Hair dryer

Abstract

The invention relates to an air blower which comprises an air duct part in which an air duct is formed, and an air blowing assembly which comprises a fan and a motor for driving the fan to rotate around the rotation axis of the fan, the rear-end casing is connected with a power supply access end or forms a power supply access end used for being connected with a power supply; one end of the connecting rod is connected with the rear-end casing, and the other end is connected with the air duct part; the heat dissipation airflow inlet is formed in the rear-end machine shell or the connecting rod; the heat dissipation airflow outlet is formed in the other end of the connecting rod and communicates with the heat dissipation airflow inlet and the air inlet, and an airflow circulation path from the heat dissipation airflow inlet to the heat dissipation airflow outlet forms a heat dissipation airflow channel; and the control panel is arranged in the heat dissipation airflow channel, and heat dissipation airflow formed by rotation of the fan enters from the heat dissipation airflow inlet, flows through the control panel, flows out from the heat dissipation airflow outlet and enters the air channel. The control panel and the air duct part are arranged at intervals to reduce the size of the air duct part; the heat dissipation airflow channel increases the air blowing amount of the air blower while heat dissipation of the control panel is achieved.

Description

[0001] This application is a divisional application of the Chinese patent application filed by the applicant on March 27, 2020, with the invention name “Hair Dryer”, the priority date being March 27, 2019, and the application number being 202010228007.4. Technical Field

[0002] The present invention relates to the technical field of garden tools, in particular to a hair dryer. Background Art

[0003] A hair dryer is a commonly used gardening tool that uses wind blown out from an air outlet to blow leaves scattered on the ground into a pile.

[0004] Inside the hair dryer housing are a motor that drives the fan and a control board that controls the motor. To dissipate heat from the control board, conventional technology places the control board inside the housing near the air inlet so that the air flowing through the air duct can dissipate heat from the control board.

[0005] However, placing the control panel inside the housing will increase the volume of the entire machine; and placing the control panel near the air inlet will reduce the blowing efficiency of the air duct and increase noise. Summary of the Invention

[0006] Based on this, it is necessary to provide a hair dryer that can effectively dissipate heat from the control panel without affecting the blowing efficiency, in order to address the problems existing in the setting method of the control panel in the traditional technology.

[0007] A hair dryer, comprising:

[0008] An air duct portion extends in a longitudinal direction and has an air duct formed therein, wherein the air duct has an air inlet and an air outlet;

[0009] an air blowing assembly, disposed in the air duct portion, comprising a fan and a motor driving the fan to rotate around a rotation axis of the fan;

[0010] A rear end housing, wherein the rear end housing is connected to a power supply access terminal or forms a power supply access terminal for connecting to a power supply;

[0011] A connecting rod, one end of which is connected to the rear housing and the other end of which is connected to the air duct portion;

[0012] a heat dissipation airflow inlet, provided on the rear housing or the connecting rod, for introducing heat dissipation airflow when the fan rotates;

[0013] a heat dissipation airflow outlet formed at the other end of the connecting rod, the heat dissipation airflow outlet being connected to the heat dissipation airflow inlet and the air inlet, and an airflow flow path from the heat dissipation airflow inlet to the heat dissipation airflow outlet forming a heat dissipation airflow channel;

[0014] A control panel is provided in the heat dissipation airflow channel. The control panel and the air duct portion are spaced apart in the longitudinal direction. The heat dissipation airflow formed by the rotation of the fan enters from the heat dissipation airflow inlet, flows through the control panel, flows out from the heat dissipation airflow outlet and enters the air duct.

[0015] In the above-mentioned hair dryer, the control board of the motor is arranged inside the rear end casing, and the air duct part does not need to reserve an installation space for accommodating the control board, thereby reducing the volume of the shell; at the same time, a heat dissipation air flow channel for heat dissipation is formed inside the rear end casing, and the heat dissipation air flow channel is connected to the air duct in the air duct part. While achieving heat dissipation of the control board, the air volume of the hair dryer is increased to a certain extent, ensuring the blowing efficiency.

[0016] In one embodiment, a projection of the control plate on a plane perpendicular to the rotation axis is located within a range of a projection of the air duct portion on the plane.

