the linkage safety mechanism 8 may also be provided on the circuit where the stator 40 and/or the rotor 49 are located. When the safety switch 84 is not triggered, no matter which operating position the control switch 91 is in, the whole circuit is in an open circuit state, and the motor 4 will not start all the time. Only when the safety switch 84 is triggered, the control switch 91 can function as a control circuit.

In addition, as shown in FIG. 2 , FIG. 6 and FIG. 7 , the blowing device 1 further includes a crushing mechanism 6 . Since the fan 3 or/and the motor 4 are located in the airflow passage 55, in the suction mode, larger objects such as branches and leaves will enter the main body 10 from the nozzle 21 along with the air, so the fan 3 or/and the motor 4 will be affected. Cause damage and affect the service life of the blowing device 1 . Therefore, the purpose of setting up the crushing mechanism 6 is to crush the inhaled matter with a larger volume and convert it into smaller and lighter objects passing through the fan 3, so as to reduce the damage of the fan 3 caused by the high-speed impact of the heavier objects on the fan 3. Therefore, the pulverizing mechanism 6 is arranged at a position between the fan 3 and the nozzle 21. In this embodiment, the pulverizing mechanism 6 is arranged at a position close to the interface 11 in the main body 10, so that the object to be pulverized enters from the nozzle 21 in the suction mode. After the main body 10, it first passes through the crushing mechanism 6 and then passes through the fan 3. In this embodiment, the duct 5 is located between the pulverizing mechanism 6 and the fan 3, and the fan 3 and the pulverizing mechanism 6 are respectively located on opposite sides of the duct 5, that is to say, the pulverizing mechanism 6 is closer to the duct than the duct 5. Mouth 21. The crushing mechanism 6, the duct 5 and the fan 3 are sequentially arranged along a straight line. The duct 5 is located on a side of the fan 3 away from the first opening 12 . The crushing mechanism 6 can be driven to rotate around a rotation axis to produce a crushing effect. In this embodiment, the crushing mechanism 6 can be driven by the motor 4 to rotate. The blowing device 1 includes a transmission mechanism 7 connecting the fan 3 and the crushing mechanism 6 . The transmission mechanism 7 makes the crushing mechanism 6 rotate. In this embodiment, the rotation axis of the crushing mechanism 6 coincides with the rotation axis of the fan 3 . Certainly, the rotation axis of the crushing mechanism 6 and the rotation axis of the fan 3 may also be arranged in parallel or at an acute angle. Since the fan 3 in this embodiment is also driven by the motor 4, the motor 4 can simultaneously drive the fan 3 and the crushing mechanism 6 to rotate together. In a preferred embodiment, the fan 3 and the crushing mechanism 6 can rotate synchronously. When the fan 3 rotates in the first direction, the crushing mechanism 6 also rotates in the first direction; when the fan 3 rotates in the second direction, the crushing mechanism 6 correspondingly rotates in the second direction. When the crushing mechanism 6 rotates, the crushing mechanism 6 rotates at a high speed to form a cutting plane approximately perpendicular to the axis 41, which does not affect the air circulation in the blowing mode; while in the suction mode, both air and the object to be crushed will pass through the cutting plane, wherein , the air can pass through the cutting plane without loss, and the objects to be pulverized will be cut into fine objects when passing through the cutting plane, and then pass through the fan 3, thereby achieving the purpose of protecting the fan 3 and facilitating collection. As shown in FIGS. 2 and 8 , the transmission mechanism 7 is a transmission shaft 71 extending longitudinally. The transmission shaft 71 can rotate around the axis 41 , of course, the rotation shaft 71 can also prevent the transmission shaft 71 from rotating around the axis 41 through some eccentric structures. One end of the transmission shaft 71 is connected to the fan 3 , and the other end is connected to the crushing mechanism 6 , so that the fan 3 and the crushing mechanism 6 move synchronously. One end of the transmission shaft 71 connected to the fan 3 is connected to the connection hole 33 of the fan 3 through a structure such as a flat square or a spline. Since the motor shaft 42 and the transmission shaft 71 are located on both sides of the fan 3 respectively, the motor shaft 42 of the motor 4 is connected to the fan 3 from one side of the connection hole 33, and the transmission shaft 71 connected to the crushing mechanism 6 is connected to the other side of the connection hole 33. Side connection fan 3. In this embodiment, the transmission shaft 71 is not directly connected to the motor shaft 42 , but the linkage between the two is realized through the transmission of the fan 3 . And after pulverizing mechanism 6 is installed on transmission shaft 71, this end of transmission shaft 71 is also provided with anti-skid structure 74, and the effect of anti-skid structure 74 is to prevent pulverizing mechanism 6 from moving relative to transmission shaft 71 axially. In this embodiment, the anti-slip structure 74 is a pin that can be inserted into a socket on the transmission shaft 71 . In addition, the anti-slip structure 74 also includes gaskets and the like. Since the motor 4 and the pulverizing mechanism 6 are located on opposite sides of the duct 5 , the transmission shaft 71 passes through the duct 5 to connect the motor 4 and the pulverizing mechanism 6 . In this embodiment, the transmission shaft 71 passes through the hollow inside of the guide body 51 of the duct 5 in the axial direction. As shown in FIG. 6 , a support bearing 72 for supporting the transmission shaft 71 is also provided between the transmission shaft 71 and the deflector 51 . The transmission shaft 71 is rotatably supported relative to the support bearing 72 . The number of support bearings 72 may be one or more. In this embodiment, there are two supporting bearings 72 , which are arranged at a certain distance along the extending direction of the transmission shaft 71 . In other embodiments, since the transmission mechanism 7 can selectively cut off the transmission from the fan 3 to the crushing mechanism 6, when the fan 3 rotates, the crushing mechanism 6 may not rotate. In this embodiment, the transmission mechanism 7 includes a clutch for clutching the motor shaft 42 . When the clutch is selectively connected to the motor shaft 42, the fan 3 and the crushing mechanism 6 rotate together; when the clutch is selectively disconnected from the motor shaft 42, the fan 3 can still rotate, but the crushing mechanism 6 does not rotate. .

In the embodiment shown in FIG. 2 and FIG. 7 , the fan 3 and the duct 5 are located on the same side of the motor 4 , in other words, the motor 4 and the duct 5 are respectively located on both sides of the fan 3 . In this embodiment, one end of the transmission shaft 71 is not directly connected to the motor shaft 42 , but is connected to the fan 3 . In this embodiment, the connection hole 33 of the fan 3 is a flat through hole. The through holes respectively connect the transmission shaft 71 and the motor shaft 42 in a flat square form. Although the drive shaft 71 and the motor shaft 42 are not directly connected, they can still move synchronously by mating with the fan 3 respectively. Certainly, a spline structure may also be provided in the connection hole 33 , and the transmission shaft 71 and the motor shaft 42 are respectively connected to the fan 3 through respective splines. In other embodiments, the transmission shaft 71 and the motor shaft 42 can also be directly matched with common transmission forms such as sockets, planetary gears, and external meshing gears. Since the fan 3 is located at the longitudinal rear side of the duct 5 and the pulverizing mechanism 6 is located at the longitudinal front side of the duct 5 , the transmission shaft 71 passes through the guide body 51 of the duct 5 and is connected to the pulverizing mechanism 6 . Of course, in other embodiments, the motor 4 can also be located in the duct 5 , that is, the motor 4 and the duct 5 are located on the same side of the fan 3 . In addition, since the crushing mechanism 6 is closer to the longitudinal front end than the duct 5, in order not to reduce the amount of air entering the duct 5, a certain longitudinal distance must be maintained between the crushing mechanism 6 and the duct 5. Wherein, the shortest distance between the crushing mechanism 6 and the stationary blade 52 of the duct 5 is 0.5-50 mm. More preferably, the shortest distance between the crushing mechanism 6 and the stationary vane 52 of the duct 5 is 10-20 mm. Further, the shortest distance is 12mm or 13mm.

In the embodiment shown in FIG. 2, the shredding mechanism 6 includes a cutting blade. The cutting blade is made of alloy metal material, has a certain hardness, and can cut objects passing at high speed. The cutting blade is rotatable about the axis of rotation of the shredding mechanism 6 . In this embodiment, however, the rotation axis of the crushing mechanism 6 coincides with the axis 41 . It is also possible to arrange the rotation axis and the axis 41 to be parallel or intersect at a certain angle. The cutting blade extends longitudinally perpendicular to the axis of rotation, and includes a mounting portion 61 located in the middle of the cutting blade, and two working portions 62 extending longitudinally in the opposite direction of the mounting portion 61, and the working portion 62 includes a cutting portion 63 for cutting objects . The working portion 62 is arranged symmetrically about the center of the cutting blade. The mounting part 61 is used for connecting with the transmission mechanism 7 and includes a mounting hole 64 . The shape of the mounting hole 64 can be flat and square, and can also have a spline structure or other transmission structure, so as to be connected with the transmission shaft 71 in power. Of course, the installation part 61 can also adopt the form of a plurality of form-fitting installation holes. In addition, the mounting portion 61 further includes a positioning member 65 for fixing the mounting hole 64 on the transmission shaft 71 . The positioning member 65 can be a common snap ring, pin, nut, etc. Each working portion 62 includes an end portion 67 at the longitudinal end of the cutting blade and a side 68 between the mounting portion 61 and the end portion 67 . Since the mounting portion 61 and the end portion 67 of the cutting blade have a certain longitudinal width, each working portion 62 has two opposite sides 68 , a first side 681 and a second side 682 . Both the first side 681 and the second side 682 extend along the longitudinal direction. The cutting portion 63 is located on one of the sides, such as the first side 681 . The cutting part 63 can be a blade or a sawtooth, and is used for crushing the object to be crushed. The cutting portion 63 can of course be provided on both sides 68 . Even at end 67. In one embodiment, the cutting portion 63 is only disposed on the first side 681 , and the second side 682 of the cutting blade is curled relative to the first side 681 . That is to say, the second side 682 of the cutting blade is curved along the longitudinal direction and transversely perpendicular to the longitudinal direction. Therefore, the second side 682 can form an air lifting part, so that the air negative pressure in the downstream area of the air lifting part is reduced, and the vortex is reduced. Of course, in other embodiments, the cutting blade can also be arranged substantially in a plane as a whole without forming curls. It is worth noting that the shredding mechanism 6 may comprise more than one cutting blade, and may comprise a plurality of cutting blades. The plurality of cutting blades are arranged at a certain distance along the axial direction of the crushing mechanism 6 . In a preferred embodiment, the pulverizing mechanism 6 includes two cutting blades arranged at intervals along the axial direction. The structures of the two cutting blades are the same, and both are driven by the motor 4 to rotate synchronously with a certain phase difference. Of course, the cutting blades can also have different shapes. In another embodiment as shown in FIG. 11 , the first side 681 and the second side 682 of each working portion 62 of the cutting blade are inclined relative to each other, and the angle formed by the two sides is one An acute angle, so that the longitudinal width of the cutting blade gradually narrows from the mounting portion 61 to the end portion 67 . The benefit of this design is that the cutting blade takes up less space, allowing more room for airflow. In a preferred embodiment, when the projected area of the cutting blade on the cross-section of the air duct 2 accounts for less than 1/2 of the cross-sectional area of the entire air duct 2 , the passing effect of the airflow is better. In a more preferred embodiment, the ratio of the projected area to the cross-sectional area is 1/3 or 1/4. In another embodiment shown in FIG. 12, the first side 681 and the second side 682 of each working portion 62 of the cutting blade are arranged in an arc shape, and the arcs of the two sides are different, so that the entire The cutting blade is roughly S-shaped.

In the embodiment shown in FIG. 13 and FIG. 14 , the crushing mechanism 6 further includes a cutter head 600 and a blade 601 arranged on the cutter head 600 . The crushing mechanism 6 can also be driven to rotate by the motor 4 . Of course, the crushing mechanism 6 stops rotating when it is not driven by the motor 4 . The cutter head 600 is in the shape of a disc in this embodiment. Blades 601 are provided on the edge of the disc. The center of the cutter head 600 is provided with a connection portion 602 connected to the transmission mechanism 7 . The transmission mechanism 7 drives the cutter head 600 to rotate around the axis of the transmission mechanism 7 . Of course, the direction of rotation may be a rotation in one direction or a rotation in two different directions, positive and negative. Several installation holes 603 are provided on the edge of the cutter head 600 , and the blade 601 is matched with the cutter head 600 through the installation holes 603 . As shown in FIG. 13 , the blade 601 is provided with a pivot post 604 . The pivot post 604 passes through the plane where the blade 601 is located, while the pivot post 604 passes through the installation hole 603 and can cooperate with the side wall of the installation hole 603 . The area of the mounting hole 603 is greater than the cross-sectional area of the mounting column 604. When the cutter head 600 is driven by the transmission mechanism 7 to rotate, the blade 601 located at the edge of the cutter head 600 will move outward along the radial direction of the cutter head 600 due to centrifugal force. throw out. The blade 601 can protrude from the cutter head 600 for cutting. When the blade 601 encounters a relatively hard object, the blade 601 collides with the object and the mounting post 604 is displaced in the mounting hole 603, so that the blade 601 retracts and extends out of the cutter head 600, as shown by the dotted line in Figure 13 , like this Wear of the blade 601 can be avoided. In this embodiment, two sets of blades 601 are provided on the cutter head 600 . Of course, the cutterhead 600 can also be provided with multiple sets of blades, for example, 3 sets, 4 sets, and so on.

In another embodiment shown in FIG. 15 and FIG. 16 , the crushing mechanism 6 includes at least one set of symmetrically arranged blades 601 . Certainly, the crushing mechanism 6 may also include several groups of blades 601, for example, 2 groups, 3 groups or even more. In addition, the crushing mechanism 6 also includes a telescopic piece 605 . Blade 601 is mounted to telescoping member 605 . As shown in FIG. 15 and FIG. 16 , the telescopic member 605 can drive the blade 601 to switch between the contracted state and the expanded state. As shown in FIG. 15 , the blade 601 is opened outwards and is in an unfolded state, and the blade 601 can be crushed when opened. As shown in FIG. 16 , the blade 601 shrinks inwardly and is in a retracted state at this time. The telescopic member 605 drives the blade 601 to expand or contract in a movable manner. As shown in FIG. 15 and FIG. 16 , the telescopic member 605 is movably connected to the transmission mechanism 7 . The transmission mechanism 7 drives the telescopic member 605 to move axially. Specifically, as shown in FIG. 15 , when the transmission mechanism 7 rotates in one direction, the telescopic member 605 is subjected to the rotation in this direction and moves toward the longitudinal front end, and the blade 601 is in an unfolded state at this time. While the corresponding blowing and sucking device 1 is just in the suction mode state, the expanded blade 601 can perform pulverization. As shown in FIG. 16 , when the transmission mechanism 7 rotates in another direction, the telescopic member 605 is affected and moves toward the longitudinal rear end, and the blade 601 is in a retracted state at this moment. The shrunken blade 601 can reduce the cross-sectional area occupied by the blade 601, thereby ensuring sufficient air circulation area. And the corresponding blowing and sucking device 1 just in time is under the state of blowing mode. That is, when the blowing device 1 is in the suction mode, the blades 601 are deployed, thereby performing pulverization. When the suction device 1 is in the blowing mode, the blade 601 shrinks, thereby increasing the wind passing area.

In a further embodiment, the shredding mechanism 6 comprises a trimming cord made of a flexible material. When the transmission mechanism 7 drives the crushing mechanism 6 to rotate around its axis at a high speed, due to the effect of centrifugal force, the mowing rope extends radially, thereby acting like a cutting blade. The grass rope of such design plays pulverizing effect equally.

Even with the pulverizing effect of the pulverizing mechanism 6, the pulverized fine particles will still cause damage to the motor 4 when they pass through the motor 4. In some extreme conditions, the inhaled airflow during suction mode may carry a small amount of water stains and moisture. The moisture caused by the water stains and water vapor will also have a significant impact on the motor 4 . For this reason, the blowing and sucking device 1 of the present utility model also optimizes the design of the motor 4 so that the motor 4 is isolated from the airflow channel 55 . In an embodiment shown in FIG. 2 , the motor 4 is located in the air flow channel 55 , and the blowing device 1 includes a motor housing 44 located inside the casing 14 . A closed inner space is formed inside the motor cover 44 , the motor 4 is located in the inner space, and the airflow channel is located outside the motor cover 44 . The motor housing 44 thus isolates the motor 4 from the air flow channel 55 . The airflow passes through the airflow passage 55 between the motor cover 44 and the casing 14 , and the motor 4 is always located in the motor cover 44 without being affected. Impurities or water vapor in the airflow channel 55 will not affect the motor 4 located in the motor cover 44 . In another embodiment as shown in FIG. 18 , the motor 4 is directly arranged outside the airflow channel 55 , so as to avoid the influence of impurities or moisture in the airflow channel 55 on it. In this exemplary embodiment, therefore, the motor 4 can also be provided without a sealed motor housing 44 . As shown in FIG. 10 , the motor cover 44 may include two half shells that can be fixedly connected to each other. Of course, in other embodiments, the motor cover 44 may also be integrally formed. In addition, since the motor cover 44 covers the motor 4 , the motor cover 44 is located on a side of the fan 3 close to the first opening 12 .

