CN115342492A - Method and device for controlling multi-split air conditioner and multi-split air conditioner - Google Patents

Method and device for controlling multi-split air conditioner and multi-split air conditioner Download PDF

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Publication number
CN115342492A
CN115342492A CN202211034756.9A CN202211034756A CN115342492A CN 115342492 A CN115342492 A CN 115342492A CN 202211034756 A CN202211034756 A CN 202211034756A CN 115342492 A CN115342492 A CN 115342492A
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China
Prior art keywords
heating
electronic expansion
expansion valve
refrigeration
air pipe
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Pending
Application number
CN202211034756.9A
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Chinese (zh)
Inventor
李旭
罗建文
宋德跃
夏鹏
裵动锡
都雪梅
张心沛
邱爽
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Qingdao Haier Central Air Conditioner Co Ltd
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Qingdao Haier Central Air Conditioner Co Ltd
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Publication date
Application filed by Qingdao Haier Central Air Conditioner Co Ltd filed Critical Qingdao Haier Central Air Conditioner Co Ltd
Priority to CN202211034756.9A priority Critical patent/CN115342492A/en
Publication of CN115342492A publication Critical patent/CN115342492A/en
Priority to PCT/CN2023/109634 priority patent/WO2024041302A1/en
Pending legal-status Critical Current

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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
    • 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
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/38—Failure diagnosis
    • 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
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • Fuzzy Systems (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application discloses a method for controlling a multi-split air conditioner, the multi-split air conditioner includes: an outdoor unit; refrigerating the indoor unit; heating the indoor unit; the outdoor unit four-way valve is connected with the heat exchanger, the high-pressure air pipe, the compressor, the gas-liquid separator and the low-pressure air pipe; the refrigeration valve box comprises a first refrigeration electronic expansion valve connected with an air pipe and a high-pressure air pipe of the refrigeration indoor unit, and a second refrigeration electronic expansion valve connected with the air pipe and the low-pressure air pipe of the refrigeration indoor unit; the heating valve box comprises a heating valve box, a first heating electronic expansion valve connected with the high-pressure air pipe and the heating indoor air pipe, and a second heating electronic expansion valve connected with the low-pressure air pipe and the heating indoor air pipe; the method comprises the following steps: determining an operation mode of the multi-split air conditioner; and controlling the switches of the four-way valve, the first refrigeration electronic expansion valve, the second refrigeration electronic expansion valve, the first heating electronic expansion valve and the second heating electronic expansion valve of the outdoor unit according to the operation mode of the multi-split air conditioner so as to realize the simultaneous heating and cooling of the multi-split air conditioner.

Description

Method and device for controlling multi-split air conditioner and multi-split air conditioner
Technical Field
The present disclosure relates to the field of intelligent home appliance technologies, and in particular, to a method and an apparatus for controlling a multi-split air conditioner, and a storage medium.
Background
At present, with the development of the multi-split air conditioner technology, the multi-split air conditioner system is more and more widely applied to houses and small and medium public buildings, but the simultaneous cooling and heating are difficult to realize.
In order to realize a cooling and heating simultaneous system, the following methods are mainly adopted in the related art: the outdoor unit adopts two four-way valves. Or, a pipe is added between the outdoor unit four-way valve and the outdoor heat exchanger, and the directions of the high-pressure refrigerant and the low-pressure refrigerant are switched in the valve box. Alternatively, the high pressure side and the low pressure side of the valve box are connected by piping on the discharge side and the suction side of the outdoor unit compressor, and in this case, the high pressure side expansion valve and the low pressure side expansion valve of the valve box are fixed, and the low pressure side expansion valve of the valve box is opened during the cooling operation of the indoor unit, and the high pressure side expansion valve of the valve box is opened during the heating operation of the indoor unit.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the multi-split air conditioner capable of refrigerating and heating simultaneously in the related art, the number of four-way valves is large, an outdoor unit and a valve box are complex, the structure and the control logic are complex, and the cost of the whole air conditioner is high.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for controlling a multi-split air conditioner, the multi-split air conditioner and a storage medium, so as to simplify the structure and control logic of the multi-split air conditioner for simultaneously refrigerating and heating and reduce the overall cost.
In some embodiments, the multi-split air conditioner includes: an outdoor unit; refrigerating the indoor unit; heating the indoor unit; the outdoor unit four-way valve is connected with a heat exchanger and a high-pressure air pipe of the outdoor unit at a first end, is connected with a compressor of the outdoor unit at a second end, is connected with a gas-liquid separator of the outdoor unit at a third end, and is connected with a low-pressure air pipe at a fourth end; the refrigeration valve box is provided with a first refrigeration electronic expansion valve and a second refrigeration electronic expansion valve, one end of the first refrigeration electronic expansion valve is connected with the refrigeration indoor machine air pipe, the other end of the first refrigeration electronic expansion valve is connected with the high-pressure air pipe, one end of the second refrigeration electronic expansion valve is connected with the refrigeration indoor machine air pipe, and the other end of the second refrigeration electronic expansion valve is connected with the low-pressure air pipe; the heating valve box is provided with a first heating electronic expansion valve and a second heating electronic expansion valve, one end of the first heating electronic expansion valve is connected with the high-pressure air pipe, the other end of the first heating electronic expansion valve is connected with the air pipe of the heating indoor unit, one end of the second heating electronic expansion valve is connected with the low-pressure air pipe, and the other end of the second heating electronic expansion valve is connected with the air pipe of the heating indoor unit; the method comprises the following steps: determining an operation mode of the multi-split air conditioner; and controlling the switches of the four-way valve, the first refrigeration electronic expansion valve, the second refrigeration electronic expansion valve, the first heating electronic expansion valve and the second heating electronic expansion valve according to the operation mode of the multi-split air conditioner so as to realize the simultaneous heating and refrigeration of the multi-split air conditioner.
