Extension socket capable of protecting router through temperature alarm

Abstract

The invention discloses an extension socket capable of protecting a router through temperature alarm. The extension socket comprises a shell, a power cord which is led out from the interior of the shell and is provided with a plug, a plurality of power sockets which are arranged in the shell and connected with the power cord and can be used for supplying power to the router, a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is connected with the second temperature sensor through a comparison circuit UA, an emitter follower circuit UB, an alarm executive circuit and a buzzer which are arranged on a control circuit board; when the temperature difference of the first temperature sensor and the second temperature sensor exceeds a set value, the buzzer gives out an alarm; an alternating-current / direct-current (AC / DC) power supply circuit supplies power to the control circuit board; the control circuit board, the second temperature sensor and the buzzer are arranged in the shell; and the first temperature sensor is arranged outside the open shell. According to the extension socket, two temperature sensors are used for detecting and warning the temperature rise of the extension socket, so that the extension socket has beneficial effects of safety, reliability for use and low cost.

Description

technical field [0001] The invention relates to a row and socket for switching power supply. Background technique [0002] When the power strip (power strip) used for routers is in use, there is a certain resistance in the internal wires and copper pins. When the load current such as the current of the router increases, the temperature inside the shell will rise accordingly; in normal use Within the range, this temperature rise is acceptable. [0003] When non-standard pins are used, the copper pins have been plugged in and out for a long time, or used in a humid environment for a long time will produce an oxide layer, which will cause a large contact between the pins and the copper pins Resistance, in the case of high current, the contact resistance will generate a lot of heat, which will far exceed the range that standard components can bear. The temperature rise is very high, which will cause the following hidden dangers: [0004] When baked at high temperature for a lo...

AI Technical Summary

Problems solved by technology

[0006] As mentioned above, the high heat caused by the increase of contact resistance or other reasons does not necessarily mean that the loop current exceeds the rated current, and the overload protection device does not meet the conditions for action and cannot play a protective role.

Even if a bimetal thermostat is installed, due to the influence of the ambient temperature, it is impossible to judge whether it is caused by the ambient temperature or the temperature rise caused by excessive contact resistance and high current.

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