Range hood capable of self-adaptively regulating rotating speed of fan

Abstract

The invention discloses a range hood capable of self-adaptively regulating the rotating speed of a fan. The range hood comprises a range hood shell, a motor arranged in the range hood shell and a speed regulation control circuit capable of controlling the rotating speed of the fan, wherein the motor is connected with an air outlet through an exhaust pipeline; and the air outlet is communicated with a public flue. The range hood is characterized by being provided with a sensor capable of detecting the pressure variation of the public flue, wherein an induction output end of the sensor is connected with an input end of the speed regulation control circuit; and an output end of the speed regulation control circuit is connected with the motor. When the pressure variation of the public flue is detected by the sensor, a corresponding decision is made; according to output power of a motor system which is required under corresponding pressure, the rotating speed of the fan of the range hood can be self-adaptively regulated, so that the smoke exhausting effect of the public flue is improved, and the flue is prevented from being plugged; and simultaneously, cooking fumes in a room can be smoothly removed, and a smoke exhaust environment of a kitchen is effectively improved.

Description

Technical field [0001] The invention relates to a range hood, in particular to a range hood capable of realizing self-adaptive adjustment of fan speed. Background technique [0002] At present, most of the oil fume produced by the cooking in the domestic high-rise residential exhaust kitchen adopts the "smoke tube" (the lower part is closed) design. Generally, dozens of users share a common flue. In theory, the flue gas is always pushed upward. The oil fume of each user's home can be discharged along the public flue, but when it encounters the concentrated use of multiple range hoods on different floors (such as cooking time), a large amount of oil fume is discharged into the public flue, and the oil fume passes through the flue. The distance exercise will bring a certain blocking effect, which will increase the internal pressure of the public flue, which will affect the fume exhaust effect of each user's home. [0003] In order to ensure the effect of household cooking fume exhau...

AI Technical Summary

Problems solved by technology

The above-mentioned patent utilizes the principle of light intensity attenuation caused by the absorption and reflection effect of oil fume on light, adopts the photoelectric detection method to measure the oil fume concentration, and converts the change of oil fume concentration into an electrical signal and outputs it to the control circuit, and the control circuit adjusts the ventilation of the ventilation equipment accordingly. However, the oil fume detection and control device in this patent is installed on the main engine of the range hood, and it detects the concentration of indoor oil fume, which cannot reflect the oil fume pressure of the public flue in time. In actual use, when the external oil fume pressure When the motor is still running at the current fixed power level, the motor automatic adjustment device will start only when a certain amount of fume is generated in the room. The disadvantage is that a large amount of fume pollution will still be generated indoors during use, and the motor The speed adjustment action lags behind the actual oil fume pressure change, and the ideal smoke exhaust effect cannot be achieved

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