Safety cabinet

Abstract

To effectively prevent vertical air currents flowing from top to bottom inside a work chamber and back-side air currents flowing from bottom to top outside the work chamber from varying in a safety cabinet.SOLUTION: A germicidal lamp unit has a structure in which a front surface of the unit constitutes a flat surface that prevents a germicidal lamp and the whole of a socket member from protruding from a back surface part into a work chamber and a deep surface of the unit opposing to the germicidal lamp, outside the work chamber, constitutes a vertical wall surface and a portion lower than the germicidal lamp constitutes an inclined wall surface.SELECTED DRAWING: Figure 8

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, in Patent Document 1, it is difficult to effectively prevent airflow fluctuations of the vertical airflow flowing from top to bottom inside the work chamber and airflow fluctuations of the back airflow flowing from bottom to top outside the work chamber.

[0009] The object of the present invention is to effectively prevent airflow fluctuations of the vertical air current flowing from top to bottom inside a work chamber and airflow fluctuations of the back air current flowing from bottom to top outside a work chamber in a safety cabinet. [Means for solving the problem]

[0010] One embodiment of the present invention provides a safety cabinet equipped with a germicidal lamp for sterilizing the surface of a workbench in a work chamber that constitutes a working space, the safety cabinet comprising a germicidal lamp unit that is provided at the rear part of the work chamber and incorporates the germicidal lamp and a socket member, the socket member supports the germicidal lamp by inserting both ends of the germicidal lamp into the socket member, the germicidal lamp unit is provided at the rear part of the work chamber such that the germicidal lamp and the entire socket member are embedded with both ends of the germicidal lamp inserted into the socket member, the germicidal lamp unit has a front surface that forms a flat surface such that the germicidal lamp and the entire socket member do not protrude from the rear part into the work chamber, and the germicidal lamp unit has a structure in which the rear surface facing the germicidal lamp outside the work chamber forms a vertical wall surface and the portion below the germicidal lamp forms an inclined wall surface. Effect of the Invention

[0011] According to one aspect of the present invention, in a safety cabinet, airflow fluctuations of the vertical airflow flowing from top to bottom inside the work chamber and airflow fluctuations of the back airflow flowing from bottom to top outside the work chamber can be effectively prevented. [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. 2 is an enlarged cross-sectional view of a mounting portion of a germicidal lamp according to an embodiment. [Figure 9] FIG. 8 is a detailed view of part A shown in FIG. 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 is formed on one side of the work chamber 106. The work opening 104 is formed between the work chamber 106 and the external space by moving the front shutter 105 upward from a closed state. 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 on the top of the work chamber 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 room 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 the 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 the 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 portion 106a 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 100 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] As shown in FIG. 5, the germicidal lamp unit 10 extends in the left-right direction.

[0027] 5, 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.

[0028] 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. Both ends of the germicidal lamp 15 are inserted into the tips of the two socket members 11, 11, respectively, for electrical connection.

[0029] As shown in Figures 6, 7, 8 and 9, the safety cabinet 100 is equipped with a germicidal lamp unit 10 for sterilizing the surface of a work table 107 in a work chamber 106. The germicidal lamp unit 10 is provided on a rear portion 106a of a wall of the work chamber 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.

[0030] 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.

[0031] 8, the germicidal lamp unit 10 has a structure in which the rear surface facing the germicidal lamp 15 forms a vertical wall surface, and the portion below the germicidal lamp 119 forms an inclined wall surface. The front surface of the germicidal lamp unit 10 forms a flat surface such that the germicidal lamp 15 and the socket member 11 as a whole do not protrude into the working chamber 106 from the rear surface portion 106a.

[0032] In this way, because the front surface of the germicidal lamp unit 10 forms a flat surface, the germicidal lamp unit 10 can be installed at any position in the vertical direction on the wall of the rear portion 106a of the work chamber 106. In particular, by arranging the germicidal lamp unit 10 near the surface of the work table 107 of the work chamber 106, germicidal ultraviolet light can be irradiated from the germicidal lamp 15 at a close distance to the sterilizable surface. As a result, reduced work loss and energy saving effects can be achieved through highly efficient decontamination.

[0033] 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.

[0034] 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.

[0035] A slit plate 60 is provided at the bottom of the front part of work chamber 106 facing rear part 106a. The germicidal UV light irradiated from germicidal lamp 15 is reflected by slit plate 60 and directed toward front shutter 105. A gap is provided below front shutter 105, and slit plate 60 is positioned so that the reflected germicidal UV light does not leak through the gap. In this way, by providing slit plate 60, the test environment and the protection of workers can be achieved by preventing leakage of the germicidal UV light.

[0036] 1, a workbench front suction port 108 is provided at the bottom of the front part of the working chamber 106. The clean air flow 102 flowing inside the working chamber 106 along the flat surface of the germicidal lamp unit 10 passes through the workbench 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.

[0037] As shown in Fig. 6, multiple germicidal lamp units 10 are arranged along the surface of the workbench 107. The germicidal lamps 15 are configured, for example, with mercury lamps or multiple LED chips. The germicidal lamp units 10 are attached to the rear surface portion 106a via guide members 61 for protecting the germicidal lamps 15.

[0038] In the embodiment of the present invention, a germicidal lamp mounting structure that does not protrude into the working chamber allows the germicidal lamp unit to be located below the working chamber, which makes it possible to irradiate germicidal ultraviolet light at a close distance from the sterilizing surface, thereby reducing work loss and achieving energy saving effects through highly efficient decontamination.

[0039] In addition, due to the highly efficient decontamination effect, if the germicidal lamp is converted to an LED, the number of LED chips can be reduced, resulting in lower costs.

[0040] In addition, the embodiment of the present invention can effectively prevent the airflow fluctuation of the clean airflow (vertical airflow) flowing from top to bottom inside the work chamber along the wall surface. Furthermore, the airflow fluctuation of the back airflow flowing from bottom to top along the back flow passage outside the work chamber can also be effectively prevented.

[0041] Furthermore, in the embodiment of the present invention, the test environment and operator protection can be achieved by preventing leakage of germicidal ultraviolet light.

[0042] 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]

[0043] 10 Germicidal lamp unit 11 Socket parts 15 Germicidal lamp 16 Power Cable 17 Power Cable 60 Slit plate 61 Guide member 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 is provided at a rear part of the working chamber and has the germicidal lamp and a socket member built therein, The socket member is The two ends of the germicidal lamp are inserted to support the germicidal lamp, 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, A safety cabinet characterized in that, outside the work chamber, a rear surface facing the germicidal lamp constitutes a vertical wall surface, and a portion below the germicidal lamp constitutes an inclined wall surface.

2. The germicidal lamp unit includes: generating a clean air flow flowing from top to bottom inside the working chamber along the flat surface; 2. The safety cabinet according to claim 1, 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.

3. A work table front suction port is provided at a lower part of the front part of the work chamber, 3. The safety cabinet according to claim 2, wherein the clean air flow flowing inside the work chamber along the flat surface of the germicidal lamp unit passes through the work table front suction port and becomes the rear air flow flowing outside the work chamber along the vertical wall surface and the inclined wall surface of the germicidal lamp unit.

4. A slit plate is provided at the lower part of the front part of the working chamber, The germicidal ultraviolet light emitted from the germicidal lamp is reflected by the slit plate toward the front shutter, A gap is provided below the front shutter, The slit plate is 2. The safety cabinet according to claim 1, characterized in that the gap is disposed so that the reflected germicidal ultraviolet light does not leak through the gap.

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 germicidal lamp unit includes:

2. The safety cabinet according to claim 1, wherein the safety cabinet is attached to the rear portion via a guide member that protects the germicidal lamp.

7. 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.

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

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

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