CN203010777U - Dual-refrigeration-cycle energy-saving air conditioning unit - Google Patents
Dual-refrigeration-cycle energy-saving air conditioning unit Download PDFInfo
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- CN203010777U CN203010777U CN201220650420.0U CN201220650420U CN203010777U CN 203010777 U CN203010777 U CN 203010777U CN 201220650420 U CN201220650420 U CN 201220650420U CN 203010777 U CN203010777 U CN 203010777U
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- 238000004378 air conditioning Methods 0.000 title abstract description 11
- 239000003507 refrigerant Substances 0.000 claims abstract description 41
- 238000005057 refrigeration Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims description 28
- 239000012071 phase Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 abstract description 15
- 238000007906 compression Methods 0.000 abstract description 15
- 238000004891 communication Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses a dual-refrigeration-cycle energy-saving air conditioning unit, belonging to the technical field of air conditioning refrigeration, aiming at solving the problems of great power consumption in the existing compression refrigeration cycle mode and great difficulty in operation under the condition of extremely low outdoor temperature. The dual-refrigeration-cycle energy-saving air conditioning unit comprises an indoor unit, an outdoor unit and a refrigerant pump energy saving module. The outlet of the refrigerant pump energy saving module is communicated with the inlet of the indoor unit through a first pipeline. The outlet of the indoor unit is communicated with the inlet of the outdoor unit through a second pipeline. The outlet of the outdoor unit is communicated with the inlet of the refrigerant pump energy saving module through a third pipeline. The refrigerant pump energy saving module is arranged outdoors. The dual-refrigeration-cycle energy-saving air conditioning unit is applicable to environmental control of computer houses, communication houses and communication base stations in uncomfortable application places.
Description
Technical field
The utility model relates to the air-conditioning unit, particularly a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit.
Background technology
The energy cost that rises, and green the driving have caused very large energy-conservation demand.Data center or computer floor air-conditioning are the big power consumers, and available data center or computer floor air-conditioning need whole year operation compression refrigeration circulation pattern.at present, the air-conditioning of compression refrigeration circulation pattern is to adopt compressor refrigerant conveying gas, namely after the high-temperature high-pressure refrigerant liquid with certain degree of supercooling is through the throttling arrangement throttling, pressure is adiabatic decline rapidly, some flash gas produce, reduced the temperature of remaining liq, mixed low-temp low-pressure liquid/gas mix refrigerant enters evaporimeter, when low-temp low-pressure liquid/gas mix refrigerant evaporates in evaporimeter from indoor absorption heat and flash to low-temp low-pressure gas, the effect of compressor shortens the low-temperature low-pressure refrigerant vapour pressure into high pressure, high temperature refrigerant gas exactly, and be sent to condenser, high-temperature high-pressure refrigerant in condenser is toward outdoor heat extraction and be condensed into high temperature high pressure liquid, continuous and so forth, form continuous compression refrigeration circulation pattern.In the compression refrigeration circulation pattern, compressor need to raise the pressure of cold-producing medium more than 3 times, and power consumption is huge.In addition, during lower than uniform temperature, compression refrigeration circulation reliability reduces, and even can't normally start operation when outdoor temperature.
Summary of the invention
Problem to be solved in the utility model just is to provide a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit, and in the existing compression refrigeration circulation pattern of solution, power consumption is large, and moves hard problem under extremely low outdoor temperature condition.
In order to achieve the above object, the utility model adopts following technical scheme: a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit, formed by indoor units, outdoor unit and refrigerated medium pump energy-saving module, the outlet of described refrigerated medium pump energy-saving module is communicated with the entrance of indoor units by the first pipeline, the outlet of described indoor units is communicated with the entrance of outdoor unit by the second pipeline, the outlet of described outdoor unit is communicated with the entrance of refrigerated medium pump energy-saving module by the 3rd pipeline, and described refrigerated medium pump energy-saving module is located at outdoor.
