CN105890116B - The detection method and system of air conditioner coolant leakage - Google Patents
The detection method and system of air conditioner coolant leakage Download PDFInfo
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- CN105890116B CN105890116B CN201610268330.8A CN201610268330A CN105890116B CN 105890116 B CN105890116 B CN 105890116B CN 201610268330 A CN201610268330 A CN 201610268330A CN 105890116 B CN105890116 B CN 105890116B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
- 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
- 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
- F24F11/50—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
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- 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
Abstract
The present invention discloses the detection method and system of a kind of air conditioner coolant leakage.Detection method includes the following steps: S10: obtaining air-conditioning present mode of operation, current outdoor environment temperature, current indoor environment temperature；S20: normal refrigerant mass flow Q is searched；S30: current compressor suction temperature t is obtainedIt inhalesAnd pressure of inspiration(Pi) PIt inhales；S40: current compressor inspiratory volume V is searchedIt inhales；S50: current refrigerant mass flow Q is calculatedM；S60: determine current refrigerant mass flow QMWhether normal refrigerant mass flow Q is less than；S70: if QM< Q, according to formula η=(Q-QM)/Q% calculates refrigerant mass flow and declines percentage η；S80: it is compared with η with the size of preset percentage threshold X.The detection method of air conditioner coolant leakage of the invention advantageously reduces detecting step, reduces transmission data, thus be conducive to avoid the generation of detection failure, it is simple and reliable.
Description
Technical field
The present invention relates to secondary refrigerant leakage technical field, detection method more particularly, to a kind of leakage of air conditioner coolant and it is
System.
Background technique
For air conditioner during installation process and long-time service, pipeline may the poor, bending or long-term because of leakproofness
Corrosion etc. reasons and there is coolant leakage.From the point of view of fundamentally, the embodiment mode of coolant leakage is the reduction of cold medium flux.And it is cold
Matchmaker, which measures deficiency, so that air conditioning performance is declined, and run compressor under poor situation, even occur compressor damage when serious
Situation.
The relevant technologies disclose the detection method and system (publication No.: CN104296946A) of a kind of air conditioner coolant leakage,
Respectively increase a temperature sensing package on compressor air suction mouth, indoor heat exchanger and outdoor heat exchanger, temperature is detected simultaneously by temperature sensing package
According to various comparison steps to detect the refrigerant mass flow in air-conditioning system, although showing for secondary refrigerant leakage can be found in time
As, but detecting step is more, transmission data are more, is easy to appear detection failure.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention mentions
A kind of detection method of air conditioner coolant leakage out, it is simple and reliable.
The present invention also proposes a kind of detection system of air conditioner coolant leakage, for controlling the detection of above-mentioned air conditioner coolant leakage
Method.
The detection method of air conditioner coolant leakage according to an embodiment of the present invention, includes the following steps: S10: obtaining air-conditioning and works as
Preceding operational mode, current outdoor environment temperature, current indoor environment temperature；S20: it from pre-stored relational expression, finds and institute
State the corresponding normal refrigerant quality stream of present mode of operation, the current outdoor environment temperature, the current indoor environment temperature
Q is measured, the pre-stored relational expression includes that the corresponding of air conditioning operating mode, outdoor environment temperature and indoor environment temperature three is closed
System；S30: after first predetermined time of operation of air conditioner, by the temperature-detecting device that is located on the air intake duct of compressor and
Pressure-detecting device obtains current compressor suction temperature tIt inhalesAnd pressure of inspiration(Pi) PIt inhales；S40: from pre-stored compressor air suction temperature
In the corresponding relationship of degree, pressure of inspiration(Pi) and compressor air suction specific volume, find and current compressor suction temperature tIt inhalesAnd pressure of inspiration(Pi)
Power PIt inhalesCorresponding current compressor inspiratory volume VIt inhales；S50: according to current compressor inspiratory volume VIt inhalesBetween the performance of compressor
Relationship, calculate current refrigerant mass flow QM；S60: determine current refrigerant mass flow QMWhether normal refrigerant quality stream is less than
Measure Q；S70: if QM< Q, then according to formula η=(Q-QMRefrigerant mass flow decline percentage η is calculated in)/Q%；S80: it uses
The refrigerant mass flow decline percentage η is compared with the size of preset percentage threshold X, using comparison result as inspection
Survey the foundation of coolant leakage.
The detection method of air conditioner coolant leakage according to an embodiment of the present invention, by finding from pre-stored relational expression
Normal refrigerant mass flow corresponding with air-conditioning present mode of operation, current outdoor environment temperature, current indoor environment temperature, then
Using on the air intake duct for being located at compressor temperature-detecting device and pressure-detecting device directly acquire current compressor air suction
Temperature and pressure of inspiration(Pi), and find current compressor aspiration ratio corresponding with current compressor air suction temperature and pressure of inspiration(Pi)
Hold, obtain current refrigerant mass flow followed by the relationship between the inspiratory volume of current compressor and the performance of compressor,
Then judge whether current refrigerant mass flow is less than normal refrigerant mass flow, if current refrigerant mass flow is cold less than normal
Matchmaker's mass flow then continues according to formula η=(Q-QMRefrigerant mass flow decline percentage η is calculated in)/Q%, and with cold
Matchmaker's mass flow decline percentage η is compared with the size of preset percentage threshold X, and comparison result is cold as detecting
The foundation of matchmaker's leakage.Have in the entire detection process of air conditioner coolant leakage compared to detection method in the related technology as a result,
Conducive to reduction detecting step, transmission data are reduced, thus be conducive to avoid the generation of detection failure, it is simple and reliable.
According to some embodiments of the present invention, in step S60, if QM>=Q is then returned after the second predetermined time
Step S10.
According to some embodiments of the present invention, in step s 50, according to formula QM=QV/VIt inhalesObtain current refrigerant quality stream
Measure QM, wherein QVFor the volume flow of compressor.
According to some embodiments of the present invention, the step S10 includes following sub-step: S1: obtaining current indoor environment
Temperature and air-conditioning set temperature；S2: determine whether the difference of current indoor environment temperature and air-conditioning set temperature has met setting
Comfort condition；S3: if the difference meets setting comfort condition, air-conditioning present mode of operation and current outdoor environment are obtained
Temperature；If the difference does not meet setting comfort condition, step S1 is returned to.
