CN110173814B - Air conditioner and refrigerant leakage detection method and device of air conditioner - Google Patents

Air conditioner and refrigerant leakage detection method and device of air conditioner Download PDF

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Publication number
CN110173814B
CN110173814B CN201910468911.XA CN201910468911A CN110173814B CN 110173814 B CN110173814 B CN 110173814B CN 201910468911 A CN201910468911 A CN 201910468911A CN 110173814 B CN110173814 B CN 110173814B
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concentration
air conditioner
gas
rotating speed
refrigerant leakage
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CN110173814A (en
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肖其登
李廷勋
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Sun Yat Sen University
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • 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
    • F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/76—Oxygen

Abstract

The application discloses an air conditioner and a refrigerant leakage detection method and device of the air conditioner, wherein the method comprises the following steps: acquiring a first concentration of gas in the air; according to the first concentration of the gas, the refrigerant leakage of the air conditioner is identified. According to the refrigerant leakage detection method of the air conditioner, the use types of the sensors are reduced, the detection cost is reduced, the risk that the refrigerant leakage cannot be effectively detected due to the fact that the refrigerant sensors are used by mistake is avoided, and the method is simple and easy to achieve.

Description

Air conditioner and refrigerant leakage detection method and device of air conditioner
Technical Field
The present disclosure relates to the field of air conditioners, and particularly to an air conditioner and a method and an apparatus for detecting refrigerant leakage of the air conditioner.
Background
The refrigerant plays an important role in energy conservation and emission reduction, but due to the characteristics of the refrigerant, the refrigerant has the danger of flammability and even explosiveness, if the concentration of the refrigerant reaches a certain value, the refrigerant can possibly have accidents of combustion and even explosion when meeting a fire source, and certain risks are brought to the life and property safety of people. Therefore, the occurrence of harm can be reduced by detecting whether the refrigerant leaks.
In the related art, a refrigerant sensor is mainly used for detecting whether a refrigerant leaks.
However, since the types of refrigerants are more, and different types of refrigerant sensors are required to be used for detection for different types of refrigerants, the detection cost is greatly increased, refrigerant leakage cannot be effectively detected when the refrigerant sensors are used mistakenly, and the detection accuracy is reduced.
Disclosure of Invention
The embodiment of the application provides an air conditioner and a refrigerant leakage detection method and device of the air conditioner, solves the technical problem that in the prior art, due to different types of refrigerants, different types of refrigerant sensors are required to be used for detection, so that the detection cost is greatly increased, the use types of the refrigerant sensors are reduced, the detection cost is reduced, meanwhile, the risk that the refrigerant leakage cannot be effectively detected due to the fact that the refrigerant sensors are mistakenly used is avoided, and the air conditioner is simple and easy to realize.
In order to achieve the above object, the present application provides a refrigerant leakage detection method for an air conditioner, comprising the following steps: acquiring a first concentration of gas in the air; and identifying the refrigerant leakage of the air conditioner according to the first concentration of the gas.
In addition, the refrigerant leakage detection method of the air conditioner according to the above embodiment of the present application may further have the following additional technical features:
according to an embodiment of the present application, the identifying of the air conditioner that the refrigerant leaks according to the first concentration of the gas includes: and detecting and identifying that the first concentration of at least one gas is smaller than a first concentration threshold corresponding to the gas, and identifying that the air conditioner has refrigerant leakage.
According to an embodiment of the present application, the identifying of the air conditioner that the refrigerant leaks according to the first concentration of the gas includes: and comparing the first concentration of each gas with the respective first concentration threshold, detecting and identifying that the first concentration of each gas is smaller than the respective first concentration threshold, and identifying that the air conditioner has refrigerant leakage.
According to an embodiment of the present application, the identifying of the air conditioner that the refrigerant leaks according to the first concentration of the gas includes: and acquiring the total concentration of the first concentration of each gas, comparing the total concentration with a second concentration threshold, detecting and identifying that the total concentration is less than the second concentration threshold, and identifying that the refrigerant leakage of the air conditioner occurs.
According to an embodiment of the present application, after the identifying that the air conditioner has the refrigerant leakage, the method further includes: controlling to open an air door in the air conditioner; and controlling to increase the current rotating speed of an indoor fan in the air conditioner.
According to an embodiment of the application, after the controlling the rotation speed of the indoor fan in the air conditioner is increased, the method further includes: reacquiring a second concentration of the gas at a predetermined interval; detecting and recognizing that the second concentration of at least one gas is still smaller than a corresponding preset concentration threshold value, controlling to continuously increase the rotating speed of the indoor fan, and returning to execute the interval preset time to obtain the second concentration of the gas again; and detecting and identifying that the second concentration of each gas is greater than or equal to the corresponding preset concentration threshold value, controlling to close an air door in the air conditioner, and recovering the rotating speed of the indoor fan to be the current rotating speed.
According to an embodiment of the present application, before the controlling continues to increase the rotation speed of the indoor fan, the method further includes: and detecting and recognizing the rotating speed of the indoor fan as the maximum rotating speed, stopping increasing the rotating speed of the indoor fan, and controlling the indoor fan to continuously operate at the maximum rotating speed.
