JP6102551B2 - Manufacturing method of heat exchanger - Google Patents

Description

The present invention relates to a method of manufacturing a heat exchanger that performs heat exchange between an external fluid flowing outside and a heat medium.

  2. Description of the Related Art Conventionally, in a heat exchanger that includes a core portion having a plurality of tubes and fins through which a heat medium flows and a side plate that is joined to an end portion of the core portion and reinforces the core portion, the heat exchanger is attached to a vehicle. The one provided with a bracket as a connecting part is disclosed (for example, see Patent Document 1).

  In the heat exchanger described in Patent Document 1, the bracket is joined to the core portion by brazing the core component such as a tube or fin and the bracket together. Specifically, the bracket is brazed to the bottom surface of the side plate.

Japanese Patent Laid-Open No. 2004-243953

  As described above, in the heat exchanger described in Patent Document 1, since the core component and the bracket are brazed integrally, the design freedom of the bracket is low due to the restriction of the heating furnace for brazing. Problems arise.

  By the way, when performing brazing joining between different parts, there exists a brazing material length (hereinafter, also referred to as a necessary brazing material length) necessary to make the strength and rigidity between the parts equal to or higher than the required values. Here, as in the heat exchanger described in Patent Document 1 described above, when brazing the bracket to the bottom surface of the side plate, whether the brazing material length satisfies the necessary brazing material length after the brazing process. In order to confirm, it is necessary to disassemble the bracket and the side plate once, which is very complicated.

In view of the above points, the present invention provides a method for manufacturing a heat exchanger that includes a connecting component with another component. In addition, the design flexibility of the connecting component is improved and whether or not good bonding with the connecting component is obtained. The purpose is to make it easier to confirm.

In order to achieve the above object, the invention according to claim 1 is configured by stacking a plurality of tubes (2) through which a heat medium flows, and an external fluid that flows around the heat medium and the tubes (2). Heat exchanger body (1) having a core part (4) for heat exchange between and a side plate (6) joined to the core part (4) and disposed at the end of the core part (4) ) And a connection part (7) for connecting the heat exchanger main body (1) and other parts, the side plate (6) being substantially the same as the longitudinal direction of the tube (2). It has a base part (61) extending in parallel, the core part (4) is joined to one surface of the base part (61), and the connecting part (7) is a base part ( 61) Joined to the part farther from the core part (4) than Has a surface portion (72c), the flat portion (72c), in the manufacturing method of the heat exchanger cutout (73) is provided, assembled provisionally to the assembly heat exchanger body part (1) Provisional Process, integrated brazing process of integrally brazing the heat exchanger main body (1) temporarily assembled in the temporary assembling process, and side of the heat exchanger main body (1) integrally brazed in the integral brazing process Temporarily fixing the connecting component (7) to the plate (6), and after the temporary fixing step, the flat portion (72c) of the connecting component (7) is partially heated to thereby form the side plate (6). And a connecting part brazing step for brazing the portion farther from the core portion (4) than the base portion (61) and the flat portion (72c) .

  According to this, since the connection component (7) has the plane part (72c) joined to the side plate (6), after the integral brazing of the heat exchanger body (1), the connection component ( 7) and the side plate (6) are partially heated, so that the connecting component (7) can be brazed to the heat exchanger body (1). At that time, the plane part (72c) of the connection part (7) is joined to a part of the side plate (6) that is farther from the core part (4) than the base part (61). ) And the side plate (6) can be partially heated so that the core (4) is hardly affected.

  Therefore, since it is not necessary to braze the connection component (7) integrally with the heat exchanger main body (1), there is no restriction on the shape of the connection component (7) due to the space of the heating furnace. For this reason, it becomes possible to improve the freedom degree of design of a connection component (7).

  Moreover, since the notch (73) is provided in the plane part (72c), whether or not the necessary brazing length is satisfied at the joint between the connecting part (7) and the side plate (6) is determined. This can be confirmed by visual inspection from the notch (73). Therefore, in order to confirm whether or not the brazing filler metal length satisfies the required brazing filler metal length at the joint between the connecting part (7) and the side plate (6), the connecting part (7) and the side plate (6). There is no need to disassemble. Therefore, it becomes possible to easily confirm whether or not the heat exchanger main body (1), that is, the side plate (6) is well bonded to the connection component (7).

