WO2020164210A1 - Air conditioning system - Google Patents

Air conditioning system Download PDF

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Publication number
WO2020164210A1
WO2020164210A1 PCT/CN2019/091494 CN2019091494W WO2020164210A1 WO 2020164210 A1 WO2020164210 A1 WO 2020164210A1 CN 2019091494 W CN2019091494 W CN 2019091494W WO 2020164210 A1 WO2020164210 A1 WO 2020164210A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
centrifugal compressor
subcooler
conditioning system
air conditioning
Prior art date
Application number
PCT/CN2019/091494
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French (fr)
Chinese (zh)
Inventor
熊建国
苏玉海
张仕强
李立民
Original Assignee
珠海格力电器股份有限公司
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Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Publication of WO2020164210A1 publication Critical patent/WO2020164210A1/en

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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
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/02—Compressor arrangements of motor-compressor units
    • 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
    • F25B40/02—Subcoolers
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
    • F25B41/30—Expansion means; Dispositions thereof

Definitions

  • the present disclosure relates to the technical field of air conditioners, and in particular to an air conditioning system.
  • multi-line air-conditioning systems are mostly used for cooling or heating in large public places and other places.
  • multi-line air-conditioning systems have the advantages of energy saving, low operating costs, good unit adaptability, reliable operation, wide cooling and heating temperature ranges, high design freedom and convenient installation.
  • there are some shortcomings in the operation of the multi-line air conditioning system including the following points:
  • the single-stage compression of the centrifugal compressor can achieve a pressure ratio n ⁇ 4. If the pressure ratio is too small, the air conditioning cooling/heating effect is not obvious;
  • An embodiment of the present disclosure proposes an air conditioning system to improve the cooling or heating capacity of a multi-stage centrifugal compressor.
  • an air conditioning system including:
  • Centrifugal compressor including multi-stage compression chamber
  • the subcooler is connected to the inlet of the centrifugal compressor and is used to exchange heat from the refrigerant from the indoor heat exchanger or the outdoor heat exchanger to send the heat-exchanged refrigerant to the centrifugal compressor;
  • the first throttle element is arranged upstream of the subcooler and is used to throttle the refrigerant entering the subcooler.
  • the subcooler is arranged between the indoor heat exchanger and the outdoor heat exchanger, and the indoor heat exchanger and the outdoor heat exchanger are connected through the first branch through the supercooler, and the indoor heat exchanger is connected to the
  • the connecting pipeline between the subcoolers communicates with the compression chamber through a second branch passing through the subcooler.
  • the compression chambers of each stage are respectively communicated with the second branch through a separate connecting pipeline.
  • the communication pipeline between the compression chamber and the second branch is provided with a first solenoid valve for adjusting the flow rate.
  • the centrifugal compressor further includes a motor and a motor chamber for storing the motor, and the second branch is in communication with the motor chamber.
  • the communication pipeline between the second branch and the motor chamber is provided with a second solenoid valve for adjusting the flow rate.
  • the motor chamber communicates with the inlet of the centrifugal compressor.
  • the air conditioning system further includes a second throttling element disposed between the outdoor heat exchanger and the subcooler and/or a third throttling element between the indoor heat exchanger and the subcooler.
  • the air conditioning system includes a plurality of indoor heat exchangers connected in parallel.
  • the air conditioning system further includes a four-way valve, which is used to connect the indoor heat exchanger, the outdoor heat exchanger, the inlet of the centrifugal compressor, and the outlet of the centrifugal compressor.
  • the present disclosure can introduce a part of the refrigerant from the indoor heat exchanger or outdoor heat exchanger through the first throttling element and then enter the subcooler for throttling by installing the subcooler and the first throttle element.
  • Heat exchange the refrigerant after the heat exchange is sent to the multi-stage centrifugal compressor to increase the suction capacity of the multi-stage centrifugal compressor, increase the work of the multi-stage centrifugal compressor, and improve the refrigeration or heating capacity of the multi-stage centrifugal compressor .
  • Fig. 1 is a schematic diagram of an embodiment of the air-conditioning system of the present disclosure.
  • Fig. 2 is a schematic diagram of refrigerant circulation in a cooling mode of an embodiment of the air-conditioning system of the present disclosure.
  • Fig. 3 is a schematic diagram of refrigerant circulation in a heating mode of an embodiment of the air-conditioning system of the present disclosure.
  • the air conditioning system includes an indoor heat exchanger 1, an outdoor heat exchanger 2, a centrifugal compressor 3, a subcooler 4, and a first throttle element 5.
  • the centrifugal compressor 3 includes a multi-stage compression chamber 31, the subcooler 4 is connected with the inlet of the centrifugal compressor 3, and the subcooler 4 is used to exchange the refrigerant from the indoor heat exchanger 1 or the outdoor heat exchanger 2. Heat to introduce the heat-exchanged refrigerant into the centrifugal compressor 3.
  • the first throttling element 5 is arranged upstream of the subcooler 4, and the first throttling element 5 is used for throttling the refrigerant entering the subcooler 4. flow.
  • a part of the refrigerant can be introduced from the indoor heat exchanger 1 or the outdoor heat exchanger 2 (generally as a condenser heat exchanger).
  • the first throttling element 5 is throttling, and then enters the subcooler 4 for heat exchange.
  • the heat exchanged refrigerant is sent to the multi-stage centrifugal compressor 3 to increase the suction volume of the multi-stage centrifugal compressor 3 to make the The work done by the centrifugal compressor 3 is increased, and the refrigeration or heating capacity of the multi-stage centrifugal compressor 3 is improved.
  • the centrifugal compressor 3 is a centrifugal compressor containing multi-stage compression chambers, which can degrade the high pressure ratio in stages and reduce the single-stage pressure ratio, which is convenient for controlling the pressure ratio at the optimal value and achieving rapid air conditioning. The effect of cooling and heating.
  • the first throttle element 5 can be an electronic expansion valve or the like.
