JP4388831B2 - Decontamination unit - Google Patents

Description

  The present invention relates to a decontamination apparatus unit for decontaminating a decontamination object by bringing a decontamination gas such as hydrogen peroxide gas into contact with the outer surface of the object.

  Conventionally, parts that require particularly high decontamination treatment (for example, a bowl portion of a parts feeder) of a pharmaceutical manufacturing facility are temporarily removed from the facility and transported to a separate sterilizer, followed by decontamination. The sterilized state was maintained and the original position was attached. However, the parts attaching operation and the conveying operation while maintaining the aseptic condition are very troublesome and troublesome, and there is a problem that a great deal of time and labor are lost. In addition, there is a possibility that decontaminated parts are contaminated during transportation.

  On the other hand, in view of such problems, the pharmaceutical manufacturing facility is installed in an isolator whose room is hermetically sealed, and a decontamination gas such as hydrogen peroxide gas is supplied to the isolator. A configuration for decontamination has been proposed (see, for example, Patent Document 1). By adopting such a configuration, the above problem is solved.

JP 2001-54739 A

  However, the configuration in which the pharmaceutical manufacturing facility is installed in the isolator described above is possible when a new pharmaceutical manufacturing facility is installed, but is applicable to a pharmaceutical manufacturing facility that has already been installed and operated in a clean room or the like. I couldn't.

  On the other hand, a configuration may be proposed in which the entire clean room with the pharmaceutical manufacturing facility is hermetically sealed, hydrogen peroxide gas is introduced into the clean room, and the entire room is decontaminated to decontaminate the facility. However, this configuration has a problem of increasing another work load such as ensuring airtightness in the room. In addition, a large amount of wasteful hydrogen peroxide gas has to be introduced, and the decontamination time is extremely long, resulting in a large economical problem.

  Then, an object of this invention is to provide the decontamination apparatus unit which can eliminate these problems.

  The present invention provides an assembly housing that surrounds an object to be decontaminated whose bottom is opened and is placed at a predetermined position, generates a decontamination gas, and supplies the decontamination gas to the interior of the housing. Gas supply means, an exhaust port for exhausting the gas inside the assembly housing formed on the housing wall of the assembly housing, and a gas guide path for guiding the gas exhausted from the exhaust port to the gas supply means The gas supply means circulates the decontamination gas between the gas supply means and the assembly casing by supplying the gas guided by the gas guide path into the assembly casing again, and the inside of the assembly casing. This is a decontamination apparatus unit for decontaminating a decontamination object.

  In such a configuration, an immovable decontamination target fixed to the floor surface or the like can be surrounded by an assembly housing made up of a predetermined part group. Therefore, it is possible to decontaminate existing equipment and the entire apparatus as a decontamination target without removing parts that require decontamination. In addition, since the decontamination gas is not circulated within the decontamination unit unit and discharged to the outside, that is, the room with the existing equipment, the decontamination gas does not leak around the area where decontamination is unnecessary. In addition, the assembly housing | casing concerning this invention is good also as a structure which provided the open part suitably other than the bottom bottom so that a decontamination target object can be enclosed easily. Thereby, it becomes possible to deal with a wide range of equipment and devices fixed in various forms at predetermined positions. The decontamination includes chemical T-phase decontamination, sterilization, sterilization, sterilization, and the like.

  Here, the gas supply means generates a decontamination gas generated by the gas generation device that generates a decontamination gas, and that is connected to the gas generation device and is mounted on the assembly housing. A gas blower that is supplied to the inside of the assembled housing, and in which the casing of the assembled housing is in a decontamination unit composed of an inner wall and an outer wall that are separated from each other, and a gas formed between the two walls A configuration is proposed in which a circulation communication port for communicating the guide gap and the blower is provided, the gas guide gap is connected to an exhaust port formed in the inner wall, and the gas guide gap serves as a gas guide path. . Here, the inside of the assembly housing means a space surrounded by the inner wall without including the gas guide gap.

  In this way, the apparatus is integrally configured as a whole by mounting the blower on the assembly housing having a double structure and circulating the decontamination gas through the gas guide gap, A piping structure is also unnecessary, and the entire apparatus becomes compact.

