公开(公告)号：US11072023B2

公开(公告)日：2021-07-27

申请号：US15423961

申请日：2017-02-03

Applicant: Raytheon Company

Inventor： Theodore J. Conrad ,  James R. Chow ,  Craig A. Armiento ,  William E. Elias

IPC: F25B9/14 ,  B22F9/24 ,  B01J19/12 ,  F28F13/18 ,  F28F21/02 ,  B22F1/00 ,  C09D11/037 ,  C09D11/322 ,  C09D11/52 ,  F25B9/00 ,  F28F19/02 ,  B41J2/01 ,  B33Y10/00 ,  B33Y80/00 ,  F28D21/00

Abstract: An apparatus includes a heat exchanger configured to transfer heat to a fluid and to absorb heat from the fluid as the fluid flows between a warm end and a cold end of a cryocooler. The heat exchanger includes at least one section having a substrate of at least one allotropic form of carbon and a layer of nanoparticles on or over the substrate. The heat exchanger could include multiple sections, and each section could include one of multiple substrates and one of multiple layers of nanoparticles. The heat exchanger can further include pores through the multiple sections of the heat exchanger, where the pores are configured to allow the fluid to flow through the heat exchanger and to contact the substrates and the layers of nanoparticles. The nanoparticles could include at least one lanthanide element or alloy, and the substrate could include carbon nanotubes or graphene.

公开(公告)号：US20190048863A1

公开(公告)日：2019-02-14

申请号：US15676808

申请日：2017-08-14

Applicant: Raytheon Company

Inventor： Andrew L. Bullard ,  Theodore J. Conrad

IPC: F04B35/04 ,  F04B39/00 ,  F25B9/14 ,  F25B31/02 ,  F25B9/06

CPC classification number: F04B35/04 ,  F04B3/00 ,  F04B17/03 ,  F04B35/045 ,  F04B39/0005 ,  F25B9/06 ,  F25B9/14 ,  F25B31/023

Abstract: A method includes generating a first varying electromagnetic field using a first voice coil of a first actuator. The method also includes repeatedly attracting and repelling a first magnet of the first actuator based on the first varying electromagnetic field. The first voice coil is connected to a first piston of a compressor, and the first magnet is connected to an opposing second piston of the compressor. Attracting the first magnet narrows a space between the pistons, and repelling the first magnet enlarges the space between the pistons. The method may further include generating a second varying electromagnetic field using a second voice coil of a second actuator and repeatedly attracting and repelling a second magnet of the second actuator based on the second varying electromagnetic field. The second voice coil may be connected to the second piston, and the second magnet may be connected to the first piston.

公开(公告)号：US10060655B2

公开(公告)日：2018-08-28

申请号：US14456821

申请日：2014-08-11

Applicant: Raytheon Company

Inventor： Dawson R. Bruckman ,  Michael H. Kieffer ,  Theodore J. Conrad ,  Lowell A. Bellis ,  Marwan Aryan

IPC: F25B9/00 ,  F04B37/08 ,  B01D8/00 ,  G05D23/00 ,  F25B9/10 ,  F25B49/02 ,  F25B9/14 ,  G05D23/19 ,  G05D23/20

CPC classification number: F25B9/14 ,  F25B9/10 ,  F25B49/022 ,  F25B2309/1428 ,  G05D23/1902 ,  G05D23/20

Abstract: A system includes a multi-stage cryocooler having multiple stages and a temperature control system configured to regulate temperatures of the multiple stages of the multi-stage cryocooler. The temperature control system includes an input interface configured to receive (i) temperature setpoints for the stages of the multi-stage cryocooler and (ii) temperature information corresponding to temperatures measured at the stages of the multi-stage cryocooler. The temperature control system also includes processing circuitry configured to determine temperature errors and calculate at least one of a compressor stroke error and a pressure-volume phase error. The temperature control system further includes at least one controller configured to adjust at least one of a compressor setting and a pressure-volume phase of the multi-stage cryocooler.

公开(公告)号：US20180180329A9

公开(公告)日：2018-06-28

申请号：US15423961

申请日：2017-02-03

Applicant: Raytheon Company

Inventor： Theodore J. Conrad ,  James R. Chow ,  Craig A. Armiento ,  William E. Elias

IPC: F25B9/14 ,  B41J2/01 ,  B22F9/24 ,  B22F1/00 ,  B33Y10/00 ,  B33Y80/00 ,  F28F13/18 ,  F28F21/02

CPC classification number: F25B9/145 ,  B01J19/123 ,  B22F1/0018 ,  B22F9/24 ,  B22F2202/11 ,  B22F2999/00 ,  B33Y10/00 ,  B33Y80/00 ,  B41J2/01 ,  C09D11/037 ,  C09D11/322 ,  C09D11/52 ,  F25B9/00 ,  F25B2309/1412 ,  F25B2309/1415 ,  F28D2021/0033 ,  F28F13/18 ,  F28F13/185 ,  F28F19/02 ,  F28F21/02 ,  F28F2245/00 ,  F28F2255/20

Abstract: An apparatus includes a heat exchanger configured to transfer heat to a fluid and to absorb heat from the fluid as the fluid flows between a warm end and a cold end of a cryocooler. The heat exchanger includes at least one section having a substrate of at least one allotropic form of carbon and a layer of nanoparticles on or over the substrate. The heat exchanger could include multiple sections, and each section could include one of multiple substrates and one of multiple layers of nanoparticles. The heat exchanger can further include pores through the multiple sections of the heat exchanger, where the pores are configured to allow the fluid to flow through the heat exchanger and to contact the substrates and the layers of nanoparticles. The nanoparticles could include at least one lanthanide element or alloy, and the substrate could include carbon nanotubes or graphene.

公开(公告)号：US09488389B2

公开(公告)日：2016-11-08

申请号：US14151408

申请日：2014-01-09

Applicant: Raytheon Company

Inventor： Theodore J. Conrad ,  Michael J. Ellis ,  Lowell A. Bellis ,  James R. Chow ,  Brian R. Schaefer ,  Troy T. Matsuoka

IPC: F25B9/14 ,  F25B9/10

CPC classification number: F25B9/14 ,  F25B9/10 ,  F25B9/145 ,  F25B2309/003 ,  F25B2309/1415

Abstract: An apparatus includes a regenerator configured to transfer heat to a fluid and to absorb heat from the fluid as the fluid flows between a warm end and a cold end of a cryocooler. The regenerator includes an anisotropic thermal layer configured to reduce a flow of heat axially along the regenerator and to spread the absorbed heat radially or laterally in a plane of the anisotropic thermal layer. The anisotropic thermal layer includes at least one allotropic form of carbon. The anisotropic thermal layer could have a higher radial or lateral thermal conductivity and a lower axial thermal conductivity. The anisotropic thermal layer could include carbon nanotubes and/or graphene. The regenerator could include multiple anisotropic thermal layers that divide the regenerator into multiple segments, where the anisotropic thermal layers are configured to reduce heat transfer between adjacent segments of the regenerator.

Abstract translation: 一种装置包括再生器，其被配置为当流体在低温冷却器的暖端和冷端之间流动时，将热量传递给流体并吸收来自流体的热量。 再生器包括各向异性热层，其被配置为沿着再生器轴向减小热量流并且在各向异性热层的平面内径向或横向扩散吸收的热量。 各向异性热层包括至少一种同素异形体的碳。 各向异性热层可具有更高的径向或横向热导率和较低的轴向热导率。 各向异性热层可以包括碳纳米管和/或石墨烯。 再生器可以包括将再生器分成多个段的多个各向异性热层，其中各向异性热层被配置为减少再生器的相邻段之间的热传递。

公开(公告)号：US20160040830A1

公开(公告)日：2016-02-11

申请号：US14565513

申请日：2014-12-10

Applicant: Raytheon Company

Inventor： James R. Chow ,  Theodore J. Conrad ,  David M. La Komski

IPC: F17C7/02 ,  H01B9/00 ,  H01B1/04

CPC classification number: F17C7/02 ,  F25D19/006 ,  F25D2400/40 ,  H01B1/04 ,  H01B9/006 ,  H01F6/065 ,  H01R4/68

Abstract: A cryogenic assembly includes a platform configured to support at least one electronic component. A cryocooler is thermally connected to the platform to cool the platform to a cryogenic temperature. A vacuum unit includes a housing that surrounds a cavity configured to receive the platform. The vacuum unit is configured to thermally insulate the cavity from surrounding ambient air surrounding. At least one connector is configured to deliver an electrical signal from a power supply to the cryogenic assembly. The connector includes at least one carbon nanotube interconnect that inhibits heat flow into cryogenic assembly while delivering the electrical signal.

Abstract translation: 低温组件包括被配置为支撑至少一个电子部件的平台。 将低温冷却器热连接到平台以将平台冷却至低温温度。 真空单元包括围绕构造成接收平台的空腔的壳体。 真空单元构造成将空腔与周围环境空气隔热。 至少一个连接器被配置为将电信号从电源传送到低温组件。 连接器包括至少一个碳纳米管互连，其在传送电信号的同时抑制热量进入低温组件。