Non-metal injection-molded water tank electric water heater provided with water flow sensor with pressure reduction function

Abstract

The invention provides a non-metal injection-molded water tank electric water heater provided with a water flow sensor with a pressure reduction function. A water tank 8 is made of non-metal materials through an injection molding technique. The water flow sensor 4 with the pressure reduction function is installed on a water inlet pipeline of the water tank. The water flow sensor is composed of a component A and a component B. According to the component A, when water flows, an impeller or a rotor or a Hall element 4-8 is pushed by water flow to rotate, pulse signals or current signals or voltage signals and the like are output by sensing the water flow rate, an intermediate relay is pulled in, and thus a circuit is closed; and when the water supply is cut off, the circuit is opened. According to the component B, a transverse through hole is formed in the small end of a piston 4-9, and a through hole is further formed in the middle of the piston 4-9; when water inflows, water passes through the transverse through hole and then enters the water tank through the middle hole of the piston 4-9, and water is prevented from being blocked in the water inlet process; and when the water tank is filled with water or the water inlet amount is larger than the water outlet amount, the pressure in the water tank is increased, back pressure is generated by the big end of the piston 4-9, the piston is made to move, and accordingly the area of a water inlet 4-11 is decreased or even the water inlet 4-11 is closed.

Description

technical field [0001] The invention relates to a non-metal injection molding water tank electric water heater equipped with a water flow sensor with a decompression function. Background technique [0002] At present, all household electric water heaters in the world, the water inlet pipe is connected to the water source, from the water inlet to the water tank, without installing other components, can not automatically adjust the pressure in the water tank, all adopt a pressure-bearing structure, and the rated pressure is generally 0.6 Mpa, the test pressure is 1.2Mpa; this pressure will cause many difficult problems; for example, the heat expansion and contraction water tank will crack, leak, and explode under pressure, which is a problem in the world. Contents of the invention [0003] The present invention improves the existing electric water heater with a water tank made of metal materials, and the improved water heater is a non-metal injection water tank electric wate...

AI Technical Summary

Problems solved by technology

[0002] At present, all household electric water heaters in the world, the water inlet pipe is connected to the water source, from the water inlet to the water tank, without installing other components, can not automatically adjust the pressure in the water tank, all adopt a pressure-bearing structure, and the rated pressure is generally 0.6 Mpa, the test pressure is 1.2Mpa; this kind of pressure will cause many difficult problems; for example, the heat expansion and contraction water tank will crack, leak, and explode under pressure, which is a problem in the world

Images