An auxiliary ventilation system for an underground garage

Abstract

The invention relates to the technical field of ventilation, and discloses an underground garage auxiliary ventilation system. The system comprises a plurality of speed limiting grooves arranged in the bottom of a garage. Press blocks and air storage pieces matched with the speed limiting grooves are arranged in the speed limiting grooves, the press blocks are located above the air storage pieces, and reset springs are arranged in the air storage pieces. When a main ventilation system in the garage is shut down, the underground garage auxiliary ventilation system can make part of harmful gas be exhausted out under the effect of automobile kinetic energy, air in the garage is assisted in exchanging with the external air, the natural ventilation effect is improved, meanwhile, the absorbed gas and exhausted gas are both harmful gas at the bottom of the garage, the situation that the harmful gas which is heavier than air and mainly consists of gaseous organic matters is accumulated at the bottom the garage is avoided, therefore the overall content of TVOC in the garage is reduced, the negative pressure effect in the garage is improved, the harmful gas in the garage can be prevented from entering an adjacent room, and finally, a speed limiting function is achieved.

Description

technical field [0001] The invention relates to the technical field of ventilation, in particular to an auxiliary ventilation system for an underground garage. Background technique [0002] With the increase in the number of cars and the shortage of parking spaces, people spend more and more time parking their cars in indoor garages. When the car engine is working, it will consume oxygen and emit more harmful gases. Underground garages are usually covered with ventilation ducts. To maintain the air quality in the garage. [0003] see figure 1 , the ventilation system in the garage includes ventilation ducts covering the top of the garage and high-power intake / exhaust fans, so the ventilation system consumes a lot of energy and produces a lot of noise at the same time. In the underground garage ventilation system In practical application, its start-up time is far shorter than the requirements for the start-up time of the ventilation system of the indoor garage in the "Natio...

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Problems solved by technology

[0003] see figure 1 , the ventilation system in the garage includes ventilation ducts covering the top of the garage and high-power intake / exhaust fans, so the ventilation system consumes a lot of energy and produces a lot of noise at the same time. In the underground garage ventilation system In practical application, its start-up time is far shorter than the requirements for the start-up time of the ventilation system of the indoor garage in the "National Civil Construction Engineering Design Technical Measures - HVAC Power", resulting in poor air quality in the garage (Nanjing Environmental Protection Association 10 underground parking lots were randomly checked, and the air quality in 10 underground parking lots did not meet the standard)

[0004] Secondly, because the main pollution component in automobile exhaust is CO, and the temperature of the exhaust gas is high, the exhaust gas is easy to stay on the top of the garage. The existing exhaust duct is usually designed on the top of the garage, which can effectively discharge the exhaust gas. When the fuel is not fully burned, the exhaust gas will contain more oil vapor that is heavier than air, which slowly diffuses at the bottom of the garage and is difficult to be discharged by the ventilation system at the top. Therefore, in reality, the content of TVOC often exceeds the standard. TVOC has Genotoxicity, long-term exposure can cause immune function decline or even cancer

[0005] In addition, the total exhaust air volume of the ventilation system is usually greater than the total air intake volume, so that the indoor garage will generate negative pressure and prevent the air from the indoor garage from entering adjacent rooms. However, in reality, the opening time of the ventilation system is much shorter than the design requirements. As a result, the negative pressure in the indoor garage is difficult to maintain, and the poor air in the garage will enter the adjacent room, reducing the air quality of the adjacent room

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