JP5322631B2 - Plate for flat tube production, flat tube and heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate-like body for manufacturing a flat tube, capable of improving productivity. <P>SOLUTION: This plate-shaped body 20 for manufacturing the flat tube, is made of a sheet of rolled plate formed by rolling the entire metal blank. The plate-like body 20 for manufacturing the flat tube, includes an upper wall forming section 21 and a lower wall forming section 22, a connecting section 23 integrally connecting the both upper and lower wall forming sections 21, 22 and forming a side wall at one side, and first to forth side wall forming sections 8, 9, 11, 12 disposed at an outer edge section at a side opposite to the connecting section 23, of the both upper and lower wall forming sections 21, 22, and forming a side wall of a multiple structure at the other side. Volumes of both side parts 24, 25 in the width direction through a central line O in the width direction, of the connecting section 23 of the plate-like body 20 for manufacturing the flat tube, are equal to each other. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a heat exchange pipe for a heat exchanger, such as a condenser for an air conditioner or a refrigerant circulation pipe for an evaporator, an oil circulation pipe for an automobile oil cooler, an engine cooling water circulation pipe for an automobile radiator, and an engine cooling water circulation pipe for a heater core. The present invention relates to a flat tube manufacturing plate used for manufacturing a flat tube used as a flat tube, a flat tube, and a heat exchanger using the flat tube.

  In this specification, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  For example, as a heat exchanger (70) applied to a condenser of a car air conditioner of a vehicle, as shown in FIG. 8, a pair of aluminum headers (71) (72) spaced apart from each other, A plurality of aluminum heat exchange tubes that are arranged in the width direction between the headers (71) and (72) and spaced apart in the vertical direction, and whose both ends are connected to both headers (71) and (72) (73) and an aluminum corrugated fin (74) disposed between the adjacent heat exchange tubes (73) and outside the heat exchange tubes (73) at both upper and lower ends and brazed to the heat exchange tubes (73). ) And a side plate (75) disposed outside the corrugated fins (74) at both upper and lower ends and brazed to the corrugated fins (74), and the left header (71) from the center in the height direction. The upper part is also divided into two upper and lower header parts (71a) and (71b) by a partition member (76), and 72 (72) is divided into two upper and lower header parts (72a) (72b) by a partition member (76) below the central part in the height direction, and the upper header part (71a) of the left header (71). A fluid inlet (not shown) is formed, and an inlet member (77) having a fluid inflow passage (77a) leading to the fluid inlet is brazed to the upper header portion (71a), and the lower header portion (72b ), A fluid outlet (not shown) is formed, and an outlet member (78) having a fluid outflow passage (78a) communicating with the fluid outlet is brazed to the lower header portion (72b). Patent Document 1).

  The left and right headers (71), (72) of the heat exchanger (70) described above are cylindrical pipes made of aluminum brazing sheets having brazing material layers on at least the outer surfaces, for example, aluminum brazing sheets having brazing material layers on both sides. The header body (80) is made of a brazed pipe that is molded into a piece and brazed to each other with the side edges partially overlapped, and the both ends of the header body (80) are brazed to close the openings at both ends. And an aluminum closing member (81).

  The heat exchanger pipe (73) of the heat exchanger (70) is required not only to have excellent heat exchange efficiency but also to have pressure resistance because high-pressure gas refrigerant is introduced into the heat exchanger pipe (73). Moreover, in order to reduce the size of the capacitor, it is required that the tube wall of the flat tube is thin and the tube height is low.

  As described in Patent Document 1, a flat tube excellent in heat exchange efficiency used for the heat exchange tube (73) spans a pair of flat walls facing each other and both side edges of both flat walls. It is provided with two side walls provided, and a plurality of reinforcing walls extending between the two side walls and extending in the lengthwise direction and spaced apart from each other by a predetermined distance. And one side wall is formed integrally with both flat walls, and the other side wall is formed by combining a plurality of side wall forming portions formed integrally with the side edges of both flat walls. The side wall of the double structure is formed on the outer edge of the first flat wall and protrudes toward the second flat wall, and the tip is at the middle of the height of the side wall of the double structure. A first side wall forming portion located on the outer edge of the second flat wall, A second side wall forming part protruding toward the flat wall side and having a tip abutting against the tip surface of the second side wall forming part, and a second flat wall side formed on an outer portion of the first side wall forming part in the first flat wall. And a third side wall forming part that covers the outer surfaces of the first side wall forming part and the second side wall forming part and whose tip reaches the outer surface of the second flat wall, and forms the first side wall forming part and the second side wall forming part. The tip of each part is brazed to each other, and the third side wall forming part and the first and second side wall forming parts are brazed.

  The flat tube described in Patent Document 1 is composed of a single rolled plate formed by subjecting a metal base plate to a rolling process, and two flat wall forming portions and both flat wall forming portions are integrated. First and second side wall formation provided so as to protrude from the flat wall forming portion on the side edge opposite to the connecting portion in both the flat wall forming portions, and a connecting portion that connects and forms one side wall And a plate-like body for manufacturing a flat tube having a third side wall forming portion provided by extending a side edge of the first flat wall forming portion opposite to the connecting portion. In which the tips of the first and second side wall forming parts are brought into contact with each other, the third side wall forming part is bent, and the outer surfaces of the first and second side wall forming parts are covered by the third side wall forming part. If you make a folded body by caulking, The distal end portion to each other of the first side wall forming portion and a second side wall forming portions with brazing is produced by a third side wall forming portion and first and second side wall forming portions brazed to.

  According to the flat tube manufacturing plate-like body described in Patent Document 1, even when used in a heat exchanger such as a condenser, the double-structure side wall is prevented from being damaged due to the collision of a foreign object, and a refrigerant leaks. Is prevented. In addition, in the cross-sectional shape of the side wall of the double structure, the brazing length of all the side wall forming portions that form the side wall becomes relatively long, so that brazing strength is improved and corrosion resistance due to corrosion of the brazing portion is improved. A decrease can be prevented.

However, in the flat tube manufacturing plate-like body described in Patent Document 1, the volume of both side portions in the width direction across the center line in the width direction of the connecting portion is uneven by the amount corresponding to the third side wall forming portion. Therefore, during rolling of the flat tube manufacturing plate-like body, a pressure difference is generated at both sides in the width direction across the center line in the width direction of the connecting portion, and roll escape may occur. And in order to prevent generation | occurrence | production of the roll escape at the time of rolling and to obtain the plate-shaped body for flat tube manufacture of a required shape, it is necessary to enlarge a rolling load and will cause a productivity fall.
JP 2006-78163 A

  An object of the present invention is to provide a flat tube manufacturing plate, a flat tube, and a heat exchanger that can solve the above problems and improve productivity.

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

1) It is provided with a pair of flat walls facing each other and two side walls provided across both side edges of both flat walls, and one side wall is formed integrally with both flat walls and has a single structure. And the other side wall is formed by combining a plurality of side wall forming portions integrally formed on the side edges of both flat walls, and a flat tube for manufacturing a flat tube having a multiple structure A plate for manufacturing,
The whole comprises a single rolled plate formed by rolling a metal base plate, and connects two flat wall forming portions and both flat wall forming portions together to form one side wall. A connecting portion, and a plurality of side wall forming portions that are provided on the outer edge portion on the opposite side of the connecting portion in both flat wall forming portions to form the other side wall, and the center line in the width direction of the connecting portion is The volume on both sides of the sandwiched width is equal ,
A first side wall forming portion is formed on the outer edge of the first flat wall forming portion opposite to the connecting portion so as to protrude from the first flat wall forming portion. A second side wall forming portion that is connected straightly and extends outward is formed, and the second flat wall forming portion has a second side wall forming portion that protrudes from the second flat wall forming portion on the outer edge opposite to the connecting portion. 3 side wall forming portions are formed, and a fourth side wall forming portion extending straight outwardly and continuously with the second flat wall forming portion is formed, and the first side wall forming portion and the third side wall forming portion are connected to each other. The second side wall forming portion and the fourth side wall forming portion are formed at positions that are symmetrical with respect to the center line in the width direction of the portion, and are shaped so that the front end surfaces of the side wall forming portions abut each other. And the shape of the tip faces of each other Flat tube for manufacturing the plate-like body being.

2) The first side wall forming portion and the third side wall forming portion have the same thickness, and the thin wall extends in the length direction on the outer side in the width direction of the first flat wall forming portion at the front end surface of the first side wall forming portion. Are formed over the entire length, and on the inner side in the width direction of the second flat wall forming portion on the distal end surface of the third side wall forming portion, a thin second protrusion extending in the length direction is formed over the entire length, The heights of the first and second ridges are equal, and the total thickness of the first and second ridges is the sum of the thicknesses of the first and third sidewall forming portions. The plate for producing a flat tube according to the above 1), which is equal to the wall thickness .

3) It has a pair of flat walls facing each other and two side walls provided across both side edges of both flat walls, and one side wall is formed integrally with both flat walls and has a single structure. And the other side wall is formed by combining a plurality of side wall forming portions integrally formed on the side edges of both flat walls, and a flat tube for manufacturing a flat tube having a multiple structure A plate for manufacturing,
The whole comprises a single rolled plate formed by rolling a metal base plate, and connects two flat wall forming portions and both flat wall forming portions together to form one side wall. A connecting portion, and a plurality of side wall forming portions that are provided on the outer edge portion on the opposite side of the connecting portion in both flat wall forming portions to form the other side wall, and the center line in the width direction of the connecting portion is The volume on both sides of the sandwiched width is equal,
A first side wall forming portion is formed on the outer edge of the first flat wall forming portion opposite to the connecting portion so as to protrude from the first flat wall forming portion. A second side wall forming portion that is connected straightly and extends outward is formed, and the second flat wall forming portion has a second side wall forming portion that protrudes from the second flat wall forming portion on the outer edge opposite to the connecting portion. 3 side wall forming portions are formed, and a fourth side wall forming portion that extends straight outwardly from the second flat wall forming portion is formed, and the thickness of the first side wall forming portion is the third side wall forming portion. The first side wall forming portion and the third side wall forming portion are formed at positions symmetrical with respect to the center line in the width direction of the connecting portion, and the width of the second side wall forming portion is the first thickness. 4. A plate for producing a flat tube that is wider than the width of the side wall forming part .

4) A thin ridge extending in the length direction is formed over the entire length on the inner side in the width direction of the first flat wall forming portion on the tip surface of the third side wall forming portion, and the thickness of the ridge and the first side wall forming portion The plate for manufacturing a flat tube as described in 3) above, wherein the total thickness is equal to the thickness of the third side wall forming portion .

5) When the volume of the width direction one side part which pinched | interposed the center line of the width direction of a connection part is set to V1, and the volume of the width direction other side part is set to V2, 0.97 <= V1 / V2 <= 1.03. The plate for producing a flat tube according to any one of the above 1) to 4), which satisfies the above.

6) The plate for manufacturing a flat tube according to any one of 1) to 5), wherein the thicknesses of both flat wall forming portions are equal.

7) A plurality of reinforcing wall forming portions are integrally formed in a raised shape on both flat wall forming portions, and the total volume of all reinforcing wall forming portions of one flat wall forming portion and the other flat wall forming portion The total volume of all the reinforcing wall forming portions is equal, and the reinforcing wall forming portion of one flat wall forming portion and the reinforcing wall forming portion of the other flat wall forming portion are in relation to the center line in the width direction of the connecting portion. The plate for manufacturing a flat tube according to any one of 1) to 6) above, which is in a symmetrical position.

8) It has a pair of flat walls facing each other and two side walls provided across both side edges of both flat walls, and one side wall is formed integrally with both flat walls and has a single structure. And the other side wall is a flat tube having a multiple structure formed by combining a plurality of side wall forming parts integrally formed on the side edges of both flat walls,
The flat tube manufacturing plate-like body according to 1) or 2) above is bent into a hairpin shape at the connecting portion, the front end surfaces of the first side wall forming portion and the third side wall forming portion are butted together, and further the second side wall forming portion And a flat tube in which multiple side walls are formed by bending the fourth side wall forming part to obtain a bent body by abutting the end faces and brazing all the side wall forming parts of the bent body.

9) It has a pair of flat walls facing each other and two side walls provided across both side edges of both flat walls, and one side wall is formed integrally with both flat walls and has a single structure. And the other side wall is a flat tube having a multiple structure formed by combining a plurality of side wall forming parts integrally formed on the side edges of both flat walls,
The flat tube manufacturing plate-like body described in 3) or 4) above is bent into a hairpin shape at the connecting portion, the front end surfaces of the first side wall forming portion and the third side wall forming portion are butted together, and the fourth side wall forming portion A flat tube in which the second side wall forming part is bent after bending to obtain a bent body, and multiple side walls are formed by brazing all the side wall forming parts of the bent body.

10) A plurality of flat tubes described in the above 8) or 9) are arranged in parallel and spaced apart from each other between a pair of headers spaced apart from each other. Is a heat exchanger that is brazed to both headers, fins are arranged in the ventilation gap between adjacent flat tubes, and are brazed to the flat tubes.

According to the flat tube manufacturing plate-like body of 1) to 7) above, the volume of both side portions in the width direction across the center line in the width direction of the connecting portion is uniform. Compared to the case of a plate for production, it becomes possible to reduce the pressure difference that occurs at both sides in the width direction across the center line in the width direction of the connecting portion during rolling, thereby suppressing the occurrence of roll escape. it can. Therefore, it becomes possible to make a rolling load small compared with the case of the flat tube manufacturing plate-like body described in Patent Document 1, and productivity is improved.

According to the flat tube manufacturing plate-like bodies of 1) to 4), 6), and 7) above, the volumes of both side portions in the width direction across the center line in the width direction of the connecting portion are relatively easily equalized. be able to.

According to the flat tubes of the above 8) and 9) , even when used in a heat exchanger such as a condenser, damage to the side walls of the multiple structure due to the collision of foreign matter is prevented, and leakage of refrigerant and the like is prevented. . Further, in the cross-sectional shape of the side wall of the multiple structure, the brazing length of all the side wall forming portions that form the side wall becomes relatively long, so that the brazing strength is improved and the corrosion resistance is reduced due to the corrosion of the brazing portion. Can be prevented.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the top and bottom and the left and right in FIGS.

  In addition, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

Embodiment 1
This embodiment is shown in FIGS.

  1 and 2 show a flat tube manufactured from the flat tube manufacturing plate of Embodiment 1, FIG. 3 shows the flat tube manufacturing plate of Embodiment 1, and FIG. 4 shows the flat tube of FIG. A part of process which manufactures a flat tube from the plate-shaped object for pipe manufacture is shown.

  In FIG. 1 and FIG. 2, the flat tube (1) is made of aluminum, and has flat upper and lower walls (2) and (3) (a pair of flat walls) facing each other and having the same thickness, and upper and lower walls (2 ) (3) straddling the right side edges of the upper and lower walls (2) (3) and the right side wall (4) formed integrally with the left and right edges of the upper and lower walls (2) (3) and the upper and lower walls ( 2) The left side wall (5) of double structure (multiple structure) formed by combining multiple side wall forming parts integrally formed on the left side edge of (3), and between the side walls (4) (5) The upper and lower walls (2) and (3) are provided with an even number of reinforcing walls (6) extending in the lengthwise direction and spaced apart from each other in the left-right direction. It has a passage (7).

  The left side wall (5) includes a first side wall forming part (8) and a second side wall forming part (9) formed integrally with the upper wall (2) (first flat wall), and a lower wall (3) (first The second side wall forming portion (11) and the fourth side wall forming portion (12) integrally formed on the (2 flat walls) are brazed in combination.

  The first side wall forming part (8) is integrally formed on the left edge of the upper wall (2) and protrudes toward the lower wall (3), and the tip is located at the middle part of the height of the left wall (5). doing. A thin first protrusion that protrudes toward the lower wall (3) and extends in the length direction on the left side portion (the outer portion in the width direction of the upper wall (2)) of the front end surface of the first side wall forming portion (8). 8a) is integrally formed over the entire length. The right side portion of the front end surface of the first side wall forming portion (8) and the front end surface of the first protrusion (8a) are horizontal surfaces.

  The second side wall forming portion (9) is formed integrally with the left side portion (outer portion) of the first side wall forming portion (8) at the left edge of the upper wall (2) and protrudes toward the lower wall (3) side. The tip is located at the middle of the height of the left side wall (5), and the wall thickness is equal over the entire height. The distal end surface of the second side wall forming portion (9) is an inclined surface that is inclined upward toward the right. The second side wall forming portion (9) is brazed to the left side surface of the first side wall forming portion (8).

  The third side wall forming portion (11) is integrally formed on the left edge (outer edge) of the lower wall (3), protrudes toward the upper wall (2), and has a tip at the middle of the height of the left wall (5). Located in the department. A thin second ridge that protrudes toward the upper wall (2) and extends in the length direction on the right side portion (the inner portion in the width direction of the lower wall (3)) of the tip surface of the third side wall forming portion (11) ( 11a) is integrally formed over the entire length. The left side portion of the tip surface of the third side wall forming portion (11) and the tip surface of the second ridge (11a) are horizontal surfaces. The thickness and height of the portion of the third side wall forming portion (11) excluding the ridges (11a) are the thickness and height of the portion of the first side wall forming portion (8) excluding the ridges (8a). Are equal. The height of the second ridge (11a) of the third side wall forming portion (11) and the first ridge (8a) of the first side wall forming portion (8) are equal, and the second ridge ( The total thickness of 11a) and the first protrusion (8a) is equal to the thickness of the third and first side wall forming portions (11), (8). Therefore, the volume of the third side wall forming part (11) is equal to the volume of the first side wall forming part (8). The third side wall forming portion (11) and the first side wall forming portion (8) are brazed to each other in a state in which the front end surfaces of the third side wall forming portion (11) and the first side wall forming portion (8) face each other. That is, the tip surface of the second ridge (11a) of the third side wall forming portion (11) is abutted against the right side portion of the first ridge (8a) on the tip surface of the first side wall forming portion (8). In the state where the tip surface of the first ridge (8a) of the first side wall forming portion (8) is abutted to the left side of the second ridge (11a) on the tip surface of the third side wall forming portion (11). Both side wall forming portions (9) and (11) are brazed.

  The fourth side wall forming portion (12) is formed integrally with the left side portion of the third side wall forming portion (11) at the left edge of the lower wall (3) and protrudes toward the upper wall (2), and the tip is on the left side. Located in the middle of the height of the wall (5), the wall thickness is equal throughout. The distal end surface of the fourth side wall forming portion (12) is an inclined surface that is inclined upward toward the right. The thickness of the fourth side wall forming portion (12) is equal to the thickness of the second side wall forming portion (9), and the height of the left and right surfaces of the fourth side wall forming portion (12) is the second side wall forming portion. It is equal to the height of the right and left surfaces of the part (9). Therefore, the volume of the fourth side wall forming part (12) is equal to the volume of the second side wall forming part (9). The front end surface of the fourth side wall forming portion (12) is brazed to the first side wall forming portion (8) in a state of being in contact with the front end surface of the first side wall forming portion (8). The fourth side wall forming portion (34) is brazed to the left side surfaces of the first and third side wall forming portions (8) and (11).

  The reinforcing wall (6) is formed as a reinforcing wall forming portion (13) (14) integrally formed in a raised shape below the upper wall (2) and a reinforcing wall formed integrally in a raised shape above the lower wall (3). The portions (15) and (16) are formed by brazing the tips with each other butting each other. On the upper wall (2) and the lower wall (3), two types of reinforcing wall forming portions (13) (14) and (15) (16) having different thicknesses are alternately formed in the left-right direction, The thick reinforcing wall forming part (13) in the upper wall (2) and the thin reinforcing wall forming part (16) in the lower wall (3) are brazed, and the thick wall in the upper wall (2) The thin reinforcing wall forming part (14) and the thick reinforcing wall forming part (15) in the lower wall (3) are brazed. In the following, the thick reinforcing wall forming portions (13) and (15) of the upper and lower walls (2) and (3) are referred to as first reinforcing wall forming portions, respectively, and the thin reinforcing wall forming portions (14) and (16) are also referred to as the first reinforcing wall forming portions. Each is referred to as a second reinforcing wall forming portion. The first reinforcing wall forming portions (13) and (15) of the upper and lower walls (2) and (3) are formed on the front end surfaces thereof in the length direction and the second reinforcing walls of the other walls (3) and (2) are formed. Concave grooves (17) and (18) into which the tips of the parts (16) and (14) fit are formed over the entire length. And the front-end | tip part of the 2nd reinforcement wall formation part (16) of a lower wall (3) is in the recessed groove (17) of the 1st reinforcement wall formation part (13) of an upper wall (2), and a lower wall (3) In the state where the tip of the second reinforcing wall forming portion (14) of the upper wall (2) is press-fitted into the groove (18) of the first reinforcing wall forming portion (15), both reinforcing wall forming portions ( 13) (16) and (14) (15) are brazed. The dimensions of the first reinforcing wall forming portion (13) of the upper wall (2) and the first reinforcing wall forming portion (15) of the lower wall (3), that is, the height, the wall thickness, the concave grooves (17) and (18) The width and the depth of the concave grooves (17) and (18) are the same, and the volumes of both reinforcing wall forming portions (13) and (15) are equal. In addition, the second reinforcing wall forming portion (14) of the upper wall (2) and the second reinforcing wall forming portion (16) of the lower wall (3) have the same dimensions, that is, the height and the wall thickness. The volumes of the forming portions (14) and (16) are equal. Further, the number of first reinforcing wall forming portions (13) on the upper wall (2), the number of first reinforcing wall forming portions (15) on the lower wall (3), and the second reinforcing wall forming on the upper wall (2). The number of the parts (14) and the number of the second reinforcing wall forming parts (16) of the lower wall (3) are equal.

  The flat tube (1) is manufactured using the flat tube manufacturing plate (20) shown in FIG.

  In FIG. 3, a flat tube manufacturing plate (20) is formed by rolling a metal base plate made of an aluminum brazing sheet having a brazing filler metal layer on both sides. 2) Flat upper wall forming part (21) (flat wall forming part) and lower wall forming part (22) (flat wall forming part) having the same width and the same thickness to form (3), and upper and lower walls A connecting portion (23) that is thicker than the forming portions (21) and (22) and connects the upper and lower wall forming portions (21) and (22) together and forms the right side wall (4); and the upper wall A first side wall forming part (8) integrally formed in a raised shape on the upper surface of the right side edge of the forming part (21) and having a ridge (8a), and a right side edge of the upper wall forming part (21) A second side wall forming portion (9) integrally formed so as to protrude straight in the direction toward the upper side, and a ridge (11a) integrally formed on the upper surface of the left edge of the lower wall forming portion (22). ) Third side wall shape Part (11), a fourth side wall forming part (12) integrally formed so as to protrude straight to the left on the left edge of the lower wall forming part (22), an upper wall forming part (21) and a lower wall A plurality of first and second reinforcing wall forming portions (13) (15) and (14) (16) integrally formed in an upwardly protruding shape with a predetermined spacing in the left-right direction on the wall forming portion (22), respectively Become. The lower surface of the connecting portion (23) is flush with the lower surfaces of the upper wall forming portion (21) and the lower wall forming portion (22). The first side wall forming portion (8) of the upper wall forming portion (21), the third side wall forming portion (11) of the lower wall forming portion (22), and the first reinforcing wall forming portion (13 of the upper wall forming portion (21)). ) And the second reinforcing wall forming part (16) of the lower wall forming part (22), and the second reinforcing wall forming part (15) of the lower wall forming part (22) and the second reinforcing of the upper wall forming part (21). The wall forming portion (14) is in a position that is symmetrical with respect to the center line (O) in the left-right direction of the connecting portion (23).

  Here, in the flat tube manufacturing plate (20), the volume of both side portions (left and right side portions) in the width direction across the center line (O) in the width direction (left and right direction) of the connecting portion (23) is equal. It has become. Specifically, the volume of the width direction one side portion (24) (right side portion) sandwiching the center line (O) of the connecting portion (23) in the flat tube manufacturing plate (20) is V1, Similarly, when the volume of the other side portion 25 in the width direction (left side portion) is V2, it is preferable that the relationship of 0.97 ≦ V1 / V2 ≦ 1.03 is satisfied.

  In the above, the flat tube manufacturing plate (20) is made using a rolled base plate made of an aluminum brazing sheet provided with a brazing filler metal layer on both sides, but instead of this, an Al-Mn system It is made by rolling a rolling base plate made of an aluminum brazing sheet provided with a brazing filler metal layer on one side of an alloy core and a sacrificial corrosion layer made of an Al-Zn alloy on the other side. Also good. In this case, the first and third side wall forming portions (8) and (11) and the reinforcing wall forming portions (13), (14), (15), and (16) are integrally formed on the brazing material layer surface.

  Next, a method for manufacturing the flat tube (1) using the flat tube manufacturing plate (20) will be described with reference to FIG.

  First, the flat tube manufacturing plate (20) is sequentially bent on both the left and right sides of the connecting portion (23) by roll forming (see FIG. 4 (a)), and finally is bent into a hairpin shape. The end face of the first protrusion (8a) of the side wall forming part (8) is abutted against the end face of the third side wall forming part (11) where the second protrusion (11a) is not formed, The tip surface of the second ridge (11a) of the side wall forming portion (11) is abutted against the tip surface of the portion of the first side wall forming portion (8) where the first ridge (8a) is not formed. At the same time, the distal end portions of the second reinforcing wall forming portions (16), (14) are press-fitted into the concave grooves (17), (18) of the first reinforcing wall forming portions (13), (15).

  Next, the second side wall forming portion (9) and the fourth side wall forming portion (12) are bent so as to be along the outer surfaces of the first side wall forming portion (8) and the third side wall forming portion (11), and on both side walls. A bent body (20A) is obtained by abutting the tip surfaces of the forming portions (9) and (12) (see FIG. 4 (b)).

  Thereafter, the bent body (20A) is heated to a predetermined temperature, and the first side wall forming part (8) and the third side wall forming part (11), the second side wall forming part (9) and the fourth side wall forming part (12), The first and third side wall forming portions (8), (10), the second and fourth side wall forming portions (9), (12), and the reinforcing wall forming portions (13), (16), (14), (15) The left side wall (5) and the reinforcing wall (6) are formed by brazing the tip parts to each other using the brazing material layer, the right side wall (4) is formed by the connecting part (23), and The upper wall forming part (21) forms the upper wall (2), and the lower wall forming part (22) forms the lower wall (3). Thus, the flat tube (1) is manufactured.

  When the flat tube (1) is used in, for example, a heat exchanger (70) applied to the condenser shown in FIG. 8, the flat tube (1) is manufactured at the same time as the heat exchanger (70). That is, the heat exchanger (70) is manufactured as follows. First, a pair of aluminum header body materials having a plurality of bent bodies (20A), a plurality of bent body insertion holes, and at least an outer surface having a brazing material layer, a closing member (81), and a plurality of aluminum corrugated fins (74), a side plate (75), an inlet member (77), and an outlet member (78) are prepared. Next, a pair of header body materials are arranged at intervals, and closing members (81) are arranged at both ends of both header body materials. Also, the folded body (20A) and the fins (74) are alternately arranged, and both ends of the folded body (20A) are inserted into the folded body insertion holes of the header body material, and the corrugated fins (74) at both ends are outside. A side plate (75) is arranged on the side, and an inlet member (77) and an outlet member (78) are further arranged. Thereafter, these are heated to a predetermined temperature, and at the same time as manufacturing the flat tube (1) as described above, the header body (80) is manufactured from the header body material, and the header body (80) and the closing member ( 11) to produce header (71) (72), flat tube (1) and header (71) (72), flat tube (1) and corrugated fin (74), corrugated fin (74) and side plate ( 75), and the headers (71) and (72) and the inlet members (77) and (78) and the outlet member are brazed at the same time. Thus, the heat exchanger (70) is manufactured.

Embodiment 2
This embodiment is shown in FIGS.

  FIG. 5 shows a flat tube manufactured from the flat tube manufacturing plate of Embodiment 2, FIG. 6 shows the flat tube manufacturing plate of Embodiment 2, and FIG. 7 shows the flat tube manufacturing of FIG. A part of process which manufactures a flat tube from a plate-shaped object is shown.

  As shown in FIG. 5, the left side wall (5) of the flat tube (30) includes a first side wall forming part (31) and a second side wall forming part (32) integrally formed on the upper wall (2), The third side wall forming part (33) and the fourth side wall forming part (34) formed integrally with the lower wall (3) are combined and brazed.

  The first side wall forming portion (31) is integrally formed slightly inside the left side edge of the upper wall (2), protrudes toward the lower wall (3), and has a tip in the middle of the height of the left side wall (5). Located in the department. The front end surface of the first side wall forming portion (31) is a horizontal plane.

  The second side wall forming portion (32) is integrally formed on the left edge of the upper wall (2) so as to be spaced from the first side wall forming portion (31), protrudes toward the lower wall (3), and has a front end surface. Is located in the same plane as the lower surface of the lower wall (3).

  The third side wall forming portion (33) is integrally formed slightly inside the left side edge of the lower wall (3), protrudes toward the upper wall (2), and has a tip at the middle of the height of the left side wall (5). Located in the department. The right side portion (the inner side in the width direction of the lower wall (3)) of the distal end surface of the third side wall forming portion (33) protrudes toward the upper wall (2) and extends in the length direction, and the first side wall forming portion A thin ridge (33a) in close contact with the right side surface of (31) is integrally formed over the entire length. The left side portion of the tip surface of the third side wall forming portion (33) and the tip surface of the ridge (33a) are horizontal surfaces. The thickness of the left side portion of the third side wall forming portion (33) from the ridge (33a) is equal to the thickness of the first side wall forming portion (8). The total thickness of the protrusions (33a) of the third side wall forming portion (33) and the thickness of the first side wall forming portion (31) is equal to the total thickness of the third side wall forming portion (33). The third side wall forming portion (33) and the first side wall forming portion (31) are brazed to each other in a state in which the front end surfaces of the third side wall forming portion and the first side wall forming portion (31) are abutted. That is, the both side wall forming portions (31) (31) (the front end surface of the first side wall forming portion (8) is in contact with the left side portion of the protrusion (33a) on the front end surface of the third side wall forming portion (33)). 33) is brazed.

  The fourth side wall forming portion (34) is formed integrally with the left side portion of the third side wall forming portion (33) at the left side edge of the lower wall (3) and the right side portion of the second side wall forming portion (32). It protrudes toward the wall (2), and the tip is in contact with the lower surface of the upper wall (2). The fourth side wall forming portion (34) is brazed to the lower surface of the upper wall (2), the left side surfaces of the first and third side wall forming portions (31) and (33), and the right side surface of the second side wall forming portion (32). Has been.

  Other configurations are the same as those of the flat tube (1) of the first embodiment.

  The flat tube (20) is manufactured using a flat tube manufacturing plate (40) shown in FIG.

  In FIG. 6, the flat tube manufacturing plate (40) is formed in the same manner as the flat tube manufacturing plate (20) of the first embodiment, and is on the right side of the upper wall forming portion (21). A first side wall forming portion (31) integrally formed in an upwardly protruding shape on the upper surface of the edge portion and a second side wall formed integrally with the right side edge of the upper wall forming portion (21) so as to protrude straight to the right. Side wall forming part (32), third side wall forming part (33) integrally formed in an upward bulging shape on the upper surface of the left edge of lower wall forming part (22) and having ridges (33a), and lower wall A fourth side wall forming part (34) integrally formed to protrude straight to the left on the left edge of the forming part (22), an upper wall forming part (21), and a lower wall forming part (22), respectively It comprises a plurality of first and second reinforcing wall forming portions (13) (15) and (14) (16) which are integrally formed in an upwardly raised shape with a predetermined interval in the left-right direction. The first side wall forming portion (31) of the upper wall forming portion (21), the third side wall forming portion (33) of the lower wall forming portion (22), and the first reinforcing wall forming portion (13 of the upper wall forming portion (21)). ) And the second reinforcing wall forming part (16) of the lower wall forming part (22), and the second reinforcing wall forming part (15) of the lower wall forming part (22) and the second reinforcing of the upper wall forming part (21). The wall forming portion (14) is in a position that is symmetrical with respect to the center line (O) in the left-right direction of the connecting portion (23).

  Here, in the flat tube manufacturing plate-like body (40), the volume of both sides in the width direction (left and right side portions) across the center line (O) in the width direction (left and right direction) of the connecting portion (23) is equal. It has become. Specifically, the volume of the width direction one side part (41) (right side part) sandwiching the center line (O) of the connecting part (23) in the flat tube manufacturing plate (40) is V1, Similarly, when the volume of the other side portion (42) (left side portion) in the width direction is V2, it is preferable that the relationship of 0.97 ≦ V1 / V2 ≦ 1.03 is satisfied.

  In the production of the flat tube (30), first, the plate-like body (41) for producing the flat tube is sequentially bent on the left and right sides of the connecting portion (23) by a roll forming method (see FIG. 7 (a)), Finally, it is bent into a hairpin shape, and the tip of the first side wall forming portion (31) is butted against the portion of the tip surface of the third side wall forming portion (33) where the protrusion (33a) is not formed. Next, the fourth side wall forming portion (34) is bent so as to be along the outer surfaces of the first and third side wall forming portions (31) and (33), and the tip thereof is brought into contact with the upper wall forming portion (21). . Next, the second side wall forming portion (32) is bent and is fitted along the outer surface of the fourth side wall forming portion (34) to obtain a bent body (40A) (see FIG. 7 (b)).

  Thereafter, the bent body (40A) is heated to a predetermined temperature, and the first side wall forming part (31), the third side wall forming part (33), the second side wall forming part (32), and the fourth side wall forming part (34). The fourth side wall forming portion (34) and the first and third side wall forming portions (31) and (33), and the fourth side wall forming portion (34) and the upper wall forming portion (21) are formed into a plate-like body for flat tube manufacturing. The left side wall (5) is formed by brazing each other using the brazing material layer existing on the surface of (40). In this way, a flat tube (30) is manufactured.

  The flat tube in the second embodiment (in the description of the method for manufacturing 30 is not described the method for forming the reinforcing wall (6), but is the same as in the first embodiment).

  Moreover, in the said Embodiment 2, when a flat tube (30) is used for the heat exchanger (70) applied, for example to the capacitor | condenser shown in FIG. 8, manufacture of a flat tube (30) is the case of Embodiment 1. In the same way as in the production of the heat exchanger (70).

  A heat exchanger provided with a flat tube manufactured using the flat tube manufacturing plate of Embodiments 1 and 2 described above uses a chlorofluorocarbon refrigerant, and has a refrigeration cycle having a compressor, a condenser, and an evaporator. In a vehicle mounted as a car air conditioner, for example, an automobile, it is used as a condenser for the refrigeration cycle. Moreover, it is used as an evaporator of the refrigeration cycle. Furthermore, it may be mounted on an automobile as an oil cooler or a radiator provided with the above-described flat tube.

In addition, the flat tube manufactured using the flat tube manufacturing plate of Embodiments 1 and 2 described above uses a supercritical refrigerant such as a CO ₂ refrigerant, and includes a compressor, a gas cooler, an evaporator, a decompressor, And a supercritical refrigeration cycle having an intermediate heat exchanger for exchanging heat between the refrigerant coming out of the gas cooler and the refrigerant coming out of the evaporator is used for a gas cooler or an evaporator in a vehicle mounted as a car air conditioner, for example, an automobile. Sometimes.

It is a cross-sectional view which shows the flat tube manufactured using the plate-shaped object for flat tube manufacture of Embodiment 1 of this invention. It is the elements on larger scale of FIG. It is a front view which shows the flat body for flat tube manufacture of Embodiment 1 of this invention. It is a figure which shows a part of process of manufacturing the flat tube shown in FIG. 1 using the flat body for flat tube manufacture shown in FIG. It is a figure equivalent to FIG. 2 which shows the flat tube manufactured using the flat body for flat tube manufacture of Embodiment 2 of this invention. It is a front view which shows the plate-shaped object for flat tube manufacture of Embodiment 2 of this invention. It is a figure which shows a part of process of manufacturing the flat tube shown in FIG. 5 using the flat body for flat tube manufacture shown in FIG. It is a perspective view which shows the heat exchanger applied to the capacitor | condenser for car air conditioners.

(1) (30): Flat tube
(2): Upper wall
(3): Lower wall
(4): Right side wall
(5): Left wall
(6): Reinforcement wall
(8): 1st side wall formation part
(8a): First ridge
(9): Second side wall forming part
(11): Third side wall forming part
(11a): Second ridge
(12): Fourth side wall forming part
(13) (14) (15) (16): Reinforcing wall forming part
(20) (40): Plate for flat tube manufacturing
(21): Upper wall forming part (flat wall forming part)
(22): Lower wall forming part (flat wall forming part)
(23): Connection part
(31): First side wall forming part
(32): Second side wall forming part
(33): Third side wall forming part
(33a): Projection
(34): Fourth side wall forming part

Claims (10)

