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Патент USA US2410912

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Patented Nov. 1, l4
ears
I
2,410,912
near EXCHANGER
Edward A. Wonk, New York, N. Y., assignor to The
Keystone Manufacturing (30., Bu?aio, N. Y” a '
corporation of New York
>
Application May 2, 1944, Serial No. 533,706 '
9 Claims. (Ci. 285—‘-22)
1
2
I
‘
,
This invention relates to a heat exchanger ‘and
more particularly to a heat exchanger made of
threaded and leads to a cylindrical part II which
?ared tubing and ‘?ared tube ?ttings.
In refrigeration work it is frequently desirable
' inner rim of this seat being de?ned by a reduced
to employ ?ared tubing and ?ared tube ?ttings
because of the relatively high pressures encoun
tered. In such work it is frequently'desirable
to provide a heat exchanger in which the tem
The legs 8 and 9 'are provided with a coaxial
terminates in‘ a conical or beveled seat l2, the
bore l3.
‘
bore, the enlarged outer ' end l5 of which is
threaded and leads to a cylindrical part 16 which
terminates in a conical or beveled seat l8, the
perature of a ?uid ?owing in one part of the
liannerlgim of this seat being de?ned by a-reduced
system ‘can be raised or lowered by ‘passing it in 10
heat exchange relation with the ?uid ?owing . Against the conical or beveled seat i8 is ?tted through another part of the'system.
the ?are 20 of a tube 2|, this ?are being provid- .
It is therefore the principal object of the presed in the usual and well known manner at-the
ent invention to provide a heat exchanger which
end of the tube to project laterally therefrom in
is built up of .?ared tubing and ?ttings in which 15 the form of a conical bell. Against the opposite
the joints are strong and are sealed against the
or concave face of this ?are 20 is ?tted a. ring
high pressure to which ?ared tubing is usually
member 23 which has its periphery ?tted in they
subjected and which can be‘ made in any length
bore iii of the body and is provided with a con
to provide any ‘desired amount of heat transfer
ical convexseat 24 ?tting the concave end face
surface.
20 of the ?are 20., This ring member 23 is provid
ore
Another object is to provide such a heat ex
changer in which the principal parts of the ?t
', tings comprise convertible L, T and sight glass
?tting forming the subject of my copending ap
plication Serial No. 533,705, ?led May 2, 1944, 25
and one of the adapters forming part of my co
pending application Serial No. 532,133, ?led
April 21, 1944. By the interchangeable use .of the
.
i
-
ed with a through bore 25 and on its side oppo
site from the seat 24 is provided with a conical
convex seat 26 which is of similar form but ex
tends further toward the axis of the ring mem_
ber than the seat 26 so as to ?t the end face of
the ?are 28 of a. tube 29 whichis of smaller di
ameter than the tube 2|. '
.
'-
-
,
Surrounding the tube 29 is an adapter 30, this
principal elements of these devices, the installer
adapter having a tubular stem which is ?tted
need only carry with him a small number of parts 30 around the tube 29 and also having a laterally
to provide and L, 'a_T, a sight glass or a heat ex
projecting end ?ange 3| which is of ?aring or
changer as occasion may require.
'
Another object is to provide such a heat ex
changer in which thev parts are low in cost and .
bell shaped form to provide a concave conical
end face ?tting the convex conicalface of the
?are 28 of the tube 29 and having a convex con
can be assembled with comparatively little skill. 35
In the accompanying drawing:
ical face on its opposite side.
‘Fig. 1 is a side elevation of one end of a heat
exchanger‘ made in accordance with my inven
tion, the other end being identical and hence
not being illustrated.
