CN110973801A

CN110973801A - Hand-held blowing device

Info

Publication number: CN110973801A
Application number: CN201911347956.8A
Authority: CN
Inventors: 俞浩
Original assignee: Dreame Technology Shanghai Co Ltd
Current assignee: Dreame Technology Shanghai Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-04-10

Abstract

The application relates to handheld blowing equipment, including the portion of gripping, with the work portion that the portion of gripping is connected and introduce outside air current extremely the subassembly that induced drafts of work portion, the work portion is in including being formed with the dryer shell and the fixed setting of cavity just be used for control in the cavity the circuit board of the subassembly that induced drafts, the work portion have the air intake and with the air outlet of air intake intercommunication, the circuit board is close to the air intake sets up. The circuit board is arranged close to the air inlet, and the circuit board is cooled by partial air flow at the air inlet so as to achieve the purpose of rapid cooling, so that the process is simple and the cost is low.

Description

Hand-held blowing device

Technical Field

The invention relates to handheld air blowing equipment, and belongs to the technical field of electric tools.

Background

The hair dryer is a small personal care household appliance capable of quickly drying hair, and the air can be heated by the heating wires, so that the hair can be dried more quickly. In the hair dryer in the prior art, the heat dissipation of the MOS tube is performed by adding a heat dissipation plate on the device body. However, the cost of adding the heat sink on the MOS tube body is high, and the process is complex when the circuit board is produced.

Disclosure of Invention

The invention aims to provide handheld air blowing equipment, which is characterized in that a circuit board is arranged close to an air inlet, partial air flow at the air inlet is utilized to dissipate heat of the circuit board so as to achieve the purpose of rapid cooling, and the handheld air blowing equipment is simple in process and low in cost.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a handheld blowing equipment, including the portion of gripping, with the work portion that the portion of gripping is connected and introduce outside air current extremely the subassembly that induced drafts of work portion, the work portion is in including the dryer shell that is formed with the cavity and fixed the setting just is used for control in the cavity the circuit board of subassembly that induced drafts, the work portion have the air intake and with the air outlet of air intake intercommunication, the circuit board is close to the air intake sets up.

Furthermore, the air suction assembly is arranged in the holding portion, and the air inlet is formed in the circumferential surface of the air duct shell and communicated with the holding portion.

Further, the hand-held blowing device further comprises a guide for guiding a portion of the air flow to the circuit board.

Further, the guide is connected with the grip portion.

Furthermore, the holding part comprises a holding outer shell with a hollow part and a holding inner shell arranged in the hollow part, and one end of the guide piece is connected with the holding inner shell and is obliquely arranged from one side far away from the circuit board to one side close to the circuit board.

Further, the guide piece is arranged in the cavity and above the air inlet.

Further, the air suction assembly is arranged in the cavity, and the air inlet is formed in one side of the air duct shell.

Further, the circuit board comprises an MOS tube, and the MOS tube is arranged close to the air inlet.

The invention has the beneficial effects that: the flow channel in the handheld blowing equipment is optimized, the circuit board is arranged close to the air inlet, partial airflow at the air inlet is utilized to dissipate heat of the circuit board so as to achieve the purpose of rapid cooling, the process is simple, and the cost is low;

the guide piece is arranged and used for guiding part of air flow to the circuit board, so that the air flow guiding device is more accurate and convenient;

the layout of components on the circuit board is adjusted, so that the MOS tube is arranged close to the air inlet, and partial air flow at the air inlet dissipates heat of the MOS tube.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a hand-held blowing apparatus of the present invention.

Fig. 2 is a schematic structural view of the grip portion in fig. 1.

Fig. 3 is a partial structure diagram of the holding part in fig. 1.

Fig. 4 is another partial structure diagram of the holding part in fig. 1.

Fig. 5 is a partial structural view of fig. 1.

Fig. 6 is a schematic structural view of the working portion of fig. 1.

Fig. 7 is a schematic structural view of the working portion and the tuyere structure in fig. 1.

Fig. 8 is a partial structural view of the working portion of fig. 1.

Fig. 9 is an exploded view of the working portion of fig. 1.

Fig. 10 is a cross-sectional view of fig. 1.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 to 10, a handheld blowing device 100 according to a preferred embodiment of the present invention can be used in a hair drying scene; or, the local drying, heating and physical therapy scenes are performed in the aspects of laboratories, physical therapy rooms, industrial production, art designing and the like, and the application scenes of the handheld blowing device 100 are not limited in the application. In the present embodiment, the handheld blowing device 100 is a high-speed hair dryer, and the handheld blowing device 100 may include the following components: the air suction device comprises a holding part 1, a working part 2 connected with the holding part 1 and an air suction assembly 14 used for introducing external air flow into the working part 2, wherein the working part 2 is provided with an air inlet 26 and an air outlet 27, and the holding part 1 is connected with the air inlet 26.

