WO2015098468A1 - Heat exchanger - Google Patents

Abstract

A sloped surface which is sloped so that the width of a refrigerant flow passage in the Y-direction increases toward the upstream side is formed on the second tank-side wall of an adaptor and/or the inlet section of the first tank, and the opening end of the upstream-most tube among tubes is located on the sloped surface side with respect to the center of the width of the refrigerant passage in the Y-direction, at a position on the downstream side of a line extended from the sloped surface into the refrigerant flow passage.

Description

Heat exchanger

The present invention relates to a heat exchanger applied to a vehicle.

The heat exchanger of Patent Document 1 includes an upper header, a lower header, a flat tube disposed between both headers, and a refrigerant inlet pipe connected and joined to one end opening of the lower header. The end portion of the tube is inserted into the tube insertion hole of each header, and the intermediate portion in the width direction protrudes into the header.

The heat exchanger of Patent Document 2 is provided with a pipe connection portion composed of a cap member and a joint member on the end face of the inlet tank on the external pipe side. The cap member includes a flat portion that forms a tank end surface on the external piping side, and a cylindrical portion that is erected from the flat portion. The joint member includes a fitting hole that can be fitted to the cylindrical portion and a pipe abutting portion on which an external pipe abuts. The joint member is formed in a stepped cylindrical shape whose inner and outer diameters change stepwise.

JP-A-8-210788 JP 2011-196570 A

However, in the heat exchanger of Patent Document 1, since the end portion of the tube protrudes into the header, the main flow of the refrigerant collides with the end portion of the tube arranged on the most refrigerant inlet pipe side, Erosion tends to occur at the end of the tube. In the heat exchanger of Patent Document 2, since the joint member is formed in a stepped cylindrical shape, the flow path resistance of the refrigerant increases.

An object of the present invention is to provide a heat exchanger capable of improving the durability of a tube while suppressing an increase in the flow path resistance of the refrigerant.

One aspect of the present invention includes a first tank having a longitudinal direction in a first direction, a second tank arranged in parallel in a second direction perpendicular to the first direction with respect to the first tank, and a first tank, And a plurality of tubes respectively communicating with the second tank. In this heat exchanger, an inlet for introducing the refrigerant into the first tank is provided at the end of the first tank in the first direction. An adapter for connecting a pipe for supplying a refrigerant is provided at the inlet. The first tank and the adapter define a refrigerant flow path extending in the first direction, and each of the plurality of tubes has an open end located in the refrigerant flow path of the first tank. The wall on the second tank side of at least one of the inlet portion and the adapter is provided with an inclined surface that is inclined so that the width in the second direction of the refrigerant channel increases toward the upstream side. The opening end of the tube arranged on the most upstream side among the plurality of tubes is positioned on the inclined surface side from the center of the width in the second direction of the refrigerant flow path, and is inclined to extend into the refrigerant flow path Located downstream of the surface extension.

In this heat exchanger, an inclined surface that inclines so that the width in the second direction of the refrigerant flow path increases toward the upstream side on the inlet of the first tank and the wall on the second tank side of at least one of the adapters. An inclination in which the opening end of the tube disposed at the most upstream side among the plurality of tubes extends from the center of the width in the second direction of the refrigerant channel to the inclined surface side and into the refrigerant channel. Since it is located downstream of the extended line of the surface, it gives momentum away from the opening end of the tube to the refrigerant flow downstream of the inclined surface, so that the main flow of the refrigerant directly collides with the opening end of the tube. It can prevent, and it can suppress that erosion generate | occur | produces in the opening edge part of a tube. Moreover, since the inclined surface is inclined so that the width in the second direction of the refrigerant flow path increases toward the upstream side, an increase in the flow resistance of the refrigerant can be suppressed. Therefore, according to this heat exchanger, it is possible to improve the durability of the tube while suppressing an increase in the flow path resistance of the refrigerant.

The inclined surface may be provided in an adapter, the adapter may be provided with an abutting portion with which the tip of the pipe abuts, and the inclined surface may be provided downstream of the abutting portion.

The opening on the first tank side of the adapter is decentered in the second direction with respect to the opening on the piping side of the adapter, and the inclination angle of the inclined surface with respect to the first direction is determined by the refrigerant flow path. It may be set larger than the inclination angle with respect to the first direction of the surface located on the opposite side of the inclined surface across the surface.

The first tank includes the inlet portion and a main body portion extending from the downstream end portion of the inlet portion in the first direction, and the inclined surface extends from the downstream end portion of the inlet portion. It may extend upstream.

The first tank is composed of a first tank member to which the plurality of tubes are connected, and a second tank member arranged to face the first tank member in the second direction, and the inclined tank The surface may be provided on the first tank member.

A connecting member may be fixed to the inlet portion, and the adapter may be connected to the inlet portion via the connecting member.

