Sealed air duct heat dissipation structure of high-power power supply converter

Abstract

The utility model discloses a closed air duct heat dissipation structure of a high-power power converter, which comprises a heat dissipation mechanism for mounting a power converter circuit, the heat dissipation mechanism comprises an air duct shell structure, and a converter circuit mounting bracket seat is fixedly mounted at the top of the air duct shell structure; the heat dissipation mechanism further comprises a plurality of heat dissipation fin plates, and a heat dissipation channel is formed between every two adjacent heat dissipation fin plates. An air inlet support is mounted at one end of the air duct shell structure, and a plurality of air inlet holes corresponding to the heat dissipation channels are formed in the air inlet support; the air inlet hole is aligned with a channel opening part of the heat dissipation channel; a fan cover is mounted at the other end of the air duct shell structure; a fan is mounted at the air outlet end of the fan cover; an air outlet support is installed at the air outlet end of the fan. According to the structure, the heat dissipation efficiency is high, each side wall of each heat dissipation fin plate in the heat dissipation structure can make contact with cooling air flow, so that the heat dissipation speed is high, and the heat dissipation structure is arranged in the relatively sealed shell cavity, so that the heat dissipation structure is protected, and dust is prevented from being attached to the heat dissipation fin plates.

Description

Technical Field

[0001] This utility model belongs to the field of heat dissipation technology of power converters, and particularly relates to a closed air duct heat dissipation structure for high-power power converters. Background Technology

[0002] A power converter is a power electronic device that efficiently converts electrical energy into different forms. Its working principle is to convert the input power into an electrical energy form that meets the specific load requirements, such as converting AC power to DC power.

[0003] High-power power converters typically have power ratings ranging from several kilowatts to megawatts, making them widely used in industry, such as for industrial motor drives.

[0004] The core structure of a high-power power converter is its circuit structure, including a circuit board and a large number of electronic components mounted on the circuit board. During operation, the circuit components of the power converter generate a lot of heat. Therefore, if the heat cannot be dissipated in time, it will not only affect the normal operation of the power converter and cause the circuit components to overheat and be damaged, but in severe cases, it may also cause the working equipment, such as the motor, to malfunction, which may lead to a series of safety accidents.

[0005] Therefore, in existing technologies, heat sinks are installed at the bottom of the power converter's operating circuit, and heat is dissipated through heat exchange with the air via the heat dissipation fins on the heat sink. This method can indeed dissipate heat for the circuit components to some extent. However, as the thickness of dust adhering to the heat dissipation fins increases, the heat dissipation efficiency decreases significantly, eventually not only failing to dissipate heat but also affecting heat dissipation. Therefore, existing technologies use fans to increase heat dissipation efficiency. However, in actual operation, it has been found that the cooling airflow generated by the fan is not very efficient at cooling the heat sink because the heat sink is composed of multiple heat dissipation fins, and the cooling airflow generated by the fan cannot fully contact each heat dissipation fin to carry away heat. Consequently, when the equipment is operating under high load and high temperature environments, the heat dissipation efficiency cannot meet the operating requirements of the power converter.

[0006] Therefore, designing a heat dissipation structure with extremely high heat dissipation efficiency is crucial for improving the heat dissipation effect of high-power power converters, enhancing operational safety and stability, and protecting the equipment. Utility Model Content

[0007] Based on the above background, the purpose of this utility model is to provide a closed-loop heat dissipation structure for a high-power power converter.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A closed-loop heat dissipation structure for a high-power power converter includes a heat dissipation mechanism for mounting the power converter circuit. The heat dissipation mechanism includes a duct housing structure, and a converter circuit mounting bracket is fixedly mounted on the top of the duct housing structure.

[0010] The heat dissipation mechanism also includes several heat dissipation fins installed in the air duct shell structure, and heat dissipation channels are formed between adjacent fins.

[0011] An air inlet bracket is installed at one end of the air duct shell structure. The air inlet bracket has several air inlet holes corresponding to the heat dissipation channel. The air inlet holes are aligned with the channel opening of the heat dissipation channel.

[0012] A fan shroud is installed at the other end of the air duct shell structure, and a fan is installed at the air outlet end of the fan shroud.

[0013] The fan's outlet end is equipped with an air outlet bracket.

[0014] Preferably, the duct housing structure includes duct housing supports spaced apart on both sides, and duct panels are fixedly installed on the outer sides of the duct housing supports respectively;

[0015] A sealing base is fixedly connected between the bottoms of the air duct housing support;

[0016] A cavity for assembling heat dissipation fins is formed between the sealing base and the air duct panel. The heat dissipation fins are located inside the cavity, and the bottom of the heat dissipation fins is fixedly installed at the top position of the sealing base.

[0017] Preferably, the hood includes a housing portion, the air inlet of the housing portion is integrally formed with an inner assembly portion, and the inner assembly portion is fixedly assembled on the air duct housing support.

[0018] The air outlet of the cover is integrally formed with an outer assembly part, which is mounted on the fan.

[0019] Preferably, the top of the internal assembly is fixedly connected to a bracket mounting frame, and the top of the inner end of the converter circuit mounting bracket is fixedly mounted at the bottom position of the bracket mounting frame.

[0020] Preferably, the fan includes a fan housing, and the outer assembly is mounted on one end of the fan housing.

[0021] Preferably, the front and rear sides of the internal assembly are respectively mounted on the air duct housing support;

[0022] The bottom of the internal assembly is mounted on top of the sealing base.

[0023] Preferably, the air outlet bracket is fixedly installed at the other end of the fan housing.

[0024] Preferably, the air outlet bracket is provided with an exhaust port, and a baffle is fixedly connected to the exhaust port.

[0025] Preferably, the converter circuit mounting bracket has several heat dissipation slots.

[0026] The heat dissipation fins are provided with U-shaped openings that cooperate with the heat dissipation channel structure.

[0027] Preferably, the back sides of the air inlet bracket are fastened to the end positions of the air duct housing bracket by a number of bolts.

[0028] This utility model has the following beneficial effects:

[0029] 1. By installing the heat dissipation fins within the relatively sealed cavity of the air duct shell structure, dust in the air is prevented from adhering to the heat dissipation fins, thus avoiding impact on their heat exchange efficiency, and the heat dissipation fins are protected. Simultaneously, the air duct shell structure acts as a heat dissipation channel; when airflow enters the cavity of the air duct shell structure, the cooling airflow enters from one end and exits from the other. Therefore, the airflow guiding effect of the air duct shell structure significantly improves efficiency.

[0030] 2. An air inlet bracket is installed at the right end of the aforementioned air duct shell structure. The air inlet bracket has several air inlets corresponding to the heat dissipation channels (heat dissipation channels are formed between adjacent heat dissipation fins). The air inlets are aligned with the channel openings (right end position) of the heat dissipation channels. When cooling air enters through each air inlet, because the air inlets are aligned with the heat dissipation channels formed by each pair of adjacent heat dissipation fins, all heat dissipation fins can contact the cooling air, thus achieving efficient heat dissipation. Therefore, by aligning the air inlets with the heat dissipation channels, the cooling airflow is diverted and enters the heat dissipation channels formed by each pair of heat dissipation fins, thereby increasing heat dissipation efficiency.

[0031] 3. The converter circuit mounting bracket has several heat dissipation slots; correspondingly, the heat dissipation fins have U-shaped openings that mate with the heat dissipation slots. This allows cooling airflow to enter through the heat dissipation slots and directly cool the power converter's operating circuitry.

[0032] 4. The heat dissipation structure disclosed in this utility model not only has high heat dissipation efficiency, but also ensures that each side wall of each heat dissipation fin can contact the cooling airflow, thus achieving fast heat dissipation. Furthermore, the heat dissipation structure is arranged in a relatively sealed shell cavity to protect the heat dissipation structure and prevent dust from adhering to the heat dissipation fins. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0035] Figure 2 This is a schematic diagram of the dispersed structure of the fan and fan cover in an embodiment of this utility model;

[0036] Figure 3 This is a schematic diagram of the structure of the wind shield in an embodiment of this utility model;

[0037] Figure 4 This is a schematic diagram of the arrangement of the heat dissipation fins in an embodiment of this utility model.

[0038] Figure 5 This is an embodiment of the present utility model. Figure 4 A structural diagram from another perspective;

[0039] Figure 6 This is a schematic diagram of the air inlet bracket in an embodiment of the present utility model;

[0040] Figure 7 This is a schematic diagram of the structure of the air duct housing support in an embodiment of the present utility model;

[0041] Figure 8 This is a schematic diagram of the structure of the air duct shell bracket for mounting the air duct panel in an embodiment of this utility model;

[0042] Figure 9 This is a schematic diagram of the structure of the sealing base in an embodiment of this utility model.

