Hair dryer

Abstract

The present invention relates to a hair dryer, comprising an air duct part in which an air duct is formed, a blowing assembly including a fan and a motor for driving the fan to rotate about the rotation axis of the fan; a rear end housing connected with a power access end or forming a power access end for connecting a power supply; a connecting rod with one end connected to the rear end housing and the other end connected to the air duct part; a heat dissipation air inlet provided on the rear end housing or the connecting rod; a heat dissipation air outlet formed at the other end of the connecting rod and communicating the heat dissipation air inlet with an air inlet, and an air flow passage from the heat dissipation air inlet to the heat dissipation air outlet forms a heat dissipation air flow channel; a control board disposed in the heat dissipation air flow channel, and the heat dissipation air flow formed by the rotation of the fan enters from the heat dissipation air inlet, flows through the control board, flows out from the heat dissipation air outlet and enters the air duct. The control board is spaced from the air duct part to reduce the volume of the air duct part; the heat dissipation air flow channel increases the air blowing volume of the hair dryer while realizing heat dissipation of the control board.

Description

Technical Field

[0001] The present invention relates to the technical field of gardening tools, and particularly to a hair dryer. Background Art

[0002] A hair dryer is a commonly used gardening tool that blows the leaves scattered on the ground into a pile by the wind blown out of the air outlet.

[0003] Inside the housing of the hair dryer, there are a motor for driving the fan to rotate, a control board for controlling the motor, etc. In order to dissipate heat from the control board, in the traditional technology, the control board is arranged inside the housing, near the air inlet, so as to utilize the air flowing through the air duct to dissipate heat from the control board.

[0004] However, placing the control board inside the housing will increase the volume of the whole machine; while setting the control board near the air inlet will reduce the blowing efficiency of the air duct and increase the noise. Summary of the Invention

[0005] Based on this, in view of the problems existing in the setting method of the control board in the traditional technology, it is necessary to provide a hair dryer that can effectively dissipate heat from the control board and does not affect the blowing efficiency.

[0006] A hair dryer, comprising:

[0007] An air duct part extending along the longitudinal direction, in which an air duct is formed, and the air duct has an air inlet and an air outlet;

[0008] A blowing assembly arranged in the air duct part, including a fan and a motor for driving the fan to rotate around the rotation axis of the fan;

[0009] A rear end housing, which is connected with a power access end or forms a power access end for connecting a power supply;

[0010] A connecting rod, one end of which is connected to the rear end housing and the other end is connected to the air duct part;

[0011] A heat dissipation air flow inlet arranged on the rear end housing or the connecting rod, used for introducing heat dissipation air flow when the fan rotates;

[0012] A heat dissipation air flow outlet formed at the other end of the connecting rod, the heat dissipation air flow outlet communicates with the heat dissipation air flow inlet and is communicated with the air inlet, and the air flow circulation path from the heat dissipation air flow inlet to the heat dissipation air flow outlet forms a heat dissipation air flow channel;

[0013] The control board is disposed in the heat dissipation air flow channel. The control board and the air duct portion are spaced apart in the longitudinal direction. The heat dissipation air flow formed by the rotation of the fan enters from the heat dissipation air inlet, flows through the control board, and exits from the heat dissipation air outlet and enters the air duct.

[0014] For the above hair dryer, the control board for controlling the motor is disposed inside the rear housing. The air duct portion does not need to reserve an installation space for accommodating the control board, thereby reducing the volume of the housing. At the same time, a heat dissipation air flow channel for heat dissipation is formed inside the rear housing, and the heat dissipation air flow channel is communicated with the air duct inside the air duct portion. While realizing the heat dissipation of the control board, to a certain extent, the air volume of the hair dryer is increased, ensuring the blowing efficiency.

[0015] In one embodiment, the projection of the control board on a plane perpendicular to the rotation axis is located within the projection of the air duct portion on the plane.

[0016] In one embodiment, the fan is an axial flow fan. The heat dissipation air outlet is arranged facing the axial flow fan. The air flow exits from the heat dissipation air outlet along the rotation axis direction and enters the air duct.

[0017] In one embodiment, the surface of the control board on which electronic components are laid is parallel to the rotation axis direction of the fan. The air flow flows through the surface along the rotation axis direction and exits from the heat dissipation air outlet.

