Air-conditioning water system pump-valve integrated control device and control method

Abstract

The invention relates to the technical field of central air-conditioning control systems, in particular to an air-conditioning water system pump-valve integrated control device and a control method. The device comprises a controller, and the controller comprises an energy valve information obtaining unit and a most unfavourable loop selecting unit which are connected in sequence; the energy valveinformation obtaining unit is connected with at least one intelligent energy valve to obtain the valve location opening values of the intelligent energy valves, and the most unfavourable loop selecting unit determines the most unfavourable loop according to the valve location opening values of all the intelligent energy valves; a pump package variable frequency controller calculates adjustment frequency according to the valve location opening value of the most unfavourable loop and sends the adjustment frequency to a motor of a water pump. Based on the most unfavourable loop, the water pump iscontrolled in a variable frequency mode, the opening value of the most unfavourable loop reaches the reasonable opening value range, the steps are repeated periodically so that all the loops can be kept in the reasonable opening valve range, and the optimal energy-saving effect is achieved.

Description

technical field [0001] The invention relates to the technical field of central air-conditioning control systems, in particular to an air-conditioning water system pump-valve integrated control device and control method. Background technique [0002] As a large-scale refrigeration or heating equipment, central air-conditioning has been widely popularized in our country. General central air conditioning system such as figure 1 As shown, it includes a water pump 60, a water supply main pipe 10, and a return water main pipe 20. The water supply main pipe has a water supply branch pipe 11, and the water supply branch pipe 11 is connected to the air conditioner terminal 30 (including the combined air conditioning box AHU, air conditioning box PAU, fan coil unit FCU, etc. Any one of the water inlet ports), the water return main pipe 20 has a water return branch pipe 21, the water return branch pipe 21 is connected to the water outlet port of the air conditioner terminal 30, and th...

AI Technical Summary

Problems solved by technology

At present, most central air-conditioning systems use constant flow water supply or control the water supply according to the temperature difference or pressure difference of the water supply and return pipelines. When the load is low, the water supply may be too large, resulting in energy waste.

Moreover, it is possible that some loops have exceeded the rated water supply, while some loops are still in the state of underflow. Increasing or reducing the water volume through the water pump cannot reduce the water supply of the loop exceeding the rated water supply, nor can the underflow state The loop increases the water supply, so that the water supply of each loop cannot be optimally controlled, which can not meet the basic load requirements, and there is waste, and the goal of energy saving cannot be achieved.

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