Electric water heater provided with water flow sensor and blow-molded water tank and capable of realizing external semiconductor or optical energy heating

Abstract

The invention discloses an electric water heater provided with a water flow sensor and a blow-molded water tank and capable of realizing external semiconductor or optical energy heating. The water tank 8 is made of a non-metallic material with an injection molding technology; the water flow sensor 4 is mounted on a water inlet pipeline of the water tank and comprises a component A and a component B; according to the component A, when water flows, water flow pushes impellers or rotors or Hall elements 4-8 to rotate, pulse signals or current and voltage signals and the like are output through induction of the water flow, an intermediate relay is pulled in, a circuit is on, and one or more groups of electric heating tubes are electrified to work; when the water is turned off, the water stops flowing, the circuit is off, and the electric heating tubes stops heating; according to the component B, a transverse through hole is formed in the small end of a piston 4-9, a through hole is further formed in the middle of the piston 4-9, in the water inlet process, water passes through the transverse through hole and enters the water tank via the hole in the middle of the piston 4-9, entering of the water is not blocked in the water inlet process, when the water tank is full of water or the water inlet amount is larger than the water outlet amount and pressure in the water tank is increased, the large end of the piston 4-9 produces backpressure, the piston shifts, and a water inlet 4-11 is turned down or even turned off.

Description

technical field [0001] The invention relates to an electric water heater with an external semiconductor or light energy heating and blow molding water tank with a 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 non-metal material blow molding process to make the water tank. After the improvement, it is an electric w...

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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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