CN203279986U - Handheld type blower - Google Patents
Handheld type blower Download PDFInfo
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- CN203279986U CN203279986U CN2013201554320U CN201320155432U CN203279986U CN 203279986 U CN203279986 U CN 203279986U CN 2013201554320 U CN2013201554320 U CN 2013201554320U CN 201320155432 U CN201320155432 U CN 201320155432U CN 203279986 U CN203279986 U CN 203279986U
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- 230000005484 gravity Effects 0.000 claims description 5
- 238000007664 blowing Methods 0.000 abstract description 32
- 238000013461 design Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000011449 brick Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 210000003205 muscle Anatomy 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 210000003813 thumb Anatomy 0.000 description 1
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Abstract
A handheld type blower comprises a shell body, a handle, a battery and an air blowing tube. An air inlet and a passage assembly are arranged on the shell body. The passage assembly comprises a passage connected with the shell body, a motor and a fan, wherein the motor and the fan are arranged in the passage. The shell body is connected to the air blowing tube through the passage assembly. The battery is arranged on the shell body. When the handheld blower is operated with largest air volume, the ratio between the air volume and input power is larger than or equal to 0.7cfm/w. Consequently, the air blowing efficiency of the blower is higher, and the requirements of users can be met to a greater degree.
Description
Technical field
The present invention relates to a kind of garden type electric tool, particularly a kind of hand blower.
Background technology
The hand-held DC blower is mainly used in blowing ground, court and grandstand neighbouring fallen leaves and small-sized rubbish.In order to blow afloat rubbish slightly heavy in a large amount of fallen leaves in ground and some cracks, usually need the air quantity of hand blower larger, and in the market power brick is installed to hand-held DC blower on housing due to the limitation of Duct design, cause hair-dryer complete machine air-out efficiency lower, the air quantity of hair-dryer is less, can not meet user's requirement.
Summary of the invention
The object of the present invention is to provide a kind of high efficiency hand blower.
For reaching above-mentioned purpose, the invention provides a kind of hand blower, comprise housing, handle, battery and blower, be provided with air inlet and Yi Gehan road assembly on described housing, described letter road assembly comprises and is connected the De Han road with housing and is installed to motor and fan in the letter road, and described housing is connected on blower by letter road assembly, and described battery is arranged on housing, when described hand blower moved with maximum quantity of wind, the ratio of described air quantity and input power was more than or equal to 0.7cfm/w.
Further, defined a central axis on described blower, along the direction of axis the rear end of fan near the flow cross section in the air channel at air inlet position greater than blower on the area of flow cross section at air outlet position, form a circulating face between described inner walls and fan hub, the ratio on blower between the flow cross section of the flow cross section at air outlet position and fan present position circulating face is more than or equal to 0.8.
Further, described fan is to outer contour of air channel definition of air outlet section, and the angle of described central axis and described outer contour is less than or equal to 8 degree.
Further, the cross-sectional area at described blower air outlet position is greater than 4300mm2.
Further, the capacity of described battery is between 170wh-400wh.
Further, described motor is brshless DC motor, and described fan is aerofoil fan, and the diameter of described brshless DC motor is less than or equal to 35mm.
Further, described aerofoil fan comprises the wheel hub and a plurality of blade that is installed on wheel hub that are installed on electric machine rotational axis, and the external diameter of described aerofoil fan is between 85mm-140mm.
Further, the ratio of described hand-held blow fan delivery and brshless DC motor diameter is greater than 12cfm/mm.
Further, described housing include air feed circulation to sweep, described handle is arranged on the sweep of housing.
Further, described housing ,Han road assembly and blower roughly are located along the same line, described blower has defined a central axis in the longitudinal direction, described handle comprises grip part, described grip part distributes in the both sides on the whole plane, center of gravity place of hair-dryer, described plane parallel is in described axis, and vertical with work ground.
The air quantity of hand blower of the present invention and the ratio of input power are not less than 0.7cfm/w, so the blowing efficiency of complete machine is improved.
