CN106895558B - The detection method and device of air-conditioner coolant leakage - Google Patents
The detection method and device of air-conditioner coolant leakage Download PDFInfo
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- CN106895558B CN106895558B CN201710095493.5A CN201710095493A CN106895558B CN 106895558 B CN106895558 B CN 106895558B CN 201710095493 A CN201710095493 A CN 201710095493A CN 106895558 B CN106895558 B CN 106895558B
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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
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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
- 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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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Abstract
The invention discloses a kind of detection method of air-conditioner coolant leakage, this method process includes: to obtain the first indoor environment temperature, the first coil temperature of indoor heat exchanger and the first exhaust temperature of compressor of air conditioner；When detecting that the temperature difference between first coil temperature and the first indoor environment temperature less than the first preset temperature, and when the first exhaust temperature is greater than the second preset temperature, determines that coolant leakage occurs for the air conditioner.The present invention also proposes a kind of detection device of air-conditioner coolant leakage.The present invention, which realizes, is monitored the operating condition of air conditioner, judges whether refrigerant leaks in time.
Description
Technical field
The present invention relates to the detection method and device that air conditioner technical field more particularly to a kind of air-conditioner coolant leak.
Background technique
Existing air-conditioning refrigeration system includes compressor, outdoor heat exchanger, throttling set, indoor heat exchanger and is pre-charged with
A certain amount of refrigerant.In the case where refrigerant does not leak, air-conditioning system can normal refrigerating operaton.If but air-conditioning installation is not
After specification or installation due to long-play generates vibration etc., it is easy to cause air-conditioning system pipeline refrigerant occur and delays for a long time
The case where slow leakage, refrigerant can be deteriorated if the refrigeration effect for leakage air-conditioning system occur, or even occur what compressor was burnt
Phenomenon.Therefore, it is necessary to detect for whether the refrigerant in air conditioner has occurred leakage.
Summary of the invention
The present invention provides a kind of detection method and device of air-conditioner coolant leakage, and main purpose is to air conditioner
Operating condition is monitored, and judges whether refrigerant leaks in time.
To achieve the above object, the present invention provides a kind of detection method of air-conditioner coolant leakage, which lets out
The detection method of leakage includes:
Obtain the first of the first indoor environment temperature of air conditioner, the first coil temperature of indoor heat exchanger and compressor
Delivery temperature；
When detecting the temperature default less than first of the temperature difference between first coil temperature and the first indoor environment temperature
Degree, and when the first exhaust temperature is greater than the second preset temperature, determine that coolant leakage occurs for the air conditioner.
Optionally, it is described obtain the first indoor environment temperature of air conditioner, indoor heat exchanger the first coil temperature and
Before the step of first exhaust temperature of compressor, the detection method of the air-conditioner coolant leakage further include:
In the operational process of air conditioner, whether the duration for detecting air conditioner continuous service under the current model reaches
First preset duration；
If so, executing the first coil temperature of first indoor environment temperature for obtaining air conditioner, indoor heat exchanger
And compressor first exhaust temperature the step of.
Optionally, it is described obtain the first indoor environment temperature of air conditioner, indoor heat exchanger the first coil temperature and
Before the step of first exhaust temperature of compressor, the detection method of the air-conditioner coolant leakage further include:
Determine the current operational mode of the air conditioner；
If so, executing the first coil temperature of first indoor environment temperature for obtaining air conditioner, indoor heat exchanger
And compressor first exhaust temperature the step of.
Optionally, before described the step of determining the air conditioner generation coolant leakage, the air-conditioner coolant leakage
Detection method further include:
When detecting the temperature default less than first of the temperature difference between first coil temperature and the first indoor environment temperature
Degree, and the first exhaust temperature be greater than the second preset temperature when, update first detection number；
If the updated first detection number is greater than the first preset times, the judgement air conditioner hair is executed
The step of raw coolant leakage, and the first detection number is reset；
After described the step of updating the first detection number, the detection method of the air-conditioner coolant leakage further include:
If the updated first detection number is less than or equal to first preset times, the air-conditioning is controlled
The compressor of device is opened after closing the second preset duration.
Optionally, after the current operational mode step of the determination air conditioner, the air-conditioner coolant leakage
Detection method further comprises the steps of:
When the current operational mode of air conditioner is refrigeration mode or dehumidification mode, the air conditioner is obtained in current mould
Outdoor environment temperature under formula；
If the outdoor environment temperature is greater than third preset temperature, the second current indoor environment of the air conditioner is obtained
Second coil temperature of temperature and indoor heat exchanger；
When detecting that the temperature difference between second indoor environment temperature and second coil temperature is pre- less than the 4th
If when temperature, determining that coolant leakage occurs for the air conditioner；
If the outdoor environment temperature is less than or equal to the third preset temperature, it is current to obtain the compressor
Second exhaust temperature；
When the second exhaust temperature is greater than five preset temperatures, determine that coolant leakage occurs for the air conditioner.
