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公开(公告)号：US10352272B2
公开(公告)日：2019-07-16
申请号：US15766813
申请日：2016-10-15
申请人： ThermoLift, Inc.
发明人： David Yates , Paul Schwartz , Peter Hofbauer , Adrian Tusinean
摘要： A thermodynamic apparatus, such as a Stirling engine or a Vuilleumier heat pump, has a heat exchanger in which energy is exchanged between a working fluid and an exhaust gas stream. On top of the cylinder of the thermodynamic apparatus is a dome-shaped section. By incorporating the heat exchanger within the dome, the flow paths can be simplified, the number of separate components reduced, and overall weight reduced. Flow passages for the working fluid are embedded in the dome. Channels for the exhaust gases are formed in an outer surface. The passages and the channels are helically arranged, one clockwise and one counter clockwise. The dome can be cast with a core for the casting fabricated via three-dimensional printing. In some embodiments, the dome is made of fiber-reinforced material.
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公开(公告)号：US20180313296A1
公开(公告)日：2018-11-01
申请号：US16029768
申请日：2018-07-09
申请人： ThermoLift, Inc.
发明人： Peter Hofbauer
IPC分类号： F02G1/044
CPC分类号： F02G1/0445 , F02G1/0435 , F02G2250/18 , F02G2280/60 , F25B30/02
摘要： A four-process cycle is disclosed for a Vuilleumier heat pump that has mechatronically-controlled displacers. Vuilleumier heat pumps that use a crank to drive the displacers have been previously developed. However, mechatronic controls provides a greater degree of freedom to control the displacers. The four-process cycle provides a higher coefficient of performance than prior cycles in the crank-driven Vuilleumier heat pump and those previously disclosed for a mechatronically-driven Vuilleumier heat pump. The four-process cycle can be drawn out to provide a low demand condition by causing both displacers to remain stationary for a period of time. The four processes in which one of the displacers is commanded to move are separated by periods of inactivity in which both displacers remain stationary.
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公开(公告)号：US20180259023A1
公开(公告)日：2018-09-13
申请号：US15760303
申请日：2016-09-15
申请人： ThermoLift, Inc.
发明人： Peter Hofbauer , James F. Smith , Seann Convey , David Yates
CPC分类号： F16F1/028 , F01L1/462 , F01L3/10 , F01L9/04 , F01L2009/0434 , F01L2009/0436 , F02G1/053 , F02G2270/42 , F16F1/06 , F16F3/04 , F16F2226/04 , F16F2232/08 , F16F2234/02 , H01F7/1638
摘要： Reciprocating apparatuses such as a displacer in a Stirling engine or Vuilleumier (thermally-driven) heat pump and such as a poppet valve in an internal combustion engine have been known to be built with a mechatronic actuator. The reciprocating element has two springs in compression biased against each other. It has been found that conventional springs in compression introduce losses. A spring is disclosed in which a portion of the coil is wound in a clockwise direction and a portion is wound in a clockwise direction. Also, in reciprocation, the spring is in compression at one end of travel and in tension at the other end of travel.
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公开(公告)号：US11226138B2
公开(公告)日：2022-01-18
申请号：US16190947
申请日：2018-11-14
申请人： ThermoLift, Inc.
发明人： Peter Hofbauer , YueXin Huang , David Yates , Sai Ronit Kaza
摘要： A thermodynamic apparatus that includes a displacer within a cylinder is disclosed. The displacer reciprocates within the cylinder by a linear actuator that includes electrical coils, an armature, and a coil spring system. The spring system includes collinear first and second coil springs of opposite sense. First ends of the springs are captured in a first plate; second ends of the springs are captured in a second plate. Without constraint, the springs can compensate to forces by bending, rotating, increasing in diameter, and combinations thereof. In certain applications, such as the heat pump, bending should be minimized. By selecting the points of capture of the hooks at the ends of the springs in the plates, bending force of the first spring counteracts the bending force of the second spring.
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公开(公告)号：US10598126B2
公开(公告)日：2020-03-24
申请号：US16029768
申请日：2018-07-09
申请人： ThermoLift, Inc.
发明人： Peter Hofbauer
摘要： A four-process cycle is disclosed for a Vuilleumier heat pump that has mechatronically-controlled displacers. Vuilleumier heat pumps that use a crank to drive the displacers have been previously developed. However, mechatronic controls provides a greater degree of freedom to control the displacers. The four-process cycle provides a higher coefficient of performance than prior cycles in the crank-driven Vuilleumier heat pump and those previously disclosed for a mechatronically-driven Vuilleumier heat pump. The four-process cycle can be drawn out to provide a low demand condition by causing both displacers to remain stationary for a period of time. The four processes in which one of the displacers is commanded to move are separated by periods of inactivity in which both displacers remain stationary.
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公开(公告)号：US09982914B2
公开(公告)日：2018-05-29
申请号：US14648813
申请日：2013-12-04
申请人： ThermoLift, Inc.
发明人： Peter Hofbauer
IPC分类号： F22B15/00 , F24H9/20 , F23N5/12 , F24H1/43 , F23M9/10 , F23N1/08 , F28D7/02 , F28D7/04 , F28D21/00 , F28F1/02 , F28F1/16 , F24H1/14
CPC分类号： F24H9/2035 , F23M9/10 , F23N1/082 , F23N5/12 , F24H1/145 , F24H1/43 , F24H2210/00 , F28D7/028 , F28D7/04 , F28D21/0003 , F28D21/0007 , F28F1/022 , F28F1/16
摘要： It is common in heating systems, such as in a hot water heater for there to be a combustor with the exhaust gases from the combustor provided to a heat exchanger to heat up the water. Disclosed herein is an integrated heat exchanger and burner assembly in which the combustion occurs proximate the surface of the heat exchanger. Such a system may include at least one tube that is coiled into a number of turns, that is a tube coil with the at least one tube having an inlet and an outlet and the distance between adjacent turns is less than a predetermined distance, i.e. a the quench distance.
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公开(公告)号：US09677794B2
公开(公告)日：2017-06-13
申请号：US14391787
申请日：2013-04-11
申请人： ThermoLift, Inc.
发明人： Peter Hofbauer
摘要： A Vuilleumier heat pump is disclosed in which hot and cold displacers are controlled by first and second electromagnetic actuators, respectively. The first actuator is capable of moving the hot displacer between the first and second ends of travel while the cold displacer remains stationary and the second actuator is capable of moving the cold displacer while the hot displacer remains stationary. Prior art crank arrangements are unable to provide dwell in one displacer while moving the other displacer. Actuation of the displacers according to embodiments of the present disclosure provides a higher coefficient of performance than crank arrangements.
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公开(公告)号：US20160298878A1
公开(公告)日：2016-10-13
申请号：US15037493
申请日：2014-11-18
申请人： THERMOLIFT, INC.
发明人： Peter Hofbauer
IPC分类号： F25B9/14
CPC分类号： F25B9/14 , F02G1/0435 , F02G2243/02 , F02G2280/10 , F25B30/00
摘要： A four-process cycle is disclosed for a Vuilleumier heat pump that has mechatronically-controlled displacers. Vuilleumier heat pumps that use a crank to drive the displacers have been previously developed. However, mechatronic controls provides a greater degree of freedom to control the displacers. The four-process cycle provides a higher coefficient of performance than prior cycles in the crank-driven Vuilleumier heat pump and those previously disclosed for a mechatronically-driven Vuilleumier heat pump.
摘要翻译： 对于具有机械控制置换器的Vuilleumier热泵公开了四个工艺循环。 以前开发了使用曲柄驱动置换器的Vuilleumier热泵。 然而，机电控制提供了更大程度的控制置换器的自由度。 四工艺循环提供了曲柄驱动的Vuilleumier热泵以前公开的用于机电驱动的Vuilleumier热泵的先前循环的更高的性能系数。
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公开(公告)号：US20220220922A1
公开(公告)日：2022-07-14
申请号：US17595501
申请日：2020-05-22
申请人： ThermoLift, Inc.
摘要： A tubular reactor which acts as a combustor and heat exchanger is disclosed. Such reactor supplants a system with a combustor having a heat exchanger arranged around the combustor. The combined system includes a diffuser having an inlet for a fuel-and-air mixture and a plurality of holes defined in its surface through which the fuel-and-air mixture exits the diffuser and a plurality of tubes. First linear portions along the length of each tube are mutually parallel with a centerline of the first portions of the tubes displaced from the diffuser by a predetermined distance. Centerlines of the linear portions of adjacent tubes are displaced from each other by a predetermined gap. The fuel and air combust in the proximity of the first portion of the tubes for effective heat transfer to gases traveling through the tubes. Such a tubular reactor can be employed within a thermal-compression heat pump.
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公开(公告)号：US10030893B2
公开(公告)日：2018-07-24
申请号：US15037493
申请日：2014-11-18
申请人： ThermoLift, Inc.
发明人： Peter Hofbauer
摘要： A four-process cycle is disclosed for a Vuilleumier heat pump that has mechatronically-controlled displacers. Vuilleumier heat pumps that use a crank to drive the displacers have been previously developed. However, mechatronic controls provides a greater degree of freedom to control the displacers. The four-process cycle provides a higher coefficient of performance than prior cycles in the crank-driven Vuilleumier heat pump and those previously disclosed for a mechatronically-driven Vuilleumier heat pump.
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