CN201463150U - Natural cooling air-cooled coolant set - Google Patents
Natural cooling air-cooled coolant set Download PDFInfo
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- CN201463150U CN201463150U CN2009201064077U CN200920106407U CN201463150U CN 201463150 U CN201463150 U CN 201463150U CN 2009201064077 U CN2009201064077 U CN 2009201064077U CN 200920106407 U CN200920106407 U CN 200920106407U CN 201463150 U CN201463150 U CN 201463150U
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Abstract
The utility model discloses a natural cooling air-cooled coolant set, comprising an evaporator, a compressor, a condenser, an expansion valve, a three-way control valve, a radiator, a connection pipe, a cooler and a by-pass pipe, wherein, the radiator is connected with the connection pipe in sequence; the cooler is in parallel connection with the by-pass pipe; the evaporator comprises a compression refrigerating heat transfer flow and a natural cooling heat transfer flow; the outlet of the compression refrigerating heat transfer flow is connected with the compressor; the inlet thereof is connected with the expansion valve; the outlet of the natural cooling heat transfer flow is connected with the inlet of the radiator, and the inlet thereof is connected with the cooler and the by-pass pipe which are connected in parallel to form the loop of the natural cooling air-cooled coolant part; a heat transferring media is arranged in the loop of the natural cooling air-cooled coolant part; and three interfaces of the three-way control valve are respectively connected with the cooler, the by-pass pipe and the connection pipe, or are respectively connected with the inlet, the cooler and the by-pass valve of the natural cooling heat transfer flow. The utility model can fully utilize outdoor low temperature for refrigerating when the temperature is low, thus saving energy source.
Description
Technical field
The utility model relates to a kind of air-conditioning equipment, is specifically related to a kind of natural cooling air refrigerant unit.
Background technology
Develop rapidly along with informationization technology; the modern electronic equipment machine room is more prevalent; these electronic equipment machine rooms comprise communication center, IDC data center, computer center, electric power protection chamber and frequency converter chamber etc., arrange a large amount of intensive electronic equipments in the machine room, and caloric value is very big.And the electronic devices and components steady operation has very strict requirement to building environment, need round-the-clock maintenance constant temperature and humidity, be the temperature of electronic devices and components working environment and relative humidity require to be controlled in positive and negative 1 degree centigrade and positive and negative 5% within, with life-span and the reliability that improves electronic equipment greatly.
The large scale electronic equipment machine room mainly adopts air source cooling refrigeration equipment as large-scale refrigeration station, and cold water (or refrigerant) is provided the whole year; Machine room adopts air conditioning terminal in the electronic equipment, utilizes cold water (or refrigerant) that room air is regulated, constant temperature and humidity in the holding chamber.
But conventional air source cooling refrigeration air-conditioning equipment adopts the compression refrigeration mode, when outdoor environment temperature is lower than indoor temperature, still needs compressor operating, consumes energy.
In order to utilize outdoor low temperature, the air-conditioning system that has also increases an employing ethylene glycol solution on conventional air conditioner in machine room be the heat-exchanger rig of heat-transfer working medium, utilizes the winter low temperature environment that computer room is dispelled the heat.But still there is the antifreeze problem under the cryogenic conditions in ethylene glycol solution, and ethylene glycol solution is corrosive to metal, and heat transfer efficiency is low simultaneously.
The utility model content
The technical problems to be solved in the utility model provides a kind of natural cooling air refrigerant unit, can make full use of outdoor cryogenic refrigeration when temperature is low, thereby saves the energy.
The utility model provides a kind of natural cooling air refrigerant unit, comprises evaporimeter, the compressor, condenser and the expansion valve that link to each other successively; It is characterized in that, also comprise:
Cooler, tube connector, bypass pipe, three-way control valve and radiator;
Described evaporimeter comprises compression refrigeration heat exchange process and natural cooling heat transferring flow process at least; Isolate mutually between described two heat exchange processes, in described evaporimeter, realize heat exchange;
Described compression refrigeration heat exchange process outlet links to each other with compressor, and import links to each other with expansion valve;
Described cooler is in parallel with described bypass pipe; Described radiator, tube connector, cooler in parallel link to each other successively with bypass pipe, and the outlet of described natural cooling heat transferring flow process links to each other with the import of radiator, and import links to each other with bypass pipe with the cooler of parallel connection, constitute the loop of nature cooling refrigerant part; Naturally be filled with heat-transfer working medium in the loop of cooling refrigerant part;
Three interfaces of described three-way control valve link to each other with cooler, bypass pipe and tube connector respectively, or link to each other with import, cooler and the bypass pipe of described natural cooling heat transferring flow process respectively, distribute the flow of described heat-transfer working medium between cooler and bypass pipe.
