Ultraviolet area sterilizer and method of area sterilization using ultraviolet radiation
DC CAFCFirst Claim
1. A method of sterilizing an area using ultraviolet radiation, comprising the steps of:
- (a) causing ultraviolet-C radiation to be emitted within an enclosed area;
(b) measuring a reflection of ultraviolet-C radiation from each of multiple points within said enclosed area;
(c) calculating the ultraviolet-C radiation level necessary to sterilize said enclosed area and comparing it with the measured reflected ultraviolet-C radiation;
(d) terminating the emission of ultraviolet-C radiation after determining that the required minimum ultraviolet-C radiation has been reflected from each of said multiple points within said enclosed area.
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Abstract
An ultraviolet area sterilizer (UVAS) is mobile or stationary. The UVAS is positioned in a room, such an operating room or intensive care unit. Motion detectors sense movement, to assure that personnel have evacuated the space to be sterilized. Subsequently, UV-C generators, such as a bank of mercury bulbs, generate intense levels of UV-C. An array of multiple UV-C sensors scan the room, and determine the darkest area, or the area reflecting the lowest level of UV-C back to the sensors. A BASIC Stamp contained in the device calculates the time required to obtain a bactericidal dose of UV-C reflected back from darkest area. Once a bactericidal dose has been reflected to all the sensors, the unit notifies the operator and shuts down. By relying on reflected doses rather than direct exposure, the UVAS is able to sterilize or sanitize all surfaces within the room that are within view of an exposed wall or ceiling.
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Citations
20 Claims
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1. A method of sterilizing an area using ultraviolet radiation, comprising the steps of:
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(a) causing ultraviolet-C radiation to be emitted within an enclosed area;
(b) measuring a reflection of ultraviolet-C radiation from each of multiple points within said enclosed area;
(c) calculating the ultraviolet-C radiation level necessary to sterilize said enclosed area and comparing it with the measured reflected ultraviolet-C radiation;
(d) terminating the emission of ultraviolet-C radiation after determining that the required minimum ultraviolet-C radiation has been reflected from each of said multiple points within said enclosed area. - View Dependent Claims (2)
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3. A device for sterilizing an area using ultraviolet radiation, comprising:
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(a) a base;
(b) a plurality of ultraviolet-C radiation emitters, wherein said plurality of ultraviolet-C radiation emitters are positioned on said base to emit ultraviolet-C radiation 360 degrees around said base and above said base;
(c) at least one radiation sensor which is attached to said base which receives reflected ultraviolet-C radiation from multiple points in an area that is external to the device, wherein said sensor measures said reflected ultraviolet-C radiation. - View Dependent Claims (4, 5)
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6. A method of disinfecting an area using ultraviolet radiation, comprising the steps of:
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(a) causing an emission of ultraviolet-C radiation within an enclosed area;
(b) providing at least one sensor that receives only reflected ultraviolet-C radiation from said emission of ultraviolet-C radiation;
(c) measuring a level of reflected ultraviolet-C radiation received by said at least one sensor; and
(d) terminating the emission of ultraviolet-C radiation upon determining that a cumulative level of reflected ultraviolet-C radiation has been received by said at least one sensor. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A device for disinfecting an area using ultraviolet radiation, comprising:
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(a) at least one ultraviolet-C emitter which emits ultraviolet-C radiation which is subsequently reflected by a surface in the area; and
(b) at least one ultraviolet-C radiation sensor that is positioned relative to said at least one ultraviolet-C emitter to receive only reflected ultraviolet-C radiation. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification