CN105928156A - Refrigerant leak detection method and device and air conditioner - Google Patents
Refrigerant leak detection method and device and air conditioner Download PDFInfo
- Publication number
- CN105928156A CN105928156A CN201610319177.7A CN201610319177A CN105928156A CN 105928156 A CN105928156 A CN 105928156A CN 201610319177 A CN201610319177 A CN 201610319177A CN 105928156 A CN105928156 A CN 105928156A
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- Prior art keywords
- temperature
- conditioner
- air
- delivery temperature
- running frequency
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Classifications
-
- 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
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- 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
- F24F11/30—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
- F24F11/52—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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
Abstract
The invention provides a refrigerant leak detection method and device and an air conditioner. The refrigerant leak detection method includes the steps that the real-time gas exhaust temperature of a compressor of the air conditioner is detected; according to the work condition and the running state of the air conditioner, the theoretical gas exhaust temperature of the compressor is determined; and according to the real-time gas exhaust temperature and the theoretical gas exhaust temperature, whether refrigerants in the air conditioner leak or not is determined. By means of the technical scheme, whether the refrigerants in the air conditioner leak or not can be detected, and harm to the air conditioner and potential safety hazards brought to users because of refrigerant leakage are avoided as far as possible.
Description
Technical field
The present invention relates to air-conditioner technical field, in particular to a kind of coolant leakage detection side
Method, a kind of coolant leakage detection device and a kind of air-conditioner.
Background technology
Cold-producing medium (i.e. coolant) conventional in multi-split air conditioner has R22 and R410A, these systems
Cryogen itself is safety non-toxic, noninflammable, but if the refrigerant charging roomful revealed can cause
User suffocates, and there is great potential safety hazard, and to this, there are rule in plain text in China and other multiple countries
Fixed, when occurring to leak, cold-producing medium effusion concentration limit in room is 0.4kg/m3.
It addition, the cold-producing medium in air-conditioner is once revealed, if can not find in time, not only result in sky
Adjust device refrigeration, heating efficiency sharp-decay, also can have a strong impact on and even damage compressor, increase compression
The maintenance rate of machine.
Therefore, how leakage whether can be occurred to become urgently to be resolved hurrily by the coolant in Intelligent Measurement air-conditioner
Technical problem.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art or correlation technique.
To this end, it is an object of the present invention to propose a kind of new coolant leakage detection scheme, energy
Whether enough coolant in detection air-conditioner leak, and are avoided as much as because coolant leakage is to air-conditioner
The potential safety hazard caused damage and bring to user.
Further object is that and propose a kind of air-conditioner.
For achieving the above object, embodiment according to the first aspect of the invention, it is proposed that a kind of coolant
Leakage detection method, including: the real time exhaust gas temperature of the compressor of detection air-conditioner；According to described sky
Adjust operating mode and the running status of device, determine the theoretical delivery temperature of described compressor；According to described in real time
Delivery temperature and described theoretical delivery temperature, determine whether the coolant in described air-conditioner leaks.
Coolant leakage detection method according to an embodiment of the invention, the real time exhaust gas temperature of compressor can
Detected by the temperature sensor being arranged on air-conditioner or other modes, the theoretical aerofluxus of compressor
Temperature can be according to the operating mode (outdoor environment temperature etc. as residing) of air-conditioner and running status (such as pressure
The running frequency etc. of contracting machine) determine, owing to the coolant in air-conditioner once leaks, compressor
Delivery temperature have bigger fluctuation, namely the delivery temperature relative theory delivery temperature meeting of compressor
Have relatively large deviation, can according to the real time exhaust gas temperature of compressor and the theoretical delivery temperature determined, and
Time determine whether the coolant in air-conditioner leaks so that air-conditioner has possessed and has detected according to delivery temperature
The function whether coolant leaks, carries out perfect to the function of air-conditioner further, and is avoided as much as
Because air-conditioner is caused damage by coolant leakage, improve the self-protection ability of air-conditioner, the most also
Avoid the potential safety hazard brought because of coolant leakage to user.
Coolant leakage detection method according to the abovementioned embodiments of the present invention, it is also possible to there is techniques below
Feature:
According to one embodiment of present invention, according to described real time exhaust gas temperature and described theoretical aerofluxus temperature
Degree, determine the step whether coolant in described air-conditioner leaks, specifically include: judge described in real time
Whether difference between delivery temperature and described theoretical delivery temperature and the ratio of described theoretical delivery temperature
More than or equal to first threshold；Judging between described real time exhaust gas temperature and described theoretical delivery temperature
Difference and the ratio of described theoretical delivery temperature more than or equal to described first threshold time, determine described
Coolant leakage in air-conditioner；And judging described real time exhaust gas temperature and described theoretical delivery temperature
Between difference and the ratio of described theoretical delivery temperature less than described first threshold time, determine described sky
The coolant in device is adjusted not leak.
Coolant detection method according to an embodiment of the invention, by judging that real time exhaust gas temperature is with theoretical
The ratio of the difference between delivery temperature and theoretical delivery temperature whether more than or equal to first threshold (as
15%, first threshold can be adjusted according to the actual requirements), if it is determined that real time exhaust gas temperature is with theoretical
The ratio of the difference between delivery temperature and theoretical delivery temperature more than or equal to first threshold, then illustrates
Real time exhaust gas temperature relative theory delivery temperature deviation is bigger, it may be determined that now the coolant in air-conditioner is sent out
Raw leakage, if it is determined that the difference between real time exhaust gas temperature and theoretical delivery temperature and theoretical delivery temperature
Ratio less than first threshold, then explanation real time exhaust gas temperature relative theory delivery temperature deviation is rationally
In the range of, it may be determined that now the coolant in air-conditioner leaks.