Description of drawings
Fig. 1 is the perspective view of the hand blower in embodiment of the present invention;
Fig. 2 is the front view after the hand blower in embodiment of the present invention removes partial shell;
Fig. 3 is the front view of the hand blower in embodiment of the present invention;
Fig. 4 is the top view of the hand blower in embodiment of the present invention;
Fig. 5 is the structural representation that the air intake He Yuhan road assembly of the hand blower in embodiment of the present invention connects;
Fig. 6 is the structural representation of the handle of the hand blower in embodiment of the present invention;
Fig. 7 is the cutaway view of the hand blower De Han road assembly in embodiment of the present invention;
Fig. 8 is the stereogram after the hand blower De Han road assembly in embodiment of the present invention removes part letter road and tube connector;
Fig. 9 is the curve of the hand blower fan blade external diameter in embodiment of the present invention and the efficiency function relation of drying.
The specific embodiment
For clearer understanding technology contents of the present invention, especially exemplified by the specific embodiment and coordinate appended illustrate as follows.
Please refer to Fig. 1 and Fig. 2, hand blower 10 as embodiment of the present invention, comprise housing 11, air intake box 12, handle 13, Control Component 14, battery 15,Han road assembly 17 and blower 19, letter road assembly 17 and battery 15 corresponding both sides that are positioned at housing 11 respectively wherein, handle 13 is arranged on housing 11, housing 11 is connected with blower 19 by letter road assembly 17, and air intake box 12 is positioned at housing 11 inside.
Please also refer to Fig. 3, housing 11 includes container cavity 110, installation portion 111, main air inlet 112, auxiliary air inlet 113, sidepiece air inlet 114 and sweep 115, container cavity 110 is formed in housing 11, air intake box 12 is arranged on container cavity 110 Zhong，Han road assembly 17 1 ends and is fixedly mounted in installation portion 111.Main air inlet 112 and auxiliary air inlet 113 all are arranged on the bottom of housing 11, sidepiece air inlet 113 is arranged on the sidewall of housing 11, air-flow enters by main air inlet 112 or auxiliary air inlet 113, flows into letter road assembly 17 from installation portion 111 after the guiding of sweep 115.Sidepiece air inlet 114 has the effect of auxiliary air intake, can play better air inlet effect, certainly also can not need sidepiece air inlet 114.
please refer to Fig. 5, air intake box 12 includes bottom air inlet section 120, inlet section, rear portion 121, sidepiece inlet section 122 and air outlet 123, wherein bottom air inlet section 120 is the rail shape structure with inlet section, rear portion 121, and a ramp structure corresponding with sweep 115 on housing 11 is arranged in inlet section, rear portion 121, the air intake of the air outlet 123Yu Han road assembly 17 of air intake box 12 (figure is mark not) connects, air intake box 12Yu Han road assembly this moment 17 unit 18 that can work independently of formation, bottom air inlet section 120 on the air intake box, inlet section, rear portion 121, sidepiece inlet section 122 forms a plurality of blowing passages with air outlet 123 respectively, therefore no matter how housing 11 changes, can pack in housing and form the blowing passage in unit 18 as long as can work independently, machine just can be realized blowing function.Can, in the situation that the internal work unit is constant, change fast the external form of hand blower in this way.In embodiments of the present invention, main air inlet 112 on housing 11 has formed the first blowing passage together with the blowing bottom air inlet section 120 of box 12 and air outlet 123, auxiliary air inlet 113 on housing 11 has formed the second blowing passage together with the blowing inlet section, rear portion 121 of box 12 and air outlet 123, form the 3rd blowing passage together with the sidepiece inlet section 122 of the sidepiece air inlet 114 on housing and blowing box 12 and air outlet 123.
Please also refer to Fig. 1, Fig. 2, Fig. 4 and Fig. 6, handle 13 is used for gripping hand blower 10, it is positioned at the top of housing 11 and battery 15 and is arranged on the sweep 115 of housing 11, handle 13 comprises grip part 130, battery installation section 131 and speed governing section 132, and wherein grip part 130 is between battery installation section 131 and speed governing section 132.
