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    • 2. 发明申请
    • REGULATED JOULE THOMPSON COOLING SYSTEM WITH AN ACTIVE CLOSED CONTROL LOOP FOR INCREASING RELIABILITY AND PREVENTING INSTANTANEOUS OVERHEATING
    • 具有主动关闭控制环的调节型THOMPSON冷却系统,以提高可靠性和防止瞬时过热
    • WO2012049673A3
    • 2012-07-12
    • PCT/IL2011000786
    • 2011-10-06
    • RAFAEL ADVANCED DEFENSE SYSTIBI DOVSIMCHON MORDECHAIMEIR TAMIR
    • TIBI DOVSIMCHON MORDECHAIMEIR TAMIR
    • F25B19/02
    • F25B9/02F25D19/006
    • A cryogenic Joule Thompson system for cooling an IR sensor, which includes: a valve at an orifice location to discharge refrigerant gas through; a bellows containing gas, said bellows is thermally coupled to a sensor to cause expansion or contraction of the bellows depending on the sensor temperature; and a displacement rod, one end of which is rigidly connected to the bellows and the other end of which is connected to said valve; wherein the system further includes: a resistor which is thermally coupled to said bellows; a temperature measuring element for measuring the temperature of said IR sensor, and providing the temperature measurements to a processor; a processor for receiving said temperature measurements, for detecting a state of sensor temperature increase after a period of said orifice closure or low refrigerant discharge rate below a predefined value, and for activating a current flow through said resistor.
    • 用于冷却红外传感器的低温焦耳汤普森系统,其包括:在孔口处的阀门,用于排出制冷剂气体; 包含气体的波纹管,所述波纹管热耦合到传感器以根据传感器温度引起波纹管的膨胀或收缩; 以及位移杆,其一端刚性地连接到波纹管,另一端连接到所述阀; 其中所述系统还包括:电阻器,其热耦合到所述波纹管; 用于测量所述IR传感器的温度并将温度测量值提供给处理器的温度测量元件; 用于接收所述温度测量的处理器,用于检测在所述孔关闭的时段或低制冷剂排出速率低于预定值之后的传感器温度升高的状态,以及用于激活通过所述电阻器的电流。