[0017] In one embodiment, the fan is an axial flow fan, the heat dissipation airflow outlet is arranged facing the axial flow fan, and the airflow flows out from the heat dissipation airflow outlet along the direction of the rotation axis and enters the air duct.

[0018] In one embodiment, the surface of the control board on which the electronic components are laid is parallel to the rotation axis of the fan, and the airflow flows through the surface along the rotation axis and flows out from the heat dissipation airflow outlet.

[0019] In one embodiment, the heat dissipation air inlet and the heat dissipation air outlet are arranged opposite to each other in the direction of the rotation axis, and the air flow enters the heat dissipation air inlet along the longitudinal direction and flows out from the heat dissipation air outlet.

[0020] In one embodiment, the control board is disposed in the rear end housing, the heat dissipation air inlet is opened on the rear end housing, one end of the connecting rod is connected to the heat dissipation air inlet, and the other end is connected to the air inlet.

[0021] In one embodiment, the power access end includes a battery pack interface formed on the rear end housing for plugging in a battery pack, the control board is arranged on one side of the battery pack interface, and the mounting surface of the control board is roughly parallel to the plug-in direction of the battery pack.

[0022] In one embodiment, the power supply input terminal includes two battery pack interfaces formed on the rear end housing and arranged back to back, and the control board is arranged between the two battery pack interfaces.

[0023] In one embodiment, the power input end includes a power socket configured as a male or female power plug, and the power socket is provided on the rear end housing or connected to the rear end housing via an electric wire.

[0024] In one embodiment, the rear housing is formed with a grip portion for user operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 Schematic diagram of the cross-sectional structure of a hair dryer according to an embodiment of the present invention.

[0028] Figure 2 for Figure 1 Cross-sectional view along the AA axis.

[0029] Figure 3 for Figure 1 Side view of the hair dryer shown.

[0030] Figure 4 Schematic diagram of the cross-sectional structure of a hair dryer according to another embodiment of the present invention.

[0031] Figure 5 The figure is a schematic cross-sectional view of a hair dryer according to another embodiment of the present invention.

[0032] Figure 6 Schematic diagram of the cross-sectional structure of a hair dryer according to another embodiment of the present invention.

[0033] Description of reference numerals and components in the accompanying drawings:

[0034] 100. Hair dryer;

[0035] 10. Air duct department;

[0036] 101. Air duct; 102. Air inlet; 103. Air outlet; 104. Left fixing member;

[0037] 1041. Contact part;

[0038] 110. Air inlet; 112. Left housing;

[0039] 120. Air duct department;

[0040] 20. Blower assembly;

[0041] 210, fan; 220, motor;

[0042] 30. Rear housing;

[0043] 301, internal cavity; 302, heat dissipation air inlet; 303, heat dissipation air outlet;

[0044] 310, access port; 320, battery pack interface; 330, compartment; 340, grip;

[0045] 341, switch;

[0046] 40. Connecting rod;

[0047] 401, connection end;

[0048] 50. Control panel;

[0049] 510, power cord; 520, mounting surface;

[0050] 60. Battery pack;

[0051] 70. Backpack power cable;

[0052] 80. Heat sink. DETAILED DESCRIPTION

[0053] The technical solution of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0056] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0057] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0058] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0059] In the art, to dissipate heat from the control board, it is typically placed inside the housing, near the air inlet, allowing air flowing through the air duct to dissipate heat from the control board. However, placing the control board inside the housing increases the overall size of the device; placing the control board near the air inlet reduces the airflow efficiency of the air duct and increases noise.

[0060] To solve the above problems, refer to Figure 1 An embodiment of the present invention discloses a hair dryer 100 that can blow out wind to gather leaves scattered on the ground.

[0061] The hair dryer 100 includes an air duct portion 10, a blower assembly 20 disposed within the air duct portion 10, a rear housing 30, and a connecting rod 40 connecting the air duct portion 10 and the rear housing 30. An air duct 101 is formed within the air duct portion 10. An air inlet 102 and an air outlet 103 of the air duct 101 are formed on the wall of the air duct portion 10. The blower assembly 20 is disposed within the air duct 101 and is used to generate airflow flowing through the air duct 101.

