Window frame system, thermally insulating element, method, window frame structure, flexible profile, control system and sun protection system

A window frame system configured to fix at least one first panel, the window frame system comprising:

• at least a first window frame structure comprising
• at least a first window frame profile which is provided with at least a first holder, a second holder, and a third holder,
• at least a second window frame profile defining at least a fourth holder and a fifth holder, the fifth holder being defined by a portion of the second window frame profile at an end of the fourth holder directed to the center of window frame system, the second window frame profile being configured to be positioned relative to the first window frame profile, the first, the second, and the third holders being oriented towards the fourth and the fifth holders,
• at least a first thermally insulating element which has at least a first end and a second end, the first end being configured to be received in the first holder and the second end being configured to be received in the fourth holder to connect together the first and the second window frame profiles,
• at least a first flexible profile comprising
• a first sealing element configured to be positioned in lying contact with at least the first window frame profile and a first plate of a first panel configured to be received in the window frame system,
• a first coupling element configured to be received by form-fit in the third holder, and
• a second coupling element configured to be received by form-fit in the second holder of the first window frame profile, at least a first glass lath configured to be coupled to a second plate of the first panel that is configured to be received in the window frame system, the first glass lath comprising at least a third coupling element configured to be received by form-fit in the fifth holder of the second window frame profile,
• wherein the second and the third holders of the first window frame profile, and the fifth holder of the second window frame profile, in use of the window frame system, comprise at least one internal corner with a radius smaller than 0.5 mm.