Charge management for 100% heat recovery units
US7237394B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2004 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Dec 24, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/21163
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An apparatus for managing refrigerant charge in an air conditioning unit comprising a cooling circuit through which a refrigerant flows from a compressor, through a condenser, and through an evaporator, a heat recovery circuit extending from a first terminus between the compressor and the condenser to a second terminus between the evaporator and the condenser, a heat recovery unit located between the first and second terminus of the heat recovery circuit, a first valve located between the condenser and the first terminus, a second valve located between the first terminus and the heat recovery unit, a third valve located on a cooling charge circuit having a first end on the cooling circuit between the condenser and the evaporator and a second end at the evaporator, a fourth valve located on a heating charge circuit having a first end on the heat recovery circuit and a second end at the evaporator, and a logic unit for sensing a saturated temperature and opening and closing the valves based upon the saturated temperature to manage the refrigerant charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.