US1728204A - Double-flow fan - Google Patents

Description

Sept. 17, 1929. FALLA 1,728,204

DOUBLE FLOW FAN Filed Nov. 29. 1927 4 Sheets-Sheet Sept. 17, 1929.

DOUBLE FLOW FAN A Filed Npv. 29. 1927 4 Sheefs-She'et 2 F. FALTLA 1,728,264

Sept. 17, 1929. FALLA 1,728,204

DOUBLE FLOW FAN Filed Nov. 29. 1927 4 Sheets-Sheet 3 I Sept. 17, 1929.

F. FALLA 1,728,204

DOUBLE FLOW FANv Filed Nov. 29. 1927 4 Sheets-Sheet 4 Patented Sept. 17, 1929 PATENT OFFICE FERNANDO FALLA, OF MAPLEWOOD, NEW JERSEY, ASSIGNOR OF ONE-HALF TO EDGE HOUR IRON COMPANY, OF EDGE. M003, DELAWARE, A CORPORATION OF DELA- WARE DOUBLE-FLOW FAN Application filed November 29, 1927. Serial No. 236,406.

My invention relates to power driven fans and has for its object to provide in one structure in efiect two fans, each adapted to handle a separate current of gas and made up of two sets of chutes. crossing each other in the structure of the fan and having common Walls through which the heat of p a heated gas current can be transmitted to a colder gas current passing through the other set'of chutes. The nature of my improvement and the best way which I have devised for the construction of my improved fan will be best understood as described in connection with the drawings which illustrate a fan embodying my invention and in which- Figure 1 is a vertical sectional view taken through the center of the fan and through its housing; the view is taken as on the section line 1"1 of Figure 2.

Figure 2 is a front view of the fan.

Figure 3, a plan view.

Figure 4, a sectional view taken on .the section line 4.-4.-' of Fig. 2, and

Figures 5, 6, 7, and 8, are perspective views showing details of construction.

A is the housing of the fan comprising the inlet chambers A and A communicating through openings at and a with a fan chamber, having delivery chambers A and A, communicating respectively with outlet conduits a and a. B, B, are pedestals support-" ing the driving shaft B to which is attached the hub C of the fan, which hub, as shown, is provided with projecting ledges C and C extending laterally in opposite directions. Secured to these ledges are the back plates of the chutes, indicated at D and D The front plates of the fan chutes are made up of the plates E and E which, as shown,

and as convenientl constructed, are made up' of tongues of a isk E, the tongues being bent alternately into opposite curves and secured at their ends to rings indicated at E and E. F, F, etc., indicate the side plates of the chutes which are secured to the edges of the front and rear plates, as shown, formin common partitions between the alternate c utes, one side of which-is indicated at G and the other at G", In'

order to increase the heat conductivity of the partitions or of such partitions as are common to the two chutes which they separate, I prefer to form on the partition plates ribs indicated at 7 which should, of course, be disposed in the flow lines of the gases passing through the chutes so as to offer as little frictional resistance as possible to the flow of the gases.

It will be obvious that my construction co not only provides in effect two independent fans in a single structure but also provides, by reason of its embodiment of the two sets of fan chutes crossing each other and having common partition plates with a very efiicient transfer of heat from a current of hot to a current of cold gas. The relative capacity of the two sets of chutes should, of course, be made to conform to the volume of the current of gas passing through them.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A double flow fan having two sets of impeller chutes, the individual chutes of each set alternating with chutes of the other set, each set of chutes having entrance and delivery openings on opposite sides of the fan so that alternate chutes of the two sets cross each other laterally, said alternate chutes having common partition walls, said fan having separate supply and delivery chambers for each set of chutes.

2. A double flow fan havin the features of claim 1, and having in com ination with the common partition walls ribs extending from said walls into the chutes disposed to conform with the flow lines through said chutes.

3. A double flow fan having the features 90 of claim 1, in which the chutes are made up of curved rear plates secured to the hub of the .fan and extending alternately in opposite directions, partition plates secured to the edges of the said rear lates and curved 95 front plates secured to said partition plates.

FERNANDO FALLA.

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