Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3898019 A
Publication typeGrant
Publication dateAug 5, 1975
Filing dateNov 23, 1973
Priority dateOct 19, 1973
Publication numberUS 3898019 A, US 3898019A, US-A-3898019, US3898019 A, US3898019A
InventorsFekete Ernoe A, Reznick David E
Original AssigneeFekete Ernoe A, Reznick David E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Air fan apparatus
US 3898019 A
Abstract
Apparatus comprising a plurality of centrifugal fans arranged in transverse pairs, one pair above the other, to discharge their air output into a common plenum, thereby reducing both the cost, weight and the volume of space that would be occupied by fewer larger air fans of like capacity, and also obtaining a more efficient air distribution in the respective upper and lower portions of the plenum. Each of said fans has its scroll-type housing fixedly mounted on a support frame and its fan rotor, shafts, bearings, drive motor, and drive, mounted on vibration-damping components mounted on said frame which, thereby isolating said fan housing from the effects of such vibration.
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent [191 Reznick et al.

[ 1 Aug. 5, 1975 Los Angeles, Calif. 90004; Ernoe A.

Fekete, 9835 La Docena Ln, Pico-Rivera, Calif. 90660 [22] Filed: Nov. 23, 1973 [21] Appl. No; 418,749

Related U.S. Application Data [63] Continuation-impart of Ser. No. 408,164, Oct. 19,

1973, abandoned.

3.404.539 10/1968 Laing 0. 417/362 X FOREIGN PATENTS OR APPLICATIONS 221,554 4/1960 Austria 417/363 Primary E.ranzinerWi11iam L. Freeh Assistant E.\'aminerRichard E. Gluck [57] ABSTRACT Apparatus comprising a plurality of centrifugal fans arranged in transverse pairs, one pair above the other, to discharge their air output into a common plenum, thereby reducing both the cost, weight and the volume of space that would be occupied by fewer larger air fans of like capacity, and also obtaining a more efficient air distribution in the respective upper and lower portions of the plenum. Each of said fans has its scrolltype housing fixedly mounted on a support frame and its fan rotor, shafts, bearings, drive motor, and drive, mounted on vibration-damping components mounted on said frame which, thereby isolating said fan housing from the effects of such vibration.

2 Claims, 4 Drawing Figures [52] U.S. Cl 417/362; 417/363 [51] Int. Cl. F04B 17/00; F04B 35/00 158] Field of Search 417/362, 363; 248/15, 20, 248/21 [56] References Cited UNITED STATES PATENTS 2.191.418 2/1940 Allen 248/15 2,496,720 2/1950 Heiman.-. 417/362 X 3,169,737 2/1965 Wilson 417/362 X 1 1 ,1 l l 1 1r 1 1 AIR FAN APPARATUS CROSS REFERENCE TO RELATED APPLICATION This application is a continuation-in-part of pending application, Ser. No. 408,164, filed Oct. l9, I973 now abandoned and bearing title AIR FAN APPARATUS.

BACKGROUND OF THE INVENTION FIELD OF THE INVENTION In air conditioning units such as roof-top and other installations of ventilating and related equipment.

The prior art in the field of roof-top and like ventilating apparatus, in the past, involved the installation of centrifugal fans in such apparatus that are the largest in size and output required, such fans comprising unitary components, all portions of which are subject to the vibration generated during operation.

SUMMARY OF THE INVENTION The provision of at least one pair of air fans, the sum of the flow capacities of which is comparable to the capacity of a single, larger air fan, and placing two such fans in side-by-side relation so their air output will uniformly enter and pass through a plenum to serve apparatus such as a furnace or a cooling coil.

By providing two such pairs of air fans in spaced vertical relation the upper pair of fans will direct a uniform flow of air transversely across the upper portion of the plenum to a furnace, for instance, while the lower pair of fans will direct a uniform flow of air transversely across the lower portion of the plenum to a cooling coil, for instance.

The above arrangement of air fans is superior to two larger size air fans of equal flow capacity for the several reasons above set forth.

Further, since the larger the fan, the greater is the vi' bration of the rotor thereof, by reducing the size of the rotor of two smaller fans of equal air-moving capacity, the lesser is the vibration that is transmitted by such smaller rotors. The present apparatus not only reduces the size of the centrifugal fans used, as hereinabove indicated, the housings and the rotors thereof are also physically spaced and unconnected, the former being fixedly mounted on the support frame of the apparatus and the rotors mounted on vibration-damping means as above indicated.

It is an object of the present invention to not only provide improvement in efficiency of air flow of air fan apparatus, and provides apparatus that is lower in ini tial cost, less expensive to maintain in operation and less consuming of space, but, also, isolates the frame and fan housings of the apparatus from the vibration effect produced by the fan rotors.

This invention also has for its objects to provide such means that are positive in operation, convenient in use, easily installed in a working position and easily disconnected therefrom, economical of manufacture, relatively simple, and of general superiority and serviceability.

The invention also comprises novel details of construction and novel combinations and arrangements of parts, which will more fully appear in the course of the following description, which is based on the accompanying drawing. However, said drawing merely shows, and the following specification merely describes, one embodiment of the present invention, which is given by way of illustration or examply only.

In the drawing, like reference characters desginate similar parts in the several views.

BRIEF DESCRIPTION OF THE DRAWING FIG. I is a side elevational view ofa portion of a ventilating or comparable support frame provided with air fan apparatus according to the present invention.

FIG. 2 is a cross-sectional view as taken on the plane of line 22 of FIG. 1.

FIG. 3 is a broken and enlarged side view of support means that mounts all elements of the driven and rotating portions of the air fans of said apparatus.

FIG. 4 is an additional cross-sectional view as taken on the plane of line 2-2 of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT The present air fan apparatus is shown as being mounted on a support frame 5. In most instances, said frame is of the rooftop type. Such support frames usually comprise a base portion 6, and a top portion 7, said portions 6 and 7 being fixedly connected by a plurality of vertical members 8 at the front and rear of the support frame. The parallelepided frame thus provided is shown, in this case, with a floor 9, and certain of the front and rear members 8 are connected by a lower mounting plate 10 and a similar upper plate II. A transverse channel 12 is affixed to the frame part 7, extending from the front to back of said frame.

The above-described support frame 5 is intended as exemplary of such frames for fixedly mounting lower and upper pairs of centrifugal air fans l3 and 14, respectively, in a cross-compound arrangement. In this case, only the scroll-type housings 15 of said fans 13 and 14 are affixed to the frame 5, the outlet portions 16 thereof being fixedly connected to the respective mounting plates 10 and 11. Each fan housing 15 has the usual air inlet 17 formed in one of both sides of the housings 15.

Each of the fans 13 and 14 is provided with a rotor 18 that is physically spaced from the housings 15 of the respective fans and may be of the usual design for airmoving cooperation with the scroll shape of the respective housings 15. The rotors 18 that are in crosscompound relation are connected by a shaft 19 one shaft for the rotor in the housing of the fans 13 and the other for the rotor in housings of the fans 14.

The mentioned shafts 19 are each provided with a pulley 20, a belt 2] connecting said pulleys so one shaft 7 l9 drives the other.

The above-described structure, both in the front and rear of the centrifugal fans 13 and 14, is provided with vibration-isolating or damping components 25 which extend between the frame portions 6 and 7, as shown in FIG. 1. Each said component 25 extends between a lower fitting 26 affixed to the frame floor 9, and the mentioned transverse channel 12 affixed to the frame member 7.

Each said component 25 comprises a vertical angle member 27 which, in vertically spaced relation, according to the spaced relation of the fans 13 and 14, provided with pillow blocks 28 in which said shafts 19 are journalled.

