JP2023104284A - Heat exchanger - Google Patents

Abstract

To actualize reliable connection of a pipe by enabling the variations of parts of a heat exchanger to be absorbed, when providing the pipe to be connected to two positions of the heat exchanger.SOLUTION: A heat exchanger includes a metal pipe 60 to be connected to a first space R1 and a second space R4 of a first header tank 30. One end of the metal pipe 60 is fixed to a first header tank 30 in the state of being connected to the first space R1, and the other end of the metal pipe 60 is fixed to the first header tank 30 in the state of being connected to the second space R4. The metal pipe 60 is split into two or more pipe structural members 61-63 in the longitudinal direction and is length adjustable.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a heat exchanger with tubes through which refrigerant flows.

For example, air conditioners and various cooling devices use heat exchangers having tubes through which refrigerant flows (see, for example, Patent Documents 1 and 2). The heat exchanger of Patent Document 1 is a condenser. This condenser consists of a plurality of laminated plates, a heat radiating part that condenses the refrigerant supplied from the compressor, and a receiver dryer part that allows the condensed refrigerant to flow in, separates the refrigerant from liquid and removes moisture. and a connecting pipe that connects the heat radiating part and the receiver-dryer part.

In addition, the heat exchanger of Patent Document 2 includes header tanks arranged at both ends of the tubes, and is configured so that the refrigerant that has flowed into the tubes from one header tank flows into the other header tank. ing. This heat exchanger is provided with a communication member extending from the end of one header tank to the end of the other header tank.

JP 2013-119376 A JP 2020-199955 A

By the way, in Patent Document 1, the heat radiating part and the receiver dryer part are connected with a connecting pipe to enable the circulation of the refrigerant. The relative positions of the receiver-drier section and the receiver-dryer section may vary, and the distance between the heat-dissipating section and the receiver-dryer section may be shortened or lengthened. In addition, it is difficult for the connecting pipe to have a constant length due to errors in molding. These errors are managed so that they fall within the tolerance range, but since the connecting pipe is generally made of metal, for example, the distance between the heat radiating part and the receiver-dryer part is the longest within the tolerance range, and the connecting pipe is the shortest within the tolerance range, it becomes difficult to connect the heat radiating part and the receiver-dryer part with a connecting pipe, and if you try to connect it forcibly, it may lead to poor connection and quality deterioration. . If the distance between the heat radiating part and the receiver-dryer part is the shortest within the tolerance range and the connecting pipe is the longest within the tolerance range, the quality may similarly deteriorate.

Further, in Patent Document 2, one header tank and the other header tank are connected by a communicating member to enable the flow of the refrigerant. The above variations cannot be absorbed, and there is a risk of causing connection failures and quality deterioration.

In order to prevent connection failures such as those described above, narrowing the tolerance range is conceivable. However, if the tolerance range is to be narrowed, the molding accuracy and assembly accuracy must be improved, resulting in an increase in cost.

The present disclosure is made in view of this point, and the object thereof is to provide a pipe that is connected to two places of a heat exchanger so that the pipe can absorb variations in each part of the heat exchanger. The purpose is to ensure a reliable connection.

In order to achieve the above object, in a first aspect of the present disclosure, a first header tank connected to one end of three or more tubes arranged in a predetermined direction and extending in the predetermined direction; and a second header tank extending in the predetermined direction. In the first header tank and the second header tank, the inside of the first header tank and the second header tank are divided into a plurality of spaces, respectively, so that the tubes are arranged in the predetermined direction in three or more paths. A partition plate is provided to divide the The heat exchanger includes a metal pipe connected to the first space and the second space separated in the predetermined direction inside the first header tank and extending in the predetermined direction. One end is fixed to the first header tank while being connected to the first space, and the other end of the metal pipe is fixed to the first header tank while being connected to the second space. It is The metal pipe is divided into at least two or more pipe-constituting members in the predetermined direction, that is, the longitudinal direction, so that the length thereof can be adjusted.

According to this configuration, the length of the metal pipe should be such that one end and the other end of the metal pipe can be reliably connected to the first space and the second space of the first header tank, respectively. can be done. As a result, even if there is a molding error or assembly error in each part, the error can be absorbed by adjusting the length of the metal pipe.

In a second aspect of the present disclosure, one end of the metal pipe is inserted into a first connecting hole formed in the first header tank in a direction that intersects with the predetermined direction. The other end is inserted into a second connecting hole formed in the first header tank in a direction crossing the predetermined direction.

