Heat exchanger and method for manufacturing heat exchanger

Abstract

To enable stable brazing of a heat exchanger.SOLUTION: A heat exchanger 10 includes an inner member 30 having an inner bottom part 40 and inner wall parts 42 erected in both side parts of the inner bottom part 40 and having an approximately U-shaped cross section. The heat exchanger 10 includes an outer member 32 having an outer bottom part 80 opposing to the inner bottom part 40 and outer wall parts 82 erected in both end parts of the outer bottom part 80 and formed to have an approximately U-shaped cross section. The inner member 30 includes a projection 70 projecting outwardly at a position where a second distance K2 as a distance to the inner bottom part 40 is smaller than a first position K1 as a distance to a tip of the inner wall part 42. The outer member 32 includes: a hole 90 that is formed on the outer wall part 82 and to which the projection 70 is inserted; and slits 94 provided at both side parts in a length direction L of the hole 90 and extending in an erecting direction 92 of the outer wall part 82. The inner wall part 30 is formed at height covering and hiding the slit 94.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a heat exchanger and a method for manufacturing the heat exchanger.

Background Art

[0002] Patent Document 1 discloses a heat exchanger. The tank body of the heat exchanger is formed by a tube plate having a U-shaped cross section and a tank plate having a U-shaped cross section.

[0003] The claw portion formed on the tube plate is bent and locked to the locking hole of the tank plate. Thereby, the tube plate and the tank plate are coupled to form a tank body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the heat exchanger described in Patent Document 1, since the claw portion of the tube plate is plastically deformed to form the tank body, the gap between the connection portions of the tube plate and the tank plate changes depending on the bent state of the claw portion. When the gap between the connection portions of the tube plate and the tank plate changes, there is a risk that the brazing property of the tank body deteriorates.

[0006] The present invention has been made in view of the above problems, and an object thereof is to enable stable brazing of a heat exchanger.

Means for Solving the Problems

[0007] According to an aspect of the present invention, a heat exchanger is a heat exchanger including a hollow tank, and includes an inner bottom portion extending in the longitudinal direction of the tank, and inner wall portions erected on both side portions of the inner bottom portion, and an inner member formed in a substantially U-shaped cross section having the same, an outer bottom portion extending in the longitudinal direction in a state facing the inner bottom portion, and outer wall portions erected on both side portions of the outer bottom portion and disposed outside the inner wall portions, and an outer member formed in a substantially U-shaped cross section having the same and covering the outer periphery of the inner member to form the tank. The inner member has a protrusion protruding outward at a position where the distance from the inner bottom portion is smaller than the distance from the tip of the inner wall portion. The outer member has a hole formed in the outer wall portion into which the protrusion is inserted, and slits provided on both side portions in the longitudinal direction of the hole and extending in the erected direction of the outer wall portion. The inner wall portion is formed at a height that covers the slits.

Advantages of the Invention

[0008] In the above aspect, slits extending in the erected direction of the outer wall portion are formed on both side portions of the hole of the outer member into which the protrusion of the inner member is inserted, and the hole is formed in a side piece portion sandwiched between both slits. Therefore, when inserting the protrusion of the inner member into the hole of the outer member, the protrusion is inserted into the hole by elastic deformation of the side piece portion formed between both slits. And in a state where the protrusion is inserted into the hole, the deformed side piece portion returns to its original position.

[0009] Therefore, compared with the case where the claw portion of the tube plate is plastically deformed to connect the tube plate and the tank plate to form a tank, the heat exchanger formed of the inner member and the outer member can suppress changes in the gap that can occur between the outer member and the inner member. Thereby, the heat exchanger can stably perform brazing of the inner member and the outer member.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

MODE FOR CARRYING OUT THE INVENTION

[0011] Hereinafter, with reference to the drawings, the heat exchanger 10 according to an embodiment of the present invention will be described.

