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CN-122015350-A - Electronic expansion valve driving device and refrigeration equipment

CN122015350ACN 122015350 ACN122015350 ACN 122015350ACN-122015350-A

Abstract

The invention provides an electronic expansion valve driving device and refrigeration equipment, which belong to the technical field of control, wherein the electronic expansion valve driving device comprises a main control module, a power driving module, a locked rotor detection module and a control module, wherein the power driving module is connected with the main control module and used for driving a motor in an electronic expansion valve, the locked rotor detection module is connected with the main control module or the power driving module and used for determining the running state of the motor by monitoring one or more running parameters of the motor in the process of driving the motor by the power driving module, and the power driving module is controlled to stop driving the motor based on the running state of the motor. By introducing the locked rotor detection module to monitor the operation parameters reflecting the rotation condition of the motor in real time, the locked rotor fault which cannot be perceived by the traditional technology can be accurately identified. Thereby avoiding the risk of burning out the motor due to overload heating, and improving the operation reliability and the service life of the driving device and even the whole refrigeration equipment.

Inventors

  • CHEN JIE

Assignees

  • 北京京仪自动化装备技术股份有限公司

Dates

Publication Date
20260512
Application Date
20260130

Claims (10)

  1. 1. An electronic expansion valve driving device, characterized by comprising: a main control module; The power driving module is connected with the main control module and used for driving a motor in the electronic expansion valve; The locked rotor detection module is connected with the main control module or the power driving module and is used for determining the running state of the motor by monitoring one or more running parameters of the motor in the process of driving the motor by the power driving module, and And controlling the power driving module to stop driving the motor based on the running state of the motor as locked rotor.
  2. 2. The electronic expansion valve driving device according to claim 1, wherein the operation parameter includes a back electromotive force of the motor.
  3. 3. The electronic expansion valve driving device according to claim 1, characterized in that the electronic expansion valve driving device further comprises: The fault alarm module is connected with the locked rotor detection module and is used for outputting first alarm information under the condition that the running state of the motor is locked rotor; wherein the first alarm information comprises local alarm information and/or remote alarm information.
  4. 4. An electronic expansion valve driving device according to claim 3, wherein the operating parameters include a driving current of the motor and/or a motor temperature; The locked rotor detection module is also used for: Based on the drive current being greater than or equal to a preset current threshold or the motor temperature being greater than a preset rated temperature, performing at least one of: Controlling the power driving module to stop outputting a driving signal for driving the motor; and controlling the fault alarm module to output second alarm information.
  5. 5. The electronic expansion valve driving device according to any one of claims 1 to 4, characterized in that the electronic expansion valve driving device further comprises: The input end of the isolated power supply module is used for inputting a first direct current voltage, the first output end of the isolated power supply module is respectively connected with the main control module and the locked rotor detection module and is used for providing a second direct current voltage for the main control module, and the second output end of the isolated power supply module is connected with the power driving module and is used for providing a third direct current voltage for the main control module; the first direct current voltage is larger than the third direct current voltage, and the third direct current voltage is larger than the second direct current voltage.
  6. 6. The electronic expansion valve driving device according to claim 5, further comprising: A transient suppression diode arranged at the input end of the isolated power supply module and/or And the common mode inductor is arranged at the input end of the isolated power supply module.
  7. 7. The electronic expansion valve driving device according to claim 5, further comprising: And the isolated signal transmission module is connected in series with the space between the main control module and the power driving module and is used for isolating signals transmitted between the main control module and the power driving module.
  8. 8. The electronic expansion valve driving device according to claim 7, wherein the isolated signal transmission module comprises: The LED anode of the optical coupler and the LED cathode of the optical coupler are connected with the output loop of the main control module, the collector of the photoelectric detector in the optical coupler and the emitter of the photoelectric detector in the optical coupler are connected with the input loop of the power driving module, and/or The low-voltage control loop of the digital isolator is connected with the output loop of the main control module, and the high-voltage execution loop of the digital isolator is connected with the input loop of the power driving module.
  9. 9. The electronic expansion valve driving device according to any one of claims 1 to 4, characterized in that the electronic expansion valve driving device further comprises: The input end of the isolation amplifier is used for inputting an analog signal for controlling the operation of the main control module, and the output end of the isolation amplifier is connected with the signal input end of the main control module.
  10. 10. A refrigeration appliance, comprising: An electronic expansion valve; the electronic expansion valve driving device according to any one of claims 1 to 9, which is configured to drive the electronic expansion valve to operate.

