US1401717A - Heat-exchange device - Google Patents

Description

F. A. HALLECK.

HEAT EXCHANGE DEVICE.

APPLICATION FILED NOV. 28. 1917.

Patented D600 27, 1921.

2 SHEETS-SHEET l.

Patented: Dec. 27, 1921.

2 SHEEIS-QSHEE I 2- & N

F. A. HALLECK HEAT EXCHANGE DEVICE,

OO O O O On O OO O OO 0 APPLICATION FILED NOV; 28,1917.

ooooooooooooooo .llll'lll'lllll'I OOOOOOOOOOOOOOO 0000 0000 0000 OOOOOOOOOOOOOOO OOOOOOOOOOOOOOO 0000 0000 0000 0000 0000 0000 OOOOOOOOOOOOOOO FRANK A. time, or can PARK, rumors, ASSIGN'OR TO- suLLivAN' mncn'mmy comm, A. conrona'rron or mnssacnusnr'rs.

'r-E'xcHAN'GE DEVICE Specification of Letters Patent. Patented D643. 27, 1921.

Application filed November 28, 1917. Serial'fio. 204,459.

Illinois, have invented certain new and usefnl Improvements in Heat-Exchange 'De-- vices, of which the following is a full, clear,

' which-is adapted to be driven from any suitand exact specification.

My invention relates to heat exchange devices, and more particularly to intercoolers for compressors.

It has for its object to cool the air used in a multi-stage compressor in an improved manner; A further object of my invention is to provide an intercooler having an improved construction and arrangement of air and cooling fluid passages whereby the cooling effect and the resultant efficiency of such a compressor is materially increased. A still further object of my invention is to provide an intercooler of improved and simplified construction wherein the cooling effect is greatly augmented, the air being brought into contactwith the cooling elements during its passage throughout a materially extended path, and the cooling elements themselves being of an improved construction whereby a greatly increased cooling surface is'rendered available. These and other ob jects and advantages of my improvement will, however, hereinafter more .fully appear.

In the accompanying drawings, I have shown for purposes of illustration one embodiment which y invention may assume in practice, illustratingthe same as applied to use in connection with a well known type of compressor known as the an le compound, although itwill be understoo that my mvention is notlimited to use in conjunction I I and 15 are adapted to communicate, the

therewith.

In these drawings,- I Figure 1 is aside elevation showing such a compressor equipped 'with my improvement the intercooler casing being broken awa to facilitate illustration,

Fig. 2 is a detail'end elevation of the intercooling units;

In this illustrative construction, it will be observed that I have shown a compressor of the angle compound type comprising a base 1 having suitable cylinders 2 and 3 disposed at r1ght angles to one another, suitable pistons 4 and 5 being movable in these cylinders and connected to the usual crank shaft 6 able source and, as is customary, is provided with a flywheel 7 As in the usual angle compound construction, the intercooler is located between the cylinders '2 and 3 in such a manner as to receive the air from the low pressure cylinder 2 and deliver the same to the high pressure cylinder 3 after the same has been cooled during its passage through the intercooler. In the construction illustrated,'the intercooler casing is indicated at 8 as suitably supported on the base 1 and connected through a suitable connection 9 forming its air inlet, to the low pressure cylinder 2, and also connected through a suitable passage 10 forming its 311" gischarge, to the high pressure cylin- In my improved construction, it will be observed that the intercooler casing 8 is substantiallyrectangular in cross section and enlarged, in such a manner as materially to increase the area available, at the same time that it is still possible to'accommodate the intercooler compactly within the outlines between its top and bottom, two of the same being herein shown at 11 and 12, whichare adapted to divide the-intercooler easing into a plurality of compartments 13, 14, and 15. As illustrated, these compartments 13, 14

10 through a suitable openingor' port 19. It

will also be observed that these several openings are arranged in staggered relationat opposite ends of the casin 8 in such a manner as to enable a fiow 0 air from the low pressure cylinder to. pass up into one end of the compartment 15, and longitudinally thereof up through the opening 17 into the opposite end of the compartment l l, longitudinally of that compartment to the other end thereof, up through the opening 18 into the compartment 13, and longitudinally of that compartment to the outward opening 19 leading to the discharge. 1 There are thus provided a plurality of parallel passes in series for the air to be cooled. Attention is also directed to the fact that in my improved construction one end 20 of the casing 8 acts to permanently close one end of each of these compartments, while the other endsof the same are adapted to be closed by the cooling units hereinafter described.

These units, as illustrated in Fig. 4, each comprise a series or bundle of small, longitudinally disposed, spaced tubes or pipes 21' so arranged as to permit access of the air to practically their entire. area and also to permit the flow of the cooling medium from one end of each unit down through certain pipes thereof and back through other pipes to an outlet point located adjacent its inlet.

More specifically, each of these units is shown to be provided with an end plate 22 perforated at 23 to permit fluid flow through the pipes and adapted to be attached over and close the open end of its compartment 13, 14, or 15 when the unit is disposed 1ongitudinally in the same. At its opposite end, each of these units is also provided with a smaller end member or header 24: adapted to be slipped into a compartment and likewise provided with suitable openings 25 adapted to receive the pipes, this member 24, however, also being provided with a passage 26 to enable the cooling medium to pass out of one set of pipes and guide and direct it into the other set for its reverse flow. In a preferred form, these the several pipes 21 as,

members 22 and 24 are each connected to for example, by slightly expanding the ends of the latter as is usual in ordinary boiler practice. As shown, the several pipes are also spaced apart and connected to the member 22 through a series of threaded longitudinally extending bolts 27 operatively connected to a plurality of transversely disposed bathe plates 28, perforated to permit the free passage of the pipes and the free longitudinal expansion and contraction thereof. As shown, these plates 28 are spaced apart b short lengths of spacing pipes 29, surroun ing the bolts 27, and are clamped in position by nuts 30 on their ends, the same being disposed in staggered relation at different points along the length of the pipes 21 in such a manner as to cause the air passing from one end to the other of each compartment to take a circuitous path, alternately traveling over and under the dillerent batanemia fies as it passesfrom the inlet or the compartment to the outlet thereof. Cooperating with these baffles, it will also be observed the cooling medium is passed longitudinally in opposite directions through each compartment, finding an outlet at a point adjacent its inlet, while the air to be cooled passes in a circuitous path through each compartment in such a manner that it is brought intocontact throughout an exceedinglylong path with practically every inch of cooling area, and thus is effectually cooled.

In order to supply the cooling medium to the difierent pipes 21 of the several units and to enable the same to flow continuously from one set of pipes to the other and through the machine, it will be observed that l have provided a pipe 32 extending from the water jacket 33 of the low pressure cylinder up nearly to the level of'the top of the compartment 13 and at a point adjacent the air inlet end thereof. There, it will be observed that this pipe 32 communicates by means of a longitudinally extending assageway 34- with an upper chamber 3% in a removable chambered cover plate 35 disposed over the open end oithe intercooler and inclosing the end lates 22 of the several cooling units. As illustrated, this plate 35 is provided with a plurality of spaced, horizontally disposed ribs 36 adapted to engage each ofthe plates 22 at a point intermediate its ends. Thus, it will be observed that when the cover 35 is clamped in position by suitable means, such as the clamping bolts 37, each unit is held securely in place and the cooling fluid therefor is automatically divided in such a manner that a continuous flow may be obtained through the unit. As illustrated, these ribs 36 also act to form a plurality of intermediate larger chambers 38 and another smaller chamber 39, corresponding to the chamber at. This chamber 39, as shown. in turn communicates by means of a passageway 39 with a discharge pipe 40 leading to the water jacket 41 of the high pressure cylinder.

In the operation of my improved construction, it will be observed that the air from the low pressure cylinder is caused to pass into and longitudinally of the compartment 15 into the opposite end of the compartment 14, through that compartment,

and into the opposite end of the compartment'13, through which it passes longitudinally to the opening 19 leading to the high pressure cylinder. During this travel of the air, it will also be observed that the same is caused to passaround the several baffle plates 28 and 31 in such a manner as to bring the same in contact with each of the several cooling pipes 21 substantially throughout its length. It will also be observed that the cooling fluid enters the intercooler at such a point that the same when coldest is brought into contact with the air when the latter has practically reached its minimum' temperature, andthat thereafter the gradually warming water is passed reversely along the stream of gradually cooling air, finding an outlet at the point where the air is warmest. Thus, it will be noted that the maximum cooling effect is obtainable, since, as the water even when it leaves the intercooler is'always cooler than the air entering the latter, it is enabled to act effectively as a cooling agent at all points throughout its passage through the intercooler.

21 of relatively small cross section, it is possible to multiply the streams of water passing through the intercooler and thus increase the cooling area available,. and that without in any way interfering with the flow bf air therethrough.

As a result of my improvement it.has been found that not only is the temperature of the air entering the high pressure cylinder materially reduced, but that as a result the efliciency of the compressorv has been materially increased. By the use of my improved construction, wherein the cool1ng elements are divided into units, it

' will. alsolbenoted that it is possible for the same to be very readily assembled or removed when desired, any iinit being readily withdrawn whenever the cover plate 35 is detached. Obviously, the different meme bers going to make up each'of these units may also be very readily assembled and cheaply manufactured, so thatat the same time that it is possible to increase the capacity for a compressor of a given size, it is also possible to maintain a relatively low manufacturing cost; These and other ad'- vantages. of my improvement will, however, be clearly apparent to those skilled in the art.'

While I have in this application specifically described one embodiment which my invention may assume in practice, it will be understood that the invention is not limited It will also be observed that through the use of a large number of pipes ing 1. An intercooler comprising a casing having parallel superimposed communica ing compartments, each of which compartments is closed at one end and a co'oling unit carried in each of said compartments thereof.

2. An intercooler comprising a casing and projecting the-reinto from the open end having parallel superimposed compartments communicating with one another at their opposite ends, and a removable'cooling unit carried in each of said compartments and providing for a circulation of cooling medium in opposite directions therein.

3. An intercooler comprising a casing having a closed end'and a seriesof superimposed open .ended communicating compartments, and a cooling unit carried in each compartment and closing the end thereof.

4. An intercoolencomprising a j casing having a plurality ofsuperimposed communicating compartments, and means for directing a cooling medium in opposite directions to each of said compartm-ents, said means comprising a plurality of removable cooling units.

5. An intercooler comprising a casing having a closed end and a series of superimposed open ended communicating compartments, a cooling unit carried in each compartment and closing the" end thereof,

and means for directing a cooling medium consecutively through said units. 7

6. An int-ercooler, a casing comprising a plurality of parallel .communicating air compartments, and means for cooling the air thereincomprising means for providing a series of finely divided .cooling streams passing consecutively through said com -v partments including a plurality of separately removable cooling units disposed one in each compartment.

7. An intercooler comprising a casing of substantially rectangular cross section and having a plurality of parallel communicatcompartments formed therein, and a plurality of cooling units disposed in saidcompartments, each comprising a series of spaced cooling tubes cooperating to form a unit of substantially rectangular cross section substantially filling its compartment and each removable without removal of any other.

8. An in'tercooler comprising a casing having a closed end, transverse longitudinally extending ported partitions therein forming a series of passes connected with its il s

each other alternately at opposite ends, and a series of, cooling units, one in each pass,

comprising closure plates for-the ends of said compartments, cooling fluid vtubes 'secured in said closure plates, and headers slidably mounted in said compartments.

"9. An intercooler comprising 'a casing having "a closed end, transverse longitudi nally K extending ported partitions therein 11oforming 'afseries of passes-connected with each other alternately at opposite ends and a series of coolingvnnits, one in each pass comprising closure plates for the ends of said compartments, cooling fluid tubes secured in said; closure plates and headers slidab-ly mounted in saidcompartments, and a cover plate for the end of said intercooler opposite 'inlet thereto, and separate cooling units in each of said compartments,

units beingarranged in series.

11, An intercooler comprising a casing having a closed end, longitudinally extending partitions in said casing dividing the same into a plurality of parallel compartments, said partitions being provided with I middle portions thereof.

said cooling snows? openings adjacent the opposite ends, of said casing, said openings being disposed at opposits, ends of adjacent partitions, cooling units located in each of said: compartments,

cooling units comprising plates closing said the open ends of said compartments, tubes secured in said plates andheaders with.

which said tubes oommunicate at their'opposite ends, and a front plate for said casing havin partition-ribs formed thereon, saidribs a utting said end plates'adjacent the 12. An intercooler comprising a casing having a closed end, said casing being divided into a plurality of parallel, serially arranged, counicating, open ended compartments by longitudinally extended, ported-partition member, cooling units disposed in each of said compartments and each comprising a header freely slidable 'in its respective compartment, a series of tubes communicating with said header, and a closure plate in which said tubes are mounted at their opposite ends, said closure plate serving to close the open end of said compartment, and baflles arranged in staggered relationwith respect tosaidcooling tubes and held in fixed relation with respect to said closure plate, and a cover plate at the end of said intercooler casing. opposite said closed end, said cover plate having transversely extending partitions formed thereon dividing the same into a series of comp-artmerits, said partitions being disposed adjacent the median lines of said closure plates whereby a reverse flow occurs in each cooling unit and a serial flow through the series thereof. a

In testimony whereof I affix, my signature. I FRANK A. HALLECK;

Images