CN211633559U - Depilatory instrument - Google Patents

Abstract

The application discloses a depilating instrument, which comprises a shell, a depilating assembly and a refrigerating piece, wherein the depilating assembly and the refrigerating piece are positioned in the shell; the refrigeration piece has the cold junction, the cold junction subsides of refrigeration piece are located on the leaded light spare, with will the lower temperature of cold junction passes through in proper order the leaded light spare with the window that moults transmits to the outside of casing. The application provides an appearance that moults locates the leaded light piece through pasting the cold junction with the refrigeration piece on for the lower temperature of cold junction can transmit to the appearance outside that moults through leaded light piece, thereby when making this subassembly that moults to moult, can reduce the temperature at the position that moults, reduces because the too high painful sense that leads to of temperature.

Description

Depilatory instrument

Technical Field

The application relates to the field of medical beauty instruments, in particular to a depilating instrument.

Background

With the increase of attention of people to the appearance image, the medical beauty industry is rapidly developed, and the image of people can be seriously influenced by too long or too dense hair. The existing medical beautifying hair removal technology is to remove hairs through a special hair removal instrument, so that the skin is clean and beautiful.

Currently, the existing depilatory apparatus on the market absorbs the light of a specific wave band by using the melanocyte in the hair follicle, so that the hair follicle generates heat, and the melanocyte is decomposed, thereby preventing the hair from regenerating. Since intense pulsed light is released, the temperature of the depilated area is too high during depilation, causing pain to the patient, and the energy is generally reduced to reduce the pain, and the depilation efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a depilating instrument.

The embodiment of the application provides a depilatory instrument, which comprises a shell, a depilatory assembly and a refrigerating piece, wherein the depilatory assembly and the refrigerating piece are positioned in the shell; the refrigeration piece has the cold junction, the cold junction subsides of refrigeration piece are located on the leaded light spare, with will the lower temperature of cold junction passes through in proper order the leaded light spare with the window that moults transmits to the outside of casing.

The light guide part is provided with a first end face and a peripheral side face which are adjacent, the first end face is aligned to and close to the depilation window of the shell, and the cold end of the refrigeration part is attached to the peripheral side face, so that cold air generated by the cold end is transmitted to the first end face through the peripheral side face.

The hair removal instrument further comprises a heat dissipation device, wherein the heat dissipation device is attached to the hot end of the refrigerating piece so as to transfer heat generated by the hot end of the refrigerating piece to a position far away from the cold end.

The depilating instrument further comprises a support, the support is fixedly connected with the heat dissipation device and forms an accommodating space, and the light guide piece and the refrigerating piece are located in the accommodating space.

The refrigeration piece is clamped between the light guide piece and the heat dissipation device.

Wherein, the refrigeration piece includes at least one piece refrigeration piece.

The light guide part is at least partially positioned outside the hair removal window of the shell, and the end face of the light guide part positioned outside the shell can contact with a hair removal part.

The depilating instrument is further provided with a sensing piece and a controller, the sensing piece is arranged in the shell, when the sensing piece receives a sensing signal, the sensing piece sends the sensing signal to the controller, and the controller controls the depilating assembly to flash according to the sensing signal.

Wherein the sensing piece is arranged around the light guide member.

The depilating instrument further comprises a fan, a ventilation hole is formed in the shell, air flow outside the shell enters the inside of the shell through the ventilation hole, and the inside of the shell is cooled under the effect of the fan.

