Double-threshold-value type power-saving silencing AC electromagnetic valve

Abstract

The invention relates to a double-threshold-value type power-saving silencing AC electromagnetic valve which comprises a power-saving unit 100 and a conventional AC electromagnetic valve and is characterized in that the power-saving unit 100 consists of an AC-DC (Alternating Current to Direct Current) converting circuit 101, a switching pulse generating circuit 102, a switching circuit 103, a sustaining voltage step-down circuit 104 and an electric bridge circuit 105, wherein the AC-DC converting circuit 101 is a double-threshold-value type converting circuit.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a "dual-threshold type power-saving and noise-saving AC solenoid valve" with the functions of saving electric energy and static noise. 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] AC solenoid valve is a type of solenoid valve, and it is a low-voltage electrical appliance widely used in household appliances and industrial control equipment. Its characteristic is that the AC voltage is connected to the excitation coil, and the AC current is used to generate the electromagnetic force that drives the valve to open and close. [0004] The AC 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 controlling fluid (gas or liquid)...

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Problems solved by technology

[0016] 1. Heating: As mentioned above, in the push and hold stages, the traditional AC solenoid valves are all connected with the same AC voltage (such as AC220V), so the heating is serious, and the phenomenon that the excitation coil is burned due to overheating often occurs;

[0017] 2. Power consumption: The heat energy of the traditional AC solenoid valve is the electric energy input into the excitation coil. Another disadvantage brought about by this harmful heat is unnecessary power consumption.

[0018] 3. Out of control: After the excitation coil heats up, its impedance increases, the current becomes smaller, and the electromagnetic force also decreases accordingly, so that the valve core cannot be pushed to the set position, and the household appliances or industrial control equipment will be out of control because of this.

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