CN112393452B - Refrigerator refrigerating system and operation method thereof - Google Patents
Refrigerator refrigerating system and operation method thereof Download PDFInfo
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- CN112393452B CN112393452B CN202011360301.7A CN202011360301A CN112393452B CN 112393452 B CN112393452 B CN 112393452B CN 202011360301 A CN202011360301 A CN 202011360301A CN 112393452 B CN112393452 B CN 112393452B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005057 refrigeration Methods 0.000 claims abstract description 54
- 239000003507 refrigerant Substances 0.000 claims abstract description 36
- 230000001502 supplementing effect Effects 0.000 claims abstract description 27
- 230000008014 freezing Effects 0.000 claims description 26
- 238000007710 freezing Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims 2
- 230000009977 dual effect Effects 0.000 claims 2
- 230000006835 compression Effects 0.000 abstract description 12
- 238000007906 compression Methods 0.000 abstract description 12
- 239000013589 supplement Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 208000001034 Frostbite Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable devices
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a refrigerator refrigerating system and an operation method thereof. The refrigerator refrigerating system comprises a two-stage compressor and a flash evaporator, wherein a gas outlet of the flash evaporator is sequentially connected with a one-way valve, a gas supplementing capillary tube and a refrigeration evaporator and then communicated with a gas supplementing pipe of the two-stage compressor, a gas supplementing bypass is connected in parallel between the gas outlet of the flash evaporator and a refrigerant outlet of the refrigeration evaporator, and a first electromagnetic valve is arranged on the gas supplementing bypass. The refrigerator adopts the double-stage compression air supply side with the refrigerating chamber for refrigeration, so that the high-pressure, medium-pressure and low-pressure ratio can be effectively changed, the system energy efficiency is improved, the problem of low-pressure-difference refrigerant flowability is solved, and the refrigerating chamber evaporator of the refrigerator can be independently refrigerated.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigerator refrigeration system and an operation method thereof.
Background
The double-system refrigerator in the current market generally adopts a single-stage compression refrigeration system in a serial-parallel connection mode of a refrigeration evaporator and a freezing evaporator, and the scheme can solve the problems of odor tainting of refrigeration chambers and freezing chambers of the common air-cooled refrigerator, air duct frosting and the like. But the defects that the cold storage objects close to the back plate in the refrigerating chamber are easy to frost, the refrigerating efficiency of the refrigerating chamber is low, and the like exist. In view of the above-mentioned disadvantages, there are also two-stage compression dual-system schemes that use a high-pressure stage compression belt to refrigerate the refrigerating chamber, such as the refrigerating system disclosed in chinese patent CN 111578548A. However, the refrigerator system of the scheme has the problems of small pressure drop at the low-pressure side, large refrigerant resistance and poor refrigerating effect at the low-pressure side, the discharge capacity of the compressor needs to be increased, and the energy-saving property needs to be improved.
Therefore, the following problems are technical problems to be solved in the art:
1. the refrigeration efficiency is reduced due to the low evaporation temperature of the refrigerating chamber, and refrigerated objects are easy to freeze;
2. the pressure ratio distribution of the two-stage system is unbalanced, the energy efficiency of the system is influenced, and the low-pressure stage refrigeration efficiency is low;
3. the refrigerator compartment cannot be cooled alone.
Disclosure of Invention
The invention provides a refrigerator refrigerating system and an operation method thereof, which aim to solve the problems that the refrigerating energy efficiency is reduced, refrigerated objects are easy to freeze, and a refrigerating chamber cannot be independently refrigerated in the prior art.
The invention provides a refrigerator refrigerating system which comprises a two-stage compressor and a flash evaporator, wherein a gas outlet of the flash evaporator is sequentially connected with a gas supplementing one-way valve, a gas supplementing capillary tube and a refrigerating evaporator and then communicated with a gas supplementing pipe of the two-stage compressor, a gas supplementing bypass is connected between an outlet of the gas supplementing one-way valve and an outlet of the refrigerating evaporator in parallel, and a first electromagnetic valve is arranged on the gas supplementing bypass.
Preferably, a medium-pressure bypass is connected between the medium-pressure cavity of the two-stage compressor and the low-pressure suction pipe of the two-stage compressor, and a second electromagnetic valve is arranged on the medium-pressure bypass.
The refrigerator refrigerating system provided by the invention also comprises a condenser and a high-pressure throttling device which are arranged behind the exhaust port of the two-stage compressor, and a liquid supply electromagnetic valve, a low-pressure throttling device and a freezing evaporator which are arranged between the liquid outlet of the flash evaporator and the low-pressure air suction port of the two-stage compressor.
Preferably, the refrigerator refrigeration system provided by the invention further comprises a high-pressure heat regenerator, the high-pressure throttling device adopts a high-pressure capillary tube, a refrigerant in the high-pressure capillary tube and a refrigerant in the air supply capillary tube exchange heat in the high-pressure heat regenerator, and an outlet pipeline of the refrigeration evaporator is communicated with the air supply pipe after passing through the high-pressure heat regenerator.
Preferably, the refrigeration system of the refrigerator provided by the invention further comprises a low-pressure heat regenerator, the low-pressure throttling device adopts a low-pressure capillary tube, and the refrigerant at the outlet of the freezing evaporator and the refrigerant in the low-pressure capillary tube enter the low-pressure air suction port through the air suction check valve after heat exchange in the low-pressure heat regenerator.
Preferably, the high-pressure throttling device and the low-pressure throttling device adopt a thermal expansion valve or an electronic expansion valve.
The invention also provides an operation method of the refrigerator, which comprises the following steps: the refrigerating system comprises a freezing chamber and refrigerating chamber both refrigerating mode, a freezing chamber single refrigerating mode and a refrigerating chamber single chamber refrigerating mode.
In the refrigerating operation mode of the freezing chamber and the refrigerating chamber, the first electromagnetic valve on the air supplementing bypass and the second electromagnetic valve on the medium-pressure bypass are closed.
In the operation mode of refrigerating the freezing chamber independently, a first electromagnetic valve on the air supplementing bypass is opened, and a second electromagnetic valve on the middle-pressure bypass is closed.
In the operation mode of refrigerating the refrigerating chamber independently, the first electromagnetic valve on the air make-up bypass is closed, and the second electromagnetic valve on the medium-pressure bypass is opened.
The invention also provides a refrigerator which adopts the refrigeration system and the operation method.
Compared with the traditional double-system refrigerator and a common double-stage compression technology, the refrigerating system can regulate and control the optimal pressure ratio of high-pressure stage compression and low-pressure stage compression, can realize the complete independent control of the freezing chamber and the refrigerating chamber from the functional angle, improves the energy efficiency ratio of the refrigerator by about 10 percent, and can reduce the frostbite risk of a refrigerated object by improving the refrigeration evaporation temperature.
Drawings
The invention is described in detail below with reference to the following figures and specific examples, wherein:
FIG. 1 is a schematic diagram of a refrigeration system of the present invention;
FIG. 2 is a schematic flow diagram of the refrigeration of both the fresh food compartment and the freezer compartment of the present invention;
FIG. 3 is a schematic flow diagram of the present invention for the independent refrigeration of the freezer compartment;
FIG. 4 is a schematic flow diagram of the independent refrigeration of the refrigerated compartment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are only for illustrating the present invention and are not to be construed as limiting the present invention.
The invention provides a refrigerator refrigerating system which uses saturated gas throttling at a gas supplementing side to provide cold for a refrigerating chamber so as to meet the requirement of independent refrigeration of the refrigerating chamber.
As shown in fig. 1, the refrigeration system of the refrigerator provided by the invention comprises a two-stage compressor 1, a condenser 2, a high-pressure throttling device 3, a flash evaporator 8, a low-pressure throttling device 12 and a freezing evaporator 11 which are sequentially connected through pipelines. In this embodiment, the high-pressure throttle device 3 and the low-pressure throttle device 12 each use a capillary tube. The gas outlet of the flash tank 8 is connected with the one-way valve 6, the air supply capillary 4 and the refrigeration evaporator 5 in sequence and then communicated with the air supply pipe 18 of the two-stage compressor 1. An air supply bypass 16 is connected in parallel between the outlet of the one-way valve 6 and the refrigerant outlet of the refrigeration evaporator 5, and a first electromagnetic valve 15 is arranged on the air supply bypass. A medium-pressure bypass 17 is connected in parallel between the medium-pressure cavity and the low-pressure air suction port of the two-stage compressor 1, and a second electromagnetic valve 14 is arranged on the medium-pressure bypass.
Preferably, the refrigeration system of the refrigerator further comprises a high-pressure regenerator 7, and the refrigerant in the high-pressure capillary tube and the refrigerant in the gas supplementing capillary tube 4 exchange heat in the high-pressure regenerator. The outlet pipeline of the refrigeration evaporator is communicated with the air supply pipe 18 after heat exchange in the high-pressure heat regenerator 7.
Preferably, the refrigeration system of the refrigerator further comprises a low-pressure regenerator 10, in which the refrigerant in the low-pressure capillary tube between the liquid outlet of the flash evaporator 8 and the inlet of the freeze evaporator 11 exchanges heat with the refrigerant at the outlet of the freeze evaporator 11.
As shown in fig. 1, high-temperature and high-pressure gas discharged from a high-pressure stage of the two-stage compressor 1 flows to the condenser 2 to exchange heat, and is changed into high-pressure and normal-temperature liquid, and then the high-pressure liquid is throttled and depressurized by the high-pressure capillary tube to be changed into low-temperature and low-pressure liquid, and then the low-temperature and low-pressure liquid is introduced to the. The gas outlet of the flash tank 8 is connected with a check valve 6, an air supplement capillary 4 and a refrigeration evaporator 5 and is finally connected with an air supplement port of the two-stage compressor 1. The air supply bypass 16 is connected in parallel with the air supply capillary 4 and the refrigeration evaporator 5, and is provided with a first electromagnetic valve 15 for controlling the opening and closing of the air supply bypass. The liquid refrigerant in the flash tank 8 passes through the liquid supply electromagnetic valve 9 and then is led to the low-pressure side capillary tube and the freezing chamber evaporator 11, the refrigerant in the outlet pipeline of the freezing evaporator exchanges heat with the refrigerant in the low-pressure capillary tube in the low-pressure heat regenerator 10, and then enters the two-stage compressor through the air suction one-way valve 13 and the low-pressure air suction pipe. And a medium-pressure bypass 17 is connected between the medium-pressure cavity of the two-stage compressor and the air suction port of the two-stage compressor, a second electromagnetic valve 14 is arranged on the medium-pressure bypass, and the second electromagnetic valve controls the opening or closing of the medium-pressure bypass 17.
In the refrigeration system provided by the invention, the saturated gaseous refrigerant for middle-pressure air supplement is throttled and enters the air supplement port, so that the energy measured by air supplement is effectively utilized, and the middle air supplement pressure can be synchronously adjusted, so that the pressure ratio of a high-pressure stage and a low-pressure stage is maintained at a better energy efficiency level.
The refrigerator refrigeration system provided by the invention comprises three operation modes: the refrigerating system comprises a freezing chamber and refrigerating chamber both refrigerating mode, a freezing chamber single refrigerating mode and a refrigerating chamber single chamber refrigerating mode.
1. Refrigerating modes of the freezing chamber and the refrigerating chamber:
in the mode refrigeration cycle, as shown in fig. 2, a high-temperature and high-pressure refrigerant is exhausted by the two-stage compressor 1, flows into the condenser 2 to be changed into medium-temperature and high-pressure liquid, is subjected to primary throttling by the high-pressure capillary tube, is further subcooled in the heat regenerator 7, then reaches the flash tank 8, is subjected to flash vaporization, is subjected to throttling by the gas supplementing capillary tube 4 through the gas supplementing one-way valve 6, is converted into gas-liquid two phase from saturated gas refrigerant, is further subcooled in the heat regenerator 7, is subjected to heat exchange in the refrigeration evaporator 5, and then reaches the gas supplementing tube 18 of the two-stage compressor 1 through the heat regenerator 7, at this time, the first electromagnetic valve 15 is always in a closed state, and the refrigerant does not pass through the gas supplementing bypass 16. The liquid refrigerant at the bottom of the flash evaporator is overcooled in a low-pressure heat regenerator 10 through a liquid supply electromagnetic valve 9 and is subjected to secondary throttling through a low-pressure capillary tube to be supplied to a freezing chamber evaporator 11, so that the refrigerating requirements of freezing and other low-temperature chambers are met. The gaseous refrigerant at the outlet of the freezing chamber is overheated in the low-pressure heat regenerator 10 and then enters the low-pressure stage suction port of the two-stage compressor 1 through the suction check valve 13, at the moment, the medium-pressure bypass second electromagnetic valve 14 is closed, and the refrigerant does not pass through the medium-pressure bypass.
Compared with the traditional two-stage compression refrigeration system, the refrigeration system which circularly operates can regulate and control the optimal pressure ratio of high-pressure stage compression and low-pressure stage compression, improve the energy efficiency ratio of the system by about 10 percent, increase the low-pressure stage refrigeration efficiency, and reduce the frostbite risk of refrigerated objects by improving the refrigeration evaporation temperature.
2. Freezing chamber individual refrigeration mode:
the circulation of the single refrigeration of the freezing chamber is shown in fig. 3, the high-temperature and high-pressure refrigerant is exhausted by the double-stage compressor 1, is changed into medium-temperature and high-pressure liquid by the condenser 2, is subjected to primary throttling by the high-pressure capillary tube and further supercooled in the heat regenerator 7, then reaches the flash tank 8 for flash vaporization, passes through the gaseous state outlet of the flash tank to the air supplementing one-way valve 6, then reaches the heat regenerator 7 through the first electromagnetic valve 15 of the air supplementing bypass for heat exchange, and finally leads to the air supplementing pipeline of the double-stage compressor 1. Because the first electromagnetic valve 15 is opened, the refrigerant flows away from the air supply bypass 16, and the refrigeration evaporator does not refrigerate. Liquid refrigerant at the bottom of the flash tank 8 is overcooled in a low-pressure heat regenerator 10 through a liquid supply electromagnetic valve 9 and is subjected to secondary throttling through a low-pressure capillary tube, and the liquid refrigerant is supplied to a freezing evaporator 11 to meet the refrigerating requirement of a freezing chamber. The gaseous refrigerant from the refrigeration evaporator is superheated in the low-pressure heat regenerator 10 and then enters the low-pressure stage suction port of the two-stage compressor 1 through the suction check valve 13. The second solenoid valve 14 on the medium-pressure bypass 7 is now closed.
According to the circulation operation, the refrigerating system can realize independent refrigeration of the freezing chamber.
3. Independent refrigerating mode of refrigerating chamber:
when the refrigerating chamber is independently refrigerated, the system refrigeration cycle is as shown in fig. 4, a high-temperature high-pressure refrigerant is exhausted through the two-stage compressor 1, flows into the condenser 2 to be changed into medium-temperature high-pressure liquid, is subjected to primary throttling through the high-pressure capillary tube and is further supercooled in the heat regenerator 7, then reaches the flash tank 8 to be flashed, a gaseous refrigerant reaches the gas-supplementing capillary tube 4 through the gas-supplementing one-way valve 6 to be throttled, is converted into gas-liquid two phase from saturated gaseous refrigerant, is further supercooled in the heat regenerator 7 at the same time, then exchanges heat in the refrigerating evaporator 5 to meet the refrigerating requirement of the refrigerating chamber, and finally reaches the two-stage compressor 1 through the heat regenerator 7 to be compressed. At this time, the second electromagnetic valve 14 is opened, and the air supply pipe flow path is switched to enter the two-stage compressor for compression through the second electromagnetic valve 14 and then through the low-pressure air suction port of the two-stage compressor. The independent refrigerating mode of the refrigerating chamber does not need air supplement, and the air supplement effect is not obvious because the pressure ratio is small. In this cycle, the first solenoid valve 15 is always in the closed state. The liquid supply electromagnetic valve 9 is in a closed state, and the refrigerant does not pass through a refrigeration loop of the refrigeration evaporator.
According to the refrigerating system circularly performed, the independent refrigeration of the refrigerating chamber can be realized.
When the high-pressure and low-pressure regenerative devices are not used, the high-pressure throttling device 7 and the low-pressure throttling device 12 can adopt a thermal expansion valve or an electronic expansion valve, and at the moment, high-precision flow distribution can be realized through the thermal expansion valve or the electronic expansion valve.
The scheme of the refrigerator for refrigerating through the double-stage compression air supply side with the refrigerating chamber can effectively change the high-pressure, medium-pressure and low-pressure ratio, improve the system energy efficiency, solve the problem of low-pressure-difference refrigerant flowability, and solve the problems that a refrigerating chamber evaporator of the existing double-system refrigerator cannot be opened singly, and the refrigerated substances on the back plate side of the refrigerating chamber are easy to frost and the like.
The foregoing is considered as illustrative only of the embodiments of the invention. It should be understood that any modifications, equivalents and changes made within the spirit and framework of the inventive concept are intended to be included within the scope of the present invention.
Claims (11)
1. The refrigerator refrigerating system comprises a two-stage compressor and a flash evaporator, and is characterized in that a gas outlet of the flash evaporator is sequentially connected with a gas supplementing one-way valve, a gas supplementing capillary tube and a refrigerating evaporator and then communicated with a gas supplementing pipe of the two-stage compressor, a gas supplementing bypass is connected in parallel between the outlet of the gas supplementing one-way valve and the outlet of the refrigerating evaporator, and a first electromagnetic valve is arranged on the gas supplementing bypass.
2. The refrigeration system as claimed in claim 1, wherein a medium pressure bypass is connected between the medium pressure chamber of the two-stage compressor and the low pressure suction pipe of the two-stage compressor, and a second solenoid valve is disposed on the medium pressure bypass.
3. The refrigeration system of claim 2 further comprising a condenser and a high pressure throttling device disposed after the discharge of the dual stage compressor, and a feed solenoid valve, a low pressure throttling device and a freeze evaporator disposed between the liquid outlet of said flash evaporator and the low pressure suction of the dual stage compressor.
4. The refrigeration system of claim 3 further comprising a high pressure regenerator, wherein the high pressure throttling device is a high pressure capillary tube, the refrigerant in the high pressure capillary tube exchanges heat with the refrigerant in the air make-up capillary tube in the high pressure regenerator, and the outlet pipe of the refrigeration evaporator passes through the high pressure regenerator and then communicates with the air make-up pipe.
5. The refrigeration system as claimed in claim 3, further comprising a low pressure heat regenerator, wherein the low pressure throttling device is a low pressure capillary tube, and the refrigerant at the outlet of the freezing evaporator and the refrigerant in the low pressure capillary tube enter the low pressure suction port through the suction check valve after exchanging heat in the low pressure heat regenerator.
6. The refrigeration system of claim 3 wherein said high pressure throttling means and said low pressure throttling means are thermal expansion valves or electronic expansion valves.
7. A method of operating a refrigeration system for a refrigerator according to any one of claims 3 to 6, including: the refrigerating system comprises a freezing chamber and refrigerating chamber both refrigerating mode, a freezing chamber single refrigerating mode and a refrigerating chamber single chamber refrigerating mode.
8. The method of operation of claim 7 wherein in both freezer and refrigerator cooling modes of operation, the first solenoid valve on the make-up air bypass and the second solenoid valve on the medium pressure bypass are both closed.
9. The method of claim 7 wherein in a freezer only refrigeration mode of operation, the first solenoid valve on the gas make-up bypass is open and the second solenoid valve on the medium pressure bypass is closed.
10. The method of claim 7 wherein in a chiller only cooling mode of operation, the first solenoid on the make-up bypass is closed and the second solenoid on the intermediate pressure bypass is open.
11. A refrigerator characterized in that it employs the refrigeration system of the refrigerator as claimed in any one of claims 3 to 6.
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| CN202011360301.7A CN112393452B (en) | 2020-11-27 | 2020-11-27 | Refrigerator refrigerating system and operation method thereof |
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| CN202011360301.7A CN112393452B (en) | 2020-11-27 | 2020-11-27 | Refrigerator refrigerating system and operation method thereof |
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| CN112393452B true CN112393452B (en) | 2021-07-20 |
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| CN112728799B (en) * | 2020-12-09 | 2021-12-10 | 上海交通大学 | Based on CO2Flash evaporation system of mixed refrigerant |
| CN114739072B (en) * | 2022-04-13 | 2023-04-28 | 天津大学 | Ice rink refrigerating system |
| CN114739071B (en) * | 2022-04-13 | 2023-04-28 | 天津大学 | Ice rink refrigeration plant and system |
| CN115031454A (en) * | 2022-04-13 | 2022-09-09 | 欧悦冰雪投资管理（北京）有限公司 | Ice rink refrigerating system |
| CN114719478A (en) * | 2022-04-13 | 2022-07-08 | 欧悦冰雪投资管理（北京）有限公司 | Control method and device for refrigeration device, electronic equipment and storage medium |
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| US7770406B2 (en) * | 2003-11-28 | 2010-08-10 | Kabushiki Kaisha Toshiba | Refrigerator |
| CN102338496B (en) * | 2011-09-30 | 2013-08-14 | 浙江大学 | Multi-temperature-zone refrigeration system with vortex tube |
| CN105402979B (en) * | 2015-12-12 | 2018-01-16 | 西安交通大学 | A kind of new refrigerator refrigeration system of non-azeotropic mixed working medium fractional condensation circulation |
| US10443932B2 (en) * | 2016-05-31 | 2019-10-15 | Linde Aktiengesellschaft | Refrigerant vent rectifier and efficiency booster |
| CN107576085B (en) * | 2017-08-21 | 2023-11-07 | 珠海格力电器股份有限公司 | Refrigerating system |
| CN107461955A (en) * | 2017-08-30 | 2017-12-12 | 广东美芝制冷设备有限公司 | Refrigeration system |
| CN210425610U (en) * | 2019-08-26 | 2020-04-28 | 珠海格力电器股份有限公司 | Refrigeration system |
| CN111578548B (en) * | 2020-05-25 | 2021-02-26 | 珠海格力电器股份有限公司 | Refrigerator refrigerating system and control method thereof |
| CN111928509B (en) * | 2020-06-16 | 2022-04-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Refrigerator refrigerating system, control method thereof and refrigerator |
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