A variable capacity rotary compressor including a hermetic casing, and a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities. A compressor is placed in the first and second compression chambers and operated to execute a compres
A variable capacity rotary compressor including a hermetic casing, and a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities. A compressor is placed in the first and second compression chambers and operated to execute a compression operation in either the first or second compression chamber according to a rotating direction of a rotating shaft which drives the compressing unit. A pressure controller applies the outlet pressure of the compressor to the first or second compression chamber where an idle operation is executed, and has a path control chamber provided at a portion of the housing outside the first and second compression chambers. First and second inlet channels connect both ends of the path control chamber to inlet ports of the first and second compression chambers, respectively. A communicating channel connects an outlet side of the compressor to the path control chamber. A valve unit, in the path control chamber, controls an internal path of the path control chamber.
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What is claimed is: 1. A variable capacity rotary compressor, including a hermetic casing, a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities, and a compressing unit, placed in the first and second compression chambers, to
What is claimed is: 1. A variable capacity rotary compressor, including a hermetic casing, a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities, and a compressing unit, placed in the first and second compression chambers, to execute a compression operation in either the first or second compression chamber according to a rotating direction of a rotating shaft which drives the compressing unit, the variable capacity rotary compressor comprising: a pressure controller to apply an outlet pressure of the compressor to either the first or second compression chamber where an idle operation is executed, the pressure controller comprising: a path control chamber provided at a portion of the housing outside the first and second compression chambers, first and second inlet channels to connect both ends of the path control chamber to inlet ports of the first and second compression chambers, respectively, a communicating channel to connect an interior of the hermetic casing of the compressor to a middle portion of the path control chamber, and a valve unit provided in the path control chamber to control an internal path of the path control chamber so that the communicating channel communicates with either the first or second inlet channel. 2. The variable capacity rotary compressor according to claim 1, wherein the valve unit comprises a valve member, which reciprocates in the path control chamber. 3. The variable capacity rotary compressor according to claim 2, wherein the valve unit further comprises first and second valve seats which are provided on the ends of the path control chamber, respectively, each of the first and second valve seats having a hole at a center thereof. 4. The variable capacity rotary compressor according to claim 1, wherein the housing comprises: a first housing to define the first compression chamber therein; a second housing to define the second compression chamber therein; and a partition interposed between the first and second housings so that the first and second compression chambers are partitioned from each other. 5. The variable capacity rotary compressor according to claim 4, wherein the first compression chamber has a higher capacity than the second compression chamber, and the path control chamber is provided at a portion of the first housing, and the second inlet channel is provided at a portion of the partition to allow the path control chamber to communicate with the inlet port of the second compression chamber. 6. The variable capacity rotary compressor according to claim 5, wherein the communicating channel is provided at a portion of the first housing, with an inlet of the communicating channel being open to communicate with an interior of the hermetic casing. 7. A pressure controller of a variable capacity rotary compressor, which includes a hermetic casing, encased first and second compression chambers, and a compressing unit in the first and second compression chambers, to execute a compression operation in either the first or second compression chamber according to a rotating direction of a rotating shaft, to apply an outlet pressure of the compressor to either the first or second compression chamber where an idle operation is executed, the pressure controller comprising: a path control chamber outside the encased first and second compression chambers; first and second inlet channels to connect both ends of the path control chamber to inlet ports of the first and second compression chambers, respectively; a communicating channel to connect an interior of the hermetic casing of the compressor to a middle portion of the path control chamber; and a valve unit provided in the path control chamber to control an internal path of the path control chamber so that the communicating channel communicates with either the first or second inlet channel. 8. The pressure controller according to claim 7, wherein the valve unit comprises a valve member which reciprocates in the path control chamber. 9. The pressure controller according to claim 8, wherein the valve unit further comprises first and second valve seats provided on the ends of the path control chamber, respectively. 10. The pressure controller according to claim 9, wherein each of the first and second valve seats includes a hole at a center thereof. 11. The pressure controller according to claim 7, further comprising a housing which define the first and second compression chambers, wherein the housing comprises: a first housing including the first compression chamber; a second housing including the second compression chamber; and a partition interposed between the first and second housings to partition the first and second compression chambers. 12. The pressure controller according to claim 11, wherein the first compression chamber has a higher capacity than the second compression chamber. 13. The pressure controller according to claim 12, wherein the path control chamber is provided at a portion of the first housing. 14. The pressure controller according to claim 13, wherein the second inlet channel is provided at a portion of the partition to allow the path control chamber to communicate with the inlet port of the second compression chamber. 15. The pressure controller according to claim 14, wherein the communicating channel is provided at a predetermined portion of the first housing. 16. The pressure controller according to claim 15, further comprising an inlet of the communicating channel is open to communicate with the interior of the hermetic casing.
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이 특허에 인용된 특허 (3)
Suzuki Sou (Shizuoka City JPX) Sakaino Keiju (Shizuoka City JPX) Kawasaki Katsuyuki (Shizuoka City JPX) Shirafuji Yoshinori (Shizuoka City JPX) Ogawa Hiroshi (Shizuoka City JPX) Nagashima Hiroyuki (S, Multicylinder rotary compressor.
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