WO2017206679A1 - 空调器及其模式切换控制方法 - Google Patents

空调器及其模式切换控制方法 Download PDF

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Publication number
WO2017206679A1
WO2017206679A1 PCT/CN2017/083655 CN2017083655W WO2017206679A1 WO 2017206679 A1 WO2017206679 A1 WO 2017206679A1 CN 2017083655 W CN2017083655 W CN 2017083655W WO 2017206679 A1 WO2017206679 A1 WO 2017206679A1
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Prior art keywords
compressor
indoor unit
outlet superheat
preset value
air conditioner
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PCT/CN2017/083655
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English (en)
French (fr)
Inventor
李元阳
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 EP17805624.8A priority Critical patent/EP3404335B1/en
Publication of WO2017206679A1 publication Critical patent/WO2017206679A1/zh
Priority to US16/169,820 priority patent/US10684039B2/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • F24F1/10—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/21—Refrigerant outlet evaporator temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1933—Suction pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2113—Temperatures of a suction accumulator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor

Definitions

  • the invention relates to the technical field of air conditioners, and in particular to an air conditioner and a mode switching control method thereof.
  • the indoor and outdoor heat exchangers in the heating mode and the cooling mode function in the opposite direction.
  • the air conditioning system when the air conditioning system is operating in the heating mode, the low pressure side of the outdoor unit is used as an evaporator, and the high pressure side of the indoor unit is used as a condenser; when the air conditioning system is operating in a cooling mode, the high side of the outdoor unit is used as a condenser It is used while the low pressure side of the indoor unit is used as an evaporator.
  • the refrigerant In the cooling mode, the refrigerant is condensed in the outdoor condenser, and in the heating mode, the refrigerant is condensed in the indoor condenser.
  • the size of the condenser determines the flow of liquid refrigerant that the system can carry. Since the system requires less refrigerant flow in the heating mode, the system requires a large amount of refrigerant flow in the cooling mode. However, in a system, only a fixed flow of refrigerant can be charged. Therefore, by configuring the liquid storage tank, The refrigerant that is not needed in the hot mode is stored.
  • the air conditioning system when the air conditioning system is cooled and shut down, the high pressure of the outdoor unit is high, the pressure of the liquid storage tank is relatively low, and the refrigerant of the system is automatically transferred from the outdoor condenser to the liquid storage tank.
  • the frequency of the compressor when the air conditioning system is cooled and returned to the oil, the frequency of the compressor is high, the opening of the throttle element of the indoor unit is large, the refrigerant will carry the oil back to the outdoor unit at a high speed, and a large amount of refrigerant will return to the liquid storage tank.
  • an object of the present invention is to provide a mode switching control method for an air conditioner, which improves the throttling effect by controlling the opening and down adjustment of the throttle element when the indoor unit is switched to the cooling mode.
  • the lower pressure is lower, the heat exchange temperature difference and the heat exchange refrigerant flow rate are increased, so that the indoor unit achieves better refrigeration capacity.
  • Another object of the present invention is to provide a non-transitory computer readable storage medium.
  • Still another object of the present invention is to provide an air conditioner.
  • an embodiment of the present invention provides a mode switching control method for an air conditioner, the air conditioner including an outdoor unit and an indoor unit, the outdoor unit including a compressor, and one end of the outdoor unit passes through a section
  • the flow element is connected to one end of the indoor unit, and the other end of the indoor unit is connected to the other end of the outdoor unit through a liquid storage tank
  • the method comprising the following steps: when the indoor unit is switched to the cooling mode, Obtaining the outlet superheat of the liquid storage tank, And determining whether the outlet superheat degree is less than a first preset value; if the outlet superheat degree is less than the first preset value, performing an opening degree reduction control on the throttling element until the outlet superheat degree
  • the second preset value is greater than the second preset value, wherein the second preset value is greater than the first preset value.
  • the outlet superheat degree of the liquid storage tank is obtained, and it is determined whether the outlet superheat degree is less than the first preset value, if the outlet superheat degree is less than The first preset value is used to control the opening of the throttle element until the outlet superheat is greater than the second preset value, thereby improving the throttling effect by controlling the opening of the throttle element to obtain a more
  • the low low pressure increases the heat exchange temperature difference and the heat exchange refrigerant flow rate, so that the indoor unit achieves better refrigeration capacity.
  • the saturation temperature corresponding to the target recirculation pressure of the compressor is further adjusted according to the outlet superheat degree, and according to The adjusted saturation temperature controls the compressor.
  • the saturation temperature corresponding to the target return gas pressure of the compressor is adjusted by the following formula:
  • Tesm2 MAX(Tesm1-(A-SSH)/A*4,B),
  • Tesm2 is a saturation temperature corresponding to a target return air pressure of the compressor
  • Tesm1 is a saturation temperature corresponding to a target return air pressure of the compressor before adjustment
  • A is the first preset value
  • SSH is the outlet superheat of the liquid storage tank
  • B is the saturation temperature corresponding to the minimum target exhaust pressure of the compressor.
