Structures for electrostatic V-bank air filters

• US 6,294,004 B1
• Filed: 12/21/1999
• Issued: 09/25/2001
• Est. Priority Date: 12/21/1999
• Status: Expired due to Fees

• Current Assignee: Engineering Dynamics Ltd.
• Original Assignee: Engineering Dynamics Ltd.
• Inventors: Wiser, Forwood Cloud III, Summers, George Robert
• Primary Examiner(s): Chiesa, Richard L.
• Application Number:
  US09/473,042
• Time in Patent Office: 644 Days
• Field of Search: 96/66, 96/67, 96/83, 96/94, 96/97, 96/98, 961/00, 96/84, 554/93, 555/01, 555/06, 554/84, 555/21, 55D/IG.12, 55D/IG.31
• US Class Current: 96/66
• CPC Class Codes: B01D 46/0032 using electrostatic forces to remove particles, e.g. electret filters
• CPC Class Codes: B01D 46/121 V-type arrangements
• CPC Class Codes: B03C 3/025 Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators or dry-wet separator combinations
• CPC Class Codes: B03C 3/155 Filtration
• CPC Class Codes: B03C 3/82 Housings
• CPC Class Codes: Y10S 55/12 Pocket type filter
• CPC Class Codes: Y10S 55/31 Filter frame

Abstract

Structures for V-bank electrostatic air filters are described. The V-bank air filters are assembled from two side panels, perforated top and bottom plates, a narrow end wall and an open wide end for the intake of air to be filtered. A pair of enclosure plates are pivotally mounted to the side panels in a parallel relationship to the respective top and bottom plates to form a pair of rectangular enclosures for respectively supporting electrostatic filter pads. The enclosure plates pivot open for removal and replacement of the filter pads. The side panels, top and bottom plates and rear wall are made from sheet metal blanks using cutting, bending and stamping processes. The enclosure plates are made from sheet metal blanks or welded wire structures. The advantage is that the structures are manufactured using simple automated processes and are quickly assembled without sub-assembly, thus time and labour are saved and costs are reduced.

Claims

1. A structure for an electrostatic V-bank air filter, comprising:

a pair of substantially triangular side panels;

a perforated electrically conductive top plate and a perforated electrically conductive bottom plate;

either one of side panels and the top and bottom plates having respective angled side edges adapted to mount the top and bottom plates transversely to the side panels to form a substantially V-shaped housing;

a pair of electrically conductive enclosure plates for respectively forming a rectangular enclosure in combination with a one of the top plate and the bottom plate, the enclosure plates respectively supporting an electrostatic filter pad when the enclosure plates are in a closed position, each enclosure plate being movable to an open position in which the electrostatic filter pad can be removed for replacement;

locking mechanisms respectively adapted to detachably secure the pair of enclosure plates in the closed position; and

electrodes adapted to deliver an electric charge to the respective electrostatic filter pads when the enclosure plates are in the closed position.

2. A structure as claimed in claim 1 wherein the side panels respectively includes an inner side, an outer side and the angled side edges are disposed at a right angle with respect to either one of the inner and outer sides.

3. A structure as claimed in claim 1 wherein the substantially triangular side panels are truncated and a rear wall is mounted to the top and bottom plates at the truncated ends of the side panels to form a closed narrow end of the structure.

4. A structure as claimed in claim 1 wherein each of the enclosure plates includes a top face, a bottom face, two side edges bent at a right angle with respect to either one of the top face and the bottom face, and bores that pierce each of the side edges in an aligned relationship for accepting a hinge pin inserted through corresponding bores in the side panels so that the enclosure plates are pivotally mounted to the side panels in parallel relationship with the top and bottom plates to permit pivotal movement from the closed position to the open position.

5. A structure as claimed in claim 4 wherein the corresponding bores are located near a wide end of the respective side panels.

6. A structure as claimed in claim 4 wherein the corresponding bores are located near a narrow end of the respective side panels.

7. A structure as claimed in claim 1 wherein each of the enclosure plates comprises a welded wire structure having a wire front edge, a wire rear edge and a plurality of spaced-apart parallel wires respectively welded to the wire front and rear edges.

8. A structure as claimed in claim 7 wherein the wire rear edge extends beyond opposite sides of the welded wire structure to form a hinge pin received in bores in the respective side panels to pivotally mount the enclosure plates to the side panels.

9. A structure as claimed in claim 8 wherein the bores which receive the hinge pin are located near a wide end of the respective triangular side panels.

10. A structure as claimed in claim 8 wherein the bores which receive the hinge pin are located near a narrow end of the respective triangular side panels.

11. A structure as claimed in claim 1 wherein the enclosure plate adapted to form the rectangular enclosure with the top panel includes a top face, a bottom face, two side edges disposed at a right angle with respect to the bottom face for connection with a hinge pin that is supported by the respective side panels, a rear end edge disposed at a right angle with respect to the bottom face, and a front edge disposed at a right angle with respect to the top face to close a front end of the rectangular enclosure when the enclosure plate is in the closed position;

and wherein the enclosure plate adapted to form the rectangular enclosure with the bottom panel include s a top face, a bottom face, two side edges disposed at a right angle with respect to the top face for mounting a hinge pin thereto that is supported by the respective side panels, a rear end edge disposed at a right angle with respect to the top face, and a front edge disposed at a right angle with respect to the bottom face to close a front end of the rectangular enclosure when the enclosure plate is in the closed position against the bottom panel.

12. A structure as claimed in claim 1 further comprising a mounting flange surrounding the open end, the mounting flange being formed by an outwardly disposed front edge of the top and bottom plates and an outwardly disposed front edge of each of the side panels.

13. A structure as claimed in claim 11 wherein each of the side panels, top and bottom plates, and enclosure plates is made of a sheet metal blank, the respective edges disposed at right angles being bent using a metal bending process.

14. A structure as claimed in claim 1 wherein the electrodes are respectively mounted to but insulated from the top plate and the bottom plate at an end with respect to which the respective enclosure plates are opened to replace the electrostatic filter pad.

15. A structure as claimed in claim 14 wherein the electrodes are respectively mounted to inner surfaces of the top and bottom plates when the respective enclosure plates are pivotally mounted to a narrow end of the triangular side panels.

16. A structure as claimed in claim 14 wherein the electrodes are respectively mounted to outer surfaces of the top and bottom plates when the respective enclosure plates are pivotally mounted to a wide end of the triangular side panels.

17. A structure as claimed in claim 1 wherein the locking mechanisms include at least two toggles respectively pivotally mounted to the top and bottom plates, the toggles being adapted to engage the enclosure plates in a locked position and disengage the enclosure plates in an unlocked position.

18. A structure as claimed in claim 1 wherein the locking mechanisms comprise at least two spring clips respectively mounted to the top and bottom plates, the spring clips being adapted to engage the enclosure plates in a locked position and disengage the enclosure plates in an unlocked position.

19. A structure for an electrostatic V-bank air filter, comprising:

a substantially V-shaped housing having an open, wide front end, a narrow, closed rear end, a perforated top plate, a perforated bottom plate, a rear wall and a pair of side panels, each side panel being a truncated triangular shape and constructed from a sheet metal blank with side edges and a rear edge bent at a right angle with respect to one side thereof while a front edge is bent in an opposite direction, each of the top and bottom plates being rectangular and constructed from a sheet metal blank with a front edge bent outwardly and a rear edge bent inwardly, the top and bottom plates being respectively mounted transversely to the side edges of the side panels, and a rear wall that is constructed from a sheet metal blank and mounted to rear edges of the side panels and top and bottom plates to form the housing, the respective front edges of the side panels and the top and bottom plates forming a mounting flange surrounding the open end of the housing;

a pair of enclosure plates mounted in a parallel relation to the respective top and bottom plates and adapted to form a pair of rectangular enclosures for respectively supporting an electrostatic filter pad, each enclosure plate being rectangular and pivotally mounted at a rear end of the side edges to the side panels adjacent the rear wall so that the enclosure plate is independently pivotable from a closed position in which the rectangular enclosure is formed to a open position in which the electrostatic filter pad can be removed for replacement;

locking mechanisms located at the open end of the housing and the front edges of the enclosure plates to detachably secure the pair of enclosure plates in the closed position; and

electrodes mounted to the housing at the open end and adapted to deliver an electric charge to the respective electrostatic filter pads when the enclosure plates are in the closed position.

20. A structure as claimed in claim 19 wherein the pair of enclosure plates are constructed from a sheet metal blank with side edges and a rear edge bent at a right angle with respect to either surface thereof and a front edge bent at a right angle with respect to an opposite surface thereof.

21. A structure as claimed in claim 20 wherein the enclosure plates are pivotally mounted to the side panels by a hinge pin that is inserted through bores in the respective side panels and through aligned bores in a rear end of the side edges of the enclosure plates.

22. A structure as claimed in claim 19 wherein the enclosure plates are rectangular welded wire structures having a wire front edge, a wire rear edge with spaced-apart parallel wires respectively welded to the wire front edge and the wire rear edge.

23. A structure as claimed in claim 22 wherein the enclosure plates are pivotally mounted to the side panels by the wire rear edge which extends beyond each side edge of the welded wire structure and is received in bores in the respective side panels.

24. A structure for an electrostatic V-bank air filter, comprising:

a substantially V-shaped housing having an open, wide rear end, a narrow, closed front end, a perforated top plate, a perforated bottom plate, a front wall and a pair of side panels, each side panel being a truncated triangular shape and constructed from a sheet metal blank with a rear edge bent outwardly, each of the top and bottom plates being rectangular and constructed from a sheet metal blank with a rear edge bent outwardly and side edges bent at a right angle with respect to one side thereof, the top and bottom plates being respectively mounted transversely between the side edges to the side panels, and the front wall is constructed from a sheet metal blank with bent edges that are mounted to the top and bottom plates to form the housing, the respective rear edges of the side panels and the top and bottom plates forming a mounting flange surrounding the open end of the housing;

a pair of enclosure plates mounted to an outside of the housing in a parallel relation to the respective top and bottom plates and adapted to form a pair of rectangular enclosures for respectively supporting an electrostatic filter pad, each enclosure plate being rectangular and pivotally mounted at a rear end of the side edges to the side panels adjacent the mounting flange so that the enclosure plate is pivotable from a closed position in which the rectangular enclosure is formed to an open position in which the electrostatic filter pad can be removed for replacement;

locking mechanisms located at the front end of the housing and the front edges of the enclosure plates to detachably secure the pair of enclosure plates in the closed position; and

electrodes mounted to the front end of the housing and adapted to deliver an electric charge to the respective electrostatic filter pads when the enclosure plates are in the closed position.

25. A structure as claimed in claim 24 wherein each of the enclosure plates comprises a welded wire structure having a wire front edge, a wire rear edge and a plurality of spaced-apart parallel wires respectively welded to the wire front and rear edges.

26. A structure as claimed in claim 25 wherein the wire rear edge extends beyond opposite sides of the welded wire structure to form a hinge pin received in bores that pierce the side edges of the respective side panels.

27. A structure as claimed in claim 24 wherein each of the enclosure plates comprises a perforated sheet metal blank having a top face, a bottom face and two side edges disposed at a right angle with respect to one face for connection with a hinge pin that is supported by the respective side panels.