US2241108A - Air flow control - Google Patents

Description

6. AKERs.

AIR FLOW CONTROL 7 Filed March 22, 1940 2 Sheets-Sheet 1 EIEIDDDDD PatentedMay 1941' a mary purpose'of the-"invention is'to providefa'con- Ybimetal strip I'l being one form that may be trol sensitive to and operated by differences in employed. In this form, the outer end of the biroom temperatures to. contr 1 the flow of air metal i1 is anchored to a post I8 fixed to the invention will become apparent to those, versed made and the lever s6 proportioned as to lengths throughout. the several views in the drawings. In order to accomplish this result, the cover *slight passageway for admittance of air there- Then-a window 26 of suitable size is provided FLOW CONTROL Application ltfarch 22, 1940, Serial No. 325301 4Claims. (crass-ion This invention relates to means for controlling 'control'member that 'issensitive. to temperature the flow; of air in response to temperature changes. in that it will change'formsubstanchanges such as in a duct leading from some heat tially with but slight' changes in temperature. source such as -'a radiator or 'a-hot air furnace. Any suitable type of thermostatic control may and the like or'fromi a cooling element. 'A pri- 5 be employed, the herein shown helically coiled into that room in accordance with those temperapartition 20 and has its inner end connected to ture changes. vA further important object of'the' ,10' a rockable shaft 19.. invention is to provide astructure that will cause 0n the end of the shaft I9 is fixed a iever'2l. thecontrol to respond toqvery small variations- 1 A connecting rod, 22 is rockably secured to the in theroomtemperatures, all without requiring outer end of the lever-2| and drops down to rockelaboratepr extremely delicate mechanisms. "ably engage a lever 23 -which in turn is fix d o These and other objects and advantages ofthe the damper shaft 1 IS, 'The connections are so in the art .in the following descriptioif of 1 one that'the damper l2 will berocked from-open to particular form of the invention as illustrated closed positions as the bimetalmember l1 may more or less diagrammaticallylin theaccompanyexpand. I v ing'drawings, inwhich I a a Since the heat-sensitive member l|- -;is mount- 5 "Fig. 1 is a front elevation of a structureemed in'the chamber in the end of the box II and .is, bodying the invention; I i thoroughly insulated and removed from in-. Fig. 2, a transverse section onthe line 2- 2 in finance of the temperature of mean flowing up Fig. 1; and f 7 l into and out ofthe box ll, means must be pro- Fig. 3, a vertical section on the line 3-3 in 25 i ed t m ke th s ember 1 sp ns ve to Fig. 1. the room temperature in general into which the Like characters or referenceindicate like parts 7 air discharg from the box I I.

The usual air conductor or pipe I8 is herein grille 24 is confined to the opening of the box shown as leading up to a header or outlet box II, and the end chamber in whichthe member ll, herein shown as mountedwithin a partition I] is mounted is covered over by a solid cover wall to open through one side of the wall. A so that this control chamber is'closed to-- the cut-of! damper l2 in the nature of a-butterfly room from the front. side. In order to insure valve is mounted to -be rocked by a shaft l3 circulation of the'roomair through this conextending'across the end of the pipe M; It is to trol, chamber to make the member l1 responsive be noted that the damper I2 is notched out to thereto,-'a collector hood 25 is provided to extend clear an upturned hood ll, Fig. 2, so that at the downwardly and outwardly from the floor of end of the box ll there is always at least a the box H to be open from its underside only.

past regardless of whether or not the damper 40 through the partition wall 15 and theinsulat- I2 is in the open or closed or any of the intering wall IBQ-Fig. 1, with the deflector hood l4 mediate positions. The box H is made. to be thereover open from itstop side only.- It is to v somewhat longer than it would be without my be noted that the collector hood 25 is mounted control and in the present form is made to exto one side of the path of the. discharge air tend to one side beyond the pipe III to have a from the box II and to be below that path, the vertical partition l5 extending transverse therehood 25 extending in' some cases under theacross, preferably well insulated by any suitable discharging air, when a greater circulation is means such as bythe additional insulating required through the thermostat chamber. wall l6. Now since there is alwaysan upward passage In the chamber thus provided in the box H of air to some degree past the end of the damper beyond the partition 15, I provide a second parl2 across the hood I4 and out through the front tition 20 spaced from the first partition if: but grille 24, a flow of air will be induced into the terminating by its top end below the top of the collector hood 25, through the control chamber, box II to leave an air passageway thereover. up across the thermostat l1, over the top of the On the partition 20, I mount a thermostatic partition 20, down to and through the window 26 it is to be seen that upward box, said damper and upwardly fromthe hood It to join with the column of air flowing past that window. Thus the air within. the control chamber does not become entrapped but is moving so as to make the air adjacent the control member I! correspond in temperature to the 1 air of the room being heated. The member I1 is thoroughly removed from influence of the temperature of the air in the box H by the down flowing column of room air between the partitions i5 and 20 in addition to' the heat insulation afiorded by the wall l6 and the partition 20. It is to be kept in mind that in general, there is always a circulation of air.

within the room when air is discharging from the box II and that this circulation takes a general travel and thence down around and back in part of the room back to the underside of the incoming air so that there is in general a cirof the room air toward the collector I1 is so designed a circulation manner across the lower damper l2 accordingly for admission and closing off 01 the hot air flow.

employed without departing from the spirit of theinvention and I, therefore, do not desire to be limited to that precise form beyond the limitations as maybe imposed by the following claims.

I claim:

1. For an air conductor, an outlet box having an intake opening, a damper mounted to swing to control flow of air through said opening into the box, said damper being notched out to allow a limited flow or air past a portion thereof regardless of position of the damper, a control chamber at a side 01' said box adjacent said damper portion,

a damper operating thermostat in said chamber, means operatively connecting said damper and said thermostat for damper operation thereby responsive to temperature changes at the thermostat, means for conducting air into said chamber from a zone to one side 01' said box, an upturned hood at the notch, and a passageway from said chamber discharging through the hood into said box through the notch at said damper through and from said box particularly past said damper portion induces a flow of air through said chamber. V

2. For an air conductor, an outlet box having an intake opening, control flow of air through said opening into the being notched out to allow a limited flow or air past a portion thereof regardless of position of the damper, a control chamber at a side of said box adjacent said damper portion, a damper operating thermostat in said chamber, means operatively connecting said damper and said thermostat for damper operation thereby responsive to temperature portion, whereby flow of air a damper mounted to swing to changes at the thermostat, means for conducting air into said chamber from a from an end thereging passageway be! through said partition and hood. n8

3. For an air conductor, anoutletbox having the chamber inlet conduit.

box to the chamber box opening.

CECIL LYNN AKERs.

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