Multi-functional unpowered hood for public flue and constructed smoke exhaust cleaning system

Abstract

This invention discloses a multifunctional non-powered vent cap for public flues and the constructed smoke extraction and cleaning system. The non-powered vent cap includes a pulley head, a variable-angle neck, a waterproof base, a spiral pneumatic mechanism, a rotating spray mechanism, a screw, an upper support, and a lower support. The spiral pneumatic mechanism is located inside the variable-angle neck and is fixedly connected to the screw. The rotating spray mechanism is located inside the pulley head and is fixedly connected to the upper support, and can rotate synchronously with the pulley head. The non-powered vent cap of this invention, by setting up a spiral pneumatic mechanism, can guide upward flue gas to swirl and generate wind power, thereby providing supplementary power when there is no natural wind or the natural wind is weak, driving the pulley head to rotate from the inside, improving the smoke extraction effect. By setting up a rotating spray mechanism, it is used to perform rotating spraying with the assistance of natural wind or the spiral pneumatic mechanism to wash the walls of the public flue and the pulley head, achieving flue scale removal and pulley head self-cleaning.

Description

Technical Field

[0001] This invention relates to the field of public flue smoke extraction equipment, specifically to a multifunctional non-powered vent cap for public flues and the smoke extraction and cleaning system constructed therefrom. Background Technology

[0002] With my country's rapid economic development, buildings are getting taller and taller. Modern residential buildings are generally high-rises equipped with shared ventilation ducts. Each household connects its range hood's exhaust pipe to this shared duct, allowing fumes to be expelled outdoors. The fume extraction process relies primarily on the mechanical force of the range hood to push the fumes upwards. In lower-rise buildings, fumes encounter significant frictional resistance during extraction, affecting efficiency. Furthermore, scale buildup on the duct walls due to prolonged uncleanliness also hinders fume extraction. Current solutions typically involve adding auxiliary fans to the top of the shared duct to create negative pressure and guide the fumes outwards. However, these auxiliary fans require electricity, resulting in high installation costs, and increase power consumption and resource waste during exhaust. The emergence of non-powered fan caps offers a preferred solution. A non-powered ventilation cap utilizes the natural wind speed to drive the turbine rotation of a fan and the principle of indoor and outdoor air convection. It accelerates and transforms any parallel airflow into a vertical upward airflow, thus improving indoor ventilation. It has advantages such as easy installation, no need for additional power supply, and long-term operation, making it a preferred choice as a negative pressure source. However, in the absence of natural wind, the non-powered ventilation cap cannot rotate on its own, resulting in poor smoke extraction; moreover, the problem of scale buildup in the flue remains unresolved. Summary of the Invention

[0003] To overcome the aforementioned problems in the prior art, this application provides a multifunctional, non-powered vent cap for public flues. This multifunctional, non-powered vent cap for public flues utilizes a spiral pneumatic mechanism to guide upward flue gas into a vortex, generating wind power. This provides supplementary power when there is no natural wind or weak natural wind, internally driving the pulley head to rotate and improving smoke extraction efficiency. Furthermore, by incorporating a rotating spray mechanism, it can perform rotating spraying with the assistance of natural wind or the spiral pneumatic mechanism, washing the walls of the public flue and pulley head, achieving flue scale removal and pulley head self-cleaning. Correspondingly, this application also provides a public flue smoke extraction and cleaning system constructed using the aforementioned multifunctional, non-powered vent cap for public flues.

