Intelligent range hood

Abstract

The invention discloses an intelligent range hood. The intelligent range hood comprises a check valve capacitor unit, an information processing unit, a main control unit and a motor driving unit, wherein the check valve capacitor unit, the information processing unit, the main control unit and the motor driving unit are connected in sequence; the check valve capacitor unit generates different capacitance according to the opening and closing states of a check valve; the information processing unit collects the generated capacitance and converting the capacitance into a rectangular wave; the main control unit collects the frequency of the rectangular wave and the running state of the current range hood, judges the opening and closing states of the current check valve in real time according to the frequency size and the running state of the rectangular wave and generates different control signals according to different opening and closing states; and the motor driving unit drives a motorto operate at different gears according to different control signals so as to automatically adjust the opening and closing states of the check valve when the opening and closing states of the check valve is detected to be abnormal. According to the scheme, the intelligent range hood has the advantages that the opening and closing states of check valve blades can be accurately detected, the workingstate of the range hood can be accurately judged in real time, and the automatic respiratory function of the range hood can be achieved.

Description

technical field [0001] Embodiments of the present invention relate to cooking equipment design technology, especially to an intelligent range hood. Background technique [0002] At present, the intelligent control methods of range hoods on the market are as follows: [0003] 1. Use the smoke sensor to realize the automatic control of the range hood. The automatic range hood detects the oil fume generated by cooking through the smoke probe installed in the machine and sends a signal to a controller, which controls the start-up of the fan operation and the speed regulation of the fan. During cooking, the fan can adjust and change the speed in real time according to the concentration of oil fume detected by the smoke detector, so as to achieve the best effect of sucking and exhausting oil fume. The smoke probe of this automatic range hood has hysteresis in detecting oil smoke. In addition, the automatic range hood completely eliminates the original button operation of manually...

AI Technical Summary

Problems solved by technology

The smoke probe of this automatic range hood has hysteresis in detecting oil smoke. In addition, the automatic range hood completely eliminates the original button operation of manually switching gears, and only has an automatic induction working mode, and the cost is very high. about ten yuan;

[0004] 2. Use a series of sensors or a combination of detection circuits to realize automatic control; for example, at present, many wind pressure sensors are added to the air outlet of the check valve, and the motor current detection or motor speed measurement device is used to realize the intelligent control of the range hood. For these There is stacking and accumulation of technologies in the control methods, and the installation structure becomes very complicated. The feasibility and reliability of the actual product gradually decrease with the increase of system modules, and the cost is even more expensive;

[0005] 3. Use program control to simulate the smoke volume curve of cooking, then simulate the time interval of each stage according to experience, and then use the timing unit to judge the motor running speed in each time period. If such an operation encounters air duct blockage or other conditions , the smoke machine cannot make a timely judgment, resulting in poor smoking effect and affecting the user experience;

[0006] 4. Use the hardware circuit to detect the change of the motor current in real time; the current conventional method is to add a transformer on the power board to detect the motor current, but in practical applications, due to the fluctuation of the grid voltage, the sampling value of the system also occurs Larger changes, coupled with the low detection accuracy of the current between the various gears, the system may not be able to accurately judge when the cigarette is blocked, which will affect the use effect

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