  • the subcooler 4 is arranged between the indoor heat exchanger 1 and the outdoor heat exchanger 2, and the indoor heat exchanger 1 and the outdoor heat exchanger 2 are connected through the first branch through the subcooler 4 ,
  • the connecting pipeline between the indoor heat exchanger 1 and the subcooler 4 communicates with the compression chamber 31 through a second branch passing through the subcooler 4.
  • each stage of the compression chamber 31 is respectively communicated with the second branch through a separate connecting pipeline.
  • the refrigerant introduced through the second branch can be sent to each stage of the compression chamber 31 of the centrifugal compressor 3, so as to improve the compression ratio of each stage of the compression chamber 31, thereby improving the multi-stage centrifugal compressor 3.
  • the total compression ratio is respectively communicated with the second branch through a separate connecting pipeline.
  • the communication pipeline between the compression chamber 31 and the second branch is provided with a first solenoid valve 9 for adjusting the flow rate.
  • the communication pipeline between each stage of compression chamber 31 and the second branch is provided with a first solenoid valve 9 for adjusting the flow rate, so that independent control of each stage of compression chamber 31 can be realized according to It is actually necessary to control the flow rate into the compression chamber 31 of each stage.
  • the centrifugal compressor 3 further includes a motor and a motor chamber 32 for storing the motor, and the second branch is in communication with the motor chamber 32.
  • the advantage of this arrangement is that a part of the refrigerant can be sent into the motor chamber 32 to cool the motor in the motor chamber 32, and avoid the bearing, casing and other parts of the centrifugal compressor 3 due to too high temperature. Cause damage and affect the service life of the centrifugal compressor 3.
  • the communication pipeline between the second branch and the motor chamber 32 is provided with a second solenoid valve 10 for adjusting the flow rate.
  • the second solenoid valve 10 By providing the second solenoid valve 10, the flow rate of the refrigerant fed into the motor chamber 32 can be controlled according to actual needs.
  • the motor chamber 32 communicates with the inlet of the centrifugal compressor 3.
  • the refrigerant sent into the motor chamber 32 can be sent to the compression chamber 31 after cooling the motor, so as to achieve full utilization.
  • the air conditioning system further includes a second throttling element 6 arranged between the outdoor heat exchanger 2 and the subcooler 4 and/or a third throttling element between the indoor heat exchanger 1 and the subcooler 4 7.
  • the second throttle element 6 and the third throttle element 7 may be electronic expansion valves or the like.
  • the air conditioning system includes a plurality of indoor heat exchangers 1 connected in parallel to form a multi-line air conditioning system.
  • the air conditioning system further includes a four-way valve 8 for connecting the indoor heat exchanger 1, the outdoor heat exchanger 2, the inlet of the centrifugal compressor 3 and the outlet of the centrifugal compressor 3.
  • a four-way valve 8 for connecting the indoor heat exchanger 1, the outdoor heat exchanger 2, the inlet of the centrifugal compressor 3 and the outlet of the centrifugal compressor 3.
  • the air conditioning system includes an indoor heat exchanger 1, an outdoor heat exchanger 2, a centrifugal compressor 3, a subcooler 4, a first throttling element 5, a second throttling element 6, and a third throttling element 7.
  • Four-way valve 8 first solenoid valve 9, second solenoid valve 10 and gas-liquid separator 11.
  • the indoor heat exchanger 1 includes four.
  • the indoor heat exchanger 1 and the outdoor heat exchanger 2 are connected by a first branch.
  • the first branch is provided with a second throttling element 6 and a third throttling element 7, and it is subcooled.
  • the device 4 is also arranged on the first branch road.
  • the connecting pipeline between the third throttle element 7 and the subcooler 4 is connected to the centrifugal compressor 3 through the second branch.
  • the first throttle element 5 is arranged on the second branch, and one end of the first throttle element 5 Connected to the connecting pipeline between the third throttle element 7 and the subcooler 4, the other end of the first throttle element 5 is connected to the subcooler 4, and the subcooler 4 is connected to the compression chamber 31 of the centrifugal compressor 3 It communicates with the motor chamber 32.
  • the second branch is connected to each stage of the compression chamber 31 through independent connecting pipelines, and each connecting pipeline is provided with a first solenoid valve 9.
  • the second branch is also connected to the motor chamber 32, and a second solenoid valve 10 is provided on the communicating pipeline.
  • the four-way valve 8 communicates with the indoor heat exchanger 1, the outdoor heat exchanger 2, the inlet of the centrifugal compressor 3 and the outlet of the centrifugal compressor 3.
  • a gas-liquid separator 11 is also provided upstream of the centrifugal compressor 3 to separate the refrigerant entering the centrifugal compressor 3 from vapor-liquid.
  • the refrigerant coming out of the outdoor heat exchanger 2 enters the subcooler 4, and after coming out of the subcooler 4, it is divided into two paths.
  • the main path is the refrigeration circuit, and the branch The circuit is a branch circuit for cooling the motor and blowing air into the compression chamber 31.
  • the two refrigerants exchange heat in the subcooler 4.
  • the main circuit refrigerant is fully cooled by the cooler 4, and the subcooling degree of the refrigerant is increased.
  • the indoor heat exchanger 1 evaporator
  • gas-liquid The separator 11 enters the centrifugal compressor 3 to perform a multi-stage compression process. Since the main circuit refrigerant is sufficiently subcooled by the cooler 4, the enthalpy difference between the inlet and outlet of the indoor heat exchanger 1 (evaporator) increases, which can absorb more heat from the indoor environment, thereby reducing the indoor temperature. Thereby improving the cooling capacity.
  • the branch refrigerant enters the subcooler 4 after being throttled and reduced in pressure by the first throttling element 5 for heat exchange and evaporation.
  • the refrigerant from the motor chamber 32 merges into the main circuit refrigerant and enters the centrifugal compressor 3 through the gas-liquid separator 11; the other is injected into the compression chamber 31 to control the displacement of the centrifugal compressor 3 Within a reasonable range.
  • the refrigerant after multi-stage compression by the centrifugal compressor 3 enters the outdoor heat exchanger 2 (condenser) through the four-way valve 8, thereby forming a complete refrigeration cycle.
