CN106019941A - Electronic expansion valve model coefficient determination method and device - Google Patents
Electronic expansion valve model coefficient determination method and device Download PDFInfo
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- CN106019941A CN106019941A CN201610458393.XA CN201610458393A CN106019941A CN 106019941 A CN106019941 A CN 106019941A CN 201610458393 A CN201610458393 A CN 201610458393A CN 106019941 A CN106019941 A CN 106019941A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
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Abstract
The invention discloses an electronic expansion valve model coefficient determination method and device. The method comprises the following steps: carrying out calculation based on experiment test data of an electronic expansion valve to obtain a pressure-drop coefficient of an pre-established electronic expansion valve model; inputting pressure drop to be measured to the electronic expansion valve model obtained after calculating the pressure-drop coefficient; carrying out analog computation through the electronic expansion valve model to obtain flow corresponding to the pressure drop to be measured; judging whether the error between the flow corresponding to the pressure drop to be measured obtained after analog and flow corresponding to the pressure drop to be measured in the experiment test surpasses a preset range; and if the error does not surpass the preset range, serving the calculated pressure-drop coefficient as the pressure-drop coefficient of the electronic expansion valve model. Through the method and device, analog simulation precision of the electronic expansion valve is improved.
Description
Technical field
The present invention relates to electric expansion valve field, in particular to the coefficient side of determination of a kind of electric expansion valve model
Method and device.
Background technology
Each big production industry is the most progressively come in present day analog emulation, such as air conditioner industry, analog simulation compared to
The experiment test of catalog, its cost is substantially reduced, and therefore, analog simulation replaces experiment test to be situation institute
Become.Before product is simulated emulation, it is required for this Modeling in Product, then, utilizes the model after modeling
Analog equipment working condition.
In electric expansion valve field, in current industry simulation softward, electric expansion valve modeling is the most all similar to as orifice throttle,
This mode is low to the analog simulation precision of electric expansion valve, and error is bigger.
For problem low to the analog simulation precision of electric expansion valve in prior art, effective solution is the most not yet proposed
Certainly scheme.
Summary of the invention
Present invention is primarily targeted at and provide the coefficient of a kind of electric expansion valve model to determine method and apparatus, to solve
Problem low to the analog simulation precision of electric expansion valve in prior art.
To achieve these goals, an aspect according to embodiments of the present invention, it is provided that a kind of electric expansion valve model
Coefficient determine method, including: utilize the test data of experiment of electric expansion valve to be calculated the electronics pre-build swollen
The pressure-drop coefficient of swollen valve model；Described electric expansion valve mode input pressure drop to be measured after calculating pressure-drop coefficient；By
Described electric expansion valve modeling is calculated the flow that described pressure drop to be measured is corresponding；Judge that simulation is treated described in obtaining
Pressure measurement drops whether the error of flow corresponding to corresponding flow pressure drop to be measured with described in experiment test exceedes preset range；
When described error is less than described preset range, using the pressure-drop coefficient that calculates as described electric expansion valve model
Pressure-drop coefficient.
Further, when described error exceedes described preset range, described method also includes: recalculate described pressure
Fall coefficient, until described error is less than described preset range.
Further, the test data of experiment utilizing electric expansion valve is calculated the electric expansion valve model pre-build
Pressure-drop coefficient include: obtain the flow of described electric expansion valve and the pressure drop of correspondence thereof that experiment test obtains；Determine
The signal that the flow of the described electric expansion valve that described experiment test obtains is corresponding inputs parameter；And described experiment is surveyed
The flow of described electric expansion valve that obtains of examination and the pressure drop of correspondence thereof and the signal determined input parameter and are input in advance
In the computing formula of the electric expansion valve model set up, it is calculated the pressure-drop coefficient of described electric expansion valve model, its
In, the signal of described computing formula flow with described electric expansion valve for representing electric expansion valve inputs parameter and pressure
Relation between fall, described signal input parameter is for representing the opening control signal of described electric expansion valve.
Further, it is determined that the signal input parameter that the flow of described electric expansion valve that obtains of described experiment test is corresponding
Including: obtain aperture step number corresponding to the flow of the described electric expansion valve that described experiment test obtains and described electronics is swollen
The maximum opening step number of swollen valve；By described aperture step number divided by the maximum opening step number of described electric expansion valve, obtain institute
State the signal input parameter determined.
Further, it is determined that the signal input parameter that the flow of described electric expansion valve that obtains of described experiment test is corresponding
Including: obtain the described electric expansion valve flow that maximum opening step number is corresponding in experiment test；By described experiment test
The flow of the described electric expansion valve obtained divided by flow corresponding to described maximum opening step number, obtain described in determine
Signal input parameter.
Further, the flow obtaining the described electric expansion valve that experiment test obtains includes: obtain in different entrance pressures
The flow of the described electric expansion valve that experiment test obtains under power and/or different degree of supercooling；Determine that described experiment test obtains
Signal input parameter corresponding to the flow of described electric expansion valve include: calculate in multiple different inlet pressures and/or many
The flow that under individual different degree of supercooling, the flow of the described electric expansion valve that experiment test obtains is corresponding with maximum opening step number
Multiple ratios；Calculate the meansigma methods of the plurality of ratio, obtain described in determine signal input parameter.
