Safety cabinet

Abstract

To evenly decontaminate the whole of a work chamber in a short time in a safety cabinet.SOLUTION: A safety cabinet comprises slide rails that enable a germicidal lamp unit having a germicidal lamp arranged at a back surface part of a work chamber and a socket member built-therein to move in a vertical direction.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a safety cabinet for use in industrial fields such as medicine, regenerative medicine, and pharmaceuticals. [Background technology]

[0002] The safety cabinet forms a semi-sealed work chamber inside, except for the opening for work, and sucks in contaminated aerosols generated in the work chamber, preventing them from flowing out to the workers. The sucked-in contaminated air is sterilized and purified by a HEPA filter before being exhausted.

[0003] The safety cabinet has a workbench on which work is performed, a front shutter, an internal work surface which, together with the front shutter, surrounds a work chamber, and a blower which supplies air to the work chamber; by moving the front shutter, a work opening is formed between the work chamber and the outside space.

[0004] In addition, in the safety cabinet, a germicidal lamp is provided in the work room to disinfect and decontaminate contaminants such as pathogens after an experiment is completed. This germicidal lamp is attached to the wall that forms the work room (see Patent Document 1).

[0005] Patent Document 1 states that "The device comprises a socket member 11 into which both ends of the germicidal lamp 4 are inserted to support the germicidal lamp 4, and a cover member 15 which covers the upper side of the germicidal lamp 4 and the socket member 11, and the socket member 11 and the cover member 15 are attached to the wall 1 at a downward incline relative to the wall surface 1a, thereby suppressing turbulence in the vertical air current flowing from top to bottom along the wall surface 1a of the wall 1" (see "Summary"). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2022-175180 Summary of the Invention [Problem to be solved by the invention]

[0007] Patent Document 1 describes an installation structure for a germicidal lamp that is attached to a wall along which a vertical airflow flows from top to bottom along the wall surface in order to suppress turbulence in the vertical airflow that flows from top to bottom along the wall surface, and includes a socket member into which both ends of the germicidal lamp are inserted to support the germicidal lamp, and the socket member is attached to the wall at a downward incline relative to the wall surface.

[0008] However, with the method disclosed in Patent Document 1, it is difficult to uniformly decontaminate the entire work room in a short period of time.

[0009] An object of the present invention is to decontaminate the entire work room in a safety cabinet evenly and in a short time. [Means for solving the problem]

[0010] One embodiment of the safety cabinet of the present invention is a safety cabinet equipped with a germicidal lamp for sterilizing the surface of a work table in a work chamber that constitutes a work space, and is characterized in that it has a germicidal lamp unit that is provided at the rear of the work chamber and incorporates the germicidal lamp and a socket member into which both ends of the germicidal lamp are inserted to support the germicidal lamp, and a slide rail that allows the germicidal lamp unit to move in the vertical direction. Effect of the Invention

[0011] According to one aspect of the present invention, in a safety cabinet, the entire work chamber can be decontaminated evenly in a short period of time. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a diagram showing the internal configuration of a safety cabinet according to an embodiment, as viewed from the side. [Diagram 2] FIG. 2 is a front view showing the external appearance of the safety cabinet in the embodiment. [Diagram 3] FIG. 2 is a diagram showing the internal configuration of a safety cabinet during operation in an embodiment, as viewed from the side. [Figure 4] FIG. 2 is a diagram showing the internal configuration of the safety cabinet according to the embodiment, as viewed from the front. [Diagram 5] FIG. 2 is a plan view showing a mounting structure for a germicidal lamp according to an embodiment. [Figure 6] FIG. 2 is a diagram showing the internal configuration of the safety cabinet according to the embodiment, as viewed from the front. [Figure 7] FIG. 2 is a diagram showing the internal configuration of a safety cabinet according to an embodiment, as viewed from the side. [Figure 8] FIG. [Figure 9] FIG. 2 is a diagram showing an example of a flexible hose. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the embodiments will be described with reference to the drawings. EXAMPLES

[0014] Fig. 1 is an internal configuration diagram of a safety cabinet according to an embodiment, as viewed from the side. Fig. 2 is an external front view of the safety cabinet. Fig. 3 is an internal configuration diagram of a safety cabinet during operation, as viewed from the side. Fig. 4 is an internal configuration diagram of a safety cabinet, as viewed from the front.

[0015] The safety cabinet 100 has a work chamber 106 that constitutes a work space. A work opening 104 can be formed on one side of the work chamber 106. By moving a front shutter 105 upward from a closed state, the work opening 104 is formed between the work space 106 and the external space. The front shutter 105 is disposed on the same surface as the work opening 104.

[0016] A workbench 107 on which work is performed is disposed on the bottom surface of the work chamber 106. The surface of the work chamber 106 facing the front shutter 105 is a back surface 106a. A straightening plate 110 is disposed in the upper portion of the work space 106, and a blow-out HEPA filter 101b is disposed above that.

[0017] The blow-out HEPA filter 101b is connected to a pressure chamber 112, and a blower 103 is connected to the pressure chamber 112. When the blower 103 is operated and the pressure chamber 112 is pressurized, purified air is blown out from the blow-out HEPA filter 101b, and the purified air 102 rectified by the rectifying plate 110 is supplied to the working chamber 106.

