Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7228692 | Defrost mode for HVAC heat pump systems | Julio Concha, Yu H. Chen, Young Kyu Park | 2007-06-12 |
| 7225629 | Energy-efficient heat pump water heater | Julio Concha, Bryan A. Eisenhower | 2007-06-05 |
| 7051542 | Transcritical vapor compression optimization through maximization of heating capacity | Yu H. Chen, Lili Zhang | 2006-05-30 |
| 7028494 | Defrosting methodology for heat pump water heating system | Nicolas Pondicq-Cassou, Jean-Philippe Goux, Yu H. Chen, Julio Concha, Sylvain Douzet | 2006-04-18 |
| 7024883 | Vapor compression systems using an accumulator to prevent over-pressurization | Yu H. Chen | 2006-04-11 |
| 7010925 | Method of controlling a carbon dioxide heat pump water heating system | Yu H. Chen, Bryan A. Eisenhower, Julio Concha, Young Kyu Park, Lili Zhang +2 more | 2006-03-14 |
| 6968708 | Refrigeration system having variable speed fan | Sivakumar Gopalnarayanan, Yu H. Chen, Lili Zhang | 2005-11-29 |
| 6925821 | Method for extracting carbon dioxide for use as a refrigerant in a vapor compression system | — | 2005-08-09 |
| 6907923 | Storage tank for hot water systems | — | 2005-06-21 |
| 6898941 | Supercritical pressure regulation of vapor compression system by regulation of expansion machine flowrate | — | 2005-05-31 |
| 6813895 | Supercritical pressure regulation of vapor compression system by regulation of adaptive control | Bryan A. Eisenhower, Christopher Park, Pengju Kang, Alan Matthew Finn | 2004-11-09 |
| 6739141 | Supercritical pressure regulation of vapor compression system by use of gas cooler fluid pumping device | J. Michael Griffin | 2004-05-25 |
| 6698234 | Method for increasing efficiency of a vapor compression system by evaporator heating | Sivakumar Gopalnarayanan, Lili Zhang | 2004-03-02 |
| 6658888 | Method for increasing efficiency of a vapor compression system by compressor cooling | Shailesh Manohar, Scott M. MacBain, Young Kyu Park | 2003-12-09 |
| 6606867 | Suction line heat exchanger storage tank for transcritical cycles | — | 2003-08-19 |
| 6418735 | High pressure regulation in transcritical vapor compression cycles | — | 2002-07-16 |
| 6385980 | High pressure regulation in economized vapor compression cycles | — | 2002-05-14 |
| 6070420 | Variable refrigerant, intrastage compression heat pump | Frank R. Biancardi, David J. McFarlin, Raymond L. DeBlois | 2000-06-06 |
| 5997825 | Refrigerant disposal | Sunita Satyapal, H. Harvey Michels, James D. Freihaut | 1999-12-07 |
| 5848537 | Variable refrigerant, intrastage compression heat pump | Frank R. Biancardi, David J. McFarlin, Raymond L. DeBlois | 1998-12-15 |
| 5822996 | Vapor separation of variable capacity heat pump refrigerant | Dennis R. Pandy | 1998-10-20 |