RU29855U1 - STEAM STERILIZER - Google Patents

Description

2002118040

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A utility model is proposed that relates to the field of medical equipment and, in particular, to devices for sterilization with saturated steam under pressure of materials and objects, such as dressings, surgical underwear, surgical instruments, etc.

A device is known for sterilizing materials and tools (see Utility Model No. 13868, M. class A61L2 / 00. 2000) comprising a housing, a sterilization chamber with openings for incoming and outgoing flows of working agents (steam), a cooling system, forced circulation mechanisms and thermoregulation of working agents, a capacitor and a sterilization process control device. In this steam sterilizer, the sterilization chamber does not have a steam jacket, therefore, the sterilization chamber is heated with steam from the inside of the chamber, as Steam only enters the chamber. In this case, the condensate remains at the bottom of the chamber, affecting the final humidity of the sterilized material. The temperature field inside the chamber remains uneven, at the bottom of the chamber the temperature is lower than in its upper part. Moreover, the temperature difference is very significant and may not fit into the tolerance field of the specified temperature sterilization mode.

Steam sterilizers are known in which the sterilization chamber is manufactured with a steam jacket, wherein the steam jacket covers the entire surface area of the sterilization chamber.

The closest technical solution known to the author is the steam sterilizer described in the patent of R.F. No. 2067455 class 6A61L2 / 06, 1996. The sterilizer contains a pressure chamber, which also serves as a steam jacket, a cover, an insert — a sterilization chamber, and a pressure chamber — paMPK6A611 2/00 Steam sterilizer.

A flat shirt covers the entire surface area of the sterilization chamber of the insert. It also contains a safety valve, pipelines for supplying steam and air to the sterilization chamber and for removing condensate from it, and a means for cooling the chamber. In this sterilizer, the steam jacket - pressure chamber allows you to preheat the sterilization chamber - the insert on the outside of its walls and thus prevent the formation of condensate that has gone to the heat inside the sterilization chamber. This fact simplifies the solution of the issue of drying sterilized products. The steam jacket creates a uniform temperature field throughout the entire volume of the sterilization chamber, which is very important for observing the temperature regime of the sterilization process. However, a uniform temperature field inside the sterilization chamber eliminates the temperature difference (temperature gradient) at different points of the sterilization chamber. In this case, there is no movement of the heat flux from the hot wall to the cold one and vice versa. As a result, with incomplete removal of air from the sterilization chamber in it, places of accumulation of air may form, and it will not mix with steam. And thus, in the place of accumulation of air in the sterilization chamber there will be no moist heat and sterilization temperature, therefore, in this place the products will remain unsterilized.

The technical result provided by a useful model is to increase the efficiency of sterilization of materials by completely heating and improving mixing of the steam-air mixture in the sterilization chamber with sterilization objects, as well as simplifying the design of the sterilizer.

The specified technical result is achieved in that in a known steam sterilizer containing a sterilization chamber with a lid for loading the material to be sterilized, a steam jacket, a safety valve, pipelines for supplying steam and air to the sterilization chamber and for removing condensate from it.

According to a utility model, a steam jacket is located at the bottom of the sterilization chamber, the area of contact between the steam jacket and the surface of the sterilization chamber occupies at least 1/6 of the surface area of the sterilization chamber, and the steam jacket is additional, equipped with a safety valve and pressure gauge, and connected to pipelines steam supply to the sterilization chamber and a steam trap. Between the distinguishing features and the achieved technical results there is a causal relationship.

Unlike the known solutions and the prototype, in the proposed steam sterilizer, the steam jacket is located at the bottom of the sterilizer, and the area of the steam jacket should be at least 1/6 of the covered surface area of the sterilization chamber, which allows to improve the mixing of the steam-air mixture due to the presence of a temperature gradient and, accordingly, the heat flux in the chamber and to ensure complete heating of the internal volume of the sterilization chamber and sterilization objects.

According to the information available to the applicant, the set of essential features of the claimed utility model is not known from the prior art, which allows us to conclude that the claimed object meets the criterion of "novelty.

The set of essential features characterizing the essence of the utility model can be repeatedly used in the manufacture of sterilizers to obtain a technical result consisting in increasing the efficiency of sterilization of materials and simplifying its design, which allows us to conclude that the claimed object meets the criterion of "industrial applicability."

The essence of the utility model is illustrated by an example of a specific implementation and drawings, where in FIG. 1 shows a schematic pneumohydraulic diagram of a sterilizer.

The sterilizer consists of a sterilization chamber - 1, a cover or a door - 2.