As described above, the air suction assembly 14 includes the motor 141 and the fan, and the motor 141 and the fan may be integrally provided; alternatively, the device may be detachably disposed, which is not limited in this embodiment. The motor 141 is a high-speed motor or the like.

Referring to fig. 2 to 4, the grip portion 1 has a first end 11 connected to the working portion 2 and a second end 12 away from the working portion 2 for air intake. The second end 12 is penetrated by a cable 4 for supplying power to the hand-held blowing device 100 as a whole. The end of the cable 4 remote from the second end 12 is provided with a plug (not shown in the figures) which can provide an electrical connection to a mains power supply or a battery pack.

The cable 4 includes a live wire and a neutral wire. Alternatively, the cable 4 is divided into at least two wires inside the grip 1 after one wire penetrates the second end 12.

The grip portion 1 includes a grip outer shell 13 formed with a hollow portion to protect components inside the grip portion 1, and a grip inner shell 15 disposed inside the hollow portion, wherein the grip outer shell 13 extends from the working portion 2 to an end of the second end portion 12 away from the working portion 2. The cable 4 enters the grip 1 through the grip housing 13 at the location of the second end 12. The cable 4 is positioned substantially in the middle of the second end 12, extending towards the inner centre of the grip 1. Illustratively, the grip portion 1 has a tubular structure as a whole and has a substantially uniform diameter. Of course, the grip portion 1 may have other shapes, and this embodiment is not limited thereto. Alternatively, in order to ensure stability when the user uses the hand-held blowing apparatus 100, the grip portion 1 portion of the grip housing 13 may be provided with an anti-slip member; alternatively, the material of the grip portion 1 of the grip case 13 is an anti-slip material.

The holding portion 1 is further provided with a first touch control assembly 5, and the first touch control assembly 5 is used for receiving a first touch control operation to adjust a working state of the handheld blowing device 100. Such as: and adjusting the on-off state of the handheld blowing equipment 100 according to the first touch operation. Optionally, the first touch component 5 may be implemented as a button component (i.e., a touch component implemented based on physical keys), a touch display screen component (i.e., a touch component implemented based on virtual keys), or the like, and the implementation manner of the first touch component 5 is not limited in this embodiment.

Of course, other components can also be arranged in the grip portion 1, such as: a fixing component for fixing the cable 4, the touch component and the air suction component 14, and the like, which are not listed here.

Referring to fig. 5 to 8, the working portion 2 includes a wind tunnel casing 21 formed with a cavity, and a circuit board 24 fixedly disposed in the cavity and used for controlling the wind suction assembly 14, and the working portion 1 further includes a central wind tunnel 22 disposed in the cavity, a heating assembly 23 sleeved on the central wind tunnel 22 and used for adjusting temperature, and a cover plate assembly 25 covering one side of the wind tunnel casing 21. The circuit board 24 is connected to the central air duct 22 and used for controlling the heating element 23, the air suction element 14, the heating element 23 are electrically connected to the circuit board 24, and the circuit board 24 is electrically connected to the cable 4. In this embodiment, the circuit board 24 is a double-layer circuit board 241, the central air duct 22 has an outer peripheral surface, the double-layer circuit board 241 is sleeved on the outer peripheral surface to be fixed with the central air duct 22, the double-layer circuit boards 241 are both PCB boards, and the heating element 23 is a heating wire 231. Indeed, in other embodiments, the heating element 23 may be other, and is not limited to the above embodiments. In the present embodiment, the air duct casing 21 is circular to match the shape of the central air duct 22. Indeed, in other embodiments, the air duct casing 21 may be other, and is not specifically limited herein, depending on the actual situation.

The double-layer circuit board 241 is used for controlling the operating parameters of the handheld blowing device 100. Such as: adjusting the heating power of the heating assembly 23, the rotating speed of the air suction assembly 14 and other working parameters. Correspondingly, the handheld blowing device 100 is provided with a second touch control assembly 6 and a third touch control assembly 7, and both the second touch control assembly 6 and the third touch control assembly 7 are electrically connected to the double-layer circuit board 241. The second touch control element 6 is configured to receive a second touch control operation to enable the double-layer circuit board 241 to adjust the heating power of the heating element 23, so as to adjust the air outlet temperature of the double-layer circuit board 241. The third touch component 7 is configured to receive a third touch operation to enable the double-layer circuit board 241 to adjust the rotation speed of the air suction component 14, so as to adjust the air outlet speed of the double-layer circuit board 241.

