JP2010121928A - Heat exchanger and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger and its manufacturing method capable of facilitating bending, and capable of maintaining corrosion resistance. <P>SOLUTION: In the heat exchanger comprised by integrally joining a pair of header pipes 3a, 3b each formed of an aluminum member, a plurality of mutually parallel heat exchanger tubes 4 with flat cross sections connected between the header pipes, and an inner side corrugated fin 5 interposed between the heat exchanger tubes, an outer side corrugated fin 10 in parallel with the inner side corrugated fin is provided on an outer side face in an outermost side of the heat exchanger tubes. A deformed waveform part 20 is provided on the outer side corrugated fin to add rigidity to the outer side corrugated fin, and bending parts 30 with the same curvature are provided in the heat exchanger tubes, the inner side corrugated fin, and the outer side corrugated fin. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat exchanger and a method of manufacturing the heat exchanger. More specifically, the present invention relates to a pair of header pipes each formed of an aluminum member, and a plurality of flat cross-sectional heat exchange pipes parallel to each other. Further, the present invention relates to a heat exchanger having a bend formed by integrally joining corrugated fins interposed between these heat exchange tubes and a method for manufacturing the same.

  Conventionally, a corrugated fin has been conventionally used in this type of so-called parallel flow type heat exchanger. However, the corrugated fin after brazing becomes soft due to annealing, and thus becomes weak in strength. Therefore, conventionally, in order to protect, for example, corrugated fins on both sides of the core (heat exchanger body), side plates are attached.

  When bending the core, the heat exchange tube is hollow, so it is flexible to bend, but the side plate is solid, so it has great resistance to bending and large to bend. Further, there is a problem that the side plate is deformed in a wave shape in the corrugated fin lamination direction by bending, and the outermost corrugated fin is deformed.

In order to solve the above problem, a hollow member is used for a side plate, and a heat exchange tube, a corrugated fin, and a hollow side plate are provided with a bent portion having the same curvature (for example, Patent Document 1). reference).

Japanese Patent Laid-Open No. 10-318694 (Claims, FIGS. 1, 7 to 9)

  However, in the thing of patent document 1, when a refrigerant | coolant is distribute | circulated through the inside of a hollow side plate, corrosion prevention by a corrugated fin cannot be aimed at, but we are anxious about a fall of corrosion resistance. Even when the hollow side plate is not used as a refrigerant circuit, if it is not brazed in contact with the header pipe, there will be an adverse effect of bending in the direction opposite to the bending direction during bending. When brazing abutting against, the end of the hollow side plate must be additionally processed along the header pipe, that is, arc-shaped processing or dimensional alignment processing for alignment, etc. There was concern.

  The present invention has been made in view of the above circumstances, and by using no side plate, it is possible to reduce the number of constituent members, to facilitate bending, and to maintain corrosion resistance and It is an object to provide a manufacturing method thereof.

  In order to solve the above-described problems, a heat exchanger according to the present invention includes a pair of header pipes each formed of an aluminum member, and a plurality of flat cross-sectional heat exchange pipes connected between the header pipes and parallel to each other. And an inner corrugated fin intervening between the heat exchange pipes, and an outer corrugated fin parallel to the inner corrugated fin on the outermost outer surface of the heat exchange pipe. The outer corrugated fin is provided with a deformed corrugated portion to give rigidity to the outer corrugated fin, and the heat exchange tube, the inner corrugated fin and the outer corrugated fin have a bent portion having the same curvature. (Claim 1).

  By configuring in this way, the outer corrugated fin can be provided with rigidity without using a protective side plate at the outermost part, and a bent portion can be provided in the heat exchanger body. Moreover, corrosion resistance can be given by the sacrificial anticorrosion function of the outer side corrugated fin provided in the outermost part.

  In the present invention, the deformed corrugated portion may be in any form as long as it has a function of imparting rigidity to the outer corrugated fin, for example, along the longitudinal direction of the outer corrugated fin at the corrugated top of the outer corrugated fin. The deformed waveform portion can be formed by the provided indentation (claim 2). In this case, the indentation may have any shape as long as it is formed along the longitudinal direction of the outer corrugated fin. For example, the indentation is formed on one line or a plurality of straight lines along the longitudinal direction of the outer corrugated fin. It may be done. Further, the deformed waveform portion can be formed by an inclined portion in which the outer corrugated fin is inclined in the same direction along the longitudinal direction. The deformed corrugated portion may be formed by a substantially V-shaped bent portion formed in each corrugated portion of the outer corrugated fin (Claim 4), or formed in the width direction of the outer corrugated fin. You may form in a wave shape bending part (Claim 5). Moreover, you may form a deformation | transformation waveform part in the waveform part which has a waveform height lower than the waveform height of an inner side corrugated fin.

