Residual coolant sensor for air conditioning system
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United States of America Patent
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Oct 5, 1993
Grant Date -
N/A
app pub date -
Feb 5, 1992
filing date -
Feb 5, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An air conditioning system capable of detecting the amount of residual coolant flowing through circulation piping (1) correctly free of adverse effects of coolant flows. To this end, the air conditioning system is provided with a residual coolant sensor which is constituted by a metal housing (19), an electrode rod (24) provided within the housing (19), and a self-heated thermistor (21) mounted on a fore end portion of the housing (19) and having the opposite ends thereof connected to the electrode rod (24) and housing (19), respectively. The self-heated thermistor 21 is arranged to detect the temperature of the coolant through the housing (19) without directly contacting the coolant to prevent overcooling, and therefore can detect the amount of residual coolant correctly.
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