CN106152646B - The method for controlling air conditioner electronic expansion valve - Google Patents

The method for controlling air conditioner electronic expansion valve Download PDF

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Publication number
CN106152646B
CN106152646B CN201610515018.4A CN201610515018A CN106152646B CN 106152646 B CN106152646 B CN 106152646B CN 201610515018 A CN201610515018 A CN 201610515018A CN 106152646 B CN106152646 B CN 106152646B
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setting
coefficient
integral coefficient
temperature
less
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CN106152646A (en
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许文明
付裕
徐贝贝
刘聚科
张明杰
王飞
李波
任志强
袁俊军
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2513Expansion valves
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a kind of methods for controlling air conditioner electronic expansion valve, comprising: obtains compressor real time execution frequency, real time exhaust gas temperature and real-time outdoor environment temperature, real time execution frequency is made comparisons with the first setpoint frequency;If real time execution frequency is not less than the first setpoint frequency, according to the integral coefficient of the first setting Rule pid algorithm;If real time execution frequency is less than the first setpoint frequency, when according to freezing or heat different operating conditions, selection sets the integral coefficient of Rule pid algorithm according to the size relation and second of real-time outdoor environment temperature and the first outer circumstance temperature of setting, or the size relation of outer circumstance temperature and the integral coefficient of third setting Rule pid algorithm are set according to real-time outdoor environment temperature and first;Using real time exhaust gas temperature and the difference for setting target exhaust temperature as deviation, PID control is carried out based on aperture of the deviation to electric expansion valve.Using the present invention, accurate, the stable regulation to electronic expansion valve opening are realized.

Description

The method for controlling air conditioner electronic expansion valve
Technical field
The invention belongs to air-conditioning technique fields, are to relate to more specifically specifically, being to be related to the adjusting of air-conditioning And the method for control air conditioner electronic expansion valve.
Background technique
Electric expansion valve is widely used in the air conditioner coolant circulatory system as a kind of novel control element.By right The aperture of electric expansion valve is adjusted, and the refrigerant circulation in regulating system can satisfy operation of air conditioner performance requirement.Cause How this, control effectively to electric expansion valve, is the key that measure air-conditioning system Energy Efficiency Ratio.
In the prior art, the aperture of electric expansion valve can be controlled using pid algorithm.It specifically, is to press The actual exhaust air temperature of contracting machine and the difference of target exhaust temperature carry out PID arithmetic based on the deviation, realize to electricity as deviation The adjusting of sub- expansion valve opening controls, and the control of valve can be made rapider, improves to the followability of external world's variation.But it is existing Have during PID tune valve controls, pid parameter value immobilizes, so that the adjusting of valve opening does not adapt to different types of air-conditioning and not With the variation of operating condition, valve opening adjusts inaccurate, it is difficult to reach the Energy Efficiency Ratio of the ideal air conditioner coolant circulatory system.
Summary of the invention
The object of the present invention is to provide a kind of methods for controlling air conditioner electronic expansion valve, reach to electronic expansion valve opening Accurately, the technical purpose of the Energy Efficiency Ratio of stable regulation and the raising air conditioner coolant circulatory system.
For achieving the above object, the present invention, which adopts the following technical solutions, is achieved:
A method of control air conditioner electronic expansion valve, which comprises
After compressor start operation, real time execution frequency, real time exhaust gas temperature and the real-time outdoor environment of compressor are obtained Temperature makes comparisons the real time execution frequency with the first setpoint frequency;
If the real time execution frequency is not less than first setpoint frequency, according to the first setting Rule pid algorithm Integral coefficient;If the real time execution frequency is less than first setpoint frequency, following treatment processes is executed:
Under refrigerating operaton operating condition, the real-time outdoor environment temperature is made comparisons with the first outer circumstance temperature of setting, if the reality When outdoor environment temperature be less than the outer circumstance temperature of first setting, set basic integral coefficient and second according to first and set rule and obtain Take the integral coefficient of pid algorithm;If the real-time outdoor environment temperature is set not less than the outer circumstance temperature of first setting according to second The integral of fixed basis integral coefficient and the second setting Rule pid algorithm;According to the first setting Rule The integral coefficient of pid algorithm is not less than the integral coefficient of the pid algorithm according to the second setting Rule, and described first sets Fixed basis integral coefficient is greater than described second and sets basic integral coefficient;
Under heating operation operating condition, the real-time outdoor environment temperature is made comparisons with the second outer circumstance temperature of setting, if the reality When outdoor environment temperature be greater than the outer circumstance temperature of second setting, basic integral coefficient is set according to third and third sets rule and obtains Take the integral coefficient of pid algorithm;If the real-time outdoor environment temperature is set no more than the outer circumstance temperature of second setting according to the 4th The integral coefficient of fixed basis integral coefficient and third setting Rule pid algorithm;It is obtained according to the first setting rule The integral coefficient of the pid algorithm taken is not less than the integral coefficient that the pid algorithm of Rule is set according to the third, and described the Three, which set basic integral coefficient, is greater than the basic integral coefficient of the 4th setting;
Then, with the real time exhaust gas temperature and setting segmented objects delivery temperature or final goal delivery temperature is set Difference carries out PID control as deviation, based on aperture of the deviation to electric expansion valve;The segmented objects delivery temperature is One or more, each segmented objects delivery temperature are respectively less than the setting final goal delivery temperature;The PID control The integral coefficient of middle pid algorithm is to set rule according to the first setting rule or the second setting rule or the third The integral coefficient of acquisition.
