Carrier Corporation

Scroll Technologies

Copeland Corporation

Bitzer Kuehlmaschinenbau Gmbh

Bitzer Scroll, Inc.

Other

Carrier Corpooration

James William Bush

Thomas R Barito

Zili Sun

John Robert Williams

Jason J Hugenroth

Carlos Armando Zamudio

Joe T Hill

Alexander Lifson

Wayne P Beagle

Greg Hahn

Jean-Luc M Caillat

Roger C Weatherston

Keshava Basavapatna Kumar

Reng Rong Lin

Gregory William Hahn

Ronald J Duppert

Hussein Ezzat Khalifa

Harry E Eaton

Clark VanTine Cooper

Philip H McCluskey

Biswajit Mitra

Ronald T Drost

Hong Du

Bruce A Fraser

Mark A Daniels

William Herve Rousseau

David C Baumann

Paula R DeBlois, Legal Representative

Donald Yannascoli

Gary J Anderson

Timothy C Wagner

Jason K Torrisi

Robert Wilson

Michael F Taras

Howard H Fraser, Jr

James F Fogt

Stephen L Shoulders

Kurt William Robert Bessel

Russell George Lewis

Steven James Holden

Raymond L DeBlois

Thomas S Katra

Yan Tang

Patrick C Marks

Xianghong Wang

Alexander D Leyderman

Erric L Heitmann

Francis P Wilson

Kenneth D Heusler

Gary W Schober

Edward A Tomayko

Raymond B Chadwick

Joseph T Hill

Timothy Przygoda

Tim Wagner

Boris Sheyer

Donald Yannoscoli

Rene Lin

Douglas J Sheahan

Gregory V Hahn

Andrea B Dacosta

Paula R DeBlois

Christopher Symanski

Mark E Housman

Gerald D Reichert

Antonio Prince

Christopher R Galante

Donald Yannnascoli

A scroll-type displacement machine, e.g. scroll compressor, has fixed and orbiting scrolls and an Oldham ring to prevent relative rotation between scrolls. A drive module positioned between the orbiting scroll and drive shaft incorporates an eccentric drive system and first and second counterweights for dynamic balancing. The motor, motor bearings, and motor shaft (i.e., drive shaft) are packaged as a separate, modular unit (e.g. 'off-the-shelf' motor) that attaches to the compressor frame. The machine is configured as a high-side machine with a low-pressure port at a radial outer portion of the fixed scroll and a high-pressure port or discharge port located in the floor of the orbiting scroll at its axis, with high pressure flow passing over and around the eccentric drive bearing and drive mechanism. The Oldham ring is distributed on a lateral or radial plane of the scroll pair with a portion surrounding a portion of the fixed scroll and another portion surrounding a portion of the orbiting scroll. The ring may be formed as four arcuate members arranged on two levels, to occupy otherwise unused space in the scroll-type machine.

Scroll-type machine

A refrigeration system with at least three compressors connected in a circuit. Each compressor has a housing with an oil sump. The oil sump is adapted to contain oil that defines an oil level. A supply line supplies refrigerant and entrained oil to each of the at least three compressors. The oil sump of each compressor has at least one oil port. Each oil port is disposed at an elevation that is equal to or minimally higher than the level of oil to promote equalization of oil levels in each compressor. There are a plurality of separate conduits which are not directly connected, but connected through the oil sumps of separate compressors. At least one compressor includes an oil sump extension having connections for the separate conduits. Each oil port is connected to the separate conduits or an oil sump extension. Each separate conduit connects a pair of compressors.

Oil equalization configuration for multiple compressor systems containing three or more compressors

A method of operating a refrigeration system having at least three compressors, in which each compressor has an oil sump with oil at an oil level. The method includes separately connecting the oil sumps of the at least three compressors. Each separate connection allows oil flow only between the oil sumps of two of said compressors thereby preventing bypass flow. The method further includes flowing oil between oil sumps of the at least three compressors and along the separate connections to tend to equalize the oil levels among the oil sumps of the at least three compressors.

A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing. The scroll bodies include a first scroll body and a second scroll body. The first and second scroll bodies have respective bases and respective scroll ribs that project from the respective bases. Further, the scroll ribs mutually engage such that the second scroll body is movable relative to the first scroll body to compress fluid. A drive shaft has an eccentric drive pin configured to engage a drive hub on the second scroll body. The scroll compress also includes a slider block that fits over the drive pin. The slider block has a first drive surface configured to engage a second drive surface of the drive pin. In particular embodiments, the slider block can tilt about one or more edges of the second drive surface when the drive shaft is deflected under load.

Scroll compressor with tilting slider block

A scroll compressor includes a fixed scroll compressor body and a moveable scroll compressor body that are arranged for relative orbital movement relative to one another to facilitate compression of refrigerant. The scroll compressor includes a key coupling acting upon the moveable scroll compressor body. The key coupling includes a ring body with a plurality of keys, with key contact surfaces, each of the keys projecting axially from the ring body. The key coupling includes four keys in separate quadrants defined by perpendicular lateral axes. The key coupling guides orbital movement of the moveable scroll compressor body along a linear translational path along a lateral axis.

Key coupling and scroll compressor incorporating same

A scroll compressor that includes a shell and scroll compressor bodies disposed in the shell. The scroll bodies include a first scroll body and a second scroll body, where the first and second scroll bodies have respective bases and respective scroll ribs that project from the respective bases. The scroll ribs are configured to mutually engage, and the second scroll body is movable relative to the first scroll body for compressing fluid. A pilot ring engages a perimeter surface of the first scroll body to limit movement of the first scroll body in the radial direction. Further, the shell includes different inner diameters to facilitate press fitting a motor into the shell where the motor includes lubricant flow passages.

Compressor with oil return passage formed between motor and shell

A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing. The scroll bodies include a first scroll body and a second scroll body, where the first and second scroll bodies have respective bases and respective scroll ribs that project from the respective bases. The scroll ribs are configured to mutually engage, and the second scroll body is movable relative to the first scroll body for compressing fluid. A pilot ring engages a perimeter surface of the first scroll body to limit movement of the first scroll body in the radial direction. Further, the first scroll body has a radially-outward-projecting limit tab which abuts a portion of the pilot ring to limit movement of the first scroll body in one of the axial and rotational directions.

Piloted scroll compressor

A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing. A motor is disposed within the housing and operably connected to a drive shaft for driving one of the scroll compressor bodies. The drive shaft is rotationally supported at one end by a crankcase which includes a bearing housing and a bearing. The crankcase includes a plurality of openings or gas passages passing through the crankcase, as well as a plurality of generally cylindrical sections positioned respectively between adjacent openings. The cylindrical sections define contact regions which can engage an inner periphery of the housing when the crankcase is mounted therein.

Press-fit bearing housing with large gas passages

A counterweight mounted to a drive shaft in a scroll compressor is provided. The drive shaft has a central annular segment generally concentric about the central axis and an eccentric annular segment offset from the central axis that can be used for driving the movable scroll compressor body. A counterweight engages the eccentric and also engages the annular segment for location and mounting of the counterweight to the shaft.

Shaft mounted counterweight, method and scroll compressor incorporating same

A scroll compressor includes scroll compressor bodies with axial tip seals projecting from the respective scroll ribs of fixed and movable scroll compressor bodies. An extended thrust region is provided in surrounding relation to an inner axial tip sealing region to provide for carrying thrust loads in the event that the scroll compressor bodies are forced axially together. Part of the thrust region may carry a tip seal, while another part may be free of a tip seal. This provides for at least a nominal reverse operation capability.

Scroll compressor bodies with scroll tip seals and extended thrust region

A refrigerant vapor compression system includes a flash tank receiver disposed in the refrigerant circuit intermediate the refrigerant cooling heat exchanger and the refrigerant heating heat exchanger. The flash tank receiver, which receives a liquid/vapor refrigerant mix, also functions as a receiver. A refrigerant charge control apparatus includes at least one sensor for sensing an operating characteristic of the refrigerant circulating through the refrigerant compression device, and a controller operative to selectively adjust a secondary expansion device to increase or decrease the flow of refrigerant passing into the flash tank receiver to provide a circulating refrigerant charge consistent with maintaining a desired system operating characteristic. The sensed operating characteristic is at least one of (a) the vapor refrigerant passing through a refrigerant line from the flash tank receiver to an intermediate pressure stage of the compression device, and (b) the refrigerant discharged from the compression device.

Refrigerant vapor compression system with flash tank receiver

A refrigeration system (A) comprises an evaporator (), a two-stage compressor () for compressing a refrigerant, a second compressor () for compressing the refrigerant, a heat rejecting heat exchanger () for cooling the refrigerant, a first economizer circuit (A), and a second economizer circuit (B). The first economizer circuit (A) is configured to inject refrigerant into an interstage port () of the two-stage compressor (). The second economizer circuit (B) is connected to the second compressor ().

Refrigerating system with parallel staged economizer circuits using multistage compression

A refrigeration system (A) comprises an evaporator () for evaporating a refrigerant, a two-stage compressor () for compressing the refrigerant, a single-stage compressor () for compressing the refrigerant, a heat rejecting heat exchanger () for cooling the refrigerant, a first economizer circuit (A), and a second economizer circuit (B). The first economizer circuit (A) is configured to inject refrigerant into an interstage port () of the two-stage compressor (). The second economizer circuit (B) is configured to inject refrigerant into a suction port () of the single-stage compressor (). The single-stage compressor () is configured to discharge into the interstage port () of the two-stage compressor ().

Refrigerating system with parallel staged economizer circuits discharging to interstage pressures of a main compressor

A refrigeration system includes a compressor. A heat rejection heat exchanger is downstream of the compressor along a refrigerant primary flowpath. An expansion device is downstream of the heat rejection heat exchanger along the primary flowpath. A heat absorption heat exchanger is downstream of the expansion device along the primary flowpath. An economizer heat exchanger is between the heat rejection heat exchanger and the expansion device along the primary flowpath. The economizer heat exchanger includes a first portion configured to provide heat transfer from the primary flowpath to a first economizer flowpath. The economizer heat exchanger includes a second portion configured to provide heat transfer from the primary flowpath to a second economizer flowpath.

Economizer heat exchanger

A method for controlling temperature pulldown of an enclosure with a refrigeration system having a compressor, a heat rejecting heat exchanger, an expansion valve, and an evaporator comprises circulating a refrigerant through the refrigeration system, sensing a parameter of the enclosure, determining a desired evaporator pressure based upon the parameter sensed, and adjusting the expansion valve as a function of the desired evaporator pressure.

System and method for controlled expansion valve adjustment

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Skaneateles, NY, United States of America

James William Bush