JP2014149137A - Flat heat exchange tube and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat heat exchange tube capable of suppressing occurrence of a soldering defect through a simple working operation.SOLUTION: A flat heat exchange tube 4 includes: a pair of flat walls 13, 14; two side walls 15; a reinforcing member 16 provided inside both the side walls 15; and a corrugated partition member 18 partitioning an internal space into a plurality of refrigerant passages 17 extending along a length of the tube. The partition member 18 have a plurality of partition walls 22 which extend along the length of the tube and are provided side by side along a width of the tube, and also mutually partition off adjacent refrigerant passages 17. One tube-height-directional end part of the reinforcing member 16 connects with one tube-height-directional end part of a partition wall 22 at the end of the partition member 18 on the side of the reinforcing member. The other tube-height-directional end part of the reinforcing member 16 is provided integrally with an extension part 24 which extends toward the side wall 15 on the opposite side from the side wall 15 provided with the reinforcing member 16, and a tip part of the extension part 24 is made to abut on the partition wall 22 at a reinforcing-member-side end part of the partition member 18.

Description

  The present invention relates to a flat heat exchange pipe used for, for example, a condenser and evaporator of a refrigeration cycle constituting a car air conditioner, an outdoor heat exchanger and an indoor heat exchanger of a heat pump refrigeration cycle, and a method for manufacturing the same.

  For example, as a flat heat exchange pipe used for a condenser of a refrigeration cycle constituting a car air conditioner, it has a pair of flat walls facing each other and two side walls provided between both side edges of both flat walls. In order to prevent the side wall from being damaged by stepping stones or the like, a member provided with a reinforcing member inside each side wall is used.

  For the purpose of preventing damage to the side wall due to stepping stones, etc., as one specific example of the flat heat exchange pipe provided with reinforcing members inside the side walls, a pair of flat walls facing each other, Two side walls provided between both side edges of both flat walls, and a wave-like partition member that partitions the internal space into a plurality of refrigerant passages extending in the tube length direction. It is formed integrally, and both side walls have a flat shape extending in the tube height direction, and one side wall is integrally provided between one side edge of one flat wall and one side edge of the other flat wall, The other side wall is integrally provided on the other side edge of one flat wall, and a flat reinforcing member extending in the tube height direction is integrally provided on the side edge of the other side wall on the other side wall side. The partition member is connected to the tip of the reinforcing member A flat reinforcing member that is integrally formed so as to project to the side wall side and extends in the tube height direction is integrally provided on the side edge of the one side wall side of the partition member, and both side walls and both reinforcing members are provided. Are partitioned and brazed so as to be in close contact with each other, and the partition member is wave-shaped, extends in the tube length direction and is arranged in the tube width direction, and separates the refrigerant passages adjacent to each other. And a connecting portion that connects adjacent partition walls and is joined to the inner surfaces of both flat walls, and the connecting portion on one side of the partition member in the tube height direction is brazed to the one flat wall. In addition, a flat heat exchange tube is also known in which the other connecting portion is brazed to the other flat wall (see Patent Document 1).

  And the flat heat exchange pipe | tube of the patent document 1 arrange | positioned in parallel with the space | interval and the width direction toward the ventilation direction, the header tank to which the both ends of the heat exchange pipe were brazed, and adjacent heat A heat exchanger is constituted by outer fins arranged between the exchange tubes and brazed to the heat exchange tubes.

  The heat exchanger mentioned above is manufactured by the following method. That is, both the side walls and the reinforcing members of the flat heat exchange pipe, the bent body in a state where the connecting portions of the flat walls and the partition member are not brazed, and the outer fin are combined, and both ends of the bent body are After being inserted into the tube insertion holes of the tank structure constituting the two header tanks, the both side walls of the bent body and both reinforcing members, and both the flat walls and both connecting portions of the partition members are brazed, respectively, to heat exchange tubes At the same time, the heat exchanger is manufactured by brazing the heat exchange pipe and the outer fin and the heat exchange pipe and the header tank structure.

  However, when the heat exchanger provided with the flat heat exchange tube described in Patent Document 1 is handled in the state of the folded body, the folded body is deformed, and between the side walls and the two reinforcing members in the folded body. There is a possibility that a gap is generated, and a brazing failure may occur between the side walls and the reinforcing members during brazing in a subsequent process.

  Further, as another specific example of the flat heat exchange pipe in which reinforcing members are provided inside the both side walls for the purpose of preventing breakage of the side wall due to stepping stones or the like, a pair of flat walls facing each other And two side walls provided between both side edges of the two flat walls, and a wave-like partition member that divides the internal space into a plurality of refrigerant passages extending in the tube length direction. It is integrally formed as a whole, and both side walls are arc-shaped in cross section with the center in the tube height direction protruding outward in the tube width direction, and one side edge of one flat wall and one side edge of the other flat wall One side wall is integrally provided between the other flat wall and the other side wall is integrally provided on the other side edge of the one flat wall, and a tube is provided on the side edge of the other flat wall on the other side wall side. Reinforcement with a circular arc cross-section with the center in the height direction protruding outward in the tube width direction And the partition member is integrally formed so as to extend to the one side wall side of the reinforcing member and at the side edge of the one side wall side of the partition member. A reinforcing member having an arc shape with a transverse cross section projecting outward in the tube width direction is integrally provided, and both side walls and both reinforcing members are laminated and brazed so as to be in close contact with each other in a laminated manner, The partition members are wavy and extend in the tube length direction and are arranged side by side in the tube width direction. The partition walls separating adjacent refrigerant passages are connected to each other, and the inner surfaces of both flat walls are connected to each other. There is known a flat heat exchange tube having a connecting portion joined to each other, and the connecting portion of the partition member being brazed to both flat walls (see Patent Document 2).

