青岛市海青机械总厂隶属中国海洋航空集团，系青岛市高息技术企业，1999年通过ISO9000质量管理体系认证。
近年来，开发出具有国际先进技术水平的插接式铜铝管焊接方法和关键设备，并取得了多项专利权，核心发明专利获得第十届中国专利金奖，该技术成本低，效率高，质量好，是世界上目前公认的铜铝焊接最佳方案，海青拥有焊接设备160套，在全国设有7个生产基地，可以大批量生产空调器内外机连接管，以及冰箱、空调、冷库、饮水机产品的制冷铜铝组合管路。每年可以完成各种规格铜铝结构空调器连接管2000万根。
The company has developed the insert-connection Cu-Al pipe welding and its key equipment with internationally developed technology,obtained many patent rights.Its core invention patent won the title of the gold award in the 10th China Patent;with the low cost,high efficiency and good quality,the technology is recognized as the best project as for the welding of copper and aluminum pipe in the world.With 160 sets of welding equipment,Haiqing has established
7 production based all over the country,capable of manufacturing in volume the connection pipes used in interior and exterior units of air conditioners,as well as the refrigeration Cu-Al combination pipes for refrigerator,air conditioner,refrigeratory,and drinking machine,and etc.The company may weld about 20million Cu-Al air conditioner pipes in various specifications each year.