JPS607745A - Vapor cooling device - Google Patents

Abstract

PURPOSE:To produce a vapor cooling device with excellent cooling capacity by a method wherein an automatic resetting gas releasing device is provided near topmost position of sealed vapor phase part. CONSTITUTION:The releasing and resetting pressure of an automatic resetting gas releasing device 14 is set up to specified value and when a heating element 1 is heated, the air mixed with the gas in a vapor phase part and the air resolved in a liquid phase part are released to be stagnated in the upper part of a sealed vessel 2 and a condenser 5 deteriorating the cooling capacity thereof with the vapor phase content of cooling medium 3 insufficiently condensed raising the internal pressure of the sealed system. When the internal pressure exceeds the specified value, the device 14 is automatically opened to externally release the air in the upper part of the vapor phase part. When the condenser 5 recovers the specified cooling capacity thereof after releasing, the internal pressure declines to reset said device 14 to closed position. During these operations, the internal air shall not be mixed with atmospheric air at all and even if mixed with the same due to any seal leakage, it will be released from the device 14 by said operations when the heating element 1 is heated to maintain normal operations without deteriorating the cooling capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an evaporative cooling device that cools electrical equipment such as a transformer by utilizing a phase change of a condensable cooling medium such as fluorocarbon.

Figure 1 shows a conventional boiling cooling device of this type.
In Fig. 1, (1) is a heat generating element such as a transformer, which is immersed in the cooling medium liquid phase (3) contained in the boiling part (4) of the sealed container (2), or the sealed container (2). They are stored in a container in such a way that they are in contact with each other. (5) is the boiling part (4)
A condenser is disposed on the side of the condenser (5), and the coolant liquid level (6) reaches the middle of the cooling pipe of the condenser (5). The upper part of this condenser (5) and the sealed container (1)
) are connected by a gas phase pipe (2), and the lower part of the condenser (5J) and the lower part of the sealed container (17) are connected by a liquid phase pipe Q.

Next, its effect will be explained. The gas phase (7) generated by the heat generated by the heating element (1) passes through the gas phase pipe (6) and reaches the condenser (5). Heat is taken away by the phase change in which the gas phase (7 N) condenses and changes to the liquid phase. ) move inside.

However, such conventional devices have the following drawbacks. That is, condensable cooling media generally form a sealed system, such as Freon 113? 'h Used as a BJ medium. In such equipment, if there is a gas such as air inside the sealed system, the specific gravity of the air will be 113 fluorocarbons.
Since the specific gravity of the gas phase is lighter than that of the Freon 113 gas phase, it accumulates above the Freon 113 gas phase. In other words, it accumulates in the upper part of the condenser and blocks the inlet of the cooling pipe (or refrigerant passage) of the condenser. Therefore, during operation, the gas phase generated from around the heating element flows into the cooling pipe (or refrigerant passage).
(or refrigerant passages), and the condensing capacity will drop significantly, or worse, it will drop to zero. Therefore, before the cooling medium liquid is sealed in the container, the inside of the container must be sufficiently evacuated, and the cooling medium liquid must also be sufficiently degassed before being sealed in the container. In addition, if a leak occurs in a sealed system for some reason, the boiling point of Freon 113 at atmospheric pressure is 47.6°C, so when the electrical equipment is out of operation, the temperature of the electrical equipment will be approximately equal to the ambient temperature. 113 boiling point 47
．． Since the temperature becomes lower than 6° C. and the pressure inside the sealed device becomes lower than atmospheric pressure, air enters and causes a decrease in cooling capacity as described above.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional device. By providing an automatic return gas release device near the highest position of the gas phase part of the sealed system, the boiling cooling system has excellent cooling ability. An embodiment of the present invention, which provides a device, will be described below with reference to FIG. In FIG. 2, (1) to Q3 are the same parts as the first □□□ and have the same function, so their explanation will be omitted. The α-yu is an automatic return gas release device installed near the highest position of the gas phase part of the sealed system. In this automatic return gas release device α, (1
4aJ is a cover, which moves upward when the internal pressure of the sealed system rises above a predetermined value to create a gap between it and the flange (14) and releases gas from there. , when the internal pressure of the sealed system falls below a predetermined value, the cover (14a) is automatically pulled down and the flange (
14bJ and has the role of sealing again.

Next, its effect will be explained. The gas phase (7) generated by the heat generated by the heating element (1) passes through the gas phase pipe 4 and reaches the air self-cooled condensing section (5), where it condenses and changes into a liquid phase. Heat is removed.The liquid phase that is cooled, condenses, and falls moves from the liquid phase V (end) at the bottom of the condenser into the boiling section (4).

Therefore, in the present invention, since the automatic return gas release device a< is provided near the highest position of the gas phase part, the degassing process of the cooling medium liquid by vacuuming the container is omitted, and after the device is assembled. Gas such as air inside the sealed system can be released by heating the heating element. In other words, automatic return gas release device◇
When the heating element is heated after the opening/return operation pressure is set to a predetermined value, the air mixed in the gas phase and the air dissolved in the liquid phase are released, causing the air to leak into the sealed container or condenser. It accumulates in the upper part of the gas phase, and the cooling capacity of the condenser decreases, and the gas phase of the cooling medium is not sufficiently condensed, causing the internal pressure of the sealed system to rise rapidly. When this occurs, the automatic return scum discharge device αa automatically opens, and the air and other gases above the gas phase are released to the outside of the sealed system.The air and other gases are released, and the condenser When the cooling capacity is restored to the specified level, the internal pressure will decrease and the automatic return gas release device will return to its original closed state. Therefore, there will be no outside air mixed in.
Even if a leak occurs in the sealed system and air gets mixed in, if the heating element heats up, the gas can be released from the automatic return gas release device using the same operation as described above, allowing normal operation without reducing cooling capacity. You can drive safely.

In addition, FIG. 8 shows another embodiment of the present invention, and when there are multiple peaks (16a), I, and 16b) in the gas phase part of the sealed system, the vibrator 4 is used to connect the areas near the peaks of these peaks. , if the mountains are communicated with each other, the automatic return gas release device is 1
It is possible to effectively release the air inside the honey thread.

As described above, according to the present invention, by installing the automatic return inlet/output device near the top of the gas phase section, the work of evacuation of the device and degassing of the refrigerant liquid can be omitted, and it has excellent cooling capacity. A boiling cooling device that is extremely advantageous in practice can be obtained.

[Brief explanation of the drawing]

Figure 1 is a partially cross-sectional three-sided view of a conventional evaporative cooling device;
FIG. 2 is a partially cutaway front view showing an embodiment of the present invention, and FIG. 8 is a partially cutaway front view showing another embodiment of the present invention. In the figure, (1) is a heating element, (2-day-old sealed container, (3) is a refrigerant liquid phase, (4) is a boiling part, (5) is a condenser, (7) is a gas phase, (8) ) is the condensate, Q2 is the gas phase tube, Q3 is the liquid phase tube,
0yu is automatic return gas release device, QQ is connected vibrator, (1
6a,l (16b) are mountains in the gas phase. In the drawings, the same reference numerals indicate the same or corresponding parts. Agent Masuo Oiwa Figure 3/J/J Procedural amendment (spontaneous) August 9, 1920 +1 Mr. Commissioner of the Japan Patent Office - 1. Indication of case Patent application No. 117518/1982 2, Tsu δ
□(7) Name + h: Boiling cooling device 3, Representative Hitoshi Katayama of the person making the amendment Part 4, Column for detailed explanation of the agent's invention and drawing 6, Contents of the amendment (1) Specification, page 2, number 2 In line 14 of the page, correct "Liquid phase" to "Liquid phase (8)".0 (2) Correct figures 1, 2, and 8 of the drawings. Above is the 8th evil

Claims (2)

[Claims] (1) In a boiling cooling system that stores a condensable cooling medium in a container and uses the phase change of this cooling medium to cool electrical equipment, the airtight container or condenser is placed near the highest point of the gas phase. A boiling cooling device characterized by being equipped with an automatic return type gas release device. (2) When there are multiple peaks in the gas phase part of a sealed container or condenser, the vicinity of the peaks of these peaks are connected with a vibrator to communicate between the peaks. Claim 1
Boiling cooling device as described in section.