JP2006064194A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure brazing performance of a corrugate fin and a tube in a heat exchanger having a deformed part on a side plate for absorbing the difference in thermal expansion between the tube and the side plate. <P>SOLUTION: A stopper 420 is mounted on the side plate 4 for preventing the deformation of the deformed part 410 in the tube stacking direction Y. As the deformation of the deformed part 410 can be prevented by the stopper 420 in integral brazing, that is, the warpage of the side plate 4 can be prevented, the corrugate fin 11 can be surely pressed and the brazing performance of the corrugate fin 11 and the tube can be secured in integral brazing. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to a heat exchanger that exchanges heat between fluids, and is particularly effective when applied to a vehicle radiator that radiates heat of cooling water of a water-cooled engine to the atmosphere.

  As shown in FIG. 7, the conventional heat exchanger forms a core portion 1 by alternately laminating a large number of tubes 10 and a large number of corrugated fins 11. And in order to reinforce the core part 1, the side plate 4 is arrange | positioned at the both ends of the tube lamination direction Y in the core part 1. FIG. .

  This heat exchanger is integrally brazed as follows. That is, after temporarily assembling the components of the heat exchanger so as to have a predetermined heat exchanger structure, the assembly of the heat exchanger structure is tightened from the outside of the side plate 4 with a wire, and the temporary assembly of the assembly is performed. Keep state. Next, this assembly is carried into a brazing furnace and heated to the melting point of the brazing material in the brazing furnace, and the joints of the respective parts of the assembly are integrally brazed.

  Here, the side plate 4 has a function of holding the corrugated fins 11 positioned at both ends in the tube stacking direction Y and ensuring brazing properties between the corrugated fins 11 and the tubes 10.

  By the way, when this heat exchanger is used as a vehicle radiator, the engine cooling water does not flow through the side plate 4 but the engine cooling water flows through the tube 10. The side plate 4 is joined to the corrugated fins 11 and cooled by cooling air. For this reason, a temperature difference arises between the tube 10 and the side plate 4, and a thermal stress is generated due to a difference in thermal expansion. This thermal stress shortens the life of the thin tube 10.

In order to reduce the influence of this thermal stress on the tube 10, the side plate 4 is provided with a deforming portion 410 that absorbs the difference in thermal expansion between the tube 10 and the side plate 4 (see, for example, Patent Document 1).
Utility Model Registration No. 3059971

  However, the conventional heat exchanger deformation portion 410 is easily deformed even with respect to a load in a direction in which the corrugated fins 11 are pressed. Therefore, when the assembly of the heat exchanger structure is tightened from the outside of the side plate 4 with a wire when performing integral brazing, the deforming portion 410 is deformed and the side plate 4 is warped, so that the corrugated fin 11 is securely attached. It was difficult to hold down, and it was difficult to ensure the brazeability between the corrugated fins 11 and the tube 10.

  In particular, there is a problem that the corrugated fins 11 cannot be reliably pressed at both longitudinal ends of the side plate 4, that is, at the four corners of the core portion 1, and the corrugated fins 11 at the four corners of the core portion 1 are easily displaced. It was.

  In view of the above points, an object of the present invention is to secure brazing properties between a corrugated fin and a tube in a heat exchanger in which a deformation portion that absorbs a difference in thermal expansion between the tube and the side plate is provided on the side plate.

  In order to achieve the above object, according to the first aspect of the present invention, a core portion (1) in which a large number of tubes (10) and a large number of corrugated fins (11) are alternately arranged, and a core portion (1). Arranged at both ends of the tube longitudinal direction (X) in the tank (2, 3) communicating with a large number of tubes (10), and arranged at both ends of the tube stacking direction (Y) in the core (1), A side plate (4) having both ends connected to the tank (2, 3), and a side plate (4) provided with a deforming portion (410) that facilitates deformation in the longitudinal direction of the side plate (4). In the heat exchanger, the side plate (4) is provided with a stopper (420) that supports the deforming portion (410) from the side opposite to the core portion and prevents deformation of the deforming portion (410) in the tube stacking direction (Y). Features provided To.

