CN108361915B - Fault detection method and device, air conditioner and computer readable storage medium - Google Patents

Fault detection method and device, air conditioner and computer readable storage medium Download PDF

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Publication number
CN108361915B
CN108361915B CN201810111788.1A CN201810111788A CN108361915B CN 108361915 B CN108361915 B CN 108361915B CN 201810111788 A CN201810111788 A CN 201810111788A CN 108361915 B CN108361915 B CN 108361915B
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temperature
temperature difference
stop valve
preset
indoor
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CN108361915A (en
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申孟亮
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/38—Failure diagnosis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature

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

Abstract

The invention provides a fault detection method, a fault detection device, an air conditioner and a computer readable storage medium, wherein the fault detection method is suitable for the air conditioner, the air conditioner is provided with an indoor unit and an outdoor unit, a communication pipeline between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is also provided with an indoor heat exchanger, and the fault detection method comprises the following steps: collecting the coil temperature of the indoor heat exchanger for specified times within a preset time period; calculating the temperature difference between the temperature of the coil pipe acquired at any time and the preset temperature in real time; when the temperature difference acquired at any time is detected to be larger than or equal to the preset temperature difference, determining that the stop valve has no fault; and when the temperature difference acquired each time is detected to be smaller than the preset temperature difference, determining that the stop valve has a fault. By the technical scheme, whether the stop valve is normally opened after the stop valve is installed or overhauled is detected, the reliability of determining the fault of the stop valve is improved, and the phenomenon of high-temperature demagnetization of the compressor caused by the fact that the stop valve is not opened or the fault of the stop valve is effectively reduced.

Description

Fault detection method and device, air conditioner and computer readable storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fault detection method, a fault detection device, an air conditioner and a computer readable storage medium.
Background
In order to facilitate installation and maintenance, stop valves are arranged in the air conditioner to control opening of refrigerant circulation, besides the subsystem stop valves of each indoor unit, a master stop valve is also arranged in the multi-split air conditioner, and in the installation process, the problem that the stop valves are not opened to cause failure easily occurs, the refrigerant is lacked in the air conditioner system easily, the conditions of no refrigeration and no heating occur, and the compressor is high in temperature and demagnetized seriously.
Therefore, how to timely detect and ensure that the stop valve has no fault after installation and maintenance becomes a technical problem to be solved urgently.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, it is an object of the present invention to provide a fault detection method.
It is another object of the present invention to provide a fault detection device.
It is still another object of the present invention to provide an air conditioner.
It is yet another object of the present invention to provide a computer-readable storage medium.
In order to achieve the above object, a first aspect of the present invention provides a fault detection method, which is applicable to an air conditioner, the air conditioner includes an indoor unit and an outdoor unit, a communication pipeline between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is further provided with an indoor heat exchanger, and the fault detection method includes: collecting the coil temperature of the indoor heat exchanger for specified times within a preset time period; calculating the temperature difference between the temperature of the coil pipe acquired at any time and the preset temperature in real time; when the temperature difference acquired at any time is detected to be larger than or equal to the preset temperature difference, determining that the stop valve has no fault; and when the temperature difference acquired each time is detected to be smaller than the preset temperature difference, determining that the stop valve has a fault.
In the technical scheme, data basis is provided for determining whether the stop valve is in fault or not by collecting the coil temperature of the indoor heat exchanger for specified times in a preset time period, the temperature difference between the coil temperature collected at any time and the preset temperature is calculated in real time, the determination of whether the stop valve is in fault or not is favorably realized, the stop valve is determined to be free of fault when the temperature difference collected at any time is detected to be larger than or equal to the preset temperature difference, a detection program for determining the fault of the stop valve is favorably saved, the failure of the stop valve is determined when the temperature difference collected at each time is detected to be smaller than the preset temperature difference, the reliability for determining the fault of the stop valve is improved, the reliability for operating the air conditioner is further favorably improved, the phenomenon of high temperature demagnetization of a compressor caused by not opening the stop valve or the failure of the stop valve is effectively reduced, and the temperature sensing bag arranged in the, the simplicity and feasibility are high.
It should be noted that, the fault detection method provided by the present invention is generally started at the initial startup after the installation or the maintenance is completed, and the fault detection method is suitable for both the air conditioner of a single indoor unit and the air conditioners of a plurality of indoor units, that is, a multi-split air conditioning system.
Specifically, when the multi-split air conditioning system is used, the coil temperature of the indoor heat exchanger of each indoor unit in operation is collected for a specified number of times within a preset time period, the stop valve is determined to be fault-free and opened as long as the collected temperature difference is greater than or equal to the preset temperature difference, and the stop valve is determined to be fault only when all the collected temperature differences are less than the preset temperature difference, wherein the fault of the stop valve includes that the stop valve is not opened.
It should be further noted that the coil temperature of the indoor heat exchanger collected for the specified times in the preset time period may be collected once every 30 seconds in the preset time period, or may be collected for multiple times at different time intervals.
The technical scheme of the second aspect of the invention provides a fault detection method, which is suitable for an air conditioner, wherein the air conditioner is provided with an indoor unit and an outdoor unit, a communication pipeline between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is also provided with an indoor heat exchanger, and the fault detection method comprises the following steps: collecting the coil temperature of the indoor heat exchanger for specified times within a preset time period; calculating the temperature difference between the temperature of the coil pipe acquired at any time and the preset temperature in real time; when the temperature difference acquired at any time is detected to be larger than or equal to the preset temperature difference, determining that the stop valve has no fault; and determining that the stop valve is in fault only when the temperature difference acquired last time is detected to be less than or equal to the preset temperature difference.
In the technical scheme, data basis is provided for determining whether the stop valve is in fault or not by collecting the coil temperature of the indoor heat exchanger for specified times in a preset time period, the temperature difference between the coil temperature collected at any time and the preset temperature is calculated in real time, the determination of whether the stop valve is in fault or not is facilitated, the stop valve is determined to be free of fault when the temperature difference collected at any time is detected to be larger than or equal to the preset temperature difference, the detection program for determining the fault of the stop valve is facilitated to be saved, the detection reliability of the fault of the stop valve is improved by determining the fault of the stop valve only when the temperature difference collected at the last time is detected to be smaller than or equal to the preset temperature difference, the operation reliability of the air conditioner is facilitated to be improved, the phenomenon of high-temperature demagnetization of a compressor caused by not opening the stop valve or the fault of the stop valve is effectively reduced, and the temperature sensing, the simplicity and feasibility are high.