'
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_
Fig. 2 is a vertical longitudinal section there'
-
On the stem of this adapter 30 is ?tted a tubu
lar member 35, the body of this tubular member
35 being of Smaller diameter than the bore it
of the body so as to provide an annular chamber
40 36 between the tubular member_35'and the bore
ii of the body. 1 The body of this tubular mem
ber 35 is-likewise provided with holes 38 extend
Each end of the heat exchanger is formed by
ing therethrou'gh, the total cross sectional. area.‘
a ?tting the body of’ which is indicated at 5 and
of these holes being sufficient to permit the un- '
which has three legs or branches 6, 8 and 9, the 45 impeded ?ow of liquid through; the heat ex
leg 6 being at right angles to the legs 8 and 9
changer. The tubular member 35 is provided at
which are axially in line with each other. ‘The
its opposite ends with ?aring or bell-shaped end
leg 9 is substantially shorter- than the other two
?anges 39, the peripheries. of which are ‘adapted
legs to reduce the over-all length of the heat
to ?t the bore 16 of thebody and‘ the concave
exchanger for a given amount of heat transfer 50 end 'face of one of ‘which is ?tted against the
surface and thereby enable the installation of
convexvface of the ?ange M of the adapter 39.
a heat exchanger having the maximum amount
The concave end face of the opposite flange 39
of heat transfer surface in cramped quarters.
of the tubular member 95 seats against one of
The leg'6 of the body is provided with a cen
the convex beveled end faces of a ring or washer
tralbore, the enlarged outer end it or which is 85 40, the periphery of which is ?tted in the bore
through.
'
’
'
.
I
2,410,912
4
heat exchanger having any desired amount ‘of
heat transfersurface can be made of lengths or
?are tubing. Further the parts of the heat ex
l5 of the body and-the bore 4| of which is pref
erably equal to the inside diameter of the tube 2|.
Againstthe opposite convex beveled end face
changer have other uses, as set forth'in my said
of the ring or washer 40 is ?tted the concave end
5
copending applications and can readily be as
face of the ?are 43 of a tube 44, this tube 44
sembled
by one having little skill.
preferably being of the same size as the tube
I claim as my invention:
2|. This ?are is held seated against the ring or
1. A heat exchanger, comprising a pair of tubes ,
washer 40 by an internal ?are nut 45 which is
of
different diameters ?tted coaxially one within
of cylindrical form, the tube 44 being ?tted in
the other and each having its opposite ends ?ared,
its bore. This ?are nut is threaded to screw into
a~T ?tting at the opposite ends of said pair of
the threads l5 of the body and has a concave
tubes and each having one leg provided with a
conical end face which seats against the concave
bore receiving the corresponding ends of said
conical face of the ?are 43 of the tube 44. A
tubes, means providing a sealed joint between the
lead washer 41 is interposed between the head
46 of this internal ?are nut and the end of the 15 larger of said tubes and the surrounding bore of
16
leg 8, this lead washer spreading when the ?are
nut is screwed in and providing full contact to
prevent leakage at this point. It will be seen
that tightening this internal ?are nut 45 forces
said one leg of each of said ?ttings, means within
said bore of each of said ?ttings and establishing
communication between the interior of said larger
tube and a second of said legs, said bore extend
to the right, as viewed in Fig. 2, the ?are 43 of the 20 ing through the third of said legs, and means
within said bore of each of said ?ttings and es
tube 44; the ring or washer 40; the tubular mem
tablishing sealed communication between the in
ber 35; the adapter 30; the ?are 28 of the tube
29; the ring member 23; and the ?are120 of the
terior of the smaller of said tubes and said third
tube 2|, thereby to hold the inter?tting conical
of‘ said legs.
-
-
faces of these various parts in ?rm and leak-tight 25
2. A heat exchanger, comprising a pair of tubes
contact with one another. The internal ?are nut
of different diameters ?tted-coaxially one within
45 is provided with the usual hexagonal or out-of
the other and each having its opposite ends
round head 45 to permit the application of a
?ared, the smaller of said tubes being longer than
wrench in tightening it down.
the larger of said tubes and having its ends pro
Anothertube 50 having a ?are 5| is secured 30 jecting outwardly therefrom, a T ?tting having
in the leg 6 of the body. This tube '50 is prefer
a pair of coaxial legs with a bore extending co
ably of the same size as the tubes 2| and 44 and
axially therethrough and a third'leg arranged
its ?are is ?tted against the conical end face
at an angle to the other legs and having a bore
of a ring or washer 40 which is'identical to the
communicating with said coaxial bore, the bore
ring or washer previously described and is ?tted
through one of said coaxial legs of each ?tting
in the bore ll of the body with its other conical
receiving the corresponding ends of both of said
end face seated against the conical seat 12 at
tubes with the end of the smaller of said tubes
the bottom of this bore ||. The ?are 5| of the
being arranged in said bore adjacent the other
tube 50 is held‘ ?rmly against this ring or washer
coaxial leg thereof, means providing a sealed
40 by an intemal?are nut 45 which is identical 40 joint between the larger of said tubes and the
to the internal ?are nut previously described and
surrounding bore of said one of said coaxial legs,
is screwed into the threads ll] of the body.
means providing a sealed joint between the small
In the operation of the heat exchanger the
er of said tubes and the surrounding bore of
opposite ends of the tubes 29 and 44 are each
said other coaxial leg, and means within said
bore of each of said ?ttings and establishing com
connected with the body 5 of a ?tting as shown
munication between the interior of said larger‘
and each of these bodies is connected with the
tube and said third leg.
tubes 2| and 50. One stream of ?uid can there
3. A heat exchanger, comprising a pair of tubes
fore ?ow axially in through the tube 2| and.
through the bore 25 of the ring member 23 into _ of different diameters ?tted coaxially one within
the tube 29, this stream similarly ?owing out 00 the other and each having its opposite ends
?ared, the smaller of said tubes being longer‘
through the bore 25 and tube 2| at the opposite
than the larger of said tubes and having its ends
end of the heat. exchanger. The other stream
projecting ‘outwardly therefrom, a T ?tting hav
of ?uid enters the tube 50 at one end of the heat
ing a pair of coaxial legs with a bore extending
exchanger and passes through the bore |3 of the
body 5 into the annular chamber 36 around the 55 coaxially therethrough and a third leg having
a bore communicating with said coaxial bore,
tubular member 35. From this annular chamber
the end of said coaxial bore within one of said
the ?uid ?ows through the holes 38 0f the tubular;
coaxial legs being reduced and forming a shoul
member and axially through this tubular member
der opposing the enlarged end thereof, and the
and along the outside of the tube 29. In its
continued ?ow the ?uid ?ows through the bore 60 corresponding ends of both, of said tubes being
?tted in the enlarged end of the coaxial bore of
4| of the ring or washer 40 into the adjacent
each ?tting, means providing an annular seat
end of the tube 44 and out through the ?tting,
between each ?ared end of the smaller of said
5 and tube 50 at the opposite end of the heat
tubes and the corresponding shoulder, means
exchanger. The tube 29 thereby provides a heat
exchange surface, the one ?uid ?owing axially 65 within the larger end of the coaxial bore of each
?tting and providing a seat for the correspond
through this tube in one direction and the other
ing ?ared end of the larger of said tubes and
?uid ?owing axially in the space between this
providing communication between said larger of
tube 29 and the tube 44 in the same or the oppo
said tubes and said thirdleg of each ?tting, and
site direction depending upon whether concur
rent or countercurrent flow is desired. By se 70 means in the enlarged end bf the coaxial bore of
each ?tting and holding th§;.?ared ends of both
lecting the length of the tubes 29 and 44 any
of said tubes in sealed engagement with said
desired amount of heat transfer surface can be
provided.
seats.
‘
4. A heat exchanger, comprising a pair of tubes
the ?ttings embodying the present invention a 75 of different diameters ?tted coaxially one within
From the foregoing it will be seen that with
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I
5
gamma‘
~
the other and each having its opposite ends
?ared, the smaller of said tubes being longer than
the larger of said tubes and having its ends pro
vJ‘ecting outwardly therefrom, a T ?tting having
?tted in the coam‘al bore of each ?tting and in
a pair of coaxial legs with a ‘bore extending co
axially therethrough and a third leg having a
larger of said tubes and thethird leg of each
?tting, and an internal ?are nut screwed in the
bore communicating with said coaxial bore, the
threaded end of the coaxial bore of each ?tting
terposed between the ?ares of the tubes therein,
said tubular member being provided with an
opening providing communication between said
and holding the ?ared ends of both of said tubes
end of said coaxial bore within one of said coaxial
in sealed. engagement with'said seats and against
legs being threaded and the end of said coaxial
- bore within the other of said coaxial legs being 10 said tubular members.
7. 'A heat exchanger, comprising a pair of
reduced and forming a shoulder opposing the ~
?ared ended tubes of di?erent diameters ?tted
threaded end thereof and the-corresponding ends
coaxially one withinrthe other, the smaller of
of both of said tubes being ?tted in the threaded
' said tubes being longer than, the larger of said
end of the coaxial bore of each ?tting, means pro—
viding an annular seat between each ?ared end 15 tubes, a T ?tting having a pair of coaxial legs
' with a bore extending coaxially therethrough and.
4 of the smaller of said tubes and the correspond
ing shoulder,~means within the threaded end of _ a third leg having a bore communicating with the
central part of said coaxial bore, one end of said
said coaxial bore of each'?tting and- providing a
seat for the corresponding end of the larger of
coaxial bore being of reduced diameter and pro
said tubes and providing communication between 20 viding an annular seat opposing the enlarged end
of said bore, said enlarged end of said bore being
said larger of said tubes and said third leg of each
?tting, and an internal ?are nut in the threaded
end of the coaxial bore of each ?tting and hold
ing the ?ared ends of both of said tubes in sealed
engagement with said seats.
'
5. A heat exchanger, comprising a pair of tubes
‘ threaded, a third tube secured in said bore of re
duced diameter and having a ?ared end engag
ing said seat, the corresponding ends of both of
25 said tubes being ?tted in the enlarged end of
said bore, a ring member in the enlarged part of
the coaxial bore of each ?tting and having an
of di?'erent diameters ?tted coaxially one within 9
the other and each having its opposite ends
' nular seats on its opposite sides and engaging re
spectively the ?ares of said third tube and the
than the larger of said tubes and having its ends 30 smaller of said tubes-,atubular member in the
enlarged party of each coaxial bore and interposed
projecting outwardly therefrom, a T ?tting
between the ?ares of said tubes of di?'erent dir
having a pair of coaxial legs with a bore extend
ameters and having an opening providing com
ing coaxially therethrough and a third leg hav
munication between the larger of said'tubes and
ing a bore communicating with said coaxial bore,
?ared, the smaller of said‘ tubes being longer
the end of said coaxial bore within one of said 35 the third leg ‘of each ?tting, and an internal ?are
nut screwed in the threaded end of the coaxial
coaxial legs being threaded and the opposite end
of said coaxial bore being of reduced diameter
and forming a shoulder opposing the threaded
end thereof, and the corresponding ends of both
of said tubes being ?tted in said threaded end of 40
said coaxial bore, means providing an annular
seat between each ?ared end of the smaller of
said tubes and the corresponding shoulder, means
within said threaded end of said bore of each ?t
bore of each ?tting and holding said parts within
each coaxial bore in operative relationto one an
other.
