CN111457457A - electric heater - Google Patents

Abstract

The invention relates to an electric heater, comprising: a casing, a first air inlet and a first air outlet are opened on the casing, the casing has a first air duct connected between the first air inlet and the first air outlet, and the casing has The top surface, the first air outlet is opened on the top surface; the heating element assembled in the first air duct, the heating element is used to heat the gas entering the first air duct from the first air inlet when it is energized; and the fans are all assembled on the casing and the air guide element, the fan communicates with the air guide element and is used for blowing the air flow to the air guide element to drive the hot air flowing out from the first air outlet to blow out from the side of the casing. Under the action of the fan and the deflector, the hot air flowing from the first air outlet is blown out from the side of the casing, and the blown hot air flows along the side of the casing for a certain distance and then floats up, so as to avoid the hot air from the first air outlet located on the top surface of the casing. An air outlet is directly discharged and then floated up, which improves the heat transfer rate in the area where people move.

Description

electric heater

technical field

The invention relates to the technical field of heating equipment, in particular to an electric heater.

Background technique

In order to improve the environment and reduce the environmental pollution caused by coal-fired heating, more and more cities vigorously promote the "coal-to-electricity" project and encourage the use of electric heating technology for heating.

Electric heaters are generally based on natural convection heat transfer and radiation heat transfer. Natural convection heat transfer uses the density difference of cold and hot gases as power to drive indoor air circulation, thereby adjusting indoor temperature. It is absorbed by the clothes you wear, and the heating effect of the human body is good, and it is highly efficient and energy-saving.

However, during the heating process of traditional electric heaters, due to the direct rise of natural convection gas, the convection heat is directly transported to the top of the room, while the heat transfer rate in the local activity area of people (the area close to the side of the electric heater at a certain distance) is slow, resulting in heat The utilization efficiency is low, and the thermal comfort of the human body is poor.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide an electric heater that can improve the heat utilization rate in view of the problem of low heat utilization rate of traditional electric heaters.

An electric heater, comprising:

a casing, a first air inlet and a first air outlet are opened on the casing, the casing has a first air duct connected between the first air inlet and the first air outlet, and the casing has a top surface, the first air outlet is opened on the top surface;

a heating element assembled in the first air duct, the heating element is used to heat the gas entering the first air duct from the first air inlet when power is applied; and

A fan and a flow guide are both assembled on the casing, the fan communicates with the flow guide for blowing airflow to the flow guide to drive the hot air flowing out of the first air outlet from the The sides of the casing are blown out.

The above-mentioned electric heater, under the action of the fan and the deflector, makes the hot air flowing out from the first air outlet blown out from the side of the casing, and the blown hot air flows along the lateral direction of the casing for a certain distance and then floats up, so as to prevent the hot air from being located in the casing. The first air outlet on the top surface is directly discharged and then floated up, which improves the heat transfer rate in the personnel activity area, thereby improving the utilization rate of heat and human comfort.

In one embodiment, the fan communicates with the outside, and is used for sucking in the outside air and blowing the outside air toward the air guide.

In one embodiment, the housing further has an assembly cavity, and the fan is assembled in the assembly cavity.

In one embodiment, the housing includes a body and an air intake grille, the air intake grille is assembled on the body and defines the assembly cavity with the body, and the fan passes through the air intake The grille is communicated with the outside, and the fan is used for sucking in the outside air and blowing the outside air toward the air guide.

In one embodiment, the assembly cavity and the first air duct are not communicated with each other.

In one embodiment, a second air inlet and a second air outlet are formed on the air guide member, and a second air outlet that communicates with the second air inlet and the second air outlet is formed in the air guide member. road;

Wherein, the second air inlet is communicated with the fan, the second air outlet is communicated with the first air outlet, and the airflow blown out from the second air outlet drives the hot air flowing out from the first air outlet Blow out from the side of the casing.

In one embodiment, the flow guide is a plate-like structure, the flow guide has a first end and a second end connected to each other, the second end extends toward the first end and partially overlaps on the inside of the first end;

Wherein, the second air inlet is formed at one end of the air guide member close to the fan, the first end and the second end are surrounded to form the second air duct, and the second end overlaps The second air outlet is formed between the inner part of the first end and the first end.

