Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Including bypass
Patent
1993-11-03
1994-09-27
Tapoical, William E.
Automatic temperature and humidity regulation
Mixing fluid of dissimilar temperature
Including bypass
137 98, 137110, G05D 2313
Patent
active
053501128
ABSTRACT:
A tempered water mixing system for applications such as emergency drench shower and eyewash stations, wherein the mixing system includes back-up control valves to ensure a substantial water flow without risk of user scalding in the event of malfunction of a main thermostatic mixing valve. The main mixing valve thermostatically blends cold and hot water supplies to provide a tempered discharge outflow at a selected temperature. A temperature limit control valve detects the discharge outflow temperature and responds to an excess temperature condition to modulate hot water flow in a manner reducing discharge temperature. A flow limit control valve detects the pressure differential between the discharge outflow and the cold water supply, and responds to a low flow condition represented by a high pressure differential to permit a make-up bypass flow of cold water past the main mixing valve.
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Haw Company
Tapoical William E.
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