Hair dryer

Abstract

This invention relates to a hair dryer, comprising an axially extending housing, a battery pack detachably connected to the housing, a power assembly at least partially housed within the housing, and a duct assembly connected to the housing. The housing includes a connecting portion located at the axial front end and connected to the duct assembly, a mounting portion located at the axial rear end and connected to the battery pack, and a body portion located between the connecting portion and the mounting portion. The power assembly includes a motor and a fan driven by the motor to rotate, the fan rotation generating airflow through the interior of the duct assembly. The body portion has an air inlet located at the axial rear end, the air inlets being approximately located on opposite sides of the mounting portion in a transverse direction perpendicular to the axial direction, thereby improving air intake efficiency while cooling the battery pack.

Description

Technical Field

[0001] This invention relates to a hair dryer, and more particularly to a hair dryer that improves air intake efficiency while dissipating heat from the battery pack. Background Technology

[0002] A hair dryer is a common gardening tool. It consists of a housing, a duct connected to the housing, a conduit housed within the housing, a motor located within the conduit, and a fan driven by the motor. During use, the fan's rotation creates negative pressure inside the housing, drawing in outside air through the housing's inlet and out through the duct's outlet, thus blowing fallen leaves or dust to a specific location. Currently, to prevent debris from entering the housing due to the negative pressure generated by the fan, a detachable air inlet cover with a grille is usually installed at the air inlet. This increases the number of parts, leading to more assembly steps and thus higher material and assembly costs.

[0003] With the rapid development of the market, users have increasingly higher performance requirements for hair dryers, mainly focusing on blowing power, wind speed, and battery life. To improve these performance aspects, it is often necessary to increase the area of ​​the air inlet, use a high-speed motor, or a large-capacity battery pack. Currently, some hair dryers on the market have begun to use high-speed motors or large-capacity battery packs. However, high-speed motors and large-capacity battery packs generate a lot of heat during operation, making heat dissipation difficult for the motor and battery pack.

[0004] Therefore, it is indeed necessary to provide an improved hair dryer to overcome the shortcomings of the existing technology. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a hair dryer that can improve air intake efficiency while dissipating heat from the battery pack.

[0006] The present invention addresses the problems of the prior art by adopting the following technical solution: A hair dryer includes a housing extending axially, a battery pack detachably connected to the housing, a power component at least partially housed within the housing, and a duct assembly connected to the housing. The housing includes a connecting portion located at the axial front end and connected to the duct assembly, a mounting portion located at the axial rear end and connected to the battery pack, and a body portion located between the connecting portion and the mounting portion. The power component includes a motor located at least partially within the body portion and a fan driven to rotate by the motor. The rotation of the fan generates airflow passing through the interior of the duct assembly. The body portion has an air inlet located at the axial rear end, and the air inlet is generally located on opposite sides of the mounting portion in a transverse direction perpendicular to the axial direction.

[0007] A further improvement is as follows: the airflow enters the housing from the air inlet, and in the direction of airflow flow, the battery pack is at least partially exposed to the airflow upstream of the air inlet.

[0008] A further improvement is as follows: the main body includes a receiving wall connected to the mounting part, the air inlet is approximately parallel to or aligned with the receiving wall in the axial direction, and the air inlet is approximately located on both sides of the receiving wall in the transverse direction.

[0009] A further improvement is as follows: the housing includes a handle portion connecting the body portion and the mounting portion; the receiving wall is generally closed in the axial direction and includes a first side wall facing the handle portion and a second side wall facing the battery pack; in the vertical direction perpendicular to the axial and transverse directions, the first side wall and the second side wall are located on opposite sides of the mounting portion.

[0010] A further improvement is as follows: the air inlet includes a first air inlet area located on both sides of the first sidewall and a second air inlet area located on both sides of the second sidewall, wherein the angle formed between the flow direction of the airflow entering from the first air inlet area and the flow direction of the airflow entering from the second air inlet area is less than or equal to 90°.

[0011] A further improvement is as follows: the receiving wall includes a third sidewall connected to the second sidewall, the first sidewall and the third sidewall are respectively located on both sides of the second sidewall in the vertical direction, the air inlet includes a third air inlet area located on both sides of the third sidewall in the lateral direction, and the angle formed between the flow direction of the airflow entering from the third air inlet area and the flow direction of the airflow entering from the second air inlet area is less than or equal to 90°.

[0012] A further improvement is as follows: the blower includes several guide sections spaced apart at the air inlet, the air inlet includes at least two air inlet areas that open in different directions, the included angle between the extending directions of the guide sections of two adjacent air inlet areas is less than or equal to 90°, and the guide sections and the main body are integral components.

