Steam water heating unit based on PID (proportional-integral-derivative) controller

Abstract

The invention discloses a steam water heating unit based on a PID (proportional-integral-derivative) controller, which comprises a solar water supply system, a constant temperature water tank and the PID controller. A steam coil is arranged in the constant temperature water tank; a solar water inlet, a tap water inlet, a steam inlet, a drainage opening, a constant temperature water outlet and a sewage draining outlet are formed on the constant temperature water tank; an electric control valve II and an electric control valve I are respectively installed at the tap water inlet and the steam inlet; output signals are transmitted to the PID controller in time through on-line detection of a temperature sensor at the constant temperature water outlet; and the PID controller simultaneously judges whether the tap water is required to be compensated and whether steam is required to be compensated and heated, and automatically adjusts the opening of the electric control valves I and II, so as to adjust the compensation amount of the tap water and the feeding amount of steam, thus achieving the purpose of supplying water at the constant temperature. The steam water heating unit integrates two states that temperature is required to be reduced when the solar water outlet temperature is high and heating is required when the water supply temperature is insufficient, and realizes simultaneous control.

Description

technical field [0001] The invention mainly relates to the field of solar water supply, in particular to a steam hot water unit based on a PID controller. Background technique [0002] In different seasons and different weather conditions, the temperature of hot water varies greatly due to temperature, light time and other reasons. In summer, because of high temperature and long light time, solar water can reach boiling state, while in rainy, snowy and cold weather Under these conditions, the effect of solar energy is significantly weakened, and even external antifreeze heating measures are required. Therefore, solar hot water is difficult to achieve constant temperature heating. Contents of the invention [0003] The purpose of the present invention is to make up for the defects of the prior art, to provide an automatic constant temperature device for fine temperature control and continuous adjustment of solar engineering water (or other heat source water), and to so...

AI Technical Summary

Problems solved by technology

Therefore, solar hot water is difficult to achieve constant temperature heating

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