CN114543258A - Refrigerant leakage detection method, air conditioner and computer storage medium - Google Patents
Refrigerant leakage detection method, air conditioner and computer storage medium Download PDFInfo
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- CN114543258A CN114543258A CN202011350998.XA CN202011350998A CN114543258A CN 114543258 A CN114543258 A CN 114543258A CN 202011350998 A CN202011350998 A CN 202011350998A CN 114543258 A CN114543258 A CN 114543258A
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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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- 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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Abstract
The invention discloses a method for detecting refrigerant leakage, which comprises the following steps: when an indoor fan of an air conditioner runs, acquiring a first concentration detected by a refrigerant sensor of the air conditioner; when the first concentration is smaller than the preset concentration, executing preset operation to slow down the air flow in the space where the refrigerant sensor is located; after the preset operation is executed, acquiring a second concentration detected by the refrigerant sensor; and judging whether refrigerant leakage exists according to the second concentration. The invention also discloses an air conditioner and a computer storage medium. When the indoor fan runs, the indoor fan executes preset operation to slow down air flow in the space where the refrigerant sensor is located, and by reducing diffusion of leaked refrigerants, the influence of the indoor fan on the concentration detected by the refrigerant sensor due to accelerated air flow is reduced, refrigerant leakage is detected more timely, and the safety of refrigerants of the air conditioner is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a refrigerant leakage detection method, an air conditioner and a computer storage medium.
Background
In an air conditioning system, a refrigerant sensor is generally provided to detect whether there is a refrigerant leak. When the refrigerant concentration detected by the refrigerant sensor is greater than a set alarm value, the refrigerant sensor gives an alarm.
When an indoor fan of the air conditioner runs, even if refrigerant leakage occurs, the leaked refrigerant is quickly diffused to other indoor areas under the influence of air outlet of the indoor unit, so that the refrigerant concentration detected by the refrigerant sensor is lower than the actual concentration of the refrigerant leakage, the refrigerant leakage alarm is not timely, and the risk caused by the refrigerant leakage is increased.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a refrigerant leakage detection method, an air conditioner and a computer storage medium, and aims to slow down the air flow in a space where a refrigerant sensor is located and reduce the influence of the accelerated air flow of an indoor fan on the concentration detected by the refrigerant sensor.
In order to achieve the above object, the present invention provides a method for detecting refrigerant leakage, comprising the steps of:
when an indoor fan of an air conditioner runs, acquiring a first concentration detected by a refrigerant sensor of the air conditioner;
when the first concentration is smaller than the preset concentration, executing preset operation to slow down the air flow in the space where the refrigerant sensor is located;
after the preset operation is executed, acquiring a second concentration detected by the refrigerant sensor;
and judging whether refrigerant leakage exists or not according to the second concentration.
Optionally, the preset operation includes at least one of:
reducing the rotating speed of the indoor fan;
and closing the fresh air function of the air conditioner.
Optionally, the step of determining whether there is refrigerant leakage according to the second concentration includes:
acquiring a preset concentration range, wherein the minimum concentration value in the preset concentration range is greater than or equal to the preset concentration;
and judging whether the second concentration is within the preset concentration range, wherein when the second concentration is within the preset concentration range, the refrigerant leakage is judged to exist, and when the second concentration is not within the preset concentration range, the refrigerant leakage is judged not to exist.
Optionally, after the step of determining whether the second concentration is within the preset concentration range, the method further includes:
and when the second concentration is not in the preset concentration range, outputting prompt information of abnormality of the refrigerant sensor.
Optionally, when the first concentration is less than a first preset concentration, the step of performing a preset operation includes:
when the first concentration is smaller than the preset concentration, timing is started;
and when the timing duration is greater than or equal to a first preset duration, executing the preset operation.
Optionally, after the step of obtaining the first concentration detected by the refrigerant sensor of the air conditioner, the step of the method for detecting refrigerant leakage further includes:
and judging that refrigerant leakage exists when the first concentration is greater than or equal to the preset concentration.
Optionally, the step of acquiring the first concentration detected by the refrigerant sensor of the air conditioner when the indoor fan of the air conditioner is running includes:
when the indoor fan runs, acquiring the continuous running time of the indoor fan;
and when the continuous operation time of the indoor fan is longer than a second preset time, acquiring a first concentration detected by a refrigerant sensor of the air conditioner.
Optionally, the step of obtaining the second concentration detected by the refrigerant sensor after the preset operation is performed includes:
and after a third preset time length of the preset operation is executed, acquiring a second concentration detected by the refrigerant sensor.
Optionally, the step of acquiring the first concentration detected by the refrigerant sensor of the air conditioner when the indoor fan of the air conditioner is running includes:
when the indoor fan runs, acquiring the ambient temperature of an action space of the air conditioner;
and when the temperature difference between the ambient temperature and the set temperature of the air conditioner is smaller than a preset difference value, acquiring a first concentration detected by a refrigerant sensor of the air conditioner.
Optionally, the method for detecting refrigerant leakage further includes:
and when the refrigerant leakage is judged to exist, outputting alarm prompt information and increasing the rotating speed of the indoor fan.
Further, to achieve the above object, the present invention also provides an air conditioner including: the detection program of the refrigerant leakage is stored in the memory and can be operated on the processor, and when being executed by the processor, the detection method of the refrigerant leakage realizes the steps of any one of the detection methods of the refrigerant leakage.
In order to achieve the above object, the present invention further provides a computer storage medium having a refrigerant leakage detection program stored thereon, wherein the detection program realizes the steps of the refrigerant leakage detection method described above when executed by a processor.
According to the refrigerant leakage detection method, the air conditioner and the computer storage medium provided by the embodiment of the invention, when an indoor fan of the air conditioner runs, a first concentration detected by a refrigerant sensor of the air conditioner is obtained, when the first concentration is smaller than a preset concentration, a preset operation is executed to slow down the air flow in a space where the refrigerant sensor is located, after the preset operation is executed, a second concentration detected by the refrigerant sensor is obtained, and whether refrigerant leakage exists is judged according to the second concentration. When the indoor fan runs, the indoor fan executes preset operation to slow down air flow in the space where the refrigerant sensor is located, and by reducing diffusion of leaked refrigerants, the influence of the indoor fan on the concentration detected by the refrigerant sensor due to accelerated air flow is reduced, refrigerant leakage is detected more timely, and the safety of refrigerants of the air conditioner is improved.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a refrigerant leakage detection according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating the detection of refrigerant leakage according to another embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating a refrigerant leakage detection according to another embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a solution, when an indoor fan runs, a preset operation is executed to slow down the air flow in the space where a refrigerant sensor is located, and by reducing the diffusion of leaked refrigerants, the influence of the indoor fan on the concentration detected by the refrigerant sensor when the air flow is accelerated is reduced, the refrigerant leakage is detected more timely, and the safety of the refrigerant of the air conditioner is improved.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention is an air conditioner, and the air conditioner is provided with a refrigerant sensor which is used for detecting whether a refrigerant circulating in the air conditioner leaks or not. The refrigerant sensor may be disposed inside or outside the air conditioner, for example, the refrigerant sensor may be disposed on an air outlet component of an air outlet of the air conditioner, or may be disposed at another position in the air conditioner where refrigerant leakage is likely to occur.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, and a memory 1004. The communication bus 1002 is used to implement connection communication among these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The memory 1004 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1004 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, the memory 1004, which is a computer storage medium, may include a user interface module and a refrigerant leakage detection program.
In the terminal shown in fig. 1, the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; the processor 1001 may be configured to call the detection program of the refrigerant leakage stored in the memory 1004, and perform the following operations:
when an indoor fan of an air conditioner runs, acquiring a first concentration detected by a refrigerant sensor of the air conditioner;
when the first concentration is smaller than the preset concentration, executing preset operation to slow down the air flow in the space where the refrigerant sensor is located;
after the preset operation is executed, acquiring a second concentration detected by the refrigerant sensor;
and judging whether refrigerant leakage exists according to the second concentration.
Further, the processor 1001 may call the refrigerant leakage detection program stored in the memory 1004, and further perform at least one of the following operations:
reducing the rotating speed of the indoor fan;
and closing the fresh air function of the air conditioner.
Further, the processor 1001 may call the detection program of the refrigerant leakage stored in the memory 1004, and further perform the following operations:
acquiring a preset concentration range, wherein the minimum concentration value in the preset concentration range is greater than or equal to the preset concentration;
and judging whether the second concentration is within the preset concentration range, wherein when the second concentration is within the preset concentration range, the refrigerant leakage is judged to exist, and when the second concentration is not within the preset concentration range, the refrigerant leakage is judged not to exist.
Further, the processor 1001 may call the detection program of the refrigerant leakage stored in the memory 1004, and further perform the following operations:
and when the second concentration is not in the preset concentration range, outputting prompt information of abnormality of the refrigerant sensor.
Further, the processor 1001 may call the detection program of the refrigerant leakage stored in the memory 1004, and further perform the following operations:
when the first concentration is smaller than the preset concentration, timing is started;
and when the timing duration is greater than or equal to a first preset duration, executing the preset operation.
Further, the processor 1001 may call the detection program of the refrigerant leakage stored in the memory 1004, and further perform the following operations:
and judging that the refrigerant leakage exists when the first concentration is greater than or equal to the preset concentration.
Further, the processor 1001 may call the detection program of the refrigerant leakage stored in the memory 1004, and further perform the following operations:
when the indoor fan runs, acquiring the continuous running time of the indoor fan;
and when the continuous operation time of the indoor fan is longer than a second preset time, acquiring a first concentration detected by a refrigerant sensor of the air conditioner.
Further, the processor 1001 may call the detection program of the refrigerant leakage stored in the memory 1004, and further perform the following operations:
and after a third preset time length of the preset operation is executed, acquiring a second concentration detected by the refrigerant sensor.
Further, the processor 1001 may call the detection program of the refrigerant leakage stored in the memory 1004, and further perform the following operations:
when the indoor fan runs, acquiring the ambient temperature of an action space of the air conditioner;
and when the temperature difference between the ambient temperature and the set temperature of the air conditioner is smaller than a preset difference value, acquiring a first concentration detected by a refrigerant sensor of the air conditioner.
Further, the processor 1001 may call the detection program of the refrigerant leakage stored in the memory 1004, and further perform the following operations:
and when the refrigerant leakage is judged to exist, outputting alarm prompt information and increasing the rotating speed of the indoor fan.
Referring to fig. 2, in an embodiment, the method for detecting refrigerant leakage includes the following steps:
step S10, when an indoor fan of an air conditioner runs, acquiring a first concentration detected by a refrigerant sensor of the air conditioner;
in this embodiment, the terminal of the embodiment is an air conditioner. The air conditioner is provided with a refrigerant sensor, and the refrigerant sensor is used for detecting refrigerants in nearby air and outputting corresponding concentration.
Alternatively, the refrigerant sensor may be disposed inside or outside the air conditioner, for example, the refrigerant sensor may be disposed in an air outlet or an air duct of the air conditioner, or the refrigerant sensor may be disposed on an air outlet component of the air outlet, and of course, the refrigerant sensor may also be disposed in other positions of the air conditioner where refrigerant leakage is likely to occur. When the refrigerant sensor is arranged at the air outlet, the concentration of the refrigerant detected by the refrigerant sensor is the concentration of the refrigerant blown to the environment from the inside of the air conditioner, and the leaked refrigerant can be fully mixed with air and flows to the air outlet, so that the concentration of the refrigerant at the air outlet can more accurately reflect the average concentration of the leaked refrigerant inside the air conditioner, and the danger of refrigerant leakage can be accurately presumed according to concentration data detected by the refrigerant sensor.
