JP2008175508A - Composite heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite heat exchanger, inspecting and confirming joining failure of a separator while preventing lowering of rigidity of a head tank and increase in the number of manufacturing man-hour. <P>SOLUTION: The head tank 5 includes a core plate 5a to which first and second tubes 21, 22 and a dummy tube are joined, wherein the head tank is so constructed that the tank internal space is partitioned into a first space 50A communicates with the first tube 21, a second space 50B communicates with the second tube 22, and a third space 50C communicates with the dummy tube 6, two separators 7a spaced from each other at a predetermined distance are provided, a core plate 5a is provided with a dummy tube insert hole 53 in which both ends in the longitudinal direction of the dummy tube 6 are inserted and joined, a clearance gap 9 is set between the outer surface of the dummy tube 6 and the inner peripheral edge part of the dummy tube insert hole 503, and the third space 50C and the outside of the head tank 5 are connected to each other through the clearance gap 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a composite heat exchanger having a plurality of heat exchanger sections.

  In vehicles such as automobiles, in addition to a radiator for cooling engine cooling water and a condenser for cooling air conditioning refrigerant, an oil cooler for oil cooling in a torque converter for vehicle automatic transmission, and an oil cooler for cooling engine oil. In recent years, so-called hybrid vehicles are provided with many heat exchangers such as a radiator for cooling electronic components such as an inverter for controlling an electric motor.

  In recent years, it has been desired to reduce the width of heat exchangers associated with vehicle collision safety, to reduce installation space by reducing the size, and to reduce the number of assembly work steps. As the correspondence, the first heat exchanger section independent from each other in one heat exchanger core by partitioning the left and right header tanks of one heat exchanger with partition plates (separators) at positions corresponding to each other. There has been proposed a composite heat exchanger that has two heat exchanger functions of the second heat exchanger section (see, for example, Patent Document 1).

Further, in such a composite heat exchanger, the space in the header tank is divided into three spaces by two partition plates, and a through hole is formed in the space formed between the two partition plates. And inspecting and confirming the bonding failure of the partition plate from this through hole (for example, see Patent Document 2).
US Pat. No. 6,394,176 JP 2003-28592 A

  However, in the composite heat exchanger described in Patent Document 2, since the through hole is formed in the header tank, there is a problem that the rigidity of the header tank is lowered. Further, since a process for forming a through hole in the header tank is required, there are problems that the number of manufacturing steps increases and the manufacturing cost increases.

  In view of the above points, the present invention has an object to provide a composite heat exchanger capable of inspecting and confirming a bonding failure of a partition plate while suppressing a decrease in rigidity of a header tank and an increase in manufacturing man-hours. To do.

  In order to achieve the above object, in the present invention, a plurality of first tubes (21) through which a first fluid flows are stacked, and the first fluid and air are heat-exchanged to form the first fluid. A plurality of first heat exchanger sections (100) for cooling the second tube (22) through which the second fluid flows are stacked in the stacking direction of the first tubes (21), Between the first tube (21) and the second tube (22), the second heat exchanger part (200) that cools the second fluid by exchanging heat between the second fluid and air. A dummy tube (6) in which neither the first fluid nor the second fluid flows, and the longitudinal ends of the first and second tubes (21, 22) and the dummy tube (6), respectively. Each tube (21, 22, 6) extends in the stacking direction of the tubes (21, 22, 6) and A header tank (5) that passes therethrough, and the first heat exchanger part (100) and the second heat exchanger part (200) are integrated by the same header tank (5). A combined heat exchanger, the header tank (5) includes a core plate (5a) to which each tube (21, 22, 6) is joined, and a tank that constitutes a tank internal space together with the core plate (5a). The header tank (5) has a first space (50A) and a second tube (22) that communicate with the first tube (21). And a second space (50B) communicating with the third space (50C) communicating with the dummy tube (6), and two partition plates (71) spaced apart from each other by a predetermined distance are provided. On the core plate (5a) The first tube insertion hole (501) in which both longitudinal ends of the first tube (21) are inserted and joined, and the both longitudinal ends of the second tube (22) are inserted and joined. 2 and a dummy tube insertion hole (503) into which both end portions in the longitudinal direction of the dummy tube (6) are inserted and joined, and the outer surface of the dummy tube (6) and the dummy tube are formed. A gap (9) is set between the inner peripheral edge of the insertion hole (503), and the third space (50C) and the outside of the header tank (5) are connected via the gap (9). It is characterized by communication.

