Scroll compressor with reduced upsetting moment

Patent metadata

Field	Value
Publication number	US-9903370-B2
Application number	US-201514814263-A
Country	US
Kind code	B2
Filing date	Jul 30, 2015
Priority date	Nov 1, 2010
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A scroll compressor includes a pressing mechanism, a pushback mechanism and an adjustment mechanism. The pressing mechanism applies a pressing force toward a fixed scroll to the back side of an end plate portion of an orbiting scroll. The pushback mechanism applies a pushback force separating the orbiting scroll from a fixed scroll to the front of the orbiting scroll. The adjusting mechanism has a low-pressure portion filled with a fluid of a lower pressure than the discharge pressure of the compression mechanism, and a communicating groove formed in a sliding surface of an 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, and to be blocked from the low-pressure portion in a second rotational angle range other than the first rotational angle range.

First claim

What is claimed is:

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 wrap placed upright inside the outer peripheral portion, and
an 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 wrap of the fixed scroll, and a 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, and
a 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, and
to be blocked from the low-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 formed in the sliding surface of the outer peripheral portion of the fixed scroll to carry a flow of a lubricating oil with a high pressure corresponding to the discharge pressure of the compression mechanism,
the communicating groove being formed outside of the high-pressure side oil groove in a radial direction, and
oil in the high-pressure side oil groove flowing outside in the radial direction and being collected in the communicating groove.

2. The scroll compressor of claim 1 , wherein
the high-pressure side oil groove is formed in an arc shape extending in a circumferential direction of the fixed scroll, and
the communicating groove is formed in an arc shape so as to run along an arc of the high-pressure side oil groove.

Assignees

• Daikin Ind Ltd

Inventors

• Tsuka Yoshitomo
• Nishide Youhei
• Yamamoto Masateru

Classifications

• F04C23/008

  Hermetic pumps · CPC title

• F04C18/0261

  Details of the ports, e.g. location, number, geometry · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C29/0021 Primary

  Systems for the equilibration of forces acting on the pump (interstice adjustment other than by fluid pressure F01C21/102) · CPC title

• F04C18/0253

  Details concerning the base · CPC title