CN111473462A - Error correction control method of air conditioning system and air conditioning system - Google Patents

Error correction control method of air conditioning system and air conditioning system Download PDF

Info

Publication number
CN111473462A
CN111473462A CN202010325763.9A CN202010325763A CN111473462A CN 111473462 A CN111473462 A CN 111473462A CN 202010325763 A CN202010325763 A CN 202010325763A CN 111473462 A CN111473462 A CN 111473462A
Authority
CN
China
Prior art keywords
indoor heat
throttling device
heat exchanger
sub
air conditioning
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.)
Granted
Application number
CN202010325763.9A
Other languages
Chinese (zh)
Other versions
CN111473462B (en
Inventor
李鸿耀
黎顺全
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.)
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
GD Midea Air Conditioning Equipment 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 GD Midea Air Conditioning Equipment Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202010325763.9A priority Critical patent/CN111473462B/en
Publication of CN111473462A publication Critical patent/CN111473462A/en
Application granted granted Critical
Publication of CN111473462B publication Critical patent/CN111473462B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • 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
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve

Abstract

The invention discloses an error correction control method of an air conditioning system and the air conditioning system, wherein the error correction control method comprises the steps of judging whether a main throttling device is connected to a correct interface or not according to a first temperature difference value of an indoor heat exchanger, if not, carrying out error correction to enable the main throttling device to be connected to the correct interface, and if so, entering the next step; and judging whether the interface of the sub-throttling device corresponding to the ith subsystem is connected with the ith sub-throttling device or not according to the second temperature difference of the indoor heat exchanger, and if not, correcting the error. According to the error correction control method of the air conditioning system, whether the main throttling device and the sub throttling device of the air conditioning system are connected to the correct interface or not can be judged through the self-checking mode, the normal operation of the air conditioning system is guaranteed, and the error correction control method is simple and reliable, low in cost and high in error correction efficiency.

