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MRI system with dual compressors

A compressor and refrigeration system technology, applied in the field of medical systems, can solve problems such as MRI system shutdown, and achieve the effect of avoiding cooling loss and improving reliability

Inactive Publication Date: 2018-08-21
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with small reservoirs, evaporation of relatively small amounts of liquid helium may force the MRI system to shut down

Method used

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  • MRI system with dual compressors
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Embodiment Construction

[0012] In the following description, for purposes of explanation and not limitation, specific details are set forth such as specific architectures, interfaces, techniques, etc., in order to provide a thorough understanding of the concepts of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In like manner, the text of this specification is directed to example embodiments as shown in the drawings, and is not intended to limit the claimed invention beyond the limits expressly included in the claims. For purposes of simplicity and clarity, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0013] figure 1 An exemplary MRI system 100 including dual compressors is illustrated. Compressor I 110 may be a conventional water-cooled compressor; ...

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Abstract

An MRI system is provided with a refrigeration system that includes dual compressors that are coupled to a single coldhead that cools the liquid helium in the MRI system. Because the single coldhead receives the compressed refrigerant regardless of the compressor that is being used, the unacceptable cooling loss that would have occurred with redundant coldheads is avoided. By coupling two compressors to a single coldhead, continuous operation can be provided despite a failure of either compressor. The dual refrigeration system may comprise a water-cooled compressor and an air-cooled compressorto enhance MRI system reliability in the event of a failure of the primary compressor or the cooling water circulation system. Alternatively, two water-cooled compressors may be provided, each with its own independent water system. Check valves may be used to enable passive control of the refrigerant gas flow from either compressor to the coldhead, thereby further improving the reliability.

Description

technical field [0001] The present invention relates to the field of medical systems, and in particular to MRI systems with redundant cooling compressors for reliable operation. Background technique [0002] MRI systems use liquid helium to cool superconducting magnetic coils. Heat is removed from the liquid helium by using a refrigeration system that includes a coldhead-compressor combination. Typically, the cold head extends into a cryostat that cools the magnet with liquid helium. The refrigeration system also uses helium as the refrigerant, which is separate from the liquid helium of the magnets. The refrigerant gas is compressed by the compressor, and the cold head acts as an expansion engine for heat removal. Conventionally, refrigeration systems include a water circulation system coupled to a compressor to dissipate the heat generated by the compression of helium. [0003] Refrigeration systems typically run continuously (“24 / 7”) to prevent vaporization of the liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/00F25B9/14H01F6/04
CPCF25B9/002F25B9/145F25B2400/075G01R33/3804H01F6/04
Inventor G·G·皮尔莱德雷尔M·福斯J·R·罗杰斯
Owner KONINKLJIJKE PHILIPS NV
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