Specifically, step S20 further includes following steps: S4: from the pre-stored relational expression, searching the current operation mould
Formula, the current outdoor environment temperature, the corresponding compressor frequency of the current indoor environment temperature, and current compressor is transported
Line frequency is set as the compressor frequency searched；S5: the pre-stored relational expression further includes air conditioning operating mode, outdoor environment temperature
The corresponding relationship of degree, indoor environment temperature and compressor frequency is searched and described current from the pre-stored relational expression
Operational mode, the current outdoor environment temperature, the current indoor environment temperature, the current compressor running frequency are corresponding
Normal refrigerant mass flow Q.
Specifically, in step s 50, according to formula QM=f × D/VIt inhalesObtain current refrigerant mass flow QM, wherein f is to work as
Preceding compressor operating frequency, D are the cylinder volume of compressor.
According to some embodiments of the present invention, include using comparison result as the foundation of detection secondary refrigerant leakage in step S80
Following steps: determine whether the refrigerant mass flow decline percentage η is greater than the preset percentage threshold X；When described
When refrigerant mass flow declines percentage η greater than the preset percentage threshold X, it is determined that secondary refrigerant leakage；When the refrigerant
Mass flow declines percentage η and is not more than the preset percentage threshold X, then returns to step S10.
Further, secondary refrigerant leakage fault code is shown after determining secondary refrigerant leakage and protects shutdown.
The detection system of air conditioner coolant according to an embodiment of the present invention leakage is set on the air intake duct of the compressor of the air-conditioning
There are temperature-detecting device and pressure-detecting device, the detection system includes: first acquisition unit, is currently transported for obtaining air-conditioning
Row mode, current outdoor environment temperature, current indoor environment temperature；First searching unit is used for the root from pre-stored relational expression
It is found according to the present mode of operation, the current outdoor environment temperature, the current indoor environment temperature corresponding normal
Refrigerant mass flow Q；Second acquisition unit, for obtaining the temperature-detecting device and the pressure-detecting device detects
Current compressor suction temperature tIt inhalesAnd pressure of inspiration(Pi) PIt inhales；Second searching unit, for from pre-stored compressor air suction temperature, inhale
In the corresponding relationship of atmospheric pressure and compressor air suction specific volume, find and current compressor suction temperature tIt inhalesWith pressure of inspiration(Pi) PIt inhalesIt is right
The current compressor inspiratory volume V answeredIt inhales；First computing unit, for calculating current refrigerant mass flow QM；First determines list
Member, for determining current refrigerant mass flow QMWhether normal refrigerant mass flow Q is less than；Second computing unit, for working as QM<
According to formula η=(Q-Q when QMRefrigerant mass flow decline percentage η is calculated in)/Q%；Leak detection unit is used for institute
It states refrigerant mass flow decline percentage η to be compared with the size of preset percentage threshold X, using comparison result as detection
The foundation of coolant leakage.
The detection system of air conditioner coolant leakage according to an embodiment of the present invention, not only structure is simple, and advantageously reduces
Detecting step when secondary refrigerant leakage is detected, transmission data are reduced, to be conducive to avoid the generation of detection failure, improves detection
Reliability.
Specifically, the leak detection unit includes: the first judgement subelement, for determining under the refrigerant mass flow
Whether drop percentage η is greater than the preset percentage threshold X；First determines subelement, for working as the refrigerant mass flow
When declining percentage η greater than the preset percentage threshold X, secondary refrigerant leakage is determined；First returns to subelement, for when described
Refrigerant mass flow declines percentage η and is not more than the preset percentage threshold X, then returns and re-execute first acquisition
Unit.
Further, the detection system of air conditioner coolant leakage further includes protection subelement, for determining son described first
After unit determines secondary refrigerant leakage, shows secondary refrigerant leakage fault code and protect shutdown.
Specifically, first computing unit is according to formula QM=QV/VIt inhalesObtain current refrigerant mass flow QM, wherein QV
For the volume flow of compressor.
Specifically, the first acquisition unit further include: first obtains subelement, for obtaining current indoor environment temperature
And air-conditioning set temperature；Subelement is determined, for whether to judge the difference of current indoor environment temperature and air-conditioning set temperature
Meet setting comfort condition；Second obtains subelement, if the difference meets setting comfort condition, works as obtaining air-conditioning
Preceding operational mode and current outdoor environment temperature；If the difference does not meet setting comfort condition, return re-executes institute
State the first acquisition subelement.
Further, the detection system of air conditioner coolant leakage further includes first control unit, and the first control unit is used
In from the pre-stored relational expression, the present mode of operation, the current outdoor environment temperature, the current indoor ring are searched
The corresponding compressor frequency of border temperature, and by current compressor running frequency be set as search compressor frequency；Described first
Searching unit is also used to search from pre-stored relational expression and the present mode of operation, the current outdoor environment temperature, described
The corresponding normal refrigerant mass flow Q of current indoor environment temperature, the current compressor running frequency.
Further, first computing unit is according to formula QM=f × D/VIt inhalesObtain current refrigerant mass flow QM,
Middle f is current compressor running frequency, and D is the cylinder volume of compressor.
Detailed description of the invention
Fig. 1 is the flow chart of the detection method of air conditioner coolant leakage according to some embodiments of the invention；
Fig. 2 is the schematic diagram of the detection system of air conditioner coolant leakage according to some embodiments of the invention；
Fig. 3 is the flow chart of the detection method of the air conditioner coolant leakage of other embodiments according to the present invention；
Fig. 4 is the schematic diagram of the detection system of the air conditioner coolant leakage of other embodiments according to the present invention；
Fig. 5 is the schematic diagram of air-conditioning according to an embodiment of the present invention.
Appended drawing reference:
Air-conditioning 100；
Compressor 101；Pressure-detecting device 102；Temperature-detecting device 103；
First acquisition unit 1；First obtains subelement 11；Determine subelement 12；Second obtains subelement 13；
First control unit 2；First searching unit 3；Second acquisition unit 4；Second searching unit 5；First computing unit
6；First judging unit 7；Second computing unit 8；Leak detection unit 9；First determines subelement 91；First returns to subelement
92；First determines subelement 93；Protect subelement 10.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings.Below with reference to
The embodiment of attached drawing description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the detection system for describing 100 secondary refrigerant leakage of air-conditioning according to an embodiment of the present invention, can be used for holding
The detection method of 100 secondary refrigerant leakage of row air-conditioning.Wherein, air-conditioning 100 can be convertible frequency air-conditioner or fixed frequency air conditioner.
