What is the material of Huangming solar electric heating tube?
As an auxiliary solar heat source, the safety performance of electric heating tube is very important.
Electric heating tube has an anti-dry burning test. If this test is not carried out or the test time is short, the dry burning resistance of the product is poor. Once the user forgets to unplug the power supply, it will burn and puncture the wire. In severe cases, there will be fire and life-threatening. According to the national standard, dry burning takes 4 hours to reach the standard, while Huangming dry burning takes at least 72 hours (three days and three nights), so that even if the user forgets to unplug the power supply, it will not cause a fire after a long time. Huang Ming live products have maintained an excellent record of no safety accidents for 10 years.
Huang Ming Electric Heating Dry Burning Test for 72 Hours
It is understood that in the use of solar water heaters, the internal temperature is high, and electric heating will cause electrochemical corrosion: in high temperature environment, cl ions in water will cause electrochemical corrosion of the pipe wall, which will turn iron atoms into rust and form local corrosion (in reality, we can see that the distribution of rust spots on the surface of electric heating pipes is uneven).
Electric heating of solar water heaters can also cause cavitation: in areas with poor water quality, the surface of electric heating pipes is easily covered with a thick layer of scale, and the density of scale varies, forming scale micropores. At the beginning of electric heating, the local temperature at the micropores of the scales is high, water vaporizes to form many bubbles, and local negative pressure is generated. The liquid is replenished at a very high speed and hits the metal surface, and the metal surface is peeled off or perforated due to impact fatigue. If some active gas is mixed into the bubbles, electrochemical corrosion will also be formed.
If the electric heating is corroded, it will be directly burned out. If it is serious, there will be a fire, electric leakage will hurt people and even endanger their lives.
Under such conditions, the service life of stainless steel heating pipe is 1 year, that of copper alloy heating pipe is 2-3 years, and that of the best Ingrid 800 heating pipe is 8- 15 years. Why is the service life so different?
Huang Ming's technicians explained:
The common electric heating material is glass or common stainless steel electric heating tube; Under the same conditions (48 hours in 5% salt fog box), common electric heating in the market is easy to corrode rusty terminals or electric heating tubes. The material used is stainless steel, which contains very low chromium and nickel and is not resistant to corrosion. Stainless steel is not rustproof. It has a natural enemy, which is chloride ion. If the chloride ion content is slightly higher at high temperature, it will corrode the electric heating tube, rust over time, and the electric heating wire will leak out and soak in water (take the electric heating wire for example). Water contains a lot of calcium and magnesium ions. Under the condition of high temperature and high humidity for a long time, the electric heating tube will form scale, just like "heating quickly" inserted in a thermos. It will scale for a long time (there is scale in some places and there is no scale in some places), and the heat inside the electric heating tube cannot be conducted. At the same time, the temperature of the electric heating tube itself is very high, and the water will make up quickly in the part without scale. When the electric heating tube is gasified at high temperature, it will form pressure, which will break down after a long time, and the electric heating wire will leak out, resulting in water electrification. Dry-burning on a dry-burning table for about ten minutes will burn out the electric heating tube or resistance wire. If you forget to unplug the power when you go to work or go on a business trip, there is no time to react, so not only can you not guarantee the service life and use effect, but it is also an inevitable disaster to crack and catch fire.
Himin Power Plus uses high-quality Ingrid 800:
The high chromium and high nickel stainless steel used in oil drilling industry has a corrosion-resistant nickel-chromium content of 55%. Under the same conditions (48 hours in 5% salt fog box), the terminal or electric heating tube is not corroded. Dry-fired on a dry-fired bench, this high-chromium and high-nickel stainless steel used in oil drilling industry has a nickel-chromium content as high as 55%, can withstand the corrosion of chloride ions at high temperature, and can withstand dry-fired for three days, three nights and 72 hours, which is three times as high as the electric heating standard of ordinary electric water heaters. If you forget to unplug the power when you are at work or on a business trip, you have enough time to react. Generally, this electric heating tube has a 70-degree automatic power-off temperature control switch, the second one has a 1 10-degree dry-burning automatic power-off, and the third one has a leakage protection plug. The breaking time is less than 0. 1 s, and the contact resistance is: 10000 times, ensuring the service life and use effect.