According to one embodiment of present invention, described real time exhaust gas temperature and described theoretical aerofluxus are being judged
The ratio of difference between temperature and described theoretical delivery temperature is more than or equal to the step of described first threshold
After Zhou, and before the step of the coolant leakage in determining described air-conditioner, also include: by institute
The electric expansion valve stating air-conditioner increases to predetermined aperture；Record described compressor respectively at described electronics
Expansion valve increases to the first running frequency before and after described predetermined aperture and the second running frequency；Judge institute
State the difference between the second running frequency and described first running frequency and the ratio of described first running frequency
Whether value is more than or equal to Second Threshold；Judging that described second running frequency runs frequency with described first
When difference between rate and the ratio of described first running frequency are more than or equal to described Second Threshold, hold
Row determines the step of the coolant leakage in described air-conditioner.
Coolant leakage detection method according to an embodiment of the invention, in the actual moving process of air-conditioner
In, affect delivery temperature a lot of because have, so judging real time exhaust gas temperature and reason of compressor
After being more than or equal to first threshold by the ratio of the difference between delivery temperature and theoretical delivery temperature,
Also need to carry out further detecting the accuracy improving coolant leakage detection, specifically, by by sky
The electric expansion valve (this electric expansion valve is used for controlling cold medium flux in air-conditioner) adjusting device increases to pre-
Determine aperture, and the recording compressed machine the first fortune before and after electric expansion valve increases to predetermined aperture respectively
Line frequency and the second running frequency, and in the difference judged between the second running frequency and the first running frequency
(such as 15%, Second Threshold can basis more than or equal to Second Threshold for the ratio of value and the first running frequency
Actual demand is adjusted), just determine that the coolant in air-conditioner leaks, if it is determined that second runs
Difference and the ratio of the first running frequency between frequency and the first running frequency are less than Second Threshold, say
The change of bright delivery temperature is not likely to be and is caused by coolant leakage, now determines the coolant in air-conditioner
Do not leak, improve the accuracy of coolant leakage detection.
According to one embodiment of present invention, according to operating mode and the running status of described air-conditioner, determine
The step of the theoretical delivery temperature of described compressor, specifically includes: detection outdoor environment temperature, described
The temperature of the outdoor heat exchanger outlet of air-conditioner and the running frequency of described compressor；According to described room
The temperature of external environment temperature, described outdoor heat exchanger outlet and the running frequency of described compressor, meter
Calculate described theoretical delivery temperature.
Coolant leakage detection method according to an embodiment of the invention, it is contemplated that in the actual fortune of air-conditioner
During row, the operating mode (referring mainly to outdoor environment temperature) of air-conditioner and running status (refer mainly to room
The temperature of external heat exchanger outlet and the running frequency of compressor) etc. factor all can affect the row of compressor
Temperature, so comprehensive outdoor environment temperature, the temperature of outdoor heat exchanger outlet and the fortune of compressor
The many factors such as line frequency calculate the theoretical delivery temperature of compressor, it is ensured that result of calculation accurate
Property, think that the accuracy of coolant leakage testing result provides safeguard.
According to one embodiment of present invention, according to the described theoretical delivery temperature of below equation calculating:
TP=a+b × Te+c×Th+d×Fi；
Wherein, TPFor described theoretical delivery temperature, TeFor described outdoor environment temperature, ThFor described
The temperature of outdoor heat exchanger outlet, FiFor the running frequency of described compressor, a, b, c, d are all normal
Number.
Coolant leakage detection method according to an embodiment of the invention, by above-mentioned formula computational theory
T during delivery temperature, in formulae、Th、FiBeing all numerical value, a, b, c, d can be according to skies
Specific performance and the design requirement of adjusting device obtain.
According to one embodiment of present invention, also include: the coolant leakage in determining described air-conditioner
Time, carry out alarm by following arbitrary or various ways: voice mode, graphics context mode, luminescence
Mode；And/or send control instruction to designated equipment, carry out warning and carry controlling described designated equipment
Show.
Coolant leakage detection method according to an embodiment of the invention, the coolant in determining air-conditioner is let out
During leakage, can point out to user in time, specifically, air-conditioner is (as empty in passed through self by voice
Adjust the speaker etc. arranged on device to carry out voice message), picture and text are (as aobvious by arrange on air-conditioner
The display graph text information such as display screen), luminous (as the LED etc. by controlling to arrange on air-conditioner is entered
Row luminous prompting) etc. various ways point out to user, or also can be directly to designated equipment (user
Use with air-conditioner to the mobile device being associated, wearable device etc.) send control instruction, with
Controlling designated equipment and carry out alarm so that coolant leakage once detected, no matter user is near empty
Adjust device or can know in time away from air-conditioner, in order to user uses relevant emergency measure, drops further
Low infringement air-conditioner caused because of coolant leakage, wherein, the mode carrying out alarm include but
It is not limited to above-mentioned voice mode, graphics context mode, illumination mode.
Embodiment according to the second aspect of the invention, it is proposed that a kind of coolant leakage detection device, bag
Include: temperature detecting unit, for detecting the real time exhaust gas temperature of the compressor of air-conditioner；First determines
Unit, for the operating mode according to described air-conditioner and running status, determines the theoretical row of described compressor
Temperature；Leak detection unit, for according to described real time exhaust gas temperature and described theoretical aerofluxus temperature
Degree, determines whether the coolant in described air-conditioner leaks.
Coolant leakage detection device according to an embodiment of the invention, the real time exhaust gas temperature of compressor can
Detected by the temperature sensor being arranged on air-conditioner or other modes, the theoretical aerofluxus of compressor
Temperature can be according to the operating mode (outdoor environment temperature etc. as residing) of air-conditioner and running status (such as pressure
The running frequency etc. of contracting machine) determine, owing to the coolant in air-conditioner once leaks, compressor
Delivery temperature have bigger fluctuation, namely the delivery temperature relative theory delivery temperature meeting of compressor
Have relatively large deviation, can according to the real time exhaust gas temperature of compressor and the theoretical delivery temperature determined, and
Time determine whether the coolant in air-conditioner leaks so that air-conditioner has possessed and has detected according to delivery temperature
The function whether coolant leaks, carries out perfect to the function of air-conditioner further, and is avoided as much as
Because air-conditioner is caused damage by coolant leakage, improve the self-protection ability of air-conditioner, the most also
Avoid the potential safety hazard brought because of coolant leakage to user.
