Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Fluid from only one supply is controlled
Patent
1998-01-13
1999-11-23
Tapolcai, William E.
Automatic temperature and humidity regulation
Mixing fluid of dissimilar temperature
Fluid from only one supply is controlled
236 122, 236 93A, G05D 2313
Patent
active
059885149
ABSTRACT:
A fluid temperature control apparatus includes a housing with first and second housing portions, and a partition for isolating the first and second housing portions. The first housing portion has a first fluid inlet connected to a hot fluid source, and a first fluid outlet. The second housing portion has a second fluid inlet connected to a cold fluid source, and a second fluid outlet connected to the first fluid inlet. A valve assembly includes a tubular valve seat disposed in the second housing portion to define a piston receiving space with an open end that is spaced from the partition and that is communicated with the second fluid outlet. A piston has a head portion extending slidably into the piston receiving space, and a restricted actuated portion extending out of the open end of the valve seat. The valve seat has a radial valve opening communicated with the second fluid inlet. The piston is movable between a first position, where the head portion blocks the valve opening, and a second position, where the head portion ceases to block the valve opening. A temperature responsive member is mounted on the partition, and has a fluid contacting portion disposed in the first housing portion, and a volume-variable piston actuating portion connected to the actuated portion of the piston and disposed in the second housing portion.
REFERENCES:
patent: 2326096 (1943-08-01), Dillman
patent: 2599699 (1952-06-01), Dilworth et al.
patent: 4190198 (1980-02-01), Casuga et al.
patent: 5127237 (1992-07-01), Sendo et al.
patent: 5271559 (1993-12-01), Naujock
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