In one embodiment, the inner side of the second end forms a first flow guide curved surface, the first flow guide curved surface is adjacent to the second air outlet, and is used for guiding the air flow in the second air duct to the The second air outlet is discharged.

In one embodiment, the second air duct has a closed end and an open end that communicate with each other, the open end communicates with the second air outlet, and the closed end is far away from the first air outlet relative to the open end. Two air outlet settings;

Wherein, the difference between the cross-sectional area of the open end minus the cross-sectional area of the second air outlet is greater than the first preset threshold, so that the flow velocity of the air blown out from the second air outlet is greater than the second preset threshold so that the Negative pressure is formed outside the air guide.

In one embodiment, the cross-sectional area of the second air outlet gradually decreases from an end close to the open end to an end away from the open end.

In one embodiment, a side of the air guide member facing the first air outlet forms a second air guide surface, and the second air guide surface includes a first sub air guide surface and a second air guide surface that are connected to each other. A sub-air guide surface, the first sub-air guide surface is adjacent to the second air outlet, and the first sub-air guide surface is inclined relative to the second air outlet toward the side away from the first air outlet , one end of the second sub-guiding surface away from the first sub-guiding surface is parallel to the horizontal direction.

In one embodiment, the air outlet direction of the second air outlet is set toward the first air outlet, and the air outlet axis of the second air outlet is between the air outlet axis of the first air outlet and the air outlet axis of the first air outlet. Tilt setting.

In one embodiment, the second air duct has a closed end and an open end that communicate with each other, the open end communicates with the second air outlet, and the closed end is far away from the first air outlet relative to the open end. Two air outlet settings;

Wherein, the cross-sectional area of the open end is larger than the cross-sectional area of the closed end.

In one of the embodiments, the electric heater has a first working mode and a second working mode;

Wherein, in the first working mode, the heating element is turned on and the fan is turned off; in the second working mode, the heating element is turned on and the fan is turned on.

In one embodiment, the housing further includes a bottom surface and a side surface connected between the top surface and the bottom surface, and the first air inlet is opened on the bottom surface and/or the side surface.

In one embodiment, the first air inlet includes a first sub-air inlet and a second sub-air inlet, the first sub-air inlet is opened on the bottom surface, and the second sub-air inlet is opened on the bottom surface side;

Wherein, the heating element is used for radiative heat transfer, and the second sub-air inlet is also used as a heat radiation port.

In one embodiment, the housing includes a body and a radiation grid, the radiation grid is assembled on the body, and the heat radiation port is formed on the radiation grid.

Description of drawings

1 is a cross-sectional view of a section of an electric heater provided by an embodiment of the present invention;

Fig. 2 is the partial structure diagram of the electric heater shown in Fig. 1;

Fig. 3 is the axonometric view of the electric heater shown in Fig. 1;

4 is a cross-sectional view of another section of the electric heater shown in FIG. 1;

Fig. 5 is the exploded view of the partial structure of the electric heater shown in Fig. 1;

Fig. 6 is the enlarged view of A place of the electric heater shown in Fig. 2;

Fig. 7 is the partial structure diagram of the electric heater shown in Fig. 1;

Fig. 8 is the enlarged view of B place of the electric heater shown in Fig. 4;

Fig. 9 is the structural diagram of the guide member of the electric heater shown in Fig. 1;

Fig. 10 is the flow vector diagram of the hot air of the electric heater shown in Fig. 1 in the first working mode;

FIG. 11 is a vector diagram showing the flow of hot air of the electric heater shown in FIG. 1 in the second working mode.

100, electric heater; 10, shell; 11, the first air inlet; 111, the first sub air inlet; 112, the second sub air inlet; 12, the first air duct; 13, the first air outlet; 14, the top face; 15, bottom surface; 161, first side surface; 17, body; 18, radiation grille; 19, air inlet grille; 110, assembly cavity; 20, heating element; 21, heating plate; 30, fan; 31, Chassis; 311, the first air inlet; 312, the first air outlet; 32, the body; 40, the air guide; 41, the second air inlet; 42, the second air outlet; 43, the second air duct; 431, closed end; 432, open end; 44, first end; 45, second end; 46, first diversion surface; 47, second diversion surface; 471, first sub diversion surface; 472, first Two sub-diversion surface.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Referring to FIG. 1 , an embodiment of the present invention provides an electric heater 100 for heating gas when energized, and the heated gas flows into the room by convection for heating needs of users. The electric heater 100 includes a casing 10 and a heating element 20. The heating element 20 is disposed in the casing 10 for heating gas when energized, and the heated gas flows into the room by convection to meet the user's heating needs.

