KR20140110275A - Heat dissipation apparatus for inverter welding machine - Google Patents

Abstract

The present invention relates to a heat dissipation apparatus for an inverter which dissipates heat while concealing elements generating great amount of heat such as a switching element, a rectifying element, and the like inside a heat dissipating body to protect elements from dust, moisture, salt, and the like to prevent the danger of various malfunctions in advance. According to the present invention, the heat dissipation apparatus for an inverter includes a heat dissipating body having a plurality of heat dissipating pins formed at an outer surface and a mounting space formed inside; and a pair of header members tightly coupled to both ends of the heat dissipating body, wherein the heat dissipating body is divided into a plurality of divided heat dissipating bodies, a flat mounting surface is formed inside each of the divided heat dissipating bodies, the mounting space is formed with the flat mounting surfaces, and a switching element, an input rectifying element, and an output rectifying element are installed on the flat mounting surfaces to selectively come in contact with the surfaces.

Description

[0001] HEAT DISSIPATION APPARATUS FOR INVERTER WELDING MACHINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an inverter welding machine, and more particularly, to a heat dissipating device for an inverter welding machine in which heat is dissipated in a state in which an element generating a lot of heat such as a switching element and a rectifier is concealed in a heat dissipating body .

Generally, an inverter welding machine converts a commercial power source (for example, 220 V) into a DC power source, converts the DC power source into a variable voltage / variable frequency AC by switching the DC power source with a plurality of switch elements (e.g., a thyristor) , A voltage is converted by a transformer, and rectified by a rectifier to obtain a welding power source.

The configuration of such a conventional inverter welding machine is shown in a schematic block diagram in Fig. A general inverter welding machine includes an input rectifying section 11 for rectifying commercial AC power to obtain a DC power source, a smoothing section 12 for smoothing the DC power output from the input rectifying section 11, A switching converter 13 for switching the DC power outputted from the switching unit 13 according to a control signal of the control unit and converting the DC power into a high frequency AC, a transformer 14 for down converting the AC power output from the switching converter 13 to a predetermined voltage, An output rectifying section 15 for rectifying the reduced AC output from the transformer 14, a reactor section 16 for smoothing the DC power output from the output rectifying section 15, And a controller 17 for controlling the generation of a square wave of a high frequency by supplying a pulse wave to the pulse wave generator.

The input rectifying unit 11 is a part for receiving commercial power and converting it into a DC power source, and is formed of an input rectifying unit such as a diode module. Since the direct current power outputted from the input rectifying section 11 is an irregular pulse current, it is smoothed by the smoothing section 12 constituted by an electrolytic capacitor or the like.

The switching converter 13 is composed of a plurality of switching elements for switching a direct current power outputted from the smoothing part 12 to convert the direct current power into a square wave of several kHz to several tens of kHz and the switching element is an insulated gate bipolar transistor (IGBT) .

The transformer 14 downconverts the square wave of several tens of kHz at a frequency of several kHz outputted from the switching converter 13 to a voltage desired by the user and converts it.

The output rectifying unit 15 rectifies a rectangular wave output from the transformer 14 and is composed of a plurality of output rectifying elements such as a high speed diode (for example, Ultra Fast Recovery or Schottky Barrier Diode) ) Is smoothed using a reactor and a condenser.

In the inverter welder configured as described above, a high temperature is generated in the switching elements of the switching converter 13, the input rectifying elements of the input rectifying part 11, and the output rectifying elements of the output rectifying part 15.

In other words, a DC voltage of several kHz to several tens KHz is generated by switching the direct current voltage obtained by rectifying the commercial power supply, and is applied to the transformer, so that a lot of heat is generated in the switching element and the rectifier of the inverter. If the high temperature generated continuously is overheated, there is a danger that the elements constituting the inverter may overheat, malfunction of the connecting wires between the elements, or fire.

In order to solve the overheating problem of the inverter, a heat dissipating device is provided. The heat dissipating device is provided with a heat dissipating member in which a plurality of pins for heat dissipation protrude, and a switching element and a rectifying element of the inverter are brought into contact with the heat dissipating member, ).

When the switching elements and the rectifying elements of the inverter are installed in contact with the heat dissipating member, the high heat generated from the elements is conducted to the heat dissipating member, and then the fins of the heat dissipating member having a large surface area are heat- So that overheating of the switching element and the rectifying element is prevented.

However, in the heat dissipating device of the conventional inverter welding machine, since the elements are attached in a state that they are exposed to the outside of the heat dissipating member, dust is piled up due to the working environment when used for a long period of time. As a result, There is a disadvantage that it is liable to lead to fire even by a small spark that can be generated.

Particularly, in a wet climate such as a rainy season, a short circuit in a circuit due to a short circuit may occur due to moisture in the circuit. If the working environment is on the shore, corrosion of the device may occur due to salt, If such corrosion occurs, a short circuit and a signal abnormality may occur in the circuit, resulting in a malfunction.

In addition, since the heat dissipating device of the conventional inverter welding machine has a large size of the heat dissipating plate in order to improve the heat dissipation performance, the space occupied by the heat dissipating member in the inverter welding machine is widened, There is a disadvantage that the number of cases of the mobile terminal should be increased.

KR 1020050111514 A, KR200352701 Y1

Disclosure of the Invention The present invention has been researched to overcome the disadvantages of the prior art described above, and it is an object of the present invention to provide a heat sink The present invention also provides a heat dissipating device for an inverter welding machine, which can protect the devices from dust, moisture, salt, etc. and prevent various malfunctions.

It is another object of the present invention to provide a heat dissipating device for an inverter welding machine that can be realized in a more compact structure by modularizing (unitizing) a plurality of elements in a heat dissipating body.

According to an aspect of the present invention, there is provided a heat dissipating device for an inverter welding machine, including: a tubular heat dissipating body having a heat dissipating part for dissipating heat on an outer surface thereof and having a mounting space formed therein; Wherein the heat dissipating body is divided into a plurality of divided heat dissipating bodies divided in the longitudinal direction, and a mounting plane is individually formed inside the divided heat dissipating body, and the mounting plane includes a switching element, an input rectifying element, , And the output rectifying element is selectively in contact with the output rectifying element.

The divided heat-dissipating bodies each have a split lateral surface formed as an engaging surface, a plurality of fins for heat dissipation are formed on an outer surface of the divided heat-dissipating bodies, a flat mounting plane is formed on an inner surface of the divided heat- Are formed such that two to four of them are formed into a single cylindrical shape, and the engaging side surfaces where the two are in contact with each other are sealed.

The divided heat dissipating bodies are characterized in that the adjacent side surfaces of the divided heat dissipating bodies are coupled to each other by a plurality of fasteners and a sealing member is interposed between the side surfaces of the divided heat dissipating bodies adjacent to each other.

The heat dissipating body may have a cylindrical or quadrangular structure having a mounting space formed therein, and the divided heat dissipating body may have a uniformly divided structure.

Wherein one of the iron core members is provided with a wire guide pipe through which a plurality of electric wires connected to the switching element, the input rectifier element, and the output rectifier element are passed through, and the slit forming and a plurality of air through holes formed by slit forming are provided.

In addition, the edge member may seal the entire edge of the heat-conducting body, as well as the through-hole through which a plurality of electric wires are passed. When the heat-sealing body is sealed, the mounting space of the heat-dissipating body may be filled with insulating oil.

According to the present invention, a device in which a lot of heat is generated, such as a switching element and a rectifying device, constituting an inverter is concealed in a heat dissipating body, thereby securely dissipating heat and protecting elements from dust, moisture, There is a useful effect of preventing the risk of various malfunctions in advance.

In addition, the present invention has a beneficial effect that a plurality of elements are provided in a heat dissipating body so as to be modularized into a unit (unit), thereby realizing a more compact structure.

1 is a block diagram schematically showing a configuration for a general inverter welding machine.
2 is a perspective view illustrating a heat dissipating device for an inverter welding machine according to an embodiment of the present invention.
3 is an exploded perspective view of Fig.
4 is a cross-sectional view showing a heat dissipating device for an inverter welding machine according to the present invention.
5 is a cross-sectional view taken along the line AA in Fig.
Figure 6 is an illustration of an alternative configuration of Figure 4;
7 and 8 are views showing another embodiment of a heat dissipating device for an inverter welding machine according to the present invention.
9 is a view showing another embodiment of the iron core member in the heat dissipation device for an inverter welding machine according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For reference, the sizes of elements and the thicknesses of lines shown in the drawings referred to in describing the present invention can be exaggerated somewhat for convenience of understanding. Further, the terms used in the description of the present invention are defined in consideration of the functions of the present invention, and thus may be changed according to the intention of the user or the operator, and the definition of the term is based on the contents of the present specification I will do it.

2 to 5 are views illustrating a heat dissipating device for an inverter welding machine according to an embodiment of the present invention.

As shown in the drawing, the heat dissipating device 100 for an inverter welding machine according to the present invention includes a heat dissipating body 110 having a heat dissipating portion 118 formed on an outer surface thereof, And a pair of circumferential members (121, 122).

The heat dissipating body 110 has a heat dissipating unit 118 formed on an outer surface thereof and a mounting space 115 formed therein. The switching unit 13, the input rectifying unit 11, and the output rectifying unit 15 of the inverter welding machine are connected to the mounting space 115 by the heat radiating unit 118, Respectively.

The switching converter 13 includes a plurality of switching elements 13a and a circuit board 13b connected to the switching elements 13a through soldering or the like. The input rectifier 11 includes a diode module The output rectifying unit 15 includes a plurality of output rectifying elements 15a and a circuit board 15b connected to the output rectifying elements 15a through soldering or the like, Lt; / RTI >

The heat dissipating body 110 is divided into a plurality of divided heat dissipating bodies 111, 112 and 113. Mounting planes 111a, 112a and 113a are formed on the inner surfaces of the divided heat dissipating bodies 111, .

The mounting space 115 of the heat dissipating body 110 is defined by the mounting planes 111a, 112a and 113a and the switching elements 13a of the switching transformer 13 are connected to the mounting planes 111a, 112a, The input rectifying element 11a of the input rectifying part 11 and the output rectifying element 15a of the output rectifying part 15 can be selectively mounted. In addition, the mounting planes 111, 112 and 113 are formed to be flat, so that the switching element 13a, the input rectifier element 11a, and the output rectifier element 15a are easily contacted.

The switching element 13a, the input rectifying element 11a and the output rectifying element 15a are directly brought into contact with the mounting planes 111a, 112a and 113a of the heat dissipating bodies 111, 112 and 113, The high heat generated in the element 13a, the input rectifying element 11a and the output rectifying element 15a is quickly conducted to the heat dissipating bodies 111, 112 and 113 and then can be very effectively discharged through the heat dissipating unit 118 have.

3, the divided heat-dissipating bodies 111, 112, and 113 may include a first divided heat-dissipating body 111, a second divided heat dissipating body 112, and a third divided heat dissipating body 113 . A plurality of first radiating fins 118a are formed on the outer surface of the first divided heat radiating body 111 and a plurality of first radiating fins 118b are formed on the outer surfaces of the first divided heat radiating body 111. [ The first mounting plane 111a is formed on the inner surface of the first mounting surface 111. [ A plurality of second radiating fins 118b are formed on the outer surface of the second divided heat-radiating body 112 and a plurality of second radiating fins 118b are formed on both sides of the second divided heat- And a second mounting plane 112a is formed on the inner surface of the second mounting surface 112. [ A plurality of third radiating fins 118c are formed on the outer surface of the third divided heat-radiating body 113 and a plurality of third radiating fins 118c are formed on the outer surfaces of the third divided heat- And a third mounting plane 113a is formed on the inner surface of the first mounting surface 113. [

The heat dissipating body 110 is formed in a cylindrical shape by fastening the fasteners 151 to the coupling sides 111b, 112b, and 113b of the first through third divided heat dissipating bodies 111, 112, and 113, The mounting space 115 may have a triangular cross-sectional structure as shown in FIG.

