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Voltage peak value judgment device, power-off device and power-off method

A technology of voltage peak value and judgment device, applied in circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc., can solve the problems of inability to accurately capture the voltage peak value, poor safety performance, low efficiency, etc. The effect of testing equipment resources and improving efficiency

Inactive Publication Date: 2020-06-23
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The embodiment of the present invention provides a voltage peak judging device, a power-off device and a method to solve the problems that the existing voltage peak power-off means cannot accurately capture the voltage peak value, low efficiency, and poor safety performance

Method used

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  • Voltage peak value judgment device, power-off device and power-off method
  • Voltage peak value judgment device, power-off device and power-off method
  • Voltage peak value judgment device, power-off device and power-off method

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Embodiment Construction

[0036] The following description and the accompanying drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of the embodiments herein includes the full scope of the claims, and all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another element without requiring or implying any actual relationship or order between these elements. In fact the first element can also be called the second element and vice versa. Furthermore, the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion such that a structure, means or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed elements, or also elements inherent in th...

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Abstract

The invention belongs to the technical field of electrical detection, and discloses a voltage peak value judgment device, which comprises: a power supply device for supplying power to a detected appliance; a zero-crossing detection circuit for detecting the zero-crossing moment of the output voltage of the power supply device and generating a zero-crossing detection signal, and a timing device which is used for timing according to the set duration from the rising edge or the falling edge of the zero-crossing detection signal. The zero-crossing detection circuit is used for detecting the zero-crossing moment of the output voltage of the power supply device, and the preset fixed duration is delayed from the zero-crossing moment, so that the voltage peak moment can be accurately grabbed. Theinvention also discloses a voltage peak power-off device and a voltage peak power-off method.

Description

technical field [0001] The invention relates to the technical field of electrical detection, in particular to a voltage peak judging device, a power-off device and a method. Background technique [0002] Article 22.5 of Part 1 of the safety standards for household and similar electrical appliances such as GB4706.1 and IEC60335.1 stipulates: "Appliances intended to be connected to the mains by means of a plug shall be constructed so that they are There is no danger of electric shock from charged capacitors when touching the prongs of the plug". GB4706.1-2005 stipulates that capacitors with a rated capacitance of no more than 0.1μF (capacitors with a rated capacitance of less than 0.1μF specified in IEC603351-2016) are not considered to cause electric shock hazards. Compliance may be checked by the following test: supply the appliance with a rated voltage, then place any of its switches in the "OFF" position, so that the appliance is disconnected from the supply at the peak o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R19/175H02H3/02
CPCG01R19/0084G01R19/175H02H3/021G01R19/00H02H3/02
Inventor 孙志伟刘苏鄂徐勤耀孙利民朱百发
Owner QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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