CN115183347A - Control method of air conditioning system and air conditioning system - Google Patents

Control method of air conditioning system and air conditioning system Download PDF

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Publication number
CN115183347A
CN115183347A CN202210705356.XA CN202210705356A CN115183347A CN 115183347 A CN115183347 A CN 115183347A CN 202210705356 A CN202210705356 A CN 202210705356A CN 115183347 A CN115183347 A CN 115183347A
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CN
China
Prior art keywords
way valve
indoor unit
conditioning system
temperature
inlet temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210705356.XA
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Chinese (zh)
Inventor
高强
王河坡
许磊
张晓迪
吕俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN202210705356.XA priority Critical patent/CN115183347A/en
Publication of CN115183347A publication Critical patent/CN115183347A/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
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • 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
    • F24F11/56—Remote control
    • 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
    • F24F11/70—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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F24F2110/20—Humidity
    • 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

Abstract

The invention relates to the technical field of air conditioners, and particularly provides a control method of an air conditioning system and the air conditioning system. In order to solve the problem of air conditioning system failure caused by miswiring of a plurality of four-way valves of the existing air conditioning system, the control method of the air conditioning system comprises the following steps: controlling the heating operation of the air conditioning system, and opening a first expansion valve and a second expansion valve; sending a signal of electrifying the four-way valve to a first signal line; judging whether the indoor unit of the air conditioner operates normally; when the air conditioner indoor unit does not normally operate, acquiring a first condenser inlet temperature and a first coil inlet temperature; and if the difference value between the inlet temperature of the first coil and the inlet temperature of the first condenser is larger than a first preset temperature, acquiring the information of the connection of a first signal line and a second four-way valve, and acquiring the information of the connection of a second signal line and a first four-way valve. After the information of the wrong wiring of the four-way valve is obtained, the stored instruction is corrected, so that the air conditioning system can still normally operate under the condition of wrong wiring of the four-way valve.

Description

Control method of air conditioning system and air conditioning system
Technical Field
The invention relates to the technical field of multi-split air conditioners, and particularly provides an air conditioner control method and an air conditioner system.
Background
With the improvement of living standard, one-driving-more central air conditioner is favored by more and more families, and faults often occur in the heating operation of an air conditioning system, so that an indoor unit of the air conditioner blows cold air to cause complaints of users. After detection, the abnormal operation of the indoor unit and the outdoor unit is caused by the miswiring of a plurality of four-way valves of the air conditioning system, and corresponding prevention and detection means are not carried out in the program of the indoor unit and the outdoor unit of the air conditioner aiming at the problem, so that the air conditioning system can not be normally heated and operated after an installer of the air conditioning system has wrong wiring of an air conditioning line. Specifically, in the prior art, four-way valves of an air conditioning system are respectively connected with signal lines for control, for example, a first signal line is connected with a first four-way valve, a second signal line is connected with a second four-way valve, and once the four-way valves are miswired, the first signal line is connected with the second four-way valve, so that signals cannot correctly control the corresponding four-way valves, which causes that an indoor unit of the air conditioner cannot normally heat, and further seriously affects the operation of the air conditioning system.
Accordingly, there is a need in the art for a new control method for an air conditioning system to solve the problem of air conditioning system failure caused by miswiring of a plurality of four-way valves of an existing air conditioning system.
Disclosure of Invention
The invention aims to solve the technical problem, namely, the problem of air-conditioning system failure caused by miswiring of a plurality of four-way valves of the existing air-conditioning system is solved.
In a first aspect, the present invention provides a control method for an air conditioning system, where the air conditioning system includes a first refrigerant circulation loop, and a compressor, a second four-way valve, an outdoor heat exchanger, a first expansion valve, an air conditioning indoor unit, and a first four-way valve are sequentially disposed on the first refrigerant circulation loop, so that the first refrigerant circulation loop can perform indoor cooling and heating; the air-conditioning system also comprises a first refrigerant pipeline, one end of the first refrigerant pipeline is arranged between the outdoor heat exchanger and the indoor unit of the air conditioner on the first refrigerant circulation loop, the other end of the first refrigerant pipeline is connected with the second four-way valve, and the first refrigerant pipeline is provided with a first heat exchanger and a second expansion valve; the control method comprises the following steps: controlling the heating operation of the air conditioning system, and opening the first expansion valve and the second expansion valve; sending a signal of electrifying the four-way valve to a first signal line; judging whether the indoor unit of the air conditioner operates normally or not; when the indoor unit of the air conditioner does not normally operate, acquiring a first condenser inlet temperature and a first coil inlet temperature; and if the difference value between the inlet temperature of the first coil pipe and the inlet temperature of the first condenser is larger than a first preset temperature, acquiring information of connection between the first signal line and the second four-way valve, and acquiring information of connection between the second signal line and the first four-way valve.