Although the fastener 151 is illustrated as being fastened through the radiating fins 118a, 118b and 118c which are in contact with the first to third divided heat-radiating bodies 111, 112 and 113, the radiating fins 118a, 118b and 118c 112b, 113b of the first to third divided heat-radiating bodies 111, 112, 113, which are inside the bottom of the heat-radiating body 111. [

Between the coupling side face 111b of the first divided heat dissipating body 111 and the coupled side face 112b of the second divided heat dissipating body 112 and the coupled sides 113b of the third divided heat dissipating body 113, The first divided heat-dissipating body 111, the second divided heat-dissipating body 112 and the third divided heat-dissipating body 113 are connected to the coupled sides 111b, 112b, 113b can be ensured.

According to an alternative embodiment, the sealing member 155 may be configured to be inserted into the fitting groove 154 of the engaging side surfaces 111b, 112b, and 113b, as shown in FIG. 6, .

The coupling sides 111b, 112b and 113b of the first through third divided heat radiating bodies 111, 112 and 113 forming the heat dissipating body 110 are sealed by a fastener 151 and a sealing member 153, However, it may be sealed by welding all along the joining sides 111b, 112b, and 113b where the first to third divided heat dissipating bodies 111, 112, and 113 are in contact with each other.

In this case, the first divided heat-dissipating body 111, the second divided heat-dissipating body 112, the third divided heat-dissipating body 110, The heat radiating portions 118 are formed in a circular shape as a whole and the heat radiating portions 118 are connected to the first radiating fins 118a and the second radiating fins 118b And the third radiating fins 118c may be radially formed and configured in a longitudinally continuous structure.

As described above, according to the present invention, since the mounting planes 111, 112, and 113 and the mounting space 115 are disposed inside the heat dissipating body 110 and the ends thereof are also blocked by the strike members 121 and 122, The switching unit 13, the input rectifying unit 11 and the output rectifying unit 15 are concealed in the inside of the heat sink 110 so that the heat sink And the risk of various malfunctions can be prevented in advance.

As shown in FIGS. 7 and 8, the heat dissipating body 110 may be divided into first and second heat dissipating bodies 111 and 112 having a semicircular shape, and the first and second heat dissipating bodies 111 and 112 may have a cylindrical structure . When the first and second divided heat-dissipating bodies 111 and 112 are coupled to each other and assembled into a cylindrical heat-dissipating body 110, a rectangular or hexagonal mounting space 115 is formed therein. A first mounting plane 111a is formed on an inner surface of the first divided heat-dissipating body 111 and a second mounting plane 112a is formed on an inner surface of the second divided heat- The switching element 13a, the input rectifier element 11a and the output rectifier element 15a can be selectively mounted on the plane 111a and the second mounting plane 112a.

At both ends of the heat dissipating body 110, a pair of ironing members 121 and 122 are hermetically coupled. For example, the waisted members 121 and 122 are hermetically coupled to both ends of the heat dissipating body 110 using a screwing structure, a hooking structure, an adhesive, welding, or the like, Can be surely sealed against the outside.

The circuit board 13a of the switching converter 13, the input rectifier 11a of the input rectifier 11 and the circuit board 15a of the output rectifier 15 are connected to one of the tailgate members 121 and 122, A plurality of wires 161 individually connected to the wire guide pipe 165 are passed through the wire guide pipe 165 and guide the wire 161 to pass therethrough. Sealed with heat-resistant silicone or the like to maintain airtightness.

Since the heat dissipating body 110 is installed in an upright state, that is, erected in consideration of the occupied area, the heat dissipating body 110 may be mounted on one end of the heat dissipating body 110 or one of the pair of runners 121, 121 and 122 may be mounted on the bottom of the case of the inverter welder.

A plurality of heat dissipation fins 123 and 124 may be formed on the outer circumferential surface of each of the iron core members 121 and 122 so as to correspond to the heat dissipation fins 118a, 118b, and 118c of the heat dissipating body 110. As described above, according to the present invention, since the heat dissipation fins 123 and 124 are formed on the outer main surface of the iron core members 121 and 122, the heat dissipation performance can be greatly improved.

The mounting space 115 of the heat dissipating body 110 may be filled with insulating oil 119 and both ends of the heat dissipating body 110 may be sealed by a pair of swing members 121 and 122 So that leakage of the dielectric oil 119 should be prevented.

As described above, according to the present invention, since the insulating oil 119 is filled with the mounting space 115 of the heat dissipating body 110 by the tailstock members 121 and 122 while being reliably sealed to the outside, The electrical insulation between the input rectifying section 11 and the output rectifying section 15 is ensured, and the cooling performance is further improved.

In addition, dust, moisture, corrosion and the like are prevented originally due to the structure in which the insulating oil 119 is filled in the mounting space 115, so that short circuit of the circuit and malfunction of the signal can be prevented.

Although the heat dissipating body 110 has been illustrated and described only as an open circular cylindrical structure through the embodiments, it is natural that the heat dissipating body 110 may also be formed in a cylindrical shape such as a square or a hexagonal octagon.

In addition, one of the ironing members 161 and 162 may be formed by shaping a plate having a good conductivity and a thin plate by a press, and the ironing member 161 of one of the ironing members 161 and 162 may be formed as shown in FIG. 9 Slit forming is performed so that the mounting space 115 inside the heat dissipating body 110 and the outside air are communicated with each other except for the most geographical portion fitted to both ends of the heat dissipating body 110 and the part of the wire guide pipe 165. [ A plurality of air through holes 125 may be provided.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments and the accompanying drawings, and various changes and modifications may be made by those skilled in the art .

110: heat dissipating body 111, 112, 113: split heat dissipating body
111a, 112a, 113a: mounting plane 111b, 112b, 113b:
118a, 118b, 118c: radiating fin 115: mounting space
119: insulating oil 121, 122:
125: air passage 153, 155: sealing member

Claims (7)

A tubular heat dissipating body having a heat dissipating portion for dissipating heat on the outer surface thereof and having a mounting space formed therein;
The wiper member includes a wiper member,
Wherein the heat dissipating body is divided into a plurality of divided heat dissipating bodies divided in the longitudinal direction, and mounting planes are separately formed inside the divided heat dissipating bodies,
A switching element, an input rectifying element, and an output rectifying element constituting an inverter are selectively in contact with the mounting plane,
Wherein one of the iron core members is provided with a wire guide pipe through which a plurality of electric wires connected to the switching element, the input rectifier element, and the output rectifier element are passed. The method according to claim 1,
The divided heat-dissipating bodies are each formed as a joint side, a plurality of fins for heat dissipation are formed on an outer surface of the divided heat-dissipating bodies, a flat mounting plane is formed on an inner surface of the divided heat dissipating bodies,
Wherein two to four divided heat-radiating bodies are provided so as to form a single cylindrical shape, and the joint sides of the split heat-radiating bodies which are in contact with each other are sealed. The method of claim 2,
Wherein the divided heat dissipating bodies are coupled to each other by coupling fasteners which are adjacent to each other, and a sealing member is interposed between the coupling side surfaces of the split heat dissipating bodies adjacent to each other. The method according to claim 1,
Wherein the heat dissipating body comprises a plurality of divided heat dissipating bodies uniformly radially divided with respect to a center of the heat dissipating body, the heat dissipating body having a circular space having a mounting space therein. The method according to claim 1,
Wherein the heat dissipation body comprises a plurality of divided heat dissipation bodies uniformly radially divided with respect to a center of the quadrangular structure having a mounting space therein. The method according to claim 1,
And the mounting space of the heat dissipating body is filled with insulating oil. The method according to claim 1,
Wherein a plurality of air through holes are provided in the tailgate so that the mounting space inside the heat dissipating body and the outside air communicate with each other.

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