CN213811214U - Solar seawater desalination and adsorption type refrigeration combined system - Google Patents
Solar seawater desalination and adsorption type refrigeration combined system Download PDFInfo
- Publication number
- CN213811214U CN213811214U CN202022022828.0U CN202022022828U CN213811214U CN 213811214 U CN213811214 U CN 213811214U CN 202022022828 U CN202022022828 U CN 202022022828U CN 213811214 U CN213811214 U CN 213811214U
- Authority
- CN
- China
- Prior art keywords
- tube
- sea water
- heat
- vapor
- refrigeration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000013535 sea water Substances 0.000 title claims abstract description 52
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 22
- 238000005057 refrigeration Methods 0.000 title claims abstract description 19
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 14
- 239000013505 freshwater Substances 0.000 claims abstract description 13
- 230000005494 condensation Effects 0.000 claims abstract description 10
- 238000009833 condensation Methods 0.000 claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 14
- 229910001369 Brass Inorganic materials 0.000 claims description 10
- 239000010951 brass Substances 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 9
- QOTAEASRCGCJDN-UHFFFAOYSA-N [C].CO Chemical class [C].CO QOTAEASRCGCJDN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000007710 freezing Methods 0.000 claims description 7
- 230000008014 freezing Effects 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 5
- 239000012267 brine Substances 0.000 claims description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims 3
- 238000002844 melting Methods 0.000 claims 3
- 239000012141 concentrate Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000000295 complement effect Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract 2
- 239000003463 adsorbent Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
-
- 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
- Y02E10/40—Solar thermal energy, e.g. solar towers
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The utility model aims at providing a solar energy sea water desalination and absorption formula refrigeration combined system, adopt the form that solar energy sea water desalination and absorption formula refrigerating system combined together, by thermal-arrest system, refrigerating system, sea water desalination constitutes, the ether solar energy is as the heat source, through dish formula spotlight thermal-arrest, the heating sea water produces high temperature steam, utilize steam latent heat heating adsorption bed, obtain the condensation fresh water when realizing refrigerated, the sea water after the refrigeration obtains fresh water once more through the refrigeration method, three system heat is complementary, make full use of sea water sensible heat, the latent heat of steam condensation, effectively improve solar energy utilization efficiency, process heat waste has been reduced, when obtaining the refrigeration benefit, improve the fresh water efficiency of producing.
Description
Technical Field
The utility model relates to a solar energy sea water desalination and absorption formula refrigeration combined system belongs to the medium temperature heat utilization field of solar energy.
Background
The disc condenser collects light and heat, the temperature of a focus can reach more than 200 ℃, seawater can be effectively and directly heated to boiling to generate a large amount of water vapor, solid adsorption type refrigeration is carried out, active carbon-methanol working medium pairs are adopted, the adsorption bed is heated by taking the condensation heat of high-temperature water vapor as a heat source, the adsorption bed enables a refrigerant to be desorbed after absorbing the condensation latent heat of the vapor, the refrigeration is realized through a plurality of links of heating, resolving, condensing, adsorbing, evaporating and the like, when the seawater is frozen, only pure water is separated out in the form of ice crystals, salt in the seawater is not separated out simultaneously, and the fresh water can be obtained after the ice crystals are melted.
Disclosure of Invention
The utility model aims at providing a solar energy sea water desalination and absorption formula refrigeration combined system, regard as the heat source with solar energy, through dish formula spotlight ware spotlight thermal-arrest, the heating sea water produces high temperature steam, utilize the latent heat of steam heating adsorption bed to carry out refrigeration cycle, obtain the condensation fresh water when realizing the refrigerated, sea water after the refrigeration obtains fresh water once more through the refrigeration method, three system energy is complementary, make full use of sea water sensible heat, latent heat of steam condensation, effectively improve solar energy utilization efficiency, process heat waste has been reduced, when obtaining the refrigeration benefit, improve the fresh water efficiency of producing, energy saving and environmental protection, no pollutant discharges.
The utility model discloses mainly by thermal-arrest system (A), refrigerating system (B), sea water desalination (C) is constituteed, wherein thermal-arrest system (A) includes dish condenser (23), receiver (24), delivery pipe (25), high temperature vapor pipeline (27), strong brine pipeline (28), refrigerating system (B) is including adsorption bed (1), vacuum valve (11), shell and tube condenser (12), choke valve (10), evaporating chamber (8), evaporimeter (9), sea water desalination (C) is including condensate water pipeline (13), booster pump (14), vacuum freezing room (15), shower nozzle (16), solid-liquid separator (17), strong sea water export 1 (18), strong sea water export 2 (19), melt ware (20), fresh water collecting box (21).