[0018] In one embodiment, the heat dissipation air inlet and the heat dissipation air outlet are oppositely arranged in the rotation axis direction. The air flow enters the heat dissipation air inlet along the longitudinal direction and exits from the heat dissipation air outlet.

[0019] In one embodiment, the control board is disposed inside the rear housing. The heat dissipation air inlet is opened on the rear housing. One end of the connecting rod communicates with the heat dissipation air inlet, and the other end communicates with the air inlet.

[0020] In one embodiment, the power access end includes a battery pack interface formed on the rear housing for plugging in a battery pack. The control board is disposed on one side of the battery pack interface. The installation surface of the control board is substantially parallel to the plugging direction of the battery pack.

[0021] In one embodiment, the power access end includes two battery pack interfaces formed on the rear housing and arranged back to back with each other. The control board is disposed between the two battery pack interfaces.

[0022] In one embodiment, the power access terminal includes a power socket configured as a male or female power plug, and the power socket is disposed on the rear housing or connected to the rear housing through an electric wire.

[0023] In one embodiment, the rear housing is formed with a holding portion for user operation. Description of the Drawings

[0024] Figure 1 It is a schematic cross-sectional structure view of a hair dryer according to an embodiment of the present invention.

[0025] Figure 2 It is Figure 1 a cross-sectional view taken along the line A-A in

[0026] Figure 3 It is Figure 1 a side view of the hair dryer shown.

[0027] Figure 4 It is a schematic cross-sectional structure view of a hair dryer according to another embodiment of the present invention.

[0028] Figure 5 It is a schematic cross-sectional structure view of a hair dryer according to still another embodiment of the present invention.

[0029] Figure 6 It is a schematic cross-sectional structure view of a hair dryer according to another embodiment of the present invention.

[0030] 100, hair dryer

[0031] 10, air duct portion 101, air duct 102, air inlet

[0032] 103, air outlet 104, left fixing member 1041, abutting portion

[0033] 110, air intake portion 112, left housing 120, air duct portion

[0034] 20, blowing assembly 210, fan 220, motor

[0035] 30, rear housing 301, internal cavity 302, heat dissipation air inlet

[0036] 303, heat dissipation air outlet 310, access terminal 320, battery pack interface

[0037] 330, partition chamber 340, holding portion 341, switch

[0038] 40, connecting rod 401, connecting end

[0039] 50, control board 510, power cord 520, mounting surface

[0040] 60, battery pack 70, backpack power connection cable 80, heat sink Detailed implementation manners

[0041] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand 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.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art belonging to the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0044] In the art, in order to dissipate heat from the control board, the control board is usually arranged inside the housing near the air inlet so as to utilize the wind flowing through the air duct portion to dissipate heat from the control board. However, placing the control board inside the housing will increase the volume of the whole machine; however, setting the control board near the air inlet will reduce the blowing efficiency of the air duct and increase the noise.

[0045] To solve the above problems, referring to Figure 1 , an embodiment of the present invention discloses a hair dryer 100 that can blow out wind to blow the leaves scattered on the ground into a pile.

[0046] The hair dryer 100 includes an air duct portion 10, a blower assembly 20 arranged in the air duct portion 10, a rear end housing 30, and a connecting rod 40 connecting the air duct portion 10 and the rear end housing 30 in the middle. An air duct 101 is formed in the air duct portion 10. An air inlet 102 and an air outlet 103 of the air duct 101 are formed on the shell wall of the air duct portion 10. The blower assembly 20 is arranged in the air duct 101 and is used to generate an air flow flowing in the air duct 101.

[0047] The air blowing assembly 20 includes at least a fan 210 and a motor 220. When the air blowing assembly 20 operates, the motor 220 drives the fan 210 to rotate about the rotation axis X of the fan 210, so that the outside air enters the air duct 101 from the air inlet 102 and then blows out from the air outlet 103.

[0048] In a specific solution, the air duct part 10 includes an air inlet part 110 and an air duct part 120 connected to the air inlet part 110. The air inlet part 110 is connected to the connecting rod 40. The air inlet 102 is arranged on the air inlet part 110, and the air outlet 103 is arranged on the air duct part 120. As a whole, the air duct part 10 extends along the longitudinal direction, specifically along the direction of the rotation axis X of the fan 210. The air blowing assembly 20 is located in the air inlet part 110, and the air inlet 102 and the air outlet 103 are respectively arranged at opposite ends of the air duct part 10 along the rotation axis X direction.

