Real human body breathing simulation device and method

Abstract

The invention relates to a real human body breathing simulation device and method. The device comprises an exhaling pump, an inhaling pump and a heater system; a main body of the exhaling pump is a sealed gas cylinder, the interior of the gas cylinder is provided with a sealed piston, and the piston is connected with a rack through a bolt; a stepping motor outside the gas cylinder is in cooperative connection with the rack through a gear; a DSP controller is connected with a driver through a control line, and the driver is connected with the motor through a driving guide line; the other side of the gas cylinder is provided with two vent holes, and vent pipes of the two vent holes are connected with the gas cylinder through one-way valves respectively; the exhaling pump has the same structure as the inhaling pump while the tail end part of one vent pipe of the exhaling pump is provided with a heating element; a power supply is connected with the heating element by a time relay. Experimental errors brought by a conventional human body breathing device are overcome. The real response degree of experiment working conditions on real working conditions is improved, a pollution exposure level and a spreading rule of a human body breathing zone can be accurately reflected, and an important role is played for improving the building indoor air quality.

Description

technical field [0001] The invention relates to an important simulation device and method for studying the exposure level of human body pollutants in buildings and the transmission of respiratory pollutants, and belongs to the field of indoor air quality and pollutant transmission. Background technique [0002] Modern people spend about 90% of their time indoors, and a good indoor environment can make people feel energetic, healthy, and work efficiently. However, in the past three decades, many countries in the world have experienced problems with indoor air quality, and many people have complained about poor air quality. Indoor air pollution can cause three diseases: sick building syndrome, building-related diseases, and allergies to various chemical pollutants. In addition, poor indoor air quality can lead to asthma and even cancer. [0003] Compared with developed countries, my country's indoor air quality problems are more serious and have a wide range of sources. Its...

AI Technical Summary

Problems solved by technology

Its main disadvantages: 1) It ignores the transient nature of the human breathing process, and also ignores the directionality of the breathing jet 2) It does not reflect the process of human inhalation

At present, breathing devices that simulate the real human breathing process are rarely used in China. Foreign scholars [3] pointed out through CFD simulation analysis that when using a constant breathing boundary to study the spread of pollutants, there will be relatively large errors in the human microenvironment, so it is very necessary Develop a device that mimics the normal breathing process of the human body, especially in the current situation of severe air pollution

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