According to an embodiment of the present application, the method for detecting refrigerant leakage of an air conditioner further includes: and acquiring the running duration of the indoor fan at the maximum rotating speed, detecting and recognizing that the running duration is greater than or equal to a preset duration, and controlling the air conditioner to send fault information to remind that refrigerant leakage occurs and/or control the air conditioner to be closed.
According to an embodiment of the present application, the method for detecting refrigerant leakage of an air conditioner further includes: and controlling the air door to swing for air supply.
According to one embodiment of the present application, the gas comprises oxygen and nitrogen.
In order to achieve the above object, the present application provides a refrigerant leakage detecting device of an air conditioner, comprising: the acquisition module is used for acquiring a first concentration of gas in the air; and the identification module is used for identifying the refrigerant leakage of the air conditioner according to the first concentration of the gas.
According to an embodiment of the present application, the identification module is specifically configured to: and detecting and identifying that the first concentration of at least one gas is smaller than a first concentration threshold corresponding to the gas, and identifying that the air conditioner has refrigerant leakage.
According to an embodiment of the present application, the identification module is specifically configured to: and comparing the first concentration of each gas with the respective first concentration threshold, detecting and identifying that the first concentration of each gas is smaller than the respective first concentration threshold, and identifying that the air conditioner has refrigerant leakage.
According to an embodiment of the present application, the identification module is specifically configured to: and acquiring the total concentration of the first concentration of each gas, comparing the total concentration with a second concentration threshold, detecting and identifying that the total concentration is less than the second concentration threshold, and identifying that the refrigerant leakage of the air conditioner occurs.
According to an embodiment of the application, after the refrigerant leakage of the air conditioner is identified, the identification module is further configured to: controlling to open an air door in the air conditioner; and controlling to increase the current rotating speed of an indoor fan in the air conditioner.
According to an embodiment of the application, after the controlling increases the rotation speed of the indoor fan in the air conditioner, the identifying module is further configured to: reacquiring a second concentration of the gas at a predetermined interval; detecting and recognizing that the second concentration of at least one gas is still smaller than a corresponding preset concentration threshold value, controlling to continuously increase the rotating speed of the indoor fan, and returning to execute the interval preset time to obtain the second concentration of the gas again; and detecting and identifying that the second concentration of each gas is greater than or equal to the corresponding preset concentration threshold value, controlling to close an air door in the air conditioner, and recovering the rotating speed of the indoor fan to be the current rotating speed.
According to an embodiment of the application, before the controlling continues to increase the rotation speed of the indoor fan, the identifying module is further configured to: and detecting and recognizing the rotating speed of the indoor fan as the maximum rotating speed, stopping increasing the rotating speed of the indoor fan, and controlling the indoor fan to continuously operate at the maximum rotating speed.
According to an embodiment of the present application, the refrigerant leakage detecting device of an air conditioner further includes: the first control module is used for obtaining the running duration of the indoor fan at the maximum rotating speed, detecting and recognizing that the running duration is longer than or equal to a preset duration, and controlling the air conditioner to send out fault information to remind that refrigerant leakage occurs and/or controlling the air conditioner to be closed.
According to an embodiment of the present application, the refrigerant leakage detecting device of an air conditioner further includes: and the second control module is used for controlling the air door to swing for air supply.
According to one embodiment of the present application, the gas comprises oxygen and nitrogen.
In order to achieve the above object, the present application provides an air conditioner including the refrigerant leakage detection device of the air conditioner.
In order to achieve the above object, the present application provides an electronic device, which includes a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor executes the program to implement the refrigerant leakage detection method of the air conditioner.
In order to achieve the above object, the present application provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the above refrigerant leakage detection method of an air conditioner.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. the first concentration of gaseous in this application can acquire the air to according to gaseous first concentration, the refrigerant is revealed to the discernment air conditioner appearance. Therefore, whether the refrigerant of the air conditioner leaks is judged by detecting the concentration of gas in the air, the use types of the sensors are reduced, the detection cost is reduced, and meanwhile, the risk that whether the refrigerant leaks cannot be effectively detected due to the fact that the refrigerant sensor types are mistakenly used when the refrigerant sensor is used is avoided.
2. The first concentration of at least one gas can be detected and identified to be smaller than the first concentration threshold corresponding to the gas, the refrigerant leakage of the air conditioner is identified, the detection accuracy is greatly improved, the use types of the sensors are reduced, and the detection cost is reduced.
3. The first concentration of each gas can be compared with the respective first concentration threshold value, the first concentration of each gas is detected and identified to be smaller than the respective first concentration threshold value, and the refrigerant leakage of the air conditioner is identified. Therefore, the first concentration of each gas is compared with the respective first concentration threshold value, whether the air conditioner leaks the refrigerant or not is identified according to the comparison result, and the detection accuracy is effectively improved by simultaneously detecting that the first concentration of each gas is smaller than the respective first concentration threshold value.
