Water heater cold water backflow device and backflow control method

Abstract

The invention discloses a water heater cold water backflow device and a backflow control method. The cold water backflow device comprises an intelligent control module, a return water pump, a temperature sensor, an electromagnetic valve, a faucet, a hot water pipe, a cold water pipe and a tee pipe; the cold water backflow device and a water heater form a household hot water system jointly; the return water pump is connected between the hot water pipe and the cold water pipe at the faucet end; the temperature sensor is arranged on the inner wall of a water pipe connected with the hot water pipe; the electromagnetic valve is connected with a water outlet of a faucet; the intelligent control module detects the on-off state of a hot water valve of the faucet and the water temperature of the hot water pipe; and the return water pump and the electromagnetic valve are controlled to make cold water left in the hot water pipe return to the water heater through the cold water pipe or normally besupplied. The problem that the distance between a water heater and a water use point (a faucet) in a household hot water system is long, when hot water is used, cold water left in the hot water pipeis discharged firstly and waste is caused is solved, construction and mounting are easy, and use operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of smart home appliances, and in particular relates to a cold water return device and a cold water return control method for a water heater. Background technique [0002] In the domestic hot water system, the distance between the water heater and the water point (faucet) is generally 3 to 5 meters, and the distance for large houses is even more than 10 meters. When turning on the water heater, it is necessary to wait for 2 to 5 minutes until the cold water in the hot water pipe between the water heater and the faucet is exhausted before hot water flows out, which leads to a large amount of waste of water resources. [0003] In order to solve the waste problem of cold water remaining in the hot water pipe, there is currently a cold water return device installed in the domestic hot water system. The device lays a return pipe and a return water controller between the remote hot water faucet and the tap water i...

AI Technical Summary

Problems solved by technology

This cold water return device is not only inconvenient to install due to the need to increase the return pipe from the remote water point to the water heater, but also needs to manually open the return water controller every time it is used, which is not convenient for actual use. Therefore, the cold water return device The unit is not widely used in domestic hot water systems

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