CN108954652A - Control method for electronic expansion valve and control device, air conditioner, computer readable storage medium - Google Patents
Control method for electronic expansion valve and control device, air conditioner, computer readable storage medium Download PDFInfo
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- CN108954652A CN108954652A CN201810642418.0A CN201810642418A CN108954652A CN 108954652 A CN108954652 A CN 108954652A CN 201810642418 A CN201810642418 A CN 201810642418A CN 108954652 A CN108954652 A CN 108954652A
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- Prior art keywords
- expansion valve
- difference
- temperature
- valve
- target exhaust
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The embodiment of the present invention discloses a kind of control method for electronic expansion valve, belongs to technical field of air conditioner.This method comprises: determining target exhaust temperature according to outdoor environment temperature；According to the difference of current exhaust gas temperature and target exhaust temperature, the valve opening of electric expansion valve is controlled.Using above-described embodiment, the electric expansion valve tune valve procedure ergodic time can be shortened, the corresponding valve opening of target exhaust temperature can be rapidly achieved.A kind of control device for electronic expansion valve, air conditioner, computer readable storage medium is also disclosed in the embodiment of the present invention.
Description
Technical field
The present invention relates to technical field of air conditioner, in particular to a kind of control method for electronic expansion valve and control dress
It sets, air conditioner, computer readable storage medium.
Background technique
For the control of electric expansion valve under cryogenic refrigeration state, the control mode of existing air conditioner is finding optimal mesh
When marking delivery temperature, using in such a way that the set time increases or decreases fixed aperture, i.e., gradually adds up or gradually pass
Subtract fixed aperture.This control mode is easy to operate, but when current valve opening and optimal valve opening difference comparsion are big, needs
The time of traversal is long, and the number for gradually adding up or gradually successively decreasing is more, is not able to satisfy and is rapidly achieved target exhaust temperature
Demand.
Such as in electric expansion valve slow-action valve, it is assumed that electric expansion valve minimum aperture is 70pls pulse angle, and maximum is opened
Degree is 500pls pulse angle, and current aperture is 200pls pulse angle, actual optimal aperture (when reaching target exhaust temperature
Valve opening) it is 400pls pulse angle, then needing time-consuming (400-200) * 30=according to the speed of 1 pulse angle of every 30 seconds pass valves
6000 seconds.Using existing control mode, the response time of valve events is excessively long.
Aperture when electric expansion valve how to be made quickly to reach target exhaust temperature reduces electric expansion valve tune valve events
It lasts, is current urgent problem to be solved.
Summary of the invention
The embodiment of the invention provides a kind of control method for electronic expansion valve and control devices, air conditioner, computer-readable
Storage medium, the electric expansion valve tune valve procedure ergodic time is short, can be rapidly achieved the corresponding aperture of target exhaust temperature.In order to
There is a basic understanding to some aspects of the embodiment of disclosure, simple summary is shown below.The summarized section is not
Extensive overview, nor to determine key/critical component or describe the protection scope of these embodiments.Its sole purpose is
Some concepts are presented with simple form, in this, as the preamble of following detailed description.
According to a first aspect of the embodiments of the present invention, a kind of control method for electronic expansion valve is provided.
In some optional embodiments, the control method for electronic expansion valve, comprising: according to outdoor environment temperature, determine
Target exhaust temperature；According to the difference of current exhaust gas temperature and target exhaust temperature, the valve opening of electric expansion valve is controlled.
According to a second aspect of the embodiments of the present invention, a kind of computer readable storage medium is provided.
In some optional embodiments, the computer readable storage medium, is stored thereon with computer program, when described
Control method for electronic expansion valve described in any of the above-described alternative embodiment is realized when computer program is executed by processor.
According to a third aspect of the embodiments of the present invention, a kind of control device for electronic expansion valve is provided.
In some optional embodiments, the control device for electronic expansion valve, comprising: first unit, for according to outdoor
Environment temperature determines target exhaust temperature；Second unit, for the difference according to current exhaust gas temperature and target exhaust temperature,
Control the valve opening of electric expansion valve.
According to a fourth aspect of the embodiments of the present invention, a kind of air conditioner is provided.
In some optional embodiments, the air conditioner includes electric expansion valve described in any of the above-described alternative embodiment
Control device.
