JP2014214898A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of reducing weight, increasing the degree of freedom of shapes of inner fins, and also reducing material cost.SOLUTION: A flat hollow body 2 of a heat exchanger comprises: two flat plates 12 and 16; and end members 21 joined to both longitudinal end portions of each of the two flat plates 12 and 16. Inner fins 26 formed separately from the two flat plates 12 and 16 are arranged in the flat hollow body 2. A sidewall formation portion 14 of the first flat plate 12 is located inside of a sidewall formation portion 19 of the second flat plate 16 on one of sidewalls 9 of the flat hollow body 2, and a sidewall formation portion 18 of the second flat plate 16 is located inside of a sidewall formation portion 15 of the first flat plate 12 on the other sidewall 9 thereof. Positional deviation prevention members 24 protruding toward longitudinal central portions of the two flat plates 12 and 16, formed along inner surfaces of the inner sidewall formation portions 14 and 18 located inside among the sidewall formation portions 14, 15, 18, and 19 of the two flat plates 12 and 16, and joined to the inner sidewall formation portions 14 and 18 are provided in end wall formation portions 22 of the end members 21.

Description

  The present invention relates to a heat exchanger used as an oil cooler, aftercooler, radiator, or the like of industrial machines such as compressors, machine tools, and hydraulic equipment.

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

  As a heat exchanger used in oil coolers, aftercoolers, radiators, etc., a plurality of flat hollow bodies arranged at intervals from each other and an aluminum extruded profile spacer arranged between both ends of adjacent flat hollow bodies And both ends of adjacent flat hollow bodies are made to communicate with each other through communication holes formed in the spacer, and the flat hollow bodies are made of a pair of aluminum brazing sheets having brazing filler metal layers on both sides. The flow path forming body is made of an extruded aluminum material that is disposed between the flat plates and brazed to both the flat plates, and through holes that lead to the communication holes of the spacer are formed at both ends of both flat plates. The formed body is integrally formed across the side bars arranged between the side edges of both flat plates and the intermediate portion in the height direction of the flat hollow body in both side bars. There is known an inner fin and an end bar that is integrally formed at both ends of both side bars, extends inward in the width direction of the flat hollow body, and is brazed with the tips abutting each other. (See Patent Document 1).

  The flow path forming body of the heat exchanger described in Patent Literature 1 is formed integrally between a pair of linear side bars and an intermediate portion in the vertical direction of both side bars and for forming inner fins over the entire length of the side bars. An aluminum extruded section made of a flat plate portion is manufactured, then both end portions of the flat plate portion are cut out over a predetermined length, and then an inner fin is formed by pressing the flat plate portion, and then both sides are formed. It is manufactured by bending both end portions of the bar inward and abutting the ends to form both end bars (see FIG. 4 of Patent Document 1).

  However, in the heat exchanger described in Patent Document 1, since the flow path forming body is made of an aluminum extruded shape, the weight increases, and the weight of the entire heat exchanger increases accordingly. Further, the side bars and the inner fins in the flow path forming body of the heat exchanger described in Patent Document 1 are integrally formed, and the inner fins are formed by pressing a flat plate portion for forming the inner fins. Therefore, there is a limit to the degree of freedom of the shape, and it is not possible to obtain an optimal shape that can improve the performance of the heat exchanger. Furthermore, when manufacturing the flow path forming body, both end portions of the inner fin-forming flat plate portion are cut out over a predetermined length, so that the material cost increases.

JP 2010-127557 A

  An object of the present invention is to provide a heat exchanger that can solve the above problems, reduce the weight, increase the degree of freedom of the shape of the inner fin, and further reduce the material cost. is there.

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

1) It has a plurality of flat hollow bodies arranged at intervals, and spacers arranged between both ends of adjacent flat hollow bodies, and adjacent flat hollow bodies are at least one spacer. A pair of rectangular flat walls in which the flat hollow bodies are arranged at intervals and are formed with through holes leading to the communication holes of the spacer, and both flat surfaces are communicated by the formed communication holes. In a heat exchanger comprising a pair of side walls provided between long sides of a wall and a pair of end walls provided between short sides of both flat walls,
The flat hollow body is provided on the vertical rectangular flat wall forming portion that forms one flat wall of the flat hollow body, and on both long sides of the flat wall forming portion, and protrudes in the same direction, and the side wall of the flat hollow body is A first flat plate having a side wall forming portion to be formed, a vertical rectangular flat wall forming portion that is disposed at a distance from a flat wall forming portion of the first flat plate and forms the other flat wall of the flat hollow body, and a flat wall A second flat plate provided on both long side portions of the forming portion and protruding in the same direction and joined in a superimposed state to the side wall forming portion of the first flat plate and having a side wall forming portion forming the side wall of the flat hollow body; The flat wall forming part of both flat plates and the two end members having end wall forming parts which are joined to both ends in the longitudinal direction of the side wall forming part and form end walls of the flat hollow body. The side wall forming portion of the first flat plate is the second flat side. The side wall forming portion of the second flat plate is positioned inside the side wall forming portion of the first flat plate on the other side wall, and both end wall forming portions of the end member are connected to both end wall forming portions. A misalignment prevention member is provided that protrudes toward the longitudinal center portion of the flat plate and extends along the inner surface of the inner side wall forming portion located on the inner side of the side wall forming portions of both flat plates and joined to the inner side wall forming portion. A heat exchanger in which inner fins formed separately from both flat plates are arranged in a hollow body and joined to flat wall forming portions of both flat plates.

  2) The height of the inner side wall forming portion located on the inner side of the two side wall forming portions of each flat plate is lower than the height of the outer side wall forming portion located on the outer side by the thickness of the flat wall forming portion of the other flat plate. The heat exchanger according to 1) above.

  3) At the peripheral edge portion of the end wall forming portion of the end member, an outward projecting portion is provided that projects outward from both longitudinal ends of the inner peripheral surface of the flat hollow body, and the outward projecting portion is formed of the flat hollow body. The heat exchanger as described in 1) or 2) above, which is bonded to both end faces in the longitudinal direction of both flat walls and both side walls.

  4) The heat exchanger according to any one of the above 1) to 3), wherein both end portions of the flat hollow body in the inner fin in the longitudinal direction are in contact with the position shift preventing members of both end members.

  According to the heat exchangers of 1) to 4) above, the flat hollow body is provided on the vertical rectangular flat wall forming portion that forms one flat wall of the flat hollow body, and on both long sides of the flat wall forming portion. A first flat plate having a side wall forming portion that protrudes in the same direction and forms a side wall of the flat hollow body, and the other flat wall of the flat hollow body that is spaced from the flat wall forming portion of the first flat plate A flat rectangular wall-forming portion that forms a rectangular shape, and is provided on both long sides of the flat wall-forming portion and protrudes in the same direction, and is joined to the side wall-forming portion of the first flat plate in an overlapping state, and is a flat hollow body A second flat plate having a side wall forming portion for forming the side wall, and a flat wall forming portion of both flat plates and an end wall forming portion for forming an end wall of the flat hollow body joined to both longitudinal ends of the side wall forming portion. It consists of two end members and has a flat hollow body, which is formed separately from both flat plates. Since the formed inner fin is arranged and joined to the flat wall forming part of both flat plates, the weight of the flat hollow body and the inner fin can be reduced to the minimum, and the shape of the inner fin can be freely set. The shape can be optimized to increase the degree of performance and improve the performance of the heat exchanger. Further, unlike the heat exchanger described in Patent Document 1, less material is removed when the flow path forming body is formed, and the material cost can be reduced. Moreover, the side wall forming portion of the first flat plate is located inside the side wall forming portion of the second flat plate on one side wall of the flat hollow body, and the side wall forming portion of the second flat plate is the first flat plate on the other side wall. Of the inner side wall forming portion located on the inner side of the side wall forming portions of both flat plates. Since the position shift prevention member is provided along the inner surface and joined to the inner side wall forming portion, the side wall forming portions of the two flat plates are brazed to each other, the two flat plates and the end member, and the two flat plates and the inner fin. In this state, if the position shift prevention member of the end member is placed along the inner surface of the inner side wall forming portion located on the inner side among the side wall forming portions of both the flat plates, the positional shift in the width direction of both the flat plates is prevented. , Both slabs and It is possible to easily temporarily fixed and de member, it is possible to suppress the positional displacement of the flat plates and the end member at the time of manufacture of the heat exchanger.

  According to the heat exchanger of 2) above, the height of the flat hollow body can be made uniform throughout.

  According to the heat exchanger of the above 3), at the time of manufacturing the heat exchanger, it is possible to position the insertion position when inserting the displacement preventing member of the end member between both flat plates.

  According to the heat exchanger of the above 4), it is possible to prevent displacement of the inner fin in a state before the side wall forming portions of both flat plates are brazed to both the flat plates and the end member, and both the flat plates and the inner fin. Can do.

It is a perspective view which shows the whole structure of the oil cooler for industrial machines to which the heat exchanger by this invention is applied. It is a disassembled perspective view which shows a part of oil cooler of FIG. It is an AA line expanded sectional view of FIG. It is a BB line expanded sectional view of Drawing 1. It is a fragmentary perspective view which shows how to combine both the flat plates, both end members, and an inner fin at the time of manufacturing the oil cooler of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the heat exchanger according to the present invention is applied to an oil cooler for an industrial machine.

  FIG. 1 shows the overall configuration of an oil cooler for industrial machinery to which a heat exchanger according to the present invention is applied, and FIGS. 2 to 4 show the configuration of the main part thereof. FIG. 5 shows one process in manufacturing the oil cooler.

  In the description of the oil cooler, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIG. 1, the right side in FIGS. 3 and 4) is the front, the opposite side is the rear, and the front is viewed from the rear. The upper and lower sides and the right and left sides are called up and down and left and right.

  Note that the top, bottom, left and right and front and rear are defined for convenience, and the top and bottom, left and right, and front and back may be interchanged.

  In FIG. 1, an oil cooler (1) used in an industrial machine includes an aluminum flat hollow body (2) for high-temperature oil distribution that is arranged in parallel in the vertical direction and extends in the horizontal direction. Aluminum bare spacers (3) placed between the left and right ends of adjacent flat hollow bodies (2) and brazed to the flat hollow bodies (2), and adjacent flat hollow bodies between the left and right spacers (3) A corrugated aluminum outer fin (5) disposed in the ventilation gap (4) between (2) and brazed to the flat hollow body (2).

  Solid block-shaped aluminum bear fin arrangement space forming members on the upper surfaces of the left and right ends of the flat hollow body (2) at the upper end and the lower surfaces of the left and right ends of the flat hollow body (2) of the lower end of the oil cooler (1), respectively. (6) is arranged and brazed to the flat hollow body (2). On the upper side of the flat hollow body (2) at the upper end and the lower side of the flat hollow body (2) at the lower end, an aluminum outer fin (5) is also arranged between the left and right fin arrangement space forming members (6), and the flat hollow body It is brazed to the body (2). Side plates (7) made of an aluminum brazing sheet having brazing material layers on both sides are arranged on the outer sides of the upper and lower outer fins (5) in the vertical direction, and the outer fins (5) and fin arrangement space forming members ( It is brazed to 6). A ventilation gap (4) is also formed between the flat hollow bodies (2) at the upper and lower ends and the side plates (7).

  As shown in FIGS. 2 to 4, the flat hollow body (2) is formed between a pair of rectangular flat walls (8) that are spaced apart from each other and the long sides of both flat walls (8). And a pair of end walls (11) provided between the short sides of the two flat walls (8). The flat hollow body (2) is one of the flat hollow bodies (2), here both the vertical rectangular flat wall forming part (13) and the flat wall forming part (13) forming the upper flat wall (8). A first flat plate (12) having two side wall forming portions (14), (15) provided on the long side portion and projecting in the same direction and forming the side wall (9) of the flat hollow body (2); A flat rectangular wall forming portion (17) which is spaced apart from the flat wall forming portion (13) of the flat plate (12) and forms the other flat wall (8) of the flat hollow body (2), and flat It is provided on both long sides of the wall forming portion (17) and protrudes in the same direction, and is joined to the side wall forming portions (14) and (15) of the first flat plate (12) in an overlapping state, and is a flat hollow body ( 2) The second flat plate (16) having the side wall forming portions (18) and (19) forming the side wall (9), and the short flat plate forming portions (13) and (17) of both flat plates (12) and (16). The side and side wall forming portions (14), (15), (18), and (19) are joined to both longitudinal ends, and form the end wall (11) of the flat hollow body (2). Becomes more and two end members (21) having an end wall forming portion (22) to be. Both flat plates (12) and (16) are each formed of an aluminum brazing sheet having a brazing filler metal layer on both sides.

  Through-holes are formed in both longitudinal ends of both flat walls (8) of the flat hollow body (2), that is, in both longitudinal ends of the flat wall forming portions (13) and (17) of both flat plates (12) and (16). 23) is formed.

  In one side wall (9) of the flat hollow body (2), here, in the front side wall (9), the front side wall forming portion (14) of the first flat plate (12) is the front side wall of the second flat plate (16). Located on the inside of the forming portion (19), on the other hand, in this case, in the rear side wall (9), the rear side wall forming portion (18) of the second flat plate (16) is behind the first flat plate (12). It is located inside the side wall forming part (15) on the side. Of the two side wall forming parts (14) (15) and (18) (19) of each flat plate (12) (16), the height of the inner side wall forming parts (14) (18) located inside is also outward The height of the flat side wall forming portions (17) and (13) of the other flat plates (16) and (12) is lower than the height of the positioned outer side wall forming portions (15) and (19). That is, the height of the front side wall forming portion (14) of the first flat plate (12) is equal to the height of the flat wall forming portion (17) of the second flat plate (16) than the height of the rear side wall forming portion (15). The height of the rear side wall forming portion (18) of the second flat plate (16) is lower than the height of the front side wall forming portion (19) of the flat wall forming portion (13) of the first flat plate (12). It is lower by the thickness.

  On the inner surface of the end wall forming portion (22) of the end member (21), the inner side wall protrudes toward the center in the longitudinal direction of both flat plates (12) and (16) and is located inside the flat plates (12) and (16). A misalignment preventing member (24) brazed to the inner side wall forming portions (14) and (18) is provided along the inner surfaces of the forming portions (14) and (18). The tip of the misalignment prevention member (24) is located at the same position as the longitudinal side central edge of the flat wall (8) in the through hole (23), or on the longitudinal central side of the flat wall (8). In position. Further, the peripheral edge of the end member (21) projects outward, and the outward projecting portions (25) are both end surfaces in the longitudinal direction of the flat wall forming portions (13) and (17) of both flat plates (12) and (16). The both side wall forming portions (14), (15), (18), and (19) are brazed to both end surfaces in the longitudinal direction. The outward projecting portion (25) protrudes outward from both longitudinal end surfaces of the flat wall forming portions (13) and (17) and from both longitudinal end surfaces of the both side wall forming portions (14), (15), (18) and (19). Preferably not.

  In the flat hollow body (2), the inner fins (26) formed separately from the flat plates (12) and (16) are arranged, and the flat wall forming portions (13) of the flat plates (12) and (16) ( 17) is brazed. Both ends of the inner fin (26) are in contact with the tip of the position shift prevention member (24) of the end member (21). The inner fin (26) includes a flat horizontal plate-shaped wave crest (28) extending in the front-rear direction, a flat horizontal plate-shaped wave bottom (29) extending in the front-rear direction, and a wave crest (28) and a wave bottom (29). On a straight belt-like zone having a flat vertical plate-like connecting part (31) connecting the two, and the wave crest part (28) and the wave bottom part (29) extending in the front-rear direction as viewed from above and having a certain width. Are formed by connecting a plurality of corrugated plates (27) in the left-right direction and integrally connected to each other, and the wave crests of two corrugated plates (27) adjacent in the left-right direction ( 28) The wave bottoms (29) are misaligned in the front-rear direction. Here, the wave crest (28), wave bottom (29) and connecting part (31) of the right corrugated plate (27) of the two corrugated plates (27) arranged in the horizontal direction are the left corrugated plate (27). Deviation forward of the wave crest (28) and wave bottom (29) in the longitudinal direction of the wave crest (28), wave bottom (29) and connecting part (31) of the plate (27) by 1/2. In addition, the wave crests (5) and the wave bottoms (29) of both corrugated plates (27) are connected and integrated. Therefore, the inner fin (26) is formed by connecting and integrating the wave crests (28) of a plurality of corrugated plates (27) arranged continuously, and from the front edge toward the rear edge. A crest row located on a line inclined to the left end side and a wave bottom portion (29) of a plurality of continuous corrugated plates (27) are connected and integrated, and the front side edge in the width direction To the rear edge, wave crest rows and wave crest rows located on a line inclined in the same direction are provided alternately.

  The spacer (3) is made of extruded aluminum, so that the communication hole (32) leading to the through hole (23) of the flat wall (8) of the flat hollow body (2) matches the through hole (23). Is formed. In addition, the left side surface of the spacer (3) disposed between the left end of the flat hollow body (2) at the upper end and the flat hollow body (2) adjacent to the lower one leads to the inside of the communication hole (32). Thus, the aluminum oil inlet pipe (33) is connected by brazing, and the spacer (2) disposed between the right end of the flat hollow body (2) at the lower end and the flat hollow body (2) adjacent to the upper one ( An aluminum oil outlet pipe (34) is connected to the right side surface of 3) by brazing so as to communicate with the inside of the communication hole (32) (see FIG. 1).

  A method of manufacturing the oil cooler (1) will be described with reference to FIG.

  First, a first flat plate (12) having a flat wall forming portion (13), side wall forming portions (14) (15) and a through hole (23) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides. ), A second flat plate (16) having a flat wall forming portion (17), a side wall forming portion (18) (19) and a through hole (23), an end wall forming portion (22), and a misalignment prevention member (24 ) And an end member (21) made of an aluminum bare material having an outward projecting portion (25), and an inner fin (26). A spacer (3) having a communication hole (32), a ventilation gap forming member (6), an outer fin (5), and a side plate (7) are prepared.

  Next, the two flat plates (12) and (16) are connected to the first flat plate (12) with the inner fin (26) interposed between the flat wall forming portions (13) and (17) of the flat plates (12) and (16). ) Is overlapped with the inside of the front side wall forming portion (19) of the second flat plate (16), and the rear side wall forming portion (18) of the second flat plate (16) is the first flat plate (16). 12) Combine so as to overlap the inside of the rear side wall forming portion (15) (see FIGS. 5A and 5B). Next, the position shift prevention member (24) of the end member (21) is inserted into the opening on both ends of both the flat plates (12) and (16), and along the inner surfaces of the inner side wall forming portions (14) and (18) located inside. And a combination of the flat plates (12) (16), the end member (21) and the inner fin (26) with the tip of the displacement prevention member (24) being brought into contact with both ends of the inner fin (26). (35) is obtained (see FIG. 5 (c)). In this combined body (35), the lateral displacement of both the flat plates (12), (16) and the both flat plates (12), (16) of the inner fin (26) is prevented, and both the flat plates (12), (16) ) And the end member (21) are temporarily fixed, and further, displacement of the inner fin (26) in the longitudinal direction is prevented.

  Next, the combination body (35) is arranged at an interval in the vertical direction, and the spacer (3) is formed so that the communication hole (32) communicates with the flat plate through hole (23) between both ends of the adjacent combination body (35). ) And the ventilation gap forming members (6) are respectively disposed at the left and right ends of the outer surface in the vertical direction of the combined body (35) at the upper and lower ends. In addition, outer fins (5) are arranged between adjacent combinations (35) and on the outer side in the vertical direction of the combination (353) at both upper and lower ends, and side plates (7) are disposed on the outer sides of the outer fins (5) at both upper and lower ends. Place. Further, by combining the oil inlet pipe (33) and the outlet pipe (34), all parts are temporarily fixed by appropriate means.

  Thereafter, the side wall forming portions (14) (19) and (15) (18) of both flat plates (12) and (16) of each combination (35), and both flat plates (12) and (16) and end members (21 ) And the inner fin (26) to form a flat hollow body (2), the flat hollow body (2) and the spacer (3), the flat hollow body (2) at both upper and lower ends and the ventilation gap forming member (6) The flat hollow body (2) and the outer fin (5) and the outer fin (5) and the side plate (7) are brazed. Thus, the oil cooler (1) is manufactured.

  The heat exchanger according to the present invention is suitably used as an oil cooler for industrial machinery, for example.

(1): Oil cooler
(2): Flat hollow body
(3): Spacer
(8): Flat wall
(9): Side wall
(11): End wall
(12): 1st flat plate
(13): Flat wall forming part
(14) (15): Side wall forming part
(16): Second plate
(17): Flat wall forming part
(18) (19): Side wall forming part
(21): End member
(22): End wall forming part
(23): Through hole
(24): Misalignment prevention member
(25): Outward projecting part
(26): Inner fin
(32): Communication hole

Claims (4)

A plurality of flat hollow bodies arranged at intervals from each other and spacers arranged between both ends of adjacent flat hollow bodies are provided, and adjacent flat hollow bodies are formed in at least one spacer. A pair of rectangular flat walls in which flat hollow bodies are arranged at intervals and in which through holes communicating with the communication holes of the spacer are formed, and the two flat walls are connected to each other. In a heat exchanger comprising a pair of side walls provided between long sides and a pair of end walls provided between short sides of both flat walls,
The flat hollow body is provided on the vertical rectangular flat wall forming portion that forms one flat wall of the flat hollow body, and on both long sides of the flat wall forming portion, and protrudes in the same direction, and the side wall of the flat hollow body is A first flat plate having a side wall forming portion to be formed, a vertical rectangular flat wall forming portion that is disposed at a distance from a flat wall forming portion of the first flat plate and forms the other flat wall of the flat hollow body, and a flat wall A second flat plate provided on both long side portions of the forming portion and protruding in the same direction and joined in a superimposed state to the side wall forming portion of the first flat plate and having a side wall forming portion forming the side wall of the flat hollow body; The flat wall forming part of both flat plates and the two end members having end wall forming parts which are joined to both ends in the longitudinal direction of the side wall forming part and form end walls of the flat hollow body. The side wall forming portion of the first flat plate is the second flat side. The side wall forming portion of the second flat plate is positioned inside the side wall forming portion of the first flat plate on the other side wall, and both end wall forming portions of the end member are connected to both end wall forming portions. A misalignment prevention member is provided that protrudes toward the longitudinal center portion of the flat plate and extends along the inner surface of the inner side wall forming portion located on the inner side of the side wall forming portions of both flat plates and joined to the inner side wall forming portion. A heat exchanger in which inner fins formed separately from both flat plates are arranged in a hollow body and joined to flat wall forming portions of both flat plates. Of the two side wall forming parts of each flat plate, the height of the inner side wall forming part located on the inner side is lower than the height of the outer side wall forming part located on the outer side by the thickness of the flat wall forming part of the other flat plate. The heat exchanger according to claim 1. On the peripheral edge of the end wall forming portion of the end member, there are provided outward projecting portions that project outward from both longitudinal ends of the inner peripheral surface of the flat hollow body, and the outward projecting portions are flat on both sides of the flat hollow body. The heat exchanger according to claim 1 or 2, wherein the heat exchanger is joined to both longitudinal ends of the wall and both side walls. The heat exchanger according to any one of claims 1 to 3, wherein both end portions in the longitudinal direction of the flat hollow body in the inner fin are in contact with the position shift prevention members of both end members.

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