  Also, an outside air exhaust port that is formed on the outer wall so as to face the exhaust port formed on the inner wall and communicates the gas guide gap and the outside world, and the outside world and the inside of the assembly housing that are mounted on the assembly housing An internal pressure control means that makes the gas guide gap a negative pressure, and an outside air supply device that cleans the outside air and supplies clean outside air to the inside of the housing. When supplying decontamination gas, the internal pressure control means Therefore, a configuration is proposed in which the gas guide gap is set to a negative pressure and when the clean air is supplied without supplying the decontamination gas, the gas guide gap is not set to a negative pressure.

  In such a configuration, at the time of decontamination, the gas inside the assembly housing including the decontamination gas is sucked into the gas guide gap by the negative pressure action. For this reason, the supplied decontamination gas does not leak to the outside. On the other hand, when supplying clean outside air, the outside air is exhausted from the outside air exhaust port to the outside, so that a one-way flow is formed inside the assembled housing, preventing entry of contaminants, and decontaminated internal space. It can be suitably kept clean.

  On the other hand, an external air exhaust port formed in the outer wall so as to face the exhaust port formed in the inner wall and communicating the gas guide gap and the external environment, and the external environment and the assembly casing disposed in the external air exhaust port An open / close door that converts to either an open state that communicates with the inside or a closed state that blocks the outside from the inside of the assembled housing, and the outside air mounted on the assembled housing to clean the outside air inside the assembled housing An open air supply device that supplies clean outside air.When supplying decontamination gas, the door is closed.When supplying clean outside air without supplying decontamination gas, the open / close door is opened. It is good also as composition to do.

  In such a configuration, at the time of decontamination, the inside of the assembly housing is a closed space, so that the decontamination gas does not leak to the outside. In addition, when supplying clean outside air, a one-way flow that flows from the inside of the assembled housing to the outside air exhaust port can be formed, and the decontaminated internal space can be suitably kept clean.

  In addition, a configuration in which a gas generator is mounted on an assembly housing is proposed.

  By adopting such a configuration, a piping structure or the like for supplying the decontamination gas becomes unnecessary, and the entire apparatus becomes compact.

  The decontamination apparatus unit of the present invention includes an assembly housing that surrounds an object to be decontaminated placed at a predetermined position, supplies a decontamination gas into the assembly housing, and circulates the decontamination. Since the object is decontaminated, the existing decontamination object can be decontaminated, and it is no longer necessary to transport parts that need to be decontaminated to a sterile container while maintaining sterility. There is an excellent advantage that the risk of contamination during transportation can be eliminated. In addition, since the decontamination gas is not leaked to the surroundings where decontamination is unnecessary, there is an excellent effect from the viewpoint of safety or economy.

  In addition, when the air blower is mounted on the assembly housing, the casing of the assembly housing is configured with inner and outer walls, and the gas is circulated through the gas guide gap formed between the inner and outer walls. A complicated and complicated piping structure is omitted, and the apparatus is compact as a whole. In addition, it is possible to dramatically increase the flow rate of the gas to be circulated as compared with the configuration using the pipe as the gas guide path. Furthermore, since the air blower can be attached to any part of the assembled housing, there is an effect of increasing the degree of freedom in design.

  Also, an internal pressure control means and an outside air supply device are mounted on the assembly housing, and the gas guide gap is set to a negative pressure when supplying decontamination gas, and the gas guide gap is not set to a negative pressure when supplying clean outside air. In this case, the device having the internal pressure control function and the outside air supply function is unitized to facilitate handling, and at the time of decontamination, the gas inside the assembly housing including the decontamination gas is sucked into the gas guide gap. There is an advantage that leakage to the outside world can be prevented. On the other hand, when supplying clean outside air, there is an advantage that a one-way flow can be formed inside the assembled housing, and contaminants can be prevented from entering from the outside.

  In addition, when an open / close door is provided at the exhaust port for outside air, and the open / close door is closed when supplying decontamination gas and open when clean outside air is supplied, the inside of the housing is assembled during decontamination. As a closed space, it is possible to reliably prevent the decontamination gas from leaking. In addition, when supplying clean outside air, a one-way flow can be formed inside the assembled housing, which has the advantage that contaminants can be prevented from entering from the outside.

