A vertical resistance sensor

Abstract

The invention relates to the technical field of temperature control sensors, in particular to a vertical resistance sensor. Including the base, the upper end of the base is provided with an upper cover that moves up and down relative to it, the base is horizontally and horizontally provided with a fixed plate, the fixed plate is provided with a limit mechanism that cooperates with the upper cover, and a micro switch is provided in the base below the fixed plate , the micro switch is set in linkage with the upper cover; a bracket that can move up and down is provided between the fixed plate and the upper cover, a thermistor that cooperates with the upper cover is provided on the bracket, and both ends of the bracket and the fixed plate are provided with return spring. The invention has a reasonable structure, the upper cover drives the action rod to make the micro switch send out a pot signal, and the upper cover touches the thermistor so that it communicates with the micro switch to activate overheating and power-off protection, and at the same time, the fuse protects the main control circuit from overcurrent; The independently acting upper cover reduces the deformation loss of the sensing part during frequent triggering, and improves the working stability and safety of the sensor.

Description

technical field [0001] The invention relates to the technical field of temperature control sensors, in particular to a vertical resistance sensor. Background technique [0002] Common anti-dry sensors on the market today include a mounting cup, a micro switch and a switch support plate. There is a return spring, and the switch support plate is fixed on the installation base plate. When in use, the installation cup moves down and the micro switch is connected to the heating circuit on the installation base plate. There are thermal components connected in series on the heating circuit. When the installation cup is released, the heating circuit is disconnected. . [0003] There are many problems in the use of the sensor with this structure. The anti-dry power-off device in the sensor and other fuse protection mechanisms are triggered by the up and down movement of the mounting cup. The anti-dry device and the circuit need frequent power on and off. Action, the anti-dry device...

AI Technical Summary

Problems solved by technology

[0003] There are many problems in the use of the sensor with this structure. The anti-dry power-off device in the sensor and other fuse protection mechanisms are triggered by the up and down movement of the mounting cup. The anti-dry device and the circuit need frequent power on and off. Action, the anti-dry device and the electrical parts of the circuit are close to each other, which is prone to arcing and surface oxidation, resulting in poor contact and overcurrent damage to the sensor; the working parts in the sensor require high assembly tolerances during assembly, resulting in overall The cost of structural mold opening is high and assembly is difficult; and the internal structure layout of the existing anti-dry burning power-off device is relatively compact, and the unreasonable structure setting leads to poor safety

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