Lifson, NY
Alexander Lifson, Manilus, NY US
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20100011804 | HEAT EXCHANGER DESIGN FOR IMPROVED PERFORMANCE AND MANUFACTURABILITY - A parallel flow heat exchanger is disclosed having heat transfer tubes with a plurality of relatively small channels, which are aligned in a parallel manner, and wherein the heat transfer tubes are in fluid communication with at least one manifold structure, are received in manifold wall openings and are attached to the manifold structure by brazing process The manifold walls and/or the tubes are modified to minimize the likelihood of brazing material plugging or at least partially blocking any of the plurality of channels In one feature, the openings in the manifold structure are formed by deforming the material of the manifold structure outwardly In another feature, the edges of the heat transfer tubes may be formed such that the outermost end channels within each heat transfer tube extend farther inwardly than do the central channels Various design configurations are disclosed | 01-21-2010 |
20100043469 | REFRIGERATION SYSTEMS WITH VOLTAGE MODULATED COMPRESSOR MOTORS AND METHODS OF THEIR CONTROL - A refrigerant system is provided that includes a compressor, a motor for driving the compressor, a refrigerant system component, and a controller. The refrigerant system component can operate in a pulse width modulated mode having a loaded phase and an unloaded phase. The compressor motor is loaded in the loaded phase but unloaded in the unloaded phase. The controller applies a first voltage to the compressor motor in the loaded phase and a second voltage to the compressor motor in the unloaded phase. Here, the second voltage is less than the first voltage. | 02-25-2010 |
Alexander Lifson, Malius, NY US
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20110000255 | MICROCHANNEL HEAT EXCHANGER WITH ENHANCED REFRIGERANT DISTRIBUTION - An evaporator includes a manifold receiving a distributor insert. The distributor insert receives the flow of refrigerant to be delivered into the manifold, and has openings to communicate this refrigerant into a plurality of chambers which are defined between adjacent dividing elements of the distributor insert within the manifold. In this manner, these chambers are each associated with distinct heat transfer tubes and such that these chambers are isolated from each other. | 01-06-2011 |
Alexander Lifson, Manulius, NY US
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20080209930 | Heat Pump with Pulse Width Modulation Control - A heat pump is provided with a component that has a pulse width modulation control to adjust system capacity. Thus, by utilizing a pulse width modulation technique to control this component, the present invention is able to closely tailor the delivered capacity of the heat pump to that which is demanded, without cycling the unit. In one embodiment, the component has a suction pulse width modulation valve. In another embodiment, the component which is modulated is the compressor pump unit, and, in particular, a pair of scroll members that are allowed to move into and out of contact with each other. The pulse width modulation control device can also be utilized in combination with a heat pump having an economizer function and/or an un-loader function. | 09-04-2008 |
Alexandrer Lifson, Manlius, NY US
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20100132402 | Apparatus and System for Refrigerant Compressor with Liquid-Suction Heat Exchanger - There is provided a refrigeration apparatus ( | 06-03-2010 |
Charles Lifson, Rome, NY US
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20110207362 | APPARATUS FOR PROVIDING A SECURE CONNECTION BETWEEN DIFFERENT DEVICES - An apparatus for holding at least two devices together is provided with a first securing member, a second securing member, and a connecting member extending between the first and second securing members. The first securing member may be an elongate member having first and second ends such that the elongate member has a length between said first and second ends sufficient to wrap around one of the at least two devices, and the first end of the first securing member having securing means that operates to connect the first end to the second end. The second securing member may receive at least one other of the at least two devices, and may have at least two substantially linearly aligned receptacles. Each receptacle may receive the at least one other of the at least two devices. The two devices may be one or more cords, extension cords, and electrical plugs. | 08-25-2011 |
Mark A. Lifson, Fairport, NY US
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20090288432 | TANDEM COMPRESSORS WITH PULSE WIDTH MODULATION SUCTION VALVE - A refrigerant system is provided with tandem compressors. A tandem compressor arrangement includes at least two compressors operating in parallel and having at least one common manifold. A control may operate the compressors either simultaneously, or in some predetermined sequence to provide control over refrigerant system capacity. At least one of the tandem compressors is provided with a pulse width modulation control on a suction line. In this manner, the amount of refrigerant, compressed by the compressor, can be precisely controlled to exactly meet thermal load demands in the conditioned space. | 11-26-2009 |
20090308086 | REFRIGERANT SYSTEM WITH MULTI-SPEED PULSE WIDTH MODULATED COMPRESSOR - A refrigerant system is provided with a compressor having a motor that is operable at least at two distinct speeds. The pulse width modulation control is provided to cycle a compressor motor operation between its at least two speeds at a specific rate to exactly match thermal load demands in a conditioned space. The present invention reduces cycling and other efficiency losses as have been experienced in the prior art, as well as minimizes cost and may improve reliability. Also, the present invention can be utilized in conjunction with other known unloading techniques. | 12-17-2009 |
20100011792 | REFRIGERANT SYSTEM WITH PULSE WIDTH MODULATION CONTROL IN COMBINATION WITH EXPANSION DEVICE CONTROL - A refrigerant system is provided with pulse width modulation control to adjust the amount of refrigerant compressed by a compressor. In one embodiment, a pulse width modulation control controls a suction modulation valve cycled between open and closed positions. In a second embodiment, the compressor itself is cycled between a position at which it compresses refrigerant and a position at which the compression elements are disengaged. In either embodiment, the control also cycles the expansion device in concert with cycling the pulse width modulation valve or the compressor. In this manner, pressure fluctuations in the refrigerant system do not exceed desirable levels. Typical cycle time for pulse width modulation control is between 5 and 30 seconds, and typical offset (delay) time for an expansion device may be between 0 and 3 seconds. | 01-21-2010 |
Mark A. Lifson, Rochester, NY US
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20150037815 | METHOD FOR THE TOPOGRAPHICALLY-SELECTIVE PASSIVATION OF MICRO- AND NANOSCALE DEVICES - Disclosed is a method of preparing a biosensor that involves providing a substrate including a surface having a topographical pattern formed at one or more sites on or in the surface, coating the substrate with a solution including hydrogel particles, wherein the hydrogel particles self-assemble on the surface to mask the surface except at the one or more sites, and binding one or more capture molecules to the one or more sites to form the biosensor. Systems that include the biosensor, as well as methods of using the biosensor, are also disclosed. | 02-05-2015 |