JPS5951852A - Steam pasturizer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam sterilizer that sterilizes objects to be sterilized by filling the chamber with high-pressure saturated steam.

In this type of steam sterilizer, when the object to be sterilized is cold, the steam causes dew condensation. Therefore, in general, a jacket 11 is formed around the outer periphery of a chamber on the 7th floor that houses the objects to be sterilized to form a double-chain sterilizer, and steam is also heated in the jacket space around the outer periphery by controlling the light. The items to be sterilized to be stored during drying can be dried by radiant heating, and the inside of the double cans is filled with saturated steam by removing air from inside the double cans in advance using an empty pump C2. However, if the air removal is incomplete, it will turn into unsaturated steam and sterilization will be incomplete.For example, if the vacuum between the inner and outer cans is unbalanced, one chamber will be filled with saturated steam and the other chamber will be filled with saturated steam. When air remains in the jacket space, which is the outer can, and it is filled with unsaturated steam, and the temperature is lower than the chamber, the steam condenses inside the chamber and creates a drain. As a result, the amount of steam used increases, and this also causes inconvenience as it causes the objects to be sterilized to get wet.Also, the internal chamber is filled with saturated steam, and during sterilization, saturated steam at a higher temperature than the chamber is poured into the jacket space of the outer can. When the chamber is full, the saturated steam in the chamber turns into superheated steam, resulting in incomplete sterilization of the objects to be sterilized and adverse effects such as aging of the objects. Therefore, during sterilization, the temperatures of the inner and outer cans must be the same.

The present invention has been made in view of these points, and one embodiment thereof will be explained below with reference to the drawings. Items to be sterilized! It is a double-can type sterilizer that performs steam sterilization, and has an inner chamber (2: sterilization chamber 13 that stores the items to be sterilized), and an opening/closing lid (4) on the front opening! It is designed to be airtightly closed. A jacket space (5) serving as an outer can is formed around the outer periphery of the chamber.

(6) is a steam supply pipe that allows high-temperature, high-pressure saturated steam to flow into the chamber 121 and the jacket space (5), which divides the at can and jacket space into two equal parts.
+4 is connected to each bottom side area C through the opening/closing valve (71+7F), and the other side area is connected to a discharge pipe +91191 having a steam trap +s+ +sf to discharge the drain of the steam that fills, and the above-mentioned The chamber (21) is filled with steam and an exhaust valve is provided in the exhaust pipe (9) to actively discharge the steam.

111) vacuums the inside of the chamber 121 and +fil Jarzuto Sorakawa 1 (use) with r6b empty pump, Teishin 2s pump IVrJ discharge W (91 (91 has on/off valve++ 21 t+ i? The vacuum exhaust pipe f131, which is connected to the Makabe pump 1111 and the on-off valve o21++j, is connected through the
+8i +1 light and bypass connected.

The operation of a steam sterilizer with a refusal configuration will be explained.

First, request inside jacket space (5) 1N7r t'=E
7Ti, the on-off valve (1) of the vacuum exhaust pipe 031'
Open the G circuit and drive the vacuum pump till for the desired time.
Equalize the YR pressure in the C jacket space (5). (At this stage, the air in the jacket space (5)! It is difficult to remove it completely.) And after the desired evacuation, C: Open/close valve (
) is closed again, the on-off valve af of the steam supply pipe (61) is opened, and steam is supplied until the inside of the jacket space (5) reaches atmospheric pressure. Air with a heavy specific gravity is pushed by the steam pressure during steam supply and is pushed to one side or L;
) Discharge pipe (9) pushed to the other side and separated from the steam supply pipe (6)
) an air pocket is formed near the After that, the steam supply pipe (
6) On-off valve +゛rrwrrw closed circuit: The on-off valve 01 of the vacuum exhaust pipe 0ga is opened to actively exhaust the air pocket remaining in the jacket space 151 by driving the vacuum pump (old).

By repeating this process alternately, the desired air in the jacket space (5) is almost completely removed, and the saturated steam flowing in from the °C1 steam supply pipe (6) is maintained at a predetermined small force in the jacket space (5). . The drain generated in the CC jacket space 5) is then sequentially discharged through the air trap (81) and the check valve.

After that, the object to be sterilized is stored in the sterilization chamber (3) of the chamber (21), and the opening/closing lid (4) is closed.Then, the vacuum exhaust pipe of
The on-off valve 0 is opened, and the vacuum pump U* is driven to reduce the pressure in the chamber 121 to Y[2]. After the desired evacuation, the on-off valve uz'g is closed and the vacuum pump ++
1+ drive stop. Steam is supplied to the chamber +21 in the negative pressure state until the inside of the on-off valve ('/l = chamber 2) of the steam supply pipe f6+ reaches atmospheric pressure. As a result, the air remaining in the chamber (2), which has a higher specific gravity than the steam, is pushed by the steam pressure during the steam supply and is pushed from one side to the other side, and is moved to the exhaust pipe ('9) away from the steam supply pipe (6). When an air pocket is formed near the 6th place, the on-off valve (7) of the steam supply pipe (6) is closed, and the on-off valve o2 of the vacuum exhaust pipe (13I) is closed again.
By opening 1 and turning on the vacuum pump 111), the air remaining in the chamber 21 is evacuated, and this process is repeated to almost completely remove the air inside the chamber 12. The saturated steam flowing in from the steam supply pipe (6) is maintained at a predetermined pressure in the chamber to reliably sterilize the objects to be sterilized stored in the rudder chamber. The drain is discharged through the steam tube (81) and the check valve, but since the chamber (2) and the jacket space (5) are at the same temperature, the drain generates very little electricity. , nh outlet valve (1 [opened).

In addition, the on-off valve (7) of the steam supply pipe (6) is closed [7, when the inside of the chamber (21) becomes close to atmospheric pressure, the exhaust valve IrfI is closed, and the on-off valve O''l of the vacuum exhaust pipe (131 is opened). The drying process is completed in the evening by vacuum drying with the drive of vacuum pump 01+.
The whole process! It is something that will be completed.

Since the present invention is as described above, the air rush inside the chamber and the jacket space can be effectively removed, and the saturated steam filled later can be maintained in the best condition suitable for sterilization, allowing stable steam sterilization. becomes.

[Brief explanation of drawings]

The drawing is a schematic cross-sectional view of a steam sterilizer according to the present invention.

Claims (1)

[Claims] 1) A double can type that houses the objects to be sterilized and has a chamber with an opening/closing lid at its front opening, and a jacket space formed around the outside of the chamber, and these chambers and jacket space are filled with saturated steam. In the acupuncture device, a steam supply pipe with an on-off valve is connected to one side area of the bottom surface of the chamber and the jacket space, which is divided into two halves, and an exhaust pipe with a steam trap is connected to the other side area. A steam sterilizer characterized in that a vacuum exhaust pipe having a vacuum pump is bypass-connected to the steam trap, and the steam supply pipe and the vacuum exhaust pipe are mutually opened and closed to sequentially remove residual air.