JPS607070Y2 - Residual gas removal equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a residual gas removal device for quickly removing residual gas from an object to be sterilized after microorganisms have been sterilized with a sterilizing gas.

In hospitals and the like where microorganisms must be sterilized, such as instruments used in surgery, microorganisms are sterilized using a method suitable for the object to be sterilized.

Currently, sterilization of microorganisms can be roughly divided into heat, radioactive substances,
Germicidal gases are used, and sterilizing gases are often used because they are more effective than others.

Sterilizing microorganisms using this sterilizing gas is effective against all microorganisms, does not cause any damage to the object to be sterilized, and is relatively effective against ethylene oxide gas, which is a type of sterilizing gas. Although it has various advantages such as being easily available, it has the disadvantage that the gas is toxic to humans and it takes a long time to remove the residual gas.

Therefore, the purpose of this invention is to provide an optimal device for quickly removing residual gas from objects to be sterilized after sterilizing microorganisms using sterilizing gas. Explain.

Reference numeral 1 denotes a main body case, the interior of which is divided into upper and lower parts by a single partition plate 2.

Reference numeral 3 denotes an article storage room, which is surrounded by a partition wall 4 and has a door 5 that opens on one side at the front.

Reference numeral 6 denotes a second door that opens on one side and is provided on the side wall 7 on the front side of the main body case 1, and a pressurized chamber 8 is provided between the second door 6 and the air 5.

Reference numeral 9 denotes an intake port provided on the upper plate 10 of the main body case 1, which is covered by the pre-filter 11 and the heater 12.

Reference numeral 13 denotes an air intake chamber, in which two blowers 14.15 are provided, and these air blowers 14.15 suck outside air from the air intake port 9.

16 is a first air supply chamber, 17 is a second air supply chamber, and both air supply chambers 16 and 17 each cover the air outlet 18.19 of the 11th and 2nd blower 14.15 with a partition plate 20. It's a formality.

21.22 is the air outlet 1 of the first and second blower 14.15
8.19, the first and second air supply chambers 16.1
This is a filter installed in 7.

Reference numeral 23 denotes a ventilation hole which is provided by opening the partition plate 2 and the partition wall 4, respectively.
and the article storage room 3 are communicated with each other.

Reference numeral 24 denotes a ventilation hole provided in the partition plate 2, which connects the second air supply chamber 1.
7 and a pressurizing chamber 8 are communicated with each other.

25 is the side wall of the main body case 1, the partition plate 2, and the partition plate 26
An exhaust air blower 27 is provided inside the exhaust chamber defined in the main body case 1, and an air outlet 28 of the blower 27 communicates with an exhaust port 29 provided on the side wall on the back side of the main body case.

Reference numeral 30 denotes a vent for communicating the article storage chamber 3 with the exhaust chamber 25, and a filter 31 is provided to prevent contaminated air in the article storage chamber 3 from flowing into the exhaust chamber 25.

32 is an operation panel, which includes switches 3 for operating each of the blowers.
3 and an indicator light 34 are incorporated.

Next, the operation of the device of the present invention will be explained.

The objects to be treated, such as instruments, which have been treated with a sterilizing gas such as ethylene oxide gas, are placed into the article storage chamber 3 by first opening the second outer door 6 and then opening the inner door 5.

Although not shown in this embodiment, inside the article storage chamber 3,
A mounting table suitable for the items to be stored, such as a shelf, may be provided.

After the objects to be processed have been stored in the object storage chamber 3, the door 5 and the second
The first and second air blowers 14 and 15 are operated by closing the door 6 in order and turning on the switch 33 on the operation panel 32.

When both the first and second blowers 14 and 15 are operated, air outside the main body case 1 is sucked into the intake chamber 13 from the intake port 9 due to the suction force.

At that time, the pre-filter 11 and the heater 1 are installed in the intake port 9.
2 is provided, the dirty air outside is purified and heated by the heater 12.

The purpose of heating this air is to activate molecular motion and speed up removal of residual gas.

The clean warm air sucked into the intake chamber 13 is
The air is sucked into each of the second air blowers 14 and 15 and discharged from the air outlet 18 to the first air supply chamber 16 and the air outlet 1.
9 and supplied to the second air supply chamber 17, respectively.

Even during this air supply, the air is completely purified since both air outlets 18, 19 are provided with filters 21, 22, respectively.

The clean air sent into the first air supply chamber 16 is gradually pressurized, flows out from the ventilation opening 23, and flows into the article storage chamber 3.

On the other hand, the clean air sent into the second air supply chamber 17 is also gradually pressurized, flows out from the ventilation port 24, and flows into the pressurization chamber 8.

When the two doors 5 and 6 are closed, the pressurizing chamber 8 is formed by a sealed portion between the front side wall 7 of the main case 1 and the second door 6, and by the sealing portion of the partition wall 4 forming the article storage chamber 3. Front side and door 5
There is only a slight leakage of air at the sealing area, but the interior remains pressurized at a constant level.

FIG. 4A is a graph showing the pressure state of the pressurizing chamber 8 during the residual gas processing operation.

The inside of the pressurized chamber 8 is always pressurized during the treatment of residual gas, and clean air is blown inside, so even if air leaks from the seal, the main body case 1 will not be damaged. Not only the outside but also the objects to be processed stored in the object storage chamber 3 are not affected at all.

On the other hand, the heated clean air sent into the first air supply chamber 16 flows out from the ventilation port 23 and flows into the article storage chamber 3 as the pressure within the chamber 16 increases.

The objects to be processed in the object storage chamber 3 are clean, and residual gas is gradually removed by exposing them to heated air.

Therefore, when the exhaust blower 27 is operated, the air in the article storage chamber 3, which communicates with the exhaust chamber 25 through the vent 30, is filtered through the filter 31 by the suction force of the blower 27.
It is sucked into the body case 1 and discharged from the exhaust port 29 to the outside of the main body case 1 .

By repeating the operation and stopping of the exhaust blower 27, the air flow inside the article storage chamber 3 changes its flow velocity and becomes turbulent.For example, even gas remaining inside a thin tube is sucked into the air whose flow velocity changes. It will be removed quickly.

In this case, if the first blower 14 is stopped when the exhaust blower 27 is in operation, the throughput can be further increased.

In addition, since the air is heated, it activates molecular activity and accelerates the diffusion of residual gas.

FIG. 4B is a graph showing the pressure state inside the article storage chamber 3 during residual gas processing work. By operating the exhaust blower 27, the pressure inside the chamber 3 becomes negative pressure, and conversely, the pressure inside the chamber 3 becomes negative pressure. 27 is stopped, the pressure inside the chamber 3 becomes positive pressure.

As mentioned above, the residual gas removal apparatus of the present invention forms an article storage chamber inside the main body case, and a second door is provided in the main body case in front of the door provided at the entrance and exit of the processed material to the chamber, A pressurized chamber is formed between these two doors, and the article storage chamber and the pressurized chamber are connected to air supply chambers each equipped with an individual blower through a ventilation hole. Each pressure chamber can be adjusted to its own indoor pressure, and the article storage chamber communicates with an exhaust chamber equipped with an air blower, and by repeatedly starting and stopping the exhaust blower, the air pressure inside the article storage chamber can be adjusted. The air flow rate can be changed, and residual gas can be removed in a short time no matter what shape the object is to be processed.

Furthermore, even if the pressure inside the product storage chamber changes, there is a pressurized chamber in front of the door that maintains positive pressure at all times, so residual gas will not leak outside the main case during processing operations. It also has the effect of being safe to use.

[Brief explanation of the drawing]

Figure 1 is a front view, Figure 2 is a cross-sectional view taken along line ■-■ in Figure 1, Figure 3 is a cross-sectional view taken along line ■-■ in Figure 1,
Figure 4 is a graph showing the pressure status of the article storage chamber and the pressurizing chamber, Figure 4 A is a graph showing the pressure status of the pressurizing chamber, and Figure 4
Figure B is a graph showing the pressure state of the article storage chamber. Code 1: Main body case, 2: Partition plate, 3: Article storage chamber, 4: Partition wall, 5
...Door, 6...Second door, 8...
... Pressurized chamber, 9... Intake port, 11...
Pre-filter 112... Heater 13...
...Intake chamber, 14...First blower, 15
...Second blower, 16...First air supply chamber, 17...Second air supply chamber, 20...
・Dividing board, 21, 22...Filter, 23,
24... Ventilation port, 25... Exhaust chamber, 2
7... Exhaust blower, 29... Exhaust port, 30... Ventilation port, 31... Filter 32... Operation panel.

Claims (1)

[Scope of utility model registration request] Inside the main case, a partition wall and a door form an article storage room, and a second door is provided on the side wall of the main case in front of the door of the room. A pressurized chamber is formed between the main body case, and an air intake port is provided in the main body case, and an air intake chamber connected to the air intake port is formed inside the main body case, and two blowers are installed in the air intake chamber. Each air outlet is supported by a partition plate provided in the intake chamber, and both first and second air supply chambers are connected to each air intake chamber, and the first air supply chamber and The article storage chamber, the second air supply chamber, and the pressurizing chamber are communicated with each other through a ventilation hole, and a filter and a heater are provided in the air intake chamber or both the first and second air supply chambers, and the article storage chamber is connected to the pressurization chamber. and a residual gas removal device configured to forcefully feed heated clean air into a pressurized chamber, and further to communicate the article storage chamber with an exhaust chamber provided with a filter and a blower inside.