[0062] The blower assembly 20 comprises at least a fan 210 and a motor 220. When the blower assembly 20 is in operation, the motor 220 drives the fan 210 to rotate around the rotation axis X of the fan 210, so that external air enters the air duct 101 from the air inlet 102 and is then blown out from the air outlet 103.

[0063] In a specific solution, the air duct portion 10 includes an air inlet portion 110 and an air duct portion 120 connected to the air inlet portion 110. The air inlet portion 110 is connected to the connecting rod 40. The air inlet 102 is provided in the air inlet portion 110, and the air outlet 103 is provided in the air duct portion 120. The air duct portion 10 as a whole extends in the longitudinal direction, specifically in the direction of the rotation axis X of the fan 210. The blowing assembly 20 is located in the air inlet portion 110, and the air inlet 102 and the air outlet 103 are respectively provided at opposite ends of the air duct portion 10 along the direction of the rotation axis X.

[0064] The rear housing 30 is connected to the air duct portion 10 via a connecting rod 40. The rear housing 30 is connected to a power supply access terminal 310 or is formed with a power supply access terminal 310 for connecting a power source. When specifically configured, the type of the power supply access terminal 310 is not limited, such as Figure 1 As shown, the power input terminal 310 is a power socket configured as a male or female power plug, specifically a male power plug. The power socket is disposed on the rear housing 30. Alternatively, the power input terminal 310 may be a female power plug or a battery pack interface; or the power input terminal 310 may be a power socket fixedly connected to the rear housing 30 via a wire, and the power socket may be a male or female power plug.

[0065] refer to Figure 1 In this embodiment, the rear end housing 30 is configured to have an internal cavity 301, and the control board 50 for controlling the motor 220 is disposed inside the rear end housing 30. In this way, the control board 50 is installed by utilizing the internal space of the rear end housing 30, and 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.

[0066] Furthermore, to dissipate heat from the control board 50, the rear housing 30 is provided with a heat dissipation airflow inlet 302 and a heat dissipation airflow outlet 303, which are connected to its internal cavity 301. This forms a heat dissipation airflow channel between the heat dissipation airflow inlet 302 and the heat dissipation airflow outlet 303. The heat dissipation airflow inlet 300 is used to introduce heat dissipation airflow when the fan 210 rotates. The connecting rod 40 connects the rear housing 30 to the air duct portion 10 while also connecting the heat dissipation airflow outlet 303 to the air duct 101. The control board 50 is located within the heat dissipation airflow channel within the rear housing 30. More specifically, the control board 50 is located within the heat dissipation airflow channel within the rear housing 30 to ensure that at least the heat-generating electronic components of the control board 50 are located within the heat dissipation airflow channel within the rear housing 30, allowing the heat dissipation airflow to dissipate heat from the control board 50.

[0067] Through the above-described method, airflow, namely heat dissipation airflow Y, can flow in from the heat dissipation airflow inlet 302 and out from the heat dissipation airflow outlet 303, thereby dissipating heat from the control board 50. Furthermore, the heat dissipation airflow outlet 303 is connected to the air duct 101. When the blower assembly 20 is operating, the heat dissipation airflow inlet 302 functions as an auxiliary air inlet for the air duct 101, thereby dissipating heat from the control board 50 while also increasing the airflow volume of the hair dryer 100 to a certain extent. Therefore, the control board 50 can be understood as being located near the air inlet of the hair dryer 100. However, this does not affect the air blowing efficiency, but rather improves it.

[0068] In the hair dryer 100, the control board 50 for controlling the motor 220 is disposed inside the rear housing 30. The air duct unit 10 does not require a reserved installation space for the control board 50, thereby reducing the volume of the air duct unit 10. Simultaneously, a heat dissipation airflow channel is formed inside the rear housing 30, and the heat dissipation airflow channel is connected to the air duct 101 within the air duct unit 10. While dissipating heat from the control board 50, the air volume of the hair dryer 100 is increased to a certain extent, thereby improving the air blowing efficiency. Testing has shown that, under the same rated power, the hair dryer employing the above-described scheme has a heat dissipation effect comparable to that of a conventional hair dryer, but can be reduced in volume by 20 to 30%. Furthermore, the air blowing efficiency is slightly higher than that of a conventional hair dryer.

