Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1995-09-29
1997-10-07
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 554, 418 555, 418 57, 418181, F04C 1804, F04C 2906
Patent
active
056740611
ABSTRACT:
The invention concerns a scroll compressor which is low in noise caused by water hammering of a refrigerant gas just after a discharge valve is closed. The scroll compressor includes a discharge member (45) having a discharge port (8) opposed to a discharge port (5) of a fixed scroll (2) and a discharge valve (9) opposed to the discharge port (8) of the discharge member (45) and opened/closed depending on a difference between flow passage pressure of a refrigerant gas and pressure in a high pressure space (27) in a sealed vessel (1). At least either of the fixed scroll (2) and the discharge member (45) is formed with a muffler chamber communicated with the discharge port (5, 8) and having a diameter larger than a diameter of the discharge port (5) of the fixed scroll (2) for suppressing occurrence of an impulse wave caused by water hammering when the discharge valve (9) is closed. Noise caused by a pressure ripple of the discharge port lessens, quieting the operation of the scroll compressor.
REFERENCES:
patent: 4427351 (1984-01-01), Sano
patent: 5090880 (1992-02-01), Mashimo
patent: 5137437 (1992-08-01), Machida et al.
patent: 5346375 (1994-09-01), Akiyama et al.
Ikeda Kiyoharu
Kakuda Masayuki
Motegi Shuji
Nakamura Toshiyuki
Nakashima Shinji
Mitsubishi Denki & Kabushiki Kaisha
Vrablik John J.
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