JP6531328B2 - Heat exchanger and method of manufacturing the same - Google Patents

Description

  The present invention relates to a heat exchanger, and more particularly to a heat exchanger configured by laminating a plurality of flat heat exchange tubes and a method of manufacturing the same.

  Conventionally, as a heat exchanger of this type, a heat exchange is configured by arranging and joining by mutually bonding tube members formed by bending or drilling a thin plate of stainless steel or aluminum. What laminated | stacked multiple tubes for tubes is proposed (for example, refer patent document 1). The heat exchange tube of the heat exchanger has a rectangular shape with a flat outer shape, and two through holes are formed at both ends in the longitudinal direction as an inlet / outlet of the heat exchange medium. Then, the heat exchange medium is supplied from one of the two flow inlets / outlets of the heat exchange tube to the heat exchanger configured by stacking a plurality of heat exchange tubes, and the heat exchange medium is discharged from the other. . In this heat exchanger, air is supplied in a direction perpendicular to the longitudinal direction of the heat exchange tubes, and the supplied air passes through the gaps between the adjacent heat exchange tubes to exchange heat with the heat exchange medium. Being heated or cooled.

JP, 2014-020672, A

  In the heat exchanger formed by laminating such flat tube members, various methods have been considered in order to improve the heat exchange efficiency. For example, high pressure is applied to the heat exchange medium flowing in the flow path of the heat exchange medium of the tube member formed of V-shaped or W-shaped wave irregularities on the surface of the heat exchange tube, or formed of a thin plate. Have an effect. As described above, in the heat exchanger formed by stacking flat tube members, further improvement of the heat exchange efficiency is an important issue.

  In the heat exchanger of the present invention, the main object is to improve the heat exchange efficiency. Moreover, in the manufacturing method of the heat exchanger of this invention, it aims mainly at manufacturing the heat exchanger with high heat exchange efficiency more simply.

  The heat exchanger of the present invention and the method of manufacturing the same employ the following means in order to achieve the above-mentioned main object.

The heat exchanger of the present invention is
A tube member formed to constitute a flat heat exchange tube having two outflow inlets / outlets of a heat exchange medium and a communicating flow passage communicating the two outflow inlets by joining facing each other using a metal material And a plurality of stacked layers so that the two inlets and outlets of the heat exchange tubes adjacent to each other are aligned, and flowing between the heat exchange tubes adjacent to the heat exchange medium flowing into the heat exchange tubes. A heat exchanger for exchanging heat with an exchange medium,
The tube member is formed such that the two outflow inlets are in series in the direction of the flow of the heat exchange medium, and the communication flow path is U-shaped from one of the two outflow inlets to the other. It is formed as two flow paths symmetrical in shape and mirror,
It is characterized by

  In the heat exchanger according to the present invention, heat exchange is performed between the heat exchange medium flowing in the plurality of stacked heat exchange tubes and the heat exchange medium flowing between the adjacent heat exchange tubes. The tube member constituting the heat exchange tube is formed with two flow inlets and outlets of the heat exchange medium and a communication channel communicating the two flow inlets, and in particular, the two flow inlets exchange heat. It is formed to be in series in the direction of the flow of the medium. By forming the two outflow inlets in this manner, one of the outflow inlets is formed as compared to one in which the two outflow inlets are arranged in series in the direction perpendicular to the flow direction of the heat exchange medium. The flow passage width of the heat exchange medium can be widened by three, and the flow passage width effective for heat exchange can be broadened. As a result, the heat exchange efficiency can be improved. Further, since the two outflow inlets are formed in series in the direction of the flow of the heat exchange medium, the heat exchange medium is supplied to one of the two outflow inlets on the downstream side of the flow of the heat exchange medium. If the heat exchange medium is discharged from the other upstream side of the flow of the heat exchange medium, the flow of the heat exchange medium as a whole and the flow of the heat exchange medium can be countercurrent. The heat exchange efficiency can be further improved. Furthermore, heat exchange is performed substantially equally in the two flow paths by forming the communication flow path that connects the two outflow and inlet ports as two U-shaped and mirror-symmetrical flow paths from one of the two outflow ports to the other. A medium can be supplied, and heat exchange can be performed substantially equally in the two flow paths. As a result of these, the heat exchange efficiency can be improved.

