Air velocity control for efficient product temperature cycling
US5551169A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1994 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Sep 28, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1934
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The temperature of air to heat or cool a product (16, 18) is maintained constant at levels which respectively are substantially higher or lower than the goal temperatures at which the respective products are to be stressed. Controllers (68, 70)having temperature/time profiles (72, 74) control the velocity of this higher or lower temperature air, as supplied by closed loops (20, 22) from high and low temperature sources (24, 26) to the products in their environmental stress chambers (12, 14), or bypassed through bypass conduits (50, 52) to maintain or change the temperatures of the products. High and low temperature sources (24, 26) and the product stress chambers (12, 14) may be interconnected by a cross-over arrangement of branches (80, 82, 84 and 86) to economize energy for heating or cooling the air, and to enable both environmental chambers (12, 14) to be interchangeably used for stress heating or cooling and, thus, to avoid movement of a product for the same purpose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.