CN114459119A - Air conditioner blockage detection method, device, equipment and storage medium - Google Patents

Air conditioner blockage detection method, device, equipment and storage medium Download PDF

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Publication number
CN114459119A
CN114459119A CN202011250437.2A CN202011250437A CN114459119A CN 114459119 A CN114459119 A CN 114459119A CN 202011250437 A CN202011250437 A CN 202011250437A CN 114459119 A CN114459119 A CN 114459119A
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air conditioner
change
absolute value
compressor
value
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CN114459119B (en
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刘华瑞
戚文端
刘燕飞
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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

Abstract

The invention discloses a method, a device, equipment and a storage medium for detecting air conditioner blockage, wherein the method comprises the following steps: acquiring a first operating frequency of a compressor and a first inlet and outlet temperature difference of a throttling device; judging whether the first operating frequency meets a first preset condition and whether the absolute value of the first inlet-outlet temperature difference is smaller than a first threshold value; and if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold value, obtaining a first blockage detection result of the air conditioner. The technical problem that the air conditioner blocking fault detection method in the prior art can increase the damage risk of the compressor is solved, the air conditioner operation parameters are not required to be changed during air conditioner blocking fault detection, and the air conditioner is effectively protected in the detection process.

Description

Air conditioner blockage detection method, device, equipment and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner blockage detection method, device, equipment and storage medium.
Background
The household air conditioner has the problem that a refrigerating system is blocked due to various conditions. For example, during installation or moving, a low-pressure valve of a high-pressure valve may leak to open, so that the system is blocked; the system is blocked due to dirty blockage and ice blockage at the throttling component; the connecting pipes inside and outside the room are seriously folded and flattened to cause the blockage of the system. When the compressor is blocked, the refrigerant does not flow, the heat of the motor of the compressor cannot be taken away in time, the temperature of the motor is higher and higher, and the compressor can be demagnetized and damaged. Therefore, it is necessary to detect and detect the blockage in time to avoid damage to the compressor.
The existing detection method detects the fault by changing the parameter change condition after the frequency of the compressor of the air conditioner. However, the inventors of the present application have found that the above-mentioned techniques have at least the following technical problems: changing the compressor frequency of the air conditioner increases the risk of compressor damage.
Disclosure of Invention
The embodiment of the application provides an air conditioner blockage detection method, an air conditioner blockage detection device, air conditioner blockage detection equipment and a storage medium, solves the technical problem that in the prior art, the air conditioner blockage fault detection method can increase the damage risk of a compressor, achieves the technical effect that the running parameters of an air conditioner do not need to be changed when the air conditioner blockage fault is detected, and effectively protects the air conditioner in the detection process.
The embodiment of the application provides an air conditioner blockage detection method, which comprises the following steps:
acquiring a first operating frequency of a compressor and a first inlet and outlet temperature difference of a throttling device;
judging whether the first operating frequency meets a first preset condition and whether the absolute value of the first inlet-outlet temperature difference is smaller than a first threshold value;
and if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold value, obtaining a first blockage detection result of the air conditioner.
Optionally, after obtaining the first blockage detection result of the air conditioner, the method further includes:
acquiring a second operating frequency of the compressor, a second front-rear temperature difference of the throttling device and a parameter change value of the air conditioner based on the first blockage detection result; the second front-rear temperature difference is the temperature difference between the front and the rear of the throttling device obtained after the air conditioner adjusts the operation state according to a preset adjustment rule, the second operation frequency of the compressor is the operation frequency of the compressor obtained after the air conditioner adjusts the operation state according to the preset adjustment rule, and the parameter change value is the air conditioner operation parameter change value before and after the air conditioner adjusts the operation state according to the preset adjustment rule;
and obtaining a second blockage detection result of the air conditioner based on a second operating frequency of the compressor, the second front-rear temperature difference and the parameter change value.
Optionally, the obtaining a second blockage detection result of the air conditioner based on the second operating frequency of the compressor, the second front-rear temperature difference, and the parameter variation value specifically includes:
judging whether the second operating frequency meets a second preset condition, judging whether the absolute value of the second front-back temperature difference is smaller than a second threshold value, and judging whether the parameter change value meets a third preset condition:
and if the second operating frequency meets a second preset condition, the absolute value of the temperature difference before and after the second is smaller than a second threshold value, and the parameter change value meets a third preset condition, obtaining a second blockage detection result.
Optionally, the air conditioner is in a cooling mode; the preset adjustment rule is that the rotating speed of an indoor unit fan of the air conditioner is reduced or the opening of the electronic expansion valve is reduced; the parameter variation values include: the air conditioner adjusts the running state according to the preset adjustment rule to obtain a compressor running current change absolute value, a compressor running power change absolute value, a compressor exhaust port temperature change absolute value, a condenser outlet temperature change absolute value and a condenser middle temperature change absolute value;
the parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a third threshold value;
the absolute value of the change of the running power of the compressor is smaller than a fourth threshold value;
the absolute value of the temperature change of the exhaust port of the compressor is smaller than a fifth threshold value;
the absolute value of the change of the temperature at the outlet of the condenser is smaller than a sixth threshold value;
and the absolute value of the temperature change of the middle part of the condenser is smaller than a sixth threshold value.
