CN110173912A - A kind of the mixed working fluid compression circulatory system and working method of the recuperation of heat of band machinery - Google Patents
A kind of the mixed working fluid compression circulatory system and working method of the recuperation of heat of band machinery Download PDFInfo
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- CN110173912A CN110173912A CN201910356482.7A CN201910356482A CN110173912A CN 110173912 A CN110173912 A CN 110173912A CN 201910356482 A CN201910356482 A CN 201910356482A CN 110173912 A CN110173912 A CN 110173912A
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- recuperation
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000012530 fluid Substances 0.000 title claims abstract description 37
- 238000007906 compression Methods 0.000 title claims abstract description 17
- 230000006835 compression Effects 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 230000008569 process Effects 0.000 claims abstract description 25
- 238000009833 condensation Methods 0.000 claims abstract description 13
- 230000005494 condensation Effects 0.000 claims abstract description 13
- 238000001704 evaporation Methods 0.000 claims abstract description 9
- 230000008020 evaporation Effects 0.000 claims abstract description 8
- 239000003507 refrigerant Substances 0.000 claims description 84
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000002427 irreversible effect Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000032643 circulatory system process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The present invention relates to the present invention to provide the mixed working fluid compression circulatory system and working method of a kind of band machinery recuperation of heat, the system includes evaporator, the first compressor, condenser, the first expansion valve, gas-liquid separator, mixer, regenerator and mechanical recuperation of heat component, and working method has evaporator low pressure evaporation process, compressor compresses process, high condenser pressure condensation process and mechanical heat recycle process Four processes.Compared with prior art, the present invention after solution heat exchanger by adding mechanical recuperation of heat, solution temperature before expansion valve is further decreased while recycling heat, the high temperature heat of mechanical recuperation of heat release can be used to preheat the high temperature fluid of condenser side, by two-stage recuperation of heat, solution temperature before expansion valve can be not only reduced, to reduce the irreversible loss of throttling process, and circulation heating capacity and heat efficiency can be promoted, circulation efficiency can about promote 10-20%.
Description
Technical field
The present invention relates to cooling/heating pump technical fields, compress more particularly, to a kind of mixed working fluid of band machinery recuperation of heat
The circulatory system and working method.
Background technique
With the fast development of global economy, energy crisis environmental pollution is got worse, exploitation high-efficiency cleaning freeze/take heat
Technology becomes very urgent.Hot mode is taken as novel, heat pump is due to there are the advantages such as higher energy efficiency and simple structure feature to obtain
To extensive concern.Refrigerating/heat pump technology more mature at present is vapor compression refrigeration/heat pump techniques.
Shown in FIG. 1 is existing machinery vapor-compression cycle schematic diagram, and low-temp low-pressure liquid refrigerant is evaporating when operation
Evaporation endothermic in device, heat come from environment or industrial wastewater, and low-temperature low-pressure refrigerant steam becomes high temperature after compressor compresses
High-pressure refrigerant vapor, then condensation heat, the condensed expanded valve section of high pressure liquid refrigerant are released in condensation within the condenser
It flow back into evaporator.Mechanical vapor compression is recycled, the factors such as refrigerant, circulation and component, system energy efficiency are currently limited by
It is subject to certain restrictions, efficiency is less than 4 when such as domestic air-conditioning system winter actual motion.In order to improve cycle efficieny, applicant
It is previously proposed a kind of mixed working fluid compression circulation of carrying liqs pressurization, as shown in Fig. 2, analysis shows that the circulation is typical in winter
Efficiency under heating condition is 4.5 or so, promotes limited extent.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of band machinery recuperations of heat
The mixed working fluid compression circulatory system and working method.
The purpose of the present invention can be achieved through the following technical solutions:
The present invention provides a kind of mixed working fluid compression circulatory system of band machinery recuperation of heat, including evaporator, the first compression
Machine, condenser, the first expansion valve, gas-liquid separator, mixer, regenerator and mechanical recuperation of heat component:
The evaporator has the coolant channel for the refrigerant that circulates and the low of outer low temperature heat-transfer working medium of circulating
Warm heat-transfer working medium channel, the condenser have the coolant channel and external high temperature heat-transfer working medium for the refrigerant that circulates
High temperature heat transfer working medium passage；
By the way that the import of the refrigerant outlet of evaporator and gas-liquid separator is connected, the liquid outlet of gas-liquid separator,
The cold fluid pass of regenerator and the liquid-inlet of mixer are sequentially connected, the outlet of mixer and the refrigerant inlet of condenser
Connection constitutes the first refrigerant flow path；
By by the zone of heat liberation of the refrigerant outlet of condenser, regenerator, mechanical recuperation of heat component, the first expansion valve
It is sequentially connected with the refrigerant inlet of evaporator, constitutes second refrigerant flow path；
By the way that the gas feed of the gas vent of gas-liquid separator, the first compressor and mixer to be sequentially connected, formed
Gas refrigerant flow path.
Preferably, which further includes working medium pump, and the working medium pump is arranged between gas-liquid separator and regenerator
On first refrigerant flow path.
The present invention is added to mechanical recuperation of heat, i.e. heat pump recuperation of heat, into one while recycling heat after regenerator
Step reduces refrigerant temperature before expansion valve.The high temperature heat of mechanical recuperation of heat release can be used to preheat the high-temperature stream of condenser side
Body.
Preferably, the mechanical recuperation of heat component is used to recycle the heat of the liquid of the zone of heat liberation outflow of regenerator
Amount, and preheat the external high temperature heat-transfer working medium into the high temperature heat transfer working medium passage of condenser.
Preferably:
The mechanical recuperation of heat component includes mechanical heat regenerator, the second compressor, preheater and the second expansion valve, institute
The mechanical heat regenerator and preheater stated all have zone of heat liberation and cold fluid pass, the zone of heat liberation of mechanical heat regenerator
It is connected on second refrigerant flow path；
The cold fluid pass outlet of mechanical heat regenerator, the second compressor, the zone of heat liberation of preheater, the second expansion valve
And the cold fluid pass import of mechanical heat regenerator is sequentially connected, and constitutes third refrigerant flow path.
Preferably, the cold fluid pass of the preheater is used to pass into the high temperature heat transfer working medium passage of condenser
External heat transfer working medium.
It is including following the present invention also provides a kind of working method of the mixed working fluid of the band machinery recuperation of heat compression circulatory system
Process:
Evaporator low pressure evaporation process: cryogenic heat transfer working medium heats the refrigeration that evaporator is flowed to through second refrigerant flow path
Agent, refrigerant evaporation endothermic in evaporator constantly gasify, and corresponding saturation temperature constantly reduces, formation temperature sliding, finally
Refrigerant flow direction gas-liquid separator；
First compressor compresses process and working medium pump pressure process: the first compressor is the gaseous state system from gas-liquid separator
Cryogen is compressed into high-temperature high-pressure state from low temperature, is then transported to mixer through gas refrigerant flow path；From gas
The liquid refrigerant of liquid/gas separator through the first refrigerant flow path is transported to mixer after being pressurizeed by working medium pump；
High condenser pressure condensation process: the refrigerant after mixing condenses release condensation heat, corresponding saturation in condenser
Temperature constantly reduces, and formation temperature sliding, the heat that condensation process generates is taken away by high temperature heat transfer working medium；
Mechanical heat recycle process: the refrigerant flowed out from regenerator is the refrigerant with higher temperature, has higher temperatures
The refrigerant of degree further discharges heat in mechanical recuperation of heat component, and the low-temperature refrigerant of mechanical recuperation of heat component outflow is through first
Evaporator is flowed into after expansion valve throttling.
Preferably, the heat of mechanical recuperation of heat component release is used to preheat into the high temperature heat transfer working medium passage of condenser
External heat transfer working medium.
Refrigeration working medium of the invention is selected as non-azeotropic refrigerant etc., is not specifically limited herein.The circulatory system simultaneously
It is applicable not only to cooling condition and is also applied for heat pump working condition.
Compared with prior art, the circulatory system of the invention can effectively improve operational energy efficiency, this is mainly attributed to the present invention
Mechanical recuperation of heat is added to after regenerator, i.e. heat pump recuperation of heat is made before not only can reducing expansion valve by mechanical recuperation of heat
Refrigerant temperature to reduce the irreversible loss of throttling process, and can promote circulation heating capacity and refrigerating capacity, and circulation efficiency is about
10-20% can be promoted.
Detailed description of the invention
Fig. 1 is existing vapor-compression cycle system schematic；
Fig. 2 is that the mixed working fluid of existing carrying liqs pressurization compresses the schematic diagram of the circulatory system；
Fig. 3 is the schematic diagram of the circulatory system of the embodiment of the present invention 1.
In figure, 1 is evaporator, and 2 be the first compressor, and 3 be condenser, and 4 be the first expansion valve, and 5 be gas-liquid separator, 6
For mixer, 7 be regenerator, and 8 be working medium pump, and 9 be mechanical heat regenerator, and 10 be the second compressor, and 11 be preheater, and 12 be the
Two expansion valves, I are the first refrigerant flow path, and II is second refrigerant flow path, and III is third refrigerant flow path, and IV is gas system
Refrigerant line.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of mixed working fluid compression circulatory system of band machinery recuperation of heat, as shown in figure 3, including that evaporator 1, first compresses
Machine 2, condenser 3, the first expansion valve 4, gas-liquid separator 5, mixer 6, regenerator 7 and mechanical recuperation of heat component:
In the present embodiment, evaporator 1 has the coolant channel and circulation outer low temperature heat transfer work for the refrigerant that circulates
The cryogenic heat transfer working medium passage (i.e. low-temperature end) of matter, condenser 3 have high for the coolant channel for the refrigerant that circulates and outside
The high temperature heat transfer working medium passage (i.e. temperature end) of warm heat-transfer working medium, gas-liquid separator 5 are equipped with liquid-inlet, liquid outlet and gas
Outlet, mixer 6 are equipped with liquid-inlet, gas feed and outlet；
In the present embodiment, by the way that the refrigerant outlet of evaporator 1 is connect with the import of gas-liquid separator 5, gas-liquid separation
The liquid-inlet of the liquid outlet of device 5, the cold fluid pass of regenerator 7 and mixer 6 is sequentially connected, the outlet of mixer 6 with
The refrigerant inlet of condenser 3 connects, and constitutes the first refrigerant flow path I；By by the refrigerant outlet of condenser 3, regenerator 7
Zone of heat liberation, mechanical recuperation of heat component, the first expansion valve 4 and evaporator 1 refrigerant inlet be sequentially connected, constitute second
Refrigerant flow path II；By the way that the gas feed of the gas vent of gas-liquid separator 5, the first compressor 2 and mixer 6 is successively connected
It connects, forms gas refrigerant flow path IV.Preferably the system further includes working medium pump 8 in the present embodiment, and the setting of working medium pump 8 is in gas-liquid point
From on the first refrigerant flow path I between device 5 and regenerator 7.
Mechanical recuperation of heat component in the present embodiment is used to recycle the heat of the liquid of the zone of heat liberation outflow of regenerator 7
Amount, and preheat the external high temperature heat-transfer working medium into the high temperature heat transfer working medium passage of condenser 3.More specifically, in the present embodiment
Mechanical recuperation of heat component include mechanical heat regenerator 9, the second compressor 10, preheater 11 and the second expansion valve 12, mechanical heat
Recover 9 and preheater 11 all have zone of heat liberation and cold fluid pass, and the zone of heat liberation of mechanical heat regenerator 9 is connected to
On second refrigerant flow path II；The cold fluid pass outlet of mechanical heat regenerator 9, the second compressor 10, preheater 11 hot-fluid
The cold fluid pass import in body channel, the second expansion valve 12 and mechanical heat regenerator 9 is sequentially connected, and constitutes third refrigerant flow path
III.The cold fluid pass of preheater 11 is used to pass into the outside of the high temperature heat transfer working medium passage of condenser 3 in the present embodiment
Heat-transfer working medium.
The working method of the mixed working fluid compression circulatory system of above-mentioned band machinery recuperation of heat, including following procedure:
Evaporator low pressure evaporation process: cryogenic heat transfer working medium heats the system that evaporator 1 is flowed to through second refrigerant flow path II
Cryogen, refrigerant evaporation endothermic in evaporator 1 constantly gasify, and corresponding saturation temperature constantly reduces, formation temperature sliding, most
Refrigerant flow direction gas-liquid separator 5 afterwards；
First compressor compresses process and working medium pump pressure process: the first compressor 2 is the gaseous state from gas-liquid separator 5
Refrigerant is compressed into high-temperature high-pressure state from low temperature, is then transported to mixer 6 through gas refrigerant flow path IV；Come
Mixer 6 is transported to through the first refrigerant flow path I after the pressurization of working medium pump 8 from the liquid refrigerant of gas-liquid separator 5；
High condenser pressure condensation process: the refrigerant after mixing condenses release condensation heat, corresponding saturation in condenser 3
Temperature constantly reduces, and formation temperature sliding, the heat that condensation process generates is taken away by high temperature heat transfer working medium；
Mechanical heat recycle process: the refrigerant flowed out from regenerator 7 is the refrigerant with higher temperature, has higher temperatures
The refrigerant of degree further discharges heat in mechanical recuperation of heat component, and the low-temperature refrigerant of mechanical recuperation of heat component outflow is through first
Evaporator 1 is flowed into after the throttling of expansion valve 4.
In the present embodiment, the heat of mechanical recuperation of heat component release is used to preheat the high temperature heat transfer working medium into condenser 3
The external heat transfer working medium in channel.
Using non-azeotropic refrigerant R32/R123, it is assumed that outdoor air is in evaporator (cryogenic heat transfer working medium) out temperature
It is 7 DEG C and 2 DEG C respectively；Outdoor air is 20 DEG C and 35 DEG C respectively in condenser (high temperature heat transfer working medium) out temperature.Accordingly
Calculated result it is as shown in table 1.The efficiency of the circulatory system of the invention is up to 5.0, steams much higher than tradition machinery under identical operating condition
The mixed working fluid compression circulatory system of efficiency and the carrying liqs pressurization of air pressure contracting cooling cycle system (shown in Fig. 1) is (such as Fig. 2 institute
Show).
The comparison of 1 cycle performance of table
The above-mentioned description to embodiment is for ease of ordinary skill in the art to understand and use the invention.It is ripe
The personnel for knowing art technology obviously easily can make various modifications to these embodiments, and general original described herein
It ought to use in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, this field
Technical staff's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be in guarantors of the invention
Within the scope of shield.
Claims (7)
1. a kind of mixed working fluid of band machinery recuperation of heat compresses the circulatory system, which is characterized in that including evaporator (1), the first pressure
Contracting machine (2), condenser (3), the first expansion valve (4), gas-liquid separator (5), mixer (6), regenerator (7) and mechanical recuperation of heat
Component:
The evaporator (1) has the low temperature of coolant channel and circulation outer low temperature heat-transfer working medium for the refrigerant that circulates
Heat-transfer working medium channel, the condenser (3) have the coolant channel and external high temperature heat-transfer working medium for the refrigerant that circulates
High temperature heat transfer working medium passage；
By the way that the refrigerant outlet of evaporator (1) is connect with the import of gas-liquid separator (5), the liquid of gas-liquid separator (5)
The liquid-inlet of outlet, the cold fluid pass of regenerator (7) and mixer (6) is sequentially connected, the outlet and condensation of mixer (6)
The refrigerant inlet of device (3) connects, and constitutes the first refrigerant flow path (I)；
By the way that the zone of heat liberation of the refrigerant outlet of condenser (3), regenerator (7), mechanical recuperation of heat component, first are expanded
The refrigerant inlet of valve (4) and evaporator (1) is sequentially connected, and is constituted second refrigerant flow path (II)；
By the way that the gas feed of the gas vent of gas-liquid separator (5), the first compressor (2) and mixer (6) is sequentially connected,
It is formed gas refrigerant flow path (IV).
2. a kind of mixed working fluid of band machinery recuperation of heat according to claim 1 compresses the circulatory system, which is characterized in that should
System further includes working medium pump (8), the first system that the working medium pump (8) is arranged between gas-liquid separator (5) and regenerator (7)
On refrigerant line (I).
3. a kind of mixed working fluid of band machinery recuperation of heat according to claim 1 compresses the circulatory system, which is characterized in that institute
The mechanical recuperation of heat component stated is used to recycle the heat of the liquid of the zone of heat liberation outflow of regenerator (7), and preheats into cold
The external high temperature heat-transfer working medium of the high temperature heat transfer working medium passage of condenser (3).
4. a kind of mixed working fluid of band machinery recuperation of heat according to claim 1 or 3 compresses the circulatory system, feature exists
In:
The mechanical recuperation of heat component includes that mechanical heat regenerator (9), the second compressor (10), preheater (11) and second are swollen
Swollen valve (12), the mechanical heat regenerator (9) and preheater (11) all have zone of heat liberation and cold fluid pass, mechanical heat
The zone of heat liberation of recover (9) is connected on second refrigerant flow path (II)；
The cold fluid pass outlet of mechanical heat regenerator (9), the zone of heat liberation of the second compressor (10), preheater (11),
The cold fluid pass import of two expansion valves (12) and mechanical heat regenerator (9) is sequentially connected, and constitutes third refrigerant flow path
(III)。
5. a kind of mixed working fluid of band machinery recuperation of heat according to claim 4 compresses the circulatory system, which is characterized in that institute
The cold fluid pass for the preheater (11) stated is used to pass into the external heat transfer work of the high temperature heat transfer working medium passage of condenser (3)
Matter.
6. the working method of the mixed working fluid compression circulatory system with mechanical recuperation of heat as described in Claims 1 to 5 is any,
It is characterized in that, including following procedure:
Evaporator low pressure evaporation process: cryogenic heat transfer working medium heats the system that evaporator (1) is flowed to through second refrigerant flow path (II)
Cryogen, refrigerant evaporation endothermic in evaporator (1) constantly gasify, and corresponding saturation temperature constantly reduces, formation temperature sliding,
Last refrigerant flow direction gas-liquid separator (5)；
First compressor compresses process and working medium pump pressure process: the first compressor (2) is the gaseous state for coming from gas-liquid separator (5)
Refrigerant is compressed into high-temperature high-pressure state from low temperature, is then transported to mixer through gas refrigerant flow path (IV)
(6)；Liquid refrigerant from gas-liquid separator (5) is transported to mixed through the first refrigerant flow path (I) after being pressurizeed by working medium pump (8)
Clutch (6)；
High condenser pressure condensation process: the refrigerant after mixing condenses release condensation heat, corresponding saturation temperature in condenser (3)
Degree constantly reduces, and formation temperature sliding, the heat that condensation process generates is taken away by high temperature heat transfer working medium；
Mechanical heat recycle process: the refrigerant flowed out from regenerator (7) is the refrigerant with higher temperature, has higher temperature
Refrigerant further discharge heat in mechanical recuperation of heat component, the low-temperature refrigerant of mechanical recuperation of heat component outflow is swollen through first
Evaporator (1) is flowed into after swollen valve (4) throttling.
7. the working method of the mixed working fluid compression circulatory system of band machinery recuperation of heat according to claim 6, feature
It is, the heat of mechanical recuperation of heat component release is used to preheat to be passed into the external of the high temperature heat transfer working medium passage of condenser (3)
Hot working fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910356482.7A CN110173912B (en) | 2019-04-29 | 2019-04-29 | Mixed working medium compression circulation system with mechanical heat recovery function and working method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910356482.7A CN110173912B (en) | 2019-04-29 | 2019-04-29 | Mixed working medium compression circulation system with mechanical heat recovery function and working method |
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| CN110173912A true CN110173912A (en) | 2019-08-27 |
| CN110173912B CN110173912B (en) | 2020-10-02 |
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| CN201910356482.7A Expired - Fee Related CN110173912B (en) | 2019-04-29 | 2019-04-29 | Mixed working medium compression circulation system with mechanical heat recovery function and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503915A (en) * | 2020-05-08 | 2020-08-07 | 北京国家速滑馆经营有限责任公司 | Carbon dioxide refrigerating system for ice rink |
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| CN201096429Y (en) * | 2007-07-26 | 2008-08-06 | 张宪金 | Compact highly effective dual-operation cooling tower heat reclamation energy-saving device |
| CN101526279A (en) * | 2009-03-31 | 2009-09-09 | 西安交通大学 | Cold recovery double-mode overlapping low-temperature refrigerator |
| JP4336619B2 (en) * | 2004-05-20 | 2009-09-30 | ヤンマー株式会社 | Engine heat pump |
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| CN106871473A (en) * | 2017-04-09 | 2017-06-20 | 上海海洋大学 | A kind of single machine compression with double stage refrigeration system with waste-heat recovery device |
| CN109269132A (en) * | 2018-07-16 | 2019-01-25 | 同济大学 | A kind of mixed working fluid compression circulatory system of carrying liqs boost-up circuit |
-
2019
- 2019-04-29 CN CN201910356482.7A patent/CN110173912B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87101531A (en) * | 1987-04-06 | 1988-10-19 | 张洪玉 | Energy saving refrigeration installation for miniature cold storage |
| JP4336619B2 (en) * | 2004-05-20 | 2009-09-30 | ヤンマー株式会社 | Engine heat pump |
| CN1632419A (en) * | 2004-12-28 | 2005-06-29 | 华南理工大学 | Self-folding type air source heat pump water heater |
| CN101668998A (en) * | 2007-02-02 | 2010-03-10 | 开利公司 | Enhanced refrigerant system |
| CN201096429Y (en) * | 2007-07-26 | 2008-08-06 | 张宪金 | Compact highly effective dual-operation cooling tower heat reclamation energy-saving device |
| CN101526279A (en) * | 2009-03-31 | 2009-09-09 | 西安交通大学 | Cold recovery double-mode overlapping low-temperature refrigerator |
| CN102829572A (en) * | 2012-09-06 | 2012-12-19 | 昆山一恒仪器有限公司 | Energy-saving ultralow-temperature preservation box |
| CN106871473A (en) * | 2017-04-09 | 2017-06-20 | 上海海洋大学 | A kind of single machine compression with double stage refrigeration system with waste-heat recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503915A (en) * | 2020-05-08 | 2020-08-07 | 北京国家速滑馆经营有限责任公司 | Carbon dioxide refrigerating system for ice rink |
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| CN110173912B (en) | 2020-10-02 |
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