  In this way, it is possible to inspect and confirm the bonding failure of the partition plate (71) from the gap (9). At this time, since it is not necessary to form a through hole in the header tank (5), a decrease in the rigidity of the header tank (5) can be suppressed. Further, it is not necessary to add a manufacturing process for forming a through hole in the header tank (5). Therefore, it is possible to inspect and confirm the bonding failure of the partition plate (71) while suppressing a decrease in the rigidity of the header tank (5) and an increase in the number of manufacturing steps.

  In the composite heat exchanger having the above characteristics, each tube (21, 22, 6) has a flat cross-sectional shape, and the stacking direction of the tubes (21, 22, 6) is the tube stacking direction. When the longitudinal direction of each tube (21, 22, 6) is the tube longitudinal direction, and the direction perpendicular to both the tube stacking direction and the tube longitudinal direction is the tube width direction, the dummy tube (6) and the dummy tube The length of either the tube stacking direction or the tube width direction may be equal to the insertion hole (503).

  By the way, in the composite heat exchanger, all the components are temporarily assembled in a predetermined heat exchanger structure, and the assembly is temporarily fixed with a jig or the like, and then the temporarily fixed assembly is heated for brazing. It is manufactured by heating in a furnace and integrally joining each joint portion of the composite heat exchanger with a brazing material. At the time of this temporary fixing, it is necessary to prevent the dummy tube (6) from dropping from the dummy tube insertion hole (503) of the core plate (5a).

  Therefore, by making the length of either the tube stacking direction or the tube width direction of the dummy tube (6) and the dummy tube insertion hole (503) equal, the dummy tube (6) can be attached without requiring a special jig. It can fix in the state inserted in the dummy tube insertion hole (503). For this reason, it can suppress that a dummy tube (6) falls out of a dummy tube insertion hole (503) at the time of temporary fixing.

Further, the composite heat exchanger of the above features, the length of the tube width direction of the first tube ₍₂₁₎ (W 1), the length of the tube width direction of the second tube (22) (W ₂₎ The length (H ₁ ) of the first tube (21) in the tube stacking direction is shorter than the length (H ₂ ) of the second tube (21) in the tube stacking direction, The first tube insertion hole (501) is in contact with the first tube (21) without a gap, and the second tube insertion hole (502) is in contact with the second tube (22) without a gap. The dummy tube (6) has the same shape as the first tube (21), and the dummy tube insertion hole (503) has the same shape as the second tube insertion hole (502). It may be.

  According to this, since the gap (9) can be formed between the outer surface of the long side (6a) of the dummy tube (6) and the inner peripheral edge of the dummy tube insertion hole (503), the header tank (5 It is possible to inspect and confirm the bonding failure of the partition plate (71) while suppressing the decrease in rigidity and the increase in the number of manufacturing steps.

  Further, by using the first tube (21) as the dummy tube (6), there is no need to newly increase the types of tubes for the dummy tube (6). Furthermore, since the dummy tube insertion hole (503) has the same shape as the second tube insertion hole (502), it is not necessary to add a special manufacturing process for forming the dummy tube insertion hole (503). Therefore, it is possible to improve the productivity of the composite heat exchanger that can inspect and confirm the bonding failure of the partition plate (71).

Further, the composite heat exchanger of the above features, the length of the tube width direction of the first tube ₍₂₁₎ (W 1), the length of the tube width direction of the second tube (22) (W ₂₎ The length (H ₁ ) of the first tube (21) in the tube stacking direction is equal to the length (H ₂ ) of the second tube (21) in the tube stacking direction, The first tube insertion hole (501) is in contact with the first tube (21) without a gap, and the second tube insertion hole (502) is in contact with the second tube (22) without a gap. The dummy tube (6) has the same shape as the first tube (21), and the dummy tube insertion hole (503) has the same shape as the second tube insertion hole (502). It may be.

