This issue is of great practical value and precisely addresses the key link of environmental control in agricultural modernization. The main function of medium-efficiency bag filters in agricultural greenhouses is to filter out impurities such as dust, pollen and mold spores in the air, providing a clean and stable air environment for crop growth, while protecting the ventilation and irrigation equipment inside the greenhouse.
I. Core Function: Ensure the dual safety of the greenhouse environment and equipment
Purify the air and reduce crop diseases
Greenhouses are relatively closed environments. If a large number of tiny organisms such as mold spores and aphids exist in the air, it is easy to cause diseases such as powdery mildew and downy mildew. Medium-efficiency bag filters can filter out most of such impurities, directly reducing the probability of crop diseases.
Protect key equipment and extend its service life
If the ventilation fans, CO₂ generators, irrigation atomizing nozzles and other equipment in greenhouses are clogged with dust, it will lead to a decrease in efficiency or even malfunctions. Filters can intercept dust particles in the air, preventing them from entering the interior of the equipment and causing wear or blockage.
Stabilize environmental parameters to facilitate precise planting
Clean air makes it easier to control parameters such as temperature, humidity and CO₂ concentration in greenhouses, reducing sensor misjudgments caused by impurities and providing more stable growth conditions for crops. It is especially suitable for scenarios with high environmental requirements such as seedling raising and soilless cultivation.
Ii. Typical Application Scenarios: Matching different crops and planting needs
| Escenarios de aplicación |
Filtering key points |
Function and value |
| Seedling greenhouse | Mold spores, fine dust | Reduce the incidence of damping-off disease and damping-off disease in seedlings |
| Flower/fruit and vegetable greenhouse | Pollen, aphids/whiteflies and other insect bodies | Avoid pollen contamination of petals and reduce the spread of pests |
| Soilless cultivation greenhouse | Dust, microorganisms | Prevent the nutrient solution pipeline from clogging and avoid root infection |
| Greenhouse for transplanting tissue culture seedlings |
High-concentration microorganisms and dust |
Connect the tissue culture environment with the field environment to improve the survival rate |
Iii. Key Points to Note in Application
Match the filtration efficiency with the air volume
The appropriate specification of filter should be selected based on the area of the greenhouse and the ventilation volume. If the air volume is too large and the filtration efficiency is insufficient, it will lead to the leakage of impurities. If the efficiency is too high and the air volume is insufficient, it will affect the ventilation of the greenhouse and lead to an imbalance in temperature and humidity.
Regular replacement and maintenance
The concentration of dust and pollen in the greenhouse environment is relatively high, and the filters are prone to clogging. It is recommended to regularly check the pressure difference based on the usage situation (usually every 1 to 3 months). When the resistance exceeds 50% of the initial value, replace it in time to avoid poor ventilation due to blockage.
Use in combination with other filtration devices
Medium-efficiency bag filters are mostly used as “intermediate links”. The front end can be combined with primary filters (such as nylon nets) to intercept large particle impurities, and the back end can be combined with high-efficiency filters according to requirements to form a multi-stage filtration system of “primary + medium” or “primary + medium + high-efficiency”, meeting higher cleanliness requirements (such as tissue culture seedling greenhouses).
