Rainproof top exhaust device
Through the design of the gas collecting room and the inverted exhaust exit inside the building, combined with the functions of water collecting and drainage pipes, the problem of pollution gas discharged from the exhaust port was inhaled by fresh air, and the efficient exhaust and air exhaust and air exhaust and air exhaust and air -end The high degree of control of the building has reduced the risk of safety accidents.
Patent Information
- Application Number
- CN202421234775.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
In construction projects, polluted gas discharged from the exhaust outlet may be sucked in by the fresh air inlet, causing polluted air to enter the room and affecting the health and safety of people. The prior art is difficult to ensure exhaust efficiency while avoiding polluted gases interfering with fresh air while controlling building height.
Design a kind of rainproof roof exhaust device, including setting up gas collecting rooms inside the building, and collecting polluting gas to the gas collection room through the exhaust entrance. The design of the drain pipe forms an effective pollution gas emissions and rainwater collection system.
Effectively avoid the interference of pollution gases to fresh air, improve the efficiency of exhaust air, control the height of the building, save civil construction prices, and reduce the safety accident caused by the pollution gases into the room.
Smart Images
Figure CN222417804U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a rainproof top exhaust device, which is suitable for the field of building engineering ventilation. Background Art
[0002] In the construction industry, in order to supply fresh air for the survival of people in the building, to maintain the ventilation and heat dissipation required for the normal operation of equipment, and to remove toxic and harmful gases generated in accidents, it is necessary to supply and exhaust air in the space of the building. The specification stipulates that the horizontal distance between the accident ventilation exhaust port and the air inlet of the mechanical air supply system should not be less than 20m. When the horizontal distance is less than 20m, the exhaust port should be higher than the mechanical air inlet and should not be less than 6m.
[0003] In engineering design, when the mechanical air inlet and outlet for emergency ventilation are designed on the building facade, they are usually implemented in accordance with the above-mentioned specifications. However, under certain specific conditions, even if the requirements of the above specifications are met, there is still a situation where part of the polluted air discharged from the exhaust outlet is sucked into the fresh air inlet. For example, when the air intake and exhaust volume are large, such as reaching hundreds of thousands of cubic meters per hour, plus the exhaust wind speed of the conventional rainproof louver vents that is diagonally downward, CFD simulation research has found that part of the polluted gas discharged from the exhaust outlet will be sucked into the fresh air inlet. The polluted fresh air entering the room may have a certain impact on the health of personnel. If the exhausted gas is toxic, harmful and explosive gas, it will be sucked into the room by the fresh air vent, which may also cause personnel safety accidents and production safety accidents.
[0004] In order to prevent the toxic, harmful and explosive gases discharged from the exhaust vents from being sucked into the fresh air, when the mechanical air inlet and exhaust vents are designed on the building facade, the horizontal or vertical distance between the two needs to be increased, but this may cause problems such as increased building height and increased construction costs. Therefore, it is necessary to design an exhaust device that can prevent polluted gases from interfering with the incoming fresh air while keeping the building height relatively low. Utility Model Content
[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and provide a rainproof roof exhaust device, which should be able to prevent polluted gases from interfering with the incoming fresh air and at the same time control the building height at a relatively low height.
[0006] The technical solution adopted by the utility model is:
[0007] A rainproof roof exhaust device, characterized in that: it includes an air collecting chamber arranged inside a building and using the roof of the building as the top surface; the bottom surface or at least one side surface of the air collecting chamber is respectively provided with an exhaust inlet; the top surface of the air collecting chamber is provided with an exhaust outlet; the inside of the air collecting chamber is provided with a water collecting hopper located a certain distance directly below the exhaust outlet; the water collecting hopper is connected to the outside of the air collecting chamber through a drain pipe.
[0008] The exhaust outlet is configured to be an inverted cone that gradually contracts along the airflow direction.
[0009] A bracket is arranged in the air collecting chamber; the water collecting bucket is fixed on the bracket; and the water collecting bucket is arranged in a funnel shape.
[0010] The drainage pipe is connected to the bottom of the water collecting bucket and extends horizontally to the outside of the air collecting chamber with a certain slope; at least one U-shaped water trap is arranged on the drainage pipe.
[0011] The exhaust outlet corresponds to the exhaust inlet position at the bottom of the air collecting chamber.
[0012] The exhaust outlet is arranged at the center position of the top surface of the air collecting chamber; the exhaust inlet on the bottom surface of the air collecting chamber is arranged at the center position of the bottom surface of the air collecting chamber.
[0013] The exhaust inlet on the side of the air collecting chamber is arranged at the center of the side of the air collecting chamber.
[0014] The distance between the top of the water collecting bucket and the top surface of the air collecting chamber is approximately one quarter of the height of the air collecting chamber.
[0015] The beneficial effects of the utility model are:
[0016] 1. The utility model centrally connects multiple exhaust inlets to the air collecting chamber, and the exhaust outlet is arranged on the top surface of the air collecting chamber, so that the polluted gas is uniformly discharged from the roof of the building. When the design wind speed of the top exhaust outlet is relatively large, an upward jet field can be formed, which is conducive to the diffusion of polluted gases, thereby avoiding the interference of polluted gases on the incoming fresh air as much as possible, and at the same time the building height can be controlled at a relatively low height.
[0017] 2. The utility model is provided with a water collecting bucket just below the exhaust outlet. There is a certain distance between the top of the water collecting bucket and the top surface of the gas collecting chamber, which will not affect the discharge of polluted gases and can collect rainwater, thus avoiding rainwater from entering the building due to the exhaust outlet being arranged on the roof of the building.
[0018] 3. A U-shaped water trap is provided on the drainage pipe of the water collecting bucket. The water in the water trap forms a water seal, which can achieve the effect of blocking gas drainage and prevent polluted gas from being discharged from the drainage pipe.
[0019] 4. The exhaust outlet is designed as a gradually shrinking inverted cone, which can accelerate the speed of polluted gas, quickly discharge pollutants in the air collecting chamber, and improve exhaust efficiency.
[0020] 5. Compared with the mechanical air inlet and exhaust vents designed on the building facade, the utility model can control the building height at a relatively low height, save civil construction costs, has certain economic value, and to a certain extent avoids the occurrence of personnel safety accidents and production safety accidents caused by the exhaust of toxic, harmful and explosive gases being sucked into the room by the fresh air vents. It is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0022] Figure Number:
[0023] 1. Air collecting chamber, 2. Building roof, 3. Exhaust outlet, 4. Exhaust inlet, 5. Air flow direction, 6. Water collecting bucket, 7. Drain pipe, 8. Trap, 9. Bracket. DETAILED DESCRIPTION
[0024] The following is a further description with reference to the embodiments shown in the accompanying drawings.
[0025] In the field of building engineering ventilation, traditional mechanical air inlets and exhaust vents are designed on the facade of the building. The horizontal distance between the exhaust vent and the air inlet of the mechanical air supply system should not be less than 20m. When the horizontal distance is less than 20m, the exhaust vent should be higher than the mechanical air inlet and should not be less than 6m. However, when the air intake and exhaust volumes are large (for example, reaching hundreds of thousands of cubic meters per hour), part of the polluted gas discharged from the exhaust vent will be sucked into the fresh air inlet. The polluted fresh air entering the room may have a certain impact on the health of personnel, and may also cause personnel safety accidents and production safety accidents. In order to avoid this situation, when the mechanical air inlet and exhaust vents are designed on the facade of the building, the horizontal or vertical distance between the mechanical air inlet and exhaust vents needs to be increased, but this may cause problems such as increased building height and increased construction costs, which need to be solved urgently.
[0026] like Figure 1The rainproof roof exhaust device shown includes a gas collecting chamber 1 arranged inside a building, and the top surface of the gas collecting chamber 1 is the building roof 2. The bottom surface and at least one side surface of the gas collecting chamber are respectively provided with exhaust inlets 4, through which polluted gases can be uniformly collected into the gas collecting chamber 1. The top surface of the gas collecting chamber 1 is provided with an exhaust outlet 3 for discharging polluted gases from the gas collecting chamber 1. The exhaust outlet 3 corresponds to the position of the exhaust inlet 4 at the bottom of the gas collecting chamber 1, so that the polluted gases at the bottom of the gas collecting chamber 1 and the exhaust outlet 3 can form a relatively smooth airflow channel, ensuring that the airflow at the exhaust inlet flows smoothly and stably to the exhaust outlet 3, reducing the vortex inside the airflow space. Preferably, the exhaust outlet 3 is arranged at the center of the top surface of the gas collecting chamber 1; the exhaust inlet 4 at the bottom surface of the gas collecting chamber 1 is arranged at the center of the bottom surface of the gas collecting chamber 1; and the exhaust inlet 4 at the side of the gas collecting chamber 1 is arranged at the center of the side of the gas collecting chamber 1.
[0027] A bracket 9 is fixed to the bottom surface of the gas collecting chamber 1, and a water collecting hopper 6 is fixed on the bracket 9. The water collecting hopper 6 can collect rainwater to prevent rainwater from entering the building due to the exhaust outlet 3 being set on the roof of the building. The water collecting hopper 6 is located at a certain distance directly below the exhaust outlet 3 so that the polluted gas can be discharged smoothly from the exhaust outlet 3. Preferably, the distance between the top of the water collecting hopper 6 and the top surface of the gas collecting chamber 1 is about one-fourth of the height of the gas collecting chamber. The water collecting hopper 6 is arranged in a funnel shape, and the water collecting hopper 6 is connected to the outside of the gas collecting chamber 1 through a drain pipe 7. The drain pipe 7 is connected to the bottom of the water collecting hopper 6 and extends horizontally to the outside of the gas collecting chamber 1 with a certain slope; at least one (one in this embodiment) U-shaped water trap 8 is arranged on the drain pipe 7; when working, the water in the water trap 8 forms a water seal, which can achieve the effect of blocking gas and draining water, and prevent the polluted gas in the gas collecting chamber 1 from being discharged from the drain pipe 7.
[0028] The working principle of the utility model is as follows:
[0029] The utility model centrally connects a plurality of exhaust inlets 4 to the air collecting chamber 1, so that polluted gases are uniformly discharged from the exhaust outlets 3 on the roof 2 of the building. When the design wind speed of the top exhaust outlet 3 is relatively high, an upward jet field can be formed, which is beneficial to the diffusion of polluted gases, thereby avoiding the interference of polluted gases on the incoming fresh air as much as possible, and at the same time the building height can be controlled at a relatively low height.
[0030] In order to accelerate the flow rate of the polluted gas and quickly discharge the pollutants in the air collecting chamber 1, the exhaust outlet 3 is configured to be an inverted cone that gradually contracts along the air flow direction 5 to improve the exhaust efficiency.
[0031] Compared with traditional mechanical air inlets and exhaust vents designed on the building facade, the utility model can control the building height at a relatively low height, thereby saving civil construction costs and having certain economic value. To a certain extent, it avoids the occurrence of personnel safety accidents and production safety accidents caused by the exhaust of toxic, harmful and explosive gases being sucked into the room by the fresh air vents, and is suitable for popularization and application.
[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A rainproof roof exhaust device, characterized in that: The invention comprises a gas collecting chamber (1) arranged inside a building and having a roof (2) of the building as a top surface; an exhaust inlet (4) is arranged on the bottom surface or at least one side surface of the gas collecting chamber (1); an exhaust outlet (3) is arranged on the top surface of the gas collecting chamber (1); a water collecting hopper (6) is arranged inside the gas collecting chamber (1) and is located a certain distance below the exhaust outlet (3); the water collecting hopper (6) is connected to the outside of the gas collecting chamber (1) through a drainage pipe (7).
2. The rainproof roof exhaust device according to claim 1, characterized in that: The exhaust outlet (3) is arranged in an inverted cone shape that gradually contracts along the airflow direction (5).
3. The rainproof roof exhaust device according to claim 1, characterized in that: A bracket (9) is arranged in the air collecting chamber; the water collecting bucket (6) is fixed on the bracket (9); and the water collecting bucket (6) is arranged in a funnel shape.
4. The rainproof roof exhaust device according to claim 3, characterized in that: The drainage pipe (7) is connected to the bottom of the water collecting bucket (6) and extends horizontally to the outside of the air collecting chamber (1) with a certain slope; at least one U-shaped water trap (8) is provided on the drainage pipe (7).
5. The rainproof roof exhaust device according to any one of claims 1 to 4, characterized in that: The exhaust outlet (3) corresponds to the position of the exhaust inlet (4) at the bottom of the air collecting chamber (1).
6. The rainproof roof exhaust device according to claim 5, characterized in that: The exhaust outlet (3) is arranged at the center of the top surface of the air collecting chamber (1); and the exhaust inlet (4) on the bottom surface of the air collecting chamber (1) is arranged at the center of the bottom surface of the air collecting chamber (1).
7. The rainproof roof exhaust device according to claim 5, characterized in that: The exhaust inlet (4) on the side of the air collecting chamber (1) is arranged at the center of the side of the air collecting chamber (1).
8. The rainproof roof exhaust device according to claim 1, characterized in that: The distance between the top of the water collecting bucket (6) and the top surface of the air collecting chamber (1) is approximately one quarter of the height of the air collecting chamber (1).