Sensor

By creating grooves at the bottom and sides of the sensor housing chamber, the stress problem caused by temperature changes and refrigerant pressure in the ceramic pressure-sensitive core is solved, thereby improving the long-term stability and accuracy of the sensor.

CN223581256UActive Publication Date: 2025-11-21ZHEJIANG YINLUN MACHINERY
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Patent Information

Application Number
CN202520332827.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-27
Publication Date
2025-11-21
Estimated Expiration
2035-02-27

AI Technical Summary

Technical Problem

Existing pressure sensors are prone to compressive stress at the contact surface between the ceramic pressure-sensitive core and the outer shell under temperature changes and long-term use, leading to abnormal pressure sensing.

Method used

A groove is made at the bottom and/or side of the sensor housing chamber to allow the deformation of the core caused by temperature changes and refrigerant pressure to be released through the groove, thus avoiding thermal stress and compressive stress between the core and the housing.

Benefits of technology

It effectively counteracts the stress between the core and the outer shell, improves the sensor's lifespan and detection accuracy, and avoids abnormal pressure sensing.

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Abstract

The utility model relates to the technical field of pressure sensing, in particular to a sensor. A sensor comprises a core body and a shell, and the shell is provided with a cavity for installing the core body. The top and the bottom are oppositely arranged in the height direction X of the cavity, and the side portion is located between the top and the bottom. The top part is open, and grooves are formed in the bottom part and / or the side parts; and the groove extends towards the direction far away from the core body. Provided is a sensor that does not easily sense abnormalities after long-term use.
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