Air-conditioning control technique with variable air quantity based on enthalpy value control

Abstract

The invention relates to a novel air-conditioning control technique with variable air quantity based on enthalpy value control, which comprises a pressure relevant type end device control part and a fuzzy PID control part. The technique concretely comprises a PID controller, a parameter self-calibration module, a fuzzy database, an air return valve, an air delivery valve, an air-conditioning end with variable air quantity, a humiture sensor and an air enthalpy value operation module. The humiture sensor collects indoor humiture signals Tr and phi r, the indoor humiture signals are transformedinto an executable standard electric signal by a variable delivery link, the electric signal is delivered into the air enthalpy value operation module, an enthalpy value representing indoor humiture properties is obtained by calculation, and the enthalpy value is compared with a set enthalpy value. After comparison, a bias and a bias change rate are regulated and calibrated by the fuzzy control module, and a timely and accurate control signal is sent to the air delivery valve or the air return valve positioned at the end, thereby changing the air quantity so as to achieve the purpose of regulating the humiture in a room. The invention has intellectualized control and shorter response regulation time and realizes the purpose of energy saving of an air-conditioning host machine.

Description

technical field [0001] The invention relates to a variable air volume air conditioning control technology, in particular to a variable air volume air conditioning control system that changes the air supply at the end of the air outlet based on enthalpy control, belongs to the field of building environment equipment and control technology, and is a new energy-saving air conditioner Control System. Background technique [0002] The variable air volume air conditioning system is an energy-saving air conditioning method. Its terminal device can change the air supply volume according to the actual load change of the controlled air conditioning room, which means that the cooling (heat) supply of the entire air conditioning system The load can be automatically transferred between all orientations of the building as the load changes, making full use of the uneven load in all orientations of the building at the same time, reducing the total load of the entire system, so that the equi...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to develop an enthalpy-based control system based on the deficiencies of the pitot tube-based wind speed measuring terminal variable air volume device, whose wind speed measuring device is easy to block, high energy consumption, and the wind speed at the inlet air port is required to be high. The new variable air volume terminal device control technology can further reduce the wind speed in the air duct of the air conditioning system, reduce the failure rate of the pitot tube wind speed measuring device, etc., and improve the enthalpy value of the cooling coefficient of the variable air volume air conditioning refrigeration system. Controlled variable air volume terminal energy saving device

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