CN105276883A - Control method and control device of electronic expansion valve and air conditioning system - Google Patents
Control method and control device of electronic expansion valve and air conditioning system Download PDFInfo
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- CN105276883A CN105276883A CN201510741501.XA CN201510741501A CN105276883A CN 105276883 A CN105276883 A CN 105276883A CN 201510741501 A CN201510741501 A CN 201510741501A CN 105276883 A CN105276883 A CN 105276883A
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Abstract
The invention relates to the technical field of refrigerating equipment, in particular to a control method and a control device of an electronic expansion valve and an air conditioning system. The control method of the electronic expansion valve comprises setting of an all-working-condition operation state database of an air conditioning unit, wherein the all-working-condition operation state database comprises operation parameters, obtained through experiments, of the unit under various working conditions, and electronic expansion valve openness corresponding to each operation parameter; actual operation parameters of the unit in the unit operation process are detected; the operation parameters corresponding to the actual operation parameters in the database are searched in the database; the electronic expansion valve openness corresponding to the searched operation parameters is selected according to the searched operation parameters; and then, the electronic expansion valve is adjusted according to the selected electronic expansion valve openness. Meanwhile, the invention further provides a control device of the electronic expansion valve adopting the control method, and an air conditioning system adopting the control device. The control method, provided by the invention, improves the control precision of the electronic expansion valve, and improves the unit working efficiency.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, particularly relate to a kind of control method for electronic expansion valve, control device and air-conditioning system.
Background technology
In the running of air-conditioning system, cold medium flux has larger mobility scale according to payload, and traditional throttle part is if capillary, heating power expansion valve etc. are because adjustable range is narrow or not accurately can not ensure the stable operation of system, and electric expansion valve because its flow adjustment range is large, actuation techniques is ripe, control to become flexibly the throttle part that air-conditioning system generally adopts.
Electric expansion valve, as one of compressed steam circulatory system important composition parts, serves the effect of throttling and adjustment liquid supply rate.Vital effect is played to the unit performance of the compressed steam circulatory system, although electric expansion valve has fine flexibility, but the control of existing electric expansion valve with discharge superheat and suction superheat for master control signal, pid algorithm is used to realize the electronic expansion valve controls of unit, this control has narrow range, in the problem that the little control accuracy of adjustable extent internal variable is not high enough due to control signal.
For the problems referred to above, we need a kind of control method for electronic expansion valve, control device and the air-conditioning system that can solve the problem of the degree of regulation difference to electric expansion valve existed in prior art.
Summary of the invention
The object of the invention is to propose a kind of control method for electronic expansion valve, the problem of the degree of regulation difference to electric expansion valve existed in prior art can be solved.
Another object of the present invention is to propose a kind of control device for electronic expansion valve, and it adopts the course of work of control method for electronic expansion valve as previously discussed to electric expansion valve to control.
Another object of the present invention is to propose a kind of air-conditioning system, and it adopts control device for electronic expansion valve as previously discussed.
For reaching this object, the present invention by the following technical solutions:
A kind of control method for electronic expansion valve, it comprises the following steps:
Steps A: air-conditioner set full working scope health data storehouse is set, this full working scope health data storehouse comprises the operational factor of unit under each operating mode obtained by many experiments, and the electronic expansion valve opening that each operational factor is corresponding;
Step B: the actual operation parameters of unit in unit running process is detected;
Step C: by searching database, search the operational factor corresponding in a database with actual operation parameters, choose and the electronic expansion valve opening corresponding to it according to the operational factor checked in, then according to the electronic expansion valve opening adjustment electric expansion valve chosen.
As a kind of preferred version of above-mentioned control method for electronic expansion valve, in step, the operational factor of unit comprises, two or more combination in chilled water temperature, cooling water temperature, evaporating pressure, condensing pressure, suction temperature, delivery temperature, compressor circuit, discharge superheat and suction superheat.
As a kind of preferred version of above-mentioned control method for electronic expansion valve, each operational factor has a value all accordingly under different operating conditions, and all values of same operational factor are a continuous print numerical intervals.
