JP2007214157A - Water-cooled cooling structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce costs, and to improve a cooling effect by reducing the number of components in a cooling fin and reducing the number of working hours. <P>SOLUTION: A cooling fin 7 having a plurality of fins 7a is arranged integrally from the side of an inflow port 6c in cooling water in a water tank 6 to the side of an outflow port 6d. Partition walls 6e, 6f for dividing a channel in the water tank 6 into a plurality of regions 6g-6i are inserted between the fins 7a, 7a while the length of the partition walls 6e, 6f is reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a water-cooled cooling structure such as an inverter device.

  Conventionally, an inverter device has a water cooling structure for cooling a semiconductor element such as an IGBT or a printed board. 5A to 5C show a plan view, a longitudinal front view, and a longitudinal side view of an inverter device having a conventional water-cooled cooling structure (heat sink), and in FIG. 5A, an electronic component that is a heating element. Is omitted in the figure. In the figure, 1 is a pan-type water tank formed of an aluminum casting or the like and having a cooling water passage inside, and has a flat bottom 1a and a flange 1b at the opening edge. The bottom 1a is provided with an inlet 1c and an outlet 1d for cooling water, and a pipe 2 is attached to the inlet 1c and the outlet 1d. Further, two partition walls 1e and 1f are integrally formed on the inner surface of the peripheral wall of the water tank 1, the two partition walls 1e and 1f extend in opposite directions, and three regions are formed in the water tank 1 through gaps 1g and 1h. It is partitioned into 1i to 1k. Reference numeral 3 denotes a plate made of an aluminum plate or the like, which is attached to the flange portion 1 b of the water tank 1 and closes the opening side of the water tank 1. An electronic component 4 which is a heating element constituting an inverter circuit such as an IGBT is mounted on the plate 3, and the inner surface side of the plate 3 corresponds to the three regions 1i to 1k partitioned by the partition walls 1e and 1f. Cooling fins (corrugated fins) 5a to 5c formed by bending a thin metal strip into a corrugated shape are brazed.

  In the above configuration, the water tank 1 is partitioned into three regions 1i to 1k by two partition walls 1e and 1f, and the cooling water flowing into the water tank 1 through the pipe 2 and the cooling water inlet 1c is the first region 1i. As indicated by the arrows, the air flows along the direction of the ridgeline of the cooling fin 5a, flows into the second region 1j through the gap 1g, flows in the opposite direction along the cooling fin 5b, and further passes through the gap 1h. It flows into the third region 1k, flows again in the opposite direction along the cooling fin 5c, and flows out through the pipe 2 from the outlet 1d. Heat generated from the electronic component 4 is transmitted to the cooling fins 5a to 5c through the plate 3, and this heat is cooled by heat exchange with the cooling water.

Prior art document information includes the following.
JP 2002-170915 A

  As described above, in the inverter device having the conventional water-cooling type cooling structure, the water tank 1 in which the cooling water flows is divided into the plurality of regions 1i to 1k by the partition walls 1e and 1f. 5a to 5c are also divided. The number of divisions of the regions 1i to 1k varies depending on the amount of cooling water, the amount of heat generated by the electronic component 4, and the like, and accordingly, the number of divisions of the cooling fins 5a to 5c also varies. Therefore, when the number of the regions 1i to 1k is increased, the number of the cooling fins 5a to 5c is also increased, and both the number of parts and the man-hours are increased, and the cost is increased.

  The present invention has been made to solve the above-described problems, and can reduce the number of parts and man-hours of the cooling fin, reduce the cost, and improve the cooling effect. The purpose is to obtain a structure.

  The water-cooled cooling structure according to claim 1 of the present invention includes a water tank in which a cooling water inflow and an outlet are formed, a plate that closes an opening side of the water tank, The cooling water is disposed from the inlet side to the outlet side of the cooling water in the water tank, and is integrally inserted between the fins of the cooling fin and the fins having a plurality of fins. It is provided with a short partition wall which is divided into regions and makes the flow of cooling water in the opposite direction, and a heating element attached on the plate.

  The water-cooled cooling structure according to claim 2 includes a water tank in which a cooling water inlet and outlet are formed, a plate that closes the opening side of the water tank, and a water tank. A cooling fin having a plurality of fins, which is arranged from the inlet side to the outlet side of the cooling water, and inserted between the fins of the cooling fins and attached to the water tank. A partition wall made of a thin plate that divides the flow into a plurality of regions to reverse the flow of cooling water, and a curved portion that is formed on the inner surface of the peripheral wall of the partition wall mounting portion of the water tank, and that guides the cooling water to the partition wall, And a heating element mounted on the plate.

  The water-cooling type cooling structure according to claim 3 is one in which the partition wall and the curved portion are integrally formed.

  In the water-cooled cooling structure according to claim 4, the cooling fin is a corrugated fin or an extruded fin.

  As described above, according to the first aspect of the present invention, since the length of the partition wall is shortened, the partition wall can be inserted between the fins of the integrally formed cooling fin, and the partition wall can Even if the flow path is divided into a plurality of regions, it is not necessary to divide the cooling fins, the number of parts and man-hours can be reduced, and the cost can be reduced. In addition, since the cooling fins can be arranged also on the partition wall portion that has not been arranged conventionally, the cooling effect is improved.

  According to the second aspect, since the partition wall is formed of a thin plate, the partition wall can be inserted between the fins of the cooling fins having an integral structure, and the partition wall allows a plurality of flow paths in the water tank to be formed. Even if it divides into areas, it is not necessary to divide the cooling fins, the number of parts and the number of man-hours can be reduced, and the cost can be reduced. In addition, the cooling fins can be disposed also on the partition wall portion that has not been disposed conventionally, and the partition wall is formed of a thin plate, so that the fin pitch can be reduced and the cooling effect is improved. Furthermore, since the curved surface portion is provided on the inner surface of the peripheral wall of the partition wall mounting portion of the water tank, the flow path loss of the cooling water is reduced, the cooling water is easy to flow, and the cooling effect is improved.

According to the third aspect, since the partition wall is integrated, the number of parts and man-hours can be reduced, and the cost can be reduced. Moreover, the cooling effect can be improved by disposing the cooling fins in the partition wall portion and making the fin pitch fine. Furthermore, since the curved surface portion is provided on the inner surface of the peripheral wall of the partition wall installation portion of the water tank, the cooling water can easily flow and the cooling effect is improved. In addition, since the curved part on the inner surface of the peripheral wall of the aquarium and the partition wall are integrally formed, it is easy to manufacture, and since this integral one is separate from the aquarium, its quantity and position can be freely set. It can be selected and can flexibly cope with the design considering the cooling water flow rate, pressure loss, thermal resistance and the like.

According to the fourth aspect, since the cooling fins are corrugated fins or extruded fins, the same effects as those of the respective claims can be obtained, and the fin shape can be easily changed.

Best Embodiment 1
The best mode for carrying out the present invention will be described below with reference to the drawings. 1 (a) to 1 (c) show a plan view, a longitudinal front view, and a longitudinal side view of an inverter device having a water-cooled cooling structure according to Embodiment 1 of the present invention. In FIG. 4 is omitted. Reference numeral 6 denotes a pan-shaped water tank formed of an aluminum casting or the like and having an inside serving as a cooling water flow path, and has a flat bottom portion 6a and a flange portion 6b at an opening edge. The bottom 6a is provided with an inlet 6c and an outlet 6d for the cooling water, and the pipe 2 is attached to the inlet 6c and the outlet 6d. A plate 3 made of an aluminum plate or the like is attached to the flange portion 6 b of the water tank 6 and closes the opening side of the water tank 6. Also, in the water tank 6, an integral cooling fin (corrugated fin) 7 formed by bending a thin metal strip into a wave shape is disposed from the inlet 6 c side to the outlet 6 d side, and the cooling fin 7 includes a plurality of fins. 7 a is formed and brazed to the inner surface side of the plate 3.

  In addition, on the inner surface side of the peripheral wall of the water tank 6, partition walls 6e and 6f having short steps protrude in the opposite direction, and the partition walls 6e and 6f are formed between the fins 7a and 7a of the cooling fins 7. Inserted, the flow path in the water tank 6 is divided into a plurality of regions 6g to 6i. On the plate 3, an electronic component 4 that is a heating element constituting an inverter circuit such as an IGBT is attached.

  In the above configuration, the flow path in the water tank 6 is divided into three regions 6g to 6i by the two partition walls 6e and 6f, and the cooling water flowing into the water tank 1 through the pipe 2 and the cooling water inlet 6c is the first. As shown by the arrow, the region 6g flows in the direction of the fin 7a of the cooling fin 7, flows into the second region 6h, flows in the reverse direction along the fin 7a, and further flows into the third region 6i. Then, it further flows in the reverse direction along the fin 7a and flows out through the outlet 6d and the pipe 2. The heat generated from the electronic component 4 is transmitted to the cooling fins 7 through the plate 3, and this heat is cooled by heat exchange with the cooling water.

  In the first embodiment, since the length of the partition walls 6e and 6f is shortened, the partition walls 6e and 6f can be easily inserted between the fins 7a and 7a. Even if it divides | segments into a several area | region, it is not necessary to divide the cooling fin 7, and the number of parts and a man-hour can be reduced, and a cost reduction is attained. On the contrary, if the partition walls 6e and 6f become long, it becomes difficult to insert the partition walls 6e and 6f between the fins 7a of the cooling fins 7, and the positional accuracy of the partition walls 6e and 6f and the positional accuracy of the cooling fins 7 are required. . Conventionally, the cooling fins 7 are not provided between the flow path regions in the water tank 6. However, in the first embodiment, the cooling fins 7 are provided at the portions between the flow path regions as well as the other portions. Therefore, the cooling efficiency is improved.

Embodiment 2
2 (a) to 2 (c) show a plan view, a longitudinal front view, and a longitudinal side view of an inverter device having a water-cooling type cooling structure according to Embodiment 2 of the present invention. In FIG. 4 is omitted. 8 is a pan-shaped water tank formed of an aluminum casting or the like and having a cooling water passage inside, and has a flat bottom portion 8a and a flange portion 8b at the opening edge. The bottom 8a is provided with an inlet 8c and an outlet 8d for cooling water, and the pipe 2 is attached to the inlet 8c and the outlet 8d. A plate 3 made of an aluminum plate or the like is attached to the flange portion 6 b of the water tank 6 and closes the opening side of the water tank 8. Also, in the water tank 8, an integral cooling fin (corrugated fin) 7 formed by bending a thin metal strip into a wave shape is disposed from the inlet 8c side to the outlet 8d side, and the cooling fin 7 includes a plurality of fins. 7 a is formed and brazed to the inner surface side of the plate 3.

  Further, the inner wall side of the peripheral wall of the water tank 8 is made of a thin plate such as an aluminum plate, and short partition walls 9a and 9b protrude in the opposite direction and are attached by screws 10a and 10b. The partition walls 9a and 9b are cooling fins. 7 between the fins 7a and 7a, and the flow path in the water tank 8 is divided into a plurality of regions 8e to 8g. On the plate 3, an electronic component 4 that is a heating element constituting an inverter circuit such as an IGBT is attached. Further, curved portions 8h and 8i for guiding cooling water to the partition walls 9a and 9b are provided on the inner surface of the peripheral wall of the water tank 8 where the partition walls 9a and 9b are attached.

  In the above configuration, the flow path in the water tank 8 is divided into three regions 8e to 8g by the two partition walls 9a and 9b, and the cooling water flowing into the water tank 8 through the pipe 2 and the cooling water inlet 8c is the first. As shown by the arrow, the region 8e flows along the direction of the fin 7a of the cooling fin 7, flows into the second region 8f, flows in the reverse direction along the fin 7a, and further flows into the third region 8g. Then, it flows in the reverse direction along the fin 7a and flows out through the outlet 8d and the pipe 2. The heat generated from the electronic component 4 is transmitted to the cooling fins 7 through the plate 3, and this heat is cooled by heat exchange with the cooling water. The curved surface portions 8h and 8i smoothly guide the cooling water to the partition walls 9a and 9b.

  In Embodiment 2, since the partition walls 9a and 9b are formed of a thin plate having a short length, the partition walls 9a and 9b can be inserted between the fins 7a and 7a of the cooling fin 7 having an integrated structure, Even if the flow path in the water tank 8 is divided into the plurality of regions 8e to 8g by the partition walls 9a and 9b, the cooling fin 7 does not need to be divided, the number of parts and man-hours can be reduced, and the cost can be reduced. Become. In addition, cooling fins can be disposed on the partition walls 9a and 9b, which have not been conventionally disposed, and the partition walls 9a and 9b are formed of thin plates, so that the fin pitch can be reduced and cooling is performed. The effect is improved. Furthermore, since the curved surface portions 8h and 8i are provided on the inner surface of the peripheral wall of the partition wall 9a and 9b attachment portion of the water tank 8, the flow path loss of the cooling water is reduced, the cooling water is easy to flow, and the cooling effect is improved. To do.

Embodiment 3
3 (a) to 3 (c) show a plan view, a longitudinal front view, and a longitudinal side view of an inverter device having a water-cooled cooling structure according to Embodiment 3 of the present invention. In FIG. 4 is omitted. 11 is a pan-shaped water tank formed of an aluminum casting or the like and having a cooling water passage inside, and has a flat bottom portion 11a and a flange portion 11b at the opening edge. The bottom 11a is provided with an inlet 11c and an outlet 11d for cooling water, and the pipe 2 is attached to the inlet 11c and the outlet 11d. A plate 3 made of an aluminum plate or the like is attached to the flange portion 11 b of the water tank 11 to close the opening side of the water tank 11. Also, an integrated cooling fin (corrugated fin) 7 formed by bending a thin metal strip into a corrugated shape in the water tank 11 is disposed from the inlet 11c side to the outlet 11d side, and the cooling fin 7 includes a plurality of fins. 7 a is formed and brazed to the inner surface side of the plate 3.

  Moreover, the inner wall side of the peripheral wall of the water tank 11 is made of a thin plate such as an aluminum plate, and short partition walls 12a and 12b protrude in the reverse direction and are attached by screws 13a and 13b. The partition walls 12a and 12b are cooling fins. 7 is inserted between the fin 7a and the fin 7a, and the flow path in the water tank 11 is divided into a plurality of regions 11e to 11g. On the plate 3, an electronic component 4 that is a heating element constituting an inverter circuit such as an IGBT is attached. In addition, curved surface portions 14a and 14b for guiding cooling water to the partition walls 12a and 12b are provided on the inner surface of the peripheral wall of the portion of the water tank 11 where the partition walls 12a and 12b are attached. It is formed integrally with 12a and 12b.

  In the above configuration, the flow path in the water tank 11 is divided into three regions 11e to 11g by the two partition walls 12a and 12b, and the cooling water flowing into the water tank 11 through the pipe 2 and the cooling water inlet 11c is the first. As indicated by the arrow, the region 11e flows in the direction of the fin 7a of the cooling fin 7, flows into the second region 11f, flows in the reverse direction along the fin 7a, and further flows into the third region 11g. Then, it flows in the reverse direction along the fin 7a and flows out through the outlet 11d and the pipe 2. The heat generated from the electronic component 4 is transmitted to the cooling fins 7 through the plate 3, and this heat is cooled by heat exchange with the cooling water. The curved portions 14a and 14b guide the cooling water smoothly to the partition walls 12a and 12b.

  In Embodiment 3, since the partition walls 12a and 12b are formed of a thin plate having a short length, the partition walls 12a and 12b can be inserted between the fins 7a and 7a of the cooling fin 7 having an integrated structure, Even if the flow path in the water tank 11 is divided into a plurality of regions 11e to 11g by the partition walls 12a and 12b, the cooling fins 7 do not need to be divided, the number of parts and man-hours can be reduced, and the cost can be reduced. Become. In addition, the cooling fins 7 can be disposed also on the partition walls 12a and 12b that have not been disposed conventionally, and the partition walls 12a and 12b are formed of thin plates, so that the fin pitch can be made fine, The cooling effect is improved. Furthermore, since the curved surface portions 14a and 14b are provided on the inner surface of the peripheral wall of the partition wall 12a and 12b attachment portion of the water tank 11, the flow path loss of the cooling water is reduced, the cooling water is easy to flow, and the cooling effect is improved. To do. Further, since the curved surface portions 14a and 14b are formed integrally with the partition walls 12a and 12b, the manufacturing is facilitated, and this integrated body is separate from the water tank 11, so that the quantity and position thereof can be freely set. It can be selected and can flexibly cope with the design considering the cooling water flow rate, pressure loss, thermal resistance and the like.

Embodiment 4
4 (a) to 4 (c) show a plan view, a longitudinal front view, and a longitudinal side view of an inverter device having a water-cooled cooling structure according to Embodiment 4 of the present invention. In FIG. 4 is omitted. An integrated cooling fin (extrusion fin) 15 formed by extrusion is disposed in the water tank 11 from the inlet 11c side to the outlet 11d side, and the cooling fin 15 is formed with a plurality of fins 15a. Brazed to the side. The partition walls 12a and 12b are inserted between the fins 15a and 15a of the cooling fin 15 and divide the flow path in the water tank 11 into a plurality of regions 11e to 11g. Thus, since the fin shape of the cooling fin can be changed, the fin shape can be easily changed. Other configurations, operations, and effects are the same as those in the third embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view, a longitudinal front view, and a longitudinal side view of an inverter device having a water cooling type cooling structure according to Embodiment 1 of the present invention. It is the top view of the inverter apparatus which has the water cooling type cooling structure by Embodiment 2 of this invention, a vertical front view, and a vertical side view. It is the top view of the inverter apparatus which has the water cooling type cooling structure by Embodiment 3 of this invention, a vertical front view, and a vertical side view. It is the top view of the inverter apparatus which has the water cooling type cooling structure by Embodiment 4 of this invention, a vertical front view, and a vertical side view. It is a top view, a longitudinal front view, and a longitudinal side view of an inverter device having a conventional water-cooled cooling structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 ... Plate 4 ... Electronic component 6, 8, 11 ... Water tank 6c, 8c, 11c ... Inlet 6d, 8d, 11d ... Outlet 6e, 6f, 9a, 9b, 12a, 12b ... Partition walls 6g-6i, 8e- 8g, 11e-11g ... area 7 ... cooling fin (corrugated fin)
7a, 15a ... Fins 8h, 8i, 14a, 14b ... Curved portion 15 ... Cooling fin (extruded fin)

Claims (4)

  The inside is a cooling water flow path, a water tank in which an inlet and an outlet of the cooling water are formed, a plate that closes the opening side of the water tank, and from the cooling water inlet side to the outlet side in the water tank An integrated cooling fin having a plurality of fins, and inserted between the fins of the cooling fins, the flow path in the water tank is divided into a plurality of regions to reverse the flow of the cooling water. A water-cooled cooling structure comprising a short partition wall and a heating element mounted on a plate.   The inside is a cooling water flow path, a water tank in which an inlet and an outlet of the cooling water are formed, a plate that closes the opening side of the water tank, and from the cooling water inlet side to the outlet side in the water tank A cooling fin having a plurality of fins, and a cooling fin that is inserted between the fins of the cooling fin and attached to the water tank, and the flow path in the water tank is divided into a plurality of regions to provide cooling water. A partition wall made of a thin plate that reverses the flow, a curved portion that is formed on the inner surface of the peripheral wall of the partition wall mounting portion of the water tank, guides cooling water to the partition wall, and a heating element mounted on the plate A water-cooled cooling structure characterized by that.   The water-cooled cooling structure according to claim 2, wherein the partition wall and the curved portion are integrally formed. The water-cooled cooling structure according to claim 1, wherein the cooling fin is a corrugated fin or an extruded fin.

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