CN108076616B - Photovoltaic centrifuge system - Google Patents
Photovoltaic centrifuge system Download PDFInfo
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- CN108076616B CN108076616B CN201711450420.XA CN201711450420A CN108076616B CN 108076616 B CN108076616 B CN 108076616B CN 201711450420 A CN201711450420 A CN 201711450420A CN 108076616 B CN108076616 B CN 108076616B
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- photovoltaic
- heat
- frequency converter
- core body
- centrifuge system
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- 230000005494 condensation Effects 0.000 claims abstract description 34
- 238000009833 condensation Methods 0.000 claims abstract description 34
- 238000001704 evaporation Methods 0.000 claims abstract description 33
- 230000008020 evaporation Effects 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 239000003507 refrigerant Substances 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 239000010949 copper Substances 0.000 claims abstract description 15
- 239000006260 foam Substances 0.000 claims abstract description 11
- 230000017525 heat dissipation Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000005728 strengthening Methods 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20936—Liquid coolant with phase change
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0233—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Centrifugal Separators (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a photovoltaic centrifugal machine system which comprises a liquid absorption core body and a plurality of fins, wherein the liquid absorption core body is made of foam copper materials, an evaporation surface and a condensation surface are formed on the liquid absorption core body, all the fins are uniformly distributed on the condensation surface, and the evaporation surface is attached to a device to be cooled by a photovoltaic device. According to the photovoltaic centrifugal machine system, the heat-absorbing core body made of foam copper and the heat-transferring working medium in the accommodating cavity of the heat-absorbing core body are adopted, the heat-transferring working medium absorbs heat on the evaporation surface of the heat-absorbing core body and dissipates heat on the condensation surface, the frequency converter is cooled, the heat dissipation efficiency of the condensation surface can be increased by arranging the fan, the utilization rate of energy sources of the system can be increased by utilizing the outlet energy of the fan coil, and the photovoltaic centrifugal machine system can meet the use requirement of R410A refrigerant by adopting the structure of the photovoltaic cooling equipment, so that the system cost and the running cost are effectively reduced.
Description
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to a photovoltaic centrifugal machine system.
Background
The main heating module of the photovoltaic direct-driven variable-frequency centrifugal machine is a frequency converter (comprising a rectifying module and an inversion module), the main heating module is used for converting commercial power or photovoltaic power into electricity for a motor of the centrifugal machine, the frequency converter can generate heat in the conversion process, if the temperature is too high (higher than 60 ℃), the frequency converter and other components can be burnt out, and finally, a machine unit is stopped, and the conventional photovoltaic cooling equipment is cooled in the prior art: a cooling plate embedded with a U-shaped copper pipe is arranged at the bottom of the frequency converter, the U-shaped copper pipe is distributed on the cooling plate in a serpentine way, and a refrigerant flows in a U-shaped groove to directly absorb heat of the frequency converter for heat dissipation. This technique has the following disadvantages: 1. the temperature uniformity is poor. Because the refrigerant flows on the cold plate in a single way, the temperature uniformity cannot be realized, the temperature of the refrigerant inlet is lower, the temperature of the refrigerant outlet is higher, the refrigerant inlet is easy to supercool to cause condensation, the condensation water can cause short circuit and burn out problems, the refrigerant outlet is easy to cause overhigh temperature, the performance of the frequency converter is influenced, and even the burn out is caused. 2. The cold plate with a special structure is needed, and the cold plate has high cost, heavy weight and large volume; the copper pipe with the U-shaped section has low safety, the pressure in the copper pipe cannot be too high, and for reliability, only the high-temperature refrigerant R134A can be used, so that the refrigeration efficiency is low.
Disclosure of Invention
In order to solve the technical problems, the photovoltaic centrifugal system is high in heat dissipation efficiency and does not use a refrigerant.
The utility model provides a photovoltaic cooling device, includes the liquid suction core body and a plurality of fin, the liquid suction core body has the foam copper material to make, just be formed with evaporation surface and condensation surface on the liquid suction core body, all fin evenly distributed in on the condensation surface, evaporation surface with treat photovoltaic cooling device laminating setting, liquid suction core body middle part is formed with holds the chamber, it has the heat transfer working medium to hold the intracavity to fill, just the heat transfer working medium can hold the intracavity the evaporation surface with circulation flow between the condensation surface.
