CN113218114B - Control method of electronic expansion valve - Google Patents
Control method of electronic expansion valve Download PDFInfo
- Publication number
- CN113218114B CN113218114B CN202110623756.1A CN202110623756A CN113218114B CN 113218114 B CN113218114 B CN 113218114B CN 202110623756 A CN202110623756 A CN 202110623756A CN 113218114 B CN113218114 B CN 113218114B
- Authority
- CN
- China
- Prior art keywords
- opening degree
- expansion valve
- electronic expansion
- compressor
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of environmental test equipment, and discloses a control method of an electronic expansion valve, which comprises the following steps: judging whether the compressor is in a standby state, if so, keeping the opening degree of the electronic expansion valve at the minimum value of the opening degree range; if not, the electronic expansion valve acts to adjust the opening degree of the electronic expansion valve; judging the temperature range of the exhaust temperature of the compressor, and judging whether the exhaust temperature of the compressor is in an ascending state or a descending state; and the electronic expansion valve adjusts the opening degree to a preset opening degree according to a certain step length adjusting speed. The control method of the electronic expansion valve can control the exhaust temperature within a reasonable range, ensure the reliable operation of the compressor and the normal operation of the refrigeration system.
Description
Technical Field
The invention relates to the technical field of environmental test equipment, in particular to a control method of an electronic expansion valve.
Background
For the environmental test equipment for testing the battery, the air conditioning systems of the two chambers are the systems sharing one compressor. Under certain specific working conditions, the compression ratio of the compressor is high, the exhaust temperature is high, when the compressor operates at the high exhaust temperature, lubricating oil in the compressor can be carbonized, or a coil in the compressor can be aged due to overheating, so that the compressor fails, and the normal operation of a refrigerating system is influenced.
Disclosure of Invention
The invention aims to provide a control method of an electronic expansion valve, which can control the exhaust temperature in a reasonable range, ensure the reliable operation of a compressor and ensure the normal operation of a refrigerating system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of controlling an electronic expansion valve, comprising: judging whether the compressor is in a standby state, if so, keeping the opening degree of the electronic expansion valve at the minimum value of the opening degree range; if not, the electronic expansion valve acts to adjust the opening degree of the electronic expansion valve; judging the temperature range of the exhaust temperature of the compressor, and judging whether the exhaust temperature of the compressor is in an ascending state or a descending state; and the electronic expansion valve adjusts the opening degree to a preset opening degree according to a certain step length adjusting speed.
As a preferable mode of the control method of the electronic expansion valve, when the state of the compressor is changed from the standby state to the operating state, the electronic expansion valve is operated after a start delay time elapses to adjust the opening degree of the electronic expansion valve.
As a preferable mode of the control method of the electronic expansion valve, when the state of the compressor is in an operation state, if the discharge temperature of the compressor is lower than a deviation under discharge temperature control and is in an increase state, the opening degree of the electronic expansion valve maintains a minimum value of the opening degree range.
As a preferable mode of the control method of the electronic expansion valve, when the state of the compressor is in an operation state, if the discharge temperature of the compressor is lower than the deviation under discharge temperature control and is in a descending state, the opening degree of the electronic expansion valve is kept at the minimum value of the opening degree range.
As a preferable mode of the control method of the electronic expansion valve, when the state of the compressor is in the operating state, if the discharge temperature of the compressor is between the discharge temperature target value and the discharge temperature control lower deviation and in the rising state, the opening degree of the electronic expansion valve is adjusted at the first step adjustment speed until the opening degree of the electronic expansion valve reaches the opening degree transition value and is maintained.
As a preferable mode of the control method of the electronic expansion valve, when the state of the compressor is in the operating state, if the discharge temperature of the compressor is in the descending state between the discharge temperature target value and the deviation under the discharge temperature control, the opening degree of the electronic expansion valve is adjusted at the second step adjustment speed until the opening degree of the electronic expansion valve reaches the minimum value of the opening degree range and is maintained.
As a preferable mode of the control method of the electronic expansion valve, the second step adjustment speed is larger than the first step adjustment speed.
As a preferable mode of the control method of the electronic expansion valve, when the state of the compressor is in the operation state, if the discharge temperature of the compressor is between the discharge temperature target value and the discharge temperature control upper deviation and is in the rising or falling state, the opening degree of the electronic expansion valve is maintained at the opening degree transition value.
As a preferable mode of the control method of the electronic expansion valve, when the state of the compressor is in the operation state, if the discharge temperature of the compressor is higher than the discharge temperature control deviation and is in the rising state, the opening degree of the electronic expansion valve is adjusted at the second step adjustment speed until the opening degree of the electronic expansion valve reaches the maximum value of the opening degree range and is maintained.
