WO2018216436A1 - Heat exchanger - Google Patents

Abstract

In this heat exchanger (100), a first plate (20a, 20b) has: a first edge part (27) that extends from an end part of a base part (21) in a second direction perpendicular to a first direction; a first side surface part (28) which is formed so as to be bent from the first edge part (27) and has a first side surface; and a positioning part (24) that is provided by being connected to an end part (25a, 25b) so as to be aligned with the first edge part (27) in the first direction, and that enters into a recessed part (34) and positions the first plate (20a, 20b) and a second plate (30a, 30b) in the second direction.

Description

Heat exchanger

The present invention relates to a heat exchanger.

JP2014-214955A discloses a heat exchanger that performs heat exchange between a first fluid that is a gas and a fluid that is a liquid lower in temperature than the first fluid. In the heat exchanger described in JP2014-214955A, an intake flow path forming member that covers a core portion is configured by brazing a plurality of plates, and a plurality of plates that constitute a tank portion are brazed to the intake flow path forming member. It is composed by attaching.

In the invention described in JP2014-214955A, the end portions of two plates having a substantially U-shaped cross section are brought into contact with each other to form a casing. For this reason, it is necessary to prepare a U-shaped plate in advance, and the positional accuracy of the U-shaped tip is required. For this reason, the productivity was not good.

This invention aims at improving productivity in a heat exchanger.

According to an aspect of the present invention, the heat exchanger houses a heat exchange unit that exchanges heat between the first fluid that circulates outside and the second fluid that circulates inside, and the heat exchange unit. A cylindrical main body having a cylindrical portion and an opening through which the first fluid flows, and the cylindrical portion includes a first rectangular plate having a first side surface forming a part of an outer edge of the opening. A rectangular second plate having a second side surface forming a part of the outer edge of the opening and a recess into which the first end of the first plate in the first direction enters, the first plate being a flat plate -Shaped base portion, a first edge portion extending from an end portion in a second direction orthogonal to the first direction of the base portion, and a first side surface portion formed so as to be bent from the first edge portion and having a first side surface And continuously provided at the first end so as to be aligned with the first edge in the first direction, enter the recess and enter the second direction. Having a positioning portion for positioning the definitive first plate and the second plate.

Moreover, according to another aspect of the present invention, the heat exchanger includes a heat exchanging unit for exchanging heat between the first fluid flowing outside and the second fluid flowing inside, and the heat exchanging unit. A cylindrical main body rod having a cylindrical portion to be accommodated and an opening through which the first fluid flows, and the cylindrical portion is a rectangular first having a first side surface forming a part of the outer edge of the opening. A plate, and a rectangular second plate having a second side surface forming a part of the outer edge of the opening and a concave portion into which the first end of the first plate in the first direction enters, the first plate is A flat first base portion, a first edge portion extending from an end portion of the first base portion in a second direction orthogonal to the first direction, and a first side surface formed so as to be bent from the first edge portion. A second side plate having a flat plate-like second base portion, and a second base portion protruding from the second base portion, 2 and a base portion that forms a recess together with the base portion, and when the first end portion of the first plate enters the recess portion of the second plate, the end surface of the first side surface portion in the first direction rises. It abuts on the opening side end surface of the concave portion of the contact portion.

According to these aspects, since the main body is formed by combining the rectangular first plate and the rectangular second plate, the structure is simpler than when a U-shaped plate is used. Can improve productivity.

FIG. 1 is a perspective view showing a heat exchanger according to an embodiment of the present invention. FIG. 2 is a perspective view showing the heat exchanger in an exploded state. FIG. 3 is an enlarged view of the vicinity of the positioning portion and the claw portion. FIG. 4 is an enlarged view of the vicinity of the opening. FIG. 5 is a cross-sectional view of the vicinity of the opening. FIG. 6 is a perspective view showing a state in which a pair of plates, fins, and tubes are stacked. FIG. 7 is a perspective view showing the intermediate assembly. FIG. 8 is a perspective view showing the intermediate assembly. FIG. 9 is a perspective view showing the intermediate assembly. FIG. 10 is an enlarged view of the vicinity of the claw portion and the pressure contact portion. FIG. 11 is an enlarged view of the vicinity of the positioning portion. 12 is a cross-sectional view taken along line XII-XII in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The heat exchanger 100 shown in FIG. 1 is used as, for example, a water-cooled charge air cooler that cools intake air supercharged to an engine (not shown) with a coolant (medium).

The heat exchanger 100 includes a cylindrical main body 5 to which the first cover member 3 and the second cover member 4 having an inflow port 3a and an outflow port 3b are attached, and openings 5a and 5b ( 7) and a pair of ducts 6 and 7 connected to each other via the frame body 40, and a core 2 (see FIG. 2 and the like) as a heat exchanging part housed in the main body 5. .

The intake pipes (not shown) of the engine are connected to the ducts 6 and 7. During operation of the engine, intake air flows from one duct 6 through the main body 5 into the core 2 through the intake pipe. The intake air flowing through the core 2 is cooled by releasing heat to the coolant flowing through the core 2. The intake air thus cooled by the heat exchanger 100 is drawn into the engine from the other duct 7 through the intake pipe.

A pipe (not shown) through which the coolant circulates is connected to the inflow port 3a and the outflow port 3b connected to the core 2. During operation of the engine, the coolant sent from the pump (not shown) through the pipe flows into the core 2 through the inflow port 3a. The coolant that flows through the core 2 and exchanges heat flows out from the outflow port 3b. The coolant that has flowed out of the heat exchanger 100 in this manner is guided to a radiator (not shown) through a pipe, radiated to the outside air by the radiator, and then sucked into the pump to circulate.

Next, the core 2 will be described. The core 2 performs heat exchange between the intake air as the first fluid flowing outside and the coolant as the second fluid flowing inside.

As shown in FIG. 2, the core 2 includes a plurality of tubes 9 as flow path forming portions and fins 8 interposed between the tubes 9. The fins 8 and the tubes 9 are alternately stacked, and a flow path through which intake air flows is formed between the fins 8 and the tubes 9. In the heat exchanger 100 of this embodiment, the tube 9 is provided so as to be orthogonal to the flow direction of intake air. Since the core 2 includes the fins 8, the contact area between the outer surface of the tube 9 and the intake air can be increased. Note that the core 2 may not include the fins 8 as long as only the tubes 9 are stacked via a space.

Hereinafter, description will be made by setting three axes X, Y, and Z orthogonal to each other in each drawing. In the core 2, the flow direction in which the intake air flows through the flow path between the fin 8 and the tube 9 is referred to as “X-axis direction” or “second direction”, and the flow width direction in which the tube 9 extends is referred to as the “Y-axis”. The direction in which the tubes 9 are stacked is referred to as the “Z-axis direction”.

The tube 9 is configured by a flat cylindrical member that opens in the flow channel width direction (Y-axis direction) and extends in the flow channel direction (X-axis direction). The tube 9 is formed of a metal material having good thermal conductivity. The shape of the tube 9 may be any shape, for example, a pipe having a circular cross section or a configuration in which a channel is formed between two plates.

The main body 5 includes a cylindrical portion 5c that accommodates the core 2, and openings 5a and 5b that are provided at both ends of the cylindrical portion 5c and through which intake air flows (see FIG. 7 and the like). The cylinder portion 5c is configured by combining plates 20a and 20b as a pair of first plates and plates 30a and 30b as a pair of second plates.

The plates 20a and 20b are formed of a rectangular metal plate such as aluminum. Since the plates 20a and 20b have the same shape, only the plate 20a will be described below, and description of the plate 20b will be omitted.

As shown in FIGS. 2 and 3, the plate 20a includes a flat base portion 21 as a first base portion, a first edge portion 27 extending from an end portion of the base portion 21 in the X-axis direction, and a first edge. The first side surface portion 28 is formed so as to be bent from the portion 27 and has side surfaces 22a and 22b as first side surfaces, and the Y-axis direction of the plate 20a is aligned with the first edge portion 27 in the Y-axis direction. It is provided continuously to the end portions 25a and 25b as the first end portions, and enters the concave portions 34 of the plates 30a and 30b described later to position the plates 20a and 30a and 30b in the X-axis direction (second direction). Positioning unit 26 to perform. The side surfaces 22a and 22b are formed at both ends in the X-axis direction, and form part of the outer edges of the openings 5a and 5b, respectively.

The positioning portions 26 are formed at both ends of the Y-axis direction end portions 25a and 25b of the plate 20a, that is, at the four corners of the plate 20a. The positioning portion 26 is provided inward of the first side surface portion 28 in the X-axis direction. Specifically, the positioning part 26 is formed as follows.

First, incisions C (see FIGS. 3 and 11) having a predetermined length in the X-axis direction are made by shearing or the like in the vicinity of both ends of the end portion in the X-axis direction of the flat plate (plate 20a). Then, the positioning part 26 and the first side face part 28 are formed so as to be aligned in the Y-axis direction by bending the parts separated by the cuts C in the Z-axis direction. In addition, the distance between the positioning parts 26 located at both ends in the X-axis direction is formed to be shorter than the distance between the side surface 22a and the side surface 22b. More specifically, the positioning portion 26 will be described later with respect to the side surfaces 22a and 22b of the plates 20a and 20b and the plates 30a and 30b when the Y-axis end portions 25a and 25b of the plates 20a and 20b are assembled to the recess 34. The side surfaces 32a and 32b are formed so as to be positioned on the same plane, that is, to be shortened by the thickness of the plates 30a and 30b. The position of the end surface in the Z-axis direction of the positioning portion 26 is formed to be substantially equal to the position of the end surface in the Z-axis direction of the first side surface portion 28 by cutting the end portion.

