CN104564641B - The method for diagnosing faults of frequency-changeable compressor, device and system in household electrical appliance - Google Patents

The method for diagnosing faults of frequency-changeable compressor, device and system in household electrical appliance Download PDF

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CN104564641B
CN104564641B CN201410821145.8A CN201410821145A CN104564641B CN 104564641 B CN104564641 B CN 104564641B CN 201410821145 A CN201410821145 A CN 201410821145A CN 104564641 B CN104564641 B CN 104564641B
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frequency
changeable compressor
offset
initiation culture
sampled data
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CN104564641A (en
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朱俊
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GD Midea Air Conditioning Equipment Co Ltd
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Guangdong Midea Refrigeration Equipment Co Ltd
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Abstract

The present invention proposes the method for diagnosing faults of frequency-changeable compressor, device and system in a kind of household electrical appliance.Wherein, this method includes:Obtain the initiation culture function of frequency-changeable compressor;After frequency-changeable compressor startup, the running frequency of frequency-changeable compressor is sampled according to the default sampling period to generate frequency sampled data collection;Calculate the offset between frequency sampled data collection and initiation culture function;And the safe class of frequency-changeable compressor is obtained according to offset.The method for diagnosing faults of frequency-changeable compressor in the household electrical appliance of the embodiment of the present invention, so as to effectively judge potential risk existing for frequency-changeable compressor and failure, frequency-changeable compressor reliability of operation and stability are improved, avoid the hidden danger for triggering security incident.

Description

The method for diagnosing faults of frequency-changeable compressor, device and system in household electrical appliance
Technical field
The present invention relates to a kind of fault diagnosis of frequency-changeable compressor in technical field of refrigeration equipment, more particularly to household electrical appliance Method and apparatus.
Background technology
With the fast development of Refrigeration Technique, refrigeration plant (such as air-conditioning, refrigerator etc.) increasingly frequently occurs in existing Among the life of people, wherein, compressor is most important high power device in refrigeration plant.
At present, the compressor horsepower of frequency conversion refrigeration plant is controlled by frequency, therefore, frequency be compressor most Important parameter, it is related to the performance, stability and security of refrigeration plant.Specifically, compressor is starting, operate, stopped Frequency during machine is adjusted according to certain preset rules, but in actual use, control compressor fortune Capable frequency can produce skew, i.e. frequency can increase or reduce for predeterminated frequency, however, compressor is for a long time in frequency Operation can cause refrigeration plant reliability of operation and stability to reduce in the state of rate offset is excessive, cause refrigeration plant Failure, even it can trigger security incident when serious.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.
Therefore, first purpose of the present invention is in a kind of fault diagnosis side of the frequency-changeable compressor in household electrical appliance are proposed Method.The method for diagnosing faults of frequency-changeable compressor in the household electrical appliance, it can effectively judge potential wind existing for frequency-changeable compressor Danger and failure, frequency-changeable compressor reliability of operation and stability are improved, avoid the hidden danger for triggering security incident.
Trouble-shooter of the second object of the present invention in the frequency-changeable compressor in a kind of household electrical appliance are proposed.
Fault diagnosis system of the third object of the present invention in the frequency-changeable compressor in a kind of household electrical appliance are proposed.
For the above-mentioned purpose, first aspect present invention embodiment proposes a kind of failure of frequency-changeable compressor in household electrical appliance Diagnostic method, wherein, this method includes:Obtain the initiation culture function of frequency-changeable compressor;After frequency-changeable compressor startup, press The running frequency of frequency-changeable compressor is sampled according to the default sampling period to generate frequency sampled data collection;Calculate frequency sampling Offset between data set and initiation culture function;And the safe class of frequency-changeable compressor is obtained according to offset.
