The environmental protection air conditioner cools the air outside the workshop and then sends it to the workshop for cooling. The utility model is provided with an environmental protection air conditioner on the outer wall of the workshop. The environmental protection air conditioner supplies air to the interior of the workshop through a fan. When the fresh air from the outside passes through a wet curtain soaked in water, The air and water are fully contacted, and the sensible heat at the air focus is absorbed to achieve cooling, ventilation and dust removal, and the oxygen content of the air in the workshop is improved. The scheme is especially suitable for high temperature and crowded places.

The cooling curtain system used for the cooling and ventilation of the factory floor sends the air outside the workshop to the workshop for secondary cooling. A cooling water curtain is set at the window opposite or on one side wall of the negative pressure fan in the workshop. Through the cooling water curtain, the replenishing air flowing into the workshop is carried out secondary cooling. The cooling effect of this method is very good with the negative pressure fan. Attention should be paid to the quantity and flow rate of the air flow in the water curtain cooling system should be enough to supplement the quantity and flow rate of the hot air flow out of the workshop. At the same time, the sealing work of the workshop should be done well, and the air flow into the workshop should be ensured as far as possible through the water curtain cooling system.

The negative pressure fan is used for cooling and ventilating the high temperature and sultry air in the workshop. By setting negative pressure fans in the workshop walls and Windows of the workshop, a large number of high temperature and sultry air gathered inside the workshop is forced to the outside of the workshop, resulting in a negative pressure situation inside the workshop, and the air outside the workshop is forced to flow into the workshop for convection ventilation, which reduces the high temperature and sultry air inside the workshop and increases the air flow speed inside the workshop. This method is suitable for the original poor air flow And the whole workshop has high temperature and hot conditions to be solved.