Positive and negative pressure rapid switching control system and method for ship cabin

Abstract

The invention relates to a positive and negative pressure rapid switching control system and method for a ship cabin, and the system and the method are technically characterized in that the positive and negative pressure rapid switching control system for the ship cabin is built, thereby achieving the building of a positive pressure environment and a negative pressure environment of a specific region of the ship cabin, and the automatic and rapid switching between the positive and negative pressures. By utilizing the characteristic that the air supply amount of the variable-frequency air feeder changes along with the working frequency, the requirements of different area areas and air exchange times can be met, one set of system can meet the requirements of various rooms, universality is achieved, and the design workload is greatly reduced. By adjusting the exhaust air rate of the variable-frequency exhaust fan, pressure control over a specific area is achieved, the previous adjusting mode that a fixed-frequency fan and an adjustable valve are combined is changed, an executing mechanism is omitted, the reliability of the system is improved, and the complexity of system installationis reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring and control, in particular to a positive and negative pressure fast switching control system and method for ship cabins. Background technique [0002] The positive and negative pressure in the room is usually relative to the static pressure value outside the room, that is, when the pressure value in the room is greater than the external static pressure value, the room is positive pressure; when the pressure value in the room is lower than the external static pressure value Pressure value, the room is negative pressure. When the room is under positive pressure, from the perspective of air circulation, the outside air cannot flow into the room, so the positive pressure room is suitable for protection, such as clean workshops, laboratories, general operating rooms, etc.; otherwise, when the room is In the case of negative pressure, the air in the room will not leak out, so the negat...

AI Technical Summary

Problems solved by technology

Such a pressure control system has poor applicability, and repeated design is required for different types and areas of ship cabins, which increases the workload of designers

[0005] For the pressure detection of the ship cabin, the differential pressure sensor is used as the feedback link, and the differential pressure feedback has a certain lag. At the same time, if the differential pressure sensor fails, the system will be out of balance.

[0006] When the ship cabin pressure control system is in use, for the detection of the purification unit, the time accumulation method was used as the criterion in the past, and whether to replace the purification unit is determined according to the use time of the purification unit, which has a high probability of misjudgment

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