Control system for cooking appliance employing convection...

Details Control system for cooking appliance employing convection... Control system for cooking appliance employing convection...

2006-09-19

2006-09-19

Paschall, Mark (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

C219S414000, C219S483000, C307S039000

Reexamination Certificate

active

07109447

ABSTRACT:
A cooking appliance includes a heating system which is preferably capable of combining radiant, convection, microwave and conduction heating techniques to perform a cooking operation. The cooking appliance includes a convection fan and at least one heating device. A controller is provided to regulate a triac to create a variable fan speed and variable heater intensity through phase angle firing. Essentially, an AC waveform provided to the fan motor and/or the heater resistor travels through the triac which is turned on by the controller at predetermined points in the AC waveform, with the delay from a zero point waveform crossing functioning to reduce the amount of power sent to the heater resistor and fan motor. When the signal from the controller is removed, the triac advantageously turns off at the next zero crossing of the AC waveform such that an operationally and economically effective control system is provided.

REFERENCES:
patent: 2647198 (1953-07-01), Lautner
patent: 3560824 (1971-02-01), Burke
patent: 3752956 (1973-08-01), Cahill et al.
patent: 3927345 (1975-12-01), Licata et al.
patent: 4328408 (1982-05-01), Lawson
patent: 4332992 (1982-06-01), Larsen et al.
patent: 4335290 (1982-06-01), Teich
patent: 4395233 (1983-07-01), Smith et al.
patent: 4720623 (1988-01-01), DiCesare et al.
patent: 4865864 (1989-09-01), Rijswijck
patent: 4869876 (1989-09-01), Arfman et al.
patent: 4923681 (1990-05-01), Cox et al.
patent: 4940869 (1990-07-01), Scholtes et al.
patent: 5254823 (1993-10-01), McKee et al.
patent: 5347104 (1994-09-01), Morishima et al.
patent: 5438914 (1995-08-01), Höhn et al.
patent: 5668920 (1997-09-01), Pelonis
patent: 5756974 (1998-05-01), Hong
patent: 5805767 (1998-09-01), Jouas et al.
patent: 5861720 (1999-01-01), Johnson
patent: 6060701 (2000-05-01), McKee et al.
patent: 6097000 (2000-08-01), Frasnetti et al.
patent: 6218650 (2001-04-01), Tsukamoto et al.
patent: 6262396 (2001-07-01), Witt et al.
patent: 6262406 (2001-07-01), McKee et al.
patent: 6291808 (2001-09-01), Brown
patent: 6307185 (2001-10-01), Loveless
patent: 6337468 (2002-01-01), Worthington et al.
patent: 6376817 (2002-04-01), McFadden et al.
patent: 6384381 (2002-05-01), Witt et al.
patent: 6403937 (2002-06-01), Day et al.
patent: 6472647 (2002-10-01), Lee et al.
patent: 6525301 (2003-02-01), Graves et al.
patent: 6528773 (2003-03-01), Kim et al.
patent: 6541746 (2003-04-01), Kim et al.
patent: 6566638 (2003-05-01), Brown
patent: 6595117 (2003-07-01), Jones et al.
patent: 6603102 (2003-08-01), Brown et al.
patent: 2002/0134778 (2002-09-01), Day et al.
patent: 2003/0085221 (2003-05-01), Smolenski et al.
patent: 2005/0091878 (2005-05-01), Yang et al.

Affiliated with

Also associated with

Rating

Control system for cooking appliance employing convection... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control system for cooking appliance employing convection..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system for cooking appliance employing convection... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3569750