초록 ▼

A system and a process for heat treatment of glass or other materials where fan air is blown into a heating chamber via propellant air fans and the chamber air is circulated. In order to achieve effective convection, the propellant air fans have cylindrical mixing sections. Additionally, resulting

A system and a process for heat treatment of glass or other materials where fan air is blown into a heating chamber via propellant air fans and the chamber air is circulated. In order to achieve effective convection, the propellant air fans have cylindrical mixing sections. Additionally, resulting air swirls flow around the heating means which are located in the heating chamber.

대표청구항 ▼

What is claimed is: 1. A system for heat treatment of glass, comprising: a heating chamber; at least one heating means for radiant heating within the heating chamber; a compressor located outside of the heating chamber; and a guiding means for supplying compressed gas from the compressor to the hea

What is claimed is: 1. A system for heat treatment of glass, comprising: a heating chamber; at least one heating means for radiant heating within the heating chamber; a compressor located outside of the heating chamber; and a guiding means for supplying compressed gas from the compressor to the heating chamber, wherein the guiding means comprises a plurality of air flow amplifiers positioned within the heating chamber for producing gas swirls in the heating chamber, in order to additionally heat the glass by intensified convection, wherein at least one gas swirl brushes against or flows around at least one heating means, wherein each air flow amplifier includes a tubular component with an open inlet side and an open outlet side that defines a mixing section with a constant clear diameter or cross section for conveying gas by in-flowing compressed gas and for mixing chamber gas and compressed gas, wherein the compressed gas is supplied to each air flow amplifier in a through-flow and central direction by a nozzle associated with each air flow amplifier on the inlet side thereof, and wherein the air flow amplifiers or their mixing sections are oriented at least substantially vertically. 2. The system as claimed in claim 1, wherein the entire volumetric flow of gas flowing out of each air flow amplifier, measured at an ambient temperature in the system, is greater by a volumetric factor of at least 30 than the volumetric flow of the gas which is supplied to the air flow amplifier. 3. The system as claimed in claim 1, wherein the air flow amplifiers or the mixing sections thereof have a ratio of length (L) to clear diameter (D) of at least 4. 4. The system as claimed in claim 1, wherein the air flow amplifiers or the mixing sections thereof have a length (L) of at least 15 cm. 5. The system as claimed in claim 1, wherein the air flow amplifiers or the mixing sections thereof have a clear diameter (D) of at least 10 mm. 6. The system as claimed in claim 1, wherein the volumetric flow of supplied gas air flow amplifier, measured at an ambient temperature in the system, is at most 2 m3/h. 7. The system as claimed in claim 1, wherein the total volumetric flow of gas flowing from each air flow amplifier is at least 20 m3/h. 8. The system as claimed in claim 1, wherein the nozzle is located concentrically within the mixing section of the air flow amplifier and projects into it. 9. The system as claimed in claim 1, wherein the nozzle has an opening with a diameter (DD) of at most 2 mm. 10. The system as claimed in claim 1, wherein the nozzle has an opening with a length (DL) of 1 to 12 mm. 11. The system as claimed in claim 1, wherein the nozzle has an opening with a diameter (DD) of at most 2 mm, wherein the nozzle has an opening with a length (DL) from 1 to 12 mm and wherein the ratio DL/DD is between 3 and 5. 12. The system as claimed in claim 1, wherein the air flow amplifiers further include a confliser, the confuser having a ratio of an inlet diameter to an outlet diameter of less than 1.5 or a length which is at most 5% of the length L of the mixing section, located downstream. 13. The system as claimed in claim 12, wherein the nozzle is located centrally in the associated mixing section and projects into it, and wherein the exit opening of the nozzle, measured at the ambient temperature in the system, is at the height of the transition from the mixing section to the confuser. 14. The system as claimed in claim 1, wherein the air flow amplifiers do not include diffusers. 15. The system as claimed in claim 1, wherein the air flow amplifiers are located at a distance of 5 to 15 cm from the glass. 16. The system as claimed in claim 1, wherein the air flow amplifiers are arranged in rows on nozzle beams of the guiding means which run transversely to a conveying direction of the glass. 17. The system as claimed in claim 1, wherein the heating means extend parallel to nozzle beams of the guiding means which bear the air flow amplifiers. 18. The system as claimed in claim 1, wherein the heating means are located above the air flow amplifiers and laterally offset to or between them. 19. The system as claimed in claim 1, wherein the nozzle is connected to the guiding means via a screw connection. 20. The system as claimed in claim 1, wherein a mechanical connection is provided between the air flow amplifier and the guiding means, and wherein the mechanical connection is adapted to maintain centering of the nozzle in the respective mixing section despite temperature fluctuations and resulting material expansions and contractions. 21. The system as claimed in claim 20, wherein the mechanical connection between the air flow amplifier and the guiding means has an annular section with two annular section ends, wherein the two annular section ends are connected to the air flow amplifier and wherein the guiding means is connected to the annular section between the ends thereof. 22. The system as claimed in claim 21, wherein the nozzle is connected to the guiding means via a screw connection, and wherein the annular section has a hole through which a component of the nozzle can be routed for connecting the guiding means and the annular section. 23. The system as claimed in claim 1, wherein, in operation, unheated gas is supplied to the air flow amplifier. 24. The system as claimed in claim 1, wherein the heating means is one of a resistance heater, a radiant heater or a gas burner. 25. The system as claimed in claim 1, wherein the system further comprises a conveyor means for delivering the glass. 26. The system as claimed in claim 25, wherein the conveyor means has several rollers for carrying the glass.