In embodiment of the present invention, alongst defined an axis L 1 on blower 19, the center of gravity G of hair-dryer integral body is positioned on a plane P 1, and plane P 1 is vertical with the ground P2 of work, and is simultaneously parallel with axis L1.Housing 11, battery 15,Han road assembly 17 and blower 19 roughly are located along the same line, and the grip part 130 on handle 13 is distributed in the both sides of above-mentioned plane P 1, preferably grip part 130 symmetries are distributed in plane P 1 both sides.Compact conformation, near the centroidal distance grip part, reduced and in use overcome the power that the hand blower deflection needs like this, increases hand-held comfort level, reduces hand-held sense of fatigue in long-time use procedure.Battery can certainly be arranged on above or below housing 11, housing 11,Han road assembly 17 and blower 19 roughly are located along the same line, grip part 130 on handle 13 is distributed in the both sides of plane, center of gravity place (figure is mark not), described plane is parallel with the axis of blower 19, and vertical with work ground P2, above-described work ground is defined as a horizontal plane.
Be provided with battery snap close 1311 on battery installation section 131, battery snap close 1311 is used for battery 15 is locked at housing 11, on battery snap close 1311, interlock is provided with button release 1312, separate with battery 15 by the drive battery snap close 1311 of pressing or promote button release 1312 linkages, then battery 15 is ejecting under an effect of 116 and can disassemble easily.Certainly, battery installation section 131 also can be arranged on housing 11, as long as can play when battery 15 is installed the function that it is locked on the battery mounting base that arranges on housing 11.
please refer to Fig. 7 and Fig. 8, letter road assembly 17 comprises the tube connector 170 that is connected with blower 19, De Han road 171 is connected with housing 11, and motor 172 and fan 173, motor 172 is connected with the trigger 140 on Control Component 14 by wire, the mutual clamping in tube connector 170Yu Han road 171, be provided with the support ring 174 that holds motor 172 in tube connector 170Yu Han road 171, motor 172 is arranged in support ring 174, fan 173 is connected with the output shaft of motor 172, the interior all one-body molded wind-guiding muscle 175 that some divergent shapes are arranged in tube connector 170Ji Han road 171, wind-guiding muscle 175 1 ends are connected on the inwall in tube connector 170Huo Han road 171, the other end is connected on support ring 174, wherein be provided with the passage 176 that power supply machine 172 wires pass at least one wind-guiding muscle 175.So not only increased the reliability of wire location but also reduced windage, and not increased new part, during assembling, fixing cord is simple, reliable, convenient.Be understandable that,, if letter road 171 length are enough, also can not pass through tube connector 170, directly support ring 174 and wind-guiding muscle 175 are set on letter road 171.Letter road 171 has an inlet section 1711, in order to reduce the noise at 1711 places, inlet section, letter road, inlet section, letter road 1711 is arranged for ease of the lip limit structure of wind-guiding, and above-mentioned lip limit structure is can Yu Han road 171 integrally formed or form independent part and be installed on letter road 171.
In embodiment of the present invention, fan 173 is aerofoil fan, motor 172 is brshless DC motor, fan 173 is driven by motor 172, it comprises a wheel hub 1731 that is installed on electric machine rotational axis (figure is mark not), a plurality of blades 1732 that are installed on above-mentioned wheel hub 1731, its Leaf 1732 can be one-body molded with wheel hub 1731, can be also to be assembled into together after separately being shaped.
Please refer again to Fig. 3, for the ease of carrying, also be provided with the braces (not shown) on hand blower of the present invention, the braces two ends are connected respectively to two the lanyard holes 118,119 that are arranged on housing 11, two lanyard holes 118,119 substantially the same to the distance at 130 centers, grip part, and the mid point of two lanyard holes 118,119 position lines be positioned at the machine gravity line near.
