CN115235041A - Air conditioner fault detection method and device and air conditioner - Google Patents

Air conditioner fault detection method and device and air conditioner Download PDF

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Publication number
CN115235041A
CN115235041A CN202210841803.4A CN202210841803A CN115235041A CN 115235041 A CN115235041 A CN 115235041A CN 202210841803 A CN202210841803 A CN 202210841803A CN 115235041 A CN115235041 A CN 115235041A
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air conditioner
temperature
state
current
determining
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CN202210841803.4A
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CN115235041B (en
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马赞
卢品同
杜沈飞
黄龙
杨超
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Zhuzhou Megmeet Electric Co ltd
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Zhuzhou Megmeet Electric 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56—Remote control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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

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

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioner fault detection method and device and an air conditioner. The air conditioner fault detection method comprises the following steps: dynamically acquiring the temperature of an outer disc of an air conditioner, the temperature of an outer ring and the frequency of a compressor; determining the temperature state of the air conditioner according to the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor; when the temperature state of the air conditioner is an abnormal temperature state, acquiring gear information and working current of the air conditioner; determining the current state of the air conditioner according to the gear information and the working current; and when the current state of the air conditioner is an abnormal current state, determining that the air conditioner has a shielding fault. The invention can detect whether the outdoor fan of the air conditioner is shielded.

Description

Air conditioner fault detection method and device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner fault detection method and device and an air conditioner.
Background
When the traditional window type air conditioner is used, a window is closed by a person, so that an outdoor heat exchanger is blocked, and poor heat dissipation is caused. When the air conditioner is used for refrigeration, if the outdoor heat exchanger is blocked, the system pressure can be increased, certain potential safety hazards exist, meanwhile, the power of the air conditioner can be increased when the air conditioner is operated in the state, energy efficiency is reduced, and the power consumption is increased.
Disclosure of Invention
The embodiment of the invention provides an air conditioner fault detection method and device and an air conditioner, which can detect whether an outdoor heat exchanger of the air conditioner is shielded or not.
In order to solve the technical problem, one technical scheme adopted by the embodiment of the invention is as follows: provided is an air conditioner fault detection method, including: dynamically acquiring the temperature of an outer disc of the air conditioner, the temperature of an outer ring and the frequency of a compressor; determining the temperature state of the air conditioner according to the outer disc temperature, the outer ring temperature and the compressor frequency; when the temperature state of the air conditioner is an abnormal temperature state, acquiring gear information and working current of the air conditioner; determining the current state of the air conditioner according to the gear information and the working current; and when the current state of the air conditioner is an abnormal current state, determining that the air conditioner has a shielding fault.
In some embodiments, the dynamically obtaining the outer disc temperature, the outer ring temperature and the compressor frequency of the air conditioner comprises: and acquiring the outer disc temperature, the outer ring temperature and the compressor frequency according to a preset time period, wherein the outer disc temperature and the outer ring temperature acquired at the same time are a group of temperatures.
In some embodiments, the determining the temperature state of the air conditioner according to the outer disc temperature, the outer ring temperature, and the compressor frequency comprises: in a first time period, determining the temperature state of the air conditioner according to the temperature of the outer disc and the temperature of the outer ring; the first time period is a time period from a first moment to a second moment of the air conditioner, and the first moment is the moment when the air conditioner starts to operate; in a second time interval, determining the temperature state of the air conditioner according to the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor; the second time period is a time period from the second moment to a third moment of the air conditioner.
In some embodiments, the determining the temperature state of the air conditioner according to the outer disk temperature and the outer ring temperature during the first period of time includes: in the first time interval, subtracting the outer ring temperature in the same group of temperatures from the outer disk temperature in each group of temperatures to obtain the temperature difference of each group of temperatures; subtracting the temperature difference of the first half time period from the temperature difference of the second half time period of the first time period to obtain a plurality of groups of temperature change values; and determining the temperature state of the air conditioner according to the temperature change value.
In some embodiments, the determining the temperature state of the air conditioner according to the outer disc temperature, the outer ring temperature and the compressor frequency during the second period of time includes: determining the frequency state of the air conditioner according to the compressor frequency in the second time interval; when the frequency state of the air conditioner is a high-frequency state, subtracting the outer ring temperature in the same group of temperatures from the outer disc temperature in each group of temperatures to obtain the temperature difference of each group of temperatures; subtracting the temperature difference of the first half time period of the second time period from the temperature difference of the second half time period to obtain a plurality of groups of temperature change values; and determining the temperature state of the air conditioner according to the temperature change value.