That is, since the direction in which one end and the other end of the metal pipe are inserted into the first header tank intersects with the longitudinal direction of the metal pipe, the one end and the other end of the metal pipe are inserted into the first header tank. If the length of the metal pipe does not correspond to the distance between the first connection port and the second connection port when inserting it into the 1 header tank, it will be difficult to insert it. is adjustable, one end and the other end of the metal pipe can be easily inserted.

In a third aspect of the present disclosure, the metal pipe has a first pipe component and a second pipe component arranged in the predetermined direction. A tubular first enlarged diameter portion extending in the predetermined direction is formed on the first pipe constituent member on the side of the second pipe constituent member, and the second pipe constituent member has the first enlarged diameter portion. inserted in the part.

According to this configuration, when adjusting the length of the metal pipe, it can be easily and steplessly adjusted by the amount of insertion of the second pipe member into the first expanded diameter portion.

In a fourth aspect of the present disclosure, the metal pipe has a third pipe component, and the first pipe component, the second pipe component, and the third pipe component are aligned in the predetermined direction. are arranged in order. In this case, the second pipe component can be composed of a straight pipe.

According to this configuration, since the second pipe component is a straight pipe, the length of the second pipe component can be changed easily and inexpensively. By changing the length of the second pipe component, the length of the entire metal pipe can be changed, which facilitates setting the length of the entire metal pipe to match the size of the heat exchanger. Further, even if the size of the heat exchanger is changed, it can be dealt with only by changing the second pipe constituent member without changing the first pipe constituent member and the second pipe constituent member. can be reduced.

In a fifth aspect of the present disclosure, one end and the other end of the metal pipe can be press-fitted into the first connection port and the second connection port, respectively. According to this configuration, when the metal pipe is fixed to the first header tank by brazing, one end and the other end of the metal pipe are removed from the first connection port and the second connection port before brazing. It can hold a metal pipe so that it does not. Therefore, holding by a jig or the like becomes unnecessary, and equipment costs can be reduced.

In a sixth aspect of the present disclosure, the first header tank is provided at one end and the other end of the metal pipe with respect to the peripheral edge of the first connection port and the peripheral edge of the second connection port, respectively. A positioning portion is provided for positioning in the insertion direction by coming into contact with the outside of the housing.

According to this configuration, when the one end and the other end of the metal pipe are inserted into the first connection port and the second connection port, the insertion amount can be regulated by the positioning portion so as not to exceed a certain amount. Therefore, it is possible to improve the accuracy of assembly while simplifying the assembly work.

In a seventh aspect of the present disclosure, a cylindrical second enlarged diameter portion extending in the predetermined direction is formed on the second pipe constituent member side of the third pipe constituent member, and the second pipe constituent member has The third pipe component side is inserted into the second enlarged diameter portion, and the second pipe component member is made of a clad material having an outer surface clad with a brazing material.

According to this configuration, the brazing filler metal clad on the outer surface of the second pipe member is used when the first pipe member and the second pipe member are brazed, and when the second pipe member and the third pipe member are brazed. material can be used. Therefore, since the ring-shaped brazing material becomes unnecessary, it is not necessary to provide each pipe component with a shape for holding the ring-shaped brazing material, and the shape of each pipe component can be simplified.

In an eighth aspect of the present disclosure, the first pipe component and the second pipe are arranged such that the central axis of the first enlarged diameter portion and the central axis of the second enlarged diameter portion are aligned on the same straight line. A middle portion of the component can be bent.

As described above, since the metal pipe connected to the first space and the second space of the first header tank is divided into at least two or more so that the length can be adjusted, variations in each part can be absorbed. A metal pipe can be reliably connected to the first header tank.

It is the perspective view which looked at the heat exchanger which concerns on embodiment of this invention from back. It is the perspective view which looked at the said heat exchanger from the front. It is a perspective view which shows the positional relationship of the said heat exchanger and a battery. FIG. 3 is a cross-sectional view taken along line IV-IV in FIG. 2; It is a top view of the left-hand rear part of the said heat exchanger. It is the perspective view which looked at a part of rear side pipe structural member from the downward direction. FIG. 6 is a cross-sectional view taken along line VII-VII in FIG. 5; 5 is an enlarged view of part A in FIG. 4; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is essentially merely illustrative, and is not intended to limit the invention, its applications, or its uses.

1-3 show a heat exchanger 1 according to an embodiment of the invention. As shown in FIG. 3, heat exchanger 1 is a battery cooler for cooling first to fourth batteries B1 to B4. The first to fourth batteries B1 to B4 are for supplying electric power to a driving motor (not shown) mounted on, for example, an electric vehicle or a hybrid vehicle. Therefore, the heat exchanger 1 is also mounted on an electric vehicle, a hybrid vehicle, or the like. A hybrid vehicle may be a plug-in hybrid that can be charged from a commercial power supply or the like.

