Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1996-09-30
1999-03-02
Paschall, Mark H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219494, 219505, 62222, H05B 102
Patent
active
058774769
ABSTRACT:
Apparatus for detecting working fluid state in a heat transfer system of the type having an evaporator and an expansion valve for controlling mass flow of the working fluid to the evaporator, comprises a first sensor disposed in the working fluid on the outlet side of the evaporator; the first sensor producing a first signal related to the working fluid state; a second sensor disposed in the working fluid on the inlet side of the evaporator; the second sensor producing a second signal related to a pressure dependent characteristic of the working fluid; and a control circuit for receiving the first and second signals and determining the working fluid state based on a ratio of the first and second signals.
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Jain Virender
Kenyon Richard L.
Nolan Michael
Yabuki Roy M.
Parker-Hannifin Corp.
Paschall Mark H.
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