The method for diagnosing faults of frequency-changeable compressor in the household electrical appliance of the embodiment of the present invention, is opened by gathering frequency-changeable compressor The frequency of frequency-changeable compressor is acquired during dynamic to generate frequency sampled data collection, and by frequency collection data set and number Contrasted according to the initiation culture function prestored in storehouse, the offset of frequency-changeable compressor frequency is quantified, and with this Offset be according to judging potential risk existing for frequency-changeable compressor and failure, can so as to improve frequency-changeable compressor operation By property and stability, avoid and trigger the hidden danger of security incident second aspect of the present invention embodiment proposes for the above-mentioned purpose The trouble-shooter of frequency-changeable compressor in a kind of household electrical appliance, wherein, the device includes:Acquisition module, for obtaining frequency conversion The initiation culture function of compressor;Sampling module, after starting in frequency-changeable compressor, according to the default sampling period to frequency conversion The running frequency of compressor is sampled to generate frequency sampled data collection;Computing module, for calculating frequency sampled data collection With the offset between initiation culture function;And the safe class of frequency-changeable compressor is obtained according to offset.
The trouble-shooter of frequency-changeable compressor in the household electrical appliance of the embodiment of the present invention, is opened by gathering frequency-changeable compressor The frequency of frequency-changeable compressor is acquired during dynamic to generate frequency sampled data collection, and by frequency collection data set and number Contrasted according to the initiation culture function prestored in storehouse, the offset of frequency-changeable compressor frequency is quantified, and with this Offset be according to judging potential risk existing for frequency-changeable compressor and failure, can so as to improve frequency-changeable compressor operation By property and stability, the hidden danger for triggering security incident is avoided.
For the above-mentioned purpose, third aspect present invention embodiment proposes a kind of failure of frequency-changeable compressor in household electrical appliance Diagnostic system, wherein, the system includes:Air conditioner and intelligent terminal, wherein, intelligent terminal is used to start it in frequency-changeable compressor Afterwards, the running frequency of frequency-changeable compressor is sampled to generate frequency sampled data collection according to the default sampling period, and calculated Offset between frequency sampled data collection and initiation culture function, and safety of frequency-changeable compressor etc. is obtained according to offset Level.
The fault diagnosis system of frequency-changeable compressor in the household electrical appliance of the embodiment of the present invention, is opened by gathering frequency-changeable compressor The frequency of frequency-changeable compressor is acquired during dynamic to generate frequency sampled data collection, and by frequency collection data set and number Contrasted according to the initiation culture function prestored in storehouse, the offset of frequency-changeable compressor frequency is quantified, and with this Offset be according to judging potential risk existing for frequency-changeable compressor and failure, can so as to improve frequency-changeable compressor operation By property and stability, the hidden danger for triggering security incident is avoided.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments Substantially and it is readily appreciated that, wherein:
Fig. 1 be one embodiment of the invention household electrical appliance in frequency-changeable compressor method for diagnosing faults flow chart;
Fig. 2 is schematic diagram of the frequency with starting time relationship when the frequency-changeable compressor of one embodiment of the invention starts;
Fig. 3 be one embodiment of the invention household electrical appliance in frequency-changeable compressor trouble-shooter structural representation Figure;And
Fig. 4 be one embodiment of the invention household electrical appliance in frequency-changeable compressor fault diagnosis system structural representation Figure.
Embodiment
Embodiments of the invention are described below in detail, the example of embodiment is shown in the drawings, wherein identical from beginning to end Or similar label represents same or similar element or the element with same or like function.Retouched below with reference to accompanying drawing The embodiment stated is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.It is on the contrary, of the invention Embodiment include all changes, modification and the equivalent fallen into the range of the spirit and intension of attached claims.
In the description of the invention, it is to be understood that term " first ", " second " etc. are only used for describing purpose, without It is understood that to indicate or implying relative importance.In the description of the invention, it is necessary to which explanation, is provided unless otherwise clear and definite And restriction, term " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, Or it is integrally connected;Can be mechanical connection or electrical connection;Can be joined directly together, intermediary can also be passed through It is indirectly connected.For the ordinary skill in the art, the tool of above-mentioned term in the present invention can be understood with concrete condition Body implication.In addition, in the description of the invention, unless otherwise indicated, " multiple " are meant that two or more.
