US2334789A - Ventilator - Google Patents

Description

ov. 23, 1943. y c. w. oLsoN K 2,334,789

VEN TILATOR Filed Oct. 27. 1941 2 Sheets-Sheet 1 INVENTOR s ATTO R N EYS mov. 23, 1943. c. w. oLsoN VENTILATOR- Filed oct. 27, 1941 2 Sheets-Sheet 2 R O T N E v N ATTORNEYS v of Figure 4.

Patented Nov; 23, 1943 QVENTILATOR f l v-(larl WL Olson, Minneapolis, Minn.V

application oetofbefzv, i941, serial No. 416,706

` laclantis. cisti-43)@ My invention relatesV torooin ventilationgiand u Y has among its cbjects'and advantagesl'tliepro-l` vision of ,an iinprovedjiangunit' `particuleuly adapted for ltitclmen- Ventilating purposesg' `Heretofore ltitclierifventilators;V have been irl-1Y stalled, in wall. openings;` Such systems have employed chains or sticks. for vopening and closing doorsin the Ventilating'` systememployed as@ i protection against draft and cold. Tloesesyefi tems permit cold to be transmitted 'or conducted through tire-relatively large steel.;suri'aces, which are Vseldonr built. tosuch fa; degree of vmecl'ianical perfection as to*eliminatelriackgrait.,Av

Oflate, ceiling ventilationV hasvbecorne; the general idea* of kitchenzventilatiomuwith .afan

operating behind ajgrill,` intakel positioned` di; f rectly over the-range, andexliaustingthrougli a pipexor eluctbe'tweerntlieiioists Ato the atmosphere. Accordingliv,` an; pbjectrotmy lim/criticit` to A provi-:leva novel? 'Ventilating"units"designed,` for incorporationin the `.Wall olii-,lies ceiling, in wli'ich a novel i centrifuga'r faire orgtizrboblcwer is fern-w manner, andanI which the :system employs self* closing shutters which effectivelyprevent'l back 4 the specific `construction.

' toy a washer-like.air-deflecting plate 32.

la and communicating with a weather hood- `'ze located exteriorly of.` the building Wall 26.-`

Referring to Figures '3' and 4,; which illustrate of `the uri-it lli,` the irilet neck I 3 is locatedat the bottom sideffa fan or blovverrhousing 28=Within` which is mounted an. electricimotor 3l).- VThis motor is'secured The motor" 3tlextendspartly through the "opening in"tl1ezplate.32`,and is secured to the plate by set screws 34. -Projections 36 depend from the top Wall 38` of the housing 28 v'and serve as' mountsfor tlrep'late 32. t Bolts 40 extend through openings in. the plate 32 and are threaded into the projections 36for iixe ly securing the plate, withv rubber cushioning `washers 42 mounted on the bolts between the-plate andthe respective Ylooltl'ieads and projections 33;

To the Vertical motor shaft Mis' secured a centrifugal fan-.or turboblower unit` 45. This unit vcomprises.- adome-shaped shell; onair-de- K ecting,.48 ope-ning' ini` the direction of therriotor ployed'and .designed-ltooperateirrian efficient' circulation and openfin responseto air pressure u generated upon. setting-'the vsystemin opera-tion. Novel means. are' incorporated to protect-"the motor :against accumulationv lofi grease and f dirt,

witlitbe system sofdesignedfasfto (meratelin` an exceedingly silentfmanner. f

In the accompanying drawings: f l liigurel is a sectionalviw-.otafceilingstruca ture illustrating Vmy invention s incorporated therein; i I l l Figure v2 is4 a sectional view ofaiwall structure illustrating the invention incorporated therein;

Figure 3 is abotto ugalfan unit; f

l'i'gurefl` is aside section' i l l man View les nieesami@ elevational-.ritmi partly `iniA the blades 3S and: ofcsucli diameterasf taper-mit themotor' i toprojectaslaor't distance,insideS the shell; To

the shellillii fare connected radial! blades lli lol cated above chemist, neel;- ta and rotating'f-in ai astopr-ovide an;aircirculatingspace 52 extendn ing completely` about the ian unit t6 and ccm-V Figure 5 is a sectional view along tneline ELE of Figure 4; vand Y Figure 6 is a sectional View along the line 5-#5 rIn the embodiment selected for illustration, Figure 1 illustrates the ,centrifugal fan or turboblower unit lil installed in the ceiling structure l2. The uniti@ Vis'of such proportions as to permit'installation thereof between ceiling joists of usual spacing. An `opening Ill is provided in the ceiling face i6 for accommodating an inlet neck I 8 of the unit I0, with a horizontal'duct 2@ connectedwlth an outlet neck 22 of the unit `muriicating Withthe'inletneck I8 as well as the outlet neck .22. Y Y Y Normally closing the outlet neck 221s ai shutter" `56I lying.' against theA end 5810i the` outlet neck. Thelshutter' pivotally connected'at Elli tothe neel; 2.2and'mayfpivot from its normallyclosed` position to :its-fully "opened position, as indicatedV inrdotted lines. `-To the'sliutter A513 is connected a Weight 62 so'located with respect to the pivotal axis of `the shutter as to effectively 'hold the shutter in its closed position and prevent,l accidental opening or rattling thereof. `In addition, the position of the Weight with respect tothe pivot axis issuch as to have a progressively decreasing closing influence on the shutter as it` progresses toward its fully opened position. The shutter opens in response to air pressure generated by the fan unit, and the shutter oiers little resistance when in its fully opened position sro as ENT crimes-j InFig'ure 1, rthe Weather with a shutter 613 normally engaging an 'alout` ment V66 and pivotally connectedat with the weather hood for pivital movement-in the lsame i manner as the shutter 55. 'A Weight .lil is ,atnv tached to the shutter 64 and operates in the same Y .Y not tov obstructv ilovv of exhaust air through the outlet neck 22. Y

hood 2' is provided manner as the Weight E52.V l

One end of i the duct Z vmay be fsoldered to the outlet neck 22 while the other end of the'duct is soldered to a neck 12 on the weather hood 2li.

A grill 14 extends across the inlet neck i8. Y

.82 corresponding to the shutter 6d of'Fgure l.;l In order to render the shutter 56 of the unit l0 Y Aself-closing when the unit is installed'vertically inthe building Wall, a lever 84 is pivotally con- V nected'intermediate its ends with the top wall of the neck 22, as at 86, for closing the shutter A weight E8 is inoperative with respect to closingVV the shutter. When, however, the unit is verti- -v cally installed in accordancewith Figure 2, the

In operation, the ventilatingstructure is easily Y' installed in a conventional ceiling structure. The centrifugal fan unit i6 operates with .positive force and drives a large volume of air througha relatively small duct, whichY can not be accom-` fank unit isjshut down. I prefer to incorporate "in all'units so plished with the general typeof bladeians, Ysuch fans requiring relatively large ,ducts todeliver thej exhaust air to the atn'losph'ere. v For that reaSOmthefdeIiVeryduct and the outside'shutter,

typesofunits ,Y ,i The motor 33v may-be electrically. connected 1 as wellasatheinside shutter, maybeof relatively small sizes, which greatly., reduces the heat transfer areas.- f

`Both shutters are automatic,y andtheV shutters areasp, balanced asto close againstjamb sur.-

faces, `thusv eliminating,objectionable closures wherein shutters'operate'between the sides of a` pipe or lvopening, thelatter constructionsY reduiring such loose fitting as to' permit draft iand cold air toV rushback'into the room. lThe vair under pressure from the fan unit opens the shut- Yters to fixed points where they exert *the least resistance against the ilow ofv thev exhaust` air, Thusv Iv provide a' draitfproofr shutter structure,v which Works Vautomatically withgthe operation of the fan and offers,r very' little. resistanceto lthe ireeair,flovv'fronrthefan;V

rI'he -fan housing `28is shaped ingsuch a manner kthatthe `centrifugal action ofl theblower draws the air ,in through'th'e grill coveredopening and'v distributes the air .against-the curved sides of y the fan housing. Because of the'back -or air# deflectingj'plate 32 Whichis flat and "locatedfin fajplane normal `to the axis of thear inletopening;V I 8I 'and intersecting the air outlet i opening Y Y22, `the air'ais forced upwardalong theI curved 'sidesCofthe housing and :over the back plate andthen through the shutteropening and to the duct 2 for passage-to the atmosphere. 'The curved contour of the fan housing provides a silent low of the air with greatly increased om# cienoy;A While a large ,amount koithe-exhaust airgoes out' directly lthrough the shutter open.-

55. One vend of the lever is provided with a' Y Weight 8 8 and its other end is pivotally connected with a rigid link rpivotally connected at 92 -vvith the shutter 5. When the-unit` iii is installedfin accordance withFiguresv la'nd Ll, the

weight 88 operates to close thefshutter when the the weight closing structure of Figures 5 and 6 either horizontally or vertically, thereby eliminating the necessity of with Wires in a conduitA leading to an outlet box 9'6 provided With'avconventiona'l switch y98.

Without further elaboration, 'the foregoing uwill y Y so fully illustrate my invention, ythat others may,

byI applying current knowledge, l readily adapt the same for ruse under' .various conditions of service.,. f Y, f-

A I claim: f

1.V A .ventilator wallsv-th'ereof, the Aplate-being at and located in-a planefnormalvtoithe axis of the air `inlet` opening .and vintersecting-the air voutlet opening,

anelectric. motor extending' partly through the opening in theV platewith'its'shaft in alignment with the axis .of the air inlet opening, a substantially-semispherical;shel1:fiXed:to the shaft with itslopensidefacingthe;;p1ate,and lblades ex-j tendingradiallyfromV the shell, the upper edges 1 of theshelland vloladesqloeing closefto thesplate.A

2. Aventilator comprisingahousing having an A air inlet-opening andanfairoutlet opening, a fan Within the housing, a -motor'for driving the fan; y

a shutter for theoutletggopening hinged 'at one side of `said,openir 1g,;a weight xed to theshutter near thehinged edge, thereofV for holding theshutter closed when `the fan is atjrest and thehousing isdn a horizontal position, alever ing Without passing over` the loackplatey 32;`the l back plate does insureagainst recirculation'of the air through the tendency of thelblow'er'to 'draw-air fromthe rear side.

Figure `2 Aillustrates .the unit Il! mounted ver` tically in the wall vT5. VIn suchan installation,

l the Weather'hood 18 is connected withvthe neck 22` through: the medium-` of a; short conduit Bil.

, The weather hood- 78 is provided witha shutter pivoted between' itsends yWithin the housing'at ,the opposite side of the air outlet opening and provided at oneendwith a weight, and a member pvotally connected -tothe other end of the lever Y Y and tothe Shutternearthe free vedge of the latter, the Weighted lever being adapted topholdthe shutter closed when the housing is inavertical position with the air inlet opening facing"r that the latter may be installed manufacturing two speciiicv comprising a .housir'iigv khaving' an air inletfopeningin its bottom wall and an air outlet opening .in its side-wall, an air deflecting plate having acentr'alopening and securedv within the-housingbetween the top and bottom

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