Compared with prior art, the advantages and positive effects of the present invention are: using method of the invention to electric expansion valve When carrying out PID adjusting control, in the compressor low-frequency operation stage, select lesser integral coefficient as the integration system of pid algorithm Number, so that adjust regulated value when valve smaller during low-frequency operation, the fluctuation that the fluctuation and valve opening for reducing delivery temperature are adjusted; And in the compressor non-low-frequency operation stage, select biggish integral coefficient as the integral coefficient of pid algorithm, so that non-low frequency is transported Regulated value is larger during row, adjusts valve speed fast.To which in entire compressor operational process, electronic expansion valve opening is adjusted Accurately, stablize, be conducive to the promotion of air conditioner coolant circulatory system Energy Efficiency Ratio.Also, in the compressor low-frequency operation stage, according to room The difference of external environment temperature uses different integral coefficients, can reduce caused compressor air-discharging wave under outer circumstance temperature mal-condition The fluctuation that dynamic and valve opening is adjusted.Moreover, because having comprehensively considered compressor self-operating parameter and external environment operating condition, increase This tune valve method is to the general applicability under the air conditioner of different type of machines, different operating conditions.In addition, being less than most by setting The segmented objects delivery temperature of whole target exhaust temperature, segmentation realize that delivery temperature is stabilized to final goal delivery temperature, can Reduce the hyperharmonic oscillation that PID is adjusted, shortens the time for being stabilized to final goal delivery temperature.
After a specific embodiment of the invention is read in conjunction with the figure, the other features and advantages of the invention will become more clear Chu.
Detailed description of the invention
Fig. 1 is the flow chart of method one embodiment of present invention control air conditioner electronic expansion valve.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to drawings and examples, Invention is further described in detail.
Referring to Figure 1, which show the flow chart of method one embodiment of present invention control air conditioner electronic expansion valve, It specifically, is the flow chart of one embodiment that the electronic expansion valve opening in the air conditioner coolant circulatory system is adjusted.
As shown in Figure 1, the method that the embodiment realizes electronic expansion valve controls includes the following steps:
Step 11: after compressor start operation, obtaining real time execution frequency, real time exhaust gas temperature and the real-time room of compressor External environment temperature makes comparisons real time execution frequency with the first setpoint frequency.
In the step, the real time execution frequency of compressor refer to compressor start after, acquired according to setting sample frequency Compressor real time execution frequency.Since the running frequency of compressor is controlled by the controller on air-conditioning computer plate, Therefore, controller can easily obtain real time execution frequency when compressor is run.Real time exhaust gas temperature refers to that compressor opens Dynamic rear, according to setting sample frequency compressor collected real time exhaust gas temperature, can be by being arranged in exhaust outlet of compressor Temperature sensor obtains real time exhaust gas temperature by controller to detect.Real-time outdoor environment temperature is sampled according to setting The temperature of outdoor environment locating for frequency compressor collected can be examined by the temperature sensor being arranged on outdoor unit It surveys, and is obtained by air-conditioner controller.
After getting real time execution frequency, it is made comparisons with the first setpoint frequency, compares the size of the two.Wherein, First setpoint frequency is the frequency values for presetting and storing in controller of air conditioner, and can be modified by authorization, It is a threshold frequency for reflecting compressor low-frequency operation Yu non-low-frequency operation.Preferably, the first setpoint frequency is 30- 40Hz, and change with the difference of Air conditioner refrigerating capacity and refrigeration or heating condition.In general, air conditioner refrigerating amount is bigger, first Setpoint frequency is smaller, and vice versa.