It, can be according to the difference of current exhaust gas temperature and target exhaust temperature, using difference using above-mentioned alternative embodiment
Regulative mode control electric expansion valve valve opening, it is possible to reduce adjust the valve procedure ergodic time, can be rapidly achieved target row
The corresponding valve opening of temperature degree.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is an optional implementation process diagram of control method for electronic expansion valve；
Fig. 2 is the implementation process diagram of a specific example of control method for electronic expansion valve；
Fig. 3 is illustrated using implementing procedure of 0.618 control methods to the specific example that electric expansion valve closes valve operation
Figure；
Fig. 4 is illustrated using implementing procedure of 0.618 control methods to the specific example that electric expansion valve valve opening operates
Figure；
Fig. 5 is an optional implementation structural schematic diagram of control device for electronic expansion valve.
Specific embodiment
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Practice them.Other embodiments may include structure, logic, it is electrical, process and other change.Embodiment
Only represent possible variation.Unless explicitly requested, otherwise individual components and functionality is optional, and the sequence operated can be with
Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The range of bright embodiment includes equivalent obtained by the entire scope of claims and all of claims
Object.Herein, each embodiment individually or can be indicated generally with term " invention ", and it is convenient that this is used for the purpose of,
And if in fact disclosing the invention more than one, the range for being not meant to automatically limit the application is any single invention
Or inventive concept.Herein, relational terms such as first and second and the like be used only for by an entity or operation with
Another entity or operation distinguish, and without requiring or implying, there are any actual relationships between these entities or operation
Or sequence.Moreover, the terms "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, thus
So that process, method or equipment including a series of elements not only include those elements, but also including being not explicitly listed
Other element, or further include for this process, method or the intrinsic element of equipment.In the feelings not limited more
Under condition, the element that is limited by sentence "including a ...", it is not excluded that in process, method or equipment including the element
In there is also other identical elements.Each embodiment herein is described in a progressive manner, and each embodiment stresses
Be the difference from other embodiments, the same or similar parts in each embodiment may refer to each other.For implementing
For method, product etc. disclosed in example, since it is corresponding with method part disclosed in embodiment, so the comparison of description is simple
Single, reference may be made to the description of the method.
Fig. 1 shows an alternative embodiment of control method for electronic expansion valve.
In the alternative embodiment, the control method for electronic expansion valve, comprising:
Step 11, according to outdoor environment temperature, target exhaust temperature is determined.
Step 12, according to the difference of current exhaust gas temperature and target exhaust temperature, the valve opening of electric expansion valve is controlled.
The outdoor environment temperature can be obtained by temperature sensor, alternatively, can also be according to other ginsengs of air conditioner
Number is obtained by calculating.
The current exhaust gas temperature is obtained by temperature sensor, alternatively, can also be according to the other parameters of air conditioner
It is obtained by calculating.
Optionally, described according to outdoor environment temperature, in the step of determining target exhaust temperature, target exhaust temperature is root
It is obtained according to formula 1, formula 1 are as follows:
Tdtarget=CT+SH+C × Tao
Wherein, CT is the corresponding saturation temperature value of compressor condensing pressure, unit DEG C, CT=-0.0671P6+1.1596P5-
8.1454P4+30.236P3-66.004P2+ 101.88P-51.735, P are compressor high-pressure, can be by external pressure gauge
Or the pressure sensor installed on air conditioner measures, unit: MPa；
SH is evaporator superheat, usually takes 10 DEG C；
C is correction factor, value 0.1；
Tao is outdoor environment temperature.
For example, compressor high-pressure is 3.72Mpa, obtaining CT by CT calculation formula is 58.79 DEG C；Then, in outdoor
At Tao=43 DEG C of environment temperature, target exhaust temperature Tdtarget=58.79+10+0.1*43=73.09, round numbers
Tdtarget=73 DEG C.
Optionally, described according to outdoor environment temperature, in the step of determining target exhaust temperature, target exhaust temperature is root
It is tabled look-up acquisition according to outdoor environment temperature, the corresponding relationship of outdoor environment temperature and target exhaust temperature is preset in the table,
Such as:
When Tao≤- 5 DEG C of outdoor environment temperature, determine that target exhaust temperature is 66 DEG C；
When -5 DEG C of < outdoor environment temperature Tao≤5 DEG C, determine that target exhaust temperature is 70 DEG C；
When outdoor environment temperature Tao > 5 DEG C, determine that target exhaust temperature is 74 DEG C.
Optionally, preset outdoor environment temperature and the corresponding relationship of target exhaust temperature are according to experiment institute in above-mentioned table
It obtains.
