Pressure-sensitive limit water inlet and water shortage protection device

Abstract

A voltage-sensitive limit water inlet and water shortage protective device comprises a template assembly installed between an upper dish-shaped valve shell and a lower dish-shaped valve shell. A closed space formed between the lower dish-shaped valve shell and the template assembly is communicated with a water storage cavity of a water boiler through a pipe base. A space formed between the upper dish-shaped valve shell and a rubber template is communicated with the atmosphere. A guide ejector rod between the rubber template and the upper dish-shaped valve shell is used for controlling a microswitch. The pipe base is provided with a tee valve body, a valve plug assembly controlling the water feeding of the tee valve body is installed in the tee valve body, and the valve plug assembly is connected with the lower end of the template assembly. The voltage-sensitive limit water inlet and water shortage protective device further comprises the microswitch controlled by the guide ejector rod. The voltage-sensitive limit water inlet and water shortage protective device does not need to be installed on the water surface, is not supported by water level detection or a logic circuit, does not occupy the height space of a boiler furnace area of the water boiler, and fully integrates the water inlet protection and water shortage protection functions of an electric heat water boiler, the problem of water shortage protection does not need to be solved independently, and the voltage-sensitive limit water inlet and water shortage protective device is simple in structure, stable in performance, high in adaptability and low in cost, and is a water inlet valve applicable to various electric heat water boilers and water tanks.

Description

technical field [0001] The invention relates to a pressure-sensitive limiting water inlet and water shortage protection device for a water boiler, which is used for controlling water inlet and water level of a water boiler or a water tank and providing a water shortage protection signal. Background technique [0002] The water inlet and water level control and water shortage protection of fully automatic electric water boilers have always been the core issues that have plagued the research and development personnel of electric water boilers; on the one hand, the float-lever water inlet valve in the early years often leaked water, which caused the water boiler to often produce yin and yang water. It is unfavorable to the health of the drinker; in addition, the float-lever water inlet valve requires a large water tank installation space and a specific installation height requirement inside the water boiler, which seriously limits the shape and structural design of the electric ...

AI Technical Summary

Problems solved by technology

[0002] The water inlet and water level control and water shortage protection of fully automatic electric water boilers have always been the core issues that have plagued the research and development personnel of electric water boilers; on the one hand, the float-lever water inlet valve in the early years often leaked water, which caused the water boiler to often produce yin and yang water. It is unfavorable to the health of the drinker; in addition, the float-lever water inlet valve requires a large water tank installation space and a specific installation height requirement inside the water boiler, which seriously limits the shape and structural design of the electric water boiler, and also increases the water boiler. cost

[0003] Later, using the principle of water resistance, the electrode detects the water level, and the solenoid valve water intake method controlled by the logic circuit needs the support of the electronic circuit. The possibility of using the electronic circuit in a high-temperature and high-humidity environment will greatly increase the possibility of failure, and the failure rate will increase significantly. Improvement; because the scale on the electrode often affects the water level detection function, and cleaning the electrode requires an open installation position for maintenance operations, which brings a lot of trouble to the structural design; it also requires a higher cost

[0004] The float water inlet valve used on the electric water heater for railway passenger cars in the early days used a float ball straight-top water inlet valve. Because the water source pressure is only 45Kp, it cannot be applied to the municipal water supply pressure and cannot be promoted.

[0005] Most electric water boilers need to have a water shortage protection function. Considering various reasons such as cost and structure, the problem of water inflow should be solved at the same time; Water protection function; the electrode and logic circuit used in the water boiler that uses the principle of water resistance to control the water inlet of the solenoid valve use the control mode to detect the water level and control the heating, but it is difficult to adapt to the high temperature and high humidity environment, poor reliability, and high maintenance rate. very popular

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