JPS6235475Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a steam-type sterilizer that performs sterilization by filling a chamber containing objects to be sterilized with high-temperature, high-pressure steam.

In this type of steam-type sterilizer, if the temperature of the object to be sterilized stored in the chamber is low, if sterilization steam is suddenly introduced, a portion of the steam will be transferred to the surface of the object due to the temperature difference. Condensation formed,
If the sterilization process continues in this state, the sterilization performance will deteriorate. Furthermore, it is desirable to dry the objects to be sterilized after the sterilization process, which are wet with the steam during sterilization, within a short period of time because this improves work efficiency.

The present invention was developed in view of this point. Before supplying sterilizing steam into the chamber, the temperature of the object to be sterilized is raised to a certain extent to improve sterilization performance, and when drying, the steam flows into the chamber. A spout of heated outside air is opened along the inner wall of the chamber to exchange heat with the inner wall of the chamber and further circulate high temperature air to improve drying efficiency.

One embodiment of this will be explained below with reference to the drawings. Reference numeral 1 denotes a chamber that forms a sterilization chamber 2 for storing objects to be sterilized, and is equipped with an opening/closing lid 4 that closes the front opening 3 via a gasket. A jacket space 5 is formed in the jacket space 5.

Reference numeral 6 denotes a steam generation boiler that generates high-temperature, high-pressure steam to fill the chamber 1 and the jacket space 5. An electric heating heater 7 is installed in the inner bottom of the boiler, and the generated high-temperature, high-pressure steam is supplied to the jacket space 5. The steam is sent to the steam pipe 8 through the steam pipe 8. The drain, etc. accumulated in the jacket space is removed from a steam trap 10 provided in the exhaust pipe 9.
and is discharged through a check valve 11 that opens toward the outside air.

In this manner, the interior of the chamber 1 is heated to a high temperature by the heated inner wall 21 due to the heat of the steam filling the jacket space 5, and the objects to be sterilized stored in advance are heated to a high temperature. Therefore, the sterilization performance during the next sterilization step is improved.

The steam sent into the jacket space 5 flows through a steam supply pipe 13 that is open-connected to the chamber 1 via an on-off valve 12, and the preheated objects to be sterilized are steamed with this high-temperature, high-pressure steam. It is to be sterilized. Of course, before the chamber 1 is steam sterilized, the vacuum exhaust pipe 14 is
A negative pressure state is created by opening the on-off valve 12' provided in the steam supply pipe 13 and driving the vacuum pump 15. By opening the on-off valve 12 of the steam supply pipe 13, high temperature and high pressure can be easily achieved Steam is charged inflow.

Reference numeral 16 denotes an outside air introduction pipe for introducing outside air into the chamber 1 to accelerate the drying of the sterilized object, which branches toward the chamber 1 into a plurality of branch pipes 17, 17, 17, spouts 18, 18, 18 are provided in the chamber 1.
A sterilization filter 20 is connected to the other end of the outside air introduction pipe, and an on-off valve 12'' and a check valve opening toward the chamber 1 are connected near the sterilization filter. A heat exchange section 23 is formed in which a valve 22 is provided in series, and the outside air introduction pipe in the middle is meanderingly piped into the steam generation boiler 6 in a heat exchange relationship.

However, if the on-off valve 12'' of the outside air introduction pipe 16 is opened when the chamber 1 is in a negative pressure state, the outside air passes through the sterilization filter 20 and becomes warm air in the steam generation boiler 6, and the hot air is a spout 1 provided in the ceiling wall 19 of the chamber 1.
It flows in from 8, 18, 18. As shown in FIG. 2, the outlet is opened along the arcuate inner wall 21 of the chamber 1, and the ejected hot air circulates inside the chamber 1 along the inner wall 21. Therefore, the circulating hot air exchanges heat with the heated inner wall 21, becoming hot air with a higher temperature and promoting the drying of the objects to be sterilized.

Next, to explain the sequence of operations, first, after storing the object to be sterilized in the chamber 1, the opening/closing lid 4 is hermetically closed, and the opening/closing valve 21'' of the outside air introduction pipe 16 and the opening/closing valve 12 of the steam supply pipe 13 are closed, respectively. Then, the vacuum pump 15 is driven and the steam from the steam generation boiler 6 is flowed only into the jacket space 5 to heat the chamber 1.Then, after the stored objects to be sterilized are heated, the drive of the vacuum pump 15 is stopped. Then, the on-off valve 12 of the steam supply pipe 13 is opened into the chamber 1, which is now in a negative pressure state, and the chamber 1 is filled with sterilizing steam.After the desired sterilization process is completed, the steam supply pipe 13 is closed, the vacuum pump 15 is driven again to bring the inside of the chamber 1 into a negative pressure state, and then the outside air introduction pipe 1 is closed.
6 opens the on-off valve 12'', heated outside air is introduced from the blow-off ports 18, 18, 18 provided in the ceiling wall 19 of the chamber 1, and is circulated inside the chamber 1 to form hot air at a higher temperature. The entire process is completed by completing the drying of wet objects to be sterilized for a single hour.

Since the present invention is as described above, the warm outside air flowing in from the outside air introduction pipe is heat exchanged with the inner wall to become hot air with a higher temperature, and since the heated outside air is circulated, it can be used not only for normal sterilization process but also for normal sterilization process. An efficient drying process can be achieved and a sterilizer of good quality can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of the steam sterilizer of the present invention, and FIG. 2 is a sectional view of FIG. 1. 1... Chamber, 4... Opening/closing lid, 6... Steam generation boiler, 8... Steam pipe, 14... Vacuum exhaust pipe, 15... Vacuum pump, 16... Outside air introduction pipe, 18... Spout port , 19...Ceiling wall, 21...
inner wall.

Claims (1)

[Scope of utility model registration request] A chamber for storing objects to be sterilized and having a front opening with an opening/closing lid, a jacket space formed around the outer periphery of the chamber, and a vacuum pump connected to the chamber to bring the inside of the chamber into a negative pressure state using a vacuum pump. a steam generating boiler that supplies high-temperature, high-pressure steam into the jacket space and the chamber, respectively, and an outside air introduction pipe that introduces heated outside air into the chamber; A steam sterilizer comprising an opening along the inner wall of the chamber.