Abstract: The sliding window uses the sash equipped with pulleys to slide on the track on the window frame. The advantage of this kind of window is that the window does not occupy extra space no matter when the window is in the open or close state, and the structure is relatively simple. In the past, people always said to open the window, but now it seems to be more open. Sliding windows are generally most suitable for high-rise buildings with more than two floors, because the opening method is sliding, and the windows will not be outside like casement windows. In order to avoid the incident of falling objects on the windows, sliding windows are most suitable for high-rise buildings. In addition, sliding windows have a better sealing effect and are cheaper than casement windows, so they are very popular. Let's take a look at the knowledge of sliding windows.

Main features of sliding windows

One is to increase the energy saving effect by 9.7%. Because 42% of the total length of the frame sash gap is reduced, that is, the air penetration loss of the window is reduced from 23.1% to 13.4%, which not only reduces energy loss, but also improves the room environment.

The second is to improve water tightness. The root of the outer slideway corresponding to the push-pull fan can be drilled and milled horizontally to the drain hole without setting up another drain cavity. Not only the drain hole processing technology is simple, but also the airtightness will not be reduced no matter how large the drain hole is; The glass is directly embedded on the window, which not only has good airtightness, but also prevents the chance of rainwater entering the inside of the window frame.

The third is that the screen fan is clamped on the outdoor side of the window frame with screen clips. The screen window frame is not easy to deform, and it is very tightly attached to the window frame around it, and it avoids mosquitoes and flies entering the room when the screen fan must be opened and closed at the same time when the switch is pushed and pulled. Chance.

Fourth, the glass beading of the fixed fan must be installed on the outdoor side. Although it is not convenient for maintenance and replacement of glass in the future, it is conducive to watertightness and decoration.

The fifth is to save materials and reduce costs. If the weight per meter of the profile used for the fixed sliding window is exactly the same as that of the current sliding window, then the window sash profile can be saved by 50%, and 1/3 of the window sash profile can still be saved minus the added window sash profile. Taking a double-leaf sliding window of 1000×1000 as an example, if the length of profile per meter is calculated as 0.9 kg, 1.8 kg of material can be saved. According to the market price of general profiles, more than 20 yuan can be saved, and two pulleys can be saved. The cost saving of the window is about 25 yuan, which is equivalent to about 10% of the current selling price.

The sixth is the type of structure that can be made, with two push-pull fans in the middle, pushing to both sides, the room looks more spacious and bright.

How to improve the energy-saving effect of sliding windows

The importance of building energy conservation has become a national policy well-known to every household and to all women and children. The purpose of energy saving is to reduce the ineffective loss of energy, improve energy utilization rate, and make limited energy fully serve human production and life.

So, what are the differences between sliding windows and casement windows? Everyone will say with one voice, first, the ventilation area is less than 50%; second, the air tightness is poor.

First study the ventilation area. Generally speaking, after the external dimensions of the window are determined, the ventilation area depends on the size of the opening sash. For horizontal sliding windows and vertical sliding windows, the sash must move horizontally or vertically in the window frame to complete the switching function. , the maximum stroke of the window sash moving in the window frame is always less than 1/2 of the width or height of the window frame. When the sliding window is fully open, half of it must be closed, and the ventilation area will never exceed 50%, which is Determined by the structure of the sliding window. Of course, if multi-slide profiles are used, the ventilation area will be greater than 50%, but it will never reach 100% ventilation, so there is no need to study this issue.

Regarding air tightness, when the sliding sash is opened and closed, in the relative movement between the frame and the sash, there are both the rolling of the pulley and the frictional movement between the top and the profile. The greater the friction force, the tighter the seal at the gap. The tighter the window sash, the greater the opening and closing force. To ensure the opening and closing force, the tightness of the seal has to be reduced, which will inevitably lead to a decrease in air tightness, which is not conducive to energy saving. Let’s analyze the unit of measurement that characterizes the airtightness of doors and windows. The quality of airtightness, that is, the amount of air infiltration, is expressed by the length of the door and window gap per meter and the volume of permeable air per hour. To measure the air infiltration of doors and windows, under the conditions of standard ambient temperature and standard indoor and outdoor pressure difference, use an air flowmeter to measure the volume of air infiltrated by the entire window within one hour, and divide it by the overlap of the frame and leaf of the window The total length of the gap is the airtightness index of the window.

The current plastic sliding windows, especially the sliding windows used in civil residential buildings, generally have a width of 1200-1800 and a height of 1400-1500. When they are made into double-leaf sliding windows, no matter whether they open the left fan or the right fan, there is always a In the closed state, the total length of the overlapping gap of the frame and sash = height × 3 + width × 2. Since one door is always closed, why not make it permanent? If one is pushed and pulled and the other is fixed, the total length of the gap can be reduced by 42%, and the air penetration loss of doors and windows can be reduced from 23.1% to 13.4%, and it can save materials and man-hours and reduce costs. Improve the economic and social benefits of the enterprise.
In order to improve the structure of the plastic sliding window and improve the energy-saving effect, the following three design schemes are proposed for discussion or selection. The window with this structure is temporarily called a fixed sliding window.

Option 1: The outer side of the window is a fixed window, the inner side is a sliding window, and the hanging gauze fan is outside.

Option 2: The push-pull fan is on the outdoor side, the fixed fan is on the indoor side, and the gauze fan is flat-opening indoors.