Using alternative embodiment shown in FIG. 1, according to the difference of current exhaust gas temperature and target exhaust temperature, using difference
Regulative mode control electric expansion valve valve opening, it is possible to reduce adjust the valve procedure ergodic time, can be rapidly achieved target row
The corresponding valve opening of temperature degree.
In another alternative embodiment, the control method for electronic expansion valve, further includes: when current exhaust gas temperature and mesh
When marking difference the first difference condition of satisfaction of delivery temperature, electric expansion valve is carried out using 0.618 control methods to close valve operation.
Optionally, first difference condition is difference < A of current exhaust gas temperature Td Yu target exhaust temperature Tdtarget
DEG C, -3≤A≤- 1.For example, working as Tdtarget < -1 DEG C of target exhaust temperature of current exhaust gas temperature Td-, then according to 0.618 control
Method carries out electric expansion valve to close valve operation.
Optionally, it when the difference of current exhaust gas temperature and target exhaust temperature meets above-mentioned first difference condition, uses
0.618 control methods carry out the step of closing valve operation to electric expansion valve, comprising:
Firstly, adjusting electric expansion valve valve opening to Op.cur-0.618 (Op.cur-Op.min.al), wherein
Op.min.al be minimum allowable valve opening, Op.cur be current valve opening, the first preset time of steady running, first it is default when
Between be 10~30 seconds, such as 15 seconds, record Td-Tdtarget=N (N is absolute value, and non-algebraic value is hereafter identical)；
Then, electric expansion valve valve opening is adjusted to Op.min+0.618 (Op.cur-Op.min.al), steady running
Second preset time, the second preset time are 10~30 seconds, such as 15 seconds, (N ' was absolute value to record d-Tdtarget=N ', non-
Algebraic value, hereafter identical)；
Compare N-N ': if N-N ' > 0, recording new Direction interval is [Op.cur-0.618 (Op.cur-
Op.min.al), Op.cur]；If N-N ' < 0, recording new Direction interval is [Op.min.al, Op.min.al+0.618
(Op.cur-Op.min.al)]。
It repeats the above process, to the last once attempts valve opening (i.e. final valve opening) and preceding primary trial valve opening
Difference meets iteration precision, and iteration precision requires final attempt valve opening and the preceding primary difference for attempting valve opening to be less than D,
2≤D≤4, for example, when final attempt valve opening and the preceding primary difference for attempting valve opening are less than 3, then it is assumed that this time adjust
Reach the corresponding valve opening of target exhaust temperature.
In another alternative embodiment, the control method for electronic expansion valve, further includes: when current exhaust gas temperature and mesh
The difference for marking delivery temperature meets the second difference condition, carries out valve opening operation to electric expansion valve using 0.618 control methods.
Optionally, second difference condition is the difference > of current exhaust gas temperature Td Yu target exhaust temperature Tdtarget
B DEG C ,+1≤B≤+ 3.For example, when 1 DEG C of > of current exhaust gas temperature Td- target exhaust temperature Tdtarget, then according to 0.618 control
Preparation method carries out valve opening operation to electric expansion valve.
Optionally, it when the difference of current exhaust gas temperature and target exhaust temperature meets above-mentioned second difference condition, uses
The step of 0.618 control methods carry out valve opening operation to electric expansion valve, comprising:
Firstly, adjusting electric expansion valve valve opening to Op.max.al-0.618 (Op.max.al-Op.cur), wherein
Op.max.al be maximum allowable valve opening, Op.cur be current valve opening, the first preset time of steady running, first it is default when
Between be 10~30 seconds, such as 15 seconds, record Td-Tdtarget=N；
Then, electric expansion valve valve opening is adjusted to Op.cur+0.618 (Op.max.al-Op.cur), steady running
Second preset time, the second preset time are 10~30 seconds, such as 15 seconds, record Td-Tdtarget=N '；
Compare N-N ': if N-N ' > 0, recording new Direction interval is [Op.max.al-0.618* (Op.max.al-
Op.cur), Op.max.al]；If N-N ' < 0, recording new Direction interval is [Op.min.al, Op.min.al+0.618*
(Op.max.al-Op.cur)]。
It repeats the above process, to the last once attempts valve opening (i.e. final valve opening) and preceding primary trial valve opening
Difference meets iteration precision, and iteration precision requires final attempt valve opening and the preceding primary difference for attempting valve opening to be less than D,
2≤D≤4, for example, when final attempt valve opening and the preceding primary difference for attempting valve opening are less than 3, then it is assumed that this time adjust
Reach the corresponding valve opening of target exhaust temperature.
In another alternative embodiment, the control method for electronic expansion valve, further includes: when current exhaust gas temperature and mesh
When the difference of mark delivery temperature meets third difference condition, electric expansion valve is carried out with First Speed to close valve operation.
Optionally, the third difference condition is that the current exhaust gas temperature and the difference of the target exhaust temperature are greater than
Equal to A DEG C and be less than C DEG C, wherein -0.5≤C≤0, for example, third difference condition are as follows: -1 DEG C≤current exhaust gas temperature with
0 DEG C of the difference < of the target exhaust temperature.
Optionally, the First Speed is per 1 pulse angle of (10~20) second tune valve.
For example, when 0 DEG C of difference < of -1 DEG C≤current exhaust gas temperature and the target exhaust temperature, with every 10 seconds
1 pulse angle of valve is closed electric expansion valve is carried out to close valve operation.
In another alternative embodiment, the control method for electronic expansion valve, further includes: when current exhaust gas temperature and mesh
The difference for marking delivery temperature meets the 4th difference condition, carries out valve opening operation to electric expansion valve with second speed.
Optionally, the 4th difference condition is that the current exhaust gas temperature and the difference of the target exhaust temperature are greater than
E DEG C and it is less than or equal to B DEG C, wherein 0≤E≤0.5, for example, the 4th difference condition are as follows: current exhaust gas temperature described in 0 DEG C of < and institute
State difference≤1 DEG C of target exhaust temperature.
Optionally, the second speed is per 1 pulse angle of (10~20) second tune valve.
For example, at 1 DEG C of difference < of current exhaust gas temperature and the target exhaust temperature described in 0 DEG C of <, with every 10 seconds
It closes 1 pulse angle of valve and valve opening operation is carried out to electric expansion valve.
As target exhaust temperature Tdtarget=current exhaust gas temperature Td, then electric expansion valve is failure to actuate.
Fig. 2 shows a specific examples for adjust using the control method for electronic expansion valve valve operation.
In the example, the control method for electronic expansion valve the following steps are included:
Firstly, obtaining currently detected outdoor environment temperature Tao, target exhaust temperature Tdtarget is determined；Acquisition is worked as
Front exhaust temperature Td；Obtain the minimum valve opening Op.min.al in current outdoor ambient temperature range；Obtain current outdoor environment
Maximum valve opening Op.max.al in temperature range；Record current valve opening Op.cur.
Then, the mode for adjust to electric expansion valve valve operation is determined according to Td-Tdtarget:
When Td-Tdtarget < -1 DEG C, electric expansion valve is carried out using 0.618 control methods to close valve operation；
When 1 DEG C of Td-Tdtarget >, valve opening operation is carried out to electric expansion valve using 0.618 control methods；
As 0 DEG C of -1 DEG C≤Td-Tdtarget <, electric expansion valve is carried out with 1 pulse angle of every 10 seconds pass valves to close valve behaviour
Make；
When 0 DEG C of Td-Tdtarget≤1 DEG C <, valve opening behaviour is carried out to electric expansion valve with 1 pulse angle of every 10 seconds valve opening
Make；
When Td-Tdtarget=0 DEG C, electric expansion valve is failure to actuate.
In example shown in Fig. 2, it is assumed that Td-Tdtarget < -1 DEG C, then carried out using 0.618 control methods to electric expansion valve
Valve operation is closed, specific steps are referring to Fig. 3.
In example shown in Fig. 3, due to Td-Tdtarget < -1 DEG C, then adjust valve section be [Op.min.al, Op.cur).
Firstly, adjusting electric expansion valve valve opening to target value Op.try.L, Op.try.L=Op.cur-0.618
(Op.cur-Op.min.al), wherein Op.min.al is minimum allowable valve opening, and Op.cur is current valve opening, steady running
15 seconds, current exhaust gas temperature Td.try.L is read, calculates the deviation D .try.L of current exhaust gas temperature and target exhaust temperature,
D.try.L=| Td.try.L-Td.target |；
Then, electric expansion valve valve opening is adjusted to target value Op.try.R, Op.try.R=Op.min+0.618
(Op.cur-Op.min.al), current exhaust gas temperature Td.try.R is read in steady running 15 seconds；Calculate current exhaust gas temperature and mesh
Mark the deviation D .try.R, D.try.R=of delivery temperature | Td.try.R-Td.target |；
Compare D.try.L-D.try.R:
If D.try.L-D.try.R > 0, it is determined that adjusting valve section is [Op.try.L, Op.cur]；Electric expansion valve tune
It is whole to arrive Op.try.RR=Op.try.L+0.618 (Op.cur-Op.try.L), later, machine steady running 15 seconds；It obtains current
Delivery temperature Td.try.RR calculates the deviation D .try.RR=of current exhaust gas temperature and target exhaust temperature | Td.try.RR-
Td.target|；It enables: Op.top=Op.cur, Op.btm=Op.try.L, D.try.R=D.try.RR, D.try.L=
D.try.L, wherein Op.top is section maximum value, and Op.btm is section minimum value；Judge whether Op.top-Op.btm < 3, such as
Fruit is, then it is assumed that this time adjusts and reaches the corresponding valve opening of target exhaust temperature, stops valve regulation operation；If not, comparing
D.try.L-D.try.R repeats aforesaid operations if D.try.L-D.try.R > 0, if D.try.L-D.try.R < 0, into
Enter the operation under the conditions of following D.try.L-D.try.R < 0, interval endpoint accordingly replace；
If D.try.L-D.try.R < 0, it is determined that adjust valve section be [Op.min.al, Op.try.R)；Electronic expansion
Valve is adjusted to Op.try.LL=Op.try.R-0.618 (Op.try.R-Op.min.al), later, machine steady running 15 seconds；
Current exhaust gas temperature Td.try.LL is obtained, the deviation D .try.LL=of current exhaust gas temperature and target exhaust temperature is calculated |
Td.try.LL-Td.target|；It enables: Op.top=Op.try.L, Op.btm=Op.try.LL, D.try.R=D.try.L,
D.try.L=D.try.LL, Op.top are section maximum value, and Op.btm is section minimum value；Judge whether Op.top-Op.btm
< 3, the corresponding valve opening of target exhaust temperature is reached if it is, thinking this time to adjust, stops valve regulation operation；If not, than
Compared with D.try.L-D.try.R, if D.try.L-D.try.R < 0, aforesaid operations are repeated, if D.try.L-D.try.R > 0,
Operation under the conditions of above-mentioned D.try.L-D.try.R > 0 accordingly replace to interval endpoint.
In example shown in Fig. 2, it is assumed that 1 DEG C of Td-Tdtarget >, then carried out using 0.618 control methods to electric expansion valve
Valve opening operation, specific steps are referring to Fig. 4.
Fig. 5 shows an alternative embodiment of control device for electronic expansion valve.
In the alternative embodiment, the control device for electronic expansion valve S2, comprising: first unit S21, for according to outdoor
Environment temperature determines target exhaust temperature；Second unit S22, for the difference according to current exhaust gas temperature and target exhaust temperature
Value, controls the valve opening of electric expansion valve.
The outdoor environment temperature can be obtained by temperature sensor, alternatively, can also be according to other ginsengs of air conditioner
Number is obtained by calculating.
The current exhaust gas temperature can be obtained by temperature sensor, alternatively, can also be according to other ginsengs of air conditioner
Number is obtained by calculating.
Optionally, the first unit obtains target exhaust temperature according to formula 1 and outdoor environment temperature.Wherein, formula
1 are as follows:
Tdtarget=CT+SH+C × Tao
Wherein, CT is the corresponding saturation temperature value of compressor condensing pressure, unit DEG C, CT=-0.0671P6+1.1596P5-
8.1454P4+30.236P3-66.004P2+ 101.88P-51.735, P are compressor high-pressure, can be by external pressure gauge
Or the pressure sensor installed on air conditioner measures, unit: MPa；
SH is evaporator superheat, usually takes 10 DEG C；
C is correction factor, value 0.1；
Tao is outdoor environment temperature.
For example, compressor high-pressure is 3.72Mpa, obtaining CT by CT calculation formula is 58.79 DEG C；Then, in outdoor
At Tao=43 DEG C of environment temperature, target exhaust temperature Tdtarget=58.79+10+0.1*43=73.09, round numbers
Tdtarget=73 DEG C.
Optionally, the first unit is tabled look-up according to outdoor environment temperature obtains target exhaust temperature, pre- in the table
Corresponding relationship equipped with outdoor environment temperature and target exhaust temperature, such as:
When Tao≤- 5 DEG C of outdoor environment temperature, determine that target exhaust temperature is 66 DEG C；
When -5 DEG C of < outdoor environment temperature Tao≤5 DEG C, determine that target exhaust temperature is 70 DEG C；
When outdoor environment temperature Tao > 5 DEG C, determine that target exhaust temperature is 74 DEG C.
Optionally, preset outdoor environment temperature and the corresponding relationship of target exhaust temperature are according to experiment institute in above-mentioned table
It obtains.
Using alternative embodiment shown in fig. 5, according to the difference of current exhaust gas temperature and target exhaust temperature, using difference
Regulative mode control electric expansion valve valve opening, it is possible to reduce adjust the valve procedure ergodic time, can be rapidly achieved target row
The corresponding valve opening of temperature degree.
In another alternative embodiment, the second unit further includes first control unit, the first control unit
For when current exhaust gas temperature and target exhaust temperature difference meet the first difference condition when, using 0.618 control methods to electricity
Sub- expansion valve carries out closing valve operation.
Optionally, first difference condition is difference < A of current exhaust gas temperature Td Yu target exhaust temperature Tdtarget
DEG C, -3≤A≤- 1.For example, working as Tdtarget < -1 DEG C of target exhaust temperature of current exhaust gas temperature Td-, then according to 0.618 control
Method carries out electric expansion valve to close valve operation.
Optionally, when the difference of current exhaust gas temperature and target exhaust temperature meets above-mentioned first difference condition, described
One control unit carries out electric expansion valve using 0.618 control methods to close valve operation, comprising:
Firstly, adjusting electric expansion valve valve opening to Op.cur-0.618 (Op.cur-Op.min.al), wherein
Op.min.al be minimum allowable valve opening, Op.cur be current valve opening, the first preset time of steady running, first it is default when
Between be 10~30 seconds, such as 15 seconds, record Td-Tdtarget=N；
Then, electric expansion valve valve opening is adjusted to Op.min+0.618 (Op.cur-Op.min.al), steady running
Second preset time, the second preset time are 10~30 seconds, such as 15 seconds, record d-Tdtarget=N '；
Compare N-N ': if N-N ' > 0, recording new Direction interval is [Op.cur-0.618 (Op.cur-
Op.min.al), Op.cur]；If N-N ' < 0, recording new Direction interval is [Op.min.al, Op.min.al+0.618
(Op.cur-Op.min.al)]。
It repeats the above process, to the last once attempts valve opening (i.e. final valve opening) and preceding primary trial valve opening
Difference meets iteration precision, and iteration precision requires final attempt valve opening and the preceding primary difference for attempting valve opening to be less than D,
2≤D≤4, for example, when final attempt valve opening and the preceding primary difference for attempting valve opening are less than 3, then it is assumed that this time adjust
Reach the corresponding valve opening of target exhaust temperature.
In another alternative embodiment, the second unit further includes the second control unit, second control unit
Meet the second difference condition for the difference when current exhaust gas temperature and target exhaust temperature, using 0.618 control methods to electronics
Expansion valve carries out valve opening operation.
Optionally, second difference condition is the difference > of current exhaust gas temperature Td Yu target exhaust temperature Tdtarget
B DEG C ,+1≤B≤+ 3.For example, working as 1 DEG C of > of current exhaust gas temperature Td- target exhaust temperature Tdtarget, then according to 0.618 control
Method carries out valve opening operation to electric expansion valve.
Optionally, when the difference of current exhaust gas temperature and target exhaust temperature meets above-mentioned second difference condition, described
The step of two control units carry out valve opening operation to electric expansion valve using 0.618 control methods, comprising:
Firstly, adjusting electric expansion valve valve opening to Op.max.al-0.618 (Op.max.al-Op.cur), wherein
Op.max.al be maximum allowable valve opening, Op.cur be current valve opening, the first preset time of steady running, first it is default when
Between be 10~30 seconds, such as 15 seconds, record Td-Tdtarget=N；
Then, electric expansion valve valve opening is adjusted to Op.cur+0.618 (Op.max.al-Op.cur), steady running
Second preset time, the second preset time are 10~30 seconds, such as 15 seconds, record Td-Tdtarget=N '；
Compare N-N ': if N-N ' > 0, recording new Direction interval is [Op.max.al-0.618* (Op.max.al-
Op.cur), Op.max.al]；If N-N ' < 0, recording new Direction interval is [Op.min.al, Op.min.al+0.618*
(Op.max.al-Op.cur)]。
It repeats the above process, to the last once attempts valve opening (i.e. final valve opening) and preceding primary trial valve opening
Difference meets iteration precision, and iteration precision requires final attempt valve opening and the preceding primary difference for attempting valve opening to be less than D,
2≤D≤4, for example, when final attempt valve opening and the preceding primary difference for attempting valve opening are less than 3, then it is assumed that this time adjust
Reach the corresponding valve opening of target exhaust temperature.
In another alternative embodiment, the second unit further includes third control unit, the third control unit
For when the difference of current exhaust gas temperature and target exhaust temperature meets third difference condition, with First Speed to electronic expansion
Valve carries out closing valve operation.
Optionally, the third difference condition is that the current exhaust gas temperature and the difference of the target exhaust temperature are greater than
Equal to A DEG C and be less than C DEG C, wherein -0.5≤C≤0, for example, third difference condition are as follows: -1 DEG C≤current exhaust gas temperature with
0 DEG C of the difference < of the target exhaust temperature.
Optionally, the First Speed is per 1 pulse angle of (10~20) second tune valve.
For example, when 0 DEG C of difference < of -1 DEG C≤current exhaust gas temperature and the target exhaust temperature, the third
Control unit carries out electric expansion valve with 1 pulse angle of every 10 seconds pass valves to close valve operation.
In another alternative embodiment, the second unit further includes the 4th control unit, the 4th control unit
For when current exhaust gas temperature and target exhaust temperature difference meet four difference conditions when, with second speed to electronic expansion
Valve carries out valve opening operation.
Optionally, the 4th difference condition is that the current exhaust gas temperature and the difference of the target exhaust temperature are greater than
E DEG C and it is less than or equal to B DEG C, wherein 0≤E≤0.5, for example, the 4th difference condition are as follows: current exhaust gas temperature described in 0 DEG C of < and institute
State difference≤1 DEG C of target exhaust temperature.
Optionally, the second speed is per 1 pulse angle of (10~20) second tune valve.
For example, when difference≤1 DEG C of current exhaust gas temperature and the target exhaust temperature described in 0 DEG C of <, the described 4th
Control unit carries out valve opening operation to electric expansion valve with 1 pulse angle of every 10 seconds pass valves.
As target exhaust temperature Tdtarget=current exhaust gas temperature Td, then electric expansion valve is failure to actuate.
The specific example that the control device for electronic expansion valve adjust valve operation is given below.
In the example, the control device for electronic expansion valve includes: counter Timer, records Current electronic expansion respectively
It is Op.cur (Op.cur >=0, integer) that valve, which sends out aperture, and current exhaust gas temperature is Td (Td >=0, integer)；Further include memory, deposits
It is Op.max.al, minimum allowable valve opening Op.min.al that certain bit address unit, which stores maximum allowable valve opening, in reservoir
(Op.max.al >=0, Op.min.al >=0, and be all integer).
Second unit determines the mode for adjust to electric expansion valve valve operation according to Td-Tdtarget:
When Td-Tdtarget < -1 DEG C, electric expansion valve is carried out using 0.618 control methods to close valve operation；
When 1 DEG C of Td-Tdtarget >, valve opening operation is carried out to electric expansion valve using 0.618 control methods；
As 0 DEG C of -1 DEG C≤Td-Tdtarget <, electric expansion valve is carried out with 1 pulse angle of every 10 seconds pass valves to close valve behaviour
Make；
When 0 DEG C of Td-Tdtarget≤1 DEG C <, valve opening behaviour is carried out to electric expansion valve with 1 pulse angle of every 10 seconds valve opening
Make；
When Td-Tdtarget=0 DEG C, electric expansion valve is failure to actuate.
For example, Td-Tdtarget > 1 DEG C, then adjust valve section be (Op.cur, Op.max.al], then second unit first adjusts
The valve opening of electric expansion valve is to target Op.max.al-0.618 (Op.max.al-Op.cur)；Steady running 15 seconds, record
Td-Tdtarget=N；Then, second unit adjusts the valve opening of electric expansion valve to target Op.cur+0.618
(Op.max.al-Op.cur), steady running 15 seconds record Td-Tdtarget=N '.
Next, second unit compares N-N ': if N-N ' > 0, recording new Direction interval is [Op.max.al-
0.618* (Op.max.al-Op.cur), Op.max.al]；If N-N ' < 0, recording new Direction interval is
[Op.min.al, Op.min.al+0.618* (Op.max.al-Op.cur)].
Second unit repeats the above process, and to the last once attempts preceding primary trial aperture < 3 of aperture-, then it is assumed that this time
It adjusts and reaches the corresponding valve opening of target exhaust temperature.
In some optional embodiments, a kind of air conditioner is proposed, wherein the air conditioner includes that previously described electronics is swollen
Swollen control valve device.
Optionally, previously described control device for electronic expansion valve can be realized in air conditioner side, alternatively, can also be in net
It is realized in the server of network side, alternatively, can also realize in the terminal.
In some optional embodiments, it proposes a kind of computer readable storage medium, is stored thereon with computer program, when
The computer program realizes control method for electronic expansion valve as previously described when being executed by processor.It is above-mentioned computer-readable
Storage medium can be read-only memory (Read Only Memory, ROM), random access memory (Random Access
Memory, RAM), tape and light storage device etc..
In alternative embodiment described herein, it should be understood that disclosed method, product (including but not limited to fill
Set, equipment etc.), it may be implemented in other ways.For example, the apparatus embodiments described above are merely exemplary,
For example, the division of the unit, only a kind of logical function partition, there may be another division manner in actual implementation, example
As multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.
Another point, shown or discussed mutual coupling, direct-coupling or communication connection can be through some interfaces, dress
It sets or the indirect coupling or communication connection of unit, can be electrical property, mechanical or other forms.It is described to be used as separate part description
Unit may or may not be physically separated, component shown as a unit may or may not be
Physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to the actual needs
Some or all of the units may be selected to achieve the purpose of the solution of this embodiment.In addition, in each embodiment of the present invention
Each functional unit can integrate in one processing unit, be also possible to each unit and physically exist alone, can also be two
Or more than two units are integrated in one unit.
It should be understood that the invention is not limited to the process and structure that are described above and are shown in the accompanying drawings,
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by the attached claims
System.
Claims (10)
1. a kind of control method for electronic expansion valve characterized by comprising
According to outdoor environment temperature, target exhaust temperature is determined；
According to the difference of current exhaust gas temperature and target exhaust temperature, the valve opening of electric expansion valve is controlled.
2. method as described in claim 1, which is characterized in that
When the difference of current exhaust gas temperature and target exhaust temperature meets the first difference condition, using 0.618 control methods to electricity
Sub- expansion valve carries out closing valve operation.
3. method as described in claim 1, which is characterized in that
When the difference of current exhaust gas temperature and target exhaust temperature meets the second difference condition, using 0.618 control methods to electricity
Sub- expansion valve carries out valve opening operation.
4. method as described in claim 1, which is characterized in that
When the difference of current exhaust gas temperature and target exhaust temperature meets third difference condition, with First Speed to electronic expansion
Valve carries out closing valve operation.
5. method as described in claim 1, which is characterized in that
When the difference of current exhaust gas temperature and target exhaust temperature meets four difference conditions, with second speed to electronic expansion
Valve carries out valve opening operation.
6. a kind of control device for electronic expansion valve characterized by comprising
First unit, for determining target exhaust temperature according to outdoor environment temperature；
Second unit controls the valve opening of electric expansion valve for the difference according to current exhaust gas temperature and target exhaust temperature.
7. device as claimed in claim 6, which is characterized in that the second unit further includes first control unit, for working as
When the difference of front exhaust temperature and target exhaust temperature meets the first difference condition, using 0.618 control methods to electric expansion valve
It carries out closing valve operation.
8. device as claimed in claim 7, which is characterized in that
The second unit further includes the second control unit, is met for the difference when current exhaust gas temperature and target exhaust temperature
When the second difference condition, valve opening operation is carried out to electric expansion valve using 0.618 control methods.
9. a kind of air conditioner, which is characterized in that including the described in any item control device for electronic expansion valve of claim 6 to 8.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that when the computer journey
The control method for electronic expansion valve as described in claim 1 to 5 any one is realized when sequence is executed by processor.
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| CN112161390A (en) * | 2020-09-15 | 2021-01-01 | 珠海格力电器股份有限公司 | Electronic expansion valve control method and device and air conditioner |
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