JPS6030096B2 - water cooled condenser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water-cooled condenser with an improved cooling method.

The structure of a conventional high-frequency water-cooled capacitor will be explained according to the drawings.

FIG. 1 shows a partially exploded view of a capacitor element 10, in which electrode aluminum foils 2 and 3 are stacked between a plurality of stacked sheet-like dielectrics la and lb. Then, one electrode aluminum foil 2 is exposed outside the sheet-like dielectrics la, lb, and the other electrode aluminum foil 3 is arranged and wound at the center of the sheet-like dielectrics la, lb, and the lead terminal 5 is wound around the sheet-like dielectrics la, lb. Insert it at an appropriate location to use it as a terminal on one side. After winding these, the portions of the electrode aluminum foils 2 exposed to the outside of the sheet dielectrics la, lb are sandwiched between steel strips or yellow steel strips 4, and fixed with spot welds or eyelets 5, etc. . In addition, this copper strip or brass strip 4
The reason why is attached to the exposed portion of the aluminum foil 2 is to make it easier to solder a cooling pipe for flowing cooling water, which will be described later. 6 is a lead terminal drawn out from the electrode aluminum foil 3.

FIG. 2 shows a capacitor body assembled by assembling a plurality of capacitor elements 10 shown in FIG. 1 in order to obtain the required capacitance. In FIG. 2, 2 is the electrode aluminum foil exposed on one side, and 4 is the copper strip or yellow steel strip fixed by spot welding or eyelet 5. Reference numeral 7 denotes a clamping plate provided on the outer surface of each of the capacitor elements 10 on the outside for tightening the aggregated capacitor elements 10, and 8 collects the aggregate of the capacitor elements 10 held between the tightening plates 7. The cotton band 9 is a piece of paper inserted inside the tightening plate 7.

After each capacitor element 10 is held together with a tightening band 8, the exposed portion of the electrode aluminum foil 2 is laid down horizontally as shown in the figure. FIG. 3 is a plan view of a conventional water-cooled capacitor completed by attaching a cooling pipe to the capacitor body constructed as shown in FIG. 2. As shown in the figure, a cooling pipe 12 for passing cooling water is laid in the exposed part of the electrode aluminum foil 2 which is laid down horizontally, and is fixed integrally with the above-mentioned copper strip or yellow steel strip 4. Attach the cooling pipe 12 by attaching it. After the cooling pipe 12 is attached, the capacitor body is housed in a case 13, vacuum treated, and filled with insulating oil. This completes the water-cooled condenser. Note that 14 is a bushing for leading out the lead terminal 5 of the electrode aluminum foil 3 to the outside. In the conventional device having such a structure, in order to solder the cooling pipe 12 and the exposed steel strip or yellow steel strip of the electrode aluminum foil 2, this part (the shaded part in FIG. 3) is soldered during soldering. The vicinity of the electrode aluminum foil 2 is heated, and the electric power transfer body part near this area also becomes extremely high temperature, and there is a possibility that the sheet-shaped electric power transfer bodies la, lb may melt or the electric power transfer body 2 may be carbonized.

Therefore, there is a risk that insulation failure will occur in this part, and there is a concern that the reliability and quality of the product will deteriorate. Further, the soldering work of the cooling pipe 12 is very difficult, the workability is extremely poor, and there are drawbacks such as the amount of solder used increases and the weight of the product increases. The present invention was made in view of the above circumstances, and
In a capacitor made up of a plurality of capacitor elements wound around a sheet-like electrical current body with a part of the electrode aluminum foil exposed outside, a non-magnetic material is placed between the exposed electrode foil parts of adjacent capacitor elements. It is an object of the present invention to provide a cooling type capacitor which eliminates the above-mentioned drawbacks by having a U-shaped heat dissipating body arranged in contact with an electrode foil, and a cooling pipe being laid at the bottom of the groove of this heat dissipating body. shall be. An embodiment of the present invention will be described below with reference to FIGS. 4 to 8. FIG. 4 shows a partially exploded view of the capacitor element 15 used in this device, in which electrode aluminum foils 17 and 18 are stacked between a plurality of stacked sheet-like dielectrics 16a and 16b. One end of the electrode aluminum foil 17 is exposed to the outside of the sheet-shaped dielectric bodies 16a, 16b, and the other electrode aluminum foil 18 is arranged at the center of the sheet-shaped dielectric bodies 16a, 16b and wound. The terminal 19 is inserted at an appropriate location to serve as a one-sided terminal. After winding these, the electrode aluminum foil 17 exposed to the outside of the sheet-like dielectrics 16a, 16b is shaped. FIG. 5 is a perspective view of the capacitor element 15 made in this manner, with the electrode aluminum foil 17 being shaped.

FIG. 6 shows a capacitor body assembled by collecting a plurality of capacitor elements 15 shown in FIG. In the figure, 1
Reference numeral 5 designates the above-mentioned capacitor element, in which a plurality of capacitor elements 15 are layered together in a mirrored manner with their directions aligned, a piece of paper 20 is applied to both ends in the stacking direction, and a tightening plate 21 is applied to the outside thereof. . Then, the capacitor elements 15 stacked from the outer circumferential side of the clamping plate 21 are gathered together vertically from the clamping band 22 to be integrated. In this way, the capacitor body 23 is formed. Further, a lead wire 24 is connected to the lead terminal 19 and led out to the outside. FIG. 7 is a perspective view of a cooling device attached to the capacitor body 23 shown in FIG. 6. In FIG. 7, 25 is a cooling pipe through which cooling water passes, and 26 is a heat radiator made of a non-magnetic metal material such as copper or aluminum, which is formed into a U-shaped cross section. Place them in parallel.
The cooling pipe 25 is laid between each heat radiator 26, passing through the groove bottom of the heat radiator 26 and winding from one neighbor to the next.
The cooling pipe 25 is then fixed to the heat radiator 26 by soldering or silver brazing to form a cooling device 27. This cooling device 27 is attached between the externally exposed portions of the electrode aluminum foil 17 of the capacitor element 23 shown in FIG.

That is, the exposed portions of the electrode aluminum foil 17 protrude at predetermined intervals as shown in FIG. 6, and on the other hand, the heat sinks 26 of the cooling device 27 are arranged at predetermined intervals.
If the spacing between the heat sinks 26 is the same as the spacing between the exposed portions of the electrode aluminum foils 17 of the adjacent capacitor elements 23, then each heat sink 26 of the cooling device 27 will have one spacing for every two capacitor elements 15, as shown in FIG. The electrode aluminum foil 17 is housed in the exposed portion at a ratio of 1 to 3. Thereafter, the heat radiator 26 is fixed to the exposed portion of the electrode aluminum foil 17 using eyelets, spot welding, etc. using the contact surface between the two. In this way, the capacitor body 28 is completed. Although this capacitor body 28 is not shown, it is housed in a capacitor case to form a water-cooled capacitor.

In this device configured as described above, the cooling pipe 25 is soldered or silver brazed to the heat sink 26, and then the heat sink 26 is attached to the exposed part of the electrode aluminum foil 17 of the capacitor body 23.
Since the heat dissipating body 26 is fixed to this exposed part by iron fitting or welding, there is no need to solder the cooling pipe to the electrode aluminum foil part as in the past, which improves work efficiency and improves the cooling device. 27 is completed in advance and is fixed to the exposed portion of the electrode aluminum foil 17 with eyelets or spot welds, so there is no need to worry about the electrode aluminum foil becoming hot. Therefore, there is no need to worry about the sheet-like dielectrics 16a, 16b melting or carbonizing the atomized paper 20, and there is no deterioration of the dielectrics.
In addition, since the cooling device 27 is a combination of the heat radiator 26 and the cooling pipe 25, the cooling effect is large, so the installation length of the cooling pipe 25 can be short, and the heat radiator 26 can also be small. Since only a small amount of solder etc. is required, the weight can be reduced compared to the conventional method. Therefore, this device has improved workability during assembly, high quality and reliability, and is lightweight. In this way, a part of the electrode foil made of metal foil such as aluminum foil is exposed to the outside of the sheet-like dielectric material and wound, and a plurality of capacitor elements are formed and assembled, and the electrode foil is cooled with a cooling pipe. In a water-cooled capacitor, a plurality of heat sinks made of non-magnetic material each having a substantially U-shaped cross section are arranged at intervals approximately equal to the spacing between the exposed electrode foils, and each heat sink is spaced between adjacent heat sinks. A cooling device is formed by laying a cooling pipe using the groove portion (the back surface thereof is also acceptable), and the cooling device is fixed by fixing the heat sink between the exposed electrode foils of the aggregate of the capacitor elements. Because of the attached structure, workability during assembly is improved, and a water-socket type capacitor with excellent features of high quality and reliability can be provided.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can be practiced with appropriate modifications within the scope of the invention without changing its gist.

[Brief explanation of the drawing]

Fig. 1 is a partially exploded view of a conventional capacitor element, Fig. 2 is a perspective view of a conventional capacitor element, Fig. 3 is a plan view showing the configuration of a conventional water-cooled capacitor, and Fig. 4 is a diagram showing the structure of a conventional water-cooled capacitor. FIG. 5 is a perspective view of the capacitor element used in the device of the present invention; FIG. 6 is a perspective view of the capacitor body used in the device of the present invention; FIG. 7 shows the structure of the cooling device. FIG. 8 is a perspective view showing the main body of a water-cooled condenser according to the present invention. 15... Capacitor element, 16a, 16b.・
・...Sheet-like electrical body, 17, 18... Electrode aluminum foil, 21... Tightening plate, 22... Tightening band, 23... Capacitor element Body, 25...
... Cooling pipe, 26 ... Heat sink, 27 ...
... Cooling device, 28 ... Capacitor body. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] 1. A capacitor body composed of a plurality of capacitor elements wound around a sheet-like dielectric with a part of the electrode foil exposed outside, and a heat dissipation body made of a non-magnetic material formed into a substantially U-shaped cross section. and a cooling device in which a plurality of cooling pipes are arranged and fixed to adjacent heat radiating bodies, and the heat radiating body of the cooling device is attached between exposed portions of each electrode foil of the capacitor body. water-cooled condenser.