HAIR REMOVAL INSTRUMENT AND SEMICONDUCTOR REFRIGERATION SLICE

The present invention relates to a hair removal device and a Peltier cooler. The hair removal device comprises a hair removal head, a light source assembly, a power supply unit, and a control circuit board; the power supply unit supplies power to the light source assembly, and the control circuit board controls the light source assembly to generate pulsed light; a transparent medium body is mounted on the hair removal work head to serve as a hair removal work surface coming into contact with skin so as to form a transparent medium hair removal work surface. The Peltier cooler comprises a semiconductor pillar layer, and a hot surface and a cold surface at two ends of the semiconductor galvanic couple layers; the cold surface is a transparent crystal so as to form a transparent crystal cold surface.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to Peltier cooler technology, especially relates to a hair removal device and Peltier cooler.

Description of Related Art

The head of the present hair removal device on the market cannot provide an ice cooling effect. The light source and heatsink in the hair removal device dissipate heat though air entering the air inlet provided on the front of the light source and heatsink; where heat dissipation is slow, the cooling effect is not good, the experience is not good, hair removal efficiency and hair removal effect are low; and there are water mist or water droplets in the device, which will damage the control board.

BRIEF SUMMARY OF THE INVENTION

The object of the present invention is to provide a hair removal device, which aims to

overcome that the head of the existing hair removal device cannot form an ice-cooling effect and the experience is not good.

Another object of the present invention is to provide a Peltier cooler.

To obtain the above object, the present invention provides:a hair removal device comprises a head for hair removal, a light source assembly, a power supply unit, and a control circuit board; wherein the power supply unit supplies power to the light source assembly, and the control circuit board controls the light source assembly to emit pulsed light; the head for hair removal is equipped with a transparent body to form a transparent working surface in contact with skin for hair removal; the pulse light emitted from the light source assembly is transmitted from the transparent body to perform hair removal; the transparent body is cooled by a heat dissipation assembly for a cooling effect to skin or pre-cooling skin to be depilated.

In some embodiments, the transparent working surface is located at a front end of the head, and forms a whole front-end surface in contact with skin for cooling; the transparent body is attached to a cooler, or the transparent body forms the cooler; the heat dissipation assembly is used for the cooler to dissipate heat.

In some embodiments, the cooler is a Peltier cooler; the Peltier cooler comprises a hot side and a cold side; the Peltier cooler uses the transparent body as the cold side to obtain a transparent cold side; or, the cold side of the Peltier cooler is attached to the transparent body and cooled the transparent body; the hot side of the Peltier cooler is connected to the heat dissipation assembly for heat dissipation; the hair removal device comprises a housing, and the light source assembly, the power supply unit, the control circuit board and the heat dissipation assembly are installed in the housing; the transparent body is installed in a head housing; the housing defines air inlets and air outlets; the heat dissipation assembly comprises a heatsink and a fan; the heatsink is arranged in an air path communicate the air inlets, the fan and the air outlets for heat dissipation.

In some embodiments, the Peltier cooler has a light-transmitting region, which is used for pulse light transmission for hair removal; the light-transmitting region is a hollow region in the Peltier cooler, and/or, the light-transmitting region is provided by the transparent body of the Peltier cooler; the Peltier cooler comprises a semiconductor pillar layer, and the hot side and the cold side are respectively fixed on opposite ends of the semiconductor pillar layer; the transparent body is fixedly installed in an annular edge of the head housing.

In some embodiments, the cold side and/or the hot side of the Peltier cooler is made of a ceramic material so as to form the ceramic cold side and/or the ceramic hot side; or, the cold side and/or hot side of the Peltier cooler are made from transparent materials to form a transparent cold side and/or a transparent hot side; the control circuit board controls the light source assembly to emit pulsed light which transmits through the light-transmitting region of the Peltier cooler, further transmits the transparent working surface for hair removal on the skin in contact with the working surface; the semiconductor pillar layer, the hot side and the cold side of the Peltier cooler together define the hollow region; the Peltier cooler is annular with a hollow region inside as the light-transmitting region; the Peltier cooler is fixed in the head housing, and is attached to a back of the transparent body.

In some embodiments, the heat dissipation assembly comprises a heat pipe, the heat pipe is connected with the hot side of the Peltier cooler and the heatsink, and is used to quickly transport heat from the hot side to the heatsink for heat dissipation; the heatsink is one or more of: plate fin heatsinks, plate fins or thermally conductive plates; wherein plate fins are set as one or more groups; the heat pipe is inserted in or fixed on a top of the plate fins or thermally conductive plates; refrigerant is filled inside the heat pipe; the heat pipe is in contact with the hot side or connect the hot side through a thermally conductive member; the thermally conductive member or a section of the heat pipe is configured corresponding to the hot side of the Peltier cooler, and is in contact with the hot side; the fan is installed inside or outside a cavity, and the cavity extends to form an air outlet channel, and an end of the air outlet channel is connected with the air outlet.

In some embodiments, the air inlet in the housing, air ducts of the light source assembly, the fan, and the air outlet are in air communication to form an air path for a light source assembly to dissipate heat; when the fan starts, cold air enters from the air inlet to take heat from the light source assembly, and is discharged by fan from the air outlet for cooling the light source assembly; a plurality of air inlets comprises a first air inlet in the housing corresponding to the heatsink, and second air inlets in the housing arranged corresponding to the light source assembly; the first air inlet is used for cold air entering into the air ducts of the heatsink; the second air inlet is used for cold air entering the air path for the light source assembly and is in air communication with the light source assembly; the light source assembly comprises a light source and a reflector outside the light source; an air guide cover is arranged outside the reflector, and a space between the air guide cover and the reflector is in air communication with the air path for the light source assembly; and the reflector is made of thermally conductive material.

In some embodiments, the light source assembly comprises a heat dissipation assembly; the heat dissipation assembly comprises a heat pipe, a heatsink, and a fan; the heat pipe is thermally connected between the light source assembly and the heatsink, and dissipates heat from the light source assembly to the heatsink; the heatsink for the light source assembly is arranged in an air path which is in air communication with the air inlet, the fan and the air outlet; and the light source heatsink is cooled through the air path; the light source assembly comprises a light source and a reflector outside the light source; heat from the light source is transferred to the reflector for heat dissipation; the light source assembly further comprises a thermally conductive cover; one side of the thermally conductive cover is attached to the reflector, and the other side is provided with a tubular slot; a section of the heat pipe is fitted in the tubular slot so as to transfer heat to the heat pipe; or, the reflector is provided with a tubular slot, and a section of the heat pipe is fitted in the tubular slot so as to transfer heat to the heat pipe.

In some embodiments, the cold side is a transparent crystal to form a transparent crystal cold side; the transparent crystal connects one or more sets of the semiconductor pillar layers each with one hot side connected thereto; the Peltier cooler has a light-transmitting region provided by the transparent crystal; the transparent crystal cold side is the transparent working surface.

Preferably, the transparent is a transparent crystal. In some embodiment, the cooler is annular, and a hollow region is defined inside as a light-transmitting region for pulsed light to be transmitted for hair removal.

Further, the cooler is an annular Peltier cooler; the semiconductor pillar layer is annular, and electronic components are arranged in an annular region; the hot side and the cold side are annular corresponding to the semiconductor pillar layer; and the hot side and the cold side are ceramic substrates and the hot side of the ceramic substrate.

In some embodiments, the head is equipped with at least two sensors for determining whether the working surface is completely or almost completely covered by skin so as to turn on/off the light source; the two sensors are installed at opposite corners along a diagonal line of the working surface.

The present invention also provides a Peltier cooler, which comprising a semiconductor pillar layer and a hot side and a cold side at opposite ends of the semiconductor pillar layer; wherein the cold side is a transparent crystal to form a transparent crystal cold side; the transparent crystal connects one or more sets of the semiconductor pillar layers each connecting one hot side; the Peltier cooler has a light-transmitting region; the light-transmitting region is provided by the transparent crystal; the Peltier cooler provides a cooling work surface for the hair removal device for a cooling effect to skin or pre-cooling skin to be depilated.

Further, the one or more sets of the semiconductor pillar layers each connected with one hot side are arranged on sides of the transparent crystal; the semiconductor pillar layer comprises a semiconductor pillars and metal conductors connected thereto; the hot side and the transparent crystal cold side of are fixedly connected to the metal conductors of the semiconductor pillar layer; the hot side and the transparent crystal cold side are soldered with the metal conductors.

Further, the semiconductor pillar layer is connected with positive and negative electrodes; the hot side and the transparent crystal cold side are connected to opposite ends of the semiconductor pillar layer respectively; the transparent crystal cold side covers an entire surface of the semiconductor pillar layer and provides a working surface; a thickness of the transparent crystal cold side is not less than1mm; the hot side of the Peltier cooler is composed of a ceramic substrate to form a ceramic hot side; the ceramic substrate and the metal conductors of the semiconductor pillar layer are fixedly connected; the semiconductor pillar layer is set between the hot side of the and the transparent crystal cold side.

Further, the one or more sets of semiconductor pillar layers each connecting one hot side are arranged on one side, opposite two sides or multiple sides of the transparent crystal; or, the semiconductor pillar layer is annular, and electronic components are arranged in an annular region; the hot side is annular, and is fixed with one side of the semiconductor pillar layer; the transparent crystal cold side is fixed with the other side of the semiconductor pillar layer; a hollow region of the semiconductor pillar layer, a hollow region of the hot side, and together with the transparent crystal region forms the light-transmitting region.

Further, the hot side of the Peltier cooler is connected to the heat dissipation assembly, so as to transferred heat from the hot side of the Peltier cooler to the heat dissipation assembly for heat dissipation.

Further, the heat dissipation assembly comprises a heat pipe and a heatsink connected to the heat pipe; the heat pipe is able to transfer heat from the hot side to the heatsink for heat dissipation; the heat pipe directly contacts the hot side or connects the hot side through a thermally conductive member; the heat pipe is installed on or inserted in the heatsink.

Further, one end of the thermally conductive member or the heat pipe is adapted for and contacts with the hot side of the Peltier cooler; the heat pipe forms a ring, and the thermally conductive member is fitted in the ring; there is a refrigerant inside the heat pipe; the heatsink is one or more of: a plate fin heatsink, plate fins, or thermally conductive plates.

The advantages of the present invention are:

The hair removal device of the present invention has a transparent crystal to cool the head surface, and provide an ice cooling effect for the user with a comfortable experience.

Further, the Peltier cooler of the present invention uses a transparent crystal as a cool side of to replace a ceramic plaque, and the transparent crystal is directly fixedly connected with p & n-type semiconductor pillars so that a new type of Peltier cooler is obtained. At the same time, the transparent crystal can directly contact with skin and form the head surface to remove hair. Use the transparent crystal directly as a cool side of the Peltier cooler and to form a depilation surface, which can obtain the following advantages:

1) cooling rate and efficiency are improved since a middle layer of traditional Peltier cooler is eliminated, and the loss of cooling rate is reduced;

2) the whole front surface of the transparent crystal is in contact with the skin or the contact surface, which increases the cooling area and provides a better experience; and

3) Using the transparent crystal as the cold side, the pulsed light irradiates the skin through the transparent crystal, and is cooled by the transparent crystal, thereby pain or discomfort caused by light is greatly reduced or eliminated.

The present invention will be described in further detail below in conjunction with accompanying drawing.

DETAILED DESCRIPTION OF THE INVENTION

It should be noted that, in the case of no conflict, each embodiment in the present invention and the features in the embodiments can be combined with each other, and the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

First Embodiment of the Hair Removal Device

Referring toFIGS.1-7, the present invention provides a hair removal device1000, which comprises a head for hair removal, heat dissipation assembly2, light source assembly3, power supply unit4and control circuit board5. The heat dissipation assembly2, the light source assembly3, the power supply unit4and the control circuit board5are installed in a housing6of the hair removal device. The control circuit board5is electrically connected with the light source assembly3and the power supply unit4to control the light source to emit pulsed light for hair removal. The power supply unit4can supply power to the light source assembly3. The head of the hair removal device1000is equipped with a Peltier cooler which provides a surface for hair removal. The control circuit board5controls the power supply unit4to excite the light source assembly3to emit pulsed light, and the pulse light transmits the surface for hair removal treatment. The heat dissipation assembly2is connected to the Peltier cooler1for heat dissipation. The housing6is provided with first air inlets60and an air outlet66. The hair removal device1000can also be provided with a power cord and/or a charging interface to be connected to an external power source.

The heat dissipation assembly2is mainly used for heat dissipation of the Peltier cooler1, and includes heat pipes21, a heatsink23connected to heat pipes, and a fan25. The heat pipes21are connected to the Peltier cooler1, so as to transfer heat generated by the Peltier cooler1to the heat dissipation assembly2for heat dissipation. The fan25is installed in a cavity28, one side of the cavity28extends to form an air outlet channel280, and the end of the air outlet channel280is connected to the air outlet66.

The first air inlets60, heat dissipation air paths of the heatsink, the fan25, the air outlet channel280, and the air outlet66communicate with each other to form a heat dissipation air path (as shown as the arrow inFIG.4) for the heatsink, that is, the first heat dissipation air path. The fan starts, cold air enters through the first air inlet60to the heatsink23to take away heat, is discharged from the fan25through the air outlet channel280and the air outlet66to outside so as for air cooling of the heatsink. The fan25is electrically connected with is controlled by the control circuit board5.

The cooler1installed on the head for hair removal can adopt the Peltier cooler in the prior art which provides a work surface for hair removal, and the work surface is cooled by the heat dissipation assembly2. In some embodiments, the cooler1installed in the head for hair removal is a Peltier cooler, and the Peltier cooler is used to cool the working surface so as to form a cold side. In a preferred embodiment, the cold side of the Peltier cooler1installed in the head of the hair removal device is used as the working surface. The Peltier cooler1adopts a transparent crystal directly as cold side10and as the working surface for contacting skin, specifically refer to the following description. The heat pipe21is connected to the hot side12of the Peltier cooler1, so as to transfer heat from the hot side12of the Peltier cooler1to the heat dissipation assembly2for heat dissipation.

The housing6includes an upper housing61and a lower housing62(the upper and lower positions are relative, here is only for convenience of description), and also includes a head housing63. In the first embodiment of the hair removal device, the upper housing61and/or the lower housing62are provided with second air inlets65corresponding to the light source assembly3. Preferably, both the upper and lower housings are provided with second air inlets65. The second air inlets65communicate with an air path of the light source assembly3, and is used for cold air to enter to the light source assembly3for dissipate heat.

The lower housing62is provided with an opening69, and the heatsink23is located behind the opening. The outer cover of the opening69is provided with a cover64, and the cover64is fastened to the opening69of the lower housing. Air holes68are provided in the baffle, and the air holes68may be one or more groups of through holes densely arranged. The air holes68are used to communicate the external environment with the air path inside the casing, specifically, the air path of the heatsink, so that cold air enter from the air holes to the heatsink23for air cooling and heat dissipation.

A gap between the edge of the cover64and the edge of the opening69of the lower housing is used as an air outlet66and a side air inlet67, the air outlet66communicates the air outlet channel280, and the side air inlet67is used for air cooling the heatsink. Referring toFIGS.1and7, the gap is formed between the cover64and the peripheral edge of the opening69of the lower housing62, wherein the gap at one side forms the air outlet66, and the gap at the other edges forms the side air inlet67. The side air inlet67communicate with heat dissipation air path of the heatsink23behind the lower housing62so that air enters from side to the heatsink23to increase the amount and speed of cold air, which can reduce water mist or water droplets to damage the control circuit board5due to air entering from front. The air holes68in the housing are used for air entering front, and the side air inlet67is used for air entering from side, thereby a multi-directional air enters from the first air inlets60to cool and dissipate heat from the heatsink, which can improve heat dissipation efficiency. The first air inlet60is used to introduce air to the surface of the heatsink, and preferably includes a side air inlet67formed by the gap between the cover64and the edge of the opening in lower housing, and also includes one or more groups of holes68in cover. In other embodiments, the first air inlet60is not limited to the side air inlet67and the air holes68.

The upper housing61is equipped with keys or key pads. The control circuit board5is installed behind the upper housing61.

The light source assembly3includes a light source31and a reflector32provided outside the light source. When the light source31is energized, pulsed light is generated, and the control circuit board5controls the power supply unit4to excite the light source. The pulsed light is emitted from the light source assembly and transmitted to the head for hair removal to the skin surface, thereby performing hair removal. In this embodiment, heat generated by the light source assembly3is also dissipated through the heat dissipation assembly2. The reflector32is made of heat-conducting material, and heat generated by the light source31is conducted to the reflector32for heat dissipation. Light source31can adopt lamp tube. The power supply unit4may be a capacitor battery or a power conversion module.

In the first embodiment of the present invention, the light source assembly3is installed in the light source frame7, the light source frame7is installed in the housing6and is positioned in the head, a reflective cover71is used to connect the head and the light source frame7, the pulsed light emitted from the light source assembly3is transmitted to the head through the reflective cover71. Both ends of the light source assembly3are installed in the light source frame7, and a light shading cover72(FIG.6) is provided in the light source frame7at each opposite end of the light source, and is used to guide air entering from the second air inlets65to the reflector for heat dissipation. The shading cover72is not only used to guide air, but also used to block the light to avoid light leakage at the two ends of the light source. The shading cover72can be in the shape of a plate, and the plate surface is inclined to the surface of the reflector32. The shading cover72can also be a sealing sleeve, which is sleeved outside the ends of the light source.

In this embodiment, at least one ventilation passage70is arranged in the light source frame7, and each ventilation passage70communicates the second air inlets65with the reflector of the light source, and communicates a space around the light source assembly namely an air-cooling chamber33. The ventilation passage70communicates the second air inlets65in the housing, and guides air entering from the second air inlets65to the light source assembly for heat dissipation. Preferably, at least one ventilation passage70is respectively provided in the upper and lower parts of the light source frame7, and correspondingly, the upper and lower housings61,62are provided with second air inlets65connected to the ventilation passage70.

The light source assembly3and the reflective cover71are installed in the light source frame7, and gaskets73are respectively set on the outer periphery of the light source assembly3and the reflective cover71for fixing and preventing light leakage.

In this embodiment, the light source assembly3connects an air guide cover30, and a space between the air guide cover30and the light source assembly3forms an air-cooling chamber33for heat dissipation of the light source assembly. The air-cooling chamber33corresponds to the space out of the light source assembly. The air-cooling chamber33is in air communication with the ventilation passage70defined in the light source frame7, and further in air communication with the second air inlets65in the housing6. The air path between the air-cooling chamber33and the cavity of the fan is installed is connected. The air-cooling chamber33surrounds the light source assembly3. Specifically, the reflector32of the light source is located an inner side of the air guide cover30, and the air-cooling chamber33is defined between the air guide cover30and the reflector32of the light source, and the air enters into the air-cooling chamber is used for reflector32for heat dissipation. The air guide cover30has shape and size corresponding to the reflector32of the light source and is installed beside the reflector to define the air-cooling chamber33. The air guide cover is configured to reduce a height thereof and maximize a surface area thereof, so as to form a negative pressure in the air-cooling chamber33when the fan is started for increasing air flow from the second air inlets65. Preferably, one side of the air guide cover30covering the reflector32is trumpet-shaped, and the other side thereof is configured with a hollow connection end34. The trumpet-shaped side is clamped and installed on the light source frame7. The hollow connecting end34communicates the air-cooling chamber33and the air path of the fan25. The hollow connecting end34is designed to maximize to air flow.

The second air inlets65in the housing6, the space out of the light source assembly, that is, the air-cooling chamber33, the cavity28for installing the fan, the air outlet channel280, and the air outlet66communicate with each other to form a heat dissipation air path of the light source assembly3, namely a second air cooling path. When the fan25starts, environmental air enter through the second air inlets65to the light source assembly, and heat is taken away from light source assembly by air. The hot air enters the cavity28and discharged to the air outlet channel280by the fan, and finally is discharged through the air outlet.66to outside, so as to perform air cooling and heat dissipation of the light source assembly3.

The air guide cover30is connected with a sealing member8. One side of the sealing member8is provided with an air guide connecting pipe81; one end of the connecting pipe81is connected to the hollow connecting end34of the air guide cover30so as to communicate with the air-cooling chamber33; the other end of the connecting pipe81is connected to the fan25. An annular sealing ring82is set at the other side of the sealing member8, and the annular sealing ring82is installed around the air inlet opening of the cavity of the fan25to prevent air leakage. Another annular sealing ring83is further provided to connect the annular sealing ring82of the sealing member8. The other annular sealing ring83is installed on the air outlet channel280of the cavity28to prevent air leakage.

In this embodiment, the fan25is installed inside the cavity28, and the cavity28includes an annular wall, which is fastened with a cover29to fix the fan25in the cavity. One side of the cavity28extends toward the air outlet66to form an inclined air outlet channel280which is able to prevent air from flowing backward. The air path between the air outlet250of the fan, the air outlet channel280defined by the cavity28and the air outlet66is communicated. A center opening of the cover29is aligned with the top or bottom opening of the fan cavity, and together form the air inlet of the fan. The annular sealing ring83of the sealing member is installed on the opening of the cover29to prevent air leakage.

First Embodiment of Peltier Cooler

With reference toFIGS.8-14together, the Peltier cooler1provided in the first

embodiment of the present invention, is installed in the head of the hair removal device, and provide a hair removal surface to contact with skin. Wherein, the Peltier cooler1adopts a transparent crystal directly as the cold side10and as the hair removal surface to contact with skin. The heat pipes21of the heat dissipation assembly2is connected to the hot side12of the Peltier cooler1, and transfers heat of the Peltier cooler1from the hot side12to the heat dissipation assembly2for heat dissipation. Peltier cooler1is fixed in head housing63. The head housing63is tightly assembled at front ends of the upper and lower housings61,62, and is tightly fixed with the light source frame7. The head can be further fixed by fasteners such as screws, positioning columns or buckle structures. The head housing63is assembled with the upper and lower housings61,62and the light source frame7.

The Peltier cooler1is electrically connected with the control circuit board5and the power supply unit4. The control circuit board5controls the light source assembly3to emit pulsed light that transmits the Peltier cooler1for hair removal. The control circuit board5can also be used to control the Peltier cooler1work. It can be understood that the Peltier cooler1can also be provided with an independent power supply or an independent control circuit board to individually control the Peltier cooler1to work.

One end of heat pipes21connect a thermally conductive member22, and thermally conductive member22connects the hot side12of Peltier cooler1, is used for transfer heat of the hot side12of the Peltier cooler to heat pipes21through the thermally conductive member22for heat dissipation by heat pipes21and the heatsink23. The heatsink23is a plate fin heatsink.

The thermally conductive member22is generally a metal member, preferably copper, and the shape of thermally conductive member22is adapted to the shape of the hot side12of the Peltier cooler1, and is in contact with the hot side12of the Peltier cooler1for rapid heat transfer. There is refrigerant filled in the heat pipes21, and the heat pipes are fixed on the surface or inside of the plate fin heatsink23. The heat pipes21are preferably copper pipes. One end or a section of heat pipes21connected to the Peltier cooler1form a ring24, which is adapted to the shape and size of the hot side of the Peltier cooler1. The thermally conductive member22has a contour corresponding to the ring24of heat pipes21, and thermally conductive member22and the ring24of heat pipes21are sleeved and attached to each other. The heat conducting member22and the annular shape24of heat pipes can be soldered to form a ring fit, so that heat can be quickly transferred to heat pipes21. In this embodiment, heat conducting member22is in the shape of a metal ring. The ring24of heat pipes21absorbs heat, and the refrigerant inside flows to one end of the heatsink23after absorbing heat and evaporates, and circulates back to the ring section to continue absorbing heat after being condensed and cooled by the heatsink.

The fan25of the heat dissipation assembly cooperates with the fin heatsink23for discharge of hot air in the ducks of the fin heatsink23. The heatsink23and fan25are arranged up and down, and the air paths communicate. The fin heatsink23is installed inside the housing and behind the cover64of the lower housing. The air holes68provided in the cover64and the side air inlets67communicate with air ducts of the heatsink23. The air duct of the heatsink communicates with the air path of the fan25, so that the hot air in the ducks of the heatsink flows to the fan, and discharged by the fan to the air outlet channel280and then discharged from the air outlet66to outside. The fin heatsink23is installed on one side of the air inlet of the fan25.

In the present embodiment, the fan25and the cavity28are used for heat dissipation of the light source assembly3and the heatsink23of the Peltier cooler, for drawing in cold air and discharging hot air. Specifically, the fan25is started, and the ambient cold air is drawn from the second air inlets65and the first air inlet60(that is, the side air inlet67/air holes68), and the cold air from the second air inlets65enters into the air-cooling chamber33of the light source assembly to transfer heat of the light source assembly, and flows to the fan25. The cold air from the air inlet67/air holes68transfer heat from the heatsink23and then flows to the fan25. Finally, the fan25discharges the hot air from the air outlet66after the air channel280to the external environment, and perform heat dissipation for the light source assembly3and the heatsink23, and the heatsink23dissipates heat and cools heat pipes, thereby performing cooling the Peltier cooler1.

The Peltier cooler1of this embodiment of the present invention comprises a cold side10, a semiconductor pillar layer11with metal conductors, and a hot side12. The semiconductor pillar layer11is located between the cold side10and the hot side12. Wherein, the cold side10of the Peltier cooler is made of transparent crystal, thereby forming a transparent crystal cold side; the inner surface of the cold side10is fixedly connected with the metal conductors of the semiconductor pillar layer11. The hot side12of the Peltier cooler is a ceramic substrate, and the inner surface of the hot side is fixedly connected with the metal conductors of the semiconductor pillar layer11. The ceramic hot side12and the transparent crystal cold side10sandwich the semiconductor pillar layer11therein to form the Peltier cooler1. The ends of the semiconductor pillar layer11are connected with positive and negative electrodes113. The transparent crystal can be transparent materials with high light transmission, high thermal conductivity, and high heat resistance, such as natural crystals or diamonds.

The semiconductor pillar layer11is fixedly connected between the transparent crystal cold side10and the ceramic hot side12, which can be obtained using methods in the prior art. For example, the inner surfaces of the transparent crystal cold side10and the ceramic hot side12are firstly metallized, and then welded to the metal conductors of the semiconductor pillar layer11to form a soldering fixation. Alternatively, the semiconductor pillar layer11is bonded to the crystal cold side10and the ceramic hot side12by thermally conductive adhesive to form a bonding fixation.

In this embodiment, the semiconductor pillar layer11is annular-shaped, which has annular region111used for arranging electronic components, and a hollow region112is for light transmitting. The semiconductor pillar layer11are formed by p & n-type semiconductor pillars with metal conductors to form circuit. Using the Peltier effect of the semiconductors, when the direct current passes through the p & n-type semiconductor pillars placed in series, there will cause a temperature difference between two sides, heat will be transported from one side to the other. The heat is transported from the transparent crystal cold side10to the ceramic hot side12of the Peltier cooler. Of course, other suitable materials instead of ceramic can also be used to make the hot side.

The shape and size of the ceramic hot side12are adapted to the semiconductor pillar layer11, for example, it is also annular-shaped, which has annular region121as a heat dissipation surface, and a hollow region122for light transmitting. The annular shape of the ceramic hot side12fits with the annular shape of the semiconductor pillar layer11for rapid heat dissipation. The hollow regions of the ceramic hot side12and the semiconductor pillar layer11are aligned and communicated.

The transparent crystal cold side10covers the entire surface of the semiconductor pillar layer11, and forms a cold side. The transparent crystal cold side10is a whole piece or a whole crystal with a continuous surface. Preferably, the thickness of the transparent crystal cold side is not less than 1 mm, so as to improve the strength of the Peltier cooler1, reduce the damage risk of assembly, and prolong the service life. The transparent crystal material of this embodiment has high light transmittance and high thermal conductivity, so that the pulsed light can transmit the transparent crystal for hair removal operation, and the high thermal conductivity is beneficial to improve the cooling efficiency and effect.

The transparent crystal cold side10has a light-transmitting region102, and a peripheral annular region101fitfully bonded to the semiconductor pillar layer11. Correspondingly, the light-transmitting region102of the transparent crystal cold side covers on the hollow region112of the semiconductor pillar layer11, so that the hollow region is covered and allows light to transmit through. The entire cooling area of the transparent crystal cold side10includes a transparent region102and an annular region101around the transparent region. The entire surface of the crystal is cooled, which increases the cooling area and provides a better experience.

Referring toFIG.12, the annular region101of the transparent crystal cold side10forms an annular shading region (the shaded part inFIG.12) after light-shielding treatment, which is used to shield the internal electronic components. Specifically, the light-shielding treatment can be performed by coating a light-shielding film on one or both sides of the transparent crystal, and then removing the light-shielding film at the corresponding position in of the light-transmitting region; or, by printing a shielding layer directly on the annular region of the transparent crystal without light-transmitting region. The shading area is formed by surface treatment of the crystal cold side10, which can be treated on both sides or any one side of the crystal, and can be treated by coating, spraying, printing or other methods.

The edges of the transparent crystal cold side10can be further processed to form an assembly position103(refer toFIG.13), which is used for fixed assembly with an external housing (such as a head housing). In a more specific example, the assembly position103can be a beveled edge or a stepped surface, which can form a snap fit with the head housing63.

Other Various Embodiments of Peltier Cooler

In other embodiments, the Peltier cooler1includes a semiconductor pillar layer11and a hot side12and a cold side10at opposite sides of the semiconductor pillar layer. The cold side10is made of transparent crystal to form a transparent crystal cold side. The surface of the transparent crystal is fixedly connected with one or more sets of the semiconductor pillar layers11and the hot sides12fixedly connected with the semiconductor pillar layers. The Peltier cooler has a light-transmitting region102provided by the transparent crystal.

Where the one or more sets of semiconductor pillar layers and the hot sides correspondingly fixed with semiconductor pillar layers are arranged at one side, opposite sides or multiple sides of the transparent crystal cold side.

With reference toFIG.15, the Peltier cooler1of the second embodiment of the present invention, the cold side10is a square (not limited to square) transparent crystal, one side of transparent crystal such as the left side is provided with a pair of semiconductor pillar layer11and hot side12fixedly connected with the semiconductor pillar layer. The semiconductor pillar layer11is provided with a pair of electrodes (not shown). The other two pairs of sides of the transparent crystal, such as the front and rear (or upper and lower) sides, can be used as the light-transmitting region102for the transmission of pulsed light for hair removal treatment. In a specific example, the hot side12of the Peltier cooler is made of a ceramic substrate to form a ceramic hot side. The inner surface of the ceramic substrate is fixedly connected with the metal conductors of the semiconductor pillar layer11. The semiconductor pillar layer11is sandwiched between the ceramic hot side12and the crystal cold side10. The hot side12and the transparent crystal cold side10are attached and fixed to opposite sides of the semiconductor pillar layer11respectively. The transparent crystal cold side10covers the entire surface of the semiconductor pillar layer11and provides a cold side.

Further referring toFIGS.16(a)-16(f), the Peltier cooler1of the second embodiment of the present invention is connected with the heat dissipation assembly2, and heat of the Peltier cooler is transferred from the hot side12to the heat dissipation assembly for heat dissipation. The heat dissipation assembly2includes a heat pipe21and a heatsink23connected to heat pipe21. The heat pipe is installed on the surface or inside of the heatsink. The heat pipe21is in direct contact with the hot side12of the Peltier cooler1or connect the hot side through a heat conducting member. In this embodiment, one end26of heat pipes are adapted to the shape of the hot side12of the Peltier cooler, and is in contact with each other; The end of the hot side12is bent, and the various bending shapes are shown in the figures, for example, L-shaped. The heat pipe21can be a capillary copper tube with circulating refrigerant filled inside. The heatsink is one or a combination of plate fin heatsinks, plate fins or thermally conductive plates. Various heatsink structures as shown in the figures, use the plate fin heatsink23shown inFIG.16(a)andFIG.16e), for example, one or more sets of are arranged in parallel, and heat pipe21is inserted through and fixed in the parallel plate fins.16(b),16(c),16(d), and16(f), the heatsink23includes a thermally conductive base plate230and a group of parallel plate fins231fixed on one side of thermally conductive base plate230. One end26of heat pipe21is bent and in contact with the hot side12of the Peltier cooler, and can be adapted for shape and size. The heat pipe21is fixed on the other side of thermally conductive base plate230, or inserted through one or more groups of parallel plate fins231. The heatsink can be made of metal sheet with high thermal conductivity.

Referring toFIG.17, in the Peltier cooler1of the third embodiment of the present invention, the cold side10is a square (not limited to a square) transparent crystal, and two pair of semiconductor pillar layers and hot side12each fixedly connected to the semiconductor pillar layer are respectively arranged on the opposite sides of the transparent crystal such as the left and right sides layer11. Each semiconductor pillar layer11is provided with a pair of electrodes (not shown). The other opposite sides of the transparent crystal, such as the front and rear sides (or the upper and lower surfaces), can be used as the light-transmitting region102for transmitting pulsed light for hair removal treatment. In a specific example, the hot sides12are made of ceramic substrates to form ceramic hot sides. The inner surface of each ceramic substrate is fixedly connected with the metal conductors of the corresponding semiconductor pillar layer11. The semiconductor pillar layer11is sandwiched between the ceramic hot side12and the crystal cold side10. The two hot sides12and the transparent crystal cold side10are attached and fixed to the opposite sides of the corresponding semiconductor pillar layer11respectively. The two sides of the transparent crystal cold side10respectively cover the entire surface of a corresponding semiconductor pillar layer11and provide a cold side.

Referring further toFIGS.18(a) to18(c), in the third embodiment of the present

invention, the Peltier cooler1is connected to the heat dissipation assembly2, and heat of the Peltier cooler is transferred from the hot side12to the heat dissipation assembly for heat dissipation. In this embodiment, the heat dissipation assembly2includes two heat pipes21and a heatsink23connected to heat pipes21. The heat pipes are installed on the surface or inside of the heatsink23. The heat pipe21is in direct contact with the hot sides12of the Peltier cooler1or is in contact with the hot sides through a heat conducting member. For example, one end26of each heat pipes are adapted to the shape of the hot side12of the Peltier cooler, and is in contact with each other; The end of the heat pipe is bent, referring to the various bending designs shown in the figures, such as L-shape. The heat pipe21can be a capillary copper tube with circulating refrigerant inside. The heatsink is one or a combination of plate fin heatsinks, plate fins or thermally conductive plates. Among the various heatsink structures shown in the figures, the heatsink23shown inFIG.18(a)is one or more sets of plate fins arranged in parallel, and two heat pipes21are fixed to the one or more sets of parallel fins. InFIG.18(b)andFIG.18(c), the heatsink23includes a thermally conductive base plate230and one or more groups of parallel plate fins231fixed on one side of thermally conductive base plate230. One end26of each heat pipe21is bent and in contact with a hot side12of the Peltier cooler, and the shape and size are adapted. The heat pipes21are fixed on the other side of thermally conductive base plate230or inserted through a group of parallel plate fins231installed on its surface. The heatsink can be made of metal sheets with high thermal conductivity. There can be provided with two thermally conductive base plate230each used to fix one heat pipe21.

With reference toFIG.19, the Peltier cooler1of the fourth embodiment of the present invention, the cold side10is a square (not limited to square) transparent crystal, one side of transparent crystal such as upper side is provided with a semiconductor pillar layer11with a hot side12fixedly connected. The semiconductor pillar layer11is provided with a pair of electrodes (not shown). The other opposite sides of the transparent crystal, such as the front and rear (or left and right) sides, can be used as the light-transmitting region102for the transmission of pulsed light for hair removal treatment. In a specific example, the hot side12of the Peltier cooler is a ceramic hot side12. The inner surface of the ceramic hot side12and the transparent crystal are welded and fixed to the metal conductors of the semiconductor pillar layer11after metallization, so as to be respectively fixed on both ends of the semiconductor pillar layer11. The transparent crystal cold side10covers the entire surface of the semiconductor pillar layer11and provides a cold side.

Further referring toFIGS.20(a)˜20(d), the Peltier cooler1of the fourth embodiment of the present invention is connected with the heat dissipation assembly2, and heat of the Peltier cooler is transferred from the hot side12to the heat dissipation assembly for heat dissipation. The heat dissipation assembly2includes a heat pipe21and a heatsink23connected to heat pipe21. Among the various heatsink structures shown in the figure, the heatsink23shown inFIG.20(a)andFIG.20(b)is a group of parallel plate fins, and heat pipe21is fixed on the parallel plate fins. InFIG.20(c)andFIG.20(d), the heatsink23includes a thermally conductive base plate230and a group of parallel plate fins231fixed on one side of the thermally conductive base plate230. One end26of heat pipe21is in contact with the hot side12of the Peltier cooler, and can be adapted for shape and size. The heat pipe21is fixed on the other side of thermally conductive base plate230, or is inserted through and fixed in a set of parallel plate fins231or installed on the surface. The heat pipe21is bent into a U-shape or an L-shape, so as to obtain a close contact with the hot side12.

With reference toFIG.21, the Peltier cooler1of the fifth embodiment of the present invention, the cold side10is a square (not limited to square) transparent crystal, and the opposite sides of transparent crystal such as upper and lower sides are each provided with a semiconductor pillar layers11fixedly connected with one hot side12. Each semiconductor pillar layer11is provided with a pair of electrodes (not shown). The other two opposite sides of the transparent crystal, such as the front and rear (or left and right) sides, can be used as the light-transmitting region102for the transmission of pulsed light for hair removal treatment. In a specific example, the hot sides12are ceramic hot sides, and the inner surface of each ceramic hot side is metallized and welded to the metal conductors of the corresponding semiconductor pillar layer11. Each semiconductor pillar layer11is sandwiched between one ceramic hot side12and an upper side or a lower side of the transparent crystal cold side10. The hot side12and the transparent crystal cold side10are attached and fixed to the opposite sides of the corresponding semiconductor pillar layer11respectively. The upper and lower sides of the transparent crystal respectively cover the entire surface of the corresponding semiconductor pillar layer11and the transparent crystal provides a cold side.

Further referring toFIGS.22(a)˜22(e), the Peltier cooler1of the fifth embodiment of

the present invention is connected with the heat dissipation assembly2, and heat of the Peltier cooler is transferred from the hot sides12to the heat dissipation assembly for heat dissipation. In this embodiment, the heat dissipation assembly2includes two heat pipes21and a heatsink23connected to heat pipes21. The heat pipes are installed on the surface or inside of the heatsink. One end26of each heat pipes are in close contact with each hot side12, and heat pipes21can be L-shaped or U-shaped or other suitable shapes to obtain a close contact with the hot side12. Among the various heatsink structures shown in the figures, the heatsink23shown inFIG.22(a),FIG.22(b), andFIG.22(c)is one or more sets of parallel fins, and two heat pipes21are inserted and fixed in parallel plate fins. The heatsink23inFIG.22(d)andFIG.22(e)includes a thermally conductive base plate230and one or more sets of parallel plate fins231fixed on one side of thermally conductive base plate230. One end26of each heat pipe21is bent and in contact with one hot side12of the Peltier cooler, and can be adapted for shape and size. The heat pipe21is fixed on the other side of thermally conductive base plate230or inserted in the one or more sets of parallel plates231.

Apply the Peltier cooler1and heat dissipation assembly2of the second to fifth embodiments (FIGS.15to22(e)) in the hair removal device1000(FIGS.1-7) of the foregoing embodiment, the Peltier cooler1installed in the head for hair removal of the hair removal device, the transparent crystal cold side is used as the hair removal working surface. The heat dissipation assembly2is installed inside the housing6. The heatsink23is installed below the fan25, and cooling air ducts of the heatsink23communicate with the cavity28, and the hot air from the heatsink23is discharged to the cavity28by the fan25and discharged to the outside from the air outlet66. Refer to the foregoing embodiments for other structures, and details are not repeated here.

In other embodiments, the hot side12of Peltier cooler1can also adopt other existing available materials instead of ceramic, for example, hot side12can be made from transparent materials to cover the semiconductor pillar layer11.

Further, it can be understood that the transparent crystal cold side of Peltier cooler1can also be made from other transparent materials.

The Second Embodiment of the Hair Removal Device

With reference toFIGS.23-26(e), the second embodiment of the hair removal device1000of the present invention, same as the first embodiment, includes a head for hair removal, a heat dissipation assembly2, a light source assembly3and light source heat dissipation assembly, a power supply unit4and a control circuit board5. The heat dissipation assembly2, the light source assembly3, the light source heat dissipation assembly, the power supply unit4and the control circuit board5are installed in the housing6of the hair removal device. The control circuit board5is electrically connected with the light source assembly3and the power supply unit4to control the light source to emit pulsed light for hair removal. The power supply unit4is used to supply power to the light source assembly3. The head for hair removal of the hair removal device1000is equipped with a Peltier cooler to provide the hair removal work surface, and the control circuit board5controls the power supply unit4to excite the light source assembly3to emit pulsed light, and the pulse light transmits the hair removal work surface for hair removal treatment. The heat dissipation assembly2is connected to the Peltier cooler1for cooling. The housing6is provided with a first air inlet60and an air outlet66. The hair removal device1000can also be provided with a power cord and/or a charging interface to be connected to an external power source.

The heat dissipation assembly2for the Peltier cooler1includes the heat pipe(s)21, the heatsink23connected to heat pipes, and a fan25. The heat pipe21is connected to the Peltier cooler1, so as to transfer heat from the Peltier cooler1to the heat dissipation assembly2for heat dissipation. The fan25is installed inside or outside a cavity28, the cavity28extends to form an air outlet channel280, and the end of the air outlet channel280is connected to the air outlet66. It can be understood that multiple and/or multi-directional air outlets can be provided to connect the air outlet channel280, and correspondingly, air outlets66can be arranged on multiple sides of the housing6to form multiple or multi-directional air outlets accordingly.

The first air inlet60, the air ducts of the heatsink, the fan25, the air outlet channel280, and the air outlet66are in air communication with to form a heat dissipation air path (as the arrow inFIG.4), that is, the first heat dissipation air path (for cooling the Peltier cooler). The fan starts, environmental air enters through the first air inlet60to the heatsink23for heat dissipation, flows to the fan25and is discharged by the fan25the outside through the air outlet channel280and the air outlet66so as to perform heat dissipation for the Peltier cooler. The fan25is electrically connected with and controlled by the control circuit board5.

The cold side of the Peltier cooler1of above-mentioned each embodiment directly provides the hair removal surface of the head. Peltier cooler1adopts transparent crystal directly as cold side10and as the hair removal surface in contact with skin in use. The heat pipe21is connected to the hot side12of the Peltier cooler1, so as to transfer heat from the hot side12of the Peltier cooler1to the heat dissipation assembly2for heat dissipation.

Different from the first embodiment of the hair removal device, in the present embodiments, the second air inlets65may not be defined in the housing6, and the second air inlets65are not set for waterproof and dustproof.

As description in the first embodiment of the hair removal device, the first air inlet60and the air outlet66are arranged in the housing6. The air outlet66in this embodiment can be provided in multiples or in multiple groups, and can be arranged in different positions or different directions in the housing6, corresponding to the air flow direction in the fan25, so as to form multi-directional air outlets and discharge heat in time.

Inside the housing6, the heatsink23and the fan25can be installed up and down. Environmental air enters through the air inlet60in the housing6to the air ducts of the heatsink23; where the top or the bottom the cavity28(or fan housing) defines openings, so that air ducts of the heatsink23are connected with the air paths inside the fan25, hot air enters the fan25from air ducts of the heatsink23, is discharged by the fan25through the air outlet250at the side of the fan25, the air path280and the air outlet66to outside. The air inlet60is preferably arranged in the housing6corresponding to the position of the heatsink23for the Peltier cooler and the heatsink23′ for the light source described below, so that the air can quickly flow to the heatsinks23,23′ through the air inlet60. The air inlet60can be one or one or more groups of holes or slots defines in the housing6(the upper housing61and/or the lower housing62and/or the cover64), or it can be gap between the edges of the cover and the housing. There may also be multiple air outlets66.

The light source assembly3includes a light source31and a reflector32provided out of the light source. When the light source31is energized, pulsed light is emitted, and the control circuit board5controls the power supply unit4to supply power to the light source. The pulsed light is emitted from the light source assembly and transmitted to the head for hair removal, thereby performing hair removal.

The heat from the light source assembly3is dissipated by the heat dissipation assembly for the light source assembly. The reflector32is made of heat-conducting material, and heat from the light source31is transferred to the reflector32for heat dissipation. Light source31can be a lamp tube. The power supply unit4may be a capacitor battery or a power conversion module. The light source31can be a lamp tube, and when the light source energized to emit lights which is reflected by the reflector32, the temperature of the reflector32is high, so it is necessary for heat dissipation. The heat dissipation assembly for the light source assembly can cooperate with the heat dissipation assembly for the Peltier cooler. The reflector32has high thermal conductivity and good reflective effect.

A heat dissipation assembly for the light source assembly includes a heat pipe21′, a heatsink23′ and a fan25(shared with the fan in the heat dissipation assembly2for the Peltier cooler). The heat pipe21′ is connected between the light source assembly3and the heatsink23′, and transfers heat from the light source assembly3to the heatsink23′ for heat dissipation. The heatsink23′ is arranged in a heat dissipation air path which communicates the air inlet60, the fan25and the air outlet66; and the heatsink23′ is cooled through the heat dissipation air path.

Different from the first embodiment of the hair removal device, in this embodiment, the light source assembly3includes a thermally conductive cover30′, and thermally conductive cover30′ is made of thermally conductive materials, is adapted for the shape of the reflector32, and cover the back of the reflector32. thermal grease can be pasted or coated between the reflector32and thermally conductive cover30′, so as to quickly transfer heat from the reflector32to thermally conductive cover30′. One side of thermally conductive cover30′ is provided with a half cup-shaped (or trumpet-shaped) cover body35, which fits and covers the back of the reflector32, and the other side is provided with a tubular slot34′ for riveting/welding/attaching heat pipe21′ (that is, a copper tube or a capillary copper tube), which transfers heat to heat pipe21′. To facilitate assembly and fixation, thermally conductive cover30′ also includes a fixing plate36, for example, the half cup-shaped (or trumpet-shaped) cover body35and a tubular slot34′ are located at opposite sides of the fixing plate36. One end of heat pipe21′ is inserted in the tubular slot34′ of thermally conductive cover30′, and contacts with each other, and thermal grease can be pasted or coated therebetween, so that heat from the reflector32is rapidly transferred through thermally conductive cover30′ to heat pipe21′. There is refrigerant inside the heat pipe21′. In this embodiment, heat pipe21′ is bent into a U shape or an L shape, and one end (or a section)26thereof is inserted into the tubular slot34′ of thermally conductive cover30′, and riveted/welded/attached to the inner wall of the tubular slot34′. The other end or both ends of heat pipe21′ is equipped with a heatsink23′. The refrigerant (liquid) inside heat pipe21′ (copper pipe) absorbed the heat and evaporate, flows in the heat pipe21′ due to the pressure inside the pipe for heat exchange, and the heat is transferred to the heatsink23′ (such as copper/aluminum sheet), and the other end of the heatsink23′ and heat pipe21′are set between the air outlet250of the fan25and the air outlet channel280, or installed in the air outlet channel280, so that air can take away heat from the heatsink23′. Due to temperature difference, the refrigerant vapor in heat pipe21′ will condense into liquid again and flow to one end or a section26of heat pipe21′. Such repeated circulation can dissipate heat from the reflector32. In other alternative embodiments, the back of the reflector is provided with a tubular slot34′, and one end or a section of the heat pipe are sleeved in the tubular slot34′ to transfer heat to the heat pipe; In this case, thermally conductive cover30′ is not necessary.

In this embodiment, the heatsink23′ is arranged in the heat dissipation air path, that is, the heatsink23′ is arranged in the air path which communicate the air inlet60, the fan25, the air outlet channel280, and the air outlet66. The air flow direction in the air path is opposite to that of the reflector, that is, the direction away from the reflector32or the light source31.

In some embodiments, a fan25is installed inside the cavity28(as shown inFIG.3,FIG.7, andFIG.23), and an air outlet channel280is provided at one side of the fan. The air outlet250of the fan25communicates with the air outlet channel280, and is in air communication with the air outlet66in the housing6. The fan25, the air outlet channel280, and the air outlet66in the housing are in air communication with to form a heat dissipation air path. The heatsink23′ is arranged in the air path.

In the present embodiment, the heatsink23′ is arranged in cooling air duct, when the reflector32dissipates heat, cooling air may not flow to the reflector32and thermally conductive cover30′, air from the heatsink23for the Peltier cooler flows through the fan25, blows out to the heatsink23′ of the reflector32, and flows to the outside of the housing6. The air outlet66can be arranged on both sides of the fan or in the rear of the housing.

It can be understood that the heatsink23′ for the light source and the heatsink23for the Peltier cooler can be the same heatsink. The fan of the heat dissipation assembly for the light source assembly can also be separate one from the fan25.

In this embodiment, the heat dissipation assembly for the light source assembly has advantages that heat dissipation efficiency can be improved, and the first air inlet65and the ventilation passages70in the front of the device are not necessary, which can improve the waterproof and dustproof of the device.

Various Embodiments of Heat Dissipation Assembly for the Light Source Assembly

In various embodiments of the heat dissipation assembly for the light source assembly, with reference toFIG.23andFIGS.26(a)˜26(e) again, the cooling system for the light source assembly includes the above-mentioned heat pipe21′ and the heatsink23′, also includes the fan25(also for the heat dissipation assembly for the Peltier cooler) in the housing6. The heatsink23′ includes plate fins, which can be one or more sets of parallel plate fins; or the heatsink23′ includes a thermally conductive base plate230and one or more sets of parallel plate fins231fixed on one side of thermally conductive base plate230. A cooling air duct is formed between the two parallel plates. One end or section26of the heat pipe21′ is inserted into the tubular slot34′ of thermally conductive cover30′ (or reflector32). The other end of the heat pipe21′ is fixed (riveted/welded/attached) to the other side of the base plate230, or inserted (riveted/welded/attached) in one or more sets of parallel plate fins231or fixed on the surface of the plate fins, so as to quickly transfer heat from the light source assembly to the heatsink23′ for heat dissipation.

In the two examples shown inFIGS.26(a) and26(b), the heatsink23′ includes a thermally conductive base plate230and a set of parallel plate fins231fixed on one side of the thermally conductive base plate230. The heat pipe21′ is bent into an L shape, one end26is inserted into the tubular slot34′ of thermally conductive cover30′, and the other end is fixed (riveted/welded/attached) to the other side of thermally conductive base plate230. The fan25with an air inlet251is arranged with the heatsink23up and down, that is, the heatsink23for the Peltier cooler is installed on the top or bottom of the fan25, and the air ducts of the heatsink23for the Peltier cooler is in air communication with the fan through the air inlet251. The fan provides an air outlet250. The air inlet251, the air outlet250and the inner side the fan is in air communication. The cavity28in this specific example is different from the previous embodiments. The fan25is located outside the cavity28, the cavity28is arranged outside the air outlet250of the fan25, and the cavity28provides the air outlet channel280. Air discharged from the air outlet250of the fan25flows to the air outlet66through the air outlet channel280. The heatsink23′ for the light source is installed between the air outlet250of the fan25and the air outlet channel280, and can also be arranged inside the air outlet channel280. The cooling air ducts of the heatsink23′ for the light source is located between the air outlet.250and the air outlet channel280, so that the air discharged by the fan25blows to the surface of the heatsink23′, and the hot air after cooling the heatsink23′ is discharged through the air outlet channel280and the air outlet66. At the end of the air outlet channel280, a plurality of air outlets can be defined in the cavity28corresponding to the air outlet66in the housing. It can be understood that the cavity28may be a part separately arranged inside the housing of the hair removal device, or may be a part of the housing.

In the embodiment as shown inFIG.26(c), compared with the two embodiments as shown inFIGS.26(a) and26(b), the difference is that a tubular section232is provided, for example, by being integrated or soldered, on one side of thermally conductive base plate230. The end of heat pipe21′ is fitted in the thermally conductive tube2for heat dissipation. A set of parallel cooling fins231are set on the other side of the thermally conductive base plate230for heat dissipation. The heatsink23′ is located in the air path outside the air outlet250, and the cooling air ducks of heatsink23′ communicate the cooling air path between fan25and the air outlet66.

In the embodiment as shown inFIG.26(d), heat pipe21′ is bent into a U shape, and a section26of the integral U-shaped pipe is inserted into the tubular slot34′ of thermally conductive cover30′. Each of opposite ends of heat pipe21′ is fixed (riveted/welded/attached) with one thermally conductive base plate230. A set of parallel plate fins231is welded to one side of each thermally conductive base plate230, that is, each of opposite ends of heat pipe21′ respectively connect a heatsink23′, and the two heatsinks23′ are placed opposite to each other, and are located in the cooling air path outside the outlet hole250of the fan.

In the embodiment as shown inFIG.26(e), the difference with respect to the embodiment as shown inFIG.26(d)is that a tubular section232is provided, for example, by being integrated or soldered, on one side of each thermally conductive base plate230. Each end of heat pipe21′ is fitted in the corresponding heat pipe232. A set of parallel cooling fins231are set on the other side of each thermally conductive base plate230for heat dissipation.

Other structures of the hair removal device in these embodiments are similar to the first embodiment of the hair removal device, where the light source assembly3is installed in the light source frame7, and the light source frame7is installed in the head. the head and the light source frame7are connected by a reflective cover71, and the pulsed light emitted from the light source assembly3is transmitted to the head through the reflective cover71for hair removal. In this embodiment, the sealing member8may be an annular sealing ring, which is installed around the air inlet251at the top or bottom of the fan25to prevent air leakage.

Third Embodiment of the Hair Removal Device

In foregoing each embodiment, the cold side10of the Peltier cooler1is made of transparent materials, and the cold side preferably is a transparent crystal which provides a depilatory surface in contact with skin. The hair removal surface is located at the front end of the hair removal device, that is, at the front end of the head. Preferably, the transparent crystal cold side (or transparent cold side) can provide one entire side surface as the hair removal surface, thereby forming a cooling effect on the whole front-end surface. The advantage of whole-surface cooling is that: the skin can be pre-cooled during hair removal, and can continue to be cooled after hair removal so as to reduce burning sensation after hair removal, which can prolong the time for cooling the skin.

With reference toFIGS.27-28, same as previous embodiments, the hair removal device1000of present embodiment comprises a head, a heat dissipation assembly2, a light source assembly3, a heat dissipation assembly for the light source assembly, a power supply unit4, and a control circuit board5. The heat dissipation assembly2, the light source assembly3, the heat dissipation assembly for the light source assembly, the power supply unit4and the control circuit board5are installed in the housing6of the hair removal device. The control circuit board5is electrically connected with the light source assembly3and the power supply unit4to control the light source to emit pulsed light for hair removal. The power supply unit4is used to supply power to the light source assembly3. In this embodiment, the head for hair removal of the hair removal device1000is equipped with a cooler1′ and a transparent crystal (or transparent)10′. The transparent crystal (or transparent)10′ provides an entire front face of the depilatory head (or hair removal device) as a hair removal surface in direct contact with the skin. The control circuit board5controls the power supply unit4to excite the light source assembly3to emit pulsed light, and the pulsed light transmits the hair removal surface for depilatory treatment. The heat dissipation assembly2is connected to cooler1for cooling. The housing6defines a first air inlet60and an air outlet66. The hair removal device1000can also be provided with a power cord and/or a charging interface to be connected to an external power source.

Compared with the above-mentioned embodiments, the hair removal device in this embodiment has a different head, where the transparent crystal (or transparent)10′ provides the depilatory work surface in contact with the skin. Preferably, the transparent crystal (or transparent)10′ provides the entire surface of the hair removal surface, thereby forming a cooling effect on the entire front end of the head. The transparent crystal (or transparent)10′ is cooled by the cooler1′ attached on the back of the transparent crystal. The head housing63is an annular housing, and the transparent crystal (or transparent)10′ is clamped and installed in the annular housing. The cooler1′is also fastened in the head housing63, and attached to the back of the transparent crystal (or transparent medium)10′. There may be one cooler1′ installed on one side of the transparent crystal (or transparent medium)10′, or there may be coolers1′installed on multiple sides accordingly. The cooler1′ installed in the head for hair removal can be a cooler of prior art to cool the transparent crystal (or transparent medium) hair removal surface, and the heat dissipation assembly2of the aforementioned embodiment can be used for the cooler1′ to dissipate heat.

In accordance with a preferable embodiment, the cooler1′ installed in the depilation head is a Peltier cooler. The transparent crystal (or transparent) working surface are cooled using the Peltier cooler. Specifically, a transparent crystal (or transparent)10′ is attached on a cold side of the Peltier cooler in the head, and the transparent crystal (or transparent)10′ is directly used as the hair removal surface in contact with the skin. Preferably, the transparent crystal (or transparent)10′ provides one side surface as the hair removal surface, thereby forming a cooling effect on the entire front end of the head. The transparent crystal (or transparent)10′ is cooled by the Peltier cooler1′ attached to its back. The depilatory head housing63is an annular shell, and the transparent crystal (or transparent)10′ is clamped and installed in the annular housing, and the Peltier cooler1′is also clamped in the head housing63. The cold side10is attached to the back of the transparent crystal (or transparent)10′.

The Peltier cooler1′ has a light-transmitting region102. It can be understood that the Peltier cooler1′ can adopt the above-mentioned Peltier cooler of which the light-transmitting region102is provided by a transparent crystal cold side. In this embodiment, the Peltier cooler1′ is annular-shaped, and the center hole forms the light-transmitting region102. The Peltier cooler1′ comprises a semiconductor pillar layer11, and a hot side12and a cold side10at both ends of the semiconductor pillar layer. The Peltier cooler1′is annular-shaped, correspondingly, the hot side12and the cold side10and the semiconductor pillar layer11are all annular-shaped. The annular hot side12and the annular cold side10are layered in alignment and soldered at opposite ends of the annular semiconductor pillar layer11. The center hole forms the light-transmitting region102. The hot side12and the cold side10can be ceramic substrates to form the ceramic hot side and the ceramic cold side, and other materials in the prior art can also be used for the cold side and hot side. The cold side10is attached on the back of the transparent crystal (or transparent)10′ to cool the transparent crystal (or transparent)10′. The transparent crystal (or transparent)10′ covers the entire front surface of the cold side10, and are assembled with the largest contact surface.

Transparent crystal (or transparent)10′ and Peltier cooler1′ are fixed using the head housing63, and transparent crystal (or transparent)10′ is positioned at a front end of the head (hair removal device), and used as depilatory work surface. The head housing63is tightly assembled with the front ends of the upper and lower housings61,62, and is tightly assembled with the light source frame7. The head can be further fixed by fasteners such as screws, positioning columns or buckle structures. The housing63is assembled with the upper and lower housings61,62and the light source frame7.

The Peltier cooler1′is electrically connected with the control circuit board5and the power supply unit4. The control circuit board5controls the light source assembly3to emit pulsed light that transmits through the light-transmitting region102of the Peltier cooler1′, further transmits through the hair removal surface of the transparent crystal (or transparent), and burns hairs on the skin in contact with the transparent crystal (or transparent) working surface.

The Peltier cooler1′is connected with the heat dissipation assembly2, and heat from the Peltier cooler is transported to the heat dissipation assembly from the hot side12to dissipate heat. The heat dissipation assembly2includes heat pipes21and a heatsink23connected to the heat pipes21.

Other structure of the hair removal device as shown inFIGS.27-28in this embodiment is the same as the hair removal device in the first embodiment, or the same as the hair removal device in the second embodiment, or the same as the existing hair removal device, which will not be repeated herein, but the disclosure of which are incorporated by reference herein.

In some embodiments, at least two sensors9are installed in the head of the hair removal device1000to detect whether the transparent crystal working surface is completely or almost completely covered by skin so as to turn on/off the light source. Wherein, the two sensors9are installed at the diagonal or close to the diagonal of the edge of the transparent crystal surface10. The sensor9is connected with the control circuit board5.

In the description of the present invention, it should be understood that the terms “length”, “width”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical The orientations or positional relationships indicated by “straight”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but does not express or imply that the device or member referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

Although the embodiment of the present invention has been shown and described, for those of ordinary skill in the art, it can be understood that various changes can be made to this embodiment without departing from the principle and spirit of the invention, Modifications, replacements and variations shall all belong to the scope of the present invention; the protection scope of the present invention is defined by the appended claims and their equivalent scope.