Reduced noise air conditioning and heating systems
a technology of air conditioning and heating system, applied in the direction of heating types, lighting and heating apparatus, ducting arrangement, etc., can solve the problems of unnecessarily large system, unnecessarily large noise, and large noise of existing column air handling units, so as to reduce the amount of noise generated
Inactive Publication Date: 2008-08-14
DUKE CARL H
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0007]The use of a plenum fan and direct drive motor advantageously reduces the amount of noise generated by the column air handling system; particularly in view of prior art vane-axial fan systems.
[0008]Additional embodiments of the principles of the present invention include a fan assembly, which includes the plenum fan and the direct drive motor and which is extendable from a given side of the fan unit. Preferably, the extendable fan unit is disposed low in the column unit (e.g. just above a base unit that allows the column air handling system to discharge air under a raised floor), such that the plenum fan and direct drive motor are easily accessible for replacement or servicing.
Problems solved by technology
However, existing column air handling units are subject to a number of significant disadvantages.
For example, the column air handling units disclosed in U.S. Pat. No. 6,402,612 and U.S. Pat. No. 6,267,665 utilize vane-axial fans, which operate at high speed and high pressure and hence generate a substantial amount of noise, which force the use of inlet and outlet silencers, such as cones, to make the generated noise level acceptable.
Additionally, these systems utilize a high pressure design known as static regain that requires a series of hand manufactured tunnels and cones to enhance fan performance, which make the systems unnecessarily large and more expensive.
Furthermore, the primary coils are provided on two opposing sides of the system, thereby requiring a larger space for installation.
Finally, the fan is elevated high in the system which requires extensive field labor during installation, particularly if the fan is shipped uninstalled.
Method used
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[0013]The principles of the present invention and their advantages are best understood by referring to the illustrated embodiment depicted in FIGS. 1-3 of the drawings, in which like numbers designate like parts.
[0014]FIG. 1 is a diagram illustrating a typical application of a column air conditioning / heating unit 100 embodying the principles of the present invention. As shown in FIG. 1, air conditioning / heating unit 100 is vertically disposed between concrete slabs 101a-101b, which are, for example, floors of a multiple floor building. Air conditioning / heating unit 100 is disposed in a space between a pair of horizontally spaced walls 102a and 102b.
[0015]A representative room is defined by wall 102b, a raised floor 103, and an internal ceiling 104. Outside air is provided to conditioning / heating unit 100 from a pre-treatment unit outside the room through a conduit 105 disposed in the space between concrete slab 101a and internal ceiling 104.
[0016]As shown in FIG. 1, primary coils 1...
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A column air handling system includes a coil unit having a set of coils for changing a temperature of an air stream flowing therethrough and a fan unit for driving the air stream through the coil unit. The fan unit includes a plenum fan directly driven by a motor.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims the benefit of U.S. Provisional Patent Application Ser. No. 60 / 850,549, filed Oct. 10, 2006.FIELD OF INVENTION[0002]The present invention relates in general to air conditioning and heating techniques, and in particular to reduced noise air conditioning and heating systems.BACKGROUND OF INVENTION[0003]Air conditioning and heating systems, including column air handling units, are known in the art. However, existing column air handling units are subject to a number of significant disadvantages.[0004]For example, the column air handling units disclosed in U.S. Pat. No. 6,402,612 and U.S. Pat. No. 6,267,665 utilize vane-axial fans, which operate at high speed and high pressure and hence generate a substantial amount of noise, which force the use of inlet and outlet silencers, such as cones, to make the generated noise level acceptable. Additionally, these systems utilize a high pressure design known as static rega...
Claims
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Login to View More IPC IPC(8): F24F13/24
CPCF24F13/24F24F3/0442
Inventor DUKE, CARL H.
Owner DUKE CARL H