CN112880248A - Electronic expansion valve control method, device and controller - Google Patents
Electronic expansion valve control method, device and controller Download PDFInfo
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- CN112880248A CN112880248A CN202110241321.0A CN202110241321A CN112880248A CN 112880248 A CN112880248 A CN 112880248A CN 202110241321 A CN202110241321 A CN 202110241321A CN 112880248 A CN112880248 A CN 112880248A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims abstract description 48
- 239000000523 sample Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention belongs to the technical field of refrigeration, and particularly discloses a method, a device and a controller for controlling an electronic expansion valve. The control method of the electronic expansion valve comprises the following steps: the controller is powered on to operate; carrying out program initialization and resetting of the electronic expansion valve; collecting the temperature of a refrigeration house or a display cabinet, the temperature of an intermediate coil of an evaporator and the temperature of an outlet coil of the evaporator; and controlling the step number of the electronic expansion valve according to the change of the collected temperature.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a method and a device for controlling an electronic expansion valve and a controller.
Background
Along with the development of the Chinese economic level, the requirements on food safety and cold chain transportation are higher and higher, the matched refrigeration houses or refrigeration and refrigeration display cabinets are more and more, the refrigeration system still adopts a method of a solenoid valve and a thermostatic expansion valve to control the temperature of the refrigeration houses or the display cabinets under most conditions, and the thermostatic expansion valve adopted in the refrigeration and refrigeration at present has the problem that the control precision of the liquid supply amount of a refrigerant is not enough, so that the problems of unstable liquid supply and excessive liquid supply and easy frosting when the evaporation temperature is low are caused.
The few refrigeration systems are controlled by electronic expansion valves, but usually a low-pressure sensor is required to be arranged, and the control technology of the electronic expansion valves is mastered in some well-known enterprises abroad, so the application cost of the refrigeration systems is high. If the low-pressure sensor is not additionally arranged and the 2 coil pipe temperature probes are used for replacing, the electronic expansion valve is controlled in a misadjustment mode in the running process, the misoperation of the electronic expansion valve is caused, the whole refrigeration effect is influenced, and even a refrigeration system is damaged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method, a device and a controller for controlling an electronic expansion valve, wherein the electronic expansion valve is accurately controlled according to the refrigeration requirement by adopting three temperature probes through analog calculation under the condition of not additionally arranging a low-voltage sensor.
In order to solve the technical problems, the technical scheme of the invention is as follows: a control method of an electronic expansion valve comprises the following steps:
s10: the controller is powered on to operate;
s20: initializing a program, and resetting the electronic expansion valve;
s30: collecting the temperature of a refrigeration house or a display cabinet;
s40: judging whether the opening condition of the electronic expansion valve is met or not according to the temperature of the refrigeration house or the display cabinet, if so, controlling the electronic expansion valve to be opened to the initial step number for t1 time;
s50: judging whether the time of the initial step number t1 is enough, if yes, entering a step S60, and if not, waiting for the time of the initial step number t 1;
s60: collecting the temperature of the refrigeration house or the display cabinet, the temperature of the middle coil of the evaporator and the temperature of the outlet coil of the evaporator according to periods, calculating the change steps of the electronic expansion valve, and adjusting the electronic expansion valve according to the change steps;
s70: judging whether the closing condition of the electronic expansion valve is met according to the temperature of the refrigeration house or the showcase, if so, entering step S80, otherwise, returning to step S60;
s80: and closing the electronic expansion valve, collecting the temperature of the refrigeration house or the display cabinet, and waiting for the temperature of the refrigeration house or the display cabinet to meet the opening condition of the electronic expansion valve.
Optionally, step S40 further includes: if the electronic expansion valve opening condition is not satisfied, the process proceeds to step S80.
Optionally, the opening condition of the electronic expansion valve is as follows: t1 ℃ is more than TS +. DELTA.T 1, wherein T1 ℃ is the temperature of the cold storage or the showcase, TS is the set value of the storage temperature, and DELTA.T 1 is the deviation of the storage temperature.
Optionally, the closing condition of the electronic expansion valve is as follows: t1 ℃ < TS-. DELTA.T 1.
Optionally, calculating the number of change steps of the electronic expansion valve includes: Δ B ═ K Δ T2-P Δ T3, where: the delta B is the number of the changing steps, K, P is a preset parameter, the delta T2 is the difference value between the temperature of the coil at the outlet of the evaporator and the temperature of the coil at the middle part of the evaporator, and the delta T3 is the difference value delta T3 between the temperature of the cold storage or the display cabinet and the coil at the outlet of the evaporator.
The invention also provides an electronic expansion valve control device, which comprises a sensor module, a data acquisition module, an MCU processor, an electronic expansion valve execution module and a controller;
the sensor module comprises three temperature sensors, the three temperature sensors are respectively used for acquiring the temperature of the refrigeration house or the display cabinet, the temperature of the middle coil of the evaporator and the temperature signal of the outlet coil of the evaporator and sending the signals to the controller, the data acquisition module is used for acquiring the running parameters of the cold air blower in the refrigeration house and sending the parameters to the controller, the MCU processor is used for calculating and processing according to the command of the controller, and the electronic expansion valve execution module is connected with the controller and used for executing the electronic expansion valve.
The invention also provides a controller for any one electronic expansion valve control method.
By adopting the technical scheme, the temperature of the refrigeration house or the display cabinet, the temperature of the middle coil of the evaporator and the temperature of the outlet coil of the evaporator are acquired through the three temperature probes, and the running steps of the electronic expansion valve are accurately controlled under the condition that too much cost is not increased, so that the stability of the running temperature of the refrigeration house is improved, the frosting probability of the refrigeration house is reduced, and the whole running efficiency and the equipment reliability of the refrigeration house are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 these drawings without creative efforts.
FIG. 1 is a schematic diagram of the steps of the control method of the electronic expansion valve of the present invention;
FIG. 2 is a block schematic diagram of an electronic expansion valve control apparatus of the present invention;
fig. 3 is a schematic view of an installation structure of the electronic expansion valve control apparatus of the present invention.
In the figure, 100-controller, 200-sensor module, 210, 220, 230-temperature sensor, 300-data acquisition module, 400-electronic expansion valve execution module, 500-MCU processor, 600-electronic expansion valve, 700-evaporator.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "thickness", "up-down, front-back, left-right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be taken as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a defined feature of "first", "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. It should be noted that unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed or removable connections or integral connections; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media profiles, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
In one embodiment of the present invention, as shown in fig. 1-3, there is provided an electronic expansion valve control method comprising the steps of:
s10: the controller is powered on to run.
S20: and initializing a program, and resetting the electronic expansion valve to ensure that the electronic expansion valve does not have position drift and ensure the accuracy of the subsequent steps of the electronic expansion valve.
S30: the temperature of the refrigeration house or the display cabinet is collected.
S40: and judging whether the opening condition of the electronic expansion valve is met or not according to the temperature of the refrigeration house or the display cabinet, if so, controlling the electronic expansion valve to be opened to the initial step number, lasting for t1 time, defaulting to 180S at t1, adjusting according to the actual condition, and if not, directly entering the step S80.
Specifically, the opening conditions of the electronic expansion valve are as follows:
t1 ℃ is more than TS +. DELTA.T 1, wherein T1 ℃ is the temperature of the refrigeration house or the showcase, TS is the set value of the storage temperature, DELTA.T 1 is the deviation of the storage temperature, and the deviation of the set value of the storage temperature and the storage temperature can be set according to specific conditions.
S50: and judging whether the time is enough to the initial step number t1, if so, entering the step S60, and if not, waiting for the time which is enough to the initial step number t 1.
S60: the temperature of the refrigeration house or the display cabinet, the temperature of the middle coil of the evaporator and the temperature of the outlet coil of the evaporator are collected according to the period, the change step number of the electronic expansion valve is calculated, and the electronic expansion valve is adjusted according to the change step number.
Specifically, each period is t2 (default is 40s, which can be adjusted according to actual conditions). The temperature of the refrigeration house or the display cabinet, the temperature of the middle coil of the evaporator and the temperature of the outlet coil of the evaporator are detected in each period, the difference value delta T2 between the temperature of the outlet coil of the evaporator and the temperature of the middle coil of the evaporator is calculated, meanwhile, the difference value delta T3 between the temperature of the refrigeration house and the temperature of the outlet coil of the evaporator is calculated, and the change step number delta B of the electronic expansion valve is calculated and adjusted through the two difference values, so that the electronic expansion valve is accurately controlled.
Specifically, calculating the number of change steps of the electronic expansion valve includes:
Δ B ═ K Δ T2-P Δ T3, where: the delta B is the number of the changing steps, K, P is a preset parameter, the delta T2 is the difference value between the temperature of the coil at the outlet of the evaporator and the temperature of the coil at the middle part of the evaporator, and the delta T3 is the difference value delta T3 between the temperature of the cold storage or the display cabinet and the coil at the outlet of the evaporator.
