A plasma air purification method suitable for sterilizers

Abstract

The invention relates to a plasma air purification method for sterilizers. A casing is included; an air inlet and an air outlet are formed in the casing; an electrostatic dust collection filter screen is arranged at the air inlet; an adsorption device with filtering holes is arranged at the air outlet; a plasma generation chamber is arranged inside the casing between the air inlet and the air outlet; a plasma generation device is mounted in the chamber, and at least includes two parallel comb-shaped plate electrodes; a discharge zone is formed between the adjacent plate electrodes; one of the adjacent plate electrodes is connected with a power source, and the other of the adjacent plate electrodes is connected with the ground; the comb-shaped plate electrode near to the casing wall in the plasma generation device is connected with the inner wall of the casing, at the end near to the air inlet, through a guide plate. Through the arrangement of the plasma generation device, air entering a sterilization room can be reliably sterilized and purified, the clearance between the adjacent comb-shaped plate electrodes is big, and the air return ratio is high; besides, diameters of the filtering holes of the air inlet and the air outlet are well adapted, the disassembly and cleaning are easy, and the service cycle is long.

Description

technical field [0001] The invention relates to a plasma air purification method suitable for a sterilizer, which is used for a sterilizing device to feed sterile air into a sterilizing chamber during a sterilizing cycle to avoid contamination of sterilized items. Background technique [0002] No matter it is steam sterilization equipment or plasma sterilization equipment, it is necessary to return air to the sterilization chamber during the sterilization cycle. The air filter made of filter element has the following defects: the diameter of the filter hole is not more than 0.3 μm, multi-layer, the time of filtering air is long, the efficiency is low, and it is easy to block; The key parameters of filtration in the process are monitored, so the integrity test of the filter should be carried out before and after each filtration sterilization, that is, the bubble point test or pressure maintenance test or gas diffusion flow test to confirm that the filter membrane is in the pr...

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Problems solved by technology

[0002] No matter it is steam sterilization equipment or plasma sterilization equipment, it is necessary to return air to the sterilization chamber during the sterilization cycle. The air filter made of filter element has the following defects: the diameter of the filter hole is not more than 0.3 μm, multi-layer, the time of filtering air is long, the efficiency is low, and it is easy to block; The key parameters of filtration in the process are monitored, so the integrity test of the filter should be carried out before and after each filtration sterilization, that is, the bubble point test or pressure maintenance test or gas diffusion flow test to confirm that the filter membrane is in the process of sterilization and filtration The effectiveness and integrity of the system, the operation is complicated and cumbersome, and the service life of the sterilizing filter is short, requiring frequent replacement of the filter element and cleaning of the shell, while the steam sterilizer is only suitable for warm sterilization equipment, this device is only for the filter Sterilization of the filter element does not sterilize the required air. This method is easy to cause deformation of the filter element, resulting in filter failure, and high pressure occurs during the steam sterilization cycle. It is necessary to modify the original air filter structure to make it able to withstand high pressure. , increase cost, increase energy consumption

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