CN105605739A - Air conditioning system and monitoring method and device of refrigerant leakage of air conditioning system - Google Patents
Air conditioning system and monitoring method and device of refrigerant leakage of air conditioning system Download PDFInfo
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- CN105605739A CN105605739A CN201610020852.6A CN201610020852A CN105605739A CN 105605739 A CN105605739 A CN 105605739A CN 201610020852 A CN201610020852 A CN 201610020852A CN 105605739 A CN105605739 A CN 105605739A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the field of air conditioners and particularly relates to an air conditioning system and a monitoring method and device of refrigerant leakage of the air conditioning system. In the operation process of the air conditioning system, real-time operation frequency Fr1 and real-time exhaust temperate Tp of a compressor are compared with a preset maximum frequency value Fr and a preset temperature protection threshold Tmax which correspond to real-time outdoor environment temperate, when Fr1 is smaller than Fr-N and Tp is larger than Tmax, it is judged that refrigerant may leak, whether refrigerant leakage of the air conditioning system happens or not can be monitored in advance in real time, and under the condition that it is judged that the refrigerant may leak, the refrigerant leakage detection confirmation step preferentially and automatically starts, so that little leakage of a small amount of refrigerant can be conveniently and effectively detected in time, and the adverse consequence that the effect of the air conditioning system becomes poor due to further leakage of the refrigerant, and accordingly user experience is affected is avoided.
Description
Technical field
The invention belongs to field of air conditioning, relate in particular to a kind of air-conditioning system and coolant leakage thereof monitoring method andDevice.
Background technology
For air conditioner user, encounter air conditioner refrigerating possibly when air-conditioning or heating effect is poor usingProblem, and cause the reason coolant leakage often of this problem. The inside and outside machine of general splitting air conditioner,All need to carry out scene and install and be connected in user family, the connector of inside and outside machine easily occurs unstable existingResemble, or in the long-term operation vibrations process of air-conditioner, the fragile position of other copper pipes all likely occurs coldThe situation that matchmaker is leaked. In air-conditioning system, the leakage of refrigerant can reduce compressor and suck coolant quantity, causes coldThe caloric value that matchmaker takes away compressor electric motor reduces, and causes compressor heat to discharge, exhaust outlet temperature rise,Compressor is caused damage.
Although present most air-conditioning system carries the too high defencive function of compressor exhaust temperature, open next timeMachine operation still there will be the phenomenon of excessive discharge temperature, and running causes the coolant leakage amount can be larger repeatedly, rightThe injury of air-conditioning is also just larger. Therefore, coolant leakage can cause air-conditioning ability decline, cooling or heating effect byGradual change is poor, even leaks when serious and can damage compressor, causes serious loss. And at present, coolant leakagePhenomenon is generally just can be found in the time that user feedback air-conditioning effect is very poor, and now the refrigerant of air-conditioning system is let outLeakage quantity is often more, and user's life has been caused to larger impact.
Summary of the invention
In view of this, object of the present invention is to provide the monitoring side of a kind of air-conditioning system and coolant leakage thereofWhether method and device, leak and carry out Real-Time Monitoring the refrigerant of air-conditioning system, solved existing air-conditioning system notCan find in time the technical problem of coolant leakage phenomenon.
First aspect, the monitoring method of air-conditioning system coolant leakage provided by the invention, comprising:
Detect the residing outdoor environment temperature Tw of outdoor unit of air-conditioning system;
Table look-up and obtain the maximum frequency values Fr of compressor default at this temperature;
Obtain real time execution frequency Fr1 and the real time exhaust gas temperature Tp of compressor;
By described real time execution frequency Fr1 and real time exhaust gas temperature Tp respectively with described maximum frequency values Fr andDefault temperature protection threshold value Tmax compares;
In the time of Fr1 < Fr-N and Tp > Tmax, judge that refrigerant may leak; Wherein N is what presetBe not less than 3 constant.
