HVAC low power usage circulation blower
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 30, 1993
Grant Date -
N/A
app pub date -
Jan 18, 1991
filing date -
Jan 18, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A field installable device for a conventional heating and air conditioning system (HVAC) is provided which operates a blower fan in conjunction with a standard thermostat. Presently, HVAC systems operate in four modes: heating, cooling, off and fan 'on'. The device includes a multi-pole, multi-speed motor and a control operatively connected between the thermostat and the motor. With the fan switch in the 'on' position and heating or cooling called for, the control causes the blower to operate at a high speed, which may be different for heating or cooling. When the pre-selected temperature is reached the particular thermal operation (i.e., heating or cooling) is stopped. The control switches the motor to a speed substantially slower than the operating condition speed to provide continuing air circulation until the thermostat again calls for thermal operation. With the switch in 'auto' position, the blower operates similarly to present systems.
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Family
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