CN106403173A - Method and device for judging refrigerant leakage of air conditioner - Google Patents
Method and device for judging refrigerant leakage of air conditioner Download PDFInfo
- Publication number
- CN106403173A CN106403173A CN201610814720.0A CN201610814720A CN106403173A CN 106403173 A CN106403173 A CN 106403173A CN 201610814720 A CN201610814720 A CN 201610814720A CN 106403173 A CN106403173 A CN 106403173A
- Authority
- CN
- China
- Prior art keywords
- temperature
- air
- conditioner
- difference
- coolant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention provides a method and device for judging refrigerant leakage of an air conditioner, and relates to the technical field of air conditioners. By adoption of the method and device for judging refrigerant leakage of the air conditioner, the purpose of detecting refrigerant leakage of the air conditioner is achieved. The method for judging refrigerant leakage of the air conditioner specifically comprises the steps that the current outdoor environment temperature, the current outdoor liquid pipe temperature, the current indoor return air temperature and the current indoor anti-freezing temperature of the air conditioner are obtained, and whether refrigerants in the air conditioner leak or not is judged according to the difference value between the absolute difference value of the current outdoor environment temperature and the current outdoor liquid pipe temperature and a first preset threshold value, and the difference value between the absolute difference value of the current indoor return air temperature and the current indoor anti-freezing temperature and a second preset threshold value.
Description
Technical field
The present invention relates to air-conditioner technical field, decision method and device that more particularly, to a kind of air-conditioner coolant is revealed.
Background technology
At present, there is the situation of following three kinds common air-conditioner coolant leakages, the first is air-conditioner air-conditioning in a pre-installation
Itself there is coolant leakage in device；Second be air-conditioner when mounted, due to mobile air-conditioner etc. lead to air-conditioner system occur
Coolant leakage；The third is that, during air-conditioner uses, the coolant leakage that system aging etc. causes.For air-conditioner user,
Generally just can discover air-conditioner only when air-conditioner cooling or heating effect is inconspicuous and secondary refrigerant leakage occurs, and often this when
Wait, according to present case, secondary refrigerant leakage is more seriously it is impossible to judge when air-conditioner secondary refrigerant leakage.If air-conditioner is
Through the situation of secondary refrigerant leakage, and compressor is also in continuous service, and now press oil can be discharged in heat exchanger, and due to lacking
Few coolant can not return in compressor chamber in time, leads to compressor inter deterioration to increase, and ultimately causes compressor damage.
For this problem, the method that prior art passes through built in pressure sensor or low pressure switch in air-conditioner
Secondary refrigerant leakage is detected, the method can make air-conditioner in running, using built-in pressure transducer or low
Pressure value in pressure pressure switch detection compressor, if pressure is lasting too low, is judged to secondary refrigerant leakage or dependent failure, enters one
Step carries out stoppage protection process.But inventor finds, existing secondary refrigerant leakage detection method is only applicable to the air-conditioning of big number
Device, for the air-conditioner of little number, based on factors such as costs, the air-conditioner of little number will not built in pressure sensor or low pressure pressure
Power switch is so that little number air-conditioner cannot detect using prior art that air-conditioner coolant leaks, thus leading to little number empty
Adjust device cannot avoid the compressor abrasion causing due to secondary refrigerant leakage in use.
Therefore, when there is no built in pressure sensor or low pressure switch in air-conditioner, how to detect the cold of air-conditioner
Matchmaker's leakage becomes urgent problem.
Content of the invention
Embodiments of the invention provide a kind of decision method of air-conditioner coolant leakage and device, in order to solve air-conditioning machine examination
Survey the problem of secondary refrigerant leakage.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
In a first aspect, providing the decision method that a kind of air-conditioner coolant is revealed, including：
Obtain the current outdoor ambient temperature of described air-conditioner, current outdoor liquid pipe temperature, current indoor return air temperature with
And the antifreeze junction temperature of current indoor；
Predetermined according to the absolute difference between described current outdoor ambient temperature and described current outdoor liquid pipe temperature and first
Absolute difference between the difference between threshold value, and described current indoor return air temperature and the antifreeze junction temperature of described current indoor and
Difference between two predetermined thresholds, judges whether the coolant in described air-conditioner is revealed；
Wherein, described first predetermined threshold is the outdoor environment temperature when coolant is not revealed for the described air-conditioner and outdoor liquid
The minima of absolute difference between pipe temperature, described second predetermined threshold is the indoor return air when coolant is not revealed for the described air-conditioner
The minima of absolute difference between temperature and indoor antifreeze junction temperature.
Second aspect, provides the decision maker that a kind of air-conditioner coolant is revealed, and this device includes：
Acquisition module, for obtaining the current outdoor ambient temperature of described air-conditioner, current outdoor liquid pipe temperature, working as cup
Interior return air temperature and the antifreeze junction temperature of current indoor；
Determination module, for the described current outdoor ambient temperature that obtained according to described acquisition module and described current outdoor
Difference between the absolute difference between liquid pipe temperature and the first predetermined threshold, and the described current indoor that described acquisition module obtains
Absolute difference between return air temperature and the antifreeze junction temperature of described current indoor and the difference between the second predetermined threshold, judge described sky
Adjust whether the coolant in device is revealed；
Wherein, described first predetermined threshold is the outdoor environment temperature when coolant is not revealed for the described air-conditioner and outdoor liquid
The minima of absolute difference between pipe temperature, described second predetermined threshold is the indoor return air when coolant is not revealed for the described air-conditioner
The minima of absolute difference between temperature and indoor antifreeze junction temperature.