  Moreover, the manufacturing method of the 1st heat exchanger of this invention is a manufacturing method of the heat exchanger of Claim 1, Comprising: A pair of said header pipe, a heat exchange pipe, an inner side corrugated fin, and an outer side corrugated fin are integrated. A step of joining, a step of pressing a restraining jig on the outer surface of the outer corrugated fin to form a deformed waveform portion on the outer corrugated fin, and the heat exchange tube, the inner corrugated fin and the outer corrugated fin with the same curvature. The step of forming the deformed corrugated portion temporarily fixes the pair of header pipes, heat exchange tubes, inner corrugated fins and outer corrugated fins, and the outer surface of the outer corrugated fins. A pair of header pipes, heat exchange, with a restraining jig made of a material having a smaller coefficient of thermal expansion than aluminum. The inner corrugated fin and the outer corrugated fin are integrally joined by heat brazing, and at the same time, a deformed waveform portion is formed by utilizing a difference in thermal expansion between the outer corrugated fin and the restraining jig. ). In this case, it is preferable to form an indentation along the longitudinal direction of the outer corrugated fin at the corrugated top of the outer corrugated fin by the step of forming the deformed corrugated portion (claim 8). The indentation may be formed on one line or a plurality of lines along the longitudinal direction of the outer corrugated fin.

  Further, in the manufacturing method of the present invention, the corrugated fin of the outer corrugated fin is formed by the step of forming the deformed corrugated portion by giving each corrugated portion of the outer corrugated fin previously inclined in the same direction along the longitudinal direction. You may make it form the inclination part which inclines in the same direction along the longitudinal direction of this outer side corrugated fin in a top part (Claim 9).

  By comprising in this way, a pair of header pipe, a heat exchange pipe, an inner corrugated fin, and an outer corrugated fin can be joined together, and a deformation wave part can be formed in an outer corrugated fin. In addition, a pair of header pipes, heat exchange tubes, inner corrugated fins and outer corrugated fins are integrally joined, and at the same time, a deformed corrugated portion is formed on the outer corrugated fins, and then the heat exchange tubes, inner corrugated fins and outer corrugated fins have the same curvature. The heat exchanger having a bent portion where the outer corrugated fins are not deformed by falling or the like can be produced by bending the outer corrugated fin.

  Further, another manufacturing method of the present invention is the manufacturing method of the heat exchanger according to any one of claims 1 or 3 to 6, wherein the pair of header pipes, the heat exchange tubes, the inner corrugated fins, A step of integrally joining the outer corrugated fin formed with the corrugated deformable portion, and a step of bending the heat exchange pipe, the inner corrugated fin and the outer corrugated fin to the same curvature. 10).

  By constituting in this way, after integrally joining the pair of header pipes, heat exchange pipes, inner corrugated fins and outer corrugated fins in which the corrugated deformation portions are formed in advance, the heat exchange pipes, inner corrugated fins and outer corrugated fins are By bending to the same curvature, it is possible to produce a heat exchanger having a bent portion in which the outer corrugated fin does not deform such as toppling.

  According to the present invention, the outer corrugated fin can be provided with rigidity without using a protective side plate on the outermost part, and the bent portion can be provided on the heat exchanger body. Therefore, it is possible to prevent deformation of the corrugated fin exposed to the outermost part and the like, and to easily manufacture a heat exchanger having a bent portion.

  Moreover, according to this invention, corrosion resistance can be provided by the sacrificial anticorrosion function of the outer corrugated fin provided at the outermost part, so that product deterioration can be suppressed and the lifetime can be increased.

