CN111412687A - Refrigeration and heating integrated heat exchange system - Google Patents

Refrigeration and heating integrated heat exchange system Download PDF

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Publication number
CN111412687A
CN111412687A CN202010210064.XA CN202010210064A CN111412687A CN 111412687 A CN111412687 A CN 111412687A CN 202010210064 A CN202010210064 A CN 202010210064A CN 111412687 A CN111412687 A CN 111412687A
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CN
China
Prior art keywords
heat exchanger
heat
branch
refrigerant
outlet pipeline
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Pending
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CN202010210064.XA
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Chinese (zh)
Inventor
魏绵源
袁明征
史帆
白国建
刘志孝
闫克江
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202010210064.XA priority Critical patent/CN111412687A/en
Publication of CN111412687A publication Critical patent/CN111412687A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0096Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00Subcoolers, desuperheaters or superheaters
    • F25B40/06Superheaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00General constructional features
    • F25D23/12Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00Details or features not otherwise provided for
    • F24F2221/18Details or features not otherwise provided for combined with domestic apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00Details or features not otherwise provided for
    • F24F2221/18Details or features not otherwise provided for combined with domestic apparatus
    • F24F2221/183Details or features not otherwise provided for combined with domestic apparatus combined with a hot-water boiler

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

The invention provides a refrigeration and heating integrated heat exchange system, which comprises: the heat exchanger comprises a compressor and a first heat exchanger, wherein the first heat exchanger can be communicated with a gas outlet of the compressor so that refrigerant emits heat in the first heat exchanger; the refrigerant comprises a low boiling point refrigerant, a medium boiling point refrigerant and a high boiling point refrigerant; one end of the second heat exchanger can be communicated with an air suction port of the compressor, the other end of the second heat exchanger can be communicated with the first heat exchanger, and high-boiling-point refrigerant can be refrigerated in the second heat exchanger; one end of the third heat exchanger can be communicated with an air suction port of the compressor, the other end of the third heat exchanger can be communicated with the first heat exchanger, and the low-boiling-point refrigerant can absorb heat in the third heat exchanger to refrigerate. The invention can effectively utilize the heat or the cold energy by the refrigerant to prepare the required hot water, air cold energy, refrigeration cold energy, refrigerator cold energy and the like, effectively utilizes the waste heat, fully utilizes the waste heat generated in the refrigeration process to be used for a heating system, and improves the energy efficiency of the system.

Description

Refrigeration and heating integrated heat exchange system
Technical Field
The invention relates to the technical field of heat exchange, in particular to a refrigeration and heating integrated heat exchange system.
Background
At present, large-scale refrigerating devices such as refrigerators and freezing chambers in the prior art need to consume a large amount of energy in the refrigerating process, and a large amount of heat can be discharged to the outside air in the refrigerating process, so that energy waste is caused. Heating or refrigerating devices such as water heaters, air conditioners, refrigerators and the like are all provided with an independent outdoor unit, so that the comprehensive cost is high, and the occupied area is large (particularly commercial heating or refrigerating devices). With the development of social economy, the problem of energy conservation is more and more prominent, and the integrated device and the system have wide markets.
Because the heating or refrigerating devices such as a water heater, an air conditioner, a refrigerator and the like in the prior art work independently, a large amount of heat loss exists, and a considerable part of waste heat is not utilized; the invention relates to a refrigeration and heating integrated heat exchange system, which solves the technical problems that the comprehensive cost of individual outdoor units respectively matched with heating or refrigerating devices such as a water heater, an air conditioner, a refrigeration device and the like is higher, the occupied area is larger (especially commercial heating or refrigerating devices) and the like.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that a large amount of heat is lost when heating or refrigerating devices such as a water heater, an air conditioner, a refrigerator and the like in the prior art work independently, so that a refrigerating and heating integrated heat exchange system is provided.
In order to solve the above problems, the present invention provides a refrigeration and heating integrated heat exchange system, which includes:
a compressor and a first heat exchanger communicable with a discharge port of the compressor such that refrigerant gives off heat in the first heat exchanger;
the refrigerant is a mixed non-azeotropic refrigerant and comprises a low boiling point refrigerant, a medium boiling point refrigerant and a high boiling point refrigerant, wherein the low boiling point refrigerant < the medium boiling point refrigerant < the high boiling point refrigerant according to the boiling point from low to high;
the refrigeration system also comprises a second heat exchanger, one end of the second heat exchanger can be communicated to the air suction port of the compressor, the other end of the second heat exchanger can be communicated with the first heat exchanger, a first throttling device is further arranged between the first heat exchanger and the second heat exchanger, and the high-boiling-point refrigerant can absorb heat in the second heat exchanger to refrigerate;
the refrigeration system also comprises a third heat exchanger, one end of the third heat exchanger can be communicated to the air suction port of the compressor, the other end of the third heat exchanger can be communicated with the first heat exchanger, a second throttling device is further arranged between the first heat exchanger and the third heat exchanger, and the low-boiling-point refrigerant can absorb heat in the third heat exchanger to refrigerate.
Preferably, the outdoor heat exchanger, the first branch and the second branch are further included, one end of the first branch can be communicated with the first heat exchanger, the other end of the first branch can be communicated with the first throttling device, the first branch penetrates through the outdoor heat exchanger so that the refrigerant passing through the first branch can release heat in the outdoor heat exchanger, and a third control valve is arranged on the first branch;
one end of the second branch can be communicated with the air suction port of the compressor, the other end of the second branch can be communicated with the second heat exchanger or the third heat exchanger, the second branch also penetrates through the outdoor heat exchanger so that the refrigerant passing through the second branch can absorb heat in the outdoor heat exchanger, and a fourth control valve is arranged on the second branch.
Preferably, the device further comprises a third branch and a fourth branch, wherein the third branch is connected with the first branch in parallel, the third branch is provided with a second control valve, the fourth branch is connected with the second branch in parallel, and the fourth branch is provided with a fifth control valve.
Preferably, the pipeline where the first heat exchanger is located is a fifth branch, a sixth control valve is arranged on the fifth branch, a sixth branch is further arranged in parallel with the fifth branch, and a first control valve is arranged on the sixth branch.
Preferably, a first flash evaporator is further arranged between the first throttling device and the second heat exchanger, the input end of the first flash evaporator is communicated with the first throttling device, the second heat exchanger is arranged on a first liquid outlet pipeline of the first flash evaporator, the second throttling device is arranged on a first gas outlet pipeline of the first flash evaporator, and a third throttling device is further arranged on a pipe section, located between the first flash evaporator and the second heat exchanger, of the first liquid outlet pipeline.
Preferably, the heat exchanger further comprises a second flash evaporator, the first gas outlet pipeline is communicated with the input end of the second flash evaporator, the second throttling device is arranged on the first gas outlet pipeline, and the second gas outlet pipeline of the second flash evaporator can be communicated to the third heat exchanger;
and a fourth throttling device is arranged on a second liquid outlet pipeline of the second flash evaporator, and the liquid outlet pipeline of the second flash evaporator can also be communicated to a suction port of the compressor.
Preferably, the refrigeration system further comprises a first heat recovery device, the second gas outlet line penetrates through the first heat recovery device, and a pipe section of the second liquid outlet line between the fourth throttling device and the compressor penetrates through the first heat recovery device, so that the refrigerant in the second gas outlet line and the refrigerant in the second liquid outlet line exchange heat in the first heat recovery device, and the refrigerant in the second gas outlet line is cooled.
Preferably, the heat recovery device further comprises a second heat recovery device, a pipe section of the second gas outlet pipeline between the first heat recovery device and the third heat exchanger penetrates through the second heat recovery device, and a pipe section between the third heat exchanger and the compressor penetrates through the second heat recovery device, so that the refrigerant in the second gas outlet pipeline and the refrigerant in the pipe section between the third heat exchanger and the compressor exchange heat in the second heat recovery device, and the refrigerant in the second gas outlet pipeline is cooled.
Preferably, a fifth throttling device is further disposed on a pipe section of the second gas outlet pipeline between the second heat regenerator and the third heat exchanger, and a pipe section of the second liquid outlet pipeline between the first heat regenerator and the compressor is communicated to a pipe section between the second heat regenerator and the compressor.
Preferably, the first heat exchanger is an electric heating water tank; and/or the second heat exchanger is a refrigerator or an air conditioner; and/or the third heat exchanger is a refrigerator.
The refrigeration and heating integrated heat exchange system provided by the invention has the following beneficial effects:
the invention adopts the first heat exchanger for heat release and heating, the second heat exchanger and the third heat exchanger for heat absorption and refrigeration, and adopts three or more mixed non-azeotropic refrigerants with different boiling points, so that the mixed refrigerant can prepare hot water or other refrigerants in the first heat exchanger, and prepare cold energy with lower temperature in the second heat exchanger for air-conditioning refrigeration or refrigerator refrigeration, and the like, and the cold energy with lower temperature can be effectively prepared by the low-boiling refrigerant in the third heat exchanger for low-temperature refrigeration and other conditions, therefore, the single heating, refrigerating and other devices in the prior art are effectively designed and manufactured into an integrated system, so that the refrigerant can effectively utilize heat or cold energy in the system to prepare required hot water, air cold energy, refrigerating cold energy, refrigerator cold energy and the like, the waste heat is effectively utilized, and the condition of great heat loss is avoided, the waste heat generated in the refrigeration process is fully utilized for the heating system, and the energy efficiency of the system is improved. Meanwhile, the heating and refrigerating plates can work independently according to requirements, the intelligent control and operation beneficial effects are achieved, outdoor units do not need to be arranged on heating or refrigerating devices such as water heaters, air conditioners and refrigeration devices, comprehensive cost is effectively reduced, occupied area is greatly reduced (particularly commercial heating or refrigerating devices), and effective integration of the heating and refrigerating devices is achieved.
Drawings
FIG. 1 is a system diagram of a water heater, a refrigerator and a freezing device in the integrated heat exchange system for cooling and heating according to the present invention;
FIG. 2 is a system structure diagram of the refrigeration and heating integrated heat exchange system of the present invention when only a water heater works alone;
fig. 3 is a system structure diagram of the refrigeration-refrigeration combined operation only in the refrigeration-heating integrated heat exchange system of the present invention.
The reference numerals are represented as:
1. a compressor; 2. a first heat exchanger; 30. a first heat recovery device; 31. a second heat recovery device; 40. a first throttling device; 41. a second throttling device; 42. a third throttling means; 43. a fourth throttling device; 44. a fifth throttling device; 50. a first flash evaporator; 51. a second flash evaporator; 6. a second heat exchanger; 7. a third heat exchanger; 8. an outdoor heat exchanger; 91. a first control valve; 92. a second control valve; 93. a third control valve; 94. a fourth control valve; 95. a fifth control valve; 90. a sixth control valve; 101. a first branch; 102. a second branch circuit; 103. a third branch; 104. a fourth branch; 105. a fifth branch; 106. a sixth branch; 201. a first liquid outlet line; 202. a first gas outlet line; 203. a second liquid outlet line; 204. a second gas outlet line.
Detailed Description
As shown in fig. 1 to 3, the present invention provides a refrigeration and heating integrated heat exchange system, which includes:
a compressor 1 and a first heat exchanger 2, the first heat exchanger 2 being communicable with a discharge port of the compressor 1 such that refrigerant gives off heat in the first heat exchanger 2;
the refrigerant is a mixed non-azeotropic refrigerant and comprises a low boiling point refrigerant, a medium boiling point refrigerant and a high boiling point refrigerant, wherein the low boiling point refrigerant < the medium boiling point refrigerant < the high boiling point refrigerant according to the boiling point from low to high;
the refrigeration system further comprises a second heat exchanger 6, one end of the second heat exchanger 6 can be communicated to a suction port of the compressor 1, the other end of the second heat exchanger 6 can be communicated with the first heat exchanger 2, a first throttling device 40 is further arranged between the first heat exchanger 2 and the second heat exchanger 6, and the high-boiling-point refrigerant can absorb heat in the second heat exchanger 6 to refrigerate;
the refrigeration system further comprises a third heat exchanger 7, one end of the third heat exchanger 7 can be communicated to a suction port of the compressor 1, the other end of the third heat exchanger 7 can be communicated with the first heat exchanger 2, a second throttling device 41 is further arranged between the first heat exchanger 2 and the third heat exchanger 7, and the low-boiling-point refrigerant can absorb heat in the third heat exchanger 7 to refrigerate.
The invention adopts the first heat exchanger for heat release and heating, the second heat exchanger and the third heat exchanger for heat absorption and refrigeration, and adopts three or more mixed non-azeotropic refrigerants with different boiling points, so that the mixed refrigerant can prepare hot water or other refrigerants in the first heat exchanger, and prepare cold energy with lower temperature in the second heat exchanger for air-conditioning refrigeration or refrigerator refrigeration, and the like, and the cold energy with lower temperature can be effectively prepared by the low-boiling refrigerant in the third heat exchanger for low-temperature refrigeration and other conditions, therefore, the single heating, refrigerating and other devices in the prior art are effectively designed and manufactured into an integrated system, so that the refrigerant can effectively utilize heat or cold energy in the system to prepare required hot water, air cold energy, refrigerating cold energy, refrigerator cold energy and the like, the waste heat is effectively utilized, and the condition of great heat loss is avoided, the waste heat generated in the refrigeration process is fully utilized for the heating system, and the energy efficiency of the system is improved. Meanwhile, the heating and refrigerating plates can work independently according to requirements, the intelligent control and operation beneficial effects are achieved, outdoor units do not need to be arranged on heating or refrigerating devices such as water heaters, air conditioners and refrigeration devices, comprehensive cost is effectively reduced, occupied area is greatly reduced (particularly commercial heating or refrigerating devices), and effective integration of the heating and refrigerating devices is achieved.
Preferably, the outdoor heat exchanger 8, a first branch 101 and a second branch 102 are further included, one end of the first branch 101 can be communicated with the first heat exchanger 2, the other end of the first branch 101 can be communicated with the first throttling device 40, the first branch 101 penetrates through the outdoor heat exchanger 8 so that the refrigerant passing through the first branch 101 can release heat in the outdoor heat exchanger 8, and a third control valve 93 is arranged on the first branch 101;
one end of the second branch 102 can communicate with the suction port of the compressor 1, and the other end can communicate with the second heat exchanger 6 or the third heat exchanger 7, the second branch 101 also passes through the outdoor heat exchanger 8 so that the refrigerant passing through the second branch 101 can absorb heat in the outdoor heat exchanger 8, and the second branch 102 is provided with a fourth control valve 94.
The refrigerating and heating integrated heat exchange system has a further preferable structure form, namely, the outdoor heat exchanger is arranged to enable refrigerant to effectively exchange heat with outdoor air, the first heat exchanger for heating, the second heat exchanger for refrigerating and the second heat exchanger can be effectively supplemented with cold/heat, the heat release/absorption capacity of the whole system is balanced, the heat release of the first heat exchanger and the normal refrigeration of the second heat exchanger and the third heat exchanger are effectively ensured, the outdoor heat exchanger can work together with the first heat exchanger, the function of independently preparing heat (such as hot water) by the first heat exchanger through the heat absorption of the outdoor heat exchanger can be realized, the outdoor heat exchanger can work together with the second heat exchanger and/or the third heat exchanger, and the function of independently preparing cold (such as refrigerator refrigeration) by the second heat exchanger through the heat release of the outdoor heat exchanger, The function that the third heat exchanger independently produces cold energy (such as low-temperature freezing or a low-temperature cold storage) can be realized through heat release of the outdoor heat exchanger, or the function that the second heat exchanger produces cold energy (such as refrigerator refrigeration) can be realized while the function that the third heat exchanger produces cold energy (such as low-temperature freezing or the low-temperature cold storage) can be realized through heat release of the outdoor heat exchanger.
Preferably, the control device further comprises a third branch 103 and a fourth branch 104, the third branch 103 is connected in parallel with the first branch 101, a second control valve 92 is arranged on the third branch 103, the fourth branch 104 is connected in parallel with the second branch 102, and a fifth control valve 95 is arranged on the fourth branch 104. The control function of parallel short circuit can be effectively carried out on the heat release branch of the outdoor heat exchanger through the third branch and the second control valve which are arranged in parallel with the first branch, so that the control valve of the first branch where the outdoor heat exchanger is located is opened and the second control valve on the third branch is closed when the outdoor heat exchanger is required to release heat, the control valve of the branch where the outdoor heat exchanger is located is closed and the second control valve on the third branch is opened when the outdoor heat exchanger is required to close heat release, and the short circuit of the first branch is formed; the control function of parallel short circuit can be effectively carried out on the heat absorption branch of the outdoor heat exchanger through the fourth branch and the fifth control valve which are arranged in parallel with the second branch, so that the control valve of the second branch where the outdoor heat exchanger is located is opened and the fifth control valve on the fourth branch is closed when the outdoor heat exchanger is required to absorb heat, the control valve of the second branch where the outdoor heat exchanger is located is closed and the fifth control valve on the fourth branch is opened when the outdoor heat exchanger is required to close to absorb heat, and the short circuit of the second branch is formed; therefore, whether the outdoor heat exchanger releases heat or absorbs heat or is completely closed is intelligently controlled according to the heating and refrigerating requirements, and intelligent control of the integrated heat exchange system is realized.
Preferably, the pipeline where the first heat exchanger 2 is located is a fifth branch 105, a sixth control valve 90 is arranged on the fifth branch 105, a sixth branch 106 is further arranged in parallel with the fifth branch 105, and a first control valve 91 is arranged on the sixth branch 106. Through the sixth branch road and first control valve and the sixth control valve that set up with fifth branch road in parallel, can control first heat exchanger effectively and carry out work in order to heat when needs, close the sixth control valve, open first control valve when not needing first heat exchanger work, form effective short circuit effect to first heat exchanger, realize multiple refrigeration and heating's switching function.
Preferably, a first flash evaporator 50 is further arranged between the first throttling device 40 and the second heat exchanger 6, an input end of the first flash evaporator 50 is communicated with the first throttling device 40, the second heat exchanger 6 is arranged on a first liquid outlet pipeline 201 of the first flash evaporator 50, the second throttling device 41 is arranged on a first gas outlet pipeline 202 of the first flash evaporator 50, and a third throttling device 42 is further arranged on a pipe section, which is positioned between the first flash evaporator 50 and the second heat exchanger 6, on the first liquid outlet pipeline 201. The first flash evaporator can effectively realize the separation between the high boiling point refrigerant and the low boiling point refrigerant plus the medium boiling point refrigerant, so that the high boiling point refrigerant is firstly separated and then enters the second heat exchanger to perform effective refrigeration and heat absorption to prepare corresponding cold energy.
Preferably, a second flash evaporator 51 is further included, the first gas outlet pipeline 202 is communicated with the input end of the second flash evaporator 51, the second throttling device 41 is arranged on the first gas outlet pipeline 202, and a second gas outlet pipeline 204 of the second flash evaporator 51 can be communicated to the third heat exchanger 7;
the second liquid outlet pipeline 203 of the second flash evaporator 51 is provided with a fourth throttling device 43, and the liquid outlet pipeline of the second flash evaporator 51 can also be communicated to the suction port of the compressor 1.
The refrigerant with the middle boiling point and the refrigerant with the low boiling point entering the first gas outlet pipeline can be further separated through the arrangement of the second flash evaporator, the refrigerant with the middle boiling point is condensed into liquid to be separated out and enters the second liquid outlet pipeline, the refrigerant with the low boiling point enters the second gas outlet pipeline, the refrigerant with the low boiling point further enters the third heat exchanger to carry out refrigeration and heat absorption, the prepared cold quantity temperature is lowest due to the highest boiling point of the refrigerant, the refrigerant with the middle boiling point is usually used for a low-temperature refrigeration house or a low-temperature freezing house and the like, and the separated refrigerant with the middle boiling point can return to a suction port of the compressor after being subjected to refrigeration and heat absorption through the outdoor heat exchanger so as to complete the whole circulation process of the system.
Preferably, a first heat recovery device 30 is further included, and the second gas outlet line 204 passes through the first heat recovery device 30, while a pipe section of the second liquid outlet line 203 between the fourth throttling device 43 and the compressor 1 passes through the first heat recovery device 30, so that the refrigerant in the second gas outlet line 204 and the refrigerant in the second liquid outlet line 203 exchange heat in the first heat recovery device 30, and the refrigerant in the second gas outlet line 204 is cooled down. The temperature of the refrigerant with low boiling point in the second gas outlet pipeline can be effectively reduced through the arrangement of the first heat-recovery device, so that the temperature of the refrigerant entering the third heat exchanger is further reduced, and the refrigerating capacity in the third heat exchanger is improved.
Preferably, a second heat regenerator 31 is further included, a pipe section of the second gas outlet pipeline 204 between the first heat regenerator 30 and the third heat exchanger 7 penetrates through the second heat regenerator 31, and a pipe section of the third heat exchanger 7 and the compressor 1 penetrates through the second heat regenerator 31, so that the refrigerant in the second gas outlet pipeline 204 and the refrigerant in the pipe section of the third heat exchanger 7 and the compressor 1 exchange heat in the second heat regenerator 31, and the refrigerant in the second gas outlet pipeline 204 is cooled. The temperature of the refrigerant with the low boiling point in the second gas outlet pipeline can be further reduced through the second heat recovery device, so that the temperature of the refrigerant entering the third heat exchanger is further reduced, the refrigerating capacity in the third heat exchanger is improved, the temperature of the refrigerant coming out of the third heat exchanger is improved, the air inlet temperature of the compressor is improved, and the phenomena of liquid impact and the like are avoided.
Preferably, a fifth throttling device 44 is further disposed on a pipe section of the second gas outlet pipeline 204 between the second heat regenerator 31 and the third heat exchanger 7, and a pipe section of the second liquid outlet pipeline 203 between the first heat regenerator 30 and the compressor 1 is communicated to a pipe section between the second heat regenerator 31 and the compressor 1. The refrigerant with the low boiling point before entering the third heat exchanger can be throttled and decompressed into a liquid state by the fifth throttling device, so that heat absorption and phase change heat exchange in the third heat exchanger are completed, and the refrigerant with the medium boiling point from the second liquid outlet pipeline can be mixed with the refrigerant with the low boiling point from the second heat regenerator and then return to the compressor.
Preferably, the first heat exchanger 2 is an electrically heated water tank; and/or, the second heat exchanger 6 is a refrigerator or an air conditioner; and/or the third heat exchanger 7 is a refrigerator. The first heat exchanger is an electric heating water tank and can produce hot water through the heat release effect of a refrigerant, the second heat exchanger is internally provided with a high-boiling-point refrigerant which can produce cold with higher temperature and can usually produce cold for refrigeration of a refrigerator or cold for an indoor air conditioner, and the third heat exchanger is internally provided with a low-boiling-point refrigerant which can produce cold with lower temperature and can be used for freezing.
The system of the invention adopts three refrigerants with different boiling points, namely high, medium and low temperature boiling point refrigerants.
Water heater, refrigerator and freezing chamber work simultaneously
As shown in fig. 1, the first control valve 91, the third control valve 93 and the fifth control valve 95 are closed, and the sixth control valve 90, the second control valve 92 and the fourth control valve 94 are opened (the control valves are preferably electrically operated valves). The three mixed non-azeotropic refrigerants are changed into high-temperature high-pressure gases in the compressor and then enter the water tank (the first heat exchanger 2), and heat is condensed in the water tank to heat low-temperature water in the water tank. The high-temperature high-pressure liquid mixed refrigerant flowing out of the tank passes through a first throttling means 40 (preferably an electronic expansion valve). The first throttling means 40 function to: through the step number of reasonable control electronic expansion valve, reduce the temperature of mixed refrigerant to reasonable scope interval for high boiling point refrigerant is appeared with liquid form, and gas-liquid mixture refrigerant flows into first flash vessel 50 afterwards, and high boiling point refrigerant is then with the liquid storage in the bottom of first flash vessel 50. The high boiling point refrigerant flows into the evaporator (second heat exchanger 6) through a third throttling device 42 (preferably an electronic expansion valve), the third throttling device 42 functioning to: the flow rate of the high boiling point refrigerant is adjusted to accommodate changes in refrigeration load. The high boiling point refrigerant evaporates and absorbs heat in the refrigerator (the second heat exchanger 6) for refrigeration, and the purpose of refrigeration is realized in the refrigerator.
The medium-low temperature boiling point refrigerant mixture flows through the second throttling device 41 (preferably an electronic expansion valve) in a gaseous state, and the second throttling device 41 has the same function as the first throttling device 40, namely, the temperature is reduced to a proper range by controlling the step number of the electromagnetic expansion valve, and the medium-temperature refrigerant and the low-temperature refrigerant are subjected to gas-liquid separation. The medium temperature boiling point refrigerant will be stored in liquid form in the bottom of the second flash vessel 51 and then flow through the first recuperator 30 through the fourth throttling means 43, preferably an electronic expansion valve. The low-temperature boiling point refrigerant condenses to release heat in the first heat recovery device 30, and the medium-temperature boiling point refrigerant evaporates to absorb heat to become gaseous in the first heat recovery device 30. The low-temperature boiling point refrigerant flows through the second heat recovery device 31, then is throttled again by a fifth throttling device (preferably an electronic expansion valve) to form a low-temperature low-pressure liquid refrigerant, and then flows into the evaporator to absorb heat and refrigerate in the refrigeration required space (the third heat exchanger 7), so that the refrigeration purpose is realized. Finally, all the refrigerant is collected in a uniform flow path and flows into the compressor through the outdoor heat exchanger 8.
The first heat recovery device 30 functions to provide a cooling source for the low-temperature refrigerant. Since the low-temperature refrigerant is hardly condensed into a liquid state with cooling water or external air, artificial energy is required. And the evaporation of the medium and high temperature boiling point refrigerants can just provide a cold source for the condensation of the low temperature boiling point refrigerants, so that the energy utilization rate is improved.
The second regenerator 31 serves to increase the superheat of the refrigerant flowing into the compressor.
The air energy water heater is suitable for load change and meets the heating capacity under different conditions, and an electric auxiliary type hot water tank is adopted.
Secondly, only the water heater is needed to work independently
As shown in fig. 2, the first control valve 91, the third control valve 93 and the fifth control valve 95 are closed, the sixth control valve 90, the second control valve 92 and the fourth control valve 94 are opened (the control valves are preferably electrically operated valves), and the third throttling device 42 and the fifth throttling device 44 are closed. The high boiling point refrigerant is stored in liquid form in the bottom of the first flash evaporator 50 and the outdoor heat exchanger 8 functions as an outdoor evaporator absorbing heat from the external environment. After the refrigerant is compressed into high-temperature and high-pressure gas by the compressor, the gas is condensed and released in the first heat exchanger 2 (preferably a water heater), then the gas is throttled into a low-temperature and low-pressure gas-liquid two-phase mixture by the electronic expansion valve (the first throttling device 40 and the second throttling device 41), the refrigerant absorbs heat by the evaporator to be in a gas state, finally the refrigerant flows into the compressor 1 to be compressed again, and then the next cycle is performed.
When only the refrigerating-freezing chamber is required to work together
As shown in fig. 3, the first control valve 91, the third control valve 93 and the fifth control valve 95 are opened, the sixth control valve 90, the second control valve 92 and the fourth control valve 94 are closed (the control valves are preferably electrically operated valves), and the refrigerant line is shown by a solid line in the figure. At this time, the outdoor heat exchanger 8 acts as an outdoor condenser, and after a refrigerant is compressed into high-temperature and high-pressure gas by a compressor, the refrigerant condenses and releases heat in the outdoor heat exchanger 8, then is throttled by an electronic expansion valve into low-temperature and low-pressure liquid, then absorbs heat in a refrigerating chamber and a freezing chamber to be refrigerated into gas, and finally flows into the compressor 1 to be compressed again for the next cycle.
In the above preferred embodiment, but all those related to the conventional refrigeration (refrigerator, air conditioner, etc.) can be realized by the refrigerating space (second heat exchanger 6), but all those related to the ultra-low temperature refrigeration (freezing, refrigerating, etc.) can be realized by the freezer (third heat exchanger 7).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a refrigeration heating integration heat transfer system which characterized in that: the method comprises the following steps:
a compressor (1) and a first heat exchanger (2), the first heat exchanger (2) being communicable with a discharge port of the compressor (1) such that refrigerant gives off heat in the first heat exchanger (2);
the refrigerant is a mixed non-azeotropic refrigerant and comprises a low boiling point refrigerant, a medium boiling point refrigerant and a high boiling point refrigerant, wherein the low boiling point refrigerant < the medium boiling point refrigerant < the high boiling point refrigerant according to the boiling point from low to high;
the refrigeration system also comprises a second heat exchanger (6), one end of the second heat exchanger (6) can be communicated to a suction port of the compressor (1), the other end of the second heat exchanger can be communicated with the first heat exchanger (2), a first throttling device (40) is further arranged between the first heat exchanger (2) and the second heat exchanger (6), and the high-boiling-point refrigerant can absorb heat in the second heat exchanger (6) to refrigerate;
the refrigeration system further comprises a third heat exchanger (7), one end of the third heat exchanger (7) can be communicated to a suction port of the compressor (1), the other end of the third heat exchanger can be communicated with the first heat exchanger (2), a second throttling device (41) is further arranged between the first heat exchanger (2) and the third heat exchanger (7), and the low-boiling-point refrigerant can absorb heat in the third heat exchanger (7) to refrigerate.
2. The integrated refrigeration and heating heat exchange system according to claim 1, wherein:
the heat exchanger further comprises an outdoor heat exchanger (8), a first branch (101) and a second branch (102), one end of the first branch (101) can be communicated with the first heat exchanger (2), the other end of the first branch can be communicated with the first throttling device (40), the first branch (101) penetrates through the outdoor heat exchanger (8) so that refrigerant passing through the first branch (101) can release heat in the outdoor heat exchanger (8), and a third control valve (93) is arranged on the first branch (101);
one end of the second branch (102) can be communicated with a suction port of the compressor (1), the other end of the second branch can be communicated with the second heat exchanger (6) or the third heat exchanger (7), the second branch (101) also penetrates through the outdoor heat exchanger (8) so that refrigerant passing through the second branch (101) can absorb heat in the outdoor heat exchanger (8), and a fourth control valve (94) is arranged on the second branch (102).
3. The integrated refrigeration and heating heat exchange system according to claim 2, wherein:
the device is characterized by further comprising a third branch (103) and a fourth branch (104), wherein the third branch (103) is connected with the first branch (101) in parallel, a second control valve (92) is arranged on the third branch (103), the fourth branch (104) is connected with the second branch (102) in parallel, and a fifth control valve (95) is arranged on the fourth branch (104).
4. The integrated refrigeration and heating heat exchange system according to any one of claims 1 to 3, wherein:
the pipeline where the first heat exchanger (2) is located is a fifth branch (105), a sixth control valve (90) is arranged on the fifth branch (105), a sixth branch (106) is further arranged in parallel with the fifth branch (105), and a first control valve (91) is arranged on the sixth branch (106).
5. The integrated refrigeration and heating heat exchange system according to any one of claims 1 to 4, wherein:
first throttling arrangement (40) with still be provided with first flash ware (50) between second heat exchanger (6), the input intercommunication of first flash ware (50) first throttling arrangement (40), set up on first liquid outlet pipeline (201) of first flash ware (50) second heat exchanger (6), set up on first gas outlet pipeline (202) of first flash ware (50) second throttling arrangement (41), just lie in on first liquid outlet pipeline (201) first flash ware (50) with still be provided with third throttling arrangement (42) on the pipe section between second heat exchanger (6).
6. The integrated refrigeration and heating heat exchange system according to claim 5, wherein:
the first gas outlet pipeline (202) is communicated with the input end of the second flash evaporator (51), the second throttling device (41) is arranged on the first gas outlet pipeline (202), and the second gas outlet pipeline (204) of the second flash evaporator (51) can be communicated to the third heat exchanger (7);
a fourth throttling device (43) is arranged on a second liquid outlet pipeline (203) of the second flash evaporator (51), and the liquid outlet pipeline of the second flash evaporator (51) can also be communicated to a suction port of the compressor (1).
7. The integrated refrigeration and heating heat exchange system according to claim 6, wherein:
the first heat recovery device (30) is further included, a section of the second gas outlet pipeline (204) which penetrates through the first heat recovery device (30) and a section of the second liquid outlet pipeline (203) which is located between the fourth throttling device (43) and the compressor (1) penetrate through the first heat recovery device (30), so that the refrigerant in the second gas outlet pipeline (204) and the refrigerant in the second liquid outlet pipeline (203) exchange heat in the first heat recovery device (30), and the refrigerant in the second gas outlet pipeline (204) is cooled.
8. The integrated refrigeration and heating heat exchange system according to claim 7, wherein:
the heat recovery device further comprises a second heat recovery device (31), a pipe section of the second gas outlet pipeline (204) between the first heat recovery device (30) and the third heat exchanger (7) penetrates through the second heat recovery device (31), and a pipe section between the third heat exchanger (7) and the compressor (1) penetrates through the second heat recovery device (31), so that refrigerant in the second gas outlet pipeline (204) and refrigerant in the pipe section between the third heat exchanger (7) and the compressor (1) exchange heat in the second heat recovery device (31), and the refrigerant in the second gas outlet pipeline (204) is cooled.
9. The integrated refrigeration and heating heat exchange system according to claim 8, wherein:
a fifth throttling device (44) is further arranged on a pipe section, positioned between the second heat recovery device (31) and the third heat exchanger (7), of the second gas outlet pipeline (204), and a pipe section, positioned between the first heat recovery device (30) and the compressor (1), of the second liquid outlet pipeline (203) is communicated to a pipe section, positioned between the second heat recovery device (31) and the compressor (1).
10. The integrated refrigeration and heating heat exchange system according to any one of claims 1 to 9, wherein:
the first heat exchanger (2) is an electric heating water tank; and/or the second heat exchanger (6) is a refrigerator or an air conditioner; and/or the third heat exchanger (7) is a refrigerator.
CN202010210064.XA 2020-03-23 2020-03-23 Refrigeration and heating integrated heat exchange system Pending CN111412687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010210064.XA CN111412687A (en) 2020-03-23 2020-03-23 Refrigeration and heating integrated heat exchange system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010210064.XA CN111412687A (en) 2020-03-23 2020-03-23 Refrigeration and heating integrated heat exchange system

Publications (1)

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CN111412687A true CN111412687A (en) 2020-07-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010210064.XA Pending CN111412687A (en) 2020-03-23 2020-03-23 Refrigeration and heating integrated heat exchange system

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112283873A (en) * 2020-10-26 2021-01-29 广东Tcl智能暖通设备有限公司 Air conditioner control method, air conditioner and storage medium
CN113865013A (en) * 2021-10-28 2021-12-31 珠海格力电器股份有限公司 Variable-load adjusting air conditioning system and control method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112283873A (en) * 2020-10-26 2021-01-29 广东Tcl智能暖通设备有限公司 Air conditioner control method, air conditioner and storage medium
CN112283873B (en) * 2020-10-26 2022-04-22 广东Tcl智能暖通设备有限公司 Air conditioner control method, air conditioner and storage medium
CN113865013A (en) * 2021-10-28 2021-12-31 珠海格力电器股份有限公司 Variable-load adjusting air conditioning system and control method thereof

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