JP2005249332A - Duplex heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a duplex heat exchanger having improved heat exchanging performance by reducing a dead space made by a joint means between a first heat exchanger and a second heat exchanger. <P>SOLUTION: The duplex heat exchanger 1 comprises a first side plate 21 and a second side plate 31 for reinforcing a first radiator 2 and for reinforcing an outdoor heat exchanger 3, respectively, and first and second engaging plates 22, 32 provided in parallel thereto, respectively. The duplex heat exchanger 1 is assembled with the first engaging plate and the second engaging plate slid to enter into a gap 33 and a gap 23, respectively, while opposing an opening portion 25 between the first engaging plate 22 and the first side plate 21 to an opening portion 35 between the second engaging plate 32 and the second side plate 31. Thus, the dead space h between the first and second heat exchangers 2a, 3a is reduced to be about four times a plate thickness t of each side plate. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a dual heat exchanger comprising a plurality of heat exchangers.

  A heat exchanger such as a radiator or a condenser is generally composed of a plurality of tubes through which a fluid flows and fins provided on the outer surface of the tubes, and a reinforcing plate that reinforces the heat exchange core. (For example, refer to Patent Document 1).

Conventionally, a heat exchanger is assembled to a vehicle or the like by assembling one end of a metal bracket to a reinforcing plate with a bolt and the other end of the bracket to a vehicle body with a bolt.
Japanese Patent No. 3301158

  By the way, in recent years, a condenser and an oil cooler are combined in a state where a condenser of a vehicle air conditioner and an oil cooler for cooling engine oil and ATF (automatic transmission fluid) are arranged in parallel to the air flow, or an engine ( A combination of a radiator for an internal combustion engine) and a radiator for cooling a traveling electric motor and an inverter circuit for supplying drive current to the electric motor in parallel with the air flow. There is an increasing need for dual heat exchangers consisting of heat exchangers.

  Thus, as shown in FIG. 10, the present inventor has studied a dual heat exchanger in which two heat exchangers are coupled by fixing between brackets fixed to a reinforcing plate. In this dual heat exchanger, Between the heat exchange core 2a of the first heat exchanger and the heat exchange core 3a of the second heat exchanger, two reinforcing plates 200 and 201 and brackets 202 and 203 are arranged as a coupling means. It becomes.

  For this reason, the range of the length h0 between the heat exchange core 2a of the first heat exchanger and the heat exchange core 3a of the second heat exchanger is such that no fluid flows in each of the heat exchange cores 2a and 3a. It is a part and becomes a dead space that does not contribute to heat exchange. Since the accommodation space of the heat exchanger of the vehicle body is limited, when this dead space becomes large, the area of the heat exchange cores 2a and 3a becomes relatively small, and the heat exchange capacity of the entire dual heat exchanger decreases. End up. Therefore, in order to obtain the maximum heat exchange capability in a limited accommodation space, there is a demand for making this dead space as small as possible.

  Further, since the space between the heat exchange core 2a of the first heat exchanger and the heat exchange core 3a of the second heat exchanger is closed by two reinforcing plates and a bracket, it is assumed that When arrange | positioning the other heat exchanger 4 in the air flow downstream of a heat exchanger, heat exchange of a 1st heat exchanger is carried out among the heat exchange cores of the other heat exchanger 4 arrange | positioned downstream. There is a possibility that a sufficient amount of air for heat exchange cannot be supplied to a corresponding portion between the core 2a and the heat exchange core 3a of the second heat exchanger.

  In view of the above points, the present invention reduces the dead space by the coupling means between the first heat exchanger and the second heat exchanger in the dual heat exchanger, thereby reducing the heat exchange capability of the dual heat exchanger. The purpose is to increase.

  Further, even if another heat exchanger is arranged on the downstream side of the air flow of the dual heat exchanger, a large amount of heat exchange air is supplied to the other heat exchanger arranged on the downstream side. For the purpose.

  To achieve the above object, according to the first aspect of the present invention, a first heat exchange core (2a) comprising a plurality of tubes (2b) through which fluid flows and fins (2c) provided on the outer surface of the tubes. And a first side plate (21) provided on the first engagement surface (20) formed in the thickness direction of the first heat exchange core, and the first engagement surface and the gap (23) being separated from each other. One end is fixed to the first side plate via the connection portion (24), and the other end is configured to form an opening (25) with the first engagement surface. A first heat exchanger (2) including a first engagement plate (22), a plurality of tubes (3b) through which fluid flows, and a second heat including fins (3c) provided on the outer surface of the tubes. The exchange core (3a) and the second engagement surface (30 formed in the thickness direction of the second heat exchange core) The second side plate (31) provided on the second side plate is formed with a gap (33) between the second engagement surface and one end is fixed to the second side plate via the connection portion (34). And a second heat exchanger (2) comprising a second engagement plate (32) configured to form an opening (35) between the other end portion and the second engagement surface, The first engagement plate is located in the gap between the second engagement plate and the second engagement surface, and the second engagement plate is located in the gap between the first engagement plate and the first engagement surface. It is characterized by being assembled.

  In the present invention, a side surface formed along the thickness direction of the first heat exchange core is defined as a first engagement surface, and a first side plate is provided on the first engagement surface. The first side plate is fixed to the first side plate with a predetermined gap from the first engagement surface, and one end is fixed by the first side plate and the connection portion, and the other end is the first side plate. An opening is formed between the first engaging surface and the first engaging surface. In addition, the second heat exchange core is also provided with a second engagement plate, similar to the first engagement plate in the first heat exchange core. The first engagement plate is positioned in the gap between the second engagement plate and the second engagement surface, and the second engagement plate is in the gap between the first engagement plate and the first engagement surface. The first and second heat exchangers are assembled so as to be located at

  Accordingly, it is possible to configure a dual heat exchanger that is in a coupled state in which movement in the vertical direction is prevented with respect to at least the first and second engagement surfaces. Further, it is possible to achieve a coupled state in which the movement of the first engagement plate is blocked by the connection portion of the second side plate, and the movement of the second engagement plate is blocked by the connection portion of the first side plate.

  Further, since the gap between each engagement plate and the engagement surface can be made about the plate thickness of the mating engagement plate, the distance between the first engagement surface and the second engagement surface is set to the side plate or the engagement plate. Can be kept as low as several times the plate thickness.

  The first and second heat exchangers can be easily assembled by sliding the other engagement plate into the gap between the one engagement plate and the engagement surface.

  According to a second aspect of the present invention, the first engagement plate is disposed in parallel with the first engagement surface, and the second engagement plate is disposed in parallel with the second engagement surface. And the slide direction at the time of the assembly | attachment of a 2nd heat exchanger can be made into multiple directions in the surface parallel to a 1st and 2nd engagement surface, and the freedom degree of the slide direction at the time of an assembly | attachment can be raised.

  According to a third aspect of the present invention, the gap between the first engagement plate and the first engagement surface is made substantially equal to the thickness of the second engagement plate, and the second engagement plate and the second engagement surface The gap between the first engagement plate and the first engagement plate is approximately equal to the thickness of the first engagement plate.

  Thereby, at the time of assembly, the second engagement plate can be accommodated in the gap between the first engagement plate and the first engagement surface, and the first engagement plate has the second engagement plate and the second engagement surface. Can be stored in the gap between the two. Therefore, the interval between the first engagement surface and the second engagement surface after assembly can be suppressed to the sum of the plate thickness of the first engagement plate and the plate thickness of the second engagement plate.

  According to a fourth aspect of the present invention, the first engagement plate is formed such that an end portion in the width direction orthogonal to the thickness direction of the first heat exchange core extends in the direction in which the first side plate is positioned. It has a blocking part (37b).

  Accordingly, the movement of the second engagement plate housed in the gap between the first engagement plate and the first engagement surface, that is, the movement of the second side plate fixed to the second engagement plate via the connection portion. Can be blocked by a blocking portion provided at the end of the first engagement plate. Therefore, the coupling state of the first heat converter and the second heat converter can prevent movement in two directions perpendicular and parallel to the first and second engagement surfaces.

  The invention according to claim 5 is that the first side plate is formed such that an end portion in the width direction orthogonal to the thickness direction of the first heat exchange core extends in the direction in which the first engagement plate is positioned. A portion (37b) is provided.

  Accordingly, the movement of the second engagement plate housed in the gap between the first engagement plate and the first engagement surface, that is, the movement of the second side plate fixed to the second engagement plate via the connection portion. Can be blocked by a blocking portion provided at the end of the first side plate. Therefore, the coupling state of the first heat converter and the second heat converter can prevent movement in two directions perpendicular and parallel to the first and second engagement surfaces.

  According to a sixth aspect of the present invention, the first side plate includes a blocking portion formed by extending an end portion close to the opening in the thickness direction of the first heat exchange core in the direction in which the first engagement plate is positioned ( 36b).

  Accordingly, the movement of the second engagement plate housed in the gap between the first engagement plate and the first engagement surface, that is, the movement of the second side plate fixed to the second engagement plate via the connection portion. Can be blocked by a blocking portion provided at the end of the first side plate. Therefore, the coupling state of the first heat converter and the second heat converter can prevent movement in two directions perpendicular and parallel to the first and second engagement surfaces.

  According to a seventh aspect of the invention, the first engagement plate faces the first side plate and includes a fitting convex portion (40a), and the second engagement plate faces the second side plate and fits. A concave portion (40b) is provided, and the fitting convex portion and the fitting concave portion are fitted.

  Thereby, the relative motion of the 1st heat exchanger and the 2nd heat exchanger in the field of the 1st engagement board and the 2nd engagement board can be blocked.

  The invention according to claim 8 includes a joint portion (39) where the end portion of the first side plate and at least one of the end portion of the second side plate and the connection portion of the second side plate are joined. It is characterized by that.

  According to this invention, the end of the first side plate, the end of the second side plate, and at least one of the joints of the second side plate and the second engagement plate are joined at the joint. Here, joining means fixing two members by welding by laser welding, arc welding, spot welding or the like, or adhesion using an adhesive. Moreover, a junction part can be provided in a part of 1st and 2nd side plate or its junction part. Therefore, such a joint can prevent relative movement between the first heat exchanger and the second heat exchanger.

  According to a ninth aspect of the present invention, there is provided a joint portion (39) for joining the end portion of the first engagement plate and the end portion of at least one of the second engagement plate and the second side plate. Even so, the relative movement between the first heat exchanger and the second heat exchanger can be prevented.

  The invention according to claim 10 includes a first heat exchange core (2a) comprising a plurality of tubes (2b) through which fluid flows and fins (2c) provided on the outer surface of the tubes, and a first heat exchange core. The first side plate (1) is provided with a first engagement surface (20) formed in the air flow direction, and a first engagement portion having a U-shaped longitudinal section with respect to the surface formed in the air flow direction. 21), and a second heat exchange core (3a) comprising a plurality of tubes (3b) through which fluid flows and fins (3c) provided on the outer surface of the tubes And a second engagement portion formed on the second engagement surface (30) formed in the air flow direction of the second heat exchange core and having a U-shaped longitudinal section with respect to the surface formed in the air flow direction. A second heat exchanger (3) comprising a second side plate (31) And the first engagement portion and the second engagement portion are slid relative to each other within a plane formed in the air flow direction, whereby the first heat exchanger and the second heat exchanger are It is characterized by being coupled by engagement of the joint portion and the second engagement portion.

  In the present invention, a side surface formed along the air flow direction of the first heat exchange core is defined as a first engagement surface, and a first side plate is provided on the first engagement surface. The first side plate is formed with a first engagement portion having a U-shaped longitudinal cross-section with respect to the surface of the first heat exchange core in the air flow direction. The second heat exchange core also has a second engagement in which the longitudinal cross-sectional shape with respect to the surface in the air flow direction of the second heat exchange core is a U-shape, similarly to the first engagement portion in the first heat exchange core. Is provided. Then, the first engagement portion and the second engagement portion are slid in a state where the U-shaped opening portions face each other in a plane in the air flow direction, and the first and second heat exchangers are assembled.

  Accordingly, it is possible to configure a dual heat exchanger that is in a coupled state in which movement in the vertical direction is prevented with respect to at least the first and second engagement surfaces. Further, in the air flow direction in the first and second engagement surfaces, it is possible to achieve a coupled state that can prevent mutual movement in the sliding direction when the first engagement portion and the second engagement portion are assembled. .

  In addition, the distance between the first engagement surface and the second engagement surface can be kept low. Furthermore, the first and second heat exchangers can be easily assembled by sliding the other engagement plate into the gap between the one engagement plate and the engagement surface.

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

(First embodiment)
In the first embodiment, the dual heat exchanger according to the present invention is applied to a cooling device for a hybrid vehicle. FIG. 1 illustrates the dual heat exchanger 1 according to the first embodiment in the air flow direction. FIG. 2 is a diagram showing a cross-section (cross-section AA in FIG. 1) of a joint portion between the first heat exchanger 2 and the second heat exchanger 3 of the dual heat exchanger 1. . FIG. 3 is a diagram showing a vehicle-mounted state of the dual heat exchanger 1 according to the first embodiment.

  As shown in FIG. 1, the dual heat exchanger 1 according to the first embodiment cools a drive circuit such as an electric motor for travel (not shown) and an inverter circuit that controls the drive current of the electric motor. From the first radiator 2 as a first heat exchanger for exchanging heat between the inverter cooling water and the air, and the outdoor heat exchanger 3 as a second heat exchanger of a vehicle air conditioner (vapor compression refrigerator), etc. It is configured.

  The first radiator 2 and the outdoor heat exchanger 3 are arranged in parallel with each other on the upstream side of the cooling air flow of the second radiator 4 to be described later. In the present embodiment, the first radiator 2 is arranged above the outdoor heat exchanger 3.

  Further, on the downstream side of the air flow of the dual heat exchanger 1, that is, the first radiator 2 and the outdoor heat exchanger 3, as shown in FIG. 3, an engine cooling for cooling a traveling internal combustion engine (not shown). The 2nd radiator 4 which heat-exchanges water and air is arrange | positioned.

  As shown in FIG. 1, the first radiator 2 includes a flat tube 2b through which inverter cooling water flows, and a first heat exchange core 2a composed of fins 2c joined to the flat surface of the tube 2b, and the longitudinal direction of the tube 2b. A header tank 2e that communicates with the plurality of tubes 2b at both ends, a reinforcing plate 2d that extends in parallel with the tube 2b at the end of the first heat exchange core 2a, and reinforces the first heat exchange core 2a and the first The side plate 21 is used.

  The first side plate 21 is a metal plate made of an aluminum alloy having a thickness t (for example, t≈1.6 mm), as shown in FIG. 2, and has a thickness L (for example, L≈22 mm) of the first heat exchange core 2a. ) Direction (thickness direction), specifically the cooling air flow direction, that is, the first side plate 21 in the thickness direction when arranged on the first engagement surface 20 which is a side surface parallel to the vehicle longitudinal direction. Is previously press-molded so that the cross-sectional shape in FIG.

  By this press molding, a gap 23 is formed between the first side plate 21 and the first engagement plate 22 with an interval substantially equal to the thickness of the other second engagement plate 32 (for example, t≈1.6 mm). In addition, the first side plate 21 and the first engagement plate 22 are fixed (coupled) at one end in the air flow direction by the connecting portion 24, and the other side as the side facing the connecting portion 24. An opening 25 is formed at the end. The total thickness including the gap 23 from the first engagement surface 20 of the first side plate 21 to the surface of the first engagement plate 22 is 3t (≈4.8 mm).

  And the thickness which opposes the 1st side plate 21 arrange | positioned on the 1st engagement surface 20, and the tube 2b, the fin 2c, header tank 2e, and the 1st engagement surface 20 which are similarly metal, such as an aluminum alloy. The first heat exchanger 2 is molded by integrally joining the reinforcing plate 2d disposed on the side surface in the direction by brazing.

  Here, “brazing” is a technique for joining so as not to melt the base material using brazing material or solder, as described in, for example, “Connection / Joint Technology” (published by Tokyo Denki University Press). Say. In addition, when joining using the filler material whose melting | fusing point is 450 degreeC or more is called brazing, the melt material in that case is called brazing material, and when joining using the filler material whose melting | fusing point is 450 degrees C or less Is called soldering, and the filler material at that time is called solder.

  In this brazing process, as shown in FIG. 4, the first side plate 21 and the first side plate 21 are inserted into the gap 23 through the opening 25 between the first side plate 21 and the first engagement plate 22. The heat exchange core 2a and the reinforcing plate 2d not shown in FIG. 4 are integrally fixed by the fixing wire 101. The spacer 100 can prevent deformation of the opening 25 and the gap 23 in the first side plate 21 during brazing.

  Further, the outdoor heat exchanger 3 as the second heat exchanger has the same structure as the first radiator 2 as the first heat exchanger. Specifically, as shown in FIG. Tube 3b and a second heat exchange core 3a composed of fins 3c joined to the flat surface of the tube 3b, a header tank 3e communicating with a plurality of tubes 3b on both ends in the longitudinal direction of the tube 3b, and a second heat It consists of a U-shaped reinforcing plate 3d and a second side plate 31 that extend in parallel with the tube 3b at the end of the exchange core 3a and reinforce the second heat exchange core 3a.

  As shown in FIG. 2, the second side plate 31 is made of an aluminum alloy metal plate having a thickness t (for example, t≈1.6 mm), and has a thickness L (for example, L≈22 mm) of the second heat exchange core 3a. ) Direction (thickness direction), more specifically, the cooling air flow direction, that is, the thickness direction of the second side plate 31 when arranged on the second engagement surface 30 which is a side surface parallel to the vehicle longitudinal direction. Is pre-pressed so that the cross-sectional shape is substantially U-shaped.

  By this press molding, a gap 33 is formed between the second side plate 31 and the second engagement plate 32 at an interval substantially equal to the thickness of the other first engagement plate 22 (for example, t≈1.6 mm). In addition, the second side plate 31 and the second engagement plate 32 are fixed (coupled) at one end in the air flow direction by the connecting portion 34, and the other side as the side facing the connecting portion 34. An opening 35 is formed at the end. The total thickness including the gap 33 from the second engagement surface 30 of the second side plate 31 to the surface of the second engagement plate 32 is 3t (≈4.8 mm).

  The second side plate 31 disposed on the second engagement surface 30 and the tubes 3b, fins 3c, header tank 3e, and reinforcing plate 3d, which are also made of metal such as aluminum alloy, are all made of metal such as aluminum alloy. These are integrally joined by brazing.

  In the present embodiment, the corrugated corrugation in which the longitudinal direction of the tubes 2b and 3b is made to coincide with the horizontal direction, and louvers are formed as the fins 2c and 3c to disturb the air flow and improve the heat transfer coefficient. The fin is adopted.

  The first radiator 2 and the outdoor heat exchanger 3 configured as described above are configured so that the first engagement surface 20 and the second engagement surface 30 face each other, that is, the first side plate 21 and the first engagement plate 22. The second engagement plate 32 having a thickness t is positioned in the gap 23 having a distance t between the second side plate 31 and the gap 33 having a distance t between the second side plate 31 and the second engagement plate 32. The first engagement plate 22 having the length t is assembled so as to be positioned.

  In this assembly, the opening 25 between the first side plate 21 and the first engagement plate 22 and the opening 35 between the second side plate 31 and the second engagement plate 32 face each other. The radiator 2 and the outdoor heat exchanger 3 are assembled by sliding in parallel with the first engagement surface 20 and the second engagement surface 30 and in a direction approaching each other.

  That is, in the present embodiment, the first side plate 21 and the first engagement plate 22 and the connection portion 24 that connects them are used as the first engagement portion, and the second side plate 31 and the second engagement plate 32 are connected to each other. When the connecting portion 34 to be used is the second engaging portion, the first radiator 2 as the first heat exchanger and the outdoor heat exchanger 3 as the second heat exchanger are the first engaging portion and the second engaging portion. Coupled by engagement with the joint.

  Furthermore, in the present embodiment, as shown in FIG. 5 which is a perspective view of only the end portions of the first and second side plates 21, 31, the protruding plates 36a, 37a is provided, and after the slide assembly of the first radiator 2 and the outdoor heat exchanger 3, the projecting plates 36a and 37a are bent to form the blocking portions 36b and 37b.

  That is, when the second side plate 31 is press-molded, the protruding plate 36a is formed by partially extending the end portion of the second side plate 31 that is close to the opening in the thickness direction of the second heat exchange core 3a. . At the same time, a recess 360 is provided at the boundary between the protruding plate 36 a and the second side plate 31. Then, after the slide assembly, the protruding portion 36a is bent at a substantially right angle in the direction in which the first engagement plate 21 is positioned with the recess 360 as a valley fold, thereby forming a blocking portion 36b extending in this direction. The blocking portion 36b and the connecting portion 34 provided on the second side plate 31 can block the movement of the first heat exchange core 2a and the second heat exchange core 3a in the thickness direction.

  The protruding plate 37a has both ends in the direction perpendicular to the thickness direction of the second heat exchange core 3a of the second engagement plate 32, that is, in the width direction of the second heat exchange core 3a, when the second side plate 31 is press-molded. A portion (only one of them is shown in FIG. 5) is formed by partially extending. Then, after the projecting portion 37a is assembled to the slide, a concave portion (not shown) is bent at a substantially right angle in the direction where the second side plate 31 is located, thereby forming a blocking portion 37b extending in this direction. The blocking portions 37b are provided at both ends of the second engagement plate 32 in the width direction, and the blocking portions 37b allow the width orthogonal to the thickness direction of the first heat exchange core 2a and the second heat exchange core 3a. Movement in the direction can be prevented.

  Thus, by providing the blocking portions 36b and 37b, the first heat exchange core 2a and the second heat exchange core 3a are assembled together with the first and second engagement plates 22, 32 and the connection portions 24, 34. Movement is blocked and fixed.

  The second radiator 4 has the same structure as that of the first radiator 2, and specifically, a flat tube (not shown) through which cooling water flows through the engine 2 and fins joined to the flat surface of the tube ( Heat exchange core (not shown), header tanks (not shown) communicating with a plurality of tubes at both ends in the longitudinal direction of the tubes, and heat exchange by extending in parallel with the tubes 3a at the ends of the heat exchange cores It consists of a U-shaped reinforcing plate that reinforces the core. In this embodiment, the tube, fins, header tank, and reinforcing plate are all made of metal such as aluminum alloy, and these are integrally joined by brazing. ing.

  In this embodiment, a bracket 1a (see FIG. 1) for assembling the dual heat exchanger 1 to a vehicle is joined to the header tanks 2e and 3e by brazing. In the engine room of the vehicle, the thickness direction of the first and second heat exchange cores 2a and 3a is the front and rear direction of the vehicle at the position in front of the second radiator 4, that is, the first and second heats. The exchange cores 2a and 3a are fixed by bolts via the bracket 1a so that the width direction of the exchange cores 2a and 3a is the left-right direction of the vehicle. Thereby, in this embodiment, the air taken in from the front grill of the vehicle first passes through the first and second heat exchange cores 2a and 3a of the dual heat exchanger 1, and then the first and second After exchanging heat with the heat exchange cores 2 a and 3 a, the second radiator 4 is passed through to exchange heat with the second radiator 4.

  Next, the function and effect of this embodiment will be described. In the present embodiment, the first heat exchange core 2 a and the second heat exchange core 3 a are coupled to the first side fixed on the first engagement surface 20 and the second engagement surface 30, which are opposed surfaces, respectively. First and second engagement plates 22 and 32 provided on the plate 21 and the second side plate 31 so as to be parallel to the first and second engagement surfaces 20 and 30, respectively, are slid in parallel to the respective engagement surfaces. Then, it is performed by being positioned in the gaps 23 and 33 of each other. As a result, the distance h between the first engagement surface 20 and the second engagement surface 30 after assembly is such that the thickness of the first and second side plates 21 and 31 and the distance between the gaps 23 and 33 are both equal to t. Sometimes, 4t (≈6.4 mm). Therefore, the distance h between the first and second heat exchange cores 2a and 3a of the present embodiment can be made smaller than the dead space distance h0 = 25 mm in the duplex heat exchanger (FIG. 10) according to the studied product. it can.

  In the present embodiment, by reducing the distance h between the first and second heat exchange cores, the outer dimensions of the dual heat exchanger 1, specifically, the first and second engagement surfaces 20 and 30 are orthogonal to each other. The area effective for heat exchange of the first and second heat exchange cores 2a and 3a can be increased without increasing the dimension in the direction. Further, in the present embodiment, more cooling air can be supplied to the second radiator 4 on the downstream side than the dual heat exchanger according to the studied product.

  Furthermore, the duplex heat exchanger 1 of the present embodiment is configured by assembling the first heat exchanger (first radiator) 2 and the second heat exchanger (outdoor heat exchanger) 3 to each heat exchange core 2a, 3a. The first and second side plates 21 and 31 previously joined by brazing are slid parallel to each other to engage the first engagement plate 22 and the second engagement plate 32, and the ends of the side plates 21 and 31 are also engaged. Since the blocking portions 36b and 37b provided at the portions are fixed by blocking the movement of both, brackets and bolts are not required as in the case of the examined product, and the number of parts and the assembly process can be reduced.

(Second Embodiment)
FIG. 6 is a perspective view of only the first side plate 21 and the second side plate 31 in the second embodiment, as viewed obliquely from above. FIG. 6 (A) shows the first heat exchanger 2 and the second heat exchanger 3. (B) shows a state after the first heat exchanger 2 and the second heat exchanger 3 are assembled. In addition, in this 2nd Embodiment, since structures other than the shape of the 1st and 2nd side plates 21 and 31 are the same as that of the said 1st Embodiment, in FIG. 6, the 1st of the 1st heat exchanger 2 is shown. A part of the heat exchange core 2a and the second heat exchange core 3a of the second heat exchanger 3 are indicated by broken lines, and description thereof is omitted.

  The first side plate 21 is made of a metal plate such as an aluminum alloy (for example, a thickness t≈2 mm), and a central portion in the width direction of the first heat exchange core 2a as shown in FIG. It is press-molded so as to rise as a rectangular first engagement plate 22 parallel to the side plate 21. Further, on two opposing sides of the first engagement plate 22 that extend in the thickness direction of the first heat exchange core 2a of the first side plate 21, half of the distance L in the thickness direction of the first side plate 21 L / 2. Is a connecting portion for connecting the first side plate 21 and the first engagement plate 22 so that a notch 22a having a width corresponding to the thickness t of the second side plate 31 is generated. It is molded to be 24. Thus, a gap 23 having a thickness t is formed between the first engagement plate 22 and the first engagement surface 20 of the first heat exchange core 2a, and the first engagement surface 20 extends to the first engagement surface. The total thickness including the gap 23 to the surface of the plywood 22 is 2t.

  It should be noted that projecting plates 36a projecting in the thickness direction at the time of press molding of the first side plate 21 on both sides of the first side plate 21 in the width direction where the cuts 22a are formed (FIG. 6A). )) Is formed.

  The second side plate 31 is configured similarly to the first side plate 21. The first side plate 21 is previously joined to the first engagement surface 20 of the first heat exchange core 2a by brazing, and the second side plate 31 is joined to the second engagement surface 30 of the second heat exchange core 3a. It is joined beforehand by contact.

  When the first and second heat exchangers 2 and 3 are assembled, the notch 22a of the first engagement plate 22 and the notch 32a of the second engagement plate 32 face each other, and the first side plate 21 and the second side plate 31 are made to face each other. By sliding in the direction approaching each other, the first engagement plate 22 is positioned in the gap 33 between the second engagement plate 32 and the second engagement surface 30, and at the same time, the second engagement plate 32 is moved to the first engagement plate. It is located in the gap 23 between 22 and the second engagement surface 20. Thereby, the space | interval h of the 1st engagement surface 20 of the 1st heat exchange core 2a and the 2nd engagement surface 30 of the 2nd heat exchange core 3a overlaps the 1st side plate 21 and the 2nd side plate 31. FIG. This corresponds to a thickness 2t.

  After this sliding step, the two protruding plates 36a in the width direction provided on the second side plate 31 are bent substantially at right angles to the direction in which the first side plate 21 is located, thereby forming the blocking portion 36b. The assembly of the dual heat exchanger 1 of the form is completed. That is, the first engagement plate 22 and the connection portion 34 of the second side plate 31 abut, and the second engagement plate 32 and the connection portion 24 of the first side plate 21 abut, The movement in the width direction of the second side plates 21 and 31 is blocked, and the movement in the thickness direction of the first and second side plates is blocked by the blocking portions 36b provided in the first and second side plates 21 and 31, respectively. The first heat exchanger 2 and the second heat exchanger 3 are combined.

  As described above, in the second embodiment, the distance h between the first heat exchange core 2a and the second heat exchange core 3a is set to the sum of the plate thicknesses of the first side plate 21 and the second side plate 31 (2t As in the first embodiment, the external dimensions of the dual heat exchanger 1, more specifically, without increasing the dimensions in the direction orthogonal to the first and second engagement surfaces 20, 30, can be reduced. The effective area for heat exchange between the first and second heat exchange cores 2a and 3a can be increased. Further, in the present embodiment, more cooling air can be supplied to the second radiator 4 on the downstream side than the dual heat exchanger according to the studied product.

  In the second embodiment, an example in which only one set of the first engagement plate 22 and the second engagement plate 32 is provided is shown. However, a plurality of sets are arranged separately in the width direction. You may make it do.

(Other embodiments)
In the first embodiment, the second side plate 31 and the second engagement plate are used to prevent the movement of the first and second side plates 21 and 31 after the first and second heat exchangers 2 and 3 are assembled. Although the blocking portions 36b and 37b are provided at the respective end portions of 32, the arrangement position of the blocking portions is not limited thereto. That is, various combinations are possible as follows.

  (1) In order to prevent movement in the width direction, blocking portions 37b bent at substantially right angles in the direction in which the first engagement plate 22 is positioned are provided at the left and right ends of the first side plate 21 in the width direction. The side plate 31 may be provided with a blocking portion 36b that blocks the movement in the thickness direction similar to the first embodiment.

  (2) In order to prevent movement in the width direction, blocking portions 37b bent substantially at right angles in the direction in which the first side plate 21 is positioned are provided at the left and right ends of the first engagement plate 22 in the width direction, and the second side The plate 31 may be provided with a blocking portion 36b that blocks the movement in the thickness direction similar to the first embodiment.

  (3) In FIG. 5, the side plate above the paper surface is described as the first side plate, and the side plate below the paper surface is described as the second side plate. However, the side plate above the paper surface is the second side plate, below the paper surface. This side plate is referred to as a first side plate, and a blocking portion 36b that prevents movement in the thickness direction is provided at the end of the first side plate, and movement in the width direction is blocked at the left and right ends of the first engagement plate. A blocking portion 37b may be provided. Also in (1) and (2) above, the first side plate and the second side plate may be interchanged.

  In the first and second embodiments, as the blocking portion for preventing the movement of the first and second side plates 21 and 31, the first and second side plates or the first and second engagement plates are protruded during press molding. However, the present invention is not limited to this and can be configured as follows.

  (4) FIG. 7 is a perspective view of the end portions of only the first and second side plates 21 and 31. In the example of FIG. 7, the end 38 in the thickness direction of the second heat exchange core of the second side plate 31 is extended, and after the slide assembly of the first and second heat exchangers 2 and 3, The convex part 38a is provided by deforming the part from the bottom to the top (in the direction of the first heat exchange core) in FIG. Thereby, this convex part 38a and the connection part 24 of the 1st side plate 21 contact | abut, and the movement of the thickness direction of the 1st side plate 21 and the 2nd side plate 31 can be blocked | prevented.

  (5) FIG. 8 is a perspective view of the end portions of only the first and second side plates 21 and 31. In the example shown in FIG. 8, after the first and second heat exchangers 2 and 3 are assembled by sliding, the connecting portion 24 of the first side plate 21 and the end portion in the thickness direction of the second side plate 31 are arranged at appropriate positions. 39 can be joined by brazing or joining means such as arc welding or laser welding. In this case, not only movement in the thickness direction but also movement in the width direction can be prevented. In addition to the example of FIG. 8, for example, the joint portion 39 may be formed by joining the first engagement plate 22 and the second engagement plate 23 at the end in the width direction, or with the first side plate 21. The second engagement plate 32 or the first side plate 21 and the second engagement plate 32 may be joined.

  (6) FIG. 9 is a sectional view in the thickness direction of only the first and second side plates 21 and 31. In the example shown in FIG. 9, a fitting recess 40 b is provided in advance on the surface of the first engagement plate 22 that faces the first side plate 21 (that is, the second engagement plate 32), and the second engagement plate 32 has a second shape. The fitting convex part 40a is provided on the surface facing the two side plates 31 (that is, the first engaging plate 22). A surface parallel to the thickness direction of the first side plate 21 and the second side plate 31 by fitting the fitting convex portion 40a to the fitting concave portion 40b when the first and second side plates 21 and 31 are assembled by sliding. The upper movement can be prevented and the two can be fixedly coupled. Also in this example, the fitting convex portion 40a may be provided on the first engaging plate 22 and the fitting concave portion 40b may be provided on the second engaging plate 32.

  In the said 1st Embodiment, although the 1st engagement board 22 and the 2nd engagement board 32 showed the example provided over the whole width direction of the 1st heat exchanger 2 and the 2nd heat exchanger 3, respectively, However, the present invention is not limited to this configuration.

  (7) That is, each of the first and second engagement plates 22 and 23 is a rectangular piece, and these pieces are separated into several parts in the width direction of the first and second heat exchange cores 2a and 3a. May be positioned. In this case, each small piece is formed by being fixed to the first side plate 21 or the second side plate 31 by the connection portion 24 or 34 at the side in the width direction, as in the first embodiment.

  (8) Furthermore, in the above (7), the connecting portions 24 and 34 that connect the first engaging plates 22 or the second engaging plates 32 and the first or second side plates 21 and 31 that are rectangular are arranged in the width direction. It may be provided not only on the side but also on one side or two sides adjacent to the side in the width direction, or on the side facing the side in the width direction. In this case, the side where the connection portion is provided may be set so as not to interfere with the connection portion of the other side plate at the time of slide assembly. As described above, by providing the connection portions on a plurality of sides of the first or second engagement plate, the connection portions prevent the movement of the side plates in the same manner as the blocking portions in the first and second embodiments. be able to.

  Further, in each of the above embodiments, the first engagement plate 22 and the second engagement plate 32 are parallel to the first side plate 21 and the second side plate 31, respectively, that is, the gaps 23 and 33 each have a certain distance. Although an example is shown, the present invention is not limited to this, and can be configured as follows.

  (9) For example, the first engagement plate 22 (and the first side plate 21) is formed so that the gap 23 of the first side plate 21 is inclined with respect to the first engagement surface 20 in the thickness direction. The cross-sectional shape of the second engagement plate 32 may be set so as to enter the gap 23. In this case, the first and second heat exchangers 2 and 3 can be assembled by sliding in the width direction instead of the thickness direction.

It is the front view which looked at the dual heat exchanger concerning a 1st embodiment of the present invention from the distribution direction of air. It is sectional drawing which shows the characteristic of the duplex heat exchanger of 1st Embodiment, (A) is a figure which shows the state before an assembly | attachment, (B) is a figure which shows the state after an assembly | attachment. It is a figure which shows the vehicle mounting state of the compound heat exchanger of 1st Embodiment. It is a figure which shows the state in the brazing process of the 1st heat exchanger of 1st Embodiment. It is a perspective view which shows the formation process of the prevention part of 1st Embodiment, (A) is a figure which shows the state before bending of a protrusion board, (B) shows the state in which the prevention part was formed by bending of a protrusion board. FIG. It is a perspective view of the 1st and 2nd side plate in 2nd Embodiment of this invention, (A) is a figure which shows the state before slide assembly | attachment, (B) is a figure which shows the state after slide assembly | attachment. It is a perspective view of the 1st and 2nd side plate in other embodiments. It is a perspective view of the 1st and 2nd side plate in other embodiments. It is sectional drawing of the 1st and 2nd side plate in other embodiment. It is a figure which shows the double-type heat exchanger which concerns on an examination product.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Duplex heat exchanger, 2 ... 1st radiator (1st heat exchanger), 2a ... 1st heat exchange core,
2b ... tube, 2c ... fin, 2d ... reinforcement plate, 2e ... header tank,
3 ... outdoor heat exchanger (second heat exchanger), 3a ... second heat exchange core, 3b ... tube,
3c ... fins, 3d ... reinforcing plate, 3e ... header tank, 20 ... first engaging surface,
21 ... 1st side plate, 22 ... 1st engagement board, 23 ... Gap | interval, 24 ... Connection part,
25 ... opening, 30 ... second engagement surface, 31 ... second side plate, 32 ... second engagement plate,
33 ... Gap, 34 ... Connecting portion, 35 ... Opening portion, 36b, 37b ... Blocking portion.

Claims (10)

A first heat exchange core (2a) comprising a plurality of tubes (2b) through which fluid flows and fins (2c) provided on the outer surface of the tubes;
A first side plate (21) provided on a first engagement surface (20) formed in the thickness direction of the first heat exchange core;
The first engagement surface is formed with a gap (23) therebetween, and one end is fixed to the first side plate via a connection portion (24), and the other end is the first engagement. A first heat exchanger (2) comprising: a first engagement plate (22) configured to form an opening (25) with the mating surface;
A second heat exchange core (3a) comprising a plurality of tubes (3b) through which fluid flows and fins (3c) provided on the outer surface of the tubes;
A second side plate (31) provided on a second engagement surface (30) formed in the thickness direction of the second heat exchange core;
The second engagement surface is formed with a gap (33) therebetween, and one end is fixed to the second side plate via a connection portion (34), and the other end is the second engagement. A second heat exchanger (2) comprising a second engagement plate (32) configured to form an opening (35) with the mating surface;
The first engagement plate is located in the gap between the second engagement plate and the second engagement surface, and the second engagement plate is between the first engagement plate and the first engagement surface. It is assembled | attached so that it may be located in the said gap | interval of this type | mold heat exchanger. The first engagement plate is disposed in parallel with the first engagement surface, and the second engagement plate is disposed in parallel with the second engagement surface. Double heat exchanger. The gap between the first engagement plate and the first engagement surface is substantially equal to the plate thickness of the second engagement plate, and between the second engagement plate and the second engagement surface. The dual heat exchanger according to claim 2, wherein an interval of the gap is substantially equal to a thickness of the first engagement plate. The first engaging plate includes a blocking portion (37b) formed by extending an end portion in a width direction orthogonal to the thickness direction of the first heat exchange core in a direction in which the first side plate is positioned. The dual heat exchanger according to any one of claims 1 to 3, further comprising: The first side plate includes a blocking portion (37b) in which an end portion in a width direction orthogonal to the thickness direction of the first heat exchange core extends in a direction in which the first engagement plate is positioned. The dual heat exchanger according to any one of claims 1 to 3, wherein the dual heat exchanger is provided. The first side plate includes a blocking portion (36b) formed by extending an end portion close to the opening in the thickness direction of the first heat exchange core in a direction in which the first engagement plate is positioned. The dual heat exchanger according to any one of claims 1 to 5, wherein the dual heat exchanger is provided. The first engagement plate includes a fitting convex portion (40a) facing the first side plate,
The second engagement plate includes a fitting concave portion (40b) facing the second side plate,
The dual heat exchanger according to any one of claims 1 to 6, wherein the fitting convex portion and the fitting concave portion are fitted. The joint portion (39), wherein the end portion of the first side plate and at least one of the end portion of the second side plate and the connection portion of the second side plate are joined. The dual heat exchanger according to any one of 1 to 7. The joint portion (39) for joining the end portion of the first engagement plate and at least one of the second engagement plate and the second side plate is provided. The double type heat exchanger as described in any one of thru | or 8. A first heat exchange core (2a) comprising a plurality of tubes (2b) through which fluid flows and fins (2c) provided on the outer surface of the tubes;
A first engagement portion is formed on the first engagement surface (20) formed in the air flow direction of the first heat exchange core, and a vertical cross section with respect to the surface formed in the air flow direction is formed in a U shape. A first heat exchanger (2) comprising: a first side plate (21),
A second heat exchange core (3a) comprising a plurality of tubes (3b) through which fluid flows and fins (3c) provided on the outer surface of the tubes;
A second engagement portion is formed on the second engagement surface (30) formed in the air flow direction of the second heat exchange core and has a U-shaped longitudinal section with respect to the surface formed in the air flow direction. A second heat exchanger (3) comprising a second side plate (31) that is
The first engagement portion and the second engagement portion are slid relative to each other within a plane formed in the air flow direction, so that the first heat exchanger and the second heat exchanger are The dual heat exchanger is characterized by being coupled by engagement between a first engagement portion and a second engagement portion.

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