[0013] A further improvement is that the main body has a roughly closed structure in the circumferential direction perpendicular to the axial direction.

[0014] The present invention can also solve the problems of the prior art by adopting the following technical solution: a hair dryer, including a housing extending along the axial direction, a battery pack detachably connected to the housing, a power component at least partially housed in the housing, and a duct assembly connected to the housing. The housing includes a connecting part connected to the duct assembly, a body part connected to the axially rear side of the connecting part, and a mounting part for connecting the battery pack and connected to the body part. The power component includes a motor located at least partially in the body part and a fan driven to rotate by the motor. The rotation of the fan generates airflow passing through the interior of the duct assembly. The body part is provided with an air inlet located at the axially rear end, and the air inlet is located on opposite sides of the mounting part in a transverse direction perpendicular to the axial direction.

[0015] A further improvement is that the total circumference of the air inlet in the circumferential direction perpendicular to the axial direction is greater than or equal to 90°.

[0016] Compared with the prior art, the present invention has the following beneficial effects: an air inlet that is fluidly connected to the outside is provided at the axial rear end of the main body. The air inlet is located on both sides of the mounting part for mounting the battery pack in the lateral direction, so that at least part of the airflow flows over the surface of the battery pack before entering the air inlet, thereby dissipating heat from the battery pack during the operation of the blower; in addition, air inlets are provided in at least three areas at the axial rear end of the main body, and the angle formed between the airflow directions of two adjacent air inlet areas is less than or equal to 90°, which reduces the collision loss when the airflow merges between different air inlet areas, thereby increasing the air inlet area and improving the air inlet efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the hair dryer according to a preferred embodiment of the present invention;

[0018] Figure 2 for Figure 1 The image shows a front view of a hair dryer after the blower tube has been removed.

[0019] Figure 3 for Figure 2 The hairdryer shown is viewed from below.

[0020] Figure 4 for Figure 2 The right view of the hair dryer shown;

[0021] Figure 5 for Figure 2 The cross-sectional view of the hair dryer shown;

[0022] Figure 6 This is a partially exploded view of a hair dryer according to another embodiment of the present invention;

[0023] Figure 7 for Figure 6The diagram shows the structure of the hair dryer after the air guide cover has been disassembled.

[0024] Figure 8 for Figure 6 The image shows a cross-sectional view of a hair dryer.

[0025] Meaning of the reference numerals in the diagram:

[0026] Hair dryer 100, housing 10, 10' Connecting parts 11, 11' Body parts 12, 12' Air inlet 121, 121' Support wall 122, 122' Expanded wall 123 First expansion section 124 Second diameter expansion section 125, arc section 126 First sidewall 127, 127' Second sidewall 128, 128' Third sidewall 129, 129' Mounting part 13, 13' Guide rail 131 Handle section 14, 14' Support section 15 Front section 151 Rear section 152 Middle section 153 Middle groove 154, notch 155 Flow guide 16 Fixing part 17' Annular groove 171' Power assembly 20, 20'

[0027] Motors 21, 21' and drive shafts 211, 211' Fan 22, 22', Wheel hub 221 Fan blade 222 Motor housing 23 24 Guide cone, 30 duct assembly Air blower duct 31, air outlet 311 Air inlet duct 32, 32'; Housing 321, 321' Guide vane 322, drainage section 323, 323' Hook 324' Base 325' Hook section 326' Reinforcing section 327' 33' shroud axial opening 331' Axial outlet 332' Cover section 333' Positioning part 334', Slot 335'

[0028] Recess 336' First inclined guide 337'

[0029] Second tilting guide 338' pop-out structure 40

[0030] Rotating rod 41, elastic element 42

[0031] Bump 43 Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0033] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," and "rear" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0034] Please refer to Figures 1 to 5 As shown, the present invention relates to a hair dryer 100, including a housing 10 extending axially, a battery pack (not shown) detachably connected to the housing 10, a power assembly 20 at least partially housed within the housing 10, and a duct assembly 30 detachably connected to the housing 10.

[0035] The housing 10 includes a connecting portion 11 connected to the duct assembly 30 at its axial front end, a body portion 12 connected to the axial rear side of the connecting portion 11, and a mounting portion 13 for connecting a battery pack and connected to the body portion 12. The battery pack is detachably connected to the mounting portion 13 along the axial direction. In the axial direction, the connecting portion 11, the body portion 12, and the mounting portion 13 are arranged sequentially. The housing 10 includes a handle portion 14 connected at one end to the top of the body portion 12 and at the other end to the top of the mounting portion 13. The handle portion 14 extends upward and is spaced apart from the body portion 12 and the mounting portion 13 to form a gripping space for the user to hold.