Description

Error correction control method of air conditioning system and air conditioning system
Technical Field
The invention relates to the technical field of air conditioners, in particular to an error correction control method of an air conditioning system and the air conditioning system.
Background
In the related art, in a multi-split air conditioning system, a main throttling device for controlling the refrigerant flow of all indoor heat exchangers and a sub-throttling device for controlling the indoor heat exchangers in each subsystem must be connected to correct interfaces to ensure the normal work of the indoor heat exchangers, otherwise, the indoor heat exchangers cannot work normally, and the normal work of the air conditioning system is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an error correction control method for an air conditioning system, which is capable of determining whether interfaces of a main throttling device and a sub-throttling device are correctly connected and performing error correction, and which is simple and reliable, low in cost, and high in efficiency.
Another object of the present invention is to provide an air conditioning system.
According to the error correction control method of the air conditioning system of the embodiment of the first aspect of the present invention, the air conditioning system includes a compressor, a reversing device, an outdoor heat exchanger, a main throttle device, N indoor heat exchangers, and a parallel flow path, the compressor has an exhaust port and a return port, the reversing device has a first valve port, a second valve port, a third valve port, and a fourth valve port, the first valve port is connected to the exhaust port, the second valve port is connected to the return port, the third valve port is connected to one end of the outdoor heat exchanger, one end of the main throttle device is connected to the other end of the outdoor heat exchanger, the N indoor heat exchangers are connected in parallel between the main throttle device and the fourth valve port, the outdoor heat exchangers are respectively connected to the N indoor units to form N sub-systems, the indoor heat exchanger in the i-th sub-system is the i-th indoor heat exchanger, each subsystem is provided with a sub-throttling device, the sub-throttling device in the ith subsystem is an ith sub-throttling device, wherein N is a positive integer, i is 1, 2 and 3 … … N, the parallel flow paths are connected in parallel at two ends of the main throttling device, the parallel flow paths are provided with control valves,
the error correction control method comprises the following steps:
s10: the air conditioning system enters a self-checking mode;
s20: detecting whether the primary throttling device is connected to the correct interface:
s21: the method comprises the steps of running a refrigeration mode, starting a first preset windshield, opening a control valve and opening a main throttling device to a first opening degree;
s22: sequentially detecting the 1 st to the m sub-systems, wherein the detection process of the ith sub-system is as follows: controlling an ith sub-throttling device of the ith subsystem to be opened to a second opening degree, closing other sub-throttling devices except the ith sub-throttling device, obtaining a first temperature value of each indoor heat exchanger, starting the compressor to operate at a first preset frequency, obtaining a second temperature value of each indoor heat exchanger after the compressor is started for a first preset time period, and calculating a first temperature difference value between the first temperature value and the second temperature value, wherein m is a positive integer greater than or equal to 2 and less than or equal to N;
s23: judging whether the main throttling device is connected to a correct interface or not according to the first temperature difference, if not, correcting error to enable the main throttling device to be connected to the correct interface, and if so, entering the next step;
s30: detecting one by one whether the sub-throttling devices of each subsystem are connected to the correct interface:
s31: closing all the sub throttling devices in the air conditioning system, operating a refrigeration mode, opening a second preset damper and opening the main throttling device to a third opening degree;
s32: and acquiring a third temperature value of each indoor heat exchanger, controlling the ith sub-throttling device of the ith subsystem to be started to a fourth angle, starting the compressor to operate at a second preset frequency, acquiring a fourth temperature value of each indoor heat exchanger after the compressor is started for a second preset time, calculating a second temperature difference value between the third temperature value and the fourth temperature value, judging whether the interface of the sub-throttling device corresponding to the ith subsystem is the ith sub-throttling device or not according to the second temperature difference value, and if not, correcting errors.
According to the error correction control method of the air conditioning system, whether the main throttling device and the sub throttling device of the air conditioning system are connected to the correct interface or not can be judged through the self-checking mode, so that when the main throttling device and the sub throttling device are not connected to the correct interface, correction can be carried out timely, the main throttling device and the sub throttling device are connected to the correct interface, normal operation of the air conditioning system is guaranteed, and the error correction control method is simple and reliable, low in cost and high in error correction efficiency.
According to some embodiments of the invention, step S22 includes: respectively judging whether the first temperature difference value of each indoor heat exchanger is greater than or equal to a first preset temperature value; if the first temperature difference value of only one indoor heat exchanger in the N indoor heat exchangers is greater than or equal to the first preset temperature value in the detection process of each subsystem, the main throttling device is connected to a correct interface; if the first temperature difference values of the two indoor heat exchangers are larger than or equal to the first preset temperature value in the detection process of the two subsystems, the interfaces of the sub throttling devices of the indoor heat exchangers, of which the first temperature difference values are larger than or equal to the first preset temperature value, are exchanged with the interfaces of the main throttling device. At this time, the control signal of the interface of the main throttling device can be correctly sent to the main throttling device, and the error correction of the interface of the main throttling device is completed.
According to some embodiments of the invention, in the detection process, when the first temperature difference values of the two indoor heat exchangers are both greater than or equal to a first preset temperature value, the value of the counter is increased by 1, and then the detection of the next subsystem is performed; when the counter value is incremented by 2, error correction is performed and the undetected subsystem is no longer detected.
According to some embodiments of the invention, step S32 includes: and in the detection process of the ith subsystem, respectively judging whether the second temperature difference value of each indoor heat exchanger is greater than or equal to a second preset temperature value, and if the second temperature difference value of one indoor heat exchanger in the N indoor heat exchangers is greater than or equal to the second preset temperature value, corresponding the indoor heat exchanger to the ith indoor heat exchanger corresponding to the ith subsystem.
According to some embodiments of the present invention, in the detection process of the ith subsystem, if the indoor heat exchanger of which the second temperature difference value is greater than or equal to the second preset temperature value is the ith indoor heat exchanger, the interface of the ith sub-throttling device is connected to a correct interface; if the indoor heat exchanger with the second temperature difference value larger than or equal to the second preset temperature value is not the ith indoor heat exchanger, the interface of the sub throttling device corresponding to the indoor heat exchanger with the second temperature difference value larger than or equal to the second preset temperature value is exchanged with the interface of the ith sub throttling device.
According to some embodiments of the invention, error correction is performed by modifying software coding when the main throttle device and/or the sub throttle device is not connected to the correct interface.
According to some embodiments of the invention, between the S20 and the S30, further comprises the step S40: the compressor is shut down for a third preset period of time.
According to some embodiments of the invention, the first temperature difference T1 is [3 ℃, 12 ℃ ] and the second temperature difference T2 is [3 ℃, 12 ℃ ].
According to some embodiments of the invention, the third preset duration t3 is [2min, 6min ].
According to some embodiments of the invention, the first preset duration is [2min, 30min ], and the second preset duration is [2min, 30min ].
According to some embodiments of the invention, the control valve is a check valve, and the check valve is in one-way communication from the outdoor heat exchanger to the subsystem.
An air conditioning system according to an embodiment of a second aspect of the present invention includes: a compressor having a discharge port and a return port; the reversing device is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected with the exhaust port, and the second valve port is connected with the return air port; one end of the outdoor heat exchanger is connected with the third valve port; one end of the main throttling device is connected with the other end of the outdoor heat exchanger; the N indoor heat exchangers are connected between the main throttling device and the fourth valve port in parallel, the outdoor heat exchangers are respectively connected with the N indoor units to form N subsystems, each subsystem is provided with a sub-throttling device, and N is a positive integer; the parallel flow path is connected in parallel to two ends of the main throttling device, the parallel flow path is provided with a control valve and a control module, and the control module controls the air conditioning system to perform self-checking according to the error correction control method of the air conditioning system in the embodiment of the first aspect of the invention.
According to the air conditioning system of the embodiment of the second aspect of the present invention, the error correction control method of the air conditioning system of the embodiment of the first aspect is set to perform self-checking, and whether the main throttling device and the sub-throttling device of the air conditioning system are connected to the correct interface can be judged through the self-checking mode, so that when the main throttling device and the sub-throttling device are not connected to the correct interface, correction is performed in time, and the main throttling device and the sub-throttling device are connected to the correct interface, so that normal operation of the air conditioning system is ensured, and the error correction control method is simple and reliable, low in cost, and high in error correction efficiency.
According to some embodiments of the invention, the heat sink is arranged in series between the main throttling device and the N indoor heat exchangers.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an air conditioning system according to another embodiment of the present invention;
fig. 3 is a control flowchart of an error correction control method of an air conditioning system according to an embodiment of the present invention;
fig. 4 is a control flowchart of an error correction control method of an air conditioning system according to another embodiment of the present invention.
Reference numerals:
an air-conditioning system (100) is provided,
a compressor 1, an exhaust port 11, a return port 12,
a reversing device 2, a first valve port 21, a second valve port 22, a third valve port 23, a fourth valve port 24,
the heat exchanger is composed of an outdoor heat exchanger 3, an indoor heat exchanger 4,
a main throttle 5, a sub throttle 6,
the parallel flow path 7, the control valve 71,
radiator 8, branch box 9.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An error correction control method of an air conditioning system according to an embodiment of the present invention is described below with reference to the accompanying drawings.
According to the error correction control method of the air conditioning system in the embodiment of the first aspect of the present invention, the air conditioning system includes a compressor, a reversing device, an outdoor heat exchanger, a main throttling device, N indoor heat exchangers, and a parallel flow path.
The compressor has a discharge port and a return port. For example, referring to fig. 1, a discharge port is formed at the left end of the compressor and a return port is formed at the right end of the compressor. The reversing device is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, wherein the first valve port is connected with the exhaust port, the second valve port is connected with the air return port, the third valve port is connected with one end (for example, the lower end in the figure 1) of the outdoor heat exchanger, and one end (for example, the right end in the figure 1) of the main throttling device is connected with the other end (for example, the upper end in the figure 1) of the outdoor heat exchanger.
The N indoor heat exchangers are connected in parallel between the main throttling device and the fourth valve port, the outdoor heat exchangers are respectively connected with the N indoor machines to form N subsystems, the indoor heat exchanger in the ith subsystem is an ith indoor heat exchanger, each subsystem is provided with a sub-throttling device, the sub-throttling device in the ith subsystem is an ith sub-throttling device, N is a positive integer, i is 1, 2 and 3 … … N, the parallel flow paths are connected in parallel at two ends of the main throttling device, and the parallel flow paths are provided with control valves. The control valve can be used for controlling the on-off of the parallel flow path.
Optionally, the reversing device is a four-way valve, but is not limited thereto. The reversing device can control the circulating flow direction of the refrigerant flowing out of the compressor. Specifically, when the first valve port and the fourth valve port of the reversing device are communicated and the second valve port and the third valve port of the reversing device are communicated, the exhaust port of the compressor is connected with the indoor heat exchanger and the return port of the compressor is connected with the outdoor heat exchanger, and at the moment, the air conditioning system operates in a heating mode. When the first valve port of the reversing device is communicated with the third valve port and the second valve port of the reversing device is communicated with the fourth valve port, the exhaust port of the compressor is connected with the outdoor heat exchanger, the return air port of the compressor is connected with the indoor heat exchanger, and the air conditioning system operates in a refrigeration mode at the moment.
It should be noted that, the throttling device may have a coil, one end of the coil is installed on the valve body of the throttling device, and can send a pulse to the throttling device to control it to open a certain opening, and the other end of the coil is installed on the interface on the PCB control board of the air conditioner to receive the opening signal of the throttling device sent by the control interface. For example, in some embodiments of the invention, the main throttle and the sub-throttle are electronic expansion valves. One end of a coil of the electronic expansion valve is installed on a valve body of the electronic expansion valve, and the other end of the coil is installed on an interface on a PCB control panel of the air conditioner.
The error correction control method comprises the following steps:
s10: the air conditioning system enters a self-checking mode;
specifically, when the system is in a power-on operation or standby state, the air conditioning system can be controlled to enter an automatic detection mode through a key on the indoor air conditioner or a remote controller of the air conditioner.
S20: it is detected whether the main throttle is connected to the correct interface.
Specifically, it is detected whether the coil of the main throttle is connected to a corresponding interface on the control board. It can be understood that, during the actual connection process, the main throttling device (e.g. the coil of the main throttling device) may be mistakenly connected to the corresponding interface of the sub-throttling device (the coil of the sub-throttling device) on the control board, and at this time, to ensure the normal operation of the air conditioning system, the position of the main throttling device needs to be corrected. The specific detection steps are as follows:
s21: operating a refrigeration mode, starting a first preset windshield, opening a control valve and opening the main throttling device to a first opening degree;
specifically, a first valve port and a third valve port of the reversing device are communicated, a second valve port and a fourth valve port of the reversing device are communicated, the N indoor heat exchangers are controlled to operate a first preset damper, and the control valve is opened to open the main throttling device to a first opening degree. For example, the first preset step may be a high wind shield, so that the air conditioning system can operate quickly and stably, time spent in an error correction process is saved, and error correction efficiency is improved.
The first opening degree may be set according to an actual range of the main throttle device, for example, the maximum opening degree of the main throttle device is P, and the first opening degree may be 0.5P or more. In some embodiments of the present invention, the maximum opening degree of the main throttle device is 500 steps, and the first opening degree may be 480 steps. Therefore, the air conditioning system can be quickly operated to a stable state, and the overall time duration of the error correction control method is shortened.
