CN109595741A - Air-conditioning and its coolant leakage detection method and device - Google Patents
Air-conditioning and its coolant leakage detection method and device Download PDFInfo
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- CN109595741A CN109595741A CN201811456902.0A CN201811456902A CN109595741A CN 109595741 A CN109595741 A CN 109595741A CN 201811456902 A CN201811456902 A CN 201811456902A CN 109595741 A CN109595741 A CN 109595741A
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- air
- conditioning
- temperature
- secondary refrigerant
- refrigerant leakage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a kind of air-conditioning and its coolant leakage detection method and devices, method includes the following steps: detecting whether the air-conditioning currently secondary refrigerant leakage occurs in operation of air conditioner；If detecting the air-conditioning secondary refrigerant leakage currently occurs, the wind speed for reducing blower in the air-conditioning is controlled；It controls the air-conditioning and preset duration is run with the wind speed after reducing, and detect whether the air-conditioning secondary refrigerant leakage occurs again, if detecting that secondary refrigerant leakage occurs in air-conditioning again, control the air-conditioning and shut down operation.This method is when detecting that refrigerant is revealed, by the wind speed for changing blower in air-conditioning, the temperature of indoor environment and evaporator is driven to change, if the temperature of environment and evaporator detects that refrigerant is revealed again after changing indoors, just veritably determine that the case where coolant leakage occurs in air-conditioning, so as to reduce False Rate, and entire detection process is carried out by software, it does not need additionally to increase refrigerant detection device, it is at low cost.
Description
Technical field
The present invention relates to air-conditioning technical fields, more particularly to a kind of air-conditioning and its coolant leakage detection method and device.
Background technique
Air-conditioning mainly passes through the coolant transmission thermal energy in it, generates refrigeration effect.Air-conditioning after running for a period of time, often
Often there is the phenomenon that refrigeration effect variation.The appearance of such case is usually associated with the generation of coolant leakage phenomenon in air-conditioning.
In the related technology, often on air-conditioning be arranged coolant leakage detection device, by air-conditioning increase pressure detecting,
The devices such as flow detection, Concentration Testing, directly detection coolant quantity.
But present inventor discovery at least the foregoing technology has the following technical problems:
1, the accuracy for detecting coolant leakage is lower, the case where erroneous judgement by accident frequent occurrence；
2, it needs additionally to increase refrigerant detection device, higher cost in air-conditioning.
Summary of the invention
The embodiment of the present application solves existing skill by providing a kind of air-conditioning and its coolant leakage detection method and device
The low and at high cost technical problem of coolant leakage accuracy is detected in art, realizes the accurate detection to coolant leakage, and drop
The low technical effect of testing cost.
The embodiment of the present application provides a kind of secondary refrigerant leakage detection method of air-conditioning, comprising the following steps:
In operation of air conditioner, detect whether the air-conditioning currently secondary refrigerant leakage occurs；
If detecting the air-conditioning secondary refrigerant leakage currently occurs, the wind speed for reducing blower in the air-conditioning is controlled；
It controls the air-conditioning and preset duration is run with the wind speed after reducing, and detect whether the air-conditioning goes out again
Existing secondary refrigerant leakage controls the air-conditioning and shuts down operation if detecting that secondary refrigerant leakage occurs in air-conditioning again.
According to one embodiment of present invention, whether the detection air-conditioning there is secondary refrigerant leakage, comprising:
Obtain the first room temperature and the first evaporator temperature before the operation of air conditioner in first time period；
Obtain the second room temperature and the second evaporator temperature after the operation of air conditioner in second time period；
It is steamed according to first room temperature, first evaporator temperature, second room temperature and described second
Device temperature is sent out, detects whether the air-conditioning secondary refrigerant leakage occurs.
According to one embodiment of present invention, it is described according to first room temperature, first evaporator temperature,
Second room temperature and second evaporator temperature, detect whether the air-conditioning secondary refrigerant leakage occurs, comprising:
Judge whether the first absolute difference of second room temperature and second evaporator temperature is pre- less than first
If temperature gap；
Judge whether the second absolute difference of first room temperature and second room temperature is default less than second
Temperature gap；
Judge whether first evaporator temperature and the third absolute difference of second evaporator temperature are less than third
Preset temperature difference；
If first absolute difference is less than the first preset temperature difference, and second absolute difference is less than
The second preset temperature difference, and the third absolute difference is less than third preset temperature difference, then determines that the air-conditioning is full
The foot secondary refrigerant leakage decision condition, identifies that secondary refrigerant leakage occurs in the air-conditioning.
According to one embodiment of present invention, described after determining that the air-conditioning meets the secondary refrigerant leakage decision condition
Method further include:
Obtain the delivery temperature of the air-conditioning and the electric current of outdoor compressor；
Judge whether the delivery temperature of the air-conditioning is greater than preset delivery temperature threshold value；
Judge whether the electric current of the outdoor compressor is less than preset current threshold；
If the delivery temperature of the air-conditioning is greater than the delivery temperature threshold value, and the electric current of the outdoor compressor is small
In the current threshold, then detect that secondary refrigerant leakage occurs in the air-conditioning.
According to one embodiment of present invention, described after determining that the air-conditioning meets the secondary refrigerant leakage decision condition
Method further include:
Obtain the actual motion frequency of outdoor compressor and the electric current of outdoor compressor；
Judge whether the actual motion frequency is greater than preset frequency threshold；
Judge whether the electric current of the outdoor compressor is less than preset current threshold；
If the actual motion frequency is greater than the frequency threshold, and the electric current of the outdoor compressor is greater than described
Current threshold then detects that secondary refrigerant leakage occurs in the air-conditioning.
According to one embodiment of present invention, after the judgement air-conditioning meets the secondary refrigerant leakage decision condition,
The method also includes:
Identify whether the air-conditioning is in exhaust frequency limit state；
The actual motion frequency for obtaining outdoor compressor, judges whether the actual motion frequency is greater than preset frequency
Threshold value；
If the air-conditioning is in the exhaust frequency limit state, and the actual motion frequency is less than the frequency threshold,
Then detect that secondary refrigerant leakage occurs in the air-conditioning.
According to one embodiment of present invention, before detecting the air-conditioning and whether secondary refrigerant leakage occur, further includes:
Current outdoor temperature is obtained, determines that the outdoor temperature is in the range preset.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1, when detecting that coolant leakage occurs in air-conditioning, control reduces the wind speed of blower in air-conditioning, after air-conditioning is to reduce
Wind speed run preset duration when, again detect air-conditioning whether there is coolant leakage.This method is detecting that refrigerant reveals
When, by changing the wind speed of blower in air-conditioning, drive the temperature of indoor environment and evaporator to change, if ring indoors
The temperature of border and evaporator detects that refrigerant is revealed again after changing, and just veritably determines that air-conditioning refrigerant occurs and lets out
The case where leakage, so as to reduce False Rate, and entire detection process is carried out by software, does not need additionally to increase refrigerant
Detection device, it is at low cost.
2, it in conjunction with a variety of Rule of judgment, detects whether air-conditioning occurs coolant leakage, improves the accuracy of detection.
Detailed description of the invention
Fig. 1 is the flow diagram of the secondary refrigerant leakage detection method of air-conditioning in one embodiment disclosed by the invention；
Fig. 2 is that whether detection air-conditioning goes out in the secondary refrigerant leakage detection method of the air-conditioning of one embodiment disclosed by the invention
The method flow schematic diagram of existing coolant leakage；
Fig. 3 be the air-conditioning of one embodiment disclosed by the invention secondary refrigerant leakage detection method in further detect air-conditioning
Whether the method flow schematic diagram of coolant leakage is occurred；
Fig. 4 is the structural schematic diagram of the secondary refrigerant leakage detection device of air-conditioning in one embodiment disclosed by the invention；
Fig. 5 is the structural schematic diagram of air-conditioning in one embodiment disclosed by the invention；
Fig. 6 is the structural schematic diagram of electronic equipment in one embodiment disclosed by the invention.
Specific embodiment
In order to solve to detect the low and at high cost technical problem of coolant leakage accuracy in the related technology, the application is provided
The secondary refrigerant leakage detection method of air-conditioning a kind of, when detecting that coolant leakage occurs in air-conditioning, control reduces in air-conditioning this method
The wind speed of blower detects whether air-conditioning coolant leakage occurs again when air-conditioning runs preset duration with the wind speed after reducing.
This method, by changing the wind speed of blower in air-conditioning, drives indoor environment and evaporator when detecting that refrigerant is revealed
Temperature changes, if the temperature of environment and evaporator detects that refrigerant is revealed again after changing indoors,
Veritably determine that the case where coolant leakage occurs in air-conditioning, so as to reduce False Rate, and entire detection process passes through software
It carries out, does not need additionally to increase refrigerant detection device, it is at low cost.
In order to better understand the above technical scheme, the exemplary of the disclosure is more fully described below with reference to accompanying drawings
Embodiment.Although showing the exemplary embodiment of the disclosure in attached drawing, it being understood, however, that may be realized in various forms
The disclosure and should not be limited by the embodiments set forth herein.It is to be able to more thoroughly manage on the contrary, providing these embodiments
The disclosure is solved, and the scope of the present disclosure can be fully disclosed to those skilled in the art.
In order to better understand the above technical scheme, right in conjunction with appended figures and specific embodiments
Above-mentioned technical proposal is described in detail.
Embodiment one
Fig. 1 is the flow chart of the secondary refrigerant leakage detection method of air-conditioning in one embodiment disclosed by the invention.Such as Fig. 1 institute
Show, the secondary refrigerant leakage detection method of the air-conditioning of the embodiment of the present invention, comprising the following steps:
S101: in operation of air conditioner, whether detection air-conditioning currently there is secondary refrigerant leakage.
In operation of air conditioner, whether real-time detection air-conditioning there is coolant leakage.If coolant leakage occurs for air-conditioning, hold
Row step S102；Otherwise, S105 is thened follow the steps.
When whether detection air conditioner coolant leaks, the temperature of evaporator in air-conditioning can be detected by temperature sensor,
And detection room temperature is sentenced according to the temperature and room temperature of evaporator to whether the refrigerant of air-conditioning occurs leakage
It is disconnected.The method of specific detection coolant leakage, which can refer to, to be described below, and details are not described herein.
S102, control reduce the wind speed of blower in air-conditioning, and control air-conditioning it is default with the wind speed operation after reducing when
It is long.
When the refrigerant for detecting air-conditioning leaks, controller, which controls the blower in air-conditioning, reduces wind speed, so that air-conditioning
It is run in the state of systemic presupposition.Further, control air-conditioning runs preset duration with the wind speed after reducing, and air-conditioning is made to exist
Under state adjusted, ideal indoor environment state when indoor environment to detection coolant leakage again is controlled.
For example, if the rotating speed of air conditioner fan currently set is greater than 2 grades of wind speed, controller can be by blower wind speed
It is changed to 2 grades of operations；If currently setting rotation speed of fan is not greater than 2 grades, blower wind speed can be changed to 1 grade of fortune by controller
Row.For runing time, can choose with wind speed adjusted operation 5 minutes, specifically, can according to the actual situation depending on,
In the present embodiment without limitation.
S103, whether detection air-conditioning there is secondary refrigerant leakage again.
After air-conditioning reduces wind speed operation preset time, indoor environment will change, at this point, detection air-conditioning is again
It is no coolant leakage occur.
For example, after operation of air conditioner wind speed reduces, the temperature of evaporator and the temperature of indoor environment can be changed.For example,
Under air-conditioning is in refrigeration mode, if after reducing wind speed, due to reducing the cooling capacity to indoor blowout, in this way in evaporator
The cooling capacity of interior reservation can be used to reduce the temperature of evaporator；It is reduced accordingly, due to the cooling capacity of blowout, room temperature will
It will be slow raising.For another example when air-conditioning is under heating mode, if after reducing wind speed, due to reducing to indoor blowout
Heat, the heat retained in evaporator in this way can be used to be promoted the temperature of evaporator；Accordingly, due to the heat of blowout
It reduces, room temperature will will be slow decline.
After air-conditioning runs preset duration with low wind speed, detected again to whether air-conditioning coolant leakage occurs, again
When detecting the temperature and room temperature of evaporator, if the temperature and room temperature of evaporator can meet coolant leakage again
Rule of judgment, then illustrate that coolant leakage really occurs in air-conditioning, thens follow the steps S104；Otherwise, step S105 is executed.
S104, control air-conditioning shut down operation.
Determining that coolant leakage occurs for air-conditioning, controller controls air-conditioning and shuts down operation, it can be sent out fault alarm, with
User is reminded to overhaul air-conditioning.
S105, determine that operation of air conditioner is normal.
It determines that coolant leakage does not occur for air-conditioning, then determines air-conditioning to operate normally, and air-conditioning is monitored in real time, with
Timely and effectively find coolant leakage problem.
It on the basis of above-described embodiment, can in order to timely and effectively detect whether air-conditioning coolant leakage occurs
According to the interior after the room temperature and evaporator temperature and operation of air conditioner preset duration before operation of air conditioner preset duration
Temperature and evaporator temperature detect air conditioner coolant leakage.Fig. 2 is the air-conditioning of one embodiment disclosed by the invention
Detect whether air-conditioning the method flow diagram of coolant leakage occurs in secondary refrigerant leakage detection method.As shown in Fig. 2, the detection refrigerant
The method flow of leakage, comprising the following steps:
The first room temperature and the first evaporator temperature before S201, acquisition operation of air conditioner in first time period.
Before operation of air conditioner (also referred to as " before starting "), obtained in a period of time by the temperature sensor in air-conditioning
Indoor temperature value and evaporator temperature values.For convenient for distinguishing, the indoor temperature obtained in the step is known as the first Indoor Temperature
Degree, the temperature of evaporator are known as the first evaporator temperature.
It should be noted that the first room temperature and the first evaporator temperature are respectively temperature for the accuracy of measurement
Room temperature average value and evaporator temperature average value in a period of time of sensor measurement (i.e. in first time period).
The second room temperature and the second evaporator temperature after S202, acquisition operation of air conditioner in second time period.
After operation of air conditioner, by the temperature sensor in air-conditioning obtain again indoor temperature value in a period of time and
Evaporator temperature values.For convenient for differentiation, the indoor temperature obtained in the step is known as the second room temperature, evaporator
Temperature is known as the second evaporator temperature.
It should be noted that the second room temperature and the second evaporator temperature are respectively temperature for the accuracy of measurement
Room temperature average value and evaporator temperature average value in a period of time of sensor measurement (i.e. in second time period).
S203, according to the first room temperature, the first evaporator temperature, the second room temperature and the second evaporator temperature, inspection
Survey whether air-conditioning secondary refrigerant leakage occurs.
It, can be according to the first room temperature, the first evaporator temperature, second when determining whether air-conditioning coolant leakage occurs
Difference between room temperature and the second evaporator temperature between different value, is determined.
Specifically, judging whether the first absolute difference of the second room temperature and the second evaporator temperature is pre- less than first
If temperature gap；
Judge whether the second absolute difference of the first room temperature and the second room temperature is poor less than the second preset temperature
Value；
Judge whether the third absolute difference of the first evaporator temperature and the second evaporator temperature is less than third preset temperature
Difference；
If the first absolute difference is less than the first preset temperature difference, and the second absolute difference is less than the second preset temperature
Difference, and third absolute difference is less than third preset temperature difference, then determines that air-conditioning meets secondary refrigerant leakage decision condition, identifies
There is secondary refrigerant leakage in air-conditioning.Otherwise, then determine that operation of air conditioner is normal.
It should be understood that need to only obtain air-conditioning reduces wind speed operation when whether detection air-conditioning secondary refrigerant leakage occurs again
The second room temperature and the second evaporator temperature in second time period after preset duration, judge the first required Room
Interior temperature and the first evaporator temperature can still take the first room temperature got before operation of air conditioner and the first evaporator
Temperature.
On the basis of above-described embodiment, in order to accurately detect whether air-conditioning coolant leakage occurs, judging
It further include the actual motion frequency and outdoor compressor according to outdoor compressor after air-conditioning meets secondary refrigerant leakage decision condition
Electric current further detects air conditioner coolant leakage.Fig. 3 is the refrigerant of the air-conditioning of one embodiment disclosed by the invention
The method flow diagram whether air-conditioning coolant leakage occurs further is detected in leakage detection method.As shown in figure 3, in the base of Fig. 2
The method flow of the detection coolant leakage on plinth, further comprising the steps of:
The electric current of S301, the actual motion frequency for obtaining outdoor compressor and outdoor compressor.
When coolant leakage occurs in air-conditioning, refrigeration effect will decline, and cannot effectively reach temperature set by user.And
In order to reach the temperature value of user preset, air-conditioning will increase its working power in the same state, at this point, air conditioning chamber
The actual motion frequency of external compression machine will be increased with it with electric current, therefore, can pass through the practical fortune of acquisition outdoor compressor
The electric current of line frequency and outdoor compressor, and then judge whether air-conditioning occurs coolant leakage.
Specifically, the electric current of outdoor compressor can be obtained, by current sensor it is possible to further according to outdoor
The electric current of compressor determines the actual motion frequency of outdoor compressor, alternatively, directly obtaining current outdoor compression according to controller
The actual motion frequency of machine.
S302, judge whether actual motion frequency is greater than preset frequency threshold, and judge that the electric current of outdoor compressor is
It is no to be less than preset current threshold.
Specifically, refrigeration effect will decline when coolant leakage occurs in air-conditioning, at this point, in order to make room temperature
Target temperature set by user is reached, air-conditioning will then be run with high-frequency.In addition, refrigerant is being turned by gaseous state when operation of air conditioner
After the process for turning to liquid, need to be stirred refrigerant.In whipping process, outdoor compressor run when current value with it is cold
How much positive correlations of matchmaker's amount.Therefore, it can be preset with frequency threshold and current threshold in systems, by according to pressure
Size of the actual motion frequency and current value of contracting machine relative to their own preset threshold, to whether coolant leakage occurring
Judged.In order to reduce False Rate, in the present embodiment, if the actual motion frequency of outdoor compressor is greater than preset
Frequency threshold, and judge that the electric current of outdoor compressor is less than preset current threshold, then judge that coolant leakage occurs in air-conditioning, i.e.,
It executes S303 and otherwise then executes S304.
S303, detect that secondary refrigerant leakage occurs in air-conditioning.
Determine that coolant leakage occurs in air-conditioning.
S304, determine that operation of air conditioner is normal.
It determines that operation of air conditioner is normal, and continues to leak air conditioner coolant and detect.
Optionally, after coolant leakage, the coolant quantity in compressor of air conditioner also can be reduced accordingly, and refrigerant is caused to take away compression
The calorific value of electromechanical machine is reduced, and causes the temperature of air-conditioning exhaust outlet to rise, therefore, with continued reference to Fig. 3, on the basis of Fig. 2
The method flow of the detection coolant leakage, can with the following steps are included:
The electric current of S401, the delivery temperature for obtaining air-conditioning and outdoor compressor；
Specifically, the delivery temperature of air-conditioning can be obtained by the temperature sensor in air-conditioning.Obtain outdoor compressor
Electric current can be with reference to the description in above-mentioned steps S301, and details are not described herein.
S402, judge whether the delivery temperature of air-conditioning is greater than the delivery temperature of preset air-conditioning, and the electricity of outdoor compressor
Whether stream is less than preset current threshold.
Specifically, there are coolant leakages for air-conditioning if the delivery temperature of air-conditioning is greater than preset delivery temperature threshold value
It may.Under normal circumstances, also positive correlation therefore can further, to room for the height with current value of delivery temperature
The electric current of external compression machine is judged, if the electric current of outdoor compressor is less than preset current threshold, is thened follow the steps
S403；Otherwise, S404 is thened follow the steps.
S403, detect that secondary refrigerant leakage occurs in air-conditioning.
Determine that coolant leakage occurs in air-conditioning.
S404, determine that operation of air conditioner is normal.
It determines that operation of air conditioner is normal, and continues to leak air conditioner coolant and detect.
Optionally, when the delivery temperature of air-conditioning reaches certain temperature, the controller in air-conditioning will control compressor and reduce
Frequency operation, air-conditioning state at this moment are exhaust frequency limit state.Therefore, with continued reference to Fig. 3, the detection on the basis of Fig. 2
The method flow of coolant leakage, can with the following steps are included:
S501, the actual motion frequency for obtaining outdoor compressor；
Specifically, obtaining the actual motion frequency of outdoor compressor, the description in above-mentioned steps S301 can be referred to,
This is repeated no more.
S502, judge whether actual motion frequency is less than preset frequency threshold, and identify whether air-conditioning is in exhaust limit
Frequency state.
It identifies whether outdoor compressor is in exhaust frequency limit state according to the height of the delivery temperature of air-conditioning, works as air-conditioning
Delivery temperature be more than preset exhaust frequency limit temperature when, that is, determine air-conditioning be in be vented frequency limit state.Due in exhaust frequency limit
When state, the compressor of the air-conditioning of air-conditioning is run with low frequency, therefore, if air-conditioning when being vented frequency limit state, such as fruit
Border running frequency is greater than frequency threshold, then explanation is excessive discharge temperature caused by being run due to compressor high-frequency, and triggering is empty
It transfers in into exhaust frequency limit state, then can determine that coolant leakage occurs in air-conditioning, is i.e. execution step S503；Otherwise, it thens follow the steps
S504。
S503, detect that secondary refrigerant leakage occurs in air-conditioning.
Determine that coolant leakage occurs in air-conditioning.
S504, determine that operation of air conditioner is normal.
In practical application, when outdoor temperature is lower than certain temperature value or higher than certain temperature value, air-conditioning just can not
It runs well, at this moment there may be report coolant leakage by mistake.It in order to avoid this kind of situation, can be in systems
Preset a temperature range, temperature sensor when detecting that coolant leakage occurs in air-conditioning, and on air-conditioner outdoor unit or other
When the current outdoor temperature value of the temperature sensor detection of position is in preset temperature range, it just can determine that air-conditioning occurs
Coolant leakage.
For example, the outdoor environment temperature range that most domestic air conditionings work normally at present is -15~48 DEG C, only
Have when the temperature of current outdoor is between -15~48 DEG C, is just capable of determining whether that coolant leakage occurs.
It should be noted that different deterministic processes can be set for the deterministic process of secondary refrigerant leakage twice, for example,
It, can be by room temperature, evaporator temperature, compressor operating frequency and compressor current when the judgement of first time secondary refrigerant leakage
It combines and is judged, specifically combine judgment mode, may refer to the above description, details are not described herein again.Second of refrigerant is let out
When the judgement of dew, due to having carried out a secondary refrigerant leakage judgement before, specifically can only selection be judged according to temperature, no
The other parameters of compressor are judged again.It should be understood that in the judgment process, it can be according to the actual situation to sky
The parameters of allocation and transportation row are set, and are not limited herein.
Technical solution in above-mentioned the embodiment of the present application, has at least the following technical effects or advantages:
1, when detecting that coolant leakage occurs in air-conditioning, control reduces the wind speed of blower in air-conditioning, after air-conditioning is to reduce
Wind speed run preset duration when, again detect air-conditioning whether there is coolant leakage.This method is detecting that refrigerant reveals
When, by changing the wind speed of blower in air-conditioning, drive the temperature of indoor environment and evaporator to change, if ring indoors
The temperature of border and evaporator detects that refrigerant is revealed again after changing, and just veritably determines that air-conditioning refrigerant occurs and lets out
The case where leakage, so as to reduce False Rate, and entire detection process is carried out by software, does not need additionally to increase refrigerant
Detection device, it is at low cost.
2, it in conjunction with a variety of Rule of judgment, detects whether air-conditioning occurs coolant leakage, improves the accuracy of detection.
Based on the same inventive concept, the embodiment of the invention also provides the corresponding device of method in embodiment one, see implementation
Example two.
Embodiment two
Method in order to realize above-described embodiment, the present invention also provides a kind of secondary refrigerant leakage detection devices.
Fig. 4 is the structural block diagram of the secondary refrigerant leakage detection device of air-conditioning in one embodiment disclosed by the invention.Such as Fig. 4
It is shown, the secondary refrigerant leakage detection device, comprising:
Detection module 401, in operation of air conditioner, whether detection air-conditioning currently secondary refrigerant leakage occurs；
First processing module 402, if currently there is secondary refrigerant leakage for detecting air-conditioning, controlling reduces air-conditioning apoplexy
The wind speed of machine；
Second processing module 403, the wind speed after reducing for controlling air-conditioning runs preset duration, and detection is empty again
It adjusts and whether secondary refrigerant leakage occurs, if detecting that secondary refrigerant leakage occurs in air-conditioning again, control air-conditioning and shut down operation.
Further, detection module 401 are also used to:
The first room temperature and the first evaporator temperature before obtaining operation of air conditioner preset duration；
The second room temperature and the second evaporator temperature after obtaining preset duration described in operation of air conditioner；
According to the first room temperature, the first evaporator temperature, the second room temperature and the second evaporator temperature, detection is empty
It adjusts and whether secondary refrigerant leakage occurs.
Further, detection module 401 are also used to:
Judge whether the first absolute difference of the second room temperature and the second evaporator temperature is poor less than the first preset temperature
Value；
Judge whether the second absolute difference of the first room temperature and the second room temperature is poor less than the second preset temperature
Value；
Judge whether the third absolute difference of the first evaporator temperature and the second evaporator temperature is less than third preset temperature
Difference；
If the first absolute difference is less than the first preset temperature difference, and the second absolute difference is less than the second preset temperature
Difference, and third absolute difference is less than third preset temperature difference, then determines that air-conditioning meets secondary refrigerant leakage decision condition, identifies
There is secondary refrigerant leakage in air-conditioning.
Further, detection module 401 are also used to:
Obtain the delivery temperature of air-conditioning and the electric current of outdoor compressor；
Judge whether the delivery temperature of air-conditioning is greater than preset delivery temperature threshold value；
Judge whether the electric current of outdoor compressor is less than preset current threshold；
If the delivery temperature of air-conditioning is greater than delivery temperature threshold value, and the electric current of outdoor compressor is less than current threshold, then
Detect that secondary refrigerant leakage occurs in air-conditioning.
Further, detection module 401 are also used to:
Obtain the actual motion frequency of outdoor compressor and the electric current of outdoor compressor；
Judge whether actual motion frequency is greater than preset frequency threshold；
Judge whether the electric current of outdoor compressor is less than preset current threshold；
If actual motion frequency is greater than frequency threshold, and the electric current of outdoor compressor is greater than current threshold, then detects
There is secondary refrigerant leakage in air-conditioning.
Further, detection module 401 are also used to:
Whether identification air-conditioning is in exhaust frequency limit state；
The actual motion frequency for obtaining outdoor compressor, judges whether actual motion frequency is greater than preset frequency threshold；
If air-conditioning is in the exhaust frequency limit state, and actual motion frequency is less than frequency threshold, then detects air-conditioning
There is secondary refrigerant leakage.
Further, detection module 401 are also used to:
Current outdoor temperature is obtained, determines that room temperature is in the range preset.
Technical solution in above-mentioned the embodiment of the present application, has at least the following technical effects or advantages:
1, the device is when detecting that coolant leakage occurs in air-conditioning, and control reduces the wind speed of blower in air-conditioning, air-conditioning with
When wind speed after reduction runs preset duration, detect whether air-conditioning coolant leakage occurs again.This method is detecting that refrigerant goes out
When now revealing, by the wind speed of blower in change air-conditioning, the temperature of indoor environment and evaporator is driven to change, if
Indoor environment and the temperature of evaporator detect that refrigerant is revealed after changing again, just veritably determine that air-conditioning occurs
The case where coolant leakage, so as to reduce False Rate, and entire detection process is carried out by software, does not need additionally to increase
Add refrigerant detection device, it is at low cost.
2, the device combines a variety of Rule of judgment, and whether detection air-conditioning occurs coolant leakage, improve the accurate of detection
Degree.
By the device that the embodiment of the present invention two is introduced, filled used by the method to implement the embodiment of the present invention one
It sets, so based on the method that the embodiment of the present invention one is introduced, the affiliated personnel in this field can understand the specific structure of the device
And deformation, so details are not described herein.Device used by the method for all embodiment of the present invention one belongs to the present invention and is intended to
The range of protection.
In order to realize above-described embodiment, the present invention also provides a kind of air-conditionings, as shown in figure 5, the air-conditioning includes above-mentioned reality
Apply the secondary refrigerant leakage detection device 110 of the air-conditioning in example.
In order to realize above-described embodiment, the present invention also provides a kind of electronic equipment, as shown in fig. 6, the electronic equipment packet
Include memory 601, processor 602；Wherein, the processor 602 is by reading the executable program stored in memory 601
Code runs program corresponding with executable program code, with each step for realizing method above.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer journey
Sequence product.Therefore, complete hardware embodiment, complete software embodiment or combining software and hardware aspects can be used in the present invention
The form of embodiment.Moreover, it wherein includes the calculating of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions each in flowchart and/or the block diagram
The combination of process and/or box in process and/or box and flowchart and/or the block diagram.It can provide these computers
Processor of the program instruction to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices
To generate a machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute
For realizing the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram
Device.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that instruction stored in the computer readable memory generation includes
The manufacture of command device, the command device are realized in one box of one or more flows of the flowchart and/or block diagram
Or the function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that
Series of operation steps are executed on computer or other programmable devices to generate computer implemented processing, thus calculating
The instruction executed on machine or other programmable devices is provided for realizing in one or more flows of the flowchart and/or side
The step of function of being specified in block diagram one box or multiple boxes.
It should be noted that in the claims, any reference symbol between parentheses should not be configured to power
The limitation that benefit requires.Word "comprising" does not exclude the presence of component or step not listed in the claims.Before component
Word "a" or "an" does not exclude the presence of multiple such components.The present invention can be by means of including several different components
Hardware and realized by means of properly programmed computer.In the unit claims listing several devices, these
Several in device, which can be, to be embodied by the same item of hardware.Word first, second, and third makes
With not indicating any sequence.These words can be construed to title.
Although preferred embodiments of the present invention have been described, once a person skilled in the art knows basic wounds
The property made concept, then additional changes and modifications may be made to these embodiments.It is wrapped so the following claims are intended to be interpreted as
It includes preferred embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from of the invention by those skilled in the art
Spirit and scope.In this way, if these modifications and changes of the present invention belongs to the model of the claims in the present invention and its equivalent technologies
Within enclosing, then the present invention is also intended to include these modifications and variations.
Claims (17)
1. a kind of secondary refrigerant leakage detection method of air-conditioning, which comprises the following steps:
In operation of air conditioner, detect whether the air-conditioning currently secondary refrigerant leakage occurs；
If detecting the air-conditioning secondary refrigerant leakage currently occurs, the wind speed for reducing blower in the air-conditioning is controlled；
It controls the air-conditioning and preset duration is run with the wind speed after reducing, and detect whether the air-conditioning refrigerant occurs again
Leakage controls the air-conditioning and shuts down operation if detecting that secondary refrigerant leakage occurs in air-conditioning again.
2. being wrapped the method according to claim 1, wherein whether the detection air-conditioning secondary refrigerant leakage occurs
It includes:
Obtain the first room temperature and the first evaporator temperature before the operation of air conditioner in first time period；
Obtain the second room temperature and the second evaporator temperature after the operation of air conditioner in second time period；
According to first room temperature, first evaporator temperature, second room temperature and second evaporator
Temperature, detects whether the air-conditioning secondary refrigerant leakage occurs.
3. according to the method described in claim 2, it is characterized in that, it is described according to first room temperature, it is described first steam
Device temperature, second room temperature and second evaporator temperature are sent out, detects whether the air-conditioning secondary refrigerant leakage occurs, is wrapped
It includes:
Judge that whether default less than first the first absolute difference of second room temperature and second evaporator temperature is warm
Spend difference；
Judge the second absolute difference of first room temperature and second room temperature whether less than the second preset temperature
Difference；
Judge whether the third absolute difference of first evaporator temperature and second evaporator temperature is default less than third
Temperature gap；
If first absolute difference is less than the first preset temperature difference, and second absolute difference is less than described the
Two preset temperature differences, and the third absolute difference is less than third preset temperature difference, then determines described in the air-conditioning satisfaction
Secondary refrigerant leakage decision condition identifies that secondary refrigerant leakage occurs in the air-conditioning.
4. according to the method described in claim 3, it is characterized in that, meeting the secondary refrigerant leakage in the judgement air-conditioning determines item
After part, the method also includes:
Obtain the delivery temperature of the air-conditioning and the electric current of outdoor compressor；
Judge whether the delivery temperature of the air-conditioning is greater than preset delivery temperature threshold value；
Judge whether the electric current of the outdoor compressor is less than preset current threshold；
If the delivery temperature of the air-conditioning is greater than the delivery temperature threshold value, and the electric current of the outdoor compressor is less than described
Current threshold then detects that secondary refrigerant leakage occurs in the air-conditioning.
5. according to the method described in claim 3, it is characterized in that, meeting the secondary refrigerant leakage in the judgement air-conditioning determines item
After part, the method also includes:
Obtain the actual motion frequency of outdoor compressor and the electric current of outdoor compressor；
Judge whether the actual motion frequency is greater than preset frequency threshold；
Judge whether the electric current of the outdoor compressor is less than preset current threshold；
If the actual motion frequency is greater than the frequency threshold, and the electric current of the outdoor compressor is greater than the current threshold
Value, then detect that secondary refrigerant leakage occurs in the air-conditioning.
6. according to the method described in claim 3, it is characterized in that, determining that the air-conditioning meets the secondary refrigerant leakage and sentences described
After fixed condition, the method also includes:
Identify whether the air-conditioning is in exhaust frequency limit state；
The actual motion frequency for obtaining outdoor compressor, judges whether the actual motion frequency is greater than preset frequency threshold；
If the air-conditioning is in the exhaust frequency limit state, and the actual motion frequency is less than the frequency threshold, then examines
It measures the air-conditioning and secondary refrigerant leakage occurs.
7. according to the described in any item methods of claim 2-6, which is characterized in that let out whether the detection air-conditioning refrigerant occurs
Before dew, further includes:
Current outdoor temperature is obtained, determines that the outdoor temperature is in the range preset.
8. a kind of secondary refrigerant leakage detection device of air-conditioning characterized by comprising
Detection module, for detecting whether the air-conditioning currently secondary refrigerant leakage occurs in operation of air conditioner；
First processing module, if currently there is secondary refrigerant leakage for detecting the air-conditioning, controlling reduces the air-conditioning apoplexy
The wind speed of machine；
Second processing module, the wind speed after reducing for controlling the air-conditioning runs preset duration, and detects institute again
It states whether air-conditioning secondary refrigerant leakage occurs, if detecting that secondary refrigerant leakage occurs in air-conditioning again, controls the air-conditioning and shut down operation.
9. device according to claim 8, which is characterized in that the detection module is also used to:
Obtain the first room temperature and the first evaporator temperature before the operation of air conditioner in first time period；
Obtain the second room temperature and the second evaporator temperature after the operation of air conditioner in second time period；
According to first room temperature, first evaporator temperature, second room temperature and second evaporator
Temperature, detects whether the air-conditioning secondary refrigerant leakage occurs.
10. device according to claim 9, which is characterized in that the detection module is also used to:
Judge that whether default less than first the first absolute difference of second room temperature and second evaporator temperature is warm
Spend difference；
Judge the second absolute difference of first room temperature and second room temperature whether less than the second preset temperature
Difference；
Judge whether the third absolute difference of first evaporator temperature and second evaporator temperature is default less than third
Temperature gap；
If first absolute difference is less than the first preset temperature difference, and second absolute difference is less than described the
Two preset temperature differences, and the third absolute difference is less than third preset temperature difference, then determines described in the air-conditioning satisfaction
Secondary refrigerant leakage decision condition identifies that secondary refrigerant leakage occurs in the air-conditioning.
11. device according to claim 10, which is characterized in that the detection module is also used to:
Obtain the delivery temperature of the air-conditioning and the electric current of outdoor compressor；
Judge whether the delivery temperature of the air-conditioning is greater than preset delivery temperature threshold value；
Judge whether the electric current of the outdoor compressor is less than preset current threshold；
If the delivery temperature of the air-conditioning is greater than the delivery temperature threshold value, and the electric current of the outdoor compressor is less than described
Current threshold then detects that secondary refrigerant leakage occurs in the air-conditioning.
12. device according to claim 10, which is characterized in that the detection module is also used to:
Obtain the actual motion frequency of outdoor compressor and the electric current of outdoor compressor；
Judge whether the actual motion frequency is greater than preset frequency threshold；
Judge whether the electric current of the outdoor compressor is less than preset current threshold；
If the actual motion frequency is greater than the frequency threshold, and the electric current of the outdoor compressor is greater than the current threshold
Value, then detect that secondary refrigerant leakage occurs in the air-conditioning.
13. device according to claim 10, which is characterized in that the detection module is also used to:
Identify whether the air-conditioning is in exhaust frequency limit state；
The actual motion frequency for obtaining outdoor compressor, judges whether the actual motion frequency is greater than preset frequency threshold；
If the air-conditioning is in the exhaust frequency limit state, and the actual motion frequency is less than the frequency threshold, then examines
It measures the air-conditioning and secondary refrigerant leakage occurs.
14. according to the described in any item devices of claim 8-13, which is characterized in that the detection module is also used to:
Current outdoor temperature is obtained, determines that the outdoor temperature is in the range preset.
15. a kind of air-conditioning characterized by comprising as the secondary refrigerant leakage of the described in any item air-conditionings of claim 8-14 detects
Device.
16. a kind of electronic equipment, which is characterized in that including memory, processor；
Wherein, the processor is run by reading the executable program code stored in the memory can be performed with described
The corresponding program of program code, with the secondary refrigerant leakage detection method for realizing the air-conditioning as described in any in claim 1-7.
17. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, which is characterized in that the program
The secondary refrigerant leakage detection method of the air-conditioning as described in any in claim 1-7 is realized when being executed by processor.
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| CN201811456902.0A CN109595741A (en) | 2018-11-30 | 2018-11-30 | Air-conditioning and its coolant leakage detection method and device |
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|---|---|---|---|
| CN201811456902.0A CN109595741A (en) | 2018-11-30 | 2018-11-30 | Air-conditioning and its coolant leakage detection method and device |
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| CN110160208A (en) * | 2019-05-27 | 2019-08-23 | 广东美的制冷设备有限公司 | Air conditioner and the secondary refrigerant leakage detection method of air conditioner, device |
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| CN110715397A (en) * | 2019-10-18 | 2020-01-21 | 广东美的制冷设备有限公司 | Refrigerant leakage detection method and system of air conditioner and air conditioner |
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| CN110715399A (en) * | 2019-10-21 | 2020-01-21 | 广东美的制冷设备有限公司 | Detection method and device for sensor in air conditioner, air conditioner and electronic equipment |
| CN111121224A (en) * | 2019-12-31 | 2020-05-08 | Tcl空调器(中山)有限公司 | Air conditioner control method, device, terminal and computer readable storage medium |
| CN111397089B (en) * | 2020-03-26 | 2022-02-01 | 广东美的制冷设备有限公司 | Air conditioner detection method, air conditioner and computer readable storage medium |
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| CN111442468A (en) * | 2020-04-10 | 2020-07-24 | 广东美的制冷设备有限公司 | Air conditioner, control method and control device thereof, and computer readable storage medium |
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| WO2023279916A1 (en) * | 2021-07-08 | 2023-01-12 | 青岛海尔空调电子有限公司 | Refrigerant leakage detection control method for air conditioner |
| CN113847703A (en) * | 2021-10-29 | 2021-12-28 | 海信（广东）空调有限公司 | Refrigerant leakage detection method of dehumidifier |
| CN113847703B (en) * | 2021-10-29 | 2023-08-15 | 海信（广东）空调有限公司 | Refrigerant leakage detection method of dehumidifier |
| CN114322200A (en) * | 2022-01-04 | 2022-04-12 | 广东美的制冷设备有限公司 | Air conditioner refrigerant leakage detection method and device, air conditioner and storage medium |
| CN114659232A (en) * | 2022-05-10 | 2022-06-24 | 长虹美菱股份有限公司 | Refrigerator and refrigerant leakage detection method thereof |
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