As shown in Figure 2 and Figure 4, the detection system of 100 secondary refrigerant leakage of air-conditioning according to an embodiment of the present invention may include
One acquiring unit 1, the first searching unit 3, second acquisition unit 4, the second searching unit 5, the first computing unit 6, first determine
Unit 7, the second computing unit 8 and leak detection unit 9.
Specifically, first acquisition unit 1 can be used for obtaining 100 present mode of operation of air-conditioning, current outdoor environment temperature
Degree and current indoor environment temperature.For example, first acquisition unit 1 starts to obtain after air-conditioning 100 is switched on the first preset time of operation
Take 100 present mode of operation of air-conditioning, current outdoor environment temperature and current indoor environment temperature.Wherein it is possible to understand, the
One preset time can be adjusted according to different 100 types of air-conditioning, for example, the first preset time can be 30min.
It is understood that present mode of operation may include refrigeration mode and heating mode.
First searching unit 3 can be used for from pre-stored relational expression, according to present mode of operation, current outdoor environment temperature
Corresponding normal refrigerant mass flow Q is found with current indoor environment temperature.
For example, the operational mode of air-conditioning 100 includes refrigeration mode and heating mode.In cooling mode, by outdoor environment
Temperature is divided into multiple outer temperature refrigerated areas, and indoor environment temperature is divided into multiple interior temperature refrigerated areas, each outer warm refrigerated area
The all corresponding normal refrigerant mass flow value Q of corresponding interior temperature refrigerated area11、Q12……Q1N……QN1、QN2……
QNM.In a heating mode, outdoor environment temperature is divided into multiple outer temperature heating zones, indoor environment temperature is divided into multiple interior temperature
Heating zone, the corresponding normal refrigerant mass flow value in interior temperature heating zone corresponding to each outer warm heating zone
QHeat 11、QHeat 12……QHot 1N……QHot N1、QHot N2……QHot NM.It can currently be transported convenient for the first searching unit 3 according to air-conditioning 100 as a result,
Row mode, current outdoor environment temperature and current indoor environment temperature determine the value of current normal refrigerant mass flow Q.
Second acquisition unit 4 can be used for obtaining the current pressure that temperature-detecting device 103 and pressure-detecting device 102 detect
101 suction temperature t of contracting machineIt inhalesAnd pressure of inspiration(Pi) PIt inhales.For example, as shown in figure 5, being respectively equipped with pressure on the air intake duct of compressor 101
Force checking device 102 and temperature-detecting device 103, after air-conditioning 100 ran for the first predetermined time, second acquisition unit 4 can be obtained
The pressure of inspiration(Pi) P for the current compressor 101 that pressure force checking device 102 and temperature-detecting device 103 detect respectivelyIt inhalesWith it is current
The suction temperature t of compressor 101It inhales.Optionally, pressure-detecting device 102 can be pressure sensor, temperature-detecting device 103
It can be temperature sensor.
Second searching unit 5 can be used for inhaling from pre-stored 101 suction temperature of compressor, pressure of inspiration(Pi) and compressor 101
In the corresponding relationship of gas specific volume, find and 101 suction temperature t of current compressorIt inhalesWith pressure of inspiration(Pi) PIt inhalesCorresponding current compression
101 inspiratory volume V of machineIt inhales.Wherein it should be noted that 101 inspiratory volume V of compressorIt inhalesIt is therefore utilized for refrigerant physical parameter
101 suction temperature t of current compressorIt inhalesWith pressure of inspiration(Pi) PIt inhalesIt can inquire to obtain the suction of current compressor 101 in conjunction with refrigerant physical property table
Gas specific volume VIt inhales。
First computing unit 6 can be used for calculating current refrigerant mass flow QM, that is, the first computing unit 6 can be according to current
101 inspiratory volume V of compressorIt inhalesRelationship between the performance of compressor 101 calculates current refrigerant mass flow QM, simply may be used
It leans on.
First judging unit 7 can be used for determining current refrigerant mass flow QMWhether normal refrigerant mass flow Q is less than.?
That is the first judging unit 7 can be used for determining the calculated current refrigerant mass flow Q of the first computing unit 6MIt is whether small
It is determined in the first searching unit 3 according to 100 present mode of operation of air-conditioning, current outdoor environment temperature and current indoor environment temperature
Current normal refrigerant mass flow Q.Specifically, when the first judging unit 7 determines current refrigerant mass flow QM>=normal
When refrigerant mass flow Q, it can illustrate that air-conditioning 100 without secondary refrigerant leakage, and after air-conditioning 100 ran for the second predetermined time, returns to weight
It is new to execute first acquisition unit 1.
Second computing unit 8 can be used for working as QMAccording to formula η=(Q-Q when < QMRefrigerant mass flow is calculated in)/Q%
Decline percentage η, that is to say, that when the first judging unit 7 determines QMWhen < Q, the second computing unit 8 can calculate single according to first
6 calculated current refrigerant mass flow Q of memberMWith the first searching unit 3 according to 100 present mode of operation of air-conditioning, current outdoor
The current normal refrigerant mass flow Q that environment temperature and current indoor environment temperature determine, and according to formula η=(Q-QM)/Q%
Refrigerant mass flow decline percentage η is calculated.
Leak detection unit 9 can be used for declining refrigerant mass flow the size of percentage η and preset percentage threshold X
It is compared, and using comparison result as the foundation of detection coolant leakage.Wherein, preset percentage threshold X is that air-conditioning 100 is cold
Matchmaker leaks to refrigerant mass flow decline ratio when influencing 100 performance of air-conditioning.Optionally, preset percentage threshold X is desirable
For 20%-30%.
Specifically, when leak detection unit 9 determines that refrigerant mass flow decline percentage η is greater than preset percentage threshold
When X, it is determined that secondary refrigerant leakage, when leak detection unit 9 determines that refrigerant mass flow decline percentage η is not more than preset percentage
When than threshold X, then illustrate that air-conditioning 100 does not influence the performance of air conditioner without secondary refrigerant leakage or amount of leakage.
The detection system of 100 secondary refrigerant leakage of air-conditioning according to an embodiment of the present invention, not only structure is simple, and is conducive to subtract
Detecting step when secondary refrigerant leakage is detected less, reduces data transmission, to be conducive to avoid the generation of detection failure, improves detection
Reliability when secondary refrigerant leakage.