In some embodiments, the apparatus includes a processor configured to perform the above-described method for controlling the multi-split air conditioner, and a memory storing program instructions, when the program instructions are executed.
In some embodiments, the multi-split air conditioner includes: an outdoor unit; a refrigeration indoor unit; heating the indoor unit; the outdoor unit four-way valve is connected with a heat exchanger and a high-pressure air pipe of the outdoor unit at a first end, is connected with a compressor of the outdoor unit at a second end, is connected with a gas-liquid separator of the outdoor unit at a third end, and is connected with a low-pressure air pipe at a fourth end; the refrigeration valve box is provided with a first refrigeration electronic expansion valve and a second refrigeration electronic expansion valve, one end of the first refrigeration electronic expansion valve is connected with the refrigeration indoor machine air pipe, the other end of the first refrigeration electronic expansion valve is connected with the high-pressure air pipe, one end of the second refrigeration electronic expansion valve is connected with the refrigeration indoor machine air pipe, and the other end of the second refrigeration electronic expansion valve is connected with the low-pressure air pipe; the heating valve box is provided with a first heating electronic expansion valve and a second heating electronic expansion valve, one end of the first heating electronic expansion valve is connected with the high-pressure air pipe, the other end of the first heating electronic expansion valve is connected with the air pipe of the heating indoor unit, one end of the second heating electronic expansion valve is connected with the low-pressure air pipe, and the other end of the second heating electronic expansion valve is connected with the air pipe of the heating indoor unit; and, the above-mentioned apparatus for controlling a multi-split air conditioner.
In some embodiments, the storage medium stores program instructions that, when executed, perform the method for controlling a multi-split air conditioner as described above
The method and the device for controlling the multi-split air conditioner, the multi-split air conditioner and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
the multi-split air conditioner adopts the structure of a single outdoor unit four-way valve, a refrigerating valve box and a heating valve box, so that the heat exchanger, the high-pressure air pipe, the compressor, the gas-liquid separator and the low-pressure air pipe are connected, the refrigerating valve box is connected with the refrigerating indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through a first refrigerating electronic expansion valve and a second refrigerating electronic expansion valve, and the heating valve box is connected with the heating indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through a first heating electronic expansion valve and a second heating electronic expansion valve. And the switch of the outdoor unit four-way valve, the refrigeration valve box and the heating valve box is controlled according to the running mode of the multi-split air conditioner, so that the multi-split air conditioner can simultaneously heat and refrigerate. And the structure and the control logic of the multi-split air conditioner for simultaneously refrigerating and heating are further facilitated to be simplified, and the cost of the whole air conditioner is reduced.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated in the accompanying drawings, which correspond to the accompanying drawings and not in a limiting sense, in which elements having the same reference numeral designations represent like elements, and in which:
fig. 1 is a schematic diagram illustrating a structure of a multi-split air conditioner according to an embodiment of the disclosure;
fig. 2 is a schematic diagram of a method for controlling a multi-split air conditioner according to an embodiment of the disclosure;
fig. 3 is a schematic diagram of another method for controlling a multi-split air conditioner according to an embodiment of the disclosure;
fig. 4 is a schematic diagram of another method for controlling a multiple on-line air conditioner according to an embodiment of the disclosure;
fig. 5 is a schematic diagram of another method for controlling a multi-split air conditioner according to an embodiment of the disclosure;
fig. 6 is a schematic view illustrating an apparatus for controlling a multi-split air conditioner according to an embodiment of the present disclosure.
Reference numerals are as follows:
1: a four-way valve of the outdoor unit; 2: a heat exchanger; 3: a high-pressure air pipe; 4: a compressor; 5: a gas-liquid separator; 6: a low pressure gas pipe; 7: a refrigeration valve box; 8: a first refrigeration electronic expansion valve; 9: a second refrigeration electronic expansion valve; 10: refrigerating an indoor air pipe; 11: a refrigerating indoor liquid pipe; 12: a heating valve box; 13: a first heating electronic expansion valve; 14: a second heating electronic expansion valve; 15: an air pipe in the heating chamber; 16: a heating indoor liquid pipe; 17: a liquid pipe; 18: a tracheal pressure sensor; 19: trachea temperature sensor.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged as appropriate for the embodiments of the disclosure described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
As shown in fig. 1, an embodiment of the present disclosure provides a multi-split air conditioner, including: the outdoor unit, the refrigerating indoor unit, the heating indoor unit, the outdoor unit four-way valve 1, the refrigerating valve box 7 and the heating valve box 12. The outdoor unit four-way valve 1 is characterized in that a first end of the outdoor unit four-way valve 1 is connected with a heat exchanger 2 and a high-pressure air pipe 3 of the outdoor unit, a second end of the outdoor unit four-way valve 1 is connected with a compressor 4 of the outdoor unit, a third end of the outdoor unit four-way valve is connected with a gas-liquid separator 5 of the outdoor unit, and a fourth end of the outdoor unit four-way valve 1 is connected with a low-pressure air pipe 6. The refrigeration valve box 7 is provided with a first refrigeration electronic expansion valve 8 and a second refrigeration electronic expansion valve 9, one end of the first refrigeration electronic expansion valve 8 is connected with the refrigeration indoor machine air pipe 10, the other end of the first refrigeration electronic expansion valve is connected with the high-pressure air pipe 3, one end of the second refrigeration electronic expansion valve 9 is connected with the refrigeration indoor machine air pipe 10, and the other end of the second refrigeration electronic expansion valve is connected with the low-pressure air pipe 6. The heating valve box 12 is provided with a first heating electronic expansion valve 13 and a second heating electronic expansion valve 14, one end of the first heating electronic expansion valve 13 is connected with the high-pressure air pipe 3, the other end is connected with a heating indoor machine air pipe 15, one end of the second heating electronic expansion valve 14 is connected with the low-pressure air pipe 6, and the other end is connected with the heating indoor machine air pipe 15.
Optionally, one end of the first refrigeration electronic expansion valve 8 connected to the high-pressure gas pipe 3, one end of the second refrigeration electronic expansion valve 9 connected to the low-pressure gas pipe 6, and a liquid pipe 11 of the refrigeration indoor unit are further connected. The liquid pipe 11 of the refrigerating indoor unit is connected with the liquid pipe 17, and the liquid pipe 17 is connected with the heat exchanger 2 of the outdoor unit.
Alternatively, one end of the first heating electronic expansion valve 13 connected to the high-pressure air pipe 3, one end of the second heating electronic expansion valve 14 connected to the low-pressure air pipe 6, and a heating indoor unit liquid pipe 16 are further connected. The heating indoor unit liquid pipe 16 is connected with the liquid pipe 17.
Optionally, the multi-split air conditioner further comprises an air pipe pressure sensor 18. The air pipe pressure sensor 18 is provided on the high pressure air pipe 3 and the low pressure air pipe 6 for detecting the air pipe line pressure P.
Optionally, the multi-split air conditioner further comprises an air pipe temperature sensor 19. The air pipe temperature sensor 19 is arranged on the high-pressure air pipe 3 and the low-pressure air pipe 6 and used for detecting the air pipe pipeline temperature T.
By adopting the multi-split air conditioner provided by the embodiment of the disclosure, the multi-split air conditioner adopts the structure of a single outdoor unit four-way valve, a refrigeration valve box and a heating valve box, so that the heat exchanger, the high-pressure air pipe, the compressor, the gas-liquid separator and the low-pressure air pipe are connected, the refrigeration valve box is connected with the refrigeration indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first refrigeration electronic expansion valve and the second refrigeration electronic expansion valve, and the heating valve box is connected with the heating indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first heating electronic expansion valve and the second heating electronic expansion valve. And the structure of the multi-split air conditioner for simultaneously refrigerating and heating is facilitated to be simplified, and the cost of the whole air conditioner is reduced.
Referring to fig. 2, an embodiment of the present disclosure provides a method for controlling a multiple split air conditioner, including:
s201, the multi-split air conditioner determines the operation mode of the multi-split air conditioner.
And S202, controlling the on-off of the outdoor unit four-way valve, the first refrigeration electronic expansion valve, the second refrigeration electronic expansion valve, the first heating electronic expansion valve and the second heating electronic expansion valve by the multi-split air conditioner according to the operation mode of the multi-split air conditioner so as to realize the simultaneous heating and refrigeration of the multi-split air conditioner.
By adopting the method for controlling the multi-split air conditioner provided by the embodiment of the disclosure, the multi-split air conditioner adopts the structure of a single outdoor unit four-way valve, a refrigeration valve box and a heating valve box, so that the heat exchanger, the high-pressure air pipe, the compressor, the gas-liquid separator and the low-pressure air pipe are connected, the refrigeration valve box is connected with the refrigeration indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first refrigeration electronic expansion valve and the second refrigeration electronic expansion valve, and the heating valve box is connected with the heating indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first heating electronic expansion valve and the second heating electronic expansion valve. And the switch of the outdoor unit four-way valve, the refrigeration valve box and the heating valve box is controlled according to the running mode of the multi-split air conditioner, so that the multi-split air conditioner can simultaneously heat and refrigerate. And the structure and the control logic of the multi-split air conditioner for simultaneously refrigerating and heating are further facilitated to be simplified, and the cost of the whole air conditioner is reduced.
Optionally, the operation modes of the multi-split air conditioner include: a first cooling mode configured to cool the indoor unit fully. Or, the second cooling mode is configured to use the cooling indoor unit as a cooling main body and to heat the heating indoor unit. Or, a first heating mode configured to heat the indoor unit for full heating. Or, the second heating mode is configured to use the heating indoor unit as a heating main body and cool the cooling indoor unit for cooling. Therefore, the operation modes of the multi-split air conditioner are divided into four operation modes, namely, the refrigeration indoor unit is used for full refrigeration, the refrigeration indoor unit is used as a refrigeration main body and the heating indoor unit is used for heating, the heating indoor unit is used for full heating, and the heating indoor unit is used as a heating main body and the refrigeration indoor unit is used for refrigeration, so that the on-off of the outdoor unit four-way valve, the refrigeration valve box and the heating valve box can be controlled according to the multiple operation modes of the multi-split air conditioner, and the multi-split air conditioner can be used for heating and refrigerating at the same time.
Optionally, the controlling, by the multi-split air conditioner, switches of the outdoor unit four-way valve, the first refrigeration electronic expansion valve, the second refrigeration electronic expansion valve, the first heating electronic expansion valve, and the second heating electronic expansion valve according to the operation mode of the multi-split air conditioner includes: and under the condition that the operation mode of the multi-split air conditioner is the first refrigeration mode, controlling the four-way valve of the outdoor unit to be communicated with the heat exchanger, the compressor, the low-pressure air pipe and the gas-liquid separator of the outdoor unit, controlling the first refrigeration electronic expansion valve to be closed, and controlling the second refrigeration electronic expansion valve to be opened to be communicated with the air pipe and the low-pressure air pipe of the refrigeration indoor unit, so that the refrigerant circulation loop is a full refrigeration refrigerant circulation loop. And under the condition that the operation mode of the multi-split air conditioner is a second refrigeration mode, controlling the four-way valve of the outdoor unit to be communicated with the heat exchanger, the high-pressure air pipe, the compressor, the low-pressure air pipe and the gas-liquid separator of the outdoor unit, controlling the first refrigeration electronic expansion valve and the second heating electronic expansion valve to be closed, controlling the second refrigeration electronic expansion valve to be opened to be communicated with the refrigeration indoor air pipe and the low-pressure air pipe, and controlling the first heating electronic expansion valve to be opened to be communicated with the high-pressure air pipe and the heating indoor air pipe, so that the refrigerant circulation loop is used as a main refrigeration refrigerant circulation loop and an auxiliary heating refrigerant circulation loop. And under the condition that the operation mode of the multi-split air conditioner is the first heating mode, controlling the four-way valve to be communicated with the heat exchanger, the compressor, the low-pressure air pipe and the gas-liquid separator of the outdoor unit, and controlling the second heating electronic expansion valve to be opened to be communicated with the low-pressure air pipe and the air pipe in the heating indoor unit so as to enable the refrigerant circulation loop to be a full heating refrigerant circulation loop. And under the condition that the operation mode of the multi-split air conditioner is a second heating mode, controlling a four-way valve of the outdoor unit to be communicated with a heat exchanger, a high-pressure air pipe, a compressor, a low-pressure air pipe and a gas-liquid separator of the outdoor unit, controlling a second refrigeration electronic expansion valve and a first heating electronic expansion valve to be closed, controlling the first refrigeration electronic expansion valve to be opened to be communicated with a refrigeration indoor air pipe and a high-pressure air pipe, and controlling the second heating electronic expansion valve to be opened to be communicated with a low-pressure air pipe and a heating indoor air pipe, so that a refrigerant circulation loop is used as a main heating refrigerant circulation loop and an auxiliary cooling refrigerant circulation loop.
