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:
Sep. 28, 1993
Filed:
Mar. 18, 1991
Richard D Dennis, Bridgeport, NY (US);
Carrier Corporation, Syracuse, NY (US);
Abstract
In a heat pump system intended for cooling operation at lower ambient conditions, a control is provided for sensing the compressor discharge pressure and for alternately providing power to and removing power from the outdoor fan in response to the discharge pressure respectively exceeding or falling below a predetermined level. Power is provided to and removed from the motor by way of a solid state relay, and the periods in which power is removed are controlled so as to exceed those periods in which the power is applied to the motor. The fan motor is supported by journal bearings, and the periods of time in which power is removed from the motor during the cycling process is limited to 10 seconds such that the motor does not come to a complete stop, thereby ensuring proper lubrication thereto.