  • the refrigerant coming out of the indoor heat exchanger 1 (condenser) is divided into two paths, the main refrigerant liquid directly enters the subcooler 4, and the branch refrigerant
  • the first throttle element 5 throttling and reducing the pressure before entering the subcooler 4, and the two parts of refrigerant exchange heat in the subcooler 4.
  • the refrigerant in the main circuit is further subcooled and enters the outdoor heat exchanger 2 (evaporator) after being depressurized by the second throttle element 6, and then enters the centrifugal compressor 3 through the four-way valve 8 and the gas-liquid separator 11.
  • the branch refrigerant absorbs heat and evaporates in the subcooler 4, and is divided into two branches, one of which enters the motor chamber 32 to cool the motor and reduce the temperature rise of the motor.
  • the refrigerant exits the motor chamber 32
  • the refrigerant entering the main circuit enters the centrifugal compressor 3 through the gas-liquid separator 11; the other branch is sprayed from the injection port of the centrifugal compressor 3 into the compression chambers 31 at various levels to control the exhaust temperature within a reasonable range.
  • the main refrigerant and the branch refrigerant are mixed in the compression chamber 31 and discharged after multi-stage compression, and enter the indoor heat exchanger 1 (condenser) through the four-way valve 8, thereby forming a closed jet enthalpy heating cycle.
  • the refrigerant suction of the centrifugal compressor 3 increases, the work of the centrifugal compressor 3 increases, the heat exchange of the indoor heat exchanger (condenser) increases, the heating capacity is significantly improved, and the low temperature is guaranteed. Heating does not decay.
  • the refrigerant is injected into the intermediate pressure chamber of the centrifugal compressor 3 and is mixed with the original refrigerant in the compression chamber, thereby reducing the exhaust temperature and ensuring the safe and reliable operation of the unit.
  • the enthalpy of the jet is increased, the refrigerant flow of the centrifugal compressor is increased, the work of the centrifugal compressor is increased, and the cooling and heating capacity is significantly improved;
  • the introduction of refrigerant into the motor chamber can cool the motor, reduce the temperature rise of the motor, prevent the motor from being damaged by excessive temperature rise, improve the normal service life of the centrifugal compressor, and improve the reliability of the centrifugal compressor.

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  • Mechanical Engineering (AREA)
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Abstract

An air conditioning system, comprising an indoor heat exchanger (1), an outdoor heat exchanger (2), a centrifugal compressor (3), a subcooler (4), and a first throttling element (5). The centrifugal compressor (3) comprises multi-stage compression chambers (31); the subcooler (4) is communicated with an inlet of the centrifugal compressor (3) and is used for performing heat exchange on a refrigerant from the indoor heat exchanger (1) or the outdoor heat exchanger (2) so as to send the refrigerant subjected to the heat exchange into the multi-stage compression chambers (31) of the centrifugal compressor (3); and the first throttling element (5) is provided at the upstream of the subcooler (4) and is used for throttling the refrigerant entering the subcooler (4). The centrifugal compressor (3) is provided with multi-stage compression chambers (31), the air suction volume is increased, and the refrigeration or heating capacity is improved.

Description

空调***Air Conditioning System
本申请是以中国申请号为201910111068.X，申请日为2019年2月12日的申请为基础，并主张其优先权，该中国申请的公开内容在此作为整体引入本申请中。This application is based on the application with the Chinese application number 201910111068.X and the filing date of February 12, 2019, and claims its priority. The disclosure of the Chinese application is hereby incorporated into this application as a whole.
技术领域Technical field
本公开涉及空调器技术领域，尤其涉及一种空调***。The present disclosure relates to the technical field of air conditioners, and in particular to an air conditioning system.
背景技术Background technique
近年来，在大型公共场所等地方大多采用多联机空调***进行制冷或制热。与传统空调***相比，多联机空调***具有节约能源、运行费用低、机组适应性好、运行可靠、制冷和制热温度范围宽、设计自由度高和安装方便等优点。但多联机空调***在运行过程中也存在一些缺点，具体包括以下几点：In recent years, multi-line air-conditioning systems are mostly used for cooling or heating in large public places and other places. Compared with traditional air-conditioning systems, multi-line air-conditioning systems have the advantages of energy saving, low operating costs, good unit adaptability, reliable operation, wide cooling and heating temperature ranges, high design freedom and convenient installation. However, there are some shortcomings in the operation of the multi-line air conditioning system, including the following points:
1、离心式压缩机的单级压缩所能达到的压力比n≤4，压比过小，空调制冷/制热效果不明显；1. The single-stage compression of the centrifugal compressor can achieve a pressure ratio n≤4. If the pressure ratio is too small, the air conditioning cooling/heating effect is not obvious;
2、在低温环境中，热泵机组的蒸发压力会降低，因此会导致压缩机的吸气比容增大，制冷剂的流量减少，压缩机的有效容积得不到充分利用，机组的制热能力大幅衰减；2. In a low temperature environment, the evaporation pressure of the heat pump unit will decrease, which will lead to an increase in the suction specific volume of the compressor, a decrease in the flow of refrigerant, and the effective volume of the compressor cannot be fully utilized, and the heating capacity of the unit Greatly attenuated
3、压缩机在运行过程中电机温升较大，这样不仅多消耗功，造成能源浪费；而且排气温度太高对压缩机的轴承、机壳等零部件的工作也不利，影响压缩机的正常使用寿命。3. The temperature rise of the motor during the operation of the compressor is large, which not only consumes more work and causes energy waste; and the exhaust temperature is too high, which is also detrimental to the work of the compressor's bearings, casing and other parts, affecting the compressor's performance. Normal service life.
需要说明的是，公开于本公开背景技术部分的信息仅仅旨在增加对本公开的总体背景的理解，而不应当被视为承认或以任何形式暗示该信息构成已为本领域技术人员所公知的现有技术。It should be noted that the information disclosed in the background section of the present disclosure is only intended to increase the understanding of the overall background of the present disclosure, and should not be regarded as an acknowledgement or in any form implying that the information constitutes already known to those skilled in the art current technology.