It should be noted that, the fault detection method provided by the present invention is generally started at the initial startup after the installation or the maintenance is completed, and the fault detection method is suitable for both the air conditioner of a single indoor unit and the air conditioners of a plurality of indoor units, that is, a multi-split air conditioning system.
Specifically, when the multi-split air conditioning system is used, the coil temperature of the indoor heat exchanger of each indoor unit in operation is collected for a specified number of times within a preset time period, the stop valve is determined to be fault-free as long as the collected temperature difference is greater than or equal to the preset temperature difference, and the stop valve is determined to be fault only when the temperature difference collected for the last time of each indoor unit in operation is less than the preset temperature difference, wherein the fault of the stop valve includes that the stop valve is not opened.
It should be further noted that the coil temperature of the indoor heat exchanger collected for the specified times in the preset time period may be collected once every 30 seconds in the preset time period, or may be collected for multiple times at different time intervals.
In any one of the above technical solutions, preferably, before collecting the coil temperature of the indoor heat exchanger for a specified number of times within a preset time period, the method further includes: and when an initial starting command signal is received, detecting the temperature of the coil of the indoor heat exchanger, and determining the temperature as a preset temperature.
In this technical scheme, through when receiving initial start command signal, detect indoor heat exchanger's coil pipe temperature, and confirm to predetermine the temperature, with the coil pipe temperature of indoor heat exchanger when receiving initial start command signal as the contrast parameter, be more favorable to judging whether there is the refrigerant circulation in the indoor heat exchanger, thereby whether more accurate judgement stop valve is out of order, whether opened, promote the reliability that the stop valve trouble was confirmed, be favorable to the fault detection of pertinence, be favorable to reducing the phenomenon of compressor high temperature demagnetization that leads to because of not opening stop valve or stop valve trouble.
It should be noted that the initial boot instruction signal is generally an initial boot start signal after installation or maintenance is completed.
In any one of the above technical solutions, preferably, before collecting the coil temperature of the indoor heat exchanger for a specified number of times within a preset time period, the method further includes: when an initial starting command signal is received, detecting the indoor environment temperature of the indoor unit and determining the indoor environment temperature as a preset temperature.
In the technical scheme, when the initial starting instruction signal is received, the indoor environment temperature where the indoor unit is located is detected, the preset temperature is determined, the indoor environment temperature where the indoor unit is located when the initial starting instruction signal is received serves as a comparison parameter, whether a refrigerant circulates in the indoor heat exchanger or not is judged more favorably, whether the stop valve is in fault or not is judged more accurately, whether the stop valve is opened or not is judged, the reliability of the stop valve fault determination is improved, the targeted fault detection is facilitated, and the phenomenon of high-temperature demagnetization of the compressor caused by the fact that the stop valve is not opened or the stop valve is in fault is reduced.
It should be noted that the initial boot instruction signal is generally an initial boot start signal after installation or maintenance is completed.
In any one of the above technical solutions, preferably, when it is detected that the temperature difference acquired at any time is greater than or equal to the preset temperature difference, after it is determined that the stop valve is not faulty, the method further includes: judging whether all temperature differences acquired within a preset time period corresponding to the same indoor unit are smaller than a preset temperature difference or not; and when all the temperature differences acquired within the preset time period corresponding to the same indoor unit are judged to be smaller than the preset temperature difference, generating abnormal prompt information corresponding to the indoor unit.
In the technical scheme, whether all the temperature differences collected in the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference or not is judged, so that whether the indoor unit is abnormal or not is favorably determined, and abnormal prompt information of the corresponding indoor unit is generated when all the temperature differences collected in the preset time period corresponding to the same indoor unit are judged to be smaller than the preset temperature difference, so that a user is favorably prompted to timely check the conditions that the corresponding indoor unit does not receive a remote control signal or an electronic expansion valve is abnormal and the like.
In any of the above technical solutions, preferably, the value range of the preset time period is 3min to 6min, and the value range of the preset temperature difference is 2 ℃ to 5 ℃.
In the technical scheme, the value range of the preset time period is 3-6 min, on one hand, the risk of compressor high-temperature demagnetization caused by the fact that the compressor runs for a long time under the condition of stop valve faults is reduced, on the other hand, the phenomenon of misjudgment of stop valve faults caused by the fact that temperature changes caused by the fact that the compressor runs for a short time under low power are not obvious is reduced, the reliability of stop valve fault determination is further improved by the fact that the value range of the preset temperature difference is 2-5 ℃, and the phenomenon of compressor high-temperature demagnetization caused by the fact that the stop valve is not opened or the stop valve faults are reduced is facilitated.
The technical scheme of the third aspect of the invention provides a fault detection device, which is suitable for an air conditioner, wherein the air conditioner is provided with an indoor unit and an outdoor unit, a communication pipeline between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is also provided with an indoor heat exchanger, and the fault detection device comprises: the system comprises a collecting unit, a control unit and a control unit, wherein the collecting unit is used for collecting the coil temperature of the indoor heat exchanger for specified times in a preset time period; the calculating unit is used for calculating the temperature difference between the temperature of the coil pipe acquired at any time and the preset temperature in real time; the determining unit is used for determining that the stop valve has no fault when the detected temperature difference acquired at any time is greater than or equal to the preset temperature difference; the determination unit is further configured to: and when the temperature difference acquired each time is detected to be smaller than the preset temperature difference, determining that the stop valve has a fault.
In the technical scheme, data basis is provided for determining whether the stop valve is in fault or not by collecting the coil temperature of the indoor heat exchanger for specified times in a preset time period, the temperature difference between the coil temperature collected at any time and the preset temperature is calculated in real time, the determination of whether the stop valve is in fault or not is favorably realized, the stop valve is determined to be free of fault when the temperature difference collected at any time is detected to be larger than or equal to the preset temperature difference, a detection program for determining the fault of the stop valve is favorably saved, the failure of the stop valve is determined when the temperature difference collected at each time is detected to be smaller than the preset temperature difference, the reliability for determining the fault of the stop valve is improved, the reliability for operating the air conditioner is further favorably improved, the phenomenon of high temperature demagnetization of a compressor caused by not opening the stop valve or the failure of the stop valve is effectively reduced, and the temperature sensing bag arranged in the, the simplicity and feasibility are high.
