Over-temperature protection device of alternating-current socket and electric equipment provided with over-temperature protection device

Abstract

The invention discloses an over-temperature protection device of an alternating-current socket. The over-temperature protection device comprises a power plug, a sampling circuit and a controller; at least one thermistor used for detecting temperature of a conducting metal piece in the power plug is arranged inside the power plug; the sampling circuit is used for sampling resistance of the thermistor so as to generate sampling signals; the controller is connected with the sampling circuit and controls a power supply of an alternating-current power circuit connected in the electrical equipment to be disconnected. The over-temperature protection device can have a main electric circuit of the electric equipment disconnected when the power plug or socket is over high in temperature, so that melting deformation of plastic of the socket due to high temperature is avoided, short circuit accidents of the power supply is avoided, and electrical safety is guaranteed. The invention further discloses electric equipment provided with the over-temperature protection device of the alternating-current socket.

Description

technical field [0001] The invention relates to the technical field of electrical appliances, in particular to an over-temperature protection device for an AC power socket and an electrical device with the over-temperature protection device. Background technique [0002] For old buildings, the long-term use of the socket on the wall will cause the elasticity of the metal shrapnel in the socket to become fatigued. In addition, the socket will accumulate dust inside the socket due to long-term contact with the air, especially the socket on the kitchen wall. Because of the intrusion and corrosion of oil fume, the surface oxidation of the metal shrapnel in the socket is accelerated, and these factors will cause the resistance of the contact point to increase after the socket and the plug are joined. [0003] In this way, if the surface of the metal shrapnel is dirty and oxidized, when a large current flows through the high-resistance contact point, the temperature of the contact...

AI Technical Summary

Problems solved by technology

[0003] In this way, if the surface of the metal shrapnel is dirty and oxidized, when a large current flows through the high-resistance contact point, the temperature of the contact point will rise rapidly. As a result, the temperature of the high-resistance contact point rises. When the temperature exceeds 120 degrees Celsius, the socket plastic begins to soften. If the electricity continues to be used, the temperature of the contact point continues to rise, which will eventually cause the socket plastic to melt and deform, and the metal shrapnel will break away from the original position, resulting in power short circuit accident

However, in the related art, there is no protection device for limiting excessive temperature in the power socket and the plug.

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