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Stirling cylic engine

An engine and working gas technology, applied in the direction of machines/engines, gas cycle refrigerators, hot gas variable displacement engine devices, etc., can solve problems such as heat loss and performance reduction of Stirling cycle refrigerators

Inactive Publication Date: 2004-02-25
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a large loss of heat, which reduces the performance of the Stirling cycle chiller

Method used

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  • Stirling cylic engine
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0034] figure 1 is a perspective view showing the manufacturing process of the regenerator 1 used in the first embodiment of the present invention. A cylindrical bobbin 3 passes through a support stand 25, and a thin-walled cylindrical outer casing 4 having a diameter larger than the cylindrical bobbin 3 is mounted around the cylindrical bobbin 3. The thin-walled cylindrical casing 4 is fixed to a support stand 25 with stoppers 24 . The thin-walled cylindrical casing 4 has a slit 5 vertically formed therein.

[0035]Next, one end of the resin film 2 is inserted through the slit 5, fixed to the outer surface of the cylindrical bobbin 3, and then the cylindrical bobbin 3 is rotated in the direction indicated by the arrow F1, thereby further turning the cylindrical bobbin 3 as shown by the arrow F2. A resin film is inserted through the slit 5 and wound around the outer surface of the cylindrical bobbin 3 . When the thus wound resin film 2 reaches the inner surface of the thin...

no. 2 example

[0041] When the free-piston Stirling cycle engine is operating, compressed hot working gas and expanded cold working gas flow through the regenerator 1 in a reciprocating motion. At the same time, heat is exchanged between the resin film 2 and the working gas. Here, the heat of the working gas flowing close to the inner surface of the thin-walled cylindrical jacket 4 is dissipated by conduction to the cylinder 6 through the thin-walled cylindrical jacket 4 . This results in a loss of heat in the cylinder 6, thus reducing the performance of the regenerator.

[0042] In order to avoid this situation, in the second embodiment of the present invention, compared with the first embodiment, the thin-walled cylindrical jacket 4 is made of high heat insulating material. Examples of highly insulating materials include resins such as polycarbonate and ceramics.

[0043] In this structure, the heat of the working gas flowing through the regenerator 1 is blocked by the thin-walled cylind...

no. 3 example

[0045] Fig. 3 is a side sectional view of a regenerator 1 used in a third embodiment of the present invention and parts surrounding it. Compared with the first embodiment, in the third embodiment, the outer surface surrounding the regenerator 1, that is, the outer surface surrounding the thin-walled cylindrical jacket 4, is equipped with O-rings 8 and 8' for sealing the thin-walled cylindrical The space between the outer cover 4 and the cylinder 6.

[0046] In this structure, the working gas is prevented from leaking between the thin-walled cylindrical jacket 4 and the inner surface of the cylinder 6 . In addition, a layer of air is formed between the thin-walled cylindrical casing 4 and the cylinder 6 by fitting O-rings 8 and 8' at both ends of the regenerator 1. This layer of air blocks the heat of the working gas so that it will not be dissipated due to conduction to the cylinder 6 through the thin-walled cylindrical jacket 4 . This increases the heat storage capacity of ...

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Abstract

In a Stirling cycle engine, a regenerator has a bobbin, a resin film wound around the outer surface of the bobbin, and a sheath fitted around the outer surface of the resin film and having a slit formed vertically therein. The resin film has one end fixed on the outer surface of the bobbin, and has the other end led out through the slit and fixed to an end surface of the slit or to the outer surface of the sheath. The sheath is press-fitted on the inner surface of the cylinder. Working gas flows between different layers of the resin film. This reduces the loss of heat due to gas leakage and thereby improves the heat exchange efficiency in the regenerator.

Description

technical field [0001] The present invention relates to a Stirling cycle engine provided with a regenerator which improves heat exchange efficiency. Background technique [0002] Such as Figure 6 As shown in , for example, a conventional Stirling cycle engine is provided with a regenerator, which consists of a cylindrical bobbin 3, a resin film 2 wound on the outer surface of the bobbin 3, and the resin film 2 Very minute unevennesses 11 are formed on the surface, leaving gaps between the different layers of the resin film 2 . These gaps are generated due to minute unevenness of the resin film 2 between different layers. Figure 7 It is a side cross-sectional view of an example of a free-piston Stirling cycle refrigerator provided with such a regenerator 1 . First, the structure and operation of this free-piston Stirling cycle refrigerator 14 will be described. [0003] Such as Figure 7 As shown in , the free-piston Stirling cycle refrigerator 14 is provided with a cyl...

Claims

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Application Information

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IPC IPC(8): F25B9/00F02G1/057F25B9/14F28D17/02
CPCF25B9/14F28D17/02F02G1/057F25B2309/003
Inventor 田中章三
Owner SHARP KK
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