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

It is a front view showing the refrigerant radiator concerning a 1st embodiment. It is II-II sectional drawing of FIG. It is a front view which shows the bracket in 1st Embodiment. It is the IV section enlarged view of FIG. It is an expansion perspective view which shows the bracket vicinity in the refrigerant radiator which concerns on 2nd Embodiment. It is a perspective view which shows the bracket in 3rd Embodiment. It is an expansion perspective view which shows the 2nd fixing | fixed part of the bracket in other embodiment (1). It is a perspective view which shows the bracket in other embodiment (2).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the heat exchanger according to the present invention is used in the refrigerant radiator 1 that exchanges heat between the discharged refrigerant discharged from the compressor of the refrigeration cycle and the blown air to dissipate the heat of the discharged refrigerant to the blown air. It is applied. In addition, the refrigerant | coolant heat radiator 1 of this embodiment comprises the heat exchanger main-body part as described in a claim.

  In FIG. 1, the tube 2 is a tube through which the refrigerant flows. The tube 2 is formed in a flat shape so that the flow direction of the blown air (perpendicular to the paper surface) coincides with the major axis direction, and the longitudinal direction thereof is A plurality of them are arranged in parallel in the vertical direction so as to coincide with the horizontal direction. Hereinafter, the longitudinal direction of the tube 2 (the left and right direction on the paper surface) is referred to as the tube longitudinal direction, and the stacking direction of the tubes 2 (the vertical direction on the paper surface) is referred to as the tube stacking direction.

  Also, fins 3 that are formed in a wave shape are joined to the flat surfaces on both sides of the tube 2, and the heat transfer area between the air and the air is promoted by the fins 3 by increasing the heat transfer area with the air. . Hereinafter, the substantially rectangular heat exchanging portion including the tube 2 and the fin 3 is referred to as a core portion 4.

  The header tank 5 extends in a direction (vertical direction in the present embodiment) orthogonal to the tube longitudinal direction at the end portion in the tube longitudinal direction (horizontal end portion in the present embodiment) and communicates with the plurality of tubes 2. It is. The header tank 5 includes a core plate 5a to which the tube 2 is inserted and joined, and a tank body 5b that constitutes a tank internal space together with the core plate 5a.

  At both ends of the core portion 4, side plates 6 that extend substantially in parallel with the tube longitudinal direction and reinforce the core portion 4 are provided.

  As shown in FIGS. 1 and 2, the side plate 6 has a base portion 61 that has a surface substantially parallel to the flat surface of the tube 2 and extends substantially parallel to the longitudinal direction of the tube 2, and blown air from the base portion 61. It has a pair of side ribs 62 that project from both ends in the flow direction in a direction substantially perpendicular to the base portion 61 (tube stacking direction) and extend substantially parallel to the tube longitudinal direction.

  A bracket 7 is attached to the side plate 6. The bracket 7 constitutes a connection part for connecting the refrigerant radiator 1 to a vehicle body (not shown), and is configured separately from the refrigerant radiator 1.

  Hereinafter, the structure of the bracket 7 will be described with reference to FIGS. In FIGS. 3 and 4, hatched hatching is applied to a flat portion 72 c described later for convenience.

  As shown in FIGS. 2 and 3, the bracket 7 includes a first fixing portion 71 for fixing the refrigerant radiator 1 to the vehicle body, and two second fixings for fixing the bracket 7 to the refrigerant radiator 1. Part 72. In the present embodiment, one second fixing portion 72 is connected to each side of the first fixing portion 71 in the tube longitudinal direction. Moreover, the 1st fixing | fixed part 71 and the 2nd fixing | fixed part 72 are integrally formed.

  The 1st fixing | fixed part 71 has the plane part 71a orthogonal to the flow direction of blowing air. A through hole 71b penetrating the front and back is formed in a substantially central portion of the flat portion 71a. The bracket 7 is fixed to the vehicle body by inserting a bolt (not shown) through the through hole 71b.

  Moreover, the 1st fixing | fixed part 71 has the rib 71c bent in the perpendicular | vertical direction from the both ends of the tube longitudinal direction (left-right direction of FIG. 3) in the plane part 71a, and extended in the flow direction of blowing air.

  The 2nd fixing | fixed part 72 is substantially orthogonally crossed with respect to the 1st wall part 72a from the 1st wall part 72a extended substantially parallel to the base part 61 of the side plate 6, and the blowing air flow direction both ends of the 1st wall part 72a. It has a pair of 2nd wall part 72b which protrudes in a direction (tube lamination direction), and extends substantially parallel to a tube longitudinal direction.

  The first wall portion 72 a is in contact with the surface of the base portion 61 of the side plate 6 opposite to the core portion 4. The pair of second wall portions 72 b are in contact with the inner side surfaces of the pair of side ribs 62 of the side plate 6 in the air flow direction.

  As shown in FIG. 3 and FIG. 4, among the outer surfaces of the second wall portion 72 b in the air flow direction, the wall surface far from the core portion 4 is joined to the side rib 62 of the side plate 6 by brazing. Yes. That is, in the present embodiment, among the outer surfaces of the second wall portion 72b in the direction of the blown air flow, the wall surface farther from the core portion 4 is a portion farther from the core portion 4 than the base portion 61 in the side plate 6. A flat portion 72c to be joined is configured.

  Cutouts 73 are formed at both ends of the flat wall portion 72c of the second wall portion 72b in the blown air flow direction. In the present embodiment, the notch 73 is formed by cutting off a corner portion on the opposite side of the core portion 4 in the second wall portion 72b.

  Returning to FIG. 2, a protrusion 74 that protrudes toward the inner side (the bracket 7 side) in the blown air flow direction is provided at a portion corresponding to the notch 73 in the side rib 62 of the side plate 6.

  Then, the manufacturing method of the refrigerant | coolant heat radiator 1 of this embodiment is demonstrated.

  First, after the core 3 is temporarily assembled by loading the fins 3 between the plurality of tubes 2 arranged at predetermined intervals and between the tubes 2 and the side plates 6, the core plate 5a of the header tank 5 is temporarily assembled. Each tube 2 and the side plate 6 are inserted into through-holes (not shown) formed in. Thereafter, the tank body 5b is assembled to the core plate 5a. Thereby, temporary fixation (temporary assembly) of each tube 2, the fin 3, the header tank 5, and the side plate 6 is completed.

  Next, this temporarily assembled body is carried into a heating furnace, and the core portion 4 (that is, the tube 2 and the fin 3), the header tank 5 and the side plate 6 are integrally joined by brazing. More specifically, by heating the temporary assembly in a heating furnace, the tube 2, the tank body 5b and the side plate 6 are brazed and joined to the core plate 5a by the brazing material clad on the core plate 5a. The fins 3 are brazed to the outer surface of the tube 2 by the brazing material clad on the surface of the tube 2.

  Next, the bracket 7 is joined to the refrigerant | coolant heat radiator 1 brazed integrally in this way. More specifically, first, after the bracket 7 is disposed between the pair of side ribs 62 of the side plate 6, the portion corresponding to the notch 73 in the side rib 62 is opposite to the core portion 4 in the tube stacking direction (see FIG. The protrusion 74 is formed by pressing from above (2). Thereby, the bracket 7 can be temporarily fixed to the side plate 6.

  Thereafter, the vicinity of the flat surface portion 72 c of the bracket 7 is partially heated, so that the flat surface portion 72 c is brazed and joined to the side rib 62 of the side plate 6 by the brazing material clad on the flat surface portion 72 c. In this way, the refrigerant radiator 1 shown in FIG. 1 is completed.

  As described above, the bracket 7 of the present embodiment has the flat portion 72c joined to the side plate 6, so that the bracket 7 and the side plate 6 are integrally brazed after the component parts of the refrigerant radiator 1 are brazed together. And the bracket 7 can be brazed and joined to the refrigerant radiator 1. At this time, since the flat portion 72c of the bracket 7 is joined to a portion of the side plate 6 that is farther from the core portion 4 than the base portion 61, even if the bracket 7 and the side plate 6 are partially heated. The core portion 4 can be made less likely to be thermally affected.

  Therefore, it is not necessary to braze the bracket 7 integrally with the refrigerant radiator 1, so that there is no restriction on the shape of the bracket 7 due to the space of the heating furnace. For this reason, it becomes possible to improve the design freedom of the bracket 7.