In some embodiments of the invention, leak detection unit 9 includes that the first judgement subelement 91, first determines that son is single
Member 93 and first returns to subelement 92.Wherein, the first judgement subelement 91 can be used for determining that refrigerant mass flow declines percentage
Whether it is greater than preset percentage threshold X than η；First determines that subelement 93 can be used for declining percentage η when refrigerant mass flow
When greater than preset percentage threshold X, secondary refrigerant leakage is determined；First return subelement 92 can be used for declining when refrigerant mass flow
Percentage η is not more than preset percentage threshold X, then returns and re-execute first acquisition unit 1, simple and reliable as a result,.
Specifically, when the first judgement subelement 91 determines that refrigerant mass flow decline percentage η is greater than preset percentage
When than threshold X, first determines that subelement 93 can determine secondary refrigerant leakage；When the first judgement subelement 91 determines under refrigerant mass flow
When dropping percentage η no more than preset percentage threshold X, it can illustrate that air-conditioning 100 does not influence sky without secondary refrigerant leakage or amount of leakage
Adjust device performance, first return subelement 92 issue return signal to first acquisition unit 1 at, and the third predetermined time for example
After a week, first acquisition unit 1 is re-executed.
Specifically, the detection system of 100 secondary refrigerant leakage of air-conditioning further includes protection subelement 10, and protection subelement 10 can be used for
After first determines that subelement 93 determines secondary refrigerant leakage, shows secondary refrigerant leakage fault code and protect shutdown, in order to remind
100 failure of user's air-conditioning, and air-conditioning 100 is repaired in time convenient for user, he to improves the safety of air-conditioning 100 and make
Reliability.
In some embodiments of the invention, the first computing unit 6 is according to formula QM=QV/VIt inhalesObtain current refrigerant quality
Flow QM, wherein QVFor the volume flow of compressor 101.For example, when air-conditioning 100 is fixed frequency air conditioner, QVFor invariable frequency compressor
101 volume flow, the first computing unit 6 found according to the second searching unit 5 with 101 suction temperature t of current compressorIt inhales
With pressure of inspiration(Pi) PIt inhalesCorresponding 101 inspiratory volume V of current compressorIt inhales, and according to formula QM=QV/VIt inhalesCurrent refrigerant is calculated
Mass flow QM.It will be appreciated by persons skilled in the art that in invariable frequency compressor 101, the volume flow Q of compressor 101V
For definite value, unit m3/s。
In other embodiments of the invention, first acquisition unit 1 further includes the first acquisition subelement 11, determines that son is single
Member 12 and second obtains subelement 13.Wherein, the first acquisition subelement 11 can be used for obtaining current indoor environment temperature and air-conditioning
100 set temperatures；Determine subelement 12 can be used for judging current indoor environment temperature and 100 set temperature of air-conditioning difference whether
Setting comfort condition is met；If it is determined that subelement 12 determines the difference of current indoor environment temperature and 100 set temperature of air-conditioning
Value meets setting comfort condition, and the second acquisition subelement 13 can be used for obtaining 100 present mode of operation of air-conditioning and current outdoor
Environment temperature；If it is determined that subelement 12 determines that the difference of current indoor environment temperature and 100 set temperature of air-conditioning does not meet setting
Comfort condition then returns and re-executes the first acquisition subelement 11.
For example, air-conditioning 100 is convertible frequency air-conditioner, after air-conditioning 100 is switched on the second preset time of operation, first obtains subelement
11 can be used for obtaining 100 set temperature of current indoor environment temperature and air-conditioning, determine that subelement 12 can be used for judging current indoor
Whether the difference of environment temperature and 100 set temperature of air-conditioning has met setting comfort condition；If current indoor environment temperature with
The difference of 100 set temperature of air-conditioning meets setting comfort condition, and it is current that the second acquisition subelement 13 can be used for obtaining air-conditioning 100
Operational mode and current outdoor environment temperature；If the difference of current indoor environment temperature and 100 set temperature of air-conditioning does not meet and sets
Determine comfort condition, after 100 continuous service third preset time of air-conditioning, then returns and re-execute the first acquisition subelement 11.Its
In, it is to be understood that the second preset time and third preset time can be adjusted according to different 100 types of air-conditioning.
For example, the second preset time is 25min, third preset time is 10min.
Further, the detection system of 100 secondary refrigerant leakage of air-conditioning further includes first control unit 2, and first control unit 2 is used
In from pre-stored relational expression, present mode of operation, current outdoor environment temperature, the corresponding compression of current indoor environment temperature are searched
101 frequency of machine, and by 101 running frequency of current compressor be set as search 101 frequency of compressor, the compression searched as a result,
101 frequency of machine is that can maintain 101 frequency of compressor of current comfort condition.
For example, being divided into high-temperature refrigeration to outdoor environment temperature situation when the operational mode of air-conditioning 100 is refrigeration mode
(for example, 35 DEG C or more), medium temperature refrigeration (for example, 28 DEG C -35 DEG C) and cryogenic refrigeration (28 DEG C or less), to indoor environment temperature feelings
Condition is divided into high frequency mode (20 DEG C or less), intermediate frequency mode (20 DEG C -26 DEG C) and low frequency mode (26 DEG C or more), each outdoor environment
Temperature conditions respectively respectively corresponds 3 kinds of indoor environment temperature situations, and the frequency of compressor 101 is 9 kinds of parameters herein.Consequently facilitating the
One control unit 2 searches present mode of operation, current outdoor environment temperature, current indoor environment temperature from pre-stored relational expression
Corresponding 101 frequency of compressor.
In addition, the first searching unit 3 is also used to search and present mode of operation, current outdoor environment from pre-stored relational expression
Temperature, current indoor environment temperature and the corresponding normal refrigerant mass flow Q of 101 running frequency of current compressor.
For example, the operational mode of air-conditioning 100 includes refrigeration mode and heating mode.In cooling mode, to different pressures
Outdoor environment temperature is divided into multiple outer temperature refrigerated areas, indoor environment temperature is divided into multiple interior temperature by 101 running frequency of contracting machine
Refrigerated area, the corresponding refrigerant mass flow value Q of interior temperature refrigerated area corresponding to each outer warm refrigerated area11、
Q12……Q1N……QN1、QN2……QNM.In a heating mode, to 101 running frequency of different compressors, by outdoor environment temperature
It is divided into multiple outer temperature heating zones, indoor environment temperature is divided into multiple interior temperature heating zones, each outer warm heating zone institute is right
The interior temperature heating zone answered all corresponding refrigerant mass flow value QHeat 11、QHeat 12……QHot 1N……QHot N1、QHot N2……QHot NM。
Therefore, according to 100 present mode of operation of air-conditioning, current outdoor environment temperature, current indoor environment temperature, current compressor 101
Running frequency can determine the value of current normal refrigerant mass flow Q.
Specifically, the first computing unit 6 is according to formula QM=f × D/VIt inhalesObtain current refrigerant mass flow QM, wherein f be
101 running frequency of current compressor, D are the cylinder volume of compressor 101.Consequently facilitating the first judging unit 7 determine it is current cold
Matchmaker's mass flow QMWith the relationship between normal refrigerant mass flow Q.
The detection method of air conditioner coolant leakage according to an embodiment of the present invention is described below with reference to Fig. 1 and Fig. 3.
As shown in figures 1 and 3, the detection method of air conditioner coolant leakage according to an embodiment of the present invention, includes the following steps:
S10: air-conditioning present mode of operation, current outdoor environment temperature, current indoor environment temperature are obtained.For example, in sky
After tuning to open machine the first preset time of operation, passes through first acquisition unit and obtain air-conditioning present mode of operation, current outdoor environment temperature
Degree and current indoor environment temperature.
S20: it from pre-stored relational expression, finds and present mode of operation, current outdoor environment temperature, current indoor ring
The corresponding normal refrigerant mass flow Q of border temperature, pre-stored relational expression includes air conditioning operating mode, outdoor environment temperature and interior
The corresponding relationship of environment temperature three.For example, can by the first searching unit, from pre-stored relational expression, find with currently
The corresponding normal refrigerant mass flow Q of operational mode, current outdoor environment temperature, current indoor environment temperature.
S30: after the first predetermined time of operation of air conditioner, by the temperature-detecting device that is located on the air intake duct of compressor and
Pressure-detecting device obtains current compressor suction temperature tIt inhalesAnd pressure of inspiration(Pi) PIt inhales.For example, in the first predetermined time of operation of air conditioner
Afterwards, the suction for the current compressor that pressure-detecting device and temperature-detecting device detect respectively can be obtained by second acquisition unit
Atmospheric pressure PIt inhalesWith current compressor suction temperature tIt inhales。
S40: it from the corresponding relationship of pre-stored compressor air suction temperature, pressure of inspiration(Pi) and compressor air suction specific volume, looks into
It finds and current compressor suction temperature tIt inhalesWith pressure of inspiration(Pi) PIt inhalesCorresponding current compressor inspiratory volume VIt inhales.For example, can pass through
Second searching unit is looked into from the corresponding relationship of pre-stored compressor air suction temperature, pressure of inspiration(Pi) and compressor air suction specific volume
It finds and current compressor suction temperature tIt inhalesWith pressure of inspiration(Pi) PIt inhalesCorresponding current compressor inspiratory volume VIt inhales。
S50: according to current compressor inspiratory volume VIt inhalesRelationship between the performance of compressor calculates current refrigerant quality
Flow QM.For example, according to current compressor inspiratory volume VIt inhalesRelationship between the performance of compressor can calculate single by first
Member calculates current refrigerant mass flow QM。
S60: determine current refrigerant mass flow QMWhether normal refrigerant mass flow Q is less than.For example, can sentence by first
Order member determines current refrigerant mass flow QMWhether normal refrigerant mass flow Q is less than, when the first judging unit determines currently
Refrigerant mass flow QMWhen >=normal refrigerant mass flow Q, it can illustrate air-conditioning without secondary refrigerant leakage, when the judgement of the first judging unit is worked as
Preceding refrigerant mass flow QMWhen less than normal refrigerant mass flow Q, then next step S70 is continued to execute.
S70: if QM< Q, then according to formula η=(Q-QMRefrigerant mass flow decline percentage η is calculated in)/Q%.Example
Such as, work as QMWhen < Q, the second computing unit can be according to formula η=(Q-QMRefrigerant mass flow decline percentage is calculated in)/Q%
η。
S80: it is compared, will compare with refrigerant mass flow decline percentage η with the size of preset percentage threshold X
As a result the foundation as detection coolant leakage.For example, can by leak detection unit by refrigerant mass flow decline percentage η with
The size of preset percentage threshold X is compared, and using comparison result as the foundation of detection coolant leakage.
The detection method of air conditioner coolant leakage according to an embodiment of the present invention, by finding from pre-stored relational expression
Normal refrigerant mass flow corresponding with air-conditioning present mode of operation, current outdoor environment temperature, current indoor environment temperature, then
Using on the air intake duct for being located at compressor temperature-detecting device and pressure-detecting device directly acquire current compressor air suction
Temperature and pressure of inspiration(Pi), and find current compressor aspiration ratio corresponding with current compressor air suction temperature and pressure of inspiration(Pi)
Hold, obtain current refrigerant mass flow followed by the relationship between the inspiratory volume of current compressor and the performance of compressor,
Then judge whether current refrigerant mass flow is less than normal refrigerant mass flow, if current refrigerant mass flow is cold less than normal
Matchmaker's mass flow then continues according to formula η=(Q-QMRefrigerant mass flow decline percentage η is calculated in)/Q%, and with cold
Matchmaker's mass flow decline percentage η is compared with the size of preset percentage threshold X, and comparison result is cold as detecting
The foundation of matchmaker's leakage.Have in the entire detection process of air conditioner coolant leakage compared to detection method in the related technology as a result,
Conducive to reduction detecting step, transmission data are reduced, thus be conducive to avoid the generation of detection failure, it is simple and reliable.
According to some embodiments of the present invention, in step S60, if QM>=Q is then returned after the second predetermined time
Step S10.That is, when the detection method of air conditioner coolant leakage goes to step S60, if the judgement of the first judging unit is worked as
Preceding refrigerant mass flow QMWhen >=normal refrigerant mass flow Q, can illustrate air-conditioning without secondary refrigerant leakage, then it is pre- in operation of air conditioner second
After fixing time, return re-execute the steps S10.
