WO2016129530A1

WO2016129530A1 - Heat exchanger, heat exchanger assembly device, and heat exchanger assembly method

Info

Publication number: WO2016129530A1
Application number: PCT/JP2016/053555
Authority: WO
Inventors: 弘規加藤; 靖行篠原
Original assignee: カルソニックカンセイ株式会社
Priority date: 2015-02-12
Filing date: 2016-02-05
Publication date: 2016-08-18

Abstract

Provided are a heat exchanger, a heat exchanger assembly device, and a heat exchanger assembly method in which a tank is accurately mounted onto stacked tubes. The heat exchanger (10), in which a tank (13, 14) is connected to the open end part (11d) of the stacked tubes (11), has a pressing part (11g) in the vicinity of the open end part of each of the tubes. The pressing part (11g) holds the tube when the tank is connected.

Description

Heat exchanger, assembling apparatus for heat exchanger, and method for assembling heat exchanger

The present invention relates to a heat exchanger, a heat exchanger assembly apparatus, and a heat exchanger assembly method.

A heat exchanger used for a radiator or the like of a car includes a plurality of tubes and fins to be stacked, and a pair of tanks connected to the open end of each tube. When assembling this kind of heat exchanger automatically, it is necessary to hold each tube to be stacked in place.

JP 02-035630 U discloses a heat exchanger core assembling apparatus including compression claws for alternately arranging a plurality of tubes and fins on a set plate and compressing the tubes and fins in the stacking direction. There is.

In JP 61-025734 A, a plurality of tubes and fins are alternately stacked and arranged on a table, and each tube and fins are compressed in the stacking direction with the upper and lower guide plates sandwiched between the upper and lower guide plates. A plate assembling device for a heat exchanger core is disclosed, which inserts the open end of each tube into the hole of the side plate (tank).

However, in the inventions described in JP 02-035630 U and JP 61-025734 A, positional deviations occur in the tubes stacked on a table or the like, so the opening end of each tube is accurately inserted into the hole of the tank. There was a problem that it was difficult.

An object of the present invention is to provide a heat exchanger, an assembling apparatus for the heat exchanger, and a method for assembling the heat exchanger, in which assembling of the tank to each of the stacked tubes is accurately performed.

According to an aspect of the present invention, there is provided a heat exchanger having a tank connected to the open ends of the plurality of stacked tubes, wherein the tank is connected near the open end of each tube. A heat exchanger is provided having a pressing portion for holding the tube.

According to another aspect of the present invention, there is provided an assembling apparatus of a heat exchanger for connecting a tank to the open ends of a plurality of stacked tubes, wherein the respective tubes are stacked on the table and the table. A lamination direction compression part for compressing a plurality of tubes in the lamination direction, and a thickness direction compression part for compressing the plurality of tubes in the thickness direction orthogonal to the table, the thickness direction compression part being a lamination direction compression part And a holding unit for pressing the vicinity of the open end of the plurality of tubes compressed in the stacking direction with the table, and the holding unit holds the plurality of tubes when connecting the tank to the plurality of tubes An assembly device for a heat exchanger is provided.

According to another aspect of the present invention, there is provided a method of assembling a heat exchanger in which a tank is connected to the open end of a plurality of stacked tubes, the stacking step of stacking the plurality of tubes, and stacking the plurality of tubes. A plurality of tubes are held in a state in which a plurality of tubes are held by pressing the main compression step of compressing in the direction and holding portions for holding the tubes in the vicinity of the open end of the plurality of tubes compressed in the stacking direction. And an assembling step of connecting the tank to the heat exchanger.

According to the above aspect, when the tank is connected to the stacked tubes, the pressing portion in the vicinity of the open end of each tube is pressed, thereby suppressing occurrence of positional deviation in each tube. . For this reason, assembling the tank to each of the stacked tubes is accurately performed.

FIG. 1 is a front view showing a schematic configuration of a heat exchanger core according to an embodiment of the present invention. FIG. 2A is an explanatory view showing a process of assembling the heat exchanger core. FIG. 2B is an explanatory view showing a process of assembling the heat exchanger core. FIG. 2C is an explanatory view showing a process of assembling the heat exchanger core. FIG. 2D is an explanatory view showing a process of assembling the heat exchanger core. FIG. 3A is a configuration diagram showing an operation of the assembling apparatus in the stacking process. FIG. 3B is a block diagram showing the operation of the assembling apparatus in the main compression process. FIG. 3C is a configuration diagram showing an operation of the assembling device in the assembling process. FIG. 4A is a configuration diagram showing an operation of the assembling apparatus in the stacking process. FIG. 4B is a configuration diagram showing an operation of the assembling device in the main compression process. FIG. 4C is a configuration diagram showing an operation of the assembly apparatus in the assembly process. FIG. 5A is a cross-sectional view of a tube showing the operation of the assembling apparatus in the stacking process. FIG. 5B is a cross-sectional view of the tube showing the operation of the assembling apparatus in the present compression process. FIG. 5C is a cross-sectional view of the tube showing the operation of the assembling apparatus in the assembling process. FIG. 6 is a front view showing a modified example of the heat exchanger core. FIG. 7 is a configuration diagram showing the operation of the assembling apparatus according to the comparative example.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a front view showing a schematic configuration of a heat exchanger 10 according to an embodiment of the present invention.

The heat exchanger 10 performs heat exchange between the medium flowing inside and the outside air or the like. The heat exchanger 10 is used for a radiator through which a coolant of an internal combustion engine flows as a medium. The heat exchanger 10 is not limited to this, and may be used as a charge air cooler through which intake air flows as a medium, an air conditioner through which refrigerant gas flows as a medium, a condenser of a cooling device, or the like.

The heat exchanger 10 is arranged so as to line up at both ends of a plurality of tubes 11 in which the medium flows inside, corrugated plate-like fins 12 alternately arranged with each tube 11, and each tube 11 and each fin 12 laminated body Left and right reinforcements 17 and upper and

lower tanks

13 and 14 to which the open end 11 d of each tube 11 is connected.

The flat cylindrical tube 11 is formed, for example, by bending a metal plate such as aluminum into a cylindrical shape. The tube 11 is not limited to this, and may be formed by extruding a molten metal material in a cylindrical shape.

The

tanks

13 and 14 include

tank plates

23 and 24 to which the open end 11 d of each tube 11 is connected, and dome-

shaped tank bodies

25 and 26 assembled to the

tank plates

23 and 24, respectively. The

tank plates

23, 24 have

tube insertion holes

23a, 24a (see FIG. 2D) into which the open end 11d of each tube 11 is inserted. The

tank plates

23 and 24 are formed of, for example, a metal material such as aluminum. The

tank bodies

25 and 26 are formed of, for example, a resin material.

At the time of manufacture of the heat exchanger 10, the tube 11, the fins 12, the reinforcements 17, and the

tank plates

23, 24 are assembled by using an assembling device 50 which will be described later. The assembled members constitute the heat exchange core 9 by being joined by brazing. The heat exchanger 10 is completed by assembling the

tank bodies

25 and 26 to the heat exchange core 9.

At the time of operation of the heat exchanger 10, the medium is supplied from the medium inlet 15 of the tank body 25 to the tank 13, and after flowing from the tank 13 to each tube 11, is discharged from the medium outlet 16 of the tank body 26 through the tank 14. Ru. Thus, the medium circulating through the heat exchanger 10 exchanges heat with air through the fins 12 in the process of flowing through the tubes 11.

FIGS. 2A to 2D illustrate the process of assembling the heat exchange core 9. Hereinafter, the process of assembling the heat exchange core 9 will be described.

First, a plurality of tubes 11 and fins 12 are alternately stacked (see FIG. 2A). Subsequently, the tubes 11 and the fins 12 are compressed in the stacking direction (see FIG. 2B) using the assembly apparatus 50 (see FIGS. 3A to 3C and 4A to 4C). At this time, the fins 12 are in close contact with the adjacent tubes 11. In addition, below, what the tube 11 of predetermined number and the fin 12 laminated | stacked alternately is called "the laminated body 18". Further, the direction in which the tubes 11 and the fins 12 are arranged is referred to as a “stacking direction”.