In some embodiments, the determining the current state of the air conditioner according to the gear information and the operating current includes: acquiring a standard working current and a standard current difference of the air conditioner according to the gear information; subtracting the standard working current from the working current to obtain a current difference; and determining the current state of the air conditioner according to the current difference and the standard current difference.
In some embodiments, after it is determined that the air conditioner has the shielding failure, the air conditioner failure detection method further includes: and sending a fault prompt to a user and controlling the air conditioner to be shut down.
In order to solve the above technical problem, another technical solution adopted by the embodiment of the present invention is: provided is an air conditioner fault detection apparatus including: the first acquisition module is used for acquiring the temperature of an outer disc of the air conditioner, the temperature of an outer ring and the frequency of a compressor; the first determining module is used for determining the temperature state of the air conditioner according to the outer disc temperature, the outer ring temperature and the compressor frequency; the second acquisition module is used for acquiring the gear information and the working current of the air conditioner when the temperature state of the air conditioner is an abnormal temperature state; the second determining module is used for determining the current state of the air conditioner according to the gear information and the working current; and the third determining module is used for determining that the air conditioner has a shielding fault when the current state of the air conditioner is an abnormal current state.
In order to solve the above technical problem, another technical solution adopted by the embodiment of the present invention is: provided is an air conditioner including: a compressor; a first temperature sensor for detecting an outer panel temperature of the air conditioner; the second temperature sensor is used for detecting the temperature of the outer ring of the air conditioner; a first current sensor for detecting an operating current of the air conditioner; a controller connected to the compressor, the first temperature sensor, the second temperature sensor, and the first current sensor, respectively, the controller including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the air conditioner fault detection method as described above.
In order to solve the above technical problem, another technical solution adopted by the embodiment of the present invention is: there is provided a non-transitory computer-readable storage medium storing computer-executable instructions that, when executed by an electronic device, cause the electronic device to perform the air conditioner fault detection method as described above.
Different from the situation of the related art, the embodiment of the invention provides an air conditioner fault detection method and device and an air conditioner. Firstly, dynamically acquiring the temperature of an outer disc of an air conditioner, the temperature of an outer ring and the frequency of a compressor; secondly, determining the temperature state of the air conditioner according to the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor; then when the temperature state of the air conditioner is an abnormal temperature state, acquiring gear information and working current of the air conditioner; determining the current state of the air conditioner according to the gear information and the working current; and finally, when the current state of the air conditioner is an abnormal current state, determining that the air conditioner has a shielding fault. The invention can detect whether the outdoor fan of the air conditioner is shielded or not.
Drawings
One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.
Fig. 1 is a block diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a hardware configuration of a controller provided in FIG. 1;
fig. 3 is a schematic flow chart of an air conditioner fault detection method according to an embodiment of the present invention;
FIG. 4 is a detailed flowchart of step S2 in FIG. 3;
FIG. 5 is a detailed flowchart of step S21 in FIG. 4;
FIG. 6 is a detailed flowchart of step S22 in FIG. 4;
fig. 7 is a broken-line schematic diagram of the relationship between the fan current of the air conditioner and the rotational speed of the extension set when the outdoor fan of the air conditioner has shielding and no shielding.
FIG. 8 is a detailed flowchart of step S4 in FIG. 3;
fig. 9 is a schematic structural diagram of an air conditioner fault detection device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, if not conflicted, the various features of the embodiments of the invention may be combined with each other within the scope of protection of the invention. Additionally, while functional block divisions are performed in the device diagrams, with logical sequences shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than the block divisions in the device diagrams, or the flowcharts.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Generally, when an outdoor fan of a window type air conditioner is shielded, the outdoor heat exchanger of the window type air conditioner cannot radiate heat well, and meanwhile, the operating power of the air conditioner is increased, so that the energy efficiency is improved. The embodiment of the invention provides an air conditioner fault detection method and device and an air conditioner, which can detect whether an outdoor fan of a window type air conditioner is shielded or not.
Referring to fig. 1, fig. 1 is a block diagram of an air conditioner 100 according to an embodiment of the present invention. As shown in fig. 1, the air conditioner 100 includes: a first temperature sensor 10, a second temperature sensor 20, a first current sensor 30, a compressor 40, and a controller 50.
The air conditioner 100 according to the embodiment of the present invention may be a window type air conditioner. A window type air conditioner is an air conditioner that can be installed on a window. The window type air conditioner adopts a compression refrigeration and heat supply method to cool or heat the room so as to obtain a relatively constant environmental temperature. The outdoor heat exchanger (condenser) of the window type air conditioner extends out of the room, and the indoor heat exchanger (evaporator) is arranged indoors.
