Detection device for fixing apparatus state and image formation device

Abstract

The invention relates to a detection device for fixing apparatus state and an image formation device with the detection device. A central temperature sensor and an end part temperature sensor are respectively disposed at the central area and an end part area of a fixing roller of an image formation device; the detection device calculates a central blending temperature, an end part blending temperature and a blending temperature difference according to the central temperature and the end part temperature detected by the central temperature sensor and the end part temperature sensor, and performs blending temperature difference determination and continuous determination of a central blending temperature threshold, so the fixing apparatus can work normally in a certain range below the lower limit of the specified power supply voltage, which prevents the problem that current image formation devices are easy to misreport fixing apparatus failure when an actual power supply voltage is lower than the lower limit of the specified power supply voltage, and facilitates user time saving and reduction of manufacturer after-sales maintenance cost.

Description

technical field [0001] The invention relates to a fixing device status detection device and an image forming device. Background technique [0002] A fixing roller with a built-in heat source is attached to an image forming apparatus such as a printer, a facsimile machine, or a copier. After receiving the printing instruction, the image forming device starts to energize the heating source to preheat the fixing roller. During the preheating process, the temperature on the surface of the fixing roller will rise, and the temperature rising speed can be expressed by the rising value of the surface temperature of the fixing roller within 1.5s, that is, the matching temperature. Under the standard voltage of 220V stipulated in our country, if the heating source and the temperature detection device of the fixing roller are not faulty, the matching temperature of the fixing roller can reach above 7°C. If the matching temperature is less than 7° C., the image forming device will det...

AI Technical Summary

Problems solved by technology

The fixing device status detection device and the image forming device of the present invention solve the problem that the existing image forming device is prone to misreporting the fault of the fixing device when the actual power supply voltage is lower than the lower limit of the specified power supply voltage, which is beneficial to save the user's time and reduce the manufacturer's after-sales maintenance cost

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