The appearance that moults that this application embodiment provided locates on the leaded light spare through the cold junction subsides with refrigeration piece, with will the lower temperature of cold junction passes through in proper order leaded light spare with the window that moults transmits to the outside. Therefore, when the depilating device is used for depilating, the temperature of the depilating part can be reduced, and pain caused by too high temperature can be reduced.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments will be briefly described below, and obviously, the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of an epilating apparatus according to an embodiment of the present application;

fig. 2 is an enlarged view of a portion of the hair removal window of the housing of the hair removal device of fig. 1;

FIG. 3 is an enlarged view of a portion of the hair removal window and light guide of the hair removal device of FIG. 2;

FIG. 4 is a schematic view of an epilating apparatus in an epilating state according to an embodiment of the application;

FIG. 5 is a schematic view of the epilating assembly of the epilating apparatus in FIG. 1;

FIG. 6 is a schematic view of the epilator cooling member and the light guide of FIG. 1;

FIG. 7 is a schematic view of the epilating assembly, the cooling member and the heat dissipation device of the epilating apparatus of FIG. 1;

FIG. 8 is a schematic view of the sensor strip and light guide of the epilating apparatus of FIG. 1;

figure 9 is a schematic view of the fan and vent of the epilator shown in figure 1.

Detailed Description

The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, a hair removal device 100 provided in the present embodiment of the present application includes a housing 10, a hair removal assembly 20 located in the housing 10, and a cooling member 30, wherein the housing 10 has a hair removal window 1211, the hair removal assembly 20 has a light guide 201, and the light guide 201 is disposed close to and aligned with the hair removal window 1211 of the housing 10; the refrigeration piece 30 is provided with a cold end 301, and the cold end 301 of the refrigeration piece 30 is attached to the light guide piece 201 so as to reduce the temperature of the light guide piece 201.

Locate on light guide 201 through the cold junction 301 subsides with refrigeration piece 30 for cold junction 301 conducts to keeping away from with the partial heat on the light guide 201 the position of light guide 201, thereby reduce the temperature of light guide 201, carry out the cold compress to the position that moults through light guide 201 when mouling, reduce the temperature at the position that moults, pain when reducing to moult feels.

Optionally, the housing 10 has an inner cavity for receiving the hair removal assembly 20 and a hair removal window 1211 communicating with the inner cavity. The hair removal window 1211 refers to a portion which comes into direct or indirect contact with a hair removal area when hair is removed.

In this embodiment, the housing 10 includes an upper housing 11 and a lower housing 12, and the upper housing 11 is a spatial curved plate structure. The lower case 12 includes a lower surface 121 and a side surface 122 disposed around the lower surface 121, and the side surface of the lower case 12 is engaged with the upper case 11 to form an inner cavity. The lower surface 121 is the surface close to the epilation site during epilation, and the lower surface 121 is provided with an epilation window 1211.

Optionally, the hair removal assembly 20 has a light guide 201, the light guide 201 is used for transmitting light to the hair removal area during hair removal, and the light guide 201 is close to the lower surface 121 of the lower housing 12 and is partially or completely aligned with the hair removal window 1211.

In one embodiment, as shown in FIG. 2, the light guide 201 is sapphire, which is slightly smaller than the opening size of the hair removal window 1211, and the sapphire is aligned with the hair removal window 1211. The sapphire aligned with the hair removal window 1211 transmits light to the hair removal site. In other embodiments, the light guide 201 may be other light guides such as quartz, K9 crystal, and the like.

Optionally, referring to fig. 1 and fig. 3, the light guide 201 is at least partially located outside the hair removal window 1211 of the housing 10, and an end surface of the light guide 201 located outside the housing 10 can contact a hair removal portion.

In this embodiment, referring to fig. 1 and fig. 3, the light guide 201 is partially located outside the hair removal window 1211 of the housing 10, and partially located in the inner cavity of the housing 10, the portion located in the inner cavity of the housing 10 is used for receiving light, and the portion located outside the hair removal window 1211 contacts with a hair removal area during hair removal, and transmits the light to hair follicle tissue. Of course, in other embodiments, the light guide 201 is entirely located in the inner cavity of the housing 10, the hair removal window 1211 is in contact with the hair removal area, and the surface of the light guide 201 near the hair removal window 1211 emits the received light, which passes through the skin after passing through the hair removal window 1211 to reach the hair follicle tissue to destroy the melanocytes in the hair follicle.

As shown in fig. 4, the working scenario of the epilating apparatus 100 according to the embodiment of the present application may specifically be as follows: when the hair is removed, the hair removal device 100 is gradually close to the arm, when the light guide 201 located outside the housing 10 contacts the hair removal part, the hair removal device 100 is automatically driven to emit light or driven by a flash button, after part of the light guide 201 located in the inner cavity of the housing 10 receives light, the light is emitted out through the surface of the light guide 201 located outside the housing 10, and the emitted light passes through the skin and reaches hair follicle tissues to destroy melanocytes in the hair follicles.

Optionally, as shown in fig. 5, the hair removal assembly 20 further includes a light emitting member 202, a light reflecting member 203 and a filter plate 204, the light emitting member 202 is located above the light guide member 201, and the light emitting member 202 is configured to emit light to the light guide member 201. In one embodiment, the light emitting member 202 is a xenon lamp, which is substantially a long tube type, and the xenon lamp emits light by discharge of xenon gas, and the long tube of the xenon lamp is filled with an inert gas xenon gas. The xenon lamp is sealed with a pair of electrodes, and the electrodes comprise an anode and a cathode which are positioned at two ends of a circular tube filled with xenon. When the power is switched on, a trigger in the circuit generates a high-frequency high-voltage signal to be applied to two ends of the xenon lamp, so that xenon in the lamp tube is excited and ionized to generate arc discharge, and the arc discharge radiates out of a light source.

The light reflecting member 203 is used for reflecting the light emitted by the light emitting member 202, and the reflecting surface of the light reflecting member 203 is arranged opposite to the light guiding member 201, so that the light source reflected by the light reflecting member 203 can be received by the light guiding member 201. In one embodiment, the reflective member 203 is a semi-arc structure, and the reflective member 203 is located above the light emitting member 202 and is used for blocking light rays above the circular tube shaped light emitting member 202, so that light rays emitted from the upper end of the circular tube shaped light emitting member 202 are reflected by the reflective member 203 and enter the light guide member.

The filter plate 204 is used to select the wavelength of the light source emitted by the xenon lamp, and only allows light of a specific wavelength to pass through. Optionally, a filter plate 204 is located between the light guide and the light emitting member 202. Specifically, the filter plate 204 has the incident end and the transmission end that set up back to back, the incident end of filter plate 204 is aimed at the light-emitting member 202, the transmission end of filter plate 204 is aimed at the leaded light spare, the incident end of filter plate 204 receives the light that the light-emitting member 202 sent and the light that reflector 203 reflects, the light of the specific wavelength that will see through filter plate 204 is penetrated into leaded light spare 201 to the transmission end of filter plate 204.

Alternatively, as shown in fig. 6, the cooling member 30 may comprise at least one cooling plate. Specifically, the refrigerating sheet is also called a thermoelectric semiconductor refrigerating assembly, a peltier device, and the like, and refers to a patch which has two surfaces, one surface absorbs heat and the other surface dissipates heat, plays a role in heat conduction, and cannot generate cold. The refrigerating member 30 is provided with a cold end 301 and a hot end 302 which are arranged oppositely, and the cold end 301 of the refrigerating member 30 is attached to the light guide member 201 so as to reduce the temperature of the light guide member 201. Through locating cold junction 301 subsides on leaded light 201, cold junction 301 absorbs leaded light 201 surface heat rather than the contact, and conduct the heat to hot junction 302, the heat on the leaded light 201 constantly gives off to the position with cold junction 301 contact, and constantly be conducted to the hot junction 302 of keeping away from leaded light 201 by cold junction 301, thereby make the temperature on the leaded light 201 reduce, when mouling, the lower leaded light 201 of temperature directly carries out cold compress or gives off air conditioning to the position of mouling.

In this embodiment, the refrigerating element 30 is a single refrigerating sheet, and the cold end 301 of the refrigerating sheet absorbs heat. The cold end 301 of the refrigeration sheet is attached to the light guide 201. When unhairing, the temperature increase on the light guide 201, cold junction 301 absorb rather than the heat on the light guide 201 of contact, keep away from the heat on the light guide 201 of cold junction 301 simultaneously and constantly be diffused to the light guide 201 position with cold junction 301 contact, the heat on the whole light guide 201 reduces, and the position temperature that moults with the light guide 201 contact reduces.

As shown in fig. 6, the light guide 201 has a first end face 2011 and an adjacent peripheral side face 2012, and the cold end 301 of the refrigeration member 30 is attached to the peripheral side face 2012, so that the cold air generated by the cold end 301 is transmitted to the first end face 2011 through the peripheral side face 2012.

Through pasting cold junction 301 with refrigeration piece 30 on locating the week side 2012 of leaded light 201, the temperature on the first terminal surface 2011 can directly be followed first terminal surface 2011 and is gived off to week side 2012, and cold junction 301 absorbs the heat of week side 2012 and conducts the heat to the hot junction 302 of keeping away from leaded light 201 for thermal conduction path shortens, can reduce the temperature on the leaded light 201 fast.

Optionally, the light guide 201 is of a cubic structure, and the light guide 201 has a peripheral side 2012 adjacent to the first end surface, the peripheral side including a first side 2013 corresponding to a long side of the light guide 201 and a second side 2014 corresponding to a short side of the light guide 201.

In this embodiment, referring to fig. 1 and fig. 6, the light guide 201 is a cube, and the cold end 301 of the refrigeration member 30 is attached to the second side 2014 of the light guide 201. By attaching the cold end 301 of the cooling member 30 to the second side 2014, the hot end 302 of the cooling member 30 can be away from the center of the hair removal window 1211, so as to prevent the heat of the hot end 302 of the cooling member 30 from being dissipated to the hair removal window 1211 and being transmitted to the hair removal part through the hair removal window 1211.

As shown in fig. 7, the epilating apparatus 100 further comprises a heat dissipating device 40, wherein the heat dissipating device 40 is attached to the hot end 302 of the cooling member 30. By arranging the heat dissipation device 40 inside the hair removal device 100 and arranging the heat dissipation device 40 at the hot end 302 of the cooling member 30, the heat dissipation device 40 can transfer the heat of the hot end 302 of the cooling member 30 to a position far away from the cold end 301, so that the hair removal device 100 can still have a good cooling effect when being used for a long time.

Alternatively, as shown in fig. 7, the heat dissipation device 40 refers to a device or an apparatus that transfers heat generated by a machine or other equipment during operation in time to avoid affecting the normal operation of the machine or other equipment. Common radiators can be divided into various types such as air cooling, heat pipe radiators, liquid cooling, semiconductor refrigeration, compressor refrigeration and the like according to the heat dissipation mode. Specifically, the heat dissipation device 40 includes a conductive part 41 and a heat dissipation part 42, where the conductive part 41 is in contact with the hot end 302 of the cooling member 30 and is used for conducting heat of the hot end 302 to the heat dissipation part 42. The heat dissipation portion 42 includes a plurality of heat dissipation fins 421, and the heat dissipation fins 421 dissipate heat transferred by the conduction portion 41.

In one embodiment, as shown in fig. 7, the epilating apparatus 100 further includes a bracket 202, the bracket 202 is fixedly connected to the heat dissipation device 40 and forms an accommodating space, and the light guide 201 and the cooling member 30 are located in the accommodating space. As can be appreciated, the refrigeration member 30 is sandwiched between the light guide member 201 and the heat dissipation device 40. Specifically, the bracket 202 is a half-ring bracket, three sides of the bracket 202 surround the peripheral side of the light guide 201, and the open end of the bracket 202 is provided with a connecting block 2021 connected to the heat dissipation device 40. The refrigerating element 30 is disposed inside the connecting seat 2021, and the connecting seat 2021 is used to fixedly connect the bracket 202 and the heat dissipation device 40. The connection between the bracket 202 and the heat dissipation device 40 may be any one of threaded connection, joggle connection, welding, bonding, and locking connection.

Optionally, the bracket 202 is connected to the heat sink 40 through a screw, and a through hole is formed in the connecting seat 2021 of the bracket 202, and a screw passes through the through hole to be matched with the screw on the heat sink 40. The heat sink 40 is provided with a through hole through which a screw passes to be matched with the thread on the connecting seat 2021. Through holes are formed in the support 202 and the heat dissipation device 40, and screws sequentially pass through the through holes in the support 202 and the through holes in the heat dissipation device 40 and are locked on one side through nuts.

Further, referring to fig. 1 and 8, the depilating apparatus 100 further includes a sensing piece 205 and a controller, the sensing piece 205 is disposed inside the housing 10, when the sensing piece 205 receives a sensing signal, the sensing piece 205 sends a sensing signal to the controller, and the controller controls the depilating assembly 20 to emit light according to the sensing signal.

By arranging the sensing piece 205, the depilating apparatus 100 can send a sensing signal to drive the depilating apparatus 100 to work when receiving the sensing signal; when the housing 10 is close to the epilating portion, the sensing piece 205 receives a sensing signal from the outside of the housing 10 and sends the sensing signal to the controller, and the controller controls the epilating assembly 20 to emit light to enter the epilating state. The provision of the sensor blade 205 eliminates the need for complex circuitry inside the housing 10 and for keys on the housing 10 to control the epilating apparatus 100.

In particular, the sensing strip 205 is a capacitive sensing strip comprising a pair of adjacent electrodes, and when a conductor approaches the electrodes, the capacitance between the two electrodes increases, and the controller detects the change in capacitance, thereby controlling the epilating apparatus 100 to enter the operating state.

In one embodiment, as shown in fig. 8, the sensing piece 205 is disposed around the light guide 201, the sensing piece 205 forms a ring around the light guide 201, and the sensing piece is close to the first end 2011 of the light guide 201.

When the hair removal device 100 is close to a hair removal area, the light guide 201 contacts the skin of a human body, the hair removal window 1211 on the housing 10 is close to the hair removal area, the sensing piece 205 arranged around the light guide 201 senses the capacitance of the human body, the capacitance between the electrodes on the sensing piece 205 is increased, the sensing piece 205 sends a sensing signal to the controller, the controller detects the change of the capacitance, the hair removal assembly 20 is driven to emit light automatically or by a key, and the light is transmitted to the hair removal area through the light guide 201, passes through the skin of the hair removal area, and reaches the hair follicle tissue.

Further, referring to fig. 1 and 9, the depilating apparatus 100 further includes a fan, a ventilation hole is formed in the housing 10, and the air flow outside the housing 10 enters the housing through the ventilation hole, so as to cool the housing under the action of the fan.

By providing a fan inside the housing, opposing air flows are formed around the periphery of the epilation assembly 20, which accelerates the heat dissipation inside the housing 10.

In an embodiment, referring to fig. 1 and fig. 9, the ventilation holes include an air inlet 1212 and an air outlet 1213, the air inlet 1212 and the air outlet 1213 are located at two sides of the housing 10, and the air inlet 1212 and the air outlet 1213 include a plurality of through holes adjacently disposed, and the cross-sectional shapes of the through holes may be any one or more of circular, semicircular, square, and oval. No barrier is disposed between the air inlet 1212 and the fan. The air inlet 1212 and the air outlet 1213 include a plurality of through holes, the cross-sectional shapes of the through holes are substantially circular, and the size of the through hole at the center of the side surface of the housing 10 is larger than the size of the through hole at the edge of the side surface of the housing 10. The fan comprises a first fan 431 and a second fan 432, the air inlet 1212 is opposite to the first fan 431, and no barrier is arranged between the air inlet 1213 and the first fan 432. The second fan 432 is fixed on the heat dissipating device 40 and close to the heat sink 402, the heat sink 402 is close to the air outlet 1213, the second fan 432 accelerates the flow of air around the heat sink 402, and the fast flowing air carries the heat on the heat sink 402 to the outside of the housing 10 through the air outlet 1213. Of course, in other embodiments, the fan may be an extraction fan.

