Search

CN-122015145-A - Filter device of intelligent range hood, intelligent range hood and control method

CN122015145ACN 122015145 ACN122015145 ACN 122015145ACN-122015145-A

Abstract

The invention discloses a filtering device of an intelligent range hood, the intelligent range hood and a control method, wherein the filtering device of the intelligent range hood is arranged in a range hood oil channel of the range hood and comprises an electret pre-charge filter screen and a piezoelectric transducer assembly, the piezoelectric transducer assembly comprises a first piezoelectric transducer and a second piezoelectric transducer which are arranged on two opposite sides in the range hood oil channel, and the electret pre-charge filter screen and the piezoelectric transducer assembly are sequentially arranged from upstream to downstream along an oil fume flow path.

Inventors

  • HE LIBO

Assignees

  • 宁波方太厨具有限公司

Dates

Publication Date
20260512
Application Date
20260109

Claims (8)

  1. 1. The filtering device of the intelligent range hood is used for being arranged in a lampblack channel (11) of the range hood and is characterized in that: The filtering device includes: Electret pre-charged filter screen (33), and A piezoelectric transducer assembly comprising a first piezoelectric transducer (34) and a second piezoelectric transducer (35) arranged on opposite sides within the oil smoke channel (11); The electret pre-charge filter screen (33) and piezoelectric transducer assembly are arranged in sequence from upstream to downstream along the soot flow path.
  2. 2. The filtering device of the intelligent range hood according to claim 1, wherein the filtering device further comprises: A smoke sensor (31) for detecting the concentration of smoke and the median particle diameter of smoke particles, and And the potentiometer (32) is used for detecting the surface voltage of the electret pre-charge filter screen (33).
  3. 3. The filter device of a smart range hood according to claim 2, wherein the number of soot sensors (31) is two, one soot sensor (31) being arranged upstream of the electret pre-charge filter screen (33) and the other soot sensor (31) being arranged downstream of the piezoelectric transducer assembly along the soot flow path.
  4. 4. The filter device of the intelligent range hood according to claim 1 or 2, wherein the electret pre-charge filter screen (33) is a multi-layer honeycomb electret filter screen, and the equivalent diameter of the mesh is 2-8 mm.
  5. 5. The filter device of intelligent kitchen ventilator according to claim 4, wherein the electret pre-charge filter screen (33) is a filter screen made of corona polarized polypropylene.
  6. 6. An intelligent range hood comprises an air inlet body (1) and a main controller (4), wherein an oil smoke channel (11) is formed in the air inlet body (1), and the intelligent range hood is characterized in that a filter device of the range hood according to any one of claims 1-5 is arranged in the oil smoke channel (11), and all parts of the filter device are electrically connected with the main controller (4).
  7. 7. The control method of the filtering device of the intelligent range hood comprises an air inlet body (1) and a main controller (4), wherein an oil smoke channel (11) is formed in the air inlet body (1); the intelligent range hood is characterized in that the filter device of the intelligent range hood according to claim 3 is arranged in the oil smoke channel (11), and all parts of the filter device are electrically connected with the main controller (4); the control method comprises the following steps: 1) Starting the range hood, if a shutdown signal is received, closing each energy converter, and if not, entering the step 2); 2) Collecting real-time data by a lampblack sensor (31) positioned at the upstream of an electret pre-charge filter screen (33), wherein the data comprise lampblack concentration C and median particle diameter D 50 of lampblack particles; 3) Judging whether the collected real-time oil smoke concentration C and median particle diameter D 50 exceed respective preset thresholds, if yes, entering a step 4), and if not, maintaining the frequency parameters of the current piezoelectric transducer assembly and the voltage parameters of an electret pre-charge filter screen (33); 4) Calculating the frequency according to the oil smoke concentration C detected in real time and the median diameter D 50 of the oil smoke particles , Adjusting the frequency of the piezoelectric transducer assembly to the calculated frequency Calculating the voltage Wherein For gain parameters, the voltage applied to the electret pre-charge filter screen (33) is adjusted to the calculated voltage Then go to step 5); 5) Judging whether the sound field phases of the two piezoelectric transducers are synchronous, if so, updating two control parameters of frequency and voltage, returning to the step 2), and if not, triggering phase calibration.
  8. 8. The method of claim 7, wherein in step 5), the effect of frequency and voltage adjustment is determined by collecting the real-time oil smoke concentration C and the median diameter D 50 of the oil smoke particles through an oil smoke sensor (31) positioned at the downstream of the piezoelectric transducer assembly.