When the main throttling device is not connected to the correct interface, namely, the sub-throttling device is connected to the interface corresponding to the main throttling device on the control panel, the refrigerant flowing out of the outdoor heat exchanger cannot flow to the subsystem through the main throttling device, and at the moment, the refrigerant can flow to the subsystem through the parallel flow path, so that the air conditioning system can run in a self-checking mode.
S22: sequentially detecting the 1 st to the m sub-systems, wherein the detection process of the ith sub-system is as follows: controlling the ith sub-throttling device of the ith sub-system to be opened to a second opening degree, closing the other sub-throttling devices except the ith sub-throttling device, obtaining a first temperature value of each indoor heat exchanger, starting the compressor to operate at a first preset frequency, obtaining a second temperature value of each indoor heat exchanger after the compressor is started for a first preset time, and calculating a first temperature difference value between the first temperature value and the second temperature value, wherein m is a positive integer which is more than or equal to 2 and less than or equal to N.
That is, after the air conditioning system operates at the first preset frequency for a period of time, the second temperature value of each indoor heat exchanger is obtained. At this time, the second temperature value in the stable operation state of the air conditioning system can be obtained, which is beneficial to improving the accuracy of the error correction control method.
The first temperature value and the second temperature value can be the temperature of the refrigerant at the inlet and the outlet of the indoor heat exchanger or in the pipeline of the indoor heat exchanger. The first temperature value and the second temperature value are temperatures of refrigerants at the same position of the indoor heat exchanger. For example, when the first temperature value is the temperature of the refrigerant at the inlet of the indoor heat exchanger, the second temperature value is also the temperature of the refrigerant at the inlet of the indoor heat exchanger. The second opening degree and the first preset frequency can be set according to actual conditions. For example, the first preset frequency may be an intermediate frequency. In some embodiments of the present invention, the maximum opening degree of the sub throttle device is Pa, and the second opening degree may be equal to or greater than 0.5 Pa. In some embodiments of the present invention, the maximum opening degree of the sub throttle device is 500 steps, and the second opening degree may be 300 steps. Therefore, the refrigerant passing through the sub-throttling device is moderate in quantity, the air conditioning system can rapidly run to a stable state, and the overall time duration of the error correction control method is shortened.
S23: and judging whether the main throttling device is connected to the correct interface or not according to the first temperature difference, if not, correcting the error to enable the main throttling device to be connected to the correct interface, and if so, entering the next step.
Specifically, when the 1 st to m th subsystems are sequentially detected, one subsystem is detected first, and after the subsystem is detected, the next subsystem is detected. In some embodiments of the present invention, during the detection, some of the subsystems may be detected (m is smaller than N at this time), or all of the subsystems may be detected (m is equal to N at this time), as long as it can be determined whether the main throttling device is connected to the correct interface, and when the main throttling device is not connected to the correct interface, the sub-throttling device that erroneously accesses the main throttling device interface is found.
Wherein, when the main throttling device is connected to the correct interface, the self-test program enters the next step. When the main throttling device is not connected to the correct interface, the interface of the sub-throttling device which is wrongly connected to the interface of the main throttling device is exchanged with the interface of the main throttling device, so that the self-checking program enters the next step after the main throttling device is connected to the correct interface.
S30: it is detected one by one whether each sub-throttle is connected to the correct interface.
In particular, it may be detected whether the coil of the sub-throttle is connected to a corresponding interface on the control board. The specific detection steps are as follows:
s31: and closing all the sub-throttling devices in the air conditioning system, operating the refrigeration mode, opening a second preset damper and opening the main throttling device to a third opening degree.
Namely, the opening degrees of all the sub-throttling devices are set to 0 step, the first valve port and the third valve port of the reversing device are communicated, the second valve port and the fourth valve port of the reversing device are communicated, the N indoor heat exchangers are controlled to operate a second preset damper, and the main throttling device is opened to a third opening degree. For example, the second preset step may be a high wind shield, so that the air conditioning system may operate quickly and stably, time spent in an error correction process may be saved, and error correction efficiency may be improved.
The third opening degree can be set according to the actual measuring range of the main throttling device. For example, the maximum opening degree of the main throttle device is P, and the third opening degree is 0.5P or more. In some embodiments of the present invention, the maximum opening degree of the main throttle device is 500 steps, and the third opening degree may be 480 steps. Therefore, the air conditioning system can be quickly operated to a stable state, and the overall time duration of the error correction control method is shortened.
S32: and acquiring a third temperature value of each indoor heat exchanger, controlling the ith sub-throttling device of the ith subsystem to be opened to a fourth temperature, starting the compressor to operate at a second preset frequency, acquiring a fourth temperature value of each indoor heat exchanger after the compressor is started for a second preset time, calculating a second temperature difference value of the third temperature value and the fourth temperature value, judging whether the interface of the sub-throttling device corresponding to the ith subsystem is connected with the ith sub-throttling device or not according to the second temperature difference value, and if not, correcting errors.
That is, after the air conditioning system operates at the second preset frequency for a period of time, the fourth temperature value of each indoor heat exchanger is obtained. At this time, the fourth temperature value in the stable operation state of the air conditioning system can be obtained, which is beneficial to improving the accuracy of the error correction control method. The third temperature value and the fourth temperature value may be temperatures of the refrigerant at an inlet and an outlet of the indoor heat exchanger or in a pipeline of the indoor heat exchanger. The third temperature value and the fourth temperature value are temperatures of refrigerants at the same position of the indoor heat exchanger. For example, when the third temperature value is the temperature of the refrigerant at the inlet of the indoor heat exchanger, the fourth temperature value is also the temperature of the refrigerant at the inlet of the indoor heat exchanger.
The fourth opening and the second preset frequency can be set according to actual conditions. For example, the second preset frequency may be an intermediate frequency. In some embodiments of the present invention, the maximum opening degree of the sub throttle device is Pa, and the fourth opening degree may be equal to or greater than 0.5 Pa. In some embodiments of the present invention, the maximum opening degree of the sub throttle device may be 500 steps, and the fourth opening degree may be 300 steps. Therefore, the refrigerant passing through the sub-throttling device is moderate in quantity, the air conditioning system can rapidly run to a stable state, and the overall time duration of the error correction control method is shortened.
After each subsystem is detected one by one and error correction is completed, the air conditioning system can be controlled to exit from the self-checking mode.
According to the error correction control method of the air conditioning system, whether the main throttling device and the sub throttling device of the air conditioning system are connected to the correct interface or not can be judged through the self-checking mode, so that when the main throttling device and the sub throttling device are not connected to the correct interface, correction can be carried out timely, the main throttling device and the sub throttling device are connected to the correct interface, normal operation of the air conditioning system is guaranteed, and the error correction control method is simple and reliable, low in cost and high in error correction efficiency.
