Aerosol particulate matter collecting device and collecting method

Collecting and detecting equipment, comprising a particulate matter detector and an aerosol particulate matter collecting device,

• wherein the aerosol particulate matter collecting device comprises:
• a shell, provided with an air inlet and an air outlet;
• a first electric field component, connected to the shell and forming a first electric field area, and is configured for enabling aerosol passing through the first electric field area to carry first electric charges;
• a second electric field component, connected to the shell and forming a second electric field area, wherein the second electric field area is located downstream of the first electric field area, wherein the second electric field component comprises a first plate and a second plate located above the first plate, and a potential difference is formed between the first plate and the second plate, and an electric property of the first plate is opposite to an electric property of the first electric charges;
• and
• a collection unit, arranged inside the shell, wherein a bottom plate of the collection unit is located between the first plate and the second plate, and is provided with protrusions, and wherein a flow channel for accommodating collecting liquid is formed in the bottom plate, and the protrusions are configured to enable the flow channel to extend along a curve;
• wherein the particulate matter detector is communicated with the collection unit so as to guide the collecting liquid into the particulate matter detector.

An aerosol particulate matter collecting method, comprising the following steps:

• collecting a target aerosol;
• enabling the target aerosol to pass through a first electric field area to form a pretreated aerosol carrying first electric charges so as to form the pretreated aerosol;
• enabling the pretreated aerosol to enter a cyclone separation area so that aerosol particulate matter separated in the cyclone separation area falls into a collecting liquid;
• enabling the pretreated aerosol to enter a second electric field area, and controlling an electric property of a lower plate in the second electric field area to be opposite to an electric property of the first electric charges, so that additional particulate matter in the pretreated aerosol is attracted by the lower plate and falls into the collecting liquid;
• and
• providing a collection unit at a bottom of the cyclone separation area and the second electric field area, wherein the collection unit is provided with protrusions and a flow channel limited by the protrusions, wherein the flow channel is configured for accommodating the collecting liquid, and the collection unit is provided with a liquid inlet and a liquid outlet which are communicated with the flow channel, the liquid inlet and the liquid outlet are communicated through a pipeline, and the pipeline is provided with a pump.