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. 06, 2012
Filed:
Nov. 09, 2006
Marcio Roberto Thiessen, Joinville, BR;
Paulo Sergio Dainez, Joinville, BR;
Marcio Roberto Thiessen, Joinville, BR;
Paulo Sergio Dainez, Joinville, BR;
Whirlpool S.A., Sao Paulo-SP, BR;
Abstract
A linear compressor control system includes an electronic circuit controlling an electric motor that drive a piston of the compressor, such that the motor is operated intermittently with an on-time (t) and an off-time (t) to keep the compression capacity of the compressor substantially constant. The compressor is associated with a closed cooling circuit having an evaporator and a condenser. The off-time (t) is shorter than the time necessary for the evaporation pressure (P) in the evaporator and the condensation pressure (Pc) in the condenser to equalize each other after the compressor has been turned off.