In order to produce an ideal cooling effect on the motor 4 located in the motor cover 44 , a cooling passage is provided inside the blowing device 1 , and the cooling passage is used to guide the cooling air flow through the motor 4 to achieve the cooling effect. In this embodiment, the cooling passage used by the cooling airflow and the airflow passage used by the airflow generated by the fan 3 are set relatively independently. This can ensure that the cooling airflow and the airflow generated by the fan 3 operate and move independently of each other without interfering with each other. For this purpose, as shown in FIGS. 1 , 4 and 5 , the cooling channel has an air inlet 141 and an air outlet 142 provided on the housing 14 . The air inlet 141 and the air outlet 142 are set relatively independently, and the positions of the air inlet 141 and the air outlet 142 are different from those of the interface 11 and the first opening 12 on the housing 14 . The air inlet 141 and the air outlet 142 communicate with the motor cover 44 respectively. Specifically, in the blowing mode, as shown in FIG. 4, the cooling air enters the inside of the motor cover 44 from the air inlet 141 and cools the motor 4, then leaves the motor cover 44 and returns to the outside world through the air outlet 142, as shown in FIG. 4 indicated by the hollow arrow in . The airflow generated by the fan 3 enters the main body 10 from the first opening 12, and then blows out from the nozzle 21 of the air duct 2, as shown by the single-line arrow in FIG. 4 . In the suction mode, air and foreign matter are drawn into the airflow channel from the nozzle 21 of the air duct 2, and then discharged from the first opening 12, as shown by the single-line arrow in FIG. 5 . The cooling air still enters the motor cover 44 from the air inlet 141, and returns to the outside from the air outlet 142 with the heat generated by the motor 4, as shown by the hollow arrow in FIG. 5 . In this embodiment, both the air inlet 141 and the air outlet 142 are located in the longitudinal middle section of the housing 14 . The air inlets 141 and the air outlets 142 are evenly distributed on the casing 14 around the circumference. The air inlet 141 and the air outlet 142 are generally arranged as grid-shaped openings. The air inlet 141 and the air outlet 142 are distributed longitudinally and longitudinally. The air inlet 141 is closer to the longitudinal front end of the housing 14 than the air outlet 142 , and the air outlet 142 is closer to the longitudinal rear end of the housing 14 than the air inlet 141 . In a preferred embodiment, as shown in FIG. 2 , the blowing device 1 further includes a cooling fan 43 disposed inside the motor cover 44 . The cooling fan 43 is driven by the motor 4 to rotate to generate a cooling airflow. The cooling fan 43 is connected to the motor shaft 42 of the motor 4 . The cooling fan 43 is preferably located at the longitudinal rear end of the motor 4 .

As shown in FIG. 10 , the motor cover 44 is provided with a transmission interface 45 for receiving the motor shaft 42 , so as to facilitate the connection between the motor 4 inside the motor cover 44 and the fan 3 outside the motor cover 44 . The transmission interface 45 is arranged along the direction of the axis 41 . The cross-sectional area of the transmission interface 45 is small, and can only accommodate the motor shaft 42 to pass through, without affecting the sealing performance of the motor cover 44 . The motor cover 44 is preferably formed by fixedly connecting two left and right half shells. The two half-shells are fixedly connected by fixing bolts or other common fixing methods. In addition, the cooling fan 43 is also located inside the motor cover 44 .

Since both the air inlet 141 and the air outlet 142 are disposed on the casing 14 , the motor cover 44 is located inside the casing 14 . In order to ensure a smooth connection between the two, a cooling inlet 441 and a cooling outlet 442 are also provided on the motor cover 44 . The cooling inlet 441 communicates with the air inlet 141 , while the cooling outlet 442 communicates with the air outlet 142 .

In this embodiment, the size and position of the cooling outlet 442 and the air outlet 142 are set correspondingly. Preferably, the cooling outlet 442 on the motor cover 44 is aligned with the air outlet 142 on the housing 14 . The cooling air is discharged from the cooling outlet 442 to the motor cover 44 and then directly discharged to the outside through the air outlet 142 . As shown in FIGS. 9 and 10 , the motor cover 44 includes a plurality of protrusions 48 protruding outward from the surface of the cover. The ends of the bosses 48 may directly abut against the inner surface of the housing 14 . The periphery of the protruding portion 48 inside the casing 14 is still the part where the air flow generated by the fan 3 circulates. The cooling outlet 442 is located at the end of the boss 48 . And the air outlet 142 is just provided at the position where the housing 14 is abutted by the raised portion 48 . Several air outlets 142 and cooling outlets 442 are arranged in the circumferential direction. In this embodiment, the motor cover 44 extends generally in the longitudinal direction. On the other hand, the projection 48 extends in a radial direction perpendicular to the longitudinal direction. In other words, the protrusions 48 are evenly distributed along the circumference of the axis 41 . In this embodiment, there are four raised portions 48, and the angle between two adjacent raised portions 48 is 90 degrees. Of course, the number of raised portions 48 can also be 3, 5, 6, etc. As shown in FIG. 9 , when the air passes through the raised portion 48 , the air passes through the gap between the raised portion 48 and the casing 14 , and this part of the gap constitutes a part of the air flow channel 55 . And because in the suction mode, the motor cover 44 and the protruding part 48 are located in the downstream area of the fan 3, and the air passes around the protruding part 48, so the protruding part 48 can also play a similar effect of guiding air. Likewise, in order to reduce the resonance superposition effect, the numbers of the protrusions 48 and the blades 32 are set to be prime numbers to each other. For example, the number of protrusions 48 is four, and the number of blades 32 is eleven. For another example, the number of protrusions 48 is five, and the number of blades 32 is twelve. In this way, when the fan 3 is rotating, at any moment, the number of overlapping phases between the blades 32 and the protrusions 48 is at most one. In the suction mode, the cooling air enters the motor cover 44 and moves from the protrusion 48 to the cooling outlet 442 , and finally flows from the air outlet 142 to the outside. In other embodiments, the cooling outlet 442 of the motor cover 44 may not be directly aligned with the air outlet 142 on the casing 14 , but is discharged from the air outlet 142 after passing through a passage.

In this embodiment, the air inlet 141 is not directly aligned with the cooling inlet 441 , but is staggered by a certain distance in the longitudinal direction or in the circumferential direction perpendicular to the longitudinal direction. Therefore, as shown in FIGS. 4 to 6 , a guide channel 80 is further provided between the cooling inlet 441 and the air inlet 141 . The circulation of cooling air between the cooling inlet 441 and the air inlet 141 passes through the guide passage 80 . In other words, the cooling air enters the motor housing 44 after entering the housing 14 through the guide channel 80 . What constitutes the guide channel 80 is the gap between the wind deflector 53 and the casing 14 . And because the airflow produced by the fan 3 passes through the inside of the air guide 53 , and the cooling air passes through the guide channel 80 , the air guide 53 can still separate the cooling air from the blowing airflow produced by the fan 3 . In this embodiment, the matching portion 59 of the shroud 53 of the duct 5 wraps around the motor cover 44 . Of course, in other embodiments, the shroud 53 can also be completely separated from the motor cover 44 . The cooling inlet 441' that basically fits the cooling inlet 441 is provided on the shroud 53 . Air enters the interior of the casing 14 from the air inlet 141, then moves in the gap between the casing 14 and the shroud 53, and enters the interior of the motor casing 44 through the cooling inlets 441, 441'. In this embodiment, the cooling inlet 441' is disposed on the matching portion 59.

