U.S. patent application number 12/987473 was filed with the patent office on 2011-07-14 for heat exchanger.
Invention is credited to Hongseong KIM, Hanchoon Lee, Sangyeul Lee, Yongcheol Sa.
Application Number | 20110168369 12/987473 |
Document ID | / |
Family ID | 43858793 |
Filed Date | 2011-07-14 |
United States Patent
Application |
20110168369 |
Kind Code |
A1 |
KIM; Hongseong ; et
al. |
July 14, 2011 |
HEAT EXCHANGER
Abstract
A heat exchanger is provided which may include a first pipe,
into which a first fluid may be introduced and flow, and a second
pipe disposed in the first pipe, into which a second fluid may be
introduced and flow. The first and second pipes may contact each
other, to prevent the second pipe from vibrating.
Inventors: |
KIM; Hongseong; (Seoul,
KR) ; Lee; Sangyeul; (Seoul, KR) ; Sa;
Yongcheol; (Seoul, KR) ; Lee; Hanchoon;
(Seoul, KR) |
Family ID: |
43858793 |
Appl. No.: |
12/987473 |
Filed: |
January 10, 2011 |
Current U.S.
Class: |
165/154 |
Current CPC
Class: |
F28D 7/106 20130101;
F28F 2240/00 20130101; F28F 2265/30 20130101 |
Class at
Publication: |
165/154 |
International
Class: |
F28D 7/10 20060101
F28D007/10 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 11, 2010 |
KR |
10-2010-0002373 |
Claims
1. A heat exchanger comprising: a first pipe into which a first
fluid is introduced and flows; and a second pipe disposed in the
first pipe, into which a second fluid is introduced and flows,
wherein the first and second pipes contact each other so that the
second pipe is prevented from vibrating.
2. The heat exchanger according to claim 1, wherein the first pipe
is formed in a cylindrical shape, and the second pipe is formed in
a wave shape so that a convex portion of the second pipe contacts
an internal surface of the first pipe.
3. The heat exchanger according to claim 1, wherein the first pipe
is formed in a wave shape, and the second pipe is formed in a
cylindrical shape so that a concave portion of the first pipe
contacts an external surface of the second pipe.
4. The heat exchanger according to claim 1, wherein the first and
second pipes are formed in a cylindrical shape, and a vibration
preventing member is provided between the first and second pipes to
prevent the second pipe from vibrating.
5. The heat exchanger according to claim 4, wherein the vibration
preventing member is formed in a hemisphere shape and fixed to an
internal surface of the first pipe, a convex portion of the
vibration preventing member contacting an external surface of the
second pipe.
6. The heat exchanger according to claim 5, wherein a plurality of
vibration preventing members is arranged along a longitudinal
direction of the first pipe, and radially and circumferentially
disposed on the internal surface of the first pipe.
7. The heat exchanger according to claim 5, wherein three vibration
preventing members are circumferentially arranged on the first
pipe, and a central angle formed between any two of the three
vibration preventing members ranges from approximately 100.degree.
to approximately 140.degree..
8. The heat exchanger according to claim 5, wherein a distance
between the vibration preventing members arranged in the
longitudinal direction of the first pipe is approximately 20 to
approximately 40 times an external diameter of the second pipe.
9. The heat exchanger according to claim 4, wherein the vibration
preventing member is formed in a pin shape so that the vibration
preventing member is fixed through the first pipe and an end of the
member contacts an external surface of the second pipe.
10. The heat exchanger according to claim 9, wherein a plurality of
vibration preventing members are arranged along a longitudinal
direction of the first pipe, and are circumferentially arranged on
the internal surface of the first pipe with a predetermined space
therebetween.
11. The heat exchanger according to claim 10, wherein three
vibration preventing members are circumferentially fixed to the
internal surface of the first pipe, and an angle formed between two
of the three vibration preventing members ranges from approximately
100.degree. to approximately 140.degree..
12. The heat exchanger according to claim 10, wherein a distance
between the plurality of vibration preventing members arranged in
the longitudinal direction of the first pipe is approximately 20 to
approximately 40 times an external diameter of the second pipe.
13. The heat exchanger according to claim 1, wherein at least one
of the first pipe or second pipe is shaped different from the other
of the first pipe or second pipe, so as to prevent the respective
pipe from vibrating.
14. A heater comprising the heat exchanger according to claim
1.
15. A cooler comprising the heat exchanger according to claim
1.
16. An evaporator comprising the heat exchanger according to claim
1.
17. A condenser comprising the heat exchanger according to claim
1.
18. A heat exchanger comprising: a first pipe into which a first
fluid is introduced and flows; and a second pipe disposed in the
first pipe, into which a second fluid is introduced and flows,
wherein at least one of the first pipe or second pipe is shaped
different from the other of the first or second pipe, so as to
prevent the respective pipe from vibrating.
19. The heat exchanger according to claim 18, wherein the first
pipe is formed in a cylindrical shape, and the second pipe is
formed in a wave shape so that a convex portion of the second pipe
contacts an internal surface of the first pipe.
20. The heat exchanger according to claim 18, wherein the first
pipe is formed in a wave shape, and the second pipe is formed in a
cylindrical shape so that a concave portion of the first pipe
contacts an external surface of the second pipe
Description
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] Pursuant to 35 U.S.C. .sctn.119 (a), this application claims
priority to Korean Patent Application No. 10-2010-0002373, filed in
Korea on Jan. 11, 2010, the contents of which are hereby
incorporated by reference in their entirety.
BACKGROUND
[0002] 1. Field
[0003] A heat exchanger is disclosed herein.
[0004] 2. Background
[0005] Heat exchangers are known. However, they suffer from various
disadvantages.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Embodiments will be described in detail with reference to
the following drawings in which like reference numerals refer to
like elements, wherein:
[0007] FIG. 1 is a front view of a heat exchanger;
[0008] FIG. 2 is a front view of a heat exchanger according to an
embodiment;
[0009] FIG. 3 is a front view of a heat exchanger according to
another embodiment;
[0010] FIG. 4 is a front view of the heat exchanger according to
another embodiment;
[0011] FIG. 5 is a sectional side view taken along line V-V of FIG.
4;
[0012] FIG. 6 is a front view of a heat exchanger according to
another embodiment; and
[0013] FIG. 7 is a sectional view taken along line of FIG. 6.
DETAILED DESCRIPTION
[0014] Hereinafter, embodiments will be described with reference to
the accompanying drawings. In this disclosure, the size and shape
of components shown in the drawings may be exaggerated for the sake
of clarity and convenience. Further, terms that are specifically
defined in consideration of the construction and operation of
embodiments may be changed according to operator's intention or
custom. Definition of such items should be made on the basis of the
entire contents of the disclosure.
[0015] Generally, a heat exchanger is an apparatus that reduces a
temperature of a high temperature fluid and increases a temperature
of a low temperature fluid by transferring thermal energy from the
high temperature fluid to the low temperature fluid. Such a heat
exchanger may be used in a heater, a cooler, an evaporator, or a
condenser, for example.
[0016] For example, in such a heater, a heat transfer medium used
to transfer heat to a target fluid is referred to as a heat medium,
and a heat transfer medium used to take heat from a target fluid is
referred to as a refrigerant. The fluid used as the heat medium or
refrigerant may be, for example, air or a liquid.
[0017] A double-pipe heat exchanger is one example of a heat
exchanger and includes an internal pipe through which a first fluid
passes, and an external pipe that encloses the internal pipe and
through which a second fluid passes. Heat exchange is performed
between first and second fluids using a side wall of the internal
pipe acting as a heat transfer wall. A typical double-pipe heat
exchanger may be a straight-type double-pipe heat exchanger or a
helical-type double-pipe heat exchanger.
[0018] The straight-type double-pipe heat exchanger has a problem
in that there is a vibration phenomenon in which the internal pipe
vibrates and may contact the external pipe when fluid is circulated
through the pipe in a case where the heat exchanger is long in a
longitudinal direction. Further, because of the vibration
phenomenon described above, there are problems in that the pipe is
continuously worn out, noise occurs, and welding portions may
experience metal fatigue failure. Furthermore, because of this
vibration phenomenon, there occurs a limitation on length when
designing the heat exchanger.
[0019] FIG. 1 is a front view of a heat exchanger. Referring to
FIG. 1, the heat exchanger 1 is a double-pipe heat exchanger, in
which a first pipe 10 and a second pipe 20, whose diameters are
different each other, may be arranged with a concentric axis. A
second fluid path formed by the second pipe 20 and a first fluid
path formed by an external wall of the second pipe 20 and an
internal wall of the first pipe 10 may be independent with each
other. The heat exchanger may receive different temperature fluids
introduced into a first fluid inlet 11 formed in the first pipe 10
and a second fluid inlet 21 formed in the second pipe 20,
respectively, to perform a heat exchange due to the temperature
difference between the two fluids.
[0020] In a case that such a heat exchanger is sufficiently long in
a longitudinal direction, when the fluid is circulated through the
pipes, the second pipe 20 may vibrate and contact the first pipe
10, so that there occurs continuous wear, noise, and metal fatigue
failure at a welding portion(s). Accordingly, in order to prevent
such problems from occurring, a heat exchanger having a vibration
preventing structure is provided.
[0021] FIG. 2 is a front view of a heat exchanger according to an
embodiment. FIG. 3 is a front view of a heat exchanger according to
another embodiment.