[0036] The duct assembly 30 includes a blower duct 31 detachably connected to the connector 11 and an inlet duct 32 at least partially housed within the housing 10. The blower duct 31 and the inlet duct 32 together form an internal airflow channel. The inlet duct 32 includes a housing 321 fixed to the interior of the housing 10, and the power assembly 20 is at least partially housed within the housing 321. The power assembly 20 includes a motor 21 with a drive shaft 211 and a fan 22 driven to rotate by the motor 21. The rotation of the fan 22 generates airflow through the channel of the duct assembly 30.

[0037] The power assembly 20 also includes a motor housing 23 that at least partially houses the motor 21 and a guide cone 24 connected to the axial front end of the motor housing 23. The motor 21 is housed within the internal space formed by the motor housing 23 and the guide cone 24. The guide cone 24 is configured as a tapered structure that gradually slopes towards the drive shaft 211 from rear to front. The drive shaft 211 extends axially rearward out of the motor housing 23. The fan 22 includes a hub 221 fixed to the drive shaft 211 extending out of the motor housing 23 and several fan blades 222 extending from the outer periphery of the hub 221 into a channel. A generally annular airflow channel is formed between the motor housing 23 and the outer casing 321 of the air inlet duct 32. The blower 100 also includes a stationary guide vane 322 connected between the outer casing 321 and the motor housing 23. In the airflow direction, the stationary guide vane 322 is located downstream of the fan blades 222.

[0038] Please refer to Figure 1 and Figure 2 As shown, the housing 10 includes a support portion 15 located at the bottom of the body portion 12 to support the entire device. Axially, the extension length of the support portion 15 substantially covers the entire axial length of the body portion 12. In the vertical direction perpendicular to the axial direction, the handle portion 14 and the support portion 15 are located on opposite sides of the body portion 12. The mounting portion 13 extends substantially axially to allow the battery pack to be slidably connected axially to provide power to the power assembly 20.

[0039] The main body 12 has an air inlet 121 at its axial rear end, and the air outlet 31 includes an air outlet 311 located at its axial front end. Figure 5 As shown, when the blower 100 is running, the drive shaft 211 rotates, causing the fan blades 222 to rotate and generating negative pressure in the channel. Under the action of air pressure, outside air enters the main body 12 from the air inlet 121 and then into the channel of the air inlet pipe 32. After being accelerated by the rotation of the fan blades 222, it is combed by the stationary guide vanes 322 into an airflow that is basically parallel to the axial direction. Then, it is guided by the guide cone 24 into the blower pipe 31 and blown out from the air outlet 311. In the axial direction, the blower pipe 31, the air inlet pipe 32, and the mounting part 13 are basically aligned, so that the airflow does not change its flow direction after entering the housing 10. In addition, the airflow flows through the battery pack at least partially before entering the housing 10 to cool the battery pack.

[0040] Mounting part 13 is connected to the axial rear end of body part 12. Body part 12 includes a receiving wall 122 located at the axial rear end and an expansion wall 123 connecting the connecting part 11 and the air inlet 121. In the transverse direction perpendicular to the axial direction, the size of the expansion wall 123 is larger than the size of the receiving wall 122. The air inlet 121 is disposed on the protruding area of ​​the expansion wall 123 that protrudes laterally from the receiving wall 122. In the transverse direction perpendicular to the axial direction, the air inlet 121 is approximately located on both sides of the receiving wall 122 and the air inlet 121 is substantially aligned with the receiving wall 122 in the axial direction.

[0041] Combination Figure 3 and Figure 4 As shown, the air inlet 121 is located axially between the mounting portion 13 and the connecting portion 11, and is generally located on both sides of the mounting portion 13 in the transverse direction. The vertical projection of the air inlet 121 at least partially coincides with the vertical projection of the handle portion 14, and the axial projection of the air inlet 121 at least partially coincides with the axial projection of the battery pack. This arrangement allows the battery pack to be at least partially exposed in the airflow direction upstream of the air inlet 121. In other words, the airflow flows at least partially over the surface of the battery pack and around the surface of the battery pack before passing through the air inlet 121, thereby cooling the battery pack while the blower 100 is running.

