附錄AThe water heater already becomes essential domestic electric appliances regarding the modern city and countryside family, according to the statistics, the water heater (including fuel gas, electricity, solar energy and so on) has at present achieved 71.5% in the Chinese cities family popular rate, year sales volume 12,000,000, about social inventory close 150,000,000, after already became continues the color television, the refrigerator, the washer, air conditioning fifth everybody uses the electric appliance. But electric boiler because it has the security, the environmental protection, the health, does not have the pollution and so on many merits, already gradually replaced the fuel gas water heater to become consumer's new favorite, became in the small household electrical appliances profession one of rate of rise quickest electrical appliances products. According to the pertinent data demonstrated, although the total quantity was still short in the fuel gas water heater, the electric boiler already had achieved in 2003 market share 39%, have surpassed the fuel gas water heater 35% market share. Climbs gradually along with the electric boiler market share, the electric boiler security problem more and more arouses people's interest. According to the related investigation demonstrated, consumer when purchase electric boiler product most cared about the factor is a security. But data which provides according to National Quality Examination Department, the domestic entire water heater profession product average qualified rate has surpassed 80%, but, the water heater security accident still emerged one after another incessantly. In 2003, China Consumer Association altogether accepted about water heater suit 6791, in which about the security aspect suit is 386.After all, so grave as to affect a human life, how can guarantee the electric boiler the safety performance and the use security? The author took for a long time is engaged in the factory personnel who the electric boiler sells, chats own in this view.Says from the theory, the electric boiler security or not involves to entire product each part. We usually say the security mainly is refers to the electric boiler to leak, to scald the human in a big way these two the security hidden danger which with the consumer life, the health is closely linked. In fact, so long as is the present regular factory production electric boiler product, all designed the corresponding multiple security measure in the product, the consumer has not used the worry. From electric boiler product itself, its security mainly manifests in following several aspects:First, electric boiler in gallbladder. Just like the air conditioning product its quality key in the compressor, regarding the electric boiler product, in the gallbladder is each electric boiler product most core part. In the gallbladder main function is the water storage, and must have the bearing pressure, the heat preservation, not easy to rust away, not the easy scaling, not material qualities and the technological requirement and so on water leakage. Achieved these to be able to guarantee consumer's in use water used safety. Then because but because possible not to exist rusts away or the scaling creates the perforation the water leakage, the leakage or in the gallbladder material quality bearing pressure insufficiently creates security hidden dangers and so on the detonation. In order to avoid appearing such security accident, the electric boiler in gallbladder manufactures the material quality and the production craft are we when selects and purchases the electric boiler product want the most important inspection the content. In electric boiler product sells which in the present market, the stainless steel and the enamel are the electric boiler production enterprise manufacture the electric boiler two kind of most main in gallbladder material quality. Two kind of material qualities have its fit and unfit quality respectively, mainly looked it in craft whether maximum limit gets up the anticorrosion, the rust prevention, the corrosion prevention, guards against leaks, and the present electric boiler manufacturer mostly pledged, in the gallbladder guaranteed usable five years, some even proposed the guaranteed usable eight years pledge, appeared in the gallbladder water leakage accidentally in the factory pledge deadline, may obtain the factory free replacement new machine service. Second, electric boiler preheater pipe. The electric boiler product security is decided to a great extent by the preheater pipe quality which uses. It is well known, the electric boiler is depends on the preheater pipe to come in gallbladder in cold water heating, preheater pipe long time soaking in the water, also are innumerable in the use a time work, therefore uses the high quality preheater pipe is the good electric boiler safeguard. Generally speaking, the high quality preheater pipe has the highly effective water and electri。