[0022] Referring to FIGS. 2 and 3, the heat exchanger 2A, 2B
according to embodiments may include a first pipe 100A, 100B and a
second pipe 200A, 200B. A first fluid may be introduced into and
circulated in the first pipe 100A, 100B, while a second fluid may
be introduced into and circulated in the second pipe 200A, 200B,
which may be arranged in the first pipe 200A, 200B in the form of a
double-pipe type heat exchanger.
[0023] The first fluid may be introduced into the first pipe 100A,
100B through a first fluid inlet 110 formed in one end of the first
pipe 100A, 100B, and may be discharged through a first fluid outlet
120 formed in the other end of the first pipe 100. The second fluid
may be introduced into the second pipe 200A, 200B through a second
fluid inlet 210 formed in one end of the second pipe 200A, 200B,
and may be discharged through a second fluid outlet 220 formed in
the other end of the second pipe 200A, 200B.
[0024] The first and second fluids circulating in the first and
second pipes 100A, 100B and 200A, 200B may have different
temperatures from each other and a heat exchange may be made
utilizing the temperature difference between two fluids. That is, a
higher temperature one of the two fluids may be cooled and a lower
temperature one of the two fluids heated.
[0025] Meanwhile, as shown in FIG. 2, the first pipe 100A of the
heat exchanger 2A may be as a straight pipe of a cylindrical shape,
and the second pipe 200A may be formed in a wave shape in which a
convex portion 230 and a concave portion 240 may be repeatedly
formed. The convex portion 230 of the second pipe 200A may contact
an internal surface of the first pipe 100A and may be fixed
thereto. That is, vibration occurring when the fluid is circulated
may be prevented by making the second pipe 200 not a straight type
pipe but a wave type pipe, and an external surface of the second
pipe 200A may contact the internal surface of the first pipe
100A.
[0026] As such, in the heat exchanger according to this embodiment,
vibration occurring when the fluid is circulated may be prevented
by forming the second pipe 200A in a structure in which the convex
portion 230 and concave portion 240 are repeatedly formed, and then
making the convex portion 230 contact the internal surface of the
first pipe 100A.
[0027] Alternatively, as shown in FIG. 3, the first pipe 100B may
be formed in a wave shape, in which a convex portion 130 and a
concave portion 140 may be repeatedly formed and the second pipe
200B formed in a straight shape. That is, the concave portion 140
of the first pipe 100B may contact an external surface of the
second pipe 200B, so that vibration occurring when the fluid is
circulated may be prevented. The first pipe 100B may be formed in a
wave shape, and the second pipe 200B formed in a straight line
shape so as to contact an internal surface of the first pipe 100B
and may be fixed thereto.
[0028] FIG. 4 is a front view of a heat exchanger in accordance
with another embodiment, and FIG. 5 is a sectional side view of the
heat exchanger of FIG. 4, taken along line V-V of FIG. 4.
[0029] Referring to FIGS. 4 and 5, a heat exchanger 2C in
accordance with this embodiment may include a first pipe 100C, into
which a first fluid may be introduced and flow, a second pipe 200C
inserted into the first pipe 100C so as to form concentric circles
therewith and into which a second fluid may be introduced and flow,
and one or more vibration preventing member(s) 300 installed
between the first and second pipes 100C and 200C, so as to prevent
vibration occurring when the fluid is circulated. In this
embodiment, the first and second pipes 100C and 200C are each
formed as a straight pipe having a cylindrical shape.
[0030] The vibration preventing member(s) 300 may be formed in a
hemisphere shape and may be fixed to an internal surface of the
first pipe 100C, such that a convex surface thereof may contact an
external surface of the second pipe 200C. A plurality of vibration
preventing members 300 may be provided on the internal surface of
the first pipe 100C in a circumferential direction with a
predetermined space therebetween along a longitudinal direction of
the first pipe 100C.
[0031] For example, three vibration preventing members 300 may be
arranged with a space therebetween in the circumferential direction
of the first pipe 100 so that three convex projections 310 may
contact the external surface of the second pipe 200C. For example,
a central angle .theta. formed by two projections 310 of the three
projections 300 may range from approximately 100.degree. to
approximately 140.degree..
[0032] Further, a distance L between the vibration preventing
members 300 disposed with the space therebetween in the
longitudinal direction of the first pipe 100C may be approximately
20 to approximately 40 times an external diameter of the second
pipe 200C.
[0033] FIG. 6 is a front view of a heat exchanger in accordance
with another embodiment, and FIG. 7 is a sectional side view of the
heat exchanger of FIG. 6 taken along line VII-VII.
[0034] Referring to FIGS. 6 and 7, the heat exchanger 2D in
accordance with this embodiment may be similar in construction to
the heat exchanger 2C of the previous embodiment, except that the
vibration preventing member(s) 400 may be formed in a pin
shape.
[0035] The vibration preventing member(s) 400 of the heat exchanger
2D in accordance with this embodiment may be fixed to and through
the first pipe 100D with a predetermined space therebetween, and
ends of the vibration preventing member(s) 400 may contact an
external surface of the second pipe 200D so as to support the
second pipe 200D.
[0036] The vibration preventing member(s) 400 may pass through the
first pipe 100D and may be fixed to the first pipe 100D using a
method, such as, for example, welding, and ends thereof may contact
the external surface of the second pipe 200D.
[0037] A plurality of vibration preventing members 400 may be
provided with a predetermined space therebetween in a longitudinal
direction of the first pipe 100D, and may be disposed on an
internal surface of the first pipe 100D in a circumferential
direction of the first pipe 100D.
[0038] Moreover, the vibration preventing members 400 may be pins
arranged with a space therebetween in the circumferential direction
of the first pipe 100D, so that ends of the pins, which may be
formed in a tapered shape, may contact the external surface of the
second pipe 200D.
[0039] A central angle .theta.1 formed between two pins of the
three pins of the vibration preventing members 400 may range from
approximately 100.degree. to approximately 140.degree.. Further, a
distance M between the vibration preventing members 400 disposed
with the space along the longitudinal direction of the first pipe
100D may be approximately 20 to approximately 40 times an external
diameter of the second pipe 200D.
[0040] Embodiments disclosed herein provide a heat exchanger
capable of preventing a vibration phenomenon of an internal pipe
when fluid is circulated therein, by including a vibration
preventing structure in a straight-type double pipe heat
exchanger.
[0041] Embodiments disclosed herein provide a heat exchanger which
may include a first pipe, through which a first fluid may pass, and
a second pipe disposed in the first pipe, through which a second
fluid may pass, wherein the first and second pipes may touch each
other so that the second pipe may be prevented from vibrating.
[0042] Further, the first pipe may be formed in a cylindrical
shape, and the second pipe may be formed in a wave shape, so that a
convex portion of the second pipe contacts an internal surface of
the first pipe. Alternatively, the first pipe may be formed in a
wave shape, and the second pipe may be formed in a cylindrical
shape, so that a concave portion of the first pipe contacts an
external surface of the second pipe.
[0043] Also, the first and second pipes may be formed in a
cylindrical shape, and a vibration preventing member may be
included between the first and second pipes in order to prevent the
second pipe from vibrating. The vibration preventing member may be
formed in a hemisphere shape and fixed to the internal surface of
the first pipe. A convex portion of the vibration preventing member
may contact the external surface of the second pipe.
[0044] A plurality of the vibration preventing members may be
arranged across a space along a longitudinal direction of the first
pipe, and may be radially and circumferentially disposed on the
internal surface of the first pipe. For example, three vibration
preventing members may be circumferentially arranged across a
space, and a central angle formed by two of the three vibration
preventing members may range from approximately 100.degree. to
140.degree..
[0045] Further, a distance between the vibration preventing members
arranged in the longitudinal direction of the first pipe may be
approximately 20 to 40 times an external diameter of the second
pipe.
[0046] The vibration preventing member may be formed in a pin
shape, so that the member may be fixed through the first pipe and
an end of the member may be brought into contact with the external
surface of the second pipe.
[0047] Any reference in this specification to "one embodiment," "an
embodiment," "example embodiment," etc., means that a particular
feature, structure, or characteristic described in connection with
the embodiment is included in at least one embodiment of the
invention. The appearances of such phrases in various places in the
specification are not necessarily all referring to the same
embodiment. Further, when a particular feature, structure, or
characteristic is described in connection with any embodiment, it
is submitted that it is within the purview of one skilled in the
art to effect such feature, structure, or characteristic in
connection with other ones of the embodiments.
[0048] Although embodiments have been described with reference to a
number of illustrative embodiments thereof, it should be understood
that numerous other modifications and embodiments can be devised by
those skilled in the art that will fall within the spirit and scope
of the principles of this disclosure. More particularly, various
variations and modifications are possible in the component parts
and/or arrangements of the subject combination arrangement within
the scope of the disclosure, the drawings and the appended claims.
In addition to variations and modifications in the component parts
and/or arrangements, alternative uses will also be apparent to
those skilled in the art.
[0049] The heat exchanger disclosed herein may be used, for
example, as a heater, cooler, evaporator and/or condenser in
various appliances and devices disclosed in, e.g., U.S. Pat. Nos.
7,793,551, 7,454,921, 7,856,840, 7,726,141, 7,677,681, 7,347,009,
7,721,559, 7,322,199, 6,843,066, 6,735,975, 6,354,095, 7,726,141,
7,540,169, 7,347,009, 7,716,942, and 7,621,138, whose entire
disclosures are incorporated herein by reference.
* * * * *