公开(公告)号：EP1012521A4

公开(公告)日：2002-05-15

申请号：EP98934171

申请日：1998-07-16

申请人： CRYOGEN INC ,  SECRETARY OF COMMERCE OF THE U

发明人： DOBAK JOHN D III ,  RADEBAUGH RAY ,  MARQUARDT ERIC D

IPC分类号： F28F7/00 ,  A61B18/02 ,  C09K5/04 ,  F25B9/00 ,  F25B9/02 ,  F28D7/02 ,  F28D7/12 ,  F28F13/06 ,  F28F21/08 ,  F28D9/00 ,  F28D17/00 ,  F28F3/08 ,  A61B17/36

CPC分类号： C09K5/045 ,  A61B18/02 ,  A61B2018/0212 ,  A61B2018/0275 ,  A61B2018/0281 ,  C09K2205/12 ,  C09K2205/122 ,  C09K2205/13 ,  C09K2205/132 ,  F25B9/006 ,  F25B9/02 ,  F25B2309/003 ,  F25B2309/021 ,  F25B2309/022 ,  F25B2309/023 ,  F25B2400/12 ,  F28D7/12 ,  F28F13/06 ,  F28F21/082 ,  F28F21/085 ,  F28F2260/02

摘要： A microminiature laminated heat exchanger for use in a cryogenic probe, and a method of manufacture. The heat exchanger has high and low pressure flow patterns (46, 48) etched into oxygen free copper sheets (42), with the flow patterns being tortuous paths promoting turbulent flow. The sheets (42) containing the flow patterns are bonded into a laminated assembly in the shape of a cylinder (28), with a high pressure inlet and a low pressure outlet in a first end, and a high pressure outlet and a low pressure inlet in a second end. The high pressure flow path lies alongside the low pressure flow path, with flow in the two paths being in opposite directions, to accomplish counterflow heat exchange. Substantial portions of the flow paths are either parallel to, or transverse to, the longitudinal axis of the heat exchanger, with the resuulting heat flow being essentially radial or axial, respectively.

公开(公告)号：EP0855010A4

公开(公告)日：1999-11-17

申请号：EP96936309

申请日：1996-10-09

申请人： CRYOGEN INC ,  US COMMERCE

发明人： DOBAK JOHN D III ,  RADEBAUGH RAY ,  HUBER MARCIA L ,  MARQUARDT ERIC D

IPC分类号： A61B18/02 ,  C09K5/04 ,  F25B9/00 ,  F25B9/02 ,  F28D7/12 ,  F28F13/06 ,  F28F21/08 ,  F25B19/02 ,  A61B17/36 ,  F25D3/00

CPC分类号： F28F13/06 ,  A61B18/02 ,  A61B2018/0212 ,  A61B2018/0275 ,  A61B2018/0281 ,  C09K5/045 ,  C09K2205/12 ,  C09K2205/122 ,  C09K2205/13 ,  C09K2205/132 ,  F25B9/006 ,  F25B9/02 ,  F25B2309/003 ,  F25B2309/021 ,  F25B2309/022 ,  F25B2309/023 ,  F25B2400/12 ,  F28D7/12 ,  F28F21/08 ,  F28F2260/00

摘要： A miniature mixed gas refrigeration system is disclosed, having a coaxial catheter (18) with an inner high pressure supply lumen (24) and an outer low pressure return lumen (22). The gas mixture is pressurized by a compressor (12) to a pressure less than 420 psia, for safety reasons. The distal portion (23) of the outer lumen contains a micro-miniature heat exchanger (28) constructed of laminated plates or sheets (42). The plates or sheets (42) establish high pressure (36) and low pressure passageways (40), with high surface area, having a tortuous path for the gas flow to maximize heat exchange. The high pressure outlet (50) of the heat exchanger (28) is connected to a Joule-Thomson expansion element (30) where the high pressure gas is expanded isenthalpically to a lower temperature at least as low as 180K. This low temperature gas cools a heat transfer element (32) mounted in the outer wall of the catheter, to cool an external object. Return gas flows back through the heat exchanger to pre-cool the incoming high pressure gas mixture.