Anti-backflow door and window

Abstract

The utility model provides an anti-backflow door and window, which relates to the technical field of doors and windows, and comprises a frame body, a first movable window sash and a second movable window sash, and an exhaust structure is arranged on the inner side wall of the top of the frame body; the first movable window sash is arranged in the frame body and is movably connected with the frame body; the second movable window sash is arranged in the frame body and movably connected with the frame body, the second movable window sash and the first movable window sash are arranged in a staggered mode in the horizontal direction, the first movable window sash is arranged at the end, close to the outdoor space, of the frame body, and an exhaust structure is arranged on the outer side wall of the top of the second movable window sash. The anti-backflow door and window can balance indoor and outdoor air pressure and reduce formation of bubbles, so that rainwater is prevented from being ejected into a room, rainwater backflow is effectively prevented, the room is kept dry, building materials such as walls and floors are prevented from being affected with damp and mildewed, the service life of a building is prolonged, and the anti-backflow door and window is more beneficial to physical health of residents.

Description

Technical Field

[0001] The utility model relates to the technical field of doors and windows, and in particular to a backflow prevention door and window. Background Art

[0002] With the rapid development of my country's economy and the advancement of urbanization, the construction of buildings in my country is also increasing. In the design and construction process of buildings, doors and windows, as key elements connecting indoor and outdoor, not only affect the overall appearance of the building, but also undertake multiple functions, such as lighting, ventilation, heat preservation, heat insulation, sound insulation, etc. The quality and performance of doors and windows are directly related to the user experience of the building and the quality of life of residents.

[0003] However, although doors and windows play a vital role in buildings, under extreme weather conditions, especially when the outdoor air pressure is higher than the indoor air pressure, the existing door and window designs are often unable to effectively prevent rainwater from flowing back into the room. When the indoor and outdoor air pressure difference increases, bubbles are easily formed in the poorly sealed areas at the bottom of the sliding doors and windows. These bubbles will continue to expand under the action of the air pressure difference and eventually burst, causing rainwater to be ejected into the room, causing indoor humidity and even causing more serious indoor flooding, which not only affects the normal use of the building, but may also pose a threat to the health and property safety of residents. Utility Model Content

[0004] Based on this, in order to solve the problem that when the pressure difference between indoor and outdoor increases, bubbles are easily formed in the places where the existing doors and windows are poorly sealed, causing rainwater to be ejected into the room, causing indoor humidity and even causing more serious indoor flooding, the purpose of the utility model is to provide an anti-backflow door and window, and its specific technical solution is as follows:

[0005] A backflow prevention door and window comprises a frame, a first movable window sash and a second movable window sash, wherein an exhaust structure is arranged on the inner side wall of the top of the frame; the first movable window sash is arranged in the frame and movably connected to the frame; the second movable window sash is arranged in the frame and movably connected to the frame, the second movable window sash is staggered with the first movable window sash in the horizontal direction, the first movable window sash is arranged at one end of the frame close to the outdoors, and an exhaust structure is arranged on the outer side wall of the top of the second movable window sash.

[0006] Furthermore, the frame body includes a first outer frame, a guide frame, a second outer frame and a bottom frame, and the first outer frame, the guide frame, the second outer frame and the bottom frame are enclosed and connected, and the first movable window sash and the second movable window sash can slide on the guide frame and the bottom frame respectively, and the first outer frame is provided with a first groove for clamping the first movable window sash, and the exhaust structure is arranged on one end of the top of the first outer frame close to the first groove, and the exhaust structure is arranged between the first movable window sash and the second movable window sash.

[0007] Furthermore, the second movable window sash includes a first side frame and a second side frame, and the upper and lower ends of the first side frame and the second side frame are respectively fixedly connected with a first upper window frame and a first lower window frame, the first upper window frame can slide on the guide frame, and the first lower window frame can slide on the bottom frame, the first side frame is arranged on a side close to the first outer frame, and an exhaust structure is arranged on the outer side wall of the top of the first side frame.

[0008] Furthermore, a first reinforcement cavity is provided in the first side frame.

[0009] Furthermore, a second reinforcement cavity is provided in the second side frame.

[0010] Furthermore, the first movable window sash includes a third side frame and a fourth side frame, and the upper and lower ends of the third side frame and the fourth side frame are respectively fixedly connected with a second upper window frame and a second lower window frame, the second upper window frame can slide on the guide frame, and the second lower window frame can slide on the bottom frame, and the third side frame is arranged on a side close to the first outer frame, and the first outer frame is provided with the exhaust structure on an end close to the third side frame.

[0011] Furthermore, the exhaust structure includes a cover body and an exhaust switch, the exhaust switch is movably connected to the cover body, the cover body is provided with an exhaust port, the exhaust switch can slide up and down on the exhaust port, and the cover body is provided on the inner side wall of the top of the frame body.

[0012] Furthermore, the exhaust structure comprises an independent exhaust nozzle and a cover, the independent exhaust nozzle is detachably connected to the cover, and the independent exhaust nozzle is arranged on the inner side wall of the top of the frame.

[0013] Furthermore, the exhaust structure comprises a normally open exhaust nozzle, and the normally open exhaust nozzle is arranged on the inner side wall of the top of the frame.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the anti-backflow doors and windows of the utility model can form a tighter seal by staggering the second movable window sash with the first movable window sash in the horizontal direction, so that the overlapping part between the second movable window sash and the first movable window sash can reduce the possibility of air and rainwater penetrating into the room through the gaps in the doors and windows; by setting the exhaust structure at the top of the frame and the second movable window sash, the two exhaust structures work together to transfer the position with poor air tightness from the bottom of the door and window to the top of the door and window. Even if the outdoor air pressure is greater than the indoor air pressure, the exhaust structure allows air to pass through, thereby balancing the indoor and outdoor air pressures and reducing the formation of bubbles, thereby preventing rainwater from being ejected into the room, effectively preventing rainwater from backflowing, keeping the room dry, and preventing building materials such as walls and floors from getting damp and moldy, extending the service life of the building, and being more beneficial to the health of residents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention may be further understood from the following description in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same figure numerals designate corresponding parts.

[0016] Figure 1 It is a structural schematic diagram of the anti-backflow door and window according to an embodiment of the utility model;

[0017] Figure 2 It is a horizontal cross-sectional view of the anti-backflow door and window described in one embodiment of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the exhaust structure described in one embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the exhaust switch of the exhaust structure according to one embodiment of the utility model in an open state;

[0020] Figure 5 It is a structural schematic diagram of an exhaust structure according to another embodiment of the utility model;

[0021] Figure 6 This is a schematic diagram of the exhaust structure according to another embodiment of the utility model in an open cover state;

[0022] Figure 7 It is a structural schematic diagram of an exhaust structure described in yet another embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1. Frame; 11. First outer frame; 111. First groove; 12. Guide frame; 13. Second outer frame; 131. Second groove; 14. Bottom frame; 2. Exhaust structure; 21. Cover; 211. Exhaust port; 22. Exhaust switch; 23. Independent exhaust nozzle; 24. Cover; 25. Normally open exhaust nozzle; 3. First movable window sash; 31. Third side frame; 311. Third reinforced cavity; 32. Fourth side frame; 321. Fourth reinforced cavity; 4. Second movable window sash; 41. First side frame; 411. First reinforced cavity; 42. Second side frame; 421. Second reinforced cavity. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described here are only used to explain the utility model and do not limit the protection scope of the utility model.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0029] like Figure 1-2As shown, an anti-backflow door and window in one embodiment of the utility model comprises a frame, a first movable window sash 3 and a second movable window sash 4, an exhaust structure 2 is arranged on the inner side wall of the top of the frame; the first movable window sash 3 is arranged in the frame and is movably connected to the frame; the second movable window sash 4 is arranged in the frame and is movably connected to the frame, the second movable window sash 4 and the first movable window sash 3 are staggered in the horizontal direction, the overlapping part between the second movable window sash 4 and the first movable window sash 3 can form a tighter seal, reducing the possibility of air and rainwater penetrating into the room through the gaps of the doors and windows, and the first movable window sash 3 is arranged in the frame near the room At the outer end, an exhaust structure 2 is arranged on the outer side wall of the top of the second movable window sash 4. By arranging the exhaust structure 2 at the top of the frame and the second movable window sash 4, the two exhaust structures 2 cooperate with each other to transfer the position with poor air tightness from the bottom of the door and window to the top of the door and window. Even if the outdoor air pressure is greater than the indoor air pressure, the exhaust structure 2 allows air to pass through, thereby balancing the indoor and outdoor air pressures and reducing the formation of bubbles, thereby preventing rainwater from being ejected into the room, effectively preventing rainwater from backflowing, keeping the room dry, and preventing building materials such as walls and floors from getting damp and moldy, thereby extending the service life of the building and being more beneficial to the health of residents.

[0030] As a preferred embodiment of the utility model, it may also have the following additional technical features: the frame body includes a first outer frame 111, a guide frame 12, a second outer frame 131 and a bottom frame 141, and the first outer frame 111, the guide frame 12, the second outer frame 131 and the bottom frame 141 are enclosed and connected to form a stable supporting structure for supporting and fixing the first movable window sash 3 and the second movable window sash 4, and the first movable window sash 3 and the second movable window sash 4 can slide on the guide frame 12 and the bottom frame 141 respectively, so as to facilitate opening and closing, and the first outer frame 111 is provided with a first groove 111 for clamping the first movable window sash 3, and the second outer frame 131 is provided with a second groove 131 for clamping the second movable window sash 4, and the exhaust structure 2 is arranged on the top of the first outer frame 111 at one end close to the first groove 111, and the exhaust structure 2 is arranged between the first movable window sash 3 and the second movable window sash 4. This arrangement still has space for air circulation when the doors and windows are closed, thereby balancing the indoor and outdoor air pressures and preventing rainwater backflow.

[0031] As a preferred embodiment of the utility model, it may also have the following additional technical features: the second movable window sash 4 includes a first side frame 41 and a second side frame 42, and glass is embedded between the inner sides of the first side frame 41 and the second side frame 42. The upper and lower ends of the first side frame 41 and the second side frame 42 are respectively fixedly connected with the first upper window frame and the first lower window frame to form a stable window sash frame 1. The first upper window frame can slide on the guide frame 12, and the first lower window frame can slide on the bottom frame 141. The first side frame 41 is arranged on a side close to the first outer frame 111, and an exhaust structure 2 is arranged on the outer side wall of the top of the first side frame 41. When the second movable window sash 4 is closed, external air can enter the room through the exhaust structure 2 on the first side frame 41, thereby maintaining indoor and outdoor air circulation, helping to balance the indoor and outdoor air pressure and reduce the occurrence of backflow.

[0032] As a preferred embodiment of the utility model, it may also have the following additional technical features: a first reinforced cavity 411 is arranged in the first side frame 41, and the first reinforced cavity 411 can effectively increase the internal support of the first side frame 41, improve the structural strength and rigidity of the first side frame 41, reduce the weight of the first side frame 41 while maintaining the structural strength, and at the same time, reduce the path of heat transfer through the first side frame 41 to a certain extent, thereby reducing the loss of indoor heat.

[0033] As a preferred embodiment of the utility model, it may also have the following additional technical features: a second reinforced cavity 421 is provided in the second side frame 42, and the second reinforced cavity 421 can effectively increase the internal support of the second side frame 42, improve the structural strength and rigidity of the second side frame 42, reduce the weight of the second side frame 42 while maintaining the structural strength, and at the same time, reduce the path of heat transfer through the second side frame 42 to a certain extent, thereby reducing indoor heat loss.

[0034] Specifically, in the present embodiment, the first movable window sash 3 comprises a third side frame 31 and a fourth side frame 32, glass is embeddedly installed between the inner sides of the third side frame 31 and the fourth side frame 32, the upper and lower ends of the third side frame 31 and the fourth side frame 32 are respectively fixedly connected with the second upper window frame and the second lower window frame, so as to form a stable window sash frame 1, the third side frame 31 is arranged on a side close to the first outer frame 111, and the first outer frame 111 is provided with an exhaust structure 2 on an end close to the third side frame 31, when the first movable window sash 3 is closed, external air can enter the room through the exhaust structure 2 on the first outer frame 111, so as to maintain indoor and outdoor air circulation, help balance the indoor and outdoor air pressure, and reduce the occurrence of backflow. Specifically, the third side frame 31 A third reinforced cavity 311 is arranged inside, and the third reinforced cavity 311 can effectively increase the internal support of the third side frame 31, improve the structural strength and rigidity of the third side frame 31, reduce the weight of the third side frame 31 while maintaining the structural strength, and at the same time, reduce the path of heat transfer through the third side frame 31 to a certain extent, thereby reducing indoor heat loss. A fourth reinforced cavity 321 is arranged in the fourth side frame, and the fourth reinforced cavity 321 can effectively increase the internal support of the fourth side frame 32, improve the structural strength and rigidity of the fourth side frame 32, reduce the weight of the fourth side frame 32 while maintaining the structural strength, and at the same time, reduce the path of heat transfer through the fourth side frame 32 to a certain extent, thereby reducing indoor heat loss.

[0035] Please refer to Figure 3-Figure 4 As a preferred embodiment of the utility model, it may also have the following additional technical features: the exhaust structure 2 includes a cover body 21 and an exhaust switch 22, the exhaust switch 22 is movably connected to the cover body 21, an exhaust port 211 is provided on the cover body 21, the exhaust switch 22 can slide up and down on the exhaust port 211, and the cover body 21 is provided on the inner side wall of the top of the frame. Of course, in other embodiments, the exhaust switch 22 can be a plug-in type, a rotary adjustment type or a straight row type. In addition, in other embodiments, the exhaust structure 2 can be designed differently according to different needs. Please refer to Figure 5-Figure 6 Specifically, the exhaust structure 2 includes an independent exhaust nozzle 23 and a cover 24, the independent exhaust nozzle 23 and the cover 24 are detachably connected, and the independent exhaust nozzle 23 is arranged on the inner side wall of the top of the frame; in other embodiments, please refer to Figure 7 The exhaust structure 2 can also be designed to include a normally open exhaust nozzle 25, which is arranged on the inner side wall of the top of the frame. The above-mentioned exhaust structure 2 can be used alone or in combination according to actual needs.

[0036] As shown in the figure, specifically, in this embodiment, judging whether the anti-backflow doors and windows of this embodiment need to open the exhaust structure 2 for exhaust is divided into three stages: (△P is the indoor and outdoor pressure difference) the first stage (△P is 0-200Pa), at this stage, since the indoor and outdoor pressure difference is relatively small, the water level is not high, and the water remaining on the inside of the doors and windows is easily blown into the room by the outdoor air pressure. The exhaust structure 2 should be opened to allow indoor and outdoor air circulation to balance the pressure difference and prevent the water accumulated at the bottom of the doors and windows from being blown over the water retaining edge; the second stage (△P is 200-350Pa), at this time, the accumulated water has enough water level height, if the air pressure is relatively stable, the water pressure is equal to the indoor air pressure. and is sufficient to resist the outdoor air pressure, the exhaust structure 2 can be closed to maintain the sealing of doors and windows and prevent external wind and rain from entering the room; in the third stage (△P is >350Pa), when the air pressure difference exceeds 350Pa, the water entering the room and the water discharged from the outside reach a state of equilibrium. At this time, if the bottom of the doors and windows are sealed too tightly, bubbling may occur, that is, water cannot be discharged through the gaps at the bottom of the doors and windows under the action of air pressure, thus forming bubbles, and the bursting of the bubbles causes rainwater to be ejected into the room. In order to prevent this from happening, the exhaust structure 2 should be opened appropriately to allow some air to enter the room, destroy this balance, and allow the water to be discharged smoothly.