Description

Filter device of intelligent range hood, intelligent range hood and control method Technical Field The invention relates to intelligent kitchen electricity, in particular to a filter device of an intelligent range hood, the intelligent range hood with the filter device and a control method of the filter device of the intelligent range hood. Background The range hood has become one of the indispensable kitchen appliances in modern families. The range hood works by utilizing the fluid dynamics principle, and the range hood sucks the oil fume through a fan system arranged in the range hood and filters part of grease particles by using a filter screen. The traditional range hood generally adopts a metal filter screen and a fan impeller to realize the function of filtering oil smoke through centrifugal separation, but can only separate large-particle oil dirt particles, and can not basically act on submicron-level oil smoke particles within PM10 and even around PM2.5, and the harm and pollution of submicron-level oil smoke particles within PM10 and even around PM2.5 are more concerned in recent years by user health and environmental protection. The oil adsorption module is applied to a range hood and comprises an ionization region assembly, wherein the ionization region assembly comprises an ionization region bracket, an ionization plate and a plurality of first high-voltage conducting rods, the ionization region bracket is provided with a first accommodating groove, the ionization plate is arranged in the first accommodating groove and is provided with a plurality of discharge electric tips, the first high-voltage conducting rods are arranged corresponding to the discharge electric tips so as to electrically connect each discharge electric tip, and the discharge tips and the first high-voltage conducting rods are integrated on the ionization plate and are integrally arranged with the ionization plate. However, the filtering device has the advantages that high voltage is conducted for a long time, the risk of ignition exists, the energy consumption is high, the core index of the range hood has the energy consumption requirement, and many consumers with excessively high energy consumption cannot select the filtering device, so that the technical development direction is influenced. Thus, there is a need for further improvement. Disclosure of Invention The first technical problem to be solved by the invention is to provide a filtering device of an intelligent range hood, which aims at the defects of the prior art, and improves the filtering capability of submicron-level oil smoke particles within PM10 and even about PM2.5 under low power consumption. The second technical problem to be solved by the invention is to provide an intelligent range hood with the filtering device. The third technical problem to be solved by the invention is to provide a control method of the filtering device of the intelligent range hood. The invention solves the first technical problem by adopting a technical scheme that a filtering device of an intelligent range hood is used for being arranged in a range hood oil smoke channel and is characterized in that: The filtering device includes: Electret pre-charged filter screen, and A piezoelectric transducer assembly comprising a first piezoelectric transducer and a second piezoelectric transducer disposed on opposite sides within the oil smoke channel; The electret pre-charge filter screen and piezoelectric transducer assembly are arranged in sequence from upstream to downstream along the soot flow path. Through the arrangement of the electret pre-charge filter screen, when oil fume passes, oil fume particles are charged due to field polarization, the coulomb force and the inductive force of charged fibers on the particles are utilized to capture the particles, the filtering mechanism not only relies on physical filtering, but also increases electrostatic adsorption effect, particle migration rate in a sound field is enhanced, and therefore filtering efficiency on submicron particles is improved, a standing wave field with a phase difference of 180 degrees can be formed by matching with a piezoelectric transducer assembly arranged at the downstream of the filter screen, the sound radiation force drives charged oil drops to gather towards the standing wave node position of the standing wave field, and further the sound radiation force is maximized, the self-adaption dynamic adaptation of the change of oil fume components is realized, the gathering efficiency is improved, the filtering capability is enhanced, and the filtering capability of submicron-level oil fume particles within PM10 and even around PM2.5 is improved by combining electrostatic force and sound radiation force, so that the interception filtering efficiency is improved to 98% compared with 90% -92% of common mechanical type. Further, to facilitate adjusting the voltage of the electret pre-charged filter screen and the frequen