Air filtration and positive pressurization system for vehicles in environmentally adverse conditions
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-050/00
출원번호
US-0897418
(2004-07-23)
등록번호
US-7294181
(2007-11-13)
발명자
/ 주소
Smith,Mark C.
출원인 / 주소
Marcor Management, Inc.
대리인 / 주소
Roylance, Abrams, Berdo & Goodman, L.L.P.
인용정보
피인용 횟수 :
12인용 특허 :
4
초록▼
A system and method for providing filtered and pressurized air into a vehicle cab, enclosure or other interior enclosed environment is described, in which a filtered positive pressure air unit comprises a sealed box, a HEPA filter, a blower, a magnahelic, power source and ductwork. Dirty air is draw
A system and method for providing filtered and pressurized air into a vehicle cab, enclosure or other interior enclosed environment is described, in which a filtered positive pressure air unit comprises a sealed box, a HEPA filter, a blower, a magnahelic, power source and ductwork. Dirty air is drawn by the blower through the hose and ductwork to the HEPA filter where a certain percentage of impurities of a certain size or larger are removed. Clean air is discharged at a sufficiently high rate to create a positive pressure inside the interior enclosed environment, keeping clean air in, and dirty air out.
대표청구항▼
I claim: 1. A self-contained, portable positive pressurization/filtering device comprising: an enclosed housing having an air inlet and an air outlet; a high efficiency particulate air (HEPA) filter within the housing adapted to capture substantially all particles in dirty air; an intake conduit co
I claim: 1. A self-contained, portable positive pressurization/filtering device comprising: an enclosed housing having an air inlet and an air outlet; a high efficiency particulate air (HEPA) filter within the housing adapted to capture substantially all particles in dirty air; an intake conduit coupled to said air inlet adapted to accept dirty air from an exterior environment and direct the dirty air to the air inlet of the housing; an exhaust port communicating with the air outlet adapted to exhaust substantially particulate-free clean air into an interior enclosed environment; a fan within said housing adapted to draw in the dirty air from the exterior environment, through the intake conduit and then through the HEPA filter, and exhaust the substantially particulate-free clean air to the interior enclosed environment at a rate sufficient to create a positive pressurization level with respect to an air pressure level of the dirty air in the exterior environment; and a pressure gauge for monitoring atmospheric pressure in the exterior environment and for monitoring air pressure in the enclosed environment, and where said pressure gauge operates the fan at a rate to maintain a positive air pressure in the enclosed environment relative to atmospheric pressure. 2. A portable, self-contained air filtering device for supplying filtered air to a closed environment comprising: a housing having an air inlet and an air outlet; a HEPA filter within the housing at a position between the air inlet and air outlet; a fan within the housing positioned on a downstream side of the filter with respect to a direction of air flow; an intake conduit having a first end coupled to said air inlet of said housing and a second end for drawing in air from outside the closed environment; a pressure sensor for monitoring air pressure within the closed environment and air pressure outside the closed environment and maintaining a positive pressure within the closed environment relative to the air pressure outside the closed environment; and a magnehelic pressure gauge having a positive pressure port communicating with the air in the closed environment and an ambient pressure port communicating with air outside the closed environment. 3. The filtering device of claim 2, wherein said ambient pressure port is connected to a first end of an ambient pressure tube, said ambient pressure tube having a second end at said second end of said intake conduit. 4. The filtering device of claim 3, wherein said ambient pressure tube is coupled to said intake conduit. 5. The filtering device of claim 4, further comprising a seal member coupled to said second end of said intake conduit, said seal member being adapted for fitting in an open window to seal the window. 6. A system for providing a controlled environment, comprising: a closed vehicle cabin structure defining a closed environment; a portable self-contained filtering device for supplying filtered air to the closed environment and maintaining the closed environment at a positive pressure to inhibit infiltration of unfiltered air, said filtering device comprising: a housing having an air inlet and an air outlet; a HEPA filter within the housing at a position between the inlet and the outlet; a fan within the housing positioned on a downstream side of the filter with respect to a direction of air flow; an intake conduit having a first end coupled to said air inlet of said housing and a second end connected to a window of the vehicle and open to ambient air outside said closed structure for drawing in unfiltered air; a pressure sensor for monitoring air pressure within the closed environment and air pressure outside the closed environment for maintaining a positive pressure within the closed environment relative to the air pressure outside the closed environment. 7. The system of claim 6, wherein said pressure sensor is a magnehelic gauge. 8. The system of claim 7, wherein said magnehelic pressure gauge has a positive pressure port communicating with the air in the closed environment and an ambient pressure port communicating with unfiltered air outside the closed environment. 9. The system of claim 8, wherein said ambient pressure port is connected to a first end of an ambient pressure tube, said ambient pressure tube having a second end at said second end of said intake conduit. 10. The system of claim 9, wherein said ambient pressure tube is coupled to said intake conduit. 11. The system of claim 10, further comprising a seal member coupled to said second end of said intake conduit, said seal member being adapted for fitting in said window to seal the window.
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이 특허에 인용된 특허 (4)
Ikari Masanori (Iruma JPX), Air conditioning device installed in a cabin of an earth-moving vehicle.
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