To achieve these goals, another aspect according to embodiments of the present invention, it is provided that a kind of electric expansion valve model
Coefficient determining device, including the first computing unit, for utilizing the test data of experiment of electric expansion valve to calculate
Pressure-drop coefficient to the electric expansion valve model pre-build；Input block, for the institute after calculating pressure-drop coefficient
State the pressure drop to be measured of electric expansion valve mode input；Second computing unit, based on by described electric expansion valve modeling
Calculate and obtain the flow that described pressure drop to be measured is corresponding；Judging unit, is used for judging to simulate the pressure drop described to be measured obtained corresponding
The error of flow corresponding to flow pressure drop to be measured with described in experiment test whether exceed preset range；Determine unit,
For when described error is less than described preset range, using the pressure-drop coefficient that calculates as described electric expansion valve mould
The pressure-drop coefficient of type.
Further, described device also includes: call unit, is used for when described error exceedes described preset range,
Call described first computing unit, described input block and described second computing unit, to recalculate described pressure drop system
Number, until described error is less than described preset range.
Further, described first computing unit includes: acquisition module, for obtaining the described electricity that experiment test obtains
The flow of sub-expansion valve and the pressure drop of correspondence thereof；Determine module, for determining the described electronics that described experiment test obtains
The signal that the flow of expansion valve is corresponding inputs parameter；And computing module, described in described experiment test is obtained
The electronics that the flow of electric expansion valve and the pressure drop of correspondence thereof and the signal input parameter determined are input to pre-build is swollen
In the computing formula of swollen valve model, it is calculated the pressure-drop coefficient of described electric expansion valve model, wherein, described calculating
Formula is for representing the pass between the flow of electric expansion valve and signal input parameter and the pressure drop of described electric expansion valve
System, described signal input parameter is for representing the opening control signal of described electric expansion valve.
Further, described determine that module includes: first obtains submodule, for obtaining what described experiment test obtained
Aperture step number that the flow of described electric expansion valve is corresponding and the maximum opening step number of described electric expansion valve；First calculates
Submodule, for by described aperture step number divided by the maximum opening step number of described electric expansion valve, obtain described in determine
Signal input parameter.
Further, described determine that module includes: second obtains submodule, is used for obtaining described electric expansion valve in reality
The flow that in test examination, maximum opening step number is corresponding；Second calculating sub module, for the institute obtained by described experiment test
State the flow of electric expansion valve divided by flow corresponding to described maximum opening step number, obtain described in the signal input determined
Parameter.
Further, described acquisition module includes: the 3rd obtains submodule, for obtain different inlet pressures and/
Or the flow of the described electric expansion valve that experiment test obtains under difference degree of supercooling；Described determine that module includes: the 3rd meter
Operator module, for calculating under multiple different inlet pressures and/or multiple different degree of supercooling described in experiment test obtains
Multiple ratios of the flow that the flow of electric expansion valve is corresponding with maximum opening step number；4th calculating sub module, by based on
Calculate the meansigma methods of the plurality of ratio, obtain described in determine signal input parameter.
According to embodiments of the present invention, by the electric expansion valve model pre-build, and the experiment of electric expansion valve is utilized
Test data calculate the pressure-drop coefficient of this electric expansion valve model, thus obtain may be used at the beginning of simulation electronic expansion valve
The electric expansion valve model begun, then recycles and inputs pressure drop to be measured in the electric expansion valve model that this is initial, obtain
Its analog result, compares the result that this analog result and actual experiment are tested, and requires the most not if error meets
Exceed preset range, then corresponding pressure-drop coefficient is solidified, as the pressure-drop coefficient value that electric expansion valve model is final,
So, it is achieved the control to electric expansion valve simulation precision, for the model having cured in prior art,
Improve the analog simulation precision of electric expansion valve.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart that the coefficient of electric expansion valve model according to embodiments of the present invention determines method；
Fig. 2 is the schematic diagram of the coefficient determining device of electric expansion valve model according to embodiments of the present invention.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with in the embodiment of the present invention
Accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that described embodiment
It is only the embodiment of a present invention part rather than whole embodiments.Based on the embodiment in the present invention, ability
The every other embodiment that territory those of ordinary skill is obtained under not making creative work premise, all should belong to
The scope of protection of the invention.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that this
The data that sample uses can be exchanged in the appropriate case, in order to embodiments of the invention described herein.Additionally, term
" include " and " having " and their any deformation, it is intended that cover non-exclusive comprising, such as, comprise
The process of series of steps or unit, method, system, product or equipment are not necessarily limited to those steps clearly listed
Rapid or unit, but can include that the most clearly list or intrinsic for these processes, method, product or equipment
Other step or unit.
The coefficient embodiments providing a kind of electric expansion valve model determines method.This device can be by calculating
Machine equipment realizes its function.
