Water mixing valve and hot water circulation system including it

Abstract

The invention discloses a water mixing valve, which comprises a hot water pipe inlet, a cold water pipe inlet and a water mixing valve core. The water mixing valve core has a water mixing port and a water outlet, the mixing water port is connected with the water outlet, and the water mixing valve also includes a circulation One end of the circulation pipe is connected to the inlet of the hot water pipe, and the other end of the circulation pipe is connected to the inlet of the cold water pipe. There is a one-way valve in the circulation pipe, which can lead the inlet of the hot water pipe to the inlet of the cold water pipe in one direction. It can be moved between the first position and the second position; in the first position, the mixing valve core does not interfere with the one-way valve, and the one-way valve leads the inlet of the hot water pipe to the inlet of the cold water pipe in one direction, and the mixing port is connected to the hot water. The pipe inlet is separated from the cold water pipe inlet; in the second position, the water mixing valve core closes the one-way valve, and the water mixing port is communicated with the cold water pipe inlet and / or the hot water pipe inlet. With the water mixing valve disclosed in the invention, the water mixing valve integrates a one-way valve for a hot water circulation pipeline, and the one-way valve is closed when water is used, and the water heater will not be started, thereby reducing the waste of resources.

Description

technical field [0001] The invention relates to the field of water mixing valves, in particular to a water mixing valve and a hot water circulation system comprising the water mixing valve. Background technique [0002] In the prior art, when the circulating water heater is installed, a check valve needs to be installed at the most remote water point to prevent cold water from flowing back into the hot water pipeline. There are two problems with this setup. [0003] First of all, the one-way valve is set at the farthest end. When the cold water at the farthest water point is used, the one-way valve cannot be closed, and part of the cold water flows out through the one-way valve through the water heater, causing the water heater to start, causing unnecessary waste. [0004] Secondly, the separate setting of the one-way valve requires disconnection of the water circulation pipeline for installation, the installation process is cumbersome, and it is easy to cause water leakage...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a water mixing valve and a hot water circulation system including it in order to overcome the disadvantages in the prior art that the water heater starts when the most remote cold water is used and the one-way valve is difficult to install

Images