# US 10,874,012 B2 · Biosafety cabinet and clean air device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,874,012 B2 - Document ID: US10874012B2 - Status: Granted - Kind: B2 - Application number: 16/325,242 - Filed: 2017-04-24 - Published: 2019-07-04 - Granted: 2020-12-22 - Earliest claimed: 2016-10-19 - Assignees: Hitachi Industrial Equipment Systems Co., Ltd. - Applicants: Hitachi Industrial Equipment Systems Co., Ltd. - Inventors: Takeshi Kaneko; Hirotoshi Sato - Web page: https://patentgrep.com/patent/US10874012B2 ## CPC - H05F 3/06: by means of ionising radiation - A61G 10/00: Treatment rooms {or enclosures} for medical purposes (baby incubators, couveuses A61G11/00; devices for gas baths with ozone, hydrogen or the like A61H33/14 {; for isolating individuals from external stimuli A61M21/0094} ; containers or portable cabins for affording breathing protection in general A62B31/00) - 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 37/00: {Means for sterilizing, maintaining sterile conditions or avoiding chemical or biological contamination (C12M23/38 takes precedence; filtration in general and filters per se B01D24/00-B01D41/00; autoclaves B01J3/04; treatment of microorganisms with electrical or wave energy C12N13/00)} - F24F 7/06: with forced air circulation, e.g. by fan {positioning of a ventilator in or against a conduit} - B01D 46/4209: {Prevention of static charge, e.g. by grounding} - B01D 2279/51: in clean rooms, e.g. production facilities for electronic devices, laboratories - B01L 2200/082: Handling hazardous material - B01L 2200/085: Protection against injuring the user - H05F: STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY - A61G: TRANSPORT, PERSONAL CONVEYANCES OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS (appliances for aiding patients or disabled persons to walk A61H3/00); OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES (embalming corpses A01N1/00) - 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} - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract The purpose of the present invention is to provide a clean air device that can reduce the risk of contamination due to static electricity. Provided is a biosafety cabinet or a clean air device that connects a biosafety cabinet and a clean booth, wherein a static eliminator (ionizer) that generates a corona discharge by way of concentrating an electric field on a needle-shaped discharge electrode and eliminates static with ionized air is disposed directly above an air flow branching point where air supplied to a work space branches to the front face and to rear face inside the biosafety cabinet. ## Claims ### Claim 1 A biosafety cabinet comprising: a work space formed on an inner surface side of a front shutter; a circulation passage formed from a lower surface side, a lateral surface side and a rear surface side of the work space, and an outer part of the biosafety cabinet for discharging air having flown into the work space, and an air supplier disposed on an upper surface of the work space for supplying air to the work space, characterized in that an ionizer is provided right above an airflow branch point where the air supplied to the work space branches toward a front surface and a rear surface of the biosafety cabinet. ### Claim 2 (depends on 1) The biosafety cabinet according to claim 1, characterized in that a working table is disposed on a lower surface of the work space, and the airflow branch point is a point where the air supplied to the work space branches toward the front surface and the rear surface of the biosafety cabinet near the working table. ### Claim 3 (depends on 1) The biosafety cabinet according to claim 1, characterized in that an input port of a waste can is arranged in a straight line joining the ionizer and a rear surface slit of the biosafety cabinet. ### Claim 4 (depends on 1) The biosafety cabinet according to claim 1, characterized in that the biosafety cabinet includes a first rear surface slit, and a second rear surface slit located at a predetermined height from the first rear surface slit. ### Claim 5 (depends on 1) A clean air device comprising: the biosafety cabinet according to claim 1; a clean booth; and a pass box connecting the clean booth and the biosafety cabinet, characterized in that a slit is provided in the pass box. ### Claim 6 (depends on 5) The clean air device according to claim 5, characterized in that a partition member is provided at a central part on an upper surface of the pass box, and the slit is provided at an upper portion on a closer side to the clean booth than the partition member in the pass box.