Further, the width of the cut C, specifically, the first end surface 27A in the Y-axis direction (first direction) of the first edge portion 27, the second end surface 26A of the positioning portion 26 facing the first end surface 27A, The interval G (see FIG. 12) is preferably 0. This prevents the brazing material melted during brazing from flowing through the notch C (the gap between the first end surface 27A and the second end surface 2A) into the interior of the plates 20a and 20b. The molten brazing material can be retained at the joint B (see FIG. 12) between the one edge portion 27 and the plates 30a and 30b. In addition, if the space | interval G is 0.5 mm or less, a brazing material can be made to remain in the junction part B with the viscosity and surface tension of a brazing material.

The first side surface portion 28 is provided with a claw portion 23 extending in the flow direction of the intake air (X-axis direction), and the frame body 40 is provided continuously with the claw portion 23 and is bent along the frame body 40. And a press-contact portion 24 that presses against the openings 5a and 5b (see FIG. 3). The press contact portion 24 has a tapered surface 24a facing the side surfaces 22a and 22b. The distance from the side surfaces 22 a and 22 b to the tapered surface 24 a of the press contact portion 24 is formed to be shorter than the plate thickness of the frame body 40. Specific actions of the claw portion 23 and the pressure contact portion 24 will be described later.

The plates 30a and 30b are formed of a substantially rectangular metal plate such as aluminum. Since the plates 30a and 30b have the same shape except that a later-described partition wall 36 is provided on the plate 30a, only the plate 30a will be described below, and description of the plate 30b will be omitted.

The plate 30a includes a flat base portion 31 as a second base portion, a standing portion 31A that protrudes from an outer edge portion of the base portion 31 and forms a recess 34 together with the base portion 31, and outer edges of the openings 5a and 5b, respectively. The side surfaces 32a and 32b as the second side surfaces forming a part thereof, the side surfaces 33a and 33b as the third side surfaces formed at both ends in the Z-axis direction in FIG. 2, and the end portions of the tubes 9 are inserted. A plurality of through holes 35. The side surfaces 32a and 32b and the side surfaces 33a and 33b are side surfaces of the standing portion 31A.

The standing portion 31A (side surfaces 32a and 32b and side surfaces 33a and 33b) of the plate 30a is formed by bending the outer edge portion of the base portion 31. The side surfaces 32a and 32b constitute end surfaces on the side of the openings 5a and 5b.

The plate 30a has claw portions 38 formed on the side surfaces 32a and 32b and extending in the X-axis direction. The plate 30a is provided continuously with the claw portions 38 and is bent along the frame body 40 so that the frame body 40 is opened. A pressure contact portion 39 that is in pressure contact with 5a and 5b. When the plates 20a and 20b and the plates 30a and 30b are combined, the end portions 25a and 25b in the Y-axis direction of the plates 20a and 20b enter the recess 34 (see FIG. 11). The pressure contact portion 39 has a tapered surface 39a facing the side surfaces 32a and 32b. The distance from the side surfaces 32 a and 32 b to the tapered surface 39 a of the pressure contact portion 39 is formed to be shorter than the plate thickness of the frame body 40. The claw portion 38 and the pressure contact portion 39 are formed in the same shape as the claw portion 23 and the pressure contact portion 24 (see FIG. 3) of the plates 20a and 20b.

The first cover member 3 is attached to the plate 30 a so as to face the base portion 31, and the second cover member 4 is attached to the plate 30 b so as to face the base portion 31.

The first cover member 3 and the second cover member 4 are formed of a metal plate such as aluminum. The first cover member 3 and the second cover member 4 include a plurality of locking claws 3c and 4c as locking portions provided at intervals on both ends in the Z-axis direction. The first cover member 3 and the second cover member 4 have the locking claws 3c and 4c at the level difference formed at the overlapping portion between the end portions 25a and 25b of the plates 20a and 20b and the standing portion 31A of the plates 30a and 30b. To be locked, specifically, it is attached by locking to a notch 37 provided in the standing portion 31A of the plates 30a, 30b.

When the first cover member 3 is attached to the plate 30a, the space S in which the coolant stays between the recess 3d of the first cover member 3 and the base portion 31 of the plate 30a (see FIGS. 8 and 9). Is formed. Further, by attaching the second cover member 4 to the plate 30b, a space S3 in which the cooling liquid stays is formed between the concave portion 4a of the second cover member 4 and the base portion 31 of the plate 30b. Thus, the 1st cover member 3 and the 2nd cover member 4 function as a tank part by attaching to plate 30a, 30b.

The plate 30a further includes a partition wall 36 that partitions the space S into a space S1 that communicates with the inflow port 3a and a space S2 that communicates with the outflow port 3b. As a result, the coolant flowing in from the inflow port 3a flows into the space S3 through the space S1 and the tube 9, and then flows out from the outflow port 3b through the tube 9 and the space S2.

The frame body 40 is formed of a plate-like metal member and includes a substantially rectangular annular frame portion 41. The frame 41 has an annular contact surface 41a that contacts the openings 5a and 5b of the main body 5 (the plates 20a and 20b and the side surfaces 22a, 22b, 32a and 32b of the plates 30a and 30b) (see FIG. 5 and the like). ).

