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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.:

US 7552596 B1

PDFFull Text
Expired
Date of Patent:
Jun. 30, 2009

Filed:

Dec. 27, 2004

Dual thermochromic liquid crystal temperature sensing for refrigerant charge indication

Applicants:

Timothy P. Galante, West Hartford, CT (US);

Sivakumar Gopalnarayanan, Simsbury, CT (US);

Don Alan Schuster, Lindale, TX (US);

Craig R. Kersten, Mooresville, IN (US);

Larry Burns, Avon, IN (US);

Inventors:

Timothy P. Galante, West Hartford, CT (US);

Sivakumar Gopalnarayanan, Simsbury, CT (US);

Don Alan Schuster, Lindale, TX (US);

Craig R. Kersten, Mooresville, IN (US);

Larry Burns, Avon, IN (US);

Assignee:

Carrier Corporation, Farmington, CT (US);

Attorney:

Marjama Muldoon Blasiak & Sullivan LLP

Primary Examiner:

Marc E Norman

Int. Cl.
CPC ...
F25B 49/00 (2006.01); F25B 45/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

The sufficiency of refrigerant charge in an air conditioning system is determined by a comparison of two sensed temperatures in the system, one being the liquid line temperature and the other being either the outdoor temperature or the condenser coil temperature. In one embodiment the two sensed temperatures are displayed on respective thermochromic strips which are so calibrated and juxtaposed as to provide a visual indication, by the relative positions of the two displayed sensed temperatures, as to whether the refrigerant charge is adequate. In another embodiment, the sensed liquid line temperature is displayed by way of a plurality of LEDs and the other temperature is displayed by way of a marker on a temperature scale. If the two displayed temperatures are aligned, then the refrigerant charge is optimized, and if they are not aligned, the system is undercharged or overcharged.

Find Patent Forward Citations

Galante, Timothy. (2009). Dual thermochromic liquid crystal temperature sensing for refrigerant charge indication (U.S. Patent No. 7552596). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7552596

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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