Variable frequency capacitor temperature uniform structure and variable frequency device

Abstract

The utility model relates to the technical field of air-cooled frequency converter capacitor heat dissipation, especially to frequency converter capacitor uniform temperature structure and frequency converter, including fan, its starting time can produce the airflow flowing along the first direction, two and above capacitors, the connection between two and above capacitors extends along the second direction, wherein, in the same plane, the first direction and the second direction are not parallel. The airflow produced by the fan of the utility model is not completely shielded by the previous capacitor, and a part of the airflow will directly blow to the surface of the next capacitor, that is, the airflow produced by the fan can directly blow to each capacitor, ensuring that the heat generated by each capacitor during operation can be quickly dissipated, and the service life of each capacitor is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for air-cooled inverter capacitors, specifically to an inverter capacitor temperature uniformity structure and an inverter. Background Technology

[0002] Air-cooled frequency converters are frequency conversion devices that operate through air cooling and are widely used in industrial automation, machinery manufacturing, energy management and other fields.

[0003] As power density requirements increase and overall size requirements decrease, the distance between electrical components inside frequency converters is gradually shrinking. For example, the distance between capacitors inside a frequency converter is very small. Moreover, currently, the wiring connecting multiple capacitors inside a frequency converter is parallel to the airflow direction inside the duct. In this case, when the fan blows air into the duct inside the frequency converter, the airflow will first blow onto the capacitor at the front, and then blow onto the capacitors behind it in turn. Since the capacitor at the front receives more airflow than the capacitors behind it, some airflow is blocked by the capacitor at the front. This results in inconsistent heat dissipation rates for each capacitor, and the lifespan of the capacitors with higher temperatures will be greatly reduced. Utility Model Content

[0004] The purpose of this invention is to provide a capacitor temperature uniformity structure and a frequency converter to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a frequency converter capacitor temperature uniformity structure, comprising:

[0006] A fan that generates airflow in a first direction when it is started;

[0007] Two or more capacitors, wherein the connection between the two or more capacitors extends along a second direction;

[0008] Within the same plane, the first direction and the second direction are not parallel.

[0009] Preferably, it also includes a support housing, on which the fan is fixedly mounted.

[0010] Preferably, the support housing is also provided with a heat sink.

[0011] Preferably, a through hole is provided on the support housing corresponding to the position of the capacitor, and the capacitor passes through the through hole.

[0012] Preferably, a limiting member is provided around the through hole, and the limiting member is used to fix the capacitor.

[0013] Preferably, the limiting member includes claws, and at least three claws are provided.

[0014] A frequency converter, wherein the frequency converter includes the above-mentioned frequency converter capacitor temperature uniform structure.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this invention, the airflow generated by the fan is not completely blocked by the previous capacitor, and some of the airflow will directly blow onto the surface of the next capacitor. This means that the airflow generated by the fan can directly blow onto each capacitor, ensuring that the heat generated by each capacitor during operation can be quickly dissipated, thus guaranteeing the service life of each capacitor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the chuck claw of this utility model.

[0019] In the diagram: 1. Fan; 2. Capacitor; 3. Support housing; 31. Through hole; 4. Heat sink; 5. Clip. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-2 This utility model provides a technical solution:

[0022] The inverter capacitor temperature uniform structure includes a fan 1, a capacitor 2, a support housing 3, and a heat sink 4. The fan 1 and the heat sink 4 are both fixedly mounted on the support housing 3. The fan 1 is located at the left end of the heat sink 4, and the capacitor 2 is located on one side of the heat sink 4. When the fan 1 is started, it can generate an airflow along the first direction b. The airflow generated by the fan 1 can blow on the surface of the capacitor 2 and the heat sink 4, thereby removing the heat from the capacitor 2 and the heat sink 4.

[0023] In this embodiment, two capacitors 2 are used as an example for explanation. Specifically, as follows: Figure 1 As shown, the line connecting the two capacitors 2 extends along the second direction a; from Figure 1It is clear from this that, within the same plane, the first direction b and the second direction a are not parallel; or, from another perspective, from... Figure 1 As can be seen, the distances between the two capacitors 2 and the heatsink 4 are different. The capacitor 2 closer to the fan 1 can be recorded as the first capacitor, and the capacitor 2 farther away from the fan 1 can be recorded as the second capacitor. The distance between the first capacitor and the heatsink 4 is greater than the distance between the second capacitor and the heatsink 4. Therefore, the airflow generated by the fan 1 will not be completely blocked by the first capacitor, and some airflow will directly blow onto the surface of the second capacitor. This means that the airflow generated by the fan 1 can directly blow onto each capacitor 2, ensuring that the heat generated by each capacitor 2 can be quickly dissipated when it is working, thus ensuring the service life of each capacitor 2.

[0024] A through hole 31 is provided on the support housing 3 at the position corresponding to the capacitor 2, and the capacitor 2 passes through the through hole 31. Furthermore, a limiting component is provided around the through hole 31 to fix the capacitor 2. In this embodiment, the limiting component includes claws 5, and at least three claws 5 are provided. When the capacitor 2 passes through the through hole 31, the claws 5 are evenly arranged in a ring around the capacitor 2. For a capacitor 2 with a relatively high height, being suspended in the air duct for a long time and fixed by welding two pins may cause the pins of the capacitor 2 to loosen due to vibration or transportation factors, leading to failure. Therefore, in this embodiment, the through hole 31 and the claws 5 are used to limit the position of the capacitor 2, which helps to prevent the capacitor 2 from failing due to vibration or transportation factors.

[0025] The frequency converter includes the aforementioned frequency converter capacitor temperature uniform structure.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A capacitor temperature uniformity structure for frequency converters, characterized in that, include: A fan that generates airflow in a first direction when it is started; Two or more capacitors, wherein the connection between the two or more capacitors extends along a second direction; Within the same plane, the first direction and the second direction are not parallel.

2. The inverter capacitor temperature uniformity structure according to claim 1, characterized in that, It also includes a support housing, on which the fan is fixedly mounted.

3. The inverter capacitor temperature uniformity structure according to claim 2, characterized in that, A radiator is also provided on the support housing.

4. The inverter capacitor temperature uniformity structure according to claim 2, characterized in that, A through hole is provided on the support housing corresponding to the position of the capacitor, and the capacitor passes through the through hole.

5. The inverter capacitor temperature uniformity structure according to claim 4, characterized in that, A limiting member is provided around the through hole, and the limiting member is used to fix the capacitor.

6. The inverter capacitor temperature uniformity structure according to claim 5, characterized in that, The limiting component includes claws, and at least three claws are provided.

7. A frequency converter, characterized in that, The frequency converter includes the frequency converter capacitor temperature uniform structure as described in any one of claims 1-6.

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