[0012] First, with reference to FIG. 1, the overall configuration of the heat exchanger 10 will be described. FIG. 1 is a front view of the heat exchanger 10 according to an embodiment of the present invention.

[0013] The heat exchanger 10 is mounted on a vehicle (not shown). The heat exchanger 10 is, for example, an outdoor heat exchanger in a refrigeration cycle of an air conditioner (not shown). The heat exchanger 10 performs heat exchange between a refrigerant circulating in the refrigeration cycle and outside air. The heat exchanger 10 functions as a condenser when the air conditioner performs a cooling operation, and functions as an evaporator when the air conditioner performs a heating operation.

[0014] Hereinafter, the longitudinal direction of the tank 20 will be referred to as the length direction L, and the width direction of the tank 20 will be referred to as the width direction W. Further, the direction in which the inner wall portion 42 of the inner member 30 described later stands will be referred to as the standing direction 52, and the direction in which the outer wall portion 82 of the outer member 32 described later stands will be referred to as the standing direction 92.

[0015] The heat exchanger 10 includes a pair of tanks 20, a plurality of tubes 22, and a plurality of fins 24. The tanks 20, tubes 22, and fins 24 are formed of a metal such as aluminum and are joined to each other by brazing to form a single unit.

[0016] The tubes 22 are arranged in parallel and stacked with a space therebetween. A flow path through which the refrigerant flows is formed inside the tubes 22. The tubes 22 are arranged such that the heat exchange surface in contact with the fins 24 is horizontal.

[0017] The tanks 20 are arranged to be connected to both end portions in the longitudinal direction of the tubes 22, respectively. The tanks 20 are respectively arranged to be connected to the plurality of tubes 22 from the longitudinal direction. The tanks 20 temporarily store the refrigerant.

[0018] The refrigerant that has circulated through the refrigeration cycle and is used for air conditioning flows into one of the tanks 20. The refrigerant that has flowed into the tank 20 flows through each of the plurality of tubes 22. The refrigerant exchanges heat with the outside air when flowing through the tubes 22.

[0019] The refrigerant that has flowed through the tubes 22 flows into the other tank 20. The refrigerant that has flowed into the tank 20 circulates through the refrigeration cycle again and is used for air conditioning.

[0020] The fins 24 are provided between adjacent tubes 22 and are stacked alternately with the tubes 22. The fins 24 are formed in a wave shape along the longitudinal direction of the tubes 22 and are joined to two adjacent tubes 22. The outside air introduced by the running of the vehicle or an outdoor fan (not shown) passes around the plurality of tubes 22 and fins 24. Therefore, the refrigerant flowing inside the tubes 22 can exchange heat with the outside air through the surfaces of the tubes 22 and the fins 24. In this way, the fins 24 promote the heat exchange between the refrigerant and the outside air.

[0021] Next, with reference to FIGS. 2 to 5, the tank 20 will be described in detail.

[0022] FIG. 2 is a perspective view showing a cross section of a main part of the tank 20 of the heat exchanger 10. FIG. 3 is a perspective view showing a cross section of a main part of the inner member 30. FIG. 4 is a side view showing the holes 90 and the slits 94 in the outer member 32.

[0023] As shown in FIG. 2, the tank 20 is formed in a hollow shape. The tank 20 includes an inner member 30 and an outer member 32. Further, the tank 20 includes a support member 34 disposed inside the inner member 30 and the outer member 32, and a lid body 36 (see FIG. 5) that closes the end of the tank 20.

[0024] (Inner member) As shown in FIGS. 2 and 3, the inner member 30 has a plate-like inner bottom portion 40 extending in the length direction L of the tank 20, and plate-like inner wall portions 42 erected on both side portions of the inner bottom portion 40. Thereby, the inner member 30 is formed in a substantially U-shaped cross section.