In this embodiment, four batteries, ie, first to fourth batteries B1 to B4 are mounted, and the first battery B1 is arranged at the rearmost and the fourth battery B4 is arranged at the frontmost. The number of batteries is not limited to four. Each of the first to fourth batteries B1 to B4 contains a plurality of cells (not shown). Also, the first to fourth batteries B1 to B4 are elongated in the left-right direction, and are spaced apart from each other in the front-rear direction. The first to fourth batteries B1 to B4 have the same shape and size, but may be different from each other.

The first to fourth batteries B1 to B4 and the heat exchanger 1 are housed in a battery case (not shown). In the description of this embodiment, the front-rear direction and the left-right direction are defined as shown in each figure, but this is only defined for convenience of explanation, and the directions during actual use and The direction at the time of manufacture is not limited, and it can be mounted so that the front-rear direction is the left-right direction of the automobile.

The heat exchanger 1 includes first to eighth tubes 11 to 18, a right header tank 20, a left header tank 30, an inflow side connection member 40, an outflow side connection member 50, and a bypass pipe 60. . The first to eighth tubes 11 to 18 are flat plate-shaped tubes extending in the left-right direction, made of, for example, an aluminum alloy or the like, and arranged side by side in the front-rear direction at intervals. The front-rear direction is defined as a predetermined direction, and the direction orthogonal to the predetermined direction in plan view is the left-right direction. The first to eighth tubes 11 to 18 may all be the same, or they may be different from each other. In this embodiment, the first to eighth tubes 11 to 18 are all the same. Note that the first to eighth tubes 11 to 18 may extend in the front-rear direction. In this case, the configuration has a front side header tank and a rear side header tank, and the first to eighth tubes 11 to 18 are arranged side by side. The predetermined direction, which is the direction, is the horizontal direction.

The first tube 11 and the second tube 12 are arranged close to each other in the front-rear direction to form one set. A first battery B<b>1 is placed on the upper surfaces of the first tube 11 and the second tube 12 . The longitudinal dimension of the first tube 11 and the second tube 12 is set shorter than the longitudinal dimension of the first battery B1.

The third tube 13 and the fourth tube 14 are separated forward from the second tube 12 and arranged close to each other in the front-rear direction to form one set. The interval between the third tube 13 and the fourth tube 14 is the same as the interval between the first tube 11 and the second tube 12 . Also, the interval between the second tube 12 and the third tube 13 is set wider than the interval between the first tube 11 and the second tube 12 . A second battery B<b>2 is placed on the upper surfaces of the third tube 13 and the fourth tube 14 .

The fifth tube 15 and the sixth tube 16 are separated forward from the fourth tube 14 and arranged close to each other in the front-rear direction to form one set. The interval between the fifth tube 15 and the sixth tube 16 is the same as the interval between the first tube 11 and the second tube 12 . Also, the interval between the fourth tube 14 and the fifth tube 15 is set to be the same as the interval between the second tube 12 and the third tube 13 . A third battery B3 is placed on the upper surfaces of the fifth tube 15 and the sixth tube 16 .

The seventh tube 17 and the eighth tube 18 are separated forward from the sixth tube 16 and arranged close to each other in the front-rear direction to form one set. The interval between the seventh tube 17 and the eighth tube 18 is the same as the interval between the first tube 11 and the second tube 12 . Also, the interval between the sixth tube 16 and the seventh tube 17 is set to be the same as the interval between the second tube 12 and the third tube 13 . A fourth battery B4 is placed on the upper surfaces of the seventh tube 17 and the eighth tube 18 . The number of tubes may be changed according to the number of batteries. For example, if the number of batteries is increased by one, the number of tubes should be increased by two, and if the number of batteries is decreased by one, the number of tubes should be decreased by two. Also, one tube may be arranged under one battery, or three or more tubes may be arranged.

A left header tank (first header tank) 30 is positioned to the left of the first to fourth batteries B1 to B4 and extends in the front-rear direction in which the first to eighth tubes 11 to 18 are arranged. . Left ends (one ends) of the first to eighth tubes 11 to 18 are connected to the left header tank 30 . As shown in FIG. 1 , the rear end of the left header tank 30 is closed by a rear closing plate 31 . A front blocking plate 32 is provided at a portion rearwardly away from the front end of the left header tank 30 , and the front side of the left header tank 30 is blocked by the front blocking plate 32 . The front blocking plate 32 is positioned in front of the eighth tube 18 . The rear closing plate 31 and the front closing plate 32 are brazed to the left header tank 30 .

The left header tank 30 is provided with first to third left partition plates 33 , 34 and 35 between the rear closure plate 31 and the front closure plate 32 . The first to third left partition plates 33 , 34 , 35 are also brazed to the left header tank 30 . The first left partition plate 33 is provided between the first tube 11 and the second tube 12 . A second left partition plate 34 is provided between the third tube 13 and the fourth tube 14 . A third left partition plate 35 is provided between the sixth tube 16 and the seventh tube 17 . As a result, inside the left header tank 30, there is a left first space R1 between the rear closing plate 31 and the first left partition plate 33, and a space between the first left partition plate 33 and the second left partition plate 34. a second left space R2 between the second left partition plate 34 and the third left partition plate 35; a third left space R3 between the second left partition plate 34 and the third left partition plate 35; 4 spaces R4 are formed.

Although details will be described later, the left header tank 30 is provided with a bypass pipe 60 . The bypass pipe 60 includes a rear pipe component 61 connected to the left first space R1, a front pipe component 63 connected to the left fourth space R4, a rear pipe component 61 and a front pipe component 63. and an intermediate pipe component 62 connecting the . The left first space R1 and the left fourth space R4 communicate with each other via the bypass pipe 60 .

A left bracket 37 is brazed to the front side portion of the left header tank 30 relative to the front closing plate 32 . The left bracket 37 is formed with a left positioning hole 37a through which the left positioning pin P1 shown in FIG. 3 is inserted. The left positioning pin P<b>1 is fixed to, for example, a battery case or the like, and is a member for positioning the heat exchanger 1 .

The right header tank (second header tank) 20 is positioned to the right of the first to fourth batteries B1 to B4 and extends substantially parallel to the left header tank 30 in the front-rear direction. Right ends (other ends) of the first to eighth tubes 11 to 18 are connected to the right header tank 20 . As shown in FIG. 1 , the rear end of the right header tank 20 is closed by an outflow side connecting member 50 . The outflow-side connecting member 50 is a block-shaped member made of, for example, an aluminum alloy, and serves to allow the refrigerant to flow outside after flowing through the tubes 11 to 18 constituting the heat exchanger 1 . The outflow side connection member 50 is formed with an outlet 50a to which a discharge pipe (not shown) for discharging the refrigerant is connected.

A front blocking plate 22 is provided at a portion rearwardly away from the front end of the right header tank 20 , and the front side of the right header tank 20 is blocked by the front blocking plate 22 . The front blocking plate 22 is located in front of the eighth tube 18 . The outflow side connection member 50 and the front side closing plate 22 are brazed to the right header tank 20 .

The right header tank 20 is provided with first to third right partition plates 23 , 24 and 25 between the outflow side connecting member 50 and the front closing plate 22 . The first to third right partition plates 23 , 24 and 25 are also brazed to the right header tank 20 . The first right partition plate 23 is provided between the first tube 11 and the second tube 12 . A second right partition plate 24 is provided between the second tube 12 and the third tube 13 . The third right partition plate 25 is provided between the fourth tube 14 and the fifth tube 15 . As a result, inside the right header tank 20, there is a right first space S1 between the outflow side connection member 50 and the first right partition plate 23, and a space between the first right partition plate 23 and the second right partition plate 24. a right second space S2 between, a right third space S3 between the second right partition plate 24 and the third right partition plate 25, and a right third space S3 between the third right partition plate 25 and the front closing plate 22 4 spaces S4 are formed. The right first space S<b>1 communicates with the outlet 50 a of the outflow side connecting member 50 .

A right bracket 27 is brazed to a portion of the right header tank 20 on the front side of the front closing plate 22 . The right bracket 27 is formed with a right notch 27a through which the right positioning pin P2 shown in FIG. 3 is inserted. The right positioning pin P2 is fixed to, for example, a battery case or the like, and is a member for positioning the heat exchanger 1. As shown in FIG.

An inflow-side connection member 40 is fixed to the right header tank 20 . The inflow-side connection member 40 is an aluminum alloy block-shaped member having an inlet (opening) 40a for allowing the refrigerant to flow into the right header tank 20, and can also be called, for example, a connection block. As shown in FIGS. 4 and 5, the inflow side connection member 40 is connected to a refrigerant pipe (not shown) for causing the refrigerant to flow into the heat exchanger 1. For example, the pressure is reduced by an expansion valve (not shown). The refrigerant flows in from the upstream side of the refrigerant pipe. The configuration of the inflow-side connecting member 40 is not limited to that illustrated.