Fig. 1 is the flow chart that the coefficient of electric expansion valve model according to embodiments of the present invention determines method.Such as Fig. 1 institute
Showing, it is as follows that the method comprising the steps of:
Step S102, utilizes the test data of experiment of electric expansion valve to be calculated the electric expansion valve model pre-build
Pressure-drop coefficient.
Test data of experiment refers to actual product or catalog are carried out the data that experiment test obtains, including experiment
Pressure drop that test obtains, flow, density etc. the parameter of refrigerating fluid, these parameters can be that corresponding relation is stored in reality
Test in test database.
Electric expansion valve model is the operation principle according to electric expansion valve, and parameter involved in work process
The phantom pre-build, wherein, involved parameter includes the area of pressure drop, density, flow, import and export
Deng, certainly, also include that the signal of the aperture size for reacting electric expansion valve inputs parameter.Wherein, this electronics is swollen
Swollen valve model also has a pressure-drop coefficient, and this coefficient needs to carry out solidifying finally to improve this electric expansion valve model,
Therefore, before determining pressure-drop coefficient, this electric expansion valve model is also preliminary phantom.
In the present embodiment, it is input to this first with actual product or catalog being carried out the data that experiment test obtains
In electric expansion valve model, the most inversely calculate the value of initial pressure-drop coefficient, thus obtain may be used for simulation electricity
The initial electric expansion valve model of sub-expansion valve.
Step S104, the electric expansion valve mode input pressure drop to be measured after calculating pressure-drop coefficient.
Step S106, is calculated, by electric expansion valve modeling, the flow that pressure drop to be measured is corresponding.
After obtaining initial electric expansion valve model, in this model, input pressure drop to be measured, be used for verifying this electronics
The analog result of expansion valve model.
Step S108, it is judged that simulate the stream that flow pressure drop to be measured with experiment test corresponding to the pressure drop to be measured obtained is corresponding
Whether the error of amount exceedes preset range.
Step S110, when error is less than preset range, using the pressure-drop coefficient that calculates as electric expansion valve model
Pressure-drop coefficient.
When error exceedes preset range, pressure-drop coefficient can be recalculated, until error is less than preset range.
After obtaining the analog result of initial electric expansion valve model, by itself and this pressure drop pair to be measured in experiment test
The flow answered contrasts, and calculates the error of analog result, it is judged that whether this error exceedes preset range, such as
± 5%, it is not above this scope, then shows to use the electric expansion valve analog simulation of above-mentioned calculated pressure-drop coefficient
The result precision obtained is high, then the value of this pressure-drop coefficient is as the value of the pressure-drop coefficient in electric expansion valve model, goes forward side by side
Row solidification, to obtain final electric expansion valve model.
According to embodiments of the present invention, by the electric expansion valve model pre-build, and the experiment of electric expansion valve is utilized
Test data calculate the pressure-drop coefficient of this electric expansion valve model, thus obtain may be used at the beginning of simulation electronic expansion valve
The electric expansion valve model begun, then recycles and inputs pressure drop to be measured in the electric expansion valve model that this is initial, obtain
Its analog result, compares the result that this analog result and actual experiment are tested, and requires the most not if error meets
Exceed preset range, then corresponding pressure-drop coefficient is solidified, as the pressure-drop coefficient value that electric expansion valve model is final,
So, it is achieved the control to electric expansion valve simulation precision, for the model having cured in prior art,
Improve the analog simulation precision of electric expansion valve.
Owing to electric expansion valve may be used in the various equipment needing throttling to control, therefore, the electronics of the present embodiment is swollen
Swollen valve model can be used for the emulation of corresponding equipment simulating.Such as, within air-conditioning systems, electric expansion valve is as joint
Fluid element, when carrying out the simulation of air conditioning system, uses the electric expansion valve model of the embodiment of the present invention can improve sky
The simulation precision of pressure drop in adjusting system, simulates the pressure drop by electric expansion valve and flow accurately, makes machine system
Heat exchange amount accuracy and drop simulation accuracy be all greatly improved, and stable within a scope, if
Traditional analog phantom error is ± 20%, uses the electric expansion valve model of the embodiment of the present invention can make analog simulation essence
Degree controls and stable within ± 5%, preset range will be set to ± 5%.
Preferably, the test data of experiment utilizing electric expansion valve is calculated the electric expansion valve model that pre-builds
Pressure-drop coefficient includes: obtain flow and the pressure drop of correspondence thereof of the electric expansion valve that experiment test obtains；Determine that experiment is surveyed
The signal that the flow of the electric expansion valve that examination obtains is corresponding inputs parameter；And the electric expansion valve that experiment test obtained
Flow and the pressure drop of correspondence and the signal input parameter the determined electric expansion valve model that is input to pre-build
In computing formula, being calculated the pressure-drop coefficient of electric expansion valve model, wherein, computing formula is used for representing that electronics is swollen
Relation between flow and signal input parameter and the pressure drop of electric expansion valve of swollen valve, signal input parameter is used for representing
The opening control signal of electric expansion valve.
