JPH01288342A - clean cabinet - Google Patents

Abstract

PURPOSE:To prevent a contaminated air in a sample storage room from polluting other samples both during the storage of samples and when an operation is carried out by arranging double barriers in front of the sample storage rooms. CONSTITUTION:A blower 2a and an HEPA filter 1a for individual barriers are set upon sample storage rooms 5, the first space equipped with the first door 3 and the second door 4, and an air curtain is formed by supplying a clean air from the filter 1a into a space between the doors 3 and 4 as the first isolation device. On the other hand, a blower 2b and a HEPA filter 1b for a common barrier are arranged in front of the door 4 and another air curtain of clean air is formed in the second space between the door 4 and the third door 5 as the second isolation device. It is possible, as a result, to prevent a mutual contamination, because the contaminated air in a sample storage room does not move into other storage rooms.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a clean cabinet, and particularly to a structure suitable for sample storage and experiments.

[Conventional technology]

As shown in Figure 11, the conventional device has a single laminar region in front of the storage space, and care must be taken to prevent mutual contamination between samples7. For example, rBiome published by Hokuryukan
dicaJ vol.

2, No. 10 (October 1987), pages 98 and 99.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, there is a risk that contaminants from the sample may be scattered and transferred to other samples during sample storage or operation.

An object of the present invention is to provide a clean cabinet that does not cause scattering of samples to other samples during one sample storage operation.

[Means to solve the problem]

The above objective is achieved by providing a double barrier in front of the sample storage chamber.

[Effect]

The space between the first door and the second door is used to keep the storage room clean.
Clean one workbench in the space between the door and the third door. This keeps the storage room and workbench clean at all times, and prevents cross-contamination between samples.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 10.

A first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The clean cabinet in this embodiment has a first door 3 on the front.
An individual barrier blower 2a and a HEPA filter 1a are placed above the sample storage chamber 6 as a first space, which is equipped with the first door 3 and a second door separated by a predetermined distance. The clean air supplied from 1a is transferred to the first door 3.
and the second door 4 to form an air curtain as a first isolation means, and also to store samples through an opening 3a provided in the first door 3 as a differential pressure generating means. It is supplied to room 6. The air in the sample storage chamber 6 is communicated with the suction port of the blower 2a via the HEPA filter 1c provided on the back side of the sample storage chamber 6, and the second door 4
A common barrier blower 2b and a HEPA filter 1b are provided on the front surface of the filter, and a second isolation means is provided in the second space between the second door 4 and the third rIi5 provided further in front of the second door 4. The system is designed to form an air curtain of clean air.

The air blown from the individual barrier blower 2a is HE P
It is cleaned by the A filter 3a and is supplied to the front chamber between the first door 3 and the second door 4 through the duct, and some of it is sent to the sample storage room 6, and some of it is sent to the work room from the second door. It will be done.

The air blown from the common barrier blower 2b is HEPA.
The air is cleaned by the filter 1b, directed to the workbench 7 in which the opening 7a is formed, and exhausted through the exhaust filter and the blower. Therefore, the front chamber has a positive pressure, the sample storage chamber has a negative pressure, and the working chamber has a negative pressure, thereby preventing mutual contamination between the sample storage chambers.

Note that the pressure in the sample storage chamber is controlled to be lower than that in the front chamber. When the first and second doors are open, even if contaminated air enters the work room, the second door will open. The air between the third door is purified and there is no cross-contamination even if other storage rooms are opened next. However, the condition is that two or more storage room doors cannot be opened at the same time. For this purpose, an interlock mechanism may be provided between the doors.

Figure 2 shows the opening/closing of the first and second doors and the ON and OFF states of the common barrier fan.Although the fan may be turned on regardless of whether the S door is opened or closed, it is possible to turn it on only when the door is opened. It also allows for energy-saving driving.

A second embodiment of the present invention will be described with reference to FIG.

In this embodiment, a plurality of sample storage shelves are connected in a horizontally adjacent manner.

In this embodiment, the air purified by the blower 2 and the HEPA filter 1 is blown out horizontally into the space between the second door 4 and the third door 5 to form an air barrier, and the blown air is The air is sucked into the suction port of the side blower, and this process is repeated to form an air barrier in front of the plurality of sample storage shelves. In addition, the second door 4
In order to maintain a negative pressure in the working chamber between the door 5 and the third door 5, in this embodiment, a part of the air immediately after being blown out from the HEPA filter 1b is exhausted, and that amount of air is directed to the front of the third door 5. The device is configured to draw suction through the provided opening.

A third embodiment of the present invention will be described with reference to FIGS. 4 and 5.

This embodiment is an example in which a plurality of sample storage chambers are provided inside the safety cabinet.

