首先介绍了作者开发的可用于80K及以下温区的高频脉冲管制冷机。
In the paper, the high frequency pulse tube coolers (PTCs) developed for 80 K and below temperature application are introduced.
系统设计用两级脉冲管制冷机预冷小型节流制冷机以获得液氦温区环境。
J - t loop is precooled by two - stage pulse tube cryocooler in order to obtain liquid helium temperature.
介绍了该厂房生产区、生活服务区及机械室的空调通风与制冷系统的设计及特点。
Presents the air conditioning and ventilating system design and its characteristics for the producing area, living quarter and mechanical room of the workshop.
本实用新型涉及一种多温区冰箱制冷系统的改进，属于家用电器技术领域。
The utility model relates to an improvement for the refrigeration system of the multiple temperature zone refrigerator, belonging to the technical field of the domestic appliance.
提出了采用合适的混合工质代替纯质氦以提高脉管制冷机在80K温区制冷量的新构思。
The authors give a novel conception that in order to increase the cooling capacity of a pulse tube refrigerator at 80K temperature range, refrigerant mixtures are introduced instead of pure helium.
把办公室布置在两个廊道中间，为供热制冷提供缓冲区，而它的玻璃幕墙能让办公空间自然采光。
Placing the office space inbetween two corridors create a buffer zone for heating and cooling, and the glass facade of office space enable natural light to penetrate inside.
单级高频脉冲管制冷机直接降低到20K以下温区存在很大困难，采用多级方案是高频脉冲管制冷机获得更低温度的主要方法。
Use single stage version to reach the temperature of 20 K is a difficulty for high frequency pulse tube cooler (PTC). Multi-stage version is a popular method to reach the low temperature.
单级高频脉冲管制冷机直接降低到20K以下温区存在很大困难，采用多级方案是高频脉冲管制冷机获得更低温度的主要方法。
Use single stage version to reach the temperature of 20 K is a difficulty for high frequency pulse tube cooler (PTC). Multi-stage version is a popular method to reach the low temperature.
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