Coolant leakage detection device according to the abovementioned embodiments of the present invention, it is also possible to there is techniques below
Feature:
According to one embodiment of present invention, described leak detection unit includes: the first judging unit,
For judging the difference between described real time exhaust gas temperature and described theoretical delivery temperature and described theoretical row
Whether the ratio of temperature is more than or equal to first threshold；Second determines unit, for described first
Judging unit judges the difference between described real time exhaust gas temperature and described theoretical delivery temperature and described reason
When the ratio of opinion delivery temperature is more than or equal to described first threshold, determine the coolant in described air-conditioner
Leakage, and in the difference judged between described real time exhaust gas temperature and described theoretical delivery temperature and institute
When stating the ratio of theoretical delivery temperature less than described first threshold, determine the coolant in described air-conditioner not
Leakage.
According to an embodiment of the invention coolant leakage detection device, by judge real time exhaust gas temperature and
Whether difference and the ratio of theoretical delivery temperature between theoretical delivery temperature are more than or equal to first threshold
(such as 15%, first threshold can be adjusted according to the actual requirements), if it is determined that real time exhaust gas temperature with
Difference and the ratio of theoretical delivery temperature between theoretical delivery temperature are more than or equal to first threshold, then
Illustrate that real time exhaust gas temperature relative theory delivery temperature deviation is bigger, it may be determined that now cold in air-conditioner
Matchmaker leaks, if it is determined that the difference between real time exhaust gas temperature and theoretical delivery temperature and theoretical aerofluxus
The ratio of temperature is less than first threshold, then explanation real time exhaust gas temperature relative theory delivery temperature deviation exists
In zone of reasonableness, it may be determined that now the coolant in air-conditioner leaks.
According to one embodiment of present invention, also include: adjustment unit, for judging described first
Unit judges the difference between described real time exhaust gas temperature and described theoretical delivery temperature and described theoretical row
When the ratio of temperature is more than or equal to described first threshold, the electric expansion valve of described air-conditioner is increased
Big to predetermined aperture；Record unit, increases at described electric expansion valve for recording described compressor respectively
The first running frequency before and after big extremely described predetermined aperture and the second running frequency；Described Leak Detection list
Unit also includes: the second judging unit, is used for judging that described second running frequency runs frequency with described first
Whether difference and the ratio of described first running frequency between rate are more than or equal to Second Threshold；Described
Second determine unit specifically for, judge described second running frequency and institute at described second judging unit
State the ratio of the difference between the first running frequency and described first running frequency more than or equal to described the
During two threshold values, determine the coolant leakage in described air-conditioner.
Coolant leakage detection device according to an embodiment of the invention, in the actual moving process of air-conditioner
In, affect delivery temperature a lot of because have, so judging real time exhaust gas temperature and reason of compressor
After being more than or equal to first threshold by the ratio of the difference between delivery temperature and theoretical delivery temperature,
Also need to carry out further detecting the accuracy improving coolant leakage detection, specifically, by by sky
The electric expansion valve (this electric expansion valve is used for controlling cold medium flux in air-conditioner) adjusting device increases to pre-
Determine aperture, and the recording compressed machine the first fortune before and after electric expansion valve increases to predetermined aperture respectively
Line frequency and the second running frequency, and in the difference judged between the second running frequency and the first running frequency
(such as 15%, Second Threshold can basis more than or equal to Second Threshold for the ratio of value and the first running frequency
Actual demand is adjusted), just determine that the coolant in air-conditioner leaks, if it is determined that second runs
Difference and the ratio of the first running frequency between frequency and the first running frequency are less than Second Threshold, say
The change of bright delivery temperature is not likely to be and is caused by coolant leakage, now determines the coolant in air-conditioner
Do not leak, improve the accuracy of coolant leakage detection.
According to one embodiment of present invention, described first determines that unit is specifically for sensing chamber's outer shroud
Border temperature, the temperature that the outdoor heat exchanger of described air-conditioner exports and the operation frequency of described compressor
Rate；According to described outdoor environment temperature, the temperature of described outdoor heat exchanger outlet and described compressor
Running frequency, calculate described theoretical delivery temperature.
Coolant leakage detection device according to an embodiment of the invention, it is contemplated that in the actual fortune of air-conditioner
During row, the operating mode (referring mainly to outdoor environment temperature) of air-conditioner and running status (refer mainly to room
The temperature of external heat exchanger outlet and the running frequency of compressor) etc. factor all can affect the row of compressor
Temperature, so comprehensive outdoor environment temperature, the temperature of outdoor heat exchanger outlet and the fortune of compressor
The many factors such as line frequency calculate the theoretical delivery temperature of compressor, it is ensured that result of calculation accurate
Property, think that the accuracy of coolant leakage testing result provides safeguard.
According to one embodiment of present invention, described first determine unit specifically for, according to following public affairs
The described theoretical delivery temperature of formula calculating:
TP=a+b × Te+c×Th+d×Fi；
Wherein, TPFor described theoretical delivery temperature, TeFor described outdoor environment temperature, ThFor described
The temperature of outdoor heat exchanger outlet, FiFor the running frequency of described compressor, a, b, c, d are all normal
Number.
Coolant leakage detection device according to an embodiment of the invention, by above-mentioned formula computational theory
T during delivery temperature, in formulae、Th、FiBeing all numerical value, a, b, c, d can be according to skies
Specific performance and the design requirement of adjusting device obtain.
According to one embodiment of present invention, also include: Tip element, for determining described air-conditioning
During coolant leakage in device, carry out alarm by following arbitrary or various ways: voice mode,
Graphics context mode, illumination mode；And/or transmitting element, for sending control instruction to designated equipment,
Alarm is carried out with the described designated equipment of control.
