Commercial appliance heating elements serve commercial places such as catering, hotels, beauty salons, etc., and need to cope with the scene requirements of long-term continuous operation, high-frequency use and large-load output. The core requirements are “high durability, stable power output and low maintenance cost”. Typical applications include commercial electric ovens, electric water heaters, commercial microwave ovens, ice machines, laundry dryers, etc., whose working intensity is usually several times or even dozens of times that of household equipment (for example, the average daily heating time of commercial electric water heaters can reach more than 12 hours).

In terms of material selection, commercial heating elements emphasize high temperature resistance, corrosion resistance and mechanical strength. For example, the electric heating tubes of commercial electric ovens are mostly wrapped with stainless steel shells (such as 304 stainless steel) to wrap nickel-chromium alloy heating wires, and the outer layer is coated with high-temperature resistant insulating glaze to cope with the high temperature environment of 200-300℃ in the oven and the corrosion of food oil stains; the evaporator heating elements of commercial ice machines need to use titanium alloy or copper materials to avoid salt water corrosion; the heating plates of large commercial electric water heaters often use thick film heating technology (such as ceramic thick film circuits) to reduce local thermal stress and extend life through large-area heating elements.

At the design level, commercial heating elements must meet the requirement of “continuous operation without attenuation”: for example, the heating tubes of commercial electric ovens must pass a high-temperature aging test of more than 48 hours to ensure that the power attenuation does not exceed 5%; the heating elements of commercial laundry dryers must be integrated with heat dissipation fins or forced air cooling structures to avoid overheating and damage to the components due to continuous high-power operation. In addition, commercial scenarios also have higher requirements for energy efficiency (for example, some countries require commercial appliances to achieve first-level energy efficiency), so the components need to optimize thermal conversion efficiency (such as reducing thermal bridge losses) and achieve precise temperature control through intelligent temperature control systems (such as PID algorithms) to avoid energy waste. A typical example is the heating element of a commercial electric frying stove, which needs to heat the pot to above 300°C within 3 minutes, and the power fluctuation is less than 3% after working continuously for 8 hours to meet the needs of high-intensity cooking.