CN114857809A - Control system and control method of electronic expansion valve - Google Patents
Control system and control method of electronic expansion valve Download PDFInfo
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- CN114857809A CN114857809A CN202210434434.7A CN202210434434A CN114857809A CN 114857809 A CN114857809 A CN 114857809A CN 202210434434 A CN202210434434 A CN 202210434434A CN 114857809 A CN114857809 A CN 114857809A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 89
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 230000008054 signal transmission Effects 0.000 claims abstract description 26
- 230000009471 action Effects 0.000 claims abstract description 22
- 230000007613 environmental effect Effects 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims description 21
- 230000036760 body temperature Effects 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 8
- 239000003507 refrigerant Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a control system and a control method for an electronic expansion valve, and relates to the technical field of electronic expansion valves. The control system of the electronic expansion valve comprises an environmental parameter monitoring module, an execution control module, a signal transmission module, a double-flow-channel valve body module and a regulation and control shunt module, wherein the environmental parameter monitoring module is connected with the execution control module through the signal transmission module, the execution control module is connected with the double-flow-channel valve body module through the signal transmission module, and the double-flow-channel valve body module is connected with the regulation and control shunt module through the signal transmission module. Monitoring is respectively carried out in evaporimeter and the liquid storage cylinder through environmental parameter monitoring module, differentiates parameter information through signal execution unit, judges the step number that the electronic expansion valve body needs to be adjusted, through monitoring the environment in evaporimeter and the liquid storage cylinder, carries out control work again, has guaranteed control accuracy to the condition that action execution is not in place has been avoided.
Description
Technical Field
The invention relates to the technical field of electronic expansion valves, in particular to a control system and a control method of an electronic expansion valve.
Background
The electronic expansion valve controls the voltage or current applied to the expansion valve by utilizing the electric signal generated by the regulated parameter, thereby achieving the purpose of regulating the liquid supply amount.
The existing electronic expansion valve cannot be controlled according to detailed parameters in an evaporator and a liquid storage cylinder when being controlled, so that the control effect is poor, and when the electronic expansion valve executes actions, the actions may be out of step due to the influences of many factors such as too high action speed, electromagnetic interference, driving voltage and the like, namely the actions are not executed or are not executed in place.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a control system and a control method of an electronic expansion valve, and solves the problems that the existing control system of the electronic expansion valve is poor in control effect and can cause the situation of insufficient action execution.
In order to achieve the purpose, the invention is realized by the following technical scheme: a control system of an electronic expansion valve comprises an environmental parameter monitoring module, an execution control module, a signal transmission module, a double-flow-channel valve body module and a regulation and control shunt module, wherein the environmental parameter monitoring module and the execution control module are connected with each other through the signal transmission module;
the transmission mode of the signal transmission module comprises any one of a TCP/IP protocol, an IPX/SPX protocol and GPRS wireless data.
Preferably, the environmental parameter monitoring module comprises a pressure monitoring unit, a temperature monitoring unit, a flow monitoring unit, a liquid level sensing unit and a flow rate monitoring unit, wherein the pressure monitoring unit is a pressure monitoring instrument and used for monitoring the hydraulic pressure at the outlet of the evaporator, the temperature monitoring unit is a temperature monitoring instrument and used for monitoring the liquid temperature at the outlet of the evaporator, the liquid level sensing unit is a liquid level sensor and used for monitoring the liquid level of the refrigerant in the liquid storage cylinder, the flow monitoring unit is a rotor flow meter and used for monitoring the liquid flow in the pipeline, and the flow rate monitoring unit is based on the flow rate monitoring unitCalculating according to the value monitored by the flow monitoring unit to obtain the flow velocity in the pipeline, wherein the calculation formula is as follows: V-Q/pi R 2 Wherein Q is the liquid flow in the pipeline, pi R 2 Is the size of the internal sectional area of the pipeline.
