JP7192548B2 - power converter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a power conversion device, and more particularly to a power conversion device provided with a heat exchanger.

2. Description of the Related Art Conventionally, a power conversion device including a heat exchanger is known (see Patent Literature 1, for example).

The above Patent Document 1 discloses a power conditioner that includes a storage panel and a heat exchanger that exchanges heat between the air inside the storage panel and the outside air. The air cooled by the heat exchanger circulates inside the storage panel, thereby cooling the heat sink where the reactor and the inverter circuit are arranged inside the storage panel. Further, two units including inverter circuits are provided in the storage board. The two units are arranged side by side when viewed from the front (rear) side. Also, four heat exchangers are provided on the rear surface opposite to the front surface where the opening/closing door of the storage board is provided. The four heat exchangers are arranged side by side along the direction in which the two units are arranged (horizontal direction).

JP 2016-103876 A

Here, although not specified in Patent Document 1, the unit may be placed vertically in order to reduce the installation area of the storage board by reducing the lateral width of the storage board. Placing the unit vertically means arranging the unit so that the length of the unit in the horizontal direction is smaller than the length of the unit in the vertical direction when viewed from the front of the storage board. That is, placing the unit vertically means arranging the unit so that the longitudinal direction of the unit is in the vertical direction. When the unit is placed vertically, compared to when the unit is placed horizontally, the width of the storage board in the left-right direction is reduced, so that the installation area of the storage board is reduced. Note that placing the unit horizontally means arranging the unit so that the length of the unit in the horizontal direction is larger than the length of the unit in the vertical direction when viewed from the front of the storage board. That is, placing the unit horizontally means arranging the unit so that the longitudinal direction of the unit is in the left-right direction.

Moreover, although not specified in the above Patent Document 1, each of the plurality of inverter circuits (units) may be (individually) cooled by cooling air from separate heat exchangers. When a plurality of heat exchangers are provided to correspond to each of a plurality of inverter circuits, and when the installation area of the storage panel is reduced by arranging the unit vertically, the width of the storage panel in the horizontal direction becomes small. Therefore, it may be difficult to secure a space for mounting the heat exchanger on the outer surface of the storage board in the left-right direction. In particular, when large-capacity inverter circuits (units) are arranged in parallel, it is particularly difficult to secure the above space. That is, in the conventional power conditioner (power converter) as described in Patent Document 1, while reducing the installation area of the storage board (housing part), the outer surface of the storage board (housing part) The disadvantage is that it may be difficult to attach the heat exchanger to the In this case, there is a problem that it becomes difficult to cool the inverter circuit (unit) by the heat exchanger while reducing the installation area of the storage board (casing part).

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and one object of the present invention is to reduce the installation area of the housing and provide a heat sink attached to the outer surface of the housing. An object of the present invention is to provide a power conversion device capable of facilitating cooling of a power conversion section by an exchanger.

In order to achieve the above object, a power converter according to one aspect of the present invention includes a housing part installed on an installation surface, and a front side of the housing part provided with an opening and closing door, They are arranged in a line in the left-right direction along the installation surface, have a substantially rectangular parallelepiped shape, and are attached to the housing so that the length in the left-right direction is shorter than the length in the vertical direction perpendicular to the installation surface. The plurality of power converters to be housed and the first cooling air attached to the outer surface of the housing and cooling each of the plurality of power converters are heat-exchanged with the outside air to cool the first cooling air. , and a first heat exchanger common to the plurality of power conversion units.

In the power conversion device according to one aspect of the present invention, as described above, when the length of the power conversion unit in the horizontal direction is shorter than the length of the power conversion unit in the vertical direction, the length of the power conversion unit in the horizontal direction is is longer than the vertical length of the power conversion unit, the horizontal length of the casing is relatively short. In this case, the installation area of the casing is relatively small compared to the case where the horizontal length of the power conversion unit is longer than the vertical length of the power conversion unit. Thereby, the installation area of the housing can be reduced. In addition, since the first heat exchanger is common to the plurality of power conversion units, the number of heat exchangers can be reduced compared to the case where a separate heat exchanger is provided for each of the plurality of power conversion units. . Thereby, even when the length of the housing in the left-right direction is relatively short, the first heat exchanger can be easily attached to the outer surface of the housing. As a result, it is possible to facilitate cooling of the power converter by the heat exchanger attached to the outer surface of the housing while reducing the installation area of the housing. The installation area of the housing means the area of the portion where the housing and the installation surface are in contact with each other.

In the power conversion device according to the above aspect, preferably, the outer surface of the housing includes a first side surface and a second side surface of the housing provided on both sides in the left-right direction with respect to the front of the housing, A first heat exchanger is attached to one of the first side and the second side. Here, when the length in the horizontal direction of the power conversion unit is shorter than the length in the vertical direction of the power conversion unit, when the length in the horizontal direction of the power conversion unit is longer than the length in the vertical direction of the power conversion unit, In comparison, the vertical length of the casing is relatively long. As a result, the areas of the first side surface and the second side surface become relatively large compared to the case where the length of the power conversion unit in the horizontal direction is longer than the length of the power conversion unit in the vertical direction. Thereby, the first heat exchanger can be easily attached to the housing.

In the power conversion device according to the above aspect, preferably, inside the casing, a first cooling air flow area through which the first cooling air cooled by the first heat exchanger flows along the left-right direction; and a power conversion unit arrangement region in which the power conversion units are arranged, wherein the partition members are provided between the first cooling air circulation region and each of the plurality of power conversion units. including the opening of According to this configuration, while the partitioning member separates the power conversion section arrangement area and the first cooling air circulation area, each of the plurality of openings allows the first cooling to be performed only in a predetermined area of the power conversion section arrangement area. Wind can be introduced.

In this case, preferably, the areas of the plurality of openings are different from each other according to the wind speed of the first cooling air flowing in the first cooling air flowing area. With this configuration, it is possible to easily adjust the air volume of the first cooling air passing through each of the plurality of openings. As a result, even when the distances between each of the plurality of power conversion units and the first heat exchanger are different from each other, the plurality of power conversion units can be cooled easily and uniformly.

In the power conversion device including the partition member including the plurality of openings, preferably, each of the plurality of power conversion sections includes a semiconductor element section in which a semiconductor element is provided, and extends vertically along the semiconductor element section, and a second cooling air flow region in which the first cooling air that has passed through the opening flows vertically. With this configuration, the first cooling air flowing through the second cooling air circulation area extending in the vertical direction flows along the semiconductor element portion, so that the first cooling air flowing through the second cooling air circulation area It is possible to efficiently cool the semiconductor element portion of each of the plurality of power converters.

The power conversion device according to the above aspect preferably further includes an outside air introduction unit provided on the outer surface of the housing for introducing the first outside air into the housing, wherein each of the plurality of power conversion units a semiconductor element portion provided with a semiconductor element; and heat radiation fins for radiating heat from the semiconductor element portion, wherein the semiconductor element portion is cooled by the first cooling air cooled by the first heat exchanger, and the heat radiation fins is cooled by the first outside air introduced into the housing from the outside air introduction portion. According to this structure, the semiconductor element portion can be cooled by cooling the heat radiating fins with cooling air (first outside air) different from the first cooling air. As a result, the semiconductor element section can be cooled more than when the semiconductor element section is cooled only by the first cooling air. In addition, even when the loss of the semiconductor element unit increases due to the expansion of the capacity of the power conversion unit, the cooling efficiency of the first heat exchanger is improved by improving the cooling efficiency of the heat radiating fins with the first outside air. The semiconductor element portion can be sufficiently cooled without improving the

Further, the cooling air (first outside air) for cooling the heat radiating fins and the first cooling air for cooling the semiconductor element portion can be made different from each other. As a result, unlike the case where the semiconductor element portion is cooled by the first outside air, it is possible to suppress adhesion of foreign matter (dust) or the like from the outside of the housing portion to the semiconductor element portion.

In this case, preferably, each of the plurality of power converters further includes an electronic board that transmits an electrical signal to the semiconductor element of the semiconductor element section, and further includes a reactor connected to each of the plurality of power converters, Each of the electronic substrates of the plurality of power converters is cooled by first cooling air cooled by the first heat exchanger, and each of the plurality of reactors is cooled by the second outside air introduced into the housing from the outside air introduction portion. cooled by According to this configuration, the semiconductor element section, the electronic substrate, and the reactor can be cooled by cooling air different from each other. As a result, compared with the case where the reactor is cooled by the first cooling air, it is possible to prevent the cooling efficiency of the first cooling air for the semiconductor element section and the electronic substrate from being lowered.

In the power conversion device in which the reactor is cooled by the second outside air, preferably, the housing part includes a first duct part through which the first outside air flows, and a first duct part through which the second outside air flows and which is separate from the first duct part. and a second duct portion provided in the second duct portion. With this configuration, the first outside air and the second outside air can be circulated separately, so that each of the first outside air and the second outside air can be efficiently circulated.

In this case, preferably, the reactor is housed in the housing section separated from the power conversion section. With this configuration, mixing of the first outside air and the second outside air can be suppressed, so that each of the first outside air and the second outside air can be circulated more efficiently.

In the power conversion device in which the power conversion section includes a semiconductor element and heat dissipation fins, preferably, in each of the plurality of power conversion sections, the heat dissipation fins and the semiconductor element section are arranged adjacent to each other along the left-right direction. It is With this configuration, compared to the case where the heat radiation fins are provided on the back side of the housing with respect to the semiconductor element section, the maintenance of the heat radiation fins can be performed with the opening/closing door on the front of the housing opened. The work to be done can be facilitated.

In the power conversion device in which the power conversion section includes a semiconductor element and heat radiation fins, preferably, an isolation member is provided between the semiconductor element section and the heat radiation fins and isolates the first outside air from the first cooling air. Prepare. With this configuration, it is possible to suppress the mixing of the first outside air and the first cooling air. Can be done individually.

In the power conversion device according to the above aspect, preferably, the outer surface of the housing includes a first side surface and a second side surface of the housing provided on both sides in the left-right direction with respect to the front of the housing, The first heat exchanger is attached to the first side surface, attached to the second side surface, provided on the second side surface side with respect to the plurality of power conversion units in the housing, and connected to the plurality of power conversion units. It further includes a second heat exchanger that cools the second cooling air by exchanging heat between the second cooling air that cools the electronic device and outside air. With this configuration, unlike the case where the electronic device is cooled by the first cooling air, the heat of the electronic device is dissipated by the first cooling air. can be suppressed.

In the power conversion device according to the above aspect, it is preferably attached to the outer surface of the housing, provided in the housing on the front side or the back side of the housing with respect to the plurality of power conversion sections, and the plurality of It further includes a third heat exchanger that cools the third cooling air by exchanging heat between the third cooling air that cools the electrical equipment connected to each of the power converters and outside air. With this configuration, by cooling the electrical equipment with the third cooling air from the third heat exchanger, unlike the case where the electrical equipment is cooled with the first cooling air, the heat of the electrical equipment is transferred to the first cooling air. It is possible to suppress a decrease in the cooling efficiency of the power converter due to the first cooling air due to the heat being radiated to the first cooling air.

According to the present invention, as described above, it is possible to facilitate cooling of the power conversion unit by the heat exchanger attached to the outer surface of the housing while reducing the installation area of the housing. .

1 is a perspective view of a housing of a power conditioner according to one embodiment; FIG. It is the front view which looked at the housing|casing part of the power conditioner by one Embodiment from the front side. It is the back view which looked at the housing|casing part of the power conditioner by one Embodiment from the back side. FIG. 2 is a side view of one side of the housing of the power conditioner according to one embodiment; FIG. 4 is a side view of the other side of the housing of the power conditioner according to one embodiment; 4 is a partially enlarged view of FIG. 3; FIG. FIG. 4 is a diagram for explaining the outer shape of an inverter unit of a power conditioner according to one embodiment; FIG. 4 is a rear view of the inside of the housing of the power conditioner according to the embodiment, viewed from the rear side; FIG. 3 is a perspective view of the inside of the housing of the power conditioner according to one embodiment, as seen from the rear side; FIG. 4 is an enlarged plan view of the vicinity of the opening of the partition member of the power conditioner according to the embodiment; It is the perspective view which looked at the inverter unit of the power conditioner by one Embodiment from the diagonally downward direction. It is the perspective view which looked at the inverter unit of the power conditioner by one Embodiment from diagonally upward. Figure 3 is a cross-sectional view taken along line 200-200 of Figure 2; Figure 3 is a cross-sectional view taken along line 300-300 of Figure 2; It is the front view which looked at the inside of the housing|casing part of the power conditioner by one Embodiment from the front side. 1 is a plan view of a housing of a power conditioner according to one embodiment; FIG. It is the figure which showed the circuit structure of the power conditioner by one Embodiment.

Embodiments embodying the present invention will be described below with reference to the drawings.

[This embodiment]
A configuration of a power conditioner 100 according to the present embodiment will be described with reference to FIGS. 1 to 17. FIG. It should be noted that the power conditioner 100 is an example of a "power converter" in the scope of claims.

(Configuration of power conditioner)
As shown in FIG. 1, the power conditioner 100 includes a housing section 10 installed on an outdoor installation surface 100a (see FIG. 2). The housing part 10 has a substantially rectangular parallelepiped shape. That is, the housing part 10 is configured to be covered from six directions by the outer surface 10a. Note that the installation surface 100a is omitted from the drawings for the sake of simplification except in FIG.

The outer surface 10 a of the housing portion 10 includes the front surface 1 . The front face 1 is provided with an opening/closing door 1a. A plurality (four in this embodiment) of the opening/closing doors 1a are arranged side by side along the X direction in FIG. A handle portion 1b is attached to each of the plurality of opening/closing doors 1a. Note that the X direction is an example of the "left-right direction" in the scope of claims.