FIG. 1 is a front view of a heat exchanger according to the first embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a main part of the heat exchanger of FIG. FIG. 3 is an enlarged cross-sectional view of a main part of a heat exchanger according to the second embodiment of the present invention. FIG. 4 is an enlarged cross-sectional view of a main part of a heat exchanger according to the third embodiment of the present invention. FIG. 5 is a front view of the adapter of the heat exchanger of FIG. FIG. 6 is a side view of piping connected to the heat exchanger according to the embodiment of the present invention. FIG. 7 is an enlarged cross-sectional view of a main part of a heat exchanger according to another example of the third embodiment of the present invention. FIG. 8: is a principal part expanded sectional view of the heat exchanger which concerns on the other example of 3rd Embodiment of this invention. FIG. 9 is a front view of the adapter of the heat exchanger of FIG. FIG. 10 is an enlarged cross-sectional view of a main part of a heat exchanger according to another example of the third embodiment of the present invention. FIG. 11 is a front view of the adapter of the heat exchanger of FIG. FIG. 12 is an enlarged cross-sectional view of a main part of a heat exchanger according to the fourth embodiment of the present invention. FIG. 13 is a front view of the adapter of the heat exchanger of FIG.

Hereinafter, a heat exchanger according to an embodiment of the present invention will be described with reference to the drawings. The same or similar elements are denoted by the same or similar reference numerals, and detailed description thereof is omitted. Further, the drawings are schematic, and the relationship and ratio of each dimension may be different from the actual ones, and may not be consistent between the drawings. In addition, terms such as “up and down” and “horizontal” in the following description are defined for convenience in order to describe the positional relationship of each part, and the actual mounting orientation of the apparatus is not limited to this. Absent.

<First Embodiment>
The first embodiment will be described with reference to FIGS. 1 and 2.

The heat exchanger 1 according to the present embodiment includes a pair of upper tank (first tank) 3A and lower tank (second tank) 3B through which hot water as a refrigerant flows, an upper tank 3A, and a lower tank 3B. And a plurality of tubes 7 communicating with each other. The upper tank 3A and the lower tank 3B are spaced apart from each other in the vertical direction (second direction) shown as the Y direction in the figure, and are each in the horizontal direction (first direction) shown as the X direction in the figure. Has a longitudinal direction. In the following description, the horizontal direction is referred to as the X direction, and the vertical direction is referred to as the Y direction.

The plurality of tubes 7 are juxtaposed in the X direction between the pair of tanks 3A and 3B, and each extend in the Y direction. Both ends of each tube 7 are connected to the upper tank 3A and the lower tank 3B, respectively. Each tube 7 has an open end 5 located in the refrigerant flow path of the upper tank 3A.

The upper tank 3A is provided at one end in the X direction of the upper tank 3A and is substantially constant in the X direction from the inlet portion 4 for introducing warm water into the upper tank 3A and the downstream end portion 9 of the inlet portion 4. It is comprised from the main-body part 6 extended in cross-sectional shape. The inlet portion 4 is provided with an adapter 31 for connecting a pipe 203 for supplying hot water. The upper tank 3A together with the adapter 31 defines a refrigerant flow path extending in the X direction.

In this embodiment, an inclined surface 15 is provided on the wall on the lower tank 3B side of the inlet portion 4 so that the width of the refrigerant flow path in the Y direction gradually increases toward the upstream side. The inclined surface 15 exhibits a linear shape in a cross section orthogonal to the X direction and the Y direction. And the opening end part 5 of the tube 7 arranged closest to the inlet part 4 among the plurality of tubes 7, that is, arranged on the most upstream side, is an extension line of the inclined surface 15 extending into the upper tank 3A. It is located on the outer peripheral side of the refrigerant flow from L.

Here, “the outer peripheral side of the refrigerant flow from the extension line L” means the lower tank 3B side or a range below the extension line L when the inclined surface 15 is provided in the upper tank 3A. In the present embodiment, the open end 5 of the tube 7 positioned closest to the inlet 4 is positioned on the inclined surface 15 side from the center of the width of the refrigerant flow path in the Y direction, and is an extension line L of the inclined surface 15. It is located further downstream.

The upper tank 3A is divided in the longitudinal direction of the tube 7, that is, the Y direction. The lower tank member (first tank member) 13 to which the plurality of tubes 7 are connected, and the lower tank member 13 in the Y direction. It is comprised from the upper tank member (2nd tank member) 11 arrange | positioned facing. The inclined surface 15 is provided in the lower tank member 13 and extends upstream from the downstream end 9 of the inlet 4.

As shown in FIG. 1, hot water such as cooling water flowing through the engine is introduced into the upper tank 3A, for example. At one end side in the longitudinal direction of the upper tank 3A, there is provided a refrigerant introduction portion 19 to which a pipe 203 (see FIG. 6) through which hot water flows into the upper tank 3A is connected.

Moreover, the hot water that has flowed into the upper tank 3A is introduced into the lower tank 3B through the plurality of tubes 7. At one end side in the longitudinal direction of the lower tank 3B, there is provided a refrigerant discharge portion 21 to which a pipe (not shown) for circulating the hot water flowing into the lower tank 3B to the engine is connected.

The upper tank 3A and the lower tank 3B are composed of an upper tank member 11 and a lower tank member 13 that are divided by a dividing surface 23 in the longitudinal direction of the tube 7 (here, the Y direction). The upper tank member 11 and the lower tank member 13 are fixed to each other by brazing in a state where the dividing surfaces 23 are combined, and constitute one tank.

The lower tank member 13 of the upper tank 3A and the upper tank member 11 of the lower tank 3B are provided with a plurality of assembly holes 25 that are through holes at equal intervals along the longitudinal direction of each tank. The upper tank 3 </ b> A and the lower tank 3 </ b> B communicate with each other via the plurality of tubes 7 by inserting the opening ends 5 and 5 of the plurality of tubes 7 into the plurality of assembly holes 25.

