Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Having oscillating or reciprocating valve
Patent
1992-12-11
1993-12-28
Wayner, William E.
Automatic temperature and humidity regulation
Mixing fluid of dissimilar temperature
Having oscillating or reciprocating valve
236101D, 13762531, G05D 2313
Patent
active
052732088
ABSTRACT:
The valve includes a cylindrical wall, adjacent and distinct hot and cold fluid inlet ports passing through a first wall portion, each port having a plurality of slotted inlet orifices at the inner surface of the wall. A rigid, coiled metal ribbon member is fixedly supported at one end by the base, and has a free end adjacent the body wall. A gate member is affixed to the free end of the ribbon member and is supported against the first wall portion for circumferential movement along the first wall portion in response to expansion and contraction of the ribbon member The gate member includes a plurality of slotted orifices arranged as a hot set alignable with the hot inlet orifices and a cold set alignable with the cold inlet orifices. Once set for a desired temperature, the gate orifices passively move with the expansion or contraction of the ribbon member to maintain the temperature corresponding to the initial setting. The gate orifices move either clockwise or counter clockwise in the same direction as the temperature of the mixture deviates from the set point. However, the effect of the gate orifice movement is opposite with respect to the hot and cold inlet water. When the ribbon member expands (contracts), the hot set of orifices decreases (increases) hot inlet flow, while the cold set of orifices increases (decreases) cold inlet flow. Thus, the desired adjustment toward the set point is accomplished by the dual action of both sets of orifices.
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