  Further, when the gas generator is mounted on the assembly casing, there is an advantage that the entire apparatus is compact and a piping structure for supplying decontamination gas is not required.

<First embodiment>
The decontamination apparatus unit 1 according to the present invention decontaminates, as a decontamination object, for example, a pharmaceutical manufacturing facility that is placed in a non-detachable manner on a floor surface in a clean room (class B aseptic management area). . According to the decontamination apparatus unit 1, decontamination processing can be performed without leaking hydrogen peroxide gas as a decontamination gas into the clean room and without removing parts that require decontamination.

  As a specific configuration, as shown in FIG. 1, an assembly housing 2 that surrounds the decontamination target object X placed on the floor G is provided. The assembly housing 2 is formed by assembling a group of predetermined parts (wall panel or the like), and has a rectangular parallelepiped shape in the present embodiment. Further, as shown in FIG. 2, the lower bottom of the assembly housing 2 is open. Thereby, the decontamination target object X fixed to the floor G can be surrounded. Note that a space in which the decontamination target X is present is an assembly housing interior 9.

  The wall of the assembled housing 2 is composed of an inner wall 2a and an outer wall 2b that are integrally fixed at a predetermined interval. That is, the assembly housing 2 has a double structure. A gap formed between the walls 2a and 2b is a gas guide gap 4 to be described later.

  On the other hand, the HEPA filter 11 and the rectifying plate 12 are suspended substantially horizontally at the ceiling position in the assembled housing interior 9 so as to have a vertical positional relationship.

  As shown in FIGS. 1 and 2, a blower 3 a is extended and mounted on the outer wall 2 b of the assembly housing 2. The blower 3a includes a box 13 and a circulation fan 10, an exhaust fan 25, an outside air introduction damper 14, an exhaust damper 26, a supply pipe 15, and the like provided therein. Further, a gas generator 3b placed outside the clean room is connected to the blower 3a.

  In such a configuration, when the external air introduction damper 14 is closed in advance and hydrogen peroxide gas is generated in the gas generator 3b, the hydrogen peroxide gas is supplied into the box 13 through a pipe (not shown). Is done. Then, by driving the circulation fan 10, hydrogen peroxide gas is assembled and supplied to the housing interior 9 through the supply pipe 15 penetrating the inner and outer walls 2a and 2b. Here, the supply pipe 15 is arranged at the uppermost position in the assembly housing interior 9, and the hydrogen peroxide gas flowing from the uppermost position is cleaned and rectified by the HEPA filter 11 and the rectifying plate 12, respectively. It flows downward and is released around the decontamination object X.

  Here, as the gas generator 3b, a well-known one using a flash evaporation technique is preferably employed. Further, by placing the gas generator 3b outside the clean room, the operator can always manage the remaining amount of the hydrogen peroxide solution and can continuously supply the hydrogen peroxide gas to the inside 9 of the housing. In addition, the gas supply means concerning this invention is comprised by the gas generator 3b and the air blower 3a concerning this embodiment.

  On the other hand, the blower 3a stops the supply of the hydrogen peroxide gas, opens the outside air introduction damper 14, and drives the circulation fan 10, thereby assembling the inside of the housing 9 according to the same path as described above. It is also possible to introduce clean and straightened clean outside air. Note that the blower 3a and the HEPA filter 11 according to this embodiment form an outside air supply device according to the present invention.

  Further, an exhaust port 7 for exhausting the gas inside the assembly housing 9 to the outside is opened at the lower end portion of the inner wall 2 a of the assembly housing 2. In the present embodiment example, it is also provided at the front facing position.

  Further, an outside air exhaust port 8 having the same size as that of the exhaust port 7 is opened at a position facing the exhaust port 7 in the lower end portion of the outer wall 2b. That is, the exhaust port 7 and the outside air exhaust port 8 communicate with the inside of the assembly housing 9, the gas guide gap 4, and the outside (that is, inside the clean room).

