RU1803127C - Method and device for gas sterilization - Google Patents

Abstract

Usage: medicine. SUMMARY OF THE INVENTION: the method includes preparing a sterilizing mixture of gases and feeding it into a previously evacuated chamber with processed products. The mixture is prepared by evaporation of liquefied gases. One gas is ejected by another. The device includes a sealed chamber, cylinders, a vacuum pump and pipelines. The device is equipped with an ejector and a heat exchanger-evaporator, feeding a mixture of gases into the chamber. The cylinders are connected to the ejector through an evaporator. 1 ill. e

Description

The invention relates to medical equipment, in particular to sterilization of medical devices, for example disposable syringes.

The purpose of the invention is to expedite the process and increase the usability.

This goal is also achieved by the fact that the gas sterilization device, including a sealed chamber, cylinders, a vacuum pump and pipelines, is equipped with an ejector and a heat exchanger-evaporator for supplying a mixture of gases into the chamber, the cylinders being connected to the ejector through an evaporator.

The method is carried out as follows.

Example. The items to be processed are placed in a chamber and the latter is evacuated.

Then, gas is introduced into the chamber of the sterilizing mixture - ethylene oxide and

carbon dioxide, which is prepared directly in the feed process by evaporating gases in a liquefied state, while one gas is ejected by the other.

The drawing shows a diagram of a gas sterilization device according to the proposed method.

The device comprises a sealed chamber 1, a vacuum unit-pump 2, a unit for preparing and supplying a sterilizing gas mixture 3, including cylinders 4 and 5 with liquefied mixed gases, connected through a heat exchanger-evaporator 6 and an ejection mixer 7 (ejector) with a mixture supply pipe 8 to camera 1. with products placed in it 9.

Installation works as follows.

Liquefied gases, such as ethylene oxide and carbon dioxide, are supplied to the heat exchanger-evaporator 6, after which -

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ejection mixer 7. In the ejector mixer 7, ejection of a gas supplied with a lower pressure (ethylene oxide), a gas supplied with a higher pressure (carbon dioxide), and mixing in a predetermined ratio. After the ejection mixer 7, the sterilizing gas mixture enters through the pipe 8 into the airtight chamber 1 previously evacuated by means of a vacuum unit 2, where the products 9 are sterilized.

The preparation of a sterilizing gas mixture directly in the process of feeding it into the chamber reduces the overall sterilization time. Storage of gases in a liquefied form prior to mixing reduces production areas and increases gas reserves. Mixing gases by ejecting one gas to another simplifies the process.

Introduction to the gas sterilization unit gas preparation unit

increases the reliability and safety of operation of the installation, as well as simplifies maintenance.

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Claims (2)

1. A method of gas sterilization, comprising preparing a sterilizing gas mixture and feeding it into a pre-evacuated chamber with processed products, characterized in that, in order to speed up the process, the mixture is prepared by evaporation of liquefied gases, while one gas is ejected by the other. 2. A device for gas sterilization, including a sealed chamber, cylinders, a vacuum pump and pipelines, characterized in that, in order to accelerate the process and improve ease of use, the device is equipped with an ejector and a heat exchanger-evaporator for supplying a mixture of gases into the chamber, and the cylinders are connected to ejector through the evaporator.