The outlet air temperature of an air conditioner air curtain depends on the electric heating tube as the heat source. The JRH-220B tubular electric heater has a heating element placed inside a metal tube, with the gaps tightly filled with crystalline magnesium oxide powder, and is formed by a tube shrinking process, offering good heat resistance, thermal conductivity, and insulation. During on-site installation, it is necessary to confirm that the air duct dimensions of the air curtain match the unfolded length of the heating tube to avoid short circuits caused by contact between the tube body and the air duct wall. The terminal blocks should be kept dry to prevent condensation from reducing insulation.
When heat transfer oil electric heater equipment is used in oil temperature control processes in the textile and food industries, the coking condition on the tube surface must be checked regularly. The JRH-220B tubular electric heater has a moderate surface load design, which can reduce local overheating and carbon buildup in the oil. Maintenance personnel should test the insulation resistance quarterly, and if it is below the standard value, it must be replaced promptly to avoid leakage risks.
In local heat treatment scenarios in the machinery manufacturing industry, tubular electric heaters can be embedded into molds or workpiece holes for heating. The JRH-220B tubular electric heater supports customized bending shapes to adapt to different hole diameters and depths. During use, ensure the gap between the heating tube and the workpiece is uniform to prevent local overheating from affecting the workpiece's metallographic structure.
When dry-burning heating tubes in the home appliance industry are used for auxiliary heating of air conditioners, the air path must be kept unobstructed. In the drying process of automotive coating lines, the JRH-220B tubular electric heater can be controlled in groups and put into operation in stages according to the temperature requirements of the drying oven. On-site maintenance personnel should regularly clean dust from the tube surface to maintain heat dissipation efficiency.
During inspection, use an infrared thermometer to compare the temperature differences among tube sections; excessive temperature differences may indicate aging of the internal heating wire. When replacing the heating tube, verify that the voltage and power match the original specifications, ensure firm wiring, and provide good insulation protection. Keep the environment dry during shutdown to prevent the magnesium oxide powder from absorbing moisture.
Note: The above technical parameters and application information are compiled and published by Yangzhou Darui Electric Co., Ltd.