The stacked body 18 composed of the tubes 11 and the fins 12 is compressed by using an assembling device 50 described later until the distance between the tubes 11 adjacent in the stacking direction becomes a predetermined distance. The predetermined distance is a distance between the

tube insertion holes

23a and 24a of the tank plates 23 and 24 (see FIG. 2C). In addition, below, the space | interval of the adjacent tubes 11 is called "tube pitch."

The open end 11d of each tube 11 is press-fit into each

tube insertion hole

23a, 24a of the

tank plates

23, 24 in a state where the tube pitch of the laminated body 18 is compressed to a predetermined interval (see FIG. 2D).

Thereafter, the members are brazed by melting the clad layer applied to the surfaces of the tube 11, the fins 12 and the

tank plates

23, 24 by heat treatment. Thereby, the tube 11, the fins 12, the reinforcements 17, and the

tank plates

23, 24 are integrated to form the heat exchange core 9.

3A to 3C are schematic configuration diagrams showing the assembly apparatus 50. FIGS. 4A to 4C are schematic configuration views showing the assembling apparatus 50 as viewed in the direction of arrow J in FIG. 3A. Hereinafter, the configuration of the assembling device 50 will be described.

The assembling apparatus 50 includes a table 51, a stacking direction compression unit 55, a thickness direction compression unit 60, and a tank assembly unit (not shown).

The table 51 has a planar portion on which the laminate 18 including the tube 11 and the fins 12 which are parts of the heat exchanger 10 is placed.

The stacking direction compression unit 55 is a mechanism that compresses the stacked body 18 placed on the table 51 in the stacking direction. The stacking direction compression unit 55 includes a fixed portion 56 fixed to the table 51, a movable portion 57 supported movably in the stacking direction with respect to the table 51, and an actuator (not shown) for moving the movable portion 57. Equipped with

The thickness direction compression unit 60 is a mechanism that compresses the stacked body 18 in the thickness direction orthogonal to the table 51. The thickness direction compression unit 60 includes a leveling plate 61 moved in the thickness direction by the drive mechanism 62 and a pair of hold units 63 moved in the thickness direction by the drive mechanism 64. In addition, below, the direction orthogonal to the surface in which the laminated body 18 of the table 51 is mounted is called "thickness direction."

The drive mechanism 62 of the leveling plate 61 moves the leveling plate 61 by raising and lowering the guide rod 69 (see FIGS. 4A to 4C) and the support base 65 supporting the leveling plate 61 so as to be able to move up and down. And an actuator 66. The actuator 66 is constituted by, for example, a hydraulic cylinder.

The leveling plate 61 extends in parallel with the table 51 and has a planar portion for pressing each of the tubes 11 placed on the table 51.

The drive mechanism 64 of the holding unit 63 has a pair of guide units 67 supporting the holding units 63 so as to be able to move up and down with respect to the support base 65 and a pair of moving the holding units 63 by moving the guide units 67 up and down. And an actuator 68. Each actuator 68 is constituted by, for example, a hydraulic cylinder.

The holding part 63 is a convex part which protrudes from each guide part 67 and presses each tube 11. Each tube 11 has a pressing portion 11g in the vicinity of the opening end 11d, to which the holding portion 63 is pressed. As shown in FIG. 5C described later, when the holding portion 63 is pressed by the tube 11, the recess 11 a (pressing mark) recessed in the surface 11 b of the tube 11 is formed in the pressing portion 11 g. .

The respective holding parts 63 are arranged across the table 51 in the longitudinal direction of the tube 11 and extend in parallel with both ends of the table 51. Each holding unit 63 is disposed to face a predetermined position of each tube 11 placed on the table 51. As shown in FIG. 1, the pressing portion 11 g is provided at a predetermined distance L from the

tank plates

23 and 24 of the tube 11.

Although the hold portion 63 is integrally formed with the guide portion 67, the present invention is not limited to this. The hold portion 63 may be formed separately from the guide portion 67.

The leveling plate 61 and the respective holding portions 63 are formed of a metal material such as iron, for example, whose hardness is higher than that of the tube 11. The area of the leveling plate 61 in contact with each tube 11 is set to be larger than the area of each holding portion 63 in contact with each tube 11. Thereby, it is comprised so that a plastic deformation may not arise in the site | part of the tube 11 by which the leveling board 61 is pressed.

