US2185718A - Fan - Google Patents

Description

Jan. 2, 1940. ANDERSON 2,185,718

' FAN Filed June 24, 193e v 2 sheets-sheet 1- Jan. 2,y 1940. E. L. ANDERsoN FAN z'sheets-sheet 2 Filed June 24, 1956 Mln-wma v BywA/ra L. Amai/9.50m

2 ,I Y r .l Afro/Mins Patented Jan. 2, 1940 UNITED STATES".

PATENT OFFICE FAN Edward L. Anderson, Detroit, Mich., assigner to American Blower Corporation, Detroit, Mich., a corporation of Delaware v Application June 24, 1936,' sei-lai No. 81,632

18 Claims.

My invention relates to air handling apparatus and in particular to a means and method of sound absorption of air handling fans, cas- -ings and ducts associated therewith.

It is my object to provide in a unit adapted to heating, cooling and humidiflcation, a fan '15 less as possible. I ,n

It is the object of my invention to provide a fan having a high 'speed and relatively high velocity outlet of air that will be noiseless, while at thesame time permitting the fan to travel at its most eflicient speed.

Referring to the drawings:

Figure 1 is a top plan view of a unit embodying my invention with the metal enclosing'casing in section, a portion of the radiator in section,

and a portion of the fan outlet chamber in section. 'I'he section'of'llgure'l is taken on the line I--I oi Figure 3. A

, Figure 2 is a section on the line 2-2 oi.' Figure 1.

Figure 3 is a section on the line 3-3 looking in I.

the direction of the arrows of Figure 1.

Referringl to the drawings in detail, I designates the bottom of a metal casing which has the top 2 and sides 3 and I. An end 5 is provided 35 withan air inlet 6 in which is located a filter 1. The air passes'through the filter and then through the humidifying chamber 8 having a humidifying spray nozzle 9 and baille plate I0. The air then passes through' the radiator II, which may either be for cooling or heating purposes; and thence into the fan chamber I2. 'I'he bottom of this chamber is inclined at I3 so that any entrained` moisture `may drain away through the pipe I 4. l

Within the air inlet chamber I2 vis mounted theO fan casing I5 in which is located alan I6 mounted on the shaft I1 that carries a pulley I8 which is driven by a belt I8 from a smaller pulley 20 on the armature 2I of an electric 50 motor 22. The lateral dimensions of this vortex i fan casing I5 are small in comparison with the' lateral dirnension'soi' the chamber I2. The cover of the chamber I2 is inclined as at 23.

'Ihe sides 'of the fan casing I5 are provided u with air inlet openings 24, through which the substantially noiseless.

(cieco-233) s air enters and is then delivered by the fan I6 from the casing I5 tangentially through the outlet opening into the outlet passageway 28.

This passageway is lined with a sound deadening material 21. The passageway expands ver- 5 tically and laterally as indicated by the posi- Vtioning of the upper wall 28 and lower wall 29,

which progressively are further apart as the air progresses away from the fan I6. The angular y wall 30 actsas'a baiile wall torfdirecting the 10 air into the passageway 26r i The side walls ofthe passageway l3l and v32 likewise are progressively further apart towards the air outlet 33. These side walls are likewise insulated with the sound deadening material 21. l

The course of the air is ilrst through the iilter 1 after entering through the passageway 6, thence through the humidifying chamber 8, radiator II, into the relatively large chamber I2,A

whence the air enters through the air inlet open- `20 ing 24 into the eye of lthe fan and is discharged from the `casing I5 through the opening`25 into the sound insulated, vertically and laterally expanding passageway 2&6, whence it leaves through the opening 33. 25

Despite the fact that this fan is operating within a thin sheet metal casing which emphasizes any noise and handles a large volume of air with an air discharge at a substantial velocity, nevertheless the operation of the unit is 80 This is due to the arrangement of the parts, particularly the air outlet. I

The insulation 21 which is parallel to the rear wall 30 is held in position as it rests upon' the .ll flange 30a at its bottom and against the adjacent edge at its top of the 'top lining 21a. 'I'he forward end vof the topl lining 21a engages with the wall 28a, which forms a recess for receiving the lining 21a. s tion on the wall 29, which insulation is designated 29a, is likewise inserted behind the shoulder 29h at its forward end and is overlapped and engaged at its rear end by the lip I5a,of the fan casing I5 which is suspended from the top 23 of -45 the air inlet chamber I2.

E It will be understood that I desire to comprehend within my invention such modifications as may be necessary to adapt it to varying conditions and uses. 50

Having thus fully describedmy invention, what I claim as new and desire to secure-by Letters Patent, is:

1. In combination, a fan and surrounding fan casing, and an extended air outlet separate from f The lowerv covering of insulasaid fan casing and having a sound deadening lining material therein anddisposed in part between portions of said air outlet and said fan casing and providing support for a part of said fan casingon said air outlet.

2. In combination, a fan and fan casing, and an extended air outlet with progressively expanding side, top and bottom walls and having a sound deadening lining material therein, said outlet being arranged at an acute angle to the line of discharge of the air from the fan casing; and having an angular positionedf baille wall for directing air into said extended outlet.

3.`In combination, a fan casing, a fan therein adapted to discharge upwardly through the top side of said casing, and an air outlet passageway disposed at an acute angle to the direction of fan discharge and communicating with said casing comprising top, bottom and side walls progressively expanding from the inlet to the outlet passageway to the outlet thereof and provided with an interior sound absorbent lining, said outlet passageway wall comprising a sound insulated annular section positioned adjacent said fan for directing vthe air discharged therefrom into said expanded outlet passageway.

4. -In combination, an air inlet chamber a fanv casing located therein and communicating therewith, a fan in said fan casing, a substantially horizontal discharge passageway communicating with said fan casing and disposed at an acute angle to the discharge of said fan, said discharge passageway being progressively larger from its inner end towards its outer end comprising a vertically andlaterally expanding opening and having therein a lining of sound-deadening material. l

5. In combination, an air inlet chamber, a fan casing suspended therein from th'e top thereof, said fan casing having an outlet opening communicating with an outlet opening in the top of said chamber and said fan casing having an air inlet opening communicating with said chamber, a discharge passageway provided with an interior sound absorbent lining and extending from said air outlet opening of the fan casingV progressivelylarger laterally from the inlet end of the outletpassageway to the outletend thereof,

and afan in said fan casing, aportion of said fan.

of the outlet passageway to the outlet end thereof, and a fan in said fan casing, 'said outlet passageway being disposed substantially parallel to the line of ow of the air entering the first-mentioned air chamber and having the lining thereof supporting the forward edge portion of said fan casing.

v'7. In combination, an air inlet chamber, a fan casing suspended therein from the top thereof, said fan casing having an outlet opening communicating with an outlet opening in the top of said chamber and saidV fan casing having an air inlet opening communicating with said inlet chamber, a discharge passageway extending from said l air outlet opening of the fan casing progres-v' sively larger laterally from the inlet end of the.

outlet passageway to the outlet end thereof, andy a fan in said `fan casing, said outlet' passageway having a sound absorbent lining therein and bechamber and at an angle to the line of discharge of the air by the fan from the fan casing and said fan casing having one edge supported'by said outlet passageway and insulated therefrom by a portion of the lining thereof. 8. A new article of manufacture for usev as a fan discharge passageway comprising a casing adapted to be horizontally disposed and having laterally diverging fiatv side walls and diverging flat top and bottom walls, with an air inlet opening in the bottom wall and a fixed wall portion diagonally disposed across the end of the casing over the air inlet opening thereto for directing the air into said fan discharge passageway.

9. A new article of manufacture for use as an air outlet passageway comprising a substantially horizontal passageway having diverging side walls and diverging top and bottom walls, said diver-` gence taking place from the inlet to the outlet end of .the passageway, said passageway having an air inlet opening on the bottom of the inlet end, a xed wall portion diagonally disposed across the inlet end over the air inlet opening,

ingwith the air inlet chamber suspended in the air outlet opening of the air inlet chamber -and communicating therewith, a fan in lthe fan 'casing, and an angularly disposed, expanding discharge casing associated with the fan casing -outlet whereby the air discharged therefrom has its side beginningsubstantially as a continuation of the spiral of said outer wall and extending as a plane surface,diverging from the first side at an acute angle with respect thereto, and two other sides, the last two sides being divergently disposed so as to form a rectangular conduit progressively increasing in cross-sectional area at a greater rate` than that of the space between the periphery of said wheel and said housing, the length of saidY discharge casing with respect to having an impeller wheel, a housing including aspiral outer wall adjacent to the periphery of the wheel, and a discharge outlet lying in aplane approximately tangential to the periphery of the wheeI, said casing including aside. lying mlthe plane of said discharge outlet. an opposed side beginning-substantially as a continuation or the spiral of said outer wall and extending as vaplane surface diverging from the first side at an acute angle with respect thereto, and twoy other sides, the last two sides beingdivergently disposed so as to form'arectangular conduit progressively increasing in cross-sectional area at a greater rate than that of the space between the periphery of said wheel and said housing, the length of said discharge casing with respect to the length of said discharge outlet being such that substantially all atmospheric vibrations within the sonic range originated by said impeller wheel impinge upon a side of the casing at such angles that the majority of such vibrations may be reflected against another side of the casing.

13. A discharge casing for a wheel type blower having an impeller wheel, a housing including a ,spiral outer wall adjacent to the periphery of the wheel, and a discharge outlet lying in a plane approximately tangential to the periphery of the wheel, said casing including a side lying in the plane of said discharge outlet, an opposed side beginning substantially as a continuation of the spiral of said outer wall and extending as a plane surface diverging from the first sideat an acute angle with respect thereto, two other sides, the last two sides being divergently disposedso as to form a rectangular 'conduit progressively in- I creasing in cross-sectional area at a greater rate than that of the space between the periphery of said wheel and said housing, the length of said discharge casing with respect to the length of said discharge outlet being such that substantially all atmospheric vibrations within the sonic range originated by said impeller wheel impinge upon a side of the casing, and sound-absorbing material forming at least the inner surfaces of said sides.

14. A discharge casing for a wheel type blower vhaving an impeller wheel, a housing including a outer wall adjacent to the periphery of spiral the wheel, and a discharge outlet lying in a plane approximately tangential to the periphery of the wheel, said casing including a side lying in the plane of said discharge outlet and an opposed side beginning substantially as a continuation of the spiral of said outer wall and extending as a plane surface diverging from the rst side at an acute angle with respectl thereto, two other lpeller Wheel periphery of said wheel and said outer wall, the

length of said dischargeasing with respect to the length of said discharge outlet being such that substantially all atmospheric vibrations within the sonic range originated by said imimpinge upon a side of the casing at such angles that the majority of such vibrations may be reected against another side of the casing, and sound-absorbing material forming at least the inner surface of said sides.

15. in combination, a fan and fan casing, and an extended air outlet with progressively expanding side, top and bottom walls and having a sound deadening lining material therein to form sound deadening walls, said outlet being arranged at an acute angle to the line of discharge of the air from the fan casing, in which all lines of discharge from the fan intersect a sound deadl ening wall of the discharge passageway.`

16.` 1n combination, a fan rotor and fan casing having an extended air outlet with pairs of oppositely spaced progressively expanding sound deadening walls constituting an extended air outlet disposed at an acute angle to the line of discharge of air from the said fan casing and being arranged `so that all lines of discharge from the fan intersect a sound deadening wall in said passageway.

17. In combination, a fan rotor and fan casingv having an extended air outlet with sound deadening Walls progressively expanding in all directions to form a passageway and constituting an extended air outlet disposed at an acute angle to the line of discharge of air rom the said fan casing and being arranged so that all Alines of discharge from the fan intersect a sound deadening wall in said passageway.

18. In combination, a fan rotor and a fan casing, an extended air outlet in the form of a hollow truncated pyramid having sound deadening walls, said fan and fan casing adapted to discharge therein and being located adjacent the Y apex end of said' pyramid, said fan being so located with respect to the pyramid that all lines of discharge from the fan intercept a sound deadening wall of the pyramid.

' EDWARD L. ANDERSON..A

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