The insulation area of the cooked food cabinet relies on an electric heating tube or a far-infrared quartz tube to maintain a constant temperature. The heating element works at high temperature for a long time, and the performance attenuation is a normal phenomenon.Routine inspections should be carried out in the cooling state of the equipment to observe whether the surface of the heating tube has cracks or deformation, and whether the terminal blocks have signs of oxidation and blackening.Use a multimeter resistance file to measure the on-off and insulation resistance at both ends of the heating tube, and the insulation value should be greater than two megohms.For water bath heating models, it is also necessary to check the water level and the adhesion of the scale in the heating pipe. If the scale is too thick, citric acid should be used for soaking and cleaning.The temperature sensor probe of the thermostat needs to be tightly fitted to the heating area, and loosening will lead to serious temperature control deviations.

The recovery of thermal insulation performance does not only depend on the heating element.The aging and hardening of the sealing strip is the primary factor in heat loss. A white paper clip can be used to test between the door frame and the door leaf, and the sealing strip needs to be replaced when it is easily drawn out.The loosening of the hinge causes the door leaf to sink, which will also destroy the sealing effect. Adjusting the hinge fixing screws can reset the door leaf.If the foamed layer of the cabinet shrinks and collapses due to long-term high temperature, it can be repaired by local injection of foamed material, but this operation requires professional tools and experience.In addition, reducing the frequency of opening doors in the insulation area and shortening the time of opening a single door are effective management methods to restore the insulation effect at low cost.

The heating element is like the heart of a cooked food cabinet and needs regular maintenance to maintain strong power.The spare parts warehouse of the enterprise should always have heating pipes of the same specifications so that they can be replaced quickly in the event of a sudden failure.The traditional resistance heating technology is mature and reliable, and the maintenance cost is low. As long as the daily inspection is in place, the insulation area can stably output a high temperature of more than 60 degrees all year round, guarding the best tasting temperature for every hot food.