Welding machine control box

Abstract

The utility model discloses a welding machine control box which comprises a box body and a bottom plate and is characterized in that a partition plate is arranged in the box body to divide the box body into an upper cavity and a lower cavity, a control loop is installed in the upper cavity, a welding main loop is installed in the lower cavity, the upper cavity of the box body is connected with a front panel assembly, and the bottom plate is located in the lower cavity. The lower chamber of the box body is connected with a lower chamber cover plate, and the lower chamber cover plate is provided with a convex mounting surface. According to the utility model, the convex design of the lower chamber cover plate can increase the volume of the lower chamber, so that the distance between the welding main loop in the lower chamber and the lower chamber cover plate is increased, the heat dissipation of the welding main loop is facilitated, the heat dissipation effect of the welding machine can be improved, and the structure is simple. The box body adopts the design of upper and lower cavities, a control loop and a welding main loop are isolated, then the upper and lower cavities are subjected to heat dissipation in different modes, the upper cavity adopts air natural heat dissipation, and the lower cavity adopts a cooling fan for forced heat dissipation, so that the heat dissipation effect can be improved.

Description

Technical Field

[0001] The utility model relates to a welding machine control box, in particular to a welding machine control box for a power generation welding machine. Background Art

[0002] During outdoor welding construction operations, since there is no mains power supply, a power generation welding machine driven by a power source needs to be used. The power source drives the motor to generate power to supply the welding machine, and the welding machine outputs welding power for welding. The traditional method uses a generator to cooperate with a commercial welding machine for welding; or the generator and the welding machine are integrally designed, sharing a heat dissipation air duct and an installation structure, which is complex in structure and not convenient for assembly and later maintenance.

[0003] Chinese patent document CN202461838U discloses an inverter welding machine, including a chassis, a fan, a radiator and electrical components. The interior of the chassis includes a partition board. The rear of the chassis includes an air inlet, and the front of the chassis includes an air outlet. The partition board includes a horizontal partition board, a first vertical partition board and a second vertical partition board. The horizontal partition board divides the interior of the chassis into upper and lower layers. The first vertical partition board and the second vertical partition board divide the lower layer space of the chassis into a first side compartment, a second side compartment and an intermediate air duct; the rear of the intermediate air duct communicates with the air inlet, and the front communicates with the air outlet; the fan is installed at the rear of the intermediate air duct, and the radiator is arranged in the middle of the intermediate air duct. The utility model can improve the heat dissipation efficiency of the radiator, the overall size of the chassis is smaller, and the electrical components can be arranged in different spaces according to needs for classified protection. In this prior art, the electrical components are separated and arranged in four spaces inside the chassis. Although the overall size of the chassis can be reduced, the heat dissipation effect still needs to be further improved. Summary of the Utility Model

[0004] In order to solve the technical problem that the heat dissipation effect of the welding machine in the prior art needs to be improved, the utility model provides a welding machine control box, including a box body and a bottom plate, characterized in that: a partition board is arranged inside the box body to divide the box body into an upper chamber and a lower chamber. A control circuit is installed in the upper chamber, and a welding main circuit is installed in the lower chamber. The upper chamber of the box body is connected with a front panel assembly. The bottom plate is located in the lower chamber. The lower chamber of the box body is connected with a lower chamber cover plate, and the lower chamber cover plate is provided with a protruding mounting surface.

[0005] In this solution, the protruding design of the lower chamber cover plate can increase the volume of the lower chamber, thereby increasing the distance between the welding main circuit in the lower chamber and the lower chamber cover plate, which is beneficial to the dissipation of the heat of the welding main circuit, and thus can improve the heat dissipation effect of the welding machine, and the structure is simple.

[0006] Preferably, the control loop includes a welding control board, an operation panel, and a welding socket. The welding socket is installed in the upper chamber, and the welding control board and the operation panel are arranged on the front panel assembly. In this solution, the overall devices with less serious heat generation are placed in the upper chamber, and the natural heat dissipation of air can meet the heat dissipation requirements of the upper chamber without setting additional heat dissipation devices, with a simple structure.

[0007] Preferably, air vents are opened on both sides of the lower part of the box body, and a cooling fan is also arranged in the lower chamber. The two air vents are arranged along the flow direction of the cooling fan. In this solution, since the main welding circuit with serious overall heat generation is arranged in the lower chamber, a cooling fan is arranged in the lower chamber to forcibly form cooling air to meet the heat dissipation requirements of the lower chamber, with a simple structure.

[0008] Preferably, the main welding circuit is successively provided with a rectification module, an IGBT module, a fast-recovery module, a main transformer, and a reactor along the air flow direction of the cooling fan. In this solution, each device is set according to the temperature resistance level of the device, and the cooling air dissipates heat from each device step by step in turn, which can make full use of the cooling air and ensure the heat dissipation effect.

[0009] Preferably, a heat dissipation device is also arranged in the lower chamber. The rectification module and the IGBT module are installed on the front side of the heat dissipation device, and the fast-recovery module is installed on the rear side of the heat dissipation device. In this solution, since the rectification module and the IGBT module generate more heat and have a higher temperature during operation, a heat dissipation device is also set to cooperate with the cooling fan to strengthen the heat dissipation effect of the rectification module and the IGBT module and ensure the normal operation of the rectification module and the IGBT module.

[0010] Preferably, the heat dissipation device includes two radiators with opposite heat dissipation teeth. In this solution, the two radiators with opposite heat dissipation teeth can form a closed air duct, which is convenient for the cold air to flow through the heat dissipation teeth of the radiator for efficient and rapid heat dissipation, and is also convenient for the installation and later maintenance of components.

[0011] Preferably, the welding circuit further includes an energy storage filter capacitor. The IGBT module, the rectification module, and the energy storage filter capacitor are connected through a copper bar. In this solution, after connecting the IGBT module, the rectification module, and the energy storage filter capacitor through the copper bar, the connected components form an equipotential, which can effectively reduce energy consumption and busbar ripple and perform efficient filtering; and while the copper bar conducts electricity as a busbar, it also plays a role in supporting the energy storage filter board, which can reduce the support point design and simplify the assembly process.

[0012] Preferably, an epoxy board is arranged on the inner side of the lower chamber cover. In this solution, the epoxy board is used to isolate the lower chamber cover and the conductors in the lower chamber, with a simple structure.

[0013] Preferably, a louver is installed outside the air outlet, and the louver is provided with blades that are inclined downward and outward. In this solution, the louver can effectively block the entry of rainwater while ensuring smooth air inlet and outlet, meeting the requirements of outdoor construction. Moreover, without occupying the internal space of the welding control box cavity, the louver effectively expands the internal space of the lower chamber, ensuring sufficient air inlet space on the air inlet side of the cooling fan.

[0014] Preferably, the cooling fan is connected with a mounting plate, and the mounting plate is installed inside the air outlet. Since the cooling fan is a vulnerable part and needs to be frequently repaired and maintained, in this solution, the mounting plate and the cooling fan form a cooling component. After removing the louver, the cooling fan can be directly taken out for repair, and the disassembly is simple and convenient.

[0015] The utility model has the following beneficial effects:

[0016] 1. The box body adopts an upper and lower cavity design, isolating the control circuits with different heat dissipation requirements from the main welding circuit, and then dissipating heat from the upper and lower chambers in different ways. The upper chamber uses natural air cooling, and the lower chamber uses forced air cooling by a cooling fan, thereby improving the heat dissipation effect.

[0017] 2. The convex design of the lower chamber cover can increase the volume of the lower chamber, thereby increasing the distance between the main welding circuit in the lower chamber and the lower chamber cover, which is beneficial to the dissipation of heat from the main welding circuit, improving the heat dissipation effect of the welding machine, and the structure is simple.

[0018] 3. Each device is set according to the temperature resistance level of the device, and the cooling air sequentially dissipates heat from each device step by step, which can make full use of the cooling air and ensure the heat dissipation effect.

[0019] 4. A heat dissipation device is provided to cooperate with the cooling fan to enhance the heat dissipation effect. The two radiators of the heat dissipation device with their heat dissipation teeth facing each other can form a closed air duct, facilitating the cold air to flow through the heat dissipation teeth of the radiator for efficient and rapid heat dissipation, and also facilitating the installation and later maintenance of components.

[0020] 5. The setting of the copper bar can effectively reduce energy consumption and busbar ripple, and has high-efficiency filtering; and while the copper bar conducts electricity as a busbar, it also plays a role in supporting the energy storage filter board, reducing the design of support points and simplifying the assembly process.

[0021] 6. The louver can effectively block the entry of rainwater while ensuring smooth air inlet and outlet, meeting the requirements of outdoor construction. Moreover, without occupying the internal space of the welding control box cavity, the louver effectively expands the internal space of the lower chamber, ensuring sufficient air inlet space on the air inlet side of the cooling fan.

