Electric welding machine core

Abstract

The utility model belongs to the technical field of electric welding machines, in particular to an electric welding machine core which comprises a circuit board, electronic elements are arranged on the circuit board and comprise a rectifier bridge, a capacitor, an IGBT (insulated gate bipolar transistor), a main transformer and a rectifier tube, a first radiator is arranged on one side of the rectifier bridge far away from the circuit board, a second radiator and a third radiator are arranged on the circuit board, and the capacitor is connected with the IGBT. The IGBT tube is tightly attached to the surface of the second radiator, the rectifier tube is tightly attached to the surface of the third radiator, the circuit board is covered with a wind shield, an air channel with the two ends ventilated is formed between the wind shield and the circuit board, and the rectifier bridge, the capacitor, the IGBT tube, the main transformer, the rectifier tube, the first radiator, the second radiator and the third radiator are all arranged in the wind shield. And one end of the air duct is over against the fan. The electronic component is good in heat dissipation effect, the service life of the electronic component is effectively prolonged, and the service life of the electronic component is long.

Description

Technical field:

[0001] The utility model belongs to the technical field of electric welding machines, in particular to a core of an electric welding machine. Background technology:

[0002] The electric welder uses the high-temperature arc generated when the positive and negative electrodes are short-circuited to melt the solder on the welding rod and the material to be welded, so as to combine the contacted objects. Its structure is very simple, which is a high-power inverter power supply. The electric welder includes a housing and a movement arranged in the housing.

[0003] The movement includes a circuit board, on which are arranged electronic components such as a rectifier bridge, capacitors, IGBT tubes (insulated gate bipolar transistors), main transformers, rectifier tubes, etc. The existing movement layout is unreasonable, the heat dissipation effect of the electronic components is poor, the welding temperature is high for a long time, the movement heats up, and the service life of the electronic components is seriously affected, and the service life of the electronic components is short. Summary of the invention:

[0004] The utility model aims to provide an electric welding machine core, which has good heat dissipation effect and effectively improves the service life of electronic components, and the service life of the electronic components is long.

[0005] The utility model is achieved in this way:

[0006] A welding machine movement comprises a circuit board, on which electronic components are arranged, and the electronic components include a rectifier bridge, a capacitor, an IGBT tube, a main transformer and a rectifier tube. A radiator 1 is arranged on the side of the rectifier bridge away from the circuit board, a radiator 2 and a radiator 3 are arranged on the circuit board, the IGBT tube is closely attached to the surface of the radiator 2, and the rectifier tube is closely attached to the surface of the radiator 3. A windshield is arranged on the circuit board, and an air duct with ventilation at both ends is formed between the windshield and the circuit board. The rectifier bridge, capacitor, IGBT tube, main transformer, rectifier tube, radiator 1, radiator 2 and radiator 3 are all arranged in the windshield, and one end of the air duct faces a fan.

[0007] In the above-mentioned electric welding machine movement, the circuit board is arranged vertically, the electronic components are arranged on the front side of the circuit board, the IGBT tubes are arranged in two groups, and the radiator 2 is arranged with two above and below, one group of IGBT tubes is closely attached to the upper surface of the radiator 2 located above, and the other group of IGBT tubes is closely attached to the lower surface of the radiator 2 located below, the radiator 3 is arranged on the left side of the radiator 2 located below, the rectifier tube is closely attached to the lower surface of the radiator 3, the main transformer is arranged on the left side of the radiator 3, the rectifier bridge is arranged on the left side of the radiator 2 located above, the radiator 3 is closely attached to the front surface of the rectifier bridge, the capacitor is arranged on the left side of the rectifier bridge, and the fan is arranged on the right side of the air duct.

[0008] In the above-mentioned electric welding machine core, two capacitors are provided, two IGBT tubes are located above and two IGBT tubes are located below, three rectifier tubes are arranged in parallel, the IGBT tubes and the rectifier tubes are respectively pressed on the corresponding radiators through pressing plates, and the pressing plates are fixedly connected to the corresponding radiators by screws.

[0009] In the above-mentioned electric welding machine core, the two heat sinks are connected by an insulating plate, and the insulating plate is arranged on the inner side of the wind shield.

[0010] In the above-mentioned electric welding machine movement, the wind shield includes a horizontal plate one, a horizontal plate two, and a vertical plate. The horizontal plate one and the horizontal plate two are arranged up and down, and the upper end of the vertical plate is connected to the front end of the horizontal plate one, and the lower end is connected to the front end of the horizontal plate two. The horizontal plate one is fixed to the radiator one by screw one, and the vertical plate is fixed to the radiator two by screw two and fixed to the radiator three by screw three.

[0011] In the above-mentioned electric welding machine core, two pillars are further provided on the front side of the vertical plate, and the two pillars are fixedly connected to the corresponding radiator by screw two and screw three respectively.

[0012] In the above-mentioned electric welding machine core, the windshield is made of transparent plastic.

[0013] In the above-mentioned electric welding machine core, a ventilation gap is provided on the horizontal plate 2 below the capacitor.

[0014] In the above-mentioned electric welding machine core, the electric welding also includes a shell, the shell includes a front panel, a rear panel, a left panel, a right panel, a top plate and a bottom plate, the fan is arranged on the right panel, and ventilation holes are respectively provided on the left panel and the bottom plate.

[0015] In the above-mentioned electric welding machine movement, the radiator 1 includes a vertical connecting plate connected to the rectifier bridge, and a horizontal heat dissipation plate arranged at the front end of the vertical connecting plate, the radiator 2 includes a horizontal connecting plate 1 connected to the circuit board, and a vertical heat dissipation plate 1 arranged on the upper and lower sides of the horizontal connecting plate 1, the IGBT tube is arranged on the corresponding horizontal connecting plate 1, the radiator 3 includes a horizontal connecting plate 2 connected to the circuit board, and a vertical heat dissipation plate 2 arranged on the upper and lower sides of the horizontal connecting plate 2, and the rectifier tube is tightly attached to the lower surface of the horizontal connecting plate 2.

[0016] In the above-mentioned welding machine core, the horizontal heat sink is arranged in plurality along the vertical interval, and the lower surface of the top horizontal heat sink, the upper surface of the bottom horizontal heat sink, and the upper and lower surfaces of the remaining horizontal heat sinks are respectively provided with convex strips; the vertical heat sink one is arranged in plurality along the longitudinal interval, and the rear surface of the frontmost vertical heat sink one, and the front and rear surfaces of the remaining vertical heat sink one are respectively provided with convex strips; the vertical heat sink two is arranged in plurality along the longitudinal interval, and the rear surface of the frontmost vertical heat sink two, and the front and rear surfaces of the remaining vertical heat sink two are respectively provided with convex strips.

[0017] In the above-mentioned welding machine core, the main transformer comprises an iron core, a primary winding and a secondary winding are wound around the iron core, and an insulating tube is sheathed around the secondary winding.

[0018] In the above-mentioned electric welding machine core, the electronic components also include a safety capacitor 1, an input inductor, a safety capacitor 2 and a varistor 1 arranged above the windshield.

[0019] In the above-mentioned welding machine core, the electronic components also include a plurality of varistors 2 arranged below the windshield, and the varistors 2 block the horizontal plate 2 to prevent the horizontal plate 2 from sagging.

[0020] The outstanding advantages of the utility model compared with the prior art are:

[0021] 1. The utility model is provided with radiator 1, radiator 2 and radiator 3 to dissipate heat for the rectifier bridge, IGBT tube and rectifier tube respectively, and at the same time, an air duct is formed through the wind shield, and one end of the air duct is directly facing the fan, so that the wind formed by the fan can enter the air duct well and dissipate heat for the rectifier bridge, capacitor, IGBT tube, main transformer, rectifier tube, radiator 1, radiator 2 and radiator 3 in the wind shield, so that the heat dissipation effect is good, so that the electronic components will not be in a high temperature state for a long time, which effectively improves the service life of the electronic components and prolongs the service life of the electronic components;

[0022] 2. The circuit board of the utility model is arranged vertically, the electronic components are arranged on the front side of the circuit board, the IGBT tubes are arranged in two groups, the radiator 2 is arranged with two groups, one group of IGBT tubes is closely attached to the upper surface of the radiator 2 located above, and the other group of IGBT tubes is closely attached to the lower surface of the radiator 2 located below, the radiator 3 is arranged on the left side of the radiator 2 located below, the rectifier tube is closely attached to the lower surface of the radiator 3, the main transformer is arranged on the left side of the radiator 3, the rectifier bridge is arranged on the left side of the radiator 2 located above, the radiator 3 is closely attached to the front surface of the rectifier bridge, the capacitor is arranged on the left side of the rectifier bridge, and the fan is arranged on the right side of the air duct, the layout is reasonable, and the heat dissipation effect is good;

[0023] 3. A ventilation gap is provided on the second horizontal plate below the capacitor of the utility model. After the wind entering from the right end of the air duct cools down the electronic components in the wind shield, part of it flows out from the left end of the air duct, and the other part flows out from the ventilation gap, which has a good heat dissipation effect on the capacitor. Description of the drawings:

[0024] Figure 1 The utility model is a three-dimensional Figure 1 ;

[0025] Figure 2 The utility model is a three-dimensional Figure 2 ;

[0026] Figure 3 The utility model is a three-dimensional Figure 3 .

[0027] Figure numerals: 1. circuit board; 2. rectifier bridge; 3. capacitor; 4. IGBT tube; 5. main transformer; 6. rectifier tube; 7. radiator one; 8. radiator two; 9. radiator three; 10. wind shield; 11. air duct; 12. ventilation gap; 13. safety capacitor one; 14. input inductor; 15. safety capacitor two; 16. varistor one; 17. insulating board; 18. pillar; 19. varistor two. Specific implementation method:

[0028] The present invention is further described below with reference to specific embodiments. Figure 1 —3:

[0029] A welding machine movement, including a circuit board 1, on which electronic components are arranged, the electronic components including a rectifier bridge 2, a capacitor 3, an IGBT tube 4, a main transformer 5 and a rectifier tube 6, a radiator 1 7 is arranged on the side of the rectifier bridge 2 away from the circuit board 1, a radiator 2 8 and a radiator 3 9 are arranged on the circuit board 1, the IGBT tube 4 is closely attached to the surface of the radiator 2 8, the rectifier tube 6 is closely attached to the surface of the radiator 3 9, a windshield 10 is provided on the circuit board 1, and an air duct 11 with ventilation at both ends is formed between the windshield 10 and the circuit board 1, the rectifier bridge 2, the capacitor 3, the IGBT tube 4, the main transformer 5, the rectifier tube 6, the radiator 1 7, the radiator 2 8 and the radiator 3 9 are all arranged in the windshield 10, one end of the air duct 11 is directly facing the fan, and the electronic components also include a safety capacitor 13, an input inductor 14, a safety capacitor 2 15 and a varistor 16 arranged above the windshield 10.

[0030] The working principle of the utility model is as follows: Figure 1-3As shown, the input current first passes through a filtering circuit composed of a safety capacitor 13, an input inductor 14, a safety capacitor 2 15 and a varistor 16 to remove interference signals, and then converts the DC power into AC power through a rectifier bridge 2, and then filters again through a capacitor 3, and then passes through an inverter circuit composed of an IGBT tube 4 to convert the DC power into AC power with a frequency of 45 Hz, and then passes through a main transformer 5, and then converts the AC power into DC power through a rectifier tube 6.

[0031] like Figure 1-3 As shown, the utility model is provided with a radiator 1 7, a radiator 2 8 and a radiator 3 9 to dissipate heat for the rectifier bridge 2, the IGBT tube 4 and the rectifier tube 6 respectively. At the same time, an air duct 11 is formed through the wind shield 10, and one end of the air duct 11 is directly facing the fan. The wind formed by the fan can enter the air duct 11 well, and dissipate heat for the rectifier bridge 2, the capacitor 3, the IGBT tube 4, the main transformer 5, the rectifier tube 6, the radiator 1 7, the radiator 2 8 and the radiator 3 9 in the wind shield 10. The heat dissipation effect is good, so the electronic components will not be in a high temperature state for a long time, which effectively improves the service life of the electronic components and prolongs the service life of the electronic components.

[0032] Specific installation structure of electronic components and radiators: such as Figure 1-2 As shown, the circuit board 1 is arranged vertically, the electronic components are arranged on the front side of the circuit board 1, the IGBT tubes 4 are arranged in two groups, the heat sink 2 8 is arranged in two groups, one group of IGBT tubes 4 is closely attached to the upper surface of the heat sink 2 8 located above, and the other group of IGBT tubes 4 is closely attached to the lower surface of the heat sink 2 8 located below, the heat sink 3 9 is arranged on the left side of the heat sink 2 8 located below, the rectifier tube 6 is closely attached to the lower surface of the heat sink 3 9, the main transformer 5 is arranged on the left side of the heat sink 3 9, the rectifier bridge 2 is arranged on the left side of the heat sink 2 8 located above, the heat sink 3 9 is closely attached to the front surface of the rectifier bridge 2, the capacitor 3 is arranged on the left side of the rectifier bridge 2, and the fan is arranged on the right side of the air duct 11. The layout is reasonable and the heat dissipation effect is good.

[0033] Furthermore, the capacitor 3 is provided with two, the IGBT tube 4 located above and the IGBT tube 4 located below are respectively provided with two, the rectifier tube 6 is provided with three in parallel, the IGBT tube 4 and the rectifier tube 6 are respectively pressed on the corresponding heat sink by a pressing plate, and the pressing plate is fixedly connected to the corresponding heat sink by screws.

[0034] In order to ensure the structural stability of the two radiators 8 , the two radiators 8 are connected by an insulating plate 17 , and the insulating plate 17 is arranged on the inner side of the wind shield 10 .

[0035] The structure of the windshield 10 is as follows: Figure 1-3As shown, the wind shield 10 includes a horizontal plate 1, a horizontal plate 2, and a vertical plate. The horizontal plate 1 and the horizontal plate 2 are arranged up and down, the upper end of the vertical plate is connected to the front end of the horizontal plate 1, and the lower end is connected to the front end of the horizontal plate 2. The horizontal plate 1 is fixed to the radiator 1 7 by screw 1, and the vertical plate is fixed to the radiator 2 8 by screw 2 and fixed to the radiator 3 9 by screw 3.

[0036] In order to support the circuit board 1 and make full use of the second screw and the third screw, two pillars 18 are further provided on the front side of the vertical plate. The two pillars 18 are fixedly connected to the corresponding heat sink by the second screw and the third screw respectively.

[0037] In order to facilitate observation of the internal structure of the windshield 10 and reduce production costs, the windshield 10 is made of transparent plastic.

[0038] In order to better dissipate the heat of capacitor 3, Figure 3 As shown, a ventilation gap 12 is provided on the horizontal plate 2 below the capacitor 3. The wind entering from the right end of the air duct 11 cools down the electronic components in the wind shield 10, and then a part of it flows out from the left end of the air duct 11, and the other part flows out from the ventilation gap 12, thereby increasing the flow rate.

[0039] Furthermore, the electric welding also includes a shell, the shell includes a front panel, a rear panel, a left panel, a right panel, a top plate and a bottom plate, the fan is arranged on the right panel, and ventilation holes are respectively provided on the left panel and the bottom plate.

[0040] The structure of the radiator 7: The radiator 7 includes a vertical connecting plate connected to the rectifier bridge 2, and a horizontal heat dissipation plate arranged at the front end of the vertical connecting plate.

[0041] The structure of the radiator 2 8: The radiator 2 8 includes a horizontal connecting plate 1 connected to the circuit board 1, and a vertical heat dissipation plate 1 arranged on the upper and lower sides of the horizontal connecting plate 1, and the IGBT tube 4 is arranged on the corresponding horizontal connecting plate 1.

[0042] The structure of the radiator 3 9: The radiator 3 9 includes a horizontal connecting plate 2 connected to the circuit board 1, and a vertical heat dissipation plate 2 arranged on the upper and lower sides of the horizontal connecting plate 2, and the rectifier tube 6 is tightly attached to the lower surface of the horizontal connecting plate 2.

[0043] In order to achieve a better heat dissipation effect, the horizontal heat dissipation plates are arranged in plurality along the vertical intervals, and the lower surface of the top horizontal heat dissipation plate, the upper surface of the bottom horizontal heat dissipation plate, and the upper and lower surfaces of the remaining horizontal heat dissipation plates are respectively provided with convex strips; the vertical heat dissipation plate 1 is arranged in plurality along the longitudinal intervals, and the rear surface of the frontmost vertical heat dissipation plate 1, and the front and rear surfaces of the remaining vertical heat dissipation plate 1 are respectively provided with convex strips; the vertical heat dissipation plate 2 is arranged in plurality along the longitudinal intervals, and the rear surface of the frontmost vertical heat dissipation plate 2, and the front and rear surfaces of the remaining vertical heat dissipation plate 2 are respectively provided with convex strips.

[0044] The structure of the main transformer 5: The main transformer 5 comprises an iron core, on which a primary winding and a secondary winding are wound, and an insulating tube is sheathed around the secondary winding to effectively isolate the primary winding from the secondary winding.

[0045] In this embodiment, the insulating tube is a fiber tube.

[0046] Preferably, the electronic components further include a plurality of second varistors 19 disposed below the wind shield 10, and the second varistors 19 block the second horizontal plate to prevent the second horizontal plate from sagging.

[0047] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A welding machine core, comprising a circuit board (1), on which electronic components are arranged, wherein the electronic components include a rectifier bridge (2), a capacitor (3), an IGBT tube (4), a main transformer (5) and a rectifier tube (6), characterized in that: A heat sink 1 (7) is provided on the side of the rectifier bridge (2) away from the circuit board (1); a heat sink 2 (8) and a heat sink 3 (9) are provided on the circuit board (1); the IGBT tube (4) is closely attached to the surface of the heat sink 2 (8); the rectifier tube (6) is closely attached to the surface of the heat sink 3 (9); a wind shield (10) is provided on the circuit board (1); a wind duct (11) with ventilation at both ends is formed between the wind shield (10) and the circuit board (1); the rectifier bridge (2), capacitor (3), IGBT tube (4), main transformer (5), rectifier tube (6), heat sink 1 (7), heat sink 2 (8) and heat sink 3 (9) are all arranged in the wind shield (10); one end of the wind duct (11) faces the fan.

2. The welding machine core according to claim 1, characterized in that: The circuit board (1) is arranged vertically, the electronic components are arranged on the front side of the circuit board (1), two groups of IGBT tubes (4) are arranged, two radiators (8) are arranged above and below, one group of IGBT tubes (4) is closely attached to the upper surface of the radiator (8) located above, and the other group of IGBT tubes (4) is closely attached to the lower surface of the radiator (8) located below, the radiator (9) is arranged on the left side of the radiator (8) located below, the rectifier tube (6) is closely attached to the lower surface of the radiator (9), the main transformer (5) is arranged on the left side of the radiator (9), the rectifier bridge (2) is arranged on the left side of the radiator (8) located above, the radiator (9) is closely attached to the front surface of the rectifier bridge (2), the capacitor (3) is arranged on the left side of the rectifier bridge (2), and the fan is arranged on the right side of the air duct (11).

3. The welding machine core according to claim 2, characterized in that: The wind shield (10) comprises a horizontal plate 1, a horizontal plate 2, and a vertical plate. The horizontal plate 1 and the horizontal plate 2 are arranged up and down. The upper end of the vertical plate is connected to the front end of the horizontal plate 1, and the lower end is connected to the front end of the horizontal plate 2. The horizontal plate 1 is fixed to the radiator 1 (7) by screw 1, and the vertical plate is fixed to the radiator 2 (8) by screw 2 and fixed to the radiator 3 (9) by screw 3.

4. The welding machine core according to claim 3, characterized in that: A ventilation gap (12) is provided on the second horizontal plate below the capacitor (3).

5. The welding machine core according to claim 2, characterized in that: The radiator 1 (7) comprises a vertical connecting plate connected to the rectifier bridge (2) and a horizontal heat dissipation plate arranged at the front end of the vertical connecting plate; the radiator 2 (8) comprises a horizontal connecting plate 1 connected to the circuit board (1) and a vertical heat dissipation plate 1 arranged on the upper and lower sides of the horizontal connecting plate 1; the IGBT tube (4) is arranged on the corresponding horizontal connecting plate 1; the radiator 3 (9) comprises a horizontal connecting plate 2 connected to the circuit board (1) and a vertical heat dissipation plate 2 arranged on the upper and lower sides of the horizontal connecting plate 2; the rectifier tube (6) is tightly attached to the lower surface of the horizontal connecting plate 2.

6. The welding machine core according to claim 1, characterized in that: The main transformer (5) comprises an iron core, on which a primary winding and a secondary winding are wound, and an insulating tube is sheathed around the secondary winding.

7. The welding machine core according to claim 1, characterized in that: The electronic components also include a safety capacitor (13), an input inductor (14), a safety capacitor (15) and a varistor (16) arranged above the windshield (10).

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