Device for automatically forcing to discharge and ventilate air for passenger car and driver's compartment

Abstract

The invention relates to an automatic compulsive air exhaust and exchange device for a car and a cab; the two prolonged sides of the upper cover of a skylight are provided with a foldable wind deflector which leads to collecting more air to form a certain pressure and velocity of flow and being blew into the car as well as leads the air in the car to flow out of the car from an air gate for one aspect; for the other aspect, air collection tubes of a venturi is arranged at the car and the cab; the venture is internally communicated with a waste gas sucker outlet and the waste gas sucker outlet is communicated with the inside of the car; the air collected after the car starts flows out from the venture; known from hydromechanics, if the section area of each location of a pipeline is different, the velocity of flow and the static pressure of the pipeline are also different; the smaller the section area is, the larger the velocity of flow is and the lower the static pressure is; then the waste gas can be automatically exhausted to the outside of the car and fresh air can be sucked into the car again from an air inlet; the two are combined in summer to 'pump out' and 'blow in' to quicken the air flowing in the car to form 'cross ventilation'; the effects of ventilation, air exchange, temperature reduction and refrigeration are better; the air inlet is closed in winter to lead the fresh air to be heated by the hot water heating device of an engine and then sucked into the car, thus leading the inside of the car to be ventilated and warmed. The air conditioning can be opened less or not opened in summer and winter, thus saving energy and protecting the environment.

Description

technical field [0001] The invention relates to air conditioning technology and physical fluid mechanics of automobiles. Background technique [0002] At present, passenger cars such as cars, large and medium-sized passenger cars, taxis, buses, rail cars and passenger trains and truck cabs, the exhaust gas in the car is discharged and the intake of fresh air is mainly exchanged by the same window. However, when the air is cold in winter, early spring and late autumn, the windows cannot be opened wide, otherwise the people sitting by the windows will not be able to bear it. The small opening of the window can only allow the air to flow by the window, but the air in the car still cannot flow. The space inside the car is so big, the air is not circulated, people need to inhale less and less oxygen all the time, and the exhaled carbon dioxide, human body waste, inhalable particulate matter and harmful gases from the engine will accumulate more and more, repeatedly breathing the...

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