[0004] For non-powered windproof caps, the technical solution of this application is as follows:

[0005] A multi-functional, non-powered vent cap for public flues includes a pulley head, a variable-angle neck, and a waterproof base; the waterproof base is fixedly connected to the variable-angle neck; the pulley head has a screw and an upper bracket inside; the edge of the upper bracket is connected to the inner wall of the pulley head; the variable-angle neck has a lower bracket inside, and the edge of the lower bracket is connected to the inner wall of the variable-angle neck; the upper end of the screw is rotatably connected to the top of the pulley head, and the lower end passes through the through holes in the middle of the upper and lower brackets in sequence; it also includes a spiral pneumatic mechanism and a rotating spray mechanism; the spiral pneumatic mechanism is located in the variable-angle neck... The interior of the angled tube neck includes a rotating shaft and helical blades on the outer surface of the rotating shaft; the rotating shaft is fixedly connected to the lower end of the screw; the rotary spraying mechanism is located inside the pulley head and can rotate synchronously with the pulley head, and includes a sleeve and a set of spray plates evenly distributed around the outside of the sleeve; the sleeve is fitted over the outside of the screw and fixed to the upper bracket; the surface of the spray plates is provided with multiple spray holes; the interiors of the spray plates and the sleeve are provided with interconnected water supply cavities; the rotary spraying mechanism is used to spray cleaning water to flush the walls of the pulley head and the common flue.

[0006] Compared with existing technologies, the multifunctional non-powered wind cap for public flues in this application, through the setting of a spiral pneumatic mechanism, can provide supplementary power when there is no natural wind or the natural wind is weak, driving the pulley head to rotate and improving the smoke exhaust effect. By setting a rotating spray mechanism, it can wash the walls of the public flue and the pulley head, achieving smoke exhaust cleaning and pulley head self-cleaning. Specifically, the spiral pneumatic mechanism includes spiral blades, which can guide the smoke to rise spirally along the spiral blades during the smoke exhaust process, causing the smoke to swirl and generate wind power, driving the pulley head to rotate from the inside. This allows the pulley head to rotate automatically even when there is no natural wind or the natural wind is weak, resulting in good smoke exhaust effect. Furthermore, the smoke passing through the spiral blades... The rotating mechanism starts rotating immediately, allowing the flue gas to change from radial to circumferential flow in advance, facilitating better exhaust from the pulley head. When cleaning of scale buildup in the flue and the inner wall of the pulley head is required, a matching water supply tank can be used to supply water to the rotating spray mechanism. With the assistance of natural wind or a spiral pneumatic mechanism, the rotating spray mechanism rotates synchronously with the pulley head and sprays clean water to wash the walls of the pulley head and the common flue, achieving scale removal and self-cleaning of the pulley head. In addition, the rotating spray mechanism, with the above-mentioned structure, is easy to manufacture and assemble, and the evenly distributed spray plates ensure that the clean water is sprayed evenly, facilitating comprehensive cleaning of the pulley head and the common flue.

[0007] As an optimization, in the aforementioned multi-functional non-powered vent cap for public flues, the relationship between the height H1 of the spiral pneumatic mechanism, the height H2 of the variable-angle neck, and the height H3 of the waterproof base satisfies H1 > H2 + H3. Therefore, after the non-powered vent cap is installed on the public flue, the lower end of the spiral pneumatic mechanism extends into the interior of the public flue, causing the flue gas to begin swirling within the flue. The longer swirling distance allows for better driving of the pulley head, further optimizing the smoke extraction effect.

[0008] Furthermore, the ratio of the diameter D1 of the helical blade to the diameter D2 of the variable-angle neck is D1:D2 = 1 / 2 to 2 / 3, and the ratio of the pitch L of the helical blade to the diameter D1 is L:D1 = 1 / 2 to 2 / 3. In this case, the pitch and diameter of the helical blade meet the requirements for sufficient swirl of the flue gas and do not obstruct the exhaust of the flue gas.

[0009] As an optimization, in the aforementioned multifunctional non-powered wind cap for public flues, the pulley head includes a cap top, a bottom ring, and a set of fan blades closely arranged between the cap top and the bottom ring; both the cap top and the fan blades are arc-shaped; the two ends of the fan blades are respectively fixedly connected to the cap top and the bottom ring by rivets. The pulley head with the above-described structure is easy to manufacture and assemble, and the arc-shaped structure of the fan blades and cap top effectively prevents rainwater from accumulating on the surface of the pulley head. Furthermore, a bearing is provided in the middle of the inner wall of the cap top, and the upper end of the screw is inserted into the bearing. This reduces the coefficient of friction during the rotation of the pulley head, ensuring its rotational accuracy; moreover, the bearing is convenient to use and maintain, and easy to replace. Furthermore, the upper bracket is fixedly connected to the inner wall of the bottom ring by rivets; the lower bracket is fixedly connected to the inner wall of the variable angle tube neck by rivets. In this case, the structure is simple and the connection is highly secure.