  • the outlet superheat of the liquid storage tank is obtained by the following formula:
  • SSH is the outlet superheat of the liquid storage tank
  • Ts is the return air temperature of the compressor
  • Te is the saturation temperature corresponding to the return air pressure of the compressor.
  • the switching of the indoor unit to the cooling mode includes: the indoor unit cooling start, the indoor unit switching from the cooling return mode to the cooling mode, and the indoor unit switching from the heating mode to the cooling mode mode.
  • the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described mode switching control method of an air conditioner.
  • the non-transitory computer readable storage medium by performing the above-described mode switching control method of the air conditioner, improves throttling by controlling the opening and down adjustment of the throttle element when the indoor unit is switched to the cooling mode
  • the effect is to obtain a lower low pressure, increase the heat exchange temperature difference and the heat exchange refrigerant flow rate, so that the indoor unit achieves better refrigeration capacity.
  • an air conditioner including: an outdoor unit including a compressor; an indoor unit, one end of the outdoor unit passing through a throttle element and the indoor unit One end of the indoor unit is connected to the other end of the outdoor unit through a liquid storage tank; and the control module is configured to acquire the liquid storage when the indoor unit is switched to the cooling mode The outlet superheat of the tank, and judge the superheat of the outlet Whether it is smaller than the first preset value, wherein if the outlet superheat is less than the first preset value, the control module performs opening degree reduction control on the throttling element until the outlet superheat degree is greater than a second preset value, wherein the second preset value is greater than the first preset value.
  • the control module acquires the outlet superheat degree of the liquid storage tank, and determines whether the outlet superheat degree is less than the first preset value, and when the outlet superheat degree is less than the first pre-predetermination
  • the throttle element is controlled to be reduced in opening degree until the outlet superheat is greater than the second preset value, thereby increasing the throttling effect by controlling the opening of the throttle element to obtain a lower low voltage.
  • the control module when the outlet superheat is less than the first preset value, the control module further performs a saturation temperature corresponding to the target recirculation pressure of the compressor according to the outlet superheat degree. Adjust and control the compressor based on the adjusted saturation temperature.
  • control module adjusts the saturation temperature corresponding to the target return air pressure of the compressor by the following formula:
  • Tesm2 MAX(Tesm1-(A-SSH)/A*4,B),
  • Tesm2 is a saturation temperature corresponding to a target return air pressure of the compressor
  • Tesm1 is a saturation temperature corresponding to a target return air pressure of the compressor before adjustment
  • A is the first preset value
  • SSH is the outlet superheat of the liquid storage tank
  • B is the saturation temperature corresponding to the minimum target exhaust pressure of the compressor.
  • control module obtains the outlet superheat of the liquid storage tank by the following formula:
  • SSH is the outlet superheat of the liquid storage tank
  • Ts is the return air temperature of the compressor
  • Te is the saturation temperature corresponding to the return air pressure of the compressor.
  • the switching of the indoor unit to the cooling mode includes: the indoor unit cooling start, the indoor unit switching from the cooling return mode to the cooling mode, and the indoor unit switching from the heating mode to the cooling mode mode.
  • FIG. 1 is a schematic structural view of an air conditioner according to an embodiment of the present invention.
  • FIG. 2 is a flow chart of a mode switching control method of an air conditioner according to an embodiment of the present invention.
  • Fig. 3 is a schematic diagram showing the mode switching control of the air conditioner of the embodiment of the present invention.
  • the air conditioner may include an outdoor unit and an indoor unit, and the outdoor unit includes a compressor, and one end of the outdoor unit is connected to one end of the indoor unit through a throttling element, and the other end of the indoor unit is connected It is connected to the other end of the outdoor unit through a liquid storage tank.
  • the heating mode is switched to the cooling mode, and the cooling and returning mode is switched to the cooling mode
  • the pressure of the liquid storage tank is too high due to the large amount of refrigerant present in the liquid storage tank.
  • the outlet superheat of the liquid storage tank is reduced, and the compressor absorbs mainly steam with less dryness from the liquid storage tank. If the compressor is still adjusted according to the saturation temperature corresponding to the normal initial target return pressure, the compression is performed.
  • the initial frequency of the machine will be relatively low, the suction effect of the compressor is small, the refrigerant of the indoor unit is less, the superheat of the indoor unit is easily oversized, and the indoor unit is usually considered to be a throttling element when the degree of superheat is high.
  • the degree is too small, and the opening degree of the throttling element is continuously increased at this time, thereby causing the throttle effect of the indoor unit to become small, and mainly the gaseous heat exchange, thereby causing the indoor unit refrigeration capacity to deteriorate.
  • embodiments of the present invention provide a mode switching control method for an air conditioner to pass through when the air conditioner is cooled, or when the heating mode is switched to the cooling mode, or when the cooling and returning mode is switched to the cooling mode.
  • the mode switching control method of the air conditioner includes the following steps:
  • the outlet superheat of the liquid storage tank can be obtained by the following formula (1):
  • SSH is the outlet superheat of the liquid storage tank
  • Ts is the return air temperature of the compressor
  • Te is the saturation temperature corresponding to the return air pressure of the compressor.