[0069] In some embodiments, the projection of the control panel 50 on a plane perpendicular to the rotation axis X is located within the projection range of the air duct portion 10 on the plane. Figure 1As shown, when the rotation axis X is in 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 panel 50 on the vertical plane is located within the projection of the air duct portion 10 on the vertical plane. In this way, the radial dimension of the control panel 50 does not exceed the high radial dimension of the air duct portion 10, that is, the control panel 50 is arranged in the rear end housing 10 but does not increase the radial dimension of the blower-suction machine, which is conducive to the miniaturization of the blower-suction machine.

[0070] The connecting rod 40 connects the heat dissipation outlet 303 to the air duct portion 10. In one embodiment, the connecting rod 40 is hollow and rod-shaped. The power cord 510, which connects the control panel 50 to the motor 220, passes through the connecting rod 40. This eliminates cluttered wiring from the exterior of the hair dryer 100, ensuring a clean appearance and protecting the power cord 510 from damage caused by external forces. The connecting rod 40 connects the rear housing 30 to the air duct portion 10, separating them by a certain distance to create an air intake space.

[0071] When the air inlet 110 is connected to the connecting rod 40, in order to prevent the connecting rod 40 from affecting the air intake effect of the air inlet 102, the connecting rod 40 is embedded in the air inlet 110. Figure 1 One end of the connecting rod 40 connected to the air inlet portion of the housing 110 is defined as a connecting end 401 , and the connecting end 401 is inserted into the air inlet portion 110 and communicates with the air duct 101 .

[0072] As a preferred solution, the air inlet 120 is arranged around the connection end 401. In this way, the center of the air inlet 110 can receive the airflow blown from the heat dissipation air outlet 303. At the same time, in the circumferential direction around the connection end 401, the air inlet 110 can receive the airflow from the outside world entering through the air inlet 120. After the two flow together, a larger air volume can be formed, providing a greater air intake capacity.

[0073] There is no limitation on the fixing method of the connecting end 401 and the air inlet portion 110. Preferably, the connecting end 401 is embedded in the air inlet portion 110 and is detachably connected to the air inlet portion 110. In one possible embodiment, the air inlet portion 110 is a half-type structure, including a left shell 112 and a right shell (not shown in the cross-sectional schematic diagram) spliced together on the left and right. In this case, the air duct portion 120 can be an integrated type or a half-type. After the connecting end 401 is connected to the air inlet portion 110, the air inlet portion 110 is then connected to the air duct portion 120.

[0074] refer to Figure 1 The left housing 112 is provided with a left fixing member 104, and the air inlet portion of the right housing is provided with a right fixing member. The left fixing member 104 and the right fixing member are spliced together and clamp the connection end 401. The splicing direction of the left fixing member and the right fixing member is perpendicular to the rotation axis X. For details, please refer to Figure 1The cross-sectional diagram shown in FIG. 1 illustrates the cross-sectional structure of the left fixing member 104. The left fixing member 104 has an abutting portion 1041 for clamping the connecting end 401. Figure 1 The structure of the right fixing member shown in the figure is identical to that of the left fixing member 104. When joined, the left and right fixing members 104 and 104 form a cylindrical sleeve. The inner wall of the sleeve has multiple abutment portions 1041. During assembly, the connecting end 410 is first inserted into the left fixing member 104. The left and right housings are then joined together, docking the right fixing member 104 with the left fixing member 104. Finally, the left and right housings are fastened together using fasteners, docking the right fixing member with the left fixing member 104 and securely holding the connecting end 401.

[0075] The connection method between the connecting rod 40 and the rear housing 30 is not limited. In one possible embodiment, the connecting rod 40 and the rear housing 30 are integrally structured. In this way, the connecting rod 40 and the rear housing 30 are detachably assembled with the air duct portion 10, simplifying the assembly process.

[0076] Please refer to Figure 1 The rear housing 30, connecting rod 40, and air duct portion 10 are arranged in sequence along the rotation axis X. The extension direction of the rotation axis X defines the longitudinal 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. The mounting surface 520 is parallel to the rotation axis X. The mounting surface 520 is used to mount various electronic components.