Owing to flow and pressure drop can be obtained by experiment test substantially, it is possible to directly from test data of experiment storehouse
The parameters such as middle acquisition flow and pressure drop, during experiment, the aperture of electric expansion valve regulates voluntarily, so often
The all corresponding aperture of group data, that is to say corresponding signal input parameter, in the present embodiment, signal input parameter
The value in 0～1 can be taken, and the aperture of electric expansion valve also has its scope, the open range of such as electric expansion valve
It is 0～500 steps, in the present embodiment, after the flow getting experiment test and pressure drop, it may be determined that go out corresponding
Signal input parameter, then utilizes the computing formula of electric expansion valve model to be calculated pressure-drop coefficient.
Specifically, a kind of optional example of above-mentioned computing formula is such as:
Wherein, m is flow, and sig is that signal inputs parameter, areamaxFor importing and exporting maximum area, ρ is fluid density,
△ P is pressure drop,For pressure-drop coefficient.
By above-mentioned computing formula it can be seen that the parameter needing solidification is pressure-drop coefficient1 is constant therefore needs solid
Change parameter is that k, flow and pressure drop can be obtained by experiment test substantially, it is possible to be considered as flow and pressure drop is
Known parameters, unknown number to be calculated in formula has two groups one to be pressure-drop coefficient K, and one is signal parameter sig,
During experiment, the aperture of electric expansion valve regulates voluntarily, so the often all corresponding aperture of group data, electricity
The open range of sub-expansion valve is 0～500 steps, thus can determine that the value of signal input parameter.
Further, it is determined that signal input parameter corresponding to the flow of electric expansion valve that obtains of experiment test includes: obtain
Take aperture step number corresponding to the flow of the electric expansion valve that experiment test obtains and the maximum opening step number of electric expansion valve；
By aperture step number divided by the maximum opening step number of electric expansion valve, obtain the signal input parameter determined.
In the present embodiment, by the aperture step number of electric expansion valve determine signal input parameter, specifically, ought
The step number of front opening inputs parameter directly as signal, such as, if opening step number is 300 with the ratio of maximum opening step number
Step, signal input parameter can be considered 300/500=0.6.
Owing to using aperture step number to determine there is certain drawback in the mode of signal input parameter, that is to say, if electronics
Expansion valve creates drift, and (drift refers to that it may only have 280 steps or 320 when 300 step by electronic expansion valve controls
Step) just cannot input parameter by signal accurately, thus cause the pressure-drop coefficient determined that deviation occurs, in order to eliminate this
Kind of deviation, in the present embodiment, determines the signal input parameter bag that the flow of the electric expansion valve that experiment test obtains is corresponding
Include: obtain the electric expansion valve flow that maximum opening step number is corresponding in experiment test；The electronics that experiment test is obtained
The flow of expansion valve, divided by flow corresponding to maximum opening step number, obtains the signal input parameter determined.
In the present embodiment, using flow-rate ratio to input parameter as the signal of electric expansion valve, such as, if opening step number being
300 steps, now by flow be m1, the flow passed through during maximum opening 500 step is m2, then letter now
The value of number input parameter is m1/m2, thus can avoid owing to the impact that brought of drift occurs in electric expansion valve.
Further, obtain the flow of electric expansion valve that experiment test obtains to include: obtain different inlet pressures and/
Or the flow of the electric expansion valve that experiment test obtains under difference degree of supercooling；
Determine that the signal input parameter that the flow of the electric expansion valve that experiment test obtains is corresponding includes: calculate multiple not
The flow of the electric expansion valve obtained with experiment test under inlet pressure and/or multiple different degree of supercooling walks with maximum opening
Multiple ratios of the flow that number is corresponding；Calculate the meansigma methods of multiple ratio, obtain the signal input parameter determined.
Owing in test data, inlet pressure and the degree of supercooling of electric expansion valve can affect the flow by electric expansion valve,
So that calculated flow-rate ratio slightly difference in above-mentioned under different conditions, therefore, the present embodiment is by calculating
These ratios are averaged the most permissible by flow ratio under multiple different inlet pressures and different degree of supercooling again
The effective accuracy controlling input signal, so that needing the pressure-drop coefficient demarcating solidification more accurate.
The embodiment of the present invention additionally provides the coefficient determining device of a kind of electric expansion valve model.It should be noted that this
The coefficient determining device of the electric expansion valve model of inventive embodiments may be used for performing the electricity that the embodiment of the present invention is provided
The coefficient of sub-expansion valve model determines method, and the coefficient of the electric expansion valve model of the embodiment of the present invention determines that method also may be used
The coefficient determining device of the electric expansion valve model to be provided by the embodiment of the present invention is performed.
Fig. 2 is the schematic diagram of the coefficient determining device of electric expansion valve model according to embodiments of the present invention.Such as Fig. 2 institute
Showing, this device includes: the first computing unit 10, input block the 20, second computing unit 30, judging unit 40 and
Determine unit 50.
First computing unit 10 is for utilizing the test data of experiment of electric expansion valve to be calculated the electronics pre-build
The pressure-drop coefficient of expansion valve model.
Test data of experiment refers to actual product or catalog are carried out the data that experiment test obtains, including experiment
Pressure drop that test obtains, flow, density etc. the parameter of refrigerating fluid, these parameters can be that corresponding relation is stored in reality
Test in test database.
Electric expansion valve model is the operation principle according to electric expansion valve, and parameter involved in work process
The phantom pre-build, wherein, involved parameter includes the area of pressure drop, density, flow, import and export
Deng, certainly, also include that the signal of the aperture size for reacting electric expansion valve inputs parameter.Wherein, this electronics is swollen
Swollen valve model also has a pressure-drop coefficient, and this coefficient needs to carry out solidifying finally to improve this electric expansion valve model,
Therefore, before determining pressure-drop coefficient, this electric expansion valve model is also preliminary phantom.
In the present embodiment, it is input to this first with actual product or catalog being carried out the data that experiment test obtains
In electric expansion valve model, the most inversely calculate the value of initial pressure-drop coefficient, thus obtain may be used for simulation electricity
The initial electric expansion valve model of sub-expansion valve.
Input block 20 is for the electric expansion valve mode input pressure drop to be measured after calculating pressure-drop coefficient.
Second computing unit 30 is for being calculated, by electric expansion valve modeling, the flow that pressure drop to be measured is corresponding.
After obtaining initial electric expansion valve model, in this model, input pressure drop to be measured, be used for verifying this electronics
The analog result of expansion valve model.
Judging unit 40 is used for judging to simulate flow corresponding to the pressure drop to be measured obtained and pressure drop pair to be measured in experiment test
Whether the error of the flow answered exceedes preset range.
Determine unit 50 for when error is less than preset range, using the pressure-drop coefficient that calculates as electric expansion valve
The pressure-drop coefficient of model.
Preferably, device also includes: call unit, for when error exceedes preset range, calls the first calculating list
Unit, input block and the second computing unit, to recalculate pressure-drop coefficient, until error is less than preset range.
When error exceedes preset range, pressure-drop coefficient can be recalculated, until error is less than preset range.
After obtaining the analog result of initial electric expansion valve model, by itself and this pressure drop pair to be measured in experiment test
The flow answered contrasts, and calculates the error of analog result, it is judged that whether this error exceedes preset range, such as
± 5%, it is not above this scope, then shows to use the electric expansion valve analog simulation of above-mentioned calculated pressure-drop coefficient
The result precision obtained is high, then the value of this pressure-drop coefficient is as the value of the pressure-drop coefficient in electric expansion valve model, goes forward side by side
Row solidification, to obtain final electric expansion valve model.
According to embodiments of the present invention, by the electric expansion valve model pre-build, and the experiment of electric expansion valve is utilized
Test data calculate the pressure-drop coefficient of this electric expansion valve model, thus obtain may be used at the beginning of simulation electronic expansion valve
The electric expansion valve model begun, then recycles and inputs pressure drop to be measured in the electric expansion valve model that this is initial, obtain
Its analog result, compares the result that this analog result and actual experiment are tested, and requires the most not if error meets
Exceed preset range, then corresponding pressure-drop coefficient is solidified, as the pressure-drop coefficient value that electric expansion valve model is final,
So, it is achieved the control to electric expansion valve simulation precision, for the model having cured in prior art,
Improve the analog simulation precision of electric expansion valve.
Owing to electric expansion valve may be used in the various equipment needing throttling to control, therefore, the electronics of the present embodiment is swollen
Swollen valve model can be used for the emulation of corresponding equipment simulating.Such as, within air-conditioning systems, electric expansion valve is as joint
Fluid element, when carrying out the simulation of air conditioning system, uses the electric expansion valve model of the embodiment of the present invention can improve sky
The simulation precision of pressure drop in adjusting system, simulates the pressure drop by electric expansion valve and flow accurately, makes machine system
Heat exchange amount accuracy and drop simulation accuracy be all greatly improved, and stable within a scope, if
Traditional analog phantom error is ± 20%, uses the electric expansion valve model of the embodiment of the present invention can make analog simulation essence
Degree controls and stable within ± 5%, preset range will be set to ± 5%.
Preferably, the first computing unit includes: acquisition module, for obtaining electric expansion valve that experiment test obtains
Flow and the pressure drop of correspondence thereof；Determine module, corresponding for determining the flow of electric expansion valve that experiment test obtains
Signal input parameter；And computing module, for the flow of electric expansion valve that experiment test is obtained and correspondence thereof
Pressure drop and the signal determined input in the computing formula of the electric expansion valve model that parameter is input to pre-build, calculate
Obtaining the pressure-drop coefficient of electric expansion valve model, wherein, computing formula is for representing flow and the electronics of electric expansion valve
Relation between signal input parameter and the pressure drop of expansion valve, signal input parameter is for representing the aperture of electric expansion valve
Control signal.