Next, the operation of the assembling apparatus 50 will be described with reference to FIGS. 3A to 3C, 4A to 4C, and 5A to 5C. 5C corresponds to the cross section of the tube 11 along the VC-VC line in FIG.

First, in the assembling apparatus 50, a stacking step of stacking the stacked body 18 at a predetermined position on the table 51 is performed (see FIGS. 3A, 4A, and 5A).

In the laminating step, the laminated body 18 in which a predetermined number of tubes 11 and fins 12 are arranged is placed on the table 51, and the support table 65 is directed to the table 51 by the operation of the drive mechanism 62 of the thickness direction compression unit 60. The stack 18 is pressed in the thickness direction by the driving force B by the leveling plate 61 and the holding portions 63 (see FIG. 3A). Each hold portion 63 is held at a position extending on the same plane (horizontal surface) as the leveling plate 61, and presses the stack 18 together with the leveling plate 61. At this time, the pressing portions 11g pressed by the respective holding portions 63 of the tube 11 do not plastically deform (see FIG. 5A). In the laminating step, the holding portion 63 may be moved upward away from the laminated body 18 and the laminated body 18 may be pressed only by the leveling plate 61.

Then, in the stacking step, the movable portion 57 is moved toward the fixed portion 56 by the operation of the stacking direction compression portion 55, and the stack 18 is compressed in the stacking direction by the driving force A (see FIG. 4A). The compression by the stacking direction compression unit 55 in the stacking process is performed until the tube pitch is, for example, about 90% closer to the predetermined interval described above.

The driving force B by which the driving mechanism 62 presses the stacked body 18 on the table 51 is set so that the tube 11 and the fin 12 pressed by the movable portion 57 of the stacking direction compression portion 55 move smoothly toward the fixed portion 56 Ru. Instead of setting the driving force B of the driving mechanism 62, the driving force B of the driving mechanism 62 may be controlled based on the stroke amount for moving the leveling plate 61 relative to the table 51. . In that case, for example, the stroke amount is set such that the distance between the table 51 and the leveling plate 61 is equal to the thickness of the stack 18.

Thus, in the stacking step, the stacked body 18 is placed in a predetermined position on the table 51 without being lifted from the table 51 by being compressed in both the thickness direction and the stacking direction.

Next, in the assembling apparatus 50, a main compression step of compressing the stack 18 until the tube pitch reaches the above-described predetermined interval is performed (see FIGS. 3B, 4B, and 5B).

FIG. 7 is a block diagram showing the operation of the assembling apparatus 150 as a comparative example. The thickness direction compression unit 160 of the assembling apparatus 150 does not include the hold unit, and compresses the stacked body 18 in the thickness direction with only the leveling plate 161. When the stacked body 18 is compressed in the stacking direction by the stacking direction compressed portion 155, the thickness direction compressed portion 160 receives the frictional force M from the stacked body 18. When the frictional force M is large, the guide rod 169 supporting the leveling plate 161 is bent so as to incline at an angle θ by the frictional force M, and the leveling plate 161 is displaced by the distance N in the stacking direction. Together with the table 51. Thus, when the posture of the leveling plate 161 changes, there is a possibility that positional deviation may occur in which some of the tubes 11 rise from the table 51.

On the other hand, in the main compression process of the present embodiment, the support base 65 is lowered toward the table 51 by the operation of the drive mechanism 62 of the thickness direction compression unit 60, and the stack 18 is driven by the leveling plate 61. It is pressed in the thickness direction by force E (see FIG. 3B). On the other hand, each hold unit 63 moves upward away from the stack 18 as indicated by the arrow F.

Then, in the main compression step, the stack 18 is compressed in the stacking direction by the driving force D by the operation of the stacking direction compression unit 55, and the tube pitch is set to the above-mentioned predetermined interval (see FIG. 4B). The driving force D in the main compression process is set larger than the driving force A in the stacking process.

