Oven provided with oxygen concentration controls
US4975047A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 19, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Jul 19, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2019/0012
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A test oven wherein heated air having a predetermined temperature is supplied and the oxygen concentration in the supplied air is controlled. The test oven has a test oven body having an air supply port and an air discharge port, a blower connected to the air supply port for blowing air thereinto, an oxygen concentration detector connected to the test oven body, an oxygen concentration setting control unit connected to the oxygen concentration detecting detector and including an oxygen concentration setter for setting a desired level of oxygen, and an oxygen concentration controller constantly comparing a reference output level generated on the basis of a concentration level set in advance in the oxygen concentration setter with an output level outputted from the oxygen concentration detector and for controling the actual output level to a set level, and at least one oxygen concentration adjusting device. This can be an oxygen and nitrogen supply unit controlled by the oxygen concentration setting control unit for supplying an amount of oxygen and/or nitrogen to an air circulating passage upstream of the blower for regulating the concentration of the oxygen in response to the actua…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.