Owing to flow and pressure drop can be obtained by experiment test substantially, it is possible to directly from test data of experiment storehouse
The parameters such as middle acquisition flow and pressure drop, during experiment, the aperture of electric expansion valve regulates voluntarily, so often
The all corresponding aperture of group data, that is to say corresponding signal input parameter, in the present embodiment, signal input parameter
The value in 0～1 can be taken, and the aperture of electric expansion valve also has its scope, the open range of such as electric expansion valve
It is 0～500 steps, in the present embodiment, after the flow getting experiment test and pressure drop, it may be determined that go out corresponding
Signal input parameter, then utilizes the computing formula of electric expansion valve model to be calculated pressure-drop coefficient.
Specifically, a kind of optional example of above-mentioned computing formula is such as:
Wherein, m is flow, and sig is that signal inputs parameter, areamaxFor importing and exporting maximum area, ρ is fluid density,
△ P is pressure drop,For pressure-drop coefficient.
By above-mentioned computing formula it can be seen that the parameter needing solidification is pressure-drop coefficient1 is constant therefore needs solid
Change parameter is that k, flow and pressure drop can be obtained by experiment test substantially, it is possible to be considered as flow and pressure drop is
Known parameters, unknown number to be calculated in formula has two groups one to be pressure-drop coefficient K, and one is signal parameter sig,
During experiment, the aperture of electric expansion valve regulates voluntarily, so the often all corresponding aperture of group data, electricity
The open range of sub-expansion valve is 0～500 steps, thus can determine that the value of signal input parameter.
Further, it is determined that module includes: first obtains submodule, for obtaining the electronic expansion that experiment test obtains
Aperture step number that the flow of valve is corresponding and the maximum opening step number of electric expansion valve；First calculating sub module, for opening
Degree step number, divided by the maximum opening step number of electric expansion valve, obtains the signal input parameter determined.
In the present embodiment, by the aperture step number of electric expansion valve determine signal input parameter, specifically, ought
The step number of front opening inputs parameter directly as signal, such as, if opening step number is 300 with the ratio of maximum opening step number
Step, signal input parameter can be considered 300/500=0.6.
Owing to using aperture step number to determine there is certain drawback in the mode of signal input parameter, that is to say, if electronics
Expansion valve creates drift, and (drift refers to that it may only have 280 steps or 320 when 300 step by electronic expansion valve controls
Step) just cannot input parameter by signal accurately, thus cause the pressure-drop coefficient determined that deviation occurs, in order to eliminate this
Plant deviation, in the present embodiment, determine that module includes: second obtains submodule, be used for obtaining electric expansion valve in experiment
The flow that in test, maximum opening step number is corresponding；Second calculating sub module, for the electronic expansion obtained by experiment test
The flow of valve, divided by flow corresponding to maximum opening step number, obtains the signal input parameter determined.
In the present embodiment, using flow-rate ratio to input parameter as the signal of electric expansion valve, such as, if opening step number being
300 steps, now by flow be m1, the flow passed through during maximum opening 500 step is m2, then letter now
The value of number input parameter is m1/m2, thus can avoid owing to the impact that brought of drift occurs in electric expansion valve.
Further, acquisition module includes: the 3rd obtains submodule, for obtaining in different inlet pressures and/or difference
The flow of the electric expansion valve that experiment test obtains under degree of supercooling；Determine that module includes: the 3rd calculating sub module, be used for
Calculate the flow of the electric expansion valve that experiment test obtains under multiple different inlet pressures and/or multiple different degree of supercooling
Multiple ratios of the flow corresponding with maximum opening step number；4th calculating sub module, for calculating the average of multiple ratio
Value, obtains the signal input parameter determined.
Owing in test data, inlet pressure and the degree of supercooling of electric expansion valve can affect the flow by electric expansion valve,
So that calculated flow-rate ratio slightly difference in above-mentioned under different conditions, therefore, the present embodiment is by calculating
These ratios are averaged the most permissible by flow ratio under multiple different inlet pressures and different degree of supercooling again
The effective accuracy controlling input signal, so that needing the pressure-drop coefficient demarcating solidification more accurate.
It should be noted that for aforesaid each method embodiment, in order to be briefly described, therefore it is all expressed as one it be
The combination of actions of row, but those skilled in the art should know, the present invention not limiting by described sequence of movement
System, because according to the present invention, some step can use other orders or carry out simultaneously.Secondly, art technology
Personnel also should know, embodiment described in this description belongs to preferred embodiment, involved action and module
Not necessarily necessary to the present invention.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and does not has the portion described in detail in certain embodiment
Point, may refer to the associated description of other embodiments.
In several embodiments provided herein, it should be understood that disclosed device, can be by other side
Formula realizes.Such as, device embodiment described above is only schematically, the division of the most described unit, only
Being only a kind of logic function to divide, actual can have other dividing mode when realizing, and the most multiple unit or assembly can
To combine or to be desirably integrated into another system, or some features can be ignored, or does not performs.Another point, is shown
The coupling each other shown or discuss or direct-coupling or communication connection can be by some interfaces, device or unit
INDIRECT COUPLING or communication connection, can be being electrical or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to
On multiple NEs.Some or all of unit therein can be selected according to the actual needs to realize the present embodiment
The purpose of scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated
Unit both can realize to use the form of hardware, it would however also be possible to employ the form of SFU software functional unit realizes.