It is a schematic perspective view (a) which shows the heat exchanger of 1st Embodiment concerning this invention, and the I section expansion perspective view (b) of (a). It is a principal part top view of the heat exchanger of 1st Embodiment. It is a schematic plan view which shows the state before joining the heat exchanger main body in this invention integrally. It is sectional drawing (a) in alignment with the II-II line | wire of FIG. 3, the principal part top view (b) which shows the deformation | transformation waveform part in this invention, and sectional drawing (c) of the modification of the restraint jig in this invention. It is a perspective view which shows the outer side corrugated fin in which the deformation | transformation waveform part was formed with the restraint jig in this invention, and this restraint jig. It is sectional drawing (a) of the set state using the restraint jig of another form, the principal part top view (b) which shows the deformation | transformation waveform part, and sectional drawing (c) of the modification of a restraint jig. It is a perspective view which shows the outer side corrugated fin in which the deformation | transformation waveform part was formed with the restraint jig | tool shown in FIG. 6, and this restraint jig. It is a schematic plan view which shows the bending process procedure of the heat exchanger of 1st Embodiment. It is a schematic perspective view which shows the heat exchanger of 2nd Embodiment. It is a principal part top view of the heat exchanger of 2nd Embodiment. It is a schematic plan view which shows the bending process procedure of the heat exchanger of 2nd Embodiment. It is a schematic perspective view which shows the heat exchanger of 3rd Embodiment. It is a principal part top view of the heat exchanger of 3rd Embodiment. It is a schematic plan view which shows the bending process procedure of the heat exchanger of 3rd Embodiment. It is a schematic perspective view which shows the heat exchanger of 4th Embodiment. It is a schematic perspective view (a) which shows the heat exchanger of 5th Embodiment concerning this invention, and the I section expansion perspective view (b) of (a). It is a principal part top view of the heat exchanger of 5th Embodiment. It is a principal part schematic plan view which shows the state before joining the heat exchanger main body of 5th Embodiment integrally. It is a schematic plan view which shows the bending process procedure of the heat exchanger of 5th Embodiment.

  Embodiments of a heat exchanger according to the present invention will be described below in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a schematic perspective view showing a heat exchanger according to a first embodiment of the present invention (a) and an enlarged perspective view (b) showing an I part of (a), and FIG. 2 is a heat view of the first embodiment. It is a principal part top view of an exchanger.

  The heat exchanger 1 includes a pair of header pipes 3a and 3b each formed of an aluminum member, and a plurality of flat cross-sectional heat exchange pipes 4 connected between the header pipes 3a and 3b and parallel to each other. Heat exchange in which inner corrugated fins 5 interposed between the heat exchange tubes 4 and outer corrugated fins 10 parallel to the inner corrugated fins 5 are integrally joined to the outermost outer surface of the heat exchange tubes 4 by brazing. A container body 2 is provided.

  Further, the outer corrugated fin 10 is provided with a deformed corrugated portion 20 to give the outer corrugated fin 10 rigidity, and the bent portion 30 having the same curvature is provided on the heat exchange tube 4, the inner corrugated fin 5 and the outer corrugated fin 10. Is provided. End caps (not shown) are attached to the upper and lower open ends of the header pipes 3a and 3b. Although not shown, the header pipes 3a and 3b are provided with a refrigerant inlet and a refrigerant outlet, respectively.

  In this case, the heat exchange tube 4 is formed in an extruded shape made of aluminum, for example, in the shape of a flat plate, and a refrigerant liquid flow path 4a (into a plurality of sections penetrating in the longitudinal direction) ( 4 and 6) are formed.

  The inner corrugated fin 5 is formed in a continuous wave shape by bending an aluminum brazing sheet whose surface is clad (coated) with a brazing material, and is interposed between the heat exchange tubes 4. It is brazed.

  Similarly to the inner corrugated fin 5, the outer corrugated fin 10 is formed in a continuous wave shape by bending an aluminum brazing sheet clad (coated) with a brazing material on the surface, and the outermost heat corrugated fin 10. It is brazed to the outer surface of the exchange pipe 4. In an arbitrary portion along the longitudinal direction of the outer corrugated fin 10 in the corrugated top portion 11 of the outer corrugated fin 10, for example, in the center, a deformed corrugated portion 20 formed by an indentation formed by a method described later is formed in the longitudinal direction of the outer corrugated fin 10 It is provided on a straight line along one line. Thus, by providing the corrugated top portion 11 of the outer corrugated fin 10 with the deformed waveform portion 20 due to the indentation, the outer corrugated fin 10 can be given rigidity.

  Next, the manufacturing method of the heat exchanger of 1st Embodiment is demonstrated. First, as shown in FIG. 3, a pair of header pipes 3a and 3b are opposed to each other in parallel, and a heat exchange pipe 4 is arranged between the header pipes 3a and 3b in parallel with each other and connected to the header pipes 3a and 3b. The inner corrugated fins 5 are disposed between the heat exchange tubes 4, and the outer corrugated fins 10 are disposed on the outer surface of the outermost heat exchange tube 4. And in the state where the processing ridges 42 provided on the restraining jig 40 made of a material having a smaller coefficient of thermal expansion than aluminum, which is the material of the outer corrugated fin 10, for example, stainless steel, are in contact with the outer sides of the outer corrugated fins 10. In order to press the two restraining jigs 40 against the outer corrugated fins 10, they are set (temporarily fixed) by a stainless steel fixing restraining jig 400 that sandwiches both the restraining jigs 40.

  In this case, as shown in FIGS. 4A and 5, the restraining jig 40 is attached to one side surface of the restraining jig main body 41 made of a square pipe having a hollow cross section made of stainless steel. A single processing protrusion 42 is provided along the longitudinal direction. Note that a restraining jig body 41A made of a channel material having a U-shaped cross section may be used instead of the restraining jig body 41 made of a square pipe having a hollow rectangular cross section (see FIG. 4C). The inner corrugated fin 5 is disposed between the pair of header pipes 3 a and 3 b in a state where the processed protrusion 42 is in contact with the corrugated top 11 of the outer corrugated fin 10, and the outer corrugated fin 42 is disposed on the outer surface of the outermost heat exchange tube 4. The outer corrugated fin 10 is placed and set.

  Next, the temporarily fixed header pipes 3a and 3b, the heat exchange pipe 4, the inner corrugated fin 5, the outer corrugated fin 10 and the restraining jig 40 are accommodated in a furnace (not shown) and heated to a predetermined temperature, for example, 600 ° C. Then, the header pipes 3a and 3b, the heat exchange pipe 4, the inner corrugated fins 5 and the outer corrugated fins 10 are integrally brazed (integrated joint) to produce the heat exchanger body 2. At this time, the deformed waveform portion 20 is formed by utilizing the difference in thermal expansion between the outer corrugated fin 10 made of aluminum, the restraining jig 40 made of stainless steel, and the restraining jig 400 made of stainless steel. In other words, due to the difference in thermal expansion between the outer corrugated fin 10 made of aluminum, the restraining jig 40 made of stainless steel, and the restraining jig 400 made of stainless steel, the processing ridge 42 of the restraining jig 40 has a waveform of the outer corrugated fin 10. The deformed waveform portion 20 is formed by biting into the top portion 11 and leaving an indentation (see FIGS. 4B and 5). Therefore, the deformed corrugated portion 20 can be formed in the outer corrugated fin 10 simultaneously with the integral brazing (integrated joining) of the header pipes 3a and 3b, the heat exchange tube 4, the inner corrugated fin 5 and the outer corrugated fin 10.

  In addition, although the said embodiment demonstrated the case where the deformation | transformation waveform part 20 was formed in one line of indentation provided on the straight line of 1 row along the longitudinal direction of the center part of the outer corrugated fin 10, a deformation | transformation waveform part is demonstrated. A plurality may be formed. For example, as shown in FIGS. 6A and 7, a plurality of, for example, two strips along the longitudinal direction of the restraining jig body 41 are formed on one side surface of the restraining jig body 41 made of a square pipe having a hollow rectangular cross section. 42 A of convex ridges may be provided, and the deformation | transformation waveform part 20A which consists of two indentations parallel to each other may be provided in the waveform top part 11 of the outer corrugated fin 10 by these two processed protrusions 42A. Further, instead of the restraining jig main body 41 made of a square pipe, as shown in FIG. 6 (c), the projecting protrusions are formed at the front ends of the opening side both side pieces of the restraining jig main body 41a made of a channel material having a U-shaped cross section. You may make it provide the deformation | transformation waveform part 20A which consists of two parallel impressions in the waveform top part 11 of the outer corrugated fin 10 using the restraining jig | tool 40A which formed the stripe | line 42A.

  As described above, the header pipes 3a and 3b, the heat exchange pipe 4, the inner corrugated fins 5 and the outer corrugated fins 10 are integrally brazed, and one or a plurality of, for example, two deformed corrugated portions are formed on the outer corrugated fins 10. After forming 20 and 20A, the bending part 30 is provided in the heat exchanger main body 2 brazed integrally.

  In order to provide the bending portion 30 in the heat exchanger main body 2, first, as shown in FIG. 8A, the bending die 50 is brought into contact with the inner peripheral side of the bending surface of the heat exchange tube 4 of the heat exchanger main body 2. Next, one header pipe 3a of the heat exchanger main body 2 is fixed and held by a fixing jig (not shown), and the other header pipe 3b is clamped by a bending drive unit of a bending device (not shown) toward the bending die 50. The bent portion 30 having a predetermined angle, for example, 45 °, 90 °, etc. is formed in the heat exchanger body 2 by pressing (see FIGS. 8B and 8C). In this bending process, the outer corrugated fin 10 is provided with one or more deformed waveform portions 20 and 20A along the longitudinal direction of the outer corrugated fin 10, so that the outer corrugated fin 10 has rigidity. In addition, the outer corrugated fin 10 exposed to the outermost part can be prevented from being deformed and the heat exchanger having a bent portion can be easily manufactured.

<Second Embodiment>
FIG. 9 is a schematic perspective view showing a second embodiment of the heat exchanger according to the present invention, and FIG. 10 is a plan view of the main part of the heat exchanger of the second embodiment.

  In the heat exchanger 1B of the second embodiment, instead of the outer corrugated fin 10 of the first embodiment, a deformed waveform portion 20B is formed by a substantially V-shaped bent portion 21 formed in advance on each waveform portion 12 of the outer corrugated fin 10B. Is formed. That is, the outer corrugated fins 10B are rigidly formed by forming the corrugated portions 12B of the outer corrugated fins 10B by the bent portions 21 bent in a substantially V shape along the longitudinal direction of the outer corrugated fins 10B. It is a case where it is made to give.

  In order to manufacture the heat exchanger 1B of the second embodiment, the pair of header pipes 3a and 3b are opposed to each other in parallel, and the heat exchange pipe 4 is disposed in parallel between the header pipes 3a and 3b. , 3b, the inner corrugated fin 5 is disposed between the heat exchange tubes 4, and the outer corrugated fin 10B in which the deformed waveform portion 20B is formed in advance on the outer surface of the outermost heat exchange tube 4 is disposed. Set (temporarily fix) with a fixing jig.

  Next, the temporarily fixed header pipes 3a and 3b, the heat exchange pipe 4, the inner corrugated fin 5, the outer corrugated fin 10B, and the restraining jig 40 are accommodated in a furnace (not shown) and heated to a predetermined temperature, for example, 600 ° C. Then, the header pipes 3a and 3b, the heat exchange pipe 4, the inner corrugated fins 5 and the outer corrugated fins 10B are integrally brazed (integrated joint) to produce the heat exchanger body 2B.

  Next, as described above, the bent portion 30 is provided in the heat exchanger body 2B in which the header pipes 3a and 3b, the heat exchange tubes 4, the inner corrugated fins 5 and the outer corrugated fins 10B are integrally brazed.

  In order to provide the bending portion 30 in the heat exchanger main body 2B, first, as shown in FIG. 11A, the bending die 50 is brought into contact with the inner peripheral side of the bending surface of the heat exchange pipe 4 of the heat exchanger main body 2B. Next, one header pipe 3a of the heat exchanger main body 2 is fixed and held by a fixing jig (not shown), and the other header pipe 3b is clamped by a bending drive unit of a bending device (not shown) toward the bending die 50. The bent portion 30 having a predetermined angle, for example, 45 °, 90 °, etc. is formed in the heat exchanger main body 2 by pressing (see FIGS. 11B and 11C). In this bending process, the outer corrugated fin 10B is provided with the deformed waveform portion 20B composed of the substantially V-shaped bent portion 21, so that the outer corrugated fin 10B can be provided with rigidity and exposed to the outermost portion. It is possible to prevent the outer corrugated fin 10B from being deformed, for example, from falling down, and to easily manufacture a heat exchanger having a bent portion.

  In the second embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.

<Third Embodiment>
FIG. 12 is a schematic perspective view showing a third embodiment of the heat exchanger according to the present invention, and FIG. 13 is a plan view of the main part of the heat exchanger of the third embodiment.

  1C of heat exchangers of 3rd Embodiment replace with the outer corrugated fin 10B of 2nd Embodiment, and when the deformation | transformation waveform part 20C is formed by the waveform-shaped bending part 22 previously formed in the width direction of the outer corrugated fin 10C It is. That is, each corrugated portion 12 of the outer corrugated fin 10C is made to have rigidity by forming the deformed corrugated portion 20C by the corrugated bent portion 22 formed in the width direction of the outer corrugated fin 10C. This is the case.

  In order to manufacture the heat exchanger 1C of the third embodiment, the pair of header pipes 3a and 3b are opposed to each other in parallel, and the heat exchange pipes 4 are arranged in parallel between the header pipes 3a and 3b. , 3b, the inner corrugated fins 5 are disposed between the heat exchange tubes 4, and the outer corrugated fins 10C in which the deformed waveform portions 20C are formed in advance on the outer surface of the outermost heat exchange tube 4 are disposed. Set (temporarily fix) with a fixing jig.

  Next, the temporarily fixed header pipes 3a and 3b, the heat exchange pipe 4, the inner corrugated fin 5, the outer corrugated fin 10C, and the restraining jig 40 are accommodated in a furnace (not shown) and heated to a predetermined temperature, for example, 600 ° C. Then, the header pipes 3a and 3b, the heat exchange pipe 4, the inner corrugated fins 5 and the outer corrugated fins 10C are integrally brazed (integrated joint) to produce the heat exchanger body 2C.

  Next, as described above, the bent portion 30 is provided in the heat exchanger body 2C in which the header pipes 3a and 3b, the heat exchange tubes 4, the inner corrugated fins 5 and the outer corrugated fins 10C are brazed together.

  In order to provide the bending portion 30 in the heat exchanger body 2C, first, as shown in FIG. 14A, the bending die 50 is brought into contact with the inner peripheral side of the bending surface of the heat exchange tube 4 of the heat exchanger body 2C. Next, one header pipe 3a of the heat exchanger main body 2 is fixed and held by a fixing jig (not shown), and the other header pipe 3b is clamped by a bending drive unit of a bending device (not shown) toward the bending die 50. The bent portion 30 having a predetermined angle, for example, 45 °, 90 °, etc. is formed in the heat exchanger main body 2C by pressing (see FIGS. 14B and 14C). In this bending process, the outer corrugated fin 10C is provided with the deformed corrugated portion 20C formed of the wave-shaped bent portion 22, so that the outer corrugated fin 10C can have rigidity and is exposed to the outermost portion. It is possible to prevent deformation of the fin 10 </ b> C and the like, and to easily manufacture a heat exchanger having the bent portion 30.

  In the third embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.

<Fourth embodiment>
FIG. 15 is a schematic perspective view showing a fourth embodiment of the heat exchanger according to the present invention.

  In the heat exchanger 1D of the fourth embodiment, instead of the outer corrugated fins 10B and 10C of the second or third embodiment, the corrugated fin having a waveform height lower than that of the inner corrugated fin 5 in the outer corrugated fin 10D in advance. This is a case where the deformed waveform portion 20D is formed by the portion 23. That is, when each corrugated portion of the outer corrugated fin 10D is made to have rigidity by forming the deformed corrugated portion 20D with a corrugated height lower than the corrugated height of the inner corrugated fin 5, for example, 1/2. It is.

  In order to manufacture the heat exchanger 1D of the fourth embodiment, a pair of header pipes 3a and 3b are opposed to each other in parallel, and the heat exchange tubes 4 are arranged in parallel with each other between the header pipes 3a and 3b. , 3b, the inner corrugated fin 5 is disposed between the heat exchange tubes 4, and the outer corrugated fin 10D in which the deformed waveform portion 20D is previously formed on the outer surface of the outermost heat exchange tube 4 is disposed. Set (temporarily fix) with a fixing jig.

  And like the 1st-3rd embodiment, after making the bending die 50 contact | abut to the bending surface inner peripheral side of the heat exchange pipe | tube 4 of heat exchanger main body 2D, one header pipe 3a of the heat exchanger main body 2 is used. Is fixed and held by a fixing jig (not shown), and the other header pipe 3b is clamped by a bending drive unit of a bending device (not shown) and is pressed toward the bending die 50 so that the heat exchanger body 2 has a predetermined angle, for example, Bending portions 30 of 45 °, 90 °, etc. are formed. In this bending process, since the outer corrugated fin 10D is provided with the deformed waveform portion 20D including the corrugated portion 23 lower than the waveform height of the inner corrugated fin 5, the outer corrugated fin 10D can be provided with rigidity, and The outer corrugated fin 10D exposed to the outermost part can be prevented from being deformed such as falling, and a heat exchanger having a bent portion can be easily manufactured.

  In the fourth embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.

<Fifth Embodiment>
FIG. 16 is a schematic perspective view (a) showing a heat exchanger of a fifth embodiment according to the present invention, an enlarged perspective view (b) showing a II part of (a), and FIG. 17 is a heat view of the first embodiment. It is a principal part top view of an exchanger.

  In the heat exchanger 1E of the fifth embodiment, instead of the outer corrugated fin 10 of the first embodiment, the outer corrugated fin 10E is deformed by an inclined portion 24 inclined in the same direction along the longitudinal direction of the outer corrugated fin 10E. This is a case where the portion 20E is formed. That is, the adjacent corrugated fins 10E are rigidly formed on the outer corrugated fins 10E by forming the deformed corrugated parts 20E by overlapping the adjacent corrugated parts 12 of the outer corrugated fins 10E with the inclined parts 24 inclined in the same direction along the longitudinal direction of the outer corrugated fins 10E. It is a case where it is made to have.

  In order to produce the heat exchanger 1E of the fifth embodiment, the same method as in the first embodiment can be used. For example, as shown in FIG. 18, each corrugated portion 12 of the outer corrugated fin 10 </ b> E is previously provided with a directivity that is inclined in the same direction along the longitudinal direction. Then, for example, a stainless steel restraining jig 40E for inclining each corrugated portion 12 of the outer corrugated fin 10E in the same direction is pressed and temporarily fixed on the outer surface of the outer corrugated fin 10E, and then accommodated in the furnace. The heat exchanger body 2E can be manufactured by brazing integrally (integral joining). At this time, the inclined portion 24 is utilized by utilizing a difference in thermal expansion between the outer corrugated fin 10E made of aluminum and a material having a smaller thermal expansion coefficient than aluminum, for example, a stainless steel restraining jig 40E and a stainless steel restraining jig 400. A deformed waveform portion 20E is formed.

  It should be noted that the inclination angle of the inclined portion 24 formed as described above is not so small, that is, the outer corrugated fin 10E is not excessively tilted, and after brazing, for example, a jig such as a roller (not shown) ) May be used to uniformly align all the waveform portions 12.

  The deformed corrugated portion 20E formed of the inclined portion 24 is utilized by utilizing the difference in thermal expansion between the aluminum outer corrugated fin 10E and the stainless steel restraining jig 40E and the stainless steel restraining jig 400 as described above. Instead of the forming method, the deformed waveform portion 20E including the inclined portion 24 may be formed in advance on the outer corrugated fin 10E.

  As described above, the header pipes 3a and 3b, the heat exchange pipe 4, the inner corrugated fins 5 and the side corrugated fins 10E are integrally brazed, and the deformed corrugated portions 20E are formed on the outer corrugated fins 10E. Similar to the fourth embodiment, the bent portion 30 is provided in the heat exchanger body 2E brazed integrally.

  That is, in order to provide the bending portion 30 in the heat exchanger main body 2E, first, as shown in FIG. 19A, the bending die 50 is applied to the inner peripheral side of the bending surface of the heat exchange pipe 4 of the heat exchanger main body 2E. Touch. Next, one header pipe 3a of the heat exchanger main body 2E is fixed and held by a fixing jig (not shown), and the other header pipe 3b is clamped by a bending drive unit of a bending device (not shown) toward the bending die 50. The bent portion 30 having a predetermined angle, for example, 45 °, 90 °, etc. is formed in the heat exchanger body 2 by pressing (see FIGS. 19B and 19C). In this bending process, the outer corrugated fin 10E is provided with the deformed corrugated portion 20E formed of the inclined portion 24. Therefore, the outer corrugated fin 10E can have rigidity, and the outer corrugated fin 10E exposed to the outermost part. It is possible to prevent deformation such as the falling of the heat exchanger and to facilitate the production of the heat exchanger having the bent portion 30.

  In the fifth embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.

<Other embodiments>
In the said embodiment, although the case where the angle of the bending part 30 of heat exchanger 1,1B, 1C, 1D, 1E was 45 degrees and 90 degrees was demonstrated, the bending part 30 of a heat exchanger is except 45 degrees and 90 degrees. Any angle may be used.

  In addition, although the said embodiment demonstrated the case where the louver was not provided in the inner side corrugated fin 5 and the outer side corrugated fins 10, 10B, 10C, 10D, 10E, these inner side corrugated fins 5 and outer side corrugated fins 10, 10B, Even when the louvers are provided at 10C, 10D, and 10E, the deformed waveform portions 20, 20A, 20B, 20C, 20D, and 20E can be formed in the same manner as described above.

1, 1B, 1C, 1D, 1E Heat exchanger 2, 2B, 2C, 2D, 2E Heat exchanger body 3a, 3b Header pipe 4 Heat exchange pipe 5 Inner corrugated fin 10, 10B, 10C, 10D, 10E Outer corrugated fin 11 waveform top part 12 waveform part 20, 20A, 20B, 20C, 20D, 20E deformation waveform part 21 V-shaped bending part 22 wave shape bending part 23 low waveform part 24 inclined part 30 bending part 40, 40A, 40E restraining jig 400 Fixing fixtures 42 and 42A Processing projection 50 Bending die

Claims (10)

A pair of header pipes each formed of an aluminum member, a plurality of flat cross-sectional heat exchange pipes connected between the header pipes and parallel to each other, and inner corrugated fins interposed between the heat exchange pipes A heat exchanger that is integrally joined,
The outermost corrugated fin parallel to the inner corrugated fin is provided on the outermost outer surface of the heat exchange tube, and the outer corrugated fin is provided with a deformed corrugated portion to make the outer corrugated fin rigid, and the heat exchange A heat exchanger characterized in that the pipe, the inner corrugated fin and the outer corrugated fin have bent portions having the same curvature. The heat exchanger according to claim 1, wherein
The heat exchanger, wherein the deformed corrugated portion is formed by an indentation provided along a longitudinal direction of the outer corrugated fin at a corrugated top portion of the outer corrugated fin. The heat exchanger according to claim 1, wherein
The heat exchanger according to claim 1, wherein the deformed waveform portion is an inclined portion that inclines the outer corrugated fin in the same direction along a longitudinal direction. The heat exchanger according to claim 1, wherein
The heat exchanger according to claim 1, wherein the deformed corrugated portion is a substantially V-shaped bent portion formed in each corrugated portion of the outer corrugated fin. The heat exchanger according to claim 1, wherein
The heat exchanger, wherein the deformed waveform portion is a wave-shaped bent portion formed in the width direction of the outer corrugated fin. The heat exchanger according to claim 1, wherein
The heat exchanger, wherein the deformed corrugated portion is a corrugated portion having a corrugated height lower than that of the inner corrugated fin. It is a manufacturing method of the heat exchanger of Claim 1, Comprising:
A step of integrally joining the pair of header pipes, heat exchange tubes, inner corrugated fins and outer corrugated fins;
Pressing a restraining jig on the outer surface of the outer corrugated fin to form a deformed waveform portion on the outer corrugated fin; and
Bending the heat exchange pipe, the inner corrugated fin and the outer corrugated fin to the same curvature, and
The step of forming the deformed corrugated portion temporarily fixes the pair of header pipes, heat exchange tubes, inner corrugated fins and outer corrugated fins, and uses a material having a smaller thermal expansion coefficient than aluminum on the outer surface of the outer corrugated fins. In a state where the restraining jig is pressed, the pair of header pipes, heat exchange tubes, inner corrugated fins and outer corrugated fins are integrally joined by heat brazing, and at the same time, the thermal expansion difference between the outer corrugated fins and the restraining jig A method of manufacturing a heat exchanger, characterized in that a deformed waveform portion is formed by using the method. In the manufacturing method of the heat exchanger of Claim 7,
An indentation is formed along the longitudinal direction of the outer corrugated fin at the corrugated top of the outer corrugated fin by the step of forming the deformed corrugated portion. In the manufacturing method of the heat exchanger of Claim 7,
The longitudinal direction of the outer corrugated fin at the corrugated top of the outer corrugated fin is obtained by providing the corrugated portions of the outer corrugated fin in advance with the same inclination in the longitudinal direction in advance. A method of manufacturing a heat exchanger, characterized in that an inclined portion inclined in the same direction is formed. A method of manufacturing a heat exchanger according to any one of claims 1 or 3 to 6,
A step of integrally joining the pair of header pipes, the heat exchange tubes and the inner corrugated fins, and the outer corrugated fins in which the waveform deformed portions are formed in advance;
Bending the heat exchange pipe, the inner corrugated fin and the outer corrugated fin to the same curvature,
The manufacturing method of the heat exchanger characterized by the above-mentioned.

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