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:
Jan. 02, 1990
Filed:
Dec. 08, 1988
Applicant:
Inventor:
Robert K Havemann, Bloomington, MN (US);
Assignee:
Thermo King Corporation, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
62126 ; 62129 ; 622281 ; 62158 ;
Abstract
A monitor for detecting air leaks during the operation of a closed vapor compression refrigeration system having a refrigerant compressor driven by a prime mover. An oxygen sensor is disposed in the discharge manifold of the compressor, and the electrical output of the sensor is compared with a reference voltage by a comparator. When an air leak is detected by the comparator, refrigerant control responsive to such detection provides an alarm and/or shuts down the refrigeration system.