Low refrigerant charge detection system for a heat pump
US5186014A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1992 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Jul 13, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2500/222
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A low refrigerant charge detector is operatively connected in either the suction or discharge line of a compressor of a heat pump system, wherein the compressor is in turn connected to a reversing valve. The detector includes a pressure sensor connected in one line and transmits pressure readings to a computer. During reversal of the flow of liquid in the system by the reversing value, the time at which the pressure exceeds or drops below a predetermined value is measured. The comparison depends on if the sensor is connected in the suction line or discharge line. If the time exceeds a minimum time, a low charge of refrigerant is indicated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.