The compressor 40 is provided in the air conditioner 100, and the compressor 40 functions to compress a driving refrigerant in an air conditioning refrigerant circuit.
The first temperature sensor 10 is disposed on a coil surface of an outdoor heat exchanger of the air conditioner 100, and detects an outer coil temperature of the air conditioner 100.
The second temperature sensor 20 is disposed at an outdoor air inlet grille of the air conditioner 100 (an outdoor fan of a window type air conditioner is a suction fan), and is configured to detect an outer ring temperature of the air conditioner 100.
Specifically, the first temperature sensor 10 and the second temperature sensor 20 may be thermistors.
The first current sensor 30 is connected to a driving circuit of an outdoor fan of the air conditioner 100, and is configured to detect an operating current of the air conditioner 100, where the operating current is a fan current of the outdoor fan of the air conditioner 100.
The controller 50 is connected to the compressor 40, the first temperature sensor 10, the second temperature sensor 20, and the first current sensor 30. The controller 50 may acquire a compressor frequency of the compressor 40, may acquire an outer disk temperature detected by the first temperature sensor 10, may acquire an outer ring temperature detected by the second temperature sensor 20, and may acquire an operating current detected by the first current sensor 30.
The controller 50 dynamically acquires the outer disc temperature, the outer ring temperature and the compressor frequency of the air conditioner; determining the temperature state of the air conditioner 100 according to the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor; when the temperature state of the air conditioner 100 is an abnormal temperature state, acquiring gear information and working current of the air conditioner 100; then, determining the current state of the air conditioner 100 according to the gear information and the working current; and finally, when the current state of the air conditioner 100 is the abnormal current state, determining that the air conditioner 100 has a shielding fault. Therefore, the embodiment of the present invention can detect whether the outdoor portion of the air conditioner 100 is blocked.
The controller 50 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a PLC, a Field Programmable Gate Array (FPGA), a single chip, an ARM (Acorn RISC Machine) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. Also, the controller 50 may be any conventional processor, controller, microcontroller, or state machine. The controller 50 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
Referring to fig. 2, fig. 2 is a schematic diagram of a hardware structure of the controller in fig. 1. As shown in fig. 2, the controller 50 includes one or more processors 501 and memory 502. In fig. 2, one processor 501 is taken as an example.
The processor 501 and the memory 502 may be connected by a bus or other means, such as the bus connection in fig. 2.
The memory 502 is used as a non-volatile computer-readable storage medium for storing non-volatile software programs, non-volatile computer-executable programs, modules, and the like, such as program instructions corresponding to the methods in the following embodiments of the present invention and modules corresponding to the apparatuses in the following embodiments of the present invention. The processor 501 executes various functional applications and data processing of an air conditioner fault detection method by running nonvolatile software programs, instructions, and modules stored in the memory 502, that is, functions of one of the following method embodiments and the respective modules of the following device embodiments are realized.
The memory 502 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of an air conditioner fault detection apparatus, and the like.
Further, the memory 502 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 502 comprises memory located remotely from processor 501, which may be connected to processor 501 through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Program instructions and one or more modules are stored in memory 502 and, when executed by the one or more processors 501, perform the steps of a method for detecting air conditioning faults in any of the method embodiments described below or implement the functions of the modules of a device for detecting air conditioning faults in any of the device embodiments described below.
The product can execute the air conditioner fault detection method provided by the following embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For details of the air conditioner fault detection method provided in the following embodiments of the present invention, reference may be made to the following embodiments.
Referring to fig. 3, fig. 3 is a schematic flow chart illustrating an air conditioner fault detection method according to an embodiment of the present invention. As shown in fig. 3, the air conditioner fault detection method includes:
step S1, dynamically acquiring the outer disc temperature Tp, the outer ring temperature Tw and the compressor frequency F of the air conditioner.
And S2, determining the temperature state of the air conditioner according to the outer disc temperature Tp, the outer ring temperature Tw and the compressor frequency F.
The temperature state of the air conditioner comprises a normal temperature state and an abnormal temperature state.
If when the air conditioner refrigeration operation, because some reasons, for example the user closes the window by mistake, lead to the outdoor fan of air conditioner to be sheltered from, it is bad to make the outdoor heat exchanger heat transfer to outer loop temperature Tw can constantly rise to a definite value. At this time, it can be determined that the air conditioner is in an abnormal temperature state by the difference between the outer disc temperature Tp and the outer ring temperature Tw.
And S3, acquiring gear information and working current of the air conditioner when the temperature state of the air conditioner is an abnormal temperature state.
The gear information of the air conditioner is gear information of air outlet of the air conditioner. The gear information includes 1 gear, 2 gear, 3 gear and up to n gear, and the outlet air of the air conditioner can be larger along with the increase of the gear.
