CN203632536U - Heat radiation structure for frequency converter - Google Patents

Abstract

The utility model provides a heat radiation structure for a frequency converter. The heat radiation structure comprises a first radiator used for the heat radiation of a first heating unit, a second radiator used for the heat radiation of a second heating unit, a switching plate, first screws and second screws, wherein a side surface of a substrate of the first radiator is provided with first screw holes, a side surface of a substrate of the second radiator is provided with second screw holes, the switching plate is provided with a plate-shaped main body, first installing holes are arranged at positions of the plate-shaped main body corresponding to the first screw holes, second installing holes are arranged at positions of the plate-shaped main body corresponding to the second screw holes, the first radiator penetrates through the first installing holes, is threadingly connected with the first screws of the first screw holes, and is fixed with the switching plate, and the second radiator penetrates through the second installing holes, is threadingly connected with the second screws of the second screw holes, and is fixed with the switching plate. According to the heat radiation structure for the frequency converter, the two radiators are spliced together via the switching plate, the integrity of the radiators is guaranteed under the premise that the cost is slightly increased.

Description

Heat dissipation structure for inverter

technical field

The utility model relates to the field of frequency converters, in particular to a heat dissipation structure for frequency converters.

Background technique

As a converter, the frequency converter will generate certain power consumption during operation. Generally, the power consumption of the inverter is generally 4-5% of its capacity, of which the inverter part accounts for about 50%, the rectifier and DC circuit account for about 40%, and the control and protection circuit is 5-15%, that is, most of the power consumption is in the On the rectifier module and IGBT module. The consumed electric energy is generally converted into heat. If the heat cannot be dissipated in time, the reliability and service life of the device will be greatly reduced.

In some inverters, the IGBT module and the rectifier module are implemented by different devices. If the two devices share the same driver board, and the two devices are not the same height, it is not possible to use one heat sink to cool both of them.

In order to solve the heat dissipation problem of the above-mentioned IGBT modules and rectifier modules with different heights, two heat sinks with different heights are usually used to dissipate heat respectively, but two heat sinks with different heights will complicate the production assembly and grounding structure, and give production is difficult.

In addition, it is also possible to remove the height difference on the same heat sink by machining, so that one heat sink can be used to dissipate heat for two devices. However, the cost of machining to remove the height difference is too high, which is not conducive to mass production.

Utility model content

The technical problem to be solved by the utility model is to provide a heat dissipation structure for a frequency converter in view of the complex grounding structure and high processing cost of radiators of different heating units in the frequency converter.

The technical solution of the utility model to solve the above-mentioned technical problems is to provide a heat dissipation structure for a frequency converter, including a first radiator for dissipating heat for the first heating unit, and a second radiator for dissipating heat for the second heating unit; The heat dissipation structure for the frequency converter also includes an adapter plate, a first screw and a second screw, wherein: the side of the base plate of the first heat sink is provided with a first screw hole; the side of the base plate of the second heat sink is provided with a second screw hole. Two screw holes; the adapter plate has a plate-shaped main body, and the plate-shaped main body is provided with a first mounting hole at a position corresponding to the first screw hole, and a second mounting hole is provided at a position corresponding to the second screw hole; The first heat sink is fixed to the adapter plate by the first screw passing through the first mounting hole and screwed to the first screw hole; the second heat sink is fixed to the adapter plate by passing through the second mounting hole and screwing to the second screw hole The screws are fixed with the adapter plate.

In the heat dissipation structure for frequency converters described in the present invention, the first heating unit and the second heating unit are installed on the same driving board, and the height of the first heating unit protruding from the surface of the driving board is greater than that of the second heating unit Protrude the height of the drive plate.

In the heat dissipation structure for frequency converter described in the present invention, the height of the first heat sink is smaller than that of the second heat sink, and the ends of the heat dissipation fins of the first heat sink and the second heat sink are flush.

In the heat dissipation structure for frequency converter according to the utility model, the distance between the first installation hole and the bottom end of the plate-shaped main body is smaller than the distance between the second installation hole and the bottom end of the plate-shaped main body, and the plate-shaped The side of the first mounting hole on the main body facing away from the first radiator has a counterbore structure.

In the heat dissipation structure for frequency converters described in the present invention, the adapter plate also includes a folded edge located at the bottom end of the plate-shaped main body, and the folded edge is provided with a fixing hole; the folded edge is perpendicular to the plate-shaped main body and Located on one side of the plate-like body.

In the heat dissipation structure for frequency converter described in the present invention, the lower surface of the folded edge is flush with the ends of the heat dissipation fins of the first heat sink and the second heat sink, and the first heat sink where the folded edge is located The cooling fins of the heat sink or the second heat sink are recessed.

In the heat dissipation structure for a frequency converter described in the present invention, the plate-shaped main body is integrated with the folded edge.

The heat dissipation structure for frequency converter of the utility model has the following beneficial effects: the two radiators are spliced together through the adapter plate, the integrity of the radiator is ensured on the premise of minimally increased cost, and the efficiency of production and assembly can be shortened. And the utility model directly improves the grounding continuity of the two radiators.

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of a cooling structure for a frequency converter of the present invention.

Fig. 2 is an exploded view of the heat sink for the frequency converter in Fig. 1 .