Coolant leakage detection device according to an embodiment of the invention, the coolant in determining air-conditioner is let out
During leakage, can point out to user in time, specifically, air-conditioner is (as empty in passed through self by voice
Adjust the speaker etc. arranged on device to carry out voice message), picture and text are (as aobvious by arrange on air-conditioner
The display graph text information such as display screen), luminous (as the LED etc. by controlling to arrange on air-conditioner is entered
Row luminous prompting) etc. various ways point out to user, or also can be directly to designated equipment (user
Use with air-conditioner to the mobile device being associated, wearable device etc.) send control instruction, with
Controlling designated equipment and carry out alarm so that coolant leakage once detected, no matter user is near empty
Adjust device or can know in time away from air-conditioner, in order to user uses relevant emergency measure, drops further
Low infringement air-conditioner caused because of coolant leakage, wherein, the mode carrying out alarm include but
It is not limited to above-mentioned voice mode, graphics context mode, illumination mode.
Embodiment according to the third aspect of the invention we, it is also proposed that a kind of air-conditioner, including: as above
State the coolant leakage detection device according to any one of embodiment.
The additional aspect of the present invention and advantage will part be given in the following description, and part will be from following
Description in become obvious, or recognized by the practice of the present invention.
Accompanying drawing explanation
Embodiment is retouched by the above-mentioned and/or additional aspect of the present invention and advantage from combining accompanying drawings below
Will be apparent from easy to understand in stating, wherein:
Fig. 1 shows the exemplary flow of coolant leakage detection method according to an embodiment of the invention
Figure；
Fig. 2 shows the schematic block diagram of coolant leakage detection device according to an embodiment of the invention；
Fig. 3 shows the schematic block diagram of air-conditioner according to an embodiment of the invention；
Fig. 4 shows the signal stream of coolant leakage detection method according to another embodiment of the invention
Cheng Tu.
Detailed description of the invention
In order to be more clearly understood that the above-mentioned purpose of the present invention, feature and advantage, below in conjunction with attached
The present invention is further described in detail by figure and detailed description of the invention.It should be noted that not
In the case of conflict, the feature in embodiments herein and embodiment can be mutually combined.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but,
The present invention can implement to use other to be different from other modes described here, therefore, and the present invention
Protection domain do not limited by following public specific embodiment.
Fig. 1 shows the exemplary flow of coolant leakage detection method according to an embodiment of the invention
Figure.
As it is shown in figure 1, coolant leakage detection method according to an embodiment of the invention, including:
Step 102, the real time exhaust gas temperature of the compressor of detection air-conditioner；
Step 104, according to operating mode and the running status of described air-conditioner, determines the reason of described compressor
Opinion delivery temperature；
Step 106, according to described real time exhaust gas temperature and described theoretical delivery temperature, determines described sky
Adjust whether the coolant in device leaks.
The real time exhaust gas temperature of compressor can be by the temperature sensor being arranged on air-conditioner or its other party
Formula detects, and the theoretical delivery temperature of compressor can be according to the operating mode of air-conditioner (such as residing outdoor ring
Border temperature etc.) and running status (such as the running frequency etc. of compressor) determine, due in air-conditioner
Coolant once leak, the delivery temperature of compressor has a bigger fluctuation, namely compressor
Delivery temperature relative theory delivery temperature has relatively large deviation, can be according to the real-time ventilation temperature of compressor
Degree and the theoretical delivery temperature determined, determine whether the coolant in air-conditioner leaks so that air-conditioning in time
Device has possessed and has detected the function whether coolant leaks, the further merit to air-conditioner according to delivery temperature
Can carry out perfect, and be avoided as much as, because air-conditioner is caused damage by coolant leakage, improve sky
Adjust the self-protection ability of device, it also avoid the potential safety hazard brought to user because of coolant leakage simultaneously.
Coolant leakage detection method according to the abovementioned embodiments of the present invention, it is also possible to there is techniques below
Feature:
According to one embodiment of present invention, according to described real time exhaust gas temperature and described theoretical aerofluxus temperature
Degree, determine the step whether coolant in described air-conditioner leaks, specifically include: judge described in real time
Whether difference between delivery temperature and described theoretical delivery temperature and the ratio of described theoretical delivery temperature
More than or equal to first threshold；Judging between described real time exhaust gas temperature and described theoretical delivery temperature
Difference and the ratio of described theoretical delivery temperature more than or equal to described first threshold time, determine described
Coolant leakage in air-conditioner；And judging described real time exhaust gas temperature and described theoretical delivery temperature
Between difference and the ratio of described theoretical delivery temperature less than described first threshold time, determine described sky
The coolant in device is adjusted not leak.
By judging difference between real time exhaust gas temperature and theoretical delivery temperature and theory delivery temperature
Ratio whether more than or equal to first threshold, (such as 15%, can adjust according to the actual requirements by first threshold
Whole), if it is determined that difference between real time exhaust gas temperature and theoretical delivery temperature and theory delivery temperature
Ratio is more than or equal to first threshold, then explanation real time exhaust gas temperature relative theory delivery temperature deviation is relatively
Greatly, it may be determined that now the coolant in air-conditioner leaks, if it is determined that real time exhaust gas temperature is arranged with theoretical
The ratio of the difference between temperature and theoretical delivery temperature less than first threshold, then illustrates real-time ventilation
Temperature relative theory delivery temperature deviation is in the reasonable scope, it may be determined that now the coolant in air-conditioner is not
Leak.
According to one embodiment of present invention, described real time exhaust gas temperature and described theoretical aerofluxus are being judged
The ratio of difference between temperature and described theoretical delivery temperature is more than or equal to the step of described first threshold
After Zhou, and before the step of the coolant leakage in determining described air-conditioner, also include: by institute
The electric expansion valve stating air-conditioner increases to predetermined aperture；Record described compressor respectively at described electronics
Expansion valve increases to the first running frequency before and after described predetermined aperture and the second running frequency；Judge institute
State the difference between the second running frequency and described first running frequency and the ratio of described first running frequency
Whether value is more than or equal to Second Threshold；Judging that described second running frequency runs frequency with described first
When difference between rate and the ratio of described first running frequency are more than or equal to described Second Threshold, hold
Row determines the step of the coolant leakage in described air-conditioner.
