초록 ▼

An air filtration system includable in and for HVAC equipment includes one or more intense field dielectric filter units and a field charging unit retained in a support structure or cabinet by a removable door which includes control circuitry and contactors engageable with corresponding contact memb

An air filtration system includable in and for HVAC equipment includes one or more intense field dielectric filter units and a field charging unit retained in a support structure or cabinet by a removable door which includes control circuitry and contactors engageable with corresponding contact members on a filter unit and the field charging unit for supplying high voltage DC potential to the respective units. Each filter unit includes a filter core comprising a stacked array of filter elements formed of dielectric sheets interconnected by elongated spaced apart ribs forming flow passages. The field charging unit and the filter units are removable from the support or cabinet for cleaning or replacement by opening or removing the door. An interlock switch and a field shorting mechanism are actuated during servicing or replacement of the system components.

대표청구항 ▼

What is claimed is: 1. An air filtration system for an air conditioning system, said air filtration system comprising: a support structure; at least one filter unit mounted on said support structure for removal therefrom, said filter unit including an array of passages through which an air flowstre

What is claimed is: 1. An air filtration system for an air conditioning system, said air filtration system comprising: a support structure; at least one filter unit mounted on said support structure for removal therefrom, said filter unit including an array of passages through which an air flowstream may pass relatively free and through a high voltage electric field for collecting particles on said filter unit from said air flowstream; a high voltage electric field charging unit mounted on said support structure upstream from said filter unit with respect to the direction of air flow through said filtration system; said one filter unit and said field charging unit including electrical contact members operable to be in contact with a source of high voltage electric potential; and a door supported at said support structure for movement to a position to permit removal of said one filter unit from said support structure. 2. The filtration system set forth in claim 1 wherein: said door includes spaced apart electrical contactors engageable with said contact members on at least one of said one filter unit and said field charging unit. 3. The filtration system set forth in claim 2 wherein: said door includes one high potential contactor and at least two low potential contactors, spaced apart on said door. 4. The filtration system set forth in claim 3 wherein: said door is adapted to be disposed on said support structure in two different positions with respect to said support structure. 5. The filtration system set forth in claim 2 wherein: said door includes a control circuit disposed thereon and a connector for connecting said filtration system to a source of electric power, said control circuit including means for providing high voltage direct current power to said contactors on said door. 6. The filtration system set forth in claim 5 wherein: said control circuit includes an interlock switch engageable with means on said support structure, said interlock switch being operable to interrupt said source of electric power to said filtration system when said door is moved with respect to said support structure. 7. The filtration system set forth in claim 2 wherein: said door includes at least one latch member movable between a first position for latching said door to said support structure and a second position to permit movement of said door with respect to said support structure, said latch member being operably connected to means for discharging an electric potential on at least one of said one filter unit and said field charging unit in response to movement of said one latch member. 8. The filtration system set forth in claim 7 wherein: said means comprises a link connected to said one latch member and to a member engageable with one of said contactors on said door, said link being connected to a grounding member connected to another of said contactors on said door. 9. The filtration system set forth in claim 1 including: an air prefilter unit mounted on said support structure in a position upstream of said field charging unit with respect to the direction of air flow through said filtration system, said prefilter unit being removable from said support structure for cleaning or replacement thereof. 10. The filtration system set forth in claim 1 including: a second filter unit supported on said support structure and including electrical contact members disposed thereon, said filter units each including plural electrical contact members disposed thereon and engageable with corresponding contact members on the other of said filter units to provide high voltage electrical potential to both of said filter units. 11. The filtration system set forth in claim 10 wherein: at least two of said contact members on said filter units are disposed such as to engage contactors on said door for providing high voltage electric potential to said filter units. 12. The filtration system set forth in claim 1 wherein: said support structure comprises a cabinet including spaced apart guide members for receiving said one filter unit in said cabinet whereby said one filter unit may be removably mounted on said cabinet, and guide members on said cabinet for receiving and supporting said field charging unit whereby said cabinet may receive said field charging thereon and for removal therefrom; and said cabinet includes means for supporting said door thereon. 13. The filtration system set forth in claim 12 wherein: said cabinet is one of mounted on and interposed in a duct in communication with a unit of HVAC equipment for filtering air flowing to said unit of HVAC equipment. 14. The filtration system set forth in claim 1 wherein: said support structure is part of a cabinet for a unit of HVAC equipment. 15. The filtration system set forth in claim 1 wherein: said one filter unit includes a perimeter frame, a filter core assembly mountable on said frame, said filter core assembly including a stack of contiguous filter elements, said filter elements being stacked in an array where alternate ones of said filter elements is in electrical conductive contact with a positive high voltage potential and a negative high voltage potential, respectively, and conductor means on said core assembly in electrically conductive contact with said contact members on said filter unit. 16. The filtration system set forth in claim 15 wherein: each of said filter elements including spaced apart sheet walls and generally parallel partitions spaced apart between said sheet walls and forming air flow passages, surface conductor means on at least one of said sheet walls, alternate ones of said filter elements being electrically connected to each other via conductor means electrically connected to said surface conductor means, respectively. 17. The filtration system set forth in claim 16 wherein: said conductor means includes an elongated conductor strip disposed in a slot in each of said alternate ones of said filter elements and in electrical conductive contact with said surface conductor means, respectively. 18. The filtration system set forth in claim 15 including: resistor means disposed in said conductor means between said filter elements and said contact members on said filter unit. 19. The filtration system set forth in claim 15 wherein: said filter core assembly is secured to said frame by an adhesive and a perimeter sealant to permit washing said filter unit without contamination of said conductor means. 20. The filtration system set forth in claim 15 wherein: said frame includes means cooperating with said support structure for requiring mounting said frame on said support structure in a predetermined position. 21. The filtration system set forth in claim 20 wherein: said means on said frame cooperating with said support structure comprises a channel and said means on said support structure comprises a boss adapted to be disposed in said channel whereby said filter unit may be slidably engaged with and removed from said support structure. 22. The filtration system set forth in claim 1 wherein: said field charging unit comprises a perimeter frame supporting a field charging plate having plural openings formed therein; plural conductor pins mounted on said frame and disposed in alignment with said openings in said charging plate, respectively; conductor means on said frame and operably connected to one of said contact members on said field charging unit for providing an electrical potential at each of said pins; and conductor means on said frame in electrically conductive contact with the other of said contact members of said field charging unit and said plate. 23. The filtration system set forth in claim 22 wherein: said conductor means on said frame includes plural spaced apart elongated conductor strips connected to selected ones of said pins, respectively, and a busbar operably connected to said conductor strips and to one of said contact members on said field charging unit. 24. In an air conditioning unit, a cabinet including an air inlet and an air outlet and an air filtration system disposed in said cabinet for filtering air flowing therethrough, said filtration system including: at least one filter unit mounted in said cabinet for removal therefrom, said filter unit including an array of passages through which an air flowstream may pass relatively free and through a high voltage electric field for collecting particles on said filter unit from said air flowstream; a high voltage electric field charging unit mounted in said cabinet upstream from said filter unit with respect to the direction of air flow through said filtration system; said filter unit and said field charging unit including electrical contact members operable to be in contact with a source of high voltage electric potential; and a door movable to a position to permit removal of said one filter unit from said cabinet. 25. The filtration system set forth in claim 24 wherein: said door includes spaced apart electrical contactors engageable with said contact members on at least one of said filter unit and said field charging unit. 26. The filtration system set forth in claim 25 wherein: said door includes at least one latch member movable between a first position for latching said door in a closed position and a second position to permit movement of said door with respect to said cabinet, said one latch member being operably connected to means for creating a conductive path to discharge an electric potential on at least one of said filter unit and said field charging unit in response to movement of said one latch member. 27. The filtration system set forth in claim 26 wherein: said means comprises a link connected to said one latch member and to a member engageable with one of said contactors on said door, said link being connected to a grounding member connected to another of said contactors on said door. 28. The filtration system set forth in claim 24 including: a display disposed on said door for indicating an operating condition of said filtration system and an operating switch on said door for causing a controller for said filtration system to provide electric power to said filter unit and said field charging unit by way of said controller. 29. The filtration system set forth in claim 24 including: a second filter unit including electrical contact members disposed thereon, said filter units each including plural electrical contact members disposed thereon and engageable with corresponding contact members on the other of said filter units to provide high voltage electrical potential to both of said filter units. 30. The filtration system set forth in claim 29 wherein: at least two of said contact members on said filter units are disposed such as to engage corresponding contactors on said door for providing high voltage electric potential to said filter units. 31. The filtration system set forth in claim 24 wherein: said filter unit includes a perimeter frame, a filter core assembly mountable on said frame, said filter core assembly including a stack of contiguous filter elements, said filter elements being stacked in an array whereby alternate ones of said filter elements are in electrical conductive contact with a positive high voltage potential and a negative potential, respectively, and conductor means on said core assembly in electrically conductive contact with said contact members on said filter unit. 32. The filtration system set forth in claim 31 wherein: each of said filter elements including spaced apart sheet walls and generally parallel partitions spaced apart between said sheet walls and forming air flow passages, surface conductor means on at least one of said sheet walls, alternate ones of said filter elements being electrically connected to each other via conductor means electrically connected to said surface conductor means, respectively. 33. The filtration system set forth in claim 32 wherein: said conductor means includes an elongated conductor strip disposed in a slot in each of said alternate ones of said filter elements and in electrical conductive contact with said surface conductor means, respectively. 34. The filtration system set forth in claim 31 including: resistor means disposed in said conductor means between said filter elements and said contact members on said filter unit. 35. The filtration system set forth in claim 24 wherein: said field charging unit comprises a perimeter frame supporting a field charging plate having plural openings formed therein; plural conductor pins mounted on said frame and disposed in alignment with said openings in said charging plate, respectively; conductor means on said frame and operably connected to one of said contact members on said field charging unit for providing an electrical potential at each of said pins; and conductor means on said frame in electrically conductive contact with the other of said contact members of said field charging unit and said plate. 36. The filtration system set forth in claim 35 wherein: said conductor means on said frame includes plural spaced apart elongated conductor strips connected to selected ones of said pins, respectively, and a busbar operably connected to said conductor strips and to one of said contact members on said field charging unit.