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1-2, it is a schematic diagram of an embodiment of the heat dissipation structure for the inverter of the present invention, which is used to dissipate heat for two heating units on the same drive board in the inverter. The cooling structure for frequency converter in this embodiment includes a first radiator 10, a second radiator 20, an adapter plate 30, two first screws 41 and two second screws 42, wherein the first radiator 10 is used for The first heating unit (such as IGBT unit or rectification unit, etc.) dissipates heat, and the second radiator 20 is used to dissipate heat for the second heating unit (such as IGBT unit or rectification unit, etc.); There are two first screw holes, and the side of the base plate of the second heat sink 20 is provided with two second screw holes 22; Two first installation holes 31 are provided on the shape body corresponding to the first screw holes, and two second installation holes 32 are provided on the positions corresponding to the second screw holes 22 . The first heat sink 10 is fixed to the adapter plate 30 through the first screw 41 passing through the first mounting hole 31 and screwed to the first screw hole, and the second heat sink 20 is fixed to the adapter plate 30 through the second mounting hole 32 and screwed to the first screw hole. The second screw 42 connected to the second screw hole 22 is fixed to the adapter plate 30 .

Of course, in practical applications, the number of the first screw hole, the first mounting hole 31, the second screw hole 22, the second mounting hole 32, the first screw 41 and the second screw 42 is not limited to two in Fig. 1 , Adjustable to the size of the two radiators.

The heat dissipation structure for the frequency converter splices the two heat sinks into one through the adapter plate 30 , which ensures the integrity of the heat sinks and directly improves the grounding continuity of the two heat sinks with minimal cost increase.

In particular, the first heating unit and the second heating unit in the heat dissipation structure for the frequency converter are installed on the same driving board, and the height of the first heating unit protruding from the surface of the driving board is greater than the height of the second heating unit protruding from the driving board. That is to say, the heat dissipation structure for the frequency converter can dissipate heat for heating units with different heights, and the upper surfaces of the base plate of the first heat sink 10 and the base plate of the second heat sink 20 are not on the same plane, as shown in FIG. 1 . Of course, the above structure can also be applied to the application of three or more heating elements with different heights. In addition, the above structure can also be applied to the application of two or more heating elements with the same height.

As shown in FIG. 1 , in this embodiment, the height of the first heat sink 10 is smaller than that of the second heat sink 20 , and the ends of the heat dissipation fins of the first heat sink and the second heat sink are flush. Correspondingly, the distance between the first mounting hole 31 on the plate-shaped body of the adapter plate 30 and the bottom end of the plate-shaped body is smaller than the distance between the second mounting hole 32 and the bottom end of the plate-shaped body. In order to ensure that the first screw 41 used to fix the first heat sink 10 and the adapter plate 30 does not affect the tight fit between the heat sink and the adapter plate 30, the first mounting hole 31 on the plate-shaped main body can be made to face away from the first heat sink One side of 10 has a counterbore structure. Of course, the side of the second mounting hole 32 on the plate-shaped body facing away from the second heat sink 20 may also have a counterbore structure.

In addition, the adapter plate 30 may also include a folded edge 33 located at the bottom end of the plate-shaped body, and the folded edge 33 is perpendicular to the plate-shaped body and located on one side of the plate-shaped body (such as the first shown in Figures 1 and 2 side of the radiator 10). A fixing hole may be provided on the folded edge 33, so that the folded edge 33 can be fixed on the mounting plate inside the inverter housing. In actual implementation, the folded edge 33 can be integrated with the plate-shaped main body.

In particular, the lower surface of the folded edge 33 is flush with the ends of the heat dissipation fins of the first heat sink 10 and the second heat sink 20, and the first heat sink 10 or the second heat sink where the folded edge 33 is located 20 (such as the first heat sink 10 shown in FIGS. 1 and 2 ) has concave fins to avoid folded edges 33 .

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (7)

1. A cooling structure for a frequency converter, comprising a first radiator for cooling the first heating unit, and a second radiator for cooling the second heating unit; it is characterized in that: the cooling structure for the frequency converter also includes a rotating Connecting plate, first screw and second screw, wherein: the side of the substrate of the first radiator is provided with a first screw hole; the side of the substrate of the second radiator is provided with a second screw hole; The connecting plate has a plate-shaped main body, and the position of the plate-shaped main body corresponding to the first screw hole is provided with a first mounting hole, and the position corresponding to the second screw hole is provided with a second mounting hole; the first radiator passes through The first screw that passes through the first mounting hole and is screwed to the first screw hole is fixed to the adapter plate; the second heat sink is fixed to the adapter plate through the screw that passes through the second mounting hole and is screwed to the second screw hole . 2. The cooling structure for frequency converter according to claim 1, characterized in that: the first heating unit and the second heating unit are mounted on the same driving board, and the first heating unit protrudes above the height of the surface of the driving board greater than the height of the second heating unit protruding from the driving board. 3. The cooling structure for frequency converter according to claim 2, characterized in that: the height of the first radiator is smaller than the height of the second radiator, and the ends of the cooling fins of the first radiator and the second radiator flush. 4. The heat dissipation structure for frequency converter according to claim 3, characterized in that: the distance between the first installation hole and the bottom end of the plate-shaped main body is smaller than the distance between the second installation hole and the bottom end of the plate-shaped main body, and the rotating The side of the first mounting hole on the plate-shaped main body of the connecting plate facing away from the first heat sink has a counterbore structure. 5. The heat dissipation structure for frequency converter according to claim 3, characterized in that: the adapter plate also includes a folded edge located at the bottom end of the plate-shaped main body, and the folded edge is provided with a fixing hole; the folded edge is vertical on the plate-shaped main body and on one side of the plate-shaped main body. 6. The heat dissipation structure for frequency converter according to claim 5, characterized in that: the lower surface of the folded edge is flush with the ends of the heat dissipation fins of the first heat sink and the second heat sink, and the folded edge is located The heat dissipation fins of the first heat sink or the second heat sink are recessed. 7 . The heat dissipation structure for frequency converter according to claim 5 , wherein the plate-shaped main body is integrated with the folded edge. 7 .

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