The plurality of tubes 7 are arranged at equal intervals along the longitudinal direction of each tank between the tanks 3A and 3B. The open end portions 5 and 5 of each tube 7 are inserted into the assembly holes 25 of the upper tank 3A and the lower tank 3B, and inward from the inner wall surfaces of the upper tank 3A and the lower tank 3B (in the refrigerant flow path). Projects for a predetermined length.

The opening ends 5 and 5 of the tube 7 projecting into the tanks 3A and 3B are engaged with the edge of the assembly hole 25 by being widened, thereby preventing the tube 7 from coming off from the tanks 3A and 3B. Is made and temporarily assembled. After temporary assembly, the tube 7 is fixed to the tanks 3A and 3B by brazing.

As described above, the open end portions 5 and 5 of the tube 7 are protruded from the assembly holes 25 into the tanks 3A and 3B, thereby improving the assembling property of the tubes 7 to the tanks 3A and 3B.

A heat exchanging member 27 composed of a plurality of fins is provided between the plurality of tubes 7. Through this heat exchange member 27, heat exchange is performed between the hot water flowing inside the tube 7 and the cooling air flowing outside the tube 7 from the upper tank 3A, and the cooled hot water flows into the lower tank 3B. To do.

In addition, like this heat exchanger 1, a system in which warm water is introduced into the upper tank 3A, the plurality of tubes 7 are circulated, and the warm water is discharged from the lower tank 3B is referred to as a one-pass system.

In the one-pass heat exchanger 1, hot water flowing inside the plurality of tubes 7 is introduced from the refrigerant introduction part 19 of the upper tank 3A. The refrigerant introduction portion 19 is provided with an inlet portion 4 that is an opening on one end side in the longitudinal direction of the upper tank 3A.

A plate-like connecting member 29 is fixed inside the inlet portion 4. The adapter 31 is connected to the inlet portion 4 via a connecting member 29. A circular through hole having an opening cross-sectional area larger than the opening cross-sectional area of the downstream end 9 of the inlet portion 4 is provided in the central portion of the connecting member 29. One end side of the cylindrical adapter 31 is inserted into the through-hole, and the inserted portion is pushed and expanded in the radial direction with a jig or the like, and the adapter 31 is caulked to the connecting member 29. Thereby, the adapter 31 is fixed to the inlet portion 4.

The other end of the adapter 31 is reduced in diameter by a jig or the like in a state where the pipe 203 for supplying hot water is inserted, and is caulked to the pipe 203. As a result, the pipe 203 is fixed to the adapter 31.

The hot water introduced into the upper tank 3A from the inlet 4 is sequentially introduced into a plurality of tubes 7 arranged along the longitudinal direction of the tank 3A. Therefore, the flow rate of the hot water introduced into the tube 7 closest to the inlet portion 4 is the largest, and the flow rate of the hot water introduced into the tube 7 decreases as the distance from the inlet portion 4 increases.

For this reason, in the refrigerant introduction part 19, when the width in the Y direction of the inlet part 4 is the same as that of the main body part 6, the opening end part 5 of the tube 7 projects into the tank 3 </ b> A. The main flow of hot water strongly collides with the open end 5 of the tube 7 adjacent to 4. For this reason, erosion tends to occur at the open end 5 of the tube 7 due to long-term use.

The refrigerant introduction part 19 is provided with a width reduction part 17. In the present embodiment, the reduced width portion 17 is provided in the upper tank member 11 and the lower tank member 13 that constitute the refrigerant introduction portion 19 of the upper tank 3A. The lower tank member 13 has an inclined surface 15 that is inclined so that the width in the Y direction of the refrigerant flow path gradually increases from the downstream end 9 of the inlet 4 toward the upstream. The upper tank member 11 also has an inclined surface 16 that inclines so that the width in the Y direction of the refrigerant channel gradually increases from the downstream end 9 of the inlet 4 toward the upstream.

Since the inclined surfaces 15 and 16 are flat and smooth inclined surfaces extending from the downstream end 9 of the inlet portion 4 toward the upstream side, it is possible to suppress an increase in flow resistance of the hot water. it can.

For example, in the lower narrowing portion 17, as shown by the arrow in FIG. 2, a part of the hot water introduced into the inlet portion 4 flows along the inclined surface 15, so that the refrigerant flows into the hot water flow leaving the inclined surface 15. A directionality toward the center region in the Y direction of the flow path can be given (momentum is given). Thereby, the main flow of the warm water downstream of the inclined surface 15 is formed in a relatively narrow range in the central region in the Y direction of the refrigerant flow path.

The opening end portion 5 of the tube 7 arranged closest to the inlet portion 4 is located on the lower tank 3B side, that is, on the lower side from the extension line L of the lower inclined surface 15 extending into the upper tank 3A. Is located.

For this reason, it is possible to prevent the main flow of hot water having the highest flow rate from colliding violently with the opening end 5 of the tube 7 and to suppress the occurrence of erosion of the opening end 5 of the tube 7 due to long-term use. The durability of the tube 7 can be improved.

