Water shortage protection device for water dispenser

Abstract

The invention discloses a water shortage protection device for a water dispenser. The device comprises a micro switch, a warp, an outer magnetic block, an inner magnetic block, an elastic element and a cylinder, wherein one end of the warp is movably arranged on the body of the micro switch, and the other end of the warp is a free end; the contact of the micro switch is positioned at the lower end of the warp, and the contact is switched between opened state and closed state by lifting or pressing the warp; the outer magnetic block is fixedly connected to the free end of the warp; a liquid outlet and a liquid inlet communicated with a cavity A are formed outside the cylinder; the inner magnetic block is movably arranged in the cylinder; and the elastic element is mounted in a cavity B and is compressed or loosened along with movement of the inner magnetic block. The power-up state of an electric heater in the water dispenser is controlled by adopting magnetic force and water pressure, and the effects of cutting off power in case of water absence or insufficient water pressure and electrifying the electric heater in case of water presence and sufficient water pressure are achieved. An electronic component or a control circuit is not adopted, the control principle is stable and reliable, and the application cost is low.

Description

technical field [0001] The invention relates to a protection device for preventing circuit overload, in particular to a water shortage protection device for a water dispenser. Background technique [0002] Most of the water dispensers are equipped with a water shortage protection device to prevent the electric heater from burning dry. Most of the existing water shortage protection devices use a temperature control switch or a liquid level float switch or a water level sensor associated with the control circuit to control the electric heater. This type of water shortage protection device is easy to scale when used at high temperature for a long time, resulting in reduced sensitivity. Moreover, this type of solution involves electronic components and control circuits, and the application cost is relatively high. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a water shortage protection dev...

AI Technical Summary

Problems solved by technology

It solves the problem that the electronic components of the existing water shortage protection device are easy to scale, resulting in reduced sensitivity and high application cost.

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