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Casement window
The utility model has the advantages of large opening area, good ventilation, good sealing, sound insulation, heat preservation and impermeability. The inner opening window cleaning is convenient; The open type does not take up space when opening. The disadvantage is that the window is small and the view is not wide. The opening of the external window shall occupy a space outside the wall, which is easy to be damaged in strong wind; And interior window opening takes up part of the indoor space. It is not convenient to use screen windows. It is also not convenient to use screen windows and curtains when opening windows. If the quality is not up to standard, it may also leak rain.

Sliding window
The sliding window has the advantages of simplicity and beauty, large window width, large glass block, wide field of vision, high lighting efficiency, convenient glass cleaning, flexible use, safety and reliability, long service life, opening in one plane, less space occupation, convenient screen installation, etc. At present, sliding windows are the most widely used. The disadvantage is that the two windows cannot be opened at the same time, and can only be opened half at most, so the ventilation is relatively poor; Sometimes the sealing performance is also slightly poor. Sliding window: it can be divided into left and right, up and down sliding windows. Sliding windows have the advantages of not occupying indoor space, beautiful appearance, economical price and good sealing. High grade slide rails are used, which can be opened flexibly with a slight push. With large pieces of glass, it not only increases the indoor lighting, but also improves the overall appearance of the building. The stress state of the window sash is good and not easy to be damaged, but the ventilation area is limited.

Casement window
The upper hung window is an aluminum alloy and plastic steel window that appeared later. It is a new form developed on the basis of casement windows. It can be opened in two ways, either horizontally or from the top. When the casement window is closed, pull the upper part of the window inward to open a gap of about ten centimeters, that is, the window can be opened a little from above, and the open part is suspended in the air, connected and fixed with the window frame through hinges, etc., so it is called top hung type. Its advantage is that it can not only ventilate, but also ensure safety. Because of the hinge, the window can only open a 10 cm seam, which can not be reached from the outside. It is especially suitable for use when no one is at home. This function is not only limited to the casement windows, but also the sliding windows can be opened by hanging up.

Valgus window
That is, the lower hanging window is an aluminum alloy and plastic steel window that appeared later. It can be pushed away from below. When the casement window is closed, push the lower part of the window outward to open a gap of about ten centimeters, that is, the window can be opened a little from below, and the open part hangs down in the air, and is connected and fixed with the window frame through hinges, so it is called down hung type.

Side hung door
Side hung door refers to a door whose hinges are installed on the side of the door and open inwards or outwards. Side hung door has single side hung door and double side hung door: single side hung door refers to only one door panel, while double side hung door has two door panels. The side hung door is divided into one-way opening and two-way opening. One way opening means that the door can only be opened in one direction (can only be pushed in or pulled out). Two way opening means that the door leaf can be opened in two directions (such as spring door). The side hung door is divided relative to other opening methods, because the door has movable opening, up turning, roller shutter lifting, vertical lifting, rotary and so on.

Sliding door
Sliding doors originated in China and spread to Korea and Japan through Chinese culture. Literally speaking: push and pull the door; In terms of materials, there are wood, metal, organic and inorganic materials; From the use point of view, it is used for bookcase, wall cabinet, bedroom, living room and exhibition hall. Sliding doors originated in China and spread to Korea and Japan through Chinese culture. The specific time can not be verified, but we can see scattered sliding doors in some ancient Chinese paintings, such as landscape paintings in the Song Dynasty. The original sliding door is only used for the sliding door of the bedroom or locker, but with the development of technology and the diversification of decoration methods, the function and scope of use of the sliding door are expanding from the traditional panel surface, to glass, fabric, rattan, aluminum alloy profiles, from sliding doors, folding doors to partition doors. In this case, the use of sliding doors began to become diverse and rich. In addition to the most common partition doors, sliding doors are widely used in bookcases, wall cabinets, living rooms, exhibition halls, sliding doors, etc.