Clean workshop purification on the one hand is to send clean air to dilute the indoor polluted air, on the other hand is to quickly discharge the high concentration of indoor polluted air. In order to ensure the cleanliness of the air required by the production environment or the clean room for other purposes, it is necessary to take comprehensive measures in many aspects. What are there to keep the clean workshop clean?

(1) Control pollution sources and reduce pollution occurrence

Maintain the positive pressure of the air-conditioned room. If the room appears negative pressure or positive pressure value is lower than the adjacent room, the outdoor and surrounding room air will be seeped by the doors and Windows, especially in the purification air conditioning system, the purification level is higher than the positive pressure value of other rooms. The cleanliness of medical design is at least greater than 10 Pa than the non-clean area, and greater than 10 Pa between different cleanliness levels.

(2) prevent outdoor pollutants from invading the room

This is the main way to control pollution in dust-free workshop, mainly involving the method of air purification treatment, indoor pressure control, etc. For air conditioning, three filtration measures are adopted: through coarse, medium and high efficiency three filtration, layer by layer, the dust particles are blocked before the high efficiency filter, and clean air is sent into the room. According to the cleanliness requirements of the room, different ways are sent into the specific treatment, the amount of clean air, and the corresponding amount of air carrying indoor pollutants is discharged at the same time. By such a dynamic balance, the indoor air is maintained at the required cleanliness level.

Purifying the room must ensure that there are three levels of filtration: coarse effect, medium effect, and efficient filtration. To strengthen the management of air conditioning purification. The staff should abide by the system and operating procedures to ensure that the indoor hygiene meets the requirements of purification.

(3) quickly and effectively eliminate indoor pollution that has occurred

Reasonable air distribution, that is, through the careful design of the location, size and form of the air supply outlet and the air return outlet, the air flow in the workshop can flow in a certain direction to prevent dead corners and secondary pollution. Different air distribution directly affects the difficulty and cost of construction. General cleanliness level higher than 5 clean dust-free workshops are unidirectional flow, in which the vertical unidirectional flow effect is good, but the cost is also high. The clean and dust-free workshop with cleanliness level of 6~9 is organized by non-unidirectional flow.

(4) Flow rate control

Clean and dust-free workshop air flow must have a certain speed, in order to prevent other factors (such as heat flow) disturbance. But it can not be too large, the flow rate is too large will make the indoor dust, causing pollution. To ensure the rationality of air distribution in air conditioning rooms. If the air distribution is destroyed, not only the indoor temperature distribution will be affected, but also the dirty air near the corner and the ground will diffuse to the indoor working area because of the large amount of flow through the cochlea. Therefore, the table in the air conditioning room, the layout of equipment should take into account the rationality of air distribution. The equipment cannot block the return air outlet, and the return air outlet louver is strictly prohibited to move.

(5) the air tightness of the system

To ensure the rationality of air distribution in air conditioning rooms. If the air distribution is destroyed, not only the indoor temperature distribution will be affected, but also the dirty air near the corner and the ground will diffuse to the indoor working area because of the large amount of flow through the cochlea. Therefore, the table in the air conditioning room, the layout of equipment should take into account the rationality of air distribution. The equipment cannot block the return air outlet, and the return air outlet louver is strictly prohibited to move.

(6) Construction measures

It involves the design of the surrounding environment of the building, the construction of the building, the selection of materials, the layout of the plane, the design of air tightness measures. For example, the use of less dust, not easy to breed microorganisms indoor decoration materials and furniture.