Further, described refrigerated medium pump energy-saving module comprises refrigerated medium pump and reservoir, described cold-producing medium delivery side of pump and the first pipeline connection, have gas phase zone and liquid phase region in described reservoir, the entrance of described refrigerated medium pump is communicated with by the liquid phase region of refrigerant tubing and reservoir, described refrigerant tubing is provided with the first control valve, be provided with the refrigerated medium pump bypass pipe between described the first pipeline and refrigerant tubing, described refrigerated medium pump bypass pipe is provided with and makes cold-producing medium flow to the first check valve of the first pipeline from refrigerant tubing.
Further, described refrigerated medium pump is reverse circulation type canned motor pump, is provided with contrary circulation pipe between the gas phase zone of described reverse circulation type canned motor pump and reservoir and is communicated with.Adopt the reverse circulation type canned motor pump of cavitation-preventive, anti-leak, and by contrary circulation pipe the gas phase zone that is used for bearing lubrication, the refrigerant liquid that cooling and motor is cooling and is discharged to reservoir, keep the stable operation of refrigerated medium pump, prevented cavitation erosion, can avoid damaging refrigerated medium pump.
Further, connecting the refrigerated medium pump place and be connected part between refrigerated medium pump bypass pipe place and be provided with and make cold-producing medium flow to the second check valve of indoor units from the refrigerated medium pump energy-saving module on described the first pipeline.
further, described indoor units comprises evaporimeter and compressor, the entrance of described evaporimeter and the first pipeline connection, the outlet of described evaporimeter is communicated with the entrance of compressor by the 4th pipeline, the outlet of described compressor and the second pipeline connection, the indoor section of described the first pipeline is provided with expansion valve and the expansion valve bypass pipe in parallel with expansion valve, described expansion valve bypass pipe is provided with the second control valve, described the 4th pipeline is provided with the 3rd control valve, be provided with the compressor bypass pipe between part and the second pipeline between evaporimeter and the 3rd control valve on described the 4th pipeline, described compressor bypass pipe is provided with and makes cold-producing medium flow to the 3rd check valve of the second pipeline from the 4th pipeline.
Further, also be provided with gas-liquid separator on described the 4th pipeline on the part between the 3rd control valve and compressor.
Further, described gas-liquid separator is provided with heater.Starting compression refrigeration when guaranteeing to change according to the season does not have liquid hit phenomenon, avoids damaging compressor.
Further, the indoor section of described the first pipeline is provided with device for drying and filtering, and cold-producing medium first flows to the junction of the first pipeline and expansion valve bypass pipe again through device for drying and filtering.Guarantee the aridity of cold-producing medium, prevent from simultaneously existing in cold-producing medium impurity.
Further, be positioned on described the second pipeline and connect the compressor place and be connected compressor bypass pipe place and be provided with and make cold-producing medium flow to the 4th check valve of outdoor unit from indoor units.
Further, described outdoor unit comprises condenser, the entrance of described condenser and the second pipeline connection, and the outlet of described condenser is communicated with the gas phase zone of reservoir by the 3rd pipeline.
After adopting technique scheme, the utlity model has following advantage: can be in the winter time with the lower situation of two season of spring and autumn outdoor environment temperature under, turn off or reduce the operation of compressor of air conditioner, take full advantage of outdoor natural cooling source, come service data center or computer floor air-conditioning with pump kind of refrigeration cycle pattern, just can greatly save the energy.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is the structural representation of a kind of embodiment of the utility model.
The specific embodiment
Be illustrated in figure 1 as a kind of embodiment of the utility model, a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit, formed by indoor units A, outdoor B of Unit and refrigerated medium pump energy-saving module C, the outlet of described refrigerated medium pump energy-saving module is communicated with the entrance of indoor units by the first pipeline 11, the outlet of described indoor units is communicated with the entrance of outdoor unit by the second pipeline 12, the outlet of described outdoor unit is communicated with the entrance of refrigerated medium pump energy-saving module by the 3rd pipeline 13, and described refrigerated medium pump energy-saving module is located at outdoor.
