Pressure-sensitive overflow protection device for water boiler

Abstract

A pressure-sensitive overflow protection device for a water boiler comprises a rubber template component mounted between an upper disc-shaped valve casing and a lower disc-shaped valve casing, wherein a closed space formed between the lower disc-shaped valve casing and the template component is communicated with a water storage chamber of the water boiler through a pipe saddle; a space formed between the upper disc-shaped valve casing and a rubber template is communicated with the atmosphere; a guiding ejector rod is arranged between the rubber template and the upper disc-shaped valve casing. The pressure-sensitive overflow protection device further comprises a microswitch controlled by the guiding ejector rod. According to the invention, the relationship between the pressure intensity in a liquid and the depth is utilized to convert the pressure intensity reflecting the water level in a container into the displacement in direct proportion to the pressure intensity through the template and a spring, and the displacement is utilized to drive a valve plug to open or close the valve port so as to realize limited water inflow. The pressure-sensitive overflow protection device is mainly designed for overflow protection of the water storage chamber of the water boiler, is unlike an internal tongue tube and an external tongue tube which are mounted on the side surface of a boiler furnace, or an electrode which is adopted by the water resistance principle and needs logic circuit support, has the advantages of simple structure, stable property, strong suitability and low cost and is suitable for the water tanks of various electrothermal water boilers.

Description

technical field [0001] The invention relates to a pressure-sensitive full water protection device for a water boiler, which is used for water inlet and water level control of a water boiler or a water tank. 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 water boiler, and also increases the water boiler. cost. [0003] Later, using t...

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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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