Decision method and device that air-conditioner coolant provided in an embodiment of the present invention is revealed, due in the liquid pipe of air-conditioner
There is the disappearance of the coolant in liquid pipe during leakage in coolant, so that the absolute difference between outdoor environment temperature and outdoor liquid pipe temperature
When there is leakage in coolant in the liquid pipe of air-conditioner for the absolute difference of value and indoor return air temperature and indoor antifreeze junction temperature
Normal value when not leaking less than coolant, therefore, the present invention passes through to obtain current outdoor ambient temperature, the current outdoor of air-conditioner
Liquid pipe temperature, current indoor return air temperature and the antifreeze junction temperature of current indoor, then by current outdoor ambient temperature and current
Between the outdoor environment temperature when coolant is not revealed for the absolute difference and air-conditioner between outdoor liquid pipe temperature and outdoor liquid pipe temperature
The comparison of the minima of absolute difference, and by the absolute difference between current indoor return air temperature and the antifreeze junction temperature of current indoor
The ratio of the minima of absolute difference and between the indoor return air temperature when coolant is not revealed for this air-conditioner and indoor antifreeze junction temperature
Relatively, thus just can determine that air-conditioner whether coolant leakage, it is to avoid air-conditioner cannot built in pressure sensor or low pressure
Switch is it is impossible to enough carry out the problem of coolant detection so that air-conditioner can detect coolant leakage, protection compressor is in secondary refrigerant leakage
When not destroyed, reduce the maintenance cost of air-conditioner, improve air-conditioner detect coolant leakage motility.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be in embodiment or description of the prior art
The accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description be only the present invention some are real
Apply example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the schematic flow sheet of the decision method that a kind of air-conditioner coolant provided in an embodiment of the present invention is revealed；
Fig. 2 is the structural representation of the decision maker that a kind of air-conditioner coolant provided in an embodiment of the present invention is revealed.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
The executive agent of the decision method that air-conditioner coolant provided in an embodiment of the present invention is revealed can be air-conditioner coolant
The decision maker or can be used for revealed executes the electronic equipment of the decision method that above-mentioned air-conditioner coolant is revealed.Wherein, empty
The decision maker adjusting device secondary refrigerant leakage can be central processing unit (the Central Processing in above-mentioned electronic equipment
Unit, CPU) or can be the control unit in above-mentioned electronic equipment or module.The judgement that this air-conditioner coolant is revealed
Device is generally arranged in air-conditioner, for carrying out real-time monitoring to whether coolant in this air-conditioner is revealed.
The terms "and/or", only a kind of incidence relation of description affiliated partner, represents there may be three kinds of passes
System, for example, A and/or B, can represent：, there are A and B, these three situations of individualism B in individualism A simultaneously.In addition, herein
Middle character "/", typically represent forward-backward correlation to as if a kind of relation of "or".
For the ease of clearly describing the technical scheme of the embodiment of the present invention, in an embodiment of the present invention, employ " the
One ", the printed words such as " second " identical entry essentially identical to function or effect or similar item make a distinction, and those skilled in the art can
To understand that the printed words such as " first ", " second " are not defined to quantity and execution order.
Embodiments of the invention provide the decision method that a kind of air-conditioner coolant is revealed, as shown in figure 1, the method is specifically wrapped
Include following steps：
101st, obtain the current outdoor ambient temperature of air-conditioner, current outdoor liquid pipe temperature, current indoor return air temperature with
And the antifreeze junction temperature of current indoor.
Exemplary, above-mentioned outdoor liquid pipe temperature is to be obtained by being disposed in the outdoor the outdoor liquid pipe temperature sensor of machine
, it is generally used for representing the temperature of coolant in outdoor liquid pipe；Above-mentioned outdoor environment temperature is the room by being disposed in the outdoor machine
External environment temperature sensor obtains；The antifreeze junction temperature in above-mentioned interior is the anti-freeze temperature sensor by being disposed in the interior machine
Obtain, be generally used for representing the temperature of coolant in indoor liquid pipe；Above-mentioned indoor return air temperature is by being disposed in the interior machine
Return air temperature sensor obtains, and is generally used for representing indoor environment temperature.
Exemplary, when the temperature that any one temperature sensor in said temperature sensor gets, to be in temperature different
Often during alarm scope, then judge this abnormality of temperature sensors, the decision maker that now this air-conditioner coolant is revealed does not carry out coolant
Leak detection.For example it is generally the case that when temperature sensor short circuit, the temperature that it detects is typically smaller than -40 DEG C, meanwhile,
When temperature sensor open circuit, the temperature that it detects is typically larger than 127 DEG C, therefore, general, and above-mentioned temperature anomaly alerts
Scope can be set as：Less than -40 DEG C or more than 127 DEG C.
Exemplary, before step 101, if air-conditioner is in operating condition, and compressor is in stopped status, then not
Carry out secondary refrigerant leakage abnormality detection.
And, when setting the temperature of this air-conditioner, this air-conditioner is in temperature range and the heating mode of refrigeration mode
Temperature range is all different.Exemplary, the temperature range of refrigeration mode can be 19 DEG C～30 DEG C, the temperature range of heating mode
Can be 16 DEG C～30 DEG C.
In addition, the refrigeration mode of air-conditioner also all has corresponding range of operation with heating mode, when air-conditioner is in as table 1
When outside shown temperature range, compressor of air conditioner then will not start, and also will not carry out secondary refrigerant leakage detection.
Table 1
Wherein, DB represents dry-bulb temperature, and WB represents wet bulb temperature.These data are also to be estimated according to practical situation, very
Difficult quantization.The not air-conditioner of same horsepower, parameter has fine setting, but logic is the same.