Any process or method described otherwise above description in flow chart or herein is construed as, and represents to include Module, fragment or the portion of the code of the executable instruction of one or more the step of being used to realize specific logical function or process Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention Embodiment person of ordinary skill in the field understood.
Below with reference to the accompanying drawings describe the method for diagnosing faults of frequency-changeable compressor in household electrical appliance according to embodiments of the present invention, Device and system.
Fig. 1 be one embodiment of the invention household electrical appliance in frequency-changeable compressor method for diagnosing faults flow chart, Fig. 2 It is schematic diagram of the frequency with starting time relationship when the frequency-changeable compressor of one embodiment of the invention starts.
As shown in figure 1, the method for diagnosing faults of frequency-changeable compressor includes in the household electrical appliance:
S101:Obtain the initiation culture function of frequency-changeable compressor.
Specifically, in order to avoid being caused damage to frequency-changeable compressor, frequency-changeable compressor in start-up course can not directly with The frequency operation of setting, but it is stepped up frequency of the frequency until reaching setting according to preset rules.
For example, as shown in Fig. 2 transverse axis represents the startup time t of frequency-changeable compressor, the longitudinal axis represents the frequency f of compressor.It is false If the default initiation culture of frequency-changeable compressor is fset, fset> f2, frequency-changeable compressor upon actuation, frequency f first since 0 with kup1Speed rise, when frequency f sizes reach f1When, stop rising, frequency-changeable compressor keep frequency f1Run a period of time t1 Afterwards, frequency f is again with kup2Speed rise.When frequency f sizes reach f2When, stop rising, frequency-changeable compressor keep frequency again f2Run a period of time t2Afterwards, frequency f is again with kup3Speed to rise to default initiation culture be fset
Therefore, in the start-up course of frequency-changeable compressor, frequency can use function f=υ (t) tables with starting the relation of time Show.Intelligent terminal obtains the initiation culture function f=υ (t) of frequency-changeable compressor, and the initiation culture function f=υ (t) are stored In the database of intelligent terminal.
S102, after frequency-changeable compressor startup, the running frequency of frequency-changeable compressor is carried out according to the default sampling period Sample to generate frequency sampled data collection.
Specifically, after frequency-changeable compressor starts, the frequency read module in household electrical appliance compresses to frequency conversion in real time The frequency of machine is sampled, and is sent sampled result to intelligent terminal by communication module.Wherein, intelligent terminal also has logical Believe module, the communication mode between household electrical appliance and the communication module of intelligent terminal may include but be not limited to Wifi, bluetooth, red Outside, one kind in ZigBee, GPRS.
Furthermore, frequency read module is when the frequency to frequency-changeable compressor samples, sampling period T, its In, sampling period T is configurable parameter, that is to say, that sampling period T can be given tacit consent in frequency read module, also may be used To be configured manually as needed.When frequency-changeable compressor has run time trunAfterwards, the frequency of frequency-changeable compressor reaches Default initiation culture fset, therefore, t at runtimerunInterior, the frequency sampled data collection of frequency read module sampling is fsample={ f1, f2..., fn, wherein,
In one embodiment of the invention, according to the default sampling period to frequency-changeable compressor after frequency-changeable compressor starts Running frequency sampled, preset until the difference of frequency-changeable compressor actual motion frequency and default initiation culture is less than first Threshold value.Specifically, during frequency read module samples to the frequency of frequency-changeable compressor, in each sampling period The currently practical running frequency f and default initiation culture f of frequency-changeable compressor are judged after TsetDifference whether to be less than first default Value a, wherein, the first preset value a is configurable parameter, that is to say, that the first preset value a can be write from memory in frequency read module It is recognizing or as needed be manually configured.If the currently practical running frequency f of frequency-changeable compressor with it is default Initiation culture fsetDifference be less than the first preset value, then frequency read module terminates to sample the frequency of frequency-changeable compressor.
S103, calculate the offset between frequency sampled data collection and initiation culture function.