[0049] The rear end housing 30 is connected to the air duct part 10 through the connecting rod 40. The rear end housing 30 is connected with a power supply access end 310 or is formed with a power supply access end 310 for connecting a power supply. When specifically set, the type of the power supply access end 310 is not limited. For example, Figure 1 as shown, the power supply access end 310 is a power socket configured as a male power plug or a female power plug, specifically a male power plug. The power socket is arranged on the rear end housing 30. In addition, the power supply access end 310 can also be a female power plug or a battery pack interface; or the power supply access end 310 is a power socket fixedly connected to the rear end housing 30 through an electric wire, and the power socket is a male power plug or a female power plug.

[0050] Reference Figure 1 , in this embodiment, the rear end housing 30 is set to have an internal cavity 301, and the control board 50 for controlling the motor 220 is arranged inside the rear end housing 30. In this way, the internal space of the rear end housing 30 is used to install the control board 50, and the air duct part 10 does not need to reserve an installation space for accommodating the control board 50, thereby reducing the volume of the air duct part 10.

[0051] Furthermore, in order to dissipate heat from the control board 50, the rear end housing 30 is also provided with a heat dissipation air flow inlet 302 and a heat dissipation air flow outlet 303 communicated with its internal cavity 301. In this way, a heat dissipation air flow channel is formed between the heat dissipation air flow inlet 302 and the heat dissipation air flow outlet 303. The heat dissipation air flow inlet 302 is used to introduce heat dissipation air flow when the fan 210 rotates. While connecting the rear end housing 30 to the air duct part 10, the connecting rod 40 also communicates the heat dissipation air flow outlet 303 with the air duct 101; at the same time, the control board 50 is located in the heat dissipation air flow channel inside the rear end housing 30. The control board 50 is located in the heat dissipation air flow channel inside the rear end housing 30. More specifically, it means that at least the heat-generating electronic components of the control board 50 should be located in the heat dissipation air flow channel inside the rear end housing 30, so that the heat dissipation air flow can dissipate heat from the control board 50.

[0052] In the above manner, the air flow, i.e., the heat dissipation air flow Y, can flow in from the heat dissipation air inlet 302 and flow out from the heat dissipation air outlet 303, thereby dissipating heat from the control board 50. Moreover, the heat dissipation air outlet 303 is communicated with the air duct 101. When the blower assembly 20 works, the heat dissipation air inlet 302 serves as an auxiliary air inlet of the air duct 101. Thus, while achieving heat dissipation for the control board 50, the air volume blown by the hair dryer 100 is increased to a certain extent. Therefore, the control board 50 can be understood as being also arranged near the air inlet of the hair dryer 100. However, instead of affecting the blowing efficiency, it will improve the blowing efficiency of the hair dryer 100.

[0053] For the above hair dryer 100, the control board 50 controlling the motor 220 is arranged inside the rear end housing 30. The air duct portion 10 does not need to reserve an installation space for accommodating the control board 50, thereby reducing the volume of the air duct portion 10. At the same time, a heat dissipation air flow channel for heat dissipation is formed inside the rear end housing 30, and this heat dissipation air flow channel is communicated with the air duct 101 inside the air duct portion 10. While achieving heat dissipation for the control board 50, the air volume blown by the hair dryer 100 is increased to a certain extent, and the blowing efficiency is improved. After testing, under the condition of the same rated power, the heat dissipation effect of the hair dryer adopting the above solution is comparable to that of the traditional hair dryer, but the volume can be reduced by 20 - 30%; and the blowing efficiency is slightly higher than that of the traditional hair dryer.

[0054] In some embodiments, the projection of the control board 50 on the plane perpendicular to the rotation axis X is within the projection range of the air duct portion 10 on this plane. As Figure 1 shown, when the rotation axis X is along the horizontal direction, the plane perpendicular to the rotation axis X is a vertical plane extending in the vertical direction. The projection of the control board 50 on this vertical plane is within the projection of the air duct portion 10 on the vertical plane. In this way, the radial dimension of the control board 50 does not exceed the high radial dimension of the air duct portion 10, that is, the control board 50 is arranged inside the rear end housing 10 without increasing the radial dimension of the blower as a result, which is beneficial to the miniaturization of the volume of the blower.