  Furthermore, an open / close door 20 that opens and closes the opening is provided at the outside air exhaust port 8. More specifically, as shown in FIG. 3, the opening / closing door 20 includes a flat shutter 21 made of an aluminum material, and a cylinder 22 that can be expanded and contracted in the horizontal direction. The shutter 21 is connected to the movable tip of the cylinder 22, and the shutter 21 and the outside air exhaust port 8 are separated from each other according to the movement of the cylinder 22 so that the outside and the assembled housing 2 communicate with each other. The outside air exhaust port 8 is closed so that it can be converted into any one of a closed state in which the outside and the assembled housing 2 are blocked. The cylinder 22 is supported by a support base 23 disposed around the exhaust port 7 so as not to block the opening. A packing 24 is disposed on the surface of the outer wall 2b with which the shutter 21 abuts, so that the shutter 21 can be reliably closed.

  Further, as described above, the gas guide gap 4 is formed between the inner wall 2a and the outer wall 2b constituting the assembly housing 2, and, as shown in FIG. 2, the connection between the outer wall 2b and the blower 3a. The air blower 3a communicates with the circulation communication port 6 formed on the surface. The gas guide gap according to the present embodiment constitutes a gas guide path according to the present invention. The gas guide gap 4 (gas guide path) may be provided with a throttle such as an orifice and provided with an internal pressure adjusting means for increasing the negative pressure in the gap 4 (gas guide path).

In such a configuration, the decontamination of the decontamination object X is executed as follows.
After installing the required equipment 3a etc. in the assembly case 2 assembled at a predetermined production site or installation site to unitize the decontamination device, and surround the decontamination target object X in the clean room, it opens and closes The door 20 is closed. And the assembly housing inside 9 is made into a closed state.

  Then, with the outside air introduction damper 14 closed, the circulation fan 10 is driven to supply hydrogen peroxide gas to the inside 9 of the housing. The hydrogen peroxide gas is sequentially discharged around the decontamination target object X through the supply pipe 15, the HEPA filter 11, and the rectifying plate 12, and decontamination of the decontamination target object X is started. In addition, before decontamination, it is good also as a structure which assembles dry air and supplies it to the housing inside 9, and dehumidifies the interior space.

  Here, the gas containing hydrogen peroxide gas supplied to the inside 9 of the assembled casing flows out into the gas guide gap 4 through the exhaust port 7 and is exhausted. The gas guided from the exhaust port 7 to the gas guide gap 4 is supplied again into the box 13 of the blower 3a through the circulation communication port 6.

  Then, the gas guided to the blower 3 a is assembled again by the circulation fan 10 and supplied to the housing interior 9. That is, a gas containing hydrogen peroxide gas circulates between the blower 3a and the assembly housing 2. By continuing the circulation of the hydrogen peroxide gas for a predetermined time, the decontamination target X can be decontaminated. Here, as the decontamination mode, a configuration in which hydrogen peroxide gas is condensed on the outer surface of the decontamination target X is suitable. Thus, the decontamination effect improves by forming a condensed liquid layer in the decontamination target object X outer surface.

  If it is determined that decontamination is complete, aeration is performed next. That is, the supply of the hydrogen peroxide gas is stopped, the exhaust fan 25 provided in the blower 3a is driven, and the exhaust damper 26 is driven through the decomposition filter 27 that decomposes the hydrogen peroxide gas into water and oxygen. Exhaust the gas.

Next, the aspect at the time of operating the decontamination target object X (pharmaceutical manufacturing equipment) is demonstrated, maintaining the aseptic state after decontamination after aeration execution.
In order to keep the assembled housing interior 9 clean, the decontamination device unit 1 opens the outside air introduction damper 14 and the open / close door 20 and drives the circulation fan 10 in this state. By adopting such a configuration, the clean outside air supplied to the assembled housing interior 9 is discharged to the outside (in the clean room) through the outside air exhaust port 8. That is, a one-way flow from the upper side to the lower side is formed in the assembled housing interior 9, and the decontamination target X can be kept clean without causing contaminants to enter the assembled housing interior 9. Of course, the exhausted gas does not contain a hydrogen peroxide gas component.

<Second embodiment>
Another embodiment is also proposed.
As shown in FIGS. 4 and 5, the decontamination apparatus unit 1 a according to the second embodiment is provided in the gas guide gap 4 instead of the opening / closing door 20, and is provided in the exhaust port 7 and the outside air exhaust port 8. In this configuration, the internal pressure control mechanism 23 is installed at a position facing the vehicle. The internal pressure control unit according to the present embodiment is configured by the internal pressure control mechanism 23 according to the present embodiment.

  The internal pressure control mechanism 23 erected on the floor G of the gas guide gap 4 includes a main body 25 fixed to the floor G and a movable head 24 that moves up and down. In such a configuration, the movable head 24 has the highest position where the distance between the upper edge of the exhaust port 7 and the movable head 24 is as small as possible (see FIG. 4). 7 and the outside air exhaust port 8 are in the lowest position (see FIG. 5).

  Here, when the decontamination object X is decontaminated, the internal pressure control mechanism 23 is driven to bring the movable head 24 to the highest position. That is, if a slight gap is generated between the movable head 24 and the upper edge of the exhaust port 7, the gas guide gap 4 is in a negative pressure state in relation to the internal pressure inside the assembled housing 9. The gas inside the assembled housing 9 is sucked into the gas guide gap 4 from a large gap. As a result, the hydrogen peroxide gas can be circulated using the gas guide gap 4 as a gas guide path. Strictly speaking, the assembly housing interior 9 and the outside (inside the clean room) are in communication with each other even when the movable head 24 is in the highest position. The decontamination target X can be decontaminated without leaking hydrogen oxide gas to the outside.

  On the other hand, when operating the decontamination object X (pharmaceutical manufacturing equipment), the movable head 24 is moved to the lowest position, the gap between the movable head 24 and the upper edge of the exhaust port 7 is enlarged, The outside air exhaust port 8 is sufficiently communicated. In this way, the negative pressure action that makes the gas guide gap 4 negative pressure does not occur, and clean outside air is assembled and introduced into the housing inside 9 in such a state. As a result, the clean outside air supplied from above into the assembled housing interior 9 is discharged to the outside through the exhaust ports 7 and 8, and a one-way flow can be formed in the assembled housing interior 9. Become. As a result, contaminants can be prevented from entering the assembled housing interior 9.

<Third embodiment>
Further, a decontamination apparatus unit 1b that can be easily moved is proposed.
As shown in FIG. 6, the assembly housing 2 is configured to be detachable from the floor G, and a plurality of casters 32 are arranged at the lower end of the assembly housing 2 so that the main body of the decontamination apparatus unit 1b can be easily moved. It is good also as a structure which can be made to do. In such a configuration, a loading opening 30 through which the decontamination target X (pharmaceutical manufacturing equipment) can pass through the side wall of the assembly housing 2, and a loading door 31 that blocks the loading opening 30, The structure provided with is suitable. With this configuration, the decontamination apparatus unit 1 is manually pushed and moved to the position where the decontamination target object X is installed, and the decontamination target object X is assembled into the housing interior 9 via the loading opening 30. It is possible to place the decontamination object X in a surrounded state. According to such a configuration, the decontamination object X can be made to be present in the assembly housing 2 simply and quickly without lifting the assembly housing 2 and the decontamination can be executed.

<Fourth embodiment>
Further, as shown in FIG. 7, a configuration using a single-layer assembly housing 2 ′ may be proposed. In such a configuration, the gas guide path is configured by the gas guide pipe 4a provided outside the assembly housing 2a. The gas guide pipe 4a is connected to an exhaust port 7 formed in the casing 2c and a circulation communication port 6a formed in the blower 3a.

  As described above, the assembly housing 2 according to the present invention is used for a predetermined period in a state where the specific decontamination target X is surrounded, but is fixedly placed at a predetermined position. Further, it is not excluded that the movable assembly case is movable relative to the decontamination target X.

  In each embodiment, the gas generator 3b may also be configured to be mounted on the assembly housings 2 and 2 '. Further, the outer shape of the assembly cases 2 and 2 'can be variously changed.

  Examples of the decontamination gas include gasification of decontamination agents such as formaldehyde, ethylene oxide, peracetic acid aqueous solution, and ozone water.

It is a front view of the decontamination apparatus unit 1 concerning the example of 1st embodiment. It is a longitudinal cross-sectional view of the decontamination apparatus unit 1. It is explanatory drawing which shows the opening / closing aspect of the opening-and-closing door. It is a longitudinal cross-sectional view of the decontamination apparatus unit 1a concerning the example of 2nd embodiment. 4 is an explanatory diagram showing a driving mode of an internal pressure control mechanism 23. FIG. It is a usage condition figure of the decontamination apparatus unit 1b concerning the example of 3rd embodiment. It is a longitudinal cross-sectional view of the decontamination apparatus unit 1c concerning the example of 4th embodiment.

Explanation of symbols

1, 1a, 1b, 1c Decontamination device unit 2, 2 'Assembly housing 2a Inner wall 2b Outer wall 2c Housing wall 3a Blower 3b Gas generator 4 Gas guide gap 4a Gas guide pipes 6, 6a Circulation communication port 7 Exhaust port 8 Exhaust port for outside air 9 Inside assembly housing 20 Open / close door 23 Internal pressure control mechanism X Decontamination target

Claims (2)

An assembly housing that opens a lower bottom and surrounds an object to be decontaminated placed at a predetermined position;
Gas supply means for generating a decontamination gas and assembling the decontamination gas into the housing;
An exhaust port formed on the wall of the assembly housing for exhausting the gas inside the assembly housing;
A gas guide path for guiding the gas exhausted from the exhaust port to the gas supply means,
The gas supply means comprises a gas generator for generating a decontamination gas, and a blower unit that communicates with the gas generator and assembles the decontamination gas generated by the gas generator into the housing. The gas guided by the gas guide path is reassembled and supplied to the inside of the casing, thereby decontamination gas is circulated between the gas supply means and the inside of the assembly casing, and the decontamination target inside the assembly casing In a decontamination unit that decontaminates things ,
The housing wall of the assembly housing is composed of an inner wall and an outer wall that are spaced apart from each other, and a gas guide gap serving as a gas guide path is formed between both walls, and an exhaust port that communicates the gas guide gap and the inside of the assembly housing is provided on the inner wall. Forming a circulation communication port that communicates the gas guide gap and the blower on the outer wall, and further forming an outside air exhaust port that communicates the gas guide gap and the outside to the outer wall;
An internal pressure control means that makes the gas guide gap a negative pressure compared to the outside and the inside of the assembled housing, and an outside air supply device that cleans the outside air and supplies clean outside air inside the assembled housing are mounted on the assembled housing, When supplying gas for decontamination, the internal pressure control means makes the gas guide gap negative pressure, and when supplying clean outside air without supplying decontamination gas, the gas guide gap is not made negative pressure. Decontamination equipment unit. An assembly housing that opens a lower bottom and surrounds an object to be decontaminated placed at a predetermined position;
Gas supply means for generating a decontamination gas and assembling the decontamination gas into the housing;
An exhaust port formed on the wall of the assembly housing for exhausting the gas inside the assembly housing;
A gas guide path for guiding the gas exhausted from the exhaust port to the gas supply means,
The gas supply means comprises a gas generator for generating a decontamination gas, and a blower unit that communicates with the gas generator and assembles the decontamination gas generated by the gas generator into the housing. The gas guided by the gas guide path is reassembled and supplied to the inside of the casing, thereby decontamination gas is circulated between the gas supply means and the inside of the assembly casing, and the decontamination target inside the assembly casing In a decontamination unit that decontaminates things,
The housing wall of the assembly housing is composed of an inner wall and an outer wall that are spaced apart from each other, and a gas guide gap serving as a gas guide path is formed between both walls, and an exhaust port that communicates the gas guide gap and the inside of the assembly housing is provided on the inner wall. Forming a circulation communication port for communicating the gas guide gap and the blower on the outer wall, and forming an outside air exhaust port for communicating the gas guide gap and the outside on the outer wall;
An open / close door disposed in the exhaust port for outside air, which is converted into either an open state in which the outside world communicates with the inside of the assembled housing or a closed state in which the outside world and the inside of the assembled housing are blocked;
An outside air supply device mounted on the assembly housing to clean the outside air and supply clean outside air into the assembly housing;
The decontamination apparatus is characterized in that when the decontamination gas is supplied, the door is closed, and when the clean air is supplied without supplying the decontamination gas, the door is opened. unit.

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