发明内容Summary of the invention
本公开实施例提出一种空调***，以提高多级离心压缩机的制冷或制热能力。An embodiment of the present disclosure proposes an air conditioning system to improve the cooling or heating capacity of a multi-stage centrifugal compressor.
根据本公开的一个方面，提供了一种空调***，包括：According to one aspect of the present disclosure, there is provided an air conditioning system, including:
室内换热器；Indoor heat exchanger;
室外换热器；Outdoor heat exchanger;
离心压缩机，包括多级压缩腔室；Centrifugal compressor, including multi-stage compression chamber;
过冷器，与离心压缩机的进口连通，用于对来自室内换热器或室外换热器的制冷剂进行换热，以将换热后的制冷剂送入离心压缩机；和The subcooler is connected to the inlet of the centrifugal compressor and is used to exchange heat from the refrigerant from the indoor heat exchanger or the outdoor heat exchanger to send the heat-exchanged refrigerant to the centrifugal compressor; and
第一节流元件，设置在过冷器的上游，用于对进入过冷器的制冷剂进行节流。The first throttle element is arranged upstream of the subcooler and is used to throttle the refrigerant entering the subcooler.
在一些实施例中，过冷器设置在室内换热器和室外换热器之间，且室内换热器和室外换热器通过经过过冷器的第一支路连通，室内换热器与过冷器之间的连接管路通过经过过冷器的第二支路与压缩腔室连通。In some embodiments, the subcooler is arranged between the indoor heat exchanger and the outdoor heat exchanger, and the indoor heat exchanger and the outdoor heat exchanger are connected through the first branch through the supercooler, and the indoor heat exchanger is connected to the The connecting pipeline between the subcoolers communicates with the compression chamber through a second branch passing through the subcooler.
在一些实施例中，每级压缩腔室分别通过单独的连接管路与第二支路连通。In some embodiments, the compression chambers of each stage are respectively communicated with the second branch through a separate connecting pipeline.
在一些实施例中，压缩腔室与第二支路的连通管路上设有用于调节通流流量的第一电磁阀。In some embodiments, the communication pipeline between the compression chamber and the second branch is provided with a first solenoid valve for adjusting the flow rate.
在一些实施例中，离心压缩机还包括电机和用于存放电机的电机腔室，第二支路与电机腔室连通。In some embodiments, the centrifugal compressor further includes a motor and a motor chamber for storing the motor, and the second branch is in communication with the motor chamber.
在一些实施例中，第二支路与电机腔室之间的连通管路上设有用于调节通流流量的第二电磁阀。In some embodiments, the communication pipeline between the second branch and the motor chamber is provided with a second solenoid valve for adjusting the flow rate.
在一些实施例中，电机腔室与离心压缩机的进口连通。In some embodiments, the motor chamber communicates with the inlet of the centrifugal compressor.
在一些实施例中，空调***还包括设置在室外换热器与过冷器之间的第二节流元件和/或室内换热器与过冷器之间的第三节流元件。In some embodiments, the air conditioning system further includes a second throttling element disposed between the outdoor heat exchanger and the subcooler and/or a third throttling element between the indoor heat exchanger and the subcooler.
在一些实施例中，空调***包括多个并联连接的室内换热器。In some embodiments, the air conditioning system includes a plurality of indoor heat exchangers connected in parallel.
在一些实施例中，空调***还包括四通阀，四通阀用于连接室内换热器、室外换热器、离心压缩机的进口和离心压缩机的出口。In some embodiments, the air conditioning system further includes a four-way valve, which is used to connect the indoor heat exchanger, the outdoor heat exchanger, the inlet of the centrifugal compressor, and the outlet of the centrifugal compressor.
基于上述技术方案，本公开通过设置过冷器和第一节流元件，可以从室内换热器或室外换热器中引一部分制冷剂通过第一节流元件节流，然后进入过冷器进行换热，换热后的制冷剂送入多级离心压缩机，提高多级离心压缩机的吸气量，使多级离心压缩机的做功增多，提高多级离心压缩机的制冷或制热能力。Based on the above technical solution, the present disclosure can introduce a part of the refrigerant from the indoor heat exchanger or outdoor heat exchanger through the first throttling element and then enter the subcooler for throttling by installing the subcooler and the first throttle element. Heat exchange, the refrigerant after the heat exchange is sent to the multi-stage centrifugal compressor to increase the suction capacity of the multi-stage centrifugal compressor, increase the work of the multi-stage centrifugal compressor, and improve the refrigeration or heating capacity of the multi-stage centrifugal compressor .
通过以下参照附图对本公开的示例性实施例的详细描述，本公开的其它特征及其优点将会变得清楚。Through the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings, other features and advantages of the present disclosure will become clear.
附图说明Description of the drawings
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅 是本公开的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。In order to explain the embodiments of the present disclosure or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are the embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work.
图1为本公开空调***一个实施例的原理图。Fig. 1 is a schematic diagram of an embodiment of the air-conditioning system of the present disclosure.
图2为本公开空调***一个实施例在制冷模式时的制冷剂流通原理图。Fig. 2 is a schematic diagram of refrigerant circulation in a cooling mode of an embodiment of the air-conditioning system of the present disclosure.
图3为本公开空调***一个实施例在制热模式时的制冷剂流通原理图。Fig. 3 is a schematic diagram of refrigerant circulation in a heating mode of an embodiment of the air-conditioning system of the present disclosure.
具体实施方式detailed description
下面将结合本公开实施例中的附图，对实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本公开的一部分实施例，而不是全部的实施例。基于本公开的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。The technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present disclosure.
在本公开的描述中，需要理解的是，术语“中心”、“横向”、“纵向”、“前”、“后”、“左”、“右”、“上”、“下”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开保护范围的限制。In the description of the present disclosure, it should be understood that the terms "center", "horizontal", "longitudinal", "front", "rear", "left", "right", "upper", "lower", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and The description is simplified, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the protection scope of the present disclosure.
