Photo-electronic air purifying disinfector

• US 7,364,605 B2
• Filed: 07/14/2005
• Issued: 04/29/2008
• Est. Priority Date: 07/19/2004
• Status: Active Grant

• Current Assignee: John Manufacturing Limited
• Original Assignee: John Manufacturing Limited
• Inventors: Yuen, John Se-Kit
• Primary Examiner(s): Chiesa; Richard L.
• Application Number:
  US11/180,593
• Publication Number:
  US 20060018805A1
• Time in Patent Office: 1,020 Days
• Field of Search: 422/24, 422/121, 422/186.04, 422/186.3, 96/16, 962/24, 96/63
• US Class Current: 96/16
• CPC Class Codes: A61L 9/20 Ultraviolet radiation
• CPC Class Codes: A61L 9/22 Ionisation
• CPC Class Codes: B03C 3/016 by acoustic or electromagnetic energy, e.g. ultraviolet light
• CPC Class Codes: B03C 3/155 Filtration
• CPC Class Codes: F24F 8/194 by filtering using high voltage
• CPC Class Codes: F24F 8/22 using UV light
• CPC Class Codes: F24F 8/30 by ionisation
• CPC Class Codes: F24F 8/80 Self-contained air purifiers
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

A photo-electronic air purifying disinfector firstly filters out airborne impurities using a washable filter screen. It then utilizes an activated carbon filter to filter out airborne bacteria and germs. The bacteria and germs which are capable of passing through the activated carbon filter are then eliminated by extreme-UV light emitted by extreme-UV light tubes. It also utilizes a negative ion generator to boost the level of anions in the air before being discharged. These two modes operate in the following manner: the first mode involves cathodic high-voltage output that is discharged via a carbonized fibre. The ionized air is then expelled by a fan. The second mode eliminates bacteria, germs and mould from air as it passes extreme-UV light tubes by exposure to extreme-UV light emitted by these extreme-UV light tubes.

Claims

1. A photo-electronic air purifying disinfector comprising a housing containing a turbine extractor, an electronic motor for driving the turbine extractor to produce an airflow, one or more extreme-UV light tubes, one or more air arresting units, a power supply cable, a cathodic high-voltage carbonized fibre and an activated carbon filter, wherein the one or more air arresting units concentrates or deflects the airflow into a slot containing a respective one of the one or more extreme-UV light tubes.

2. The disinfector according to claim 1, wherein the housing has a generally square-column shape.

3. The disinfector according to claim 1, wherein the housing also contains an electrical circuit board, switches and indicator lights for controlling the operation of the disinfector.

4. The disinfector according to claim 1, wherein the air arresting unit has a front and a back light shield, which prevent extreme-UV light from escaping from the housing, thus protecting the user'"'"'s eyes.

5. The disinfector according to claim 1, wherein the one or more extreme-UV light tubes are removable and may be replaced.

6. The disinfector according to claim 1, wherein the filter is removable and may be replaced.

7. The disinfector according to claim 1, wherein the housing has a hand hold which allows easy manhandling, and in addition the disinfector may be hung on a wall.

8. An electrical circuit system that is capable of improving specific characteristics of the environment, specifically for use in purifying indoor air and increasing the level of anions contained in the air, wherein the electrical circuit system includes:

a negative ion generating circuit for a cathodic high-voltage carbonized fibre; and

a circuit which enables the emission of UV light at the wavelength of 253.7 nm from one or more extreme-UV light tubes;

wherein the electrical circuit system has first and second modes, the first mode involving cathodic high-voltage output discharged via the cathodic high-voltage carbonized fibre, the ionized air containing the anions then being expelled by a turbine extractor;

the second mode involving turning on the one or more extreme-UV light tubes which emit extreme-UV light eliminating airborne bacteria, germs and mould as they pass the tubes, and the electrical circuit system in addition allows a user to choose to operate in the first mode or in the second mode separately, to choose continuous simultaneous operation or to choose operation of the two modes in a continuous alternating cycle.

9. The electrical system according to claim 8, wherein a value of the cathodic high-voltage output is within the range of 4.5 kV to 8.5 kV.