JP2008082672A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger having a side plate 4 with flexibility to follow deformation caused by applied thermal stress while having moderate pressure-proof rigidity. <P>SOLUTION: A curved surface part 44 between a bottom face part 41 and a sidewall part 42 is provided with a plurality of slits 45 arranged zigzag in a longitudinal direction so that their positions do not overlap in a width direction. While leaving the sidewall part 42 for keeping rigidity as it is, the curved surface part 44 which connects the sidewall part 42 and the bottom face part 41 is provided with the plurality of slits 45 to relieve the applied thermal stress. Further, since the slits 45 are arranged zigzag in the longitudinal direction so that their positions do not overlap in the width direction, there is no part which is extremely low in rigidity to the applied thermal stress, and the applied thermal stress can be dispersed to the bottom face part 41 as well as the sidewall part 42 to obtain a structure resistant to bending in the laminated direction of tubes compared with conventional products. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat exchanger, and more particularly to a heat exchanger having a U-shaped side plate (also referred to as a reinforcement or an insert) at both ends for reinforcing a core portion.

  So-called multi-flow heat exchangers such as radiators, oil coolers, intercoolers, condensers, etc. are arranged at the core part consisting of multiple tubes and fins joined to the outer surface of the tube, and at the end of this core part. The side plate is configured to include a side plate that reinforces the core portion, and a header tank that communicates with the plurality of tubes and to which the plurality of tubes and the side plates are joined.

  At this time, the fluid to be heat exchanged in the tube, that is, engine coolant, lubricating oil, pressurized combustion air, etc. flows, while the side plate is only exposed to the atmosphere. Therefore, in addition to the fact that the temperature of the tube and the temperature of the side plate are likely to be different, even if the specific heat is the same for the tube and the side plate, the difference in the heat capacity due to the difference in the mass. Therefore, the expansion amount of the tube and the expansion amount of the side plate are different.

  And, due to the difference between the expansion amount of the tube and the expansion amount of the side plate, thermal stress accompanying thermal strain is likely to occur in the vicinity of the portion where the side plate is joined and the portion where the tube is joined in the header tank. If the temperature is changed repeatedly and the thermal stress is changed repeatedly, the vicinity of the portion where the side plate is joined may be fatigued. On the other hand, for example, in Patent Document 1 below, the side plate is divided at an optimal division position to alleviate the three-dimensional bending deformation of the side plate, so that the vicinity of the portion where the side plate is joined is fatigued. This has been prevented.

  Further, when the temperature difference between the temperature of the fluid flowing into the tube and the cooling air is very large, the fluid flowing in the upstream side of the cooling air flow out of the fluid flowing in the tube flows in the downstream side of the cooling air flow. Since the temperature of the cooling air is higher than that of the fluid, the fluid flowing in the upstream side of the cooling air flow out of the fluid flowing in the tube is cooled more than the fluid flowing in the downstream side of the cooling air flow, and the cooling air flow in one tube A large temperature difference occurs between the upstream side and the cooling air flow downstream side.

  For this reason, when focusing only on the tube, the temperature of the tube on the downstream side of the cooling air flow is higher than the temperature of the tube on the upstream side of the cooling air flow, so that the tube will extend so as to bend toward the upstream side of the cooling air flow. And On the other hand, for example, in Patent Document 2 below, the first slit extending from the forward end of the cooling air in the flow direction toward the backward side, and the forward end from the backward end of the cooling air in the flow direction. The 2nd slit extended toward is provided in the zigzag form in the longitudinal direction of the side plate.

As a result, the side plate can be expanded and contracted so as to bend easily in the flow direction of the cooling air, so when the tube is about to bend toward the upstream side of the flow of the cooling air, The side plate can also extend so as to bend toward the upstream side of the flow of the cooling air, and the thermal stress generated in the vicinity of the portion where the side plate is joined can be relieved.
JP 2006-52866 A JP 2005-156068 A

  FIG. 13 is a schematic diagram illustrating a problem in the side plate of Patent Document 1. In this side plate, by providing the slit 55 in a direction perpendicular to the longitudinal direction, the slit 55 becomes a base point against thermal strain in the tube stacking direction, stress concentration occurs in the vicinity of the slit 55, and the side plate fatigues and breaks. There is a risk.