  • the throttle element is controlled to be reduced in opening degree until the outlet superheat is greater than the second preset value.
  • the second preset value is greater than the first preset value, and the first preset value and the second preset value may be calibrated according to actual conditions, where the first preset value is a smaller value.
  • the indoor unit when the indoor unit is cooled, the indoor unit is switched from the cooling and returning mode to the cooling mode, and the indoor unit is switched from the heating mode to the cooling mode, the outlet superheat SSH of the liquid storage tank is lowered.
  • the outlet superheat SSH of the liquid storage tank is less than the first preset value, in order to increase the vacuuming effect, it is necessary to reduce the low pressure, and at this time, the low pressure can be reduced by increasing the throttling effect, that is, the throttle element of the indoor unit is reduced. Opening, and high and low pressure are within safe limits.
  • the adjustment of the throttling element is stopped, thereby increasing the heat exchange temperature and the flow rate of the heat exchange refrigerant, and improving the refrigeration capacity of the indoor unit.
  • the saturation temperature corresponding to the target recirculation pressure of the compressor is further adjusted according to the outlet superheat degree, and according to the adjusted saturation.
  • the temperature controls the compressor.
  • the saturation temperature corresponding to the target return air pressure of the compressor can be adjusted by the following formula (2):
  • Tesm2 MAX(Tesm1-(A-SSH)/A*4,B) (2)
  • Tesm2 is the saturation temperature corresponding to the target return pressure of the adjusted compressor
  • Tesm1 is the saturation temperature corresponding to the target return pressure of the compressor before adjustment
  • A is the first preset value
  • SSH is the liquid storage tank.
  • B is the saturation temperature corresponding to the minimum target exhaust pressure of the compressor (the saturation temperature corresponding to the minimum target exhaust pressure that ensures the safe operation of the system).
  • the system After adjusting the throttle element and compressor frequency, the system will obtain a lower return air pressure Pe (or the saturation temperature Te corresponding to the return air pressure).
  • Pe or the saturation temperature Te corresponding to the return air pressure.
  • the SSH is greater than the second pre-
  • the adjustment of the throttle element and the compressor is stopped, thereby realizing the rapid migration of the refrigerant in the liquid storage tank to the indoor unit by increasing the vacuum effect, reducing the low pressure, increasing the heat exchange temperature difference and the heat exchange refrigerant flow rate, and improving The cooling capacity of the indoor unit.
  • the mode switching control method of the air conditioner acquires the outlet superheat of the liquid storage tank when the indoor unit is switched to the cooling mode, and determines whether the outlet superheat is less than the first preset value. If the outlet superheat is less than the first preset value, the throttle element is controlled to be reduced in opening degree until the outlet superheat is greater than the second preset value, thereby increasing the throttling by controlling the opening of the throttle element The effect is to obtain a lower low pressure.
  • the vacuuming capacity can be increased by increasing the frequency of the compressor, thereby effectively increasing the vacuuming effect, rapidly migrating the refrigerant to the indoor unit, and reducing The low pressure increases the heat exchange temperature difference and the heat exchange refrigerant flow rate, so that the indoor unit achieves better refrigeration capacity.
  • the present invention provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described mode switching control method of the air conditioner.
  • the non-transitory computer readable storage medium by performing the above-described mode switching control method of the air conditioner, improves throttling by controlling the opening and down adjustment of the throttle element when the indoor unit is switched to the cooling mode
  • the effect is to obtain a lower low pressure, increase the heat exchange temperature difference and the heat exchange refrigerant flow rate, so that the indoor unit achieves better refrigeration capacity.
  • the air conditioner includes an outdoor unit 10, an indoor unit 20, and a control module (not specifically shown in the drawings).
  • the outdoor unit 10 includes a compressor, one end of the outdoor unit 10 is connected to one end of the indoor unit 20 through a throttle element 30, and the other end of the indoor unit 20 is connected to the other end of the outdoor unit 10 through a liquid storage tank 40.
  • the control module is configured to obtain an outlet superheat degree of the liquid storage tank 40 when the indoor unit 20 is switched to the cooling mode, and determine whether the outlet superheat degree is less than a first preset value, wherein if the outlet superheat degree is less than the first preset value, The control module performs the opening degree reduction control on the throttle element 30 until the outlet superheat is greater than the second preset value, wherein the second preset value is greater than the first preset value.
  • the outlet superheat of the liquid storage tank can be obtained by the above formula (1).
  • the control module can reduce the low pressure by increasing the throttling effect, that is, reduce the indoor unit section.
  • the opening of the flow element 30 is high and low pressure within a safe range.
  • the control module stops the adjustment of the throttling element 30, thereby increasing the heat exchange temperature and the heat exchange refrigerant flow rate, and improving the indoor unit refrigeration capacity.
  • the control module when the outlet superheat is less than the first preset value, the control module further adjusts the saturation temperature corresponding to the target recirculation pressure of the compressor according to the outlet superheat, and according to the adjustment The saturation temperature controls the compressor.