In a preferred technical solution of the control method of the air conditioning system, after the step of "obtaining a first condenser inlet temperature and a first coil inlet temperature when the indoor unit of the air conditioner is not operating normally", the control method includes: if the difference value between the inlet temperature of the first coil and the inlet temperature of the first condenser is less than or equal to a first preset temperature, sending a signal of electrifying the four-way valve to a first signal line, and sending a signal of electrifying the four-way valve to a second signal line; judging whether the indoor unit of the air conditioner operates normally again; and when the indoor unit of the air conditioner normally operates, acquiring information that the second signal wire is connected with the first four-way valve, information that the first signal wire is connected with the second four-way valve, and information that the second four-way valve has a fault.
In a preferred embodiment of the control method of the air conditioning system, after the step of "re-determining whether the indoor unit of the air conditioner is operating normally", the control method includes: when the indoor unit of the air conditioner does not normally operate; acquiring the inlet temperature of a second condenser and the inlet temperature of a second coil; and if the difference value between the inlet temperature of the second coil and the inlet temperature of the second condenser is greater than a first preset temperature, the second signal line is connected with the second four-way valve, the first signal line is connected with the first four-way valve, and the first four-way valve fails.
In a preferred technical solution of the control method of the air conditioning system, when the indoor unit of the air conditioner is not normally operated; then after the step of obtaining a second condenser inlet temperature and a second coil inlet temperature ", the control method further comprises: and if the difference value between the inlet temperature of the second coil pipe and the inlet temperature of the second condenser is less than or equal to a first preset temperature, acquiring the information of the fault of the first four-way valve and the information of the fault of the second four-way valve.
In a preferred embodiment of the control method of the air conditioning system, after the step of sending a signal for powering on the four-way valve to the first signal line, the control method includes: and when the indoor unit of the air conditioner normally operates, acquiring information of connection between the first signal line and the first four-way valve, and information of connection between the second signal line and the second four-way valve.
In a preferred embodiment of the above method for controlling an air conditioning system, after the step of "obtaining information that the first signal line is connected to the second four-way valve and the second signal line is connected to the first four-way valve if a difference between an inlet temperature of the first coil and an inlet temperature of the first condenser is greater than a first preset temperature", the method for controlling an air conditioning system includes: and correcting the stored instruction according to the obtained connection information of each signal line and each four-way valve.
In a preferable embodiment of the control method of the air conditioning system, the control method further includes: and when the fault information of each four-way valve is obtained, controlling the air-conditioning system to stop.
In a preferred embodiment of the control method of the air conditioning system, the step of determining whether the indoor unit of the air conditioner is operating normally further includes: acquiring the inlet pipe temperature of an indoor unit of an air conditioner, the outlet pipe temperature of the indoor unit of the air conditioner and the ambient temperature; when the inlet pipe temperature of the air-conditioning indoor unit is higher than the ambient temperature and the outlet pipe temperature of the air-conditioning indoor unit is higher than the ambient temperature, the air-conditioning indoor unit normally operates; and when the inlet pipe temperature of the air-conditioning indoor unit is less than or equal to the ambient temperature and the outlet pipe temperature of the air-conditioning indoor unit is less than or equal to the ambient temperature, the air-conditioning indoor unit does not normally operate.
In a preferred technical solution of the control method of the air conditioning system, a first temperature sensor is disposed between the outdoor heat exchanger and the second four-way valve on the first refrigerant circulation loop, and a second temperature sensor is disposed between the first heat exchanger and the second four-way valve on the first refrigerant pipeline; the first condenser inlet temperature is measured by the first temperature sensor; the first coil inlet temperature is measured by the second temperature sensor.
In a second aspect, the present invention also provides an air conditioning system comprising a processor configured to be able to perform the control method of the air conditioning system according to any of the above-mentioned technical solutions.
As can be understood by those skilled in the art, the air conditioning system of the present invention includes a first refrigerant circulation loop, on which a compressor, a second four-way valve, an outdoor heat exchanger, a first expansion valve, an air conditioning indoor unit and a first four-way valve are sequentially disposed, so that the first refrigerant circulation loop can refrigerate and heat indoors; the air conditioning system also comprises a first refrigerant pipeline, one end of the first refrigerant pipeline is arranged between the outdoor heat exchanger and the indoor unit of the air conditioner on the first refrigerant circulation loop, the other end of the first refrigerant pipeline is connected with the second four-way valve, and the first refrigerant pipeline is provided with a first heat exchanger and a second expansion valve; the control method of the air conditioning system comprises the following steps: controlling the heating operation of the air conditioning system, and opening a first expansion valve and a second expansion valve; sending a signal of electrifying the four-way valve to a first signal line; judging whether the indoor unit of the air conditioner operates normally; when the air conditioner indoor unit does not normally operate, acquiring a first condenser inlet temperature and a first coil inlet temperature; and if the difference value between the inlet temperature of the first coil and the inlet temperature of the first condenser is larger than a first preset temperature, acquiring the information of the connection of a first signal line and a second four-way valve, and acquiring the information of the connection of a second signal line and a first four-way valve.
Under the condition of adopting the technical scheme, the air conditioning system is controlled to heat, the first expansion valve and the second expansion valve are started, the first refrigerant circulation loop heats the indoor space, a signal of electrifying the four-way valve is sent to the first signal line, whether the indoor unit of the air conditioner normally operates is judged, when the indoor unit of the air conditioner does not normally operate, the first four-way valve is powered off, the first four-way valve is not successfully reversed, the condition of wrong wiring is possibly existed, then the inlet temperature of the first condenser and the inlet temperature of the first coil pipe are obtained, if the difference value between the inlet temperature of the first coil pipe and the inlet temperature of the first condenser is larger than the first preset temperature, the second four-way valve is electrified and successfully reversed, the information of the connection between the first signal line and the second four-way valve is obtained, and the information of the connection between the second signal line and the first four-way valve is obtained. When the first four-way valve is powered off and the second four-way valve is powered on, the first four-way valve is communicated with dc and es; and the high-temperature and high-pressure refrigerant discharged by the compressor enters the first refrigerant pipeline through the second four-way valve, is liquefied after exchanging heat with the first heat exchanger on the first refrigerant pipeline, enters the outdoor heat exchanger for further liquefaction after passing through the second expansion valve, and then returns to the compressor through the second four-way valve, the inlet temperature of the first coil pipe is higher, the inlet temperature of the first condenser is lower, and the indoor unit of the air conditioner cannot heat indoors. After the connection information of the signal wire and the four-way valve is obtained, the opening of the first four-way valve in the subsequent instructions can be automatically changed into the opening of the second four-way valve by modifying the stored instructions, so that the air conditioning system can still normally operate under the condition of wrong wiring, or the connection of the four-way valve and the signal wire can be manually corrected by technicians.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a schematic view illustrating a refrigerant flow direction when a first refrigerant circulation circuit of an air conditioning system heats;
FIG. 2 is a schematic diagram of a refrigerant flow direction when a first four-way valve of the air conditioning system of the present invention is powered off and a second four-way valve is powered on;
FIG. 3 is a schematic diagram of a refrigerant flow direction when a second four-way valve is powered off when a first four-way valve of the air conditioning system of the present invention is powered on;
FIG. 4 is a schematic diagram of the flow direction of the refrigerant when the first four-way valve of the air conditioning system of the present invention is powered off and the second four-way valve is powered off;
FIG. 5 is a flow chart of the main steps of the control method of the air conditioning system of the present invention;
fig. 6 is a flowchart illustrating steps of one embodiment of a method for controlling an air conditioning system according to the present invention.
List of reference numerals:
1. a first refrigerant circulation circuit; 11. a compressor; 12. a second four-way valve; 13. an outdoor heat exchanger; 14. a first expansion valve; 15. an air-conditioning indoor unit; 16. a first four-way valve; 2. a first refrigerant pipeline; 21. a first heat exchanger; 22. a second expansion valve; 23. a circulating water pipe; 24. a floor heating pipeline; 3. a first temperature sensor; 4. a second temperature sensor; 5. a third temperature sensor; 6. a fourth temperature sensor.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.
It should be noted that the terms "first" and "second" in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In order to solve the problem of air conditioning system failure caused by miswiring of a plurality of four-way valves of the existing air conditioning system, referring to fig. 1, the air conditioning system comprises a first refrigerant circulation loop 1, wherein a compressor 11, a second four-way valve 12, an outdoor heat exchanger 13, a first expansion valve 14, an air conditioning indoor unit 15 and a first four-way valve 16 are sequentially arranged on the first refrigerant circulation loop 1, so that the first refrigerant circulation loop 1 can perform indoor refrigeration and heating; referring to fig. 2, the air conditioning system further includes a first refrigerant pipeline 2, one end of the first refrigerant pipeline 2 is disposed between the outdoor heat exchanger 13 and the indoor unit 15 of the air conditioner on the first refrigerant circulation loop 1, the other end is connected to the second four-way valve 12, and the first refrigerant pipeline 2 is provided with a first heat exchanger 21 and a second expansion valve 22; referring to fig. 5, the control method of the air conditioning system includes:
step S01: controlling the heating operation of the air conditioning system, and opening a first expansion valve and a second expansion valve;
step S02: sending a signal of electrifying the four-way valve to a first signal line;
step S03: judging whether the indoor unit of the air conditioner operates normally;
step S04: when the air conditioner indoor unit does not normally operate, acquiring a first condenser inlet temperature and a first coil inlet temperature;
step S05: and if the difference value between the inlet temperature of the first coil and the inlet temperature of the first condenser is larger than a first preset temperature, acquiring the information of the connection of a first signal line and a second four-way valve, and acquiring the information of the connection of a second signal line and a first four-way valve.
Controlling the heating operation of the air conditioning system, starting a first expansion valve 14 and a second expansion valve 22, wherein a first refrigerant circulation loop is used for indoor heating, sending a signal of electrifying a four-way valve to a first signal line, then judging whether the indoor unit 15 of the air conditioner operates normally, when the indoor unit 15 of the air conditioner does not operate normally, the first four-way valve 16 is powered off, the first four-way valve 16 does not switch successfully, the condition of wrong wiring is possible, then acquiring the inlet temperature of a first condenser and the inlet temperature of the first coil, and if the difference value between the inlet temperature of the first coil and the inlet temperature of the first condenser is greater than a first preset temperature, the second four-way valve 12 is electrified and the switch successfully, and acquiring the information of connecting the first signal line and the second four-way valve 12, and the information of connecting the second signal line and the first four-way valve 16.
Referring to FIG. 2, when the first four-way valve 16 is powered down and the second four-way valve 12 is powered up, the dc of the first four-way valve 16 is communicated and the es is communicated; the de of the second four-way valve 12 is communicated, the cs is communicated, the high-temperature and high-pressure refrigerant discharged by the compressor 11 enters the first refrigerant pipeline 2 through the second four-way valve 12, is liquefied after exchanging heat with the first heat exchanger 21 on the first refrigerant pipeline 2, enters the outdoor heat exchanger 13 for further liquefaction after passing through the second expansion valve 22, and then returns to the compressor 11 through the second four-way valve 12, so that the inlet temperature of the first coil is higher, the inlet temperature of the first condenser is lower, and the indoor unit 15 of the air conditioner cannot heat indoors. After the connection information between the signal line and the four-way valve is obtained, the opening of the first four-way valve 16 in the subsequent instruction can be automatically changed into the opening of the second four-way valve 12 by modifying the stored instruction, so that the air conditioning system can still normally operate under the condition of wrong wiring, or the connection between the four-way valve and the signal line can be manually corrected by a technician.
Referring to fig. 2, a first temperature sensor 3 is disposed between the outdoor heat exchanger 13 and the second four-way valve 12 in the first refrigerant circulation circuit 1, and a second temperature sensor 4 is disposed between the first heat exchanger 21 and the second four-way valve 12 in the first refrigerant pipeline 2; the first condenser inlet temperature is measured by a first temperature sensor 3; the first coil inlet temperature is measured by the second temperature sensor 4. In addition, the first preset temperature may be set to 5 ℃ or 4 ℃, and the like, so the value of the first preset temperature is not particularly limited, and may be set by a person skilled in the art as needed.
In a possible embodiment, referring to fig. 1, the air conditioning system of the present invention includes a first refrigerant circulation circuit 1, wherein a compressor 11, a second four-way valve 12, an outdoor heat exchanger 13, a first expansion valve 14, an air conditioning indoor unit 15, and a first four-way valve 16 are sequentially disposed on the first refrigerant circulation circuit 1, so that the first refrigerant circulation circuit 1 can cool and heat the room; referring to fig. 2, the air conditioning system further includes a first refrigerant pipeline 2, one end of the first refrigerant pipeline 2 is arranged between an outdoor heat exchanger 13 and an air conditioning indoor unit 15 on the first refrigerant circulation loop 1, the other end of the first refrigerant pipeline is connected with a second four-way valve 12, the first refrigerant pipeline 2 is provided with a first heat exchanger 21 and a second expansion valve 22, the first heat exchanger 21 is arranged between the second expansion valve 22 and the second four-way valve 12, the first heat exchanger 21 is provided with a circulating water pipe 23, the circulating water pipe 23 is connected with a floor heating pipeline 24, and the first refrigerant pipeline 2 and the circulating water pipe 23 exchange heat through the first heat exchanger 21;
referring to fig. 6, the control method of the air conditioning system includes:
step S11: controlling the heating operation of the air conditioning system, and opening a first expansion valve and a second expansion valve;
step S12: sending a signal of electrifying the four-way valve to a first signal line;
step S13: judging whether the indoor unit of the air conditioner operates normally;
step S14: when the indoor unit of the air conditioner normally operates, acquiring information of connection between a first signal line and a first four-way valve, and information of connection between a second signal line and a second four-way valve;
step S15: when the air conditioner indoor unit does not normally operate, acquiring a first condenser inlet temperature and a first coil inlet temperature;
step S161: and if the difference value between the inlet temperature of the first coil and the inlet temperature of the first condenser is larger than a first preset temperature, acquiring the information of the connection of a first signal line and a second four-way valve, and acquiring the information of the connection of a second signal line and a first four-way valve.
Controlling the heating operation of the air conditioning system, starting the first expansion valve 14 and the second expansion valve 22, then sending a signal of powering on the four-way valve to the first signal line, if the indoor unit 15 of the air conditioner operates normally, indicating that the first four-way valve 16 is powered on and the reversing is successful, the first signal line is connected with the first four-way valve 16, and further, the second signal line is connected with the second four-way valve 12. Referring to fig. 3, when the first four-way valve 16 is powered on and the second four-way valve 12 is powered off, de of the first four-way valve 16 is communicated and cs is communicated; the high-temperature and high-pressure refrigerant discharged by the compressor 11 enters the air-conditioning indoor unit 15 through the first four-way valve 16 to be liquefied after being discharged heat, then sequentially passes through the second expansion valve 22, the first heat exchanger 21 and the second four-way valve 12 and then returns to the compressor 11, the other part of the high-temperature and high-pressure refrigerant enters the first refrigerant pipeline 2 through the second four-way valve 12 and the outdoor heat exchanger 13 and then returns to the compressor 11 through the second expansion valve 22, the first heat exchanger 21 and the second four-way valve 12, the air-conditioning indoor unit 15 can normally perform indoor heating, and the floor heating cannot normally perform heating.
If the indoor unit 15 of the air conditioner does not normally operate, it indicates that the first four-way valve 16 is powered off, the first four-way valve 16 is wrongly wired and cannot successfully commutate, and then the inlet temperature of the first condenser and the inlet temperature of the first coil are obtained, if the difference value between the inlet temperature of the first coil and the inlet temperature of the first condenser is larger than a first preset temperature, it indicates that the second four-way valve 12 is successfully powered on and commutates, and then the information that the first signal wire is connected with the second four-way valve 12 and the information that the second signal wire is connected with the first four-way valve 16 are obtained. Referring to FIG. 2, when the first four-way valve 16 is powered down and the second four-way valve 12 is powered up, the dc of the first four-way valve 16 is communicated and the es is communicated; the de communication and the cs communication of the second four-way valve 12 are performed, a high-temperature and high-pressure refrigerant discharged by the compressor 11 enters the first refrigerant pipeline 2 through the second four-way valve 12, is liquefied after heat exchange with the first heat exchanger 21 on the first refrigerant pipeline 2, enters the outdoor heat exchanger 13 for further liquefaction after passing through the second expansion valve 22, and then returns to the compressor 11 through the second four-way valve 12, so that the inlet temperature of the first coil is high, the inlet temperature of the first condenser is low, the indoor unit 15 of the air conditioner cannot perform indoor heating, and the floor heating can perform normal heating.
Step S13 further includes the steps of:
acquiring the inlet pipe temperature of an indoor unit of an air conditioner, the outlet pipe temperature of the indoor unit of the air conditioner and the ambient temperature;
when the inlet pipe temperature of the air-conditioning indoor unit is higher than the ambient temperature and the outlet pipe temperature of the air-conditioning indoor unit is higher than the ambient temperature, the air-conditioning indoor unit normally operates;
and when the inlet pipe temperature of the air-conditioning indoor unit is less than or equal to the ambient temperature and the outlet pipe temperature of the air-conditioning indoor unit is less than or equal to the ambient temperature, the air-conditioning indoor unit does not normally operate.
Referring to fig. 2, the temperature of the inlet pipe of the indoor unit of the air conditioner and the temperature of the outlet pipe of the indoor unit of the air conditioner are respectively measured by a third temperature sensor 5 and a fourth temperature sensor 6 which are arranged on the refrigerant inlet and outlet pipe of the indoor unit of the air conditioner. In addition, whether the indoor unit 15 of the air conditioner is normally operated or not, that is, whether the indoor unit is normally heated or not may be determined in other manners, for example, by detecting the ambient temperatures before and after the indoor unit 15 of the air conditioner is turned on, and if the ambient temperature after the indoor unit 15 of the air conditioner is turned on is greater than the ambient temperature before the indoor unit 15 of the air conditioner is turned on, it can be said that the indoor unit 15 of the air conditioner is normally operated or normally heated, so the specific manner of determining whether the indoor unit 15 of the air conditioner is normally operated or not is not limited, and a person skilled in the art can set the method according to needs.
With continuing reference to fig. 6, further, after step S15, the control method further includes:
step S1621: if the difference value between the inlet temperature of the first coil pipe and the inlet temperature of the first condenser is less than or equal to a first preset temperature, sending a signal for electrifying the four-way valve to the first signal line, and sending a signal for electrifying the four-way valve to the second signal line;
step S1622: judging whether the indoor unit of the air conditioner operates normally again;
step S1623: when the indoor unit of the air conditioner normally operates, the information that the second signal line is connected with the first four-way valve, the information that the first signal line is connected with the second four-way valve and the information that the second four-way valve has faults are obtained.
Further, referring to fig. 2, if the difference between the inlet temperature of the first coil and the inlet temperature of the first condenser is less than or equal to a first preset temperature, it is indicated that the second four-way valve 12 is not successfully switched, that is, the second four-way valve 12 is powered off, then a signal of powering on the four-way valve is sent to both the first signal line and the second signal line, whether the indoor unit 15 of the air conditioner is normally operated is re-determined, if the indoor unit 15 of the air conditioner is normally operated, it is indicated that the powering on of the first four-way valve 16 is successfully switched, the second signal line is connected to the first four-way valve 16, and it can be known that the first signal line is connected to the second four-way valve 12, but since the signal of powering on the four-way valve is sent to the first signal line, the second four-way valve 12 is not switched, and it can be known that a fault occurs in the second four-way valve 12, and a technician needs to perform maintenance.
With continued reference to fig. 6, further, after step S1622, the control method further includes:
step S1624: when the air conditioner indoor unit does not normally operate; acquiring the inlet temperature of a second condenser and the inlet temperature of a second coil;
step S1625: if the difference value between the inlet temperature of the second coil pipe and the inlet temperature of the second condenser is larger than a first preset temperature, the information of the connection of a second signal line and a second four-way valve, the information of the connection of a first signal line and a first four-way valve and the information of the fault of the first four-way valve are obtained;
step S1626: and if the difference value between the inlet temperature of the second coil pipe and the inlet temperature of the second condenser is less than or equal to a first preset temperature, acquiring the information of the fault of the first four-way valve and the information of the fault of the second four-way valve.
Further, referring to fig. 2 and 6, after the indoor unit 15 of the air conditioner is judged again to be normally operated, if the indoor unit 15 of the air conditioner is still not normally operated, the inlet temperature of the second condenser and the inlet temperature of the second coil are obtained, if the difference value between the inlet temperature of the second coil and the inlet temperature of the second condenser is greater than a first preset temperature, it is described that the second four-way valve 12 is successfully powered on and reversed, and then the information that the second signal line is connected with the second four-way valve 12 is obtained, and the information that the first signal line is connected with the first four-way valve 16 is obtained, and since the first four-way valve 16 is not reversed after the signal that the four-way valve is powered on is sent to the first signal line, it can be known that the first four-way valve 16 has a fault and needs to be maintained.
If the difference between the inlet temperature of the second coil and the inlet temperature of the second condenser is less than or equal to a first preset temperature, the first four-way valve 16 and the second four-way valve 12 are not reversed and are powered off, and the information of the fault of the first four-way valve 16 and the information of the fault of the second four-way valve 12 are obtained. Referring to fig. 4, the first four-way valve 16 is powered off, the second four-way valve 12 is powered off, the first four-way valve 16 is in dc communication, the second four-way valve 12 is in dc communication, the second four-way valve 16 is in es communication, the high-temperature and high-pressure refrigerant discharged by the compressor 11 is liquefied after passing through the second four-way valve 12 and exchanging heat with the outdoor heat exchanger 13 in sequence, one part of the high-temperature and high-pressure refrigerant enters the indoor air conditioner 15, the other part of the high-temperature and high-pressure refrigerant enters the first refrigerant pipeline 2, the part of the high-temperature and high-pressure refrigerant entering the indoor air conditioner 15 absorbs heat and then returns to the compressor 11 through the first four-way valve 16, and part of the refrigerant entering the first refrigerant pipeline 2 returns to the compressor 11 through the second four-way valve 12 after passing through the second expansion valve 22 and the first heat exchanger 21.
It should be noted that the second condenser inlet temperature is measured by the first temperature sensor 3; the second coil inlet temperature is measured by a second temperature sensor 4.
In any of the above embodiments, after obtaining the connection information of the signal line and the four-way valve and the failure information of the four-way valve, the control method of the air conditioning system further includes the steps of:
correcting the stored instruction according to the obtained connection information of each signal line and each four-way valve;
and when the fault information of the first four-way valve or the second four-way valve is obtained, controlling the air-conditioning system to stop.
After the connection information of the signal wire and the four-way valve is obtained, the stored instruction is corrected according to the obtained connection information of the signal wire and the four-way valve, so that the subsequent instruction automatically changes the opening of the first four-way valve 16 into the opening of the second four-way valve 12, the air conditioning system can still normally operate after the four-way valve is wrongly wired, and the indoor unit 15 of the air conditioner and the floor heating system can normally work without influencing the use of users. In addition, when the failure information of the first four-way valve 16 or the second four-way valve 12 is obtained, the air conditioning system is controlled to stop, and the four-way valve is repaired and replaced according to the failure information.
It should be noted that after the connection information of the signal line and the four-way valve is obtained, a technician can perform manual correction to enable the air conditioning system to operate normally, and the technician in the field can set the correction according to needs.
As mentioned in the first paragraph of this section, the above embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention, and those skilled in the art can make modifications to the above structures so that the present invention can be applied to more specific application scenarios without departing from the principle of the present invention.
Furthermore, the invention also provides an air conditioning system comprising a processor configured to perform the control method of the air conditioning system described in any of the above embodiments.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (10)

1. The control method of the air conditioning system is characterized in that the air conditioning system comprises a first refrigerant circulation loop, and a compressor, a second four-way valve, an outdoor heat exchanger, a first expansion valve, an air conditioning indoor unit and a first four-way valve are sequentially arranged on the first refrigerant circulation loop, so that the first refrigerant circulation loop can perform indoor refrigeration and heating;
the air conditioning system also comprises a first refrigerant pipeline, one end of the first refrigerant pipeline is arranged between the outdoor heat exchanger and the indoor unit of the air conditioner on the first refrigerant circulation loop, the other end of the first refrigerant pipeline is connected with the second four-way valve, and the first refrigerant pipeline is provided with a first heat exchanger and a second expansion valve; the control method comprises the following steps:
controlling the heating operation of the air conditioning system, and opening the first expansion valve and the second expansion valve;
sending a signal of electrifying the four-way valve to a first signal line;
judging whether the indoor unit of the air conditioner operates normally or not;
when the indoor unit of the air conditioner does not normally operate, acquiring a first condenser inlet temperature and a first coil inlet temperature;
and if the difference value between the inlet temperature of the first coil pipe and the inlet temperature of the first condenser is larger than a first preset temperature, acquiring the information of the connection of the first signal line and the second four-way valve, and acquiring the information of the connection of the second signal line and the first four-way valve.
2. The control method of an air conditioning system according to claim 1, wherein after the step of obtaining the first condenser inlet temperature and the first coil inlet temperature when the indoor unit of the air conditioner is not normally operated, the control method comprises:
if the difference value between the inlet temperature of the first coil and the inlet temperature of the first condenser is less than or equal to a first preset temperature, sending a signal of electrifying the four-way valve to a first signal line, and sending a signal of electrifying the four-way valve to a second signal line;
judging whether the indoor unit of the air conditioner operates normally again;
and when the indoor unit of the air conditioner normally operates, acquiring information that the second signal wire is connected with the first four-way valve, information that the first signal wire is connected with the second four-way valve, and information that the second four-way valve has a fault.
3. The control method of the air conditioning system according to claim 2, wherein after the step of "re-determining whether the indoor unit of the air conditioner is normally operated", the control method comprises:
when the indoor unit of the air conditioner does not normally operate; acquiring the inlet temperature of a second condenser and the inlet temperature of a second coil;
and if the difference value between the inlet temperature of the second coil and the inlet temperature of the second condenser is greater than a first preset temperature, the second signal line is connected with the second four-way valve, the first signal line is connected with the first four-way valve, and the first four-way valve fails.
4. The control method of an air conditioning system according to claim 3, wherein when the indoor unit of the air conditioner is not normally operated; then after the step of obtaining a second condenser inlet temperature and a second coil inlet temperature ", the control method further comprises:
and if the difference value between the inlet temperature of the second coil pipe and the inlet temperature of the second condenser is less than or equal to a first preset temperature, acquiring the information of the fault of the first four-way valve and the information of the fault of the second four-way valve.
5. The control method of an air conditioning system according to claim 1, wherein after the step of "transmitting a signal for power-on of a four-way valve to the first signal line", the control method comprises:
and when the indoor unit of the air conditioner normally operates, acquiring information of connection between the first signal line and the first four-way valve, and information of connection between the second signal line and the second four-way valve.
6. The control method of an air conditioning system as claimed in claim 1, wherein after the step of obtaining information that the first signal line is connected to the second four-way valve and the second signal line is connected to the first four-way valve if a difference between a first coil inlet temperature and a first condenser inlet temperature is greater than a first preset temperature, the control method comprises:
and correcting the stored instruction according to the obtained connection information of each signal line and each four-way valve.
7. The control method of an air conditioning system according to any one of claims 2 to 4, characterized by further comprising:
and when the fault information of each four-way valve is obtained, controlling the air-conditioning system to stop.
8. The method of claim 1, wherein the step of determining whether the indoor unit of the air conditioner is operating normally further comprises:
acquiring the inlet pipe temperature of an indoor unit of an air conditioner, the outlet pipe temperature of the indoor unit of the air conditioner and the ambient temperature;
when the inlet pipe temperature of the air-conditioning indoor unit is higher than the ambient temperature and the outlet pipe temperature of the air-conditioning indoor unit is higher than the ambient temperature, the air-conditioning indoor unit normally operates;
and when the inlet pipe temperature of the air-conditioning indoor unit is less than or equal to the ambient temperature and the outlet pipe temperature of the air-conditioning indoor unit is less than or equal to the ambient temperature, the air-conditioning indoor unit does not normally operate.
9. The control method of an air conditioning system according to claim 1, wherein a first temperature sensor is disposed between the outdoor heat exchanger and the second four-way valve on the first refrigerant circulation circuit, and a second temperature sensor is disposed between the first heat exchanger and the second four-way valve on the first refrigerant pipeline; the first condenser inlet temperature is measured by the first temperature sensor; the first coil inlet temperature is measured by the second temperature sensor.
10. An air conditioning system, characterized in that it comprises a processor arranged to be able to execute the control method of the air conditioning system according to any one of claims 1-9.
CN202210705356.XA 2022-06-21 2022-06-21 Control method of air conditioning system and air conditioning system Pending CN115183347A (en)

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JPH06300397A (en) * 1993-04-14 1994-10-28 Daikin Ind Ltd Freezing preventive device of air conditioner
KR20020038377A (en) * 2000-11-17 2002-05-23 구자홍 4-way valve hindrance sensing device and sensing method of heat-pump air conditioner
JP2005249338A (en) * 2004-03-05 2005-09-15 Mitsubishi Electric Corp Wiring error detecting method for air-conditioner
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