US1650122A - Vacuum pan - Google Patents

Description

A. GRANTZDREFER VACUUM PAN Filed DBG. 30. 1926 b v v Patented Nov. 22, 1927.

UNITED STATES .AUGUST GRNTZDBFFEB, OF MAGDEBURG, GERMANY.

vAcUUnr PAN.

Application led December 30, 1926, Serial No. 158,029, and in Germany September 18, 1925.

creased at these parts of the heating surfaces Where the flow of the liquid is directed upwardly, as compared to other parts where the flow is directed downwardly. Thus the upward movement of the liquid is accelers l5 ated by increased heating, while the retar- Ldation of the liquid flowing downwardly is reduced.

For the purpose of explaining the invention an example embodying the same has been shown in the accompanying drawing in which the saine letters of reference have been used in all the views to indicate corre-v sponding parts. In said drawing,

Fig. 1, is a sectional elevation showing a vacuum pan,

Fig. 2, is a sectional elevation showing a radiator element on an enlarged scale,

Fig. 3, is a sectional plan view taken on the line 3-3 of Fig. 2, and

Fig. 4, is a sectional elevation showing a part of a radiator composed of a plurality of radiator elements.

In describing the invention reference will be made to a vacuum pan described in the patent of the United States No. 953,607

granted to me March 29, 1910, which vacuum pan however has been equipped with my improved radiator.

As shown in 1, the vacuum pan con- 4U sists of a cylindrical vessel c' provided with a supply j and a discharge 7c for the juice, and with a vapor eduction pipe l. The radiator consists of a plurality of annular e1`ements m concentrically located one within -the other.

My invention relates more particularly to the construction of the radiator, -and in describing the invention I .shall at first make reference to the example shown 1n Figs. 2

and 3. It may be assumed that only a sinple radiator element such as is shown in Figs. 2 and 3 is used in the vacuum pan the juice lowing upwardly at the outside of the said element and downwardly at the inner side thereof. As shown the radiator a is annular in form. Internally of the radiator there is a vertical cylindrical partition wall b which is fixed to the bottom of the radiator and extends to a point away from the top thereof, thus providing anrannular passage o through which the outer and inner chambers e and f of the radiator communicate 'with each other. v The heating medium such as steam is admitted through a pipe d to the bottom part of the outer chamber e, and the water of condensation is discharged from the bottom part ofthe inner chamber f through a pipe g, the pipes d and g being located at diametrically opposite parts. Thus the heating medium flows upwardly through the outer annular chamber c, and downwardly through the inner chamber f, and the outer wall of the radiator is intensely heated while the heating of the inner wall is comparatively small. Therefore the flow of the liquid to be heated moving upwardly in contact with the outer wall of the radiator is assisted by the heat transmitted thereto, while the retardation of the flow of the liquid moving downwardly in contact with the inner wall of the radiator is comparatively small by reason of the reduced transmission of heat from the inner wall of the radiator.

Preferably a few openings or drainage ports o are provided at the bottom part of the partition b to permit the water con A densed within the chamber e to flow directly t0 the discharge pipe g. y

In cases where the liquid flows upwardly through the radiator and downwardly past the outside thereof the heating medium is admitted through the pipe g, while the water of condensation is removed through the pipe d.

In Fig. 4 I have shown a plurality of concentric annular radiators a provided with partitions b dividing the radiators into chambers e and f communicating with each other through annular passages c, the construction of the elements being the same as has been described with reference to Figs. 2 and 3. As shown in the said ligure, the inlet pipesa1 and the discharge pipes g1 communicate respectively with adjacent chambers of successive radiators, so that in adjacent chambers of successive radiator elements the direction of the flow of the heating medium is the same, the direction of the flow 4of the heating medium being indicated by arrows Therefore the upward flow of the liquid between the first and the second element taken from the right in Fig. 4 isL accelerated by the heat. transmitted to thel liquid from both sides.' The flowof the liquid to be heated is indicated by arrows y.

lVhile in ldescribinglr the invention refer ence has been made to particular examples embodying the same I wish it to be understod that my invention is not limited to the form of the radiatorsl shown in the drawing, nor is it limited inr other respects except as indicated in thetappended claims..`

` I claim: p

1. A vaeuum pan having therein a hollow annular radiator, a I- iartition extending upward from the bottom ot'l the radiator and dividing Vit into inner and outer annular,

chamber-SQ means for admitting aI heating.,r medium into one ot'the annular ehan'ibers,

a passage at the top ofthe partition for aol-l nuttingr the heatingr medium-to fthe other chamber, and a port leading' out ofthe lastnamed chamber at the bottom of4 the same.

2. A vacuum pan havin;r therein a Series of concentric hollow annular radiators, partitions extendingr upward from the bottom ofthe radiators and terminating short of they upperl ends of the same to provide annular chambers `eparated by the partitions Whereb v a heatingl medium admitted to one cha1nber passes ore'r the partition and `heats the other chamber to a lesser degree than the lli-St. an inlet port at one Side ot' each partaition and an outlet port at the other side, the arrangement of parts being such as to bring two 'highly heated chambers into juxtaposition between two less' highly heated cham-v.

chamber. and a port leading ont of the lastnamed chamber at the bottom of the same. In tetnnony whereof I havehereunt() Set; my hand.

AUGUSTGRNTZDRFFER.

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