  • the control module can adjust the saturation temperature corresponding to the target return air pressure of the compressor by the above formula (2).
  • control module can be adjusted in two ways:
  • the control module adjusts the throttle element 30 and the compressor frequency
  • the system will obtain a lower return air pressure Pe (or the saturation temperature Te corresponding to the return air pressure), when detecting the outlet superheat of the liquid storage tank 40 SSH
  • Pe or the saturation temperature Te corresponding to the return air pressure
  • the adjustment of the throttle element 30 and the compressor is stopped, thereby realizing rapid migration of the refrigerant in the liquid storage tank to the indoor unit by increasing the vacuuming effect, reducing the low pressure, increasing the heat exchange temperature difference and changing
  • the heat refrigerant flow increases the cooling capacity of the indoor unit.
  • the control module acquires the outlet of the liquid storage tank when the indoor unit is switched to the cooling mode If the outlet superheat is less than the first preset value, the throttle element is controlled to be small, and the outlet superheat is greater than the second preset value. Therefore, the throttling effect can be improved by controlling the opening and down adjustment of the throttling element to obtain a lower low pressure. In addition, while the throttling element is adjusted, the pumping capacity can be increased by increasing the compressor frequency. Thereby effectively increasing the vacuuming effect, rapidly migrating the refrigerant to the indoor unit, reducing the low pressure, increasing the heat exchange temperature difference and the heat exchange refrigerant flow rate, so that the indoor unit achieves better refrigeration capacity.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • any process or method description in the flowcharts or otherwise described herein can be understood as a module, segment representing code that includes one or more executable instructions for implementing the steps of a custom logic function or process. Or a part, and the scope of the preferred embodiments of the invention includes additional implementations, in which the functions may be performed in a substantially simultaneous manner or in the reverse order, depending on the functions illustrated, or in the reverse order. This should be understood by those skilled in the art to which the embodiments of the present invention pertain.
