Positive pressure air supply system and control method

Abstract

The invention discloses a positive pressure air supply system and a control method. The system comprises a positive pressure air supplying machine, an intelligent control unit and n air supply units of the same structure. The method comprises the steps that the elevator front chamber pressure and the staircase pressure are set through the intelligent control unit; during pressurization air supply, the air pressure of a staircase is larger than the air pressure of the elevator front chamber, and the air pressure of the elevator front chamber is larger than the air pressure of an aisle; when a fire control signal exists, a positive pressure air supply machine is controlled to work, the difference value between a detection pressure numerical value of a staircase pressure sensor and the barometric pressure is obtained through the intelligent control unit, and the maximum value of the difference value is taken as a reference signal to be compared with the staircase pressure set value, so that the opening degree of an electric bypass pressure-relief valve is adjusted to enable the actually-detected staircase pressure value to approach to the set value; and when the fire control signal is eliminated, the intelligent control unit controls the positive pressure air supplying machine to stop working. The system is in communication connection with a building or other control systems, and detection and control are convenient.

Description

technical field [0001] The invention relates to a positive pressure air supply system and a control method, belonging to the technical field of building air supply. Background technique [0002] The pressurized air supply system is mainly composed of a positive pressure blower installed on the roof or part of the roof, a positive pressure air supply valve and its electrical interlocking control device installed in each floor (also can be set on a separate floor) in the smoke-proof stairwell, fire protection front room, Coupled with the building air supply shaft, it constitutes a complete building smoke prevention system. [0003] When a certain floor catches fire, open the positive pressure air supply valve on the fire floor and the adjacent upper and lower floors, and then start the corresponding positive pressure air blower to form a positive pressure in the smoke-proof stairwell and the fire-fighting front room to prevent the smoke from entering and provide safety for the...

AI Technical Summary

Problems solved by technology

Manual control is prone to large errors, and the pressure relief valve will age and rust after long-term use, which cannot meet the accuracy requirements of actual control

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