Further, in the heat exchanger 1, the upper tank member 11 and the lower tank member 13 are inclined so that the width in the Y direction of the refrigerant flow path increases from the downstream end 9 of the inlet 4 toward the upstream. Since the width reduction part 17 which has the surfaces 15 and 16 is provided, the main flow of the warm water downstream from the inclined surfaces 15 and 16 is formed in the narrower range of the Y direction center area | region.

In addition, the inclined surfaces 15 and 16 of the reduced width portion 17 gradually have a width in the Y direction of the refrigerant flow path from the downstream end portion 9 of the inlet portion 4 having the same cross-sectional shape as the main body portion 6 toward the upstream side. Therefore, it is possible to suppress the narrowing of the inlet portion 4 and to suppress the increase in the flow resistance of the hot water. In addition, the inclined surfaces 15 and 16 are inclined so that the width in the Y direction of the refrigerant flow path is increased from the downstream end portion 9 of the inlet portion 4 toward the upstream side, and therefore flow along the inclined surfaces 15 and 16. The resistance of the hot water flow can be suppressed, and the increase in the channel resistance can be suppressed.

Furthermore, the open end 5 of the tube 7 communicating with the upper tank 3A located on the inlet 4 side is located on the lower tank 3B side (here, the extended line L extending from the lower inclined surface 15 into the upper tank 3A). Therefore, the main flow of hot water flowing along the inclined surface 15 and introduced into the upper tank 3A can be prevented from directly colliding with the open end 5 of the tube 7, and the open end of the tube 7 can be prevented. The occurrence of erosion in the part 5 can be suppressed.

Therefore, in the heat exchanger 1, since it can suppress that erosion generate | occur | produces in the opening end part 5 of the tube 7, suppressing the increase in flow path resistance of warm water, durability of the tube 7 can be improved. it can.

Further, by making the reduced width portions 17 provided in both tank members 11 and 13 symmetrical, the upper tank member 11 and the lower tank member 13 can be formed by one mold or the like, and the upper tank 3A. The manufacturing cost can be reduced.

Second Embodiment
A second embodiment will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted. In addition, from the same structure as 1st Embodiment, the effect similar to 1st Embodiment can be acquired.

As shown in FIG. 3, in the heat exchanger 101 according to this embodiment, the width reducing portion 17 is provided only in the lower tank member 13. That is, the upper tank 3A includes a lower tank member 13 to which a plurality of tubes 7 are connected, and an upper tank member 11 that is disposed to face the lower tank member 13 in the Y direction. The lower tank member 13 is provided only. The height (Y direction width) of the inlet portion 4 of the upper tank member 11 is equal to the height (Y direction width) of the main body portion 6. The inclined surface 15 extends upstream from the downstream end 9 of the inlet 4 of the lower tank member 13.

Since the connecting member 29 and the adapter 31 are attached to the inlet portion 4 as in the first embodiment, the length in the X direction of the inlet portion 4 and the width in the Y direction of the opening of the inlet portion 4 are the same as those in the first embodiment. It is set to be equivalent to those of the inlet portion 4. Therefore, the inclination angle of the inclined surface 15 is set larger than the inclination angle when the reduced width portion 17 is provided in both the upper tank member 11 and the lower tank member 13 as in the first embodiment.

For this reason, the piping 203 (see FIG. 6) is arranged on the lower side with respect to the main body portion 6, and the hot water introduced into the inlet portion 4 flows in from the lower side. 3 has an inclined surface 15 inclined at a larger inclination angle, and therefore, as shown by an arrow in FIG. 3, the hot water flow leaving the inclined surface 15 has a stronger directivity (large momentum) toward the central region in the Y direction of the refrigerant flow path. ). Thereby, the main flow of the hot water downstream of the inclined surface 15 is formed in a narrower range of the upper area in the Y direction of the refrigerant flow path (area farther from the opening end 5 of the tube 7).

The opening end 5 of the tube 7 disposed closest to the inlet 4 is positioned on the lower tank 3B side (here, the lower side) with respect to the extended line L of the inclined surface 15 extending into the upper tank 3A. is doing. Therefore, it is possible to prevent the main flow of hot water having the highest flow rate from directly colliding with the opening end 5 of the tube 7 and to suppress the occurrence of erosion of the opening end 5 of the tube 7 due to long-term use. .

Moreover, in the heat exchanger 101, since the width reduction part 17 is provided in the lower tank member 13, the main stream of the hot water introduce | transduced into the inlet part 4 is the lower tank member 13 side rather than that of 1st Embodiment. However, the inclined surface 15 can give the main stream of hot water a stronger direction toward the upper tank member 11 (giving momentum).

Further, since the upper tank member 11 is not provided with the reduced width portion 17, the upper layout of the inlet portion 4 of the upper tank member 11 becomes an empty space, and the arrangement layout of the peripheral members arranged around the heat exchanger 101. The degree of freedom can be improved.

<Third Embodiment>
A third embodiment will be described with reference to FIGS.

In the heat exchanger 201 according to the present embodiment, an adapter 205 for connecting a pipe 203 for supplying hot water to the upper tank 3A is provided at the longitudinal end of the upper tank 3A. The wall on the lower tank 3B side of the adapter 205 is provided with an inclined surface 15 that is inclined so that the width in the Y direction of the refrigerant flow path gradually increases toward the pipe 203 side (upstream side). .