It should be noted that, the fault detection method provided by the present invention is generally started at the initial startup after the installation or the maintenance is completed, and the fault detection method is suitable for both the air conditioner of a single indoor unit and the air conditioners of a plurality of indoor units, that is, a multi-split air conditioning system.
Specifically, when the multi-split air conditioning system is used, the coil temperature of the indoor heat exchanger of each indoor unit in operation is collected for a specified number of times within a preset time period, the stop valve is determined to be fault-free and opened as long as the collected temperature difference is greater than or equal to the preset temperature difference, and the stop valve is determined to be fault only when all the collected temperature differences are less than the preset temperature difference, wherein the fault of the stop valve includes that the stop valve is not opened.
It should be further noted that the coil temperature of the indoor heat exchanger collected for the specified times in the preset time period may be collected once every 30 seconds in the preset time period, or may be collected for multiple times at different time intervals.
The technical scheme of the fourth aspect of the invention provides a fault detection device, which is suitable for an air conditioner, wherein the air conditioner is provided with an indoor unit and an outdoor unit, a communication pipeline between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is also provided with an indoor heat exchanger, and the fault detection device comprises: the system comprises a collecting unit, a control unit and a control unit, wherein the collecting unit is used for collecting the coil temperature of the indoor heat exchanger for specified times in a preset time period; the calculating unit is used for calculating the temperature difference between the temperature of the coil pipe acquired at any time and the preset temperature in real time; the determining unit is used for determining that the stop valve has no fault when the detected temperature difference acquired at any time is greater than or equal to the preset temperature difference; the determination unit is further configured to: and determining that the stop valve is in fault only when the temperature difference acquired last time is detected to be less than or equal to the preset temperature difference.
In the technical scheme, data basis is provided for determining whether the stop valve is in fault or not by acquiring the coil temperature of the indoor heat exchanger for specified times in a preset time period, the temperature difference between the coil temperature acquired at any time and the preset temperature is calculated in real time, the determination of whether the stop valve is in fault or not is facilitated, the stop valve is determined to be free of fault when the temperature difference acquired at any time is detected to be greater than or equal to the preset temperature difference, the detection program for determining the fault of the stop valve is facilitated to be saved, the stop valve is determined to be in fault only when the temperature difference acquired at the last time is detected to be less than or equal to the preset temperature difference, the operation reliability of the air conditioner is facilitated to be improved, the phenomenon of high-temperature demagnetization of a compressor caused by the fact that the stop valve is not opened or the stop valve is failed is effectively reduced, and the temperature sensing, the simplicity and feasibility are high.
It should be noted that, the fault detection method provided by the present invention is generally started at the initial startup after the installation or the maintenance is completed, and the fault detection method is suitable for both the air conditioner of a single indoor unit and the air conditioners of a plurality of indoor units, that is, a multi-split air conditioning system.
Specifically, when the multi-split air conditioning system is used, the coil temperature of the indoor heat exchanger of each indoor unit in operation is collected for a specified number of times within a preset time period, the stop valve is determined to be fault-free as long as the collected temperature difference is greater than or equal to the preset temperature difference, and the stop valve is determined to be fault only when the temperature difference collected for the last time of each indoor unit in operation is less than the preset temperature difference, wherein the fault of the stop valve includes that the stop valve is not opened.
It should be further noted that the coil temperature of the indoor heat exchanger collected for the specified times in the preset time period may be collected once every 30 seconds in the preset time period, or may be collected for multiple times at different time intervals.
In any one of the above technical solutions, preferably, the method further includes: and the first detection unit is used for detecting the temperature of the coil pipe of the indoor heat exchanger when receiving the initial starting instruction signal and determining the temperature as the preset temperature.
In this technical scheme, through when receiving initial start command signal, detect indoor heat exchanger's coil pipe temperature, and confirm to predetermine the temperature, with the coil pipe temperature of indoor heat exchanger when receiving initial start command signal as the contrast parameter, be more favorable to judging whether there is the refrigerant circulation in the indoor heat exchanger, thereby whether more accurate judgement stop valve is out of order, whether opened, promote the reliability that the stop valve trouble was confirmed, be favorable to the fault detection of pertinence, be favorable to reducing the phenomenon of compressor high temperature demagnetization that leads to because of not opening stop valve or stop valve trouble.
It should be noted that the initial boot instruction signal is generally an initial boot start signal after installation or maintenance is completed.
In any one of the above technical solutions, preferably, the method further includes: and the second detection unit is used for detecting the indoor environment temperature of the indoor unit when the initial starting instruction signal is received and determining the indoor environment temperature as the preset temperature.
In the technical scheme, when the initial starting instruction signal is received, the indoor environment temperature where the indoor unit is located is detected, the preset temperature is determined, the indoor environment temperature where the indoor unit is located when the initial starting instruction signal is received serves as a comparison parameter, whether a refrigerant circulates in the indoor heat exchanger or not is judged more favorably, whether the stop valve is in fault or not is judged more accurately, whether the stop valve is opened or not is judged, the reliability of the stop valve fault determination is improved, the targeted fault detection is facilitated, and the phenomenon of high-temperature demagnetization of the compressor caused by the fact that the stop valve is not opened or the stop valve is in fault is reduced.
It should be noted that the initial boot instruction signal is generally an initial boot start signal after installation or maintenance is completed.
In any one of the above technical solutions, preferably, the method further includes: the judging unit is used for judging whether all the temperature differences acquired within a preset time period corresponding to the same indoor unit are smaller than a preset temperature difference or not; and the generating unit is used for generating abnormal prompt information of the corresponding indoor unit when all the temperature differences acquired within the preset time period corresponding to the same indoor unit are judged to be less than the preset temperature difference.
In the technical scheme, whether all the temperature differences collected in the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference or not is judged, so that whether the indoor unit is abnormal or not is favorably determined, and abnormal prompt information of the corresponding indoor unit is generated when all the temperature differences collected in the preset time period corresponding to the same indoor unit are judged to be smaller than the preset temperature difference, so that a user is favorably prompted to timely check the conditions that the corresponding indoor unit does not receive a remote control signal or an electronic expansion valve is abnormal and the like.
In any of the above technical solutions, preferably, the value range of the preset time period is 3min to 6min, and the value range of the preset temperature difference is 2 ℃ to 5 ℃.