In the actual moving process of air-conditioner, affect delivery temperature a lot of because have of compressor,
So at the difference judged between real time exhaust gas temperature and theoretical delivery temperature and the ratio of theoretical delivery temperature
Value is more than or equal to after first threshold, in addition it is also necessary to carry out detection further to improve coolant leakage detection
Accuracy, specifically, by by the electric expansion valve of air-conditioner, (this electric expansion valve is used for controlling
Cold medium flux in air-conditioner) increase to predetermined aperture, and difference recording compressed machine is at electric expansion valve
Increase to the first running frequency before and after predetermined aperture and the second running frequency, and judge the second operation
Difference and the ratio of the first running frequency between frequency and the first running frequency are more than or equal to the second threshold
Value (such as 15%, Second Threshold can be adjusted according to the actual requirements), just determine in air-conditioner is cold
Matchmaker leaks, if it is determined that the difference and first between the second running frequency and the first running frequency is run
The ratio of frequency is less than Second Threshold, illustrates that the change of delivery temperature is not likely to be and is caused by coolant leakage
, now determine that the coolant in air-conditioner does not leaks, improve the accuracy of coolant leakage detection.
According to one embodiment of present invention, according to operating mode and the running status of described air-conditioner, determine
The step of the theoretical delivery temperature of described compressor, specifically includes: detection outdoor environment temperature, described
The temperature of the outdoor heat exchanger outlet of air-conditioner and the running frequency of described compressor；According to described room
The temperature of external environment temperature, described outdoor heat exchanger outlet and the running frequency of described compressor, meter
Calculate described theoretical delivery temperature.
In view of in the actual moving process of air-conditioner, the operating mode of air-conditioner (refers mainly to outdoor environment
Temperature) and running status (refer mainly to outdoor heat exchanger outlet temperature and compressor operation frequency
Rate) etc. factor all can affect the delivery temperature of compressor, so comprehensive outdoor environment temperature, outdoor are changed
The many factors such as the temperature of hot device outlet and the running frequency of compressor calculate the theoretical row of compressor
Temperature, it is ensured that the accuracy of result of calculation, thinks that the accuracy of coolant leakage testing result provides
Ensure.
According to one embodiment of present invention, according to the described theoretical delivery temperature of below equation calculating:
TP=a+b × Te+c×Th+d×Fi；
Wherein, TPFor described theoretical delivery temperature, TeFor described outdoor environment temperature, ThFor described
The temperature of outdoor heat exchanger outlet, FiFor the running frequency of described compressor, a, b, c, d are all normal
Number.
During calculating theoretical delivery temperature by above-mentioned formula, the T in formulae、Th、FiAll
Being numerical value, a, b, c, d can obtain according to the specific performance of air-conditioner and design requirement, specifically
Ground, according to function of many variables method of least square computational methods, takes in the air-conditioner running of certain model
Four different operating mode values, corresponding four different Te、Th、FiThe actual row detected with temperature sensor
Temperature value, thus calculate the occurrence of a, b, c and d.
According to one embodiment of present invention, also include: the coolant leakage in determining described air-conditioner
Time, carry out alarm by following arbitrary or various ways: voice mode, graphics context mode, luminescence
Mode；And/or send control instruction to designated equipment, carry out warning and carry controlling described designated equipment
Show.
During coolant leakage in determining air-conditioner, can point out to user in time, specifically, empty
Adjust device self by voice (as the speaker etc. by arranging on air-conditioner carries out voice message), figure
Literary composition (such as display graph text informations such as the display screens by arranging on air-conditioner), luminescence are (as by controlling
On air-conditioner arrange LED etc. carry out luminous prompting) etc. various ways point out to user,
Or also can directly to designated equipment (user use with air-conditioner to the mobile device being associated, can wear
Wear equipment etc.) send control instruction, carry out alarm controlling designated equipment so that once detect
To coolant leakage, no matter user can be known in time near air-conditioner or away from air-conditioner, in order to user
Use relevant emergency measure, reduce further infringement air-conditioner caused because of coolant leakage, its
In, carry out the mode of alarm and include but not limited to above-mentioned voice mode, graphics context mode, luminescence
Mode.
Fig. 2 shows the schematic block diagram of coolant leakage detection device according to an embodiment of the invention.
As in figure 2 it is shown, coolant leakage detects device 200 according to an embodiment of the invention, including:
Temperature detecting unit 202, first determine unit 204 and leak detection unit 206.
Wherein, temperature detecting unit 202, for detecting the real-time ventilation temperature of the compressor of air-conditioner
Degree；First determines unit 204, for the operating mode according to described air-conditioner and running status, determines institute
State the theoretical delivery temperature of compressor；Leak detection unit 206, for according to described real-time ventilation temperature
Degree and described theoretical delivery temperature, determine whether the coolant in described air-conditioner leaks.
The real time exhaust gas temperature of compressor can be by the temperature sensor being arranged on air-conditioner or its other party
Formula detects, and the theoretical delivery temperature of compressor can be according to the operating mode of air-conditioner (such as residing outdoor ring
Border temperature etc.) and running status (such as the running frequency etc. of compressor) determine, due in air-conditioner
Coolant once leak, the delivery temperature of compressor has a bigger fluctuation, namely compressor
Delivery temperature relative theory delivery temperature has relatively large deviation, can be according to the real-time ventilation temperature of compressor
Degree and the theoretical delivery temperature determined, determine whether the coolant in air-conditioner leaks so that air-conditioning in time
Device has possessed and has detected the function whether coolant leaks, the further merit to air-conditioner according to delivery temperature
Can carry out perfect, and be avoided as much as, because air-conditioner is caused damage by coolant leakage, improve sky
Adjust the self-protection ability of device, it also avoid the potential safety hazard brought to user because of coolant leakage simultaneously.
Coolant leakage detection device 200 according to the abovementioned embodiments of the present invention, it is also possible to have following
Technical characteristic:
According to one embodiment of present invention, described leak detection unit 206 includes: first judges list
Unit 2062, for judge difference between described real time exhaust gas temperature and described theoretical delivery temperature and
Whether the ratio of described theoretical delivery temperature is more than or equal to first threshold；Second determines unit
2064, for judging described real time exhaust gas temperature and described theory at described first judging unit 2062
Difference and the ratio of described theoretical delivery temperature between delivery temperature are more than or equal to described first threshold
Time, determine the coolant leakage in described air-conditioner；And judge at described first judging unit 2062
Difference between described real time exhaust gas temperature and described theoretical delivery temperature and described theoretical delivery temperature
When ratio is less than described first threshold, determine that the coolant in described air-conditioner does not leaks.
By judging difference between real time exhaust gas temperature and theoretical delivery temperature and theory delivery temperature
Whether more than or equal to first threshold, (such as 15%, first threshold can be carried out ratio according to the actual requirements
Adjust), if it is determined that the difference between real time exhaust gas temperature and theoretical delivery temperature and theoretical delivery temperature
Ratio more than or equal to first threshold, then explanation real time exhaust gas temperature relative theory delivery temperature deviation
It is bigger, it may be determined that now the coolant in air-conditioner leaks, if it is determined that real time exhaust gas temperature is with theoretical
The ratio of the difference between delivery temperature and theoretical delivery temperature less than first threshold, then illustrates row in real time
Temperature relative theory delivery temperature deviation is in the reasonable scope, it may be determined that the now coolant in air-conditioner
Leak.
According to one embodiment of present invention, also include: adjustment unit 208, for described first
Judging unit 2062 judge the difference between described real time exhaust gas temperature and described theoretical delivery temperature and
When the ratio of described theoretical delivery temperature is more than or equal to described first threshold, by the electricity of described air-conditioner
Sub-expansion valve increases to predetermined aperture；Record unit 210, for recording described compressor in institute respectively
State electric expansion valve and increase to the first running frequency before and after described predetermined aperture and the second running frequency；
Described leak detection unit 206 also includes: the second judging unit 2066, is used for judging described second
Whether difference between running frequency and described first running frequency and the ratio of described first running frequency
More than or equal to Second Threshold；Described second determine unit 2064 specifically for, sentence described second
Disconnected unit 2066 judges the difference between described second running frequency and described first running frequency and institute
When stating the ratio of the first running frequency more than or equal to described Second Threshold, determine in described air-conditioner
Coolant leakage.
In the actual moving process of air-conditioner, affect delivery temperature a lot of because have of compressor,
So at the difference judged between real time exhaust gas temperature and theoretical delivery temperature and the ratio of theoretical delivery temperature
Value is more than or equal to after first threshold, in addition it is also necessary to carry out detection further to improve coolant leakage detection
Accuracy, specifically, by by the electric expansion valve of air-conditioner, (this electric expansion valve is used for controlling
Cold medium flux in air-conditioner) increase to predetermined aperture, and difference recording compressed machine is at electric expansion valve
Increase to the first running frequency before and after predetermined aperture and the second running frequency, and judge the second operation
Difference and the ratio of the first running frequency between frequency and the first running frequency are more than or equal to the second threshold
Value (such as 15%, Second Threshold can be adjusted according to the actual requirements), just determine in air-conditioner is cold
Matchmaker leaks, if it is determined that the difference and first between the second running frequency and the first running frequency is run
The ratio of frequency is less than Second Threshold, illustrates that the change of delivery temperature is not likely to be and is caused by coolant leakage
, now determine that the coolant in air-conditioner does not leaks, improve the accuracy of coolant leakage detection.
According to one embodiment of present invention, described first determines that unit 204 is specifically for sensing chamber
External environment temperature, described air-conditioner outdoor heat exchanger outlet temperature and the operation of described compressor
Frequency；According to described outdoor environment temperature, the temperature of described outdoor heat exchanger outlet and described compression
The running frequency of machine, calculates described theoretical delivery temperature.
In view of in the actual moving process of air-conditioner, the operating mode of air-conditioner (refers mainly to outdoor environment
Temperature) and running status (refer mainly to outdoor heat exchanger outlet temperature and compressor operation frequency
Rate) etc. factor all can affect the delivery temperature of compressor, so comprehensive outdoor environment temperature, outdoor are changed
The many factors such as the temperature of hot device outlet and the running frequency of compressor calculate the theoretical row of compressor
Temperature, it is ensured that the accuracy of result of calculation, thinks that the accuracy of coolant leakage testing result provides
Ensure.
According to one embodiment of present invention, described first determine unit 204 specifically for, according to
The described theoretical delivery temperature of lower formula calculating:
TP=a+b × Te+c×Th+d×Fi；
Wherein, TPFor described theoretical delivery temperature, TeFor described outdoor environment temperature, ThFor described
The temperature of outdoor heat exchanger outlet, FiFor the running frequency of described compressor, a, b, c, d are all normal
Number.
During calculating theoretical delivery temperature by above-mentioned formula, the T in formulae、Th、FiAll
Being numerical value, a, b, c, d can obtain according to the specific performance of air-conditioner and design requirement, specifically
Ground, according to function of many variables method of least square computational methods, takes in the air-conditioner running of certain model
Four different operating mode values, corresponding four different Te、Th、FiThe actual row detected with temperature sensor
Temperature value, thus calculate the occurrence of a, b, c and d.
According to one embodiment of present invention, also include: Tip element 212, for determine described
During coolant leakage in air-conditioner, carry out alarm by following arbitrary or various ways: voice side
Formula, graphics context mode, illumination mode；And/or transmitting element 214, control for sending to designated equipment
Instruction, carries out alarm controlling described designated equipment.
