Cold accumulator type refrigeration machine

Abstract

The present invention relates to a cold accumulator type refrigerating machine which has a sealing member for sealing a cylinder and a displacer, and the object is to make the sealing balance become well and maintain the space for long time. The cold accumulator type refrigerating machine of the invention is provided with a cylinder (22), a displacer (23), a motor (M) for making the displacer reciprocate move in the cylinder (22) and guide members (35, 36) disposed on high temperature side and low temperature side of the displacer (23) for guiding the movement of the displacer (23).

Description

technical field [0001] The present invention relates to a regenerator type refrigerator, and more particularly to a regenerator type refrigerator in which a displacer (displacer) is reciprocated by a cylinder. Background technique [0002] FIG. 1 shows a conventional regenerator refrigerator as an example. Generally, regenerator type refrigerators are known as a single-stage type with a freezing temperature of 40K or higher and a two-stage type with a freezing temperature of 20K or lower. A single-stage regenerator type refrigerator 1 is shown in this figure. [0003] The regenerator refrigerator 1 is roughly constituted by a cylinder 2, a displacer 3, a regenerator material (or regenerator member) 4, a gas supply device 5, and the like. Inside the cylinder 2, a displacer 3 is provided reciprocally movable in the cylinder direction. A cool storage material 4 is arranged inside the displacer 3 . [0004] In addition, gas circulation holes 9 are formed in the upper part in ...

AI Technical Summary

Problems solved by technology

[0010] However, since the conventional regenerator refrigerator 1 has a structure in which sliding seals 12 and wearing parts 15 having different characteristics are disposed on the high temperature side and the low temperature side, the movement of the displacer 3 can be guided on the low temperature side. , but has the problem of not properly guiding the movement of the displacer 3 on the high temperature side

[0011] In addition, due to the displacement of the displacer 3 from the correct position on the high temperature side, there is a problem that the displacer 3 is in sliding contact with the cylinder 2, and partial wear occurs.

[0012] In addition, when performing maintenance, it is necessary to use the sliding seal 12, which wears faster than the wearing part 15, as a reference, and there is also the problem of short maintenance intervals.

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