Inverter heat dissipation structure of variable frequency generator set

Abstract

The utility model relates to a heat radiation structure of an inverter of a frequency conversion generator set. The heat radiation structure comprises a rack. The double-layer wind scooper structure and the double-layer wind scooper are arranged on the rack; the inverter body is provided with a plurality of heat dissipation ribs, and a heat dissipation air channel is formed between every two adjacent heat dissipation ribs; the double-layer fan cover structure comprises a wind scooper and an air outlet cover integrally formed with the wind scooper, the wind scooper is provided with an air inlet communicated with the air outlet cover, the air outlet cover is provided with an air outlet, and cooling airflow exhausted from the air outlet is blown to a heat dissipation channel of the inverter body at an inclined angle relative to the inverter body. According to the utility model, the air outlet on the air outlet cover and the inverter body are arranged in an inclined manner, and cooling airflow exhausted by the air outlet and the inverter body form an inclined angle and is blown to the heat dissipation channel, so that the windward surface of the heat dissipation channel is increased, the front end and the rear end of the inverter body can be cooled simultaneously, and the cooling effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of generators and relates to a heat dissipation structure for an inverter of a variable-frequency generator set. Background Art

[0002] Variable-frequency generators are commonly used in field operations, power outages and other temporary or emergency situations. Their structure generally includes a frame, a generator, an engine, a control box, an inverter, a muffler, a fuel tank, etc. Variable-frequency generators have relatively high cooling requirements for generators and inverters. The inverter is the most important component of a variable-frequency generator set. During the operation of the generator set, the inverter generates a large amount of heat. If the heat dissipation effect of the inverter is poor, when the temperature of the inverter reaches the set protection value, the inverter will automatically trigger the protection function, resulting in the generator set being unable to operate at a certain rated power for a long time.

[0003] For example, a heat dissipation structure for an inverter of a variable-frequency generator set with the authorization announcement number CN217336281U includes an inverter body, a mounting plate and a wind guide cylinder. This heat dissipation structure for the inverter of the variable-frequency generator set utilizes the negative pressure generated by the rotation of the impeller. By designing the mounting plate and the wind guide cylinder, under the guiding action of the wind guide cylinder, the cooling air flow will blow from the air outlet holes into the heat dissipation air duct, thereby realizing the cooling of the inverter body, effectively reducing the working temperature of the inverter body, and further improving the heat dissipation effect of the inverter body and the performance of the terminal of this variable-frequency generator set.

[0004] However, in the above solution, the wind guide cylinder of this heat dissipation structure is connected to the air outlet holes on the baffle, and the inverter is arranged on the other side of the air outlet holes, so that the cooling air flow enters from one side of the heat dissipation channel and is discharged from the other side along the heat dissipation channel to dissipate heat from the inverter. This causes the temperature of the cooling air flow to rise when it flows into the rear end of the heat dissipation channel, resulting in poor heat dissipation effect on the rear end of the inverter. Summary of the Utility Model

[0005] The purpose of the present utility model is to address the above problems existing in the prior art and propose a heat dissipation structure for an inverter of a variable-frequency generator set.

[0006] The purpose of the present utility model can be achieved by the following technical solutions: A heat dissipation structure for an inverter of a variable-frequency generator set includes a frame; a double-layer wind cover structure, the double-layer wind guide cover is arranged on the frame; an inverter body, multiple heat dissipation ribs are arranged on the inverter body, and a heat dissipation air duct is formed between adjacent two of the heat dissipation ribs; the double-layer wind cover structure includes a wind guide cover and an air outlet cover integrally formed with the wind guide cover, an air inlet communicating with the air outlet cover is opened on the wind guide cover, and an air outlet is arranged on the air outlet cover. The cooling air flow discharged from the air outlet blows towards the heat dissipation channel of the inverter body at an inclined angle.

[0007] In the above-mentioned inverter heat dissipation structure of a variable-frequency generator set, the air outlet hood includes a transition channel communicating with the air guide hood and an air outlet channel. An arc-shaped guiding channel is arranged between the transition channel and the air outlet channel. When the inverter body is located at the front end of the double-layer air hood structure, the arc-shaped guiding channel is used to change the air outlet direction to form a front air outlet.

[0008] In the above-mentioned inverter heat dissipation structure of a variable-frequency generator set, the air outlet hood includes a transition air duct, and the air outlet is arranged on the transition air duct. When the inverter body is located at the rear end of the double-layer air hood structure, the cooling air flow can be discharged from the air outlet along the transition channel to form a rear air outlet.

[0009] In the above-mentioned inverter heat dissipation structure of a variable-frequency generator set, a wind guide plate is arranged on one side of the transition channel, and connecting ribs are arranged between the wind guide plate and the transition channel.

[0010] In the above-mentioned inverter heat dissipation structure of a variable-frequency generator set, a wind baffle is further arranged on the inner side of the air guide hood, and the wind baffle is arranged at the rear end of the air inlet.

[0011] In the above-mentioned inverter heat dissipation structure of a variable-frequency generator set, both sides of the transition channel are inclined outward to be connected with the arc-shaped guiding channel.

[0012] Compared with the prior art, in the present utility model, the air outlet on the air outlet hood is inclined with respect to the inverter body. When the air outlet discharges the cooling air flow, it blows towards the heat dissipation channel of the inverter body at an inclined angle, thereby increasing the wind-receiving surface of the heat dissipation channel, enabling the front and rear ends of the inverter to be cooled simultaneously, and improving the cooling effect. At the same time, the heat dissipation channel is horizontally arranged. After the cooling air flow blows towards the front end of the heat dissipation channel, it can blow along the heat dissipation channel towards the rear end of the heat dissipation channel, thereby performing secondary cooling on the rear heat dissipation channel and further improving the cooling effect. The double-layer air hood structure, with the air guide hood and the air outlet hood integrally formed, can facilitate the manufacture of the double-layer air guide hood and reduce costs. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic structural diagram of the double-layer air hood structure of the present utility model;

[0015] Figure 3 is a side view of the schematic structural diagram of the double-layer air hood structure of the present utility model;

[0016] Figure 4 is a schematic diagram of the air flow direction of the present utility model;

[0017] Figure 5 is a schematic structural diagram of another technical solution of the present utility model;

[0018] Figure 6 is a schematic diagram of another double-layer air duct structure of the present utility model;

[0019] Figure 7 is a schematic diagram of another air flow direction of the present utility model.

[0020] In the figure, 1 is the frame; 2 is the double-layer air duct structure; 21 is the air guide duct; 22 is the air outlet duct; 3 is the air inlet; 4 is the air outlet; 211 is the transition channel; 212 is the air outlet channel; 213 is the arc-shaped guiding channel; 5 is the air guide plate; 6 is the wind baffle; 7 is the inverter body; 8 is the connecting rib. Detailed implementation manners

[0021] The following are specific embodiments of the present utility model and, in conjunction with the accompanying drawings, further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments. Embodiment

[0022] As Figures 1 to 7 shown, a heat dissipation structure for an inverter of a variable-frequency generator set includes a frame 1 and a double-layer air duct structure 2. A double-layer air guide duct 21 is arranged on the frame 1 and the inverter body 7. The inverter body 7 is installed on the frame 1 of the variable-frequency generator set. An inverter is a converter that converts high-frequency AC electrical energy into fixed-frequency and fixed-voltage or frequency-modulated and voltage-regulated alternating current; multiple heat dissipation ribs are arranged on the inverter body 7, and heat dissipation air ducts are formed between adjacent two of the heat dissipation ribs.

[0023] In this embodiment, the double-layer air duct structure 2 includes an air guide duct 21 and an air outlet duct 22 integrally formed with the air guide duct 21. As another solution, the air outlet duct 22 and the air guide duct 21 can also be separate bodies, and the air outlet duct 22 can be fixed to the air guide duct 21 by welding or other fixing methods later. An air inlet 3 communicating with the air outlet duct 22 is opened on the air guide duct 21, and an air outlet 4 is arranged on the air outlet duct 22. The cooling air flow discharged from the air outlet 4 blows towards its heat dissipation channel at an inclined angle with respect to the inverter body 7.

[0024] As Figures 1 to 4 shown, when the inverter body 7 is located at the front end of the double-layer air duct structure 2, the air outlet duct 22 includes a transition channel 211 and an air outlet channel 212 communicating with the air guide duct 21. An arc-shaped guiding channel 213 is arranged between the transition channel 211 and the air outlet channel 212. The arc-shaped guiding channel 213 is used to change the air direction of the air outlet 4, so that the air inlet direction and the air outlet direction of the cooling air flow are opposite, forming front air outlet.

[0025] Further, a wind guide plate 5 is provided on one side of the transition channel 211. The outer end of the wind guide plate 5 is arranged parallel to or obliquely outward from the air outlet channel 212, and is used to increase the air volume discharged from the air outlet 4. A connecting rib 8 is arranged between the wind guide plate 5 and the transition channel 211. The connecting rib 8 is triangular in shape to improve the connection strength.

[0026] When the engine of the variable-frequency generating set operates, it will drive the impeller to rotate and generate negative pressure. The outside air enters the inside of the air guide cover 21 through the pull plate. Part of the air flow is guided to the air outlet 4 under the guiding action of the air inlet 3 between the air outlet cover 22 and the air guide cover 21, and the air outlet direction is changed through the arc-shaped guiding channel 213, so that the cooling air flow can blow towards the inverter. As Figure 4 shown, the arrows in the figure indicate the air flow direction. The air outlet 4 discharges the cooling air flow and blows towards its heat dissipation channel at an inclined angle with the inverter body 7, thereby increasing the wind-receiving surface of the heat dissipation channel, enabling the front and rear ends of the inverter to be cooled simultaneously, and improving the cooling effect; and the heat dissipation channel is horizontally arranged. When the air flow blows towards the front heat dissipation air duct, it can only flow along the heat dissipation air duct. During this process, the cooling air flow can secondary-cool the rear heat dissipation channel, further improving the cooling effect on the inverter.

