CN103742983A - Dual-temperature refrigeration system based on non-azeotropic refrigerant, and control method for same - Google Patents

Dual-temperature refrigeration system based on non-azeotropic refrigerant, and control method for same Download PDF

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Publication number
CN103742983A
CN103742983A CN201410004322.3A CN201410004322A CN103742983A CN 103742983 A CN103742983 A CN 103742983A CN 201410004322 A CN201410004322 A CN 201410004322A CN 103742983 A CN103742983 A CN 103742983A
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China
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heat exchanger
heat
input
water
refrigeration
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CN201410004322.3A
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Chinese (zh)
Inventor
张小松
余鹏飞
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东南大学
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Priority to CN201410004322.3A priority Critical patent/CN103742983A/en
Publication of CN103742983A publication Critical patent/CN103742983A/en

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Abstract

The invention discloses a dual-temperature refrigeration system based on a non-azeotropic refrigerant, and a control method for the same, wherein the output end (1b) of the compressor (1) of the system is connected with the first input end (2a) of a four-way valve (2); the first output end (2b) of the four-way valve (2) is connected with the input end (3a) of a first heat exchanger (3); the output end (3b) of the first heat exchanger (3) is connected with the input end (4a) of a dry filter (4); the output end of the dry filter (4) is connected with the input end (5a) of a capillary I (5); the output end (5b) of the capillary I (5) is connected with the input end (8a) of a second heat exchanger (8). Relative to the traditional refrigeration system, the dual-temperature refrigeration system has the advantage that dual temperatures can be realized by one unit and two evaporators, and air temperature and air humidity can be independently processed, thus solving the problems of low overall evaporation temperature of an air conditioner, difficultly-increased energy-efficiency ratio of the air conditioner, and energy waste due to that one evaporator is used for refrigeration and dehumidification aiming at a sensible heat load and a moisture load during the refrigeration of the air conditioner.

Description

Two temp, refrigerating systems and control method thereof based on non-azeotropic refrigerant
Technical field
Different refrigeration system and the control methods thereof that realize two temperature of boiling point that the present invention relates to utilize non-azeotropic refrigerant, can be used for the device that the hot humidity load of air-conditioning system is separately processed, and belong to the technical field of refrigeration, design of air conditioning and manufacture.
Background technology
Air-conditioning system need to be lowered the temperature and dehumidify, if when conventional cold-producing medium refrigeration system adopts single evaporating temperature, utilizes the dehumidifying of freeze drying method can produce very large energy waste; And while realizing two evaporating temperatures by throttling and evaporator pressure regulator, exist again the larger problem of energy loss of refrigeration unit.
Therefore, how to realize the refrigeration system of the two temperature of a machine, during for air-conditioning, can meet low evaporating temperature dehumidifying and can meet high evaporation greenhouse cooling again, realize air-conditioner temperature and humidity is processed separately, improve the Energy Efficiency Ratio of refrigeration system and realize the energy-conservation those skilled in the art of becoming technical barrier in the urgent need to address of air-conditioning.
Summary of the invention
Technical problem: the object of this invention is to provide a kind of two temp, refrigerating systems and control method thereof based on non-azeotropic refrigerant, its cryogenic vaporizer is for the dehumidifying of air-conditioning system, and its high-temperature evaporator is for the cooling of air-conditioning system.The problem of low, the energy waste of Energy Efficiency Ratio while solving at present the too low single evaporating temperature freeze drying of refrigeration system for air-conditioning.
Technical scheme: for solving the problems of the technologies described above, the invention provides a kind of two temp, refrigerating systems based on non-azeotropic refrigerant, this system is comprised of compressor, cross valve, First Heat Exchanger, device for drying and filtering, capillary one, check valve, capillary two, the second heat exchanger, the 3rd heat exchanger, gas-liquid separator connecting pipe;
Wherein, compressor output end connects cross valve first input end, cross valve the first output termination First Heat Exchanger input, the input of First Heat Exchanger output termination device for drying and filtering, output termination capillary one input of device for drying and filtering, capillary one output termination the second heat exchanger input, the second heat exchanger output termination the 3rd heat exchanger input, the 3rd heat exchanger output termination cross valve the second input, the input of cross valve the second output termination gas-liquid separator, the output termination compressor input of gas-liquid separator.
Preferably, this system comprises refrigeration system and water system,
When working as refrigeration system, the second heat exchanger is high-temperature heat-exchanging, and the 3rd heat exchanger is cryogenic heat exchanger,
When working as water system, the second heat exchanger is cryogenic heat exchanger, and the 3rd heat exchanger is high-temperature heat-exchanging.
Preferably, the second heat exchanger is cryogenic heat exchanger, and average evaporating temperature is 5 ℃, produces 7 ℃ of chilled waters, for the treatment of air-conditioning humidity load when freeze summer; The 3rd heat exchanger is as high-temperature heat-exchanging, and average evaporating temperature is 16 ℃, produces 18 ℃ of chilled waters during refrigeration,, for the treatment of air conditioner heat, load.
The present invention also provides a kind of control method of the two temp, refrigerating systems based on non-azeotropic refrigerant, and the method comprises the steps:
During summer air-conditioning refrigeration,
Water system part: cryogenic freezing water is driven with the second heat exchanger and carried out heat exchange by the first water pump, and for the treatment of space moisture load, high temperature chilled water is by the second water pump and the 3rd heat exchanger heat exchange, for the treatment of space cooling load;
Refrigeration system part: cold-producing medium enters device for drying and filtering after being entered First Heat Exchanger condensation by compressor compression discharge by cross valve, after capillary two reducing pressure by regulating flows, enter the second heat exchanger, cold-producing medium is evaporation endothermic therein, with the heat exchange of cryogenic freezing water, refrigerant temperature enters the 3rd heat exchanger after raising, and cold-producing medium continues evaporation endothermic, with the heat exchange of high temperature chilled water, cold-producing medium enters gas-liquid separator after evaporating completely, by compressor, is sucked compression again, completes a kind of refrigeration cycle;
During winter heating,
Water system part: water is driven and the 3rd heat exchanger heat exchange by the second water pump, for the treatment of air conditioner heat load, meanwhile, water is driven and the second heat exchanger heat exchange by the first water pump, also for the treatment of air conditioner heat, loads;
Refrigeration system part, cold-producing medium by cross valve, is entered the 3rd heat exchanger by compressor compression discharge and water carries out heat exchange, then enter the second heat exchanger, carry out heat exchange with water again, then after capillary two and capillary one reducing pressure by regulating flow, enter First Heat Exchanger, cold-producing medium is evaporation endothermic therein, and refrigerant temperature enters gas-liquid separator after raising, by compressor, sucked compression again, complete one and heat circulation.
Beneficial effect:
1, during summer, adopt a unit to realize the refrigeration systems of two temperature, cryogenic vaporizer is for air conditioner dehumidification simultaneously, and high-temperature evaporator, for air-conditioning temperature-reducing, processes respectively cooling and dehumidifying, and the Energy Efficiency Ratio of refrigeration system and the economy of air-conditioning are improved greatly.
2, adopt non-azeotropic refrigerant to realize not isothermal heat exchange, reduced the heat transfer temperature difference of heat exchanger, reached energy-saving effect.
3, adopt high-temperature evaporator cooling summer, air-conditioning temperature raises has increased comfortableness.
Accompanying drawing explanation
Fig. 1 is the two temp, refrigerating system schematic diagrames that the present invention is based on non-azeotropic refrigerant.
In figure, have: compressor 1; Compressor input 1a; Compressor output end 1b; Cross valve 2; Cross valve first input end 2a; Cross valve the first output 2b; Cross valve the second input 2c; Cross valve the second output 2d; First Heat Exchanger 3; First Heat Exchanger input 3a; First Heat Exchanger output 3b; Device for drying and filtering 4; Capillary 1; Capillary one input 5a; Capillary one output 5b; Check valve 6; Capillary 27; The second heat exchanger 8; The second heat exchanger input 8a; The second heat exchanger output 8b; The 3rd heat exchange 9; The 3rd heat exchanger input 9a; The 3rd heat exchanger output 9b; Gas-liquid separator 10; Water pump 1; Water pump 2 12; Valve 13, valve 14.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Two temp, refrigerating systems based on non-azeotropic refrigerant provided by the invention, this system is comprised of compressor 1, cross valve 2, First Heat Exchanger 3, device for drying and filtering 4, capillary 1, check valve 6, capillary 27, the second heat exchanger 8, the 3rd heat exchanger 9, gas-liquid separator 10 connecting pipes;
Wherein, compressor 1 output 1b meets cross valve 2 first input end 2a, cross valve 2 first output 2b meet First Heat Exchanger 3 input 3a, First Heat Exchanger 3 output 3b meet the input 4a of device for drying and filtering 4, the output 4b of device for drying and filtering 4 meets capillary one 5 input 5a, capillary one 5 output 5b meet the second heat exchanger 8 input 8a, the second heat exchanger 8 output 8b meet the 3rd heat exchanger 9 input 9a, the 3rd heat exchanger 9 output 9b meet cross valve 2 second input 2c, cross valve 2 second output 2d connect the input of gas-liquid separator 10, the output termination compressor 1 input 1a of gas-liquid separator 10.
System comprises refrigeration system and water system,
When working as refrigeration system, the second heat exchanger 8 is cryogenic heat exchangers, and the 3rd heat exchanger 9 is high-temperature heat-exchangings,
When working as heating, the second heat exchanger 8 is high-temperature heat-exchangings, and the 3rd heat exchanger 9 is cryogenic heat exchangers.
The second heat exchanger 8 is cryogenic heat exchanger, and average evaporating temperature is 5 ℃, produces 7 ℃ of chilled waters, for the treatment of air-conditioning humidity load when freeze summer; The 3rd heat exchanger 9 is as high-temperature heat-exchanging, and average evaporating temperature is 16 ℃, produces 18 ℃ of chilled waters during refrigeration,, for the treatment of air conditioner heat, load.
The present invention also provides the control method of the two temp, refrigerating systems based on non-azeotropic refrigerant, and the method comprises the steps:
During summer air-conditioning refrigeration,
Water system part: cryogenic freezing water is driven with the second heat exchanger 9 and carried out heat exchange by the first water pump 11, and for the treatment of space moisture load, high temperature chilled water is by the second water pump 12 and the 3rd heat exchanger 10 heat exchange, for the treatment of space cooling load;
Refrigeration system part: cold-producing medium enters device for drying and filtering 4 after being entered First Heat Exchanger 3 condensations by compressor 1 compression discharge by cross valve 2, after capillary 27 reducing pressure by regulating flows, enter the second heat exchanger 8, cold-producing medium is evaporation endothermic therein, with the heat exchange of cryogenic freezing water, refrigerant temperature enters the 3rd heat exchanger 9 after raising, cold-producing medium continues evaporation endothermic, with the heat exchange of high temperature chilled water, cold-producing medium enters gas-liquid separator 10 after evaporating completely, by compressor 1, sucked compression again, complete a kind of refrigeration cycle;
During winter heating,
Water system part: water is driven and the 3rd heat exchanger 9 heat exchange by the second water pump 12, for the treatment of air conditioner heat load, meanwhile, water is driven and the second heat exchanger 8 heat exchange by the first water pump 11, also for the treatment of air conditioner heat, loads;
Refrigeration system part, cold-producing medium is entered the 3rd heat exchanger 9 by compressor 1 compression discharge by cross valve 2 and carries out heat exchange with water, then enter the second heat exchanger 8, carry out heat exchange with water again, then after capillary 27 and capillary one 5 reducing pressure by regulating flows, enter First Heat Exchanger 3, cold-producing medium is evaporation endothermic therein, and refrigerant temperature enters gas-liquid separator 10 after raising, by compressor, sucked compression again, complete one and heat circulation.
Summer, while freezing,, when air-conditioning humidity load is larger, valve 14 was opened greatly, and valve 13 is opened little, and when air conditioner heat load is larger, valve 14 is opened little, and valve 13 is opened greatly.During winter heating, when air conditioner load increases, valve 13 is opened greatly.

Claims (4)

1. two temp, refrigerating systems based on non-azeotropic refrigerant, it is characterized in that, this system is comprised of compressor (1), cross valve (2), First Heat Exchanger (3), device for drying and filtering (4), capillary one (5), check valve (6), capillary two (7), the second heat exchanger (8), the 3rd heat exchanger (9), gas-liquid separator (10) connecting pipe;
Wherein, compressor (1) output (1b) connects cross valve (2) first input end (2a), cross valve (2) first outputs (2b) connect First Heat Exchanger (3) input (3a), First Heat Exchanger (3) output (3b) connects the input (4a) of device for drying and filtering (4), the output (4b) of device for drying and filtering (4) connects capillary one (5) input (5a), capillary one (5) output (5b) connects the second heat exchanger (8) input (8a), the second heat exchanger (8) output (8b) connects the 3rd heat exchanger (9) input (9a), the 3rd heat exchanger (9) output (9b) connects cross valve (2) second inputs (2c), cross valve (2) second outputs (2d) connect the input of gas-liquid separator (10), output termination compressor (1) input (1a) of gas-liquid separator (10).
2. the two temp, refrigerating systems based on non-azeotropic refrigerant according to claim 1, is characterized in that, this system comprises refrigeration system and water system,
When working as refrigeration system, the second heat exchanger (8) is cryogenic heat exchanger, and the 3rd heat exchanger (9) is high-temperature heat-exchanging,
When working as heating, the second heat exchanger (8) is high-temperature heat-exchanging, and the 3rd heat exchanger (9) is cryogenic heat exchanger.
3. the two temp, refrigerating systems based on non-azeotropic refrigerant according to claim 2, is characterized in that, the second heat exchanger (8) is cryogenic heat exchanger, and average evaporating temperature is 5 ℃, produces 7 ℃ of chilled waters, for the treatment of air-conditioning humidity load when freeze summer; The 3rd heat exchanger (9) is as high-temperature heat-exchanging, and average evaporating temperature is 16 ℃, produces 18 ℃ of chilled waters during refrigeration, for the treatment of air conditioner heat, loads.
4. a control method for the two temp, refrigerating systems based on non-azeotropic refrigerant, is characterized in that, the method comprises the steps:
During summer air-conditioning refrigeration,
Water system part: cryogenic freezing water is driven with the second heat exchanger (9) and carried out heat exchange by the first water pump (11), for the treatment of space moisture load, high temperature chilled water is by the second water pump (12) and the 3rd heat exchanger (10) heat exchange, for the treatment of space cooling load;
Refrigeration system part: cold-producing medium enters device for drying and filtering (4) after being entered First Heat Exchanger (3) condensation by compressor (1) compression discharge by cross valve (2), after capillary two (7) reducing pressure by regulating flows, enter the second heat exchanger (8), cold-producing medium is evaporation endothermic therein, with the heat exchange of cryogenic freezing water, refrigerant temperature enters the 3rd heat exchanger (9) after raising, cold-producing medium continues evaporation endothermic, with the heat exchange of high temperature chilled water, cold-producing medium enters gas-liquid separator (10) after evaporating completely, by compressor (1), sucked compression again, complete a kind of refrigeration cycle;
During winter heating,
Water system part: water is driven and the 3rd heat exchanger (9) heat exchange by the second water pump (12), for the treatment of air conditioner heat load, meanwhile, water is driven and the second heat exchanger (8) heat exchange by the first water pump (11), also for the treatment of air conditioner heat, loads;
Refrigeration system part, cold-producing medium is entered the 3rd heat exchanger (9) by compressor (1) compression discharge by cross valve (2) and carries out heat exchange with water, then enter the second heat exchanger (8), carry out heat exchange with water again, then after capillary two (7) and capillary one (5) reducing pressure by regulating flow, enter First Heat Exchanger (3), cold-producing medium is evaporation endothermic therein, and refrigerant temperature enters gas-liquid separator (10) after raising, by compressor, sucked compression again, complete one and heat circulation.
CN201410004322.3A 2014-01-03 2014-01-03 Dual-temperature refrigeration system based on non-azeotropic refrigerant, and control method for same CN103742983A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109668381A (en) * 2018-12-13 2019-04-23 中原工学院 A kind of vacuum freezing drying device using mixed non-azeotropic refrigerant

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Publication number Priority date Publication date Assignee Title
JP2007321995A (en) * 2006-05-30 2007-12-13 Matsushita Electric Ind Co Ltd Refrigerating cycle device
CN101216225A (en) * 2008-01-11 2008-07-09 清华大学 Double temperature cold water/cold air unit
CN101251282A (en) * 2008-04-03 2008-08-27 东南大学 Water chilling unit based on hot moisture independent process as well as air-treatment method thereof
CN201218631Y (en) * 2008-05-19 2009-04-08 张茂勇 Low-temperature heat source-driven high-temperature chilled water type absorption refrigerating machine
CN101957089A (en) * 2010-09-30 2011-01-26 广东美的电器股份有限公司 Refrigerating device of air conditioner and household air conditioning system thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007321995A (en) * 2006-05-30 2007-12-13 Matsushita Electric Ind Co Ltd Refrigerating cycle device
CN101216225A (en) * 2008-01-11 2008-07-09 清华大学 Double temperature cold water/cold air unit
CN101251282A (en) * 2008-04-03 2008-08-27 东南大学 Water chilling unit based on hot moisture independent process as well as air-treatment method thereof
CN201218631Y (en) * 2008-05-19 2009-04-08 张茂勇 Low-temperature heat source-driven high-temperature chilled water type absorption refrigerating machine
CN101957089A (en) * 2010-09-30 2011-01-26 广东美的电器股份有限公司 Refrigerating device of air conditioner and household air conditioning system thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109668381A (en) * 2018-12-13 2019-04-23 中原工学院 A kind of vacuum freezing drying device using mixed non-azeotropic refrigerant

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Application publication date: 20140423