  According to this, since the deformation of the deformed portion during the integral brazing can be prevented by the stopper, that is, the side plate can be prevented from warping, the corrugated when performing the integral brazing. The fins can be pressed down securely, and the corrugated fins and the tube can be brazed.

  In the invention according to claim 2, the core portion (1) in which a large number of tubes (10) and a large number of corrugated fins (11) are alternately stacked, and the tube longitudinal direction (X) in the core portion (1) Are disposed at both ends of the tank (2 and 3) communicating with a number of tubes (10), and are disposed at both ends in the tube stacking direction (Y) of the core (1). In the heat exchanger, the side plate (4) is provided with a deforming portion (410) that facilitates deformation in the longitudinal direction of the side plate (4). In the fin joint surface (411, 412) on the core part (1) side in (4), the fin joint surface (411) on both ends in the longitudinal direction is more core part (1) than the fin joint surface (412) in the center part in the longitudinal direction. ) Protruding to the side And said that you are.

  According to this, even when the deformed portion is slightly deformed when performing integral brazing, the corrugated fins can be securely pressed at both ends in the longitudinal direction of the side plate, that is, at the four corners of the core portion.

  In the invention according to claim 3, the core part (1) in which a large number of tubes (10) and a large number of corrugated fins (11) are alternately stacked, and the tube longitudinal direction (X) in the core part (1) Are disposed at both ends of the tank (2 and 3) communicating with a number of tubes (10), and are disposed at both ends in the tube stacking direction (Y) of the core (1). A side plate (4) connected to the side plate (4), wherein the side plate (4) has a deformable portion (410) that facilitates deformation in the longitudinal direction. The side plate (4) is provided with a stopper (420) that supports the portion (410) from the side opposite to the core and prevents the deformation portion (410) from deforming in the tube stacking direction (Y). Core part in The fin joint surfaces (411, 412) on the 1) side are such that the fin joint surfaces (411) on both ends in the longitudinal direction protrude from the fin joint surface (412) in the center in the longitudinal direction toward the core (1) side. It is characterized by.

  According to this, the effect of the invention of claim 1 and the effect of the invention of claim 2 can both be obtained.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
A first embodiment of the present invention will be described. In this embodiment, the heat exchanger according to the present invention is applied to a radiator that cools the cooling water of a water-cooled engine for vehicle travel.

  1A is a front view of a radiator according to the present embodiment, FIG. 1B is a plan view of FIG. 1A, and FIG. 2 is an enlarged front view of a portion A in FIG. 3 is a perspective view of part A in FIG. 1A, FIG. 4A is a front view of the side plate of FIG. 1, FIG. 4B is a plan view of FIG. 4A, and FIG. FIG. 5A is an enlarged front view showing a portion B in FIG. 4A, and FIG. 5B is a plan view of FIG. 5A.

  As shown in FIGS. 1 to 3, the radiator includes a rectangular parallelepiped core portion 1, and the core portion 1 includes a large number of tubes 10 and a large number of corrugated fins 11 that are alternately stacked. .

  The tube 10 is made of an aluminum alloy, and has a flow path through which cooling water of a water-cooled engine (not shown) mounted on the vehicle flows, and is formed in a flat shape. The corrugated fin 11 is made of an aluminum alloy, and is formed in a corrugated shape to promote heat exchange between air and cooling water.

  Tanks 2, 3 communicating with the flow paths of the numerous tubes 10 are disposed at both ends of the tube portion X in the core portion 1.

  One tank 2 is made of an aluminum alloy, and distributes and supplies the high-temperature cooling water flowing out from the engine to many tubes 10. This one tank 2 is provided with an aluminum alloy inlet pipe 20 connected to the cooling water outlet side of the engine via a hose (not shown).

  The other tank 3 is made of an aluminum alloy and collects and collects cooling water cooled by heat exchange with air and drains it toward the engine. The other tank 3 is provided with an aluminum alloy outlet pipe 30 connected to the cooling water inlet side of the engine via a hose.

  Side plates 4 that reinforce the core portion 1 are disposed at both ends of the core portion 1 in the tube stacking direction Y. The side plate 4 is made of an aluminum alloy, extends in a direction parallel to the tube longitudinal direction X, and both ends thereof are connected to the tanks 2 and 3.

  As shown in detail in FIGS. 3 to 5, the side plate 4 is press-molded so as to have a U-shaped cross section, thereby a fin pressing plate portion 41 that holds the corrugated fin 11, and a fin pressing plate portion. Ribs 42 located on both sides of 41 are formed.

  At both ends of the fin pressing plate portion 41 in the side plate longitudinal direction (the same direction as the tube longitudinal direction X), a deforming portion 410 having a U-shaped cross section and facilitating deformation of the fin pressing plate portion 41 in the side plate longitudinal direction. Is formed. And when a thermal expansion difference arises in the tube 10 and the side plate 4, a thermal expansion difference is absorbed by deformation | transformation of the deformation | transformation part 410, and the thermal stress which acts on the tube 10 is suppressed.

  The fin joint surfaces 411 and 412 which are the surfaces on the core side 1 of the fin pressing plate 41 are the end side fin joint surfaces 411 on both ends in the longitudinal direction of the side plate, and the central fin joint surface 412 in the central portion in the longitudinal direction of the side plate. Rather than the step S, it protrudes toward the core portion 1 side. Incidentally, the step S is set to about 0.07 mm.

  At both ends of the rib 42 in the longitudinal direction of the side plate, protruding piece-shaped stoppers 420 extending in a direction parallel to the longitudinal direction of the side plate are formed. The stopper 420 is positioned on the side opposite to the core portion 1 from the deformable portion 410 and is close to the deformable portion 410 in a free state. The deformable portion 410 is deformed in the tube stacking direction Y and away from the core portion 1. To prevent it.

  Note that at least a part of the tube 10, the corrugated fin 11, the tanks 2 and 3, the pipes 20 and 30, and the side plate 4 uses a clad material in which a brazing material is clad.

  The radiator of the present embodiment having the above configuration is integrally brazed as follows. First, the tubes 10, corrugated fins 11, tanks 2, 3, pipes 20, 30, and the side plate 4 that are components of the radiator are temporarily assembled so as to have a predetermined radiator structure, and then the side plate 4 The assembly of the radiator is tightened from the outside, and the temporarily assembled state of the assembly is maintained. Next, this assembly is carried into a brazing furnace and heated to the melting point of the brazing material in the brazing furnace, and the joints of the respective parts of the assembly are integrally brazed.

  In this brazing process, when the assembly is tightened from the outside of the side plate 4 with a wire, the central fin joint surface 412 is pushed to the core portion 1 side by the tightening force, and the tube laminating direction Y and the core portion 1 The deforming portion 410 is deformed in the direction of moving away, and the side plate 4 tries to warp.

  However, at this time, since the stopper 420 supports the deforming portion 410 and prevents the deformation of the deforming portion 410, the side plate 4 is prevented from warping. Accordingly, the corrugated fins 11 can be reliably pressed even at the end side fin joint surfaces 411 when performing brazing. In other words, the corrugated fins 11 can be reliably pressed in the entire area of the fin bonding surfaces 411 and 412 in the fin pressing plate portion 41, and the brazability between the corrugated fins 11 and the tube 10 can be ensured.

  Further, even if the deforming portion 410 is slightly deformed when performing the brazing, the end portion side fin joint surface 411 protrudes toward the core portion 1 side by the step S from the center portion fin joint surface 412. The corrugated fin 11 can be reliably pressed by the side fin joint surface 411.