If described integrated unit realizes and as independent production marketing or use using the form of SFU software functional unit
Time, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme
Completely or partially can producing with software of the part that the most in other words prior art contributed or this technical scheme
The form of product embodies, and this computer software product is stored in a storage medium, including some instructions in order to make
Obtain a computer equipment (can be personal computer, mobile terminal, server or the network equipment etc.) and perform this
All or part of step of method described in each embodiment bright.And aforesaid storage medium includes: USB flash disk, read-only storage
Device (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory),
The various media that can store program code such as portable hard drive, magnetic disc or CD.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made
Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.
Claims (12)
1. the coefficient of an electric expansion valve model determines method, it is characterised in that including:
The test data of experiment utilizing electric expansion valve is calculated the pressure drop of the electric expansion valve model pre-build
Coefficient；
Described electric expansion valve mode input pressure drop to be measured after calculating pressure-drop coefficient；
It is calculated the flow that described pressure drop to be measured is corresponding by described electric expansion valve modeling；
Judge that the flow pressure drop to be measured with described in experiment test simulating the pressure drop described to be measured obtained corresponding is corresponding
Whether the error of flow exceedes preset range；
When described error is less than described preset range, using the pressure-drop coefficient that calculates as described electronic expansion
The pressure-drop coefficient of valve model.
Method the most according to claim 1, it is characterised in that when described error exceedes described preset range, institute
Method of stating also includes:
Recalculate described pressure-drop coefficient, until described error is less than described preset range.
Method the most according to claim 1 and 2, it is characterised in that utilize the test data of experiment of electric expansion valve
The pressure-drop coefficient being calculated the electric expansion valve model pre-build includes:
Obtain flow and the pressure drop of correspondence thereof of the described electric expansion valve that experiment test obtains；
Determine the signal input parameter that the flow of the described electric expansion valve that described experiment test obtains is corresponding；And
The flow of described electric expansion valve that described experiment test is obtained and the pressure drop of correspondence thereof and the letter determined
Number input parameter is input in the computing formula of electric expansion valve model pre-build, is calculated described electronics
The pressure-drop coefficient of expansion valve model,
Wherein, described computing formula is for representing that the flow of electric expansion valve is defeated with the signal of described electric expansion valve
Entering the relation between parameter and pressure drop, described signal input parameter is for representing the aperture control of described electric expansion valve
Signal processed.
Method the most according to claim 3, it is characterised in that determine that the described electronics that described experiment test obtains is swollen
The signal input parameter that the flow of swollen valve is corresponding includes:
Obtain aperture step number corresponding to the flow of the described electric expansion valve that described experiment test obtains and described electronics
The maximum opening step number of expansion valve；
By described aperture step number divided by the maximum opening step number of described electric expansion valve, obtain described in the letter determined
Number input parameter.
Method the most according to claim 3, it is characterised in that determine that the described electronics that described experiment test obtains is swollen
The signal input parameter that the flow of swollen valve is corresponding includes:
Obtain the described electric expansion valve flow that maximum opening step number is corresponding in experiment test；
The flow of the described electric expansion valve obtained by described experiment test is corresponding divided by described maximum opening step number
Flow, obtain described in determine signal input parameter.
Method the most according to claim 3, it is characterised in that
Obtain the flow of described electric expansion valve that experiment test obtains to include: obtain in different inlet pressures and/or
The flow of the described electric expansion valve that experiment test obtains under different degree of supercoolings；
Determine that the signal input parameter that the flow of the described electric expansion valve that described experiment test obtains is corresponding includes:
Calculate the described electronics that experiment test obtains under multiple different inlet pressures and/or multiple different degree of supercooling
Multiple ratios of the flow that the flow of expansion valve is corresponding with maximum opening step number；Calculate the average of the plurality of ratio
Value, obtain described in determine signal input parameter.
7. the coefficient determining device of an electric expansion valve model, it is characterised in that including:
First computing unit, for utilizing the test data of experiment of electric expansion valve to be calculated the electricity pre-build
The pressure-drop coefficient of sub-expansion valve model；
Input block, for the described electric expansion valve mode input pressure drop to be measured after calculating pressure-drop coefficient；
Second computing unit is corresponding for being calculated described pressure drop to be measured by described electric expansion valve modeling
Flow；
Judging unit, is used for judging to simulate described in flow corresponding to the pressure drop described to be measured obtained and experiment test
Whether the error of the flow that pressure drop to be measured is corresponding exceedes preset range；
Determine unit, for when described error is less than described preset range, the pressure-drop coefficient calculated is made
Pressure-drop coefficient for described electric expansion valve model.
Device the most according to claim 7, it is characterised in that described device also includes:
Call unit, for when described error exceedes described preset range, call described first computing unit,
Described input block and described second computing unit, to recalculate described pressure-drop coefficient, until described error is not
Exceed described preset range.
9. according to the device described in claim 7 or 8, it is characterised in that described first computing unit includes:
Acquisition module, for obtaining flow and the pressure drop of correspondence thereof of the described electric expansion valve that experiment test obtains；
Determine module, for determining the signal that the flow of described electric expansion valve that described experiment test obtains is corresponding
Input parameter；And
Computing module, for the flow of described electric expansion valve obtained by described experiment test and the pressure of correspondence thereof
Fall and the signal determined input in the computing formula of the electric expansion valve model that parameter is input to pre-build, meter
Calculate the pressure-drop coefficient obtaining described electric expansion valve model,
Wherein, described computing formula is for representing that the flow of electric expansion valve is defeated with the signal of described electric expansion valve
Entering the relation between parameter and pressure drop, described signal input parameter is for representing the aperture control of described electric expansion valve
Signal processed.
Device the most according to claim 9, it is characterised in that described determine that module includes:
First obtains submodule, corresponding for obtaining the flow of the described electric expansion valve that described experiment test obtains
Aperture step number and the maximum opening step number of described electric expansion valve；
First calculating sub module, for by described aperture step number divided by the maximum opening step number of described electric expansion valve,
The signal input parameter determined described in obtaining.
11. devices according to claim 9, it is characterised in that described determine that module includes:
Second obtains submodule, is used for obtaining described electric expansion valve maximum opening step number in experiment test corresponding
Flow；
Second calculating sub module, for the flow of described electric expansion valve that obtained by described experiment test divided by institute
State the flow that maximum opening step number is corresponding, obtain described in determine signal input parameter.
12. devices according to claim 9, it is characterised in that
Described acquisition module includes: the 3rd obtains submodule, for obtaining in different inlet pressures and/or different mistake
The flow of the described electric expansion valve that experiment test obtains under cold degree；
Described determine that module includes:
3rd calculating sub module, tests under multiple different inlet pressures and/or multiple different degree of supercooling for calculating
Multiple ratios of the flow that the flow of described electric expansion valve that test obtains is corresponding with maximum opening step number；4th
Calculating sub module, for calculating the meansigma methods of the plurality of ratio, obtain described in the signal input parameter determined.
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| CN201610458393.XA CN106019941A (en) | 2016-06-20 | 2016-06-20 | Electronic expansion valve model coefficient determination method and device |
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| CN201610458393.XA CN106019941A (en) | 2016-06-20 | 2016-06-20 | Electronic expansion valve model coefficient determination method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109386996A (en) * | 2018-10-08 | 2019-02-26 | 珠海格力电器股份有限公司 | A kind of control method and air-conditioning system of electric expansion valve |
| CN109946537A (en) * | 2019-03-06 | 2019-06-28 | 郑州商学院 | A kind of electric expansion valve analog circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603751A (en) * | 2009-07-15 | 2009-12-16 | 北京科技大学 | A kind of frequency conversion energy-saving control method of refrigeration system |
| CN103307754A (en) * | 2012-03-15 | 2013-09-18 | 珠海格力电器股份有限公司 | Method and device for controlling openings of electronic expansion valves of water heater and air conditioner |
| CN103486691A (en) * | 2013-09-17 | 2014-01-01 | 青岛海信日立空调系统有限公司 | Refrigerant flow control method and device for multi-connected air conditioning system |
| CN104633862A (en) * | 2015-02-03 | 2015-05-20 | 深圳麦格米特电气股份有限公司 | Control method of electronic expansion valve in refrigeration operation of variable frequency air conditioner |
| CN105423498A (en) * | 2015-12-21 | 2016-03-23 | 珠海格力电器股份有限公司 | Control method of air-conditioning system and air-conditioning system |
-
2016
- 2016-06-20 CN CN201610458393.XA patent/CN106019941A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603751A (en) * | 2009-07-15 | 2009-12-16 | 北京科技大学 | A kind of frequency conversion energy-saving control method of refrigeration system |
| CN103307754A (en) * | 2012-03-15 | 2013-09-18 | 珠海格力电器股份有限公司 | Method and device for controlling openings of electronic expansion valves of water heater and air conditioner |
| CN103486691A (en) * | 2013-09-17 | 2014-01-01 | 青岛海信日立空调系统有限公司 | Refrigerant flow control method and device for multi-connected air conditioning system |
| CN104633862A (en) * | 2015-02-03 | 2015-05-20 | 深圳麦格米特电气股份有限公司 | Control method of electronic expansion valve in refrigeration operation of variable frequency air conditioner |
| CN105423498A (en) * | 2015-12-21 | 2016-03-23 | 珠海格力电器股份有限公司 | Control method of air-conditioning system and air-conditioning system |
Non-Patent Citations (1)
| Title |
|---|
| 安贝贝 等: "《制冷系统中电子膨胀阀流量系数的实验研究》", 《机电信息》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109386996A (en) * | 2018-10-08 | 2019-02-26 | 珠海格力电器股份有限公司 | A kind of control method and air-conditioning system of electric expansion valve |
| CN109946537A (en) * | 2019-03-06 | 2019-06-28 | 郑州商学院 | A kind of electric expansion valve analog circuit |
| CN109946537B (en) * | 2019-03-06 | 2024-03-19 | 郑州商学院 | Electronic expansion valve analog circuit |
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