S70: and judging whether the closing condition of the electronic expansion valve is met or not according to the temperature of the refrigeration house or the showcase, if so, going to step S80, and if not, going back to step S60.
Specifically, the closing condition of the electronic expansion valve is as follows:
T1℃<TS-△T1。
s80: and closing the electronic expansion valve, collecting the temperature of the refrigeration house or the display cabinet, and waiting for the temperature of the refrigeration house or the display cabinet to meet the opening condition of the electronic expansion valve.
The invention also provides an electronic expansion valve control device, which comprises a sensor module 200, a data acquisition module 300, an MCU processor 500, an electronic expansion valve execution module 400 and a controller 100;
the sensor module 200 comprises three temperature sensors 210, 220, 230, the three temperature sensors 210, 220, 230 are respectively used for acquiring the temperature of the refrigeration house or the display cabinet, the temperature of the middle coil of the evaporator 700, and the temperature signal of the outlet coil of the evaporator 700 and sending the signals to the controller 100, the data acquisition module 300 is used for acquiring the operation parameters (such as temperature, humidity, pressure value, etc.) of the cold blower in the refrigeration house and sending the parameters to the controller 100, the MCU processor 500 is used for calculating and processing according to the command of the controller 100, and the electronic expansion valve execution module 400 is connected with the controller 100 and used for executing the electronic expansion valve 600.
The present embodiment further provides a controller 100, configured to execute the method for controlling an electronic expansion valve according to any of the foregoing embodiments.
According to the electronic expansion valve control method, the temperature of the refrigeration house or the display cabinet, the temperature of the middle coil of the evaporator 700 and the temperature of the outlet coil of the evaporator 700 are acquired through the three temperature probes (namely the temperature sensors), and the operation steps of the electronic expansion valve are accurately controlled under the condition that the cost is not increased too much, so that the stability of the operation temperature of the refrigeration house is improved, the frosting probability of the refrigeration house is reduced, and the overall operation efficiency and the equipment reliability of the refrigeration house are improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (7)
1. A control method of an electronic expansion valve is characterized by comprising the following steps:
s10: the controller is powered on to operate;
s20: initializing a program, and resetting the electronic expansion valve;
s30: collecting the temperature of a refrigeration house or a display cabinet;
s40: judging whether the opening condition of the electronic expansion valve is met or not according to the temperature of the refrigeration house or the display cabinet, if so, controlling the electronic expansion valve to be opened to the initial step number for t1 time;
s50: judging whether the time of the initial step number t1 is enough, if yes, entering a step S60, and if not, waiting for the time of the initial step number t 1;
s60: collecting the temperature of the refrigeration house or the display cabinet, the temperature of the middle coil of the evaporator and the temperature of the outlet coil of the evaporator according to periods, calculating the change steps of the electronic expansion valve, and adjusting the electronic expansion valve according to the change steps;
s70: judging whether the closing condition of the electronic expansion valve is met according to the temperature of the refrigeration house or the showcase, if so, entering step S80, otherwise, returning to step S60;
s80: and closing the electronic expansion valve, collecting the temperature of the refrigeration house or the display cabinet, and waiting for the temperature of the refrigeration house or the display cabinet to meet the opening condition of the electronic expansion valve.
2. The electronic expansion valve control method according to claim 1, wherein step S40 further comprises:
if the electronic expansion valve opening condition is not satisfied, the process proceeds to step S80.
3. The electronic expansion valve control method according to claim 1, wherein the electronic expansion valve opening condition is:
t1 ℃ is more than TS +. DELTA.T 1, wherein T1 ℃ is the temperature of the cold storage or the showcase, TS is the set value of the storage temperature, and DELTA.T 1 is the deviation of the storage temperature.
4. A method as claimed in claim 3, wherein the electronic expansion valve closing condition is:
T1℃<TS-△T1。
5. the method of claim 1, wherein calculating the number of steps of the electronic expansion valve comprises:
Δ B ═ K Δ T2-P Δ T3, where: the delta B is the number of the changing steps, K, P is a preset parameter, the delta T2 is the difference value between the temperature of the coil at the outlet of the evaporator and the temperature of the coil at the middle part of the evaporator, and the delta T3 is the difference value delta T3 between the temperature of the cold storage or the display cabinet and the coil at the outlet of the evaporator.
6. An electronic expansion valve control device is characterized by comprising a sensor module, a data acquisition module, an MCU (microprogrammed control unit) processor, an electronic expansion valve execution module and a controller;
the sensor module contains three temperature sensor, and is three temperature sensor is used for gathering freezer or show case temperature, evaporator intermediate coil pipe temperature, evaporimeter outlet coil pipe temperature signal respectively and sends to the controller, the data acquisition module is used for gathering cold air blower operating parameter in the freezer and sends to the controller, the MCU treater is used for according to the order of controller calculates and handles, electronic expansion valve execution module with the controller is connected and is used for carrying out electronic expansion valve.
7. A controller for performing the electronic expansion valve control method of any of claims 1-5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110241321.0A CN112880248A (en) | 2021-03-04 | 2021-03-04 | Electronic expansion valve control method, device and controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353277A (en) * | 2021-11-30 | 2022-04-15 | 珠海格力电器股份有限公司 | Anti-frosting control method and anti-frosting air conditioner |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476803A (en) * | 2009-01-22 | 2009-07-08 | 上海爱控自动化设备有限公司 | Energy-saving refrigeration control system and method thereof |
| CN103743063A (en) * | 2014-01-17 | 2014-04-23 | 苏州海特温控技术有限公司 | Method of controlling electronic expansion valve during refrigeration of air conditioner |
| CN103776131A (en) * | 2014-01-17 | 2014-05-07 | 苏州海特温控技术有限公司 | Control method of electronic expansion valve for refrigerating of air conditioner |
| CN107388623A (en) * | 2017-08-30 | 2017-11-24 | 合肥美的暖通设备有限公司 | Control method, control system and the heat pump of electric expansion valve |
| CN110057025A (en) * | 2019-04-11 | 2019-07-26 | 海信（山东）空调有限公司 | Control method, device, computer product and the air-conditioning of air conditioner electronic expansion valve |
| CN110260562A (en) * | 2019-05-16 | 2019-09-20 | 广东西屋康达空调有限公司 | A kind of control method and evaporator of electronic expansion valve opening |
| CN110762915A (en) * | 2019-10-31 | 2020-02-07 | 南开大学 | Intelligent defrosting method of refrigeration system based on opening degree of electronic expansion valve |
| CN111207482A (en) * | 2020-01-07 | 2020-05-29 | 珠海格力电器股份有限公司 | Air conditioner electronic expansion valve clamping adjustment control method and air conditioner |
| CN111397102A (en) * | 2020-03-18 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Air conditioner condensation prevention control method and air conditioner |
-
2021
- 2021-03-04 CN CN202110241321.0A patent/CN112880248A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476803A (en) * | 2009-01-22 | 2009-07-08 | 上海爱控自动化设备有限公司 | Energy-saving refrigeration control system and method thereof |
| CN103743063A (en) * | 2014-01-17 | 2014-04-23 | 苏州海特温控技术有限公司 | Method of controlling electronic expansion valve during refrigeration of air conditioner |
| CN103776131A (en) * | 2014-01-17 | 2014-05-07 | 苏州海特温控技术有限公司 | Control method of electronic expansion valve for refrigerating of air conditioner |
| CN107388623A (en) * | 2017-08-30 | 2017-11-24 | 合肥美的暖通设备有限公司 | Control method, control system and the heat pump of electric expansion valve |
| CN110057025A (en) * | 2019-04-11 | 2019-07-26 | 海信（山东）空调有限公司 | Control method, device, computer product and the air-conditioning of air conditioner electronic expansion valve |
| CN110260562A (en) * | 2019-05-16 | 2019-09-20 | 广东西屋康达空调有限公司 | A kind of control method and evaporator of electronic expansion valve opening |
| CN110762915A (en) * | 2019-10-31 | 2020-02-07 | 南开大学 | Intelligent defrosting method of refrigeration system based on opening degree of electronic expansion valve |
| CN111207482A (en) * | 2020-01-07 | 2020-05-29 | 珠海格力电器股份有限公司 | Air conditioner electronic expansion valve clamping adjustment control method and air conditioner |
| CN111397102A (en) * | 2020-03-18 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Air conditioner condensation prevention control method and air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353277A (en) * | 2021-11-30 | 2022-04-15 | 珠海格力电器股份有限公司 | Anti-frosting control method and anti-frosting air conditioner |
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