[0055] The connecting rod 40 is used to connect the heat dissipation air outlet 303 and the air duct portion 10. As a specific implementation, the connecting rod 40 is a hollow rod. The power cord 510 connecting the control board 50 to the motor 220 passes through the inside of the connecting rod 40, making the messy wires invisible outside the hair dryer 100, ensuring a clean appearance and also preventing the power cord 510 from being damaged by external forces. The connecting rod 40 connects the rear end housing 30 and the air duct portion 10, separating the rear end housing 30 and the air duct portion 10 by a certain distance to form an intake space.

[0056] When the air inlet part 110 is connected to the connecting rod 40, in order to prevent the connecting rod 40 from affecting the air inlet effect of the air inlet 102, the connecting rod 40 is embedded in the air inlet part 110. Specifically, referring to Figure 1 , one end of the connecting rod 40 connected to the air inlet part of the housing 110 is defined as the connection end 401, and the connection end 401 is inserted into the air inlet part 110 and communicated with the air duct 101.

[0057] As a preferred solution, the air inlet 120 is arranged around the connection end 401. In this way, the central position of the air inlet part 110 can receive the air flow blown from the heat dissipation air flow outlet 303, and at the same time, in the circumferential direction around the connection end 401, the air inlet part 110 can receive the air flow from the outside entering through the air inlet 120. After the two air flows converge, a larger air volume can be formed, providing a larger air inlet capacity.

[0058] The fixing method of the connection end 401 to the air inlet part 110 is not limited. Preferably, the connection end 401 is embedded in the air inlet part 110 and is detachably mated with the air inlet part 110. In a possible implementation manner, the air inlet part 110 is a half-type structure, including a left housing 112 and a right housing (not shown in the sectional view) spliced left and right. At this time, the air duct part 120 can be integrally formed or half-type. After the connection end 401 is connected to the air inlet part 110, the air inlet part 110 is then connected to the air duct part 120.

[0059] Referring to Figure 1 , a left fixing member 104 is provided in the left housing 112, and a right fixing member is provided in the air inlet part of the right housing. The left fixing member 104 and the right fixing member are spliced together and clamp the connection end 401. The splicing and mating direction of the left fixing member and the right fixing member is perpendicular to the rotation axis X. Specifically, please refer to Figure 1 The shown sectional view schematically shows the sectional structure of the left fixing member 104. The left fixing member 104 has an abutting portion 1041 for clamping the connection end 401. The structure of the right fixing member not shown in Figure 1 is the same as that of the left fixing member 104. After the left fixing member 104 and the right fixing member are spliced, a cylindrical sleeve can be formed. The inner wall of the sleeve has a plurality of abutting portions 1041. During assembly, the connection end 410 can be first inserted into the left fixing member 104, and then the left housing and the right housing are spliced so that the right fixing member 104 is docked with the left fixing member 104. Finally, the left housing and the right housing are connected and fixed by fasteners, so that the right fixing member and the left fixing member 104 are docked and the connection end 401 is reliably clamped.

[0060] The connection method between the connecting rod 40 and the rear end housing 30 is not limited. In a possible implementation manner, the connecting rod 40 and the rear end housing 30 are of an integral structure. In this way, the connecting rod 40 and the rear end housing 30 are combined with the air duct part 10 detachably together, simplifying the assembly process.

[0061] Please refer to Figure 1 , the rear housing 30, the connecting rod 40, and the air duct portion 10 are arranged in sequence along the rotation axis X. The extending direction of the rotation axis X is defined as the length direction of the hair dryer 100, and the control board 50 is parallel to the rotation axis X. More specifically, the control board 50 is plate-shaped and has a mounting surface 520 perpendicular to its thickness direction, and the mounting surface 520 is parallel to the rotation axis X. The mounting surface 520 is used to set various electronic components.

[0062] Refer to Figure 2 and Figure 3 , in some embodiments, the power access terminal is a battery pack interface 320 formed on the rear housing 30 for plugging in the battery pack 60. The control board 50 is arranged on one side of the battery pack interface 320, and the mounting surface 520 of the control board 50 is substantially parallel to the plugging direction of the battery pack 60, so as to realize the miniaturization of the rear housing 30 and have the effect of a small volume.

[0063] When specifically setting, a battery pack interface 320 is respectively arranged on both sides of the control board 50 in the thickness direction of the control board 50, and the plugging and unplugging directions of the two battery pack interfaces 320 are both parallel to the mounting surface 520 of the control board 50. At this time, the two battery pack interfaces 32 are arranged back to back on the rear housing 30, and the control board 50 is located between the two battery pack interfaces 320. Since the thickness of the control board 50 is small, the superimposed size of the two is small, which is beneficial to realizing the miniaturization of the rear housing 30.

