1. The sealing problem of aluminum alloy doors and windows: the biggest problem of the push-pull system is the poor sealing
In Beijing, the mainstream of doors and windows is still sliding windows. However, due to the simplicity and objective limitations of doors, most of them are sliding doors. However, there are some problems with simple sliding doors. If you imagine the heat convection inside and outside a door, how big is this impact? ?
In many projects, it will be found that due to insufficient thermal insulation materials for casement windows, some good thermal insulation strips also have the phenomenon of throttling, but sliding windows do not. Therefore, the use of simple sliding doors is actually beneficial to the entire building energy-saving system. Said, forming one of the biggest weak links. Talking about the lock system of doors and windows, we often see the single-point lock system. Generally speaking, it must have a certain degree of wind resistance. In the sliding door system, the lock wall of the entire door is only a limit system, which does not allow the door to be locked. Free movement, simple push-pull systems are all mobile, and they cannot move when they touch the window frame. The entire sunken window frame does not form a pressure structure. In a sense, this lock point is very fragile against anti-theft Said to have the effect of anti-theft, for the whole effect, the applicability has not improved.
In Europe, there are many uses for sliding doors, and the most common is the inward sliding door system. Passing the Buick commercial vehicle is the inward sliding door system. For the application of a simple sliding door, it may be calculated that the thermal insulation can be achieved due to the use of the thermal insulation base material, but it is unfavorable for the essence of use.
China's door and window testing standards require that all opening seams completely ignore the influence of air tightness, and do not test the air tightness of the entire frame system or the complete door and window system. This is essentially different from the European standard. The European testing system is to send the complete window directly from the hole to the laboratory for testing. If the window leaks, the heat insulation reaches 40%, and the test cannot pass. When using China to pass the inspection doors and windows, it will still feel cold in winter.
2. The design of aluminum alloy doors and windows is regrettable: there is one more layer in the thermal insulation aluminum alloy door and window system.
In China, there are two arguments for placing this layer in the room, one is anti-theft, and the other is easy to disassemble. The second reason is that it exists, especially in high-rise buildings. As for the anti-theft function, it is completely unnecessary.
For an outward opening window, the insulating glass is on the outside, and the thermal insulation profile system must use two-way structural profiles, and one-way can also be used. It is not possible to open it large, and if a large amount of insulating glass is pressed on the outside, it is difficult to divide the force into two points. The thermal insulation aluminum alloy door and window system is a composite structure, and any link cannot be weak. As long as one link is weak, the entire frame system can play a role.
As a feature of the thermal insulation aluminum alloy door and window system, due to the lack of design, the structure has undergone qualitative changes, which cannot be understood in the traditional home improvement process. This is a very critical point.
3. The acceptance defect of aluminum alloy doors and windows: the result of brutal operation is to move the handle up to a position of 30 degrees
During the transportation of doors and windows, when the doors and windows of the project are installed, when the doors and windows of a car are unloaded, they will find that there are basically no first-level constructors on them. There are bumps in the process of transportation. It is a fatal injury, so there will be no such thing in the door and window factory.
When it comes to hardcover, we generally say that hardcover is a high-end room, but the characteristics of interior decoration workers: they do not know doors and windows, and often hardcover projects choose high-end door and window systems, but they do not understand for general decoration, and wait until the end of hardcover. At times, the small owner will find that the hardware of the doors and windows should be closed and opened like this, but finally found that the handle is moved up 30 degrees, and when it is opened, it goes up with a hand. This is the improper use of the interior workers and brutal operation. the result of. Most small owners see their doors and windows in this situation when they move in, I believe it is difficult to accept.
Hardware is the two major functions, one is to lock the wall, and the other is to bear the load. A systematic process, as a door and window, from the factory to the construction site, design to transportation, installation, acceptance, including the replacement of problems, including the owner's personalized needs for doors and windows. Throughout the process, there needs to be perfect expression.
Fourth, the bump problem of aluminum alloy doors and windows: must be solved in time
When the aluminum alloy door and window sash is less than 650, the outside and the main rubber strip will collide, which is fatal. What is the sound of the bump? When I hear a click when it is opened, how will the workers solve it? I quickly hit it with my hands a few times. Is there any sound? Why not? Maybe the rubber strip has been knocked off. , the main seal of aluminum alloy doors and windows can not be achieved.
The wind pressure resistance performance of doors and windows has always been relatively simple. Professional door and window factories must provide corresponding calculation books. I went to Shandong to see a project two days ago. To strengthen the center, it must be a piece with protrusions on the rigid profile, but The protruding part should be connected with the wall accordingly, and the two ends must be fixed. When the reinforcement is deep enough to be below the plane, there will be a problem. One end leaks there, one end is fixed, and the other end is shaking. This reinforcement is absolutely necessary. Some profiles are bought with money, and if used improperly, they will lose their meaning.