JPH01155150A - Refrigerator - Google Patents

Abstract

PURPOSE: To facilitate maintenance by arranging one end side of a heat pipe in a cooling area for cooling a working gas while the other end side is air- cooled to eliminate the need for the continuous supply of cooling water and gets rid of corrosion caused by the cooling water. CONSTITUTION: A heat pipe 11 has the lower end side thereof positioned in a casing 1 and the upper end side outside the casing 1. Moreover, a plurality of disc-shaped cooling fins 12 with a hole are mounted being fitted onto the upper end side of the heat pipe 11 and cooled by cooling air generated by a fan. As a displacer 2 is moved to the side of an expansion chamber 8, a working gas is compressed and heated in a compression chamber 9. The compressed and heated working gas directly contacts the lower end side of the heat pipe 11 to apply heat. A refrigerant liquid in the heat pipe 11 deprives heat of the heat pipe 11 to be evaporated, rises in the heat pipe 11 to the upper end side thereof where heat is released and liquefied again and then. drops onto the lower end side by its dead load. By repeating this phenomenon, the heat of the working gas is continuously released outside.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refrigerator that can realize low-temperature freezing by performing cooling using a Stirling cycle.

[Conventional technology]

As shown in FIG. 3, for example, such a refrigerator includes a cylinder 3 that functions to guide the vertical movement of the displacer 2 and form a flow path for working gas (for example, He gas) with a certain gap formed in the casing 1. A cooler 4 which stores the cold heat of the working gas passing through the gap is inserted into the cold storage area of the gap, and is supplied from the water supply pipe 5a as shown by the arrow in the figure to the drain pipe 5b. A water cooler 5 is used in which the working gas can be cooled by the cooling water discharged as shown by the arrow in the figure, and is disposed in the cooling area of the gap. An expansion chamber 8 is formed above the displacer 2, and a compression chamber 9 is formed below the expansion chamber 2. The working gas can be expanded in the expansion chamber 8, while the compression chamber 9 is In this case, the working gas is compressed by the upward movement of the piston 6. Further, an O-ring 7 is interposed between the water cooler 5 and the casing 1 to prevent leakage of cooling water and working gas.

In such a refrigerator, when the displacer 2 moves toward the expansion chamber 8 (in other words, when it rises from the bottom dead center toward the top dead center), the working gas in the expansion chamber 8 is pushed out of the chamber, and the regenerator 4 After passing through the water cooler 5 and being cooled while discarding cold energy, it flows into the compression chamber 9. Therefore, the expansion chamber 8 is always kept at a low temperature, while the compression chamber 9 is always kept at a high temperature.

Next, when the displacer 2 descends to the bottom dead center, the piston 6 rises after a certain period of time, and the working gas is compressed between the piston 6 and the displacer 2, that is, within the compression chamber 9. After being pushed out of the room, it flows into the expansion chamber 8 via the water cooler 5 and the regenerator 4. In this process, the working gas is compressed in the compression chamber 9 and its temperature rises, but it is cooled by passing through the water cooler 5, and the heat added by compression is released to the outside via the cooling water. . Further, the working gas cooled by the water cooler 5 is further cooled by the cold heat stored therein when passing through the regenerator 4.

The cold heat of the thus cooled working gas is transmitted to the top of the casing 1, and the top of the casing 1 is cooled by the cold heat. By repeating the above-described operation, the top of the casing 1 is cooled to an extremely low temperature.

[Problem that the invention seeks to solve]

In such conventional refrigerators, the working gas is cooled by cooling water that is continuously supplied to the water cooler 5, so it is difficult to continuously supply the cooling water, such as moving vehicles such as automobiles and trains. The problem was that it was difficult to apply. Another problem was that the water cooler 5 was easily corroded by the cooling water, and maintenance thereof was time-consuming.

The present invention has been made in view of the above circumstances, and provides a refrigerator that can solve the above-mentioned problems, specifically, an automobile,
The purpose of the present invention is to provide a refrigerator that can be applied to moving vehicles such as trains and is easy to maintain.

[Means for solving problems]

The refrigerator according to the present invention uses an air-cooled heat pipe instead of a conventional water cooler to cool working gas. Specifically, one end of the heat pipe is disposed in a cooling area for cooling the working gas, while the other end can be air cooled.

[Effect]

When such a refrigerator of the present invention is used, the working gas can be cooled by an air cooling method instead of the conventional water cooling method.

〔Example〕

The present invention will be described below based on drawings showing embodiments thereof.

FIG. 1 is a longitudinal cross-sectional view showing an example of a refrigerator according to the present invention, and FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1 in the diagram
is a cylindrical casing whose top is sealed by a top plate with a groove, and inside the casing 1, vertical movement guide of the displacer 2 and working gas (for example, He A cylinder 3 is arranged which functions to form a flow path for gas. The gap is divided into a cool storage area on the upper side thereof and a cooling area on the lower side thereof, and a cool storage device 4 for storing the cold heat of the working gas passing through the gap is inserted into the cold storage area. At the same time, in the cooling area,
One end side (lower end side) of a plurality of heat pipes 11 is arranged at equal intervals around the cylinder 3 .

Each of the heat pipes 11 has a curved shape in the middle, and by being installed so that the curved part penetrates the midsection of the casing 1, the heat pipe 11 can be inserted into the casing 1 at one end or the other end. (Top end side) is casing 1
It is located outside. In addition, heat pipe 11
The portion where the gas passes through the casing 1 is sealed by soldering 14 to prevent leakage of the working gas.

Further, a plurality of disk-shaped cooling fins 12 with holes are fitted onto the upper end sides of the heat pipes 11, respectively, and the cooling fins 12 are provided with a plurality of cooling fins 12 having a plurality of holes. The upper end side of the heat pipe 11 is cooled by supplying the guided cooling air as indicated by the arrow in FIG.

That is, the fan 15 serves as a means for air-cooling the heat pipe 11 (specifically, its upper end side).

Note that an expansion chamber 8 is formed only above the displacer 2, and a compression chamber 9 is formed below it. In this case, the working gas is compressed by the rise of the pitton 6.

In such a refrigerator, when the displacer 2 moves toward the expansion chamber 8 (in other words, when it rises from the bottom dead center toward the top dead center), the working gas in the expansion chamber 8 is pushed out of the chamber, and the regenerator 4 The heat flows into the compression chamber 9 after passing through the high-temperature region where the heat pipe 11 is located and the cooling region where the lower end of the heat pipe 11 is located.

Through this process, the working gas in the expansion chamber 8 is highly cooled and cooled as in the conventional case.

Further, when the piston 6 rises after a certain period of time after the displacer 2 descends to the bottom dead center, the working gas is compressed and heated between the piston 6 and the displacer 2, that is, within the compression chamber 9. After the working gas compressed and heated in this way is pushed out from the chamber, it passes through the cooling area where the lower end of the heat pipe 11 is located, and further passes through the high-temperature area where the regenerator 4 is located, and then enters the expansion chamber. It flows into 8. In this process, the compressed and heated working gas is transferred to the heat pipe
1 directly contacts the lower end side of the heat pipe 11, and heat is applied to the heat pipe 11. However, within the heat pipe 11, the refrigerant liquid that collects on the lower end side takes away the heat of the heat pipe 11 and evaporates, causing the heat pipe to evaporate. 11 and reaches the upper end where the cooling fins 12 are externally fitted, where it releases heat and liquefies again, and falls to the lower end due to gravity. When such a phenomenon occurs repeatedly, the heat of the compressed and heated working gas is continuously released to the outside.

In the refrigerator of the present invention in which the working gas compressed and heated in the compression chamber 9 is cooled, the working gas is cooled not by the conventional water cooling method but by the air cooling method.

Therefore, there is no need to continuously supply cooling water, and the refrigerator of the present invention can be applied to moving vehicles such as automobiles and trains. Furthermore, the conventional problem of corrosion due to cooling water is eliminated, and maintenance becomes easier.

〔Effect of the invention〕

As detailed above, since the refrigerator of the present invention cools the working gas using an air-cooling system, the continuous supply of cooling water required for conventional water-cooling systems is no longer necessary, and its uses can be expanded. This also eliminates corrosion caused by cooling water, making maintenance easier.

[Brief Description of the Drawings] Fig. 1 is a longitudinal sectional view showing an example of a refrigerator according to the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a conventional refrigerator. FIG. 2...Displacer 4...Regenerator 6...Piston 8...Expansion chamber 11...Heat pipe 1
2...Cooling fins 15...Fan Note that the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. In order to perform cooling using the Stirling cycle, an expansion chamber and a compression chamber are formed on both sides of the displacer, and as the displacer moves toward the expansion chamber, the low-temperature working gas sent out from the expansion chamber fills the cold storage area and cooling area. The refrigerating machine is configured such that the heat pipe is sent to the compression chamber through the heat pipe, and is characterized in that a heat pipe is provided such that one end thereof is located in the cooling area, and a means is provided for air cooling the other end of the heat pipe. Freezer.