Variable-frequency range hood and control method thereof

Abstract

The invention discloses a variable-frequency range hood. The range hood comprises a fan motor and a power supply module for supplying power to the fan motor, and is characterized by further comprisinga controller, a smoke sensor, a storage module and a frequency conversion module; the signal output end of the smoke sensor is electrically connected with the signal input end of the controller, thestorage module is used for storing data for being read by the controller, the frequency conversion module is provided with an input interface which is electrically connected with the controller and anoutput interface which is electrically connected with the fan motor, the controller can control the output frequency of the frequency conversion module according to the output signal of the smoke sensor and the data of the storage module, and then the rotating speed of the fan motor is adjusted. According to the variable-frequency range hood, the output frequency of the frequency conversion module is controlled by acquiring the smoke change through the smoke sensor so that the motor can adjust the speed more rapidly, in the frequency conversion process, the speed regulation winding concatenation speed regulation mode which is relatively energy-consuming is not needed, so that the frequency conversion efficiency is higher, the frequency can also be changed rapidly so that the adjustment ofthe range hood in a larger rotating speed range can be achieved, and user experience is improved.

Description

technical field [0001] The invention relates to a range hood, in particular to a frequency conversion range hood and a control method thereof. Background technique [0002] At present, the AC motor of the range hood has a rotation speed of only 1500 rpm due to the synchronization of the magnetic field within 50 Hz of the mains supply. Since its overall rotation speed cannot exceed 1500 rpm, it cannot achieve a greater effective air volume in a public flue environment with high resistance. For example, in the case of a large change in cooking fume such as stir frying, if the fan motor is limited by the speed of 1500 rpm, a large amount of cooking fume generated by stir frying will not be able to be sucked into the range hood, and the escaping cooking fume will pollute the kitchen air. In view of the above-mentioned defect that the frequency conversion of the AC motor cannot be performed, a frequency conversion range hood that uses a frequency conversion motor to adjust the mo...

AI Technical Summary

Problems solved by technology

[0002] At present, the AC motor of the range hood has a rotation speed of only 1500 rpm due to the synchronization of the magnetic field within 50 Hz of the mains. Since its overall rotation speed cannot exceed 1500 rpm, it cannot achieve a greater effective air volume in a public flue environment with high resistance.

For example, in the case of large changes in cooking fumes such as stir-frying, if the fan motor is limited by the speed of 1500 rpm, a large amount of cooking fumes generated by stir-frying cannot be sucked into the range hood, and the escaping fumes will pollute the kitchen air.

In view of the above-mentioned defect that the frequency conversion of the AC motor cannot be performed, a frequency conversion range hood that uses a frequency conversion motor to adjust the motor speed has been disclosed in the prior art, such as a Chinese utility model patent with the patent number ZL 201420826305.3 (the authorized announcement number is CN 204373022 U) The disclosed "An Intelligent Variable Frequency Range Hood" includes a fume collecting hood, a control component and a fan component. The control component includes a power supply module, a system control module and a motor drive module that are electrically connected in sequence. The motor of the fan component is an AC variable frequency The motor and the control assembly also include an environment detection module and a flue negative pressure detection module respectively connected between the power supply module and the system control module. At the exhaust port of the fan assembly

The intelligent variable frequency range hood adopts an AC variable frequency motor, and only one circuit board is used to adjust the running speed of the AC variable frequency motor, so as to realize the control of stepless speed change. speed, not only the adjustment range is small, the efficiency is low, but also the energy consumption is high, which is not conducive to energy saving

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