CN105092220B - The fault detection method and device of low temperature valve are crossed in supercooling apparatus - Google Patents
The fault detection method and device of low temperature valve are crossed in supercooling apparatus Download PDFInfo
- Publication number
- CN105092220B CN105092220B CN201410191546.XA CN201410191546A CN105092220B CN 105092220 B CN105092220 B CN 105092220B CN 201410191546 A CN201410191546 A CN 201410191546A CN 105092220 B CN105092220 B CN 105092220B
- Authority
- CN
- China
- Prior art keywords
- temperature
- difference
- main flow
- low temperature
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses the fault detection method and device that low temperature valve is crossed in a kind of supercooling apparatus, methods described includes：The main flow that cold heat exchanger was detected every preset time enters temperature value and main flow goes out temperature value, until detection number reaches preset times, and the main flow according to corresponding to each detection enters temperature value and main flow goes out temperature value and judged whether low temperature valve occurs exception；When having served as low temperature valve and occurring abnormal, controlled low temperature valve to open to the first aperture and obtained the first temperature difference, and controlled that low temperature valve is opened to the second aperture and to obtain second temperature poor；Judge whether the difference between the first temperature difference and second temperature difference is less than or equal to predetermined threshold value；And when the difference between the first temperature difference and second temperature difference is less than or equal to predetermined threshold value, judged that low temperature valve broke down.The method of the embodiment of the present invention, the various faults of low temperature valve can be detected, that is, improve the satisfaction of user, and turn avoid the further damage of air conditioner.
Description
Technical field
The present invention relates to air conditioner technical field, in more particularly to a kind of supercooling apparatus cross low temperature valve fault detection method and
Device.
Background technology
In field of central air-conditioning, multi-joint unit with its it is applied widely, application scenario is more the advantages of it is blue or green increasingly by market
Look at.It is known that multi-joint unit capacity loss in the case of Super long tube is more.Flashed to retrieve refrigerant in Super long tube
Caused capacity loss, while also to eliminate the noise problem that two phase flow is brought, solved more and more using supercooling in the industry
Certainly above mentioned problem.And instantly, but lack for commonly used low temperature valve (being a kind of electric expansion valve) of crossing in supercooling apparatus
Effective fault detect, anticipation, alarm method.
Although occurring the fault detection method of some electric expansion valves in correlation technique, these methods can only be based on electricity
Sub- expansion valve portion specific fault reason detects and judges electric expansion valve failure, and electric expansion valve caused by other reasons
Failure can not be detected.For example, proposing a kind of wire break detection method of stepper motor in correlation technique, this method is inspection
Survey stepper motor electric signal and this signal is fed back into control section, control section reads value of feedback and makes fault diagnosis.This
Kind method can only detect electric expansion valve stepper motor line fault, and other failures (such as valve body step-out, stuck etc.) are with regard to nothing
From detection, more leisure opinion is optimized to system by the suitable regulation of valve body, protected, so as to cause poor user experience.As for knot
Supercooling apparatus actual conditions are closed to judge low temperature valve failure, in the industry at present also in space state.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention
First purpose is crossing the fault detection method of low temperature valve in a kind of supercooling apparatus is proposed.This method can detect low temperature valve
Various faults, that is, the satisfaction of user is improved, turn avoid the further damage of air conditioner.
Second object of the present invention is crossing the failure detector of low temperature valve in a kind of supercooling apparatus is proposed.
To achieve these goals, the fault detect side of low temperature valve is crossed in the supercooling apparatus of first aspect present invention embodiment
Method, comprise the following steps：The main flow that cold heat exchanger was detected every preset time enters temperature value and main flow goes out temperature value, until inspection
Survey number and reach preset times, and the main flow according to corresponding to each detection enters temperature value and the main flow goes out temperature value and judged
Cross whether low temperature valve occurs exception；When it is described cross low temperature valve and occur abnormal when, control the low temperature valve of crossing to open to the first aperture and obtain the
One temperature difference, and control it is described cross that low temperature valve is opened to the second aperture and to obtain second temperature poor, wherein, first temperature difference is institute
Stated low temperature valve and open that main flow during to the first aperture goes out temperature value and the main flow enters difference between temperature value, second temperature
Degree difference opens that main flow during to the second aperture goes out temperature value and the main flow enters difference between temperature value for the low temperature valve of crossing；Sentence
Whether disconnected difference between first temperature difference and the second temperature difference is less than or equal to predetermined threshold value；And when described
When difference between one temperature difference and the second temperature difference is less than or equal to predetermined threshold value, judge that event occurs for the low temperature valve of crossing
Barrier.
In supercooling apparatus according to embodiments of the present invention cross low temperature valve fault detection method, detected cold heat exchanger import with
Temperature difference between outlet, and the temperature difference obtained according to continuous preset times time detection judged whether low temperature valve occurs exception, with
And when judging that low temperature valve occurred abnormal, controlled low temperature valve to open to the first aperture and obtained the first temperature difference, and controlled low temperature valve
Open to the second aperture and to obtain second temperature poor, then judged whether low temperature valve occurs according to the first temperature difference and second temperature difference
Failure, this method can detect the various faults (step-out, stuck, impurity blocking, asynchronous machine open circuit etc.) of low temperature valve, be easy to
User or after sale personnel, which follow up, to be repaired and safeguards, prevents air conditioner longtime running in the case of low temperature valve failure is crossed from causing air conditioner to enter
The damage of one step, that is, the satisfaction for improving user extend the service life of air conditioner again.
In one embodiment of the invention, the main flow enters temperature value and enters the acquisition of temperature-sensitive bag, the main flow by main flow
Enter temperature-sensitive bag and be arranged on the entrance of the mistake cold heat exchanger and not after the low temperature valve excessively, the main flow goes out temperature value and passes through main flow
Go out the acquisition of temperature-sensitive bag, the main flow goes out temperature-sensitive bag and is arranged on the outlet for crossing cold heat exchanger.
In one embodiment of the invention, the acquisition main flow enters temperature value and specifically included：Detect pressure sensing
The pressure value of device, the pressure sensor are arranged on the entrance of cold heat exchanger excessively and not after the low temperature valves excessively；According to institute
State the pressure value acquisition main flow and enter temperature.
In one embodiment of the invention, the main flow corresponding to detection enters temperature value and the master to the basis every time
Outflow temperature judged whether low temperature valve occurs abnormal specifically include：Obtain the main flow corresponding to detection every time and go out temperature value
Enter the difference between temperature value with the main flow；The degree of deviation is obtained according to the difference and preset temperature difference, and according to every two
The difference corresponding to secondary detection obtains change degree；When the degree of deviation is all higher than predetermined deviation degree threshold value and the change degree
When respectively less than presetting change degree threshold value, judge that exception occurs for the low temperature valve of crossing.
In one embodiment of the invention, the difference when between first temperature difference and the second temperature difference
During less than or equal to predetermined threshold value, judge that the low temperature valve excessively breaks down and specifically include：When first temperature difference and described the
When difference between two temperature differences is less than or equal to predetermined threshold value, the low temperature valve of crossing is controlled to open and close k times repeatedly, k is big
In the integer equal to 1；Control the low temperature valve of crossing to open to first aperture and obtain first temperature difference, and control the mistake
Low temperature valve is opened to second aperture and to obtain the second temperature poor；And when first temperature difference and the second temperature are poor
Between difference still less than or equal to the predetermined threshold value when, judge it is described cross low temperature valve break down.
In one embodiment of the invention, in addition to：Show fault message or carry out failure prompting, to prompt user to enter
Row maintenance.
In one embodiment of the invention, in addition to：When between first temperature difference and the second temperature difference
When difference is more than the predetermined threshold value, judge that the low temperature valve of crossing recovers normal.
In one embodiment of the invention, the degree of deviation obtains according to following formula：
D=| Δ Ts- Δs Tni|/Δ Ts,
Wherein, d is the degree of deviation, and Δ Ts is the preset temperature difference, Δ TniDescribed in corresponding to ith detection
Main flow goes out temperature value and the main flow enters difference between temperature value, Δ Tni=TOni-TIni, TOniWhen being detected for ith
The main flow goes out temperature value, TIniMain flow when being detected for ith enters temperature value, and wherein i is integer, and 1≤i≤m, m
For the preset times.
In one embodiment of the invention, the change degree obtains according to following formula：
C=| Δ Tni-ΔTnj|/ΔTni,
Wherein, c is the change degree, Δ TniGo out temperature value for the main flow corresponding to ith detection with the main flow to enter
Difference between temperature value, Δ Tni=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIniFor i-th
Main flow during secondary detection enters temperature value, Δ TnjGo out temperature value for the main flow corresponding to jth time detection with the main flow to enter
Difference between temperature value, Δ Tnj=TOnj-TInj, TOnjMain flow when being detected for jth time goes out temperature value, TInjFor jth
Main flow during secondary detection enters temperature value, and wherein i, j are integer, and 1≤i, j≤m, i ≠ j, m are the preset times.
In one embodiment of the invention, the low temperature valve of crossing is electric expansion valve.
To achieve these goals, the fault detect dress of low temperature valve is crossed in the supercooling apparatus of second aspect of the present invention embodiment
Put, including：Detection module, the main flow for detecting cold heat exchanger every preset time enters temperature value and main flow goes out temperature value,
Until detection number reaches preset times；Abnormal judge module, enter temperature value for the main flow according to corresponding to detection every time
Go out temperature value with the main flow and judged whether low temperature valve occurs exception；Control module, for when it is described cross low temperature valve occur it is abnormal when,
Control the low temperature valve of crossing to open to the first aperture and obtain the first temperature difference, and control the low temperature valve of crossing to open to the second aperture and obtain
Second temperature is poor, wherein, the main flow goes out temperature value and institute when first temperature difference is opened to the first aperture for the mistake low temperature valve
State main flow and enter difference between temperature value, the second temperature difference crosses main flow when low temperature valve is opened to the second aperture and go out temperature to be described
Angle value and the main flow enter the difference between temperature value；Judge module, for judging first temperature difference and the described second temperature
Whether the difference between degree difference is less than or equal to predetermined threshold value；And breakdown judge module, for when first temperature difference with
When difference between the second temperature difference is less than or equal to predetermined threshold value, judge that the low temperature valve of crossing breaks down.
The failure detector of low temperature valve is crossed in supercooling apparatus according to embodiments of the present invention, is detected and is subcooled by detection module
Temperature difference between heat exchanger import and outlet, the temperature difference that abnormal judge module obtains according to continuous preset times time detection are sentenced
Whether the low temperature valve that broke occurs exception, and when judging that low temperature valve occurred abnormal, control module controlled low temperature valve to open to first and opened
Spend and obtain the first temperature difference, and controlled that low temperature valve is opened to the second aperture and to obtain second temperature poor, then breakdown judge module
Judged whether low temperature valve breaks down according to the first temperature difference and second temperature difference, the device can detect a variety of of low temperature valve
Failure (step-out, stuck, impurity blocking, asynchronous machine open circuit etc.), it is easy to user or after sale personnel's follow-up maintenance and safeguards, prevent
Air conditioner longtime running in the case of low temperature valve failure is crossed causes air conditioner further to damage, that is, improves the satisfaction of user again
Extend the service life of air conditioner.
In one embodiment of the invention, the abnormal judge module includes：First acquisition unit, it is described for obtaining
The main flow corresponding to detection goes out temperature value every time and the main flow enters difference between temperature value；Second acquisition unit, it is used for
The degree of deviation is obtained according to the difference and preset temperature difference, and corresponding difference acquisition change is detected twice according to every
Degree；Abnormal deciding means, for being respectively less than default become when the degree of deviation is all higher than predetermined deviation degree threshold value and the change degree
During change degree threshold value, judge that exception occurs for the low temperature valve of crossing.
In one embodiment of the invention, the breakdown judge module includes：First control unit, for when described
When difference between one temperature difference and the second temperature difference is less than or equal to predetermined threshold value, the low temperature valve of crossing is controlled to open repeatedly
And close k times, k is the integer more than or equal to 1；Second control unit, for controlling the low temperature valve of crossing to open to first aperture
And first temperature difference is obtained, and control and described cross that low temperature valve is opened to second aperture and to obtain the second temperature poor；With
And breakdown judge unit, for when the difference between first temperature difference and the second temperature difference is still less than or equal to described
During predetermined threshold value, judge that the low temperature valve of crossing breaks down.
In one embodiment of the invention, in addition to：Fault cues module, for showing fault message or carrying out failure
Remind, to prompt user to be repaired.
In one embodiment of the invention, the breakdown judge unit is additionally operable to, when first temperature difference with it is described
When difference between second temperature difference is more than the predetermined threshold value, judge that the low temperature valve of crossing recovers normal.
In one embodiment of the invention, the degree of deviation obtains according to following formula：
D=| Δ Ts- Δs Tni|/Δ Ts,
Wherein, d is the degree of deviation, and Δ Ts is the preset temperature difference, Δ TniDescribed in corresponding to ith detection
Main flow goes out temperature value and the main flow enters difference between temperature value, Δ Tni=TOni-TIni, TOniWhen being detected for ith
The main flow goes out temperature value, TIniMain flow when being detected for ith enters temperature value, and wherein i is integer, and 1≤i≤m, m
For the preset times.
In one embodiment of the invention, the change degree obtains according to following formula：
C=| Δ Tni-ΔTnj|/ΔTni,
Wherein, c is the change degree, Δ TniGo out temperature value for the main flow corresponding to ith detection with the main flow to enter
Difference between temperature value, Δ Tni=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIniFor i-th
Main flow during secondary detection enters temperature value, Δ TnjGo out temperature value for the main flow corresponding to jth time detection with the main flow to enter
Difference between temperature value, Δ Tnj=TOnj-TInj, TOnjMain flow when being detected for jth time goes out temperature value, TInjFor jth
Main flow during secondary detection enters temperature value, and wherein i, j are integer, and 1≤i, j≤m, i ≠ j, m are the preset times.
In one embodiment of the invention, the low temperature valve of crossing is electric expansion valve.
Brief description of the drawings
Fig. 1 is the flow chart for the fault detection method that low temperature valve is crossed in supercooling apparatus according to an embodiment of the invention；
Fig. 2 (a) is the structural representation of supercooling apparatus according to an embodiment of the invention；
Fig. 2 (b) is the structural representation of supercooling apparatus in accordance with another embodiment of the present invention；
Fig. 3 is that main flow corresponding to detection enters temperature value to basis according to an embodiment of the invention every time and main flow goes out temperature
Judged whether low temperature valve occurs abnormal flow chart；
Fig. 4 is according to an embodiment of the invention when the difference of the first temperature difference and second temperature difference is less than or equal in advance
If during threshold value, judged the flow chart that low temperature valve breaks down；
Fig. 5 is the structural representation for the failure detector that low temperature valve is crossed in supercooling apparatus according to an embodiment of the invention
Figure；
Fig. 6 is the structural representation for the failure detector that low temperature valve is crossed in supercooling apparatus according to an embodiment of the invention
Figure；
Fig. 7 is the structural representation for the failure detector that low temperature valve is crossed in supercooling apparatus in accordance with another embodiment of the present invention
Figure；
Fig. 8 is the structural representation for the failure detector that low temperature valve is crossed in the supercooling apparatus according to another embodiment of the invention
Figure.
Reference：Detection module 100, abnormal judge module 200, control module 300, judge module 400, breakdown judge
Module 500, first acquisition unit 210, second acquisition unit 220, abnormal deciding means 230, the first control unit 510, second
Control unit 520, breakdown judge unit 530, fault cues module 600.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the fault detect detection method of mistake low temperature valve in supercooling apparatus according to embodiments of the present invention is described
And device.
Fig. 1 is the flow chart for the fault detection method that low temperature valve is crossed in supercooling apparatus according to an embodiment of the invention.Such as
Shown in Fig. 1, the fault detection method that low temperature valve is crossed in the supercooling apparatus of the embodiment of the present invention comprises the steps.
S101, the main flow that cold heat exchanger was detected every preset time enter temperature value and main flow goes out temperature value, until detection
Number reaches preset times, and the main flow according to corresponding to each detection enters temperature value and main flow goes out whether temperature value judged low temperature valve
Generation is abnormal.
Specifically, there is supercooling apparatus in the indoor set or outdoor unit of air conditioner.When the working condition of air conditioner is refrigeration
When state or heating state, refrigerant flow direction is opposite in supercooling apparatus.
In one embodiment of the invention, it is electric expansion valve to cross low temperature valve.
The failure of mistake low temperature valve in the supercooling apparatus of the embodiment of the present invention is described by taking the refrigerating state of air conditioner as an example below
Detection method.
In one embodiment of the invention, the main flow of cold heat exchanger excessively enters temperature value and enters the acquisition of temperature-sensitive bag by main flow,
Main flow enters temperature-sensitive bag and was arranged on the entrance of cold heat exchanger and not after low temperature valve is crossed, and main flow goes out temperature value and goes out temperature-sensitive bag by main flow
Obtain, main flow goes out the outlet that temperature-sensitive bag was arranged on cold heat exchanger.
Specifically, as Fig. 2 (a) show the structural representation of supercooling apparatus, wherein, temperature-sensitive bag is flowed out based on 10,11 are
Main flow enters temperature-sensitive bag, and 12 be main electric expansion valve, and 13 be low temperature valve, and 14 be cold heat exchanger.It is outdoor during refrigerating operaton
Valve opening is subcooled according to predetermined programme-control in machine.
Specifically, during the normal refrigerating operaton of air conditioner, propulsion over time, the aperture for crossing low temperature valve is change
, main flow enters temperature value and main flow to go out temperature value be also change.During the refrigerating operaton of air conditioner, with the equal time
Interval (i.e. preset time), which detects main flow and enters the main flow of temperature-sensitive bag 11, enters temperature value TIn and main flow goes out the main flow of temperature-sensitive bag 10 and goes out temperature
Angle value TOn, until detection number reaches preset times.For example, preset time can be 1min, preset times can be 10 times,
So total detection time is 10 minutes.More specifically, if crossing low temperature valve exception occurs, cold heat exchanger 14 typically occurred
The temperature difference (i.e. main flow goes out temperature value and main flow enters difference between temperature value) long-time between import and outlet does not change or micro-
Change and the temperature difference between import and outlet deviates setting value always.It is possible to the main flow according to corresponding to each detection enters
Temperature value and main flow go out temperature value to judge whether low temperature valve occurs exception.For example, continuously it have detected 10 times, if supercooling every time
The temperature difference between the import and outlet of heat exchanger 14 hardly changes or the temperature difference between microvariations and each import and outlet
All deviate setting value, then just illustrating low temperature valve, there occurs exception.
In another embodiment of the present invention, cross cold heat exchanger main flow enter temperature value can be by pressure sensor
Pressure value converts to obtain, and pressure sensor was arranged on the entrance of cold heat exchanger and not after low temperature valve is crossed.As Fig. 2 (b) is shown
The structural representation of supercooling apparatus, wherein, temperature-sensitive bag is flowed out based on 10,11 be pressure sensor, and 12 be main electric expansion valve, 13
To cross low temperature valve, 14 be cold heat exchanger.Specifically, the pressure value of pressure sensor 11 is detected first, and then basis detects
Pressure value calculates corresponding saturation temperature value, i.e. main flow enters temperature value.The main flow obtained in this way enters temperature value
It is more accurate.
S102, when having served as low temperature valve and occurring abnormal, controlled low temperature valve to open to the first aperture and obtained the first temperature difference, and controlled
Cross that low temperature valve is opened to the second aperture and to obtain second temperature poor, wherein, the first temperature difference was that low temperature valve is opened to main flow during the first aperture
Go out temperature value and main flow enters difference between temperature value, second temperature difference was that low temperature valve is opened to main flow during the second aperture and goes out temperature value
Enter the difference between temperature value with main flow.
Specifically, for example, served as low temperature valve occur it is abnormal when, controlling low temperature valve to open, (minimum aperture, is designated as to the first aperture
EVmin) and the first temperature difference (being designated as Δ Tmin) is obtained, and controlled low temperature valve to open to the second aperture and (maximum opening, be designated as
EVmax) and to obtain second temperature poor (being designated as Δ Tmax).Wherein, the first temperature difference was that low temperature valve is opened to main flow during minimum aperture
Go out temperature value and main flow enters difference between temperature value, second temperature difference was that low temperature valve is opened to main flow during maximum opening and goes out temperature value
Enter the difference between temperature value with main flow.
S103, judges whether the difference between the first temperature difference and second temperature difference is less than or equal to predetermined threshold value.
Specifically, for example, judging whether the first temperature difference and second temperature difference meet | Δ Tmax- Δs Tmin |≤c1, its
In, c1 is predetermined threshold value, and c1 is a smaller value.
S104, when the difference between the first temperature and second temperature difference is less than or equal to predetermined threshold value, judged low temperature valve
Break down.
Specifically, as | Δ Tmax- Δs Tmin | during≤c1, judged that low temperature valve broke down, lost for example, crossing low temperature valve and being in
The unadjustable states such as step, stuck, impurity blocking, asynchronous machine open circuit.
The fault detection method for crossing low temperature valve for being used for air conditioner of the embodiment of the present invention, detected cold heat exchanger import with going out
Temperature difference between mouthful, and the temperature difference obtained according to continuous preset times time detection judged whether low temperature valve occurs exception, and
When judging that low temperature valve occurred abnormal, controlled low temperature valve to open to the first aperture and obtained the first temperature difference, and controlled low temperature valve to open
To the second aperture and to obtain second temperature poor, then according to the first temperature difference and second temperature difference judged low temperature valve whether occur therefore
Barrier, this method can detect the various faults (step-out, stuck, impurity blocking, asynchronous machine open circuit etc.) of low temperature valve, and be easy to use
Family or after sale personnel, which follow up, to be repaired and safeguards, prevents air conditioner longtime running in the case of low temperature valve failure is crossed from causing air conditioner to enter one
The damage of step, that is, the satisfaction for improving user extend the service life of air conditioner again.
In one embodiment of the invention, as shown in figure 3, the main flow according to corresponding to each detection enters temperature value and main flow
Go out temperature and judged whether low temperature valve occurs exception and specifically include following steps.
S201, obtains that main flow corresponding to detection every time goes out temperature value and main flow enters difference between temperature value.
Specifically, main flow corresponding to ith detection goes out temperature value and main flow enters difference DELTA Tn between temperatureiFor：ΔTni
=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIniMain flow when being detected for ith enters temperature value, its
Middle i is integer, and 1≤i≤m, m are preset times, that is, the preset times detected.
S202, the degree of deviation is obtained according to difference and preset temperature difference, and obtained according to corresponding difference is often detected twice
Take change degree.
In an embodiment of the present invention, the degree of deviation obtains according to following formula (1)：
D=| Δ Ts- Δs Tni|/Δ Ts, (1)
Wherein, d is the degree of deviation, and Δ Ts is preset temperature difference, Δ TniGo out temperature value for main flow corresponding to ith detection
Enter the difference between temperature value, Δ Tn with main flowi=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIni
Main flow when being detected for ith enters temperature value, and wherein i is integer, and 1≤i≤m, m are preset times.
In an embodiment of the present invention, change degree obtains according to following formula (2)：
C=| Δ Tni-ΔTnj|/ΔTni, (2)
Wherein, c is change degree, Δ TniGo out temperature value for main flow corresponding to ith detection and main flow enters between temperature value
Difference, Δ Tni=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIniMain flow when being detected for ith enters
Temperature value, Δ TnjGo out temperature value for main flow corresponding to jth time detection and main flow enters difference between temperature value, Δ Tnj=TOnj-
TInj, TOnjMain flow when being detected for jth time goes out temperature value, TInjMain flow when being detected for jth time enters temperature value, and wherein i, j is equal
For integer, and 1≤i, j≤m, i ≠ j, m are preset times.
S203, when the degree of deviation is all higher than predetermined deviation degree threshold value and change degree is respectively less than default change degree threshold value, judge
Cross low temperature valve and exception occurs.
Specifically, if for continuous m (preset times) secondary detection, detection all meets d >=a every time and (a is default to c≤b
Degree of deviation threshold value, b are default change degree threshold value, and b is minimum a value and a>>When b), that is, heat exchanger during each detection
The temperature difference between the import and outlet of component all deviate setting value (i.e. the import of predetermined deviation degree threshold value a) and heat exchanger assembly with
The temperature difference between outlet hardly changes or microvariations, then just illustrated that low temperature valve may have occurred step-out, stuck, impurity blocks
Or the failure such as asynchronous machine open circuit.
In one embodiment of the invention, as shown in figure 4, be less than when the difference of the first temperature difference and second temperature difference or
During equal to predetermined threshold value, judged that low temperature valve broke down and specifically include following steps.
S301, when the difference of the first temperature and second temperature difference is less than or equal to predetermined threshold value, controlled low temperature valve repeatedly
Open and close k times, k is the integer more than or equal to 1.
Specifically, when the difference of the first temperature and second temperature difference is less than or equal to predetermined threshold value, illustrated at low temperature valve
In the unadjustable state such as step-out, stuck, impurity blocking, asynchronous machine open circuit, then now controlled low temperature valve self repair
It is multiple, that is, controlled low temperature valve to open and close several times repeatedly.
S302, control low temperature valve to open to the first aperture and obtained the first temperature difference, and control low temperature valve to open to the second aperture
And it is poor to obtain second temperature.
Specifically, controlled after low temperature valve opens and close several times repeatedly, controlled low temperature valve to open (i.e. minimum to the first aperture
Aperture EVmin) and the first temperature difference (Δ Tmin) is obtained, and controlled low temperature valve to open to the second aperture (i.e. maximum opening EVmax)
And it is poor (Δ Tmax) to obtain second temperature.
S303, when the difference of the first temperature difference and second temperature difference is still less than or equal to predetermined threshold value, judged low temperature valve
Break down.
Specifically, the difference of the first temperature difference and second temperature difference is compared again | Δ Tmax- Δs Tmin | with predetermined threshold value
C1 size, when the difference of the first temperature difference and second temperature difference still meets | Δ Tmax- Δs Tmin | during≤c1, judged low temperature valve
Break down.
In one embodiment of the invention, in addition to：Preset when the difference of the first temperature difference and second temperature difference is more than
During threshold value, judged that low temperature valve recovered normal.Specifically, if | Δ Tmax- Δs Tmin | ＞ c1, judging low temperature valve recover just
Often.Cross after low temperature valve opens and close several times repeatedly, self-regeneration success, cross low temperature valve and recover normal.
In one embodiment of invention, after judging that low temperature valve broke down, in addition to：Display fault message enters
Row failure is reminded, to prompt user to be repaired.
The fault detection method of low temperature valve is crossed in the supercooling apparatus of the embodiment of the present invention, when the first temperature and second temperature difference
When difference is less than or equal to predetermined threshold value, low temperature valve was controlled to carry out self-regeneration, that is, controlled low temperature valve to open and close repeatedly
Close several times, then another secondary control supercooling valve is opened to the first aperture and obtains the first temperature difference, and controls low temperature valve to open to second
Aperture simultaneously obtains that second temperature is poor, if the difference between the first temperature difference and second temperature difference is still less than or equal to default threshold
Value, then judged that low temperature valve broke down；If the difference between the first temperature difference and second temperature difference becomes greater than predetermined threshold value,
Judged that low temperature valve recovered normal.If air conditioner in the longtime running in the case of low temperature valve failure is crossed, can bring high temperature, high pressure, low
Pressure, a series of problems, such as liquid, oil dilution is returned, so as to cause the further damage of air conditioner, therefore, this method can detect
The failure of low temperature valve, and show fault message after detecting that low temperature valve broke down or carry out failure prompting, he prompts user to enter
Row maintenance, so as to prevent the further damage of air conditioner, improves the satisfaction of user.
Furthermore, it is necessary to illustrate, it is subcooled in the supercooling apparatus that the above describes by taking the refrigerating state of air conditioner as an example
The fault detection method of valve, when air conditioner is in heating state, the fault detection method of low temperature valve is crossed similarly in supercooling apparatus
It is applicable, will not be repeated here.Difference is, when air conditioner is in heating state, refrigerant flow direction is on the contrary, entering when freezing
Mouthful be heat when outlet, refrigeration when outlet be heat when entrance, also be subcooled valve opening be the first aperture, second
Difference during aperture between corresponding the first temperature difference and second temperature difference is different.
In order to realize above-described embodiment, the present invention also proposes to cross the failure detector of low temperature valve in a kind of supercooling apparatus.
Fig. 5 is the structural representation for the failure detector that low temperature valve is crossed in supercooling apparatus according to an embodiment of the invention
Figure.As shown in figure 5, the failure detector of low temperature valve is crossed in the supercooling apparatus of the embodiment of the present invention to be included：It is detection module 100, different
Normal judge module 200, control module 300, judge module 400 and breakdown judge module 500.
In one embodiment of the invention, it is electric expansion valve to cross low temperature valve.
Wherein, for being detected every preset time, the main flow of cold heat exchanger entered temperature value to detection module 100 and main flow goes out
Temperature value, until detection number reaches preset times.
Specifically, there is supercooling apparatus in the indoor set or outdoor unit of air conditioner.When the working condition of air conditioner is refrigeration
When state or heating state, refrigerant flow direction is opposite in supercooling apparatus.
Illustrate and illustrated with the refrigerating state of air conditioner below.
In one embodiment of the invention, the main flow of cold heat exchanger excessively enters temperature value and enters the acquisition of temperature-sensitive bag by main flow,
Main flow enters temperature-sensitive bag and was arranged on the entrance of cold heat exchanger and not after low temperature valve is crossed, and main flow goes out temperature value and goes out temperature-sensitive bag by main flow
Obtain, main flow goes out the outlet that temperature-sensitive bag was arranged on cold heat exchanger.
Specifically, as Fig. 2 (a) show the structural representation of supercooling apparatus, wherein, temperature-sensitive bag is flowed out based on 10,11 are
Main flow enters temperature-sensitive bag, and 12 be main electric expansion valve, and 13 be low temperature valve, and 14 be cold heat exchanger.It is indoor during refrigerating operaton
Valve opening is subcooled according to predetermined programme-control in machine.
Specifically, during the normal refrigerating operaton of air conditioner, propulsion over time, the aperture for crossing low temperature valve is change
, main flow enters temperature value and main flow to go out temperature value be also change.During air conditioner refrigerating operaton, detection module 100 is used
Enter temperature value TIn in the main flow for entering temperature-sensitive bag 11 with equal time interval (i.e. preset time) detection main flow and main flow goes out temperature-sensitive
The main flow of bag 10 goes out temperature value TOn, until detection number reaches preset times.For example, preset time can be 1min, preset secondary
Number can be 10 times, then total detection time is 10 minutes.
In another embodiment of the present invention, cross cold heat exchanger main flow enter temperature value can be by pressure sensor
Pressure value converts to obtain, and pressure sensor was arranged on the entrance of cold heat exchanger and not after low temperature valve is crossed.As Fig. 2 (b) is shown
The structural representation of supercooling apparatus, wherein, temperature-sensitive bag is flowed out based on 10,11 be pressure sensor, and 12 be main electric expansion valve, 13
To cross low temperature valve, 14 be cold heat exchanger.Specifically, the pressure value of pressure sensor 11 is detected first, and then basis detects
Pressure value calculates corresponding saturation temperature value, i.e. main flow enters temperature value.The main flow obtained in this way enters temperature value
It is more accurate.
Abnormal judge module 200 enters temperature value for the main flow according to corresponding to detection every time and main flow goes out temperature value and judged
Whether low temperature valve occurs exception.
Specifically, if crossing low temperature valve exception occurs, the temperature between the import and outlet of cold heat exchanger 14 typically occurred
Long-time does not change or microvariations and import and outlet for difference (i.e. main flow goes out temperature value and main flow enters difference between temperature value)
Between the temperature difference deviate setting value always.So abnormal judge module 200 is used for the main flow according to corresponding to detection every time and enters temperature
Value and main flow go out temperature value to judge whether low temperature valve occurs exception.For example, continuously it have detected 10 times, if supercooling heat exchange every time
The temperature difference between the import and outlet of device 14 hardly changes or the temperature difference between microvariations and each import and outlet is all inclined
From setting value, then just illustrated that there occurs exception for low temperature valve.
When control module 300 occurs abnormal for having served as low temperature valve, controlled low temperature valve to open to the first aperture and obtained the first temperature
Degree is poor, and controls that low temperature valve is opened to the second aperture and to obtain second temperature poor, wherein, the first temperature difference was that low temperature valve is opened to first
Main flow goes out temperature during aperture and main flow enters difference between temperature value, and second temperature difference was that low temperature valve is opened to main flow during the second aperture
Go out temperature and main flow enters difference between temperature value.
Specifically, for example, served as low temperature valve occur it is abnormal when, control module 300 be used for controlled low temperature valve to open to the first aperture
(minimum aperture, be designated as EVmin) and the first temperature difference (being designated as Δ Tmin) is obtained, and controlled low temperature valve to open to the second aperture (most
Big aperture, is designated as EVmax) and to obtain second temperature poor (being designated as Δ Tmax).Wherein, the first temperature difference was that low temperature valve is opened to minimum
Main flow goes out temperature during aperture and main flow enters difference between temperature value, and second temperature difference was that low temperature valve is opened to main flow during maximum opening
Go out temperature and main flow enters difference between temperature value.
It is default whether the difference that judge module 400 is used to judge between the first temperature difference and second temperature difference is less than or equal to
Threshold value.
Specifically, for example, judge module 400 is used to judge whether the first temperature difference and second temperature difference meet | Δ Tmax-
Δ Tmin |≤c1, wherein, c1 is predetermined threshold value, and c1 is a smaller value.
Breakdown judge module 500 is used for when the difference between the first temperature difference and second temperature difference is less than or equal to default threshold
During value, judged that low temperature valve broke down.
Specifically, breakdown judge module 500 is used for as | Δ Tmax- Δs Tmin | during≤c1, judged that low temperature valve broke down,
For example, crossing low temperature valve is in the unadjustable state such as step-out, stuck, impurity blocking, asynchronous machine open circuit.
The failure detector of low temperature valve is crossed in the supercooling apparatus of the embodiment of the present invention, supercooling heat exchange is detected by detection module
Temperature difference between device import and outlet, the temperature difference that abnormal judge module obtains according to continuous preset times time detection judged
Whether low temperature valve occurs exception, and when judging that low temperature valve occurred abnormal, control module controlled low temperature valve to open to the first aperture simultaneously
Obtain the first temperature difference, and controlled that low temperature valve is opened to the second aperture and to obtain second temperature poor, then breakdown judge module according to
First temperature difference and second temperature difference judged whether low temperature valve breaks down, and the device can detect the various faults of low temperature valve
(step-out, stuck, impurity blocking, asynchronous machine open circuit etc.), it is easy to user or after sale personnel's follow-up maintenance and safeguards, prevent air-conditioning
Device longtime running in the case of low temperature valve failure is crossed causes air conditioner further to damage, that is, the satisfaction for improving user extends again
The service life of air conditioner.
In one embodiment of the invention, as shown in fig. 6, abnormal judge module 200 specifically includes：First acquisition unit
210th, second acquisition unit 220 and abnormal deciding means 230.
Wherein, for obtaining, main flow corresponding to detection goes out temperature value to first acquisition unit 210 every time and main flow enters temperature value
Between difference.
Specifically, main flow corresponding to ith detection goes out temperature value and main flow enters difference DELTA Tn between temperatureiFor：ΔTni
=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIniMain flow when being detected for ith enters temperature value, its
Middle i is integer, and 1≤i≤m, m are preset times, that is, the preset times detected.
Second acquisition unit 220 is used to obtain the degree of deviation according to difference and preset temperature difference, and is detected twice according to every
Corresponding difference obtains change degree.
In an embodiment of the present invention, the degree of deviation obtains according to following formula (1)：
D=| Δ Ts- Δs Tni|/Δ Ts, (1)
Wherein, d is the degree of deviation, and Δ Ts is preset temperature difference, Δ TniGo out temperature value for main flow corresponding to ith detection
Enter the difference between temperature value, Δ Tn with main flowi=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIni
Main flow when being detected for ith enters temperature value, and wherein i is integer, and 1≤i≤m, m are preset times.
In an embodiment of the present invention, change degree obtains according to following formula (2)：
C=| Δ Tni-ΔTnj|/ΔTni, (2)
Wherein, c is change degree, Δ TniGo out temperature value for main flow corresponding to ith detection and main flow enters between temperature value
Difference, Δ Tni=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIniMain flow when being detected for ith enters
Temperature value, Δ TnjGo out temperature value for main flow corresponding to jth time detection and main flow enters difference between temperature value, Δ Tnj=TOnj-
TInj, TOnjMain flow when being detected for jth time goes out temperature value, TInjMain flow when being detected for jth time enters temperature value, and wherein i, j is equal
For integer, and 1≤i, j≤m, i ≠ j, m are preset times.
Abnormal deciding means 230 is used for when the degree of deviation is all higher than predetermined deviation degree threshold value and change degree is respectively less than default change
When spending threshold value, it is abnormal to judge that low temperature valve occurred.
Specifically, if for continuous m (preset times) secondary detection, detection all meets d >=a every time and (a is default to c≤b
Degree of deviation threshold value, b are default change degree threshold value, and b is minimum a value and a>>When b), that is, heat exchanger during each detection
The temperature difference between the import and outlet of component all deviate setting value (i.e. the import of predetermined deviation degree threshold value a) and heat exchanger assembly with
The temperature difference between outlet hardly changes or microvariations, then just illustrated that low temperature valve may have occurred step-out, stuck, impurity blocks
Or the failure such as asynchronous machine open circuit.
In one embodiment of the invention, as shown in fig. 7, breakdown judge module 500 includes：First control unit 510,
Second control unit 520 and breakdown judge unit 530.
First control unit 510 is used for when the difference of the first temperature and second temperature difference is less than or equal to predetermined threshold value,
Low temperature valve was controlled to open and close k times repeatedly, k is the integer more than or equal to 1.
Specifically, when the difference of the first temperature and second temperature difference is less than or equal to predetermined threshold value, illustrated at low temperature valve
In the unadjustable state such as step-out, stuck, impurity blocking, asynchronous machine open circuit, then now the first control unit 510 is used to control
Make low temperature valve and carry out self-regeneration, that is, control low temperature valve to open and close several times repeatedly.
Second control unit 520 is used to control low temperature valve to open to the first aperture and obtains the first temperature difference, and controls supercooling
Valve is opened to the second aperture and to obtain second temperature poor.
Specifically, the first control unit 510 was controlled after low temperature valve opens and close several times repeatedly, the second control unit
520 controlled low temperature valve to open to the first aperture (i.e. minimum aperture EVmin) and obtained the first temperature difference (Δ Tmin), and controlled supercooling
Valve is opened to the second aperture (i.e. maximum opening EVmax) and to obtain second temperature poor (Δ Tmax).
Breakdown judge unit 530 is used for the difference when the first temperature difference and second temperature difference still less than or equal to predetermined threshold value
When, judged that low temperature valve broke down.
Specifically, the difference of the first temperature difference and second temperature difference is compared again | Δ Tmax- Δs Tmin | with predetermined threshold value
C1 size, breakdown judge unit 530 are used for when the difference of the first temperature difference and second temperature difference still meets | Δ Tmax- Δs
Tmin | during≤c1, judged that low temperature valve broke down.
In one embodiment of the invention, breakdown judge unit 530 is additionally operable to, when the first temperature difference and second temperature are poor
Between difference when being more than predetermined threshold value, judged that low temperature valve recovered normal.Specifically, if | Δ Tmax- Δs Tmin | ＞ c1,
Breakdown judge unit 530 judged that low temperature valve recovered normal.Cross after low temperature valve opens and close several times repeatedly, self-regeneration success,
Cross low temperature valve and recover normal.
In one embodiment of invention, as shown in figure 8, the failure detector of low temperature valve is crossed in supercooling apparatus also to be included：
Fault cues module 600.Fault cues module 600 is used to show fault message or carries out failure prompting, to prompt user to carry out
Maintenance.
The failure detector of low temperature valve is crossed in the supercooling apparatus of the embodiment of the present invention, when the first temperature and second temperature difference
When difference is less than or equal to predetermined threshold value, the first control unit controlled low temperature valve to carry out self-regeneration, that is, controlled low temperature valve
Open and closed several times repeatedly, then the second control unit controlled low temperature valve to open to the first aperture and obtained the first temperature difference, and
Controlled low temperature valve to open to the second aperture and obtained that second temperature is poor, if the difference between the first temperature difference and second temperature difference is still
Less than or equal to predetermined threshold value, breakdown judge unit then judged that low temperature valve broke down；If the first temperature difference and second temperature are poor
Between difference become greater than predetermined threshold value, breakdown judge unit then judged that low temperature valve recovered normal.If air conditioner is in mistake
Longtime running in the case of low temperature valve failure, high temperature, high pressure, low pressure, time liquid, oily a series of problems, such as diluting can be brought, so as to cause
The further damage of air conditioner, therefore, the device can detect the failure of low temperature valve, and detect that low temperature valve broke down
Fault cues module shows fault message or carries out failure prompting afterwards, to prompt user to be repaired, so as to prevent air conditioner
Further damage, improve the satisfaction of user.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
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 the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (18)
1. the fault detection method of low temperature valve is crossed in a kind of supercooling apparatus, it is characterised in that comprise the following steps：
The main flow that cold heat exchanger was detected every preset time enters temperature value and main flow goes out temperature value, until detection number reaches pre-
If number, and the main flow according to corresponding to each detection enters temperature value and the main flow goes out temperature value and judged whether low temperature valve is sent out
It is raw abnormal；
When it is described cross low temperature valve and occur abnormal when, control the low temperature valve of crossing to open to the first aperture and obtain the first temperature difference, and control
It is described to cross that low temperature valve is opened to the second aperture and to obtain second temperature poor, wherein, first temperature difference is opened to for the low temperature valve of crossing
The main flow goes out temperature value during one aperture and the main flow enters difference between temperature value, and the second temperature difference is the supercooling
Valve opens that main flow during to the second aperture goes out temperature value and the main flow enters difference between temperature value；
Judge whether the difference between first temperature difference and the second temperature difference is less than or equal to predetermined threshold value；And
When the difference between first temperature difference and the second temperature difference is less than or equal to predetermined threshold value, the mistake is judged
Low temperature valve breaks down.