Described refrigerated medium pump energy-saving module comprises refrigerated medium pump C1 and reservoir C2, described cold-producing medium delivery side of pump and the first pipeline connection, have gas phase zone C21 and liquid phase region C22 in described reservoir, the entrance of described refrigerated medium pump is communicated with by the liquid phase region of refrigerant tubing C11 and reservoir, and described refrigerant tubing is provided with the first control valve C12.Be provided with refrigerated medium pump bypass pipe C13 between described the first pipeline and refrigerant tubing, described refrigerated medium pump bypass pipe is provided with and makes cold-producing medium flow to the first check valve C14 of the first pipeline from refrigerant tubing.Preferably, described refrigerated medium pump is reverse circulation type canned motor pump, is provided with contrary circulation pipe C15 between the gas phase zone of described reverse circulation type canned motor pump and reservoir and is communicated with.Reverse circulation type canned motor pump is totally enclosed type, does not worry refrigrant leakage.
Described indoor units comprises evaporimeter A1 and compressor A2, the entrance of described evaporimeter and the first pipeline connection, the outlet of described evaporimeter is communicated with the entrance of compressor by the 4th pipeline 14, the outlet of described compressor and the second pipeline connection, the indoor section of described the first pipeline is provided with expansion valve A3 and the expansion valve bypass pipe A31 in parallel with expansion valve, described expansion valve bypass pipe is provided with the second control valve A32, and described the 4th pipeline is provided with the 3rd control valve A11.Be provided with compressor bypass pipe A21 between part and the second pipeline between evaporimeter and the 3rd control valve on described the 4th pipeline, described compressor bypass pipe is provided with and makes cold-producing medium flow to the 3rd check valve A22 of the second pipeline from the 4th pipeline.Also be provided with gas-liquid separator A4 on described the 4th pipeline on the part between the 3rd control valve and compressor.Described gas-liquid separator is provided with heater A41.
Described outdoor unit comprises condenser B1, the entrance of described condenser and the second pipeline connection, and the outlet of described condenser is communicated with the gas phase zone of reservoir by the 3rd pipeline.
In above-described embodiment, connecting the refrigerated medium pump place and be connected part between refrigerated medium pump bypass pipe place and be provided with and make cold-producing medium flow to the second check valve C16 of indoor units from the refrigerated medium pump energy-saving module on described the first pipeline.The indoor section of described the first pipeline is provided with device for drying and filtering A5, and cold-producing medium first flows to the junction of the first pipeline and expansion valve bypass pipe again through device for drying and filtering.Be positioned on described the second pipeline and connect the compressor place and be connected compressor bypass pipe place and be provided with and make cold-producing medium flow to the 4th check valve A23 of outdoor unit from indoor units.
In the utility model, compressor is used for shortening the low-temperature low-pressure refrigerant vapour pressure into high pressure, high temperature refrigerant gas.Refrigerated medium pump is be used to the resistance that overcomes refrigerant tubing, realizes flowing of cold-producing medium, and can be under high operating pressure steady operation and do not produce leakage, this pump adopts the reverse circulation type canned motor pump of cavitation-preventive, anti-leak.Condenser is used for the gaseous refrigerant heat extraction and is condensed into liquid.Evaporimeter is used for the liquid refrigerant heat absorption and flashes to liquid.Refrigerant flow control when expansion valve 11 is used for the compression refrigeration circulation pattern.Reservoir is used for storing a certain amount of cold-producing medium, guarantees that the refrigerated medium pump entrance is liquid, to prevent cavitation erosion and vent plug phenomenon.In addition, described the first control valve, the second control valve and the 3rd control valve preferably adopt magnetic valve, and expansion valve preferred electron expansion valve, heater are electric heater, and it is convenient to control, and is convenient to the air-conditioning unit and automatically moves.When the first check valve is used for preventing the refrigerated medium pump operation, cold-producing medium is from the liquid of the refrigerated medium pump outlet refrigerated medium pump entrance that flows backwards back.The high-temperature high-pressure refrigerant steam of discharging from compressor outlet when the 3rd check valve is used for preventing compressor operating returns to the suction port of compressor by the compressor bypass pipe and damages compressor.
The utility model is when pump kind of refrigeration cycle pattern, and refrigerated medium pump moves, and the first control valve is opened, and the 3rd control valve is closed, and with the 4th check valve acting in conjunction, compressor and refrigerated medium pump is kept apart, and pours compressor into to prevent cold-producing medium; When the compression refrigeration circulation pattern, compressor operating, the 3rd control valve is being opened, and the first control valve is closed, jointly refrigerated medium pump and compressor are kept apart with the second check valve, the high-temperature high-pressure refrigerant liquid effects when preventing compressor operating is damaged refrigerated medium pump on refrigerated medium pump.
Specific works principle of the present utility model is as follows.
The compression refrigeration circulation pattern is as follows:
During higher than 5 ℃, adopt the compression refrigeration circulation pattern when outdoor temperature.During work, at first close the second control valve, the first control valve and refrigerated medium pump, open the 3rd control valve, open compressor.compressor shortens the low-temperature low-pressure refrigerant vapour pressure into high pressure, high temperature refrigerant gas, and be sent to condenser, high-temperature high-pressure refrigerant in condenser is toward outdoor heat extraction and be condensed into high temperature high pressure liquid, and be stored in reservoir, again via the first check valve, the refrigerated medium pump bypass pipe, device for drying and filtering enters expansion valve, pressure descends rapidly, some flash gas produce, reduced the temperature of remaining liq, mixed low-temp low-pressure liquid gas mix refrigerant enters evaporimeter, when evaporation is from indoor absorption heat and flash to low-temp low-pressure gas in evaporimeter, entering gas-liquid separator by the 3rd control valve carries out entering compressor after gas-liquid separation, continuous and so forth, form continuous compression refrigeration circulation pattern.
Noting, when changing according to the season, will open first the heater a few minutes on gas-liquid separator before conversion from pump kind of refrigeration cycle pattern to the compression refrigeration circulation pattern, is 100% gaseous state with the cold-producing medium of guaranteeing to enter the compressor air suction mouth.
Pump kind of refrigeration cycle pattern is as follows:
During lower than 5 ℃, adopt pump kind of refrigeration cycle pattern when outdoor temperature.During work, at first close the 3rd control valve and compressor, open the second control valve and the first control valve, open refrigerated medium pump.The effect of refrigerated medium pump is the resistance that overcomes refrigerant tubing, realizes flowing of cold-producing medium.Whole process is to promote the pressure of low-temperature low-pressure refrigerant subcooled liquid with refrigerated medium pump, after the low temperature liquid cold-producing medium of rising pressure enters into the evaporimeter evaporation and heat-exchange via the second check valve, device for drying and filtering, the second control valve, utilize the principle of thermal siphon, make refrigerant vapour via the 3rd check valve, compressor bypass pipe natural flow in cold condenser, be condensed into the low-temp low-pressure subcooled liquid, enter again the entrance of refrigerated medium pump via reservoir, the first control valve, continuous and so forth, form continuous pump kind of refrigeration cycle pattern.
The utility model is combined with each other compression refrigeration circulation pattern and pump kind of refrigeration cycle pattern, both can be used for new unit, also can carry out reducing energy consumption to the old unit that has moved; And utilize the principle of thermal siphon, use refrigerated medium pump refrigerant liquid to be extracted in evaporimeter, heat absorption flashes to gas, then make the heat extraction in the cold condenser of refrigerant vapour natural flow that evaporimeter flows out be condensed into liquid.Energy-saving type air conditioner unit of the present utility model is applicable to computer floor, communications equipment room and the communication base station environment of non-comfortableness application scenario and controls.