Preferably, the execution control module includes a driving control unit, a signal receiving unit and a signal execution unit, the signal receiving unit and the environmental parameter monitoring module are connected with each other through a signal transmission module, the signal receiving unit and the signal execution unit are connected with each other through a signal transmission module, and the signal execution unit and the driving control unit are connected with each other through a signal transmission module.
Preferably, double-flow-passage valve body module is including electron expansion valve body, three-way valve, valve body temperature detecting element and connecting tube, the connecting tube is a mouthful font, the three-way valve is located connecting tube left side intermediate position, be equipped with on the connecting tube two electron expansion valve body and electron expansion valve body respectively with be connected through the connecting tube between two interfaces of three-way valve, the other interface of three-way valve electromagnetism passes through the connecting tube and is connected with the liquid storage cylinder, the internal valve body temperature detecting element that all is equipped with of electron expansion valve, valve body temperature detecting element is used for the inside temperature measurement that carries on of the electron expansion valve body that corresponds, the inside reduction gear group that all is equipped with of electron expansion valve body.
Preferably, the regulating and controlling flow distribution module comprises a three-way valve control unit, a temperature information receiving unit and a calculating and allocating unit, the three-way valve control unit is connected with the three-way valve, the temperature information receiving unit is connected with the valve body temperature detection unit through an information transmission module, and the calculating and allocating unit is connected with the temperature information receiving unit and the three-way valve control unit through the information transmission module.
Preferably, the drive control unit is a stepping motor, and the stepping motor transmits the magnetic torque to the needle valve through a reduction gear set in the electronic expansion valve.
Preferably, the control method of the control system of the electronic expansion valve includes the steps of:
s1. parameter acquisition
The hydraulic pressure at the outlet of the evaporator is monitored by the pressure monitoring unit, the liquid temperature at the outlet of the evaporator is monitored by the temperature monitoring unit, the liquid flow in the pipeline is monitored by the flow monitoring unit, the liquid level of the refrigerant in the liquid storage cylinder is monitored by the liquid level sensing unit, and the liquid flow velocity in the pipeline is calculated by the flow velocity monitoring unit;
s2, judging parameters
The parameter information acquired by the environmental parameter monitoring module is transmitted to a signal receiving unit in the execution control module through the information transmission module, and the parameter information is judged through the signal execution unit to judge the number of steps of the electronic expansion valve body needing to be adjusted;
s3, executing control
The step number of the electronic expansion valve body to be adjusted is transmitted to the drive control unit through the information transmission module, the stepping motor starts to work, the magnetic torque of the stepping motor is transmitted to the needle valve through the reduction gear, the electronic expansion valve body is driven to perform opening or closing actions, when the electronic expansion valve body is fully opened or fully closed in the operation process, the opening action is continuously performed for a plurality of steps when the electronic expansion valve body is fully opened, and the closing action is continuously performed for a plurality of steps when the electronic expansion valve body is fully closed, so that the purpose of calibrating the step number of the electronic expansion valve is achieved.
The working principle is as follows: the hydraulic pressure at the outlet of the evaporator is monitored by a pressure monitoring unit, the liquid temperature at the outlet of the evaporator is monitored by a temperature monitoring unit, the liquid flow in the pipeline is monitored by a flow monitoring unit, the liquid level of refrigerant in a liquid storage cylinder is monitored by a liquid level sensing unit, the liquid flow velocity in the pipeline is calculated by a flow velocity monitoring unit, the parameter information acquired by an environmental parameter monitoring module is transmitted to a signal receiving unit in an execution control module by an information transmission module, the parameter information is distinguished by a signal execution unit, the step number of the electronic expansion valve body needing to be adjusted is judged, the step number of the electronic expansion valve body needing to be adjusted is transmitted to a driving control unit by the information transmission module, a stepping motor starts to work, the magnetic torque of the stepping motor is transmitted to a needle valve by a reduction gear, and then the electronic expansion valve body is driven to perform opening or closing action, when the electronic expansion valve body is fully opened or fully closed in the operation process, the opening action is continuously executed for a plurality of steps when the electronic expansion valve body is fully opened by adjusting the step number of the electronic expansion valve body, and the closing action is continuously executed for a plurality of steps when the electronic expansion valve body is fully closed, so that the purpose of calibrating the step number of the electronic expansion valve is achieved; the temperature inside the electronic expansion valve body can be detected through the valve body temperature detection unit, when one temperature is higher, the connecting pipeline between the three-way valve and the electronic expansion valve body is closed through the three-way valve control unit, meanwhile, the connecting pipeline of the other electronic expansion valve body is opened, and liquid circulates through the other electronic expansion valve body.
