JP5124817B2 - Heat exchanger and manufacturing method thereof - Google Patents

Description

  The present invention relates to a heat exchanger and a manufacturing method thereof.

  In this specification and claims, the downstream side (direction indicated by arrow X in FIG. 2) of the air flowing through the ventilation gap between adjacent heat exchange tubes is referred to as the front, and the opposite side is referred to as the rear. .

  In recent years, as a heat exchanger used in an evaporator for a car air conditioner that can be reduced in size, weight, and performance, the present applicant has previously made a pair of header tanks spaced apart from each other, and both header tanks. A heat exchanging core provided between them, the heat exchanging core is arranged with the width direction in the front-rear direction and spaced in the length direction of the header tank, and both ends are connected to both header tanks. A heat exchanger having a plurality of flat heat exchange tubes and outer fins disposed between adjacent heat exchange tubes has been proposed (see Patent Document 1).

In the heat exchanger described in Patent Document 1, the heat exchange pipe and the outer fin are separately formed, and then the heat exchange pipe and the outer fin are alternately arranged in a stacked manner, and when the other parts are collectively brazed, the heat exchange pipe It is manufactured by brazing the outer fin and the outer fin to make a heat exchange core. In recent years, with the improvement of production technology, automation of the work of alternately arranging heat exchange tubes and outer fins in the production of the heat exchanger described in Patent Document 1 has been achieved and production efficiency has been increased. However, the improvement in production efficiency is approaching its limit.
JP 2008-20098 A

  An object of the present invention is to provide a heat exchanger that solves the above-described problems and can improve production efficiency as compared with the heat exchanger described in Patent Document 1, and a method for manufacturing the same.

  In order to achieve the above object, the present invention comprises the following aspects.

1) A pair of header tanks arranged at a distance from each other and a heat exchange core provided between the two header tanks are provided. A heat exchanger having a plurality of flat heat exchange tubes arranged at intervals in the length direction and having both ends connected to both header tanks, and outer fins arranged between adjacent heat exchange tubes Because
A heat exchange tube is formed by joining two metal plates for tube formation that are connected to each other by the first connecting portion at the front edge or the rear edge in a stacked manner, and forms both heat exchange tubes. When at least one of the tube-forming metal plates is bulged outwardly, the heat exchange tube is provided with at least one fluid circulation portion extending in the vertical direction and open at both the upper and lower ends and adjacent to each other. Side edge portions opposite to the side edge portions connected by the first connecting portion in the tube forming metal plate adjacent to the heat exchange tube are connected by the second connecting portion,
The outer fin is formed by joining two fin constituent members connected at the front edge portion or the rear edge portion by the third connecting portion in a laminated manner, and the second fin member in the adjacent fin member adjacent to the outer fin is formed. The heat exchanger by which the side edge parts on the opposite side to the side edge part connected by 3 connection parts are connected by the 4th connection part.

2) A pair of header tanks spaced apart from each other and a heat exchange core provided between the two header tanks are provided, with the heat exchange core facing the width direction in the front-rear direction and the header tank A heat exchanger having a plurality of flat heat exchange tubes arranged at intervals in the length direction and having both ends connected to both header tanks, and outer fins arranged between adjacent heat exchange tubes Because
A heat exchange tube is formed by joining two metal plates for tube formation that are connected to each other by the first connecting portion at the front edge or the rear edge in a stacked manner, and forms both heat exchange tubes. When at least one of the tube-forming metal plates is bulged outwardly, the heat exchange tube is provided with at least one fluid circulation portion extending in the vertical direction and open at both the upper and lower ends and adjacent to each other. Side edge portions opposite to the side edge portions connected by the first connecting portion in the tube forming metal plate adjacent to the heat exchange tube are connected by the second connecting portion,
The outer fin is formed by joining four or more even numbered fin constituent members connected at the front edge and / or the rear edge by the third connecting portion in a laminated manner, and adjacent outer fins are close to each other. The side edges opposite to the side edges connected by the third connecting parts at both ends of the fin component are connected by the fourth connecting parts, and all the other third connecting parts alternate between the front side and the rear side. Located in the heat exchanger.

  3) The heat exchanger according to 1) or 2) above, wherein the thickness of the tube-forming metal plate is 0.2 mm or less.

  4) The heat exchanger according to any one of 1) to 3) above, wherein the fin component has a thickness of 0.2 mm or less.

  5) Each header tank is provided with at least one header part extending in the length direction of the header tank, and a pipe insertion hole is formed in the header part, and the part corresponding to the fluid circulation part at both ends of the heat exchange pipe The heat exchanger according to any one of 1) to 4) above, wherein an insertion portion that is inserted into the header portion of the header tank is provided through the tube insertion hole.

  6) The header tank is provided with a plurality of header portions arranged in the front-rear direction, and the heat exchange pipe is provided with the same number of fluid circulation portions as the header portions arranged at intervals in the front-rear direction. The described evaporator.

7) A pair of header tanks spaced apart from each other and a heat exchange core provided between the two header tanks are provided. The heat exchange core has the width direction in the front-rear direction and the header tank. A heat exchanger having a plurality of flat heat exchange tubes arranged at intervals in the length direction and having both ends connected to both header tanks, and outer fins arranged between adjacent heat exchange tubes A method of manufacturing
A plurality of plate-shaped metal plates comprising at least one of the two tube-forming metal plates bulging outward, and the side edges of both the tube-forming metal plates are connected to each other by the first connecting portion The tube materials are arranged at intervals, and the side edge portions opposite to the side edge portions connected by the first connecting portions in the adjacent tube forming metal plates of the adjacent tube materials are connected by the second connecting portions. Preparing a connected heat exchange tube forming member;
A plurality of plate-like fin materials that are composed of an even number of fin constituent members and in which adjacent side edge portions of adjacent fin constituent members are connected by a third connecting portion are arranged at intervals, and Providing an outer fin forming member in which side edge portions opposite to the side edge portions connected by the third connecting portion in the adjacent fin constituent members are connected by the fourth connecting portion;
The heat exchange tube forming member is bent at the first and second connecting portions so that the bending directions at the two connecting portions are opposite to each other, whereby two tube forming metal plates are laminated together. And forming a tube module forming body composed of a plurality of tube combinations that are arranged at intervals and connected by the second connecting portion,
The outer fin forming member is bent at the third and fourth connecting portions so that the bending directions at the two connecting portions are opposite to each other, whereby even-numbered fin constituent members are stacked on each other and spaced from each other. A fin module forming body comprising a plurality of fin combinations that are arranged at a distance and connected by a fourth connecting portion;
The tube module forming body and the fin module forming body are connected to the second connecting portion and the fin of the tube module forming body such that each tube combination of the tube module forming body is located between adjacent fin combinations in the fin module forming body. Combining so that the fourth connecting part of the module forming body is located on the opposite side;
In addition to brazing the tube forming metal plates of each tube combination to make a heat exchange tube, brazing adjacent fin components of the fin combination to make an outer fin, and further to the end of the outer fin A method of manufacturing a heat exchanger, comprising brazing a fin component member of a portion to a tube forming metal plate of a heat exchange tube to form a heat exchange core.

  8) The method for producing a heat exchanger as described in 7) above, wherein the number of fin components constituting the fin material is two.

  9) The method for producing a heat exchanger as described in 7) or 8) above, wherein the heat exchange tube forming member and the outer fin forming member are each formed by pressing a metal plate.

  10) The method for producing a heat exchanger as described in 9) above, wherein the thickness of the metal plate forming the heat exchange tube forming member and the outer fin forming member is 0.2 mm or less.

  According to the heat exchangers of 1) and 2), when the heat exchanger is manufactured by the method of 7), it is composed of a tube module forming body composed of a plurality of tube combinations and a plurality of fin combinations. After combining the fin module forming body, the tube forming metal plates of each tube combining body are brazed together to form a heat exchange tube, and the adjacent fin constituent members of the fin combining body are brazed to the outer Since the fin is formed and the fin component at the end of the outer fin is brazed to the tube forming metal plate of the heat exchange tube to form the heat exchange core, a plurality of heat exchangers as in the heat exchanger described in Patent Document 1 are provided. Production efficiency is improved by eliminating the need to create separate heat exchange tubes and multiple outer fins, and to place separate heat exchange tubes and outer fins alternately.

  According to the heat exchanger of the above 3), it is possible to reduce the weight of the heat exchange tube, and thus to reduce the weight of the entire heat exchanger.

  According to the heat exchanger of the above 4), it is possible to reduce the weight of the outer fin, and thus to reduce the weight of the entire heat exchanger.

  According to the heat exchanger manufacturing method of the above 7), after combining a tube module formed body composed of a plurality of tube combinations and a fin module formed body composed of a plurality of fin combinations, Brazing the metal plates for tube formation to make a heat exchange tube, brazing adjacent fin components of the fin assembly to make outer fins, and further forming fin components at the ends of the outer fins Since the heat exchange core is formed by brazing the metal plate for forming the heat exchange tube, the heat exchange tube and the fin are separately manufactured as in the heat exchanger described in Patent Document 1, and separately. This eliminates the need for alternately arranging heat exchange tubes and fins, and improves production efficiency.

  According to the heat exchanger manufacturing method of 8) above, the fin height of the outer fin of the manufactured heat exchanger can be lowered, so that the fin effect is improved and the performance of the outer fin itself is excellent. become.

  According to the heat exchanger manufacturing method of 9) above, the heat exchange tube forming member and the outer fin forming member can be made relatively easily.

  According to the heat exchanger manufacturing method of 10) above, it is possible to reduce the weight of the heat exchange tubes and the outer fins in the manufactured heat exchanger, and thus to reduce the weight of the entire heat exchanger.

  Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the heat exchanger according to the present invention is applied to an evaporator of a car air conditioner.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum. In the following description, the top and bottom and the left and right in FIG.

  FIG. 1 shows the overall configuration of the evaporator, and FIGS. 2 to 3 show the configuration of the main part of the evaporator. 4 to 11 show a method for manufacturing an evaporator.

  As shown in FIGS. 1 and 2, the evaporator (1) (heat exchanger) includes an aluminum first header tank (2) and an aluminum second header that are spaced apart in the vertical direction and extend in the horizontal direction. A tank (3) and a heat exchange core (4) provided between the header tanks (2) and (3) are provided. The heat exchange core (4) is arranged with the width direction in the front-rear direction and a space in the left-right direction (the length direction of the header tanks (2) and (3)), and both upper and lower end portions of the header tanks (2 ) (3) A plurality of flat aluminum heat exchange tubes (5) and the ventilation gap between adjacent heat exchange tubes (5), and outside the heat exchange tubes (5) at both ends Each has an aluminum corrugated outer fin (6) disposed and brazed to the heat exchange tube (5). Aluminum side plates (7) are respectively disposed on the outer sides of the outer fins (6) at the left and right ends of the heat exchange core (4) and brazed to the outer fins (6).

  The first header tank (2) is located on the front side (downstream side in the ventilation direction) and extends in the left-right direction, and on the rear side (upstream side in the ventilation direction) and in the left-right direction, And a refrigerant outlet header portion (9) connected and integrated with the refrigerant inlet header portion (8). The refrigerant inlet header portion (8) and the refrigerant outlet header portion (9) of the first header tank (2) are partitioned by a partition member (11). The left and right ends of both header portions (8) and (9) of the first header tank (2) are closed. An aluminum refrigerant inlet pipe (not shown) is connected to one of the left and right ends of the refrigerant inlet header portion (8) of the first header tank (2), and the refrigerant inlet header portion (8) in the refrigerant outlet header portion (9) is also provided. The refrigerant outlet pipe made of aluminum (not shown) is connected to the same end as the side to which the inlet pipe is connected. The second header tank (3) is located on the front side and extends in the left-right direction, and connected to the first intermediate header portion (12) located on the rear side and extending in the left-right direction. And an integrated second intermediate header portion (13). The first intermediate header portion (12) and the second intermediate header portion (13) of the second header tank (3) communicate with each other through a communication hole (14). The left and right ends of both header portions (12) and (13) of the second header tank (3) are closed. The first header tank (2) and the second header tank (3) have the same outer cross-sectional shape in the peripheral wall, and are arranged upside down.

  A plurality of pipes that are long in the front-rear direction for inserting the upper end of the heat exchange pipe (5) into the lower part of the refrigerant inlet header (8) and the refrigerant outlet header (9) of the first header tank (2). A hole (15) is formed. The pipe insertion hole (15) of the refrigerant inlet header (8) and the pipe insertion hole (15) of the refrigerant outlet header (9) are at the same position in the left-right direction. A plurality of tubes long in the front-rear direction in which the lower end portions of the heat exchange tubes (5) are inserted into the upper portions of the first intermediate header portion (8) and the second intermediate header portion (9) of the second header tank (3), respectively. An insertion hole (16) is formed. The tube insertion hole (16) of the first intermediate header portion (12) and the tube insertion hole (16) of the second intermediate header portion (13) are at the same position in the left-right direction.

  As shown in FIGS. 2 and 3, the heat exchange pipe (5) is formed by laminating two rectangular tube forming metal plates (17) made of pressed aluminum brazing sheet and at the front edge. Are connected together by the first connecting part (18) over the entire length, and the strips (17a) of the front side edges of the metal plates for pipe formation (17), the strips (17b) of the rear side edges, and It is formed by brazing the belt-like portions (17c) at the center in the front-rear direction over the entire length. That is, the heat exchange pipe (5) is formed by bending a base plate made of two pipe forming metal plates (17) integrally connected by the first connecting portion (18) at the first connecting portion (18). The parts (17a), (17b) and (17c) are formed by brazing each other. It is preferable that the plate thickness of both the tube forming metal plates (17) forming the heat exchange tube (5) is 0.2 mm or less. The heat exchange pipe (5) has two fluid circulation parts (19) extending in the vertical direction and open at both upper and lower ends, spaced in the front-rear direction, that is, the first header tank (2) and the second header tank. There are as many header sections (8), (9), (12) and (13) as in (3). Also, the upper and lower ends of the rear edge of the adjacent pipe forming metal plate (17) of the adjacent heat exchange pipes (5) are connected by the second connecting part (21), whereby the evaporator (1 ) Includes a heat exchange module (22) including a plurality of heat exchange tubes (5) connected by the second connection portion (21).

  The fluid circulation part (19) of the heat exchange pipe (5) is a portion between the belt-like part (17a) at the front side edge of the pipe-forming metal plate (17) and the belt-like part (17c) at the center in the front-rear direction. In addition, in the portion between the strip-shaped portion (17b) at the rear edge of the both-plate-forming metal plate (17) and the strip-shaped portion (17c) at the central portion in the front-rear direction, both the tube-forming metal plates (17) Is formed by forming an outwardly bulging portion (23) extending over the entire length. The horizontal height of the fluid circulation part (19) of the heat exchange pipe (5), that is, the pipe height of the heat exchange pipe (5) is preferably 1.5 mm or less. In this case, since the air passage area can be increased, an increase in ventilation resistance can be suppressed. Further, an aluminum corrugated inner fin (24) is disposed so as to straddle both the fluid circulation portions (19) of the heat exchange pipe (5), and is brazed to the metal plate (17) for both pipe formation. ing. The wall thickness of the inner fin (24) is preferably 0.1 mm or less.

  The upper and lower ends of the belt-like portions (17a) and (17b) at both front and rear side edges of the tube forming metal plate (17) in the heat exchange pipe (5) are cut out from the front and rear outer edges to the upper and lower end faces. The excised part is indicated by (25). In addition, the upper and lower ends of the belt-like portion (17c) at the center in the front-rear direction of the tube forming metal plate (17) in the heat exchange tube (5) are wider in the front-rear direction than the other portions, A notch (26) is formed in the wide portion from the outer end in the vertical direction. In addition, by providing a wide part in the belt-like part (17c) in the center part in the front-rear direction of the heat exchange pipe (5), the upper and lower end parts of the fluid circulation part (19) are wider in the front-rear direction than the other parts. It is narrower. Then, the strips (23) of the front and rear side edges of the metal plate (17) for forming both tubes of the heat exchange tube (5), and the strip (17c) of the central portion in the front-rear direction The portion between the notch (26) corresponds to the fluid circulation portion (19) and protrudes outward in the vertical direction from the other portions. The first header tank (2 ) And an insertion portion (27) to be inserted into the pipe insertion holes (15) and (16) of the second header tank (3). When the insertion part (27) of the heat exchange pipe (5) is inserted into the pipe insertion holes (15) (16) of the first header tank (2) and the second header tank (3), the heat exchange pipe ( 5) The bottom part of the notch (26) in the belt-like part (17c) at the center in the front-rear direction is in contact with the outer surface of the first header tank (2) and the second header tank (3). It is a positioning part (28) for positioning the end of the heat exchange pipe (5). When the insertion part (27) of the heat exchange pipe (5) is inserted into the pipe insertion holes (15) (16) of the first header tank (2) and the second header tank (3), heat exchange is performed. The first header tank (2) and the second header tank face the cut-out portion (25) in the strips (17a) and (17b) at both front and rear edges of the pipe (5) and face outward in the vertical direction. It may be in contact with the outer surface of (3) or may not be in contact.

