Electric heater with dry-burning identification function and dry-burning identification method thereof

Abstract

The invention proposes a dry-burning identification method for an electric heater. The method includes the following steps: after the electric heater carries out a heating work, the heating temperature of the electric heater is detected in a real-time manner; when the heating temperature is higher than a first preset temperature, a timer in the electric heater begins timing; and according to a timing time of the timer and the heating temperature which is detected in a real-time manner, whether dry burning of the electric heater exists is judged. The dry-burning identification method of the electric heater is capable of identifying the dry-burning state of an electric heater and preventing a safety problem caused by drying burning of the electric heater and overly high temperature. The invention also proposes the electric heater with a dry-burning identification function at the same time.

Description

technical field [0001] The invention relates to the technical field of electric heating, in particular to an electric heater with a function of identifying dry heating and a method for identifying dry heating of the electric heater. Background technique [0002] At present, in order to prevent problems such as dry burning, fuse damage or overheating caused by overheating or continuous heating during the working process, electric heaters usually set two control temperatures during the working process, such as figure 1 As shown, that is, the heating on temperature Ton and the heating off temperature Toff, when the heating temperature exceeds Toff, the electric heater will stop heating, and when the heating temperature is lower than Ton, the electric heater will restart heating. In order to achieve the purpose of preventing dry burning. However, in order to ensure the usable range of the product, Toff is generally set higher. If the power of the electric heater is large and th...

AI Technical Summary

Problems solved by technology

However, in order to ensure the usable range of the product, Toff is generally set higher. If the power of the electric heater is large and the thermal inertia is also large, when the heating temperature of the electric heater reaches Toff, the heating will stop, but the heated body will still Affected by the thermal inertia of the electric heater, the heating temperature will continue to rise by a large margin, even to the highest temperature Tmax, which exceeds the acceptable safe temperature Topen of the heated body, which may easily cause dry burning, or be caused by the heater The heating temperature is too high to cause a fire, or burn the safety device to cause a safety accident

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