The accommodating cavity is in a vacuum state, and the volume of the heat transfer working medium is smaller than that of the accommodating cavity.
The heat transfer working medium is alumina nano fluid with mass concentration of 0.5%.
The accommodating cavity is in a vacuum state.
The cross section of the liquid suction core body is of a rectangular structure, the condensation surface is positioned on the upper surface of the rectangular structure, and the evaporation surface is positioned on the lower surface of the rectangular structure.
The photovoltaic cooling device further comprises a heat radiation fan, and the air outlet direction of the heat radiation fan faces the condensation surface.
All the fins are distributed on the condensation surface in a multi-row mode, gas channels are formed between two adjacent rows of fins, and the air outlet direction of the heat dissipation fan is the same as the direction of the gas channels.
The inside strengthening rib that is provided with of holding the chamber, the upper end of strengthening rib with hold the upper surface fixed setting in chamber, the lower extreme with hold the lower surface fixed setting in chamber, just the strengthening rib adopts foam copper material to make.
The utility model provides a photovoltaic centrifuge system, includes converter and foretell photovoltaic cooling arrangement, photovoltaic cooling arrangement's evaporation surface laminating set up in on the converter.
The area of the evaporation surface is larger than the area of the side surface, where the frequency converter is attached to the evaporation surface, of the side surface.
The liquid suction core body is fixedly arranged on the frequency converter through a fixing structure, and the evaporation surface is bonded with the frequency converter through heat conduction silica gel.
The photovoltaic centrifugal system further comprises a compressor, a condenser and a fan coil, wherein the compressor, the condenser and the fan coil are sequentially communicated to form a refrigerant circulation channel, and the air outlet direction of the fan coil is directed to the condensation surface.
The photovoltaic centrifuge system further comprises a frequency converter box body, the frequency converter and the photovoltaic cooling equipment are arranged inside the frequency converter box body, and the air outlet direction of the fan coil is directed to the frequency converter box body.
Refrigerant in the photovoltaic centrifugal system is R410A.
According to the photovoltaic centrifugal machine system, the heat-absorbing core body made of foam copper and the heat-transferring working medium in the accommodating cavity of the heat-absorbing core body are adopted, the heat-transferring working medium absorbs heat on the evaporation surface of the heat-absorbing core body and dissipates heat on the condensation surface, the frequency converter is cooled, the heat dissipation efficiency of the condensation surface can be increased by arranging the fan, the utilization rate of energy sources of the system can be increased by utilizing the outlet energy of the fan coil, and the photovoltaic centrifugal machine system can meet the use requirement of R410A refrigerant by adopting the structure of the photovoltaic cooling equipment, so that the system cost and the running cost are effectively reduced.
Drawings
Fig. 1 is a schematic structural diagram of a photovoltaic cooling device of a photovoltaic centrifuge system provided by the invention;
fig. 2 is a schematic structural diagram of a photovoltaic centrifuge system of the photovoltaic centrifuge system provided by the invention;
in the figure:
1. a wick; 2. a fin; 3. an evaporation surface; 4. a condensing surface; 5. a receiving chamber; 6. a heat radiation fan; 7. reinforcing ribs; 10. a frequency converter; 11. a compressor; 12. a condenser; 13. a fan coil.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the tooling for assembling a display assembly of the present invention is given with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The photovoltaic cooling device shown in fig. 1 comprises a liquid suction core 1 and a plurality of fins 2, wherein the liquid suction core 1 is made of foam copper material, the foam copper has extremely strong capillary force, an evaporation surface 3 and a condensation surface 4 are formed on the liquid suction core 1, all the fins 2 are uniformly distributed on the condensation surface 4, the evaporation surface 3 is attached to the photovoltaic cooling device to be subjected to heat absorption, a containing cavity 5 is formed in the middle of the liquid suction core 1, a heat transfer working medium is filled in the containing cavity 5, the heat transfer working medium can circularly flow between the evaporation surface 3 and the condensation surface 4 in the containing cavity 5, the heat transfer working medium absorbs heat at the evaporation surface 3 and evaporates into a gaseous state and moves above the containing cavity 5 and contacts with the condensation surface 4 for heat dissipation, the cooled gaseous state heat transfer working medium is condensed into a liquid state and flows back to the condensation surface 3 under the influence of gravity for heat absorption to form circulation, and all the fins 2 absorb heat at the condensation surface 4 continuously absorb heat and emit heat into surrounding space.