During coolant leakage in determining air-conditioner, can point out to user in time, specifically, empty
Adjust device self by voice (as the speaker etc. by arranging on air-conditioner carries out voice message), figure
Literary composition (such as display graph text informations such as the display screens by arranging on air-conditioner), luminescence are (as by controlling
On air-conditioner arrange LED etc. carry out luminous prompting) etc. various ways point out to user,
Or also can directly to designated equipment (user use with air-conditioner to the mobile device being associated, can wear
Wear equipment etc.) send control instruction, carry out alarm controlling designated equipment so that once detect
To coolant leakage, no matter user can be known in time near air-conditioner or away from air-conditioner, in order to user
Use relevant emergency measure, reduce further infringement air-conditioner caused because of coolant leakage, its
In, carry out the mode of alarm and include but not limited to above-mentioned voice mode, graphics context mode, luminescence
Mode.
Fig. 3 shows the schematic block diagram of air-conditioner according to an embodiment of the invention.
As it is shown on figure 3, embodiment according to the third aspect of the invention we, it is also proposed that a kind of air-conditioner
300, including: coolant leakage detection device 200 as shown in Figure 2.
Below in conjunction with Fig. 4, technical scheme is described further.
As shown in Figure 4, coolant leakage detection method according to another embodiment of the invention, bag
Include:
Step 402, operating air conditioner.
Step 404, calculates the theoretical aerofluxus of compressor by the automatically controlled chip program arranged in air-conditioner
Temperature TP。
Step 406, calculates (T by automatically controlled chip programP1-TPWhether)/TP > M sets up, if
It is to perform step 408；Otherwise, execution step 404 is returned.Wherein, TP1(i.e. real-time ventilation temperature
Degree) it is the numerical value detected by the exhaust gas temperature sensor being arranged on air-conditioner, M (i.e. first
Threshold value) can value be 15%, certain M value can be adjusted according to the actual requirements, it addition, work as
(TP1-TPDuring)/TP=M, also perform step 408.
Step 408, increases the aperture of electric expansion valve, compressor fortune before and after chip memory adjusts simultaneously
Line frequency value P1 (the i.e. first running frequency) and P2 (the second running frequency).Wherein, electronics is swollen
Swollen valve is used for controlling cold medium flux in air-conditioner.
Step 410, chip program calculates whether (P2-P1)/P1 > N sets up, and if so, performs step
Rapid 412；Otherwise, execution step 408 is returned.Wherein, N (i.e. Second Threshold) can value be
15%, certain N value can be adjusted according to the actual requirements, it addition, as (P2-P1)/P1=N
Time, also perform step 412.
Step 412, sends, to user, the signal that cold-producing medium (i.e. coolant) is revealed.Specifically, air-conditioning
Device is self by voice (as the speaker etc. by arranging on air-conditioner carries out voice message), picture and text
(such as display graph text informations such as the display screens by arranging on air-conditioner), luminescence are (as by controlling sky
Adjust the LED etc. arranged on device to carry out luminous prompting) etc. various ways point out to user, or
Also can directly to designated equipment (user use with air-conditioner to the mobile device being associated, wearable
Equipment etc.) send control instruction, carry out alarm controlling designated equipment.
Above-mentioned detection process can be divided into two stages:
First detection-phase: presupposition theory delivery temperature T in chip programPValue calculates correlation
(TP=a+b × Te+c×Th+d×Fi), by detection outdoor environment temperature Te, outdoor heat exchanger
Temperature T of outlethRunning frequency F with compressoriCalculate delivery temperature TP, wherein, a,
B, c, d are all constants, and a, b, c, d can come according to the specific performance of air-conditioner and design requirement
Obtaining, specifically, according to function of many variables method of least square computational methods, the air-conditioner in certain model is transported
Four different operating mode values, corresponding four different T are taken during rowe、Th、FiDetect with temperature sensor
The actual exhaust air temperature value arrived, thus calculate the occurrence of a, b, c and d, such as certain model air-conditioning
A corresponding to device can value [10,20], b, c and d can values [0.6,1.5].Simultaneously by aerofluxus temperature
Degree sensor detects delivery temperature measured value TP1(i.e. real time exhaust gas temperature), chip program is fallen into a trap
Calculate (TP1-TP)/TP, and judge (TP1-TP)/TP> whether M set up, if set up, continue
Enter the second detection-phase.
Second detection-phase: electric expansion valve is increased to suitable aperture, simultaneously memory electronic in chip
Expansion valve adjust before and after running frequency value P1 of compressor and P2, program calculates (P2-P1)
The value of/P1, and judge whether (P2-P1)/P1 > N sets up.
If the judgement relation in two above stage is all set up, then send the signal of leakage of refrigerant to
Family, if only judging (TP1-TP)/TP> M sets up, and (P2-P1)/P1 ＜ N, it is determined that empty
The coolant in device is adjusted not leak.It is, of course, also possible to only judge (T in the first stageP1-TP)/TP>M
During establishment, determine that cold-producing medium (i.e. coolant) leaks, and send the signal of leakage of refrigerant to
User.
By above-described embodiment, the most perfect function of air-conditioner (such as multi-split air conditioner),
Improve the self-protection ability of multi-split air conditioner, reduce the air-conditioner caused due to leakage of refrigerant
Fault.
Technical scheme being described in detail above in association with accompanying drawing, the present invention proposes a kind of new
Coolant leakage detection scheme, it is possible to whether the coolant in detection air-conditioner leaks, and keeps away as much as possible
Exempt from potential safety hazard air-conditioner being caused damage because of coolant leakage and bringing to user.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for
For those skilled in the art, the present invention can have various modifications and variations.All essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included in the present invention
Protection domain within.
Claims (13)
1. a coolant leakage detection method, it is characterised in that including:
The real time exhaust gas temperature of the compressor of detection air-conditioner；
Operating mode according to described air-conditioner and running status, determine the theoretical aerofluxus temperature of described compressor
Degree；
According to described real time exhaust gas temperature and described theoretical delivery temperature, determine in described air-conditioner is cold
Whether matchmaker leaks.
Coolant leakage detection method the most according to claim 1, it is characterised in that according to institute
State real time exhaust gas temperature and described theoretical delivery temperature, determine whether the coolant in described air-conditioner leaks
Step, specifically include:
Judge the difference between described real time exhaust gas temperature and described theoretical delivery temperature and described theoretical row
Whether the ratio of temperature is more than or equal to first threshold；
In the difference judged between described real time exhaust gas temperature and described theoretical delivery temperature and described theory
When the ratio of delivery temperature is more than or equal to described first threshold, determine that the coolant in described air-conditioner is let out
Leakage；And
In the difference judged between described real time exhaust gas temperature and described theoretical delivery temperature and described theory
When the ratio of delivery temperature is less than described first threshold, determine that the coolant in described air-conditioner does not leaks.
Coolant leakage detection method the most according to claim 2, it is characterised in that judging
Difference between described real time exhaust gas temperature and described theoretical delivery temperature and described theoretical delivery temperature
After ratio is more than or equal to the step of described first threshold, and cold in determining described air-conditioner
Before the step of matchmaker's leakage, also include:
The electric expansion valve of described air-conditioner is increased to predetermined aperture；
Record described compressor before and after described electric expansion valve increases to described predetermined aperture respectively
One running frequency and the second running frequency；
Judge the difference between described second running frequency and described first running frequency and described first fortune
Whether the ratio of line frequency is more than or equal to Second Threshold；
In the difference and described first judged between described second running frequency and described first running frequency
When the ratio of running frequency is more than or equal to described Second Threshold, perform to determine in described air-conditioner is cold
The step of matchmaker's leakage.
Coolant leakage detection method the most according to claim 1, it is characterised in that according to institute
State operating mode and the running status of air-conditioner, determine the step of the theoretical delivery temperature of described compressor, tool
Body includes:
Detect the temperature of the outdoor heat exchanger outlet of outdoor environment temperature, described air-conditioner and described pressure
The running frequency of contracting machine；
According to described outdoor environment temperature, the temperature of described outdoor heat exchanger outlet and described compressor
Running frequency, calculate described theoretical delivery temperature.
Coolant leakage detection method the most according to claim 4, it is characterised in that according to
The described theoretical delivery temperature of lower formula calculating:
TP=a+b × Te+c×Th+d×Fi；
Wherein, TPFor described theoretical delivery temperature, TeFor described outdoor environment temperature, ThFor described
The temperature of outdoor heat exchanger outlet, FiFor the running frequency of described compressor, a, b, c, d are all normal
Number.
Coolant leakage detection method the most according to any one of claim 1 to 5, its feature
It is, also includes:
During coolant leakage in determining described air-conditioner, reported by following arbitrary or various ways
Alert prompting: voice mode, graphics context mode, illumination mode；And/or
Send control instruction to designated equipment, carry out alarm controlling described designated equipment.
7. a coolant leakage detection device, it is characterised in that including:
Temperature detecting unit, for detecting the real time exhaust gas temperature of the compressor of air-conditioner；
First determines unit, for the operating mode according to described air-conditioner and running status, determines described pressure
The theoretical delivery temperature of contracting machine；
Leak detection unit, is used for according to described real time exhaust gas temperature and described theoretical delivery temperature, really
Whether the coolant in fixed described air-conditioner leaks.
Coolant leakage the most according to claim 7 detection device, it is characterised in that described in let out
Leakage detector unit includes:
First judging unit, is used for judging between described real time exhaust gas temperature and described theoretical delivery temperature
Difference and the ratio of described theoretical delivery temperature whether more than or equal to first threshold；
Second determines unit, for judging described real time exhaust gas temperature and institute at described first judging unit
State the ratio of the difference between theoretical delivery temperature and described theoretical delivery temperature more than or equal to described the
During one threshold value, determine the coolant leakage in described air-conditioner, and judge at described first judging unit
Difference between described real time exhaust gas temperature and described theoretical delivery temperature and described theoretical delivery temperature
When ratio is less than described first threshold, determine that the coolant in described air-conditioner does not leaks.
Coolant leakage the most according to claim 8 detection device, it is characterised in that also wrap
Include:
Adjustment unit, for judging described real time exhaust gas temperature and described reason at described first judging unit
Difference and the ratio of described theoretical delivery temperature between opinion delivery temperature are more than or equal to described first threshold
During value, the electric expansion valve of described air-conditioner is increased to predetermined aperture；
Record unit, increases to described pre-for recording described compressor respectively at described electric expansion valve
Determine the first running frequency before and after aperture and the second running frequency；
Described leak detection unit also includes: the second judging unit, is used for judging that described second runs frequency
Difference between rate and described first running frequency and the ratio of described first running frequency whether more than or
Equal to Second Threshold；
Described second determine unit specifically for, described second judging unit judge described second run
Difference between frequency and described first running frequency and the ratio of described first running frequency more than or etc.
When described Second Threshold, determine the coolant leakage in described air-conditioner.
Coolant leakage the most according to claim 7 detection device, it is characterised in that described the
One determine unit specifically for:
Detect the temperature of the outdoor heat exchanger outlet of outdoor environment temperature, described air-conditioner and described pressure
The running frequency of contracting machine；
According to described outdoor environment temperature, the temperature of described outdoor heat exchanger outlet and described compressor
Running frequency, calculate described theoretical delivery temperature.
11. coolant leakage according to claim 10 detection devices, it is characterised in that described
First determine unit specifically for, calculate described theoretical delivery temperature according to below equation:
TP=a+b × Te+c×Th+d×Fi；
Wherein, TPFor described theoretical delivery temperature, TeFor described outdoor environment temperature, ThFor described
The temperature of outdoor heat exchanger outlet, FiFor the running frequency of described compressor, a, b, c, d are all normal
Number.
12. detect device according to the coolant leakage according to any one of claim 7 to 11, and it is special
Levy and be, also include:
Tip element, when coolant leakage in determining described air-conditioner, by following arbitrary or
Various ways carries out alarm: voice mode, graphics context mode, illumination mode；And/or
Transmitting element, for sending control instruction to designated equipment, is carried out controlling described designated equipment
Alarm.
13. 1 kinds of air-conditioners, it is characterised in that including:
Coolant leakage detection device as according to any one of claim 7 to 12.
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