Contact type temperature sensor applied to surface mounting

Abstract

The invention discloses a contact type temperature sensor applied to surface mounting. The contact type temperature sensor comprises an inverted-U-shaped metal cover, an NTC chip and a plastic base and is characterized in that a polyimide film is arranged at the top end inside the metal cover, the plastic base is arranged inside the metal cover, a cavity is arranged inside the plastic base, a silica gel pad is arranged inside the cavity, a support is arranged on the silica gel pad, the NTC chip is connected to the top of the support, wires are arranged below the silica gel pad, and the wires penetrates the silica gel pad to be electrically connected with the NTC chip at the top of the support. The contact type temperature sensor has the advantages that the sensor is high in temperature measuring precision, fast in response, stable in temperature measuring consistency and capable of reflecting the real temperature of a pot to the maximum extent, and the performance of the sensor is muchhigher than that of traditional same-type sensors.

Description

technical field [0001] The invention relates to the technical field of temperature sensors, in particular to a contact temperature sensor applied to surface mounting. Background technique [0002] A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument, and there are many varieties. According to the measurement method, it can be divided into two categories: contact type and non-contact type. According to the characteristics of sensor materials and electronic components, it can be divided into two types: thermal resistance and thermocouple. [0003] At present, the metal shell of the external temperature sensor such as the traditional induction cooker and the rice cooker is closely attached to the plastic base, such as figure 1 As shown, the position of the chip is also relatively close to the position of the base. After the metal shell absorbs heat,...

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Problems solved by technology

[0003] At present, the metal casing of the external temperature sensor such as the traditional induction cooker and the rice cooker is closely attached to the plastic base, such as figure 1 As shown, the position of the chip is also relatively close to the position of the base. After the metal shell absorbs heat, part of the heat is transferred to the plastic base. The chip fails to be heated and sensed in time, resulting in poor accuracy of NTC temperature measurement, slow response speed and consistent temperature measurement. Unstable, can not accurately reflect the temperature of the pot body

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