CN219843554U - Photovoltaic power generation device based on radiation refrigeration - Google Patents
Photovoltaic power generation device based on radiation refrigeration Download PDFInfo
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- CN219843554U CN219843554U CN202320579597.4U CN202320579597U CN219843554U CN 219843554 U CN219843554 U CN 219843554U CN 202320579597 U CN202320579597 U CN 202320579597U CN 219843554 U CN219843554 U CN 219843554U
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- secondary refrigerant
- working medium
- refrigeration
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 80
- 238000010248 power generation Methods 0.000 title claims abstract description 63
- 230000005855 radiation Effects 0.000 title claims abstract description 57
- 239000003507 refrigerant Substances 0.000 claims abstract description 57
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 230000008859 change Effects 0.000 claims description 53
- 239000012071 phase Substances 0.000 claims description 36
- 239000002826 coolant Substances 0.000 claims description 28
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical group CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 12
- 239000007791 liquid phase Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 239000007790 solid phase Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims 2
- 238000001816 cooling Methods 0.000 abstract description 26
- 230000000694 effects Effects 0.000 abstract description 11
- 230000007306 turnover Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model relates to the technical field of radiation of photovoltaic power generation devices, and provides a photovoltaic power generation device based on radiation refrigeration, which comprises a working medium pump and a refrigeration power generation assembly, wherein the refrigeration power generation assembly comprises a radiation refrigeration coating, a heat conduction box, a secondary refrigerant box and a photovoltaic panel which are sequentially stacked; the radiation refrigeration coating is arranged on the outer surface of the heat conduction box; the secondary refrigerant box is used for containing secondary refrigerant, the secondary refrigerant box is communicated with the heat conducting box, both the secondary refrigerant box and the heat conducting box are communicated with the working medium pump, and the working medium pump is used for driving the secondary refrigerant to circulate between the secondary refrigerant box and the heat conducting box. According to the radiation refrigeration-based photovoltaic power generation device, the working medium pump drives the secondary refrigerant to circulate between the heat conduction box and the secondary refrigerant box, and the radiation refrigeration coating radiates heat to enable the secondary refrigerant to accumulate cold energy, and the photovoltaic panel is cooled through the accumulated cold energy, so that the problems of poor cooling effect, high cooling cost and difficulty in large-scale use in the prior art are effectively solved.
Description
Technical Field
The utility model relates to the technical field of heat dissipation of photovoltaic power generation devices, in particular to a photovoltaic power generation device based on radiation refrigeration.
Background
In the process of converting solar radiation energy by the photovoltaic cell, less than 20% of energy is converted into electric energy, more than 80% of energy is converted into heat energy or lost into the environment, and in high-temperature weather, the heat energy can not be quickly dissipated, so that the photoelectric conversion efficiency of the solar cell is reduced, even a yellow spot of the solar cell panel is caused, the solar cell panel is damaged, and the service life of the solar cell panel is shortened by about 10%.
At present, the main stream cooling mode of the solar panel comprises two main modes of air cooling and water cooling, and the air cooling system has a simple structure but poor cooling effect; the water cooling mode mainly comprises water circulation cooling, surface cooling, liquid immersion cooling and the like, and the cooling effect is stronger than that of air cooling, but the problems of higher additional cost or difficult large-scale use and the like are all existed.
Disclosure of Invention
The utility model provides a photovoltaic power generation device based on radiation refrigeration, which is used for solving the problems of poor cooling effect, higher cooling cost and difficult large-scale use in the prior art.
The utility model provides a photovoltaic power generation device based on radiation refrigeration, which comprises a working medium pump and a refrigeration power generation assembly, wherein the refrigeration power generation assembly comprises a radiation refrigeration coating, a heat conduction box, a secondary refrigerant box and a photovoltaic panel which are sequentially stacked;
the radiation refrigeration coating is arranged on the outer surface of the heat conduction box;
the secondary refrigerant box is used for containing secondary refrigerant, the secondary refrigerant box is communicated with the heat conducting box, the secondary refrigerant box and the heat conducting box are both communicated with the working medium pump, and the working medium pump is used for driving the secondary refrigerant to circularly flow between the secondary refrigerant box and the heat conducting box.
According to the radiation refrigeration-based photovoltaic power generation device provided by the utility model, the refrigeration power generation assembly further comprises a phase change working medium layer, wherein the phase change working medium layer is arranged between the secondary refrigerant box and the photovoltaic panel, the phase change working medium layer is connected with the secondary refrigerant box and the photovoltaic panel, and the phase change working medium layer is used for absorbing heat at a phase change temperature.
According to the radiation refrigeration-based photovoltaic power generation device provided by the utility model, the radiation refrigeration-based photovoltaic power generation device further comprises a turnover assembly, wherein the turnover assembly is connected with the refrigeration power generation assembly and is used for driving the refrigeration power generation assembly to turn over so as to enable the refrigeration power generation assembly to be switched between a first state and a second state;
in the first state, the photovoltaic panel is configured to face the ground; in the second state, the photovoltaic panel is configured to face away from the ground.
According to the photovoltaic power generation device based on radiation refrigeration, the thermal conductivity of the side face of the secondary refrigerant box facing the phase change working medium layer is larger than that of the other side faces of the secondary refrigerant box.
According to the radiation refrigeration-based photovoltaic power generation device provided by the utility model, the phase change working medium layer comprises a solid-solid phase change working medium.
According to the radiation refrigeration-based photovoltaic power generation device provided by the utility model, the phase change working medium layer comprises a solid-liquid phase change working medium and a heat conduction shell, the solid-liquid phase change working medium is arranged in the heat conduction shell, and the heat conduction shell is connected with the refrigerating medium box and the photovoltaic panel and is adhered to the refrigerating medium box and the photovoltaic panel.
According to the radiation refrigeration-based photovoltaic power generation device provided by the utility model, the photovoltaic panel is electrically connected with the working medium pump.
According to the photovoltaic power generation device based on radiation refrigeration provided by the utility model, the secondary refrigerant is propylene glycol or ethylene glycol.
According to the photovoltaic power generation device based on radiation refrigeration, the working medium pump drives the secondary refrigerant to circulate between the heat conduction box and the secondary refrigerant box at night, and radiates heat through the radiation refrigeration coating on the outer surface of the heat conduction box, so that the secondary refrigerant continuously accumulates cold. During daytime, the photovoltaic panel is cooled by the accumulated cold of the secondary refrigerant. The cooling effect is better, and need not to match more extra accessories, and the working medium pump also need not to open for a long time, and the cooling cost is lower, has effectively solved among the prior art cooling effect poor, cooling cost is higher and be difficult to the problem of large-scale use.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a photovoltaic power generation device based on radiation refrigeration according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a partial structure of a photovoltaic power generation device based on radiation refrigeration according to an embodiment of the present utility model;
fig. 3 is a second schematic diagram of a partial structure of a photovoltaic power generation device based on radiation refrigeration according to an embodiment of the present utility model;
fig. 4 is a third schematic diagram of a partial structure of a photovoltaic power generation device based on radiation refrigeration according to an embodiment of the present utility model.
Reference numerals:
1. a working medium pump; 2. a refrigeration power generation assembly; 21. a radiation refrigeration coating; 22. a heat conduction box; 23. a coolant tank; 24. a photovoltaic panel; 25. a phase change working medium layer; 3. a support frame; 4. a frame; 5. and a connecting rod.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The radiation refrigeration-based photovoltaic power generation device of the present utility model is described below with reference to fig. 1 to 4.
The utility model relates to a photovoltaic power generation device based on radiation refrigeration, which comprises a working medium pump 1 and a refrigeration power generation assembly 2, wherein the refrigeration power generation assembly 2 comprises a radiation refrigeration coating 21, a heat conduction box 22, a secondary refrigerant box 23 and a photovoltaic panel 24 which are sequentially stacked; the radiation refrigeration coating 21 is arranged on the outer surface of the heat conduction box 22; the secondary refrigerant box 23 is used for containing secondary refrigerant, the secondary refrigerant box 23 is communicated with the heat conducting box 22, both the secondary refrigerant box 23 and the heat conducting box 22 are communicated with the working medium pump 1, and the working medium pump 1 is used for driving the secondary refrigerant to circularly flow between the secondary refrigerant box 23 and the heat conducting box 22.
Specifically, the coolant tank 23 and the heat conducting tank 22 both contain coolant, the coolant tank 23 and the heat conducting tank 22 are connected with the working medium pump 1 through pipelines, the working medium pump 1 drives the coolant to circulate between the coolant tank 23 and the heat conducting tank 22 at night, the radiation refrigeration coating 21 is arranged on the outer surface of the heat conducting tank 22, and when the coolant enters the heat conducting tank 22, radiation heat dissipation is carried out through the radiation refrigeration coating 21, so that the coolant accumulates cold energy, and the coolant after accumulating the cold energy flows back to the coolant tank 23 again.
During daytime, the photovoltaic panel 24 generates electricity and generates a large amount of waste heat, the photovoltaic panel 24 exchanges heat with the secondary refrigerant tank 23, and the photovoltaic panel 24 is cooled by the accumulated cold of the secondary refrigerant in the secondary refrigerant tank 23, so that the photoelectric conversion efficiency of the photovoltaic panel 24 is improved.
It should be noted that, during night, the working medium pump 1 may work intermittently or continuously according to actual needs; during daytime, the working medium pump 1 can intermittently work or not work according to actual needs.
According to the photovoltaic power generation device based on radiation refrigeration, the working medium pump 1 drives the secondary refrigerant to circulate between the heat conduction box 22 and the secondary refrigerant box 23 at night, and radiates heat through the radiation refrigeration coating 21 on the outer surface of the heat conduction box 22, so that the secondary refrigerant continuously accumulates cold. During daytime, the cooling capacity accumulated by the coolant cools the photovoltaic panel 24. The cooling effect is better, and need not to match more extra accessories, and working medium pump 1 also need not to open for a long time, and the cooling cost is lower, has effectively solved among the prior art cooling effect poor, cooling cost is higher and be difficult to the problem of large-scale use.
In some embodiments, the coolant is propylene glycol or ethylene glycol.
In particular, propylene glycol and ethylene glycol can be used as secondary coolant, and have antifreezing property, so that the influence on the normal flow caused by solidification at night can be avoided.
In some embodiments, as shown in fig. 1 to 4, the refrigeration and power generation assembly 2 further includes a phase change working substance layer 25, the phase change working substance layer 25 is disposed between the coolant tank 23 and the photovoltaic panel 24, and the phase change working substance layer 25 is connected to both the coolant tank 23 and the photovoltaic panel 24, and is configured to absorb heat at a phase change temperature.
Specifically, the phase change working medium can absorb a large amount of heat and keep the temperature unchanged after reaching the phase change temperature. The phase change working medium layer 25 is arranged between the secondary refrigerant box 23 and the photovoltaic panel 24, and the phase change working medium layer 25 is connected with the secondary refrigerant box 23 and the photovoltaic panel 24 and is attached to the secondary refrigerant box 23, so that the phase change working medium layer 25 absorbs waste heat generated by the photovoltaic panel 24 during daytime, the photovoltaic panel 24 is cooled, and then the phase change working medium layer 25 transfers heat to the secondary refrigerant, so that the phase change working medium layer 25 can continuously absorb the waste heat of the photovoltaic panel 24. The temperature of the phase change working medium layer 25 can be kept unchanged when the phase change working medium layer 25 absorbs heat, so that the temperature of the photovoltaic panel 24 can be kept in a proper range when the phase change working medium layer 25 absorbs heat, and the problem that the temperature of the photovoltaic panel 24 is greatly reduced in a short time due to a large temperature difference, so that the cold energy accumulated by the secondary refrigerant is rapidly consumed can be avoided.
In one particular embodiment, phase change working substance layer 25 comprises a solid-solid phase change working substance.
Specifically, the solid-solid phase change working medium is solid before and after phase change, so that the container is not needed to load the solid-solid phase change working medium, and the solid-solid phase change working medium can be directly attached to the secondary refrigerant box 23 and the photovoltaic panel 24 respectively, so that the heat conduction effect is better. The solid-solid phase change medium may be loaded in a container having a high thermal conductivity according to actual demands. The container with high heat conductivity can be a metal container such as iron, copper and the like.
In another embodiment, the phase change working substance layer 25 comprises a solid-liquid phase change working substance and a heat conductive housing, the solid-liquid phase change working substance being disposed inside the heat conductive housing, the heat conductive housing being connected to and affixed to both the coolant tank 23 and the photovoltaic panel 24.
Specifically, the solid-liquid phase change working medium has solid-liquid state conversion before and after phase change, so that the solid-liquid phase change working medium needs to be loaded through the heat conducting shell. Waste heat generated by the photovoltaic panels 24 is transferred to the thermally conductive housing and thus to the solid-liquid phase change working medium. The solid-liquid phase change working medium and the heat conducting shell can achieve a better heat absorption effect. The heat conducting shell can be made of metal materials such as iron, copper and the like.
In some embodiments, the thermal conductivity of the side of the coolant tank 23 facing the phase change working fluid layer 25 is greater than the thermal conductivity of the other sides of the coolant tank 23.
Specifically, the side surface of the coolant tank 23 facing the phase-change working medium layer 25 is made of a material with higher heat conductivity, such as copper, iron, and the like, so that better heat conduction efficiency is achieved, and the coolant can fully absorb the heat of the phase-change working medium layer 25. The other sides of the coolant tank 23 are made of a material having a relatively low thermal conductivity, such as hard plastic, glass, or the like, so as to mitigate the loss of coolant.
In some embodiments, photovoltaic panel 24 is electrically connected to working fluid pump 1.
Specifically, the photovoltaic panel 24 of the present utility model already contains photovoltaic power generation common accessories such as a battery, an inverter, and a controller. The photovoltaic panel 24 is connected to a controller, which is connected to a battery, so that the battery is charged, and the direct current of the battery can be converted into alternating current by an inverter and power the working medium pump 1. The working medium pump 1 is powered through the photovoltaic panel 24, an external power supply is not needed, and the working medium pump is convenient to use in an outdoor environment.
In some embodiments, the photovoltaic power generation device based on radiation refrigeration further comprises a turnover assembly, wherein the turnover assembly is connected with the refrigeration power generation assembly 2 and is used for driving the refrigeration power generation assembly 2 to turn over, so that the refrigeration power generation assembly 2 is switched between a first state and a second state; in the first state, the photovoltaic panel 24 is for facing the ground; in the second state, the photovoltaic panel 24 is used facing away from the ground.
Specifically, one of the heat transfer tanks 22 and the coolant tanks 23 is connected to the flipping assembly. At night, the overturning assembly drives the refrigeration and power generation assembly 2 to overturn to the first state, at this time, the photovoltaic panel 24 faces the ground, and the radiation refrigeration coating 21 faces the sky in the first state because the radiation refrigeration coating 21 is arranged on one side of the heat conduction box 22, which faces away from the photovoltaic panel 24. The radiation refrigeration technology refers to a process that an object on the earth surface emits infrared radiation to the universe through an atmospheric window wave band so as to realize self cooling. The radiation refrigeration technology uses sky as a cold source to cool, and the radiation refrigeration coating 21 has higher solar reflectance and middle infrared emissivity when facing the sky, so that in the first state, the radiation refrigeration coating 21 has better radiation heat dissipation effect, and the refrigerating medium can rapidly and fully accumulate cold.
During daytime, the overturning assembly drives the refrigeration and power generation assembly 2 to overturn to a second state, and the photovoltaic panel 24 faces the sky at the moment, so that the light energy can be fully utilized for power generation. The photovoltaic panel 24 can replace the secondary refrigerant box 23 and the heat conducting box 22 to shield light, the radiation refrigeration coating 21 faces the ground, and the loss of cooling capacity can be reduced.
In a specific embodiment, as shown in fig. 1, the photovoltaic power generation device based on radiation refrigeration further includes a support frame 3 and a frame 4, the frame 4 is sleeved on the outer sides of the heat conduction box 22, the secondary refrigerant box 23 and the photovoltaic panel 24, and the heat conduction box 22, the secondary refrigerant box 23 and the photovoltaic panel 24 are bound by the frame 4, so that the heat conduction box 22, the secondary refrigerant box 23 and the photovoltaic panel 24 are sequentially attached without fixed connection, and the disassembly and maintenance are facilitated. The frame 4 is rotatably connected with the support frame 3.
In the present embodiment, as shown in fig. 1 to 4, the turning assembly may be a link 5, and the link 5 is connected to one of the heat conduction box 22 and the coolant box 23, so that the refrigeration and power generation assembly 2 is turned by turning the link 5. The link 5 may be locked by any existing means so that the refrigeration and power generation assembly 2 can maintain the first state or the second state.
In this embodiment, the turnover assembly may also be a motor and a rotating shaft, the motor is disposed on the support frame 3, one end of the rotating shaft is in transmission connection with the motor, the other end is connected with one of the heat conduction box 22 and the coolant box 23, and the refrigeration and power generation assembly 2 is driven to turn over by the motor. The power required by the motor may also be provided by the photovoltaic panel 24.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (8)
1. The photovoltaic power generation device based on radiation refrigeration is characterized by comprising a working medium pump and a refrigeration power generation assembly, wherein the refrigeration power generation assembly comprises a radiation refrigeration coating, a heat conduction box, a refrigerating medium box and a photovoltaic panel which are sequentially stacked;
the radiation refrigeration coating is arranged on the outer surface of the heat conduction box;
the secondary refrigerant box is used for containing secondary refrigerant, the secondary refrigerant box is communicated with the heat conducting box, the secondary refrigerant box and the heat conducting box are both communicated with the working medium pump, and the working medium pump is used for driving the secondary refrigerant to circularly flow between the secondary refrigerant box and the heat conducting box.
2. The radiation refrigeration-based photovoltaic power generation device of claim 1, wherein the refrigeration power generation assembly further comprises a phase change working medium layer, the phase change working medium layer is arranged between the secondary refrigerant tank and the photovoltaic panel, and the phase change working medium layer is connected with both the secondary refrigerant tank and the photovoltaic panel, and the phase change working medium layer is used for absorbing heat at a phase change temperature.
3. The radiant refrigeration based photovoltaic power generation apparatus of claim 1, further comprising a flipping assembly coupled to the refrigeration power generation assembly, the flipping assembly configured to drive the refrigeration power generation assembly to flip, thereby switching the refrigeration power generation assembly between a first state and a second state;
in the first state, the photovoltaic panel is configured to face the ground; in the second state, the photovoltaic panel is configured to face away from the ground.
4. A radiation refrigeration based photovoltaic power generation device as defined in claim 2 wherein the thermal conductivity of the side of said coolant tank facing said phase change working fluid layer is greater than the thermal conductivity of the other sides of said coolant tank.
5. The radiation refrigeration-based photovoltaic power generation device of claim 2, wherein the phase change working substance layer comprises a solid-solid phase change working substance.
6. The radiation refrigeration-based photovoltaic power generation device according to claim 2, wherein the phase change working medium layer comprises a solid-liquid phase change working medium and a heat conduction shell, the solid-liquid phase change working medium is arranged inside the heat conduction shell, and the heat conduction shell is connected with the refrigerating agent box and the photovoltaic panel and is attached to the refrigerating agent box and the photovoltaic panel.
7. The radiation refrigeration-based photovoltaic power generation device of claim 1, wherein the photovoltaic panel is electrically connected to the working fluid pump.
8. A radiant refrigeration based photovoltaic power generation apparatus as claimed in any one of claims 1 to 7 wherein the coolant is propylene glycol or ethylene glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320579597.4U CN219843554U (en) | 2023-03-22 | 2023-03-22 | Photovoltaic power generation device based on radiation refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320579597.4U CN219843554U (en) | 2023-03-22 | 2023-03-22 | Photovoltaic power generation device based on radiation refrigeration |
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| Publication Number | Publication Date |
|---|---|
| CN219843554U true CN219843554U (en) | 2023-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320579597.4U Active CN219843554U (en) | 2023-03-22 | 2023-03-22 | Photovoltaic power generation device based on radiation refrigeration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219843554U (en) |
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2023
- 2023-03-22 CN CN202320579597.4U patent/CN219843554U/en active Active
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