102nd, according to the absolute difference between current outdoor ambient temperature and current outdoor liquid pipe temperature and the first predetermined threshold
Between difference, and between the absolute difference between current indoor return air temperature and the antifreeze junction temperature of current indoor and the second predetermined threshold
Difference, judge air-conditioner in coolant whether reveal.
Wherein, the first predetermined threshold is between the outdoor environment temperature when coolant is not revealed for the air-conditioner and outdoor liquid pipe temperature
The minima of absolute difference, the second predetermined threshold is the indoor return air temperature when coolant is not revealed for the air-conditioner and indoor anti-freeze
The minima of absolute difference between temperature.
Specifically, this step 102 can include following content：
A1, when between the absolute difference between current outdoor ambient temperature and current outdoor liquid pipe temperature and the first predetermined threshold
Difference is less than between absolute difference and the second predetermined threshold between 0, and current indoor return air temperature and the antifreeze junction temperature of current indoor
Difference be less than 0 when, judge air-conditioner coolant reveal.
Or,
A2, when between the absolute difference between current outdoor ambient temperature and current outdoor liquid pipe temperature and the first predetermined threshold
Difference is more than or equal to absolute difference and the second predetermined threshold between 0, and current indoor return air temperature and the antifreeze junction temperature of current indoor
When difference between value is more than or equal to 0, then judge that the coolant in air-conditioner is not revealed.
It should be noted that when air-conditioner is in extreme environment (for example, extremely cold, very hot), this air-conditioner can be subject to ring
The impact in border, so that its heat transfer effect is deteriorated, now, if come to this according to the secondary refrigerant leakage decision method that the present invention provides
Air-conditioner carries out secondary refrigerant leakage judgement, then its outdoor environment greatly can may be detected when this air-conditioner coolant does not leak
Absolute difference between temperature and outdoor liquid pipe temperature and the difference between the first predetermined threshold are less than 0, and/or, indoor returning is detected
Absolute difference between air temperature and indoor antifreeze junction temperature and the difference between the second predetermined threshold are less than 0, thus leading to coolant to be let out
The erroneous judgement of dew.
Preferably, the embodiment of the present invention can by the first above-mentioned predetermined threshold be set to air-conditioner do not reveal in coolant and
Outdoor environment temperature is in the minima of absolute difference between outdoor environment temperature during extreme temperature range and outdoor liquid pipe temperature,
The second above-mentioned predetermined threshold is the room when coolant is not revealed and outdoor environment temperature is in extreme temperature range for the air-conditioner
The minima of absolute difference between interior return air temperature and indoor antifreeze junction temperature.
Wherein, above-mentioned extreme temperature range includes outdoor environment temperature less than the first extreme temperature, and/or, outdoor ring
Border temperature is more than the second extreme temperature.Exemplary, the first above-mentioned extreme temperature can be the maximum of extremely low temperature, above-mentioned
The second extreme temperature can be excessive temperature minima.Preferably, above-mentioned extreme temperature range could be arranged to outdoor
Ambient temperature is less than -5 DEG C (degrees Celsius) and outdoor environment temperature is more than+43 DEG C.
Preferably, reveal, in order to improve air-conditioner coolant, the accuracy judging, this step 102 and step A1 can also include
Following content：
B1, when between the absolute difference between current outdoor ambient temperature and current outdoor liquid pipe temperature and the first predetermined threshold
Difference is less than between absolute difference and the second predetermined threshold between 0 and current indoor return air temperature and the antifreeze junction temperature of current indoor
Difference be less than 0, and when all continuing the first predetermined amount of time, then judge that air-conditioner coolant is revealed.
Wherein, the first above-mentioned scheduled time can be changed to by current indoor return air temperature according to this air-conditioner temperature and work as
In cup, design temperature determines, the embodiment of the present invention does not limit to this.
Exemplary, if outdoor liquid pipe temperature represents with Te, outdoor environment temperature is represented with Ta, indoor antifreeze junction temperature is used
Tl represents, indoor return air temperature is represented with Ti, then when this air-conditioner is under refrigeration or the pattern that heats, and the operating of compressor
Time is in initial start stage, and the absolute difference of Te-Ta normally belongs to that [a, b] is interval, the absolute difference of Tl-Ti normally belong to [c,
D] interval, if after T1 minute after compressor start, the difference between the absolute difference of Te-Ta and a is less than 0, and Tl-Ti's is absolute
Difference between difference and c is less than when 0 and when continuing T2 minute, judges secondary refrigerant leakage.
Optionally, damage due to may there is arbitrary temperature sensor in air-conditioner, and when temperature sensor damages, profit
The temperature value being got with temperature sensor is just inaccurate, now, is let out using air-conditioner coolant provided in an embodiment of the present invention
It is nonsensical that the decision method of leakage carries out secondary refrigerant leakage judgement.In order to improve air-conditioner coolant leakage provided in an embodiment of the present invention
Decision method accuracy, can also comprise the steps after step 102：
C1, control air-conditioner are shut down, and are restarted.
C2, the current outdoor ambient temperature reacquiring air-conditioner, current outdoor liquid pipe temperature, current indoor return air temperature
And the antifreeze junction temperature of current indoor.
Absolute difference and first between C3, the current outdoor ambient temperature according to reacquisition and current outdoor liquid pipe temperature
Absolute difference between the current indoor return air temperature of the difference between predetermined threshold and reacquisition and the antifreeze junction temperature of current indoor
Difference between value and the second predetermined threshold, judges whether the coolant in air-conditioner is revealed again.
Specifically, in order to avoid air-conditioner due in secondary refrigerant leakage work, and the compressor fault leading to it is preferred that
When the decision maker first time revealed in air-conditioner coolant judges that this air-conditioner occurs secondary refrigerant leakage, can be to carry out second cold
Before matchmaker reveals judgement, (i.e. before execution step C2, C3) needs to execute C1, and that is, this air-conditioner needs to be set to shut down by compressor
State, and restart so that compressor quits work, and send stop reason code to line control machine, finally make air-conditioner
Shut down.General, after air-conditioner generally shuts down 3 minutes, and 3 minutes, this air-conditioner can be restarted automatically, the embodiment of the present invention pair
The above does not limit.
Meanwhile, air-conditioner, after execution step C3, carries out to this air-conditioner second and second above coolant is let out
After dew judges, if still judging, this air-conditioner coolant leaks, and this air-conditioner triggers alarm, and sends alarm generation to line control machine
Code is so that line control machine quits work entrance stopped status according to this alarm code.Exemplary, this alarm is only when under this air-conditioner
Release when electric.
Additionally, air-conditioner in execution step 102 if it is decided that coolant leakage, then the number of times of coolant leakage can be entered
Row counts.When execution step C1-C3, if judging coolant leakage again, on the basis of the number of times of original coolant leakage
On, carry out stored count, and trigger alarm；If it is determined that coolant leakage does not occur, then do not trigger alarm, the normal work of air-conditioner
Make.
And, when air-conditioner meets pre-conditioned, then the number of times of coolant leakage is reset, and the current wind by air-conditioner
Amount type recovery is the air quantity type of user setup, air quantity type is resetted.Wherein, this is pre-conditioned can be execution
Judge after step 102 that this air-conditioner coolant is revealed and within a specified time judged that this air-conditioner is cold after execution step C1- step C3
Matchmaker reveals, the line control machine of the indoor set of air-conditioner is shut down or, the indoor electromechanical source of air-conditioner is cut-off.For example, when this is specified
Between can be 1 hour, the embodiment of the present invention does not limit to this.
If it should be noted that because outdoor environment temperature is in extreme temperature, the heat exchange of this air-conditioner can be led to imitate
Really bad so that this air-conditioner in the case that coolant is not revealed it is also possible to indoor return air temperature and indoor antifreeze junction temperature occur
The absolute difference of degree is less than the situation of the first predetermined threshold.
Preferably, the air quantity type of this air-conditioner, in execution step C1- step C3, can be reset by the embodiment of the present invention
For low wind type, now, because this air-conditioner is run with low wind air quantity, then indoor return air temperature change is slowly so that indoor return
The absolute difference of air temperature and indoor antifreeze junction temperature absolute difference when high wind air quantity runs same time than this air-conditioner
Increase, thus avoiding occurring the absolute of indoor return air temperature and indoor antifreeze junction temperature when this air-conditioner does not occur coolant leakage
The situation that difference between difference and the first predetermined threshold is less than 0, and then avoid this air-conditioner coolant to reveal erroneous judgement.Meanwhile, if this
When difference between indoor return air temperature and the absolute difference of indoor antifreeze junction temperature and the first predetermined threshold be less than 0, then sentence again
This air-conditioner coolant fixed is revealed, and further increases this air-conditioner coolant and reveals the accuracy judging.
Exemplary, in actual applications, if the design temperature of air-conditioner is represented with Tset, general, it is 15 in area
The air-conditioner of 1 is installed in the room of square meter, then, when no matter this air-conditioner is operated in refrigeration mode or heating mode, works as Ti-
In the case that the absolute difference of Tset is more than 5 DEG C, common, if this 1 air-conditioner does not occur secondary refrigerant leakage, when its compression
When machine runs 8 minutes, the absolute difference of Tl-Ti can be more than 10 DEG C, and the absolute difference of Te-Ta can be more than 4 DEG C, if Tl-Ti's is exhausted
5 DEG C are less than to difference, the absolute difference of Te-Ta is less than 2 DEG C, just most probably cold draining matchmaker, if the absolute difference of Tl-Ti is less than 5
DEG C, the absolute difference of Te-Ta is less than 2 DEG C, and all continues 1 minute, then judge that this 1 air-conditioner coolant is revealed.Additionally, and by
If being in extreme temperature in outdoor environment temperature, in execution step C1- step C3, the air quantity type of this air-conditioner is reset to
Low wind type is so that the absolute difference of Tl-Ti increases, it is to avoid the exhausted of Tl-Ti when this air-conditioner does not occur coolant leakage
Difference is less than with 5 DEG C of situation, if now the absolute difference of Tl-Ti is less than 5 DEG C, the absolute difference of Te-Ta is less than 2 DEG C, and all
Continue 1 minute, then judge that this 1 air-conditioner coolant is revealed again.
It should be noted that whether the coolant again judging in air-conditioner in the present embodiment there is method and the step revealed
Being similar to of detection process in 102, will not be described here.And, after the leakage of this air-conditioner coolant is detected, repeat execution
Step C1- step C3, carries out multiple coolant leakage detection to this air-conditioner, the embodiment of the present invention is to execution step C1- step C3
Number of times do not limit.