Specifically, the full-refrigeration refrigerant circulation loop sequentially comprises a compressor, a four-way valve, a heat exchanger of an outdoor unit, a liquid pipe, a refrigeration indoor unit gas pipe, a second refrigeration electronic expansion valve, a low-pressure gas pipe, a four-way valve, a gas-liquid separator and a compressor. The main refrigeration refrigerant circulation loop sequentially comprises a compressor, a four-way valve, a heat exchanger of an outdoor unit, a liquid pipe, a refrigeration indoor unit air pipe, a second refrigeration electronic expansion valve, a low-pressure air pipe, a four-way valve, a gas-liquid separator and a compressor. The auxiliary heating refrigerant circulation loop sequentially comprises a compressor, a four-way valve, a high-pressure air pipe, a first heating electronic expansion valve, a heating indoor air pipe, a heating indoor unit, a heating indoor liquid pipe, a refrigerating indoor unit, a refrigerating indoor air pipe, a second refrigerating electronic expansion valve, a low-pressure air pipe, a four-way valve, a gas-liquid separator and a compressor. The full heating refrigerant circulation loop sequentially comprises a compressor, a four-way valve, a low-pressure air pipe, a second heating electronic expansion valve, a heating indoor air pipe, a heating indoor machine liquid pipe, a heat exchanger of an outdoor machine, a four-way valve, a gas-liquid separator and a compressor. The main heating refrigerant circulation loop sequentially comprises a compressor, a four-way valve, a low-pressure air pipe, a second heating electronic expansion valve, a heating indoor air pipe, a heating indoor machine, a heating indoor liquid pipe, a heat exchanger of an outdoor machine, a four-way valve, a gas-liquid separator and a compressor. The auxiliary refrigeration refrigerant circulation loop sequentially comprises a compressor, a four-way valve, a low-pressure air pipe, a second heating electronic expansion valve, a heating indoor machine air pipe, a heating indoor machine liquid pipe, a refrigeration indoor machine air pipe, a first refrigeration electronic expansion valve, a high-pressure air pipe, a four-way valve, a gas-liquid separator and a compressor.
In this way, when the operation mode of the multi-split air conditioner is the first cooling mode, the refrigerant circulation circuit is an all-cooling refrigerant circulation circuit. And under the condition that the operation mode of the multi-split air conditioner is the second refrigeration mode, the refrigerant circulation loop is a main refrigeration refrigerant circulation loop and an auxiliary heating refrigerant circulation loop. And under the condition that the operation mode of the multi-split air conditioner is the first heating mode, the refrigerant circulation loop is a full heating refrigerant circulation loop. And under the condition that the operation mode of the multi-split air conditioner is the second heating mode, the refrigerant circulation loop is a main heating refrigerant circulation loop and an auxiliary refrigerating refrigerant circulation loop. Therefore, the on-off of the outdoor unit four-way valve, the refrigerating valve box and the heating valve box can be better controlled according to the running mode of the multi-split air conditioner, and the multi-split air conditioner can simultaneously heat and refrigerate. And the structure and the control logic of the multi-split air conditioner for simultaneously refrigerating and heating are further facilitated to be simplified, and the cost of the whole air conditioner is reduced.
With reference to fig. 3, another method for controlling a multi-split air conditioner according to an embodiment of the present disclosure includes:
and S301, the multi-split air conditioner determines the operation mode of the multi-split air conditioner.
And S302, controlling the on-off of the outdoor unit four-way valve, the first refrigeration electronic expansion valve, the second refrigeration electronic expansion valve, the first heating electronic expansion valve and the second heating electronic expansion valve by the multi-split air conditioner according to the operation mode of the multi-split air conditioner so as to realize the simultaneous heating and cooling of the multi-split air conditioner.
S303, the multi-split air conditioner determines the pressure P and the temperature T of the air pipe.
And S304, determining whether the refrigerating indoor unit or the heating indoor unit operates normally by the multi-split air conditioner according to the P and the T.
By adopting the method for controlling the multi-split air conditioner provided by the embodiment of the disclosure, the multi-split air conditioner adopts the structure of a single outdoor unit four-way valve, a refrigeration valve box and a heating valve box, so that the heat exchanger, the high-pressure air pipe, the compressor, the gas-liquid separator and the low-pressure air pipe are connected, the refrigeration valve box is connected with the refrigeration indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first refrigeration electronic expansion valve and the second refrigeration electronic expansion valve, and the heating valve box is connected with the heating indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first heating electronic expansion valve and the second heating electronic expansion valve. And the switch of the outdoor unit four-way valve, the refrigeration valve box and the heating valve box is controlled according to the running mode of the multi-split air conditioner, so that the multi-split air conditioner can simultaneously heat and refrigerate. And the structure and the control logic of the multi-split air conditioner for simultaneously refrigerating and heating are further facilitated to be simplified, and the cost of the whole air conditioner is reduced. Whether the operation of the refrigerating indoor unit or the heating indoor unit is normal or not is determined according to the air pipe line pressure P and the air pipe line temperature T, so that the installation error of the pipelines in actual application is avoided, and the normal use of the multi-split air conditioner is ensured.
Optionally, the determining, by the multi-split air conditioner according to P and T, whether the operation of the cooling indoor unit or the heating indoor unit is normal includes: and under the condition that the refrigerating indoor unit performs refrigeration, the multi-split air conditioner determines whether the refrigerating indoor unit operates normally according to P and T. And under the condition that the heating indoor unit performs heating, the multi-split air conditioner determines whether the heating indoor unit operates normally according to P and T. Therefore, whether the refrigerating indoor unit or the heating indoor unit operates normally can be better determined according to the pressure P and the temperature T of the air pipe pipeline, and therefore installation errors of the pipeline in actual application can be avoided, and normal use of the multi-split air conditioner is guaranteed.
Optionally, the determining, by the multi-split air conditioner according to P and T, whether the operation of the refrigeration indoor unit is normal includes: and the multi-split air conditioner determines whether the refrigerating indoor units normally operate according to P, pss, T and Tps _ temp. Wherein Pss is the low pressure of the outdoor unit, and Tps _ temp is the saturation temperature corresponding to the low pressure of the outdoor unit. Specifically, the method for determining whether the refrigerating indoor unit operates normally according to P, pss, T and Tps _ temp in the multi-split air conditioner includes: and under the conditions that the Pss is less than or equal to P and less than or equal to Pss plus delta P1 and the Tps _ temp is less than or equal to Tps _ temp plus delta T1, the multi-split air conditioner determines that the refrigeration indoor unit normally operates. And under the condition that P is less than Pss, or Pss plus delta P1, or T is less than Tps _ temp, or T is more than Tps _ temp plus delta T1, the multi-split air conditioner determines that the operation of the refrigerating indoor unit is abnormal. Wherein, Δ P1 is a first preset pressure difference, and Δ T1 is a first preset temperature difference. More specifically, Δ P1 may take the value 2bar. The value of Δ T1 may be 2 ℃. The values of Δ P1 and Δ T1 may be adjusted and set according to the actual attributes of the multi-split air conditioner, which is not exemplified here. Thus, when the refrigeration indoor unit performs refrigeration, if Pss is less than or equal to P and less than or equal to Pss + delta P1 and Tps _ temp is less than or equal to Tps _ temp + delta T1, the refrigeration indoor unit operates normally, and if P is less than Pss, or Pss + delta P1, or T is less than Tps _ temp, or T is more than Tps _ temp + delta T1, the refrigeration indoor unit operates abnormally. The method is favorable for determining whether the refrigeration indoor unit operates normally or not according to P, pss, T and Tps _ temp, thereby being favorable for avoiding the installation error of pipelines in actual application and ensuring the normal use of the multi-split air conditioner.
Optionally, the determining, by the multi-split air conditioner according to P and T, whether the operation of the heating indoor unit is normal includes: and the multi-split air conditioner determines whether the heating indoor units operate normally according to P, pds, T, tpds _ temp and Td. Pds is a high pressure of the outdoor unit, tpds _ temp is a saturation temperature corresponding to the high pressure of the outdoor unit, and Td is a discharge temperature of the outdoor unit. Specifically, the method for determining whether the heating indoor units operate normally according to P, pds, T, tpds _ temp and Td includes: and under the conditions that P is more than or equal to Pds-delta P2 and less than or equal to Pds and Tpds _ temp +/delta T2 and less than or equal to T, the multi-split air conditioner determines that the heating indoor unit normally operates. And under the condition that P is less than Pds-delta P2, or P is more than Pds, or T is less than Tpds _ temp +. Delta T2, or T is more than Td, the multi-split air conditioner determines that the heating indoor unit operates abnormally. Wherein Δ P2 is a second predetermined pressure difference, and Δ T2 is a second predetermined temperature difference. More specifically, Δ P2 may take the value 5bar. The value of Δ T1 may be 5 ℃. The values of Δ P2 and Δ T2 may be adjusted and set according to the actual attributes of the multi-split air conditioner, which is not exemplified here. Thus, when the heating indoor unit performs heating, if Pds-delta P2 is not less than P and not more than Pds and Tpds _ temp +. Delta T2 is not less than T and not more than Td, the heating indoor unit operates normally, and if P < Pds-delta P2, or P > Pds, or T < Tpds _ temp +. Delta T2, or T > Td, the heating indoor unit operates abnormally. The method is favorable for determining whether the heating indoor unit operates normally or not according to P, pds, T, tpds _ temp and Td, thereby being favorable for avoiding the installation error of the pipeline in the actual application and ensuring the normal use of the multi-split air conditioner.
With reference to fig. 4, another method for controlling a multiple split air conditioner according to an embodiment of the present disclosure includes:
s401, the multi-split air conditioner determines the operation mode of the multi-split air conditioner.
And S402, controlling the on-off of the outdoor unit four-way valve, the first refrigeration electronic expansion valve, the second refrigeration electronic expansion valve, the first heating electronic expansion valve and the second heating electronic expansion valve by the multi-split air conditioner according to the operation mode of the multi-split air conditioner so as to realize the simultaneous heating and cooling of the multi-split air conditioner.
And S403, determining the pressure P and the temperature T of the air pipe by the multi-split air conditioner.
And S404, determining whether the refrigerating indoor unit or the heating indoor unit operates normally by the multi-split air conditioner according to the P and the T.
