WO1999028693A1 - Twin unitary type heat exchanger and method of manufacturing same - Google Patents

Abstract

A twin unitary type heat exchanger, in which an assembling quality is favorable without common use of fins, and fins having configurations optimum for respective heat exchangers as required are integrally brazed without making fin pitches, heights of tubes andthe like identical for the respective heat exchangers. A first heat exchanger and a second heat exchanger, which are different in use from each other, are arranged back and forth in a direction of air flow. The first heat exchanger and the second heat exchanger are formed by jointing by brazing a side plate provided on one of the heat exchangers to a tank provided on the other of the heat exchangers.

Description

 TECHNICAL FIELD The present invention relates to a side-by-side integrated heat exchanger and its manufacturing method.

 The present invention relates to a side-by-side integrated heat exchanger in which a plurality of heat exchangers are arranged one behind the other in the airflow direction, and adjacent heat exchangers are integrally connected so that heat exchange portions thereof face each other. About the vessel. Background art

 In recent years, there has been a demand for integrating multiple heat exchangers with different applications (for example, condensers and Lagers) due to the limitations of the onboard space. As a configuration in which a plurality of heat exchangers are integrated, Japanese Patent Laid-Open No. 1-247990 can be cited. In FIG. 17 showing the same configuration as that of the conventional example, two tubes 41 and 55 are arranged side by side, and a number of integral fins 43 are provided between the tubes 41 and 55, and The core portions 45, 57 of the first and second heat exchangers facing each other are formed.

In this example, the fin 43 shares the core portions 45, 57 of the first and second heat exchangers, and heat is transferred through the fin 43. In general, in the case of Rajje and a capacitor, the temperature is higher in Lajje and the heat is transferred to the capacitor core side, resulting in a decrease in the heat exchange performance of the capacitor core side . In addition, in the case where a common fin is used, a notch 2 is formed in the widthwise intermediate portion of the fin in FIG. 18 showing the same configuration as that of Japanese Patent Application Laid-Open No. 3-17795. To prevent heat transmission, but the fin workability is deteriorated and the heat transfer inhibiting effect is not good. In addition, the fin-integrated heat exchanger had the drawback that one core had too much capacity and the other had insufficient capacity because the effective frontal areas of both cores were the same. Furthermore, if the fins were integrated, both had to be replaced in the event of a failure in the market.

 In view of this, the present invention provides a side-by-side integrated heat exchanger. However, the common use of fins is stopped and the assemblability is good, and the fin pitch, tube height, etc., are the same for each heat exchanger. This is to provide a heat exchanger that can be brazed with the optimal shape for each required heat exchanger. Disclosure of the invention

In order to achieve the above object, a side-by-side integrated heat exchanger according to the present invention includes a first heat exchanger and a second heat exchanger, which have different uses, are arranged one after the other in the ventilation direction. However, the heat exchange medium flow directions inside the tubes of one heat exchanger and the other heat exchanger differ by about 90 degrees, and they are joined together by brazing. For this reason, the two heat exchangers have separate fins and lose heat conduction, and do not adversely affect each other's performance. An example of the joining method is that the side plate of one heat exchanger is brazed to the tank of the other heat exchanger. In other words, the side plate is a member with relatively high strength, and the tank is also a member with high strength, which can be firmly connected structurally, is the outermost, and has less heat transfer. is there. Further, as a joining means, the tank portions of both heat exchangers may be joined, or the tank of one heat exchanger and the side plate may be joined to the tank of the other heat exchanger. Even in this case, structurally strong bonding can be achieved by bonding members having high strength to each other. As described above, in the above-described invention, the first and second heat exchangers can have separate and optimal structures, and can freely adjust the fin pitch, fin plate thickness, fin height, tube height, and the like. Each heat exchanger is capable of obtaining the optimum required performance.

Not only the end surface of the side plate and the tank, but also the end of the side plate may be bent and the bent portion may be joined to the sunset _(for this reason, the joining range is expanded, and the It can cope with deviations in core dimensions during tightening (assembly), and can cope with differences in core shrinkage when the first and second heat exchangers are brazed together.

