Mitsubishi Heavy Industries Thermal Systems, Ltd.

Genta Yoshikawa

Hajime Sato

Makoto Takeuchi

Kazuhide Watanabe

Takayuki Hagita

Katsuhiro Fujita

Takayuki Kuwahara

Takuma Yamashita

Akihiro Kanai

A scroll compressor with a stationary scroll, an orbiting scroll, and a discharge port through which a fluid that has been compressed by both the scrolls is discharged. An end plate of the orbiting scroll is provided with an end-plate side stepped portion formed such that, along a spiral of a spiral wrap, the height thereof increases toward a central side of the spiral and decreases toward an outer end side thereof. A spiral wrap of the stationary scroll is provided with a wall-portion side stepped portion formed corresponding to the end-plate side stepped portion such that the height thereof decreases toward the central side of the spiral and increases toward the outer end side thereof. A pair of compression chambers face each other. The ventral side compression chamber communicates with the discharge port before the dorsal side compression chamber communicates with the discharge port.

Scroll compressor including end-plate side stepped portions of each of the scrolls corresponding to wall-portion side stepped portions of each of the scrolls

A scroll compressor comprising a fixed scroll (); an orbiting scroll () supported in a manner allowing for orbiting motion; a discharge port through which a fluid compressed by the two scrolls () is discharged; an end plate step portion (E) provided on an end plate of the orbiting scroll () formed so that a height of the end plate is higher on a center portion side in the direction of a spiral wrap and lower on an outer end side; and a wrap step portion (E) provided on a wall portion of the fixed scroll () that corresponds to the end plate step portion (E) so that a height of the wall portion is lower on the center portion side of the spiral and higher on the outer end side; wherein the orbiting scroll () is treated for surface hardening and the fixed scroll () is not treated for surface hardening.

Scroll compressor including fixed and orbiting scroll having stepped portions and a surface hardened treatment

A scroll compressor with a stationary scroll, an orbiting scroll, and a discharge port through which a fluid that has been compressed by both the scrolls is discharged. An end plate of the orbiting scroll is provided with an end-plate side stepped portion formed such that, along a spiral of a spiral wrap, the height thereof increases toward a central side of the spiral and decreases toward an outer end side thereof. A spiral wrap of the stationary scroll is provided with a wall-portion side stepped portion formed corresponding to the end-plate side stepped portion such that the height thereof decreases toward the central side of the spiral and increases toward the outer end side thereof. A pair of compression chambers which face each other, the ventral side compression chamber communicates with the discharge port before the dorsal side compression chamber communicates with the discharge port.

Scroll compressor including fixed and orbiting scrolls having different heights and surface hardenings

One of a pair of a fixed scroll and an orbiting scroll is the scroll including a step portion provided only at a predetermined position along a spiral direction on a blade bottom surface of a spiral wrap, and the other one of the scrolls is the scroll including a step portion provided only at a predetermined position along a spiral direction on a blade tip surface of a spiral wrap. A blade bottom surface of an end plate of the fixed scroll is set as a reference surface for setting a chip gap between both the scrolls. When a wrap height of the spiral wrap of the orbiting scroll is represented by (L) (Lo, Li) and a wrap height of the spiral wrap of the fixed scroll is represented by (lo, li), L (Lo, Li)&#x3e;1 (lo, li) is satisfied.

Scroll fluid machine including a pair of fixed scrolls and an orbiting scroll

In a scroll compressor that forms two suction volume parts by engaging paired fixed scroll and turning scroll with each other while scroll laps respectively erected on end plates of the fixed scroll and the turning scroll are opposed to each other and driving the turning scroll to revolve around the fixed scroll, out of the two suction volume parts, one of the suction volume parts that is formed close to a suction port provided in a housing is made larger than the other suction volume part.

Growing community of inventors

Tokyo, Japan

Genta Yoshikawa