  The outer fin (5) is formed by laminating an even number of press-worked aluminum brazing sheets, here two rectangular fin components (29) and brazing each other. The heat exchange pipe (5) is shared by both the front and rear fluid circulation portions (19), and the width in the front-rear direction is substantially equal to the width of the heat exchange pipe (5). Each fin component member (27) of each outer fin (6) has a crest portion (29a) and a crest portion (29b), and the crest portions (29a) and the crest portions (29b) are positioned vertically. It consists of offset fins that are offset (see FIG. 8). Both fin components (29) are brazed to the tube forming metal plate (17) of the heat exchange tube (5), and the wave crest (29a) and the wave bottom (29b) of both fin components (29) Are brazed to each other. The fin height of the outer fin (6) is preferably 1.6 to 8 mm. In this case, the moldability of the outer fin (6) can be ensured and the performance can be improved.

  The upper and lower end portions of the rear side edge of each fin component member (29) of each outer fin (5) are integrally connected to each other by a flat third connecting portion (31). Further, the upper and lower ends of the front edge of the adjacent fin component member (29) adjacent to each other of the adjacent outer fins (6) are integrally connected by a flat fourth connecting portion (32), whereby the evaporator (1 ) Includes an outer fin module (33) including a plurality of outer fins (6) connected by the fourth connecting portion (32). And between the upper and lower 3rd connection parts (31) and between the upper and lower 4th connection parts (32), it is a ventilation part, respectively. In addition, the fin component member (29) on the outer side in the left-right direction of the outer fin (6) disposed at the left and right ends is not connected to the tube-forming metal plate (17).

  Next, a method for manufacturing the evaporator (1) will be described. In addition, in the description regarding the manufacturing method of an evaporator, the upper and lower sides and right and left of FIGS.

  First, as shown in FIGS. 4 and 5, it has three strips (17a) (17b) (17c), two outward bulges (23), a cutout (25), and a notch (26). A plurality of plate-shaped tube materials (36), which are composed of two tube-forming metal plates (17), and whose side edges of both tube-forming metal plates (17) are connected to each other by the first connecting portion (18). ) Are arranged at intervals, and the side edge opposite to the side edge connected by the first connecting part (18) in the adjacent pipe forming metal plate (17) of the adjacent pipe material (36). A heat exchange pipe forming member (35) in which the parts are connected by the second connecting part (21) is prepared. The heat exchange pipe forming member (35) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides. The thickness of the aluminum brazing sheet is preferably 0.2 mm or less.

  Further, as shown in FIG. 6 to FIG. 8, two rectangular fin constituent members (29) are formed, and adjacent side edge portions of adjacent fin constituent members (29) are connected by the third connecting portion (31). A side where a plurality of connected plate-like fin materials (38) are arranged at intervals and connected by the third connecting portion (31) in the adjacent fin constituent member (29) of the adjacent fin material (38) An outer fin forming member (37) is prepared in which side edge portions opposite to the edge portions are connected by a fourth connecting portion (32). The outer fin forming member (37) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides. The thickness of the aluminum brazing sheet is preferably 0.2 mm or less.

  Next, as shown in FIG. 9, each heat exchange tube forming member (35) is connected to both the connecting portions (18) and (21) on the left and right sides of the first connecting portion (18) and the second connecting portion (21). Are folded in an accordion door shape so that the bending directions of the tube members are opposite to each other, and the strip portions (17a), (17b), and (17c) of the both tube forming metal plates (17) of the respective tube materials (36) are combined. At the time of bending, inner fins (24) are arranged between the tube forming metal plates (17) of the respective tube materials (36). As a result, a plurality of tube combinations (41) in which two tube forming metal plates (17) are laminated with each other and are arranged at intervals and connected by the second connecting portion (21). ) Is formed (see FIG. 11).

  Further, as shown in FIG. 10, the outer fin forming member (37) is bent at both the connecting portions (31) and (32) on the left and right sides of the third connecting portion (31) and the fourth connecting portion (32). The fins are bent so that the directions are opposite to each other, whereby the two fin constituent members (29) are stacked on each other and are spaced apart from each other and connected by the fourth connecting portion (32). A fin module forming body (42) comprising a plurality of fin combinations (43) is produced (see FIG. 11).

  Next, as shown in FIG. 11, the tube module forming body (40) and the fin module forming body (42) are combined, and each tube combination body (41) of the tube module forming body (40) is replaced with the fin module forming body (42). The second connecting part (21) of the tube module forming body (40) and the fourth connecting part (32) of the fin module forming body (42) are opposite to each other so as to be between the adjacent fin combination bodies (43). Combine to be located at.

  Next, both ends of the pipe combination body (41) made of the pipe forming metal plate (17) in the pipe module formation body (40) are inserted into the pipe insertion holes (15) and (16) of the first and second header tanks. While inserting the portion (27), the side plate (7) is arranged outside the fin combination (43) composed of the fin constituent members (29) at both ends.

  Thereafter, the tube forming metal plates (17) of each tube combination (41) are brazed together to form a heat exchange tube (5), and a heat exchange tube module (22) comprising a plurality of heat exchange tubes (5). At the same time, the heat exchange pipe (5) is brazed to the first and second header tanks (2) and (3), and the adjacent fin component (29) of the fin combination (43) Braze each other to create outer fins (6), create an outer fin module (33) consisting of a plurality of outer fins (6), and outer fins (6) between adjacent heat exchange tubes (5) The fin component members (29) are brazed to the tube forming metal plate (17) of the heat exchange tube (5) to form the heat exchange core (4). Further, the side plate (7) is brazed to the fin component (29) outside the outer fin (6) at both ends. Thus, the evaporator (1) is manufactured.

  The evaporator (1) constitutes a refrigeration cycle using a chlorofluorocarbon refrigerant together with a compressor and a condenser as a refrigerant cooler, and is mounted on a vehicle, for example, an automobile, as a car air conditioner.

  In the evaporator (1) described above, when the compressor is turned on, the gas-liquid mixed phase two-phase refrigerant that has passed through the compressor, the condenser, and the expansion valve flows from the refrigerant inlet pipe to the refrigerant inlet header (8) of the first header tank (2). ), Flows into the front fluid circulation section (19) of the heat exchange pipe (5). The refrigerant that has flowed into the front fluid circulation part (19) of the heat exchange pipe (5) flows downward in the fluid circulation part (19) and into the first intermediate header part (12) of the second header tank (3). to go into. The refrigerant that has entered the first intermediate header portion (12) passes through the communication hole (14) and enters the second intermediate header portion (13).

  The refrigerant that has entered the second intermediate header section (13) is divided and flows into the rear fluid circulation section (19) of the heat exchange pipe (5), and flows upward to enter the refrigerant outlet header section (9). Enters and exits through the refrigerant outlet tube.

  Then, while the refrigerant flows in both the front and rear fluid circulation portions (19) of the heat exchange pipe (5), the refrigerant exchanges heat with the air passing through the ventilation gap between the adjacent heat exchange pipes (5). Flows out in the gas phase.

  12-14 shows the modification of the fin structural member used for the outer fin (6) of an evaporator (1).

  As shown in FIGS. 12 to 14, the fin component member (50) has a plurality of protrusions (52) that protrude outward in the left-right direction (the back side of the paper in FIG. 13) in a staggered arrangement on the substrate (51). It is a thing. The projections (52) of one fin component member (50) constituting each outer fin (6) and the projections (52) of the other fin component member (50) are in a position shifted from each other. When the tube module forming body (40) and the fin module forming body (42) are combined, the protrusion (52) of each fin component member (50) is the tube forming metal plate (41) of the tube combination body (41). It comes into contact with 17). Note that the rear edge portions of the substrates (51) of the fin component members (50) constituting each outer fin (6) are connected by the third connecting portion (31), and the adjacent outer fins (6) are adjacent to each other. The front edge portions of the substrate (51) of the fin component (50) are connected by the fourth connecting portion (32).

  Other configurations are the same as those of the fin component member (29) of the evaporator (1) of the above embodiment.

  In the above embodiment, the number of the tube module forming body (40) and the fin module forming body (42) forming the heat exchange core (4) of the evaporator (1) can be appropriately changed, and one tube module forming body ( 40) and one fin module forming body (42), one tube module forming body (40) and a plurality of fin module forming bodies (42), a plurality of tube module forming bodies (40) and one fin module forming body ( 42), and a plurality of tube module forming bodies (40) and a plurality of fin module forming bodies (42) may form a heat exchange core (4).

  Moreover, in the said embodiment, although one outer fin consists of two fin structural members, it is not limited to this, If the number of fin structural members is an even number, it can change suitably. When the number of fin constituent members is four or more, side edge portions opposite to the side edge portions connected by the third connecting portions at both ends of the adjacent fin constituent members of adjacent outer fins are connected by the fourth connecting portions. All other third connecting portions are connected alternately on the front side and the rear side.

  Furthermore, in the above embodiment, the heat exchanger according to the present invention is applied to the evaporator, but the present invention is not limited to this, and can be applied to a heat exchanger having other functions such as a condenser and a heater core. is there.

It is a rear view which shows the whole structure of embodiment of the evaporator to which the heat exchanger by this invention is applied. It is the AA line expanded sectional view of Drawing 1 which omitted some. FIG. 3 is an enlarged sectional view taken along line B-B in FIG. 2. It is a front view which shows the heat exchange pipe | tube formation member which makes the heat exchange pipe | tube of the evaporator of FIG. It is the elements on larger scale of FIG. It is a front view which shows the outer fin formation member which makes the outer fin of the evaporator of FIG. It is the elements on larger scale of FIG. FIG. 8 is an enlarged cross-sectional view taken along line CC in FIG. 7. It is a top view which shows the state which bends a heat exchange pipe formation member in manufacturing the evaporator of FIG. It is a top view which shows the state which bends an outer fin formation member in manufacturing the evaporator of FIG. It is a top view which shows the method of combining a tube module formation body and a fin module formation body in manufacturing the evaporator of FIG. It is a figure equivalent to FIG. 3 which shows the modification of the fin structural member which forms the outer fin of the evaporator of FIG. It is a figure equivalent to FIG. 5 which shows the modification of the fin structural member which forms the outer fin of the evaporator of FIG. It is the DD sectional view taken on the line of FIG.

Explanation of symbols

(1): Evaporator (heat exchanger)
(2) (3): Header tank
(4): Heat exchange core
(5): Heat exchange pipe
(6): Outer fin
(8): Refrigerant inlet header
(9): Refrigerant outlet header
(12) (13): Intermediate header
(15) (16): Tube insertion hole
(17): Metal plate for tube formation
(18): First connecting part
(19): Fluid distribution department
(21): Second connecting part
(23): Outward bulge
(27): Insertion section
(29) (50): Fin component
(31): Third connecting part
(32): Fourth connecting part

Claims (10)

It is provided with a pair of header tanks arranged at a distance from each other and a heat exchange core provided between the two header tanks. A heat exchanger having a plurality of flat heat exchange tubes arranged at intervals in the direction and having both ends connected to both header tanks and outer fins arranged between adjacent heat exchange tubes. And
A heat exchange tube is formed by joining two metal plates for tube formation that are connected to each other by the first connecting portion at the front edge or the rear edge in a stacked manner, and forms both heat exchange tubes. When at least one of the tube-forming metal plates is bulged outwardly, the heat exchange tube is provided with at least one fluid circulation portion extending in the vertical direction and open at both the upper and lower ends and adjacent to each other. Side edge portions opposite to the side edge portions connected by the first connecting portion in the tube forming metal plate adjacent to the heat exchange tube are connected by the second connecting portion,
The outer fin is formed by joining two fin constituent members connected at the front edge portion or the rear edge portion by the third connecting portion in a laminated manner, and the second fin member in the adjacent fin member adjacent to the outer fin is formed. The heat exchanger by which the side edge parts on the opposite side to the side edge part connected by 3 connection parts are connected by the 4th connection part. It is provided with a pair of header tanks arranged at a distance from each other and a heat exchange core provided between the two header tanks. A heat exchanger having a plurality of flat heat exchange tubes arranged at intervals in the direction and having both ends connected to both header tanks and outer fins arranged between adjacent heat exchange tubes. And
A heat exchange tube is formed by joining two metal plates for tube formation that are connected to each other by the first connecting portion at the front edge or the rear edge in a stacked manner, and forms both heat exchange tubes. When at least one of the tube-forming metal plates is bulged outwardly, the heat exchange tube is provided with at least one fluid circulation portion extending in the vertical direction and open at both the upper and lower ends and adjacent to each other. Side edge portions opposite to the side edge portions connected by the first connecting portion in the tube forming metal plate adjacent to the heat exchange tube are connected by the second connecting portion,
The outer fin is formed by joining four or more even numbered fin constituent members connected at the front edge and / or the rear edge by the third connecting portion in a laminated manner, and adjacent outer fins are close to each other. The side edges opposite to the side edges connected by the third connecting parts at both ends of the fin component are connected by the fourth connecting parts, and all the other third connecting parts alternate between the front side and the rear side. Located in the heat exchanger. The heat exchanger according to claim 1 or 2, wherein the tube-forming metal plate has a thickness of 0.2 mm or less. The heat exchanger according to any one of claims 1 to 3, wherein the fin component has a thickness of 0.2 mm or less. Each header tank is provided with at least one header portion extending in the length direction of the header tank, a pipe insertion hole is formed in the header portion, and a portion corresponding to the fluid circulation portion at both ends of the heat exchange pipe, The heat exchanger according to any one of claims 1 to 4, further comprising an insertion portion that is inserted into the header portion of the header tank through the tube insertion hole. 6. The header tank is provided with a plurality of header portions arranged in the front-rear direction, and the heat exchange pipe is provided with the same number of fluid circulation portions as the header portions arranged at intervals in the front-rear direction. Evaporator. It is provided with a pair of header tanks arranged at a distance from each other and a heat exchange core provided between the two header tanks. Manufactures a heat exchanger having a plurality of flat heat exchange tubes arranged at intervals in the direction and having both ends connected to both header tanks and outer fins arranged between adjacent heat exchange tubes A way to
A plurality of plate-shaped metal plates comprising at least one of the two tube-forming metal plates bulging outward, and the side edges of both the tube-forming metal plates are connected to each other by the first connecting portion The tube materials are arranged at intervals, and the side edge portions opposite to the side edge portions connected by the first connecting portions in the adjacent tube forming metal plates of the adjacent tube materials are connected by the second connecting portions. Preparing a connected heat exchange tube forming member;
A plurality of plate-like fin materials that are composed of an even number of fin constituent members and in which adjacent side edge portions of adjacent fin constituent members are connected by a third connecting portion are arranged at intervals, and Providing an outer fin forming member in which side edge portions opposite to the side edge portions connected by the third connecting portion in the adjacent fin constituent members are connected by the fourth connecting portion;
The heat exchange tube forming member is bent at the first and second connecting portions so that the bending directions at the two connecting portions are opposite to each other, whereby two tube forming metal plates are laminated together. And forming a tube module forming body composed of a plurality of tube combinations that are arranged at intervals and connected by the second connecting portion,
The outer fin forming member is bent at the third and fourth connecting portions so that the bending directions at the two connecting portions are opposite to each other, whereby even-numbered fin constituent members are stacked on each other and spaced from each other. A fin module forming body comprising a plurality of fin combinations that are arranged at a distance and connected by a fourth connecting portion;
The tube module forming body and the fin module forming body are connected to the second connecting portion and the fin of the tube module forming body such that each tube combination of the tube module forming body is located between adjacent fin combinations in the fin module forming body. Combining so that the fourth connecting part of the module forming body is located on the opposite side;
In addition to brazing the tube forming metal plates of each tube combination to make a heat exchange tube, brazing adjacent fin components of the fin combination to make an outer fin, and further to the end of the outer fin A method of manufacturing a heat exchanger, comprising brazing a fin component member of a portion to a tube forming metal plate of a heat exchange tube to form a heat exchange core. The manufacturing method of the heat exchanger of Claim 7 which makes the number of fin structural members which comprise a fin raw material into two. The method for manufacturing a heat exchanger according to claim 7 or 8, wherein the heat exchange tube forming member and the outer fin forming member are formed by pressing each metal plate. The manufacturing method of the heat exchanger of Claim 9 which sets the thickness of the metal plate which makes a heat exchange tube formation member and an outer fin formation member to 0.2 mm or less.

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