Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Mixing valve with temperature motive means
Patent
1989-12-11
1990-07-17
Wayner, William E.
Automatic temperature and humidity regulation
Mixing fluid of dissimilar temperature
Mixing valve with temperature motive means
4192, G05D 2312
Patent
active
049416081
ABSTRACT:
A hot water supplying system is adapted to be connected to hot and cold water sources to mix the hot and cold water for discharging the mixed water. The system comprises a mixing chamber having a mixing valve movable therein to vary the mixing ratio of the hot water to the cold water, and a controller at which an intended water temperature is selected in accordance with a temperature scale provided thereat. The controller is operatively connected to the mixing valve so as to move the same into a proper position of discharging the water at the selected temperature. The mixing valve is given a temperature-responsive characteristic to be capable of self-adjusting its position independently of the controller in such a way as to adjust the water temperature in an open loop control manner at the start of discharging the water. An initial compensation mode is provided in the system to monitor the water temperature and determine a deviation between the monitored temperature and the selected temperature. When the deviation exceeds an acceptable level, the controller responds to reassign the temperature scale with the mixing valve position in order to reduce the deviation to the acceptable level and therefore to provide a consistent relation between the water temperature and the selected temperature, whereby compensating for variations in temperature and pressures of the hot and cold water sources available at differing installation sites.
REFERENCES:
patent: 4547977 (1985-10-01), Tenedini
patent: 4682626 (1987-07-01), Bergmann
patent: 4682628 (1987-07-01), Hill
patent: 4682728 (1987-07-01), Oudenhoven
patent: 4741363 (1988-05-01), Hu
patent: 4875623 (1989-10-01), Garris
Higuchi Motohiro
Shimizu Tomoyuki
Suzuki Masashi
Taniguchi Yoshikazu
Matsushita Electric & Works Ltd.
Wayner William E.
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