[0025] On the inner bottom portion 40, a rectangular first support hole 43 (see FIG. 5), a second support hole 44, a third support hole 46, and a fourth support hole 48 extending in the width direction W of the tank 20 are formed. The support holes 43, 44, 46, and 48 are arranged at equal intervals in the length direction L of the tank 20. An elliptical hole 50 is formed at the central portion of the inner bottom portion 40 in the length direction L. A connection portion (not shown) for refrigerant flow is connected to the elliptical hole 50. The elliptical hole 50 is disposed between the second support hole 44 and the third support hole 46.

[0026] On both inner wall portions 42 of the inner member 30, slit-like first cutout portions 60 (see FIG. 5), second cutout portions 62, third cutout portions 64, and fourth cutout portions 66 extending in the standing direction 52 (see FIG. 3) of each inner wall portion 42 are formed. The cutout portions 60, 62, 64, and 66 are arranged at equal intervals in the length direction L of the tank 20.

[0027] In the first notch 60 and the fourth notch 66, side edges of a plate-like lid 36 (see FIG. 5) formed to a thickness corresponding to each notch 60, 66 are inserted. Also, in the second notch 62 and the third notch 64, side edges of a plate-like support member 34 formed to a thickness corresponding to each notch 62, 64 are inserted.

[0028] Thereby, a part of the inner wall portion 42 of the inner member 30 is constituted by the lid 36 and the support member 34 (see FIGS. 2, 5, and 9).

[0029] A support member 34 attached to the inner member 30 is provided with a protrusion 70. The protrusion 70 protrudes outward from the inner wall portion 42 of the inner member 30. Also, the protrusion 70 protrudes outward at a position closer to the inner bottom portion 40 than the tip of the inner wall portion 42 in the inner member 30.

[0030] Thereby, the inner member 30 has a protrusion 70 that protrudes outward at a position where a second distance K2 from the inner bottom portion 40 is smaller than a first distance K1 from the tip of the inner wall portion 42. At this time, the first distance K1 and the second distance K2 are distances based on the central portion of the protrusion 70 in the standing directions 52, 92 (see FIGS. 2 and 3).

[0031] Note that the support member 34 and the protrusion 70 provided on the support member 34 will be described later.

[0032] (Outer member) As shown in FIG. 2, the outer member 32 has a plate-like outer bottom portion 80 extending in the length direction L of the tank 20 in a state facing the inner bottom portion 40, and outer wall portions 82 erected on both sides of the outer bottom portion 80. Thereby, the outer member 32 is formed in a substantially U-shaped cross section.

[0033] The tip of the outer wall portion 82 is disposed outside the inner wall portion 42 of the inner member 30. Thereby, the outer member 32 covers the outer periphery of the inner member 30 to form a tank 20 having a closed cross-sectional shape.

[0034] As shown in FIGS. 2 and 4, the outer member 32 has a rectangular hole 90 formed in the outer member 32 into which the protrusion 70 of the inner member 30 is inserted, and slits 94 provided on both sides of the outer member 32 in the length direction L of the tank 20 with the hole 90 as a boundary and extending in the standing direction 92 of the outer wall portion 82. As a result, a rectangular side piece portion 96 is formed between adjacent slits 94, 94, and the hole 90 opens to the side piece portion 96.

[0035] The hole 90 formed in the side piece portion 96 may be a through hole penetrating the side piece portion 96 or a bottomed hole with a part of the inner surface of the side piece portion 96 being recessed. The hole 90 of the present embodiment is configured as a through hole penetrating the side piece portion 96.

[0036] The inner wall portion 42 of the inner member 30 is disposed at a position inside the tank 20 rather than the slit 94. The slit 94 is closed from the inside by the inner wall portion 42. In a state where the inner member 30 is assembled to the outer member 32, the inner wall portion 42 of the inner member 30 extends to the outer bottom portion 80 side of the outer member 32 rather than the slit 94. As a result, the inner wall portion 42 has a height that covers and hides the slit 94.