Optionally, before described the step of determining the air conditioner generation coolant leakage, the air-conditioner coolant leakage
Detection method further include:
Detecting that the temperature difference between second indoor environment temperature and second coil temperature is pre- less than the 4th
If when temperature, alternatively, updating the second detection number when detecting that the second exhaust temperature is greater than five preset temperatures；
If the updated second detection number is greater than the second preset times, the judgement air conditioner hair is executed
The step of raw coolant leakage, and the second detection number is reset；
After described the step of updating the second detection number, the detection method of the air-conditioner coolant leakage further include:
If the updated second detection number is less than or equal to second preset times, the air-conditioning is controlled
The compressor of device is opened after closing the second preset duration.
In addition, to achieve the above object, the present invention also provides a kind of detection device of air-conditioner coolant leakage, the air conditioners
The detection device of coolant leakage includes:
Temperature acquisition module, for obtaining the first indoor environment temperature of air conditioner, the first coil pipe temperature of indoor heat exchanger
The first exhaust temperature of degree and compressor；
Refrigerant detection module, for working as the temperature detected between first coil temperature and the first indoor environment temperature
It is cold to determine that the air conditioner occurs less than the first preset temperature, and when the first exhaust temperature is greater than the second preset temperature for difference
Matchmaker's leakage.
Optionally, the detection device of the air-conditioner coolant leakage further include:
Time detection module continues under the current model in the operational process of air conditioner, detecting the air conditioner
Whether the duration of operation reaches the first preset duration；
The temperature acquisition module is also used to: if so, obtaining the first indoor environment temperature, the indoor heat exchanger of air conditioner
The first coil temperature and compressor first exhaust temperature.
Optionally, the detection device of the air-conditioner coolant leakage further include:
Mode deciding module, for determining the current operational mode of the air conditioner；
The temperature acquisition module is also used to: if the present mode of the air conditioner is heating mode, obtaining the sky
Adjust the first indoor environment temperature, the first coil temperature of indoor heat exchanger and the first row of compressor of device under the current model
Temperature degree.
Optionally, the temperature acquisition module is also used to: if the present mode be refrigeration mode or dehumidification mode,
Obtain the outdoor environment temperature of the air conditioner under the current model；
And if the outdoor environment temperature is greater than third preset temperature, obtain the current second Room of the air conditioner
Second coil temperature of interior environment temperature and indoor heat exchanger；
The refrigerant detection module is also used to: when detecting second indoor environment temperature and second coil temperature
Between temperature difference less than four preset temperatures when, determine that coolant leakage occurs for the air conditioner；
The temperature acquisition module is also used to: if the outdoor environment temperature is less than or equal to the default temperature of the third
Degree, then obtain the current second exhaust temperature of the compressor；
The refrigerant detection module is also used to: when the second exhaust temperature is greater than five preset temperatures, described in judgement
Coolant leakage occurs for air conditioner.
The detection method and device of air-conditioner coolant leakage proposed by the present invention, in the operational process of air conditioner, for
Operating status is monitored, and obtains the of the first indoor environment temperature, the first coil temperature of indoor heat exchanger and compressor
One delivery temperature, when detecting the temperature default less than first of the temperature difference between the first coil temperature and the first indoor environment temperature
Degree, when due to normal heating operation, coil temperature can be much higher than indoor environment temperature, and when refrigerating operaton, coil temperature can be remote low
In indoor environment temperature, i.e. temperature difference between the first coil temperature and the first indoor environment temperature of indoor heat exchanger is larger,
When coolant leakage occurs, the refrigeration or heating effect of air-conditioning are deteriorated, and cause the coil temperature of indoor heat exchanger that can gradually connect
It is bordering on indoor environment temperature, causes the temperature difference between the first coil temperature and the first indoor environment temperature smaller；In addition, when cold
When matchmaker leaks, because coolant leakage can reduce compressor sucking coolant quantity, the calorific value for causing refrigerant to take away compressor subtracts
Few, delivery temperature just rises, and causes the actual exhaust air temperature of compressor can be much higher than its theoretical delivery temperature, i.e. first row temperature
Degree is much higher than the second preset temperature, therefore, when detecting the temperature difference between the first coil temperature and the first indoor environment temperature
Less than the first preset temperature, while when first exhaust temperature is greater than the second preset temperature, determine that coolant leakage occurs for air conditioner.
Detailed description of the invention
Fig. 1 is the flow chart of the detection method first embodiment of the air condition of that present invention coolant leakage；
Fig. 2 is the flow chart of the detection method second embodiment of the air condition of that present invention coolant leakage；
Fig. 3 is the functional block diagram of the detection device first embodiment of the air condition of that present invention coolant leakage；
Fig. 4 is the functional block diagram of the detection device second embodiment of the air condition of that present invention coolant leakage.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of detection method of air-conditioner coolant leakage.It is the air condition of that present invention refrigerant shown in referring to Fig.1
The flow chart of the detection method first embodiment of leakage.
In the present embodiment, the detection method of air-conditioner coolant leakage includes:
Step S10 obtains the first indoor environment temperature of air conditioner, the first coil temperature of indoor heat exchanger and compression
The first exhaust temperature of machine.
Step S20, when detecting the temperature difference between first coil temperature and the first indoor environment temperature less than
One preset temperature, and when the first exhaust temperature is greater than the second preset temperature, determine that coolant leakage occurs for the air conditioner.