[0037] The anti-backflow doors and windows of this embodiment have a reasonable structural design and are easy to use. This structure can also be used for other equipment with similar usage requirements. In this embodiment, the anti-backflow doors and windows can balance the indoor and outdoor air pressure and reduce the formation of bubbles, thereby preventing rainwater from being ejected into the room, effectively preventing rainwater from backflowing, keeping the room dry, and preventing walls, floors and other building materials from getting damp and moldy, thereby extending the service life of the building and being more beneficial to the health of residents.

[0038] In the description of the above embodiments, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, "several" and "multiple" mean more than one, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" and "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction between the combinations of these technical features, they should be considered to be within the scope recorded in this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A backflow prevention door and window, characterized in that: include: A frame (1), wherein an exhaust structure (2) is arranged on the inner side wall of the top of the frame (1); A first movable window sash (3), the first movable window sash (3) being arranged in the frame (1) and movably connected to the frame (1); and A second movable window sash (4), the second movable window sash (4) is arranged in the frame (1) and is movably connected to the frame (1), the second movable window sash (4) and the first movable window sash (3) are arranged offset in the horizontal direction, the first movable window sash (3) is arranged at one end of the frame (1) close to the outdoors, and an exhaust structure (2) is arranged on the outer side wall of the top of the second movable window sash (4).

2. The anti-backflow door and window according to claim 1, characterized in that: The frame body (1) comprises a first outer frame (11), a guide frame (12), a second outer frame (13) and a bottom frame (14); the first outer frame (11), the guide frame (12), the second outer frame (13) and the bottom frame (14) are enclosed and connected; the first movable window sash (3) and the second movable window sash (4) can slide on the guide frame (12) and the bottom frame (14) respectively; the first outer frame (11) is provided with a first groove (111) for clamping the first movable window sash (3); the exhaust structure (2) is arranged on one end of the top of the first outer frame (11) close to the first groove (111); and the exhaust structure (2) is arranged between the first movable window sash (3) and the second movable window sash (4).

3. The anti-backflow door and window according to claim 2, characterized in that: The second movable window sash (4) comprises a first side frame (41) and a second side frame (42); the upper and lower ends of the first side frame (41) and the second side frame (42) are respectively fixedly connected to a first upper window frame and a first lower window frame; the first upper window frame is capable of sliding on the guide frame (12); the first lower window frame is capable of sliding on the bottom frame (14); the first side frame (41) is arranged on a side close to the first outer frame (11); and an exhaust structure (2) is arranged on the outer side wall of the top of the first side frame (41).

4. The anti-backflow door and window according to claim 3, characterized in that: A first reinforcement cavity (411) is provided in the first side frame (41).

5. The anti-backflow door and window according to claim 3, characterized in that: A second reinforcement cavity (421) is provided in the second side frame (42).

6. The anti-backflow door and window according to claim 2, characterized in that: The first movable window sash (3) comprises a third side frame (31) and a fourth side frame (32); the upper and lower ends of the third side frame (31) and the fourth side frame (32) are respectively fixedly connected with a second upper window frame and a second lower window frame; the second upper window frame is capable of sliding on the guide frame (12); the second lower window frame is capable of sliding on the bottom frame (14); the third side frame (31) is arranged on a side close to the first outer frame (11); and the exhaust structure (2) is arranged on an end of the first outer frame (11) close to the third side frame (31).

7. The anti-backflow door and window according to claim 1, characterized in that: The exhaust structure (2) comprises a cover body (21) and an exhaust switch (22); the exhaust switch (22) is movably connected to the cover body (21); an exhaust port (211) is provided on the cover body (21); the exhaust switch (22) can slide up and down on the exhaust port (211); and the cover body (21) is provided on the inner side wall of the top of the frame body (1).

8. The anti-backflow door and window according to claim 1, characterized in that: The exhaust structure (2) comprises an independent exhaust nozzle (23) and a cover (24); the independent exhaust nozzle (23) is detachably connected to the cover (24); and the independent exhaust nozzle (23) is arranged on the inner side wall of the top of the frame (1).

9. The anti-backflow door and window according to claim 1, characterized in that: The exhaust structure (2) comprises a normally open exhaust nozzle (25), and the normally open exhaust nozzle (25) is arranged on the inner side wall of the top of the frame (1).

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