CN105674507A - Method and device for detecting refrigerants of air conditioner - Google Patents
Method and device for detecting refrigerants of air conditioner Download PDFInfo
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- CN105674507A CN105674507A CN201610128131.7A CN201610128131A CN105674507A CN 105674507 A CN105674507 A CN 105674507A CN 201610128131 A CN201610128131 A CN 201610128131A CN 105674507 A CN105674507 A CN 105674507A
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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
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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
- F24F2110/00—Control inputs relating to air properties
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a method for detecting refrigerants of an air conditioner. The method comprises the steps of judging whether a compressor is started when the air conditioner carries out refrigeration or dehumidification; when the compressor is started, after the compressor is continuously operated for the first preset time, obtaining the air inlet temperature of the air conditioner and the temperature of an indoor heat exchanger, calculating the difference value between the air inlet temperature of the air conditioner and the temperature of the indoor heat exchanger and setting the difference value as the first temperature difference; when the first temperature difference is smaller than the first preset value, after the compressor is continuously operated for the second preset time, obtaining the air inlet temperature of the air conditioner and the temperature of the indoor heat exchanger, calculating the difference value between the air inlet temperature of the air conditioner and the temperature of the indoor heat exchanger and setting the difference value as the second temperature difference; when the second temperature difference is smaller than the second preset value, judging whether the absolute value of the difference value between the first temperature difference and the second temperature difference is smaller than the third preset value; if the absolute value of the difference value between the first temperature difference and the second temperature difference is smaller than the third preset value, judging that the refrigerant malfunction exists. The invention further discloses a device for detecting the refrigerants of the air conditioner. According to the method and device, leakage detection of the refrigerants is realized, and the operation reliability of the air conditioner is improved.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to air conditioner coolant detection method and device.
Background technology
Existing air-conditioning refrigeration system includes compressor, outdoor heat exchanger, throttling arrangement, indoor heat exchanger and is pre-charged with a certain amount of coolant. When coolant does not leak, air conditioning system can normal refrigerating operaton. When if air-conditioning installation is lack of standardization or the later stage is run, owing to the reasons such as vibration cause system pipeline to occur, coolant slowly leaks for a long time, and the refrigeration of air conditioning system will be deteriorated. When coolant leakage is serious, often burn compressor, thus affecting the reliability of operation of air conditioner.
Summary of the invention
Present invention is primarily targeted at a kind of air conditioner coolant detection method of offer and device, it is intended to realize coolant leakage detection, improve the reliability of operation of air conditioner.
For achieving the above object, a kind of air conditioner coolant detection method provided by the invention comprises the following steps:
When air-conditioner refrigeration or dehumidifying are run, it is judged that whether compressor starts;
When compressor start, after compressor continuous service the first preset time, obtain air-conditioning inlet temperature and indoor heat exchanger temperature, and calculate the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, be set as first temperature difference;
When described first temperature difference is less than the first preset value, after compressor continuous service the second preset time, obtain air-conditioning inlet temperature and indoor heat exchanger temperature, and calculate the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, be set as second temperature difference;
When described second temperature difference is less than the second preset value, it is judged that whether the absolute value of the difference between first temperature difference and second temperature difference is less than the 3rd preset value;
If, it is determined that coolant fault.
Preferably, described determine coolant fault before also include:
Record the absolute value number of times less than the 3rd preset value of difference between first temperature difference and second temperature difference;
When the number of times of record is be more than or equal to first threshold, it is determined that coolant fault;
When the number of times of record is less than described first threshold, after controlling described compressor shutdown the 3rd preset time, it is again started up.
Preferably, after described control described compressor shutdown the 3rd preset time, also include after being again started up:
When the number of times of record is Second Threshold, controls the indoor fan of described air-conditioner and be reduced to after preset windscreen runs the 4th preset time by the initial wind-speed gear currently set, be again restored to described initial wind-speed gear.
Preferably, described determine coolant fault after also include:
According to described coolant Fault Control, air-conditioner is shut down, and shows coolant fault message.
Preferably, described determine coolant fault after also include:
The mobile terminal that corresponding information is extremely preset is exported according to described coolant fault.
Additionally, for achieving the above object, the present invention also provides for a kind of air conditioner coolant detecting device, and described air conditioner coolant detecting device includes:
First judge module, for when air-conditioner refrigeration or dehumidifying are run, it is judged that whether compressor starts;
First acquisition module, for when compressor start, after compressor continuous service the first preset time, obtains air-conditioning inlet temperature and indoor heat exchanger temperature, and calculates the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, be set as first temperature difference;
Second acquisition module, for when described first temperature difference is less than the first preset value, after compressor continuous service the second preset time, obtain air-conditioning inlet temperature and indoor heat exchanger temperature, and calculate the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, it is set as second temperature difference;
Second judge module, for when described second temperature difference is less than the second preset value, it is judged that whether the absolute value of the difference between first temperature difference and second temperature difference is less than the 3rd preset value;
Determine module, when the absolute value of the difference being used between first temperature difference and second temperature difference is less than three preset values, it is determined that coolant fault.
Preferably, described air conditioner coolant detecting device also includes:
Logging modle, for recording the absolute value number of times less than the 3rd preset value of the difference between first temperature difference and second temperature difference; When the number of times of record is be more than or equal to first threshold, triggers and described determine that module determines coolant fault;
First controls module, for when the number of times of record is less than described first threshold, after controlling described compressor shutdown the 3rd preset time, being again started up.
Preferably, described air conditioner coolant detecting device also includes:
Second controls module, for when the number of times of record is Second Threshold, controls the indoor fan of described air-conditioner and is reduced to after preset windscreen runs the 4th preset time by the initial wind-speed gear currently set, be again restored to described initial wind-speed gear.
Preferably, described air conditioner coolant detecting device also includes:
Processing module, shuts down for air-conditioner according to described coolant Fault Control, and shows coolant fault message.
Preferably, described processing module is additionally operable to export, according to described coolant fault, the mobile terminal that corresponding information is extremely preset.
The embodiment of the present invention is by detecting air-conditioning inlet temperature and indoor heat exchanger temperature, and determine whether coolant leaks according to the situation of change of difference between air-conditioning inlet temperature and indoor heat exchanger temperature, it is achieved thereby that coolant leakage detection, improve the reliability of operation of air conditioner.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of air conditioner coolant detection method first embodiment of the present invention;
Fig. 2 is the schematic flow sheet of air conditioner coolant detection method the second embodiment of the present invention;
Fig. 3 is the schematic flow sheet of air conditioner coolant detection method the 3rd embodiment of the present invention;
Fig. 4 is the high-level schematic functional block diagram of air conditioner coolant detecting device first embodiment of the present invention;
Fig. 5 is the high-level schematic functional block diagram of air conditioner coolant detecting device the second embodiment of the present invention;
Fig. 6 is the high-level schematic functional block diagram of air conditioner coolant detecting device the 3rd embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
The present invention provides a kind of air conditioner coolant detection method, and with reference to Fig. 1, in one embodiment, this air conditioner coolant detection method includes:
Step S10, when air-conditioner refrigeration or dehumidifying are run, it is judged that whether compressor starts;
Air conditioner coolant detection method provided by the invention is mainly used in air conditioning system, for whether the coolant in air conditioning system is leaked detects, to guarantee the properly functioning of air-conditioner.
Specifically, whether detection coolant leaks, and when mainly operating in refrigeration or dehumidification mode at air-conditioner, the coolant quantity of system circulation is detected, to judge whether coolant lacks. In the present embodiment mainly through after compressor operating a period of time, the difference size between temperature and the indoor heat exchanger temperature of the air inlet of detection indoor apparatus of air conditioner determines the state of coolant. First can pass through to obtain the duty of compressor, to judge whether compressor starts.
Step S20, when compressor start, after compressor continuous service the first preset time, obtains air-conditioning inlet temperature and indoor heat exchanger temperature, and calculates the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, be set as first temperature difference;
Step S30, when described first temperature difference is less than the first preset value, after compressor continuous service the second preset time, obtain air-conditioning inlet temperature and indoor heat exchanger temperature, and calculate the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, it is set as second temperature difference;
Step S40, when described second temperature difference is less than the second preset value, it is judged that whether the absolute value of the difference between first temperature difference and second temperature difference is less than the 3rd preset value; If then performing step S50, otherwise terminate.
Step S50, it is determined that coolant fault.
In the present embodiment, it is possible to by arranging temperature sensor detection air-conditioning inlet temperature in the air inlet of indoor set, it is possible to obtain the temperature value of temperature-sensitive bag detection preset on the coil pipe of indoor heat exchanger, thus obtaining indoor heat exchanger temperature.
The time span of above-mentioned first preset time and the second Preset Time can be configured according to actual needs, in the present embodiment, first preset time, below will with the first preset time for 2 minutes less than the second preset time, and the second preset time is be described in detail for example for 3 minutes. The size of above-mentioned first preset value and the second preset value all can be configured according to actual needs, is 10 DEG C with the first preset value and the second preset value and makes detailed description in following embodiment. Above-mentioned 3rd size pre-seted can be configured according to actual needs, is described in detail for the 3rd preset value for 1 DEG C in following embodiment.
Specifically, in the present embodiment, in air-conditioner refrigeration or dehumidification operating mode, start timing when compressor start, and judge whether the time of compressor continuous service reaches 2 minutes. When the time of compressor continuous service reaches 2 minutes, obtaining air-conditioning inlet temperature T1 and indoor heat exchanger temperature T2, the difference then calculating both obtains the first temperature difference t1, Δ t1=T1-T2.Then judge that whether the first temperature difference t1 is less than 10 DEG C, if so, then when the compressor continuous working period reaches 3 minutes, air-conditioning inlet temperature T3 and indoor heat exchanger temperature T4 is again obtained, then the difference calculating both obtains the first temperature difference t2, Δ t2=T3-T4. Then judge that whether the first temperature difference t2 is less than 10 DEG C, if so, then judge that whether | Δ t1-Δ t2 | is less than 1 DEG C. If, it is determined that the coolant leakage of air conditioning system.
It is understandable that, difference size according to air-conditioning inlet temperature and indoor heat exchanger temperature is determined whether air conditioner coolant leaks and is because: when coolant leakage makes the coolant quantity in air conditioning system reduce, thus causing that heat exchange efficiency reduces, such that it is able to the temperature conditions according to air-conditioning inlet temperature and indoor heat exchanger temperature determines whether system coolant lacks, and then may determine that whether coolant leaks.
The embodiment of the present invention is by detecting air-conditioning inlet temperature and indoor heat exchanger temperature, and determine whether coolant leaks according to the situation of change of difference between air-conditioning inlet temperature and indoor heat exchanger temperature, it is achieved thereby that coolant leakage detection, improve the reliability of operation of air conditioner.
Further, with reference to Fig. 2, it is provided that air conditioner coolant detection method the second embodiment of the present invention, based on air conditioner coolant detection method first embodiment of the present invention, in air conditioner coolant detection method the second embodiment, above-mentioned air conditioner coolant detection method also includes:
Step S60, records the absolute value number of times less than the 3rd preset value of difference between first temperature difference and second temperature difference;
Step S70, it is judged that whether the number of times of record, less than first threshold, if so, then performs step S80, otherwise perform step S50;
Step S80, after controlling described compressor shutdown the 3rd preset time, is again started up.
In the present embodiment, the absolute value recording the difference between first temperature difference and second temperature difference can be configured according to practical situation less than the counting mode of the number of times of the 3rd preset value. At this, preferably, can arranging a variable parameter for adding up the absolute value number of times less than the 3rd preset value of the difference between first temperature difference and second temperature difference, when calculating obtains the absolute value of the difference between first temperature difference and second temperature difference less than three preset values, this variable parameter adds one. The time span of above-mentioned 3rd preset time can be configured according to actual needs, in the present embodiment, it is preferable that the 3rd preset time can be 3 minutes. The size of above-mentioned first threshold can be configured according to actual needs, for instance in this embodiment, it is preferred that, this first threshold is 3. Namely, when the absolute value of the difference counted between first temperature difference and second temperature difference is 3 times less than the number of times of the 3rd preset value, the coolant leakage of air conditioning system is just determined.
In the present embodiment, owing to adding up the absolute value number of times less than the 3rd preset value of the difference between first temperature difference and second temperature difference, the accuracy judging coolant leakage can be improved, when continuous several times detects the absolute value of difference between first temperature difference and second temperature difference less than three preset values, then it can be assumed that the coolant leakage of air-conditioning.
Specifically, when above-mentioned variable parameter is again introduced into refrigeration or dehumidification mode at air-conditioning, it will reset clearing again.
Further, with reference to Fig. 3, it is provided that air conditioner coolant detection method the 3rd embodiment of the present invention, based on air conditioner coolant detection method the second embodiment of the present invention, in air conditioner coolant detection method the 3rd embodiment, also include after above-mentioned steps S80:
Step S90, when the number of times of record is Second Threshold, controls the indoor fan of described air-conditioner and is reduced to after preset windscreen runs the 4th preset time by the initial wind-speed gear currently set, be again restored to described initial wind-speed gear.
In the present embodiment, the size of above-mentioned Second Threshold can be configured according to actual needs, for instance, the present embodiment is described in detail for this Second Threshold for 2. The time span of above-mentioned 4th preset time can be configured according to actual needs, in the present embodiment, it is preferable that the 4th preset time is 5 minutes.
Specifically, when the absolute value of the difference counted between first temperature difference and second temperature difference is 2 times less than the number of times of the 3rd preset value, by reducing the rotating speed of indoor fan, thus increasing the difference between air-conditioning inlet temperature and indoor heat exchanger temperature further, and then improve the accuracy of detection.
It is understood that in the present embodiment, above-mentioned preset windscreen is the low wind shelves of indoor fan, if the initial wind-speed gear that currently sets of indoor fan as low wind shelves, then keeps windscreen constant. Run 5 minutes if the initial wind-speed gear that indoor fan currently sets as high wind shelves, is then first according to low wind shelves, then then return to adopt high wind shelves to run.
The air conditioner coolant detection method that the embodiment of the present invention provides is high to the detection sensitivity of coolant leakage in air-conditioner, can detect when being typically in air-conditioner coolant leakage about 30%. Under individual cases, can detect during coolant leakage about 20% in air-conditioner. Meanwhile, this detection method utilizes the temperature gap of air-conditioning inlet temperature that temperature sensor detects and indoor heat exchanger temperature to judge. Even if the detected value of temperature sensor has deviation, but the difference of the two sensor detected value does not have deviation, avoiding problems because the detection error of temperature sensor itself causes the erroneous judgement of coolant leakage.
It is understood that the mode for coolant troubleshooting can be configured according to actual needs. In this embodiment, it is preferred that, it is possible to according to described coolant Fault Control, air-conditioner is shut down, and shows coolant fault message. Owing to when coolant fault being detected, being automatically stopped operation of air conditioner, thus improve the reliability of operation of air conditioner. The mode of display coolant fault message can be configured according to actual needs, for instance can arrange LED light on the indoor unit panel of air-conditioner.
Additionally, in order to inform user in time, it is also possible to export, according to described coolant fault, the mobile terminal that corresponding information is extremely preset. This mobile terminal can be mobile phone, air-conditioning can pass through bluetooth and set up communication connection with mobile phone, wifi can also be passed through and set up communication connection with mobile phone, such that it is able to exported corresponding information to mobile phone by air-conditioning, to inform that user's air-conditioning exists coolant leakage phenomenon.
The present invention also provides for a kind of air conditioner coolant detecting device, and with reference to Fig. 4, in one embodiment, air conditioner coolant detecting device provided by the invention includes:
First judge module 10, for when air-conditioner refrigeration or dehumidifying are run, it is judged that whether compressor starts;
Air conditioner coolant detecting device provided by the invention is mainly used in air conditioning system, for whether the coolant in air conditioning system is leaked detects, to guarantee the properly functioning of air-conditioner.
Specifically, whether detection coolant leaks, and when mainly operating in refrigeration or dehumidification mode at air-conditioner, the coolant quantity of system circulation is detected, to judge whether coolant lacks. In the present embodiment mainly through after compressor operating a period of time, the difference size between temperature and the indoor heat exchanger temperature of the air inlet of detection indoor apparatus of air conditioner determines the state of coolant. First can pass through to obtain the duty of compressor, to judge whether compressor starts.
First acquisition module 20, for when compressor start, after compressor continuous service the first preset time, obtains air-conditioning inlet temperature and indoor heat exchanger temperature, and calculates the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, be set as first temperature difference;
Second acquisition module 30, for when described first temperature difference is less than the first preset value, after compressor continuous service the second preset time, obtain air-conditioning inlet temperature and indoor heat exchanger temperature, and calculate the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, it is set as second temperature difference;
Second judge module 40, for when described second temperature difference is less than the second preset value, it is judged that whether the absolute value of the difference between first temperature difference and second temperature difference is less than the 3rd preset value;
Determine module 50, when the absolute value of the difference being used between first temperature difference and second temperature difference is less than three preset values, it is determined that coolant fault.
In the present embodiment, it is possible to by arranging temperature sensor detection air-conditioning inlet temperature in the air inlet of indoor set, it is possible to obtain the temperature value of temperature-sensitive bag detection preset on the coil pipe of indoor heat exchanger, thus obtaining indoor heat exchanger temperature.
The time span of above-mentioned first preset time and the second Preset Time can be configured according to actual needs, in the present embodiment, first preset time, below will with the first preset time for 2 minutes less than the second preset time, and the second preset time is be described in detail for example for 3 minutes. The size of above-mentioned first preset value and the second preset value all can be configured according to actual needs, is 10 DEG C with the first preset value and the second preset value and makes detailed description in following embodiment. Above-mentioned 3rd size pre-seted can be configured according to actual needs, is described in detail for the 3rd preset value for 1 DEG C in following embodiment.
Specifically, in the present embodiment, in air-conditioner refrigeration or dehumidification operating mode, start timing when compressor start, and judge whether the time of compressor continuous service reaches 2 minutes. When the time of compressor continuous service reaches 2 minutes, obtaining air-conditioning inlet temperature T1 and indoor heat exchanger temperature T2, the difference then calculating both obtains the first temperature difference t1, Δ t1=T1-T2. Then judge that whether the first temperature difference t1 is less than 10 DEG C, if so, then when the compressor continuous working period reaches 3 minutes, air-conditioning inlet temperature T3 and indoor heat exchanger temperature T4 is again obtained, then the difference calculating both obtains the first temperature difference t2, Δ t2=T3-T4. Then judge that whether the first temperature difference t2 is less than 10 DEG C, if so, then judge that whether | Δ t1-Δ t2 | is less than 1 DEG C. If, it is determined that the coolant leakage of air conditioning system.
It is understandable that, difference size according to air-conditioning inlet temperature and indoor heat exchanger temperature is determined whether air conditioner coolant leaks and is because: when coolant leakage makes the coolant quantity in air conditioning system reduce, thus causing that heat exchange efficiency reduces, such that it is able to the temperature conditions according to air-conditioning inlet temperature and indoor heat exchanger temperature determines whether system coolant lacks, and then may determine that whether coolant leaks.
The embodiment of the present invention is by detecting air-conditioning inlet temperature and indoor heat exchanger temperature, and determine whether coolant leaks according to the situation of change of difference between air-conditioning inlet temperature and indoor heat exchanger temperature, it is achieved thereby that coolant leakage detection, improve the reliability of operation of air conditioner.
Further, with reference to Fig. 5, it is provided that air conditioner coolant detecting device the second embodiment of the present invention, based on air conditioner coolant detecting device first embodiment of the present invention, in air conditioner coolant detecting device the second embodiment, above-mentioned air conditioner coolant detecting device also includes:
Logging modle 60, for recording the absolute value number of times less than the 3rd preset value of the difference between first temperature difference and second temperature difference;When the number of times of record is be more than or equal to first threshold, triggers and described determine that module 50 determines coolant fault;
First controls module 70, for when the number of times of record is less than described first threshold, after controlling described compressor shutdown the 3rd preset time, being again started up.
In the present embodiment, the absolute value recording the difference between first temperature difference and second temperature difference can be configured according to practical situation less than the counting mode of the number of times of the 3rd preset value. At this, preferably, can arranging a variable parameter for adding up the absolute value number of times less than the 3rd preset value of the difference between first temperature difference and second temperature difference, when calculating obtains the absolute value of the difference between first temperature difference and second temperature difference less than three preset values, this variable parameter adds one. The time span of above-mentioned 3rd preset time can be configured according to actual needs, in the present embodiment, it is preferable that the 3rd preset time can be 3 minutes. The size of above-mentioned first threshold can be configured according to actual needs, for instance in this embodiment, it is preferred that, this first threshold is 3. Namely, when the absolute value of the difference counted between first temperature difference and second temperature difference is 3 times less than the number of times of the 3rd preset value, the coolant leakage of air conditioning system is just determined.
In the present embodiment, owing to adding up the absolute value number of times less than the 3rd preset value of the difference between first temperature difference and second temperature difference, the accuracy judging coolant leakage can be improved, when continuous several times detects the absolute value of difference between first temperature difference and second temperature difference less than three preset values, then it can be assumed that the coolant leakage of air-conditioning.
Specifically, when above-mentioned variable parameter is again introduced into refrigeration or dehumidification mode at air-conditioning, it will reset clearing again.
Further, with reference to Fig. 6, it is provided that air conditioner coolant detecting device the 3rd embodiment of the present invention, based on air conditioner coolant detecting device the second embodiment of the present invention, in air conditioner coolant detecting device the 3rd embodiment, this air conditioner coolant detecting device also includes:
Second controls module 80, for when the number of times of record is Second Threshold, controls the indoor fan of described air-conditioner and is reduced to after preset windscreen runs the 4th preset time by the initial wind-speed gear currently set, be again restored to described initial wind-speed gear.
In the present embodiment, the size of above-mentioned Second Threshold can be configured according to actual needs, for instance, the present embodiment is described in detail for this Second Threshold for 2. The time span of above-mentioned 4th preset time can be configured according to actual needs, in the present embodiment, it is preferable that the 4th preset time is 5 minutes.
Specifically, when the absolute value of the difference counted between first temperature difference and second temperature difference is 2 times less than the number of times of the 3rd preset value, by reducing the rotating speed of indoor fan, thus increasing the difference between air-conditioning inlet temperature and indoor heat exchanger temperature further, and then improve the accuracy of detection.
It is understood that in the present embodiment, above-mentioned preset windscreen is the low wind shelves of indoor fan, if the initial wind-speed gear that currently sets of indoor fan as low wind shelves, then keeps windscreen constant. Run 5 minutes if the initial wind-speed gear that indoor fan currently sets as high wind shelves, is then first according to low wind shelves, then then return to adopt high wind shelves to run.
The air conditioner coolant detection method that the embodiment of the present invention provides is high to the detection sensitivity of coolant leakage in air-conditioner, can detect when being typically in air-conditioner coolant leakage about 30%.Under individual cases, can detect during coolant leakage about 20% in air-conditioner. Meanwhile, this detection method utilizes the temperature gap of air-conditioning inlet temperature that temperature sensor detects and indoor heat exchanger temperature to judge. Even if the detected value of temperature sensor has deviation, but the difference of the two sensor detected value does not have deviation, avoiding problems because the detection error of temperature sensor itself causes the erroneous judgement of coolant leakage.
It is understood that the mode for coolant troubleshooting can be configured according to actual needs. In this embodiment, it is preferred that, above-mentioned air conditioner coolant detecting device also includes processing module, and this processing module can be shut down according to air-conditioner described in described coolant Fault Control, and shows coolant fault message. Owing to when coolant fault being detected, being automatically stopped operation of air conditioner, thus improve the reliability of operation of air conditioner. The mode of display coolant fault message can be configured according to actual needs, for instance can arrange LED light on the indoor unit panel of air-conditioner.
Additionally, in order to inform user in time, above-mentioned processing module can also export, according to described coolant fault, the mobile terminal that corresponding information is extremely preset. This mobile terminal can be mobile phone, air-conditioning can pass through bluetooth and set up communication connection with mobile phone, wifi can also be passed through and set up communication connection with mobile phone, such that it is able to exported corresponding information to mobile phone by air-conditioning, to inform that user's air-conditioning exists coolant leakage phenomenon.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (10)
1. an air conditioner coolant detection method, it is characterised in that described air conditioner coolant detection method comprises the following steps:
When air-conditioner refrigeration or dehumidifying are run, it is judged that whether compressor starts;
When compressor start, after compressor continuous service the first preset time, obtain air-conditioning inlet temperature and indoor heat exchanger temperature, and calculate the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, be set as first temperature difference;
When described first temperature difference is less than the first preset value, after compressor continuous service the second preset time, obtain air-conditioning inlet temperature and indoor heat exchanger temperature, and calculate the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, be set as second temperature difference;
When described second temperature difference is less than the second preset value, it is judged that whether the absolute value of the difference between first temperature difference and second temperature difference is less than the 3rd preset value;
If, it is determined that coolant fault.
2. air conditioner coolant detection method as claimed in claim 1, it is characterised in that described air conditioner coolant detection method also includes:
Record the absolute value number of times less than the 3rd preset value of difference between first temperature difference and second temperature difference;
When the number of times of record is be more than or equal to first threshold, it is determined that coolant fault;
When the number of times of record is less than described first threshold, it is again started up after controlling described compressor shutdown the 3rd preset time.
3. air conditioner coolant detection method as claimed in claim 2, it is characterised in that after described control described compressor shutdown the 3rd preset time, also include after being again started up:
When the number of times of record is Second Threshold, controls the indoor fan of described air-conditioner and be reduced to after preset windscreen runs the 4th preset time by the initial wind-speed gear currently set, be again restored to described initial wind-speed gear.
4. as claimed any one in claims 1 to 3 air conditioner coolant detection method, it is characterised in that described determine coolant fault after also include:
According to described coolant Fault Control, air-conditioner is shut down, and shows coolant fault message.
5. air conditioner coolant detection method as claimed in claim 4, it is characterised in that described determine coolant fault after also include:
The mobile terminal that corresponding information is extremely preset is exported according to described coolant fault.
6. an air conditioner coolant detecting device, it is characterised in that described air conditioner coolant detecting device includes:
First judge module, for when air-conditioner refrigeration or dehumidifying are run, it is judged that whether compressor starts;
First acquisition module, for when compressor start, after compressor continuous service the first preset time, obtains air-conditioning inlet temperature and indoor heat exchanger temperature, and calculates the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, be set as first temperature difference;
Second acquisition module, for when described first temperature difference is less than the first preset value, after compressor continuous service the second preset time, obtain air-conditioning inlet temperature and indoor heat exchanger temperature, and calculate the difference between air-conditioning inlet temperature and indoor heat exchanger temperature, it is set as second temperature difference;
Second judge module, for when described second temperature difference is less than the second preset value, it is judged that whether the absolute value of the difference between first temperature difference and second temperature difference is less than the 3rd preset value;
Determine module, when the absolute value of the difference being used between first temperature difference and second temperature difference is less than three preset values, it is determined that coolant fault.
7. air conditioner coolant detecting device as claimed in claim 6, it is characterised in that described air conditioner coolant detecting device also includes:
Logging modle, for recording the absolute value number of times less than the 3rd preset value of the difference between first temperature difference and second temperature difference; When the number of times of record is be more than or equal to first threshold, triggers and described determine that module determines coolant fault;
First controls module, for when the number of times of record is less than described first threshold, after controlling described compressor shutdown the 3rd preset time, being again started up.
8. air conditioner coolant detecting device as claimed in claim 7, it is characterised in that described air conditioner coolant detecting device also includes:
Second controls module, for when the number of times of record is Second Threshold, controls the indoor fan of described air-conditioner and is reduced to after preset windscreen runs the 4th preset time by the initial wind-speed gear currently set, be again restored to described initial wind-speed gear.
9. the air conditioner coolant detecting device as according to any one of claim 6 to 8, it is characterised in that described air conditioner coolant detecting device also includes:
Processing module, shuts down for air-conditioner according to described coolant Fault Control, and shows coolant fault message.
10. air conditioner coolant detecting device as claimed in claim 9, it is characterised in that described processing module is additionally operable to export, according to described coolant fault, the mobile terminal that corresponding information is extremely preset.
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