The suction device 1 has at least two working modes: blowing mode and suction mode. In the blowing mode, the air pipe 2 is fixedly connected to the main body 10 through the interface 11 . The fan 3 is controllably rotated about its axis in a first direction, thereby generating an air flow. Of course, the way to control the rotation direction of the fan 3 is preferably to control the switch 91 . Air enters the interior of the main body 10 from the first opening 12 , and then passes through the air passage 55 between the motor cover 44 and the casing 14 and the fan 3 . The air flow channel 55 between the motor cover 44 and the housing 14 forms an upstream region of the fan 3 in the blowing mode. Due to the sealing function of the motor cover 44 , air will not enter the inside of the motor cover 44 . After the air passes through the fan 3 from the upstream area, the air passes through the inside of the shroud 53 . Specifically, the inner space between the guide body 51 and the guide cover 53 constitutes an air flow channel 55 through which gas passes, and this part of the air flow channel 55 forms a downstream area in the blowing mode. The air is finally blown out from the nozzle 21 of the air duct 2 .

In the suction mode, the air pipe 2 is still fixedly connected to the main body 10 through the connection port 11 . The fan 3 is controllably rotated about its axis in a second direction, thereby generating an air flow. The second direction is different from the second direction. The way to control the rotation direction of the fan 3 is preferably to control the switch 91 . The air communicates with foreign matter such as leaves and enters from the nozzle 21 of the air duct 2 , and then passes through the airflow channel 55 between the guide body 51 and the guide cover 53 . The air flow channel 55 forms the upstream area of the fan 3 in the suction mode. After passing through the fan 3 , it enters the airflow channel 55 between the motor cover 44 and the casing 14 . This partial area forms the downstream area in suction mode. Finally it moves from the downstream area to the first opening 12 of the main body 10 to discharge. In this mode, the first opening 12 is preferably connected with a collection device such as a garbage bag, and the garbage leaves and air can enter the garbage bag for recycling after being discharged from the first opening 12 .

In a conventional blowing device, when the blowing device performs a suction mode, the collection device is mounted and connected to the blowing device. And when the blowing device performs the blowing mode, the collection device needs to be disassembled from the blowing device. Therefore, when encountering some working conditions that require frequent switching of blowing and suction modes, the collecting device needs to be frequently disassembled and assembled from the blowing and suction device accordingly. As shown in FIG. 39 and FIG. 40 , in this embodiment, no matter whether the blowing and sucking device 1 is in the blowing mode or the sucking mode, the collecting device 200 can be connected to the blowing and sucking device 1 . The collection device 1 includes a collection part 201 and an air intake part 202 that is movable relative to the collection part. The collecting part 201 is used to collect garbage, and the air intake part 202 is used to circulate the air inside and outside the collecting device 200 . As shown in FIG. 40 , when the blowing and suction device 1 is in the suction mode, the moving direction of the air and the dust is shown by the arrows in FIG. 40 . The air intake part 202 is accommodated in the collection part 201, and at this time, the garbage inhaled from the suction device 1 can directly enter the collection part 201 for collection. As shown in FIG. 39 , when the blowing device 1 is switched to the blowing mode, the moving direction of the air is shown by the arrow in FIG. 39 . The intake part 202 moves to expose the collecting part 201 . The air required for the air blowing device 1 to perform blowing is entered into the blowing device 1 through the air intake part 202 . In this way, the collection device 201 is always connected to the blowing device 1 , and the blowing mode can be switched without disassembly. In this embodiment, the collection device 200 further includes an installation part 203 that is installed and connected with the blowing device 1 . The collecting device 200 is always connected to the blowing device 1 via a mount 203 . The installation part 203 is preferably fixedly arranged on the air intake part 202 . The installation part 203 may be a hook structure. The hook structure makes the air intake part 202 fixedly connected with the blowing device 1 . The collecting part 201 is provided with an operating part 204 , so that the user can manipulate the collecting part 201 to move relative to the air intake part 202 through the operating part 204 . In this embodiment, the operating part 204 is a handle installed on the collecting part 201 . The user drives the collection part 201 to move relative to the air intake part 202 by holding the handle. In this embodiment, the collecting part 201 can pivotally move relative to the air intake part 202 . The collection device 200 includes a pivot shaft 205 respectively connecting the collection part 201 and the air intake part 202 , so that the collection part 201 and the air intake part 202 rotate relative to the pivot shaft 205 . As shown in FIG. 39 , the air intake part 202 is fixedly mounted to the first opening 12 of the blowing device 1 through the mounting part 203 . In this embodiment, the first opening 12 is disposed downward. The collection portion 201 and the air intake portion 202 form a certain angle relative to the pivot shaft 205 , so that the air intake portion 202 is exposed outside the collection portion 201 . At this moment, the blowing device 1 is in the blowing mode, and the outside air enters the first opening 12 of the blowing device 1 through the air inlet 202 . As shown in FIG. 40 , when the blowing device 1 is switched to the suction mode, the operating part 204 rotates around the pivot shaft 205 , so that the collecting part 201 rotates relative to the air intake part 202 , and the air intake part 202 is accommodated in the collecting part 201 . In this suction mode, leaves, dust and garbage discharged from the first opening 12 enter into the collection part 201 . It should be noted that the collecting part 201 is preferably provided with a second mounting part 206 . The second installation part 206 is fixedly connected with the blowing device 1 . The second installation part 206 is preferably a hook structure similar to that of the installation part 203 . In this embodiment, the collecting part 201 is a bag made of soft material. The bag has a mouth 207 through which leaf litter is collected into the bag. When not collecting, the bag can be folded and compressed into a smaller storage volume for easy storage. Common materials that make up bags can be non-woven fabrics and the like. The air intake 202 is provided near the mouth 207 of the bag. The air intake portion 202 may be made of hard material. The air intake part 202 is provided with an air intake hole 208 to facilitate gas circulation. Of course, in another embodiment, the air inlet 202 can also be selectively arranged on the blowing device 1 all the time, so that the air inlet 202 is fixed as a part of the blowing device 1 . In this embodiment, the air inlet 208 is also correspondingly arranged on the blowing device 1 .

The method of how to assemble the blowing device is disclosed below. As shown in FIG. 32 to FIG. 38 , this method includes the following steps: Step S1, assembling the first assembly. The first assembly mainly includes a fan 3 , a duct 5 , a crushing mechanism 6 and a transmission mechanism 7 for connecting the fan 3 and the crushing mechanism 6 . Step S1 assembles these components into an assembly. Step S1 includes three sub-steps of S11, S12 and S13. Specifically, in substep S11 as shown in FIG. 32 , the fan 3 is installed on the first end 711 of the transmission mechanism 7 . In this embodiment, the transmission mechanism 7 is a transmission shaft 71 , and the transmission shaft 71 has two opposite ends, which are respectively set as a first end 711 and an opposite second end 712 . The first end 711 of the transmission mechanism 7 is connected to the fan 3 in a non-rotatable manner along the extending direction of the dotted line in FIG. 32 . The first end 711 of the transmission mechanism 7 and the connecting hole 33 of the fan 3 have matching structures such as a flat square structure or a spline structure that can be connected to each other. In addition, a supporting bearing 72 is also installed on the transmission shaft 71 . The location of the support bearing 72 is generally between the first and second ends of the drive shaft 71 . The number of support bearings 72 includes two. Two support bearings 72 support the transmission shaft 71 at a certain distance. As shown in FIG. 33 , after the fan 3 is installed on the transmission shaft 71 , the substep S12 is performed. In this step, the transmission shaft 71 is inserted into the duct 5 . Since in this embodiment, the duct 5 is designed in one piece, the whole duct 5 includes parts formed integrally with the guide body 51 , the stator blade 52 and the guide cover 53 . Therefore, the drive shaft 71 can only be mated with the duct 5 in an inserted manner. The second end of the transmission shaft 72 is inserted into the guide body 51 from the tail of the duct 5 along the dotted line in the figure, and moves toward the head of the duct 5 . The inner surface of the guide body 51 is provided with a raised positioning structure. The support bearing 72 on the transmission shaft 72 is engaged with some positioning structures in the guide body 51 . The positioning structure may be a positioning step, a positioning boss and the like. As shown in FIG. 34 , after the transmission shaft 71 is mated with the duct 5 , the second end 712 of the transmission shaft 71 can pass through the head of the duct 5 . And the first end 711 of the transmission shaft 71 is still located outside the tail of the duct 5 . The fan 3 connected to the first end 711 of the transmission shaft 71 is also located outside the duct 5 . The transmission shaft 71 passes through the duct 5 , especially through the guide body 51 of the duct 5 . In sub-step S13, the crushing mechanism 6 is installed on the second end of the transmission mechanism 7 along the direction of the dotted line in the figure. The crushing mechanism 6 has a mounting portion 61 which is connected with the second end of the transmission mechanism 7 in form fit. The form fitting connection here can be flat square or spline connection. Therefore, the crushing mechanism 6 is arranged near the head of the duct 5 , while the fan 3 is arranged near the tail of the duct 5 . In order to prevent the crushing mechanism 6 from moving axially relative to the transmission mechanism 7 , an anti-skid structure 74 is installed after the crushing mechanism 6 is installed on the second end of the transmission mechanism 7 . Thus, the installation of the first component is completed, that is, step S1 is completed.

In step S2, the second assembly is assembled. As shown in FIG. 35 , the second assembly mainly includes the motor 4 and the motor cover 44 . Step S2 mainly includes two sub-steps of S21 and S22. Because the motor cover 44 includes two half-shells, in the S21 substep, the motor 4 is fixedly installed in a motor cover half-shell, and the ribs of the positioning effect are all correspondingly provided with the ribs of the positioning effect in the motor 4 and the motor cover half-shell, so that the motor 4 can be fixedly installed in the motor cover half shell. In the sub-step S22, the other half-shell of the motor cover is docked with the half-shell of the motor cover in the sub-step S21 along the direction of the double-headed line in the figure, and fixed by fixing elements such as screws. The installation of the second component is completed, so far the step S2 is completed.

In step S3, the first component and the second component are connected. As shown in FIG. 36 , specifically, the motor shaft 42 protruding from the motor cover 44 in the second assembly is mated with the fan 3 in the first assembly. The connection hole 33 of the fan 3 is a through hole, one side of which is connected to the transmission mechanism 7 , and the other side is connected to the motor shaft 42 . The specific way of connection may be the aforementioned flat square connection or spline connection. After the connection is completed, the first component and the second component are roughly arranged longitudinally in front of each other.

In step S4, the connected first assembly and second assembly are installed in the casing half-shells. As shown in Figure 36, similarly, the housing halves have positioning structures for engaging the first and second components. The positioning structure may be a positioning rib or the like. Simultaneously, the control switch for controlling the movement mode of the motor 4 is also connected to the circuit pins of the motor 4 through wires.

In step S5, as shown in FIG. 36 , splice the other shell half shell and the half shell shell in S4 along the direction of the double-headed line in the figure and connect them fixedly through the fixing element. This completes the assembly of the main body 10 of the blowing device 1 .

As shown in Figure 17 and Figure 18 is another embodiment of the blowing device, the structure of the blowing device 1 in this embodiment is basically the same as that of the blowing device shown in Figure 1 . The difference between the two embodiments is described below: In this embodiment, the first side 681 and the second side 682 of the cutting blade constituting the crushing mechanism 6 are curved in an arc shape, so that the entire cutting blade is roughly S-shaped. At the same time, the cutting blade also has a smaller cross-sectional area. In this embodiment, there is a shorter distance between the first side 681 and the corresponding second side 682 , preferably the maximum distance is less than 20 mm. The matching part 59 of the duct 5 has a regular structure, and the whole matching part 59 is similar to a funnel structure, which is composed of a cone 591 with a gradually increasing radius and a cylindrical skirt 592 at the end of the connecting cone 591 . A cooling inlet 441' is also provided in the cone 591. A safety shield 121 is also provided at the first opening 12 . The safety cover 121 is located at the longitudinal rear end of the motor cover 44 . FIG. 18 is a cross-sectional view of the blowing device in FIG. 17 . It can be seen from this figure that the transmission shaft 71 connecting the pulverizing mechanism 6 and the fan 3 passes through the duct 5 . And the transmission shaft 71 is provided with the supporting bearing 72 that plays a supporting role. The support bearing 72 is also provided with a damping element 73 . The function of the damping element 73 is to weaken the transmission of the vibration generated by the transmission shaft 71 to the duct 5 . The damping element 73 may be sleeved on a rubber ring or a rubber cap on the support bearing 72 .

As shown in FIG. 18 , the distance between the fan 3 and the stator blades 52 of the duct 5 is preferably 5 mm to 20 mm. Wherein, the distance L is defined as the longitudinal distance between the end of the stator blade 52 and the plane P formed by the rotation of the fan 3 and passing through the center of the fan 3 . The end of the stator blade 52 refers to the end of the stator blade 52 close to the fan 3 . The stator blade 52 has a certain longitudinal length, and the end of the stator blade 52 refers to the end closest to the fan 3 along the longitudinal direction. The fan 3 rotates to form a rotation plane P perpendicular to the fan axis 39. Since the fan axis 39 is arranged longitudinally, the extension direction of the rotation plane P of the fan 3 is perpendicular to the longitudinal direction, and the rotation plane P of the fan 3 passes through the center C of the fan 3. In addition, the width of the free end 36 of the blade 32 of the fan 3 is defined as the chord length d, as shown in FIG. 3 . In this embodiment, the ratio of the distance L to the chord length d is 0.3 to 1.5, which can ensure a high blowing performance of the blowing device 1 . If the ratio is less than 0.3, it means that the distance L is short, and the fan 3 is too close to the duct 5, and the performance of the fan 3 cannot be fully exerted, which is not conducive to producing a higher blowing efficiency. And if the ratio is greater than 1.5, it means that the distance L is relatively long, which means that the fan 3 is too far away from the duct 5, which is also unfavorable for high blowing efficiency. Preferably, when the ratio of the distance L to the chord length d is 0.6, the blowing efficiency is the highest. Taking the chord length d of the stationary vanes 52 as an example of 21 mm, when the distance L is 6.3 mm, that is, when the ratio is 0.3, the wind speed generated by the suction device 1 is about 42 m/s. And when the distance reaches 12.6 mm, that is, when the ratio is 0.6, the wind speed generated by the blowing device 1 is about 45 m/s. Therefore, it can be seen that with the increase of the ratio, the wind speed is increased to a certain extent, thereby improving the efficiency. And when the distance L is 18.9mm, that is, when the ratio is 0.9, the wind speed generated by the blowing device 1 is about 42m/s. It can be seen that when the ratio continues to increase, the wind speed starts to decrease instead. When the distance L is about 31.5 mm, that is, when the ratio is 1.5, the wind speed generated by the blowing and suction device 1 is at 36 m/s. It can be seen that the wind speed drops significantly, and the working efficiency is not ideal. Therefore, the best embodiment is that the ratio is about 0.6, and when the chord length of the blades 32 of the fan 3 is 21 mm, the distance L is preferably 12.6 mm, and the working efficiency is the highest at this time.

Because in the blowing mode, the duct 5 is located in the downstream area of the fan 3, the airflow blown from the fan 3 produces a rectification effect when passing through the duct 5, thereby adjusting the swirl direction of part of the airflow, reducing the generation of eddy currents, and making the overall airflow direction more clear. Neat, improve the blowing effect and efficiency of the airflow. Specifically, since the air needs to pass through the stator blades 52 of the duct 5 and the blades 32 of the fan 3 successively, the stator blades 52 and the blades 32 of the fan 3 are arranged circumferentially around the axis. In order to avoid mutual interference between the two in the circumferential direction, and ensure that there will be no overlap of blades at any phase in the circumferential direction to produce a similar resonance superposition effect, the numbers of the stator blades 52 and blades 32 are set to be mutually prime numbers. If the numbers of the stator blades 52 and the blades 32 have non-1 or non-self divisors, then the stator blades 52 and the blades 32 may have multiple phases at a certain moment, thereby generating turbulent flow similar to the resonance superposition effect, affecting the air flow stability. In this embodiment, the number of stator blades 52 is preferably 5-8. If the number of stator blades 52 is too small, for example, 4 or 3, a part of the air will pass directly through the gap between the two stator blades 52 without being guided by the stator blades 52, resulting in a local vortex. The generation of air will affect the blowing efficiency of the overall airflow. And if the number of stator blades 52 is large, such as 9 or 10, although the flow guiding effect is better, but because the stator blades 52 are too dense, the air passing area of the air passage 55 is affected, so that the gas flow is not good. Unobstructed, reducing the wind speed. In this embodiment, the number of stationary blades 52 is preferably six. The number of blades 32 of the corresponding fan 3 is 11, so that it can be ensured that the two numbers are mutually prime numbers. In another embodiment, the number of stator blades 52 is 7, and the number of blades 32 is 12. In this way, when the fan 3 is rotating, at any moment, the number of overlapping phases between the blades 32 and the stationary blades 52 is at most one.

It is also worth noting that, in order to further isolate the cooling passage and the airflow passage 55 and prevent the airflow from communicating with each other, the motor cover 44 further includes a seal 443 . The seal 443 is arranged at the transmission interface 45 of the motor housing 44 . The reason for setting the transmission interface 45 is to allow the motor shaft 42 to go out through the transmission interface 45 so as to be in transmission connection with the fan 3 . Since the radial dimension of the transmission interface 46 must be greater than the radial dimension of the motor shaft 42, there is a gap between the transmission interface 46 and the motor shaft 42, and part of the air in the airflow channel 55 outside the motor cover 44 can enter the motor through this gap. The inside of the cover 44 interferes with the independent arrangement of the air flow channel 55 and the cooling channel. As shown in the figure, a sealing member 443 is provided at the transmission interface 46 , and the sealing member 443 can isolate the airflow passage 55 from the cooling passage, preventing the airflows in the two passages from communicating with each other through the transmission interface 46 . In this embodiment, the sealing member 443 is a barrel-shaped structure. The circumferential side wall of the cylindrical structure is a solid barrel wall. Both ends in the extending direction of the cylinder arm are provided with openings. Therefore, the sealing member 443 has a barrel-shaped structure arranged through it. The motor shaft 42 passes through the hollow inside of the sealing member 443 . One end of the seal 443 is installed and connected to the transmission interface 46 , and the other end is located inside the motor cover 44 . Specifically, this end of the seal 443 is connected to the support structure 46 supporting the motor 4 . Further, the sealing member 443 abuts against the front bracket 461 of the supporting structure 46 . The front bracket 461 is provided with a support bearing 464 supporting the motor shaft 42 , and the support bearing 464 only accommodates the passage of the motor shaft 42 without clearance. Therefore, the support bearing 464 can seal the end opening of the sealing member 443 and isolate the inside of the motor cover 44 from the outside of the motor cover 44 . At the same time, the transmission effect of the motor shaft 42 will not be affected. With such a design, the airflow in the airflow channel 55 outside the motor cover 44 cannot enter the inside of the motor cover 44 due to the blocking effect of the barrel wall of the sealing member 443 and the support bearing 464 . And the airflow of the cooling channel inside the motor cover 44 cannot flow to the outside of the motor cover 44 due to the blocking effect of the barrel wall of the sealing member 443 and the support bearing 464 . Therefore, the seal 443 can ensure the independence of the air flow channel 55 and the cooling channel, prevent them from interfering with each other, and further improve the working efficiency. The structure of the sealing member 443 connecting the transmission interface 45 and the support structure 46 may be a snap-fit connection structure such as a boss, a slot, and the like.

In the embodiment shown in FIG. 19 , the blowing and suction device 1 may further include a removal mechanism for removing the duct 5 from the airflow channel, and an accommodating cavity 100 for accommodating the duct 5 . In the air blowing device 1 in which the air duct is a single duct, it is a preferred solution to set the duct 5 to be movable. The duct 5 can be selectively moved into the air flow channel 55 or removed from the air flow channel 55 . An accommodating cavity 100 which can completely accommodate the duct 5 is also preferably provided near the airflow channel 55 . After the duct 5 moves to the receiving cavity, the duct 5 leaves the airflow channel 55 completely. Thereby, the unimpeded flow of the airflow channel 55 is ensured when the air is sucked. After the duct 5 moves into the airflow channel 55, the duct 5 can guide the passing airflow when blowing. The manner in which the removal mechanism moves the duct 5 may also include translation or rotation. In a translational embodiment, the removal mechanism may comprise rails for sliding the duct 5 and controls for controlling the sliding of the duct 5 on the rails. In a rotating embodiment, the removal mechanism may comprise a clip mechanism similar to that found in a revolver. Operating the rotating mechanism can make the duct 5 rotate and shift as a whole around an axis, so that the duct 5 can be removed from the airflow channel. Also the rotating duct 5 returns to the position in the air flow channel. This axis can be located at a position other than the center of the duct 5 . And the angle of rotation may also preferably be 90 degrees, 180 degrees or the like.

In another embodiment shown in FIG. 20 , the motor 4 of the blowing device 1 is located in the motor housing 143 , and the fan axis 39 of the fan 3 and the axis 41 of the motor 4 are arranged parallel to each other. In order to realize the transmission function of the two, a transmission member 47 is additionally arranged between the motor 4 and the fan 3 . The motor 4 drives the fan 3 to rotate through the transmission member 47 . The transmission member 47 here can be a common belt or bevel gear and other elements that can change the transmission angle. The fan 3 and the motor 4 are not arranged longitudinally back and forth, but the fan 3 and the motor 4 are arranged side by side along the longitudinal direction. This makes it possible to reduce the overall longitudinal dimension of the blower device 1 and to keep the motor 4 out of the path through which the air circulates. Those skilled in the art can easily imagine that the fan axis 39 of the fan 3 and the axis 41 of the motor 4 can also be arranged at a certain angle, such as an acute angle. And the air duct 2 is the same as the previous embodiment.

In another embodiment as shown in Fig. 21, the blowing device 1' also includes an air pipe 2' and a main body 10'. The quantity of the air pipe 2' is also one. One end of the air pipe 2' is a nozzle 21', and the other end is a connector 22 for connecting the main body 10'. Different from the previous embodiment, there are at least two different connection ports on the main body 10', which are the first connection port 18 and the second connection port 19 respectively. And the connecting head 22 of the air pipe can be selectively matched with the first connecting port 18 and the second connecting port 19 . Preferably, the first connecting port 18 and the second connecting port 19 are respectively located on two sides of the fan 3' inside the main body 10'. Projections of the first connection port 18 and the second connection port 19 on a plane perpendicular to the fan axis 39' of the fan 3' are at least partially identical. After the air duct 2' is connected with the corresponding connection port, the blowing and suction device 1' will naturally switch to the corresponding working mode. For example, when the connecting head 22 of the air pipe 2' is connected to the first connection port 18 of the main body 10', the blowing device 1' is in the blowing mode. After the motor 4' starts working, the airflow produced by the fan 3' is blown out from the mouth 21' of the air duct 2' through the first connecting port 18. When the connecting head 22 of the air pipe 2' is connected to the second connection port 19 of the main body, the blowing device 1' is switched to the suction mode. After the work starts to work, the air-flow is sucked from the nozzle 21' of the air duct 2' and passes through the second connecting port 19. It is worth noting that, in this embodiment, the fan 3' does not need to change the direction of rotation in the blowing or sucking mode, and only needs to rotate in one direction all the time. The airflow channels in blow mode are not the same as those in suction mode. The fan 3' preferably includes an axial fan, a mixed flow fan, etc. capable of generating an airflow that moves along the axial direction of the fan. Of course, the main body 10' and the air duct 2' can preferably be detachably connected. When no work is needed, the main body 10' and the air duct 2' can be disassembled into two independent parts for storage separately. When work is required, the air duct 2' can be fixedly connected to one of the connection ports of the main body 10' . In another embodiment shown in Fig. 22, the air pipe 2' can be connected with the main body 10' in a form of relative rotation with the main body 10'. The main body 10' is provided with a pivot shaft 13, and the pivot shaft 13 can drive the air duct 2' to rotate around its axis to different positions. Thereby realize that air duct 2' is connected with one of the connecting ports. In this preferred embodiment, during the rotation of the air pipe 2' from the position connected to the first connection port 18 to the position connected to the second connection port 19, the rotation angle is 180 degrees. Of course, those skilled in the art can think of adopting a structure that realizes the relative linear movement of the air duct and the main body.

As shown in Figure 25 is another embodiment of the utility model. In this embodiment, the air blowing device 1 includes a first fan 310 and a second fan 320 , and both the first fan 310 and the second fan 320 are located in the main body 10 . The motor 4 is located between the first fan 310 and the second fan 320 and connected to the first fan 310 and the second fan 320 respectively. A clutch device 60 is provided between the motor shaft 42 and the first fan 31 and the second fan 32 . The main body 10 defines a first opening 260 and a second opening 270 . In this embodiment, both the outlet pipe 423 and the spiral channel 424 are disposed on the main body 10 and are disposed close to the second opening 270 of the main body 10 . In a preferred embodiment, the same air duct 430 can be used as the air blowing duct and the air suction duct. When in the blowing mode, the air duct 430 is installed in the first opening 260, the motor 4 drives the first fan 310 to work, and the airflow is blown out from the air duct. When switching to the suction mode, the air duct 430 is removed from the first opening 260 and installed on the second opening 270, the motor 4 drives the second fan 320 to work, the air is sucked from the air duct 430 and discharged from the main body 10 The outlet tube 423 is discharged.

Figure 26 is another embodiment of the present utility model. In this embodiment, an air duct 430 is still used as a blowing duct or an air suction duct. The difference from the fifth embodiment is that the blowing device 1 is provided with a pivoting device 107 connecting the air pipe and the main body 10 . The pivoting device 107 can control the position of the air duct 430 relative to the main body 10 to change. The pivoting device 107 is rotated about a pivot axis 130 . The pivoting device 107 further includes a first connecting arm 110 connected to the main body 10 and a second connecting arm 120 connected to the air duct 430 . As shown in FIG. 26 , when in the blowing mode, the air duct 430 moves to a position cooperating with the first fan 310 , and at this time the air duct 430 is used as a blowing duct. When switching to the suction mode, there is no need to disassemble the air duct, and the air duct is moved to a position cooperating with the second fan 320 through the pivoting device. At this time, the air duct 430 is used as a suction duct.

Fig. 27 is another embodiment of the present utility model. In this embodiment, an air pipe 430 is still used as a blowing pipe or an air suction pipe, and the air pipe 430 can always be fixedly connected to the main body 10 without moving when switching blowing and suction modes. The main body 10 is provided with a first fan 310 and a second fan 320 . The first fan 310 is an axial fan with axial blades and a first rotating shaft 311 . The second fan 320 is a centrifugal fan with centrifugal blades and a second rotating shaft 321 . The axial flow fan can move between the air blowing position where the motor 4 drives the axial flow fan to rotate alone and the air suction position where the motor 4 simultaneously drives the axial flow fan and the centrifugal fan. The second fan 320 is provided with an accommodating chamber 400 for accommodating the first fan 31 . The first fan 310 is located in the accommodating chamber 400 . The second fan 32 is further provided with a channel 401 communicating with the accommodating cavity 400 and the air duct 430 . A clutch device is provided between the first rotating shaft 311 of the first fan 310 and the second rotating shaft 321 of the second fan 320 and the motor shaft 42 . In the blowing mode, the motor shaft 42 is power-connected to the first rotating shaft 311 through the clutch device, and disconnected from the second rotating shaft 321 , so that the motor 4 drives the first fan 310 to rotate. The airflow generated by the first fan 310 passes through the channel of the second fan 320 and blows out from the air duct 430 . When switching to the suction mode, the motor shaft 42 is power-connected to the second rotating shaft 321 through the clutch device, and disconnected from the first rotating shaft 311 . The motor 4 can drive the second fan 32 to rotate, so as to draw air from the air duct 430 .

Figure 28 is another embodiment of the utility model. In this embodiment, the air blowing device still includes a first fan 310 and a second fan 302 . The first fan 310 is an axial fan, and the second fan 320 is a centrifugal fan. The first fan 310 is movably engaged with the second fan 302 . In the blowing mode, the first fan 310 as an axial fan works and does not cooperate with the second fan 320 . And the second fan 320 as a centrifugal fan does not work. In the suction mode, the first fan 310 moves to a position cooperating with the second fan 320 , so that the second fan 310 and the second fan 320 work together. As shown in FIG. 28 , the second fan 320 has a receiving cavity 400 , and the first fan 310 can move axially along the first rotating shaft 311 . When the first fan 310 is accommodated in the accommodation cavity 400 of the second fan 320 , the blades of the first fan 310 are aligned with the blades of the second fan 320 to form mixed flow blades. In the blowing mode, the first fan 310 works alone and generates airflow, while the second fan 320 does not work. In the suction mode, the blades of the first fan 310 and the second fan 320 are combined to form blades of a mixed flow fan, so that the first fan 310 and the second fan 320 form a mixed flow fan as a whole. The motor 4 drives the first fan 310 and the second fan 320 to work together, so that the mixed flow fan rotates to generate airflow.

In another embodiment shown in Fig. 23 and Fig. 24, the blowing device 1' also includes an air duct 2' and a main body 10'. The quantity of the air pipe 2' is also one. Different from the previous embodiment, the two ports located at both ends of the air duct 2' can be selectively connected to the main body 10'. For the convenience of description, the two ports of the air duct 2' are respectively the first port 23 and the second port 24. Preferably only one connection port 25 is provided on the main body 10'. By connecting different ports of the air duct 2' to the main body 10', the blowing device switches the working mode accordingly. For example, after the first port 23 of the air duct is connected with the connecting port 25 on the main body 10', at this moment, the second port 24 is used as the free end of the air duct 2', and the blowing and suction device 1' is in the blowing mode. After the motor 4' drives the fan 3' to work, the airflow is blown out from the second port 24 of the air duct 2'. After the second port 24 of the air pipe 2' is connected with the connecting port 25 of the main body 10', the first port 23 of the air pipe 2' is used as the free end of the air pipe again, and the suction device 1' is in the suction mode. After the motor 4' drives the fan 3' to work, the airflow is sucked into the main body 10' from the first port 23 of the air duct 2'. Of course, in this embodiment, the fan also preferably includes an axial flow fan, a mixed flow fan, etc. capable of generating airflow moving along the axial direction of the fan. Unlike the previous embodiment, the fan 3' can rotate in two different directions. In the blowing mode, the fan 3' rotates in a first direction, and in the suction mode, the fan 3' rotates in a second direction. It is particularly worth noting that, in this embodiment, the air duct is preferably not a straight duct, but varies in thickness. The air duct 2' is approximately tapered, and the radius of the first port 23 is larger than that of the second port 24, so that the cross-sectional area of the first port 23 is larger than that of the second port 24. In this way, in the blowing mode, the airflow blown out from the second port 24 with a smaller cross-sectional area can obtain a higher wind speed and improve the effect of blowing. However, in the suction mode, suction is sucked from the first port 23 with a larger cross-sectional area, which can prevent foreign matter from clogging the port and affecting the suction effect. Certainly, in order to enable the connecting port 25 of the main body 10' to be connected to air duct ports of different thicknesses, the connecting port 25 has a first connecting portion 26 matching the first port 23 and a second connecting portion 27 matching the second port 24. In this embodiment, the connection port 25 preferably has a stepped structure like a step or a tapered structure like a funnel. That is to say, the first connecting portion 26 and the second connecting portion 27 cooperate to form a circumferential stepped structure or a tapered structure with a gradually changing radius. It is also worth noting that due to the different positions of the connecting ports of the air pipes, the effective lengths of the air pipes 2' in different modes of blowing and suction also vary. The effective length is the distance from the connection port to the free end of the duct.