At the bottom of the sterilization chamber is a steam jacket - 3, which occupies an area of at least 1/6 of the surface area of the sterilization chamber -1.

A steam line - 4 is suitable for the sterilization chamber - 1 from an automatic or external source of steam supply. Steam through the pressure reducer - 5 and the shutoff valve - 6 enters the sterilization chamber - 1. The pressure in the sterilization chamber is checked using a pressure gauge - 7. A safety valve - 8 is installed on the sterilization chamber to prevent a pressure increase above the allowable pressure.

From the steam pipe - 4 steam also enters the steam jacket - 3 through the pressure reducer - 9 and the shutoff valve - 10. The steam pressure in the steam jacket is checked by a pressure gauge -11.

To prevent the pressure increase in the steam jacket - 3 above the permissible pressure relief valve - 12.

Accumulating condensate in the sterilization chamber - 1 and the steam jacket 3 through the steam trap -13 and 14 is discharged into the sewer.

A liquid ring vacuum pump - 15 with an open valve - 16 creates a vacuum in the sterilization chamber.

The device operates as follows:

With the help of the vacuum pump - 15, with the valve -16 open, air is removed from the sterilization chamber and loaded sterilization objects. At the same time, steam is supplied through the pressure reducer - 9 and valve - 10 to the space of the steam jacket - 3, warms up the lower part of the sterilization chamber - 1. The resulting condensate is removed through the steam trap - 14 from the steam jacket.

After removing air in the sterilization chamber - 1, steam is supplied into it through a pressure reducer - 5 and valve - 6, and the sterilization chamber and the sterilization objects located in it are heated to the sterilization temperature. The condensate formed is removed through a steam trap-13. When the sterilization chamber reaches 1 sterilization temperature, a report of the sterilization exposure starts. At this stage, the temperature in the sterilization chamber is maintained automatically by periodically supplying steam to the sterilization chamber to fulfill the parameters.

After the completion of the sterilization exposure stage, the pressure in the sterilization chamber - 1 is released and a vacuum is created using the vacuum pump - 15, and the drying stage begins.

At the same time, the bottom of the chamber continues to warm up by supplying steam to the steam jacket - 3.

After the drying stage is completed, the pressure in the sterilization chamber is balanced with atmospheric pressure, by supplying atmospheric air to the sterilization chamber through a bacterial filter - 17 and the valve - 18. This completes the sterilization process. Due to the location, in the lower part of the sterilization chamber - 1, of the steam jacket - 3, the mixing of the steam-air mixture is improved and the internal volume of the sterilization chamber and sterilization objects are completely warmed up, and thereby the sterilization efficiency is increased. At the same time, the design of the sterilizer is simpler in comparison with the known ones.

The authors:

Toropov Gennady Vasilievich

Karbin Alexander Aleksandrovichl Iliy Mikhail IvanovichT feL-AMorozov Boris Semenovich

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1 A steam sterilizer containing a sterilization chamber with a cover for loading the material to be sterilized into the chamber, a steam jacket, a safety valve, pipelines for supplying and discharging steam and air into and out of the sterilization chamber, characterized in that a steam jacket is located in the lower part of the sterilization chamber, moreover, the area of contact with the surface of the sterilization chamber occupies at least 1/6 of the surface area of the sterilization chamber.

2 The steam sterilizer according to claim 1, characterized in that the steam jacket is connected to pipelines for supplying steam to the sterilization chamber and the steam trap.

3 The steam sterilizer according to claim 1, characterized in that the steam jacket is equipped with a safety valve and a pressure gauge.

The authors:

Toropov Gennady Vasilievich About

Karbin Alexander Alexandrovich

Iliy Mikhail Ivanovich L Ј,

Morozov Boris Semenovich

The utility model formula.

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Steam sterilizer

5 6

7 8

Claims (3)

1. A steam sterilizer comprising a sterilization chamber with a lid for loading the material to be sterilized into the chamber, a steam jacket, a safety valve, pipelines for supplying and discharging steam and air into and out of the sterilization chamber, characterized in that there is a steam in the lower part of the sterilization chamber shirt, and the area of contact with the surface of the sterilization chamber occupies at least 1/6 of the surface area of the sterilization chamber. 2. The steam sterilizer according to claim 1, characterized in that the steam jacket is connected to the pipelines for supplying steam to the sterilization chamber and the steam trap. 3. The steam sterilizer according to claim 1, characterized in that the steam jacket is equipped with a safety valve and a pressure gauge.