(heat exchanger path)
As described above, the left header tank 30 includes first space R1, second left space R2, third left space R3, and fourth left space R4. - Third left partition plates 33, 34, 35 are provided. Further, the right header tank 20 has first to third spaces for partitioning the inside of the right header tank 20 into a first right space S1, a second right space S2, a third right space S3 and a fourth right space S4. Right partition plates 23, 24 and 25 are provided. By dividing the insides of the left header tank 30 and the right header tank 20 into spaces R1 to R4 and S1 to S4, respectively, the first to eighth tubes 11 to 18 are divided into first to sixth paths PS1 to PS6. .

Specifically, the second tube 12 communicating with the right second space S2 and the left second space R2 constitutes the first path PS1. A second path PS2 is configured by the third tube 13 communicating with the left second space R2 and the right third space S3. A third path PS3 is configured by the fourth tube 14 communicating with the third right space S3 and the third left space R3. A fourth path PS4 is configured by the fifth tube 15 and the sixth tube 16 communicating with the third left space R3 and the fourth right space S4. A fifth path PS5 is configured by the seventh tube 17 and the eighth tube 18 communicating with the fourth right space S4 and the fourth left space R4. Further, a sixth path PS6 is configured by the first tube 11 communicating with the left first space R1 and the right first space S1.

A first pass PS1, a second pass PS2, a third pass PS3, a fourth pass PS4, a fifth pass PS5, and a sixth pass PS6 are positioned in this order from upstream to downstream in the refrigerant flow direction.

(Bypass piping)
A bypass pipe (metal pipe) 60 is provided in the left header tank 30 . The bypass pipe 60 is connected to a left first space (a space corresponding to the first space of the present invention) R1 and a left fourth space (a space corresponding to the second space of the present invention) R4 separated in the longitudinal direction, It extends in the front-rear direction. A rear end (one end) of the bypass pipe 60 is fixed to the left header tank 30 by brazing while being connected to the left first space R1. The front end (the other end) of the bypass pipe 60 is fixed to the left header tank 30 by brazing while being connected to the left fourth space R4.

Specifically, the bypass pipe 60 has three pipe constituent members in the front-rear direction, that is, a rear pipe constituent member (first pipe constituent member) 61, an intermediate pipe constituent member (second pipe constituent member) 62, and a front pipe constituent member. It is divided into constituent members (third pipe constituent members) 63, and is configured to be adjustable in length. The rear pipe constituent member 61, the intermediate pipe constituent member 62 and the front pipe constituent member 63 are arranged in the longitudinal direction along the longitudinal direction of the left header tank 30, and these pipe constituent members 61 to 63 form a single bypass. A pipe 60 is constructed. In this embodiment, the case where the bypass pipe 60 is divided into three pipe constituent members 61 to 63 in the front-rear direction will be described, but it may be divided into two pipe constituent members, or four pipe constituent members, for example. You may divide|segment into the above pipe structural members. The rear pipe constituent member 61, the intermediate pipe constituent member 62 and the front pipe constituent member 63 are made of aluminum alloy.

As shown in FIG. 4, a first connection port 30a is formed in a portion of the left header tank 30 corresponding to the left first space R1. The first connection port 30a communicates with the left first space R1. A second connection port 30b is formed in a portion of the left header tank 30 corresponding to the left fourth space R4. The second connection port 30b communicates with the left fourth space R4. Both the first connection port 30a and the second connection port 30b are circular. The first connection port 30a and the second connection port 30b open in the same direction (upward), and the opening direction intersects the center axis direction (front-rear direction) of the left header tank 30. It is a direction (specifically, an orthogonal direction). The first connection port 30a and the second connection port 30b have the same diameter. The diameters of the first connection port 30a and the second connection port 30b may be different, and the shapes may be different from each other.

Since the first connection port 30a and the second connection port 30b are open upward, the rear end portion of the bypass pipe 60 is inserted into the first connection port 30a in a direction that intersects the front-rear direction. A front end portion of the bypass pipe 60 is inserted into the second connection port 30b in a direction crossing the front-rear direction. A rear end portion and a front end portion of the bypass pipe 60 are press-fitted into the first connection port 30a and the second connection port 30b, respectively. The direction in which the first connection port 30a and the second connection port 30b open may be an oblique direction. It is inserted in a direction intersecting the front-rear direction with respect to 30b. In this embodiment, the insertion directions of the rear end and the front end of the bypass pipe 60 are the same, but they may be slightly different.

A first enlarged diameter portion 61a is formed on the rear pipe component 61 on the intermediate pipe component 62 side (front side). The first enlarged diameter portion 61a has a cylindrical shape with a central axis extending in the front-rear direction. The front end surface of the first enlarged diameter portion 61a is open forward, and the opening is circular.

