Backwater control method used for hot-water project

Abstract

The invention discloses a backwater control method used for a hot-water project and belongs to the field of hot-water project control. The backwater control method includes acquiring water temperature of a thermal-storage water tank and temperature of a backwater pipe through a temperature sensor respectively; responding the water temperature of the thermal-storage water tank and the temperature of the backwater pipe, and comparing the temperature of the backwater pipe with set backwater temperature; judging whether to start backwater control or stop backwater or perform cyclic backwater or not; starting backwater when the interior temperature of the thermal-storage water tank is higher than the backwater temperature and the temperature of the backwater pipe is lower than the set temperature and stopping backwater until the interior temperature of the backwater pipe is higher than the temperature; and starting backwater by a device according to a set time period when the interior temperature of the thermal-storage water tank is lower than the backwater temperature and the interior temperature of the backwater pipe is lower than the set temperature, and stopping cyclic backwater by the backwater device until the interior temperature of the backwater pipe is higher than the set temperature. By the use of the backwater control method, excessively-low interior temperature of the backwater pipe is overcome, and electricity waste caused by continuous backwater is avoided.

Description

technical field [0001] The invention relates to the field of hot water engineering control, in particular to a return water control method for hot water engineering, which is suitable for the control of hot water engineering. Background technique [0002] When engineering or domestic water tanks provide hot water, due to long-term non-use, the water temperature in the water supply pipe will be too low to be usable. When users need to use it, they must first release the cold water in the water supply pipe to obtain suitable hot water. , This has just caused waste, and the return water is exactly to send the cold water in the water supply pipe back in the water tank for reheating, thereby realizing the reuse of the cold water in the water supply pipe. [0003] At present, the return water methods used in the market are mainly divided into continuous return water and temperature return water. Continuous water return means that the water in the return pipe is continuously sent ...

AI Technical Summary

Problems solved by technology

Continuous water return means that the water in the return pipe is continuously sent back to the water tank, which will consume a lot of electricity, and the hot water will exchange heat with the outside when passing through the return pipe, reducing the heating speed of the water tank

The common control method for temperature-controlled return water is: when the temperature in the return water pipe is lower than the return water temperature, the return water is started; when the temperature in the return water pipe is higher than the return water temperature, the return water is stopped. The waste caused, but when the temperature of the water tank has not reached the return water temperature, the water temperature in the return water pipe will inevitably be lower than the return water temperature. In this way, the device is still in the return water but cannot reach the required return water temperature. State, so there is still a waste of electricity, and will accelerate the heat loss of the water tank

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