[0010] For the smoke extraction and cleaning system, the technical solution of this application is as follows:

[0011] A public flue smoke exhaust cleaning system includes the aforementioned multi-functional non-powered vent cap and water supply tank for public flues of this application; the water supply tank is connected to a rotating spray mechanism via a water supply pipe; and a solenoid valve is provided on the water supply pipe.

[0012] Compared with existing technologies, the smoke exhaust cleaning system of this application allows for the setting of a periodic cleaning command on the solenoid valve (the periodic cleaning time can be selected from the time people cook). This causes the solenoid valve to open periodically, supplying water to the rotary spray mechanism from the water tank. Then, with the assistance of natural wind or a spiral pneumatic mechanism, the rotary spray mechanism rotates with the pulley head, performing a rotary spray to wash the pulley head and the walls of the common flue. This automates the cleaning of scale in the flue and the self-cleaning of the pulley head, making operation more convenient and practical.

[0013] As an optimization, the aforementioned public flue exhaust cleaning system includes a temperature sensor on the solenoid valve. This allows the sensor to monitor the ambient temperature in real time. When the ambient temperature exceeds a set value (excessively high ambient temperatures inhibit natural wind formation and hinder flue gas exhaust), the solenoid valve is activated, supplying water from the water tank to the rotating spray mechanism. This spraying action lowers the temperature around the pulley head, inducing natural wind formation and further improving the exhaust efficiency of the public flue.

[0014] As an optimization, in the aforementioned public flue smoke exhaust cleaning system, the water supply pipe includes a first water supply pipe mounted on a pipe sleeve and a second water supply pipe mounted on a water supply tank; the first water supply pipe and the second water supply pipe are connected by a rotary joint. This design facilitates construction and occupies a smaller volume.

[0015] As an optimization, in the aforementioned public flue smoke exhaust cleaning system, the liquid level in the water supply tank is higher than the top of the spray plate of the rotating spray mechanism. Therefore, water can be supplied to the spray plate solely based on the water level difference between the water supply tank and the spray plate, eliminating the need for external power for automatic water supply and reducing overall manufacturing and maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the non-powered wind cap in this application;

[0017] Figure 2 yes Figure 1 Front view of the non-powered wind cap;

[0018] Figure 3 yes Figure 2 A sectional view along line AA of the non-powered wind cap;

[0019] Figure 4 This is a schematic diagram of the pulley head in this application;

[0020] Figure 5 This is a schematic diagram of the internal structure of the pulley head in this application;

[0021] Figure 6 This is an assembly diagram of the variable-angle pipe neck and waterproof base in this application;

[0022] Figure 7 This is a schematic diagram of the helical pneumatic mechanism in this application;

[0023] Figure 8 This is a schematic diagram of the rotating spray mechanism in this application;

[0024] Figure 9 This is a schematic diagram of the smoke extraction and cleaning system for public smoke ducts in this application;

[0025] Figure 10 This is an assembly diagram of the rotary spray mechanism and water supply tank in this application;

[0026] Figure 11 This is a schematic diagram of the non-powered wind cap installed on a public flue according to this application;

[0027] Figure 12 This is a schematic diagram showing the flow direction of flue gas as it passes through the spiral blades.

[0028] Figure 13 This is a schematic diagram showing the flow direction of cleaning water when the rotary spraying mechanism rotates and sprays.

[0029] The markings in the attached diagram are as follows: 1-Pulley head, 101-Cap top, 102-Bottom ring, 103-Fan blade; 2-Variable angle pipe neck; 3-Waterproof base; 4-Screw pneumatic mechanism, 401-Shaft, 402-Screw blade; 5-Rotating spray mechanism, 501-Pipe sleeve, 502-Spray plate, 5021-Spray hole; 6-Screw; 7-Upper bracket; 8-Lower bracket; 9-Water supply pipe, 901-First water supply pipe, 902-Second water supply pipe, 903-Rotary joint; 10-Water supply tank; 11-Solenoid valve; 12-Common flue. Detailed Implementation

[0030] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application. Example

[0031] See Figures 1 to 8 The multi-functional non-powered vent cap for public flues of this application includes a pulley head 1, a variable angle tube neck 2, and a waterproof base 3 (the waterproof base 3 has mounting holes for fixing the non-powered vent cap to the top of the public flue; see details after installation). Figure 11The system includes a spiral pneumatic mechanism 4 and a rotating spray mechanism 5; the waterproof base 3 is fixedly connected to the variable angle tube neck 2 via a connector; the pulley head 1 is internally provided with a screw 6 and an upper bracket 7; the edge of the upper bracket 7 is connected to the inner wall of the pulley head 1; the variable angle tube neck 2 is internally provided with a lower bracket 8, the edge of the lower bracket 8 is connected to the inner wall of the variable angle tube neck 2; the spiral pneumatic mechanism 4 is located inside the variable angle tube neck 2, and includes a rotating shaft 401 and a spiral blade 402 located on the outer surface of the rotating shaft 401; the upper end of the screw 6 is rotatably connected to the top of the pulley head 1, and the lower end passes through the through hole in the middle of the upper bracket 7 and the lower bracket 8 in sequence, and is connected to the rotating shaft 401 (in this embodiment, the outer surface of the lower end of the screw 6 is provided with an external thread, and the inside of the rotating shaft 401 is provided with an internal thread; during installation...). The rotating shaft 401 is fitted onto the outside of the screw 6 and tightened, thereby fixing the rotating shaft 401, screw 6, and lower bracket 8 together. The rotating spray mechanism 5 is located inside the pulley head 1 and can rotate synchronously with the pulley head 1. It includes a sleeve 501 and a set of spray plates 502 evenly distributed around the outside of the sleeve 501. The sleeve 501 is fitted onto the outside of the screw 6 and fixed to the upper bracket 7 (in this embodiment, the sleeve 501 and the upper bracket 6 are fixed by welding). The surface of the spray plate 502 is evenly provided with multiple spray holes 5021 around the circumference. The spray plate 502 and the sleeve 501 are provided with interconnected water supply cavities (the sleeve 501 is provided with a water inlet hole). The rotating spray mechanism 5 is used to spray cleaning water to rinse the walls of the pulley head 1 and the common flue.

[0032] See Figure 12 During the exhaust process, the flue gas will rise spirally along the spiral blade 402, that is, the flue gas will start to swirl when it passes through the spiral blade 402, changing from radial flow to circumferential flow.

[0033] In this embodiment, the relationship between the height H1 of the spiral pneumatic mechanism 4, the height H2 of the variable angle neck 2, and the height H3 of the waterproof base 3 satisfies H1>H2+H3. Therefore, after the non-powered wind cap is installed on the common flue, the lower end of the spiral pneumatic mechanism 5 extends into the common flue, causing the flue gas to begin swirling within the flue. The longer the swirling distance, the greater the wind force generated, thus better driving the pulley head 1 to rotate, further optimizing the smoke extraction effect.

[0034] In this embodiment, the ratio of the diameter D1 of the helical blade 402 to the diameter D2 of the variable-angle neck 2 is D1:D2=3 / 5, and the ratio of the pitch L of the helical blade 402 to the diameter D1 is L:D1=3 / 5. At this time, the pitch and diameter of the helical blade 402 meet the requirements for sufficient swirl of the flue gas and do not obstruct the exhaust of the flue gas.

