CN106594966A - Method for detecting refrigerant leakage of air conditioning system and air conditioning system - Google Patents
Method for detecting refrigerant leakage of air conditioning system and air conditioning system Download PDFInfo
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- CN106594966A CN106594966A CN201610984007.0A CN201610984007A CN106594966A CN 106594966 A CN106594966 A CN 106594966A CN 201610984007 A CN201610984007 A CN 201610984007A CN 106594966 A CN106594966 A CN 106594966A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000003507 refrigerant Substances 0.000 title abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000002826 coolant Substances 0.000 claims description 63
- 238000013480 data collection Methods 0.000 claims description 22
- 230000007423 decrease Effects 0.000 claims description 14
- 230000008034 disappearance Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 5
- 238000013500 data storage Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012217 deletion Methods 0.000 description 2
- 230000037430 deletion Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 241000937378 Everettia interior Species 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method for detecting refrigerant leakage of an air conditioning system, which comprises the following steps: s10, in the running process of the air conditioning system, when the external environment temperature is T, acquiring the state parameters of the air conditioning system, and storing the data acquired for the first time at the temperature as reference data; s20, in the running process of the air conditioning system, when the external environment temperature reaches T again, acquiring the state parameters of the air conditioning system again; s30, comparing the data collected again with the reference data, and calculating the deviation between the data and the reference data; and S40, judging that the refrigerant leaks when the deviation exceeds a preset value. When the method is adopted to detect the refrigerant leakage, the detection result is not influenced by the actual installation condition, and the influence of the environmental temperature can be eliminated, so that the degree of refrigerant loss in the air conditioning system can be accurately judged, and the detection result is more reliable. The invention also discloses an air conditioning system.
Description
Technical field
The present invention relates to air-conditioning technical field, and in particular to a kind of method of detection air conditioning system coolant leakage.The present invention
Further relate to a kind of air conditioning system.
Background technology
For air conditioning system, the amount of coolant should keep sufficient, if coolant is lacked, then can cause air-conditioning system
The ability (freeze or heat) of system declines, and affects the experience of user.It is in prior art, existing various for detecting coolant
The method of leakage.For example, there is the current coolant mass flow of acquisition, and according to current coolant mass flow and standard coolant quality stream
The comparative result of amount judges what whether coolant leaked；There is a current refrigerant pressure value of detection, and with preset pressure value judging coolant
Whether leak；Also the actual motion power having under detection air conditioning system current operating conditions, obtains the air-conditioner described
Theoretical operating rate under current operating conditions, and whether revealed based on data judging.
However, above-mentioned prior art is all that certain value of current actual measurement is compared with preset value, and preset value is general
Matching before dispatching from the factory confirms.In these detection methods, actual installation situation and ambient temperature are not accounted for
Situation.Such as, actual connection length of tube used when installing may vary, and connect that length of tube is different to affect unit
Parameter, so above-mentioned preset value has deviation with practical situation, causes testing result inaccurate.Equally, if actually detected
When it cannot be guaranteed that ambient temperature residing for air-conditioning is consistent with corresponding ambient temperature when determining the preset value, can also affect inspection
Survey the accuracy of result.
The content of the invention
Based on above-mentioned present situation, present invention is primarily targeted at provide it is a kind of detection air conditioning system coolant leakage method and
Air conditioning system, can detect the deletion condition of air conditioning system coolant exactly using the method, and testing result actually will not be filled
The impact of machine situation and ambient temperature.
For achieving the above object, the technical solution used in the present invention is as follows：
A kind of method of detection air conditioning system coolant leakage, which includes step：
S10, in air conditioning system running, ambient temperature be T when, gather air conditioning system state parameter,
And by data on the basis of the data storage for collecting first at this temperature；
S20, in air conditioning system running, when ambient temperature reaches T again, gather air conditioning system again
State parameter；
S30, the data for collecting again are contrasted with the benchmark data, calculated deviation therebetween；
S40, when the deviation exceed preset value when, be judged as coolant leakage.