The invention provides a control system and a control method of an electronic expansion valve. The method has the following beneficial effects:
the invention respectively monitors the evaporator and the liquid storage cylinder through the environmental parameter monitoring module, the parameter information acquired by the environmental parameter monitoring module is transmitted to the signal receiving unit in the execution control module through the information transmission module, the parameter information is distinguished through the signal execution unit, the step number of the electronic expansion valve body needing to be adjusted is judged, the step number of the electronic expansion valve body needing to be adjusted is transmitted to the driving control unit through the information transmission module, the stepping motor starts to work, the magnetic torque of the stepping motor is transmitted to the needle valve through the reduction gear, the electronic expansion valve body is further driven to perform opening or closing actions, the control work is executed through monitoring the environment in the evaporator and the liquid storage cylinder, the control accuracy is ensured, and the situation that the action is not performed in place is avoided.
Drawings
FIG. 1 is a block diagram of the system architecture of the present invention;
FIG. 2 is a schematic block diagram of a dual flow passage valve body of the present invention;
FIG. 3 is a block diagram of a dual flow valve body module configuration of the present invention;
FIG. 4 is a block diagram of an environmental parameter monitoring module according to the present invention;
FIG. 5 is a block diagram of a regulating and controlling module according to the present invention;
FIG. 6 is a block diagram of the control module according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The first embodiment is as follows:
as shown in fig. 1 to 6, an embodiment of the present invention provides a control system for an electronic expansion valve, including an environmental parameter monitoring module, an execution control module, a signal transmission module, a dual-flow-channel valve body module, and a regulation and control flow-dividing module, where the environmental parameter monitoring module and the execution control module are connected to each other through the signal transmission module, the execution control module and the dual-flow-channel valve body module are connected to each other through the signal transmission module, and the dual-flow-channel valve body module and the regulation and control flow-dividing module are connected to each other through the signal transmission module;
the transmission mode of the signal transmission module comprises any one of a TCP/IP protocol, an IPX/SPX protocol and GPRS wireless data.
The environmental parameter monitoring module is including pressure monitoring unit, temperature monitoring unit, flow monitoring unit, liquid level sensing unit and velocity of flow monitoring unit, pressure monitoring unit is pressure monitoring instrument, a hydraulic pressure for monitoring the evaporimeter exit, temperature monitoring unit is temperature monitoring instrument, a liquid temperature for monitoring the evaporimeter exit, liquid level sensing unit is level sensor, a refrigerant liquid level for monitoring the liquid reserve tank, flow monitoring unit is the rotor flow ware, a liquid flow for monitoring in the pipeline, the numerical value that the velocity of flow monitoring unit monitored according to flow monitoring unit calculates, reach the velocity of flow in the pipeline, the computational formula is: V-Q/pi R 2 Wherein Q is the liquid flow in the pipeline, pi R 2 Is the size of the internal sectional area of the pipeline.
The execution control module comprises a drive control unit, a signal receiving unit and a signal execution unit, the signal receiving unit is connected with the environmental parameter monitoring module through a signal transmission module, the signal receiving unit is connected with the signal execution unit through a signal transmission module, and the signal execution unit is connected with the drive control unit through a signal transmission module.