  • a "computer-readable medium” can be any program that can contain, store, communicate, propagate, or transport a program for use in an instruction execution system, apparatus, or device, or in conjunction with such an instruction execution system, apparatus, or device. s installation.
  • computer readable media include the following: electrical connections (electronic devices) having one or more wires, portable computer disk cartridges (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM).
  • the computer readable medium may even be a paper or other suitable medium on which the program can be printed, as it may be optically scanned, for example by paper or other medium, followed by editing, interpretation or, if appropriate, other suitable The method is processed to obtain the program electronically and then stored in computer memory.

Abstract

一种空调器及其模式切换控制方法，空调器包括室外机（10）和室内机（20），室外机包括压缩机，室外机（10）的一端通过节流元件（30）与室内机（20）的一端相连，室内机（20）的另一端通过储液罐（40）与室外机（10）的另一端相连，控制方法包括以下步骤：在室内机（20）切换至制冷模式时，获取储液罐（40）的出口过热度，并判断出口过热度是否小于第一预设值（S1）；如果出口过热度小于第一预设值，则对节流元件（30）进行开度调小控制，直至出口过热度大于第二预设值（S2），其中，第二预设值大于第一预设值。

Description

空调器及其模式切换控制方法 技术领域
本发明涉及空调技术领域，特别涉及一种空调器及其模式切换控制方法。
背景技术
在空调系统中，制热模式和制冷模式的室内外换热器的作用正好相反。其中，当空调系统以制热模式运行时，室外机的低压侧作为蒸发器使用，而室内机的高压侧作为冷凝器使用；当空调系统以制冷模式运行时，室外机的高压侧作为冷凝器使用，而室内机的低压侧作为蒸发器使用。
在制冷模式下，冷媒在室外冷凝器中被冷凝，而在制热模式下，冷媒在室内冷凝器中被冷凝。冷凝器的大小决定了系统所能承载的液态制冷剂的流量。由于制热模式下系统所需冷媒流量少，而在制冷模式下，系统所需冷媒流量大，但在一套系统中，通常只能充注固定流量的冷媒，因此通过配置储液罐将制热模式下不需要的冷媒储存起来。另外，在空调系统制冷关机时，室外机的高压高，储液罐的压力相对比较低，系统的冷媒会自动从室外冷凝器迁移至储液罐内。此外，在空调系统制冷回油时，压缩机的频率较高，室内机的节流元件开度大，冷媒会高速携带油回到室外机，同时大量的冷媒也会回到储液罐内。
因此，在系统由制热模式切换至制冷模式、系统制冷启动以及系统由制冷回油模式切换至制冷模式时，储液罐内都会有大量冷媒存在，很容易导致低压过高，室内机冷媒流量偏少，进而导致室内机制冷能力变差。
发明内容
本发明旨在至少在一定程度上解决相关技术中的技术问题之一。为此，本发明的一个目的在于提出一种空调器的模式切换控制方法，该方法在室内机切换至制冷模式时，通过对节流元件进行开度调小控制来提高节流效应，以获得更低的低压，提高换热温差和换热冷媒流量，使室内机达到更好的制冷能力。
本发明的另一个目的在于提出一种非临时性计算机可读存储介质。
本发明的又一个目的在于提出一种空调器。
为实现上述目的，本发明一方面实施例提出了一种空调器的模式切换控制方法，所述空调器包括室外机和室内机，所述室外机包括压缩机，所述室外机的一端通过节流元件与所述室内机的一端相连，所述室内机的另一端通过储液罐与所述室外机的另一端相连，所述方法包括以下步骤：在所述室内机切换至制冷模式时，获取所述储液罐的出口过热度， 并判断所述出口过热度是否小于第一预设值；如果所述出口过热度小于所述第一预设值，则对所述节流元件进行开度调小控制，直至所述出口过热度大于第二预设值，其中，所述第二预设值大于所述第一预设值。
根据本发明实施例的空调器的模式切换控制方法，在室内机切换至制冷模式时，获取储液罐的出口过热度，并判断出口过热度是否小于第一预设值，如果出口过热度小于第一预设值，则对节流元件进行开度调小控制，直至出口过热度大于第二预设值，从而通过对节流元件进行开度调小控制来提高节流效应，以获得更低的低压，提高换热温差和换热冷媒流量，使室内机达到更好的制冷能力。
根据本发明的一个实施例，当所述出口过热度小于所述第一预设值时，还根据所述出口过热度对所述压缩机的目标回气压力对应的饱和温度进行调节，并根据调节后的饱和温度对所述压缩机进行控制。
根据本发明的一个实施例，通过以下公式对所述压缩机的目标回气压力对应的饱和温度进行调节：
Tesm2＝MAX(Tesm1-(A-SSH)/A*4，B)，