  According to this, since the gap (9) can be formed between the outer surface of the short side (6b) of the dummy tube (6) and the inner peripheral edge of the dummy tube insertion hole (503), the header tank (5 It is possible to inspect and confirm the bonding failure of the partition plate (71) while suppressing the decrease in rigidity and the increase in the number of manufacturing steps.

  In the composite heat exchanger having the above characteristics, the first fluid is a refrigerant circulating in the refrigeration cycle, and the first heat exchanger section cools the refrigerant by exchanging heat between the refrigerant and air. The capacitor part (100) to be used may be used.

  In the composite heat exchanger having the above characteristics, the condenser unit (100) includes a condensing unit (110) for condensing the refrigerant, and a supercooling unit (120) for supercooling the refrigerant flowing in from the condensing unit (110). You may have.

  Further, in the composite heat exchanger having the above characteristics, the second fluid is oil of on-vehicle equipment, and the second heat exchanger section is an oil cooler that heats oil and air to cool the oil. Part (200).

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. In this embodiment, a case where the composite heat exchanger according to the present invention is applied to a vehicle that travels using an internal combustion engine (engine) as a drive source will be described as an example.

  FIG. 1 is a cross-sectional view showing a composite heat exchanger 1 according to the first embodiment. As shown in FIG. 1, the composite heat exchanger 1 of the present embodiment includes a core portion 4 composed of a plurality of tubes 2 and fins 3, and a pair of headers that are assembled and arranged at both left and right end portions of the core portion 4. And a tank 5.

  The tube 2 is a tube through which a heat medium (in this embodiment, refrigerant or oil) flows, and the tube 2 is formed in a flat shape so that the air flow direction (the direction perpendicular to the paper surface) coincides with the major axis direction. , A plurality of them are arranged in parallel in the vertical direction so that the longitudinal direction thereof coincides with the horizontal direction. The fin 3 is formed into a wave shape and joined to the flat surfaces on both sides of the tube 2, and the fin 3 increases the heat transfer area with air to promote heat exchange between the heat medium and air. Yes.

  The header tank 5 extends in a direction (vertical direction in the present embodiment) orthogonal to the longitudinal direction of the tube 2 at the longitudinal end portions (in the present embodiment, left and right ends) of the tube 2 and communicates with the plurality of tubes 2. Therefore, the header tank 5 includes a core plate 5a into which the tube 2 is inserted and joined, and a tank main body 5b that forms a tank internal space together with the core plate 5a. Of the pair of header tanks 5, the header tank located on the left side in FIG. 1 is called a first header tank 51, and the header tank located on the right side in FIG. 1 is called a second header tank 52.

  The core unit 4 includes a condenser unit 100 that cools the refrigerant by exchanging heat between the refrigerant circulating in the vehicle refrigeration cycle (air conditioner) and air, and an oil cooler that cools the oil in the torque converter for the vehicle automatic transmission. The unit 200 is configured. In the present embodiment, the capacitor unit 100 is disposed on the lower side, and the oil cooler unit 200 is disposed on the upper side.

  Here, among the plurality of tubes 2, the tube that constitutes the capacitor unit 100 and through which the refrigerant flows is referred to as the first tube 21, and the oil cooler unit 200 that constitutes the oil cooler 200 and the tube through which the oil flows circulates. That's it. The condenser unit 100 corresponds to the first heat exchanger unit of the present invention, and the oil cooler unit 200 corresponds to the second heat exchanger unit. Further, the refrigerant corresponds to the first fluid of the present invention, and the oil corresponds to the second fluid.

  Inside the header tank 5, two first separators 71 are arranged at a boundary portion (between the first tube 21 and the second tube 22) between the capacitor unit 100 and the oil cooler unit 200. Yes. The two first separators 71 are provided with a predetermined distance from each other. Thereby, the inside of the header tank 5 is divided into three in the header tank longitudinal direction (vertical direction) with the two first separators 71 as a boundary. The first separator 71 corresponds to the partition plate of the present invention.

