U.S. patent application number 12/858138 was filed with the patent office on 2011-02-24 for heat exchanger.
This patent application is currently assigned to PALOMA INDUSTRIES, LTD.. Invention is credited to Yoshio Ando.
Application Number | 20110042048 12/858138 |
Document ID | / |
Family ID | 43242270 |
Filed Date | 2011-02-24 |
United States Patent
Application |
20110042048 |
Kind Code |
A1 |
Ando; Yoshio |
February 24, 2011 |
HEAT EXCHANGER
Abstract
A heat exchanger includes a heat transmitting structure for heat
exchange and a guide member. The heat exchanger is configured to
exchange heat between external fluid flowing outside the heat
transmitting structure and the heat transmitting structure. The
heat transmitting structure includes a plurality of heat
transmitting members for heat exchange. The heat transmitting
members are arranged side by side in such a manner as to have
intervals between the adjacent heat transmitting members. The guide
member is arranged in the intervals between the heat transmitting
members so as to change a direction of the external fluid flowing
outside the heat transmitting structure.
Inventors: |
Ando; Yoshio; (Aichi,
JP) |
Correspondence
Address: |
WESTMAN CHAMPLIN & KELLY, P.A.
SUITE 1400, 900 SECOND AVENUE SOUTH
MINNEAPOLIS
MN
55402
US
|
Assignee: |
PALOMA INDUSTRIES, LTD.
Aichi
JP
|
Family ID: |
43242270 |
Appl. No.: |
12/858138 |
Filed: |
August 17, 2010 |
Current U.S.
Class: |
165/163 |
Current CPC
Class: |
F28D 7/02 20130101; F28F
2240/00 20130101; F28F 9/0131 20130101; F28F 9/22 20130101 |
Class at
Publication: |
165/163 |
International
Class: |
F28D 1/047 20060101
F28D001/047 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 20, 2009 |
JP |
2009-191139 |
Claims
1. A heat exchanger comprising a heat transmitting structure for
heat exchange and a guide member, the heat exchanger being
configured to exchange heat between external fluid flowing outside
the heat transmitting structure and the heat transmitting
structure, the heat transmitting structure including a plurality of
heat transmitting members for heat exchange, the heat transmitting
members being arranged side by side in such a manner as to have
intervals between the adjacent heat transmitting members, the guide
member being arranged in the intervals between the adjacent heat
transmitting members so as to change a direction of the external
fluid flowing outside the heat transmitting structure.
2. The heat exchanger according to claim 1, wherein the heat
transmitting members include pipes inside which internal fluid for
heat exchange can flow, and heat is exchanged between the external
fluid flowing outside the heat transmitting member and the internal
fluid flowing inside the heat transmitting member.
3. The heat exchanger according to claim 2, wherein the heat
transmitting members are arranged to extend in a direction crossing
the flowing direction of the external fluid, and arranged side by
side in a direction crossing a plane defined by a longitudinal
direction of the heat transmitting members and the flowing
direction.
4. The heat exchanger according to claim 3, wherein at least two of
the heat transmitting members are arranged to be in parallel to
each other.
5. The heat exchanger according to claim 4, further comprising a
housing space for housing the heat transmitting structure, and the
external fluid flows through the housing space.
6. The heat exchanger according to claim 1, wherein the heat
transmitting members extend in a spiral manner, and include
crossing members that are arranged to extend in the direction
crossing the flowing direction of the external fluid and connecting
members that connect upstream members which are the crossing
members located upstream in the flowing direction and downstream
members which are the crossing members located downstream in the
flowing direction.
7. The heat exchanger according to claim 6, wherein the guide
member is arranged in one or both of between adjacent first
connecting members which are the connecting members located on one
end sides of the crossing members and between adjacent second
connecting members which are the connecting members located on the
other end sides of the crossing members.
8. The heat exchanger according to claim 7, wherein the heat
transmitting members are arranged side by side in such a manner as
to have regular intervals between the adjacent heat transmitting
members.
9. The heat exchanger according to claim 1, the guide member
includes a plate-like portion interposed between the heat
transmitting members, and a protruding portion protruding from a
plane of the plate-like portion.
10. The heat exchanger according to claim 9, wherein the protruding
portion of the guide member protrudes obliquely toward the heat
transmitting members forming an interval including the plate-like
portion.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of Japanese Patent
Application No. 2009.191139 filed Aug. 20, 2009 in the Japan Patent
Office, the disclosure of which is incorporated herein by
reference.
