Refrigeration – Gas controller or director – Cooled gas directed relative to cooled enclosure
Reexamination Certificate
2001-01-26
2002-11-05
Doerrler, William C. (Department: 3744)
Refrigeration
Gas controller or director
Cooled gas directed relative to cooled enclosure
C062S426000, C062S285000
Reexamination Certificate
active
06474092
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method and apparatus for installing a cover for a blower of a heat exchange unit
2. Discussion of the Related Art
Prior art covers for the blowers of heat exchange units are generally made of metal stampings that are welded and/or screwed together. Such prior manufacturing methods require expert sheet metal craftsmanship, as well as welding skills. Since such expertise is required, prior art covers or blowers are generally manufactured at a central site. The prior art blower covers are generally manufactured as two or more separate parts that are assembled together after the separate parts of the cover surround a fan/motor unit. Since the prior art blowers are generally manufactured in a separate manufacturing site, rather than at the work site, the bulky blower assembly has to be shipped from the manufacturing site during which the blower cover may be easily damaged.
In addition, since prior art blowers are usually of metal construction, they are susceptible to corrosion caused by moisture and pollutants, thus requiring frequent repairs. In general, prior art blower covers are very costly to manufacture as it requires expert sheet-metal craftsmanship, as well as good welding skills for the manufacture thereof.
In Applicant's Korean Patent Application Number 10-1999-0028227, the document details a blower fan and housing that absorbs and decomposes air pollutants. This document discloses the use of certain materials for the fan and housing of a blower that absorbs or decomposes air pollutants. The Korean 10-1999-0028227 document specifies various types of materials that are suitable for use in a blower and can absorb or degrade air pollutants.
A need exists to dramatically lower the cost of blower covers. A further need exists for blower covers that are resistant to corrosion and can absorb or decompose air pollutants. A further need exists for a blower cover that can be easily assembled at the work site without the requirement for expert knowledge, i.e., sheet-metal and welding skills.
SUMMARY OF THE INVENTION
The present invention provides an apparatus and method for a blower cover of a heat exchange unit. The blower cover includes at least two side plates positioned substantially opposite one another, and a rollable sheet positioned between the two side plates. Two rollable connectors, one for each of the side plates, each including upper and lower walls that are parallel to each other and a rib that connects to and spaces apart the upper and lower walls so that each of the rollable connectors forms a substantially H-shaped cross-section. The upper wall of the rollable connectors include upper left and right legs, and the lower wall includes lower right and left legs. The legs of the rollable connectors are either positioned either to the left or right side of the rib. The upper right leg of the rollable connectors is generally longer than the lower right leg. The upper right leg of the connectors include a lip extension that extends from an open end of the upper right leg perpendicularly downwards, towards the lower right leg to form a substantially L-shaped cavity between the upper and lower right legs and the lip extension. A left cavity is formed by the rib and the upper and lower legs of the rollable connector. The edge portions of each of the side plates is secured in and along the L-shaped cavity of the rollable connectors. The side edges of the rollable sheet are each secured in the left cavities of the rollable connectors.
The blower cover of the present invention solves the various problems associated with prior art blower covers. The apparatus and method of the present invention permits on-site manufacture of the blower covers without the requirement for expert skills.
The blower cover of the present invention can be easily assembled by using rollable components, including the rollable sheet and the rollable connectors for connecting the sheet to the side plates. These components are easily transportable as well since they can be compacted by being rolled or coiled.
REFERENCES:
patent: 3859816 (1975-01-01), McDonald et al.
patent: 4416327 (1983-11-01), Nakada et al.
patent: 4458502 (1984-07-01), Adachi et al.
patent: 4702087 (1987-10-01), Nakajima et al.
patent: 4974421 (1990-12-01), Kim
patent: 5638693 (1997-06-01), Back
patent: 6101829 (2000-08-01), Robinson
patent: 10-1999-0028227 (1999-10-01), None
Bacon & Thomas PLLC
Doerrler William C.
Shulman Mark
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