  According to the flat heat exchange tube described in Patent Document 2, in order to prevent the problems of the flat heat exchange tube described in Patent Document 1, the side walls and both reinforcing members are used when the bent body is formed. There is a problem that it is necessary to mold with high dimensional accuracy, and the processing work becomes troublesome.

JP 2009-168360 A JP 2009-229052 A

  An object of the present invention is to provide a flat heat exchange tube that can solve the above-described problems and suppress the occurrence of brazing defects with a simple processing operation, 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 flat walls facing each other, two side walls provided between both side edges of both flat walls, and a reinforcing member provided inside at least one of the side walls A corrugated partition member that partitions the internal space into a plurality of refrigerant passages extending in the tube length direction, the partition members extending in the tube length direction and arranged side by side in the tube width direction, and adjacent refrigerant passages In a flat heat exchange pipe having a plurality of partition walls separating the adjacent partition walls alternately at both ends in the pipe height direction and having a connecting portion joined to the inner surfaces of both flat walls,
One end of the reinforcing member in the tube height direction is connected to one end in the tube height direction of the partition wall at the reinforcing member side end of the partition member, and the other end of the reinforcing member in the tube height direction is reinforced. A flat heat exchange in which an extending portion extending integrally to the side wall opposite to the side wall on which the member is provided is integrally provided, and the leading end of the extending portion is in contact with the partition wall at the reinforcing member side end of the partition member tube.

  2) The flat heat exchange tube according to 1), wherein the reinforcing member covers the inner surface of the side wall, and at least a part of the extending portion covers a part of the inner surface of one flat wall.

  3) The flat heat exchange tube as described in 2) above, wherein the entire extending portion covers a part of the inner surface of the one flat wall.

  4) A bent portion that is bent toward the center in the tube height direction is provided in a portion near the tip of the extending portion, and the tip of the bent portion contacts the partition wall at the reinforcing member side end of the partition member, 2. The flat heat exchange tube as described in 2) above, wherein the entire portion excluding the bent portion in the extending portion covers a part of the inner surface of the one flat wall.

  5) The flat heat exchange tube according to any one of the above 2) to 4), wherein a covering portion that covers the inner surface of the other flat wall is provided between the reinforcing member and the partition wall of the partition member. .

  6) The entire one flat wall is integrally formed, and the other flat wall is formed by two dividing walls arranged in the tube width direction, and both side edges and both dividing walls of the one flat wall are formed. Side walls are respectively provided between the outer edges of the tube width direction in the tube, reinforcing members are provided on the inner sides of the both side walls, and project at the inner edge portions of the two divided walls toward the one flat wall side. The projecting wall joined to the flat wall is integrally formed with the tip abutting against the one flat wall, and the projecting walls are joined together, and the partition member is connected to the tips of the projecting walls. The flattening according to any one of 1) to 5) above, wherein the reinforcing member is integrally formed on the outer edge of the partition member in the tube width direction. Heat exchanger tube.

  7) A plurality of flat heat exchange pipes that are spaced apart from each other and arranged in parallel in the width direction in the ventilation direction, a header tank to which both ends of the heat exchange pipe are connected, and adjacent heat exchange pipes And a heat exchanger comprising the flat heat exchange tube according to any one of 1) to 6) above.

8) A pair of flat walls facing each other, two side walls provided between both side edges of both flat walls, and an inner surface of the side wall provided inside at least one of the side walls. A reinforcing member for covering, and a wave-like partitioning member for partitioning the internal space into a plurality of refrigerant passages extending in the tube length direction,
One flat wall is formed as a whole, and the other flat wall is formed by two divided walls arranged in the tube width direction. Both side edges of the one flat wall and the tube width direction in both divided walls Side walls are provided between the outer edge portions and reinforcing members are provided on the inner sides of both side walls, respectively. A projecting wall joined to the flat wall in a state of being in contact with one of the flat walls is integrally formed and the projecting walls are joined to each other. A plurality of partition walls, which are integrally formed so as to project outward, are provided in parallel in the tube width direction and extend in the tube length direction, and separate adjacent refrigerant passages, and adjacent partition walls Connected alternately at both ends in the tube height direction And has a connecting portion which is joined to both the flat wall inner surface,
One end of the reinforcing member in the tube height direction is connected to one end in the tube height direction of the partition wall at the reinforcing member side end of the partition member, and the other end of the reinforcing member in the tube height direction is reinforced. The extending portion extending to the side wall opposite to the side wall on which the member is provided is integrally provided, and the entire extending portion covers a part of the inner surface of one flat wall, and the leading end of the extending portion is a partition. A method for producing a flat heat exchange tube that is in contact with a partition wall at a reinforcing member side end of a member,
One flat wall forming part that forms the one flat wall, two side wall forming parts that are provided on both side edges of the flat wall forming part and that form side walls, and opposite to the flat wall forming part in both side wall forming parts Two dividing wall forming portions provided on the side edge and forming the dividing wall of the other flat wall, 2 provided on the side edge opposite to the side wall forming portion in both dividing wall forming portions and forming a protruding wall Two partition wall forming portions, two partition member forming portions provided on a side edge opposite to the partition wall forming portion in both the projecting wall forming portions and forming a partition member, and a projecting wall forming portion in both partition member forming portions; Are provided on the side edge on the opposite side and form the reinforcing member, and on the side edge opposite to the partition member forming part in both the reinforcing member forming parts and stretched to form the stretched part Prepare one metal base plate with part forming part The partition member forming portion of the metal base plate is provided with a connecting portion that connects the plurality of partition walls and the adjacent partition walls, and the reinforcing member forming portion of the metal base plate is partitioned at the end of the partition member forming portion. The reinforcing member and the extending portion are formed by bending the extending portion forming portion with respect to the reinforcing member forming portion while bending with respect to the wall, and the leading end portion of the extending portion is used as a partition wall at the reinforcing member side end portion of the partition member. Next, the partition member forming portion of the metal base plate is bent with respect to the protruding wall forming portion, and the protruding wall forming portion is bent with respect to the dividing wall forming portion, thereby dividing the connecting portion on one side of the partition member forming portion. The connecting portion on the other side of the partition member forming portion is made flat by contacting the wall forming portion and then bending the dividing wall forming portion with respect to the side wall forming portion and bending the side wall forming portion with respect to the flat wall forming portion. When it makes contact with the forming part The bent body comprising one flat wall, the other flat wall composed of two divided walls, both side walls, both projecting walls, a partition member, a reinforcing member and an extending portion is obtained by bringing the projecting wall forming portions into surface contact with each other. After that, the two protruding walls, the connecting portion of the partition member and both flat walls, the reinforcing member and both side walls, the extending portion and one of the flat walls, and the partitioning of the leading end portion of the extending portion and the reinforcing member side end portion of the partitioning member A method for producing a flat heat exchange tube, including brazing a wall.

9) A pair of flat walls facing each other, two side walls provided between both side edges of both flat walls, and an inner surface of the side wall provided inside at least one of the side walls. A reinforcing member for covering, and a wave-like partition member for partitioning the internal space into a plurality of refrigerant passages extending in the pipe length direction,
One flat wall is formed as a whole, and the other flat wall is formed by two divided walls arranged in the tube width direction. Both side edges of the one flat wall and the tube width direction in both divided walls Side walls are provided between the outer edge portions and reinforcing members are provided on the inner sides of both side walls, respectively. A projecting wall joined to the flat wall in a state of being in contact with one of the flat walls is integrally formed and the projecting walls are joined to each other. A plurality of partition walls, which are integrally formed so as to project outward, are provided in parallel in the tube width direction and extend in the tube length direction, and separate adjacent refrigerant passages, and adjacent partition walls Connected alternately at both ends in the tube height direction And has a connecting portion which is joined to both the flat wall inner surface,
One end of the reinforcing member in the tube height direction is connected to one end in the tube height direction of the partition wall at the reinforcing member side end of the partition member, and the other end of the reinforcing member in the tube height direction is reinforced. An extending portion extending integrally to the side wall opposite to the side wall provided with the member is integrally provided, and a bent portion bent toward the central portion in the tube height direction is provided at a portion near the tip of the extending portion, The flat heat in which the tip of the bent portion abuts against the partition wall at the reinforcing member side end of the partition member, and the entire portion excluding the bent portion in the extending portion covers a part of the inner surface of one flat wall. A method of manufacturing an exchange tube,
One flat wall forming part that forms the one flat wall, two side wall forming parts that are provided on both side edges of the flat wall forming part and that form side walls, and opposite to the flat wall forming part in both side wall forming parts Two dividing wall forming portions provided on the side edge and forming the dividing wall of the other flat wall, 2 provided on the side edge opposite to the side wall forming portion in both dividing wall forming portions and forming a protruding wall Two partition wall forming portions, two partition member forming portions provided on a side edge opposite to the partition wall forming portion in both the projecting wall forming portions and forming a partition member, and a projecting wall forming portion in both partition member forming portions; Are provided on the side edge on the opposite side and form the reinforcing member, and on the side edge opposite to the partition member forming part in both the reinforcing member forming parts and stretched to form the stretched part Prepare one metal base plate with part forming part The partition member forming portion of the metal base plate is provided with a connecting portion that connects the plurality of partition walls and the adjacent partition walls, and the reinforcing member forming portion of the metal base plate is partitioned at the end of the partition member forming portion. Bending with respect to the wall and bending the stretched portion forming portion with respect to the reinforcing member forming portion, and further bending the portion near the tip of the stretched portion to form a stretched portion having a reinforcing member and a bent portion. By bringing the front end of the bent portion into contact with the partition wall at the reinforcing member side end of the partition member, the thickness of the metal base plate in the thickness direction of the flat heat exchange tube to be manufactured is set at both ends of the metal base plate. A cylindrical portion larger than the distance between the inner surfaces of both flat walls is formed, and then the partition member forming portion of the metal base plate is bent with respect to the protruding wall forming portion and the protruding wall forming portion is bent with respect to the divided wall forming portion. One side of the partition member forming part The connecting part is brought into contact with the dividing wall forming part, and then the dividing wall forming part is bent with respect to the side wall forming part and the side wall forming part is bent with respect to the flat wall forming part, thereby connecting the other side of the partition member forming part. The flat wall forming part is brought into contact with each other, the projecting wall forming parts are brought into surface contact with each other, and the cylindrical part is deformed, whereby one flat wall, the other flat wall composed of two divided walls, both side walls A bent body composed of extending portions having both protruding walls, partitioning members, reinforcing members and bent portions, and thereafter, the protruding walls, the connecting portions of the partitioning members and the flat walls, the reinforcing members and the side walls, and the extending portions; A method for producing a flat heat exchange tube, comprising brazing one flat wall and a distal end portion of a bent portion of an extending portion and a partition wall at a reinforcing member side end portion of the partition member.

  According to the flat heat exchange tubes of 1) to 6) above, they are provided inside at least one of the two side walls provided between both side edges of the pair of flat walls facing each other. One end of the reinforcing member in the tube height direction is connected to one end in the tube height direction of the partition wall at the reinforcing member side end of the partition member, and the other end of the reinforcing member in the tube height direction The extending portion extending to the side wall opposite to the side wall provided with the reinforcing member is integrally provided, and the leading end of the extending portion is in contact with the partition wall of the reinforcing member side end portion of the partition member. When the flat heat exchange tube is manufactured, in the state of the bent body formed by bending the metal base plate and before each part is brazed, the extending portion is stretched against the partition wall of the partition member, so that the reinforcing member is moved to the side wall side. It will be pressed. Therefore, when the bent body is handled, the reinforcing member is separated from the inner surface of the side wall by an external force applied to the bent body, and the side wall and the reinforcing member are securely brazed at the time of brazing in a subsequent process. Moreover, since the front-end | tip part of an extending | stretching part is only contact | abutting to the partition wall of a partition member, like the heat exchange pipe | tube of patent document 2, the whole inner surface of a side wall and the outer surface of a reinforcement member are closely_contact | adhered. Compared with the case, the operation | work which shape | molds the bending body of the state before brazing a required part becomes easy.

