A vertical assembly type flue for a residential kitchen
By installing spring clips and fireproof check valves in the flue, the problems of flammability and poor durability of sealant are solved, achieving longer sealing performance and safety while reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WANJU GUFEN
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-21
AI Technical Summary
The sealant used in existing flue gas ducts is flammable, has poor durability, and poses safety hazards when in contact with high-temperature fumes and flames.
Spring clips are installed between the vertical folded edges of metal components and the exterior wall of the building, as well as between the horizontal folded edges of adjacent metal components above and below, to prevent the spread of high-temperature oil fumes to the sealant. Fireproof check valves or electrically controlled multi-functional valves are also added to the exhaust duct to prevent the spread of fire.
It effectively avoids the aging of sealant and the risk of fire spread, improves the sealing durability and safety performance of the smoke exhaust duct, and reduces material and labor costs.
Smart Images
Figure CN224532148U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of exhaust duct system technology, and more specifically, relates to a vertical prefabricated exhaust duct for residential kitchens. Background Technology
[0002] In January 2024, the applicant filed a public patent application for a "vertical prefabricated exhaust duct" (application number 202410163106.7). The vertical prefabricated exhaust duct is formed by stacking and assembling multiple metal components with longitudinal openings and surrounding the outside of the smoke inlet on the exterior wall of a building. The side edges of the longitudinal openings are provided with vertical folded edges, and the top and bottom edges of the longitudinal openings are provided with horizontal folded edges. Each vertical folded edge is attached and fixed to the exterior wall surface of the building. The upper and lower adjacent metal components are fixedly connected by the horizontal folded edges. The bottom of the vertical prefabricated exhaust duct is sealed, and the top outlet is provided with a structural wind cap to prevent wind, rain and snow from entering the vertical prefabricated exhaust duct.
[0003] See Figure 1 The image shows a partial sectional view of the vertical folded edge 13 of the existing metal component 10 being fixedly connected to the building exterior wall 20. A sealant 30 is provided between the contact surface of the vertical folded edge 13 and the building exterior wall 20, and it is fixed by bolts 40. This results in the problem that the oil fumes, temperature and flames in the flue directly contact the sealant 30, leading to poor sealing performance after long-term use and the possibility of igniting the sealant.
[0004] Figure 2 The partial cross-sectional view of the horizontal folded edge 14 of the existing adjacent metal components 10 is fixedly connected. It also has the potential problem that the oil fumes, temperature and flames in the flue directly contact the sealant 30, which may ignite the sealant. Utility Model Content
[0005] The purpose of this application is to provide a vertical prefabricated exhaust duct for residential kitchens, which aims to solve the technical problems of flammability and poor durability of the sealant inside the exhaust duct in the prior art.
[0006] To achieve the above objectives, the technical solution adopted in this application embodiment is as follows: A vertically assembled exhaust duct for a residential kitchen is provided, which is assembled from multiple metal components with longitudinal openings and surrounds the outer side of the smoke inlet on the building's exterior wall. The longitudinal opening has a U-shaped, L-shaped, arc-shaped, or irregular cross-section. The side edges of the longitudinal opening have vertical folds, and the top and bottom edges of the longitudinal opening have horizontal folds. The vertical folds are fixed to the building's exterior wall surface, and the two horizontal folds of adjacent metal components are fixedly connected. A sealant is provided between the vertical fold and the building's exterior wall surface, and / or between the two horizontal folds of adjacent metal components. The feature is that a spring-loaded piece is also provided between the vertical fold and the building's exterior wall surface, and / or between the two horizontal folds of adjacent metal components, to prevent the spread of high-temperature fumes to the sealant. The bottom of the vertically assembled exhaust duct is sealed, and the top opening allows smoke to escape. A structural hood is provided at the opening to prevent rainwater from entering the exhaust duct.
[0007] Furthermore, the spring piece is disposed near the inner side of the exhaust duct, and the sealant is disposed near the outer side of the exhaust duct.
[0008] Furthermore, the spring piece is U-shaped, C-shaped, L-shaped, V-shaped, O-shaped, or irregular in shape, or is straight after being tightened by bolts between the vertical folded edge and the two horizontal folded edges of the building exterior wall or adjacent metal components.
[0009] Furthermore, the vertical folded edge is provided with a through hole, and the vertical folded edge is fixed to the building exterior wall by an expansion bolt passing through the through hole, the expansion bolt passing through the spring piece for fixation; and / or, the horizontal folded edges of adjacent metal components are fixed by bolts or rivets, the bolts or rivets passing through the spring piece.
[0010] Furthermore, the spring clip is fixedly connected to the metal component.
[0011] Furthermore, the spring piece can be a metal part or a non-metal part.
[0012] Furthermore, the vertical prefabricated exhaust duct is provided with a flow guide and / or a flow guide transformer on the exhaust side of the smoke inlet located on the exterior wall of the building.
[0013] Furthermore, a fireproof check valve or an electrically controlled multi-functional valve is provided on the air inlet side of the vertical prefabricated smoke exhaust duct located on the exterior wall of the building.
[0014] Furthermore, a metal plate is provided on the exterior wall of the building enclosed by the metal component, and the metal plate is provided with a flue opening corresponding to the smoke inlet on the exterior wall of the building.
[0015] Furthermore, the horizontal folded edges of the upper and lower adjacent metal components are overlapped and wound together; or, the horizontal folded edges of the upper and lower adjacent metal components are welded and fixed.
[0016] The vertical prefabricated exhaust duct for residential kitchens in this application, compared with the prior art, adds spring clips between the vertical folded edge of the metal component and the building's exterior wall, and / or between the two horizontal folded edges of adjacent metal components, to prevent the spread of high-temperature oil fumes to the sealant. Compared with existing exhaust ducts, it has the following advantages:
[0017] First, it avoids the aging of the sealant caused by direct contact between the oil fumes and high temperatures inside the flue, thus making its sealing durability longer.
[0018] Secondly, it avoids the risk of fire spreading due to open flames in the flue directly igniting the sealant during a fire.
[0019] Third, it avoids the adverse effects of temperature changes in the oil fumes inside the flue directly contacting the sealant, thus preventing large changes in thermal expansion and contraction.
[0020] Fourth, it easily solves the increased installation difficulty caused by uneven exterior wall surfaces;
[0021] Fifth, under the condition of achieving the same overall sealing, durability and safety performance of prefabricated smoke exhaust ducts, the material cost and installation labor cost are minimized. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 A partial sectional view showing the fixed connection between the vertical folded edge of a metal component and the exterior wall of a building using existing technology;
[0024] Figure 2 A partial sectional view of the horizontal folded edge fixed connection of adjacent metal components in the prior art;
[0025] Figure 3 This is a longitudinal sectional view of the vertically assembled exhaust duct provided in Embodiment 1 of this application;
[0026] Figure 4 A transverse cross-sectional view of the vertically assembled exhaust duct provided in Embodiment 1 of this application;
[0027] Figure 5 This is a partial sectional view of the horizontal folded edges of adjacent metal components in Embodiment 1 of this application;
[0028] Figure 6 This is a three-dimensional schematic diagram of the metal component provided in Embodiment 1 of this application;
[0029] Figure 7 This is a transverse cross-sectional view of the L-shaped vertical assembled exhaust duct provided in Embodiment 2 of this application;
[0030] Figure 8 for Figure 7 Sectional view of AA;
[0031] Figure 9 This is a transverse cross-sectional view of the U-shaped vertical assembled exhaust duct provided in Embodiment 3 of this application;
[0032] Figure 10 for Figure 9 Sectional view of BB;
[0033] Figure 11 This is a partial sectional view of the vertical folded edge and the building exterior wall 20 fixedly connected in Embodiment 4 of this application.
[0034] The following are the labeling elements in the figure:
[0035] 10-Metal component; 11-Panel; 12-Longitudinal opening; 13-Vertical folded edge; 131-Cantilevered edge; 14-Horizontal folded edge; 141-Through hole; 15-Wrapping; 16-Welding point;
[0036] 20 - Building exterior wall; 21 - Smoke inlet;
[0037] 30 - Sealant; 40 - Bolt; 50 - Spring clip; 60 - Structural vent cap;
[0038] 70 - Flow guide; 80 - Flow guide transformer; 81 - Transformer cover. Detailed Implementation
[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.
[0043] The following description, in conjunction with the accompanying drawings, illustrates the vertical prefabricated exhaust duct for residential kitchens provided in this application.
[0044] Example 1
[0045] Reference Figures 3 to 6 The first embodiment of this application provides a vertically assembled exhaust duct for a residential kitchen, which is assembled from multiple metal components 10 with longitudinal openings 12, and surrounds the outside of the smoke inlet 21 of the building's exterior wall 20. (See also...) Figure 6 The metal component 10 is a three-dimensional part formed by assembling three panels 11. Each panel 11 has a certain length, so the enclosed three-dimensional part has a longitudinal opening 12. In this embodiment, the cross-section of the longitudinal opening 12 is U-shaped. Of course, the cross-section of the longitudinal opening 12 can also be L-shaped, arc-shaped, or irregular.
[0046] Two of the panels 11 of the metal component 10 have vertical flanges 13 at their side edges located at the longitudinal opening 12, while the top and bottom edges of the three panels 11 have horizontal flanges 14. Both the vertical flanges 13 and the horizontal flanges 14 extend outward along the edge of the panel 11 by a certain width. The vertical flanges 13 have through holes 141 (not shown), and the vertical flanges 13 are fixed to the building exterior wall 20 by bolts 40 passing through the through holes 141. The horizontal flanges 14 may also have through holes 141 so that the horizontal flanges 14 of the upper and lower metal components can be fixedly connected by rivets or bolts 40 during installation.
[0047] like Figure 4As shown, when assembling a vertical prefabricated smoke exhaust duct using metal components 10, multiple metal components 10 are stacked longitudinally, and the horizontal folded edges 14 of the upper and lower metal components 10 are fixedly connected to form a whole. The vertical folded edges 13 of each metal component 10 are fixed to the building exterior wall 20 by bolts 40. During installation, the longitudinal opening 12 is directly opposite the smoke inlet 21 on the building exterior wall 20. Since the longitudinal opening 12 is set along the length of the metal component 10, and its length and width are both greater than the smoke inlet 21, it can well enclose the smoke inlet 21 during installation. Therefore, the problems of difficulty in connecting the vertical prefabricated smoke exhaust duct with the smoke inlet 21, construction difficulty, and sealing difficulty will not occur.
[0048] In this embodiment, the cross-section of the vertical folded edge 13 is straight, and a spring clip 50 is provided between the vertical folded edge 13 and the building exterior wall 20, as well as sealant 30. Figure 4 As can be seen, the spring clip 50 is positioned close to the inner side of the exhaust duct, while the sealant 30 is positioned close to the outer side of the exhaust duct. This design allows the spring clip 50 to effectively prevent the spread of high-temperature oil fumes to the sealant 30. Simultaneously, the spring clip 50 can be used to adjust for unevenness in the building's exterior wall 20, thus better controlling the installation quality.
[0049] In this embodiment, the bottom of the vertical prefabricated smoke exhaust duct is sealed (not shown in the figure), while the top is open for smoke discharge. A structural vent cap 60 is provided at the opening to prevent rainwater from entering the duct. This smoke exhaust duct connects to the smoke inlets 21 on each floor of the residential building. Smoke entering from the smoke inlets 21 on each floor enters the vertical prefabricated smoke exhaust duct, flows upwards, and is finally discharged through the structural vent cap 60 at the top. Of course, the structural vent cap 60 can also be an electrically controlled vent cap. Alternatively, a mechanical ventilation system can be installed at the bottom of the vertical prefabricated smoke exhaust duct.
[0050] Reference Figure 4 In this embodiment, the spring piece 50 is C-shaped. Of course, it can also be U-shaped, L-shaped, V-shaped, O-shaped, irregular, or straight after being tightened by the bolts 40 between the vertical folded edge 13 and the two horizontal folded edges 14 of the building exterior wall 20 and the adjacent metal component 10.
[0051] In this embodiment, a through hole 141 can also be provided on the vertical folded edge 13, and the vertical folded edge 13 can be directly fixed to the building exterior wall 20 by bolts 40 passing through the through hole 141. Alternatively, the bolts 40 can be fixed by passing through the spring piece 50, thus simultaneously fixing the spring piece 50 and the vertical folded edge 13 to the building exterior wall 20.
[0052] Reference Figure 5 In this embodiment, the horizontal folded edges 14 of the upper and lower adjacent metal components 10 are fixed by bolts 40 or rivets, and the bolts 40 or rivets pass through the spring piece 50. In this way, the spring piece 50 and the upper and lower horizontal folded edges 14 are fixedly connected at the same time.
[0053] In this embodiment, the spring clip 50 is an independent component, placed between the vertical folded edge 13 and the building exterior wall 20, or fixedly connected between adjacent horizontal folded edges 14 during the assembly of the flue. Alternatively, the spring clip 50 can be directly fixed to the panel 11, the vertical folded edge 13, or the horizontal folded edge 14 during the fabrication of the metal component 10. This also facilitates subsequent assembly.
[0054] In this embodiment, the spring element 50 is a metal part. Metal parts are heat-resistant and non-flammable. Of course, it can also be made of a non-metallic part with heat-resistant and non-flammable properties.
[0055] Furthermore, a fireproof backflow preventer or an electrically controlled multi-functional valve (not shown in the figure) is provided on the air intake side of the smoke inlet 21 located in the vertical prefabricated smoke exhaust duct and on the exterior wall 20 of the building. This can prevent the smoke in the vertical prefabricated exhaust duct from flowing back into the kitchen and can also prevent the spread of fire in the event of a fire.
[0056] Furthermore, a metal plate (not shown in the figure) can also be installed on the building exterior wall 20 enclosed by the metal component 10. The metal plate has a flue opening corresponding to the smoke inlet 21 on the building exterior wall 20. Because the surface of the metal plate is smooth, the frictional resistance is less than that of the building exterior wall 20, making it more suitable as the inner wall of the exhaust duct. Alternatively, in some scenarios, the outer side of the building exterior wall 20 is not suitable as the inner wall of the exhaust duct, and a metal plate can also be added. Accordingly, the metal plate needs to have an air duct opening corresponding to the smoke inlet 21 on the outer side of the building exterior wall 20 to allow airflow.
[0057] In this embodiment, the sealant 30 is directly applied and sandwiched between the vertical folded edge 13 and the building exterior wall 20, as well as between the two horizontal folded edges 14 of the adjacent metal components 10, or injected from the outside to the inside after the metal components 10 are installed.
[0058] Example 2
[0059] Reference Figure 7 , Figure 8 In the second embodiment of this application, the metal component 10 is installed at the right-angle corner of the outer wall 20 of the building. The metal component 10 is formed by combining two panels 11. The cross-section of the longitudinal opening 12 of the metal component 10 is L-shaped. A guide 70 is provided on the outside of the smoke inlet 21 to make the exhaust of the vertical assembled exhaust duct smoother.
[0060] In this embodiment, the spring piece 50 is L-shaped, and the vertical folded edge 13 is bent to form a raised edge 131, which increases the bending resistance of the vertical folded edge 13. Of course, the horizontal folded edge 14 can also be bent to form a raised edge to increase the bending resistance.
[0061] Example 3
[0062] Reference Figure 9 , Figure 10 In Embodiment 3 of this application, the spring piece 50 is U-shaped, and a flow guiding and pressure changing device 80 is provided at the smoke inlet 21. The flow guiding and pressure changing device 80 is a pressure changing cover 81 added outside the flow guiding piece 70, so that a pressure changing effect is generated at the smoke inlet 21 of the vertical assembled smoke exhaust duct, which facilitates smoother smoke exhaust. The horizontal folded edges 14 of the two adjacent metal components 10 are reinforced by overlapping and winding 15 or welding. The rest is the same as in Embodiment 1, and will not be described in detail here.
[0063] Example 4
[0064] Reference Figure 11 In Embodiment 4 of this application, the spring piece 50 is arc-shaped and is welded to the metal component 10 via welding point 16 during factory manufacturing, and is directly fixed to the building exterior wall 20, which is quite convenient. Other aspects are the same as in Embodiment 1, and will not be repeated here.
[0065] In summary, the embodiments of this application employ the aforementioned metal component 10 and vertically assembled exhaust duct, which not only solves the problems of difficulty in accurately connecting the air inlet, difficulty in welding construction, and difficulty in controlling the sealing quality in the prior art; but also solves the problems of flammability and poor durability of sealant, and allows for complete on-site assembly construction, improving work efficiency, saving materials, and saving labor.
[0066] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.
Claims
1. A vertically assembled exhaust duct for a residential kitchen, comprising multiple stacked metal components with longitudinal openings, enclosing the outer side of the smoke inlet on the building's exterior wall, wherein... The longitudinal opening has a U-shaped, L-shaped, arc-shaped, or irregular cross-section. The side edges of the longitudinal opening are provided with vertical folds, and the top and bottom edges of the longitudinal opening are provided with horizontal folds. The vertical folds are fixed to the exterior wall of the building. The two horizontal folds of adjacent metal components are fixedly connected. A sealant is provided between the vertical fold and the exterior wall, and / or between the two horizontal folds of adjacent metal components. The feature is that a spring-loaded piece is also provided between the vertical fold and the exterior wall, and / or between the two horizontal folds of adjacent metal components, to prevent the spread of high-temperature fumes to the sealant. The bottom of the vertical prefabricated exhaust duct is sealed, and the top opening allows smoke to escape. A structural hood is provided at the opening to prevent rainwater from entering the exhaust duct.
2. The vertical prefabricated exhaust duct for residential kitchens as described in claim 1, characterized in that: The spring clip is disposed near the inner side of the exhaust duct, and the sealant is disposed near the outer side of the exhaust duct.
3. The vertical prefabricated exhaust duct for residential kitchens as described in claim 1, characterized in that: The spring clip is in the shape of a U, C, L, V, O, or irregular shape, or it is in the shape of a straight line after being tightened by bolts between the vertical folded edge and the two horizontal folded edges of the building exterior wall or adjacent metal components.
4. The vertical prefabricated exhaust duct for residential kitchens as described in claim 1, characterized in that: The vertical folded edge is provided with a through hole, and the vertical folded edge is fixed to the building exterior wall by an expansion bolt passing through the through hole. The expansion bolt passes through the spring piece for fixation; and / or, the horizontal folded edges of adjacent metal components are fixed by bolts or rivets, and the bolts or rivets pass through the spring piece.
5. The vertical prefabricated exhaust duct for residential kitchens as described in claim 1, characterized in that: The spring clip is fixedly connected to the metal component.
6. The vertical prefabricated exhaust duct for residential kitchens as described in claim 1, characterized in that: The spring clip can be a metal part or a non-metal part.
7. The vertical prefabricated exhaust duct for residential kitchens as described in claim 1, characterized in that: The vertical prefabricated smoke exhaust duct is equipped with a flow guide and / or a flow guide transformer on the exhaust side of the smoke inlet located on the exterior wall of the building.
8. The vertical prefabricated exhaust duct for residential kitchens as described in claim 1, characterized in that: The vertical prefabricated smoke exhaust duct is equipped with a fireproof check valve or an electrically controlled multi-functional valve on the air inlet side of the smoke inlet located on the exterior wall of the building.
9. The vertical prefabricated exhaust duct for residential kitchens as described in claim 1, characterized in that: The building exterior wall enclosed by the metal components is provided with a metal plate, and the metal plate is provided with a flue opening corresponding to the smoke inlet on the building exterior wall.
10. The vertical prefabricated exhaust duct for residential kitchens as described in claim 1, characterized in that: The horizontal folded edges of the upper and lower adjacent metal components are overlapped and wound together; or, the horizontal folded edges of the upper and lower adjacent metal components are welded and fixed.