[0042] refer to Figure 1 and Figure 4 As shown, the expansion wall 123 is configured to extend outward from both sides of the body portion 12 laterally, including a first expansion section 124 extending laterally outward from the top of the body portion 12, a second expansion section 125 extending laterally outward from the bottom of the body portion 12, and an arc section 126 connecting the first expansion section 124 and the second expansion section 125. Viewed from the rear to the front axially, the sum of the circumferential arcs of the expansion walls 123 on both sides of the body portion 12 is greater than or equal to 90°. After multiple tests, when the ratio of the maximum lateral dimension of the air inlet 121 to the maximum lateral dimension of the body portion 12 (the area of ​​the arc section 126 of the expansion wall 123) is greater than or equal to 0.1, and the sum of the circumferential arcs occupied by the air inlet 121 in the circumferential direction perpendicular to the axial direction is greater than or equal to 90°, and other influencing factors remain unchanged, the blowing efficiency of the blower 100 can meet the needs of most working scenarios in the market.

[0043] The receiving wall 122 includes a first sidewall 127 facing the handle portion 14 and a second sidewall 128 facing the battery pack. Vertically, the mounting portion 13 extends axially rearward from the center of the receiving wall 122. The first sidewall 127 and the second sidewall 128 are located on opposite sides of the mounting portion 13. The second sidewall 128 extends vertically along the bottom side of the mounting portion 13 and is substantially perpendicular to it. The first sidewall 127 extends forward and upward from the top of the mounting portion 13 to the front end of the handle portion 14. The receiving wall 122 also includes a third sidewall 129 connected to the second sidewall 128. The first sidewall 127 and the third sidewall 129 are located on opposite sides of the second sidewall 128 in the vertical direction and are substantially symmetrically arranged relative to the second sidewall 128.

[0044] The air inlet 121 includes a first air inlet area Z1 parallel to or flush with the first sidewall 127, a second air inlet area Z2 parallel to or flush with the second sidewall 128, and a third air inlet area Z3 parallel to or flush with the third sidewall 129. Vertically, the first air inlet area Z1 and the third air inlet area Z3 are connected to the vertical sides of the second air inlet area Z2. The first air inlet area Z1 is approximately located on the horizontal sides of the first sidewall 127, the second air inlet area Z2 is approximately located on the horizontal sides of the second sidewall 128, and the third air inlet area Z3 is approximately located on the horizontal sides of the third sidewall 129. The angle between the first air inlet area Z1 and the second air inlet area Z2 is greater than or equal to 90°, and the angle between the third air inlet area Z3 and the second air inlet area Z2 is also greater than or equal to 90°.

[0045] The hair dryer 100 also includes several air guides 16 spaced apart at the air inlet 121. These spaced-apart air guides 16 prevent external debris from entering the housing 10 and damaging the power assembly 20. Furthermore, the spaced air guides 16, each extending through the air inlet 121, guide and organize the airflow entering the air inlet 121. Each air inlet area of ​​the air inlet 121 is provided with several spaced air guides 16. In this embodiment, the extension direction of the air guides 16 is approximately perpendicular to the overall contour area of ​​the air inlet area, such that the angle between the extension directions of adjacent air guides 16 in the air inlet areas is less than or equal to 90°. Of course, in other embodiments, the extension direction of the air guides 16 may not be perpendicular to the overall contour area of ​​the air inlet area.

[0046] The air guide section 16 is integrally formed with the main body section 12, avoiding the need for additional air guide covers and increasing mold, material, and assembly costs. The extension direction of the air guide section 16 in the first air inlet area Z1 is approximately perpendicular to the first side wall 127; the axial extension direction of the air guide section 16 in the second air inlet area Z2 is approximately parallel to the insertion and removal direction of the battery pack, which is approximately perpendicular to the second side wall 128; the extension direction of the air guide section 16 in the third air inlet area Z3 is approximately perpendicular to the third side wall 129. The angle between the extension directions of the guide sections 16 of two adjacent air intake areas is less than or equal to 90°, so that the angle between the flow direction of the airflow entering from the first air intake area Z1 and the flow direction of the airflow entering from the second air intake area Z2 is less than or equal to 90°, and the angle between the flow direction of the airflow entering from the third air intake area Z3 and the flow direction of the airflow entering from the second air intake area Z2 is less than or equal to 90°. The angle between the airflows entering from the three air intake areas is small, which avoids the generation of more turbulence when multiple airflows from different directions converge, which would affect the loss of some airflow, thereby increasing noise and reducing air intake efficiency.

[0047] Combination Figures 3 to 5 As shown, the rear end of the air inlet duct 32 is attached to the inner side of the expansion wall 123. The rear end of the air inlet duct 32 is provided with a guide portion 323, which is configured as a conical ring. That is, in the axial direction, the diameter of the guide portion 323 gradually decreases from rear to front, so that the airflow of the main body 12 can be effectively guided into the air inlet duct 32 before passing through the power component 20. The air inlet 121 is axially spaced from the guide portion 323 by the length of the expansion wall 123, so that the airflow has a longer distance after entering the main body 12 to tend to the axial airflow, avoiding the formation of too many vortices impacting the inner side of the main body 12 and increasing noise, while also improving the air intake efficiency.

