Cast aluminum heater refers to the main element of the thermoelectric water heater, the material of the heating element is a heater die-cast by tubular electric heating elements and metal aluminum. Based on the increasingly exposed defects of the traditional heating method of instantaneous electric water heaters, another cast aluminum heating technology has appeared on the market - 3D MAX integrated ultra-fast heating system, that is, three-dimensional molding, alloy aluminum integral casting.
3D MAX integrated extreme heating system is an integrated heating system developed by technicians through years of efforts to combine the advantages of various instantaneous heating technologies, and the instantaneous electric water heater heating technology has been improved and improved. It has been recognized by the industry and obtained a number of national patent technologies. The waterway is completely isolated from the heating element, and the water gradually heats up in the process of flowing in the pipeline, which is a low-temperature circulation flow of "living water" heating principle, which avoids the scale problem caused by high-temperature hydrostatic heating, and theoretically does not produce scale at all; It has the advantages of long life and corrosion resistance.
1. Principle of thermal conduction: the heat source generated by the electric heating device is quickly conducted to the overall cast metal filler through the pipe wall (metal materials have very fast thermal conductivity), so that the temperature of the entire metal body is evenly dispersed, reduce the temperature within the unit area of the heating element, reduce the heat load of the heating element, and at the same time carry out heat exchange with all the water in the three-dimensional surrounding water flow channel to improve its thermal efficiency, due to the acceleration of the heat source dispersion speed while improving the thermal efficiency, but also slowing down the aging of the heater, controlling scale generation, Extend its service life;
2. The gap between the heating pipe and the water flow channel is filled with metal material casting, so the heating element and the surface of the waterway are completely isolated from the air, eliminating the possibility of surface oxidation, and the waterway is surrounded by stainless steel whole pipe, without joints, welding joints and welds, completely eliminating the risk of water leakage and erosion caused by welding. (water-stainless steel water flow channel pipe wall-integral casting filling layer-heating pipe wall-insulation layer-heating element) its structure completely eliminates the contact between water and the electric heater element, even if the water pipe or electric heating pipe is ruptured, the electric heating device will not be damped or in contact with water, so as to realize the separation of water and electricity in the true sense;
3. The heater size is 240mm×100mm×30mm, the heater water flow channel is made of a stainless steel pipe with a total length of nearly 6000mm around 11 turns, each circle length of 520mm, super long waterway, super large heat exchange area (pipe inner diameter 6.5mm×π×6000mm=125522mm2) greatly improves the heat conversion efficiency, the thermal efficiency is more than 99%;
4. The overall casting of metal material, its heater weight is 2.1kg, the withstand voltage is 2000V/<0.5mA/6s without breakdown, flashover, alarm, far exceeding the national standard durable pressure 1250V/ <5mA/3s no breakdown, flashover, alarm. Water pressure resistance above 10kg, at 1kg water pressure, heater outlet flow is 7L/min;
5. The inlet and outlet interface connector adopts high-pressure stamping interface, no welding welding joint, completely eliminates the problem of corrosion leakage of the traditional heater inlet and outlet due to welding, and uses movable joints to connect the inlet and outlet non-metallic water nozzle (safety insulation), when installing, disassembling and maintaining the water inlet switch and water outlet, it can be easily operated without disassembling the heater, the heater inlet and outlet adopts movable joints to adjust the center distance of the water inlet and outlet, which can be applied to any style (horizontal type) shell on the market;
6. The heating element port is located in the low temperature area on the right side of the heating body, and the terminal is dispersed to reduce its own heat and ensure safety; The terminal block adopts high-voltage stamping connection integration, which avoids the contact loss caused by welding, or the phenomenon of excessive heating caused by excessive heating of the terminal current caused by unstable welding. 1. Non-metallic heaters are commonly known as glass tube heaters or QSC heaters
The non-metallic heater uses a glass tube as the substrate, and its outer surface is coated with a layer of PTC material to become an electric heating film after sintering, and then a metal ring is added as an electrode on the two ports of the glass tube and the surface of the electric heating film to form a heating tube. So it is also called a glass tube heater.
Simply put, it is to plate a layer of conductive material on the outer wall of the glass tube, heat it by the high current on the outer wall of the glass tube, and then forcibly conduct heat to the water inside the glass tube.
2. It is based on glass tubes to achieve water and electricity isolation. The glass tube heater is composed of 4 to 8 glass tubes of different numbers according to different powers, and the two ends are tightened and sealed with plastic parts and extended bolts. Generally, 8000W power machines use 1000W or 2000W glass tubes each. 1. Crystal is a crystal of silica, and it is even more impossible to make heating tubes. Because he is a crystal, it cannot withstand high temperature impact, and when the high temperature rises to about 573 °C, it will expand and burst sharply into other crystal metamorphosis, and cannot be thermocast at all.
2. Crystal is a natural mineral, generally accompanied by other impurities, and due to the different impurity elements and quantities contained in different colors, there is basically no single color or color transparent.
Crystal has high hardness and brittleness, and is processed by the method of chiseling, grinding and polishing, which is difficult to process and cannot be made into a tube. Glass crystal tube long-term in high temperature and high pressure, heat rise and cold contraction environment, easy to break and leak, and glass tube heater is by the glass tube surface coating heat, once leakage will inevitably leak electricity. The temperature is concentrated on the surface of the glass tube, so that the inner wall is prone to scale, scale affects heat exchange, so after a period of use, the thermal efficiency decreases, and the possibility of bursting the pipe increases. In addition, the end leakage is also the biggest defect of the glass tube heater, the connection between multiple glass tubes, relying on the end cover and sealing rubber ring at both ends, with bolts to fix the end cover to seal the rubber ring, this structure is fixed, too much force directly crushes the tube, the force is too small, poor sealing leads to water leakage.
1. Low thermal efficiency and more power consumption
Since the heat exchange is done through a 4 mm thick glass tube, and the thermal resistance of glass is much greater than that of metal materials, the temperature of the inner wall of the glass tube is lower when heated, which reduces the heat exchange rate.
Because the glass tube is heated from the outside to the inside, the heat energy is lost a lot, and the thermal efficiency is less than 80%. The SOAI 3D heating system adopts a fully enclosed waterway from the inside to the outside for heating, which has high heat absorption and very little waste, and the thermal efficiency is very high.
2. The conductive coating is fragile, easy to fall off and damaged
Due to technical limitations, uneven surface of the electric heating film and burrs at the edge of the metal ring, the fitting rate is only 40%, and the rest are gaps filled with moisture. The metal ring is slowly oxidized after working in a humid environment for a long time, and the grounding resistance between them also increases, and when it reaches a certain extent, it is scrapped due to the burning of the electric heating film. The conductive coating must be uniform and once broken, it can no longer be used.
3. It is easy to crack or crack, resulting in leakage
(1) When the glass is heated by the outer wall, the temperature on the outside of the tube wall is extremely high and the temperature of the cold water inside the tube is low, and the inside of the glass tube shrinks and expands, resulting in great distortion stress, resulting in the bursting of the glass tube. Even if it does not burst, it will shorten the service life.
(2) The glass tube has high hardness, but small toughness and limited pressure-bearing capacity. When steam appears inside, the glass tube breaks as a result. During transportation or installation, it is easy to break due to collision and excessive vibration.
(3) Once the glass tube is exploded or cracked, there will be water leakage during use, and the current on the outer wall of the glass tube is connected to the water in the glass tube, so that the water is charged and endangers life safety.
4. Short continuous boot time
The product heated by glass tube can have a short continuous start-up time. Generally, after 20 minutes of use at most when the machine is turned on, the shell of the water heater will be hot, so it needs to be shut down for 10 minutes to continue to use. SOAI water heaters will not be used continuously for a long time.
5. The effect of multi-channel and multi-point water supply is poor
The pressure-bearing capacity of the glass heater is poor, and if the water supply is multiple, it is easy to cause the glass tube to burst.
When the water is turned off after use, the temperature inside the machine will rise instantly, the pressure of the glass tube will increase, and the machine will make a lot of noise, which will reduce the service life.
6. The power will naturally attenuate and the service life will be short
(1) PTC electric heating film begins to attenuate after a period of work, and the power of the conductive coating will decrease by 5%-10% every year, and the power will decrease significantly. Under normal circumstances, non-metallic heaters can no longer work properly after 2 years of use.
(2) The heater is subjected to alternating cold and hot during work, and the thermal expansion and contraction of the two materials and the speed are inconsistent, causing the electric heating film to be pulled off along the axial direction and scrapped.
7. Machine parts have a short service life
Due to the use of external heating, the heat energy is lost, and the lost heat energy affects the transformer, computer motherboard, and wire of the water heater for a long time, resulting in a short service life of electrical components.
The interface between glass and glass can only be connected with plastic. When bathing, the plastic is high temperature for a long time, and the maximum temperature of the end can reach 300 degrees when heating. After thermal expansion and contraction, it is easy to age, and then the interface between the glass will leak water, resulting in leakage, and accidents will occur.
8. Due to technical bottlenecks, there is no three-phase electric water heater
Due to the limited glass tube heating technology, poor process technology, and immature product technology, there is no way to produce three-phase electric water heaters, and the product line is short.
9. High retreat rate and high maintenance rate in winter
Because of its low thermal efficiency, one-third of the heat energy is wasted, so the retreat rate of glass tube machines in winter is very high, and there are few repeat customers.
Due to technical limitations, its maintenance rate is high, and the glass tube is extremely easy to leak after maintenance, so the replacement machine is not maintained.
10. Use toxic asbestos as insulation material
The insulation material wrapped outside is made of asbestos as raw material, and this material is no longer used as thermal insulation material internationally, because this material will release a large number of toxic gases in the process of heating, and the second material is the main attraction of lung cancer.
However, due to the cheap price of asbestos, many irresponsible enterprises still use asbestos as a heating body insulation material.