The working current of the air conditioner is the fan current of the outdoor fan when the air conditioner operates.
And S4, determining the current state of the air conditioner according to the gear information and the working current.
The current state of the air conditioner comprises a normal current state and an abnormal current state.
If when the air conditioner is in refrigeration operation, for some reasons, for example, a user closes a window by mistake, an outdoor fan of the air conditioner is blocked, the wind resistance of the outdoor fan is increased, and the working current at the moment is larger than that under the normal condition. The current state of the air conditioner can be judged by comparing the fan current (namely working current) of the outdoor fan during actual operation with the fan current in a normal state. If the current state of the air conditioner is an abnormal current state, the wind resistance of the outdoor fan is normal, and if the wind resistance of the outdoor fan is abnormal, the outdoor fan of the air conditioner is shielded.
And S5, when the current state of the air conditioner is the abnormal current state, determining that the shielding fault exists in the air conditioner.
When the air conditioner is in an abnormal temperature state and an abnormal current state at the same time, the fact that the air conditioner has a shielding fault can be determined, namely the outdoor fan of the air conditioner has shielding.
In some embodiments, dynamically obtaining the outer disc temperature, the outer ring temperature, and the compressor frequency of the air conditioner includes: step S11, acquiring an outer disc temperature Tp, an outer ring temperature Tw and a compressor frequency F according to a preset time interval, wherein the outer disc temperature Tp and the outer ring temperature Tw acquired at the same time are a group of temperatures.
Specifically, the outer disc temperature Tp, the outer ring temperature Tw, and the compressor frequency F may be acquired every preset time period, for example, every 1 second. The outer disk temperature Tp and the outer ring temperature Tw acquired at the same time are a set of temperatures. For example, the outer disk temperature Tp1 and the outer ring temperature Tw1 acquired at the 1 st second are the 1 st group temperatures, the outer disk temperature Tp2 and the outer ring temperature Tw2 acquired at the 2 nd second are the 2 nd group temperatures, the outer disk temperature Tp3 and the outer ring temperature Tw3 acquired at the 3 rd second are the 3 rd group temperatures, and up to the outer disk temperature Tpn and the outer ring temperature Twn acquired at the n th second are the n th group temperatures.
In some embodiments, referring to fig. 4, determining the temperature status of the air conditioner according to the outer disc temperature, the outer ring temperature and the compressor frequency includes:
step S21, in the first period, determines the temperature state of the air conditioner according to the outer disk temperature Tp, the outer ring temperature Tw. The first time interval is a time interval from the first moment to the second moment of the air conditioner, and the first moment is the moment when the air conditioner starts to operate.
And S22, determining the temperature state of the air conditioner according to the outer disc temperature Tp, the outer ring temperature Tw and the compressor frequency F in the second time period. The second time interval is a time interval from the second moment to the third moment.
Wherein the frequency states of the air conditioner are divided into a high frequency state and a low frequency state.
In particular, a standard compressor frequency Fa is set, for example 50Hz.
And when the compressor frequency F of the air conditioner is greater than the standard compressor frequency Fa, determining that the frequency state of the air conditioner is a high-frequency state. When the compressor frequency F of the air conditioner is less than or equal to the standard compressor frequency Fa, the frequency state of the air conditioner is determined to be a low frequency state.
The second moment is the moment when the compressor frequency F of the air conditioner is equal to the standard compressor Fa. The first period is a period in which the air conditioner is in a low frequency state. The first period of time is typically several minutes, such as one or two minutes. The second period is a period in which the air conditioner is in a high frequency state.
When the air conditioner is used for cooling, in the first time interval, the temperature difference T between the outer ring temperature Tw and the outer disc temperature Tp of the air conditioner is increased slowly under normal conditions, and the change rate of the temperature difference T is large. When the outdoor fan of the air conditioner is shielded, the outer ring temperature Tw rises, so that the change rate of the temperature difference T between the outer ring temperature Tw shielded by the outdoor fan of the air conditioner and the outer disc temperature Tp is smaller than that of the temperature difference T between the outer ring temperature Tw and the outer disc temperature Tp under the normal condition.
When the air conditioner is used for cooling, in the second period, the temperature difference T between the outer ring temperature Tw of the air conditioner and the outer disc temperature Tp is normally large, but the rate of change of the temperature difference T is small. When the outdoor fan of the air conditioner is shielded, the outer ring temperature Tw also rises, so that the change rate of the temperature difference T between the outer ring temperature Tw and the outer disc temperature Tp of the air conditioner, which is shielded by the outdoor fan, is larger than the change rate of the temperature difference T between the outer ring temperature Tw and the outer disc temperature Tp under the normal condition.
In some embodiments, referring to fig. 5, in the first period, determining the temperature state of the air conditioner according to the temperature of the outer disc and the temperature of the outer ring includes:
in step S211, in the first period, the outer disk temperature Tp in each set of temperatures is subtracted by the outer ring temperature Tw in the same set of temperatures, and the temperature difference T for each set of temperatures is obtained.
And when the compressor frequency F of the air conditioner is greater than the standard compressor frequency Fa, determining that the frequency state of the air conditioner is a high-frequency state. When the compressor frequency F of the air conditioner is less than or equal to the standard compressor frequency Fa, the frequency state of the air conditioner is determined to be a low frequency state. The first period is a period in which the air conditioner is in a low frequency state.
Step S212, the temperature difference of the second half period of the first period is subtracted from the temperature difference of the first half period of the first period, and a plurality of groups of temperature change values T' are obtained.
And step S213, determining the temperature state of the air conditioner according to the temperature change value.
Specifically, a standard temperature variation value Ta, for example, 5 degrees celsius, is set.
For example, in the first time period, if the outer disk temperature Tp, the outer ring temperature Tw, and the compressor frequency are acquired every 1 second, and the second time is the 60 th second when the air conditioner starts to operate, the duration of the first time period is 60 seconds. For example, the outer disk temperature Tp1 and the outer ring temperature Tw1 acquired at the 1 st second are the 1 st group temperature, the temperature difference T1= Tp1-Tw1 of the 1 st group temperature, the outer disk temperature Tp2 and the outer ring temperature Tw2 acquired at the 2 nd second are the 2 nd group temperature, the temperature difference T2= Tp2-Tw2 of the 2 nd group temperature, the outer disk temperature Tp3 and the outer ring temperature Tw3 acquired at the 3 rd second are the 3 rd group temperature, the temperature difference T3= Tp3-Tw3 of the 3 rd group temperature, and so on, and the outer disk temperature Tp60 and the outer ring temperature Tw60 acquired until the 60 th second are the 60 th group temperature, and the temperature difference T60 of the 60 th group temperature = Tp60-Tw60. Then, 30 sets of temperature change values T ' are obtained, i.e., the 1 st set of temperature change values T1' = T31-T1, the 2 nd set of temperature change values T2' = T32-T2, the 3 rd set of temperature change values T3' = T33-T3, and so on, and the 30 th set of temperature change values T30' = T60-T30.
Specifically, in the first period, first, 60 temperature differences T for the first period are calculated. Then, 30 sets of temperature variation values T' are obtained by subtracting the temperature difference T of the first 30 seconds of the first period from the temperature difference T of the last 30 seconds of the first period. Next, it is judged whether the temperature change values T' of all the 30 groups are greater than or equal to the standard temperature difference Ta. If the temperature variation values T' of all the 30 groups are greater than or equal to the standard temperature difference Ta, it is determined that the temperature state of the air conditioner is the normal temperature state in the first period, and then it is continued to determine the temperature state of the air conditioner in the second period. And if at least one temperature change value in the temperature change values T' of all the 30 groups is smaller than the standard temperature difference Ta, determining that the temperature state of the air conditioner in the first period is an abnormal temperature state, and then judging the current state of the air conditioner.
In some embodiments, referring to fig. 6, the determining the temperature state of the air conditioner according to the outer disc temperature, the outer ring temperature and the compressor frequency during the second period of time includes:
and step S221, determining the frequency state of the air conditioner according to the frequency F of the compressor in the second time interval.
In particular, a standard compressor frequency Fa is set, for example 50Hz.
And when the compressor frequency F of the air conditioner is greater than the standard compressor frequency Fa, determining that the frequency state of the air conditioner is a high-frequency state. And when the compressor frequency F of the air conditioner is less than or equal to the standard compressor frequency Fa, determining that the frequency state of the air conditioner is a low-frequency state. The second period is a period in which the air conditioner is in a high frequency state.
Step S222, when the frequency state of the air conditioner is the high frequency state, subtracting the outer ring temperature Tw in the same set of temperatures from the outer disc temperature Tp in each set of temperatures, and obtaining the temperature difference T of each set of temperatures.
Step S223 is to subtract the temperature difference in the second half period of the second time period from the temperature difference in the first half period of the second time period to obtain a plurality of sets of temperature variation values T'.
And S224, determining the temperature state of the air conditioner according to the temperature change value.
Specifically, a standard temperature variation value Ta, for example, 8 degrees celsius, is set.
For example, in the second time period, if the outer disk temperature Tp, the outer ring temperature Tw, and the compressor frequency are acquired every 1 second, and the second time is 61 th second after the air conditioner starts to operate, and the third time is 120 th second after the air conditioner starts to operate, the time duration of the second time period is 60 seconds.
Specifically, in the second period, first, 60 temperature differences T for the second period are calculated. Then, the temperature difference T of the second period of time, which is 30 seconds later, is subtracted from the temperature difference T of the second period of time, which is 30 seconds earlier, to obtain 30 sets of temperature variation values T'. Next, it is judged whether the temperature change values T' of all the 30 groups are greater than or equal to the standard temperature difference Ta. And if at least one temperature variation value in the temperature variation values T' of all the 30 groups is greater than or equal to the standard temperature difference Ta, determining that the temperature state of the air conditioner is an abnormal temperature state in the second time period, and then judging the current state of the air conditioner. And if the temperature change values T' of all the 30 groups are smaller than the standard temperature difference Ta, determining that the temperature state of the air conditioner is the normal temperature state in the second time period, and continuing to judge the temperature state of the air conditioner so as to monitor the temperature state of the air conditioner.
Referring to fig. 7, fig. 7 is a schematic broken-line diagram illustrating a relationship between a fan current and a fan speed of an air conditioner when an outdoor fan of the air conditioner has a shield and is not shielded and other conditions are the same.
A broken line Y1 in fig. 7 is a broken line of the relationship between the fan current and the fan rotation speed of the air conditioner when the outdoor fan of the air conditioner has a shield. A broken line Y2 in fig. 7 is a broken line of the relationship between the fan current and the fan rotation speed of the air conditioner when the outdoor fan of the air conditioner is not shielded.
As can be seen from fig. 7, the fan current of the outdoor fan during outdoor heat exchange without shielding is smaller than the fan current during shielding, and there is a certain current difference between the shielded fan current and the unshielded fan current.
In some embodiments, referring to fig. 8, determining the current state of the air conditioner according to the gear information and the operating current includes:
and S41, acquiring the standard working current and the standard current difference of the air conditioner according to the gear information.
The gear information of the air conditioner is gear information of air outlet of the air conditioner. The gear information includes 1 gear, 2 gear, 3 gear and up to n gear, and the outlet air of the air conditioner can be larger along with the increase of the gear.
The standard working current and the standard current difference are obtained and stored in advance and can be determined by research personnel after multiple tests.
And S42, subtracting the standard working current from the working current to obtain a current difference.
Specifically, the relationship between the shift information, the operating current I ', the standard operating current I, the current difference a' and the standard current difference a is shown in the following table one:
Figure BDA0003751394810000111
watch 1
In table one, the unit of the operating current I ', the standard operating current I, the current difference a' and the standard current difference a is amperes.
Where the standard current difference is set to a, e.g., 3 amps. When the gear of the air conditioner is 1 gear, the working current is I1', the standard working current is I1, and the current difference is I1' -I1= A1'. When the gear of the air conditioner is the 2 gear, the working current is I2', the standard working current is I2, and the current difference is I2' -I2= A1'. When the gear of the air conditioner is n gear, the working current is In ', the standard working current is In, and the current difference is In ' -In = An '.
And S43, determining the current state of the air conditioner according to the current difference and the standard current difference.
Specifically, whether the current difference A' is larger than the standard current difference A or not is judged, if not, the current state of the air conditioner is determined to be a normal current state, and if so, the current state of the air conditioner is determined to be an abnormal current state.
If the current state of the air conditioner is the abnormal current state, determining that the air conditioner has a shielding fault, namely the outdoor fan of the air conditioner has shielding. And if the current state of the air conditioner is the normal current state, the air conditioner normally runs and continuously acquires the working current of the air conditioner in real time so as to monitor the current state of the air conditioner.
For example, the standard current difference a may be set to be 5 amperes, the standard operating current I1 may be 20 amperes when the gear position of the air conditioner is 1 gear, and if the operating current I1 'is 27 amperes at this time, the current difference A1' is 7 amperes, and then the current state of the air conditioner is determined to be an abnormal current state.
In some embodiments, after it is determined that the air conditioner has the blocking fault, the air conditioner fault detection method further includes:
and S6, sending a fault prompt to a user, and controlling the air conditioner to shut down.
Specifically, when confirming that the air conditioner has the sheltering from trouble, can send the suggestion to the user through voice broadcast or the mode of lighting the pilot lamp, the shutdown of simultaneous control air conditioner.
The embodiment of the invention provides an air conditioner fault detection method, which comprises the steps of firstly, dynamically obtaining the temperature of an outer disc, the temperature of an outer ring and the frequency of a compressor of an air conditioner; secondly, determining the temperature state of the air conditioner according to the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor; then when the temperature state of the air conditioner is an abnormal temperature state, acquiring gear information and working current of the air conditioner; determining the current state of the air conditioner according to the gear information and the working current; and finally, when the current state of the air conditioner is the abnormal current state, determining that the air conditioner has a shielding fault. The embodiment of the invention can detect whether the outdoor fan of the air conditioner is shielded.
Referring to fig. 9, fig. 9 is a schematic diagram illustrating an air conditioner fault detection apparatus 600 according to an embodiment of the present invention, where the air conditioner fault detection apparatus 600 includes:
the first obtaining module 61 is configured to obtain an outer disc temperature, an outer ring temperature, and a compressor frequency of the air conditioner.
And a first determining module 62, configured to determine a temperature state of the air conditioner according to the outer disk temperature, the outer ring temperature, and the compressor frequency.
And a second obtaining module 63, configured to obtain the gear information and the working current of the air conditioner when the temperature state of the air conditioner is an abnormal temperature state.
And a second determining module 64 for determining the current state of the air conditioner according to the gear information and the working current.
And a third determining module 65, configured to determine that the air conditioner has a blocking fault when the current state of the air conditioner is an abnormal current state.
In some embodiments, the first obtaining module 61 is further configured to: according to a preset time period, the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor are obtained, and the temperature of the outer disc and the temperature of the outer ring which are obtained at the same moment are a set of temperatures.
In some embodiments, the first determination module 62 is further configured to: in a first time interval, determining the temperature state of the air conditioner according to the temperature of the outer disc and the temperature of the outer ring; the first time interval is a time interval from the first moment to the second moment of the air conditioner, and the first moment is the moment when the air conditioner starts to operate; in a second time interval, determining the temperature state of the air conditioner according to the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor; the second time period is a time period from the second moment to the third moment of the air conditioner.
In some embodiments, the first determination module 62 is further configured to: in a first time interval, subtracting the outer ring temperature in the same group of temperatures from the outer disk temperature in each group of temperatures to obtain the temperature difference of each group of temperatures; and subtracting the temperature difference of the first half period from the temperature difference of the second half period of the first period to obtain a plurality of groups of temperature change values, and determining the temperature state of the air conditioner according to the temperature change values.
In some embodiments, the first determination module 62 is further configured to: determining the frequency state of the air conditioner according to the frequency of the compressor in a second time interval; when the frequency state of the air conditioner is a high-frequency state, subtracting the outer ring temperature in the same group of temperatures from the outer disc temperature in each group of temperatures to obtain the temperature difference of each group of temperatures; subtracting the temperature difference of the first half time period of the second time period from the temperature difference of the second half time period to obtain a plurality of groups of temperature change values; and determining the temperature state of the air conditioner according to the temperature change value.
In some embodiments, the second determination module 64 is further configured to: acquiring standard working current and standard current difference of the air conditioner according to the gear information; subtracting the standard working current from the working current to obtain a current difference; and determining the current state of the air conditioner according to the current difference and the standard current difference.
In some embodiments, the air conditioner fault detection apparatus 600 further includes: and the indicating module 66 is used for sending a fault prompt to a user and controlling the air conditioner to be shut down.
The embodiment of the invention provides an air conditioner fault detection device, which firstly dynamically acquires the outer disc temperature, the outer ring temperature and the compressor frequency of an air conditioner; secondly, determining the temperature state of the air conditioner according to the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor; then when the temperature state of the air conditioner is an abnormal temperature state, acquiring gear information and working current of the air conditioner; determining the current state of the air conditioner according to the gear information and the working current; and finally, when the current state of the air conditioner is the abnormal current state, determining that the air conditioner has a shielding fault. According to the embodiment of the invention, whether the outdoor fan of the air conditioner is shielded or not can be detected.
It should be noted that the air conditioner fault detection apparatus may execute the air conditioner fault detection method provided by the embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. For details of the air conditioner fault detection method provided in the embodiments of the present invention, reference may be made to the technical details that are not described in detail in the embodiments of the spatial location device.
Embodiments of the present invention provide a non-volatile computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and when executed by an electronic device, the computer-executable instructions may cause the electronic device to perform steps of an air conditioner fault detection method in any of the above method embodiments, or implement functions of modules of an air conditioner fault detection apparatus in any of the above apparatus embodiments.