[0035] In this embodiment, the pulley head 1 includes a cap 101, a bottom ring 102, and a set of fan blades 103 closely arranged between the cap 101 and the bottom ring 102; both the cap 101 and the fan blades 103 are arc-shaped; the two ends of the fan blades 103 are fixedly connected to the cap 101 and the bottom ring 102 respectively by rivets. The pulley head 1, with the above-described structure, is easy to manufacture and assemble, and the arc-shaped structure of the fan blades 103 and the cap 101 effectively prevents rainwater from accumulating on the surface of the pulley head 1. Furthermore, a bearing is provided in the middle of the inner wall of the cap 101, and the upper end of the screw 6 is inserted into the bearing. This reduces the coefficient of friction during the rotation of the pulley head 1, ensuring its rotational accuracy; moreover, the bearing is easy to use, maintain, and replace. Furthermore, the upper bracket 7 is fixedly connected to the inner wall of the bottom ring 102 by rivets; the lower bracket 8 is fixedly connected to the inner wall of the variable angle tube neck 2 by rivets. At this point, the structure is simple and the connection is very strong.

[0036] As a specific application of the multi-functional non-powered vent cap for public flues in the above embodiments: see [link to relevant documentation] Figure 9 and Figure 10 A public flue exhaust cleaning system includes the aforementioned multi-functional non-powered wind cap and water supply tank 10 for public flues of this application; the water supply tank 10 is connected to the rotating spray mechanism 5 via a water supply pipe 9; a solenoid valve 11 is provided on the water supply pipe 9; a temperature sensor is provided on the solenoid valve 11; both the solenoid valve 11 and the temperature sensor are electrically connected to a controller (the controller can be powered by solar energy).

[0037] In this embodiment, the water supply pipe 9 includes a first water supply pipe 901 disposed on the pipe sleeve 501 and a second water supply pipe 902 disposed on the water supply tank 10; the first water supply pipe 901 and the second water supply pipe 902 are connected by a rotary joint 903; the first water supply pipe 901 and the rotary joint 903 are located inside the pulley head 1, and the second water supply pipe 902 passes through a through hole on the variable angle pipe neck 2 (the through hole is located on the surface of the variable angle pipe neck 2) and is connected to the rotary joint 903. This design facilitates construction and occupies a small volume.

[0038] In this embodiment, the liquid level in the water supply tank 10 is higher than the top of the spray plate 502 of the rotating spray mechanism. Therefore, water can be supplied to the spray plate 502 simply by relying on the water level difference between the water supply tank 10 and the spray plate 502, without requiring external power to achieve automatic water supply, thus reducing overall manufacturing and maintenance costs.

[0039] The control method for the public flue smoke exhaust cleaning system in the above embodiments is as follows:

[0040] First, set the regular cleaning time in the controller (e.g., 17:00 to 19:00 in the evening) and set the maximum ambient temperature (e.g., 33°C).

[0041] When the set cleaning time is reached, the solenoid valve 11 opens, and the cleaning water in the water supply tank 10 flows through the water supply pipe 9 to the rotary spray mechanism 5. Assisted by natural wind or a spiral pneumatic mechanism 4, the rotary spray mechanism 5 rotates with the pulley head 1, and the cleaning water inside is sprayed out from the spray holes 5021, washing the pulley head 1 and the walls of the common flue (see...). Figure 13 );

[0042] The temperature sensor inside the solenoid valve 11 detects the ambient temperature in real time. When the detected ambient temperature is greater than the set maximum value, it sends a signal to the controller to open the solenoid valve 11. The clean water in the water supply tank 10 flows to the rotary spray mechanism 5 through the water supply pipe 9 and flows out from the spray hole 5021. The spraying reduces the temperature around the pulley head 1, induces the formation of natural wind, speeds up the rotation of the pulley head 1, and improves the exhaust effect of the flue gas.

[0043] The foregoing general description of the invention and its specific embodiments should not be construed as a limitation on the technical solution of the invention. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the invention, to form other technical solutions within the scope of protection of this application.

