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:
Nov. 11, 1980
Filed:
Jul. 12, 1979
Dale A Mueller, St. Paul, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A compressor start fault detection and control system for a reverse cycle refrigeration system for detecting faulty compressor startup operation and for controlling the system in response to the detection of a fault by inhibiting the compressor and for providing a fault indication, the control system comprising a controller means receiving an input indicative of the temperature of the compressor discharge refrigerant and an output indicative of a demand from a building temperature sensing means for heating or cooling of the building. The controller means also includes (i) timing means, (ii) means for comparing the value of the compressor discharge temperature at the time of compressor start up and the value of the compressor discharge temperature after the compressor has been operating for a preselected time interval and (iii) means to inhibit any further operation of the compressor means unless the value of the later compressor discharge temperature is greater than the value of the initial or start up compressor disclosing temperature plus a preselected constant.