The outer surface 10a of the housing 10 includes side surfaces 2 and 3 (see FIG. 2) of the housing 10 provided on both sides of the front surface 1 of the housing 10 in the X direction. Power conditioner 100 includes heat exchanger 20 and heat exchanger 21 attached to side surface 2 . The heat exchangers 20 and 21 are arranged side by side along the Y direction orthogonal to the X direction on the installation surface 100a. Specifically, the heat exchanger 20 is provided on the front surface 1 side (Y1 direction side) of the heat exchanger 21 . The heat exchanger 20 and the heat exchanger 21 are examples of the "third heat exchanger" and the "second heat exchanger", respectively. Moreover, the side surface 2 and the side surface 3 are examples of the "second side surface" and the "first side surface" in the scope of claims, respectively.

Moreover, as shown in FIG. 2 , the power conditioner 100 includes a heat exchanger 30 attached to the side surface 3 . Specifically, side 3 is fitted with a single heat exchanger 30 . The heat exchanger 30 is arranged on the side surface 3 at a position facing the heat exchanger 21 in the X direction (see FIG. 16). The heat exchanger 30 is an example of the "first heat exchanger" in the claims.

In addition, the outer surface 10 a of the housing portion 10 includes the ceiling surface 4 . The ceiling surface 4 is provided on the side opposite to the installation surface 100a side (Z1 direction side) with respect to the front surface 1, the side surface 2, the side surface 3, and the rear surface 5, which will be described later.

As shown in FIG. 3, the outer surface 10a of the housing portion 10 includes the rear surface 5. As shown in FIG. The power conditioner 100 has an air intake duct 50 provided on the rear surface 5 . The air intake duct 50 is provided to introduce the outside air 62 a (see FIG. 13) and the outside air 62 b (see FIG. 13) into the housing section 10 . A plurality of air intake ducts 50 are attached to the rear surface 5 of the housing section 10 . It should be noted that only one air intake duct 50 may be attached to the rear surface 5 . In addition, the air intake duct 50 is an example of the "outside air introduction section" in the scope of claims. The outside air 62a and the outside air 62b are examples of the "first outside air" and the "second outside air", respectively, in the claims.

Specifically, on the rear surface 5, five intake ducts 50 are provided at positions facing each of the three opening/closing doors 1a on the X1 direction side of the opening/closing doors 1a (see FIG. 2) of the front surface 1 in the Y direction. They are arranged side by side in the Z direction. That is, 15 intake ducts 50 are attached to the rear surface 5 . An opening/closing door 5a is provided on the rear surface 5 at a position opposite to the opening/closing door 1a closest to the X2 direction among the opening/closing doors 1a of the front face 1 in the Y direction. The opening/closing door 5a is provided with a handle portion 5b. Note that the Z direction is an example of the "vertical direction" in the scope of claims.

As shown in FIG. 4, the heat exchanger 30 includes a suction port 30a for sucking the outside air 60 (see FIG. 6) and a discharge port 30b for discharging the outside air 60 sucked into the suction port 30a to the outside. The suction port 30a is provided on the installation surface 100a side (Z2 direction side) of the discharge port 30b. A fan (not shown) for sucking the outside air 60 is provided at the suction port 30a.

Further, as shown in FIG. 5, the heat exchanger 20 includes an intake port 20a for sucking outside air, and a discharge port 20b for discharging the outside air (not shown) sucked into the intake port 20a to the outside. The suction port 20a is provided on the installation surface 100a side (Z2 direction side) of the discharge port 20b. The heat exchanger 21 also includes an intake port 21a that draws in outside air, and an outlet port 21b that discharges the outside air (not shown) drawn into the intake port 21a to the outside. The suction port 21a is provided on the installation surface 100a side (Z2 direction side) of the discharge port 21b. Each of the suction port 20a and the suction port 21a is provided with a fan (not shown) for sucking outside air.

Moreover, as shown in FIG. 6 , the heat exchanger 30 includes a heat radiating member 31 provided inside the heat exchanger 30 . Each of the suction port 30a and the discharge port 30b is provided on the opposite side (the X1 direction side) of the heat radiating member 31 from the housing section 10 side. The heat radiating member 31 prevents the outside air 60 sucked through the suction port 30 a from flowing into the housing portion 10 . In addition, although the heat radiating member 31 is illustrated as having a flat plate shape in FIG. 6, it is not limited to this shape.

The heat exchanger 30 also includes a suction port 32 a that sucks the cooling air 61 flowing through the housing 10 into the heat exchanger 30 . The heat exchanger 30 also includes a discharge port 32b that discharges the cooling air 61 sucked through the suction port 32a into the housing portion 10. As shown in FIG. Each of the suction port 32 a and the discharge port 32 b is provided on the housing section 10 side (X2 direction side) with respect to the heat dissipation member 31 . In addition, the suction port 32a is provided on the opposite side (Z1 direction side) of the discharge port 32b to the installation surface 100a side. A fan (not shown) for sucking the cooling air 61 inside the housing 10 is provided at the suction port 32a. The cooling air 61 is an example of "first cooling air" in the scope of claims.

In addition, the heat-radiating member 31 of the heat exchanger 30 exchanges heat between the outside air 60 flowing along the heat-radiating member 31 and the cooling air 61 flowing along the heat-radiating member 31 . As a result, the heat of the cooling air 61 is radiated to the outside air 60 and the cooling air 61 is cooled.

Further, as shown in FIG. 7, the power conditioners 100 are arranged in a line in the X direction along the installation surface 100a in the housing unit 10 when viewed from the front 1 (FIG. 7 is a view viewed from the back 5). A plurality of (three in this embodiment) inverter units 6 arranged side by side are provided. Each of the plurality of inverter units 6 has three air intake ducts 50 on the Z1 direction side among five air intake ducts 50 (see FIG. 3) arranged side by side in the Z direction when viewed from the front surface 1 (rear surface 5) side. is provided so as to overlap with the Also, the inverter unit 6 includes a plurality of electronic devices such as an IGBT element 6c, which will be described later, and the plurality of electronic devices are provided as one module. A plurality of inverter units 6 (inverter circuits 6d described later) are connected in parallel (see FIG. 17). In addition, the inverter unit 6 is an example of the "power converter" in the scope of claims.

Moreover, each of the plurality of inverter units 6 has a substantially rectangular parallelepiped shape. Specifically, when viewed from the front 1, the inverter unit 6 has a length L1 in the X direction that is shorter (smaller) than a length L2 in the Z direction orthogonal to the installation surface 100a. Specifically, the length L1 is less than or equal to half the length L2.

In addition, the X-direction length L3 of the heat exchanger 30 is shorter (smaller) than the X-direction length L1 of the inverter unit 6 . The heat exchanger 20 and the heat exchanger 21 are approximately the same size as the heat exchanger 30 .

Here, in the present embodiment, as shown in FIG. 8, the heat exchanger 30 performs cooling by exchanging heat between the cooling air 61 that cools each of the plurality of inverter units 6 and the outside air 60 (see FIG. 6). It is a heat exchanger common to the plurality of inverter units 6 that cools the wind 61 . Specifically, the cooling air 61 discharged into the housing 10 from the outlet 32b (see FIG. 6) of the heat exchanger 30 branches into a plurality of (the same number as the inverter units 6) cooling air 61. . The branched cooling air 61 cools each of the plurality of inverter units 6 .

As shown in FIG. 9 , an inverter unit arrangement area 11 in which a plurality of inverter units 6 are arranged is provided inside the housing section 10 . Inside the casing 10, a cooling air circulation area 12 is provided in which the cooling air 61 (see FIG. 8) is circulated by the heat exchanger 30 along the X direction. The cooling air circulation area 12 is provided on the installation surface 100a (see FIG. 2) side (Z2 direction side) of the inverter unit arrangement area 11 . In addition, the cooling air circulation region 12 is provided to extend in the X direction on the side opposite to the heat exchanger 30 side (the X2 direction side) of the discharge port 32b. That is, the cooling air flow area 12 is provided at substantially the same height position in the Z direction as the discharge port 32b. Note that the inverter unit arrangement area 11 and the cooling air circulation area 12 are examples of the "power converter arrangement area" and the "first cooling air circulation area" in the scope of claims, respectively.

In addition, power conditioner 100 includes partitioning member 13 that partitions cooling air circulation region 12 and inverter unit arrangement region 11 in housing portion 10 . The partition member 13 has a plate-like shape extending along the XY plane. Also, each of the plurality of inverter units 6 is mounted on the partition member 13 .

Here, in the present embodiment, partition member 13 includes a plurality of openings 130 provided between cooling air circulation region 12 and each of the plurality of inverter units 6 . Specifically, the opening 130 is provided on the installation surface 100a side (Z2 direction side) of each of the three inverter units 6 . Specifically, the plurality of openings 130 includes an opening 130a provided on the Z2 direction side of the inverter unit 6 closest to the heat exchanger 30 (X1 direction side). Further, the plurality of openings 130 includes an opening 130 b provided on the Z2 direction side of the central inverter unit 6 of the three inverter units 6 . The plurality of openings 130 includes an opening 130c provided on the Z2 direction side of the inverter unit 6 closest to the heat exchanger 21 (see FIG. 7) (X2 direction side).

Further, as shown in FIG. 10 , the areas of the plurality of openings 130 are configured to differ from each other according to the wind speed of the cooling air 61 flowing in the cooling air circulation area 12 . For example, openings 130a and 130b are provided with shielding plates 131a and 131b, respectively. In this case, the area of the opening 130a and the area of the opening 130b are 50% and 70%, respectively, of the opening 130c provided with no shielding plate. That is, the area is smaller in order from the opening 130 on the upstream side of the cooling air 61 (on the side of the heat exchanger 30). Note that the aperture ratios of 50% and 70% are examples, and different aperture ratios may be used according to the wind speed of the cooling air 61 . Shielding plate 131a and shielding plate 131b may be fixedly attached to opening 130a and opening 130b, respectively, or may be slidably attached to opening 130a and opening 130b. Wire netting may be attached to the openings 130a and 130b instead of the shielding plates (131a, 131b). In FIG. 9, the illustration of the shielding plate 131a and the shielding plate 131b is omitted for simplification.

Specifically, when the wind speed of the cooling air 61 circulating in the cooling air circulation area 12 is relatively low, the amount of the cooling air 61 trying to move in the X2 direction (the direction away from the heat exchanger 30) is Relatively few. In this case, as described above, the air volume of the cooling air 61 passing through the openings 130a to 130c is made uniform by sequentially decreasing the area from the opening 130 on the upstream side (heat exchanger 30 side) of the cooling air 61. be.

On the other hand, when the wind speed of the cooling air 61 flowing through the cooling air circulation area 12 is relatively high, more cooling air 61 tries to move in the X2 direction (the direction away from the heat exchanger 30). In this case, by providing a shielding plate in the opening 130c and not providing the shielding plate 131a (shielding plate 131b) in the opening 130a (opening 130b), the cooling air 61 passing through the openings 130a to 130c is The air volume may be made uniform. The wind speed of the cooling air 61 flowing through the cooling air circulation area 12 depends on the density of wiring and the like provided in the cooling air circulation area 12 and the fan (see FIG. 6) provided at the suction port 32a (see FIG. 6). (not shown) ability. A shielding plate may be provided for each of the openings 130a to 130c, or the areas of the openings 130a to 130c may be different from each other without a shielding plate.

Further, as shown in FIG. 11, an opening 6b is provided in a bottom surface 6a of the inverter unit 6 (a surface on the partition member 13 side). The opening 6b has substantially the same area and shape as the opening 130 (the opening 130 without the shielding plate 131a and the shielding plate 131b). It is provided so as to substantially overlap with the opening 130 when viewed from the Z1 direction side. The area (shape) of the opening 130 and the area (shape) of the opening 6b may be different from each other.

Further, as shown in FIG. 9, each of the plurality of inverter units 6 includes an inverter circuit 6d provided with an IGBT (Insulated Gate Bipolar Transistor) element 6c. Also, each of the plurality of inverter units 6 includes a printed circuit board 6e that transmits electrical signals to the IGBT elements 6c of the inverter circuit 6d. Specifically, in each inverter unit 6, three inverter circuits 6d and three printed circuit boards 6e (three for U-phase, V-phase, and W-phase) are provided side by side in the Z direction. there is The printed board 6e is an example of an "electronic board" in the scope of claims. The inverter circuit 6d and the IGBT element 6c are examples of the "semiconductor element section" and the "semiconductor element" in the claims, respectively.

Moreover, the printed circuit board 6e is provided so as to extend in the Z direction. Specifically, the printed circuit board 6e is provided so as to extend along the XZ plane. The inverter circuit 6d is provided on the printed circuit board 6e on the heat exchanger 30 side (X1 direction side).

Here, in the present embodiment, as shown in FIG. 11, each of the plurality of inverter units 6 has a cooling air circulation region 6f in which the cooling air 61 that has passed through the opening 130 (and the opening 6b) flows in the Z direction. including. The cooling air circulation area 6f is provided so as to extend in the Z direction along the inverter circuit 6d (see FIG. 9). Specifically, the inverter circuit 6d is provided on the side of the heat exchanger 30 (X1 direction side) in the cooling air flow area 6f. Further, the printed circuit board 6e is provided on the back surface 5 side (Y2 direction side) in the cooling air flow area 6f. That is, the cooling air 61 flowing through the cooling air circulation area 6f moves toward the ceiling surface 4 (Z1 direction) while being guided by the inverter circuit 6d and the printed circuit board 6e. As a result, the cooling air 61 circulating in the cooling air circulating region 6f moves in the Z1 direction while cooling the inverter circuit 6d and the printed circuit board 6e. The cooling air circulation area 6f is an example of the "second cooling air circulation area" in the scope of claims.

Further, as shown in FIG. 9, each of the plurality of inverter units 6 includes heat radiation fins 6g that radiate heat from the inverter circuit 6d. Moreover, each of the plurality of inverter units 6 includes a metal plate-like member 6h to which the radiation fins 6g are attached. In each inverter unit 6, three plate-like members 6h (three for U-phase, V-phase, and W-phase) are arranged side by side in the Z direction, similar to inverter circuit 6d and printed circuit board 6e. ing. A radiation fin 6g is attached to each of the three plate members 6h of each inverter unit 6. As shown in FIG. A plurality of radiation fins 6g are attached to the plate member 6h so as to be arranged side by side in the Z direction. The plate member 6h is an example of the "separation member" in the scope of claims.

Specifically, the plate member 6h is provided so as to extend along the YZ plane. The radiation fins 6g are attached to the surface of the plate member 6h on the heat exchanger 30 side (X1 direction side).

Here, in this embodiment, in each of the plurality of inverter units 6, the radiation fin 6g and the inverter circuit 6d are arranged adjacent to each other along the X direction. Specifically, the inverter circuit 6d is provided on the heat exchanger 21 (see FIG. 8) side (X2 direction side) of the radiation fins 6g (and the plate member 6h). Specifically, the inverter circuit 6d (IGBT element 6c) is arranged on the surface of the plate-like member 6h on the X2 direction side (the surface opposite to the surface on which the radiation fins 6g are attached).

Further, as shown in FIG. 12, an opening 6j is provided in the upper surface 6i of the inverter unit 6 (the surface opposite to the bottom surface 6a). The cooling air 61 (see FIG. 8) flowing through the cooling air circulation area 6f passes through the opening 6j. After passing through the openings 6j of each inverter unit 6, the cooling air 61 flows into the cooling air circulation area 14 (see FIG. 9) on the upper side (Z1 direction side) of the inverter unit arrangement area 11 (see FIG. 9). . The cooling air 61 flowing into the cooling air circulation area 14 flows through the cooling air circulation area 14 and is sucked into the suction port 32 a (see FIG. 9) of the heat exchanger 30 . That is, the cooling air 61 circulates through the heat exchanger 30, the cooling air circulation area 12, the cooling air circulation area 6f, and the cooling air circulation area . The areas of the openings 6j of the plurality of inverter units 6 are substantially equal to each other.

Further, in the present embodiment, as shown in FIG. 13, the heat radiation fins 6g are cooled by outside air 62a introduced into the housing 10 from the intake duct 50. As shown in FIG. Specifically, the outside air 62a introduced into the housing 10 from three of the five air intake ducts 50 arranged in the Z direction on the Z1 direction side (Y2 direction side) is sucked by the fan 51 provided. The fan 51 is provided so as to overlap the radiation fins 6g when viewed from the rear surface 5 side (Y2 direction side). Since three fans 51 are provided for each inverter unit 6 , a total of nine fans 51 are provided inside the housing 10 . Then, the outside air 62a sucked by the fan 51 flows toward the front surface 1 side (Y1 direction side) along the radiation fins 6g.

Here, since the cooling air 61 flows in the cooling air circulation area 6f in the Z direction, the cooling air 61 and the outside air 62a are arranged so as to be substantially orthogonal to each other in the inverter unit 6 when viewed from the side surface 3 (X1 direction). distributed to Inverter unit 6 is cooled (hybrid cooled) by both cooling air 61 and outside air 62a. The cooling air 61 and the outside air 62a are isolated (partitioned) by the plate member 6h provided between the inverter circuit 6d and the heat radiation fin 6g, so that they do not cross each other.

The outside air 62a that has circulated in the Y1 direction along the radiation fins 6g flows into the duct 52a that extends in the Z direction, and circulates in the Z1 direction through the duct 52a. Outside air 62a circulating in the Z1 direction through the duct 52a flows into the roof portion 4a provided on the ceiling surface 4 side, and is provided on the Y1 direction side of the roof portion 4a (the Y1 direction side relative to the front surface 1). The liquid is discharged to the outside from the discharge port 4b (see FIG. 14). The discharge port 4b is provided on the lower surface 4c (see FIG. 14) of the roof portion 4a so as to face the installation surface 100a (see FIG. 2). A metal mesh is attached to the outlet 4b to prevent insects and the like from entering the housing 10. As shown in FIG.

Moreover, as shown in FIG. 13 , the power conditioner 100 includes a reactor 15 a connected to each of the plurality of inverter units 6 . That is, the power conditioner 100 includes a plurality of reactors 15a (the same number as the inverter unit 6). Reactor 15 a is arranged in a reactor arrangement area 15 provided on the installation surface 100 a side (Z2 direction side) of inverter unit arrangement area 11 and cooling air circulation area 12 in housing portion 10 . That is, the multiple reactors 15a are arranged side by side along the X direction.

In addition, the reactor 15 a (reactor arrangement area 15 ) is housed inside the housing part 10 while being separated from the inverter unit 6 (inverter unit arrangement area 11 ). Specifically, reactor 15a (reactor arrangement area 15) is isolated from inverter unit 6 (inverter unit arrangement area 11) by cooling air flow area 12 (partition member 13, etc.). As a result, outside air 62a and cooling air 61 flowing through inverter unit 6 (inverter unit arrangement area 11) and outside air 62b flowing through reactor 15a (reactor arrangement area 15) interfere with each other (mix). no.

Here, in the present embodiment, each of the plurality of reactors 15a is cooled by outside air 62b introduced into the housing 10 from the intake duct 50. As shown in FIG. Specifically, the outside air 62 b introduced into the housing 10 from two of the five intake ducts 50 arranged in the Z direction, which are located on the Z2 direction side, flows into the reactor arrangement area 15 . The outside air 62b that has flowed into the reactor arrangement area 15 and cooled the reactor 15a flows in the Z1 direction through a duct 52b provided separately from the duct 52a. The duct 52b is provided on the front 1 side (Y1 direction side) of the duct 52a so as to extend in the Z direction along the duct 52a. The outside air 62b that flows in the Z1 direction through the duct 52b flows into the roof portion 4a and is discharged to the outside from the discharge port 4b. The outside air 62a flowing through the duct 52a and the outside air 62b flowing through the duct 52b do not interfere (mix). The duct 52a and the duct 52b are examples of the "first duct section" and the "second duct section" in the claims, respectively.

Further, as shown in FIG. 8 , an electronic device 16 a is provided in the housing 10 on the side 2 (X2 direction side) of the plurality of inverter units 6 . The electronic device 16 a is connected to the plurality of inverter units 6 . Specifically, the electronic device 16 a includes a printed circuit board and the like for controlling the power conditioner 100 . The electronic equipment 16 a is arranged in the electronic equipment arrangement area 16 on the side surface 2 side (X2 direction side) of the inverter unit arrangement area 11 and the reactor arrangement area 15 . Also, the arrangement position of the electronic device 16a in FIG. 8 (the position of the dashed line portion) is an example, and the present invention is not limited to this.

Here, in the present embodiment, the heat exchanger 21 cools the cooling air 63 by exchanging heat between the cooling air 63 for cooling the electronic device 16a and outside air (not shown). Specifically, the cooling air 63 circulates so as to circulate through the heat exchanger 21 and the electronic device arrangement area 16 . Note that the electronic device 16a is provided as one module. Also, the cooling air 63 is an example of the "second cooling air" in the claims.

Further, as shown in FIG. 15 , an electric device 17 is provided on the front surface 1 side (Y1 direction side) of each of the plurality of inverter units 6 in the housing portion 10 . Electric equipment 17 is connected to each of the plurality of inverter units 6 . Specifically, the electric device 17 includes an input-side circuit breaker 17a that controls switching between the inverter circuit 6d and the input-side solar panel 101 (see FIG. 17). The electrical device 17 also includes an EMC (Electro Magnetic Compatibility) filter 17b for reducing noise in the inverter circuit 6d. A lead wire (not shown) from the electric device 17 is introduced into the inverter unit 6 through an opening 6j (see FIG. 12) of the inverter unit 6. As shown in FIG.

Here, in the present embodiment, the heat exchanger 20 cools the cooling air 64 by exchanging heat between the cooling air 64 for cooling the electric device 17 and outside air (not shown). Specifically, the cooling air 64 cools the electric device 17 corresponding to each inverter unit 6 and the output side circuit breaker 18 provided on the front side 1 (Y1 direction side) of the electronic device 16a (see FIG. 8). do. That is, the heat exchanger 20 is a heat exchanger common to multiple electrical devices. Also, the cooling air 64 is circulated in the front area 19 (see FIG. 16) where the heat exchanger 20, the electrical equipment 17 connected to each inverter unit 6, and the output side circuit breaker 18 are provided. circulate. The output side circuit breaker 18 is configured to control switching between the plurality of inverter circuits 6d and the power system 102 (see FIG. 17) on the output side. Also, the cooling air 64 is an example of the "third cooling air" in the scope of claims.

[Effect of this embodiment]
The following effects can be obtained in this embodiment.

In the present embodiment, as described above, the power conditioners 100 are arranged in a line in the X direction when viewed from the front 1 side, and have a substantially rectangular parallelepiped shape, and the length L1 in the X direction is A plurality of inverter units 6 housed in the housing 10 so as to be shorter than the length L2 in the Z direction are provided. In addition, common to the plurality of inverter units 6, which is attached to the side surface 3 of the housing unit 10 and cools the cooling air 61 by exchanging heat between the cooling air 61 for cooling each of the plurality of inverter units 6 and the outside air 60. The power conditioner 100 is configured to include the heat exchanger 30 of As a result, when the length L1 of the inverter unit 6 in the X direction is shorter than the length L2 of the inverter unit 6 in the Z direction, the length L1 of the inverter unit 6 in the X direction becomes the length of the inverter unit 6 in the Z direction. The length of the housing 10 in the X direction is relatively short compared to when it is longer than L2. In this case, compared to the case where the length L1 of the inverter unit 6 in the X direction is longer than the length L2 of the inverter unit 6 in the Z direction, the installation area of the housing 10 is relatively small. In addition, since the heat exchanger 30 is common to the plurality of inverter units 6, the number of heat exchangers 30 can be reduced compared to the case where a separate heat exchanger is provided for each of the plurality of inverter units 6. . Thereby, the heat exchanger 30 can be easily attached to the outer surface 10a of the housing 10 even when the length L1 of the housing 10 in the X direction is relatively short. As a result, it is possible to facilitate cooling of the inverter unit 6 by the heat exchanger 30 attached to the outer surface 10 a of the housing 10 while reducing the installation area of the housing 10 .

Moreover, in this embodiment, the power conditioner 100 is configured such that the heat exchanger 30 is attached to the side surface 3 as described above. Here, when the length L1 of the inverter unit 6 in the X direction is shorter than the length L2 of the inverter unit 6 in the Z direction, the length L1 of the inverter unit 6 in the X direction becomes the length of the inverter unit 6 in the Z direction. The length of the housing 10 in the Z direction is relatively long compared to when it is longer than L2. As a result, compared to the case where the length L1 of the inverter unit 6 in the X direction is longer than the length L2 of the inverter unit 6 in the Z direction, the areas of the side surfaces 3 and 2 are relatively large. Thereby, the heat exchanger 30 can be easily attached to the housing portion 10 .

In addition, in the present embodiment, as described above, the power conditioner 100 has the cooling air circulation area 12 in which the cooling air 61 cooled by the heat exchanger 30 flows along the X direction inside the housing part 10. and an inverter unit arrangement area 11 in which a plurality of inverter units 6 are arranged. Power conditioner 100 is configured such that partitioning member 13 includes a plurality of openings 130 ( 130 a to 130 c ) provided between cooling air circulation region 12 and each of the plurality of inverter units 6 . As a result, while partitioning member 13 partitions inverter unit arrangement area 11 and cooling air circulation area 12, each of a plurality of openings 130 (130a to 130c) allows a predetermined area (cooling airflow) of inverter unit arrangement area 11 to be The cooling air 61 can be introduced only into the flow area 6f).

Further, in the present embodiment, as described above, the areas of the plurality of openings 130 (130a to 130c) are different from each other according to the wind speed of the cooling air 61 flowing in the cooling air circulation area 12. A power conditioner 100 is configured. This makes it possible to easily adjust the air volume of the cooling air 61 passing through each of the plurality of openings 130 (130a to 130c). As a result, even when the distances between each of the plurality of inverter units 6 and the heat exchanger 30 are different from each other, the plurality of inverter units 6 can be cooled easily and uniformly.

Further, in the present embodiment, as described above, each of the plurality of inverter units 6 extends in the Z direction along the inverter circuit 6d provided with the IGBT element 6c and the inverter circuit 6d and passes through the opening 130. The power conditioner 100 is configured to include a cooling air flow area 6f through which the cooling air 61 flows in the Z direction. As a result, the cooling air 61 circulating in the cooling air circulating region 6f extending in the vertical direction circulates along the inverter circuit 6d. The inverter circuit 6d can be efficiently cooled.

Further, in the present embodiment, as described above, the inverter circuit 6d is cooled by the cooling air 61 cooled by the heat exchanger 30, and the heat radiation fins 6g are introduced into the housing 10 from the air intake duct 50. The power conditioner 100 is configured to be cooled by the outside air 62a. As a result, the cooling air (outside air 62a) different from the cooling air 61 cools the radiating fins 6g, thereby cooling the inverter circuit 6d. As a result, the inverter circuit 6 d can be cooled more than when the inverter circuit 6 d is cooled only by the cooling air 61 . Further, even when the loss of the inverter circuit 6d increases due to the expansion of the capacity of the inverter unit 6, the cooling efficiency of the heat exchanger 30 is improved by improving the cooling efficiency of the radiation fins 6g by the outside air 62a. The inverter circuit 6d can be sufficiently cooled without any improvement.

Also, the cooling air (outside air 62a) that cools the radiation fins 6g and the cooling air 61 that cools the inverter circuit 6d can be made different from each other. As a result, unlike the case where the inverter circuit 6d is cooled by the outside air 62a, it is possible to prevent foreign matter (dust) from adhering to the inverter circuit 6d.

Further, in the present embodiment, as described above, the printed circuit board 6e of each of the plurality of inverter units 6 is cooled by the cooling air 61 cooled by the heat exchanger 30, and each of the plurality of reactors 15a is connected to the intake duct. The power conditioner 100 is configured so as to be cooled by the outside air 62 b introduced into the housing 10 from 50 . As a result, the inverter circuit 6d, the printed circuit board 6e, and the reactor 15a can be cooled by cooling air different from each other. As a result, compared with the case where the reactor 15a is cooled by the cooling air 61, it is possible to prevent the cooling efficiency of the cooling air 61 with respect to the inverter circuit 6d and the printed circuit board 6e from decreasing.

Further, in the present embodiment, as described above, the housing 10 is provided with the duct 52a through which the outside air 62a circulates and the duct 52b through which the outside air 62b circulates and which is provided separately from the duct 52a. , the power conditioner 100 is configured. As a result, the outside air 62a and the outside air 62b can be circulated separately, so that each of the outside air 62a and the outside air 62b can be efficiently circulated.

In addition, in the present embodiment, the power conditioner 100 is configured so that the reactor 15a is housed in the housing part 10 while being isolated from the inverter unit 6, as described above. As a result, mixing of the outside air 62a and the outside air 62b can be suppressed, so that each of the outside air 62a and the outside air 62b can be circulated more efficiently.

Further, in the present embodiment, as described above, in each of the plurality of inverter units 6, the power conditioner is arranged such that the heat radiation fin 6g and the inverter circuit 6d are arranged adjacent to each other along the X direction. 100. As a result, compared to the case where the heat radiation fins 6g are provided on the back surface 5 side of the housing unit 10 with respect to the inverter circuit 6d, the heat radiation fins 6g can be dissipated when the opening/closing door 1a on the front surface 1 of the housing unit 10 is opened. maintenance work can be facilitated.

Further, in the present embodiment, the power conditioner 100 is configured to include the plate member 6h that isolates the outside air 62a and the cooling air 61 as described above. As a result, it is possible to prevent the external air 62a from mixing with the cooling air 61, so that the cooling of the radiating fins 6g by the external air 62a and the cooling of the inverter unit 6 by the cooling air 61 can be performed independently of each other.

Further, in the present embodiment, as described above, the electronic device is attached to the side surface 2, is provided on the side surface 2 side with respect to the plurality of inverter units 6 in the housing part 10, and is connected to the plurality of inverter units 6. The power conditioner 100 is configured to include the heat exchanger 21 that cools the cooling air 63 by exchanging heat between the cooling air 63 that cools the power conditioner 16a and the outside air. As a result, unlike the case where the electronic device 16a is cooled by the cooling air 61, the cooling efficiency of the inverter unit 6 by the cooling air 61 is prevented from decreasing due to the heat of the electronic device 16a being radiated by the cooling air 61. can be suppressed.

In addition, in the present embodiment, as described above, the inverter units 6 are attached to the side surface 2 of the housing 10 and provided on the front surface 1 side of the housing 10 with respect to the plurality of inverter units 6 in the housing 10. The power conditioner 100 is configured to include a heat exchanger 20 that cools the cooling air 64 by exchanging heat between the cooling air 64 that cools the electric equipment 17 connected to each of the inverter units 6 and the outside air. do. Thus, by cooling the electrical equipment 17 with the cooling air 64 from the heat exchanger 20, the heat of the electrical equipment 17 is dissipated to the cooling air 61, unlike the case where the electrical equipment 17 is cooled with the cooling air 61. It is possible to prevent the cooling efficiency of the inverter unit 6 from being lowered by the cooling air 61 due to the above.

[Modification]
It should be noted that the embodiments disclosed this time should be considered as examples and not restrictive in all respects. The scope of the present invention is indicated by the scope of the claims rather than the description of the above-described embodiments, and includes all modifications (modifications) within the meaning and scope equivalent to the scope of the claims.

For example, in the above embodiment, the heat exchanger 30 (first heat exchanger) is attached to the side surface 3 (first side surface), but the present invention is not limited to this. For example, the heat exchanger 30 (first heat exchanger) may be attached to the outer surface 10a (the side surface 2, the front surface 1, the rear surface 5, and the ceiling surface 4) other than the side surface 3.

Further, in the above-described embodiment, an example was shown in which the areas of the plurality of openings 130 (130a to 130b) provided in the partitioning member 13 were different from each other, but the present invention is not limited to this. For example, the areas of the plurality of openings 130 (130a to 130b) are made substantially equal, and the areas of the openings 6j provided in the upper surfaces 6i of the plurality of inverter units 6 (power converters) are made different from each other. good too.

Further, in the above-described embodiment, the cooling air 61 (first cooling air) circulates upward (Z1 direction) in the cooling air circulation area 6f (second cooling air circulation area). , the present invention is not limited to this. For example, the cooling air 61 (first cooling air) may flow downward (Z2 direction) in the cooling air circulation area 6f (second cooling air circulation area). Also, the cooling airflow area 6f (second cooling airflow area) may extend in the Y direction.

Further, in the above-described embodiment, an example in which the air intake duct 50 (outside air introduction portion) is attached to the rear surface 5 is shown, but the present invention is not limited to this. For example, the air intake duct 50 (external air introduction portion) may be attached to the outer surface 10a (the side surface 2, the side surface 3, the front surface 1, and the ceiling surface 4) other than the back surface 5.

Further, in the above-described embodiment, an example in which the inverter circuit 6d (semiconductor element portion) is provided inside the housing portion 10 was shown, but the present invention is not limited to this. A circuit (for example, a converter circuit) other than the inverter circuit 6d may be provided in the housing portion 10 .

Further, in the above-described embodiment, an example in which the IGBT element 6c (semiconductor element) is provided in the inverter circuit 6d (semiconductor element portion) in the housing portion 10 is shown, but the present invention is not limited to this. Inverter circuit 6d may be provided with an element (for example, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor)) other than IGBT element 6c.

Further, in the above embodiment, the reactor 15a and the heat radiating fins 6g are respectively cooled by the outside air (62a, 62b) introduced from the air intake duct 50 (outside air introduction section), but the present invention is directed to this. Not limited. For example, each of reactor 15a and radiation fins 6g may be cooled by cooling air 61 (first cooling air) cooled by heat exchanger 30 (first heat exchanger). Further, each of the electronic device 16a and the electric device 17 may also be cooled by the cooling air 61 (first cooling air).

Further, in the above-described embodiment, an example in which the electric device 17 is provided on the front surface 1 side of the housing unit 10 with respect to the plurality of inverter units 6 (power conversion units) has been shown, but the present invention is limited to this. No. For example, the electric device 17 may be provided on the back surface 5 side of the housing unit 10 with respect to the plurality of inverter units 6 (power converters).

Further, in the above embodiment, the heat exchanger 30 (first heat exchanger) is provided on the side surface 3 (first side surface), and the heat exchanger 21 (second heat exchanger) is provided on the side surface 2 (second side surface). , but the present invention is not limited to this. For example, heat exchanger 30 (first heat exchanger) is provided on side surface 2 (second side surface), and heat exchanger 21 (second heat exchanger) is provided on side surface 3 (first side surface). good.

Further, in the above embodiment, each of the heat exchanger 21 (second heat exchanger) and the heat exchanger 20 (third heat exchanger) is provided on the side surface 2 (second side surface). The present invention is not limited to this. For example, each of the heat exchanger 21 (second heat exchanger) and the heat exchanger 20 (third heat exchanger) has an outer surface 10a other than the side surface 2 (side surface 3, front surface 1, rear surface 5, and ceiling surface 4) may be attached.

Further, in the above-described embodiment, an example in which the housing section 10 is provided with the three heat exchangers (20, 21, and 30) is shown, but the present invention is not limited to this. For example, the housing 10 may be provided with four or more heat exchangers. Also, one or two heat exchangers may be provided in the housing section 10 .

Further, in the above-described embodiment, an example in which the housing section 10 is installed on the installation surface 100a on the lower side has been shown, but the present invention is not limited to this. For example, the housing section 10 may be installed on the side wall surface.

1 front 1a open/close door 2 side (second side)
3 side (first side)
5 Back 6 Inverter unit (power converter)
6c IGBT element (semiconductor element)
6d Inverter circuit (semiconductor element part)
6e Printed circuit board (electronic circuit board)
6f cooling air circulation area (second cooling air circulation area)
6g Radiation fin 6h Plate-like member (separation member)
REFERENCE SIGNS LIST 10 Housing 10a Outer surface 11 Inverter unit placement area (power converter placement area)
12 cooling air circulation area (first cooling air circulation area)
13 Partition member 15a Reactor 16a Electronic device 17 Electric device 20 Heat exchanger (third heat exchanger)
21 heat exchanger (second heat exchanger)
30 heat exchanger (first heat exchanger)
50 intake duct (external air introduction part)
52a duct (first duct part)
52b duct (second duct part)
60 outside air (outside air that exchanges heat with the first cooling air)
61 cooling air (first cooling air)
62a outside air (first outside air)
62b outside air (second outside air)
63 cooling air (second cooling air)
64 cooling air (third cooling air)
100 power conditioner (power converter)
100a installation surface 130, 130a, 130b, 130c opening L1 length (the length of the power converter in the horizontal direction)
L2 length (vertical length of the power converter)
X direction (horizontal direction)
Z direction (vertical direction)

Claims (13)

A housing part installed on the installation surface,
Viewed from the front side of the housing section where the opening/closing door is provided, they are arranged in a row in the left-right direction along the installation surface, have a substantially rectangular parallelepiped shape, and have a length in the left-right direction. a plurality of power conversion units housed in the housing unit so as to be shorter than the length in the vertical direction orthogonal to the installation surface;
The plurality of power converters mounted on the outer surface of the housing unit cools the first cooling air by exchanging heat between the first cooling air for cooling each of the plurality of power converters and outside air. and a first heat exchanger common to the power converter. the outer surface of the housing portion includes a first side surface and a second side surface of the housing portion provided on both sides in the left-right direction with respect to the front surface of the housing portion;
2. The power converter of claim 1, wherein said first heat exchanger is attached to one of said first side and said second side. A first cooling air flow area in which the first cooling air cooled by the first heat exchanger flows along the left-right direction, and the plurality of power converters are arranged inside the housing. further comprising a partitioning member that partitions the power conversion unit arrangement area in which the
3. The power converter according to claim 1, wherein said partitioning member includes a plurality of openings provided between said first cooling air circulation region and each of said plurality of power converters. 4. The power converter according to claim 3, wherein the areas of said plurality of openings are configured to differ from each other according to the wind speed of said first cooling air flowing in said first cooling air circulation region. . Each of the plurality of power conversion units includes a semiconductor element portion provided with a semiconductor element, and a semiconductor element portion extending in the vertical direction along the semiconductor element portion. 5. The power conversion device according to claim 3, further comprising a second cooling air circulation area. further comprising an outside air introduction section provided on the outer surface of the housing for introducing a first outside air into the housing;
each of the plurality of power conversion units includes a semiconductor element unit provided with a semiconductor element, and a heat radiation fin for radiating heat from the semiconductor element unit;
The semiconductor element portion is cooled by the first cooling air cooled by the first heat exchanger,
The power conversion device according to any one of claims 1 to 5, wherein the heat radiation fins are cooled by the first outside air introduced into the housing from the outside air introduction section. each of the plurality of power conversion units further includes an electronic substrate that transmits an electrical signal to the semiconductor element of the semiconductor element unit;
Further comprising a reactor connected to each of the plurality of power conversion units,
The electronic substrate of each of the plurality of power conversion units is cooled by the first cooling air cooled by the first heat exchanger,
7. The power converter according to claim 6, wherein said reactor is cooled by second outside air introduced into said housing from said outside air introduction portion. The housing portion is provided with a first duct portion through which the first outside air flows, and a second duct portion through which the second outside air flows and which is provided separately from the first duct portion. 8. The power conversion device according to claim 7. The power conversion device according to claim 8, wherein said reactor is housed in said housing section while being isolated from said power conversion section. 10. The apparatus according to any one of claims 6 to 9, wherein in each of said plurality of power converters, said heat radiating fins and said semiconductor element portion are arranged adjacent to each other along said left-right direction. Power converter. The power converter according to any one of claims 6 to 10, further comprising an isolation member provided between the semiconductor element portion and the heat radiation fins and isolating the first outside air and the first cooling air. Device. the outer surface of the housing portion includes a first side surface and a second side surface of the housing portion provided on both sides in the left-right direction with respect to the front surface of the housing portion;
The first heat exchanger is attached to the first side,
A second cooling air that is attached to the second side surface, is provided on the second side surface side with respect to the plurality of power conversion units in the housing unit, and cools electronic devices connected to the plurality of power conversion units. The power converter according to any one of claims 1 to 11, further comprising a second heat exchanger that cools the second cooling air by exchanging heat with the outside air. attached to the outer surface of the housing, provided in the housing on the front side or the rear side of the housing with respect to the plurality of power converters, and connected to each of the plurality of power converters 13. The apparatus according to any one of claims 1 to 12, further comprising a third heat exchanger that cools the third cooling air by exchanging heat between the third cooling air that cools the electrical equipment to be cooled and outside air. power converter.

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