JP2002286393A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger in which a thermal expansion or contraction of a core which may occur at a temporary connection of the exchanger is absorbed and which has the core of a high dimensional accuracy. SOLUTION: A first bent plate 12 is formed at the end of the side plate 10 of the heat exchanger 1 via a first bent part 11 bent to the inner surface side. Further, a second bent plate 14 is formed at the tip end of the first bent plate 12 via a second bent part 13 bent in an opposite direction to the bending direction of the first bent part 11. An inserting tongue piece 15 is overhung and formed at the tip end of the second bent plate 14. The second bent plate 14 is jointed with a header 2 in a state where the tongue piece 15 is inserted into the inserting hole 9 provided on the outer peripheral surface of the header 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchanger, and more particularly to a heat exchanger suitable as a condenser for a car cooler.

[0002]

2. Description of the Related Art For example, as a condenser for a car cooler,
A so-called multiflow type heat exchanger made of aluminum (including its alloy, the same applies hereinafter) tends to be used favorably. In this heat exchanger, a plurality of flat heat exchange tubes whose ends are connected to both headers are arranged in parallel between a pair of vertically arranged tubular headers, and the plurality of The fins are arranged between each of the heat exchange tubes and outside the outermost heat exchange tube. Further, outside the outermost fin, a side plate for protecting the fin is arranged. Also,
At the end of the header, a header cap for closing the end opening is mounted. Heat exchanger components (heat exchange tubes, fins, etc.) placed between both headers
Is generally called a core part.

[0003] Such a heat exchanger comprises a heat exchange tube,
The heat exchanger components such as fins, headers, and side plates are combined with each other, banded so as to be tied around the outside of the side plates, and brazed together in a furnace in a temporarily assembled state. .

[0004] By the way, since the side plate is generally provided with a mounting piece for mounting and fixing the heat exchanger to a mounting portion of a vehicle body or the like, the side plate is firmly so as not to be easily detached from the heat exchanger. Need to be joined.

[0005] Therefore, in order to firmly join the side plate, the side plate is conventionally assembled with its end portion superimposed on the outer surface of the closing plate portion of the header cap, or the end portion is brought into contact with the outer peripheral surface of the header. The header is assembled or inserted into the insertion hole formed by penetrating the header on the outer peripheral surface through the outer peripheral wall of the header.

[0006]

However, when the end of the side plate is superimposed on the outer surface of the closing plate of the header cap and assembled, the position of the end of the side plate is easily shifted in the left-right direction and the front-back direction. Therefore, it is difficult to position the side plate in these directions during assembly, and furthermore, there is a problem in that the side plate is displaced in these directions during banding or brazing.

When the end of the side plate abuts on the outer peripheral surface of the header and is assembled, the end of the side plate is easily moved up and down, so that it is difficult to position the side plate up and down during assembly. In addition, there is a problem that the vertical displacement of the side plate occurs during banding or brazing. Furthermore, since the end of the side plate is easy to separate from the outer peripheral surface of the header, if the core of the heat exchanger extends in the left-right direction due to brazing heat during brazing, the end of the side plate There has been a problem that it is easily separated from the outer peripheral surface, and as a result, a bonding failure occurs. On the other hand, even if the core of the heat exchanger receives brazing heat and tries to shrink in the left-right direction, the shrinkage is hindered by the side plate, and as a result, the core of the heat exchanger is distorted. there were.

When the end of the side plate is inserted into the insertion hole formed in the outer peripheral surface of the header and assembled, if the core portion of the heat exchanger receives brazing heat during brazing, the left and right sides may be left and right. If extended in the direction, the end of the side plate may come out of the insertion hole,
As a result, there arises a problem that the refrigerant (working fluid) flowing inside the header leaks from the insertion hole. on the other hand,
Even if the core of the heat exchanger tries to shrink in the left-right direction due to the heat of brazing, the shrinkage is hindered by the side plate, and as a result, the core of the heat exchanger is distorted. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to facilitate positioning of a side plate when assembling the side plate. An object of the present invention is to provide a heat exchanger having a core part with high dimensional accuracy, in which thermal expansion and contraction of a core part which may occur when the heat exchanger is joined is absorbed.