[0048] The mounting portion 13 extends axially rearward from the top end of the second sidewall 128 and forms a guide rail 131 on its lower surface for guiding the installation or removal of the battery pack. The second sidewall 128 is provided with a pop-out structure 40 for the battery pack. This pop-out structure 40 includes a rotating rod 41 rotatably fixed to the second sidewall 128 and an elastic member 42 retractably fixed within the second sidewall 128. The end of the rotating rod 41 has a protrusion 43 protruding from the second sidewall 128. The elastic member 42 presses against the rotating rod 41, causing the protrusion 43 to always have a tendency to protrude from the second sidewall 128. When the battery pack is unlocked, the protrusion 43 presses against the battery pack and pops the mounting portion 13 axially.

[0049] The support portion 15 includes a front portion 151 connected to the axial front end of the main body portion 12, a rear portion 152 connected to the bottom end of the third side wall 129, and a middle portion 153 connecting the front portion 151 and the rear portion 152. The middle portion 153 has a middle groove 154, and the extension wall 123 of the main body portion 12 has several spaced-apart air inlets corresponding to the middle groove 154. The rear portion 152 has a notch 155, and the main body portion 12 also has several spaced-apart air inlets corresponding to the notch 155. By providing several spaced-apart air inlets at the bottom of the main body portion 12 and the rear portion 152, the air intake area is increased, and the blowing efficiency is improved. The third air intake area Z3 of the air inlet 121 is approximately located on both sides of the notch 155 in the rear portion 152.

[0050] In this embodiment, the extension wall 123 of the main body 12 is generally closed in the circumferential direction perpendicular to the axial direction, and the receiving wall 122 is also generally closed in the axial direction. The term "generally closed" means that it can be completely closed, that is, there is no fluid communication with the outside; or a small number of openings can be provided on it to allow small airflow to pass through the inside and outside of the housing 10.

[0051] In the above embodiment, the battery pack is axially mounted on the rear side of the second side wall 128 of the receiving wall 122. In other embodiments, the mounting portion 13 can be configured to extend from the first side wall 127 of the receiving wall 122 toward the outside or inside of the housing 10, such that the battery pack at least partially overlaps with the main body 12 in the vertical direction, while the rest of the structure remains unchanged. That is, the air inlet 121 is still located on both sides of the mounting portion 13 in the lateral direction. This configuration can further reduce the axial dimension of the entire machine while ensuring air intake efficiency and cost. The insertion and removal direction of the battery pack can be vertical or an inclined direction intersecting the axial direction.

[0052] The main body 12 of the present invention has an air inlet 121 that is fluidly connected to the outside at its axial rear end. The air inlet 121 is located on both sides of the mounting part 13 for mounting the battery pack in the lateral direction, so that at least part of the airflow flows over the surface of the battery pack before entering the air inlet 121, thereby dissipating heat from the battery pack during the operation of the blower 100. In addition, the present invention has air inlets 121 on the first side wall 127, the second side wall 128 and the third side wall 129 at the axial rear end of the main body 12, thereby increasing the air intake area; and the first side wall 127 is provided with an air inlet 121 on the first side wall 127, the second side wall 128 and the third side wall 129 at the axial rear end of the main body 12, thereby increasing the air intake area. The angle between wall 127 and the second side wall 128 is greater than or equal to 90°, and the angle between the third side wall 129 and the second side wall 128 is also greater than or equal to 90°. After the airflow is guided by the guide section 16, the angle between the airflow direction of the first air inlet area Z1 and the airflow direction of the second air inlet area Z2 is less than or equal to 90°, and the angle between the airflow direction of the third air inlet area Z3 and the airflow direction of the second air inlet area Z2 is less than or equal to 90°, thereby reducing the collision loss when airflows of different flow directions converge to improve air intake efficiency.

[0053] Figures 6 to 8 Another embodiment of the hair dryer of the present invention is disclosed, including a housing 10' extending axially and a duct assembly detachably connected to the housing (see reference). Figure 1 The power assembly 20', which is at least partially housed within the housing, and the battery pack (not shown) that provides energy.