In the operational process of air conditioner, the operating status of air conditioner is monitored, obtains air conditioner in current fortune
First coil temperature of the first indoor environment temperature, indoor heat exchanger under row mode and the first exhaust temperature of compressor.
And calculate the temperature difference between the first coil temperature and the first indoor environment temperature.It should be noted that being related in following embodiment
And to temperature difference be the numerical value being calculated absolute value, i.e., be positive value.For example, the first coil temperature and the first interior
Temperature difference between environment temperature refers to that the first coil temperature subtracts the absolute value for the numerical value that the first indoor environment temperature obtains.One
As in the case of, under refrigeration mode or dehumidification mode, the first coil temperature is less than the first indoor environment temperature, in heating mode
Under, the first coil temperature is greater than the first indoor environment temperature.
Wherein, first indoor environment temperature, the first coil temperature of indoor heat exchanger and the first row of compressor
Temperature degree can be arranged according to the temperature sensor that corresponding position is arranged in.
As an implementation, in the temperature difference being calculated between the first coil temperature and the first indoor environment temperature
Later, judge whether the temperature difference is less than first preset temperature, if so, judging whether the first exhaust temperature is greater than
Second preset temperature, and when judging that the first exhaust temperature is greater than second preset temperature, determine air conditioner
Coolant leakage；If the temperature difference being calculated between the first coil temperature and the first indoor environment temperature is more than or equal to first
Preset temperature then can no longer detect whether first exhaust temperature is greater than the second preset temperature；And continue to above-mentioned each temperature
Value is detected.
As another embodiment, it can first judge that first exhaust temperature is after getting above-mentioned each temperature value
It is no to be greater than the second preset temperature, if so, the temperature difference between the first coil temperature and the first indoor environment temperature is calculated,
And judge whether the temperature difference is less than first preset temperature, if so, determining that coolant leakage occurs for air conditioner；If first row
Temperature degree is less than or equal to the second preset temperature, then can no longer calculate the first coil temperature and the first indoor environment temperature it
Between temperature difference；And continue to detect above-mentioned each temperature value.
Wherein, above-mentioned first preset temperature and the second preset temperature can be obtained previously according to simulated experiment, and can be with
It is adjusted according to the running parameter of the actual motion environment of air conditioner and/or the compressor of air conditioner.
Further, in order to improve coolant leakage judgement accuracy, before step S10, air-conditioner coolant leakage
Detection method further include:
In the operational process of air conditioner, whether the duration for detecting air conditioner continuous service under the current model reaches
First preset duration；If so, executing the first coil pipe of first indoor environment temperature for obtaining air conditioner, indoor heat exchanger
The step of temperature and the first exhaust temperature of compressor.
That is, after air conditioner is switched on operation a period of time, when compressor and the operation shape of indoor and outdoor heat exchanger
After state reaches stable state, then detect whether refrigerant leaks.After air conditioner is switched on operation or switch mode operation,
Whether the duration of detection air conditioner continuous service under the current model reaches the first preset duration, wherein first it is default can be with
It presets as needed, can be air conditioner and reach duration required for steady operational status.If detecting, air conditioner is being worked as
When the duration of continuous service reaches the first preset duration under premode, step S10 is executed.It can also further detect
When the duration of air conditioner continuous service under the current model reaches the first preset duration, it is default that control air conditioner continues to run third
Duration obtains Average indoor environment temperature, averagely coil temperature and compressor of the air conditioner in the third preset duration
Average exhaust, the Average indoor environment temperature that will acquire make average coil temperature as the first indoor environment temperature
For the first coil temperature, using average exhaust as first exhaust temperature.
It is understood that the first preset temperature and the second preset temperature that are proposed in the present embodiment, the first preset duration
And third preset duration etc. can be according to the working environment and nominal parameter of air conditioner, negative as the parameter of judgment threshold
Loading capability etc. is preset.
Further, after determining that coolant leakage occurs for air conditioner, control air conditioner is out of service, and exports refrigerant
The fault message of leakage, such as shown on control panel or control device.
The detection method for the air-conditioner coolant leakage that the present embodiment proposes, in the operational process of air conditioner, for operation
State is monitored, and obtains the first indoor environment temperature, the first coil temperature of indoor heat exchanger and the first row of compressor
Temperature degree, when detect the temperature difference between the first coil temperature and the first indoor environment temperature less than the first preset temperature, by
When normal heating operation, coil temperature can be much higher than indoor environment temperature, and when refrigerating operaton, coil temperature can be far below interior
Environment temperature, i.e. temperature difference between the first coil temperature and the first indoor environment temperature of indoor heat exchanger are larger, are occurring
When coolant leakage, the refrigeration or heating effect of air-conditioning are deteriorated, and cause the coil temperature of indoor heat exchanger that can move closer in room
Interior environment temperature causes the temperature difference between the first coil temperature and the first indoor environment temperature smaller；In addition, working as refrigerant
When leakage, because coolant leakage can reduce compressor sucking coolant quantity, the calorific value for causing refrigerant to take away compressor is reduced, exhaust
Temperature just rises, and causes the actual exhaust air temperature of compressor can be much higher than its theoretical delivery temperature, i.e. first exhaust temperature is far high
In the second preset temperature, therefore, when detecting the temperature difference between the first coil temperature and the first indoor environment temperature less than
One preset temperature, at the same first exhaust temperature be greater than the second preset temperature when, determine air conditioner occur coolant leakage.
The second embodiment of the detection method of the air condition of that present invention coolant leakage is proposed based on first embodiment.Referring to Fig. 2
Shown, in the present embodiment, in order to improve the accuracy for judging whether air conditioner occurs coolant leakage, air conditioner is in different fortune
Judge whether refrigerant leaks in different ways under row mode.
Before step S10, the detection method of air-conditioner coolant leakage further include:
Step S30 determines the current operational mode of the air conditioner；
If the current operational mode of the air conditioner is heating mode, S10 is thened follow the steps.
After step S30, the detection method of air-conditioner coolant leakage is further comprised the steps of:
Step S40 obtains the sky if the current operational mode of the air conditioner is refrigeration mode or dehumidification mode
Adjust the outdoor environment temperature of device under the current model；
Step S50 obtains second of the air conditioner currently if the outdoor environment temperature is greater than third preset temperature
Second coil temperature of indoor environment temperature and indoor heat exchanger；
Step S60, when detecting that the temperature difference between second indoor environment temperature and second coil temperature is small
When four preset temperatures, determine that coolant leakage occurs for the air conditioner；
Step S70 obtains the compression if the outdoor environment temperature is less than or equal to the third preset temperature
The current second exhaust temperature of machine；
Step S80 determines that the air conditioner occurs refrigerant and lets out when the second exhaust temperature is greater than five preset temperatures
Leakage.
When air conditioner is run with heating mode, general outdoor environment temperature is lower, and under normal circumstances, i.e., refrigerant is not sent out
In the case where raw leakage, the delivery temperature of compressor can be slightly less than the delivery temperature of the compressor of air conditioner in cooling mode.
It therefore, can be in conjunction with the temperature difference between the first coil temperature and the first indoor environment temperature in order to improve the accuracy of judgement
Coolant leakage is detected with the delivery temperature of compressor.
When air conditioner is in a chiller mode or dehumidification mode is run, if outdoor environment temperature is higher, the exhaust of compressor
Temperature can reach higher, and when the temperature is excessively high, compressor will start stoppage protection；If outdoor environment temperature is lower, intraventricular pressure
The refrigeration effect of contracting machine can be poor, at this point, the temperature difference between the coil temperature and indoor environment temperature of indoor heat exchanger can be compared with
It is small.Therefore, in order to improve coolant leakage detection accuracy, determine the current operational mode of air conditioner be refrigeration mode or
When dehumidification mode, outdoor environment temperature is obtained, when outdoor environment temperature is greater than third preset temperature, obtains air conditioner current
Second coil temperature of the second indoor environment temperature and indoor heat exchanger under mode, and detecting the temperature between them
When degree difference is less than four preset temperatures, determine that coolant leakage occurs for air conditioner because under normal circumstances, when outdoor environment temperature compared with
Gao Shi, indoor refrigeration effect is preferable, and the second coil temperature can be far below the second indoor environment temperature；When outdoor environment temperature is less than
Or be equal to third preset temperature, then the second exhaust temperature of compressor is obtained, and detect that second exhaust temperature is greater than the 5th
When preset temperature, determine that coolant leakage occurs for air conditioner.
It is understood that the third preset temperature proposed in the present embodiment, the 4th preset temperature and the 5th preset temperature
It can be set in advance according to the working environment and nominal parameter of air conditioner, load capacity etc. Deng the parameter as judgment threshold
It sets.
Further, in order to reduce there is a situation where judging by accident, the first detection number of setting and the second detection number are initial
Value is zero.In a heating mode, when detecting the temperature difference between first coil temperature and the first indoor environment temperature
Less than the first preset temperature, and when the first exhaust temperature is greater than the second preset temperature, the first detection number is updated；
If the updated first detection number is greater than the first preset times, the judgement air conditioner hair is executed
The step of raw coolant leakage, and the first detection number is reset；
After the step of updating the first detection number, the detection method of the air-conditioner coolant leakage further include:
If the updated first detection number is less than or equal to first preset times, the air-conditioning is controlled
The compressor of device is opened after closing the second preset duration.
Detect the temperature difference between the first coil temperature and the first indoor environment temperature less than the first preset temperature, and
When the first exhaust temperature is greater than the second preset temperature, the first detection number is added 1, and judge the first detection time after adding 1
Whether number is greater than the first preset times, if so, determining that coolant leakage occurs for air conditioner, the compressor for otherwise controlling air conditioner stops
It reopens, and continues with the mode operation before out of service again after only running the second preset duration.Above-mentioned first default time
Number, the second preset times and the second preset duration can according to need setting, for example, the first preset times, second default time
Number is disposed as 3-5 times；Second preset duration is set as 3-5 minutes.
