# US 11,896,729 B2 · UV disinfection system

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- Number: US 11,896,729 B2
- Document ID: US11896729B2
- Status: Granted
- Kind: B2
- Application number: 18/000,262
- Filed: 2021-05-28
- Published: 2023-08-03
- Granted: 2024-02-13
- Earliest claimed: 2020-06-01
- Assignees: CAO Group, Inc.
- Applicants: CAO Group, Inc.
- Inventors: Densen Cao
- Web page: https://patentgrep.com/patent/US11896729B2

## CPC

- A61L 2/10: Ultraviolet [UV] radiation
- C02F 1/32: with ultraviolet light
- A61L 2202/12: Apparatus for isolating biocidal substances from the environment
- A61L 2202/122: Chambers for sterilisation
- A61L 2202/14: Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
- C02F 2209/05: Conductivity or salinity
- C02F 2209/44: Time
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

An UV disinfection system (200) may feature a chamber (207) with internal spherical reflective surfaces (208) to evenly reflect UV radiation from all angles to direct the UV radiation to all surface area of the object inside the chamber to disinfect object utilizing UV radiation under controlled time. An object (215) to be disinfected may reside within the chamber (207) on a UV transparent rack or shelf (214). The spherical reflective surfaces may be fashioned by placing such surfaces on a polyhedral internal structure or making the internal chamber spherical in and of itself (208). Multiple UV sources (209a), (209b) may also be utilized.

## Claims

### Claim 1

A disinfecting system comprising:
a housing defining a polyhedral internal chamber, defined by a plurality of internal faces, with an internal surface, said internal surface further comprising at least one reflective spherical component, said at least one reflective spherical component further comprising at least one semi-spherical reflector positioned on each internal face;
at least one source of UV radiation configured to emit UV radiation into the internal chamber;
wherein the UV radiation is reflected off the internal surface of the internal chamber in a manner to strike all exposed surfaces of an object contained within the internal chamber.

### Claim 2 (depends on 1)

The disinfecting system of claim 1, the spherical component of internal chamber being that the internal chamber itself is spherical.

### Claim 3 (depends on 1)

The disinfecting system of claim 1, further comprising a light power sensor to detect light intensity.

### Claim 4 (depends on 1)

The disinfection system of claim 1, further comprising a light transparent rack within the internal chamber to hold the objects intended to be disinfected.

### Claim 5 (depends on 1)

The disinfection system of claim 1, the source of UV radiation being selected from the set of UV emission sources consisting of: at least one LED or at least one Mercury lamp.

### Claim 6 (depends on 1)

The disinfection system of claim 1, further comprising a display to show system operating status.

### Claim 7 (depends on 1)

The disinfection system of claim 1, further comprising a door to provide access into the internal chamber.

### Claim 8 (depends on 1)

The disinfection system of claim 1, further comprising a door interlock system operably connected to the at least one source of UV radiation such that activation of the door interlock system is accomplished when the door is closed, and such activation is required to activate the at least one source of UV radiation.

### Claim 9 (depends on 1)

The disinfection system of claim 1, further comprising a control system to control the emitted UV radiation and disinfection time.