In some embodiments of the invention, in step s 50, according to formula QM=QV/VIt inhalesObtain current refrigerant quality stream
Measure QM, wherein QVFor the volume flow of compressor.For example, when air-conditioning is fixed frequency air conditioner, it can be by the first computing unit according to public affairs
Formula QM=QV/VIt inhalesCurrent refrigerant mass flow Q is calculatedM.It is understood that in invariable frequency compressor, the volume of compressor
Flow QVFor definite value, unit m3/s。
According to some embodiments of the present invention, step S10 includes following sub-step:
S1: current indoor environment temperature and air-conditioning set temperature are obtained；
S2: determine whether the difference of current indoor environment temperature and air-conditioning set temperature has met setting comfort condition；
S3: if the difference of current indoor environment temperature and air-conditioning set temperature meets setting comfort condition, air-conditioning is obtained
Present mode of operation and current outdoor environment temperature；If difference does not meet setting comfort condition, step S1 is returned to.
For example, air-conditioning can be convertible frequency air-conditioner, after air-conditioning is switched on the second preset time of operation, son can be obtained by first
Unit obtains current indoor environment temperature and air-conditioning set temperature, by determining that subelement determines current indoor environment temperature and sky
Adjust whether the difference of set temperature has met setting comfort condition.When judgement subelement determines current indoor environment temperature and sky
When the difference of set temperature being adjusted to meet setting comfort condition, the second acquisition subelement can obtain air-conditioning present mode of operation and work as
Preceding outdoor environment temperature；When the difference for determining subelement judgement current indoor environment temperature and air-conditioning set temperature does not meet setting
When comfort condition, after air-conditioner continuous runs third preset time, then return step S1.
In some further embodiments of the invention, step S20 further includes following steps:
S4: from pre-stored relational expression, present mode of operation, current outdoor environment temperature, current indoor environment temperature are searched
Corresponding compressor frequency, and by current compressor running frequency be set as search compressor frequency；
S5: pre-stored relational expression further includes air conditioning operating mode, outdoor environment temperature, indoor environment temperature and compressor frequency
The corresponding relationship of rate is searched and present mode of operation, current outdoor environment temperature, current indoor from pre-stored relational expression
The corresponding normal refrigerant mass flow Q of environment temperature, current compressor running frequency.
For example, present mode of operation, current outdoor environment temperature can be searched by first control unit from pre-stored relational expression
It spends, the corresponding compressor frequency of current indoor environment temperature, and current compressor running frequency is set as to the compressor of lookup
Frequency, then by the first searching unit is searched from pre-stored relational expression and present mode of operation, current outdoor environment temperature,
The corresponding normal refrigerant mass flow Q of current indoor environment temperature, current compressor running frequency.
Specifically, in step s 50, according to formula QM=f × D/VIt inhalesObtain current refrigerant mass flow QM, wherein f is to work as
Preceding compressor operating frequency, D are the cylinder volume of compressor.
In some embodiments of the invention, include using comparison result as the foundation of detection secondary refrigerant leakage in step S80
Following steps:
Determine whether refrigerant mass flow decline percentage η is greater than preset percentage threshold X；
When refrigerant mass flow decline percentage η is greater than preset percentage threshold X, it is determined that secondary refrigerant leakage；
It is not more than preset percentage threshold X when refrigerant mass flow declines percentage η, then returns to step S10.
Specifically, it is default to determine whether refrigerant mass flow decline percentage η is greater than by the first judgement subelement
Percentage threshold X.When the first judgement subelement determines that refrigerant mass flow decline percentage η is greater than preset percentage threshold
When X, it can determine that subelement determines secondary refrigerant leakage by first；When the first judgement subelement determines that refrigerant mass flow declines percentage
When being not more than preset percentage threshold X than η, it can illustrate that air-conditioning does not influence the property of air conditioner without secondary refrigerant leakage or amount of leakage
Can, subelement return step S10 is returned by first.
Further, secondary refrigerant leakage fault code is shown after determining secondary refrigerant leakage and protects shutdown.Specifically,
After first determines that subelement determines secondary refrigerant leakage, secondary refrigerant leakage fault code can be shown by protection subelement and is protected and is stopped
Machine in order to remind user's air-conditioning failure, and in time repairs air-conditioning convenient for user, thus improve air-conditioning safety and
The reliability used.
Below with reference to the accompanying drawings the detection method of the air conditioner coolant leakage of the multiple specific embodiments of the present invention is retouched in detail
It states.
Embodiment 1
As shown in figure 5, the air-conditioning in the embodiment of the present invention is fixed frequency air conditioner, it is equipped on the air intake duct of the compressor of air-conditioning
Temperature-detecting device and pressure-detecting device.
As shown in Figure 1, the detection method that the air conditioner coolant of the embodiment of the present invention is revealed, includes the following steps:
S10: air-conditioning present mode of operation, current outdoor environment temperature, current indoor environment temperature are obtained.
S20: it from pre-stored relational expression, finds and present mode of operation, current outdoor environment temperature, current indoor ring
The corresponding normal refrigerant mass flow Q of border temperature, pre-stored relational expression includes air conditioning operating mode, outdoor environment temperature and interior
The corresponding relationship of environment temperature three.
S30: after the first predetermined time of operation of air conditioner, by the temperature-detecting device that is located on the air intake duct of compressor and
Pressure-detecting device obtains current compressor suction temperature tIt inhalesAnd pressure of inspiration(Pi) PIt inhales。
S40: it from the corresponding relationship of pre-stored compressor air suction temperature, pressure of inspiration(Pi) and compressor air suction specific volume, looks into
It finds and current compressor suction temperature tIt inhalesWith pressure of inspiration(Pi) PIt inhalesCorresponding current compressor inspiratory volume VIt inhales。
S50: according to current compressor inspiratory volume VIt inhalesRelationship between the performance of compressor, i.e. formula QM=QV/VIt inhales,
Calculate current refrigerant mass flow QM.It is understood that in invariable frequency compressor, the volume flow Q of compressorVIt is single for definite value
Position is m3/s。
S60: determine current refrigerant mass flow QMWhether normal refrigerant mass flow Q is less than.When the first judging unit is sentenced
Settled preceding refrigerant mass flow QMWhen >=normal refrigerant mass flow Q, it can illustrate air-conditioning without secondary refrigerant leakage, and in the second pre- timing
Between after, return re-execute the steps S10；When the first judging unit determines current refrigerant mass flow QMLess than normal refrigerant quality
When flow Q, then next step S70 is continued to execute.
S70: if QM< Q, then according to formula η=(Q-QMRefrigerant mass flow decline percentage η is calculated in)/Q%.
