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WO2019091241A1 - Cooling circulation system for air conditioning, and air conditioner - Google Patents

Cooling circulation system for air conditioning, and air conditioner Download PDF

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Publication number
WO2019091241A1
WO2019091241A1 PCT/CN2018/107876 CN2018107876W WO2019091241A1 WO 2019091241 A1 WO2019091241 A1 WO 2019091241A1 CN 2018107876 W CN2018107876 W CN 2018107876W WO 2019091241 A1 WO2019091241 A1 WO 2019091241A1
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Prior art keywords
heat exchanger
compressor
refrigeration cycle
air conditioner
air conditioning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/107876
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French (fr)
Chinese (zh)
Inventor
王飞
吴洪金
付裕
许文明
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Publication of WO2019091241A1 publication Critical patent/WO2019091241A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • F24F5/0003—Exclusively-fluid systems
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles

Definitions

  • the present invention provides an air conditioning refrigeration cycle system including a compressor connected in series in a main circuit, an outdoor heat exchanger, and a first section. a flow device and an indoor heat exchanger, a first gas-liquid separator is further connected in series on the main circuit, and a bypass circuit is arranged between the first gas-liquid separator and the compressor; After the refrigerant flowing out of the heater flows into the first gas-liquid separator through the first throttling device, the gaseous refrigerant flows along the bypass circuit to the compressor, and the liquid refrigerant flows along the main circuit to the Indoor heat exchanger.
  • the bypass circuit through the heat exchanger is a section between the compressor and the second throttle device.
  • the invention adds a first gas-liquid separator to the main circuit to form a bypass circuit with the compressor, and heat exchange between the refrigerant in the bypass circuit and the refrigerant at the end of the outdoor heat exchanger through the heat exchanger
  • the beneficial effects of the technical scheme of the present invention are as follows: (1) increasing the dryness of the refrigerant entering the evaporator (indoor heat exchanger), the pressure drop of the liquid refrigerant is small, and the heat exchange capacity of the latent heat of vaporization is high; (2) the direct return of the gaseous refrigerant to the compression Machine, the pressure drop loss is small, and the heat exchange at the end of the condenser (outdoor heat exchanger) will increase the degree of subcooling of the condenser, reduce the enthalpy of the condenser outlet, and increase the cooling capacity of the whole machine; (3) Direct return of the gaseous refrigerant to the compressor will increase the system return pressure, increase the exhaust pressure, and increase the condensing temperature, thereby increasing
  • FIG. 1 is a schematic structural view of an air conditioning refrigeration cycle system of the present invention
  • Fig. 2 is a schematic diagram showing the heating of the air conditioner of the present invention.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 reaches the outdoor heat exchanger 2 (in this case, the condenser) to perform heat exchange, and becomes a medium-temperature high-pressure liquid refrigerant.
  • the medium-temperature high-pressure liquid refrigerant flows out from the outlet of the outdoor heat exchanger 2, continues to flow along the main circuit, and passes through the first throttling device 3 to form a low-temperature low-pressure gas-liquid mixed state refrigerant, which flows into the first gas-liquid separator 5.
  • the bypass circuit N is provided with a second throttle device 6 for controlling the amount of gaseous refrigerant entering the bypass circuit N.
  • the heat exchanger 7 is for exchanging heat between the refrigerant in the bypass circuit N and the refrigerant in the main circuit.
  • the heat exchanger 7 can be a water tank containing water (the heat exchanger 7 can be in any other suitable form, the water tank is merely illustrative), and the bypass circuit N and the main circuit pass through the water tank, respectively.
  • the medium-temperature high-pressure liquid refrigerant flowing out of the outdoor heat exchanger 2 first passes through the heat exchanger 7 to exchange heat with the water in the heat exchanger 7, and then forms a low-temperature and low-pressure gas-liquid through the first throttling device 3.
  • the mixed refrigerant flows into the first gas-liquid separator 5.
  • the refrigeration cycle system of the present invention has the following beneficial effects: (1) increasing the dryness of the refrigerant entering the evaporator (indoor heat exchanger), the pressure drop of the liquid refrigerant is small, and the latent heat of vaporization is high; (2) The gaseous refrigerant is directly returned to the compressor, and the pressure drop loss is small, and the heat exchange at the end of the condenser (outdoor heat exchanger) increases the degree of subcooling of the condenser and reduces the enthalpy of the condenser outlet, so that the refrigeration capacity of the whole machine is also (3) The direct return of the gaseous refrigerant to the compressor will increase the system return pressure, increase the exhaust pressure, and increase the condensing temperature, thereby increasing the convective heat transfer temperature difference of the condenser and increasing the system cooling capacity.
  • the air conditioner further includes a bypass defrost circuit M disposed between the compressor 1 and the outdoor heat exchanger 2, and the bypass defrost circuit M is provided with a third throttle device 9.
  • the third throttle device 9 is closed and does not participate in the refrigeration/heating cycle.