4. The total concentration of the first concentration of each gas can be obtained, the total concentration is compared with a second concentration threshold value, the total concentration is detected and identified to be smaller than the second concentration threshold value, and the refrigerant leakage of the air conditioner is identified. Therefore, the total concentration of various gases is detected, and whether the air conditioner leaks the refrigerant or not is identified according to the total concentration, so that the detection effect of the refrigerant is achieved, and the detection cost is greatly reduced.
Drawings
Fig. 1 is a flowchart illustrating a refrigerant leakage detection method of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a flowchart illustrating a refrigerant leakage detecting method of an air conditioner according to an embodiment of the present application;
fig. 3 is a flowchart illustrating a refrigerant leakage detecting method of an air conditioner according to another embodiment of the present application;
fig. 4 is a flowchart illustrating a refrigerant leakage detecting method of an air conditioner according to still another embodiment of the present application;
fig. 5 is a flowchart illustrating a refrigerant leakage detecting method of an air conditioner according to an embodiment of the present application;
fig. 6 is a block diagram illustrating a refrigerant leakage detecting apparatus of an air conditioner according to an embodiment of the present application;
FIG. 7 is a block schematic diagram of an air conditioner according to an embodiment of the present application;
FIG. 8 is a block schematic diagram of an electronic device according to an embodiment of the application.
Detailed Description
The first concentration of gaseous in this application can acquire the air to according to gaseous first concentration, the refrigerant is revealed to the discernment air conditioner appearance. Therefore, whether the refrigerant of the air conditioner leaks is judged by detecting the concentration of gas in the air, the use types of the sensors are reduced, the detection cost is reduced, and meanwhile, the risk that whether the refrigerant leaks cannot be effectively detected due to the fact that the refrigerant sensor types are mistakenly used when the refrigerant sensor is used is avoided.
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.
An air conditioner and a method and an apparatus for detecting refrigerant leakage of the air conditioner according to embodiments of the present application are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating a refrigerant leakage detection method of an air conditioner according to an embodiment of the present disclosure. As shown in fig. 1, the refrigerant leakage detecting method of the air conditioner includes the following steps:
s1, a first concentration of a gas in the air is obtained.
According to one embodiment of the present application, the gas may include oxygen and nitrogen.
It should be understood that, due to the characteristics of the refrigerant, when the concentration of the refrigerant (such as the refrigerant R32, R290, etc.) reaches a certain value, there is a possibility that the refrigerant may be burnt or even exploded when encountering a fire source, and therefore, it is important to detect whether the refrigerant leaks. It is noted that R32 is a single-working-medium refrigerant, also known as difluoromethane, with the molecular formula CH2F2Belonging to highly combustible refrigerants; r290 is a single-working-medium refrigerant, also called propane, with molecular formula C3H8Belonging to flammable and explosive refrigerants.
In actual life, the air is mainly nitrogen and oxygen, the nitrogen accounts for 78% and the oxygen accounts for 21%, and when a refrigerant leaks in the air conditioner, the concentration of gas (such as oxygen) in the air is reduced, so that whether the refrigerant leaks in the air conditioner can be indirectly judged according to the concentration of the gas in the air by detecting the concentration of the gas in the air.
For example, taking the first concentration of oxygen and nitrogen in the air as an example, the embodiment of the present application may obtain the first concentration of oxygen in the air by the oxygen concentration sensor, and obtain the first concentration of nitrogen in the air by the nitrogen concentration sensor.
Preferably, the oxygen concentration sensor may be an ambient temperature electrochemical oxygen sensor that is partially sealed, cylindrical in shape of 1-1/4 inches in diameter and approximately 0.75 inches high, and may include two different electrodes immersed in an electrolyte solution, a conventional electrolyte solution being KOH. Oxygen molecules diffuse through a semi-permeable mold on one side of the electrochemical oxygen sensor at the ambient temperature to form OH ions on the cathode, and the OH ions migrate to the anode to undergo an oxidation reaction. During this process, oxygen molecules are reduced, oxidation reactions occur, and an electric current is established between the cathode and the anode, the magnitude of which is proportional to the concentration of oxygen in the sample. The current between the electrodes is detected by other electronic equipment, information is transmitted to the electric controller, and the electric controller performs corresponding processing after receiving the signal, namely the first concentration of the oxygen is obtained.
Preferably, the oxygen concentration sensor may also be another electrochemical oxygen sensor. The electrochemical oxygen sensor is adopted to directly react with the gas to be detected in the air in a diffusion mode to generate a linear voltage signal, a circuit is composed of a plurality of integrated circuits, the signal is amplified, A/D (analog/digital) converted and the like are carried out, then information is transmitted to an electric controller, and the electric controller carries out corresponding processing after receiving the signal, namely the first concentration of the oxygen is obtained.
It should be noted that there are many types of nitrogen concentration sensors, which are not described in detail herein to reduce redundancy, and the above-mentioned oxygen concentration sensors are merely exemplary and are not intended to limit the present invention.
And S2, recognizing the refrigerant leakage of the air conditioner according to the first concentration of the gas.
It should be understood that when the refrigerant of the air conditioner leaks, the first concentration of the gas in the air changes, and therefore, whether the refrigerant of the air conditioner leaks can be judged by identifying the first concentration of the gas in the air.
In summary, according to the refrigerant leakage detection method of the air conditioner in the embodiment of the present application, the first concentration of the gas in the air can be obtained, and the refrigerant leakage of the air conditioner can be identified according to the first concentration of the gas. Therefore, whether the refrigerant of the air conditioner leaks is judged by detecting the concentration of oxygen and nitrogen in the air, the use types of the sensors are reduced, the detection cost is reduced, and meanwhile, the risk that whether the refrigerant leaks cannot be effectively detected due to the fact that the refrigerant sensor is mistakenly used when the refrigerant sensor is used can be avoided.
It should be understood that there are various ways to identify the refrigerant leakage of the air conditioner according to the first concentration of the gas, and the following description is given by way of example with reference to the following specific embodiments:
fig. 2 is a flowchart illustrating a refrigerant leakage detection method of an air conditioner according to an exemplary embodiment. As shown in fig. 2, the method includes:
s201, acquiring a first concentration of gas in the air.
For example, taking the first concentration of oxygen and nitrogen in the air as an example, the embodiment of the present application may obtain the first concentration of oxygen in the air by the oxygen concentration sensor, and obtain the first concentration of nitrogen in the air by the nitrogen concentration sensor.
S202, detecting and identifying that the first concentration of at least one gas is smaller than the first concentration threshold corresponding to the gas, and identifying that the air conditioner has refrigerant leakage.
It can be understood that, when refrigerant leakage does not occur in the air conditioner, the first concentration of the gas in the air may fluctuate within a preset range, and when refrigerant leakage occurs in the air conditioner, the first concentration of the gas (such as oxygen) in the air may become smaller, so that a first concentration threshold corresponding to the detected gas may be preset, and whether refrigerant leakage occurs in the air conditioner may be identified by comparing the magnitude between the detected first concentration of the gas and the corresponding first concentration threshold.
For example, taking the first concentration of oxygen and nitrogen in the air as an example, the first concentration threshold corresponding to the oxygen may be a value between 19 and 21; the first concentration threshold for nitrogen may be a value between 76 and 78. The embodiment of the application can detect the first concentration of oxygen in the air and the first concentration of nitrogen in the air in real time by arranging the oxygen concentration sensor and the nitrogen concentration sensor, and the first concentration threshold value corresponding to the oxygen is assumed to be 20, and the first concentration threshold value corresponding to the nitrogen is assumed to be 77. If the first concentration of the oxygen in the air is 18, whether the first concentration of the nitrogen is smaller than the first concentration threshold value corresponding to the nitrogen or not is judged, and whether the first concentration of the oxygen is smaller than the first concentration threshold value corresponding to the oxygen 20 or not is judged, the refrigerant leakage of the air conditioner is identified; if the first concentration of the nitrogen in the air is 70, whether the first concentration of the oxygen is smaller than the first concentration threshold value 77 corresponding to the nitrogen or not is judged, and whether the first concentration of the nitrogen is smaller than the first concentration threshold value 77 corresponding to the oxygen or not is judged, the refrigerant leakage of the air conditioner is identified; and if the first concentration of the oxygen in the air is 18 and the first concentration of the nitrogen in the air is 70, identifying that the air conditioner has refrigerant leakage. That is, if the detected gas in the air has a first concentration of one gas smaller than a first concentration threshold corresponding to the gas, it is identified that the air conditioner has refrigerant leakage.
Fig. 3 is a flowchart illustrating a refrigerant leakage detecting method of an air conditioner according to another specific exemplary embodiment. As shown in fig. 3, the method includes:
s301, acquiring a first concentration of gas in the air.
For example, taking the first concentration of oxygen and nitrogen in the air as an example, the embodiment of the present application may obtain the first concentration of oxygen in the air by the oxygen concentration sensor, and obtain the first concentration of nitrogen in the air by the nitrogen concentration sensor.
S302, comparing the first concentration of each gas with the respective first concentration threshold value, detecting and identifying that the first concentration of each gas is smaller than the respective first concentration threshold value, and identifying that the air conditioner has refrigerant leakage.
It should be understood that when refrigerant leakage does not occur in the air conditioner, the first concentration of the gas in the air may fluctuate within a preset range, and when refrigerant leakage occurs in the air conditioner, the first concentration of the gas (such as oxygen) in the air may become smaller, and therefore, a first concentration threshold corresponding to the detected gas may be preset, and whether refrigerant leakage occurs in the air conditioner may be identified by comparing the magnitude between the detected first concentration of the gas and the corresponding first concentration threshold. The first concentration threshold corresponding to oxygen may be a value between 19 and 21; the first concentration threshold for nitrogen may be a value between 76 and 78.
For example, taking the first concentration of oxygen and nitrogen in the air as an example, the first concentration threshold corresponding to the oxygen may be a value between 19 and 21; the first concentration threshold for nitrogen may be a value between 76 and 78. The embodiment of the application can detect the first concentration of oxygen in the air and the first concentration of nitrogen in the air in real time by arranging the oxygen concentration sensor and the nitrogen concentration sensor, and the first concentration threshold value corresponding to the oxygen is assumed to be 20, and the first concentration threshold value corresponding to the nitrogen is assumed to be 77. If the first concentration of the oxygen in the air is 18 and the first concentration of the nitrogen in the air is 70, the refrigerant leakage of the air conditioner is identified because the first concentration of the oxygen 18 is smaller than the first concentration threshold value 20 corresponding to the oxygen and the first concentration of the nitrogen 70 is smaller than the first concentration threshold value 77 corresponding to the nitrogen. That is, when the first concentration of each gas in the air is detected to be less than the respective first concentration threshold, the air conditioner is identified to have refrigerant leakage.
Fig. 4 is a flowchart illustrating a refrigerant leakage detecting method of an air conditioner according to still another exemplary embodiment. As shown in fig. 4, the method includes:
s401, acquiring a first concentration of gas in the air.
For example, taking the first concentration of oxygen and nitrogen in the air as an example, the embodiment of the present application may obtain the first concentration of oxygen in the air by the oxygen concentration sensor, and obtain the first concentration of nitrogen in the air by the nitrogen concentration sensor.
S402, obtaining the total concentration of the first concentration of each gas, comparing the total concentration with a second concentration threshold value, detecting and identifying that the total concentration is smaller than the second concentration threshold value, and identifying that the refrigerant leakage of the air conditioner occurs.
It should be understood that, when refrigerant leakage does not occur in the air conditioner, the total concentration of the first concentration of each gas in the air may fluctuate within a preset range, and when refrigerant leakage occurs in the air conditioner, the total concentration of the first concentration of each gas in the air may become small, and therefore, a second concentration threshold value may be preset, and whether refrigerant leakage occurs in the air conditioner may be identified by comparing the detected total concentration of the first concentration of each gas in the air with the second concentration threshold value.
For example, taking the total concentration of the first concentrations of oxygen and nitrogen in the air as an example, the total concentration of oxygen and nitrogen is generally 99%, and in order to avoid errors, the second concentration threshold may be set to a value between 96 and 99. The embodiment of the application can detect the first concentration of oxygen in the air and the first concentration of nitrogen in the air in real time by arranging the oxygen concentration sensor and the nitrogen concentration sensor, and the second concentration threshold value is assumed to be 95. If the total concentration of the first concentrations of oxygen and nitrogen in the air is 90, the refrigerant leakage of the air conditioner is identified because the total concentration 90 is smaller than a second concentration threshold value 95. That is, when it is detected that the total concentration of the first concentration of each gas in the air is less than the second concentration threshold, it is identified that the refrigerant leakage of the air conditioner occurs.
According to an embodiment of the present application, after the refrigerant leakage of the air conditioner is identified, the method further includes: controlling to open an air door in the air conditioner; controlling to increase the current rotating speed of an indoor fan in the air conditioner.
It can be understood that, when the refrigerant of the air conditioner leaks, if the leaked refrigerant cannot be diffused to a larger space in time, when the concentration of the refrigerant reaches a certain value, the accident of combustion or even explosion may occur when the refrigerant meets the fire source. Therefore, after the air conditioner leaks the refrigerant, the air door of the air conditioner can be controlled to be opened, the current rotating speed of the indoor fan in the air conditioner is increased, the leaked refrigerant is diffused to a large space, the concentration of the refrigerant is reduced, and safety accidents are avoided. From this, through the control to indoor fan and well air door, make the refrigerant diffusion of revealing to bigger space, effectively prevent piling up of refrigerant, avoid the emergence of incident, improve the security of air conditioner.
According to an embodiment of the present application, after controlling to increase the rotation speed of the indoor fan in the air conditioner, the method further includes: reacquiring a second concentration of the gas at a predetermined interval; detecting and recognizing that the second concentration of at least one gas is still smaller than the corresponding preset concentration threshold value, controlling to continuously increase the rotating speed of the indoor fan, and returning to execute the interval preset time to obtain the second concentration of the gas again; and detecting and identifying that the second concentration of each gas is greater than or equal to the corresponding preset concentration threshold value, controlling to close an air door in the air conditioner, and recovering the rotating speed of the indoor fan to be the current rotating speed.
For example, taking the concentration of oxygen and nitrogen in the air as an example, assuming that the initial operating state of the air conditioner is S0, after the refrigerant leakage of the air conditioner is identified, controlling to open a damper in the air conditioner and controlling to increase the current rotating speed of an indoor fan in the air conditioner, where the operating state of the air conditioner is S1; after the time t1, acquiring the second concentrations of oxygen and nitrogen in the air again, and if at least one of the second concentrations of oxygen and nitrogen in the air is smaller than the corresponding preset concentration threshold, continuing to control to increase the rotating speed of the indoor fan, wherein the operating state of the air conditioner is S2, so that the refrigerant is diffused to a larger space; after the interval t2, acquiring the second concentrations of oxygen and nitrogen in the air again, if the second concentrations of oxygen and nitrogen in the air are greater than or equal to the corresponding preset concentration threshold values, controlling to close an air door in the air conditioner, and restoring the rotating speed of the indoor fan to be the current rotating speed, namely restoring the running state of the air conditioner to be S1, if at least one of the second concentrations of oxygen and nitrogen in the air is still less than the corresponding preset concentration threshold value, continuing to control to increase the rotating speed of the indoor fan, wherein the running state of the air conditioner is S3, so that the refrigerant is diffused to a larger space; the circulation is repeated, so that the leaked refrigerant is diffused to a larger space, the accumulation of the refrigerant is effectively prevented, and the safety of the air conditioner is improved. It should be noted that when the rotating speed of the indoor fan is increased, the rotating speed of the indoor fan can be increased according to a preset increasing proportion, the rotating speed of the fan can also be increased according to a fixed proportion, and the rotating speed of the fan can also be increased according to a fixed rotating speed; the time intervals t1, t2 may be of the same value.