A second enlarged diameter portion 63a is formed on the front pipe component 63 on the intermediate pipe component 62 side (rear side). The second enlarged diameter portion 63a has a cylindrical shape with a central axis extending in the front-rear direction. The second enlarged diameter portion 63a and the first enlarged diameter portion 61a are spaced apart from each other in the front-rear direction. The rear end surface of the second enlarged diameter portion 63a is open rearward, and the opening is circular.

The central axis of the second enlarged diameter portion 63a and the central axis of the first enlarged diameter portion 61a are arranged on the same straight line. That is, the rear portion of the rear pipe component 61 is a portion to be inserted into the first connection port 30a, and the front portion is the first enlarged diameter portion 61a. The central axis of the part and the central axis of the rear part intersect. Similarly, the front portion of the front pipe component 63 is a portion to be inserted into the second connection port 30b, and the rear portion is the second enlarged diameter portion 63a. The central axis of the front portion and the central axis of the rear portion intersect each other.

In order to correspond to this, the intermediate portion 61b between the front portion and the rear portion of the rear pipe constituent member 61 is bent, and the intermediate portion between the front portion and the rear portion of the front pipe constituent member 63 is bent. By bending the portion 63b, the central axis of the second enlarged diameter portion 63a and the central axis of the first enlarged diameter portion 61a are arranged on the same straight line.

As shown in FIGS. 5 to 7, the rear end of the rear pipe component 61 contacts the periphery of the first connection port 30a from the outside of the left header tank 30 to position it in the insertion direction. A first positioning portion 61c is provided for performing. The first positioning portion 61c is, for example, a projecting portion radially projecting from the outer surface of the rear pipe component 61. In this embodiment, the first positioning portion 61c extends continuously in the circumferential direction in an annular shape. may be intermittent.

Also, as shown in FIG. 4, the rear end of the rear pipe component 61 is a portion that is press-fitted into the first connection port 30a. is provided. The rib 61d is formed of a ridge that protrudes radially outward from the rear pipe component 61 and extends in the central axis direction of the rear end portion. In this embodiment, for example, three ribs 61d are provided at intervals in the circumferential direction of the rear end of the rear pipe component 61, but the number of ribs 61d may be four or more. By providing the rib 61d, the rear end of the rear pipe component 61 can be inserted into the first connection port 30a without increasing the force required to insert the rear end of the rear pipe component 61 into the first connection port 30a. 30a can be reliably press-fitted.

As shown in FIG. 4, the front end of the front pipe component 63 is provided with a second positioning portion that abuts against the peripheral edge of the second connection port 30b from the outside of the left header tank 30 to position it in the insertion direction. 63c is provided. The second positioning portion 63c is configured similarly to the first positioning portion 61c. Further, although not shown, ribs for press-fitting are provided on the outer surface of the front end portion of the front pipe constituent member 63 in the same manner as the rear end portion of the rear pipe constituent member 61 .

As shown in FIG. 4, the intermediate pipe component 62 is composed of a straight pipe extending straight. The outer diameter of the intermediate pipe constituting member 62 is set so that it can be inserted into the first enlarged diameter portion 61a and the second enlarged diameter portion 63a, and the length of the intermediate pipe constituting member 62 is at least With the rear end inserted into the first enlarged diameter portion 61a, at least the front end of the intermediate pipe constituting member 62 has a length that allows it to be inserted into the second enlarged diameter portion 63a.

As shown in FIG. 8, the intermediate pipe constituent member 62 is made of a clad material in which a brazing material 62b is clad on the outer surface of a circular tube material 62a made of an aluminum alloy. With the rear end portion of the intermediate pipe forming member 62 inserted into the first enlarged diameter portion 61a, the outer surface of the rear end portion of the intermediate pipe forming member 62 extends over the entire inner surface of the first enlarged diameter portion 61a. brazed. Further, in a state in which the front end portion of the intermediate pipe constituting member 62 is inserted into the second enlarged diameter portion 63a, the outer surface of the front end portion of the intermediate pipe constituting member 62 extends over the entire inner surface of the second enlarged diameter portion 63a. brazed. The outer diameter of the intermediate pipe component 62, the inner diameter of the first enlarged diameter portion 61a, and the inner diameter of the second enlarged diameter portion 63a are set so as to enable this brazing.

Before the brazing, the amount of insertion of the rear end portion of the intermediate pipe component 62 into the first enlarged diameter portion 61a can be changed. For example, if the length of the bypass pipe 60 is to be increased, the amount of insertion of the rear end portion of the intermediate pipe component 62 into the first enlarged diameter portion 61a is reduced, and conversely, the length of the bypass pipe 60 is to be shortened. In this case, the amount of insertion of the rear end portion of the intermediate pipe component 62 into the first enlarged diameter portion 61a is increased. Since the amount of insertion can be steplessly increased or decreased, the length of the bypass pipe 60 can be changed steplessly. The length of the bypass pipe 60 can be changed by similarly increasing or decreasing the amount of insertion of the front end portion of the intermediate pipe component 62 into the second enlarged diameter portion 63a.