  According to the flat heat exchange tubes of 2) to 4) above, the reinforcing member covers the inner surface of the side wall, and at least a part of the extending portion covers a part of the inner surface of one flat wall. The strength of the side wall covered with the reinforcing member and the strength of the portion where the inner surface of the flat wall is covered with the extending portion are improved, and damage to the parts where these strengths are improved by flying objects such as flying stones can be prevented. it can.

  According to the flat heat exchange pipe of the above 5), since the covering portion that covers the inner surface of the other flat wall is provided between the reinforcing member and the partition wall of the partition member, the inner surface of the other flat wall is The strength of the portion covered with the covering portion is improved, and the damage of the portion with improved strength due to flying objects such as flying stones can be prevented.

  According to the flat heat exchange tube of 6) above, in the state of the bent body formed by bending the metal base plate and before each part is brazed, the extending portion stretches against the partition wall of the partition member, and the partition member Is stretched against the protruding wall, and both reinforcing members are effectively pressed against the side wall.

  According to the method for producing a flat heat exchange pipe of 8) and 9) above, in the state of the bent body before each part is brazed, the extending part is stretched against the partition wall of the partition member, and the partition member is a protruding wall. Thus, both reinforcing members are pressed against both side walls. Therefore, when the bent body is handled, the reinforcing member is separated from the inner surface of the side wall by an external force applied to the bent body, and the side wall and the reinforcing member are securely brazed at the time of brazing in a subsequent process. Moreover, since the front-end | tip part of an extending | stretching part is only contact | abutting to the partition wall of a partition member, like the heat exchange pipe | tube of patent document 2, the whole inner surface of a side wall and the outer surface of a reinforcement member are closely_contact | adhered. Compared with the case, the operation | work which shape | molds the bending body of the state before brazing a required part becomes easy.

It is a perspective view which shows the whole structure of the capacitor | condenser for car air conditioners provided with the flat heat exchange pipe | tube by this invention. It is an AA line expanded sectional view of FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is a figure which shows the one part process of the method of manufacturing the flat heat exchange tube shown in FIG. 2 and FIG. It is a figure equivalent to FIG. 3 which shows other embodiment of the flat heat exchange pipe | tube by this invention. It is a figure which shows the one part process of the method of manufacturing the flat heat exchange pipe | tube shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the flat heat exchange tube according to the present invention is used for a condenser of a car air conditioner using a chlorofluorocarbon refrigerant.

  FIG. 1 shows the overall configuration of a car air conditioner capacitor to which a heat exchanger according to the present invention is applied, and FIGS. 2 and 3 show the configuration of a flat heat exchange tube used in the capacitor of FIG. FIG. 4 shows some steps of the method of manufacturing the flat heat exchange tube shown in FIGS.

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 and 2) is the front and the opposite side is the rear, and the downstream side is viewed from the upstream side in the ventilation direction. The top and bottom and left and right (up and down, left and right in FIG. 1) are referred to as top and bottom and left and right. In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  In FIG. 1, a capacitor (1) for a car air conditioner is composed of a pair of aluminum header tanks (2) (3) arranged at intervals in the left-right direction with the longitudinal direction facing up and down, Between the header tanks (2) and (3), the width direction is directed in the ventilation direction (front-rear direction) and spaced apart in the vertical direction, and both ends are brazed to both header tanks (2) and (3). A plurality of flat aluminum heat exchange pipes (4) and adjacent heat exchange pipes (4) and between the upper and lower heat exchange pipes (4) are placed on the heat exchange pipe (4). An aluminum corrugated outer fin (5) attached and an aluminum side plate (6) brazed to the outer fin (5) disposed outside the upper and lower outer fins (5). .

  The left header tank (2) is divided into two upper and lower header parts (2a) and (2b) by a partition member (7) above the central part in the height direction, and the right header tank (3) is The upper and lower header parts (3a) and (3b) are partitioned by a partition member (7) below the central part. A fluid inlet (not shown) is formed in the upper header portion (2a) of the left header tank (2), and an aluminum inlet member (8) having an inflow passage (8a) leading to the fluid inlet is formed in the upper header portion (2a). It is brazed. Also, a fluid outlet (not shown) is formed in the lower header portion (3b) of the right header tank (3), and an aluminum outlet member (9) having an outflow passage (9a) leading to the fluid outlet is provided in the lower header portion (3b ) Is brazed.

  The left and right header tanks (2) and (3) are made of an aluminum pipe having a brazing filler metal layer on at least the outer surface, for example, a base plate made of an aluminum brazing sheet having a brazing filler metal layer on both sides is formed into a cylindrical shape, and both side edges The tank body (11) is composed of a cylindrical body that is partially overlapped and brazed to each other and has a plurality of long tube insertion holes in the front-rear direction, and brazed to both ends of the tank body (11). It consists of an aluminum closing member (12) for closing the opening at both ends. Detailed illustration of the header tank body (11) is omitted. Further, the header tank body (11) may be made of an aluminum extruded tube having a brazing material sprayed on the outer peripheral surface.

  As shown in FIG. 2, the flat heat exchange pipe (4) is composed of a pair of flat walls (13) (14) facing each other at an interval in the vertical direction and both flat walls (13) (14). Two side walls (15) provided between the front and rear side edges, reinforcing members (16) provided inside the side walls (15), and a flat heat exchange pipe (4) And a corrugated partition member (18) for partitioning the internal space into a plurality of refrigerant passages (17) extending in the pipe length direction, and folding the aluminum brazing sheet having a brazing filler metal layer on both sides as a necessary part. It is formed by brazing. The reinforcing member (16) covers the inner surface of the side wall (15) and is brazed to the inner surface of the side wall (15).

  The lower flat wall (13) of the flat heat exchange pipe (4) is formed as a whole, and the upper flat wall (14) is formed of two divided walls (19) aligned in the pipe width direction (front-rear direction). Has been. Between the front and rear side edges of the lower flat wall (13) and the outer edges of the split walls (19) in the pipe width direction, each extends in the pipe height direction (vertical direction) and the cross-sectional shape is outside the front and rear direction. A side wall (15) having an arc shape protruding in the direction is provided.

  On the inner edge of the upper flat wall (14) of the flat heat exchange pipe (4) on both inner walls in the tube width direction, the lower flat wall (13) protrudes toward the lower flat wall (13) and the lower flat wall ( A projecting wall (21) brazed to the lower flat wall (13) in a state in contact with 13) is integrally formed, and both projecting walls (21) are brazed to each other. A partition member (18) is integrally formed at the tip of the protruding wall (21) so as to protrude outward in the tube width direction.

  The partition member (18) extends in the tube length direction (left-right direction) and is arranged side by side in the tube width direction (front-rear direction), and a plurality of partition walls (22) separating adjacent refrigerant passages (17); The partition walls (22) adjacent to each other in the tube width direction are connected alternately at both ends in the tube height direction (up and down direction), and the cross-section arc shape is brazed to the inner surfaces of both flat walls (13) (14) It consists of a connection part (23). And, the reinforcing member (16) is integrally formed so as to be connected to one end portion in the tube height direction of the partition wall (22) at the outer end portion in the tube width direction in each partition member (18). The upper end portion that is one end portion in the tube height direction of the reinforcing member (16) is connected to the upper end portion that is one end portion in the tube height direction of the partition wall (22) at the end portion in the tube width direction.

  As shown in FIG. 3, the side wall (15) opposite to the side wall (15) provided with the reinforcing member (16) at the lower end which is the other end in the tube height direction of the reinforcing member (16). That is, the front reinforcing member (16) is integrally provided with the extending portion (24) extending rearward, and the rear reinforcing member (16) is integrally extending frontward. The distal end of the extending portion (24) is brazed to the partition wall (22) in contact with the partition wall (22) at the end of the partition member (18) on the reinforcement member (16) side. The extending portion (24) is flat as a whole, and the entire extending portion (24) is brazed to the lower flat wall (13) in a state of covering a part of the inner surface of the lower flat wall (13). . Further, the flat surface brazed to the upper flat wall (14) with the inner surface of the upper flat wall (14) covered between the upper end portion of the reinforcing member (16) and the upper end portion of the partition wall (22). A covering portion (25) is provided.

  The flat heat exchange tube (4) is manufactured by the method shown in FIG.

  First, a metal base plate (30) made of an aluminum brazing sheet having a brazing filler metal layer on both sides is prepared. The metal base plate (30) is provided with a flat wall forming part (31) that forms the lower flat wall (13) and two side walls that are provided on both side edges of the flat wall forming part (31) and that form the side walls (15). Forming part (32), two divisions which are provided on the side edge opposite to the flat wall forming part (31) in both side wall forming parts (32) and form the dividing wall (19) of the upper flat wall (14) Two protruding wall forming portions (34) provided on the side edge opposite to the side wall forming portion (32) in both the wall forming portion (33) and the divided wall forming portion (33) and forming the protruding wall (21) Two partition member forming portions (35) provided on the side edge opposite to the partition wall forming portion (33) in both protruding wall forming portions (34) and forming the partition member (18), both partition member forming A covering portion forming portion (36) provided on a side edge of the portion (35) opposite to the protruding wall forming portion (34) and forming the covering portion (25), and a partition member in both covering portion forming portions (36) The reinforcing member (16) is provided on the side edge opposite to the forming portion (35). Two reinforcing member forming portions (37) formed, and an extending portion provided on the side edge opposite to the covering portion forming portion (36) in both reinforcing member forming portions (37) and forming the extending portion (24) It has a formation part (38). Then, the partition member forming portion (35) of the metal base plate (30) is provided with a plurality of partition walls (22) and a connecting portion (23) for connecting adjacent partition walls (22) (FIG. 4). (See (a)).

  Next, the reinforcing member forming portion (37) of the metal base plate (30) is bent with respect to the covering portion forming portion (36) (see FIG. 4 (b)), and the stretched portion forming portion (38) is changed to the covering portion forming portion. (36) is formed by bending the covering portion (25), the reinforcing member (16), and the extending portion (24), and the leading end portion of the extending portion (24) is a reinforcing member in the partition member forming portion (35). (16) Abut on the partition wall (22) at the side end (see FIG. 4 (c)).

  Next, by bending the partition member forming portion (35) of the metal base plate (30) with respect to the protruding wall forming portion (34) and bending the protruding wall forming portion (34) with respect to the divided wall forming portion (33). (Refer to FIG. 4 (d)), the one-side connecting portion (23) of the partition member forming portion (35) is brought into contact with the dividing wall forming portion (33) to form the partition member (18), and the protruding wall ( 21) is formed (see FIG. 4 (e)).

