Water heater with lower inner liner pressure

Abstract

The invention discloses a water heater with lower inner liner pressure. The water heater comprises an inner liner, a water inlet pipe, a water outlet pipe, a hydraulic valve and a cold water pipeline communicated with the water inlet pipe and the hydraulic valve; the water heater also comprises a first electromagnetic valve used to control the disconnection or connection of the water inlet pipe, a second electromagnetic valve used to control the inner liner to connect or disconnect with the atmosphere, a water flow detector used to detect the water flow in the cold water pipeline and a controller used to output control signals for controlling the disconnection or connection of the first electromagnetic valve and second electromagnetic valve according to the detection signals of the water flow detector. When hot water is not used, the electromagnetic valve on the water inlet pipe of the water heater of the invention is used to close the water inlet pipe all along, thus avoiding that the inner liner always bears the tap water pressure; and the electromagnetic valve on the water outlet pipe is used to ensure that the water outlet pipe is communicated with the atmosphere, thus avoiding the pressure on the inner liner owning to the volume expansion of water in heating process. When hot water is used, the water heater of the invention can avoid that hot water flows directly from themixing valve to scald human.

Description

technical field [0001] The invention relates to a water heater, in particular to a water heater for reducing inner tank pressure. Background technique [0002] Water heaters have been widely used in people's lives, and have various structures. The most common ones are electric water heaters and heat pump water heaters. The water heater usually includes an inner tank (or a water tank) for storing water, a cold water inlet pipe and a hot water outlet pipe connected with the inner tank, and the cold water inlet pipe is usually connected with the tap water pipeline. Although there is a safety valve, due to the safety valve The value of internal leakage or external leakage always has a certain range limit, so the inner tank is always under the pressure of tap water and the pressure state after the water in the inner tank is heated and expanded. The electric water heater is taken as an example for description below. [0003] Electric water heater is a kind of clean and convenien...

AI Technical Summary

Problems solved by technology

Patent ZL02115118.0 is a scheme to close the water inlet valve when the pressure exceeds a certain value, but when the user is using hot water, once the inner tank pressure exceeds the set value, the connection between the inner tank and the tap water system will be cut off, causing the user to fail to operate normally. use

And when the pressure of the inner tank exceeds the standard, the solution of the patent ZL02115118.0 can only stop the continuous increase of the pressure on the inner tank, but cannot quickly reduce the pressure on the inner tank

[0007] Although the technical solution suggested by the above-mentioned patent is also to solve the pressure problem of the inner tank of the water heater, the implementation of the solution may affect the normal water consumption of the user. In addition, the inventor found that the existing water heater still has a water mixing valve that directly discharges hot water and scalds people. serious problem

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