The frame body 40 further includes a plurality of outer engaging portions 42 protruding from the outer peripheral end of the frame portion 41. As shown in FIG. 2 and the like, the outer engaging portions 42 protrude so as to face the outer surfaces of the ducts 6 and 7 that are accommodated on the inner peripheral side of the frame portion 41, and are arranged at a predetermined interval. The outer engagement portion 42 is caulked (bent) to crimp and connect the frame body 40 and the ducts 6 and 7 assembled to the frame portion 41.

Each member of the fin 8, the plates 20a and 20b, the plates 30a and 30b, the first cover member 3, the second cover member 4, and the frame body 40 is formed by press-molding a metal plate such as aluminum. . The tube 9 is also made of a metal such as aluminum. For each of these members, a clad material in which a brazing material and a flux are applied to the joint surface is used.

Next, the assembly process of the heat exchanger 100 will be described.

First, the fins 8 and the tubes 9 are alternately stacked between the plates 20a and 20b (see FIG. 6).

Subsequently, the laminate 60 in which the plate 20a, the tube 9, the fin 8, and the plate 20b are laminated is assembled to the plates 30a and 30b. Specifically, the laminated body 60 and the plates 30a and 30b are assembled so that the end portions 25a and 25b of the plates 20a and 20b positioned at both ends of the laminated body 60 are inserted into the concave portions 34 of the plates 30a and 30b, respectively. (See FIGS. 7 and 4). At this time, the plate 20a until the end surfaces 28a, 28b (see FIGS. 3, 4, and 11) in the Y-axis direction of the first side surface portion 28 contact the end surface 31B of the standing portion 31A on the opening side of the recess 34. , 20b are inserted into the recesses 34 of the plates 30a, 30b, respectively. At this time, the end portions of the tubes 9 are inserted into the through holes 35 provided in the plates 30a and 30b. Thereby, the intermediate assembly 50 is formed (see FIG. 7).

At this time, since the positioning portion 26 also enters the recess 34, the positioning portion 26 causes the positional deviation in the X-axis direction between the plates 20a, 20b and the plates 30a, 30b, specifically, the plates constituting the openings 5a, 5b. It is possible to prevent displacement (generation of a step) between the side surfaces 22a and 22b of 20a and 20b and the side surfaces 32a and 32b of the plates 30a and 30b. Thereby, since it can prevent that a clearance gap produces between opening part 5a, 5b and the frame 40, the brazing defect and fluid leakage of this location can be prevented.

When the laminated body 60 is assembled to the plates 30a and 30b, the laminated body 60 is compressed in the laminating direction, that is, with the fins 8 and the tubes 9 laminated alternately between the plates 30a and 30b, It inserts in the recessed part 34 of plate 30a, 30b. By assembling in this way, the laminated body 60 and the plates 30a and 30b can be maintained in an assembled state by the elastic force of the tube 9 and the fins 8.

Next, the first cover member 3 and the second cover member 4 are attached to the intermediate assembly 50. Specifically, the locking claws 3c and 4c of the first cover member 3 and the second cover member 4 are locked to the notches 37 provided in the standing portions 31A of the plates 30a and 30b. Thereby, the intermediate assembly 51 is formed (see FIG. 8). In the present embodiment, the configuration in which the locking claws 3c and 4c are locked to the notch 37 is described as an example, but the notch 37 may not be provided. In this case, the locking claws 3c and 4c are locked to a step formed at an overlapping portion between the end portions 25a and 25b of the plates 20a and 20b and the standing portion 31A of the plates 30a and 30b.

Subsequently, the frame body 40 is attached to the intermediate assembly 51. Specifically, the frame body 40 is placed so as to be in contact with the openings 5a, 5b (side surfaces 22a, 22b, 32a, 32b) at both ends of the main body 5. In this state, the front end portions (pressure contact portions 24) of the claw portions 23 and 38 are bent along the frame body 40 so that the front end side faces outward of the openings 5a and 5b (see FIG. 10). When the tip portions (press contact portions 24, 39) of the claw portions 23, 38 are bent toward the outside of the openings 5a, 5b, the tapered surfaces 24a, 39a of the press contact portions 24, 39 contact the frame body 40. Touch.

When the pressure contact portions 24 and 39 are further bent from this state, the frame body 40 is pressed against the openings 5a and 5b (side surfaces 22a, 22b, 32a, and 32b) due to the wedge effect of the tapered surfaces 24a and 39a. Thus, the side face 22a, 22b, 32a, 32b comes to be located on the same plane mutually by the frame body 40 being press-contacted. Thereby, the intermediate assembly 52 is formed (see FIG. 9).

When the claw portions 23 and 38 and the press contact portions 24 and 39 are not provided, the frame body 40 is attached to the openings 5 a and 5 b of the main body portion 5 using a band or a jig when the frame body 40 is joined. Must be kept attached. For this reason, it is necessary to perform attachment / detachment work of a band, a jig, etc., and the assemblability deteriorates.