  In the heat exchanger according to the present invention, the tube member has a rectangular outer shape, and the two flow inlets and outlets are formed in line in the transverse direction at the center of the tube member in the longitudinal direction. And the communication passage is a first passage extending from one of the two outflow inlets to a longitudinal end of the tube member and a second passage extending from the end to the other of the two outflow inlets It may be formed as two flow paths which consist of a return flow path portion which is folded back so as to connect the first flow path portion and the second flow path portion at the end portion and the end portion. In this way, the tube member can be made mirror-symmetrical at the longitudinal center. Therefore, it is not necessary to form the tube member on one side of the heat exchange tube and the tube member on the other side as the tube members, and it is sufficient to form a single-shaped tube member. Thereby, the number of parts can be reduced, and the assemblability can be improved.

  In this case, the first flow path portion is formed along the edge of the tube member, and the second flow path portion is formed along the center of the tube member, and the first flow path portion The space between the second flow path portion and the second flow path portion is formed to be wider than the width of the second flow path portion, and the space between the second flow path portion and the edge of the tube member is the first flow path It may be formed to be wider than the width of the part. That is, considering the center line along the longitudinal direction of the tube member, the first channel portion is separated from the center line by the width of the second channel portion on one side of the tube member divided into two at the center line. The second flow passage portion is formed near the edge of the tube member, and the second flow passage portion is separated from the edge of the tube member on the other side of the tube member divided into two at the central line and closer to the central line Will be formed. Furthermore, in this case, a plurality of tube members are stacked such that one of the second flow passage portions of the adjacent heat exchange tubes faces a portion between the other first flow passage portion and the second flow passage portion. The exchanger may be configured. That is, each time the heat exchange tubes are stacked in an orientation, they are rotated 180 degrees around an axis perpendicular to the flat surface of the heat exchange tubes. In this case, the second flow path portion faces the portion where the flow path between the first flow path portion and the second flow path portion of the adjacent heat exchange tube is not formed, and the first flow path portion is adjacent Since the heat exchange tube faces a portion where the flow passage on the edge side of the second flow passage portion is not formed, the gap between the adjacent heat exchange tubes can be maintained substantially constant. In addition, since the gap between the adjacent heat exchange tubes meanders in the flow direction of the heat exchange medium, the flow of the heat exchange medium can be slightly disturbed to improve the heat exchange efficiency.

The manufacturing method of the heat exchanger of the present invention is
A method of manufacturing a heat exchanger,
Using a clad plate material in which a second metal having a melting point lower than that of the first metal is joined to both surfaces of the first metal center material and the thickness is 0.3 mm or less, the outer shape is rectangular and short at the center in the longitudinal direction A first flow passage having two flow inlets of the heat exchange medium in series in the direction, and a first flow passage extending from one of the flow outlets to a longitudinal end, and the two flow inlets from the end Two mirror-symmetrical U-shaped communication consisting of a second flow passage leading to the other and a folded flow passage folded back so as to connect the first flow passage and the second flow passage at the end. A tube member forming step of forming a tube member having a flow path;
A plurality of stacked tube members are stacked so that a plurality of flat heat exchange tubes configured by facing two tube members so that the two communication flow paths and the two outlet and inlets are aligned. And assembling the laminated body, and
Brazing the laminated body using a furnace adjusted to a temperature lower than the melting point of the first metal and higher than the melting point of the second metal;
The gist is to have

  In the method of manufacturing a heat exchanger according to the present invention, a tube member constituting a flat heat exchange tube by facing each other is joined with a second metal having a melting point lower than that of the first metal on the center material of the first metal. It forms using the clad board material which thickness was 0.3 mm or less. Then, a plurality of tube members are stacked and a stacked body is assembled so that a plurality of heat exchange tubes are stacked, and the temperature is adjusted to a temperature lower than the melting point of the first metal and higher than the melting point of the second metal. The laminate is brazed using a furnace. That is, the clad plate material is subjected to press processing or the like to form a plurality of tube members, and the plurality of formed tube members are stacked in a plurality so that a plurality of heat exchange tubes are stacked. Complete the heat exchanger by putting it in the furnace. The completed heat exchanger has a rectangular outer shape and has two outlet ports of the heat exchange medium so as to be in series in the transverse direction at the center in the longitudinal direction, and the longitudinal end from one of the two outlet ports. A return flow that turns back so as to connect the first flow passage and the second flow passage at the end with the first flow passage extending to the end and the second flow passage extending from the end to the other of the two outflow inlets The heat exchanger of the present invention as described above can be obtained by laminating the tube members having two mirror-symmetrical U-shaped communicating flow paths consisting of the passage portion. As a result, a heat exchanger with high heat exchange efficiency can be manufactured more easily.

  In the method of manufacturing a heat exchanger according to the present invention, in the tube member forming step, the second flow passage portion is along the center of the tube member such that the first flow passage portion is along the edge of the tube member. Thus, the distance between the second flow passage portion and the edge of the tube member is such that the distance between the first flow passage portion and the second flow passage portion is wider than the width of the second flow passage portion. The tube member is formed to be wider than the width of the first flow passage portion, and in the assembling step, one of the second flow passage portions of the adjacent heat exchange tubes is the other of the first flow passage. It may be a step of laminating a plurality of the tube members so as to face a portion between the passage portion and the second flow passage portion. In this case, considering the center line along the longitudinal direction of the tube member, the first channel portion is separated from the center line by the width of the second channel portion on one side of the tube member divided into two at the center line. The second channel portion is formed near the edge of the tube member, and the second channel portion is spaced apart from the edge of the tube member on the other side of the tube member divided into two at the center line, than the width of the first channel portion. It will be formed nearby. Therefore, the second flow path portion faces the portion where the flow path between the first flow path portion and the second flow path portion of the adjacent heat exchange tube is not formed, and the first flow path portion is the adjacent heat Since it faces the part in which the flow passage on the edge side of the second flow passage portion of the replacement tube is not formed, the gap between the adjacent heat exchange tubes can be maintained substantially constant. In addition, since the gap between the adjacent heat exchange tubes meanders in the flow direction of the heat exchange medium, the flow of the heat exchange medium can be slightly disturbed to improve the heat exchange efficiency.

It is a block diagram which shows the outline of a structure of the heat exchanger 20 of an Example. It is sectional drawing which shows typically the AA cross section in FIG. It is a block diagram which shows the outline of a structure of the tube 30A for heat exchange. It is a block diagram which shows the outline of a structure of the tube 30B for heat exchange. It is sectional drawing of the BB surface in FIG. It is sectional drawing of CC surface in FIG.

  Next, modes for carrying out the present invention will be described using examples.

  FIG. 1 is a schematic diagram showing the configuration of a heat exchanger 20 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing an A-A cross section in FIG. The heat exchanger 20 according to the embodiment is used for a refrigeration cycle such as an air conditioner or a refrigeration apparatus or a cooling apparatus for an apparatus that operates with heat generation, and is configured by two tube members 40 as shown in FIG. A laminated body 22 configured by alternately laminating a plurality of heat exchange tubes 30A and 30B, a plate 23 disposed on both sides in the arrangement direction (vertical direction in the drawing) of the laminated body 22, and each heat exchange tube 30A , 30B in the longitudinal direction (left and right direction in the figure), and the supply channels attached to the inflow channel 25 and the outflow channel 26 of the heat exchange medium formed in the laminate 22 and the plate 23 And a pipe 27 and a discharge pipe 28. The heat exchanger 20 has heat adjacent to a heat exchange medium such as hydrofluorocarbon or water supplied from the inflow channel 25 to communication channels 46 and 47 described later formed in the heat exchange tubes 30A and 30B. The heat exchange medium is heated or cooled or the heat exchange medium is cooled or heated by heat exchange with the heat exchange medium such as air flowing in the gap between the exchange tubes 30A, 30B. In FIG. 2, the white arrows described above the supply pipe 27 and the discharge pipe 28 indicate the directions of supply and discharge of the heat exchange medium, and the white arrows described on the left and right of the heat exchanger 20 are , Shows the flow direction of the heat exchange medium.

  FIG. 3 is a schematic view showing a configuration of the heat exchange tube 30A. FIG. 4 is a schematic view showing a configuration of the heat exchange tube 30B. 5 is a cross-sectional view of the B-B plane in FIG. 1, and FIG. 6 is a cross-sectional view of the C-C plane in FIG.

  The heat exchange tube 30B is the same as the heat exchange tube 30A rotated 180 degrees around the vertical axis when the flat surface of the heat exchange tube 30A is horizontal as shown in FIGS. 3 and 4. is there. That is, the heat exchange tube 30B becomes identical to the heat exchange tube 30A only by rotating the heat exchange tube 30A by 180 degrees.

  The heat exchange tubes 30A and 30B are so-called clad plate materials having a thickness of 0.2 mm obtained by joining a plate material and a brazing material by arranging a brazing material such as an aluminum silicon alloy on both surfaces of an aluminum plate and integrally rolling it. On the other hand, it is constituted by facing and joining tube members 40 which gave press processing, punching processing, etc. to it. As shown in FIGS. 3 and 4, the tube member 40 is formed with two outflow / inlet through holes 42a and 42b at the center in the longitudinal direction (left and right direction in the figure) so as to be arranged in series in the lateral direction. The two U-shaped communication channels 46 and 47 are formed to communicate the two outflow / inlet through holes 42a and 42b. Further, flange portions 44a and 44b are formed around the two outlet and inlet through holes 42a and 42b, and a slit 49 is formed between the two outlet and inlet through holes 42a and 42b. The slits 49 are provided to suppress the heat transfer of the heat exchange medium in the two outflow / inlet through holes 42 a and 42 b.

  The flanges 44a and 44b are formed to be joined to the adjacent flanges 44a and 44b when the heat exchange tubes 30A and 30B are stacked. Thereby, as shown in FIG. 6, while maintaining the space | interval of adjacent tube 30A, 30B for heat exchange at a predetermined space | interval, the through-hole 42a, 42b of outflow inlet / outlet vicinity of the both ends of heat exchange tube 30A, 30B is. Connected in the stacking direction, the heat exchange medium inflow channel 25 and the outflow channel 26 are formed.

  The communication channels 46 and 47 are formed as channels having a fixed width that is mirror-symmetrical with a straight line (line in the vertical direction in FIGS. 3 and 4) passing through the centers of the two outlet / inlet through holes 42a and 42b. When considering the center line along the longitudinal direction of the tube member 40, the tube member 40 is separated from the center line at the upper side (lower side in FIG. 4) in FIG. Of the first channel portion 46a, 47a formed along the edge from the outlet / inlet through hole 42a to the end of the tube member 40 along the edge, and the tube member divided into two at the center line A second flow path portion 46b is formed on the lower side in FIG. 3 (the upper side in FIG. 4) away from the edge of the tube member and along the central line near the central line to extend from the end to the outlet / inlet through hole 42b , 7b and, the first channel part 46a at the ends, 47a and the second flow path portion 46b, folded back so as to connect the 47b turned-back channel portion 46c, it is constituted by the 47c. The width of the end fin portion 48a where the flow path between the second flow paths 46b and 47b and the edge of the tube member 40 (the lower end in FIG. 3, the upper end in FIG. 4) is not formed is the first flow path. It is formed to be wider than the width of the portions 46a and 47a (in the embodiment, simply the width of the flow path), and the flow path between the first flow path portions 46a and 47a and the second flow path portions 46b and 47b is formed. The width of the central fin portion 48b which is not formed is formed to be wider than the width of the second flow path portions 46b and 47b (in the embodiment, simply the width of the flow path). When the heat exchange tubes 30A and 30B are alternately stacked by forming the communication flow paths 46 and 47 in this manner, as shown in FIG. 5, the gap between the heat exchange tubes 30A and 30B is It can be formed so that the width is substantially constant and meandering.

  In the embodiment, the tube members 40 are stacked and arranged such that the heat exchange tubes 30A of FIG. 3 and the heat exchange tubes 30B of FIG. Assemble the supply pipe 27 and the discharge pipe 28 and heat this at a temperature higher than the melting point of the brazing material and lower than the melting point of the plate (for example, 610 ° C or 620 ° C) Complete the exchanger 20. That is, the facing portions of the tube members 40 constituting the heat exchange tubes 30A, 30B are joined, and the contact portions of the flange portions 44a, 44b of the adjacent heat exchange tubes 30A, 30B are joined, , 24, the supply pipe 27, and the discharge pipe 28 are joined.

  In the heat exchanger 20 configured in this manner, a heat exchange medium such as hydrofluorocarbon or water is supplied from the supply pipe 27 to the inflow channel 25 formed by the two outlet / inlet through holes 42a and 42b, The fluid flows through the communication channels 46 and 47 of the replacement tubes 30A and 30B, and flows out to the outlet channel 26 formed by the two outlet / inlet through holes 42a and 42b, and is discharged from the outlet pipe 28. On the other hand, a heat exchange medium such as air is supplied to the heat exchange tubes 30A and 30B from the outflow flow channel 26 side, and meanders through the gaps between the heat exchange tubes 30A and 30B for heat exchange Heat exchange with the medium is performed, and the heat is discharged from the inflow channel 25 side. Thus, by supplying and discharging the heat exchange medium and the heat exchange medium, it is possible to make the flow of the heat exchange medium as a whole and the flow of the heat exchange medium opposite to each other.

  In the heat exchanger 20 of the embodiment described above, the tube member 40 is provided with the two outlet / inlet through holes 42a and 42b so as to be arranged in series in the lateral direction at the center in the longitudinal direction, and The heat exchange tubes 30A and 30B are formed by forming two U-shaped communication channels 46 and 47 communicating the two outflow / inlet through holes 42a and 42b. As a result, when the heat exchange medium is supplied and discharged in the direction perpendicular to the longitudinal direction, two outflow / inlet through holes are formed at both ends of the rectangular heat exchange tube in the longitudinal direction As compared with the one in which the communication flow passage communicating the two outflow inlet through holes is formed, the flow passage width of the heat exchange medium can be widened by one of the outflow inlet through holes, and the heat exchange is performed. The effective channel width can be increased. As a result, the heat exchange efficiency can be improved. Further, since the two outlet through holes 42a and 42b are formed in series in the direction of the flow of the heat exchange medium, two outlet inlet through holes 42a and 42b are formed. The heat exchange medium is supplied with the downstream side of the flow of the heat exchange medium of the flow paths 22 and 24 as the inflow flow path 25 and the heat exchange medium is supplied with the upstream side of the flow of the heat exchange medium as the outflow flow path 26 By discharging the heat exchange medium, the flow of the heat exchange medium as a whole and the flow of the heat exchange medium can be opposed to each other, and the heat exchange efficiency can be further improved. Further, by forming the communication flow channels 46 and 47 as two U-shaped and mirror-symmetrical flow channels from one of the two through holes 42 a and 42 b to the other, the two flow channels 46 and 47 can be obtained. The heat exchange medium can be supplied substantially uniformly, and heat exchange can be performed substantially equally by the two flow paths 46 and 47. As a result of these, the heat exchange efficiency can be improved. Since the tube members 40 are formed as mirror images in this manner, it is not necessary to form the tube members on one side of the heat exchange tubes 30A and 30B and the tube members on the other side, and a single-shaped tube member 40 is formed. It will be good. Thereby, the number of parts can be reduced, and the assemblability can be improved.

