JPH0318055Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The invention relates to an arc welding machine, and is designed to install a control PC board, parts, etc. that require dustproofing so as to isolate them from forced air cooling air. It is.

Conventional technology and its problems In a conventional arc welding machine, as shown in Fig. 2, heating element parts such as transformers, reactors, semiconductors, and resistors are attached to the frame of the welding machine. The entire unit is cooled by a cooling fan installed at the top of the unit. This cooling fan is fixed by a mounting plate 10 inside the welding machine, and air is taken in from the upper part of the cooling fan 6 and is blown onto the lower heating element by this fan for cooling. In addition, a control board 12 is installed in this welding machine in addition to the heating element described above, and the inside of the welding machine below the cooling fan is partitioned off by a partition plate 11, and it is attached to this partition plate 11 to allow air for cooling. Although we try to prevent direct contact with dust, there are limits to dustproofing. Furthermore, due to advances in electronics, arc welding machines have shifted from SCR type to transistor type, and the overall size of the equipment has become significantly smaller. Therefore, the structure shown in FIG. 2 is not suitable as a structure based on switching. In other words, transformers and reactors are significantly smaller, and because less space is required, the case can also be made smaller.
Conversely, as miniaturization progresses further, the weight of the control circuit increases. In other words, transistors require complicated control, and as a result, control circuits become more complex.
The area occupied by the PC board is larger than that of the SCR type, and conversely, the overall case is significantly smaller, and the PC board must be dustproof, so various inconveniences have arisen as the size and weight have been reduced.

Solution to the Problem In view of this, the present invention is small and lightweight, has a low cost, simple structure, and allows parts that require dustproofing to be housed in a completely dustproof and compact case. It was made like this, and the windings were placed on the underframe.
Main heat-generating parts such as resistors, capacitors, and semiconductors are placed, a cooling fan is installed above them, and a partition plate is installed above the cooling fan to block the wind. Parts that require dustproofing are placed on this partition plate. place,
To provide an arc welding machine in which intake holes for intake of cooling air by a cooling fan are provided in a side plate and a back plate below the partition plate.

Embodiments The present invention will be described below based on illustrated embodiments.

In the figure, 1 is the underframe of the arc welding machine. If necessary, casters etc. are installed at the bottom to make it portable, and heat is dissipated from the transformer 2, reactor 3, thyristor, transistor, diode, etc. on this underframe. A cooling fan 4, an auxiliary transformer 5, etc. are arranged and fixed at appropriate positions, respectively. A cooling fan 6 is disposed above the transformer and reactor. This cooling fan 6 is vertically installed on the lower surface of a partition plate 7 provided at a predetermined position on the underframe, and separates the interior of the welding machine where the front heating element parts and the cooling fan are installed, and the interior where parts that require dustproofing are installed. This partition plate will completely shut it off. Above this partition plate 7, at the top of the instant welding machine, there is a completely dust-proof room for installing the control PC board, etc.
This blocks the air blown out from the cooling fan and the intake air, and a printed circuit board or the like is installed on this partition plate. Note that 8 is an output terminal, and 9 is an intake hole, which is bored in either or both of the side plate and the back plate below the partition plate 7.

Effects of the invention According to the invention, the main heat-generating parts such as windings, resistors, capacitors, and semiconductors are arranged on the underframe, and a cooling fan is installed above the main heat generating parts, and a cooling fan is installed above the cooling fan. The arc is constructed by providing a partition plate for blocking, arranging parts that require dustproofing on this partition plate, and providing intake holes for intake of cooling air by a cooling fan on the side and back plates below the partition plate. Since it is a welding machine, the entire area above the partition plate installed inside the welding machine can be used as space, making it easy to install printed circuit boards, etc., and maintenance and inspection can be performed even in cases that have become smaller due to miniaturization and weight reduction. Workability is good because it can be done from the top of the welding machine, and the front panel only has operation parts, and there is no PC board box like the conventional product shown in Figure 1, so the depth of the case can be shortened and the footprint during use is small. It has advantages such as being easy to use and effective in transportation.

[Brief explanation of the drawing]

FIG. 1 is a sectional view, and FIG. 2 is a diagram of a known example. 1 is the underframe, 2 is the transformer, 3 is the reactor, 4
is a fan, 5 is an auxiliary transformer, 6 is a cooling fan, 7
is a partition plate, 8 is an output terminal, and 9 is an intake hole.

Claims (1)

[Scope of utility model registration request] In an arc welding machine that cools the main heat-generating parts by forced air cooling, the main heat-generating parts such as windings, resistors, capacitors, and semiconductors are placed on the underframe, and a cooling fan is installed above them. A partition plate is provided on the top of the cooling fan to block the wind, parts that require dustproofing are placed on this partition plate, and the intake holes for the cooling fan to take in cooling air are placed on the side and back panels below the partition plate. Arc welding machine installed on a board.