JP7071804B2 - Power converter - Google Patents

Description

The present invention relates to a power conversion device, and more particularly to a power conversion device including a cooling fan.

Conventionally, a power conversion device including a cooling fan is known (see, for example, Patent Document 1).

The above-mentioned Patent Document 1 discloses an inverter device including a cooling fan. This inverter device includes an inverter main body, a cooling fan, and a mounting member for attaching the cooling fan to the inverter main body. The mounting member is configured to cover the front and sides of the cooling fan. Then, the cooling fan held by the mounting member is inserted into the inside of the inverter body through the opening of the inverter body. As a result, the holding portion having the snap-fit structure of the mounting member engages with the groove hole of the inverter body, so that the cooling fan held by the mounting member is mounted on the inverter body.

Here, in general, the cooling fan is provided with a lead wire for supplying electric power to the cooling fan. Then, a power supply line for supplying power from the inverter main body is connected to the lead wire. Further, the lead wire and the power supply line are electrically connected by connecting the connector portion attached to the tip of the lead wire and the connector portion attached to the tip of the power supply line. Then, in a state where the connector portion of the lead wire and the connector portion of the power supply line are connected in advance, the cooling fan held by the mounting member is mounted on the inverter main body.

Japanese Unexamined Patent Publication No. 2015-146680

However, in the conventional inverter device as described in Patent Document 1, when the lead wire connector portion and the power supply wire connector portion are connected and the lead wire and the power supply line are relatively long, the lead wire and the power supply line are relatively long. After the cooling fan is attached to the inverter main body (power conversion device main body), there is a problem that the lead wire and the power supply wire may bend and the lead wire may come into contact with the blade portion of the cooling fan.

The present invention has been made to solve the above-mentioned problems, and one object of the present invention is that after the cooling fan is attached to the main body of the power conversion device, the lead wire is attached to the blade portion of the cooling fan. It is an object of the present invention to provide a power conversion device capable of suppressing contact with a power source.

In order to achieve the above object, the power conversion device according to one aspect of the present invention is attached to and cooled by a power conversion device main body, a cooling fan arranged in a storage portion of the power conversion device main body, and a cooling fan. It is attached to the mounting member including the mounting part for mounting the fan to the storage part of the power conversion device main body, and to the end of the mounting member, and is located behind the cooling fan in the storage part of the power conversion device main body. The protective member, which is arranged so as to extend and is provided with a protective member for protecting the lead wire of the cooling fan from the blade portion of the cooling fan, and which is arranged so as to extend to the back side of the cooling fan, has a skeleton shape. However, there are multiple ventilation holes between the skeletons .

As described above, the power conversion device according to one aspect of the present invention includes a protective member attached to the mounting member to protect the lead wire of the cooling fan from the blade portion of the cooling fan. As a result, after the cooling fan is attached to the main body of the power converter, the protective member protects the lead wire from the blade portion of the cooling fan, thereby suppressing the lead wire from coming into contact with the blade portion of the cooling fan. be able to. As a result, the quality (cooling performance) of the power conversion device deteriorates (the quality varies depending on the device) due to the lead wire being cut by the cooling fan or the lead wire getting caught in the cooling fan. Can be prevented.

Further, since the lead wire of the cooling fan is protected from the cooling fan by the protective member, it is possible to prevent the lead wire from being caught in the blade portion of the cooling fan when the cooling fan is attached to the main body of the power conversion device. Can be done. This makes it possible to improve the mounting workability of the cooling fan.
Further, the protective member can be suppressed by the ventilation hole from obstructing the wind blown by the cooling fan. Further, the weight of the protective member can be reduced as compared with the case where the protective member is not provided with the ventilation hole.

In the power conversion device according to the above one aspect, preferably, the protective member is provided with a fixing portion for fixing the connector portion of the lead wire of the cooling fan. With this configuration, the connector portion of the lead wire is fixed to the protective member, so that when the cooling fan is attached to the main body of the power converter, the lead wire is prevented from protruding from the storage portion of the main body of the power converter. At the same time, it is possible to further suppress the lead wire from getting caught in the blade portion of the cooling fan. As a result, it is not necessary for the operator to carefully install the cooling fan so as to prevent the lead wire from sticking out and being caught, so that the workability of the cooling fan installation work can be improved. Further, when the lead wire is not fixed, it is necessary for the operator to attach the cooling fan to the main body of the power conversion device while the operator grips (supports) the lead wire. The number of processes increases by the amount of work) (it takes time and effort). Further, when the lead wire is sandwiched in the gap between the main body of the power conversion device and the cooling fan (mounting member), a step (work) of removing the sandwiched lead wire is required. Therefore, in the present invention, by fixing the lead wire to the protective member, it is possible to suppress an increase in the number of steps (labor). As a result, the installation time of the cooling fan can be shortened.