[0022] 7. The mounting plate and the cooling fan form a cooling assembly. After removing the shutter, the cooling fan can be directly taken out for maintenance, and the disassembly is simple and convenient. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of an embodiment of a welding machine control box of the present utility model;

[0024] Figure 2 is Figure 1 front view of;

[0025] Figure 3 is the structural schematic diagram ① of the welding machine control box;

[0026] Figure 4 is the structural schematic diagram ② of the welding machine control box;

[0027] Figure 5 is the structural schematic diagram ③ of the welding machine control box. Detailed Description of the Invention

[0028] The following is a further detailed description through specific embodiments:

[0029] The reference numerals in the drawings of the specification include: box body 1, front panel assembly 2, lower chamber cover 3, shutter 4, partition 5, copper bar 6, bottom plate 7, cooling fan 8, welding socket 9, mounting seat 10, mounting plate 11, rectifier module 12, IGBT module 13, energy storage filter board 14, energy storage filter capacitor 15, heat dissipation device 16, fast recovery module 17, main transformer 18, commutation inductor 19, reactor 20.

[0030] The embodiment is basically as shown in the attached Figures 1 - 5 figures: A welding machine control box includes a box body 1 and a bottom plate 7. The two ends, front and rear sides of the bottom plate 7 are formed with bending for strengthening, and the periphery is open. Welding nuts for connecting with the box body 1 are designed at the bending parts of the two ends, front and rear sides of the bottom plate 7.

[0031] A partition 5 is arranged in the box body 1 to divide the box body 1 into an upper chamber and a lower chamber, and the bottom plate 7 is located in the lower chamber. After the box body 1 and the bottom plate 7 are connected by welding nuts around, a complete upper and lower two-chamber structure is formed.

[0032] The upper chamber of the box body 1 is connected with a front panel assembly 2. The front panel assembly 2 includes a current thrust starting arc potentiometer, a welding mode switch, a VRD switch, a start switch, an AC circuit breaker, a remote control socket, a current display meter, a VFT display meter, various alarm indicator lights, etc. After the front panel assembly 2 is installed on the upper chamber of the box body 1, a complete and sealed upper chamber is formed.

[0033] The lower chamber of the box body 1 is connected with a lower chamber cover plate 3. The lower chamber cover plate 3 is provided with a convex mounting surface, which increases the volume of the lower chamber and the distance between the conductor in the lower chamber and the cover plate. An epoxy board is designed on the inner side of the lower chamber cover plate 3 to isolate the lower chamber cover plate 3 and the conductor in the lower chamber. The epoxy board is fastened to the inside of the lower chamber cover plate 3 by insulating nylon nuts.

[0034] A control circuit is installed in the upper chamber. The control circuit includes a welding control board, an operation panel and a welding socket 9. The welding socket 9 is separately installed in the upper chamber through a mounting seat 10, while the welding control board and the operation panel are arranged on the front panel assembly 2. Since the welding current is relatively large, the welding socket 9 needs to be connected to the welding main circuit through a thick cable. Therefore, the welding socket 9 is independently arranged on the mounting seat 10 and fixed to the upper chamber by bolts. The front panel assembly 2 makes an avoidance through an opening with the welding socket 9, so that there is no direct connection between the welding socket 9 and the front panel assembly 2, which is convenient for the disassembly of the front panel assembly 2 and facilitates the disassembly and maintenance of the upper chamber.

[0035] A welding main circuit is installed in the lower chamber, and the welding main circuit is arranged on the bottom plate 7. Air vents are opened on both sides of the lower part of the box body 1, and a cooling fan 8 is also arranged in the lower chamber. The two air vents are arranged along the flow direction of the cooling fan. A louver 4 is installed outside the air vents, and the louver 4 is provided with blades inclined outward and downward. The cooling fan 8 is connected with a mounting plate 11 by bolts, and the mounting plate 11 is installed outside the air vents.

[0036] The welding main circuit is successively provided with a rectification module 12, an IGBT module 13, a filter energy storage capacitor 15, a fast recovery module 17, a main transformer 18, a commutation inductor 19 and a reactor 20 along the air flow direction of the cooling fan 8. The filter energy storage capacitor 15 is arranged on a filter energy storage plate 14. The IGBT module 13, the rectification module 12 and the filter energy storage plate 14 are connected by a copper bar 6. Each connected component forms an equipotential, which can effectively reduce energy consumption and bus ripple and achieve efficient filtering. While the copper bar 6 conducts electricity as a bus, it also plays a role in supporting the filter energy storage plate 14, which can reduce the design of support points and simplify the assembly process. The fast recovery module 17 is a fast recovery diode module.

[0037] A heat dissipation device 16 is also arranged in the lower chamber. The rectification module 12 and the IGBT module 13 are installed on the front side of the heat dissipation device 16, and the fast recovery module 17 is installed on the rear side of the heat dissipation device 16. Among them, the heat dissipation device 16 is an aluminum profile heat dissipation device 16, and the heat dissipation device 16 includes two radiators with opposite heat dissipation teeth. The heat dissipation teeth of the two radiators are arranged opposite to each other to form a closed air duct, which is convenient for cold air to flow through the heat dissipation teeth of the radiator and dissipate heat from the components efficiently and quickly. The positions of the front and rear substrate are open, which is also convenient for the installation and later maintenance of the components.

[0038] As Figure 3As shown, from left to right, the temperature resistance level of the devices gradually increases. The cooling air makes full use of the principle of heat dissipation step by step and dissipates heat from the devices in turn. The IGBT module 13 and the fast-recovery module 17 are important devices in the entire welding main circuit. The substrate temperature cannot exceed 90°C, and they generate relatively serious heat during operation. Higher temperatures will result in a lower overall conversion efficiency. Therefore, they are located at the very front of the air duct. The cooling air is heated by the radiator and then flows through the main transformer 18. The main transformer 18 is wound with enameled wire, and the maximum temperature of the F-class insulation can reach 155°C. The cooling air is heated again. After leaving the main transformer 18, the cooling air flows through the commutation inductor 19 and the reactor 20 to dissipate heat from the commutation inductor 19 and the reactor 20. The reactor 20 is wound with copper bars / aluminum bars and silicon steel sheet cores, and the overall temperature resistance can reach 200°C.

[0039] The above are only embodiments of the present invention. Common general knowledge such as the specific structures and characteristics known in the art are not described in detail here. Those of ordinary skill in the art know all the common general knowledge in the technical field to which the present invention belongs before the filing date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application and combined with their own abilities, perfect and implement this solution. Some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A welding machine control box, comprising a box body and a bottom plate, characterized in that: A partition is provided inside the box body to divide the box body into an upper chamber and a lower chamber. A control circuit is installed in the upper chamber, and a welding main circuit is installed in the lower chamber. The upper chamber of the box body is connected to a front panel assembly. The bottom plate is located in the lower chamber. The lower chamber of the box body is connected to a lower chamber cover plate, and the lower chamber cover plate is provided with an outwardly convex mounting surface.

2. The welding machine control box according to claim 1, characterized in that: The control circuit includes a welding control board, an operation panel, and a welding socket. The welding socket is installed in the upper chamber, and the welding control board and the operation panel are arranged on the front panel assembly.

3. The welding machine control box according to claim 1 or 2, characterized in that: Air vents are provided on both sides of the lower part of the box body, and a cooling fan is further provided in the lower chamber. The two air vents are arranged along the flow direction of the cooling fan.

4. The welding machine control box according to claim 3, characterized in that: The welding main circuit is sequentially provided with a rectification module, an IGBT module, a fast-recovery module, a main transformer, and a reactor along the air flow direction of the cooling fan.

5. The welding machine control box according to claim 4, characterized in that: A heat dissipation device is further provided in the lower chamber. The rectification module and the IGBT module are installed on the front side of the heat dissipation device, and the fast-recovery module is installed on the rear side of the heat dissipation device.

6. The welding machine control box according to claim 5, characterized in that: The heat dissipation device includes two radiators with opposite heat dissipation teeth.

7. The welding machine control box according to claim 6, characterized in that: The welding circuit further includes an energy storage filter capacitor, and the IGBT module, the rectification module, and the energy storage filter capacitor are connected by copper bars.

8. The welding control box according to claim 7, wherein: An epoxy board is provided on the inner side of the lower chamber cover plate.

9. The welding control box according to claim 3, wherein: A shutter is installed outside the air vent, and the shutter is provided with blades inclined downward and outward.

10. The welding control box according to claim 9, characterized in that: The cooling fan is connected to a mounting plate, and the mounting plate is installed on the inner side of the air vent.

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