BACKGROUND
[0002] The present invention relates to a heat exchanger that
exchanges heat between external fluid introduced from outside and
heat transmitting members for heat exchange.
[0003] In the heat exchanger of this type disclosed, for example,
in Unexamined Japanese Patent Publication Nos. 2008-0259'76 and
2008-032252, the pipes are stacked in the housing space to form a
pipe group. Each pipe at least includes cross pipes which are pipes
arranged in a direction crossing a flowing direction of the
external fluid. Each pipe is stacked in a direction crossing a
plane defined by a longitudinal direction of the cross pipes and
the flowing direction. Each pipe is stacked in such a manner that
the pipes adjacent in the stacking direction, as well as the cross
pipes adjacent in the stacking direction, are not brought into
contact with each other.
SUMMARY
[0004] As noted above, since the pipes are stacked so as not to be
brought into contact with each other in the heat exchangers of this
type, the external fluid is easy to flow between the pipes adjacent
to each other in the stacking direction. The faster the flow of the
external fluid between the pipes is, however, the more unlikely
sufficient heat exchange is to be achieved between the external
fluid and internal fluid inside the pipes. For example, the
external fluid may pass through between the pipes before sufficient
heat exchange is achieved. Or, some part of the external fluid may
pass through between the pipes without being brought into contact
with the pipes. In such cases, heat exchange efficiency may be hard
to increase.
[0005] In one aspect of the invention, it is preferable to be able
to enhance heat exchange efficiency of a heat exchanger.
[0006] A heat exchanger of the invention includes a heat
transmitting structure for heat exchange and a guide member. The
heat exchanger is configured to exchange heat between external
fluid flowing outside the heat transmitting structure and the heat
transmitting structure. The heat transmitting structure includes a
plurality of heat transmitting members for heat exchange. The heat
transmitting members are arranged side by side in such a manner as
to have intervals between the adjacent heat transmitting members.
The guide member is arranged in the intervals between the adjacent
heat transmitting members so as to change a direction of the
external fluid flowing outside the heat transmitting structure.
[0007] According to the heat exchanger configured as such, since
the guide member changes the direction of the external fluid
passing through the intervals, the external fluid is difficult to
pass by between the heat transmitting members and then easy to be
brought into contact with the heat transmitting members.
Consequently, heat exchange efficiency can be enhanced. The guide
member may be arranged in at least a section in the intervals
formed between the adjacent heat transmitting members.
[0008] In the heat exchanger of the present invention, the heat
transmitting members may include pipes inside which internal fluid
for heat exchange can flow. Heat may be exchanged between the
external fluid flowing outside the heat transmitting members and
the internal fluid flowing inside the heat transmitting members.
Also, in the present heat exchanger, the heat transmitting members
may be arranged to extend in a direction crossing the flowing
direction of the external fluid (a direction, for example,
orthogonal to the flowing direction of the external fluid on a
plane including the flowing direction). The heat transmitting
members may be arranged side by side in a direction crossing a
plane defined by a longitudinal direction of the heat transmitting
members and the flowing direction.
[0009] Moreover, in the heat exchanger of the present invention, at
least two of the heat transmitting members may be arranged to be in
parallel to each other. The heat exchanger of the present invention
may include a housing space for housing the heat transmitting
structure. The external fluid may flow through the housing
space.
[0010] The heat transmitting members may be formed into a spiral
shape. The spiral shape can also be described as helical shape.
Particularly, the heat transmitting members extend in a spiral
manner. The spiral transmitting members may include crossing
members and connecting members. The crossing members are arranged
to extend in the direction crossing the flowing direction of the
external fluid. The connecting members connect upstream members
which are the crossing members located upstream in the flowing
direction and downstream members which are the crossing members
located downstream in the flowing direction. The heat transmitting
members may be housed in the housing space in such spiral
state.
[0011] With the above constitution, the heat exchanger including
the heat transmitting members having the intervals therebetween as
above (i.e., the heat transmitting members not in contact with each
other) can be achieved by the spiral heat transmitting members.
[0012] One example of the constitution in which the guide member is
arranged in at least a section in the intervals formed between the
spiral heat transmitting members is as follows. Particularly, the
guide member may be arranged in one or both of between first
connecting members (more particularly, between the adjacent first
connecting members) which are the connecting members located on one
end sides of the crossing members and between second connecting
members (more particularly, between the adjacent second connecting
members) which are the connecting members located on the other end
sides of the crossing members. Such constitution allows the guide
member to change the direction of the external fluid passing
between the adjacent connecting members.
[0013] Each of the connecting members connecting the crossing
members contacts the external fluid flowing through the intervals
between the connecting members. Then, heat is exchanged between the
external fluid and the connecting members. If the contact angle
upon contact between the connecting members and the external fluid
is small, thermal boundary layers generated in the connecting
members are difficult to be separated from surface of the
connecting member. In this case, heat is not efficiently exchanged.
The thermal boundary layer herein indicates a layer having a
predetermined thickness, which is brought into contact with a
surface of the heat transmitting member: The thermal boundary layer
has a different temperature than a surrounding area outside the
thermal boundary layer. If the thermal boundary layer exists,
direct heat transmission between the external fluid and the heat
transmitting member is blocked. Thus, thermal conversion efficiency
is reduced.
[0014] However, if the guide member is arranged in the intervals
between the connecting members as in the above-described
constitution, the direction of the external fluid flowing through
the intervals can be changed. Separation of the thermal boundary
layers generated in the connecting members can be promoted. In this
manner, heat exchange efficiency between the connecting members and
the external fluid upon contact between the connecting members and
the external fluid can be enhanced.
[0015] Also, since such change in the direction of the external
fluid can promote separation of the thermal boundary layers in end
areas of the crossing members, heat exchange efficiency in the
whole heat exchanger can be also enhanced.
[0016] Particulars of the guide member in the above-described
respective constitutions are not specifically limited as long as
the direction of the external fluid flowing along a flowing
direction can be changed after the external fluid reaches the guide
member. For example, the guide member may be configured as
below.
[0017] Particularly, the guide member may include a plate-like
portion interposed between the adjacent heat transmitting members,
and a protruding portion protruding from a plane of the plate-like
portion. In this constitution, since the protruding portion
protrudes from the plane of the plate-like portion of the guide
member, the direction of the external fluid flowing along the
flowing direction can be changed. For example, contact of the
external fluid with the protruding portion can change the direction
of the external fluid to a direction toward the adjacent heat
transmitting members forming the interval including the plate-like
portion.
[0018] In the above-described constitution, the protruding portion
of the guide member may only protrude from the plate-like portion.
There is no limitation in where on the plate-like portion the
protruding portion is provided. However, it is preferable that the
protruding portion protrudes from the plate-like portion over as
broad a range as possible in the plate-like portion so that the
external fluid can be guided toward the heat transmitting members
in a broader range.
[0019] Specifically, it is preferable that the protruding portion
may be arranged over the maximum possible range in the plate-like
portion. The protruding portion may be also arranged to extend in
the direction crossing the flowing direction of the external fluid.
In other words, the protruding portion may be arranged such that
the external fluid flowing along the flowing direction of the
external fluid can hit the protruding portion.
[0020] In the above-described constitution, owing to the protruding
portion extending in the direction crossing the flowing direction
of the external fluid, the external fluid flowing through the
intervals between the adjacent heat transmitting members abuts on
the protruding portion and is then guided toward the respective
adjacent heat transmitting members forming the interval including
the plate-like portion. In other words, the direction of the
external fluid flowing along the flowing direction is changed.
[0021] Other constitutions may be described as follows.
Particularly, the protruding portion of the guide member protrudes
obliquely toward one of the two adjacent heat transmitting members
of the heat transmitting members forming the interval including the
plate-like portion of the guide member.
[0022] In the above-described constitution, the external fluid
flowing through the intervals between the heat transmitting members
can be obliquely guided toward one of the two adjacent heat
transmitting members of the heat transmitting members forming the
interval including the plate-like portion of the guide member. In
other words, the direction of the external fluid flowing along the
flowing direction can be changed. In this case, an angle at which
the external fluid abuts on the protruding portion becomes smaller
than a right angle. Thus, the protruding portion does not largely
obstruct the downstream flow of the external fluid. As a result,
the protruding portion can guide the external fluid toward one of
the two adjacent heat transmitting members of the heat transmitting
members forming the interval including the plate-like portion of
the guide member, without largely obstructing the flow of the
external fluid. Opportunities to bring the external fluid into
contact with the heat transmitting members can be increased. In
this case, heat exchange efficiency can be enhanced.
[0023] The protruding portion of the guide member in the
above-described respective constitutions only has to protrude from
the plane of the plate-like portion. For example, the protruding
portion may be a member attached to the plate-like portion, a
member formed by cutting and raising the plate-like portion, or a
member integrally formed with the plate-like portion.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The present invention will be described hereinafter by way
of example with reference to the accompanying drawings, in
which:
[0025] FIG. 1 is a perspective view of appearance of a heat
exchanger 1;
[0026] FIG. 2 is a diagram showing a heat transmitting pipe group 2
viewed in a flowing direction d1 of external fluid;
[0027] FIG. 3A is a plan view of a guide member 3;
[0028] FIG. 3B is a side view of the guide member 3;
[0029] FIG. 4 is a perspective view showing a state of assembling
the heat exchanger 1;
[0030] FIG. 5 is diagram showing an example of the heat exchanger 1
being used; and
[0031] FIG. 6 is an enlarged view showing a protruding portion
37.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0032] (1) Overall Constitution
[0033] Referring to FIG. 5, a heat exchanger 1 passes and
discharges external fluid (not shown) introduced from outside
through a housing space (space inside a casing 10) 11 which houses
a heat transmitting pipe group 2 so as to exchange heat between the
external fluid and internal fluid flowing inside pipes 2a to 2h
(see FIG. 1) constituting the heat transmitting pipe group 2. The
heat transmitting pipe group 2, as shown in FIG. 1, includes a
first pipe set 2x and a second pipe set 2y. The first pipe set 2x
includes the pipes 2a, 2b, 2c and 2d. The second pipe set 2y
includes the pipes 2e, 2f, 2g and 2h.
[0034] In the housing space 11, the pipe 2a spirally extends so as
to form a near rectangle. The same applies to the other pipes 2b to
2h. The pipes 2a to 2h (in other words, the whole heat transmitting
pipe group 2) form a near parallelepiped. The first pipe set 2x and
the second pipe set 2y are slightly shifted from one another along
a flowing direction d1 of the external fluid while being stacked
along a stacking direction d3. The stacking direction d3 is
understood as a direction orthogonal to an arrangement direction of
the pipes 2a to 2d, or an arrangement direction of the pipes 2e to
2h (which is the same direction as the flowing direction d1 of the
external fluid) (see FIG. 1).
[0035] Now, constitutions of the pipes 2a to 2h will be explained.
Hereinafter, description on the pipe 2a will be given and
description on the other pipes 2b to 2h will be omitted, since the
pipes 2b to 2h are constituted in the same manner as the pipe
2a.
[0036] The pipe 2a includes an upstream pipe 26a, a downstream pipe
26b and connecting pipes 28a and 28b. The upstream pipe 26a is part
of the pipe 2a that is arranged along a direction d2 crossing the
flowing direction d1 of the external fluid on an upstream side of
the flowing direction d1 of the external fluid. The downstream pipe
26b is part of the pipe 2a that is arranged along the direction d2
crossing the flowing direction d1 of the external fluid on a
downstream side of the flowing direction d1 of the external fluid.
The connecting pipes 28a and 28b are parts of the pipe 2a that
connects the upstream pipe 26a and the downstream pipe 26b.
Hereinafter, description on the upstream pipes, the downstream
pipes and the connecting pipes of the pipes 2b to 2h is omitted.
However, it is easily understood by those skilled in the art that
the pipes 2b to 2h have the same constitution as the pipe 2a.
[0037] In FIG. 1, three upstream pipes 26a can be seen regarding
the pipe 2a. In FIG. 2, two upstream pipes 26a are shown regarding
the pipe 2a. As shown in FIGS. 1 and 2, the adjacent upstream pipes
26a are positioned at regular intervals along the stacking
direction d3. The same applies to the downstream pipes 26b. Also,
the upstream pipes 26a and the downstream pipes 26b slope with
respect to a horizontal plane in a state where the heat exchanger 1
is installed for use (see FIG. 2).
[0038] Between the first pipe set 2x and the second pipe set 2y,
interspaces 12 (see FIG. 2) are formed which extend along a
longitudinal direction of the pipes 2a to 2h. In each of the
interspaces 12, a guide member 3 is provided to change the
direction of the external fluid flowing along the flowing direction
d1. More particularly, in the present embodiment, the guide member
3 (see FIG. 2) is arranged in both interspaces 12a (see FIG. 2)
which are the interspaces 12 formed between the adjacent connecting
pipes (between the connecting pipe 28a and another connecting pipe
adjacent thereto) and interspaces 12b (see FIG. 2) which are the
interspaces 12 formed between the adjacent connecting pipes
(between the connecting pipe 28b and another connecting pipe
adjacent thereto).
[0039] The guide member 3 is, as shown in FIGS. 3A and 3B, includes
a plate-like portion 33 spreading out to form a near triangle, and
a protruding portion 37 that protrudes from the plate-like portion
33. The protruding portion 37 is formed all along sides 35 and 36
other than a base 34 of the plate-like portion 33. Particularly,
the protruding portion 37 has a shape convexly bent upward (in
particular, orthogonally upward; see FIGS. 3A and 3B), with the
guide member 3 interposed in the interspace 12 and the heat
exchanger 1 arranged in a state of use. Specifically, the
protruding portion 37 protrudes obliquely toward the pipes 2a to 2d
or the pipes 2e to 2h (i.e., the pipes forming the interspaces 12a
and 12b including the plate-like portions 33). Particularly, a
portion R1 (see FIG. 6) corresponds to the portion "protruding
obliquely upward". The portion R1 can be understood as a portion
which is raised upward from an upstream side toward a downstream
side of the convexly bent portion of the protruding portion 37 when
the guide members 3 are arranged in the interspaces 12a and
12b.
[0040] The guide member 3 is interposed between the adjacent
connecting pipes so that the protruding portion 37 abuts on spots
near connection points 7 between the connecting pipe 28a and the
upstream pipe 26a and between the connecting pipe 28a and the
downstream pipe 26b, and spots near connection points 8 between the
connecting pipes 28b and the upstream pipes 26a and between the
connecting pipes 28b and the downstream pipes 26b. Also, in the
plate-like portion 33 of the guide member 3, a plurality of through
holes 39 are formed which penetrate the plate-like portion 33 in
its thickness direction.
[0041] As shown in FIG. 4, the guide member 3 is fixed to the first
pipe set 2x or the second pipe set 2y by clamping members 4 and 5
and bar-like connecting members 6. The clamping members 4 and 5 are
provided to clamp the first pipe set 2x or the second pipe set 2y.
The connecting members 6 connect the clamping members 4 and 5.
[0042] (2) Operation and Effect
[0043] In the heat exchanger 1 constituted as such, the protruding
portion 37 of the guide member 3 can change the direction of the
external fluid flowing along the flowing direction d1 in the midst
of a flow passage of the external fluid. As a result, it is
difficult for the external fluid to pass by between the first pipe
set 2x and the second pipe set 2y. It becomes easy for the external
fluid to be brought into contact with the first pipe set 2x and the
second pipe set 2y (more particularly, the pipes 2a to 2h) forming
the interspaces 12a and 12b including the guide members 3.
Therefore, heat exchange efficiency can be enhanced.
[0044] Also in the above-described embodiment, the guide member 3
is arranged in the respective interspaces 12a and 12b, of the
interspaces 12 (see FIG. 2). Therefore, the direction of the
external fluid flowing along the flowing direction d1 passing
between the interspaces 12a and 12b can be changed.
[0045] If the guide member 3 is arranged in the interspaces 12a and
the interspaces 12b as such, the direction of the external fluid
flowing along the flowing direction d1 flowing through the
interspaces 12a and 12b can be changed. Also, exfoliation of the
thermal boundary layers generated in the connecting pipes 28a and
28b can be facilitated. Thus, heat exchange efficiency by contact
between the connecting pipes 28a, 28b and the external fluid can be
enhanced. The thermal boundary layers are layers having a
predetermined thickness and in contact with surfaces of the pipes
2a to 2h. The thermal boundary layers have a different temperature
than a surrounding area outside the thermal boundary layers.
[0046] The change in the direction of the external fluid flowing
along the flowing direction d1 as such can facilitate exfoliation
of the thermal boundary layers at end portions of the upstream
pipes 26a and the downstream pipes 26b, thereby contributing to
enhancement of heat exchange efficiency in the whole heat exchanger
1.
[0047] In the above-described embodiment, the protruding portion 37
protrudes from the plane of the plate-like portion 33 in the guide
member 3. Thus, the external fluid which abuts on the protruding
portion 37 can flow toward the first pipe set 2x and the second
pipe set 2y forming the interspaces 12a and 12b including the
plate-like portions 33.
[0048] In the above-described embodiment, the external fluid can be
guided toward the downstream pipes 26b located downstream without
largely obstructing the flow of the external fluid. Particularly,
as shown in FIG. 6, the protruding portion 37 does not largely
obstruct downstream flow of the external fluid since an angle
.alpha. at which the external fluid abuts on the protruding portion
37 becomes smaller than a right angle. As a result, the flow of the
external fluid can be adjusted to be brought into contact with the
pipes 2a to 2h (more particularly, the downstream pipes 26b or the
connecting pipes 28a and 28b) at a predetermined angle over a broad
range. Thereby, heat exchange efficiency can be enhanced. As above,
in the present embodiment, the protruding portion 37 has to at
least have a surface with which the external fluid is brought into
contact at the angle .alpha. (see FIG. 6) smaller than a right
angle. The protruding portion 37 can take any form as long as a
surface is provided with which the external fluid is brought into
contact at the angle .alpha. smaller than a right angle.
[0049] In the above-described embodiment, the protruding portion 37
can be formed by easy processing such as bending an edge side of
the plate-like portion 33. Thus, the guide member 3 can be easily
formed from a mere plate-like member. Moreover, by bending the edge
side of the plate-like portion 33, bending strength of the guide
member 3 can be improved.
[0050] When the guide member 3 is arranged between the adjacent
connecting pipes, the protruding portion 37 abuts on the spot near
the connection points 7 between the connecting pipe 28a and the
upstream pipe 26a and between the connecting pipe 28a and the
downstream pipe 26b, or the connection points 8 between the
connecting pipe 28b and the upstream pipe 26a and between the
connecting pipe 28b and the downstream pipe 26b. Thus, backlash in
the pipes 2a to 2h in the stacking direction d3 can be
inhibited.
[0051] In the above-described embodiment, the through holes 39 are
formed in the plate-like portion 33 of the guide member 3. Thus,
fluid such as ambient air and moisture can flow through the through
holes 39. As a result, retention of the fluid around the guide
member 3 can be avoided.
[0052] In the above-described embodiment, the heat transmitting
pipe group 2 is an example of the heat transmitting structure. The
pipes 2a to 2h is an example of the heat transmitting members and
pipes. The flowing direction d1 is an example of the "flowing
direction of the external fluid". The direction d2 is an example of
the "direction crossing the flowing direction of the external
fluid". The direction d3 is an example of the "direction crossing
the surface defined by the longitudinal direction of the heat,
transmitting members and the flowing direction". The upstream pipes
26a and the downstream pipes 26b are examples of the crossing
members, in which the upstream pipes 26a correspond to the upstream
members and the downstream pipes 26b correspond to the downstream
members. The connecting pipes 28a and 28b are examples of the
connecting members. For example, the connecting member 28a
corresponds to the first connecting member, and the connecting
member 28b corresponds to the second connecting member.
[0053] (3) Variations
[0054] In the above, an embodiment of the invention has been
described. It goes without saying, however, that the present
invention is not limited to the above-described embodiment, and can
take various modes within the technical scope of the invention.
[0055] For example, the pipes 2a to 2h may only include sections
(the upstream pipe 26a and the downstream pipe 26b) arranged along
the direction d2 crossing the flowing direction d1 of the external
fluid on upstream and downstream sides. The upstream pipe 26a and
the downstream pipe 26b may be formed by individual pipes.
[0056] The particular constitution of the guide member 3 is not
limited to that of the above-described embodiment, as long as the
guide member 3 can change the direction of the external fluid
flowing along the flowing direction after the external fluid
reaches the guide member 3.
[0057] In the above-described embodiment, the protruding portion 37
may only protrude from part of the plate-like portion 33.
[0058] In the above-described embodiment, the protruding portion 37
of the guide member 3 may only have to protrude from the plane of
the plate-like portion 33. For example, the protruding portion 37
may be a member attached to the plate-like portion 33, a member
formed by cutting and raising the plate-like portion 33, or a
member integrally formed with the plate-like portion 33.
[0059] In the above-described embodiment, the protruding portion 37
may protrude downward (perpendicularly downward) when the guide
member 3 is interposed between the first pipe set 2x and the second
pipe set 2y in a state of use of the heat exchanger 1. Or, the
protruding portion 37 may protrude on both the upper surface side
and lower surface side.
[0060] In the above-described embodiment, the guide member 3 may be
arranged in only one of the interspaces 12a and the interspaces
12b. Also one or more guide members 3 may be provided in the
interspaces between the adjacent upstream pipes 26a.
* * * * *