[0064] In other embodiments, the battery pack interface 320 may be arranged only on one side of the control board 50. Referring to Figure 1 , when mating with the battery pack 60, the battery pack 60 is assembled to the battery pack interface 320 along the direction parallel to the mounting surface 520, that is, the battery pack 60 is assembled to the rear housing 30 along the length direction of the hair dryer 100. After the battery pack 60 is assembled to the rear housing 30, the battery pack 60 and the control board 50 are stacked in the thickness direction of the control board 50. Since the thickness of the control board 50 is small, the superimposed size of the two is small, which is beneficial to realizing the miniaturization of the rear housing 30.

[0065] Based on the above embodiments, there are also many specific setting methods for the control board 50. Figure 1 Illustrates a working posture of the hair dryer 100 when it is normally used. The length direction (or longitudinal direction) of the hair dryer 100 extends horizontally, and the control board 50 is arranged vertically. Generally, the vertical direction is also the height direction of the hair dryer 100. That is to say, the control board 50 is consistent with the height direction of the hair dryer 100. In this way, the projection of the control board 50 and the housing 10 on a plane parallel to the vertical direction overlaps, so the height dimension of the hair dryer 100 is small.

[0066] As a specific solution, refer to Figure 2 and Figure 3 , both sides of the control board 50 are provided with battery pack interfaces 320, and a 20V battery pack 60 is installed on each battery pack interface 320. In practice, the operating voltage of the blower assembly 20 needs to reach 40V. However, with the single battery pack solution, the volume and weight of the battery pack 60 will be relatively large, which is not conducive to replacement and is also likely to cause uneven weight distribution of the whole machine. Therefore, a 20V battery pack is installed on each side of the control board 50 to meet the operating voltage requirement of the whole machine, and the two battery packs 60 are symmetrically arranged, with balanced weight distribution and convenient for holding.

[0067] Please refer to Figure 4 , in another embodiment, the length direction of the hair dryer 100 extends horizontally, and the control board 50 is arranged horizontally. The control board 50 has a battery pack 60 only on one side, and specifically, the battery pack 60 is located below the control board 50. The battery pack 60 is assembled to the rear end housing 30 along a direction parallel to the control board 50. After the battery pack 60 is assembled to the rear end housing 30, the battery pack 60 and the control board 50 are stacked in the thickness direction of the control board 50. Since the thickness of the control board 50 is small, the superimposed size of the two is small, which is conducive to the miniaturization of the rear end housing 30.

[0068] As Figure 1 shown, the rear end housing 30 includes a partition bin 330 forming an accommodation cavity 301 and a holding portion 340. The partition bin 330 is connected to the connecting rod 40, one end of the holding portion 340 is connected to the partition bin 330, and the other end of the holding portion 340 extends away from the partition bin 330 along the rotation axis X. The holding portion 340 is for the user to hold and operate. Further, a switch 341 for controlling the motor 220 can be provided on the holding portion 340 to facilitate the control of the operation of the motor 220.

[0069] In the above embodiments, since the rear end housing 30, the connecting rod 40, and the air duct portion 10 extend and are arranged in sequence along the aforementioned longitudinal direction, that is, arranged in sequence along the rotation axis X, the setting method of the holding portion 340 utilizes the existing length direction dimension of the hair dryer 100 and will not further increase the length direction dimension. As a specific solution, refer to Figure 1 , the other end of the holding portion 340 extends above the air inlet portion 110 of the air duct portion 10. In this way, the weight of the holding portion 340 can balance the weight increase of the rear end housing 30 caused by the battery pack 60, making the weight distribution of the whole machine more uniform. When the battery pack 60 is installed on the rear end housing 30, the user can hold the holding portion 340, and at this time, the hair dryer 100 is used as a handheld hair dryer.

[0070] In addition, in the art, the grip of the blower is usually connected to the shell. Since there is an air outlet on the shell, safety regulations require that the distance between the grip and the air outlet be greater than 0.7 mm. In order to meet safety requirements during operation, the air duct portion is usually set longer, so that the air outlet on the air duct portion is farther from the grip. However, this method causes the air duct portion to be too long. At the same time, since the air blowing assembly is usually arranged inside the shell below the grip, the air flow is lost when flowing in the air duct portion, which reduces the blowing efficiency of the hair dryer.