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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)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

A cooling circulation system for air conditioning comprises a compressor (1), an outdoor heat exchanger (2), a first throttling device (3), an indoor heat exchanger (4) and a first vapor-liquid separator (5) which are connected in series in a main loop. A bypass loop (N) is provided between the first vapor-liquid separator (5) and the compressor (1). After a refrigerant flowing out from the outdoor heat exchanger (2) has passed through the first throttling device (3) and flowed into the first vapor-liquid separator (5), a gaseous refrigerant flows along the bypass loop (N) to enter the compressor (1) and a liquid refrigerant flows along the main loop to enter the outdoor heat exchanger (4). In the system, pressure loss of the gaseous refrigerant is reduced, thereby reducing energy consumption of the system while increasing system return gas pressure, system discharge gas pressure and condensation temperature, and accordingly increasing a temperature difference of the convective heat exchange of the refrigerant in the outdoor heat exchanger (2) and realizing increased cooling capacity of the system. Also disclosed is an air conditioner equipped with the cooling circulation system for air conditioning.

Description

空调制冷循环系统及空调器Air conditioning refrigeration cycle system and air conditioner 技术领域Technical field

本发明属于空调器技术领域，具体涉及一种空调制冷循环系统及空调器。The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioning refrigeration cycle system and an air conditioner.

背景技术Background technique

现有的空调制冷循环系统通常由冷凝器、节流装置、蒸发器、压缩机形成制冷循环回路，压缩机排出的高温高压气态冷媒在冷凝器中凝结成低温高压液体，并经节流装置节流成低温低压液体，然后进入蒸发器吸热蒸发，完成制冷循环。The existing air conditioning refrigeration cycle system usually forms a refrigeration cycle by a condenser, a throttle device, an evaporator, and a compressor, and the high temperature and high pressure gaseous refrigerant discharged from the compressor is condensed into a low temperature and high pressure liquid in the condenser, and is throttled by a throttle device. It flows into a low-temperature and low-pressure liquid, and then enters the evaporator to absorb heat and evaporate to complete the refrigeration cycle.

制冷剂在空调制冷循环系统中流动，其具有汽化潜热及等压比热容物理特性，参与和环境之间的热交换。制冷剂的单位质量制冷量是一项重要性能特征，意味着制冷剂在一定程度上质量越多，制冷或制热效果越好。例如，在高温环境下，制冷运行时，如果冷凝侧冷凝压力大，冷凝温度高，意味着制冷剂和外界环境的平均对流换热温差越大，意味着当冷凝面积和对流换热系数一定时，制冷量越大。此外，制冷剂在换热时，95％以上的换热量来源于其两相区的汽化潜热量，而单向区(纯液体、纯气体)的等压比热容相对很小，换热量占总系统循环的比例小。此外，气态制冷剂在管路内的压降大，是系统循环压损的主要来源，会增加循环做功量，即增加了制冷循环系统的能耗。The refrigerant flows in the air conditioning refrigeration cycle system, and has the vaporization latent heat and the isostatic specific heat capacity physical characteristics, and participates in heat exchange with the environment. The unit mass cooling capacity of a refrigerant is an important performance characteristic, meaning that the more the refrigerant is to a certain extent, the better the cooling or heating effect. For example, in a high temperature environment, during cooling operation, if the condensing pressure on the condensing side is large and the condensing temperature is high, it means that the average convective heat transfer temperature difference between the refrigerant and the external environment is larger, meaning that the condensation area and the convection heat transfer coefficient are one. Timing, the greater the amount of cooling. In addition, when the refrigerant is in heat exchange, more than 95% of the heat exchange amount is derived from the latent heat of vaporization in the two-phase region, and the isobaric specific heat capacity of the unidirectional zone (pure liquid, pure gas) is relatively small, and the heat exchange capacity accounts for a relatively small amount. The proportion of the total system cycle is small. In addition, the pressure drop of the gaseous refrigerant in the pipeline is large, which is the main source of the system cyclic pressure loss, which will increase the circulating work volume, that is, increase the energy consumption of the refrigeration cycle system.

