Driving control circuit and household appliance

Abstract

The invention provides a drive control circuit and a household electrical appliance, the drive control circuit comprises a self-holding relay, a moving contact of the self-holding relay is connected to a power grid system, and when the self-holding relay is in a power-on state, the power grid system can be controlled to supply power to a load; a First relay, wherein the first relay is provided with four contacts, a first contact and a second contact in the four contacts are normally closed contacts, a third contact and a fourth contact in the four contacts are normally open contacts, the firstcontact and the fourth contact are connected to a power supply, the second contact and the third contact are connected to a ground wire, a moving contact of the first relay is connected to a controlend of the self-holding relay, the first relay is configured to output a pulse signal to the self-holding relay, and the pulse signal is a high-level pulse signal or a low-level pulse signal. Throughthe technical scheme of the invention, the power consumption of the driving control circuit is reduced, and meanwhile, the damage risk caused by electric leakage and device temperature rise is reduced, so that the service life is prolonged.

Description

technical field [0001] The present invention relates to the technical field of circuits, in particular, to a drive control circuit and a household electrical appliance. Background technique [0002] As a control component, the relay is widely used in the drive control circuit, and plays the role of automatic adjustment, safety protection, conversion circuit, etc. [0003] For example, in the drive control circuit of the outdoor unit of the inverter air-conditioning system, in order to avoid the excessive input AC current impacting the capacitance when the power is turned on, the traditional relay is often used to limit the charging current, that is, the drive is changed by controlling the power on or off of the relay. Controls the power status of the circuit. [0004] related technologies, such as figure 1 As shown, the traditional relay is in the closed state when the control circuit is working, and the traditional relay and a positive temperature coefficient temperature-...

AI Technical Summary

Problems solved by technology

[0005] (1) Since it is necessary to continuously power on to control the power supply state of the drive control circuit, it will increase the power consumption of the drive control circuit

[0006] (2) Since the load on the relay is usually an AC signal with a frequency of 50Hz and an effective value of 220V, there is a risk of leakage if the relay is continuously energized

[0007] (3) If the relay is frequently powered on and off, interference pulses such as surge signals and ripple signals will appear in the drive control circuit, which will cause some components in the drive control circuit to heat up sharply, and even be burned, which will not only affect the reliability of local devices, but also increase the thermal crosstalk in the drive control circuit

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