The driving force E by which the driving mechanism 62 presses the stack 18 onto the table 51 is larger than the driving force B in the stacking step, and the tube 11 and the fin 12 pressed by the movable portion 57 of the stacking direction compression portion 55 are fixed portions It is set to move smoothly toward 56. Instead of setting the driving force E of the driving mechanism 62, the driving force E of the driving mechanism 62 may be controlled based on the stroke amount for moving the leveling plate 61 relative to the table 51. . In that case, for example, the distance between the table 51 and the leveling plate 61 is set to be slightly smaller than the thickness of the laminate 18.

In the main compression process, each hold portion 63 is separated from the stack 18 (see FIG. 5B), and the pressure with which the hold portion 63 presses the stack 18 is made zero. For this reason, when the stacking direction compression unit 55 compresses the stacked body 18 in the stacking direction, the frictional force C received from the stacked body 18 by the drive mechanism 62 of the thickness direction compressed portion 60 is suppressed small. As a result, bending of the guide rod 69 and the like supporting the leveling plate 61 is suppressed, and the posture of the leveling plate 61 facing the table 51 in parallel is maintained. In this way, since the posture of the leveling plate 61 is maintained in the main compression process, it is possible to prevent the occurrence of positional deviation in which some of the tubes 11 are lifted from the table 51.

Next, an assembling process of assembling the

tank plates

23, 24 to the stack 18 held on the table 51 is performed (see FIGS. 3C, 4C, and 5C).

In the assembling process, the laminated body 18 is compressed in the laminating direction by the driving force G by the operation of the laminating direction compression unit 55 (see FIG. 4C), and the laminated plate 18 is driven by the leveling plate 61 by the operation of the actuator 66 of the driving mechanism 62. The force H is pressed in the thickness direction. In this state, the laminated body 18 is pressed in the thickness direction by the driving force I by the hold portion 63 by the operation of the actuator 68 of the driving mechanism 64 (see FIG. 3C).

As shown in FIG. 5C, the concave portion 11a is formed by pressing the driving force I by the holding portion 63 on the surface 11b of the pressing portion 11g of the tube 11 curved in an arc shape. The recess 11 a has a pair of step portions 11 c facing each other. Each step 11 c extends in a direction (lateral direction) orthogonal to the longitudinal direction of the tube 11.

The driving force I for moving the holding portion 63 by the driving mechanism 64 causes the tube 11 pressed by the holding portion 63 to be plastically deformed, and the recessed portion 11 a recessed by a predetermined depth on the surface 11 b of the pressing portion 11 g of the tube 11 Set to be formed. The load with which the holding part 63 presses each tube 11 is set larger than the load with which the leveling board 161 presses the laminated body 18 in the comparative example shown in FIG. 7. Further, instead of setting the drive force I of the drive mechanism 64, the drive force I of the drive mechanism 64 may be controlled based on the stroke amount for moving the hold unit 63 relative to the table 51. In that case, for example, the stroke amount is set such that the distance between the table 51 and the hold portion 63 is smaller than the thickness of the tube 11 by a predetermined amount. By setting the stroke amount in this manner, a recess 11 a of a predetermined depth is formed on the surface of the pressing portion 11 g of the tube 11. The depth of the concave portion 11 a can be changed by adjusting the load or the stroke amount by which the holding portion 63 presses each tube 11. Further, as described later, the pressing portion 11g of the tube 11 can be configured such that the concave portion 11a is not formed because the surface 11b of the tube 11 is not plastically deformed.

Thus, in a state in which the stack 18 is held on the table 51, the tank assembling portion (not shown) is operated to assemble the

tank plates

23, 24 into the stack 18. At this time, movement of the stacked body 18 in the stacking direction is restricted by being compressed by the stacking direction compression unit 55. And since the hold part 63 is pressed by the recessed part 11a, it is controlled that each tube 11 moves in the thickness direction and the longitudinal direction of the tube 11. Thus, since each tube 11 is held at a predetermined position on the table 51, press-fitting the open end 11d of each tube 11 into the

tube insertion holes

23a and 24a of the

tank plates

23 and 24 is performed with high accuracy.

Thereafter, a clad layer previously applied to the surfaces of the tube 11, the fins 12 and the

tank plates

23 and 24 is melted by heat treatment, and the heat exchange core 9 is formed by brazing the respective portions to each other. . Thereafter, the

tank bodies

25 and 26 are coupled to the

tank plates

23 and 24, and the heat exchanger 10 is completed.