S80: it is compared, will compare with refrigerant mass flow decline percentage η with the size of preset percentage threshold X
As a result the foundation as detection coolant leakage.
Specifically, include the following steps: in step S80 using comparison result as the foundation of detection secondary refrigerant leakage
Determine whether refrigerant mass flow decline percentage η is greater than preset percentage threshold X；
When refrigerant mass flow decline percentage η is greater than preset percentage threshold X, it is determined that secondary refrigerant leakage；
When refrigerant mass flow decline percentage η is not more than preset percentage threshold X, then step S10 is returned to.
S90: secondary refrigerant leakage fault code is shown after determining secondary refrigerant leakage and protects shutdown.Specifically, first
After determining that subelement determines secondary refrigerant leakage, secondary refrigerant leakage fault code can be shown by protection subelement and protects shutdown, with
Convenient for reminding user's air-conditioning failure, and air-conditioning is repaired in time convenient for user, to improve air-conditioning safety and use
Reliability.
Embodiment 2
As shown in figure 5, the air-conditioning in the embodiment of the present invention is convertible frequency air-conditioner, it is equipped on the air intake duct of the compressor of air-conditioning
Temperature-detecting device and pressure-detecting device.
As shown in figure 3, the detection method that the air conditioner coolant of the embodiment of the present invention is revealed, includes the following steps:
S10: air-conditioning present mode of operation, current outdoor environment temperature, current indoor environment temperature are obtained.
Specifically, step S10 includes following sub-step:
S1: current indoor environment temperature and air-conditioning set temperature are obtained；
S2: determine whether the difference of current indoor environment temperature and air-conditioning set temperature has met setting comfort condition；
S3: if the difference of current indoor environment temperature and air-conditioning set temperature meets setting comfort condition, air-conditioning is obtained
Present mode of operation and current outdoor environment temperature；If difference does not meet setting comfort condition, step S1 is returned to；
S20: it from pre-stored relational expression, finds and present mode of operation, current outdoor environment temperature, current indoor ring
The corresponding normal refrigerant mass flow Q of border temperature, pre-stored relational expression includes air conditioning operating mode, outdoor environment temperature and interior
The corresponding relationship of environment temperature three.Step S20 specifically comprises the following steps:
S4: from pre-stored relational expression, present mode of operation, current outdoor environment temperature, current indoor environment temperature are searched
Corresponding compressor frequency, and by current compressor running frequency be set as search compressor frequency；
S5: pre-stored relational expression further includes air conditioning operating mode, outdoor environment temperature, indoor environment temperature and compressor frequency
The corresponding relationship of rate is searched and present mode of operation, current outdoor environment temperature, current indoor from pre-stored relational expression
The corresponding normal refrigerant mass flow Q of environment temperature, current compressor running frequency.
S30: after the first predetermined time of operation of air conditioner, by the temperature-detecting device that is located on the air intake duct of compressor and
Pressure-detecting device obtains current compressor suction temperature tIt inhalesAnd pressure of inspiration(Pi) PIt inhales。
S40: it from the corresponding relationship of pre-stored compressor air suction temperature, pressure of inspiration(Pi) and compressor air suction specific volume, looks into
It finds and current compressor suction temperature tIt inhalesWith pressure of inspiration(Pi) PIt inhalesCorresponding current compressor inspiratory volume VIt inhales。
S50: according to current compressor inspiratory volume VIt inhalesRelationship between the performance of compressor, i.e., according to formula QM=f
×D/VIt inhalesObtain current refrigerant mass flow QM, wherein f is current compressor running frequency, and D is the cylinder volume of compressor.
S60: determine current refrigerant mass flow QMWhether normal refrigerant mass flow Q is less than.When the first judging unit is sentenced
Settled preceding refrigerant mass flow QMWhen >=normal refrigerant mass flow Q, it can illustrate air-conditioning without secondary refrigerant leakage, and in the second pre- timing
Between after, return re-execute the steps S10；When the first judging unit determines current refrigerant mass flow QMLess than normal refrigerant quality
When flow Q, then next step S70 is continued to execute.
S70: if QM< Q, then according to formula η=(Q-QMRefrigerant mass flow decline percentage η is calculated in)/Q%.
S80: it is compared, will compare with refrigerant mass flow decline percentage η with the size of preset percentage threshold X
As a result the foundation as detection coolant leakage.
Specifically, include the following steps: in step S80 using comparison result as the foundation of detection secondary refrigerant leakage
Determine whether refrigerant mass flow decline percentage η is greater than preset percentage threshold X；
When refrigerant mass flow decline percentage η is greater than preset percentage threshold X, it is determined that secondary refrigerant leakage；
It is not more than preset percentage threshold X when refrigerant mass flow declines percentage η, then returns to step S10.
S90: secondary refrigerant leakage fault code is shown after determining secondary refrigerant leakage and protects shutdown.Specifically, first
After determining that subelement determines secondary refrigerant leakage, secondary refrigerant leakage fault code can be shown by protection subelement and protects shutdown, with
Convenient for reminding user's air-conditioning failure, and air-conditioning is repaired in time convenient for user, to improve air-conditioning safety and use
Reliability.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (13)
1. a kind of detection method of air conditioner coolant leakage, which comprises the steps of:
S10: air-conditioning present mode of operation, current outdoor environment temperature, current indoor environment temperature are obtained；
S20: from pre-stored relational expression, find with the present mode of operation, the current outdoor environment temperature, described work as
The corresponding normal refrigerant mass flow Q of preceding indoor environment temperature, the pre-stored relational expression include air conditioning operating mode, outdoor ring
The corresponding relationship of border temperature and indoor environment temperature three；
S30: after first predetermined time of operation of air conditioner, by the temperature-detecting device that is located on the air intake duct of compressor and
Pressure-detecting device obtains current compressor suction temperature tIt inhalesAnd pressure of inspiration(Pi) PIt inhales；
S40: it from the corresponding relationship of pre-stored compressor air suction temperature, pressure of inspiration(Pi) and compressor air suction specific volume, finds
With current compressor suction temperature tIt inhalesWith pressure of inspiration(Pi) PIt inhalesCorresponding current compressor inspiratory volume VIt inhales；
S50: according to current compressor inspiratory volume VIt inhalesRelationship between the performance of compressor calculates current refrigerant mass flow
QM；
S60: determine current refrigerant mass flow QMWhether normal refrigerant mass flow Q is less than；
S70: if QM< Q, then according to formula η=(Q-QMRefrigerant mass flow decline percentage η is calculated in)/Q%；
S80: it is compared, will compare with refrigerant mass flow decline percentage η with the size of preset percentage threshold X
As a result the foundation as detection coolant leakage,
Wherein the step S10 includes following sub-step:
S1: current indoor environment temperature and air-conditioning set temperature are obtained；
S2: determine whether the difference of current indoor environment temperature and air-conditioning set temperature has met setting comfort condition；
S3: if the difference meets setting comfort condition, air-conditioning present mode of operation and current outdoor environment temperature are obtained；If
The difference does not meet setting comfort condition, then returns to step S1.
