Instantaneous water heater

Abstract

The invention relates to an instantaneous water heater. The instantaneous water heater comprises a water inlet pipe, a heating barrel, a water outlet pipe and a water outlet switch, wherein a one-wayvalve I is arranged on the water inlet pipe; the water outlet pipe is a coaxial two-channel water pipe and comprises an outer pipe and an inner pipe; the outer pipe is communicated with the heating barrel and the water outlet switch; one end of the inner pipe is a free end and stops at the water outlet switch; the other end of the inner pipe runs out of the outer pipe at the heating barrel to be connected with the water inlet pipe and the connection is located between the one-way valve I and the heating barrel; and a water pump and a one-way valve II are arranged on the pipeline, of the innerpipe, which is connected to the water outlet pipe and the water inlet pipe, and used for coordinately controlling water to flow back from the water outlet pipe to the water inlet pipe. When used, theinstantaneous water heater achieves the effect that when the water outlet switch is turned on, water flowing out is hot water, so that waiting is not needed and the water waste is reduced.

Description

technical field [0001] The invention relates to a water heater, and specifically discloses an instant water heater. Background technique [0002] Water heaters can be divided into gas water heaters, electric water heaters and solar water heaters according to different heating methods. However, whether it is gas water heaters, electric water heaters or solar water heaters, when hot water is needed in the kitchen or bathroom, there is a long distance from the water heater to the kitchen or bathroom. Long pipeline, the cold water that exists in the pipeline must first be let out to have hot water to flow out, wasted water resource greatly and increased the waiting time of people before bathing. [0003] Chinese patent 2014106013289 discloses a zero cold water instant hot gas water heater which is composed of a gas water heater, an instant heater, a water mixing valve, a temperature sensor, a nozzle, a pipeline and corresponding control devices. The system is a zero cold water i...

AI Technical Summary

Problems solved by technology

The gas water heater is heated twice, that is, it is heated in the gas water heater first, and then enters the outlet of the hot water pipe. If the temperature of the water outlet is not reached, it will continue to be heated by the instant heater until the water reaches the temperature. The disadvantage is that it consumes resources. And the waiting time is long, and hot water cannot be used immediately

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