Next, the effects of the present embodiment will be described.

In the present embodiment, each tube 11 is provided with the heat exchanger 10 having the pressing portion 11 g for holding the tube 11 when the

tanks

13 and 14 are connected in the vicinity of the open end 11 d. .

Further, in the present embodiment, the table 51 on which the tubes 11 are stacked, the stacking direction compression unit 55 that compresses the tubes 11 stacked on the table 51 in the stacking direction, and the thickness of the tubes 11 orthogonal to the table 51 The thickness direction compression unit 60 includes the table 51 and the vicinity of the open end 11 d of each tube 11 compressed in the stacking direction by the stacking direction compression unit 55. The holding unit 63 is provided with an assembly device 50 that holds the plurality of tubes 11 when connecting the

tanks

13 and 14 to each tube 11.

Further, in the present embodiment, the stacking step of stacking the tubes 11, the main compression step of compressing the tubes 11 in the stacking direction, and the tubes in the vicinity of the open end 11d of each tube 11 compressed in the stacking direction. And an assembling step of connecting the

tanks

13 and 14 to the respective tubes 11 in a state of holding the respective tubes 11 by pressing the holding portions 63 for holding the tubes 11.

According to the above configuration, when the

tanks

13 and 14 are connected to the stacked tubes 11, the tubes 11 are stacked by pressing the vicinity of the open end 11 d of each tube 11 by the holding unit 63. It is possible to suppress the occurrence of positional deviation. For this reason, assembling the

tanks

13 and 14 to the stacked tubes 11 is performed with high accuracy. This prevents the tube 11 and the

tube insertion holes

23a and 24a of the

tanks

13 and 14 from being damaged. As a result, in the heat exchanger 10, brazing for joining the tube 11 and the

tube insertion holes

23a and 24a is performed without a gap, and the yield at the time of assembly can be improved.

In the present embodiment, the heat exchanger 10 is provided in which the recess 11 a is formed in the surface 11 b of the tube 11 as a trace of pressing on the pressing portion 11 g.

According to the above-described configuration, when the

tanks

13 and 14 are connected, the hold portion 63 presses the surface 11b of each tube 11 until it plastically deforms and fits in the recessed recess 11a. The occurrence of positional deviation in each tube 11 is suppressed.

In the present embodiment, the heat exchanger 10 is provided in which the pressing portion 11 g is formed at a predetermined distance L from the

tanks

13 and 14 in the longitudinal direction of the tube 11.

According to the above configuration, when the

tanks

13 and 14 are assembled to the tube 11, the holding portion 63 pressed against the pressing portion 11 g is prevented from interfering with the

tanks

13 and 14. Thus, the

tanks

13 and 14 can be smoothly assembled to the tube 11 in a state in which the holding portion 63 is pressed against the recess 11 a.

In the present embodiment, the thickness direction compression unit 60 includes a leveling plate 61 for pressing the tubes 11 with the table 11 side by side with the holding unit 63, and the leveling plate 61 includes the holding units 63 for each tube. An assembly device 50 for the heat exchanger 10 is provided which compresses each tube 11 in the thickness direction away from 51.

According to the above configuration, when the stacking direction compression unit 55 compresses the stack 18 in the stacking direction, the leveling plate 61 is in sliding contact with the stack 18 and the frictional force received by the leveling plate 61 from the stack 18 is small. By being suppressed, the posture of the leveling plate 61 is maintained. In this way, since the posture of the leveling plate 61 is maintained in the main compression process, it is possible to prevent the occurrence of positional deviation in which some of the tubes 11 are lifted from the table 51.

Next, a modification of the heat exchanger 10 shown in FIG. 6 will be described.

In the pressing portion 11 g, a pressing mark portion 11 f is formed as a pressing mark formed on the surface of each tube 11.

In the assembling process, by appropriately setting the load or the stroke amount for pressing the holding portion 63 to each tube 51, the surface of each tube 11 is pressed by the holding portion 63 (see FIGS. 3C and 4C). Even if it bends, it has composition which returns to original surface shape, without plastic deformation. As a result, the pressing portion 11 g of each tube 11 is formed with a pressing mark portion 11 f whose surface roughness is partially changed without forming a recess by pressing the holding portion 63.

In the assembling step, when the

tanks

13 and 14 are connected, the holding portion 63 presses the surface of each tube 11 so that the positional deviation of the tubes 11 stacked on the table 51 can be suppressed. For this reason, assembling the

tanks

13 and 14 to the stacked tubes 11 is performed with high accuracy.

In addition, not only the configuration described above, but by appropriately setting the load or the stroke amount by which the holding portion 63 presses each tube 11 in the assembling step, the pressing portion 11 g is pressed against the surface of each tube 11 It may be configured so as not to leave a trace.

As mentioned above, although embodiment of this invention was described, the said embodiment is only what showed one of the application examples of this invention, and the meaning which limits the technical scope of this invention to the specific structure of the said embodiment is not.

In the upper air embodiment, the leveling plate 61 and the holding unit 63 are configured to press the stacked body 18 by vertically moving the table 51. However, the present invention is not limited thereto. Thus, the stack 18 may be pressed from an oblique direction.

Moreover, in the said embodiment, although the tube 18 and the fin 12 were comprised laminated | stacked in the laminated body 18, it is not restricted to this, You may make it the structure which does not have a fin but is laminated | stacked only.

This application claims priority based on Japanese Patent Application No. 2015-025527 filed on Feb. 12, 2015 in the Japanese Patent Office, and Japanese Patent Application No. 2016-008445 filed on January 20, 2016 in the Japanese Patent Office. And the entire content of this application is incorporated herein by reference.

Claims

A heat exchanger having a tank connected to the open ends of a plurality of stacked tubes, the heat exchanger comprising:
A heat exchanger having a pressing portion near the open end of each of the tubes for holding the tubes when the tank is connected.
The heat exchanger according to claim 1, wherein
The heat exchanger having a pressing mark formed on a surface of the tube.
The heat exchanger according to claim 2, wherein
The heat exchanger according to claim 1, wherein the pressing mark is a recess recessed in the surface of the tube.
The heat exchanger according to any one of claims 1 to 3, wherein
The heat exchanger according to claim 1, wherein the pressing portion is formed at a position away from the tank in the longitudinal direction of the tube.
What is claimed is: 1. A heat exchanger assembly apparatus comprising: a tank connected to the open end of a plurality of stacked tubes, the heat exchanger comprising:
A table on which each of the tubes is stacked;
A stacking direction compression unit configured to compress the plurality of tubes stacked on the table in the stacking direction;
A thickness direction compression section for compressing the plurality of tubes in a thickness direction orthogonal to the table;
The thickness direction compression unit includes a hold unit that presses the vicinity of the open end of the plurality of tubes compressed in the stacking direction by the stacking direction compression unit with the table.
The said holding | maintenance part is an assembly apparatus of the heat exchanger which hold | maintains these tubes, when connecting the said tank to these tubes.
The heat exchanger assembly apparatus according to claim 5, wherein
The assembly apparatus of a heat exchanger, wherein the thickness direction compression unit presses the surfaces of the plurality of tubes by the hold unit and forms marks.
The heat exchanger assembly apparatus according to claim 6, wherein
The thickness direction compression unit further includes a leveling plate for pressing the plurality of tubes between the table and the table in parallel with the hold unit,
The heat exchanger assembling apparatus according to claim 1, wherein the leveling plate compresses the plurality of tubes in a thickness direction in a state where the holding portion is separated from the plurality of tubes.
What is claimed is: 1. A method of assembling a heat exchanger, comprising: connecting a tank to open ends of a plurality of stacked tubes, the method comprising:
Stacking the plurality of tubes;
A main compression step of compressing the plurality of tubes in a stacking direction;
The tank is connected to the plurality of tubes while holding the plurality of tubes by pressing the holding portion for holding the tubes in the vicinity of the open end of the plurality of tubes compressed in the stacking direction And an assembling process for assembling the heat exchanger.
A method of assembling a heat exchanger according to claim 8, wherein
A method of assembling a heat exchanger, wherein in the assembling step, the hold portion presses and forms marks on the surfaces of the plurality of tubes.