Preferably, the state parameter of the air conditioning system includes compressor frequency, pressure at expulsion, pressure of inspiration(Pi), aerofluxuss temperature
Degree, electronic expansion valve opening, indoor heat exchanger enter the pipe degree of superheat, the indoor heat exchanger outlet pipe degree of superheat, and/or air conditioning capacity rate.
Preferably, preset value, drop of suction pressure are decrease beyond when compressor frequency decrease beyond preset value, pressure at expulsion
More than preset value, delivery temperature be increased beyond preset value, electronic expansion valve opening be increased beyond preset value, indoor heat exchanger enter pipe
The degree of superheat decrease beyond preset value, the indoor heat exchanger outlet pipe degree of superheat be increased beyond preset value, and/or air conditioning capacity rate decline it is super
When crossing preset value, it is judged as coolant leakage.
Preferably, before step S10, also including step：
S00, selected ambient temperature T, and the moment that ambient temperature is T is set to into data collection point.
Preferably, in step S00, multiple different data collection points is set, different ambient temperatures T are corresponded respectively toi。
Preferably, in step S00, the on-site ambient temperature range of air conditioning system is collected first, in the ambient temperature
In the range of every k DEG C specify a data collection point, k is predetermined temperature interval.
Preferably, in step S00, collection air conditioning system in the Internet is accessed by the communication module of air conditioning system on-site
Ambient temperature range, or, the on-site ambient temperature range of air conditioning system is collected by way of being manually entered, or, it is empty
Adjusting system prestores one or more regional ambient temperature ranges before dispatching from the factory.
Preferably, in step S10, the rate of load condensate of air conditioning system when record gathers the state parameter of air conditioning system first；Step
It is in rapid S20, when ambient temperature reaches T again, only identical with the rate of load condensate in step S10 in the rate of load condensate of air conditioning system
When, the state parameter of air conditioning system is gathered again.
Preferably, in step S40, the correspondence when preset value reaches 30%-35% for coolant disappearance amount in air conditioning system
State parameter and benchmark data between deviation.
A kind of air conditioning system, which adopts whether foregoing method detection coolant leaks.
The method of the detection air conditioning system coolant leakage that the present invention is provided, by will current actual measurement state parameter and before this
The benchmark data under equal conditions surveyed after start operation compares, and judges whether to send out by the variable quantity of the data surveyed
Raw coolant leakage, testing result are not affected by actual installation condition, and can eliminate the impact of ambient temperature, it is thus possible to accurate
Really judge the degree of coolant disappearance in air conditioning system, testing result is more reliable.
Description of the drawings
Hereinafter with reference to accompanying drawing to the excellent of the method and air conditioning system for detecting air conditioning system coolant leakage of the invention
Embodiment is selected to be described.In figure：
Fig. 1 is a kind of flow chart of the method for the detection air conditioning system coolant leakage of the preferred implementation according to the present invention；
Fig. 2 is the flow chart of the method for the detection air conditioning system coolant leakage of another kind of preferred implementation according to the present invention.
Specific embodiment
In order to detect whether air conditioning system occurs coolant leakage in use exactly, the invention provides one
The method for planting detection air conditioning system coolant leakage, as shown in figure 1, which includes step：
S10, in air conditioning system running, ambient temperature be T when, gather air conditioning system state parameter,
And by data on the basis of the data storage for collecting first at this temperature；
S20, in air conditioning system running, when ambient temperature reaches T again, gather air conditioning system again
State parameter；
S30, the data for collecting again are contrasted with the benchmark data, calculated deviation therebetween；
S40, when the deviation exceed preset value when, be judged as coolant leakage.
That is, in the method for the present invention, the Main Basiss of judgement are not that current certain value surveyed is true compared to before dispatching from the factory
Fixed preset value there occurs great change, but survey by the value of current actual measurement and after under equal conditions start runs before this
Benchmark data compare, and by survey value variable quantity judge whether occur coolant leakage.
For example, after installation is completed, or because safeguard or the reason such as telephone-moving and after coolant adding, can be in subsequent head
The secondary operation started shooting and step S10 is carried out after stable, and obtain benchmark data.Therefore, in the method for the present invention, Mei Yitai
The benchmark data for judging whether leakage coolant of air conditioning system is all each independent acquisition, will not receive what is adopted when installing
The impact of the factors such as connection length of tube.
During subsequent acquisition data, also it is easy to ensure every time the environment bar residing for air conditioning system during gathered data
Part is consistent with environmental condition when obtaining benchmark data, if ambient temperature T when recording gathered data first, and really
It is at temperature T to protect follow-up execution step S20 every time.
Therefore, after the completion of the method for the present invention can be installed exactly, air conditioning system is during long-term use
The situation of change of state parameter, and then the deletion condition of coolant can be judged by the situation of change of corresponding state parameter,
So as to when the degree of disappearance reaches degree (such as the significantly affecting the ability of air conditioning system) that must be supplemented with coolant, you can refer to
Show system cold medium shortage, for example, report coolant miss fault etc..
Preferably, the state parameter of the air conditioning system includes compressor frequency, pressure at expulsion, pressure of inspiration(Pi), aerofluxuss temperature
Degree, electronic expansion valve opening, indoor heat exchanger enter the pipe degree of superheat, the indoor heat exchanger outlet pipe degree of superheat, and/or air conditioning capacity rate.
It is demonstrated experimentally that these state parameters are all closely related with the amount of coolant, therefore, by detecting under same ambient temperature conditions these
The change procedure of at least one of state parameter, you can judge whether the amount of coolant occurs disappearance, and the degree of disappearance.It is aobvious
So, detect that state parameter is more, testing result is more objective.
Preferably, preset value, drop of suction pressure are decrease beyond when compressor frequency decrease beyond preset value, pressure at expulsion
More than preset value, delivery temperature be increased beyond preset value, electronic expansion valve opening be increased beyond preset value, indoor heat exchanger enter pipe
The degree of superheat decrease beyond preset value, the indoor heat exchanger outlet pipe degree of superheat be increased beyond preset value, and/or air conditioning capacity rate decline it is super
When crossing preset value, it is judged as coolant leakage.
That is, the intensity of variation of each state parameter and relation and the change of coolant disappearance degree can be determined by experiment
Rule, determines rational preset value so as to be respectively each state parameter.For example, the preset value of each state parameter can be right
More significantly coolant lacks degree to capacities of the Ying Yu to air conditioning system.Then, identical environment is subsequently being reached again
During temperature T, when the deviation between the state parameter data for gathering again and benchmark data reaches corresponding preset value, you can draw
The conclusion of coolant leakage.
In the method for the present invention, ambient temperature T may not necessarily be determined in advance, but take random manner to determine,
For example, after stable operation is first powered on (or after time of operation determination), you can with acquisition state supplemental characteristic, and specify this
When ambient temperature be T, hereafter, as long as reaching identical ambient temperature again, you can acquisition state parameter again
Data.
It is preferable, however, that ambient temperature T for acquisition state parameter can also be first set before step S10,
So as to, after air conditioning system start operation, when ambient temperature reaches T first, just execution step S10.
For this purpose, before step S10, also including step：
S00, selected ambient temperature T, and the moment that ambient temperature is T is set to into data collection point.So as to,
When ambient temperature reaches data collection point first, execution step S10；When ambient temperature reaches data acquisition again
During point, then execution step S20, also, often reach once, then repeat once.
Preferably, in step S00, multiple different data collection points can be set, different extraneous rings are corresponded respectively to
Border temperature Ti, i=1,2,3 ....
As the ambient temperature in any area residing for air conditioning system can all have a relatively wide scope, therefore,
Multiple different temperature spots can be chosen in the range of this, so that it is determined that multiple separate data collection points, extraneous ring
As long as border temperature reaches some data collection point, just execution step S10 or step S20, gather corresponding state parameter, this
Sample, just can obtain more state parameter data.And in step s 30 when being contrasted, only by same data collection point
The current measured data of (i.e. same ambient temperature) is contrasted with its benchmark data.
By arranging multiple data collection points, the external environment temperature selected during only one data collection point can be prevented effectively from
Spend in problem that is extreme, causing to be difficult to reach again in the future.In addition, being sentenced according to the multi-group data of multiple data collection points
It is disconnected, also so that testing result more fully with it is objective.
Preferably, in step S00, the on-site ambient temperature range of air conditioning system, for example, annual minimum temperature are collected first
TminWith annual maximum temperature TmaxBetween scope, specify a data collection point, k every k DEG C in the ambient temperature range
For predetermined temperature interval.
That is, in order to more comprehensively reflect state parameter situation of the air conditioning system under various temperature conditionss, can be located
Multiple data collection points are selected in the long-term average temperature range on ground.Specifying for data collecting point is set also dependent on practical situation
Fixed, k value arranges less, and the data of collection are more, more favourable to detecting secondary refrigerant leakage situation.
Preferably, in step S00, the Internet can be accessed by the communication module of air conditioning system, to collect air conditioning system
On-site ambient temperature range.For the air conditioning system for being provided with communication module, can easily obtain after installation
The temperature data of needs.
Alternatively, in step S00, it is also possible to the on-site ambient temperature of air conditioning system is collected by way of being manually entered
Scope.For example, in installation, installation personnel can be manually entered the annual minimum temperature T of locality in debugging processminWith year most
High-temperature TmaxEtc. data.
Alternatively, in step S00, can also be and one or more regional environment are prestored before air conditioning system is dispatched from the factory
Temperature range.For example, before dispatching from the factory, related personnel can collect the day destiny in various places (the especially target marketing area of air-conditioning)
According to such as annual minimum temperature TminWith annual maximum temperature TmaxDeng, and store it in unit.
Preferably, in step S10, the rate of load condensate of air conditioning system when record gathers the state parameter of air conditioning system first；Step
It is in rapid S20, when ambient temperature reaches T again, only identical with the rate of load condensate in step S10 in the rate of load condensate of air conditioning system
When, the state parameter of air conditioning system is gathered again.
That is, for multiple on-line system, due to the different moment, load (the indoor set number for putting into operation of starting shooting
Measure) may be different, and in the case of start load difference, the state parameter of air conditioning system is clearly different, thus this
Bright method needs to consider start load that otherwise, Data Comparison just loses meaning.For this purpose, in the method for the present invention, adopting first
Rate of load condensate (such as the quantity of indoor set start) at that time is recorded during collection data, hereafter, when outdoor environment temperature reaches T again
When, first judge current rate of load condensate, only rate of load condensate is identical, just can acquisition state data again, with the accuracy for ensureing to detect.
Preferably, in step S40, the correspondence when preset value reaches 30%-35% for coolant disappearance amount in air conditioning system
State parameter and benchmark data between deviation.It is demonstrated experimentally that when coolant disappearance amount reaches 30%-35%, for sky
The capacity of adjusting system is obvious.
Describe a preferred implementation of the method for the present invention below in conjunction with Fig. 2 in detail：
(1) start
(2) collect local environment temperature data
For example, (need to be by air conditioning unit built-in communication module) be collected in the Internet：Collect local environment temperature change model
Enclose, such as minimum temperature is Tmin, maximum temperature is Tmax, range of temperature Tmin～Tmax。
Or, unit is built-in before dispatching from the factory：Before dispatching from the factory, related personnel collects various places weather data and stores in unit.
If somewhere variation of ambient temperature scope is 0 DEG C to 32 DEG C, i.e. Tmin=0 DEG C, Tmax=32 DEG C.
(3) data collecting point is specified
For example, a data collecting point is specified every k DEG C, total data collecting point is (Tmax-Tmin)/k.As k takes 4, then,
Data collecting point can be set to 0 DEG C, 4 DEG C, 8 DEG C, 12 DEG C, 16 DEG C, 20 DEG C, 24 DEG C, 28 DEG C, 32 DEG C of totally 9 points.
(4) data collection
After ambient temperature reaches data collecting point, start collection data and (for example can also point out user to carry out data receipts
Collection), indoor is run according to preset temperature, stores the data of collection (such as compressor frequency, pressure at expulsion, suction after set steady
Atmospheric pressure, delivery temperature, electronic expansion valve opening, indoor heat exchanger enter the pipe degree of superheat, the indoor heat exchanger outlet pipe degree of superheat and/
Or air conditioning capacity rate etc.), the first secondary data that wherein each temperature spot is collected is used as benchmark data.
Such as when temperature reaches 28 DEG C for the first time, first time data collection, the stable rear data storage collected are opened
On the basis of data；The data of n-th data collection (n=2,3 ...) are for being contrasted with benchmark data.
(5) data are calculated
The data collected for the second time or below and the data collected for the first time are contrasted, and data are collected behind calculating parameter
The deviation of the data collected with first time.
(6) coolant leakage whether judgement
Deviation according to calculating is contrasted with preset value, and whether judgment bias are more than preset value.
(7) report coolant miss fault
When there is deviation more than preset value, system cold medium shortage is illustrated, i.e. secondary refrigerant leakage amount is exceeded, report coolant miss fault.
In order to prove the feasibility of the method for the present invention, lack for the shape of air conditioning system below by way of experimental verification coolant
The impact of state parameter.
Experiment condition：Some 16kW unit, the refrigerating operaton under nominal condition full load, and do subtract coolant experiment, inspection
Coolant quantity is surveyed for compressor frequency, pressure at expulsion (i.e. high pressure), pressure of inspiration(Pi) (i.e. low pressure), delivery temperature, electric expansion valve
Aperture (i.e. interior machine EXV), indoor heat exchanger enter the pipe degree of superheat, the indoor heat exchanger outlet pipe degree of superheat, and/or air conditioning capacity rate (i.e.
The ratio of actual measurement ability and nominal capacity), wherein, the data collecting point for setting is 35 DEG C.
During experiment, when ambient temperature reaches 35 DEG C, unit operation stably carries out first time data collection, is designated as state A,
And this secondary data is designated as into the benchmark data of the data collecting point (35 DEG C), the benchmark data of above-mentioned each parameter is stored.
When follow-up second ambient temperature reaches mutually synthermal (35 DEG C), start second data collection, and with first
The benchmark data of secondary storage is contrasted, and if beyond deviation preset value is designated as coolant leakage.If without departing from deviation preset value
It is then follow-up to continue detection.In order to shorten experimentation, when follow-up data is collected, coolant is artificially gradually reduced, is designated as respectively
State B, C, D, E and F.
The result of every state parameter is as shown in table 1.
Table 1：Experimental result
From experimental result as can be seen that with the reduction degree of coolant leakage (correspondence different) of coolant quantity, in same isothermal
Under degree condition, same rate of load condensate, compressor frequency is substantially presented the trend of reduction, and pressure at expulsion and pressure of inspiration(Pi) are substantially presented
Downward trend, delivery temperature and interior machine electronic expansion valve opening are substantially presented the trend of increase, enter the pipe degree of superheat and substantially present
Downward trend, the outlet pipe degree of superheat are substantially presented the trend of rising, and the energy power rate of air conditioning system is then presented obvious downward trend.
Therefore, by detecting one or more in these state parameters, just clearly coolant quantity can be judged whether
Decline, and substantially judge the degree of coolant quantity decline.
In addition, as shown in table 1, state B represents the coolant of leakage 20%, but actually to air conditioning system cooling/heating amount
Affect and little；And after coolant leakage 35% (state C), energy power rate only has initial 76% or so, affect larger.Therefore, may be used
Using by state C as a comparison point, the preset value of determination deviation amount, when departure shows that coolant leakage meets or exceeds C-shaped
During state, then coolant leakage is designated as.
On the basis of above-mentioned work, present invention also offers a kind of air conditioning system, which adopts the present invention foregoing
Whether method detection coolant leaks.
The air conditioning system of the present invention can detect coolant leakage degree exactly, be both difficult to report by mistake, be not easy to fail to report, and detect
Reliable results, system run all right.
Those skilled in the art is it is easily understood that on the premise of not conflicting, above-mentioned each preferred version can be free
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is only illustrative, and not restrictive, without departing from the basic of the present invention
In the case of principle, those skilled in the art can be directed to the modification of the various obvious or equivalent that above-mentioned details is made or replace
Change, be all included in scope of the presently claimed invention.
Claims (10)
1. it is a kind of detection air conditioning system coolant leakage method, it is characterised in that including step：
S10, in air conditioning system running, ambient temperature be T when, gather air conditioning system state parameter, and will
Data on the basis of the data storage for collecting first at this temperature；
S20, the state in air conditioning system running, when ambient temperature reaches T again, gathering air conditioning system again
Parameter；
S30, the data for collecting again are contrasted with the benchmark data, calculated deviation therebetween；
S40, when the deviation exceed preset value when, be judged as coolant leakage.
2. method according to claim 1, it is characterised in that the state parameter of the air conditioning system includes compressor frequency
Rate, pressure at expulsion, pressure of inspiration(Pi), delivery temperature, electronic expansion valve opening, indoor heat exchanger enter the pipe degree of superheat, indoor heat exchanger
The outlet pipe degree of superheat, and/or air conditioning capacity rate.
3. method according to claim 2, it is characterised in that when compressor frequency decrease beyond preset value, pressure at expulsion
It decrease beyond preset value, drop of suction pressure to be increased beyond on preset value, electronic expansion valve opening more than preset value, delivery temperature
To rise enter the pipe degree of superheat more than preset value, indoor heat exchanger and decrease beyond preset value, the indoor heat exchanger outlet pipe degree of superheat and be increased beyond
When preset value, and/or air conditioning capacity rate decrease beyond preset value, it is judged as coolant leakage.
4. method according to claim 1, it is characterised in that before step S10, also including step：
S00, selected ambient temperature T, and the moment that ambient temperature is T is set to into data collection point.
5. method according to claim 4, it is characterised in that in step S00, arranges multiple different data collection points,
Correspond respectively to different ambient temperatures Ti。
6. method according to claim 5, it is characterised in that in step S00, collects the on-site ring of air conditioning system first
Border temperature range, specifies a data collection point every k DEG C in the ambient temperature range, and k is predetermined temperature interval.
7. method according to claim 6, it is characterised in that in step S00, is accessed by the communication module of air conditioning system
The on-site ambient temperature range of air conditioning system is collected in the Internet, or, air conditioning system institute is collected by way of being manually entered
In the ambient temperature range on ground, or, air conditioning system prestores one or more regional ambient temperature ranges before dispatching from the factory.
8. method according to claim 1, it is characterised in that in step S10, record gather the state of air conditioning system first
The rate of load condensate of air conditioning system during parameter；In step S20, when ambient temperature reaches T again, only in the load of air conditioning system
When rate is identical with the rate of load condensate in step S10, the state parameter of air conditioning system is gathered again.
9. the method according to one of claim 1-8, it is characterised in that in step S40, the preset value are air conditioning system
Middle coolant disappearance amount reaches deviation during 30%-35% between corresponding state parameter and benchmark data.
10. a kind of air conditioning system, it is characterised in that whether leaked using the method detection coolant described in one of claim 1-9.
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107576112A (en) * | 2017-09-19 | 2018-01-12 | 青岛海尔空调器有限总公司 | Detection method and device, air-conditioning for refrigerant leakage |
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| CN109114747A (en) * | 2018-08-03 | 2019-01-01 | 奥克斯空调股份有限公司 | A kind of lack of fluorine of air-conditioners detection method, detection system and air-conditioning |
| CN110878985B (en) * | 2018-09-06 | 2021-05-18 | 奥克斯空调股份有限公司 | Method and device for detecting refrigerant leakage of air conditioner |
| CN110878985A (en) * | 2018-09-06 | 2020-03-13 | 奥克斯空调股份有限公司 | Method and device for detecting refrigerant leakage of air conditioner |
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