The utility model adopts the technical proposal that the sunlight with low energy flow density is concentrated by utilizing the light-gathering and heat-collecting principle of a disc condenser (23), the seawater in a receiver (24) is directly heated, the generated high-temperature water vapor enters an adsorption bed (1) through a high-temperature water vapor inlet (38), the high-temperature water vapor flows around a brass pipe (29) in a high-temperature water vapor diversion area (31) under the action of a baffle plate (34) and is fully contacted with the brass pipe (29) for heat exchange, the heat released after the high-temperature steam is condensed heats an active carbon-methanol working medium pair (32), the methanol liquid is heated and evaporated, the methanol liquid enters a methanol vapor channel (33) through a metal screen pipe (30), when the internal pressure of the adsorption bed (1) is increased to the saturation pressure corresponding to the condensation temperature, a vacuum valve (11) is opened, the high-temperature methanol vapor enters a shell-and tube condenser (12), cold seawater enters a water storage tank (3) from a water inlet (4), enters a shell-and-tube condenser (12) under the suction of a water pump (1) (6), high-temperature methanol steam is condensed into liquid, the temperature of the low-temperature seawater is increased after the low-temperature seawater absorbs the steam condensation heat, the low-temperature seawater returns to the water storage tank (3), after the seawater in a receiver (24) is reduced, a water pump (2) (26) pumps preheated seawater in the water storage tank (3) to the receiver (24) for supply, the methanol condensed into liquid flows into an evaporator (9) after being cooled and depressurized again through a throttle valve (10), after the methanol is completely analyzed, a vacuum valve (11) is closed, when no solar radiation exists at night, no high-temperature steam is generated, the temperature in an adsorption bed (1) is reduced, when the internal pressure of the adsorption bed is reduced to the saturation pressure corresponding to the evaporation temperature, the vacuum valve (11) is opened, the methanol liquid is rapidly evaporated due to sudden pressure reduction inside the evaporator (9), absorbing heat in an evaporation chamber (8) to generate a refrigeration effect, wherein the process is continued until the next morning, when a receiver (24) generates steam again, the next cycle of circulation is started, cold seawater enters the evaporation chamber through a valve 3 (7), the seawater is cooled to about zero degree, the seawater is pumped into a vacuum freezing chamber (15) by using a booster pump (14), high-pressure water absorbs heat after being atomized by a nozzle to rapidly reduce the temperature, most of the seawater is frozen to separate out ice crystals, a formed ice crystal and saline water mixture flows into a solid-liquid separator (17), the concentrated seawater in the receiver (24) flows into a melter (20) through a concentrated brine pipeline (28), the separated ice crystals are melted by waste heat, the high-temperature steam condensed into liquid also enters the solid-liquid separator (17) through a condensed water pipeline (13), and the ice crystals are melted while being further cooled, finally, the fresh water is gathered into a fresh water collecting box (21).
Drawings
FIG. 1 is a schematic diagram of a system configuration, in which: 1-adsorption bed, 2-valve 1, 3-water storage tank, 4-water inlet, 5-valve 2, 6-water pump 1, 7-valve 3, 8-evaporation chamber, 9-evaporator, 10-throttle valve, 11-vacuum valve, 12-shell-and-tube condenser, 13-condensed water pipeline, 14-booster water pump, 15-vacuum freezing chamber, 16-nozzle, 17-solid-liquid separator, 18-concentrated seawater outlet 1, 19-concentrated seawater outlet 2, 20-thawing device, 21-fresh water collecting box, 22-valve 4, 23-disc condenser, 24-receiver, 25-water supply pipe, 26-water pump 2, 27-high temperature water vapor pipeline, 28-concentrated seawater pipeline.
FIG. 2 is a cross-sectional view of the adsorbent bed (1), in which 29-brass tube, 30-metal sieve tube, 31-high temperature water vapor bypass region, 32-activated carbon-methanol working substance pair, 33-methanol vapor passage, 34-baffle plate, 35-adsorbent bed inner wall.
