| US 7,540,720 B2 | ||
| Heat-insulating mechanism for compressor | ||
| Fuminobu Enokijima, Kariya (Japan); Masaki Ota, Kariya (Japan); Tetsuhiko Fukanuma, Kariya (Japan); Masakazu Murase, Kariya (Japan); Tatsuya Koide, Kariya (Japan); and Masahiro Kawaguchi, Kariya (Japan) | ||
| Assigned to Kabushiki Kaisha Toyota Jidoshokki, Aichi-ken (Japan) | ||
| Filed on Nov. 16, 2004, as Appl. No. 10/990,234. | ||
| Claims priority of application No. 2003-387207 (JP), filed on Nov. 17, 2003. | ||
| Prior Publication US 2005/0106033 A1, May 19, 2005 | ||
| Int. Cl. F04B 1/12 (2006.01); F04B 27/08 (2006.01) | ||
| U.S. Cl. 417—269 [417/312; 417/313] | 9 Claims |
| 1. A heat-insulating mechanism in a compressor which introduces refrigerant gas from a suction pressure region to a compression
chamber and discharges the refrigerant gas from the compression chamber to a discharge pressure region, comprising:
a circular passage, which is a portion of the suction pressure region, having a circular cross-section, the circular passage
being in communication with an external refrigerant circuit;
a communication passage, which is a portion of the suction pressure region, intersecting the circular passage for connection
therewith, the communication passage being communicable with the compression chamber;
a cylindrical member rotatably fitted into the circular passage; and
a passage heat-insulating member made of an insulating material, the passage heat-insulating member covering at least a portion
of a passage wall surface which forms the communication passage, and rotation of the cylindrical member being prevented by
engaging the passage heat-insulating member with the cylindrical member,
wherein the cylindrical member has a communication hole which is in communication with the communication passage, and wherein
the passage heat-insulating member is fitted into the communication hole of the cylindrical member.
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