Under refrigeration mode or dehumidification mode, second indoor environment temperature and the second coil pipe temperature are being detected
When temperature difference between degree is less than four preset temperatures, alternatively, detecting that the second exhaust temperature is greater than the 5th default temperature
When spending, the second detection number is updated；
If the updated second detection number is greater than the second preset times, the judgement air conditioner hair is executed
The step of raw coolant leakage, and the second detection number is reset；
After the step of updating the second detection number, the detection method of the air-conditioner coolant leakage further include:
If the updated second detection number is less than or equal to second preset times, the air-conditioning is controlled
The compressor of device is opened after closing the second preset duration.
Based on principle same as above-mentioned heating mode, under refrigeration mode or dehumidification mode, similarly for detecting
The case where temperature difference between second indoor environment temperature and second coil temperature is less than four preset temperatures and second
Delivery temperature is counted greater than the case where five preset temperatures, when series is accumulated to certain number, determines air conditioner
Coolant leakage, to reduce the case where judging by accident.
The present invention also proposes a kind of detection device of air-conditioner coolant leakage.
It is the functional module signal of the detection device first embodiment of the air condition of that present invention coolant leakage referring to shown in Fig. 3
Figure.
In this embodiment, the detection device of air-conditioner coolant leakage includes:
Temperature acquisition module 10, for obtaining the first indoor environment temperature of air conditioner, the first coil pipe of indoor heat exchanger
The first exhaust temperature of temperature and compressor；
Refrigerant detection module 20, for working as the temperature detected between first coil temperature and the first indoor environment temperature
Degree difference determines that the air conditioner occurs less than the first preset temperature, and when the first exhaust temperature is greater than the second preset temperature
Coolant leakage.
In the operational process of air conditioner, temperature acquisition module 10 is monitored the operating status of air conditioner, obtains empty
Adjust first indoor environment temperature of the device under current operational mode, the first coil temperature of indoor heat exchanger and compressor
First exhaust temperature.And calculate the temperature difference between the first coil temperature and the first indoor environment temperature.It should be noted that with
The temperature difference being related in lower embodiment is the absolute value for the numerical value being calculated, i.e., is positive value.For example, the first coil pipe temperature
Temperature difference between degree and the first indoor environment temperature refers to that the first coil temperature subtracts the number that the first indoor environment temperature obtains
The absolute value of value.Under normal circumstances, under refrigeration mode or dehumidification mode, the first coil temperature is less than the first indoor environment temperature
Degree, in a heating mode, the first coil temperature are greater than the first indoor environment temperature.
Wherein, first indoor environment temperature, the first coil temperature of indoor heat exchanger and the first row of compressor
Temperature degree can be arranged according to the temperature sensor that corresponding position is arranged in.
As an implementation, in the temperature difference being calculated between the first coil temperature and the first indoor environment temperature
Later, judge whether the temperature difference is less than first preset temperature, if so, judging whether the first exhaust temperature is greater than
Second preset temperature, and when judging that the first exhaust temperature is greater than second preset temperature, refrigerant detection module 20
Determine that coolant leakage occurs for air conditioner；If the temperature difference being calculated between the first coil temperature and the first indoor environment temperature is big
In or equal to the first preset temperature, then it can no longer detect whether first exhaust temperature is greater than the second preset temperature；And continue
Above-mentioned each temperature value is detected.
As another embodiment, it can first judge that first exhaust temperature is after getting above-mentioned each temperature value
It is no to be greater than the second preset temperature, if so, the temperature difference between the first coil temperature and the first indoor environment temperature is calculated,
And judge whether the temperature difference is less than first preset temperature, if so, refrigerant detection module 20 determines that air conditioner generation is cold
Matchmaker's leakage；If first exhaust temperature is less than or equal to the second preset temperature, the first coil temperature and the can be no longer calculated
Temperature difference between one indoor environment temperature；And continue to detect above-mentioned each temperature value.
Wherein, above-mentioned first preset temperature and the second preset temperature can be obtained previously according to simulated experiment, and can be with
It is adjusted according to the running parameter of the actual motion environment of air conditioner and/or the compressor of air conditioner.
Further, in order to improve coolant leakage judgement accuracy, the air-conditioner coolant leakage detection device also
Include:
Time supervision module continues under the current model in the operational process of air conditioner, detecting the air conditioner
Whether the duration of operation reaches the first preset duration；Temperature acquisition module 10 is also used to if so, obtaining the first Room of air conditioner
The first exhaust temperature of interior environment temperature, the first coil temperature of indoor heat exchanger and compressor.
That is, after air conditioner is switched on operation a period of time, when compressor and the operation shape of indoor and outdoor heat exchanger
After state reaches stable state, then detect whether refrigerant leaks.After air conditioner is switched on operation or switch mode operation,
Whether the duration of detection air conditioner continuous service under the current model reaches the first preset duration, wherein first it is default can be with
It presets as needed, can be air conditioner and reach duration required for steady operational status.If detecting, air conditioner is being worked as
When the duration of continuous service reaches the first preset duration under premode, temperature acquisition module 10 obtains the first indoor ring of air conditioner
The first exhaust temperature of border temperature, the first coil temperature of indoor heat exchanger and compressor.It can also further detect
When reaching the first preset duration to the duration of air conditioner continuous service under the current model, it is pre- that control air conditioner continues to run third
If duration, Average indoor environment temperature, average coil temperature and compressor of the air conditioner in the third preset duration are obtained
Average exhaust, the Average indoor environment temperature that will acquire is as the first indoor environment temperature, by average coil temperature
As the first coil temperature, using average exhaust as first exhaust temperature.