Further, described natural cooling air refrigerant unit also comprises:
The fluid pump is arranged in the pipeline between the import of the outlet of described natural cooling heat transferring flow process and described radiator.
Further, described natural cooling air refrigerant unit also comprises: be used for the fluid pump according to the flow of the heat-transfer working medium of the demand of indoor temperature being regulated nature cooling refrigerant loop partly.
Further, described radiator comprises first heat exchange process and second heat exchange process; The described heat-transfer working medium of operation in described first heat exchange process, import links to each other with the outlet of described natural cooling heat transferring flow process, and outlet links to each other with described tube connector; Move refrigerating medium in described second heat exchange process; Isolate mutually between described first, second heat exchange process, in described radiator, realize heat exchange.
Further, described natural cooling air refrigerant unit also comprises: be used for regulating the controller of a described three-way control valve conducting bypass pipe when the residing environment temperature of cooler is greater than or equal to cooler inlet heat-transfer working medium temperature.
Further, described natural cooling air refrigerant unit also comprises: be used for being lower than cooler inlet heat-transfer working medium temperature when the residing environment temperature of cooler, and when being greater than or equal to a default temperature threshold, regulate the controller of a described three-way control valve conducting cooler.
Further, described natural cooling air refrigerant unit also comprises: be used for regulating described three-way control valve distributes the flow of described heat-transfer working medium between cooler and bypass pipe controller according to the residing environment temperature of cooler when the residing environment temperature of cooler is less than or equal to a default temperature threshold.
Further, described natural cooling air refrigerant unit also comprises:
Temperature sensor, and a controller that is used for according to the described three-way control valve of the detected adjustment of temperature sensor.
Further, described natural cooling air refrigerant unit also comprises: regulate three-way control valve only with the bypass pipe conducting when the environment temperature of cooler is greater than or equal to the temperature of the heat-transfer working medium in the described return-air tube connector, when the environment temperature of cooler is lower than the temperature of the heat-transfer working medium in the described return-air tube connector and be higher than a default temperature threshold, regulate three-way control valve only with the cooler conducting, when being lower than described temperature threshold, the environment temperature of cooler regulates described three-way control valve distributes described heat-transfer working medium between cooler and bypass pipe flow according to the residing environment temperature of cooler, when the environment temperature of cooler equals described temperature threshold, regulate described three-way control valve and only regulate described three-way control valve distributes the flow of heat-transfer working medium between cooler and bypass pipe controller with the cooler conducting or according to the residing environment temperature of cooler.
Further, when the residing environment temperature of cooler was less than or equal to a default temperature threshold, compressor quit work.
The utility model is to increase the nature cooling system on the air-conditioning equipment of original employing compressor cooling, when outdoor environment temperature is lower than the air conditioning area temperature, start the nature cooling system, utilize natural environment to indoor refrigeration, indoor heat is delivered in the outside atmosphere environment by heat-transfer working medium, therefore, the utlity model has higher energy saving.The utility model be particularly useful for round-the-clock need to freeze and the environment of the full vaporization refrigeration of needs in, such as high-accuracy environment such as computer floor, programme-controlled exchange machine room, satellite mobile station, large medical equipment chamber, laboratory, test cabinet, precision electronic device workshops, the environment that every indexs such as satisfied humidity to air, humidity, cleanliness factor, air-flow distribution have high requirements.The utility model has reduced the running time of cold season compressor of air conditioner simultaneously, and then has prolonged the service life of long compression refrigeration air-conditioning equipment, also can avoid the cold-starting of compressor and the fault that may exist; In addition, the utility model outdoor section is water not, therefore need not consider antifreeze.
Description of drawings
Fig. 1 is the structure principle chart of the natural cooling air refrigerant unit of the utility model embodiment one;
Fig. 2 is among the utility model embodiment one, the schematic diagram during conducting bypass pipe;
Fig. 3 is among the utility model embodiment one, the schematic diagram during conducting cooler.