The double-flow-passage valve body module comprises an electronic expansion valve body, a three-way valve, a valve body temperature detection unit and a connecting pipeline, the connecting pipeline is in a shape like a Chinese character 'kou', the three-way valve is located at the middle position of the left side of the connecting pipeline, the connecting pipeline is provided with two electronic expansion valve bodies and the electronic expansion valve bodies, the two electronic expansion valve bodies are respectively connected with two interfaces of the three-way valve through the connecting pipeline, the other interface of the three-way valve electromagnetism is connected with a liquid storage cylinder through the connecting pipeline, the electronic expansion valve body is internally provided with the valve body temperature detection unit, the valve body temperature detection unit is used for measuring the temperature of the corresponding electronic expansion valve body, and the electronic expansion valve body is internally provided with a reduction gear set.
The regulating and controlling flow distribution module comprises a three-way valve control unit, a temperature information receiving unit and a calculating and allocating unit, the three-way valve control unit is connected with the three-way valve, the temperature information receiving unit is connected with the valve body temperature detection unit through an information transmission module, and the calculating and allocating unit is connected with the temperature information receiving unit and the three-way valve control unit through the information transmission module.
The drive control unit is a stepping motor, and the stepping motor transmits the magnetic torque to the needle valve through a reduction gear set in the electronic expansion valve.
The environment parameter monitoring module respectively monitors the evaporator and the liquid storage cylinder, the parameter information collected by the environment parameter monitoring module is transmitted to a signal receiving unit in an execution control module through an information transmission module, the parameter information is distinguished through the signal execution unit, the step number of the electronic expansion valve body needing to be adjusted is judged, the step number of the electronic expansion valve body needing to be adjusted is transmitted to a driving control unit through the information transmission module, a stepping motor starts to work and transmits the magnetic torque thereof to a needle valve through a reduction gear, the electronic expansion valve body is further driven to execute opening or closing actions, the environment in the evaporator and the liquid storage cylinder is monitored, the control work is executed again, the control accuracy is ensured, the situation that the actions are not executed in place is avoided, the temperature in the electronic expansion valve body can be detected through the valve body temperature detection unit, when one of the temperatures is higher, the connecting pipeline between the three-way valve and the electronic expansion valve body is closed through the three-way valve control unit, meanwhile, the connecting pipeline of the other electronic expansion valve body is opened, and liquid circulates through the other electronic expansion valve body.
Example two:
as shown in fig. 1 to 6, an embodiment of the present invention provides a control method for a control system of an electronic expansion valve, including the following steps:
s1. parameter acquisition
The hydraulic pressure at the outlet of the evaporator is monitored by the pressure monitoring unit, the liquid temperature at the outlet of the evaporator is monitored by the temperature monitoring unit, the liquid flow in the pipeline is monitored by the flow monitoring unit, the liquid level of the refrigerant in the liquid storage cylinder is monitored by the liquid level sensing unit, and the liquid flow velocity in the pipeline is calculated by the flow velocity monitoring unit;
s2, judging parameters
Parameter information acquired by the environmental parameter monitoring module is transmitted to a signal receiving unit in the execution control module through the information transmission module, and the parameter information is judged through the signal execution unit to judge the number of steps of the electronic expansion valve body needing to be adjusted;
s3, executing control
The step number of the electronic expansion valve body to be adjusted is transmitted to the drive control unit through the information transmission module, the stepping motor starts to work, the magnetic torque of the stepping motor is transmitted to the needle valve through the reduction gear, the electronic expansion valve body is driven to perform opening or closing actions, when the electronic expansion valve body is fully opened or fully closed in the operation process, the opening action is continuously performed for a plurality of steps when the electronic expansion valve body is fully opened, and the closing action is continuously performed for a plurality of steps when the electronic expansion valve body is fully closed, so that the purpose of calibrating the step number of the electronic expansion valve is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a control system of electronic expansion valve, includes environmental parameter monitoring module, execution control module, signal transmission module, double-flow-passage valve body module and regulation and control reposition of redundant personnel module, its characterized in that: the environment parameter monitoring module is connected with the execution control module through a signal transmission module, the execution control module is connected with the double-flow-channel valve body module through a signal transmission module, and the double-flow-channel valve body module is connected with the regulation and control shunt module through a signal transmission module;
the transmission mode of the signal transmission module comprises any one of a TCP/IP protocol, an IPX/SPX protocol and GPRS wireless data.