Second aspect, the monitoring device of air-conditioning system coolant leakage provided by the invention, comprising:
Outdoor temperature acquiring unit, for detection of the residing outdoor environment temperature Tw of outdoor unit of air-conditioning system;
Peak frequency acquiring unit, obtains the maximum frequency values of compressor default at this temperature for tabling look-upFr；
The first parameter acquiring unit, for obtaining real time execution frequency Fr1 and the real time exhaust gas temperature of compressorTp；
The first comparing unit, for by described real time execution frequency Fr1 and real time exhaust gas temperature Tp respectively withDescribed maximum frequency values Fr and default temperature protection threshold value Tmax compare;
Pre-judging unit, for when Fr1 < Fr-N and the Tp > Tmax, judges that refrigerant may leak;Wherein N is 3 the constant of being not less than of presetting.
The third aspect, the present invention also provides a kind of air-conditioning system. This air-conditioning system is built-in sky as aboveThe monitoring device of adjusting system coolant leakage.
According to the monitoring method of air-conditioning system provided by the invention and coolant leakage thereof and device, can be to air-conditioningWhether the refrigerant of system occurs to leak is carried out real-time monitoring in advance, is judging that the feelings of leaking may occur refrigerantUnder condition, both can process by alerting users, step is confirmed in the detection that also can automatically enter coolant leakage,To be just detected in the time that refrigerant has a small amount of leakage timely and effectively, avoid refrigerant further to leak and causeThe deleterious of air-conditioning system affects the adverse consequences generation that user experiences then.
Brief description of the drawings
Fig. 1 is the realization flow of the monitoring method of the air-conditioning system coolant leakage that provides of one embodiment of the inventionFigure;
Fig. 2 is the realization stream of the monitoring method of the air-conditioning system coolant leakage that provides of another embodiment of the present inventionCheng Tu;
Fig. 3 is the structured flowchart of the monitoring device of the air-conditioning system coolant leakage that provides of one embodiment of the invention;
Fig. 4 is the structural frames of the monitoring device of the air-conditioning system coolant leakage that provides of another embodiment of the present inventionFigure.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and realityExecute example, the present invention is further elaborated. Only should be appreciated that specific embodiment described hereinOnly, in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 is the realization flow of the monitoring method of the air-conditioning system coolant leakage that provides of one embodiment of the inventionFigure; For convenience of explanation, only show the part relevant to the present embodiment, as shown in the figure:
The monitoring method of the air-conditioning system coolant leakage that the present embodiment provides, comprises the following steps:
In step S10, detect the residing outdoor environment temperature Tw of outdoor unit of air-conditioning system;
In step S20, table look-up and obtain the maximum frequency values Fr of compressor default at this temperature;
In step S30, obtain real time execution frequency Fr1 and the real time exhaust gas temperature Tp of compressor;
In step S40, by described real time execution frequency Fr1 and real time exhaust gas temperature Tp respectively with describedMaximum frequency values Fr and default temperature protection threshold value Tmax compare;
In step S50, in the time of Fr1 < Fr-N and Tp > Tmax, judge that refrigerant may leak;Wherein N is 3 the constant of being not less than of presetting.
The monitoring method of the air-conditioning system coolant leakage providing according to the present embodiment, can realize air-conditioning systemRefrigerant whether occur to leak and carry out real-time monitoring in advance.
Particularly, in step S10-S20, first detect and obtain the residing outdoor environment of outdoor unit of air-conditioning systemTemperature T w, then obtain the maximum frequency values Fr of compressor default at this temperature by tabling look-up. Preferably,Can detect off-premises station by the temperature sensor or the environment temperature-sensitive bag that are arranged at outdoor unit of air-conditioning systemResiding current outdoor environment temperature Tw, after having obtained current outdoor environment temperature Tw, then passes throughTable look-up and find the maximum frequency values Fr of the compressor corresponding with this temperature value. Hence one can see that, this outdoor environmentThe one-to-one relationship of the maximum frequency values Fr of temperature T w and compressor just pre-sets before dispatching from the factory,As preferably, consider the feasibility that compressor frequency is adjusted, be generally an outdoor environment temperature value intervalThe maximum frequency values Fr of a corresponding compressor.
After having obtained the maximum frequency values Fr of outdoor environment temperature Tw and corresponding compressor, furtherObtain the real time execution frequency Fr1 of compressor and the real time exhaust gas temperature Tp of exhaust outlet of compressor; And this is realTime running frequency Fr1 and real time exhaust gas temperature Tp respectively with aforesaid maximum frequency values Fr and default temperatureProtection threshold value Tmax compares. There are more crucial data here: default temperature protectionThreshold value Tmax. Suck coolant quantity because coolant leakage will inevitably reduce compressor, cause refrigerant to take away compressionThe caloric value of dynamo-electric machine reduces, and exhaust outlet temperature just rises, and therefore, at real time exhaust gas temperature, Tp is higherTime, just should consider whether coolant leakage has occurred. As preferably, at real time exhaust gas temperatureAfter Tp has exceeded default temperature protection threshold value Tmax, further judge the real time execution frequency of compressorWhether Fr1 is also away from aforesaid maximum frequency values Fr, general, can be by a parameter N is setWeigh the gap between real time execution frequency Fr1 and maximum frequency values Fr, further, N is constant, andTaking N >=3 as good. In the time of Tp > Tmax and Fr1 < Fr-N, can tentatively judge that refrigerant may let outLeak. Till this step, the monitoring method of the air-conditioning system coolant leakage that the embodiment of the present invention provides, realizesTo refrigerant whether occur leak Real-Time Monitoring, and, be to establish according to user at the compressor of air-conditioning systemIn fixed target indoor temperature normal course of operation, carry out, inside and outside rotation speed of fan is also set by user oneself,Therefore can't normally use air-conditioning to have any impact to user. Once reach the anticipation bar of coolant leakagePart, just judges that refrigerant may leak, and further can whether refrigerant be leaked and be done further alerting usersConfirmation or automatically enter judgement the stage of recognition, to avoid other accidents.
On the other hand, in above-mentioned detection method, real time execution frequency Fr1 and real time exhaust gas temperature Tp are distinguishedAfter the step comparing with maximum frequency values Fr and default temperature protection threshold value Tmax, excellent as oneSelect that embodiment, can also comprise the following steps, even Fr1 >=Fr-N, reduces the operation of compressor frequentlyRate. That is to say, in the situation that real time execution frequency Fr1 and maximum frequency values Fr relatively approach, canTaking the mode that reduces compressor operating frequency to adjust the operation of air-conditioning system, to reduce erroneous judgementProbability, improves the degree of accuracy.
Monitoring method at the air-conditioning system coolant leakage providing according to above-described embodiment is carried out coolant leakageAfter anticipation, both can send alerting users and done the signal of further detection and confirmation, also can automatically enterEnter to judge in the step of confirming. The air-conditioning system refrigerant that Fig. 2 shows another embodiment of the present invention provides is let outThe realization flow figure of the monitoring method of leaking. Referring to Fig. 2: in the present embodiment shown in Fig. 2, except comprisingOutside the disclosed step S10-S50 of previous embodiment, also comprise following air-conditioning system automatically confirm judgement stepRapid:
In step S60, control air-conditioning system and move a preset time T according to the preset parameter of setting; InstituteState running frequency Fr2, the rotating speed Pn of indoor fan that preset parameter comprises compressor and the rotating speed of outdoor fanPw；
In step S70, obtain current value I 1 and the real time exhaust gas temperature Tp1 of compressor;
In step S80, by the current value I of described compressor 1 and real time exhaust gas temperature Tp1 respectively with skyMinimum current value I and maximum temperature values Tpm under adjusting system standard condition compare;
In step S90, if I1 < I and Tp1 > Tpm, the refrigerant of the definite air-conditioning system of judgement is let outLeak.
