Pulsating hot-air heat-up system
US4307286A · kind A · utility
Inventor
Key dates
| Filing date | Nov 27, 1979 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Nov 27, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D2400/30
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for rapidly raising the temperature of a product having low thermal conductivity from a cold to a heated state in a manner bringing the internal temperature of the entire body of the product to substantially the same predetermined elevated temperature level. The system includes a chamber having a fluid-permeable product receiving section flanked by input and output plenums, and a main flow loop in which the chamber is connected in a continuous flow path in series with a heater station and an air pump in an arrangement in which air drawn from the output plenum and creating a negative pressure therein is conducted through the heater station and then forced in the heated state through an input line leading into the input plenum to create a positive pressure therein. The resultant pressure differential between plenums causes heated air to flow at high velocity through the section to heat the product therein. A bypass extending between the input to the heater station and the junction of the chamber and the pump in the main flow loop defines a feedback flow loop which excludes the chamber. A damper mechanism at this junction is cyclically operated to periodically block the flow …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.