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A socket for eliminating electric sparks

A technology of electric sparks and sockets, applied in the direction of circuits, electrical components, parts of connecting devices, etc., can solve problems such as electrical hazards, large starting current, and interference with normal operation of the power grid, so as to avoid erosion and burnout, avoid electric sparks, The effect of eliminating the harm of surge current to electrical appliances

Inactive Publication Date: 2016-12-07
STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the starting current of electrical products is generally relatively large, the surge current generated will cause harm to the electrical equipment itself and interfere with the normal operation of the power grid.

Method used

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  • A socket for eliminating electric sparks
  • A socket for eliminating electric sparks
  • A socket for eliminating electric sparks

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] figure 1 It is a front-end rectification circuit of an existing switching power supply. figure 1 Among them, the 220V AC is connected to the rectification circuit through the fuse F, and the bridge full-wave rectification circuit is composed of D1, D2, D3, and D4 rectification diodes, and the capacitor C is a filter capacitor. At present, most power supplies use switching power supplies, such as laptop power supplies and mobile phone charging power supplies. The general power is tens of watts, the rated current is about several hundred milliamps, and the equivalent resistance is about 1K. For example, when the adapter power plug of a laptop is inserted into the power socket, there will be a popping sound accompanied by electric sparks, because the filter capacitor is generally large, and a large current will be generated at the moment the filter...

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Abstract

The invention relates to a socket for eliminating electric spark. The socket comprises a power supply socket and a socket arranged on an appliance for getting electricity. The socket can be applied to getting electricity by an appliance in a flammable and combustible occasion or an electricity getting design of an explosion-proof electric apparatus. The socket is characterized in that an access of at least one group of socket contacts is provided with a first socket contact, a second socket contact and a current-limiting resistor, and the second socket contact is connected with the first socket contact by virtue of the current-limiting resistor. Furthermore, the current-limiting resistor adopts a positive or negative temperature coefficient thermistor. The socket has the beneficial effects that firstly, as a power supply socket, electric spark generated by inserting or extracting a plug can be eliminated, the contacts are prevented from being eroded and brunt, and the socket is suitable for being used in an explosion-proof occasion; secondly, as the electricity getting socket of the explosion-proof electric apparatus, and electric spark generated by inserting or extracting a power supply plug can be effectively prevented.

Description

technical field [0001] The invention relates to a socket for eliminating electric sparks, including a power socket and a socket arranged on an electrical appliance for taking power, which can be applied to take electricity for electric appliances in inflammable and explosive places, or be used for the design of taking electricity for explosion-proof electrical appliances. Background technique [0002] The moment the electrical plug is inserted into the socket, due to the existence of a large starting current, sparks and heat will be generated at the contact point. With the stable contact between the plug and the socket contacts, the sparks and heat will disappear. When the electrical plug is pulled out When using a socket, often due to the existence of the load, sparks will also be generated at the moment when the contacts are separated. Due to the existence of electric sparks, the socket contacts and plug contacts of the socket will be continuously eroded, and in severe case...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R13/66H01R13/68H01R13/10
Inventor 焦庆丽王伟丁立梅
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY
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