CN106152646B  The method for controlling air conditioner electronic expansion valve  Google Patents
The method for controlling air conditioner electronic expansion valve Download PDFInfo
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 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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 230000001276 controlling effect Effects 0.000 title claims abstract description 5
 230000000875 corresponding Effects 0.000 claims description 34
 238000000034 method Methods 0.000 claims description 11
 238000010438 heat treatment Methods 0.000 claims description 9
 238000007710 freezing Methods 0.000 abstract 1
 238000004378 air conditioning Methods 0.000 description 7
 239000002826 coolant Substances 0.000 description 6
 238000001816 cooling Methods 0.000 description 6
 230000001105 regulatory Effects 0.000 description 6
 230000011218 segmentation Effects 0.000 description 3
 238000007599 discharging Methods 0.000 description 2
 230000035772 mutation Effects 0.000 description 2
 241000208340 Araliaceae Species 0.000 description 1
 235000003140 Panax quinquefolius Nutrition 0.000 description 1
 230000003139 buffering Effects 0.000 description 1
 230000000694 effects Effects 0.000 description 1
 230000005611 electricity Effects 0.000 description 1
 230000004907 flux Effects 0.000 description 1
 235000005035 ginseng Nutrition 0.000 description 1
 235000008434 ginseng Nutrition 0.000 description 1
 239000003507 refrigerant Substances 0.000 description 1
 238000005057 refrigeration Methods 0.000 description 1
 238000005070 sampling Methods 0.000 description 1
Classifications

 F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
 F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
 F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEATPUMP SYSTEMS
 F25B49/00—Arrangement or mounting of control or safety devices
 F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plant or systems

 F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
 F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
 F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEATPUMP SYSTEMS
 F25B41/00—Fluidcirculation arrangements
 F25B41/30—Expansion means; Dispositions thereof
 F25B41/31—Expansion valves

 F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
 F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
 F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEATPUMP SYSTEMS
 F25B2600/00—Control issues
 F25B2600/25—Control of valves
 F25B2600/2513—Expansion valves

 Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSSSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSSREFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
 Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
 Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED ENDUSER APPLICATIONS
 Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
 Y02B30/70—Efficient 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 realtime 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 realtime 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 realtime 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
Technical field
The invention belongs to airconditioning technique fields, are to relate to more specifically specifically, being to be related to the adjusting of airconditioning
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 airconditioning 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 airconditioning 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 realtime 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 realtime 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 realtime 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 realtime 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 realtime 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 lowfrequency operation stage, select lesser integral coefficient as the integration system of pid algorithm
Number, so that adjust regulated value when valve smaller during lowfrequency operation, the fluctuation that the fluctuation and valve opening for reducing delivery temperature are adjusted；
And in the compressor nonlowfrequency operation stage, select biggish integral coefficient as the integral coefficient of pid algorithm, so that nonlow 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 lowfrequency operation stage, according to room
The difference of external environment temperature uses different integral coefficients, can reduce caused compressor airdischarging wave under outer circumstance temperature malcondition
The fluctuation that dynamic and valve opening is adjusted.Moreover, because having comprehensively considered compressor selfoperating 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 realtime 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 airconditioning 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.Realtime 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 airconditioner 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 lowfrequency operation Yu nonlowfrequency 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 nonlow 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 lowfrequency operation.
If operation of air conditioner cooling condition, advised according to the size relation and the second setting of realtime 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 realtime 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 lowfrequency operation, by realtime 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 realtime 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 airconditioning 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 realtime 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 lowfrequency operation state, basis
The integral coefficient of the pid algorithm of second setting Rule.And under compressor lowfrequency 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 lowfrequency operation, realtime 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 noncryogenic, 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 airconditioning 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 realtime 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 lowfrequency operation state, basis
Third sets the integral coefficient of the pid algorithm of Rule.And under compressor lowfrequency operation state, if outdoor environment temperature
Greater than the second outer circumstance temperature of setting, show that outer work condition is noncryogenic, 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 lowfrequency operation stage of one setpoint frequency selects lesser integral coefficient as the integral coefficient of pid algorithm, so that lowfrequency 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 realtime in compressor
Running frequency is not less than the nonlowfrequency 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 nonlowfrequency 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 lowfrequency operation stage uses different integral coefficients according to the difference of outdoor environment temperature, can reduce outer circumstance temperature malcondition
The fluctuation that the fluctuation of compressor airdischarging caused by lower and valve opening are adjusted.Moreover, because having comprehensively considered compressor selfoperating 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 realtime outdoor environment temperature
When, integral coefficient is the basic integral coefficient of the first setting；
Outer circumstance temperature is set less than first in realtime 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 realtime 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 realtime 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 lowfrequency operation stage to the nonlowfrequency 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 abovementioned
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 abovementioned 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 realtime 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 realtime 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 realtime 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 realtime 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 lowfrequency operation stage to electronic expansion valve opening caused by the mutation in nonlowfrequency 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 abovementioned
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 abovementioned 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 abovementioned 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 airconditioner 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 longpending
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 realtime 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 realtime outdoor environment temperature is made comparisons with the first outer circumstance temperature of setting, if the realtime 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 realtime 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 realtime outdoor environment temperature is made comparisons with the second outer circumstance temperature of setting, if the realtime 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 realtime 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 realtime 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 realtime 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 realtime 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 realtime 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 realtime 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 realtime 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 realtime 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 realtime 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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