Pressure detection system and electric pressure cooker

Abstract

The invention discloses a pressure detection system used in an electric pressure cooking utensil. The pressure detection system comprises a displacement element, a pressure sensor and a controller, wherein the displacement element generates displacement in response to pressure in the electric pressure cooking utensil; the pressure sensor makes contact with the displacement element and converts the displacement of the displacement element into a pressure detection result; the controller is electrically connected with the pressure sensor, receives a first detection result, generated by the pressure sensor, of first pressure and compares the first detection result with a preset range, and if the first detection result belongs to the preset range, the first detection result is set to be zero through the configured pressure sensor, and when the pressure sensor detects the first pressure in the following process, the result of zero is output. The invention further discloses the electric pressure cooking utensil with the pressure detection system.

Description

technical field [0001] The present invention relates to pressure detection, in particular to a pressure detection system; in addition, the present invention also relates to an electric pressure cooker including the pressure detection system, such as an electric pressure cooker. Background technique [0002] Chinese patent CN1763487A disclosed a pressure detection method for an electric pressure cooker on April 26, 2006, which is characterized in that: a strain gauge is used as a detection device, and the strain gauge is placed at a certain position in the space between the outer shell of the pressure cooker and the inner pot , and use a transmission arm to sense the expansion of the inner pot; when the inner pot expands due to high pressure, the transmission arm converts the expansion of the inner pot into a displacement, and pushes the elastic matrix of the strain gauge to deform accordingly; the deformed strain gauge is elastic The substrate changes the electrical properti...

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Problems solved by technology

[0003] Although the above-mentioned patents introduce the use of strain gauges as a method of detecting pressure, they only propose a way of thinking, and there are many inconveniences in actual use. consistency, and did not propose how to eliminate the influence of the error caused by the stability on the pressure value

[0004] When using the above structure and using electronic components such as displacement sensors and pressure sensors for continuous pressure detection, the problem of inaccurate initial pressure values ​​is faced, especially in mass production, due to the manufacturing errors and assembly errors of the components themselves. It is necessary to add initial adjustment, fine adjustment and other positions in the production line to control, not only the production efficiency is low, but also due to the instability of manual debugging, it is still difficult to ensure that the pressure control of each product is consistent

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