According to some embodiments of the invention, step S22 includes: when the subsystem is detected, whether the first temperature difference value of each indoor heat exchanger is larger than or equal to a first preset temperature value or not is judged respectively. If the first temperature difference value of only one indoor heat exchanger in the N indoor heat exchangers is greater than or equal to a first preset temperature value in the detection process of each subsystem, the main throttling device is connected to a correct interface; if the first temperature difference values of the two indoor heat exchangers are larger than or equal to a first preset temperature value in the detection process of the two subsystems, the interfaces of the sub throttling devices of the indoor heat exchangers, of which the first temperature difference values are larger than or equal to the first preset temperature value, are exchanged with the interfaces of the main throttling device. Therefore, whether the main throttling device is connected to the correct interface or not can be accurately and efficiently judged, the correct interface of the main throttling device can be accurately and efficiently found when the main throttling device is not connected to the correct interface, and the efficiency of the error correction control method is improved.
That is to say, when the phenomenon that the first temperature difference values of the two indoor heat exchangers are both greater than or equal to the first preset temperature value occurs for a plurality of times, it can be determined that the interface of the sub-throttling device of the indoor heat exchanger, in which the first temperature difference value is greater than or equal to the first preset temperature value repeatedly occurs for the plurality of times, is connected with the main throttling device. At this time, after the interface of the sub-throttling device of the indoor heat exchanger, in which the first temperature difference value is greater than or equal to the first preset temperature value, is repeatedly exchanged with the interface of the main throttling device, the main throttling device can be connected to the correct interface.
In some embodiments of the present invention, during the detection process, the 1 st to nth sub-throttling devices may be sequentially turned on for determination.
For example, first, the 1 st sub-throttling device of the 1 st sub-system is opened, the byte-throttling devices of the 2 nd to N th sub-systems are closed, the first temperature value Ta1 (the first temperature of the 1 st indoor heat exchanger), Ta2 (the first temperature of the 2 nd indoor heat exchanger), … … TaN (the first temperature of the nth indoor heat exchanger) of each indoor heat exchanger is obtained, after the compressor operates at the first preset frequency for the first preset time period, the second temperature value Tb1 (the second temperature of the 1 st indoor heat exchanger), Tb2 (the second temperature of the 2 nd indoor heat exchanger), … … TbN (the second temperature of the nth indoor heat exchanger) of each indoor heat exchanger is obtained, Ta1 and Tb1, Ta2 and Tb2, and … … TaN and TbN are respectively compared, the first temperature difference value of each indoor heat exchanger is obtained, and the first temperature difference value of several indoor heat exchangers is compared to be greater than or equal to the first preset temperature value.
And then opening the 2 nd sub-throttling device of the 2 nd sub-system, closing the other sub-throttling devices, repeating the detection method of the 1 st sub-system, obtaining the first temperature difference value of each indoor heat exchanger, and comparing that the first temperature difference values of the indoor heat exchangers are larger than or equal to a first preset temperature value.
And then respectively opening 3 rd, 4 th and … … N sub-throttling devices of the 3 rd, 4 th and … … th sub-systems, closing the rest sub-throttling devices when opening the 3 rd, 4 th and … … N sub-throttling devices, acquiring a first temperature difference value of each indoor heat exchanger, and comparing that the first temperature difference values of the indoor heat exchangers are more than or equal to a first preset temperature value.
And if the first temperature difference value of only one indoor heat exchanger is greater than or equal to a first preset temperature value in the detection process of all the subsystems, judging that the main throttling device is connected to a correct interface.
If the first temperature difference values of the two indoor heat exchangers are larger than or equal to a first preset temperature value in the detection process of the two subsystems, the interfaces of the sub throttling devices of the indoor heat exchangers, of which the first temperature difference values are larger than or equal to the first preset temperature value, are repeatedly exchanged with the interfaces of the main throttling device in the detection process of the two subsystems.
For example, in the 1 st subsystem detection process, a first temperature difference between the 1 st indoor heat exchanger (which may be other indoor heat exchangers of course) and the i th indoor heat exchanger is greater than or equal to a first preset temperature value, and in the 2 nd subsystem detection process, a first temperature difference between the 2 nd indoor heat exchanger (which may be other indoor heat exchangers of course) and the i th indoor heat exchanger is greater than or equal to a first preset temperature value, it may be determined that the interface of the sub-throttling device corresponding to the i th indoor heat exchanger is connected to the main throttling device, and at this time, the interface of the sub-throttling device of the i th indoor heat exchanger may be exchanged with the interface of the main throttling device, so that the main throttling device is connected to the correct interface.
Therefore, whether the main throttling device is connected to the correct interface can be conveniently and reliably judged, the correct interface of the main throttling device can be accurately and efficiently found when the main throttling device is not connected to the correct interface, and the efficiency of the error correction control method is improved.
According to some embodiments of the invention, in the detection process, when the first temperature difference values of the two indoor heat exchangers are both greater than or equal to a first preset temperature value, the value of the counter is increased by 1, and then the detection of the next subsystem is performed; when the counter value is incremented by 2, error correction is performed and the undetected subsystem is no longer detected. It can be understood that, when the first temperature difference values of the two indoor heat exchangers are both greater than or equal to the first preset temperature value twice, the correct position of the interface of the main throttling device can be determined.
Therefore, counting is carried out through the counter, after the phenomenon that the first temperature difference value of the two indoor heat exchangers is larger than or equal to the first preset temperature value occurs twice, the undetected subsystems are not detected any more, the interface position of the main throttling position is adjusted, the position of the main throttling device can be corrected in time, and time is saved.
According to some embodiments of the invention, step S32 includes: and in the detection process of the ith subsystem, respectively judging whether the second temperature difference value of each indoor heat exchanger is greater than or equal to a second preset temperature value, and if the second temperature difference value of one indoor heat exchanger in the N indoor heat exchangers is greater than or equal to the second preset temperature value, corresponding the indoor heat exchanger to the ith indoor heat exchanger corresponding to the ith subsystem. After the position error correction of all the sub-throttling devices is finished, the air conditioning system can be controlled to exit from the self-checking mode. Therefore, the indoor heat exchangers of the subsystems can be corresponding to the sub-throttling devices, and normal operation of the air conditioning system is guaranteed.
Specifically, in some embodiments of the present invention, in the detection process of the ith subsystem, if the indoor heat exchanger with the second temperature difference value being greater than or equal to the second preset temperature value is the ith indoor heat exchanger, the interface of the ith sub-throttling device is connected to the correct interface, and at this time, the next subsystem may be detected; if the indoor heat exchanger with the second temperature difference value larger than or equal to the second preset temperature value is not the ith indoor heat exchanger, the interface of the sub-throttling device corresponding to the indoor heat exchanger with the second temperature difference value larger than or equal to the second preset temperature value is exchanged with the interface of the ith sub-throttling device, and then the next subsystem is detected. Therefore, the indoor heat exchangers of the subsystems can be corresponding to the sub-throttling devices, and normal operation of the air conditioning system is guaranteed.
