Drug-containing capsule, and component for air treatment device

Patent metadata

Field	Value
Publication number	US-11583601-B2
Application number	US-202017003413-A
Country	US
Kind code	B2
Filing date	Aug 26, 2020
Priority date	Mar 29, 2018
Publication date	Feb 21, 2023
Grant date	Feb 21, 2023

Abstract

A drug-containing capsule ( 20, 30, 40 ) includes a capsule material ( 21, 31, 41 ) and a drug ( 22, 32, 42 ) disposed within the capsule material ( 21, 31, 41 ) and having a sterilization action for a specific microorganism. The capsule material ( 21, 31, 41 ) includes a degradable part ( 21 a, 31 a, 41 a ) formed of a raw material that is caused to biodegrade by the specific microorganism. This results in suppression of release of the drug while the specific microorganism does not proliferate.

First claim

The invention claimed is:

1. An air treatment device having an interior portion that includes an antimicrobial film wherein:
the air treatment device has an outer casing that encloses an interior portion that includes components comprising at least a fan, a heat exchanger and a filter, wherein the interior portion and components have a surface of metal or a resin,
a corrosion resistant layer comprising a resin, the resin being disposed on one or more of the interior portion or component surfaces; and
an antimicrobial film wherein the antimicrobial film is disposed on the corrosion resistant layer and the antimicrobial film comprises a hydrophilic layer comprising a resin, wherein the
wherein the hydrophilic layer contains antimicrobial capsules that comprise,
an outer layer capsule material of one or more layers of caprolactone or a polymer including ethylene adipate, wherein the capsule material that degrades upon exposure to certain microorganisms, and
an active material disposed within the outer layer capsule material, wherein the active material comprises at least one of a fungicide, bactericide or plant essential oil that kills the microorganisms.

2. The air treatment device according to claim 1 , wherein the microorganism is a mold, a yeast, or a bacterium proliferating in the air treatment device.

3. The air treatment device according to claim 2 ,
wherein the mold includes at least one of Penicillium molds, Cladosporium molds, Aspergillus molds, Toxicocladosporium molds, Engyodontium molds, Aureobasidium molds, Alternaria molds, Paecilomyces molds, Tricoderma molds, Nigrospora molds, Chaetomium molds, Ulocladium molds, Fusarium molds, Eurotium molds, Curvularia molds, Rhodotorula molds, Chaetomium molds, Mucor molds, and Rhizopus molds,
the yeast includes at least one of true fungi that are collectively called yeast, and
the bacterium includes at least one of Arthrobacter bacteria, Baccilus bacteria, Serratia bacteria, and Staphylococcus aureus.

4. The air treatment device according to claim 1 ,
wherein the capsule material comprises a plurality of encapsulating layers, and
the active material is disposed within each of the encapsulating layers.

5. The air treatment device according to claim 1 ,
wherein the hydrophilic layer of the film contains a plurality of different types of the antimicrobial capsules having capsule material layers that differ with respect to thickness from other antimicrobial capsules.

Assignees

• Daikin Ind Ltd

Inventors

• DONOSHITA Yuka
• Sakamoto Masako

Classifications

• A01P3/00

  Fungicides · CPC title

• A01P1/00

  Disinfectants; Antimicrobial compounds or mixtures thereof · CPC title

• A01N25/26

  in coated particulate form · CPC title

• A01N25/34

  Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group · CPC title

• F28F2245/00

  Coatings; Surface treatments · CPC title