[0071] In the embodiment of the present invention, the rear end housing 30 and the air duct portion 10 are connected by a connecting rod 40, and the connecting rod 40 has a preset length so that the grip portion 340 and the air duct portion 10 are spaced apart by a preset distance in the longitudinal extension direction. With such an arrangement, the grip portion 340 is far away from the air outlet 103. When the user uses the hair dryer 100, the hand is at a position far away from the air outlet 103. Therefore, compared with the conventional technology, in the present invention, the safety regulations are met but the air duct portion does not need to be extended, and the blower assembly 20 can be arranged closer to the air outlet 130, that is, the blower assembly 20 is placed in front, so that the air flow has less loss when flowing in the air duct portion, thereby ensuring the blowing efficiency of the hair dryer 100.

[0072] The structure of the rear end housing 30 is not limited to the above-mentioned embodiment. Figure 5 As shown, in another embodiment, the rear housing 30 includes a compartment 330 and a grip 340 forming a accommodating cavity 301, wherein the compartment 330 is connected to the connecting rod 40, one end of the grip 340 is connected to the compartment 330, and the grip 340 extends obliquely upward from the compartment 330. An access end 310 is provided at one end of the rear housing 30 away from the connecting pipe 40, and the access end 310 is a power socket fixedly connected to the rear housing 30 by an electric wire. The control panel 50 is arranged in the vertical direction. In this embodiment, the connecting rod 40 has a preset length so that the grip 340 and the air duct portion 10 are spaced apart by a preset distance in the longitudinal extension direction. Similarly, the blower assembly 20 can be arranged closer to the air outlet 130, that is, the blower assembly 20 is placed in front, so that the air flow has less loss when flowing in the air duct portion 10, thereby ensuring the blowing efficiency of the hair dryer 100.

[0073] like Figure 5 As shown, in another embodiment, the rear end housing 30 includes a partition 330 and a gripping portion 340 that form a receiving cavity 301 , the gripping portion 340 connects the partition 330 and the connecting rod 40 in the middle, and the gripping portion 340 also connects the heat dissipation airflow outlet 303 and the connecting rod 40 .

[0074] In this embodiment, the partition chamber 330, the holding part 340, the connecting rod 40, and the air duct part 10 are arranged in sequence. The central axes of the holding part 340, the connecting rod 40, and the air duct part are substantially coincident. While providing a holding function, the holding part 340 extends the length of the hair dryer 100, which can expand the working radius of the hair dryer 100. Further, in this embodiment, a switch 341 for controlling the motor 210 is provided on the holding part 340. The switch 341 is provided on the holding part 340, which is convenient for controlling the start and stop of the motor 210.

[0075] Reference Figure 1 and Figure 3 , at one end of the rear end housing 30 away from the connecting rod 40, an access end 310 for connecting the power supply is provided. The access end 310 is specifically a male power plug for connecting the backpack power connection line 70. When the hair dryer 100 is connected to the backpack strap, the user can carry the hair dryer 100 on the back and connect the backpack power connection line 70 of the backpack power supply to the access end 310. At this time, the hair dryer 100 is used as a backpack hair dryer.

[0076] In this embodiment, the connecting rod 40 has a preset length so that the holding part 340 and the air duct part 10 are spaced apart by a preset distance in the longitudinal extension direction. Similarly, the air blowing assembly 20 can be arranged closer to the air outlet 130, that is, the air blowing assembly 20 is placed in the front. In this way, the loss of the air flow in the air duct part is small, ensuring the blowing efficiency of the hair dryer 100.

[0077] In the above embodiment, the control board 50 is arranged in the rear end housing 30 and is spaced apart from the air duct part 10. In this way, the volume of the air duct part 10 is not affected by the control board 50 and can be more compact. At this time, since the control board 50 is far from the air blowing assembly 20, the heat dissipation of the control board 50 may be affected.

[0078] To solve this problem, the inventor continued to make some improvements. In some embodiments, the fan 210 is specifically an axial flow fan, and the heat dissipation air flow outlet 303 faces the axial flow fan. The heat dissipation air flow flows out from the heat dissipation air flow outlet 303 along the rotation axis X direction and enters the air duct part 10. The heat dissipation air flow inlet 302 and the heat dissipation air flow outlet 303 are arranged along the axis of the fan 210, so that the heat dissipation air flow flows along the rotation axis X direction. In this way, more heat dissipation air flow can be generated when the axial flow fan works, improving the heat dissipation effect.