Step 12: judging whether real time execution frequency is not less than the first setpoint frequency.If so, executing step 13;If it has not, Execute step 14.
Step 13: if step 12 determines that real time execution frequency is not less than the first setpoint frequency, determining the non-low frequency of compressor Operation, then according to the integral coefficient of the first setting Rule pid algorithm.Then, step 15 is executed.
Step 14: if step 12 determines that real time execution frequency less than the first setpoint frequency, determines compressor low-frequency operation. If operation of air conditioner cooling condition, advised according to the size relation and the second setting of real-time outdoor environment temperature and the first outer circumstance temperature of setting Then obtain the integral coefficient of pid algorithm;If operation of air conditioner heating condition, according to real-time outdoor environment temperature and the first setting outer ring The integral coefficient of size relation and third the setting Rule pid algorithm of temperature.Then, step 15 is executed.
Specifically, if operation of air conditioner cooling condition under compressor low-frequency operation, by real-time outdoor environment temperature and The one outer circumstance temperature of setting is made comparisons, if outdoor environment temperature is less than the first outer circumstance temperature of setting in real time, according to the first setting basis integral The integral coefficient of coefficient and the second setting Rule pid algorithm;If real-time outdoor environment temperature is not less than the first setting outer ring Temperature, the integral for setting basic integral coefficient and the second setting Rule pid algorithm according to second.Wherein, the first setting outer ring Temperature is the outdoor environment temperature value for presetting and storing, and can be modified by authorization, is under reflection cooling condition Outdoor environment temperature is a threshold temperature value of high temperature or non high temperature, for example, first sets outer circumstance temperature as 38 DEG C.First setting Basic integral coefficient, second set basic integral coefficient and the second setting rule be also it is known, be stored in advance in air-conditioning control In device processed, also it can be modified by authorization.
Moreover, according to the integral coefficient of the pid algorithm of the first setting Rule not less than root in step 14 in step 13 According to the integral coefficient of the pid algorithm of the second setting Rule, and first sets basic integral coefficient greater than the second setting basis Integral coefficient.That is, regardless of whether real-time outdoor environment temperature is less than the first outer circumstance temperature of setting, in compressor high frequency operating status Under, according to first setting Rule pid algorithm integral coefficient be not less than under compressor low-frequency operation state, basis The integral coefficient of the pid algorithm of second setting Rule.And under compressor low-frequency operation state, if outdoor environment temperature Less than the first outer circumstance temperature of setting, show that outer work condition is non high temperature, in the case, for calculating the integral coefficient of pid algorithm First set basic integral coefficient be greater than outdoor environment not less than under the high temperature outer work condition of the first outer circumstance temperature of setting for counting It calculates the second of the integral coefficient of pid algorithm and sets basic integral coefficient.
And if operation of air conditioner heating condition under compressor low-frequency operation, real-time outdoor environment temperature and the second setting is outer Circumstance temperature is made comparisons, if outdoor environment temperature is greater than the second outer circumstance temperature of setting in real time, according to third setting basis integral coefficient and the The integral coefficient of three setting Rule pid algorithms;If outdoor environment temperature is no more than the second outer circumstance temperature of setting in real time, according to the Four set the integral coefficient of basic integral coefficient and third setting Rule pid algorithm.Wherein, the second outer circumstance temperature of setting is pre- The outdoor environment temperature value for first setting and storing, can be modified by authorization, be outdoor ring under reflection heating condition Border temperature is a threshold temperature value of low temperature or non-cryogenic, for example, second sets outer circumstance temperature as 10 DEG C.Second setting rule is same On, and third set basic integral coefficient and the 4th set basic integral coefficient be also it is known, be stored in advance in air-conditioning control In device processed, also it can be modified by authorization.
Moreover, according to the integral coefficient of the pid algorithm of the first setting Rule not less than root in step 14 in step 13 According to the integral coefficient of the pid algorithm of third setting Rule, and third sets basic integral coefficient and is greater than the 4th setting basis Integral coefficient.That is, regardless of whether real-time outdoor environment temperature is greater than the outer circumstance temperature of the second setting, in compressor high frequency operating status Under, according to first setting Rule pid algorithm integral coefficient be not less than under compressor low-frequency operation state, basis Third sets the integral coefficient of the pid algorithm of Rule.And under compressor low-frequency operation state, if outdoor environment temperature Greater than the second outer circumstance temperature of setting, show that outer work condition is non-cryogenic, in the case, for calculating the integral coefficient of pid algorithm Third set basic integral coefficient be greater than outdoor environment less than under the low outside operating condition of the second outer circumstance temperature of setting for calculating The 4th of the integral coefficient of pid algorithm sets basic integral coefficient.