The appearance that moults that this application embodiment provided need when mouling, makes the appearance 100 that moults be close to the position of mouling, and light guide 201 contacts the position of mouling, encircles the response piece 205 that light guide 201 set up and senses human electric capacity, and the electric capacity between the electrode increases on the response piece 205, and response piece 205 sends sensing signal extremely the controller, the controller detect the change of electric capacity, and automatic or through button drive subassembly 20 that moults is luminous, and light passes through light guide 201 and spreads to the position of mouling, passes the skin at the position of mouling, reachs the hair follicle tissue, destroys the melanocyte in the hair follicle, realizes mouling. In the process, the cold end 301 of the refrigerating member absorbs the heat on the surface of the light guide member 201 contacted with the cold end 301, so that the temperature on the light guide member 201 is reduced, when in depilation, the light guide member 201 with lower temperature directly performs cold compress on the depilation position or emits cold air to the depilation position, and the heat on the hot end 302 of the refrigerating member is transferred to the outside through the heat dissipation device and the fan.

In the hair removal device 100 of the present embodiment, the light guide 201 of the hair removal assembly 20 is disposed close to and aligned with the hair removal window 1211 by forming the hair removal window 1211 in the housing 10 of the hair removal device 100. Will refrigerate 30 subsides locate on leaded light 201, refrigerate 30 cold junction 301 and absorb the partial heat on leaded light 201 to reduce the temperature of leaded light 201, carry out the cold compress to the position that moults through leaded light 201 when mouling, reduce the temperature at the position that moults, pain when reducing to moult feels.

The features mentioned above in the description, the claims and the drawings can be combined with one another in any desired manner, insofar as they are of significance within the scope of the invention. The advantages and features described for the cooling element apply in a corresponding manner to the depilation device.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (10)

1. A hair removal apparatus comprising a housing, a hair removal assembly and a cooling member, the hair removal assembly and the cooling member being positioned within the housing, the housing having a hair removal window, the hair removal assembly having a light guide disposed proximate to and aligned with the hair removal window of the housing; the refrigeration piece has the cold junction, the cold junction subsides of refrigeration piece are located on the leaded light spare, with will the lower temperature of cold junction passes through in proper order the leaded light spare with the window that moults transmits to the outside of casing.

2. A depilatory apparatus as claimed in claim 1, wherein said light guide has a first end face and a peripheral side face which are adjacent, said first end face being aligned with and adjacent to the depilatory window of the housing, and wherein the cold end of said cooling member is attached to said peripheral side face such that cold air generated at said cold end is transmitted to said first end face via said peripheral side face.

3. An epilating apparatus as claimed in claim 2, wherein the cooling member further comprises a hot end disposed opposite the cold end, the epilating apparatus further comprising a heat sink attached to the hot end of the cooling member for transferring heat generated at the hot end of the cooling member to a location remote from the cold end.

4. An epilator as claimed in claim 3, wherein the epilator further comprises a holder fixedly connected to the heat sink and forming an accommodation space in which the light guide and the cooling member are located.

5. An epilator as claimed in claim 4, wherein the cooling member is sandwiched between the light guide and the heat sink.

6. An epilating apparatus as claimed in any one of claims 1 to 5, wherein the cooling member comprises at least one cooling plate.

7. A depilation instrument as claimed in any one of claims 1 to 5, characterized in that the light guide is located at least partly outside the depilation window of the housing, an end face of the light guide located outside the housing being able to contact a depilation site.

8. An epilating apparatus as claimed in claim 7, further comprising a sensor strip and a controller, wherein the sensor strip is disposed inside the housing, and when the sensor strip receives a sensing signal, the sensor strip sends a sensing signal to the controller, and the controller controls the epilating assembly to flash according to the sensing signal.

9. An epilator as claimed in claim 8, wherein the sensor strip is arranged around the light guide.

10. An epilating apparatus as claimed in any one of claims 1 to 5, characterized in that the epilating apparatus further comprises a fan, the housing is provided with a vent hole, air outside the housing enters the interior of the housing through the vent hole, and the interior of the housing is cooled by the fan.

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