As a kind of preferred version of above-mentioned control method for electronic expansion valve, described value is point value.
As a kind of preferred version of above-mentioned control method for electronic expansion valve, when operational factor is multiple, the different values that the different values of each operational factor are all run from other carry out combination formation one group of data group, the corresponding electronic expansion valve opening of this data group.
As a kind of preferred version of above-mentioned control method for electronic expansion valve, in step C, corresponding operational factor refers to operational factor that is identical with actual operation parameters or that close on.
A kind of control device for electronic expansion valve, it adopts control method for electronic expansion valve as previously discussed to control the aperture of electric expansion valve.
As a kind of preferred version of above-mentioned control device for electronic expansion valve, comprise control unit, memory cell and detecting unit;
Be provided with air-conditioner set full working scope health data storehouse in described memory cell, this full working scope health data storehouse comprises the operational factor of unit under each operating mode obtained by many experiments, and the electronic expansion valve opening that each operational factor is corresponding;
Described detecting unit is for detecting the actual operation parameters of unit in unit running process;
The unit actual operation parameters detected is passed to control unit by described detecting unit, described control unit searches the operational factor corresponding in a database with actual operation parameters according to the actual operation parameters received in data, choose and the electronic expansion valve opening corresponding to it according to the operational factor checked in, then according to the electronic expansion valve opening adjustment electric expansion valve chosen.
As a kind of preferred version of above-mentioned control device for electronic expansion valve, described detecting unit comprises temperature sensor for detecting unit operation situation and/or pressure sensor.
A kind of air-conditioning system, it comprises control device for electronic expansion valve as previously discussed.
Beneficial effect of the present invention is: the application is by comparing the aperture determining electric expansion valve by the parameter in unit actual operation parameters and database, thus, improve the control accuracy of electric expansion valve, and then can run under the operating mode of optimum by unit, improve the operating efficiency of unit.
Accompanying drawing explanation
Fig. 1 is the control flow chart of the electric expansion valve that the specific embodiment of the invention provides.
Detailed description of the invention
Technical scheme of the present invention is further illustrated by detailed description of the invention below in conjunction with accompanying drawing.
As shown in Figure 1, present embodiments provide for a kind of control method for electronic expansion valve, it comprises the following steps:
Steps A: air-conditioner set full working scope health data storehouse is set, this full working scope health data storehouse comprises the operational factor of unit under each operating mode obtained by many experiments, and the electronic expansion valve opening that each operational factor is corresponding;
Step B: the actual operation parameters of unit in unit running process is detected;
Step C: by searching database, search the operational factor corresponding in a database with actual operation parameters, choose and the electronic expansion valve opening corresponding to it according to the operational factor checked in, then according to the electronic expansion valve opening adjustment electric expansion valve chosen.
In steps A: the operational factor of unit under each operating mode, and electronic expansion valve opening corresponding to each operational factor is the best aperture obtained by test of many times.
In step, the operational factor of unit comprises, two or more combination in chilled water temperature, cooling water temperature, evaporating pressure, condensing pressure, suction temperature, delivery temperature, compressor circuit, discharge superheat and suction superheat.
The quantity that operational factor comprises is more, judges that the electronic expansion valve opening obtained is more accurate by it.As preferably, when unit is the anxious unit of Water cooled air conditioners, the operational factor of unit comprises chilled water temperature, cooling water temperature, evaporating pressure, condensing pressure, suction temperature, delivery temperature, compressor circuit, discharge superheat and suction superheat.
The concrete value mode of above-mentioned database is:
Each operational factor has a value all accordingly under different operating conditions, and all values of same operational factor are a continuous print numerical intervals, and above-mentioned value is point value.It should be noted that, the preferred version of above-mentioned value to be point value be the application, certain above-mentioned value also can be an interval.
Continuous print numerical intervals described herein refers to: each numerical value is arranged with the form of Geometric Sequence, and the temperature of temperature under each operating mode as chilled water is: 7 DEG C, 8 DEG C, 9 DEG C, 10 DEG C, 11 DEG C, 12 DEG C.The situation of what this concrete embodiment was chosen is integer, the value of certain each parameter also can be decimal.
When operational factor is multiple, the different values that the different values of each operational factor are all run from other carry out combination formation one group of data group, often organize all corresponding electronic expansion valve opening of data group.
By the combined situation between above-mentioned data, can detect that operational factor comprehensively covers to actual, that is often group detects actual operation parameters, all can find operational factor corresponding thereto in a database.
Present embodiment, comprises chilled water temperature with the operational factor of unit, and condensate temperature, evaporating pressure are that the row permutation and combination form concrete to above-mentioned data is described in detail, as described below concrete:
The value of chilled water is: A1, A2; The value of the temperature of condensed water is B1, B2; Evaporating pressure is: C1, C2;
Following data group can be formed: A by above-mentioned data
1, B
1, C
1; A
1, B
1, C
2; A
1, B
2, C
1; A
1, B
2, C
2; A
2, B
1, C
1; A
2, B
1, C
2; A
2, B
2, C
1; A
2, B
2, C
2; The aperture of the electric expansion valve that above-mentioned each group of data are corresponding is respectively respectively: Q
1, Q
2, Q
3, Q
4, Q
5, Q
6, Q
7, Q
8.
Mode by experiment makes in the process of data, mode by experiment chooses continuous print point value, and the arrangement between different pieces of information, can detect that operational factor comprehensively covers to actual, that is often group detects actual operation parameters, all can find operational factor corresponding thereto in a database.Which thereby enhance the accuracy of electric expansion valve adjustment.
In step C, corresponding operational factor refers to operational factor that is identical with actual operation parameters or that close on.If the operational factor of closing on described herein refers to and does not find the operational factor completely corresponding with actual operation parameters in a database, so chooses the operational factor minimum with actual operation parameters difference.
In the present embodiment, additionally provide a kind of control device for electronic expansion valve, it adopts control method for electronic expansion valve as previously discussed to control the aperture of electric expansion valve.
Above-mentioned control device for electronic expansion valve comprises control unit, memory cell and detecting unit.
Be provided with air-conditioner set full working scope health data storehouse in memory cell, this full working scope health data storehouse comprises the operational factor of unit under each operating mode obtained by many experiments, and the electronic expansion valve opening that each operational factor is corresponding.
Detecting unit is for detecting the actual operation parameters of unit in unit running process.
The unit actual operation parameters detected is passed to control unit by detecting unit, control unit searches the operational factor corresponding in a database with actual operation parameters according to the actual operation parameters received in data, choose and the electronic expansion valve opening corresponding to it according to the operational factor checked in, then according to the electronic expansion valve opening adjustment electric expansion valve chosen.
Concrete, detecting unit comprises temperature sensor for detecting unit operation situation and/or pressure sensor.
In the present embodiment, additionally provide a kind of air-conditioning system, it comprises control device for electronic expansion valve as previously discussed.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (10)
1. a control method for electronic expansion valve, is characterized in that, comprises the following steps:
Steps A: air-conditioner set full working scope health data storehouse is set, this full working scope health data storehouse comprises the operational factor of unit under each operating mode obtained by many experiments, and the electronic expansion valve opening that each operational factor is corresponding;
Step B: the actual operation parameters of unit in unit running process is detected;
Step C: by searching database, search the operational factor corresponding in a database with actual operation parameters, choose and the electronic expansion valve opening corresponding to it according to the operational factor checked in, then according to the electronic expansion valve opening adjustment electric expansion valve chosen.
2. control method for electronic expansion valve according to claim 1, it is characterized in that, in step, the operational factor of unit comprises, two or more combination in chilled water temperature, cooling water temperature, evaporating pressure, condensing pressure, suction temperature, delivery temperature, compressor circuit, discharge superheat and suction superheat.
3. control method for electronic expansion valve according to claim 2, is characterized in that, each operational factor has a value all accordingly under different operating conditions, and all values of same operational factor are a continuous print numerical intervals.
4. control method for electronic expansion valve according to claim 3, is characterized in that, described value is point value.
5. control method for electronic expansion valve according to claim 3, it is characterized in that, when operational factor is multiple, the different values that the different values of each operational factor are all run from other carry out combination formation one group of data group, the corresponding electronic expansion valve opening of this data group.
6. control method for electronic expansion valve according to claim 1, is characterized in that, in step C, corresponding operational factor refers to operational factor that is identical with actual operation parameters or that close on.
7. a control device for electronic expansion valve, is characterized in that, adopts the control method for electronic expansion valve as described in claim 1-6 any one to control the aperture of electric expansion valve.
8. control device for electronic expansion valve according to claim 7, is characterized in that, comprises control unit, memory cell and detecting unit;
Be provided with air-conditioner set full working scope health data storehouse in described memory cell, this full working scope health data storehouse comprises the operational factor of unit under each operating mode obtained by many experiments, and the electronic expansion valve opening that each operational factor is corresponding;
Described detecting unit is for detecting the actual operation parameters of unit in unit running process;
The unit actual operation parameters detected is passed to control unit by described detecting unit, described control unit searches the operational factor corresponding in a database with actual operation parameters according to the actual operation parameters received in data, choose and the electronic expansion valve opening corresponding to it according to the operational factor checked in, then according to the electronic expansion valve opening adjustment electric expansion valve chosen.
9. control device for electronic expansion valve according to claim 8, is characterized in that, described detecting unit comprises temperature sensor for detecting unit operation situation and/or pressure sensor.
10. an air-conditioning system, is characterized in that, comprises the control device for electronic expansion valve as described in claim 7-9 any one.
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| CN201510741501.XA CN105276883B (en) | 2015-11-02 | 2015-11-02 | A kind of control method for electronic expansion valve, control device and air-conditioning system |
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|---|---|---|---|
| CN201510741501.XA CN105276883B (en) | 2015-11-02 | 2015-11-02 | A kind of control method for electronic expansion valve, control device and air-conditioning system |
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| CN105276883A true CN105276883A (en) | 2016-01-27 |
| CN105276883B CN105276883B (en) | 2018-06-01 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322870A (en) * | 2016-11-14 | 2017-01-11 | 广东美的暖通设备有限公司 | Control method and device for electronic expansion valve and air conditioner heat pump system |
| CN106895623A (en) * | 2017-02-28 | 2017-06-27 | 青岛海尔空调器有限总公司 | Air-conditioner and its delivery temperature control method |
| CN107289594A (en) * | 2017-07-24 | 2017-10-24 | 珠海格力电器股份有限公司 | Air-conditioner set, airconditioning control network and air conditioning control method |
| CN107655174A (en) * | 2017-10-26 | 2018-02-02 | 重庆美的通用制冷设备有限公司 | The anti-step-out control method and control device of air-conditioning system and its electric expansion valve |
| CN107933872A (en) * | 2017-11-07 | 2018-04-20 | 珠海格力电器股份有限公司 | The control method for electronic expansion valve and device of warship marine cooling-water unit |
| CN108317782A (en) * | 2018-02-08 | 2018-07-24 | 广东高而美制冷设备有限公司 | A kind of the tune valve method and tune valve gear of frequency conversion system memory valve body aperture |
| CN109086447A (en) * | 2018-08-20 | 2018-12-25 | 珠海格力电器股份有限公司 | Energy consumption detecting method, device, computer equipment and the storage medium of heat-pump apparatus |
| 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 |
| CN109974239A (en) * | 2019-04-08 | 2019-07-05 | 珠海格力电器股份有限公司 | Multi-joint unit operating condition setting method, device, computer equipment and storage medium |
| CN110360728A (en) * | 2019-08-05 | 2019-10-22 | 珠海格力电器股份有限公司 | Flow rate adjusting method, medium, device, equipment and air-conditioning |
| CN111322801A (en) * | 2020-02-27 | 2020-06-23 | 广东志高暖通设备股份有限公司 | Control method and device of electronic expansion valve |
| CN111623569A (en) * | 2020-06-02 | 2020-09-04 | 江苏拓米洛环境试验设备有限公司 | Temperature control device and method of temperature control equipment |
| CN112082293A (en) * | 2020-09-09 | 2020-12-15 | 珠海格力电器股份有限公司 | Throttle valve control method and device, compressed steam circulation system and air conditioner |
| CN112413937A (en) * | 2020-11-23 | 2021-02-26 | 珠海格力电器股份有限公司 | Water chilling unit and electronic expansion valve control method, device and system thereof |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322870B (en) * | 2016-11-14 | 2019-04-05 | 广东美的暖通设备有限公司 | The control method and control device of electric expansion valve, air conditioner heat pump system |
| CN106322870A (en) * | 2016-11-14 | 2017-01-11 | 广东美的暖通设备有限公司 | Control method and device for electronic expansion valve and air conditioner heat pump system |
| CN106895623B (en) * | 2017-02-28 | 2020-05-29 | 青岛海尔空调器有限总公司 | Exhaust temperature control method of air conditioner |
| CN106895623A (en) * | 2017-02-28 | 2017-06-27 | 青岛海尔空调器有限总公司 | Air-conditioner and its delivery temperature control method |
| CN107289594A (en) * | 2017-07-24 | 2017-10-24 | 珠海格力电器股份有限公司 | Air-conditioner set, airconditioning control network and air conditioning control method |
| CN107655174B (en) * | 2017-10-26 | 2020-05-08 | 重庆美的通用制冷设备有限公司 | Air conditioning system and anti-desynchronization control method and device for electronic expansion valve of air conditioning system |
| CN107655174A (en) * | 2017-10-26 | 2018-02-02 | 重庆美的通用制冷设备有限公司 | The anti-step-out control method and control device of air-conditioning system and its electric expansion valve |
| CN107933872A (en) * | 2017-11-07 | 2018-04-20 | 珠海格力电器股份有限公司 | The control method for electronic expansion valve and device of warship marine cooling-water unit |
| CN108317782A (en) * | 2018-02-08 | 2018-07-24 | 广东高而美制冷设备有限公司 | A kind of the tune valve method and tune valve gear of frequency conversion system memory valve body aperture |
| CN109086447A (en) * | 2018-08-20 | 2018-12-25 | 珠海格力电器股份有限公司 | Energy consumption detecting method, device, computer equipment and the storage medium of heat-pump apparatus |
| 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 |
| CN109974239A (en) * | 2019-04-08 | 2019-07-05 | 珠海格力电器股份有限公司 | Multi-joint unit operating condition setting method, device, computer equipment and storage medium |
| CN110360728A (en) * | 2019-08-05 | 2019-10-22 | 珠海格力电器股份有限公司 | Flow rate adjusting method, medium, device, equipment and air-conditioning |
| CN111322801A (en) * | 2020-02-27 | 2020-06-23 | 广东志高暖通设备股份有限公司 | Control method and device of electronic expansion valve |
| CN111322801B (en) * | 2020-02-27 | 2021-05-11 | 广东志高暖通设备股份有限公司 | Control method and device of electronic expansion valve |
| CN111623569A (en) * | 2020-06-02 | 2020-09-04 | 江苏拓米洛环境试验设备有限公司 | Temperature control device and method of temperature control equipment |
| CN112082293A (en) * | 2020-09-09 | 2020-12-15 | 珠海格力电器股份有限公司 | Throttle valve control method and device, compressed steam circulation system and air conditioner |
| CN112413937A (en) * | 2020-11-23 | 2021-02-26 | 珠海格力电器股份有限公司 | Water chilling unit and electronic expansion valve control method, device and system thereof |
| CN112413937B (en) * | 2020-11-23 | 2022-05-31 | 珠海格力电器股份有限公司 | Water chilling unit and electronic expansion valve control method, device and system thereof |
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