The hand-held DC blower is mainly used in blowing ground, court and grandstand neighbouring fallen leaves and small-sized rubbish, obtain through investigation,, in order to blow afloat the rubbish in a large amount of fallen leaves in ground and some cracks, usually need the air quantity of hand blower preferably to be greater than 395cfm.The limitation that the aspect such as power brick is arranged on hand-held DC blower on housing little and hair-dryer complete machine air-out efficiency is lower due to battery capacity in the market, cause hair-dryer to be difficult to reach air quantity greater than 395cfm, the working time is greater than the performance indications of 5min.Therefore,, in order to reach larger air quantity and higher blowing efficiency, need to parameter and the Duct design of battery capacity, brshless DC motor, aerofoil fan be optimized.
In order to reach desirable airflow value and the working time, the capacity of battery is usually greater than 170wh, generally the capacity of battery is directly proportional to the weight of itself, for hand blower, due to the weight requirement to complete machine, the preferable range of power brick capacity between 170wh-400wh,, if such setting is because the power brick capacity is too little on the one hand, can not meet the requirement of air quantity and working time; And if the power brick capacity is too large on the other hand, in use hand-held sense of fatigue can increase, and is unfavorable for that the operator works long hours.
Table 1 has been listed battery capacity when 200wh and 300wh, the effective time of hand blower when maximum quantity of wind operation and the operation of minimum air quantity.Also can find out from table 1, regularly, air quantity and working time are inversely proportional to battery capacity one, that is to say that air quantity is larger, and the working time is shorter.According to ergonomics, and by a large amount of simulated experiment analyses of bearing usage degree to complete machine weight, people, draw, the performance parameter that is fit to the hand-held direct current hand blower of popular client's instructions for use is: air quantity is between 385cfm-700cfm, and the working time is between 20min-75min.
Table 1
| Battery capacity | Maximum quantity of wind | Minimum air quantity |
| 200wh | 36min | 120min |
| 300wh | 54min | 180min |
, in the situation that battery capacity is certain,, in order to obtain the hand-held direct current hand blower of an air quantity greater than 395cfm, higher blowing efficiency, also need parameter and the Duct design of brshless DC motor, aerofoil fan are optimized.
Please refer again to Fig. 7 and Fig. 8, motor 172 is received in the support ring 174 that arranges on letter road 171 and tube connector 170, the wheel hub 1731 of aerofoil fan 173 is installed on the rotating shaft (figure is mark not) of motor 172, according to aerodynamic principle, for reducing windage, improve wind speed, the outline of radome fairing 177, wheel hub 1731 and support ring 174 be designed to one streamlined, so motor 172 diameter have also determined the diameter of wheel hub 1731 simultaneously.In addition, when the design aerofoil fan, the ratio of the root diameter (RD) of blade and top diameter, being the fan hub diameter and the ratio of blade external diameter, below being called for short hub ratio, is a very important parameter, same impeller outer diameter, wheel hub leaflet length of a film is more suitable for the axial flow blower of low pressure and mass flow, and between 0.25-0.45, the air-out efficiency of fan blade is higher through the sunykatuib analysis hub ratio.If therefore motor diameter is larger, corresponding hub diameter also can be larger, for the hub ratio parameter is remained in optimum interval, thereby obtain higher air-out efficiency, the corresponding increase of the diameter of blade, and then cause letter road volume to increase, the volume of complete machine also increases, and is that the operational comfort in configuration design or actual use procedure all can affect adversely like this, and therefore preferred motor diameter is not more than 35mm, overall mass is lighter like this, takes up space less.Scope according to hub ratio, can further draw the scope of blade external diameter between 78mm-140mm, blowing efficiency is higher like this, as shown in Figure 9, C1 and C2 are respectively air quantity when 560cfm and 500cfm, curve map through functional relation between analogue simulation modeling analysis gained blade external diameter and blowing efficiency, the blade external diameter is when 85mm-140mm as seen from the figure, blowing efficiency is best, and the blowing definitions of efficiency here is the merit of air current flow generation and the ratio that fan blade is rotated the merit that consumes.
Further, less than 35mm, the ratio of air quantity and motor diameter, greater than 12cfm/mm, is therefore compared with common hand blower due to the diameter of motor, and the hand blower in the present invention obtains more powerful blowing effect by the motor of small size.
below Duct design of the present invention is described in detail, please refer again to Fig. 2, direction along axis L1, the rear end of fan 173 near the flow cross section S1 in the air channel at air inlet 112 positions greater than blower 19 on the flow cross section S3 at air outlet 191 positions, and form an annular circulating face (figure is mark not) between Zai Han road 171 inwalls and fan hub 1731, ratio between the flow cross section S2 of the flow cross section S3 at air outlet 191 positions on blower 19 and aerofoil fan 173 present positions annular circulating faces more preferably greater than or equal 0.8, like this effective airflow characteristic that improves is set, improve blowing efficiency.Simultaneously fan 173 is to outer contour L2 of 191 sections air channels definition of air outlet, and L1 and L2 have defined an angle.Preferably, angle between axis L1 and outer contour L2 is less than 8 degree, and arranging like this is because angle is larger forms certain windage to air-flow, and the air flow losses of wind path wall increases like this, in blower 19, the loss of the high velocity air of circulation increases, and causes the blowing Efficiency Decreasing of complete machine.By the optimization of above two parameters, can realize favourable air current flow situation simultaneously in the less pressure loss of the interior realization of blower 19, effectively improve blowing efficiency.
In order at air outlet 191 places, to reach enough air outputs, through the CFD(computational fluid dynamics) analyze and the test data summary, usually design larger air outlet place area, preferred, the cross-sectional area at air outlet 191 positions is set to greater than 4300mm2.Certainly, along with the increase wind speed of blowing area can decrease, through the preferred air outlet area of practical operation is set to 4300mm
2To 8000mm
2
The optimization of the parameter designing by the battery capacity in the present invention, brshless DC motor, aerofoil fan and the improvement of Duct design, when battery capacity is between 170wh-400wh, more than the air quantity of hand blower all can reach 395cfm, particularly when air quantity, during at 430-700cfm, still can meet the working time greater than 5min.In the time of simultaneously can guaranteeing that hair-dryer moves with maximum quantity of wind, the ratio of air quantity and input power is more than or equal to 0.7cfm/w, and blowing efficiency is very significantly improved.
Although the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (10)
1. hand blower, comprise housing, handle, battery and blower, be provided with air inlet and Yi Gehan road assembly on described housing, described letter road assembly comprises and is connected the De Han road with housing and is installed to motor and fan in the letter road, described housing is connected on blower by letter road assembly, described battery is arranged on housing, it is characterized in that: when described hand blower moved with maximum quantity of wind, the ratio of described air quantity and input power was more than or equal to 0.7cfm/w.
2. hand blower according to claim 1, it is characterized in that: defined a central axis on described blower, along the direction of axis the rear end of fan near the flow cross section in the air channel at air inlet position greater than blower on the area of flow cross section at air outlet position, form a circulating face between described inner walls and fan hub, the ratio on blower between the flow cross section of the flow cross section at air outlet position and fan present position circulating face is more than or equal to 0.8.
3. hand blower according to claim 2 is characterized in that: described fan is to outer contour of air channel definition of air outlet section, and the angle of described central axis and described outer contour is less than or equal to 8 and spends.
4. hand blower according to claim 2, it is characterized in that: the cross-sectional area at described blower air outlet position is greater than 4300mm2.
5. hand blower according to claim 1, it is characterized in that: the capacity of described battery is between 170wh-400wh.
6. hand blower according to claim 1, it is characterized in that: described motor is brshless DC motor, and described fan is aerofoil fan, and the diameter of described brshless DC motor is less than or equal to 35mm.
7. hand blower according to claim 6, it is characterized in that: described aerofoil fan comprises the wheel hub and a plurality of blade that is installed on wheel hub that are installed on electric machine rotational axis, and the external diameter of described aerofoil fan is between 85mm-140mm.
8. hand blower according to claim 6, it is characterized in that: the ratio of institute's hand-held blow fan delivery and brshless DC motor diameter is greater than 12cfm/mm.
9. hand blower according to claim 1 is characterized in that: described housing include the air feed circulation to sweep, described handle is arranged on the sweep of housing.
10. hand blower according to claim 1, it is characterized in that: described housing ,Han road assembly and blower roughly are located along the same line, described blower has defined a central axis in the longitudinal direction, described handle comprises grip part, described grip part distributes in the both sides on the whole plane, center of gravity place of hair-dryer, described plane parallel is in described axis, and vertical with work ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201554320U CN203279986U (en) | 2013-03-29 | 2013-03-29 | Handheld type blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201554320U CN203279986U (en) | 2013-03-29 | 2013-03-29 | Handheld type blower |
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| CN203279986U true CN203279986U (en) | 2013-11-13 |
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| CN2013201554320U Withdrawn - After Issue CN203279986U (en) | 2013-03-29 | 2013-03-29 | Handheld type blower |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671175A (en) * | 2013-12-31 | 2014-03-26 | 常州格力博有限公司 | Axial-flow blower |
| CN104074157A (en) * | 2013-03-29 | 2014-10-01 | 南京德朔实业有限公司 | Handheld hair drier |
| CN104433134A (en) * | 2014-11-27 | 2015-03-25 | 桂林电子科技大学 | Silencing, energy-saving and radiation preventing electric hair drier |
| CN104757767A (en) * | 2015-04-03 | 2015-07-08 | 浙江壹尊电器科技股份有限公司 | hand held hair dryer |
| CN106105798A (en) * | 2016-02-22 | 2016-11-16 | 常州格力博有限公司 | A kind of operate handle and the backpack hair-dryer with this operation handle |
| CN110236280A (en) * | 2018-03-08 | 2019-09-17 | 南京德朔实业有限公司 | A kind of hair dryer |
-
2013
- 2013-03-29 CN CN2013201554320U patent/CN203279986U/en not_active Withdrawn - After Issue
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074157A (en) * | 2013-03-29 | 2014-10-01 | 南京德朔实业有限公司 | Handheld hair drier |
| CN104074157B (en) * | 2013-03-29 | 2016-02-10 | 南京德朔实业有限公司 | Hand blower |
| CN103671175A (en) * | 2013-12-31 | 2014-03-26 | 常州格力博有限公司 | Axial-flow blower |
| CN103671175B (en) * | 2013-12-31 | 2016-08-03 | 常州格力博有限公司 | Axial-flow blower |
| CN104433134A (en) * | 2014-11-27 | 2015-03-25 | 桂林电子科技大学 | Silencing, energy-saving and radiation preventing electric hair drier |
| CN104757767A (en) * | 2015-04-03 | 2015-07-08 | 浙江壹尊电器科技股份有限公司 | hand held hair dryer |
| CN104757767B (en) * | 2015-04-03 | 2018-02-02 | 浙江壹尊电器科技股份有限公司 | hand held hair dryer |
| CN106105798A (en) * | 2016-02-22 | 2016-11-16 | 常州格力博有限公司 | A kind of operate handle and the backpack hair-dryer with this operation handle |
| CN106105798B (en) * | 2016-02-22 | 2023-08-22 | 格力博(江苏)股份有限公司 | An operating handle and a knapsack hair dryer with the operating handle |
| CN110236280A (en) * | 2018-03-08 | 2019-09-17 | 南京德朔实业有限公司 | A kind of hair dryer |
| CN110236280B (en) * | 2018-03-08 | 2023-12-12 | 南京泉峰科技有限公司 | a hair dryer |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20131113 Effective date of abandoning: 20160210 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |