CN213100468U - Laser beauty instrument and circulating liquid cooling heat dissipation system thereof - Google Patents
Laser beauty instrument and circulating liquid cooling heat dissipation system thereof Download PDFInfo
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- CN213100468U CN213100468U CN202020821834.XU CN202020821834U CN213100468U CN 213100468 U CN213100468 U CN 213100468U CN 202020821834 U CN202020821834 U CN 202020821834U CN 213100468 U CN213100468 U CN 213100468U
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Abstract
The utility model discloses a laser beauty instrument and circulation liquid cooling system thereof, circulation liquid cooling system include the liquid cold machine for the radiating first liquid cooling heat exchanger of laser generator and be used for the radiating second liquid cooling heat exchanger of laser light-emitting device, the first coolant liquid inlet and the first coolant liquid export of the first liquid cooling heat exchanger are connected respectively to the coolant liquid export and the backward flow liquid entry of the liquid cold machine, the second liquid cooling heat exchanger is installed in the treatment handle, the second liquid cooling heat exchanger includes the coolant liquid runner, and the coolant liquid runner is equipped with second coolant liquid import and second coolant liquid export, and the coolant liquid export and the backward flow liquid entry of the cold machine of second coolant liquid inlet and second coolant liquid export difference connection liquid. This circulation liquid cooling system assembles in laser beauty instrument, especially femto second laser beauty instrument, can ensure the radiating effect of laser generator and laser treatment handle simultaneously, effectively avoids the equipment trouble that equipment overheat arouses, can postpone equipment life.
Description
Technical Field
The utility model belongs to the technical field of laser beauty equipment, concretely relates to laser beauty instrument and circulation liquid cooling system thereof.
Background
The laser beauty instrument is a beauty device which applies laser technology to skin beauty. The laser beauty instrument commonly used at present mostly comprises a power control assembly, a laser generator and a laser treatment handle provided with a laser light emitting device. In order to avoid laser generator overheated when equipment uses, reduce equipment trouble, extension equipment life, most laser beauty instrument all sets up cooling system and has cooled off laser generator.
However, in the use process of the beauty instrument, the devices in the laser treatment handle, especially the laser emitting device, are also easy to generate higher heat, which causes equipment failure and affects the normal use of the equipment.
Disclosure of Invention
Not enough to prior art, the to-be-solved technical problem of the utility model is to provide laser beauty instrument and circulation liquid cooling system thereof, this circulation liquid cooling system assembles in laser beauty instrument, especially femto second laser beauty instrument, can ensure the radiating effect of laser generator and laser treatment handle simultaneously, effectively avoids the equipment trouble that equipment overheat arouses, can postpone equipment life.
In order to achieve the above object, the utility model discloses a technical scheme be:
a circulating liquid cooling heat dissipation system for a laser beauty instrument comprises a liquid cooling machine for providing cooling liquid, and a first liquid cooling heat exchanger for dissipating heat of a laser generator of the laser beauty instrument, wherein the first liquid cooling heat exchanger is installed on the laser generator, a cooling liquid outlet and a backflow liquid inlet of the liquid cooling machine are respectively connected with a first cooling liquid inlet and a first cooling liquid outlet of the first liquid cooling heat exchanger through liquid flow pipelines, the circulating liquid cooling heat dissipation system further comprises a second liquid cooling heat exchanger for dissipating heat of a laser light emitting device in a laser treatment handle, the second liquid cooling heat exchanger is installed in the laser treatment handle, the second liquid cooling heat exchanger is installed on the laser light emitting device to exchange heat with the laser light emitting device, the second liquid cooling heat exchanger comprises a cooling liquid flow channel capable of containing flowing cooling liquid, and the cooling liquid flow channel is provided with a second cooling liquid inlet and a second cooling liquid outlet, and the second cooling liquid inlet and the second cooling liquid outlet are respectively connected with the cooling liquid outlet and the reflux inlet of the liquid cooling machine through liquid flow pipelines.
Preferably, the circulating liquid cooling heat dissipation system further comprises a filtering assembly for filtering cooling liquid, a cooling liquid outlet of the liquid cooling machine is connected with a liquid inlet of the filtering assembly through a liquid flow pipeline, and a liquid outlet of the filtering assembly is respectively connected with the first cooling liquid inlet and the second cooling liquid inlet through liquid flow pipelines.
Preferably, a first flow regulating valve for regulating the flow rate of the liquid in the liquid flow pipeline is installed on the liquid flow pipeline connecting the liquid outlet of the filtering assembly and the first cooling liquid inlet, and a second flow regulating valve for regulating the flow rate of the liquid in the liquid flow pipeline is installed on the liquid flow pipeline connecting the liquid outlet of the filtering assembly and the second cooling liquid inlet.
Preferably, the first flow regulating valve and the second flow regulating valve are both solenoid valves, the circulating liquid cooling heat dissipation system further includes a flow controller for controlling the first flow regulating valve and the second flow regulating valve, and the flow controller is in signal connection with the first flow regulating valve and the second flow regulating valve.
Preferably, the second liquid-cooled heat exchanger comprises a second heat exchanger shell in which the cooling liquid flow channel is arranged, the second cooling liquid inlet and the second cooling liquid outlet are both arranged on the second heat exchanger shell, a heat exchange groove is arranged on the outer wall of the second heat exchanger shell, and the heat exchange groove covers the surface of the laser light emitting device and is attached to the surface of the laser light emitting device.
Preferably, the cooling liquid channel is a cooling liquid accommodating chamber or a cooling liquid pipeline which is arranged in a back-and-forth reciprocating mode; the liquid cooling machine is a water cooling machine for supplying cooling water, and the first liquid cooling heat exchanger is a water cooling plate arranged on the laser generator.
The utility model also discloses a laser beauty instrument, establish the laser treatment handle of laser light-emitting device in with including laser generator, laser generator passes through optical fiber connection the income light port of laser light-emitting device, laser beauty instrument still includes circulation liquid cooling system.
Preferably, second heat exchanger shell outer wall is equipped with the heat exchange groove, the laser treatment handle includes the handle casing, the handle casing comprises last half casing and lower half casing butt joint, lower half casing fixed mounting have the bearing in the support groove of laser light-emitting device lower surface, the heat exchange groove cover in laser light-emitting device upper surface, just the heat exchange groove with it constitutes the joint fixed to hold in the palm the groove butt joint the clamp structure of laser light-emitting device, the heat exchange groove with hold in the palm the adapting unit fixed connection through the split between the groove.
Preferably, the connecting part comprises an ear plate provided with a threaded through hole, a connecting block provided with a threaded blind hole and a fixing screw, the fixing screw is matched with the threaded through hole and the threaded blind hole, the threaded through hole and the threaded blind hole are arranged in a one-to-one correspondence manner, the ear plate is fixedly connected with the connecting block through the fixing screw, the ear plate is fixedly installed on the edge of the heat exchange groove, and the connecting block is fixedly installed on the edge of the support groove.
Preferably, the laser treatment handle comprises a handle shell, the second liquid cooling heat exchanger is arranged in the handle shell, a pipeline inlet and a laser outlet are formed in the rear end of the handle shell, an optical fiber connected with the light inlet port is connected with the rear end of the handle shell, and the two liquid flow pipelines respectively connected with the second cooling liquid inlet and the second cooling liquid outlet penetrate into the handle shell from the pipeline inlet.
Preferably, the laser light extraction device is a femtosecond laser light extraction device.
Preferably, the laser outlet is provided with a cosmetic galvanometer, and the handle shell is also internally provided with a connecting device for connecting the cosmetic galvanometer and the light outlet end of the laser light-emitting device.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect: the utility model provides a laser beauty instrument and circulation liquid cooling system thereof, this circulation liquid cooling system assemble in laser beauty instrument, especially femto second laser beauty instrument, can ensure the radiating effect of laser generator and laser treatment handle simultaneously, effectively avoid the equipment trouble that equipment overheat arouses, but delay equipment life.
Drawings
Fig. 1 is a schematic structural diagram of a circulating liquid-cooling heat dissipation system according to this embodiment;
FIG. 2 is a schematic structural view of the laser treatment handle of the present embodiment;
FIG. 3 is an exploded view of the laser treatment handpiece of the present embodiment;
FIG. 4 is a schematic structural diagram of a second liquid-cooled heat exchanger according to the present embodiment;
the direction of the arrows in FIG. 1 indicates the direction of coolant flow within the flow conduit;
in the above figure: 1-circulating liquid cooling heat dissipation system, 11-liquid cooler, 12-filtering component, 13-first liquid cooling heat exchanger, 14-second liquid cooling heat exchanger, 141-second heat exchanger shell, 142-second cooling liquid inlet, 143-second cooling liquid outlet, 144-ear plate, 145-threaded through hole, 146-heat exchange groove, 15-first flow regulating valve, 16-second flow regulating valve, 17-liquid flow pipeline, 2-laser treatment handle, 21-handle shell, 211-pipeline inlet, 212-upper half shell, 213-lower half shell, 214-laser outlet, 215-bracket, 216-threaded blind hole, 22-cosmetic galvanometer, 23-laser light-emitting device, 231-light inlet port and 24-connecting device.
Detailed Description
The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that in the description of the present invention, the terms "inside", "outside", "upper", "lower", "left", "right", "front", "rear", etc. indicate the positional relationship based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 4, a circulating liquid-cooled heat dissipation system 1 for a laser beauty instrument includes a liquid-cooled machine 11 for providing a cooling liquid, and a first liquid-cooled heat exchanger 13 for dissipating heat of a laser generator of the laser beauty instrument, the first liquid-cooled heat exchanger 13 is installed on the laser generator, a cooling liquid outlet and a reflux inlet of the liquid-cooled machine 11 are respectively connected with a first cooling liquid inlet and a first cooling liquid outlet of the first liquid-cooled heat exchanger 13 through a liquid flow pipe 17, the circulating liquid-cooled heat dissipation system 1 further includes a second liquid-cooled heat exchanger 14 for dissipating heat of a laser light emitting device 23 in a laser treatment handle 2, the second liquid-cooled heat exchanger 14 is installed in the laser treatment handle 2, the second liquid-cooled heat exchanger 14 is installed on the laser light emitting device 23 to exchange heat with the laser light emitting device 23, the second liquid-cooled heat exchanger 14 includes a cooling liquid flow passage capable of accommodating the flowing of the cooling liquid, the cooling liquid flow channel is provided with a second cooling liquid inlet 142 and a second cooling liquid outlet 143, and the second cooling liquid inlet 142 and the second cooling liquid outlet 143 are respectively connected with the cooling liquid outlet and the reflux inlet of the liquid cooling machine 11 through a liquid flow pipeline 17.
The utility model provides a laser beauty instrument, includes laser generator and establishes laser treatment handle 2 of laser light-emitting device 23 in with, laser generator passes through optical fiber connection the income light port 231 of laser light-emitting device 23, laser beauty instrument still includes circulation liquid cooling system 1.
The circulating liquid cooling system 1 of this embodiment not only sets up the first liquid cooling heat exchanger 13 that can realize the heat dissipation of laser generator, still is equipped with the second liquid cooling heat exchanger 14 that can realize the heat dissipation of laser treatment handle 2, and the main device that generates heat in the laser treatment handle 2 is laser light-emitting device 23, and second liquid cooling heat exchanger 14 is installed on the laser light-emitting device 23, can fully carry out the heat exchange with laser light-emitting device 23, ensure circulating liquid cooling system 1 to the radiating effect of laser treatment handle 2, this circulating liquid cooling system 1 assembles in the laser beauty instrument, especially femto second laser beauty instrument, can ensure laser generator and laser treatment handle 2's radiating effect simultaneously, effectively avoid the equipment trouble that equipment is overheated to arouse, can postpone equipment life.
Specifically, the circulating liquid cooling heat dissipation system 1 further comprises a filter assembly 12 for filtering the cooling liquid, the cooling liquid outlet of the liquid cooling machine 11 is connected with the liquid inlet of the filter assembly 12 through a liquid flow pipeline 17, and the liquid outlet of the filter assembly 12 is respectively connected with the first cooling liquid inlet and the second cooling liquid inlet 142 through the liquid flow pipeline 17. The filtering component can filter impurities in the water cooling liquid supplied by the liquid cooling machine 11 to the circulating liquid cooling heat dissipation system 1, so that the impurities are prevented from blocking a cooling liquid flow passage in the first liquid cooling heat exchanger 13 and the second liquid cooling heat exchanger 14, the cooling effect is ensured, and the service life of the circulating liquid cooling heat dissipation system 1 is prolonged.
In particular, the filter assembly 12 is configured as a filter cartridge.
Specifically, a first flow regulating valve 15 for regulating the flow rate of the liquid in the liquid flow pipeline 17 is installed on the liquid flow pipeline 17 connecting the liquid outlet of the filter assembly 12 and the first cooling liquid inlet, and a second flow regulating valve 16 for regulating the flow rate of the liquid in the liquid flow pipeline 17 is installed on the liquid flow pipeline 17 connecting the liquid outlet of the filter assembly 12 and the second cooling liquid inlet 142. The flow rate of the cooling liquid flowing into the first liquid cooling heat exchanger 13 and the second liquid cooling heat exchanger 14 can be adjusted through the first flow adjusting valve 15 and the second flow adjusting valve 16, so that the heat dissipation efficiency of the first liquid cooling heat exchanger 13 and the second liquid cooling heat exchanger 14 can be adjusted and controlled respectively, the temperature control of the laser generator and the laser treatment handle 2 is further realized respectively, and the heat dissipation effect of the equipment is ensured.
Specifically, the first flow regulating valve 15 and the second flow regulating valve 16 are both set to be electromagnetic valves, the circulating liquid cooling heat dissipation system 1 further includes a flow controller for controlling the first flow regulating valve 15 and the second flow regulating valve 16, and the flow controller is in signal connection with the first flow regulating valve 15 and the second flow regulating valve 16. The first flow regulating valve 15 and the second flow regulating valve 16 are both set to be electromagnetic valves which can be controlled by the flow controllers electrically, so that the accurate control of the flow rate of the cooling liquid in the first liquid cooling heat exchanger 13 and the second liquid cooling heat exchanger 14 can be realized more conveniently, and the heat dissipation effect of the first liquid cooling heat exchanger 13 and the second liquid cooling heat exchanger 14 can be controlled more conveniently.
Specifically, the second liquid-cooled heat exchanger 14 includes a second heat exchanger shell 141 in which the cooling liquid flow channel is arranged, the second cooling liquid inlet 142 and the second cooling liquid outlet 143 are both opened on the second heat exchanger shell 141, a heat exchange groove 146 is arranged on the outer wall of the second heat exchanger shell 141, and the heat exchange groove 146 covers the surface of the laser light emitting device 23 and is attached to the surface of the laser light emitting device. The arrangement of the heat exchange groove 146 can make the second heat exchanger shell 141 and the laser light emitting device 23 fully fit, and increase the contact area of the two to improve the heat exchange effect, thereby improving the heat dissipation effect of the second liquid cooling heat exchanger 14 on the laser treatment handle 2.
Specifically, the outer wall of the second heat exchanger housing 141 is provided with a heat exchange groove 146, the laser treatment handle 2 includes a handle housing 21, the handle housing 21 is formed by butting an upper half housing 212 and a lower half housing 213, the lower half housing 213 is fixedly provided with a bracket 215 supported on the lower surface of the laser light emitting device 23, the heat exchange groove 146 covers the upper surface of the laser light emitting device 23, the heat exchange groove 146 is butted with the bracket 215 to form a clamping connection for fixing the laser light emitting device 23, and the heat exchange groove 146 is fixedly connected with the bracket 215 through a detachable connecting component. The second heat exchanger shell 141 is provided with the heat exchange groove 146 which can be matched with the bracket 215 and is butted to form a hoop structure for fixing the laser light emitting device 23, so that the second liquid-cooled heat exchanger 14 not only can realize heat dissipation of the laser treatment handle, but also can realize fixation of the laser light emitting device 23.
Specifically, the cooling liquid channel is a cooling liquid accommodating chamber or a cooling liquid pipeline arranged in a folding and reciprocating manner. The cooling liquid flow channel is a cooling liquid containing cavity, and the cooling liquid flowing through the cooling liquid pipeline arranged in a folding and reciprocating mode can cool the laser treatment handle.
Specifically, the liquid cooling machine 1 is a water cooling machine for supplying cooling water.
Specifically, the first liquid cooling heat exchanger is arranged as a water cooling plate installed on the laser generator.
Specifically, the connecting component includes an ear plate 144 provided with a threaded through hole 145, a connecting block provided with a threaded blind hole 216, and a fixing screw, the fixing screw is matched with both the threaded through hole 145 and the threaded blind hole 216, the threaded through hole 145 and the threaded blind hole 216 are arranged in a one-to-one correspondence, the ear plate 144 is fixedly connected with the connecting block through the fixing screw, the ear plate 144 is fixedly installed at the edge of the heat exchanging groove 146, and the connecting block is fixedly installed at the edge of the bracket 215.
Specifically, the laser treatment handle 2 includes a handle housing 21, the second liquid-cooled heat exchanger 14 is disposed in the handle housing 21, a pipeline inlet 211 and a laser outlet 214 are disposed at the rear end of the handle housing 21, an optical fiber connected to the light inlet 231, and two liquid flow pipes 17 respectively connected to the second cooling liquid inlet 142 and the second cooling liquid outlet 143 penetrate into the handle housing 21 from the pipeline inlet 211.
Specifically, the laser light emitting device 23 is a femtosecond laser light emitting device.
Specifically, the laser outlet 214 is provided with a cosmetic galvanometer 22, and a connecting device 24 for connecting the cosmetic galvanometer 22 and the light emitting end of the laser light emitting device 23 is further arranged in the handle shell 21.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A circulating liquid cooling heat dissipation system is used for a laser beauty instrument and comprises a liquid cooling machine used for providing cooling liquid and a first liquid cooling heat exchanger used for heat dissipation of a laser generator of the laser beauty instrument, wherein the first liquid cooling heat exchanger is installed on the laser generator, a cooling liquid outlet and a backflow liquid inlet of the liquid cooling machine are respectively connected with a first cooling liquid inlet and a first cooling liquid outlet of the first liquid cooling heat exchanger through liquid flow pipelines, the circulating liquid cooling heat dissipation system is characterized by further comprising a second liquid cooling heat exchanger used for heat dissipation of a laser light emitting device in a laser treatment handle, the second liquid cooling heat exchanger is installed in the laser treatment handle, the second liquid cooling heat exchanger is installed on the laser light emitting device to exchange heat with the laser light emitting device, the second liquid cooling heat exchanger comprises a cooling liquid flow channel capable of containing flowing cooling liquid, and the cooling liquid flow channel is provided with a second cooling liquid inlet and a second cooling liquid outlet, and the second cooling liquid inlet and the second cooling liquid outlet are respectively connected with the cooling liquid outlet and the reflux inlet of the liquid cooling machine through liquid flow pipelines.
2. The circulating liquid-cooled heat dissipating system of claim 1, further comprising a filtering assembly for filtering the cooling liquid, wherein the cooling liquid outlet of the liquid cooler is connected to the liquid inlet of the filtering assembly through a liquid flow pipeline, and the liquid outlet of the filtering assembly is connected to the first cooling liquid inlet and the second cooling liquid inlet through liquid flow pipelines, respectively.
3. The circulating liquid-cooled heat dissipating system of claim 2, wherein a first flow regulating valve for regulating the flow of the liquid in the flow pipe is installed on the flow pipe connecting the liquid outlet of the filtering assembly and the first cooling liquid inlet, and a second flow regulating valve for regulating the flow of the liquid in the flow pipe is installed on the flow pipe connecting the liquid outlet of the filtering assembly and the second cooling liquid inlet.
4. The circulating liquid-cooled heat dissipating system of claim 3, wherein the first flow regulating valve and the second flow regulating valve are both solenoid valves, and further comprising a flow controller for controlling the first flow regulating valve and the second flow regulating valve, the flow controller being in signal communication with the first flow regulating valve and the second flow regulating valve.
5. The circulating liquid-cooled heat dissipating system of claim 1, wherein the second liquid-cooled heat exchanger comprises a second heat exchanger housing having the coolant flow channel therein, the second coolant inlet and the second coolant outlet are both disposed on the second heat exchanger housing, and a heat exchanging groove is disposed on an outer wall of the second heat exchanger housing, the heat exchanging groove is disposed on a surface of the laser light emitting device and attached thereto.
6. The circulating liquid-cooled heat dissipating system of claim 1, wherein the coolant flow channel is configured as a coolant receiving chamber or a return reciprocating coolant line; the liquid cooling machine is a water cooling machine for supplying cooling water, and the first liquid cooling heat exchanger is a water cooling plate arranged on the laser generator.
7. A laser beauty instrument comprises a laser generator and a laser treatment handle internally provided with a laser light emitting device, wherein the laser generator is connected with a light inlet port of the laser light emitting device through an optical fiber, and the laser beauty instrument is characterized by further comprising the circulating liquid cooling heat dissipation system as claimed in any one of claims 1 to 6.
8. The laser beauty instrument of claim 7, wherein the second liquid-cooled heat exchanger includes a second heat exchanger housing in which the coolant flow passage is provided, the second cooling liquid inlet and the second cooling liquid outlet are both arranged on the second heat exchanger shell, the outer wall of the second heat exchanger shell is provided with a heat exchange groove, the heat exchange groove covers the surface of the laser light-emitting device and is attached to the surface of the laser light-emitting device, the laser treatment handle comprises a handle shell, the handle shell is formed by butt joint of an upper half shell and a lower half shell, the lower half shell is fixedly provided with a bracket which is supported on the lower surface of the laser light-emitting device, the heat exchange groove covers the upper surface of the laser light-emitting device, and the heat exchange groove and the support groove are butted to form a clamp structure for clamping and fixing the laser light-emitting device, and the heat exchange groove and the support groove are fixedly connected through a detachable connecting part.
9. The laser beauty instrument of claim 8, wherein the connection member comprises an ear plate having a threaded through hole, a connection block having a threaded blind hole, and a fixing screw, the fixing screw is adapted to both the threaded through hole and the threaded blind hole, the threaded through hole and the threaded blind hole are disposed in a one-to-one correspondence, the ear plate and the connection block are fixedly connected by the fixing screw, the ear plate is fixedly mounted on the edge of the heat exchange groove, and the connection block is fixedly mounted on the edge of the bracket.
10. The laser beauty instrument of claim 7, wherein the laser treatment handle comprises a handle housing, the second liquid-cooled heat exchanger is disposed in the handle housing, a pipeline inlet and a laser outlet are provided at the rear end of the handle housing, an optical fiber connected to the light inlet port, and two liquid flow pipes respectively connected to the second cooling liquid inlet and the second cooling liquid outlet are inserted into the handle housing from the pipeline inlet; the laser light-emitting device is a femtosecond laser light-emitting device, the laser outlet is provided with a cosmetic vibrating mirror, and a connecting device for connecting the cosmetic vibrating mirror and the light-emitting end of the laser light-emitting device is further arranged in the handle shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020821834.XU CN213100468U (en) | 2020-05-15 | 2020-05-15 | Laser beauty instrument and circulating liquid cooling heat dissipation system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020821834.XU CN213100468U (en) | 2020-05-15 | 2020-05-15 | Laser beauty instrument and circulating liquid cooling heat dissipation system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213100468U true CN213100468U (en) | 2021-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020821834.XU Active CN213100468U (en) | 2020-05-15 | 2020-05-15 | Laser beauty instrument and circulating liquid cooling heat dissipation system thereof |
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| CN (1) | CN213100468U (en) |
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2020
- 2020-05-15 CN CN202020821834.XU patent/CN213100468U/en active Active
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