Home appliance plug discharge test control device and control method thereof

Abstract

The invention discloses a home appliance plug discharge test control device, comprising a measuring control circuit, including: a zero crossing detection module electrically connected with a sinusoidal AC power source and a microcontroller unit and used to detect zero crossing point time of the sinusoidal AC power source and send a zero crossing point trigger signal to the microcontroller unit; the microcontroller unit which monitors the zero crossing detection module in real time, enables startup delay when receiving the zero crossing point trigger signal, and sends an action command signal to a relay driving circuit when delay time reaches a set value; a relay driving circuit which receives the action command signal and controls a relay to act, thereby cutting off a connection circuit between the sinusoidal AC power source and a power output socket; a power conversion module which convers AC power into low-voltage DC power to serve for the zero crossing detection module, the microcontroller unit and the relay driving circuit. The power output socket is disconnected upon a power peak; an oscilloscope measures a discharge curve of a home appliance plug accurately upon the power peak; measurement accuracy is guaranteed.

Description

Technical field [0001] The invention belongs to the field of household electrical appliance plug discharge testing, and in particular relates to a household electrical appliance plug discharge testing control device and a control method thereof. Background technique [0002] 1) The current national standard GB 4706.1-2005 "Household and similar electrical appliances safety Part 1: General requirements" 22.5 plug discharge test requires that the peak voltage is to cut off the power supply and test the residual voltage at 1s. In previous tests, testers manually cut off the power supply at random, and repeated the test many times in the hope that a certain time would be better, just "disconnected from the power supply at the peak of the voltage." This test is not only inefficient but also difficult to ensure the accuracy of peak power failure. At present, there are fewer special equipment for the discharge test of household appliances plugs on the market, and the price is generally...

AI Technical Summary

Problems solved by technology

This test is not only inefficient but also difficult to ensure the accuracy of peak power cuts

At present, there are few special equipment on the market for the discharge test of household appliance plugs, and the general price is relatively high, which increases the cost of equipment in the process of enterprise product development and quality control.

[0003] 2) Chinese patent application CN 207623381 U provides the peripheral circuit of the plug discharge test, but lacks the solution of the peak power failure control system, which cannot solve the problems of test efficiency and test result consistency

[0004] 3) Chinese patent application CN 204177884 U provides a scheme to use a circuit to control the peak value of the relay to cut off the power supply, but because the relay is a mechanical action switch, the delay time between the relay receiving the control signal and its execution of the cut-off action tends to vary with the relay The deviation occurs due to the increase of the number of times of use, and the accuracy of control cannot be guaranteed for long-term use

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