What are the drainage methods of aluminum alloy doors and windows of sliding door manufacturers?

1. Bright drainage, that is, to open a hole along the bottom of the window groove to the outside of the window frame. If there is stagnant water, it will flow down the hole to the outside side, and a drain hole cover will be fastened to prevent mosquitoes from entering through the hole.
2. Hidden drainage, the principle of hidden drainage is to open a hole at the bottom of the window groove, the difference between the hole and the open drainage is one to the side, one to the bottom, so that the water will flow to the window frame according to the water pressure, but the water does not flow out? Also in order to avoid mosquitoes, it is also necessary to have a hole cover.
3. Floor drain drainage, the principle is the same as the hidden drainage structure, in order to avoid the loss of the drainage hole cover, open a hole at the bottom of the window frame, and at the same time also open a hole on the outside of the window frame, and install a special drainage hole cover plug between the two holes, and put screws on it to avoid loss and dislocation.