Range hood and control method thereof

Abstract

The invention relates to a range hood and a control method thereof. The control method comprises the following steps: (1) a first stable value of a gas sensor after primary electrification is set as an operation reference value a; a maximum valve value of the gas sensor is Ma; a minimum valve value of the gas sensor is ma; Ma=a+c; ma=a+d; and c is bigger than d; (2) the gas sensor detects an air environment in a smoke collecting cavity in real time; a detected real-time value b is sent to a controller; and when a variation delta b of b within t1 time is bigger than s, the controller sends an instruction to start a fan; and (3) when b is not smaller than Ma, the controller sends an instruction to enable the fan to increase the rotating speed; when Ma is bigger than b, and b is bigger than ma, the controller sends an instruction to reduce the rotating sped of the fan; and when b is not bigger than ma, the controller sends an instruction to stop the work of the fan. The control method uses the gas sensor for detecting in real time, uses the first stable value of the gas sensor after primary electrification as the operation reference value, overcomes the shifting problem of the gas sensor, and realizes automatic and precise control of the range hood.

Description

Technical field [0001] The invention relates to the technical field of kitchen appliances, in particular to a range hood and a control method thereof. Background technique [0002] Generally, the control of the range hood needs to be controlled by pressing the buttons by human hands, and with the subjective will of people to control. When people are cooking, they are usually busy or have ingredients in their hands and cannot push the switch of the range hood, or the operation is not smooth, and the operation is inconvenient; and human instinct cannot make accurate air environment Timely judgment, such as gas leaks, flue smoke, etc., can not realize the timely opening and closing of the hood, which affects the air quality in the kitchen and threatens personal safety. The commonly used gas sensors have serious drift problems and cannot accurately feedback the air environment. At present, in actual use, they cannot be applied to the automatic control of range hoods. Summary of the...

AI Technical Summary

Problems solved by technology

When people are cooking, they usually cannot press the switch of the range hood when their hands are busy or they have ingredients in their hands, or there are operational problems such as unsmooth pressing, which makes the operation inconvenient; Timely judgment, such as gas leakage, flue smoke and other phenomena, so that the timely opening and closing of the hood cannot be realized, affecting the air quality of the kitchen and threatening personal safety

However, the commonly used gas sensor has a serious drift problem and cannot accurately feed back the air environment. At present, it cannot be applied to the automatic control of the range hood in actual use.

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