Among the figure: 1. cooler, 2. condenser, 3. evaporimeter, the 4. compression refrigeration heat exchange process of evaporimeter, the 5. natural cooling heat transferring flow process of evaporimeter, 6. compressor, 7. tube connector, 8. fluid pump, 9. bypass pipe, 10. three-way control valve, 11. radiators.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the utility model and being implemented, but illustrated embodiment is not as to qualification of the present utility model.
Embodiment one, and natural cooling air refrigerant unit, this unit are a kind of air-conditioning units that liquid refrigerants is provided, and refrigerant is for temperature and humidity in other air-conditioning equipment conditioning chambers.
As shown in Figure 1, described natural cooling air refrigerant unit comprises compressor 6, condenser 2, expansion valve, evaporimeter 3, cooler 1, tube connector 7, bypass pipe 9, three-way control valve 10 and radiator 11; Wherein radiator 11 is arranged on indoorly, and remaining part is arranged on outdoor.
Wherein, described evaporimeter comprises two heat exchange processes, is respectively compression refrigeration heat exchange process 4 and natural cooling heat transferring flow process 5; Move freon in the described compression refrigeration heat exchange process 4, move heat-transfer working medium in the described natural cooling heat transferring flow process 5; Isolate mutually between described two heat exchange processes, in described evaporimeter 3, realize heat exchange.
Whole natural cooling air refrigerant unit is divided into two parts: the refrigerant part partly and is naturally cooled off in compression refrigeration; Described compression refrigeration part can but do not want to be limited to identical with existing compressor refrigeration system.
In the present embodiment, evaporimeter 3 is common component of two parts, adopts shell and tube exchanger or plate type heat exchanger; Radiator 11 is shell and tube exchanger or plate type heat exchanger.
In the present embodiment, described compression refrigeration partly comprises the compression refrigeration heat exchange process 4 of compressor 6, condenser 2, expansion valve and evaporimeter 3; Described condenser 2, expansion valve, compression refrigeration heat exchange process 4 and compressor 6 constitute the loop of compression refrigeration part, wherein, compressor 6, condenser 2 link to each other successively with expansion valve, and the import of described compression refrigeration heat exchange process 4 links to each other with expansion valve, and outlet links to each other with compressor 6; Be filled with the used working medium of general air-conditioning unit in the loop of compression refrigeration part, such as freon working medium, this freon working medium in this loop according to from compressor 6 to described condenser 2, again to expansion valve, again to described compression refrigeration heat exchange process 4, return the direction operation of compressor 6.
The described refrigerant of cooling naturally partly comprises natural cooling heat transferring flow process 5, three-way control valve 10 and the radiator 11 of cooler 1, tube connector 7, bypass pipe 9, evaporimeter 3; Described cooler 1 is in parallel with described bypass pipe 9; Described tube connector 7, cooler 1 and bypass pipe 9, natural cooling heat transferring flow process 5 and radiator 11 in parallel constitute nature cooling refrigerant loop partly, wherein, radiator 11, tube connector 7 and cooler 1 in parallel link to each other successively with bypass pipe 9, the outlet of nature cooling heat transferring flow process 5 links to each other with the import of radiator 11, and import links to each other with bypass pipe 9 with the cooler 1 of parallel connection; Naturally be filled with heat-transfer working medium in the loop of cooling refrigerant part, this heat-transfer working medium in this loop according to from described natural cooling heat transferring flow process 5 to radiator 11, again to cooler 1 and/or bypass pipe 9, return the direction operation of described natural cooling heat transferring flow process 5.
More than (except between radiator 11 and the tube connector 7 and between tube connector 7 and the cooler 1 and bypass pipe 9 in parallel) apart from each other or can't directly dock between each parts, can but be not limited to link to each other with tube connector.
In the present embodiment, three interfaces of described three-way control valve 10 link to each other with cooler 1, bypass pipe 9 and tube connector 7 respectively; In the practical application, three interfaces of described three-way control valve 10 also can link to each other with import, cooler 1 and the bypass pipe 9 of described natural cooling heat transferring flow process 5 respectively; In addition, do not get rid of yet and use two three-way control valves, one links to each other with import, cooler 1 and the bypass pipe 9 of natural cooling heat transferring flow process 5, another links to each other with tube connector 7, cooler 1 and bypass pipe 9. and described three-way control valve can distribute the flow of heat-transfer working medium between cooler and bypass pipe, just regulate the circulation ratio of described heat-transfer working medium in cooler and bypass pipe; In dispense flow rate, in other words when regulating described circulation ratio, three-way control valve 10 can be regulated continuously.