Specifically, as shown in fig. 5, taking the concentration of the oxygen as an example, the method for detecting refrigerant leakage of an air conditioner includes the following steps:
s501, recording the current running state of the air conditioner S0, and acquiring a first concentration of oxygen.
S502, whether the first concentration of the oxygen is smaller than the first concentration threshold corresponding to the oxygen is judged, if yes, step S504 is executed, and if not, step S503 is executed.
S503, the current operation state of the air conditioner is maintained S0.
And S504, controlling to open a damper in the air conditioner and controlling to increase the current rotating speed of an indoor fan in the air conditioner, wherein the running state of the air conditioner is S1.
It should be noted that when the current rotation speed of the indoor fan in the air conditioner is controlled to be increased again, the air conditioner operation state is S2. That is, each time the control increases the current rotation speed of the indoor fan in the air conditioner, the air conditioner operation state is changed once, i.e., the plurality of air conditioner operation states are S1, S2, S3, … …, Sn in sequence.
And S505, the second concentration of the oxygen is acquired again at the time of t 1.
It is understood that when the second concentration of oxygen is again obtained, the time interval may be t2, and the time intervals t1 and t2 may be the same value, and the cycle is repeated, i.e., the time intervals are t1, t2, … … and tn in sequence.
S506, judging whether the second concentration of the oxygen is smaller than a preset concentration threshold corresponding to the oxygen, if so, executing step S504, otherwise, executing step S507.
And S507, controlling the running state of the air conditioner to be the previous state.
It can be understood that, assuming that the air conditioner operation state is S3, when the second concentration of oxygen is greater than or equal to the preset concentration threshold corresponding to oxygen, the air conditioner operation state is controlled to be S2; assuming that the air conditioner is in the operating state of S2, when the second concentration of oxygen is greater than or equal to the preset concentration threshold corresponding to the oxygen, the air conditioner is controlled to be in the operating state of S1, that is, the air conditioner is controlled to be in the operating state of Sn, and when the second concentration of oxygen is greater than or equal to the preset concentration threshold corresponding to the oxygen, the air conditioner is controlled to be in the current operating state of Sn-1.
It should be noted that the method for determining whether the refrigerant leaks by obtaining the concentration of nitrogen or other gases in the air is the same as the method for determining whether the refrigerant leaks by obtaining the concentration of oxygen, and detailed description is omitted here to avoid redundancy.
According to an embodiment of the application, before controlling to continue increasing the rotation speed of the indoor fan, the method further includes: and detecting and identifying the rotating speed of the indoor fan as the maximum rotating speed, stopping increasing the rotating speed of the indoor fan, and controlling the indoor fan to continuously operate at the maximum rotating speed.
It can be understood that the indoor fan has the maximum rotation speed, and when the rotation speed of the indoor fan reaches the maximum rotation speed, the rotation speed of the indoor fan is not increased. Therefore, when controlling to increase the rotation speed of the indoor fan in the air conditioner, if the rotation speed of the indoor fan is the maximum rotation speed, the increase of the rotation speed of the indoor fan is stopped, and the indoor fan is kept to continue to operate at the maximum rotation speed. According to an embodiment of the present application, the method for detecting refrigerant leakage of an air conditioner further includes: the method comprises the steps of obtaining the running duration of an indoor fan at the maximum rotating speed, detecting and identifying whether the running duration is greater than or equal to preset duration, controlling an air conditioner to send fault information to remind that refrigerant leakage occurs, and/or controlling the air conditioner to be closed.
It should be understood that the preset duration can be a numerical value obtained after a large number of experiments, when the duration of the operation of the indoor fan at the maximum rotating speed reaches the preset duration, it is indicated that the leakage of the refrigerant is always detected, and the leakage of the refrigerant cannot be effectively controlled by the method, therefore, the user can be reminded by controlling the air conditioner to send fault information, or the air conditioner is controlled to be closed, or the user is reminded by controlling the air conditioner to send fault information, and the air conditioner is controlled to be closed, so that the safety problem caused by the leakage of the refrigerant is avoided, and the safety of the air conditioner is greatly improved.
According to an embodiment of the present application, the method for detecting refrigerant leakage of an air conditioner further includes: the air door is controlled to swing to supply air.
It should be understood that if the air door is a structure capable of swinging air, the air door can be controlled to swing to supply air when blowing air, so that the refrigerant is uniformly diffused, the refrigerant is prevented from being accumulated, and the safety of the air conditioner is greatly improved.
According to the refrigerant leakage detection method of the air conditioner, the first concentration of the gas in the air can be obtained, and the refrigerant leakage of the air conditioner can be identified according to the first concentration of the gas. Therefore, whether the refrigerant of the air conditioner leaks is judged by detecting the concentration of gas in the air, the use types of the sensors are reduced, the detection cost is reduced, and meanwhile, the risk that whether the refrigerant leaks cannot be effectively detected due to the fact that the refrigerant sensor types are mistakenly used when the refrigerant sensor is used is avoided.
Fig. 6 is a block diagram illustrating a refrigerant leakage detecting device of an air conditioner according to an embodiment of the present disclosure. As shown in fig. 6, the refrigerant leakage detecting device 10 of the air conditioner includes: an acquisition module 100 and a recognition module 200.
The obtaining module 100 is configured to obtain a first concentration of a gas in air. The identification module 200 is configured to identify refrigerant leakage of the air conditioner according to the first concentration of the gas.
According to an embodiment of the present application, the identification module is specifically configured to: and detecting and identifying that the first concentration of at least one gas is smaller than a first concentration threshold corresponding to the gas, and identifying that the air conditioner has refrigerant leakage.
According to an embodiment of the present application, the identification module is specifically configured to: and comparing the first concentration of each gas with the respective first concentration threshold, detecting and identifying that the first concentration of each gas is smaller than the respective first concentration threshold, and identifying that the air conditioner has refrigerant leakage.
According to an embodiment of the present application, the identification module is specifically configured to: and acquiring the total concentration of the first concentration of each gas, comparing the total concentration with a second concentration threshold, detecting and identifying that the total concentration is less than the second concentration threshold, and identifying that the refrigerant leakage of the air conditioner occurs.
According to an embodiment of the application, after the refrigerant leakage of the air conditioner is identified, the identification module is further configured to: controlling to open an air door in the air conditioner; and controlling to increase the current rotating speed of an indoor fan in the air conditioner.
According to an embodiment of the application, after the controlling increases the rotation speed of the indoor fan in the air conditioner, the identifying module is further configured to: reacquiring a second concentration of the gas at a predetermined interval; detecting and recognizing that the second concentration of at least one gas is still smaller than a corresponding preset concentration threshold value, controlling to continuously increase the rotating speed of the indoor fan, and returning to execute the interval preset time to obtain the second concentration of the gas again; and detecting and identifying that the second concentration of each gas is greater than or equal to the corresponding preset concentration threshold value, controlling to close an air door in the air conditioner, and recovering the rotating speed of the indoor fan to be the current rotating speed.
According to an embodiment of the application, before the controlling continues to increase the rotation speed of the indoor fan, the identifying module is further configured to: and detecting and recognizing the rotating speed of the indoor fan as the maximum rotating speed, stopping increasing the rotating speed of the indoor fan, and controlling the indoor fan to continuously operate at the maximum rotating speed.
According to an embodiment of the present application, the refrigerant leakage detecting device of an air conditioner further includes: the first control module is used for obtaining the running duration of the indoor fan at the maximum rotating speed, detecting and recognizing that the running duration is longer than or equal to a preset duration, and controlling the air conditioner to send out fault information to remind that refrigerant leakage occurs and/or controlling the air conditioner to be closed.
According to an embodiment of the present application, the refrigerant leakage detecting device of an air conditioner further includes: and the second control module is used for controlling the air door to swing for air supply.
According to one embodiment of the present application, the gas comprises oxygen and nitrogen.
It should be noted that the explanation of the embodiment of the refrigerant leakage detection method for an air conditioner in the foregoing embodiment is also applicable to the refrigerant leakage detection device for an air conditioner in this embodiment, and details are not repeated here.
According to the refrigerant leakage detection device of the air conditioner, the first concentration of gas in the air can be obtained through the acquisition module, and the refrigerant leakage of the air conditioner can be identified through the identification module according to the first concentration of the gas. Therefore, whether the refrigerant of the air conditioner leaks is judged by detecting the concentration of gas in the air, the use types of the sensors are reduced, the detection cost is reduced, and meanwhile, the risk that whether the refrigerant leaks cannot be effectively detected due to the fact that the refrigerant sensor types are mistakenly used when the refrigerant sensor is used is avoided.
As shown in fig. 7, the present application provides an air conditioner 20, and the air conditioner 20 includes the refrigerant leakage detecting device 10 of the air conditioner.
According to the air conditioner that this application embodiment provided, cross the concentration that detects gaseous in the air, judge whether the air conditioner refrigerant takes place to reveal, not only reduced the use kind of sensor, reduced the detection cost moreover, also can avoid simultaneously when using refrigerant sensor, lead to effectively detecting the risk whether the refrigerant reveals because of the refrigerant sensor kind of misuse.
As shown in fig. 8, an embodiment of the present application further provides an electronic device 1000, which includes: the memory 1100, the processor 1200 and the computer program stored in the memory 1200 and operable on the processor execute the program to implement the refrigerant leakage detecting method of the air conditioner.
The embodiment of the application also provides a computer readable storage medium, wherein a computer program is stored in the computer readable storage medium, and when the program is executed by a processor, the method for detecting the refrigerant leakage of the air conditioner is realized.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application 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 application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. 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 application can 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 the preferred embodiments of the present application 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 alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A refrigerant leakage detection method of an air conditioner is characterized by comprising the following steps:
acquiring a first concentration of gas in the air;
according to the first concentration of the gas, recognizing that a refrigerant leaks from the air conditioner;
the method comprises the steps of obtaining the running duration of an indoor fan at the maximum rotating speed, detecting and identifying that the running duration is greater than or equal to a preset duration, controlling the air conditioner to send out fault information to remind that refrigerant leakage occurs, and/or controlling the air conditioner to be closed;
after the refrigerant leakage of the air conditioner is identified, the method further comprises the following steps:
controlling to open an air door in the air conditioner;
controlling to increase the current rotating speed of an indoor fan in the air conditioner;
after the controlling and increasing the rotating speed of the indoor fan in the air conditioner, the method further comprises the following steps:
reacquiring a second concentration of the gas at a predetermined interval;
detecting and recognizing that the second concentration of at least one gas is still smaller than a corresponding preset concentration threshold value, controlling to continuously increase the rotating speed of the indoor fan, and returning to execute the interval preset time to obtain the second concentration of the gas again;
detecting and recognizing that the second concentration of each gas is greater than or equal to the corresponding preset concentration threshold value, controlling to close an air door in the air conditioner, and recovering the rotating speed of the indoor fan to be the current rotating speed;
before the control continues to increase the rotating speed of the indoor fan, the method further comprises the following steps:
and detecting and recognizing the rotating speed of the indoor fan as the maximum rotating speed, stopping increasing the rotating speed of the indoor fan, and controlling the indoor fan to continuously operate at the maximum rotating speed.
2. The method of claim 1, wherein the identifying the air conditioner of refrigerant leakage according to the first concentration of the gas comprises:
and detecting and identifying that the first concentration of at least one gas is smaller than a first concentration threshold corresponding to the gas, and identifying that the air conditioner has refrigerant leakage.
3. The method of claim 1, wherein the identifying the air conditioner of refrigerant leakage according to the first concentration of the gas comprises:
and comparing the first concentration of each gas with the respective first concentration threshold, detecting and identifying that the first concentration of each gas is smaller than the respective first concentration threshold, and identifying that the air conditioner has refrigerant leakage.
4. The method of claim 1, wherein the identifying the air conditioner of refrigerant leakage according to the first concentration of the gas comprises:
and acquiring the total concentration of the first concentration of each gas, comparing the total concentration with a second concentration threshold, detecting and identifying that the total concentration is less than the second concentration threshold, and identifying that the refrigerant leakage of the air conditioner occurs.
5. The method of claim 1, further comprising:
and controlling the air door to swing for air supply.
6. The method of any one of claims 1-4, wherein the gas comprises oxygen and nitrogen.
7. A refrigerant leakage detection device of an air conditioner is characterized by comprising:
the acquisition module is used for acquiring a first concentration of gas in the air;
the identification module is used for identifying the refrigerant leakage of the air conditioner according to the first concentration of the gas;
the first control module is used for obtaining the running duration of the indoor fan at the maximum rotating speed, detecting and identifying that the running duration is greater than or equal to a preset duration, and controlling the air conditioner to send out fault information to remind that refrigerant leakage occurs and/or control the air conditioner to be turned off;
after the refrigerant leakage of the air conditioner is identified, the identification module is further used for: controlling to open an air door in the air conditioner; controlling to increase the current rotating speed of an indoor fan in the air conditioner;
after the control increases the rotating speed of the indoor fan in the air conditioner, the identification module is further configured to: reacquiring a second concentration of the gas at a predetermined interval; detecting and recognizing that the second concentration of at least one gas is still smaller than a corresponding preset concentration threshold value, controlling to continuously increase the rotating speed of the indoor fan, and returning to execute the interval preset time to obtain the second concentration of the gas again; detecting and recognizing that the second concentration of each gas is greater than or equal to the corresponding preset concentration threshold value, controlling to close an air door in the air conditioner, and recovering the rotating speed of the indoor fan to be the current rotating speed; before the control continues to increase the rotating speed of the indoor fan, the identification module is further configured to: and detecting and recognizing the rotating speed of the indoor fan as the maximum rotating speed, stopping increasing the rotating speed of the indoor fan, and controlling the indoor fan to continuously operate at the maximum rotating speed.
8. An air conditioner, comprising: the refrigerant leakage detecting device of an air conditioner as claimed in claim 7.
9. An electronic device, comprising: a memory, a processor;
the processor reads the executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the refrigerant leakage detection method of the air conditioner according to any one of claims 1 to 6.
10. A computer-readable storage medium storing a computer program, wherein the program, when executed by a processor, implements the refrigerant leakage detecting method of the air conditioner according to any one of claims 1 to 6.
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Effective date of registration: 20220118

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Patentee after: GD MIDEA AIR-CONDITIONING EQUIPMENT Co.,Ltd.

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Patentee after: SUN YAT-SEN University

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Patentee before: GD MIDEA AIR-CONDITIONING EQUIPMENT Co.,Ltd.

Patentee before: Midea Group Co., Ltd