基于此，本发明提出了一种新的制冷循环系统及空调器。Based on this, the present invention proposes a new refrigeration cycle system and an air conditioner.

发明内容Summary of the invention

为了解决现有技术中的上述问题，即为了提高空调制冷循环效果及降低能耗，本发明提供了一种空调制冷循环系统，包括串联在主回路的压缩机、室外换热器、第一节流装置和室内换热器，所述主回路上还串联有第一气液分离器，并且所述第一气液分离器与所述压缩机之间设置有旁通回路；从所述室外换热器流出的冷媒经所述第一节流装置流入所述第一气液分离器后，气态冷媒沿所述旁通回路流至所述压缩机，液态冷媒沿所述主回路流至所述室内换热器。In order to solve the above problems in the prior art, that is, in order to improve the air conditioning refrigeration cycle effect and reduce energy consumption, the present invention provides an air conditioning refrigeration cycle system including a compressor connected in series in a main circuit, an outdoor heat exchanger, and a first section. a flow device and an indoor heat exchanger, a first gas-liquid separator is further connected in series on the main circuit, and a bypass circuit is arranged between the first gas-liquid separator and the compressor; After the refrigerant flowing out of the heater flows into the first gas-liquid separator through the first throttling device, the gaseous refrigerant flows along the bypass circuit to the compressor, and the liquid refrigerant flows along the main circuit to the Indoor heat exchanger.

在上述空调制冷循环系统的优选实施方式中，所述空调制冷循环系统还包括热交换器，所述主回路和所述旁通回路均通过所述热交换器，所述热交换器用于使所述旁通回路内的冷媒和所述主回路内的冷媒进行换热。In a preferred embodiment of the above air conditioning refrigeration cycle system, the air conditioning refrigeration cycle system further includes a heat exchanger, and the main circuit and the bypass circuit both pass through the heat exchanger, and the heat exchanger is used to The refrigerant in the bypass circuit and the refrigerant in the main circuit exchange heat.

在上述空调制冷循环系统的优选实施方式中，通过所述热交换器的主回路为位于所述室外换热器出口与所述第一节流装置之间的区段。In a preferred embodiment of the above air conditioning refrigeration cycle system, the main circuit passing through the heat exchanger is a section between the outdoor heat exchanger outlet and the first throttle device.

在上述空调制冷循环系统的优选实施方式中，所述旁通回路上设置有第二节流装置，所述第二节流装置用于控制进入所述旁通回路的气态冷媒量。In a preferred embodiment of the above air conditioning refrigeration cycle system, the bypass circuit is provided with a second throttle device for controlling the amount of gaseous refrigerant entering the bypass circuit.

在上述空调制冷循环系统的优选实施方式中，通过所述热交换器的旁通回路为位于所述压缩机与所述第二节流装置之间的区段。In a preferred embodiment of the above air conditioning refrigeration cycle system, the bypass circuit through the heat exchanger is a section between the compressor and the second throttle device.

在上述空调制冷循环系统的优选实施方式中，所述压缩机设置有第二气液分离器，经所述第二气液分离器的气态冷媒被所述压缩机吸入。In a preferred embodiment of the above air conditioning refrigeration cycle system, the compressor is provided with a second gas-liquid separator, and the gaseous refrigerant passing through the second gas-liquid separator is sucked by the compressor.

本发明还提供了一种空调器，所述空调器安装有上述的空调制冷循环系统。The present invention also provides an air conditioner in which the above-described air conditioning refrigeration cycle system is installed.

在上述空调器的优选实施方式中，所述空调器设置有四通阀，所述四通阀用于在制冷循环与制热循环之间切换所述空调器。In a preferred embodiment of the above air conditioner, the air conditioner is provided with a four-way valve for switching the air conditioner between a refrigeration cycle and a heating cycle.

在上述空调器的优选实施方式中，所述空调器安装有上述空调制冷循环系统；当所述空调器处于制热循环时，所述第二节流装置被关闭。In a preferred embodiment of the above air conditioner, the air conditioner is equipped with the above air conditioning refrigeration cycle system; when the air conditioner is in a heating cycle, the second throttle device is closed.

在上述空调器的优选实施方式中，所述空调器还包括设置于所述压缩机和所述室外换热器之间的旁通除霜回路，所述旁通除霜回路设置有第三节流装置。In a preferred embodiment of the air conditioner, the air conditioner further includes a bypass defrosting circuit disposed between the compressor and the outdoor heat exchanger, and the bypass defrosting circuit is provided with a third section Flow device.

本发明在主回路中增加第一气液分离器，使其与压缩机之间形成旁通回路，以及通过热交换器使旁通回路中冷媒与室外换热器末端管路的冷媒进行热交换，本发明技术方案的有益效果为：(1)提升进入蒸发器(室内换热器)冷媒的干度，液态冷媒压降小、汽化潜热换热能力高；(2)气态冷媒直接回流到压缩机，压降损失小，且对冷凝器(室外换热器)末端进行热交换会增加冷凝器的过冷度，降低 冷凝器出口的焓值，使得整机制冷量也有所提升；(3)气态冷媒直接回流压缩机，会增加系统回气压力，提升排气压力，提升冷凝温度，从而提升冷凝器的对流换热温差，提升系统制冷量。The invention adds a first gas-liquid separator to the main circuit to form a bypass circuit with the compressor, and heat exchange between the refrigerant in the bypass circuit and the refrigerant at the end of the outdoor heat exchanger through the heat exchanger The beneficial effects of the technical scheme of the present invention are as follows: (1) increasing the dryness of the refrigerant entering the evaporator (indoor heat exchanger), the pressure drop of the liquid refrigerant is small, and the heat exchange capacity of the latent heat of vaporization is high; (2) the direct return of the gaseous refrigerant to the compression Machine, the pressure drop loss is small, and the heat exchange at the end of the condenser (outdoor heat exchanger) will increase the degree of subcooling of the condenser, reduce the enthalpy of the condenser outlet, and increase the cooling capacity of the whole machine; (3) Direct return of the gaseous refrigerant to the compressor will increase the system return pressure, increase the exhaust pressure, and increase the condensing temperature, thereby increasing the convective heat transfer temperature difference of the condenser and increasing the system cooling capacity.

附图说明DRAWINGS

图1是本发明的空调制冷循环系统的结构示意图；1 is a schematic structural view of an air conditioning refrigeration cycle system of the present invention;

图2是本发明的空调器的制热原理图。Fig. 2 is a schematic diagram showing the heating of the air conditioner of the present invention.

具体实施方式Detailed ways

下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the scope of the present invention.

如图1所示，本发明的空调制冷循环系统包括串联在主回路的压缩机1、室外换热器2、第一节流装置3、室内换热器4以及主回路上串联的第一气液分离器5。其中，第一气液分离器5与压缩机1之间设置有旁通回路N，从室外换热器2流出的冷媒经第一节流装置3流入第一气液分离器5后，气态冷媒沿旁通回路N流至压缩机1，液态冷媒沿主回路流至室内换热器2。As shown in FIG. 1, the air conditioning refrigeration cycle system of the present invention comprises a first gas connected in series in a main circuit of a compressor 1, an outdoor heat exchanger 2, a first throttle device 3, an indoor heat exchanger 4, and a main circuit. Liquid separator 5. Wherein, a bypass circuit N is disposed between the first gas-liquid separator 5 and the compressor 1, and the refrigerant flowing out of the outdoor heat exchanger 2 flows into the first gas-liquid separator 5 through the first throttle device 3, and the gaseous refrigerant Flows along the bypass circuit N to the compressor 1, and the liquid refrigerant flows along the main circuit to the indoor heat exchanger 2.

具体而言，在制冷循环运行时，压缩机1排出的高温高压气态冷媒到达室外换热器2(此时为冷凝器)进行热交换，变为中温高压的液态冷媒。然后，该中温高压的液态冷媒从室外换热器2出口流出，继续沿主回路流动，经过第一节流装置3后形成低温低压的气液混合态冷媒，流入第一气液分离器5。此时，从第一气液分离器5流出的气态冷媒沿旁通回路N流至压缩机1的回气口，从第一气液分离器5流出的液态冷媒沿主回路流至室内换热器4(此时为蒸发器)进行热交换，蒸发为气态冷媒后回流至压缩机1的回气口。压缩机1吸入气态冷媒并开启下一制冷循环。Specifically, during the operation of the refrigeration cycle, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 reaches the outdoor heat exchanger 2 (in this case, the condenser) to perform heat exchange, and becomes a medium-temperature high-pressure liquid refrigerant. Then, the medium-temperature high-pressure liquid refrigerant flows out from the outlet of the outdoor heat exchanger 2, continues to flow along the main circuit, and passes through the first throttling device 3 to form a low-temperature low-pressure gas-liquid mixed state refrigerant, which flows into the first gas-liquid separator 5. At this time, the gaseous refrigerant flowing out of the first gas-liquid separator 5 flows along the bypass circuit N to the gas return port of the compressor 1, and the liquid refrigerant flowing out of the first gas-liquid separator 5 flows along the main circuit to the indoor heat exchanger. 4 (in this case, the evaporator) performs heat exchange, evaporates into a gaseous refrigerant, and then returns to the gas return port of the compressor 1. The compressor 1 draws in gaseous refrigerant and starts the next refrigeration cycle.

基于背景技术中所述，本发明的制冷循环系统，即主回路中增加第一气液分离器5，使其与压缩机1之间形成旁通回路N，一方面，提升了进入室内换热器4冷媒的干度(第一气液分离器5分离出的液态冷媒进入室内换热器4)，而液态冷媒在循环中的压降小、汽化潜热换热能力高；另一方面，第一气液分离器5分离出的气态冷媒直接沿旁通 回路N回流至压缩机1，无需再经过室内换热器4，使得气态冷媒的压降损失小，降低系统能耗，同时能够增加系统回气压力，提升系统排气压力和冷凝温度，从而提升冷媒在室外换热器1的对流换热温差，实现提升系统制冷量的目的。According to the background art, the refrigeration cycle system of the present invention, that is, the first gas-liquid separator 5 is added to the main circuit to form a bypass circuit N with the compressor 1, and on the one hand, the heat exchange into the room is improved. The dryness of the refrigerant of the device 4 (the liquid refrigerant separated by the first gas-liquid separator 5 enters the indoor heat exchanger 4), and the pressure drop of the liquid refrigerant in the circulation is small, and the latent heat of vaporization heat is high; on the other hand, The gaseous refrigerant separated by a gas-liquid separator 5 is directly returned to the compressor 1 along the bypass circuit N, and does not need to pass through the indoor heat exchanger 4, so that the pressure drop loss of the gaseous refrigerant is small, the system energy consumption is reduced, and the system can be increased. The return air pressure increases the system exhaust pressure and the condensing temperature, thereby increasing the convective heat transfer temperature difference of the refrigerant in the outdoor heat exchanger 1, and achieving the purpose of increasing the system cooling capacity.

优选地，旁通回路N上设置有第二节流装置6，用于控制进入旁通回路N的气态冷媒量。Preferably, the bypass circuit N is provided with a second throttle device 6 for controlling the amount of gaseous refrigerant entering the bypass circuit N.

