CN115111707A - Air conditioner fluorine deficiency detection method, device, medium and chip - Google Patents
Air conditioner fluorine deficiency detection method, device, medium and chip Download PDFInfo
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- CN115111707A CN115111707A CN202210725374.4A CN202210725374A CN115111707A CN 115111707 A CN115111707 A CN 115111707A CN 202210725374 A CN202210725374 A CN 202210725374A CN 115111707 A CN115111707 A CN 115111707A
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- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 142
- 239000011737 fluorine Substances 0.000 title claims abstract description 142
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 135
- 230000007812 deficiency Effects 0.000 title claims abstract description 82
- 238000001514 detection method Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000002950 deficient Effects 0.000 claims abstract description 16
- 238000012937 correction Methods 0.000 claims description 18
- 125000001153 fluoro group Chemical group F* 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 6
- 101100447665 Mus musculus Gas2 gene Proteins 0.000 claims description 3
- 238000012512 characterization method Methods 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- F24F11/61—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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The disclosure relates to a method, a device, a medium and a chip for detecting fluorine deficiency of an air conditioner, wherein the method comprises the following steps: if the air conditioner is determined to meet the fluorine deficiency detection condition, controlling the running frequency of a compressor of the air conditioner to be kept unchanged; under the condition that the running frequency of the compressor is not changed, controlling the opening of an electronic expansion valve of the air conditioner, and respectively acquiring the exhaust temperature of the compressor under the condition that the opening of the electronic expansion valve is controlled to be different; and determining whether the air conditioner runs in a fluorine-deficient mode or not according to the exhaust temperature of the compressor. Through above-mentioned technical scheme, through changing behind the electronic expansion valve aperture, the compressor exhaust temperature under the different aperture circumstances carries out the judgement that the air conditioner lacks the fluorine operation, and the ageing that lacks fluorine judgement is better, and is difficult to trigger and lacks fluorine wrong report alarm, improves the accuracy that the air conditioner lacks fluorine and detects.
Description
Technical Field
The disclosure relates to the technical field of air conditioners, in particular to a method, a device, a medium and a chip for detecting fluorine deficiency of an air conditioner.
Background
Fluorine is a medium for transferring heat in an air conditioning system, heat cannot be effectively exchanged without fluorine, the air conditioner cannot refrigerate or heat, the problem of fluorine deficiency is high in concealment, and users can consider after-sales maintenance when the phenomena of poor refrigerating and heating effects, protective shutdown, water leakage of indoor units and the like generally occur. In addition, in the actual operation process of the air conditioner, the conditions of micro fluorine leakage and the like of a valve and other parts can exist, so that the air conditioner can execute fluorine-deficient operation, and in the fluorine-deficient operation process, because enough refrigerant is not available for cooling a winding of the compressor, the temperature of the winding can be increased, the service life of the compressor is influenced, and even the compressor is burnt, and whether the air conditioner is fluorine-deficient or not is difficult to accurately judge in the related technology.
Disclosure of Invention
In order to overcome the problems in the related art, the disclosure provides a method, a device, a medium and a chip for detecting the fluorine deficiency of the air conditioner.
According to a first aspect of the embodiments of the present disclosure, there is provided an air conditioner fluorine deficiency detection method, including:
if the air conditioner is determined to meet the fluorine deficiency detection condition, controlling the running frequency of a compressor of the air conditioner to be kept unchanged;
under the condition that the running frequency of the compressor is kept unchanged, controlling the opening of an electronic expansion valve of the air conditioner, and respectively acquiring the exhaust temperature of the compressor under the condition that the opening of the electronic expansion valve is controlled to be different;
and determining whether the air conditioner runs short of fluorine or not according to the exhaust temperature of the compressor.
Optionally, the controlling the opening of the electronic expansion valve of the air conditioner and respectively obtaining the discharge temperature of the compressor when the opening of the electronic expansion valve is controlled to be different openings includes:
controlling the opening degree of the electronic expansion valve to be maintained as the current opening degree;
under the condition that the time length for maintaining the opening degree of the electronic expansion valve to be the current opening degree reaches a first preset time length, acquiring the exhaust temperature of a first compressor, and controlling the opening degree of the electronic expansion valve to be adjusted to the maximum opening degree;
acquiring the exhaust temperature of a second compressor when the opening degree of the electronic expansion valve is maintained as the maximum opening degree and the time length reaches a second preset time length;
the determining whether the air conditioner runs short of fluorine or not according to the exhaust temperature of the compressor comprises the following steps:
and determining whether the air conditioner runs in a fluorine-deficient mode or not according to the first compressor exhaust temperature, the second compressor exhaust temperature, the current opening, the maximum opening and the compressor running frequency.
Optionally, the determining whether the air conditioner runs short of fluorine according to the first compressor discharge temperature, the second compressor discharge temperature, the current opening, the maximum opening and the compressor running frequency includes:
determining a frequency correction coefficient according to the running frequency of the compressor and the characteristic coefficient of the compressor;
determining fluorine-lacking characteristic information according to the first compressor exhaust temperature, the second compressor exhaust temperature, the frequency correction coefficient, the current opening and the maximum opening;
and determining that the air conditioner runs in the absence of fluorine under the condition that the fluorine-lacking characteristic information is less than or equal to a preset threshold value.
Optionally, the determining the fluorine deficiency characteristic information according to the first compressor discharge temperature, the second compressor discharge temperature, the frequency correction coefficient, the current opening degree and the maximum opening degree includes:
determining the fluorine deficiency characteristic information by the following formula:
α＝(T exhaust gas 1 -T Exhaust _2 )+λ(P max -P 1 )/10
Wherein, alpha represents fluorine deficiency characteristic information, T Exhaust gas 1 Indicating first compressor discharge temperature, T Exhaust _2 Denotes the second compressor discharge temperature, lambda denotes the frequency correction factor, P 1 Indicates the current opening degree, P max Indicating the maximum opening.
Optionally, before controlling the compressor operating frequency of the air conditioner to remain unchanged, the method further includes:
acquiring the starting operation time of the air conditioner;
under the condition that the starting operation time length reaches a third preset time length, acquiring the current indoor environment temperature, the current indoor heat exchanger coil temperature of the air conditioner and the current compressor operation frequency of the air conditioner in real time;
and if the duration of continuously meeting the preset condition reaches a fourth preset duration according to the current indoor environment temperature, the current indoor heat exchanger coil temperature and the current compressor running frequency, determining that the air conditioner meets the fluorine lack detection condition.
Optionally, the preset condition includes:
the absolute value of the difference between the current indoor heat exchanger coil temperature and the current indoor environment temperature is less than a specified temperature difference threshold; and the number of the first and second electrodes,
the current compressor operating frequency is greater than or equal to a preset frequency threshold.
Optionally, the specified temperature difference threshold is determined according to a preset correspondence between the compressor frequency and the temperature difference threshold, and the current compressor operating frequency.
According to a second aspect of the embodiments of the present disclosure, there is provided an air conditioner fluorine deficiency detection apparatus, which performs the detection method provided by the first aspect of the present disclosure, and includes:
the control module is used for controlling the running frequency of a compressor of the air conditioner to be kept unchanged if the air conditioner is determined to meet the fluorine deficiency detection condition;
the first acquisition module is used for controlling the opening of an electronic expansion valve of the air conditioner under the condition that the running frequency of the compressor is kept unchanged, and respectively acquiring the exhaust temperature of the compressor under the condition that the opening of the electronic expansion valve is controlled to be different;
the first determination module is used for determining whether the air conditioner runs in a fluorine-deficient mode or not according to the exhaust temperature of the compressor.
Optionally, the first obtaining module includes:
the control submodule is used for controlling the opening degree of the electronic expansion valve to be maintained at the current opening degree;
the first obtaining sub-module is used for obtaining the exhaust temperature of the first compressor under the condition that the time length for maintaining the opening degree of the electronic expansion valve to be the current opening degree reaches a first preset time length, and controlling the opening degree of the electronic expansion valve to be adjusted to the maximum opening degree;
the second obtaining submodule is used for obtaining the exhaust temperature of a second compressor when the time for maintaining the opening degree of the electronic expansion valve to be the maximum opening degree reaches a second preset time;
the first determining module includes:
and the first determining submodule is used for determining whether the air conditioner runs in a fluorine-deficient mode or not according to the first compressor exhaust temperature, the second compressor exhaust temperature, the current opening degree, the maximum opening degree and the compressor running frequency.
Optionally, the first determining sub-module includes:
the second determining submodule is used for determining a frequency correction coefficient according to the running frequency of the compressor and the characteristic coefficient of the compressor;
the third determining submodule is used for determining the fluorine-lacking characteristic information according to the first compressor exhaust temperature, the second compressor exhaust temperature, the frequency correction coefficient, the current opening and the maximum opening;
and the fourth determining submodule is used for determining that the air conditioner runs in the absence of fluorine under the condition that the characteristic information of the absence of fluorine is less than or equal to a preset threshold value.
Optionally, the third determining sub-module is configured to:
determining the fluorine deficiency characteristic information by the following formula:
α＝(T exhaust gas 1 -T Exhaust _2 )+λ(P max -P 1 )/10
Wherein, alpha represents fluorine deficiency characteristic information，T Exhaust _1 Indicating first compressor discharge temperature, T Exhaust _2 Denotes the second compressor discharge temperature, lambda denotes the frequency correction factor, P 1 Indicates the current opening degree, P max Indicating the maximum opening.
Optionally, the method further comprises:
the second acquisition module is used for acquiring the starting operation time of the air conditioner before the control module controls the operation frequency of the compressor of the air conditioner to be kept unchanged;
the third obtaining module is used for obtaining the current indoor environment temperature, the current indoor heat exchanger coil temperature of the air conditioner and the current compressor operation frequency of the air conditioner in real time under the condition that the starting operation time length reaches a third preset time length;
and the second determination module is used for determining that the air conditioner meets the fluorine lack detection condition if the duration continuously meeting the preset condition reaches a fourth preset duration according to the current indoor environment temperature, the current indoor heat exchanger coil temperature and the current compressor running frequency.
Optionally, the preset condition includes:
the absolute value of the difference between the current indoor heat exchanger coil temperature and the current indoor environment temperature is less than a specified temperature difference threshold; and the number of the first and second groups is,
the current compressor operating frequency is greater than or equal to a preset frequency threshold.
Optionally, the specified temperature difference threshold is determined according to a preset correspondence between the compressor frequency and the temperature difference threshold, and the current compressor operating frequency.
According to a third aspect of the embodiments of the present disclosure, there is provided an air conditioner fluorine deficiency detection apparatus, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to: the steps of the air conditioner fluorine deficiency detection method provided by the first aspect of the present disclosure are executed.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium, on which computer program instructions are stored, which when executed by a processor, implement the steps of the air conditioner fluorine deficiency detection method provided by the first aspect of the present disclosure.
According to a fifth aspect of embodiments of the present disclosure, there is provided a chip comprising a processor and an interface; the processor is used for reading instructions to execute the steps of the air conditioner fluorine deficiency detection method provided by the first aspect of the disclosure.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
through the technical scheme, if the air conditioner is determined to meet the fluorine deficiency detection condition, the operation frequency of the compressor of the air conditioner is controlled to be kept unchanged, the opening of the electronic expansion valve of the air conditioner is controlled under the condition that the operation frequency of the compressor is kept unchanged, the exhaust temperature of the compressor under the condition that the opening of the electronic expansion valve is controlled to be different openings is obtained respectively, and whether the air conditioner runs in the absence of fluorine is determined according to the exhaust temperature of the compressor. Therefore, when the air conditioner is determined to meet the fluorine deficiency detection condition, the operation frequency of the compressor and the opening degree of the electronic expansion valve are actively controlled, so that the operation frequency of the compressor and the opening degree of the electronic expansion valve enter an open-loop control mode, whether the air conditioner runs in the absence of fluorine can be judged by changing the opening degree of the electronic expansion valve and the exhaust temperature of the compressor under the condition of different opening degrees under the condition that the operation frequency of the compressor is unchanged, the timeliness of fluorine deficiency judgment is better, and a false fluorine deficiency alarm is not easy to trigger.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flowchart illustrating a fluorine deficiency detection method for an air conditioner according to an exemplary embodiment.
Fig. 2 is a flowchart illustrating a method for detecting fluorine deficiency in an air conditioner according to another exemplary embodiment.
Fig. 3 is a flowchart illustrating a method of determining whether an air conditioner is operating in the absence of fluorine in accordance with another exemplary embodiment.
Fig. 4 is a flowchart illustrating a method of determining whether an air conditioner satisfies a fluorine deficiency detection condition according to an exemplary embodiment.
Fig. 5 is a block diagram illustrating an air conditioner fluorine deficiency detecting apparatus according to an exemplary embodiment.
Fig. 6 is a block diagram illustrating an apparatus for fluorine deficiency detection in an air conditioner according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
It should be noted that all actions of acquiring signals, information or data in the present application are performed under the premise of complying with the corresponding data protection regulation policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.
In the related art, it is generally determined whether the air conditioner runs short of fluorine by the difference between the temperature of the coil of the heat exchanger of the air conditioner and the temperature of the indoor environment, and this determination method has some problems, which will be exemplified below. Firstly, the requirement for the arrangement position of a sensor for monitoring the temperature of a coil pipe of a heat exchanger is high, and because the fluorine-deficient protection and the too low or too high protection of the refrigerant pressure are both considered, the requirement is often difficult to meet by a single temperature sensor. Secondly, under some operating modes, for example refrigeration low-load operating mode, indoor outer temperature all is less than 20 degrees centigrade when refrigerating promptly, for example again heats super low temperature operating mode, and outdoor temperature is less than-15 degrees centigrade promptly, even do not lack fluorine operation, the difference between heat exchanger coil temperature and the indoor ambient temperature is also lower, triggers easily and lacks fluorine false alarm. Thirdly, when the sensor for monitoring the temperature of the heat exchanger coil pipe drops or the resistance value drifts, the false alarm of fluorine deficiency is easily triggered. Therefore, the mode for judging whether the air conditioner is lack of fluorine in the related technology has a small application range, can effectively judge whether the air conditioner is lack of fluorine only under specific environment temperature, has poor timeliness of fluorine deficiency judgment, can carry out fluorine deficiency reminding when the fluorine deficiency amount reaches more than 50% of the total refrigerant amount, is not accurate enough, and is easy to trigger fluorine deficiency false alarm.
In view of this, the present disclosure provides a method, an apparatus, a medium and a chip for detecting fluorine deficiency in an air conditioner, so as to improve the accuracy of detecting fluorine deficiency in an air conditioner.
Fig. 1 is a flowchart illustrating a fluorine deficiency detection method for an air conditioner according to an exemplary embodiment, which may be applied to a processor of the air conditioner, and as shown in fig. 1, the method may include S101 to S103.
In S101, if it is determined that the air conditioner satisfies the fluorine deficiency detection condition, the compressor operation frequency of the air conditioner is controlled to be maintained.
The processor can acquire information such as the temperature of an indoor heat exchanger coil, the indoor environment temperature, the running frequency of the compressor and the like in real time in the running process of the air conditioner, can determine whether the air conditioner currently meets the fluorine deficiency detection condition or not according to the information, and can control the running frequency of the compressor to keep unchanged when the air conditioner is determined to meet the fluorine deficiency detection condition.
In S102, the electronic expansion valve opening of the air conditioner is controlled while the compressor operation frequency is kept unchanged, and the compressor discharge temperatures are respectively obtained when the electronic expansion valve opening is controlled to different opening degrees.
In S103, it is determined whether the air conditioner is operated in the absence of fluorine, based on the compressor discharge temperature.
Wherein, the compressor exhaust temperature is the temperature at the compressor outlet position, and the compressor outlet position can be provided with a temperature sensor for detecting the compressor exhaust temperature and sending the detected temperature to the processor.
In the related art, when detecting whether the air conditioner is lack of fluorine, a continuous passive observation mode is generally adopted, namely the air conditioner is always in a closed-loop control mode, and the air conditioner always carries out the automatic adjustment of the frequency of a compressor and the opening of an electronic expansion valve according to the self running condition. In the method, when the air conditioner is determined to meet the fluorine deficiency detection condition, the processor actively controls the running frequency of the compressor and the opening degree of the electronic expansion valve, so that the running frequency of the compressor and the opening degree of the electronic expansion valve enter an open-loop control mode, and therefore after the opening degree of the electronic expansion valve is changed, the exhaust temperature of the compressor under the condition of different opening degrees can be used for judging whether the air conditioner is fluorine deficiency, the timeliness of fluorine deficiency judgment is better, and false alarm of fluorine deficiency is not easy to trigger.
Through the technical scheme, if the air conditioner is determined to meet the fluorine deficiency detection condition, the operation frequency of the compressor of the air conditioner is controlled to be kept unchanged, the opening of the electronic expansion valve of the air conditioner is controlled under the condition that the operation frequency of the compressor is kept unchanged, the exhaust temperature of the compressor under the condition that the opening of the electronic expansion valve is controlled to be different openings is obtained respectively, and whether the air conditioner runs in the absence of fluorine is determined according to the exhaust temperature of the compressor. Therefore, when the air conditioner is determined to meet the fluorine deficiency detection condition, the operation frequency of the compressor and the opening degree of the electronic expansion valve are actively controlled, so that the operation frequency of the compressor and the opening degree of the electronic expansion valve enter an open-loop control mode, whether the air conditioner runs in the absence of fluorine can be judged by changing the opening degree of the electronic expansion valve and the exhaust temperature of the compressor under the condition of different opening degrees under the condition that the operation frequency of the compressor is unchanged, the timeliness of fluorine deficiency judgment is better, and a false fluorine deficiency alarm is not easy to trigger.
Fig. 2 is a flowchart illustrating an air conditioner fluorine deficiency detection method according to another exemplary embodiment, and as shown in fig. 2, S102 may include S202 to S204, and S103 may include S205.
In S201, if it is determined that the air conditioner satisfies the fluorine deficiency detection condition, the compressor operation frequency of the air conditioner is controlled to be maintained. The implementation of step S201 may be as in S101.
In S202, the opening degree of the electronic expansion valve is controlled to be maintained at the current opening degree while the compressor operation frequency is maintained.
The current opening may be an opening of the electronic expansion valve when it is determined that the air conditioner satisfies the fluorine deficiency detection condition.
In S203, when a duration in which the opening degree of the electronic expansion valve is maintained as the current opening degree reaches a first preset duration, an exhaust temperature of the first compressor is acquired, and the opening degree of the electronic expansion valve is controlled to be adjusted to a maximum opening degree.
The first preset time period can be preset, the value of the first preset time period is not limited by the disclosure, taking the first preset time period as 3 minutes as an example, after the time period for controlling the opening degree of the electronic expansion valve to be maintained at the current opening degree reaches 3 minutes, the exhaust temperature of the compressor at the moment is obtained and used as the exhaust temperature of the first compressor, and the opening degree of the electronic expansion valve is controlled to be adjusted to the maximum opening degree, wherein the maximum opening degree is 480p for example.
In S204, the second compressor discharge air temperature is acquired when the time period during which the opening degree of the electronic expansion valve is maintained at the maximum opening degree reaches a second preset time period.
The second preset time period can also be preset, taking the first preset time period as 3 minutes and the second preset time period as 7 minutes as examples, after the time period for controlling the opening degree of the electronic expansion valve to be maintained at the maximum opening degree reaches 7 minutes, the exhaust temperature of the compressor at the moment is obtained and used as the exhaust temperature of the second compressor, and the distance at the moment is determined that the air conditioner meets the fluorine deficiency detection condition for 10 minutes in total.
In S205, it is determined whether the air conditioner is operated in a fluorine-deficient state according to the first compressor discharge temperature, the second compressor discharge temperature, the current opening, the maximum opening, and the compressor operation frequency.
The implementation of step S205 can be as shown in fig. 3, and includes steps S2051 to S2053.
In S2051, a frequency correction coefficient is determined based on the compressor operating frequency and the compressor characteristic coefficient.
The compressor characteristic coefficient is related to the compressor displacement, and it can be confirmed according to experiments that, taking the compressor characteristic coefficients as 48 and 80 as examples, the frequency correction coefficient λ may be calculated in the following manner:
λ＝(F’+48/80)
wherein F' is the compressor operating frequency.
In S2052, the fluorine deficiency characteristic information is determined based on the first compressor discharge temperature, the second compressor discharge temperature, the frequency correction coefficient, the current opening degree, and the maximum opening degree.
For example, the fluorine deficiency characteristic information may be determined by the following formula:
α＝(T exhaust _1 -T Exhaust _2 )+λ(P max -P 1 )/10
Wherein, alpha represents fluorine deficiency characteristic information, T Exhaust _1 Indicating first compressor discharge temperature, T Exhaust gas-2 Denotes the second compressor discharge temperature, lambda denotes the frequency correction factor, P 1 Indicates the current opening degree, P max Indicating the maximum opening.
In S2053, it is determined that the air conditioner is operating in the absence of fluorine if the fluorine-deficient characteristic information is less than or equal to the preset threshold.
The preset threshold value can be preset according to tests, and the preset threshold value is related to the air conditioner operation mode, for example, the preset threshold value of the air conditioner in the refrigeration mode is set to be 2, if the fluorine-deficient characteristic information alpha of the air conditioner is less than or equal to 2, the air conditioner can be determined to be operated in the absence of fluorine, and if the fluorine-deficient characteristic information is greater than the preset threshold value, the air conditioner can be determined to be operated in the absence of fluorine, namely, the air conditioner can be operated normally.
Through the scheme, under the condition that the running frequency of the compressor is controlled to be unchanged, the opening degree of the electronic expansion valve is controlled to be maintained at the current opening degree, the exhaust temperature of the first compressor is obtained after the first preset time, then the opening degree of the electronic expansion valve is controlled to be adjusted to the maximum opening degree, the exhaust temperature of the second compressor is obtained after the second preset time, therefore, the exhaust temperature of the compressor under the condition of different opening degrees is controlled according to the opening degree of the electronic expansion valve, whether the air conditioner runs lack of fluorine can be accurately judged, the timeliness is better, and false alarm of lack of fluorine is not easy to trigger.
Fig. 4 is a flowchart illustrating a method of determining whether an air conditioner satisfies a fluorine deficiency detection condition according to an exemplary embodiment, and as shown in fig. 4, the method of detecting fluorine deficiency in an air conditioner provided by the present disclosure may further include S401 to S403 before controlling an operation frequency of a compressor of the air conditioner to remain unchanged.
In S401, the startup operation time period of the air conditioner is acquired.
In S402, when the startup operation duration reaches a third preset duration, the current indoor environment temperature, the current indoor heat exchanger coil temperature of the air conditioner, and the current compressor operation frequency of the air conditioner are obtained in real time.
In S403, if it is determined that the duration that continuously meets the preset condition reaches a fourth preset duration according to the current indoor environment temperature, the current indoor heat exchanger coil temperature, and the current compressor operating frequency, it is determined that the air conditioner meets the fluorine deficiency detection condition.
For example, the preset conditions may include:
the absolute value of the difference between the current indoor heat exchanger coil temperature and the current indoor environment temperature is smaller than a specified temperature difference threshold; and the number of the first and second electrodes,
the current compressor operating frequency is greater than or equal to a preset frequency threshold.
Wherein the third preset time period may be preset, for example, set to 15 minutes. After the starting operation time of the air conditioner is longer than or equal to 15 minutes, the current indoor environment temperature T _ indor, the current indoor heat exchanger coil temperature T _ tube _ in of the air conditioner and the current compressor operation frequency F of the air conditioner can be obtained in real time.
The fourth preset time period is set to, for example, 1 minute, and the preset frequency threshold is set to, for example, 16HZ, and if (a) and (b) are simultaneously satisfied for 1 minute in succession, it is determined that the air conditioner satisfies the fluorine deficiency detection condition.
(a) The | T _ tube _ in-T _ indor | < T _ threshold, where T _ threshold is a specified temperature difference threshold.
(b)F≥16HZ
In the present disclosure, the specified temperature difference threshold may be a non-fixed value, and for example, the specified temperature difference threshold is determined according to a preset correspondence between the compressor frequency and the temperature difference threshold and the current compressor operating frequency, that is, the specified temperature difference threshold may be changed according to the current compressor operating frequency. The correspondence between the compressor frequency and the temperature difference threshold value may be set in advance, and an example of the correspondence is shown in table 1 below.
TABLE 1
| Compressor frequency | Threshold value of temperature difference |
| 26HZ＞F≥16HZ | At 3 deg.C |
| 40HZ＞F≥26HZ | 4 degree centigrade |
| F≥40HZ | 5 degree centigrade |
For example, the specified temperature difference threshold may be 3 degrees celsius if the current compressor operating frequency is 20HZ, and 4 degrees celsius if the current compressor operating frequency is 30 HZ.
Through the scheme, the designated temperature difference threshold value can be determined according to the current compressor running frequency, and the designated temperature difference threshold values corresponding to different compressor running frequencies can be different, so that the designated temperature difference threshold value is selected to be adaptive to the current compressor running frequency, and the judgment on whether the air conditioner meets the fluorine deficiency detection condition is more accurate.
It should be noted that, for each threshold related to the present disclosure, such as a first preset duration, a second preset duration, a preset frequency threshold, and the like, all of which may be preset, and values of the thresholds are not limited, the example in the above description is only an illustration, and does not limit the implementation.
Based on the same inventive concept, the present disclosure further provides an air conditioner fluorine deficiency detection apparatus, which executes the detection method provided by any embodiment of the present disclosure, and fig. 5 is a block diagram of the air conditioner fluorine deficiency detection apparatus according to an exemplary embodiment, as shown in fig. 5, the apparatus 500 may include:
the control module 501 is configured to control the operation frequency of a compressor of the air conditioner to remain unchanged if it is determined that the air conditioner meets the fluorine deficiency detection condition;
a first obtaining module 502, configured to control an opening of an electronic expansion valve of the air conditioner when an operating frequency of the compressor remains unchanged, and obtain exhaust temperatures of the compressor when the opening of the electronic expansion valve is controlled to different openings, respectively;
a first determining module 503, configured to determine whether the air conditioner runs short of fluorine according to the compressor discharge temperature.
By adopting the device, if the air conditioner is determined to meet the fluorine deficiency detection condition, the operation frequency of the compressor of the air conditioner is controlled to be kept unchanged, the opening of the electronic expansion valve of the air conditioner is controlled under the condition that the operation frequency of the compressor is kept unchanged, the exhaust temperature of the compressor under the condition that the opening of the electronic expansion valve is controlled to be different openings is respectively obtained, and whether the air conditioner runs in the absence of fluorine is determined according to the exhaust temperature of the compressor. Therefore, when the air conditioner is determined to meet the fluorine deficiency detection condition, the operation frequency of the compressor and the opening degree of the electronic expansion valve are actively controlled, so that the operation frequency of the compressor and the opening degree of the electronic expansion valve enter an open-loop control mode, whether the air conditioner runs in the absence of fluorine can be judged by changing the opening degree of the electronic expansion valve and the exhaust temperature of the compressor under the condition of different opening degrees under the condition that the operation frequency of the compressor is unchanged, the timeliness of fluorine deficiency judgment is better, and a false fluorine deficiency alarm is not easy to trigger.
Optionally, the first obtaining module 502 includes:
the control submodule is used for controlling the opening degree of the electronic expansion valve to be maintained at the current opening degree;
the first obtaining sub-module is used for obtaining the exhaust temperature of the first compressor under the condition that the time length for maintaining the opening degree of the electronic expansion valve to be the current opening degree reaches a first preset time length, and controlling the opening degree of the electronic expansion valve to be adjusted to the maximum opening degree;
the second obtaining submodule is used for obtaining the exhaust temperature of a second compressor when the time for maintaining the opening degree of the electronic expansion valve to be the maximum opening degree reaches a second preset time;
the first determining module 503 includes:
and the first determining submodule is used for determining whether the air conditioner runs in a fluorine-deficient mode or not according to the first compressor exhaust temperature, the second compressor exhaust temperature, the current opening degree, the maximum opening degree and the compressor running frequency.
Optionally, the first determining submodule includes:
the second determining submodule is used for determining a frequency correction coefficient according to the running frequency of the compressor and the characteristic coefficient of the compressor;
the third determining submodule is used for determining the fluorine-lacking characteristic information according to the first compressor exhaust temperature, the second compressor exhaust temperature, the frequency correction coefficient, the current opening and the maximum opening;
and the fourth determining submodule is used for determining that the air conditioner runs in the absence of fluorine under the condition that the characteristic information of the absence of fluorine is less than or equal to a preset threshold value.
Optionally, the third determining sub-module is configured to:
determining the fluorine deficiency characteristic information by the following formula:
α＝(T exhaust gas 1 -T Exhaust gas-2 )+λ(P max -P 1 )/10
Wherein, alpha represents fluorine deficiency characteristic information, T Exhaust _1 Indicating first compressor discharge temperature, T Exhaust _2 Denotes the second compressor discharge temperature, lambda denotes the frequency correction factor, P 1 Indicates the current opening degree, P max Indicating the maximum opening.
Optionally, the method further comprises:
the second acquisition module is used for acquiring the starting operation time of the air conditioner before the control module controls the operation frequency of the compressor of the air conditioner to be kept unchanged;
the third obtaining module is used for obtaining the current indoor environment temperature, the current indoor heat exchanger coil temperature of the air conditioner and the current compressor operation frequency of the air conditioner in real time under the condition that the starting operation time length reaches a third preset time length;
and the second determining module is used for determining that the air conditioner meets the fluorine lack detection condition if the duration continuously meeting the preset condition reaches a fourth preset duration according to the current indoor environment temperature, the current indoor heat exchanger coil temperature and the current compressor running frequency.
Optionally, the preset condition includes:
the absolute value of the difference between the current indoor heat exchanger coil temperature and the current indoor environment temperature is less than a specified temperature difference threshold; and the number of the first and second electrodes,
the current compressor operating frequency is greater than or equal to a preset frequency threshold.
Optionally, the specified temperature difference threshold is determined according to a preset correspondence between the compressor frequency and the temperature difference threshold, and the current compressor operating frequency.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The present disclosure also provides a computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the air conditioner fluorine deficiency detection method provided by the present disclosure.
Fig. 6 is a block diagram illustrating an apparatus 1900 for fluorine deficiency detection in an air conditioner according to an exemplary embodiment. For example, the apparatus 1900 may be provided as a processing apparatus. Referring to FIG. 6, the device 1900 includes a processing component 1922 further including one or more processors and memory resources, represented by memory 1932, for storing instructions, e.g., applications, executable by the processing component 1922. The application programs stored in memory 1932 may include one or more modules that each correspond to a set of instructions. Further, the processing component 1922 is configured to execute instructions to perform the air conditioner fluorine deficiency detection method described above.
The device 1900 may also include a power component 1926 configured to perform power management of the device 1900, a wired or wireless network interface 1950 configured to connect the device 1900 to a network, and an input/output interface 1958. The device 1900 may operate based on an operating system, such as Windows Server, stored in memory 1932 TM ，Mac OS X TM ，Unix TM ，Linux TM ，FreeBSD TM Or the like.
The apparatus may be a part of a stand-alone electronic device, for example, in an embodiment, the apparatus may be an Integrated Circuit (IC) or a chip, where the IC may be one IC or a collection of multiple ICs; the chip may include, but is not limited to, the following categories: a GPU (Graphics Processing Unit), a CPU (Central Processing Unit), an FPGA (Field Programmable Gate Array), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an SOC (System on Chip, SOC, System on Chip, or System on Chip), and the like. The integrated circuit or the chip can be used for executing executable instructions (or codes) to realize the air conditioner fluorine deficiency detection method. Where the executable instructions may be stored in the integrated circuit or chip or may be retrieved from another device or apparatus, for example, where the integrated circuit or chip includes a processor, a memory, and an interface for communicating with other devices. The executable instructions can be stored in the memory, and when the executable instructions are executed by the processor, the air conditioner fluorine deficiency detection method is realized; or, the integrated circuit or chip may receive the executable instruction through the interface and transmit the executable instruction to the processor for execution, so as to implement the air conditioner fluorine deficiency detection method.
In another exemplary embodiment, there is also provided a computer program product comprising a computer program executable by a programmable apparatus, the computer program having code portions for performing the air conditioner fluorine deficiency detection method described above when executed by the programmable apparatus.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (11)
1. An air conditioner fluorine deficiency detection method is characterized by comprising the following steps:
if the air conditioner is determined to meet the fluorine lack detection condition, controlling the running frequency of a compressor of the air conditioner to be kept unchanged;
under the condition that the running frequency of the compressor is not changed, controlling the opening of an electronic expansion valve of the air conditioner, and respectively acquiring the exhaust temperature of the compressor under the condition that the opening of the electronic expansion valve is controlled to be different;
and determining whether the air conditioner runs in a fluorine-deficient mode or not according to the exhaust temperature of the compressor.
2. The method according to claim 1, wherein the controlling the opening degree of the electronic expansion valve of the air conditioner and respectively acquiring the discharge temperature of the compressor when the opening degree of the electronic expansion valve is controlled to be different opening degrees comprises:
controlling the opening degree of the electronic expansion valve to be maintained as the current opening degree;
under the condition that the time length for maintaining the opening degree of the electronic expansion valve to be the current opening degree reaches a first preset time length, acquiring the exhaust temperature of a first compressor, and controlling the opening degree of the electronic expansion valve to be adjusted to the maximum opening degree;
acquiring the exhaust temperature of a second compressor when the opening degree of the electronic expansion valve is maintained as the maximum opening degree and the time length reaches a second preset time length;
the determining whether the air conditioner runs short of fluorine or not according to the exhaust temperature of the compressor comprises the following steps:
and determining whether the air conditioner runs in a fluorine-deficient mode or not according to the first compressor exhaust temperature, the second compressor exhaust temperature, the current opening, the maximum opening and the compressor running frequency.
3. The method of claim 2, wherein said determining whether said air conditioner is operating lean of fluorine based on said first compressor discharge temperature, said second compressor discharge temperature, said current opening, said maximum opening, said compressor operating frequency comprises:
determining a frequency correction coefficient according to the running frequency of the compressor and the characteristic coefficient of the compressor;
determining fluorine-lacking characteristic information according to the first compressor exhaust temperature, the second compressor exhaust temperature, the frequency correction coefficient, the current opening and the maximum opening;
and determining that the air conditioner runs in the absence of fluorine under the condition that the fluorine-lacking characteristic information is less than or equal to a preset threshold value.
4. The method of claim 3, wherein said determining fluorine deficiency characterization information based on the first compressor discharge temperature, the second compressor discharge temperature, the frequency correction factor, the current opening, the maximum opening comprises:
determining the fluorine deficiency characteristic information by the following formula:
α＝(T exhaust _1 -T Exhaust gas-2 )+λ(P max -P 1 )/10
Wherein, alpha represents fluorine deficiency characteristic information, T Exhaust _1 Representing a first compressionTemperature of engine exhaust, T Exhaust _2 Denotes the second compressor discharge temperature, lambda denotes the frequency correction factor, P 1 Indicates the current opening degree, P max Indicating the maximum opening.
5. The method of claim 1, before controlling the compressor operation frequency of the air conditioner to remain unchanged, further comprising:
acquiring the starting operation time of the air conditioner;
under the condition that the starting operation time length reaches a third preset time length, acquiring the current indoor environment temperature, the current indoor heat exchanger coil temperature of the air conditioner and the current compressor operation frequency of the air conditioner in real time;
and if the duration of continuously meeting the preset condition reaches a fourth preset duration according to the current indoor environment temperature, the current indoor heat exchanger coil temperature and the current compressor running frequency, determining that the air conditioner meets the fluorine lack detection condition.
6. The method according to claim 5, wherein the preset conditions include:
the absolute value of the difference between the current indoor heat exchanger coil temperature and the current indoor environment temperature is less than a specified temperature difference threshold; and the number of the first and second electrodes,
the current compressor operating frequency is greater than or equal to a preset frequency threshold.
7. The method of claim 6, wherein the specified temperature difference threshold is determined based on a correspondence between a preset compressor frequency and a temperature difference threshold, and the current compressor operating frequency.
8. An air conditioner fluorine deficiency detection device, characterized in that, the detection method of any one of claims 1-7 is executed, comprising:
the control module is used for controlling the running frequency of a compressor of the air conditioner to be kept unchanged if the air conditioner is determined to meet the fluorine deficiency detection condition;
the first acquisition module is used for controlling the opening of an electronic expansion valve of the air conditioner under the condition that the running frequency of the compressor is kept unchanged, and respectively acquiring the exhaust temperature of the compressor under the condition that the opening of the electronic expansion valve is controlled to be different;
the first determination module is used for determining whether the air conditioner runs in a fluorine-deficient mode or not according to the exhaust temperature of the compressor.
9. An air conditioner lack of fluorine detection device which characterized in that includes:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to: the steps of the method of any one of claims 1 to 7 are performed.
10. A computer-readable storage medium, on which computer program instructions are stored, which program instructions, when executed by a processor, carry out the steps of the method according to any one of claims 1 to 7.
11. A chip comprising a processor and an interface; the processor is configured to read instructions to perform the method of any of claims 1 to 7.
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