The casing 10 is provided with a first air inlet 11 (see FIG. 2 ) and a first air outlet 13 (see FIG. 3 ). The casing 10 has a first air inlet connected between the first air inlet 11 and the first air outlet 13 . The duct 12 (refer to FIG. 4 ), the heating element 20 is arranged in the first air duct 12 . In this way, the heating element 20 communicates with the outside through the first air inlet 11 and the first air outlet 13 , and the outside air enters the first air duct 12 through the first air inlet 11 and exchanges heat with the heating element 20 and flows out from the first air outlet 13 .

Continuing to refer to FIG. 3, the housing 10 has a top surface 14, a bottom surface 15 and a side surface (not marked) connected between the top surface 14 and the bottom surface 15, and the first air inlet 11 is opened on the bottom surface 15 and/or the side surface of the housing 10, The first air outlet 13 is opened on the top surface 14 of the casing 10 . In this specific embodiment, the first air inlet 11 is opened on the bottom surface 15 and the side surface of the casing 10 . Through the above arrangement, the outside cold air enters the first air duct 12 from the first air inlet 11 located on the bottom surface 15 and the side surface of the casing 10 , and after being heated by the heating element 20 , flows from the first air outlet 13 located on the top surface 14 of the casing 10 . Outflow to facilitate the entry of cold air and the discharge of hot air.

The casing 10 is a hollow cuboid structure, and the sides of the casing 10 include a first side 161 (refer to FIG. 2 ), a second side (not shown), a third side (not shown) and a fourth side connected to each other. (not shown), the first side surface 161 is arranged opposite to the third side surface, and the second side surface is arranged opposite to the fourth side surface. Specifically, the area of the first side surface 161 and the third side surface is larger than that of the second side surface and the fourth side surface, and the first air inlet 11 is opened on the bottom surface 15 , the first side surface 161 and the third side surface.

Since one side of the casing 10 faces the human body under normal use, this side is defined as the front side, the side opposite to this side is the rear side, and the other two sides are the left and right sides. In the following, the first side 161 faces the human body as an example for detailed description. At this time, the side of the housing 10 with the first side 161 is the front side, the side with the third side is the rear side, and the side with the second side is the left side. side, the side with the fourth side is the right side.

Continue to refer to FIG. 2 , specifically, the first air inlet 11 includes a first sub air inlet 111 and a second sub air inlet 112 , the first sub air inlet 111 is opened on the bottom surface 15 of the housing 10 , and the second sub air inlet 112 is opened on the first side 161 and the third side of the casing 10 . Wherein, the heating element 20 is used for radiative heat transfer, and the second sub-air inlet 112 is also used as a heat radiation port. That is, the heating element 20 can adopt both radiative heat transfer and convective heat transfer, and it radiates heat to the outside through the second sub-air inlet 112 (the air inlet can either enter the air or radiate heat to the outside), and directly transfer the radiant heat to the human body. , rapidly increase the body temperature.

Further, the heating element 20 may be one of a mica electric heating film, a silicon crystal electric heating film, a carbon crystal heating plate and a high emissivity coating aluminum alloy heating plate. The surface of the heating element 20 is made of high emissivity material, and the surface emissivity is greater than or equal to 0.8. The higher the surface emissivity of the heating element 20 is, the more far-infrared heat is radiated outward through the second sub-air inlet 112, and the far-infrared heat can be directly transferred to the human body On clothing or human body, the temperature of human clothing or human body surface can be quickly increased, and the far-infrared heating effect can be improved, and far-infrared radiation can promote human blood circulation, which is beneficial to human health.

Referring to FIG. 5 , the heating element 20 includes a plurality of heating sheets 21 , the plurality of heating sheets 21 are parallel to each other, and the inclination angle a of the plurality of heating sheets 21 and the longitudinal direction of the casing 10 is 0°-45°. It should be understood that in other embodiments, the arrangement of the heating element 20 is not limited to this, for example, the heating element 20 may include a single heating sheet 21, or the heating element 20 may include multiple heating sheets 21, and the multiple heating sheets 21 are opposite to each other. The inclination angle a in the longitudinal direction of the casing 10 is different.

Continuing to refer to FIGS. 2 and 3 , in one embodiment, the housing 10 includes a body 17 and a radiation grid 18 , the radiation grid 18 is assembled on the body 17 , and the heat radiation ports are formed on the radiation grid 18 . The shape of the openings of the radiation grid 18 may be circular, square, diamond or racetrack. Since the higher the aperture ratio of the radiation grid 18, the more far-infrared heat radiated from the heating element 20, and the better the human body heating effect, the aperture ratio of the radiation grid 18 can be set to be greater than or equal to 50%.

Continuing to refer to FIG. 2 , the electric heater 100 further includes a fan 30 and a guide member 40 . The fan 30 and the guide member 40 are both assembled on the casing 10 , and the fan 30 communicates with the guide member 40 for blowing airflow to the guide member 40 . , the airflow blown by the guide member 40 is guided by the guide member 40 and then drives the hot air flowing out from the first air outlet 13 to be blown out from the side of the casing 10 .

In the electric heater 100 provided in this embodiment, under the action of the fan 30 and the deflector 40 , the hot air flowing out from the first air outlet 13 is blown out from the side of the casing 10 , and the blown hot air flows along the lateral direction of the casing 10 for a certain amount of time. It floats up after the distance, so as to prevent the hot air from being directly discharged from the first air outlet 13 located on the top surface 14 of the casing 10 and then float up, which improves the heat transfer rate in the personnel activity area, thereby improving the utilization rate of heat and human comfort.

In one embodiment, the electric heater 100 has a first working mode and a second working mode. In the first working mode, the heating element 20 is turned on and the fan 30 is turned off; in the second working mode, the heating element 20 is turned on and the fan 30 is turned on. By setting the electric heater 100 with the first working mode and the second working mode, different needs of users can be met.

When the user needs to sleep, in order to reduce the noise generated by the fan 30, the first working mode of the electric heater 100 can be turned on. At this time, the hot air generated by the electric heater 100 is directly discharged from the first air outlet 13; when the user needs to quickly heat At this time, the second working mode of the electric heater 100 can be turned on. At this time, the fan 30 works and blows the air flow to the guide 40 to drive the hot air flowing out from the first air outlet 13 to blow out from the side of the casing 10, which can quickly improve the human body. The temperature of the active area improves the utilization of heat.

The electric heater 100 further includes a controller (not shown), the heating element 20 and the fan 30 are both electrically connected to the controller, and the controller controls the cooperative operation of the heating element 20 and the fan 30 .

In one embodiment, the fan 30 is communicated with the outside world, and is used to inhale the outside air and blow the outside air to the guide member 40 , and the airflow blown to the guide member 40 is guided by the guide member 40 and is driven to flow out from the first air outlet 13 The hot air is blown out from the side of the casing 10 . In this way, the outside air is mixed with the hot air flowing out from the first air outlet 13 and then blown out from the side of the casing 10 , the temperature of the gas blown out from the side of the casing 10 is slightly lower than the temperature of the hot air directly flowing out from the first air outlet 13 , thereby achieving the effect of reducing the temperature of the gas blown out from the heater and ensuring the comfort of the human body.

It should be understood that, in other embodiments, the fan 30 can also directly inhale the hot air discharged from the interior of the electric heater 100 and blow the hot air to the guide member 40 . The hot air flowing out from the first air outlet 13 is driven to blow out from the side of the casing 10 . In some other embodiments, the fan 30 can also suck in the mixed gas of the outside air and the hot air discharged from the electric heater 100 at the same time, and blow the mixed gas to the guide member 40, and the airflow blown by the guide member 40 passes through the guide member 40 drives the hot air flowing out of the first air outlet 13 to blow out from the side of the casing 10 after the diversion, which is not limited here.

Continuing to refer to FIG. 2 , in one embodiment, the casing 10 further has an assembly cavity 110 , the assembly cavity 110 is opened on the second side or the fourth side of the casing 10 , and the fan 30 is assembled in the assembly cavity 110 . It can be understood that, in other embodiments, the housing 10 may also omit the assembly cavity 110 , which is not limited herein.

Further, in order to ensure that the air sucked by the fan 30 is the outside air, the assembly cavity 110 and the first air duct 12 are not communicated with each other.

Continuing to refer to FIG. 3 , further, the housing 10 includes a main body 17 and an air intake grille 19 . The air intake grille 19 is assembled on the main body 17 and defines the assembly cavity 110 with the main body 17 . The fan 30 passes through the air intake grille 19 and External connection. It can be understood that, in other embodiments, the air inlet grill 19 may also be omitted, and the fan 30 is directly communicated with the outside world, which is not limited herein.

The shape of the opening of the air inlet grille 19 may be circular, square, diamond or racetrack, which is not limited herein. The larger the opening ratio of the grille, the smaller the air inlet resistance and the greater the air volume of the fan 30. In order to ensure the air volume of the fan 30, the opening ratio of the air inlet grille 19 is set to be greater than or equal to 50%.

The above-mentioned fan 30 sucks the outside air from the air inlet grille 19 and blows the outside air to the guide member 40, and the gas blown into the guide member 40 is guided through the guide member 40 to drive the hot air flowing out from the first air outlet 13 from the casing 10. blown out from the front side.

Referring to FIG. 6 , in one embodiment, the air guide 40 is provided with a second air inlet 41 and a second air outlet 42 , and the air guide 40 has a second air inlet 41 and a second air outlet 42 in the air guide 40 . Air duct 43. The second air inlet 41 is communicated with the fan 30 , and the second air outlet 42 is communicated with the first air outlet 13 . The fan 30 inhales the outside air from the air inlet grille 19 and blows the outside air from the second air inlet 41 into the second air duct 43 of the guide 40, and flows from the second air duct 43 to the second air outlet 42 and blows out from the second air duct 43. The gas blown out from the second air outlet 42 drives the hot air flowing out from the first air outlet 13 to be blown out from the front side of the casing 10 together.

It should be understood that, in other embodiments, the air guide member 40 may also be provided in other ways, for example, the air guide member 40 omits the second air inlet 41 , the second air outlet 42 and the second air duct 43 , but is provided with It is an arc-shaped deflector or a linear deflector structure, which is not limited here.

Continuing to refer to FIG. 2 , the fan 30 includes a casing 31 and a body 32 , the body 32 is disposed in the casing 31 , and the casing 31 has a first air inlet end 311 and a first air outlet end 312 (refer to FIG. 7 ) that are connected to each other, The first air outlet end 312 is butted with the air guide member 40 , so that the body 32 is communicated with the second air inlet 41 of the air guide member 40 . Specifically, the fan 30 may be a centrifugal fan, a mixed flow fan, a turbo fan or an axial flow fan, as long as the air flow can be blown by the guide member 40 , which is not limited herein.

Further, the length of the air guide 40 is disposed across the entire first air duct 12 , that is, along the line connecting the left and right sides of the housing 10 , and the length of the air guide 40 is equal to the length of the first air duct 12 .

Specifically, the second air duct 43 is formed by butting the air guide 40 with the body 17 of the housing 10 , that is, a part of the air duct wall of the second air duct 43 is formed on the housing 10 . It should be understood that, in other embodiments, all the air duct walls of the second air duct 43 are formed on the air guide member 40, which is not limited herein.

Referring to FIGS. 8 and 9 , the deflector 40 is a plate-like structure. The deflector 40 has a first end 44 and a second end 45 connected to each other. The second end 45 extends toward the first end 44 and partially overlaps the first end 44 . On the inner side of one end 44, the second air inlet 41 is formed at one end of the air guide 40 close to the fan 30, the first end 44 and the second end 45 are surrounded to form a second air duct 43, and the second end 45 overlaps the first end 45. A second air outlet 42 is formed between a portion of the inner side of the end 44 and the first end 44 .

Further, the air guide 40 passes through along the line connecting the left side and the right side of the casing 10 . At this time, the first end 44 , the second end 45 and the casing 10 of the air guide 40 are surrounded to form a second air duct 43 . The second end 45 overlaps the inner portion of the first end 44 , and the second air outlet 42 is formed between the first end 44 and the housing 10 .

It can be understood that, in other embodiments, the air guide 40 may also be set to not pass through along the connecting line between the left side and the right side of the housing 10, and the first end 44 and the second end 45 are directly surrounded to form a second air flow. The second air outlet 42 is directly formed between the portion of the channel 43 , the second end 45 overlapping the inner side of the first end 44 and the first end 44 , which is not limited herein.

