【正文】 strong , weak electricity every system to do a tube again. Such is arranged than form arrangement is other paratively economical , pragmatic. 10) Exchangers forms choice. In the system the tradition hospital hot water is supplied, people adopt volume mainly dyadic exchanger. Have been to think that what be provided steam amounts and hot water supplies the adjustment amounts dispatching value between maximum value mainly , have diminished a steam boiler designing amounts , have decreased by boiler room Zhan field area , have saved one time investment. People demands but more highly, and more highly, especially the example discovering army group bacterium pathopoiesia in life hot water to water quality now , the altitude arousing people takes seriously. Be a bacterium mainly because of in the water 55 ~C is the easiest to breed an army group in 30 ~C ~, WHO (WHO) is remended by for this purpose: Hot water responds to in 60 ~C use And cycle at least above 50 ~C. Come if some users, need to fall to 40 ~C or 50 ~C or so with the faucet water temperature, to e true being able to use a thermoregulation to blend a valve at this time. The growth being a temperature Bu Li Yu pneumonia diplococcus swear to store water, is a regulating valve39。s to the same multilayer has been already sufficient , has been in a small town especially since but municipal administration pipe work water yield supplying water , water pressure fluctuation are bigger. Have several kinds the following types mainly for overe these shortings , multilayer water supply system design. 1) Direct water supply type is that pressure , direct water supply , sort making use of municipal administration pipe work directly apply to slightly high area of municipal administration pipe work pressure or higher range of water works vicinity pressure inner. The shorting it is water yield , water pressure to be able to not ensure that. This water supply scheme economy function is very good but, to less pipe work of scale , does not need any other equipment or measure. 2) Water box water supply types have led municipal administration pipe work water to roof water box , discrepancy in elevation , gravity depending on a water box and using the water appliance have supplied water , have overe water pressure water yield block of wood stability and then. Since but, secondary pollution, moreover, water box volume that the water box there exists in possibility is bigger,this way does not encourage therefore. 3) Water boxes , pipe works ally self with a type when the ordinary time water yield water pressure is sufficient , unnecessary water enters the roof water box when covering water supply , overpressure as with a directly from municipal administration, think that the water box supplies water to the consumer by gravity automation when pressure or the water yield is insufficient. The main force who is that regular directness supplies water on physics structure stretches the top cutover water box , sets up and one exhalent siphon from the water box. Owe a scheme the volume having diminished a water box, and make water not need to enter a water box staying this one step , hygiene reliability increase by. The problem is (that the municipal administration now pipe work can acplish) but if longtime stabilivolt supplies water , the water sojourn time in water box is on the contrary greatly increase by , easier to be contaminated. And, the water box all must readjust oneself to a certain extent in the building in all usage water boxes system most higher place, attractive looks being able to affect a building in some occasion , the physical design building even. 4) Pressure jars supply water since insecure