In one embodiment of the invention, by below equation calculate frequency sampled data collection and initiation culture function it Between offset:
Wherein, n is to preset the quantity of the running frequency sampled in the sampling period, initiation culture function f=υ (t), i For the positive integer more than 0 and less than n, fiIt is expressed as the frequency sampled data collection of frequency-changeable compressor.Specifically, intelligent terminal leads to Cross to frequency sampled data collection fsampleCompared with the initiation culture function f=υ (t) in the database of intelligent terminal, so as to Calculate frequency sampled data collection fsampleOffset delta between initiation culture function f=υ (t).Wherein, δ is an expression Difference amount between the running frequency of preset frequency and reality, δ value is bigger, illustrates that the offset of actual motion frequency is got over Greatly, the risk that frequency-changeable compressor is run under the frequency is also bigger.
S104, the safe class of frequency-changeable compressor is obtained according to offset.
In one embodiment of the invention, if offset is less than the second predetermined threshold value, it is judged as safe class;Such as Fruit offset is more than or equal to the second predetermined threshold value and is less than the 3rd predetermined threshold value, then is judged as echelons of maintenance;And if partially Shifting amount is more than or equal to the 3rd predetermined threshold value, then is judged as fault level.Wherein, the scope of the second predetermined threshold value is 1-2, the 3rd The scope of threshold value is 3-4.Specifically, the second predetermined threshold value ε and the 3rd predetermined threshold value ξ is configurable parameter, that is, Say, the second predetermined threshold value ε and the 3rd predetermined threshold value ξ can be giving tacit consent in intelligent terminal or as needed enter manually What row was set.For example, in the range of the second predetermined threshold value ε being arranged on into 1-2, the 3rd predetermined threshold value ξ is arranged on 3-4's In the range of.
Furthermore, as offset delta < the second predetermined threshold value ε, judge the running status of frequency-changeable compressor for safety State, without being prompted;As the second predetermined threshold value ε≤offset delta the 3rd predetermined threshold value ξ of <, frequency-changeable compressor is judged Risk be present, it is necessary to prompt to maintain frequency-changeable compressor in running status;As offset delta >=the 3rd predetermined threshold value ξ, judge Failure be present, it is necessary to prompt immediately to repair frequency-changeable compressor in the running status of frequency-changeable compressor.
It should be appreciated that after the running status of frequency-changeable compressor is judged, can be by the operation of frequency-changeable compressor Status display prompts user on a display screen.If in addition, the running status of frequency-changeable compressor exist risk either failure, It can also audibly prompt user that frequency-changeable compressor is maintained or repaired in time by buzzer etc. equipment.
The method for diagnosing faults of frequency-changeable compressor in the household electrical appliance of the embodiment of the present invention, is opened by gathering frequency-changeable compressor The frequency of frequency-changeable compressor is acquired during dynamic to generate frequency sampled data collection, and by frequency collection data set and number Contrasted according to the initiation culture function prestored in storehouse, the offset of frequency-changeable compressor frequency is quantified, and with this Offset be according to judging potential risk existing for frequency-changeable compressor and failure, can so as to improve frequency-changeable compressor operation By property and stability, the hidden danger for triggering security incident is avoided.
Below for example illustratively in the household electrical appliance of the embodiment of the present invention frequency-changeable compressor method for diagnosing faults.
As shown in table 1, it is assumed that parameters are as follows when frequency-changeable compressor starts:
kup1 kup2 kup3 t1 t2 f1 f2
2Hz/s 0.5Hz/s 0.2Hz/s 200s 300s 45Hz 68Hz
Table 1 is parameters when frequency-changeable compressor starts
And the second predetermined threshold value ε of the safe class for judging frequency-changeable compressor is equal to 1.5, the 3rd predetermined threshold value ξ etc. In 3.5.Thus, frequency-changeable compressor frequency and relation of time in start-up course can use function f=υ (t) to represent, wherein, Initiation culture function f can be expressed as:
Assuming that the default initiation culture f of frequency-changeable compressorset68Hz is set to, sampling period T is 5s.Between at the beginning of sampling Enabling signal is received for compressor to start, the dwell time of sampling is the actual motion frequency of the frequency-changeable compressor of sampling gained And the difference of default initiation culture is less than the first predetermined threshold value a, wherein, the first predetermined threshold value a is 0.5, i.e. the stop condition of sampling For:
|fT-fset| < a
The frequency of frequency-changeable compressor is started that after sampling frequency sampled data collection as shown in table 2 can be obtained:
Table 2 is the frequency sampled data collection of frequency-changeable compressor
As shown in Table 2, as sampling time t=260s, | fT-fset|=| 67.8Hz-68Hz |=0.2Hz < 0.5Hz, That is, the condition for stopping sampling being met as t=260s.
Above-mentioned initiation culture function f function expression is brought into the calculation formula of offsetOffset delta=1.274 can be obtained, so as to judge that offset delta < second presets threshold Value ε, therefore, the running status of frequency-changeable compressor is safe condition.
In order to implement above-described embodiment, the present invention also proposes a kind of fault diagnosis dress of frequency-changeable compressor in household electrical appliance Put.
Fig. 3 be one embodiment of the invention household electrical appliance in frequency-changeable compressor trouble-shooter structural representation Figure.
As shown in figure 3, the trouble-shooter of frequency-changeable compressor includes in household electrical appliance:Acquisition module 210, sampling module 220th, computing module 230 and judge module 240.
Specifically, acquisition module 210 is used for the initiation culture function for obtaining frequency-changeable compressor.Specifically, in order to avoid right Frequency-changeable compressor is caused damage, and frequency-changeable compressor directly can not be run in start-up course with the frequency of setting, but according to pre- If rule is stepped up frequency of the frequency until reaching setting.
For example, as shown in Fig. 2 transverse axis represents the startup time t of frequency-changeable compressor, the longitudinal axis represents the frequency f of compressor.It is false If the default initiation culture of frequency-changeable compressor is fset, fset> f2, frequency-changeable compressor upon actuation, frequency f first since 0 with kup1Speed rise, when frequency f sizes reach f1When, stop rising, frequency-changeable compressor keep frequency f1Run a period of time t1 Afterwards, frequency f is again with kup2Speed rise.When frequency f sizes reach f2When, stop rising, frequency-changeable compressor keep frequency again f2Run a period of time t2Afterwards, frequency f is again with kup3Speed to rise to default initiation culture be fset
Therefore, in the start-up course of frequency-changeable compressor, frequency can use function f=υ (t) tables with starting the relation of time Show.Acquisition module 210 obtains the initiation culture function f=υ (t) of frequency-changeable compressor, and the initiation culture function f=υ (t) are deposited Storage is in the database of intelligent terminal.
Sampling module 220 is used for after frequency-changeable compressor startup, the fortune according to the default sampling period to frequency-changeable compressor Line frequency is sampled to generate frequency sampled data collection.Specifically, after frequency-changeable compressor starts, sampling module 220 The frequency of frequency-changeable compressor is sampled in real time by the frequency read module in household electrical appliance.Furthermore, mould is sampled Block 220 is when the frequency to frequency-changeable compressor samples, sampling period T, wherein, sampling period T is configurable parameter, That is, sampling period T can be giving tacit consent in sampling module 220 or as needed be configured manually.When Frequency-changeable compressor has run time trunAfterwards, the frequency of frequency-changeable compressor has reached default initiation culture fset, therefore, running Time trunInterior, the frequency sampled data that sampling module 220 samples integrates as fsample={ f1, f2..., fn, wherein,
In one embodiment of the invention, sampling module 220 is additionally operable to adopt according to default after frequency-changeable compressor starts The sample cycle samples to the running frequency of frequency-changeable compressor, until frequency-changeable compressor actual motion frequency starts frequency with default The difference of rate is less than the first predetermined threshold value.Specifically, the process sampled in sampling module 220 to the frequency of frequency-changeable compressor In, the currently practical running frequency f and default initiation culture f of frequency-changeable compressor are judged after each sampling period TsetIt Whether difference is less than the first preset value a, wherein, the first preset value a is the parameter that can configure, that is to say, that the first preset value a can be with It is giving tacit consent in sampling module 220 or as needed is configured manually.If frequency-changeable compressor is currently practical Running frequency f and default initiation culture fsetDifference be less than the first preset value, then sampling module 220 terminates to frequency-changeable compressor Frequency sampled.