  Here, in the header tank 5, the space below the two first separators 71 is referred to as a first space 50A, and the space above the two first separators 71 is referred to as a second space 50B. The space between the two separators 71 is referred to as a third space 50C. The first space 50 </ b> A communicates with the first tube 21, and the second space 50 </ b> B communicates with the second tube 22. Further, the third space 50 </ b> C does not communicate with any of the first and second tubes 21 and 22. For this reason, the third space 50C acts as a space for heat insulation.

  Between the first tube 21 and the second tube 22, a dummy tube 6 in which a heat medium (refrigerant and oil) does not flow is disposed. The dummy tube 6 communicates with the third space 50C.

  Next, the configuration of the oil cooler unit 200 will be described. The oil cooler 200 is a U-turn type in which the oil flow is U-shaped. Hereinafter, the second space 50B in the first header tank 51 is referred to as a first oil header portion 51a, and the second space 50B in the second header tank 52 is referred to as a second oil header portion 52a.

  The first oil header portion 51 a is provided with an oil inlet portion 31 through which oil flows into the oil cooler portion 200 and an oil outlet portion 32 through which oil flows out of the oil cooler portion 200. The oil inlet portion 31 and the oil outlet portion 32 are provided on the upper end side and the lower end side of the first oil header portion 51a, respectively.

  Further, a second separator 72 for making the oil flow inside the oil cooler portion 200 U-shaped is provided inside the first oil header portion 51a. In more detail, the 2nd separator 72 is arrange | positioned between the oil inlet part 31 and the oil outlet part 32 in the inside of the 1st oil header part 51a.

  Next, the configuration of the capacitor unit 100 will be described. In the first space 50 </ b> A (hereinafter referred to as the first refrigerant header portion 51 b) in the first header tank 51, the refrigerant inlet portion 33 through which the refrigerant flows into the condenser portion 100 and the refrigerant flows out of the condenser portion 100. A refrigerant outlet portion 34 is provided. The refrigerant inlet portion 33 and the refrigerant outlet portion 34 are provided on the upper end side and the lower end side of the first refrigerant header portion 51b, respectively.

  A third separator 73 is disposed at a position closer to the lower side inside the first refrigerant header portion 51b. A fourth separator 74 is disposed at the same height as the third separator 73 in the first space 50 </ b> A (hereinafter referred to as the second refrigerant header portion 52 b) in the second header tank 52. . The capacitor unit 100 is divided into two heat exchange units by the third and fourth separators 73 and 74.

  The upper part of the third and fourth separators 73 and 74 in the capacitor unit 100 is a condensing unit 110 that heat-exchanges the gas-phase refrigerant flowing from the refrigerant inlet 33 and the air to condense the refrigerant. The refrigerant that has flowed out of the condensing unit 110 flows into the modulator 8 described later.

  In addition, the lower part of the third and fourth separators 73 and 74 in the capacitor unit 100 is a supercooling unit 120 that cools the liquid phase refrigerant by exchanging heat between the liquid phase refrigerant and air that have flowed from the modulator 8 described later. Thus, the refrigerant cooled by the supercooling section 120 flows out from the refrigerant outlet section 34.

  The condensing unit 110 is an S-shaped turn type in which the refrigerant flow is S-shaped. Inside the first refrigerant header portion 51b and the second refrigerant header portion 52b, fifth separators 75 for making the refrigerant flow inside the condensing portion 110 into an S shape are respectively provided.

  In addition, a substantially cylindrical modulator 8 extending in the vertical direction is disposed outside the second header tank 52 (on the opposite side of the core portion 4). The modulator 8 separates the gas-phase refrigerant and the liquid-phase refrigerant and stores the liquid-phase refrigerant. The modulator 8 is joined to the second header tank 52 by brazing.