And the opening end part 5 of the tube 7 arrange | positioned most upstream among the some tubes 7 connected to the upper tank 3A is the outer peripheral side of a refrigerant | coolant flow from the extension line L of the inclined surface 15 extended in the upper tank 3A. Is located. That is, the open end 5 of the tube 7 located closest to the inlet 4 is located on the inclined surface 15 side from the center of the width of the refrigerant flow path in the Y direction, and is downstream of the extension line L of the inclined surface 15. Is located.

The adapter 205 is provided with an abutting portion 207 with which the tip end of the pipe 203 abuts, and an inclined surface 15 is provided on the downstream side of the abutting portion 207.

Furthermore, a connecting member 29 is fixed inside the inlet portion 4 of the upper tank 3A, and the adapter 205 is connected to the inlet portion 4 of the upper tank 3A via the connecting member 29.

In addition, the same code | symbol is attached | subjected to the structure same as other embodiment, and a structure and functional description shall refer to other embodiment, and it abbreviate | omits, but from the structure same as another embodiment, it is others. The same effect as that of the embodiment can be obtained.

As shown in FIGS. 4 and 5, the inlet portion 4 of the upper tank 3 </ b> A has a fixed portion 209 whose width in the Y direction of the refrigerant passage gradually increases from the downstream end portion 9 of the inlet portion 4 toward the upstream side. Is provided. The connecting member 29 is fixed inside the fixing portion 209.

The outer peripheral shape of the connecting member 29 is formed to be equivalent to the shape of the inner peripheral surface of the fixed portion 209. An elongated through hole having a width in the Y direction larger than the width in the Y direction of the downstream end portion 9 of the inlet portion 4 is provided in the central portion of the connecting member 29. One end side of the adapter 205 is inserted into the through hole, and the inserted portion is pushed and expanded in the radial direction with a jig or the like, and the adapter 205 is crimped to the connecting member 29. As a result, the adapter 205 is fixed to the inlet portion 4, and the gap between the inlet portion 4 and the adapter 205 is closed by the connecting member 29.

The outer peripheral shape of the connecting member 29, which is a plate-like member, is easy to form in accordance with the shape of the inner peripheral surface of the fixed portion 209, so that the upper side of the connection member 29 is compared with the case where the adapter 205 is directly brazed to the tip of the inlet portion 4. Formation of a gap between the tank 3A and the adapter 205 can be prevented. That is, by fixing the adapter 205 to the inlet portion 4 via the connecting member 29, it is possible to more reliably prevent the warm water from leaking.

The adapter 205 includes a tank side opening 211 provided on one end side and a pipe side opening 213 provided on the other end side. The tank side opening 211 is inserted into the through hole of the connecting member 29 and connected to the inlet portion 4 of the upper tank 3A. The pipe side opening 213 has a diameter larger than the Y direction width of the tank side opening 211, and the pipe 203 is inserted into the diameter. Between the tank side opening 211 and the pipe side opening 213 of the adapter 205, an inclined surface 15 is provided so that the Y-direction width of the refrigerant flow path gradually increases toward the pipe 203 side (upstream side). It has been. Further, an abutting portion 207 formed in a step shape is provided on the inner peripheral surface of the adapter 205, and the tip of the pipe 203 is abutted against the abutting portion 207.

This adapter 205 inserts the tank side opening 211 into the through hole of the connecting member 29 and caulks the end of the tank side opening 211 so as to expand the diameter with a jig or the like, thereby connecting the upper tank 3A via the connecting member 29. It is fixed to the inlet part 4.

The adapter 205 fixed to the upper tank 3A is inserted into the pipe side opening 213 until the end of the pipe 203 comes into contact with the abutting part 207. At this time, a flange portion 215 is provided on the outer periphery of the pipe 203, and the end surface of the flange portion 215 is provided inside the adapter 205 on the upstream side of the refrigerant flow of the abutting portion 207. 217 abuts.

In a state where the pipe 203 is inserted into the adapter 205, the outer periphery of the engaging portion 219 provided with the pipe side opening 213 located on the most upstream side of the refrigerant flow of the adapter 205 is caulked inward with a jig or the like. As a result, the pipe 203 is prevented from coming off, and the pipe 203 is connected to the upper tank 3 </ b> A via the adapter 205.

The dimension of the tank side opening 211 of the adapter 205 is set to be substantially the same as the dimension of the downstream end 9 of the inlet 4 of the upper tank 3A. By setting in this way, narrowing of the tank side opening 211 can be suppressed, and an increase in the flow path resistance of the refrigerant flowing from the pipe 203 toward the upper tank 3A can be suppressed.

The inclined surface 15 provided on the downstream side of the abutting portion 207 of the adapter 205 is flat and smooth so that the Y-direction width of the refrigerant channel gradually increases from the tank side opening 211 toward the abutting portion 207. It has become a serious aspect. For this reason, the increase in the channel resistance of warm water can be suppressed.

The inclined surface 15 guides the hot water introduced from the pipe 203 through the tank side opening 211 to the refrigerant flow path of the upper tank 3A along the inclined surface 15, and the hot water flowing away from the inclined surface 15 flows into the Y of the refrigerant flow path. Gives directionality toward the direction center area (gives momentum). Thereby, the main flow of the hot water downstream of the inclined surface 15 is formed in a relatively narrow range of the central region in the Y direction of the refrigerant flow path.

The opening end 5 of the tube 7 arranged on the most upstream side with respect to the inclined surface 15 is a lower tank 3B (outer side of the refrigerant flow than an extended line L of the inclined surface 15 extending into the upper tank 3A. 1 side), here the lower side. That is, the opening end 5 of the tube 7 located on the most upstream side is located on the inclined surface 15 side from the center of the width of the refrigerant flow path in the Y direction, and is located on the downstream side of the extension line L of the inclined surface 15. is doing.

For this reason, it is possible to prevent the main flow of hot water having the highest flow rate from directly colliding with the opening end 5 of the tube 7, and to suppress the occurrence of erosion of the opening end 5 of the tube 7 due to long-term use. The durability of the tube 7 can be improved.

In the heat exchanger 201, the adapter 205 for connecting the pipe 203 is provided with an inclined surface 15 that is inclined so that the Y-direction width of the refrigerant flow path gradually increases toward the pipe 203 side. Therefore, hot water that flows along the inclined surface 15 and then travels toward the center region in the Y direction of the refrigerant flow path is introduced into the upper tank 3A.

Further, the inclined surface 15 gradually increases in the Y-direction width of the refrigerant flow path from the tank side opening 211 having a dimension substantially equal to the dimension of the downstream end 9 of the inlet 4 of the upper tank 3A toward the pipe 203 side. Therefore, it is possible to suppress the narrowing of the flow path cross section of the refrigerant flow path, and to suppress an increase in the flow path resistance of the refrigerant. In addition, since the inclined surface 15 is a flat and smooth surface, resistance to the hot water flowing along the inclined surface 15 can be suppressed, and an increase in flow path resistance of the hot water can be suppressed.

Furthermore, the open end 5 of the tube 7 arranged on the most upstream side among the plurality of tubes 7 communicating with the upper tank 3A is on the outer peripheral side of the refrigerant flow from the extension line L of the inclined surface 15 extending into the upper tank 3A. Therefore, the main flow of hot water introduced into the upper tank 3A can be prevented from directly colliding with the opening end 5 of the tube 7, and the occurrence of erosion at the opening end 5 of the tube 7 can be suppressed. can do.

Therefore, in the heat exchanger 201, it is possible to suppress the occurrence of erosion at the opening end portion 5 of the tube 7 while suppressing an increase in the flow path resistance of the refrigerant, so that the durability of the tube 7 can be improved. it can.

Moreover, in the heat exchanger 201, since the inclined surface 15 is provided downstream from the abutting portion 207 of the adapter 205, the inclined surface 15 immediately moves toward the central region in the Y direction with respect to the hot water flowing out from the pipe 203. It is possible to impart directionality (provide momentum), and more reliably prevent the main flow of hot water from directly colliding with the opening end 5 of the tube 7.

Further, since the adapter 205 is connected to the upper tank 3A via a connecting member 29 fixed to the inlet 4 of the upper tank 3A, it is easy to prevent the formation of a gap between the upper tank 3A and the adapter 205. It is possible to more reliably prevent the refrigerant from leaking.

Here, as in the heat exchanger 301 shown in FIG. 7, in addition to the fixing portion 209 of the upper tank member 11, a fixing portion 303 may be provided in the lower tank member 13 at the inlet portion 4 of the upper tank 3A. In the fixing portion 303, the width of the refrigerant flow path in the Y direction gradually increases from the downstream end portion 9 of the inlet portion 4 toward the adapter 205 side. The connecting member 29 is fixed inside these fixing portions 209 and 303.

By fixing the tank side opening 211 of the adapter 205 in the through hole of the connecting member 29, the dimensions of the tank side opening 211 (for example, the width in the Y direction and the cross-sectional area of the flow path) are changed to the refrigerant flow in the main body 6 of the upper tank 3A. It can be set larger than the dimension of the path (for example, the width in the Y direction or the cross-sectional area of the flow path), and the increase in the flow path resistance of the refrigerant can be further suppressed.

The fixing portions 209 and 303 for fixing the connecting member 29 may be provided only in the lower tank member 13. For example, like the heat exchanger 401 shown in FIG. 8, the fixing portion 209 is provided at the end of the upper tank 3A. , 303 may be fixed, and the tank side opening 211 of the adapter 205 shown in FIG. 9 may be fixed to the through hole of the connection member 29.

According to the heat exchanger 401, the shape of the end of the upper tank 3A can be simplified. Further, by using the connecting member 29, the adapter 205 can be fixed to various types of the upper tank 3A, and the versatility of the adapter 205 can be improved.

On the other hand, unlike the heat exchanger 501 shown in FIG. 10, the fixing portions 209 and 303 are not provided at the end of the upper tank 3A, but the fixing portion 503 is provided at the end of the adapter 205 shown in FIG. A tank side opening 211 having an opening shape matching the outer shape of the end portion of the inlet portion 4 of the upper tank 3A is provided at 503, and the end portion of the inlet portion 4 of the upper tank 3A is inserted into the tank side opening 211. The upper tank 3A and the adapter 205 may be brazed.

According to the heat exchanger 501, by designing the shape of the fixing portion 503 of the adapter 205 to the shape of the end portion of the inlet portion 4 of the upper tank 3A, the design of the end portion of various types of the upper tank 3A can be designed. The adapter 205 can be fixed without changing.

