Alarm device of oil filter

Abstract

The invention relates to an alarm device and aims to provide an automatic alarm device of an oil filter used by an internal combustion engine. The alarm device is structured as follows: an A / D converting unit and a control unit are sequentially connected with a driving alarm device through wires; a differential pressure transducer and a temperature sensor are respectively connected with the A / D converting unit; the differential pressure transducer comprise two impulse tubes which are respectively connected in the site of an oil inlet pipe of the oil filter and an oil outlet pipe of the oil filter; and the temperature sensor is installed in the site of the oil inlet pipe of the oil filter. The automatic alarm device has the functions of triggering the alarm in the bypass manner and in the breakdown manner; the alarm device can give an alarm both acoustically and optically so as to ensure operators can really receive an alarm signal; the automatic alarm device of the oil filter has the advantages of high alarm accuracy, good adaptability, small volume, flexible arrangement, and easy promotion; and the automatic alarm device can set different preset values according to different oil filters.

Description

technical field [0001] The invention relates to an alarm device, in particular to an automatic alarm device for an oil filter for an internal combustion engine. technical background [0002] In internal combustion engines, engine oil has many functions such as reducing friction, improving power, buffering collisions, reducing vibration, sealing cylinders, reducing air leakage, cooling overheated parts, cleaning the interior of the engine, etc., and the oil filter is exactly these functions. Guarantee, it can filter the engine oil to ensure that the engine oil is clean, so as to protect the engine and prolong the service life of the engine. [0003] Typically, filter replacement is either based on engine mileage or filter working hours. However, due to different use conditions and environments, it will inevitably lead to wrong time to replace the filter element, resulting in waste or machine damage. During the use of the engine, mechanical impurities such as dust, metal wea...

AI Technical Summary

Problems solved by technology

[0004] Existing alarm devices or maintenance indicators are either complicated in structure and require substantial modification of the existing filter device, or have imperfect functions and can only display the opening state of the bypass valve but cannot provide a breakdown alarm, or often false alarms cannot be replaced. Distinguishes the transient opening state of the bypass valve due to engine cold start or pressure fluctuations, etc.

In short, not a good and accurate display of filter status

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