Compression mechanism and scroll compressor including the same
AssigneeDaikin Industries, Ltd.
InventorsSatoshi Yamamoto, Mikio Kajiwara, Mitsuhiko Kishikawa, Hiroyuki Yamaji, Mie Arai, Yasuhiro Murakami
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Abstract
A compression mechanism is configured to be used in a scroll compressor. The compression mechanism includes a fixed scroll and a movable scroll. One of the fixed scroll and the movable scroll is a cast iron molding fabricated through semi-molten die casting, and the other of the fixed scroll and the movable scroll is a grey iron casting.
Claims14
A compression mechanism configured to be used in a scroll compressor, the compression mechanism comprising:
- a fixed scroll;
- and
- a movable scroll,
- one of the fixed scroll and the movable scroll being a cast iron molding fabricated through semi-molten die casting, and
- the other of the fixed scroll and the movable scroll being a grey iron casting, the grey iron casting being constructed of a different material than the cast iron molding, and the cast iron molding having higher strength and higher stiffness than the grey iron casting.
A compression mechanism configured to be used in a scroll compressor, the compression mechanism comprising:
- a fixed scroll;
- and
- a movable scroll,
- one of the fixed scroll and the movable scroll being a cast iron molding fabricated through semi-molten die casting,
- the other of the fixed scroll and the movable scroll being a grey iron casting, and
- a sum of a first graphite area ratio and a second graphite area ratio being greater than or equal to 10% and less than or equal to 20%, the first graphite area ratio being on a surface of the cast iron molding, and the second graphite area ratio being on a surface of the grey iron casting.
A compression mechanism configured to be used in a scroll compressor, the compression mechanism comprising:
- a fixed scroll;
- and
- a movable scroll,
- one of the fixed scroll and the movable scroll being a cast iron molding fabricated through semi-molten die casting,
- the other of the fixed scroll and the movable scroll being a grey iron casting, and
- a tensile strength of the grey iron casting being greater than or equal to 250N/mm2 and less than 300N/mm2.
A compression mechanism configured to be used in a scroll compressor, the compression mechanism comprising:
- a fixed scroll and
- a movable scroll,
- one of the fixed scroll and the movable scroll being a cast iron molding fabricated through semi-molten die casting.
- the other of the fixed scroll and the movable scroll being a grey iron casting
- the fixed scroll having a first scroll portion, and the movable scroll having a second scroll portion, the first and second scroll portions extending in involute shapes, and the first scroll portion engaging with the second scroll portion,
- a thickness ratio of a first thickness to a second thickness being calculated based on a Young's modulus ratio of a Young's modulus of the cast iron molding to a Young's modulus of the grey iron casting, and
- the first thickness being the thickness of the first or second scroll portion of the cast iron molding, and the second thickness being the thickness of the first or second scroll portion of the grey iron casting.
Dependencies are inferred from the claim text.