High efficiency particulate air filter cabinet
First Claim
1. A structure for sealably connecting a filter in a first cabinet to an air moving means in a second cabinet, said first and second cabinets having inturned flanges defining oppositely disposed inlet and outlet openings, said inturned flanges defining said outlet opening in said first cabinet and said inturned flanges defining said inlet opening in said second cabinet having registering surfaces positioned on a common plane, means fastening said flanges to one another with said surfaces of said flanges in sealing relation, said first cabinet being of a known height and width and has impervious top, bottom and oppositely disposed side walls extending between said oppositely disposed inlet and outlet openings and wherein a third cabinet of a size greater than said first cabinet has oppositely disposed inlet and outlet openings and top, bottom and oppositely disposed side walls extending therebetween, said top, bottom and oppositely disposed side walls being spaced with respect to said top, bottom and oppositely disposed side walls of said first cabinet so as to form an air space therearound, said inlet opening in said third cabinet being in spaced relation to said inlet opening in said first cabinet whereby air entering said third cabinet is directed to said inlet opening of said first cabinet so as to move exclusively through said filter unit therein toward said air moving means.
1 Assignment
0 Petitions
Accused Products
Abstract
A multi-part cabinet enclosing a high efficiency particulate air filter and a blower for moving air therethrough positions the filter in a first part of the cabinet and sealingly connects it with a second part of the cabinet in which the blower and its motor are located. A third part of the cabinet encloses the first part and provides a screened access opening so that air to be filtered can enter the third part of the multi-part cabinet and flow therefrom through the high efficiency particulate air filter in the first part of the cabinet and from the filter into the second part of the cabinet and the blower therein, the second part of the cabinet being provided with a screened air exit, the first part of the multi-part cabinet being permanently sealingly attached to the second part of the multi-part cabinet. The interconnection of the first, second and third parts of the multi-part cabinet positively prevent air leaks which adversely affect the efficiency of the high efficiency particulate air filter.
52 Citations
8 Claims
- 1. A structure for sealably connecting a filter in a first cabinet to an air moving means in a second cabinet, said first and second cabinets having inturned flanges defining oppositely disposed inlet and outlet openings, said inturned flanges defining said outlet opening in said first cabinet and said inturned flanges defining said inlet opening in said second cabinet having registering surfaces positioned on a common plane, means fastening said flanges to one another with said surfaces of said flanges in sealing relation, said first cabinet being of a known height and width and has impervious top, bottom and oppositely disposed side walls extending between said oppositely disposed inlet and outlet openings and wherein a third cabinet of a size greater than said first cabinet has oppositely disposed inlet and outlet openings and top, bottom and oppositely disposed side walls extending therebetween, said top, bottom and oppositely disposed side walls being spaced with respect to said top, bottom and oppositely disposed side walls of said first cabinet so as to form an air space therearound, said inlet opening in said third cabinet being in spaced relation to said inlet opening in said first cabinet whereby air entering said third cabinet is directed to said inlet opening of said first cabinet so as to move exclusively through said filter unit therein toward said air moving means.
- 5. An improvement in a negative air pressure device having a blower for moving air through a high efficiency particulate air filter so as to filter and exhaust air from a work area, the improved apparatus comprising an assembled multi-part cabinet, a high efficiency particulate air filter in a first one of said multi-part cabinets, a blower and means for energizing it in a second one of said multi-part cabinets and a third one of said multi-part cabinets forming a housing around said first one of said multi-part cabinets having said filter therein, said third one of said multi-part cabinets being positioned over and around said first one of said multi-part cabinets having said filter therein so as to form an air space between said first one of said cabinets and said third one of said cabinets, an air inlet in said third one of said multi-part cabinets, an air outlet in said second one of said multi-part cabinets and communicating openings in said first one of said cabinets and said second one of said cabinets, said first one, second one, and third one of said cabinets secured to one another on a common plane, said communicating openings in said first and second cabinets lying on said common plane.
Specification