在一种优选的实施方式中，继续参照图1，空调制冷循环系统还包括热交换器7，主回路和旁通回路N均通过该热交换器7。具体地，通过热交换器7的主回路为位于室外换热器2出口与第一节流装置3之间的区段；通过热交换器7的旁通回路N为位于压缩机1与第二节流装置6之间的区段。也就是说，在制冷循环运行时，沿冷媒流动的方向依次为热交换器7→第一节流装置3→第一气液分离器5→第二节流装置6→热交换器7→压缩机1。In a preferred embodiment, with continued reference to FIG. 1, the air conditioning refrigeration cycle system further includes a heat exchanger 7 through which both the main circuit and the bypass circuit N pass. Specifically, the main circuit passing through the heat exchanger 7 is a section between the outlet of the outdoor heat exchanger 2 and the first throttle device 3; the bypass circuit N passing through the heat exchanger 7 is located at the compressor 1 and the second A section between the throttling devices 6. That is to say, in the operation of the refrigeration cycle, the heat exchanger 7 → the first throttle device 3 → the first gas-liquid separator 5 → the second throttle device 6 → the heat exchanger 7 → the compression in the direction of the flow of the refrigerant Machine 1.

热交换器7用于使旁通回路N内的冷媒和主回路内的冷媒进行换热。举例而言，热交换器7可以是一个盛有水的水箱(热交换器7也可以是其他任意适宜的形式，水箱仅为示例性说明)，旁通回路N和主回路分别通过该水箱。具体地，从室外换热器2流出的中温高压液态冷媒首先经过该热交换器7，与热交换器7内的水进行换热，然后经第一节流装置3后形成低温低压的气液混合态冷媒，流入第一气液分离器5。此时，从第一气液分离器5流出的气态冷媒经第二节流装置6再经过热交换器7，并与热交换器7内的水进行换热。也就相当于，旁通回路N内的气态冷媒与从室外换热器2流出的中温高压液态冷媒进行热交换，这样一来，能够增加室外换热器2的过冷度，降低室外换热器出口的焓值，从而提升整个制冷循环的制冷量。The heat exchanger 7 is for exchanging heat between the refrigerant in the bypass circuit N and the refrigerant in the main circuit. For example, the heat exchanger 7 can be a water tank containing water (the heat exchanger 7 can be in any other suitable form, the water tank is merely illustrative), and the bypass circuit N and the main circuit pass through the water tank, respectively. Specifically, the medium-temperature high-pressure liquid refrigerant flowing out of the outdoor heat exchanger 2 first passes through the heat exchanger 7 to exchange heat with the water in the heat exchanger 7, and then forms a low-temperature and low-pressure gas-liquid through the first throttling device 3. The mixed refrigerant flows into the first gas-liquid separator 5. At this time, the gaseous refrigerant flowing out of the first gas-liquid separator 5 passes through the heat exchanger 7 through the second expansion device 6, and exchanges heat with the water in the heat exchanger 7. That is, the gaseous refrigerant in the bypass circuit N exchanges heat with the medium-temperature high-pressure liquid refrigerant flowing out from the outdoor heat exchanger 2, so that the degree of subcooling of the outdoor heat exchanger 2 can be increased, and the outdoor heat exchange can be reduced. The enthalpy of the outlet of the vessel, thereby increasing the cooling capacity of the entire refrigeration cycle.

优选地，压缩机1设置有第二气液分离器11，无论从旁通回路N还是主回路进入压缩机1的气态冷媒首先经过该第二气液分离器11后，再被压缩机1吸入，从而开启下一循环。Preferably, the compressor 1 is provided with a second gas-liquid separator 11, and the gaseous refrigerant entering the compressor 1 from the bypass circuit N or the main circuit first passes through the second gas-liquid separator 11 and is sucked by the compressor 1 , thus opening the next cycle.

综上所述，本发明的制冷循环系统的有益效果为：(1)提升进入蒸发器(室内换热器)冷媒的干度，液态冷媒压降小、汽化潜热换热能力高；(2)气态冷媒直接回流到压缩机，压降损失小，且对冷凝器(室外换热器)末端进行热交换会增加冷凝器的过冷度，降低冷凝器出口的焓值，使得整机制冷量也有所提升；(3)气态冷媒直 接回流压缩机，会增加系统回气压力，提升排气压力，提升冷凝温度，从而提升冷凝器的对流换热温差，提升系统制冷量。In summary, the refrigeration cycle system of the present invention has the following beneficial effects: (1) increasing the dryness of the refrigerant entering the evaporator (indoor heat exchanger), the pressure drop of the liquid refrigerant is small, and the latent heat of vaporization is high; (2) The gaseous refrigerant is directly returned to the compressor, and the pressure drop loss is small, and the heat exchange at the end of the condenser (outdoor heat exchanger) increases the degree of subcooling of the condenser and reduces the enthalpy of the condenser outlet, so that the refrigeration capacity of the whole machine is also (3) The direct return of the gaseous refrigerant to the compressor will increase the system return pressure, increase the exhaust pressure, and increase the condensing temperature, thereby increasing the convective heat transfer temperature difference of the condenser and increasing the system cooling capacity.

本发明还提供了一种空调器，该空调器安装有上述中的空调制冷循环系统。上述空调制冷循环系统的目的是强化制冷量，按照高温制冷运行工况进行冷媒充注量核算，增加制冷循环时的质量流量和换热量，而本发明的空调器在安装上述制冷循环系统后，还可以设置四通阀实现空调器在制冷循环与制热循环之间的切换。The present invention also provides an air conditioner which is equipped with the air conditioning refrigeration cycle system described above. The purpose of the above air conditioning refrigeration cycle system is to strengthen the refrigeration capacity, calculate the refrigerant charge amount according to the high temperature refrigeration operation condition, and increase the mass flow rate and the heat exchange amount during the refrigeration cycle, and the air conditioner of the present invention is installed after the above refrigeration cycle system A four-way valve can also be provided to switch the air conditioner between the refrigeration cycle and the heating cycle.

具体而言，参照图2，图2是本发明的空调器的制热原理图。如图2所示，在本实施例中，空调器包括上述中的制冷循环系统(具体参照上文描述，在此不再赘述)，以及四通阀8。空调器通过四通阀8可以实现制冷模式与制热模式的切换，图2中示出了四通阀8切换为制热循环。在空调器制热运行时，关闭第二节流装置6。此目的在于，由于所需强冷功能的地区(如中东地区)，制热工况并非很恶劣，所以相对制热循环不需那么多，用第一气液分离器5进行存储，可以降低制热循环时的功耗提升能效。Specifically, referring to Fig. 2, Fig. 2 is a schematic diagram of the heating of the air conditioner of the present invention. As shown in FIG. 2, in the present embodiment, the air conditioner includes the above-described refrigeration cycle system (refer to the above description, which will not be described herein), and the four-way valve 8. The air conditioner can switch between the cooling mode and the heating mode through the four-way valve 8, and the four-way valve 8 is switched to the heating cycle in FIG. The second throttle device 6 is closed during the heating operation of the air conditioner. The purpose is that, in areas where strong cooling is required (such as the Middle East), the heating conditions are not very bad, so the relative heating cycle does not need to be so much, and the first gas-liquid separator 5 is used for storage, which can be reduced. Power consumption during thermal cycling increases energy efficiency.

优选地，继续参照图2，空调器还包括设置于压缩机1和室外换热器2之间的旁通除霜回路M，旁通除霜回路M设置有第三节流装置9。在制冷/制热运行时，第三节流装置9关闭不参与制冷/制热循环。当在制热过程中需要除霜时，打开第三节流装置9，压缩机1排出的高温高压冷媒分两路，一路进入室内换热器4(此时为冷凝器)进行热交换，给室内带来热量，另一路通过第一节流装置9进入结霜的室外换热器2(此时为蒸发器)进行除霜，这样保证了制热的连续运行。Preferably, with continued reference to FIG. 2, the air conditioner further includes a bypass defrost circuit M disposed between the compressor 1 and the outdoor heat exchanger 2, and the bypass defrost circuit M is provided with a third throttle device 9. During the cooling/heating operation, the third throttle device 9 is closed and does not participate in the refrigeration/heating cycle. When defrosting is required during the heating process, the third throttling device 9 is opened, and the high-temperature and high-pressure refrigerant discharged from the compressor 1 is divided into two paths, and all the way enters the indoor heat exchanger 4 (at this time, the condenser) for heat exchange, The interior brings heat, and the other way passes through the first throttling device 9 into the frosted outdoor heat exchanger 2 (in this case, the evaporator) for defrosting, thus ensuring continuous operation of heating.