Step 15: using real time exhaust gas temperature and the difference for setting target exhaust temperature as deviation, based on deviation to electronics The aperture of expansion valve carries out PID control.
The step 15 is transferred by step 13 or step 14, that is, in step 13 according to the first setting rule or step 14 piece According to the integral coefficient of the second setting rule or corresponding with the real time execution frequency pid algorithm of third setting Rule it Afterwards, based on acquired integral coefficient to the integral coefficient assignment in pid algorithm, the process of PID tune valve is then executed.
The process of PID tune valve specifically: calculate real time exhaust gas temperature and setting target exhaust temperature acquired in step 11 The difference of degree is as deviation, using the deviation as the deviation in PID control, and the integration system obtained based on step 13 or step 14 Number is used as parameter, executes PID control, realizes the PID control process to electronic expansion valve opening.Wherein, target exhaust temperature is set Degree refers to the delivery temperature that expectation reaches, moreover, setting target exhaust temperature includes setting segmented objects delivery temperature and setting Final goal delivery temperature.Setting final goal delivery temperature is a final delivery temperature to be achieved, and sets segmentation mesh Marking delivery temperature can be one, can also be multiple, each setting segmented objects delivery temperature respectively less than setting final goal row Temperature degree.The purpose that setting segmented objects delivery temperature is arranged is that the target for adjusting PID carries out treatment by stages, is shortened each The difference namely deviation of real time exhaust gas temperature and target exhaust temperature in treatment process reduce the hyperharmonic oscillation that PID is adjusted, Shorten the time for being stabilized to final goal delivery temperature.For all setting target exhaust temperatures, can preset, it can also To determine in real time.For example, determined in real time according to cold medium flux, alternatively, determined according to compressor operating frequency, alternatively, according to Outdoor environment temperature determines.
When carrying out PID to electric expansion valve using the above method and adjusting control, in compressor real time execution frequency less than the The low-frequency operation stage of one setpoint frequency selects lesser integral coefficient as the integral coefficient of pid algorithm, so that low-frequency operation Adjust regulated value when valve smaller in the process, the fluctuation that the fluctuation and valve opening for reducing delivery temperature are adjusted.And it is real-time in compressor Running frequency is not less than the non-low-frequency operation stage of the first setpoint frequency, selects biggish integral coefficient as the product of pid algorithm Divide coefficient, so that regulated value is larger during non-low-frequency operation, adjusts valve speed fast.To, in entire compressor operational process, Electronic expansion valve opening adjusting is accurate, stablizes, and is conducive to the promotion of air conditioner coolant circulatory system Energy Efficiency Ratio.Also, in compressor The low-frequency operation stage uses different integral coefficients according to the difference of outdoor environment temperature, can reduce outer circumstance temperature mal-condition The fluctuation that the fluctuation of compressor air-discharging caused by lower and valve opening are adjusted.Moreover, because having comprehensively considered compressor self-operating ginseng It is several with external environment operating condition, increase this tunes valve method to being generally applicable under the air conditioner of different type of machines, difference operating condition Property.In addition, being less than the segmented objects delivery temperature of final goal delivery temperature by setting, segmentation realizes that delivery temperature is stabilized to Final goal delivery temperature, can reduce PID adjusting hyperharmonic oscillation, shorten be stabilized to final goal delivery temperature when Between.
As preferred embodiment, the first setting in step 13 is regular are as follows: integral coefficient is the 5th setting integration system Number.Moreover, according to the integral coefficient of the first setting Rule pid algorithm specifically: the integral coefficient of pid algorithm to be assigned a value of 5th setting integral coefficient.That is, in the case where compressor real time execution frequency is not less than the first setpoint frequency, pid algorithm Integral coefficient be a fixed value.It is designed in this way, preferable regulating effect can be obtained with simple processing mode.
