JPH01245188A - Cooling structure for dc-dc converter - Google Patents

Abstract

PURPOSE:To improve the cooling efficiency of the above structure and to reduce the size thereof as well as to improve the ease of maintenance thereof by housing a DC-DC converter module into a box which is independently hermetically closed and has good heat conductivity, sealing a refrigerant for dip cooling into the box and cooling the box from the outside. CONSTITUTION:The DC-DC converter module 3 is housed into the box 1 which is independently hermetically closed and has the good heat conductivity. The refrigerant 2 for dip cooling is sealed into the box 1. A cooling module 4 is imposed atop the box 1 and cooling is executed by force air cooling or water cooling from the outside. The refrigerant 2 is heated by parts such as transformer and choke in the module 3 having a large calorific value and is lowered in density around said parts. The heated refrigerant moves upward. The upward moving refrigerant 2 is cooled down to the same temp. as the temp. of the cooling module 4 and is increased in density. The cooled refrigerant moves downward. Convectional heat transfer is thereby generated and the parts such as transformer and choke having the large calorific value are efficiently cooled by the heat transfer between solid and liquid of a high heat transfer rate.

Description

[Detailed Description of the Invention] C. Industrial Application Field] The present invention relates to a cooling structure for a power supply device for an information processing system main body device, and in particular, it relates to a cooling structure for a power supply device for an information processing system main body device, and in particular,
Therefore, the present invention relates to a cooling structure for a power supply device for an ultra-large computer in an information processing system that generates a large amount of heat.

[Prior Art] In a conventional power supply system for ultra-large computers of this type, which employs a power supply system in which the power supply is divided into a bulk rectification unit, a large number of DC-DC converters, and a power supply control section, The DC-DC converter was made into a module, and a large heat sink was added to the semiconductor, which consumed a large amount of current and therefore generated a large amount of heat, and was directly cooled by powerful cooling air.

[Problems to be Solved by the Invention] The conventional cooling structure of the power supply device described above requires (a) a large heat sink and a large cooling fan, which increases the size of the equipment and increases the manufacturing cost.

(b) a transformer that constitutes a DC-DC converter;
Since it was difficult to efficiently cool the choke, internal wiring, control circuit, etc., it had the disadvantage that it was difficult to downsize the DC-DC converter even if the cooling fan capacity was increased. was. All of these factors have led to an increase in the size of power supplies for ultra-large computers, which has led to an increase in manufacturing costs.

[Means for Solving the Problems] The present invention aims to solve the above-mentioned conventional problems and provide a cooling structure for a DC-DC converter that is small, has low manufacturing costs, and has good maintainability. In order to achieve such an objective, the cooling structure of the DC-DC converter of the present invention includes a power supply device that is composed of a batch N-flow unit and a large number of DC-DC converters.
In a power supply system in which the DC-DC converter and the power control unit are arranged separately, each DC-DC converter is housed in an independent sealed box with good thermal conductivity, and the refrigerant for immersion cooling is placed in this box. It is characterized by enclosing the box and cooling the box from the outside by forced air cooling or water cooling.

[Example] Hereinafter, the cooling structure of the DC-DC converter of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of a cooling structure for a DC-DC converter according to the present invention.

In the drawing, ■ is a sealed box made of a material with good thermal conductivity. 2 is a refrigerant for immersion cooling that is sealed and stored in the box 1, for example, Barfluorocambon Coolant FX-3300 manufactured by 3M Corporation in the United States.
can be used. 3 is transformer, choke,
This is a DC-DC converter module including internal wiring, a control circuit section, etc. 4 is a cooling module mounted on the upper surface of the DC-DC converter module 3, and is cooled by forced air cooling or water cooling. 5 is a cooling module 4
A pair of pipes installed in

6.7 and °8 are a DC input terminal, a stabilized DC output terminal, and a power supply control connector installed on the side surface of the DC-DC converter module 3, respectively.

Next, the operation of the operation guide mechanism of the present invention will be explained.

In FIG. 1, the immersion cooling refrigerant 2 is heated around parts that generate a large amount of heat, such as a transformer and a choke, in the DC-DC converter module 3.

The immersion cooling refrigerant 2 decreases in density and moves upward. The cooling module 4, which is placed closely on the top surface of the DC-DC converter module, has a pair of pipes 5.
Cooling water or cooling air is circulated and supplied through.

Therefore, the heated immersion cooling refrigerant 2 that has moved above the DC-DC converter module 3 is cooled to the same temperature as the cooling module 4. As a result, the immersion cooling refrigerant 2 becomes denser and moves downward. In this way, thermal convection occurs within the DC-DC converter module 3.

Parts of the DC-DC converter module 3 that generate a large amount of heat, such as a transformer and a choke, are cooled by solid-liquid heat transfer with a large heat transfer coefficient, and can therefore be cooled efficiently.

[Effects of the Invention] As described above, the cooling structure of the DC-DC converter of the present invention includes a transformer in the DC-DC converter module,
Parts that generate a large amount of heat, such as chokes, are cooled by heat transfer between solid and liquid, which has a large heat transfer coefficient, so they can be cooled efficiently. Therefore, each I) C-DC converter module can be made extremely small. I can do something. In addition, since the D and C-DC converters are modularized, each DC-DC converter module can be replaced or installed. Therefore, maintainability is extremely good, and more expensive immersion cooling refrigerants can be used. Since there is no need to do this, it is also economical.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of a cooling structure for a DC-DC converter according to the present invention. l: Box 2: Refrigerant for immersion cooling 3: DC
-DC converter module 4: Cooling module 5:
Pipe 6: DC input terminal 7: Stabilized DC output terminal 8: Power supply control connector

Claims (1)

[Claims] In a power supply system in which the power supply is divided into a bulk rectifier unit, multiple DC-DC converters, and a power supply control section, each DC-DC converter is housed in an independently sealed box with good thermal conductivity. A cooling structure for a DC-DC converter, characterized in that a refrigerant for immersion cooling is sealed in the box, and the box is cooled from the outside by forced air cooling or water cooling.