US1367944A - Heat-interchanging device - Google Patents

Description

LE ROY BROWN, HEAT INTERCHANGING DEVICE. APPLICATION map SEPT.2I, 191a.

Patented Feb. 8, 1921.

UNITED STA'IJE' S PATENT OFFICE.

HEAT-INTERCHANGING DEVICE.

Application filed September 21, 1918.

To all whom it may concern:

Be it known that I, Ln ROY BROWN, of the city of Sault Ste. Marie, in the district of Algoma, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Heat-Interchanging Devices, of which the following is the specification.

My invention relates to improvements in heat interchanging devices and the ob ect of the invention is to devise simple rapid means for either cooling or heating various kinds of fluids whether in the form of a liquid or gas or in a semi-fluid state and it consists essentially of a series of parallel channels through which the fluid to be cooled passes, such channels being separated by intervening spaces through which the cooling medium flows as hereinafter more particularly explained.

Figure 1, is a longitudinal section through my device arranged for cooling or heating fluids passed therethrough under pressure or vacuum.

Fig. 2, is a sectional view on line my Fig. 1.

Fig. 3, is a sectional view on line my' Fig. 1.

Fig. at, is a perspective detail of one of my unit members.

Fig. 5, is a longitudinal sectional view through my cooling device arranged for cooling oil with water where both are at atmospheric pressure.

In the drawings like characters of reference indicate corresponding parts in the various figures.

I will first refer to Figs. 1 to at inclusive.

1 indicates a casing comprising a lower casing member 1*, an intermediate casing member 1 and an upper casing member 1 The lower member 1- is provided with an in let 1 and an outlet 1*. The upper casing member is provided with an inlet 1 and an outlet 1 The intermediate casing member is provided with an inlet 1 and an out} let 1 The liquid to be cooled is fed through the inlets 1 and 1 and passed out from the outlets 1* and 1". The cooling medium passes into the device through the Specification of Letters Patent.

Patented Feb. 8, 1921.

Serial No. 255,126.

inlet 1 and let 1'.

In order to separate the liquid to be heated or cooled from the fluid forming the temperature changing medium I have provided the following device.

Within the upper and lower casing members I and 1 is located the member illustrated in Fig. at. This member comprises a rectangular plate member 2 provided with a series of parallel slots 3 from which depend hollow flanges l extending paral lel one to the other, the side walls of which may be either vertical or slightly inclined so asto taper toward the outer end of the flange as shown in Fig. at. The flange-like portion 2* formed by the edge of the plate 2 extending beyond the depending flanges -l: rests, when inserted in the lower unit 1", upon the top edge of such unit so that the flanges depend into the casing member. hen in this position it will be seen that a plurality of parallel channels are formed extending longitudinally of the casing member 1 between each of the depending flanges t and through which the fluid to be cooled passes as it travels from the inlet 1 to the outlet 1. Upon the flange 2* resting upon the upper edge of the casing member 1 rests an out-turned flange 1 of the central member 1. The flange of the lower casing member 1 and flange 2 and flange 1 are'suitably secured together. The up per edge of the central casing member 1 is provided with an out-turned flange 1 Upon the out-turned flange 1 rests the outturned flange 2 of the upper member 2 and upon the flange 2* of the upper member 2 rests the out-turned flange of the upper casing member 1 These flanges are also suitably connected together. By this means parallel channels are also formed in the upper casing member 1 through which the fluid to be cooled passes as it travels from the inlet .1 to the outlet 1. The cooling medium which passes through the inlet 1 enters the central portion of the device formed by the member 1 and passes into the interior of the hollow flanges 4.

passes out through the out- .It will thus be seen that the fluid to be cooled passes against the outside face of the Walls of the hollow flanges 4 and the cooling fluid passes against the inside face of the walls of the hollow flanges 4 thereby providing for heat transfer, the fluid passing into the interior of the flanges if of lower temperature than the fluid to be cooled serves to lower the temperature of such fluid, the heat transfer being effected through the walls of the flanges 4t. Similarly if it is designed to raise the temperature of the fluid passed to the upper and lower casing members 1* and 1 the fluid pass into the hollowflanges of the lower cooling unit 2. The batfle plate 7 is provided with tongues of a similar nature which extend respectively into the hollow flanges 4 of the upper and lower units 2. Cross plates 9 are also provided extending between the bafiie plate 5 and the end wall of the middle unit casing'l'.

By this means the cooling or heating fluid which is fed through the inlet 1 is distributed by the baffle 7. Part is directed into the upper hollow flanges 4 and part into the lower hollow flanges 4. The remainder passes through slots opposite the inlet. Part of the fluid passes beneath the baffle plate 6, and part above. Convectioncurrents will cause the warmer portion of the cooling medium to rise and the battle 5 is arranged so that only the upper and warmer portion of the cooling medium will find its way through the outlet 1 Inorder to distribute the oil or other fluid to be cooled so thatit passes evenly through the parallel channels formed by the flanges 4 I have provided perforated plates 10 which extend against the ends of the flanges at the inlet end of the temperature interchange unit. At the opposite ends of the flangesI have provided plates 11 which allow the fluid which has either been heated or cooled to the greatest extent to pass off through the outlets 1 and l. lWhenever a fluid that contains a gas in solution or that gives off vapor, is passed through the interior of the hollow flanges, a gas release will be necessary at the top of each hollow flange.

In Fig; 5 I have illustrated my device adapted for cooling fluids which are fed under atmospheric pressure. In the device as arranged in F 5 I only employ the lower casing member modified as illustrated in Fig. l and the flanged member 1 and member 2 modified, the upper member 1 being dispensed with. In the hollow flanged member 2 shown in Fig. 5 the flange like portion 2* is dispensed with and the sides are carried vertically upward'to form an open top box, in the ends of which the inlet andontlet are placed.

13 indicates the inlet through which water-is passed to the interior of the unit.

12 indicates the outlet through which water is discharged. In this figure the outer casing 14 is preferably longer than the member 2 and is provided at the inlet end with a perforated wall A forming a compart ment 14" into which oil is fed from a valve 15 which is controlled by a float 16. The oil is fed into the compartment 14, passes through the perforated wall let and flows longitudinally between the flanges of the member 2. At the opposite end of the easing is a cross wall 14 forming a weir. Between this weir and the end of the unit 2 is a wall 143. This wall battles the warmer fluid which by convection finds its way upward and allows the cooler fluid from the bottom to rise and overflow, the weir passing out through the discharge orifice 17.

From this description it will be seen that I have devised a very simple device whereby a heat interchange may be effected between various fluids, such heat interchange being accomplished rapidly and efficiently. Also it will be seen that I have devised a simple means whereby both'extcrior and intcrior walls of the unit may be quickly ex posed for cleaning purposes.

In certain cases where the fluid is of such a consistency that it has a tendency to cling to the walls of the flanges it may be necessary to employ scrapers. I do not illustrate or describe these in detail as they may be of any suitable construction commonly used in other devices.

lVhat I claim as my invention is:

1. A heat interchanging device comprising a casing having an inlet at one end and an outlet at the opposite end, a member sup ported upon the upper edge of the open top 3 of the casing and provided with a series of parallel depending hollow flanges extending longitudinally of the casing and between which the fluid passes from the inlet to the outlet of the casing, a perforated plate extending over the ends of the flanges at the inlet end, and means for feeding a temperature interchange fluid into and through the hollow flanges.

'2; A heat interchanging device comprising a casing having an inlet at one end and an outlet at the opposite end, a member supported upon the upper edge of the open top of the casing and provided with a series of parallel depending hollow flanges extending longitudinally of the casing and between which the fluid passes from the inlet to the outlet of the casing, means for feeding a temperature interchange fluid into and through the hollow flanges, and means for directing the flow of the heat interchange fluid medium into the interior of the hol- Vitnesses R. ROSSITER, D. G. MAoGREeoR.

L. R. BROWN.

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