[0027] As Figures 5 to 7 shown, as another technical solution; when the inverter body 7 is located at the rear end of the double-layer air duct structure 2, the air outlet cover 22 includes a transition air duct, and the air outlet 4 is arranged on the transition air duct. When the inverter body 7 is located at the rear end of the double-layer air duct structure 2, the cooling air flow can be discharged from the air outlet 4 along the transition channel 211 to form rear air outlet.

[0028] When the engine of the variable-frequency generating set operates, it will drive the impeller to rotate and generate negative pressure. The outside air enters the inside of the air guide cover 21 through the pull plate. Part of the air flow is guided to the air outlet 4 under the guiding action of the air inlet 3 between the air outlet cover 22 and the air guide cover 21, so that the cooling air flow can blow towards the inverter. As Figure 7 shown, the arrows in the figure indicate the air flow direction. The air outlet 4 discharges the cooling air flow and blows towards its heat dissipation channel at an inclined angle with the inverter body 7, thereby increasing the wind-receiving surface of the heat dissipation channel, enabling the front and rear ends of the inverter to be cooled simultaneously, and improving the cooling effect.

[0029] Further, a wind baffle 6 is also arranged on the inner side of the air guide cover 21. The wind baffle 6 is arranged at the rear end of the air inlet 3. As Figure 3 shown, the arrow direction is the cooling air flow direction. The arrangement of the wind baffle 6 can enable more cooling air flow to enter the air inlet 3, so as to increase the air volume of the cooling air flow and further improve the cooling effect on the inverter.

[0030] The upper and lower surfaces of the described transition channel 211 are inclined outward, so that the length of the air outlet 4 can be matched with the length of the inverter body 7 as much as possible, so that the cooling air flow can cover all the heat dissipation channels, thereby improving the cooling effect.

[0031] In the present utility model, the air outlet 4 on the air outlet cover 22 is inclined with respect to the inverter body 7. The air outlet 4 blows the cooling air flow at an inclined angle with respect to the inverter body 7 towards its heat dissipation channels, thereby increasing the windward surface of the heat dissipation channels, enabling the front and rear ends of the inverter to be cooled simultaneously, and improving the cooling effect. At the same time, the heat dissipation channels are horizontally arranged. After the cooling air flow blows towards the front end of the heat dissipation channels, it can blow along the heat dissipation channels towards the rear end of the heat dissipation channels, thereby performing secondary cooling on the heat dissipation channels at the rear end and further improving the cooling effect. For the double-layer air duct structure 2, the air guide duct 21 and the air outlet cover 22 are integrally formed, which is convenient for the manufacture of the double-layer air guide duct 21 and reduces costs.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A heat dissipation structure of a variable frequency generator inverter, comprising: Rack (1); A double-layer wind shield structure (2), wherein the double-layer wind guide shield (21) is arranged on the frame (1); The inverter body (7) is provided with a plurality of heat dissipation ribs, and a heat dissipation air duct is formed between two adjacent heat dissipation ribs; the characteristics are: The double-layer wind shield structure (2) comprises an air guide shield (21) and an air outlet shield (22) integrally formed with the air guide shield (21); the air guide shield (21) is provided with an air inlet (3) connected to the air outlet shield (22); the air outlet shield (22) is provided with an air outlet (4); cooling air discharged from the air outlet (4) is blown toward the heat dissipation channel of the inverter body (7) at an inclined angle.

2. The heat dissipation structure of the inverter of the variable frequency generator set according to claim 1, characterized in that: The air outlet cover (22) comprises a transition channel (211) and an air outlet channel (212) which are connected to the air guide cover (21); an arc-shaped guide channel (213) is provided between the transition channel (211) and the air outlet channel (212); when the inverter body (7) is located at the front end of the double-layer air cover structure (2), the arc-shaped guide channel (213) is used to change the wind direction of the air outlet (4) to form front air outlet.

3. The heat dissipation structure of the inverter of the variable frequency generator set according to claim 1, characterized in that: The air outlet hood (22) includes a transition air duct, and the air outlet (4) is arranged on the transition air duct. When the inverter body (7) is located at the rear end of the double-layer air hood structure (2), the cooling air flow can be discharged from the air outlet (4) along the transition channel (211) to form rear air outlet.

4. The heat dissipation structure of the inverter of the variable frequency generator set according to claim 2, characterized in that: An air guide plate (5) is provided on one side of the transition channel (211), and a connecting rib (8) is provided between the air guide plate (5) and the transition channel (211).

5. The heat dissipation structure of the inverter of the variable frequency generator set according to claim 1, characterized in that: A wind shield (6) is also arranged on the inner side of the wind guide cover (21), and the wind shield (6) is arranged at the rear end of the air inlet (3).

6. The heat dissipation structure of the inverter of the variable frequency generator set according to claim 2, characterized in that: Both sides of the transition channel (211) are inclined outwards and connected to the arc-shaped guide channel (213).

Images