FIG. 3 is a longitudinal sectional view of the adsorbent bed (1), in which 32-activated carbon-methanol working medium pair, 33-methanol vapor channel, 34-baffle plate, 35-adsorbent bed inner wall, 36-methanol vapor outlet, 37-condensate outlet, and 38-high temperature water vapor inlet.
Detailed Description
Referring to fig. 1, the heat collecting system (a) mainly comprises a disc condenser (23), a receiver (24), a water supply pipe (25), a high-temperature steam pipeline (27) and a concentrated brine pipeline (28), wherein the receiver (24) is a cylindrical stainless steel barrel and is located at the focal position of the disc condenser (23), solar energy is used as a main heat source of the system, the disc condenser (23) collects sunlight with low energy flow density to directly heat seawater in the receiver (24), the refrigerating system (B) mainly comprises an adsorption bed (1), a vacuum valve (11), a shell-and-tube condenser (12), a throttle valve (10), an evaporation chamber (8) and an evaporator (9), referring to fig. 2 and fig. 3, an active carbon-methanol working medium pair (32) is filled in a gap between a brass tube (29) and a metal sieve tube (30), and the active carbon-methanol working medium (32) in the adsorption bed (1) is heated by heat released after the high-temperature steam is condensed, the diameter of active carbon particles is larger than the aperture of a metal sieve tube (30), the active carbon is prevented from entering a methanol steam channel (33), a baffle plate (34) is a round metal plate and is tightly attached to the inner wall (35) of an adsorption bed and the outer wall of a brass tube (29), a part of gap is reserved for high-temperature water vapor to flow back, one end of the brass tube (29) is welded with the inner wall (35) of the adsorption bed to ensure the sealing property in the tube, an opening is reserved at the other end for the methanol vapor to flow out, the flowing-out methanol vapor is separated from the high-temperature water vapor by the unnotched baffle plate at the opening, a straight-flow tube is arranged in a shell-and-tube condenser (12) and is provided with the baffle plate, the methanol vapor flows in the straight-flow tube, the cooling seawater flows around the tube, the seawater is preheated by utilizing the condensation latent heat of the methanol vapor, the methanol vapor condensed into liquid flows into an evaporator (9) to carry out evaporative refrigeration at night, seawater desalination system (C) includes condensate pipe way (13), booster pump (14), vacuum freezing chamber (15), shower nozzle (16), solid-liquid separator (17), concentrated seawater export 1 (18), concentrated seawater export 2 (19), melt ware (20), fresh water collecting box (21), install by the pipe connection between each part, each connecting tube parcel insulation material, prevent that the heat is lost, wherein vacuum freezing chamber maintains lower negative pressure environment, melt ware (20) for the screwed pipe, increase and ice crystal area of contact, hot sea water after receiver (24) concentration flows into melts ware (20), the ice crystal after will separating melts.
Claims (2)
1. The utility model provides a solar energy sea water desalination and absorption formula refrigeration combined system, characterized by includes heat collecting system (A), refrigerating system (B), sea water desalination (C), wherein heat collecting system (A) includes dish spotlight ware (23), receiver (24), delivery pipe (25), high temperature vapor pipeline (27), strong brine pipeline (28), refrigerating system (B) is including adsorption bed (1), vacuum valve (11), condenser (12), choke valve (10), evaporating chamber (8), evaporimeter (9), sea water desalination (C) is including condensate pipe way (13), booster pump (14), vacuum freezing room (15), shower nozzle (16), solid-liquid separator (17), strong sea water export 1 (18), strong sea water export (2) (19), melter (20), fresh water collecting box (21).
