JPH03241699A - High-voltage generator for x-ray control device - Google Patents

Abstract

PURPOSE:To increase the usable capacity in a storage container by connecting a cooling pipe containing a coolant communicated with the coolant in the storage container to the storage container, and forming the cooling pipe in zigzag. CONSTITUTION:When a convection action of a coolant 2 in a storage container 1 occurs due to the temperature rise, the coolant 2 convects inside the storage container 1 and a cooling pipe 5, the convection path is extended, and the cooling effect can be increased. Since the cooling pipe 5 is formed in zigzag, the surface area of the cooling pipe 5 is increased, and the cooling effect can be increased. The cooling efficiency of the coolant 2 can surely be increased, the fluctuation range of bellows 3 provided on the storage container 1 is reduced, the bellows 3 can be miniaturized, and the space in the storage container 1 can be expanded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is particularly directed to an X-ray control device used in an X-ray CT scanner, in which a high voltage generator for supplying high voltage to an X-ray tube can be efficiently It relates to something suitable for cooling.

[Conventional technology]

In the conventional high voltage generator of this kind, as shown in FIG. A built-in transformer (not shown) is cooled by natural convection. A bellows 3 made of rubber or the like is provided on a part of the surface of the storage container 1 to cope with expansion of the coolant due to temperature changes.

In such a conventional technique, a fan 4 is installed at a position facing the storage container 1 in order to cool the coolant 2,
Cooling is forcibly performed by a fan 4.

[Problem to be solved by the invention]

By the way, in the conventional technology, the transformer is cooled by convection of the coolant 2 only within the storage container 1, so even though the coolant 2 is cooled by the fan 4, the cooling efficiency of the transformer is not good. do not have.

In particular, in recent years, the negative side input has become a high frequency, so the loss of the transformer increases and the temperature of the coolant increases significantly. If the temperature rises significantly like this, there is a risk that it will exceed the heat resistance classification (for example, Class A) of the insulation for the coils that make up the transformer, which is dangerous. There is a problem that is unavoidable.

An object of the present invention is to provide a high voltage generator for an X-ray control device that reliably improves the cooling efficiency of the coolant and eliminates the need for an expensive transformer.

[Means to solve the problem]

In order to achieve the above object, in the present invention, a cooling pipe containing a coolant that communicates with the coolant in the storage container is connected to the storage container, and the cooling pipe is formed by twisting and turning. It has particular characteristics.

[Effect]

When convection occurs in the coolant in the storage container due to temperature rise, as mentioned above, since the cooling pipe is connected to the storage container, the coolant will convect inside the storage container and the cooling pipe, so the convection path will change. As the length increases, the heat dissipation effect of the coolant increases accordingly, thereby increasing the cooling efficiency. Furthermore, since the cooling pipe is formed with twists and turns, the surface area of the cooling pipe can be increased accordingly, and the cooling efficiency can be further improved. Therefore, the cooling efficiency of the coolant can be increased, so even if the loss of the transformer increases due to higher frequencies, there is no risk of exceeding the heat resistance category, and there is no need to use an expensive transformer. In addition, the range of fluctuation of the bellows attached to the storage container is reduced, and the bellows can be made smaller accordingly.
As a result of increasing the space inside the storage container, there is an effect that the usable volume inside the storage container can be increased.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a front view of essential parts showing one embodiment of the present invention;
FIG. 2 is a side view of a high voltage generator applied to an X-ray control device, and the same reference numerals as in FIG. 3 in the same month represent the same or equivalent components.

As shown in FIG. 1, the X-ray control device of the embodiment includes a cooling material 2 made of insulating oil or the like in a storage container 1 of a high voltage generator.
A bellows 3 made of rubber or the like is provided on a part of the surface 3- of the storage container 1 to cope with the expansion of the coolant 2 due to temperature changes, and a fan is further provided to cool the coolant 2. 4 is installed.

A cooling pipe 5 is connected to the storage container 1. The cooling pipe 5 contains a coolant 2 therein, and its both ends are connected to the connecting parts provided on both sides of the upper part of the storage container 1 through joints 6, so that when the coolant 2 in the storage container 1 is convected, It is possible to circulate not only the storage container but also the inside of the cooling pipe 5 by convection.

In addition, the cooling pipe 5 is bent with twists and turns 6, that is, the cooling pipe 5 has one end 5a facing upward, and the tip of the one end 5a has an appropriate length in the lateral direction. While stretching it to form the upper middle part 5b,
The top end of the upper middle part 5b is further extended in a substantially U-shape, hanging straight down toward the connecting part of the storage container 1, and for example, the one end side 5a is alternately arranged left and right along the height direction. It is formed by bending it.

Furthermore, the cooling pipe 5 is made of a material with high thermal conductivity, such as copper or brass, so as to increase the cooling efficiency of the coolant 2. The cooling pipe 5 is assembled to the storage container 1 by connecting the cooling pipe 5 that does not contain the coolant 2 to the storage container 1, and then injecting the coolant 2 into the storage container 1 and the cooling pipe 5. .

On the other hand, the cooling pipe 5 is cooled by the fan 4. As shown in FIGS. 1 and 2, the fan 4 is installed at a position corresponding to the cooling pipe 5 and other units 8.9 in the storage case 7 for the X-ray control device, and is connected to the other units together with the cooling pipe 5. 8 and 9 are also cooled. Note that a discharge fan 1 is installed at the top of the storage case 7.
o is installed.

Next, the operation of the embodiment will be described.

When convection occurs in the coolant 2 in the storage container 1 due to a rise in temperature, the coolant 2 flows inside the storage container 1 and the cooling pipes 5 because the cooling pipe 5 is connected to the storage container 1 as described above. By convection.

The convection path becomes longer, and the heat dissipation effect of coolant 2 increases accordingly.
The cooling efficiency can be increased because of the double gap.

Moreover, since the cooling pipe 5 is formed with twists and turns,
The surface area of the cooling pipe 5 can be increased accordingly, and the cooling efficiency can be further improved. In addition, since the cooling pipe 5 is made of a material with high thermal conductivity and is further cooled by the fan 4, an even further cooling effect can be obtained.

In addition, since the cooling efficiency of the coolant 2 can be reliably increased, the range of fluctuation of the bellows 3 provided in the storage container 1 is reduced, which allows the bellows 3 to be made smaller and the space inside the storage container 1 to be expanded. be able to.

Furthermore, since the fan 4 cools not only the cooling pipe 5 but also the other units 8 and 9 of the X-ray control device, there is no need to increase the number of fans 4, and there is no need to twist and turn the cooling pipe 5. This makes it possible to effectively utilize a limited space such as the storage case 7 of the X-ray control device.

In the illustrated embodiment, an example is shown in which one end side 5a of the cooling pipe 5 is curved, but the present invention is not limited to this.
In short, any position may be used as long as the surface area of the cooling pipe 5 can be increased and the cooling efficiency can be increased.

〔Effect of the invention〕

As described above, according to the present invention, the cooling pipe connected to the storage container and formed by twisting and turning is configured to increase the cooling efficiency of the coolant. Even if the loss (for example, iron loss) becomes large, there is no risk of exceeding the heat resistance category, there is no need to use an expensive transformer, and the range of fluctuation of the bellows attached to the storage container is reduced. As a result, the bellows can be made smaller and the space inside the storage container becomes larger, which has the effect of increasing the volume that can be used inside the storage container.

[Brief explanation of drawings]

Fig. 1 is a front view of essential parts showing an embodiment of the present invention, Fig. 2 is a side view of a high voltage generator applied to an X-ray control device, and Fig. 3 is a conventional X-ray control device. FIG. 2 is an explanatory diagram showing a high voltage generator of FIG. 1... Storage container, 2... Coolant, 3... Bellows, 4... Fan, 5... Cooling pipe, 7... Storage case for X-ray control device). ■Town area 9- =603- Figure 1 Figure 3 Figure 3 Entrance/-Each introduction

Claims (1)

[Claims] 1. In a high voltage generator for an X-ray control device, which has a storage container filled with a coolant, a bellows attached to the storage container, and a fan that cools the coolant, the storage container is equipped with the coolant in the storage container. 1. A high voltage generator for an X-ray control device, characterized in that cooling pipes containing communicating coolant are connected and formed by twisting and turning the cooling pipes.