According to some embodiments of the invention, error correction is performed by modifying the software coding when the main throttle and/or the sub-throttle is not connected to the correct interface. Specifically, when the main throttle device is not connected to the correct interface, or the sub throttle device is not connected to the correct interface, or both the main throttle device and the sub throttle device are not connected to the correct interface, the main throttle device and the sub throttle device may be connected to the correct interface by modifying the software code. Therefore, the connecting pipe and the connecting line of the air conditioning system do not need to be reconnected, the labor intensity and the labor workload of workers or maintenance personnel and the like are greatly reduced, and the working efficiency is improved.
According to some embodiments of the invention, between S20 and S30 further comprises step S40: the compressor is shut down for a third preset period of time. For example, the third preset time period t3 is [2min, 6min ]. I.e. t3 is more than or equal to 2min and less than or equal to 6 min. For example, in some embodiments of the invention, t3 is 3min, or 4min, or 5min, etc. Therefore, the subsequent steps can be carried out when the temperature of the indoor heat exchanger is recovered to be close to the normal temperature, so that when the subsequent judgment whether the sub-throttling device is connected to the correct interface or not, the interference of the temperature difference (namely the second temperature difference) of the indoor heat exchanger on the judgment basis can be avoided, and the accuracy and the reliability of the error correction control method are improved.
It is understood that after detecting whether the main throttle is connected to the correct port, the compressor may directly enter the step of detecting whether the sub-throttle is connected to the correct port without stopping the compressor. At this time, the accuracy and reliability of the error correction control method can be ensured by adjusting the second preset temperature value.
According to some embodiments of the invention, the first temperature difference T1 is [3 ℃, 12 ℃ ] and the second temperature difference T2 is [3 ℃, 12 ℃ ]. Namely, T1 is more than or equal to 3 ℃ and less than or equal to 12 ℃, and T2 is more than or equal to 3 ℃ and less than or equal to 12 ℃. The specific values of the first temperature difference and the second temperature difference can be adjusted and designed according to actual working conditions. Therefore, the interference of the temperature difference value (namely the first temperature difference value and the second temperature difference value) of the indoor heat exchanger on the judgment basis can be avoided, and the accuracy and the reliability of the error correction control method are improved.
For example, after detecting whether the main throttling device is connected to the correct interface, the compressor is stopped for a third preset time period before entering the step of detecting whether the sub-throttling device is connected to the correct interface, the first temperature difference T1 may be 8 ℃, and the second temperature difference T2 may be 8 ℃. After detecting whether the main throttle is connected to the correct port, the first temperature difference T1 may be 8 ℃ and the second temperature difference T2 may be 6 ℃ when the compressor enters the step of detecting whether the sub throttle is connected to the correct port without stopping the compressor.
According to some embodiments of the invention, the first preset time period t1 is [2min, 30min ], and the second preset time period t2 is [2min, 30min ]. That is, t1 is more than or equal to 2min and less than or equal to 30min, and t2 is more than or equal to 2min and less than or equal to 30 min. The specific values of the first preset time and the second preset time can be adjusted and designed according to actual conditions, and the compressor can be in a stable operation state after the compressor operates for the first preset time and the second preset time.
For example, in some embodiments of the present invention, the first preset time period is 2min or 4min, so that it can be ensured that the compressor can reach the stable operation state after operating for the first preset time period, and the time period of the error correction control method can be shortened.
The second preset time is 2min or 4min, so that the compressor can be ensured to reach a stable operation state after the second preset time is operated, and the time of the error correction control method can be shortened.
According to some embodiments of the invention, the control valve is a check valve, and the check valve is in one-way communication from the outdoor heat exchanger to the subsystem. Therefore, when the air conditioning system runs in the self-checking mode, the parallel flow path is conducted, and when the main throttling device is not connected to the correct interface, a refrigerant can flow to the subsystem through the parallel flow path, so that the air conditioning system can run in the self-checking mode, and a control program of the air conditioning system can be simplified.
An air conditioning system 100 according to an embodiment of the second aspect of the present invention includes: a compressor 1, a reversing device 2, an outdoor heat exchanger 3, a main throttling device 5, N indoor heat exchangers 4, a parallel flow path 7 and a control module,
the compressor 1 has a discharge port 11 and a return port 12. The direction changing device 2 has a first port 21, a second port 22, a third port 23, and a fourth port 24, the first port 21 is connected to the exhaust port 11, and the second port 22 is connected to the return port 12. One end of the outdoor heat exchanger 3 is connected to the third valve port 23. One end of the main throttle device 5 is connected to the other end of the outdoor heat exchanger 3. The N indoor heat exchangers 4 are connected in parallel between the main throttling device 5 and the fourth valve port 24, the outdoor heat exchangers 3 are respectively connected with the N indoor units to form N subsystems, each subsystem is provided with a sub-throttling device 6, and N is a positive integer. The parallel flow path 7 is connected in parallel to both ends of the main throttle device 5, and the control valve 71 is provided on the parallel flow path 7. The control module controls the air conditioning system 100 to perform self-checking according to the error correction control method of the air conditioning system 100 according to the above-described first aspect of the present invention.
It is to be understood that the specific location of the neutron throttle device 6 in the subsystem is not limited by the present invention. Referring to fig. 1 and 2, the sub-throttle devices 6 may be disposed outside the corresponding indoor heat exchangers 4, may be disposed inside the corresponding indoor heat exchangers 4, and may be disposed inside the branch box 9.
According to the air conditioning system 100 of the second aspect of the present invention, the error correction control method of the air conditioning system 100 of the first aspect of the present invention is set to perform self-checking, and whether the main throttling device 5 and the sub-throttling device 6 of the air conditioning system 100 are connected to the correct interfaces can be determined through the self-checking mode, so that when the main throttling device 5 and the sub-throttling device 6 are not connected to the correct interfaces, correction is performed in time, and the main throttling device 5 and the sub-throttling device 6 are connected to the correct interfaces, so that the normal operation of the air conditioning system 100 is ensured, and the error correction control method is simple and reliable, low in cost, and high in error correction efficiency.
According to some embodiments of the present invention, the indoor heat exchanger further comprises a radiator 8 for radiating the electric control element, and the radiator 8 is connected in series between the main throttling device 5 and the N indoor heat exchangers 4. Specifically, the radiator 8 has a refrigerant passage therein, and the refrigerant flowing out of the sub-system flows to the main throttle device 5 through the refrigerant passage. From this, can take away electric control element's heat through the refrigerant, realize the heat dissipation to electric control element, simultaneously, through connecting radiator 8 between subsystem and main throttling arrangement 5, can control sub-throttling arrangement 6's aperture for the refrigerant does not throttle through sub-throttling arrangement 6, and throttles through main throttling arrangement 5, thereby can avoid radiator 8 to produce the condensation because of the refrigerant temperature is too low, and then can protect electric control element, avoid electric control element impaired.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Other configurations and operations of the air conditioning system 100 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. An error correction control method of an air conditioning system is characterized in that the air conditioning system comprises a compressor, a reversing device, an outdoor heat exchanger, a main throttling device, N indoor heat exchangers and a parallel flow path, wherein the compressor is provided with an exhaust port and a return port, the reversing device is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected with the exhaust port, the second valve port is connected with the return port, the third valve port is connected with one end of the outdoor heat exchanger, one end of the main throttling device is connected with the other end of the outdoor heat exchanger, the N indoor heat exchangers are connected in parallel between the main throttling device and the fourth valve port, the outdoor heat exchangers are respectively connected with N indoor units to form N sub-systems, the indoor heat exchanger in the ith sub-system is the ith indoor heat exchanger, each subsystem is provided with a sub-throttling device, the sub-throttling device in the ith subsystem is an ith sub-throttling device, wherein N is a positive integer, i is 1, 2 and 3 … … N, the parallel flow paths are connected in parallel at two ends of the main throttling device, the parallel flow paths are provided with control valves,