In this embodiment, only the sending device 2a is placed above the sample storage chamber 6, and the blower 2a sucks a part of the air blown from the HEPA filter IB and supplies it to the sample storage chamber 6. The air in the sample storage chamber 6 is sucked into the common barrier blower 2b via the HEPA filter 1c, purified by the HEPA filter 1b, and then transferred to the space between the second door 4 and the 33rd percentile 5, that is, the work of the safety cabinet. It is blown out into space. Note 1
In this embodiment, a storage shelf 9 for storing experimental tools and the like is provided at the bottom of the sample storage chamber 6. Also, in Figure 4, 7
1 is a workbench, 7a is a suction port, 10 is a pre-filter, 8 is a duct 1d is an exhaust HEPA filter. FIG. 5 is a front view of the installation state of the sample storage chamber 6 in the safety cabinet. A blower 2a is installed around the sample storage chamber 6.
A duct 6a is formed through which clean air blown out flows.

A first modification of this embodiment is shown in FIG.

This modification example has one individual barrier air blower! This is an example in which 102 is placed separately.

The individual barrier blower 102 is stored in a case 110,
The air outlet communicates with the upper part of the sample storage chamber 6 via the duct 106. The blower 102 has a HEPA filter 10
Air is sucked through 1 and the blown air is 1st JJ%3
and the second door 4, and is supplied to the sample storage chamber 6 through the 153rd opening 3a. The air in the sample storage chamber 6 is sucked into the exhaust blower 104 via the HEPA filter 1c and the duct 108, and is exhausted. In addition, in the modified example, the blower 102 and the blower 10 are
4 is stored in the same case 110. Case 11
0 may be provided with wheels so that it can be moved freely.

A fourth embodiment of the present invention is shown in FIG. This embodiment is an example in which sample storage chambers are placed on both sides.

The sample storage chamber 206 has a blower 2a and an HE
A PA filter 1a is placed. The clean air supplied from the blower 2a is supplied to the air supply port 208 on the back side of the sample storage chamber 206.
The sample storage chamber 206 is supplied via the sample storage chamber 206. Sample storage room 2
A 1.5ii 203 is provided on the front side of 06. A HEPA filter 201 is provided on the 6 first door 203, and the sample storage chamber 20G is
It is designed to allow the air inside to flow out.

Across the work space formed downstream of the filter 1b,
A sample storage chamber 204 is provided with doors 203 facing each other. Note that 10 is a filter.

A fifth embodiment of the present invention is shown in FIG. In this embodiment, the individual barrier is a filter 1f, and the individual barrier is formed without using the blower 2a. The other configurations are the same as in the third embodiment.

A sixth embodiment of the present invention is shown in FIG.

In this embodiment, one individual barrier is formed using a part of the airflow blown out from the blower 2b. Note that the third door 5 can be slid up and down, and the position of the opening 5a can be moved. Other configurations are the same as those of the third embodiment.1 In this embodiment, the frontage position can be changed while keeping the opening size of the opening 5a constant. is formed from a film-like material, and the opening 3 is formed by winding it upward or downward.
The position of 07 can be moved. Reference numeral 306 denotes a sterilization box, which is filled with a disinfectant solution, and the film-like door 305 is immersed in the box to be sterilized.

〔Effect of the invention〕

According to the present invention, contaminated air in the sample storage chamber does not move to other storage chambers, so alternate contamination can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the first embodiment of the present invention, and Fig. 2 shows the door opening/closing and the ON/OF of the common barrier fan in this embodiment.
A time chart showing the F state, FIG. 3 is a side sectional view of the second embodiment, FIG. 4 is a side sectional view of the third embodiment, and FIG. 5 is a side sectional view of the third embodiment.
FIG. 2 is a vertical cross-sectional view of an example. FIG. 6 is a side sectional view of the first modification of this embodiment, and FIG.
FIG. 8 is a side sectional view of the fifth embodiment, FIG. 9 is a side sectional view of the sixth embodiment, and FIG. 10 is a longitudinal sectional view of the fourth embodiment. Side sectional view. FIG. 11 is a side sectional view of a conventional cleaning cabinet. 1... Filter, 2... Blower No. 1 Nose 2 Mouth" IFF $ 5 Fig. 7 Fig. ε Concave / θ $ / θ Fig. $ll Fig.

Claims (1)

[Claims] 1. A first space for storing a sample, and a second space provided adjacent to the first space, wherein the first space and the second space are connected to each other. A first isolation means is provided between the
A cleaning cabinet characterized in that a second isolation means is provided in the second space. 2. Claim 1, wherein the first space is provided with differential pressure generating means, and the pressure within the first space is set lower than the pressure within the second space by the differential pressure generating means. Clean cabinet as described. 3. Claim 1, wherein the second space is provided with a slidably provided door at its boundary with the outside, and the door is provided with an opening having a certain opening size. Clean cabinet as described.