What Is Air Filtration?

Air filter refers to the air filtering device. There are five types of coarse filter, medium efficiency filter, high medium efficiency filter, sub high efficiency and high efficiency filter. Each model has different standards and performance . Air filters, pressure valves, and oil misters are called pneumatic three parts, and are generally used in clean workshops, workshops, operating rooms, laboratories, etc., or for dust prevention of electronic mechanical communication equipment. The pollution sources for clean rooms mainly refer to the two major categories of dust and bacteria.

Air filtration

Air filter dust

The amount of dust in the clean room can be excluded from the equipment through local exhaust, and does not flow into the clean room. The dust generated by products and materials during transportation is generally smaller than the amount of dust emitted by the human body and can be ignored. Because clean interior decoration uses better metal siding, the amount of dust from the building surface is also very small, generally accounting for less than 10%, and the dust is mainly from people, accounting for about 90%.

Air filtration bacteria

dust-free workshop

(1) When the staff in the clean room wears sterile clothing:

The amount of germs when stationary is generally 10 300 per minute. people

The amount of germs during general activities is generally 150 to 1000 per minute. people

The amount of bacteria when walking quickly is generally 900-2500 per minute. people

(2) A cough is usually 70 to 700 per minute. people

One sneeze is generally 4,000 to 60,000 per minute. people

(3) The amount of bacteria when wearing ordinary clothes: 3300 62000 / min. people

(4) Bacteria without mask: The amount of bacteria with mask is 1: 7 1: 14

(5) The amount of germs: the amount of dust is 1: 500 1: 1000

(6) The amount of bacteria generated by the personnel during the operation: 878 / min. people

Therefore, it is known that the static germ volume of personnel wearing aseptic clothes in clean rooms generally exceeds 300 per minute. In humans, the dynamic germ volume generally does not exceed 1000 per minute. people