In the present embodiment, the monitoring method of air-conditioning system coolant leakage is judging that refrigerant may leak itAfter, automatically enter again and judge the stage of confirming. First, control air-conditioning system according to the preset parameter fortune of settingRow one preset time T, this preset parameter comprises the running frequency Fr2 of compressor, the rotating speed Pn of indoor fanRotating speed Pw with outdoor fan. After entering judgement the stage of recognition, by the compressor frequency of air-conditioning systemBe adjusted to default fixed value Fr2 (such as Fr2=50HZ), inside and outside rotation speed of fan and be also transferred to respectively default turningSpeed Pn and Pw, and according to this preset parameter continuous service one preset time T, after treating that operating mode is stable,Obtain compressor current value I 1, and again obtain the real time exhaust gas temperature Tp1 of compressor, by the two pointMinimum current value I and maximum temperature values Tpm not and under air-conditioning system standard condition compare. SpecificallyWhile realization, need to first table look-up and obtain the minimum current value of air-conditioning system under the standard condition of work at present patternI and maximum temperature values Tpm, and mode of operation has comprised refrigeration mode, heating mode and dehumidification mode, butBe not limited to again this three class. That is to say, obtaining current value I 1 and the real time exhaust gas temperature of compressorAfter Tp1, first table look-up and obtain the minimum electricity under standard condition according to the current mode of operation of air-conditioning systemFlow valuve I and maximum temperature values Tpm, generally before dispatching from the factory, repeatedly Validity Test is known, pre-stored in systemIn. Then, then by the current value I of compressor 1 and real time exhaust gas temperature Tp1 respectively with the working as of air-conditioning systemMinimum current value I and maximum temperature values Tpm under front mode of operation standard condition compare. If occurI1 < I and Tp1 > Tpm set up simultaneously, can determine that the refrigerant of air-conditioning system leaks.
As preferably, after judgement determines that the refrigerant of air-conditioning system leaks, air-conditioning provided by the inventionThe monitoring method of system coolant leakage can also comprise the following steps: generate coolant leakage alarm signal, and defeatedGo out this alarm signal. By this alarm signal, can active warning client take corresponding treatment measures.
The present invention also provides a kind of monitoring device of air-conditioning system coolant leakage. Fig. 3 and Fig. 4 illustrate respectivelyThe structured flowchart of monitoring device of the air-conditioning system coolant leakages that provide of two embodiment of the present invention. Equally, for convenience of explanation, all only show the part relevant to the present embodiment.
Referring to Fig. 3, the monitoring device of the air-conditioning system coolant leakage that the embodiment of the present invention provides, comprising:
Outdoor temperature acquiring unit 11, for detection of the residing outdoor environment temperature Tw of outdoor unit of air-conditioning system;
Peak frequency acquiring unit 12, obtains the peak frequency of compressor default at this temperature for tabling look-upValue Fr;
The first parameter acquiring unit 13, for obtaining real time execution frequency Fr1 and the real-time ventilation temperature of compressorDegree Tp;
The first comparing unit 14, for distinguishing described real time execution frequency Fr1 and real time exhaust gas temperature TpCompare with described maximum frequency values Fr and default temperature protection threshold value Tmax;
Pre-judging unit 15, for when Fr1 < Fr-N and the Tp > Tmax, judges that refrigerant may let outLeak; Wherein N is 3 the constant of being not less than of presetting.
Referring to Fig. 4, in the present embodiment shown in Fig. 4, except comprising the disclosed outdoor temp of previous embodimentDegree acquiring unit 11, peak frequency acquiring unit 12, the first parameter acquiring unit 13, the first comparing unit14 and pre-judging unit 15 outside, the monitoring device of this air-conditioning system coolant leakage also comprises:
The first regulation and control unit 16, when presetting according to the preset parameter operation one of setting for controlling air-conditioning systemBetween T; Described preset parameter comprises the running frequency Fr2 of compressor, rotating speed Pn and the outdoor wind of indoor fanThe rotating speed Pw of machine;
The second parameter acquiring unit 17, for obtaining current value I 1 and the real time exhaust gas temperature Tp1 of compressor;
The second comparing unit 18, for dividing the current value I of described compressor 1 and real time exhaust gas temperature Tp1Minimum current value I and maximum temperature values Tpm not and under air-conditioning system standard condition compare;
Judge confirmation unit 19, if for I1 < I and Tp1 > Tpm, the refrigerant of air-conditioning system is determined in judgementLeak.
As preferably, the monitoring device of this air-conditioning system coolant leakage can also comprise: alarm unit, forDetermine after the refrigerant of air-conditioning system occurs to leak and generate coolant leakage alarm signal in judgement, and export this reportAlert signal; Or, the second regulation and control unit, for when Fr1 >=Fr-N, the running frequency of reduction compressor.In order to briefly explain, just all not shown in accompanying drawing.
Finally, the embodiment of the present invention also provides a kind of air-conditioning system. This air-conditioning system is with regard to built-in as above each realityExecute the described coolant leakage monitoring device of example. Because other aspects to air-conditioning system there is no improvement, at this justRepeat no more.
In sum, according to the monitoring method of air-conditioning system provided by the invention and coolant leakage thereof and device,Can whether occur to leak to the refrigerant of air-conditioning system and carry out real-time monitoring in advance, judge that refrigerant may send outIn raw situation of leaking, both can process by alerting users, also can automatically enter the detection of coolant leakageConfirm step, to be just detected in the time that refrigerant has a small amount of leakage timely and effectively, avoided refrigerant to enter oneStep is leaked and is caused the deleterious of air-conditioning system then to affect the adverse consequences generation that user experiences.
It should be noted that in above-described embodiment, included unit just carries out according to function logicDivide, but be not limited to above-mentioned division, as long as can realize corresponding function; In addition, eachThe concrete title of functional unit also, just for the ease of mutual differentiation, is not limited to protection model of the present inventionEnclose.
In addition, those skilled in the art can be well understood to, for convenience of description and succinctly,Only be illustrated with the division of above-mentioned each functional unit, in practical application, can be as required and by upperState function distribution and completed by different functional units, be divided into different merits by the internal structure of described deviceEnergy unit or module, to complete all or part of function described above. Each functional unit in embodimentCan be integrated in a processing unit, can be also that the independent physics of unit exists, also can two orMore than two unit is integrated in a unit, and above-mentioned integrated unit both can adopt the form of hardware realExisting, also can adopt the form of SFU software functional unit to realize. In addition, the concrete title of each functional unit also onlyBe for the ease of mutual differentiation, be not limited to the application's protection domain. The tool of unit in said apparatusBody running process, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, although referencePrevious embodiment has been carried out more detailed explanation to the present invention, and for a person skilled in the art, it is complied withThe technical scheme that so can record aforementioned each embodiment is modified or to part technical characterictic whereinBe equal to replacement. All any amendments of doing within the spirit and principles in the present invention, be equal to replace and changeEnter etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a monitoring method for air-conditioning system coolant leakage, is characterized in that, described monitoring method comprises:
Detect the residing outdoor environment temperature Tw of outdoor unit of air-conditioning system;
Table look-up and obtain the maximum frequency values Fr of compressor default at this temperature;
Obtain real time execution frequency Fr1 and the real time exhaust gas temperature Tp of compressor;
By described real time execution frequency Fr1 and real time exhaust gas temperature Tp respectively with described maximum frequency values Fr andDefault temperature protection threshold value Tmax compares;
In the time of Fr1 < Fr-N and Tp > Tmax, judge that refrigerant may leak; Wherein N is what presetBe not less than 3 constant.
2. the monitoring method of air-conditioning system coolant leakage as claimed in claim 1, is characterized in that,After judging that refrigerant may leak, described monitoring method also comprises:
Control air-conditioning system and move a preset time T according to the preset parameter of setting; Described preset parameter comprisesThe rotating speed Pw of the running frequency Fr2 of compressor, the rotating speed Pn of indoor fan and outdoor fan;
Obtain current value I 1 and the real time exhaust gas temperature Tp1 of compressor;
By the current value I of described compressor 1 and real time exhaust gas temperature Tp1 respectively with air-conditioning system standard conditionUnder minimum current value I and maximum temperature values Tpm compare;
If I1 < I and Tp1 > Tpm, judgement determines that the refrigerant of air-conditioning system leaks.