  Further, in the side plate of Patent Document 2, since the side wall portion formed by folding both sides in the width direction is easily cut and bent, the rigidity as a reinforcing member is reduced. There is a risk of passing.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to have a flexibility capable of following deformation due to applied thermal stress while having an appropriate pressure-resistant rigidity. An object of the present invention is to provide a heat exchanger having a side plate.

  Another object of the present invention is to provide a heat exchanger capable of preventing breakage due to thermal stress.

  Still another object of the present invention is to provide a heat exchanger including a side plate having high rigidity with respect to a direction in which the side surface of the heat exchanger is curved.

  Still another object of the present invention is to provide flexibility to the side plate extension and side plate twist corresponding to the longitudinal direction of the tube, and to bend the side plate along the tube stacking direction. Is to provide a heat exchanger having a side plate exhibiting high rigidity.

In order to achieve the above object, the present invention employs the following technical means. That is, in the invention according to claim 1, the core portion (3) having a plurality of tubes (31) extending in a direction intersecting the flow direction of the heat exchange fluid,
A side plate (4) disposed at both ends of the core (3) and extending in parallel with the longitudinal direction of the tube (31) to reinforce the core (3);
A plurality of tubes (31) and tank portions (2, 23) connected to the longitudinal ends of the plurality of tubes (31) and the side plates (4), in communication with the plurality of tubes (31),
The side plate (4) is a heat exchanger including a bottom surface portion (41) formed in the longitudinal direction and a side wall portion (42) formed by folding in the width direction of the bottom surface portion (41).
A plurality of slits (45, 46, 47, 48, 49, 50, 51) are arranged in the side plate (4) in a distributed manner with respect to the longitudinal direction of the side plate (4).

  According to the first aspect of the present invention, since the plurality of slits (45, 46, 47, 48, 49, 50, 51, 52, 53) are distributed, the stress concentration in the bending direction is alleviated. can do.

  Moreover, in invention of Claim 2, in the heat exchanger of Claim 1, in the bending curved-surface part (44) between the bottom face part (41) and side wall part (42) of a side plate (4). A plurality of slits (45) are provided, and the slits (45) are arranged in a staggered manner in the longitudinal direction so that the positions do not overlap in the width direction.

  According to the second aspect of the present invention, the side wall (42) for maintaining rigidity is left as it is, and the curved surface (44) connecting the side wall (42) and the bottom (41) is slit ( 45) is provided to relieve the applied thermal stress. In this way, by providing a plurality of slits (45), it is possible to disperse stress, and it is possible to provide a side plate (4) that is more resistant to bending in the tube stacking direction than conventional products.

  Furthermore, the plurality of slits (45) are arranged in a staggered manner in the longitudinal direction so that the positions do not overlap in the width direction, so that a portion having extremely low rigidity against the applied thermal stress cannot be formed, and the side wall (42 ) As well as the bottom surface portion (41), the structure is stronger against bending in the tube stacking direction than the conventional product. From these, it can be set as the heat exchanger which has a side plate (4) which can relieve | moderate the thermal stress which generate | occur | produces the slit (45) vicinity while having moderate pressure-resistant rigidity.

  Moreover, in invention of Claim 3, in the heat exchanger of Claim 1 or Claim 2, the slit (45) provided in a bending curved-surface part (44) and opposing diagonally in the width direction is made into bottom part. It is characterized in that a transverse slit (46) is formed continuously by the slit provided in (41).

  Although the rigidity of each of the plurality of slits (45) provided in the bending curved surface portion (44) can be adjusted by adjusting the length in the longitudinal direction, according to the invention of claim 3, Further, in order to adjust the rigidity in a direction to lower the rigidity, the slits (45) of claim 2 are made continuous with the slits provided on the bottom surface portion (41) to form a transverse slit (46) inclined obliquely. By appropriately adopting such a slit shape, it can be adjusted to an appropriate rigidity.

  The invention according to claim 4 is characterized in that, in the heat exchanger according to claim 3, a plurality of transverse slits (46) are arranged in parallel in the same direction. According to the fourth aspect of the present invention, it is possible to adjust the rigidity to an appropriate level depending on the number of lines arranged side by side. In addition, since the slits (45) provided in the bent curved surface portions (44) at both ends of the transverse slit (46) are arranged in a zigzag shape in the longitudinal direction, the slits (45) are connected to each other to connect the transverse slit (46). Even if a plurality of them are arranged, the ends of the transverse slits (46) do not overlap in the width direction.