In the technical scheme, the value range of the preset time period is 3-6 min, on one hand, the risk of compressor high-temperature demagnetization caused by the fact that the compressor runs for a long time under the condition of stop valve faults is reduced, on the other hand, the phenomenon of misjudgment of stop valve faults caused by the fact that temperature changes caused by the fact that the compressor runs for a short time under low power are not obvious is reduced, the reliability of stop valve fault determination is further improved by the fact that the value range of the preset temperature difference is 2-5 ℃, and the phenomenon of compressor high-temperature demagnetization caused by the fact that the stop valve is not opened or the stop valve faults are reduced is facilitated.
The technical solution of the fifth aspect of the present invention provides an air conditioner, which includes an indoor unit and an outdoor unit, wherein a communication pipeline between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is further provided with an indoor heat exchanger, and the air conditioner further includes: the above-described fault detection device according to any one of the aspects of the present invention.
In this technical solution, the air conditioner includes any one of the fault detection devices proposed in the technical solutions of the present invention, and therefore, all the beneficial effects of any one of the fault detection devices proposed in the technical solutions of the present invention are not described herein again.
An aspect of the sixth aspect of the present invention proposes a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the steps of the fault detection method of any one of the aspects presented in the above-mentioned aspects of the present invention.
In this technical solution, a computer readable storage medium stores thereon a computer program, and when the computer program is executed by a processor, the steps of the fault detection method according to any one of the above technical solutions of the present invention are implemented, so that all the beneficial effects of the fault detection method according to any one of the above technical solutions of the present invention are achieved, and details are not described herein again.
Through above technical scheme, gather the coil pipe temperature of the indoor heat exchanger of appointed number of times in the time quantum of predetermineeing, calculate the coil pipe temperature of any collection in real time and the difference in temperature between the predetermined temperature of confirming when receiving initial start instruction signal, and confirm whether the stop valve breaks down according to the difference in temperature, realized the check of whether normally opening the stop valve after installation or overhaul completion, promoted the definite reliability of stop valve trouble, effectively reduced the phenomenon of compressor high temperature demagnetization that leads to because of not opening stop valve or stop valve trouble.
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 shows a schematic flow diagram of a fault detection method according to one embodiment of the invention;
FIG. 2 shows a schematic flow diagram of a fault detection method according to another embodiment of the invention;
FIG. 3 shows a schematic block diagram of a fault detection apparatus according to an embodiment of the present invention;
FIG. 4 illustrates a schematic block diagram of an air conditioner according to an embodiment of the present invention;
FIG. 5 shows an enlarged schematic view at A in FIG. 4;
FIG. 6 shows a schematic flow chart diagram of a fault detection method according to a further embodiment of the invention;
fig. 7 shows a schematic flow diagram of a fault detection method according to a further embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Fig. 1 shows a schematic flow diagram of a fault detection method according to an embodiment of the invention.
As shown in fig. 1, a fault detection method according to an embodiment of the present invention is applicable to an air conditioner, including: the air conditioner is provided with an indoor unit and an outdoor unit, a communication pipeline between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is also provided with an indoor heat exchanger, and the fault detection method comprises the following steps:
s102, collecting the coil temperature of the indoor heat exchanger for a specified number of times within a preset time period;
s104, calculating the temperature difference between the temperature of the coil collected at any time and a preset temperature in real time;
s106, when the temperature difference acquired at any time is detected to be larger than or equal to the preset temperature difference, determining that the stop valve has no fault;
and S108, determining that the stop valve is in fault when the temperature difference acquired each time is smaller than the preset temperature difference.
In the embodiment, the coil temperature of the indoor heat exchanger is collected for the appointed times in the preset time period, a data basis is provided for the determination of whether the stop valve is in failure, the temperature difference between the coil temperature collected at any time and the preset temperature is calculated in real time, the determination of whether the stop valve is in failure is favorably realized, the stop valve is determined to be free of failure when the temperature difference collected at any time is detected to be larger than or equal to the preset temperature difference, the detection program for determining the failure of the stop valve is favorably saved, the failure of the stop valve is determined when the temperature difference collected at each time is detected to be smaller than the preset temperature difference, the determination reliability of the failure of the stop valve is improved, the operation reliability of the air conditioner is further favorably improved, the phenomenon of high-temperature demagnetization of a compressor caused by the fact that the stop valve is not opened or the failure of the stop valve is effectively reduced, and, the simplicity and feasibility are high.
It should be noted that, the fault detection method provided by the present invention is generally started at the initial startup after the installation or the maintenance is completed, and the fault detection method is suitable for both the air conditioner of a single indoor unit and the air conditioners of a plurality of indoor units, that is, a multi-split air conditioning system.
Specifically, when the multi-split air conditioning system is used, the coil temperature of the indoor heat exchanger of each indoor unit in operation is collected for a specified number of times within a preset time period, the stop valve is determined to be fault-free and opened as long as the collected temperature difference is greater than or equal to the preset temperature difference, and the stop valve is determined to be fault only when all the collected temperature differences are less than the preset temperature difference, wherein the fault of the stop valve includes that the stop valve is not opened.
It should be further noted that the coil temperature of the indoor heat exchanger collected for the specified times in the preset time period may be collected once every 30 seconds in the preset time period, or may be collected for multiple times at different time intervals.
Fig. 2 shows a schematic flow diagram of a fault detection method according to another embodiment of the invention.
As shown in fig. 2, the fault detection method according to the embodiment of the present invention is applicable to an air conditioner, the air conditioner includes an indoor unit and an outdoor unit, a communication pipe between the indoor unit and the outdoor unit includes a stop valve, the indoor unit further includes an indoor heat exchanger, and the fault detection method includes:
s202, collecting coil pipe temperature of the indoor heat exchanger for specified times in a preset time period;
s204, calculating the temperature difference between the temperature of the coil pipe acquired at any time and the preset temperature in real time;
s206, when the temperature difference acquired at any time is detected to be larger than or equal to the preset temperature difference, determining that the stop valve has no fault;
and S208, determining that the stop valve is in fault only when the temperature difference acquired for the last time is detected to be less than or equal to the preset temperature difference.
In the embodiment, the coil temperature of the indoor heat exchanger is collected for the appointed times in the preset time period, a data basis is provided for the determination of whether the stop valve is in failure, the temperature difference between the coil temperature collected at any time and the preset temperature is calculated in real time, the determination of whether the stop valve is in failure is facilitated, the stop valve is determined to be free of failure when the temperature difference collected at any time is detected to be larger than or equal to the preset temperature difference, the detection program for determining the failure of the stop valve is facilitated to be saved, the failure of the stop valve is determined only when the temperature difference collected at the last time is detected to be smaller than or equal to the preset temperature difference, the detection reliability of the failure of the stop valve is improved, the operation reliability of the air conditioner is further facilitated to be improved, the phenomenon of high-temperature demagnetization of a compressor caused by not opening the stop valve or the failure of the stop valve is effectively reduced, the simplicity and feasibility are high.