S405, under the condition that the refrigerating indoor unit or the heating indoor unit is abnormal in operation, the multi-split air conditioner sends an indoor unit abnormity prompt and stops checking.
By adopting the method for controlling the multi-split air conditioner provided by the embodiment of the disclosure, the multi-split air conditioner adopts the structure of a single outdoor unit four-way valve, a refrigeration valve box and a heating valve box, so that the heat exchanger, the high-pressure air pipe, the compressor, the gas-liquid separator and the low-pressure air pipe are connected, the refrigeration valve box is connected with the refrigeration indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first refrigeration electronic expansion valve and the second refrigeration electronic expansion valve, and the heating valve box is connected with the heating indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first heating electronic expansion valve and the second heating electronic expansion valve. And the switch of the outdoor unit four-way valve, the refrigeration valve box and the heating valve box is controlled according to the running mode of the multi-split air conditioner, so that the multi-split air conditioner can simultaneously heat and refrigerate. And the structure and the control logic of the multi-split air conditioner for simultaneously refrigerating and heating are further facilitated to be simplified, and the cost of the whole air conditioner is reduced. Whether the operation of the refrigerating indoor unit or the heating indoor unit is normal or not is determined according to the air pipe pipeline pressure P and the air pipe pipeline temperature T, the indoor unit abnormity reminding is sent and the shutdown inspection is carried out under the condition that the operation of the refrigerating indoor unit or the heating indoor unit is abnormal, the pipeline installation error in the actual application can be avoided, and the normal use of the multi-split air conditioner can be guaranteed.
With reference to fig. 5, another method for controlling a multi-split air conditioner according to an embodiment of the present disclosure includes:
and S501, the multi-split air conditioner determines the operation mode of the multi-split air conditioner.
And S502, under the condition that the operation mode of the multi-split air conditioner is the first refrigeration mode, controlling the four-way valve of the outdoor unit to be communicated with the heat exchanger, the compressor, the low-pressure air pipe and the gas-liquid separator of the outdoor unit, controlling the first refrigeration electronic expansion valve to be closed, and controlling the second refrigeration electronic expansion valve to be opened to be communicated with the air pipe and the low-pressure air pipe of the refrigeration indoor unit, so that the refrigerant circulation loop is a full refrigeration refrigerant circulation loop.
And S503, under the condition that the operation mode of the multi-split air conditioner is a second refrigeration mode, controlling a four-way valve of the outdoor unit to be communicated with a heat exchanger, a high-pressure air pipe, a compressor, a low-pressure air pipe and a gas-liquid separator of the outdoor unit, controlling the first refrigeration electronic expansion valve and the second heating electronic expansion valve to be closed, controlling the second refrigeration electronic expansion valve to be opened to be communicated with a refrigeration indoor air pipe and a low-pressure air pipe, and controlling the first heating electronic expansion valve to be opened to be communicated with the high-pressure air pipe and a heating indoor air pipe, so that a refrigerant circulation loop is used as a main refrigeration refrigerant circulation loop and an auxiliary heating refrigerant circulation loop.
And S504, under the condition that the operation mode of the multi-split air conditioner is the first heating mode, controlling the four-way valve to be communicated with the heat exchanger, the compressor, the low-pressure air pipe and the gas-liquid separator of the outdoor unit, and controlling the second heating electronic expansion valve to be opened to be communicated with the low-pressure air pipe and the air pipe in the heating room, so that the refrigerant circulation loop is a full heating refrigerant circulation loop.
And S505, under the condition that the operation mode of the multi-split air conditioner is a second heating mode, controlling a four-way valve of the outdoor unit to be communicated with a heat exchanger, a high-pressure air pipe, a compressor, a low-pressure air pipe and a gas-liquid separator of the outdoor unit, controlling a second refrigeration electronic expansion valve and a first heating electronic expansion valve to be closed, controlling the first refrigeration electronic expansion valve to be opened to be communicated with a refrigeration indoor air pipe and a high-pressure air pipe, and controlling the second heating electronic expansion valve to be opened to be communicated with the low-pressure air pipe and a heating indoor air pipe, so that a refrigerant circulation loop is used as a main heating refrigerant circulation loop and an auxiliary cooling refrigerant circulation loop.
The operation mode of the multi-split air conditioner comprises the following steps: a first cooling mode configured to cool the indoor unit fully. Or, the second cooling mode is configured to use the cooling indoor unit as a cooling body and to heat the heating indoor unit. Or, a first heating mode configured to heat the indoor unit fully. Or, the second heating mode is configured to use the heating indoor unit as a heating main body and cool the cooling indoor unit for cooling.
By adopting the method for controlling the multi-split air conditioner provided by the embodiment of the disclosure, the multi-split air conditioner adopts the structure of a single outdoor unit four-way valve, a refrigeration valve box and a heating valve box, so that the heat exchanger, the high-pressure air pipe, the compressor, the gas-liquid separator and the low-pressure air pipe are connected, the refrigeration valve box is connected with the refrigeration indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first refrigeration electronic expansion valve and the second refrigeration electronic expansion valve, and the heating valve box is connected with the heating indoor unit air pipe, the high-pressure air pipe and the low-pressure air pipe through the first heating electronic expansion valve and the second heating electronic expansion valve. And under the condition that the operation mode of the multi-split air conditioner is the first refrigeration mode, enabling the refrigerant circulation loop to be a full-refrigeration refrigerant circulation loop. And under the condition that the operation mode of the multi-split air conditioner is a second refrigeration mode, the refrigerant circulation loop is a main refrigeration refrigerant circulation loop and an auxiliary heating refrigerant circulation loop. And under the condition that the operation mode of the multi-split air conditioner is the first heating mode, the refrigerant circulation loop is a full heating refrigerant circulation loop. And under the condition that the operation mode of the multi-split air conditioner is the second heating mode, the refrigerant circulation loop is a main heating refrigerant circulation loop and an auxiliary refrigerating refrigerant circulation loop. Therefore, the on-off of the outdoor unit four-way valve, the refrigeration valve box and the heating valve box can be better controlled according to the running mode of the multi-split air conditioner, and the multi-split air conditioner can simultaneously heat and refrigerate. And the structure and the control logic of the multi-split air conditioner for simultaneously refrigerating and heating are further facilitated to be simplified, and the cost of the whole air conditioner is reduced.
As shown in fig. 6, an embodiment of the present disclosure provides an apparatus for controlling a multiple on-line air conditioner, which includes a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other through the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call the logic instructions in the memory 101 to perform the method for controlling the multi-split air conditioner of the above-described embodiment.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 performs functional applications and data processing, i.e., implements the method for controlling the multi-split air conditioner in the above-described embodiments, by executing program instructions/modules stored in the memory 101.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, memory 101 may include high speed random access memory and may also include non-volatile memory.
The embodiment of the disclosure provides a multi-split air conditioner, which comprises an outdoor unit, a refrigerating indoor unit, a heating indoor unit, an outdoor unit four-way valve, a refrigerating valve box, a heating valve box and the device for controlling the multi-split air conditioner. And a first end of the outdoor unit four-way valve is connected with the heat exchanger and the high-pressure air pipe of the outdoor unit, a second end of the outdoor unit four-way valve is connected with the compressor of the outdoor unit, a third end of the outdoor unit four-way valve is connected with the gas-liquid separator of the outdoor unit, and a fourth end of the outdoor unit four-way valve is connected with the low-pressure air pipe. The refrigeration valve box is provided with a first refrigeration electronic expansion valve and a second refrigeration electronic expansion valve, one end of the first refrigeration electronic expansion valve is connected with the refrigeration indoor machine air pipe, the other end of the first refrigeration electronic expansion valve is connected with the high-pressure air pipe, one end of the second refrigeration electronic expansion valve is connected with the refrigeration indoor machine air pipe, and the other end of the second refrigeration electronic expansion valve is connected with the low-pressure air pipe. And the heating valve box is provided with a first heating electronic expansion valve and a second heating electronic expansion valve, one end of the first heating electronic expansion valve is connected with the high-pressure air pipe, the other end of the first heating electronic expansion valve is connected with the air pipe of the heating indoor unit, one end of the second heating electronic expansion valve is connected with the low-pressure air pipe, and the other end of the second heating electronic expansion valve is connected with the air pipe of the heating indoor unit.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for controlling a multi-split air conditioner.
The disclosed embodiments provide a computer program product including a computer program stored on a computer-readable storage medium, the computer program including program instructions that, when executed by a computer, cause the computer to perform the above-described method for controlling a multi-split air conditioner.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description for example only and are not limiting upon the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a" \8230; "does not exclude the presence of additional like elements in a process, method or apparatus comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses, and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (10)

1. A method for controlling a multi-split air conditioner, the multi-split air conditioner comprising: an outdoor unit; a refrigeration indoor unit; heating the indoor unit; the outdoor unit four-way valve is connected with a heat exchanger and a high-pressure air pipe of the outdoor unit at a first end, is connected with a compressor of the outdoor unit at a second end, is connected with a gas-liquid separator of the outdoor unit at a third end, and is connected with a low-pressure air pipe at a fourth end; the refrigeration valve box is provided with a first refrigeration electronic expansion valve and a second refrigeration electronic expansion valve, one end of the first refrigeration electronic expansion valve is connected with the air pipe in the refrigeration chamber, the other end of the first refrigeration electronic expansion valve is connected with the high-pressure air pipe, one end of the second refrigeration electronic expansion valve is connected with the air pipe in the refrigeration chamber, and the other end of the second refrigeration electronic expansion valve is connected with the low-pressure air pipe; the heating valve box is provided with a first heating electronic expansion valve and a second heating electronic expansion valve, one end of the first heating electronic expansion valve is connected with the high-pressure air pipe, the other end of the first heating electronic expansion valve is connected with the air pipe of the heating indoor unit, one end of the second heating electronic expansion valve is connected with the low-pressure air pipe, and the other end of the second heating electronic expansion valve is connected with the air pipe of the heating indoor unit; the method comprises the following steps:
determining an operation mode of the multi-split air conditioner;
and controlling the switches of the outdoor unit four-way valve, the first refrigeration electronic expansion valve, the second refrigeration electronic expansion valve, the first heating electronic expansion valve and the second heating electronic expansion valve according to the operation mode of the multi-split air conditioner so as to realize the simultaneous heating and refrigeration of the multi-split air conditioner.
2. The method of claim 1, wherein the operating mode of the multi-split air conditioner comprises:
a first cooling mode configured to cool the indoor unit fully; or the like, or, alternatively,
a second cooling mode configured to use the cooling indoor unit as a cooling main body and to heat the heating indoor unit; or the like, or, alternatively,
a first heating mode configured to heat all indoor units; or the like, or, alternatively,
and a second heating mode configured to use the heating indoor units as a heating subject and cool the cooling indoor units.