It is understood that the first preset temperature and the second preset temperature that are proposed in the present embodiment, the first preset duration
And third preset duration etc. can be according to the working environment and nominal parameter of air conditioner, negative as the parameter of judgment threshold
Loading capability etc. is preset.
Further, which further includes message output module, for controlling after determining that coolant leakage occurs for air conditioner
Air conditioner is out of service, and exports the fault message that refrigerant leaks, such as carry out on control panel or control device
Display.
The detection device for the air-conditioner coolant leakage that the present embodiment proposes, in the operational process of air conditioner, for operation
State is monitored, and obtains the first indoor environment temperature, the first coil temperature of indoor heat exchanger and the first row of compressor
Temperature degree, when detect the temperature difference between the first coil temperature and the first indoor environment temperature less than the first preset temperature, by
When normal heating operation, coil temperature can be much higher than indoor environment temperature, and when refrigerating operaton, coil temperature can be far below interior
Environment temperature, i.e. temperature difference between the first coil temperature and the first indoor environment temperature of indoor heat exchanger are larger, are occurring
When coolant leakage, the refrigeration or heating effect of air-conditioning are deteriorated, and cause the coil temperature of indoor heat exchanger that can move closer in room
Interior environment temperature causes the temperature difference between the first coil temperature and the first indoor environment temperature smaller；In addition, working as refrigerant
When leakage, because coolant leakage can reduce compressor sucking coolant quantity, the calorific value for causing refrigerant to take away compressor is reduced, exhaust
Temperature just rises, and causes the actual exhaust air temperature of compressor can be much higher than its theoretical delivery temperature, i.e. first exhaust temperature is far high
In the second preset temperature, therefore, when detecting the temperature difference between the first coil temperature and the first indoor environment temperature less than
One preset temperature, at the same first exhaust temperature be greater than the second preset temperature when, determine air conditioner occur coolant leakage.
The second embodiment of the detection device of the air condition of that present invention coolant leakage is proposed based on first embodiment.Referring to Fig. 4
Shown, in the present embodiment, in order to improve the accuracy for judging whether air conditioner occurs coolant leakage, air conditioner is in different fortune
Judge whether refrigerant leaks in different ways under row mode.
The detection device of air-conditioner coolant leakage further include:
Mode deciding module 30, for determining the current operational mode of the air conditioner；
Temperature acquisition module 10 is also used to: if the current operational mode of the air conditioner is heating mode, obtain described in
The first of air conditioner the first indoor environment temperature under the current model, the first coil temperature of indoor heat exchanger and compressor
Delivery temperature.
Temperature acquisition module 10 is also used to: if the current operational mode of the air conditioner is refrigeration mode or dehumidifying mould
Formula then obtains the outdoor environment temperature of the air conditioner under the current model；And if the outdoor environment temperature is greater than third
Preset temperature then obtains the second coil temperature of the second current indoor environment temperature of the air conditioner and indoor heat exchanger；
Refrigerant detection module 20 is also used to: when detect second indoor environment temperature and second coil temperature it
Between temperature difference less than four preset temperatures when, determine that coolant leakage occurs for the air conditioner；
Temperature acquisition module 10 is also used to: if the outdoor environment temperature is less than or equal to the third preset temperature,
Then obtain the current second exhaust temperature of the compressor；
Refrigerant detection module 20 is also used to: when the second exhaust temperature is greater than five preset temperatures, determining the sky
Adjust device that coolant leakage occurs.
When air conditioner is run with heating mode, general outdoor environment temperature is lower, and under normal circumstances, i.e., refrigerant is not sent out
In the case where raw leakage, the delivery temperature of compressor can be slightly less than the delivery temperature of the compressor of air conditioner in cooling mode.
It therefore, can be in conjunction with the temperature difference between the first coil temperature and the first indoor environment temperature in order to improve the accuracy of judgement
Coolant leakage is detected with the delivery temperature of compressor.
When air conditioner is in a chiller mode or dehumidification mode is run, if outdoor environment temperature is higher, the exhaust of compressor
Temperature can reach higher, and when the temperature is excessively high, compressor will start stoppage protection；If outdoor environment temperature is lower, intraventricular pressure
The refrigeration effect of contracting machine can be poor, at this point, the temperature difference between the coil temperature and indoor environment temperature of indoor heat exchanger can be compared with
It is small.Therefore, in order to improve coolant leakage detection accuracy, determine the current operational mode of air conditioner be refrigeration mode or
When dehumidification mode, outdoor environment temperature is obtained, when outdoor environment temperature is greater than third preset temperature, obtains air conditioner current
Second coil temperature of the second indoor environment temperature and indoor heat exchanger under mode, and detecting the temperature between them
When degree difference is less than four preset temperatures, determine that coolant leakage occurs for air conditioner because under normal circumstances, when outdoor environment temperature compared with
Gao Shi, indoor refrigeration effect is preferable, and the second coil temperature can be far below the second indoor environment temperature；When outdoor environment temperature is less than
Or be equal to third preset temperature, then the second exhaust temperature of compressor is obtained, and detect that second exhaust temperature is greater than the 5th
When preset temperature, determine that coolant leakage occurs for air conditioner.
