Control system and method for protection against breakage of...

Details Control system and method for protection against breakage of... Control system and method for protection against breakage of...

2011-06-14

2011-06-14

Freay, Charles G (Department: 3746)

Pumps

Condition responsive control of pump drive motor

Responsive to pump lubricant, sealant, or coolant condition

C417S044110, C417S053000, C388S806000

Reexamination Certificate

active

07959414

ABSTRACT:
The present invention relates to a control system for protection against breakage of the lubricating-oil film in the bearings of hermetic compressors, as well as to a control method that has the objective of guaranteeing that a variable-capacity compressor should be maintained above a minimum rotation in order to prevent the oil film close to the respective bearing from breaking. One of the forms of achieving the objectives of the present invention is by means of a control system for protection against break of the lubricating-oil film in bearings of hermetic compressors, a microprocessor (10) actuating a set of switches (SW2M) selectively, so as to generate a rotation at the motor-compressor assembly (20, 21), the compressor (21) having a minimum rotation (RPMmin) of the compressor (21) so that the oil film will not be broken.

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The Written Opinion for PCT Application No. PCT/BR2006/000079; Filed Apr. 27, 2006.

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