It can also be understood that the formation of the second air inlet 41, the second air outlet 42 and the second air duct 43 is not limited to this. Both the two air outlets 42 and the second air duct 43 are directly opened on the air guide 40 , which is not limited here.

Continuing to refer to FIG. 8 , in one embodiment, the second air duct 43 has a closed end 431 and an open end 432 that communicate with each other. The air outlet 42 is provided. The cross-sectional area of the open end 432 is larger than the cross-sectional area of the closed end 431 , so that when the air flows to the open end 432 , since the cross-sectional area of the open end 432 is larger, the uniformity of the air flow can be increased.

The difference between the cross-sectional area of the open end 432 minus the cross-sectional area of the second air outlet 42 is greater than the first preset threshold, so that the flow velocity of the air blown out from the second air outlet 42 is greater than the second preset threshold to prevent the flow guide 40 A negative pressure is formed outside, and the hot air flowing out of the first air outlet 13 is sucked into the air flow out of the second air outlet 42 under the action of the negative pressure, and together with the air flow out of the second air outlet 42, the hot air flows out of the front of the casing 10. side discharge.

Specifically, the cross-sectional area of the second air outlet 42 gradually decreases from the end close to the open end 432 to the end far away from the open end 432, so as to further increase the flow velocity of the air flowing out of the second air outlet 42 and form a larger negative pressure , so as to inhale the hot air flowing out from the first air outlet 13 .

In a specific embodiment, the width of the second air outlet 42 is 0.8mm-2mm. If the direction from the left side to the right side of the housing 10 is defined as the first direction, in the first direction, the second air outlet 42 and the The lengths of the second air ducts 43 are equal, and the dimension of the second air outlet 42 along the second direction perpendicular to the first direction is 0.8 mm-2 mm. It can be understood that, in other embodiments, the width of the second air outlet 42 is not limited.

Referring to FIG. 9 , the inner side of the second end 45 of the air guide 40 forms a first air guide surface 46 , and the first air guide surface 46 is adjacent to the second air outlet 42 for guiding the airflow in the second air duct 43 to the second air outlet 42 to be discharged.

Continuing to refer to FIG. 4 , further, the air outlet direction of the second air outlet 42 is disposed toward the first air outlet 13 , and the air outlet axis of the second air outlet 42 and the air outlet axis of the first air outlet 13 are arranged obliquely. It should be understood that, in other embodiments, the air outlet axis of the second air outlet 42 may also be set to be perpendicular to the air outlet axis of the first air outlet 13 , which is not limited herein.

Continuing to refer to FIGS. 8 and 9 , in one embodiment, the side of the air guide member 40 facing the first air outlet 13 forms a second air guide surface 47 , and the second air guide surface 47 includes first sub-guide surfaces connected to each other. The flow surface 471 and the second sub-flow guide surface 472 , the first sub-flow guide surface 471 is adjacent to the second air outlet 42 , and the first sub-flow guide surface 471 faces away from the first air outlet 13 relative to the second air outlet 42 . One side is inclined, and one end of the second sub-guiding surface 472 away from the first sub-guiding surface 471 is parallel to the horizontal direction.

Through the above arrangement, the airflow ejected from the second air outlet 42 can form a negative pressure and suck in the hot air flowing out from the first air outlet 13. The tendency of the surface of an object to flow. When there is surface friction between the fluid and the surface of the object it flows through (also known as fluid viscosity), as long as the curvature is not large, the fluid will flow along the surface of the object. The first sub-guiding surface 471 flows to the second sub-guiding surface 472, and flows out from the second sub-guiding surface 472, and the air flow is relatively stable; flow distance. And because the end of the second sub-guiding surface 472 away from the first sub-guiding surface 471 is parallel to the horizontal direction, it is ensured that the air flow is discharged from the front side of the housing 10 in the horizontal direction. The air flow discharged from the direction travels farther in the horizontal direction, which further improves the utilization rate of heat.

The working principle of the electric heater 100 provided by the embodiment of the present invention is as follows:

In the first working mode:

When the electric heater 100 is turned on, the heating element 20 generates heat, and the heating element 20 can radiate heat from the second air inlet 112 to the outside. At the same time, the indoor air flows into the electric heater 100 from the first sub-air inlet 111 and the second sub-air inlet 112 , and exchanges heat with the heating element 20 to form hot air flowing out from the first air outlet 13 . After the hot air flows out from the first air outlet 13, it flows to the top of the electric heater 100 under the action of buoyancy, and at the same time, the surrounding air is entrained for thermal diffusion. , to heat the entire indoor space during sleep.

In the second working mode:

When the electric heater 100 is turned on, the heating element 20 generates heat, the fan 30 is turned on, and the heating element 20 can radiate heat from the second air inlet 112 to the outside. The indoor air flows into the electric heater 100 from the first sub-air inlet 111 and the second sub-air inlet 112 , and exchanges heat with the heating element 20 to form hot air flowing out from the first air outlet 13 . At the same time, the fan 30 sucks indoor air from the air inlet grille 19 , and blows the indoor air from the second air inlet 41 of the air guide 40 into the second air duct 43 of the air guide 40 , and the wind pressure of the fan 30 acts on the air. The bottom is sprayed out from the second air outlet 42 of the air guide 40 at a high speed, and the spray speed is fast, forming a negative pressure, and under the action of the second guide surface 47, a larger negative pressure is generated. Under the action of the above-mentioned negative pressure, the hot air discharged from the first air outlet 13 is sucked into the air flow discharged from the second air outlet 42, and then directly enters into the air under the action of the second sub-guiding surface 472 after the two air streams meet. personnel activity area. The intersection of the two beams not only increases the flow rate, but also makes the area where people move quickly heat up, and the air supply distance increases, which improves the utilization rate of heat and improves the comfort of the human body.

Referring to FIGS. 10 and 11 , compared with the first working mode, in the second working mode, the hot air flows farther to the front side of the housing 10 , and the heating range of the front side of the electric heater 100 is larger. For example, at a distance of 0.8m from the front side of the electric heater 100 and a height of 0.8m from the ground, the temperature in the second working mode is 21.9°C, and the temperature in the first working mode is 17.5°C. At a position 1.2m away from the front side of the electric heater 100 and 0.8m above the ground, the temperature in the second working mode is 17.3°C, and the temperature in the first working mode is 17.1°C.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (17)

1. an electric heater, is characterized in that, comprises: A casing (10), the casing (10) is provided with a first air inlet (11) and a first air outlet (13), and the casing (10) has a connection between the first air inlet (11) and the The first air duct (12) between the first air outlets (13), the casing (10) has a top surface (14), and the first air outlet (13) is opened on the top surface (14) ; A heating element (20) assembled in the first air duct (12), the heating element (20) is used for heating to enter the first air duct (12) from the first air inlet (11) when powered on ); and A fan (30) and a flow guide (40) both assembled on the casing (10), the fan (30) communicates with the flow guide (40) for directing the flow guide (40) The airflow is blown to drive the hot air flowing out from the first air outlet (13) to be blown out from the side of the casing (10). 2 . The electric heater according to claim 1 , wherein the fan ( 30 ) communicates with the outside, and is used for sucking in the outside air and blowing the outside air toward the air guide ( 40 ). 3 . 3 . The electric heater according to claim 1 , wherein the housing ( 10 ) further has an assembly cavity ( 110 ), and the fan ( 30 ) is assembled in the assembly cavity ( 110 ). 4 . 4. The electric heater according to claim 3, characterized in that, the housing (10) comprises a main body (17) and an intake grill (19), and the intake grill (19) is assembled on the The assembly cavity (110) is defined on and with the body (17) to form the assembly cavity (110), and the fan (30) communicates with the outside through the air inlet grill (19). Inhaling the outside air and blowing the outside air toward the guide member (40). 5 . The electric heater according to claim 3 , wherein the assembly cavity ( 110 ) and the first air duct ( 12 ) are not communicated with each other. 6 . 6. The electric heater according to any one of claims 1-5, wherein a second air inlet (41) and a second air outlet (42) are opened on the air guide (40), so that the A second air duct (43) that communicates with the second air inlet (41) and the second air outlet (42) is formed in the air guide (40); Wherein, the second air inlet (41) communicates with the fan (30), the second air outlet (42) communicates with the first air outlet (13), and the second air outlet (42) communicates with the first air outlet (13). ) blowing out the air flow to drive the hot air flowing out from the first air outlet (13) to blow out from the side of the casing (10). 7 . The electric heater according to claim 6 , wherein the air guide ( 40 ) is a plate-like structure, and the air guide ( 40 ) has a first end ( 44 ) and a first end ( 44 ) that are connected to each other. Two ends (45), the second end (45) extends toward the first end (44) and partially overlaps the inner side of the first end (44); Wherein, the second air inlet (41) is formed at one end of the air guide (40) close to the fan (30), and the first end (44) and the second end (45) are surrounded by The second air duct (43) is formed, and the second end (45) is overlapped between the inner part of the first end (44) and the first end (44) to form the second Air outlet (42). 8 . The electric heater according to claim 7 , wherein a first flow guiding curved surface ( 46 ) is formed on the inner side of the second end ( 45 ), and the first flow guiding curved surface ( 46 ) and the The second air outlet (42) is adjacent to the second air outlet (42) for guiding the air flow in the second air duct (43) to be discharged from the second air outlet (42). 9 . The electric heater according to claim 6 , wherein the second air duct ( 43 ) has a closed end ( 431 ) and an open end ( 432 ) that communicate with each other, and the open end ( 432 ) is connected to The second air outlet (42) is in communication, and the closed end (431) is disposed away from the second air outlet (42) relative to the open end (432); Wherein, the difference between the cross-sectional area of the open end (432) minus the cross-sectional area of the second air outlet (42) is greater than a first preset threshold, so that the airflow blown out from the second air outlet (42) The flow rate of is greater than the second preset threshold to form a negative pressure outside the flow guide (40). 10 . The electric heater according to claim 9 , wherein the second air outlet ( 42 ) has a section from an end close to the open end ( 432 ) to an end away from the open end ( 432 ). 11 . area gradually decreases. 11. The electric heater according to claim 6, characterized in that a second air guiding surface (47) is formed on the outer side of the air guiding member (40) facing the first air outlet (13), so that a second air guiding surface (47) is formed. The second guide surface (47) includes a first sub-guide surface (471) and a second sub-guide surface (472) that are connected to each other, and the first sub-guide surface (471) and the second outlet surface (471) are connected to each other. The air outlets (42) are adjacent to each other, the first sub-air guide surface (471) is inclined relative to the second air outlet (42) toward the side away from the first air outlet (13), and the second sub-air guide surface (471) is inclined toward the side away from the first air outlet (13). One end of the guide surface (472) away from the first sub-guide surface (471) is parallel to the horizontal direction. 12. The electric heater according to claim 6, wherein the air outlet direction of the second air outlet (42) is set toward the first air outlet (13), and the second air outlet ( The air outlet axis of 42) and the air outlet axis of the first air outlet (13) are arranged obliquely. 13. The electric heater according to claim 6, wherein the second air duct (43) has a closed end (431) and an open end (432) that communicate with each other, and the open end (432) is connected to The second air outlet (42) is in communication, and the closed end (431) is disposed away from the second air outlet (42) relative to the open end (432); Wherein, the cross-sectional area of the open end (432) is larger than the cross-sectional area of the closed end (431). 14. The electric heater according to claim 1, wherein the electric heater has a first working mode and a second working mode; Wherein, in the first working mode, the heating element (20) is turned on, and the fan (30) is turned off; in the second working mode, the heating element (20) is turned on, and the fan (30) is turned on. 30) On. 15. The electric heater according to claim 1, wherein the housing (10) further comprises a bottom surface (15) and a side surface connected between the top surface (14) and the bottom surface (15) , the first air inlet (11) is opened on the bottom surface (15) and/or the side surface. 16. The electric heater according to claim 15, wherein the first air inlet (11) comprises a first sub-air inlet (111) and a second sub-air inlet (112), the first sub-air inlet (112) The air inlet (111) is opened on the bottom surface (15), and the second sub-air inlet (112) is opened on the side surface; Wherein, the heating element (20) is used for radiation heat transfer, and the second sub-air inlet (112) is also used as a heat radiation port. 17. The electric heater according to claim 16, wherein the housing (10) comprises a main body (17) and a radiation grid (18), and the radiation grid (18) is assembled on the main body (18). 17), the heat radiation port is formed on the radiation grid (18).

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