After getting integral coefficient by step 13, for the assignment of the differential coefficient in step 15 in pid algorithm, It is not especially limited, can be fixed value.And for the assignment of the proportionality coefficient in pid algorithm, preferably according to the integral of acquisition Coefficient determines.To make the adjusting of valve opening more stable, as preferred embodiment, in step 13 according to the first setting After the integral coefficient of Rule pid algorithm, further includes: obtained according to the first corresponding relationship of integral coefficient and proportionality coefficient With according to the first corresponding proportionality coefficient of the setting integral coefficient of pid algorithm of Rule.In this case, in step 15, PID In control according to the proportionality coefficient of pid algorithm the first corresponding relationship of the integral coefficient and proportionality coefficient obtain and step 13 proportionality coefficients according to corresponding to the integral coefficient of the pid algorithm of the first setting Rule.It is furthermore preferred that in integral coefficient When setting integral coefficient for the 5th, it is also a fixed value that proportionality coefficient, which is the first setting ratio coefficient,.
And in step 14, the second setting rule used under cooling condition preferably includes:
Outer circumstance temperature and real time execution frequency are set less than the second setpoint frequency less than first in real-time outdoor environment temperature When, integral coefficient is the basic integral coefficient of the first setting;
Outer circumstance temperature is set less than first in real-time outdoor environment temperature and real time execution frequency is not less than the second setpoint frequency When, integral coefficient ki meets ki=(the second setpoint frequency of f-) * 2+ first and sets basic integral coefficient;
Outer circumstance temperature and real time execution frequency are set less than the second setpoint frequency not less than first in real-time outdoor environment temperature When, integral coefficient is the basic integral coefficient of the second setting;
Outer circumstance temperature is set not less than first in real-time outdoor environment temperature and real time execution frequency is not less than the second setting frequency When rate, integral coefficient ki meets ki=(the second setpoint frequency of f-) * 2+ second and sets basic integral coefficient;
Wherein, for the second setpoint frequency less than the first setpoint frequency, f is real time execution frequency.
Under cooling condition, the second setpoint frequency by setting less than the first setpoint frequency is further determined, thus Form frequency buffering being judged compressor real time execution frequency, being formed by the first setpoint frequency and the second setpoint frequency Area, using with [ki=(the second setpoint frequency of f-) * 2+ first sets basic integral coefficient] or [ki=(f- in the buffer area Second setpoint frequency) * 2+ second sets basic integral coefficient] linear formula obtain integral coefficient, avoid because integral coefficient from The fluctuation that electronic expansion valve opening caused by mutation of the low-frequency operation stage to the non-low-frequency operation stage is adjusted.
Moreover, as previously indicated, being not less than in step 13 according to the integral coefficient of the pid algorithm of the first setting Rule According to the integral coefficient of the pid algorithm of the second setting Rule in step 14, therefore, first sets basic integral coefficient and the Two, which set basic integral coefficients, is respectively less than the 5th setting integral coefficient, and according to formula [ki=(the second setpoint frequency of f-) * 2+ the One set basic integral coefficient] or formula [ki=(the second setpoint frequency of f-) * 2+ second sets basic integral coefficient] determine The maximum value of integral coefficient is the 5th setting integral coefficient, and cannot be greater than the 5th setting integral coefficient.For example, if according to above-mentioned The calculated integral coefficient ki of formula is less than the 5th setting integral coefficient, then ki value is the value calculated according to formula;And if root According to the calculated integral coefficient ki of above-mentioned formula not less than the 5th setting integral coefficient, then ki value is the 5th setting integration system Number.
After getting integral coefficient by step 14 under cooling condition, for the differential in step 15 in pid algorithm The assignment of coefficient, is not especially limited, and can be fixed value.And for the assignment of the proportionality coefficient in pid algorithm, it is also preferred that root It is determined according to the integral coefficient of acquisition.To make the adjusting of valve opening more stable, as preferred embodiment, in step 14 After the integral coefficient of the second setting Rule pid algorithm, further includes: according to the second of integral coefficient and proportionality coefficient Corresponding relationship, which is obtained, sets the corresponding proportionality coefficient of the integral coefficient of pid algorithm of Rule with according to second.In this case, In step 15, the proportionality coefficient of pid algorithm is to be obtained according to the second corresponding relationship of integral coefficient and proportionality coefficient in PID control , with step 14 according to the second corresponding proportionality coefficient of the setting integral coefficient of pid algorithm of Rule.It is furthermore preferred that the Two corresponding relationships are as follows: if integral coefficient, not less than the 6th setting integral coefficient, proportionality coefficient is the second setting ratio coefficient;If product Divide coefficient less than the 6th setting integral coefficient, proportionality coefficient is third setting ratio coefficient.Wherein, the second setting ratio coefficient is big In third setting ratio coefficient.
At step 14, the third setting rule used under heating condition preferably includes:
It is greater than the outer circumstance temperature of the second setting and real time execution frequency less than the second setpoint frequency in real-time outdoor environment temperature When, integral coefficient is that third sets basic integral coefficient;
It is greater than the outer circumstance temperature of the second setting in real-time outdoor environment temperature and real time execution frequency is not less than the second setpoint frequency When, integral coefficient ki meets ki=(the second setpoint frequency of f-) * 1+ third and sets basic integral coefficient;
Outer circumstance temperature and real time execution frequency are set less than the second setpoint frequency no more than second in real-time outdoor environment temperature When, integral coefficient is the basic integral coefficient of the 4th setting;
Outer circumstance temperature is set no more than second in real-time outdoor environment temperature and real time execution frequency is not less than the second setting frequency When rate, integral coefficient ki meets ki=(the second setpoint frequency of f-) * 1+ the 4th and sets basic integral coefficient;
Wherein, the second setpoint frequency and the first setpoint frequency are same as described above, and f is the real time execution frequency.
Likewise, the second setpoint frequency by setting less than the first setpoint frequency is further sentenced under heating condition It is fixed, thus formed it is that compressor real time execution frequency is judged, formed by the first setpoint frequency and the second setpoint frequency Frequency buffer area, in the buffer area using have [ki=(the second setpoint frequency of f-) * 1+ third sets basic integral coefficient] or The linear formula of [ki=(the second setpoint frequency of f-) * 1+ the 4th sets basic integral coefficient] obtains integral coefficient, avoids because of integral The fluctuation that coefficient is adjusted from the low-frequency operation stage to electronic expansion valve opening caused by the mutation in non-low-frequency operation stage.
Moreover, as previously indicated, being not less than in step 14 according to the integral coefficient of the pid algorithm of the first setting Rule The integral coefficient of the pid algorithm of Rule is set in step 14 according to third, therefore, third sets basic integral coefficient and the Four, which set basic integral coefficients, is respectively less than the 5th setting integral coefficient, and according to formula [ki=(the second setpoint frequency of f-) * 1+ the Three set basic integral coefficients] or formula [ki=(the second setpoint frequency of f-) * 1+ the 4th sets basic integral coefficient] determine The maximum value of integral coefficient is the 5th setting integral coefficient, and cannot be greater than the 5th setting integral coefficient.For example, if according to above-mentioned The calculated integral coefficient ki of formula is less than the 5th setting integral coefficient, then ki value is the value calculated according to formula;And if root According to the calculated integral coefficient ki of above-mentioned formula not less than the 5th setting integral coefficient, then ki value is the 5th setting integration system Number.
After getting integral coefficient by step 14 under heating condition, for the differential in step 15 in pid algorithm The assignment of coefficient, is not especially limited, and can be fixed value.And for the assignment of the proportionality coefficient in pid algorithm, it is also preferred that root It is determined according to the integral coefficient of acquisition.To make the adjusting of valve opening more stable, as preferred embodiment, in step 14 After the integral coefficient for setting Rule pid algorithm according to third, further includes: according to the third of integral coefficient and proportionality coefficient Corresponding relationship obtain with according to the corresponding proportionality coefficient of the third setting integral coefficient of pid algorithm of Rule.In this situation Under, in step 15, integral coefficient pass corresponding with the third of proportionality coefficient according to the proportionality coefficient of pid algorithm in PID control It is that system obtains, with step 14 according to the corresponding proportionality coefficient of the third setting integral coefficient of pid algorithm of Rule.More preferably , third corresponding relationship are as follows: if integral coefficient, not less than the 7th setting integral coefficient, proportionality coefficient is the 4th setting ratio system Number;If integral coefficient is the 5th setting ratio coefficient less than the 7th setting integral coefficient, proportionality coefficient.Wherein, the 4th setting ratio Example coefficient is greater than the 5th setting ratio coefficient.
In the description of above-mentioned each preferred embodiment, basic integral coefficient, the second setting basis integral are set with first Coefficient, third set basic integral coefficient and the basic integral coefficient of the 4th setting is similar, the second setpoint frequency, the 5th setting integral Coefficient, the 6th setting integral coefficient, the 7th setting integral coefficient, the first corresponding relationship, the second corresponding relationship, the corresponding pass of third System, the first setting ratio coefficient, the second setting ratio coefficient, third setting ratio coefficient, the 4th setting ratio coefficient and the 5th Setting ratio coefficient, be also it is known, be stored in advance in air-conditioner controller, also can be modified by authorization.It is right In each setting value, preferred value are as follows: the second setpoint frequency is 25Hz, and first set basic integral coefficient be 6, and the second setting is basic long-pending Point coefficient is 3, and third set basic integral coefficient as 6, and the 4th sets basis integral coefficient as 3, the 5th set integral coefficient as 12, the 6th sets integral coefficient as 6, and the 7th to set basic integral coefficient be 6, and the first setting ratio coefficient is 200, and second sets Proportionality coefficient is 200, and third setting ratio coefficient is 100, and the 4th setting ratio coefficient is 200, and the 5th setting ratio coefficient is 100。
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited;Although referring to aforementioned reality Applying example, invention is explained in detail, for those of ordinary skill in the art, still can be to aforementioned implementation Technical solution documented by example is modified or equivalent replacement of some of the technical features;And these are modified or replace It changes, the spirit and scope for claimed technical solution of the invention that it does not separate the essence of the corresponding technical solution.

Claims (10)

1. a kind of method for controlling air conditioner electronic expansion valve, which is characterized in that the described method includes:
After compressor start operation, real time execution frequency, real time exhaust gas temperature and the real-time outdoor environment temperature of compressor are obtained, The real time execution frequency is made comparisons with the first setpoint frequency;
If the real time execution frequency is not less than first setpoint frequency, according to the product of the first setting Rule pid algorithm Divide coefficient;If the real time execution frequency is less than first setpoint frequency, following treatment processes is executed:
Under refrigerating operaton operating condition, the real-time outdoor environment temperature is made comparisons with the first outer circumstance temperature of setting, if the real-time room External environment temperature is less than the outer circumstance temperature of first setting, sets basic integral coefficient and the second setting Rule according to first The integral coefficient of pid algorithm;If the real-time outdoor environment temperature is not less than the outer circumstance temperature of first setting, according to the second setting The integral of basic integral coefficient and the second setting Rule pid algorithm;According to the PID of the first setting Rule The integral coefficient of algorithm is not less than the integral coefficient of the pid algorithm according to the second setting Rule, first setting Basic integral coefficient is greater than described second and sets basic integral coefficient;
Under heating operation operating condition, the real-time outdoor environment temperature is made comparisons with the second outer circumstance temperature of setting, if the real-time room External environment temperature is greater than the outer circumstance temperature of second setting, sets basic integral coefficient according to third and third sets Rule The integral coefficient of pid algorithm;If the real-time outdoor environment temperature is no more than the outer circumstance temperature of second setting, according to the 4th setting The integral coefficient of basic integral coefficient and third setting Rule pid algorithm;According to the first setting Rule Pid algorithm integral coefficient be not less than according to the third set Rule pid algorithm integral coefficient, the third It sets basic integral coefficient and is greater than the basic integral coefficient of the 4th setting;
Then, with the real time exhaust gas temperature and setting segmented objects delivery temperature or the difference for setting final goal delivery temperature As deviation, PID control is carried out based on aperture of the deviation to electric expansion valve;It is described set segmented objects delivery temperature as One or more, each setting segmented objects delivery temperature are respectively less than the setting final goal delivery temperature;The PID The integral coefficient of pid algorithm is to be set according to the first setting rule or the second setting rule or the third in control The integral coefficient of Rule.
2. the method for control air conditioner electronic expansion valve according to claim 1, which is characterized in that the first setting rule Are as follows: integral coefficient is the 5th setting integral coefficient;
The integral coefficient according to the first setting Rule pid algorithm specifically: assign the integral coefficient of the pid algorithm Value is the 5th setting integral coefficient.
3. the method for control air conditioner electronic expansion valve according to claim 2, which is characterized in that set according to described first After the integral coefficient for determining Rule pid algorithm, further includes: obtained according to the first corresponding relationship of integral coefficient and proportionality coefficient Take with according to the corresponding proportionality coefficient of the first setting integral coefficient of pid algorithm of Rule;And in the PID control The proportionality coefficient of pid algorithm be obtained according to the first corresponding relationship of the integral coefficient and proportionality coefficient, with according to described The corresponding proportionality coefficient of integral coefficient of the pid algorithm of first setting Rule.
