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Патент USA US2119761

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June 7, 1938.
c. H..ÈwENTwoRTH
HEAT ` INTERCHANGE DEV'IQE
Filed June 18, 1935
-2,119,761
`intimal June 7, >iosa-
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"2,119,761
UNITEDl STATES PATENT OFFICE
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2,119,761
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HEAT INTERCHANGE DEVICE -
_ „Application
clinton n. June
Wentworth,
1s, >1935,
Lessei-isi
Angeles.
No.' osiif.
251,222
2 claims.
(01.25‘1-255i -
'I‘his invention relates to heat 'interchange ' count of the small size of the view which is
devices and is more particularly directed to that vmainly intended to illustrate the general arrange- `
general type of device which embodies in the ment ofthe parts.
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structure a series of parallel tubes and associated
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fins.
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Fig. 2 is an end elevation partly broken‘away
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and in section.`
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It is an' object of the present invention to proFig. ‘3 is an enlarged detail elevation of a poil'-n
- vide a structure embodying parallel tubes and as- ' tion of Fig. 1, partly in section to more clœrly
sociated radiating fins of corrugated form with show -the details of eonstruei?on.
y
the corrugations thereof of such depth as to exFig. 4 is an elevation of one of the supporting
10 tend from one tube to the next adjacent tube brackets of said unit.
Mr
with the several alternate crests of said corrugaFig. 5 is a Perspective View of a Portion of one
tions directly engaging and formed to embrace
of the radiating ñns of the devieesbown in Fig. 1
the adjacent tubes, whereby, aA good thermal ’
Fig. 6v is an end elevation `0I a multiple ruw
Contact_between the tubes and nns and a rela.- unit, partly broken aWay and in `seetion-
y
l5. tively large total area of heat radiating'surface
Fig- 7 is a Perslleetive View of a Portion of l5
is provided, Vthe entire space between adjacent
tubes becomes divided into a multiplicity of transverse air passages, and the several corrugations
provide directly connected reinforcing elements
20 connecting the several tubes to form an integral
self-supporting structure. ‘
A further object of the invention is to pro-
one of the radiating fins of tlíe unitlsllown in _
Fig- 6A
Fig. 8 is an end elevation of a single eìreuit
double roW unit employing two series of the ra
dieting ñrls disclosed in Fig'. 5»
m
Flß~ 9 is a plan View of a Portion of the llue
Corrugated metal ribbon from which the reslllee-4
vide depressions in all of the several crests, with
tive ñn's are formed, and
the several depressions longitudinally aligned to -’
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^
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Fig'. 10 is an end elevation of said metal ribbon
25 receive the adjacent tubes, whereby the several
The Single circuit or single pass single mwdmit 25
crests partly embrace and thus form better ther- »illustrated in Fig. 1 is of the general form use“
mal contacts. with the associated tubes than can ally employed in domestic refrigeratingapllarams
be had by merely engaging'the apices ofthe several corrugation crests with said tubes.
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3o
as ,a Condenser unit and comprises a oontlnuens
eonduitìC bent to sinuous form to Provide a row
Another >object of the invention is toform such
of relatively Íspaeed Parallel tuiles lo through 30
depressions by depressing and crimping a portion
Whioh the refrigerant is eireulated.-and a Sen'œ i
of each crest of- said fins in such a manner as
of radiating fins F associated with' the several
to form ridges and folds at such depression and
to distort the adjacent connecting wall so as to
tubes- In, the manufacture of this unit. the sev
eïolñns are aSSembled between the tubesnnde'nd
35 provide distorted air passages which will produce ’ plates or'brackets B are slipped over the ends and 35
an appreciable turbulence in the airpcurrents ` return bends of 'the Conduit and- the elim
passing through the unit.
