How to close a double-walled glass tube in a vacuum-tight manner

摘要

The present invention relates to a method for closing a double-walled glass tube 206 in a vacuum-tight manner and a manufacturing method for producing devices 200, 300, 400, in particular solar collectors. Electroconductive heating and subsequent deformation of the double-walled glass tube 206 is achieved by the provided vacuum chamber in which the holding element is fixed and the heating conductors 202, 204, 301, 302, 401, 402 are arranged. Can. No additional materials such as metal auxiliary elements or solder are required. A simple installation of the vacuum chamber is possible and a minimum required vacuum feedthrough for the heat conductor current source is required. Direct heat transfer to the double wall glass tube 206 and correspondingly fast process control allows the double wall glass tube 206 of the thermal solar collector 206 to be reliably closed under vacuum using simple means. . [Selection] Figure 3