Optionally, the refrigerant sensor detects the refrigerant concentration in real time or at regular time. When the concentration detected by the refrigerant sensor is greater than the preset concentration, the refrigerant leakage is indicated to be generated currently, and the concentration of the leaked refrigerant is higher, so that alarm information can be output to prompt a user to generate the refrigerant leakage.
Optionally, an application scenario of the present embodiment is refrigerant leakage detection when the indoor fan operates, wherein the refrigerant sensor is disposed at a position where air flow can be affected by air outlet of the indoor fan. Therefore, when the indoor fan operates, the first concentration detected by the refrigerant sensor of the air conditioner is obtained.
Optionally, when the indoor fan operates, the continuous operation time of the indoor fan is obtained, and when the continuous operation time of the indoor fan is longer than a second preset time, the first concentration detected by a refrigerant sensor of the air conditioner is obtained again, and by setting the second preset time, the air flow and the refrigerant concentration of a detection position where the refrigerant sensor is located tend to be stable, and the obtained first concentration is more accurate.
Optionally, in order to avoid that the normal operation of the air conditioner is affected by frequent execution of preset operation by the air conditioner, when the indoor fan operates, the ambient temperature of the acting space of the air conditioner may be obtained, when a temperature difference between the ambient temperature and the set temperature of the air conditioner is smaller than a preset difference value, it is indicated that the air conditioner is about to or has reached a warm shutdown, and the execution of the preset operation may not cause a large influence on the normal function of the air conditioner, so that the acquisition of the first concentration detected by the refrigerant sensor of the air conditioner and the subsequent steps thereof may be performed.
Step S20, when the first concentration is smaller than a preset concentration, executing a preset operation to slow down the air flow in the space where the refrigerant sensor is located;
in this embodiment, when the first concentration is less than the preset concentration, it indicates that there may be refrigerant leakage at present, but the leaked refrigerant is less, or the leaked refrigerant is diffused at an accelerated speed under the action of the indoor fan, so that the concentration of the refrigerant detected by the refrigerant sensor is relatively low, and therefore, a preset operation may be performed to slow down the air flow in the space where the refrigerant sensor is located, and reduce the influence of the operation of the indoor fan on the concentration of the leaked refrigerant.
Optionally, the preset operation comprises at least one of: reduce indoor fan's rotational speed, through the reduction of indoor fan rotational speed, slow down the air flow of the detection position at refrigerant sensor place, wherein, refrigerant sensor sets up in can being influenced the position that the air flows by indoor fan air-out, for example, refrigerant sensor can set up in the wind channel of air conditioner or air outlet, or, if the new trend function of air conditioner has opened, can close the new trend function of air conditioner, through stopping blowing new trend to indoor, slow down the air flow of the detection position at refrigerant sensor place, wherein, refrigerant sensor can set up in can being influenced the position that the air flows by the new trend, for example, refrigerant sensor can set up in the new trend wind channel or new trend air outlet of air conditioner, with through stopping blowing new trend to indoor, reduce the wind speed in the new trend wind channel and new trend air outlet.
Optionally, the step of reducing the rotation speed of the indoor fan comprises: and closing the indoor fan or switching the rotating speed of the indoor fan from a high rotating speed gear to a low rotating speed gear.
Optionally, when the first concentration is detected to be less than the preset concentration, timing is started, and when the timing duration is greater than or equal to the first preset duration, a preset operation is executed, and by setting the first preset duration, the concentration of the refrigerant detected by the refrigerant sensor tends to be stable, and the judgment that refrigerant leakage may occur is more accurate.
Optionally, when the first concentration is detected to be greater than or equal to the preset concentration, it is indicated that refrigerant leakage occurs currently, and the leaked refrigerant concentration is high, so that the refrigerant leakage is determined to exist, and alarm information is output to prompt a user that the refrigerant leakage occurs.
Step S30, after the preset operation is executed, acquiring a second concentration detected by the refrigerant sensor;
in this embodiment, after the preset operation is performed, the air flow rate at the detection position of the refrigerant sensor is slowed, and since the refrigerant leakage is a continuous process, if the refrigerant leakage does exist, the concentration of the refrigerant detected by the refrigerant sensor gradually increases and tends to be stable after the preset operation is performed, so that the second concentration detected by the refrigerant sensor can be obtained to determine whether the refrigerant leakage does exist according to the second concentration.
Optionally, after a third preset time period of the preset operation is executed, the second concentration detected by the refrigerant sensor is obtained, and by setting the third preset time period, the air flow and the refrigerant concentration at the detection position where the refrigerant sensor is located tend to be stable, and the second concentration detected by the refrigerant sensor is more accurate.
And step S40, determining whether there is refrigerant leakage according to the second concentration.
In this embodiment, when determining whether there is refrigerant leakage according to the second concentration, it may be detected whether the second concentration is increased compared to the first concentration, if the second concentration is increased compared to the first concentration, it indicates that there is refrigerant leakage, the refrigerant sensor operates normally, if the second concentration is not increased compared to the first concentration, it indicates that there is no refrigerant leakage, the refrigerant sensor operates abnormally, and the refrigerant concentration detected by the refrigerant sensor is caused by aging of the refrigerant sensor, performance degradation, or sensor drift, and may output a prompt message indicating that the refrigerant sensor is abnormal.
Alternatively, when detecting whether the second concentration is increased compared with the first concentration, the second concentration may be directly compared with the first concentration, and when the second concentration is greater than the first concentration, it is determined that there is an increase in the second concentration compared with the first concentration, and there is refrigerant leakage. Optionally, since the concentration of the refrigerant at the detection position where the refrigerant sensor is located may fluctuate, when the second concentration is greater than the first concentration, a difference between the second concentration and the first concentration may be further obtained, and when the difference is greater than a preset difference, it is determined that the second concentration is increased compared with the first concentration, and refrigerant leakage exists.
Alternatively, when it is determined whether there is refrigerant leakage according to the second concentration, the second concentration may be obtained in real time or at regular time, and a variation curve of the second concentration may be generated, and it is determined whether there is refrigerant leakage according to the variation curve, for example, when the variation curve is gradually increased first and then gradually increased, it is determined that there is refrigerant leakage.
Optionally, when the refrigerant leakage is judged to exist, alarm prompt information can be output to prompt a user that the refrigerant leakage exists and to improve the rotating speed of the indoor fan, diffusion of the leaked refrigerant is accelerated through improvement of the rotating speed of the indoor fan, and potential safety hazards caused by gathering of the leaked refrigerant are avoided.
In the technical scheme disclosed in the embodiment, when the indoor fan operates, the preset operation is executed to slow down the air flow in the space where the refrigerant sensor is located, and by reducing the diffusion of leaked refrigerants, the influence of the indoor fan on the concentration detected by the refrigerant sensor due to accelerated air flow is reduced, the refrigerant leakage is detected more timely, and the safety of the refrigerant of the air conditioner is improved.
In another embodiment, as shown in fig. 3, on the basis of the embodiment shown in fig. 2, the step S40 includes:
step S41, acquiring a preset concentration range, wherein the minimum concentration value in the preset concentration range is greater than or equal to the preset concentration;
in this embodiment, when detecting whether the second concentration is increased compared to the first concentration, a predetermined concentration range may be obtained to determine whether the second concentration is increased according to a comparison between the predetermined concentration range and the second concentration. The minimum concentration value in the preset concentration range is greater than or equal to the preset concentration, namely the first concentration is not in the first concentration range, and the first concentration is smaller than any concentration in the preset concentration range.
Step S42, determining whether the second concentration is within the preset concentration range, where if the second concentration is within the preset concentration range, it is determined that there is refrigerant leakage, and if the second concentration is not within the preset concentration range, it is determined that there is no refrigerant leakage.
In this embodiment, whether the second concentration is within a preset concentration range is determined, if the second concentration is within the preset concentration range, it is indicated that the second concentration is increased compared to the first concentration, the refrigerant sensor works normally, and refrigerant leakage is determined, and if the second concentration is not within the preset concentration range, it is indicated that the second concentration is not increased compared to the first concentration, the refrigerant sensor works abnormally, and the refrigerant concentration detected by the refrigerant sensor may be caused by aging and performance degradation of the sensor, so that refrigerant leakage is determined not to exist. Optionally, when the second concentration is not within the preset concentration range, outputting an abnormal prompt message of the refrigerant sensor to prompt a user of a failure of the refrigerant sensor.
In the technical scheme disclosed in this embodiment, by comparing the second concentration with the preset concentration range, it is determined whether the refrigerant leakage actually exists during the operation of the indoor fan, so that the refrigerant safety of the air conditioner is improved, and the false detection probability of the refrigerant sensor is reduced.
In another embodiment, as shown in fig. 4, on the basis of the embodiment shown in any one of fig. 2 to fig. 3, a first object of this embodiment is to provide a method for detecting refrigerant leakage during operation of a fan, in which the operation of the fan is actively stopped, and a change in concentration before and after the operation of the fan is compared to determine whether leakage occurs, so that the capability of detecting and identifying leakage during operation of the fan is improved, and the risk caused by leakage is reduced.
A second objective of this embodiment is to provide an air conditioner with the leakage detection method, which has higher leakage detection and identification capability, can effectively identify leakage risks in more scenes, and has higher safety compared to a conventional air conditioner.
The present embodiment mainly aims at the scenes as follows: under the air conditioner running state, the fan operates, and refrigerant sensor detection concentration does not reach leakage alarm concentration this moment to last a period of time under this concentration range, there is leakage potential safety hazard in the air conditioner this moment, but only relies on sensor alarming function can't effectively discern this risk.
As shown in fig. 4, the present embodiment proposes a leak detection and identification method for this scenario:
1. and when the air conditioner fan is operated and lasts for a time exceeding T0, detecting the concentration of the refrigerant. The leakage judgment is carried out when the fan operates for a period of time, because if interference substances exist, the interference substances can be diffused along with the airflow after the fan operates for a period of time, so that the false detection caused by the interference substances is avoided;
2. if the concentration is in interval 1 and the duration is greater than T1, there may be a risk of leakage at this point, which needs to be further identified. The concentration interval 1 is defined as a concentration range (a, b), wherein in an actual situation, timely leakage of a refrigerant may occur, the concentration of the refrigerant detected by a sensor is still 0 due to the diffusion effect of fan airflow, so that a is a number greater than or equal to 0, b is a refrigerant sensor alarm set value, the unit is ppm, T1 represents time and the unit is s, and the time is limited to be a certain time T1, so as to prevent the sensor reading from fluctuating occasionally due to various conditions; if the concentration is in the interval 2 at this time, it indicates that a relatively serious leak has occurred. Concentration interval 2 is defined as a concentration range that is not less than the sensor alarm concentration.
3. The further identification process comprises: stopping the operation of the fan for a duration not less than T2, detecting the concentration of the refrigerant, and if the concentration of the refrigerant rises after stopping the operation for a period of time and reaches an interval 2, indicating that the refrigerant leaks from the air conditioner at the moment, and the concentration of the refrigerant rises due to the accumulation of the refrigerant due to the lack of the diffusion effect of the airflow of the fan; if the refrigerant concentration does not change greatly after the operation is stopped for a period of time and does not rise to the section 2, the refrigerant leakage does not occur at this time, and the detected concentration may be caused by the performance attenuation/drift of the sensor.
In the technical scheme disclosed in the embodiment, the refrigerant leakage detection under the running condition of the fan is realized.
In addition, an embodiment of the present invention further provides an air conditioner, including: the detection program of the refrigerant leakage is executed by the processor to realize the steps of the detection method of the refrigerant leakage in the above embodiments.
In addition, an embodiment of the present invention further provides a computer storage medium, where a detection program of refrigerant leakage is stored on the computer storage medium, and when the detection program of refrigerant leakage is executed by a processor, the steps of the detection method of refrigerant leakage according to the above embodiments are implemented.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (12)
1. A method for detecting refrigerant leakage is characterized by comprising the following steps:
when an indoor fan of an air conditioner runs, acquiring a first concentration detected by a refrigerant sensor of the air conditioner;
when the first concentration is smaller than the preset concentration, executing preset operation to slow down the air flow in the space where the refrigerant sensor is located;
after the preset operation is executed, acquiring a second concentration detected by the refrigerant sensor;
and judging whether refrigerant leakage exists according to the second concentration.
2. The method for detecting refrigerant leakage according to claim 1, wherein the predetermined operation comprises at least one of:
reducing the rotating speed of the indoor fan;
and closing the fresh air function of the air conditioner.
3. The method for detecting refrigerant leakage according to claim 1, wherein the step of determining whether there is refrigerant leakage according to the second concentration includes:
acquiring a preset concentration range, wherein the minimum concentration value in the preset concentration range is greater than or equal to the preset concentration;
and judging whether the second concentration is within the preset concentration range, wherein when the second concentration is within the preset concentration range, the refrigerant leakage is judged to exist, and when the second concentration is not within the preset concentration range, the refrigerant leakage is judged not to exist.
4. The method for detecting refrigerant leakage according to claim 3, wherein after the step of determining whether the second concentration is within the preset concentration range, the method further comprises:
and when the second concentration is not in the preset concentration range, outputting prompt information of abnormality of the refrigerant sensor.
5. The method for detecting refrigerant leakage according to claim 1, wherein the step of performing a predetermined operation when the first concentration is less than a first predetermined concentration comprises:
when the first concentration is smaller than the preset concentration, timing is started;
and when the timing duration is greater than or equal to a first preset duration, executing the preset operation.
6. The method for detecting refrigerant leakage according to claim 1, wherein after the step of obtaining the first concentration detected by the refrigerant sensor of the air conditioner, the method for detecting refrigerant leakage further comprises:
and judging that refrigerant leakage exists when the first concentration is greater than or equal to the preset concentration.
7. The method for detecting refrigerant leakage according to claim 1, wherein the step of acquiring the first concentration detected by the refrigerant sensor of the air conditioner while the indoor fan of the air conditioner is running comprises:
when the indoor fan runs, acquiring the continuous running time of the indoor fan;
and when the continuous operation time of the indoor fan is longer than a second preset time, acquiring a first concentration detected by a refrigerant sensor of the air conditioner.
8. The method for detecting refrigerant leakage according to claim 1, wherein the step of obtaining the second concentration detected by the refrigerant sensor after the predetermined operation is performed comprises:
and after a third preset time length of the preset operation is executed, acquiring a second concentration detected by the refrigerant sensor.
9. The method for detecting refrigerant leakage according to claim 1, wherein the step of acquiring the first concentration detected by the refrigerant sensor of the air conditioner while the indoor fan of the air conditioner is running comprises:
when the indoor fan runs, acquiring the ambient temperature of an action space of the air conditioner;
and when the temperature difference between the ambient temperature and the set temperature of the air conditioner is smaller than a preset difference value, acquiring a first concentration detected by a refrigerant sensor of the air conditioner.
10. The method of detecting refrigerant leakage according to any of claims 1 to 9, further comprising:
and when the refrigerant leakage is judged to exist, outputting alarm prompt information and increasing the rotating speed of the indoor fan.
11. An air conditioner, characterized in that the air conditioner comprises: a memory, a processor, and a detection program for refrigerant leakage stored in the memory and executable on the processor, wherein the detection program for refrigerant leakage realizes the steps of the method for detecting refrigerant leakage according to any one of claims 1 to 10 when executed by the processor.
12. A computer storage medium, wherein a refrigerant leakage detection program is stored on the computer storage medium, and the steps of the refrigerant leakage detection method according to any one of claims 1 to 10 are implemented when the refrigerant leakage detection program is executed by a processor.
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