It should be noted that, the fault detection method provided by the present invention is generally started at the initial startup after the installation or the maintenance is completed, and the fault detection method is suitable for both the air conditioner of a single indoor unit and the air conditioners of a plurality of indoor units, that is, a multi-split air conditioning system.
Specifically, when the multi-split air conditioning system is used, the coil temperature of the indoor heat exchanger of each indoor unit in operation is collected for a specified number of times within a preset time period, the stop valve is determined to be fault-free as long as the collected temperature difference is greater than or equal to the preset temperature difference, and the stop valve is determined to be fault only when the temperature difference collected for the last time of each indoor unit in operation is less than the preset temperature difference, wherein the fault of the stop valve includes that the stop valve is not opened.
It should be further noted that the coil temperature of the indoor heat exchanger collected for the specified times in the preset time period may be collected once every 30 seconds in the preset time period, or may be collected for multiple times at different time intervals.
In any one of the above embodiments, preferably, before collecting the coil temperature of the indoor heat exchanger for a specified number of times within a preset time period, the method further includes: and when an initial starting command signal is received, detecting the temperature of the coil of the indoor heat exchanger, and determining the temperature as a preset temperature.
In this embodiment, through when receiving initial start-up command signal, detect the coil pipe temperature of indoor heat exchanger, and confirm to predetermine the temperature, with the coil pipe temperature of indoor heat exchanger when receiving initial start-up command signal as the contrast parameter, be more favorable to judging whether there is the refrigerant circulation in the indoor heat exchanger, thereby whether more accurate judgement stop valve is out of order, whether opened, promote the reliability that the stop valve trouble was confirmed, be favorable to the fault check of pertinence, be favorable to reducing the phenomenon of compressor high temperature demagnetization that leads to because of not opening stop valve or stop valve trouble.
It should be noted that the initial boot instruction signal is generally an initial boot start signal after installation or maintenance is completed.
In any one of the above embodiments, preferably, before collecting the coil temperature of the indoor heat exchanger for a specified number of times within a preset time period, the method further includes: when an initial starting command signal is received, detecting the indoor environment temperature of the indoor unit and determining the indoor environment temperature as a preset temperature.
In the embodiment, when the initial starting instruction signal is received, the indoor environment temperature where the indoor unit is located is detected and determined to be the preset temperature, and the indoor environment temperature where the indoor unit is located when the initial starting instruction signal is received is used as a comparison parameter, so that whether a refrigerant flows in the indoor heat exchanger or not is more favorably judged, whether the stop valve is in a fault or not is more accurately judged, whether the stop valve is opened or not is judged, the reliability of the stop valve fault determination is improved, the targeted fault detection is favorably realized, and the phenomenon of high-temperature demagnetization of the compressor caused by the fact that the stop valve is not opened or the stop valve is in a fault is favorably reduced.
It should be noted that the initial boot instruction signal is generally an initial boot start signal after installation or maintenance is completed.
In any one of the above embodiments, preferably, after determining that the stop valve is not faulty when detecting that the temperature difference acquired at any time is greater than or equal to the preset temperature difference, the method further includes: judging whether all temperature differences acquired within a preset time period corresponding to the same indoor unit are smaller than a preset temperature difference or not; and when all the temperature differences acquired within the preset time period corresponding to the same indoor unit are judged to be smaller than the preset temperature difference, generating abnormal prompt information corresponding to the indoor unit.
In this embodiment, it is beneficial to determine whether the indoor units are abnormal by determining whether all the temperature differences acquired within the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference, and it is beneficial to prompt the user to check the situations such as no remote control signal being received or abnormality of the electronic expansion valve in time by generating the abnormal prompt information of the corresponding indoor unit when it is determined that all the temperature differences acquired within the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference.
In any of the above embodiments, preferably, the value range of the preset time period is 3min to 6min, and the value range of the preset temperature difference is 2 ℃ to 5 ℃.
In the embodiment, the value range of the preset time period is 3-6 min, so that on one hand, the risk of high-temperature demagnetization of the compressor caused by long running time under the condition of stop valve failure is reduced, on the other hand, the phenomenon of misjudgment of stop valve failure caused by unobvious temperature change caused by short running time under lower power is reduced, the reliability of stop valve failure determination is further improved by presetting the value range of temperature difference to be 2-5 ℃, and the phenomenon of high-temperature demagnetization of the compressor caused by non-opening of the stop valve or stop valve failure is favorably reduced.
Fig. 3 shows a schematic block diagram of a fault detection arrangement 300 according to an embodiment of the invention.
The fault detection device 300 according to an embodiment of the present invention is applicable to an air conditioner, the air conditioner includes an indoor unit and an outdoor unit, a communication pipe between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is further provided with an indoor heat exchanger, and the fault detection device 300 includes: the acquisition unit 302 is used for acquiring the coil temperature of the indoor heat exchanger for specified times within a preset time period; the calculating unit 304 is used for calculating the temperature difference between the temperature of the coil pipe acquired at any time and the preset temperature in real time; the determining unit 306 is used for determining that the stop valve has no fault when the detected temperature difference acquired at any time is greater than or equal to the preset temperature difference; the determining unit 306 is further configured to: and when the temperature difference acquired each time is detected to be smaller than the preset temperature difference, determining that the stop valve has a fault.
In the embodiment, the coil temperature of the indoor heat exchanger is collected for the appointed times in the preset time period, a data basis is provided for the determination of whether the stop valve is in failure, the temperature difference between the coil temperature collected at any time and the preset temperature is calculated in real time, the determination of whether the stop valve is in failure is favorably realized, the stop valve is determined to be free of failure when the temperature difference collected at any time is detected to be larger than or equal to the preset temperature difference, the detection program for determining the failure of the stop valve is favorably saved, the failure of the stop valve is determined when the temperature difference collected at each time is detected to be smaller than the preset temperature difference, the determination reliability of the failure of the stop valve is improved, the operation reliability of the air conditioner is further favorably improved, the phenomenon of high-temperature demagnetization of a compressor caused by the fact that the stop valve is not opened or the failure of the stop valve is effectively reduced, and, the simplicity and feasibility are high.
It should be noted that, the fault detection method provided by the present invention is generally started at the initial startup after the installation or the maintenance is completed, and the fault detection method is suitable for both the air conditioner of a single indoor unit and the air conditioners of a plurality of indoor units, that is, a multi-split air conditioning system.
Specifically, when the multi-split air conditioning system is used, the coil temperature of the indoor heat exchanger of each indoor unit in operation is collected for a specified number of times within a preset time period, the stop valve is determined to be fault-free and opened as long as the collected temperature difference is greater than or equal to the preset temperature difference, and the stop valve is determined to be fault only when all the collected temperature differences are less than the preset temperature difference, wherein the fault of the stop valve includes that the stop valve is not opened.
It should be further noted that the coil temperature of the indoor heat exchanger collected for the specified times in the preset time period may be collected once every 30 seconds in the preset time period, or may be collected for multiple times at different time intervals.
The fault detection device 300 according to an embodiment of the present invention is applicable to an air conditioner, the air conditioner includes an indoor unit and an outdoor unit, a communication pipe between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is further provided with an indoor heat exchanger, and the fault detection device 300 includes: the acquisition unit 302 is used for acquiring the coil temperature of the indoor heat exchanger for specified times within a preset time period; the calculating unit 304 is used for calculating the temperature difference between the temperature of the coil pipe acquired at any time and the preset temperature in real time; the determining unit 306 is used for determining that the stop valve has no fault when the detected temperature difference acquired at any time is greater than or equal to the preset temperature difference; the determining unit 306 is further configured to: and determining that the stop valve is in fault only when the temperature difference acquired last time is detected to be less than or equal to the preset temperature difference.
In the embodiment, the coil temperature of the indoor heat exchanger is collected for the appointed times in the preset time period, a data basis is provided for the determination of whether the stop valve is in failure, the temperature difference between the coil temperature collected at any time and the preset temperature is calculated in real time, the determination of whether the stop valve is in failure is facilitated, the stop valve is determined to be free of failure when the temperature difference collected at any time is detected to be larger than or equal to the preset temperature difference, the detection program for determining the failure of the stop valve is facilitated to be saved, the stop valve is determined to be in failure only when the temperature difference collected at the last time is detected to be smaller than or equal to the preset temperature difference, the operation reliability of the air conditioner is facilitated to be improved, the phenomenon of high-temperature demagnetization of a compressor caused by the fact that the stop valve is not opened or the stop valve is failed is effectively reduced, and the, the simplicity and feasibility are high.
It should be noted that, the fault detection method provided by the present invention is generally started at the initial startup after the installation or the maintenance is completed, and the fault detection method is suitable for both the air conditioner of a single indoor unit and the air conditioners of a plurality of indoor units, that is, a multi-split air conditioning system.
Specifically, when the multi-split air conditioning system is used, the coil temperature of the indoor heat exchanger of each indoor unit in operation is collected for a specified number of times within a preset time period, the stop valve is determined to be fault-free as long as the collected temperature difference is greater than or equal to the preset temperature difference, and the stop valve is determined to be fault only when the temperature difference collected for the last time of each indoor unit in operation is less than the preset temperature difference, wherein the fault of the stop valve includes that the stop valve is not opened.
It should be further noted that the coil temperature of the indoor heat exchanger collected for the specified times in the preset time period may be collected once every 30 seconds in the preset time period, or may be collected for multiple times at different time intervals.
In any one of the above embodiments, preferably, the method further includes: the first detecting unit 308 is configured to detect a coil temperature of the indoor heat exchanger when the initial power-on command signal is received, and determine the coil temperature as a preset temperature.
In this embodiment, through when receiving initial start-up command signal, detect the coil pipe temperature of indoor heat exchanger, and confirm to predetermine the temperature, with the coil pipe temperature of indoor heat exchanger when receiving initial start-up command signal as the contrast parameter, be more favorable to judging whether there is the refrigerant circulation in the indoor heat exchanger, thereby whether more accurate judgement stop valve is out of order, whether opened, promote the reliability that the stop valve trouble was confirmed, be favorable to the fault check of pertinence, be favorable to reducing the phenomenon of compressor high temperature demagnetization that leads to because of not opening stop valve or stop valve trouble.
It should be noted that the initial boot instruction signal is generally an initial boot start signal after installation or maintenance is completed.
In any one of the above embodiments, preferably, the method further includes: the second detecting unit 310 is configured to detect an indoor ambient temperature of the indoor unit when the initial power-on instruction signal is received, and determine the indoor ambient temperature as a preset temperature.
In the embodiment, when the initial starting instruction signal is received, the indoor environment temperature where the indoor unit is located is detected and determined to be the preset temperature, and the indoor environment temperature where the indoor unit is located when the initial starting instruction signal is received is used as a comparison parameter, so that whether a refrigerant flows in the indoor heat exchanger or not is more favorably judged, whether the stop valve is in a fault or not is more accurately judged, whether the stop valve is opened or not is judged, the reliability of the stop valve fault determination is improved, the targeted fault detection is favorably realized, and the phenomenon of high-temperature demagnetization of the compressor caused by the fact that the stop valve is not opened or the stop valve is in a fault is favorably reduced.
It should be noted that the initial boot instruction signal is generally an initial boot start signal after installation or maintenance is completed.
In any one of the above embodiments, preferably, the method further includes: the determining unit 312 is configured to determine whether all temperature differences acquired within a preset time period corresponding to the same indoor unit are smaller than a preset temperature difference; the generating unit 314 is configured to generate an abnormal prompt message for the corresponding indoor unit when it is determined that all the temperature differences acquired within the preset time period corresponding to the same indoor unit are less than the preset temperature difference.
In this embodiment, it is beneficial to determine whether the indoor units are abnormal by determining whether all the temperature differences acquired within the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference, and it is beneficial to prompt the user to check the situations such as no remote control signal being received or abnormality of the electronic expansion valve in time by generating the abnormal prompt information of the corresponding indoor unit when it is determined that all the temperature differences acquired within the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference.
In any of the above embodiments, preferably, the value range of the preset time period is 3min to 6min, and the value range of the preset temperature difference is 2 ℃ to 5 ℃.
In the embodiment, the value range of the preset time period is 3-6 min, so that on one hand, the risk of high-temperature demagnetization of the compressor caused by long running time under the condition of stop valve failure is reduced, on the other hand, the phenomenon of misjudgment of stop valve failure caused by unobvious temperature change caused by short running time under lower power is reduced, the reliability of stop valve failure determination is further improved by presetting the value range of temperature difference to be 2-5 ℃, and the phenomenon of high-temperature demagnetization of the compressor caused by non-opening of the stop valve or stop valve failure is favorably reduced.
