Abstract: A method for controlling and adjusting the refrigeration capacities of a refrigeration system equipped with a double suction compressor, the refrigeration system including first and second compartments to be refrigerated and including first and second evaporators respectively positioned in the first and second compartments. The double suction compressor is controlled to alternate its compression capacity with high-frequency between first and second refrigerant suction lines respectively associated with the first and second evaporators such that the first and second compartments are simultaneously cooled. The compression capacity of the compressor is applied to the first and second suction lines based upon respective first and second duty cycles that together account for 100 percent of the compression capacity of the compressor. First and second temperature sensors are associated with the first and second compartments and provide temperature values that are used to select the first and second duty cycles.
Type:
Grant
Filed:
August 22, 2016
Date of Patent:
July 2, 2019
Assignee:
Embraco Industria de Compressores e Solucoes em Refrigeracao Ltda.
Inventors:
Gunter Johann Maass, Dietmar Erich Bernhard Lilie, Marcos Guilherme Schwarz
Abstract: The present invention refers to methods for controlling a double suction compressor for application in refrigeration systems, capable of meeting the different demands for cost, efficiency and control of temperatures by means of techniques of complexity levels and different configurations of the elements from the control loop (temperature sensors, actuators, controllers, etc.).
Type:
Grant
Filed:
December 9, 2011
Date of Patent:
June 11, 2019
Assignee:
Embraco Indústria de Compressores e Soluções em Refrigeração Ltda.
Inventors:
Gunter Johann Maass, Dietmar Erich Bernhard Lilie, Marcos Guilherme Schwarz
Abstract: The arrangement of the present invention is applied to a compressor which comprises a bearing hub housing a crankshaft and presenting at least a first and a second bearing portion, spaced apart by a circumferential recess. The crankshaft presents at least a first and a second support portion, spaced apart by a circumferential recess, which is offset from the circumferential recess of the bearing hub. At least one of the bearing portions and support portions has an axial extension superior to that required for radially bearing the crankshaft, the first and second bearing portions defining, with the first and second support portions, respectively, a first and a second radial bearing regions having the axial extensions required for a radial bearing for the crankshaft, presenting lower loss by viscous friction.
Type:
Grant
Filed:
April 28, 2017
Date of Patent:
June 4, 2019
Assignee:
Embraco-Industria De Compressores E Solucoes EM Refrigeracao Ltda.
Abstract: A variable capacity compressor (100), a cooler (200) including same, and a method and system for controlling a variable capacity compressor are disclosed.
Type:
Grant
Filed:
January 9, 2017
Date of Patent:
May 28, 2019
Assignee:
Embraco Indústria de Compressores e Soluções em Refrigeração Ltda