Also in the heat exchangers 301, 401, 501, the adapter 205 is provided with the inclined surface 15, and the opening end portion 5 of the tube 7 located on the most upstream side among the plurality of tubes 7 communicating with the upper tank 3A. Is positioned on the outer peripheral side of the refrigerant flow from the extension line L of the inclined surface 15 extending into the upper tank 3A. That is, the open end 5 of the tube 7 positioned on the upstream side is positioned on the inclined surface 15 side from the center of the width of the refrigerant flow path in the Y direction, and is positioned on the downstream side of the extension line L of the inclined surface 15. ing.

For this reason, in heat exchanger 301,401,501, since it can suppress that erosion generate | occur | produces in the opening end part 5 of the tube 7, suppressing the increase in the flow path resistance of a refrigerant | coolant, durability of the tube 7 is carried out. Can be improved.

<Fourth embodiment>
The fourth embodiment will be described with reference to FIGS.

The adapter 603 is provided in the heat exchanger 601 according to the present embodiment. A tank-side opening 211 that is an opening on the upper tank 3 </ b> A side of the adapter 603 is eccentric in the Y direction with respect to a pipe-side opening 213 that is an opening on the pipe 203 side of the adapter 603. That is, the center position of the tank side opening 211 is shifted in the Y direction with respect to the center position of the pipe side opening 213.

The inclination angle of the inclined surface 15 with respect to the X direction is larger than the inclination angle with respect to the X direction of the surface located on the opposite side of the inclined surface 15 across the refrigerant flow path. That is, the inclination angle of the inner peripheral surface between the abutting portion 207 and the fixing portion 503 of the adapter 603 with respect to the X direction (here, the coolant flow direction) is the inclination angle of the inner peripheral surface other than the inclined surface 15. The inclination angle of the inclined surface 15 is set to be larger than that.

In addition, the same code | symbol is attached | subjected to the structure same as other embodiment, and a structure and functional description shall refer to other embodiment, and it abbreviate | omits, but from the structure same as another embodiment, it is others. The same effect as that of the embodiment can be obtained.

As shown in FIGS. 12 and 13, the adapter 603 is brazed directly to the upper tank 3A by inserting the end of the inlet portion 4 of the upper tank 3A into the tank side opening 211 provided in the fixed portion 503. Yes. Note that the adapter 603 may be fixed to the upper tank 3A via the connecting member 29 (see FIG. 2).

In the adapter 603, the piping side opening 213 is provided eccentrically in the Y direction with respect to the tank side opening 211. Specifically, the center of the tank side opening 211 is located above the center of the pipe side opening 213, that is, the center of the adapter 603.

The pipe 203 (see FIG. 6) connected to the adapter 603 is arranged on the lower side with respect to the inlet 4 of the upper tank 3A.

The pipe-side opening 213 of the adapter 603 is decentered in the Y direction with respect to the tank-side opening 211, and the inclination angle of the inclined surface 15 with respect to the X direction is located on the opposite side of the inclined surface 15 across the refrigerant flow path ( 12 and 13, the inclination angle with respect to the X direction of the surface located above the inclined surface 15 is larger. That is, the inclination angle of the inner peripheral surface between the abutting portion 207 and the fixing portion 503 of the adapter 603 with respect to the X direction (here, the coolant flow direction) is the inclination angle of the inner peripheral surface other than the inclined surface 15. The inclination angle of the inclined surface 15 is set to be larger than that.

For this reason, when the hot water flows along the inclined surface 15, the main flow of the hot water flows downstream of the inclined surface 15 with a directionality (momentum) in a direction away from the opening end 5 of the tube 7.

Also in this embodiment, the open end 5 of the tube 7 arranged on the most upstream side is the lower tank 3B (FIG. 1), which is the outer peripheral side of the refrigerant flow from the extended line L of the inclined surface 15 extending into the upper tank 3A. It is located on the (reference) side (here, the lower side). Accordingly, it is possible to prevent the main flow of the hot water having the highest flow rate from directly colliding with the opening end 5 of the tube 7 disposed on the most upstream side, and erosion of the opening end 5 of the tube 7 due to long-term use can be prevented. Can be suppressed.

On the other hand, of the inner peripheral surface between the abutting portion 207 of the adapter 603 and the fixing portion 503, the surface located on the opposite side of the inclined surface 15 across the refrigerant flow path is the tank side opening 211 of the pipe side opening 213. The inclination angle with respect to the refrigerant flow is set to be very small (here, substantially horizontal).

In this way, in the adapter 603, by setting the inclination angle on the upper tank member 11 side opposite to the lower tank member 13 where the opening end portion 5 of the tube 7 is located, an empty space above and below the heat exchanger 601. Space can be provided.

Thereby, for example, a peripheral member such as a case for housing the heat exchanger 601 can be reduced in size, and the degree of freedom of the layout of the peripheral members disposed around the heat exchanger 601 can be improved. .

That is, in the heat exchanger 601, the pipe-side opening 213 of the adapter 603 is eccentric with respect to the tank-side opening 211, so that the inclination angle of the inclined surface 15 with respect to the X direction is opposite to the inclined surface 15 across the refrigerant flow path. The inclination angle with respect to the X direction of the surface located on the side is larger.

