Scroll compressor
First Claim
1. A scroll compressor comprising:
- a casing housing a compression mechanism including a fixed and orbiting scrolls having respective involute wraps which matingly engage with each other and respective press-contact surfaces which press-contact each other in an axial direction;
a drive mechanism coupled, through a drive shaft to said orbiting scroll; and
a press-contact surface lubrication path which is formed in said orbiting scroll so as to communicate with said press-contact surfaces from a main lubrication path formed in said drive shaft, said press-contact surface lubrication path comprising a first pathway which communicates with said press-contact surfaces from inside of said orbiting scroll, a second pathway which communicates with said press-contact surfaces through a low-level pressure space of said casing, and a lubrication control mechanism which opens said first pathway and closes said second pathway when a difference between a high-level pressure and a low-level pressure within said casing exceeds a predetermined value, and which closes said first pathway and opens said second pathway when said high-low pressure difference is equal to or less than said predetermined value.
1 Assignment
0 Petitions
Accused Products
Abstract
A lubrication path to press-contact surfaces of a fixed and orbiting scrolls serves also as a high-level pressure introduction passageway when a difference between a high-level pressure and a low-level pressure is great. On the other hand, when the high-level pressure introduction passageway is blocked off in a state in which the high-low pressure difference is small, refrigerating machine oil is supplied to the press-contact surfaces through a low-level pressure space within the casing, for controlling the pressing force of the orbiting scroll against the fixed scroll, and the construction for preventing a decrease in efficiency is simplified, thereby not only reducing the cost but also preventing the occurrence of a maloperation.
-
Citations
3 Claims
-
1. A scroll compressor comprising:
-
a casing housing a compression mechanism including a fixed and orbiting scrolls having respective involute wraps which matingly engage with each other and respective press-contact surfaces which press-contact each other in an axial direction;
a drive mechanism coupled, through a drive shaft to said orbiting scroll; and
a press-contact surface lubrication path which is formed in said orbiting scroll so as to communicate with said press-contact surfaces from a main lubrication path formed in said drive shaft, said press-contact surface lubrication path comprising a first pathway which communicates with said press-contact surfaces from inside of said orbiting scroll, a second pathway which communicates with said press-contact surfaces through a low-level pressure space of said casing, and a lubrication control mechanism which opens said first pathway and closes said second pathway when a difference between a high-level pressure and a low-level pressure within said casing exceeds a predetermined value, and which closes said first pathway and opens said second pathway when said high-low pressure difference is equal to or less than said predetermined value. - View Dependent Claims (2, 3)
-
Specification