High efficiency and energy saving fan,water cycle system,ball float valve with fill up cold water device. Air cooler is divided into ... DL, DD, DJ series ceiling suspended air coolers.The D series air-cooler/evaporator are air-coolers applicable to various cold storage houses ... /evaporator is anti-rusty,corrosion proof,and high reliability.Long air duct is capable to be fixed with the products.All the ...