2. A control system for an electronic expansion valve according to claim 1, wherein: the environment parameter monitoring module comprises a pressure monitoring unit, a temperature monitoring unit, a flow monitoring unit, a liquid level sensing unit and a flow rate monitoring unit, wherein the pressure monitoring unit is a pressure monitoring instrument and used for monitoring the hydraulic pressure at the outlet of the evaporator, the temperature monitoring unit is a temperature monitoring instrument and used for monitoring the liquid temperature at the outlet of the evaporator, the liquid level sensing unit is a liquid level sensor and used for monitoring the liquid level of a refrigerant in the liquid storage cylinder, the flow monitoring unit is a rotor flow meter and used for monitoring the liquid flow in the pipeline, the flow rate monitoring unit calculates according to the numerical value monitored by the flow monitoring unit to obtain the flow rate in the pipeline, and the calculation formula is as follows: V-Q/pi R 2 Wherein Q is the liquid flow in the pipeline, pi R 2 The inner section area of the pipeline is largeIs small.
3. A control system for an electronic expansion valve according to claim 1, wherein: the execution control module comprises a drive control unit, a signal receiving unit and a signal execution unit, the signal receiving unit is connected with the environmental parameter monitoring module through a signal transmission module, the signal receiving unit is connected with the signal execution unit through a signal transmission module, and the signal execution unit is connected with the drive control unit through a signal transmission module.
4. A control system for an electronic expansion valve according to claim 1, wherein: double-flow-passage valve body module is including electron expansion valve body, three-way valve, valve body temperature detecting element and connecting tube, the connecting tube is a mouthful font, the three-way valve is located connecting tube left side intermediate position, be equipped with on the connecting tube two electron expansion valve body and electron expansion valve body respectively with be connected through the connecting tube between two interfaces of three-way valve, the other interface of three-way valve electromagnetism passes through the connecting tube and is connected with the liquid storage cylinder, the internal valve body temperature detecting element that all is equipped with of electron expansion valve, valve body temperature detecting element is used for carrying out the temperature measurement to the inside of the electron expansion valve body that corresponds, the inside reduction gear group that all is equipped with of electron expansion valve body.
5. A control system for an electronic expansion valve according to claim 1, wherein: the regulating and controlling flow distribution module comprises a three-way valve control unit, a temperature information receiving unit and a calculating and allocating unit, the three-way valve control unit is connected with the three-way valve, the temperature information receiving unit is connected with the valve body temperature detection unit through an information transmission module, and the calculating and allocating unit is connected with the temperature information receiving unit and the three-way valve control unit through the information transmission module.
6. A control system for an electronic expansion valve according to claim 3, wherein: the drive control unit is a stepping motor, and the stepping motor transmits the magnetic torque to the needle valve through a reduction gear set in the electronic expansion valve.