  Moreover, in invention of Claim 5, in the heat exchanger of Claim 1, several slits (47, 48, 49, 50, 51) were provided only in the bottom face part (41), It is characterized by the above-mentioned. . According to the fifth aspect of the present invention, the slit (47, 48, 49, 50) is formed only in the bottom surface portion (41) while leaving the side wall portion (42) and the curved surface portion (44) for maintaining rigidity as they are. , 51) are provided to alleviate the applied thermal stress. By providing a plurality of slits (47, 48, 49, 50, 51), it is possible to disperse stress and to provide a side plate (4) that is more resistant to bending in the tube stacking direction than conventional products. it can.

  Moreover, in invention of Claim 6, in the heat exchanger of Claim 5, a slit (47, 48, 49, 50, 51) is made into the bottom face part near the bending curved-surface part (44) of the width direction both sides. (41) is characterized in that it is provided in a longitudinal direction in the longitudinal direction. According to the sixth aspect of the present invention, since there is no slit in the central portion in the width direction where stress is most applied at the time of pressure resistance, the side plate (4) having excellent pressure resistance can be obtained. Moreover, it can adjust to moderate rigidity by adjusting the length of the vertically long slit (45) in the longitudinal direction.

  The invention according to claim 7 is characterized in that, in the heat exchanger according to claim 5 or 6, the slits (47, 50, 51) are arranged in a staggered manner in the longitudinal direction. According to the invention described in claim 7, as in the invention described in claim 2, a plurality of slits (47, 50, 51) arranged in a staggered manner in the longitudinal direction so as not to overlap in the width direction. As a result, a portion with extremely low rigidity cannot be formed with respect to the applied thermal stress, and it can be dispersed not only in the side wall portion (42) but also in the bottom surface portion (41). The structure is strong against bending. Thereby, it can be set as the heat exchanger which has a side plate (4) which can relieve | moderate the thermal stress which generate | occur | produces the slit (45) vicinity while having moderate pressure-resistant rigidity.

  The invention described in claim 8 is characterized in that, in the heat exchanger according to claim 5 or 6, the slit (48) is arranged symmetrically with respect to the center line in the width direction. According to the eighth aspect of the present invention, since the highly rigid side wall portion (42) and the curved surface portion (44) are left, the slits (48) can be arranged in the width direction.

  The invention according to claim 9 is characterized in that, in the heat exchanger according to claim 5 or 6, the slit (49) is arranged only on one side with respect to the center line in the width direction. . According to the ninth aspect of the invention, when it is desired to slightly reduce the rigidity, the slits (49) may be provided in only one row on one side.

  In the invention described in claim 10, in the heat exchanger according to any one of claims 1 to 11, a plurality of slits (50, 51) having different lengths are arranged in the width direction. It is characterized by. According to the tenth aspect of the present invention, when it is necessary to further reduce the rigidity, the adjustment can be performed by arranging a plurality of slits (50, 51) having different lengths in the width direction.

  Further, the invention according to claim 11 is characterized in that in the heat exchanger according to claim 10, the slit (51) on the center side in the width direction is shortened in the longitudinal direction. According to the eleventh aspect of the invention, by reducing the rigidity in the vicinity of the corner portion rather than the rigidity in the central portion in the width direction, it is possible to support the central portion in the width direction where high stress is generated at the time of pressure resistance.

  Moreover, in invention of Claim 12, in the heat exchanger of any one of Claims 1 thru | or 11, a slit (45, 46, 47, 48, 49, 50, 51) is made into a longitudinal direction. It is characterized by being arranged line-symmetrically with respect to the direction center. Moreover, in invention of Claim 13, in the heat exchanger of any one of Claim 1 thru | or 11, a slit (45, 46, 47, 48, 49, 50, 51) is made into a longitudinal direction. It is assumed that they are arranged symmetrically with respect to the direction center.

  According to the invention described in claim 12 or claim 13, by arranging the slits (45, 46, 47, 48, 49, 50, 51) in line symmetry or point symmetry with respect to the longitudinal center, Since it is possible to prevent the entire side plate (4) from being deformed in one direction due to stress or the like during pressing, manufacturing can be facilitated.

  In the invention according to claim 14, in the heat exchanger according to any one of claims 1 to 13, the plurality of slits (45, 46, 47, 48, 49, 50, 51) are side surfaces. Two slit groups located apart in the longitudinal direction of the plate (4) are formed. In addition, the code | symbol in the parenthesis as described in a claim and said each means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. In this embodiment, the heat exchanger according to the present invention is applied to a radiator for a vehicle water-cooled engine. FIG. 1 is a front view of the radiator 1 according to the present embodiment as viewed from the flow direction of cooling air (heat exchange fluid), and FIG. 2 is an overall perspective view of the side plate 4 according to the first embodiment of the present invention. FIG. 3 is an enlarged perspective view of a portion surrounded by a broken line in FIG. 2, and FIG. 4 is a sectional view taken along line IV-IV in FIG.

  As shown in FIG. 1, the heat exchanger of the present embodiment is a radiator 1 for cooling cooling water for cooling an engine, and includes an inlet side and outlet side tank part 2, a core part 3, and a heat exchanger. The side plate 4 arranged on the side surface of the main body is the main configuration. The side plate 4 is a reinforcing plate that reinforces the side surface of the heat exchanger. The tank portion 2 is a resin molded product, and each bottom portion is caulked and fixed to tube plates 23 disposed on both upper and lower sides of the core portion 3. In addition, the tank unit 2 is provided with supply and discharge ports 21 and 22 which are inlets and outlets of cooling water, respectively.

  The core portion 3 is composed of a plurality of tubes 31 whose both end portions are fitted and fixed to the tube plate 23, and wavy fins 32 disposed between the tubes 31. The tube 31 in FIG. 1 has cooling water flowing therein and in a direction (in this embodiment, the vertical direction in FIG. 1) intersecting with the flow direction of the cooling air (in FIG. 1, the vertical direction on the paper surface). It is a tube that extends.

  The tube 31 according to this embodiment is formed by bending a belt-like plate material into a cylindrical shape and joining both edges to form a flat cylindrical shape. The elliptical direction of the cross section coincides with the flow direction of the cooling air. I am letting. Further, between the flat outer surfaces of the tubes 31, the fluid flowing in the tubes 31, that is, the fins 32 that promote heat exchange between the cooling water and the cooling air are joined by a joining method such as brazing. The tube 31 and the fins 32 constitute the core portion 3.

  Note that the fin 32 according to the present embodiment is a corrugated fin having a large number of bent portions and formed in a corrugated shape, so that cooling air can meander through a portion connecting adjacent bent portions. An louver (not shown) in the shape of an armor window that suppresses the growth of the temperature boundary layer by disturbing the air flow is formed.

  In addition, a pair of side plates 4 that extend in parallel with the longitudinal direction of the tube 31 and reinforce the core portion 3 are provided at both left and right ends of the substantially rectangular core portion 3 in the tube and fin lamination direction. As shown in FIG. 2, the side plate 4 includes a bottom surface portion 41 formed in the longitudinal direction and side wall portions 42 formed by folding both sides of the bottom surface portion 41 in the width direction. Thus, it is formed in a substantially U shape, and the bending rigidity (second moment of section) in the thickness direction is enhanced.

  The side plate 4 extends along the longitudinal direction of the tube 31. The side plate 4 has a bottom surface portion 41 that extends along the longitudinal direction and extends substantially parallel to the tube 31. Joint portions for joining to the header are provided at both ends in the longitudinal direction of the bottom surface portion 41. In this embodiment, the header is provided by the tube plate 23 and the tank 2.

  The side plate 4 has a side wall portion 42 that rises substantially perpendicularly from one side of the bottom surface portion 41 in the longitudinal direction. In this embodiment, side wall portions 42 are provided on both sides of the bottom surface portion 41. The bottom surface portion 41 and the side wall portions 42 are formed by bending a series of plate materials. A curved surface portion 44 is formed between the bottom surface portion 41 and the side wall portions 42 so as to draw a curved surface and bend.

  In the present embodiment, both end portions in the longitudinal direction of the side plate 4 are joined in a state of being inserted into the tube plate 23 shown in FIG. 1, so that only the both end portions in the longitudinal direction of the side plate 4 have substantially the same cross-sectional shape. It is not a U-shape, and is a simple plate-like insertion portion 43. The tube plate 23 in FIG. 1 is disposed at both ends in the longitudinal direction of the tube 31 and communicates with the plurality of tubes 31, while the longitudinal ends of the plurality of tubes 31 and the side plates 4 are inserted. These are joined by a joining method such as brazing.