3. the monitoring method of air-conditioning system coolant leakage as claimed in claim 2, is characterized in that,After judgement determines that the refrigerant of air-conditioning system leaks, described monitoring method also comprises:
Generate coolant leakage alarm signal, and export this alarm signal.
4. the monitoring method of air-conditioning system coolant leakage as claimed in claim 2, is characterized in that, instituteState by the current value I of described compressor 1 and real time exhaust gas temperature Tp1 respectively with air-conditioning system standard condition underMinimum current value I and the step that compares of maximum temperature values Tpm be specially;
Table look-up and obtain the minimum current value I of air-conditioning system under the standard condition of work at present pattern and maximum temperatureDegree value Tpm, described mode of operation comprises refrigeration mode, heating mode and dehumidification mode;
By the current value I of described compressor 1 and real time exhaust gas temperature Tp1 respectively with air-conditioning system standard conditionUnder minimum current value I and maximum temperature values Tpm compare.
5. the monitoring method of air-conditioning system coolant leakage as claimed in claim 1, is characterized in that,By described real time execution frequency Fr1 and real time exhaust gas temperature Tp respectively with described maximum frequency values Fr and defaultThe step that compares of temperature protection threshold value Tmax after, described monitoring method also comprises:
If Fr1 >=Fr-N, reduces the running frequency of compressor.
6. a monitoring device for air-conditioning system coolant leakage, is characterized in that, described monitoring device comprises:
Outdoor temperature acquiring unit, for detection of the residing outdoor environment temperature Tw of outdoor unit of air-conditioning system;
Peak frequency acquiring unit, obtains the maximum frequency values of compressor default at this temperature for tabling look-upFr；
The first parameter acquiring unit, for obtaining real time execution frequency Fr1 and the real time exhaust gas temperature of compressorTp；
The first comparing unit, for by described real time execution frequency Fr1 and real time exhaust gas temperature Tp respectively withDescribed maximum frequency values Fr and default temperature protection threshold value Tmax compare;
Pre-judging unit, for when Fr1 < Fr-N and the Tp > Tmax, judges that refrigerant may leak;Wherein N is 3 the constant of being not less than of presetting.
7. the monitoring device of air-conditioning system coolant leakage as claimed in claim 6, is characterized in that, instituteStating monitoring device also comprises:
The first regulation and control unit, moves a Preset Time for controlling air-conditioning system according to the preset parameter of settingT; Described preset parameter comprises the running frequency Fr2 of compressor, rotating speed Pn and the outdoor fan of indoor fanRotating speed Pw;
The second parameter acquiring unit, for obtaining current value I 1 and the real time exhaust gas temperature Tp1 of compressor;
The second comparing unit, for distinguishing the current value I of described compressor 1 and real time exhaust gas temperature Tp1Compare with minimum current value I and maximum temperature values Tpm under air-conditioning system standard condition;
Judge confirmation unit, if for I1 < I and Tp1 > Tpm, the refrigerant of the definite air-conditioning system of judgement is sent outRaw leakage.
8. the monitoring device of air-conditioning system coolant leakage as claimed in claim 7, is characterized in that, instituteStating monitoring device also comprises:
Alarm unit, for determining that in judgement the refrigerant of air-conditioning system generates coolant leakage report after occurring to leakAlert signal, and export this alarm signal.
9. the monitoring device of air-conditioning system coolant leakage as claimed in claim 5, is characterized in that, instituteStating monitoring device also comprises:
The second regulation and control unit, for when Fr1 >=Fr-N, the running frequency of reduction compressor.
10. an air-conditioning system, is characterized in that, described air-conditioning system has comprised appoints as claim 6-9The monitoring device of the air-conditioning system coolant leakage described in.
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