Opening control method of electric ball valve and control circuit

An electric ball valve and control method technology, applied in valve details, valve devices, engine components, etc., can solve the problems of inability to achieve opening positioning, difficult to accurately control flow, etc., to achieve precise positioning and control, eliminate rotation errors, and ensure The effect of precision and reliability

CN102661429BActive Publication Date: 2013-12-18JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2013-12-18

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Abstract

The invention relates to an opening control method of an accurately positioned electric ball valve and a control circuit thereof. The control circuit comprises a master control unit (MCU), a magnetic induction circuit, a permanent magnet, a motor driving circuit, a data interface circuit, a key interface circuit and a state display circuit, wherein each state inductor enabling signal ENi from the MCU is received by the magnetic induction circuit; a current induction signal F is fed back to the MCU by the magnetic induction circuit; the MCU is connected with the data interface circuit and is connected with the motor driving circuit through two signals, i.e., a clockwise rotation JK1 signal and an anticlockwise rotation JK2 signal, so that rotation control over the motor is realized; and display of a corresponding LED (Light Emitting Diode) is realized by the state display circuit by receiving the state signal SF from the MCU. According to the control circuit, adjustment error brought by non-linear variation in opening during adjustment of the ball valve can be eliminated, rotation error of a normal speed reducing synchronous motor can also be eliminated, accurate positioning and control of the electric ball valve are realized, and the accuracy and the reliability of flow control and flow estimation are guaranteed.
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Description

technical field

[0001] The invention relates to an intelligent control method of an electric ball valve and a control circuit thereof, in particular to a method for controlling the opening of an electric ball valve based on precise positioning and a control circuit thereof. Background technique

[0002] With the development of computer technology and control technology, it has become the main control method of indoor heating and cooling systems to realize the control of water / air flow through intelligent control technology, and then realize the indoor temperature adjustment. Among them, the solenoid valve and the electric ball valve are the main actuators to realize the flow adjustment. Since the solenoid valve is difficult to realize the opening adjustment, the electric ball valve has become the preferred actuator for the control of the water / air flow. For this reason, the patent [CN200620164878.X] discloses a remote control radiator temperature control valve, which uses a ...

Examples

Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing:

[0029] The invention provides a method for controlling the opening of an electric ball valve, which includes the following steps:

[0030] (1) Install three permanent magnets K1, K2 and K3 clockwise on the shaft of the ball valve at intervals of 90 degrees. Magnetic sensors P1, P2 and P3;

[0031] (2) At intervals of 1 degree, establish a mapping table MapTable between the rotation angle α and the ball valve opening K in the interval [0,90];

[0032] (3) Set the opening accuracy 1 / Kd of the ball valve, and calculate the positioning angle Angi of each opening according to the linear interpolation method based on the opening accuracy 1 / Kd of the ball valve, where 0

[0033] (4) According to the positioning angle Angi of each opening degree, Kd-1 magnetic inductors PTi are relatively evenly installed in three 90-degree areas in the clockwise direction ...