# US 2024/0189809 A1 · Safety cabinet

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- Number: US 2024/0189809 A1
- Document ID: US20240189809A1
- Status: Published application
- Kind: A1
- Application number: 17/615,969
- Filed: 2021-06-15
- Published: 2024-06-13
- Earliest claimed: 2021-06-15
- Assignees: Hitachi Industrial Equipment Systems Co., Ltd.
- Applicants: Hitachi Industrial Equipment Systems Co., Ltd.
- Inventors: Takeshi MATSUMURA; Takeshi KANEKO
- Web page: https://patentgrep.com/patent/US20240189809A1

## CPC

- B01L 1/00: Enclosures; Chambers (provided with manipulation devices or glove boxes B25J21/00)
- B01L 1/02: Air-pressure chambers; Air-locks therefor
- B01L 1/04: Dust-free rooms or enclosures
- B01L 1/50: {for storing hazardous materials in the laboratory, e.g. cupboards, waste containers (sample containers B01L3/50)}
- C12M 1/00: Apparatus for enzymology or microbiology
- B01L 2200/082: Handling hazardous material
- B01L 2200/085: Protection against injuring the user
- B01L: CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- C12M: APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; {APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS}

## Abstract

A safety cabinet has an opening portion in the front surface of a work room and a front shutter and supplies clean air to the work room from above. A side slit is provided in the side surface of the work room, air from the provided side slit joins an air flow path suctioned from a front grille of a workbench forming the bottom surface of the work room, and the turbulence of an airstream can be prevented even when a device is installed in the work room.

## Claims

### Claim 1

A safety cabinet comprising:
a work room formed inside a front shutter, the safety cabinet suctioning air in the work room, cleaning the air, supplying the air to the work room in part, and exhausting the air in part;
a workbench configuring a bottom surface of the work room;
a lower flow path configured by the workbench and a part of the safety cabinet;
a side flow path configured by a side surface of the work room and a part of a side surface of the safety cabinet;
a back flow path configured by a back surface of the work room and a part of a back surface of the safety cabinet;
a circulation flow path formed by at least the lower flow path, the side flow path, and the back flow path; and
a slit in the side surface of the work room,
wherein an airstream from the work room is suctioned from side slits, passes through a side chamber, and joins the lower flow path.

### Claim 2 (depends on 1)

The safety cabinet according to claim 1, comprising a side chamber allowing the airstream suctioned from the side slit to flow to the lower flow path,
wherein the side chamber and the lower flow path have the same pressure.

### Claim 3 (depends on 2)

The safety cabinet according to claim 2, comprising a connecting portion for connection to an external device and a connecting portion slit for forming an air barrier in the connecting portion on a right or left side of the work room,
wherein the side slit and the side chamber are provided on a surface of the work room facing the connecting portion to seek right-left balance of the airstream in the work room.

### Claim 4 (depends on 2)

The safety cabinet according to claim 2, wherein the side slit is provided at a position lower than height of a device installed in the work room.

### Claim 5 (depends on 3)

The safety cabinet according to claim 3, wherein
the connecting portion slit is provided around the connecting portion and suctions a part of a blowout airstream in the work room, and
the number of the provided side slits is a number at which the same amount of blowout airstream as the connecting part slit is suctioned.

### Claim 6 (depends on 5)

The safety cabinet according to claim 5,
the side slit is a configuration having one upper stage and one lower stage in the work room.