Non-contact control device for extractor hood and control method

Abstract

The invention relates to a non-contact control device for an extractor hood and a control method. The non-contact control device comprises two sets of infrared gesture sensing devices arranged on a shell of the extractor hood and a detection signal analysis device connected with the two sets of infrared gesture sensing devices, and each infrared gesture sensing device comprises an infrared receiving device and at least one infrared emitting device. The device and the device are characterized in that the distance L between the infrared receiving devices in the two sets of infrared gesture sensing devices satisfies the formula that H*tan(theta)+H*tan(beta)+W_min(L(H*tan(theta)+H*tan(beta)+W_max. Compared with the prior art, the device and method have the advantages that through design of thepositions of the two sets of infrared gesture sensing devices, the user gesture sensing distance does not need to be controlled according to the intensity of infrared emission signals, adjustment ofthe intensity of the infrared emission signals can be facilitated, it is ensured that the infrared receiving device can better detect infrared signals, and meanwhile, mutual interference of gesture operation signals within the maximum sensing distance can be achieved.

Description

technical field [0001] The invention relates to a non-contact control device and control method of a range hood. Background technique [0002] At present, most range hoods on the market are operated by touch, but due to the special environment of kitchen work, when the user's hands are covered with oil or flour, or clean hands are not willing to operate the buttons covered with oil Therefore, the touch operation has brought a lot of troubles to the users of kitchen appliances. [0003] In the prior art, although there are some non-contact control methods for range hoods using infrared signals, they basically control the sensing distance by controlling the intensity of infrared signals, and at the same time control the speed of gesture sliding to avoid human interference, especially the head. interference from the department. In addition, the gesture of waving left and right is simply judged according to the time sequence in which signals are received by different infrared ...

AI Technical Summary

Problems solved by technology

These control methods also lack scientific design for the position distribution of infrared transceiver devices. Unscientific distribution may cause a group of infrared receiving devices to receive signals transmitted by other groups of infrared emitting devices. In this case, according to the time when the signal is received Judging the operation gestures in sequence is prone to misjudgment

At the same time, the control method in the prior art does not really analyze the difference between the gesture operation and the interference signal, and it is difficult to judge the validity of the detection signal.

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