[0010]

According to the present invention, a plurality of heat exchange tubes each having an end communicating with both headers are provided between cylindrical headers arranged in parallel with each other. A heat exchanger in which a side plate is arranged outside a fin arranged outside the outermost heat exchange tube of the plurality of heat exchange tubes and arranged side by side, wherein an end of the side plate is provided. A first bent plate portion through a first bent portion bent to the inner surface side;
A second bent plate portion is formed at a distal end portion of the bent plate portion via a second bent portion bent in a direction opposite to a bending direction of the first bent portion, and a second bent plate portion is formed. The second bent plate portion is joined to the header in a state where the insertion tongue portion protruding from the tip portion is inserted into the insertion hole provided on the outer peripheral surface of the header.

[0011] In this heat exchanger, the insertion tongue portion of the side plate is inserted into the insertion hole of the header.
The positioning of the side plate in the up-down direction and the front-rear direction can be easily performed, and the occurrence of positional deviation of the side plate in the up-down direction and the front-rear direction during banding can be prevented.

A first bent plate portion is provided at an end of the side plate via a first bent portion, and a second bent plate is provided at a distal end portion of the first bent plate portion via a second bent portion. Is formed, the thermal expansion and contraction of the core portion of the heat exchanger in the left-right direction is absorbed by the first bent portion and the second bent portion at the time of joining, and as a result, The dimensional accuracy is increased, and the problem of leakage of the working fluid is also prevented.

[0013] In the heat exchanger according to the present invention, the second bent plate portion is provided with the second tongue at both ends thereof in contact with the outer peripheral surface of the header along the circumferential direction. It is desirable that the bent plate part is joined to the header.

In this case, when assembling the side plate, when inserting the insertion tongue piece into the insertion hole,
The edges on both sides of the insertion tongue piece at the tip of the second bent plate portion come into contact with the outer peripheral surface of the header.
The positioning of the side plate in the left-right direction can be easily performed, and the occurrence of the position shift of the side plate in the left-right direction during banding can be prevented. Furthermore, the joining strength is improved by joining in a state where the edges on both sides of the insertion tongue piece at the distal end of the second bent plate portion are in contact with the outer peripheral surface of the header along the circumferential direction.

In the heat exchanger according to the present invention, the bending radius R1 of the first bent portion is set within a range of 20 to 100% with respect to the thickness t of the first bent plate portion. desirable.

The reason is as follows. That is, R
When 1 is less than 20% of t, stress concentration occurs at the first bent portion due to thermal expansion and contraction of the core portion, and therefore, thermal expansion and contraction of the core portion cannot be sufficiently absorbed by the first bent portion. There is a possibility that, at the time of absorption of thermal expansion and contraction of the core portion, a fine crack is generated in the first bent portion, and mechanical strength such as bending strength and tensile strength at the first bent portion is reduced, When the heat exchanger is mounted on a mounting portion such as a vehicle body, the side plate may be broken at the first bent portion. On the other hand, when R1 exceeds 100% with respect to t, the amount of absorption of the thermal expansion and contraction of the core portion in the first bent portion decreases, and the thermal expansion and contraction of the core portion may not be sufficiently absorbed by the first bent portion. There is.
Therefore, it is desirable that R1 is set in the range of 20 to 100% with respect to t. In particular, it is desirable that R1 is set in the range of 20 to 50% with respect to t.

[0017] In the heat exchanger according to the present invention, the bending radius R2 of the second bent portion is set within a range of 20 to 100% with respect to the thickness t of the first bent plate portion. desirable.

In this case, the reason why R1 is set within the predetermined range is the same as that described above.
When 2 is less than 20% with respect to t, stress concentration occurs at the second bent portion due to thermal expansion and contraction of the core portion, so that thermal expansion and contraction of the core portion cannot be sufficiently absorbed by the second bent portion. There is fear. On the other hand, when R2 exceeds 100% with respect to t, the absorption amount of the thermal expansion and contraction of the core portion in the second bent portion is small, so that the thermal expansion and contraction of the core portion may not be sufficiently absorbed in the second bent portion. is there. Therefore, it is desirable that R2 is set in the range of 20 to 100% with respect to t. In particular, it is desirable that R2 is set in the range of 20 to 50% with respect to t.

Further, in the heat exchanger according to the present invention, it is desirable that the bending angle θ1 of the first bent portion is set to less than 90 ° (particularly preferably in the range of 45 to 85 °). With this setting, the thermal expansion and contraction of the core can be reliably absorbed by the first bent portion.
Further, it is desirable that the bending angle θ2 of the second bent portion is set to less than 90 ° (particularly preferably within the range of 45 to 85 °). With this setting, the thermal expansion and contraction of the core portion can be reliably absorbed by the second bent portion.

[0020]

Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 4 show an embodiment of a heat exchanger according to the present invention.