 By positioning the bent portion of the side plate so as to abut against the evening member constituting the evening hole, the positioning during assembly and the prevention of misalignment during brazing are improved.

 Since the bent part is formed long, it is possible to change the lamination dimensions of each heat exchanger, and it is now possible to meet the required performance.

 Further, when the bent portion hinders the passage of cooling air, a window can be formed in the bent portion to prevent an increase in ventilation resistance. In addition, a notch is formed in the bent portion, and similarly, an increase in ventilation resistance can be prevented.

 Further, the lengths of the heat exchangers in the vertical direction can be made different, so that the heat exchangers have a degree of freedom in the relay. Naturally, in that case, the length of the tubes of each heat exchanger in the longitudinal direction will be different.

Fins and fins of the first and second heat exchangers consisting of fins and tubes are not in contact with each other. They may be joined, and there is little decrease in performance.

 A side-by-side integrated heat exchanger consists of separately assembling the first heat exchanger and the second heat exchanger, which have different uses, and then assembling one heat exchanger and the other heat exchanger. The assembly is performed so that the flow direction of the heat exchange medium flowing inside the tube differs by approximately 90 degrees, and brazing is performed in an integrated furnace to combine them together. Therefore, it can contribute to cost reduction. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows a first embodiment of the present invention, and is a front view of a side-by-side integrated heat exchanger, FIG. 2 is a plan view of the same, and FIG. FIG. 4 is a front view of a side-by-side integrated heat exchanger, and FIG. 5 is a plan view of the same, showing a second embodiment of the present invention. FIG. 6 is an enlarged perspective view of an essential part of the above embodiment. FIG. 7 is an enlarged perspective view of an essential part showing a third embodiment of the present invention. FIG. 8 is a fourth embodiment of the present invention. FIG. 9 is an enlarged perspective view of a main part showing an embodiment, FIG. 9 is an enlarged perspective view of a main part showing a fifth embodiment of the present invention, and FIG. 10 is a sixth embodiment of the present invention. FIG. 11 is a side view of a side-by-side integrated heat exchanger showing an embodiment; FIG. 11 is a side view of a side-by-side integrated heat exchanger showing a seventh embodiment of the present invention; Figure 12 shows this FIG. 13 is a side view of a side-by-side integrated heat exchanger showing an eighth embodiment, FIG. 13 is an enlarged perspective view of a main part of the heat exchanger, and FIG. FIG. 15 is a side view of a side-by-side integrated heat exchanger showing an embodiment of the present invention, FIG. 15 is an enlarged perspective view of a main part of the heat exchanger, and FIG. Fig. 17 is a partially enlarged view showing the relationship of point joining.Fig. 17 shows the heat exchange shown as the first conventional example. FIG. 18 is a perspective view of a fin of a heat exchanger shown as a second conventional example. BEST MODE FOR CARRYING OUT THE INVENTION

 The present invention will be described in more detail with reference to the accompanying drawings.

 FIGS. 1 to 3 show a first embodiment, and a side-by-side integrated heat exchanger 1 is an integrated heat exchanger 1 composed of a condenser 5 and a Ladger 9 and is entirely made of an aluminum alloy. The condenser 5 is composed of a pair of tanks 2a and 2b arranged vertically in FIG. 1 and a plurality of flattened horizontal parts in FIG. 1 communicating with the pair of tanks 2a and 2b. And three corrugated fins 4 inserted and joined between the tubes 3. In addition, Rage 1 is a pair of tanks 6a and 6b which are formed separately from the tanks 2a and 2b of the condenser 5 and are arranged in the horizontal direction in FIG. 6a and 6b, and a plurality of flat tubes 7 in the vertical direction in FIG. 1 formed separately from the tube 3 of the capacitor 5, and the fins 4 of the capacitor 5 It is configured to have a fin 8 which is formed separately and inserted and joined between the tubes 7.

Each of the heat exchangers 5 and 9 is composed of a plurality of tubes 3 and 7 and fins 4 and 8, a heat exchange section (core) for exchanging heat between the fluid flowing through the tubes and the air passing between the fins. ) constitutes the 5 'and 9', it is constructed it it it Sai de plate 2 0 vertically and horizontally in its heat exchange portion 5 ,, 9 ^5, 2 0 and 2 1, 2 1 is provided They are assembled together facing each other.