[0018] The pressure chamber 112 is also connected to the exhaust HEPA filter 101a. By operating the blower 103, part of the air in the pressure chamber 112 is purified by the exhaust HEPA filter 101a and exhausted to the outside of the safety cabinet 100 through the exhaust port 113.

[0019] The safety cabinet 100 needs to draw in the same amount of air as this exhaust volume. This air is the inflow airflow 115 of the work opening 104. The inflow airflow 115 generated at the work opening 104 is drawn in from the work table front air intake 108, passes under the work table 107, and is drawn into the blower 103 through the rear flow path 111. This inflow airflow 115 serves as an air barrier, physically isolating the inside of the work space 106 from the outside of the safety cabinet 100.

[0020] Part of the clean air 102 blown out into the work chamber 106 is sucked in through the workbench front intake port 108 together with the incoming airflow 115, and the other part is sucked into the rear intake port 109, passes through the rear flow path 111, and is sucked into the blower 103.

[0021] In the case of a clean bench, since it does not have an exhaust HEPA filter 101 a, no inflow airflow 115 is generated and clean air 102 is blown out from the work opening 104 .

[0022] When conducting an experiment inside the work chamber 106, an operator can insert his / her hand 117 through the work opening 104 and see the inside of the work chamber 106 through the light transmitting part of the front shutter 105. In the case of the safety cabinet 100, even if contaminated aerosol 114 is handled inside the work chamber 106, the inflow airflow 115 acts as an air barrier and the contaminated aerosol 114 does not leak out of the safety cabinet 100.

[0023] Since contaminated aerosols 114 are handled inside the working chamber 106, it is necessary to disinfect and decontaminate contaminants such as pathogens after an experiment is completed. Even in cell culture for regenerative medicine, which does not use pathogens, it is necessary to disinfect and decontaminate the surface of the work table 107 at the bottom of the working chamber 106 after an experiment is completed to prevent the introduction of germs. For this reason, a germicidal lamp unit 10 is provided to sterilize the surface of the work table 107 in the working chamber 106. The germicidal lamp unit 10 is provided on the back part of the wall of the working chamber 106.

[0024] When the safety cabinet 100 is used, it is operated by an operation control unit 116 which is provided with a switch or the like for turning the operation of the safety cabinet ON or OFF and which is disposed outside the safety cabinet 100 .

[0025] 1, a wall is provided between the rear part 106a of the working chamber 106 of the safety cabinet 100 and the rear flow path 111 to separate them. The clean air 102 blown into the working chamber 106 flows from top to bottom along the wall surface. The germicidal lamp unit 10 is provided on the rear part 106a of such a wall.

[0026] 5, the germicidal lamp unit 10 extends in the left-right direction. The germicidal lamp unit 10 is provided with a socket member 11. In addition, power cables 16 and 17 are connected to the germicidal lamp unit 10.

[0027] The socket members 11 are disposed facing each other and spaced apart in the longitudinal direction (the left-right direction in FIG. 5) of the germicidal lamp unit 10. In addition, both ends of the germicidal lamp 15 are inserted into the tips of the two socket members 11, 11, respectively, and are electrically connected.

[0028] As shown in Figures 6, 7 and 8, the safety cabinet 100 is equipped with a germicidal lamp unit 10 for sterilizing the surface of a work table 107 in a work room 106. The germicidal lamp unit 10 is provided on a rear portion 106a of a wall in the work room 106, and incorporates a germicidal lamp 15 and a socket member 11. The socket member 11 supports the germicidal lamp 15 by inserting both ends of the germicidal lamp 15 into it.

[0029] The germicidal lamp unit 10 is provided in the rear portion 106a of the working chamber 106 such that the germicidal lamp 15 and the socket member 11 are entirely embedded with both ends of the germicidal lamp 15 inserted into the socket member 11.

[0030] As shown in FIG. 8, the germicidal lamp unit 10 has a structure in which the back surface facing the germicidal lamp 15 forms a vertical wall surface, and the portion below the germicidal lamp 119 forms an inclined wall surface.

[0031] The front surface of the germicidal lamp unit 10 forms a flat surface so that the germicidal lamp 15 and the socket member 11 do not protrude entirely into the working chamber 106 from the rear portion 106a.

[0032] The germicidal lamp unit 10 generates a clean air flow 102 that flows through the working chamber 106 from top to bottom along the flat surface, and generates a rear air flow that flows through the rear flow path 111 from bottom to top along the vertical wall surface and the inclined wall surface.

[0033] This effectively prevents airflow fluctuations in the clean air current (vertical air current) flowing from top to bottom along the wall surface in the working chamber 106. Furthermore, airflow fluctuations in the back air current flowing from bottom to top along the back flow passage 111 outside the working chamber 106 can also be effectively prevented.

[0034] 1, a work table front suction port 108 is provided at the bottom of the front part of the working chamber 106. The clean air flow 102 flowing in the working chamber 106 along the flat surface of the germicidal lamp unit 10 passes through the work table front suction port 108 and becomes the rear air flow flowing along the vertical wall surface and the inclined wall surface of the germicidal lamp unit 10.

[0035] 6, 7 and 8, this embodiment has a slide rail 62 that allows the germicidal lamp unit 10 to move up and down. As shown in Fig. 8, the germicidal lamp unit 10 is fixed to the slide rail 62 in a state where it is inserted into a socket member 11 that supports both ends of the germicidal lamp 15.

[0036] In this way, by making it possible to move the germicidal lamp unit 10 vertically via the slide rail 62, it becomes possible to irradiate the necessary parts of the working chamber 106 with germicidal ultraviolet light from the germicidal lamp 15 for the necessary time. This allows the entire interior of the working chamber 106 to be decontaminated evenly in a short time. As a result, work loss is reduced and energy is saved. Here, the slide rail 62 is configured so that the germicidal lamp unit 10 can be moved vertically manually or automatically. The germicidal lamp 15 is configured, for example, with a mercury lamp or multiple LED chips.

[0037] 9, a flexible hose 64 is connected to the germicidal lamp unit 10, and wiring 65 of the germicidal lamp unit 10 (power cables 16, 17 in FIG. 5) is concealed inside the flexible hose 64. When using the germicidal lamp unit 10, the germicidal lamp unit 10 together with the wiring 65 is pulled out from the rear part 106a of the working chamber 106 into the working chamber 106.

[0038] The worker inserts his / her hand 117 through the work opening 104, holds the pulled out germicidal lamp unit 10, and uses the flexible hose 64 to irradiate any location inside the work chamber 106 with germicidal ultraviolet light from the germicidal lamp 15, thereby decontaminating the required location inside the work chamber 106.

[0039] In this way, in the embodiment of the present invention, the movable germicidal lamp mounting structure allows the germicidal lamp to irradiate germicidal UV light to the required area for the required time, which allows the entire interior of the work room to be decontaminated evenly in a short time, reducing work loss and saving energy.

[0040] In addition, due to the above-mentioned decontamination effect, if a germicidal lamp is converted to an LED, it is possible to reduce the number of LED chips, thereby realizing cost reduction.

[0041] In this embodiment, the germicidal lamp mounting structure of the present invention has been described as being applied to a safety cabinet, but the germicidal lamp mounting structure of the present invention is one in which a vertical airflow flows from top to bottom along the wall surface, and the germicidal lamp mounting structure is one that is mounted on a wall, so long as it is an mounting structure for a germicidal lamp that is mounted on a wall, the mounting structure may be applied to a clean bench or other devices. [Explanation of symbols]

[0042] 10 Germicidal lamp unit 11 Socket parts 15 Germicidal lamp 16 Power Cable 17 Power Cable 62 Slide rail 64 Flexible Hose 65 Wiring 100 Safety Cabinet 101a Exhaust HEPA filter 101b HEPA filter for blowing air 103 Blower 104 Working opening 105 Front Shutter 106 Workroom 106a Back part 107 Workbench 108 Workbench front air intake 111 Rear flow passage 112 Pressure Chamber 113 Exhaust port

Claims

1. In a safety cabinet equipped with a germicidal lamp for sterilizing the surface of a work table in a work room constituting a work space, a germicidal lamp unit provided at a rear portion of the working chamber and including the germicidal lamp and a socket member into which both ends of the germicidal lamp are inserted to support the germicidal lamp; A slide rail that allows the germicidal lamp unit to move up and down; A safety cabinet comprising:

2. A flexible hose is connected to the germicidal lamp unit, The wiring of the germicidal lamp unit is concealed inside the flexible hose, 2. The safety cabinet according to claim 1, wherein when the germicidal lamp unit is used, the germicidal lamp unit is pulled out from the rear part of the work chamber together with the wiring into the work chamber.

3. The germicidal lamp unit includes: The germicidal lamp and the socket member are entirely embedded in the rear portion of the working chamber with both ends of the germicidal lamp inserted into the socket member, The germicidal lamp unit includes: The front surface forms a flat surface so that the germicidal lamp and the socket member as a whole do not protrude from the rear portion into the inside of the working chamber, 2. The safety cabinet according to claim 1, wherein the rear surface facing the germicidal lamp outside the work chamber constitutes a vertical wall surface, and the portion below the germicidal lamp constitutes an inclined wall surface.

4. The germicidal lamp unit includes: generating a clean air flow flowing from top to bottom inside the working chamber along the flat surface; 4. The safety cabinet according to claim 3, wherein a back airflow is generated that flows from bottom to top along the vertical wall surface and the inclined wall surface outside the work chamber.

5. The germicidal lamp unit includes:

2. The safety cabinet according to claim 1, wherein a plurality of the safety cabinets are arranged along the surface of the workbench.

6. The socket member is 2. The safety cabinet according to claim 1, wherein the germicidal lamp units are arranged opposite to each other in the longitudinal direction and spaced apart from each other.

7. 2. The safety cabinet according to claim 1, wherein the germicidal lamp is a mercury lamp.

8. 2. The safety cabinet according to claim 1, wherein the germicidal lamp is composed of a plurality of LED chips.

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