Air cooling heat dissipation structure of welding power source

Abstract

The invention discloses an air cooling heat dissipation structure of a welding power source, the welding power source is provided with an air inlet and an air outlet, the air cooling heat dissipation structure comprises an axial flow fan, an air collection cavity and a heat dissipation air channel, the axial flow fan is arranged at the air outlet of the welding power source, the outlet end of the air collection cavity is connected with the axial flow fan, and the air outlet end of the air collection cavity is connected with the heat dissipation air channel. The heat dissipation aluminum blocks are arranged in the air collection cavity and used for guiding airflow to flow evenly so that the airflow can evenly pass through the air channel formed by the heat dissipation aluminum blocks, and the heat dissipation air channel is arranged at the inlet end of the air collection cavity and used for reducing the temperature of the heat dissipation airflow. Through mutual cooperation of the axial flow fan, the gas collection cavity and the heat dissipation air channel, the heat dissipation effect of the air cooling heat dissipation structure on the welding power source is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding power sources, and particularly to an air-cooled heat dissipation structure for a welding power source. Background Art

[0002] A welding power source is a device used to supply electrical energy to a welding equipment. It converts the power supply through a series of circuits and controllers into the current and voltage suitable for the welding process. The main function of the welding power source is to provide stable electrical energy to meet the arc energy required during the welding process. The heat dissipation of the welding power source is very important because a large amount of heat is generated during the welding process. A reasonable heat dissipation design can ensure the long-term stable operation of the power source and avoid damage caused by overheating. Most existing welding power sources install a cooling fan at the air inlet to suck external air into the housing of the welding power source, and copper heat dissipation fins are installed inside the housing to reduce the temperature of the heat dissipation air flow and improve the overall heat dissipation efficiency. However, its overall heat dissipation effect cannot meet the heat dissipation requirements of high-power welding power sources, and the heat dissipation fins are made of copper, resulting in a high production cost. Summary of the Invention

[0003] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] The technical problem to be solved by the present invention is how to improve the heat dissipation effect of the air-cooled heat dissipation structure on the welding power source.

[0005] To solve the above technical problem, the present invention provides the following technical solution: An air-cooled heat dissipation structure for a welding power source, an air inlet and an air outlet are provided on the welding power source. The air-cooled heat dissipation structure includes an axial flow fan, a gas collecting cavity, and a heat dissipation air duct. The axial flow fan is arranged at the air outlet of the welding power source. The outlet end of the gas collecting cavity is connected to the axial flow fan for guiding the air flow to flow evenly, so that the air flow can evenly pass through the air duct formed by heat dissipation aluminum blocks. The heat dissipation air duct is arranged at the inlet end of the gas collecting cavity for reducing the temperature of the heat dissipation air flow.

[0006] As a preferred solution of the air-cooled heat dissipation structure for the welding power source of the present invention, wherein: the heat dissipation air duct includes a first heat dissipation aluminum block, a second heat dissipation aluminum block, and a sealing member. The first heat dissipation aluminum block and the second heat dissipation aluminum block are symmetrically arranged through the sealing member to form a complete cooling and heat dissipation flow channel. A plurality of rib plates are horizontally and evenly arranged on the inner sides of the first heat dissipation aluminum block and the second heat dissipation aluminum block.

[0007] As a preferred embodiment of the air-cooling structure of the welding power source according to the present invention, wherein: the spacing width W of the rib plate is 8 ± 0.5 mm, the height H of the rib plate is 44 ± 2 mm, and the height H of the rib plate is 5.2 to 5.8 times the spacing width W of the rib plate, that is, the aspect ratio H / W = 5.5 ± 0.3, so as to balance the heat conduction efficiency and the air flow resistance, enabling the rib plate to fully take away sufficient heat, thereby achieving the best heat dissipation effect.

[0008] As a preferred embodiment of the air-cooling structure of the welding power source according to the present invention, wherein: the rib plate adopts a tapered structure with a thickened root, the root thickness of the rib plate is 3 to 3.5 mm, and the top thickness is 1 to 1.3 mm, which not only reduces the resistance of the air flow, but also increases the surface area of the rib plate, that is, increases the heat dissipation area.

[0009] As a preferred embodiment of the air-cooling structure of the welding power source according to the present invention, wherein: the air collecting cavity is assembled after being integrally injection-molded with heat-resistant industrial plastic. The air collecting cavity adopts a split design, which not only reduces the production cost, but also increases the maintainability of the air collecting cavity.

[0010] As a preferred embodiment of the air-cooling structure of the welding power source according to the present invention, wherein: both the first heat dissipation aluminum block and the second heat dissipation aluminum block are formed by aluminum alloy extrusion, which not only reduces the production cost of the heat dissipation aluminum block, but also improves the production efficiency.