至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but it is obvious to those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the principles of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

Claims (10)

一种空调制冷循环系统，包括串联在主回路的压缩机、室外换热器、第一节流装置和室内换热器，其特征在于，An air conditioning refrigeration cycle system comprising a compressor connected in series in a main circuit, an outdoor heat exchanger, a first throttling device and an indoor heat exchanger, wherein 所述主回路上还串联有第一气液分离器，并且所述第一气液分离器与所述压缩机之间设置有旁通回路；a first gas-liquid separator is further connected in series on the main circuit, and a bypass circuit is disposed between the first gas-liquid separator and the compressor; 从所述室外换热器流出的冷媒经所述第一节流装置流入所述第一气液分离器后，气态冷媒沿所述旁通回路流至所述压缩机，液态冷媒沿所述主回路流至所述室内换热器。After the refrigerant flowing out of the outdoor heat exchanger flows into the first gas-liquid separator through the first throttling device, gaseous refrigerant flows along the bypass circuit to the compressor, and the liquid refrigerant follows the main The circuit flows to the indoor heat exchanger. 根据权利要求1所述的空调制冷循环系统，其特征在于，所述空调制冷循环系统还包括热交换器，所述主回路和所述旁通回路均通过所述热交换器，The air conditioning refrigeration cycle system according to claim 1, wherein said air conditioning refrigeration cycle system further comprises a heat exchanger, said main circuit and said bypass circuit both passing through said heat exchanger 所述热交换器用于使所述旁通回路内的冷媒和所述主回路内的冷媒进行换热。The heat exchanger is configured to exchange heat between the refrigerant in the bypass circuit and the refrigerant in the main circuit. 根据权利要求2所述的空调制冷循环系统，其特征在于，通过所述热交换器的主回路为位于所述室外换热器出口与所述第一节流装置之间的区段。The air conditioning refrigeration cycle system according to claim 2, wherein the main circuit passing through the heat exchanger is a section between the outdoor heat exchanger outlet and the first throttle device. 根据权利要求3所述的空调制冷循环系统，其特征在于，所述旁通回路上设置有第二节流装置，所述第二节流装置用于控制进入所述旁通回路的气态冷媒量。The air conditioning refrigeration cycle system according to claim 3, wherein said bypass circuit is provided with a second throttle device for controlling the amount of gaseous refrigerant entering said bypass circuit . 根据权利要求4所述的空调制冷循环系统，其特征在于，通过所述热交换器的旁通回路为位于所述压缩机与所述第二节流装置之间的区段。The air conditioning refrigeration cycle system according to claim 4, wherein the bypass passage through the heat exchanger is a section between the compressor and the second throttle device. 根据权利要求1至5中任一项所述的空调制冷循环系统，其特征在于，所述压缩机设置有第二气液分离器，经所述第二气液分离器的气态冷媒被所述压缩机吸入。The air conditioning refrigeration cycle system according to any one of claims 1 to 5, wherein the compressor is provided with a second gas-liquid separator, and the gaseous refrigerant passing through the second gas-liquid separator is Compressor suction. 一种空调器，其特征在于，所述空调器安装有权利要求1至6中任一项所述的空调制冷循环系统。An air conditioner, characterized in that the air conditioner is equipped with the air conditioning refrigeration cycle system according to any one of claims 1 to 6. 根据权利要求7所述的空调器，其特征在于，所述空调器设置有四通阀，所述四通阀用于在制冷循环与制热循环之间切换所述空调器。The air conditioner according to claim 7, wherein said air conditioner is provided with a four-way valve for switching said air conditioner between a refrigeration cycle and a heating cycle. 根据权利要求8所述的空调器，其特征在于，所述空调器安装有权利要求4至6中任一项所述的空调制冷循环系统；The air conditioner according to claim 8, wherein the air conditioner is equipped with the air conditioning refrigeration cycle system according to any one of claims 4 to 6; 当所述空调器处于制热循环时，所述第二节流装置被关闭。The second throttle device is closed when the air conditioner is in a heating cycle. 根据权利要求7至9中任一项所述的空调器，其特征在于，所述空调器还包括设置于所述压缩机和所述室外换热器之间的旁通除霜回路，所述旁通除霜回路设置有第三节流装置。The air conditioner according to any one of claims 7 to 9, wherein the air conditioner further includes a bypass defrosting circuit disposed between the compressor and the outdoor heat exchanger, The bypass defrost circuit is provided with a third throttling device.
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