Automatic speed regulation method for range hood

Abstract

The invention provides an automatic speed regulation method for a range hood. The automatic speed regulation method for the range hood is characterized by comprising the following steps that 1, real-time detection of a fan current value is started; 2, low-gear operation is conducted for T<keep>, and then the next step is entered; 3, signals are collected through a main controller, an average valueB is evaluated, whether the B is larger than or equal to lambda<1>A1 is judged, if yes, the step 2 is returned, and if not, the next step is continuously conducted; 4, high-gear operation is conducted for T<keep>, and then the next step is entered; and 5, signals are collected, an average value B is evaluated, whether the B is larger than or equal to lambda<2>A2 is judged, if yes, the step 2 is returned, and if not, the step 4 is returned. The automatic speed regulation method has the advantages that judgment on whether a flue duct is blocked or not is achieved by directly adopting a software-only control mode, not only is the cost saved, but also the control method is simple and easy to conduct; and the consensus problem of an alternating current motor and current transformer is solved,and the accuracy of a detection result is improved.

Description

technical field [0001] The invention relates to a range hood device, in particular to an automatic speed regulation method for a range hood. Background technique [0002] With the process of urbanization, the floors of housing are getting higher and higher. Most of the oily fumes generated by cooking in the kitchens of high-rise residential buildings in China adopt the "smoke pipe" design. Dozens of users on different floors share a common flue. When the kitchen range hoods on different floors are turned on at the same time, a large amount of oily fume is discharged into the public flue, and the long-distance movement of the oily fume through the flue will bring a certain blocking effect, which will increase the internal pressure of the public flue , thus affecting the fume exhaust effect of each user's family. If the air volume gear of the range hood cannot be adjusted in time at this time, it will be difficult for the range hood to quickly discharge the lampblack, which wi...

AI Technical Summary

Problems solved by technology

[0002] With the process of urbanization, the floors of housing are getting higher and higher. Most of the oily fumes generated by cooking in the kitchens of high-rise residential buildings in China adopt the "smoke pipe" design. Dozens of users on different floors share a common flue. When the kitchen range hoods on different floors are turned on at the same time, a large amount of oily fume is discharged into the public flue, and the long-distance movement of the oily fume through the flue will bring a certain blocking effect, which will increase the internal pressure of the public flue , thus affecting the exhaust fume effect of each user's family. If the air volume gear of the range hood cannot be adjusted in time at this time, it will be difficult for the range hood to quickly discharge the lampblack, which will easily cause the lampblack in the user's home to be blocked.

[0003] In the existing technology, there is a Chinese patent "A wind pressure detection automatic speed regulation circuit for range hood" with the patent number of 201621239948.3. The speed regulation circuit, which adds full-wave rectifier bridge, sliding rheostat and other devices on the basis of the existing wind pressure detection circuit, realizes real-time detection of wind pressure and automatic speed regulation of the motor, eliminating the need for manual manipulation during the cooking process The burden of the smoke machine; however, this patent needs to change the resistance value of the sliding rheostat to correct the range of the reference deviation of the current value input to the chip. The addition of the sliding rheostat increases additional processing costs, and the entire production process requires additional adjustments The process of sliding rheostat resistance makes the processing of the entire circuit cumbersome and increases the production process. Therefore, further improvements are needed to simplify production and reduce production costs.

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