JP2011185526A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger improved in its assembling performance, with respect to the heat exchanger in which a longitudinal end section of a side plate is fixed to a claw section of a core plate. <P>SOLUTION: In this heat exchanger in which the core plate 114 is provided with a holding claw 114d folded back into the U-shape from an end at a tank 120 side, of an outer wall surface 114a of the longitudinal end section of the core plate 114, and extended to a tube 111 side at an outer side of the outer wall surface 114a, and a side plate end section 113b as a longitudinal end section of the side plate 113 is inserted between the outer wall surface 114a and the holding claw 114d, the holding claw 114d has a bent section 114e formed by bending a distal end side extending to the tube 111 side, toward an outer side in the stacking direction. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a heat exchanger suitable for use in a radiator for an automobile, for example.

  As a conventional heat exchanger, for example, the one shown in Patent Document 1 is known. This heat exchanger has a core part formed by interposing fins between a plurality of stacked tubes. Moreover, the core plate is provided in the longitudinal direction edge part of the tube. The core plate includes a tube hole formed in the tube bonding surface and a groove formed around the tube bonding surface. The tube hole has a longitudinal end bonded to the tube hole, and the groove has a groove. Is inserted at the opening end of the tank body.

  Furthermore, a holding claw (claw part) bent 180 degrees from the tank main body side toward the center side in the longitudinal direction of the tube is formed on the outer wall surface (core plate end part) which is the end part in the longitudinal direction of the core plate. Has been. Further, side plates (inserts) for reinforcement are disposed on both sides of the tube portion in the tube stacking direction, and the longitudinal end portions (terminal portions) of the side plates are located between the outer wall surface and the holding claws. Has been inserted. The tube, fin, and core plate are brazed and fixed by a brazing material provided in advance at the portions that contact each other.

JP 2007-120828 A

  When assembling the core portion of the heat exchanger, a plurality of tubes and fins are alternately stacked, and side plates are disposed on both outermost sides in the stacking direction to form a stacked body. And while the longitudinal direction edge part of the tube in a laminated body is inserted in the tube hole of a core plate, the longitudinal direction edge part of a side plate is inserted between an outer wall surface and a holding nail, the assembly of a core part is carried out. It is formed.

  Here, when the laminate is formed, the thickness of the brazing material provided in advance on the surfaces of the tubes or fins is mainly stacked, so that the dimensions in the stacking direction of the tubes and fins are increased, and the end portions of the side plates in the longitudinal direction There is a problem that the position in the laminating direction in the plate tends to shift outward in the laminating direction, and the assemblability when the longitudinal end portion of the side plate is inserted between the outer wall surface and the holding claw is deteriorated.

  In view of the above problems, an object of the present invention is to provide a heat exchanger that can improve the assemblability of the side plate in which the longitudinal end of the side plate is fixed to the claw portion of the core plate.

  In order to achieve the above object, the present invention employs the following technical means.

In the invention according to claim 1, a plurality of stacked tubes (111),
A side plate (113) for reinforcement along the longitudinal direction of the tube (111) and disposed on the outermost side in the stacking direction of the tube (111),
A core plate (114) extending in the stacking direction and connected to the longitudinal end (111a) of the tube (111);
A tank (120, 130) joined to the core plate (114),
The core plate (114) is folded in a U shape from the end of the outer wall surface (114a) of the longitudinal end of the core plate (114) on the tank (120, 130) side, and the outer wall surface (114a) A holding claw (114d) extending to the tube (111) side on the outside is formed,
In the heat exchanger in which the side plate end (113b), which is the longitudinal end of the side plate (113), is inserted between the outer wall surface (114a) and the holding claw (114d),
The holding claw (114d) is characterized in that it has a bent portion (114e) formed by bending the tip side extended toward the tube (111) side toward the outside in the stacking direction.

  According to the present invention, the holding claw (114d) is formed with the bent portion (114e) in which the distal end side extended to the tube (111) side is bent outward in the stacking direction. A wide gap is formed between the outer wall surface 114a and the holding claw (114d) on the side where the end (113b) is inserted.

  Therefore, when the side plate (113) is disposed on the outermost side in the stacking direction of the plurality of stacked tubes (111), the position of the side plate end portion (113b) in the stacking direction is shifted outward in the stacking direction. Even if this occurs, the gap of the bent portion (114e) can be expanded to absorb the position shift of the side plate end portion (113b), so that the side plate end portion (113b) is connected to the outer wall surface (114a). It can be easily inserted between the holding claws (114d).

  The invention according to claim 2 is characterized in that a tapered portion (113d) which is tapered is formed at the tip end portion (113c) of the side plate end portion (113b) facing the holding claw (114d). Yes.

  According to the present invention, the taper portion (113d) can further reduce the degree of interference between the tip portion (113c) of the side plate end portion (113b) and the bent portion (114e) of the holding claw (114d). Therefore, the insertability of the side plate end portion (113b) can be further improved.

In the invention according to claim 3, the dimension of the side plate end portion (113b) in the direction perpendicular to the stacking direction and the longitudinal direction of the tube (111) is formed larger than the dimension in the width direction of the holding claw (114d). And
The side plate end portion (113b) has an extended end portion (113e) extended to the tank (120, 130) side outside the holding claws (114d) in the width direction.
The end position of the holding claw (114d) on the tank (120, 130) side in the longitudinal direction of the tube (111) is the position of the longitudinal end part (111a) of the tube (111) and the extended end part (113e). It is characterized by coincident with the tip position.

  According to the present invention, when the tube (111) and the side plate (113) are assembled to the core plate (114), the longitudinal end of the tube (111) with respect to the end position of the holding claw (114d). When positioning the position of the portion (111a) and the tip end position of the extended end portion (113e), for example, a simple flat plate-like positioning member is arranged on the tank (120, 130) side of the core plate (114). By doing so, it is possible to cope with positioning, and the shape of the positioning member can be simplified to facilitate assembly, and the holding claws (114d) can be deformed by the side plate end (113b). Can be prevented.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description mentioned later.

It is a front view which shows the whole radiator in 1st Embodiment. It is the arrow view seen from the II direction in FIG. It is an exploded view which shows the laminated body and core plate of a tube, a fin, and a side plate. It is sectional drawing which shows the III-III part in FIG.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also a combination of the embodiments even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
A first embodiment of the present invention is shown in FIGS. In the first embodiment, the heat exchanger of the present invention is applied to a radiator 100 that cools an automobile engine (cooling water) with cooling air. FIG. 1 is a front view showing the entire radiator 100, FIG. 2 is an arrow view seen from the direction II in FIG. 1, and FIG. FIG. 4 and FIG. 4 are sectional views showing a III-III portion in FIG.

  As shown in FIGS. 1 to 4, the radiator 100 includes a core portion 110, an upper tank 120, a lower tank 130, and the like. The radiator 100 is of a so-called vertical flow type in which the cooling water flowing in the tube 111 of the core portion 110 is directed downward from above in FIG.

  The core unit 110 includes tubes 111, fins 112, side plates 113, and core plates 114. Each of these members 111 to 114 is made of aluminum or aluminum alloy having excellent strength resistance and corrosion resistance.

  The tube 111 is a tube member through which cooling water flows. The tube 111 is formed, for example, by bending a belt-shaped flat plate so that a cross section perpendicular to the longitudinal direction is flat. Further, the fin 112 is a heat radiating member that expands the heat transfer area (heat radiating area). Here, for example, corrugated fins formed from a thin strip plate material into a corrugated shape by roller processing are used.

  The side plate 113 is a reinforcing member formed in an elongated shape so as to extend along the tube 111. The longitudinal dimension of the side plate 113 is set to be equal to the longitudinal dimension of the tube 111. The general portion 113a in the middle portion in the longitudinal direction of the side plate 113 is formed in a U shape whose cross-sectional shape opens outward in the tube stacking direction. Further, an end portion (hereinafter referred to as a side plate end portion) 113b in the longitudinal direction of the side plate 113 has a flat plate shape that leaves only the bottom portion of the U-shaped general portion 113a, and the outer side in the tube stacking direction. It is formed by being bent so as to have a step. The dimension of the side plate end 113b in the direction perpendicular to the stacking direction and the longitudinal direction of the tubes 111 (hereinafter referred to as the cooling air flow direction) is set to be smaller than the dimension of the general part 113a in the cooling air flow direction. ing.

  The front end side of the side plate end portion 113b is a front end portion 113c. In the side plate end 113b, a tapered portion 113d is formed so as to be tapered at a tip portion 113c on the side facing a holding claw 114d described later. That is, the taper portion 113d is a chamfered portion formed at the distal end portion 113c on the surface facing the holding claw 114d. The taper portion 113d is formed such that, for example, a part of the tip portion 113c is cut by cutting or a portion of the tip portion 113c is crushed by press work so that the plate thickness decreases toward the tip. Alternatively, when the side plate 113 itself is formed by press working, the press sag can be used as the tapered part 113d so that the side plate 113 can be pressed on the side facing the holding claw 114d in the punching line of the side plate end 113b. .

  The dimension of the side plate end 113b in the cooling air flow direction is formed to be larger than the dimension of the holding claws 114d in the cooling air flow direction. An extended end portion 113e extending toward the upper tank 120 is provided at a portion of the side plate end portion 113b located outside the holding claws 114 in the cooling air flow direction. Two extending end portions 113e are provided so as to sandwich the holding claws 114d.

  The core plate 114 is an elongated plate-like member extending in the tube stacking direction, and a groove 114b is formed on the outer peripheral portion (entire periphery) by press molding. The outside of the groove 114b is a wall surface standing in the tube longitudinal direction, and a plurality of claw portions 114c are provided at the end of the wall surface. Of the wall surfaces of the entire circumference of the core plate 114, the wall surface on the side in the longitudinal direction is a portion to which the side plate end portion 113b is joined, and is hereinafter referred to as an outer wall surface 114a.

  A plurality (two) of claw portions 114c are provided on the outer wall surface 114a so as to be symmetric with respect to the center in the cooling air flow direction. The dimension between the two claw portions 114c is set larger than the dimension of the side plate end portion 113b in the cooling air flow direction. A holding claw 114d is formed between the two claw portions 114c (intermediate portion). The holding claw 114d is formed by folding a claw part formed so as to protrude toward the upper tank 120 from the end of the outer wall surface 114a on the upper tank 120 side by 180 degrees toward the tube 111 side. That is, the holding claw 114d includes a folded portion that is folded in a U shape from the end of the outer wall surface 114a on the upper tank 120 side to the tube 111 side, and a claw main body portion that extends further from the folded portion to the tube 111 side. Is formed.

  The dimension of the holding claw 114d in the cooling air flow direction is formed to be smaller than the dimension of the side plate end 113b in the cooling air flow direction. The holding claw 114d is formed with a bent portion 114e in which a distal end side extended to the tube 111 side is bent outward in the stacking direction. Here, the bent portion 114e is formed by bending the distal end side substantially at the center of the holding claw 114d in the longitudinal direction of the tube 111, and is formed to extend linearly toward the distal end. Therefore, a gap corresponding to the plate thickness of the side plate end 113b is formed in the region where the bent portion 114e is not formed between the outer wall surface 114a and the holding claw 114d, and the bent portion 114e is formed. In the region, the gap becomes wider toward the tip side.

  In the inner region of the groove 114b of the core plate 114, a plurality of tube holes 114f corresponding to the position of the plurality of stacked tubes 111 and the cross-sectional shape of each tube 111 are formed.

  A plurality of the tubes 111 and the fins 112 described above are alternately stacked (arranged in the left-right direction in FIG. 1), and the bent portion of the fin 112 bent into a waveform is formed on the outer wall surface of the tube 111. It comes to contact. Further, a side plate 113 is disposed on the outer side of the outermost fin 112 in the tube stacking direction. As shown in FIG. 3, the side plate 113 is disposed such that the distal end position of the extended end portion 113 e coincides with the position of the longitudinal end portion (hereinafter referred to as the tube end portion 111 a) of each tube 111. (Dashed line in FIG. 3).

  As shown in FIG. 4, each tube end portion 111 a is inserted through the tube hole 114 f of the core plate 114. Further, the side plate end portion 113b is inserted into a gap between the outer wall surface 114a of the core plate 114 and the holding claw 114d, and the side plate end portion 113b is in contact with the outer wall surface 114a. Further, the extended end 113e is located on both outer sides of the holding claws 114d in the cooling air flow direction. Here, the end position on the upper tank 120 side of the holding claw 114d in the longitudinal direction of the tube 111 is assembled so as to coincide with the position of each tube end 111a and the end position of the extended end 113e ( (Broken line in FIG. 4).

  Each member 111, 112, 113, 114 is integrally brazed at a portion where the members 111, 112, 113, 114 are in contact with each other by a brazing material provided on each surface of the tube 111, the side plate 113, and the core plate 114. Part 110 is formed.

  The upper tank (tank) 120 and the lower tank (tank) 130 are elongated semi-container bodies extending along the longitudinal direction of the core plate 114, and seal packing (not shown) inserted into the groove 114 b of the core plate 114. Are mechanically joined to the core plate 114 by being caulked by a plurality of claw portions 114c. The plurality of tubes 111 (inside the tubes 111) communicate with the internal spaces of the tanks 120 and 130.

  The upper tank 120 is a tank that distributes cooling water from the engine to each tube 111, and is formed of a resin material (for example, PA material). The upper tank 120 includes a tank main body 121 as a semi-container body having a substantially U-shaped cross-section perpendicular to the longitudinal direction and an opening on the side facing the core plate 114. The tank main body 121 includes a pipe portion 121a for cooling water inflow, a plurality of shroud attachment portions 121b (four locations) for attaching a blower shroud, and a vehicle attachment portion 121c (two locations) for attachment to the vehicle body. ) Are integrally formed.

  The lower tank 130 is a tank that collects cooling water from the tubes 111 and is formed of a resin material (for example, PA material). Similar to the upper tank 120, the lower tank 130 includes a tank body 131 as a semi-container body having a substantially U-shaped cross-section perpendicular to the longitudinal direction and an opening on the side facing the core plate 114. The tank body 131 includes a cooling water outflow pipe 131a, a plurality of shroud attachments 131b for attaching the blower shroud (two places), and a vehicle attachment part 131c for attachment to the vehicle body (two places). A drain portion 131d for discharging cooling water during maintenance is integrally formed. An oil cooler 140 for cooling an ATF (automatic transmission fluid) for an automatic transmission of the vehicle is built in the lower tank 130.

  The radiator 100 formed as described above is disposed in front of the vehicle engine room (rear of the grill), and the vehicle mounting portions 121c and 131c are assembled to the vehicle frame. An inlet hose extending from the vehicle engine is attached to the pipe portion 121a, and an outlet hose returning toward the engine is attached to the pipe portion 131a.

  Cooling water flowing into the upper tank 120 from the pipe portion 121a through the inlet hose from the vehicle engine is distributed to the plurality of tubes 111 and circulates in each tube 111, and is cooled by heat exchange with the cooling air during this time. The At this time, the heat exchange is promoted by the fins 112. Then, the cooling water is collected in the lower tank 130, flows out from the pipe portion 131a, and returns to the engine via the outlet hose.

  In the radiator 100 according to the present embodiment, the side plate end 113b is inserted between the outer wall surface 114a of the core plate 114 and the holding claw 114d in the assembly of the core part 110, so that the side plate 113 is held by the holding claw. A plurality of tubes 111 and fins 113 are sandwiched between the side plates 113 fixed to the core plate 114 by 114d.

  In the present embodiment, since the holding claw 114d is formed with a bent portion 114e whose front end is bent outward in the stacking direction, the outer wall surface 114a and the holding claw 114d on the side where the side plate end 113b is inserted. And a wide gap is formed.

  Here, when the side plate 113 is disposed on the outermost side in the stacking direction of the plurality of stacked tubes 111 and fins 112, the film thickness of the brazing material provided in advance on the surfaces of the tubes 111 or the fins 112 is stacked. As a result, the position of the side plate end 113b in the stacking direction is shifted outward in the stacking direction. However, because the gap of the bent portion 114e increases the amount of misalignment of the side plate end portion 113b, the side plate end portion 113b can be easily inserted between the outer wall surface 114a and the holding claw 114d. be able to.

  Further, since the tapered portion 113d is provided at the distal end portion 113c of the side plate end portion 113b, the degree of interference between the distal end portion 113c and the bent portion 114e can be further reduced by the tapered portion 113d. The insertability of the side plate end 113b can be improved.

  Further, the end position of the holding claw 114d on the upper tank 120 side in the longitudinal direction of the tube 111 is made to coincide with the position of the tube end 111a and the end position of the extended end 113e. When the tube 111 and the side plate 113 are assembled, the tube end 111a and the extended end 113e are positioned relative to the end of the holding claw 114d. By arranging a simple flat plate-like positioning member on the side of 120, positioning can be handled, the shape of the positioning member can be simplified to facilitate assembly, and the side plate end 113b This can prevent the holding claws 114d from being deformed.

(Other embodiments)
In the above embodiment, the bent portion 114e is bent in a straight line, but may be formed so as to curl in a curved line.

  Further, the tapered portion 113d is provided at the tip end portion 113c of the side plate end portion 113b. However, the taper portion 113d may be omitted if the side plate end portion 113b can be easily inserted by the bent portion 114e. good.

  Further, when the tube 111 and the side plate 113 are assembled to the core plate 114, positioning members corresponding to the tube end portion 111a position and the distal end position of the extended end portion 113e can be prepared and handled. If so, the tube end 111a position and the end position of the extended end 113e may be set so as not to coincide with the end position on the upper tank 120 side of the holding claw 114d in the longitudinal direction of the tube 111.

  The target heat exchanger is the radiator 100 for cooling the engine. However, if the side plate end 113b is inserted between the outer wall surface 114a of the core plate 114 and the holding claw 114d, However, the present invention may be applied to an intercooler that cools intake air of an engine, a condenser for a refrigeration cycle, and the like.

100 radiator (heat exchanger)
111 tube 111a tube end (longitudinal end of tube)
113 Side plate 113b Side plate end portion 113d Taper portion 113e Extension end portion 114 Core plate 114a Outer wall surface 114d Holding claw 114e Bending portion 120 Upper tank (tank)
130 Lower tank (tank)

Claims (3)

A plurality of stacked tubes (111);
A side plate (113) for reinforcement along the longitudinal direction of the tube (111), disposed on the outermost side in the stacking direction of the tube (111),
A core plate (114) extending in the laminating direction and connected to a longitudinal end (111a) of the tube (111);
A tank (120, 130) joined to the core plate (114),
The core plate (114) is folded in a U-shape from the end of the outer wall surface (114a) at the longitudinal end of the core plate (114) on the tank (120, 130) side, and the outer wall surface A holding claw (114d) extending to the tube (111) side is formed outside (114a),
In the heat exchanger in which the side plate end (113b), which is the longitudinal end of the side plate (113), is inserted between the outer wall surface (114a) and the holding claw (114d),
The holding claw (114d) has a bent portion (114e) formed by bending a distal end side extending toward the tube (111) toward the outside in the stacking direction. .   2. The taper portion (113 d) which is tapered is formed at a tip end portion (113 c) on the side facing the holding claw (114 d) of the side plate end portion (113 b). Heat exchanger. The dimension of the side plate end portion (113b) in the direction perpendicular to the stacking direction and the longitudinal direction of the tube (111) is formed larger than the dimension in the width direction of the holding claw (114d),
The side plate end portion (113b) has an extended end portion (113e) extending to the tank (120, 130) side outside the holding claws (114d) in the width direction.
The end position of the holding claw (114d) on the tank (120, 130) side in the longitudinal direction of the tube (111) is the longitudinal end position (111a) position of the tube (111) and the extended end. The heat exchanger according to claim 1 or 2, wherein the heat exchanger coincides with a tip position of the portion (113e).

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