Refrigeration system
US4829777A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1987 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Jul 14, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/1352
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A condenser is connected to an outlet of a compressor. An expansion valve is connected to the condenser. An evaporator is connected between the expansion valve and an inlet of the compressor. A sensor detects a condition of refrigerant at an outlet side of the evaporator. A variation in rate of refrigerant flow into the evaporator is detected. A control device determines a variation in the detected condition of refrigerant which occurs in response to the variation in the rate of refrigerant flow. The control device judges a quantity of refrigerant to be insufficient when the determined variation in the refrigerant condition is equal to or smaller than a reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.