4. the method for control air conditioner electronic expansion valve according to claim 3, which is characterized in that first corresponding relationship Are as follows: integral coefficient is the 5th setting integral coefficient, and proportionality coefficient is the first setting ratio coefficient.
5. the method for control air conditioner electronic expansion valve according to claim 1, which is characterized in that the second setting rule Include:
The real-time outdoor environment temperature is less than the first outer circumstance temperature of setting and the real time execution frequency is less than the second setting When frequency, integral coefficient is the basic integral coefficient of the first setting;
The real-time outdoor environment temperature, which is less than described first and sets outer circumstance temperature and the real time execution frequency, is not less than described the When two setpoint frequencies, integral coefficient ki meets ki=(the second setpoint frequency of f-) * 2+ first and sets basic integral coefficient;
The real-time outdoor environment temperature sets outer circumstance temperature and the real time execution frequency not less than described first less than described the When two setpoint frequencies, integral coefficient is the basic integral coefficient of the second setting;
The real-time outdoor environment temperature sets outer circumstance temperature not less than described first and the real time execution frequency is not less than described When the second setpoint frequency, integral coefficient ki meets ki=(the second setpoint frequency of f-) * 2+ second and sets basic integral coefficient;
Second setpoint frequency is less than first setpoint frequency, and f is the real time execution frequency.
6. the method for control air conditioner electronic expansion valve according to claim 5, which is characterized in that set according to described second After the integral coefficient for determining Rule pid algorithm, further includes: obtained according to the second corresponding relationship of integral coefficient and proportionality coefficient Take with according to the corresponding proportionality coefficient of the second setting integral coefficient of pid algorithm of Rule;And in the PID control The proportionality coefficient of pid algorithm be obtained according to the second corresponding relationship of the integral coefficient and proportionality coefficient, with according to described The corresponding proportionality coefficient of integral coefficient of the pid algorithm of second setting Rule.
7. the method for control air conditioner electronic expansion valve according to claim 6, which is characterized in that second corresponding relationship Are as follows: if integral coefficient is the second setting ratio coefficient not less than the 6th setting integral coefficient, proportionality coefficient;If integral coefficient is less than The 6th setting integral coefficient, proportionality coefficient are third setting ratio coefficient;The second setting ratio coefficient is greater than described Third setting ratio coefficient.
8. the method for control air conditioner electronic expansion valve according to claim 1, which is characterized in that the third setting rule Include:
The real-time outdoor environment temperature is greater than the second outer circumstance temperature of setting and the real time execution frequency is less than the second setting When frequency, integral coefficient is that the third sets basic integral coefficient;
The real-time outdoor environment temperature, which is greater than described second and sets outer circumstance temperature and the real time execution frequency, is not less than described the When two setpoint frequencies, integral coefficient ki meets ki=(the second setpoint frequency of f-) * 1+ third and sets basic integral coefficient;
The real-time outdoor environment temperature sets outer circumstance temperature and the real time execution frequency no more than described second less than described the When two setpoint frequencies, integral coefficient is the basic integral coefficient of the 4th setting;
The real-time outdoor environment temperature sets outer circumstance temperature no more than described second and the real time execution frequency is not less than described When the second setpoint frequency, integral coefficient ki meets ki=(the second setpoint frequency of f-) * 1+ the 4th and sets basic integral coefficient;
Second setpoint frequency is less than first setpoint frequency, and f is the real time execution frequency.
9. the method for control air conditioner electronic expansion valve according to claim 8, which is characterized in that set according to the third After the integral coefficient for determining Rule pid algorithm, further includes: obtained according to the third corresponding relationship of integral coefficient and proportionality coefficient It takes and sets the corresponding proportionality coefficient of the integral coefficient of pid algorithm of Rule with according to the third;And in the PID control The proportionality coefficient of pid algorithm be obtained according to the third corresponding relationship of the integral coefficient and proportionality coefficient, with according to described Third sets the corresponding proportionality coefficient of integral coefficient of the pid algorithm of Rule.
10. the method for control air conditioner electronic expansion valve according to claim 9, which is characterized in that the third is corresponding to close System are as follows: if integral coefficient, not less than the 7th setting integral coefficient, proportionality coefficient is the 4th setting ratio coefficient;If integral coefficient is small In the 7th setting integral coefficient, proportionality coefficient is the 5th setting ratio coefficient;The 4th setting ratio coefficient is greater than institute State the 5th setting ratio coefficient.
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