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. 03, 2009
Filed:
Dec. 27, 2004
Pengju Kang, Hartford, CT (US);
Alan M. Finn, Hebron, CT (US);
Sivakumar Gopalnarayanan, Simsbury, CT (US);
Dong Luo, South Windsor, CT (US);
Timothy P. Galante, West Hartford, CT (US);
Pengju Kang, Hartford, CT (US);
Alan M. Finn, Hebron, CT (US);
Sivakumar Gopalnarayanan, Simsbury, CT (US);
Dong Luo, South Windsor, CT (US);
Timothy P. Galante, West Hartford, CT (US);
Carrier Corporation, Farmington, CT (US);
Abstract
A method and apparatus for determining the sufficiency of the refrigerant charge in an air conditioning system by use of temperature measurements. The temperature of the liquid refrigerant leaving the condenser coil and the outdoor temperature are sensed and representative electrical signals are generated. The electrical signals are converted to digital values that are than compared to predetermined optimal values to determine whether the system is properly charged with refrigerant. An appropriate LED is lighted to indicate that the system is undercharged, overcharged or properly charged. For non-TXV/EXV systems a third parameter i.e. the return air wet bulb temperature is also sensed and a representative digital value thereof is included in the comparison with the predetermined known values to determine if the charge is proper.