It is understood that the third preset temperature proposed in the present embodiment, the 4th preset temperature and the 5th preset temperature
It can be set in advance according to the working environment and nominal parameter of air conditioner, load capacity etc. Deng the parameter as judgment threshold
It sets.
Further, in order to reduce there is a situation where judging by accident, the first detection number of setting and the second detection number are initial
Value is zero.The device further includes timing module, is used for: in a heating mode, when detecting first coil temperature and
Temperature difference between one indoor environment temperature is less than the first preset temperature, and the first exhaust temperature is greater than the second preset temperature
When, update the first detection number；
Refrigerant detection module 20 is also used to: if the updated first detection number is greater than the first preset times, being sentenced
Coolant leakage occurs for the fixed air conditioner；
The timing module is also used to: when refrigerant detection module 20 determines that coolant leakage occurs for the air conditioner, by institute
State the clearing of the first detection number；
The device further includes compressor control module, if being less than or equal to for the updated first detection number
First preset times are opened after then controlling compressor the second preset duration of closing of the air conditioner.
Detect the temperature difference between the first coil temperature and the first indoor environment temperature less than the first preset temperature, and
When the first exhaust temperature is greater than the second preset temperature, the first detection number is added 1, and judge the first detection time after adding 1
Whether number is greater than the first preset times, if so, determining that coolant leakage occurs for air conditioner, the compressor for otherwise controlling air conditioner stops
It reopens, and continues with the mode operation before out of service again after only running the second preset duration.Above-mentioned first default time
Number, the second preset times and the second preset duration can according to need setting, for example, the first preset times, second default time
Number is disposed as 3-5 times；Second preset duration is set as 3-5 minutes.
Timing module is also used to: under refrigeration mode or dehumidification mode, detecting second indoor environment temperature
When temperature difference between second coil temperature is less than four preset temperatures, alternatively, detecting the second row temperature
When degree is greater than five preset temperatures, the second detection number is updated；
Refrigerant detection module 20 is also used to: if the updated second detection number is greater than the second preset times, being sentenced
Coolant leakage occurs for the fixed air conditioner；
The timing module is also used to: when refrigerant detection module 20 determines that coolant leakage occurs for the air conditioner, by institute
State the clearing of the second detection number；
Compressor control module is also used to: if the updated second detection number is less than or equal to described second in advance
If number, then opened after controlling compressor the second preset duration of closing of the air conditioner.
Based on principle same as above-mentioned heating mode, under refrigeration mode or dehumidification mode, similarly for detecting
The case where temperature difference between second indoor environment temperature and second coil temperature is less than four preset temperatures and second
Delivery temperature is counted greater than the case where five preset temperatures, when series is accumulated to certain number, determines air conditioner
Coolant leakage, to reduce the case where judging by accident.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of detection method of air-conditioner coolant leakage, which is characterized in that the detection method packet of the air-conditioner coolant leakage
It includes:
Determine the current operational mode of the air conditioner；
If the current operational mode of the air conditioner is heating mode, the first indoor environment temperature, the interior of air conditioner are obtained
First coil temperature of heat exchanger and the first exhaust temperature of compressor；
When detect the temperature difference between first coil temperature and the first indoor environment temperature less than the first preset temperature, and
When the first exhaust temperature is greater than the second preset temperature, determine that coolant leakage occurs for the air conditioner；
If the current operational mode of the air conditioner is refrigeration mode or dehumidification mode, the air conditioner is obtained in current mould
Outdoor environment temperature under formula；
If the outdoor environment temperature is greater than third preset temperature, the second current indoor environment temperature of the air conditioner is obtained
And the second coil temperature of indoor heat exchanger；
When detecting the temperature default less than the 4th of the temperature difference between second indoor environment temperature and second coil temperature
When spending, determine that coolant leakage occurs for the air conditioner.
2. the detection method of air-conditioner coolant leakage according to claim 1, which is characterized in that the acquisition air conditioner
Before the step of first exhaust temperature of first indoor environment temperature, the first coil temperature of indoor heat exchanger and compressor,
The detection method of the air-conditioner coolant leakage further include:
In the operational process of air conditioner, whether the duration for detecting air conditioner continuous service under the current model reaches first
Preset duration；
If so, execute it is described obtain the first indoor environment temperature of air conditioner, indoor heat exchanger the first coil temperature and
The step of first exhaust temperature of compressor.
3. the detection method of air-conditioner coolant leakage according to any one of claim 1 to 2, which is characterized in that described
Before determining the step of coolant leakage occurs for the air conditioner, the detection method of the air-conditioner coolant leakage further include:
When detect the temperature difference between first coil temperature and the first indoor environment temperature less than the first preset temperature, and
When the first exhaust temperature is greater than the second preset temperature, the first detection number is updated；
If the updated first detection number is greater than the first preset times, it is cold to execute the judgement air conditioner generation
The step of matchmaker leaks, and the first detection number is reset；
After described the step of updating the first detection number, the detection method of the air-conditioner coolant leakage further include:
If the updated first detection number is less than or equal to first preset times, the air conditioner is controlled
Compressor is opened after closing the second preset duration.
4. the detection method of air-conditioner coolant leakage according to claim 1, which is characterized in that if the air conditioner
Current operational mode is refrigeration mode or dehumidification mode, then obtains the outdoor environment temperature of the air conditioner under the current model
After the step of spending, the detection method of the air-conditioner coolant leakage further include:
If the outdoor environment temperature is less than or equal to the third preset temperature, second of the compressor currently is obtained
Delivery temperature；
When the second exhaust temperature is greater than five preset temperatures, determine that coolant leakage occurs for the air conditioner.
5. the detection method of air-conditioner coolant leakage according to claim 4, which is characterized in that described to determine the air-conditioning
Before the step of coolant leakage, occurs for device, the detection method of the air-conditioner coolant leakage further include:
Detecting the temperature difference between second indoor environment temperature and second coil temperature less than the 4th default temperature
When spending, alternatively, updating the second detection number when detecting that the second exhaust temperature is greater than five preset temperatures；
If the updated second detection number is greater than the second preset times, it is cold to execute the judgement air conditioner generation
The step of matchmaker leaks, and the second detection number is reset；
After described the step of updating the second detection number, the detection method of the air-conditioner coolant leakage further include:
If the updated second detection number is less than or equal to second preset times, the air conditioner is controlled
Compressor is opened after closing the second preset duration.
6. a kind of detection device of air-conditioner coolant leakage, which is characterized in that the detection device packet of the air-conditioner coolant leakage
It includes:
Mode deciding module, for determining the current operational mode of the air conditioner；
Temperature acquisition module obtains the first of air conditioner if the operational mode current for the air conditioner is heating mode
The first exhaust temperature of indoor environment temperature, the first coil temperature of indoor heat exchanger and compressor；
Refrigerant detection module detects that the temperature difference between first coil temperature and the first indoor environment temperature is small for working as
In the first preset temperature, and when the first exhaust temperature is greater than the second preset temperature, determine that the air conditioner occurs refrigerant and lets out
Leakage；
The temperature acquisition module is also used to: if the current operational mode of the air conditioner is refrigeration mode or dehumidification mode,
Then obtain the outdoor environment temperature of the air conditioner under the current model；
And if the outdoor environment temperature is greater than third preset temperature, obtain the current second Room inner ring of the air conditioner
Second coil temperature of border temperature and indoor heat exchanger；
The refrigerant detection module is also used to: when detecting between second indoor environment temperature and second coil temperature
Temperature difference less than four preset temperatures when, determine that coolant leakage occurs for the air conditioner.
7. the detection device of air-conditioner coolant leakage according to claim 6, which is characterized in that the air-conditioner coolant is let out
The detection device of dew further include:
Time detection module, in the operational process of air conditioner, detecting air conditioner continuous service under the current model
Duration whether reach the first preset duration；
The temperature acquisition module is also used to: if so, obtain the first indoor environment temperature of air conditioner, indoor heat exchanger the
The first exhaust temperature of one coil temperature and compressor.
8. the detection device of air-conditioner coolant leakage according to claim 6, which is characterized in that the temperature acquisition module
It is also used to: if the outdoor environment temperature is less than or equal to the third preset temperature, it is current to obtain the compressor
Second exhaust temperature；
The refrigerant detection module is also used to: when the second exhaust temperature is greater than five preset temperatures, determining the air-conditioning
Coolant leakage occurs for device.
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| CN107436016B (en) * | 2017-07-27 | 2020-02-28 | 广东美的制冷设备有限公司 | Air conditioner, method and system for detecting leakage of refrigerant in air conditioner and storage medium |
| CN107655162A (en) * | 2017-08-21 | 2018-02-02 | 珠海格力电器股份有限公司 | Refrigerant detection method, device, dehumidifier and equipment |
| CN110878985B (en) * | 2018-09-06 | 2021-05-18 | 奥克斯空调股份有限公司 | Method and device for detecting refrigerant leakage of air conditioner |
| CN110895020B (en) * | 2018-09-12 | 2021-08-27 | 奥克斯空调股份有限公司 | Refrigerant leakage detection method and air conditioner |
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| CN113970163A (en) * | 2020-07-24 | 2022-01-25 | 广东美的制冷设备有限公司 | Air conditioner and refrigerant leakage detection method and device thereof, and readable storage medium |
| CN112032935A (en) * | 2020-08-24 | 2020-12-04 | Tcl空调器(中山)有限公司 | Control method for fluorine-lacking protection of air conditioner, air conditioner and storage medium |
| CN113639401A (en) * | 2021-07-08 | 2021-11-12 | 青岛海尔空调电子有限公司 | Refrigerant leakage detection control method of air conditioner |
| CN113847703B (en) * | 2021-10-29 | 2023-08-15 | 海信（广东）空调有限公司 | Refrigerant leakage detection method of dehumidifier |
| CN117450622A (en) * | 2022-07-18 | 2024-01-26 | 青岛海尔空调电子有限公司 | Method and device for detecting valve box leakage of three-pipeline simultaneous cooling and heating air conditioner and electronic equipment |
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