  Therefore, the plurality of tubes 31 and the side plate 4 are joined together to the tube plate 23 that provides the header. Here, “brazing” is a technique for joining so as not to melt the base material using brazing material or solder, as described in “connection / joining technology” (Tokyo Denki University Press). To tell. When joining using a filler material having a melting point of 450 ° C. or higher is called brazing, the filler material at that time is called brazing material, and when joining using a filler material having a melting point of 450 ° C. or less is soldered The filler material at that time is called solder.

  In addition, all the structural members except the tank part 2 of these radiators 1 are made of aluminum, and a brazing sheet (cladding layer) coated with a brazing material is provided on at least one side of the abutting parts with which each member abuts. Is provided. The radiator 1 configured in this manner is brazed in a heat treatment furnace (not shown) in a state where the core portion 3, the side plate 4, and the tube plate 23 are temporarily assembled, and each portion is joined to the tube plate 23. The tank portion 2 is assembled and caulked and joined. The tank portion 2 may be a heat exchanger formed of aluminum as with the core portion 3.

  Next, the slit 45 of the side plate 4 will be described. In the present embodiment, as shown in FIGS. 2 to 4, a plurality of slits (holes) 45 for thermal stress relaxation are provided in the curved curved surface portion 44 between the bottom surface portion 41 and the side wall portion 42. At the same time, the slits 45 are arranged in a staggered manner in the longitudinal direction so that the positions do not overlap with each other in the width direction of the side plate 4. The slit 45 is provided in a predetermined range at least from both ends in the longitudinal direction of the side plate 4. In the present embodiment, the slit 45 is provided only within a range within approximately 12% of the longitudinal dimension of the side plate 4. .

  The slit 45 according to the present embodiment is formed by punching the side plate 4 by press working or the like. More specifically, in the unfolded state before the side plate 4 is formed into a U-shape, the slits 45 are formed simultaneously with the punching of the outer shape by pressing or the like, and then both sides in the width direction by other processes such as pressing. Is folded into a U-shape to form a side wall portion 42, and the cross-sectional shape is press-molded into a substantially U-shape.

  The slit 45 may be a hole that is longer in the longitudinal direction than the shape shown in FIGS. 2 and 3, or may have a shape that hangs on the bottom surface portion 41 or the side wall portion 42 on both sides of the curved surface portion 44. The slit 45 may be provided only on one side with respect to the center line in the width direction.

  In this embodiment, a plurality of slits 45 are distributed in the curved surface portion 44 of the side plate 4 with respect to the longitudinal direction of the side plate 4. The plurality of slits 45 are arranged so that the two slits 45 are not aligned in the width direction of the side plate 4. The plurality of slits 45 are arranged away from each other so that the openings of the two slits 45 do not overlap in the width direction of the side plate 4.

  The plurality of slits 45 are regularly arranged within a certain range at both ends in the longitudinal direction of the side plate 4. The plurality of slits 45 form two slit groups that are located apart in the longitudinal direction of the side plate 4. The two slit groups are located at both ends of the side plate 4. The plurality of slits 45 are arranged at equal intervals in the longitudinal direction of the side plate 4 and are alternately arranged at both ends in the width direction of the side plate 4.

  The plurality of slits 45 are arranged such that the interval between the two adjacent slits 45 on the curved surface portion 44 is substantially equal to the interval between the two adjacent slits 45 across the bottom surface portion 41. Each slit 45 is short with respect to the longitudinal direction of the side plate 4 and opens from the bottom surface portion 41 to the side wall portion 42 over almost the entire width of the curved surface portion 44.

  Next, features and effects of this embodiment will be described. First, a plurality of slits 45 are arranged in the side plate 4 so as to be distributed in the longitudinal direction of the side plate 4. According to this, since the plurality of slits 45 are distributed, stress concentration in the bending direction can be reduced.

  In addition, a plurality of slits 45 are provided in the bent curved surface portion 44 between the bottom surface portion 41 and the side wall portion 42 of the side plate 4, and the slits 45 are arranged in a staggered manner in the longitudinal direction so that the positions do not overlap in the width direction. Yes. According to this, while leaving the side wall part 42 for maintaining rigidity as it is, a plurality of slits 45 are provided on the curved surface part 44 connecting the side wall part 42 and the bottom surface part 41 so as to relieve the thermal stress applied. is there. In this way, by providing a plurality of slits 45, stress distribution becomes possible, and a side plate that is more resistant to bending in the tube stacking direction than conventional products can be provided.