In the present embodiment, described heat-transfer working medium has the characteristic of similar freon, absorbs heat during vaporization and the latent heat of vaporization of emitting when condensing is conducted heat, so heat transfer efficiency is much higher than the method for utilizing sensible heat directly to conduct heat.
In the present embodiment, nature cooling air refrigerant unit also comprises fluid pump 8, being arranged on the described refrigerant flow path 5 of cooling naturally exports in the pipeline between radiator 11 imports, be used to improve the heat-transfer working medium flowing velocity, and can regulate the flow of working medium easily, to adapt to different Cooling and Heat Source temperature and to regulate heat output.When being heat-transfer working medium with freon, above-mentioned fluid pump 8 is magnetic drive pump preferably.
In the present embodiment, described radiator 11 can comprise two heat exchange processes, is respectively first heat exchange process and second heat exchange process; The described heat-transfer working medium of operation in described first heat exchange process, import links to each other with the outlet of described natural cooling heat transferring flow process 5, outlet links to each other with described tube connector 7, the loop that constitutes nature cooling refrigerant part jointly with described natural cooling heat transferring flow process 5, tube connector 7 and cooler 1 in parallel and bypass pipe; Refrigerating mediums such as operation water or ethylene glycol solution are used to produce cooling source use for indoor air conditioner end equipment in described second heat exchange process, because that radiator 11 is arranged in is indoor, thereby avoid water or the icing risk of ethylene glycol solution.Isolate mutually between described first, second heat exchange process, in described radiator 11, realize heat exchange.
Described three-way control valve 10 can manually be controlled or control automatically; When automatic control, described natural cooling air refrigerant unit can also comprise temperature sensor, and a controller that is used for according to the described three-way control valve 10 of the detected adjustment of temperature sensor.
When cooler 1 residing environment temperature is greater than or equal to cooler inlet heat-transfer working medium temperature (being the temperature of the heat-transfer working medium in the tube connector 7), adopt conventional compression refrigeration principle refrigeration, starting compression refrigeration partly works, 10 of three-way control valves are with bypass pipe 9 conductings, distribute the flow of described heat-transfer working medium just for cooler 1, give bypass pipe 9 with all assignment of traffic of heat-transfer working medium, the equivalent schematic of this moment as shown in Figure 2; The cold that the compression refrigeration part is produced is carried by freon, freon is by the compression refrigeration heat exchange process 4 in the evaporimeter 3 time, cold is delivered to heat-transfer working medium in the nature cooling heat transferring flow process 5, heat-transfer working medium is cooled to liquid state by gaseous state, liquid heat-transfer working medium is transported in the indoor radiator 11 by fluid pump 8, in radiator 11, heat-transfer working medium absorbs the heat vaporization, the heat-transfer working medium of vaporization turns back in the natural cooling heat transferring flow process 5 in the evaporimeter, the cold that is partly produced by compression refrigeration cools off, form circulation, conduct indoor heat; If radiator 11 comprises two heat exchange processes, then in radiator 11, heat-transfer working medium is to absorb the heat of refrigerating medium in second heat exchange process and vaporize, and makes refrigerating medium obtain cooling.
When cooler 1 residing environment temperature is lower than cooler inlet heat-transfer working medium temperature (being the temperature of the heat-transfer working medium in the tube connector 7), and when being higher than a default temperature threshold, nature cooling air refrigerant unit starting cools off refrigerant naturally and partly works, 10 conducting coolers 1 of three-way control valve, distribute the flow of described heat-transfer working medium just for bypass pipe 9, give cooler 1 with all assignment of traffic of heat-transfer working medium, the equivalent schematic of this moment as shown in Figure 3; When flowing through cooler 1 through the heat-transfer working medium of radiator 11 back vaporizations, in cooler 1, tentatively lowered the temperature by Cryogenic air, being compressed refrigeration heat exchange process 4 then in evaporimeter 3 further lowers the temperature, be condensed into liquid, the heat-transfer working medium of liquid is transported in the indoor radiator 11 by fluid pump 8, heat-transfer working medium enters cooler 1 after absorbing the heat vaporization again in radiator 11, form circulation, conduct indoor heat. as can be seen, the environment temperature of cooler 1 is low more, the amplitude that described heat-transfer working medium is lowered the temperature in cooler 1 is big more, even might directly liquefy in cooler 1; And the heat-transfer working medium temperature that enters the natural cooling heat transferring flow process 5 in the evaporimeter 3 is low more, and the cold that needs compression refrigeration heat exchange process 4 to provide is just few more, and compression refrigeration part desired power is just low more, even can stop refrigeration; Therefore, decline along with outdoor temperature, the load of compression refrigeration part will correspondingly descend, even drop to 0, thereby can make full use of natural cooling source, and if the saving energy. radiator 11 comprises two heat exchange processes, then in radiator 11, heat-transfer working medium is to absorb the heat of refrigerating medium in second heat exchange process and vaporize, and makes refrigerating medium obtain cooling.