The inside of the tube 3 of the condenser 5 is partitioned by a number of ribs. A flat tube having a known shape with increased strength is used. The tanks 2a and 2b of the condenser 5 are configured by closing both ends of a cylindrical tubular member 10 with lids 11, and a tube 3 is provided on the peripheral wall of the cylindrical member 10. A plurality of tube insertion holes 12 for inserting the holes are formed, and the inside is partitioned by partition walls 15 a, 15 b, and 15 c to define a plurality of flow chambers. An inlet 13 through which the refrigerant flows is provided at the tank portion forming the most upstream flow path chamber, and an outlet through which the refrigerant flows out is provided at the ink section forming the most downstream flow path chamber. Section 14 is provided.

 In the configuration example shown in Fig. 1, one tank 2a is divided into three flow passage chambers by partition walls 15a and 15b, and the other tank 2 is formed by one partition wall 15 The two flow chambers are defined by c, one of the tanks 2a is provided with an inlet 13 and an outlet 14, and the refrigerant entering from the inlet 13 is reciprocated between the tanks twice. It flows out of the outlet 14 through the outlet. In other words, the cross gusset (left-right flow) is the mainstream so that the oil returns well.

 The side plates 20 and 20 of the condenser 5 are brazed to the outermost fins (made of a clad material) 4 of the heat exchanging part 5 ′ and the tank (made of the clad material) )) Brazed to 2a and 2b. These side plates 20 and 20 are joined to the tanks 6a and 6b of the Ladée 9 below.

On the other hand, for the tube 7 of the Rajeshka 9, a flat tube of a known shape whose inside is not partitioned by a rib is used. In addition, tanks 6a and 6b of Lage 1 consist of a first tank member 16 having a U-shaped cross section in which a tube 7 through which a tube 7 is inserted is formed, and a first evening member 1 6 between the side walls of the 6 and the first tank member 16 The second tank member 1, which constitutes the peripheral wall of the tank 6, forms a tubular body having a rectangular cross section, and is configured by closing both ends of the tubular body with closing plates 18.

 The closing plate 18 is formed of a flat plate formed in a rectangular shape in accordance with the sectional shape of the tank, and has protrusions formed on two opposing sides. The protrusions are formed by the first tank member 16 and the second tank member. It is fitted in a fitting hole (not shown) formed in the tank member 17 and is attached to the opening of the cylindrical body.

 The second tank member 17 has a locking groove 17a formed by bending both sides into a U-shape so as to bulge. The first groove 17a is formed in the locking groove 17a. By fitting the end portions of the side walls of the first 6, the first ink link members 16 are joined to each other. The joint portion between the first sunset member 16 and the second tank member 17 is located at a position away from the portion joined to the tube 7, and is located outside the portion of the condenser 5 facing the tank 2. ing. One of the tanks 6b of Laje Night 9 is provided with an inlet 26 through which fluid flows in, and the other tank 6a is provided with an outlet 27 through which fluid flows out. In this case, the insides of both tanks 6a and 6b are not partitioned, and the fluid that has entered from the inlet 26 is transferred from one of the tanks 6b to the other tank 6a via the entire tube 7. It is moved and then flows out from the outlet 27. In other words, down flow (up and down flow), where the flow resistance of the cooling water is small, is the mainstream in Laje. In FIG. 1, reference numeral 24a denotes a cooling water intake port having a connection pipe 24b communicating with a sub-tank (not shown).

The cladding material in which the brazing material is clad on the outer surfaces of the first and second chunk members 16 and 17 of Rage 1 is used for the side wall 23 of the first chunk member 16. The end face of the side plate 20 of the capacitor 5 contacts The first tank member 16 is connected by the brazing material. That is, the heat exchanger 9, 5 and the condenser 5 are connected only by joining the first ink member 16, 16 of the heat exchange section 9 with the side plates 21, 21. Are integrated, not only the fins 4 and 8 but also the tubes 3 and 5 are kept in non-contact state, and the tanks 6a and 6b and 2a and 2b are also in non-contact state. In the above configuration, in order to manufacture the parallel-mounted heat exchanger 1 in which the condenser 5 and the Ladger 9 are integrated, first, the condenser 5 and the Ladder 9 are assembled separately. A large number of tubes 3 of the condenser 5 are laminated via the fins 4. Then, both ends of the tube 3 are inserted into the tube insertion holes 12 formed in the tanks 2a and 2b. Finally, the side plates 20 and 20 are arranged at the upper and lower ends of the outermost fins to form the heat exchange section 5. Of course, these are held together by jigs.

