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Publication numberUS3732030 A
Publication typeGrant
Publication dateMay 8, 1973
Filing dateMar 2, 1972
Priority dateMar 2, 1972
Publication numberUS 3732030 A, US 3732030A, US-A-3732030, US3732030 A, US3732030A
InventorsMullings D
Original AssigneeGen Electric
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Blower wheel assembly
US 3732030 A
Abstract
By the present invention there is provided a blower wheel housing having generally parallel side walls including an air inlet and a wrapper connecting the side walls to form a hollow chamber. A blower wheel is located in the housing and is axially aligned with the inlet opening. Access to the blower wheel for its removal or servicing is provided by peeling back the wrapper radially away from the blower wheel.
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Description  (OCR text may contain errors)

nited States Patent 1 Mullings 1 May 8, 1973 [54] BLOWER WHEEL ASSEMBLY [75] Inventor: Donald M. Mullings, Yardley, Pa.

[73] Assignee: General Electric Company, Louisville, Ky.

[22] Filed: Mar. 2, 1972 [21] Appl. No.: 231,223

[52] US. Cl ..415/219 [51] Int. Cl. ..F04d 29/42, F04d 29/40 [58] Field of Search ..415/219 C, 204, 206

[56] References Cited UNITED STATES PATENTS 927,313 7/1909 Bemiller ..415/204 1,609,545 12/1926 Hanf 415/219 C 1,978,459 10/1934 Hegan .415/219 C 2,482,519 9/1949 Schwarz... ..415/219 C 3,485,443 12/1969 Earhart ..415/219 C 3,619,080 11/1971 Bullock ..4l5/219 C 3,627,442 12/1971 Brandt ..415/219 C Primary Examiner-Henry F. Raduazo Att0rneyWalter E. Rule et a1.

[57] ABSTRACT By the present invention there is provided a blower wheel housing having generally parallel side walls including an air inlet and a wrapper connecting the side walls to form a hollow chamber. A blower wheel is located in the housing and is axially aligned with the inlet opening. Access to the blower wheel for its removal or servicing is provided by peeling back the wrapper radially away from the blower wheel.

4 Claims, 4 Drawing Figures BLOWER WHEEL ASSEMBLY BACKGROUND OF THE INVENTION The present invention relates to a blower housing construction containing a blower wheel and drive motor, and is more particularly concerned with access to the housing interior for servicing or replacement of the blower wheel and motor. Generally the design and dimensions of a blower housing including the air inlet and outlet openings play an important part in delivering static pressure and efficiency of the blower wheel. To prevent a decrease in pressure due to leakage and recirculation around the inlet areas it is customary to design the dimension of the inlet openings to be smaller than the diameter of the blower wheel. The housing is further designed with a cut-off portion whose function it is to direct the air stream to the outlet area so as to prevent recirculation. When properly designed the shape of the cut-off, the distance it projects into the outlet and its proximity to the blower wheelusually results in outlet dimensions that are smaller than the diameter of the blower. The above design requirements generally prevent the removal of the blower wheel from the housing, and access to it is very difficult without resorting to construction that requires separate and removable parts.

These design restrictions have resulted in many attempts to design housings wherein means are provided in which blower wheels may be removed for service. One approach is shown in US. Pat. No. 3,627,442 Brandt issued Dec. 12, 1971 and assigned to General Electric, assignee of the present invention wherein the blower housing is disassembled to obtain access to the blower wheel. Some of the other attempts to gain access to the blower wheel have been in providing separate parts. For example, In U.S. Pat. No. 1,978,459 issued Oct. 30, 1934, removable inlet rings have been used to cover larger openings that would allow the blower wheel to pass through. Another approach as shown in US. Pat. No. 3,191,851 issued June 29,1965, has been to use two-piece wrappers wherein a separate piece has been used in the cut-off area adjacent the outlet of the housing, thus allowing the blower wheel to be removed through the outlet area.

While these attempts have provided access to the blower wheel for replacement and service, they have resulted in undue increase in manufacturing, material and fabrication cost. It is therefore an object of this invention to provide an improved blower wheel housing wherein access to the blower wheel is provided without removing structural parts from the housing.

SUMMARY OF THE INVENTION A blower housing is provided having generally parallel side walls and an airinlet opening in at least one of the side wallsjA one-piece wrapper connects the side walls to form the peripheral wall on the housing. The blower wheel is located in the housing and is axially aligned with the inlet opening. One of the ends of the peripheral wall is radially spaced from the blower while the other end is located tangentially and spaced apart from the radial end to form the outlet. In the present embodiment only a portion of the wrapper including the tangentially disposed end is permanently secured to the side walls, the remaining portion of the. wrapper including the radially disposed end is arranged to rest on support means provided on the inner surface of the side walls with the radially disposed end removably attached thereto.

To service or remove the blower wheel from the blower housing, the radially disposed end of the wrapper is released from the side walls and the portion of the wrapper resting on the support means is moved radially from the blower wheel without disturbing the side walls.

BRIEF DESCRIPTION OF THE DRAWING One embodiment of the present invention is illustrated in the accompanying drawings wherein:

FIG. 1 is a perspective elevational view of one embodiment of the invention removed from the mounting plate;

FIG. 2 is an end elevational view of the blower housing with parts broken away to show the interior of the housing;

FIG. 3 is an exploded perspective view showing the main parts of the blower housing in detail; and

FIG. 4 is a fragmentary sectional view taken along line 4--4 of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIGS. 1 and 2 there is illustrated a blower housing assembly 11 employing an embodiment of the present invention. The blower housing 11 comprises a pair of spaced apart parallel end walls 12 and 13, each of which is shown with an air inlet 14 and 15 respectively and a one-piece wrapper 16. The wrapper 16 is generally scroll shaped with an outer peripheral wall 17 having its axially disposed edges 18 extending to the end walls to form a hollow housing. The peripheral wall 17 of wrapper l6v extends from a radially spaced end 19 and continues circumferentially to a generally flat tangentially disposed portion2l arranged parallel to a cut-off section 22 projecting radially outwardly from the end 19 and spaced therefrom to form a tangential outlet 23. The blower assembly 11 includes a rotatable blower 24 and a motor 26 for driving the blower wheel 24. The drive motor 26 is provided with an output shaft which is fastened to the center of the blower wheel partition. In the embodiment shown herein the blower 24 is supported by the drive shaft of the motor, with the motor 26 positioned on one of the air inlets in the end wall 13. The motor 26 is supported by a series of radially spaced supporting arms 27. Each of the arms 27 includes an ear 28 which is fastened to the arms 27 and the end wall 13 in a manner to allow air space around the motor housing and into the blower wheel.

The blower housing 11 may be used in conjunction with a forced air furnace (not shown) or similar appliance that requires the movement of air. FIG. 1 shows one means of mounting the blower housing 11 for use in a suitable appliance. A mounting plate 30 suitably dimensioned and oriented to supply the proper movement of air to an appliance is provided with an air outlet or opening 31. Two opposite and generally parallel sides of the opening 33 are provided with the depressed tracks or support flanges 32. A third or rear side is provided with the similar support flange 33. To support the blower housing 11 on the mounting plate 30 the top edges of the side walls 12 and 14 are provided with flanges 34 which are slidably supported on tracks 32 (FIG. 2) while the tangentially disposed portion 21 of the peripheral wall 17 has a flange 36 which is supported on the front flange 33 when the assembly 11 is located on plate 30. It will be apparent that the blower housing 11 may be installed or removed from the mounting plate 30 by simply sliding the flanges 34 of the housing 11 into or out along the track members 32.

Referring now to FIG. 3, the side walls 12 and 13 have substantially straight edges or portions 37 and 38 extending downwardly from the ends of the flanges 34 and merge with a generally semi-circular or arcuate bottom edge or portion 39. The peripheral edges of portions 37, 38 and 39 of each end wall are bent axially outwardly to form a flange or support 41. Starting at the peripheral end 19, a portion of the axially disposed ends 18 of the wall 16 are permanently secured as by welding or other suitable means, to the support flange 41 along the straight edge portion 38 to form the tangential wall 21 leading to the outlet 23, and continuing along arcuate portion 39 to the approximate tangent point of 39 and 37. The remaining portion of the wrapper 16 is provided with a reduced axial dimension so as to fit between the end walls 12 and 13 to complete the peripheral wall 17 of the housing 11. To insure that peripheral wall 17 of the wrapper 16 continues in a scroll-like configuration beyond the arcuate portion 39 and the tangent point of 39 and 37, the side walls 12 and 13 are provided with a support means or tabs 42. The tabs 42 are arranged, starting generally in the area of the tangent point of 39 and 37, and continue in a line simulating a scroll shape around the inlet openings 14 and on each of the end walls 12 and 13. Each of the support means or tabs 42 is formed by lancing the side walls and pushing the stock below the lance axially inwardly to form a plurality of support surfaces. In the final assembly step of the blower housing, the portion of the peripheral wall 17 that is not welded to the side walls, as heretofore mentioned, is inserted between the side walls 12 and 13 and onto the support tabs as shown in FIG. 4. The portion of the peripheral wall 17 resting on the support tabs is removably held in this position by fastening the end 19 of the peripheral wall 17 to the side walls in the following manner.

Holding means 43 are provided on the axial edge 18 adjacent the end 19 of the peripheral wall 17 to receive sheet metal screws 44 that are adapted to be inserted through holes 45 in the side walls 12 and 13. The holding means 43 consists of groups of parallel slits with the stock between the slits being offset alternately in opposite directions to form generally semi-circular tongues 46 which define in effect a recess for the reception of the screws 44. The screw threads and the offsetting of the tongues 46 are dimensioned so that the screw 44 is forced into the space between them to effectively hold the wrapper 16 in its scroll shape configuration. In practice, to service the motor or blower it is merely necessary to remove screws 44 and peel back the peripheral wall portion supported on tabs 42 to the position indicated by dotted lines in FIG. 3.

The portion of the side walls disposed outside of the blower housing may be provided as illustrated in FIGS. 1 and 3 with openings 47 of various dimensions and sha es. The openings 47 as illustrated in the present em odlment are un ized for mounting a motor capacitor 48 and quick disconnect devices 49 which would allow the removal of the blower housing from the mounting plate 30 and appliance by unplugging the electrical connections. Other of the openings 47 may be dimensioned to support other components that may be utilized in the operation of the appliance in which the blower housing 11 may be installed.

From the foregoing description it will be apparent that the present invention provides a one piece wrapper 16 having a portion of its peripheral wall 17 arranged to be removably fastened between the side walls 12 and 13 of the housing 11 so as to be movable from a position wherein it is part of the peripheral wall of the blower housing to a position away from the blower assembly and out from between the side walls 12 and 13 to afford access to the housing interim and the blower wheel assembly for removal or servicing.

While in accordance with the Patent Statutes, there has been described what, at present, is considered to be the preferred embodiment of this invention, it will be obvious to those skilled in the art that various changes and modifications maybe made thereto without departing from the invention, and it is intended therefore in the appended claims to cover all such changes and modifications as fall within the true spirit and scope of this invention.

1 claim:

1. In a blower housing having generally parallel side walls, an air inlet in at least one of said side walls, a onepiece wrapper connecting said side walls to form the peripheral wall of said housing, the peripheral ends of said wrapper being spaced to provide an air outlet, a blower removably mounted in said housing, the improvement comprising:

means permanently securing a portion of the axially disposed edges of said wrapper to said end walls extending inwardly from one of said peripheral ends;

a plurality of tabs formed on said side walls and projecting into said housing for supporting the other portion of the axially disposed edges of said wrapper;

holding means formed on the axial edges and adjacent the other peripheral end of said wrapper for removably fastening said wrapper to said side walls whereby said other portion of said wrapper is movable radially away from said blower wheel for access to said blower wheel.

2. A blower housing as set forth in claim 1, wherein the side walls have substantially straight edge portions merging with an arcuate edge portion.

3. A blower housing as set forth in claim 2, wherein a portion of the wrapper is permanently secured to one of the straight edge portions and said arcuate edge portion.

4. A blower housing as set forth in claim 3, wherein the other portion of the wrapper is dimensioned to fit between said side walls to engage said support tabs.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US927313 *Oct 3, 1908Jul 6, 1909Giles AthertonApparatus for curling and ironing the edges of hat-brims.
US1609545 *Jan 13, 1926Dec 7, 1926 Blower housing or pan casing
US1978459 *May 31, 1932Oct 30, 1934American Air Filter CoFan or blower housing
US2482519 *Jul 19, 1947Sep 20, 1949Air Controls IncSquare sided blower
US3485443 *Dec 12, 1968Dec 23, 1969Trane CoFan scroll
US3619080 *Jan 21, 1970Nov 9, 1971Carrier CorpCentrifugal fan housing
US3627442 *May 14, 1970Dec 14, 1971Gen ElectricBlower housing
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4867640 *Jul 22, 1987Sep 19, 1989Broan Manufacturing Co., Inc.Exhaust fan for bathrooms and the like
US5052888 *Jul 11, 1990Oct 1, 1991Ibm CorporationDC motor driven centrifugal fan
US5690470 *Oct 30, 1996Nov 25, 1997Lennox Industries Inc.Blower housing and apparatus for assembly thereof
US6802770Dec 3, 2002Oct 12, 2004Broan-Nutone LlcVentilating exhaust fan
US6979169Nov 21, 2003Dec 27, 2005Broan-Nutone LlcModular ventilating exhaust fan assembly and method
US7128303Apr 2, 2004Oct 31, 2006Broan-Nu Tone LlcFan mounting spacer assembly
US7203416Nov 21, 2003Apr 10, 2007Broan-Nutone LlcVentilating and heating apparatus with heater shielded by tapered discharge duct
US7455500Dec 6, 2005Nov 25, 2008Broan-Nu Tone LlcModular ventilating exhaust fan assembly and method
US8056933Apr 6, 2007Nov 15, 2011Dometic CorporationQuick connect flange plate
US8678759 *Jun 26, 2008Mar 25, 2014Panasonic CorporationCentrifugal fan
US20050111840 *Nov 21, 2003May 26, 2005Craw Gary J.Ventilating and heating apparatus and method
US20050111972 *Nov 21, 2003May 26, 2005Broan-Nutone LlcModular ventilating exhaust fan assembly and method
US20050218289 *Apr 2, 2004Oct 6, 2005Penlesky Robert GFan mounting spacer assembly and method
US20100183433 *Jun 26, 2008Jul 22, 2010Panasonic CorporationCentrifugal Fan
DE4219642C1 *Jun 16, 1992Oct 14, 1993Gebhardt VentilatorenVentilation device contg. blower - involves blower outlet facing room to be served having number of air guide sheets moving delivered air from middle area of room to sides
DE10145353B4 *Sep 14, 2001Jul 4, 2013Krones AktiengesellschaftPumpe und Verfahren zu ihrer Herstellung
Classifications
U.S. Classification415/214.1, 415/215.1, 415/204
International ClassificationF04D29/42
Cooperative ClassificationF04D29/424
European ClassificationF04D29/42C4C
Legal Events
DateCodeEventDescription
Nov 14, 1997ASAssignment
Owner name: AMERICAN STANDARD, INC., NEW JERSEY
Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK);REEL/FRAME:008869/0001
Effective date: 19970801
Nov 13, 1997ASAssignment
Owner name: AMERICAN STANDARD, INC., NEW JERSEY
Free format text: RELEASE OF SECURITY INTEREST (RE-RECORD TO CORRECT DUPLICATES SUBMITTED BY CUSTOMER. THE NEW SCHEDULE CHANGES THE TOTAL NUMBER OF PROPERTY NUMBERS INVOLVED FROM 1133 TO 794. THIS RELEASE OF SECURITY INTEREST WAS PREVIOUSLY RECORDED AT REEL 8869, FRAME 0001.);ASSIGNOR:CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK);REEL/FRAME:009123/0300
Effective date: 19970801
Jun 2, 1993ASAssignment
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Effective date: 19930601
Jun 28, 1988ASAssignment
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Effective date: 19880624
Owner name: BANKERS TRUST COMPANY, 4 ALBANY STREET, 9TH FLOOR,
Free format text: SECURITY INTEREST;ASSIGNOR:TRANE AIR CONDITIONING COMPANY, A DE CORP.;REEL/FRAME:004905/0213
Owner name: BANKERS TRUST COMPANY, NEW YORK
Jul 5, 1985AS03Merger
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Owner name: TRANE COMPANY THE A DE CORP.
Effective date: 19831222
Jul 5, 1985ASAssignment
Owner name: TRANE COMPANY THE A DE CORP.
Free format text: MERGER;ASSIGNOR:TRANE CAC, INC., A CORP OF DE;REEL/FRAME:004432/0755
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Feb 14, 1985ASAssignment
Owner name: AMERICAN STANDARD INC., A CORP OF DE
Free format text: MERGER;ASSIGNORS:TRANE COMPANY, THE;A-S SALEM INC., A CORP. OF DE (MERGED INTO);REEL/FRAME:004372/0349
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Aug 13, 1984ASAssignment
Owner name: TRANE COMPANY, THE
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Owner name: TRANE COMPANY, THE, A WI CORP
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Sep 23, 1982ASAssignment
Owner name: TRANE CAC, INC., LA CROSSE, WI, A CORP. OF DE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GENERAL ELECTRIC COMPANY A NY CORP.;REEL/FRAME:004053/0022
Effective date: 19820915