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An external heat exchanger is used to transfer heat from a compressor lubricant to an expanded working fluid, thereby cooling the lubricant. The heat exchanger may also be used to sub-cool condensed working fluid with the same flow of expanded working fluid. A horizontal scroll-type compressor inclu

An external heat exchanger is used to transfer heat from a compressor lubricant to an expanded working fluid, thereby cooling the lubricant. The heat exchanger may also be used to sub-cool condensed working fluid with the same flow of expanded working fluid. A horizontal scroll-type compressor includes an intermediate lubricant sump between a main bearing support and a scroll member. A counterweight on the crankshaft can travel through the lubricant in the intermediate sump to splash the lubricant around. A horizontal scroll-type compressor can include multiple machined surfaces that are utilized to precisely center and align components of the compressor.

대표청구항 ▼

1. A system comprising: a compressor compressing a working fluid from a suction pressure to a discharge pressure greater than said suction pressure;a lubricant lubricating said compressor;a condenser condensing said working fluid discharged by said compressor;an expansion device expanding said worki

1. A system comprising: a compressor compressing a working fluid from a suction pressure to a discharge pressure greater than said suction pressure;a lubricant lubricating said compressor;a condenser condensing said working fluid discharged by said compressor;an expansion device expanding said working fluid condensed by said condenser;a first heat exchanger coil receiving said lubricant and being in heat transfer relation with expanded working fluid;a second heat exchanger coil receiving condensed working fluid and being in heat transfer relation with said expanded working fluid; anda third heat exchanger coil receiving said expanded working fluid and a fourth heat exchanger coil receiving said expanded working fluid, wherein said first and third heat exchanger coils are disposed in a first heat exchanger transferring heat from said lubricant to said expanded working fluid and said second and fourth heat exchanger coils are disposed in a second heat exchanger transferring heat from said condensed working fluid to said expanded working fluid,wherein said expanded working fluid flows through said first heat exchanger after flowing through said second heat exchanger. 2. The system of claim 1, wherein said condensed working fluid is in a liquid state and said expanded working fluid is in one of a vapor state and a two-phase liquid and vapor state. 3. The system of claim 1, wherein said first, and second heat exchanger coils are disposed in a single heat exchanger unit that simultaneously transfers heat to said expanded working fluid from both said lubricant and said condensed working fluid, said expanded working fluid being received in a third heat exchanger coil disposed in said single heat exchanger unit. 4. The system of claim 3, wherein said single heat exchanger unit is mounted to said compressor. 5. The system of claim 1, further comprising an intermediate-pressure location in said compressor receiving expanded working fluid after heat is transferred between said expanded working fluid and at least one of said lubricant and said condensed working fluid. 6. The system of claim 1, wherein said compressor includes at least one of a high-side lubricant sump and a low-side lubricant sump. 7. The system of claim 6, wherein said compressor includes a shell, a compression mechanism, a bearing support, and a thrust plate, said low-side lubricant sump being defined by said thrust plate, said bearing support, and said shell. 8. The system of claim 6, wherein said first heat exchanger coil receives lubricant from said high-side lubricant sump. 9. The system of claim 6, wherein said compressor includes a crankshaft having a counterweight rotating with said crankshaft, said counterweight traveling through lubricant in said low-side lubricant sump during rotation of said crankshaft and splashing said lubricant therein. 10. The system of claim 1, wherein said compressor includes a single one-piece shell having axially opposite first and second ends, said shell including: a main bearing support having a bore for supporting a portion of a crankshaft;a continuous annular surface on an interior of said shell immediately adjacent said first end; anda plurality of axially extending arcuate surfaces adjacent said second end, said plurality of arcuate surfaces being circumscribingly spaced apart along said interior of said shell. 11. The system of claim 1, further comprising a separator disposed within said compressor and configured to separate said lubricant from said working fluid within said compressor. 12. An apparatus comprising: a shell;a compression mechanism disposed within said shell and compressing a working fluid;a lubricant sump;a first heat exchanger conduit receiving said working fluid discharged from said compression mechanism;a second heat exchanger conduit receiving lubricant from said lubricant sump, said lubricant in said second heat exchanger conduit being in heat transfer relation with said working fluid;a third heat exchanger conduit receiving said working fluid and in heat transfer relation with said working fluid in said first heat exchanger conduit; anda fourth heat exchanger conduit receiving said working fluid and in heat transfer relation with said working fluid in said second heat exchanger conduit,wherein said first and third heat exchanger conduits are disposed in a second heat exchanger transferring heat from condensed working fluid to expanded working fluid, and wherein said second and fourth heat exchanger conduits are disposed in a first heat exchanger transferring heat from said lubricant to expanded working fluid, and wherein said expanded working fluid flow through said first heat exchanger after flowing through said second heat exchanger. 13. The apparatus of claim 12, wherein said shell includes first and second inlets and first and second outlets, said compression mechanism receiving said working fluid at a first pressure from said first inlet and discharging working fluid at a second pressure that is higher than said first pressure through said first outlet, said lubricant sump being in communication with said second inlet and said second outlet. 14. The apparatus of claim 13, wherein said shell includes a third inlet receiving working fluid at an intermediate pressure that is greater than said first pressure and less than said second pressure. 15. The apparatus of claim 14, wherein said third inlet is in communication with said first heat exchanger conduit. 16. The apparatus of claim 14, wherein said compression mechanism includes an orbiting scroll and a non-orbiting scroll meshingly engaging said orbiting scroll to define a plurality of fluid pockets therebetween, said third inlet being in communication with at least one of said fluid pockets. 17. The apparatus of claim 12, wherein said second heat exchanger is mounted to said shell. 18. The apparatus of claim 12, wherein said first heat exchanger conduit receives expanded working fluid and said third heat exchanger conduit receives condensed working fluid. 19. The apparatus of claim 18, wherein said condensed working fluid is in a liquid state and said expanded working fluid is in one of a vapor state and a two-phase liquid and vapor state. 20. The apparatus of claim 12, wherein said lubricant sump is disposed within said shell. 21. A method comprising: operating a compressor to compress a working fluid from a first pressure to a second pressure;providing lubricant in said compressor;separating said lubricant from said working fluid;routing said working fluid and said lubricant through a first heat exchanger, said working fluid and at least a portion of said lubricant being fluidly isolated from each other in said first heat exchanger;condensing said working fluid prior to routing said working fluid through said first heat exchanger;expanding a first portion of said condensed working fluid prior to routing said working fluid through said first heat exchanger;transferring heat between said lubricant and expanded working fluid in said first heat exchanger;transferring heat from a second portion of said condensed working fluid to said expanded working fluid in a second heat exchanger, said second portion of said condensed working fluid being fluidly isolated from each other in said second heat exchanger;routing said working fluid and said lubricant from said first heat exchanger to said compressor; androuting said expanded working fluid from said second heat exchanger to said first heat exchanger. 22. The method of claim 21, further comprising discharging said working fluid from said compressor through a first outlet in said compressor and discharging said lubricant from said compressor through a second outlet in said compressor. 23. The method of claim 21, wherein routing said working fluid to said compressor includes routing expanded working fluid to an intermediate-pressure location of said compressor. 24. The method of claim 21, wherein said lubricant is separated from said working fluid within said compressor.