[0037] Each slit 94 is formed so as to reach the tip of the outer wall portion 82 in the standing direction 92 of the outer wall portion 82. As a result, the side piece portion 96 formed between adjacent slits 94, 94 constitutes a fixed end with one end fixed to the outer wall portion 82 and a free end with the other end. And the hole 90 formed in the side piece portion 96 is disposed on the free end side rather than the longitudinal center portion of the side piece portion 96.

[0038] A plurality of tube attachment portions 100 extending in the width direction W are provided at intervals in the length direction L on the outer bottom portion 80 of the outer member 32. Each tube attachment portion 100 has a ridge portion 102 protruding toward the inside of the tank 20 and an insertion hole 104 provided in the ridge portion 102. The end portion of the tube 22 described above is connected to each tube attachment portion 100 in a state of being inserted into the insertion hole 104.

[0039] (Support member) As shown in FIG. 2, the support member 34 has a plate-shaped outer beam portion 110 extending in the width direction W of the tank 20 along the outer bottom portion 80, and a plate-shaped inner beam portion 112 extending in the width direction W along the inner bottom portion 40. The support member 34 has a pair of plate-shaped connecting portions 114 that connect the end of the outer beam portion 110 and the end of the inner beam portion 112. The support member 34 has a rectangular communication hole 116 that communicates the one side and the other side in the length direction L of the tank 20 with the support member 34 as a boundary. Thereby, the support member 34 is formed in a rectangular annular shape having the communication hole 116 in the central portion.

[0040] A rectangular support piece 120 protruding outward is formed at the longitudinal center of the inner beam portion 112 of the support member 34. The support member 34 is positioned in the tank 20 with the support piece 120 inserted into the second support hole 44 or the third support hole 46 of the inner member 30. In a state where the support piece 120 is inserted into the second support hole 44 or the third support hole 46 of the inner member 30, the outer edge portion of the connecting portion 114 of the support member 34 is inserted into each of the cutout portions 62, 64 (see FIG. 3) formed in the inner wall portion 42 of the inner member 30.

[0041] The width dimension of the inner beam portion 112 of the support member 34 is smaller than the width dimension of the outer beam portion 110. Thereby, a step 121 is formed at the outer edge of the connecting portion 114, and the step 121 constitutes a support surface that supports the bottom surfaces of the cutout portions 62, 64 formed in the inner wall portion 42 of the inner member 30.

[0042] The support member 34 is disposed between the inner member 30 and the outer member 32 and is in contact with the inner bottom portion 40 of the inner member 30 and the outer bottom portion 80 of the outer member 32 in a state of being accommodated in the tank 20. Thereby, the support member 34 regulates the insertion amount of the inner member 30 into the outer member 32 when the inner member 30 is inserted into the outer member 32.

[0043] The above-described protrusion 70 protruding outward is integrally formed on the connecting portion 114 of the support member 34. The protrusion 70 is inserted into the hole 90 formed in the outer wall portion 82.

[0044] The protrusion 70 has an end face in the protruding direction formed by an inclined surface 70A, and the height in the protruding direction decreases from the inner beam portion 112 side toward the outer beam portion 110 side. Thereby, the support member 34 is easily inserted into the outer member 32, and detachment from the outer member 32 is suppressed in a state where the protrusion 70 is inserted into the hole 90.

[0045] Also, when the support member 34 is inserted into the outer member 32, the support member 34 guides the side piece portion 96 of the outer member 32 along the inclined surface 70A of the protrusion 70. Thereby, the support member 34 promotes the climbing of the side piece portion 96 onto the protrusion 70 and promotes the elastic deformation of the side piece portion 96.

[0046] The side surface 70B of the protrusion 70 on the inner beam portion 112 side is continuous with a step 121 that constitutes the support surface of the support member 34. The protrusion 70 is suppressed from detaching from the hole 90 in a state where the side surface 70B of the protrusion 70 abuts against the edge of the hole 90.