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f
It is another object ofthe invention to provide
a fin structure formed entirely of deformed ma40 terial, and since it is preferable that such de-
formations extend perpendicular to the air pas-
elongated apertures l2 to Permit suell milling
ssges or lengthwise of the strip of metal from
which the nn is made, it is a, further object to
The nns- are preferably assembled between une.
tubes of the sinuous conduit by sliding um .
provide a structure in which eacli of these ñns
45 is formed of a metal ribbon which has been rel-
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dipped in a suitable flux and into a bath of molten
Solder or,otllel‘ suitable metal to bond together -5
the severai‘pal'ts in_to an integral stl'uoture, the '
end Plates having the necessary holes Il and 40
longitudinally. between two adjaoent tubes. the
sueeessive iins lthus entering at opposite 21MB of 45
atively slightly pre-corrugated longitudinally.
Various other ,objects and advantages will be
the tube unit between adjacent return bends with
their depressions engaging the adjnoent tubes.
more fully apparent from the following descrip- ’
It will be notedthat each of the radiating ilus
tion of the accompanying drawing which forms a. is deeply Corrugated so es to extend from one tube
50 part of this disclosure and which illustrates a t0 the next adlaeent tube, thus there is required 50
preferred form of embodiment of the invention. only one of-thesenm for the space between elch
OI the drawing; __
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two'adjacent tubes.
The entire space between '
Fig. 1 is an elevation >of a heat i'nterchanger- such tubes isrby these ñns divided into’a mnlti- '
embodying the features of the present invention, plicityof transverse air passages, the ñns in fact .
55 certain minute -details not being shown on ac- n providing a series of .partitions which directly 55
2,119,761
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the radiating fins are formed of metal ribbon
which has first been deformed throughout its
entire area to augment the turbulence of the air
passing through the several air passages formed
by said fins. The preferred method of construct
contact and are connected to the adiacent'tubes
`thus forming structural connecting members
functioning as reinforcing elements each contrib
uting towards the mechanical _ stability and
strength of the unit, with the several fins provid
ing a relatively large a/rea of _heat radiating sur
ing these fins contemplates a pre-deforming of a
face.
metal ribbon throughout its entirearea and then - -
and, as more speciñcally shown in Fi'g. 5, each
crest has a portion which is depressed and
crimped to forni a depression i5 of semi-circular
intended scope of this invention that deforma
'I'hese deeply corrugated fins provide> alternate forming the above described fin from such pre
crests Il and intermediate connecting walls Il> deformed metal ribbon, and while it is within the
tions may be of any particular desired shape and
arrangement, VI prefer to make such deforma
tions in the form of relatively slight corrugations
shape, with these depressions of l each row of
20 extending longitudinally of the metal ribbon,
crests being longitudinally aligned to receive the
partly embrace said tube and thus provide a good
thermal contact and maintain the fin in place
as shown in Figs. 9 and 10. The fins formed in
this manner have the walls Il thereof provided
with relatively fine corrugations 20 which extend
perpendicular tothe air passages, as shown in
until the unit is bonded together.
Figs. 5 and 7.
15 associated tube Ill. Such depressions enable the
crests to more closely contact the tube and to
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Tests having proven that the unit will have a
higher efficiency when the ñns Aare somewhat de
formed to provide distorted air passages for the
purpose of creating certain turbulence in the air
currents passing between the tubes and through
said air passages, it is proposed to form the de
pressions I5 in a manner which will produce dis- .
torted surfaces which will promoteA such turbu
lence. To this end, the manufacture of these
corrugated fins contemplates the forming of the
30 depressions I5 by merely depressing and crimping
a portion of each crest to form a senil-circular
recess, the metal being allowed to form as it will
into ridges, as indicated at J6, and plaits, as indi
cated at l1.
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In Fig. 6 there is shown a triple pass triple
row unit including three of the conduits C, ar
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_ Thus, instead of providing straight-wail pas
sages such as would permit a smooth undisturbed
passage of the entrained air, my improved type of
baille iin provides air passages formed entirely of
deformed metal so that the air contacts only un
dulatingy or roughened walls which will induce a 25
turbulence of the air throughout its entire trave)
through the air passages. This continuous air
turbulence produces a higher eillciency of heat
-interchange than can be had with those types of
fin construction in which the fins are deformed 30
ranged side by side in spaced relationship with
their similar parallel tubes I0 transversely
aligned. The inlet and outlet ends of these con- ‘
40 duits may be connected by manifold fittings. i8,
only at spaced intervals.
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Further, my improved baille fin produces a
structure whichv has a degree of ,strength and
-stability not inherent in those forms of fins which
l are perforated and stamped to provide deflecting
tangs, it being obvious that such perforations
lessen the structural stability of any form of
radiating fin.
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Heat interchange devices of this nature, having
the described improved type of radiating fins in 40
if desirable or necessary, and the end plates B’ corporated therein, provide a highly eñicient
may be constructed similar in form to the plates structure in which a large area of heat radiating
B of the single pass unit of Fig. 1, excepting that . surface is provided, with such surfaces deformed
they will have three rows of the holes Il and throughout their entire area to induce the con
tinuous turbulence of entrained air necessary lto 45
apertures i2.
'I'he corrugated fins F2 of this multiple unit a rapid and effective transfer of heat, the fins fur
' are exactly of the same form and construction as
ther providing direct mechanical connections of Y
' the ñns F of the single unit previously described,
excepting that they are of greater width and are
good thermal conductivity forming heat-con
ducting bridges between ythe several tubes and
provided with. three rows of aligned depressions
50
i5 to accommodate the three rows of parallel
tubes. With reference to Fig. 6, it will be noted
the single series of wide ñns l“2 extend through
all three coils of this triple unit and thus not only I
55 reinforce each coil but effectively tie all three
coils together at a multiplicity of points through
out the entire area of lthe unit.
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In Fig. 8 there is shown a single pass double
row unit in which a single sinuous conduit C2 is
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formed to provide tworelatively spaced rows of
lparallel tubes, with the tubes of said rows stag
I «. gered transversely, said conduit providing an
' elongated spiral coilforming a continuous cir
cuit alternately including in sequence the tubes of
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both rows.
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Appropriate end
structure, and while the preferred form of struc
ture shown in the drawing- has been described as
being adapted for use in connection with re
frigerating or air conditioning apparatus, it is
to be understood that »the invention is not to be
55.
limited in this regard'for it is also well adapted
for use in anyv situation in which a heat inter
change is to be eñected between two liquids` or
two gases or between a liquid and a gas, and is 60
susceptible of embodiment in various other forms,
all coming within the scope of the following
claims.
I claim:
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.1. Aheat interchange device comprising a plu 65
plates is3 are provided
with rality of parallel tubes arranged in adjacent rows
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their elongated apertures 22 angled to correspond
to the angular dispositioniof the several return
bends of the conduit. Associated with -each row
of tubes, of this unit, is a series' of the radiating
fins F similar in every> detail to the radiating fins
`-of the unit of Fig. 1.
The present invention further includes an im
proved structure in`~which amore effective inter
u
functioning as reinforcing means for the entire 50
change of heat is had by reason of the fact that
disposed in spaced >relationship with the similar
tubes of all of said rows in transverse alignment;
and a single series of radiating iins, ~each of said
hns being disposedbetween similar adjacent tubes 70
4of the several rows and' being corrugated to form
alternate crests closely engaging adjacent tubes
and intermediate connecting walls extending be
tween the tubes of lthe\several rows, relatively
spaced portions of >each of said crests having 75
depressions formed therein withthe depressions of
the several crests longitudinally aligned to receive
the respective tubes.
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2. A heat interchange device comprising a plu
rality of paralleltubes arranged in adjacent rows
disposed in spaced relationship with the similar
tubes of al1 of said rows in transverse alignment;
being formed o! a single metal ribbon corrugated
to form alternate crests' engaging and forming
good thermal contacts with the adjacent parallel
tubes and to -form intermediate unduiated con
necting-walis, said ñns having transversely spaced 5
depressions formed in all of
their " respective
crests. with said depressions of the several- crests
and a single series of imperfo'rate radiating ñns. >longitudinally aligned to receive the respective
each of said ñns being disposed between similar tubes.
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10 Vadjacent parallel tubes of the several rows and
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