Optionally, if the preset adjustment rule is to reduce the opening degree of the electronic expansion valve; the parameter variation value further includes: the air conditioner adjusts the running state according to the preset adjustment rule to obtain an absolute value of the downstream temperature change of the throttling device;
the parameter variation value satisfies a third preset condition, which specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a third threshold value;
the absolute value of the change of the running power of the compressor is smaller than a fourth threshold value;
the absolute value of the temperature change of the exhaust port of the compressor is smaller than a fifth threshold value;
the absolute value of the change of the temperature at the outlet of the condenser is smaller than a sixth threshold value;
the absolute value of the temperature change of the middle part of the condenser is smaller than a sixth threshold value;
and the absolute value of the temperature change of the downstream of the throttling device is smaller than a sixth threshold value.
Optionally, the air conditioner is in a heating mode; the preset adjustment rule is that the rotating speed of an indoor unit fan of the air conditioner is reduced or the opening of the electronic expansion valve is reduced; the parameter variation values include: the air conditioner adjusts the absolute value of the change of the running current of the compressor, the absolute value of the change of the running power of the compressor, the absolute value of the change of the temperature of the exhaust port of the compressor, the absolute value of the change of the temperature of an evaporator coil and the absolute value of the change of the downstream temperature of the throttling device, which are obtained after the running state is adjusted according to the preset adjustment rule;
the parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a seventh threshold value;
the absolute value of the change of the running power of the compressor is smaller than an eighth threshold value;
the absolute value of the temperature change of the air outlet of the compressor is smaller than a ninth threshold value;
the absolute value of the change in temperature of the evaporator coil is less than a tenth threshold;
the absolute value of the temperature change downstream of the throttling device is smaller than a tenth threshold value.
Optionally, if the preset adjustment rule is to reduce the opening degree of the electronic expansion valve; the parameter variation value further includes: the air conditioner adjusts the absolute value of the change of the outlet temperature of the condenser obtained after the running state is adjusted according to the preset adjustment rule;
the parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a seventh threshold value;
the absolute value of the change of the running power of the compressor is smaller than an eighth threshold value;
the absolute value of the temperature change of the air outlet of the compressor is smaller than a ninth threshold value;
the absolute value of the change in the condenser outlet temperature is less than a tenth threshold;
the absolute value of the change in temperature of the evaporator coil is less than a tenth threshold;
the absolute value of the temperature change downstream of the throttling device is smaller than a tenth threshold value.
Optionally, the obtaining, based on the first blockage detection result, a second operating frequency of the compressor, a second front-rear temperature difference of the throttling device, and a parameter change value of the air conditioner specifically includes:
adjusting the running state of the air conditioner according to a preset adjustment rule based on the first blockage detection result so that the air conditioner runs according to the adjusted running state;
and acquiring a second operating frequency of the compressor, a second front-rear temperature difference of the throttling device and a parameter change value of the air conditioner.
Optionally, the first preset condition includes:
and whether the first operating frequency is greater than a frequency threshold value or not and whether the time for which the compressor continuously operates according to the first operating frequency is greater than a first preset time or not.
Optionally, the second preset condition includes:
and whether the second operation frequency is greater than a frequency threshold value or not and whether the time for which the compressor continuously operates according to the second operation frequency is greater than a second preset time or not.
Further, to achieve the above object, another embodiment of the present application provides, based on the same inventive principles, an air conditioner clogging detection apparatus including:
the parameter acquisition module is used for acquiring a first operating frequency of the compressor and a first inlet and outlet temperature difference of the throttling device;
the condition judgment module is used for judging whether the first operating frequency meets a first preset condition and whether the absolute value of the first inlet and outlet temperature difference is smaller than a first threshold value;
and the blockage detection module is used for obtaining a first blockage detection result of the air conditioner if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold value.
Further, to achieve the above object, the present application also provides a computer-readable storage medium having stored thereon an air conditioner clogging detection program which, when executed by a processor, implements the aforementioned method.
In addition, to achieve the above object, the present application further provides an apparatus including a memory, a processor, and an air conditioner blockage detection program stored on the memory and operable on the processor, wherein the processor implements the foregoing method when executing the air conditioner blockage detection program.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the application provides an air conditioner blockage detection method, an air conditioner blockage detection device, equipment and a storage medium, wherein the air conditioner blockage detection method comprises the steps of firstly obtaining a first running frequency of a compressor and a first inlet-outlet temperature difference of a throttling device; then, judging whether the first operating frequency meets a first preset condition and whether the absolute value of the first inlet-outlet temperature difference is smaller than a first threshold value; and if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold value, obtaining a first blockage detection result of the air conditioner. Therefore, on the basis of the running frequency of the compressor, the blockage detection result is directly obtained by utilizing the magnitude relation between the temperature difference of the first inlet and the outlet of the throttling device and the first threshold, and fault detection is not needed to be carried out by changing the parameter change condition after the frequency of the compressor of the air conditioner in the prior art, so that the technical problem that the damage risk of the compressor can be increased by the air conditioner blockage fault detection method in the prior art is effectively solved, the running parameter of the air conditioner is not needed to be changed during air conditioner blockage fault detection, and the technical effect of effectively protecting the air conditioner in the detection process is achieved.
Drawings
FIG. 1 is a diagram of an air conditioning refrigeration system according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating an embodiment of a method for detecting air conditioner clogging according to the present invention;
FIG. 3 is a schematic flow chart illustrating an air conditioner jam detecting method according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of an air conditioner blockage detection device according to the present invention.
Detailed Description
The application provides an air conditioner blockage detection method, on the basis of the running frequency of a compressor, the blockage detection result is directly obtained by utilizing the magnitude relation between the temperature difference of a first inlet and a first outlet of a throttling device and a first threshold value, and fault detection is not needed to be carried out by changing the parameter change condition of the air conditioner after the frequency of the compressor like the prior art, so that the technical problem that the damage risk of the compressor can be increased by the air conditioner blockage fault detection method in the prior art can be effectively solved, further, the running parameter of the air conditioner does not need to be changed when the air conditioner blockage fault is detected, and the technical effect of effective protection is realized on the air conditioner in the detection process.
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example one
The embodiment provides an air conditioner blockage detection method which is used for detecting blockage faults of an air conditioner refrigeration system.
It will be appreciated that air conditioning refrigeration systems typically include at least a compressor, an evaporator, a condenser and a throttling device, wherein the evaporator is located in the indoor unit and the compressor and condenser are located in the outdoor unit. Referring to fig. 1, in the present embodiment, the compressor is connected to the evaporator, the throttling device and the condenser in sequence through the four-way valve. It should be noted that the principle of implementing cooling and heating by an air-conditioning refrigeration system belongs to the common general knowledge in the art, and is not described herein again.
Referring to fig. 2, the method for detecting air conditioner blockage according to the embodiment includes:
s10, acquiring a first operating frequency of the compressor and a first inlet-outlet temperature difference of the throttling device;
s20, judging whether the first running frequency meets a first preset condition and whether the absolute value of the first inlet and outlet temperature difference is smaller than a first threshold value;
s30, if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold value, obtaining a first blockage detection result of the air conditioner.
It should be noted that, in this embodiment, the parameters such as the operating frequency and the temperature difference can be obtained by monitoring by arranging a sensor or a monitoring instrument at a corresponding position. Referring to fig. 1, an evaporator temperature sensor and an indoor ambient temperature sensor are installed at an evaporator, a temperature sensor after a throttle member is installed behind a throttle device, an outdoor ambient temperature sensor, a condenser middle temperature sensor and a condenser outlet temperature sensor are installed at a condenser, and an exhaust temperature sensor is installed at a compressor. For example, the first inlet-outlet temperature difference of the throttling device may be monitored by a temperature sensor arranged at the outlet of the condenser to obtain a condenser outlet temperature T3Temperature T downstream of the throttle device, monitored by a temperature sensor arranged after the throttle device6To obtain a first inlet-outlet temperature difference T3-T6。
The execution of the steps is described in detail below with reference to fig. 2.
First, S10 is executed to obtain a first operating frequency of the compressor and a first inlet-outlet temperature difference of the throttling device.
In a specific implementation process, the first operation frequency and the first inlet/outlet temperature difference are collected in a normal operation process of the air conditioner. The normal operation process of the air conditioner comprises normal compressor starting and normal refrigeration or heating parameter operation.
In particular, T3And T6May be the average of the condenser outlet temperature and the temperature downstream of the restriction during a predetermined period of time taken.
Next, S20 is executed to determine whether the first operating frequency satisfies a first preset condition and whether the absolute value of the first inlet/outlet temperature difference is smaller than a first threshold.
In a specific implementation, when a blockage occurs in a refrigeration system, the operating frequency of a compressor is increased, but the operating frequency of differently configured air conditioners is different. Therefore, the first preset condition may be set according to the operation state of the air conditioner, and as an alternative embodiment, the first preset condition includes: and whether the first operating frequency is greater than a frequency threshold value or not and whether the time for which the compressor continuously operates according to the first operating frequency is greater than a first preset time or not.
Specifically, the frequency threshold and the first preset time both need to be set according to the actual operation state of the air conditioner, for example, the frequency threshold may be 30Hz, and the first preset time may be 3-5 min.
However, the air conditioner may also cause a change in the first operating frequency due to another fault or adjustment of a parameter, and thus, a jam detection result may not be obtained only by the first operating frequency and the first preset condition. Therefore, in this embodiment, it is also determined whether the absolute value of the first inlet/outlet temperature difference is smaller than the first threshold. In the specific implementation process, if the refrigeration system is in a blocked state, the refrigerant in the refrigeration system does not flow or the flow speed is extremely low, at the moment, the throttling component has no throttling effect, and the front-rear temperature difference is very small, so that the judgment can be quickly carried out through the relation between the absolute value of the first inlet-outlet temperature difference and the first threshold value. For example, | T3-T6| <2, it can be determined that the throttling element is clogged. It should be noted that, ideally, the first threshold should be 0, that is, the front-back temperature difference of the throttling element is equal. However, in the actual operation process, because the temperature measurement positions of the temperature sensors are different, temperature errors exist, and therefore, generally, | T3-T6| <2, whether the throttling device is blocked or not can be judged. And then, whether the refrigeration system is blocked or not can be judged by combining the satisfying relation between the first operating frequency and the first preset condition.
Next, S30 is executed, and if the first operating frequency satisfies the first preset condition and the absolute value of the first inlet/outlet temperature difference is smaller than the first threshold, a first blockage detection result of the air conditioner is obtained.
In a specific process, if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold, it is indicated that the refrigeration system is blocked. Therefore, the first blockage detection result in this embodiment is the preliminary judgment of the refrigeration system for blockage.