In this case, preferably, the connector portion is provided with a first engaging portion, and the fixed portion is provided with a second engaging portion with which the first engaging portion of the connector portion is engaged. With this configuration, the connector portion can be easily fixed (engaged) to the fixed portion.

In a power conversion device in which the first engaging portion is provided in the connector portion, preferably, in the vicinity of the second engaging portion of the fixed portion, the connector portion fixed to the fixed portion is engaged and the fixed portion is used. An engagement portion for preventing the connector portion from falling off is provided to prevent the connector portion from falling off. With this configuration, the connector portion once fixed to the fixed portion can be prevented from falling off from the fixed portion by the dropout prevention engaging portion, so that the connector portion (lead wire) will fall off. It is possible to suppress the resulting deterioration in workability.

In this case, preferably, the first engaging portion of the connector portion includes the first convex portion, and the second engaging portion of the fixing portion is a groove portion that is engaged by the sliding movement of the first convex portion. include. With this configuration, the first convex portion can be easily engaged with the groove portion simply by sliding the first convex portion.

In a power conversion device in which a fixing portion is provided on the protective member, the protective member is preferably provided with a first recess for winding a lead wire around the protective member. With this configuration, the lead wire is wound around the first recess of the protective member, so that when the cooling fan is attached to the main body of the power conversion device, the lead wire protrudes from the storage portion of the main body of the power conversion device. , It is possible to further suppress the lead wire from getting caught in the blade portion of the cooling fan.

In a power conversion device in which a fixed portion is provided on the protective member, preferably, a second recess for hooking a power supply line for supplying power to a cooling fan to the protective member is provided at the tip end portion of the protective member. ing. With this configuration, when the cooling fan is attached to the storage portion of the main body of the power conversion device, the power supply line is hooked on the second recess of the protective member, so that the power supply line is connected to the storage portion of the main body of the power conversion device. It is possible to suppress the protrusion.

In a power conversion device in which a fixing portion is provided on the protective member, the protective member preferably follows the inner surface of the storage portion in a state where the cooling fan is attached to the storage portion of the power conversion device main body by the mounting member. As described above, the fixing portion is provided on the mounting member, and the fixing portion is provided on the inner surface side of the storage portion of the protective member. With this configuration, the connector portion of the lead wire portion is arranged on the side opposite to the cooling fan of the protective member, so that the power supply line connected to the connector portion of the lead wire portion is bitten by the cooling fan. Can be suppressed.

In the power conversion device according to the above one aspect, preferably, a plurality of cooling fans are provided, a plurality of protective members are provided so as to correspond to each of the plurality of cooling fans, and the plurality of protective members are mounted by the cooling fan. It is provided along the inner surface of the storage portion in a state of being attached to the storage portion of the main body of the power conversion device by a member. With this configuration, unlike the case where the protective member is arranged in the central portion of the storage portion, it is possible to suppress the protective member from interfering with the wind blown by the cooling fan.

According to the present invention, as described above, it is possible to prevent the lead wire from coming into contact with the blade portion of the cooling fan after the cooling fan is attached to the main body portion of the power conversion device.

It is a perspective view of the power conversion apparatus by one Embodiment. It is a perspective view (state before mounting a cooling fan) of the power conversion apparatus by one Embodiment. It is a top view of the power conversion apparatus according to one embodiment. It is a figure which shows the state before the cooling fan is attached to the attachment member. It is a front view of a protective member. FIG. 5 is a cross-sectional view taken along the line 200-200 of FIG. It is a perspective view of a connector part. It is a figure which shows the state which the cooling fan is attached to the attachment member. It is a figure (1) which shows the state which the lead wire is wound around a protective member. It is a figure (2) which shows the state which the lead wire is wound around a protective member. It is a figure which shows the state which fixes the connector part to a fixed part. It is a figure which shows the state which the connector part is fixed to a fixed part. It is a figure which shows the state before inserting a cooling fan into a storage part. It is a figure which shows the state which the cooling fan is inserted in the storage part. It is a perspective view of the power conversion apparatus by the modification of one Embodiment.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

The configuration of the power conversion device 1 according to the present embodiment will be described with reference to FIGS. 1 to 14. The power conversion device 1 includes, for example, an inverter device that converts an input AC power into a set AC power and outputs the power. Further, FIGS. 1 to 3 show a state in which a part of the upper housing 13 is removed.

(Overall configuration of power converter)
As shown in FIG. 1, the power conversion device 1 includes a power conversion device main body 10. Inside the power conversion device main body 10, a power conversion circuit 11 (see FIG. 2) including a power conversion element (not shown), a cooling unit 12 for cooling the power conversion circuit 11, and the like are housed. Specifically, the power conversion circuit 11 is arranged inside the upper housing 13 of the power conversion device main body 10. Further, the cooling unit 12 is arranged inside the lower housing 14 of the power conversion device main body 10.

Further, as shown in FIG. 2, the power conversion device 1 includes a cooling fan 20 arranged in the storage unit 15 of the power conversion device main body 10. The cooling fan 20 is configured to dissipate heat generated from the power conversion circuit 11 by ventilating the cooling unit 12. Further, a plurality of cooling fans 20 (two in this embodiment) are provided. The two cooling fans 20 are arranged in the lower housing 14 (storage unit 15) so as to be adjacent to each other in the X direction. Further, the two cooling fans 20 and the cooling unit 12 are arranged so as to be adjacent to each other in the Y direction.

Further, as shown in FIG. 4, the cooling fan 20 is provided with a lead wire 21 for supplying electric power to the cooling fan 20. Further, a connector portion 22 is provided at the tip of the lead wire 21. The connector portion 22 is configured to be connected to the connector portion 17 (see FIG. 2) of the power supply line 16 (see FIG. 3) extending from the power conversion device main body portion 10. In addition, in FIG. 4 and FIGS. 8 to 10, the connector portion 22 is shown in a simplified manner.

Further, as shown in FIG. 7, the connector portion 22 is gripped by forming a prismatic main body portion 22a to which the connector portion 17 of the power supply line 16 is connected and a non-slip knurl that is manually gripped by the operator. It has a portion 22b. Further, in the present embodiment, the connector portion 22 is provided with a pair of convex portions 22c. The pair of convex portions 22c are provided on both sides of the main body portion 22a (see FIG. 12). The convex portion 22c is an example of the "first convex portion" and the "first engaging portion" in the claims.

Further, as shown in FIG. 2, the power conversion device 1 includes a mounting member 30 for mounting the cooling fan 20 to the storage portion 15 of the power conversion device main body 10. The mounting member 30 is made of, for example, resin. Further, the mounting member 30 has a flat plate shape. Further, the mounting member 30 is provided with a ventilation hole 31.

Further, as shown in FIG. 4, the mounting member 30 is provided with a plurality of convex portions 32. Further, the mounting member 30 is provided with a plurality of claw portions 33. Then, the hole 20b of the cooling fan 20 is inserted into the convex portion 32 of the mounting member 30, and the claw portion 33 engages with the surface 20a of the cooling fan 20, so that the cooling fan 20 is fixed to the mounting member 30. Will be done.

Further, the mounting member 30 is provided with a claw portion 34 so as to intersect the flat plate-shaped portion in which the ventilation hole 31 is provided. Then, the cooling fan 20 is fixed to the storage portion 15 (see FIG. 14) by engaging the claw portion 34 with the engaging portion (not shown) of the storage portion 15.

Here, in the present embodiment, the power conversion device 1 includes a protective member 40 for protecting the lead wire 21 of the cooling fan 20 from the blade portion 20c of the cooling fan 20. The protective member 40 is attached to the attachment member 30. As shown in FIG. 5, the protective member 40 is provided with a pair of claw portions 41. Then, the protective member 40 is attached to the attachment member 30 by engaging the claw portion 41 with the attachment member 30. Further, the protective member 40 is formed of, for example, a resin or the like.