For this reason, when the hot water flows along the inclined surface 15, the main flow of the hot water downstream of the inclined surface 15 can have a directionality in a direction away from the opening end 5 of the tube 7 (giving momentum). Further, the occurrence of erosion at the open end 5 of the tube 7 can be further suppressed.

Further, since the inclination angle of the portion other than the inclined surface 15 is set to be small, the upper and lower portions of the heat exchanger 601 become empty spaces, and the layout of the peripheral members arranged around the heat exchanger 601 is free. The degree can be improved.

In the heat exchanger according to the above-described embodiment, since one tank provided with the refrigerant introduction portion is provided on the upper side, an extension line in which the opening end portion of the tube extends from the inclined surface into the one tank. Located on the lower side. However, when one tank provided with the refrigerant introduction portion is provided on the lower side, the opening end of the tube is located above the extended line extending from the inclined surface into the one tank. .

In this way, even if the refrigerant introduction part is arranged in any tank, the opening end of the tube is arranged on the outer peripheral side of the refrigerant flow from the extended line of the inclined surface extending into one tank. The collision between the main flow of the refrigerant and the open end of the tube can be prevented.

In addition, in the heat exchanger according to the embodiment of the present invention, the inclined surface is provided in the lower tank member because the open end of the tube is connected to the lower tank member.

For this reason, when one tank provided with the refrigerant introduction portion is arranged on the lower side, the opening end portion of the tube is connected to the upper tank member, so that an inclined surface is provided on the upper tank member. become.

That is, when one tank provided with the refrigerant introduction part is disposed on the lower side, the upper tank member exhibits the same function as the lower tank member in the above embodiment. Thereby, the same effect as the heat exchanger in this embodiment can be acquired.

The heat exchanger according to the above embodiment includes, for example, a heater core that warms the cooling air by heat exchange between the refrigerant flowing through the tube and the cooling air, a radiator that cools the refrigerant by heat exchange between the refrigerant flowing through the tube and the cooling air, and the like. Any form of heat exchanger may be used.

Further, the heat exchanger adopts a one-pass method, but is not limited to this, and a two-pass method or more as long as it is configured to protrude in a direction in which the opening end of the tube intersects the main flow of the refrigerant. Even in the case of a heat exchanger, the configuration of the present invention can be applied.

This application claims priority based on Japanese Patent Application No. 2013-268755 filed on December 26, 2013 and Japanese Patent Application No. 2014-227774 filed on November 10, 2014. The entire contents of these applications are hereby incorporated by reference.

According to the present invention, it is possible to obtain a heat exchanger capable of improving the durability of the tube while suppressing an increase in the flow path resistance of the refrigerant.

1,101,201,301,401,501,601 Heat exchanger 3A Upper tank (first tank)
3B Lower tank (second tank)
4 Inlet 5 Open End 6 Body 7 Tube 9 Downstream End of Inlet 11 Upper Tank Member (Second Tank Member)
13 Lower tank member (first tank member)
DESCRIPTION OF SYMBOLS 15 Inclined surface 17 Decreasing part 29 Connecting member 31,205,603 Adapter 203 Piping 207 Butting part 211 Tank side opening 213 Piping side opening L Extension line

Claims (6)

A first tank having a longitudinal direction in a first direction;
A second tank arranged side by side in a second direction orthogonal to the first direction with respect to the first tank;
A plurality of tubes respectively communicating with the first tank and the second tank;
With
An inlet for introducing a refrigerant into the first tank is provided at an end of the first tank in the first direction,
The inlet is provided with an adapter for connecting a pipe for supplying the refrigerant,
The first tank and the adapter define a refrigerant flow path extending in the first direction;
Each of the plurality of tubes has an open end located in the refrigerant flow path of the first tank;
The wall on the second tank side of at least one of the inlet portion and the adapter is provided with an inclined surface that is inclined so that the width in the second direction of the refrigerant channel increases toward the upstream side. ,
An opening end portion of a tube arranged on the most upstream side among the plurality of tubes is located on the inclined surface side from the center of the width in the second direction of the refrigerant flow path, and in the refrigerant flow path. A heat exchanger located downstream of the extended line of the inclined surface. The inclined surface is provided on the adapter,
2. The heat exchanger according to claim 1, wherein the adapter is provided with an abutting portion with which the tip of the pipe abuts, and the inclined surface is provided downstream of the abutting portion. The opening on the first tank side of the adapter is eccentric in the second direction with respect to the opening on the piping side of the adapter,
3. The heat exchange according to claim 2, wherein an inclination angle of the inclined surface with respect to the first direction is larger than an inclination angle with respect to the first direction of a surface located on the opposite side of the inclined surface across the refrigerant flow path. vessel. The first tank includes the inlet portion and a main body portion extending in the first direction from a downstream end portion of the inlet portion,
The heat exchanger according to claim 1, wherein the inclined surface extends upstream from a downstream end of the inlet portion. The first tank is composed of a first tank member to which the plurality of tubes are connected, and a second tank member arranged to face the first tank member in the second direction,
The heat exchanger according to claim 4, wherein the inclined surface is provided in the first tank member. A connecting member is fixed to the inlet portion,
The heat exchanger according to any one of claims 1 to 5, wherein the adapter is connected to the inlet portion via the connecting member.

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