[0047] (Cover body) As shown in FIGS. 2 and 5, the cover body 36 is formed in a plate shape. The cover body 36 has a narrow region 130 with a small width dimension and a wide region 132 with a large width dimension, and the narrow region 130 constitutes the inner bottom portion 40 side of the inner member 30. A step portion 134 is formed at the edge of the cover body 36 between the wide region 132 and the narrow region 130.

[0048] The edge portion of the wide region 132 is inserted into the respective notch portions 60, 66 formed in the inner wall portion 42 of the inner member 30. The step portion 134 of the cover body 36 supports the bottom surfaces of the respective notch portions 60, 66 formed in the inner wall portion 42 of the inner member 30.

[0049] A protruding piece 136 is formed in the narrow region 130. The cover body 36 is positioned in the tank 20 in a state where the protruding piece 136 is inserted into the first support hole 43 or the fourth support hole 48 of the inner member 30 (see FIG. 2). The cover body 36 closes the end opening of the tank 20 in a state where it is positioned in the tank 20.

[0050] (Method for manufacturing a heat exchanger) Next, with reference to FIGS. 6 to 9, a method for manufacturing the heat exchanger 10 will be described.

[0051] FIG. 6 is an explanatory view showing the manufacturing process of the heat exchanger 10 of the present invention. FIG. 7 is an explanatory view showing the manufacturing process following FIG. 6. FIG. 8 is an explanatory view showing the manufacturing process following FIG. 7. FIG. 9 is an explanatory view showing the manufacturing process following FIG. 8.

[0052] (Support member assembling step) First, with reference to FIG. 6, a support member assembling step 150 of assembling a support member 34 to the inner member 30 will be described.

[0053] In the support member assembling step 150, the operator aligns the support piece 120 of the support member 34 with the second support hole 44 of the inner member 30, inserts the support member 34 into the inner member 30, and assembles the support member 34 to the inner member 30. Further, the operator aligns the support piece 120 of another support member 34 with the third support hole 46 of the inner member 30, inserts the support member 34 into the inner member 30, and assembles the other support member 34 to the inner member 30. Each support member 34 is inserted into the respective notches 62, 64 formed in the inner wall portion 42 of the inner member 30 with the outer edge portion of the connecting portion 114 in a state of being inserted into the inner member 30.

[0054] Further, the operator aligns the protruding piece 136 of the lid body 36 with the first support hole 43 of the inner member 30, inserts the lid body 36 into the inner member 30, and assembles the lid body 36 to the inner member 30 (see FIG. 5). Further, the operator aligns the protruding piece 136 of another lid body 36 with the fourth support hole 48 of the inner member 30, inserts the lid body 36 into the inner member 30, and assembles the lid body 36 to the inner member 30. Each lid body 36 is inserted into the respective notches 60, 66 formed in the inner wall portion 42 of the inner member 30 with the edge portion of the wide region 132 in a state of being inserted into the inner member 30.

[0055] (Support member insertion step) Subsequently, with reference to FIG. 7, a support member insertion step 152 of inserting the support member 34 assembled to the inner member 30 into the outer member 32 will be described.

[0056] In the support member insertion step 152, the operator aligns the opening of the inner member 30 with the opening of the outer member 32, and inserts the support member 34 assembled to the inner member 30 into the outer member 32. At this time, the lid 36 (see FIG. 5) assembled to the inner member 30 is inserted into the outer member 32 in the same manner as the support member 34.

[0057] The support member insertion step 152 can be performed, for example, by a pressing jig that presses the butted inner member 30 and outer member 32 in a direction approaching each other. In the support member insertion step 152, the tip of the inner wall portion 42 of the inner member 30 is arranged to be inserted inside the outer wall portion 82 of the outer member 32.

[0058] (Elastic deformation step) Subsequently, referring to FIG. 8, an elastic deformation step 154 of elastically deforming the side piece portion 96 of the outer member 32 outward when inserting the inner member 30 into the outer member 32 will be described.

[0059] In the elastic deformation step 154, the operator inserts the inner member 30 into the outer member 32 using, for example, a pressing jig, and brings the protrusion 70 of the support member 34 integrated with the inner wall portion 42 of the inner member 30 into contact with the side piece portion 96 of the outer member 32. Then, the side piece portion 96 of the outer member 32 is guided by the inclined surface 70A of the protrusion 70 provided on the inner member 30 and elastically deforms outward.

[0060] (Inner member assembly step) Subsequently, referring to FIG. 9, an inner member assembly step 156 of assembling the inner member 30 to the outer member 32 will be described.

[0061] In the inner member assembly step 156, an operator inserts the inner member 30 into the outer member 32 further, for example, using a pressing jig. Then, the protrusion 70 of the support member 34 integrated with the inner wall portion 42 of the inner member 30 reaches the hole 90 formed in the side piece portion 96 of the outer member 32 and is inserted into the hole 90. As a result, the elastically deformed side piece portion 96 returns to its original position and comes into close contact with the support member 34 integrated with the inner wall portion 42 of the inner member 30.

[0062] In this state, the support member 34 is interposed between the inner member 30 and the outer member 32, and the inner beam portion 112 of the support member 34 contacts the inner bottom portion 40 of the inner member 30. Also, the outer beam portion 110 of the support member 34 contacts the outer bottom portion 80 of the outer member 32. Thereby, the insertion amount of the inner member 30 into the outer member 32 is regulated by the support member 34, and the cross-sectional area of the space formed between the inner member 30 and the outer member 32 is kept constant over the entire length.

[0063] Also, the inner wall portion 42 of the inner member 30 is disposed inside the slit 94 of the outer member 32. Thereby, the slit 94 is closed from the inside by the inner wall portion 42.

[0064] In this state, the inner member 30 is assembled to the outer member 32, and the tank 20 is formed.

[0065] (Tube assembly step) In the tube assembly step, one end of the tube 22 is inserted into the insertion hole 104 of each tube attachment portion 100 provided in the outer bottom portion 80 of the tank 20 in which the inner member 30 is assembled to the outer member 32 (see FIGS. 1 and 2). Thereby, a plurality of tubes 22 are assembled to the outer bottom portion 80 of the outer member 32. Also, the other end of the tube 22 is inserted into the insertion hole 104 of the tube attachment portion 100 of another tank 20.

[0066] Then, the fins 24 are set between the respective tubes 22 of the tank 20. Thereby, the heat exchanger 10 is formed.

[0067] (Soldering Process) In the soldering process, the inner member 30, the outer member 32, the support member 34, the tube 22, and the fin 24 are soldered to each other.

[0068] As a method of soldering, for example, after assembling the heat exchanger 10 using the inner member 30, the outer member 32, the support member 34, the tube 22, and the fin 24 to which solder is pre-applied, the heat exchanger 10 is heated in a furnace to melt the solder, thereby soldering each member.

[0069] Thereby, the heat exchanger 10 is formed by the integrated members. Also, in the heat exchanger 10, the gaps between the members are filled with solder.

[0070] (Function and Effect) According to the above embodiments, the following effects are achieved.

[0071] The heat exchanger 10 of the present embodiment includes a hollow tank 20. The heat exchanger 10 includes an inner member 30 that has an inner bottom portion 40 extending in the length direction L of the tank 20 and inner wall portions 42 erected on both sides of the inner bottom portion 40, and is formed in a substantially U-shaped cross section. The heat exchanger 10 includes an outer member 32 that has an outer bottom portion 80 extending in the length direction L in a state facing the inner bottom portion 40 and outer wall portions 82 erected on both sides of the outer bottom portion 80 and disposed outside the inner wall portions 42, and is formed in a substantially U-shaped cross section to cover the outer periphery of the inner member 30 and form the tank 20. The inner member 30 has a protrusion 70 that protrudes outward at a position where a second distance K2 from the inner bottom portion 40 is smaller than a first distance K1 from the tip of the inner wall portion 42. The outer member 32 has a hole 90 formed in the outer wall portion 82 into which the protrusion 70 is inserted, and slits 94 provided on both sides in the length direction L of the hole 90 and extending in the erected direction 92 of the outer wall portion 82. The inner wall portion 42 is formed at a height that covers the slits 94.

