WO2018040579A1 - 空调器系统和空调器系统的控制方法 - Google Patents

空调器系统和空调器系统的控制方法 Download PDF

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Publication number
WO2018040579A1
WO2018040579A1 PCT/CN2017/080830 CN2017080830W WO2018040579A1 WO 2018040579 A1 WO2018040579 A1 WO 2018040579A1 CN 2017080830 W CN2017080830 W CN 2017080830W WO 2018040579 A1 WO2018040579 A1 WO 2018040579A1
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WIPO (PCT)
Prior art keywords
air conditioner
port
heat exchanger
conditioner system
throttle member
Prior art date
Application number
PCT/CN2017/080830
Other languages
English (en)
French (fr)
Inventor
王新利
许永锋
熊美兵
冯明坤
李�根
赵浩伟
Original Assignee
广东美的暖通设备有限公司
美的集团股份有限公司
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Application filed by 广东美的暖通设备有限公司, 美的集团股份有限公司 filed Critical 广东美的暖通设备有限公司
Priority to EP17844887.4A priority Critical patent/EP3492840B1/en
Publication of WO2018040579A1 publication Critical patent/WO2018040579A1/zh
Priority to US16/282,321 priority patent/US10914486B2/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00Compression machines, plants or systems, with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20Casings or covers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02742Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02743Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using three four-way valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/31Low ambient temperatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2509Economiser valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2513Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19Pressures
    • F25B2700/193Pressures of the compressor
    • F25B2700/1931Discharge pressures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2106Temperatures of fresh outdoor air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2115Temperatures of a compressor or the drive means therefor
    • F25B2700/21152Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to the field of air conditioner technology, and in particular to an air conditioner system and a control method of an air conditioner system.
  • the compressor must be in an effective lubrication state at all times to ensure reliable operation of the system. If the compressor is in a small load operation for a long time, the lubricating oil of the system cannot be returned to the compressor in time, which may cause damage to the compressor due to poor lubrication, which affects the reliability of the entire unit.
  • the present invention aims to solve at least one of the technical problems existing in the prior art or related art.
  • an object of the present invention is to propose a new air conditioner system, which effectively avoids the problem of oil shortage damage of the compressor caused by long-time small-load operation of the air conditioner system, and can also enhance the low-temperature heating capability of the air conditioner system. .
  • Another object of the present invention is to provide a control method and a control device for an air conditioner system.
  • an air conditioner system comprising: a refrigeration system including at least a compressor, a first four-way valve, an outdoor heat exchanger, and an indoor heat exchanger; a second four-way valve, a first port of the second four-way valve is connected to a pipeline between the first four-way valve and the indoor heat exchanger, and a second port of the second four-way valve a first position connected to the line between the indoor heat exchanger and the outdoor heat exchanger; the auxiliary heat exchanger having a first passage and a second passage, the first port of the first passage and the a fourth port of the second four-way valve is in communication, and a second port of the first passage is connected to a second position on the pipeline between the indoor heat exchanger and the outdoor heat exchanger, the second passage a first port is connected to a third position on the pipeline between the indoor heat exchanger and the outdoor heat exchanger, and a second port of the second passage is connected to the outdoor heat exchanger
  • An air conditioner system by providing a second four-way valve and an auxiliary heat exchanger, and providing a first throttle member and a second throttle member such that the first throttle member is disposed in the first passage
  • the first throttle member and the second throttle member can be controlled to open and control the second fourth.
  • the first port of the valve is connected to the fourth port, so that the refrigerant after passing through the first four-way valve is divided into two branches, and one branch enters the auxiliary heat exchange after being throttled by the indoor heat exchanger and the second throttle member.
  • the second passage of the device, the other branch can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, and the two refrigerants exchange heat, that is, the refrigerant in the second passage passes through the second throttle member section
  • the flow therefore, evaporates in the auxiliary heat exchanger, and the refrigerant in the first passage is condensed, thereby increasing the evaporation pressure and the evaporation temperature of the air conditioner system, thereby avoiding oil shortage damage of the compressor caused by small load heating operation of the air conditioner system of question.
  • it can also improve the overall heat exchange capacity of the air conditioner unit, and enhance the low temperature heating capacity of the air conditioner system.
  • the first throttle member is disposed on the pipeline between the first port of the first passage and the fourth port of the second four-way valve, if the air conditioner system is cooled and operated in a small load operation state, Controlling the first throttle member and the second throttle member to open, and controlling the second of the second four-way valve
  • the port is connected to the fourth port, such that the refrigerant after passing through the outdoor heat exchanger is divided into two branches, and one branch is throttled by the outdoor heat exchanger and the second throttle member to enter the second passage of the auxiliary heat exchanger.
  • the other branch can directly enter the first passage of the auxiliary heat exchanger, and enters the indoor heat exchanger to evaporate heat exchange through the second four-way valve, and the two refrigerants in the auxiliary heat exchanger exchange heat, that is, in the second passage Since the refrigerant is throttled by the second throttle member, it is evaporated in the auxiliary heat exchanger, and the refrigerant in the first passage is condensed, thereby improving the evaporation pressure and the evaporation temperature of the air conditioner system, thereby avoiding the small load of the air conditioner system.
  • the problem of oil shortage of the compressor during cooling operation is provided.
  • the first throttle member and the second The throttle member is opened, and the second port of the second four-way valve is controlled to communicate with the fourth port, so that the refrigerant after passing through the indoor heat exchanger is divided into two branches, one branch passes through the indoor heat exchanger and the second section After the flow component is throttled, it enters the second passage of the auxiliary heat exchanger, and the other branch can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, and the two refrigerants exchange heat, that is, in the second passage Since the refrigerant is throttled by the second throttle member, it is evaporated in the auxiliary heat exchanger, and the refrigerant in the first passage is condensed, thereby increasing the evaporation pressure and the evaporation temperature of the air conditioner system, and effectively utilizing the heat of the condensed refrigerant.
  • the refrigeration system further includes a third throttle member and a gas-liquid separator; wherein four ports of the first four-way valve are respectively associated with an exhaust port of the compressor, a first port of the outdoor heat exchanger, a first port of the indoor heat exchanger, and an inlet of the gas-liquid separator, the second port of the outdoor heat exchanger passing through the third throttle member a second port of the indoor heat exchanger is in communication, and an outlet of the gas-liquid separator is connected to a gas return port of the compressor;
  • a second port of the second passage is connected to a pipe in which the first port of the outdoor heat exchanger is in communication with the first four-way valve, an inlet of the gas-liquid separator, and the first four-way valve
  • the connected conduit or the conduit of the gas-liquid separator is connected to the return port of the compressor.
  • the air conditioner system further includes: a controller connected to the first throttle member, the second throttle member, and the second four-way valve for Description The first throttle member, the second throttle member, and the second four-way valve are controlled.
  • the controller is specifically configured to: when the first throttle member is disposed on a pipeline between the second port of the first passage and the second position, If the air conditioner system is heating and running, and detecting that the outdoor ambient temperature is less than or equal to a first set temperature value, the exhaust superheat of the compressor is less than or equal to a first set superheat and continues for the first time For a predetermined period of time, the first throttle member and the second throttle member are controlled to open, and the second port of the second four-way valve is controlled to communicate with the fourth port.
  • the outdoor ambient temperature is less than or equal to the first setting.
  • the fixed temperature value, the exhaust superheat of the compressor is less than or equal to the first set superheat and lasts for a first predetermined period of time, then controlling the first throttle member and the second throttle member to open, and controlling the second four-way valve
  • the second port is connected to the fourth port such that the refrigerant after passing through the indoor heat exchanger is divided into two branches, and one branch is throttled by the indoor heat exchanger and the second throttle member and then enters the second of the auxiliary heat exchanger.
  • the passage, the other branch can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, and the two refrigerants exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member, so
  • the auxiliary heat exchanger evaporates, and the refrigerant in the first passage condenses, thereby improving the evaporation pressure and the evaporation temperature of the air conditioner system, effectively utilizing the heat of the condensed refrigerant, and improving the overall heat exchange amount of the air conditioner system.
  • the low temperature heating capacity of the air conditioner system is not limited to the air conditioner system.
  • the controller is specifically configured to: when the first throttle member is disposed on a pipeline between the second port of the first passage and the second position, Controlling the first throttle member and the second throttle member to open and controlling the second four-way valve if the air conditioner system is operating in heat and the air conditioner system is in a small load operation state
  • the first port is connected to the fourth port.
  • the air conditioner system when the first throttle member is disposed on the pipeline between the second port and the second position of the first passage, if the air conditioner system is heated and operated in a small load operation state, it can be controlled
  • the first throttle member and the second throttle member are opened, and the first port of the second four-way valve is controlled to communicate with the fourth port, so that the refrigerant after passing through the first four-way valve is divided into two branches, one branch After the indoor heat exchanger and the second throttling component are throttled, the second passage of the auxiliary heat exchanger is entered, and the other branch can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, two paths
  • the refrigerant exchanges heat that is, the refrigerant in the second passage is throttled by the second throttle member, thereby evaporating in the auxiliary heat exchanger, and the refrigerant in the first passage is condensed, thereby improving the evaporation pressure of the air conditioner system and
  • the evaporation temperature avoids the problem of
  • the controller is specifically configured to: disposed between the first port of the first channel and the fourth port of the second four-way valve In the case of a pipeline, if the air conditioner system is cooled and operated, and the air conditioner system is in a small load operation state, controlling the first throttle member and the second throttle member to be turned on, and controlling the The second port of the second four-way valve is in communication with the fourth port.
  • the first throttle member when the first throttle member is disposed on the pipeline between the first port of the first passage and the fourth port of the second four-way valve, if the air conditioner system is cooled and is in a small state In the load running state, the first throttle member and the second throttle member are controlled to be opened, and the second port of the second four-way valve is controlled to communicate with the fourth port, so that the refrigerant after passing through the outdoor heat exchanger is divided into two branches.
  • a branch road is throttled by the outdoor heat exchanger and the second throttle component, and then enters the second passage of the auxiliary heat exchanger, and the other branch can directly enter the first passage of the auxiliary heat exchanger, and passes through the second fourth
  • the valve enters the indoor heat exchanger, and the two refrigerants in the auxiliary heat exchanger exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member, thereby evaporating in the auxiliary heat exchanger, the first passage
  • the inside of the refrigerant is condensed, thereby increasing the evaporation pressure and the evaporation temperature of the air conditioner system, thereby avoiding the problem of oil shortage of the compressor caused by the small load cooling operation of the air conditioner system.
  • a method of controlling an air conditioner system for controlling an air conditioner system comprising: acquiring An operation mode of the air conditioner system; determining whether the air conditioner system is in a small load operation state, or detecting an outdoor ambient temperature and an exhaust superheat degree of the compressor; according to an operation mode of the air conditioner system, and detecting The outdoor ambient temperature and the exhaust superheat or the air conditioner system are in a small load operating state, to the first throttle component, the second throttle component, and the second cross The valve is controlled.
  • a method of controlling an air conditioner system according to an embodiment of the present invention according to an operation mode of the air conditioner system, and whether the air conditioner system is in a small load operation state or an outdoor environment temperature and Exhaust superheat to control the first throttle member, the second throttle member and the second four-way valve, so that the air conditioner system can control the first throttle member and the small load operation or the low temperature heating operation
  • the second throttle member is opened, and the corresponding port of the second four-way valve is controlled to communicate, and the auxiliary heat exchanger is connected to the refrigeration system for operation, thereby improving the overall heat exchange amount of the air conditioner system and avoiding the long time of the air conditioner system
  • the problem of oil shortage of the compressor caused by the low load operation state can also enhance the low temperature heating capacity of the air conditioner system.
  • the first throttle component and the second throttle are determined according to an operation mode of the air conditioner system, and the detected outdoor ambient temperature and the exhaust superheat degree
  • the step of controlling the component and the second four-way valve specifically comprising:
  • the first throttle member is disposed on a pipeline between the second port of the first passage and the second position, if the air conditioner system is heated to operate, and the outdoor is detected Controlling the first throttle component and the first portion when the ambient temperature is less than or equal to the first set temperature value, the exhaust superheat of the compressor is less than or equal to the first set superheat and continues for a first predetermined duration
  • the two throttle member is opened, and the second port of the second four-way valve is controlled to communicate with the fourth port.
  • the outdoor ambient temperature is less than or equal to the first setting.
  • the fixed temperature value, the exhaust superheat of the compressor is less than or equal to the first set superheat and lasts for a first predetermined period of time, then controlling the first throttle member and the second throttle member to open, and controlling the second four-way valve
  • the second port is connected to the fourth port such that the refrigerant after passing through the indoor heat exchanger is divided into two branches, and one branch is throttled by the indoor heat exchanger and the second throttle member and then enters the second of the auxiliary heat exchanger.
  • the passage, the other branch can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, and the two refrigerants exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member, so
  • the auxiliary heat exchanger evaporates, and the refrigerant in the first passage condenses, thereby improving the evaporation pressure and the evaporation temperature of the air conditioner system, effectively utilizing the heat of the condensed refrigerant, and improving the overall heat exchange amount of the air conditioner system.
  • the low temperature heating capacity of the air conditioner system is not limited to the air conditioner system.
  • the first throttle component and the second throttle component after controlling the first throttle component and the second throttle component to be turned on, further comprising: detecting that the exhaust superheat degree of the compressor is greater than or equal to a second set superheat degree and continuing The first throttle member and the second throttle member are controlled to be closed when the predetermined ambient time is long, or when the outdoor ambient temperature is greater than or equal to the second set temperature value.
  • the air conditioner system when it is detected that the exhaust superheat degree of the compressor is greater than or equal to the second set superheat degree for a second predetermined duration, or the outdoor ambient temperature is greater than or equal to the second set temperature value,
  • the air conditioner system is not a low temperature heating operation, in which case the first throttle member and the second throttle member can be controlled to be closed to operate the air conditioner system in a normal manner.
  • the first throttle member and the second throttle member are controlled according to an operation mode of the air conditioner system and whether the air conditioner system is in a small load operation state
  • the steps specifically include:
  • the first throttle member is disposed on a pipeline between the second port of the first passage and the second position, if the air conditioner system is heated to operate, and the air conditioner is determined When the system is in a small load operation state, the first throttle member and the second throttle member are controlled to be opened, and the first port of the second four-way valve is controlled to communicate with the fourth port.
  • the air conditioner system when the first throttle member is disposed on the pipeline between the second port and the second position of the first passage, if the air conditioner system is heated and operated in a small load operation state, it can be controlled
  • the first throttle member and the second throttle member are opened, and the first port of the second four-way valve is controlled to communicate with the fourth port, so that the refrigerant after passing through the first four-way valve is divided into two branches, one branch After the indoor heat exchanger and the second throttling component are throttled, the second passage of the auxiliary heat exchanger is entered, and the other branch can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, and the two refrigerants are performed.
  • the heat exchange that is, the refrigerant in the second passage is throttled by the second throttle member, thereby evaporating in the auxiliary heat exchanger, and the refrigerant in the first passage is condensed, thereby improving the evaporation pressure and the evaporation temperature of the air conditioner system.
  • the problem of oil shortage of the compressor caused by the small load heating operation of the air conditioner system is avoided.
  • it can also improve the overall heat exchange capacity of the air conditioner unit, and enhance the low temperature heating capacity of the air conditioner system.
  • the first throttle member and the second throttle member are controlled according to an operation mode of the air conditioner system and whether the air conditioner system is in a small load operation state
  • the steps specifically include:
  • the first throttle member is disposed on a pipeline between the first port of the first passage and the fourth port of the second four-way valve, if the air conditioner system is cooled and operated, and Determining that the air conditioner system is in a small load operation state, controlling the first throttle member and the second throttle member to open, and controlling the second port of the second four-way valve to communicate with the fourth port.
  • the first throttle member when the first throttle member is disposed on the pipeline between the first port of the first passage and the fourth port of the second four-way valve, if the air conditioner system is cooled and is in a small state In the load running state, the first throttle member and the second throttle member are controlled to be opened, and the second port of the second four-way valve is controlled to communicate with the fourth port, so that the refrigerant after passing through the outdoor heat exchanger is divided into two branches.
  • a branch road is throttled by the outdoor heat exchanger and the second throttle component, and then enters the second passage of the auxiliary heat exchanger, and the other branch can directly enter the first passage of the auxiliary heat exchanger, and passes through the second fourth
  • the valve enters the indoor heat exchanger, and the two refrigerants in the auxiliary heat exchanger exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member, thereby evaporating in the auxiliary heat exchanger, the first passage
  • the inside of the refrigerant is condensed, thereby increasing the evaporation pressure and the evaporation temperature of the air conditioner system, thereby avoiding the problem of oil shortage of the compressor caused by the small load cooling operation of the air conditioner system.
  • the first throttle component and the second throttle component after controlling the first throttle component and the second throttle component to be turned on, further comprising: determining whether the air conditioner system exits the small load operation state; When the system exits the small load operating state, the first throttle component and the second throttle component are controlled to be closed.
  • the air conditioner system when it is determined that the air conditioner system exits the small load operation state, by controlling the first throttle member and the second throttle member to be closed, the air conditioner system can operate in a normal operation mode.
  • the step of determining whether the air conditioner system exits the small load operating state specifically includes: determining whether a sum of capability requirements of all operating indoor units in the air conditioner system is greater than Or equal to the first value and last for a third predetermined duration; determining that the air conditioner system exits when the sum of the capability requirements of all the operating indoor units is greater than or equal to the first value and continues for the third predetermined duration The small load operating state.
  • the sum of the capacity requirements of all operating indoor units can be expressed either directly by the actual value of the capacity requirement or by the form of the ratio (ie the actual value of the capacity requirements of all operating indoor units and the air conditioner system can provide The ratio of total capacity demand is expressed.
  • the first value is the actual value; when represented by the form of the ratio, the first value is a constant between 0 and 1.
  • the step of determining whether the air conditioner system is in a small load operation state comprises: determining whether a sum of capability requirements of all operating indoor units in the air conditioner system is less than or equal to a second value And continuing for a fourth predetermined duration; determining that the air conditioner system is in a small load operating state when a sum of capability requirements of all of the operating indoor units is less than or equal to the second value and continues for the fourth predetermined duration.
  • the sum of the capacity requirements of all operating indoor units can be expressed either directly by the actual value of the capacity requirement or by the form of the ratio (ie the actual value of the capacity requirements of all operating indoor units and the air conditioner system can provide The ratio of total capacity demand is expressed.
  • the second value is the actual value; when represented by the form of the ratio, the second value is a constant between 0 and 1.
  • the air conditioner system it is also possible to determine whether the air conditioner system is in a small load operation state according to the number of indoor units in the running state, for example, when the number of indoor units in the running state is small, the air conditioner can be determined.
  • the system is in a small load operation.
  • the first throttle component and the second throttle component after controlling the first throttle component and the second throttle component to be turned on, further comprising: detecting a second port and a first port of the second channel of the auxiliary heat exchanger a temperature value; adjusting an opening degree of the second throttle member according to a temperature value of the second port of the second passage of the auxiliary heat exchanger and the first port.
  • the second passage of the auxiliary heat exchanger is mainly for the evaporation of the refrigerant
  • the temperature values of the second port and the first port of the second passage of the auxiliary heat exchanger reflect the evaporation of the auxiliary heat exchanger.
  • the degree of superheat of the side therefore, by adjusting the opening degree of the second throttle member according to the temperature value of the second port and the first port of the second passage of the auxiliary heat exchanger, it is ensured that the amount of refrigerant flowing through the second passage is reasonable In the range.
  • the step of adjusting the opening degree of the second throttle member according to the temperature value of the second port and the first port of the second passage of the auxiliary heat exchanger comprises: a temperature difference between the second port of the second channel and the first port;
  • Adjusting the opening degree of the second throttle member to a first opening degree during a process in which the temperature difference rises to a first temperature value, and in a process in which the temperature difference is decreased by a second temperature value In the process of increasing the temperature difference from the first temperature value to the third temperature value, and in the The temperature difference is decreased from the fourth temperature value to the second temperature value, the opening degree of the second throttle member is controlled to remain unchanged; and the temperature difference is continuously increased by the third temperature value And increasing the opening degree of the second throttle member by a second opening degree during the process of decreasing the temperature difference to the fourth temperature value.
  • the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three sections during the ascending process, that is, below the first temperature value, and the first temperature value is ⁇
  • the third temperature value continues to rise from the third temperature value; the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three intervals during the descending process, and is decreased to the fourth temperature.
  • the greater the temperature difference between the second port and the first port of the second passage of the auxiliary heat exchanger the more the refrigerant demand in the second passage is required, so that the opening of the second throttle member can be appropriately adjusted.
  • the temperature difference between the second port and the first port of the second channel of the auxiliary heat exchanger is smaller, the less the demand of the refrigerant in the second channel is, so the second can be appropriately adjusted.
  • the opening of the throttle component is smaller, the less the demand of the refrig
  • the opening of the first throttle member and the second throttle member further comprising: detecting a temperature of a heat exchanger currently used as a condenser in the air conditioner system, And detecting a tube temperature of the first passage of the auxiliary heat exchanger; calculating an average of a temperature of the heat exchanger currently used as the condenser in the air conditioner system and a tube temperature of the first passage of the auxiliary heat exchanger a value; adjusting an opening degree of the first throttle member according to a tube temperature of the first passage of the auxiliary heat exchanger and the average value.