the error correction control method comprises the following steps:
s10: the air conditioning system enters a self-checking mode;
s20: detecting whether the primary throttling device is connected to the correct interface:
s21: the method comprises the steps of running a refrigeration mode, starting a first preset windshield, opening a control valve and opening a main throttling device to a first opening degree;
s22: sequentially detecting the 1 st to the m sub-systems, wherein the detection process of the ith sub-system is as follows: controlling an ith sub-throttling device of the ith subsystem to be opened to a second opening degree, closing other sub-throttling devices except the ith sub-throttling device, obtaining a first temperature value of each indoor heat exchanger, starting the compressor to operate at a first preset frequency, obtaining a second temperature value of each indoor heat exchanger after the compressor is started for a first preset time period, and calculating a first temperature difference value between the first temperature value and the second temperature value, wherein m is a positive integer greater than or equal to 2 and less than or equal to N;
s23: judging whether the main throttling device is connected to a correct interface or not according to the first temperature difference, if not, correcting error to enable the main throttling device to be connected to the correct interface, and if so, entering the next step;
s30: detecting one by one whether the sub-throttling devices of each subsystem are connected to the correct interface:
s31: closing all the sub throttling devices in the air conditioning system, operating a refrigeration mode, opening a second preset damper and opening the main throttling device to a third opening degree;
s32: and acquiring a third temperature value of each indoor heat exchanger, controlling the ith sub-throttling device of the ith subsystem to be started to a fourth angle, starting the compressor to operate at a second preset frequency, acquiring a fourth temperature value of each indoor heat exchanger after the compressor is started for a second preset time, calculating a second temperature difference value between the third temperature value and the fourth temperature value, judging whether the interface of the sub-throttling device corresponding to the ith subsystem is the ith sub-throttling device or not according to the second temperature difference value, and if not, correcting errors.
2. The error correction control method of an air conditioning system as claimed in claim 1, wherein the step S22 includes:
respectively judging whether the first temperature difference value of each indoor heat exchanger is greater than or equal to a first preset temperature value;
if the first temperature difference value of only one indoor heat exchanger in the N indoor heat exchangers is greater than or equal to the first preset temperature value in the detection process of each subsystem, the main throttling device is connected to a correct interface;
if the first temperature difference values of the two indoor heat exchangers are larger than or equal to the first preset temperature value in the detection process of the two subsystems, the interfaces of the sub throttling devices of the indoor heat exchangers, of which the first temperature difference values are larger than or equal to the first preset temperature value, are exchanged with the interfaces of the main throttling device.
3. The error correction control method of the air conditioning system according to claim 2, wherein in the detection process, when the first temperature difference value of the two indoor heat exchangers is greater than or equal to the first preset temperature value, the value of the counter is increased by 1, and then the detection of the next subsystem is performed; when the value of the counter is increased by 2, error correction is performed, and the undetected subsystem is no longer detected.
4. The error correction control method of an air conditioning system as claimed in claim 1, wherein the step S32 includes:
and in the detection process of the ith subsystem, respectively judging whether the second temperature difference value of each indoor heat exchanger is greater than or equal to a second preset temperature value, and if the second temperature difference value of one indoor heat exchanger in the N indoor heat exchangers is greater than or equal to the second preset temperature value, corresponding the indoor heat exchanger to the ith indoor heat exchanger corresponding to the ith subsystem.
5. The error correction control method of the air conditioning system according to claim 4, wherein in the detection process of the ith subsystem, if the indoor heat exchanger of which the second temperature difference value is greater than or equal to the second preset temperature value is the ith indoor heat exchanger, the interface of the ith sub-throttling device is connected to a correct interface; if the indoor heat exchanger with the second temperature difference value larger than or equal to the second preset temperature value is not the ith indoor heat exchanger, the interface of the sub throttling device corresponding to the indoor heat exchanger with the second temperature difference value larger than or equal to the second preset temperature value is exchanged with the interface of the ith sub throttling device.
6. The error correction control method of an air conditioning system according to any one of claims 1 to 5, wherein when the main throttle device and/or the sub throttle device is not connected to a correct interface, error correction is performed by modifying software coding.
7. The error correction control method of air conditioning system according to claim 1, further comprising, between said S20 and said S30, the step S40 of: the compressor is shut down for a third preset period of time.
8. The error correction control method of an air conditioning system according to claim 1 or 7, wherein the first temperature difference T1 is [3 ℃, 12 ℃ ] and the second temperature difference T2 is [3 ℃, 12 ℃ ].
9. The error correction control method of an air conditioning system according to claim 7, wherein the third preset time period t3 is [2min, 6min ].
10. The error correction control method of an air conditioning system according to claim 1, wherein the first preset time period t1 is [2min, 30min ], and the second preset time period t2 is [2min, 30min ].
11. The error correction control method of the air conditioning system according to claim 1, wherein the control valve is a check valve, and the check valve is in one-way communication from the outdoor heat exchanger to the subsystem.
12. An air conditioning system, comprising:
a compressor having a discharge port and a return port;
the reversing device is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected with the exhaust port, and the second valve port is connected with the return air port;
one end of the outdoor heat exchanger is connected with the third valve port;
one end of the main throttling device is connected with the other end of the outdoor heat exchanger;
the N indoor heat exchangers are connected between the main throttling device and the fourth valve port in parallel, the outdoor heat exchangers are respectively connected with the N indoor units to form N subsystems, each subsystem is provided with a sub-throttling device, and N is a positive integer;
a parallel flow path connected in parallel to both ends of the main throttle device, the parallel flow path being provided with a control valve,
a control module controlling the air conditioning system to perform self-checking according to the error correction control method of the air conditioning system according to any one of claims 1 to 11.
13. The air conditioning system of claim 12, further comprising a radiator for dissipating heat from the electrical control component, the radiator being connected in series between the primary throttle device and the N indoor heat exchangers.
CN202010325763.9A 2020-04-23 2020-04-23 Error correction control method of air conditioning system and air conditioning system Active CN111473462B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010325763.9A CN111473462B (en) 2020-04-23 2020-04-23 Error correction control method of air conditioning system and air conditioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010325763.9A CN111473462B (en) 2020-04-23 2020-04-23 Error correction control method of air conditioning system and air conditioning system

Publications (2)

Publication Number Publication Date
CN111473462A true CN111473462A (en) 2020-07-31
CN111473462B CN111473462B (en) 2021-02-26

Family

ID=71760565

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010325763.9A Active CN111473462B (en) 2020-04-23 2020-04-23 Error correction control method of air conditioning system and air conditioning system

Country Status (1)

Country Link
CN (1) CN111473462B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114110910A (en) * 2020-08-25 2022-03-01 广东美的制冷设备有限公司 Branch box self-checking method and device, storage medium and branch box
CN114838461A (en) * 2022-05-16 2022-08-02 美的集团武汉暖通设备有限公司 Control method of multi-split air conditioner, multi-split air conditioner and storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0336474A (en) * 1989-07-03 1991-02-18 Toshiba Corp Air conditioner
CN102042648A (en) * 2010-11-29 2011-05-04 青岛海信日立空调系统有限公司 Heat recovery type multi-connection air condition unit
CN104748426A (en) * 2015-03-31 2015-07-01 广东美的暖通设备有限公司 Multi-split system
CN104896682A (en) * 2015-06-30 2015-09-09 广东美的暖通设备有限公司 Temperature humidity dual control variable refrigerant flow air conditioning system and control method thereof
CN105928059A (en) * 2016-04-25 2016-09-07 广东美的暖通设备有限公司 Multi-online system and control method for heating and throttling element of multi-online system
CN109059360A (en) * 2018-06-19 2018-12-21 广东美的制冷设备有限公司 Control method, air-conditioning and the computer readable storage medium of electric expansion valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0336474A (en) * 1989-07-03 1991-02-18 Toshiba Corp Air conditioner
CN102042648A (en) * 2010-11-29 2011-05-04 青岛海信日立空调系统有限公司 Heat recovery type multi-connection air condition unit
CN104748426A (en) * 2015-03-31 2015-07-01 广东美的暖通设备有限公司 Multi-split system
CN104896682A (en) * 2015-06-30 2015-09-09 广东美的暖通设备有限公司 Temperature humidity dual control variable refrigerant flow air conditioning system and control method thereof
CN105928059A (en) * 2016-04-25 2016-09-07 广东美的暖通设备有限公司 Multi-online system and control method for heating and throttling element of multi-online system
CN109059360A (en) * 2018-06-19 2018-12-21 广东美的制冷设备有限公司 Control method, air-conditioning and the computer readable storage medium of electric expansion valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114110910A (en) * 2020-08-25 2022-03-01 广东美的制冷设备有限公司 Branch box self-checking method and device, storage medium and branch box
WO2022041668A1 (en) * 2020-08-25 2022-03-03 广东美的制冷设备有限公司 Self-checking method and device for branch box, storage medium, and branch box
CN114838461A (en) * 2022-05-16 2022-08-02 美的集团武汉暖通设备有限公司 Control method of multi-split air conditioner, multi-split air conditioner and storage medium
CN114838461B (en) * 2022-05-16 2024-02-20 美的集团武汉暖通设备有限公司 Control method of multi-split air conditioner, multi-split air conditioner and storage medium

Also Published As

Publication number Publication date
CN111473462B (en) 2021-02-26

Similar Documents

Publication Publication Date Title
CN107084494B (en) Fault detection method and device for electronic expansion valve and multi-connected air conditioning system
CN111473462B (en) Error correction control method of air conditioning system and air conditioning system
US8109101B2 (en) Heating, ventilation, air conditioning and refrigeration system with multi-zone monitoring and diagnostics
CN104676818B (en) The detection method of multi-connected air conditioner device setup error
CN109237721B (en) Electronic expansion valve fault detection method for air conditioner
CN110410936A (en) A kind of multi-line system fault detection method, device and multi-line system
CN101231016A (en) Device and method for connecting and detecting pipe of multi-connected air conditioner
JP2007333219A (en) Multi-type air-conditioning system
CN109990439A (en) A kind of control method, control device and air conditioner that the commutation of air-conditioning four-way valve is abnormal
CN105299841A (en) Multi-split air conditioning system and fault detection method of heat exchange valve bodies of outdoor heat exchanger of multi-split air conditioning system
CN107284193A (en) Air-conditioning system, the control system of the air-conditioning system and control method
EP1643193B1 (en) Method of determining the configuration of an air conditioning system
CN106404371A (en) Electronic expansion valve detection method, device and air conditioning system
US20240005212A1 (en) Correction apparatus, prediction apparatus, method, non-transitory computer-readable recording medium storing program, and correction model
Katipamula et al. Rooftop unit embedded diagnostics: Automated fault detection and diagnostics (AFDD) development, field testing and validation
KR20070017269A (en) Pipe inspection operation and method of Multi air conditioner
CN113154524A (en) Detection method and device of multi-split air conditioning system and multi-split system
CN106322580A (en) Multi-split air conditioning system and defrosting control method and defrosting control device therefor
US20220282885A1 (en) Expansion valve control method for multi-connection air-conditioning system
CN111006306B (en) Multi-split air conditioner
CN110529993B (en) Operation control device and method, air conditioner, and computer-readable storage medium
JP2008039388A (en) Multi-type air conditioner
JP4885757B2 (en) Air conditioning control system
CN105865096A (en) Method and unit for improving heating effect of multi-connected machine set
US11774151B1 (en) Heat pump reversing valve fault detection system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant