JP2006145165A - Composite type heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite type heat exchanger preventing accumulation of internal stress in a core part. <P>SOLUTION: Since a first tank part 5b and a second tank part 9b sending out fluids with different temperatures are separated, each of them can be moved in a thermal expansion direction (a flowing direction of the fluid). Accordingly, even when there is heat distortion due to a difference of thermal expansion between a first core part 4 and a second core part 8, the heat distortion can be released, and accumulation of internal stress due to the heat distortion is prevented. Since corresponding ends of the separated first tank part 5b and the second tank part 9b are coupled by a coupling means 11 capable of relatively moving only in the flowing direction of the fluid, a coupled state is maintained in a direction other than a direction mainly causing the heat distortion, and influences to the first core part 4 and the second core part 8 due to irregular changing of positions of the first tank part 5b and the second tank part 9b can be avoided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a composite heat exchanger for flowing two types of fluids having different temperatures.

  In order to effectively use the space in the engine room, there is known a composite heat exchanger in which two types of heat exchanger bodies that circulate fluids having different temperatures are integrated. For example, a combined heat exchanger in which a radiator and an oil cooler are integrated.

In such a composite heat exchanger, a core part through which air passes and tank parts provided at both ends thereof are also integrated. The tank part is partitioned by a partition plate having a U-shaped cross section at an intermediate position in each region in order to separate fluids having different temperatures in a heat insulating state. The core part is composed of a tube and fins provided therebetween, and is distinguished depending on which side of the tank part is connected to both ends of the tube (see, for example, Patent Document 1).
Japanese Patent No. 3049386

  However, in such a conventional technique, in order to divide the tank part in a thermally insulated state, the middle part of the tank part is divided by a partition plate having a U-shaped cross section, but the divided tank part itself is integrated. Even if thermal distortion occurs due to the difference in thermal expansion between the regions where fluids having different temperatures flow in the core, the structure cannot be moved correspondingly, and internal stress is generated in the core. Accumulate.

  Therefore, there exists a possibility that joining parts, such as a tube and a fin which comprise a core part, may peel with the internal stress. Therefore, it is necessary to make the joints stronger at the time of manufacturing, and it becomes difficult to manufacture the core portion.

  The present invention has been made paying attention to such a conventional technique, and provides a composite heat exchanger in which internal stress is not accumulated in a core portion.

  The invention according to claim 1 is different from the first fluid in the first heat exchanger main body in which the first tank portions are respectively provided at both ends of the first core portion that allows the first fluid for heat exchange to pass in one direction. A composite type having a structure in which a second heat exchanger main body provided with a second tank part at each end of a second core part through which a second fluid having a temperature passes in one direction is integrated in a horizontal direction or a vertical direction. A heat exchanger, wherein the first tank part and the second tank part are separated on at least one end side of the first core part and the second core part, and the separated first tank part and second tank are separated The end portions corresponding to the first and second portions are coupled by a coupling means that can be relatively moved only in the fluid flow direction.

  The invention according to claim 2 is characterized in that the coupling means is provided with a regulating structure for regulating the relative movement amount.

  The invention described in claim 3 is characterized in that an elastic member is interposed between corresponding end portions in the separation portion of the first tank portion and the second tank portion.

  The invention according to claim 4 is characterized in that the core portion is composed of a tube along a fluid flow direction and fins provided between the tubes.

  The invention according to claim 5 is characterized in that the tube corresponding to the separation portion of the first tank portion and the second tank portion is a dummy that does not allow fluid to pass therethrough.

  According to the first aspect of the present invention, the first tank portion and the second tank portion that flow fluids having different temperatures are separated at least at one end side at both ends of the core portion. Each of the two tank portions can move in the thermal expansion direction (fluid flow direction). Therefore, even if thermal strain occurs due to a difference in thermal expansion between the integrated first core portion and second core portion, the thermal strain is released by the movement of the first tank portion and the second tank portion. The internal stress due to thermal strain is not accumulated. Moreover, since the corresponding end portions of the separated first tank portion and second tank portion are coupled by coupling means that can be relatively moved only in the fluid flow direction, the thermal strain is not the main direction other than that. The coupling state in the directionality is maintained, and it is possible to avoid the influence on the first core portion and the second core portion due to the irregular change of the positions of the first tank portion and the second tank portion.

  According to the second aspect of the present invention, since the restricting structure for restricting the relative movement amount is provided in the coupling means, even if an external force is applied to the first tank portion and the second tank portion, they are subject to thermal distortion. There is no risk of disengagement mainly in the direction in which it occurs, and the original coupling state by the coupling means is maintained.