Claims

1. A smoke extraction and cleaning system for public flues, comprising a non-powered vent cap and a water supply tank (10); the non-powered vent cap comprises a pulley head (1), a variable angle tube neck (2), and a waterproof base (3); the waterproof base (3) is fixedly connected to the variable angle tube neck (2); the pulley head (1) is provided with a screw (6) and an upper bracket (7) inside; the edge of the upper bracket (7) is connected to the inner wall of the pulley head (1); the variable angle tube neck (2) is provided with a lower bracket (8) inside, the edge of the lower bracket (8) is connected to the inner wall of the variable angle tube neck (2); the upper end of the screw (6) is rotatably connected to the top of the pulley head (1), and the lower end passes through the through hole in the middle of the upper bracket (7) and the lower bracket (8) in sequence; characterized in that: It also includes a helical pneumatic mechanism (4) and a rotary spraying mechanism (5); the helical pneumatic mechanism (4) is located inside the variable angle tube neck (2), and includes a rotating shaft (401) and helical blades (402) located on the outer surface of the rotating shaft (401); the rotating shaft (401) is fixedly connected to the lower end of the screw (6); the rotary spraying mechanism (5) is located inside the pulley head (1), and includes a tube sleeve (501) and a set of blades (402) evenly distributed circumferentially on the tube sleeve (501). 1) External spray plate (502); The sleeve (501) is fitted around the screw (6) and fixed to the upper bracket (7); The surface of the spray plate (502) is provided with multiple spray holes (5021); The spray plate (502) and the sleeve (501) are provided with interconnected water supply cavities; The water supply tank (10) is connected to the rotating spray mechanism (5) through the water supply pipe (9); The water supply pipe (9) is provided with a solenoid valve (11); When in use, the solenoid valve (11) is opened periodically, and the clean water in the water tank (10) flows to the rotary spray mechanism (5) through the water supply pipe (9). With the assistance of natural wind or spiral pneumatic mechanism (4), the rotary spray mechanism (5) rotates with the pulley head (1), and the clean water inside it is sprayed out from the spray hole (5021) to wash the pulley head (1) and the wall of the public flue.

2. The smoke extraction and cleaning system for public flues according to claim 1, characterized in that: The relationship between the height H1 of the spiral pneumatic mechanism (4), the height H2 of the variable angle tube neck (2), and the height H3 of the waterproof base (3) satisfies H1>H2+H3.

3. The smoke extraction and cleaning system for public flues according to claim 2, characterized in that: The ratio of the diameter D1 of the spiral blade (402) to the diameter D2 of the variable angle neck (2) is D1:D2=1 / 2 to 2 / 3.

4. The smoke extraction and cleaning system for public flues according to claim 1, characterized in that: The pulley head (1) includes a cap (101), a bottom ring (102), and a set of fan blades (103) closely arranged between the cap (101) and the bottom ring (102); the cap (101) and the fan blades (103) are both arc-shaped; the two ends of the fan blades (103) are fixedly connected to the cap (101) and the bottom ring (102) respectively by rivets.

5. The smoke extraction and cleaning system for public flues according to claim 4, characterized in that: The inner wall of the cap (101) is provided with a bearing, and the upper end of the screw (6) is inserted into the bearing.

6. The smoke extraction and cleaning system for public flues according to claim 5, characterized in that: The upper bracket (7) is fixedly connected to the inner wall of the bottom ring (102) by rivets; the lower bracket (8) is fixedly connected to the inner wall of the variable angle tube neck (2) by rivets.

7. The smoke extraction and cleaning system for public flues according to claim 1, characterized in that: The solenoid valve (11) is equipped with a temperature sensor.

8. The smoke extraction and cleaning system for public flues according to claim 1, characterized in that: The water supply pipe (9) includes a first water supply pipe (901) disposed on the pipe sleeve (501) and a second water supply pipe (902) disposed on the water supply tank (10); the first water supply pipe (901) and the second water supply pipe (902) are connected by a rotary joint (903).

9. The smoke extraction and cleaning system for public flues according to claim 1, characterized in that: The liquid level in the water supply tank (10) is higher than the top of the spray plate (502) of the rotating spray mechanism (5).

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