As a preferable mode of the control method of the electronic expansion valve, when the state of the compressor is in the operation state, if the discharge temperature of the compressor is higher than the discharge temperature control deviation and is in the descending state, the opening degree of the electronic expansion valve is adjusted at the first step adjustment speed until the opening degree of the electronic expansion valve reaches the opening degree transition value and is maintained.
The invention has the beneficial effects that:
the invention provides a control method of an electronic expansion valve, wherein the opening degree of the electronic expansion valve keeps the minimum value of the opening degree range when a compressor is in a standby state, and the opening degree of the electronic expansion valve is adjusted when the compressor is in an operating state. The control method of the electronic expansion valve can control the exhaust temperature within a reasonable range, ensure the reliable operation of the compressor and the normal operation of a refrigerating system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a flowchart of a control method of an electronic expansion valve in an operating state of a compressor according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the control method of the electronic expansion valve provided by the present invention is further described by the following embodiments with reference to the accompanying drawings.
The present embodiment provides a control method of an electronic expansion valve, including the steps of:
judging whether the compressor is in a standby state, if so, keeping the opening degree of the electronic expansion valve at the minimum value of the opening degree range; if not, the electronic expansion valve acts to adjust the opening of the electronic expansion valve.
That is, when the compressor is in a standby state (the compressor is not running), the control module obtains the signal and outputs the signal to the electronic expansion valve, so that the opening degree of the electronic expansion valve keeps the minimum value of the opening degree range; if the compressor is in the running state, the control module obtains the signal and then outputs the signal to the electronic expansion valve to enable the electronic expansion valve to act, and the opening degree of the electronic expansion valve is adjusted. Preferably, if the state of the compressor is changed from the standby state to the operating state, the electronic expansion valve needs to be actuated after a start delay time elapses to adjust the opening degree of the electronic expansion valve, and the start delay time is set to provide a certain buffering and protecting effect for the air conditioning system.
If the compressor is in the running state, judging the temperature range of the exhaust temperature of the compressor, and judging whether the exhaust temperature of the compressor is in the rising state or the falling state; the electronic expansion valve adjusts the opening degree to a preset opening degree according to a certain step length adjusting speed.
That is, when the state of the compressor is in the operating state, it is determined whether the discharge temperature of the compressor is in the temperature range and whether the discharge temperature is in the rising state or the falling state. And then the electronic expansion valve adjusts the opening degree to a preset opening degree corresponding to the exhaust temperature at a certain step length adjusting speed according to the temperature range of the exhaust temperature and whether the exhaust temperature is in an ascending state or a descending state.
Specifically, as shown in fig. 1, when the state of the compressor is in the operating state, if the discharge temperature of the compressor is lower than the deviation under the discharge temperature control and is in the rising state, the control module controls the opening degree of the electronic expansion valve to continue to maintain the minimum value of the opening degree range.
When the state of the compressor is in an operation state, if the exhaust temperature of the compressor is lower than the deviation under the exhaust temperature control and is in a descending state, the control module controls the opening degree of the electronic expansion valve to continuously keep the minimum value of the opening degree range.
In this embodiment, when the state of the compressor is in the operating state, if the discharge temperature of the compressor is between the discharge temperature target value and the discharge temperature control lower deviation and in the rising state, the control module controls the opening degree of the electronic expansion valve to be adjusted at the first step adjustment speed from the minimum value of the opening degree range until the opening degree of the electronic expansion valve reaches the opening degree transition value and is maintained.
When the state of the compressor is in an operation state, if the exhaust temperature of the compressor is between the target exhaust temperature value and the deviation under the control of the exhaust temperature and is in a descending state, the control module controls the opening degree of the electronic expansion valve to be adjusted according to the second step adjusting speed from the opening degree transition value until the opening degree of the electronic expansion valve reaches the minimum value of the opening degree range and keeps the opening degree. It should be noted that the second step adjustment speed is greater than the first step adjustment speed, that is, the opening degree adjustment speed of the electronic expansion valve when the discharge temperature of the compressor is between the discharge temperature target value and the deviation under discharge temperature control and in the descending state is greater than the opening degree adjustment speed of the electronic expansion valve in the ascending state.
When the state of the compressor is in an operation state, if the exhaust temperature of the compressor is between the exhaust temperature target value and the exhaust temperature control upper deviation and is in an ascending or descending state, the control module controls the opening degree of the electronic expansion valve to be kept at an opening degree transition value.
When the state of the compressor is in the running state, if the exhaust temperature of the compressor is higher than the exhaust temperature control upper deviation and is in the rising state, the control module controls the opening degree of the electronic expansion valve to be adjusted according to the second step adjusting speed until the opening degree of the electronic expansion valve reaches the maximum value of the opening degree range from the opening degree transition value and is maintained.
When the state of the compressor is in an operating state, if the exhaust temperature of the compressor is higher than the exhaust temperature control deviation and is in a descending state, the control module controls the opening degree of the electronic expansion valve to be adjusted according to the first step adjusting speed until the opening degree of the electronic expansion valve reaches an opening degree transition value from the maximum value of the opening degree range and is maintained.
By the method, the exhaust temperature of the compressor can be controlled within a reasonable range, the lubricating oil in the compressor is prevented from being carbonized or the coil in the compressor is prevented from being aged due to overheating, the reliable operation of the compressor is ensured, and the normal operation of a refrigerating system is ensured.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
It is noted that reference throughout this specification to the description of "some embodiments," "other embodiments," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (2)
1. A control method of an electronic expansion valve, comprising:
judging whether the compressor is in a standby state, if so, keeping the opening degree of the electronic expansion valve at the minimum value of the opening degree range; if not, the electronic expansion valve acts to adjust the opening degree of the electronic expansion valve;
judging the temperature range of the exhaust temperature of the compressor, and judging whether the exhaust temperature of the compressor is in an ascending state or a descending state;
the electronic expansion valve adjusts the opening degree to a preset opening degree according to a certain step length adjusting speed, and the method specifically comprises the following steps:
when the state of the compressor is in an operation state, if the exhaust temperature of the compressor is lower than the deviation under the control of the exhaust temperature and is in a rising or falling state, the opening degree of the electronic expansion valve keeps the minimum value of the opening degree range;
when the state of the compressor is in an operation state, if the exhaust temperature of the compressor is between the target exhaust temperature value and the deviation under the exhaust temperature control and is in an ascending state, the opening degree of the electronic expansion valve is adjusted according to a first step adjusting speed until the opening degree of the electronic expansion valve reaches an opening degree transition value and is maintained; if the exhaust temperature of the compressor is between the target exhaust temperature value and the deviation under the control of the exhaust temperature and is in a descending state, the opening degree of the electronic expansion valve is adjusted according to the second step adjusting speed until the opening degree of the electronic expansion valve reaches the minimum value of the opening degree range and is kept; the second step length adjusting speed is greater than the first step length adjusting speed;
when the state of the compressor is in an operation state, if the exhaust temperature of the compressor is between the exhaust temperature target value and the exhaust temperature control upper deviation and is in an ascending or descending state, the opening degree of the electronic expansion valve is kept at an opening degree transition value;
when the state of the compressor is in an operation state, if the exhaust temperature of the compressor is higher than the exhaust temperature control upper deviation and is in an ascending state, the opening degree of the electronic expansion valve is adjusted according to a second step adjusting speed until the opening degree of the electronic expansion valve reaches the maximum value of the opening degree range and is maintained; and if the exhaust temperature of the compressor is higher than the exhaust temperature control upper deviation and is in a descending state, adjusting the opening degree of the electronic expansion valve according to a first step length adjusting speed until the opening degree of the electronic expansion valve reaches an opening degree transition value and keeping the opening degree.
2. The control method of an electronic expansion valve according to claim 1, wherein if the state of the compressor is changed from a standby state to an operating state, the electronic expansion valve is actuated after a start-up delay time elapses to adjust the opening degree of the electronic expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110623756.1A CN113218114B (en) | 2021-06-04 | 2021-06-04 | Control method of electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110623756.1A CN113218114B (en) | 2021-06-04 | 2021-06-04 | Control method of electronic expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113218114A CN113218114A (en) | 2021-08-06 |
| CN113218114B true CN113218114B (en) | 2022-03-15 |
Family