Therefore, the heat exchanger 100 of the present embodiment is provided with the claw portions 23 and 38 and the pressure contact portions 24 and 39. Thus, the pressure contact portions 24 and 39 are bent along the frame body 40 in a state where the frame body 40 is placed in contact with the openings 5a and 5b, so that the frame can be used without using a band or a jig. The body 40 can be held in a state of being pressed against the openings 5a and 5b. Therefore, the assemblability of the heat exchanger 100 is improved.

The intermediate assembly 52 assembled in this manner is carried into a heating furnace (not shown) and subjected to heat treatment. Thereby, the brazing material between the members in the intermediate assembly 52 is melted, and the members are brazed.

Since the curvature radius of the bent part extending from the first edge portion 27 of the plates 20a, 30b to the first side surface portion 28 is different from the curvature radius of the corner portion D of the plates 30a, 30b, a gap is generated in the region R shown in FIG. Cheap. And at the time of the above-mentioned heat processing, there exists a possibility that the fuse | melted brazing material may flow down into the inside of the main-body part 5 through the clearance gap of the area | region R, and the notch | incision C, and this clearance gap cannot be closed by brazing. If the gap cannot be prevented in this way, fluid from the inside of the heat exchanger 100 may leak.

Therefore, in the heat exchanger 100 of the present embodiment, the gap G between the first end surface 27A of the first edge portion 27 and the second end surface 26A of the positioning portion 26 is formed to be 0.5 mm or less. As a result, the molten brazing material can remain at the joint B by the surface tension, so that brazing can be performed reliably. Note that the smaller the gap G is, the more the molten brazing material can stay at the joint B. Further, if the gap G is 0 (zero), that is, if there is no gap, the molten brazing material can surely stay at the joint B.

Further, by forming the gap G between the positioning portion 26 and the second end surface 26A to be 0.5 mm or less, the end surfaces 28a and 28b of the first side surface portion 28 are not in contact with the plates 30a and 30b. However, since the molten brazing material can remain at the joint B, a brazing defect can be reliably avoided.

Thereafter, the ducts 6 and 7 are attached to the brazed intermediate assembly 52. Specifically, in a state where the ducts 6 and 7 are assembled to the frame portion 41 of the frame body 40, the outer engagement portion 42 is bent toward the inside of the openings 5a and 5b. As a result, the frame body 40 and the ducts 6 and 7 are caulked and the heat exchanger 100 is completed.

In the heat exchanger 100 configured as described above, the intake air flowing from the duct 6 flows through the space between the tube portion 5c and the tube 9 or the space between the adjacent tubes 9 while the tube 9 By contacting the outer surface, heat exchange is performed with the coolant flowing through the inside of the tube 9. That is, the high-temperature intake air flowing in from the duct 6 is cooled by the heat exchange part (core 2), then discharged from the duct 7, and supplied to an engine (not shown). On the other hand, the coolant flowing in from the inflow port 3a exchanges heat with the intake air in the tube 9, absorbs the heat of the intake air, and then is discharged from the outflow port 3b. The coolant discharged from the outflow port 3b is cooled by a cooling device such as a radiator (not shown) and then flows into the inflow port 3a again.

According to the heat exchanger 100 of the present embodiment configured as described above, the following effects can be obtained.

In the heat exchanger 100, the cylindrical portion 5c includes a rectangular first plate (plates 20a and 20b) having first side surfaces (side surfaces 22a and 22b) that form part of outer edges of the openings 5a and 5b, and an opening portion. 2nd side surface (32a, 32b) which forms a part of outer edge of 5a, 5b, and 1st end part (end part 25a, 25b) of the 1st direction (Y-axis direction) of 1st plate (plate 20a, 20b) And a rectangular second plate (plates 30a, 30b) having a recess 34 into which is inserted. The first plate (plates 20a and 20b) is a flat base portion 21 and a second portion extending from an end portion of the base portion 21 in the second direction (X-axis direction) orthogonal to the first direction (Y-axis direction). 1st edge part 27, 1st side part 28 formed so that it may be bent from 1st edge part 27, and having the 1st side surface (side 22a, 22b), and the 1st edge in the 1st direction (Y-axis direction) The first plate (plates 20a, 20b) and the second plate in the second direction (X-axis direction) are provided continuously to the first end (ends 25a, 25b) so as to be aligned with the portion 27, and enter the recess 34. And a positioning portion 26 for positioning with the plates (plates 30a and 30b).

Since the main body 5 is formed by combining the rectangular first plate (plates 20a, 20b) and the rectangular second plate (plates 30a, 30b), compared to the case of using a U-shaped plate, A simple structure can be obtained, and productivity is improved. Moreover, since the heat exchanger 100 does not use a conventional side plate, the number of parts can be reduced.

Furthermore, in the configuration in which the ends of the U-shaped plates are abutted with each other, the positional accuracy of the tip of the U-shaped plate is required, and the workability cannot be said to be good. On the other hand, in the heat exchanger 100, the rectangular plates are assembled with each other, and the first end portions (end portions 25a and 25b) of the first plates (plates 20a and 20b) enter the recess 34. For this reason, compared with the structure which abuts the edge part of U-shaped plates, since the processing precision of a plate is not required, a process can be simplified. Therefore, productivity is improved.

Further, the positioning portion 26 enters the recess 34 and positions the first plate (plates 20a and 20b) and the second plate (plates 30a and 30b) in the second direction (X-axis direction). Misalignment can be prevented.

In the heat exchanger 100, the positioning portion 26 is provided inward of the first side surface portion 28 in the second direction (X-axis direction). In addition, when the positioning portion 26 enters the recess 34, the positioning member 26 uses a brazing material that joins between the first edge portion 27 of the first plate (plates 20a and 20b) and the second plate (plates 30a and 30b). One plate (plates 20a and 20b) is allowed to stay at the junction B between the first edge 27 and the second plate (plates 30a and 30b).

The positioning unit 26 enters the recess 34 and positions the first plate (plates 20a and 20b) and the second plate (plates 30a and 30b) in the second direction (X-axis direction) and the first plate (plate 20a, 20b), the first edge 27 of the first plate (plates 20a, 20b) and the second plate (plate) are joined together between the first edge 27 of the second plate (plates 30a, 30b). 30a, 30b). Thereby, while preventing the position shift of plates, the brazing defect can be suppressed.

In the heat exchanger 100, the distance between the first end surface 27A in the first direction of the first edge portion 27 and the second end surface 26A of the positioning portion 26 facing the first end surface 27A is 0.5 mm or less.

If the distance between the first end surface 27A and the second end surface 26A is 0.5 mm or less, the molten brazing material passes between the first end surface 27A and the second end surface 26A due to the viscosity or surface tension of the brazing material. The molten brazing material is retained at the joint B between the first edge 27 of the first plate (plates 20a and 20b) and the second plate (plates 30a and 30b). be able to. Further, by setting the distance between the first end face 27A and the second end face 26A to 0.5 mm or less, a dimensional error in processing can be allowed to some extent.

In the heat exchanger 100, no gap is formed between the first end face 27A and the second end face 26A.

In this configuration, the distance between the first end face 27A and the second end face 26A is zero. Thereby, it is possible to reliably prevent the molten brazing material from flowing into the interior through the space between the first end surface 27A and the second end surface 26A, and the first edge of the first plate (plates 20a, 20b). The molten brazing material can be retained at the joint B between the portion 27 and the second plate (plates 30a, 30b).

In the heat exchanger 100, the flow path forming portion is alternately laminated with the fins 8 between the pair of first plates (plates 20a, 20b), and a plurality of tubes in which a brazing material is applied to the joint surfaces with the fins 8. 9, the laminated body 60 in which the first plate (plates 20a, 20b), the tube 9, and the fins 8 are laminated is a concave portion of the second plate (plates 30a, 30b) in a compressed state in the lamination direction. 34.

When the laminated body 60 is assembled to the second plate (plates 30a, 30b), the laminated body 60 is inserted into the concave portion 34 of the second plate (plates 30a, 30b) in a state compressed in the laminating direction. By assembling in this way, the laminated body 60 and the second plate (plates 30a, 30b) can be maintained in an assembled state by the elastic force of the tubes 9 and the fins 8. Further, by temporarily assembling in this way, the position of each member is maintained even after brazing (after the brazing material is melted), so that the positioning accuracy of each part is improved.

The heat exchanger 100 is further provided with a first cover member 3 attached to the cylindrical portion 5c and having an inflow port 3a for guiding the coolant to the tube 9 and an outflow port 3b for discharging the coolant from the tube 9. The cylinder portion 5c further includes a step formed at the overlapping portion between the plates 20a, 20b and the plates 30a, 30b, and the tank portion has a locking claw 3c locked at the step provided at the overlapping portion. Have.

According to this structure, the 1st cover member 3 latches the latching claw 3c in the level | step difference formed in the overlap part of edge part 25a, 25b of plate 20a, 20b and standing part 31A of plate 30a, 30b. Only by doing, the 1st cover member 3 can be hold | maintained in the state attached to the cylinder part 5c. Therefore, the productivity of the heat exchanger 100 is improved.

In the heat exchanger 100, the cylindrical portion 5 c is provided on the claw portions 23 and 38 that extend in the flow direction of the intake air from the end surfaces on the openings 5 a and 5 b side, and the claw portions 23 and 38, and extends along the frame body 40. And press contact portions 24 and 39 that press the frame body 40 against the openings 5a and 5b by being bent.

According to this configuration, the pressure contact portions 24 and 39 are bent along the frame body 40 without using a band or a jig, so that the frame body 40 is held in pressure contact with the openings 5a and 5b. Can improve productivity. Further, since the frame body 40 is pressed against the openings 5a and 5b, when the frame body 40 is attached to the openings 5a and 5b, between the openings 5a and 5b and the contact surface 41a of the frame body 40. A gap can be prevented from being formed. Thereby, it is possible to prevent the intake air flowing through the main body 5 from leaking.