Claims (10)
1. two kind of refrigeration cycle energy-saving type air conditioner unit, it is characterized in that: formed by indoor units (A), outdoor unit (B) and refrigerated medium pump energy-saving module (C), the outlet of described refrigerated medium pump energy-saving module is communicated with the entrance of indoor units by the first pipeline (11), the outlet of described indoor units is communicated with the entrance of outdoor unit by the second pipeline (12), the outlet of described outdoor unit is communicated with the entrance of refrigerated medium pump energy-saving module by the 3rd pipeline (13), and described refrigerated medium pump energy-saving module is located at outdoor.
2. a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit according to claim 1, it is characterized in that: described refrigerated medium pump energy-saving module comprises refrigerated medium pump (C1) and reservoir (C2), described cold-producing medium delivery side of pump and the first pipeline connection, have gas phase zone (C21) and liquid phase region (C22) in described reservoir, the entrance of described refrigerated medium pump is communicated with by the liquid phase region of refrigerant tubing (C11) and reservoir, described refrigerant tubing is provided with the first control valve (C12), be provided with refrigerated medium pump bypass pipe (C13) between described the first pipeline and refrigerant tubing, described refrigerated medium pump bypass pipe is provided with and makes cold-producing medium flow to first check valve (C14) of the first pipeline from refrigerant tubing.
3. a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit according to claim 2, it is characterized in that: described refrigerated medium pump is reverse circulation type canned motor pump, is provided with contrary circulation pipe (C15) between the gas phase zone of described reverse circulation type canned motor pump and reservoir and is communicated with.
4. a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit according to claim 2 is characterized in that: connecting the refrigerated medium pump place and be connected part between refrigerated medium pump bypass pipe place and be provided with and make cold-producing medium flow to second check valve (C16) of indoor units from the refrigerated medium pump energy-saving module on described the first pipeline.
5. a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit according to claim 1 and 2, it is characterized in that: described indoor units comprises evaporimeter (A1) and compressor (A2), the entrance of described evaporimeter and the first pipeline connection, the outlet of described evaporimeter is communicated with the entrance of compressor by the 4th pipeline (14), the outlet of described compressor and the second pipeline connection, the indoor section of described the first pipeline is provided with expansion valve (A3) and the expansion valve bypass pipe (A31) in parallel with expansion valve, described expansion valve bypass pipe is provided with the second control valve (A32), described the 4th pipeline is provided with the 3rd control valve (A11), be provided with compressor bypass pipe (A21) between part and the second pipeline between evaporimeter and the 3rd control valve on described the 4th pipeline, described compressor bypass pipe is provided with and makes cold-producing medium flow to the 3rd check valve (A22) of the second pipeline from the 4th pipeline.
6. a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit according to claim 5, is characterized in that: also be provided with gas-liquid separator (A4) on described the 4th pipeline on the part between the 3rd control valve and compressor.
7. a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit according to claim 6, it is characterized in that: described gas-liquid separator is provided with heater (A41).
8. a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit according to claim 5, it is characterized in that: the indoor section of described the first pipeline is provided with device for drying and filtering (A5), and cold-producing medium first flows to the junction of the first pipeline and expansion valve bypass pipe again through device for drying and filtering.
9. a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit according to claim 5 is characterized in that: be positioned on described the second pipeline and connect the compressor place and be connected compressor bypass pipe place and be provided with and make cold-producing medium flow to the 4th check valve (A23) of outdoor unit from indoor units.
10. a kind of pair of kind of refrigeration cycle energy-saving type air conditioner unit according to claim 5, it is characterized in that: described outdoor unit comprises condenser (B1), the entrance of described condenser and the second pipeline connection, the outlet of described condenser is communicated with the gas phase zone of reservoir by the 3rd pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201220650420.0U CN203010777U (en) | 2012-11-30 | 2012-11-30 | Dual-refrigeration-cycle energy-saving air conditioning unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220650420.0U CN203010777U (en) | 2012-11-30 | 2012-11-30 | Dual-refrigeration-cycle energy-saving air conditioning unit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764235A (en) * | 2015-04-10 | 2015-07-08 | 深圳科士达科技股份有限公司 | Fluoride pump air conditioning integration system for improving low temperature refrigeration ability |
| CN105135549A (en) * | 2015-09-11 | 2015-12-09 | 深圳市共济科技有限公司 | Landed type multi-connection precise air conditioner with natural cooling function |
| CN105423413A (en) * | 2014-09-22 | 2016-03-23 | 艾默生网络能源有限公司 | Refrigerating system of machine room |
| CN105423656A (en) * | 2015-12-23 | 2016-03-23 | 广东美的暖通设备有限公司 | Refrigeration system and control method thereof |
| CN106016465A (en) * | 2016-06-29 | 2016-10-12 | 四川依米康环境科技股份有限公司 | Variable frequency fluorine pump air conditioner |
| CN108613430A (en) * | 2018-04-26 | 2018-10-02 | 广东海悟科技有限公司 | A compressor and fluorine pump cycle refrigeration system |
| CN110513922A (en) * | 2019-08-30 | 2019-11-29 | 广东美的暖通设备有限公司 | Air-conditioning and its control method, computer readable storage medium |
| CN110709648A (en) * | 2017-06-13 | 2020-01-17 | 三菱电机株式会社 | Air conditioner |
| CN114867972A (en) * | 2019-12-26 | 2022-08-05 | Lg电子株式会社 | Air conditioning equipment |
| WO2023116343A1 (en) * | 2021-12-23 | 2023-06-29 | 华为数字能源技术有限公司 | Refrigeration system and control method for refrigeration system |
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2012
- 2012-11-30 CN CN201220650420.0U patent/CN203010777U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423413A (en) * | 2014-09-22 | 2016-03-23 | 艾默生网络能源有限公司 | Refrigerating system of machine room |
| CN104764235A (en) * | 2015-04-10 | 2015-07-08 | 深圳科士达科技股份有限公司 | Fluoride pump air conditioning integration system for improving low temperature refrigeration ability |
| CN105135549A (en) * | 2015-09-11 | 2015-12-09 | 深圳市共济科技有限公司 | Landed type multi-connection precise air conditioner with natural cooling function |
| CN105423656A (en) * | 2015-12-23 | 2016-03-23 | 广东美的暖通设备有限公司 | Refrigeration system and control method thereof |
| CN106016465A (en) * | 2016-06-29 | 2016-10-12 | 四川依米康环境科技股份有限公司 | Variable frequency fluorine pump air conditioner |
| CN110709648A (en) * | 2017-06-13 | 2020-01-17 | 三菱电机株式会社 | Air conditioner |
| CN110709648B (en) * | 2017-06-13 | 2021-06-22 | 三菱电机株式会社 | Air conditioner |
| CN108613430A (en) * | 2018-04-26 | 2018-10-02 | 广东海悟科技有限公司 | A compressor and fluorine pump cycle refrigeration system |
| CN110513922A (en) * | 2019-08-30 | 2019-11-29 | 广东美的暖通设备有限公司 | Air-conditioning and its control method, computer readable storage medium |
| CN114867972A (en) * | 2019-12-26 | 2022-08-05 | Lg电子株式会社 | Air conditioning equipment |
| CN114867972B (en) * | 2019-12-26 | 2023-11-07 | Lg电子株式会社 | Air conditioning equipment |
| WO2023116343A1 (en) * | 2021-12-23 | 2023-06-29 | 华为数字能源技术有限公司 | Refrigeration system and control method for refrigeration system |
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Granted publication date: 20130619 Termination date: 20161130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |