US1773249A - Condenser - Google Patents

Description

Aug' 19, l930 H. M. YEAGER 1,773,249

CONDENSER Filed Aug. 21. 1928 4 Sheets-Sheet l HIMMMMMHF 'l' Si? I l l l l l l l l l'l'! rl Aug' 19, 1930- H. M. YEAGER 1,773,249

CONDENSER Filed Aug. 21, 1928 4 Sheets-Sheet 2 Aug. 19, 1930. H. M. YEAGER CONDENSEF Filed Aug. 2] 1928 4 Sheets-Sheet MllEiv il: 5Mil= Aug. 19, 1930. H. M. YEAGER CONDENSER Filed Aug.'21, 192e 4 sheets-sheet Patented Aug. 19, 1930 UNITED STATES PATENT OFFICE HENRY M. YEAGER, F BUFFALO, NEW YORK, ASSIGNOR TO FEDDEBB MANUFACTUR- IG COMPANY, INC., OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK CONDENSER Application med August 21, 192B. Serial No. 301,070.

This invention relates to a condenser which is more particularly designed for use in dof mestic refrigerating apparatus for condensing the vaporized refrigerant after the same has been expanded by the heat in the spaces to be cooled so that this refrigerant can be again used in liquid form for continuing the refrigerating operation.

Condensers for this purpose usually 1nclude a coil of serpentine form upon which a plurality of radiating fins are mounted so as to increase the radiation of heat in the vapors or gases to the atmosphere and hasten the operation of liquefying the gas. In order to reduce the joints in the coil as much as possible and thereby minimize the liability of leakage o'f the refrigerant therefrom 1t has been proposed to make the coil of one continuous piece of tubing which is bent anddoes not employ any couplings at the turns. Such construction of the coil has heretofore not permitted of economically mounting radiating fins or strips thereon by slipping the fins lengthwise on the several convolutions of the coil because these fins can not readily pass around the turns or bends of 'the same, thereby not only increasing the cost of manufacture but also reducing the eiiiciency of the condenser.

It is the object of this invention to provide a condenser in which the coil is continuous and the bends or turns connecting the several convolutions are of the same diameter or cross section as the main sections or stretches of the coil and which is provided with radiating fins or strips so constructed that the same can be slipped over the bends and onto the main sections or stretches of the coil easily, quickly and economically and provide a condenser which is strong and durable and furnishes the maximum condensing etliciency.

In the accompanying drawings:

Fig. 1 is a side elevation of a condenser embodying my invention and showing the same organized `for producing a single pass of the refrigerant.

Fig. 2 is a vertical cross section of the same taken on line 2 2, Fig. 1.

Fig. 3 is a fragmentary side elevation 011l an enlarged scale, of the condenser correspendingy to Fig. 1 but showin the last radiating n in the form in whic it is slipped simultaneously over a plurality of bends and upon a plurality of main stretches of the coil.

Fig. 4 is a vertical cross section taken on line 4 4, Fig. 3.

Fig. 5 is a horizontal section taken on line 5 5, Fig. 3.

Fig. 6 is ar fragmentary perspective view of the condenser shown in Flgs. 1-5.

Fig. 7 .is an elevation of a modified form of radiating fin or strip embodying my mprovement.

Fig. 8 is a side elevation showing a con-- denser made in accordance with my invention, but having two passes of the coils.

Fig. 9 is a vertical cross section taken on line 9 9, Fig. 8. y

Fig. 10 is a condenser organized according to my improvement and containing three passes.

l Fig. 11 is a vertical cross section, taken on line 11 11, Fig. 10.

In the following description similar characters of reference indicate like parts in the several figures of the drawin s.

Referring to Figures 1-6, t e numeral 20 represents the parallel main stretches or sections and 2l the turns or bends which alternately connect the corresponding ends of the stretches thereby forming a coil. This coil is made continuousl from a single piece of metal tubing or plping of uniform diameter or cross section to produce a coil having a plurality of convolutions which are folded relatively to one another.

The material to be condensed may be conducted into one end of this coil in any suitable manner and the condensate discharged from the opposite end thereof is delivered to any desired place.

Upon the stretches of this coil are mounted radiating means consisting preferabl of a plurality of sheet metal iins 22, each aving i the form of a. strip and provided with a plurality of transverse corrugations A23, 24 arranged alternately on opposite sides of the for the reception of a pair of adjacent coil stretches and for permitting this lin to be passed over the turn connecting the corres nding ends of said stretches. Each of tllgse slots, as shown in Figs. 1-6 may be formed by punching two spaced holes 26 in adjacent parts of the fin and slitting the metal from one of these holes to the other, as shown at 27 in Figs. 2 and 6, thereby forming two wings 28 on the fin between the opposing 1nner sides of the companion holes 26 which normally are arranged in line or in the same plane and face each other. The wings of each of these pair of holes are now turned to one side, as shown in Figs. 3, 4, and 5 so that the two holes communicate with each other and in effect form a slot, as shown in the upper art of Fi 4,

e coil am? the fins can now be assembled by slipping each fin or strip with its several slots over the turns or bends of the coll at one end thereof and then slipping this fin over the corresponding air of coil stretches. yThe distance between t e centers of each pair of holes is the same as the distance between the centers of the respective pair of coil stretches whereby the opposite end portions of each of these slots iit snugly around the outer halves of the respective pair of coil stretches. After each iin or strip has been thus simultaneously slipped upon a plurality of pairs of coll stretches in this manner the wings 28 on the central parts of the longitudinal edges of each slot are again bent back into allnement so that they face each other and engage wlth the inner halves of the opposing inner sldes of the companion coil stretches. v

By this means each coil stretch 1s engaged by each fin around its entire perlphery whereby a maximum contact is formed between the coil and the fins and a highest efliciency is obtained in transferring heat from the refrigerant to the atmosphere.

The metallic contact between the coil and the fins is further increased to hold these members in place relatively to each other and also to improve the heat transference by soldering or welding the fins on the coil stretches.

When placing the fins on the coil the corrugations of the several fins or strips engage each other and these operate as spaces which form passages for the air between the ins and coil.

' each slot left open,

These corrugations which are arranged beytween adjacent slots extend entirely across the respective strip, as shown 'at 23, but those corrugations in line with the slots are yformed in sections arranged on opposite sides of each of these slots, as shown at 24, in Figs. 2, 4), and 6.

If it is desired to reduce the cost of manufacture the wings 28 may be omitted and as shown at 29 in Fig. 7 but this construction sacrifices some of the in the formation of contact between the fins and the coil stretches.

In the construction shown in Figs. 1-6 the several convolutions of a gle pipe or tube arranged in the same lane so that a condenser is produced havlng but a single pass or condensing region.

If a condenser isrequired having two passes or condensing regions a single continuous pi e or tube is bent, as shown in Fi s. 8 an 9, to form two vertical tiers of coi stretches 30, 31, and each stretch of one tier is connected with the corresponding enc'. of a stretch in the other tier by a turn or bend 32 which inclines, so that the iiuid will readily flow from one convolution of the coil to another. In this construction the\ radiating fins or strips are made similar to those in Figs. 1-6, exce ting that the coil receivin slots are incline instead of being vertical, and all of the corrugations 33 are of sectional form instead of some being sectional and others complete.

When a condenser of larger capacity is required the number of asses may be further increased. For examp e, in Figs. 10 and 11 is shown a-construction in which three coils are arran d to form three vertical tiers of coil stretc es 34, 35, 36, which are s aced laterally from each other and the stretc es or convolutions of the several coilsbeing also staggered relatively to each other.

Each coil in thls particularl constructionv is assembled with the radiating fins or strips 37 in the manner described with reference to the single pass condenser shown in Figs. 1-6 and the same reference characters are therefore a plied to corresponding parts.

In t s triple ass condenser it is preferable to connect t e corresponding inlet ends of the several coils by a single 1nlet header or manifold 38 and the corresponding outlet ends of these coils by a single outlet header or manifold 39.

, Each of the forms of my invention pos-l sesses the advantage of simplicity of construction and manufacture, maximum condensing eilcienc and absence of leakage inasmuch as the fins are fitted tightly, ex ditiously and economically to continuous tubing or piping.

I claim as my invention: 1. A condenser comprising a coil having a plurality of convolutions forming main stretches and turns connecting corresponding ends of said stretches, and fins mounted on said stretches and each provided with a plurality of slots, each turn of the coil p :s through one of said slots and opposite enz of each slot engaging with the outer side of adjacent stretc es o the coil each of said being provided between the ends of each of its slots with wings which are displaced the respective slot and which are bent into line with each other and coils` ma e of.

into engagement with the opposing inner sides of the respective main stretches after the fin has been passed over the same.

2. A condenser comprising a coil having a plurality of convolutions forming main stretches and turns connecting corresponding ends of said stretches, and iins mounted on said stretches and each provided with a plurality of slots, each turn'of the coil passsignature.

HENRY M. YEAGER.

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