JP7057527B2 - How to make a heat exchanger - Google Patents

Description

The present disclosure relates to a method of manufacturing a heat exchanger.

For example, the heat exchanger described in Patent Document 1 includes a plurality of plate-shaped fins and a plurality of multi-hole tubes inserted into insertion holes formed in each of the plate-shaped fins. In such a heat exchanger, the refrigerant flowing inside the multi-hole tube is heat-exchanged with the air flowing while in contact with the plate-shaped fins.

Japanese Unexamined Patent Publication No. 10-78295

In order to improve the thermal conductivity in the heat exchanger described in Patent Document 1, the insertion hole of the plate-shaped fin should be made small, and the clearance between the multi-hole tube and the edge of the insertion hole of the plate-shaped fin should be made small. Just do it. However, if the insertion hole of the plate-shaped fin is made small, the insertion resistance of the multi-hole tube into the insertion hole becomes large when assembling the heat exchanger, and the insertion work of the multi-hole tube becomes difficult.

The present disclosure is intended to facilitate the assembly of heat exchangers.

(1) The method for manufacturing the heat exchanger of the present disclosure is as follows.
With fins with openings,
A method for manufacturing a heat exchanger comprising a multi-hole tube extending in a first direction and having a plurality of flow paths formed in a second direction orthogonal to the first direction and inserted into the opening.
The first step of bending the fins toward the first direction at the positions of the openings in the first direction and the third direction orthogonal to the second direction, respectively.
The second step of inserting the multi-hole tube into the opening of the bent fin, and
A third step of further bending the fin toward the first direction at the position of the opening by applying a force to the fin into which the multi-hole tube is inserted into the opening in the third direction. include.

In the method for manufacturing a heat exchanger configured in this way, in the third step, a force is applied to the fin in the third direction to bend the fin at the position of the opening, so that the size of the opening of the fin is applied to the fin. Since it is smaller than before the addition, the size of the fin opening can be increased in advance before the third step. Thereby, when the multi-hole tube is inserted into the opening of the fin in the second step, the insertion resistance of the multi-hole tube can be reduced. As a result, the multi-hole tube can be easily inserted into the opening of the fin, so that the heat exchanger can be easily assembled. Further, since the fins are bent in advance at the position of the opening in the first step, it is possible to form a folding habit in the fins. As a result, the fin can be bent in the intended direction when a force is applied to the fin in the third step.

(2) The fin is a press-molded product.
The first step is preferably performed before the step of dividing the press-molded fins to a predetermined length in the third direction.
In this case, it is possible to suppress the variation in the bending angle of the fins as compared with the case where the fins after being divided are bent one by one.

(3) In the third step, it is preferable to apply a force to the fins in the third direction while supporting the multi-hole tube.
In this case, the fins can be easily bent.

(4) The fin has a plurality of openings formed at intervals in the third direction.
In the second step, the plurality of multi-hole tubes are individually inserted into the plurality of openings of the fins.
In the third step, while supporting the plurality of the multi-hole pipes, a force is applied to the fins in the third direction so that the pitch between the adjacent multi-hole pipes becomes a predetermined length. preferable.
In this case, the pitch between adjacent multi-hole pipes can be aligned with the pitch between adjacent insertion holes in the header. This allows the plurality of multi-hole tubes to be inserted into the corresponding insertion holes of the header, even after the fins are bent by applying force to the fins.

(5) In the third step, jig blocks are arranged along the entire length of the fin in the second direction at both ends of the fin in the third direction, and these jig blocks are brought close to each other. It is preferable to apply a force to the fins in the third direction by moving at least one jig block in the third direction.
In this case, by using the jig block, the force can be evenly applied to the fin over the entire length in the second direction. The method of applying a force to the fins using this jig block is particularly effective when the fins are formed long in the second direction.

It is a schematic block diagram of the air conditioner which adopted the heat exchanger which concerns on embodiment. It is a schematic block diagram of an outdoor heat exchanger. It is an enlarged perspective view which shows a part of a heat exchange part. It is a front view of the plate material which is the source of a fin. It is a front view of the plate material which shows the molding process. It is a front view of the plate material which shows the row cutting process. It is sectional drawing of the fin which shows the state after a bending process. It is sectional drawing of the fin which shows the breaking process. It is a side view which shows the state which arranged a plurality of fins after a cutting process. It is sectional drawing of the fin which shows the insertion process. It is sectional drawing of the fin which shows the state after the insertion process. It is sectional drawing of the fin which shows the compression process. It is a perspective view of the jig device used in a compression process. It is a side view which saw the jig device from the front side. It is a perspective view which shows the use state of a jig device.

