A waterproof and moisture-proof temperature sensor

Abstract

The invention belongs to the technical field of electronic components, and provides a water-proof and damp-proof temperature sensor, which includes a thermosensitive chip placed in a casing and a connector placed at the outer part of the casing, wherein the thermosensitive chip and the connector are connected through PVC sheathed lines; the thermosensitive chip is provided with three silica gel sealing layers; the thermosensitive chip is wrapped with the first silica gel sealing layer in a sealing manner, and then is wrapped, sealed and solidified by epoxy encapsulating material; the thermosensitive chip, pins and welding points of the thermosensitive chip and the pins with the PVC sheathed lines are wrapped with the second silica gel sealing layer in a sealing manner, and then are wrapped, sealed and solidified by epoxy encapsulating material; the third silica gel sealing layer extends to a protective sheath of the PVC sheathed lines, so as to wrap and seal a sensing head of the entire sensor. Epoxy potting compound is filled in the casing in a sealing manner, and the seal is realized through three layers of silica gel, so that the problem that the testing accuracy and service life are influenced as the temperature sensor is in a damp environment for a long time is solved; as the silica gel seal is adopted, the water-proof and damp-proof temperature sensor is anti-aging, resistant to high temperature, and excellent in water-proof, damp-proof and anti-aging effects, ensures the service life, and can be widely applied in the field of electronic products.

Description

technical field [0001] The invention belongs to the technical field of electronic components, and in particular relates to a waterproof and moisture-proof temperature sensor. Background technique [0002] With the continuous development of society, all kinds of electrical equipment and smart home are used more widely, and the geographical environment of each application is different. Therefore, it is required that each electrical equipment and smart home can work in various environments, especially in humid environments. This requires various electronic components to be moisture-proof and moisture-proof. As a temperature sensor for temperature protection, detection, and compensation in electrical equipment and smart home products, the requirements are more stringent, so as to achieve accurate detection, protection, and control of the temperature of the working environment. role. [0003] Such as figure 1 As shown, the current temperature sensor includes a thermosensitive c...

AI Technical Summary

Problems solved by technology

The migration of silver ions not only occurs on the surface of the inorganic medium, but also diffuses into the interior of the inorganic medium, causing the distance between the electrodes to decrease and the resistance value to decrease. In severe cases, the two silver electrodes can be completely short-circuited, affecting the temperature sensor. The accuracy of the temperature sensor cannot meet the requirements of the temperature sensor for the detection of the environment, the protection and control of the circuit, etc.

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