  By the way, when performing brazing joining between different parts, there exists a brazing material length (hereinafter, also referred to as a necessary brazing material length) necessary to make the strength and rigidity between the parts equal to or higher than the required values. Here, as in the heat exchanger described in Patent Document 1 described above, when brazing the bracket to the bottom surface of the side plate, whether the brazing material length satisfies the necessary brazing material length after the brazing process. In order to confirm, it is necessary to disassemble the bracket and the side plate once, which is very complicated.

  On the other hand, in the present embodiment, the bracket 7 is configured to be brazed to the side plate 6 at the flat surface portion 72c of the second wall portion 72b, that is, the end portion on the opposite side to the core portion 4 in the tube stacking direction. ing. For this reason, whether or not the brazing length in the tube longitudinal direction is satisfied in the joint portion of the bracket 7 and the side plate 6, that is, whether or not brazing occurs in the tube longitudinal direction, is determined in the tube stacking direction. This can be confirmed by visual observation from the side opposite to the core part 4 (from the upper side in FIG. 4).

  Moreover, in this embodiment, the notch 73 is provided in the both ends of the blowing air flow direction in the plane part 72c of the 2nd wall part 72b of the bracket 7. As shown in FIG. For this reason, it is determined from the longitudinal direction of the tube whether or not the required brazing length in the tube laminating direction is satisfied at the joint between the bracket 7 and the side plate 6, that is, whether or not brazing occurs in the tube laminating direction. This can be confirmed by visual observation (from the left-right direction in FIG. 4).

  Therefore, in the refrigerant radiator 1 of the present embodiment, it is not necessary to disassemble the bracket and the side plate in order to confirm whether the brazing material length satisfies the necessary brazing material length after the brazing process. Therefore, it is possible to easily confirm whether or not the bracket 7 is brazed to the refrigerant radiator 1 satisfactorily.

  Moreover, when the bracket 7 is brazed to the side plate 6 by providing the protruding portion 74 at a portion corresponding to the notch 73 in the side rib 62 of the side plate 6 as in the present embodiment, the bracket 7 It can be easily temporarily fixed to the plate 6.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment in the shape of the bracket 7.

  As shown in FIG. 5, the bracket 7 of the present embodiment has one first fixing portion 71 and one second fixing portion 72. The second fixing portion 72 is connected to the end portion of the first fixing portion 71 on the side close to the core portion 4 in the tube stacking direction. In addition, the 1st fixing | fixed part 71 of this embodiment does not have the rib 71c.

  The second fixing portion 72 protrudes from the end of the second wall portion 72b opposite to the core portion 4 in the tube stacking direction in a direction substantially perpendicular to the second wall portion 72b (the blowing air flow direction). It has the 3rd wall part 72d extended substantially parallel to a direction.

  The surface of the third wall portion 72d closer to the core portion 4 is joined to the end surface 62a of the side rib 62 of the side plate 6 opposite to the core portion 4 in the tube stacking direction. That is, in the present embodiment, the surface of the third wall portion 72d closer to the core portion 4 constitutes a flat portion 72c that is joined to a portion of the side plate 6 that is farther from the core portion 4 than the base portion 61. ing.

  As described above, the flat surface portion 72c of the bracket 7 according to the present embodiment is joined to a portion of the side plate 6 that is farther from the core portion 4 than the base portion 61. Therefore, the bracket 7 and the side plate 6 are partially connected. Even if it heats automatically, it can make it hard to give a thermal influence to the core part 4. FIG. Therefore, it is possible to obtain the same effect as in the first embodiment.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment is different from the first embodiment in the shape of the second fixing portion 72 of the bracket 7.

  As shown in FIG. 6, the second fixing portion 72 of the bracket 7 of the present embodiment includes a bottom portion 72 e that contacts a base portion of a side plate (not shown), and is parallel to the base portion (perpendicular to the tube stacking direction). A flat plate portion 72f extending in the direction) and a connecting portion 72g connecting the bottom portion 72e and the flat plate portion 72f.

  In the present embodiment, both end surfaces of the bottom portion 72e, the flat plate portion 72f, and the connection portion 72g in the blowing air flow direction are in contact with inner wall surfaces of the pair of side ribs (not shown) in the blowing air flow direction. Moreover, the bottom part 72e, the flat plate part 72f, and the connection part 72g are integrally formed.

  The flat plate portion 72f is disposed on the side farther from the core portion (not shown) in the tube stacking direction than the bottom portion 72e. Both end surfaces of the flat plate portion 72f in the blowing air flow direction are joined to the inner wall surfaces of the pair of side ribs of the side plate in the blowing air flow direction by brazing. In other words, in the present embodiment, both end surfaces of the flat plate portion 72f in the air flow direction constitute a flat portion 72c joined to a portion of the side plate that is farther from the core portion than the base portion.

  As described above, the flat surface portion 72c of the bracket 7 according to the present embodiment is joined to a portion of the side plate 6 that is farther from the core portion 4 than the base portion 61. Therefore, the bracket 7 and the side plate 6 are partially connected. Even if it heats automatically, it can make it hard to give a thermal influence to the core part 4. FIG. Therefore, it is possible to obtain the same effect as in the first embodiment.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be variously modified as follows without departing from the spirit of the present invention.

  (1) In the said 1st Embodiment, although the notch 73 was demonstrated about the example formed in the plane part 72c of the 2nd wall part 72b, not only this but as shown in FIG. You may form in the edge part near the 1st wall part 72a in the 2nd wall part 72b, ie, the side close | similar to the core part 4. FIG. Even in this case, whether or not the necessary brazing length in the tube stacking direction is satisfied at the joint portion between the bracket 7 and the side plate 6 can be confirmed by visual observation from the tube longitudinal direction.

  (2) The above-described embodiments may be appropriately combined within a feasible range. For example, as shown in FIG. 8, the bracket 7 according to the first embodiment (the bracket 7 in which the second fixing portions 72 are provided on both sides of the first fixing portion 71 in the longitudinal direction of the tube) is the second embodiment. The configuration of the two fixing portions 72 may be applied.

  (3) In the above embodiment, an example in which the heat exchanger of the present invention is applied to the refrigerant radiator 1 has been described. However, the present invention can also be applied to other heat exchangers such as a refrigerant evaporator and a radiator. .

1 Refrigerant radiator (heat exchanger body)
2 Tube 4 Core 6 Side plate 7 Bracket (Connecting parts)
61 Base part 72c Plane part 73 Notch

Claims (5)

A core portion (4) configured by stacking and arranging a plurality of tubes (2) through which a heat medium flows, and for exchanging heat between the heat medium and an external fluid flowing around the tubes (2), and the core A heat exchanger main body (1) having a side plate (6) joined to the core (4) and disposed at an end of the part (4);
A connecting component (7) for connecting the heat exchanger body (1) and other components ;
The side plate (6) has a base portion (61) extending substantially parallel to the longitudinal direction of the tube (2),
The core portion (4) is joined to one surface of the base portion (61),
The connection component (7) has a flat portion (72c) that is joined to a portion of the side plate (6) that is farther from the core portion (4) than the base portion (61).
The flat part (72c) is a method of manufacturing a heat exchanger in which a notch (73) is provided ,
A temporary assembling step of temporarily assembling the heat exchanger body (1);
An integral brazing step of integrally brazing the heat exchanger body (1) temporarily assembled in the temporary assembly step;
A temporary fixing step of temporarily fixing the connection component (7) to the side plate (6) of the heat exchanger body (1) integrally brazed in the integral brazing step;
After the temporary fixing step, the core part (4) is more than the base part (61) in the side plate (6) by partially heating the flat part (72c) of the connection component (7). And a connecting part brazing step for brazing the portion far from the flat portion and the flat portion (72c) . The side plate (6) has a pair of ribs (62) extending from both ends of the base portion (61) in the flow direction of the external fluid toward the side far from the core portion (4). ,
The method for manufacturing a heat exchanger according to claim 1, wherein the connection component (7) is disposed between the pair of ribs (62). The plane part (72c) of the connection part (7) is joined to the inner surface of the side plate (6) in the flow direction of the external fluid in the rib (62),
A projecting portion (74) projecting inward in the flow direction of the external fluid is formed at a portion of the rib (62) corresponding to the notch (73) of the connection component (7). The manufacturing method of the heat exchanger of Claim 2 characterized by the above-mentioned. The heat exchange according to any one of claims 1 to 3, wherein a brazing material is clad on a surface of the connecting component (7) on the side to be joined to the side plate (6). Manufacturing method . The said connection component is the bracket (7) which connects the said heat exchanger main-body part (1) and a vehicle, The manufacturing method of the heat exchanger as described in any one of Claim 1 thru | or 4 characterized by the above-mentioned. .

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