2. the detection method of air conditioner coolant leakage according to claim 1, which is characterized in that in step S60, if QM
>=Q then returns step S10 after the second predetermined time.
3. the detection method of air conditioner coolant leakage according to claim 1, which is characterized in that in step s 50, according to public affairs
Formula QM=QV/VIt inhalesObtain current refrigerant mass flow QM, wherein QVFor the volume flow of compressor.
4. the detection method of air conditioner coolant leakage according to claim 1, which is characterized in that step S20 further includes as follows
Step:
S4: from the pre-stored relational expression, the present mode of operation, the current outdoor environment temperature, described current is searched
The corresponding compressor frequency of indoor environment temperature, and by current compressor running frequency be set as search compressor frequency；
S5: the pre-stored relational expression further includes air conditioning operating mode, outdoor environment temperature, indoor environment temperature and compressor frequency
The corresponding relationship of rate is searched and the present mode of operation, the current outdoor environment from the pre-stored relational expression
The corresponding normal refrigerant mass flow Q of temperature, the current indoor environment temperature, the current compressor running frequency.
5. the detection method of air conditioner coolant leakage according to claim 4, which is characterized in that in step s 50, according to public affairs
Formula QM=f × D/VIt inhalesObtain current refrigerant mass flow QM, wherein f is current compressor running frequency, and D is the cylinder of compressor
Volume.
6. the detection method of air conditioner coolant leakage according to any one of claims 1-5, which is characterized in that step S80
It is middle to include the following steps: comparison result as the foundation of detection secondary refrigerant leakage
Determine whether the refrigerant mass flow decline percentage η is greater than the preset percentage threshold X；
When refrigerant mass flow decline percentage η is greater than the preset percentage threshold X, it is determined that secondary refrigerant leakage；
It is not more than the preset percentage threshold X when the refrigerant mass flow declines percentage η, then returns to step S10.
7. the detection method of air conditioner coolant leakage according to claim 6, which is characterized in that after determining secondary refrigerant leakage
Display secondary refrigerant leakage fault code simultaneously protects shutdown.
8. a kind of detection system of air conditioner coolant leakage, which is characterized in that the air intake duct of the compressor of the air-conditioning is equipped with temperature
Degree detection device and pressure-detecting device, the detection system include:
First acquisition unit, for obtaining air-conditioning present mode of operation, current outdoor environment temperature, current indoor environment temperature；
First searching unit is used for from pre-stored relational expression, according to the present mode of operation, the current outdoor environment temperature
Degree, the current indoor environment temperature find corresponding normal refrigerant mass flow Q；
Second acquisition unit, the current compressor detected for obtaining the temperature-detecting device and the pressure-detecting device
Suction temperature tIt inhalesAnd pressure of inspiration(Pi) PIt inhales；
Second searching unit, for the correspondence from pre-stored compressor air suction temperature, pressure of inspiration(Pi) and compressor air suction specific volume
In relationship, find and current compressor suction temperature tIt inhalesWith pressure of inspiration(Pi) PIt inhalesCorresponding current compressor inspiratory volume VIt inhales；
First computing unit, for calculating current refrigerant mass flow QM；
First judging unit, for determining current refrigerant mass flow QMWhether normal refrigerant mass flow Q is less than；
Second computing unit, for working as QMAccording to formula η=(Q-Q when < QMRefrigerant mass flow decline hundred is calculated in)/Q%
Divide and compares η；
Leak detection unit, for by the refrigerant mass flow decline percentage η and preset percentage threshold X size into
Row compare, using comparison result as detect coolant leakage foundation,
The wherein first acquisition unit further include:
First obtains subelement, for obtaining current indoor environment temperature and air-conditioning set temperature；
Subelement is determined, for judging it is comfortable whether the difference of current indoor environment temperature and air-conditioning set temperature has met setting
Property condition；
Second obtains subelement, if the difference meets setting comfort condition, for obtaining air-conditioning present mode of operation and working as
Preceding outdoor environment temperature；If the difference does not meet setting comfort condition, return re-executes described first and obtains son list
Member.
9. the detection system of air conditioner coolant leakage according to claim 8, which is characterized in that the leak detection unit packet
It includes:
First determines subelement, for determining whether the refrigerant mass flow decline percentage η is greater than the preset percentage
Compare threshold X；
First determines subelement, for being greater than the preset percentage threshold X as refrigerant mass flow decline percentage η
When, determine secondary refrigerant leakage；
First returns to subelement, for being not more than the preset percentage threshold as refrigerant mass flow decline percentage η
Value X is then returned and is re-executed the first acquisition unit.
10. the detection system of air conditioner coolant leakage according to claim 9, which is characterized in that it further include protection subelement,
For showing secondary refrigerant leakage fault code and protecting shutdown after described first determines that subelement determines secondary refrigerant leakage.
11. the detection system of air conditioner coolant leakage according to claim 8, which is characterized in that first computing unit
According to formula QM=QV/VIt inhalesObtain current refrigerant mass flow QM, wherein QVFor the volume flow of compressor.
12. the detection system of air conditioner coolant leakage according to claim 8, which is characterized in that further include the first control list
Member, the first control unit are used to search the present mode of operation, the current outdoor ring from the pre-stored relational expression
Border temperature, the corresponding compressor frequency of the current indoor environment temperature, and current compressor running frequency is set as searching
Compressor frequency；
First searching unit is also used to search and the present mode of operation, the current outdoor ring from pre-stored relational expression
The corresponding normal refrigerant mass flow Q of border temperature, the current indoor environment temperature, the current compressor running frequency.
13. the detection system of air conditioner coolant leakage according to claim 12, which is characterized in that first computing unit
According to formula QM=f × D/VIt inhalesObtain current refrigerant mass flow QM, wherein f is current compressor running frequency, and D is compressor
Cylinder volume.
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