7. The control method of a control system of an electronic expansion valve according to claim 1, characterized in that: the method comprises the following steps:
s1. parameter acquisition
The hydraulic pressure at the outlet of the evaporator is monitored by the pressure monitoring unit, the liquid temperature at the outlet of the evaporator is monitored by the temperature monitoring unit, the liquid flow in the pipeline is monitored by the flow monitoring unit, the liquid level of the refrigerant in the liquid storage cylinder is monitored by the liquid level sensing unit, and the liquid flow velocity in the pipeline is calculated by the flow velocity monitoring unit;
s2, judging parameters
The parameter information acquired by the environmental parameter monitoring module is transmitted to a signal receiving unit in the execution control module through the information transmission module, and the parameter information is judged through the signal execution unit to judge the number of steps of the electronic expansion valve body needing to be adjusted;
s3, executing control
The step number of the electronic expansion valve body to be adjusted is transmitted to the drive control unit through the information transmission module, the stepping motor starts to work, the magnetic torque of the stepping motor is transmitted to the needle valve through the reduction gear, the electronic expansion valve body is driven to perform opening or closing actions, when the electronic expansion valve body is fully opened or fully closed in the operation process, the opening action is continuously performed for a plurality of steps when the electronic expansion valve body is fully opened, and the closing action is continuously performed for a plurality of steps when the electronic expansion valve body is fully closed, so that the purpose of calibrating the step number of the electronic expansion valve is achieved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210434434.7A CN114857809A (en) | 2022-04-24 | 2022-04-24 | Control system and control method of electronic expansion valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210434434.7A CN114857809A (en) | 2022-04-24 | 2022-04-24 | Control system and control method of electronic expansion valve |
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| CN202210434434.7A Pending CN114857809A (en) | 2022-04-24 | 2022-04-24 | Control system and control method of electronic expansion valve |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03221760A (en) * | 1990-01-26 | 1991-09-30 | Saginomiya Seisakusho Inc | Method and apparatus for controlling refrigerant flow in heat pump air conditioner |
| JP2005315550A (en) * | 2004-04-29 | 2005-11-10 | Ysd:Kk | Refrigerant flow control device |
| CN101900464A (en) * | 2009-05-27 | 2010-12-01 | 江森自控楼宇设备科技(无锡)有限公司 | Control system of electronic expansion valve |
| JP2011257040A (en) * | 2010-06-08 | 2011-12-22 | Mitsubishi Electric Building Techno Service Co Ltd | Refrigerator and control device of electronic expansion valve for the same |
| CN102997514A (en) * | 2011-09-09 | 2013-03-27 | 常州晶冷工业制冷设备有限公司 | Water-cooled type low-temperature refrigerant compressor unit with economizer and silencer |
| CN110094841A (en) * | 2019-04-15 | 2019-08-06 | 青岛海尔空调电子有限公司 | Control method for electronic expansion valve and air-conditioning for air-conditioning |
| CN110440492A (en) * | 2019-08-16 | 2019-11-12 | 宁波奥克斯电气股份有限公司 | Air conditioning control method, device and air conditioner |
-
2022
- 2022-04-24 CN CN202210434434.7A patent/CN114857809A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03221760A (en) * | 1990-01-26 | 1991-09-30 | Saginomiya Seisakusho Inc | Method and apparatus for controlling refrigerant flow in heat pump air conditioner |
| JP2005315550A (en) * | 2004-04-29 | 2005-11-10 | Ysd:Kk | Refrigerant flow control device |
| CN101900464A (en) * | 2009-05-27 | 2010-12-01 | 江森自控楼宇设备科技(无锡)有限公司 | Control system of electronic expansion valve |
| JP2011257040A (en) * | 2010-06-08 | 2011-12-22 | Mitsubishi Electric Building Techno Service Co Ltd | Refrigerator and control device of electronic expansion valve for the same |
| CN102997514A (en) * | 2011-09-09 | 2013-03-27 | 常州晶冷工业制冷设备有限公司 | Water-cooled type low-temperature refrigerant compressor unit with economizer and silencer |
| CN110094841A (en) * | 2019-04-15 | 2019-08-06 | 青岛海尔空调电子有限公司 | Control method for electronic expansion valve and air-conditioning for air-conditioning |
| CN110440492A (en) * | 2019-08-16 | 2019-11-12 | 宁波奥克斯电气股份有限公司 | Air conditioning control method, device and air conditioner |
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