  The modulator 8 and the second refrigerant header portion 52b communicate with each other at two locations via the refrigerant inlet 81 and the refrigerant outlet 82. Specifically, the refrigerant inflow port 81 communicates a portion of the second refrigerant header portion 52b above the fourth separator 74 with the inside of the modulator 8. In addition, the refrigerant outlet 82 communicates a portion of the second refrigerant header portion 52b below the fourth separator 74 with the inside of the modulator 8. That is, the refrigerant inlet 81 is disposed above the refrigerant outlet 82.

  The modulator 8 has an internal space 83 that gas-liquid separates the refrigerant that has flowed out of the capacitor unit 100. The internal space 83 is connected to the refrigerant inlet 81 and the refrigerant outlet 82. Of the refrigerant flowing in from the refrigerant inlet 81, the liquid phase refrigerant having a large specific gravity temporarily accumulates below the internal space 83 in the vertical direction (gravity direction), and the gas phase refrigerant having a small specific gravity is in the vertical direction of the internal space 83 ( Gravity direction) once accumulated on the upper side. Further, a filter 84 for removing foreign substances in the refrigerant is provided at the lower end portion of the internal space 83 of the modulator 8.

  FIG. 2A is an enlarged cross-sectional view showing the vicinity of the first separator 71 in the first embodiment, and FIG. 2B is a cross-sectional view taken along line AA in FIG. Hereinafter, the direction orthogonal to both the tube stacking direction and the tube longitudinal direction is referred to as a tube width direction.

As shown in FIGS. 2A and 2B, the length H1 of the _first tube 21 in the tube stacking direction is shorter than the length H2 of the _second tube 22 in the tube stacking direction. The length of the tube width direction of the first tube 21 W ₁ and tube width direction length W ₂ of the second tube 22 is equal.

  Thereby, the flow path cross-sectional area of the second tube 22 is larger than the flow path cross-sectional area of the first tube 21. Therefore, the oil passage resistance can be reduced in the second tube 22 through which oil having higher viscosity than the refrigerant flows.

  A large number of tube insertion holes are formed in the core plate 5a along the tube stacking direction in which both longitudinal ends of the first and second tubes 21 and 22 and the dummy tube 6 are inserted and joined. Hereinafter, the tube insertion hole into which the first tube 21 is inserted is referred to as a first tube insertion hole 501, the tube insertion hole into which the second tube 22 is inserted is referred to as a second tube insertion hole 502, and a dummy tube The tube insertion hole into which 6 is inserted is referred to as a dummy tube insertion hole 503.

  The first tube insertion hole 501 has a shape corresponding to the first tube 21 so that the outer surface of the first tube 21 and the inner peripheral edge of the first tube insertion hole 501 are in contact with each other without a gap. It has become. Similarly, the second tube insertion hole 502 has a shape corresponding to the second tube 22, and the outer surface of the second tube 22 and the inner peripheral edge of the first tube insertion hole 502 are in contact with each other without a gap. It is supposed to be.

  In the present embodiment, the dummy tube 6 is a tube having the same shape as the first tube 21. The dummy tube insertion hole 503 is formed in the same shape as the second tube insertion hole 502. Therefore, the dummy tube 6 and the dummy tube insertion hole 503 have the same length in the tube width direction. For this reason, the outer surface of the dummy tube 6 is in contact with the inner peripheral edge of the dummy tube insertion hole 503 in the tube width direction.

  As shown in FIG. 2B, the cross-sectional shape when viewed from the longitudinal direction of the dummy tube 6 is a flat shape having a long side 6a and a short side 6b. And in this embodiment, the dummy tube 6 contacts the inner peripheral part of the dummy tube insertion hole 503 in the outer surface of the short side 6b, and contacts the inner peripheral part of the dummy tube insertion hole 503 in the outer surface of the long side 6a. It is supposed not to. That is, a part of the outer surface of the dummy tube 6 is in contact with the inner peripheral edge portion of the dummy tube insertion hole 503, and there is a gap between the outer surface of the long side 6 a of the dummy tube 6 and the inner peripheral edge portion of the dummy tube insertion hole 503. 9 is formed. In the gap 9, the third space 50C communicates with the outside.