Optionally, the second touch-control assembly 6 and the third touch-control assembly 7 are disposed on the cover assembly 25; of course, in practical implementation, the second touch device 6 and the third touch device 7 can be disposed at other positions, such as: in the grip 1, the present embodiment does not limit the installation positions of the second touch device 6 and the third touch device 7.

In addition, in the embodiment, only two working parameters, that is, the double-layer circuit board 241 controls the heating power of the heating element 23 and the rotation speed of the air suction element 14, are taken as an example for description, during actual implementation, other working parameters may be additionally controlled, accordingly, more touch elements may be integrated on the handheld blowing device 100, and this embodiment is not listed here. As above, the second touch module 6 and the third touch module 7 may be implemented as a button module (i.e., a touch module implemented based on physical keys), or a touch display screen module (i.e., a touch module implemented based on virtual keys), and the implementation manner of the second touch module 6 and the third touch module 7 is not limited in this embodiment.

It should be added that two or three of the first touch component 5, the second touch component 6 and the third touch component 7 can also be implemented as one touch component, and the touch component has multiple adjustment functions.

As shown in fig. 3 and 10, since the handheld blowing device 100 is a high-speed blower, the circuit board 24 includes MOS transistors for driving, but the MOS transistors have a relatively high temperature rise, which affects the stability of the whole circuit when the temperature is relatively high, and therefore the MOS transistors are disposed near the air inlet 26, so that part of the air flow at the air inlet 26 flows to the MOS transistors to cool the MOS transistors. When the air suction assembly 14 is disposed in the holding portion 1, the air inlet 26 is disposed on the circumferential surface of the air duct casing 21 and is communicated with the holding portion 1. In order to ensure that a certain air flow is directed towards the MOS tubes for cooling them, the hand-held blowing device 100 further comprises a guide 26 (not shown) for guiding a part of the air flow towards the circuit board 24. The guide 26 is connected to the grip portion 1, the grip portion 1 includes a grip outer shell 13 having a hollow portion and a grip inner shell 15 disposed in the hollow portion, and one end of the guide 26 is connected to the grip inner shell 15 and is disposed to be inclined from a side away from the circuit board 24 to a side close to the circuit board 24. Or, the guiding element 26 is disposed in the cavity and above the air inlet 26, at this time, the guiding element 26 is sleeved on the central air duct 22 and divides the air flow at the air inlet 26 into two flows, one flow flows to the air outlet 27, and the other flow flows to the MOS tube to cool the MOS tube.

When the air suction assembly 14 is arranged in the cavity, the air inlet 26 is arranged on one side of the air duct shell 21, at the moment, the air flow flows to the other end of the air duct shell 21 from one end of the air duct shell 21, and the air flow is cooled through the circuit board 24 all the time, so that the cooling is convenient and fast.

Referring to fig. 3, the handheld blowing apparatus 100 further includes a nozzle assembly 3 connected to the air outlet 27 for gathering the air flow, the connection mode is not limited to bolt connection, screw connection, and clamp connection, and the nozzle assembly 3 is used for outputting the air flow heated by the heating assembly 23 from the handheld blowing apparatus 100. The tuyere assembly 3 is detachably mounted on the handheld blowing apparatus 100; or, it may be integrally formed with the central air duct 22. The air nozzle assembly 3 can change the shape and speed of the air flow in the handheld air blowing device 100, and can converge and output the air heated by the heating assembly 23 to the outside of the handheld air blowing device 100. The shape of the tuyere assembly 3 is not particularly limited herein, and is determined according to actual circumstances.

Please refer to fig. 8 and fig. 9, the central air duct 22 includes a first air duct 221 disposed near the cover plate assembly 25 and a second air duct 222 disposed in communication with the first air duct 221, the diameter of the first air duct 221 is smaller than the diameter of the second air duct 222, the double-layer circuit board 241 is sleeved on the first air duct 221, the heating assembly 23 is sleeved on the second air duct 222, and the air flow flows from the first air duct 221 to the second air duct 222, so as to design the objective: on the one hand, the airflow is heated by the heating assembly 23, and on the other hand, the overall appearance of the hand-held blowing device 100 is more attractive due to the convenience. As described above, in order to match the shape of the duct casing 21, in the present embodiment, the double-layer circuit board 241 has a circular shape. Indeed, in other embodiments, the shape of the double-layer circuit board 241 may be other, and is not limited herein according to the actual situation. The end part of the central wind tube 22 close to the cover plate component 25 is provided with a first thread, and the cover plate component 25 is provided with a second thread matched with the first thread to realize threaded connection.