Note that the blockage in this embodiment may be caused by the high-low pressure valve not being opened, or may be caused by the refrigerant not flowing.
Therefore, in the above embodiment, on the basis of the operation frequency of the compressor, the blockage detection result is directly obtained by using the magnitude relation between the temperature difference of the first inlet and the outlet of the throttling device and the first threshold, and the fault detection is not required to be performed by changing the parameter change condition after the frequency of the compressor of the air conditioner as in the prior art, so that the technical problem that the damage risk of the compressor is increased by the air conditioner blockage fault detection method in the prior art is effectively solved, and further, the operation parameter of the air conditioner is not required to be changed during the air conditioner blockage fault detection, and the technical effect of effectively protecting the air conditioner in the detection process is realized.
In addition to the foregoing embodiments, in order to further confirm the clogging detection result, the accuracy of the detection result is improved. As an alternative embodiment, referring to fig. 3, after the obtaining of the first blockage detection result of the air conditioner, the method further includes:
s40, acquiring a second running frequency of the compressor, a second front-rear temperature difference of the throttling device and a parameter change value of the air conditioner based on the first blockage detection result;
s50, obtaining a second blockage detection result of the air conditioner based on a second operation frequency of the compressor, the second front-rear temperature difference and the parameter change value.
It should be noted that the first blockage detection result obtained in the foregoing embodiment is only to preliminarily determine that the refrigeration system is blocked, on one hand, since the throttling device is used for reducing temperature and pressure, when the compressor has a low operation frequency, the outdoor temperature is low, the indoor temperature is high, the condenser pressure is low, the evaporator pressure is high, and the throttling device has a small temperature difference and pressure drop, an erroneous determination may be generated at this time; on the other hand, since erroneous determination may occur due to the accuracy of detection and an error in acquisition, a clogging failure cannot be completely determined. Therefore, it is necessary to change the operation state of the air conditioner to further obtain a second blockage detection result through the change of the parameter value to determine whether the blockage of the refrigeration system occurs. Wherein the second occlusion detection result is a confirmation result.
Therefore, in the present embodiment, in order to obtain a more accurate detection result, after obtaining the first clogging detection result, it is necessary to first perform S40, and based on the first clogging detection result, obtain the second operation frequency of the compressor, the second pre-post temperature difference of the throttle device, and the parameter variation value of the air conditioner.
In a specific implementation process, the second front-back temperature difference is the temperature difference between the front and the back of the throttling device obtained after the air conditioner adjusts the operation state according to a preset adjustment rule, the second operation frequency of the compressor is the operation frequency of the compressor obtained after the air conditioner adjusts the operation state according to the preset adjustment rule, and the parameter change value is the air conditioner operation parameter change value before and after the air conditioner adjusts the operation state according to the preset adjustment rule.
That is, the second operating frequency of the compressor, the second pre-post temperature difference of the throttling device, and the parameter variation value of the air conditioner are data obtained after the operating state of the air conditioner is adjusted. Therefore, as an optional implementation manner, the obtaining, based on the first blockage detection result, a second operating frequency of the compressor, a second front-rear temperature difference of the throttling device, and a parameter change value of the air conditioner specifically includes:
s401, based on the first blockage detection result, adjusting the running state of the air conditioner according to a preset adjustment rule so that the air conditioner runs according to the adjusted running state;
s402, acquiring a second running frequency of the compressor, a second front-rear temperature difference of the throttling device and a parameter change value of the air conditioner.
That is, in a specific implementation process, after obtaining the first blockage detection result, the operation state of the air conditioner needs to be first adjusted according to a preset adjustment rule, so that the air conditioner operates according to the adjusted operation state. The preset adjustment rule may be to change the rotation speed of the fan or to change the opening of the electronic expansion valve. Specifically, after the operation state is adjusted according to a preset adjustment rule, the operation time of the air conditioner is a period of time T, and the average value of the condenser outlet temperature T3a and the throttling device rear temperature T6a in the last 1 minute or two minutes is acquired to obtain a second front-rear temperature difference. The parameter change value is a change value of the acquired parameter value and the parameter value before the change of the operation state after the operation time t of the air conditioner.
Next, S50 is executed, and a second blockage detection result of the air conditioner is obtained based on a second operation frequency of the compressor, the second front-rear temperature difference, and the parameter variation value.
In a specific implementation process, to obtain a more accurate second blockage detection result, the second operation frequency of the compressor, the second front-rear temperature difference and the parameter change value are used for judgment.
As an optional implementation manner, the obtaining a second blockage detection result of the air conditioner based on the second operating frequency of the compressor, the second front-rear temperature difference, and the parameter variation value specifically includes:
s501, judging whether the second running frequency meets a second preset condition, judging whether the absolute value of the second front-back temperature difference is smaller than a second threshold value, and judging whether the parameter change value meets a third preset condition:
s502, if the second operating frequency meets a second preset condition, the absolute value of the second temperature difference before and after the second temperature difference is smaller than a second threshold value, and the parameter change value meets a third preset condition, obtaining a second blockage detection result.
As an optional implementation manner, the second preset condition is similar to the first preset condition, and includes:
and whether the second operation frequency is greater than a frequency threshold value or not and whether the time for which the compressor continuously operates according to the second operation frequency is greater than a second preset time or not.
Therefore, in a specific implementation process, the execution process of determining whether the second operating frequency meets the second preset condition and determining whether the absolute value of the second front-rear temperature difference is smaller than the second threshold value may refer to the implementation manner of determining whether the first operating frequency meets the first preset condition and whether the absolute value of the first inlet-outlet temperature difference is smaller than the first threshold value, and details are not repeated here.
In this embodiment, whether the parameter variation value satisfies the third preset condition may be divided into a plurality of cases, and specific embodiments of some cases will be described in detail below.
Since the throttling device may or may not include an electronic expansion valve. In the case of an electronic expansion valve, the preset adjustment rule of this embodiment may be to change the opening degree of the electronic expansion valve or change the rotation speed of the fan; in the case of no electronic expansion valve, the preset regulation rule of the embodiment is to change the rotation speed of the fan.
In addition, the refrigerating system can operate in a refrigerating mode and also can operate in a heating mode, and the modes of changing the rotating speed of the fan are different in different working modes. Wherein, in the refrigeration mode, the rotating speed of the outdoor fan is reduced; and in the heating mode, the rotating speed of the indoor fan is reduced.
In addition, the parameter variation value is different from the third preset condition under different preset adjustment rules and different working modes, and the following will describe in detail with respect to several specific applications.
In a first case, the air conditioner is in a cooling mode; the parameter variation values include: and the air conditioner adjusts the running state according to the preset adjustment rule to obtain a compressor running current change absolute value, a compressor running power change absolute value, a compressor exhaust port temperature change absolute value, a condenser outlet temperature change absolute value and a condenser middle temperature change absolute value.
The temperature of the exhaust port of the compressor can be monitored and obtained through an exhaust temperature sensor, and the temperature of the middle part of the condenser can be monitored and obtained through a temperature sensor in the middle part of the condenser.
In this case, the preset adjustment rule is to reduce the rotation speed of the outdoor fan. The throttling device may or may not include an electronic expansion valve.
The parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a third threshold value;
the absolute value of the change of the running power of the compressor is smaller than a fourth threshold value;
the absolute value of the temperature change of the exhaust port of the compressor is smaller than a fifth threshold value;
the absolute value of the change of the temperature at the outlet of the condenser is smaller than a sixth threshold value;
and the absolute value of the temperature change of the middle part of the condenser is smaller than a sixth threshold value.
It should be noted that the third threshold, the fourth threshold, the fifth threshold, and the sixth threshold may be set according to the working condition and the operating parameter of the air conditioner, for example, the third threshold may be 1A, the fourth threshold may be 0.2Kw, the fifth threshold may be 8 ℃ and the sixth threshold may be 2 ℃. Because the air conditioner is in a blocking state, the refrigerant does not flow, and the condenser and the evaporator do not exchange heat, the temperature, the exhaust gas, the power and the current of the condenser and the evaporator cannot be changed along with the change of the rotating speed of the fan. According to the principle, the fault can be confirmed by one or more parameters of the absolute value of the change of the compressor running current, the absolute value of the change of the compressor running power, the absolute value of the change of the temperature of the exhaust port of the compressor, the absolute value of the change of the temperature of the outlet of the condenser and the absolute value of the change of the temperature of the middle part of the condenser in the embodiment.
In the second case, if the throttling device includes an electronic expansion valve, the preset adjustment rule may be to reduce the opening degree of the electronic expansion valve in addition to the rotating speed of the outdoor fan; when the preset adjustment rule is to reduce the opening degree of the electronic expansion valve, the parameter change value further includes: the air conditioner adjusts the running state according to the preset adjustment rule to obtain the absolute value of the downstream temperature change of the throttling device;
the parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a third threshold value;
the absolute value of the change of the running power of the compressor is smaller than a fourth threshold value;
the absolute value of the temperature change of the exhaust port of the compressor is smaller than a fifth threshold value;
the absolute value of the change of the temperature at the outlet of the condenser is smaller than a sixth threshold value;
the absolute value of the temperature change of the middle part of the condenser is smaller than a sixth threshold value;
and the absolute value of the temperature change of the downstream of the throttling device is smaller than a sixth threshold value.
Similarly, because the electronic expansion valve is in a blocking state, the refrigerant does not flow, and the condenser and the evaporator do not exchange heat, the temperature, the exhaust gas, the power and the current of the condenser and the evaporator cannot be changed along with the change of the opening degree of the electronic expansion valve. According to the principle, the fault can be confirmed by one or more parameters of the absolute value of the change of the compressor running current, the absolute value of the change of the compressor running power, the absolute value of the change of the temperature of the exhaust port of the compressor, the absolute value of the change of the temperature of the outlet of the condenser and the absolute value of the change of the temperature of the middle part of the condenser in the embodiment.
As can be seen, in this case, the clogging state can also be determined from the magnitude relationship between the absolute value of the temperature change downstream of the throttle device and the sixth threshold value, compared to the first case. Therefore, the jam judgment can be performed simultaneously or partially selectively by more judgment conditions, so that the detection result is more accurate, and the detection operability is stronger.
In a third situation, the air conditioner is in a heating mode; the parameter variation values include: the air conditioner adjusts the absolute value of the change of the running current of the compressor, the absolute value of the change of the running power of the compressor, the absolute value of the change of the temperature of the exhaust port of the compressor, the absolute value of the change of the temperature of an evaporator coil and the absolute value of the change of the downstream temperature of the throttling device, which are obtained after the running state is adjusted according to the preset adjustment rule;
under this condition, the preset adjustment rule is to reduce the indoor fan rotational speed. The throttling device may or may not include an electronic expansion valve.
The parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a seventh threshold value;
the absolute value of the change of the running power of the compressor is smaller than an eighth threshold value;
the absolute value of the temperature change of the air outlet of the compressor is smaller than a ninth threshold value;
the absolute value of the change in temperature of the evaporator coil is less than a tenth threshold;
the absolute value of the temperature change downstream of the throttling device is smaller than a tenth threshold value.
It should be noted that the seventh threshold, the eighth threshold, the ninth threshold, and the tenth threshold may be set according to the working condition and the operating parameter of the air conditioner, for example, the seventh threshold may be 1A, the eighth threshold may be 0.2Kw, the ninth threshold may be 8 ℃ and the tenth threshold may be 2 ℃. Because the air conditioner is in a blocking state, the refrigerant does not flow, and the condenser and the evaporator do not exchange heat, the temperature, the exhaust gas, the power and the current of the condenser and the evaporator cannot be changed along with the change of the rotating speed of the fan. According to the principle, the fault can be confirmed by one or more parameters of the absolute value of the change of the compressor running current, the absolute value of the change of the compressor running power, the absolute value of the change of the temperature of the exhaust port of the compressor, the absolute value of the change of the temperature of the outlet of the condenser and the absolute value of the change of the temperature of the middle part of the condenser in the embodiment.
In a fourth situation, the throttling device comprises an electronic expansion valve, and the preset adjustment rule can reduce the rotating speed of the indoor fan and can also reduce the opening degree of the electronic expansion valve; when the preset adjustment rule is that the opening degree of the electronic expansion valve is reduced, the parameter change value further comprises: the air conditioner adjusts the absolute value of the change of the outlet temperature of the condenser obtained after the running state is adjusted according to the preset adjustment rule;
the parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a seventh threshold value;
the absolute value of the change of the running power of the compressor is smaller than an eighth threshold value;
the absolute value of the temperature change of the air outlet of the compressor is smaller than a ninth threshold value;
the absolute value of the change of the condenser outlet temperature is smaller than a tenth threshold value;
the absolute value of the change in temperature of the evaporator coil is less than a tenth threshold;
the absolute value of the temperature change downstream of the throttling device is smaller than a tenth threshold value.
Similarly, because the refrigerant is in a blocking state, the refrigerant does not flow, and the condenser and the evaporator do not exchange heat, the temperature, the exhaust gas, the power and the current of the condenser and the evaporator cannot be changed along with the change of the opening degree of the electronic expansion valve. According to the principle, the fault can be confirmed by one or more parameters of the absolute value of the change of the compressor running current, the absolute value of the change of the compressor running power, the absolute value of the change of the temperature of the exhaust port of the compressor, the absolute value of the change of the temperature of the outlet of the condenser and the absolute value of the change of the temperature of the middle part of the condenser in the embodiment.
For example, T1Indicating the indoor ambient temperature, T2Indicating indoor evaporator coil temperature, T3Denotes the condenser outlet temperature, T4Indicating the outdoor ambient temperature, T5Denotes the condenser mid-temperature, T6Indicating the temperature, T, downstream of the restriction devicePIndicating compressor discharge temperature, I indicating compressor operating current, and P indicating compressor operating power. Therefore, adjusting the parameter value before the operation state according to the preset adjustment rule includes: t is2 front、T3 front、T5 front、T6 front、TP front、IFront side、PFront side(ii) a Adjusting the parameters after the operation state according to the preset adjustment ruleThe values include: t is2 after、T3 after、TAfter 5、T6 back、TP is back、IRear end、PRear end(ii) a The compressor operation current is changed by the absolute value of | IFront part-IRear endAbsolute value of variation of compressor operation power is | PFront side-PRear endAbsolute value of temperature variation at the exhaust port of the compressor is | T |P front-TP is backAbsolute value of temperature change of evaporator coil is | T2 front-T2 afterAbsolute value of temperature change of downstream of I and throttling gear is T6 front-T6 backAbsolute value of change of condenser outlet temperature is | T |3 front-T3 afterAbsolute value of temperature in the middle of condenser is | T |5 front-TAfter 5|。
As can be seen, in this case, the clogging state can also be determined based on the magnitude relationship between the absolute value of the change in the condenser outlet temperature and the tenth threshold value, as compared with the third case. Therefore, the jam judgment can be carried out simultaneously or partially selectively by more judgment conditions, so that the detection result is more accurate and the detection operability is stronger.
Therefore, the technical solution in the embodiment of the present application at least has the following technical effects or advantages:
firstly, under the condition that the normal operation state of the air conditioner is not changed, a first blockage detection result is directly obtained by utilizing the magnitude relation between the temperature difference of a first inlet and a first outlet of a throttling device and a first threshold value on the basis of the operation frequency of a compressor and is used as a primary blockage judgment result, and primary screening of the air conditioner with the blockage fault is realized. And then, after the rotating speed of the fan and/or the opening of the electronic expansion valve of the air conditioner which is preliminarily screened as blocked is changed, the blockage of the refrigeration system is quickly and accurately judged according to the change condition of the parameters. The fault detection is not required to be directly carried out by changing the parameter change condition after the frequency of the compressor of the air conditioner like the prior art, on one hand, the judgment result of the primary blockage can realize primary screening, the effectiveness of fault identification is improved, the probability of directly carrying out fault judgment on the fault-free air conditioner in a mode of changing the running state is reduced, and the efficiency of fault detection is improved; on the other hand, when the air conditioner is accurately judged, the damage of the compressor frequency to the air conditioner is avoided by changing the rotating speed of the fan and/or the opening degree of the electronic expansion valve instead of changing the compressor frequency in the prior art, so that the technical problem that the air conditioner blocking fault detection method in the prior art can increase the damage risk of the compressor is effectively solved, the air conditioner detection efficiency is improved, the detection precision is guaranteed, and the technical effect of avoiding unnecessary damage to the air conditioner is further achieved. Finally, when the running state of the air conditioner is changed, the fault is confirmed by changing the rotating speed of the fan or the opening degree of the electronic expansion valve instead of the method of increasing the running frequency of the compressor. Thus, the method of this implementation also avoids increasing the risk of damage to the compressor.
Based on the same inventive concept, the embodiment of the application also provides an air conditioner blockage detection device corresponding to the method in the first embodiment, which is shown in the second embodiment.
Example two
The embodiment provides an air conditioner blocks up detection device, air conditioner blocks up detection device includes:
the parameter acquisition module is used for acquiring a first operating frequency of the compressor and a first inlet and outlet temperature difference of the throttling device;
the condition judgment module is used for judging whether the first operating frequency meets a first preset condition and whether the absolute value of the first inlet and outlet temperature difference is smaller than a first threshold value;
and the blockage detection module is used for obtaining a first blockage detection result of the air conditioner if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold value.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the air conditioner blockage detection device of the embodiment firstly obtains a first operating frequency of the compressor and a first inlet-outlet temperature difference of the throttling device through a parameter obtaining module; then, judging whether the first operating frequency meets a first preset condition and whether the absolute value of the first inlet-outlet temperature difference is smaller than a first threshold value through a condition judgment module; and if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold value, obtaining a first blockage detection result of the air conditioner through a blockage detection module. Therefore, on the basis of the running frequency of the compressor, the blockage detection result is directly obtained by utilizing the magnitude relation between the temperature difference of the first inlet and the outlet of the throttling device and the first threshold, and fault detection is not needed to be carried out by changing the parameter change condition after the frequency of the compressor of the air conditioner in the prior art, so that the technical problem that the damage risk of the compressor can be increased by the air conditioner blockage fault detection method in the prior art is effectively solved, the running parameter of the air conditioner is not needed to be changed during air conditioner blockage fault detection, and the technical effect of effectively protecting the air conditioner in the detection process is achieved.
Since the apparatus described in the second embodiment of the present invention is an apparatus used for implementing the method of the first embodiment of the present invention, based on the method described in the first embodiment of the present invention, a person skilled in the art can understand the specific structure and the deformation of the apparatus, and thus the details are not described herein. All the devices adopted in the method of the first embodiment of the present invention belong to the protection scope of the present invention.
Further, based on the same inventive concept, embodiments of the present application also provide a computer-readable storage medium having stored thereon an air conditioner jam detection program that, when executed by a processor, implements the aforementioned method.
Further, based on the same inventive concept, embodiments of the present application also provide an apparatus comprising a memory, a processor, and an air conditioner blockage detection program stored on the memory and executable on the processor, wherein the processor implements the aforementioned method when executing the air conditioner blockage detection program.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (13)

1. An air conditioner blockage detection method is characterized by comprising the following steps:
acquiring a first operating frequency of a compressor and a first inlet and outlet temperature difference of a throttling device;
judging whether the first operating frequency meets a first preset condition and whether the absolute value of the first inlet-outlet temperature difference is smaller than a first threshold value;
and if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold value, obtaining a first blockage detection result of the air conditioner.
2. The method of claim 1, wherein after obtaining the first blockage detection result of the air conditioner, the method further comprises:
acquiring a second operating frequency of the compressor, a second front-rear temperature difference of the throttling device and a parameter change value of the air conditioner based on the first blockage detection result; the second front-rear temperature difference is the temperature difference between the front and the rear of the throttling device obtained after the air conditioner adjusts the operation state according to a preset adjustment rule, the second operation frequency of the compressor is the operation frequency of the compressor obtained after the air conditioner adjusts the operation state according to the preset adjustment rule, and the parameter change value is the air conditioner operation parameter change value before and after the air conditioner adjusts the operation state according to the preset adjustment rule;
and obtaining a second blockage detection result of the air conditioner based on a second operating frequency of the compressor, the second front-rear temperature difference and the parameter change value.
3. The method according to claim 2, wherein the obtaining a second blockage detection result of the air conditioner based on a second operating frequency of the compressor, the second front-rear temperature difference and the parameter variation value specifically comprises:
judging whether the second operating frequency meets a second preset condition, judging whether the absolute value of the second front-back temperature difference is smaller than a second threshold value, and judging whether the parameter change value meets a third preset condition:
and if the second operating frequency meets a second preset condition, the absolute value of the temperature difference before and after the second is smaller than a second threshold value, and the parameter change value meets a third preset condition, obtaining a second blockage detection result.
4. The method of claim 3, wherein the air conditioner is in a cooling mode; the preset adjustment rule is that the rotating speed of an indoor unit fan of the air conditioner is reduced or the opening of the electronic expansion valve is reduced; the parameter variation values include: the air conditioner adjusts the running state according to the preset adjustment rule to obtain a compressor running current change absolute value, a compressor running power change absolute value, a compressor exhaust port temperature change absolute value, a condenser outlet temperature change absolute value and a condenser middle temperature change absolute value;
the parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a third threshold value;
the absolute value of the change of the running power of the compressor is smaller than a fourth threshold value;
the absolute value of the temperature change of the exhaust port of the compressor is smaller than a fifth threshold value;
the absolute value of the change of the temperature at the outlet of the condenser is smaller than a sixth threshold value;
and the absolute value of the temperature change of the middle part of the condenser is smaller than a sixth threshold value.
5. The method of claim 4, wherein if the predetermined adjustment rule is to decrease the opening degree of the electronic expansion valve; the parameter variation value further includes: the air conditioner adjusts the running state according to the preset adjustment rule to obtain an absolute value of the downstream temperature change of the throttling device;
the parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a third threshold value;
the absolute value of the change of the running power of the compressor is smaller than a fourth threshold value;
the absolute value of the temperature change of the exhaust port of the compressor is smaller than a fifth threshold value;
the absolute value of the change of the temperature at the outlet of the condenser is smaller than a sixth threshold value;
the absolute value of the temperature change of the middle part of the condenser is smaller than a sixth threshold value;
and the absolute value of the temperature change of the downstream of the throttling device is smaller than a sixth threshold value.
6. The method of claim 3, wherein the air conditioner is in a heating mode; the preset adjustment rule is that the rotating speed of an indoor unit fan of the air conditioner is reduced or the opening of the electronic expansion valve is reduced; the parameter variation values include: the air conditioner adjusts the absolute value of the change of the running current of the compressor, the absolute value of the change of the running power of the compressor, the absolute value of the change of the temperature of the exhaust port of the compressor, the absolute value of the change of the temperature of an evaporator coil and the absolute value of the change of the downstream temperature of the throttling device, which are obtained after the running state is adjusted according to the preset adjustment rule;
the parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a seventh threshold value;
the absolute value of the change of the running power of the compressor is smaller than an eighth threshold value;
the absolute value of the temperature change of the air outlet of the compressor is smaller than a ninth threshold value;
the absolute value of the change in temperature of the evaporator coil is less than a tenth threshold;
the absolute value of the temperature change downstream of the throttling device is smaller than a tenth threshold value.
7. The method of claim 6, wherein if the predetermined adjustment rule is to decrease the opening degree of the electronic expansion valve; the parameter variation value further includes: the air conditioner adjusts the absolute value of the change of the outlet temperature of the condenser obtained after the running state is adjusted according to the preset adjustment rule;
the parameter variation value satisfies a third preset condition, and specifically includes:
at least one of the following conditions is satisfied:
the absolute value of the change of the running current of the compressor is smaller than a seventh threshold value;
the absolute value of the change of the running power of the compressor is smaller than an eighth threshold value;
the absolute value of the temperature change of the air outlet of the compressor is smaller than a ninth threshold value;
the absolute value of the change in the condenser outlet temperature is less than a tenth threshold;
the absolute value of the change in temperature of the evaporator coil is less than a tenth threshold;
the absolute value of the temperature change downstream of the throttling device is smaller than a tenth threshold value.
8. The method according to any one of claims 2 to 7, wherein the obtaining of the second operating frequency of the compressor, the second temperature difference across the throttling device, and the parameter variation value of the air conditioner based on the first clogging detection result specifically comprises:
adjusting the running state of the air conditioner according to a preset adjustment rule based on the first blockage detection result so that the air conditioner runs according to the adjusted running state;
and acquiring a second operating frequency of the compressor, a second front-rear temperature difference of the throttling device and a parameter change value of the air conditioner.
9. The method according to any one of claims 1 to 7, wherein the first preset condition comprises:
and whether the first operating frequency is greater than a frequency threshold value or not and whether the time for which the compressor continuously operates according to the first operating frequency is greater than a first preset time or not.
10. The method of claim 8, wherein the second predetermined condition comprises:
and whether the second operation frequency is greater than a frequency threshold value or not and whether the time for which the compressor continuously operates according to the second operation frequency is greater than a second preset time or not.
11. An air conditioner clogging detection device, characterized in that it comprises:
the parameter acquisition module is used for acquiring a first operating frequency of the compressor and a first inlet and outlet temperature difference of the throttling device;
the condition judgment module is used for judging whether the first operating frequency meets a first preset condition and whether the absolute value of the first inlet and outlet temperature difference is smaller than a first threshold value;
and the blockage detection module is used for obtaining a first blockage detection result of the air conditioner if the first operating frequency meets the first preset condition and the absolute value of the temperature difference of the first inlet and the first outlet is smaller than the first threshold value.
12. A computer-readable storage medium, having stored thereon an air conditioner clogging detection program, characterized in that the air conditioner clogging detection program, when executed by a processor, implements the method of any one of claims 1 to 10.
13. An apparatus comprising a memory, a processor, and an air conditioner blockage detection program stored on the memory and executable on the processor, the processor implementing the method of any of claims 1-10 when executing the air conditioner blockage detection program.
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