The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2005
Filed:
Sep. 06, 2002
Paul E. Sigafus, Medina, MN (US);
Ralph H. Torborg, Big Lake, MN (US);
James W. Ratz, Bloomington, MN (US);
Larry L. Lutton, Burnsville, MN (US);
Paul E. Sigafus, Medina, MN (US);
Ralph H. Torborg, Big Lake, MN (US);
James W. Ratz, Bloomington, MN (US);
Larry L. Lutton, Burnsville, MN (US);
Varidigm Corporation, Plymouth, MN (US);
Abstract
A heating or cooling system, such as an HVAC system, of variable output has a number of control elements and may include a variable speed compressor, a variable speed combustion (induced or forced draft) blower motor; a variable speed circulator blower motor; a variable output gas valve or gas/air premix unit; and a controller specifically developed for variable output applications. The system may utilize a pressure sensor to determine the actual flow of combustion airflow in response to actual space conditions, vary the speed of the inducer blower, and subsequently vary the gas valve output to supply the correct amount of gas to the burner system. A temperature sensor may be located in the discharge air stream of the conditioned air to provide an input signal for the circulator blower.