  Furthermore, by arranging the plurality of slits 45 in a staggered manner in the longitudinal direction so that the positions do not overlap in the width direction, a portion having extremely low rigidity cannot be formed with respect to the applied thermal stress. Since it can disperse | distribute also to the bottom face part 41, it becomes a structure strong with respect to the bending of a tube lamination direction compared with a conventional product. From these, it can be set as the heat exchanger which has the side plate 4 which can relieve | moderate the thermal stress which generate | occur | produces the slit 45 vicinity, having moderate pressure-resistant rigidity.

(Second Embodiment)
FIG. 5 is a partially enlarged perspective view of the side plate 4 in the second embodiment of the present invention, and FIG. 6 is a sectional view taken along line VI-VI in FIG. Features that are different from the first embodiment will be described. In this embodiment, as shown in FIGS. 5 and 6, slits are provided obliquely on the bottom surface portion 41, and both end portions thereof are transverse slits 46 including the bent curved surface portions 44 on both sides in the width direction.

  Rigidity can be adjusted by adjusting the length of each of the plurality of slits 45 provided in the bending curved surface portion 44 in the first embodiment in the longitudinal direction. In the first embodiment, the slit of the bottom surface portion 41 is added between the slits 45 that are diagonally opposed in the width direction, so that the whole is smoothly continuous to form one transverse slit 46 that is inclined obliquely. By appropriately adopting such a slit shape, it can be adjusted to an appropriate rigidity.

  A plurality of the transverse slits 46 are arranged in the same direction. According to this, it can adjust to moderate rigidity also by the number arranged in parallel. The slit 45 portions (broken lines in FIG. 5) provided in the curved curved surface portions 44 at both ends of the transverse slit 46 are arranged in a staggered manner in the longitudinal direction although the interval is different from that of the first embodiment. Even if a plurality of transverse slits 46 are arranged such that the slits 45 are connected to each other, the ends of the transverse slits 46 do not overlap in the width direction (one-dot chain line in FIG. 5). The transverse slit 46 is not limited to a straight line, and may be formed by bending, for example, a C shape or an S shape.

(Third embodiment)
FIG. 7 is a partially enlarged perspective view of the side plate 4 in the third embodiment of the present invention. A different characteristic part from each embodiment mentioned above is demonstrated. In the present embodiment, a plurality of slits 47 are provided only on the bottom surface portion 41. According to this, while leaving the side wall part 42 and the curved surface part 44 for maintaining rigidity as they are, a plurality of slits 47 are provided only on the bottom surface part 41 to relieve the thermal stress applied. By providing a plurality of slits 47, stress dispersion becomes possible, and a side plate that is more resistant to bending in the tube stacking direction than conventional products can be provided.

  Further, the slits 47 are provided in the bottom surface portion 41 in the vicinity of the bent curved surface portions 44 on both sides in the width direction as vertically long in the longitudinal direction. The vertically long slit 47 of this embodiment can also be provided at the position of the slit 45 of the first embodiment. The slit 47 is provided only in the bottom surface portion 41. The plurality of slits 47 are arranged corresponding to the positions of the slits 45 of the first embodiment. Each slit 47 is formed in an elongated shape. Each slit 47 is long along the longitudinal direction of the side plate 4 and is thin with respect to the width direction of the side plate 4.

  In this embodiment, the plurality of slits 47 are arranged so that the opening ranges of the two slits 47 overlap each other in the width direction of the side plate 4. According to this, since there is no slit in the central portion in the width direction where stress is most applied at the time of pressure resistance, the side plate 4 having excellent pressure resistance can be obtained. Moreover, it can adjust to moderate rigidity by adjusting the length of the longitudinally long slit 47 in a longitudinal direction. The slit 47 is provided only on the bottom surface portion 41, and is not provided on the side wall portion 42 and the curved surface portion 44 that provide bending rigidity. For this reason, a side plate having high bending rigidity and being relatively flexible with respect to elongation and torsion is provided.

  Further, the slits 47 are arranged in a staggered manner in the longitudinal direction. According to this, similarly to the first embodiment, a plurality of slits 47 are arranged in a staggered manner in the longitudinal direction so that the positions do not overlap in the width direction, so that the portion having extremely low rigidity against the applied thermal stress Therefore, it can be dispersed not only in the side wall portion 42 but also in the bottom surface portion 41, so that the structure is stronger against bending in the tube stacking direction than the conventional product. Thereby, it can be set as the heat exchanger which has a side plate which can relieve | moderate the thermal stress which generate | occur | produces near the slit 47, having moderate pressure-resistant rigidity.

