Air filtering fixture

• US 5,443,625 A
• Filed: 01/18/1994
• Issued: 08/22/1995
• Est. Priority Date: 01/18/1994
• Status: Expired due to Fees

• Current Assignee: John M. Schaffhausen
• Original Assignee: John M. Schaffhausen
• Inventors: Schaffhausen, John M.
• Primary Examiner(s): Bushey, C. Scott
• Application Number:
  US08/181,838
• Time in Patent Office: 581 Days
• Field of Search: 55/385.2, 55/470, 55/471, 55/472, 55/473, 55/481, 55/493, 55/385.1, 55/467, 55/501, 55/DIG. 18, 55/DIG. 36, 95/273
• US Class Current: 95/113
• CPC Class Codes: B01D 2273/30 Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
• CPC Class Codes: B01D 46/0005 Mounting of filtering elements within casings, housings or frames B01D46/2422 takes precedence
• CPC Class Codes: B01D 46/0006 Filter elements or cartridges installed in a drawer-like manner
• CPC Class Codes: B01D 46/10 Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
• CPC Class Codes: B01D 46/64 arranged concentrically or coaxially
• CPC Class Codes: F21V 33/0096 Fans, e.g. ceiling fans forced cooling of lighting devices characterised by the arrangement of fans F21V29/67
• CPC Class Codes: F24F 1/0071 with means for purifying supplied air perfuming or deodorising means F24F1/008
• CPC Class Codes: F24F 8/10 by separation, e.g. by filtering
• CPC Class Codes: F24F 8/108 using dry filter elements
• CPC Class Codes: F24F 8/158 using active carbon
• CPC Class Codes: F24F 8/97 for removing tobacco smoke

Abstract

The air filtering fixture is for suspension from the ceiling of a room to filter out unwanted tobacco smoke. The fixture has a housing formed of peripheral walls defining a generally vertical air path. The housing has an upper compartment portion and a lower flared hood portion. An air filter assembly is located within the upper compartment and a lighting assembly is situated within the hood portion below the filter assembly. At least one fan assembly is located above the filter assembly in the upper compartment. The fixture intakes air through a bottom opening in the flared hood portion and propels the air as an air stream upwardly out of a top opening in the upper compartment and toward the ceiling. A toroidal air movement about the housing is facilitated which induces unfiltered air laterally external to the housing to move downwardly from above the housing and enter the bottom opening to be filtered. An access opening in the housing permits easy filter replacement.

Claims

1. An air filtering fixture for mounting in spaced relationship from the ceiling of a room and in an elevated condition above an area where persons may congregate, comprising:

a housing having peripheral walls comprised of upper compartment walls and lower hood walls below said upper compartment walls, said lower hood walls having a horizontal upper edge, said peripheral walls defining a generally vertical air path for an upwardly moving air stream, said vertical air path being centrally located in said housing, said housing having a horizontal bottom opening defining an air intake mouth and a horizontal top opening defining an air exhaust for directing air upwardly from said housing, said top opening being centrally located vertically above said bottom opening, said upper compartment peripheral walls being generally vertically oriented and said lower hood peripheral walls being slanted in a downward and outward direction from said upper compartment walls to said air intake mouth, said upper compartment peripheral walls having a horizontally oriented access opening therethrough at a location above but proximate to said horizontal upper edge of said lower hood walls,

a horizontally oriented air filter removably mounted in the interior of said housing within said upper compartment peripheral walls and extending transversely of said vertical air path for filtering contaminants out of the upwardly moving air stream, said air filter being slidably removable in a horizontal direction through said horizontally oriented access opening, and

air propulsion means mounted in said housing above said horizontally oriented air filter and comprising a centrally located motor, two axial flow fan assemblies laterally spaced from said motor, and a belt system for transmitting power from said motor to said axial flow fan assemblies, said motor and said axial flow fan assemblies being in a substantially balanced arrangement in said fixture to minimize the effect of any vibration tendencies on said fixture, said air propulsion means being for pulling air from below said housing upwardly through said air intake mouth and through said air filter and propelling the air as an air stream out of said top opening toward the ceiling so as to thereby form a toroidal air movement about said peripheral walls of said housing, with air within said housing moving upwardly and air laterally external to said housing induced to move downwardly and enter said air intake mouth by virtue of the displacement of air caused by the exhaust air stream above said housing.

2. The fixture of claim 1 additionally comprising light emitting means mounted on said housing for projecting light downwardly therefrom.

3. The fixture of claim 2 wherein said light emitting means is located within said housing and below said air filter.

4. The fixture of claim 1 additionally comprising structural means on said housing for receiving suspension means for mounting said fixture in suspended relationship from the ceiling of a room,

5. The fixture of claim 4 additionally comprising suspension means attached to said structural means on said housing.

6. The fixture of claim 1 additionally comprising structural means on said housing for mounting said fixture by means of a base mounting system.

7. The fixture of claim 1 additionally comprising closure means for said access opening,

8. The fixture of claim 7 wherein said closure means comprises a hinged door.

9. The fixture of claim 1 additionally comprising an air filter support channel mounted in the interior of said housing on said peripheral walls.

10. The fixture of claim 1 wherein said lower hood peripheral walls include light transmitting panels.

11. The fixture of claim 1 additionally comprising a bridge member spaced downwardly from said air filter and extending horizontally across the air path below said filter and light-emitting means mounted on said bridge member.

12. An air filtering light fixture for support in spaced relationship from the ceiling of a room and in an elevated condition above an area where persons may congregate, comprising:

a housing having peripheral walls defining a generally vertical air path for an upwardly moving air stream, said vertical air path being centrally located in said housing, said housing having a horizontal bottom opening defining an air intake mouth and having a lower hood portion comprised of lower hood peripheral walls slanted downwardly and outwardly to said horizontal bottom opening, said housing also having a horizontal top opening defining an air exhaust for directing air upwardly from said housing, said top opening being centrally located vertically above said bottom opening,

means on said housing for supporting said housing in a spaced relationship from the ceiling of a room and in an elevated condition above where persons may congregate,

a horizontally oriented air filter removably mounted in the interior of said housing at a location above said lower hood portion, said air filter being mounted in a manner such that said filter may be removed in a horizontal direction from said housing through a said peripheral wall at a location above said lower hood portion, said air filter being oriented to extend transversely of said air path for filtering contaminants out of the air stream,

a bridge member mounted on said housing at a location spaced downwardly away from said air filter and extending horizontally across said air path between the outwardly slanted lower hood peripheral walls so as to avoid restriction of the air path entrance into said air filter,

light emitting means mounted on said bridge member of said housing for projecting light downwardly therefrom, and

air propulsion means mounted in said housing above said air filter, said air propulsion means being for pulling air from below said housing upwardly through said air intake mouth and through said air filter and propelling the air as an air stream out of said top opening toward the ceiling so as to thereby form a toroidal air movement about said peripheral walls of said housing, with air within said housing moving upwardly and air laterally external to said housing induced to move downwardly and enter said air intake mouth by virtue of the displacement of air caused by the exhaust air stream above said housing.

13. The fixture of claim 12 wherein said support means comprises a base mounting system.

14. The fixture of claim 13 wherein said base mounting system comprises a wall plate for mounting on a wall of a room.

15. The fixture of claim 13 wherein said base mounting system comprises a floor plate for resting on the floor of a room.

16. The fixture of claim 12 wherein said light emitting means comprises at least two light emitting devices mounted on said bridge member.

17. The fixture of claim 12 wherein said air propulsion means comprises an axial flow fan.

18. The fixture of claim 12 wherein said air propulsion means comprises a motor, at least two laterally spaced axial flow fan assemblies, and means for transmitting power from said motor to said axial flow fan assemblies, said motor being disposed in horizontally spaced relation to said axial flow fan assemblies and said air propulsion means being in a substantially balanced arrangement in said fixture to minimize the effect of any vibration tendencies on said fixture.

19. A method of filtering and recirculating air in a room, comprising:

(a) forming an air filtering fixture comprising;

(i) a housing having peripheral walls defining a generally vertical air path for an upwardly moving air stream, said vertical air path being centrally located in said housing, said housing having a horizontal bottom opening defining an air intake mouth and a horizontal top opening defining an air exhaust for directing air upwardly from said housing, said top opening being centrally located vertically above said bottom opening, said peripheral walls of said housing having an upper portion within which an air propulsion means is adapted to be received and having a horizontally oriented access opening therethrough at a location above said horizontal bottom opening and below said upper portion,

(ii) a horizontally oriented air filter removably mounted in the interior of said housing at the location of said horizontally oriented access opening and extending transversely of said vertical air path, said air filter being slidably removable and replaceable in a horizontal direction through said horizontally oriented access opening, and

(iii) an axial flow air propulsion means mounted in said housing above said horizontally oriented air filter and within said upper portion of said peripheral walls,

(b) providing sloped peripheral walls for said fixture with the slope thereof being such as to extend outwardly and downwardly below said horizontally oriented filter,

(c) suspending said air filtering fixture in spaced relationship from the ceiling of a room and in an elevated condition above an area where persons may congregate, and

(d) activating said air propulsion means to pull air from below said housing upwardly through said air intake mouth and through said air filter and to propel said air as an air stream out of said top opening toward the ceiling so as to thereby cause the formation of a toroidal air movement about said peripheral walls of said housing, with air within said housing moving upwardly and air laterally external to said housing induced to move downwardly and enter said air intake mouth by virtue of the displacement of air caused by the exhaust air stream above said housing.