Electric welding machine

Abstract

The utility model provides an electric welding machine which comprises an outer shell and a main circuit board, the main circuit board is fixedly connected among three sides of the inner wall of the outer shell, an IGBT radiator is installed on the front face of the main circuit board, a circuit breaker is installed on one side of the inner wall of the outer shell, an electrolytic capacitor is installed on the front face of the main circuit board and located under the IGBT radiator, and the circuit breaker is connected with the electrolytic capacitor. Three connecting pieces are sequentially installed on the front face of the main circuit board and located on one side of the IGBT radiator from top to bottom, a control panel penetrates through the other side of the shell, and a first panel connector and a second panel connector are sequentially installed on one side of the control panel from bottom to top. The beneficial effects of the utility model are that the heat dissipation fan is started to accelerate the ventilation and heat dissipation of the electrical components in the housing from the heat dissipation window at the side surface of the housing, thereby improving the heat dissipation effect of the heat dissipation of the electrical components in the housing, and improving the use safety of the heat dissipation fan through the protective net. And external foreign matters are prevented from being sucked into the cooling fan, and the safety of the working environment of the electric welding machine is improved.

Description

Technical Field

[0001] This utility model is an electric welding machine, belonging to the field of electric welding equipment. Background Technology

[0002] An electric welding machine is a device used for welding operations. It uses electrical energy to heat metal materials to a molten state, and then uses the molten metal to fill or join workpieces. An electric welding machine mainly consists of a power supply section and a welding section. The power supply section typically consists of a transformer, rectifier, or inverter, used to convert the input electrical energy into a current type suitable for welding. Depending on the welding process and application requirements, electric welding machines can use different power supply types, such as DC welding machines and AC welding machines, or DC inverter welding machines and AC inverter welding machines, etc.

[0003] In the existing technology, there are many electrical components inside the welding machine. During the operation of the welding machine, a lot of heat energy is generated inside. In order to facilitate the normal operation of the electrical components, targeted heat sinks are installed at different electrical components. However, the internal ventilation effect is still not ideal, which causes hot air to remain inside the welding machine and reduces the heat dissipation effect inside the welding machine.

[0004] In summary, this utility model provides an electric welding machine to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a welding machine to solve the problem mentioned in the background art that the poor ventilation of the environment where the heat sink of the internal electrical components of the welding machine is located affects the normal heat exchange of the heat sink, thereby reducing the heat dissipation effect of the internal electrical components of the welding machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A welding machine includes a housing and a main circuit board. The main circuit board is fixedly connected to three sides of the inner wall of the housing. An IGBT heat sink is mounted on the front of the main circuit board. A circuit breaker is mounted on one side of the inner wall of the housing. An electrolytic capacitor is mounted on the front of the main circuit board directly below the IGBT heat sink. Three connecting pieces are mounted sequentially from top to bottom on the front of the main circuit board and on one side of the IGBT heat sink. A control panel extends through the other side of the housing. A first panel connector and a second panel connector are mounted sequentially from bottom to top on one side of the control panel. A secondary rectifier heat sink is mounted on the front of the main circuit board at the bottom of the inner wall of the housing. A connector is electrically connected between the secondary rectifier heat sink and the first panel connector of the control panel. A high-frequency transformer is mounted on the front of the main circuit board and on one side of the electrolytic capacitor.

[0007] Furthermore, a heat dissipation window is provided at the bottom of one side of the outer casing, and a protective net is fixedly connected to one side of the outer casing and the side located at the heat dissipation window. A fixing plate is fixedly connected to the front of the outer casing by screws.

[0008] Furthermore, a cooling fan is fixedly connected to one side of the inner wall of the outer casing and the other side of the heat dissipation window, and threaded holes are provided on the sides of the outer casing to cooperate with the cooling fan and the protective net for fixed connection.

[0009] Furthermore, three rectifier bridges are installed on the front side of the main circuit board 1 and on one side of the inner wall of the housing, and each of the three rectifier bridges is equipped with an aluminum heat sink.

[0010] Furthermore, the high-frequency transformer is electrically connected to the second panel connector via a wire, and the main circuit board is electrically connected to the control panel on the casing via a wire.

[0011] Furthermore, a display and a current adjustment potentiometer are installed sequentially from front to back on the side of the control panel on the other side of the housing and above the second panel connector.

[0012] Furthermore, the main circuit board is electrically connected to the circuit breaker via three connecting tabs.

[0013] The beneficial effects of this utility model are:

[0014] By activating the cooling fan, the electrical components inside the casing are ventilated and cooled more quickly through the heat dissipation window on the side of the casing. This improves the heat dissipation effect of the heat sinks for the internal electrical components. The protective net increases the safety of the cooling fan and prevents foreign objects from being sucked into the cooling fan, thus improving the safety of the welding machine's working environment.

