JP3740102B2 - Heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchanger configured to exchange heat between an internal fluid (for example, fuel) and an external fluid (for example, air).
[0002]
[Prior art]
As one of the heat exchangers, it is manufactured by integral extrusion of aluminum, and has a plurality of flow paths that are partitioned by a plurality of partition walls and have substantially the same cross-sectional shape in the width direction, A meandering flow path is formed by the core in which the flow path opens at the end, and the core is closely fixed to each end of the core, and the ends of the adjacent flow paths are alternately communicated with each other. An internal fluid that includes a pair of headers and flows from an inflow pipe provided in the header corresponding to one end of the serpentine passage toward an outflow pipe provided in the header corresponding to the other end of the serpentine passage; Some are configured to exchange heat between the core and an external fluid outside the headers.
[0003]
[Problems to be solved by the invention]
In the heat exchanger configured as described above, the cross-sectional shapes of a plurality of flow paths that are partitioned by a plurality of partition walls and formed in parallel in the width direction are substantially the same. The moldability (workability) of the core to be produced is good. However, the cross-sectional shapes of the first flow path and the final flow path of the meandering passage at both ends in the width direction of the core are conventionally the cross-sectional shapes of the inflow pipe and the outflow pipe. And the cross-sectional shape is the same), and the width direction dimension (opening diameter) of the inflow pipe and the outflow pipe is specified and large, the first flow path and the final The cross-sectional shape of each flow path including the flow path must be set large in accordance with the dimensions of each pipe, and the flow path of each flow path including the first flow path and the final flow path in the core within a predetermined width direction size. A large number cannot be set. In addition, when many flow paths cannot be set in the core, the total length of the meander path cannot be set long, and there is a possibility that sufficient heat exchange performance cannot be ensured.
[0004]
SUMMARY OF THE INVENTION
The present invention has been made in order to cope with the above-described problem, and in the heat exchanger having the above-described configuration, the meander that communicates with the first flow path of the meander passage that communicates with the inflow pipe and the outflow pipe. Along the final flow path of the passage, an auxiliary inflow path and an auxiliary outflow path having substantially the same cross-sectional shape as each of the flow paths are set in parallel in the width direction, and the first flow path and The auxiliary inflow path is communicated at least at the outflow side end, the final flow path and the auxiliary outflow path are communicated at least at the inflow side end, and the outflow side end of the inflow pipe is connected to the first flow path. wherein toward the inlet side end portion of the auxiliary inlet channel is opened, the inlet side end portion of the outflow pipe is opened towards the outlet side end portion of the auxiliary outflow channel and the final channel and, and the first The width direction dimension by the flow path and the auxiliary inflow path is The width direction of the first pipe and the auxiliary inflow passage is made to substantially match the thickness direction dimension of the inflow pipe, and the width direction of the final flow passage and the auxiliary outflow passage The dimensions are substantially the same as the dimension in the width direction of the outflow pipe, and the thickness direction dimensions of the final flow path and the auxiliary outflow path are substantially equal to the thickness direction dimension of the outflow pipe . In this case, the first flow path and the outflow side end of the auxiliary inflow path, and the final flow path and the inflow side end of the auxiliary outflow path may communicate with each other through a single meandering passage. desirable.
[0005]
In this heat exchanger, the internal fluid flows from the outflow side end of the inflow pipe through the inflow pipe to the first flow path of the meandering passage and the inflow side end of the auxiliary inflow passage. It flows from the outflow side end of the inflow passage to the second passage of the meandering passage, sequentially passes through the second passage of the meandering passage from the last passage to the final passage of the meandering passage. Flows to the inflow side end of the channel and the auxiliary outflow channel , flows from the final flow path of the meandering passage and the outflow side end of the auxiliary outflow channel to the inflow side end of the outflow pipe. Exchanged.
[0006]
By the way, in this heat exchanger, the width direction dimension by the 1st flow path and the auxiliary inflow path is made to substantially coincide with the width direction dimension of the inflow pipe, and the thickness direction dimension of the first flow path and the auxiliary inflow path is set to the thickness of the inflow pipe. The width direction dimension of the final flow path and the auxiliary outflow path is made to substantially match the width direction dimension of the outflow pipe, and the thickness direction dimension of the final flow path and the auxiliary outflow path is substantially equal to the thickness direction dimension of the outflow pipe. match, the outlet side end portions of the inlet pipe towards the inlet side end portion of the first flow path and the auxiliary inlet passage is opened, the outflow end of the inflow end of the outflow pipe and the final passage the auxiliary outlet passage It is opened toward the part . For this reason, in this heat exchanger, the width direction dimension of each flow path formed in the core is the width of the inflow pipe and the outflow pipe (usually, the inflow pipe and the outflow pipe are of the same size). For example, by setting the direction dimension (opening diameter) to approximately 1/2 (in the case of an embodiment in which one auxiliary inflow passage and one auxiliary outflow passage are provided), the meandering passage in the core within a predetermined width direction size It is possible to set many flow paths for Therefore, it is possible to increase the overall length of the meandering passage and improve the heat exchange performance.
[0007]
The width direction dimension of each flow path formed in the above-described core is, for example, approximately 1/3 of the width direction dimension of the inflow pipe and the outflow pipe (in the case of an embodiment in which two auxiliary inflow paths and two auxiliary outflow paths are provided), or Ru can also der be implemented by setting approximately 1/4 (in the embodiment where the auxiliary inlet passage and the auxiliary outflow channel to provide three, respectively).
[0008]
Further, in this heat exchanger, the cross-sectional shapes of the auxiliary inflow passage and the auxiliary outflow passage formed in the core are substantially the same as the cross-sectional shapes of the flow passages constituting the meandering passage. The moldability of the core manufactured in this way is not impaired.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows a first embodiment in which the present invention is applied to a heat exchanger 10 that is a fuel cooler for an automobile that cools fuel by air (running wind). 2 and 3 show one header 12 of the heat exchanger 10 in detail, and FIGS. 4 and 5 show the other header 13 of the heat exchanger 10 in detail.
[0010]
The heat exchanger 10 shown in FIG. 1 is divided by 19 partition walls 11a1 to 11a19 (the reference numerals 11a4 to 11a16 are not shown in FIG. 1), and 20 linear flows having substantially the same cross-sectional shape. The passages P1 to P20 (references P4 to P17 are not shown in FIG. 1) are provided in parallel in the width direction, and the flow paths P1 to P20 are provided at both ends in the front-rear direction (vertical direction in FIG. 1). And a pair of headers 12 and 13 that are brazed in a state of being fitted to each end portion of the core 11 and firmly fixed.
[0011]
Further, in the heat exchanger 10 shown in FIG. 1, the inflow pipe 14 is brazed to the inflow port 12 a provided in one header 12 in a state where the inflow pipe 14 is fitted, and is firmly fixed. The outflow pipe 15 is brazed to the outflow port 12b provided in the header 12 in a state where the outflow pipe 15 is fitted and is firmly fixed.
[0012]
The core 11 is integrally formed by extrusion molding of aluminum, has 19 partition walls 11a1 to 11a19 in the vertical direction inside the peripheral wall 11b, and protrudes in the vertical direction outside and above the peripheral wall 11b. A plurality of fins (not shown) extending in the front-rear direction along P20 are provided. The thickness direction dimensions (vertical direction dimensions in FIGS. 2 and 4) of the flow paths P1 to P20 formed in the core 11 are set so as to substantially match the thickness direction dimensions of the inflow pipe 14 and the outflow pipe 15. Yes.
[0013]
In this core 11, notches 11c are provided on the header 13 side of the first partition 11a1, the even-numbered partitions 11a2,... 11a18, and the nineteenth partition 11a19, and the odd-numbered partitions except for the first and nineteenth. 11a3 ... 11a17 is provided with a notch 11d on the header 12 side. The notches 11c and 11d are formed by cutting out the corresponding portions of the partition walls 11a1 to 11a19 after the core 11 is formed.
[0014]
Therefore, in the core 11, the ends of the adjacent flow paths are alternately communicated with each other in the second flow path P2 to the 19th flow path P19, and the core 11 and the headers 12, 13 The meandering flow path Pa is formed, the second flow path P2 is the first flow path of the meandering flow path Pa communicating with the inflow pipe 14, and the nineteenth flow path P19 is communicating with the outflow pipe 15. This is the final flow path of the path Pa. Further, the first flow path P1 communicates with the inflow pipe 14, and is an auxiliary inflow path that communicates with the first flow path (second flow path P2) of the meandering flow path Pa at the outflow side end. The flow path P20 communicates with the outflow pipe 15 and is an auxiliary outflow path that communicates with the final flow path (the 19th flow path P19) of the meandering flow path Pa at the inflow side end.
[0015]
Each header 12, 13 is formed by press molding using a clad metal clad with a material of the core 11 and an aluminum brazing material having good brazing properties on one side of the aluminum base material (inner side joined to the end of the core 11). Is formed. The portions 12c and 13c joined to the end portions of the partition walls 11a1 to 11a19 in the headers 12 and 13 have a flat plate shape.
[0016]
In the heat exchanger 10 of the first embodiment configured as described above, the outflow side end of the inflow pipe 14 has a first flow path (second flow path P2) of a meandering flow path Pa and an auxiliary inflow path (first 1 is opened toward the inflow side end of the first flow path P1), and the inflow side end of the outflow pipe 15 is the final flow path (the 19th flow path P19) of the meandering flow path Pa and the auxiliary outflow path (the 20th flow path). It opens toward the outflow side end of the flow path P20).
[0017]
For this reason, in this heat exchanger 10, the internal fluid flows through the inflow pipe 14 from the outflow side end of the inflow pipe 14 to the first flow path (P2) and the auxiliary inflow path (P1) of the meander path Pa. The meandering passage flows from the first passage and the auxiliary inflow passage of the passage Pa to the second passage (P3) of the meandering passage Pa, and sequentially passes from the second passage of the meandering passage Pa to the last passage (P18). It flows from the flow path before the final Pa to the final flow path (P19) and the auxiliary outflow path (P20) of the meandering path Pa, and flows from the final flow path and the auxiliary outflow path of the meandering path Pa to the inflow side end of the outflow pipe 15. During this time, heat is exchanged between the core 11 and the external fluid (air) flowing along the headers 12 and 13.
[0018]
By the way, in this heat exchanger 10, the width direction dimension by the 1st flow path (P2) and the auxiliary | assistant inflow path (P1) is made to correspond substantially to the width direction dimension of the inflow pipe 14, and an auxiliary | assistant flow path and the 1st flow path (P2) The dimension in the thickness direction of the inflow channel (P1) is made to substantially match the dimension in the thickness direction of the inflow pipe 14, and the size in the width direction of the final channel (P19) and the auxiliary outflow channel (P20) is substantially matched to the dimension in the width direction of the outflow pipe 15. The thickness direction dimensions of the final flow path (P19) and the auxiliary outflow path (P20) are substantially matched with the thickness direction dimensions of the outflow pipe 15, and the outflow side end portion of the inflow pipe 14 is auxiliary to the first flow path (P2). towards inlet channel (P1) is opened, the inlet side end portions of the outlet pipe 15 toward the top Tsuiryuro (P19) and the auxiliary outflow channel (P20) is obtained by opening. For this reason, in this heat exchanger 10, the width direction dimension of each flow path P1-P20 formed in the core 11 is made into the inflow pipe 14 and the outflow pipe 15 (usually the inflow pipe and the outflow pipe are pipes of the same size. The number of flow paths for the meandering passage Pa can be set in the core 11 within a predetermined width direction size. Is possible. Therefore, it is possible to increase the overall length of the meandering passage Pa and improve the heat exchange performance.
[0019]
Moreover, in this heat exchanger 10, the cross-sectional shape of the auxiliary | assistant inflow path (P1) and auxiliary | assistant outflow path (P20) formed in the core 11 is substantially the same as the cross-sectional shape of each flow path P2-P19 which comprises the meander path Pa. Since it is the same, the moldability of the core 11 manufactured by the extrusion integral molding of aluminum is not impaired.
[0020]
Moreover, in the heat exchanger 10 mentioned above, it can implement without providing the partition walls (refer to the partition walls 22c and 23c provided in each header 22 and 23 of 2nd Embodiment mentioned later) in each header 12 and 13. FIG. It is possible to change the manufacturing method of the headers 12 and 13 from casting, die casting or forging to press molding, so that the cost can be reduced and the headers 12 and 13 can be downsized. The thickness can be reduced, and the heat exchanger 10 can be reduced in weight.
[0021]
Further, in the heat exchanger 10 described above, the metal material of each of the headers 12 and 13 is excellent in brazing properties with the material of the core 11 on one side of the aluminum base material (the inner side joined to the end of the core 11). Since the clad metal clad with the aluminum brazing is employed, it is possible to facilitate the brazing operation when the core 11 and the headers 12 and 13 are firmly fixed, thereby improving workability.
[0022]
FIG. 6 schematically shows a second embodiment in which the present invention is implemented in a heat exchanger 20 that is a fuel cooler for an automobile that cools fuel with air (running wind). 7 and 8 show one header 22 of the heat exchanger 20 in detail, and FIGS. 9 and 10 show the other header 23 of the heat exchanger 20 in detail.
[0023]
The heat exchanger 20 shown in FIG. 6 is divided by 19 partition walls 21a1 to 21a19 (reference numerals 21a4 to 21a16 are not shown in FIG. 6), and 20 linear flows having substantially the same cross-sectional shape. The passages P1 to P20 (references P4 to P17 are not shown in FIG. 6) are provided in parallel in the width direction, and the flow paths P1 to P20 are provided at both ends in the front-rear direction (vertical direction in FIG. 6). And a pair of headers 22 and 23 that are brazed in a state of being fitted to each end portion of the core 21 and firmly fixed.
[0024]
In the heat exchanger 20 shown in FIG. 6, the inlet 22a provided on one header 22 is brazed in a state where the inlet pipe 24 is fitted and closely fixed, The outlet 22 b provided in the header 22 is brazed in a state where the outflow pipe 25 is fitted and is firmly fixed.
[0025]
The core 21 is integrally formed by extrusion molding of aluminum, has 19 partition walls 21a1 to 21a19 in the vertical direction inside the peripheral wall 21b, and protrudes in the vertical direction outside and above the peripheral wall 21b. A plurality of fins (not shown) extending in the front-rear direction along P20 are provided. The thickness direction dimensions (vertical direction dimensions in FIGS. 7 and 9) of the flow paths P1 to P20 formed in the core 21 are set so as to substantially match the thickness direction dimensions of the inflow pipe 24 and the outflow pipe 25. Yes.
[0026]
Each header 22, 23 is formed by casting, die casting, forging, or the like. One header 22 has an inflow port 22a and an outflow port 22b, and has nine partition walls 22c. Each partition wall 22c is joined to the header 22 side end of each even-numbered partition wall 21a2 ... 21a18. Has been. The other header 23 has eight partition walls 23c, and each partition wall 23c is joined to the header 23 side end of each odd-numbered partition wall 21a3... 21a17 except the first and nineteenth. Yes.
[0027]
For this reason, in this heat exchanger 20, in the 2nd flow path P2-the 19th flow path P19, the edge part of each adjacent flow path is communicating alternately, and the core 21 and both headers 22, The meandering flow path Pa is formed by 23, the second flow path P2 is the first flow path of the meandering flow path Pa communicating with the inflow pipe 24, and the nineteenth flow path P19 communicates with the outflow pipe 25. This is the final flow path of the meandering flow path Pa. Further, the first flow path P1 communicates with the inflow pipe 24 and is an auxiliary inflow path that communicates with the first flow path (second flow path P2) of the meandering flow path Pa at the outflow side end. This flow path P20 communicates with the outflow pipe 25 and is an auxiliary outflow path that communicates with the final flow path (the 19th flow path P19) of the meandering flow path Pa at the inflow side end.
[0028]
In the heat exchanger 20 of the second embodiment configured as described above, the outflow side end of the inflow pipe 24 has a first flow path (second flow path P2) of a meandering flow path Pa and an auxiliary inflow path (first 1 is opened toward the inflow side end of the first flow path P1), and the inflow side end of the outflow pipe 25 is the final flow path (the 19th flow path P19) of the meandering flow path Pa and the auxiliary outflow path (the 20th flow path). It opens toward the outflow side end of the flow path P20).
[0029]
For this reason, in this heat exchanger 20, the internal fluid flows through the inflow pipe 24 from the outflow side end of the inflow pipe 24 to the first flow path (P2) and the auxiliary inflow path (P1) of the meander path Pa. The meandering passage flows from the first passage and the auxiliary inflow passage of the passage Pa to the second passage (P3) of the meandering passage Pa, and sequentially passes from the second passage of the meandering passage Pa to the last passage (P18). It flows from the flow path before the final Pa to the final flow path (P19) and the auxiliary outflow path (P20) of the meandering path Pa, and flows from the final flow path and the auxiliary outflow path of the meandering path Pa to the inflow side end of the outflow pipe 25. During this period, heat is exchanged between the core 21 and the external fluid (air) flowing along the headers 22 and 23.
[0030]
Incidentally, in this heat exchanger 20, the width direction dimension that by the first flow path (P2) and the auxiliary inlet passage (P1) substantially aligned in the width direction dimension of the inlet pipe 24, the first flow path (P2) And the dimension in the thickness direction of the auxiliary inflow passage (P1) substantially coincide with the dimension in the thickness direction of the inflow pipe 24, and the width direction dimension by the final flow path (P19) and the auxiliary outflow path (P20) becomes the width direction dimension of the outflow pipe 25. The thickness direction dimensions of the final flow path (P19) and the auxiliary outflow path (P20) are substantially matched with the thickness direction dimensions of the outflow pipe 25, and the outflow side end of the inflow pipe 24 is the first flow path (P2). towards the auxiliary inlet passage (P1) and is opened, the inlet side end portions of the flow pipe 25 is obtained by open toward the top Tsuiryuro (P19) and the auxiliary outflow channel (P20). For this reason, in this heat exchanger 20, the width direction dimensions of the respective flow paths P1 to P20 formed in the core 21 are set such that the inflow pipe 24 and the outflow pipe 25 (usually, the inflow pipe and the outflow pipe have the same dimensions). The number of flow paths for the meandering passage Pa can be set in the core 21 within a predetermined width direction size. Is possible. Therefore, it is possible to increase the overall length of the meandering passage Pa and improve the heat exchange performance.
[0031]
Moreover, in this heat exchanger 20, the cross-sectional shape of the auxiliary | assistant inflow path (P1) and auxiliary | assistant outflow path (P20) formed in the core 21 is substantially the same as the cross-sectional shape of each flow path P2-P19 which comprises the meander path Pa. Since it is the same, the moldability of the core 21 manufactured by the extrusion integral molding of aluminum is not impaired.
[0032]
In each said embodiment, although this invention was implemented to the heat exchangers 10 and 20 which are the 20 flow paths P1-P20 formed in the cores 11 and 21, this invention is the number of flow paths formed in a core. However, the present invention is not limited to the above embodiments. In addition, the effect by this invention is acquired effectively, so that there are many flow paths formed in a core.
[0033]
In each of the above embodiments, the width direction dimension of each flow path formed in the cores 11 and 21 is set to approximately ½ of the width direction dimension of the inflow pipes 14 and 24 and the outflow pipes 15 and 25. Although implemented, the widthwise dimension of each flow path formed in the core is approximately 1/3 of the widthwise dimension of the inflow pipe and outflow pipe (in the case of an embodiment in which two auxiliary inflow paths and two auxiliary outflow paths are provided) or Ru can also der be implemented by setting approximately 1/4 (in the embodiment where the auxiliary inlet passage and the auxiliary outflow channel to provide three, respectively).
[0034]
In each of the above embodiments, the present invention is applied to a fuel cooler for an automobile that cools fuel by air (running wind). However, the present invention is similarly or appropriately changed to other various heat exchangers. However, the present invention is not limited to the above embodiments. Moreover, in each said embodiment, although the inflow pipes 14 and 24 and the outflow pipes 15 and 25 were provided in one header 12 and 22, it implemented, the inflow pipe or the outflow pipe was provided in one header, and the other header was provided. It is also possible to provide an outflow pipe or an inflow pipe.
[0035]
Moreover, in the said 1st Embodiment, although each notch 11c, 11d is formed by notching the applicable site | part of each partition 11a1-11a19 after shaping | molding of the core 11, the applicable site | part of each partition 11a1-11a19 It is also possible to form the cutouts 11c and 11d by bending and folding.
[Brief description of the drawings]
FIG. 1 is a cross-sectional plan view schematically illustrating a first embodiment of a heat exchanger according to the present invention.
2 is a front view of one header shown in FIG. 1. FIG.
FIG. 3 is a bottom view of one header shown in FIG. 2;
4 is a front view of the other header shown in FIG. 1. FIG.
5 is a bottom view of the other header shown in FIG. 4. FIG.
FIG. 6 is a cross-sectional plan view schematically illustrating a second embodiment of the heat exchanger according to the present invention.
7 is a front view of one header shown in FIG. 6. FIG.
FIG. 8 is a central cross-sectional plan view of one of the headers shown in FIG.
9 is a front view of the other header shown in FIG. 6. FIG.
10 is a central transverse plan view of the other header shown in FIG. 9. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Heat exchanger, 11 ... Core, 11a1-11a19 ... Partition, 11b ... Peripheral wall, 11c, 11d ... Notch, 12 ... One header, 12a ... Inlet, 12b ... Outlet, 13 ... Other header, 14 ... Inflow pipe, 15 ... outflow pipe, Pa ... meandering path, P1 ... flow path (auxiliary inflow path), P2 ... first flow path, P19 ... final flow path, P20 ... flow path (auxiliary outflow path), P4-P18 ... Flow path.

Claims (2)

Produced by one-piece extrusion molding of aluminum, it has a plurality of flow paths that are partitioned by a plurality of partition walls and have substantially the same cross-sectional shape in parallel in the width direction, and each of these flow paths opens at the end. And a pair of headers that are closely fixed to each end of the core and that alternately communicate with the ends of the adjacent flow paths to form a meandering flow path with the core, An internal fluid that flows from an inflow pipe provided in the header corresponding to one end of the serpentine passage toward an outflow pipe provided in the header corresponding to the other end of the serpentine passage, and outside the core and both headers In a heat exchanger configured to exchange heat with an external fluid, along a first flow path of the meandering passage communicating with the inflow pipe and a final flow path of the meandering path communicating with the outflow pipe The cross section of each flow path Auxiliary inflow passage and auxiliary outflow passage having substantially the same cross-sectional shape as the shape are respectively set in parallel in the width direction, and the first flow passage and the auxiliary inflow passage are communicated at least at the outflow side end, The final flow path and the auxiliary outflow path are communicated at least at the inflow side end, and the outflow side end of the inflow pipe is opened toward the inflow side end of the first flow path and the auxiliary inflow path. The inflow side end of the outflow pipe is opened toward the outflow side end of the final flow path and the auxiliary outflow path , and the width dimension of the first flow path and the auxiliary inflow path is defined as the inflow pipe. The thickness direction dimension of the first flow path and the auxiliary inflow passage is substantially matched with the thickness direction dimension of the inflow pipe, and the width direction dimension by the final flow path and the auxiliary outflow passage is Approximately equal to the widthwise dimension of the outflow pipe Heat exchanger, characterized in that is substantially coincident with the thickness direction dimension of the final passage the auxiliary outflow channel in the thickness dimension of the outflow pipe. The heat exchanger according to claim 1, wherein the first flow path and the outflow side end of the auxiliary inflow path, and the final flow path and the inflow side end of the auxiliary outflow path are formed in a single meandering path. A heat exchanger characterized in that it communicates with each other.

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