The dimensions in the central axis direction of the first enlarged diameter portion 61a and the second enlarged diameter portion 63a can be set arbitrarily. That is, when the dimension in the central axis direction of the first enlarged diameter portion 61a and the second enlarged diameter portion 63a is increased, the length adjustment margin of the bypass pipe 60 is increased, and the brazing margin with the intermediate pipe constituent member 62 is also increased. Become. On the other hand, if the dimensions in the central axis direction of the first enlarged diameter portion 61a and the second enlarged diameter portion 63a are shortened, the length adjustment allowance of the bypass pipe 60 is reduced, and the brazing allowance with the intermediate pipe constituent member 62 is also reduced. Become. The dimensions of the first enlarged-diameter portion 61a and the second enlarged-diameter portion 63a in the central axis direction may be set so that the necessary amounts of length adjustment allowance and brazing allowance for the bypass pipe 60 can be secured. In this embodiment, the dimension in the central axis direction of the first enlarged diameter portion 61a and the second enlarged diameter portion 63a is, for example, 10 mm or more.

It should be noted that the rear end portion of the intermediate pipe constituting member 62 may be fixed to the first enlarged diameter portion 61a, and only the amount of insertion of the intermediate pipe constituting member 62 into the second enlarged diameter portion 63a may be changed. The front end portion of the component 62 may be fixed to the second enlarged diameter portion 63a, and only the amount of insertion of the intermediate pipe component 62 into the first enlarged diameter portion 61a may be changed.

(at the time of manufacture of the heat exchanger)
When manufacturing the heat exchanger 1, the first to eighth tubes 11 to 18, the right header tank 20, the left header tank 30, the partition plates 23 to 25, 33 to 35, the inflow side connection member 40, the outflow side connection member 50, Necessary parts such as the bypass pipe 60 are prepared. After that, the parts are assembled as shown in FIGS. At this time, the length of the left header tank 30 may vary within the tolerance range, and the distance between the first connection port 30a and the second connection port 30b formed in the left header tank 30 is also within the tolerance range. It may fluctuate. In addition, the lengths of the rear pipe component 61, the intermediate pipe component 62, and the front pipe component 63 that constitute the bypass pipe 60 may also vary within the tolerance range.

Therefore, the operator adjusts the length of the bypass pipe 60 for each heat exchanger 1 so as to correspond to the above variations. Specifically, the rear end portion and the front end portion of the bypass pipe 60 have lengths that can be easily inserted into the first connection port 30a and the second connection port 30b, respectively. The amount of insertion of the end portion into the first enlarged diameter portion 61a or the amount of insertion of the front end portion of the intermediate pipe component 62 into the second enlarged diameter portion 63a is determined, and the rear pipe is configured so as to achieve that amount of insertion. The member 61, the intermediate pipe constituent member 62 and the front pipe constituent member 63 are assembled. At this time, it is not necessary to cut a part of the bypass pipe 60, and the length can be easily adjusted.

Further, since the rear end portion and the front end portion of the bypass pipe 60 are press-fitted into the first connection port 30a and the second connection port 30b, respectively, the rear pipe component 61, the intermediate pipe component 62, and the front pipe component, which have been once assembled, can be separated from each other. 63 becomes difficult to separate from the left header tank 30 . Therefore, fixation with a jig or the like becomes unnecessary.

After that, the temporarily assembled heat exchanger 1 is conveyed into a brazing furnace and each part is brazed simultaneously. If the length of the left header tank 30 is changed, it can be dealt with by simply changing the length of the intermediate pipe component 62, and the rear pipe component 61 and the front pipe component 63 can be changed. No change required.

(Refrigerant flow)
In the heat exchanger 1 configured as described above, the refrigerant flows into the right second space S2 of the right header tank 20 through the inflow side connection member 40 . The refrigerant that has flowed into the right second space S<b>2 flows through the second tube 12 to the left, then flows into the left second space R<b>2 , and then flows through the third tube 13 . The refrigerant that has flowed through the third tube 13 to the right flows into the right third space S3 and then flows through the fourth tube 14 . The refrigerant that has flowed through the fourth tube 14 to the left flows into the left third space R<b>3 and then flows through the fifth tube 15 and the sixth tube 16 . The refrigerant that has flowed through the fifth tube 15 and the sixth tube 16 to the right flows into the right fourth space S4 and then flows through the seventh tube 17 and the eighth tube 18 . The refrigerant that has flowed left through the seventh tube 17 and the eighth tube 18 flows into the left fourth space R<b>4 and then into the bypass pipe 60 . After flowing into the first left space R1, the refrigerant that has flowed into the bypass pipe 60 flows through the first tube 11 to the right and then flows into the first right space S1. The coolant that has flowed into the right first space S1 flows out from the outflow side connection member 50 .