  Next, by bending the dividing wall forming part (33) with respect to the side wall forming part (32) and bending the side wall forming part (32) with respect to the flat wall forming part (31) (see FIG. 4 (f)), By bringing the connecting portion (23) on the other side of the partition member forming portion (35) into contact with the flat wall forming portion (31) and bringing the protruding wall forming portions (34) into surface contact with each other, the lower flat wall ( 13) Upper flat wall (14) composed of two dividing walls (19), both side walls (15), both projecting walls (21), partition member (18), reinforcing member (16), extending portion (24) and A bent body (40) composed of the covering portion (25) is formed (see FIG. 4 (g)). Thereafter, between the protruding walls (21), the connecting portion (23) of the partition member (18) and both flat walls (13) and (14), the reinforcing member (16) and both side walls (15), and the extending portion (24) Lower flat wall (13), covering portion (25) and upper flat wall (14), leading end portion of extension portion (24) and partition member (18) reinforcement member (16) partition wall (22) ). Thus, the flat heat exchange tube (4) is manufactured.

  The production of the flat heat exchange tube (4) is performed simultaneously with the production of the capacitor (1). That is, a pair of tubular aluminum header tank body materials having a brazing filler metal layer at least on the outer surface and formed with a plurality of tube insertion holes, a closing member (12), a plurality of aluminum corrugated fins (5), a side A plate (6), a partition member (7), an inlet member (8), and an outlet member (9) are prepared. Therefore, a pair of header tank body materials are arranged at intervals, a closing member (12) is placed at both ends of both header tank body materials, and a partition member (7) is placed at both header tank body materials. Prepare header tank material. Further, the bent bodies (40) and the outer fins (5) are alternately arranged, and both ends of the bent body (40) are inserted into the pipe insertion holes of the header tank material. At this time, the extending portion (24) stretches against the partition wall (22) of the partition member (18), and the partition member (18) stretches against the projecting wall (21). It will be pressed to the (15) side. Therefore, when the folded body (40) is handled, the folded body (40) is prevented from being deformed in the width direction. Further, a side plate (6) is disposed outside the outer fins (5) at both ends, and an inlet member (8) and an outlet member (9) are further disposed.

  Next, a header tank material composed of a header tank body material, a closing member (12) and a partition member (7), a folded body (40), an outer fin (5), a side plate (6), an inlet member (8) and an outlet The member (9) is temporarily fixed to form a temporary fixing body, and a flux is applied to the temporary fixing body. Thereafter, the temporary fixing body is put into the brazing furnace, and the temporary fixing body is heated to a predetermined temperature in the brazing furnace, and at the same time, the flat heat exchange pipe (4) is manufactured, and at the same time, the header tank body material and the closing member ( The header tank (2) (3) is manufactured from the header tank material consisting of 12), the heat exchange pipe (4) and the header tank (2) (3), the heat exchange pipe (4) and the outer fin (5), the outer The fin (5) and the side plate (6), and the header tank (2) (3), the inlet member (8) and the outlet member (9) are brazed simultaneously. Thus, the capacitor (1) is manufactured.

  In the embodiment described above, the reinforcing members are provided inside the both side walls of the flat heat exchange tube (4), but the present invention is not limited to this, and the reinforcing members (16 ) May be provided.

  FIG. 5 shows another embodiment of a flat heat exchange tube according to the present invention.

  In the case of the flat heat exchange tube (50) shown in FIG. 5, a bent portion bent toward the center in the tube height direction is provided at a portion near the tip of the extending portion (24) provided in the reinforcing member (16). (51) is provided, the distal end of the bent portion (51) abuts on the partition wall (22) at the reinforcing member (16) side end portion of the partition member (18), and the bent portion (51 The entire portion excluding) covers a part of the inner surface of the lower flat wall (13).

  The flat heat exchange tube (50) is manufactured by the method shown in FIG. The method shown in FIG. 6 is almost the same as the method shown in FIG. 4, and the same reference numerals are given to the same parts.

  In the method of manufacturing the flat heat exchange tube (50), the reinforcing member forming part (37) of the metal base plate (30) is bent with respect to the covering part forming part (36), and the extension part forming part (38) Is bent with respect to the reinforcing member forming portion (37) to form the covering portion (25), the reinforcing member (16), and the extending portion (24), and then bending and bending the distal end portion of the extending portion forming portion (38). A portion (51) is formed (see FIG. 6 (a)). Next, by bending the covering portion (25), the reinforcing member (16), and the extending portion (24), the distal end portion of the bent portion (51) of the extending portion (24) is used as a reinforcing member in the partition member forming portion (35) ( 16) A flat heat exchange pipe (30) in which the dimension in the thickness direction of the metal base plate (30) is to be manufactured at both ends of the metal base plate (30) by contacting the partition wall (22) at the side end. The cylindrical part (52) larger than the space | interval between the inner surfaces of both the flat walls (13) and (14) of 50) is formed (refer FIG.6 (b)).

  Next, by bending the partition member forming portion (35) of the metal base plate (30) with respect to the protruding wall forming portion (34) and bending the protruding wall forming portion (34) with respect to the divided wall forming portion (33). Then, the connecting portion (23) on one side of the partition member forming portion (35) is brought into contact with the partition wall forming portion (33) to form the partition member (18) and the protruding wall (21) (FIG. 6). (See (c)). Next, when the dividing wall forming part (33) is bent with respect to the side wall forming part (32) and the side wall forming part (32) is bent with respect to the flat wall forming part (31) (see FIG. 6 (d)), By deforming the cylindrical portion (52), the reinforcing member (16) is brought into close contact with the inner surface of the side wall (15), and the extending portion (24) having the bent portion (51) is composed of two divided walls (19). A bent body (55) is formed by closely contacting the inner surface of the flat wall (14) and further forming a flat covering portion (25) and closely contacting the inner surface of the flat wall (13) (see FIG. 6 (e)). Thereafter, as in the case of the flat heat exchange pipe (4), the protruding walls (21) are connected to each other, the connecting portion (23) of the partition member (18), the flat walls (13) (14), the reinforcing member (16 ) And both side walls (15), the extension part (24) and the lower flat wall (13), the covering part (25) and the upper flat wall (14), and the tip part of the bent part (51) of the extension part (24) The flat heat exchange tube (50) is manufactured by brazing the partition wall (22) at the end of the partition member (18) on the reinforcing member (16) side.

  The flat heat exchange tube (50) is also manufactured at the same time as the capacitor (1), similarly to the flat heat exchange tube (4).

  The flat heat exchange pipe according to the present invention is suitably used for a condenser of a refrigeration cycle constituting a car air conditioner.

(1): Capacitor (heat exchanger)
(2) (3): Header tank
(4) (50): Flat heat exchange tube
(5): Outer fin
(13) (14): Flat wall
(15): Side wall
(16): Reinforcing member
(17): Refrigerant passage
(18): Partition member
(19): Partition wall
(21): Protruding wall
(22): Partition wall
(23): Connection part
(24): Stretched part
(25): Covering part
(30): Metal base plate
(31): Flat wall forming part
(32): Side wall forming part
(33): Partition wall forming part
(34): Projection wall forming part
(35): Partition member forming part
(37): Reinforcing member forming part
(38): Extension part formation part
(40) (55): Folded body
(51): Bent part
(52): Cylindrical part

Claims (9)

A pair of flat walls facing each other, two side walls provided between both side edges of both flat walls, a reinforcing member provided inside at least one of the side walls, and an internal And a wave-like partition member that divides the space into a plurality of refrigerant passages extending in the tube length direction, the partition members extending in the tube length direction and arranged side by side in the tube width direction, and separating adjacent refrigerant passages In a flat heat exchange tube having a plurality of partition walls and alternately connecting adjacent partition walls at both ends in the tube height direction and having a connecting portion joined to the inner surfaces of both flat walls,
One end of the reinforcing member in the tube height direction is connected to one end in the tube height direction of the partition wall at the reinforcing member side end of the partition member, and the other end of the reinforcing member in the tube height direction is reinforced. A flat heat exchange in which an extending portion extending integrally to the side wall opposite to the side wall on which the member is provided is integrally provided, and the leading end of the extending portion is in contact with the partition wall at the reinforcing member side end of the partition member tube. The flat heat exchange tube according to claim 1, wherein the reinforcing member covers the inner surface of the side wall, and at least a part of the extending portion covers a part of the inner surface of one flat wall. The flat heat exchange tube according to claim 2, wherein the entire extending portion covers a part of the inner surface of the one flat wall. A bent portion that is bent toward the center in the tube height direction is provided at a portion near the tip of the extending portion, and the distal end of the bent portion abuts on the partition wall at the reinforcing member side end of the partition member, and the extending portion The flat heat exchange tube according to claim 2, wherein the entire portion excluding the bent portion covers a part of the inner surface of the one flat wall. The flat heat exchange pipe according to any one of claims 2 to 4, wherein a covering portion that covers an inner surface of the other flat wall is provided between the reinforcing member and the partition wall of the partition member. One flat wall is formed as a whole, and the other flat wall is formed by two divided walls arranged in the tube width direction. Side walls are provided between the outer edges in the width direction, reinforcing members are provided on the inner sides of the both side walls, and the ends projecting toward the one flat wall side at the inner edges in the tube width direction of both divided walls. Projecting walls joined to the flat wall in a state of being in contact with the one flat wall, and the projecting walls are joined together, and the partition member is connected to the tips of the projecting walls. The flat heat exchange according to any one of claims 1 to 5, wherein the flat heat exchange is integrally formed so as to project outward in the width direction, and a reinforcing member is integrally formed on an outer edge of the partition member in the tube width direction. tube. A plurality of flat heat exchange pipes that are spaced apart from each other and arranged in parallel in the width direction toward the airflow direction, a header tank to which both ends of the heat exchange pipe are connected, and the adjacent heat exchange pipes The heat exchanger which is provided with the fin arrange | positioned in this, and a heat exchange pipe consists of the flat heat exchange pipe in any one of Claims 1-6. A pair of flat walls facing each other, two side walls provided between both side edges of both flat walls, and an inner side of at least one of both side walls to cover the inner surface of the side walls A reinforcing member, and a wave-like partition member that partitions the internal space into a plurality of refrigerant passages extending in the tube length direction,
One flat wall is formed as a whole, and the other flat wall is formed by two divided walls arranged in the tube width direction. Both side edges of the one flat wall and the tube width direction in both divided walls Side walls are provided between the outer edge portions and reinforcing members are provided on the inner sides of both side walls, respectively. A projecting wall joined to the flat wall in a state of being in contact with one of the flat walls is integrally formed and the projecting walls are joined to each other. A plurality of partition walls, which are integrally formed so as to project outward, are provided in parallel in the tube width direction and extend in the tube length direction, and separate adjacent refrigerant passages, and adjacent partition walls Connected alternately at both ends in the tube height direction And has a connecting portion which is joined to both the flat wall inner surface,
One end of the reinforcing member in the tube height direction is connected to one end in the tube height direction of the partition wall at the reinforcing member side end of the partition member, and the other end of the reinforcing member in the tube height direction is reinforced. The extending portion extending to the side wall opposite to the side wall on which the member is provided is integrally provided, and the entire extending portion covers a part of the inner surface of one flat wall, and the leading end of the extending portion is a partition. A method for producing a flat heat exchange tube that is in contact with a partition wall at a reinforcing member side end of a member,
