Continuous bioaerosol sampling device and method

A continuous bioaerosol sampling device, comprising:

• a sampling component configured for collecting a sample solution, comprising:
• a sampling cup configured for receiving a sampling solution which is mixed with particulate matters in ambient air to form the sample solution;
• a sampling head connected to the sampling cup, which is formed with a circumferential air-inlet passage corresponding to a peripheral area of the sampling cup and a central air-outlet passage corresponding to a center area of the sampling cup;
• and
• a fan connected to the sampling head, with an air suction end of the fan in air communication with the circumferential air-inlet passage and an air exhaust end of the fan in air communication with the central air-outlet passage, wherein the fan is configured to drive the ambient air entering the sampling head to pass through the central air-outlet passage and form an air flow spirally flowing along an axis of the sampling cup, allow the particulate matters in the air flow to mix and react with the sampling solution in the sampling cup to form the sample solution, and further allow the remaining air flow entering the sampling cup to flow to the central air-outlet passage of the sampling head from the center area of the sampling cup, which is finally discharged from the air exhaust end of the fan;
• a liquid replenishing component, comprising:
• a liquid storage container for storing the sampling solution;
• and
• a pump for supplying or replenishing the sampling solution from the liquid storage container to the sampling cup;
• and
• a control component, comprising:
• a liquid shortage sensor arranged between the liquid storage container and the pump, which is configured for detecting whether the sampling solution in the liquid storage container is supplied to the sampling cup;
• and
• a liquid level sensor for detecting a liquid level of the sampling solution in the sampling cup;
• wherein the control component is configured to control the pump to supply or replenish sampling solution form the liquid storage container to the sampling cup, in a response to a signal detected by the liquid shortage sensor indicating that the sampling solution in the liquid storage container is supplied to the sampling cup and a signal detected by the liquid level sensor indicating that the liquid level in the sampling cup is less than a predefined threshold value, and control the pump and the fan to inactivate, in a response to a signal detected by the liquid shortage sensor indicating that the sampling solution in the liquid storage container is not supplied to the sampling cup or a signal detected by the liquid level sensor indicating that the liquid level in the sampling cup reaches the predefined threshold value.