JPH0365004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an evaporative cooling type transformer using an evaporative refrigerant liquid as a refrigerant.

[Conventional technology]

Figure 2 shows the structure of a conventional evaporative cooling transformer. In order to reduce the volume of the transformer, a condenser 9 is provided on the second floor, separated from the wall 17. A winding 2 and an iron core 3 are housed in a sealed container 1.
A mixed gas of a non-condensable insulating gas and a condensable refrigerant vapor is sealed in the sealed container 1 . Diffuser 8
A refrigerant liquid is sprayed onto the windings 2 and the iron core 3, and evaporates to cool them. The refrigerant liquid that has flowed down is collected in the liquid reservoir 6 and guided by the pump 7 to the diffuser again. The vaporized condensable refrigerant vapor and non-condensable insulating gas are led to the condenser 9 through the pipe 13. The refrigerant liquid condensed and liquefied in the condenser 9 is sent to the diffuser 8 through a pipe 16. In addition, the non-condensable insulating gas in the condenser 9 is
It is sent to the blower 10 through the piping 15. The blower 10 sends this insulating gas back to the sealed tank 1.

[Problem that the invention seeks to solve]

If the refrigerant liquid collides with the blower 10, the rotary blades will be damaged, so it was necessary to provide separate piping 16 for the refrigerant liquid and piping 15 for the insulating gas. Therefore, three pipes had to pass through the wall 17, making the installation work complicated. In addition, waterproofing measures for the penetrating portions have become complicated.

This invention was made to solve the above problems, and aims to provide an evaporative cooling transformer that is easy to install by reducing the number of pipes that penetrate the wall.

[Means for solving problems]

The evaporative cooling type transformer according to the present invention guides the condensable refrigerant liquid and non-condensable insulating gas from the condenser downward through the first pipe, and in a substantially horizontal direction through the second pipe. ing. The second pipe is provided with a transfer means for transferring the non-condensable insulating gas to the sealed container and a liquid reservoir. A third pipe is routed from the liquid pool to the diffuser.

[Effect]

Condensable refrigerant liquid and non-condensable insulating gas from the condenser flow from the first pipe to the second pipe. The condensable refrigerant liquid collects in a pool and is led through a third pipe to a diffuser. On the other hand, the non-condensable insulating gas is transferred into the sealed container by the transfer means.

〔Example〕

An embodiment of this invention is shown in FIG. A winding 2 and an iron core 3 are housed in a sealed container 1. A mixed gas of a non-condensable insulating gas and a condensable refrigerant vapor is sealed in the sealed container 1 . The refrigerant liquid in the diffuser 8 is spread over the windings 2 and the iron core 3 and cools them by evaporation. The refrigerant liquid that has flowed down is collected in the liquid reservoir 6 and guided by the pump 7 to the diffuser again. The vaporized condensable refrigerant vapor and non-condensable insulating gas are led to the condenser 9 through the pipe 13. The refrigerant liquid condensed and liquefied in the condenser 9 and the compressible insulating gas are transferred to the first pipe 15.
is transmitted to the second pipe 30. The first pipe 15 is arranged substantially vertically, and the second pipe 30 is arranged substantially horizontally. The second pipe 30 is provided with a liquid reservoir 23 in which the refrigerant liquid is collected and sent through the third pipe 24 to the diffuser.
Therefore, in the portion 30a of the second pipe 30,
Only insulating gas is introduced. A blower 10 serving as a transfer means sends this insulating gas into the sealed container 1.

In the above embodiment, a case has been described in which a mixed gas of a condensable refrigerant and a non-condensable insulating gas is used, but the present invention can also be applied to a case where only refrigerant vapor is used.

〔Effect of the invention〕

According to this invention, the following effects can be obtained.

First, the number of pipes connecting the condenser and the sealed container can be reduced to two, making installation and maintenance easier.

Second, metal foreign matter is collected at the bottom of the liquid pool,
This prevents these from flowing into the sealed container, improving the lifespan and reliability of the transformer.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a conventional evaporative cooling type transformer. 1 is a sealed container, 2 is a winding wire, 7 is a transfer pump, 9
is a condenser, 10 is a blower, 15 is a first pipe,
30 is a second pipe, 24 is a third pipe, and 23 is a liquid pool. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A winding, a sealed container in which the winding is housed and a mixed gas of a non-condensable insulating gas and a condensable refrigerant vapor is sealed, a wire wound with a condensable refrigerant liquid in the sealed container. A pump that transfers the gas mixture to the diffuser installed at the top of the container, A condenser that condenses the mixed gas in the sealed container and liquefies the condensable refrigerant vapor, A pump that transfers the condensable refrigerant liquid and non-condensable insulating gas from the condenser downward. a first pipe that leads to the first pipe; a second pipe that is connected to the first pipe and is arranged in a substantially horizontal direction; means, a liquid reservoir provided in the second pipe and located between the first pipe and the transfer means; a third channel for guiding the non-condensable refrigerant liquid in the liquid pool to the diffuser;
An evaporative cooling transformer characterized by having piping.