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目前一些城市区域内,住宅室内热水供应已较普及。这种区域性供应系统,由于供回水管较长、分支较多,加上用水不均匀,多采用机械循环。系统在运行中常存在以下问题。1.在全循环下行上给式系统中,回水支管从最高配水龙头下0.5m 处与供水管相接,当最高处配水龙头不用时,顶端形成气塞,影响系统内热水正常循环,变成死水,回水管形同虚设,起不到作用。2.区域内因楼房布置需要,有很多分支干管;在地形受限制,局部升高降低处也容易造成气塞。
In some urban areas, domestic indoor hot water supply has become more and more popular. This regional supply system, due to the longer supply and return pipes, more branches, coupled with uneven water, the use of mechanical circulation. The system often runs the following problems. 1. In the full circulation downstream system, the backwater branch pipe is connected to the water supply pipe at a distance of 0.5m from the highest distribution tap. When the highest distribution tap is not used, a gas plug is formed on the top to affect the normal circulation of the hot water in the system, Into stagnant water, return pipe despondent, can not play a role. 2. Due to the need for the layout of buildings in the area, there are many branch mains; in the terrain is limited, the local increase and decrease of the Department is also likely to cause gas plug.