 At the same time, a large number of tubes 7 are stacked via fins 8 in Laje night. Then, both ends of the tube 7 are inserted into tube insertion holes (not shown) of the tanks 6a and 6b. Finally, the side plates 21 and 21 are arranged at the upper and lower ends of the outermost fins to form the heat exchange section 9 '. Naturally, these are held by a jig.

 Then, when the capacitor 5 and the Rajesh 9 9 are assembled, after the flux is applied, the capacitor 5 and the Rajeh 夕 9 are assembled together by a jig. This integral assembly is performed by bringing the side plates 20 and 20 of the capacitor 5 into contact with the side wall portions 23 of the first tank member 16 of the tank of the Ladger 9. Then, the flux is applied again where it is needed, put into the furnace, brazed in the furnace, and brazed.

That is, tube 3, tanks 2a and 2b, fin 4, and side The tubes 20 and 20 are brazed on the condenser 5 side with brazing material on the outer surfaces of the tanks 2a and 2b and the fin 4, and the tube 7 and the tanks 6a and 6b and the fin 8 and the side. Plates 21 and 21 were brazed on the 9th side of the lager with brazing material on the outer surfaces of tanks 6a and 6b and fin 8, and the end surfaces of side plates 20 and 20 were further brazed on the end of the lager. The brazing is performed on the side walls 23 of the tanks 2a and 2b of the 9 to complete the side-by-side integrated heat exchanger 1.

 The parallel integrated heat exchanger 1 manufactured in this way employs separate fins 4 and fins 8 and there is no heat transfer between the fins, so there is no adverse effect on the performance of each other. The performance can be prevented from deteriorating. Since the capacitor 5 and the Ladée 9 are integrated with only the side plates 20 and 20 and the tanks 2a and 2b, the other components such as the fins 4 and 8 and the tubes 3 and 7 are integrated. Fin pitch, fin plate thickness, fin height, tube plate thickness, tube height, etc. can be freely selected, and it is not necessary to make the condenser and radiator identical, and the optimal shape for each heat exchanger It can be said that. In addition, the tube 3 of the condenser 5 and the tube 7 of the Laje 9 are perpendicular to each other, and the longitudinal length of the tube 3 of the condenser 5 and the longitudinal direction of the tube 7 of the Laje 9 Can be freely set, and is different in the present embodiment.

FIGS. 4 to 6 show a second embodiment, in which a bent portion 29 is formed by bending an end of a side plate 20 of a capacitor 5. Thus, at the time of joining the cyclic de plate 2 0 and the tank 2 a, 2 b, by expanding the bonding area, the capacitors 5, corresponding to the dimensional deviation of the heat exchange unit 5 ^5, 9 ⁵ during assembly of Lage Isseki 9 As well as the degree of shrinkage due to the difference in the structure of the heat exchange parts 5 ', 9, during brazing. Things. In addition, not only the joint surface is increased, but also the brazing material that has been clad is also present on the joint surface, thereby improving the reliability of brazing. The other parts are the same as those in the first embodiment, and are denoted by the same reference numerals and description thereof is omitted.

 FIG. 7 shows a third embodiment, in which the tip of a bent portion 29 of the capacitor 5 is positioned by abutting against a second skunk member 17 constituting the tanks 6a and 6b. It is like that. As a result, it is possible to prevent a gap between the time of assembling and the time of brazing.

FIG. 8 shows a fourth embodiment, in which a bent portion 29 of the capacitor 5 is formed to be long. In this embodiment, the required performance of the capacitor 5 can be appropriately changed. That is, the bent portion 2 9 of length 1 ₂ is longer as 4 times strength of length 1 i of the bent portion 2 9 of the second embodiment shown in Figure 6. As a result, the front area is different, and even the small condenser 5 can be mounted in front of the large front area Lajé 9 to form an integrated heat exchanger.

 In the same figure, a fifth embodiment is shown. In the case of the long bent portion 29 as in the above-described embodiment, a window 36 is opened in the bent portion 29 to allow the cooling air to pass therethrough. It can be a road.

 FIG. 9 shows a sixth embodiment. In the case of the long bent portion 29 as in the above-described embodiment, a cutout 37 is formed in the bent portion 29 to perform the above-described operation. In the same manner as in the first embodiment, a cooling air passage can be provided.

In FIG. 10, the seventh embodiment is shown, in which the vertical length of Lage 9 (length between tanks) A and the vertical length of condenser 5 (length between side plates) Length) different from B, the capacitor 5 is short and in the center An example of the arrangement is shown.

 In FIG. 11, the eighth embodiment is shown, in which the vertical length A of the Lager 9 is different from the vertical length B of the capacitor 5, and the capacitor 5 is short and one side is different. (On the lower side in the figure). Thus, the embodiment shown in FIGS. 10 and 11 has a degree of freedom on the layout in the vertical direction.

 FIGS. 12 and 13 show the ninth embodiment, in which the capacitors 5 and Laje 9 have tanks 2a, 2 and tanks 6a, 6b, respectively. Are joined and integrated. That is, the brazing material which is provided at both ends of the tanks 2a and 2b of the condenser 5 and which is in contact with the side wall 23 of the first tank member 16 of Rage 9 and which is clad to the members at the time of brazing in the furnace. Brazed at.

 Even with this configuration, the connection between the relatively high strength parts (tank to tank) is made, and the capacitor 5 and Laje Ichi 9 are firmly integrated. The function and the effect are the same as those of the connection between the side plate 20 of the capacitor 5 and the tanks 2a and 2b of the Lager 1 9.

FIGS. 14 and 15 show the tenth embodiment, in which the capacitor 5 and the Lajes 9 are formed by bending the side portion 29 of the side plate 20 of the capacitor 5 and the tanks 2 a, 2b and the tanks 6a and 6b of Laje Night 9 are joined and integrated. That is, both ends of the tanks 2a and 2b of the condenser 5 and the bent portion 29 of the side plate 20 are formed on the side wall of the first sunset member 16 of the tanks 6a and 6b of the radiator 9. It comes in contact with 23 and is brazed with the brazing material clad into the members during brazing in the furnace. Also in this configuration, the connection with the relatively high strength part (tank and side plate and tank) is made, and the capacitor 5 and the Rajeshka 9 are firmly integrated. It has the same function and effect as the embodiment.

 Note that, in all the embodiments of the present invention, the fin 4 constituting the first heat exchanger 5 and the fin 8 constituting the second heat exchanger 9 are separate bodies, However, if the width of fins 4 and 8 is equal to or greater than the width of tubes 3 and 7, fins 4 and 8 will be in point contact with each other during brazing as shown in Fig. 16. It is inevitable that point joining occurs. However, even if it is a point contact or a point junction, the performance does not decrease much and does not cause a problem in actual use, and it is one of the embodiments of the present invention. The point contact refers to a point-like contact between the fin and the fin.The point contact refers to a fin having a filter medium attached thereto, and the brazing melts during brazing in the furnace. It refers to the point-like joint between fins. Industrial applicability

As described above, according to the present invention, in the side-by-side integrated heat exchanger, the first and second heat exchangers have separate fins to eliminate heat conduction, and Performance is no longer adversely affected. In addition, since the side plate and the tank or the tank and the tank, and the side plate and the tank and the tank are joined and brazed, the side plate and the tank are relatively high-strength members, and structurally. Coupling is strong and heat transfer is small because it is the outermost. In addition, the first and second heat exchangers are connected only by the side plate and the tank or the tank and the tank, and also by the side plate and the tank and the tank only. The structure can be obtained independently, and the optimum required performance can be obtained.

 The joint between the side plate and the tank may be not only at the end face of the side plate but also at the bent portion of the side plate. In this case, the joining range is widened and the heat at the time of assembling each heat exchanger is increased. It can cope with deviations in the dimensions of the exchange part (core), and can also cope with the difference in core shrinkage when brazing the two heat exchangers together.

 The tip of the bent portion abuts against the tank member of the tank, which is effective for positioning during assembly and preventing misalignment during brazing. Also, when the bent portion is formed long, the frontal area of one of the heat exchangers can be reduced, and optimum required performance can be obtained. Further, if a window or a notch is formed in the long bent portion, it does not obstruct the passage of the cooling air. Furthermore, by making the lengths of both heat exchangers in the vertical direction different, the degree of freedom on layout is also provided.

 It is desirable that the fins and fins of the first heat exchanger and the second heat exchanger do not contact each other, but the fins and the fins may be in point contact or point junction, and the deterioration in performance is not affected. There are few.

 A side-by-side integrated heat exchanger consists of separately assembling a first heat exchanger and a second heat exchanger that have different uses from each other, and then connecting both heat exchangers to the heat exchange medium flowing inside the tube. It is manufactured by brazing in an integrated furnace by assembling so that the flow directions differ by about 90 degrees, and it can contribute to cost reduction by brazing integration, and the direction of ventilation The space required for the vehicle is reduced, and it is easy to mount it on a vehicle.

Claims

The scope of the claims 1. The first heat exchanger and the second heat exchanger, which have different uses, are arranged one after the other in the ventilation direction, and the heat exchange medium inside the tubes of one heat exchanger and the other heat exchanger A side-by-side integrated heat exchanger characterized in that the flow directions are made different by approximately 90 degrees and brazed together.  2. The side-by-side heat exchanger according to claim 1, wherein the side plate of one of the heat exchangers and the tank of the other heat exchanger are brazed and joined.  3. The side-by-side integrated heat exchanger according to claim 1, wherein the tank of one of the heat exchangers and the tank of the other heat exchanger are joined by brazing.  4. The side-by-side integrated heat exchanger according to claim 1, wherein the tank and the side plate of one heat exchanger are joined to the tank of the other heat exchanger.  5. The side-by-side integrated heat exchanger according to claim 2 or 4, wherein an end surface of the side plate is joined to a side wall of the tank. 6. The side-by-side integrated heat exchanger according to claim 2 or 4, wherein a bent portion obtained by bending one end of the side plate is joined to a side wall portion of the evening bar. .  7. The side-by-side integrated heat exchanger according to claim 2 or 4, wherein a tip of a bent portion of the side plate is positioned by abutting against the ink member constituting the tank. 8. The method according to claim 2, 4 or 6, wherein a bent portion of at least one side plate of one heat exchanger is formed to be long. Side-by-side integrated heat exchanger.  9. The side-by-side integrated heat exchanger according to claim 6, wherein a window is formed in the long bent portion.  10. The side-by-side integrated heat exchanger according to claim 6 or 8, wherein a notch is formed in the long bent portion.  11. The side-by-side integrated heat exchanger according to claim 1, wherein the first heat exchanger and the second heat exchanger have different longitudinal lengths. 12. The range of Claims 1 to 4, wherein the length of the tube of the first heat exchanger in the longitudinal direction is different from the length of the tube of the second heat exchanger in the longitudinal direction. The parallel-integrated heat exchanger according to any one of the above. 13. The juxtaposition according to claim 1, wherein the fins and the fins of the first and second heat exchangers comprising the fin and the tube are not in contact with each other. Body heat exchanger.  14. The juxtaposition according to claim 1, wherein the fins and the fins of the first and second heat exchangers each comprising a fin and a tube are in point contact with each other. Integrated heat exchanger.  15. The juxtaposition according to claim 1, wherein the fins and the fins of the first and second heat exchangers each comprising a fin and a tube are point-joined. Integrated heat exchanger.  1 6. Assemble the first heat exchanger and the second heat exchanger with different applications separately from each other, and then connect one heat exchanger and the other heat exchanger to the heat exchange flowing inside the tube. A method for manufacturing a side-by-side integrated heat exchanger, comprising: assembling the medium so that the medium flow directions are different from each other by approximately 90 degrees;