This heat exchanger (1) is used as a condenser for a car cooler made of aluminum.
This is a so-called multi-flow type.

As shown in FIG. 1, the heat exchanger (1) has an end portion between a pair of left and right cylindrical hollow headers (2) (2) extending vertically and arranged in parallel with each other. A large number of flat heat exchange tubes (3), which are connected to the headers (2) and (2) and extend in the left-right direction, are arranged in parallel at predetermined intervals. The fins (4) are arranged between each of 3) and outside the outermost heat exchange tube (3). The core portion includes a number of heat exchange tubes (3) and fins (4) arranged between the headers (2) and (2). Further, a plate-shaped aluminum side plate (10) for protecting the fins (4) is disposed further outside the outermost fins (4). further,
At the end of each header (2), an aluminum header cap (7) in which an outer peripheral wall portion is integrally formed with an outer peripheral edge portion of a circular closing plate portion is fitted in an externally fitted state. An end opening of the header (2) is closed by a header cap (7).

In the heat exchanger (1), each heat exchange tube (3) is made of a flat porous hollow extruded section made of aluminum, and each fin (4) has a wax on both sides or one side. It is manufactured by bending an aluminum brazing sheet having a clad material layer into a corrugated shape. Each header (2) is formed by bending an aluminum brazing sheet having a brazing material layer clad on one side or both sides into a circular pipe shape with the side edges abutting against each other.

In FIG. 1, (5) is a plate-shaped partition member for circulating the refrigerant in a meandering manner along the heat exchange tubes (3), and (6) and (6) are unions for the refrigerant inlet and outlet. It is.

The components of the heat exchanger are assembled together to form a tentatively assembled state, and are further brazed together in a furnace in a state of being banded by a band, so that they are brazed and joined together to form an integrated body. Is what is done.

In this heat exchanger (1), as shown in FIG. 3 and FIG. 4, the end of the side plate (10) has a first bent inside radius at a bending radius R1 and a bending angle θ1.
The first bent plate portion (12) is integrally bent and formed via the bent portion (11), and the bending direction of the first bent portion (11) is provided at the tip of the first bent plate portion (12). Second bent portion (13) bent at a bending radius R2 and a bending angle θ2 in a direction opposite to the direction shown in FIG.
The second bent plate portion (14) is formed by bending integrally with the second bent plate portion (14). Further, an insertion tongue piece (15) is formed integrally with the tip of the second bent plate (14) in the widthwise middle portion thereof. In this embodiment, the bending angle θ1 of the first bent portion (11) and the bending angle θ2 of the second bent portion (13) are set to the same value, and the second bent plate portion (14) is connected to the side plate (10). ) Is formed parallel to the length direction. Also, the second
The edges (14a) (14a) on both sides of the insertion tongue piece (15) at the tip of the bent plate (14) are so arranged as to be able to abut against the outer peripheral surface of the header (2) along the circumferential direction. Is formed. The width of the first bent plate portion (12) and the width of the second bent plate portion (14) are both set to be equal to or smaller than the outer diameter φ of the header (2).

Further, a heat exchanger (1) is mounted on a mounting portion of a vehicle body or the like at one side edge near the first bent portion (11) in the longitudinally intermediate portion of the side plate (10). A mounting piece (17) for fixing the battery is integrally formed by being bent upright on the outer surface side. (17a)
Is a bolt insertion hole formed in the mounting piece (17).

In this side plate (10), the first
The bent plate portion (12) and the second bent plate portion (14) are formed by bending by press bending. By processing in this way, these two bent plate portions (12) and (14) can be easily formed.

On the other hand, on the outer peripheral surface of the header (2) facing the fin (4), the insertion hole (9) for the insertion tongue piece extending in the circumferential direction is provided on the outer peripheral wall of the header (2). It is drilled through the part (8). The insertion tongue piece (15) of the side plate (10) is exactly inserted into the insertion hole (9), and the insertion tongue piece (15) at the tip of the second bent plate (14). The edges (14a) (14a) on both sides abut on the outer peripheral surface of the header (2) in a surface contact state along the circumferential direction thereof, and in this state, the insertion tongue piece of the second bent plate (14) (15) and edge (14a) (14
a) are brazed to the outer peripheral surface of the insertion hole (9) of the header (2) and the outer peripheral surface of the header (2), respectively. Further, the inner surface of the side plate (10) is brazed to the fin (4).

The side plate (10) is integrally joined to the heat exchanger (1) as follows.

First, the tongue piece (15) of the side plate (10) is inserted into the insertion hole (9) of the header (2), and the tongue piece at the tip of the second bent plate (14) is inserted. The edges (14a) (14a) on both sides of the portion (15) are brought into contact with the outer peripheral surface of the header (2). Thus, the side plate (10) is assembled. By inserting the tongue piece (15) of the side plate (10) into the insertion hole (9),
Positioning of the side plate (10) in the up-down direction and the front-rear direction is performed, and the edges (14a) (14a) on both sides of the insertion tongue piece (15) at the tip of the second bent plate (14) are removed. By making contact with the outer peripheral surface of the header (2), the positioning of the side plate (10) in the left-right direction is performed.

Next, the heat exchanger in the temporarily assembled state is banded with a band as described above. At the time of banding, the side plate (10) has the insertion tongue piece (15) inserted into the insertion hole (9) of the header (2). There is no risk of displacement, and the edges (14a) (14a) of the tip of the second bent plate (14) are in contact with the outer peripheral surface of the header (2). There is no danger of occurrence of misalignment in the left-right direction. Next, in this banding state, the second brazing of the side plate (10) is performed by batch brazing in a furnace.
The bent plate portion (14) is brazed to the header (2). Thereby, a desired heat exchanger (1) is obtained.

In the heat exchanger (1) having the above structure, the side plate (10) is brazed to the header (2) with the insertion tongue piece (15) inserted into the insertion hole (9). In addition to the header (2), the edge (14a) (14a) of the tip of the second bent plate (14) is
Since it is brazed to the outer peripheral surface along the circumferential direction, it is easier to braze the header (2) to the header (2) with the insertion tongue piece (15) simply inserted into the insertion hole (9). The edge (14a) (14) of the tip of the second folded plate (14)
Since (a) is brazed to the outer peripheral surface of the header (2), the joining strength of the side plate (2) is increased. Therefore, even when this heat exchanger (1) is fixed to a mounting portion (not shown) of a vehicle body or the like via the mounting piece portion (17), the side plate (10) can be used for traveling. The problem of unintentionally coming off the heat exchanger (1) due to vibration can be reliably prevented, and the heat exchanger (1) can be firmly fixed.

Further, in this heat exchanger (1),
As described above, the first bent plate portion (12) is formed at the end of the side plate (10) via the first bent portion (11), and the first bent plate portion (12) is formed. Since the second bent plate portion (14) is formed at the tip end of the heat exchanger (1) via the second bent portion (13), the core portion of the heat exchanger (1) by brazing heat during brazing joining. 1st bending part (11)
And at the second bent portion (13),
As a result, the dimensional accuracy of the core portion is increased, and the occurrence of the refrigerant leakage problem is prevented.
The reason will be described with reference to FIG. In the figure,
For convenience of explanation, the thickness dimension of the side plate (10) and the length dimension of each part are exaggerated.

That is, if the core of the heat exchanger (1) shrinks in the left-right direction during brazing,
Due to the contraction force of the core portion, the first bent plate portion (12) is bent at the first bent portion (11) in a direction in which the bending angle θ1 increases and the bending angle θ2 at the second bent portion (13) increases. As a result, the contraction of the core portion is absorbed by the first bent portion (11) and the second bent portion (13). On the other hand, when the core portion of the heat exchanger (1) extends in the left-right direction, the first bending plate portion (12) receives the extension force of the core portion, and the bending angle θ1 at the first bending portion (11). Is bent in the direction in which the bending angle decreases and the bending angle θ2 is bent in the direction in which the bending angle θ2 decreases in the second bending portion (13). As a result, the elongation of the core portion is reduced by the first bending portion (11) and the second bending portion. It becomes absorbed in (13). Therefore, even when the core portion of the heat exchanger (1) thermally expands and contracts, the thermal expansion and contraction is absorbed by the first bent portion (11) and the second bent portion (13), and the thermal expansion and contraction occurs. As a result, the core portion is prevented from being distorted, and a core portion with high dimensional accuracy is formed. Moreover,
Even when the core portion of the heat exchanger (1) extends in the left-right direction, the first bent plate portion (12) follows the extension of the core portion.
Is bent at the first bent portion (11) and the second bent portion (13). Therefore, the problem that the refrigerant flowing through the header (2) leaks from the insertion hole (9) also occurs. Will be prevented.

