| 主权项 |
1. A scroll compressor comprising:
a casing; a compression mechanism contained in the casing, the compression mechanism including
a fixed scroll having an end plate portion, an outer peripheral portion formed on an outer periphery of the end plate portion, and a fixed wrap placed upright at a location radially inside of the outer peripheral portion, andan orbiting scroll having an end plate portion slidably contacting with the outer peripheral portion of the fixed scroll and a front end portion of the fixed wrap of the fixed scroll, and an orbiting wrap placed upright on the end plate portion; a pressing mechanism arranged to apply a pressing force toward the fixed scroll to a back side of the end plate portion of the orbiting scroll; a pushback mechanism arranged to apply a pushback force separating the orbiting scroll from the fixed scroll to a front of the end plate portion of the orbiting scroll; and at least one adjusting mechanism having
a low-pressure portion filled with a fluid of lower pressure than a discharge pressure of the compression mechanism, anda communicating groove formed in a sliding surface of the outer peripheral portion of the fixed scroll so as
to communicate with the low-pressure portion in a first rotational angle range in order to reduce an upsetting moment of the orbiting scroll, andto be blocked from the tow-pressure portion in a second rotational angle range other than the first rotational angle range the pushback mechanism including a high-pressure side oil groove which is formed in the sliding surface of the outer peripheral portion of the fixed scroll, and the communicating groove being formed on the outside in a radial direction of the high-pressure side oil groove; the adjusting mechanism including a concave recess formed in a sliding surface of the end plate portion of the orbiting scroll and a suction port as the low-pressure portion in order to suck the fluid into the compression mechanism, and the adjusting mechanism being configured such that
when the orbiting scroll comes into the first rotational angle range, an inside of the concave recess is in a position at which the concave recess communicates with both of the suction port and the communicating groove, andwhen the orbiting scroll comes into the second rotational angle range, the inside of the communicating concave recess is in a position blocked from at least one of the suction port and the communicating groove. |
