External rapid-heating type electric water heater provided with water flow sensor with pressure reduction function and metallic water tank

Abstract

A metal water tank with a decompression water flow sensor is equipped with an external fast-heating electric water heater. The water tank 8 is made of metal materials, and a water flow sensor 4 with a decompression function is installed on the water inlet pipeline of the water tank. There are two A and B Functional components: Part A, when there is water flow, the water flow pushes the impeller or rotor or Hall element 4-8 to rotate, and outputs pulse signal or current, voltage and other signals through the induction of water flow, so that the intermediate relay is closed, When the circuit is turned on, one or more sets of electric heating tubes are energized to work; when the water is turned off, the water stops flowing, the circuit is disconnected, and the electric heating tubes stop heating; in part B, there is a horizontal through hole at the small end of the piston 4-9, and there is also a through hole in the middle. Hole, when water enters, water passes through the transverse hole, and enters the water tank from the middle hole of piston 4-9. When water enters, it does not block the entry of water. When the water tank is filled with water or the water intake is greater than the water output, the pressure in the water tank increases When discharging, the large end of the piston 4-9 produces a back pressure, which causes the displacement of the piston, and even closes the water inlet 4-11; when discharging water, the water inlet is repeatedly opened; thereby the pressure in the water tank can be automatically adjusted. At the same time, an external fast heating device 16 is installed in the outlet pipeline of the water tank 8 .

Description

technical field [0001] The invention relates to a metal water tank external fast heating electric water heater with a decompressed water flow sensor. 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 that uses metal materials to make water tanks. After the improvement, it is an external fast-heating electric water heater with a decompressed water...

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

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