(Second Embodiment)
A second embodiment of the present invention will be described. Fig.6 (a) is a front view of the principal part of the side plate in the radiator which concerns on 2nd Embodiment, FIG.6 (b) is a top view of Fig.6 (a). The same or equivalent parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The stopper 420 of the first embodiment extends in a direction parallel to the longitudinal direction of the side plate. However, the stopper 420 of the present embodiment is bent so that the front end side enters inside as shown in FIG. Yes. Thereby, when the deformation | transformation part 410 tends to deform | transform in the tube lamination direction Y and the direction away from the core part 1, the deformation | transformation part 410 can be made to contact | win the stopper 420 reliably.

(Other embodiments)
In each said embodiment, although this invention was applied to the radiator, this invention is applicable also to heat exchangers other than a radiator.

  Further, in each of the above embodiments, two deformation portions 410 are formed on each side plate 4, but one deformation portion 410 may be formed on each side plate 4.

(A) is a front view of the radiator which concerns on 1st Embodiment of this invention, (b) is a top view of (a). It is a front view which expands and shows the A section in Fig.1 (a). It is a perspective view of the A section in Fig.1 (a). (A) is a front view of the side plate of FIG. 1, (b) is a top view of (a). (A) is the front view which expands and shows the B section in Fig.4 (a), (b) is a top view of (a). (A) is a front view of the principal part of the radiator which concerns on 2nd Embodiment of this invention, (b) is a top view of (a). It is sectional drawing which shows the conventional heat exchanger.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Core part, 2, 3 ... Tank, 4 ... Side plate 4, 10 ... Tube, 11 ... Corrugated fin, 410 ... Deformation part, 420 ... Stopper, X ... Tube longitudinal direction, Y ... Tube lamination direction.

Claims (3)

A core portion (1) in which a large number of tubes (10) and a large number of corrugated fins (11) are alternately stacked;
Tanks (2, 3) disposed at both ends of the tube longitudinal direction (X) in the core (1) and communicating with the multiple tubes (10),
A side plate (4) disposed at both ends of the tube stacking direction (Y) in the core portion (1) and having both ends connected to the tanks (2, 3);
In the heat exchanger in which the deformation part (410) that facilitates deformation in the longitudinal direction of the side plate (4) is provided in the side plate (4),
The side plate (4) is provided with a stopper (420) that supports the deforming portion (410) from the side opposite to the core portion and prevents deformation of the deforming portion (410) in the tube stacking direction (Y). A heat exchanger characterized by. A core portion (1) in which a large number of tubes (10) and a large number of corrugated fins (11) are alternately stacked;
Tanks (2, 3) disposed at both ends of the tube longitudinal direction (X) in the core (1) and communicating with the multiple tubes (10),
A side plate (4) disposed at both ends of the tube stacking direction (Y) in the core portion (1) and having both ends connected to the tanks (2, 3);
In the heat exchanger in which the deformation part (410) that facilitates deformation in the longitudinal direction of the side plate (4) is provided in the side plate (4),
The fin joint surfaces (411, 412) on the side of the core (1) in the side plate (4) are such that the fin joint surfaces (411) on both ends in the longitudinal direction are more than the fin joint surfaces (412) in the center in the longitudinal direction. A heat exchanger that protrudes toward the core (1). A core portion (1) in which a large number of tubes (10) and a large number of corrugated fins (11) are alternately stacked;
Tanks (2, 3) disposed at both ends of the tube longitudinal direction (X) in the core (1) and communicating with the multiple tubes (10),
A side plate (4) disposed at both ends of the core (1) in the tube stacking direction (Y) and having both ends connected to the tanks (2, 3);
In the heat exchanger in which the deformation part (410) that facilitates deformation in the longitudinal direction of the side plate (4) is provided in the side plate (4),
The side plate (4) is provided with a stopper (420) that supports the deformation portion (410) from the side opposite to the core portion and prevents the deformation portion (410) from deforming in the tube stacking direction (Y).
The fin joint surfaces (411, 412) on the side of the core (1) in the side plate (4) are such that the fin joint surfaces (411) on both ends in the longitudinal direction are more than the fin joint surfaces (412) in the center in the longitudinal direction. A heat exchanger that protrudes toward the core (1).

Images