In another embodiment as shown in FIG. 37 , the blowing device 1 also includes a main body 10 and an air pipe 2 detachably connected to the main body 10 . The main body 10 is also provided with a first opening 12 . An airflow generating device is provided inside the main body 10 for generating airflow. When the blowing device 1 is in the blowing mode, driven by the air flow generating device, air enters the main body 10 from the first opening 12 and is blown out from the air pipe 2 connected to the main body 10 . When the blowing and suction device 1 is switched to the suction mode, the air together with the leaves and dust enters from the air pipe 2 and is discharged from the first opening 12 under the drive of the airflow generating device. Certainly, the first opening 12 can be disposed at different positions of the main body 10 . In this embodiment, the airflow generating device includes a counter-rotating axial flow mechanism 500 and a motor 501 for driving the counter-rotating axial flow mechanism 500 . The counter-rotating axial flow mechanism 500 includes at least one pair of axial flow fans. The pair of axial flow fans can generate airflows moving in different directions, and the airflows moving toward the air duct 2 are generated in the blowing mode, and the airflows moving toward the first opening 12 are generated in the suctioning mode. The pair of axial flow fans in the counterrotating axial flow mechanism 500 are arranged close to each other so as to generate counterrotating effects between them. The pair of axial flow fans includes a first axial flow fan 502 and a second axial flow fan 503 . The distance between the first axial fan 502 and the second axial fan 503 is between 0.01 times the diameter of the axial fan and 0.5 times the diameter of the axial fan. Both the first axial fan 502 and the second axial fan 503 can rotate around their respective rotation axes. In this embodiment, the rotation axes of the first axial fan 502 and the second axial fan 503 coincide, that is, the first axial fan 502 and the second axial fan 503 rotate around the same rotation axis. In the embodiment of the present utility model, the first axial fan 502 and the second axial fan 503 are always driven to rotate at the same time. Further, the first axial fan 502 and the second axial fan 503 rotate in opposite directions. That is, when the first axial fan 502 rotates clockwise, the second axial fan 503 rotates counterclockwise. And when the first axial fan 502 rotates counterclockwise, the second axial fan 503 rotates clockwise. Due to the anti-rotation effect of the first axial flow fan 502 and the second axial flow fan 503, the airflow passing through the rotary axial flow mechanism 500 always keeps moving along the direction of the rotation axis.

The first axial fan 502 and the second axial fan 503 have several blades arranged circumferentially around the rotation axis. As shown in FIG. 38 , the blades of the first axial flow fan 502 rotate in the direction of arrow AA' in the figure, that is, counterclockwise. The rotation direction of the blades of the second axial flow fan 503 is along the direction of the arrow BB' in the figure, that is, clockwise. Therefore, the rotation directions of the blades of the first axial fan 502 and the second axial fan 503 are exactly opposite. As shown in FIG. 39 , when the airflow passes through the first axial fan 502 , the airflow always deviates away from the axis due to the rotation of the blades of the axial fan. When the deviated airflow passes through the second axial fan 503 , due to the opposite direction of rotation of the second axial fan 503 , the airflow moves closer to the axis again. Therefore, the airflow passing through the two-stage axial flow fan can ensure to move along the direction of the rotation axis, so in this embodiment, the blowing device 1 does not need to be provided with a duct mechanism to guide the flow. And because there is no duct mechanism, in the suction mode, the air together with the particulate matter such as leaf dust directly pass through the counter-rotating axial flow mechanism 500 in the main body 10 without passing through an additional crushing mechanism, thereby improving the passing efficiency of the particulate matter.

In order to enable the motor 501 to drive the first axial fan 502 and the second axial fan 503 to rotate simultaneously, in the embodiment shown in FIG. The transmission device 504 of the axial flow fan 503 . The transmission device 504 is connected with the motor 501 on the one hand, and can simultaneously drive the first axial fan 502 and the second axial fan 503 to rotate in opposite directions. As shown in FIG. 40 , the transmission device 504 includes a connecting shaft 505 connected to the motor 501 , a first gear set 506 connected to the first axial fan 502 , and a second gear set 507 connected to the second axial fan 503 . Both the first gear set 506 and the second gear set 507 are engaged with the connecting shaft 505 for transmission. The first gear set 506 and the second gear set 507 have different transmission meshing directions and are in transmission connection with the connecting shaft 505 . Therefore, when the connecting shaft 505 is driven by the motor 501 to rotate, it can drive the first gear set 506 and the second gear set 507 to rotate in opposite directions, so that the first axial flow fan 502 and the second axial flow fan 503 simultaneously rotate in opposite directions. direction to turn. The blowing device 1 also includes a supporting device 508 supporting the connecting shaft 505 . The support device 508 includes a bracket structure. In this embodiment, it can be seen that there is one motor 501 . In the blowing mode, the user controls the motor 501 to rotate in the first direction. Driven by the transmission device 504, the first axial fan 502 rotates clockwise and the second axial fan 503 rotates counterclockwise, so the entire counterrotating axial flow mechanism 500 generates an airflow blown out to the air duct 2. In the suction mode, the user controls the motor 501 to rotate in the second direction opposite to the first direction, then through the transmission device 504, the first axial fan 502 rotates counterclockwise while the second axial fan 503 rotates clockwise, Therefore, the entire counter-rotating axial flow mechanism 500 generates the airflow sucked from the air duct 2 .

In the embodiment shown in FIG. 41 , the blowing device 1 also has a counter-rotating axial flow mechanism 500 including a first axial flow fan 502 and a second axial flow fan 503 . The difference is that the motor 501 includes a first motor 509 and a second motor 510 that are set separately. The first motor 509 is separately connected to the first axial fan 502 and used to drive the first axial fan 502 to rotate. The second motor 510 is separately connected to the second axial fan 503 and used to drive the second axial fan 503 to rotate. The blowing device 1 also includes a control mechanism 511 for controlling the first motor 509 and the second motor 510 . The control mechanism 511 controls the first motor 509 and the second motor 510 to rotate in opposite directions, thereby driving the first axial fan 502 and the second axial fan 503 to rotate in opposite directions. The control mechanism 511 can drive two motors in the form of a PCB board. In this embodiment, there are at least two motors 501 . In one of the embodiments, as shown in FIG. 42 , the negative pole of the first motor 509 and the positive pole of the second motor 510 are connected in parallel to the electrical terminal at one end of the control mechanism 511, and the positive pole of the first motor 509 is connected to the positive pole of the second motor 510 in parallel. The negative pole of the motor 510 is connected in parallel to the electrical terminal at the other end of the control mechanism 511 . When the control mechanism 511 moves to the first position where the circuit is turned on, the first motor 509 and the second motor 510 rotate in opposite directions exactly at the same time. And when the control mechanism 511 moves to the second position where the circuit is turned on, the first motor 509 and the second motor 510 change their rotation direction at the same time, so the first motor 509 and the second motor 510 still maintain the opposite direction.

In addition, those skilled in the art can imagine that the counter-rotating axial flow mechanism 500 can also be used in a hair dryer that can only perform the blowing function, so as to improve the performance of axial blowing.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model.

Claims (11)

1. a suction and blowing device, including:

Housing, has the first opening that connection is extraneous；

Airduct, connects described housing and has the mouth of pipe that connection is extraneous；

Motor, is used for producing rotary power；

Fan, is driven around fan axis by described motor and rotates to produce air-flow；

It is characterized in that: described fan can rotate in different directions around a fan axis, thus produce the described air-flow moved along different directions.

Suction and blowing device the most according to claim 1, it is characterised in that: under described suction and blowing device is in blowing mould formula, described fan rotates clockwise around described fan axis；Under described suction and blowing device is in blowing mould formula, described fan is around described fan axis along rotating counterclockwise.

Suction and blowing device the most according to claim 2, it is characterised in that: described fan includes aerofoil fan, and the air-flow moving direction that described aerofoil fan produces is parallel to described fan axis direction.

Suction and blowing device the most according to claim 2, it is characterised in that: the fan axis of described fan extends through described first opening.

Suction and blowing device the most according to claim 1, it is characterised in that: described motor is controllably around motor drive shaft along rotating clockwise and counterclockwise, and when being rotated in a clockwise direction, described motor drives described fan to rotate along described first direction；When rotating in the counterclockwise direction, described motor drives described fan to rotate along described second direction.

Suction and blowing device the most according to claim 5, it is characterised in that: described suction and blowing device also includes the control switch controlling described motor direction of rotation, and described control switch selectively controls described motor and rotates clockwise or counterclockwise.

Suction and blowing device the most according to claim 6, it is characterised in that: having the handle for gripping on described housing, described control switch is arranged on described handle.

Suction and blowing device the most according to claim 7, it is characterized in that: described control switch has at least 3 operating positions, at the first operating position, motor described in described control on-off control is rotated in a clockwise direction, at the second operating position, the described switch that controls cuts out described motor and rotates, and at the 3rd operating position, motor described in described control on-off control rotates in the counterclockwise direction.

Suction and blowing device the most according to claim 8, it is characterised in that: described suction and blowing device also includes the described safety switch controlling switch that links, and when described safety switch is triggered, described control switch could rotate by described motor.

Suction and blowing device the most according to claim 9, it is characterised in that: described housing also has the interface connecting described airduct, and when described airduct connects described interface, described safety switch is triggered.

11. suction and blowing devices according to claim 2, it is characterised in that: described fan includes that mixed flow fan, described mixed flow fan can produce the air-flow moved along fan axis bearing of trend.