Temperature sensing assembly used for detecting surface temperature of induction cooker and mounting method thereof

Abstract

The invention discloses a temperature sensing assembly used for detecting the surface temperature of an induction cooker and a mounting method thereof. The assembly comprises a thermistor body and two leads, wherein each of two ends of the thermistor body is connected with a straight pin; the thermistor body and the two straight pins are all positioned on a silicone stopper at the center hole of a coil panel and are in a horizontal state; each lead is respectively riveted or welded to one straight pin on each of two ends of the thermistor body; the two leads downwards pass through the inner cavity of the silicone stopper in a compact district of magnetic lines of force and are connected to a temperature signal processing unit on the circuit board; the thermistor body of the assembly and the short straight pins are positioned in a horizontal state so as to completely avoid influence on a cooker surface temperature sampling signal by eddy effect caused on the vertical section part of a long pin of the traditional thermistor by the magnetic lines of force generated by the coil panel; and the cooker surface temperature signal sensed by the same thermistor body part is more accurate.

Description

technical field [0001] The invention belongs to the technical field of electronic components and applications, in particular to a temperature sensing component specially used for measuring the temperature of the surface of an induction cooker and an installation method thereof. Background technique [0002] The surface temperature of the induction cooker is an important safety control parameter. The existing induction cooker has the problem of inaccurate temperature measurement. Different coil plates and different heated pots often have a difference of 10-50°C in temperature measurement. [0003] Through a lot of experiments, we have found out the key reason: because the thermistor (NTC) used for temperature measurement usually uses pins made of materials that can be heated by electromagnetic, such as iron pins, due to production process problems Wait. like image 3 , the existing thermistor is composed of a thermistor part 6 and a material pin 5 that can be electromagnetic...

AI Technical Summary

Problems solved by technology

Since the vertical section 5' of the pin 5 is parallel to the magnetic field lines 10 generated by the coil disk, the magnetic field lines of the coil disk generate a large eddy current effect on the vertical section 5' of the thermistor, causing the pin to be heated. As a result, the sampling error of the temperature signal increases

[0004] In addition, the magnetic line density at the center of different coil disks is different, and different cookware will also cause changes in the density of the magnetic force line at the center of the coil disk, so different coil disks or different cookware will also cause large differences in temperature measurement

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