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:
Dec. 06, 1988
Filed:
Nov. 25, 1987
Michael J Brandemuehl, Manlius, NY (US);
John R Reason, Liverpool, NY (US);
Carrier Corporation, Syracuse, NY (US);
Abstract
A method of closely controlling the supply air temperature delivered from an air conditioning unit into a mobile cargo container wherein the supply air temperature is compared to a desired set point temperature and a suction control valve in the air conditioner compressor inlet line is adjusted in response to the sensed difference between the supply air temperature and the set point temperature. Three different preprogramed control modes are available which are selected automatically in response to the amount of deviation between the compared temperatures that are used to bring the supply temperature down to the set point temperature and hold it under steady state conditions within .+-.0.25.degree. C. of the set point. A trim heater is placed in the supply air passage to warm the supply air any time the control valve is in a full closed position. This increases the heating load on the unit so that operating time of the unit will be prolonged and the compressor will not be cycling ON and OFF.