其中，Tesm2为调节后的所述压缩机的目标回气压力对应的饱和温度，Tesm1为调节前的所述压缩机的目标回气压力对应的饱和温度，A为所述第一预设值，SSH为所述储液罐的出口过热度，B为所述压缩机的最小目标排气压力对应的饱和温度。
根据本发明的一个实施例，通过以下公式获取所述储液罐的出口过热度：
SSH＝Ts-Te，
其中，SSH为所述储液罐的出口过热度，Ts为所述压缩机的回气温度，Te为所述压缩机的回气压力对应的饱和温度。
根据本发明的一个实施例，所述室内机切换至制冷模式包括：所述室内机制冷启动、所述室内机从制冷回油模式切换至制冷模式以及所述室内机从制热模式切换至制冷模式。
为实现上述目的，本发明还提供一种非临时性计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述的空调器的模式切换控制方法。
本发明实施例的非临时性计算机可读存储介质，通过执行上述的空调器的模式切换控制方法，在室内机切换至制冷模式时，通过对节流元件进行开度调小控制来提高节流效应，以获得更低的低压，提高换热温差和换热冷媒流量，使室内机达到更好的制冷能力。
为实现上述目的，本发明另一方面实施例提出了一种空调器，包括：室外机，所述室外机包括压缩机；室内机，所述室外机的一端通过节流元件与所述室内机的一端相连，所述室内机的另一端通过储液罐与所述室外机的另一端相连；控制模块，所述控制模块用于在所述室内机切换至制冷模式时，获取所述储液罐的出口过热度，并判断所述出口过热度 是否小于第一预设值，其中，如果所述出口过热度小于所述第一预设值，所述控制模块则对所述节流元件进行开度调小控制，直至所述出口过热度大于第二预设值，其中，所述第二预设值大于所述第一预设值。
根据本发明实施例的空调器，控制模块在室内机切换至制冷模式时，获取储液罐的出口过热度，并判断出口过热度是否小于第一预设值，当出口过热度小于第一预设值时，对节流元件进行开度调小控制，直至出口过热度大于第二预设值，从而通过对节流元件进行开度调小控制来提高节流效应，以获得更低的低压，提高换热温差和换热冷媒流量，使室内机达到更好的制冷能力。
根据本发明的一个实施例，当所述出口过热度小于所述第一预设值时，所述控制模块还根据所述出口过热度对所述压缩机的目标回气压力对应的饱和温度进行调节，并根据调节后的饱和温度对所述压缩机进行控制。
根据本发明的一个实施例，所述控制模块通过以下公式对所述压缩机的目标回气压力对应的饱和温度进行调节：
Tesm2＝MAX(Tesm1-(A-SSH)/A*4，B)，
其中，Tesm2为调节后的所述压缩机的目标回气压力对应的饱和温度，Tesm1为调节前的所述压缩机的目标回气压力对应的饱和温度，A为所述第一预设值，SSH为所述储液罐的出口过热度，B为所述压缩机的最小目标排气压力对应的饱和温度。
根据本发明的一个实施例，所述控制模块通过以下公式获取所述储液罐的出口过热度：
SSH＝Ts-Te，
其中，SSH为所述储液罐的出口过热度，Ts为所述压缩机的回气温度，Te为所述压缩机的回气压力对应的饱和温度。
根据本发明的一个实施例，所述室内机切换至制冷模式包括：所述室内机制冷启动、所述室内机从制冷回油模式切换至制冷模式以及所述室内机从制热模式切换至制冷模式。
附图说明
图1是根据本发明实施例的空调器的结构示意图。
图2是根据本发明实施例的空调器的模式切换控制方法的流程图。
图3是本发明实施例的空调器的模式切换控制原理图。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描 述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
在本发明的实施例中，如图1所示，空调器可包括室外机和室内机，室外机包括压缩机，室外机的一端通过节流元件与室内机的一端相连，室内机的另一端通过储液罐与室外机的另一端相连。
如图1所示，当空调器制冷启动、由制热模式切换至制冷模式以及由制冷回油模式切换至制冷模式时，由于储液罐内存在大量冷媒，使得储液罐的压力过高，储液罐的出口过热度降低，压缩机从储液罐吸收的主要是干度较小的蒸汽，如果此时仍按照正常的初始目标回气压力对应的饱和温度对压缩机进行调节，则压缩机的初始频率会比较低，压缩机的抽吸作用较小，室内机的冷媒偏少，室内机的过热度很容易过大，而室内机通常在过热度大时会认为是节流元件开度太小，此时会不断调大节流元件的开度，从而导致室内机节流效应变小，且主要是气态换热，进而导致室内机制冷能力变差。
为此，本发明的实施例提出了一种空调器的模式切换控制方法，以在空调器制冷启动，或者由制热模式切换至制冷模式，或者由制冷回油模式切换至制冷模式时，通过降低低压来提高抽真空效应，提高换热温差和换热冷媒流量，使室内机达到更好的制冷能力。
图2是根据本发明实施例的空调器的模式切换控制方法的流程图。如图2所示，该空调器的模式切换控制方法包括以下步骤：
S1，在室内机切换至制冷模式时，获取储液罐的出口过热度，并判断出口过热度是否小于第一预设值。
根据本发明的一个实施例，可通过下述公式(1)获取储液罐的出口过热度：
SSH＝Ts-Te           (1)
其中，SSH为储液罐的出口过热度，Ts为压缩机的回气温度，Te为压缩机的回气压力对应的饱和温度。
S2，如果出口过热度小于第一预设值，则对节流元件进行开度调小控制，直至出口过热度大于第二预设值。其中，第二预设值大于第一预设值，第一预设值和第二预设值可根据实际情况进行标定，第一预设值为较小的值。
具体地，当室内机制冷启动、室内机从制冷回油模式切换至制冷模式以及室内机从制热模式切换至制冷模式时，储液罐的出口过热度SSH会降低。当检测到储液罐的出口过热度SSH小于第一预设值时，为了提高抽真空效应，需要降低低压，此时可通过提高节流效应来降低低压，即减小室内机节流元件的开度，且高低压在安全范围内。当检测到储液罐的出口过热度SSH大于第二预设值时，停止对节流元件的调节，从而提高换热温度和换热冷媒流量，提高室内机制冷能力。
