常规的对流热交换器,通常设计为涡流流束工作方式。这样的混合流体,允许热从交换器壁传到流体本身。假若,热交换器的尺寸已很小,充足的热量如果仅由热导传递这在层流工作状况才有可能。本文讨论工作在这一状态的微型J-T低温制冷器的设计参数。层流状态工作,提供了设计简单和低噪声的优点。对于低温传感的冷却,这是难能可贵的。 Conventional convection heat exchangers, usually designed for eddy current flow mode of operation. Such a mixed fluid allows heat to pass from the exchanger wall to the fluid itself. If the size of the heat exchanger is already small, sufficient heat is only possible in the laminar flow if it is transmitted only by the heat conduction. This article discusses the design parameters for a miniature J-T cryogenic refrigerator operating in this state. Laminar flow state work provides the advantages of simple design and low noise. This is commendable for the cooling of cryogenic sensors.