As best shown in FIG. 3, each component 25 has its angle member 27 provided with a foot 29 that is supported on compressible snubbers 30 extending upwardly from the fitting 26, thereby allowing said members to move vertically, i.e., allow vertical vibration thereof, according to the vibration of the rotor 18 of the two vertically spaced centrifugal fans 13 and 14 adjacent each respective component 25.

This snubber means is shown as including an expansion spring 31 which may be regulated by screw adjustment means 32 carried by the mentioned foot 29.

At the upper end of each said component 25, the angle members 27 are connected to the channel 12 at the top of frames by a snubber means 33 which comprises two pairs of compressible cups 34, one pair on each side of the angel member, coil springs 34a interposed between the cups, and screw means 35 engaged with each cup to regulate the resistance to lateral movement of the vibration-isolating components 25 as caused by vibratory movement of the fan rotors by varying the tension of said springs 34a.

It will be clear from the foregoing that the components 25, when caused to vibrate by vibratory movement of the fan rotors, is snubbed by regulatable means both vertically and laterally, thus materially lessening transmission of such vibratory movement not only to the housing of the fans but also the frame of the apparatus.

By substituting two pairs of smaller centrifugal fans for the ordinary larger and more massive centrifugal fans, the vibrator factor is reduced to a greater proportionate degree, as hereinbefore discussed. The structural factors required in the design of the vibrationisolating means that snub the vibration of four smaller fans than would be required for two larger fans of equal output. represents the costand weight-saving that was hereinbefore explained.

An electric or other type of motor 36 is provided to drive the pairs of fans 13 and 14 by means of a pulley and belt drive 37. FIG. 1 shows such a drive connecting the motor with the shaft 19 of the pair of fans 13, but said drive may be connected to the shaft 19 of the pair of fans 14, if desired.

The motor 36 is shown as mounted on a cross plate 38 that spans between and connects the angle members 27 of the vibration-damping component 25. Thus, any vibrations generated by the rotor 18 of said fans 13 and [4 are dampened by said components so that not only the fan rotors, their shafts, and the bearings of the latter, but also the drive motor 36 are isolated from the operative vibrations of the fan rotors.

While the foregoing has illustrated and described what are not contemplated to be the best modes of carrying out the invention, the constructions are, of course, subject to modification without departing from the spirit and scope of the invention.

Having thus described the invention. what is claimed and desired to be secured by Letters Patent is:

l. Air fan apparatus comprising a rigid frame mounted on a support base, said frame being provided with a top portion;

fan means comprising two vertically spaced pairs of centrifugal air fans, the housing of said fans being each fixedly mounted on said frame, the fans of each pair being horizontally aligned, the rotors of each pair being disposed on a common axis, and a single drive shaft connecting the two rotors of each pair of fans,

a single drive belt connecting said two drive shafts,

a drive motor,

a drive belt connecting said motor with one of the mentioned drive shafts to thereby drive the rotors mounted on the latter drive shaft and to simultaneously drive the other drive shaft and the rotors thereon through the single drive belt, and

two vibration-damping components, one on each side of the fan means and extending between the support base and the top portion of the frame, said vibration-damping components mounting the two mentioned drive shafts and the drive motor, whereby the vibrations generated by the fan rotor and the drive motor are dampened during operation of both pairs of air fans.

2. The air fan apparatus according to claim 1 in which only the shaft common to one pair of air fans is directly driven by the drive motor and the drive shaft common to the other pair of air fans being driven only by the shaft of the motor-driven pair of air fans.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2191418 *Mar 17, 1939Feb 20, 1940American Coolair CorpFan mounting
US2496720 *Sep 9, 1946Feb 7, 1950Heiman Sidney JHeater fan mounting
US3169737 *Aug 2, 1962Feb 16, 1965Carrier CorpVibration isolation system
US3404539 *Apr 10, 1967Oct 8, 1968Laing Vortex IncAir conditioning apparatus
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4008007 *May 23, 1975Feb 15, 1977Hudson Products CorporationAxial flow fan assembly
US4108580 *Dec 8, 1976Aug 22, 1978Felter John VAttic fans
US7137775Mar 22, 2004Nov 21, 2006Huntair Inc.Fan array fan section in air-handling systems
US7179046Jun 15, 2005Feb 20, 2007Huntair Inc.Fan array fan section in air-handling systems
US7527468Nov 9, 2006May 5, 2009Huntair, Inc.Fan array fan section in air-handling systems
US7597534Mar 31, 2005Oct 6, 2009Huntair, Inc.Fan array fan section in air-handling systems
US7914252Mar 24, 2008Mar 29, 2011Huntair, Inc.Fan array fan section in air-handling systems
US7922442Oct 31, 2007Apr 12, 2011Huntair, Inc.Fan array fan section in air-handling systems
US8087877Jun 8, 2009Jan 3, 2012Huntair, Inc.Fan array fan section in air-handling systems
US8323002 *Jun 11, 2009Dec 4, 2012Fu Zhun Precision Industry (Shen Zhen) Co., Ltd.Heat dissipation device and fan assembly thereof
US8398365Nov 10, 2011Mar 19, 2013Huntair, Inc.Modular fan units with sound attenuation layers for an air handling system
US8414251Jul 11, 2012Apr 9, 2013Huntair, Inc.Modular fan housing with multiple modular units having sound attenuation for a fan array for an air-handling system
US8419348Apr 5, 2011Apr 16, 2013Huntair, Inc.Fan array fan section in air-handling systems
US8556574Jul 11, 2012Oct 15, 2013Huntair, Inc.Fan array fan section in air-handling systems
US8562283Oct 29, 2012Oct 22, 2013Huntair, Inc.Fan array fan section in air-handling systems
US8694175Jul 11, 2012Apr 8, 2014Huntair, Inc.Fan array fan section in air-handling systems
US8727700Mar 28, 2013May 20, 2014Huntair, Inc.Fan array fan section in air-handling systems
US8727701Apr 3, 2013May 20, 2014Huntair, Inc.Modular fan housing with multiple modular units having sound attenuation for a fan array for an air-handling system
US8734086Apr 3, 2013May 27, 2014Huntair, Inc.Modular fan housing with multiple modular units having sound attenuation for a fan array for an air-handling system
US8814533 *Feb 23, 2011Aug 26, 2014Mark ExnerFlood water removal system
US20050180846 *Mar 31, 2005Aug 18, 2005Huntair Inc.Fan array fan section in air-handling systems
US20050232753 *Jun 15, 2005Oct 20, 2005Huntair Inc.Fan array fan section in air-handling systems
US20060269392 *May 26, 2005Nov 30, 2006Wen-Hao LiuComposite type transverse flow fan
US20070104568 *Nov 9, 2006May 10, 2007Hopkins Lawrence GFan array fan section in air-handling systems
US20080187433 *Oct 31, 2007Aug 7, 2008Hopkins Lawrence GFan array fan section in air-handling systems
US20080279677 *Mar 24, 2008Nov 13, 2008Hopkins Lawrence GFan array fan section in air-handling systems
US20090285669 *Jun 8, 2009Nov 19, 2009Hopkins Lawrence GFan array fan section in air-handling systems
US20100166574 *Jun 11, 2009Jul 1, 2010Fu Zhun Precision Industry (Shen Zhen) Co., Ltd.Heat dissipation device and fan assembly thereof
US20110142687 *Feb 23, 2011Jun 16, 2011Fess CorporationFlood water removal system
US20110212679 *Apr 5, 2011Sep 1, 2011Huntair, Inc.Fan array fan section in air-handling systems
CN103982450A *May 16, 2014Aug 13, 2014林陈花Combined fan air inducing device
Classifications
U.S. Classification417/362, 417/363
International ClassificationF04D25/00, F04D29/60, F04D25/16, F04D29/62
Cooperative ClassificationF04D25/166, F04D29/626
European ClassificationF04D29/62C2, F04D25/16C