  • the indoor heat exchanger of the indoor unit in the operating state is used as a condenser; if the air conditioner system is operated in the cooling mode, the outdoor heat exchange in the outdoor unit The device is used as a condenser.
  • the tube temperature of the first passage of the auxiliary heat exchanger adjusts the opening degree of the first throttle member, so that the tube temperature of the first passage of the auxiliary heat exchanger can be indirectly controlled by adjusting the opening degree of the first throttle member Further, it is ensured that the tube temperature of the first passage of the auxiliary heat exchanger is adapted to the average value of all the condenser temperatures in the air conditioner system, and the tube temperature of the first passage of the auxiliary heat exchanger is prevented from being too low or too high.
  • the tube temperature of the first passage of the auxiliary heat exchanger is The step of adjusting the opening degree of the first throttle member specifically includes: when a tube temperature of the first passage of the auxiliary heat exchanger is less than a difference between the average value and a first predetermined value, Increasing an opening degree of the first throttle member; a tube temperature of the first passage of the auxiliary heat exchanger is greater than or equal to a difference between the average value and the first predetermined value, and less than or equal to Controlling the opening degree of the first throttle member to remain unchanged when the average value is equal to the second predetermined value; the tube temperature of the first passage of the auxiliary heat exchanger is greater than the average value and the second When the sum of the predetermined values is reached, the opening degree of the first throttle member is reduced.
  • the tube temperature of the first passage of the auxiliary heat exchanger when the tube temperature of the first passage of the auxiliary heat exchanger is less than the difference between the average value and the first predetermined value, it indicates that the tube temperature of the first passage of the auxiliary heat exchanger is lower, that is, the amount of refrigerant is lower.
  • the opening degree of the first throttle member can be increased; conversely, when the tube temperature of the first passage of the auxiliary heat exchanger is greater than the sum of the above average value and the second predetermined value, the number of the auxiliary heat exchanger is indicated
  • the temperature of the pipe of one channel is higher, that is, the amount of refrigerant is larger, so the opening degree of the first throttle component can be adjusted smaller; and the pipe temperature of the first channel of the auxiliary heat exchanger is greater than or equal to the above average value and the first predetermined
  • the difference between the values and less than or equal to the sum of the above average value and the second predetermined value indicates that the tube temperature of the first passage of the auxiliary heat exchanger is within a normal range, so that the opening degree of the first throttle member can be controlled to remain unchanged. change.
  • a control device for an air conditioner system for controlling an air conditioner system comprising: acquiring a unit, configured to acquire an operation mode of the air conditioner system; a determining unit, determining whether the air conditioner system is in a small load operation state, or a first detecting unit, configured to detect an outdoor ambient temperature and an exhaust of the compressor Superheat; a control unit, configured to: according to an operation mode of the air conditioner system, and the outdoor ambient temperature and the exhaust superheat detected by the first detecting unit or whether the air conditioner system is in a small load In an operating state, the first throttle member, the second throttle member, and the second four-way valve are controlled.
  • the first throttle member is configured according to an operation mode of the air conditioner system, and whether the air conditioner system is in a small load operation state or an outdoor environment temperature and exhaust superheat degree
  • the second throttle component and the second four-way valve are controlled to enable the air conditioner system to control the opening of the first throttle component and the second throttle component during the low load operation or the low temperature heating operation, and control the second fourth
  • the corresponding ports of the valve are connected, and the auxiliary heat exchanger is connected to the refrigeration system for operation, thereby improving the overall heat exchange amount of the air conditioner system and avoiding the empty
  • the regulator system is in a small load operation state for a long time, which causes the compressor to suffer from oil shortage, and can also enhance the low-temperature heating capability of the air conditioner system.
  • control unit is specifically configured to: when the first throttle member is disposed on a pipeline between the second port of the first passage and the second position, If the air conditioner system is heating, and the first detecting unit detects that the outdoor ambient temperature is less than or equal to a first set temperature value, and the exhaust superheat of the compressor is less than or equal to the first setting The superheat is maintained for a first predetermined period of time, the first throttle member and the second throttle member are controlled to be opened, and the second port of the second four-way valve is controlled to communicate with the fourth port.
  • the outdoor ambient temperature is less than or equal to the first setting.
  • the fixed temperature value, the exhaust superheat of the compressor is less than or equal to the first set superheat and lasts for a first predetermined period of time, then controlling the first throttle member and the second throttle member to open, and controlling the second four-way valve
  • the second port is connected to the fourth port such that the refrigerant after passing through the indoor heat exchanger is divided into two branches, and one branch is throttled by the indoor heat exchanger and the second throttle member and then enters the second of the auxiliary heat exchanger.
  • the passage, the other branch can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, and the two refrigerants exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member, so
  • the auxiliary heat exchanger evaporates, and the refrigerant in the first passage condenses, thereby improving the evaporation pressure and the evaporation temperature of the air conditioner system, effectively utilizing the heat of the condensed refrigerant, and improving the overall heat exchange amount of the air conditioner system.
  • the low temperature heating capacity of the air conditioner system is not limited to the air conditioner system.
  • control unit is further configured to: after the first throttle unit and the second throttle unit are controlled to be turned on, if the first detecting unit detects that the exhaust superheat of the compressor is greater than Or equal to the second set superheat and last for a second predetermined duration, or detecting that the outdoor ambient temperature is greater than or equal to the second set temperature value, controlling the first throttle component and the second throttle component shut down.
  • the air conditioner system when it is detected that the exhaust superheat degree of the compressor is greater than or equal to the second set superheat degree for a second predetermined duration, or the outdoor ambient temperature is greater than or equal to the second set temperature value,
  • the air conditioner system is not a low temperature heating operation, in which case the first throttle member and the second throttle member can be controlled to be closed to operate the air conditioner system in a normal manner.
  • control unit is specifically configured to: in the first throttle Where the component is disposed on the pipeline between the second port of the first passage and the second position, if the air conditioner system is heated, and the determining unit determines that the air conditioner system is small In the load operating state, the first throttle member and the second throttle member are controlled to be opened, and the first port of the second four-way valve is controlled to communicate with the fourth port.
  • the air conditioner system when the first throttle member is disposed on the pipeline between the second port and the second position of the first passage, if the air conditioner system is heated and operated in a small load operation state, it can be controlled
  • the first throttle member and the second throttle member are opened, and the first port of the second four-way valve is controlled to communicate with the fourth port, so that the refrigerant after passing through the first four-way valve is divided into two branches, one branch After the indoor heat exchanger and the second throttling component are throttled, the second passage of the auxiliary heat exchanger is entered, and the other branch can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, and the two refrigerants are performed.
  • the heat exchange that is, the refrigerant in the second passage is throttled by the second throttle member, thereby evaporating in the auxiliary heat exchanger, and the refrigerant in the first passage is condensed, thereby improving the evaporation pressure and the evaporation temperature of the air conditioner system.
  • the problem of oil shortage of the compressor caused by the small load heating operation of the air conditioner system is avoided.
  • it can also improve the overall heat exchange capacity of the air conditioner unit, and enhance the low temperature heating capacity of the air conditioner system.
  • control unit is specifically configured to: disposed between the first port of the first channel and the fourth port of the second four-way valve In the case of the pipeline, if the air conditioner system is cooled and operated, and the determining unit determines that the air conditioner system is in a small load operation state, controlling the first throttle member and the second throttle member to be turned on. And controlling the second port of the second four-way valve to communicate with the fourth port.
  • the first throttle member when the first throttle member is disposed on the pipeline between the first port of the first passage and the fourth port of the second four-way valve, if the air conditioner system is cooled and is in a small state In the load running state, the first throttle member and the second throttle member are controlled to be opened, and the second port of the second four-way valve is controlled to communicate with the fourth port, so that the refrigerant after passing through the outdoor heat exchanger is divided into two branches.
  • a branch road is throttled by the outdoor heat exchanger and the second throttle component, and then enters the second passage of the auxiliary heat exchanger, and the other branch can directly enter the first passage of the auxiliary heat exchanger, and passes through the second fourth
  • the two refrigerants in the auxiliary heat exchanger exchange heat that is, the refrigerant in the second passage is throttled by the second throttle member, thereby evaporating in the auxiliary heat exchanger, in the first passage
  • the refrigerant is condensed, thereby increasing the evaporation pressure and evaporation temperature of the air conditioner system, avoiding The problem that the compressor lacks oil damage during the small load cooling operation of the air conditioner system is eliminated.
  • the determining unit is further configured to: after the control unit controls the first throttle component and the second throttle component to be turned on, determine whether the air conditioner system exits the a small load operating state; the control unit is further configured to control the first throttle component and the second throttle component to be closed when the air conditioner system exits the small load operating state.
  • the air conditioner system when it is determined that the air conditioner system exits the small load operation state, by controlling the first throttle member and the second throttle member to be closed, the air conditioner system can operate in a normal operation mode.
  • the determining unit is specifically configured to: determine whether a sum of capability requirements of all operating indoor units in the air conditioner system is greater than or equal to a first value and last for a third predetermined duration; When the sum of the capability requirements of all the operating indoor units is greater than or equal to the first value and continues for the third predetermined time period, it is determined that the air conditioner system exits the small load operating state.
  • whether the air conditioner system exits the small load operation state may be determined according to the number of indoor units in the running state. For example, when the number of indoor units in the running state is large, the air conditioner system may be determined. Exited the small load operation state.
  • the determining unit is further configured to: determine whether a sum of capability requirements of all operating indoor units in the air conditioner system is less than or equal to a second value and last for a fourth predetermined duration; When the sum of the capability requirements of all the operating indoor units is less than or equal to the second value and continues for the fourth predetermined time period, it is determined that the air conditioner system is in a small load operation state.
  • the air conditioner system it is also possible to determine whether the air conditioner system is in a small load operation state according to the number of indoor units in the running state, for example, when the number of indoor units in the running state is small, the air conditioner can be determined.
  • the system is in a small load operation.
  • the control device of the air conditioner system further includes: a second detecting unit, after the control unit controls the first throttle member and the second throttle member to be turned on, Detecting a temperature value of a second port and a first port of the second passage of the auxiliary heat exchanger; a first adjustment unit for a second port according to the second passage of the auxiliary heat exchanger The temperature value of the first port adjusts the opening of the second throttle member.
  • the second passage of the auxiliary heat exchanger is mainly for the evaporation of the refrigerant
  • the temperature values of the second port and the first port of the second passage of the auxiliary heat exchanger reflect the evaporation of the auxiliary heat exchanger.
  • the degree of superheat of the side therefore, by adjusting the opening degree of the second throttle member according to the temperature value of the second port and the first port of the second passage of the auxiliary heat exchanger, it is ensured that the amount of refrigerant flowing through the second passage is reasonable In the range.
  • the first adjusting unit includes: a first calculating unit, calculating a temperature difference between the second port of the second channel and the first port;
  • An execution unit configured to adjust an opening degree of the second throttle component during a process in which the temperature difference rises to a first temperature value, and in a process in which the temperature difference is decreased by a second temperature value a small first opening; wherein the temperature difference is increased from the first temperature value to the third temperature value, and wherein the temperature difference is decreased from the fourth temperature value to the second temperature value Controlling the opening degree of the second throttle member to remain unchanged; during the process in which the temperature difference continues to rise from the third temperature value, and the temperature difference decreases to the fourth During the temperature value, the opening degree of the second throttle member is increased by a second opening degree.
  • the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three sections during the ascending process, that is, below the first temperature value, and the first temperature value is ⁇
  • the third temperature value continues to rise from the third temperature value; the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three intervals during the descending process, and is decreased to the fourth temperature.
  • the greater the temperature difference between the second port and the first port of the second passage of the auxiliary heat exchanger the more the refrigerant demand in the second passage is required, so that the opening of the second throttle member can be appropriately adjusted.
  • the temperature difference between the second port and the first port of the second channel of the auxiliary heat exchanger is smaller, the less the demand of the refrigerant in the second channel is, so the second can be appropriately adjusted.
  • the opening of the throttle component is smaller, the less the demand of the refrig
  • the control device of the air conditioner system further includes: a third detecting unit, after the control unit controls the first throttle member and the second throttle member to be turned on, Detecting a temperature of a heat exchanger currently used as a condenser in the air conditioner system, and detecting a tube temperature of the first passage of the auxiliary heat exchanger; and a second calculating unit for calculating a current current in the air conditioner system Temperature of the heat exchanger used as the condenser and the auxiliary heat exchanger The average value of the tube temperature of the first passage; the second adjusting unit is configured to adjust the opening degree of the first throttle member according to the tube temperature of the first passage of the auxiliary heat exchanger and the average value.
  • the indoor heat exchanger of the indoor unit in the operating state is used as a condenser; if the air conditioner system is operated in the cooling mode, the outdoor heat exchange in the outdoor unit The device is used as a condenser.
  • the tube temperature of the first passage of the auxiliary heat exchanger adjusts the opening degree of the first throttle member, so that the tube temperature of the first passage of the auxiliary heat exchanger can be indirectly controlled by adjusting the opening degree of the first throttle member Further, it is ensured that the tube temperature of the first passage of the auxiliary heat exchanger is adapted to the average value of all the condenser temperatures in the air conditioner system, and the tube temperature of the first passage of the auxiliary heat exchanger is prevented from being too low or too high.
  • the second adjusting unit is configured to: when the tube temperature of the first channel of the auxiliary heat exchanger is less than a difference between the average value and a first predetermined value, An opening degree of the first throttle member; a tube temperature of the first passage of the auxiliary heat exchanger is greater than or equal to a difference between the average value and the first predetermined value, and less than or equal to the average value and the Controlling the opening degree of the first throttle member to remain unchanged; the tube temperature of the first passage of the auxiliary heat exchanger is greater than a sum of the average value and the second predetermined value At the time, the opening degree of the first throttle member is reduced.
  • the tube temperature of the first passage of the auxiliary heat exchanger when the tube temperature of the first passage of the auxiliary heat exchanger is less than the difference between the average value and the first predetermined value, it indicates that the tube temperature of the first passage of the auxiliary heat exchanger is lower, that is, the amount of refrigerant is lower.
  • the opening degree of the first throttle member can be increased; conversely, when the tube temperature of the first passage of the auxiliary heat exchanger is greater than the sum of the above average value and the second predetermined value, the number of the auxiliary heat exchanger is indicated
  • the temperature of the pipe of one channel is higher, that is, the amount of refrigerant is larger, so the opening degree of the first throttle component can be adjusted smaller; and the pipe temperature of the first channel of the auxiliary heat exchanger is greater than or equal to the above average value and the first predetermined
  • the difference between the values and less than or equal to the sum of the above average value and the second predetermined value indicates that the tube temperature of the first passage of the auxiliary heat exchanger is within a normal range, so that the opening degree of the first throttle member can be controlled to remain unchanged. change.
  • FIG. 1 is a schematic structural view of an air conditioner system according to a first embodiment of the present invention
  • Figure 2 is a block diagram showing the structure of an air conditioner system according to a second embodiment of the present invention.
  • Figure 3 is a block diagram showing the structure of an air conditioner system according to a third embodiment of the present invention.
  • FIG. 4 is a flow chart showing a control method of an air conditioner system according to a first embodiment of the present invention
  • FIG. 5 is a flow chart showing a control method of an air conditioner system according to a second embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing a control manner of a throttle member in an air conditioner system according to an embodiment of the present invention
  • Figure 7 is a flow chart showing a control method of an air conditioner system according to a third embodiment of the present invention.
  • Figure 8 is a block diagram showing the structure of an air conditioner system according to a fourth embodiment of the present invention.
  • Figure 9 is a flow chart showing a control method of an air conditioner system according to a fourth embodiment of the present invention.
  • Figure 10 is a schematic block diagram showing a control device of an air conditioner system according to a first embodiment of the present invention.
  • Figure 11 is a schematic block diagram showing a control device of an air conditioner system according to a second embodiment of the present invention.
  • Fig. 1 shows a schematic structural view of an air conditioner system according to a first embodiment of the present invention.
  • an air conditioner system includes: a refrigeration system including at least a compressor 1, a first four-way valve 21, an outdoor heat exchanger 3, and an indoor heat exchanger 4; The second four-way valve 22, the auxiliary heat exchanger 5, the first throttle member 6, and the second throttle member 7.
  • the first port of the second four-way valve 22 is connected to the pipeline between the first four-way valve 21 and the indoor heat exchanger 4 (the position of B1 in FIG. 1), and the second port of the second four-way valve 22 a first position (the position of A1 in FIG. 1) connected to the line between the indoor heat exchanger 4 and the outdoor heat exchanger 3;
  • the auxiliary heat exchanger 5 has a first passage and a second passage, the first passage of which One port is in communication with the fourth port of the second four-way valve 22, and the second port of the first passage of the auxiliary heat exchanger 5 is connected to the second position on the line between the indoor heat exchanger 4 and the outdoor heat exchanger 3. (the position of A2 in Fig.
  • the first port of the second passage of the auxiliary heat exchanger 5 is connected to the third position on the line between the indoor heat exchanger 4 and the outdoor heat exchanger 3 (the position of A3 in Fig. 1)
  • the second port of the second passage of the auxiliary heat exchanger 5 is connected at any position on the line between the outdoor heat exchanger 3 and the return port of the compressor 1;
  • the first throttle member 6 is disposed in the auxiliary heat exchanger 5 a conduit between the second port of the first passage and the second position;
  • a second throttle member 7 disposed at the first port of the second passage of the auxiliary heat exchanger 5 and said Line between the three positions.
  • the third port of the second four-way valve 22 is in a blocked state.
  • the refrigeration system further includes a third throttle member 8 and a gas-liquid separator 9; wherein the four ports of the first four-way valve 21 are respectively connected to the exhaust port of the compressor 1 and the outdoor heat exchanger 3
  • the first port of the one-port, indoor heat exchanger 4 is in communication with the inlet of the gas-liquid separator 9, and the second port of the outdoor heat exchanger 3 is connected to the second port of the indoor heat exchanger 4 through the third throttle member 8.
  • the outlet of the gas-liquid separator 9 is in communication with the return port of the compressor 1.
  • connection position of the second port of the second channel of the auxiliary heat exchanger 5 may be as follows:
  • the second port of the second passage of the auxiliary heat exchanger 5 is connected to a pipe communicating with the first four-way valve 21 at the inlet of the gas-liquid separator 9.
  • the second port of the second passage of the auxiliary heat exchanger 5 is connected to a pipe in which the first port of the outdoor heat exchanger 3 is in communication with the first four-way valve 21.
  • the second port of the second passage of the auxiliary heat exchanger 5 is connected to a pipe communicating with the outlet of the compressor 1 at the outlet of the gas-liquid separator 9.
  • the second port of the second passage of the auxiliary heat exchanger 5 is connected to the first port of the third four-way valve 23, and the second port of the third four-way valve 23 is connected to the outdoor heat exchanger.
  • the first port of the device 3 is connected to the first four-way valve 21, and the fourth port of the third four-way valve 23 is connected to a pipe communicating with the first four-way valve 21 at the inlet of the gas-liquid separator 9.
  • the valve 21 is then passed to the gas-liquid separator 9.
  • the third port of the third four-way valve 23 is in a blocked state.
  • the air conditioner system further includes: a controller (neither shown in FIGS. 1 to 3) connected to the first throttle member 6, the second throttle member 7, and the second four-way valve 22, It is used to control the first throttle member 6, the second throttle member 7, and the second four-way valve 22.
  • a controller (neither shown in FIGS. 1 to 3) connected to the first throttle member 6, the second throttle member 7, and the second four-way valve 22, It is used to control the first throttle member 6, the second throttle member 7, and the second four-way valve 22.
  • the controller is specifically configured to: when the outdoor environment temperature is less than or equal to the first set temperature value, and the exhaust superheat of the compressor 1 is less than or Equal to the first set superheat and for the first predetermined duration, the first throttle member 6 and the second throttle member 7 are controlled to be opened, and the second port of the second four-way valve 22 is controlled to communicate with the fourth port.
  • the evaporation pressure and evaporation temperature of the system effectively utilize the heat of the condensed refrigerant, improve the overall heat exchange capacity of the air conditioner system, and enhance the low-temperature heating capacity of the air conditioner system.
  • the controller is specifically configured to: when the air conditioner system is in a small load operation state during the heating operation of the air conditioner system, control the first throttle member 6 and the second throttle member 7 The first port of the second four-way valve 22 is opened and communicated with the fourth port.
  • the first throttle member 6 and the second throttle member 7 are controlled to be opened when the air conditioner system is heated and operated in a small load operation state, and the first port and the fourth port of the second four-way valve 22 are controlled to communicate with each other.
  • the refrigerant after passing through the first four-way valve 21 is divided into two branches, one branch is throttled by the indoor heat exchanger 4 and the second throttle member 7 and then enters the second passage of the auxiliary heat exchanger 5, and the other
  • the branch can directly enter the first passage of the auxiliary heat exchanger 5 through the second four-way valve 22, and the two refrigerants exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member 7, thereby assisting
  • the heat exchanger 5 evaporates and the refrigerant in the first passage condenses, thereby increasing the evaporation pressure and the evaporation temperature of the air conditioner system, thereby avoiding the problem of the oil shortage of the compressor 1 caused by the small load heating operation of the air conditioner system. At the same time,
  • control method of the first embodiment of the present invention is as shown in FIG. 4, and specifically includes:
  • Step S40 obtaining an operation mode of the air conditioner system.
  • step S42 it is judged whether the air conditioner system is in a small load operation state, or the outdoor ambient temperature and the exhaust superheat degree of the compressor are detected.
  • the step of determining whether the air conditioner system is in a small load operation state in step S42 comprises: determining whether a sum of capability requirements of all operating indoor units in the air conditioner system is less than or equal to Binary and lasting for a fourth predetermined duration; determining that the air conditioner system is in a small load operation when the sum of the capability requirements of all of the operating indoor units is less than or equal to the second value and continuing for the fourth predetermined duration status.
  • the air conditioner system it is also possible to determine whether the air conditioner system is in a small load operation state according to the number of indoor units in the running state, for example, when the number of indoor units in the running state is small, the air conditioner can be determined.
  • the system is in a small load operation.
  • the exhaust superheat of the compressor the exhaust temperature of the compressor - the saturation temperature of the compressor, and the saturation temperature of the compressor can be determined by the exhaust pressure.
  • Step S44 according to the operating mode of the air conditioner system, and the detected outdoor ambient temperature and the exhaust superheat or whether the air conditioner system is in a small load operating state, the first throttle component and the second throttle component And the second four-way valve for control.
  • step S44 includes the following two embodiments:
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • step S44 according to an operation mode of the air conditioner system, and the detected outdoor ambient temperature and the exhaust superheat degree, the first throttle component and the second
  • the step of controlling the throttle unit and the second four-way valve includes:
  • the air conditioner system is heating and running, and detecting that the outdoor ambient temperature is less than or equal to a first set temperature value, the exhaust superheat of the compressor is less than or equal to a first set superheat and continues for the first time
  • the first throttle member and the second throttle member are controlled to open, and the second port of the second four-way valve is controlled to communicate with the fourth port.
  • the outdoor ambient temperature is less than or equal to the first set temperature value
  • the exhaust superheat of the compressor is less than or equal to the first set superheat for the first predetermined duration.
  • the refrigerant exchanges heat that is, the refrigerant in the second passage is throttled by the second throttle member, thereby evaporating in the auxiliary heat exchanger, and the refrigerant in the first passage is condensed, thereby improving the evaporation pressure of the air conditioner system and The evaporation temperature effectively
  • the first throttle component and the second throttle component after controlling the first throttle component and the second throttle component to be turned on, further comprising: detecting that the exhaust superheat degree of the compressor is greater than or equal to a second set superheat degree and continuing The first throttle member and the second throttle member are controlled to be closed when the predetermined ambient time is long, or when the outdoor ambient temperature is greater than or equal to the second set temperature value.
  • the air conditioner system when it is detected that the exhaust superheat degree of the compressor is greater than or equal to the second set superheat degree for a second predetermined duration, or the outdoor ambient temperature is greater than or equal to the second set temperature value,
  • the air conditioner system is not a low temperature heating operation, in which case the first throttle member and the second throttle member can be controlled to be closed to operate the air conditioner system in a normal manner.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • step S44 according to an operation mode of the air conditioner system, and whether the air conditioner system is in a small load operation state, the first throttle member and the second throttle member are The step of performing control includes: controlling the first throttling portion when the air conditioner system is in heating operation, and determining that the air conditioner system is in a small load operation state And the second throttle member is opened, and the first port of the second four-way valve is controlled to communicate with the fourth port.
  • the first throttle member and the second throttle member are controlled to be opened when the air conditioner system is heating and operating in a small load operation state, and the first port and the fourth port of the second four-way valve are controlled.
  • the ports are connected such that the refrigerant after passing through the first four-way valve is divided into two branches, one branch is throttled by the indoor heat exchanger and the second throttle member, and then enters the second passage of the auxiliary heat exchanger, and the other branch
  • the road can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, and the two refrigerants exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member, and therefore in the auxiliary heat exchanger Evaporation, the refrigerant in the first passage is condensed, thereby improving the evaporation pressure and the evaporation temperature of the air conditioner system, and avoiding the problem of oil shortage of the compressor caused by the small load heating operation of the air conditioner system.
  • it can also improve the overall heat exchange
  • the first throttle component and the second throttle component after controlling the first throttle component and the second throttle component to be turned on, further comprising: determining whether the air conditioner system exits the small load operation state; in the air conditioner When the system exits the small load operating state, the first throttle component and the second throttle component are controlled to be closed.
  • the air conditioner system when it is determined that the air conditioner system exits the small load operation state, by controlling the first throttle member and the second throttle member to be closed, the air conditioner system can operate in a normal operation mode.
  • the step of determining whether the air conditioner system exits the small load operating state specifically includes: determining whether a sum of capability requirements of all operating indoor units in the air conditioner system is greater than Or equal to the first value and last for a third predetermined duration; determining that the air conditioner system exits when the sum of the capability requirements of all the operating indoor units is greater than or equal to the first value and continues for the third predetermined duration The small load operating state.
  • whether the air conditioner system exits the small load operation state may be determined according to the number of indoor units in the running state. For example, when the number of indoor units in the running state is large, the air conditioner system may be determined. Exited the small load operation state.
  • the first throttle component and the second throttle component after controlling the first throttle component and the second throttle component to be turned on, further comprising: detecting a temperature value of the second port and the first port of the second channel of the auxiliary heat exchanger; a temperature value of the second port and the first port of the second passage of the auxiliary heat exchanger The opening of the second throttle member.
  • the second passage of the auxiliary heat exchanger is mainly for the evaporation of the refrigerant
  • the temperature values of the second port and the first port of the second passage of the auxiliary heat exchanger reflect the evaporation of the auxiliary heat exchanger.
  • the degree of superheat of the side therefore, by adjusting the opening degree of the second throttle member according to the temperature value of the second port and the first port of the second passage of the auxiliary heat exchanger, it is ensured that the amount of refrigerant flowing through the second passage is reasonable In the range.
  • the step of adjusting the opening degree of the second throttle component according to the temperature value of the second port and the first port of the second channel of the auxiliary heat exchanger comprises: calculating the second channel a temperature difference between the second port and the first port;
  • the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three sections during the ascending process, that is, below the first temperature value, and the first temperature value is ⁇
  • the third temperature value continues to rise from the third temperature value; the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three intervals during the descending process, and is decreased to the fourth temperature.
  • the greater the temperature difference between the second port and the first port of the second passage of the auxiliary heat exchanger the more the refrigerant demand in the second passage is required, so that the opening of the second throttle member can be appropriately adjusted.
  • the temperature difference between the second port and the first port of the second channel of the auxiliary heat exchanger is smaller, the less the demand of the refrigerant in the second channel is, so the second can be appropriately adjusted.
  • the opening of the throttle component is smaller, the less the demand of the refrig
  • the first throttling component and the second throttling component after controlling the first throttling component and the second throttling component to be turned on, further comprising: detecting an indoor heat exchanger temperature of the indoor unit in an operating state in the air conditioner system, and detecting the Calculating a tube temperature of the first passage of the auxiliary heat exchanger; calculating an average value of the indoor heat exchanger temperature of the indoor unit in the operating state in the air conditioner system and the tube temperature of the first passage of the auxiliary heat exchanger; Adjusting the tube temperature of the first passage of the auxiliary heat exchanger and the average value The opening of the first throttle member.
  • the tube is moderately calculated to adjust the opening degree of the first throttle member, so that the tube temperature of the first passage of the auxiliary heat exchanger can be indirectly controlled by adjusting the opening degree of the first throttle member, thereby ensuring
  • the tube temperature of the first passage of the auxiliary heat exchanger is adapted to the average of all condenser temperatures in the air conditioner system (the first passage of the auxiliary heat exchanger and the indoor unit in the operating state during the heating operation of the air conditioner system)
  • the indoor heat exchanger is used as a condenser) to avoid the tube temperature of the first passage of the auxiliary heat exchanger being too low or too high.
  • the step of adjusting the opening degree of the first throttle member according to the tube temperature of the first passage of the auxiliary heat exchanger and the average value specifically comprising: a first passage in the auxiliary heat exchanger When the tube temperature is less than the difference between the average value and the first predetermined value, the opening degree of the first throttle member is increased; the tube temperature of the first passage of the auxiliary heat exchanger is greater than or equal to the average Controlling the opening of the first throttle member to remain unchanged when the value is different from the first predetermined value and less than or equal to the sum of the average value and the second predetermined value; in the auxiliary heat exchanger When the tube temperature of the first channel is greater than the sum of the average value and the second predetermined value, the opening degree of the first throttle member is reduced.
  • the tube temperature of the first passage of the auxiliary heat exchanger when the tube temperature of the first passage of the auxiliary heat exchanger is less than the difference between the average value and the first predetermined value, it indicates that the tube temperature of the first passage of the auxiliary heat exchanger is lower, that is, the amount of refrigerant is lower.
  • the opening degree of the first throttle member can be increased; conversely, when the tube temperature of the first passage of the auxiliary heat exchanger is greater than the sum of the above average value and the second predetermined value, the number of the auxiliary heat exchanger is indicated
  • the temperature of the pipe of one channel is higher, that is, the amount of refrigerant is larger, so the opening degree of the first throttle component can be adjusted smaller; and the pipe temperature of the first channel of the auxiliary heat exchanger is greater than or equal to the above average value and the first predetermined
  • the difference between the values and less than or equal to the sum of the above average value and the second predetermined value indicates that the tube temperature of the first passage of the auxiliary heat exchanger is within a normal range, so that the opening degree of the first throttle member can be controlled to remain unchanged. change.
  • control method of the second embodiment of the present invention is as shown in FIG. 5, and specifically includes:
  • step 502 the air conditioner system operates in a heating mode.
  • Step 504 determining whether the outdoor ambient temperature Th is less than or equal to k, and the exhaust superheat degree Tp of the compressor is less than or equal to m for t1 time, and if yes, executing step 506; otherwise, executing Line 512.
  • t1 may be 10 minutes.
  • Step 506 the second port of the second four-way valve is controlled to communicate with the fourth port, the first throttle member and the second throttle member are opened, and the first section is respectively adjusted according to the manners 1 and 2 shown in FIG.
  • the opening of the flow component and the second throttle component may be electronic expansion valves.
  • the adjustment of the pair of first throttle devices is specifically: detecting the tube temperature T of the first passage (as the condensation side) of the auxiliary heat exchanger, and detecting that the air conditioner system is currently being
  • the central temperature of the indoor heat exchanger coil (used as a condenser) in the operating indoor unit is calculated based on the detected temperature, and the temperature average value T1 is calculated based on the temperature average value T1 for the first throttle device.
  • the opening adjustment is as follows:
  • the first throttling device is controlled to turn off step f2.
  • f1 and f2 may be the same or different.
  • the adjustment of the second throttle device according to the manner shown in FIG. 6 is specifically as follows:
  • the adjustment process of the first mode and the second mode may be performed periodically, for example, every 2 minutes.
  • the clock is adjusted once.
  • step 508 it is determined whether the outdoor ambient temperature Th is greater than or equal to n, or the exhaust superheat degree Tp of the compressor is greater than or equal to q for t2 time. If yes, step 510 is performed; otherwise, step 506 is performed. Wherein, in one embodiment of the invention, t2 may be 10 minutes.
  • Step 510 controlling the first throttle component and the second throttle component to be closed.
  • step 512 the air conditioner system operates in accordance with normal logic.
  • the control method shown in FIG. 5 is further described below with reference to FIG. 1.
  • the air conditioner system is heating, the first four-way valve 21 is powered on, and the compressor 1 is exhausted through the first four-way valve 21 to enter the room for replacement.
  • the heat exchanger 4 which becomes a high-pressure medium-temperature refrigerant after condensing and releasing heat, is throttled by the third throttle member 8 and then enters the outdoor heat exchanger 3.
  • the second port of the second four-way valve is controlled to communicate with the fourth port (for example, the second four-way valve is controlled to be in a power-off state), and the refrigerant after passing through the indoor heat exchanger 4 is divided into two branches:
  • the refrigerant in the high pressure medium temperature state flows into the auxiliary heat exchanger 5 through the second four-way valve 22, and releases heat in the auxiliary heat exchanger 5; the refrigerant of the other branch enters the auxiliary exchange after being throttled by the second throttle member 7.
  • the heat exchanger 5 absorbs heat in the auxiliary heat exchanger 5 to obtain a higher evaporation temperature, and mixes with the refrigerant from the outdoor heat exchanger 3 as an evaporator into the return side of the compressor 1, thereby improving the evaporation of the entire system.
  • the pressure and evaporation temperature effectively utilize the heat of the condensed refrigerant to increase the overall heat exchange capacity of the unit and enhance the ability of low temperature heating.
  • step 702 the air conditioner system operates in a heating mode.
  • step 704 the capability requirement n of the indoor unit is obtained.
  • step 706 it is determined whether the capability requirement n of the indoor unit is less than or equal to a% and lasts for b minutes. If yes, it is determined that the air conditioner system is in a small load operation state, and then step 708 is performed; otherwise, step 714 is performed.
  • Step 708 when determining that the air conditioner system is in a small load operation state, controlling the first port of the second four-way valve to communicate with the fourth port, and controlling the first throttle member and the second throttle member to open, according to FIG.
  • the first mode and the second mode shown in the figure adjust the opening degrees of the first throttle member and the second throttle member, respectively.
  • the first throttle member and the second throttle member may be electronic expansion valves.
  • the adjustment process of the first mode and the second mode may be performed periodically, for example, every 2 minutes.
  • step 710 it is determined whether the capability demand n of the indoor unit is greater than or equal to c% and lasts for d minutes. If yes, it is determined that the air conditioner system exits the small load operation state, and then step 712 is performed; otherwise, step 708 is continued.
  • Step 712 controlling the first throttle component and the second throttle component to be closed.
  • the air conditioner system operates in accordance with normal logic.
  • the control method shown in FIG. 7 is further described below with reference to FIG. 1.
  • the air conditioner system is determined to be a small load heating operation, and the auxiliary operation is started at this time.
  • the first port is in communication with the fourth port.
  • the first throttle component 6 and the second throttle component 7 are adjusted accordingly according to a certain logic.
  • the high-temperature and high-pressure gaseous refrigerant from the first four-way valve 21 is divided into two paths, one directly enters the indoor heat exchanger 4 to condense and radiate heat, and the other passes through the second four-way valve 22 to enter the auxiliary exchange.
  • the heat exchanger 5 exchanges heat with a refrigerant in a low temperature and low pressure state after being throttled by the second throttle member 7.
  • the air conditioner system When it is detected that the capacity requirement of the indoor unit is greater than or equal to c% for d minutes, it is determined that the air conditioner system is operated in a non-small load state, and at this time, the first throttle member 6 and the second throttle member 7 are controlled to be closed (of course, The second four-way valve 22 can be controlled to be powered down or not controlled by the second four-way valve 22) to exit the small load control logic. It can be seen that the auxiliary heat exchanger 5 can adjust the load capacity of the air conditioner system to ensure that the compressor 1 can be in an optimal lubrication state.
  • the second four-way valve, the first throttle member and the second throttle member are required in both the control logic shown in FIG. 5 and the control logic shown in FIG. Therefore, when the control conditions in FIG. 5 and the control conditions in FIG. 7 are satisfied, it is necessary to set a control priority.
  • the control priority shown in FIG. 7 is higher than the control priority shown in FIG. 5, that is, when the control condition in FIG. 5 and the control condition in FIG. 7 are satisfied, the execution map is executed. Control logic shown in 7.
  • Fig. 8 is a view showing the configuration of an air conditioner system according to a fourth embodiment of the present invention.
  • an air conditioner system includes: a refrigeration system including at least a compressor 1, a first four-way valve 21, an outdoor heat exchanger 3, and an indoor heat exchanger 4; The second four-way valve 22, the auxiliary heat exchanger 5, the first throttle member 6, and the second throttle member 7.
  • the first port of the second four-way valve 22 is connected to the first four-way valve 21 and the indoor heat exchanger On the line between 4 (the position of B1 in Fig. 8), the second port of the second four-way valve 22 is connected to the first position on the line between the indoor heat exchanger 4 and the outdoor heat exchanger 3 (Fig. 8 The position of A1); the auxiliary heat exchanger 5 has a first passage and a second passage, and the first port of the first passage of the auxiliary heat exchanger 5 communicates with the fourth port of the second four-way valve 22, the auxiliary heat exchanger The second port of the first passage of 5 is connected to the second position on the pipeline between the indoor heat exchanger 4 and the outdoor heat exchanger 3 (the position of A2 in Fig.
  • a port is connected to a third position on the pipeline between the indoor heat exchanger 4 and the outdoor heat exchanger 3 (the position of A3 in Fig. 8), and the second port of the second passage of the auxiliary heat exchanger 5 is connected Any position on the pipeline between the outdoor heat exchanger 3 and the air return port of the compressor 1;
  • the first throttle member 6 is disposed at the first port and the second four-way valve of the first passage of the auxiliary heat exchanger 5 On the line between the fourth ports of 22;
  • the second throttle member 7 is disposed on the line between the first port of the second passage of the auxiliary heat exchanger 5 and the third position.
  • the refrigeration system further includes a third throttle member 8 and a gas-liquid separator 9; wherein the four ports of the first four-way valve 21 are respectively connected to the exhaust port of the compressor 1 and the outdoor heat exchanger 3
  • the first port of the one-port, indoor heat exchanger 4 is in communication with the inlet of the gas-liquid separator 9, and the second port of the outdoor heat exchanger 3 is connected to the second port of the indoor heat exchanger 4 through the third throttle member 8.
  • the outlet of the gas-liquid separator 9 is in communication with the return port of the compressor 1.
  • connection position of the second port of the second channel of the auxiliary heat exchanger 5 may be as follows:
  • the second port of the second passage of the auxiliary heat exchanger 5 is connected to a pipe communicating with the first four-way valve 21 at the inlet of the gas-liquid separator 9.
  • the second port of the second passage of the auxiliary heat exchanger 5 is connected to the pipe in which the first port of the outdoor heat exchanger 3 communicates with the first four-way valve 21.
  • the second port of the second passage of the auxiliary heat exchanger 5 is connected to a pipe communicating with the outlet of the compressor 1 at the outlet of the gas-liquid separator 9.
  • the second port of the second passage of the auxiliary heat exchanger 5 is connected to the first port of the third four-way valve 23, and the second port of the third four-way valve 23 is connected
  • the first port of the outdoor heat exchanger 3 is connected to the first four-way valve 21, and the fourth port of the third four-way valve 23 is connected to the pipe communicating with the first four-way valve 21 at the inlet of the gas-liquid separator 9. on.
  • the two-pass refrigerant enters the gas-liquid separator 9 directly, or passes through the first four-way valve 21 and then enters the gas-liquid separator 9.
  • the air conditioner system further includes: a controller (not shown in FIG. 8) connected to the first throttle member 6, the second throttle member 7, and the second four-way valve 22 for the first throttle The member 6, the second throttle member 7, and the second four-way valve 22 are controlled.
  • the controller is specifically configured to: when the air conditioner system is in a cooling operation, and the air conditioner system is in a small load operation state, control the first throttle member 6 and the second throttle member 7 to be turned on, and The second port of the second four-way valve 22 is controlled to communicate with the fourth port.
  • the first throttle member 6 and the second throttle member 7 are controlled to be opened by the air conditioner system during the cooling operation and in the low load operation state, and the second port of the second four-way valve 22 is controlled.
  • the fourth port is connected such that the refrigerant after passing through the outdoor heat exchanger 3 is divided into two branches, one branch is throttled by the outdoor heat exchanger 3 and the second throttle member 7 and then enters the second of the auxiliary heat exchanger 5
  • the passage, the other branch can directly enter the first passage of the auxiliary heat exchanger 5, and enter the indoor heat exchanger 4 through the second four-way valve 22, and the two refrigerants in the auxiliary heat exchanger 5 exchange heat, that is, the first passage
  • the refrigerant in the two passages is throttled by the second throttle member 7, so that it is evaporated in the auxiliary heat exchanger 5, and the refrigerant in the first passage is condensed, thereby improving the evaporation pressure and the evaporation temperature of the air conditioner system, thereby avoiding The air conditioner system causes a
  • control method proposed by the present invention is as shown in FIG. 9 , and specifically includes:
  • step S90 an operation mode of the air conditioner system is obtained.
  • step S92 it is determined whether the air conditioner system is in a small load operation state.
  • the step of determining whether the air conditioner system is in a small load operation state in step S92 includes: determining whether a sum of capability requirements of all operating indoor units in the air conditioner system is less than or equal to Binary and lasting for a fourth predetermined duration; determining that the air conditioner system is in a small load operation when the sum of the capability requirements of all of the operating indoor units is less than or equal to the second value and continuing for the fourth predetermined duration status.
  • the air conditioner system it is also possible to determine whether the air conditioner system is in a small load operation state according to the number of indoor units in the running state, for example, when the number of indoor units in the running state is small, the air conditioner can be determined.
  • the system is in a small load operation.
  • Step S94 controlling the first throttle member, the second throttle member, and the second four-way valve according to an operation mode of the air conditioner system and whether the air conditioner system is in a small load operation state.
  • step S94 is specifically: controlling the first throttle component and the second throttle component to be turned on when the air conditioner system is in a cooling operation, and determining that the air conditioner system is in a small load operation state, and controlling the first The second port of the two-way valve is in communication with the fourth port.
  • the first throttle member when the first throttle member is disposed on the pipeline between the first port of the first passage and the fourth port of the second four-way valve, if the air conditioner system is cooled and is in a small state In the load running state, the first throttle member and the second throttle member are controlled to be opened, and the second port of the second four-way valve is controlled to communicate with the fourth port, so that the refrigerant after passing through the outdoor heat exchanger is divided into two branches.
  • a branch road is throttled by the outdoor heat exchanger and the second throttle component, and then enters the second passage of the auxiliary heat exchanger, and the other branch can directly enter the first passage of the auxiliary heat exchanger, and passes through the second fourth
  • the valve enters the indoor heat exchanger, and the two refrigerants in the auxiliary heat exchanger exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member, thereby evaporating in the auxiliary heat exchanger, the first passage
  • the inside of the refrigerant is condensed, thereby increasing the evaporation pressure and the evaporation temperature of the air conditioner system, thereby avoiding the problem of oil shortage of the compressor caused by the small load cooling operation of the air conditioner system.
  • the first throttle member and the second throttle member after controlling the first throttle component and the second throttle component to be turned on, further comprising: determining whether the air conditioner system exits the small load operation state; When the air conditioner system exits the small load operating state, the first throttle member and the second throttle member are controlled to be closed.
  • the air conditioner system when it is determined that the air conditioner system exits the small load operation state, by controlling the first throttle member and the second throttle member to be closed, the air conditioner system can operate in a normal operation mode.
  • the step of determining whether the air conditioner system exits the small load operating state specifically includes: determining whether a sum of capability requirements of all operating indoor units in the air conditioner system is greater than Or equal to the first value and last for a third predetermined duration; determining that the air conditioner system exits when the sum of the capability requirements of all the operating indoor units is greater than or equal to the first value and continues for the third predetermined duration The small load operating state.
  • whether the air conditioner system exits the small load operation state may be determined according to the number of indoor units in the running state. For example, when the number of indoor units in the running state is large, the air conditioner system may be determined. Exited the small load operation state.
  • the step of determining whether the air conditioner system is in a small load operation state comprises: determining whether a sum of capability requirements of all operating indoor units in the air conditioner system is less than or equal to a second value And continuing for a fourth predetermined duration; determining that the air conditioner system is in a small load operating state when a sum of capability requirements of all of the operating indoor units is less than or equal to the second value and continues for the fourth predetermined duration.
  • the air conditioner system it is also possible to determine whether the air conditioner system is in a small load operation state according to the number of indoor units in the running state, for example, when the number of indoor units in the running state is small, the air conditioner can be determined.
  • the system is in a small load operation.
  • the first throttle component and the second throttle component after controlling the first throttle component and the second throttle component to be turned on, further comprising: detecting a temperature value of the second port and the first port of the second channel of the auxiliary heat exchanger; a temperature value of the second port of the second passage of the auxiliary heat exchanger and the first port adjusts an opening degree of the second throttle member.
  • the second passage of the auxiliary heat exchanger is mainly for the evaporation of the refrigerant
  • the temperature values of the second port and the first port of the second passage of the auxiliary heat exchanger reflect the evaporation of the auxiliary heat exchanger.
  • the degree of superheat of the side therefore, by adjusting the opening degree of the second throttle member according to the temperature value of the second port and the first port of the second passage of the auxiliary heat exchanger, it is ensured that the amount of refrigerant flowing through the second passage is reasonable In the range.
  • the step of adjusting the opening degree of the second throttle component according to the temperature value of the second port and the first port of the second channel of the auxiliary heat exchanger comprises: calculating the second channel a temperature difference between the second port and the first port;
  • the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three sections during the ascending process, that is, below the first temperature value, and the first temperature value is ⁇
  • the third temperature value continues to rise from the third temperature value; the second port of the second channel of the auxiliary heat exchanger
  • the temperature difference between the first port and the first port is divided into three intervals during the falling process, and is decreased to the fourth temperature value, the fourth temperature value to the second temperature value, and the second temperature value.
  • the first throttling component and the second throttling component after controlling the first throttling component and the second throttling component to be turned on, further comprising: detecting a temperature of the outdoor heat exchanger in the air conditioner system, and detecting the auxiliary heat exchanger a tube temperature of one channel; calculating an average value of a temperature of the outdoor heat exchanger and a tube temperature of the first passage of the auxiliary heat exchanger; a tube temperature according to the first passage of the auxiliary heat exchanger and the average a value that adjusts an opening degree of the first throttle member.
  • the average of the temperature of the outdoor heat exchanger in the air conditioner system and the tube temperature of the first passage of the auxiliary heat exchanger is calculated, and calculated according to the tube temperature sum of the first passage of the auxiliary heat exchanger.
  • the average value is used to adjust the opening degree of the first throttle member, so that the tube temperature of the first passage of the auxiliary heat exchanger can be indirectly controlled by adjusting the opening degree of the first throttle member, thereby ensuring the auxiliary heat exchanger.
  • the tube temperature of the first channel is adapted to the average of all condenser temperatures in the air conditioner system (the first channel of the auxiliary heat exchanger and the outdoor heat exchanger are used as condensers during the air conditioning system cooling operation) to avoid The tube temperature of the first passage of the auxiliary heat exchanger is too low or too high.
  • the step of adjusting the opening degree of the first throttle member according to the tube temperature of the first passage of the auxiliary heat exchanger and the average value specifically comprising: a first passage in the auxiliary heat exchanger When the tube temperature is less than the difference between the average value and the first predetermined value, the opening degree of the first throttle member is increased; the tube temperature of the first passage of the auxiliary heat exchanger is greater than or equal to the average Controlling the opening of the first throttle member to remain unchanged when the value is different from the first predetermined value and less than or equal to the sum of the average value and the second predetermined value; in the auxiliary heat exchanger When the tube temperature of the first channel is greater than the sum of the average value and the second predetermined value, the opening degree of the first throttle member is reduced.
  • the tube temperature of the first passage of the auxiliary heat exchanger when the tube temperature of the first passage of the auxiliary heat exchanger is less than the difference between the average value and the first predetermined value, it indicates that the tube temperature of the first passage of the auxiliary heat exchanger is lower, that is, the amount of refrigerant is lower.
  • the opening degree of the first throttle member can be increased; conversely, when the tube temperature of the first passage of the auxiliary heat exchanger is greater than the sum of the above average value and the second predetermined value, the number of the auxiliary heat exchanger is indicated G
  • the tube temperature of the channel is relatively high, that is, the amount of refrigerant is large, so the opening degree of the first throttle member can be adjusted; and the tube temperature of the first passage of the auxiliary heat exchanger is greater than or equal to the above average value and the first predetermined value.
  • the difference is less than or equal to the sum of the average value and the second predetermined value, it indicates that the tube temperature of the first channel of the auxiliary heat exchanger is within a normal range, so that the opening degree of the first throttle member can be controlled to remain unchanged.
  • the present invention is directed to the structure of the above air conditioner system, and corresponding control means are also separately proposed.
  • the control device 100 of the air conditioner system includes: an acquisition unit 102, the determining unit 104 or the first detecting unit 106, and the control unit 108.
  • the obtaining unit 102 is configured to acquire an operating mode of the air conditioner system; the determining unit 104 is configured to determine whether the air conditioner system is in a small load running state; the first detecting unit 106 is configured to detect an outdoor ambient temperature and the compressing Exhaust superheat of the machine; the control unit 108 is configured to operate according to the air conditioner system, and the outdoor ambient temperature and the exhaust superheat detected by the first detecting unit 106 or the air conditioner Whether the system is in a low load operating state controls the first throttle member, the second throttle member, and the second four-way valve.
  • control operation of the control unit 108 specifically has the following two embodiments:
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • control unit 108 is specifically configured to: perform heating operation in the air conditioner system, and the first detecting unit 106 detects that the outdoor ambient temperature is less than or equal to the first set temperature value, and the exhaust of the compressor When the degree of superheat is less than or equal to the first set superheat and continues for the first predetermined period of time, the first throttle member and the second throttle member are controlled to be opened, and the second port of the second four-way valve is controlled to communicate with the fourth port.
  • the outdoor ambient temperature is less than or equal to the first set temperature value
  • the exhaust superheat of the compressor is less than or equal to the first set superheat for the first predetermined duration.
  • the refrigerant exchanges heat that is, the refrigerant in the second passage passes through the second throttle member section
  • the flow therefore, evaporates in the auxiliary heat exchanger, and the refrigerant in the first passage is condensed, thereby increasing the evaporation pressure and the evaporation temperature of the air conditioner system, effectively
  • control unit 108 is further configured to: after the first throttle unit and the second throttle unit are controlled to be turned on, if the first detecting unit 106 detects that the exhaust superheat of the compressor is greater than Or equal to the second set superheat and last for a second predetermined duration, or detecting that the outdoor ambient temperature is greater than or equal to the second set temperature value, controlling the first throttle component and the second throttle component shut down.
  • the air conditioner system when it is detected that the exhaust superheat degree of the compressor is greater than or equal to the second set superheat degree for a second predetermined duration, or the outdoor ambient temperature is greater than or equal to the second set temperature value,
  • the air conditioner system is not a low temperature heating operation, in which case the first throttle member and the second throttle member can be controlled to be closed to operate the air conditioner system in a normal manner.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • control unit 108 is specifically configured to: when the air conditioner system is heating and running, and the determining unit 104 determines that the air conditioner system is in a small load operation state, controlling the first throttle component and the The second throttle member is opened, and the first port of the second four-way valve is controlled to communicate with the fourth port.
  • the first throttle member and the second throttle member are controlled to be opened when the air conditioner system is heating and operating in a small load operation state, and the first port and the fourth port of the second four-way valve are controlled.
  • the ports are connected such that the refrigerant after passing through the first four-way valve is divided into two branches, one branch is throttled by the indoor heat exchanger and the second throttle member, and then enters the second passage of the auxiliary heat exchanger, and the other branch
  • the road can directly enter the first passage of the auxiliary heat exchanger through the second four-way valve, and the two refrigerants exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member, and therefore in the auxiliary heat exchanger Evaporation, the refrigerant in the first passage is condensed, thereby improving the evaporation pressure and the evaporation temperature of the air conditioner system, and avoiding the problem of oil shortage of the compressor caused by the small load heating operation of the air conditioner system.
  • it can also improve the overall heat exchange
  • the determining unit 104 is further configured to: after the control unit 108 controls the first throttling component and the second throttling component to be turned on, determine whether the air conditioner system exits the small load running state; The control unit 108 is further configured to exit the small in the air conditioner system In the load operating state, the first throttle member and the second throttle member are controlled to be closed.
  • the air conditioner system when it is determined that the air conditioner system exits the small load operation state, by controlling the first throttle member and the second throttle member to be closed, the air conditioner system can operate in a normal operation mode.
  • the determining unit 104 is specifically configured to: determine whether a sum of capability requirements of all operating indoor units in the air conditioner system is greater than or equal to a first value and last for a third predetermined duration; in all the operating indoor units When the sum of the capability requirements is greater than or equal to the first value and continues for the third predetermined time period, it is determined that the air conditioner system exits the small load operation state.
  • whether the air conditioner system exits the small load operation state may be determined according to the number of indoor units in the running state. For example, when the number of indoor units in the running state is large, the air conditioner system may be determined. Exited the small load operation state.
  • the determining unit 104 is further configured to: determine whether a sum of capability requirements of all operating indoor units in the air conditioner system is less than or equal to a second value and last for a fourth predetermined duration; in all the operating indoor units It is determined that the air conditioner system is in a small load operation state when the sum of the capability demands is less than or equal to the second value and continues for the fourth predetermined time length.
  • the air conditioner system it is also possible to determine whether the air conditioner system is in a small load operation state according to the number of indoor units in the running state, for example, when the number of indoor units in the running state is small, the air conditioner can be determined.
  • the system is in a small load operation.
  • control device 100 of the air conditioner system further includes: a second detecting unit 110 and a first adjusting unit 112.
  • the second detecting unit 110 is configured to detect the second port and the first channel of the second channel of the auxiliary heat exchanger after the control unit 108 controls the first throttle component and the second throttle component to be turned on.
  • the temperature value of the port; the first adjusting unit 112 is configured to adjust the opening degree of the second throttle member according to the temperature value of the second port and the first port of the second passage of the auxiliary heat exchanger.
  • the second passage of the auxiliary heat exchanger is mainly for the evaporation of the refrigerant
  • the temperature values of the second port and the first port of the second passage of the auxiliary heat exchanger reflect the evaporation of the auxiliary heat exchanger.
  • the degree of superheat of the side therefore, by adjusting the opening degree of the second throttle member according to the temperature value of the second port and the first port of the second passage of the auxiliary heat exchanger, it is ensured that the amount of refrigerant flowing through the second passage is reasonable In the range.
  • the first adjusting unit 112 includes: a first calculation form Element 1122 executes unit 1124.
  • the first calculating unit 1122 is configured to calculate a temperature difference between the second port of the second channel and the first port.
  • the executing unit 1124 is configured to adjust the opening degree of the second throttle component in a process in which the temperature difference value rises to a first temperature value, and in a process in which the temperature difference value is decreased by the second temperature value a small first opening; wherein the temperature difference is increased from the first temperature value to the third temperature value, and wherein the temperature difference is decreased from the fourth temperature value to the second temperature value Controlling the opening degree of the second throttle member to remain unchanged; during the process in which the temperature difference continues to rise from the third temperature value, and the temperature difference decreases to the fourth During the temperature value, the opening degree of the second throttle member is increased by a second opening degree.
  • the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three sections during the ascending process, that is, below the first temperature value, and the first temperature value is ⁇
  • the third temperature value continues to rise from the third temperature value; the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three intervals during the descending process, and is decreased to the fourth temperature.
  • the greater the temperature difference between the second port and the first port of the second passage of the auxiliary heat exchanger the more the refrigerant demand in the second passage is required, so that the opening of the second throttle member can be appropriately adjusted.
  • the temperature difference between the second port and the first port of the second channel of the auxiliary heat exchanger is smaller, the less the demand of the refrigerant in the second channel is, so the second can be appropriately adjusted.
  • the opening of the throttle component is smaller, the less the demand of the refrig
  • control device 100 of the air conditioner system further includes: a third detecting unit 114, a second calculating unit 116, and a second adjusting unit 118.
  • the third detecting unit 114 is configured to detect an indoor heat exchanger of the indoor unit in the operating state in the air conditioner system after the control unit 108 controls the first throttle component and the second throttle component to be turned on. Temperature, and detecting a tube temperature of the first passage of the auxiliary heat exchanger; the second calculating unit 116 is configured to calculate an indoor heat exchanger temperature of the indoor unit in an operating state in the air conditioner system and the auxiliary heat exchanger The average value of the tube temperature of the first passage; the second adjusting unit 118 is configured to adjust the opening degree of the first throttle member according to the tube temperature of the first passage of the auxiliary heat exchanger and the average value.
  • the indoor heat exchanger of the indoor unit is used as a condenser to prevent the tube temperature of the first passage of the auxiliary heat exchanger from being too low or too high.
  • the second adjusting unit 118 is specifically configured to: when the tube temperature of the first channel of the auxiliary heat exchanger is less than the difference between the average value and the first predetermined value, An opening degree of the first throttle member; a tube temperature of the first passage of the auxiliary heat exchanger is greater than or equal to a difference between the average value and the first predetermined value, and less than or equal to the average value and Controlling, by the sum of the second predetermined values, the opening of the first throttle member remains unchanged; the tube temperature of the first passage of the auxiliary heat exchanger is greater than the average value and the second predetermined value And, the opening degree of the first throttle member is reduced.
  • the tube temperature of the first passage of the auxiliary heat exchanger when the tube temperature of the first passage of the auxiliary heat exchanger is less than the difference between the average value and the first predetermined value, it indicates that the tube temperature of the first passage of the auxiliary heat exchanger is lower, that is, the amount of refrigerant is lower.
  • the opening degree of the first throttle member can be increased; conversely, when the tube temperature of the first passage of the auxiliary heat exchanger is greater than the sum of the above average value and the second predetermined value, the number of the auxiliary heat exchanger is indicated
  • the temperature of the pipe of one channel is higher, that is, the amount of refrigerant is larger, so the opening degree of the first throttle component can be adjusted smaller; and the pipe temperature of the first channel of the auxiliary heat exchanger is greater than or equal to the above average value and the first predetermined
  • the difference between the values and less than or equal to the sum of the above average value and the second predetermined value indicates that the tube temperature of the first passage of the auxiliary heat exchanger is within a normal range, so that the opening degree of the first throttle member can be controlled to remain unchanged. change.
  • the control device 200 of the air conditioner system includes: an acquisition unit 202, a determination unit 204, and a control Unit 206.
  • the obtaining unit 202 is configured to acquire an operating mode of the air conditioner system; the determining unit 204 is configured to determine whether the air conditioner system is in a small load running state; the control unit 206 is configured to operate according to the air conditioner system, and the air conditioner system. Whether it is in a small load operation state, the first throttle member, the second throttle member, and the second four-way valve are controlled.
  • the control unit 206 is specifically configured to: when the air conditioner system is in a cooling operation, and the determining unit 204 determines that the air conditioner system is in a small load operation state, controlling the first throttle component And the second throttle member is opened, and the second port of the second four-way valve is controlled to communicate with the fourth port.
  • the first throttle member when the first throttle member is disposed on the pipeline between the first port of the first passage and the fourth port of the second four-way valve, if the air conditioner system is cooled and is in a small state In the load running state, the first throttle member and the second throttle member are controlled to be opened, and the second port of the second four-way valve is controlled to communicate with the fourth port, so that the refrigerant after passing through the outdoor heat exchanger is divided into two branches.
  • a branch road is throttled by the outdoor heat exchanger and the second throttle component, and then enters the second passage of the auxiliary heat exchanger, and the other branch can directly enter the first passage of the auxiliary heat exchanger, and passes through the second fourth
  • the valve enters the indoor heat exchanger, and the two refrigerants in the auxiliary heat exchanger exchange heat, that is, the refrigerant in the second passage is throttled by the second throttle member, thereby evaporating in the auxiliary heat exchanger, the first passage
  • the inside of the refrigerant is condensed, thereby increasing the evaporation pressure and the evaporation temperature of the air conditioner system, thereby avoiding the problem of oil shortage of the compressor caused by the small load cooling operation of the air conditioner system.
  • the determining unit 204 is further configured to: after the control unit 206 controls the first throttling component and the second throttling component to be turned on, determine whether the air conditioner system exits the small load running state; The control unit 206 is further configured to control the first throttle member and the second throttle member to be closed when the air conditioner system exits the small load operation state.
  • the air conditioner system when it is determined that the air conditioner system exits the small load operation state, by controlling the first throttle member and the second throttle member to be closed, the air conditioner system can operate in a normal operation mode.
  • the determining unit 204 is specifically configured to: determine whether a sum of capability requirements of all running indoor units in the air conditioner system is greater than or equal to a first value and last for a third predetermined duration; in all the running indoors When the sum of the capability requirements of the machine is greater than or equal to the first value and continues for the third predetermined time period, it is determined that the air conditioner system exits the small load operation state.
  • whether the air conditioner system exits the small load operation state may be determined according to the number of indoor units in the running state. For example, when the number of indoor units in the running state is large, the air conditioner system may be determined. Exited the small load operation state.
  • the determining unit 204 is further configured to: determine whether a sum of capability requirements of all operating indoor units in the air conditioner system is less than or equal to a second value and last for a fourth predetermined duration; The sum of the capacity requirements of the indoor unit is less than or equal to the second value And when the fourth predetermined duration is continued, it is determined that the air conditioner system is in a small load operation state.
  • the air conditioner system it is also possible to determine whether the air conditioner system is in a small load operation state according to the number of indoor units in the running state, for example, when the number of indoor units in the running state is small, the air conditioner can be determined.
  • the system is in a small load operation.
  • control device 200 of the air conditioner system further includes: a second detecting unit 208 and a first adjusting unit 210.
  • the second detecting unit 208 is configured to detect the second port and the first port of the second channel of the auxiliary heat exchanger after the control unit 206 controls the first throttle component and the second throttle component to be turned on.
  • the temperature value of the port; the first adjusting unit 210 is configured to adjust an opening degree of the second throttle member according to a temperature value of the second port and the first port of the second channel of the auxiliary heat exchanger.
  • the second passage of the auxiliary heat exchanger is mainly for the evaporation of the refrigerant
  • the temperature values of the second port and the first port of the second passage of the auxiliary heat exchanger reflect the evaporation of the auxiliary heat exchanger.
  • the degree of superheat of the side therefore, by adjusting the opening degree of the second throttle member according to the temperature value of the second port and the first port of the second passage of the auxiliary heat exchanger, it is ensured that the amount of refrigerant flowing through the second passage is reasonable In the range.
