Electrical protection device for electric appliance and electric appliance

A technology for electrical protection devices and electrical equipment, applied in the direction of automatic disconnection emergency protection devices, emergency protection circuit devices, circuit devices, etc., can solve problems such as invalid grounding of electrical equipment, electric shock injuries, poor electrical connections, etc., and achieve optimal solutions Efficiency, effective treatment effect

Inactive Publication Date: 2018-06-19
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If people touch the metal shell of electrical equipment, it is easy to cause electric shock injury
In addition, the residential power grid in some rural areas is not grounded, which makes the grounding of electrical equipment invalid. If people touch the shell with strong current leakage, it will inevitably cause electric shock injury.
[0004] The current zero-fire electrical protection circuit usually only detects electrical faults in the neutral wire, live wire, and ground wire (including leakage, arc fault, overcurrent, poor electrical connection, aging line, insulation damage, live wire, grounding invalid, etc.) When the incident occurs, the countermeasures of cutting off the power supply are taken without further treatment, resulting in the failure to solve the accident in a timely and effective manner

Method used

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  • Electrical protection device for electric appliance and electric appliance
  • Electrical protection device for electric appliance and electric appliance
  • Electrical protection device for electric appliance and electric appliance

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Embodiment Construction

[0050] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0051] figure 1 A schematic diagram of an embodiment of an electrical protection device for electrical equipment of the present application is shown.

[0052] As shown in the figure, the electrical protection device includes an electrical fault detection unit 10 , a control unit 300 , an electrical protection unit 400 , and a fault information proces...

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Abstract

The application provides an electrical protection device for an electric appliance and the electric appliance. The electrical protection device comprises a ground wire fault detection circuit, a zeroline and live wire fault detection circuit, a control unit, an electrical protection unit and a fault information processing unit, wherein the ground wire fault detection circuit is connected betweena ground wire and a zero line and used for detecting whether the ground wire has an electrical fault, the zero line and live wire fault detection circuit is connected between the zero line and a livewire and used for detecting whether the zero line and / or the live wire has the electrical fault, and when the ground wire fault detection circuit and / or the zero line and live wire fault detection circuit detect(s) the electrical fault, the control unit controls the electrical protection unit to turn off a power supply and controls the fault information processing unit to process electrical faultinformation. According to the scheme, when the electrical faults of the wire, the zero line and the live wire are detected, the power supply is controlled to be cut off, the fault information is processed, and troubleshooting is more timely and effective.

Description

technical field [0001] The present application relates to the field of electrical equipment, in particular to an electrical protection device and electrical equipment. Background technique [0002] According to the requirements of the national standard, electrical equipment (such as air conditioners, refrigerators, washing machines, etc.) must be grounded. When the insulation of electrical equipment products is damaged, the metal casing may be charged. Once the human body touches the metal casing, the human body will form a loop between the metal casing and the earth, that is, current will flow through the human body. If it is properly grounded, because the grounding resistance of the equipment is usually less than 0.1Ω, most of the current is bypassed by the grounding resistance to avoid electric shock damage caused by large current passing through the human body. [0003] However, the grounding resistance of the ground wire of the power supply grid is not ideal at present...

Claims

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Application Information

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IPC IPC(8): H02H3/32H02J13/00
CPCH02H3/32H02J13/0006Y02B70/30Y04S20/242
Inventor 董明珠方祥建朱云青吴斌刘光有梁博程新庆
Owner GREE ELECTRIC APPLIANCES INC
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