[0072] In this configuration, on both sides of the hole 90 in the outer member 32 into which the protrusion 70 of the inner member 30 is inserted, slits 94 extending in the standing direction 92 of the outer wall portion 82 are formed, and the hole 90 is formed in the side piece portion 96 sandwiched between the two slits 94. Therefore, when inserting the protrusion 70 of the inner member 30 into the hole 90 of the outer member 32, the side piece portion 96 formed between the two slits 94, 94 elastically deforms, and the protrusion 70 is inserted into the hole 90. And in the state where the protrusion 70 is inserted into the hole 90, the deformed side piece portion 96 returns to its original position.

[0073] Therefore, compared with the case of plastically deforming the claw portion of the tube plate to connect the tube plate and the tank plate to form a tank, the heat exchanger 10 can suppress changes in the gap that may occur between the outer member 32 and the inner member 30. Thereby, the heat exchanger 10 can stably perform brazing of the inner member 30 and the outer member 32, and the brazing work can be facilitated.

[0074] In the heat exchanger 10 of the present embodiment, the slit 94 is formed so as to reach the tip of the outer wall portion 82 in the standing direction 92.

[0075] In this configuration, in the side piece portion 96 formed between the slits 94, 94, the displacement amount of the tip portion of the side piece portion 96 with which the protrusion 70 slidably contacts when inserting the inner member 30 into the outer member 32 can be increased.

[0076] Thereby, the heat exchanger 10 can easily assemble the inner member 30 to the outer member 32.

[0077] In the heat exchanger 10 of the present embodiment, the inner member 30 has slit-shaped cutouts (62, 64) formed in the standing direction 52 on the inner wall portion 42. The protrusion 70 is provided on the support member 34 formed to have a thickness corresponding to the cutouts (62, 64) and inserted into the cutouts (62, 64).

[0078] In this configuration, the protrusion 70 of the inner member 30 is provided on the support member 34 that is inserted into the notches (62, 64) of the inner wall portion 42. Therefore, the heat exchanger 10 can improve the dimensional accuracy of the protrusion 70 as compared with the case where the protrusion 70 is provided on the inner wall portion 42 of the inner member 30.

[0079] In the heat exchanger 10 of the present embodiment, the support member 34 is in contact with the inner bottom portion 40 of the inner member 30 and the outer bottom portion 80 of the outer member 32 in a state of being housed in the tank 20.

[0080] In this configuration, the support member 34 disposed between the inner member 30 and the outer member 32 is in contact with the inner bottom portion 40 of the inner member 30 and the outer bottom portion 80 of the outer member 32.

[0081] Thereby, since the insertion amount of the inner member 30 into the outer member 32 is regulated by the support member 34, it is possible to maintain the cross section of the space formed between the inner member 30 and the outer member 32 in a predetermined shape.

[0082] In the heat exchanger 10 of the present embodiment, the support member 34 has a communication hole 116 that communicates one side and the other side in the length direction L with the support member 34 as a boundary.

[0083] In this configuration, the support member 34 has the communication hole 116. Therefore, the heat exchanger 10 can dispose the support member 34 at the center of the tank 20 through which the refrigerant flows.

[0084] Thereby, by disposing the support member 34 that regulates the insertion amount of the inner member 30 into the outer member 32 at the center of the tank 20, it is possible to improve the dimensional accuracy at the center of the tank 20.

