Apparatus for removing stink

• US 4,954,465 A
• Filed: 01/11/1989
• Issued: 09/04/1990
• Est. Priority Date: 01/22/1988
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Tsunoda, Teruo, Kawashima, Masaei, Tanaka, Koosuke, Ogawa, Syozo, Naka, Reishi, Kashiwabuchi, Masaaki, Kameda, Miyakichi, Suenaga, Nobuyoshi
• Primary Examiner(s): Capossela, Ronald C.
• Application Number:
  US07/295,754
• Time in Patent Office: 601 Days
• Field of Search: 62/264, 502/5, 502/182, 502/183, 502/417
• US Class Current: 502/5
• CPC Class Codes: A61L 9/20 Ultraviolet radiation
• CPC Class Codes: B01D 2255/802 Photocatalytic
• CPC Class Codes: B01D 53/86 Catalytic processes
• CPC Class Codes: B01D 53/8668 Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
• CPC Class Codes: F25D 17/042 Air treating means within refrigerated spaces air conditioning in general F24F
• CPC Class Codes: F25D 2317/0415 by deodorizing
• CPC Class Codes: F25D 2317/0417 using an UV-lamp
• CPC Class Codes: F25D 2317/0681 Details thereof

Abstract

A photocatalystic decomposing apparatus comprises absorbent including honeycomb form active carbon and titanium oxide acting as photocatalyst applied to a surface of the active carbon, and a light source for generating ultraviolet rays exciting the photocatalyst. Stink ingredient is absorbed to the active carbon by passing air flow through openings in the honeycomb, and the absorbed stink ingredient is decomposed by exciting the photocatalyst due to application of the ultraviolet rays.

Claims

1. A stink removing apparatus using absorbent, comprising a member in which photocatalyst is applied on a surface of said absorbent for absorbing stink ingredient or as mixed and kneaded with said absorbent, said photocatalyst decomposing the stink ingredient absorbed on said absorbent when excited by light and a light source for exciting said photocatalyst.

2. A stink removing apparatus according to claim 1, wherein said absorbent is formed as a honeycomb form, and said photocatalyst is excited while passing air flow through apertures of the honeycomb form.

3. A stink removing apparatus according to claim 1, wherein said absorbent is formed as a honeycomb form, and the stink ingredient is collected by absorbing it to said absorbent while passing air flow through apertures of the honeycomb form, and said photocatalyst is intermittently excited.

4. A stink removing apparatus according to claim 1, wherein said absorbent comprises simple substance or composite of active carbon, zeolite, porous ceramics or silica gel.

5. A stink removing apparatus according to claim 1, wherein said photocatalyst comprises simple substance or composite of metallic oxide such as titanium oxide, tungsten oxide, zinc oxide and the like.

6. A stink removing apparatus according to claim 1, wherein the photocatalyst having a particle diameter sufficiently larger than pores in said absorbent is applied to the surface of said absorbent.

7. A stink removing apparatus according to claim 1, wherein said exciting source is arranged in the proximity of a high absorbing density area of said absorbent.