[0077] refer to Figure 2 and Figure 3 In some embodiments, the power supply 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 disposed 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. This achieves a miniaturized rear housing 30, resulting in a smaller volume.

[0078] In specific configuration, the rear housing 30 is provided with a battery pack interface 320 on either side of the control board 50 in the thickness direction. Both battery pack interfaces 320 are inserted and removed parallel to the mounting surface 520 of the control board 50. The two battery pack interfaces 320 are positioned opposite each other on the rear housing 30, with the control board 50 positioned between them. Because the control board 50 is relatively thin, the combined dimensions of the two are small, facilitating the miniaturization of the rear housing 30.

[0079] In other embodiments, the battery pack interface 320 may be provided on only one side of the control board 50. Figure 1When the battery pack 60 is attached, it is assembled to the battery pack interface 320 in a direction parallel to the mounting surface 520. This means that the battery pack 60 is assembled to the rear housing 30 along the length of the hair dryer 100. Once 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. Due to the relatively thin control board 50, the stacked dimensions of the two are small, facilitating the miniaturization of the rear housing 30.

[0080] Based on the above embodiments, there are many specific configuration methods for the control panel 50. Figure 1 The diagram illustrates a normal operating position of the hair dryer 100. The lengthwise direction (or longitudinal direction) of the hair dryer 100 extends horizontally, and the control panel 50 is positioned vertically. Typically, the vertical direction also corresponds to the height direction of the hair dryer 100. In other words, the height direction of the control panel 50 coincides with that of the hair dryer 100. As a result, the projections of the control panel 50 and the housing 10 on a plane parallel to the vertical direction overlap, resulting in a smaller height dimension for the hair dryer 100.

[0081] As a specific solution, refer to Figure 2 and Figure 3 Battery pack interfaces 320 are located on both sides of the control panel 50, and each interface 320 is equipped with a 20V battery pack 60. In practice, the blower assembly 20 requires a 40V operating voltage. However, using a single battery pack would be bulky and heavy, making replacement difficult and potentially leading to an uneven weight distribution across the entire unit. Therefore, a 20V battery pack is installed on each side of the control panel 50 to meet the required operating voltage. The symmetrical arrangement of the two battery packs 60 ensures balanced weight distribution and facilitates easy handling.

[0082] Please refer to Figure 4 In another embodiment, the length of the hair dryer 100 extends horizontally, and the control board 50 is positioned horizontally. The battery pack 60 is only provided on one side of the control board 50, specifically below the control board 50. The battery pack 60 is assembled to the rear housing 30 parallel to the control board 50. After the battery pack 60 is assembled to the rear housing 30, it and the control board 50 are stacked in the thickness direction of the control board 50. Due to the relatively small thickness of the control board 50, the stacked dimensions of the two are small, facilitating the miniaturization of the rear housing 30.

[0083] like Figure 1As shown, the rear housing 30 includes a compartment 330 forming a receiving chamber 301 and a grip portion 340. The compartment 330 is connected to the connecting rod 40. One end of the grip portion 340 is connected to the compartment 330, and the other end of the grip portion 340 is away from the compartment 330 along the rotation axis X. The grip portion 340 is for a user to hold and operate. Furthermore, a switch 341 for controlling the motor 220 can be provided on the grip portion 340 to facilitate control of the motor 220.

[0084] In the above embodiment, since the rear housing 30, the connecting rod 40, and the air duct portion 10 are arranged in sequence along the aforementioned longitudinal direction, that is, along the rotation axis X, the arrangement of the grip portion 340 utilizes the existing longitudinal dimension of the hair dryer 100 and does not further increase the longitudinal dimension. As a specific solution, refer to Figure 1 The other end of the handle 340 extends above the air inlet 110 of the air duct 10. This balances the weight of the handle 340, which offsets the added weight of the rear housing 30 caused by the battery pack 60, resulting in a more even weight distribution. Once the battery pack 60 is installed on the rear housing 30, the user can grip the handle 340, and the hair dryer 100 can be used as a handheld hairdryer.

[0085] Furthermore, in the art, the handle of a blower is typically connected to the housing. Since the housing has an air outlet, safety regulations require that the distance between the handle and the outlet be greater than 0.7 mm. To meet safety regulations during operation, the air duct is typically lengthened, so that the air outlet on the duct is farther from the handle. However, this approach results in an excessively long air duct. Furthermore, since the blower assembly is typically located inside the housing below the handle, significant airflow loss occurs within the duct, reducing the efficiency of the blower.

[0086] In an embodiment of the present invention, a connecting rod 40 is used to connect the rear end housing 30 and the air duct portion 10. 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 this arrangement, the grip portion 340 is farther away from the air outlet 103. When the user uses the hair dryer 100, the hand is at a position farther away from the air outlet 103. Therefore, compared with the conventional technology, in the present invention, the safety requirements are met but there is no need to extend the air duct portion. The blower assembly 20 can be arranged closer to the air outlet 130, that is, the blower assembly 20 is placed in front. In this way, the air flow has less loss when flowing in the air duct portion, thereby ensuring the blowing efficiency of the hair dryer 100.

[0087] The structure of the rear end housing 30 is not limited to the above embodiment. Figure 5As shown, in another embodiment, the rear end housing 30 includes a partition 330 and a gripping portion 340 that form a accommodating cavity 301, wherein the partition 330 is connected to the connecting rod 40, one end of the gripping portion 340 is connected to the partition 330, and the gripping portion 340 extends obliquely upward from the partition 330. An access end 310 is provided at the end of the rear end housing 30 away from the connecting pipe 40, and the access end 310 is a power socket fixedly connected to the rear end 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 gripping portion 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.

[0088] 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 accommodating cavity 301. The gripping portion 340 connects the partition 330 and the connecting rod 40 in the middle. The gripping portion 340 also connects the heat dissipation airflow outlet 303 and the connecting rod 40.

[0089] In this embodiment, the compartment 330, the grip 340, the connecting rod 40, and the air duct portion 10 are arranged in sequence. The central axes of the grip 340, the connecting rod 40, and the air duct portion generally coincide. While providing a gripping function, the grip 340 also extends the length of the hair dryer 100, thereby expanding the operating radius of the hair dryer 100. Furthermore, in this embodiment, a switch 341 for controlling the motor 210 is provided on the grip 340. The switch 341 is provided on the grip 340 to facilitate the control of the motor 210 on and off.

[0090] refer to Figure 1 and Figure 3 The end of the rear housing 30, away from the connecting rod 40, is provided with a power supply connection port 310. This connection port 310 is specifically a male power plug for connecting to the backpack power cable 70. Once the hair dryer 100 is attached to the shoulder strap, the user can carry the hair dryer 100 and connect the backpack power cable 70 to the connection port 310, allowing the hair dryer 100 to function as a backpack hair dryer.

[0091] In this embodiment, the connecting rod 40 has a predetermined length so that the grip portion 340 and the air duct portion 10 are separated by a predetermined distance in the longitudinal direction. Similarly, the blower assembly 20 can be positioned closer to the air outlet 130, i.e., the blower assembly 20 is positioned in front of the air outlet 130. This reduces airflow losses while flowing through the air duct portion, thereby ensuring the efficiency of the hair dryer 100.

[0092] In the above embodiment, the control board 50 is disposed in the rear housing 30 and spaced apart from the air duct unit 10. This allows the air duct unit 10 to be more compact without being affected by the control board 50. However, since the control board 50 is relatively far from the blower assembly 20, heat dissipation of the control board 50 may be affected.

[0093] To address this issue, the inventors have made further improvements. In some embodiments, the fan 210 is specifically an axial flow fan, and the heat dissipation airflow outlet 303 is positioned facing the axial flow fan. The heat dissipation airflow flows out of the heat dissipation airflow outlet 303 along the direction of the rotation axis X and enters the air duct portion 10. The heat dissipation airflow inlet 302 and heat dissipation airflow outlet 303 are positioned along the axis of the fan 210, allowing the heat dissipation airflow to flow along the rotation axis X. This allows the axial flow fan to generate more heat dissipation airflow during operation, improving the heat dissipation effect.

[0094] Furthermore, in some embodiments, the heat dissipation airflow inlet 302 and the heat dissipation airflow outlet 303 are sequentially arranged along the axis of the fan 210, allowing the heat dissipation airflow to flow along the rotation axis X. Furthermore, the mounting surface 520 of the control board 50, on which the electronic components are mounted, is parallel to the rotation axis X of the fan 210. In this manner, the axial flow fan generates a large heat dissipation airflow, and the heat dissipation airflow Y entering the heat dissipation airflow inlet 302 can be blown directly along a straight path toward the electronic components on the control board 50, quickly removing the heat generated by the electronic components and achieving high heat dissipation efficiency.

[0095] Furthermore, the heat dissipation air inlet 302 and the heat dissipation air outlet 303 are arranged at opposite ends of the rear housing 30 along the aforementioned longitudinal extension direction, and the heat dissipation airflow enters the heat dissipation air inlet 302 and flows along a straight path to the heat dissipation air outlet 303. By the above means, the entire heat dissipation airflow channel is along the direction of the rotation axis X, and the airflow can flow more smoothly. When the fan 210 rotates, refer to Figure 1 The heat dissipation airflow Y entering from the heat dissipation airflow inlet 302 can be quickly blown toward the control board 50 along a straight path, with high heat dissipation efficiency.

[0096] Based on the above examples, please refer to Figure 1 To improve heat dissipation from the control board 50, a heat sink 80 is located within the rear housing 30. This heat sink 80 is located within the heat dissipation airflow path and contacts the electronic components connected to the control board 50 to exchange heat. Heat sink 80 is constructed from a material with high thermal conductivity, such as aluminum, to ensure effective heat dissipation.

[0097] The shape of the heat sink 80 itself and its installation method within the rear housing 30 are not limited. In one possible embodiment, the heat sink 80 is fixed in the heat dissipation airflow channel of the rear housing 30, and the heat sink has a slot in which the control board 50 is fixed. The heat sink 80 can be specifically configured to be U-shaped. In this embodiment, the control board 50 is fixed to the heat sink 80 by being clamped and fixed to the rear housing 30. The rear housing 30 only needs to consider how to fix the heat sink 80, which simplifies the internal structure of the rear housing 30.

[0098] In another possible embodiment, the heat sink 80 is box-shaped, forming a heat sink. The control board 50 is placed inside the heat sink 80, and the electronic components mounted on the control board 50 are in contact with the inner wall of the heat sink 80. Through this method, the heat generated by the control board 50 is transferred to the heat sink 80, which effectively increases the heat dissipation area of the control board 50 and improves heat dissipation efficiency. Furthermore, in this embodiment, heat dissipation holes can be provided in the heat sink 80, allowing the heat dissipation airflow Y to still pass through the interior of the heat sink 80, thereby greatly improving the heat dissipation efficiency of the control board 50.

[0099] In this embodiment, the rear housing 30 further includes a heat sink 80 for accommodating the control board 50. To improve heat dissipation efficiency, the heat dissipation airflow inlet 302 is positioned on the rear housing 30 directly opposite the heat sink 80. When the hair dryer 100 is operating, the heat dissipation airflow Y entering the rear housing 30 through the heat dissipation airflow inlet 302 is blown onto the heat sink 80, thereby quickly removing heat generated by the control board 50 and improving heat dissipation efficiency.

[0100] Furthermore, the heat dissipation airflow inlet 302 includes multiple heat dissipation grilles or heat dissipation grids. Specifically, the multiple heat dissipation airflow inlets 302 all face the heat dissipation element 80. By providing multiple heat dissipation grilles or heat dissipation grids, the flow area between the heat dissipation element 80 and the external airflow is increased, thereby improving heat dissipation efficiency.

[0101] In the above embodiment, the heat dissipation airflow inlet 302 is provided in the rear end housing 30, and the control panel 50 is provided inside the rear end housing 30. In other embodiments, the heat dissipation airflow inlet 302 may also be provided on the connecting rod 40, such as on the outer wall of the end of the connecting rod 40 away from the air duct portion 10. The heat dissipation airflow outlet 303 is still located at the end of the connecting rod 50 close to the air duct portion 10. In other words, the heat dissipation airflow channel can be located inside the connecting rod 40, and accordingly, the control panel 50 is also provided inside the connecting rod 40. The control panel 50 is also provided inside the connecting rod 40, and the control panel 50 is spaced apart from the air duct portion 10, which also does not affect the volume of the air duct portion 10, and is conducive to miniaturization of the blower-suction machine.