[0085] The manufacturing method of the heat exchanger 10 of the present embodiment is the manufacturing method of the heat exchanger 10 described above. The manufacturing method of the heat exchanger 10 includes a step (150) of assembling the support member 34 to the inner member 30. The manufacturing method of the heat exchanger 10 inserts (152) the support member 34 assembled to the inner member 30 into the outer member 32, elastically deforms (154) the side piece portion 96 between the slits 94, 94 with the protrusion 70 of the support member 34, and includes a step (156) of inserting the protrusion 70 into the hole 90. The manufacturing method of the heat exchanger 10 includes a step of assembling a plurality of tubes 22 to the outer bottom portion 80 and a step of brazing the inner member 30, the outer member 32, the support member 34, and the tubes 22.

[0086] In this configuration, similar to the heat exchanger 10 described above, it is possible to suppress changes in the gap that may occur between the outer member 32 and the inner member 30, and it becomes possible to stably braze the inner member 30 and the outer member 32.

[0087] Further, the protrusion 70 of the support member 34 is inserted into the hole 90 of the outer member 32. Therefore, it becomes possible to suppress the detachment of the support member 34 from the outer member 32 in the manufactured tank 20.

[0088] As described above, the embodiments of the present invention have been described. However, the above embodiments merely show a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments.

Explanation of reference numerals

[0089] 10 Heat exchanger 20 Tank 22 Tube 30 Inner member 32 Outer member 34 Support member 40 Inner bottom 42 Inner wall portion 52 Standing direction 62 Second notch 66 Fourth notch 70 Protrusion 80 Outer bottom 82 Outer wall part 90 Hole 92 Upright direction 94 Slit 96 Side piece part 116 Communication hole 150 Support member assembly process 152 Support member insertion process 154 Elastic deformation process 156 Inner member assembly process K1 First distance K2 Second distance L Length direction W Width direction

Claims

1. A heat exchanger comprising a hollow tank, an inner member having an inner bottom extending in the longitudinal direction of the tank and inner wall portions erected on both sides of the inner bottom, and formed in a substantially U-shaped cross section, an outer member having an outer bottom extending in the longitudinal direction facing the inner bottom and outer wall portions erected on both sides of the outer bottom and disposed outside the inner wall portions, and formed in a substantially U-shaped cross section to cover the outer periphery of the inner member and form the tank, comprising, the inner member has a protrusion protruding outward at a position where the distance from the inner bottom is smaller than the distance from the tip of the inner wall portion, the outer member, a hole formed in the outer wall portion into which the protrusion is inserted, and slits provided on both sides of the hole in the longitudinal direction and extending in the erected direction of the outer wall portion, having, the inner wall portion is formed at a height to cover the slit, heat exchanger.

2. The heat exchanger according to claim 1, the slit is formed so as to reach the tip of the outer wall portion in the erected direction, heat exchanger.

3. The heat exchanger according to claim 1, the inner member has a slit-shaped notch formed in the inner wall portion in the erected direction, the protrusion is formed to a thickness corresponding to the notch and provided on a support member inserted into the notch, heat exchanger.

4. The heat exchanger according to claim 3, the support member is in contact with the inner bottom of the inner member and the outer bottom of the outer member in a state of being accommodated in the tank, heat exchanger.

5. The heat exchanger according to claim 4, wherein the support member has a communication hole that communicates one side and the other side in the length direction with the support member as a boundary. Heat exchanger.

6. A method for manufacturing a heat exchanger according to any one of claims 3 to 5, a step of assembling the support member to the inner member; a step of inserting the support member assembled to the inner member into the outer member, elastically deforming a side piece portion between the slits with the protrusion of the support member, and inserting the protrusion into the hole; a step of assembling a plurality of tubes to the outer bottom; a step of brazing the inner member, the outer member, the support member, and the tube; comprising A method for manufacturing a heat exchanger.

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