ELECTRONIC EXPANSION VALVE AND CONTROL METHOD THEREOF
First Claim
1. A controller for an electronic expansion valve, comprising an information receiving unit, an operating condition determining unit and a control unit;
- wherein,the information receiving unit is configured to receive sensor information, control command information, or feedback information;
the operating condition determining unit is configured to determine an operation condition of the electronic expansion valve according to the information received by the information receiving unit, and output a control signal corresponding to the operating condition according to the operating condition of the electronic expansion valve; and
the control unit is configured to output a current control signal to control inputting a current corresponding to the operating condition into a stepping motor of the electronic expansion valve according to the control signal outputted by the operating condition determining unit.
2 Assignments
0 Petitions
Accused Products
Abstract
An electronic expansion valve of an air-conditioning system includes a valve body and an expansion valve controller; the valve body includes a refrigerant channel, a valve pin, and a stepping motor; the stepping motor controls the movement of the valve pin to adjust the size of the opening of the refrigerant channel; the expansion valve controller outputs different control signals according to different operation conditions of the electronic expansion valve; inputting different current to the stepping motor so as to drive the stepping motor to rotate; and controlling the movement of the valve pin to adjust the size of the refrigerant channel. The electronic expansion valve employs different current to drive a stepping motor according to different operation conditions, thus reducing system energy consumption, overcoming abnormal fault of the motor, and extending the service life of the electronic expansion valve.
-
Citations
27 Claims
-
1. A controller for an electronic expansion valve, comprising an information receiving unit, an operating condition determining unit and a control unit;
- wherein,
the information receiving unit is configured to receive sensor information, control command information, or feedback information; the operating condition determining unit is configured to determine an operation condition of the electronic expansion valve according to the information received by the information receiving unit, and output a control signal corresponding to the operating condition according to the operating condition of the electronic expansion valve; and the control unit is configured to output a current control signal to control inputting a current corresponding to the operating condition into a stepping motor of the electronic expansion valve according to the control signal outputted by the operating condition determining unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- wherein,
-
8. An electronic expansion valve, comprising a valve body and a controller for the electronic expansion valve, wherein the valve body comprises a passage allowing refrigerant to flow, a valve needle configured to cooperate with the passage, and a stepping motor configured to control the motion of the valve needle to adjust an opening degree of the passage of the refrigerant;
- the controller for the electronic expansion valve is configured to output, according to an operating condition of the electronic expansion valve, a control signal corresponding to the operation condition to control inputting a current into the stepping motor, to drive the stepping motor to rotate, and the stepping motor is configured to rotate to drive the valve needle to move, to adjust the opening degree of the passage of the refrigerant.
- View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
19. A control method for an electronic expansion valve, the electronic expansion valve comprising a valve body and a controller for the electronic expansion valve, the valve body comprising a passage allowing refrigerant to flow, a valve needle configured to cooperate with the passage, and a stepping motor configured to control the motion of the valve needle to adjust an opening degree of the passage of the refrigerant, and the stepping motor being controlled by the controller for the electronic expansion valve, wherein the control method comprises:
determining, by the controller for the electronic expansion valve, an operating condition of the electronic expansion valve according to received information, and inputting, by the controller for the electronic expansion valve, a current corresponding to the operating condition into the stepping motor of the electronic expansion valve according to the operating condition of the electronic expansion valve. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
Specification