CN110057124A - A kind of part superposition type quotient is super to use CO2Trans-critical cycle double-stage compressive refrigerating system - Google Patents
A kind of part superposition type quotient is super to use CO2Trans-critical cycle double-stage compressive refrigerating system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-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
- F24F5/0096—Air-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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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Abstract
本发明公开了一种部分复叠式商超用CO2跨临界双级压缩制冷系统。本发明的部分复叠过冷制冷系统制冷剂液体依次通过管路进入压缩机、冷凝器、节流阀和冷却蒸发器完成制冷，用于过冷所述CO2跨临界双级压缩制冷系统，增大制冷量，提高系统性能；本发明的CO2跨临界双级压缩制冷系统包括低温蒸发器、中温蒸发器、低温压缩机、高温压缩机、并行压缩机、热水加热器、空气换热器、气体冷却器、冷却蒸发器、高压节流阀、空调、中间冷却器器、旁通阀、中压节流阀、低压节流阀。两系统相耦合可实现商用超市多种制冷制热需求的组合，解决了商超制冷系统用CO2制冷剂性能系数低的问题，同时保证了系统的安全性，有效提高能源的利用效率。
The invention discloses a partially cascaded CO 2 transcritical double-stage compression refrigeration system for commercial supermarkets. The refrigerant liquid of the partial cascade subcooling refrigeration system of the present invention enters the compressor, the condenser, the throttle valve and the cooling evaporator sequentially through the pipeline to complete the refrigeration, and is used for subcooling the CO2 transcritical two -stage compression refrigeration system, Increase refrigeration capacity and improve system performance; the CO 2 transcritical two-stage compression refrigeration system of the present invention includes a low temperature evaporator, a medium temperature evaporator, a low temperature compressor, a high temperature compressor, a parallel compressor, a hot water heater, and an air heat exchange. Cooler, gas cooler, cooling evaporator, high pressure throttle valve, air conditioner, intercooler, bypass valve, medium pressure throttle valve, low pressure throttle valve. The coupling of the two systems can realize the combination of various cooling and heating needs of commercial supermarkets, solve the problem of low performance coefficient of CO 2 refrigerant used in the supermarket refrigeration system, ensure the safety of the system, and effectively improve the efficiency of energy utilization.
Description
技术领域technical field
本发明涉及制冷技术领域，具体涉及一种部分复叠过冷式商超用CO2双级压缩制冷系统。The invention relates to the technical field of refrigeration, in particular to a partially cascaded subcooled CO 2 double-stage compression refrigeration system for commercial supermarkets.
背景技术Background technique
近年来为应对环境安全问题，在国际社会的共同努力下，发达国家和部分发展中国家做出了相应的承诺来控制臭氧层破坏和温室效应，其中高“ODP”和高“GWP”制冷剂的生产和应用受到了严格的限制。目前，大量使用的HCFC类制冷剂将在2030年前削减至维修保养量，部分HFC类制冷剂可能会成为中间过渡产品。研究人员总结，解决制冷剂应用的技术方案有两条技术路线，第一条技术路线是继续研发零“ODP”和低“GWP”的人工制冷剂(例如R1234yf，R1234ze)，另一条路线是采用自然制冷剂(例如NH3、CO2、丙烷、水等)。大家得到共识的是，自然制冷剂在今后的制冷应用中将成为主流，尤其是NH3、CO2、丙烷、水等制冷剂将在未来制冷系统中将得到广泛应用。目前在商用超市制冷领域，CO2跨临界增压系统已成为一些欧洲国家新设备的标准超市制冷解决方案。In recent years, in order to deal with environmental security issues, with the joint efforts of the international community, developed countries and some developing countries have made corresponding commitments to control the destruction of the ozone layer and the greenhouse effect. Among them, high "ODP" and high "GWP" refrigerants Production and application are severely restricted. At present, the HCFC-based refrigerants used in large quantities will be reduced to the maintenance and maintenance amount by 2030, and some HFC-based refrigerants may become intermediate products. The researchers concluded that there are two technical routes to solve the technical solution of refrigerant applications. The first technical route is to continue to develop artificial refrigerants with zero "ODP" and low "GWP" (such as R1234yf, R1234ze), and the other route is to use Natural refrigerants (eg NH3 , CO2 , propane, water, etc.). The consensus is that natural refrigerants will become the mainstream in future refrigeration applications, especially NH 3 , CO 2 , propane, water and other refrigerants will be widely used in future refrigeration systems. At present, in the field of commercial supermarket refrigeration, CO 2 transcritical booster system has become the standard supermarket refrigeration solution for new equipment in some European countries.