[0015] By turning on the power supply of the main circuit board, the welding machine is controlled through the control panel. During the operation of the welding machine, the IGBT heat sink installed above the electrolytic capacitor can quickly dissipate heat from the top of the electrolytic capacitor. The secondary rectifier heat sink can dissipate heat from the bottom of the electrolytic capacitor. Through dual heat dissipation, the heat dissipation effect and efficiency of the electrolytic capacitor inside the welding machine are effectively improved. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0017] Figure 1 This is a three-dimensional schematic diagram of the structure of an electric welding machine according to the present invention;

[0018] Figure 2 for Figure 1 A schematic 3D view of the IGBT heatsink structure shown.

[0019] Figure 3 for Figure 1 A three-dimensional schematic diagram of the outer shell shown;

[0020] Figure 4 for Figure 1 The diagram shows a schematic side sectional view of the outer casing.

[0021] Figure 5 for Figure 1 A three-dimensional schematic diagram of the circuit breaker shown.

[0022] Figure 6 for Figure 1 The diagram shows a three-dimensional representation of the connector's structure.

[0023] In the diagram: 1. Main circuit board; 2. IGBT heat sink; 3. Circuit breaker; 4. Housing; 5. Cooling fan; 6. Protective mesh; 7. Screw; 8. Mounting plate; 9. Electrolytic capacitor; 10. Connector; 11. High-frequency transformer; 12. Current adjustment potentiometer; 13. Display; 14. First panel connector; 15. Connecting piece; 16. Secondary rectifier heat sink; 17. Second panel connector. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] Please see Figure 1-6This utility model provides a technical solution: an electric welding machine, including a housing 4 and a main circuit board 1. The main circuit board 1 is fixedly connected between three sides of the inner wall of the housing 4. An IGBT heat sink 2 is installed on the front of the main circuit board 1. A circuit breaker 3 is installed on one side of the inner wall of the housing 4. An electrolytic capacitor 9 is installed on the front of the main circuit board 1 and directly below the IGBT heat sink 2. Three connecting pieces 15 are installed from top to bottom on the front of the main circuit board 1 and on one side of the IGBT heat sink 2. A control panel extends through the other side of the housing 4. A first panel connector 14 and a second panel connector 17 are installed from bottom to top on one side of the control panel. A secondary rectifier is installed on the front of the main circuit board 1 and at the bottom of the inner wall of the housing 4. Heat sink 16 is electrically connected to the first panel connector 14 of the control panel via connector 10. A high-frequency transformer 11 is installed on the front of the main circuit board 1, located to one side of the electrolytic capacitor 9. IGBT heat sink 2 is a heat dissipation device, primarily used to dissipate heat from IGBT devices. IGBTs are high-performance power semiconductor devices commonly used in various power conversion and power control applications, such as power electronic equipment, drives, inverters, and motor controllers. By installing IGBT heat sink 2 above the electrolytic capacitor 9, rapid heat dissipation can be achieved during the operation of the welding machine. Secondary rectifier heat sink 16 is a device used for heat dissipation and cooling of the secondary rectifier. Secondary rectifiers are commonly used in AC power supplies or frequency converters and other power equipment to convert AC power to DC power for the load. However, this process generates heat. To maintain the normal operating temperature of the secondary rectifier and prevent overheating damage, heat dissipation measures are required. The secondary rectifier heat sink 16 is a commonly used heat dissipation device.

[0026] Please see Figure 3-4 A heat dissipation window is provided on the bottom of one side of the outer casing 4. A protective net 6 is fixedly connected to one side of the outer casing 4 and the side of the heat dissipation window. A fixing plate 8 is fixedly connected to the front of the outer casing 4 by screws 7. A cooling fan 5 is fixedly connected to one side of the inner wall of the outer casing 4 and the other side of the heat dissipation window. Threaded holes are provided on the sides of the outer casing 4 to cooperate with the cooling fan 5 and the protective net 6 for fixed connection. The protective net 6 can increase the safety of the cooling fan 5 and prevent foreign objects from being sucked into the cooling fan 5, thereby improving the safety of the welding machine's working environment. The cooling fan 5 and the protective net 6 are fixedly connected to the outer casing 4 by bolts and threaded holes.

[0027] Please see Figure 1-2Three rectifier bridges are mounted on the front of the main circuit board 1, located on one side of the inner wall of the casing 4. Each of the three rectifier bridges is equipped with an aluminum heat sink. A rectifier bridge is a circuit device used to convert alternating current (AC) to direct current (DC). It typically consists of four diodes arranged in a bridge configuration. The basic principle of a rectifier bridge is to utilize the unidirectional conduction characteristic of diodes to conduct the negative and positive half-cycles of the AC signal, thereby converting the AC signal into a unidirectional DC signal. The four diodes in the rectifier bridge respectively undertake the conduction tasks for the positive and negative half-cycles. The aluminum heat sink is a device used for heat dissipation, mainly composed of aluminum heat sink fins and heat pipes. The aluminum heat sink can dissipate heat from the three rectifier bridges. The flow bridge provides targeted heat dissipation. The high-frequency transformer 11 is electrically connected to the second panel connector 17 via wires. The main circuit board 1 is electrically connected to the control panel on the housing 4 via wires. The high-frequency transformer 11 is a power transformer capable of converting electrical energy in the high-frequency range. The working principle of the high-frequency transformer 11 is similar to that of the low-frequency transformer, both based on the principle of inductive coupling. It consists of two or more coils, one of which serves as the input (primary / main) coil, and the other as the output (secondary / auxiliary) coil. Electrical energy is transferred from the input coil to the output coil through magnetic coupling. The control panel is located on the side of the housing 4 and on the second panel connector 17. Above the panel connector 17, from front to back, are mounted a display 13 and a current adjustment potentiometer 12. The display 13 is connected to an external power supply and electrically connected to the control panel via a wire. The current adjustment potentiometer 12 is a variable resistor used to adjust current. It typically consists of a resistance wire or a resistance plate. By sliding or turning the potentiometer 12, the resistance value can be changed, thereby controlling the current flowing through the potentiometer 12. The working principle of the current adjustment potentiometer 12 is based on the resistance in the circuit to which it is connected. When the position of the potentiometer's slide or knob changes, the changing potentiometer resistance causes the current to flow through it. The total resistance in the circuit changes, which in turn changes the magnitude of the current. By precisely adjusting the resistance value of the potentiometer, precise current regulation can be achieved. The main circuit board 1 is electrically connected to the circuit breaker 3 through three connecting pieces 15. The circuit breaker 3 is an electrical device used to protect circuits, equipment, and personal safety. It can automatically cut off the current when an overload, short circuit, or other abnormal situation occurs in the circuit. The main function of the circuit breaker 3 is to monitor the current. When the current exceeds its rated value, the circuit breaker 3 will quickly open (disconnect the circuit) to prevent excessive current from damaging electrical equipment or causing dangers such as fires. After the fault is restored, the circuit breaker 3 can be closed again to continue supplying power.

[0028] Detailed implementation: The power supply of the main circuit board 1 is turned on, and the welding machine is controlled by the control panel. During the operation of the welding machine, the IGBT heat sink 2 is installed above the electrolytic capacitor 9 to quickly dissipate heat from the top of the electrolytic capacitor 9. The secondary rectifier heat sink 16 can dissipate heat from the bottom of the electrolytic capacitor 9. Through dual heat dissipation, the heat dissipation effect and efficiency of the electrolytic capacitor 9 inside the welding machine are effectively improved. The cooling fan 5 is turned on to accelerate the ventilation and heat dissipation of the electrical components inside the casing 4 through the heat dissipation window on the side of the casing 4. The protective net 6 can increase the safety of the cooling fan 5 and prevent foreign objects from being sucked into the cooling fan 5, thus improving the safety of the welding machine's working environment. The cooling fan 5 and the protective net 6 are fixedly connected to the casing 4 by bolts and threaded holes.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A welding machine, comprising a housing (4) and a main circuit board (1), characterized in that: The main circuit board (1) is fixedly connected between three sides of the inner wall of the outer shell (4). An IGBT heat sink (2) is installed on the front of the main circuit board (1). A circuit breaker (3) is installed on one side of the inner wall of the outer shell (4). An electrolytic capacitor (9) is installed on the front of the main circuit board (1) and directly below the IGBT heat sink (2). Three connecting pieces (15) are installed from top to bottom on the front of the main circuit board (1) and on one side of the IGBT heat sink (2). A control panel runs through the other side of the outer shell (4). A first panel connector (14) and a second panel connector (17) are installed from bottom to top on one side of the control panel. A secondary rectifier heat sink (16) is installed on the front of the main circuit board (1) and at the bottom of the inner wall of the outer shell (4). A connector (10) is electrically connected between the secondary rectifier heat sink (16) and the first panel connector (14) of the control panel. A high-frequency transformer (11) is installed on the front of the main circuit board (1) and on one side of the electrolytic capacitor (9).

2. The welding machine according to claim 1, characterized in that: A heat dissipation window is provided at the bottom of one side of the outer shell (4), and a protective net (6) is fixedly connected to one side of the outer shell (4) and the side located at the heat dissipation window. A fixing plate (8) is fixedly connected to the front of the outer shell (4) by screws (7).

3. The welding machine according to claim 2, characterized in that: A cooling fan (5) is fixedly connected to one side of the inner wall of the outer shell (4) and the other side of the heat dissipation window. Threaded holes are provided on the sides of the outer shell (4) to cooperate with the cooling fan (5) and the protective net (6) for fixed connection.

4. The welding machine according to claim 1, characterized in that: Three rectifier bridges are installed on the front of the main circuit board and on one side of the inner wall of the outer casing (4), and aluminum heat sinks are installed on each of the three rectifier bridges.

5. The welding machine according to claim 1, characterized in that: The high-frequency transformer (11) is electrically connected to the second panel connector (17) via a wire, and the main circuit board (1) is electrically connected to the control panel on the outer casing (4) via a wire.

6. The welding machine according to claim 1, characterized in that: On the other side of the housing (4), above the second panel connector (17), a display (13) and a current adjustment potentiometer (12) are installed sequentially from front to back.

7. The welding machine according to claim 1, characterized in that: The main circuit board (1) is electrically connected to the circuit breaker (3) via three connecting pieces (15).

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