When cooler 1 residing environment temperature is lower than a default temperature threshold, promptly be lower than cooler inlet heat-transfer working medium temperature (being the temperature of the heat-transfer working medium in the tube connector 7) more for a long time, three-way control valve 10 is with cooler 1 and all conductings of bypass pipe 9, and between cooler 1 and bypass pipe 9, distribute the flow of heat-transfer working medium according to cooler 1 residing environment temperature, with the temperature that guarantees heat-transfer working medium in the temperature range that design needs, because the heat-transfer working medium through bypass pipe 9 almost is not cooled, like this with cooler 1 in the cooled heat-transfer working medium and heat, made indoor temperature too low with regard to being unlikely to cold; Can regulate three-way control valve continuously according to cooler 1 residing environment temperature, the cold more flow of then giving bypass pipe 9 is many more.Compression refrigeration this moment part can quit work, and relies on extraneous low-temperature receiver fully, thereby saves the energy.
If comprise described controller, when then described controller was greater than or equal to cooler inlet heat-transfer working medium temperature (being the temperature of the heat-transfer working medium tube connector 7 in) when the environment temperature of cooler, 10 of adjusting three-way control valves were with bypass pipe 9 conductings; When the environment temperature of cooler 1 is lower than cooler inlet heat-transfer working medium temperature (being the temperature of the heat-transfer working medium tube connector 7 in), and when being higher than a default temperature threshold, 10 of adjusting three-way control valves are with cooler 1 conducting; When the environment temperature of cooler 1 is lower than described temperature threshold, regulate described three-way control valve 10 distributes heat-transfer working medium between cooler 1 and bypass pipe 9 flow according to cooler 1 residing environment temperature.Described temperature threshold rule of thumb or test obtain; Situation when equaling this temperature threshold only can be set to cooler 1 conducting also can be set to regulate described three-way control valve 10 distributes heat-transfer working medium between cooler 1 and bypass pipe 9 flow according to the residing environment temperature of cooler.
In the present embodiment, fluid pump 8 is according to the flow of the heat-transfer working medium in the loop of the demand (such as the temperature controlling demand of the refrigerating medium that radiator 11 is flowed out) of indoor temperature being regulated nature cooling refrigerant part, can satisfy the needs that air conditioner end equipment is regulated indoor temperature with the temperature that guarantees radiator (or wherein the outlet temperature of catalyst carrier).
The above embodiment is the preferred embodiment that proves absolutely that the utility model is lifted, and protection domain of the present utility model is not limited thereto.Being equal to that those skilled in the art are done on the utility model basis substitutes or conversion, all within protection domain of the present utility model.Protection domain of the present utility model is as the criterion with claims.
Claims (9)
1. a natural cooling air refrigerant unit comprises evaporimeter, the compressor, condenser and the expansion valve that link to each other successively; It is characterized in that, also comprise:
Cooler, tube connector, bypass pipe, three-way control valve and radiator;
Described evaporimeter comprises compression refrigeration heat exchange process and natural cooling heat transferring flow process at least; Isolate mutually between described two heat exchange processes, in described evaporimeter, realize heat exchange;
Described compression refrigeration heat exchange process outlet links to each other with compressor, and import links to each other with expansion valve;
Described cooler is in parallel with described bypass pipe; Described radiator, tube connector, cooler in parallel link to each other successively with bypass pipe, and the outlet of described natural cooling heat transferring flow process links to each other with the import of radiator, and import links to each other with bypass pipe with the cooler of parallel connection, constitute the loop of nature cooling refrigerant part; Naturally be filled with heat-transfer working medium in the loop of cooling refrigerant part;
Three interfaces of described three-way control valve link to each other with cooler, bypass pipe and tube connector respectively, or link to each other with import, cooler and the bypass pipe of described natural cooling heat transferring flow process respectively, distribute the flow of described heat-transfer working medium between cooler and bypass pipe.
