Refrigerant compressor protecting device
US4265091A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1980 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | Apr 21, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2500/222
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for protecting a refrigerant compressor against troubles resulting from shortage of the refrigerant, including two temperatures sensing units so disposed as to monitor temperatures of compressor outer wall or of the refrigerant near inlet and outlet of the compressor. Outputs from the two temperature sensing units are applied to inputs of a judging unit which generates a signal in the event it judges a refrigerant amount is insufficient through examining the inputs against a specific relationship known between the inlet and outlet temperatures as measured while the refrigerant amount is held at a predetermined lower limit. The signal is then transferred to a working means which automatically turns off the compressor and/or takes other proper actions necessary for protecting the compressor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.