Thermal insulation system of the vacuum type
    64.
    发明授权
    Thermal insulation system of the vacuum type 失效
    真空型隔热系统

    公开(公告)号:US5765379A

    公开(公告)日:1998-06-16

    申请号:US676220

    申请日:1996-07-19

    CPC classification number: F25D23/062 F25D2201/1262 F25D2201/14

    Abstract: It is already known that heat insulating elements, e.g. in refrigerators, may be more efficient if they are sealingly encapsulated and subjected to a high vacuum. Based on theoretical considerations in connection with foam having small cells it has been relevant to use a vacuum of the magnitude of 0.001 mbar and hermetical sealing of the elements. According to the invention it has been found that practically well usable results are achievable at much higher pressures, viz. in a range about 1 mbar, which is much easier to produce. Consequently, a further simplification can be obtained by renouncing the hermetical sealing and relying on an only "almost tight" sealing, combined with the use of an operationally active vacuum pump provided in each apparatus unit. Such a pump can easily have a capacity sufficient to maintain the moderate vacuum in spite of inward leaking of air from outside and a possible internal gas generation; for the specific purpose an insulation foam of the open cell type has been found to be preferable.

    Abstract translation: PCT No.PCT / DK95 / 00028 Sec。 371日期:1996年7月19日 102(e)日期1996年7月19日PCT提交1995年1月19日PCT公布。 WO95 / 20136 PCT出版物 日期1995年7月27日已知绝热元件,例如 如果它们被密封地包封并经受高真空,则可能更有效。 基于与具有小电池的泡沫相关的理论考虑,使用大小为0.001毫巴的真空和元件的密封密封是相关的。 根据本发明,已经发现,在高得多的压力下可以实现实际上可用的结果, 在约1毫巴的范围内,这更容易生产。 因此,通过放弃气密密封并依赖于仅使用几乎紧密的密封,并结合使用设置在每个装置单元中的可操作有效的真空泵,可以进一步简化。 这样的泵可以容易地具有足以维持中等真空度的能力,尽管空气从外部向内泄漏和可能的内部气体产生; 为了特定目的,已经发现开孔型绝缘泡沫是优选的。

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