The decision method that air-conditioner coolant provided in an embodiment of the present invention is revealed, because the coolant in the liquid pipe of air-conditioner is sent out
The disappearance of the coolant in liquid pipe during raw leakage so that absolute difference between outdoor environment temperature and outdoor liquid pipe temperature and
Coolant in the liquid pipe of air-conditioner for the absolute difference of indoor return air temperature and indoor antifreeze junction temperature occurs during leakage less than cold
Normal value when matchmaker does not leak, therefore, the present invention passes through to obtain current outdoor ambient temperature, the current outdoor liquid pipe temperature of air-conditioner
Degree, current indoor return air temperature and the antifreeze junction temperature of current indoor, then by current outdoor ambient temperature and current outdoor liquid
Absolute difference between outdoor environment temperature when coolant is not revealed of the absolute difference between pipe temperature and air-conditioner and outdoor liquid pipe temperature
The comparison of the minima of value, and by the absolute difference between current indoor return air temperature and the antifreeze junction temperature of current indoor and this sky
Adjust the comparison of the minima of absolute difference between the indoor return air temperature when coolant is not revealed for the device and indoor antifreeze junction temperature, thus
Just can determine that air-conditioner whether coolant leakage, it is to avoid air-conditioner cannot built in pressure sensor or low pressure switch, no
The problem of coolant detection can be carried out so that air-conditioner can detect coolant leakage, protect compressor in secondary refrigerant leakage not by
Damage, reduces the maintenance cost of air-conditioner, improves the motility that air-conditioner detects coolant leakage.
Embodiments of the invention provide the decision maker that a kind of air-conditioner coolant is revealed, as shown in Fig. 2 this device 2 includes：
Acquisition module 21 and determination module 22, wherein：
Acquisition module 21, for obtaining the current outdoor ambient temperature of air-conditioner, current outdoor liquid pipe temperature, current indoor
Return air temperature and the antifreeze junction temperature of current indoor.
Determination module 22, for the current outdoor ambient temperature that obtained according to acquisition module 21 and current outdoor liquid pipe temperature
Between absolute difference and the difference between the first predetermined threshold, and the current indoor return air temperature that obtains of acquisition module 21 and current
Absolute difference between indoor antifreeze junction temperature and the difference between the second predetermined threshold, judge whether the coolant in air-conditioner is let out
Dew.
Wherein, the first above-mentioned predetermined threshold is the outdoor environment temperature when coolant is not revealed for the air-conditioner and outdoor liquid pipe
The minima of absolute difference between temperature, the second above-mentioned predetermined threshold is the indoor return air temperature when coolant is not revealed for the air-conditioner
The minima of absolute difference and between indoor antifreeze junction temperature.
Optionally, as shown in Fig. 2 this device 2 also includes：Control module 23, wherein：
Control module 23, for controlling air-conditioner to shut down, and restarts.
Acquisition module 21, be additionally operable to reacquire the current outdoor ambient temperature of air-conditioner, current outdoor liquid pipe temperature, when
Return air temperature and the antifreeze junction temperature of current indoor in cup.
Determination module 22, is additionally operable to current outdoor ambient temperature and the current outdoor liquid reacquiring according to acquisition module 21
Difference between the absolute difference between pipe temperature and the first predetermined threshold and the current indoor return air of acquisition module 21 reacquisition
Absolute difference between temperature and the antifreeze junction temperature of current indoor and the difference between the second predetermined threshold, judge in air-conditioner again
Whether coolant is revealed.
Optionally, determination module 22 specifically for：When acquisition module 21 obtain current outdoor ambient temperature and work as cup
Absolute difference between outer liquid pipe temperature and the difference between the first predetermined threshold are less than 0, and the current indoor that acquisition module 21 obtains
When absolute difference between return air temperature and the antifreeze junction temperature of current indoor and the difference between the second predetermined threshold are less than 0, judge empty
Adjust device secondary refrigerant leakage.
Further alternative, determination module 22 is in the current outdoor ambient temperature obtaining when acquisition module 21 and current outdoor
Difference between the absolute difference between liquid pipe temperature and the first predetermined threshold is less than 0, and the current indoor that acquisition module 21 obtains returns
When absolute difference between air temperature and the antifreeze junction temperature of current indoor and the difference between the second predetermined threshold are less than 0, judge air-conditioning
During device secondary refrigerant leakage specifically for：When between the current outdoor ambient temperature that acquisition module 21 obtains and current outdoor liquid pipe temperature
Difference between absolute difference and the first predetermined threshold is less than 0 and the current indoor return air temperature that obtains of acquisition module 21 and currently
Absolute difference between indoor antifreeze junction temperature and the difference between the second predetermined threshold are less than 0, and all continue the first predetermined amount of time
When, then judge that air-conditioner coolant is revealed.
Wherein, the first above-mentioned predetermined threshold is not revealed in coolant for air-conditioner and outdoor environment temperature is in extreme temperature
The minima of absolute difference between outdoor environment temperature during scope and outdoor liquid pipe temperature, the second above-mentioned predetermined threshold is air-conditioning
The indoor return air temperature when coolant is not revealed and outdoor environment temperature is in extreme temperature range for the device and indoor antifreeze junction temperature
Between absolute difference minima.