Computing module 230 is used to calculate the offset between frequency sampled data collection and initiation culture function.
In one embodiment of the invention, computing module 230 calculates frequency sampled data collection by below equation and opened Offset between dynamic frequency function:
Wherein, n is to preset the quantity of the running frequency sampled in the sampling period, initiation culture function f=υ (t), i For the positive integer more than 0 and less than n, fiIt is expressed as the frequency sampled data collection of frequency-changeable compressor.Specifically, computing module 230 by frequency sampled data collection fsampleCompared with the initiation culture function f=υ (t) in the database of intelligent terminal Compared with so as to calculate frequency sampled data collection fsampleOffset delta between initiation culture function f=υ (t).Wherein, δ is one Difference amount between the individual running frequency for representing preset frequency and reality, δ value is bigger, illustrates the offset of actual motion frequency Bigger, the risk that frequency-changeable compressor is run under the frequency is also bigger.
Judge module 240 is used for the safe class that frequency-changeable compressor is obtained according to offset.
In one embodiment of the invention, if offset is less than the second predetermined threshold value, judge module 240 is then judged as Safe class;If offset is more than or equal to the second predetermined threshold value and is less than the 3rd predetermined threshold value, judge module 240 then judges For echelons of maintenance;And if offset is more than or equal to the 3rd predetermined threshold value, judge module 240 is then judged as fault level. Wherein, the scope of the second predetermined threshold value is 1-2, and the scope of the 3rd threshold value is 3-4.Specifically, the second predetermined threshold value ε and the 3rd Predetermined threshold value ξ is configurable parameter, that is to say, that the second predetermined threshold value ε and the 3rd predetermined threshold value ξ can be judge module It is giving tacit consent in 240 or as needed be manually configured.For example, the second predetermined threshold value ε can be arranged on 1-2 In the range of, the 3rd predetermined threshold value ξ is arranged in the range of 3-4.
Furthermore, as offset delta < the second predetermined threshold value ε, judge module 240 judges the operation of frequency-changeable compressor State is safe condition, without being prompted;As the second predetermined threshold value ε≤offset delta the 3rd predetermined threshold value ξ of <, mould is judged Block 240 judges that the running status of frequency-changeable compressor has risk, it is necessary to prompt to maintain frequency-changeable compressor;Work as offset delta During the >=the three predetermined threshold value ξ, judge module 240 judge the running status of frequency-changeable compressor failure be present, it is necessary to prompt it is right immediately Frequency-changeable compressor is repaired.
It should be appreciated that after judge module 240 judges the running status of frequency-changeable compressor, can be by frequency conversion pressure The running status of contracting machine is shown prompts user on a display screen.In addition, if it is determined that module 240 judges the fortune of frequency-changeable compressor There is risk either failure in row state, then can also audibly prompt user in time to becoming by equipment such as buzzers Frequency compressor is maintained or repaired.
The trouble-shooter of frequency-changeable compressor in the household electrical appliance of the embodiment of the present invention, is opened by gathering frequency-changeable compressor The frequency of frequency-changeable compressor is acquired during dynamic to generate frequency sampled data collection, and by frequency collection data set and number Contrasted according to the initiation culture function prestored in storehouse, the offset of frequency-changeable compressor frequency is quantified, and with this Offset be according to judging potential risk existing for frequency-changeable compressor and failure, can so as to improve frequency-changeable compressor operation By property and stability, the hidden danger for triggering security incident is avoided.
In order to realize above-described embodiment, the invention also provides a kind of fault diagnosis system of frequency-changeable compressor in household electrical appliance System.
Fig. 4 be one embodiment of the invention household electrical appliance in frequency-changeable compressor fault diagnosis system structural representation Figure.
As shown in figure 4, the fault diagnosis system of frequency-changeable compressor includes in household electrical appliance:Air conditioner 100 and intelligent terminal 200.Wherein, intelligent terminal 200 is used for after frequency-changeable compressor startup, the fortune according to the default sampling period to frequency-changeable compressor Line frequency is sampled to generate frequency sampled data collection, and is calculated inclined between frequency sampled data collection and initiation culture function Shifting amount, and the safe class according to offset acquisition frequency-changeable compressor.
It should be noted that in the household electrical appliance of the embodiment of the present invention fault diagnosis system of frequency-changeable compressor specific reality The specific implementation class of the method for diagnosing faults part of frequency-changeable compressor in the household electrical appliance of existing mode and the embodiment of the present invention Seemingly, the description of method part is specifically referred to, in order to reduce redundancy, is not repeated herein.
The fault diagnosis system of frequency-changeable compressor in the household electrical appliance of the embodiment of the present invention, is opened by gathering frequency-changeable compressor The frequency of frequency-changeable compressor is acquired during dynamic to generate frequency sampled data collection, and by frequency collection data set and number Contrasted according to the initiation culture function prestored in storehouse, the offset of frequency-changeable compressor frequency is quantified, and with this Offset be according to judging potential risk existing for frequency-changeable compressor and failure, can so as to improve frequency-changeable compressor operation By property and stability, the hidden danger for triggering security incident is avoided.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware Any one of row technology or their combination are realized:With the logic gates for realizing logic function to data-signal Discrete logic, have suitable combinational logic gate circuit application specific integrated circuit, programmable gate array (PGA), scene Programmable gate array (FPGA) etc..
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 Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that:Not In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this The scope of invention is limited by claim and its equivalent.

Claims (11)

1. the method for diagnosing faults of frequency-changeable compressor in a kind of household electrical appliance, it is characterised in that comprise the following steps:
Obtain the initiation culture function of the frequency-changeable compressor, it is straight that the frequency-changeable compressor according to preset rules is stepped up frequency The frequency of setting is reached, the initiation culture function is stored in database;
After frequency-changeable compressor startup, the running frequency of frequency-changeable compressor is sampled according to the default sampling period to generate Frequency sampled data collection;
The offset between the frequency sampled data collection and the initiation culture function is calculated, wherein, by the frequency Sampled data set is compared with the initiation culture function in the database, so as to calculate the frequency sampled data Offset between collection and the initiation culture function;And
The safe class of the frequency-changeable compressor is obtained according to the offset.
2. the method for diagnosing faults of frequency-changeable compressor in household electrical appliance as claimed in claim 1, it is characterised in that in frequency conversion pressure Contracting machine is sampled to generate frequency sampled data after starting according to the default sampling period to the running frequency of frequency-changeable compressor Collection specifically includes:
Frequency-changeable compressor samples after starting according to the default sampling period to the running frequency of frequency-changeable compressor, until described Frequency-changeable compressor actual motion frequency and the difference of default initiation culture are less than the first predetermined threshold value.
3. the method for diagnosing faults of frequency-changeable compressor in household electrical appliance as claimed in claim 1, it is characterised in that by following Formula calculates the offset between the frequency sampled data collection and the initiation culture function:
<mrow> <mi>&amp;delta;</mi> <mo>=</mo> <msubsup> <mi>&amp;Sigma;</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </msubsup> <mo>|</mo> <msub> <mi>f</mi> <mi>i</mi> </msub> <mo>-</mo> <mi>v</mi> <mrow> <mo>(</mo> <mi>i</mi> <mi>T</mi> <mo>)</mo> </mrow> <mo>|</mo> <mo>/</mo> <mi>n</mi> <mo>,</mo> </mrow>
Wherein, n is the quantity of running frequency sampled within the default sampling period, and T is the sampling period, fiFor frequency conversion pressure The frequency sampled data collection of contracting machine, v (iT) are initiation culture function, and i is the positive integer more than 0 and less than n.
4. the method for diagnosing faults of frequency-changeable compressor in household electrical appliance as claimed in claim 1, it is characterised in that the basis The safe class that the offset obtains the frequency-changeable compressor specifically includes:
If the offset is less than the second predetermined threshold value, it is judged as safe class;
If the offset is more than or equal to second predetermined threshold value and is less than the 3rd predetermined threshold value, it is judged as maintenance etc. Level;And
If the offset is more than or equal to the 3rd predetermined threshold value, it is judged as fault level.
5. the method for diagnosing faults of frequency-changeable compressor in household electrical appliance as claimed in claim 4, it is characterised in that described second The scope of predetermined threshold value is 1-2, and the scope of the 3rd predetermined threshold value is 3-4.
A kind of 6. trouble-shooter of frequency-changeable compressor in household electrical appliance, it is characterised in that including:
Acquisition module, for obtaining the initiation culture function of the frequency-changeable compressor, the frequency-changeable compressor is according to preset rules Frequency of the frequency until reaching setting is stepped up, the initiation culture function is stored in database;
Sampling module, after starting in frequency-changeable compressor, the running frequency according to the default sampling period to frequency-changeable compressor Sampled to generate frequency sampled data collection;
Computing module, for calculating the offset between the frequency sampled data collection and the initiation culture function, wherein, lead to Cross to the frequency sampled data collection compared with the initiation culture function in the database, it is described so as to calculate Offset between frequency sampled data collection and the initiation culture function;And
Judge module, for obtaining the safe class of the frequency-changeable compressor according to the offset.
7. the trouble-shooter of frequency-changeable compressor in household electrical appliance as claimed in claim 6, it is characterised in that the sampling Module is additionally operable to:
Frequency-changeable compressor samples after starting according to the default sampling period to the running frequency of frequency-changeable compressor, until described Frequency-changeable compressor actual motion frequency and the difference of default initiation culture are less than the first predetermined threshold value.
8. the trouble-shooter of frequency-changeable compressor in household electrical appliance as claimed in claim 6, it is characterised in that the calculating Module calculates the offset between the frequency sampled data collection and the initiation culture function by below equation:
<mrow> <mi>&amp;delta;</mi> <mo>=</mo> <msubsup> <mi>&amp;Sigma;</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </msubsup> <mo>|</mo> <msub> <mi>f</mi> <mi>i</mi> </msub> <mo>-</mo> <mi>v</mi> <mrow> <mo>(</mo> <mi>i</mi> <mi>T</mi> <mo>)</mo> </mrow> <mo>|</mo> <mo>/</mo> <mi>n</mi> <mo>,</mo> </mrow>
Wherein, n is the quantity of running frequency sampled within the default sampling period, and T is the sampling period, fiFor frequency conversion pressure The frequency sampled data collection of contracting machine, v (iT) are initiation culture function, and i is the positive integer more than 0 and less than n.
9. the trouble-shooter of frequency-changeable compressor in household electrical appliance as claimed in claim 6, it is characterised in that the judgement Module is specifically used for:
When the offset is less than the second predetermined threshold value, it is judged as safe class;
When the offset is more than or equal to second predetermined threshold value and is less than three predetermined threshold values, it is judged as maintenance etc. Level;And
When the offset is more than or equal to three predetermined threshold value, it is judged as fault level.
10. the trouble-shooter of frequency-changeable compressor in household electrical appliance as claimed in claim 9, it is characterised in that described The scope of two predetermined threshold values is 1-2, and the scope of the 3rd predetermined threshold value is 3-4.
A kind of 11. fault diagnosis system of frequency-changeable compressor in household electrical appliance, it is characterised in that including:Air conditioner and intelligence are eventually End, wherein,
The intelligent terminal is used for after frequency-changeable compressor startup, according to operation frequency of the default sampling period to frequency-changeable compressor Rate is sampled to generate frequency sampled data collection, and is calculated between the frequency sampled data collection and the initiation culture function Offset, and obtain according to the offset safe class of the frequency-changeable compressor, wherein, the frequency-changeable compressor is pressed Frequency of the frequency until reaching setting is stepped up according to preset rules, the initiation culture function is stored in database, passed through To the frequency sampled data collection compared with the initiation culture function in the database, so as to calculate the frequency Offset between rate sampled data set and the initiation culture function.
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