In this side plate (10), the first
The bending radius R1 of the bent portion (11) and the bending radius R2 of the second bent portion (13) are both set within a range of 20 to 100% with respect to the thickness t of the first bent portion (11). ing.
Therefore, since both R1 and R2 are set to 20% or more with respect to t, the first bent portion (11) generated by the thermal expansion and contraction of the core portion of the heat exchanger (1) during brazing. ) And the stress concentration at the second bent portion (13) are reduced, so that the thermal expansion and contraction of the core portion can be reliably absorbed. Further, R1 and R2 are both 10 to t.
Since it is set to 0% or less, the absorption amount of the thermal expansion and contraction of the core portion in the first bent portion (11) and the second bent portion (13) is large. 11) and the second bent portion (13) can sufficiently absorb.

Actually, side plates (10) were prepared in which R1 and R2 were variously changed with respect to t, and these were assembled into a heat exchanger (1) and brazed in a furnace. And R2 are both 20 to 100% with respect to t.
According to the side plate (10) set within the range of
The amount of distortion of the core portion was small, and a core portion with high dimensional accuracy could be formed. Furthermore, according to the side plate (10) in which both R1 and R2 are set within the range of 20 to 50% with respect to t, the amount of distortion of the core portion is extremely small, and the core portion having extremely high dimensional accuracy is reduced. Could be formed. On the other hand, R1 and R2 are both 20 to 1 with respect to t.
In the side plate (10) set outside the range of 00%, the amount of distortion of the core portion was large, and the dimensional accuracy of the core portion was low.

In this heat exchanger (1), the first
It is desirable that both the bend angle θ1 of the bent portion (11) and the bend angle θ2 of the second bent portion (13) are set to less than 90 ° (particularly preferably in the range of 45 to 85 °). With such a setting, the thermal expansion and contraction of the core portion can be more reliably absorbed by the first bent portion (11) and the second bent portion (13).

In this heat exchanger, the thickness t of the first bent plate portion (12) is not particularly limited, and the heat exchanger (1) is connected to the first bent plate portion (12) via the mounting piece (17). The thickness H of the heat exchange tube (3) may be set to a thickness having a mechanical strength such that it is not easily broken by vibrations during running when mounted on a mounting portion of a vehicle body or the like. When (see FIG. 4) is 2.0 mm or less, t is 1 to
It is particularly desirable that the distance is set within the range of 2.5 mm. By setting t within this range, the first bent plate portion (12) not only has a desired mechanical strength, but also reduces the thermal expansion and contraction of the core portion by the first bent portion (11) and the first bent portion. This is because the two bent portions (13) can more reliably absorb the light. In addition, also about the 1st bending part (11) of the side plate (10), the 2nd bending part (13), and the 2nd bending plate part (14), when H is 2.0 mm or less, all are set as follows. It is desirable that the wall thickness is set in the range of 1 to 2.5 mm for the same reason.

In this heat exchanger (1), the width W (see FIG. 4) of the insertion hole (9) is set to 15 to 80% of the outer diameter φ of the header (2). Is desirable. That is, when W is less than 15% of φ, the width of the insertion tongue piece (15) inserted into the insertion hole (9) becomes small, so that the second bent plate part (14) and the header ( This is because the bonding strength with 2) becomes low. On the other hand, W
Is more than 80% of φ, the width of the insertion hole (9) increases, and the refrigerant easily leaks. Therefore, W is 15 to 80% of φ (particularly preferably 1 to 80%).
(5 to 45%).

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various settings can be changed.

For example, in the heat exchanger according to the first aspect of the present invention, as shown in FIG. 5, edges of the insertion tongue piece (15) at both ends of the tip of the second bent plate (14) are formed. 14a ')
(14a ') may be formed in a C shape so that the second bent plate portion (14) is tapered.

Further, as shown in the figure, the insertion tongue piece (15) may be formed so that the thickness becomes thinner toward the tip. By forming the wall in this manner, the insertion tongue piece (15) can be easily inserted into the insertion hole (9). Further, as shown in the figure, the tip corners of both side edges of the insertion tongue piece (15) may be chamfered. By working in this way, the insertion tongue piece (15) can be more easily inserted into the insertion hole (9).

[0045]

As described above, according to the present invention, the second
The second bent plate portion is joined to the header in a state where the insertion tongue piece formed by projecting at the tip portion of the bent plate portion is inserted into the insertion hole provided on the outer peripheral surface of the header. The positioning of the side plate in the up-down direction and the front-back direction can be easily performed at the time of assembling the side plate. Can be prevented.

Further, a first bent plate portion is provided at an end of the side plate via a first bent portion bent toward the inner surface side, and
Since the second bent plate portion is formed at the distal end portion of the bent plate portion via the second bent portion bent in a direction opposite to the bending direction of the first bent portion, when the side plates are joined. ,
It is possible to provide a heat exchanger provided with a core having excellent dimensional accuracy, because heat expansion and contraction in the left-right direction of the core of the heat exchanger can be absorbed by the first bent portion and the second bent portion. Can be. Moreover, when the side plates are joined, even if the core portion of the heat exchanger extends in the left-right direction, the first bent plate portion follows the extension of the core portion and the first bent portion and It becomes bent at the second bent portion, so that it is possible to prevent the problem that the working fluid leaks from the insertion hole.

Further, with the edges of the insertion tongue at both ends at the tip of the second bent plate portion abutting on the outer peripheral surface of the header along the circumferential direction, the second bent plate portion is attached to the header. When the insertion tongue piece is inserted into the insertion hole, the edges on both sides of the insertion tongue piece at the distal end of the second bent plate portion are circumferentially attached to the outer peripheral surface of the header. And the side plate can be easily positioned in the left-right direction. Moreover,
At the time of banding, it is possible to prevent the occurrence of a lateral displacement of the side plate.
In addition, since the edges on both sides of the insertion section at the distal end of the second bent plate portion are abutted on the outer peripheral surface of the header along the circumferential direction, the insertion tongue is simply inserted into the insertion hole. The joining strength can be made higher than that of a structure joined in a state of being inserted inside.

When the bending radius R1 of the first bent portion is set in the range of 20% to 100% with respect to the thickness t of the first bent plate portion, heat exchange is performed at the time of joining. The stress concentration at the first bent portion caused by the thermal expansion and contraction of the core portion of the vessel can be reduced, and therefore, the thermal expansion and contraction of the core portion can be reliably absorbed. Moreover, the amount of thermal expansion and contraction of the core portion in the first bent portion is large, and therefore, the thermal expansion and contraction of the core portion can be sufficiently absorbed by the first bent portion. Therefore, it is possible to provide a heat exchanger provided with a core having more excellent dimensional accuracy.

The same effect as described above can be obtained when the bending radius R2 of the second bent portion is set within the range of 20 to 100% of the thickness t of the first bent plate portion. I can play.

[Brief description of the drawings]

FIG. 1 is a front view showing a heat exchanger according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the heat exchanger.

FIG. 3 is a partially cutaway front view of a main part of the heat exchanger.

FIG. 4 is an exploded perspective view of a main part of the heat exchanger.

FIG. 5 is an exploded perspective view of a main part showing a modification of the heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Heat exchanger 2 ... Header 3 ... Heat exchange tube 4 ... Fin 9 ... Insert hole 10 ... Side plate 11 ... 1st bending part 12 ... 1st bending plate part 13 ... 2nd bending part 14 ... 2nd bending Plate part 15: Insert tongue piece

Claims (4)

[Claims] 1. A plurality of heat exchange tubes (3) whose ends are connected to both headers are arranged in parallel between tubular headers (2) (2) arranged in parallel with each other. A heat exchanger (1) in which a side plate (10) is arranged outside a fin (4) arranged outside an outermost heat exchange tube of the plurality of heat exchange tubes; At the end of the plate (10), a first bent inward
A first bent plate portion (12) via a bent portion (11), and a second bent portion (13) bent at a distal end of the first bent plate portion in a direction opposite to a bending direction of the first bent portion. ) Through the second bent plate part (1
4), and an insertion tongue piece (15) formed by projecting from the tip of the second bent plate portion (14) is provided on an outer peripheral surface of the header (2). 9) The heat exchanger wherein the second bent plate portion (14) is joined to the header (2) while being inserted into the inside. 2. Edges (14a) (14a) on both sides of the insertion tongue piece (15) at the tip of the second bent plate (14) are formed on the outer peripheral surface of the header (2) along the circumferential direction. In the state of contact
The heat exchanger according to claim 1, wherein the second bent plate portion (14) is joined to the header (2). 3. The bending radius R1 of the first bent portion (11) is:
The heat exchanger according to claim 1 or 2, wherein the thickness is set within a range of 20 to 100% with respect to a thickness t of the first bent plate portion (12). 4. The bending radius R2 of the second bent portion (13) is:
The heat exchanger according to any one of claims 1 to 3, wherein the thickness is set in a range of 20 to 100% with respect to a thickness t of the first bent plate portion (12).