Embodiments of the present invention provide a computer program product comprising a computer program stored on a non-volatile computer-readable storage medium, the computer program comprising program instructions that, when executed by one or more processors, such as the processor 501 in fig. 2, cause the computer to perform the steps of a method for detecting air conditioner faults in any of the above-described method embodiments, or to implement the functions of the modules of a device for detecting air conditioner faults in any of the above-described device embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. An air conditioner fault detection method is characterized by comprising the following steps:
dynamically acquiring the temperature of an outer disc of an air conditioner, the temperature of an outer ring and the frequency of a compressor;
determining the temperature state of the air conditioner according to the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor;
when the temperature state of the air conditioner is an abnormal temperature state, acquiring gear information and working current of the air conditioner;
determining the current state of the air conditioner according to the gear information and the working current;
and when the current state of the air conditioner is an abnormal current state, determining that the air conditioner has a shielding fault.
2. The method as claimed in claim 1, wherein the dynamically obtaining the outer disc temperature, the outer ring temperature and the compressor frequency of the air conditioner comprises:
and acquiring the outer disc temperature, the outer ring temperature and the compressor frequency according to a preset time period, wherein the outer disc temperature and the outer ring temperature acquired at the same time are a group of temperatures.
3. The method of claim 2, wherein the determining the temperature status of the air conditioner according to the outer disc temperature, the outer ring temperature and the compressor frequency comprises:
in a first time interval, determining the temperature state of the air conditioner according to the temperature of the outer disc and the temperature of the outer ring; the first time interval is a time interval from the first moment to the second moment of the air conditioner, and the first moment is the moment when the air conditioner starts to operate;
in a second time interval, determining the temperature state of the air conditioner according to the temperature of the outer disc, the temperature of the outer ring and the frequency of the compressor; the second time period is a time period from the second moment to a third moment of the air conditioner.
4. The air conditioner fault detection method of claim 3, wherein the determining the temperature state of the air conditioner according to the outer disk temperature and the outer ring temperature in the first period of time comprises:
in the first time period, subtracting the outer ring temperature in the same group of temperatures from the outer disc temperature in each group of temperatures to obtain the temperature difference of each group of temperatures;
subtracting the temperature difference of the first half time period from the temperature difference of the second half time period of the first time period to obtain a plurality of groups of temperature change values;
and determining the temperature state of the air conditioner according to the temperature change value.
5. The method as claimed in claim 3, wherein the determining the temperature state of the air conditioner according to the outer disc temperature, the outer ring temperature and the compressor frequency during the second period comprises:
determining the frequency state of the air conditioner according to the compressor frequency in the second time interval;
when the frequency state of the air conditioner is a high-frequency state, subtracting the outer ring temperature in the same group of temperatures from the outer disc temperature in each group of temperatures to obtain the temperature difference of each group of temperatures;
subtracting the temperature difference of the first half time period of the second time period from the temperature difference of the second half time period to obtain a plurality of groups of temperature change values;
and determining the temperature state of the air conditioner according to the temperature change value.
6. The method as claimed in claim 1, wherein the determining the current state of the air conditioner according to the gear information and the operating current comprises:
acquiring a standard working current and a standard current difference of the air conditioner according to the gear information;
subtracting the standard working current from the working current to obtain a current difference;
and determining the current state of the air conditioner according to the current difference and the standard current difference.
7. The air conditioner fault detection method according to any one of claims 1 to 6, wherein after it is determined that there is a blocking fault in the air conditioner, the air conditioner fault detection method further comprises:
and sending a fault prompt to a user and controlling the air conditioner to be shut down.
8. An air conditioner fault detection apparatus, comprising:
the first acquisition module is used for acquiring the temperature of an outer disc, the temperature of an outer ring and the frequency of a compressor of the air conditioner;
the first determining module is used for determining the temperature state of the air conditioner according to the outer disc temperature, the outer ring temperature and the compressor frequency;
the second acquisition module is used for acquiring the gear information and the working current of the air conditioner when the temperature state of the air conditioner is an abnormal temperature state;
the second determining module is used for determining the current state of the air conditioner according to the gear information and the working current;
and the third determining module is used for determining that the air conditioner has a shielding fault when the current state of the air conditioner is an abnormal current state.
9. An air conditioner, comprising:
a compressor;
a first temperature sensor for detecting an outer panel temperature of the air conditioner;
the second temperature sensor is used for detecting the temperature of the outer ring of the air conditioner;
a first current sensor for detecting an operating current of the air conditioner;
a controller connected to the compressor, the first temperature sensor, the second temperature sensor, and the first current sensor, respectively, the controller including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the air conditioner fault detection method of any one of claims 1 to 7.
10. A non-transitory computer-readable storage medium storing computer-executable instructions that, when executed by an electronic device, cause the electronic device to perform the air conditioner fault detection method according to any one of claims 1 to 7.
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