3. The method as claimed in claim 1, wherein the controlling of the on/off of the outdoor unit four-way valve, the first cooling electronic expansion valve, the second cooling electronic expansion valve, the first heating electronic expansion valve, and the second heating electronic expansion valve according to the operation mode of the multi-split air conditioner comprises:
under the condition that the operation mode of the multi-split air conditioner is a first refrigeration mode, controlling a four-way valve of an outdoor unit to be communicated with a heat exchanger, a compressor, a low-pressure air pipe and a gas-liquid separator of the outdoor unit, controlling a first refrigeration electronic expansion valve to be closed, and controlling a second refrigeration electronic expansion valve to be opened to be communicated with an air pipe and a low-pressure air pipe of a refrigeration indoor unit so as to enable a refrigerant circulation loop to be a full refrigeration refrigerant circulation loop;
under the condition that the operation mode of the multi-split air conditioner is a second refrigeration mode, controlling a four-way valve of the outdoor unit to be communicated with a heat exchanger, a high-pressure air pipe, a compressor, a low-pressure air pipe and a gas-liquid separator of the outdoor unit, controlling a first refrigeration electronic expansion valve and a second heating electronic expansion valve to be closed, controlling the second refrigeration electronic expansion valve to be opened to be communicated with a refrigeration indoor air pipe and a low-pressure air pipe, and controlling the first heating electronic expansion valve to be opened to be communicated with the high-pressure air pipe and a heating indoor air pipe, so that a refrigerant circulation loop is used as a main refrigeration refrigerant circulation loop and an auxiliary heating refrigerant circulation loop;
under the condition that the operation mode of the multi-split air conditioner is a first heating mode, controlling a four-way valve to be communicated with a heat exchanger, a compressor, a low-pressure air pipe and a gas-liquid separator of an outdoor unit, and controlling a second heating electronic expansion valve to be opened to be communicated with the low-pressure air pipe and an air pipe in a heating chamber, so that a refrigerant circulation loop is a full-heating refrigerant circulation loop;
and under the condition that the operation mode of the multi-split air conditioner is a second heating mode, controlling the four-way valve of the outdoor unit to be communicated with the heat exchanger, the high-pressure air pipe, the compressor, the low-pressure air pipe and the gas-liquid separator of the outdoor unit, controlling the second refrigeration electronic expansion valve and the first heating electronic expansion valve to be closed, controlling the first refrigeration electronic expansion valve to be opened to be communicated with the refrigeration indoor air pipe and the high-pressure air pipe, and controlling the second heating electronic expansion valve to be opened to be communicated with the low-pressure air pipe and the heating indoor air pipe, so that the refrigerant circulation loop is used as a main heating refrigerant circulation loop and an auxiliary cooling refrigerant circulation loop.
4. The method of any of claims 1 to 3, further comprising:
determining the pressure P and the temperature T of the air pipe;
and determining whether the refrigerating indoor unit or the heating indoor unit operates normally according to the P and the T.
5. The method of claim 4, wherein determining whether the cooling indoor unit or the heating indoor unit is operating normally based on P and T comprises:
under the condition that the refrigerating indoor unit performs refrigeration, determining whether the refrigerating indoor unit operates normally or not according to P and T;
and under the condition that the heating indoor unit performs heating, determining whether the heating indoor unit operates normally according to P and T.
6. The method of claim 4, wherein said determining whether the refrigeration indoor unit is operating normally based on P and T comprises:
determining whether the operation of the refrigerating indoor unit is normal or not according to P, pss, T and Tps _ temp;
wherein Pss is the low pressure of the outdoor unit, and Tps _ temp is the saturation temperature corresponding to the low pressure of the outdoor unit.
7. The method according to claim 5, characterized in that said determining whether the heating indoor unit is operating normally according to P and T comprises:
determining whether the heating indoor unit operates normally according to P, pds, T, tpds _ temp and Td;
pds is a high pressure of the outdoor unit, tpds _ temp is a saturation temperature corresponding to the high pressure of the outdoor unit, and Td is a discharge temperature of the outdoor unit.
8. An apparatus for controlling a multi-split air conditioner, comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling a multi-split air conditioner according to any one of claims 1 to 7 when executing the program instructions.
9. A multi-split air conditioner, comprising:
an outdoor unit;
a refrigeration indoor unit;
heating the indoor unit;
the outdoor unit four-way valve is connected with a heat exchanger and a high-pressure air pipe of the outdoor unit at a first end, is connected with a compressor of the outdoor unit at a second end, is connected with a gas-liquid separator of the outdoor unit at a third end, and is connected with a low-pressure air pipe at a fourth end;
the refrigeration valve box is provided with a first refrigeration electronic expansion valve and a second refrigeration electronic expansion valve, one end of the first refrigeration electronic expansion valve is connected with the refrigeration indoor machine air pipe, the other end of the first refrigeration electronic expansion valve is connected with the high-pressure air pipe, one end of the second refrigeration electronic expansion valve is connected with the refrigeration indoor machine air pipe, and the other end of the second refrigeration electronic expansion valve is connected with the low-pressure air pipe;
the heating valve box is provided with a first heating electronic expansion valve and a second heating electronic expansion valve, one end of the first heating electronic expansion valve is connected with the high-pressure air pipe, the other end of the first heating electronic expansion valve is connected with the air pipe of the heating indoor unit, one end of the second heating electronic expansion valve is connected with the low-pressure air pipe, and the other end of the second heating electronic expansion valve is connected with the air pipe of the heating indoor unit; and (c) and (d),
the apparatus for controlling a multi-split air conditioner as set forth in claim 8.
10. A storage medium storing program instructions, characterized in that the program instructions, when executed, perform a method for controlling a multiple split air conditioner according to any one of claims 1 to 7.
CN202211034756.9A 2022-08-26 2022-08-26 Method and device for controlling multi-split air conditioner and multi-split air conditioner Pending CN115342492A (en)

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CN202211034756.9A CN115342492A (en) 2022-08-26 2022-08-26 Method and device for controlling multi-split air conditioner and multi-split air conditioner
PCT/CN2023/109634 WO2024041302A1 (en) 2022-08-26 2023-07-27 Method and device for controlling multi-split air conditioner and multi-split air conditioner

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KR101533703B1 (en) * 2008-09-30 2015-07-03 엘지전자 주식회사 Multi-type air conditioner and Control method of the same
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CN115342492A (en) * 2022-08-26 2022-11-15 青岛海尔中央空调有限公司 Method and device for controlling multi-split air conditioner and multi-split air conditioner

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* Cited by examiner, † Cited by third party
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WO2024041302A1 (en) * 2022-08-26 2024-02-29 青岛海尔中央空调有限公司 Method and device for controlling multi-split air conditioner and multi-split air conditioner

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