进一步地，在本发明的一个实施例中，当出口过热度小于第一预设值时，还根据出口过热度对压缩机的目标回气压力对应的饱和温度进行调节，并根据调节后的饱和温度对压缩机进行控制。其中，可通过下述公式(2)对压缩机的目标回气压力对应的饱和温度进行调节：
Tesm2＝MAX(Tesm1-(A-SSH)/A*4，B)            (2)
其中，Tesm2为调节后的压缩机的目标回气压力对应的饱和温度，Tesm1为调节前的压缩机的目标回气压力对应的饱和温度，A为第一预设值，SSH为储液罐的出口过热度，B为压缩机的最小目标排气压力对应的饱和温度(保证系统能够安全运行的最小目标排气压力对应的饱和温度)。
具体地，如图3所示，在接收到制冷模式切换后，当检测到储液罐的出口过热度SSH小于第一预设值A时，为了加快抽真空效应，需要降低低压，此时有两方面可以调节：
1)提高节流效应，即减小室内机节流元件的开度；
2)通过提高压缩机频率来提高抽真空动力，即先获取当前储液罐的出口过热度SSH、压缩机的目标排气压力对应的饱和温度Tesm1，然后通过上述公式(2)计算出新的压缩机的目标排气压力对应的饱和温度Tesm2，并根据目标排气压力对应的饱和温度Tesm2对压缩机进行控制，此时压缩机的频率会按照需求提高，且高低压在安全范围内。
在对节流元件和压缩机频率进行调节后，系统会获得更低的回气压力Pe(或者回气压力对应的饱和温度Te)，当检测到储液罐的出口过热度SSH大于第二预设值C时，停止对节流元件和压缩机的调节，从而实现通过提高抽真空效应将储液罐内的冷媒快速迁移至室内机，降低低压，提高换热温差和换热冷媒流量，提高室内机的制冷能力。
综上所述，根据本发明实施例的空调器的模式切换控制方法，在室内机切换至制冷模式时，获取储液罐的出口过热度，并判断出口过热度是否小于第一预设值，如果出口过热度小于第一预设值，则对节流元件进行开度调小控制，直至出口过热度大于第二预设值，从而通过对节流元件进行开度调小控制来提高节流效应，以获得更低的低压，另外，在对节流元件调节的同时，还可以通过提高压缩机频率来提高抽真空能力，从而有效提高抽真空效应，将冷媒快速迁移至室内机，并降低低压，提高换热温差和换热冷媒流量，使室内机达到更好的制冷能力。
另外，本发明还提供一种非临时性计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述的空调器的模式切换控制方法。
本发明实施例的非临时性计算机可读存储介质，通过执行上述的空调器的模式切换控制方法，在室内机切换至制冷模式时，通过对节流元件进行开度调小控制来提高节流效应，以获得更低的低压，提高换热温差和换热冷媒流量，使室内机达到更好的制冷能力。
下面结合图1来描述根据本发明实施例提出的空调器。如图1所示，该空调器包括：室外机10、室内机20和控制模块(图中未具体示出)。
其中，室外机10包括压缩机，室外机10的一端通过节流元件30与室内机20的一端相连，室内机20的另一端通过储液罐40与室外机10的另一端相连。控制模块用于在室内机20切换至制冷模式时，获取储液罐40的出口过热度，并判断出口过热度是否小于第一预设值，其中，如果出口过热度小于第一预设值，控制模块则对节流元件30进行开度调小控制，直至出口过热度大于第二预设值，其中，第二预设值大于第一预设值。
根据本发明的一个实施例，可通过上述公式(1)获取储液罐的出口过热度。
具体地，当室内机20制冷启动、室内机20从制冷回油模式切换至制冷模式以及室内机20从制热模式切换至制冷模式时，储液罐40的出口过热度SSH会降低。当检测到储液罐40的出口过热度SSH小于第一预设值时，为了提高抽真空效应，需要降低低压，此时控制模块可通过提高节流效应来降低低压，即减小室内机节流元件30的开度，且高低压在安全范围内。当检测到储液罐40的出口过热度SSH大于第二预设值时，控制模块停止对节流元件30的调节，从而提高换热温度和换热冷媒流量，提高室内机制冷能力。
进一步地，在本发明的一个实施例中，当出口过热度小于第一预设值时，控制模块还根据出口过热度对压缩机的目标回气压力对应的饱和温度进行调节，并根据调节后的饱和温度对压缩机进行控制。其中，控制模块可通过上述公式(2)对压缩机的目标回气压力对应的饱和温度进行调节。
具体地，如图3所示，控制模块在接收到制冷模式切换后，当检测到储液罐40的出口过热度SSH小于第一预设值A时，为了加快抽真空效应，需要降低低压，此时控制模块有两方面可以调节：
1)提高节流效应，即控制模块减小室内机节流元件的开度；
2)通过提高压缩机频率来提高抽真空动力，即控制模块先获取当前储液罐40的出口过热度SSH、压缩机的目标排气压力对应的饱和温度Tesm1，然后通过上述公式(2)计算出新的压缩机的目标排气压力对应的饱和温度Tesm2，并根据目标排气压力对应的饱和温度Tesm2对压缩机进行控制，此时压缩机的频率会按照需求提高，且高低压在安全范围内。
在控制模块对节流元件30和压缩机频率进行调节后，系统会获得更低的回气压力Pe(或者回气压力对应的饱和温度Te)，当检测到储液罐40的出口过热度SSH大于第二预设值C时，停止对节流元件30和压缩机的调节，从而实现通过提高抽真空效应将储液罐内的冷媒快速迁移至室内机，降低低压，提高换热温差和换热冷媒流量，提高室内机的制冷能力。
根据本发明实施例的空调器，控制模块在室内机切换至制冷模式时，获取储液罐的出 口过热度，并判断出口过热度是否小于第一预设值，当出口过热度小于第一预设值时，对节流元件进行开度调小控制，直至出口过热度大于第二预设值，从而通过对节流元件进行开度调小控制来提高节流效应，以获得更低的低压，另外，在对节流元件调节的同时，还可以通过提高压缩机频率来提高抽真空能力，从而有效提高抽真空效应，将冷媒快速迁移至室内机，并降低低压，提高换热温差和换热冷媒流量，使室内机达到更好的制冷能力。