  • the first adjustment unit 210 includes: a first calculation unit 2102 and an execution unit 2104.
  • the first calculating unit 2102 calculates a temperature difference between the second port of the second channel and the first port.
  • the executing unit 2104 is configured to: when the temperature difference is raised to the first temperature value, and during the process that the temperature difference is decreased by the second temperature value, the opening of the second throttle component Decreasing a first opening degree; wherein the temperature difference is increased from the first temperature value to a third temperature value, and wherein the temperature difference is decreased from the fourth temperature value to the second temperature value Controlling the opening of the second throttle member to remain unchanged; during the process in which the temperature difference continues to rise from the third temperature value, and the temperature difference drops to the first During the four temperature values, the opening of the second throttle member is increased by a second opening.
  • the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three sections during the ascending process, that is, below the first temperature value, and the first temperature value is ⁇
  • the third temperature value continues to rise from the third temperature value; the temperature difference between the second port of the second passage of the auxiliary heat exchanger and the first port is divided into three intervals during the descending process, and is decreased to the fourth temperature.
  • the greater the temperature difference between the second port and the first port of the second passage of the auxiliary heat exchanger the more the refrigerant demand in the second passage is required, so that the opening of the second throttle member can be appropriately adjusted.
  • the temperature difference between the second port and the first port of the second channel of the auxiliary heat exchanger is smaller, the less the demand of the refrigerant in the second channel is, so the second can be appropriately adjusted.
  • the opening of the throttle component is smaller, the less the demand of the refrig
  • control device 200 of the air conditioner system further includes: a third detecting unit 212, configured to detect the air conditioner after the control unit 206 controls the first throttle member and the second throttle member to be turned on a temperature of the outdoor heat exchanger in the system, and detecting a tube temperature of the first passage of the auxiliary heat exchanger; a second calculating unit 214, configured to calculate a temperature of the outdoor heat exchanger and the auxiliary heat exchanger The average value of the tube temperature of the first channel; the second adjusting unit 216 is configured to adjust the opening degree of the first throttle member according to the tube temperature of the first channel of the auxiliary heat exchanger and the average value.
  • a third detecting unit 212 configured to detect the air conditioner after the control unit 206 controls the first throttle member and the second throttle member to be turned on a temperature of the outdoor heat exchanger in the system, and detecting a tube temperature of the first passage of the auxiliary heat exchanger
  • a second calculating unit 214 configured to calculate a temperature of the outdoor heat exchanger and the auxiliary heat exchanger
  • the average of the temperature of the outdoor heat exchanger in the air conditioner system and the tube temperature of the first passage of the auxiliary heat exchanger is calculated, and calculated according to the tube temperature sum of the first passage of the auxiliary heat exchanger.
  • the average value is used to adjust the opening degree of the first throttle member, so that the tube temperature of the first passage of the auxiliary heat exchanger can be indirectly controlled by adjusting the opening degree of the first throttle member, thereby ensuring the auxiliary heat exchanger.
  • the tube temperature of the first channel is adapted to the average of all condenser temperatures in the air conditioner system (the first channel of the auxiliary heat exchanger and the outdoor heat exchanger are used as condensers during the air conditioning system cooling operation) to avoid The tube temperature of the first passage of the auxiliary heat exchanger is too low or too high.
  • the second adjusting unit 216 is specifically configured to: when the tube temperature of the first channel of the auxiliary heat exchanger is less than a difference between the average value and the first predetermined value, increase the first throttle a degree of opening of the component; a tube temperature of the first channel of the auxiliary heat exchanger being greater than or equal to a difference between the average value and the first predetermined value, and less than or equal to the average value and a second predetermined value And controlling the opening degree of the first throttle member to remain unchanged; when the tube temperature of the first passage of the auxiliary heat exchanger is greater than a sum of the average value and the second predetermined value, The opening degree of the first throttle member.
  • the tube temperature of the first passage of the auxiliary heat exchanger when the tube temperature of the first passage of the auxiliary heat exchanger is less than the difference between the average value and the first predetermined value, it indicates that the tube temperature of the first passage of the auxiliary heat exchanger is lower, that is, the amount of refrigerant is lower.
  • the opening degree of the first throttle member can be increased; conversely, when the tube temperature of the first passage of the auxiliary heat exchanger is greater than the sum of the above average value and the second predetermined value, the number of the auxiliary heat exchanger is indicated G
  • the tube temperature of the channel is relatively high, that is, the amount of refrigerant is large, so the opening degree of the first throttle member can be adjusted; and the tube temperature of the first passage of the auxiliary heat exchanger is greater than or equal to the above average value and the first predetermined value.
  • the difference is less than or equal to the sum of the average value and the second predetermined value, it indicates that the tube temperature of the first channel of the auxiliary heat exchanger is within a normal range, so that the opening degree of the first throttle member can be controlled to remain unchanged.
  • the above air conditioner system of the present invention may be a multi-connected air conditioner system or an ordinary household air conditioner.
  • the present invention provides a new air conditioner system and a control method thereof, which effectively avoids the problem of oil shortage damage of the compressor caused by long-time small load operation of the air conditioner system, and also It can enhance the low temperature heating capacity of the air conditioner system.

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Abstract

一种空调系统,包括压缩机(1)、第一四通阀(21)、室外换热器(3)、室内换热器(4)、第二四通阀(22)、辅助换热器(5)、第一节流部件(6)和第二节流部件(7)。第二四通阀(22)的第一端口和第二端口分别连接至第一四通阀(21)和室内换热器(4)之间以及室内换热器(4)和室外换热器(3)之间。辅助换热器(5)具有第一和第二通道,第一通道第一和第二端口分别连接至第二四通阀(22)的第四端口以及室内换热器(4)和室外换热器(3)之间;第二通道的第一和第二端口分别连接至室内换热器(4)和室外换热器(3)之间以及室外换热器(3)和压缩机(1)回气口之间。第一节流部件(6)和第二节流部件(7)分别设置在第一通道以及第二通道的管路上。

Description

空调器系统和空调器系统的控制方法
本申请要求于2016年08月29日提交中国专利局、申请号为201610750556.1、发明名称为“空调器系统和空调器系统的控制方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及空调器技术领域,具体而言,涉及一种空调器系统和一种空调器系统的控制方法。
背景技术
随着人们生活水平的提高和节能意识的增强,空调器逐渐得到了广泛普及。当空调器在低温环境下制热运行时,室外换热器的温度比较低,并且容易结霜,进而会大大降低冷媒从空气中吸收的热量,导致空调器的制热效果变差,影响用户的使用效果。
同时,由于多联机空调系统的配管较长、落差较大、系统较复杂等原因,压缩机必须时刻处于有效的润滑状态才能保证系统的可靠运行。如果压缩机长期处于小负荷运行状态,则系统的润滑油不能及时返回到压缩机,进而会造成压缩机由于润滑不良而损坏,影响了整个机组的可靠性。
发明内容
本发明旨在至少解决现有技术或相关技术中存在的技术问题之一。
为此,本发明的一个目的在于提出了一种新的空调器系统,有效避免空调器系统长时间小负荷运行导致压缩机缺油损坏的问题,同时也能够增强空调器系统的低温制热能力。
本发明的另一个目的在于对应提出了一种空调器系统的控制方法及控制装置。
为实现上述目的,根据本发明的第一方面的实施例,提出了一种空调器系统,包括:至少包含压缩机、第一四通阀、室外换热器和室内换热器的制冷系统;第二四通阀,所述第二四通阀的第一端口连接在所述第一四通阀和所述室内换热器之间的管路上,所述第二四通阀的第二端口连接在所述室内换热器和所述室外换热器之间管路上的第一位置;辅助换热器,具有第一通道和第二通道,所述第一通道的第一端口与所述第二四通阀的第四端口相连通,所述第一通道的第二端口连接在所述室内换热器和所述室外换热器之间管路上的第二位置,所述第二通道的第一端口连接在所述室内换热器和所述室外换热器之间管路上的第三位置,所述第二通道的第二端口连接在所述室外换热器与所述压缩机的回气口之间管路上的任意位置;第一节流部件,设置在所述第一通道的第二端口与所述第二位置之间的管路上,或设置在所述第一通道的第一端口与所述第二四通阀的第四端口之间的管路上;第二节流部件,设置在所述第二通道的第一端口与所述第三位置之间的管路上。
根据本发明的实施例的空调器系统,通过设置第二四通阀和辅助换热器,并设置第一节流部件和第二节流部件,使得在第一节流部件设置在第一通道的第二端口与第二位置之间的管路上时,若空调器系统制热运行且处于小负荷运行状态,则可以控制第一节流部件和第二节流部件开启,并控制第二四通阀的第一端口与第四端口连通,这样经过第一四通阀之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制热运行时导致压缩机缺油损坏的问题。同时也能够提高空调器机组的整体换热量,增强了空调器系统的低温制热能力。
而在第一节流部件设置在第一通道的第一端口与所述第二四通阀的第四端口之间的管路上时,若空调器系统制冷运行且处于小负荷运行状态,则可以控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二 端口与第四端口连通,这样经过室外换热器之后的冷媒分为两个支路,一条支路经过室外换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接进入辅助换热器的第一通道,并经过第二四通阀进入室内换热器蒸发换热,辅助换热器内的两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制冷运行时导致压缩机缺油损坏的问题。
此外,当第一节流部件设置在第一通道的第二端口与第二位置之间的管路上,且空调器系统在低温环境下制热运行时,可以控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,这样经过室内换热器之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,有效利用了冷凝后的冷媒热量,提高了空调器系统的整体换热量,增强了空调器系统的低温制热能力。
根据本发明的上述实施例的空调器系统,还可以具有以下技术特征:
根据本发明的一个实施例,所述制冷系统还包括第三节流部件和气液分离器;其中,所述第一四通阀的四个端口分别与所述压缩机的排气口、所述室外换热器的第一端口、所述室内换热器的第一端口和所述气液分离器的入口相连通,所述室外换热器的第二端口通过所述第三节流部件与所述室内换热器的第二端口相连通,所述气液分离器的出口与所述压缩机的回气口相连通;
所述第二通道的第二端口连接在所述室外换热器的第一端口与所述第一四通阀连通的管道上、所述气液分离器的入口与所述第一四通阀连通的管道上或所述气液分离器的出口与所述压缩机的回气口连通的管道上。
根据本发明的一个实施例,所述的空调器系统还包括:控制器,连接至所述第一节流部件、所述第二节流部件和所述第二四通阀,用于对所述 第一节流部件、所述第二节流部件和所述第二四通阀进行控制。
根据本发明的一个实施例,所述控制器具体用于:在所述第一节流部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,若所述空调器系统制热运行,并检测到所述室外环境温度小于或等于第一设定温度值、所述压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第二端口与第二位置之间的管路上时,若空调器系统制热运行,室外环境温度小于或等于第一设定温度值、压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室内换热器之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,有效利用了冷凝后的冷媒热量,提高了空调器系统的整体换热量,增强了空调器系统的低温制热能力。
根据本发明的一个实施例,所述控制器具体用于:在所述第一节流部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,若所述空调器系统制热运行,且所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第一端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第二端口与第二位置之间的管路上时,若空调器系统制热运行且处于小负荷运行状态,则可以控制第一节流部件和第二节流部件开启,并控制第二四通阀的第一端口与第四端口连通,使得经过第一四通阀之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路 冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制热运行时导致压缩机缺油损坏的问题。同时也能够提高空调器机组的整体换热量,增强了空调器系统的低温制热能力。
根据本发明的一个实施例,所述控制器具体用于:在所述第一节流部件设置在所述第一通道的第一端口与所述第二四通阀的第四端口之间的管路上的情况下,若所述空调器系统制冷运行,且所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第一端口与所述第二四通阀的第四端口之间的管路上时,若空调器系统制冷运行且处于小负荷运行状态,则控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室外换热器之后的冷媒分为两个支路,一条支路经过室外换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接进入辅助换热器的第一通道,并经过第二四通阀进入室内换热器,辅助换热器内的两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制冷运行时导致压缩机缺油损坏的问题。
根据本发明的第二方面的实施例,还提出了一种空调器系统的控制方法,用于对如上述实施例中任一项所述的空调器系统进行控制,所述控制方法包括:获取所述空调器系统的运行模式;判断所述空调器系统是否处于小负荷运行状态,或检测室外环境温度和所述压缩机的排气过热度;根据所述空调器系统的运行模式,以及检测到的所述室外环境温度和所述排气过热度或所述空调器系统是否处于小负荷运行状态,对所述第一节流部件、所述第二节流部件和所述第二四通阀进行控制。
根据本发明的实施例的空调器系统的控制方法,通过根据空调器系统的运行模式,以及空调器系统是否处于小负荷运行状态或室外环境温度和 排气过热度,来对第一节流部件、第二节流部件和第二四通阀进行控制,使得空调器系统在小负荷运行或低温制热运行时,能够控制第一节流部件和第二节流部件开启,并控制第二四通阀的相应端口连通,进而将辅助换热器接入制冷系统进行运行,提高了空调器系统的整体换热量,避免了空调器系统长时间处于小负荷运行状态而导致压缩机缺油损坏的问题,同时也能够增强空调器系统的低温制热能力。
根据本发明的一个实施例,根据所述空调器系统的运行模式,以及检测到的所述室外环境温度和所述排气过热度,对所述第一节流部件、所述第二节流部件和所述第二四通阀进行控制的步骤,具体包括:
在所述第一节流部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,若所述空调器系统制热运行,且检测到所述室外环境温度小于或等于第一设定温度值、所述压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第二端口与第二位置之间的管路上时,若空调器系统制热运行,室外环境温度小于或等于第一设定温度值、压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室内换热器之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,有效利用了冷凝后的冷媒热量,提高了空调器系统的整体换热量,增强了空调器系统的低温制热能力。
进一步地,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:在检测到所述压缩机的排气过热度大于或等于第二设定过热度且持续第二预定时长,或检测到所述室外环境温度大于或等于第二设定温度值时,控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当检测到压缩机的排气过热度大于或等于第二设定过热度且持续第二预定时长,或检测到室外环境温度大于或等于第二设定温度值时,说明空调器系统并非是低温制热运行,此时可以控制第一节流部件和第二节流部件关闭,以使空调器系统按照正常方式运行。
根据本发明的一个实施例,根据所述空调器系统的运行模式,以及所述空调器系统是否处于小负荷运行状态,对所述第一节流部件和所述第二节流部件进行控制的步骤,具体包括:
在所述第一节流部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,若所述空调器系统制热运行,且判定所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第一端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第二端口与第二位置之间的管路上时,若空调器系统制热运行且处于小负荷运行状态,则可以控制第一节流部件和第二节流部件开启,并控制第二四通阀的第一端口与第四端口连通,使得经过第一四通阀之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制热运行时导致压缩机缺油损坏的问题。同时也能够提高空调器机组的整体换热量,增强了空调器系统的低温制热能力。
根据本发明的一个实施例,根据所述空调器系统的运行模式,以及所述空调器系统是否处于小负荷运行状态,对所述第一节流部件和所述第二节流部件进行控制的步骤,具体包括:
在所述第一节流部件设置在所述第一通道的第一端口与所述第二四通阀的第四端口之间的管路上的情况下,若所述空调器系统制冷运行,且判定所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第一端口与所述第二四通阀的第四端口之间的管路上时,若空调器系统制冷运行且处于小负荷运行状态,则控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室外换热器之后的冷媒分为两个支路,一条支路经过室外换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接进入辅助换热器的第一通道,并经过第二四通阀进入室内换热器,辅助换热器内的两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制冷运行时导致压缩机缺油损坏的问题。
根据本发明的一个实施例,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:判断所述空调器系统是否退出所述小负荷运行状态;在所述空调器系统退出所述小负荷运行状态时,控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当判定空调器系统退出小负荷运行状态时,通过控制第一节流部件和第二节流部件关闭,使得空调器系统能够按照正常的运行方式进行工作。
其中,在本发明的一个实施例中,判断所述空调器系统是否退出所述小负荷运行状态的步骤,具体包括:判断所述空调器系统中所有运行的室内机的能力需求的总和是否大于或等于第一值且持续第三预定时长;在所述所有运行的室内机的能力需求的总和大于或等于所述第一值且持续所述第三预定时长时,判定所述空调器系统退出所述小负荷运行状态。
其中,所有运行的室内机的能力需求的总和既可以直接通过能力需求的实际数值来表示,也可以通过比值的形式(即所有运行的室内机的能力需求的实际数值与空调器系统能够提供的总能力需求的比值)来表示。当通过能力需求的实际数值来表示时,第一值是实际数值;当通过比值的形式来表示时,第一值是处于0与1之间的常数。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否退出小负荷运行状态,譬如处于运行状态的室内 机的台数较多时,可以确定空调器系统退出了小负荷运行状态。
根据本发明的一个实施例,判断所述空调器系统是否处于小负荷运行状态的步骤,具体包括:判断所述空调器系统中所有运行的室内机的能力需求的总和是否小于或等于第二值且持续第四预定时长;在所述所有运行的室内机的能力需求的总和小于或等于所述第二值且持续所述第四预定时长时,判定所述空调器系统处于小负荷运行状态。
其中,所有运行的室内机的能力需求的总和既可以直接通过能力需求的实际数值来表示,也可以通过比值的形式(即所有运行的室内机的能力需求的实际数值与空调器系统能够提供的总能力需求的比值)来表示。当通过能力需求的实际数值来表示时,第二值是实际数值;当通过比值的形式来表示时,第二值是处于0与1之间的常数。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否处于小负荷运行状态,譬如处于运行状态的室内机的台数较少时,可以确定空调器系统处于小负荷运行状态。
根据本发明的一个实施例,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:检测所述辅助换热器的第二通道的第二端口和第一端口的温度值;根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调节所述第二节流部件的开度。
在该实施例中,由于辅助换热器的第二通道主要是进行冷媒的蒸发,而辅助换热器的第二通道的第二端口和第一端口的温度值反映了辅助换热器的蒸发侧的过热度,因此通过根据辅助换热器的第二通道的第二端口和第一端口的温度值来调节第二节流部件的开度,可以确保流经第二通道的冷媒量处于合理的范围内。
根据本发明的一个实施例,根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调节所述第二节流部件的开度的步骤,具体包括:计算所述第二通道的第二端口和第一端口之间的温度差值;
在所述温度差值上升至第一温度值的过程中,以及在所述温度差值由第二温度值下降的过程中,将所述第二节流部件的开度调小第一开度;在所述温度差值由所述第一温度值上升至第三温度值的过程中,以及在所述 温度差值由第四温度值下降至所述第二温度值的过程中,控制所述第二节流部件的开度保持不变;在所述温度差值由所述第三温度值继续上升的过程中,以及在所述温度差值下降至所述第四温度值的过程中,将所述第二节流部件的开度调大第二开度。
在该实施例中,辅助换热器的第二通道的第二端口和第一端口之间的温度差值在上升过程中分为三个区间,即第一温度值以下、第一温度值~第三温度值、由第三温度值继续上升;辅助换热器的第二通道的第二端口和第一端口之间的温度差值在下降过程中分为三个区间,下降至第四温度值、第四温度值~第二温度值、第二温度值以下。由于辅助换热器的第二通道的第二端口和第一端口之间的温度差值越大,说明第二通道内的冷媒需求量越多,因此可以适当调大第二节流部件的开度;相反地,若辅助换热器的第二通道的第二端口和第一端口之间的温度差值越小,说明第二通道内的冷媒需求量越少,因此可以适当调小第二节流部件的开度。
根据本发明的一个实施例,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:检测所述空调器系统中当前作为冷凝器使用的换热器的温度,并检测所述辅助换热器的第一通道的管温;计算所述空调器系统中当前作为冷凝器使用的换热器的温度和所述辅助换热器的第一通道的管温的平均值;根据所述辅助换热器的第一通道的管温和所述平均值,调节所述第一节流部件的开度。
在该实施例中,若空调器系统以制热模式运行,则处于运行状态的室内机的室内换热器作为冷凝器使用;若空调器系统以制冷模式运行,则室外机中的室外换热器是作为冷凝器使用。通过计算空调器系统中当前作为冷凝器使用的换热器的温度和辅助换热器的第一通道(作为辅助换热器的冷凝侧)的管温的平均值,并根据辅助换热器的第一通道的管温和计算得到的平均值来调节第一节流部件的开度,使得能够通过对第一节流部件的开度进行调整来间接控制辅助换热器的第一通道的管温,进而保证辅助换热器的第一通道的管温与空调器系统中所有冷凝器温度的平均值相适应,避免辅助换热器的第一通道的管温过低或过高。
根据本发明的一个实施例,根据所述辅助换热器的第一通道的管温和 所述平均值,调节所述第一节流部件的开度的步骤,具体包括:在所述辅助换热器的第一通道的管温小于所述平均值与第一预定值之差时,调大所述第一节流部件的开度;在所述辅助换热器的第一通道的管温大于或等于所述平均值与所述第一预定值之差,且小于或等于所述平均值与第二预定值之和时,控制所述第一节流部件的开度保持不变;在所述辅助换热器的第一通道的管温大于所述平均值与所述第二预定值之和时,调小所述第一节流部件的开度。
在该实施例中,当辅助换热器的第一通道的管温小于上述平均值与第一预定值之差时,说明辅助换热器的第一通道的管温较低,即冷媒量较少,因此可以调大第一节流部件的开度;相反地,当辅助换热器的第一通道的管温大于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温较高,即冷媒量较多,因此可以调小第一节流部件的开度;而在辅助换热器的第一通道的管温大于或等于上述平均值与第一预定值之差,且小于或等于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温处于正常范围内,因此可以控制第一节流部件的开度保持不变。
根据本发明的第三方面的实施例,还提出了一种空调器系统的控制装置,用于对如上述实施例中任一项所述的空调器系统进行控制,所述控制装置包括:获取单元,用于获取所述空调器系统的运行模式;判断单元,判断所述空调器系统是否处于小负荷运行状态,或第一检测单元,用于检测室外环境温度和所述压缩机的排气过热度;控制单元,用于根据所述空调器系统的运行模式,以及所述第一检测单元检测到的所述室外环境温度和所述排气过热度或所述空调器系统是否处于小负荷运行状态,对所述第一节流部件、所述第二节流部件和所述第二四通阀进行控制。
根据本发明的实施例的空调器系统的控制装置,通过根据空调器系统的运行模式,以及空调器系统是否处于小负荷运行状态或室外环境温度和排气过热度,来对第一节流部件、第二节流部件和第二四通阀进行控制,使得空调器系统在小负荷运行或低温制热运行时,能够控制第一节流部件和第二节流部件开启,并控制第二四通阀的相应端口连通,进而将辅助换热器接入制冷系统进行运行,提高了空调器系统的整体换热量,避免了空 调器系统长时间处于小负荷运行状态而导致压缩机缺油损坏的问题,同时也能够增强空调器系统的低温制热能力。
根据本发明的一个实施例,所述控制单元具体用于:在所述第一节流部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,若所述空调器系统制热运行,且所述第一检测单元检测到所述室外环境温度小于或等于第一设定温度值、所述压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第二端口与第二位置之间的管路上时,若空调器系统制热运行,室外环境温度小于或等于第一设定温度值、压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室内换热器之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,有效利用了冷凝后的冷媒热量,提高了空调器系统的整体换热量,增强了空调器系统的低温制热能力。
进一步地,所述控制单元还用于,在控制所述第一节流部件和所述第二节流部件开启之后,若所述第一检测单元检测到所述压缩机的排气过热度大于或等于第二设定过热度且持续第二预定时长,或检测到所述室外环境温度大于或等于第二设定温度值,则控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当检测到压缩机的排气过热度大于或等于第二设定过热度且持续第二预定时长,或检测到室外环境温度大于或等于第二设定温度值时,说明空调器系统并非是低温制热运行,此时可以控制第一节流部件和第二节流部件关闭,以使空调器系统按照正常方式运行。
根据本发明的一个实施例,所述控制单元具体用于:在所述第一节流 部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,若所述空调器系统制热运行,且所述判断单元判定所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第一端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第二端口与第二位置之间的管路上时,若空调器系统制热运行且处于小负荷运行状态,则可以控制第一节流部件和第二节流部件开启,并控制第二四通阀的第一端口与第四端口连通,使得经过第一四通阀之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制热运行时导致压缩机缺油损坏的问题。同时也能够提高空调器机组的整体换热量,增强了空调器系统的低温制热能力。
根据本发明的一个实施例,所述控制单元具体用于:在所述第一节流部件设置在所述第一通道的第一端口与所述第二四通阀的第四端口之间的管路上的情况下,若所述空调器系统制冷运行,且所述判断单元判定所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第一端口与所述第二四通阀的第四端口之间的管路上时,若空调器系统制冷运行且处于小负荷运行状态,则控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室外换热器之后的冷媒分为两个支路,一条支路经过室外换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接进入辅助换热器的第一通道,并经过第二四通阀室内换热器,辅助换热器内的两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避 免了空调器系统小负荷制冷运行时导致压缩机缺油损坏的问题。
根据本发明的一个实施例,所述判断单元还用于,在所述控制单元控制所述第一节流部件和所述第二节流部件开启之后,判断所述空调器系统是否退出所述小负荷运行状态;所述控制单元还用于,在所述空调器系统退出所述小负荷运行状态时,控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当判定空调器系统退出小负荷运行状态时,通过控制第一节流部件和第二节流部件关闭,使得空调器系统能够按照正常的运行方式进行工作。
根据本发明的一个实施例,所述判断单元具体用于:判断所述空调器系统中所有运行的室内机的能力需求的总和是否大于或等于第一值且持续第三预定时长;在所述所有运行的室内机的能力需求的总和大于或等于所述第一值且持续所述第三预定时长时,判定所述空调器系统退出所述小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否退出小负荷运行状态,譬如处于运行状态的室内机的台数较多时,可以确定空调器系统退出了小负荷运行状态。
根据本发明的一个实施例,所述判断单元具体还用于:判断所述空调器系统中所有运行的室内机的能力需求的总和是否小于或等于第二值且持续第四预定时长;在所述所有运行的室内机的能力需求的总和小于或等于所述第二值且持续所述第四预定时长时,判定所述空调器系统处于小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否处于小负荷运行状态,譬如处于运行状态的室内机的台数较少时,可以确定空调器系统处于小负荷运行状态。
根据本发明的一个实施例,所述空调器系统的控制装置还包括:第二检测单元,用于在所述控制单元控制所述第一节流部件和所述第二节流部件开启之后,检测所述辅助换热器的第二通道的第二端口和第一端口的温度值;第一调节单元,用于根据所述辅助换热器的第二通道的第二端口和 第一端口的温度值,调节所述第二节流部件的开度。
在该实施例中,由于辅助换热器的第二通道主要是进行冷媒的蒸发,而辅助换热器的第二通道的第二端口和第一端口的温度值反映了辅助换热器的蒸发侧的过热度,因此通过根据辅助换热器的第二通道的第二端口和第一端口的温度值来调节第二节流部件的开度,可以确保流经第二通道的冷媒量处于合理的范围内。
根据本发明的一个实施例,所述第一调节单元包括:第一计算单元,计算所述第二通道的第二端口和第一端口之间的温度差值;以及
执行单元,用于在所述温度差值上升至第一温度值的过程中,以及在所述温度差值由第二温度值下降的过程中,将所述第二节流部件的开度调小第一开度;在所述温度差值由所述第一温度值上升至第三温度值的过程中,以及在所述温度差值由第四温度值下降至所述第二温度值的过程中,控制所述第二节流部件的开度保持不变;在所述温度差值由所述第三温度值继续上升的过程中,以及在所述温度差值下降至所述第四温度值的过程中,将所述第二节流部件的开度调大第二开度。
在该实施例中,辅助换热器的第二通道的第二端口和第一端口之间的温度差值在上升过程中分为三个区间,即第一温度值以下、第一温度值~第三温度值、由第三温度值继续上升;辅助换热器的第二通道的第二端口和第一端口之间的温度差值在下降过程中分为三个区间,下降至第四温度值、第四温度值~第二温度值、第二温度值以下。由于辅助换热器的第二通道的第二端口和第一端口之间的温度差值越大,说明第二通道内的冷媒需求量越多,因此可以适当调大第二节流部件的开度;相反地,若辅助换热器的第二通道的第二端口和第一端口之间的温度差值越小,说明第二通道内的冷媒需求量越少,因此可以适当调小第二节流部件的开度。
根据本发明的一个实施例,所述空调器系统的控制装置还包括:第三检测单元,用于在所述控制单元控制所述第一节流部件和所述第二节流部件开启之后,检测所述空调器系统中当前作为冷凝器使用的换热器的温度,并检测所述辅助换热器的第一通道的管温;第二计算单元,用于计算所述空调器系统中当前作为冷凝器使用的换热器的温度和所述辅助换热器 的第一通道的管温的平均值;第二调节单元,用于根据所述辅助换热器的第一通道的管温和所述平均值,调节所述第一节流部件的开度。
在该实施例中,若空调器系统以制热模式运行,则处于运行状态的室内机的室内换热器作为冷凝器使用;若空调器系统以制冷模式运行,则室外机中的室外换热器是作为冷凝器使用。通过计算空调器系统中当前作为冷凝器使用的换热器的温度和辅助换热器的第一通道(作为辅助换热器的冷凝侧)的管温的平均值,并根据辅助换热器的第一通道的管温和计算得到的平均值来调节第一节流部件的开度,使得能够通过对第一节流部件的开度进行调整来间接控制辅助换热器的第一通道的管温,进而保证辅助换热器的第一通道的管温与空调器系统中所有冷凝器温度的平均值相适应,避免辅助换热器的第一通道的管温过低或过高。
根据本发明的一个实施例,所述第二调节单元具体用于:在所述辅助换热器的第一通道的管温小于所述平均值与第一预定值之差时,调大所述第一节流部件的开度;在所述辅助换热器的第一通道的管温大于或等于所述平均值与所述第一预定值之差,且小于或等于所述平均值与第二预定值之和时,控制所述第一节流部件的开度保持不变;在所述辅助换热器的第一通道的管温大于所述平均值与所述第二预定值之和时,调小所述第一节流部件的开度。
在该实施例中,当辅助换热器的第一通道的管温小于上述平均值与第一预定值之差时,说明辅助换热器的第一通道的管温较低,即冷媒量较少,因此可以调大第一节流部件的开度;相反地,当辅助换热器的第一通道的管温大于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温较高,即冷媒量较多,因此可以调小第一节流部件的开度;而在辅助换热器的第一通道的管温大于或等于上述平均值与第一预定值之差,且小于或等于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温处于正常范围内,因此可以控制第一节流部件的开度保持不变。
本发明的附加方面和优点将在下面的描述中部分给出,部分将从下面的描述中变得明显,或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解,其中:
图1示出了根据本发明的第一个实施例的空调器系统的结构示意图;
图2示出了根据本发明的第二个实施例的空调器系统的结构示意图;
图3示出了根据本发明的第三个实施例的空调器系统的结构示意图;
图4示出了根据本发明的第一个实施例的空调器系统的控制方法的流程示意图;
图5示出了根据本发明的第二个实施例的空调器系统的控制方法的流程示意图;
图6示出了根据本发明的实施例的对空调器系统中的节流部件的控制方式示意图;
图7示出了根据本发明的第三个实施例的空调器系统的控制方法的流程示意图;
图8示出了根据本发明的第四个实施例的空调器系统的结构示意图;
图9示出了根据本发明的第四个实施例的空调器系统的控制方法的流程示意图;
图10示出了根据本发明的第一个实施例的空调器系统的控制装置的示意框图;
图11示出了根据本发明的第二个实施例的空调器系统的控制装置的示意框图。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点,下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是,在不冲突的情况下,本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明,但是,本发明还可以采用其他不同于在此描述的其他方式来实施,因此,本发明的保护范围并不受下面公开的具体实施例的限制。
图1示出了根据本发明的第一个实施例的空调器系统的结构示意图。
如图1所示,根据本发明的第一个实施例的空调器系统,包括:至少包含压缩机1、第一四通阀21、室外换热器3和室内换热器4的制冷系统;第二四通阀22、辅助换热器5、第一节流部件6和第二节流部件7。
其中,第二四通阀22的第一端口连接在第一四通阀21和室内换热器4之间的管路上(图1中B1的位置),第二四通阀22的第二端口连接在室内换热器4和室外换热器3之间管路上的第一位置(图1中A1的位置);辅助换热器5具有第一通道和第二通道,其第一通道的第一端口与第二四通阀22的第四端口相连通,辅助换热器5的第一通道的第二端口连接在室内换热器4和室外换热器3之间管路上的第二位置(图1中A2的位置),辅助换热器5的第二通道的第一端口连接在室内换热器4和室外换热器3之间管路上的第三位置(图1中A3的位置),辅助换热器5的第二通道的第二端口连接在室外换热器3与压缩机1的回气口之间管路上的任意位置;第一节流部件6设置在辅助换热器5的第一通道的第二端口与所述第二位置之间的管路上;第二节流部件7设置在辅助换热器5的第二通道的第一端口与所述第三位置之间的管路上。其中,第二四通阀22的第三端口处于堵塞状态。
进一步地,所述制冷系统还包括第三节流部件8和气液分离器9;其中,第一四通阀21的四个端口分别与压缩机1的排气口、室外换热器3的第一端口、室内换热器4的第一端口和气液分离器9的入口相连通,室外换热器3的第二端口通过第三节流部件8与室内换热器4的第二端口相连通,气液分离器9的出口与压缩机1的回气口相连通。
进一步地,辅助换热器5的第二通道的第二端口的具体连接位置可以有如下几种:
1、如图1所示,辅助换热器5的第二通道的第二端口连接在气液分离器9的入口与第一四通阀21连通的管道上。
2、如图2所示,辅助换热器5的第二通道的第二端口连接在室外换热器3的第一端口与第一四通阀21连通的管道上。
3、辅助换热器5的第二通道的第二端口连接在气液分离器9的出口与压缩机1的回气口连通的管道上。
4、如图3所示,辅助换热器5的第二通道的第二端口连接至第三四通阀23的第一端口上,第三四通阀23的第二端口连接在室外换热器3的第一端口与第一四通阀21连通的管道上,第三四通阀23的第四端口连接在气液分离器9的入口与第一四通阀21连通的管道上。基于图3所示的结构,可以通过控制第三四通阀23的通电与断电来控制通过辅助换热器5的第二通道的冷媒是直接进入气液分离器9,还是通过第一四通阀21之后再进入气液分离器9。其中,第三四通阀23的第三端口处于堵塞状态。
进一步地,所述的空调器系统还包括:控制器(图1至图3中均未示出),连接至第一节流部件6、第二节流部件7和第二四通阀22,用于对第一节流部件6、第二节流部件7和第二四通阀22进行控制。
在本发明的一个实施例中,控制器具体用于:在空调器系统制热运行时,若检测到室外环境温度小于或等于第一设定温度值、压缩机1的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制第一节流部件6和第二节流部件7开启,并控制第二四通阀22的第二端口与第四端口连通。
通过在空调器系统制热运行,室外环境温度小于或等于第一设定温度值、压缩机1的排气过热度小于或等于第一设定过热度且持续第一预定时长时,控制第一节流部件6和第二节流部件7开启,并控制第二四通阀22的第二端口与第四端口连通,使得经过室内换热器4之后的冷媒分为两个支路,一条支路经过室内换热器4和第二节流部件7节流后进入辅助换热器5的第二通道,另一支路能够直接通过第二四通阀22进入辅助换热器5的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件7节流,因此在辅助换热器5内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,有效利用了冷凝后的冷媒热量,提高了空调器系统的整体换热量,增强了空调器系统的低温制热能力。
在本发明的另一个实施例中,控制器具体用于:在空调器系统制热运行时,若空调器系统处于小负荷运行状态,则控制第一节流部件6和第二节流部件7开启,并控制第二四通阀22的第一端口与第四端口连通。