(Action and effect of the embodiment)
As described above, according to the present embodiment, the bypass pipe 60 is composed of the rear pipe component 61, the intermediate pipe component 62, and the front pipe component 63, and the intermediate pipe component 62 is the first enlarged diameter portion. The length of the bypass pipe 60 can be easily adjusted because it is inserted into the 61a or the second enlarged diameter portion 63a. As a result, the length of the bypass pipe 60 can be set to a length that can be connected to the left first space R1 and the left fourth space R4 of the left header tank 30. Even if an assembly error occurs, the error can be absorbed, and a high-quality heat exchanger 1 can be obtained.

The above-described embodiments are merely examples in all respects and should not be construed in a restrictive manner. Furthermore, all modifications and changes within the equivalent scope of claims are within the scope of the present invention.

INDUSTRIAL APPLICABILITY As described above, the heat exchanger according to the present invention can be used, for example, when cooling a battery or the like.

1 heat exchangers 11 to 18 first to eighth tubes 20 right header tank (second header tank)
23 to 25 1st to 3rd right partition plate 30 Left header tank (first header tank)
30a First connection port 30b Second connection ports 33-35 First to third left partition plates 60 Bypass pipe (metal pipe)
61 rear pipe component (first pipe component)
61a First expanded diameter portion 62 Intermediate pipe component (second pipe component)
63 front pipe component (third pipe component)
63a Second enlarged diameter portion R1 Left first space (first space)
R4 left fourth space (second space)

Claims (8)

A first header tank connected to one end of three or more tubes arranged in a predetermined direction and extending in the predetermined direction, and a second header tank connected to the other end of the tube and extending in the predetermined direction. in the heat exchanger,
In the first header tank and the second header tank, the inside of the first header tank and the second header tank are divided into a plurality of spaces, respectively, so that the tubes are arranged in the predetermined direction in three or more paths. A partition plate is provided to divide into
a metal pipe connected to the first space and the second space separated in the predetermined direction inside the first header tank and extending in the predetermined direction;
one end of the metal pipe is fixed to the first header tank while being connected to the first space;
The other end of the metal pipe is fixed to the first header tank while being connected to the second space,
A heat exchanger, wherein the metal pipe is divided into at least two or more pipe-constituting members in the predetermined direction so that the length thereof can be adjusted. The heat exchanger of claim 1, wherein
one end of the metal pipe is inserted into a first connection port formed in the first header tank in a direction crossing the predetermined direction;
A heat exchanger, wherein the other end of the metal pipe is inserted into a second connecting port formed in the first header tank in a direction crossing the predetermined direction. In the heat exchanger of claim 2,
The metal pipe has a first pipe component and a second pipe component arranged in the predetermined direction,
A tubular first enlarged diameter portion extending in the predetermined direction is formed on the first pipe member on the side of the second pipe member,
A heat exchanger, wherein the first pipe member side of the second pipe member is inserted into the first enlarged diameter portion. In the heat exchanger of claim 3,
The metal pipe has a third pipe component, and the first pipe component, the second pipe component, and the third pipe component are arranged in order in the predetermined direction,
A heat exchanger, wherein the second pipe member is a straight pipe. In the heat exchanger according to any one of claims 2 to 4,
A heat exchanger, wherein one end and the other end of the metal pipe are press-fitted into the first connection port and the second connection port, respectively. In the heat exchanger of claim 5,
One end and the other end of the metal pipe are in contact with the peripheral edge of the first connection port and the peripheral edge of the second connection port from the outside of the first header tank, respectively, in the insertion direction. A heat exchanger, comprising a positioning portion for positioning the heat exchanger. In the heat exchanger of claim 4,
A cylindrical second enlarged diameter portion extending in the predetermined direction is formed on the second pipe constituent member side of the third pipe constituent member,
The third pipe component side of the second pipe component is inserted into the second enlarged diameter portion,
A heat exchanger according to claim 1, wherein said second pipe-constituting member is made of a clad material having an outer surface clad with a brazing material. In the heat exchanger of claim 7,
The intermediate portions of the first pipe component and the second pipe component are bent such that the central axis of the first enlarged diameter portion and the central axis of the second enlarged diameter portion are positioned on the same straight line. A heat exchanger characterized by: