Direct-current electromagnetic valve with integrated circuit type high-low level switching circuit

Abstract

A direct-current electromagnetic valve with an integrated circuit type high-low level switching circuit comprises a power saving unit (100) and a traditional direct-current electromagnetic valve. The direct-current electromagnetic valve is characterized in that the power saving unit (100) is composed of a switch pulse generation circuit (101), the high-low level switching circuit (102), a switching circuit (103), an error connection prevention diode (D1) and a fly-wheel diode (D5). The high-low level switching circuit (102) is the integrated circuit type high-low level switching circuit which is composed of a second integrated voltage comparator (IC1-2), a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6), a first capacitor (C1), a second diode (D2), a third diode (D3), a fourteenth input end and a twelfth input end.

Description

technical field [0001] The invention relates to the field of DC electric appliances, in particular to a "DC solenoid valve equipped with an integrated circuit type high-low level conversion circuit" with power-saving function. Background technique [0002] Electromagnetic valve is a fluid control device that relies on the electromagnetic force generated by the excitation coil to drive the valve to open and close. [0003] DC solenoid valve is a type of solenoid valve, and it is a DC electrical appliance widely used in household appliances and industrial control equipment. Its characteristic is that DC voltage is connected to the excitation coil, and DC current is used to generate electromagnetic force to drive the valve to open and close. [0004] The DC solenoid valve is mainly composed of an excitation coil, a valve core and a return spring. Figure 1a , Figure 1b It is a schematic diagram of direct current solenoid valve controlling fluid (air or liquid) on and off; ...

AI Technical Summary

Problems solved by technology

[0016] 1. Heating: The traditional DC solenoid valve has serious heating due to excessive power, and the phenomenon that the excitation coil is burned due to overheating also occurs frequently;

[0017] 2. Power consumption: Another shortcoming of the traditional DC solenoid valve is to maintain excessive power and useless power consumption. Reducing this power consumption can achieve the effect of "power saving";

[0018] 3. Out of control: After the excitation coil heats up, its impedance increases, the current becomes smaller, and the electromagnetic force also decreases. If the solenoid valve is started again at this time, the valve core will be difficult to reach the set position due to the small electromagnetic force. Or the industrial control equipment will lose control of the system

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