通过在空调器系统制热运行且处于小负荷运行状态时,控制第一节流部件6和第二节流部件7开启,并控制第二四通阀22的第一端口与第四端口连通,使得经过第一四通阀21之后的冷媒分为两个支路,一条支路经过室内换热器4和第二节流部件7节流后进入辅助换热器5的第二通道,另一支路能够直接通过第二四通阀22进入辅助换热器5的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件7节流,因此在辅助换热器5内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制热运行时导致压缩机1缺油损坏的问题。同时也能够提高空调器机组的整体换热量,增强了空调器系统的低温制热能力。
基于图1至图3中任一图所示的空调器系统的结构,本发明提出的第一个实施例的控制方法如图4所示,具体包括:
步骤S40,获取空调器系统的运行模式。
步骤S42,判断空调器系统是否处于小负荷运行状态,或检测室外环境温度和压缩机的排气过热度。
在本发明的一个实施例中,步骤S42中判断空调器系统是否处于小负荷运行状态的步骤,具体包括:判断所述空调器系统中所有运行的室内机的能力需求的总和是否小于或等于第二值且持续第四预定时长;在所述所有运行的室内机的能力需求的总和小于或等于所述第二值且持续所述第四预定时长时,判定所述空调器系统处于小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否处于小负荷运行状态,譬如处于运行状态的室内机的台数较少时,可以确定空调器系统处于小负荷运行状态。
其中,压缩机的排气过热度=压缩机的排气温度-压缩机的饱和温度,而压缩机的饱和温度可以通过排气压力来进行确定。
步骤S44,根据空调器系统的运行模式,以及检测到的所述室外环境温度和所述排气过热度或空调器系统是否处于小负荷运行状态,对第一节流部件、第二节流部件和第二四通阀进行控制。
其中,步骤S44的控制包括如下两个实施例:
实施例一:
在本发明的一个实施例中,步骤S44中根据空调器系统的运行模式,以及检测到的所述室外环境温度和所述排气过热度,对所述第一节流部件、所述第二节流部件和所述第二四通阀进行控制的步骤,具体包括:
若所述空调器系统制热运行,且检测到所述室外环境温度小于或等于第一设定温度值、所述压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在空调器系统制热运行,室外环境温度小于或等于第一设定温度值、压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长时,控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室内换热器之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,有效利用了冷凝后的冷媒热量,提高了空调器系统的整体换热量,增强了空调器系统的低温制热能力。
进一步地,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:在检测到所述压缩机的排气过热度大于或等于第二设定过热度且持续第二预定时长,或检测到所述室外环境温度大于或等于第二设定温度值时,控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当检测到压缩机的排气过热度大于或等于第二设定过热度且持续第二预定时长,或检测到室外环境温度大于或等于第二设定温度值时,说明空调器系统并非是低温制热运行,此时可以控制第一节流部件和第二节流部件关闭,以使空调器系统按照正常方式运行。
实施例二:
根据本发明的一个实施例,步骤S44中根据所述空调器系统的运行模式,以及所述空调器系统是否处于小负荷运行状态,对所述第一节流部件和所述第二节流部件进行控制的步骤,具体包括:在空调器系统制热运行,且判定所述空调器系统处于小负荷运行状态时,控制所述第一节流部 件和所述第二节流部件开启,并控制所述第二四通阀的第一端口与第四端口连通。
在该实施例中,通过在空调器系统制热运行且处于小负荷运行状态时,控制第一节流部件和第二节流部件开启,并控制第二四通阀的第一端口与第四端口连通,使得经过第一四通阀之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制热运行时导致压缩机缺油损坏的问题。同时也能够提高空调器机组的整体换热量,增强了空调器系统的低温制热能力。
对于上述两个实施例,当控制所述第一节流部件和所述第二节流部件开启之后,还包括:判断所述空调器系统是否退出所述小负荷运行状态;在所述空调器系统退出所述小负荷运行状态时,控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当判定空调器系统退出小负荷运行状态时,通过控制第一节流部件和第二节流部件关闭,使得空调器系统能够按照正常的运行方式进行工作。
其中,在本发明的一个实施例中,判断所述空调器系统是否退出所述小负荷运行状态的步骤,具体包括:判断所述空调器系统中所有运行的室内机的能力需求的总和是否大于或等于第一值且持续第三预定时长;在所述所有运行的室内机的能力需求的总和大于或等于所述第一值且持续所述第三预定时长时,判定所述空调器系统退出所述小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否退出小负荷运行状态,譬如处于运行状态的室内机的台数较多时,可以确定空调器系统退出了小负荷运行状态。
进一步地,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:检测所述辅助换热器的第二通道的第二端口和第一端口的温度值;根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调 节所述第二节流部件的开度。
在该实施例中,由于辅助换热器的第二通道主要是进行冷媒的蒸发,而辅助换热器的第二通道的第二端口和第一端口的温度值反映了辅助换热器的蒸发侧的过热度,因此通过根据辅助换热器的第二通道的第二端口和第一端口的温度值来调节第二节流部件的开度,可以确保流经第二通道的冷媒量处于合理的范围内。
进一步地,根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调节所述第二节流部件的开度的步骤,具体包括:计算所述第二通道的第二端口和第一端口之间的温度差值;
在所述温度差值上升至第一温度值的过程中,以及在所述温度差值由第二温度值下降的过程中,将所述第二节流部件的开度调小第一开度;在所述温度差值由所述第一温度值上升至第三温度值的过程中,以及在所述温度差值由第四温度值下降至所述第二温度值的过程中,控制所述第二节流部件的开度保持不变;在所述温度差值由所述第三温度值继续上升的过程中,以及在所述温度差值下降至所述第四温度值的过程中,将所述第二节流部件的开度调大第二开度。
在该实施例中,辅助换热器的第二通道的第二端口和第一端口之间的温度差值在上升过程中分为三个区间,即第一温度值以下、第一温度值~第三温度值、由第三温度值继续上升;辅助换热器的第二通道的第二端口和第一端口之间的温度差值在下降过程中分为三个区间,下降至第四温度值、第四温度值~第二温度值、第二温度值以下。由于辅助换热器的第二通道的第二端口和第一端口之间的温度差值越大,说明第二通道内的冷媒需求量越多,因此可以适当调大第二节流部件的开度;相反地,若辅助换热器的第二通道的第二端口和第一端口之间的温度差值越小,说明第二通道内的冷媒需求量越少,因此可以适当调小第二节流部件的开度。
进一步地,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:检测所述空调器系统中处于运行状态的室内机的室内换热器温度,并检测所述辅助换热器的第一通道的管温;计算空调器系统中处于运行状态的室内机的室内换热器温度和所述辅助换热器的第一通道的管温的平均值;根据所述辅助换热器的第一通道的管温和所述平均值,调节所述 第一节流部件的开度。
在该实施例中,通过计算空调器系统中处于运行状态的室内机的室内换热器温度和辅助换热器的第一通道的管温的平均值,并根据辅助换热器的第一通道的管温和计算得到的平均值来调节第一节流部件的开度,使得能够通过对第一节流部件的开度进行调整来间接控制辅助换热器的第一通道的管温,进而保证辅助换热器的第一通道的管温与空调器系统中所有冷凝器温度的平均值相适应(空调器系统制热运行时,辅助换热器的第一通道和处于运行状态的室内机的室内换热器都用作冷凝器使用),避免辅助换热器的第一通道的管温过低或过高。
进一步地,根据所述辅助换热器的第一通道的管温和所述平均值,调节所述第一节流部件的开度的步骤,具体包括:在所述辅助换热器的第一通道的管温小于所述平均值与第一预定值之差时,调大所述第一节流部件的开度;在所述辅助换热器的第一通道的管温大于或等于所述平均值与所述第一预定值之差,且小于或等于所述平均值与第二预定值之和时,控制所述第一节流部件的开度保持不变;在所述辅助换热器的第一通道的管温大于所述平均值与所述第二预定值之和时,调小所述第一节流部件的开度。
在该实施例中,当辅助换热器的第一通道的管温小于上述平均值与第一预定值之差时,说明辅助换热器的第一通道的管温较低,即冷媒量较少,因此可以调大第一节流部件的开度;相反地,当辅助换热器的第一通道的管温大于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温较高,即冷媒量较多,因此可以调小第一节流部件的开度;而在辅助换热器的第一通道的管温大于或等于上述平均值与第一预定值之差,且小于或等于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温处于正常范围内,因此可以控制第一节流部件的开度保持不变。
基于图1至图3中任一图所示的空调器系统的结构,本发明提出的第二个实施例的控制方法如图5所示,具体包括:
步骤502,空调器系统以制热模式运行。
步骤504,判断室外环境温度Th是否小于或等于k,且压缩机的排气过热度Tp小于或等于m持续t1时间,若是,则执行步骤506;否则,执 行步骤512。其中,在本发明的一个实施例中,t1可以为10分钟。
步骤506,控制第二四通阀的第二端口与第四端口连通,第一节流部件和第二节流部件打开,且依据图6中所示的方式一和方式二分别调节第一节流部件和第二节流部件的开度。其中,第一节流部件和第二节流部件可以是电子膨胀阀。
具体地,依据图6中所示的方式一对第一节流器件的调节具体为:检测辅助换热器的第一通道(作为冷凝侧)的管温T,并检测空调器系统中当前正在运行的室内机中的室内换热器盘管(此时作为冷凝器使用)的中部温度,基于检测到的上述温度计算得到温度平均值T1,基于该温度平均值T1对第一节流器件的开度调节如下:
当T<T1-g1时,控制第一节流器件开f1步;
当T1-g1≤T≤T1+g2时,控制第一节流器件保持当前开度;
当T>T1+g2时,控制第一节流器件关f2步。
其中,f1与f2可以相同,也可以不同,在本发明的一个实施例中,f1=f2=40步;g1与g2可以相同,也可以不同,在本发明的一个实施例中,g1=g2=2℃。
依据图6中所示的方式二对第二节流器件的调节具体为:
计算辅助换热器的第二通道(作为蒸发侧)的过热度△T=T-T,即将第二通道的出口温度与入口温度之差作为第二通道的过热度,基于△T对第二节流器件的开度调节如下:
当△T升至h1的过程中,控制第二节流器件关e1步;
当△T由h1升至h2的过程中,控制第二节流器件保持当前开度;
当△T由h2继续上升的过程中,控制第二节流器件开e2步;
当△T下降至h3的过程中,控制第二节流器件开e2步;
当△T由h3下降至h4的过程中,控制第二节流器件保持当前开度;
当△T由h4继续下降的过程中,控制第二节流器件关e1步。
其中,e1与e2可以相同,也可以不同,在本发明的一个实施例中,e1=e2=16步。在本发明的一个实施例中,h1=2℃、h2=5℃、h3=4℃、h4=1℃。
上述方式一和方式二的调节过程可以周期性进行,比如可以每隔2分 钟调整一次。
步骤508,判断室外环境温度Th是否大于或等于n,或压缩机的排气过热度Tp大于或等于q持续t2时间,若是,则执行步骤510;否则,执行步骤506。其中,在本发明的一个实施例中,t2可以为10分钟。
步骤510,控制第一节流部件和第二节流部件关闭。
步骤512,空调器系统按照正常的逻辑运行。
以下结合图1对图5所示的控制方法做进一步说明:当空调器系统制热运行时,第一四通阀21上电,压缩机1排气经过第一四通阀21,进入室内换热器4,冷凝放热之后变成高压中温的冷媒,经过第三节流部件8节流后进入室外换热器3。此时控制第二四通阀的第二端口与第四端口相通(如控制第二四通阀为掉电状态),将经过室内换热器4之后的冷媒分为两个支路:未节流的高压中温状态的冷媒通过第二四通阀22进入辅助换热器5,在辅助换热器5中释放热量;另一支路的冷媒经过第二节流部件7节流后进入辅助换热器5,在辅助换热器5中吸收热量,获得较高的蒸发温度,与作为蒸发器的室外换热器3出来的冷媒混合进入压缩机1的回气侧,提高了系统整体的蒸发压力和蒸发温度,有效利用了冷凝后的冷媒热量,提高机组的整体换热量,增强低温制热的能力。
基于图1至图3中任一图所示的空调器系统的结构,本发明提出的第三个实施例的控制方法如图7所示,具体包括:
步骤702,空调器系统以制热模式运行。
步骤704,获取室内机的能力需求n。
步骤706,判断室内机的能力需求n是否小于或等于a%且持续b分钟,若是,则确定空调器系统处于小负荷运行状态,然后执行步骤708;否则,执行步骤714。
步骤708,在确定空调器系统处于小负荷运行状态时,控制第二四通阀的第一端口与第四端口相通,并控制第一节流部件和第二节流部件打开,并依据图6中所示的方式一和方式二分别调节第一节流部件和第二节流部件的开度。其中,第一节流部件和第二节流部件可以是电子膨胀阀。
上述方式一和方式二的调节过程可以周期性进行,比如可以每隔2分钟调整一次。
步骤710,判断室内机的能力需求n是否大于或等于c%且持续d分钟,若是,则确定空调器系统退出小负荷运行状态,然后执行步骤712;否则,继续执行步骤708。
步骤712,控制第一节流部件和第二节流部件关闭。
步骤714,空调器系统按照正常的逻辑运行。
以下结合图1对图7所示的控制方法做进一步说明:当检测到室内机的能力需求小于或等于a%持续b分钟时,则判定空调器系统为小负荷制热运行,此时开启辅助换热器5、第一节流部件6和第二节流部件7,并控制第二四通阀22的第一端口与第四端口相通(譬如控制第二四通阀22上电来使其第一端口与第四端口相通),第一节流部件6和第二节流部件7依据一定的逻辑进行相应调节。在执行上述控制之后,从第一四通阀21出来的高温高压的气态冷媒分为两路,一路直接进入室内换热器4冷凝放热,另一路经过第二四通阀22之后进入辅助换热器5,与经过第二节流部件7节流后的低温低压状态的冷媒换热。当检测到室内机的能力需求大于或等于c%持续d分钟时,判定空调器系统为非小负荷状态运行,此时控制第一节流部件6和第二节流部件7关闭(当然,也可以控制第二四通阀22掉电,或不对第二四通阀22控制),退出小负荷控制逻辑。可见,辅助换热器5可以调节空调器系统的负荷能力,保证压缩机1能够处于最佳的润滑状态。
此外,由于图5所示的控制逻辑和图7所示的控制逻辑中都需要对第二四通阀、第一节流部件和第二节流部件。因此当图5中的控制条件与图7中的控制条件都满足时,需要设置一个控制优先级。在本发明的一个优选实施例中,图7所示的控制优先级高于图5所示的控制优先级,即在图5中的控制条件与图7中的控制条件都满足时,执行图7所示的控制逻辑。
图8示出了根据本发明的第四个实施例的空调器系统的结构示意图。
如图8所示,根据本发明的第四个实施例的空调器系统,包括:至少包含压缩机1、第一四通阀21、室外换热器3和室内换热器4的制冷系统;第二四通阀22、辅助换热器5、第一节流部件6和第二节流部件7。
其中,第二四通阀22的第一端口连接在第一四通阀21和室内换热器 4之间的管路上(图8中B1的位置),第二四通阀22的第二端口连接在室内换热器4和室外换热器3之间管路上的第一位置(图8中A1的位置);辅助换热器5具有第一通道和第二通道,辅助换热器5的第一通道的第一端口与第二四通阀22的第四端口相连通,辅助换热器5的第一通道的第二端口连接在室内换热器4和室外换热器3之间管路上的第二位置(图8中A2的位置),辅助换热器5的第二通道的第一端口连接在室内换热器4和所述室外换热器3之间管路上的第三位置(图8中A3的位置),辅助换热器5的第二通道的第二端口连接在所述室外换热器3与所述压缩机1的回气口之间管路上的任意位置;第一节流部件6设置在辅助换热器5的第一通道的第一端口与第二四通阀22的第四端口之间的管路上;第二节流部件7设置在辅助换热器5的第二通道的第一端口与所述第三位置之间的管路上。
进一步地,所述制冷系统还包括第三节流部件8和气液分离器9;其中,第一四通阀21的四个端口分别与压缩机1的排气口、室外换热器3的第一端口、室内换热器4的第一端口和气液分离器9的入口相连通,室外换热器3的第二端口通过第三节流部件8与室内换热器4的第二端口相连通,气液分离器9的出口与压缩机1的回气口相连通。
进一步地,辅助换热器5的第二通道的第二端口的具体连接位置可以有如下几种:
1、如图8所示,辅助换热器5的第二通道的第二端口连接在气液分离器9的入口与第一四通阀21连通的管道上。
2、类似于图2所示的结构,辅助换热器5的第二通道的第二端口连接在室外换热器3的第一端口与第一四通阀21连通的管道上。
3、辅助换热器5的第二通道的第二端口连接在气液分离器9的出口与压缩机1的回气口连通的管道上。
4、类似于图3所示的结构,辅助换热器5的第二通道的第二端口连接至第三四通阀23的第一端口上,第三四通阀23的第二端口连接在室外换热器3的第一端口与第一四通阀21连通的管道上,第三四通阀23的第四端口连接在气液分离器9的入口与第一四通阀21连通的管道上。进而可以通过控制第三四通阀23的通电与断电来控制通过辅助换热器5的第 二通道的冷媒是直接进入气液分离器9,还是通过第一四通阀21之后再进入气液分离器9。
进一步地,空调器系统还包括:控制器(图8中未示出),连接至第一节流部件6、第二节流部件7和第二四通阀22,用于对第一节流部件6、第二节流部件7和第二四通阀22进行控制。
在本发明的一个实施例中,控制器具体用于:在空调器系统制冷运行,且空调器系统处于小负荷运行状态时,控制第一节流部件6和第二节流部件7开启,并控制第二四通阀22的第二端口与第四端口连通。
在该实施例中,通过在空调器系统制冷运行且处于小负荷运行状态时,控制第一节流部件6和第二节流部件7开启,并控制第二四通阀22的第二端口与第四端口连通,使得经过室外换热器3之后的冷媒分为两个支路,一条支路经过室外换热器3和第二节流部件7节流后进入辅助换热器5的第二通道,另一支路能够直接进入辅助换热器5的第一通道,并经过第二四通阀22进入室内换热器4,辅助换热器5内的两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件7节流,因此在辅助换热器5内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制冷运行时导致压缩机1缺油损坏的问题。
基于图8所示的空调器系统的结构,本发明提出的控制方法如图9所示,具体包括:
步骤S90,获取空调器系统的运行模式。
步骤S92,判断空调器系统是否处于小负荷运行状态。
在本发明的一个实施例中,步骤S92中判断空调器系统是否处于小负荷运行状态的步骤,具体包括:判断所述空调器系统中所有运行的室内机的能力需求的总和是否小于或等于第二值且持续第四预定时长;在所述所有运行的室内机的能力需求的总和小于或等于所述第二值且持续所述第四预定时长时,判定所述空调器系统处于小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否处于小负荷运行状态,譬如处于运行状态的室内机的台数较少时,可以确定空调器系统处于小负荷运行状态。
步骤S94,根据空调器系统的运行模式,以及空调器系统是否处于小负荷运行状态,对第一节流部件、第二节流部件和第二四通阀进行控制。
在本发明的一个实施例中,步骤S94具体为:在空调器系统制冷运行,且判定空调器系统处于小负荷运行状态时,控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第一端口与所述第二四通阀的第四端口之间的管路上时,若空调器系统制冷运行且处于小负荷运行状态,则控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室外换热器之后的冷媒分为两个支路,一条支路经过室外换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接进入辅助换热器的第一通道,并经过第二四通阀进入室内换热器,辅助换热器内的两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制冷运行时导致压缩机缺油损坏的问题。
在本发明的一个实施例中,当控制所述第一节流部件和所述第二节流部件开启之后,还包括:判断所述空调器系统是否退出所述小负荷运行状态;在所述空调器系统退出所述小负荷运行状态时,控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当判定空调器系统退出小负荷运行状态时,通过控制第一节流部件和第二节流部件关闭,使得空调器系统能够按照正常的运行方式进行工作。
其中,在本发明的一个实施例中,判断所述空调器系统是否退出所述小负荷运行状态的步骤,具体包括:判断所述空调器系统中所有运行的室内机的能力需求的总和是否大于或等于第一值且持续第三预定时长;在所述所有运行的室内机的能力需求的总和大于或等于所述第一值且持续所述第三预定时长时,判定所述空调器系统退出所述小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否退出小负荷运行状态,譬如处于运行状态的室内机的台数较多时,可以确定空调器系统退出了小负荷运行状态。
根据本发明的一个实施例,判断所述空调器系统是否处于小负荷运行状态的步骤,具体包括:判断所述空调器系统中所有运行的室内机的能力需求的总和是否小于或等于第二值且持续第四预定时长;在所述所有运行的室内机的能力需求的总和小于或等于所述第二值且持续所述第四预定时长时,判定所述空调器系统处于小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否处于小负荷运行状态,譬如处于运行状态的室内机的台数较少时,可以确定空调器系统处于小负荷运行状态。
进一步地,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:检测所述辅助换热器的第二通道的第二端口和第一端口的温度值;根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调节所述第二节流部件的开度。
在该实施例中,由于辅助换热器的第二通道主要是进行冷媒的蒸发,而辅助换热器的第二通道的第二端口和第一端口的温度值反映了辅助换热器的蒸发侧的过热度,因此通过根据辅助换热器的第二通道的第二端口和第一端口的温度值来调节第二节流部件的开度,可以确保流经第二通道的冷媒量处于合理的范围内。
进一步地,根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调节所述第二节流部件的开度的步骤,具体包括:计算所述第二通道的第二端口和第一端口之间的温度差值;
在所述温度差值上升至第一温度值的过程中,以及在所述温度差值由第二温度值下降的过程中,将所述第二节流部件的开度调小第一开度;在所述温度差值由所述第一温度值上升至第三温度值的过程中,以及在所述温度差值由第四温度值下降至所述第二温度值的过程中,控制所述第二节流部件的开度保持不变;在所述温度差值由所述第三温度值继续上升的过程中,以及在所述温度差值下降至所述第四温度值的过程中,将所述第二节流部件的开度调大第二开度。
在该实施例中,辅助换热器的第二通道的第二端口和第一端口之间的温度差值在上升过程中分为三个区间,即第一温度值以下、第一温度值~第三温度值、由第三温度值继续上升;辅助换热器的第二通道的第二端口 和第一端口之间的温度差值在下降过程中分为三个区间,下降至第四温度值、第四温度值~第二温度值、第二温度值以下。由于辅助换热器的第二通道的第二端口和第一端口之间的温度差值越大,说明第二通道内的冷媒需求量越多,因此可以适当调大第二节流部件的开度;相反地,若辅助换热器的第二通道的第二端口和第一端口之间的温度差值越小,说明第二通道内的冷媒需求量越少,因此可以适当调小第二节流部件的开度。
进一步地,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:检测所述空调器系统中室外换热器的温度,并检测所述辅助换热器的第一通道的管温;计算所述室外换热器的温度和所述辅助换热器的第一通道的管温的平均值;根据所述辅助换热器的第一通道的管温和所述平均值,调节所述第一节流部件的开度。
在该实施例中,通过计算空调器系统中的室外换热器的温度和辅助换热器的第一通道的管温的平均值,并根据辅助换热器的第一通道的管温和计算得到的平均值来调节第一节流部件的开度,使得能够通过对第一节流部件的开度进行调整来间接控制辅助换热器的第一通道的管温,进而保证辅助换热器的第一通道的管温与空调器系统中所有冷凝器温度的平均值相适应(空调器系统制冷运行时,辅助换热器的第一通道和室外换热器都用作冷凝器使用),避免辅助换热器的第一通道的管温过低或过高。
进一步地,根据所述辅助换热器的第一通道的管温和所述平均值,调节所述第一节流部件的开度的步骤,具体包括:在所述辅助换热器的第一通道的管温小于所述平均值与第一预定值之差时,调大所述第一节流部件的开度;在所述辅助换热器的第一通道的管温大于或等于所述平均值与所述第一预定值之差,且小于或等于所述平均值与第二预定值之和时,控制所述第一节流部件的开度保持不变;在所述辅助换热器的第一通道的管温大于所述平均值与所述第二预定值之和时,调小所述第一节流部件的开度。
在该实施例中,当辅助换热器的第一通道的管温小于上述平均值与第一预定值之差时,说明辅助换热器的第一通道的管温较低,即冷媒量较少,因此可以调大第一节流部件的开度;相反地,当辅助换热器的第一通道的管温大于上述平均值与第二预定值之和时,说明辅助换热器的第一通 道的管温较高,即冷媒量较多,因此可以调小第一节流部件的开度;而在辅助换热器的第一通道的管温大于或等于上述平均值与第一预定值之差,且小于或等于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温处于正常范围内,因此可以控制第一节流部件的开度保持不变。
此外,本发明针对上述空调器系统的结构,还分别提出了相应的控制装置。
具体地,基于图1至图3中任一图所示的空调器系统的结构,如图10所示,根据本发明的第一个实施例的空调器系统的控制装置100,包括:获取单元102,判断单元104或第一检测单元106,控制单元108。
其中,获取单元102用于获取所述空调器系统的运行模式;判断单元104用于判断所述空调器系统是否处于小负荷运行状态;第一检测单元106用于检测室外环境温度和所述压缩机的排气过热度;控制单元108用于根据所述空调器系统的运行模式,以及所述第一检测单元106检测到的所述室外环境温度和所述排气过热度或所述空调器系统是否处于小负荷运行状态,对所述第一节流部件、所述第二节流部件和所述第二四通阀进行控制。
控制单元108的控制操作具体有如下两个实施例:
实施例一:
在本发明的一个实施例中,控制单元108具体用于:在空调器系统制热运行,且第一检测单元106检测到室外环境温度小于或等于第一设定温度值、压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长时,控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在空调器系统制热运行,室外环境温度小于或等于第一设定温度值、压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长时,控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室内换热器之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节 流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,有效利用了冷凝后的冷媒热量,提高了空调器系统的整体换热量,增强了空调器系统的低温制热能力。
进一步地,所述控制单元108还用于,在控制所述第一节流部件和所述第二节流部件开启之后,若所述第一检测单元106检测到压缩机的排气过热度大于或等于第二设定过热度且持续第二预定时长,或检测到所述室外环境温度大于或等于第二设定温度值,则控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当检测到压缩机的排气过热度大于或等于第二设定过热度且持续第二预定时长,或检测到室外环境温度大于或等于第二设定温度值时,说明空调器系统并非是低温制热运行,此时可以控制第一节流部件和第二节流部件关闭,以使空调器系统按照正常方式运行。
实施例二:
在本发明的一个实施例中,控制单元108具体用于:在空调器系统制热运行,且判断单元104判定空调器系统处于小负荷运行状态时,控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第一端口与第四端口连通。
在该实施例中,通过在空调器系统制热运行且处于小负荷运行状态时,控制第一节流部件和第二节流部件开启,并控制第二四通阀的第一端口与第四端口连通,使得经过第一四通阀之后的冷媒分为两个支路,一条支路经过室内换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接通过第二四通阀进入辅助换热器的第一通道,两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制热运行时导致压缩机缺油损坏的问题。同时也能够提高空调器机组的整体换热量,增强了空调器系统的低温制热能力。
进一步地,判断单元104还用于,在控制单元108控制所述第一节流部件和所述第二节流部件开启之后,判断所述空调器系统是否退出所述小负荷运行状态;所述控制单元108还用于,在所述空调器系统退出所述小 负荷运行状态时,控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当判定空调器系统退出小负荷运行状态时,通过控制第一节流部件和第二节流部件关闭,使得空调器系统能够按照正常的运行方式进行工作。
进一步地,判断单元104具体用于:判断所述空调器系统中所有运行的室内机的能力需求的总和是否大于或等于第一值且持续第三预定时长;在所述所有运行的室内机的能力需求的总和大于或等于所述第一值且持续所述第三预定时长时,判定所述空调器系统退出所述小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否退出小负荷运行状态,譬如处于运行状态的室内机的台数较多时,可以确定空调器系统退出了小负荷运行状态。
进一步地,判断单元104具体还用于:判断所述空调器系统中所有运行的室内机的能力需求的总和是否小于或等于第二值且持续第四预定时长;在所述所有运行的室内机的能力需求的总和小于或等于所述第二值且持续所述第四预定时长时,判定所述空调器系统处于小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否处于小负荷运行状态,譬如处于运行状态的室内机的台数较少时,可以确定空调器系统处于小负荷运行状态。
在上述两个实施例中任一实施例的基础上,空调器系统的控制装置100还包括:第二检测单元110和第一调节单元112。
其中,第二检测单元110用于在控制单元108控制所述第一节流部件和所述第二节流部件开启之后,检测所述辅助换热器的第二通道的第二端口和第一端口的温度值;第一调节单元112用于根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调节所述第二节流部件的开度。
在该实施例中,由于辅助换热器的第二通道主要是进行冷媒的蒸发,而辅助换热器的第二通道的第二端口和第一端口的温度值反映了辅助换热器的蒸发侧的过热度,因此通过根据辅助换热器的第二通道的第二端口和第一端口的温度值来调节第二节流部件的开度,可以确保流经第二通道的冷媒量处于合理的范围内。
根据本发明的一个实施例,所述第一调节单元112包括:第一计算单 元1122执行单元1124。
其中,第一计算单元1122用于计算所述第二通道的第二端口和第一端口之间的温度差值。
执行单元1124用于在所述温度差值上升至第一温度值的过程中,以及在所述温度差值由第二温度值下降的过程中,将所述第二节流部件的开度调小第一开度;在所述温度差值由所述第一温度值上升至第三温度值的过程中,以及在所述温度差值由第四温度值下降至所述第二温度值的过程中,控制所述第二节流部件的开度保持不变;在所述温度差值由所述第三温度值继续上升的过程中,以及在所述温度差值下降至所述第四温度值的过程中,将所述第二节流部件的开度调大第二开度。
在该实施例中,辅助换热器的第二通道的第二端口和第一端口之间的温度差值在上升过程中分为三个区间,即第一温度值以下、第一温度值~第三温度值、由第三温度值继续上升;辅助换热器的第二通道的第二端口和第一端口之间的温度差值在下降过程中分为三个区间,下降至第四温度值、第四温度值~第二温度值、第二温度值以下。由于辅助换热器的第二通道的第二端口和第一端口之间的温度差值越大,说明第二通道内的冷媒需求量越多,因此可以适当调大第二节流部件的开度;相反地,若辅助换热器的第二通道的第二端口和第一端口之间的温度差值越小,说明第二通道内的冷媒需求量越少,因此可以适当调小第二节流部件的开度。
在本发明的一个实施例中,空调器系统的控制装置100还包括:第三检测单元114、第二计算单元116和第二调节单元118。
其中,第三检测单元114用于在控制单元108控制所述第一节流部件和所述第二节流部件开启之后,检测所述空调器系统中处于运行状态的室内机的室内换热器温度,并检测所述辅助换热器的第一通道的管温;第二计算单元116用于计算空调器系统中处于运行状态的室内机的室内换热器温度和所述辅助换热器的第一通道的管温的平均值;第二调节单元118用于根据所述辅助换热器的第一通道的管温和所述平均值,调节所述第一节流部件的开度。
在该实施例中,通过计算空调器系统中处于运行状态的室内机的室内换热器温度和辅助换热器的第一通道的管温的平均值,并根据辅助换热器 的第一通道的管温和计算得到的平均值来调节第一节流部件的开度,使得能够通过对第一节流部件的开度进行调整来间接控制辅助换热器的第一通道的管温,进而保证辅助换热器的第一通道的管温与空调器系统中所有冷凝器温度的平均值相适应(空调器系统制热运行时,辅助换热器的第一通道和处于运行状态的室内机的室内换热器都用作冷凝器使用),避免辅助换热器的第一通道的管温过低或过高。
根据本发明的一个实施例,所述第二调节单元118具体用于:在所述辅助换热器的第一通道的管温小于所述平均值与第一预定值之差时,调大所述第一节流部件的开度;在所述辅助换热器的第一通道的管温大于或等于所述平均值与所述第一预定值之差,且小于或等于所述平均值与第二预定值之和时,控制所述第一节流部件的开度保持不变;在所述辅助换热器的第一通道的管温大于所述平均值与所述第二预定值之和时,调小所述第一节流部件的开度。
在该实施例中,当辅助换热器的第一通道的管温小于上述平均值与第一预定值之差时,说明辅助换热器的第一通道的管温较低,即冷媒量较少,因此可以调大第一节流部件的开度;相反地,当辅助换热器的第一通道的管温大于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温较高,即冷媒量较多,因此可以调小第一节流部件的开度;而在辅助换热器的第一通道的管温大于或等于上述平均值与第一预定值之差,且小于或等于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温处于正常范围内,因此可以控制第一节流部件的开度保持不变。
具体地,基于图8所示的空调器系统的结构,如图11所示,根据本发明的第二个实施例的空调器系统的控制装置200,包括:获取单元202、判断单元204和控制单元206。
其中,获取单元202用于获取空调器系统的运行模式;判断单元204用于判断空调器系统是否处于小负荷运行状态;控制单元206用于根据所述空调器系统的运行模式,以及空调器系统是否处于小负荷运行状态,对第一节流部件、第二节流部件和第二四通阀进行控制。
其中,控制单元206具体用于:在空调器系统制冷运行,且判断单元204判定所述空调器系统处于小负荷运行状态时,控制所述第一节流部件 和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
在该实施例中,通过在第一节流部件设置在第一通道的第一端口与所述第二四通阀的第四端口之间的管路上时,若空调器系统制冷运行且处于小负荷运行状态,则控制第一节流部件和第二节流部件开启,并控制第二四通阀的第二端口与第四端口连通,使得经过室外换热器之后的冷媒分为两个支路,一条支路经过室外换热器和第二节流部件节流后进入辅助换热器的第二通道,另一支路能够直接进入辅助换热器的第一通道,并经过第二四通阀进入室内换热器,辅助换热器内的两路冷媒进行换热,即第二通道内的冷媒由于经过第二节流部件节流,因此在辅助换热器内蒸发,第一通道内的冷媒进行冷凝,进而能够提高空调器系统的蒸发压力和蒸发温度,避免了空调器系统小负荷制冷运行时导致压缩机缺油损坏的问题。
进一步地,判断单元204还用于,在控制单元206控制所述第一节流部件和所述第二节流部件开启之后,判断所述空调器系统是否退出所述小负荷运行状态;所述控制单元206还用于,在所述空调器系统退出所述小负荷运行状态时,控制所述第一节流部件和所述第二节流部件关闭。
在该实施例中,当判定空调器系统退出小负荷运行状态时,通过控制第一节流部件和第二节流部件关闭,使得空调器系统能够按照正常的运行方式进行工作。
进一步地,所述判断单元204具体用于:判断所述空调器系统中所有运行的室内机的能力需求的总和是否大于或等于第一值且持续第三预定时长;在所述所有运行的室内机的能力需求的总和大于或等于所述第一值且持续所述第三预定时长时,判定所述空调器系统退出所述小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否退出小负荷运行状态,譬如处于运行状态的室内机的台数较多时,可以确定空调器系统退出了小负荷运行状态。
进一步地,所述判断单元204具体还用于:判断所述空调器系统中所有运行的室内机的能力需求的总和是否小于或等于第二值且持续第四预定时长;在所述所有运行的室内机的能力需求的总和小于或等于所述第二值 且持续所述第四预定时长时,判定所述空调器系统处于小负荷运行状态。
在本发明的另一个实施例中,也可以根据处于运行状态的室内机的台数来确定空调器系统是否处于小负荷运行状态,譬如处于运行状态的室内机的台数较少时,可以确定空调器系统处于小负荷运行状态。
进一步地,空调器系统的控制装置200还包括:第二检测单元208和第一调节单元210。
其中,第二检测单元208用于在控制单元206控制所述第一节流部件和所述第二节流部件开启之后,检测所述辅助换热器的第二通道的第二端口和第一端口的温度值;第一调节单元210用于根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调节所述第二节流部件的开度。
在该实施例中,由于辅助换热器的第二通道主要是进行冷媒的蒸发,而辅助换热器的第二通道的第二端口和第一端口的温度值反映了辅助换热器的蒸发侧的过热度,因此通过根据辅助换热器的第二通道的第二端口和第一端口的温度值来调节第二节流部件的开度,可以确保流经第二通道的冷媒量处于合理的范围内。
进一步地,第一调节单元210包括:第一计算单元2102和执行单元2104。
其中,第一计算单元2102,计算所述第二通道的第二端口和第一端口之间的温度差值。
执行单元2104,用于在所述温度差值升至第一温度值的过程中,以及在所述温度差值由第二温度值下降的过程中,将所述第二节流部件的开度调小第一开度;在所述温度差值由所述第一温度值上升至第三温度值的过程中,以及在所述温度差值由第四温度值下降至所述第二温度值的过程中,控制所述第二节流部件的开度保持不变;在所述温度差值由所述第三温度值继续上升的过程中,以及在所述温度差值下降至所述第四温度值的过程中,将所述第二节流部件的开度调大第二开度。
在该实施例中,辅助换热器的第二通道的第二端口和第一端口之间的温度差值在上升过程中分为三个区间,即第一温度值以下、第一温度值~第三温度值、由第三温度值继续上升;辅助换热器的第二通道的第二端口和第一端口之间的温度差值在下降过程中分为三个区间,下降至第四温度 值、第四温度值~第二温度值、第二温度值以下。由于辅助换热器的第二通道的第二端口和第一端口之间的温度差值越大,说明第二通道内的冷媒需求量越多,因此可以适当调大第二节流部件的开度;相反地,若辅助换热器的第二通道的第二端口和第一端口之间的温度差值越小,说明第二通道内的冷媒需求量越少,因此可以适当调小第二节流部件的开度。
进一步地,空调器系统的控制装置200还包括:第三检测单元212,用于在所述控制单元206控制所述第一节流部件和所述第二节流部件开启之后,检测所述空调器系统中室外换热器的温度,并检测所述辅助换热器的第一通道的管温;第二计算单元214,用于计算所述室外换热器的温度和所述辅助换热器的第一通道的管温的平均值;第二调节单元216,用于根据所述辅助换热器的第一通道的管温和所述平均值,调节所述第一节流部件的开度。
在该实施例中,通过计算空调器系统中的室外换热器的温度和辅助换热器的第一通道的管温的平均值,并根据辅助换热器的第一通道的管温和计算得到的平均值来调节第一节流部件的开度,使得能够通过对第一节流部件的开度进行调整来间接控制辅助换热器的第一通道的管温,进而保证辅助换热器的第一通道的管温与空调器系统中所有冷凝器温度的平均值相适应(空调器系统制冷运行时,辅助换热器的第一通道和室外换热器都用作冷凝器使用),避免辅助换热器的第一通道的管温过低或过高。
进一步地,所述第二调节单元216具体用于:在所述辅助换热器的第一通道的管温小于所述平均值与第一预定值之差时,调大所述第一节流部件的开度;在所述辅助换热器的第一通道的管温大于或等于所述平均值与所述第一预定值之差,且小于或等于所述平均值与第二预定值之和时,控制所述第一节流部件的开度保持不变;在所述辅助换热器的第一通道的管温大于所述平均值与所述第二预定值之和时,调小所述第一节流部件的开度。
在该实施例中,当辅助换热器的第一通道的管温小于上述平均值与第一预定值之差时,说明辅助换热器的第一通道的管温较低,即冷媒量较少,因此可以调大第一节流部件的开度;相反地,当辅助换热器的第一通道的管温大于上述平均值与第二预定值之和时,说明辅助换热器的第一通 道的管温较高,即冷媒量较多,因此可以调小第一节流部件的开度;而在辅助换热器的第一通道的管温大于或等于上述平均值与第一预定值之差,且小于或等于上述平均值与第二预定值之和时,说明辅助换热器的第一通道的管温处于正常范围内,因此可以控制第一节流部件的开度保持不变。
其中,本发明上述的空调器系统可以是多联机空调器系统,也可以是普通的家用空调器。
以上结合附图详细说明了本发明的技术方案,本发明提出了一种新的空调器系统及其控制方法,有效避免空调器系统长时间小负荷运行导致压缩机缺油损坏的问题,同时也能够增强空调器系统的低温制热能力。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (18)

  1. 一种空调器系统,其特征在于,包括:
    至少包含压缩机、第一四通阀、室外换热器和室内换热器的制冷系统;
    第二四通阀,所述第二四通阀的第一端口连接在所述第一四通阀和所述室内换热器之间的管路上,所述第二四通阀的第二端口连接在所述室内换热器和所述室外换热器之间管路上的第一位置;
    辅助换热器,具有第一通道和第二通道,所述第一通道的第一端口与所述第二四通阀的第四端口相连通,所述第一通道的第二端口连接在所述室内换热器和所述室外换热器之间管路上的第二位置,所述第二通道的第一端口连接在所述室内换热器和所述室外换热器之间管路上的第三位置,所述第二通道的第二端口连接在所述室外换热器与所述压缩机的回气口之间管路上的任意位置;
    第一节流部件,设置在所述第一通道的第二端口与所述第二位置之间的管路上,或设置在所述第一通道的第一端口与所述第二四通阀的第四端口之间的管路上;
    第二节流部件,设置在所述第二通道的第一端口与所述第三位置之间的管路上。
  2. 根据权利要求1所述的空调器系统,其特征在于,所述制冷系统还包括第三节流部件和气液分离器;
    其中,所述第一四通阀的四个端口分别与所述压缩机的排气口、所述室外换热器的第一端口、所述室内换热器的第一端口和所述气液分离器的入口相连通,所述室外换热器的第二端口通过所述第三节流部件与所述室内换热器的第二端口相连通,所述气液分离器的出口与所述压缩机的回气口相连通;
    所述第二通道的第二端口连接在所述室外换热器的第一端口与所述第一四通阀连通的管道上、所述气液分离器的入口与所述第一四通阀连通的管道上或所述气液分离器的出口与所述压缩机的回气口连通的管道上。
  3. 根据权利要求1或2所述的空调器系统,其特征在于,还包括:
    控制器,连接至所述第一节流部件、所述第二节流部件和所述第二四通阀,用于对所述第一节流部件、所述第二节流部件和所述第二四通阀进行控制。
  4. 根据权利要求3所述的空调器系统,其特征在于,所述控制器具体用于:
    在所述第一节流部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,若所述空调器系统制热运行,并检测到所述室外环境温度小于或等于第一设定温度值、所述压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
  5. 根据权利要求3所述的空调器系统,其特征在于,所述控制器具体用于:
    在所述第一节流部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,若所述空调器系统制热运行,且所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第一端口与第四端口连通。
  6. 根据权利要求3所述的空调器系统,其特征在于,所述控制器具体用于:
    在所述第一节流部件设置在所述第一通道的第一端口与所述第二四通阀的第四端口之间的管路上的情况下,若所述空调器系统制冷运行,且所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
  7. 一种空调器系统的控制方法,用于对如权利要求1至6中任一项所述的空调器系统进行控制,其特征在于,包括:
    获取所述空调器系统的运行模式;
    判断所述空调器系统是否处于小负荷运行状态,或检测室外环境温度和所述压缩机的排气过热度;
    根据所述空调器系统的运行模式,以及检测到的所述室外环境温度和 所述排气过热度或所述空调器系统是否处于小负荷运行状态,对所述第一节流部件、所述第二节流部件和所述第二四通阀进行控制。
  8. 根据权利要求7所述的空调器系统的控制方法,其特征在于,根据所述空调器系统的运行模式,以及检测到的所述室外环境温度和所述排气过热度,对所述第一节流部件、所述第二节流部件和所述第二四通阀进行控制的步骤,具体包括:
    在所述第一节流部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,
    若所述空调器系统制热运行,且检测到所述室外环境温度小于或等于第一设定温度值、所述压缩机的排气过热度小于或等于第一设定过热度且持续第一预定时长,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
  9. 根据权利要求8所述的空调器系统的控制方法,其特征在于,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:
    在检测到所述压缩机的排气过热度大于或等于第二设定过热度且持续第二预定时长,或检测到所述室外环境温度大于或等于第二设定温度值时,控制所述第一节流部件和所述第二节流部件关闭。
  10. 根据权利要求7所述的空调器系统的控制方法,其特征在于,根据所述空调器系统的运行模式,以及所述空调器系统是否处于小负荷运行状态,对所述第一节流部件和所述第二节流部件进行控制的步骤,具体包括:
    在所述第一节流部件设置在所述第一通道的第二端口与所述第二位置之间的管路上的情况下,
    若所述空调器系统制热运行,且判定所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第一端口与第四端口连通。
  11. 根据权利要求7所述的空调器系统的控制方法,其特征在于,根据所述空调器系统的运行模式,以及所述空调器系统是否处于小负荷运行状态,对所述第一节流部件和所述第二节流部件进行控制的步骤,具体包 括:
    在所述第一节流部件设置在所述第一通道的第一端口与所述第二四通阀的第四端口之间的管路上的情况下,
    若所述空调器系统制冷运行,且判定所述空调器系统处于小负荷运行状态,则控制所述第一节流部件和所述第二节流部件开启,并控制所述第二四通阀的第二端口与第四端口连通。
  12. 根据权利要求10或11所述的空调器系统的控制方法,其特征在于,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:
    判断所述空调器系统是否退出所述小负荷运行状态;
    在所述空调器系统退出所述小负荷运行状态时,控制所述第一节流部件和所述第二节流部件关闭。
  13. 根据权利要求12所述的空调器系统的控制方法,其特征在于,判断所述空调器系统是否退出所述小负荷运行状态的步骤,具体包括:
    判断所述空调器系统中所有运行的室内机的能力需求的总和是否大于或等于第一值且持续第三预定时长;
    在所述所有运行的室内机的能力需求的总和大于或等于所述第一值且持续所述第三预定时长时,判定所述空调器系统退出所述小负荷运行状态。
  14. 根据权利要求7至11中任一项所述的空调器系统的控制方法,其特征在于,判断所述空调器系统是否处于小负荷运行状态的步骤,具体包括:
    判断所述空调器系统中所有运行的室内机的能力需求的总和是否小于或等于第二值且持续第四预定时长;
    在所述所有运行的室内机的能力需求的总和小于或等于所述第二值且持续所述第四预定时长时,判定所述空调器系统处于小负荷运行状态。
  15. 根据权利要求8至11中任一项所述的空调器系统的控制方法,其特征在于,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:
    检测所述辅助换热器的第二通道的第二端口和第一端口的温度值;
    根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调节所述第二节流部件的开度。
  16. 根据权利要求15所述的空调器系统的控制方法,其特征在于,根据所述辅助换热器的第二通道的第二端口和第一端口的温度值,调节所述第二节流部件的开度的步骤,具体包括:
    计算所述第二通道的第二端口和第一端口之间的温度差值;
    在所述温度差值上升至第一温度值的过程中,以及在所述温度差值由第二温度值下降的过程中,将所述第二节流部件的开度调小第一开度;
    在所述温度差值由所述第一温度值上升至第三温度值的过程中,以及在所述温度差值由第四温度值下降至所述第二温度值的过程中,控制所述第二节流部件的开度保持不变;
    在所述温度差值由所述第三温度值继续上升的过程中,以及在所述温度差值下降至所述第四温度值的过程中,将所述第二节流部件的开度调大第二开度。
  17. 根据权利要求8至11中任一项所述的空调器系统的控制方法,其特征在于,在控制所述第一节流部件和所述第二节流部件开启之后,还包括:
    检测所述空调器系统中当前作为冷凝器使用的换热器的温度,并检测所述辅助换热器的第一通道的管温;
    计算所述空调器系统中当前作为冷凝器使用的换热器的温度和所述辅助换热器的第一通道的管温的平均值;
    根据所述辅助换热器的第一通道的管温和所述平均值,调节所述第一节流部件的开度。
  18. 根据权利要求17所述的空调器系统的控制方法,其特征在于,根据所述辅助换热器的第一通道的管温和所述平均值,调节所述第一节流部件的开度的步骤,具体包括:
    在所述辅助换热器的第一通道的管温小于所述平均值与第一预定值之差时,调大所述第一节流部件的开度;
    在所述辅助换热器的第一通道的管温大于或等于所述平均值与所述第 一预定值之差,且小于或等于所述平均值与第二预定值之和时,控制所述第一节流部件的开度保持不变;
    在所述辅助换热器的第一通道的管温大于所述平均值与所述第二预定值之和时,调小所述第一节流部件的开度。
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