HVAC support and mounting system
A system for mounting and supporting an HVAC system on a curb in which a collar is provided and fitted on the curb, and the collar provides risers which connect to the supply and return lines of the system. The HVAC unit is fitted on the collar and engages the supply and return risers in air tight relation. The system further accumulates moisture and water on, or in proximity to, the system and directs it to a remote location.
The present invention relates, in a general sense, to heating, ventilation and air conditioning systems and, more particularly, to the installation and support of HVAC systems installed and mounted on roofs and pads at less than roof height.
BACKGROUND OF THE INVENTION1. Field of the Invention
Heating, ventilation and air conditioning equipment, affectionately lumped together under the acronym HVAC, has become standard in new construction and remodeling, to add or upgrade HVAC equipment, and has become big business.
Energy costs appear to be a prime mover in the determination of whether and, if so, what type and brand of unit is best suited to one's home or business. There are a large number of options available, most of which trumpet their efficiency and power, concepts which are typically, but not mutually, exclusive.
Hand in hand with the laudable goal of saving energy is reduction of leakage, which reduces the amount of treated air which, by virtue of gaps in the installation, leaks into untreated spaces.
In most residential and some commercial installations, the operating equipment sits on a curb. The curb is a sheet metal construction and is typically supported on a slab on a ground installation and on a roof installation, and, in particular, where the roof is pitched, the curb is specially constructed to fit the pitch so as to support the operating equipment in a vertical plane.
Experience has demonstrated that the position of the equipment, not much more efficient as it is seated on the curbing, is a large source of leakage, with a consequent loss of efficiency and compromising the savings attributable to more efficient heating and cooling equipment. The present invention addresses this problem and offers a solution.
2. Overview of the Prior Art
Over the last several years, as there has been an enhanced interest in conservation of energy, there has been a commensurate interest in minimizing, if not eliminating, leaks in HVAC systems.
By way of example, Gillispie, in his U.S. Pat. No. 5,687,514, suggests that the leveling of a curb is a difficult problem, and that one way to address the problem is to place an upper portion within a lower portion with the upper portion being slightly smaller than the lower so that the orientation of the upper portion can be adjusted to level the equipment mounted to it. It is a clever solution to the leveling problem, but no solution to the leakage problem.
A similar concept governs the structure disclosed in Rutledge U.S. Pat. No. 6,343,439, wherein a slidable pin holds the support curb relative to the base curb.
A couple of other patents are noted in passing, although they relate to the manner of joining various panels of a curb and in no way relate to the present invention. Thus, we visit Rummo, Jr. et al. U.S. Pat. No. 5,465,533, and Brown et al. U.S. Pat. No. 6,041,557, both of which are systems for connecting the various panels that form a curb. Brown, in particular, reflects the current thinking with respect to curbing. Note the cross members 28, 30 and 32 which are intended to divide the curbing into distinct passages for supply and return air and also result in potentially heavy leakage.
SUMMARY OF THE INVENTIONThe present invention has as its focus the provision of a novel mounting and support system for a variety of HVAC units which are typically mounted out of doors, on pads and roofs, including pitched roofs.
One of the objectives to be accomplished by the present invention is the substantial elimination of leakage of conditioned air at the point of proper mounting of the HVAC unit to the duct system. It is an objective related to the foregoing to eliminate the migration of conditioned air between the supply and return air sides.
It is another objective of the present invention to provide a collar which provides a uniform, and substantially air tight, transition between a typical curbing and the HVAC unit itself.
A further objective is to provide drainage which guides both condensate and rain away from the entire assembly and off any roof installation in an effort to minimize the growth of algae and mold organisms in and around the unit itself, as well as around shingles, tiles and the like.
Yet another, and further, objective of the present invention is to provide a collar for the mounting of an HVAC unit on a curb which is aesthetically pleasing and installation having all of the benefits attributed to it.
The foregoing, as well as other objectives and benefits, will become evident to those skilled in the art when the following Detailed Description of a Preferred embodiment is read in conjunction with the drawings, wherein:
With reference now to the drawings, and initially to
The installation includes a conventional curb 22 secured to the roof of a structure, in any suitable fashion, an HVAC unit 24, and a novel collar unit 26, constructed in accordance with the present invention and adapted to receive the HVAC unit. The HVAC, which may be any one of available units, receives air to be conditioned from a return line and conditioned air through a supply line.
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Still referring to
In accomplishing the objectives of the invention, the collar 26 becomes an efficient mechanical coupling between the curb 22 and the HVAC unit 24. In order to accommodate a variety of different HVAC units available on the market, the collar of the present invention, which may be formed from sheet metal or any other suitable material, including certain plastics, is shown as having a stepped, or tiered, structure allowing the bottom and top openings to be different sizes which permits any HVAC unit to be accommodated on the curb.. Referring to
Returning to the collar 26, an important feature of the curb is its drainage system, which has the ability to collect and disperse both moisture which accumulates during operation of the HVAC units evaporator, as well as from outside environmental sources. In order to disperse and dispose of accumulated moisture, the bottom of the collar is formed with a drain pan 52. The drain pan 52 has sloping walls leading to a low point, and the HVAC unit's drain line is directed into the drain pan.
Referring to
The novel collar construction has the further advantage of being able to capture and remove environmentally derived moisture, in the form of rain or fog, which may develop from time to time. This is accomplished by making the outer upstanding perimeter wall 58 of the upper section 49 slightly larger, perhaps by 1″, than the perimeter of the HVAC unit. In this manner, rain falling on or about the unit enters the collar through the space between the unit and the curb wall, where it moves to the drain hole 54, and it is carried away from the installation 20. Arrows on
It is another important feature-of the invention that leakage of conditioned air, whether heated or cooled, is kept to an absolute minimum. To this end, risers 61 and 63 are affixed over companion openings in the drain pan immediately above the supply and return ducts from the structure to be air conditioned. Duct extensions, sometimes referred to as cans, are constructed to be snugly fitted into the risers and extend below the collar where they may be connected to the ducting from the structure to be air conditioned.
Leakage is a persistent problem in conventional installations at the HVAC as it is mounted on the curb 22, or with the present invention, on the collar. An objective of the present invention is to obviate that leakage, and, to that end, gaskets 65 and 67 are provided about the perimeter of the risers 61 and 63 where they are aligned in mating engagement with the appropriate outlet, which is a horizontal plate 68 in the HVAC unit. The edge of the plate and the flange are seated against one another when the HVAC unit is lowered into place.
Referring to
It will be understood that the gasket is designed to accommodate the flange upon which it is to reside, and that it was not intended to indicate that one or the other of the risers had a specific form of the flange.
Once the appropriate gasket is in place, the HVAC unit is lowered into place on the collar, compressing the gasket and effecting an air tight seal.
Having now described a preferred embodiment of the present invention, it will be appreciated that some variations in structure and operation may occur to those skilled in the art, and such variations are within the contemplation of the invention and the scope of the claims, wherein:
Claims
1. An HVAC mounting and support system for installation of an HVAC unit on a curb, wherein said system includes a supply line for providing air to be conditioned to said system, and a return line for directing conditioned air to an area to be conditioned; the system comprising, in addition to the curb;
- a collar, said collar being mounted on said curb, said collar having upstanding risers thereon, said risers being aligned and engaged with the supply and return lines in said curb;
- said collar adapted to receive and support said HVAC unit.
2. The HVAC mounting and support system of claim 1 having a drainage system in said collar, said drainage system adapted to receive condensation from the HVAC unit and direct such condensation to a location remote from said system.
3. The HVAC mounting and support system of claim 1, wherein said drainage system is configured to capture environmentally generated moisture and guide such moisture away from said HVAC unit.
4. The HVAC mounting and support system of claim 1, wherein said HVAC unit being provided with a bottom plate, openings in said bottom plate being provided for supply and return air;
- said openings in said HVAC unit and said risers in said collar being aligned and sealed with one another when said HVAC unit is in place.
5. The HVAC mounting and support system of claim 1, said collar having a lower section, an intermediate section and an upper section;
- said lower section being sized so as to encompass said curb; and said upper section being sized to receive said HVAC unit.
6. The HVAC mounting and support system of claim 5, wherein a space is provided between the perimeter of said HVAC system and the perimeter of said collar, said space adapted to receive environmentally created moisture.
7. The HVAC mounting and support system of claim 3, wherein said drainage system includes a drainage pan, said drainage pan having an opening at the base thereof, a tube connected to said drainage pan about said hole wherein condensation accumulated in said drainage pan is directed away from said mounting and support system.
8. The HVAC mounting and support system of claim 4, wherein a gasket is provided to seal said risers in said collar with said HVAC unit.
9. The HVAC mounting and support system of claim 8, wherein said risers terminate in flanges, said flanges facing inward and parallel to said bottom plate, and said gasket circumscribes the edges of said risers and said bottom plate.
10. The HVAC mounting and support system of claim 2, wherein said drainage system is configured to capture environmentally generated moisture and guide such moisture away from said HVAC unit.
Type: Application
Filed: Jul 31, 2006
Publication Date: Jan 31, 2008
Inventor: Terry D. Fox (Visalia, CA)
Application Number: 11/496,078
International Classification: E04B 1/70 (20060101);