2. natural cooling air refrigerant unit as claimed in claim 1 is characterized in that, also comprises:
The fluid pump is arranged in the pipeline between the import of the outlet of described natural cooling heat transferring flow process and described radiator.
3. natural cooling air refrigerant unit as claimed in claim 1 is characterized in that, also comprises:
Be used for fluid pump according to the flow of the heat-transfer working medium of the demand of indoor temperature being regulated nature cooling refrigerant loop partly.
4. natural cooling air refrigerant unit as claimed in claim 1 is characterized in that:
Described radiator comprises first heat exchange process and second heat exchange process; The described heat-transfer working medium of operation in described first heat exchange process, import links to each other with the outlet of described natural cooling heat transferring flow process, and outlet links to each other with described tube connector; Move refrigerating medium in described second heat exchange process; Isolate mutually between described first, second heat exchange process, in described radiator, realize heat exchange.
5. natural cooling air refrigerant unit according to any one of claims 1 to 4, it is characterized in that, also comprise: be used for when the residing environment temperature of cooler is greater than or equal to cooler inlet heat-transfer working medium temperature, regulating the controller of a described three-way control valve conducting bypass pipe.
6. natural cooling air refrigerant unit according to any one of claims 1 to 4, it is characterized in that, also comprise: be used for being lower than cooler inlet heat-transfer working medium temperature when the residing environment temperature of cooler, and when being greater than or equal to a default temperature threshold, regulate the controller of a described three-way control valve conducting cooler.
7. natural cooling air refrigerant unit according to any one of claims 1 to 4, it is characterized in that, also comprise: be used for when the residing environment temperature of cooler is less than or equal to a default temperature threshold, regulating described three-way control valve distributes the flow of heat-transfer working medium between cooler and bypass pipe controller according to the residing environment temperature of cooler.
8. natural cooling air refrigerant unit according to any one of claims 1 to 4 is characterized in that, also comprises:
Temperature sensor, and a controller that is used for according to the described three-way control valve of the detected adjustment of temperature sensor.
9. natural cooling air refrigerant unit according to any one of claims 1 to 4 is characterized in that, also comprises:
Being used for environment temperature when cooler is greater than or equal to when cooler enters the mouth described heat-transfer working medium temperature and regulates three-way control valve only with the bypass pipe conducting, when the environment temperature of cooler is lower than enter the mouth described heat-transfer working medium temperature and regulate three-way control valve only with the cooler conducting when being higher than a default temperature threshold of cooler, when being lower than described temperature threshold, the environment temperature of cooler regulates described three-way control valve distributes heat-transfer working medium between cooler and bypass pipe flow according to the residing environment temperature of cooler, when the environment temperature of cooler equals described temperature threshold, regulate described three-way control valve and only regulate described three-way control valve distributes the flow of heat-transfer working medium between cooler and bypass pipe controller with the cooler conducting or according to the residing environment temperature of cooler.
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|---|---|---|---|
| CN2009201064077U CN201463150U (en) | 2009-03-20 | 2009-03-20 | Natural cooling air-cooled coolant set |
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| CN2009201064077U CN201463150U (en) | 2009-03-20 | 2009-03-20 | Natural cooling air-cooled coolant set |
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| CN105241104A (en) * | 2014-05-29 | 2016-01-13 | 重庆美的通用制冷设备有限公司 | Refrigeration system and air conditioner |
| CN104990296A (en) * | 2015-07-13 | 2015-10-21 | 重庆美的通用制冷设备有限公司 | Refrigerating system |
| WO2020140314A1 (en) * | 2019-01-04 | 2020-07-09 | 青岛海尔空调电子有限公司 | Refrigeration system |
| US11994318B2 (en) | 2019-01-04 | 2024-05-28 | Qingdao Haier Air-Conditioning Electronic Co., Ltd. | Refrigeration system |
| CN110715464A (en) * | 2019-10-29 | 2020-01-21 | 江苏金荣森制冷科技有限公司 | Air-cooled energy-saving industrial refrigerator |
| CN112051530A (en) * | 2020-08-18 | 2020-12-08 | 上海联影医疗科技股份有限公司 | Medical imaging apparatus system and cooling control method thereof |
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