The decision maker that air-conditioner coolant provided in an embodiment of the present invention is revealed, because the coolant in the liquid pipe of air-conditioner is sent out
The disappearance of the coolant in liquid pipe during raw leakage so that absolute difference between outdoor environment temperature and outdoor liquid pipe temperature and
Coolant in the liquid pipe of air-conditioner for the absolute difference of indoor return air temperature and indoor antifreeze junction temperature occurs during leakage less than cold
Normal value when matchmaker does not leak, therefore, this device passes through to obtain current outdoor ambient temperature, the current outdoor liquid pipe temperature of air-conditioner
Degree, current indoor return air temperature and the antifreeze junction temperature of current indoor, then by current outdoor ambient temperature and current outdoor liquid
Absolute difference between outdoor environment temperature when coolant is not revealed of the absolute difference between pipe temperature and air-conditioner and outdoor liquid pipe temperature
The comparison of the minima of value, and by the absolute difference between current indoor return air temperature and the antifreeze junction temperature of current indoor and this sky
Adjust the comparison of the minima of absolute difference between the indoor return air temperature when coolant is not revealed for the device and indoor antifreeze junction temperature, thus
Just can determine that air-conditioner whether coolant leakage, it is to avoid air-conditioner cannot built in pressure sensor or low pressure switch, no
The problem of coolant detection can be carried out so that air-conditioner can detect coolant leakage, protect compressor in secondary refrigerant leakage not by
Damage, reduces the maintenance cost of air-conditioner, improves the motility that air-conditioner detects coolant leakage.
It should be noted that during implementing, each step in above-mentioned method flow as shown in Figure 1 is all permissible
Realized by the computer executed instructions of the software form of storage in the computing device memorizer of example, in hardware, for avoiding weight
Multiple, here is omitted.And the program corresponding to the action performed by said apparatus all can be stored in this dress in a software form
In the memorizer put, call the execution corresponding operation of above modules in order to processor.
Memorizer above can include volatile memory (volatile memory), such as random access memory
Device (random-access memory, RAM)；Nonvolatile memory (non-volatile memory), example can also be included
As read only memory (read-only memory, ROM), flash memory (flash memory), hard disk (hard disk
Drive, HDD) or solid state hard disc (solid-state drive, SSD)；The combination of the memorizer of mentioned kind can also be included.
Processor in device presented above can be the system of a processor or multiple treatment element
Claim.For example, processor can be central processing unit (central processing unit, CPU；Can also be other general places
Reason device, digital signal processor (digital signal processing, DSP), special IC (application
Specific integrated circuit, ASIC), field programmable gate array (field-programmable gate
Array, FPGA) or other PLDs, discrete gate or transistor logic, discrete hardware components etc..Logical
With processor can be microprocessor or this processor can also be any conventional processor etc.；Can also be dedicated processes
Device, this application specific processor can include at least one of baseband processing chip, radio frequency processing chip etc..
Those skilled in the art can be understood that, for convenience and simplicity of description, the device of foregoing description
With the specific work process of module, may be referred to the corresponding process in preceding method embodiment, will not be described here.
It should be understood that disclosed apparatus and method in several embodiments provided herein, can be passed through it
Its mode is realized.For example, device embodiment described above is only schematically, for example, the division of described module, and only
It is only a kind of division of logic function, actual can have other dividing mode when realizing, and for example multiple module or components can be tied
Close or be desirably integrated into another system, or some features can be ignored, or do not execute.Another, shown or discussed
Coupling each other or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of device or unit or logical
Letter connects, and can be electrical, mechanical or other forms.
The described module illustrating as separating component can be or may not be physically separate, show as module
The part showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.The mesh to realize this embodiment scheme for some or all of unit therein can be selected according to the actual needs
's.
In addition, can be integrated in a processing unit in each functional unit in each embodiment of the present invention it is also possible to
It is that the independent physics of unit is included it is also possible to two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be to be realized in the form of hardware, it would however also be possible to employ the form that hardware adds SFU software functional unit is realized.
Finally it should be noted that：Above example only in order to technical scheme to be described, is not intended to limit；Although
With reference to the foregoing embodiments the present invention is described in detail, it will be understood by those within the art that：It still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. the decision method that a kind of air-conditioner coolant is revealed is it is characterised in that include：
Obtain the current outdoor ambient temperature of described air-conditioner, current outdoor liquid pipe temperature, current indoor return air temperature and work as
Antifreeze junction temperature in cup；
According to the absolute difference between described current outdoor ambient temperature and described current outdoor liquid pipe temperature and the first predetermined threshold
Between difference, and the absolute difference between described current indoor return air temperature and the antifreeze junction temperature of described current indoor is pre- with second
Determine the difference between threshold value, judge whether the coolant in described air-conditioner is revealed；
Wherein, described first predetermined threshold is the outdoor environment temperature when coolant is not revealed for the described air-conditioner and outdoor liquid pipe temperature
The minima of absolute difference between degree, described second predetermined threshold is the indoor return air temperature when coolant is not revealed for the described air-conditioner
The minima of absolute difference and between indoor antifreeze junction temperature.
2. method according to claim 1 is it is characterised in that when determining described air-conditioner coolant and revealing, described side
Method also includes：
Control described air-conditioner to shut down, and restart；
Reacquire the current outdoor ambient temperature of described air-conditioner, current outdoor liquid pipe temperature, current indoor return air temperature with
And the antifreeze junction temperature of current indoor；
Pre- with described first according to the absolute difference between the current outdoor ambient temperature reacquiring and current outdoor liquid pipe temperature
Determine the absolute difference between the current indoor return air temperature of difference between threshold value and reacquisition and the antifreeze junction temperature of current indoor
Difference and between described second predetermined threshold, judges whether the coolant in described air-conditioner is revealed again.
3. method according to claim 1 is it is characterised in that according to described current outdoor ambient temperature and described work as cup
Absolute difference between outer liquid pipe temperature and the difference between the first predetermined threshold, and described current indoor return air temperature and described work as
Difference between the absolute difference between antifreeze junction temperature and the second predetermined threshold in cup, whether the coolant in the described air-conditioner of judgement
Leakage is occurred to specifically include：
Absolute difference when between described current outdoor ambient temperature and described current outdoor liquid pipe temperature and described first predetermined threshold
Difference between value be less than absolute difference between 0, and described current indoor return air temperature and the antifreeze junction temperature of described current indoor with
When difference between the second predetermined threshold is less than 0, judge that described air-conditioner coolant is revealed.
4. method according to claim 3 is it is characterised in that described when described current outdoor ambient temperature and described current
Absolute difference between outdoor liquid pipe temperature and the difference between described first predetermined threshold are less than 0, and described current indoor return air temperature
When absolute difference between degree and the antifreeze junction temperature of described current indoor and the difference between the second predetermined threshold are less than 0, judge described
Air-conditioner coolant is revealed and is specifically included：
Absolute difference when between described current outdoor ambient temperature and described current outdoor liquid pipe temperature and described first predetermined threshold
Difference between value be less than absolute difference between 0 and described current indoor return air temperature and the antifreeze junction temperature of described current indoor with
Difference between the second predetermined threshold is less than 0, and when all continuing the first predetermined amount of time, then judges that described air-conditioner coolant is revealed.
5. the method according to any one of claim 1-4 is it is characterised in that described first predetermined threshold is described air-conditioner
Outdoor environment temperature when coolant is not revealed and described outdoor environment temperature is in extreme temperature range and outdoor liquid pipe temperature
Between absolute difference minima, described second predetermined threshold do not reveal and described outdoor environment temperature in coolant for described air-conditioner
It is in the minima of absolute difference between indoor return air temperature during extreme temperature range and indoor antifreeze junction temperature.
6. the decision maker that a kind of air-conditioner coolant is revealed is it is characterised in that this device includes：
Acquisition module, for obtaining the current outdoor ambient temperature of described air-conditioner, current outdoor liquid pipe temperature, current indoor return
Air temperature and the antifreeze junction temperature of current indoor；
Determination module, for the described current outdoor ambient temperature that obtained according to described acquisition module and described current outdoor liquid pipe
Difference between the absolute difference between temperature and the first predetermined threshold, and the described current indoor return air that described acquisition module obtains
Absolute difference between temperature and the antifreeze junction temperature of described current indoor and the difference between the second predetermined threshold, judge described air-conditioner
In coolant whether reveal；
Wherein, described first predetermined threshold is the outdoor environment temperature when coolant is not revealed for the described air-conditioner and outdoor liquid pipe temperature
The minima of absolute difference between degree, described second predetermined threshold is the indoor return air temperature when coolant is not revealed for the described air-conditioner
The minima of absolute difference and between indoor antifreeze junction temperature.
7. device according to claim 6 is it is characterised in that described device also includes：
Control module, for controlling described air-conditioner to shut down, and restarts；
Described acquisition module, be additionally operable to reacquire the current outdoor ambient temperature of described air-conditioner, current outdoor liquid pipe temperature,
Current indoor return air temperature and the antifreeze junction temperature of current indoor；
Described determination module, is additionally operable to current outdoor ambient temperature and the current outdoor liquid reacquiring according to described acquisition module
What the absolute difference between pipe temperature and the difference between described first predetermined threshold and described acquisition module reacquired works as cup
Absolute difference between interior return air temperature and the antifreeze junction temperature of current indoor and the difference between described second predetermined threshold, judge again
Whether the coolant in described air-conditioner is revealed.
8. device according to claim 6 it is characterised in that described determination module specifically for：
Absolute difference when between the described current outdoor ambient temperature that described acquisition module obtains and described current outdoor liquid pipe temperature
Value and described first predetermined threshold between difference be less than 0, and described acquisition module obtain described current indoor return air temperature and
When absolute difference between the antifreeze junction temperature of described current indoor and the difference between the second predetermined threshold are less than 0, judge described air-conditioning
Device secondary refrigerant leakage.
9. device according to claim 8 is it is characterised in that described determination module is in the institute obtaining when described acquisition module
State the absolute difference between current outdoor ambient temperature and described current outdoor liquid pipe temperature and the difference between described first predetermined threshold
Value is less than between 0, and the described current indoor return air temperature of described acquisition module acquisition and the antifreeze junction temperature of described current indoor
When difference between absolute difference and the second predetermined threshold is less than 0, when judging that described air-conditioner coolant is revealed specifically for：
Absolute difference when between the described current outdoor ambient temperature that described acquisition module obtains and described current outdoor liquid pipe temperature
Value and described first predetermined threshold between difference be less than 0 and described acquisition module obtain described current indoor return air temperature and
Absolute difference between the antifreeze junction temperature of described current indoor and the difference between the second predetermined threshold are less than 0, and it is pre- all to continue first
When fixing time section, then judge that described air-conditioner coolant is revealed.
10. the device according to any one of claim 6-9 is it is characterised in that described first predetermined threshold is described air-conditioning
The outdoor environment temperature when coolant is not revealed and described outdoor environment temperature is in extreme temperature range for the device and outdoor liquid pipe temperature
The minima of absolute difference between degree, described second predetermined threshold is not revealed and described outdoor environment temperature in coolant for described air-conditioner
Degree is in the minima of absolute difference between indoor return air temperature during extreme temperature range and indoor antifreeze junction temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610814720.0A CN106403173B (en) | 2016-09-09 | 2016-09-09 | A kind of determination method and device of air-conditioner coolant leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610814720.0A CN106403173B (en) | 2016-09-09 | 2016-09-09 | A kind of determination method and device of air-conditioner coolant leakage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106403173A true CN106403173A (en) | 2017-02-15 |
| CN106403173B CN106403173B (en) | 2019-10-11 |
Family
ID=57998994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610814720.0A Active CN106403173B (en) | 2016-09-09 | 2016-09-09 | A kind of determination method and device of air-conditioner coolant leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106403173B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895561A (en) * | 2017-02-28 | 2017-06-27 | 广东美的制冷设备有限公司 | A kind of method, control device and air-conditioner of air-conditioner for detecting air-conditioner coolant leakage |
| CN107525208A (en) * | 2017-07-10 | 2017-12-29 | 珠海格力电器股份有限公司 | Lack of fluorine of air-conditioners detection method and device |
| CN108444046A (en) * | 2018-02-14 | 2018-08-24 | 青岛海尔空调器有限总公司 | Indoor unit anti-freeze control method for air conditioner |
| CN108583208A (en) * | 2018-05-16 | 2018-09-28 | 珠海格力电器股份有限公司 | Air-conditioning duct state determines method, apparatus and system |
| JPWO2019038797A1 (en) * | 2017-08-21 | 2020-03-26 | 三菱電機株式会社 | Air conditioner and expansion valve unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08226732A (en) * | 1995-02-20 | 1996-09-03 | Matsushita Electric Ind Co Ltd | Air conditioning equipment |
| CN1755341A (en) * | 2004-09-29 | 2006-04-05 | 乐金电子(天津)电器有限公司 | Cold media leakage detection apparatus for air conditioner and detection method thereof |
| CN1888644A (en) * | 2005-06-27 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Air conditioner refrigerant leakaging sensing method |
| CN104949278A (en) * | 2015-06-25 | 2015-09-30 | 海信（山东）空调有限公司 | Method and device for detecting refrigerant leakage of air conditioner and air-conditioning device |
-
2016
- 2016-09-09 CN CN201610814720.0A patent/CN106403173B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08226732A (en) * | 1995-02-20 | 1996-09-03 | Matsushita Electric Ind Co Ltd | Air conditioning equipment |
| CN1755341A (en) * | 2004-09-29 | 2006-04-05 | 乐金电子(天津)电器有限公司 | Cold media leakage detection apparatus for air conditioner and detection method thereof |
| CN1888644A (en) * | 2005-06-27 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Air conditioner refrigerant leakaging sensing method |
| CN104949278A (en) * | 2015-06-25 | 2015-09-30 | 海信（山东）空调有限公司 | Method and device for detecting refrigerant leakage of air conditioner and air-conditioning device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895561A (en) * | 2017-02-28 | 2017-06-27 | 广东美的制冷设备有限公司 | A kind of method, control device and air-conditioner of air-conditioner for detecting air-conditioner coolant leakage |
| CN106895561B (en) * | 2017-02-28 | 2019-07-30 | 广东美的制冷设备有限公司 | It is a kind of detection air-conditioner coolant leakage method, air conditioner control device and air conditioner |
| CN107525208A (en) * | 2017-07-10 | 2017-12-29 | 珠海格力电器股份有限公司 | Lack of fluorine of air-conditioners detection method and device |
| JPWO2019038797A1 (en) * | 2017-08-21 | 2020-03-26 | 三菱電機株式会社 | Air conditioner and expansion valve unit |
| CN108444046A (en) * | 2018-02-14 | 2018-08-24 | 青岛海尔空调器有限总公司 | Indoor unit anti-freeze control method for air conditioner |
| CN108583208A (en) * | 2018-05-16 | 2018-09-28 | 珠海格力电器股份有限公司 | Air-conditioning duct state determines method, apparatus and system |
| CN108583208B (en) * | 2018-05-16 | 2023-08-25 | 珠海格力电器股份有限公司 | Air conditioner air duct state determining method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106403173B (en) | 2019-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106403173A (en) | Method and device for judging refrigerant leakage of air conditioner | |
| CN106642555A (en) | Judgment method and device for air-conditioner refrigerant leakage | |
| CN107314519A (en) | A kind of decision method and device of air-conditioner coolant leakage | |
| CN108050663B (en) | Control method and device for self-protection of compressor, air conditioner and storage medium | |
| CN110895023B (en) | Air conditioner refrigerant leakage detection method and air conditioner | |
| US11644206B2 (en) | HVAC system prognostics and diagnostics based on temperature rise or drop | |
| CN108397876A (en) | The detection method and device of air conditioner coolant state | |
| CN110645671A (en) | Air conditioner high temperature prevention control method and device and air conditioner | |
| US11788753B2 (en) | HVAC system fault prognostics and diagnostics | |
| US11639803B2 (en) | System and method for identifying causes of HVAC system faults | |
| US11193685B2 (en) | System and method for distinguishing HVAC system faults | |
| CN108488997A (en) | Air conditioner and its control method and computer readable storage medium | |
| CN105674507A (en) | Method and device for detecting refrigerants of air conditioner | |
| JP6177218B2 (en) | Air conditioner | |
| CN106352487A (en) | Control method of air conditioner and air conditioner | |
| CN111720975A (en) | Control method, system and device of air conditioner | |
| CN111550906A (en) | Anti-freezing control method for indoor unit of air conditioner and air conditioner | |
| JP6146606B2 (en) | Air conditioner | |
| CN110470003B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| CN113970163A (en) | Air conditioner and refrigerant leakage detection method and device thereof, and readable storage medium | |
| CN105509250B (en) | The stifled detection method of air-conditioning system oil and detection means, air conditioner | |
| WO2021234854A1 (en) | Refrigeration cycle device | |
| CN113932371B (en) | Air conditioner fluorine deficiency protection method and device and air conditioner | |
| CN116753593A (en) | Protection method and device for heating prevention and high temperature and heating lack refrigerant and air conditioning system | |
| CN115789985A (en) | Air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |