Over-temperature protection device with over-temperature protection and highest-temperature permanent cut-off circuit

Abstract

The invention belongs to the technical field of over-temperature protection, and particularly relates to an over-temperature protection device with over-temperature protection and a highest-temperature permanent cut-off circuit. The device comprises a device shell, a thermal link, a thermal protector, a first electrode and a second electrode; a thermal link installation cavity and a thermal protector installation cavity are integrally formed in the device shell, the thermal link and the thermal protector are fixedly installed in the thermal link installation cavity and the thermal protector installation cavity respectively, and the sealing structure is installed in a left port of the device shell through a sealing installation groove and a sealing rib. And one end of the first electrode passes through the mounting through hole of the sealing structure and is connected with a metal pin II. The thermal protector and the thermal link are serially connected and assembled in the shared shell, one pole of the thermal protector and one pole of the thermal link are used as input and output poles of the over-temperature protection module with temperature control protection and a maximum temperature permanent cut-off circuit, and the over-temperature protection device has the characteristics of consistent temperature sensing effect of the thermal protector and the thermal link and convenience in installation and replacement.

Description

technical field [0001] The invention belongs to the technical field of over-temperature protection, and in particular relates to an over-temperature protection device with over-temperature protection and permanent cut-off circuit at the highest temperature. Background technique [0002] PTC heater is also called PTC heating element, which is composed of PTC ceramic heating element and aluminum tube. This type of PTC heater has the advantages of small thermal resistance and high heat exchange efficiency. It is an electric heater with automatic constant temperature and power saving. It is composed of galvanized outer pressure plate, stainless steel corrugated spring piece, galvanized inner pressure plate, single-layer aluminum heat sink, PTC heat sink, double-layer aluminum heat sink, nickel-plated copper electrode terminal and PPS high-temperature plastic electrode sheath. Due to the use of U-shaped corrugated heat sink, the heat dissipation rate is improved, and the advanta...

AI Technical Summary

Problems solved by technology

However, thermal protectors and thermal fuses are usually provided by different manufacturers. They are installed on different positions of the PTC heater, and the temperature sensing effects are not synchronized. They need to be installed separately, and the installation and use are not very convenient.

Images