Refrigeration efficiency monitoring system
US4882928A · kind A · utility
Inventors
Key dates
| Filing date | Oct 11, 1988 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Oct 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosure is directed to a device for monitoring the thermodynamic state of a fluid flowing through a conduit. The device generally comprises a first electromechanical transducer acoustically coupled to the conduit, electronic drive means connected to the first electromechanical transducer to provide a driving electrical signal to the first electromechanical transducer whereby the first electromechanical transducer is oscillated to generate mechanical wave energy for transmission through the fluid flow, and a second electromechanical transducer acoustically coupled to the conduit and arranged in a spaced, acoustically coupled relation to the first electromechanical transducer to receive the mechanical wave energy transmitted through the fluid flow and conduit by the first electromechanical transducer and to convert the received mechanical wave energy into an electrical signal. The electric signal is integrated and conducted to an electronic device which is operable to detect changes in the electrical signal caused by a change in the thermodynamic state of the flowing fluid, to verify the time duration of detected changes in the electrical signal, to record events of detected c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.