Accurate control method and system for multi-valve multi-mode adjustment

Abstract

The invention provides an accurate control method for multi-valve multi-mode adjustment. The method comprises the steps of setting a target temperature TSV; collecting the water outlet temperature TAV; comparing the water outlet temperature TAV with the target temperature TSV to obtain a comparison result; forming an execution instruction according to the comparison result; and receiving the execution instruction by each valve and completing the action corresponding to the execution instruction. The method has the beneficial effects that a plurality of valve loops are independent of one another, the same-direction synchronous action, the same-direction asynchronous action, the different-direction synchronous action or the different-direction asynchronous action is comprehensively executed, multiple modes are achieved, the feedback quantity of the water outlet temperature is introduced, the hysteresis of a heating system can be treated, finally, the target value can be controlled very accurately and timely, a controlled system can be more stable, the system load fluctuation is small, and the system operation is more economical and reasonable.

Description

technical field [0001] The invention relates to the field of heat exchange, in particular to a precise control method and system for multi-valve multi-mode regulation. Background technique [0002] In the existing heating plate heat exchange system, the plate heat exchanger is divided into a primary side and a secondary side, the primary side is the heat source side, and the secondary side is the heat demand side. The high-temperature water on the primary side enters the plate heat exchanger and exchanges heat with the low-temperature water on the secondary side to become low-temperature water, then flows out from the plate heat exchanger, circulates to the boiler, and becomes high-temperature water after being heated by the boiler and then enters the plate heat exchanger again. The heater is powered by a primary circulation pump, so that it circulates repeatedly to provide a continuous source of heat. In the same way, the low-temperature water on the secondary side enters ...

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Problems solved by technology

[0003] At present, a regulating valve is installed on the water inlet pipe of the primary side of the plate heat exchanger, and the outlet water temperature of the secondary side is adjusted by adjusting the opening of the valve to control the amount of high-temperature water entering the plate heat exchanger on the primary side. The valve is mainly controlled in a unified manner, and the regulation can only be adjusted synchronously, that is, multiple valves are either opened up or closed down, and there is no connection between the valves, no overall planning, and no fast and accurate control

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