Hereinafter, embodiments will be described with reference to the accompanying drawings.
First, the heat configuration of the air conditioner in which the outdoor heat exchanger as the heat exchanger is adopted will be described. FIG. 1 is a schematic configuration diagram of an air conditioner. The air conditioner 1 is a device capable of cooling and heating a room such as a building by performing a steam compression type refrigeration cycle.

<Overall configuration of air conditioner>
The air conditioner 1 mainly includes an outdoor unit 2, a plurality of (here, two) indoor units 3, a liquid refrigerant connecting pipe 4, and a gas refrigerant connecting pipe 5. The steam compression type refrigerant circuit 6 of the air conditioner 1 is configured by connecting the outdoor unit 2 and the indoor unit 3 via a liquid refrigerant connecting pipe 4 and a gas refrigerant connecting pipe 5.

The outdoor unit 2 is installed outdoors (on the roof of a building, near a wall surface of a building, etc.) or in a basement, and constitutes a part of the refrigerant circuit 6. The outdoor unit 2 mainly has an accumulator 7, a compressor 8, a four-way switching valve 10, an outdoor heat exchanger 11, an outdoor expansion valve 12, a liquid side closing valve 13, a gas side closing valve 14, and an outdoor fan 15. ing. The devices 7, 8, 10, 11, 15 and the valves 12 to 14 are connected by the refrigerant pipes 16 to 22.

The indoor unit 3 is installed indoors and constitutes a part of the refrigerant circuit 6. The indoor unit 3 mainly has an indoor expansion valve 3a, an indoor heat exchanger 3b, and an indoor fan 3c.

<Operation of air conditioner>
In the air conditioner 1, a cooling operation and a heating operation are performed.
In the cooling operation, the indoor heat exchanger 3b is made to act as an evaporator, and the outdoor heat exchanger 11 is made to act as a condenser. Specifically, by switching the four-way switching valve 10 to the state shown by the solid line in FIG. 1, the compressor 8, the outdoor heat exchanger 11, the outdoor expansion valve 12, the indoor expansion valve 3a, and the indoor heat exchanger 3b The refrigerant is circulated in the order of.

In the heating operation, the indoor heat exchanger 3b is made to act as a condenser, and the outdoor heat exchanger 11 is made to act as an evaporator. Specifically, by switching the four-way switching valve 10 to the state shown by the broken line in FIG. 1, the compressor 8, the indoor heat exchanger 3b, the indoor expansion valve 3a, the outdoor expansion valve 12, and the outdoor heat exchanger 11 The refrigerant is circulated in the order of.

<Outdoor heat exchanger>
FIG. 2 is a schematic configuration diagram of the outdoor heat exchanger 11. The outdoor heat exchanger 11 is a heat exchanger that exchanges heat between the refrigerant and the outdoor air. The outdoor heat exchanger 11 mainly has a heat exchange unit 30, a first header 31, and a second header 32.
The heat exchange unit 30 has a plurality of multi-hole tubes 40 arranged at intervals in the vertical direction of FIG. 2, and a plurality of fins 50 arranged at intervals in the left-right direction of FIG. There is.

Both the first header 31 and the second header 32 are vertically long hollow cylindrical members. One end of each of the plurality of multi-hole pipes 40 is inserted into the first header 31. The other ends of the plurality of multi-hole pipes 40 are inserted into the second header 32, respectively. One end and the other end of each multi-hole pipe 40 are fixed to the first header 31 and the second header 32 by brazing or the like.

Of the internal space of the first header 31 and the internal space of the second header 32, the refrigerant that has flowed into one of the internal spaces flows into the other internal space via the multi-hole pipe 40. Air passes between the adjacent multi-hole pipes 40 and the adjacent fins 50 in the direction perpendicular to the paper surface of FIG. 2 by the outdoor fan 15 (see FIG. 1). Heat exchange is performed between the air passing in this way and the refrigerant flowing in the multi-hole pipe 40.

<Heat exchange section>
FIG. 3 is an enlarged perspective view showing a part of the heat exchange unit 30 shown in FIG. 2. In the following description, the first direction X shown in FIG. 3 is the front-back direction, the second direction Y is the left-right direction, and the third direction Z is the up-down direction. The first direction X, the second direction Y, and the third direction Z are orthogonal to each other.
The multi-hole tube 40 of the heat exchange section 30 is not particularly limited, but is, for example, a flat tube formed by extrusion molding. The multi-hole tube 40 is formed so as to extend in the front-rear direction X. Inside the multi-hole pipe 40, a plurality of small flow paths 43 through which the refrigerant flows are formed in the left-right direction Y.

The fin 50 of the heat exchange unit 30 is a plate member extending in the vertical direction Z, and has a predetermined width in the air passage direction (horizontal direction Y). The fin 50 of the present embodiment is a press-molded product manufactured by a progressive remittance mold described later. The fin 50 has a plurality of openings 51 formed at intervals in the vertical direction Z. Each opening 51 of the present embodiment is a hole formed through the fin 50 in the plate thickness direction (front-back direction X). Each opening 51 is formed long in the left-right direction Y at the intermediate portion of the fin 50 in the left-right direction Y.

A multi-hole tube 40 is inserted into each opening 51 of the fin 50. Note that FIG. 3 shows a state in which the multi-hole tube 40 is inserted into the two openings 51 of the fin 50, and the illustration of the multi-hole tube 40 inserted into the other openings 51 is omitted. The multi-hole tube 40 is inserted into an opening 51 formed at the same height position of each of the plurality of fins 50.

The fin 50 has a plurality of bent portions 52. The plurality of bent portions 52 are bent toward the front-rear direction X at the positions of the plurality of openings 51 in the vertical direction Z. The "bent portion" refers to a region having a curvature due to the bending of the fin 50. The curvature of the bent portion is set to an arbitrary value. The plurality of bent portions 52 are formed by alternately bending the fins 50 in opposite directions (forward and backward).

The fin 50 has a plurality of flat portions 53 formed between the bent portions 52 adjacent to each other in the vertical direction Z. The "flat portion" refers to a region having no curvature even when the fin 50 is bent. The fin 50 is formed in a V shape by each bent portion 52 and a pair of flat portions 53 adjacent to the upper and lower sides of the bent portion 52. The fin 50 is not limited to the shape of the present embodiment. For example, the fin 50 may be formed in a wavy shape so that the bent portions 52 that bend in opposite directions are continuously connected to each other without having the flat portion 53.

The fins 50 have a pair of tabs 54 formed at intervals in the left-right direction Y in each flat portion 53. Each tab 54 is formed by cutting a part of the flat portion 53 toward the front side. Each raised end of the tab 54 abuts on the flat portion 53 of the adjacent fins 50 to define the pitch between the adjacent fins 50.

The fin 50 has a plurality of collars 57 formed along the edge portion of each opening 51 so as to rise from the edge portion in the front-rear direction X. The plurality of collars 57 are formed by subjecting the fins 50 to a burring process. The collars 57 adjacent to each other in the vertical direction Z are formed so as to stand up in opposite directions (see FIG. 7).

<Manufacturing method of outdoor heat exchanger>
Next, a method of manufacturing the outdoor heat exchanger 11 configured as described above will be described.
FIG. 4 is a front view of the plate material 80 which is the source of the fin 50. The length of the plate material 80 in the vertical direction Z is formed to be longer than the specified length L in the vertical direction Z of the fin 50. The width of the plate material 80 in the left-right direction Y is formed to be longer than the specified width W0 in the left-right direction Y of the fin 50. The width of the plate material 80 in the present embodiment is formed to be three times as long as the specified width W0 in the fin 50.

In the width direction of the plate material 80, a plurality of rows (here, three rows) of progressive remittance molds (not shown) for press-molding the plate material 80 are arranged. By press-molding the plate 80 with these progressive molds, as shown in FIG. 5, the openings 51, tabs 54, and collars 57 corresponding to the three fins 50 are sequentially molded in the plate 80 (as shown in FIG. 5). Molding process). In the molding step, the width W1 of each opening 51 in the vertical direction Z is sufficiently larger than the thickness H (see FIG. 3) of the multi-hole pipe 40 in the vertical direction Z even when the fin 50 is bent in the bending step described later. It is molded to the dimensions.

Next, as shown in FIG. 6, the plate 80 on which the opening 51, the tab 54, and the collar 57 are molded is cut so as to be divided into three equal parts in the width direction (row cutting step). By this row cutting step, three fins 50 having a specified width W0 are formed. The length of each fin 50 in the vertical direction Z at this point is still longer than the specified length L.

Next, each fin 50 obtained in the row cutting step is press-molded and bent by a corresponding progressive mold (bending step (first step)). FIG. 7 is a cross-sectional view of the fin 50 showing a state after the bending step. Note that, in FIG. 7, the tab 54 is not shown (the same applies to FIGS. 8 to 12). In the bending step, the fins 50 are alternately bent toward the front side and the rear side in the front-rear direction X at the positions of the openings 51 in the vertical direction Z.

In the bending step, the fins 50 are bent shallowly to the extent that the positions of the openings 51 of the fins 50 are bent. By this bending step, a bent portion 59 that is shallowly bent in the front-rear direction X is formed at the position of each opening 51 of the fin 50.

Next, as shown in FIG. 8, each fin 50 in which a plurality of bent portions 59 are formed is divided by a predetermined length L in the vertical direction Z (dividing step). Then, as shown in FIG. 9, a plurality of fins 50 divided by a predetermined length L are arranged in the front-rear direction X so that the bending directions of the bending portions 59 are aligned. When arranging the plurality of fins 50 in the front-rear direction X, the tab 54 (see FIG. 3) of each fin 50 abuts on the adjacent fins 50, so that the plurality of fins 50 are arranged at equal intervals in the front-rear direction X. ..

Next, as shown in FIG. 10, a plurality of multi-hole pipes 40 are individually inserted into the plurality of openings 51 of each fin 50 (insertion step (second step)). In the insertion step, the multi-hole tube 40 is inserted in the direction opposite to the bending direction of the bent portion 59 formed at the position of the opening 51 to be inserted.

Specifically, when the bent portion 59 is bent toward the front side, the opening 51 corresponding to the bent portion 59 is opened from the fin 50 arranged on the front side among the plurality of fins 50 to the rear side. The multi-hole tube 40 is inserted toward the fin 50 arranged in. When the bent portion 59 is bent toward the rear side, the opening 51 corresponding to the bent portion 59 is arranged in the front side from the fin 50 arranged on the rearmost side among the plurality of fins 50. The multi-hole tube 40 is inserted toward the fin 50 to be formed.

As shown in FIG. 11, each multi-hole tube 40 is inserted so as to penetrate all the openings 51 formed at the same height position of each of the plurality of fins 50. As described above, the width W1 of each opening 51 has a size sufficiently larger than the thickness H of the multi-hole tube 40 even after the bending step. Therefore, when the multi-hole tube 40 is inserted into each opening 51 in the insertion step, The insertion resistance of the multi-hole tube 40 can be reduced.

Next, as shown in FIG. 12, by applying a force to compress the plurality of fins 50 in the vertical direction Z, the fins 50 are further bent (compressed) in the front-rear direction X at the positions of the openings 51. Process (third step)). In the compression step, while supporting the plurality of multi-hole pipes 40 by a jig device 90 (see FIG. 15 ) described later, a plurality of fins are provided so that the pitch P between the adjacent multi-hole pipes 40 becomes a predetermined length. Apply force to 50.

By this compression step, a bent portion 52 is formed at the position of each opening 51 of the fin 50. By forming the bent portion 52 at the position of each opening 51, the width W1 of each opening 51 becomes smaller. When the width W1 of each opening 51 becomes smaller, the tip of the collar 57 corresponding to each opening 51 comes into contact with the outer surface of the multi-hole tube 40 inserted in each opening 51. In this state, the outer surface of each multi-hole tube 40 is fixed to the corresponding collar 57 of each fin 50 by brazing.

<Jig device>
FIG. 13 is a perspective view of a jig device 90 used in the compression process when manufacturing the outdoor heat exchanger 11. FIG. 14 is a side view of the jig device 90 as viewed from the front side. The "front", "rear", "right", "left", "top", and "bottom" shown in FIG. 13 are the directions of the fins 50 (see FIG. 15) arranged in the jig device 90. , It is described so that the orientation of the fin 50 shown in FIG. 3 matches (the same applies to FIGS. 14 and 15). The jig device 90 includes a pair of guide members 91, a plurality of support members 92, a pair of blocks (jig blocks) 93, a first shaft member 94, a second shaft member 95, and a plurality of third shaft members 96. ing.

The pair of guide members 91 are arranged at intervals in the front-rear direction X. Each guide member 91 is a member formed long in the vertical direction Z. Each guide member 91 is formed with a guide hole 91a penetrating in the front-rear direction X. The guide hole 91a is formed long over the entire longitudinal direction of the guide member 91.

A plurality of support members 92 are arranged between the pair of guide members 91 by a predetermined number along each guide member 91. A predetermined number of support members 92 include a first support member 92A, a second support member 92B, and a plurality of third support members 92C. The first support member 92A is arranged on the uppermost side of each guide member 91. The second support member 92B is arranged at the lowermost side of each guide member 91. The plurality of third support members 92C are arranged between the first support member 92A and the second support member 92B.

The third support member 92C is a member formed long in the left-right direction Y. In the third support member 92C, a U-shaped groove 923 that opens at the right end thereof is formed long in the left-right direction Y. The end portion of the multi-hole tube 40 in the front-rear direction X is inserted into the groove 923 of the third support member 92C (see FIG. 15). A hole 924 penetrating in the front-rear direction X is formed at the left end portion of the third support member 92C.

The hole 924 of each third support member 92C arranged in the front guide member 91 and the hole 924 of each third support member 92C arranged in the rear guide member 91 have a third axis extending in the front-rear direction X. Both ends of the member 96 (not shown in FIG. 13) are inserted respectively. As a result, a pair of front and rear third support members 92C are connected to both ends of the third shaft member 96.

Both ends of the third shaft member 96 pass through the holes 924 of the third support member 92C and are inserted into the guide holes 91a of the front and rear guide members 91, respectively. Both ends of the third shaft member 96 inserted into each guide hole 91a are connected to each of the front and rear guide members 91 so as to be vertically movable along the guide hole 91a. When the third shaft member 96 moves up and down with respect to the pair of front and rear guide members 91, the pair of third support members 92C connected to both ends of the third shaft member 96 moves up and down.

The first support member 92A is formed in the shape of only the lower half of the third support member 92C. A semicircular groove 921 that opens upward is formed at the left end of the first support member 92A.
The second support member 92B is formed in the shape of only the upper half of the third support member 92C. A semicircular groove 922 that opens downward is formed at the left end of the second support member 92B.

The pair of blocks 93 includes a first block 93A and a second block 93B arranged apart from each other in the vertical direction Z between the pair of guide members 91. The first block 93A is arranged on the upper side between the pair of guide members 91. The second block 93B is arranged on the lower side between the pair of guide members 91.

The first block 93A and the second block 93B are members having the same shape. The first block 93A and the second block 93B of the present embodiment are rectangular parallelepiped members formed long in the front-rear direction X. The width of the first block 93A and the second block 93B in the left-right direction Y is longer than the width W0 of the fin 50 in the left-right direction Y (see FIG. 6).

A first shaft member 94 extending in the front-rear direction X is arranged on the upper side of the first block 93A. Both ends of the first shaft member 94 are fitted into the groove 921 of the first support member 92A arranged in the guide member 91 on the front side and the groove 921 of the first support member 92A arranged in the guide member 91 on the rear side, respectively. It has been. As a result, a pair of front and rear first support members 92A are connected to both ends of the third shaft member 96.

Both ends of the first shaft member 94 are fitted into the grooves 921 of the first support member 92A as described above, and are inserted into the guide holes 91a of the front and rear guide members 91, respectively. Both ends of the first shaft member 94 inserted into the guide holes 91a are connected to the front and rear guide members 91 so as to be vertically movable along the guide holes 91a. When the first shaft member 94 moves up and down with respect to the pair of front and rear guide members 91, the pair of first support members 92A connected to both ends of the first shaft member 94 moves up and down. When the first support member 92A moves downward, the first block 93A is also pushed by the first shaft member 94 and moves downward.

A second shaft member 95 extending in the front-rear direction X is arranged below the second block 93B. Both ends of the second shaft member 95 are fitted into the groove 922 of the second support member 92B arranged in the guide member 91 on the front side and the groove 922 of the second support member 92B arranged in the guide member 91 on the rear side, respectively. It has been. As a result, a pair of front and rear second support members 92B are connected to both ends of the second shaft member 95.

Both ends of the second shaft member 95 are fitted into the grooves 922 of the second support member 92B as described above, and are inserted into the guide holes 91a of the front and rear guide members 91, respectively. Both ends of the second shaft member 95 inserted into the guide holes 91a are connected to the front and rear guide members 91 so as to be vertically movable along the guide holes 91a. When the second shaft member 95 moves up and down with respect to the pair of front and rear guide members 91, the pair of second support members 92B connected to both ends of the second shaft member 95 moves up and down. When the second support member 92B moves upward, the second block 93B is also pushed by the second shaft member 95 and moves upward.

FIG. 15 is a perspective view showing a usage state of the jig device 90. The jig device 90 is used in the compression step to apply a force in the vertical direction Z to the plurality of fins 50 after the insertion step (see FIG. 11). First, as shown in FIG. 15, both front and rear ends of the multi-hole tube 40 penetrating the openings 51 of the plurality of fins 50 are inserted into each groove 923 of the pair of front and rear third support members 92C in the jig device 90.

By inserting the front and rear ends of each multi-hole pipe 40 into each groove 923 of the front and rear pair of third support members 92C, each multi-hole pipe 40 is supported by the front and rear pair of third support members 92C so as to be vertically movable. To. With each multi-hole tube 40 supported in this way, the first block 93A and the second block 93B are arranged at both ends of each of the plurality of fins 50 arranged in the front-rear direction X in the vertical direction Z, respectively. The first block 93A and the second block 93B are arranged along the entire length of each fin 50 in the left-right direction Y.

Next, from the state shown in FIG. 15, the first shaft member 94 is moved downward along the guide hole 91a, and the second shaft member 95 is moved upward along the guide hole 91a (see FIG. 14). .. When the first shaft member 94 and the second shaft member 95 are moved, respectively, the first block 93A and the second block 93B move so as to approach each other. Due to this movement, a force in the vertical direction Z is applied to the plurality of fins 50. The first block 93A and the second block 93B are moved until the pitch P between the adjacent multi-hole pipes 40 reaches a predetermined length.

<Action and effect of the embodiment>
According to the present embodiment, in the compression step, a force is applied to the fin 50 in the vertical direction Z to bend the fin 50 at the position of the opening 51, so that the size of the opening 51 of the fin 50 applies a force to the fin 50. Since it is smaller than before, the size of the opening 51 of the fin 50 can be increased in advance before the compression step. Thereby, when the multi-hole tube 40 is inserted into the opening 51 of the fin 50 in the insertion step, the insertion resistance of the multi-hole tube 40 can be reduced. As a result, the multi-hole tube 40 can be easily inserted into the opening 51 of the fin 50, so that the outdoor heat exchanger 11 can be easily assembled.

Since the fin 50 is bent shallowly in advance at the position of the opening 51 in the bending step, a bending habit can be formed on the fin 50. As a result, when a force is applied to the fins 50 in the compression step, the fins 50 can be bent in the intended direction. Further, the force applied to the fin 50 can be reduced as compared with the case where the fin 50 is not bent in advance.

Since the bending step is performed before the dividing step of dividing the press-molded fins 50 by a specified length L, the bending angle of the fins 50 varies as compared with the case where the divided fins 50 are bent one by one. It can be suppressed from occurring.

In the compression step, since the force is applied to the fin 50 while supporting the multi-hole tube 40 by the jig device 90, the fin 50 can be easily bent.

In the compression step, while supporting the plurality of multi-hole pipes 40 by the jig device 90, a force is applied to the fins 50 so that the pitch P between the adjacent multi-hole pipes 40 becomes a predetermined length. By applying the force to the fins 50 in this way, the pitch P between the adjacent multi-hole pipes 40 is aligned with the pitch between the insertion openings of the multi-hole pipes 40 in each of the first header 31 and the second header 32. Can be done. Thereby, even after the fin 50 is bent by applying a force to the fin 50, the plurality of multi-hole pipes 40 can be inserted into the corresponding insertion openings of the first header 31 and the second header 32, respectively.

In the compression step, the first block 93A and the second block 93B of the jig device 90 are arranged at both ends of the fin 50 in the vertical direction Z along the entire length of the fin 50 in the horizontal direction Y, respectively. By moving the first block 93A and the second block 93B arranged in this way in the vertical direction Z so as to be close to each other and applying a force to the fin 50, the force is evenly applied to the fin 50 over the entire length in the left-right direction Y. Can be added. The method of applying a force to the fin 50 using the jig device 90 is particularly effective when the fin 50 is formed long in the left-right direction Y.

<Other variants>
The opening 51 of the fin 50 in the above embodiment is formed in the middle portion of the fin 50, but may be formed unevenly on one side in the left-right direction Y. Further, the opening 51 of the fin 50 in the above embodiment is not limited to the hole. For example, the opening 51 may be cut out in a U shape so as to open at one end side of the fin 50 in the left-right direction Y.

In the above embodiment, the bending step (first step) is performed after the row cutting step, but it may be performed before the row cutting step. In the above embodiment, both the first block 93A and the second block 93B of the jig device 90 are moved, but only the other block may be moved while one block is fixed. In the above embodiment, the compression step is performed with the multi-hole tube 40 supported by the jig device 90, but the compression step may be performed without supporting the multi-hole tube 40.

The present disclosure is not limited to the above examples, but is shown by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

11 Outdoor heat exchanger (heat exchanger)
40 Multi-hole pipe 43 Flow path 50 Fins 51 Opening 93 Block (jig block)

Claims (4)

Fins (50) with an opening (51) and
A heat exchanger comprising a multi-hole tube (40) extending in a first direction and having a plurality of flow paths (43) formed in a second direction orthogonal to the first direction and inserted into the opening (51). It is a manufacturing method of
The first step of bending the fin (50) toward the first direction at the position of the opening (51) in the first direction and the third direction orthogonal to the second direction, respectively.
The second step of inserting the multi-hole tube (40) into the opening (51) of the bent fin (50), and
By applying a force in the third direction to the fin (50) into which the multi-hole tube (40) is inserted into the opening (51), the fin (50) is placed at the position of the opening (51). The third step of further bending toward the first direction is included.
In the third step, a method for manufacturing a heat exchanger in which a force is applied to the fins (50) in the third direction while supporting the multi-hole tube (40) . Fins (50) with an opening (51) and
A heat exchanger comprising a multi-hole tube (40) extending in a first direction and having a plurality of flow paths (43) formed in a second direction orthogonal to the first direction and inserted into the opening (51). It is a manufacturing method of
The first step of bending the fin (50) toward the first direction at the position of the opening (51) in the first direction and the third direction orthogonal to the second direction, respectively.
The second step of inserting the multi-hole tube (40) into the opening (51) of the bent fin (50), and
By applying a force in the third direction to the fin (50) into which the multi-hole tube (40) is inserted into the opening (51), the fin (50) is placed at the position of the opening (51). The third step of further bending toward the first direction is included.
In the third step, jig blocks (93) are arranged at both ends of the fin (50) in the third direction along the entire length of the fin (50) in the second direction, and these jigs are arranged. A heat exchanger that applies force to the fins (50) in the third direction by moving at least one jig block (93) in the third direction so that the blocks (93) are closer to each other. Manufacturing method. The fin (50) is a press-molded product and is a press-molded product.
The heat exchange according to claim 1 or 2 , wherein the first step is performed prior to the step of dividing the press-molded fin (50) by a specified length (L) in the third direction. How to make a vessel. The fin (50) has a plurality of openings (51) formed at intervals in the third direction.
In the second step, the plurality of multi-hole tubes (40) are individually inserted into the plurality of openings (51) of the fins (50).
In the third step, while supporting the plurality of the multi-hole pipes (40), the fins (50) are provided with a predetermined length so that the pitch (P) between the adjacent multi-hole pipes (40) becomes a predetermined length. The method for manufacturing a heat exchanger according to any one of claims 1 to 3, wherein a force is applied to the third direction.

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