The accommodating cavity 5 is in a vacuum state, so that only gaseous and liquid heat transfer working media can be guaranteed in the accommodating cavity 5, the purity of the heat transfer working media is guaranteed, the evaporation rate of the heat transfer working media is increased through the vacuum degree, and the volume of the heat transfer working media is smaller than that of the accommodating cavity 5, so that the accommodating cavity 5 can accommodate the heat transfer working media with partial evaporation into the gaseous state.
The heat transfer working medium is alumina nano fluid with the mass concentration of 0.5%, and can effectively enter the liquid suction core body 1, so that the heat transfer efficiency is improved.
The cross section of the liquid suction core body 1 is of a rectangular structure, the condensation surface 4 is positioned on the upper surface of the rectangular structure, the evaporation surface 3 is positioned on the lower surface of the rectangular structure, so that the gaseous heat transfer working medium can move to the upper surface and the liquid heat transfer working medium can move to the lower surface under the influence of gravity and vacuum degree, and the purpose of circulation is achieved.
The photovoltaic cooling device further comprises a heat radiation fan 6, the air outlet direction of the heat radiation fan 6 faces the condensation surface 4, and the heat radiation rate of the condensation surface 4 and/or the fins 2 is increased by utilizing the air outlet of the heat radiation fan 6.
All fins 2 are distributed on the condensation surface 4 in a multi-row mode, gas channels are formed between two adjacent rows of fins 2, and the air outlet direction of the heat dissipation fan 6 is the same as the direction of the gas channels, so that the air outlet of the heat dissipation fan 6 can forcedly dissipate heat of the condensation surface 4 and/or the fins 2, and air flow disturbance can be increased without causing excessive wind resistance.
The inside strengthening rib 7 that is provided with of holding the chamber 5, the upper end of strengthening rib 7 with hold the upper surface fixed setting in chamber 5, the lower extreme with hold the lower surface fixed setting in chamber 5, just strengthening rib 7 adopts foam copper material to make, strengthening rib 7 plays promptly and carries out the drainage to liquid heat transfer working medium to the supporting role of the structural strength of imbibition core 1, also can utilize the capillary action of foam copper.
The photovoltaic centrifuge system shown in fig. 2 comprises a frequency converter 10 and the photovoltaic cooling equipment, wherein an evaporation surface 3 of the photovoltaic cooling equipment is attached to the frequency converter 10, and the evaporation surface 3 is used for absorbing heat of the frequency converter 10.
The area of the evaporation surface 3 is larger than the area of the side surface, where the frequency converter 10 is attached to the evaporation surface 3, and the largest possible area of the flat heat pipe is selected in combination with the actual space and other factors, so that the temperature uniformity of the flat heat pipe can be exerted to the greatest extent, and the heat dissipation performance is improved.
The liquid suction core body 1 is fixedly arranged on the frequency converter 10 through a fixing structure, the evaporation surface 3 is bonded with the frequency converter 10 through heat conduction silica gel, and the two structures are integrated, so that the heat dissipation reliability of the photovoltaic cooling equipment is guaranteed.
The photovoltaic centrifugal machine system further comprises a compressor 11, a condenser 12 and a fan coil 13, the compressor 11, the condenser 12 and the fan coil 13 are sequentially communicated to form a refrigerant circulation channel, the air outlet direction of the fan coil 13 is directed to the condensation surface 4, the air outlet of the fan coil 13 is utilized to perform secondary work, the energy consumption of the system is reduced, the fan coil 13 can be utilized to replace the cooling and dehumidifying functions of the original small evaporator, the refrigerant circulation system is simplified into two paths from the original three paths, and the refrigerant distribution and system control are optimized.
The photovoltaic centrifuge system further comprises a frequency converter box body, the frequency converter 10 and the photovoltaic cooling equipment are arranged inside the frequency converter box body, and the air outlet direction of the fan coil 13 points to the frequency converter box body, so that the air outlet of the fan coil 13 can cool and dehumidify the space of the frequency converter box body.