Further, in the present embodiment, as shown in FIG. 2, in the protective member 40, the inner surface 15a of the storage portion 15 is provided in a state where the cooling fan 20 is attached to the storage portion 15 of the power conversion device main body portion 10 by the mounting member 30. It is provided in the mounting member 30 so as to be in line with. Further, a plurality of protective members 40 (two in the present embodiment) are provided so as to correspond to each of the plurality of (two in the present embodiment) cooling fans 20. The two protective members 40 (protective members 40a and 40b) are provided at one end and the other end of the mounting member 30 in the X direction. The two protective members 40a and 40b are provided along the inner surface 15a of the storage unit 15 in a state where the cooling fan 20 is attached to the storage unit 15 of the power conversion device main body 10 by the mounting member 30. .. Specifically, the protective member 40a is provided along the inner side surface 18a of the storage portion 15, and the protective member 40b is provided along the inner side surface 18b of the storage portion 15.

Further, in the present embodiment, as shown in FIG. 2, the protective member 40 is provided with a fixing portion 42 for fixing the connector portion 22 of the lead wire 21 of the cooling fan 20. Further, the fixing portion 42 is provided on the inner surface 15a side of the storage portion 15 of the protective member 40. That is, the fixing portion 42 is provided on the side opposite to the cooling fan 20 side of the protective member 40. As a result, the connector portion 22 fixed to the fixed portion 42 and the cooling fan 20 are partitioned by the protective member 40.

Further, in the present embodiment, as shown in FIG. 6, the fixing portion 42 is provided with a groove portion 43 with which the convex portion 22c of the connector portion 22 is engaged. A pair of groove portions 43 are provided so as to correspond to the pair of convex portions 22c. Then, the convex portion 22c of the connector portion 22 is slidably moved to engage with the groove portion 43. As a result, the connector portion 22 is fixed to the fixing portion 42. The groove portion 43 is an example of the “second engaging portion” in the claims.

Further, in the present embodiment, in the vicinity of the groove portion 43 of the fixing portion 42, the connector portion 22 is engaged with the connector portion 22 fixed to the fixing portion 42 to prevent the connector portion 22 from falling off from the fixing portion 42. The convex portion 44 is provided. Specifically, the convex portion 44 is formed so as to project in the vicinity of the groove portion 43 in a direction substantially orthogonal to the A direction in which the groove portion 43 extends. Further, the convex portion 44 is provided only in the vicinity of one side (groove portion 43b) of the pair of groove portions 43. Further, the entrance portion 45 on the side where the connector portion 22 is inserted, in the vicinity of the groove portion 43a on the other side where the convex portion 44 of the pair of groove portions 43 is not provided, intersects in the direction in which the groove portion 43 extends (direction A). It is formed so as to be inclined along the B direction. The groove portions 43a and 43b are examples of the "second engaging portion" in the claims. Further, the convex portion 44 is an example of the “engagement portion for preventing falling off” within the scope of the claims.

Then, after the connector portion 22 is inserted into the groove portion 43 along the B direction so as to intersect the groove portion 43, the connector portion 22 is inserted along the A direction in which the groove portion 43 extends. After that, the convex portion 44 engages with the back surface side (opposite the insertion direction) of the prismatic main body portion 22a of the connector portion 22 (see FIG. 12). This makes it possible to prevent the connector portion 22 from falling off from the fixed portion 42 after being fixed to the fixed portion 42.

Further, in the present embodiment, as shown in FIG. 5, the protective member 40 is provided with a recess 46 for winding the lead wire 21 around the protective member 40. The connector portion 22 is fixed to the fixing portion 42 in a state where the lead wire 21 is wound around the recess 46 of the protective member 40 (see FIG. 12). Specifically, the recess 46 is provided on the root side (the side closer to the mounting member 30) of the protective member 40. Further, the recesses 46 are provided on both side surfaces of the protective member 40 (recesses 46a, recesses 46b), respectively. Further, the recess 46 is formed so as to be recessed toward the center side of the protective member 40. Further, the recess 46 has a substantially V-shape. Further, the recess 46b is larger than the recess 46a. The recesses 46, 46a and 46b are examples of the "first recess" in the claims.

Further, in the present embodiment, the cooling fan 20 is attached to the storage portion 15 of the power conversion device main body 10 at the tip end portion of the protective member 40 (the end portion on the Y direction side into which the cooling fan 20 is inserted into the storage portion 15). At that time, a recess 47 is provided for hooking the power supply line 16 for supplying electric power to the cooling fan 20 to the protective member 40. Specifically, the tip of the protective member 40 is provided with a pair of convex portions 48 protruding toward the Y direction for inserting the cooling fan 20 into the storage portion 15, and between the pair of convex portions 48. A recess 47 is formed in the recess 47. Then, the power supply line 16 is hooked between the pair of convex portions 48 (see FIG. 14). Further, the concave portion 47 has a substantially U-shape, and the convex portion 48 has a substantially trapezoidal shape. The recess 47 is an example of the "second recess" in the claims.

Further, in the present embodiment, the protective member 40 is provided with a ventilation hole 49 for ventilating the air blown by the cooling fan 20. Specifically, the protective member 40 has a skeleton shape, and a plurality of ventilation holes 49 are provided between the skeletons. Further, the protective member 40 is reduced in weight by providing the ventilation hole 49.

Next, a method of mounting the cooling fan 20 will be described with reference to FIGS. 8 to 14.

As shown in FIG. 8, two cooling fans 20 are attached to the attachment member 30.

Next, as shown in FIGS. 9 and 10, the lead wire 21 of the cooling fan 20 is formed in the recess 46 of the protective member 40 from the outside (the side opposite to the cooling fan 20 side) of the protective member 40 toward the inside. Wrapped around.

Then, as shown in FIG. 11, the connector portion 22 slides from the entrance portion 45 to the groove portion 43 so as to intersect the A direction (see FIG. 6) in which the groove portion 43 extends (see FIG. 6). Will be done. Then, as shown in FIG. 12, when the connector portion 22 reaches the end portion of the fixing portion 42 on the A direction side, the convex portion 44 engages with the back surface side of the main body portion 22a of the connector portion 22. As a result, the connector portion 22 is fixed to the fixing portion 42.

Next, as shown in FIG. 13, the connector portion 17 of the power supply line 16 extending from the power conversion device main body portion 10 is connected to the connector portion 22 in a state of being fixed to the fixed portion 42. The operations up to this point are similarly performed on both the protective member 40a and the protective member 40b.

Next, as shown in FIG. 14, the cooling fan 20 is inserted into the storage portion 15 of the power conversion device main body 10 with the connector portion 17 of the power supply line 16 connected to the connector portion 22 of the cooling fan 20. Will be done. At this time, the cooling fan 20 is inserted into the storage portion 15 with the power supply line 16 hooked in the recess 47 of the protective member 40. As a result, the power supply line 16 is prevented from protruding from the storage unit 15, so that it is not necessary for the operator to return the power supply line 16 that protrudes into the storage unit 15.

Finally, the cooling fan 20 is attached to the storage portion 15 by engaging the claw portion 34 of the mounting member 30 with the engaging portion (not shown) of the storage portion 15.

(Effect of this embodiment)
In this embodiment, the following effects can be obtained.

In the present embodiment, as described above, the protective member 40 attached to the mounting member 30 and for protecting the lead wire 21 of the cooling fan 20 from the blade portion 20c of the cooling fan 20 is provided. As a result, after the cooling fan 20 is attached to the power conversion device main body 10, the protection member 40 protects the lead wire 21 from the blade portion 20c of the cooling fan 20, so that the lead wire 21 is the blade of the cooling fan 20. It is possible to suppress contact with the portion 20c. As a result, the quality (cooling performance) of the power conversion device 1 deteriorates due to the lead wire 21 being cut by the cooling fan 20 or the lead wire 21 being caught in the cooling fan 20 (quality depending on the device). Can be prevented from fluctuating).

Further, since the lead wire 21 of the cooling fan 20 is protected from the cooling fan 20 by the protective member 40, when the cooling fan 20 is attached to the power conversion device main body 10, the lead wire 21 is the blade portion 20c of the cooling fan 20. It is possible to suppress being bitten by. This makes it possible to improve the mounting workability of the cooling fan 20.

Further, in the present embodiment, as described above, the protective member 40 is provided with a fixing portion 42 for fixing the connector portion 22 of the lead wire 21 of the cooling fan 20. As a result, the connector portion 22 of the lead wire 21 is fixed to the protective member 40. Therefore, when the cooling fan 20 is attached to the power conversion device main body portion 10, the lead wire 21 is transferred from the storage portion 15 of the power conversion device main body portion 10. It is possible to suppress the protrusion and further suppress the lead wire 21 from getting caught in the blade portion 20c of the cooling fan 20. As a result, it is not necessary for the operator to carefully perform the mounting work of the cooling fan 20 so as to prevent the lead wire 21 from sticking out and biting, so that the workability of the mounting work of the cooling fan 20 can be improved. Further, when the lead wire 21 is not fixed, the operator needs to attach the cooling fan 20 to the power conversion device main body 10 while the operator holds (supports) the lead wire 21, so that the operator can attach the lead wire 21. The number of steps increases (it takes time and effort) by the amount of the step (work) of gripping. Further, when the lead wire 21 is sandwiched in the gap between the power conversion device main body 10 and the cooling fan 20 (mounting member 30), a step (work) of removing the sandwiched lead wire 21 is required. Therefore, in the present embodiment, by fixing the lead wire 21 to the protective member 40, it is possible to suppress an increase in the number of steps (labor). As a result, the installation time of the cooling fan 20 can be shortened.