在本发明的描述中，需要理解的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
另外，流程图中或在此以其他方式描述的任何过程或方法描述可以被理解为，表示包括一个或更多个用于实现定制逻辑功能或过程的步骤的可执行指令的代码的模块、片段或部分，并且本发明的优选实施方式的范围包括另外的实现，其中可以不按所示出或讨论的顺序，包括根据所涉及的功能按基本同时的方式或按相反的顺序，来执行功能，这应被本发明的实施例所属技术领域的技术人员所理解。
在流程图中表示或在此以其他方式描述的逻辑和/或步骤，例如，可以被认为是用于实现逻辑功能的可执行指令的定序列表，可以具体实现在任何计算机可读介质中，以供指令执行系统、装置或设备(如基于计算机的系统、包括处理器的系统或其他可以从指令执行系统、装置或设备取指令并执行指令的系统)使用，或结合这些指令执行系统、装置或设备而使用。就本说明书而言，"计算机可读介质"可以是任何可以包含、存储、通信、传播或传输程序以供指令执行系统、装置或设备或结合这些指令执行系统、装置或设备而使用 的装置。计算机可读介质的更具体的示例(非穷尽性列表)包括以下：具有一个或多个布线的电连接部(电子装置)，便携式计算机盘盒(磁装置)，随机存取存储器(RAM)，只读存储器(ROM)，可擦除可编辑只读存储器(EPROM或闪速存储器)，光纤装置，以及便携式光盘只读存储器(CDROM)。另外，计算机可读介质甚至可以是可在其上打印所述程序的纸或其他合适的介质，因为可以例如通过对纸或其他介质进行光学扫描，接着进行编辑、解译或必要时以其他合适方式进行处理来以电子方式获得所述程序，然后将其存储在计算机存储器中。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (11)

  1. 一种空调器的模式切换控制方法，其特征在于，所述空调器包括室外机和室内机，所述室外机包括压缩机，所述室外机的一端通过节流元件与所述室内机的一端相连，所述室内机的另一端通过储液罐与所述室外机的另一端相连，所述方法包括以下步骤：
    在所述室内机切换至制冷模式时，获取所述储液罐的出口过热度，并判断所述出口过热度是否小于第一预设值；
    如果所述出口过热度小于所述第一预设值，则对所述节流元件进行开度调小控制，直至所述出口过热度大于第二预设值，其中，所述第二预设值大于所述第一预设值。
  2. 根据权利要求1所述的空调器的模式切换控制方法，其特征在于，当所述出口过热度小于所述第一预设值时，还根据所述出口过热度对所述压缩机的目标回气压力对应的饱和温度进行调节，并根据调节后的饱和温度对所述压缩机进行控制。
  3. 根据权利要求2所述的空调器的模式切换控制方法，其特征在于，通过以下公式对所述压缩机的目标回气压力对应的饱和温度进行调节：
    Tesm2＝MAX(Tesm1-(A-SSH)/A*4，B)，
    其中，Tesm2为调节后的所述压缩机的目标回气压力对应的饱和温度，Tesm1为调节前的所述压缩机的目标回气压力对应的饱和温度，A为所述第一预设值，SSH为所述储液罐的出口过热度，B为所述压缩机的最小目标排气压力对应的饱和温度。
  4. 根据权利要求1所述的空调器的模式切换控制方法，其特征在于，通过以下公式获取所述储液罐的出口过热度：
    SSH＝Ts-Te，
    其中，SSH为所述储液罐的出口过热度，Ts为所述压缩机的回气温度，Te为所述压缩机的回气压力对应的饱和温度。
  5. 根据权利要求1-4中任一项所述的空调器的模式切换控制方法，其特征在于，所述室内机切换至制冷模式包括：所述室内机制冷启动、所述室内机从制冷回油模式切换至制冷模式以及所述室内机从制热模式切换至制冷模式。
  6. 一种空调器，其特征在于，包括：
    室外机，所述室外机包括压缩机；
    室内机，所述室外机的一端通过节流元件与所述室内机的一端相连，所述室内机的另一端通过储液罐与所述室外机的另一端相连；
    控制模块，所述控制模块用于在所述室内机切换至制冷模式时，获取所述储液罐的出口过热度，并判断所述出口过热度是否小于第一预设值，其中，如果所述出口过热度小于 所述第一预设值，所述控制模块则对所述节流元件进行开度调小控制，直至所述出口过热度大于第二预设值，其中，所述第二预设值大于所述第一预设值。
  7. 根据权利要求6所述的空调器，其特征在于，当所述出口过热度小于所述第一预设值时，所述控制模块还根据所述出口过热度对所述压缩机的目标回气压力对应的饱和温度进行调节，并根据调节后的饱和温度对所述压缩机进行控制。
  8. 根据权利要求7所述的空调器，其特征在于，所述控制模块通过以下公式对所述压缩机的目标回气压力对应的饱和温度进行调节：
    Tesm2＝MAX(Tesm1-(A-SSH)/A*4，B)，
    其中，Tesm2为调节后的所述压缩机的目标回气压力对应的饱和温度，Tesm1为调节前的所述压缩机的目标回气压力对应的饱和温度，A为所述第一预设值，SSH为所述储液罐的出口过热度，B为所述压缩机的最小目标排气压力对应的饱和温度。
  9. 根据权利要求6所述的空调器，其特征在于，所述控制模块通过以下公式获取所述储液罐的出口过热度：
    SSH＝Ts-Te，
    其中，SSH为所述储液罐的出口过热度，Ts为所述压缩机的回气温度，Te为所述压缩机的回气压力对应的饱和温度。
  10. 根据权利要求6-9中任一项所述的空调器，其特征在于，所述室内机切换至制冷模式包括：所述室内机制冷启动、所述室内机从制冷回油模式切换至制冷模式以及所述室内机从制热模式切换至制冷模式。
  11. 一种非临时性计算机可读存储介质，其上存储有计算机程序，其特征在于，该程序被处理器执行时实现如权利要求1-5中任一项所述的空调器的模式切换控制方法。
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