CO2作为制冷剂使用有其优点和缺点，其优点是特别适合用于热泵热水器的应用工况，可实现热水的即时加热，出水温度可达到55～65℃，甚至可以实现更高温度。但其缺点也非常鲜明，制冷系统效率低、系统运行压力高，当然运行压力高的问题可以通过在设备加工过程中提高压力容器承压能力来解决，而系统运行效率低的问题则不能通过自身在解决，需要对CO2制冷热泵系统进行改进才能提高效率。The use of CO 2 as a refrigerant has its advantages and disadvantages. The advantage is that it is especially suitable for the application of heat pump water heaters, which can realize instant heating of hot water, and the outlet water temperature can reach 55-65 ℃, and even higher temperatures can be achieved. However, its shortcomings are also very obvious, such as low refrigeration system efficiency and high system operating pressure. Of course, the problem of high operating pressure can be solved by improving the pressure-bearing capacity of the pressure vessel during equipment processing, while the problem of low system operating efficiency cannot be solved by itself. In addressing the need for improvements in CO2 refrigeration heat pump systems to increase efficiency.
发明内容SUMMARY OF THE INVENTION
本发明所要解决的技术问题是：提供一种部分复叠式商超用CO2跨临界双级压缩制冷系统，解决现有技术中能源利用率低，系统效率低等问题。The technical problem to be solved by the present invention is to provide a partially cascaded CO 2 transcritical two-stage compression refrigeration system for commercial supermarkets, which solves the problems of low energy utilization rate and low system efficiency in the prior art.
为解决以上技术问题，本发明采用以下技术方案：In order to solve the above technical problems, the present invention adopts the following technical solutions:
一种部分复叠式商超用CO2跨临界双级压缩制冷系统，其特征在于，所述制冷系统包括部分复叠过冷制冷系统和CO2跨临界双级压缩制冷系统；A partially cascaded CO 2 transcritical two-stage compression refrigeration system for commercial supermarkets, characterized in that the refrigeration system comprises a partially cascaded sub-cooling refrigeration system and a CO 2 transcritical two-stage compression refrigeration system;
所述部分复叠过冷制冷系统为单级蒸气压缩式制冷系统，制冷剂液体依次通过管路进入压缩机、冷凝器、节流阀和冷却蒸发器完成制冷；The partial cascade subcooling refrigeration system is a single-stage vapor compression refrigeration system, and the refrigerant liquid enters the compressor, the condenser, the throttle valve and the cooling evaporator through the pipeline in turn to complete the refrigeration;
所述CO2跨临界双级压缩制冷系统包括低温蒸发器、中温蒸发器、低温压缩机、高温压缩机、并行压缩机、热水加热器、空气换热器、气体冷却器、冷却蒸发器、高压节流阀、空调、中间冷却器、旁通阀、中压节流阀、低压节流阀，所述低温蒸发器与低温压缩机串联连接后与中温蒸发器并联连接，并行压缩机与高温压缩机并联连接，随后依次串联连接热水加热器、空气换热器、气体冷却器、冷却蒸发器、高压节流阀、空调、中间冷却器入口，中间冷却器出口通过管路一路连接并行压缩机进气口，另一路通过旁通阀连接高温压缩机进气口，所述低压节流阀串接在低温蒸发器与中间冷却器之间，所述中压节流阀串接在中温蒸发器于中间冷却器之间；气体冷却器的制冷剂出口通过管路连接冷却蒸发器的制冷剂入口，冷却蒸发器的制冷剂出口通过管路连接高压节流阀，部分复叠过冷制冷系统和CO2跨临界双级压缩制冷系统通过所述冷却蒸发器耦合在一起。The CO transcritical two -stage compression refrigeration system includes a low temperature evaporator, a medium temperature evaporator, a low temperature compressor, a high temperature compressor, a parallel compressor, a hot water heater, an air heat exchanger, a gas cooler, a cooling evaporator, High pressure throttle valve, air conditioner, intercooler, bypass valve, medium pressure throttle valve, low pressure throttle valve, the low temperature evaporator is connected in series with the low temperature compressor and then connected in parallel with the medium temperature evaporator, and the parallel compressor is connected with the high temperature The compressors are connected in parallel, and then the hot water heater, air heat exchanger, gas cooler, cooling evaporator, high-pressure throttle valve, air conditioner, and inlet of the intercooler are connected in series in sequence, and the outlet of the intercooler is connected by pipelines and compressed in parallel. The other is connected to the air inlet of the high temperature compressor through the bypass valve. The low pressure throttle valve is connected in series between the low temperature evaporator and the intercooler, and the medium pressure throttle valve is connected in series with the medium temperature evaporator. The refrigerant outlet of the gas cooler is connected to the refrigerant inlet of the cooling evaporator through a pipeline, and the refrigerant outlet of the cooling evaporator is connected to a high-pressure throttle valve through a pipeline, partially overlapping the subcooling refrigeration system. and CO 2 transcritical two-stage compression refrigeration system coupled together through the cooling evaporator.
在无特殊需求时，所述低温压缩机吸入所述低温蒸发器出口的制冷剂蒸汽，等熵压缩到中间压力，再进入所述中温压缩机等熵压缩到高温高压过热状态；随后进入所述气体冷却器等压冷却，为增大制冷量，采用所述部分复叠过冷制冷系统对所述气体冷却器出口制冷剂过冷；再进入所述高压节流阀绝热节流，降温降压；接着进入所述中间冷却器进行气液分离，由于闪气旁通一路中的旁通阀处于常闭状态，分离的制冷剂饱和蒸汽全部进入所述并行压缩机在较高压力下进行等熵压缩，所述并行压缩机出口制冷剂与所述中温压缩机出口制冷剂混合后进入所述气体冷却器；中间冷却器分离的制冷剂饱和液体一部分经过所述中压节流阀绝热节流到中间压力；再进入到所述中温蒸发器吸热等压蒸发，蒸发后的制冷剂蒸汽也与所述低温压缩机出口的制冷剂过热蒸汽混合进入所述中温压缩机；分离出的另一部分制冷剂饱和液体经过所述低压节流阀绝热节流到低温低压状态，进入所述低温蒸发器等压蒸发，再次进入所述低温压缩机完成循环。When there is no special requirement, the low-temperature compressor sucks the refrigerant vapor at the outlet of the low-temperature evaporator, isentropically compressed to an intermediate pressure, and then enters the intermediate-temperature compressor isentropically compressed to a high-temperature, high-pressure superheated state; and then enters the The gas cooler is isobarically cooled. In order to increase the cooling capacity, the partially cascaded subcooling refrigeration system is used to supercool the refrigerant at the outlet of the gas cooler; ; Then enter the intercooler for gas-liquid separation, because the bypass valve in the flash gas bypass channel is in a normally closed state, all the separated refrigerant saturated vapor enters the parallel compressor for isentropic under higher pressure Compressed, the refrigerant at the outlet of the parallel compressor is mixed with the refrigerant at the outlet of the intermediate temperature compressor and then enters the gas cooler; a part of the refrigerant saturated liquid separated by the intercooler is adiabatically throttled to the intermediate pressure throttle valve. Intermediate pressure; then enter the medium temperature evaporator to absorb heat and isobaric evaporation, and the evaporated refrigerant vapor is also mixed with the refrigerant superheated vapor at the outlet of the low temperature compressor to enter the medium temperature compressor; another part of the separated refrigeration The agent-saturated liquid is adiabatically throttled to a low-temperature and low-pressure state through the low-pressure throttle valve, enters the low-temperature evaporator for isobaric evaporation, and enters the low-temperature compressor again to complete the cycle.
同时有供冷、供热水需求时，所述气体冷却器前的所述热水加热器开启，制冷剂在所述热水加热器中放出一部分热量，实现供热水需求。When there is a demand for cooling and hot water at the same time, the hot water heater in front of the gas cooler is turned on, and the refrigerant releases a part of heat in the hot water heater to meet the demand for hot water.
同时有供冷、空间供暖需求时，开启所述气体冷却器前的所述空气换热器，制冷剂在所述空气换热器中放出热量实现空间供暖需求。When there is demand for cooling and space heating at the same time, the air heat exchanger before the gas cooler is turned on, and the refrigerant releases heat in the air heat exchanger to meet the space heating demand.
同时有供冷、空调供冷需求时，开启所述中间冷却器前的所述空调，制冷剂在所述空调中吸收热量实现空调供冷需求。When there is a demand for cooling and an air conditioner at the same time, the air conditioner before the intercooler is turned on, and the refrigerant absorbs heat in the air conditioner to meet the cooling demand of the air conditioner.
同时有供冷、供热水、空间供暖需求时，开启所述气体冷却器前的所述热水加热器和所述空气换热器，制冷剂所述高压压缩机出来依次通过所述热水加热器和所述空气换热器放热同时实现供热水、空间供暖需求。When there is demand for cooling, hot water, and space heating at the same time, the hot water heater and the air heat exchanger before the gas cooler are turned on, and the refrigerant from the high-pressure compressor passes through the hot water in sequence. The heater and the air heat exchanger release heat while meeting the demands of hot water supply and space heating.
同时有供冷、供热水、空调制冷需求时，开启所述气体冷却器前的所述热水加热器和所述中间冷却器前的所述空调，制冷剂所述高压压缩机出来依次通过所述热水加热器、所述气体冷却器、所述高压节流阀和所述空调，在所述热水加热器中放出一部分热量，在所述空调中吸收一部分热量，同时实现供热水、空调制冷需求。When there is demand for cooling, hot water, and air conditioning at the same time, the hot water heater before the gas cooler and the air conditioner before the intercooler are turned on, and the refrigerant comes out of the high-pressure compressor and passes through in sequence The hot water heater, the gas cooler, the high-pressure throttle valve and the air conditioner emit a part of the heat in the hot water heater, absorb a part of the heat in the air conditioner, and simultaneously supply hot water , Air conditioning and refrigeration needs.
与现有技术相比，本发明的有益效果是：Compared with the prior art, the beneficial effects of the present invention are:
1)本发明所述部分复叠过冷制冷系统和所述并行压缩机应用于商超制冷系统中，实现了所述CO2跨临界双级压缩系统的过冷，增大了制冷量，提高了系统的安全性，解决了传统CO2跨临界双级压缩系统性能系数低的问题，节能、环保且经济效益显著，符合经济与社会的可持续性发展战略。1) The partial cascade subcooling refrigeration system and the parallel compressor of the present invention are applied to the commercial super refrigeration system, which realizes the supercooling of the CO 2 transcritical two-stage compression system, increases the refrigeration capacity, and improves the cooling capacity. It improves the safety of the system and solves the problem of low coefficient of performance of the traditional CO 2 transcritical two-stage compression system.
2)本发明的制冷系统提供两种不同的蒸发温度，分别为低温和中温，满足超市不同的储存需求，且集成了热水供应、空间供暖系统，使超市系统结构更加紧凑。集成解决方案需要更少的组件和更少的制冷剂，这有助于节省空间资源，方便系统的维护维修。2) The refrigeration system of the present invention provides two different evaporation temperatures, namely low temperature and medium temperature, to meet different storage requirements of supermarkets, and integrates hot water supply and space heating systems to make the supermarket system more compact. An integrated solution requires fewer components and less refrigerant, which helps save space resources and facilitate system maintenance.
3)本发明的制冷系统在制冷的同时，可对冷凝热进行回收，达到节能的目的。3) The refrigeration system of the present invention can recover condensation heat while refrigerating, so as to achieve the purpose of energy saving.
4)本发明采用CO2跨临界双级压缩系统解决了单级压缩系统因压比过大而引起压缩终了过热蒸气的温度高，从而导致输气系数、单位制冷量、单位容积制冷量、制冷系数均下降以及压缩机功耗增加、润滑油炭化等一系列问题。使系统具有较低的能源使用费，节约了超市运营成本。4) The present invention adopts the CO 2 transcritical two-stage compression system to solve the problem that the temperature of the superheated vapor at the end of the compression caused by the excessive pressure ratio of the single-stage compression system is high, thereby causing the gas transmission coefficient, unit refrigeration capacity, unit volume refrigeration capacity, and refrigeration. A series of problems such as the decrease of the coefficient and the increase of the power consumption of the compressor and the carbonization of the lubricating oil. The system has a lower energy usage fee and saves the operating cost of the supermarket.
附图说明Description of drawings
图1所示为本发明的原理图。Figure 1 shows a schematic diagram of the present invention.
具体实施方式Detailed ways
以下结合附图和具体实施例对本发明作进一步详细说明。The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
本发明部分复叠式商超用CO2跨临界双级压缩制冷系统原理图如图1所示，所述制冷系统包括部分复叠过冷制冷系统和CO2跨临界双级压缩制冷系统。The schematic diagram of the partially cascaded CO 2 transcritical two -stage compression refrigeration system for commercial supermarkets of the present invention is shown in FIG.
所述部分复叠过冷制冷系统为单级蒸气压缩式制冷系统，制冷剂液体依次通过管路进入压缩机14、冷凝器15、节流阀16和冷却蒸发器7完成制冷；The partial cascade subcooling refrigeration system is a single-stage vapor compression refrigeration system, and the refrigerant liquid enters the compressor 14, the condenser 15, the throttle valve 16 and the cooling evaporator 7 through the pipeline in turn to complete the refrigeration;
所述CO2跨临界双级压缩制冷系统包括低温蒸发器13、中温蒸发器11、低温压缩机1、高温压缩机2、并行压缩机3、热水加热器4、空气换热器5、气体冷却器6、冷却蒸发器7、高压节流阀8、空调15、中间冷却器9、旁通阀14、中压节流阀10、低压节流阀12，所述低温蒸发器13与低温压缩机1串联连接后与中温蒸发器11并联连接，并行压缩机3与高温压缩机2并联连接，随后依次串联连接热水加热器4、空气换热器5、气体冷却器6、冷却蒸发器7、高压节流阀8、空调15、中间冷却器9入口，中间冷却器9出口通过管路一路连接并行压缩机3进气口，另一路通过旁通阀14连接中温压缩机进气口，所述低压节流阀12串接在低温蒸发器13与中间冷却器9之间，所述中压节流阀10串接在中温蒸发器11于中间冷却器9之间；气体冷却器6的制冷剂出口通过管路连接冷却蒸发器7的制冷剂入口，冷却蒸发器7的制冷剂出口通过管路连接高压节流阀8，部分复叠过冷制冷系统和CO2跨临界双级压缩制冷系统通过所述冷却蒸发器7耦合在一起。The CO2 transcritical two -stage compression refrigeration system includes a low temperature evaporator 13, a medium temperature evaporator 11, a low temperature compressor 1, a high temperature compressor 2, a parallel compressor 3, a hot water heater 4, an air heat exchanger 5, a gas Cooler 6, cooling evaporator 7, high pressure throttle valve 8, air conditioner 15, intercooler 9, bypass valve 14, medium pressure throttle valve 10, low pressure throttle valve 12, the low temperature evaporator 13 and the low temperature compressor After the machine 1 is connected in series, it is connected in parallel with the medium temperature evaporator 11, the parallel compressor 3 is connected in parallel with the high temperature compressor 2, and then the hot water heater 4, the air heat exchanger 5, the gas cooler 6, and the cooling evaporator 7 are connected in series in sequence. , the high pressure throttle valve 8, the air conditioner 15, the inlet of the intercooler 9, the outlet of the intercooler 9 is connected to the air inlet of the parallel compressor 3 through a pipeline, and the other is connected to the air inlet of the intermediate temperature compressor through the bypass valve 14, so The low pressure throttle valve 12 is connected in series between the low temperature evaporator 13 and the intercooler 9, and the medium pressure throttle valve 10 is connected in series between the medium temperature evaporator 11 and the intercooler 9; the refrigeration of the gas cooler 6 The refrigerant outlet is connected to the refrigerant inlet of the cooling evaporator 7 through a pipeline, and the refrigerant outlet of the cooling evaporator 7 is connected to the high-pressure throttle valve 8 through a pipeline. Part of the cascade subcooling refrigeration system and the CO2 transcritical two -stage compression refrigeration system The cooling evaporators 7 are coupled together.
