Air quantity changeable air conditioner system air blast static pressure optimizing control method and apparatus

Abstract

The invention discloses a variable air volume (VAV) air-conditioning system air-supply static pressure optimizing and controlling method and a device thereof. A static pressure setting optimizer inspects valve location signal, namely air valve opening, of a VAV terminal in every air-conditioning area, and a VAV terminal with largest valve location signal is selected from all the valve location signals. A static pressure setting value P is changed by the static pressure setting optimizer to lead the valve location of the VAV terminal to reach or get close to the largest opening. The rotating speed of a air-supply fan in the VAV air-conditioning system is controlled by a static pressure controller according to the difference of the statistic pressure setting value P set by the static pressure setting optimizer and the static pressure value gained by an air passage static pressure transducer, so that the static pressure of the air passages can reach the setting value P. The variable air volume (VAV) air-conditioning system air-supply static pressure optimizing and controlling method of the invention can not only guarantee the comfort requirement for every VAV air-conditioning system area in a heavy load, but also save the energy consumption of the air-supply fan in a relatively light load. The device for realizing the method is simple in structure and reliable in performance.

Description

technical field [0001] The invention relates to an optimal control method for air supply static pressure of an air conditioning system, in particular to an optimal control method for air supply static pressure of a variable air volume air conditioning system. The invention also relates to a device for carrying out the method. Background technique [0002] Variable air volume air conditioning (VAV) system is an energy-saving air conditioning system. When the load of each adjustment zone (ZONE) of the VAV system changes, the variable air volume terminal (VAV Box) of each zone adjusts the air volume sent to each zone to adapt to the change of the zone load. For a general VAV air conditioning system, the air supply static pressure controller adjusts the speed of the AHU air supply fan to keep the static pressure somewhere in the air supply duct at a set constant value. There are certain defects in such a control method. Due to the constant static pressure in the air duct, the...

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Problems solved by technology

Due to the constant static pressure in the air duct, the VAV Box air valve in the area with a large load may still not meet the load demand when it is opened to the maximum, so it cannot meet the comfort requirements of the adjustment area; and when the maximum load in all VAV areas When it is less than the cooling (heat) capacity that the VAV Box can provide under the set static pressure, all the air valves of the VAV Box are not opened to the maximum, which increases the resistance of the system air duct and also increases the energy consumption of the AHU blower

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