(Fourth embodiment)
FIG. 8 is a partially enlarged perspective view of the side plate 4 in the fourth embodiment of the present invention. A different characteristic part from each embodiment mentioned above is demonstrated. In the present embodiment, the slits 48 are arranged symmetrically with respect to the center line in the width direction. According to this, since the highly rigid side wall part 42 and the curved surface part 44 are left, it is also possible to arrange the slits 48 in the width direction.

(Fifth embodiment)
FIG. 9 is a partially enlarged perspective view of the side plate 4 in the fifth embodiment of the present invention. A different characteristic part from each embodiment mentioned above is demonstrated. In the present embodiment, the slit 49 is disposed only on one side with respect to the center line in the width direction. According to this, when it is desired to slightly reduce the rigidity, the slits 49 may be provided in only one row on one side.

(Sixth embodiment)
FIG. 10 is a partially enlarged perspective view of the side plate 4 in the sixth embodiment of the present invention. A different characteristic part from each embodiment mentioned above is demonstrated. In the present embodiment, a plurality of slits 50 and 51 having different lengths are arranged in the width direction. According to this, when it is necessary to further reduce the rigidity, adjustment is possible by arranging a plurality of slits 50 and 51 having different lengths in the width direction.

  Further, the slit 51 on the center side in the width direction is shortened in the longitudinal direction. In this embodiment, a slit 50 that is long in the longitudinal direction of the side plate 4 and a slit 51 that is shorter than the slit 50 in the longitudinal direction of the side plate 4 are arranged. One slit 50 and one slit 51 are paired, and the slit 50 is disposed close to the boundary between the bottom surface portion 41 and the curved surface portion 44. According to this, by lowering the rigidity in the vicinity of the corner than the rigidity in the center in the width direction, it is possible to support the center in the width direction in which high stress is generated at the time of pressure resistance.

(Seventh embodiment)
11 and 12 are all perspective views of the side plate 4 in the seventh embodiment of the present invention. A different characteristic part from each embodiment mentioned above is demonstrated. This embodiment proposes an arrangement of a plurality of slits. In FIG. 11, the slits 47 shown in the third embodiment are arranged symmetrically with respect to the center in the longitudinal direction on both ends in the longitudinal direction of the side plate 4. In FIG. 12, the slits 47 shown in the third embodiment are arranged symmetrically with respect to the longitudinal center on both ends in the longitudinal direction of the side plate 4.

  Note that the arrangement of the plurality of slits exemplified in this embodiment can also be applied to the slits 45, 46, 47, 48, 49, 50, and 51 shown in the other embodiments described above. According to these, the slits 45, 46, 47, 48, 49, 50, 51 are arranged in line symmetry or point symmetry with respect to the center in the longitudinal direction, so that the entire side plate 4 is 1 due to stress during press working. Since it is possible to prevent deformation in one direction, manufacturing can be facilitated.

(Other embodiments)
The present invention is not limited to the above-described embodiment as long as it meets the gist of the invention described in the claims. For example, in the above-described embodiment, the heat exchanger according to the present invention is applied to the radiator 1, but a so-called multiflow type heat exchanger such as an oil cooler, an intercooler, or a condenser may be used. Moreover, in the above-mentioned embodiment, although it was set as the tube & fin type heat exchanger which has arrange | positioned the fin between tubes, the finless type heat exchanger which does not provide a fin may be sufficient.

  In the above-described embodiment, the header is provided by the header plate and the tank. However, a configuration may be adopted in which a plurality of tubes and side plates are joined to a header pipe made of resin or metal such as aluminum. Furthermore, in the said embodiment, although the tube which bent and joined the board | plate material in the cylinder shape is employ | adopted, an extrusion molded product may be sufficient as a tube.

  Further, in the above-described embodiment, the longitudinal direction of the tube 31 is arranged in the vertical direction, but it may be arranged in the horizontal direction. Further, in the above-described embodiment, the component parts are joined by brazing, but the side plate of the present invention is attached to the heat exchanger that joins and joins the component parts using a fluid thermosetting adhesive. It may be applied.

It is the front view which looked at the radiator 1 which concerns on embodiment of this invention from the distribution direction of the cooling air. It is a whole perspective view of the side plate 4 in 1st Embodiment of this invention. It is an expansion perspective view of the part enclosed with the broken line in FIG. It is IV-IV sectional drawing in FIG. It is a partial expansion perspective view of the side plate 4 in 2nd Embodiment of this invention. It is VI-VI sectional drawing in FIG. It is a partial expansion perspective view of the side plate 4 in 3rd Embodiment of this invention. It is a partial expansion perspective view of the side plate 4 in 4th Embodiment of this invention. It is a partial expansion perspective view of the side plate 4 in 5th Embodiment of this invention. It is a partial expansion perspective view of the side plate 4 in 6th Embodiment of this invention. It is a whole perspective view of the side plate 4 in 7th Embodiment of this invention. It is a whole perspective view of the side plate 4 in 7th Embodiment of this invention. It is a schematic diagram explaining the problem in the side plate of patent document 1. FIG.

Explanation of symbols

2 ... Tank part 3 ... Core part 4 ... Side plate 23 ... Tube plate (tank part)
DESCRIPTION OF SYMBOLS 31 ... Tube 41 ... Bottom part 42 ... Side wall part 44 ... Bending curved surface part 45, 47, 48, 49, 50, 51 ... Slit 46 ... Crossing slit (slit)

Claims (14)

A core portion (3) having a plurality of tubes (31) extending in a direction intersecting the flow direction of the heat exchange fluid;
A side plate (4) disposed at both ends of the core part (3) and extending in parallel with the longitudinal direction of the tube (31) to reinforce the core part (3);
Tank portions (2, 23) connected to the plurality of tubes (31) and connected to both ends in the longitudinal direction of the plurality of tubes (31) and the side plate (4),
The side plate (4) includes a bottom surface portion (41) formed in the longitudinal direction and a side wall portion (42) formed by folding in the width direction of the bottom surface portion (41). In
A heat exchanger characterized in that a plurality of slits (45, 46, 47, 48, 49, 50, 51) are arranged in the side plate (4) in a distributed manner in the longitudinal direction of the side plate (4). .   A plurality of slits (45) are provided in the curved surface portion (44) between the bottom surface portion (41) and the side wall portion (42) of the side plate (4), and the slit (45) is formed in the width direction. The heat exchanger according to claim 1, wherein the heat exchangers are arranged in a staggered manner in the longitudinal direction so as not to overlap with each other.   The slit (45) provided on the curved surface portion (44) and diagonally opposed in the width direction is continued by a slit provided on the bottom surface portion (41) to form a transverse slit (46). The heat exchanger according to claim 1 or 2.   The heat exchanger according to claim 3, wherein a plurality of the transverse slits (46) are arranged in the same direction.   The heat exchanger according to claim 1, wherein a plurality of slits (47, 48, 49, 50, 51) are provided only on the bottom surface portion (41).   The slits (47, 48, 49, 50, 51) are provided in the bottom surface portion (41) in the vicinity of the curved surface portions (44) on both sides in the width direction as vertically long in the longitudinal direction. Item 6. The heat exchanger according to Item 5.   The heat exchanger according to claim 5 or 6, wherein the slits (47, 50, 51) are arranged in a staggered manner in the longitudinal direction.   The heat exchanger according to claim 5 or 6, wherein the slits (48) are arranged symmetrically with respect to the center line in the width direction.   The heat exchanger according to claim 5 or 6, wherein the slit (49) is arranged only on one side with respect to the center line in the width direction.   The heat exchanger according to any one of claims 7 to 9, wherein a plurality of the slits (50, 51) having different lengths are arranged in the width direction.   The heat exchanger according to claim 10, wherein the slit (51) on the center side in the width direction is shortened in the longitudinal direction.   12. The slit according to claim 1, wherein the slits (45, 46, 47, 48, 49, 50, 51) are arranged in line symmetry with respect to the longitudinal center. Heat exchanger.   12. The slit according to claim 1, wherein the slits (45, 46, 47, 48, 49, 50, 51) are arranged point-symmetrically with respect to the longitudinal center. Heat exchanger.   The plurality of slits (45, 46, 47, 48, 49, 50, 51) form two slit groups located apart in the longitudinal direction of the side plate (4). The heat exchanger according to any one of claims 1 to 13.

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