One end of the central air duct 22 close to the cover plate assembly 25 is provided with a first through hole 223, the cover plate assembly 25 is provided with a first protruding block, and the first protruding block passes through the first through hole 223 and is clamped with the first through hole 223 so as to fixedly connect the cover plate assembly 25 and the central air duct 22, that is, in the embodiment, the end of the first air duct 221 is provided with the first through hole 223. In order to make the first protruding block and the first through hole 223 more firmly clamped, a fastener is further disposed at the end of the first protruding block protruding out of the first through hole 223 to prevent the first protruding block from sliding out of the first through hole 223. The fasteners are of conventional design and will not be described in detail herein.

The cover plate assembly 25 is disposed adjacent to the double-layer circuit board 241, and includes a cover plate body 251 disposed at one side of the double-layer circuit board 241, a back cover plate 253 disposed at one side of the cover plate body 251, and an end cap 252 disposed between the back cover plate 253 and the cover plate body 251, and the first protruding block is disposed at a central portion of the cover plate body 251. In the present embodiment, the cover plate body 251, the rear cover plate 253 and the end cap 252 are all circular to cover the air duct casing 21. However, in other embodiments, the cover body 251, the back cover 253 and the end cap 252 may have other shapes, and are not limited herein.

The double-layer circuit board 241 is provided with a second through hole 242, the cover plate assembly 25 is provided with a second protruding block corresponding to the second through hole 242, and the second protruding block passes through the second through hole 242 and is clamped with the second through hole 242 so that the cover plate assembly 25 is clamped with the double-layer circuit board 241. As described above, the second protruding piece is disposed on the cover plate body 251.

The cover plate body 251 is provided with a clamping groove, the rear cover plate 253 is provided with a third protruding block 2531 corresponding to the position of the clamping groove, and the third protruding block 2531 is clamped with the clamping groove. The cover plate assembly 25 further includes an end cap 252 disposed between the cover plate body 251 and the rear cover plate 253, and the end cap 252 is provided with a third through hole 2521 for passing the third protruding block 2531 therethrough.

In summary, the following steps: by optimizing the flow channel inside the handheld blowing device 100, the circuit board 24 is arranged close to the air inlet 26, and partial air flow at the air inlet 26 is utilized to dissipate heat of the circuit board 24 so as to achieve the purpose of rapid cooling, so that the process is simple and the cost is low;

by providing the guide 26, the guide 26 serves to direct a portion of the airflow to the circuit board 24, more precisely and conveniently;

the layout of the components on the circuit board 24 is adjusted so that the MOS transistor is disposed close to the intake air 26, so that part of the airflow at the intake air 26 dissipates heat of the MOS transistor.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a handheld blowing equipment, its characterized in that, including the portion of gripping, with the work portion that the portion of gripping is connected and introduce outside air current to the subassembly that induced drafts of work portion, the work portion is in including the dryer shell that is formed with the cavity and fixed the setting just be used for control in the cavity the circuit board of the subassembly that induced drafts, the work portion have the air intake and with the air outlet of air intake intercommunication, the circuit board is close to the air intake sets up.

2. The handheld blowing apparatus according to claim 1, wherein the air suction assembly is disposed in the holding portion, and the air inlet is disposed on a circumferential surface of the air duct housing and is communicated with the holding portion.

3. A hand-held hair-blowing device according to claim 2, characterised in that the hand-held hair-blowing device further comprises a guide for guiding a part of the air flow to the circuit board.

4. A hand-held blowing device according to claim 3, characterised in that the guide is connected to the grip portion.

5. The handheld blowing apparatus of claim 4, wherein the grip portion includes a grip outer housing formed with a hollow portion and a grip inner housing disposed in the hollow portion, and one end of the guide is connected to the grip inner housing and is disposed to be inclined from a side away from the circuit board to a side close to the circuit board.

6. The handheld blowing apparatus of claim 3, wherein the guide is disposed within the cavity and above the air inlet.

7. The handheld blowing apparatus of claim 1, wherein the suction assembly is disposed within the cavity, and the air inlet is disposed at a side of the air duct housing.

8. Hand-held hair-blowing device according to one of claims 1 to 7, characterised in that the circuit board comprises a MOS tube which is arranged close to the air inlet opening.