Description

Electronic expansion valve driving device and refrigeration equipment Technical Field The invention relates to the technical field of control, in particular to an electronic expansion valve driving device and refrigeration equipment. Background In the existing semiconductor refrigerator compressor system, an electronic expansion valve driving device is used as a core control component, and accurate adjustment of the opening degree of the electronic expansion valve is mainly achieved, so that the flow rate of a refrigerant is controlled, and the refrigeration requirement of a semiconductor refrigeration module is matched. In the long-term use of the electronic expansion valve, the phenomenon of locked rotor may occur due to refrigerant impurity accumulation, mechanical abrasion of a valve core, clamping stagnation of a motor bearing and the like. When locked rotor occurs, the main control module can continuously output a driving signal, so that a motor in the electronic expansion valve is overheated and damaged, meanwhile, the electronic expansion valve cannot be operated to a specified opening degree, the flow of the refrigerant is out of control, the problems of large temperature fluctuation and unstable stability control of the refrigerator occur, the frequent start and stop of the compressor are caused when the temperature fluctuation of the refrigerator is severe, and the whole service life of equipment is shortened. Disclosure of Invention The invention provides an electronic expansion valve driving device and refrigeration equipment, which are used for solving the problems that in the prior art, when the stalling occurs, a motor in the electronic expansion valve is overheated and damaged, meanwhile, the flow of refrigerant is out of control, the temperature fluctuation of a refrigerator is large, the stability control is unstable, and the frequent start and stop of a compressor are caused when the temperature fluctuation is serious, so that the whole service life of the equipment is shortened, the stalling fault which cannot be perceived by the traditional technology can be accurately identified, the risk that the motor burns out due to overload heating is avoided, and the operation reliability and the service life of the driving device and even the whole refrigeration equipment are improved. The invention provides an electronic expansion valve driving device, which comprises the following modules: a main control module; The power driving module is connected with the main control module and used for driving a motor in the electronic expansion valve; The locked rotor detection module is connected with the main control module or the power driving module and is used for determining the running state of the motor by monitoring one or more running parameters of the motor in the process of driving the motor by the power driving module, and And controlling the power driving module to stop driving the motor based on the running state of the motor as locked rotor. According to the electronic expansion valve driving device provided by the invention, the operation parameters comprise the back electromotive force of the motor. According to the present invention, there is provided an electronic expansion valve driving device, further comprising: The fault alarm module is connected with the locked rotor detection module and is used for outputting first alarm information under the condition that the running state of the motor is locked rotor; wherein the first alarm information comprises local alarm information and/or remote alarm information. According to the electronic expansion valve driving device provided by the invention, the operation parameters comprise the driving current of the motor and/or the temperature of the motor; The locked rotor detection module is also used for: Based on the drive current being greater than or equal to a preset current threshold or the motor temperature being greater than a preset rated temperature, performing at least one of: Controlling the power driving module to stop outputting a driving signal for driving the motor; and controlling the fault alarm module to output second alarm information. According to the present invention, there is provided an electronic expansion valve driving device, further comprising: The input end of the isolated power supply module is used for inputting a first direct current voltage, the first output end of the isolated power supply module is respectively connected with the main control module and the locked rotor detection module and is used for providing a second direct current voltage for the main control module, and the second output end of the isolated power supply module is connected with the power driving module and is used for providing a third direct current voltage for the main control module; the first direct current voltage is larger than the third direct current voltage, and the third direct current voltage is larger than the second dire