2. the fault detection method of low temperature valve is crossed in supercooling apparatus as claimed in claim 1, it is characterised in that the main flow enters temperature
Angle value enters temperature-sensitive bag by main flow and obtained, and the main flow enters temperature-sensitive bag and is arranged on the entrance for crossing cold heat exchanger and not described
After crossing low temperature valve, the main flow goes out temperature value and goes out the acquisition of temperature-sensitive bag by main flow, and the main flow goes out temperature-sensitive bag and is arranged on the supercooling
The outlet of heat exchanger.
3. the fault detection method of low temperature valve is crossed in supercooling apparatus as claimed in claim 1, it is characterised in that obtain the main flow
Enter temperature value, specifically include：
The pressure value of pressure sensor is detected, the pressure sensor is arranged on the entrance for crossing cold heat exchanger and not described
After crossing low temperature valve；
The main flow is obtained according to the pressure value and enters temperature.
4. the fault detection method of low temperature valve is crossed in supercooling apparatus as claimed in claim 1, it is characterised in that according to each detection
The corresponding main flow enters temperature value and the main flow goes out temperature and judged whether low temperature valve occurs exception, specifically includes：
Obtain that the main flow corresponding to detection every time goes out temperature value and the main flow enters difference between temperature value；
The degree of deviation is obtained according to the difference and preset temperature difference, and corresponding difference acquisition is detected twice according to every
Change degree；
When the degree of deviation is all higher than predetermined deviation degree threshold value and the change degree is respectively less than default change degree threshold value, institute is judged
Stated low temperature valve and exception occurs.
5. the fault detection method of low temperature valve is crossed in the supercooling apparatus as described in claim 1 or 4, it is characterised in that described to work as institute
When stating the difference between the first temperature difference and the second temperature difference and being less than or equal to predetermined threshold value, judge described to cross low temperature valve
Failure specifically includes：
When the difference between first temperature difference and the second temperature difference is less than or equal to predetermined threshold value, the mistake is controlled
Low temperature valve is opened and closed k times repeatedly, and k is the integer more than or equal to 1；
Control the low temperature valve of crossing to open to first aperture and obtain first temperature difference, and control the low temperature valve of crossing to drive to institute
State the second aperture and to obtain the second temperature poor；And
When the difference between first temperature difference and the second temperature difference is still less than or equal to the predetermined threshold value, judge
The low temperature valve of crossing breaks down.
6. the fault detection method of low temperature valve is crossed in supercooling apparatus as claimed in claim 5, it is characterised in that also include：
Show fault message or carry out failure prompting, to prompt user to be repaired.
7. the fault detection method of low temperature valve is crossed in supercooling apparatus as claimed in claim 5, it is characterised in that also include：
When the difference between first temperature difference and the second temperature difference is more than the predetermined threshold value, the supercooling is judged
Valve recovers normal.
8. the fault detection method of low temperature valve is crossed in supercooling apparatus as claimed in claim 4, it is characterised in that the degree of deviation root
Obtained according to following formula：
D=| Δ Ts- Δs Tni|/Δ Ts,
Wherein, d is the degree of deviation, and Δ Ts is the preset temperature difference, Δ TniGo out for the main flow corresponding to ith detection
Temperature value and the main flow enter the difference between temperature value, Δ Tni=TOni-TIni, TOniMaster when being detected for ith
Flow out temperature value, TIniMain flow when being detected for ith enters temperature value, and wherein i is integer, and 1≤i≤m, m are described
Preset times.
9. the fault detection method of low temperature valve is crossed in supercooling apparatus as claimed in claim 4, it is characterised in that the change degree root
Obtained according to following formula：
C=| Δ Tni-ΔTnj|/ΔTni,
Wherein, c is the change degree, Δ TniGo out temperature value for the main flow corresponding to ith detection and enter temperature with the main flow
Difference between value, Δ Tni=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIniExamined for ith
Main flow during survey enters temperature value, Δ TnjGo out temperature value for the main flow corresponding to jth time detection and enter temperature with the main flow
Difference between value, Δ Tnj=TOnj-TInj, TOnjMain flow when being detected for jth time goes out temperature value, TInjFor jth time inspection
Main flow during survey enters temperature value, and wherein i, j are integer, and 1≤i, j≤m, i ≠ j, m are the preset times.
10. the fault detection method of low temperature valve is crossed in supercooling apparatus as claimed in claim 1, it is characterised in that described to cross low temperature valve
For electric expansion valve.
11. the failure detector of low temperature valve is crossed in a kind of supercooling apparatus, it is characterised in that including：
Detection module, the main flow for detecting cold heat exchanger every preset time enters temperature value and main flow goes out temperature value, until
Detection number reaches preset times；
Abnormal judge module, enter temperature value for the main flow according to corresponding to detection every time and the main flow goes out temperature value and judged
Cross whether low temperature valve occurs exception；
Control module, for when it is described cross low temperature valve occur it is abnormal when, control it is described cross low temperature valve open to the first aperture and obtain first
Temperature difference, and control it is described cross that low temperature valve is opened to the second aperture and to obtain second temperature poor, wherein, first temperature difference is described
Cross low temperature valve and open that main flow during to the first aperture goes out temperature value and the main flow enters difference between temperature value, the second temperature
Difference opens that main flow during to the second aperture goes out temperature value and the main flow enters difference between temperature value for the low temperature valve of crossing；
Judge module, for judging it is pre- whether the difference between first temperature difference and the second temperature difference is less than or equal to
If threshold value；And
Breakdown judge module, for being preset when the difference between first temperature difference and the second temperature difference is less than or equal to
During threshold value, judge that the low temperature valve of crossing breaks down.
12. the failure detector of low temperature valve is crossed in supercooling apparatus as claimed in claim 11, it is characterised in that the exception is sentenced
Disconnected module includes：
First acquisition unit, go out temperature value and the main flow for obtaining the main flow corresponding to detection every time and enter temperature value
Between difference；
Second acquisition unit, for obtaining the degree of deviation according to the difference and preset temperature difference, and institute is detected twice according to every
The corresponding difference obtains change degree；
Abnormal deciding means, for being respectively less than default become when the degree of deviation is all higher than predetermined deviation degree threshold value and the change degree
During change degree threshold value, judge that exception occurs for the low temperature valve of crossing.
13. the failure detector of low temperature valve is crossed in the supercooling apparatus as described in claim 11 or 12, it is characterised in that the event
Barrier judge module includes：
First control unit, for being preset when the difference between first temperature difference and the second temperature difference is less than or equal to
During threshold value, the low temperature valve of crossing is controlled to open and close k times repeatedly, k is the integer more than or equal to 1；
Second control unit, for controlling the low temperature valve excessively to open to first aperture and obtain first temperature difference, and control
Make and described cross that low temperature valve is opened to second aperture and to obtain the second temperature poor；And
Breakdown judge unit, for when the difference between first temperature difference and the second temperature difference is still less than or equal to institute
When stating predetermined threshold value, judge that the low temperature valve of crossing breaks down.
14. the failure detector of low temperature valve is crossed in supercooling apparatus as claimed in claim 13, it is characterised in that also include：
Fault cues module, for showing fault message or carrying out failure prompting, to prompt user to be repaired.
15. the failure detector of low temperature valve is crossed in supercooling apparatus as claimed in claim 13, it is characterised in that the failure is sentenced
Disconnected unit is additionally operable to, and when the difference between first temperature difference and the second temperature difference is more than the predetermined threshold value, is sentenced
The disconnected low temperature valve of crossing recovers normal.
16. the failure detector of low temperature valve is crossed in supercooling apparatus as claimed in claim 12, it is characterised in that the degree of deviation
Obtained according to following formula：
D=| Δ Ts- Δs Tni|/Δ Ts,
Wherein, d is the degree of deviation, and Δ Ts is the preset temperature difference, Δ TniGo out for the main flow corresponding to ith detection
Temperature value and the main flow enter the difference between temperature value, Δ Tni=TOni-TIni, TOniMaster when being detected for ith
Flow out temperature value, TIniMain flow when being detected for ith enters temperature value, and wherein i is integer, and 1≤i≤m, m are described
Preset times.
17. the failure detector of low temperature valve is crossed in supercooling apparatus as claimed in claim 12, it is characterised in that the change degree
Obtained according to following formula：
C=| Δ Tni-ΔTnj|/ΔTni,
Wherein, c is the change degree, Δ TniGo out temperature value for the main flow corresponding to ith detection and enter temperature with the main flow
Difference between value, Δ Tni=TOni-TIni, TOniMain flow when being detected for ith goes out temperature value, TIniExamined for ith
Main flow during survey enters temperature value, Δ TnjGo out temperature value for the main flow corresponding to jth time detection and enter temperature with the main flow
Difference between value, Δ Tnj=TOnj-TInj, TOnjMain flow when being detected for jth time goes out temperature value, TInjFor jth time inspection
Main flow during survey enters temperature value, and wherein i, j are integer, and 1≤i, j≤m, i ≠ j, m are the preset times.
18. the failure detector of low temperature valve is crossed in supercooling apparatus as claimed in claim 11, it is characterised in that described to cross low temperature valve
For electric expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410191546.XA CN105092220B (en) | 2014-05-07 | 2014-05-07 | The fault detection method and device of low temperature valve are crossed in supercooling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410191546.XA CN105092220B (en) | 2014-05-07 | 2014-05-07 | The fault detection method and device of low temperature valve are crossed in supercooling apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105092220A CN105092220A (en) | 2015-11-25 |
| CN105092220B true CN105092220B (en) | 2018-03-20 |
Family
ID=54573151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410191546.XA Active CN105092220B (en) | 2014-05-07 | 2014-05-07 | The fault detection method and device of low temperature valve are crossed in supercooling apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105092220B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485869B (en) * | 2016-01-04 | 2018-06-19 | 广东美的暖通设备有限公司 | Electric expansion valve fault detection method and device |
| CN106352473B (en) * | 2016-08-19 | 2019-08-30 | 广东美的暖通设备有限公司 | Multi-line system and its fault detection method that branch valve component is subcooled |
| CN107525211B (en) * | 2017-07-17 | 2020-06-30 | 青岛海尔空调器有限总公司 | Air conditioner and fault detection and processing method of supercooling pipe set of air conditioner |
| JP7000124B2 (en) * | 2017-11-07 | 2022-01-19 | アズビル株式会社 | Valve maintenance support device and method |
| CN110542197B (en) * | 2019-09-16 | 2021-07-20 | 广东美的暖通设备有限公司 | Detection assembly for air conditioner, control method and air conditioner |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001012245A (en) * | 1999-06-30 | 2001-01-16 | Honda Motor Co Ltd | Failure judgement device of electric heat exchanger |
| CN103090504B (en) * | 2011-11-04 | 2015-07-01 | 珠海格力电器股份有限公司 | Air conditioner, and method and device for detecting air conditioner |
| CN103245154B (en) * | 2012-02-09 | 2016-08-31 | 杭州三花研究院有限公司 | A kind of control method of automotive air-conditioning system electric expansion valve |
| CN103424211B (en) * | 2012-05-17 | 2016-04-20 | 珠海格力电器股份有限公司 | The detection method of compressor temperature-sensitive bag and pick-up unit and off-premises station |
| CN102944436B (en) * | 2012-10-31 | 2015-05-27 | 惠州市德赛西威汽车电子有限公司 | Method for detecting abnormality of refrigerating capacity of automobile air conditioner |
| CN103033356B (en) * | 2012-12-28 | 2015-08-19 | 上海佐竹冷热控制技术有限公司 | The Performance Test System of coaxial heat exchanger and method of testing in air conditioning for automobiles |
| CN103104962B (en) * | 2013-02-27 | 2015-06-03 | 四川长虹空调有限公司 | Method for detecting four-way valve of air-conditioner |
-
2014
- 2014-05-07 CN CN201410191546.XA patent/CN105092220B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105092220A (en) | 2015-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105021381B (en) | The fault detection method and device of electric expansion valve in air conditioner | |
| CN105092220B (en) | The fault detection method and device of low temperature valve are crossed in supercooling apparatus | |
| CN105783203B (en) | The method for detecting abnormality of air conditioner and its indoor unit | |
| CN105299841B (en) | The fault detection method of the heat exchange valve body of multiple on-line system and its outdoor heat exchanger | |
| CN104949266B (en) | The secondary refrigerant leakage detection method of air conditioner and air conditioner | |
| KR102317340B1 (en) | Air conditioner and fault diagnosis method thereof | |
| CN105588301B (en) | Signal wire self checking method between multi-line system and its part flow arrangement and indoor unit | |
| CN105299840B (en) | The fault detection method of multi-line system and its by-pass valve body | |
| WO2005059446A2 (en) | Loss of refrigerant charge and expansion valve malfunction detection | |
| CN106196428A (en) | Air-conditioner and anti-freeze control method thereof | |
| JP6061819B2 (en) | Air conditioner | |
| CN106247530A (en) | Many air-conditionings self checking method is dragged in many control frequency conversion one | |
| EP2728285A1 (en) | Device and method for detecting abnormality of cooling cycle for refrigerator | |
| CN105972758B (en) | Defrosting control method, defrosting control device and the air conditioner of air conditioner | |
| CN109237721A (en) | Electric expansion valve fault detection method for air-conditioning | |
| CN109282424A (en) | Air-conditioner control method, air conditioner controlling device | |
| CN107702271A (en) | The fault detect of air-conditioning and its supercooling tube group and processing method | |
| JP2008082654A (en) | Failure diagnostic method for refrigerating device, and refrigerating device | |
| CN110542196B (en) | Detection assembly for air conditioner, control method, control device and air conditioner | |
| CN105299988A (en) | Air-cooled heat pump water cooling and heating machine and high voltage protection preventing method for air-cooled heat pump water cooling and heating machine | |
| CN110848874B (en) | Air conditioner refrigerant leakage detection method and device | |
| CN112097364B (en) | Air conditioner and electronic expansion valve fault detection method thereof | |
| JP3590499B2 (en) | Air conditioner | |
| CN106322652A (en) | Multi-split air conditioner system and failure detection method for main flow path valve component of multi-split air conditioner system | |
| CN105299991B (en) | The fault detection method of multiple on-line system and its antifreeze valve body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |