JP4621487B2 - Integrated heat exchanger - Google Patents

Description

  The present invention relates to an integrated heat exchange device that includes at least two of an oil cooler, an aftercooler, a radiator, and the like and is used in industrial machines such as a compressor, a machine tool, and a hydraulic device.

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

  Conventionally, as this type of integrated heat exchange device, a plurality of flat hollow bodies that are provided in parallel and spaced apart from each other and that have a flow passage inside, and at least one end portion of adjacent flat hollow bodies are provided. An oil cooler and an after cooler, which are arranged and have a communicating member passing through the flow paths of adjacent flat hollow bodies, are arranged in the thickness direction of the flat hollow body. In the ventilation gap between the hollow bodies, the cooling air flows in the width direction of the flat hollow body, and a spacer is arranged between the oil cooler and the after cooler to block the flow of fluid between the two. It is known (see Patent Document 1).

  In the integrated heat exchange device described in Patent Document 1, the flat hollow body is formed of a rectangular flat plate made of an aluminum brazing sheet that is spaced apart from each other and has a brazing filler metal layer on both sides, and both flat plates. The flow path forming body is made of aluminum brazed to a flat plate, and through holes are formed at both ends of the flat plate, and the flow path forming body extends between the peripheral edge portions of both flat plates, and both of the peripheral wall portions. It consists of a heat-transfer area expansion part provided so that the intermediate part of the length direction of two long side wall parts located between the long side edge parts of a flat plate may be connected.

However, in the conventional integrated heat exchanger, the flow of one of the high-temperature oil of the oil cooler and the high-temperature compressed air of the aftercooler stops, the cooler stops, and the flow of the other does not stop and the cooler operates. In this case, the temperature difference between the oil cooler and the aftercooler increases, and a large amount of heat is transferred from the operating side cooler where the fluid flow has stopped to the stopped side cooler where the fluid flow has stopped. Therefore, a relatively large thermal strain is generated in the flat plate constituting the flat hollow body located at the end of the operating side cooler in the stop side cooler, and there is a possibility that a large stress is generated in the flat plate.
JP 2001-82891 A

  The object of the present invention is to solve the above problem and to reduce the amount of heat transfer between these heat exchange parts even when the flow of high-temperature fluid in one of the two adjacent heat exchange parts stops. An object of the present invention is to provide an integrated heat exchange device that can be made smaller than conventional ones.

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

1) A flow of a plurality of flat hollow bodies that are provided in parallel and spaced apart from each other and that have a flow channel therein, and a flow of adjacent flat hollow bodies that are disposed between at least one end of adjacent flat hollow bodies. A plurality of heat exchanging portions each having a communication member that allows passages to pass through each other are arranged in the thickness direction of the flat hollow body, and the flat hollow body includes two rectangular wall portions facing each other, and both rectangular wall portions A peripheral wall portion straddling between the peripheral portions of the portion, a spacer is disposed between the adjacent flat hollow bodies of two adjacent heat exchange portions, and a heat transfer amount reduction portion formed of a through hole is formed in the spacer , An integrated type in which a low-temperature fluid flows between adjacent flat hollow bodies of each heat exchanging portion in the width direction of the flat hollow body, and a through-hole serving as a heat transfer amount reducing portion of the spacer extends in the width direction of the flat hollow body Heat exchange device .

2) The integrated heat exchange device according to 1) above, wherein a plurality of convex portions and / or concave portions extending in the length direction of the through hole are formed on the inner peripheral surface of the through hole serving as the heat transfer amount reducing portion of the spacer.

3) The flat hollow body of at least one heat exchanging portion has two rectangular wall portions spaced apart from each other, a peripheral wall portion straddling between the peripheral edges of both rectangular wall portions, and an inside of the flat hollow body. It consists of a partition wall section that divides into two flow paths extending in the length direction, and two through-holes that allow both the flow paths to the outside are flattened on both sides of the partition wall section at one end of both rectangular walls. It is formed at intervals in the width direction of the hollow body, the end on the opposite side to the through hole in the partition wall is cut away, and the two flow paths are communicated with each other to form a U-shaped flow path, The integrated heat exchange device according to 1) or 2) above, wherein the communication member is formed with two through-holes communicating with the two through-holes of both rectangular wall portions.

4) A flat hollow body having a U-shaped channel is formed by a rectangular flat plate arranged at a distance from each other, two linear side bars arranged between both long side edges of both flat plates, and both sides One intermediate bar that is spaced between these bars, two sidebars, two heat transfer area expansion sections that are integrated in the middle of the height across the intermediate bars, and both sidebars Each of which is integrally provided at one end and extending inward, and the tip is composed of an end bar brazed against both side surfaces of one end of the intermediate bar, and the other end of the intermediate bar is cut off. The end portions on the end bar side in both heat transfer area enlarged portions are respectively cut off, and through holes are formed in both side portions of the intermediate bar at the end portions on both end plates, and both rectangular walls are formed by both plates. Formed on both flat plates One short side wall portion of the peripheral wall portion is formed by bending the end portions opposite to each other to the other flat plate side and brazing these bent portions so as to overlap each other. The integrated heat exchange device according to 3) above, wherein two long side wall portions of the peripheral wall portion are formed by the side bar, and the other short side wall portion of the peripheral wall portion is formed by the end bar of the flow path forming body.

5) The integrated heat exchange device according to 4) above, wherein both flat plates are each made of an aluminum brazing sheet, and the flow path forming body is made of an aluminum extruded profile.

6) Two spacers in the flat hollow body having a U-shaped flow path have spacers arranged between the heat exchange section having a flat hollow body having a U-shaped flow path and the heat exchange section adjacent thereto. 6. The integrated heat exchange device according to any one of the above 3) to 5) , which is disposed at an end portion on the side where the flow paths communicate with each other.

7) In a heat exchanging section provided with a flat hollow body having a U-shaped flow path, two flow paths in a plurality of flat hollow bodies located on the side of another heat exchanging section adjacent to the heat exchanging section communicate with each other. The integrated heat exchange device according to 6) above, wherein a second spacer is disposed between the end portions on the side where the heat transfer is performed, and a heat transfer amount reducing portion is formed in the second spacer.

8) The integrated heat exchange device according to 7) above, wherein the heat transfer amount reducing portion of the second spacer is a through hole formed in the second spacer.

9) The integrated heat exchange device according to 8) above, wherein the through-hole serving as the heat transfer amount reducing portion of the second spacer extends in the width direction of the flat hollow body.

10) The integrated heat exchange device according to 9) above, wherein a plurality of convex portions and / or concave portions extending in the length direction of the through hole are formed on the inner peripheral surface of the through hole of the second spacer.

11) One of the two adjacent heat exchangers is one of an oil cooler, an aftercooler, and a radiator, and the other is any one of the other of the oil cooler, the aftercooler, and the radiator. The integrated heat exchange device according to any one of 1) to 10) above.

12) A compressor including the integrated heat exchange device according to any one of 1) to 11) above .

13) A machine tool comprising the integrated heat exchange device according to any one of 1) to 11) above .

14) A hydraulic device comprising the integrated heat exchange device described in any one of 1) to 11) above .

According to the integrated heat exchange device of 1) above, the flow of the high-temperature fluid in one of the two adjacent heat exchange units stops and the flow of the high-temperature fluid in the other heat exchange unit Even when the heat transfer is not stopped, the heat transfer amount of the spacer reduces the amount of heat transfer from the operating heat exchange section where the flow of high-temperature fluid is not stopped to the stop heat exchange section where the flow of high-temperature fluid stops. Compared to the integrated heat exchange device. Therefore, the thermal strain generated in the rectangular wall portion of the flat hollow body located at the end of the operation side heat exchange portion in the stop side heat exchange portion is reduced, and as a result, the stress generated in the rectangular wall portion is also reduced. This prevents damage.

According to the integrated heat exchange device of 1) above, the fluid that cools the high-temperature fluid that flows through the flat hollow body of the heat exchange part, for example, the cooling air flows through the through-hole that becomes the heat transfer reduction part of the spacer. The heat transferred from the heat exchange part to the spacer is taken away by the cooling air flowing in the through hole, and the amount of heat transferred to the stop side heat exchange part is further reduced. Accordingly, the thermal strain generated in the rectangular wall portion constituting the flat hollow body located at the end of the operation side heat exchange portion in the stop side heat exchange portion is further reduced, and as a result, the rectangular wall portion is not damaged. It is surely prevented.

According to the integrated heat exchange device of 2) above, the heat transferred from the operating side heat exchanging part to the spacer is more efficiently taken away by the cooling air flowing in the through hole, and the amount of heat transferred to the stop side heat exchanging part is further reduced. Become. Therefore, the thermal strain generated in the rectangular wall portion constituting the flat hollow body located at the end of the operation side heat exchange portion in the stop side heat exchange portion is further reduced, and as a result, the rectangular wall portion is prevented from being damaged. The effect of preventing is further improved.

As in the integrated heat exchange apparatus of 3) above, the flat hollow body of at least one heat exchange part is provided between two rectangular wall parts spaced apart from each other and the peripheral edges of both rectangular wall parts. It consists of a peripheral wall part straddling and a partition wall part that divides the inside into two flow paths extending in the length direction of the flat hollow body, and both flow paths are provided on both sides of the partition wall part at one end of both rectangular wall parts. Are formed at intervals in the width direction of the flat hollow body, and the end of the partition wall opposite to the through hole is cut away so that the two flow paths communicate with each other. When a U-shaped flow path is formed and two through holes are formed in the communication member so as to communicate with the two through holes of both rectangular wall portions, the end on the side of the adjacent heat exchange unit in this heat exchange unit The rectangular wall portion of the flat hollow body located in the section is prominently subjected to the above-described thermal distortion. They tend to be. However, even in this case, if configured as in the above 1) or 2) , it is possible to suppress the occurrence of this thermal distortion, resulting in less stress generated in the rectangular wall and breakage Is prevented.

Also in the case of the integrated heat exchange device of 4) , as described in 3) above, the end on the side of the adjacent heat exchange section in the heat exchange section having a flat hollow body having a U-shaped flow path The flat plate of the flat hollow body located at the position tends to generate the above-mentioned thermal strain significantly. However, even in this case, if it is configured as in the above 1) or 2) , it is possible to suppress the occurrence of this thermal strain, and as a result, the stress generated in this flat plate becomes smaller and breakage occurs. Is prevented.

According to the integrated heat exchange device of 5) above, a flat hollow body can be produced relatively easily.

In the integrated heat exchange device according to any one of the above 3) to 5) , an end portion on the side of another adjacent heat exchange portion in the heat exchange portion provided with a flat hollow body having a U-shaped flow path There is a tendency that the above-described thermal distortion is prominently generated in the rectangular wall portion at the end portion on the side where the two flow paths of the flat hollow body located at each other communicate with each other. However, even in this case, if configured as in the above 6) , it is possible to suppress the occurrence of this thermal distortion, and as a result, the stress generated in the rectangular wall is also reduced and damage is prevented. The

According to the integrated heat exchange device of 7) to 10) above, the flat hollow body located at the end of the adjacent heat exchange section in the heat exchange section provided with the flat hollow body having the U-shaped flow path The generation of the above-described thermal strain on the rectangular wall portion can be further suppressed. Therefore, the stress generated in the rectangular wall portion is also reduced, and damage is reliably prevented.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the upper and lower sides and the left and right sides in FIG. 1 are referred to as the upper and lower sides and the left and right sides, respectively, and the downstream side in the flow direction of the low-temperature fluid that exchanges heat with the high-temperature fluid that flows between the adjacent flat bodies The direction indicated by the arrow X in FIGS. 1 and 13 is the front, and the opposite side is the rear. 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.

  FIG. 1 shows the overall configuration of an integrated heat exchange apparatus according to the present invention, and FIGS.

  In this embodiment, the integrated heat exchange device according to the present invention is applied to an oil cooler for cooling high-temperature oil in a compressor and an after-cooler for cooling high-temperature compressed air. Here, examples of the compressor include a road compressor, a compressor used for a gas turbine, and a compressor used for a railway vehicle brake.

  In FIG. 1, the integrated heat exchanger (1) has an oil cooler (2) that cools high-temperature oil and an after-cooler (3) that cools high-temperature compressed air in the same vertical plane so that the former is below. The spacer (4) is disposed between the left and right end portions of the oil cooler (2) and the aftercooler (3).

  The oil cooler (2) includes a flat hollow body (5) for high-temperature oil circulation made of aluminum and arranged in parallel in the vertical direction and extending in the left-right direction, and a flat hollow body (5) adjacent to the top and bottom. An aluminum extruded profile connecting member (6) disposed between the left end portions and brazed to the flat hollow body (5) and passing between the adjacent flat hollow bodies (5), and a flat hollow body adjacent to the top and bottom ( The aluminum extruded bar (7) extending in the front-rear direction disposed between the right ends of 5) and brazed to the flat hollow body (5) is adjacent to the communicating member (6) and the bar (7). An aluminum corrugated fin (9) disposed in the ventilation gap (8) between the flat hollow bodies (5) and brazed to the flat hollow bodies (5) is provided.

  An aluminum extruded profile input / output member (11) having the same thickness and size as the communication member (6) is arranged below the left end of the flat hollow body (5) at the lower end of the oil cooler (2), thereby forming a flat hollow body. The same bar (7) as the bar (7) between the flat hollow bodies (5) is also brazed to (5) and brazed to the flat hollow body (5). The left end of the aluminum lower side plate (12) that is long in the left-right direction is brazed to the right end of the lower surface of the input / output member (11), and the right end is also brazed to the entire lower surface of the bar (7). A ventilation gap (8) is also formed between the side plate (12) and the flat hollow body (5) at the lower end, and a corrugated fin (9) is also arranged in the ventilation gap (8) so that the lower side plate (12 ) And the flat hollow body (5). The lower side plate (12) is made of an aluminum brazing sheet having a brazing filler metal layer on the upper surface.

  As shown in FIGS. 2 and 3, the flat hollow body (5) includes a flat upper and lower wall (13) (rectangular wall portion) that is long in the left-right direction and a peripheral wall (14) extending between the peripheral edges of the upper and lower walls (13). ) (Peripheral wall) and a partition wall (17) (partition wall) that divides the interior into two front and rear flow paths (15) and (16) extending in the left-right direction. The partition at the left end of the upper and lower walls (13) Two through-holes (18) and (19) are formed in the front and rear side portions of the wall (17) at intervals in the front-rear direction so as to allow the passages (15) and (16) to communicate with the outside. Further, the right end portion of the partition wall (17) is cut away so that the two flow paths (15) and (16) communicate with each other. The communication part is indicated by (21). Such a flat hollow body (5) is composed of two rectangular flat plates (22) (23) made of an aluminum brazing sheet having a brazing filler metal layer on both sides and long in the left-right direction and spaced apart in the vertical direction. And an extruded aluminum channel member (24) disposed between the upper and lower flat plates (22) and (23) and brazed to the flat plates (22) and (23).

  Through holes (18) and (19) are formed in both front and rear side portions of the left end portions of both flat plates (22) and (23). In addition, the right end portions of both flat plates (22) and (23) are respectively on the other flat plate (23) and (22) side, that is, on the lower flat plate (23), on the upper flat plate (22) and on the upper side. The bent portions (22a) and (23a) are overlapped with each other and brazed (see FIG. 4). The upper and lower walls (13) are formed by the flat plates (22) and (23), and the right short wall portion (14a) of the peripheral wall (14) is formed by the bent portions (22a) and (23a) of the flat plates (22) and (23). Is formed.

  The flow path forming body (24) includes two linear side bars (25) arranged between the front and rear side edges of the upper and lower flat plates (22) and (23) and extending in the left and right directions, and both side bars (25). One intermediate bar (26) which is arranged with a gap between them and extends in the left-right direction, and is provided integrally in the middle part of the height across both side bars (25) and intermediate bar (26) Two heat transfer area expansion sections (27) and left and right ends of both side bars (25) are integrally provided and extend inward in the front-rear direction, and the front ends are on both front and rear sides of the left end of the intermediate bar (26). And an end bar (28) brazed to be brought into contact. Both side bars (25), intermediate bar (26) and both end bars (28) are brazed to upper and lower flat plates (22) and (23). The left end portion of the intermediate bar (26) is brazed to a portion between the through holes (18) and (19) in the flat plates (22) and (23). The right end portion of the intermediate bar (26) is cut out over a predetermined length so as to form a communication portion (21). Further, the left end portion of both heat transfer area enlarged portions (27) has a predetermined length so that a through hole that matches the through holes (18) and (19) of both flat plates (22) and (23) is formed here. Has been excised. Then, both side bars (25) of the flow path forming body (24) form both front and rear long side wall portions (14b) of the peripheral wall (14), and both end bars (28) of the flow path forming body (24) The left short wall portion (14c) of 14) is formed.

  The heat transfer area expanding portion (27) is a corrugated band plate portion in which an upward protruding bent portion (29a) and a downward protruding bent portion (29b) are alternately provided in the left-right direction via a horizontal portion (29c) ( 29) are formed by being arranged in the front-rear direction and integrally connected to each other at the horizontal portion (29c). Further, in the heat transfer area enlarged portion (27), the upper protruding bent portion (29a) and the lower protruding bent portion (29b) of the corrugated strip portion (29) adjacent in the front-rear direction are formed so as to be shifted in the left-right direction. Has been. The horizontal portion (29c) between the upper protruding bent portion (29a) and the lower protruding bent portion (29b) adjacent to each other in the left-right direction in each corrugated strip (29) of the heat transfer area expanding portion (27). The wavy strips (29) adjacent in the front-rear direction are integrally connected to each other at the horizontal part (29c), but the horizontal part (29c) is not necessarily required. In this case, the portions of the adjacent corrugated strips (29) that switch from the upper protruding bent portion (29a) to the lower protruding bent portion (29b) intersect with each other, and are thus integrally connected to each other.

  The flow path forming body (24) is manufactured as shown in FIGS. That is, two linear side bars (25) provided in the front-rear direction and extending in the left-right direction, and an intermediate bar provided between the two side bars (25) and spaced in the left-right direction. (26) for a flow path forming body made of an extruded aluminum material comprising a flat plate-like part (31) integrally provided at an intermediate part of the height across both side bars (25) and the intermediate bar (26) The material (32) is manufactured (see FIG. 5 (a) and FIG. 6 (a)). Next, the left and right ends of the intermediate bar (26) are cut out over a predetermined length, and the left end portions of both flat plate portions (31) are cut out to be longer than the cut lengths of the left end portions of the intermediate bar (26). (See FIG. 5 (b) and FIG. 6 (b)). Next, the heat transfer area enlarged portion (27) is formed by pressing the flat plate portions (31) (see FIGS. 5 (c) and 6 (c)). Then, the left end of both side bars (25) is bent inward in the front-rear direction and the tip is brought into contact with both front and rear sides of the right end of the intermediate bar (26) (see FIG. 5 (d)). Both end bars (28) are formed by brazing (26). Note that brazing to the intermediate bar (26) at the tip of both end bars (28) is a molten brazing material that has melted from the flat plates (22) (23) during the manufacture of the integrated heat exchange device (1) described later. Is done.

  As shown in FIG. 2, each communicating member (6) has two vertical through-holes (33) (34) communicating with the two through-holes (18) and (19) of the upper and lower walls (13) of the flat hollow body (5). 34) is formed so as to coincide with the through holes (18) and (19) when viewed from above. The front side portion of the left end portion of all the flat hollow bodies (5) and the front side portion of all the communication members (6) form the inlet side header portion (30A) (see FIG. 12), and the inlet side header portion (30A ), The left end of the front flow path (15) of all the flat hollow bodies (5) and the front vertical through holes (33) of all the communication members (6) are front through holes (upper and lower walls (13) ( 18). Further, an outlet-side header portion (30B) is formed by the rear portion of the left end portion of all the flat hollow bodies (5) and the rear portion of all the communication members (6) (see FIG. 12), and the outlet-side header portion. (30B), the left end of the rear flow path (16) of all the flat hollow bodies (5) and the rear vertical through holes (34) of all the communication members (6) are connected to the upper and lower walls (13). It is made to communicate by the rear side through hole (19).

  As shown in FIG. 7, the input / output member (11) has two vertical through holes (35) communicating with the two through holes (18) and (19) of the lower wall (13) of the flat hollow body (5) at the lower end. (36) is formed. Female threads (35a) and (36a) are formed on the inner peripheral surfaces of these vertical through holes (35) and (36), respectively.

  The aftercooler (3) is a flat hollow body (37) for high-temperature compressed air circulation made of aluminum that is arranged in parallel in the vertical direction and extends in the left-right direction, and a flat hollow body (37) that is adjacent vertically. A communication member (38) made of an extruded aluminum material that is disposed between the left and right ends of the two and brazed to the flat hollow body (37) and passes between the adjacent flat hollow bodies (5), and left and right communication members (38 ) Between the flat hollow bodies (37) adjacent to each other, and an aluminum corrugated fin (41) brazed to the flat hollow bodies (37). The number of flat hollow bodies (37) is smaller than that of the flat hollow bodies (5) of the oil cooler (2).

  An inlet member (42) made of an extruded aluminum material having the same thickness and size as the communicating member (38) is connected to the upper side of the left end part, on the upper right side of the flat hollow body (37) at the upper end of the aftercooler (3). An aluminum extruded profile outlet member (43) having the same thickness and size as the member (38) is disposed and brazed to the flat hollow body (5). In addition, the right end of the aluminum upper side plate (44) long in the left-right direction is brazed to the upper left end of the upper surface of the inlet member (42), and the left end is also brazed to the upper right end of the outlet member (43). A ventilation gap (39) is also formed between the upper side plate (44) and the flat hollow body (37) at the upper end, and corrugated fins (41) are also arranged in the ventilation gap (39) to form the upper side plate ( 44) and a flat hollow body (37). The upper side plate (44) is made of an aluminum brazing sheet having a brazing filler metal layer on the lower surface.

  As shown in FIG. 8, the flat hollow body (37) of the aftercooler (3) straddles between the flat upper and lower walls (45) (rectangular wall portion) long in the left-right direction and the peripheral edges of the upper and lower walls (45). It consists of a peripheral wall (46) (peripheral wall part), and one flow path (47) is formed inside, and the left and right ends of the upper and lower walls (45) are connected to the flow path (47) in the front-rear direction. One long through hole (48) is formed. Such a flat hollow body (37) includes two rectangular flat plates (51) made of an aluminum brazing sheet having a brazing filler metal layer on both sides and long in the vertical direction, and both It consists of a flow path forming body (52) made of an extruded aluminum material that is disposed between the flat plates (51) and brazed to both flat plates (51). Through holes (48) that are long in the front-rear direction are formed in the left and right ends of both flat plates (51).

  The flow path forming body (52) has two linear side bars (53) disposed between the front and rear side edges of both flat plates (51) and extending in the left-right direction, and the height across the side bars (53). The heat transfer area expansion part (54) provided integrally in the middle part of the two and the left and right ends of both side bars (53) are provided integrally with each other and extend inward in the front-rear direction, and the tips are in contact with each other. It consists of a brazed end bar (55). Both side bars (53) and all end bars (55) are brazed to upper and lower flat plates (51). In addition, the left and right end portions of the heat transfer area expanding portion (54) are cut out over a predetermined length so that through holes matching the through holes (48) of both flat plates (51) are formed here. . Then, the upper and lower walls (45) are formed by both flat plates (51), and the front and rear long side wall portions (46a) of the peripheral wall (46) are formed by both side bars (53) of the flow path forming body (52). Left and right short side wall portions (46b) are formed by both end bars (55) at both left and right end portions of the path forming body (52). The heat transfer area enlarging portion (54) is composed of a plurality of cross-section substantially rhombic tubular portions (54a) that are integrally formed side by side in the left-right direction.

  The flow path forming body (52) is manufactured as shown in FIG. That is, two linear side bars (53) provided at intervals in the front-rear direction and extending in the left-right direction, and an intermediate part of the height across the side bars (53) and the side bar ( 53) A material (56) for an aluminum extruded shape channel forming body comprising a heat transfer area expanding portion (54) over the entire length of 53) is manufactured (see FIG. 9 (a)). Next, both end portions of the heat transfer area expansion portion (54) are cut out over a predetermined length (see FIG. 9B). Thereafter, both end portions of both side bars (53) are bent inward in the front-rear direction so that the ends are brought into contact with each other (see FIG. 9 (c)), and the end bars (55) are formed by brazing each other. Note that the ends of both end bars (55) are brazed to each other with a molten brazing material that has melted from the flat plate (51) during the production of the integrated heat exchange device (1) described later.

  The communication member (38) of the after cooler (3) has the same configuration as the communication member (6) of the oil cooler (2), and has two front and rear vertical through holes (57) and (58). The right end portion of all the flat hollow bodies (37) and all the right communication members (38) form the inlet side header portion (40A) (see FIG. 12), and all the flat hollow bodies (37) The left end portion and all the left side communication members (38) form an outlet side header portion (40B) (see FIG. 12). In the inlet side header portion (40A) and the outlet side header portion (40B), all flat hollow portions are formed. The flow path (47) of the body (37) and the front and rear vertical through holes (57) and (58) of all the communication members (38) are communicated with each other through the through holes (48) of the upper and lower walls (45).

  As shown in FIG. 10, the inlet member (42) is formed with a vertical through hole (59) communicating with the right through hole (48) of the upper wall (45) of the flat hollow body (37) at the upper end, The outlet member (43) is formed with a vertical through hole (61) communicating with the left through hole (48) of the upper wall (45) of the flat hollow body (37) at the upper end. Female threads (59a) (61a) are formed on the inner peripheral surfaces of these vertical through holes (59) (61), respectively.

  As shown in FIG. 11, the spacer (4) disposed between the left and right ends of the oil cooler (2) and the aftercooler (3) has a plurality of through holes (62) extending in the front-rear direction. These are formed side by side, whereby a heat transfer amount reducing portion is formed. These spacers (4) are brazed to a flat hollow body (5) at the upper end of the oil cooler (2) and a flat hollow body (37) at the lower end of the aftercooler (3). Between the spacers (4), the air gap (63) is also formed between the flat hollow body (5) at the upper end of the oil cooler (2) and the flat hollow body (37) at the lower end of the after cooler (3). Here, the same aluminum corrugated fins (41) as the aftercooler (3) are arranged and brazed to both flat hollow bodies (37).

  The integrated heat exchange device (1) includes an aluminum brazing sheet flat plate (22) (23) (51), a flow path forming body (24) (52), a communication member (6) (38), a bar ( 7), corrugated fins (9), (41), aluminum brazing sheet lower side plate (12) and upper side plate (44), and spacer (4) are overlaid in a predetermined order by appropriate means. It is manufactured by temporarily fixing and brazing these together. At this time, the end bar (28) and the intermediate bar (26) of the flow path forming body (24) and the end bar of the flow path forming body (52) are formed by the molten brazing material melted from the flat plates (22) and (23). (55) They are brazed together.

  In the integrated heat exchanger (1) described above, high-temperature oil enters the inlet-side header portion (30A) from the front vertical through hole (35) of the input / output member (11) as indicated by an arrow Y in FIG. Inflow, then branched into all flat hollow bodies (5) and flowed to the right in the front flow path (15), and further into the rear flow path (16) through the communication portion (21), It flows leftward in the rear channel (16), flows into the outlet header (30B), and flows out from the rear vertical through hole (36) of the input / output member (11). Then, while flowing through the front flow path (15) and the rear flow path (16) of all the flat hollow bodies (5), the low temperature that flows forward (see arrow X) through the ventilation gaps (8) and (63) It is cooled by exchanging heat with the cooling air.

  On the other hand, the hot compressed air flows into the inlet side header portion (40A) from the vertical through hole (59) of the inlet member (42) as shown by an arrow Z in FIG. 37), flows leftward in the flow path (47), flows into the outlet header (40B), and flows out from the vertical through hole (61) of the outlet member (43). And while flowing through all the flat hollow bodies (37), it is cooled by exchanging heat with the low-temperature cooling air flowing forward (see arrow X) through the ventilation gaps (39, 63).

  Here, if only one of the high temperature oil of the oil cooler (2) and the high temperature compressed air of the after cooler (3), for example, the flow of the high temperature oil stops, the oil cooler (2) and the after cooler ( The temperature difference from 3) increases, and heat is transferred from the aftercooler (3) to the oil cooler (2). However, the amount of heat transfer from the after cooler (3) to the oil cooler (2) is reduced by the action of the heat transfer amount reducing portion including the plurality of through holes (62) in the spacer (4). Moreover, since the cooling air flows in the through holes (62) of the spacer (4), the heat transferred from the after cooler (3) to the spacer (4) is taken away by this cooling air, and this also causes the after cooler (3). Heat transfer from the oil cooler to the oil cooler (2). Therefore, the thermal strain generated in the two flat plates (22) and (23) constituting the flat hollow body (5) at the upper end of the oil cooler (2) is reduced, and as a result, generated in these flat plates (22) and (23). The stress to be reduced is also reduced and damage is prevented.

  FIG. 13 shows another embodiment of the integrated heat exchange device according to the present invention.

  In the case of the integrated heat exchanger (70) shown in FIG. 13, the right end portion between the flat hollow body (5) at the upper end of the oil cooler (2) and the second flat hollow body (5) from the top is also provided. Spacers (4) are arranged and brazed to both flat hollow bodies (5). Other configurations are the same as those of the integrated heat exchange device of the first embodiment described above. A spacer (4) is also arranged at the left end between the flat hollow body (5) at the upper end of the oil cooler (2) and the second flat hollow body (5) from the top, so that both flat hollow bodies ( It may be brazed to 5).

  In this integrated heat exchanger (70), the flow of either one of the high-temperature oil in the oil cooler (2) and the high-temperature compressed air in the after-cooler (3), for example, when only the flow of the high-temperature oil stops is described above. The amount of heat transfer from the aftercooler (3) to the oil cooler (2) is further reduced as compared with the case of the first embodiment. Therefore, the thermal strain generated in the two flat plates (22) and (23) constituting the flat hollow body (5) at the upper end of the oil cooler (2) is further reduced. As a result, these flat plates (22) and (23) The generated stress is further reduced and damage is reliably prevented.

  In the two embodiments described above, the spacer (4) at the left end is not necessarily required, and instead of the spacer (4), an aluminum block having no holes may be disposed.

  In the above two embodiments, as shown in FIG. 14, a plurality of convex portions (75) extending in the front-rear direction may be formed on the inner peripheral surface of the through hole (62) of the spacer (4). . In this case, the heat transfer area from the spacer (4) to the cooling air increases, and the heat transferred from the after cooler (3) to the spacer (4) when the flow of high-temperature oil in the oil cooler (2) stops, The effect of taking away by the cooling air flowing through the through hole (62) is further improved. Instead of the convex portion (75) or in addition to the convex portion (75), a plurality of concave portions extending in the front-rear direction may be formed on the inner peripheral surface of the through hole (62).

  In all the above embodiments, the integrated heat exchange device according to the present invention is used for a load compressor, and an oil cooler and an aftercooler are integrated, but the present invention is not limited to this. Two or three of the aftercoolers, oil coolers, and radiators in road compressors, gas turbine compressors, railway vehicle compressors, etc. may be integrated, and aftercoolers, oil coolers, radiators, etc. Sometimes applied as a single unit.

  Furthermore, the integrated heat exchange device according to the present invention is used as an oil cooler for cooling oil used in hydraulic equipment such as a crane alone, a deck crane, a crane truck, and a shovel car, or a machine tool.

  Next, specific examples of the present invention will be described.

Example 1
The number of flat hollow bodies (5) in the oil cooler (2) is 7, the number of flat hollow bodies (37) in the after cooler (3) is 3, and the communication member (6) and bar (3) in the oil cooler (2) The core width, which is the distance to 7), is 550 mm, the core width, which is the distance between the two communication members 38 in the aftercooler (3), is 500 mm, and the width in the front-rear direction is 100 mm. A body heat exchanger (1) was prepared. However, the right end of the corrugated fin (9) arranged in the ventilation gap (8) between the flat hollow body (5) at the upper end of the oil cooler (2) and the second flat hollow body (5) from above is It was excised over a predetermined length. Then, as shown in FIG. 15, stress measuring devices are respectively provided at the right end portion of the lower surface of the flat hollow body (5) at the upper end of the oil cooler (2), that is, the front and rear end portions of the portion where the corrugated fin (9) is cut off. (80) and the temperature measuring device (81) were attached so that the former was inside in the front-rear direction. The distance from the front and rear side edges of the flat hollow body (5) of the front and rear stress measuring device (80) is 10 mm.

Next, oil at a temperature of 110 ° C. is supplied from the front vertical through hole (35) of the inlet / outlet member (11) of the oil cooler (2) at a flow rate of 50 l / min, and oil at a temperature of 110 ° C. is supplied at a flow rate of 4 Supplied from the vertical through hole (59) of the inlet member (42) of the aftercooler (3) so as to be 8 l / min, and cooling air at a temperature of 30 ° C. is supplied from the rear so that the flow rate is 38 m ³ / min. I shed it forward. The temperature of the oil flowing out from the rear vertical through hole (36) of the inlet / outlet member (11) of the oil cooler (2) is 95 ° C., and the vertical through hole (61 of the outlet member (43) of the after cooler (3) The temperature of the oil that spilled out from the tank was 75 degrees.

  Table 1 shows the ON state in which oil flows to the oil cooler (2) and the OFF state in which oil does not flow, and the ON state in which oil flows to the aftercooler (3) and the OFF state in which no oil flows. While switching, the stress change and temperature change of the lower wall (13) of the flat hollow body (5) were measured by the stress measurement device (80) and the temperature measurement device (81). The switching between the ON state and the OFF state was performed when the stress and temperature were in a steady state. The result is shown in FIG.

Table 2 shows the ON state and the OFF state when the maximum stress is generated in the lower wall (13) of the flat hollow body (5).

Example 2
As shown in FIG. 17, a spacer (4) is disposed between the right ends of the flat hollow body (5) at the upper end of the oil cooler (2) and the second flat hollow body (5) from above. Corrugation arranged in the ventilation gap (8) between the flat hollow body (5) second from the top and the third flat hollow body (5) from the top. The right end of the fin (9) is cut out over a predetermined length, and a stress measuring device (80) and a temperature measuring device (81 are respectively attached to the front and rear ends of the right end on the lower surface of the second flat hollow body (5) from above. ), And the stress change and temperature of the lower wall (13) of the flat hollow body (5) by the stress measurement device (80) and the temperature measurement device (81) in the same manner as in Example 1 above. Changes were measured. The result is shown in FIG.

  Table 2 shows the ON state and the OFF state when the maximum stress is generated in the lower wall (13) of the flat hollow body (5).

Comparative Example As shown in FIG. 19, the stress measuring device was the same as Example 1 except that an aluminum block (85) having no through hole was used instead of the spacer (4). (80) and a temperature measuring device (81) were used to measure the stress change and temperature change of the lower wall (13) of the flat hollow body (5). The result is shown in FIG.

  Table 2 shows the ON state and the OFF state when the maximum stress is generated in the lower wall (13) of the flat hollow body (5).

In FIGS. 16, 18 and 20, the stress on the + side is the tensile direction, and the stress on the − side is the compression direction. Further, in the column of maximum stress in Table 2, a circle indicates that the generated maximum stress is smaller than the fatigue strength at 10 ⁷ repetitions of the flat plate (23) forming the lower wall (13). It indicates that the maximum stress generated is greater than the fatigue strength at repeated several 10 ⁷ times of the plate (23) forming a lower wall (13).

From Examples 1 and 2 and the comparative example, in Examples 1 and 2, the generated maximum stress is smaller than the fatigue strength at 10 ⁷ repetitions of the flat plate (23) forming the lower wall (13). contrast, in the comparative example, the maximum stress was found to be greater than the fatigue strength at repeated several 10 ⁷ times of the plate (23) forming a lower wall (13).

It is a perspective view which shows the whole structure of the integrated heat exchange apparatus by this invention. It is a disassembled perspective view which shows a part of oil cooler. It is a partially-cutaway perspective view which abbreviate | omitted the heat-transfer area expansion part which shows the flat hollow body of an oil cooler. It is a vertical sectional view which expands and shows the right end part of the flat hollow body of an oil cooler. It is a fragmentary perspective view of the left end part which shows the manufacturing method of the flow-path formation body of the flat hollow body of an oil cooler. It is a fragmentary perspective view of the right end part which shows the manufacturing method of the flow-path formation body of the flat hollow body of an oil cooler. It is a disassembled perspective view which shows the lower end part of an oil cooler. It is a disassembled perspective view which shows a part of aftercooler. It is a fragmentary perspective view of the left end part which shows the manufacturing method of the flow-path formation body of the flat hollow body of an aftercooler. It is a disassembled perspective view which shows the upper end part of an aftercooler. It is a disassembled perspective view which shows the boundary part of an oil cooler and an aftercooler. It is a figure showing how oil and compressed air flow in an integrated heat exchange device. It is a perspective view which shows the whole structure of other embodiment of the integrated heat exchange apparatus by this invention. It is a perspective view which shows the modification of a spacer. The state which attached the stress measuring apparatus and the temperature measuring apparatus to the integrated heat exchange apparatus used for Example 1 is shown, (a) is a partial front view, (b) is a horizontal sectional view seen from below. 4 is a graph showing stress changes and temperature changes in Example 1. It is a partial front view which shows the state which attached the stress measuring device and the temperature measuring apparatus to the integrated heat exchange apparatus used for Example 2. FIG. It is a graph which shows the stress change and temperature change of Example 2. FIG. It is a partial front view which shows the state which attached the stress measuring device and the temperature measuring apparatus to the integrated heat exchange apparatus used for the comparative example. It is a graph which shows the stress change and temperature change of a comparative example.

(1): Integrated heat exchanger
(2): Oil cooler (heat exchanger)
(3): After cooler (heat exchanger)
(4): Spacer
(5): Flat hollow body
(6): Communication member
(13): Upper and lower walls (rectangular walls)
(14): Peripheral wall (peripheral wall)
(14a): Right end wall
(14b): Front and rear long side walls
(14c): Left short side wall
(15) (16): Channel
(17): Partition wall (partition wall)
(18) (19): Through hole
(21): Communication part
(22) (23): Flat plate
(22a) (23a): Bending part
(24): Channel formation body
(25): Sidebar
(26): Intermediate bar
(27): Heat transfer area expansion section
(28): End bar
(33) (34): Vertical through hole
(37): Flat hollow body
(38): Communication member
(45): Upper and lower walls (rectangular wall)
(46): Perimeter wall (peripheral wall)
(47): Flow path
(62): Through hole
(75): Convex part

Claims (14)

A plurality of flat hollow bodies that are provided in parallel and spaced apart from each other, and a flow path between adjacent flat hollow bodies that are disposed between at least one end of adjacent flat hollow bodies. A plurality of heat exchanging portions provided with a communicating member that is passed through are arranged in the thickness direction of the flat hollow body, and the flat hollow body includes two rectangular wall portions facing each other, and two rectangular wall portions has a peripheral wall portion that spans between the peripheral portion, the spacer is arranged between the flat hollow body adjacent the two heat exchange portion adjacent heat transfer amount reduction unit consisting of the through hole in the spacer is formed, the heat Integrated heat exchange in which low-temperature fluid flows in the width direction of the flat hollow body between the adjacent flat hollow bodies of the exchange section, and the through-hole serving as the heat transfer amount reducing portion of the spacer extends in the width direction of the flat hollow body apparatus. The integrated heat exchange device according to claim 1 , wherein a plurality of convex portions and / or concave portions extending in a length direction of the through hole are formed on an inner peripheral surface of the through hole serving as a heat transfer amount reducing portion of the spacer . The flat hollow body of at least one heat exchange part has two rectangular wall parts provided at intervals, a peripheral wall part straddling between the peripheral edges of both rectangular wall parts, and the length of the flat hollow body inside It is composed of a partition wall section that is divided into two flow paths extending in the direction, and two through-holes that respectively lead both flow paths to the outside are formed into flat hollow bodies on both side portions of the partition wall section at one end of both rectangular wall sections. The end of the partition wall on the side opposite to the through hole is cut off to connect the two flow paths to each other to form a U-shaped flow path. The integrated heat exchange device according to claim 1 or 2, wherein two through-holes communicating with the two through-holes in both rectangular wall portions are formed . A flat hollow body having a U-shaped channel is formed between a rectangular flat plate spaced from each other, two linear side bars arranged between both long side edges of both flat plates, and the side bars. One intermediate bar spaced apart from these, two sidebars, two heat transfer area enlarged portions integrally provided at the height intermediate portion across the intermediate bars, and one end of each sidebar And an end bar which is brazed by being in contact with both side surfaces of one end portion of the intermediate bar, and the other end portion of the intermediate bar is cut off. The end portions on the end bar side in the thermal area expansion portion are respectively cut off, and through holes are formed in both side portions of the intermediate bar at the end bar side ends in both flat plates, and both rectangular wall portions are formed by both flat plates. End bars on both plates Is bent to the other flat plate side, and the bent portions are overlapped with each other and brazed to form one short side wall portion on the peripheral wall portion. The integrated heat exchange device according to claim 3, wherein two long side wall portions of the peripheral wall portion are formed by the bar, and the other short side wall portion of the peripheral wall portion is formed by the end bar of the flow path forming body . 5. The integrated heat exchange device according to claim 4, wherein both flat plates are each made of an aluminum brazing sheet, and the flow path forming body is made of an aluminum extruded profile . Two flow paths in a flat hollow body having a U-shaped flow path, in which a spacer disposed between the heat exchange section having a flat hollow body having a U-shaped flow path and a heat exchange section adjacent thereto is provided. The integrated heat exchange device according to any one of claims 3 to 5, wherein the heat exchanger is disposed at an end portion on a side where they are in communication with each other . In the heat exchanging part provided with the flat hollow body having the U-shaped flow path, the two flow paths in the plurality of flat hollow bodies located on the other heat exchanging part side adjacent to the heat exchanging part communicate with each other. The integrated heat exchanger according to claim 6 , wherein a second spacer is disposed between the adjacent end portions, and a heat transfer amount reducing portion is formed in the second spacer . The integrated heat exchange device according to claim 7, wherein the heat transfer amount reducing portion of the second spacer comprises a through hole formed in the second spacer . The integrated heat exchange device according to claim 8 , wherein a through hole serving as a heat transfer amount reducing portion of the second spacer extends in the width direction of the flat hollow body . The integrated heat exchange device according to claim 9 , wherein a plurality of convex portions and / or concave portions extending in a length direction of the through hole are formed on an inner peripheral surface of the through hole serving as a heat transfer amount reducing portion of the second spacer . One of the two adjacent heat exchanging portions is one of an oil cooler, an aftercooler, and a radiator, and the other is any one of the oil cooler, the aftercooler, and the radiator. The integrated heat exchange device according to any one of claims 1 to 10 . The compressor provided with the integrated heat exchange apparatus in any one of Claims 1-11 . A machine tool comprising the integrated heat exchange device according to any one of claims 1 to 11 . The hydraulic equipment provided with the integrated heat exchange apparatus in any one of Claims 1-11 .

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