Determining the amount of working fluid in a refrigeration or heat pump system
US5724822A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1995 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Jun 26, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a compressor-operated refrigeration or heat pump system (10), the existing values of at least two variable quantities, consisting of the temperature or the pressure at different preselected places (16, 17, 18, 19) in the system (10), are sensed. The sensed values of said quantities or at least one value of at least one other variable quantity, derived from said sensed values, being utilized for determining the existing amount of working fluid in the system (10) based upon a previously established relationship between said amount and the value or values, respecitvely, of the utilized quantity or quantities. At least two different preliminary approximate values of the amount of working fluid are determined while utilizing values of at least partially different variable quantities, whereupon a resultant approximate value is determined based upon said preliminary values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.