FIG. 4 shows a schematic block diagram of an air conditioner 400 according to an embodiment of the present invention;
fig. 5 shows an enlarged schematic view at a in fig. 4.
As shown in fig. 4 and 5, according to the air conditioner 400 of the embodiment of the present invention, the air conditioner 400 includes an indoor unit 402 and an outdoor unit 404, a connection pipe between the indoor unit 402 and the outdoor unit 404 is provided with a stop valve 408, the indoor unit 402 is further provided with an indoor heat exchanger, and the air conditioner 400 further includes: the failure detection apparatus 300 according to any one of the embodiments of the present invention described above.
In this embodiment, the air conditioner 400 includes any one of the fault detection devices 300 proposed in the embodiments of the present invention, and therefore, all the advantages of having any one of the fault detection devices 300 proposed in the embodiments of the present invention are not described herein again.
Specifically, as shown in fig. 4 and 5, the air conditioner 400 is a one-to-four system, and includes an outdoor unit 404 and four indoor units 402, a stop valve 408 is disposed on a communication pipeline between the outdoor unit 404 and the indoor unit 402, the stop valve 408 includes a vacuum needle valve 412, each indoor unit 402 corresponds to an electronic expansion valve 410, and the air conditioner 400 further includes a compressor 406 communicated with the outdoor unit 404 and the indoor unit 402 on the communication pipeline between the stop valve 408 and the indoor unit 402.
Fig. 6 shows a schematic flow diagram of a fault detection method according to a further embodiment of the invention.
As shown in fig. 6, a fault detection method according to still another embodiment of the present invention includes:
s602, receiving an initial starting command signal;
s604, detecting indoor environment temperature T1 and indoor heat exchanger coil temperature T2;
s606, detecting T2n every n seconds;
s608, judging whether the difference between T2n and T2 is greater than or equal to 3 ℃;
if the determination at S608 is yes, S612 is performed, and it is determined that the cut-off valve is open;
if the determination at S608 is no, S610 is executed to determine that the shutoff valve is not opened.
Specifically, taking a one-to-two air conditioner as an example, when a starting command signal of 17 ℃ high wind for starting and cooling is received, the indoor environment temperature T1 is synchronously detected to be 26.0 ℃, the indoor heat exchanger coil temperature T2 is detected to be 26.5 ℃, and the indoor heat exchanger coil temperature T2n (A) and the indoor heat exchanger coil temperature T2 (T2) of the indoor unit A are sequentially detected every 30s30(A)＝26.5℃，T290(A)＝26.5℃，T2300(A) 26.5 ℃, coil temperature of indoor heat exchanger of indoor unit B, T2n (B), T230(B)＝26.5℃，T290(B)＝26.5℃，T2300(B) When the temperature difference between the T2n and the initial T2 of each indoor unit is less than 3 ℃, the stop valve is not opened when the temperature is 26.5 ℃.
If the temperature T2n (A) of the coil pipe of the indoor heat exchanger of the indoor unit A is detected every 30s in sequence, T230(A)＝26.5℃，T290(A)＝26.5℃，T2300(A) 26.5 ℃, coil temperature of indoor heat exchanger of indoor unit B, T2n (B), T230(B)＝22.5℃，T290(B)＝16.5℃，T2300(B) When the temperature difference between the B indoor unit T2n (B) and the initial T2 is larger than or equal to 3 ℃ at 12.5 ℃, the stop valve is opened, the refrigerant flows in the air conditioner system, the A indoor unit is abnormal, and the abnormality of the A indoor unit needs to be further detected to carry out remote control signalingThe detection of the conditions such as abnormity of the electronic expansion valve and the like does not cause the high-temperature demagnetization of the compressor generally.
Fig. 7 shows a schematic flow diagram of a fault detection method according to a further embodiment of the invention.
As shown in fig. 7, a fault detection method according to still another embodiment of the present invention includes:
s702, receiving an initial starting instruction signal;
s704, detecting indoor environment temperature T1 and indoor heat exchanger coil temperature T2;
s706, detecting T2n every n seconds;
s708, judging whether the difference between T2n and T1 is greater than or equal to 3 ℃;
if the determination at S708 is yes, then S712 is executed, and it is determined that the shut-off valve is open;
if the determination at S708 is no, S710 is executed to determine that the shutoff valve is not opened.
Specifically, taking a one-to-two air conditioner as an example, when a starting command signal of 17 ℃ high wind for starting and cooling is received, the indoor environment temperature T1 is synchronously detected to be 26.0 ℃, the indoor heat exchanger coil temperature T2 is detected to be 26.5 ℃, and the indoor heat exchanger coil temperature T2n (A) and the indoor heat exchanger coil temperature T2 (T2) of the indoor unit A are sequentially detected every 30s30(A)＝26.5℃，T290(A)＝26.5℃，T2300(A) 26.5 ℃, coil temperature of indoor heat exchanger of indoor unit B, T2n (B), T230(B)＝26.5℃，T290(B)＝26.5℃，T2300(B) When the temperature difference between the T2n and the initial T1 of each indoor unit is less than 3 ℃, the stop valve is not opened when the temperature is 26.5 ℃.
If the temperature T2n (A) of the coil pipe of the indoor heat exchanger of the indoor unit A is detected every 30s in sequence, T230(A)＝26.5℃，T290(A)＝26.5℃，T2300(A) 26.5 ℃, coil temperature of indoor heat exchanger of indoor unit B, T2n (B), T230(B)＝22.5℃，T290(B)＝16.5℃，T2300(B) When the temperature difference between the B indoor unit T2n (B) and the initial T1 is larger than or equal to 3 ℃ at 12.5 ℃, the stop valve is opened, the refrigerant flows in the air conditioner system, the A indoor unit is abnormal, and the abnormality of the A indoor unit needs to be further detected to carry out remote control signalingThe detection of the conditions such as abnormity of the electronic expansion valve and the like does not cause the high-temperature demagnetization of the compressor generally.
The technical scheme of the invention is described in detail by combining the attached drawings, and the invention provides a fault detection method, a fault detection device, an air conditioner and a computer readable storage medium.
The steps in the method of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The units in the device of the invention can be merged, divided and deleted according to actual needs.
It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by instructions associated with a program, which may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), compact disc-Read-Only Memory (CD-ROM), or other Memory, magnetic disk, magnetic tape, or magnetic tape, Or any other medium which can be used to carry or store data and which can be read by a computer.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A fault detection method is suitable for an air conditioner and is characterized in that the air conditioner is provided with an indoor unit and an outdoor unit, a communication pipeline between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is further provided with an indoor heat exchanger, and the fault detection method comprises the following steps:
collecting the coil temperature of the indoor heat exchanger for a specified number of times within a preset time period;
calculating the temperature difference between the temperature of the coil pipe acquired at any time and a preset temperature in real time;
when the temperature difference acquired at any time is detected to be larger than or equal to the preset temperature difference, determining that the stop valve has no fault;
when the temperature difference acquired each time is smaller than the preset temperature difference, determining that the stop valve has a fault;
when the temperature difference detected to be collected at any time is greater than or equal to the preset temperature difference, after the stop valve is determined to be fault-free, the method further comprises the following steps:
judging whether all the temperature differences acquired in the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference or not;
when all the temperature differences acquired within the preset time period and corresponding to the same indoor unit are judged to be smaller than the preset temperature difference, generating abnormal prompt information corresponding to the indoor unit;
the value range of the preset time period is 3-6 min.
2. A fault detection method is suitable for an air conditioner and is characterized in that the air conditioner is provided with an indoor unit and an outdoor unit, a communication pipeline between the indoor unit and the outdoor unit is provided with a stop valve, the indoor unit is further provided with an indoor heat exchanger, and the fault detection method comprises the following steps:
collecting the coil temperature of the indoor heat exchanger for a specified number of times within a preset time period;
calculating the temperature difference between the temperature of the coil pipe acquired at any time and a preset temperature in real time;
when the temperature difference acquired at any time is detected to be larger than or equal to the preset temperature difference, determining that the stop valve has no fault;
determining that the stop valve is in fault only when the temperature difference acquired last time is detected to be less than or equal to the preset temperature difference;
when the temperature difference detected to be collected at any time is greater than or equal to the preset temperature difference, after the stop valve is determined to be fault-free, the method further comprises the following steps:
judging whether all the temperature differences acquired in the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference or not;
when all the temperature differences acquired within the preset time period and corresponding to the same indoor unit are judged to be smaller than the preset temperature difference, generating abnormal prompt information corresponding to the indoor unit;
the value range of the preset time period is 3-6 min.
3. The fault detection method according to claim 1 or 2, wherein before collecting the coil temperature of the indoor heat exchanger for a specified number of times within a preset time period, the method further comprises:
and when an initial starting command signal is received, detecting the temperature of the coil of the indoor heat exchanger, and determining the temperature as the preset temperature.
4. The fault detection method according to claim 1 or 2, wherein before collecting the coil temperature of the indoor heat exchanger for a specified number of times within a preset time period, the method further comprises:
and when an initial starting command signal is received, detecting the indoor environment temperature of the indoor unit, and determining the indoor environment temperature as the preset temperature.
5. The fault detection method according to claim 1 or 2,
the value range of the preset temperature difference is 2-5 ℃.
6. The utility model provides a fault detection device, is applicable to the air conditioner, its characterized in that, the air conditioner is equipped with indoor set and off-premises station, indoor set with the intercommunication pipeline between the off-premises station is equipped with the stop valve, indoor set still is equipped with indoor heat exchanger, fault detection device includes:
the acquisition unit is used for acquiring the coil temperature of the indoor heat exchanger for specified times within a preset time period;
the calculating unit is used for calculating the temperature difference between the temperature of the coil pipe acquired at any time and a preset temperature in real time;
the determining unit is used for determining that the stop valve has no fault when the temperature difference acquired at any time is detected to be larger than or equal to the preset temperature difference;
the determination unit is further configured to: when the temperature difference acquired each time is smaller than the preset temperature difference, determining that the stop valve has a fault;
the judging unit is used for judging whether all the temperature differences collected in the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference or not;
the generating unit is used for generating abnormal prompt information of the corresponding indoor unit when all the temperature differences acquired in the preset time period corresponding to the same indoor unit are judged to be smaller than the preset temperature difference;
the value range of the preset time period is 3-6 min.
7. The utility model provides a fault detection device, is applicable to the air conditioner, its characterized in that, the air conditioner is equipped with indoor set and off-premises station, indoor set with the intercommunication pipeline between the off-premises station is equipped with the stop valve, indoor set still is equipped with indoor heat exchanger, fault detection device includes:
the acquisition unit is used for acquiring the coil temperature of the indoor heat exchanger for specified times within a preset time period;
the calculating unit is used for calculating the temperature difference between the temperature of the coil pipe acquired at any time and a preset temperature in real time;
the determining unit is used for determining that the stop valve has no fault when the temperature difference acquired at any time is detected to be larger than or equal to the preset temperature difference;
the determination unit is further configured to: determining that the stop valve is in fault only when the temperature difference acquired last time is detected to be less than or equal to the preset temperature difference;
the judging unit is used for judging whether all the temperature differences collected in the preset time period corresponding to the same indoor unit are smaller than the preset temperature difference or not;
a generating unit, configured to generate an abnormal prompt message for the corresponding indoor unit when it is determined that all the temperature differences acquired within the preset time period corresponding to the same indoor unit are less than the preset temperature difference,
the value range of the preset time period is 3-6 min.
8. The fault detection device according to claim 6 or 7, further comprising:
and the first detection unit is used for detecting the temperature of the coil pipe of the indoor heat exchanger when receiving an initial starting instruction signal and determining the temperature as the preset temperature.
9. The fault detection device according to claim 6 or 7, further comprising:
and the second detection unit is used for detecting the indoor environment temperature of the indoor unit when receiving the initial starting instruction signal and determining the indoor environment temperature as the preset temperature.
10. The failure detection device according to claim 6 or 7,
the value range of the preset temperature difference is 2-5 ℃.
11. The utility model provides an air conditioner, its characterized in that, air conditioner is equipped with indoor set and off-premises station, indoor set with the intercommunication pipeline between the off-premises station is equipped with the stop valve, indoor set still is equipped with indoor heat exchanger, air conditioner still includes:
a fault detection device as claimed in any one of claims 6 to 10.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the fault detection method according to any one of claims 1 to 5.
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CN110398035B (en) * 2019-07-24 2021-02-09 广东美的暖通设备有限公司 Air conditioner indoor fan fault detection method and device and readable storage medium
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