[0043] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] 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.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0047] Example 1

[0048] like Figure 1-9 As shown, a sealed airflow heat dissipation structure for a high-power power converter includes a heat dissipation mechanism for mounting the power converter circuit. The heat dissipation mechanism includes an airflow housing structure, which is the same as the existing power converter circuit mounting structure. A converter circuit mounting bracket 2 is fixedly mounted on the top of the airflow housing structure. Similar to existing methods, the power converter circuit structure (including circuit boards, circuit components, etc.) is assembled on the converter circuit mounting bracket 2.

[0049] In order to fully dissipate heat from the power converter circuit structure, the above-mentioned heat dissipation mechanism also includes several heat dissipation fins 3 installed in the air duct housing structure (the heat dissipation fins 3 are arranged in a front-to-back equidistant manner), thus forming a heat dissipation channel between adjacent heat dissipation fins 3.

[0050] Specifically, the heat dissipation fins 3 are installed inside the shell cavity of a relatively sealed air duct shell structure, which not only prevents dust in the air from adhering to the heat dissipation fins 3 and affecting the heat exchange efficiency of the heat dissipation fins 3, but also protects the heat dissipation fins 3.

[0051] Furthermore, the air duct shell structure acts as a heat dissipation and airflow guiding channel. When airflow enters the shell cavity of the air duct shell structure, the cooling airflow enters from one end of the air duct shell structure and exits from the other end. Therefore, the airflow guiding effect of the air duct shell structure greatly improves efficiency.

[0052] An air inlet bracket 1 is installed on the right end of the aforementioned air duct shell structure. The air inlet bracket 1 has several air inlet holes 11 corresponding to the heat dissipation channel. The air inlet holes 11 are aligned with the channel opening of the heat dissipation channel (right end position).

[0053] The advantages of this design method are:

[0054] First, when the cooling airflow enters through each air inlet 11, because the air inlet 11 is aligned with the heat dissipation channel formed by each pair of adjacent heat dissipation fins 3, all heat dissipation fins 3 can contact the cooling air, thereby achieving efficient heat dissipation. Therefore, by aligning the air inlet 11 with the heat dissipation channel, the cooling airflow is diverted and enters the heat dissipation channel formed by each pair of heat dissipation fins 3, thus achieving heat dissipation on each sidewall of each heat dissipation fin 3, thereby increasing the heat dissipation efficiency (the total contact area between all heat dissipation fins 3 and the cooling air is large, resulting in a large heat exchange surface).

[0055] The left end of the aforementioned air duct shell structure is equipped with an exhaust structure 6, which includes a fan shroud 62. A fan is installed at the air outlet of the fan shroud 62. During operation, under the action of the fan, the cooling airflow passes between the heat dissipation fins 3 in the manner described above.

[0056] The air outlet end of the aforementioned fan is equipped with an air outlet bracket 5.

[0057] During operation, in order to improve the heat dissipation efficiency of the power converter circuit structure, the aforementioned converter circuit mounting bracket 2 is provided with several heat dissipation slot structures B; correspondingly, the heat dissipation fin 3 is provided with a U-shaped opening A that cooperates with the heat dissipation slot structures.

[0058] This method enables cooling airflow to enter directly from the heat dissipation channel structure B and cool the power converter's operating circuitry.

[0059] Example 2

[0060] like Figure 1-9 As shown, based on the structure of Embodiment 1, the specific structure of the above-mentioned air duct shell structure is as follows:

[0061] The duct housing structure includes duct housing supports 7 spaced apart on the front and rear sides. Duct panels 41 are fixedly mounted on the outer sides of the duct housing supports 7. A sealing base 42 is fixedly connected between the bottoms of the duct housing supports 7. A cavity for assembling heat dissipation fins 3 is formed between the sealing base 42 and the duct panels 41. The heat dissipation fins 3 are located within the cavity, and their bottoms are fixedly mounted on the top of the sealing base 42.

[0062] Meanwhile, the back sides of the air inlet bracket 1 (i.e. the front and rear sides of the rear sidewall) are fastened to the right end of each air duct housing bracket 7 by several bolts.

[0063] The specific structure of the air duct shell structure assembled with the 62 air cover is as follows:

[0064] The shroud 62 includes a housing portion 622, the air inlet of which is integrally formed with an inner assembly portion 621, which is fixedly mounted on the air duct housing bracket 7. Specifically, the front and rear sides of the inner assembly portion 621 are respectively bolted to the air duct housing bracket 7 (specifically at the left end). Furthermore, the bottom of the inner assembly portion 621 is mounted on the top of the sealing base 42.

[0065] The specific structure for mounting the fan on the fan cover 62 is as follows:

[0066] The air outlet of the housing 622 is integrally formed with an external mounting part 623, which is mounted on the fan. Specifically, the fan includes a fan housing 61 (similar to existing fan structures, with fan blades 611 and a motor driving the fan blades 611 to rotate installed inside the fan housing 61). The external mounting part 623 is installed at the right end of the fan housing 61, specifically by means of bolts.

[0067] The shroud 62 is also fixedly installed on the converter circuit mounting bracket 2, and the specific installation method is as follows:

[0068] The top of the internal assembly 621 is fixedly connected to the bracket mounting frame 63, and the top of the inner end of the converter circuit mounting bracket 2 is fixedly installed at the bottom position of the bracket mounting frame 63 (similarly, it is fixedly installed by bolts).

[0069] The aforementioned air outlet bracket 5 is fixedly installed at the rear end of the fan housing 61 (specifically, by fastening with bolts).

[0070] The aforementioned air outlet bracket 5 has an exhaust port, and a baffle 51 is fixedly connected to the exhaust port. The baffle 51 protects the fan.

[0071] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A closed air duct heat dissipation structure of a high-power power converter, characterized in that, The application relates to a heat dissipation mechanism comprising a power converter circuit, wherein the heat dissipation mechanism comprises a wind channel housing structure, a converter circuit mounting support seat is fixedly arranged on the top of the wind channel housing structure; The heat dissipation mechanism further comprises a plurality of heat dissipation fin plates arranged in the wind channel housing structure, and heat dissipation channels are formed between adjacent heat dissipation fin plates; One end of the wind channel housing structure is provided with an air inlet support, and a plurality of air inlet holes corresponding to the heat dissipation channels are formed in the air inlet support; the air inlet holes are aligned with the channel opening parts of the heat dissipation channels; The other end of the wind channel housing structure is provided with a wind cover, and a fan is arranged at the air outlet end of the wind cover; An air outlet support is arranged at the air outlet end of the fan.

2. The enclosed air duct heat sink structure of a high power power converter according to claim 1, wherein, The wind channel housing structure comprises wind channel housing supports arranged at two sides and spaced apart from each other, and wind channel panels are fixedly arranged at the outer sides of the wind channel housing supports; The bottom parts of the wind channel housing supports are fixedly connected with a sealing base; The sealing base and the wind channel panels form a shell cavity for assembling the heat dissipation fin plates, the heat dissipation fin plates are arranged in the shell cavity, and the bottom parts of the heat dissipation fin plates are fixedly arranged at the top parts of the sealing base.

3. The enclosed air duct heat sink structure of a high power power converter according to claim 2, wherein, The wind cover comprises a cover shell part, an inner assembling part is integrally formed at the air inlet of the cover shell part, and the inner assembling part is fixedly assembled on the wind channel housing support; An outer assembling part is integrally formed at the air outlet of the cover shell part, and the outer assembling part is assembled on the fan.

4. The enclosed air duct heat sink structure of a high power power converter according to claim 3, wherein, The top part of the inner assembling part is fixedly connected with a support seat mounting frame, and the inner end of the converter circuit mounting support seat is fixedly arranged at the bottom part of the support seat mounting frame.

5. The enclosed air duct heat sink structure of a high power power converter according to claim 3, wherein, The fan comprises a fan housing, and the outer assembling part is arranged at one end part of the fan housing.

6. The enclosed air duct heat sink structure of a high power power converter according to claim 3, wherein, The front and back sides of the inner assembling part are respectively arranged on the wind channel housing supports; The bottom part of the inner assembling part is arranged at the top part of the sealing base.

7. The enclosed air duct heat sink structure of a high power power converter according to claim 5, wherein, The air outlet support is fixedly arranged at the other end part of the fan housing.

8. The enclosed air duct heat sink structure of a high power power converter according to claim 7, wherein, An air outlet is formed in the air outlet support, and a screen is fixedly connected to the air outlet.

9. The enclosed air-duct heat sink structure of a high-power power converter according to claim 1, wherein, A plurality of heat dissipation slot structures are formed in the converter circuit mounting support seat; U-shaped openings are formed in the heat dissipation fin plates and matched with the heat dissipation slot structures.

10. The enclosed air duct heat sink structure for high power power converter of claim 2, wherein, The back sides of the air inlet support are respectively fastened to the end parts of the wind channel housing supports through a plurality of bolts.

Images