  In the heat exchanger 20 of the embodiment, when considering the center line along the longitudinal direction of the tube member 40, the first flow path portion 46a, 47a of the communication flow path 46, 47 is divided into two by the center line To be separated from the central line on one side of the tube member 40 and along the edge near the edge of the tube member 40 so as to extend from the outlet / inlet through hole 42a to the end of the tube member 40; 46b, 47b are separated from the edge of the tube member 40 on the other side of the tube member 40 divided into two by the center line, and from the end to the outlet / inlet through hole 42b along the center line near the center line It forms, and it forms return channel part 46c, 47c so that 1st channel part 46a, 47a and 2nd channel part 46b, 47b may be connected. Further, the width of the end fin 48a of the tube member 40 is made wider than the width of the first flow path 46a, 47a and the width of the central fin 48b is larger than the width of the second flow path 46b, 47b. Form to be wider. Then, the heat exchange tubes 30A and 30B are alternately stacked to constitute the heat exchanger 20. Therefore, the gap between the heat exchange tubes 30A and 30B can be formed so as to meander so that the width becomes substantially constant. As a result, the pressure loss of the heat exchange medium can be suppressed, and the flow of the heat exchange medium can be slightly disturbed to improve the heat exchange efficiency.

  In the heat exchanger 20 of the embodiment, the heat transfer medium of the heat exchange medium in the two outflow / inlet through holes 42a, 42b is suppressed by forming the slits 49 between the two outflow / inlet through holes 42a, 42b. be able to. As a result, the heat exchange efficiency can be improved.

  In the method of manufacturing the heat exchanger 20 of the embodiment, the tube members 40 constituting the flat heat exchange tubes 30A and 30B are formed by using clad clad plates by facing each other, and the heat exchange tubes 30A and 30B are alternately arranged. A plurality of tube members 40 are stacked to assemble a plurality of tube members 40, and the stacked body 22 is assembled, and this is put in a furnace having a temperature higher than the melting point of the brazing material and lower than the melting point of the plate to bond the contact portion (brazing) Thus, the heat exchanger 20 of the embodiment is completed. For this reason, the heat exchanger 20 of the embodiment with high heat exchange efficiency can be manufactured more simply.

  In the heat exchanger 20 of the embodiment, the first flow path portions 46 a and 47 a of the communication flow paths 46 and 47 are arranged along the edge near the longitudinal edge of the tube member 40 from the outlet / inlet through hole 42 a The second flow path portions 46b and 47b are formed along the central line in the vicinity of the central line in the longitudinal direction of the tube member 40 so as to extend from the end to the outlet / inlet through hole 42b. Although the folded channel portions 46c and 47c are formed to connect the first channel portions 46a and 47a and the second channel portions 46b and 47b, the first channel portion and the second channel portion are formed of tube members. It may be formed at the center of the edge and the center line. In this case, since the heat exchange tubes in which the tube members face each other are mirror symmetrical at the center line in the longitudinal direction, the heat exchanger tubes 30A and 30B of the heat exchanger 20 of the embodiment have the same shape. Become.

  In the heat exchanger 20 of the embodiment, the slit 49 is formed between the two outlet through holes 42a and 42b, but the slit 49 may not be formed.

  In the heat exchanger 20 of the embodiment, the flanges 44a and 44b are formed around the outlet and inlet through holes 42a and 42b, but instead of the flanges 44a and 44b, the burring is formed by burring. It is good also as things. In this case, the diameter of one burring portion is slightly smaller than or slightly larger than the diameter of the other burring portion so that one burring portion of the two burring portions of the tube member fits into the other burring portion. It is preferable to form large. When the tube members having such burring portions are stacked so that the heat exchange tubes 30A and the heat exchange tubes 30B of the embodiment are alternately stacked, the burring portions of the facing tube members fit with each other. Can.

  In the heat exchanger 20 of the embodiment, the tube member 40 is formed by using a clad plate material having a thickness of 0.2 mm in which a brazing material such as an aluminum silicon alloy is bonded to both sides of an aluminum plate material. The tube member 40 may be formed using a clad plate material of aluminum and aluminum alloy thinner than 2 mm or a clad plate material of aluminum and aluminum alloy thicker than 0.2 mm. Alternatively, the tube member may be formed using a clad plate material in which a brazing material such as copper or nickel is joined to both sides of a stainless steel plate or a plate material obtained by plating stainless steel on both sides of a plate material. Furthermore, the tube member may be formed using a plate material in which a brazing material is joined to or plated on both sides of a copper plate material.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all by these Examples, In the range which does not deviate from the summary of this invention, it becomes various forms Of course it can be implemented.

