Abstract:
A heat exchanger (10) is provided including at least one aluminum alloy tube (12) and a plurality of aluminum fins (26) arrayed on the aluminum alloy tube. The aluminum tube may be supported by tube sheets (24) made of aluminum alloy.
Abstract:
A system (20) has a first compressor (22) and a second compressor (52). A heat rejection heat exchanger (30) is coupled to the first and second compressors to receive refrigerant compressed by the compressors. The system includes an economizer for receiving refrigerant from the heat rejection heat exchanger and reducing an enthalpy of a first portion of the received refrigerant while increasing an enthalpy of a second portion. The second portion is returned to the compressor. The ejector (66) has a primary inlet (70) coupled to the means to receive a first flow of the reduced enthalpy refrigerant. The ejector has a secondary inlet (72) and an outlet (74). The outlet is coupled to the first compressor to return refrigerant to the first compressor. A first heat absorption heat exchanger (80) is coupled to the economizer to receive a second flow of the reduced enthalpy refrigerant and is upstream of the secondary inlet of the ejector. A second heat absorption heat exchanger (90) is between the outlet of the ejector and the first compressor.
Abstract:
The invention relates to a refrigeration circuit with at least two compressors, each compressor comprising at least one lubrication point and at least one oil pump having an outlet for providing oil to said lubrication point; wherein the outlet of the oil pump of at least one of the compressors is fluidly connected to the lubrication point of at least one different compressor.
Abstract:
A control device (4) having a graphical user interface (10) for controlling the operation of a transport refrigeration unit (3) is disclosed. The graphical user interface (10) may include a menu structure having multiple levels of menu options, executable functions and data items that may be navigated and viewed by a user. Access to the various menus may be user-specific and controlled so that a subset of the information in the menu structure is available to normal users, and larger subsets of the information are available to advanced users having higher levels of authorization to the menus and information contained in the graphical user interface device (10). The graphical user interface (10) may also include programmable soft keys (30) that may take users directly to frequently viewed menu options, functions and data items without the necessity of navigating through the levels of the menu structure.
Abstract:
A pulsation - canceling conduit assembly (100, 100 ' ) has a first conduit leg (130) A second conduit leg (150, 28-1 ' ) extends from a junction with the first conduit leg. A first branch (180) extends from the junction opposite the first conduit. A first member is axially displaceable along the first branch to define an effective volume of the first branch.
Abstract:
A method for determining proper wiring of multiple three-phase motors (306, 308,310) in a refrigeration system (300) is disclosed. The method may include energizing a plurality of three-phase motors (306, 308, 310) with a first input phase rotation and recording performance data, energizing the plurality of three-phase motors with a second input phase rotation and recording the performance data (402, 404, 406), evaluating the performance data and determining if each of three-phase motors is properly wired (408), operating the refrigeration system (300) in a normal mode if all of the three-phase motors are properly wired (410), or operating the refrigeration system (300) in a less efficient mode if at least one three-phase motor is improperly wired (412, 414, 416).
Abstract:
A system (170) has a compressor (22). A heat rejection heat exchanger (30) is coupled to the compressor to receive refrigerant compressed by the compressor. A non - controlled ejector (38) has a primary inlet coupled to the heat rejection exchanger to receive refrigerant, a secondary inlet, and an outlet. The system includes means (172, e.g., a nozzle) for causing a supercritical - to - subcritical transition upstream of the ejector.
Abstract:
Embodiments of controlled atmosphere systems, apparatus, and methods for the same can include systems and/or methods that can include provisions for adaptive control of compressor discharge pressure. In one embodiment, variable membrane temperature can regulate compressor discharge pressure.
Abstract:
A refrigerant vapor compression system (10) includes a plurality of components, including a flash tank (70), connected in a refrigerant flow circuit by a plurality of refrigerant lines (2, 4, 6, 8). The system internal volume equals to the sum of the internal volumes of the plurality of components and the internal volume of the plurality of refrigerant lines. The internal volume of the flash tank ranges from at least 10% to about 30% of the total system internal volume.
Abstract:
A refrigerated case (20) has a body (22). The body has a refrigerated compartment (24) and an air flowpath (100). The body includes a lower wall (156) below the air flowpath. A drain pipe (150) protrudes from the lower wall and has a lower outlet (166). A refrigerant air heat exchanger (72) is along a refrigerant flowpath and within the air flowpath. The body further includes a water trap vessel (152) having an upper end (176) secured to the base, a lower portion (174) surrounding the drain outlet, at least one vessel outlet (170) above the drain outlet, and a segmented rim flange. The body includes a plurality of features (240) engaging an underside of the flange along respective segments to vertically and laterally retain the water trap vessel and permit removal of the vessel via a rotation of the vessel.