  According to invention of Claim 3, since the elastic member was interposed between the corresponding end parts in the separation part of the 1st tank part and the 2nd tank part, in the direction where the 1st tank part and the 2nd tank part approach mutually. Can be controlled. Therefore, it is particularly suitable for a horizontal type combined heat exchanger in which the first tank part and the second tank part are arranged vertically, and the movement of the first tank part and the second tank part in the approaching direction by gravity is ensured. Can be prevented.

  According to invention of Claim 4, since the 1st core part and the 2nd core part are comprised from the tube along the flow direction of a fluid, and the fin provided between tubes, a 1st tank part and The first core portion and the second core portion can be partitioned for each tube connected to each of the second tank portions.

  In the invention according to claim 5, since the tube corresponding to the separation part of the first tank part and the second tank part is made a dummy, the heat insulation between the first core part and the second core part is more reliably maintained.

  For the purpose of providing a composite heat exchanger in which internal stress is not accumulated in the core portion, a first tank portion is provided at each end of the first core portion that allows the first fluid for heat exchange to pass in one direction. A heat exchanger main body and a second heat exchanger main body provided with second tank portions at both ends of a second core portion that allows a second fluid having a temperature different from that of the first fluid to pass in one direction; A composite heat exchanger having a structure in which they are arranged side by side in the vertical direction, wherein the first tank part and the second tank part are separated at least at one end side of the first core part and the second core part. In addition, the corresponding end portions of the separated first tank portion and second tank portion are coupled by a coupling means that is relatively movable only in the fluid flow direction. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 are views showing a first embodiment of the present invention. The composite heat exchanger 1 according to this embodiment has a structure in which a first heat exchanger body 2 that is a radiator and a second heat exchanger body 3 that is an oil cooler are arranged side by side in the vehicle width direction and integrated. I am doing.

  The first heat exchanger body 2 has a structure in which first tank portions 5 a and 5 b are provided above and below the first core portion 4. The first core portion 4 includes a plurality of flat tubes 6 whose upper and lower ends are connected to the first tank portions 5 a and 5 b, and corrugated fins 7 provided between the tubes 6. . The second heat exchanger body 3 also has a similar structure with only a small width, and has a structure in which second tank portions 9 a and 9 b are provided above and below the second core portion 8. The upper and lower first tank parts 5a and 5b and the second tank parts 9a and 9b are made of resin, respectively.

  The upper first tank portion 5a and the second tank portion 9a are integrated with each other, and are only partitioned through an internal partition wall 10. The lower first tank portion 5b and the second tank portion 9b are separated via a gap. Although the 1st core part 4 and the 2nd core part 8 are integrated in appearance, the area | region is divided | segmented by the 1st tank parts 5a and 5b and the 2nd tank parts 9a and 9b which connect those both ends. Corresponding end portions of the lower first tank portions 5a and 5b and the second tank portions 9a and 9b are coupled to each other by a coupling means 11 described later.

  An introduction pipe 12a for introducing engine cooling water (temperature 100 to 110 ° C.) and an introduction pipe for introducing oil (temperature 130 to 140 ° C.) are respectively introduced into the upper first tank portion 5a and second tank portion 9a. 13a is formed. The lower first tank portion 5b and the second tank portion 9b are respectively formed with a discharge pipe 12b for discharging engine cooling water and a discharge pipe 13b for discharging oil.

  Downward projections 14 are formed on the lower first tank portion 5 b and the second tank portion 9 b in the composite heat exchanger 1. A radiator core lower 15 is formed in front of the engine room, and a support hole 16 is formed there. The lower protrusion 14 of the composite heat exchanger 1 is inserted and supported in the support hole 16 via the buffer ring body 17.

  A radio core upper 18 whose both ends are fixed to a hood ridge (not shown) is attached to the upper part of the composite heat exchanger 1 from above. Spring plates 19 are provided on the lower surface of the radio core upper 18 on the left and right, and the upper first tank portion 5a and the second tank portion 9a of the composite heat exchanger 1 are pressed downward by the spring plates 19. Further, the upper mounting structure is not limited to this, and it may be mounted on a pin similar to the lower portion by a rubber mount.

  Next, the coupling means 11 that couples the corresponding end portions of the separated lower first tank portion 5b and second tank portion 9b will be described. An engagement piece 20 having a T-shaped cross section is integrally molded with the end of the first tank portion 5b, and a receiving piece 21 for receiving the engagement piece 20 is integrally formed with the end of the second tank portion 9b. It is resin molded. A cavity 22 having a shape corresponding to the engagement piece 20 is formed in the receiving piece 21 so as to penetrate vertically. Therefore, the engaging piece 20 and the receiving piece 21 can be relatively moved in the vertical direction, but cannot be relatively moved in other directions. The coupling means 11 includes the engaging piece 20 and the receiving piece 21.

  A long hole 23 extending in the vertical direction is formed on one side surface of the receiving piece 21. A pin 24 having a head is inserted into the long hole 23, and a tip thereof is fastened to a hole 25 formed in the engaging piece 20 inside the receiving piece 21. A restriction structure 26 is configured by the long hole 23 and the pin 24, and the amount of relative movement between the engagement piece 20 and the receiving piece 21 in the vertical direction is restricted. Therefore, no matter how large the relative movement amount is, there is no possibility that the engaging piece 20 and the receiving piece 21 will come off.

  Further, an elastic member (rubber rubber) 27 is provided between the separated lower first tank portion 5b and second tank portion 9b. Accordingly, the movement of the first tank portion 5b and the second tank portion 9b in the approaching direction is restricted.

  According to this embodiment, since the first tank portion 5b and the second tank portion 9b that flow fluids having different temperatures are separated below the first core portion 4 and the second core portion 8, Each of the first tank portion 5b and the second tank portion 9b is movable in the thermal expansion direction (vertical direction) of the first core portion 4 and the second core portion 8. That is, since the first core portion 4 and the second core portion 8 cause fluid such as engine cooling water and oil to flow in the vertical direction, the tube 6 continuous in the vertical direction exists, and thermal expansion mainly occurs in the vertical direction. This thermal expansion in the vertical direction becomes a problem. Since there are many gaps due to the fins 7 in the left-right direction, thermal expansion is less than in the up-down direction, and there is less problem than in the up-down direction.

Thus, even if thermal strain due to the difference in thermal expansion occurs between the integrated first core portion 4 and second core portion 8 in the vertical direction, the thermal strain is reduced to the first tank on the lower side. The part 5b and the second tank part 9b can be released by moving respectively. Therefore, internal stress due to thermal strain is not accumulated in the first core part 4 and the second core part 8, and there is no possibility that the first core part 4 and the second core part 8 are peeled off or cracked. In addition, since the first tank portion 5b and the second tank portion 9b on the lower side are completely separated, the insulation between them is also perfect. Also, the separated first tank portion 5b and second tank portion Since the corresponding ends of the portion 9b are coupled by the coupling means 11 by the engaging piece 20 and the receiving piece 21 that can be relatively moved only in the vertical direction, the coupled state in the direction other than the vertical direction is maintained, The influence on the 1st core part 4 and the 2nd core part 8 by the position of the 1st tank part 5b and the 2nd tank part 9b separating or shifting back and forth can be avoided.

  Furthermore, even though the lower first tank portion 5b and the second tank portion 9b are relatively movable in the vertical direction, the amount of movement in the vertical direction is within a certain range by the long hole 23 and the pin 24. Therefore, there is no possibility that the engaging piece 20 and the receiving piece 21 will be deformed or deformed.

  Since the elastic member 27 is interposed between the corresponding end portions in the separation portion of the first tank portion 5b and the second tank portion 9b, even if an external force is applied in a direction in which the first tank portion 5b and the second tank portion 9b are brought closer to each other. The movement in the approaching direction can be restricted, and the influence on the first core part 4 and the second core part 8 can be avoided.

  FIG. 4 is a diagram showing a second embodiment of the present invention. In the composite heat exchanger 28 according to this embodiment, the upper first tank portion 29a and the second tank portion 30a are also separated and provided with the same coupling means 11 therebelow. The coupling means 11 is also provided with a regulating structure 26. By separating the upper first tank part 29a and the second tank part 30a in this way, the heat insulation between the first tank part 29a and the second tank part 30a is increased, and the first core part 4 and the second tank part 30a are also increased. Release of internal stress between the core portions 8 is also promoted. Other configurations and operational effects are the same as those in the previous embodiment, and common portions are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 5 is a diagram showing a third embodiment of the present invention. In the composite heat exchanger 31 according to this embodiment, a dummy tube 32 that does not flow any fluid is provided between the first core portion 4 and the second core portion 8. By providing such a dummy tube 32, the heat insulation between the first core portion 4 and the second core portion 8 is increased. An elastic member 44 is provided between the dummy tube 32 and the first tank portions 29a and 5b and the second tank portions 30a and 9b. Other configurations and operational effects are the same as those in the previous embodiment, and common portions are denoted by the same reference numerals, and redundant description is omitted.

  6 and 7 are views showing a fourth embodiment of the present invention. The composite heat exchanger 33 according to this embodiment is a horizontal type in which a first heat exchanger body 34 and a second heat exchanger body 35 are provided side by side. Accordingly, the first tank portions 36a and 36b and the second tank portions 37a and 37b are arranged vertically, and the tubes 40 and the fins 41 of the first core portion 38 and the second core portion 39 are arranged horizontally. The protrusions 42 are formed at both ends of the first tank portions 36a and 36b and the second tank portions 37a and 37b, and are supported by the vehicle body by the protrusions 42. The support to the vehicle body is elastically supported with play to such an extent that it can move somewhat in the left-right direction.

  Of the left and right first tank parts 36a and 36b and the second tank parts 37a and 37b, the first tank part 36b and the second tank part 37b on one side are separated, and in the meantime, Similar coupling means 11 and restricting structure 26 are provided.

  An elastic member (rubber rubber) 43 is provided between the separated first tank portion 36b and second tank portion 37b.

  Even in such a horizontal type composite heat exchanger 33, the first tank part 36b and the second tank part 37b are respectively provided with the first core part, as in the vertical type as in the previous embodiment. 38 and the second core portion 39 can move in the thermal expansion direction (left-right direction). Therefore, even if thermal strain due to a difference in thermal expansion occurs between the first core portion 38 and the second core portion 39, the thermal strain can be released.

  Further, since the elastic member 43 is provided between the separated first tank portion 36b and second tank portion 37b, the approach of the first tank portion 36b and the second tank portion 37b due to gravity is restricted, and the first The influence on the core part 38 and the second core part 39 can be avoided. Other configurations and operational effects are the same as those of the vertical type, and redundant description is omitted.

  In the above embodiment, the combination of the radiator and the oil cooler is taken as an example of the composite heat exchanger 1, 28, 31, 33, but if it is a composite heat exchanger that flows two types of fluids having different temperatures, Other types of combinations may be used.

The front view which shows the composite-type heat exchanger which concerns on 1st Example of this invention. The enlarged view which shows the coupling | bonding means which concerns on FIG. The disassembled perspective view which shows the coupling means which concerns on FIG. The front view which shows the principal part of the composite heat exchanger which concerns on 2nd Example of this invention. The front view which shows the principal part of the composite heat exchanger which concerns on 3rd Example of this invention. The front view which shows the composite heat exchanger which concerns on 4th Example of this invention. The disassembled perspective view which shows the coupling means based on FIG.

Explanation of symbols

1, 28, 31, 33 Composite heat exchanger 2, 34 First heat exchanger body (radiator)
3, 35 2nd heat exchanger body (oil cooler)
4, 38 1st core part 5a, 5b, 29a, 36a, 36b 1st tank part 6, 40 Tube 7, 41 Fin 8, 39 1st core part 9a, 9b, 30a, 37a, 37b 2nd tank part 11 coupling | bonding Means 26 Regulating structure 32 Tube (dummy)

Claims (5)

A first heat exchanger body (2) provided with first tank portions (5a, 5b) at both ends of a first core portion (4) through which a first fluid for heat exchange passes in one direction; A second heat exchanger body (3) provided with second tank portions (9a, 9b) at both ends of a second core portion (8) for allowing a second fluid having a temperature different from that in one direction to pass through, It is a composite heat exchanger having a structure in which it is integrated in the direction or longitudinal direction,
The first tank part (5a, 5b) and the second tank part (9a, 9b) are separated from each other at least at one end side of the first core part (4) and the second core part (8). Further, the corresponding end portions of the first tank portion (5a, 5b) and the second tank portion (9a, 9b) are connected by a connecting means (11) that can be relatively moved only in the fluid flow direction. Combined heat exchanger. The composite heat exchanger according to claim 1,
A combined heat exchanger, wherein the coupling means (11) is provided with a regulating structure (26) for regulating the relative movement amount. The composite heat exchanger according to claim 1 or 2,
A composite heat exchanger characterized in that an elastic member (27) is interposed between corresponding end portions in the separated portions of the first tank portion (5a, 5b) and the second tank portion (9a, 9b). The composite heat exchanger according to any one of claims 1 to 3,
The first core portion (4) and the second core portion (8) are configured by a tube (6) along the fluid flow direction and a fin (7) provided between the tubes (6). A combined heat exchanger. The composite heat exchanger according to claim 4, wherein
A tube (32) corresponding to a separation part of the first tank part (5a, 29a) and the second tank part (5b, 29b) is a dummy that does not allow the first fluid and the second fluid to pass through. Mold heat exchanger.

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