  Next, the outline of the manufacturing method of the composite heat exchanger 1 according to the first embodiment will be described.

  First, a temporary assembly process is performed in which the composite heat exchanger 1 is temporarily assembled into a predetermined heat exchanger structure as shown in FIG. In this temporary assembly step, the first and second tubes 21 and 22, the dummy tube 6, the core plate 5a, the tank body 5b, the fin 3 and the first to fifth separators 71 to 75 are assembled at predetermined positions, respectively. The assembly is temporarily fixed using an appropriate jig such as a wire.

  Next, a brazing process is performed for brazing the composite heat exchanger assembly temporarily fixed by the jig. In this brazing step, the composite heat exchanger assembly is carried into a brazing heating furnace, and the composite heat exchanger assembly is heated to a brazing temperature for a predetermined time in the heating furnace. And the composite heat exchanger assembly is carried out of the heating furnace and cooled.

  Thereby, each joining site | part of a composite type heat exchanger can be integrally joined by a brazing material, and each component of the composite type heat exchanger 1 can be assembled | attached to an integral structure.

  Next, a modulator fixing step of fixing the modulator 8 to the composite heat exchanger 1 is performed. In the present embodiment, the modulator 8 is joined to the second header tank 52 by brazing.

  As described above, by providing the gap 9 between the outer surface of the long side 6a of the dummy tube 6 and the inner peripheral edge of the dummy tube insertion hole 503, the bonding failure of the first separator 71 is inspected and confirmed from the gap 9. can do. At this time, since it is not necessary to form a through hole in the header tank 5, it is possible to suppress a decrease in the rigidity of the header tank 5. Further, it is not necessary to add a manufacturing process for forming a through hole in the header tank 5. Therefore, it is possible to inspect and confirm the bonding failure of the first separator 71 while suppressing the decrease in the rigidity of the header tank 5 and the increase in the number of manufacturing steps.

  Further, by making the dummy tube 6 and the dummy tube insertion hole 503 have the same length in the tube width direction, the dummy tube 6 is fixed in a state of being inserted into the dummy tube insertion hole 503 without requiring a special jig. be able to. For this reason, it can suppress that the dummy tube 6 falls from the dummy tube insertion hole 503 at the time of temporary fixing.

  Further, by using the first tube 21 as the dummy tube 6, it is not necessary to newly increase the types of tubes for the dummy tube 6. In addition, since the dummy tube insertion hole 503 has the same shape as the second tube insertion hole 502, it is not necessary to add a special manufacturing process for forming the dummy tube insertion hole 503. Therefore, it becomes possible to improve the productivity of the composite heat exchanger 1 that can inspect and confirm the bonding failure of the first separator 71.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

FIG. 3 is an enlarged sectional view of the surface of the core plate 5a in the second embodiment, and corresponds to FIG. 2 (b). As shown in FIG. 3, the length of the tube stacking direction of the first tube 21 H ₁ and tube stacking direction length H ₂ of the second tube 22 is equal. Further, the length W ₁ of the first tube 21 in the tube width direction is shorter than the length W _{2 of} the second tube 22 in the tube width direction.

  For the dummy tube 6, a tube having the same shape as the first tube 21 is used. Further, the dummy tube insertion hole 503 formed in the core plate 5 a is formed in the same shape as the second tube insertion hole 502. Therefore, the dummy tube 6 and the dummy tube insertion hole 503 have the same length in the tube stacking direction. For this reason, the dummy tube 6 can be fixed in the state inserted in the dummy tube insertion hole 503, without requiring a special jig. Thereby, it can suppress that the dummy tube 6 falls from the dummy tube insertion hole 503 at the time of temporary fixing.

  Further, the outer surface of the dummy tube 6 is in contact with the inner peripheral edge of the dummy tube insertion hole 503 in the tube stacking direction. More specifically, the dummy tube 6 is in contact with the inner peripheral edge of the dummy tube insertion hole 503 on the outer surface of the long side 6a, and is not in contact with the inner peripheral edge of the dummy tube insertion hole 503 on the outer surface of the short side 6b. It has become. That is, a gap 9 is formed between the outer surface of the short side 6 b of the dummy tube 6 and the inner peripheral edge of the dummy tube insertion hole 503. In the gap 9, the third space 50C communicates with the outside.

  As in this embodiment, by providing the gap 9 between the outer surface of the short side 6b of the dummy tube 6 and the inner peripheral edge of the dummy tube insertion hole 503, the bonding failure of the first separator 71 is inspected from the gap 9. Since it can be confirmed, the same effect as the first embodiment can be obtained.

(Other embodiments)
In each of the above embodiments, the oil cooler 200 that cools the oil in the torque converter for the vehicle automatic transmission is applied as the second heat exchanger. However, the present invention is not limited to this, and the oil cooler for cooling the engine oil is used. Further, an oil cooler for cooling the power steering oil, an intercooler for cooling the intake air by exchanging heat between the intake air and air of the engine pressurized by the supercharger may be applied.

  Moreover, in each said embodiment, although the capacitor | condenser part 100 was comprised so that it might have the condensation part 110 and the supercooling part 120, it does not need to provide not only this but the supercooling part 120.

  Moreover, in each said embodiment, although the example arrange | positioned in order of the oil cooler part 200, the condensing part 110, and the supercooling part 120 in the composite heat exchanger 1 from upper direction was demonstrated, it is not restricted to this, An oil cooler is mentioned from upper direction. 200, the supercooling unit 120, and the condensing unit 110 may be arranged in this order, or the supercooling unit 120, the condensing unit 110, and the oil cooler unit 200 may be arranged in this order from above, and the condensing unit 110 from above. The supercooling unit 120 and the oil cooler unit 200 may be arranged in this order.

  In each of the above embodiments, the example in which the modulator 8 is integrated with the composite heat exchanger 1 by brazing has been described. However, the present invention is not limited to this, and the composite heat exchanger 1 and the modulator 8 may be separated. Good. In this case, the modulator 8 may be fixed to the composite heat exchanger 1 via a bracket, for example.

  In each of the above embodiments, the dummy tube 6 has the same shape as the first tube 21 and the dummy tube insertion hole 503 has the same shape as the second tube insertion hole 502. Any shape can be used as long as the gap 9 is formed between the outer surface of the dummy tube 6 and the inner peripheral edge of the dummy tube insertion hole 503.

  Further, in each of the above embodiments, the embodiment in which the present invention is applied to the cross-flow type composite heat exchanger 1 in which the heat medium (refrigerant or oil) flows in the horizontal direction has been described. However, the heat medium flows in the vertical direction. The present invention can also be applied to a downflow type composite heat exchanger.

It is sectional drawing which shows the composite heat exchanger 1 which concerns on 1st Embodiment. (A) is an expanded sectional view showing the 1st separator 71 neighborhood in a 1st embodiment, and (b) is an AA sectional view of (a). It is an expanded sectional view of the core plate 5a surface in 2nd Embodiment, and is a figure corresponding to FIG.2 (b).

Explanation of symbols

  5 ... header tank, 5a ... core plate, 5b ... tank body, 6 ... dummy tube, 9 ... gap, 21 ... first tube, 22 ... second tube, 50A ... first space, 50B ... second 50C ... third space, 71 ... first separator (partition plate), 100 ... condenser part (first heat exchanger part), 110 ... condensing part, 120 ... supercooling part, 200 ... oil cooler Part (second heat exchanger part), 501... First tube insertion hole, 502, second tube insertion hole, 503... Dummy tube insertion hole.

Claims (7)

A first heat exchanger configured by stacking a plurality of first tubes (21) through which the first fluid flows, and cooling the first fluid by exchanging heat between the first fluid and air. Part (100),
A plurality of second tubes (22) through which the second fluid flows are stacked in the stacking direction of the first tubes (21), and the second fluid and the air are heat-exchanged to A second heat exchanger section (200) for cooling the second fluid;
A dummy tube (6) disposed between the first tube (21) and the second tube (22), in which neither of the first and second fluids flows;
The first and second tubes (21, 22) and the dummy tube (6) are respectively disposed at both ends in the longitudinal direction, and extend in the stacking direction of the tubes (21, 22, 6). , 22, 6) and a header tank (5) communicating with
A composite heat exchanger having a structure in which the first heat exchanger section (100) and the second heat exchanger section (200) are integrated by the same header tank (5). ,
The header tank (5) includes a core plate (5a) to which the tubes (21, 22, 6) are respectively joined, and a tank body (5b) that constitutes a tank internal space together with the core plate (5a). Have
In the header tank (5), a first space (50A) that communicates the space in the tank with the first tube (21) and a second space that communicates with the second tube (22) ( 50B) and a third space (50C) communicating with the dummy tube (6), and two partition plates (71) spaced apart from each other by a predetermined distance are provided,
A first tube insertion hole (501) in which both longitudinal ends of the first tube (21) are inserted and joined to the core plate (5a), and a longitudinal direction of the second tube (22) A second tube insertion hole (502) into which both ends are inserted and joined, and a dummy tube insertion hole (503) into which both ends in the longitudinal direction of the dummy tube (6) are inserted and joined are formed. ,
A gap (9) is set between the outer surface of the dummy tube (6) and the inner peripheral edge of the dummy tube insertion hole (503),
The composite heat exchanger, wherein the third space (50C) and the outside of the header tank (5) communicate with each other through the gap (9). Each of the tubes (21, 22, 6) has a flat cross-sectional shape,
The stacking direction of the tubes (21, 22, 6) is the tube stacking direction, the longitudinal direction of the tubes (21, 22, 6) is the tube longitudinal direction, and the tube stacking direction and the tube longitudinal direction are the same. When the direction perpendicular to both is the tube width direction,
2. The composite mold according to claim 1, wherein the dummy tube (6) and the dummy tube insertion hole (503) have the same length in either the tube stacking direction or the tube width direction. Heat exchanger. The tube width direction length (W ₁ ) of the first tube (21) is equal to the tube width direction length (W ₂ ) of the second tube (22),
The length (H ₁ ) of the _first tube (21) in the tube stacking direction is shorter than the length (H ₂ ) of the second tube (21) in the tube stacking direction,
The first tube insertion hole (501) comes into contact with the first tube (21) without a gap,
The second tube insertion hole (502) is in contact with the second tube (22) without a gap,
The dummy tube (6) has the same shape as the first tube (21),
The composite heat exchanger according to claim 2, wherein the dummy tube insertion hole (503) has the same shape as the second tube insertion hole (502). The tube width direction length (W ₁ ) of the first tube (21) is shorter than the tube width direction length (W ₂ ) of the second tube (22),
The length (H ₁ ) of the _first tube (21) in the tube stacking direction is equal to the length (H ₂ ) of the second tube (21) in the tube stacking direction,
The first tube insertion hole (501) comes into contact with the first tube (21) without a gap,
The second tube insertion hole (502) is in contact with the second tube (22) without a gap,
The dummy tube (6) has the same shape as the first tube (21),
The composite heat exchanger according to claim 2, wherein the dummy tube insertion hole (503) has the same shape as the second tube insertion hole (502). The first fluid is a refrigerant circulating in the refrigeration cycle,
The said 1st heat exchanger part is a capacitor | condenser part (100) which heat-exchanges the said refrigerant | coolant and air and cools the said refrigerant | coolant, The Claim 1 characterized by the above-mentioned. Combined heat exchanger. The condenser unit (100) includes a condensing unit (110) that condenses the refrigerant, and a supercooling unit (120) that supercools the refrigerant flowing in from the condensing unit (110). The composite heat exchanger according to claim 5. The second fluid is oil for vehicle equipment,
The said 2nd heat exchanger part is an oil cooler part (200) which heat-exchanges the said oil and air, and cools the said oil, The one of Claim 1 thru | or 6 characterized by the above-mentioned. Combined heat exchanger.

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