JPS5937843B2 - transformer equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transformer device that efficiently removes heat generated from a transformer body and suppresses a rise in temperature of the transformer body.

FIG. 1 is a diagram showing an example of a conventional transformer device of this type.

In the figure, 1 is a transformer main body, 2 is an airtight container consisting of an evaporation chamber 3 that houses the transformer main body 1, and a condenser 4 that condenses and liquefies refrigerant vapor, which will be described later. 5 is a pump for circulating the refrigerant liquid 6, and T is a nozzle for spraying the refrigerant liquid transported by the pump 6 onto the transformer body 1.

Generally, the transformer main body 1 is composed of an iron core, a coil, an electrical insulator, etc. During operation, heat is generated due to iron loss, copper loss, etc., so the electrical insulator deteriorates due to temperature rise.
Causes dielectric breakdown.

Therefore, the transformer body 1 must be cooled by some means. In the conventional transformer shown in FIG. 1, a refrigerant liquid 6 whose pressure has been increased and transported by a pump 5 is ejected from a nozzle 7 and sprayed onto the surface of the transformer body 1. The sprayed refrigerant liquid 6 evaporates on the surface of the transformer body 1 which is generating heat.
At this time, heat is removed from the surface of the transformer body 1 as latent heat of vaporization and the transformer body 1 is cooled. The generated refrigerant vapor is transferred to condenser 4.
It is condensed and liquefied and returns to the liquid reservoir 8 along the inner wall surface of the closed container 2. In this way, in the conventional transformer device, the refrigerant liquid 6 is simply sprayed onto the transformer body 1 through the nozzle T, so it is difficult to spray the spray liquid uniformly over the surface of the transformer body 1. This has the disadvantage that hot spots (points where local temperature rises occur) occur locally, causing thermal deterioration of electrical insulators.

This invention was made in order to eliminate the drawbacks of the conventional ones described above, and is superior in that it prevents the occurrence of local hot spots by installing a capillary member on the surface of the transformer body that comes into contact with the refrigerant liquid. The purpose of the present invention is to provide a transformer device having a cooling effect. FIG. 2 is a diagram showing the configuration of a transformer device in an embodiment of the present invention.

In the figure, numerals 1 to 8 are the same as those of the conventional transformer device described above, so a description thereof will be omitted. Reference numeral 9 denotes a capillary member having a capillary force, which is attached to the surface of the transformer body 1 that is in contact with the refrigerant liquid, that is, the heat radiation surface of the transformer body 1.

When the capillary member 9 is installed in this way, the refrigerant liquid 6 that is unevenly distributed will wet the surface (heat radiation surface) of the transformer body 1 due to the capillary force of the capillary member 9, and hot spots will be eliminated. It will disappear. FIG. 3 shows a part of the transformer body 1 in detail, and shows a coil 1 around the iron core 10.
1 is wound in multiple layers with an insulator 12 in between.

Capillary member 9 is the surface (heat radiation surface) of iron core 10 and coil 11
is installed on. Refrigerant liquid 6 is sprayed from a nozzle 7 between the coils 11 and between the coil 11 and the iron core 10, is absorbed by the capillary member 9, and uniformly wets the surfaces of the iron core 10 and the coil 11. FIG. 4 shows another embodiment of this invention,
A portion of the transformer body 11 to which the capillary member 9 is attached is immersed in the refrigerant liquid 6 in the liquid reservoir 8 .

When the height of the transformer body 1 is low and the capillary force of the capillary member 9 is sufficiently large, the refrigerant liquid 6 in the liquid reservoir 8 flows into the capillary member 9.
It is pulled up to the upper part of the transformer main body 1 by the capillary force of the transformer main body 1, and the heat radiation surface of the transformer main body 1 is uniformly wetted. Therefore, in this case the performance of the pump 5 may be lower than that of a conventional transformer arrangement. Furthermore, when an electrical insulator is used for the capillary member 9, since the transformer body 1 is surrounded by the capillary member 9 with a high breakdown voltage,
The dielectric breakdown strength is increased compared to when the refrigerant liquid 6 is sprayed in a conventional transformer.

As explained above, this invention can wet the transformer body uniformly by attaching a capillary member with capillary force to the surface of the transformer body that is in contact with the refrigerant liquid (heat radiation surface).
It is possible to provide a transformer device that prevents the occurrence of local hot spots and has an excellent cooling effect.

[Brief explanation of drawings]

Figure 1 is a diagram showing the configuration of a conventional transformer device;
The figures are diagrams showing different embodiments of the transformer device according to the present invention. In the figure, 1 is a transformer main body, 2 is a closed container, 6 is a refrigerant liquid, 8 is a liquid reservoir, and 9 is a capillary member.

Claims (1)

[Scope of Claims] 1. A transformer body housed in a closed container is supplied with a refrigerant liquid and cooled by dispersion, in which a capillary member is attached to the surface of the transformer body that comes into contact with the refrigerant liquid. A transformer device featuring: 2. The transformer device according to claim 1, wherein the transformer device is an electrical insulator made of capillary members. 3. Claim 1, characterized in that a part of the transformer main body is immersed in a refrigerant liquid stored in a closed container.
The transformer device according to item 1 or 2.