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Class Information
Number: 236/DIG.9
Name: Automatic temperature and humidity regulation > Fan control

Patents under this class:
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Patent Number Title Of Patent Date Issued
7448226 Refrigerator Nov. 11, 2008
7432477 Set-back control for both HVAC and water heater via a single programmable thermostat Oct. 7, 2008
7340910 System and method of increasing efficiency of heat pumps Mar. 11, 2008
7191826 Variable speed fan motor control for forced air heating/cooling system Mar. 20, 2007
6996441 Forward-looking fan control using system operation information Feb. 7, 2006
6956344 High availability fan system Oct. 18, 2005
6935130 Computer cooling system Aug. 30, 2005
6695046 Variable speed fan motor control for forced air heating/cooling system Feb. 24, 2004
6684944 Variable speed fan motor control for forced air heating/cooling system Feb. 3, 2004
6584792 Method for driving an output stage by pulse-width modulation Jul. 1, 2003
6504338 Constant CFM control algorithm for an air moving system utilizing a centrifugal blower driven by an induction motor Jan. 7, 2003
6456023 Method and apparatus to control a variable speed motor Sep. 24, 2002
6390379 Method and device for controlling revolving speed of heat-dissipating fan May. 21, 2002
6369544 Furnace and air conditioner blower motor speed control Apr. 9, 2002
6336592 Thermal control for a test and measurement instrument Jan. 8, 2002
6182902 Device and method for automatically controlling rotating speed of fan cooler Feb. 6, 2001
6155341 Continuous fan adjustment method Dec. 5, 2000
6079219 Air conditioner Jun. 27, 2000
6070660 Variable speed fan motor control for forced air heating/cooling system Jun. 6, 2000
5906315 Watchdog timer for controlling a cooling system May. 25, 1999
5875966 Dual mode input signal conditioner Mar. 2, 1999
5813600 Method for operating a heating and/or air conditioning system Sep. 29, 1998
5616995 Systems and methods for controlling a draft inducer for a furnace Apr. 1, 1997
5364026 Ventilation fan control Nov. 15, 1994
5332151 Cooling/heating apparatus having automatic ventilating function and its control method Jul. 26, 1994
5326025 Warm up method for two stage furnace Jul. 5, 1994
5249741 Automatic fan speed control Oct. 5, 1993
5228307 Multitemperature responsive coolant coil fan control and method Jul. 20, 1993
5220255 Interface for interconnecting a thermostat and an electronically commutated motor Jun. 15, 1993
5197667 HVAC low power usage circulation blower Mar. 30, 1993
5102040 Method and apparatus for fan control to achieve enhanced cooling Apr. 7, 1992
5074463 Air conditioning apparatus for automotive vehicle Dec. 24, 1991
5049801 Dual speed controller for attic ventilator Sep. 17, 1991
5027527 Air-cooling system for precision measuring machines Jul. 2, 1991
4978896 Method and apparatus for controlling a blower motor in an air handling system Dec. 18, 1990
4957011 Weathering testing system Sep. 18, 1990
4907737 Electronic control system for a gas-fired/hot air furnace with induced draft blower Mar. 13, 1990
4860231 Calibration technique for variable speed motors Aug. 22, 1989
4818970 Fire condition detection and control system for air moving and filtering units Apr. 4, 1989
4773587 Heating and air conditioning fan sensor control Sep. 27, 1988
4722669 Fan speed controller Feb. 2, 1988
4688547 Method for providing variable output gas-fired furnace with a constant temperature rise and efficiency Aug. 25, 1987
4659290 Fan speed controller Apr. 21, 1987
4648551 Adaptive blower motor controller Mar. 10, 1987
4518032 Temperature control apparatus for automobile air-conditioning systems May. 21, 1985
4408713 Control for automobile air conditioning system Oct. 11, 1983
4407446 Control for automobile air conditioning system Oct. 4, 1983
4406397 Central air conditioning equipment Sep. 27, 1983
4373576 Heating, ventilating and air conditioning system with reversible air flow Feb. 15, 1983
4352349 Control circuit for air conditioning systems Oct. 5, 1982

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