JPS636352A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a refrigeration device that generates extremely low temperatures.
For example, it is used for cooling superconducting magnets.

(Prior Art) In this kind of conventional technology, for example, the one disclosed in Japanese Patent Publication No. 38-6145, as shown in FIG. It is connected to the inlet of an external location C, which is a part to be cooled, through the cooling chamber A, so that the external location C can be cooled by the working gas that has been brought to a low temperature in the cold room A.

(Problem to be Solved by the Invention) However, since the outlet of the external location C is connected to the cold room A via the suction valve, the external location C is cooled and the heated working gas and the low temperature are connected to each other. The disadvantage is that the refrigeration gas is mixed with the working gas in the cold room, resulting in a thermodynamic loss of increased entropy, which lowers the refrigeration output.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above-mentioned problem, the technical measures taken in the present invention are: a first cold room serving as the final stage; a second cold room having a higher temperature than the first cold room; , a compression chamber, a first regenerator interposed between the two cold chambers, and a second regenerator interposed between the second cold chamber and the compression chamber, wherein the working gas is supplied to the first regenerator. A regenerator, a second regenerator, and a regenerator are used to move between the first refrigerant chamber and the compression chamber via the regenerator, a second regenerator and the second regenerator.
a refrigerator that generates low temperature in a cold room and the second cold room;
A discharge valve whose inlet is connected to the first cold chamber, a high-pressure tank whose inlet is connected to the outlet of the discharge valve, an external location serving as a cooled part, and between the outlet of the high-pressure tank and the inlet of the external location. an interposed flow rate regulating valve, an inlet valve whose outlet is connected to the second cold room or the first regenerator, and a low-pressure tank interposed between the outlet of the external location and the intake valve. A refrigeration system consisting of

(Function) With this configuration, a part of the working gas in the cold room 1 is transferred to the discharge valve 5.
The high-pressure gas stored in the high-pressure tank 5 is regulated by the flow control valve 1 and heated through the external point 8 by cooling it, and then the high-pressure gas is stored in the high-pressure tank 5. 11, and the low pressure gas accumulated in this low pressure tank flows into the cold room 17 via the suction valve 6. Therefore, the working gas in the high-pressure tank flows through the external location at a constant flow rate regardless of pressure fluctuations in the cold chamber 1, cooling it, and the heated gas enters the cold chamber 17 containing the working gas at the same temperature, thereby reducing entropy. Since it does not increase the temperature, the drawbacks of the conventional method are eliminated.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a multi-stage refrigerator 20 includes a first cold chamber 1, which is the final stage, a second cold chamber 16, and a compression chamber 2. A first regenerator 17 is interposed between the first cold room 1 and the second cold room 16. Further, a second regenerator 3 and a cooler 4 are interposed between the second cold room 16 and the compression chamber 2.

The first cold chamber 1 is connected to the inlet of a discharge valve 5 , and the outlet of the discharge valve 5 is connected to the high-pressure tank 9 via a conduit 7 . The outlet of the high-pressure tank 9 is connected via a conduit 12, a flow control valve 10 and a conduit 13 to the inlet of the external location 8, which is the object to be cooled. The outlet of the external location 8 is thus connected via the conduit 14, the low-pressure tank 11 and the conduit 15 to the inlet of the suction valve 6, and the outlet of the suction valve 6 is connected to the second cold chamber 16.

The volume of the cold chamber 1.16 and the compression chamber 2 changes with a phase difference of approximately 90 degrees, and the working gas reciprocates between the compartments through the regenerator 3.17 and the cooler 4, thereby controlling the operation of the cold chambers 1 and 16. The gas becomes colder. A part of the low temperature working gas in the cold room 1 enters the high pressure tank 9 through the discharge valve 5, and this low temperature high pressure gas flows to the external location 9 at a constant flow rate through the flow regulating valve 10. At this time, the low-temperature high-pressure gas undergoes Joule-Thomson expansion by the flow rate regulating valve 10, becomes even lower temperature, is cooled, enters the low-pressure tank 11, and passes through the suction valve 6 from the low-pressure tank 11 to the next second gas. Enter cold room 16.

Incidentally, as shown in FIG. 2, the heat storage device 17 is
The low pressure tank 11 may be connected to the low pressure tank 11.

〔Effect of the invention〕

In order to eliminate the drawbacks of the prior art, another refrigerator A is provided in addition to the refrigerator R mentioned above, and the temperature of the working gas in the cold chamber of this refrigerator A is controlled by the outlet of the intake valve of the refrigerator R. Freezer A
It is also conceivable to connect it to a cold room. However, this system has a problem in that it requires a refrigerator A in addition to the refrigerator R. However, in the present invention, the refrigerator is multi-stage, the cold chamber of the final stage is connected to the discharge valve, and the cold chamber of the final stage is connected to the discharge valve. The temperature of the gas entering through the intake valve is approximately equal to the temperature of the gas in the cold chamber by communicating the cold chamber in the previous stage with the suction valve, thereby achieving the unique effect that entropy does not increase even when the two gases are mixed. Therefore, the problem of having one extra refrigerator does not arise.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a first embodiment of a refrigeration system according to the present invention, FIG. 2 is a diagram of a second embodiment of a refrigeration system according to the present invention, and FIG. 3 is an explanatory diagram of a conventional system. DESCRIPTION OF SYMBOLS 1... First cold room, 2... Compression chamber, 3... Second regenerator, 5... Discharge valve, 6... Suction valve. 8... External location, 9... High pressure tank, 10... Flow control valve, 11... Low pressure tank, 17... First regenerator

Claims (1)

[Claims] The first cold room is the final stage, and the second cold room has a higher temperature than the first cold room.
A cold room, a compression room, a first regenerator interposed between the two cold rooms, and a second regenerator interposed between the second cold room and the compression chamber, and the working gas is A low temperature is transferred between the first cold room and the compression chamber via the first cold storage, the second cold room, and the second cold storage, and the low temperature is transferred to the first cold room and the second cold room. A refrigerator to be generated: a discharge valve whose inlet is connected to the first cold room; a high-pressure tank whose inlet is connected to the outlet of the discharge valve; an external location as a part to be cooled: an outlet of the high-pressure tank and the external location. A flow rate control valve interposed between the inlet and the inlet; a suction valve whose outlet is connected to the second cold room or the first regenerator; and a flow control valve interposed between the outlet of the external location and the inlet of the suction valve. A refrigeration system consisting of: a low pressure tank installed.