Refrigerant recovery and recharging system with automatic oil drain
US6138462A · kind A · utility
18Cited by
24References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1999 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Mar 19, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2345/003
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A conduit is coupled to an oil accumulator with an orifice coupled in series with the conduit for limiting the flow of oil therethrough. A pressure sensor is coupled to the conduit for measuring the pressure in the conduit. An oil drain control solenoid valve is coupled to an electrical circuit also coupled to the pressure sensor for selectively opening the oil drain for the draining of oil into a collection tank without losing refrigerant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.