  The present invention is applicable to the manufacturing industry of heat exchangers and the like.

  Reference Signs List 20 heat exchanger, 22 laminated body, 23, 24 plate, 25 inflow channel, 26 outflow channel, 27 supply pipe, 28 discharge pipe, 30A, 30B heat exchange tube, 40 tube member, 42a, 42b outflow Inlet through holes 44a and 44b flanges 46 and 47 communication channels 46a and 47a first channels 46b and 47b second channels 46c and 47c folded channels 48a end fins 48b Center fins, 49 slits.

Claims (3)

A tube member formed to constitute a flat heat exchange tube having two outflow inlets / outlets of a heat exchange medium and a communicating flow passage communicating the two outflow inlets by joining facing each other using a metal material And a plurality of stacked layers so that the two inlets and outlets of the heat exchange tubes adjacent to each other are aligned, and flowing between the heat exchange tubes adjacent to the heat exchange medium flowing into the heat exchange tubes. A heat exchanger for exchanging heat with an exchange medium,
The tube member is formed such that the two outflow inlets are in series in the direction of the flow of the heat exchange medium, and the communication flow path is U-shaped from one of the two outflow inlets to the other. It is formed as two flow paths symmetrical in shape and mirror symmetry ,
The tube member has a rectangular outer shape, and
The two inlets and outlets are formed to be arranged in series in the lateral direction at the longitudinal center of the tube member,
The communication channel is a first channel portion extending from one of the two outflow inlets to a longitudinal end of the tube member, and a second channel portion extending from the end to the other of the two outflow inlets It is formed as two flow paths which consist of a return flow path portion which is folded back so as to connect the first flow path portion and the second flow path portion at the end portion,
The first flow passage portion is formed along an edge of the tube member,
The second channel portion is formed along the center of the tube member,
The space between the first flow passage portion and the second flow passage portion is formed to be wider than the width of the second flow passage portion,
The distance between the second flow passage and the edge of the tube member is wider than the width of the first flow passage.
Heat exchanger. The heat exchanger according to claim 1 , wherein
A plurality of the tube members are laminated such that one of the second flow passage portions of the adjacent heat exchange tubes faces a portion between the other first flow passage portion and the second flow passage portion. ,
Heat exchanger. A method of manufacturing a heat exchanger,
Using a clad plate material in which a second metal having a melting point lower than that of the first metal is joined to both surfaces of the first metal center material and the thickness is 0.3 mm or less, the outer shape is rectangular and short at the center in the longitudinal direction A first flow passage having two flow inlets of the heat exchange medium in series in the direction, and a first flow passage extending from one of the flow outlets to a longitudinal end, and the two flow inlets from the end Two mirror-symmetrical U-shaped communication consisting of a second flow passage leading to the other and a folded flow passage folded back so as to connect the first flow passage and the second flow passage at the end. A tube member forming step of forming a tube member having a flow path;
A plurality of stacked tube members are stacked so that a plurality of flat heat exchange tubes configured by facing two tube members so that the two communication flow paths and the two outlet and inlets are aligned. And assembling the laminated body, and
Brazing the laminated body using a furnace adjusted to a temperature lower than the melting point of the first metal and higher than the melting point of the second metal;
I have a,
In the tube member forming step, the first flow passage portion and the first flow passage portion may be formed such that the second flow passage portion is along the center of the tube member such that the first flow passage portion is along the edge of the tube member. The distance between the second flow passage and the edge of the tube member is wider than the width of the first flow passage so that the distance between the second flow passage and the second flow passage is wider than the width of the second flow passage. Forming the tube member on the
In the assembling step, a plurality of the tube members are arranged such that the second flow passage portion of one of the heat exchange tubes adjacent to one another faces a portion between the other first flow passage portion and the second flow passage portion. Step of laminating,
Heat exchanger manufacturing method.

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