[0079] Further, in some embodiments, the heat dissipation air inlet 302 and the heat dissipation air outlet 303 are sequentially arranged along the axis of the fan 210. The heat dissipation air can flow along the direction of the rotation axis X, and the mounting surface 520 of the control board 50 for laying electronic components is parallel to the rotation axis X direction of the fan 210. In this way, the axial flow fan generates a large amount of heat dissipation air, and the heat dissipation air Y entering from the heat dissipation air inlet 302 can directly blow towards the electronic components on the control board 50 along a straight path, quickly taking away the heat generated by the electronic components, and having a high heat dissipation efficiency.

[0080] Further, the heat dissipation air inlet 302 and the heat dissipation air outlet 303 are relatively arranged at both ends of the rear end housing 30 along the aforementioned longitudinally extending direction, and the heat dissipation air flows along a straight path from the heat dissipation air inlet 302 to the heat dissipation air outlet 303. By the above means, the entire heat dissipation air channel is along the rotation axis X direction, and the air can flow more smoothly. When the fan 210 rotates, referring to Figure 1 , the heat dissipation air Y entering from the heat dissipation air inlet 302 can quickly blow towards the control board 50 along a straight path, having a high heat dissipation efficiency.

[0081] Based on the above embodiments, please refer to Figure 1 , in order to improve the heat dissipation effect on the control board 50, a heat dissipation member 80 for accommodating the control board 50 is further provided inside the rear end housing 30. The heat dissipation member 80 is located in the heat dissipation air channel, and the heat dissipation member 80 is in contact with the electronic components connected to the control board 50 to perform heat exchange. The material of the heat dissipation member 80 is selected as a material with a high thermal conductivity, such as aluminum, to ensure the heat dissipation effect.

[0082] The shape of the heat dissipation member 80 itself and its installation method inside the rear end housing 30 are not limited. In a possible implementation manner, the heat dissipation member 80 is fixed in the heat dissipation air channel of the rear end housing 30. The heat dissipation member has a card slot, and the control board 50 is fixed in the card slot. The heat dissipation member 80 can be specifically set in a U shape. In this implementation manner, the control board 50 is clamped and fixed to the heat dissipation member 80, and is fixed inside the rear end housing 30 through the heat dissipation member 80. Only how to fix the heat dissipation member 80 needs to be considered inside the rear end housing 30, simplifying the internal structure of the rear end housing 30.

[0083] In another possible implementation manner, the heat dissipation member 80 is in a box shape, which is a heat dissipation box. The control board 50 is placed inside the heat dissipation member 80, and the electronic components arranged on the control board 50 are in contact with the inner wall of the heat dissipation member 80. By the above means, the heat generated by the control board 50 is transferred to the heat dissipation box 80, which is equivalent to increasing the heat dissipation area of the control board 50 and can improve the heat dissipation efficiency. Further, in this implementation manner, heat dissipation holes can also be opened on the heat dissipation box 80, so that the heat dissipation air Y can still pass through the inside of the heat dissipation box 80, thereby greatly improving the heat dissipation efficiency of the control board 50.

[0084] In this embodiment, when a heat dissipation component 80 for accommodating a control board 50 is further provided inside the rear end housing 30, in order to improve the heat dissipation efficiency, the position of the heat dissipation air inlet 302 on the rear end housing 30 is directly opposite to the heat dissipation component 80. When the hair dryer 100 works, the heat dissipation air flow Y entering the rear end housing 30 from the heat dissipation air inlet 302 can blow on the heat dissipation component 80, so that the heat generated by the control board 50 can be quickly taken away, improving the heat dissipation efficiency.

[0085] Furthermore, the heat dissipation air inlet 302 includes a plurality of heat dissipation grilles or heat dissipation meshes. Specifically, when setting, a plurality of heat dissipation air inlets 302 all face the heat dissipation component 80. By providing a plurality of heat dissipation grilles or heat dissipation meshes, the flow area between the heat dissipation component 80 and the external air flow is increased, improving the heat dissipation efficiency.

[0086] In the above embodiments, the heat dissipation air inlet 302 is provided on the rear end housing 30, and the control board 50 is provided inside the rear end housing 30. In other embodiments, the heat dissipation air inlet 302 can also be provided on the connecting rod 40, such as on the outer wall of the end of the connecting rod 40 far from the air duct portion 10. The heat dissipation air outlet 303 is still located at the end of the connecting rod 50 close to the air duct portion 10. That is to say, the heat dissipation air flow channel can be located inside the connecting rod 40. Correspondingly, the control board 50 is also provided inside the connecting rod 40. The control board 50 is also provided inside the connecting rod 40, and the control board 50 is spaced from the air duct portion 10, which does not affect the volume of the air duct portion 10, facilitating the miniaturization of the volume of the blower.

[0087] Furthermore, when the control board 50 is provided inside the connecting rod 40, the fan 210 is specifically an axial flow fan, the heat dissipation air outlet 303 is arranged facing the axial flow fan, and the heat dissipation air flow flows out from the heat dissipation air outlet 303 along the rotation axis X direction and enters the air duct portion 10. The heat dissipation air inlet 302 and the heat dissipation air outlet 303 are arranged along the axis of the fan 210, so that the heat dissipation air flow flows along the rotation axis X direction. In this way, more heat dissipation air flow can be generated when the axial flow fan works, improving the heat dissipation effect.

[0088] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A hair dryer, characterized in that, comprising: An air duct part extending along the longitudinal direction, within which an air duct is formed, and the air duct has an air inlet and an air outlet; A blower assembly disposed within the air duct part, including a fan and a motor for driving the fan to rotate about the rotation axis of the fan; A rear end housing, which is connected with a power access terminal or forms a power access terminal for connecting to a power source; A connecting rod, one end of which is connected to the rear end housing and the other end is connected to the air duct part; A heat dissipation air flow inlet disposed on the rear end housing or the connecting rod for introducing heat dissipation air flow when the fan rotates; A heat dissipation air flow outlet formed at the other end of the connecting rod, the heat dissipation air flow outlet communicates with the heat dissipation air flow inlet and is also in communication with the air inlet, and the air flow passage from the heat dissipation air flow inlet to the heat dissipation air flow outlet forms a heat dissipation air flow channel; A control board disposed in the heat dissipation air flow channel, the control board is spaced apart from the air duct part in the longitudinal direction, and the heat dissipation air flow formed by the rotation of the fan enters from the heat dissipation air flow inlet, flows through the control board, and flows out from the heat dissipation air flow outlet and enters the air duct; wherein, the control board is disposed within the rear end housing, the heat dissipation air flow inlet is opened on the rear end housing, one end of the connecting rod communicates with the heat dissipation air flow inlet and the other end communicates with the air inlet.

2. The hair dryer according to claim 1, characterized in that, The projection of the control board on a plane perpendicular to the rotation axis is within the projection range of the air duct part on the plane.

3. The hair dryer according to claim 1, characterized in that, The fan is an axial flow fan, the heat dissipation air flow outlet is arranged facing the axial flow fan, and the air flow flows out from the heat dissipation air flow outlet along the rotation axis direction and enters the air duct.

4. The hair dryer according to claim 3, characterized in that, The surface of the control board on which electronic components are laid is parallel to the rotation axis direction of the fan, and the air flow flows through the surface along the rotation axis direction and flows out from the heat dissipation air flow outlet.

5. The hair dryer according to claim 3, characterized in that, The heat dissipation air flow inlet and the heat dissipation air flow outlet are oppositely arranged in the longitudinal direction, and the air flow enters the heat dissipation air flow inlet along the rotation axis direction and flows out from the heat dissipation air flow outlet.

6. The hair dryer according to claim 1, characterized in that, The power access terminal includes a battery pack interface formed on the rear end housing for plugging in a battery pack, the control board is disposed on one side of the battery pack interface, and the mounting surface of the control board is substantially parallel to the plugging direction of the battery pack.

7. The hair dryer according to claim 1, characterized in that, The power access terminal includes two battery pack interfaces formed on the rear end housing and arranged back to back with each other, and the control board is disposed between the two battery pack interfaces.

8. The hair dryer according to claim 1, characterized in that, A 20V battery pack is installed on each battery pack interface.

9. The hair dryer according to claim 1, characterized in that, The power supply access terminal includes a power socket configured as a male or female power plug, and the power socket is disposed on the rear housing or connected to the rear housing through an electric wire.

10. The hair dryer according to claim 1, characterized in that the rear housing is formed with a gripping portion for user operation.

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