The refrigerant in the photovoltaic centrifugal system is R410A, so that the photovoltaic centrifugal system is more efficient than the conventional photovoltaic cooling equipment using R134A, and can adopt a smaller-power compressor 11, a smaller-size condenser 12 and an evaporator, so that the system cost and the running cost are reduced.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A photovoltaic centrifuge system, characterized by: the photovoltaic cooling device comprises a frequency converter (10) and photovoltaic cooling equipment, wherein an evaporation surface (3) of the photovoltaic cooling equipment is attached to the frequency converter (10), the photovoltaic cooling equipment comprises a liquid suction core body (1) and a plurality of fins (2), the liquid suction core body (1) is made of foam copper materials, the liquid suction core body (1) is provided with the evaporation surface (3) and a condensation surface (4), all the fins (2) are uniformly distributed on the condensation surface (4), the evaporation surface (3) is attached to the photovoltaic cooling equipment to be attached to the photovoltaic cooling equipment, a containing cavity (5) is formed in the middle of the liquid suction core body (1), a heat transfer working medium is filled in the containing cavity (5), and the heat transfer working medium can circularly flow between the evaporation surface (3) and the condensation surface (4). The photovoltaic centrifugal system further comprises a compressor (11), a condenser (12) and a fan coil (13), wherein the compressor (11), the condenser (12) and the fan coil (13) are sequentially communicated to form a refrigerant circulation channel, and the air outlet direction of the fan coil (13) is directed to the condensation surface (4); the photovoltaic centrifuge system further comprises a frequency converter box body, the frequency converter (10) and the photovoltaic cooling equipment are arranged inside the frequency converter box body, and the air outlet direction of the fan coil (13) is directed to the frequency converter box body.
2. The photovoltaic centrifuge system of claim 1, wherein: the accommodating cavity (5) is in a vacuum state, and the volume of the heat transfer working medium is smaller than that of the accommodating cavity (5).
3. The photovoltaic centrifuge system of claim 1, wherein: the heat transfer working medium is alumina nano fluid with mass concentration of 0.5%.
4. The photovoltaic centrifuge system of claim 1, wherein: the cross section of the liquid suction core body (1) is of a rectangular structure, the condensation surface (4) is positioned on the upper surface of the rectangular structure, and the evaporation surface (3) is positioned on the lower surface of the rectangular structure.
5. The photovoltaic centrifuge system of claim 1, wherein: the photovoltaic cooling device further comprises a heat radiation fan (6), and the air outlet direction of the heat radiation fan (6) faces the condensation surface (4).
6. The photovoltaic centrifuge system of claim 5, wherein: all fins (2) are distributed on the condensation surface (4) in a multi-row mode, gas channels are formed between two adjacent rows of fins (2), and the air outlet direction of the heat dissipation fan (6) is the same as the direction of the gas channels.
7. The photovoltaic centrifuge system of claim 1, wherein: the inside strengthening rib (7) that is provided with of holding chamber (5), the upper end of strengthening rib (7) with hold the upper surface fixed setting in chamber (5), the lower extreme with hold the lower surface fixed setting in chamber (5), just strengthening rib (7) adopt foam copper material to make.
8. The photovoltaic centrifuge system of claim 1, wherein: the area of the evaporation surface (3) is larger than the area of the side surface, where the frequency converter (10) is attached to the evaporation surface (3).
9. The photovoltaic centrifuge system of claim 1, wherein: the liquid suction core body (1) is fixedly arranged on the frequency converter (10) through a fixing structure, and the evaporation surface (3) is bonded with the frequency converter (10) through heat conduction silica gel.
10. The photovoltaic centrifuge system according to any of claims 1-9, characterized in that: refrigerant in the photovoltaic centrifugal system is R410A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450420.XA CN108076616B (en) | 2017-12-27 | 2017-12-27 | Photovoltaic centrifuge system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450420.XA CN108076616B (en) | 2017-12-27 | 2017-12-27 | Photovoltaic centrifuge system |
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| CN108076616A CN108076616A (en) | 2018-05-25 |
| CN108076616B true CN108076616B (en) | 2023-09-08 |
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| CN110230899A (en) * | 2019-06-17 | 2019-09-13 | 阳光电源股份有限公司 | Photovoltaic generating system and its radiator, heat dissipating method |
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| CN207948000U (en) * | 2017-12-27 | 2018-10-09 | 珠海格力电器股份有限公司 | Photovoltaic cooling device and photovoltaic centrifuge system |
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