2. The combined system of solar seawater desalination and adsorption refrigeration as claimed in claim 1, wherein the receiver (24) is a cylindrical stainless steel barrel, which is located at the focal point of the disc-type condenser (23), the solar energy is used as the heat source of the system, the disc-type condenser (23) concentrates the sunlight with low energy flow density to directly heat the seawater in the receiver (24), the activated carbon-methanol working substance pair (32) is filled in the gap between the brass tube (29) and the metal sieve tube (30), the activated carbon-methanol working substance pair (32) in the adsorption bed (1) is heated by the heat released after the high-temperature water vapor is condensed, the diameter of the activated carbon particles is larger than the aperture of the metal sieve tube (30) to prevent the activated carbon from entering the methanol vapor channel (33), the baffle plate (34) is a circular metal plate, and is tightly attached to the inner wall (35) of the adsorption bed and the outer wall of the brass tube (29), the device is characterized in that a part of gap is reserved for high-temperature water vapor to flow back, one end of a brass tube (29) is welded with the inner wall (35) of an adsorption bed to ensure the sealing property in the tube, an opening is reserved at the other end of the brass tube for methanol vapor to flow out, the flowing-out methanol vapor and the high-temperature water vapor are separated by a non-gap baffle plate at the opening, a straight-flow tube is arranged in a shell-and-tube condenser (12) and is provided with the baffle plate, the methanol vapor flows in the straight-flow tube, cooling seawater flows around the tube, the seawater is preheated by using the latent heat of condensation of the methanol vapor, the methanol vapor condensed into liquid flows into an evaporator (9), evaporation refrigeration is carried out at night, a vacuum freezing chamber maintains a lower negative pressure environment, a melting device (20) is a threaded tube, the contact area with the melting device is increased, the hot seawater concentrated by a receiver (24) flows into the melting device (20), and ice crystals after separation are melted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022022828.0U CN213811214U (en) | 2020-09-16 | 2020-09-16 | Solar seawater desalination and adsorption type refrigeration combined system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022022828.0U CN213811214U (en) | 2020-09-16 | 2020-09-16 | Solar seawater desalination and adsorption type refrigeration combined system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213811214U true CN213811214U (en) | 2021-07-27 |
Family
ID=76953754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022022828.0U Expired - Fee Related CN213811214U (en) | 2020-09-16 | 2020-09-16 | Solar seawater desalination and adsorption type refrigeration combined system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213811214U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11618693B2 (en) | 2020-11-02 | 2023-04-04 | King Fahd University Of Petroleum And Minerals | Multimode system for cooling and desalination |
-
2020
- 2020-09-16 CN CN202022022828.0U patent/CN213811214U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11618693B2 (en) | 2020-11-02 | 2023-04-04 | King Fahd University Of Petroleum And Minerals | Multimode system for cooling and desalination |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101591042B (en) | Solar seawater desalination device | |
| WO2021169324A1 (en) | Energy-saving zero-emission low-temperature atmospheric pressure evaporation crystallization system and working method therefor | |
| CN102190340A (en) | Multistage double effect distillation seawater desalination technology with heating seawater by solar energy | |
| CN103011320B (en) | Small high-temperature multistage regenerative type vacuum glass tube solar seawater desalting device | |
| CN103172132B (en) | Seawater desalting device and method of off-grid type photovoltaic photo-thermal coupled heat pump | |
| CN213811214U (en) | Solar seawater desalination and adsorption type refrigeration combined system | |
| CN101838023A (en) | Solar distilling seawater desalinating and raw water purifying process | |
| CN103159275B (en) | Direct-expansion solar heat pump-based seawater desalination device and seawater desalination method therefor | |
| CN109179543B (en) | Efficient concentrating solar seawater desalination technology and system | |
| CN206514443U (en) | Energy supplying system based on low valley power storage | |
| CN2883340Y (en) | Enclosed solar and/or low temp heat source desalinizing unit | |
| CN108619914B (en) | Membrane distillation system using solar heat pump | |
| CN111426093B (en) | Heat pipe cold quantity transfer mechanism suitable for lithium bromide absorption type air water generator | |
| CN205245634U (en) | Solar energy adsorbs formula contact process prepares ice thick liquid device | |
| CN104613653A (en) | Composite heating device of separated heat pipe type solar heat pump | |
| CN211953318U (en) | Solar double-adsorption-bed reinforced returning-mass continuous circulation refrigeration system | |
| CN211514026U (en) | Air heating drying device with combination of secondary cooler and secondary heater | |
| CN110332727B (en) | Industrial waste heat driven adsorption type water purification and refrigeration system and application thereof | |
| CN107816821A (en) | Solar adsorption and absorption cascade refrigeration and heating system | |
| CN101561198A (en) | Cooling method by utilizing lithium bromide unit | |
| TWI303995B (en) | Absorption freezing method to separate pure water from sea water | |
| CN101532751A (en) | Built-in sorbent floating head type adsorbent bed refrigeration unit | |
| CN1128326C (en) | Integrated solar refrigerating-heating equipment | |
| CN108619915B (en) | Air source type heat pump solar membrane distillation composite system | |
| CN210374158U (en) | Solar adsorption type refrigerating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210727 |