ID=77082774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110623756.1A Active CN113218114B (en) | 2021-06-04 | 2021-06-04 | Control method of electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113218114B (en) |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3531709B2 (en) * | 1997-02-28 | 2004-05-31 | 株式会社富士通ゼネラル | Control method of air conditioner |
| JP3890713B2 (en) * | 1997-11-27 | 2007-03-07 | 株式会社デンソー | Refrigeration cycle equipment |
| JP2003240311A (en) * | 2002-02-12 | 2003-08-27 | Fujitsu General Ltd | Control method for air conditioner |
| KR20080059907A (en) * | 2006-12-26 | 2008-07-01 | 엘지전자 주식회사 | Control process of multi-type air conditioner |
| CN106196764B (en) * | 2016-07-19 | 2019-05-14 | 青岛海信日立空调系统有限公司 | A kind of control method and device of electric expansion valve |
| CN106568244B (en) * | 2016-11-09 | 2019-02-12 | 重庆美的通用制冷设备有限公司 | A kind of electric expansion valve pretravel control method, system and electrical equipment |
| CN106871476B (en) * | 2017-02-17 | 2019-08-16 | 珠海格力电器股份有限公司 | Air source heat pump unit and control method and device of electronic expansion valve thereof |
| CN109425069B (en) * | 2017-08-17 | 2021-06-04 | 宁波奥克斯电气股份有限公司 | Control method for electronic expansion valve during heating |
| CN109405379B (en) * | 2017-08-17 | 2021-06-04 | 宁波奥克斯电气股份有限公司 | Control method for refrigeration electronic expansion valve |
| CN107606830B (en) * | 2017-09-05 | 2020-05-12 | 浙江正理生能科技有限公司 | Electronic expansion valve adjusting method |
| KR102008928B1 (en) * | 2017-09-27 | 2019-08-08 | 엘지전자 주식회사 | A method for controlling an air conditioner |
| CN107940827B (en) * | 2017-11-10 | 2020-04-10 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and refrigerant distribution control method and device thereof |
| CN109028485A (en) * | 2018-06-12 | 2018-12-18 | 广东美的暖通设备有限公司 | Control method, system and the air-conditioning of air-conditioning system |
| CN110388769B (en) * | 2019-07-10 | 2021-09-21 | 郑州海尔空调器有限公司 | Control method and control system of electronic expansion valve |
| CN111692736B (en) * | 2020-06-04 | 2021-11-19 | 广东美的制冷设备有限公司 | Control method of electronic expansion valve and air conditioning system |
| CN112178978B (en) * | 2020-10-15 | 2022-04-12 | 广东纽恩泰新能源科技发展有限公司 | Protection control method for overhigh exhaust temperature of variable frequency heat pump |
| CN113154725A (en) * | 2021-05-27 | 2021-07-23 | 江苏拓米洛环境试验设备有限公司 | Control method of multi-chamber electronic expansion valve of refrigeration system and refrigeration system |
| CN113587338B (en) * | 2021-06-28 | 2022-11-29 | 宁波奥克斯电气股份有限公司 | Compressor exhaust temperature control method and device and air conditioner |
-
2021
- 2021-06-04 CN CN202110623756.1A patent/CN113218114B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113218114A (en) | 2021-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111692736B (en) | Control method of electronic expansion valve and air conditioning system | |
| US6568197B2 (en) | Refrigerating unit | |
| CN103486689B (en) | The control method of air-conditioner and device | |
| CN109282422B (en) | Air conditioning system, control method thereof and air conditioner | |
| EP1862745B1 (en) | Air conditioner | |
| US20140188313A1 (en) | Adaptive control method for air conditioning system of an electric car | |
| CN102410701B (en) | Compartment temperature control method of refrigerator | |
| WO2018223759A1 (en) | Method for controlling air-conditioner air cooling unit and air-conditioner | |
| CN106091271B (en) | Air conditioner abnormal sound removing method and device | |
| CN107860103A (en) | The control method of multiple on-line system, device and there is its system | |
| CN201526483U (en) | Variable speed control system for condensate fan | |
| CN108344213B (en) | Valve adjusting method and valve adjusting device for optimal opening degree of electronic expansion valve | |
| EP1552156B1 (en) | Speed control for compressors | |
| KR101317541B1 (en) | Two-stage compression refrigerating device | |
| CN109882988B (en) | Control method and device for preventing air conditioner refrigerant migration and air conditioner | |
| CN101749827A (en) | Environmental control system and method | |
| CN103925755A (en) | Operation control method for condensation side fan unit of refrigerating system | |
| CN104842739A (en) | Vehicle control system, vehicle and control method | |
| CN107726568B (en) | Control method and system of air conditioner and air conditioner | |
| CN105444419B (en) | Method and device for controlling frequency of compressor of air energy water heater | |
| CN113218114B (en) | Control method of electronic expansion valve | |
| JPH0343848Y2 (en) | ||
| CN111750506A (en) | Control system and control method of condensing fan | |
| CN111981719B (en) | Refrigerating unit compression refrigeration cycle control method and device and refrigerating unit | |
| CN110500685A (en) | Air conditioning system and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 215300 plants A6, a7, a8 and B10, No. 8, Huacheng Road, Lujia Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Jiangsu Tuomiluo High-end Equipment Co.,Ltd. Address before: 215000 room 7, No.427 Sanxiang Road, Kunshan Development Zone, Suzhou City, Jiangsu Province Patentee before: JIANGSU TOLIMO ENVIRONMENT TESTING EQUIPMENT Co.,Ltd. |
|
| CP03 | Change of name, title or address |