如图1所示，在本公开提供空调***的一个实施例中，该空调***包括室内换热器1、室外换热器2、离心压缩机3、过冷器4和第一节流元件5，离心压缩机3包括多级压缩腔室31，过冷器4与离心压缩机3的进口连通，过冷器4用于对来自室内换热器1或室外换热器2的制冷剂进行换热，以将换热后的制冷剂引入离心压缩机3，第一节流元件5设置在过冷器4的上游，第一节流元件5用于对进入过冷器4的制冷剂进行节流。As shown in FIG. 1, in an embodiment of the air conditioning system provided by the present disclosure, the air conditioning system includes an indoor heat exchanger 1, an outdoor heat exchanger 2, a centrifugal compressor 3, a subcooler 4, and a first throttle element 5. , The centrifugal compressor 3 includes a multi-stage compression chamber 31, the subcooler 4 is connected with the inlet of the centrifugal compressor 3, and the subcooler 4 is used to exchange the refrigerant from the indoor heat exchanger 1 or the outdoor heat exchanger 2. Heat to introduce the heat-exchanged refrigerant into the centrifugal compressor 3. The first throttling element 5 is arranged upstream of the subcooler 4, and the first throttling element 5 is used for throttling the refrigerant entering the subcooler 4. flow.
在上述实施例中，通过设置过冷器4和第一节流元件5，可以从室内换热器1或室外换热器2中(一般是作为冷凝器的换热器)引一部分制冷剂通过第一节流元件5进行节流，然后进入过冷器4进行换热，换热后的制冷剂送入多级离心压缩机3，提高多级离心压缩机3的吸气量，使多级离心压缩机3的做功增多，提高多级离心压缩机3的制冷或制热能力。In the above embodiment, by providing the subcooler 4 and the first throttling element 5, a part of the refrigerant can be introduced from the indoor heat exchanger 1 or the outdoor heat exchanger 2 (generally as a condenser heat exchanger). The first throttling element 5 is throttling, and then enters the subcooler 4 for heat exchange. The heat exchanged refrigerant is sent to the multi-stage centrifugal compressor 3 to increase the suction volume of the multi-stage centrifugal compressor 3 to make the The work done by the centrifugal compressor 3 is increased, and the refrigeration or heating capacity of the multi-stage centrifugal compressor 3 is improved.
在上述实施例中，离心压缩机3为包含多级压缩腔室的离心压缩机，可将高压力比分级降解，使单级压比降低，便于将压比控制在最优值，达到空调快速制冷和制热的效果。In the above-mentioned embodiment, the centrifugal compressor 3 is a centrifugal compressor containing multi-stage compression chambers, which can degrade the high pressure ratio in stages and reduce the single-stage pressure ratio, which is convenient for controlling the pressure ratio at the optimal value and achieving rapid air conditioning. The effect of cooling and heating.
第一节流元件5可以采用电子膨胀阀等。The first throttle element 5 can be an electronic expansion valve or the like.
如图1所示，过冷器4设置在室内换热器1和室外换热器2之间，且室内换热器1和室外换热器2通过经过过冷器4的第一支路连通，室内换热器1与过冷器4之间的连接管路通过经过过冷器4的第二支路与压缩腔室31连通。As shown in Figure 1, the subcooler 4 is arranged between the indoor heat exchanger 1 and the outdoor heat exchanger 2, and the indoor heat exchanger 1 and the outdoor heat exchanger 2 are connected through the first branch through the subcooler 4 , The connecting pipeline between the indoor heat exchanger 1 and the subcooler 4 communicates with the compression chamber 31 through a second branch passing through the subcooler 4.
进一步地，每级压缩腔室31分别通过单独的连接管路与第二支路连通。这样可以将通过第二支路引来的制冷剂分别送入离心压缩机3的每级压缩腔室31中，实现提高每级压缩腔室31的压缩比的作用，进而提高多级离心压缩机3的总压缩比。Further, each stage of the compression chamber 31 is respectively communicated with the second branch through a separate connecting pipeline. In this way, the refrigerant introduced through the second branch can be sent to each stage of the compression chamber 31 of the centrifugal compressor 3, so as to improve the compression ratio of each stage of the compression chamber 31, thereby improving the multi-stage centrifugal compressor 3. The total compression ratio.
可选地，压缩腔室31与第二支路的连通管路上设有用于调节通流流量的第一电磁阀9。进一步可选地，每级压缩腔室31与第二支路的连通管路上均设有用于调节通流流量的第一电磁阀9，这样可以实现每级压缩腔室31的独立控制，可以根据实际需要控制送入每级压缩腔室31的流量。Optionally, the communication pipeline between the compression chamber 31 and the second branch is provided with a first solenoid valve 9 for adjusting the flow rate. Further optionally, the communication pipeline between each stage of compression chamber 31 and the second branch is provided with a first solenoid valve 9 for adjusting the flow rate, so that independent control of each stage of compression chamber 31 can be realized according to It is actually necessary to control the flow rate into the compression chamber 31 of each stage.
可选地，离心压缩机3还包括电机和用于存放电机的电机腔室32，第二支路与电机腔室32连通。这样设置的好处是，可以将一部分制冷剂送入电机腔室32内，以对电机腔室32内的电机进行冷却，避免由于温度太高而对离心压缩机3的轴承、机壳等零部件造成损坏，影响离心压缩机3的使用寿命。Optionally, the centrifugal compressor 3 further includes a motor and a motor chamber 32 for storing the motor, and the second branch is in communication with the motor chamber 32. The advantage of this arrangement is that a part of the refrigerant can be sent into the motor chamber 32 to cool the motor in the motor chamber 32, and avoid the bearing, casing and other parts of the centrifugal compressor 3 due to too high temperature. Cause damage and affect the service life of the centrifugal compressor 3.
进一步地，第二支路与电机腔室32之间的连通管路上设有用于调节通流流量的第二电磁阀10。通过设置第二电磁阀10，可以根据实际需要控制向电机腔室32内送入制冷剂的流量。Furthermore, the communication pipeline between the second branch and the motor chamber 32 is provided with a second solenoid valve 10 for adjusting the flow rate. By providing the second solenoid valve 10, the flow rate of the refrigerant fed into the motor chamber 32 can be controlled according to actual needs.
可选地，电机腔室32与离心压缩机3的进口连通。这样可以使送入电机腔室32的制冷剂在冷却电机之后再送入压缩腔室31，实现充分利用。Optionally, the motor chamber 32 communicates with the inlet of the centrifugal compressor 3. In this way, the refrigerant sent into the motor chamber 32 can be sent to the compression chamber 31 after cooling the motor, so as to achieve full utilization.
可选地，空调***还包括设置在室外换热器2与过冷器4之间的第二节流元件6和/或室内换热器1与过冷器4之间的第三节流元件7。Optionally, the air conditioning system further includes a second throttling element 6 arranged between the outdoor heat exchanger 2 and the subcooler 4 and/or a third throttling element between the indoor heat exchanger 1 and the subcooler 4 7.
第二节流元件6和第三节流元件7可以采用电子膨胀阀等。The second throttle element 6 and the third throttle element 7 may be electronic expansion valves or the like.
可选地，空调***包括多个并联连接的室内换热器1，形成多联机空调***。Optionally, the air conditioning system includes a plurality of indoor heat exchangers 1 connected in parallel to form a multi-line air conditioning system.
可选地，空调***还包括四通阀8，四通阀8用于连接室内换热器1、室外换热器2、离心压缩机3的进口和离心压缩机3的出口。通过设置四通阀8，可以实现空调***在制冷模式和制热模式之间的切换。Optionally, the air conditioning system further includes a four-way valve 8 for connecting the indoor heat exchanger 1, the outdoor heat exchanger 2, the inlet of the centrifugal compressor 3 and the outlet of the centrifugal compressor 3. By setting the four-way valve 8, the air conditioning system can be switched between the cooling mode and the heating mode.
下面结合附图1～3对本公开空调***的一个实施例的工作过程进行说明：The working process of an embodiment of the air-conditioning system of the present disclosure will be described below in conjunction with accompanying drawings 1 to 3:
如图1所示，空调***包括室内换热器1、室外换热器2、离心压缩机3、过冷器4、第一节流元件5、第二节流元件6、第三节流元件7、四通阀8、第一电磁阀9、第 二电磁阀10和气液分离器11。As shown in Figure 1, the air conditioning system includes an indoor heat exchanger 1, an outdoor heat exchanger 2, a centrifugal compressor 3, a subcooler 4, a first throttling element 5, a second throttling element 6, and a third throttling element 7. Four-way valve 8, first solenoid valve 9, second solenoid valve 10 and gas-liquid separator 11.
室内换热器1包括四台，室内换热器1与室外换热器2通过第一支路连接，第一支路上设有第二节流元件6和第三节流元件7，且过冷器4也设置在第一支路上。第三节流元件7和过冷器4之间的连接管路通过第二支路与离心压缩机3连接，第一节流元件5设置在第二支路上，第一节流元件5的一端与第三节流元件7和过冷器4之间的连接管路连接，第一节流元件5的另一端与过冷器4连接，过冷器4与离心压缩机3的压缩腔室31和电机腔室32连通。第二支路与每级压缩腔室31分别通过独立的连接管路连接，且每条连接管路上均设有第一电磁阀9。第二支路还与电机腔室32连通，连通管路上设有第二电磁阀10。四通阀8连通室内换热器1、室外换热器2、离心压缩机3的进口和离心压缩机3的出口。离心压缩机3的上游还设有气液分离器11，用于对进入离心压缩机3的制冷剂进行汽液分离。The indoor heat exchanger 1 includes four. The indoor heat exchanger 1 and the outdoor heat exchanger 2 are connected by a first branch. The first branch is provided with a second throttling element 6 and a third throttling element 7, and it is subcooled. The device 4 is also arranged on the first branch road. The connecting pipeline between the third throttle element 7 and the subcooler 4 is connected to the centrifugal compressor 3 through the second branch. The first throttle element 5 is arranged on the second branch, and one end of the first throttle element 5 Connected to the connecting pipeline between the third throttle element 7 and the subcooler 4, the other end of the first throttle element 5 is connected to the subcooler 4, and the subcooler 4 is connected to the compression chamber 31 of the centrifugal compressor 3 It communicates with the motor chamber 32. The second branch is connected to each stage of the compression chamber 31 through independent connecting pipelines, and each connecting pipeline is provided with a first solenoid valve 9. The second branch is also connected to the motor chamber 32, and a second solenoid valve 10 is provided on the communicating pipeline. The four-way valve 8 communicates with the indoor heat exchanger 1, the outdoor heat exchanger 2, the inlet of the centrifugal compressor 3 and the outlet of the centrifugal compressor 3. A gas-liquid separator 11 is also provided upstream of the centrifugal compressor 3 to separate the refrigerant entering the centrifugal compressor 3 from vapor-liquid.
如图2所示，在制冷模式下，从室外换热器2(冷凝器)出来的制冷剂进入过冷器4，从过冷器4出来后分为两路，主路为制冷回路，支路为冷却电机和向压缩腔室31喷气的支路，这两路制冷剂在过冷器4中进行热交换。主路制冷剂经过冷器4充分冷却，制冷剂的过冷度提高，经第三节流元件7降压后进入室内换热器1(蒸发器)蒸发，然后通过四通阀8、气液分离器11进入离心压缩机3内进行多级压缩过程。由于主路制冷剂经过冷器4充分过冷，因此室内换热器1(蒸发器)的进、出口之间的焓差增大，可从室内环境中吸收更多热量，进而降低室内温度，从而提高制冷能力。支路制冷剂经第一节流元件5节流降压后再进入过冷器4进行换热蒸发，从过冷器4出来后分为两个支路，一路进入电机腔室32用于冷却电机，从电机腔室32出来的制冷剂汇入主路制冷剂，经气液分离器11进入离心压缩机3；另一路喷入压缩腔室31，用于控制离心压缩机3的排气量在合理范围内。经离心压缩机3多级压缩后的制冷剂，经四通阀8进入室外换热器2(冷凝器)，由此构成完整的制冷循环。As shown in Figure 2, in the cooling mode, the refrigerant coming out of the outdoor heat exchanger 2 (condenser) enters the subcooler 4, and after coming out of the subcooler 4, it is divided into two paths. The main path is the refrigeration circuit, and the branch The circuit is a branch circuit for cooling the motor and blowing air into the compression chamber 31. The two refrigerants exchange heat in the subcooler 4. The main circuit refrigerant is fully cooled by the cooler 4, and the subcooling degree of the refrigerant is increased. After the pressure is reduced by the third throttle element 7, it enters the indoor heat exchanger 1 (evaporator) to evaporate, and then passes through the four-way valve 8, gas-liquid The separator 11 enters the centrifugal compressor 3 to perform a multi-stage compression process. Since the main circuit refrigerant is sufficiently subcooled by the cooler 4, the enthalpy difference between the inlet and outlet of the indoor heat exchanger 1 (evaporator) increases, which can absorb more heat from the indoor environment, thereby reducing the indoor temperature. Thereby improving the cooling capacity. The branch refrigerant enters the subcooler 4 after being throttled and reduced in pressure by the first throttling element 5 for heat exchange and evaporation. After coming out of the subcooler 4, it is divided into two branches, one of which enters the motor chamber 32 for cooling. Motor, the refrigerant from the motor chamber 32 merges into the main circuit refrigerant and enters the centrifugal compressor 3 through the gas-liquid separator 11; the other is injected into the compression chamber 31 to control the displacement of the centrifugal compressor 3 Within a reasonable range. The refrigerant after multi-stage compression by the centrifugal compressor 3 enters the outdoor heat exchanger 2 (condenser) through the four-way valve 8, thereby forming a complete refrigeration cycle.
如图3所示，在制热模式下，从室内换热器1(冷凝器)放热后出来的制冷剂分为两路，主路制冷剂液体直接进入过冷器4，支路制冷剂经第一节流元件5节流降压后再进入过冷器4，这两部分制冷剂在过冷器4中进行热交换。主路制冷剂进一步过冷，经第二节流元件6降压后进入室外换热器2(蒸发器)，然后通过四通阀8和气液分离器11进入离心压缩机3。支路制冷剂在过冷器4内吸热蒸发，又分为两个支路，其中一支路进入电机腔室32用于冷却电机、降低电机温升，从电机腔室32出来的制冷剂汇入主路制冷剂，经气液分离器11进入离心压缩机3；另一支路从离心压缩机3 的喷射口喷入各级压缩腔室31，控制排气温度在合理范围之内。主路制冷剂和支路制冷剂在压缩腔室31内混合，经多级压缩后排出，经四通阀8进入室内换热器1(冷凝器)，由此构成封闭的喷气增焓制热循环。通过喷气增焓作用，离心压缩机3的制冷剂吸气量增大，离心压缩机3的做功增多，室内换热器(冷凝器)的换热量增大，制热能力显著提高，保证低温制热不衰减。制冷剂喷入离心压缩机3的中压腔室，并与压缩腔室内的原制冷剂相混合，从而降低排气温度，保障机组安全可靠运行。As shown in Figure 3, in the heating mode, the refrigerant coming out of the indoor heat exchanger 1 (condenser) is divided into two paths, the main refrigerant liquid directly enters the subcooler 4, and the branch refrigerant The first throttle element 5 throttling and reducing the pressure before entering the subcooler 4, and the two parts of refrigerant exchange heat in the subcooler 4. The refrigerant in the main circuit is further subcooled and enters the outdoor heat exchanger 2 (evaporator) after being depressurized by the second throttle element 6, and then enters the centrifugal compressor 3 through the four-way valve 8 and the gas-liquid separator 11. The branch refrigerant absorbs heat and evaporates in the subcooler 4, and is divided into two branches, one of which enters the motor chamber 32 to cool the motor and reduce the temperature rise of the motor. The refrigerant exits the motor chamber 32 The refrigerant entering the main circuit enters the centrifugal compressor 3 through the gas-liquid separator 11; the other branch is sprayed from the injection port of the centrifugal compressor 3 into the compression chambers 31 at various levels to control the exhaust temperature within a reasonable range. The main refrigerant and the branch refrigerant are mixed in the compression chamber 31 and discharged after multi-stage compression, and enter the indoor heat exchanger 1 (condenser) through the four-way valve 8, thereby forming a closed jet enthalpy heating cycle. Through the effect of jet enthalpy, the refrigerant suction of the centrifugal compressor 3 increases, the work of the centrifugal compressor 3 increases, the heat exchange of the indoor heat exchanger (condenser) increases, the heating capacity is significantly improved, and the low temperature is guaranteed. Heating does not decay. The refrigerant is injected into the intermediate pressure chamber of the centrifugal compressor 3 and is mixed with the original refrigerant in the compression chamber, thereby reducing the exhaust temperature and ensuring the safe and reliable operation of the unit.
通过对本公开空调***的多个实施例的说明，可以看到本公开空调***实施例至少具有以下一种或多种优点：Through the description of multiple embodiments of the air conditioning system of the present disclosure, it can be seen that the embodiments of the air conditioning system of the present disclosure have at least one or more of the following advantages:
1、采用多级压缩，有效解决了普通单级压缩***压比低的缺陷，将高压力比分级降解，将每级压缩的压比控制在合理范围内，保证***可靠运行；1. The use of multi-stage compression effectively solves the defect of low pressure ratio of ordinary single-stage compression system, degrades the high pressure ratio in stages, and controls the pressure ratio of each stage of compression within a reasonable range to ensure the reliable operation of the system;
2、通过喷气增焓，增大了离心压缩机的制冷剂流量，离心压缩机做功增多，制冷和制热能力显著提高；2. The enthalpy of the jet is increased, the refrigerant flow of the centrifugal compressor is increased, the work of the centrifugal compressor is increased, and the cooling and heating capacity is significantly improved;
3、通过向电机腔室引入制冷剂可使电机冷却，降低电机温升，防止电机温升过高而损坏，提高离心压缩机的正常使用寿命，提高离心压缩机运行的可靠性。3. The introduction of refrigerant into the motor chamber can cool the motor, reduce the temperature rise of the motor, prevent the motor from being damaged by excessive temperature rise, improve the normal service life of the centrifugal compressor, and improve the reliability of the centrifugal compressor.
最后应当说明的是：以上实施例仅用以说明本公开的技术方案而非对其限制；尽管参照较佳实施例对本公开进行了详细的说明，所属领域的普通技术人员应当理解：在不脱离本公开原理的前提下，依然可以对本公开的具体实施方式进行修改或者对部分技术特征进行等同替换，这些修改和等同替换均应涵盖在本公开请求保护的技术方案范围当中。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit it; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art should understand that: Under the premise of the principles of the present disclosure, the specific implementations of the present disclosure can still be modified or some technical features can be equivalently replaced, and these modifications and equivalent replacements shall be covered by the scope of the technical solution claimed by the present disclosure.

Claims (10)

  1. 一种空调***，包括：An air conditioning system, including:
    室内换热器(1)；Indoor heat exchanger (1);
    室外换热器(2)；Outdoor heat exchanger (2);
    离心压缩机(3)，包括多级压缩腔室(31)；Centrifugal compressor (3), including multi-stage compression chamber (31);
    过冷器(4)，与所述离心压缩机(3)的进口连通，用于对来自所述室内换热器(1)或所述室外换热器(2)的制冷剂进行换热，以将换热后的制冷剂送入所述离心压缩机(3)；和The subcooler (4) is in communication with the inlet of the centrifugal compressor (3) and is used to exchange heat for the refrigerant from the indoor heat exchanger (1) or the outdoor heat exchanger (2), To send the heat-exchanged refrigerant to the centrifugal compressor (3); and
    第一节流元件(5)，设置在所述过冷器(4)的上游，用于对进入所述过冷器(4)的制冷剂进行节流。The first throttle element (5) is arranged upstream of the subcooler (4) and is used to throttle the refrigerant entering the subcooler (4).
  2. 根据权利要求1所述的空调***，其中，所述过冷器(4)设置在所述室内换热器(1)和所述室外换热器(2)之间，且所述室内换热器(1)和所述室外换热器(2)通过经过所述过冷器(4)的第一支路连通，所述室内换热器(1)与所述过冷器(4)之间的连接管路通过经过所述过冷器(4)的第二支路与所述压缩腔室(31)连通。The air conditioning system according to claim 1, wherein the subcooler (4) is arranged between the indoor heat exchanger (1) and the outdoor heat exchanger (2), and the indoor heat exchange The indoor heat exchanger (1) and the outdoor heat exchanger (2) are connected through the first branch through the subcooler (4). The connecting pipeline therebetween communicates with the compression chamber (31) through a second branch that passes through the subcooler (4).
  3. 根据权利要求2所述的空调***，其中，每级所述压缩腔室(31)分别通过单独的连接管路与所述第二支路连通。The air conditioning system according to claim 2, wherein the compression chamber (31) of each stage is respectively communicated with the second branch through a separate connecting pipeline.
  4. 根据权利要求3所述的空调***，其中，所述压缩腔室(31)与所述第二支路的连通管路上设有用于调节通流流量的第一电磁阀(9)。The air conditioning system according to claim 3, wherein the communication pipeline between the compression chamber (31) and the second branch is provided with a first solenoid valve (9) for adjusting the flow rate.
  5. 根据权利要求2所述的空调***，其中，所述离心压缩机(3)还包括电机和用于存放电机的电机腔室(32)，所述第二支路与所述电机腔室(32)连通。The air conditioning system according to claim 2, wherein the centrifugal compressor (3) further comprises a motor and a motor chamber (32) for storing the motor, and the second branch is connected to the motor chamber (32). ) Connected.
  6. 根据权利要求5所述的空调***，其中，所述第二支路与所述电机腔室(32)之间的连通管路上设有用于调节通流流量的第二电磁阀(10)。The air conditioning system according to claim 5, wherein a second solenoid valve (10) for adjusting the flow rate is provided on the communication pipeline between the second branch and the motor chamber (32).
  7. 根据权利要求5所述的空调***，其中，所述电机腔室(32)与所述离心压缩机(3)的进口连通。The air conditioning system according to claim 5, wherein the motor chamber (32) is in communication with the inlet of the centrifugal compressor (3).
  8. 根据权利要求1所述的空调***，还包括设置在所述室外换热器(2)与所述过冷器(4)之间的第二节流元件(6)和/或所述室内换热器(1)与所述过冷器(4)之间的第三节流元件(7)。The air conditioning system according to claim 1, further comprising a second throttling element (6) provided between the outdoor heat exchanger (2) and the subcooler (4) and/or the indoor heat exchanger The third throttling element (7) between the heat exchanger (1) and the supercooler (4).
  9. 根据权利要求1所述的空调***，包括多个并联连接的所述室内换热器(1)。The air conditioning system according to claim 1, comprising a plurality of said indoor heat exchangers (1) connected in parallel.
  10. 根据权利要求1所述的空调***，还包括四通阀(8)，所述四通阀(8)用于连接所述室内换热器(1)、所述室外换热器(2)、所述离心压缩机(3)的进口和所述离心压缩机(3)的出口。The air conditioning system according to claim 1, further comprising a four-way valve (8), the four-way valve (8) is used to connect the indoor heat exchanger (1), the outdoor heat exchanger (2), The inlet of the centrifugal compressor (3) and the outlet of the centrifugal compressor (3).
PCT/CN2019/091494 2019-02-12 2019-06-17 Air conditioning system WO2020164210A1 (en)

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