JP5225759B2 - Equipment cooling device - Google Patents

Description

  The present invention relates to a device cooling apparatus that cools components used in electric devices and electronic devices, and more particularly to an air cooling device.

  For example, a power converter used in an uninterruptible power supply has a converter that converts commercial AC power into DC power, and an inverter that converts DC power output from the converter into AC power of a desired frequency. doing. A DC main capacitor is disposed between the converter and the inverter, and is connected between the output side of the converters connected to each other and the inverter. For converters and inverters, heat-generating components that generate heat due to loss, such as IGBTs, are used. In order to reduce the loss of the entire circuit of this uninterruptible power supply, it was necessary to cool the heat generating components. An example of this cooling structure is disclosed in Patent Document 1.

  In the technique of Patent Document 1, the inside of the housing is partitioned by a shielding plate, an air inlet is formed in a part of the housing on one surface side of the shielding plate, and a fan is provided on the other surface side of the shielding plate. A plurality of air circulation ports are provided at intervals in the shielding plate. The air introduced into one surface side of the shielding plate is introduced into the other surface side of the shielding plate through each air circulation port of the shielding plate, and is discharged from the inside of the housing by the fan. Heat generating components are respectively arranged in the vicinity of the air circulation ports on one surface side of the shielding plate and cooled by air.

JP 2006-87212 A

  According to the technique of Patent Document 1, each of the heat generating components can be cooled. For example, the heat generating component is disposed in the vicinity of the air circulation port on the other surface of the shielding plate, and the other of the shielding plates from each air circulation port. The air that has flowed into the surface side and cooled the heat generating components may join together and be exhausted by the fan. In such a case, air that has cooled each heat generating component collides to generate turbulent flow, making it difficult for the air to flow, and pressure loss may deteriorate.

  An object of this invention is to provide the apparatus cooling device which is hard to generate a turbulent flow when cooling air merges.

Equipment air cooling device of one embodiment of the present invention has a housing. The housing is substantially partitioned into first and second rooms by a partition wall. The partition wall is formed with at least two air circulation ports communicating with the first and second rooms at intervals along the length direction of the partition wall. The first room is provided with air inflow means, and the second room is provided with air discharge means. The air inlet means and the air outlet means are the same as the air inlet means and the air outlet means in the above-described embodiment. At least two air flow passages are formed so as to form at least two air flow passages for joining the air flowing into the second chamber from the first room through the air flow port between the air flow ports. Means are provided in the vicinity of each air circulation port in the second room. At least two radiators are arranged in each air flow passage. At the merging position of the air flow passages, the guide means guides the air flowing through the air flow passages to the side of the air flow passages.

  In the equipment cooling device configured as described above, the air that has flowed through each air flow passage and cooled the heat radiator is guided to the side by the guide member at the merging position, so that it does not collide and generates turbulent flow. I will not let you.

Further, each of the radiators is provided with electrical components that require cooling . These electric components penetrate the partition wall and project to the first room side. Another electrical component is disposed between the electrical components on the first room side. The another electrical component and the electrical component are connected by a connector disposed in the first room. The connector is provided on a plate-like insulator positioned between the electrical components, a conductor provided on the partition wall side of the insulator, and a surface of the insulator on the other electrical component side. It is constituted by another conductor.

  Furthermore, the electrical component may be a semiconductor device for production and inverter, and the other electrical component may be a smoothing capacitor.

  As described above, according to the present invention, it is possible to prevent the occurrence of turbulent air flow and to prevent the pressure loss from deteriorating.

  The apparatus cooling device of one embodiment of the present invention is implemented in an electric apparatus such as an uninterruptible power supply or a welding machine, and has a housing 2 as shown in FIG. The housing | casing 2 is comprised by the vertically long rectangular parallelepiped shape, for example. The housing 2 includes main walls 4 and 6 arranged at intervals, an upper wall 8 that connects the upper ends of the main walls 4 and 6, and a lower wall 10 that connects the lower ends of the main walls 4 and 6. Have. Furthermore, it has a side wall which connects the both ends of the main walls 4 and 6 respectively.

  A partition wall 12 extends from the middle of the main walls 4 and 6 in the upper wall 8 toward the lower wall 10. Thereby, the inside of the housing 2 is partitioned into first and second rooms, for example, rooms 14 and 16. The tip of the partition wall 12 does not reach the lower wall 10, and an air circulation port 18 is formed between the tip of the partition wall 12 and the lower wall 10.

  In the lower part of the main wall 4, a plurality of air inflow means, for example, air inlets 20 are formed in the vertical direction. Note that a fan for allowing air to flow into the room 14 may be provided at a position in the room 14 corresponding to the air inlet 20.

  Air discharge means, for example, a fan 22 is provided on the upper wall 8 in the room 16. The fan 22 is attached to an air outlet 24 formed in the upper wall 8. When a fan is provided on the air inlet 20 side, the fan 22 can be omitted.

  On the lower wall 10 of the room 16, a transformer 26 used for an uninterruptible power supply, a welding machine, and the like is disposed. The transformer 26 flows into the room 14 from the air inlet 20 by driving the fan 22, flows into the room 16 through the air circulation port 18, and is cooled by the air discharged by the fan 22.

  On the partition wall 12 above the transformer 26, two through holes 28, 28 a are formed at intervals in the vertical direction. 32 is provided. The duct 32 is attached to the through hole 28 so as to be positioned on the room 16 side. The duct 32 has an opening that is slightly smaller than the through hole 28, and a heat radiator 34 is attached to the upper portion of the opening 32. The opening serves as an air inlet 36. A part of the radiator 34 protrudes from the upper opening of the duct 32. Accordingly, air flowing from the air inlet 36 passes through between the radiators 34, and an air flow passage is formed upward from the air outlet 37.

  Similarly, an air flow passage forming means, for example, a duct 32a is also provided in the upper through hole 28a, which has a radiator 34a, an air inlet 36a, and an air outlet 37a. However, the air inflow port 36a is located on the upper wall 8 side, and the air outflow port 37a is located below. Air flowing in from the air inlet 36a passes through between the radiators 34a, and an air flow passage is formed downward from the air outlet 37a. The ducts 32 and 32a are located on the same straight line, the air outlets 37 and 37a of the ducts 32 and 32a are opposed to each other at an interval, and the air that has flowed out of the air outlets 37 and 37a is intermediate between them. Join.

  As shown in FIG. 2, each of the through holes 28 and 28a and each of the ducts 32 and 32a are provided in a plurality in the lateral direction, for example, three each. A semiconductor switching element for converter configuration, for example, an IGBT 38 is attached to the heat radiating body 34 of each duct 32 as shown in FIG. 1 and protrudes toward the room 14 side. The converter rectifies the three-phase AC voltage transformed by the transformer 26, for example. The rectified three-phase AC voltage is converted into a direct current by a plurality of smoothing capacitors 40 provided in the room 14. Further, a semiconductor switching element for inverter configuration, for example, an IGBT 38a, is attached to the radiator 34a of each duct 32a in the same manner as the IGBT 38, and converts the DC voltage supplied from the smoothing capacitor 40 into a high frequency voltage. . The smoothing capacitors 40 are arranged at intervals.

  In order to connect each of the IGBTs 38 and 38a and the smoothing capacitor 40, a parallel conductor plate 42 is disposed close to the partition wall 12 on the room 14 side. The parallel conductor plate 42 is formed by forming conductors 46 and 46a on the partition wall 12 side of the plate-like bodies 44 and 44a formed of an insulator and on the opposite side thereof. If the IGBTs 38 and 38a and the smoothing capacitor 40 are connected with a normal connection line without using the parallel conductor plate 42, the connection line acts as a reactor and is connected to the IGBTs 38 and 38a at the moment when the IGBTs 38 and 38a are turned off. Current flows from the reactor by the line, and noise is generated. In order to prevent the generation of this noise, it is desirable to use a connection distance between the IGBTs 38 and 38a as short as possible and a connection line having a small reactance. Therefore, the parallel conductor plate 42 is used.

  Normally, the duct 32a is arranged so that air can escape from above as in the case of the duct 32. However, due to the provision of the parallel conductor plate 42, the duct 32a is attached in the opposite direction to the duct 32 and the air inlet 36a is provided. It is located above. Therefore, as described above, the air outlets 37 and 37a are opposed to each other, and the air that has flowed out of the air outlets 37 and 37a collides between them to generate turbulent flow. In order to prevent the occurrence of this turbulent flow, guide members 48 and 48a are provided at the air merging position between the air outlets 37 and 37a.

The guide member 48 is a plate-like body that is disposed obliquely with respect to the air outlet 37, and has a base end fixed to the partition wall 12 and a distal end positioned obliquely upward toward the main wall 6 side. The guide member 48a is a plate-like body disposed obliquely with respect to the air outlet 37a, and has a base end fixed to the partition wall 12 and a distal end positioned obliquely downward toward the main wall 6 side. The front ends of the guide members 48 and 48a are in contact with each other, and the side surfaces are triangular. From each other in contact with the tip of the guide members 48, 48a, the linear portion 50 towards the main wall 6 side extends perpendicularly to the main wall 6. The linear portion 50 extends to the vicinity of the back surfaces of the ducts 32 and 32a, and does not hinder the flow of air that has passed through the transformer 26. The air that has flowed out from the air outlet 37 is guided to the guide member 48 and the linear portion 50 and smoothly merges with the air that has cooled the transformer 26. The air that has flowed out from the air outlet 37a The air that has been guided by the straight portion 50 and smoothly cooled the transformer 26 does not collide with the air that flows out from the air outlets 37 and 37a to generate turbulent flow.

  In addition, although electrical components other than those described above are also arranged in the housing 2, they are not shown in the figure.

  In the equipment cooling apparatus configured as described above, when the fan 22 is driven, air flows in from the air inlets 20 and 20 and enters the room 16 through the air inlet 18 to cool the transformer 26 as described above. Then, it is discharged out of the housing 2 by the fan 22. On the other hand, part of the air in the room 14 enters the duct 32 via the air inlet 36 and passes between the radiators 34 to cool the IGBT 38 attached to the radiator 34. The remaining air in the room 14 passes between the smoothing capacitors 40, between the smoothing capacitors 40 and the main wall 4, passes through the parallel conductor plates 42, cools them, and then enters the air inlet 36 a. Enters into the duct 32a, passes between the radiators 34a, and cools the IGBT 38a attached to the radiators 34a.

  The air that has flowed out of the air outlets 37 and 37a of the ducts 32 and 32a is guided by the guide members 48 and 48a and the linear portion 50, changes its direction, and smoothly merges with the air that has cooled the transformer 26, It is discharged outside the housing 2 by the fan 22. Therefore, turbulent flow due to the air flowing out from the air outlets 37 and 37a does not occur. Note that a part of the air guided by the linear portion 50 collides with the main wall 6 of the casing 2 and cools it, so that the entire casing 2 can be prevented from becoming high temperature. In addition, the air flowing in from the air inlet 20 is branched, one of which cools the transformer 26 and the other cools the IGBTs 38 and 38a, so that these can be cooled by the low temperature air, The heat dissipation effect is high, and the loss of the circuit in the housing 2 can be reduced. Although not shown in the figure, the part arranged between the smoothing capacitor 40 and the lower wall 10 is also cooled by the air flowing in from the air inlet 20 and is located above the transformer 26. Parts not shown are also cooled by the air passing between the transformers 26.

  In the above-described embodiment, the guide members 48 and 48a are configured to use plate-like bodies so that the side surfaces thereof are substantially triangular. However, as shown in FIG. A guide member 148 having a convex semicircular side shape can also be used. In this case, a linear portion 150 directed toward the main wall 6 is provided at the center of the guide member 148, and the air flowing out from the outlets 37 and 37 a of the ducts 32 and 32 a flows along the convex surface of the guide member 148. Head to the 6th side. Further, as shown in FIG. 3B, arc-shaped guide members 248 and 248a formed in a concave shape on the main wall 6 side can also be used. In this case, linear portions 250 and 250a are integrally provided at the ends of the guide members 248 and 248a on the main wall 6 side, arranged so as to contact each other, and flow out from the outlets 37 and 37a of the ducts 32 and 32a. The air thus directed travels toward the main wall 6 along the convex surface of the guide member 148. Alternatively, as shown in FIG. 3C, the installation positions of the arc-shaped guide members 248 and 248a are shifted to the main wall 6 side, and the interval between the guide members 248 and 248a is wider than in the case of FIG. The air flowing out from the outlets 37 and 37a of the ducts 32 and 32a may pass between the straight portions 250 and 250a by passing through the convex surfaces of the guide members 248 and 248a.

  In the above embodiment, an example in which the linear portions 50, 150, 250, and 250a are provided has been described, but these can be removed. Further, in the above embodiment, the fan 22 is provided on the upper wall 8, but it may be provided on the main wall 6 in some cases. In the above embodiment, the transformer 26 is provided on the lower wall 10 side. However, the transformer 26 may be provided on the upper wall 8 side. In this case, the air inlet 18 is not necessary.

  In the above embodiment, the IGBTs 38 and 38a that are heat-generating components are configured to be cooled. However, when the air that has cooled the heat-generating components flows and the air merges, the air is weak in the vicinity where the air merges. Even when the components are arranged close to each other, it is possible to prevent the temperature rise of these heat-sensitive components by arranging the guide members as described above.

  In the above-described embodiment, the vertically long casing 2 is used. However, the present invention is not limited to this. For example, the casing 2 can be used in a laid state. Further, in the above embodiment, the guide member 28 is provided at a position where the air that has passed through the air inlets 36 and 36a arranged at intervals above and below the partition wall 12 joins. For example, an air inlet is formed on each of two opposing wall surfaces of the housing, and the air discharge formed at a position different from these air inlets at a position where the air flowing in from these two air inlets merges. It is also possible to provide the guide member so as to face the direction in which the fan is provided.

It is a vertical side view of the equipment cooling device of one embodiment of the present invention. It is a rear view of a part of the apparatus cooling device of FIG. It is a figure which shows the modification of the guide member used for the apparatus cooling device of FIG.

Explanation of symbols

2 Housing 12 Partition wall 20 Air inlet 22 Fan (air discharge means)
34 Radiator 36 36a Air inlet 38 38a IGBT (Electric parts)

Claims (2)

Internal substantially is divided into first and second chambers by a partition wall, wherein the partition wall vent port for communicating the first and second room, along the length of the partition wall at least two formed at intervals, the the first chamber is provided with air inlet means, said the second chamber and housing the air discharge means are provided,
Wherein in said second chamber so as through the vent port respectively forming at least two air flow passages is merged between the first of said air that has flowed into the second room from the room air flow port At least two air flow passage forming means provided in the vicinity of each of the air circulation ports;
At least two radiators disposed in each of the air flow passages;
Guiding means for guiding the air flowing through the air flow passages to the side of the air flow passages at the merging position of the air flow passages;
Equipped,
Each of the radiators is provided with electric components that require cooling, and these electric components pass through the partition wall and project toward the first room side, and between the electric parts on the first room side. Another electrical component is disposed on the plate, and the another electrical component is connected to the electrical component by a connector disposed in the first room, and the connector is located between the electrical components. Apparatus cooling device constituted by a cylindrical insulator, a conductor provided on the partition wall side of the insulator, and another conductor provided on the surface of the other electrical component side of the insulator . 2. The apparatus cooling apparatus according to claim 1, wherein the electrical component is a semiconductor device for rectification and an inverter, and the another electrical component is a smoothing capacitor.

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