8. _A heat exchanger, comprising a pair of
?ared endedv tubes of different diameters ?tted
coaxially one within the other, the smaller of said
‘tubes being longer than the larger of said tubes,
> a T ?tting having a pairlof coaxial legs with a
bore extending coaxially therethrough and a
third leg having a bore communicating with the
central part of said coaxial bore, one end of said
coaxial bore being of reduced diameter and pro
?ares of the tubes therein and having an opening
viding ‘an annular seat opposing the enlarged
» providing communication between said larger of
said tubes and the third leg of each ?tting, and 50 endof said bore, said enlarged end of said bore
ting arid providing a seat for the corresponding
end of the larger of said tubes, a tubular member
' ,in each coaxial bore and interposed between the
an internal ?are nut screwed in the threaded end
- being threaded, a third tube in said bore of re-'
of the coaxial bore of each ?tting and holding
the ?ared ends of both of said tubes in sealed
engagement with said seats and against said tu
duced diameter and‘ having a ?ared end. engag
ing said seat, the corresponding ends of both of
said tubes being ?tted in the enlarged end of
bular members.
°
55, said bore, a ring member in~the enlarged part of '
6. A heat exchanger, comprising a pair of ?ared
ended tubes of di?erentdiameters ?tted coaxially
one wtihin the other, the smaller of said tubes
the coaxial bore of each ?tting and having an
nular seats on its opposite sides and engaging
respectively the ?ares of said third tube and the
' being longer than the larger of said tubes, at T
smaller of said tubes, a tubular member having
?tting having a'pair of coaxial legs with a bore 60 laterally outward projecting end ?anges ?tted
extending coaxially therethrough and‘ a third
in the enlarged part of the coaxial bore of'each
?tting and interposed between said ?ares of said
leg having a bore communicating with said co
axial bore, the end of said coaxial bore within one . tubes of di?erent diameters therein, said tubular
member being provided with an opening provid
of said-coaxial legs being threaded and the op
posite end of said coaxial bore being of reduced 65 ing communication between said larger of said
diameter and forming va shoulder opposing the ‘ ‘tubes and the third leg of each ?tting, andan in
' threaded end thereof, and the corresponding ends
ternal ?are nut screwedv in the threaded end of
of both of said tubes being ?tted in said threaded ~ the coaxial bore of each ?tting and holding the
end of said coaxial bore, means providing an an- -
said parts» within each coaxial bore in operative
nular seat vbetween each ?ared end of the smaller 70
relation to one another._
of said ' tubes and the corresponding shoulder,
meanswithinsaid threaded endof said bore of each
?tting and providing a seat for the corresponding
end of the larger of said tubes, a tubular member
,
'
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‘
9. A heat exchanger, comprising a .pair' of '
?ared ended . tubes .of different diameters ?tted
coaxially one within the other, the smaller of said
tubes being longer than the larger of said tubes,
having laterally outward projectingv end '?anges 75 a T'?tting having a par of coaxial legs. with a
anemia
.
.
'7
of said tubes of diiierent diameters therein, said
bore extending coaxially therethrough- and a
tubular member being provided with an opening
third leg having a bore communicating with the
central part or said coaxial bore, one end of said . ‘providing communication between the larger oi’
' said tubes and the third leg of each ?tting, an
coaxial bore being of reduced diameter and pro
adapter having a tubular stem ?tted in each of
viding an annular seat opposing the enlarged end
said tubular members and around the corre
of said bore, said enlarged end 01’ said bore being
sponding end 01’ the smaller of said tubes and
threaded, a third tube in said bore of reduced
having a laterally outwardly projecting end
diameter and having a ?ared end engaging said
‘?ange interposed between the adjacent ?are oi’
seat, the corresponding ends of both of said tubes
being ?tted in the enlarged end of said bore, a 10 the smaller of said tubes and the adjacent end
?ange or said tubular member, and an internal
ring member in the enlarged part of the coaxial
bore of each ?tting and having annular seats on _
its opposite sides and engaging respectively the
dams of said third tube and the smaller oi.’ said
tubes, a tubular member having laterally outward
projecting end ?anges ?tted in the coaxial bore
of each ?tting and interposed between the ?ares
?are nut screwed in the threaded end of the co
axial bore of each ?tting and holding the said
parts within each coaxial bore in operative rela
tion to one another.
. EDWARD A. m.
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