Method for detecting temperature characteristics of thermoswitch

Abstract

The invention discloses a method for detecting temperature characteristics of a thermoswitch. The method comprises the steps of: arranging five oil grooves, namely an action upper limit oil groove, anaction lower limit oil groove, a reset upper limit oil groove, a reset lower limit oil groove and a detection oil groove, and ensuring that an oil temperature in the detection oil groove is 15-25 DEGC lower than an action lower limit temperature; putting the thermoswitch into the action lower limit oil groove, and keeping the temperature constant for 5-8 minutes; putting the thermoswitch into the detection oil groove, disconnecting a test contact to obtain a first batch of qualified thermoswitches, putting the qualified thermoswitches into the action upper limit oil groove, and keeping the temperature constant for 5-8 minutes; taking out and putting the qualified thermoswitches into the reset upper limit oil groove, and keeping the constant temperature for 5-8 minutes; taking out the thermoswitches, putting the thermoswitches into the detection oil groove, disconnecting the test contact to obtain a second batch of qualified thermoswitches, putting the second batch of qualified thermoswitches into the reset lower limit oil groove, keeping the temperature constant for 5-8 minutes, touching two binding posts of the thermoswitches by adopting a conductive probe, closing the test contact to obtain qualified temperature characteristics, and disconnecting the contact to obtain unqualified temperature characteristics. The detection reliability is high, and the labor intensity of operators is low.

Description

technical field [0001] The invention relates to a product quality detection method of a thermal switch, in particular to a temperature characteristic detection method of a thermal switch. Background technique [0002] The thermal switch includes a shell with an opening at the bottom, a bottom plate installed at the bottom of the shell, and bimetallic strips installed in a closed chamber formed by the shell and the bottom plate. Two terminal posts are usually installed on the bottom plate. After the thermal switch is energized through the terminal, when the temperature is over-current, the thermal switch will open the contact to cut off the power supply. After the current temperature returns to normal, the thermal switch will reset to close the contact to turn on the power. The thermal switch has an operating temperature such as 100-120°C, 100°C is the lower limit temperature of the thermal switch, 120°C is the upper limit temperature of the thermal switch, and the thermal sw...

AI Technical Summary

Problems solved by technology

This detection method has the following two defects: on the one hand, since the thermal switch is in an environment close to or equal to its action temperature or reset temperature when the conductive probe is used for detection in each oil tank, the conductive probe Any slight touch may cause the switch to move or reset in advance, resulting in misjudgment and greatly affecting the reliability of the detection; Moreover, the conductive probe detects a large number of touches, which further reduces the reliability of detection.

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