Further, in the heat exchanger 100, the press contact portions 24, 39 have tapered surfaces 24a, 39a facing the frame body 40, and the frame body 40 has openings 5a, 5b by contacting the tapered surfaces 24a, 39a. Pressure contacted.

According to this configuration, the frame body 40 can be pressed against the openings 5a and 5b with a large force due to the wedge effect of the tapered surfaces 24a and 39a. Thereby, the leakage of the intake air flowing through the main body 5 can be reliably prevented.

In the heat exchanger 100, the frame body 40 is formed of a plate-like member, and the distance from the end surface on the opening 5a, 5b side of the cylindrical portion 5c to the press contact portions 24, 39 is larger than the plate thickness of the frame body 40. Set short.

According to this configuration, the frame body 40 can be reliably brought into pressure contact with the end faces of the cylindrical portion 5c on the openings 5a and 5b side by the pressure contact portions 24 and 39.

In the heat exchanger 100, the cylindrical portion 5c includes a rectangular first plate (plates 20a and 20b) having first side surfaces (side surfaces 22a and 22b) that form part of outer edges of the openings 5a and 5b, and an opening portion. 2nd side surface (32a, 32b) which forms a part of outer edge of 5a, 5b, and 1st end part (end part 25a, 25b) of the 1st direction (Y-axis direction) of 1st plate (plate 20a, 20b) And a rectangular second plate (plates 30a, 30b) having a recess 34 into which is inserted. The first plate (plates 20a and 20b) is a flat base portion 21 and a second portion extending from an end portion of the base portion 21 in the second direction (X-axis direction) orthogonal to the first direction (Y-axis direction). 1 edge part 27 and the 1st side part 28 which is formed so that it may be bent from the 1st edge part 27, and has 1st side surface (side surface 22a, 22b). The second plate (plates 30 a and 30 b) includes a flat base portion 31, and a standing portion 31 </ b> A that protrudes from the base portion 31 and forms a recess 34 together with the base portion 31. When the first end portions (end portions 25a and 25b) of the first plate (plates 20a and 20b) enter the concave portion 34 of the second plate (plates 30a and 30b), the first direction of the first side surface portion 28 ( The end surface in the (Y-axis direction) is in contact with the end surface 31B on the opening side of the recess 34 of the standing portion 31A.

In this configuration, the main body 5 is formed by combining the rectangular first plate (plates 20a, 20b) and the rectangular second plate (plates 30a, 30b), so that a U-shaped plate is used. Compared to the above, the structure can be simplified, and the productivity is improved. Moreover, since the heat exchanger 100 does not use a conventional side plate, the number of parts can be reduced.

Furthermore, when the first end portion (end portions 25a, 25b) enters the recess 34 of the second plate (plate 30a, 30b), the end surface 28a in the first direction (Y-axis direction) of the first side surface portion 28, Since 28b contacts the end surface 31B of the standing part 31A on the opening side of the recess 34, the plates can be easily positioned.

Further, in the configuration in which the ends of the U-shaped plates are abutted with each other, the position accuracy of the tip of the U-shaped plate is required, and it cannot be said that the workability is good. On the other hand, in the heat exchanger 100, the rectangular plates are assembled with each other, and the first end portions (end portions 25a and 25b) of the first plates (plates 20a and 20b) enter the recess 34. For this reason, compared with the structure which abuts the edge part of U-shaped plates, since the processing precision of a plate is not required, a process can be simplified. Therefore, productivity is improved.

In the heat exchanger 100, the first side surface (22a, 22b) of the first plate (plate 20a, 20b) and the second side surface (32a, 32b) of the second plate (plate 30a, 30b) are on the same plane. Is provided.

By providing the first side surface (22a, 22b) and the second side surface (32a, 32b) on the same plane, it is ensured that fluid leaks from between the frame body 40 when the frame body 40 is attached. Can be prevented.

The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

In the above-described embodiment, the end portions 25a and 25b of the plates 20a and 20b have been described as an example of entering the recess 34 of the plates 30a and 30b. However, the end portions of the plates 30a and 30b are formed on the plates 20a and 20b. You may comprise so that it may enter into a recessed part. In this case, the plates 20a and 20b correspond to the second plate, and the plates 30a and 30b correspond to the first plate.

In the above embodiment, the case where the heat exchanger 100 is used in a charge air cooler mounted on a vehicle has been described as an example. However, the present invention is not limited to this and can be applied to a heat exchanger used other than the vehicle.

In the above embodiment, after the cut C is made in the flat plate (plate 20a), the portions cut off by the cut C are bent in the Z-axis direction to form the positioning portion 26 and the first edge portion 27. The case has been described as an example. Instead, after forming a first side surface portion 28 by bending a flat plate (plate 20a) in the Z-axis direction, the first side surface portion 28 and the positioning portion 26 are separated by shearing, and the positioning portion 26 is You may make it form.

This application is filed with Japanese Patent Application No. 2017-102067 filed with the Japan Patent Office on May 23, 2017, Japanese Patent Application No. 2017-102069 filed with the Japan Patent Office on May 23, 2017, and March 2018. Claiming priority based on Japanese Patent Application No. 2018-69139 filed with the Japan Patent Office on the 30th, the entire contents of which are incorporated herein by reference.

Claims (15)

A heat exchanging section for exchanging heat between the first fluid circulating outside and the second fluid circulating inside;
A cylindrical main body having a cylindrical portion that accommodates the heat exchange portion and an opening through which the first fluid flows;
The cylindrical portion is
A rectangular first plate having a first side surface forming part of the outer edge of the opening;
A rectangular second plate having a second side surface forming a part of the outer edge of the opening and a recess into which the first end of the first plate in the first direction enters,
The first plate is
A flat base portion;
A first edge extending from an end of the base portion in a second direction orthogonal to the first direction;
A first side surface portion formed to be bent from the first edge portion and having the first side surface;
It is provided continuously with the first end so as to be aligned with the first edge in the first direction, and enters the recess to position the first plate and the second plate in the second direction. A positioning part;
Heat exchanger. The heat exchanger according to claim 1,
The positioning portion is provided inward of the first side surface portion in the second direction,
When the positioning portion enters the recess, a brazing material that joins between the first edge of the first plate and the second plate is used as the brazing material for the first plate and the first plate of the first plate. Stay at the junction with the two plates,
Heat exchanger. The heat exchanger according to claim 1 or 2,
The distance between the first end surface of the first edge portion in the first direction and the second end surface of the positioning portion facing the first end surface is 0.5 mm or less.
Heat exchanger. The heat exchanger according to claim 3,
No gap is formed between the first end surface and the second end surface.
Heat exchanger. It is a heat exchanger as described in any one of Claim 1 to 4, Comprising:
The heat exchange part has a flow path forming part through which the second fluid flows,
The first fluid flows through the space between the cylindrical portion and the flow path forming portion,
The second fluid circulates inside the flow path forming unit.
Heat exchanger. The heat exchanger according to claim 5, wherein
The flow path forming portion has a plurality of tubes in which fins are alternately stacked between a pair of the first plates, and a brazing material is applied to a joint surface with the fins,
The laminated body in which the first plate, the tube, and the fins are laminated enters the concave portion of the second plate in a state compressed in the lamination direction.
Heat exchanger. The heat exchanger according to claim 5 or 6,
A tank part attached to the cylinder part and further having an inflow port for guiding a second fluid to the flow path forming part and an outflow port for discharging the second fluid from the flow path forming part;
The cylindrical portion further includes a step formed in an overlapping portion between the first plate and the second plate,
The tank portion includes a locking portion that is locked to a step formed in the overlapping portion.
Heat exchanger. A heat exchanger according to any one of claims 1 to 7,
Further comprising a frame connected to the opening,
The cylindrical portion is
A claw portion extending in the flow direction of the first fluid from the end surface on the opening side,
A pressure contact portion that is provided on the claw portion and is bent along the frame to press the frame against the opening.
Heat exchanger. The heat exchanger according to claim 8,
The pressure contact portion has a tapered surface facing the frame,
The frame body is in pressure contact with the opening when the tapered surface abuts.
Heat exchanger. The heat exchanger according to claim 8 or 9,
The frame is formed by a plate-shaped member,
The distance from the end surface on the opening side of the cylindrical portion to the pressure contact portion is shorter than the plate thickness of the frame body,
Heat exchanger. A heat exchanging section for exchanging heat between the first fluid flowing outside and the second fluid flowing inside;
A cylindrical main body having a cylindrical portion that accommodates the heat exchange portion and an opening through which the first fluid flows;
The cylindrical portion is
A rectangular first plate having a first side surface forming part of the outer edge of the opening;
A rectangular second plate having a second side surface forming a part of the outer edge of the opening and a recess into which the first end of the first plate in the first direction enters,
The first plate is
A flat first base portion;
A first edge portion extending from an end portion in a second direction orthogonal to the first direction of the first base portion;
A first side surface portion formed so as to be bent from the first edge portion and having the first side surface;
The second plate is
A plate-like second base portion;
A projecting portion protruding from the second base portion and forming the concave portion together with the second base portion,
When the first end portion of the first plate enters the concave portion of the second plate, the end surface of the first side surface portion in the first direction is the end surface of the standing portion on the opening side of the concave portion. Abut,
Heat exchanger. The heat exchanger according to claim 11,
A pair of the first plates;
The alternately stacked fins and tubes are sandwiched between the pair of first plates,
The end of the tube is inserted into a through hole provided in the second plate,
Heat exchanger. The heat exchanger according to claim 11 or 12,
The first side surface of the first plate and the second side surface of the second plate are provided on the same plane.
Heat exchanger. The heat exchanger according to claim 13,
A frame body connected to the opening;
Heat exchanger. The heat exchanger according to claim 13 or 14,
The first plate is provided continuously to the first end portion so as to be aligned with the first edge portion in the first direction, enters the concave portion, and the first plate and the second direction in the second direction. It has a positioning part that performs positioning with the plate,
The positioning portion is provided inward of the first side surface portion in the second direction.
Heat exchanger.

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