One flat wall forming part that forms the one flat wall, two side wall forming parts that are provided on both side edges of the flat wall forming part and that form side walls, and opposite to the flat wall forming part in both side wall forming parts Two dividing wall forming portions provided on the side edge and forming the dividing wall of the other flat wall, 2 provided on the side edge opposite to the side wall forming portion in both dividing wall forming portions and forming a protruding wall Two partition wall forming portions, two partition member forming portions provided on a side edge opposite to the partition wall forming portion in both the projecting wall forming portions and forming a partition member, and a projecting wall forming portion in both partition member forming portions; Are provided on the side edge on the opposite side and form the reinforcing member, and on the side edge opposite to the partition member forming part in both the reinforcing member forming parts and stretched to form the stretched part Prepare one metal base plate with part forming part The partition member forming portion of the metal base plate is provided with a connecting portion that connects the plurality of partition walls and the adjacent partition walls, and the reinforcing member forming portion of the metal base plate is partitioned at the end of the partition member forming portion. The reinforcing member and the extending portion are formed by bending the extending portion forming portion with respect to the reinforcing member forming portion while bending with respect to the wall, and the leading end portion of the extending portion is used as a partition wall at the reinforcing member side end portion of the partition member. Next, the partition member forming portion of the metal base plate is bent with respect to the protruding wall forming portion, and the protruding wall forming portion is bent with respect to the dividing wall forming portion, thereby dividing the connecting portion on one side of the partition member forming portion. The connecting portion on the other side of the partition member forming portion is made flat by contacting the wall forming portion and then bending the dividing wall forming portion with respect to the side wall forming portion and bending the side wall forming portion with respect to the flat wall forming portion. When it makes contact with the forming part The bent body comprising one flat wall, the other flat wall composed of two divided walls, both side walls, both projecting walls, a partition member, a reinforcing member and an extending portion is obtained by bringing the projecting wall forming portions into surface contact with each other. After that, the two protruding walls, the connecting portion of the partition member and both flat walls, the reinforcing member and both side walls, the extending portion and one of the flat walls, and the partitioning of the leading end portion of the extending portion and the reinforcing member side end portion of the partitioning member A method for producing a flat heat exchange tube, including brazing a wall. A pair of flat walls facing each other, two side walls provided between both side edges of both flat walls, and an inner side of at least one of both side walls to cover the inner surface of the side walls A reinforcing member, and a wave-like partition member that partitions the internal space into a plurality of refrigerant passages extending in the tube length direction,
One flat wall is formed as a whole, and the other flat wall is formed by two divided walls arranged in the tube width direction. Both side edges of the one flat wall and the tube width direction in both divided walls Side walls are provided between the outer edge portions and reinforcing members are provided on the inner sides of both side walls, respectively. A projecting wall joined to the flat wall in a state of being in contact with one of the flat walls is integrally formed and the projecting walls are joined to each other. A plurality of partition walls, which are integrally formed so as to project outward, are provided in parallel in the tube width direction and extend in the tube length direction, and separate adjacent refrigerant passages, and adjacent partition walls Connected alternately at both ends in the tube height direction And has a connecting portion which is joined to both the flat wall inner surface,
One end of the reinforcing member in the tube height direction is connected to one end in the tube height direction of the partition wall at the reinforcing member side end of the partition member, and the other end of the reinforcing member in the tube height direction is reinforced. An extending portion extending integrally to the side wall opposite to the side wall provided with the member is integrally provided, and a bent portion bent toward the central portion in the tube height direction is provided at a portion near the tip of the extending portion, The flat heat in which the tip of the bent portion abuts against the partition wall at the reinforcing member side end of the partition member, and the entire portion excluding the bent portion in the extending portion covers a part of the inner surface of one flat wall. A method of manufacturing an exchange tube,
One flat wall forming part that forms the one flat wall, two side wall forming parts that are provided on both side edges of the flat wall forming part and that form side walls, and opposite to the flat wall forming part in both side wall forming parts Two dividing wall forming portions provided on the side edge and forming the dividing wall of the other flat wall, 2 provided on the side edge opposite to the side wall forming portion in both dividing wall forming portions and forming a protruding wall Two partition wall forming portions, two partition member forming portions provided on a side edge opposite to the partition wall forming portion in both the projecting wall forming portions and forming a partition member, and a projecting wall forming portion in both partition member forming portions; Are provided on the side edge on the opposite side and form the reinforcing member, and on the side edge opposite to the partition member forming part in both the reinforcing member forming parts and stretched to form the stretched part Prepare one metal base plate with part forming part The partition member forming portion of the metal base plate is provided with a connecting portion that connects the plurality of partition walls and the adjacent partition walls, and the reinforcing member forming portion of the metal base plate is partitioned at the end of the partition member forming portion. Bending with respect to the wall and bending the stretched portion forming portion with respect to the reinforcing member forming portion, and further bending the portion near the tip of the stretched portion to form a stretched portion having a reinforcing member and a bent portion. By bringing the front end of the bent portion into contact with the partition wall at the reinforcing member side end of the partition member, the thickness of the metal base plate in the thickness direction of the flat heat exchange tube to be manufactured is set at both ends of the metal base plate. A cylindrical portion larger than the distance between the inner surfaces of both flat walls is formed, and then the partition member forming portion of the metal base plate is bent with respect to the protruding wall forming portion and the protruding wall forming portion is bent with respect to the divided wall forming portion. One side of the partition member forming part The connecting part is brought into contact with the dividing wall forming part, and then the dividing wall forming part is bent with respect to the side wall forming part and the side wall forming part is bent with respect to the flat wall forming part, thereby connecting the other side of the partition member forming part. The flat wall forming part is brought into contact with each other, the projecting wall forming parts are brought into surface contact with each other, and the cylindrical part is deformed, whereby one flat wall, the other flat wall composed of two divided walls, both side walls A bent body composed of extending portions having both protruding walls, partitioning members, reinforcing members and bent portions, and thereafter, the protruding walls, the connecting portions of the partitioning members and the flat walls, the reinforcing members and the side walls, and the extending portions; A method for producing a flat heat exchange tube, comprising brazing one flat wall and a distal end portion of a bent portion of an extending portion and a partition wall at a reinforcing member side end portion of the partition member.

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