JP5661055B2 - Control device - Google Patents

Description

  The present invention relates to a control device equipped with an inverter equipped in a packaged air conditioner or the like, and particularly relates to a configuration in which heat generated by the control device is radiated by a fan.

Conventionally, as an induction heating cooker that enhances the cooling efficiency of electronic control components such as power semiconductor elements and capacitors, it has a cooling fan that cools the electronic control board on which the electronic control components are arranged below the induction heating coil. A technique is disclosed in which an electronic control component that generates a large amount of heat is disposed in an oblique direction toward the front of the cooling fan farther from the cooling air outlet (for example, Patent Document 1).
In addition, as a heat sink cooling device for power electronics devices equipped with power semiconductor elements, another straight fin (louver) is installed upstream of one end of the plurality of pin fins, approximately perpendicular to the height direction of the pin fins. As a result, the air from the air inlet flows along between the louvers, flows obliquely into the pin fins toward the heat generating element, and creates a vortex on the downstream side of the pin fin, while near the heat generating element. The technique which collides with the fin base of this and improves a cooling capability is shown (for example, patent document 2).

JP 2008-311092 A JP 2007-221153 A

However, the technique disclosed in Patent Document 1 is a configuration in which the cooling fan is simply arranged in an oblique direction with respect to the heat sink. In this configuration, a sudden open space immediately after the cooling fan is widened, resulting in a large pressure loss and a flow velocity. Cannot be obtained so much, and an effect like collision cooling cannot be obtained. Also, even if an effect such as collision cooling is obtained by increasing the flow velocity, the part that generates the greatest amount of heat is placed in a part far from the cooling fan, so the part where collision cooling occurs most effectively cannot be used effectively. There is a problem.
Further, in Patent Document 2, the louver is arranged so that air is supplied obliquely immediately before the heat sink. However, pressure loss occurs in the louver, or clogging occurs when used for a long time, and efficient heat dissipation cannot be performed. There is a problem. Furthermore, the heat sink occupies most of the size of the housing, but if the heat sink is installed in the horizontal direction as in Patent Document 2, the installation area cannot be reduced. Assuming that the casing of Patent Document 2 is in the vertical direction, the fan is directly above and recently installed in a basement or a high-temperature, high-humidity building even if it is indoors due to the diversification of uses of control devices equipped with inverters. As the number of cases increases, the drip-proof effect is impaired for the needs of the control device having the drip-proof structure, and there is a problem that it is not applicable.

  The present invention has been made to solve the technical problems shown in Patent Documents 1 and 2 as described above, and is small in size, can efficiently dissipate heat generated by electronic control components, and has a drip-proof effect. It is an object to provide a control device.

A control device according to the present invention includes a substantially rectangular parallelepiped housing that houses a first electronic control component, a second electronic control component, and a heat sink, and the housing includes a bottom plate and a top plate facing the bottom plate. The first side plate and the second side plate that connect the plate, the bottom plate, and the top plate to each other, and the bottom plate, the top plate, the first and second side plates, respectively, and the fan mounting provided on one end side A plate and an exhaust port plate provided on the other end facing the fan mounting plate,
The first electronic control component is disposed on the bottom plate, the first partition plate provided on the upper portion of the first electronic control component, and the heat sink in contact with the first partition plate in parallel with the bottom plate. And a second electronic control component is attached to the heat sink, and a second partition plate is provided on the heat sink, and the second partition plate is provided between the bottom plate and the first partition plate. A first air passage forms a second air passage between the first partition plate and the second partition plate, and a third air passage forms between the second partition plate and the top plate. In addition, a wind guide plate is provided on the fan mounting plate side of the first partition plate and the second partition plate,
Cooling air blown from a fan attached to the fan attachment plate and installed at a predetermined attachment angle with respect to the bottom plate passes through the first, second, and third air passages via the air guide plate, and the first electrons. The control component, the second electronic control component, and the heat sink are cooled and exhausted out of the casing through a plurality of louvers provided on the exhaust port plate.

  Since the control device according to the present invention employs the above-described configuration, the fan can be downsized by installing the fan at a predetermined angle with respect to the heat sink, and the cooling air blown out by the fan can be reduced. Increases the speed by the wind guide plate, increases the heat dissipation effect of the heat sink due to the collision effect, efficiently dissipates the first and second electronic control parts in parallel, and exhausts by the louver, so it exhibits a drip-proof effect There is an effect that can be.

FIG. 3 is a cross-sectional view showing the control device of the first embodiment. FIG. 2 is a schematic diagram illustrating a housing configuration of the control device according to the first embodiment. It is a figure which shows the heat sink cross section of the AA arrow of FIG. 4 is a cross-sectional view showing the vicinity of a fan mounting plate according to Embodiment 1. FIG. 2 is a cross-sectional view showing the vicinity of an exhaust port plate according to Embodiment 1. FIG. FIG. 3 is a diagram illustrating a state of a louver when a water droplet is dropped according to the first embodiment. It is a figure which shows the structure where the louver by Embodiment 1 was provided substantially horizontal or downward. 2 is a cross-sectional view showing the vicinity of an exhaust port plate according to Embodiment 1. FIG. It is a figure which shows the louver shape by Embodiment 1. FIG. 6 is a cross-sectional view showing a control device according to Embodiment 2. FIG.

Embodiment 1 FIG.
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a control device 100 equipped with, for example, an inverter provided in a packaged air conditioner according to Embodiment 1 of the present invention. The control apparatus 100 according to the first embodiment is vertically attached to the mounting surface 30 of the packaged air conditioner with respect to the ground.
In order to explain the arrangement of the six side plates constituting the casing 20 that forms a substantially rectangular parallelepiped, FIG. 2 shows a rectangular parallelepiped in which the casing 20 is schematically illustrated. As shown in FIG. 2, the housing 20 includes a bottom plate 21 and a top plate 22 facing the bottom plate 21, a first side plate 23 that connects the bottom plate 21 and the top plate 22, and a second side plate that faces the first side plate 23. Side plate 24, these bottom plate 21, top plate 22, fan mounting plate 25 connecting the lower part of first side plate 23, and exhaust port plate 26 connecting the upper part. The exhaust port plate 26 is formed in a shape like a bowl.
As shown in FIG. 1, the inside of the housing 20 has an air guide plate 5 for cooling air blown out from the fan 1 described later so as to form a first air passage 50, a second air passage 51, and a third air passage 52. And the first partition plate 4 and the second partition plate 3. The heat sink 2 occupying most of the housing 20 is arranged in parallel with the bottom plate 21 in the vertical direction in FIG. 1 in order to reduce the installation area of the control device 100.

A filter 10 corresponding to a first electronic control component and a reactor 11 are disposed on the bottom plate 21, and a first partition plate 4 is provided on the upper portions 10 a and 11 a of the filter 10 and the reactor 11. The first partition plate 4 and the heat sink 2 are provided in parallel with the bottom plate 21 in contact with the partition plate 4. FIG. 3 shows a cross-sectional view of the heat sink 2 taken along the line AA in FIG. A second partition plate 3 is provided on the upper part 2 b of the heat sink 2, and a power element 7, a diode bridge 8, and a capacitor 9 corresponding to the second electronic control component are attached to the heat sink 2.
As shown in FIG. 3, the heat sink 2 includes a comb-like fin 2 a, which is made of, for example, Al or an Al alloy, but is not necessarily limited thereto, and the shape is not limited to the comb-like fin 2 a but a pin-like fin provided with a plurality of pins. It may be.
Here, among the second electronic control components arranged in the third air passage 52, the power element 7 having the largest heat generation is the most among the first electronic control components arranged in the first air passage 50. It arrange | positions in the position away from the reactor 11 with big heat_generation | fever and big heat resistance. That is, in the first embodiment, the power element 7 is disposed at a location close to the wind guide plate 5 of the heat sink 2 where the cooling effect by the cooling air is most remarkable, and the reactor 11 is not cooled by the heat sink 2, Since it arrange | positions at the tail end of the 1st air path 50, size reduction of the heat sink 2 is attained.
1 is arranged in the order of the first electronic control component, the heat sink 2, and the second electronic control component on the bottom plate 21, but the present invention is not limited to this, and the first and second components are not limited to this. The arrangement of the electronic control parts may be interchanged.

  Next, the configuration of the fan 1 and the fan mounting plate 25 provided at the lower part of the housing 20 will be described. As shown in FIGS. 1 and 4, the fan 1 is installed on the fan mounting plate 25 with a predetermined fan mounting angle θ with respect to the bottom plate 21 of the housing 20. The fan mounting angle θ is an arbitrary angle in the range of 5 ° to 60 ° depending on factors such as the size of the housing 20. The fan mounting plate 25 is provided with a wind guide plate 5 extending in the inner direction of the housing 20, and the front end portion of the fan mounting plate 25 comes into contact with the first partition plate 4 and the second partition plate 3 described above. Two air passages 51 are formed. The air guide plate 5 is provided on the fan mounting plate 25 so that the cross section of the air path formed by the air guide plate 5 decreases toward the second air passage 51. Furthermore, as shown in FIG. 4, the wind guide plate 5 is provided with an air inlet 5a so that the cooling air blown from the fan 1 is divided into the first air path 50 and the third air path 52 described above. In addition, a movable shutter 5b is provided at each of the wind intake ports 5a. By operating the movable shutter 5b, the amount of cooling air to be diverted can be adjusted. The ratio of the cooling air flowing through the first air passage 50, the second air passage 51, and the third air passage 52 is preferably 1 to 3 to 10 to 1 to 3.

  Moreover, the direction change board 13 is provided in the 1st wind path 50 and the 3rd wind path 52 side of the wind guide board 5, respectively, Thereby, the direction of the cooling wind which flowed in via the wind inlet 5a is provided. Convert to fan 1 side. This is because when the fan 1 entrains water droplets for some reason, the fan 1 is mixed into the first air passage 50 and the third air passage 52 and damages the first electronic control component and the second electronic control component. In order to prevent the water droplets from colliding with the direction changing plate 13 and dropping to the lower part or colliding with the lower part, the water drops do not easily reach the first electronic control component and the second electronic control component. is there. Although the example in which the wind guide plate 5 is provided on the fan mounting plate 25 is shown, the wind guide plate 5 having the same structure is provided on the housing of the fan 1, and the fan with the wind guide plate is provided on the fan mounting plate 25. You may make it install.

Next, the louver 6 provided on the exhaust port plate 26 at the top of the housing 20 will be described.
FIG. 5A is a cross-sectional view showing a plurality of louvers 6 provided on the exhaust port plate 26 for heat dissipation in the housing 20. As shown in FIG. 5 (a), the cooling air divided into the first air passage 50, the second air passage 51, and the third air passage 52 inside the housing 20 is in front of the exhaust port plate 26. And are exhausted vigorously out of the housing 20 through a plurality of louvers 6 provided on the exhaust port plate 26. The plurality of louvers 6 are provided in a step shape, and are formed so that the projected portions T of the upper louvers 6 overlap at least the lower louvers 6 as shown in FIG. In the first embodiment, an example in which a plurality of louvers 6 are provided on the inclined surface of the exhaust port plate 26 as shown in FIG. 5A is shown, but the projection of the upper louver 6 described above is not necessarily an inclined surface. What is necessary is just to be provided in the exhaust port plate 26 so that the part T may overlap with the lower louver 6. FIG. In the first embodiment, the cooling air passing through the plurality of louvers 6 is deflected by 90 ° with respect to the first air passage 50, the second air passage 51, and the third air passage 52 in the casing 20. And although it exhausts toward the direction opposite to the baseplate 21, it is not limited to this, What is necessary is just a direction which does not interfere with the attachment surface 30 shown in FIG.

FIG. 6 shows a state of the louver 6 when a water droplet falls on the control device 100 attached vertically to the ground as shown in FIG. As can be seen from FIG. 6, even if a substantially vertical drop of water drops from above the louver 6, it does not fall directly under the housing 20, and the water drops W once held in the louver 6 are discharged by the exhaust momentum. Or, since it evaporates by exhaust heat, it does not enter the housing 20. Further, as shown in FIG. 7 (a) and FIG. 7 (b), the if as a heat sink 2 to the range of the louver opening director L ₀ of the plurality of louvers 6 are arranged, even if falling into the housing 20 Even if the water droplets penetrated, the water droplets are only in the heat sink 2 part, and adverse effects on the first electronic control component and the second electronic circuit component can be prevented.
Further, as shown in FIG. 8, when the configuration in which the first partition plate 4 and the second partition plate 3 are extended to the vicinity of the louver 6 of the exhaust port plate 26 is used, not only for the diversion of the cooling air, It becomes possible to have a further drip-proof effect in combination.
Further, the louver 6 does not have to be horizontal as shown in FIG. 7A, and may be inclined downward as shown in FIG. 7B. Further, the louver 6 may be provided on three side surfaces of the exhaust port plate 26 having a shape with the bowl turned down as shown in FIG. 9 without being provided on one surface with respect to the exhaust port plate 26.

  When the control device 100 having such a configuration is mounted vertically on the mounting surface 30 and the operation is performed, the cooling air blown up from the fan 1 (updraft air) is increased in flow rate by the wind guide plate 5 and the second wind. It collides with the heat sink 2 provided in the path 51. The heat sink 2 to which the power element 7 is attached is efficiently cooled by the collision cooling effect of the cooling air, and the heat generated by the diode bridge 8 is continuously dissipated. The amount of cooling air blown out from the fan 1 is sufficient to cool the heat sink 2, and the first air path 50 and the third air flow through the air intake 5 a provided in the air guide plate 5. It is also diverted to the air passage 52. In the first air passage 50, heat is radiated from the surfaces of the filter 10 and the reactor 11 corresponding to the first electronic control component. In the third air path 52, heat is radiated from the surface side of the power element 7 and the diode bridge 8 corresponding to the second electronic control component, the capacitor 9, and the like. Since the power element 7 and the diode bridge 8 arranged in the third air passage 52 are radiated from the front and back in this way, the radiated heat is more efficiently performed than the heat radiated from the heat sink 2 alone. The body 20 can be reduced in size. In addition, since sufficient cooling can be performed, the first and second electronic control parts can exhibit stable performance, and the life of the parts can be extended. As a result, long life can be controlled by small and stable operation. There exists an effect that the apparatus 100 is obtained.

Embodiment 2. FIG.
In the second embodiment, as shown in FIG. 10, the control device 100 shown in the first embodiment is vertically attached to the attachment surface 30, and the entire control device 100 is covered with a housing cover 14. By attaching the housing cover 14, there is an effect that not only drip-proof but also a sufficient clearance for cooling air suction from the lower part of the control device 100 can be secured.

Embodiment 3 FIG.
In the first embodiment, the configuration in which the control device 100 is installed vertically with respect to the mounting surface 30 is shown. However, the control device 100 having the configuration shown in the first embodiment is installed in a facility that is parallel to the ground. It may be attached via the bottom plate 21. However, in this case, it is desirable that the environment in which the control device 100 is installed is an air-conditioned environment in which water droplets are not dropped due to condensation or the like.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

1 fan, 2 heat sink, 2a comb-shaped fin, 2nd partition plate,
4 first partition plate, 5 wind guide plate, 5a wind intake port, 5b movable shutter, 6 louver,
20 housing, 21 bottom plate, 22 top plate, 25 fan mounting plate, 26 exhaust port plate,
50 1st air path, 51 2nd air path, 52 3rd air path, 100 control apparatus.

Claims (12)

In a control device including a substantially rectangular parallelepiped housing that houses a first electronic control component, a second electronic control component, and a heat sink,
The housing includes a bottom plate, a top plate facing the bottom plate, a first side plate and a second side plate facing the bottom plate and the top plate, respectively, and the bottom plate, the top plate, the first and second plates. Are formed by a fan mounting plate provided on one end side and an exhaust port plate provided on the other end facing the fan mounting plate.
The first electronic control component is disposed on the bottom plate, a first partition plate provided on the first electronic control component, and the heat sink in contact with the first partition plate The second electronic control component is mounted on the heat sink, and a second partition plate is provided on the heat sink. The second partition plate is provided on the heat sink. The first air passage between the partition plate and the second air passage between the first partition plate and the second partition plate is between the second partition plate and the top plate. A wind guide plate is provided on the fan mounting plate side of the first partition plate and the second partition plate so that a third air path is formed,
Cooling air blown from a fan mounted on the fan mounting plate and installed at a predetermined mounting angle with respect to the bottom plate passes through the first, second and third air passages via the wind guide plate. The control device, wherein the first electronic control component, the second electronic control component, and the heat sink are cooled and exhausted out of the casing through a plurality of louvers provided on the exhaust port plate. Among the first electronic control components, the electronic control component that generates the largest amount of heat and the control component that generates the largest amount of heat among the second electronic control components are arranged at locations separated from each other. The control device according to claim 1. The control device according to claim 1, wherein the heat sink is provided with either a comb-like fin or a plurality of pin-like fins. The control device according to claim 1, wherein the predetermined mounting angle of the fan with respect to the bottom plate is an arbitrary angle between 5 ° and 60 °. 2. The control device according to claim 1, wherein the wind guide plate is formed so that a cross section of the wind path formed by the wind guide plate decreases as it goes toward the second air path. The cooling air flowing through the first and third air passages flows through a wind intake port provided in the wind guide plate, and a movable shutter is provided that can adjust the opening degree of the air intake port. The control device according to claim 5, wherein the control device is provided. The control device according to claim 5, wherein the wind guide plate is provided in the fan. Cooling air that passes through the plurality of louvers provided on the exhaust plate is deflected by 90 ° with respect to the first, second, and third air passages, and on the opposite side of the direction in which the bottom plate is provided. 2. The control device according to claim 1, wherein the plurality of louvers are provided in a step shape while being exhausted, and a projection portion of each upper louver is formed so as to at least overlap the lower louver. The said housing | casing is attached to the attachment surface of the installation which uses this control apparatus so that it may become perpendicular | vertical with respect to the ground through the said baseplate. The control device described in 1. The control device according to claim 9, wherein the cooling air blown from the fan is attached so as to be an updraft. The control according to claim 10, wherein the first partition plate and the second partition plate are provided so as to extend to positions close to a plurality of louvers provided on the exhaust port plate. apparatus. The control according to any one of claims 1 to 7, wherein the casing is attached to equipment using the control device so as to be parallel to the ground via the bottom plate. apparatus.

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