A pair of flat walls facing each other and two side walls provided across both side edges of both flat walls are provided, and one side wall is formed integrally with both flat walls to form a single structure. For manufacturing a flat tube for manufacturing a flat tube having a multiple structure, the other side wall being formed by combining a plurality of side wall forming parts integrally formed on the side edges of both flat walls. A plate-like body,
The whole comprises a single rolled plate formed by rolling a metal base plate, and connects two flat wall forming portions and both flat wall forming portions together to form one side wall. A connecting portion, and a plurality of side wall forming portions that are provided on the outer edge portion on the opposite side of the connecting portion in both flat wall forming portions to form the other side wall, and the center line in the width direction of the connecting portion is The volume on both sides of the sandwiched width is equal ,
A first side wall forming portion is formed on the outer edge of the first flat wall forming portion opposite to the connecting portion so as to protrude from the first flat wall forming portion. A second side wall forming portion that is connected straightly and extends outward is formed, and the second flat wall forming portion has a second side wall forming portion that protrudes from the second flat wall forming portion on the outer edge opposite to the connecting portion. 3 side wall forming portions are formed, and a fourth side wall forming portion extending straight outwardly and continuously with the second flat wall forming portion is formed, and the first side wall forming portion and the third side wall forming portion are connected to each other. The second side wall forming portion and the fourth side wall forming portion are formed at positions that are symmetrical with respect to the center line in the width direction of the portion, and are shaped so that the front end surfaces of the side wall forming portions abut each other. And the shape of the tip faces of each other Flat tube for manufacturing the plate-like body being. The first side wall forming portion and the third side wall forming portion have the same thickness, and the first side wall forming portion has a thin wall extending in the length direction on the outer side in the width direction of the first flat wall forming portion at the front end surface of the first side wall forming portion. One ridge is formed over the entire length, and a thin second ridge extending in the length direction is formed over the entire length on the inner side in the width direction of the second flat wall forming portion on the tip surface of the third side wall forming portion. The heights of the ridges and the second ridges are equal, and the total thickness of the first ridges and the thickness of the second ridges is the thickness of the first side wall forming part and the third side wall forming part. The plate for manufacturing a flat tube according to claim 1, which is equal to: A pair of flat walls facing each other and two side walls provided across both side edges of both flat walls are provided, and one side wall is formed integrally with both flat walls to form a single structure. For manufacturing a flat tube for manufacturing a flat tube having a multiple structure, the other side wall being formed by combining a plurality of side wall forming parts integrally formed on the side edges of both flat walls. A plate-like body,
The whole comprises a single rolled plate formed by rolling a metal base plate, and connects two flat wall forming portions and both flat wall forming portions together to form one side wall. A connecting portion, and a plurality of side wall forming portions that are provided on the outer edge portion on the opposite side of the connecting portion in both flat wall forming portions to form the other side wall, and the center line in the width direction of the connecting portion is The volume on both sides of the sandwiched width is equal,
A first side wall forming portion is formed on the outer edge of the first flat wall forming portion opposite to the connecting portion so as to protrude from the first flat wall forming portion. A second side wall forming portion that is connected straightly and extends outward is formed, and the second flat wall forming portion has a second side wall forming portion that protrudes from the second flat wall forming portion on the outer edge opposite to the connecting portion. 3 side wall forming portions are formed, and a fourth side wall forming portion that extends straight outwardly from the second flat wall forming portion is formed, and the thickness of the first side wall forming portion is the third side wall forming portion. The first side wall forming portion and the third side wall forming portion are formed at positions symmetrical with respect to the center line in the width direction of the connecting portion, and the width of the second side wall forming portion is the first thickness. 4. A plate for producing a flat tube that is wider than the width of the side wall forming part . A thin ridge extending in the length direction is formed on the inner side in the width direction of the first flat wall forming portion on the tip surface of the third side wall forming portion, and the thickness of the ridge and the thickness of the first side wall forming portion are increased. The plate for manufacturing a flat tube according to claim 3, wherein the total thickness is equal to the thickness of the third side wall forming portion . When the volume of one side in the width direction across the center line in the width direction of the connecting portion is V1, and the volume of the other side in the width direction is V2, the relationship of 0.97 ≦ V1 / V2 ≦ 1.03 is satisfied. Item 5. A plate for producing a flat tube according to any one of Items 1 to 4. The flat tube manufacturing plate-like body according to any one of claims 1 to 5, wherein the thicknesses of both flat wall forming portions are equal . A plurality of reinforcing wall forming portions are integrally formed in a raised shape on both flat wall forming portions, and the total volume of all the reinforcing wall forming portions of one flat wall forming portion and the total reinforcement of the other flat wall forming portion. The total volume of the wall forming portions is equal, and the reinforcing wall forming portion of one flat wall forming portion and the reinforcing wall forming portion of the other flat wall forming portion are symmetrical with respect to the center line in the width direction of the connecting portion. The plate for manufacturing a flat tube according to any one of claims 1 to 6, wherein the plate is in a position. A pair of flat walls facing each other and two side walls provided across both side edges of both flat walls are provided, and one side wall is formed integrally with both flat walls to form a single structure. And the other side wall is a flat tube that is formed by combining a plurality of side wall forming parts integrally formed on the side edges of both flat walls and has a multiple structure,
The flat tube-producing plate-like body according to claim 1 or 2 is bent into a hairpin shape at the connecting portion, the front end surfaces of the first side wall forming portion and the third side wall forming portion are butted together, and the second side wall forming portion and A flat tube in which a bent body is obtained by bending the fourth side wall forming portion and butting the end surfaces, and a side wall having a multiple structure is formed by brazing all the side wall forming portions of the bent body . A pair of flat walls facing each other and two side walls provided across both side edges of both flat walls are provided, and one side wall is formed integrally with both flat walls to form a single structure. And the other side wall is a flat tube that is formed by combining a plurality of side wall forming parts integrally formed on the side edges of both flat walls and has a multiple structure,
The claim 3 or 4 flat tube for producing plate-like body according, Rutotomoni bent like a hairpin at the connecting portion, abutting the distal end face each other of the first side wall forming portions and the third side wall forming portion, further fourth sidewall forming section A flat tube in which the second side wall forming part is bent after bending to obtain a bent body, and multiple side walls are formed by brazing all the side wall forming parts of the bent body. A plurality of flat tubes according to claim 8 or 9 are arranged in parallel with each other between a pair of headers spaced from each other, and both ends of all the flat tubes are both headers. A heat exchanger in which fins are disposed in a ventilation gap between adjacent flat tubes and brazed to the flat tubes .

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