[0011] As a preferred embodiment of the air-cooling structure of the welding power source according to the present invention, wherein: the seal is a heat-resistant and insulating mica sheet to ensure the sealing of the entire heat dissipation air duct.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. Through the mutual cooperation among the axial flow fan, the air collecting cavity and the heat dissipation air duct, the heat dissipation effect of the air-cooling structure on the welding power source is improved;

[0014] 2. The heat dissipation aluminum block adopts the aluminum alloy extrusion forming process, which not only reduces the manufacturing cost, but also improves the production efficiency;

[0015] 3. Through the optimized design of the spacing width and height of the rib plate, the thermal resistance is reduced by 35%, and the measured heat dissipation efficiency is 0.73 °C / W, with lower energy consumption and higher efficiency compared with other products;

[0016] 4. Through the integration connection of the axial flow fan and the heat dissipation aluminum block by the air collecting cavity, the turbulence is reduced, the uniformity of the wind speed is improved, and thus the heat dissipation efficiency of the air-cooling is improved;

[0017] 5. The air collecting cavity adopts a split structure, which reduces the cost of the injection mold, that is, the production and manufacturing cost, and is also convenient for later maintenance and repair. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0019] Figure 1 It is a schematic diagram of the air-cooled heat dissipation structure of the welding power source and the installation structure of the welding power source.

[0020] Figure 2 It is a schematic diagram of the overall structure of the air-cooled heat dissipation structure of the welding power source.

[0021] Figure 3 It is a schematic diagram of the split structure of the air-cooled heat dissipation structure of the welding power source.

[0022] Figure 4 It is a three-dimensional structure diagram of the first heat dissipation aluminum block of the air-cooled heat dissipation structure of the welding power source.

[0023] Figure 5 It is a side view of the first heat dissipation aluminum block of the air-cooled heat dissipation structure of the welding power source.

[0024] Figure 6 It is a schematic diagram of the structure of the air collection cavity of the air-cooled heat dissipation structure of the welding power source.

[0025] Figure 7 It is a schematic diagram of the structure of the air collection cavity of the air-cooled heat dissipation structure of the welding power source from another angle.

[0026] Figure 8 It is the simulation of the height-width ratio of the rib plate and the heat conduction temperature Figure 1 。

[0027] Figure 9 It is the simulation of the height-width ratio of the rib plate and the heat conduction temperature Figure 2 。

[0028] Figure 10 It is a simulation curve graph of the height-width ratio of the rib plate and the heat conduction temperature.

[0029] Figure 11 It is a simulation curve graph of the height-width ratio of the rib plate and the gas flow resistance.

[0030] In the figure: 1. Welding power source; 11. Air inlet; 12. Air outlet; 2. Axial flow fan; 3. Air collection cavity; 4. Heat dissipation air duct; 41. First heat dissipation aluminum block, 42. Second heat dissipation aluminum block; 43. Sealing member; 44. Rib plate. Detailed Embodiments

[0031] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific embodiments of the present invention will be provided in conjunction with the accompanying drawings of the specification.

[0032] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0033] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that excludes other embodiments.

[0034] Embodiment

[0035] Referring to Figures 1 to 11 , this embodiment provides an air-cooled heat dissipation structure for a welding power source. An air inlet 11 and an air outlet 12 are provided on the welding power source 1. The air-cooled heat dissipation structure includes an axial flow fan 2, a gas collecting cavity 3, and a heat dissipation air duct 4. The axial flow fan 2 is arranged at the air outlet 12 of the welding power source 1. The outlet end of the gas collecting cavity 3 is connected to the axial flow fan 2 for guiding the air flow to flow evenly. The heat dissipation air duct 4 is arranged at the inlet end of the gas collecting cavity 3 for reducing the temperature of the heat dissipation air flow.

[0036] The air-cooled heat dissipation structure in this embodiment is mainly applied to high-power welding power sources 1. An air outlet 12 and an air inlet 11 are respectively arranged on the left and right sides of the welding power source 1. This air-cooled heat dissipation structure is mainly composed of an axial flow fan 2, a gas collecting cavity 3, and a heat dissipation air duct 4. The axial flow fan 2, the gas collecting cavity 3, and the heat dissipation air duct 4 are integrally connected. Specifically, the axial flow fan 2 is fixedly installed at the air outlet 12 of the welding power source 1. The axial flow fan 2 blows air outwards, causing a negative pressure area to form inside the welding power source 1. The external cold air is evenly sucked into the inside of the welding power source 1 to efficiently dissipate heat from the welding power source 1. Moreover, compared with installing the heat dissipation fan at the air inlet 11, the noise generated by fixedly installing the axial flow fan 2 at the air outlet 12 of the welding power source 1 in this embodiment is smaller. A gas collecting cavity 3 is fixedly installed at the air inlet end of the axial flow fan 2 for guiding the air flow to flow evenly, enabling the air flow to pass evenly through the air duct formed by the heat dissipation aluminum blocks along the gaps of the rib plates 44, which plays a role in optimizing the heat dissipation air duct 4. A heat dissipation air duct 4 is fixedly installed at the inlet end of the gas collecting cavity 3 to reduce the temperature of the heat dissipation air flow through the heat dissipation air duct 4, thereby improving the heat dissipation effect of the air-cooled heat dissipation structure on the welding power source 1. This embodiment adopts a high-efficiency heat dissipation structure of forced air cooling with negative pressure diversion to meet the heat dissipation requirements of high-power welding power sources 1.

[0037] Specifically, the heat dissipation air duct 4 includes a first heat dissipation aluminum block 41, a second heat dissipation aluminum block 42 and a seal 43. The first heat dissipation aluminum block and the second heat dissipation aluminum block are symmetrically arranged through the seal to form a complete cooling and heat dissipation flow channel. A plurality of rib plates 44 are horizontally and uniformly arranged on the inner sides of the first heat dissipation aluminum block 41 and the second heat dissipation aluminum block 42.

[0038] The heat dissipation air duct 4 in this embodiment is mainly composed of a first heat dissipation aluminum block 41, a second heat dissipation aluminum block 42 and a seal 43. The first heat dissipation aluminum block 41, the second heat dissipation aluminum block 42 and the seal 43 are integrally connected. Specifically, the first heat dissipation aluminum block 41 and the second heat dissipation aluminum block 42 are integrally in a cuboid structure. The first heat dissipation aluminum block 41 and the second heat dissipation aluminum block 42 are symmetrically arranged. Seals 43 are symmetrically installed on the upper and lower sides of the first heat dissipation aluminum block 41 and the second heat dissipation aluminum block 42 so that the first heat dissipation aluminum block 41, the second heat dissipation aluminum block 42 and the seal 43 form a complete cooling and heat dissipation flow channel to reduce the temperature of the heat dissipation air. A number of rib plates 44 are horizontally and uniformly arranged on the inner sides of the first heat dissipation aluminum block 41 and the second heat dissipation aluminum block 42, thereby further improving the heat dissipation effect of the heat dissipation air duct 4.

[0039] Further, the interval width W of the rib plate 44 is 8 ± 0.5 mm, the height H of the rib plate 44 is 44 ± 2 mm, the height H of the rib plate 44 is 5.2 - 5.8 times the interval width W of the rib plate 44, that is, the aspect ratio H / W = 5.5 ± 0.3.

[0040] In this embodiment, by designing the interval width W of the rib plate 44 to be 7.5 - 8.5 mm, the height H of the rib plate 44 to be 42 - 46 mm, the height H of the rib plate 44 to be 5.2 - 5.8 times the interval width W of the rib plate 44, that is, the aspect ratio H / W = 5.5 ± 0.3. Preferably, in this embodiment, by designing the aspect ratio H / W to be 5.5, the heat conduction efficiency and the air flow resistance are balanced, thereby achieving the best heat dissipation effect. As Figures 8 to 11 shown, through a large number of simulation practices, it can be known that when the aspect ratio H / W = 5.5, both the heat conduction temperature of the rib plate 44 and the gas flow resistance through the gap of the rib plate 44 are at the lowest values. The rib plate 44 structure adopted in this embodiment can reduce the thermal resistance by 35%. The measured heat dissipation efficiency is 0.73 °C / W, with lower energy consumption and higher heat dissipation efficiency compared to other products.

[0041] Further, the rib plate 44 adopts a gradually changing structure with a thickened root. The root thickness of the rib plate 44 is 3 - 3.5 mm, and the top thickness is 1 - 1.3 mm.

[0042] In this embodiment, the rib plate 44 is designed as a tapered structure with a thickened root, that is, the size of the rib plate 44 gradually decreases from the root to the top. Specifically, the root thickness of the rib plate 44 is 3 - 3.5 mm, and the top thickness is 1 - 1.3 mm. Preferably, in this embodiment, the root thickness of the rib plate 44 is designed to be 3.5 mm, and the top thickness is designed to be 1.3 mm. This not only reduces the air flow resistance but also increases the surface area of the rib plate 44, that is, increases the heat dissipation area, thereby further improving the heat dissipation effect of the air-cooled heat dissipation structure on the welding power source 1.

[0043] Furthermore, the air collection cavity 3 is assembled after being integrally injection-molded with heat-resistant industrial plastic.

[0044] In this embodiment, the air collection cavity 3 is designed as a split structure and assembled after being injection-molded with heat-resistant industrial plastic. This not only reduces the production cost of the air collection cavity 3 but also increases the maintainability of the air collection cavity 3 for later maintenance and repair.

[0045] Furthermore, both the first heat dissipation aluminum block 41 and the second heat dissipation aluminum block 42 are formed by aluminum alloy extrusion.

[0046] In this embodiment, both the first heat dissipation aluminum block 41 and the second heat dissipation aluminum block 42 are formed by aluminum alloy extrusion. Aluminum alloy is used instead of the original copper to reduce the cost of raw materials, thereby reducing the production cost of the heat dissipation aluminum block. Moreover, using aluminum alloy for manufacturing also facilitates the use of the extrusion molding process to manufacture the heat dissipation aluminum block. This embodiment adopts the aluminum alloy extrusion molding process, which improves the processing efficiency and thus the production efficiency of the heat dissipation aluminum block.

[0047] Specifically, the seal 43 is a heat-resistant and insulating mica sheet.

[0048] In this embodiment, by using a heat-resistant and insulating mica sheet as the seal 43, the airtightness of the entire heat dissipation air duct 4 is ensured.

[0049] During use, the axial flow fan 2 at the air outlet 12 of the welding power source 1 is started. The axial flow fan 2 blows air outwards, creating a negative pressure area inside the welding power source 1. Cold air from the outside is evenly sucked into the inside of the welding power source 1 to achieve rapid heat dissipation of the welding power source 1, thereby improving the heat dissipation effect of the air-cooled heat dissipation structure on the welding power source 1. The axial flow fan 2 blowing air outwards causes the high-temperature airflow inside the welding power source 1 to enter the heat dissipation duct 4 and flow through the gaps between the ribs 44 on the inner sides of the first heat dissipation aluminum block 41 and the second heat dissipation aluminum block 42. The ribs 44 can rapidly cool the heat dissipation airflow, further improving the heat dissipation effect of the air-cooled heat dissipation structure on the welding power source 1. And during this process, the air collecting cavity 3 at the air inlet end of the axial flow fan 2 can guide the heat dissipation airflow to flow evenly along the gaps between the ribs 44, so as to better rapidly cool the heat dissipation airflow, thereby improving once again the heat dissipation effect of the air-cooled heat dissipation structure on the welding power source 1.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An air-cooled heat dissipation structure for a welding power source, wherein an air inlet (11) and an air outlet (12) are provided on the welding power source (1), and it is characterized in that: The air-cooled heat dissipation structure includes an axial flow fan (2), a gas collecting cavity (3) and a heat dissipation air duct (4). The axial flow fan (2) is arranged at the air outlet (12) of the welding power source (1). The outlet end of the gas collecting cavity (3) is connected to the axial flow fan (2) for guiding the air flow to flow evenly. The heat dissipation air duct (4) is arranged at the inlet end of the gas collecting cavity (3) for reducing the temperature of the heat dissipation air flow.

2. The air-cooled heat dissipation structure of the welding power source according to claim 1, wherein: The heat dissipation air duct (4) includes a first heat dissipation aluminum block (41), a second heat dissipation aluminum block (42) and a seal (43). The first heat dissipation aluminum block (41) and the second heat dissipation aluminum block (42) are symmetrically arranged through the seal (43) to form a complete cooling and heat dissipation flow channel. A plurality of rib plates (44) are horizontally and evenly arranged on the inner sides of the first heat dissipation aluminum block (41) and the second heat dissipation aluminum block (42).

3. The air-cooled heat dissipation structure of the welding power source according to claim 2, characterized in that: The spacing width W of the rib plates (44) is 8 ± 0.5 mm, and the height H of the rib plates (44) is 44 ± 2 mm. The height H of the rib plates (44) is 5.2 to 5.8 times the spacing width W of the rib plates (44), that is, the aspect ratio H / W = 5.5 ± 0.

3.

4. The air-cooled heat dissipation structure of the welding power source according to claim 2, wherein: The rib plates (44) adopt a gradually changing structure with a thickened root. The root thickness of the rib plates (44) is 3 to 3.5 mm, and the top thickness is 1 to 1.3 mm.

5. The air-cooling heat dissipation structure of the welding power source according to claim 1, wherein: The gas collecting cavity (3) is assembled after being integrally injection molded with heat-resistant industrial plastic.

6. The air-cooled heat dissipation structure of the welding power source according to claim 2, wherein: Both the first heat dissipation aluminum block (41) and the second heat dissipation aluminum block (42) are formed by aluminum alloy extrusion.

7. The air-cooled heat dissipation structure of the welding power source according to claim 2, wherein: The seal (43) is a heat-resistant and insulating mica sheet.

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