[0054] The housing 10' includes a connecting portion 11' that connects to the duct assembly at its axial front end, a body portion 12' connected to the axial rear side of the connecting portion 11', and a mounting portion 13' for connecting a battery pack and connected to the body portion 12'. The battery pack is detachably connected to the mounting portion 13' along the axial direction. In the axial direction, the connecting portion 11', the body portion 12', and the mounting portion 13' are arranged sequentially. The housing 10' includes a handle portion 14' with one end connected to the top of the body portion 12' and the other end connected to the top of the mounting portion 13'. The handle portion 14' extends upward and is spaced apart from the body portion 12' and the mounting portion 13' to form a gripping space for the user to hold.

[0055] The duct assembly includes a blower duct that is detachably connected to the connector 11' (see reference). Figure 1 The air inlet duct 32' and the air guide shroud 33' located axially rearward of the air inlet duct 32' are at least partially housed within the housing 10'. The air inlet duct 32' and the air guide shroud 33' together form an internal airflow channel. The air inlet duct 32' includes a housing 321' fixed to the interior of the housing 10', and the power assembly 20' is at least partially housed within the housing 321'. The power assembly 20' includes a motor 21' with a drive shaft 211' and a fan 22' driven to rotate by the motor 21'. The rotation of the fan 22' generates airflow through the channel of the air duct assembly.

[0056] The main body 12' has an air inlet 121' that communicates with the outside fluid at its axial rear end, and the air blowing pipe includes an air outlet located at its axial front end (see reference). Figure 1 When the blower 100 is running, the drive shaft 211' rotates, driving the fan 22' to rotate and generating negative pressure in the channel. Under the action of air pressure, outside air enters from the air inlet 121' into the guide shroud 33' and then into the channel of the air inlet pipe 32'. After being accelerated by the rotation of the fan 22', it is blown out from the air outlet. In the axial direction, the blower pipe, air inlet pipe 32', guide shroud 33' and mounting part 13' are basically aligned, so that the airflow does not change its flow direction after entering the housing 10'. Furthermore, the airflow flows through the battery pack at least partially before entering the housing 10' to cool the battery pack.

[0057] The air deflector 33' is located axially between the air inlet duct 32' and the air inlet 121'. The air deflector 33' includes an axial opening 331' located at the rear end of the axial direction, an axial outlet 332' located at the front end of the axial direction and opposite to the axial opening 331', and a cover portion 333' connecting the axial opening 331' and the axial outlet 332'. The axial opening 331' corresponds to the air inlet 121', and the axial outlet 332' corresponds to the air outlet. In this embodiment, the cover portion 333' has a generally closed structure in the circumferential direction perpendicular to the axial direction.

[0058] The projections of the air guide 32' and the handle 14' in the vertical direction at least partially overlap, and the projections of the air guide 32' and the mounting part 13' in the axial direction at least partially overlap, so that when the user holds the handle 14' to operate the hair dryer, the airflow does not change its flow direction inside the air duct assembly, thereby avoiding losses and improving air intake efficiency.

[0059] The rear end of the air inlet duct 32' is provided with a guide portion 323', which is configured as a conical ring. That is, in the axial direction, the diameter of the guide portion 323' gradually decreases from rear to front, so that the airflow of the main body 12' can be effectively guided into the air inlet duct 32' before passing the power assembly 20'. Several hooks 324' extend at intervals from the axial rear end of the guide portion 323', and each hook 324' continues to extend rearward from the rear end of the guide portion 323'. The hook 324' includes a base 325' extending rearward from the axial rear end of the guide portion 323', a hook portion 326' extending from the axial rear end of the base 325' toward the main body 12', and a reinforcing portion 327' extending from the base 325' toward the inside of the guide portion 323'.

[0060] The air deflector 33' includes a positioning portion 334' located at its axial front end. The positioning portion 334' is configured as a rib extending from the outer peripheral wall of the cover portion 333' toward the body portion 12'. The body portion 12' has a fixing portion 17' that cooperates with the positioning portion 334' to fix the air deflector 33'. The fixing portion 17' includes an annular groove 171' that receives the rib. The rib includes a plurality of slots 335' spaced apart in the circumferential direction. Hooks 326' engage with the slots 335' to fix the air deflector 33' to the air inlet pipe 32'.

[0061] In the radial direction perpendicular to the axial direction, the hook portion 326' and the reinforcing portion 327' are located on opposite sides of the base portion 325'; in the axial direction, the hook portion 326' and the reinforcing portion 327' are located at the front and rear ends of the base portion 325', thereby increasing the strength of the hook 324' and avoiding the risk of breakage when the hook 324' is engaged with the slot 335'. ​​The positioning portion 334' has several spaced recesses 336' within its circumference to enhance the strength of the fit between the guide shroud 33' and the main body portion 12' and the air inlet pipe 32'.