在无特殊需求时，所述低温压缩机1吸入所述低温蒸发器13出口的制冷剂蒸汽，等熵压缩到中间压力，再进入所述中温压缩机2等熵压缩到高温高压过热状态；随后进入所述气体冷却器6等压冷却，为增大制冷量，采用所述部分复叠过冷制冷系统对所述气体冷却器6出口制冷剂过冷；再进入所述高压节流阀8绝热节流，降温降压；接着进入所述中间冷却器9进行气液分离，由于闪气旁通一路中的旁通阀14处于常闭状态，分离的制冷剂饱和蒸汽进入所述并行压缩机3在较高压力下进行等熵压缩，所述并行压缩机3出口制冷剂与所述中温压缩机2出口制冷剂混合后进入所述气体冷却器6；中间冷却器9分离的制冷剂饱和液体一部分经过所述中压节流阀10绝热节流到中间压力；再进入到所述中温蒸发器11吸热等压蒸发，蒸发后的制冷剂蒸汽也与所述低温压缩机1出口的制冷剂过热蒸汽混合进入所述中温压缩机2；分离出的另一部分制冷剂饱和液体经过所述低压节流阀12绝热节流到低温低压状态，进入所述低温蒸发器13等压蒸发，再次进入所述低温压缩机1完成循环。In the absence of special requirements, the low-temperature compressor 1 inhales the refrigerant vapor at the outlet of the low-temperature evaporator 13, isentropically compressed to an intermediate pressure, and then enters the intermediate-temperature compressor 2 isentropically compressed to a high-temperature, high-pressure superheated state; Enter the gas cooler 6 for isobaric cooling, in order to increase the cooling capacity, the partial cascade subcooling refrigeration system is used to supercool the refrigerant at the outlet of the gas cooler 6; and then enter the high-pressure throttle valve 8 for thermal insulation Throttle, reduce temperature and pressure; then enter the intercooler 9 for gas-liquid separation, because the bypass valve 14 in the flash gas bypass channel is in a normally closed state, the separated refrigerant saturated vapor enters the parallel compressor 3 Isentropic compression is performed at a higher pressure, the refrigerant at the outlet of the parallel compressor 3 is mixed with the refrigerant at the outlet of the intermediate temperature compressor 2 and then enters the gas cooler 6; a part of the refrigerant saturated liquid separated by the intercooler 9 Adiabatic throttling to the intermediate pressure through the medium-pressure throttle valve 10; and then entering the medium-temperature evaporator 11 to absorb heat and isobaric evaporation, and the evaporated refrigerant vapor is also superheated with the refrigerant at the outlet of the low-temperature compressor 1. The steam is mixed into the medium temperature compressor 2; another part of the separated refrigerant saturated liquid is adiabatically throttled to a low temperature and low pressure state through the low pressure throttle valve 12, enters the low temperature evaporator 13 for isobaric evaporation, and enters the Cryogenic compressor 1 completes the cycle.
同时有供冷、供热水需求时，所述气体冷却器6前的所述热水加热器4开启，制冷剂在所述热水加热器4中放出一部分热量，实现供热水需求。When there is demand for cooling and hot water supply at the same time, the hot water heater 4 in front of the gas cooler 6 is turned on, and the refrigerant releases a part of heat in the hot water heater 4 to meet the hot water supply demand.
同时有供冷、空间供暖需求时，开启所述气体冷却器6前的所述空气换热器5，制冷剂在所述空气换热器5中放出热量实现空间供暖需求。When there is demand for cooling and space heating at the same time, the air heat exchanger 5 before the gas cooler 6 is turned on, and the refrigerant releases heat in the air heat exchanger 5 to meet the space heating demand.
同时有供冷、空调供冷需求时，开启所述中间冷却器9前的所述空调15，制冷剂在所述空调15中吸收热量实现空调供冷需求。When there is a demand for cooling and an air conditioner at the same time, the air conditioner 15 before the intercooler 9 is turned on, and the refrigerant absorbs heat in the air conditioner 15 to meet the air conditioner cooling demand.
同时有供冷、供热水、空间供暖需求时，开启所述气体冷却器6前的所述热水加热器4和所述空气换热器5，制冷剂所述高压压缩机2出来依次通过所述热水加热器4和所述空气换热器5放热同时实现供热水、空间供暖需求。When there is demand for cooling, hot water, and space heating at the same time, the hot water heater 4 and the air heat exchanger 5 before the gas cooler 6 are turned on, and the refrigerant from the high-pressure compressor 2 passes through in sequence. The hot water heater 4 and the air heat exchanger 5 release heat while meeting the demand for hot water supply and space heating.
同时有供冷、供热水、空调制冷需求时，开启所述气体冷却器6前的所述热水加热器4和所述中间冷却器9前的所述空调15，制冷剂所述高压压缩机出来依次通过所述热水加热器4、所述气体冷却器6、所述高压节流阀8和所述空调15，在所述热水加热器4中放出一部分热量，在所述空调15中吸收一部分热量，同时实现供热水、空调制冷需求。When there is demand for cooling, hot water, and air conditioning at the same time, the hot water heater 4 before the gas cooler 6 and the air conditioner 15 before the intercooler 9 are turned on, and the refrigerant is compressed at high pressure. When the machine comes out, it passes through the hot water heater 4, the gas cooler 6, the high pressure throttle valve 8 and the air conditioner 15 in sequence. At the same time, it can absorb a part of the heat, and at the same time realize the demand for hot water, air conditioning and refrigeration.
以上所述仅是本发明的优选实施方式，应当指出的是，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above are only the preferred embodiments of the present invention. It should be noted that, for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. These improvements and Retouching should also be considered within the scope of protection of the present invention.
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