Further, in the present embodiment, as described above, the connector portion 22 is provided with the convex portion 22c, and the fixing portion 42 is provided with the groove portion 43 with which the convex portion 22c of the connector portion 22 is engaged. As a result, the connector portion 22 can be easily fixed (engaged) with the fixing portion 42.

Further, in the present embodiment, as described above, in the vicinity of the groove portion 43 of the fixing portion 42, the connector portion 22 engages with the connector portion 22 fixed to the fixing portion 42, and the connector portion 22 falls off from the fixing portion 42. A convex portion 44 is provided to prevent the above. As a result, the connector portion 22 once fixed to the fixed portion 42 can be prevented from falling off from the fixed portion 42 by the convex portion 44, which is caused by the connector portion 22 (lead wire 21) falling off. It is possible to suppress a decrease in workability.

Further, in the present embodiment, as described above, the fixing portion 42 includes the groove portion 43 which is engaged by the convex portion 22c being slid and moved. As a result, the convex portion 22c can be easily engaged with the groove portion 43 simply by sliding the convex portion 22c.

Further, in the present embodiment, as described above, the protective member 40 is provided with a recess 46 for winding the lead wire 21 around the protective member 40. As a result, the lead wire 21 is wound around the recess 46 of the protective member 40, so that when the cooling fan 20 is attached to the power conversion device main body 10, the lead wire 21 protrudes from the storage portion 15 of the power conversion device main body 10. , And it is possible to further suppress the lead wire 21 from getting caught in the blade portion 20c of the cooling fan 20.

Further, in the present embodiment, as described above, the tip portion of the protective member 40 is provided with a recess 47 for hooking the power supply line 16 for supplying electric power to the cooling fan 20 to the protective member 40. As a result, when the cooling fan 20 is attached to the storage portion 15 of the power conversion device main body 10, the power supply line 16 is hooked on the recess 47 of the protective member 40, so that the power supply line 16 stores the power conversion device main body 10. It is possible to suppress the protrusion from the portion 15.

Further, in the present embodiment, as described above, the protective member 40 is along the inner surface 15a of the storage portion 15 in a state where the cooling fan 20 is attached to the storage portion 15 of the power conversion device main body portion 10 by the mounting member 30. The fixing portion 42 is provided on the mounting member 30 as described above, and the fixing portion 42 is provided on the inner surface 15a side of the storage portion 15 of the protective member 40. As a result, the connector portion 22 of the lead wire 21 is arranged on the side opposite to the cooling fan 20 of the protective member 40, so that the power supply line 16 connected to the connector portion 22 of the lead wire 21 bites the cooling fan 20. It can be suppressed from being caught.

Further, in the present embodiment, as described above, in the plurality of protective members 40, the cooling fan 20 is attached to the storage portion 15 of the power conversion device main body 10 by the mounting member 30, and the inner surface 15a of the storage portion 15a is attached. It is provided along the line. As a result, unlike the case where the protective member 40 is arranged in the central portion of the storage portion 15, it is possible to prevent the protective member 40 from interfering with the wind blown by the cooling fan 20.

Further, in the present embodiment, as described above, the protective member 40 is provided with a ventilation hole 49. As a result, the protective member 40 can be suppressed by the ventilation hole 49 from obstructing the wind blown by the cooling fan 20. Further, the weight of the protective member 40 can be reduced as compared with the case where the protective member 40 is not provided with the ventilation hole 49.

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

For example, in the above embodiment, an example in which the fixing portion 42 is provided on the protective member 40 has been shown, but the present invention is not limited to this. For example, the protective member 40 may not be provided with the fixing portion 42.

Further, in the above embodiment, an example in which the connector portion 22 is provided with the convex portion 22c and the fixing portion 42 is provided with the groove portion 43 has been shown, but the present invention is not limited to this. For example, the connector portion 22 may be provided with a groove portion, and the fixing portion 42 may be provided with a convex portion.

Further, in the above embodiment, an example of fixing the connector portion 22 to the fixing portion 42 by engaging the convex portion 22c and the groove portion 43 has been shown, but the present invention is not limited to this. For example, the connector portion 22 may be fixed to the fixing portion 42 by a configuration other than the convex portion 22c and the groove portion 43.

Further, in the above embodiment, an example in which the fixing portion 42 is provided with the convex portion 44 for preventing falling off is shown, but the present invention is not limited to this. For example, the fixing portion may be provided with a concave portion for preventing falling off, and the connector portion may be provided with a convex portion that engages with the concave portion.

Further, in the above embodiment, an example in which two cooling fans 20 are provided has been shown, but the present invention is not limited to this. For example, two or more (for example, three) cooling fans 20 may be provided as in the power conversion device 100 according to the modification shown in FIG. In this case, three protective members 140 are provided so as to correspond to the number of cooling fans 20. The three protective members 140a, 140b and 140c are provided along the inner surface 15a of the storage portion 15, respectively. Specifically, the protective members 140a and 140b are provided along the inner side surfaces 18a and 18b of the accommodating portion 15, respectively. Further, the protective member 140c is provided along the inner low surface 18c (or the inner upper surface 18d) of the storage portion 15.

Further, in the above embodiment, an example in which the mounting member 30 and the protective member 40 are provided as separate bodies has been shown, but the present invention is not limited to this. For example, the mounting member 30 and the protective member 40 may be integrally formed.

1,100 Power converter 10 Power converter body 15 Storage 15a Inner surface 16 Power supply line 20 Cooling fan 20c Blade 21 Lead wire 22 Connector part 22c Convex part (1st convex part, 1st engaging part)
30 Mounting member 40, 40a, 40b, 140, 140a, 140b, 140c Protective member 42 Fixing part 43, 43a, 43b Groove part (second engaging part)
44 Convex part (engagement part to prevent falling off)
46, 46a, 46b recess (first recess)
47 recess (second recess)
49 Ventilation hole

Claims (9)

The main body of the power converter and
A cooling fan arranged in the storage portion of the main body of the power converter and
A mounting member that is mounted on the cooling fan and includes a mounting portion for mounting the cooling fan on the storage portion of the power conversion device main body.
It is attached to the end of the mounting member and is arranged so as to extend to the back side of the cooling fan in the storage portion of the power conversion device main body, and the lead wire of the cooling fan is connected to the blade of the cooling fan. Equipped with a protective member to protect from the part ,
The protective member arranged so as to extend to the back side of the cooling fan is a power conversion device having a skeleton shape and having a plurality of ventilation holes between the skeletons . The power conversion device according to claim 1, wherein the protective member is provided with a fixing portion for fixing a connector portion of the lead wire of the cooling fan. The connector portion is provided with a first engaging portion, and the connector portion is provided with a first engaging portion.
The power conversion device according to claim 2, wherein the fixed portion is provided with a second engaging portion with which the first engaging portion of the connector portion is engaged. In the vicinity of the second engaging portion of the fixed portion, the connector portion is engaged with the connector portion fixed to the fixed portion to prevent the connector portion from falling off from the fixed portion. The power conversion device according to claim 3, wherein an engaging portion is provided. The first engaging portion of the connector portion includes a first convex portion.
The power conversion device according to claim 3 or 4, wherein the second engaging portion of the fixing portion includes a groove portion that is engaged by sliding the first convex portion. The power conversion device according to any one of claims 2 to 5, wherein the protective member is provided with a first recess for winding the lead wire around the protective member. The second aspect of claim 2 to 6, wherein a second recess for hooking a power supply line for supplying electric power to the cooling fan to the protective member is provided at the tip of the protective member. Power converter. The protective member is provided on the mounting member so as to be along the inner surface of the housing portion in a state where the cooling fan is attached to the storage portion of the power conversion device main body portion by the mounting member.
The power conversion device according to any one of claims 2 to 7, wherein the fixing portion is provided on the inner surface side of the storage portion of the protective member. A plurality of the cooling fans are provided, and the cooling fan is provided.
A plurality of the protective members are provided so as to correspond to each of the plurality of cooling fans.
The plurality of protective members are provided so as to be along the inner surface of the storage portion in a state where the cooling fan is attached to the storage portion of the power conversion device main body portion by the mounting member. 8. The power conversion device according to any one of 8.

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