[0062] In this embodiment, the air guide 33' and the air inlet pipe 32' are fixed by the engagement of the hook 324' and the slot 335'. ​​In other embodiments, the air guide 33' and the air inlet pipe 32' can also be fixed by the shape matching of the protrusion and the groove or by the rotational engagement between the protrusion and the guide groove, as long as the positioning between the air inlet pipe 32' and the air guide 33' can be achieved. This will not be elaborated on in detail here.

[0063] The main body 12' includes a receiving wall 122' located at the axial rear end, and a mounting part 13' extends rearward from the receiving wall 122'. The receiving wall 122' includes a first side wall 127' and a second side wall 128' located on both sides of the mounting part 13' in a vertical direction perpendicular to the axial direction, and a third side wall 129' inclinedly connected to the bottom of the second side wall 128'. Each of the first side wall 127', the second side wall 128', and the third side wall 129' is provided with an air inlet 121'. The first side wall 127' and the third side wall 129' are respectively inclined to the second side wall 128' so that the airflow entering the main body 12' has three different flow directions.

[0064] Please refer to Figure 7 and Figure 8 As shown, the air deflector 33' has a first inclined guide portion 337' corresponding to the first sidewall 127' and a second inclined guide portion 338' corresponding to the third sidewall 129'. In the horizontal direction, the first inclined guide portion 337' has a larger horizontal dimension than the first sidewall 127', and its protrusions on both sides correspond to the air inlets 121' on both sides of the first sidewall 127'. The second inclined guide portion 338' has a larger horizontal dimension than the third sidewall 129', and its protrusions on both sides correspond to the air inlets 121' on both sides of the third sidewall 129'. An axial opening 331' corresponds to the air inlets 121' on both sides of the second sidewall 128'. In the vertical direction, the axial opening 331' is located between the first inclined guide portion 337' and the second inclined guide portion 338'.

[0065] A gap is provided between the first inclined guide portion 337' and the first sidewall 127'. Airflow entering from the air inlets 121' on both sides of the first sidewall 127' enters the gap and, guided by the first inclined guide portion 337', enters the shroud 33' through the axial opening 331'. A gap is provided between the second inclined guide portion 338' and the third sidewall 129'. Airflow entering from the air inlets 121' on both sides of the third sidewall 129' enters the gap and, guided by the first inclined guide portion 337', enters the shroud 33' through the axial opening 331'. Guided by the inclined guide portion 338', the airflow enters the shroud 33' through the axial opening 331'; a gap is also provided between the shroud portion 333' and the main body portion 12'. In order to increase the air intake area, an air intake hole is provided at the bottom of the main body portion 12'. After the airflow enters through the air intake hole, it flows backward under the guidance of the outer wall of the shroud portion 333' and enters the axial opening 331' under the guidance of the second inclined guide portion 338', thereby merging with the airflow entering through the air inlet 121'.

[0066] The axial extension length of the first inclined guide portion 337' is less than the axial extension length of the first sidewall 127', and the axial extension length of the second inclined guide portion 338' is less than the axial extension length of the third sidewall 129', so that the axial rear ends of the first inclined guide portion 337' and the second inclined guide portion 338' are provided with windows, and the airflow entering from the first sidewall 127' and the third sidewall 129' enters the interior of the flow guide shroud 33' through the windows.

[0067] The first inclined guide portion 337' is configured as a cross-section extending rearward and downward from the top of the cover portion 333', and the second inclined guide portion 338' is configured as a cross-section extending rearward and upward from the bottom of the cover portion 333'. The first inclined guide portion 337' is arranged parallel to the first side wall 127', and the second inclined guide portion 338' is arranged parallel to the third side wall 129'. This arrangement can avoid collision losses when airflows from various directions converge, thus avoiding affecting air intake efficiency.

[0068] The inner wall of the cover 333' is set as a smooth curved surface. The air guide 33' is located between the air inlet 121' and the air inlet pipe 32' in the axial direction. After the airflow enters the air inlet 121', there is a buffer area of ​​a certain length, so that the airflow when passing through the fan 22' tends to be axial airflow, avoiding impact with the fan 22' to form vortices and increase noise or increase airflow loss.

[0069] In addition, to reduce noise, a noise reduction zone can be set inside the cover part 333'. A ring of noise reduction sponge can be fixed on the inner wall of the cover part 333' or multiple sound-absorbing air holes can be set directly on the inner wall of the cover part 333'. This will not be elaborated on here.

[0070] The other structures are the same as in the first embodiment, and will not be described in detail here.

[0071] This invention addresses this issue by positioning the air inlet 121' between the air inlet pipe 32' and the mounting portion 13' along their axial direction, and by providing a flow guide 33' within the main body portion 12' between the air inlet pipe 32' and the air inlet 121'. This allows the airflow to flow primarily along the axial direction, thereby avoiding losses and improving air intake efficiency. Furthermore, if the flow guide 33' is not installed inside the main body portion 12', the presence of multiple uneven structures inside the main body portion 12' would obstruct some airflow after it enters, causing airflow loss and generating significant noise. However, this invention addresses this by providing a flow guide 33' within the main body portion 12', with the inner wall of the flow guide 33' being a smooth curved surface, effectively avoiding airflow loss and reducing noise generation.

[0072] This invention is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions to the hair dryer of this invention can be found without departing from the principles and scope of the invention. The scope of protection of this invention is defined by the claims.

Claims

1. A hair dryer comprising an axially extending housing, a battery pack detachably connected to the housing, a power assembly at least partially housed in the housing, and a hose assembly connected to the housing, the housing comprising a connection portion at an axially forward end and connected to the hose assembly, a mounting portion at an axially rearward end and connected to the battery pack, and a body portion between the connection portion and the mounting portion, the power assembly comprising a motor at least partially located in the body portion and a fan rotated by the motor, the rotation of the fan creating an airflow through an interior of the hose assembly; characterized in that: The main body has an air inlet located at the rear end of the axial direction and a receiving wall connected to the mounting part. The mounting part extends generally along the axial direction, and the battery pack is slidably connected to the mounting part in the axial direction. The air inlet is located on opposite sides of the receiving wall in the transverse direction perpendicular to the axial direction. The housing includes a handle portion connecting the main body and the mounting part, and the battery pack is located below the handle portion. The receiving wall includes a first side wall facing the handle portion and a second side wall facing the battery pack. In the vertical direction perpendicular to the axial and transverse directions, the first side wall and the second side wall are located on opposite sides of the mounting part, respectively.

2. The hair dryer according to claim 1, characterized in that: The airflow enters the housing through the air inlet, and in the direction of airflow, the battery pack is at least partially exposed to the airflow upstream of the air inlet.

3. The hair dryer according to claim 1, characterized in that: The air inlet is approximately parallel to or aligned with the receiving wall in the axial direction.

4. The hair dryer according to claim 3, characterized in that: The receiving wall is generally closed in the axial direction.

5. The hair dryer according to claim 4, characterized in that: The air inlet includes a first air inlet area located on both sides of the first sidewall and a second air inlet area located on both sides of the second sidewall. The angle between the flow direction of the airflow entering from the first air inlet area and the flow direction of the airflow entering from the second air inlet area is less than or equal to 90°.

6. The hair dryer according to claim 5, characterized in that: The receiving wall includes a third sidewall connected to the second sidewall. The first sidewall and the third sidewall are located on both sides of the second sidewall in the vertical direction. The air inlet includes a third air inlet area located on both sides of the third sidewall in the lateral direction. The angle formed between the flow direction of the airflow entering from the third air inlet area and the flow direction of the airflow entering from the second air inlet area is less than or equal to 90°.

7. The hair dryer according to claim 1, characterized in that: The blower includes several guide sections spaced apart at the air inlet. The air inlet includes at least two air inlet areas that open in different directions. The angle formed between the extending directions of the guide sections of two adjacent air inlet areas is less than or equal to 90°. The guide sections and the main body are integral components.

8. The hair dryer according to claim 1, characterized in that: The main body is generally closed in the circumferential direction perpendicular to the axial direction.

9. A hair dryer, comprising an axially extending housing, a battery pack detachably connected to the housing, a power assembly at least partially housed within the housing, and a duct assembly connected to the housing, the housing including a connecting portion connected to the duct assembly, a body portion connected to an axially rearward side of the connecting portion, and a mounting portion for connecting the battery pack and connecting to the body portion, the power assembly including a motor at least partially located within the body portion and a fan driven to rotate by the motor, the fan generating airflow through the interior of the duct assembly; characterized in that: The main body is provided with an air inlet located at the rear end of the axial direction, a receiving wall connected to the mounting part, and an extension wall connecting the connecting part and the air inlet. In the transverse direction perpendicular to the axial direction, the size of the extension wall is larger than the size of the receiving wall. The air inlet is located on opposite sides of the mounting part in the transverse direction perpendicular to the axial direction. The receiving wall includes a first side wall and a second side wall located on opposite sides of the mounting part.

10. The hair dryer according to claim 9, characterized in that: The total circumference of the air inlet in the circumferential direction perpendicular to the axial direction is greater than or equal to 90°.

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