[0102] Furthermore, when the control board 50 is disposed within the connecting rod 40, the fan 210 is specifically an axial flow fan, and the heat dissipation airflow outlet 303 is disposed facing the axial flow fan. The heat dissipation airflow flows out of the heat dissipation airflow outlet 303 along the direction of the rotation axis X and enters the air duct portion 10. The heat dissipation airflow inlet 302 and the heat dissipation airflow outlet 303 are disposed along the axis of the fan 210, so that the heat dissipation airflow flows along the direction of the rotation axis X. In this way, the axial flow fan can generate more heat dissipation airflow when in operation, thereby improving the heat dissipation effect.

[0103] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hair dryer, comprising: An air duct portion, having an air inlet and an air outlet; an air blowing assembly, disposed in the air duct portion, comprising a fan and a motor driving the fan to rotate around a rotation axis of the fan; The rear housing is provided with a power supply access terminal; It is characterized in that the hair dryer also includes a connecting rod and a control board that controls the motor, one end of the connecting rod is connected to the rear end housing, the other end of the connecting rod is connected to the air duct part, and the control board is arranged in the rear end housing.

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

3. The hair dryer according to claim 1, wherein The power supply input terminal includes a battery pack interface formed on the rear housing for plugging in a battery pack, and the control board is arranged on one side of the battery pack interface; or, The power supply input end includes two battery pack interfaces formed on the rear end housing and arranged back to back, and the control board is arranged between the two battery pack interfaces.

4. The hair dryer according to claim 1, wherein A heat dissipation air inlet and a heat dissipation air outlet are formed on the rear end housing. The air flow path from the heat dissipation air inlet to the heat dissipation air outlet forms a heat dissipation air flow channel. The control board is located in the heat dissipation air flow channel. The heat dissipation air flow enters from the heat dissipation air inlet, flows through the control board, and flows out from the heat dissipation air flow outlet.

5. The hair dryer according to claim 4, characterized in that An air duct is formed in the air duct portion, the fan is an axial flow fan, the heat dissipation airflow outlet is arranged facing the axial flow fan, and the heat dissipation airflow flows out from the heat dissipation airflow outlet and enters the air duct.

6. The hair dryer according to claim 5, characterized in that: The surface of the control board on which the electronic components are laid is parallel to the rotation axis direction of the fan, and the heat dissipation airflow flows through the surface along the rotation axis direction and flows out from the heat dissipation airflow outlet.

7. The hair dryer according to claim 5, characterized in that: The connecting rod is a hollow structure, and the connecting rod connects the heat dissipation air flow outlet and the air duct.

8. The hair dryer according to claim 1 or 4, characterized in that: A heat dissipation airflow outlet is formed on the rear end housing. A heat dissipation member for accommodating the control board is also provided in the rear end housing. The heat dissipation member is in contact with electronic components connected to the control board.

9. A hair dryer comprising: An air duct portion, having an air inlet and an air outlet; an air blowing assembly, disposed in the air duct portion, comprising an axial flow fan and a motor driving the axial flow fan to rotate around a rotation axis; The rear housing is provided with a power supply access terminal; Characterized in that the hair dryer also includes: a connecting rod, one end of which is connected to the rear housing, the other end of which is connected to the air duct portion, and a heat dissipation airflow channel is provided inside the connecting rod; a control board for controlling the motor, wherein the control board is disposed in the heat dissipation airflow channel inside the connecting rod and is configured to be spaced apart from the air duct portion; The heat dissipation airflow channel includes a heat dissipation airflow outlet, which is located at one end of the connecting rod close to the air duct portion. The rotation of the axial flow fan drives the heat dissipation airflow to flow out of the heat dissipation airflow outlet and into the air duct portion.

10. The hair dryer according to claim 9, characterized in that The heat dissipation airflow channel includes a heat dissipation airflow inlet, and the heat dissipation airflow inlet is arranged on the rear end housing or the connecting rod.

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