WO2019200951A1 - Système de pompe à chaleur de climatisation et procédé de commande - Google Patents

Système de pompe à chaleur de climatisation et procédé de commande Download PDF

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Publication number
WO2019200951A1
WO2019200951A1 PCT/CN2018/121538 CN2018121538W WO2019200951A1 WO 2019200951 A1 WO2019200951 A1 WO 2019200951A1 CN 2018121538 W CN2018121538 W CN 2018121538W WO 2019200951 A1 WO2019200951 A1 WO 2019200951A1
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WIPO (PCT)
Prior art keywords
valve
compressor
communication
line
pump system
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PCT/CN2018/121538
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English (en)
Chinese (zh)
Inventor
刘华
张仕强
焦华超
熊建国
武连发
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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 WO2019200951A1 publication Critical patent/WO2019200951A1/fr

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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
    • F25B41/20—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
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves

Definitions

  • the invention relates to the technical field of air treatment equipment, in particular to an air conditioning heat pump system and a control method.
  • Air-conditioning heat pump products have become more and more widely used as heating and heating because of their high energy efficiency and environmental protection. They have been widely used in warm areas, but they are rarely used in cold regions. When the heating operation is performed in a cold area, the outdoor ambient temperature is extremely low, resulting in a low evaporation pressure of the system, and the compression ratio of the conventional single-stage vapor compression refrigeration cycle system limits the increase of the condensing pressure, thereby causing a problem of poor heating performance.
  • the lower evaporation pressure results in a larger specific volume of refrigerant on the suction side of the compressor, less refrigerant mass flow in the compressor cycle, and the refrigerant cycle cannot effectively take away the heat dissipated by the compressor motor, resulting in a compressor.
  • the motor cannot be cooled well and cannot be operated reliably for a long time.
  • an air conditioning heat pump system and a control method capable of achieving long-term reliable operation in a cold area are provided.
  • An air conditioning heat pump system includes a heat exchange circulation line, a gas supply line, and a liquid discharge line
  • the heat exchange circulation line includes a compressor, an indoor heat exchanger, a throttle device, and an outdoor heat exchanger, and the increase
  • One end of the ⁇ line is in communication with the gas supply port of the compressor, and the other end is in communication with a communication line between the indoor heat exchanger and the throttling device, and one end of the gas supply line is supplemented with the compressor a gas port is connected, the other end is in communication with an exhaust port of the compressor, and one end of the liquid discharge pipe is in communication with a communication line between the indoor heat exchanger and the throttling device, and the other end is The suction port of the compressor is connected.
  • the air conditioning heat pump system further includes a boosting pipeline, one end of the boosting pipeline is in communication with a gas supply port of the compressor, and the other end is connected to the communication line between the indoor heat exchanger and the throttle device Connected.
  • the boosting pipeline includes a boosting valve, an economizer, and a boosting throttle valve, the economizer including a first heat exchange conduit and a second heat exchange conduit, one end of the boosting valve and the compression
  • the air supply port of the machine is connected, and the other end is in communication with one end of the second heat exchange tube, one end of the first heat exchange line is in communication with the indoor heat exchanger, and the other end is connected to the throttling device.
  • One end of the throttle valve is connected to a communication line between the indoor heat exchanger and the first heat exchange tube, and the other end is separated from the second heat exchange tube by the reinforcing valve One end is connected.
  • the air supply line includes an air supply valve, one end of the air supply valve is in communication with an air supply port of the compressor, and the other end is in communication with an exhaust port of the compressor.
  • the liquid discharge pipe includes a liquid discharge valve, one end of the liquid discharge valve is in communication with an intake port of the compressor, and the other end is connected with a communication line between the indoor heat exchanger and the throttle device Connected.
  • the boosting pipeline includes a boosting valve, an economizer, and a boosting throttle valve, the economizer including a first heat exchange conduit and a second heat exchange conduit, one end of the boosting valve and the compression
  • the air supply port of the machine is connected, and the other end is in communication with one end of the second heat exchange tube, one end of the first heat exchange line is in communication with the indoor heat exchanger, and the other end is connected to the throttling device.
  • One end of the throttle valve is connected to a communication line between the indoor heat exchanger and the first heat exchange tube, and the other end is separated from the second heat exchange tube by the reinforcing valve
  • One end of the air supply line includes an air supply valve, one end of the air supply valve is in communication with an air supply port of the compressor, and the other end is in communication with an exhaust port of the compressor
  • the liquid discharge line includes a liquid discharge valve, one end of which is in communication with an intake port of the compressor, and the other end is in communication with a communication line between the indoor heat exchanger and the throttle device.
  • the enthalpy valve, the supplemental valve, and the liquid discharge valve are electronic expansion valves or solenoid valves.
  • the enthalpy throttle valve is an electronic expansion valve.
  • the air inlet of the compressor is provided with a first pressure sensor, the air inlet of the compressor is provided with a second pressure sensor, and the air outlet of the compressor is provided with a third pressure sensor and an exhaust temperature sensor.
  • An outdoor ambient temperature sensor is disposed on the outdoor heat exchanger.
  • the enthalpy throttle valve and the enthalpy valve are opened, and the air supply valve and the liquid discharge valve are closed;
  • the throttle valve In the high pressure ratio mode, the throttle valve is closed, and the makeup valve and the liquid discharge valve are opened.
  • the control method further includes:
  • the air conditioning heat pump system enters the high pressure ratio mode.
  • the control method further includes: in the high pressure ratio mode:
  • the opening of the air supply valve is adjusted according to the air supply pressure P.
  • the control method further includes: in the high pressure ratio mode:
  • the exhaust gas temperature t2 is detected, and the liquid discharge valve opening degree is adjusted so that t2 is in the range of ⁇ Tmin, Tmax ⁇ .
  • the air-conditioning heat pump system and the control method provided by the invention can ensure the normal operation of the air-conditioning heat pump system at a lower ambient temperature by setting the enrichment pipeline, and improve the refrigerant mass circulation amount of the compressor at the same speed, and utilize more The refrigerant takes away the heat of the compressor motor, so that the compressor motor can be cooled better and the exhaust temperature is lowered.
  • the pressure at the end of compression of the compressor can be increased, thereby realizing The system pressure ratio is increased, and part of the refrigerant liquid enters the compressor through the liquid discharge valve, which increases the refrigerant circulation amount and reduces the compressor suction superheat degree, thereby reducing the exhaust superheat degree.
  • FIG. 1 is a schematic structural view of an air conditioning heat pump system of an air conditioning heat pump system and a control method provided by the present invention
  • the air conditioning heat pump system shown in FIG. 1 includes a heat exchange circulation line 1, an air supply line 3, and a liquid discharge line 4, and the heat exchange circulation line 1 includes a compressor 11, an indoor heat exchanger 13, and a throttling
  • a pipeline is connected, one end of the gas supply line 3 is in communication with the gas supply port of the compressor 11, and the other end is in communication with the exhaust port of the compressor 11, and one end of the liquid injection pipe 4 is exchanged with the indoor
  • the communication line between the heat exchanger 13 and the throttling device 14 is in communication, and the other end is in communication with the intake port of the compressor 11, and the compressor can be increased by providing the supplementary gas line 3 and the liquid discharge line 4.
  • the pressure at the end of the compression of 11 further increases the system pressure ratio, and at the same time, part of the refrigerant liquid enters the compressor 11 through the liquid discharge valve 41, thereby increasing the refrigerant circulation amount and reducing the suction superheat of the compressor 11, thereby reducing the exhaust gas.
  • the air conditioning heat pump system further includes an augmentation line 2, one end of which is in communication with a gas supply port of the compressor 11, and the other end is connected to the indoor heat exchanger 13 and the throttling device 14 The communication line between the two is connected.
  • the heat exchange circulation line 1 further includes a four-way valve 12 capable of switching the heat exchange circulation line 1 to perform a heating cycle or a refrigeration cycle.
  • the boosting line 2 includes a boosting valve 21, an economizer 22, and an augmentation throttle valve 23, the economizer 22 including a first heat exchange line 24 and a second heat exchange line 25, the boosting One end of the valve 21 is in communication with the air supply port of the compressor 11, and the other end is in communication with one end of the second heat exchange line 25, and one end of the first heat exchange line 24 is connected to the indoor heat exchanger 13 The other end is in communication with the throttling device 14, and one end of the entraining throttle valve 23 is in communication with a communication line between the indoor heat exchanger 13 and the first heat exchange line 24, and the other end
  • the medium-temperature intermediate-pressure refrigerant liquid after being condensed in the indoor heat exchanger 13 is divided into two parts, and the part is connected to the economizer 22, and communicates with the one end of the second heat exchange line 25 away from the helium-increasing valve 21.
  • the port is further cooled, and a part of the throttle valve 23 is throttled and depressurized, and then enters the connection port of the economizer 22. Since the temperature after throttling and depressurization is lower than the refrigerant liquid at the connection port, heat exchange occurs with the absorption. The heat is evaporated to a low temperature and low pressure, and the refrigerant gas flows out from the connection port, and enters the compressor 11 through the enthalpy valve 21 Mixing with the refrigerant gas that has been compressed inside the compressor 11, and continuing to be compressed, the low-temperature low-pressure refrigerant gas sucked through the air supply port increases the refrigerant mass circulation amount of the compressor 11 at the same rotational speed, thereby improving the system. The thermal effect, while increasing the amount of refrigerant entering the compressor, utilizes more refrigerant to carry away the heat of the compressor 11 motor, allowing the compressor 11 motor to be better cooled and lower the exhaust temperature.
  • the air supply line 3 includes an air supply valve 31, one end of which is in communication with the air supply port of the compressor 11, and the other end of which is in communication with the exhaust port of the compressor 11, and passes through the air supply valve 31.
  • the exhaust gas of the partial compressor 11 can be directly sent to the air supply port of the compressor 11, and the compression ratio of the compressor 11 can be increased, thereby improving the system pressure ratio.
  • the conventional single-stage compressor 11 refrigeration cycle system is compressed.
  • the refrigerant pressure drawn by the suction port of the machine 11 is P1
  • the pressure when the compression stroke is performed to the position of the air inlet of the compressor 11 is P2
  • the pressure when the compressor 11 stroke ends until the discharge of the compressor 11 is P3
  • the air-conditioning heat pump system keeps P1 unchanged, and the high-temperature and high-pressure refrigerant gas that is inhaled by the air supply port is mixed with the refrigerant gas of half of the internal compression stroke of the compressor 11, and the pressure after mixing is P2'>P2, so finally
  • the pressure P3'>P3 at the end of compression achieves an increase in the system pressure ratio, ie P3'/P1>P3/P1.
  • the liquid discharge line 4 includes a liquid discharge valve 41, one end of which is in communication with an intake port of the compressor 11, and the other end is connected to the indoor heat exchanger 13 and the throttle device 14 A communication line between the two is connected, and a part of the refrigerant liquid condensed by the indoor heat exchanger 13 passes through the liquid discharge valve 41 to enter the suction port of the compressor 11.
  • the boosting line 2 includes a boosting valve 21, an economizer 22, and an augmentation throttle valve 23, the economizer 22 including a first heat exchange line 24 and a second heat exchange line 25, the boosting One end of the valve 21 is in communication with the air supply port of the compressor 11, and the other end is in communication with one end of the second heat exchange line 25, and one end of the first heat exchange line 24 is connected to the indoor heat exchanger 13
  • the other end is in communication with the throttling device 14, and one end of the entraining throttle valve 23 is in communication with a communication line between the indoor heat exchanger 13 and the first heat exchange line 24, and the other end
  • the gas supply line 3 includes an air supply valve 31, and one end of the air supply valve 31 and the compressor 11
  • the gas port is connected, and the other end is in communication with the exhaust port of the compressor 11.
  • the liquid discharge pipe 4 includes a liquid discharge valve 41, and one end of the liquid discharge valve 41 communicates with the air intake port of the compressor 11. The other end is
  • the enthalpy valve 21, the supplemental valve 31 and the liquid discharge valve 41 are electronic expansion valves or solenoid valves or other structures capable of regulating the flow rate, preferably electronic expansion valves, to achieve pressure and/or flow rate adjustment. .
  • the enthalpy throttle valve 23 is an electronic expansion valve for the purpose of throttling and pressure reduction and flow regulation.
  • the air inlet of the compressor 11 is provided with a first pressure sensor for detecting the suction pressure of the compressor 11, and the air inlet of the compressor 11 is provided with a second pressure sensor for detecting the compensation of the air conditioning heat pump system.
  • Air pressure, the exhaust port of the compressor 11 is provided with a third pressure sensor (for detecting the exhaust pressure of the compressor 11) and an exhaust temperature sensor (for detecting the exhaust temperature of the compressor 11),
  • the outdoor heat exchanger 15 is provided with an outdoor ambient temperature sensor for detecting the outdoor ambient temperature.
  • the enthalpy throttle valve 23, the makeup valve 31, and the liquid discharge valve 41 are closed, and the high-temperature high-pressure refrigerant gas discharged from the compressor 11 passes through the oil separator to enter the four-way valve 12, and flows through
  • the indoor heat exchanger 13 condenses and releases heat, becomes a medium-temperature medium-pressure refrigerant liquid, and then passes through a throttling member to become a low-temperature low-pressure refrigerant liquid, and enters the outdoor heat exchanger 15 to evaporate and absorb heat, thereby becoming a low-temperature low-pressure refrigerant gas.
  • the four-way valve 12 enters the suction port of the compressor 11, and the compressor 11 compresses the low-temperature low-pressure refrigerant gas into a high-temperature high-pressure refrigerant gas and discharges it;
  • the enthalpy throttle valve 23 and the enthalpy valve 21 are opened, the air supply valve 31 and the liquid discharge valve 41 are closed, and the medium temperature medium pressure refrigeration is condensed in the indoor heat exchanger 13
  • the liquid is divided into two parts, a part of which enters the first heat exchange line 24 to be further cooled, and a part of which is throttled and depressurized by the helium-increasing throttle valve 23 and then enters the second heat exchange line 25, due to the throttling and depressurization
  • the temperature is lower than the temperature of the refrigerant liquid in the first heat exchange line 24, heat exchange is performed, and the refrigerant gas which absorbs heat and evaporates into a low temperature and a low pressure flows out from the second heat exchange line 25, and passes through the humidifying valve 21 to be compressed.
  • the air inlet of the machine 11 is mixed with the refrigerant gas that has been compressed inside the compressor 11 and continues to be compressed;
  • the enthalpy throttle valve 23 is closed, the makeup valve 31, the liquid discharge valve 41 are opened, and the high temperature and high pressure refrigerant gas discharged from the compressor 11 is partially compressed by the air supply valve 31.
  • the air inlet of the machine 11 is mixed with the refrigerant gas which has been compressed inside the compressor 11, and is continuously compressed and discharged from the exhaust port of the compressor 11, which is a supplementary gas cycle; a part of the refrigerant liquid after the indoor heat exchanger 13 is condensed After passing through the liquid discharge valve 41, it enters the suction port of the compressor 11, which is a liquid discharge cycle.
  • the control method further includes:
  • the air conditioning heat pump system enters the high pressure ratio mode.
  • the control method further includes: in the high pressure ratio mode:
  • the opening degree of the makeup valve 31 is adjusted according to the supplemental air pressure P, and the adjustment of the opening degree is used to adjust so that the current supplemental air pressure satisfies the target intermediate supplemental gas pressure P.
  • the control method further includes: in the high pressure ratio mode:
  • the exhaust gas temperature t2 is detected, and the opening degree of the liquid discharge valve 41 is adjusted so that t2 is in the range of ⁇ Tmin, Tmax ⁇ .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

L'invention concerne un système de pompe à chaleur de climatisation et un procédé de commande, comprenant un pipeline de circulation d'échange de chaleur, un pipeline d'augmentation d'enthalpie, un pipeline de supplément d'air et un pipeline de pulvérisation de liquide, le pipeline de circulation d'échange de chaleur comprenant un compresseur, une soupape à quatre voies, un échangeur de chaleur interne, un dispositif d'étranglement et un échangeur de chaleur externe, et une extrémité du pipeline d'augmentation d'enthalpie communiquant avec un orifice de supplément d'air du compresseur. Par agancement du pipeline d'augmentation d'enthalpie, un fonctionnement normal peut être assuré lorsque le système de pompe à chaleur de climatisation est à une température ambiante basse, et la quantité de circulation de masse de fluide frigorigène du compresseur est augmentée à la même vitesse de rotation, de telle sorte qu'un moteur de compresseur est mieux refroidi, et la température d'échappement est réduite. La pression à la fin de la compression du compresseur peut être augmentée par l'agencement du pipeline de supplément d'air et du pipeline de pulvérisation de liquide, et le rapport de pression du système peut être davantage augmenté; et pendant ce temps, une partie du fluide frigorigène entre dans le compresseur par l'intermédiaire d'une soupape de pulvérisation de liquide, la quantité de circulation de fluide frigorigène est augmentée, le degré de surchauffe d'aspiration du compresseur est réduit, et le degré de surchauffe d'échappement est également réduit.
PCT/CN2018/121538 2018-04-20 2018-12-17 Système de pompe à chaleur de climatisation et procédé de commande WO2019200951A1 (fr)

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CN201810360663.2A CN108592463A (zh) 2018-04-20 2018-04-20 空调热泵系统及控制方法
CN201810360663.2 2018-04-20

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CN110953757A (zh) * 2019-12-25 2020-04-03 珠海格力电器股份有限公司 喷液增焓热泵机组及其控制方法
CN111023609A (zh) * 2019-11-25 2020-04-17 珠海格力节能环保制冷技术研究中心有限公司 一种空调系统和控制方法
CN112744049A (zh) * 2021-02-07 2021-05-04 郑州科林车用空调有限公司 一种适用于客车的补气增焓空调系统
CN114526539A (zh) * 2020-11-23 2022-05-24 广东美的制冷设备有限公司 补气控制方法、空调器及计算机可读存储介质
CN115200177A (zh) * 2022-05-27 2022-10-18 宁波奥克斯电气股份有限公司 补气增焓控制方法、装置及空调器

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CN108592463A (zh) * 2018-04-20 2018-09-28 珠海格力电器股份有限公司 空调热泵系统及控制方法
CN112013472A (zh) * 2019-05-30 2020-12-01 广东美的制冷设备有限公司 空调器及其控制方法
CN110285535B (zh) * 2019-06-24 2020-11-17 珠海格力电器股份有限公司 空调系统的增焓控制方法和装置
CN110848845B (zh) * 2019-11-18 2024-02-20 珠海格力电器股份有限公司 一种补气增焓热泵系统、控制方法和空调器
CN110966794B (zh) * 2019-11-19 2024-06-18 珠海格力电器股份有限公司 热泵系统、空调器及热泵系统的控制方法
CN111425969B (zh) * 2020-03-16 2021-04-02 珠海格力电器股份有限公司 热泵系统及其控制方法
CN111426101A (zh) * 2020-03-16 2020-07-17 科希曼电器有限公司 超低温环境下稳定运行的空气源热泵装置及其控制系统
CN113959082B (zh) * 2020-07-03 2023-05-30 广东美的制冷设备有限公司 空调器的控制方法、装置及计算机存储介质
CN112033035B (zh) * 2020-09-10 2021-07-20 珠海格力电器股份有限公司 制冷系统的喷液控制方法及冷凝机组
CN112460859B (zh) * 2020-12-10 2022-03-08 珠海格力电器股份有限公司 冷水机组及其控制方法

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CN111023609B (zh) * 2019-11-25 2023-12-12 珠海格力节能环保制冷技术研究中心有限公司 一种空调系统和控制方法
CN110953757A (zh) * 2019-12-25 2020-04-03 珠海格力电器股份有限公司 喷液增焓热泵机组及其控制方法
CN114526539A (zh) * 2020-11-23 2022-05-24 广东美的制冷设备有限公司 补气控制方法、空调器及计算机可读存储介质
CN114526539B (zh) * 2020-11-23 2024-05-28 广东美的制冷设备有限公司 补气控制方法、空调器及计算机可读存储介质
CN112744049A (zh) * 2021-02-07 2021-05-04 郑州科林车用空调有限公司 一种适用于客车的补气增焓空调系统
CN115200177A (zh) * 2022-05-27 2022-10-18 宁波奥克斯电气股份有限公司 补气增焓控制方法、装置及空调器

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