CN-122015156-A - Range hood and control method thereof

CN122015156ACN 122015156 ACN122015156 ACN 122015156ACN-122015156-A

Abstract

The invention discloses a range hood and a control method thereof, wherein the range hood comprises a plurality of branch air pipes and fans respectively arranged in the branch air pipes, air inlets of the branch air pipes are respectively positioned above different cooking areas, the control method of the range hood comprises the steps of continuously obtaining the oil smoke information of the cooking areas when the range hood is in operation, obtaining the predicted rotating speed of the fans according to the oil smoke information of the cooking areas, obtaining the predicted total noise value of the range hood according to the predicted rotating speed of the fans, obtaining the target rotating speed of the fans according to the predicted total noise value, the preset noise threshold, the predicted rotating speed of the fans and the oil smoke information of the cooking areas when the predicted total noise value is larger than a preset noise threshold, and controlling the operation of the fans according to the target rotating speed of the fans, so that the actual total running noise of the range hood is controlled within the preset noise threshold on the premise of ensuring the oil smoke sucking efficiency and the controllable oil smoke diffusion trend, and the balance optimization of the oil smoke sucking effect and the running noise is realized.

Inventors

CHEN LAN
LUO XIANCAI
HU DONGFANG
REN FUJIA
ZHANG SU

Assignees

杭州老板电器股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260403

Claims (11)

1. The control method of the range hood is characterized in that the range hood comprises a plurality of branch air pipes and fans respectively arranged in the branch air pipes, air inlets of the branch air pipes are respectively positioned above different cooking areas, and the control method of the range hood comprises the following steps: continuously acquiring the oil smoke information of each cooking area when the range hood is in the running process; acquiring the predicted rotating speed of each fan according to the oil smoke information of each cooking area; acquiring a predicted total noise value of the range hood according to the predicted rotating speed of each fan; When the predicted total noise value is larger than a preset noise threshold value, acquiring target rotating speeds of the fans according to the predicted total noise value, the preset noise threshold value, the predicted rotating speeds of the fans and the oil smoke information of the cooking areas; and controlling the operation of each fan according to the target rotating speed of each fan.
2. The control method of a range hood according to claim 1, wherein the fume information includes a fume concentration; Obtaining the target rotation speed of each fan according to the predicted total noise value, the preset noise threshold, the predicted rotation speed of each fan and the oil smoke information of each cooking area, wherein the method comprises the following steps: Acquiring comprehensive indexes of the fans according to the predicted rotating speeds of the fans and the oil smoke concentration of the cooking areas; acquiring a noise difference value between the predicted total noise value and the preset noise threshold; And acquiring the target rotating speed of each fan according to the noise difference value, the comprehensive index of each fan and the predicted rotating speed of each fan.
3. The control method of a range hood according to claim 2, wherein each fan is a first fan, a second fan and a third fan, the comprehensive index of the first fan is greater than the comprehensive index of the second fan, and the comprehensive index of the second fan is greater than the comprehensive index of the third fan; according to the noise difference value, the comprehensive index of each fan and the predicted rotating speed of each fan, the target rotating speed of each fan is obtained, and the method comprises the following steps: When the noise difference value is greater than zero and smaller than or equal to a first preset difference value, determining the difference value between the predicted rotating speed and the preset rotating speed of the first fan as the target rotating speed of the first fan, determining the predicted rotating speed of the second fan as the target rotating speed of the second fan, and determining the predicted rotating speed of the third fan as the target rotating speed of the third fan; When the noise difference is greater than a first preset difference and less than or equal to a second preset difference, determining the difference between the predicted rotational speed and the preset rotational speed of the first fan as a target rotational speed of the first fan, determining the difference between the predicted rotational speed and the preset rotational speed of the second fan as a target rotational speed of the second fan, and determining the predicted rotational speed of the third fan as a target rotational speed of the third fan; when the noise difference value is larger than a second preset difference value, determining the difference value between the predicted rotating speed and the preset rotating speed of the first fan as the target rotating speed of the first fan, determining the difference value between the predicted rotating speed and the preset rotating speed of the second fan as the target rotating speed of the second fan, and determining the difference value between the predicted rotating speed and the preset rotating speed of the third fan as the target rotating speed of the third fan; The second preset difference value is larger than the first preset difference value, and the first preset difference value is larger than zero.
4. The control method of a range hood according to claim 1, wherein after obtaining a target rotational speed of each fan based on the predicted total noise value, the preset noise threshold, the predicted rotational speed of each fan, and the oil smoke information of each cooking area, and before controlling each fan to operate based on the target rotational speed of each fan, further comprising: acquiring a target total noise value and total exhaust air quantity of the range hood according to the target rotating speed of each fan; judging whether the target total noise value is smaller than or equal to the preset noise threshold value or not, and whether the total exhaust air quantity is larger than a preset exhaust air quantity or not; if yes, executing the step of controlling the operation of each fan according to the target rotating speed of each fan; if not, returning to execute the step of continuously acquiring the oil smoke information of each cooking area in the operation process of the range hood.
5. The control method of a range hood according to claim 1, wherein the fume information includes a fume concentration; When the predicted total noise value is smaller than or equal to the preset noise threshold value, acquiring comprehensive indexes of the fans according to the predicted rotating speeds of the fans and the oil smoke concentration of the cooking areas; judging whether the comprehensive index of each fan is larger than or equal to zero; if yes, respectively determining the predicted rotating speed of each fan as the target rotating speed of each fan; If not, determining each fan with the comprehensive index smaller than zero as a fourth fan, and determining each fan with the comprehensive index larger than or equal to zero as a fifth fan; and determining the sum of the predicted rotating speed and the preset rotating speed of the fourth fan as the target rotating speed of the fourth fan, and determining the predicted rotating speed of the fifth fan as the target rotating speed of the fifth fan.
6. The control method of a range hood according to claim 5, wherein when determining the sum of the predicted rotational speed and a preset rotational speed of the fourth type fan as a target rotational speed of the fourth type fan and determining the predicted rotational speed of the fifth type fan as a target rotational speed of the fifth type fan, after controlling the operation of each fan according to the target rotational speed of each fan, further comprising: Acquiring the duration time of each fan running at the current target rotating speed; and when the duration time reaches the preset time, returning to execute the step of continuously acquiring the oil smoke information of each cooking area in the operation process of the range hood.
7. The control method of a range hood according to claim 2 or 5, wherein obtaining the comprehensive index of each fan according to the predicted rotation speed of each fan and the oil smoke concentration of each cooking area comprises: Acquiring a comprehensive index calculation formula; based on the comprehensive index calculation formula, acquiring the comprehensive index of each fan according to the predicted rotating speed of each fan and the oil smoke concentration of each cooking area; the comprehensive index calculation formula is P i =α×n i /n max -β×S i /S max ; Wherein P i is a comprehensive index of the ith fan, n i is a predicted rotation speed of the ith fan, S i is a cooking fume concentration of the cooking area corresponding to the ith fan, α is a weight coefficient of the predicted rotation speed, β is a weight coefficient of the cooking fume concentration, n max is a normalization factor of the predicted rotation speed, and S max is a normalization factor of the cooking fume concentration.
8. The control method of a range hood according to claim 1, wherein obtaining a predicted total noise value of the range hood according to the predicted rotational speeds of the fans comprises: Acquiring a predicted noise value of each fan according to the predicted rotating speed of each fan; acquiring a total noise calculation formula; Based on the total noise calculation formula, acquiring a predicted total noise value of the range hood according to the predicted noise value of each fan; the total noise calculation formula is as follows: Wherein L total is the predicted total noise value, li is the noise value of the ith fan, deltaL phase is the phase interference correction value, and q is the number of fans in the range hood.
9. The control method of a range hood according to claim 1, wherein the fume information includes a first fume concentration, a second fume concentration, a fume diffusion direction, and a fume diffusion speed; Continuously acquiring the oil smoke information of each cooking area, wherein the oil smoke information comprises the following components: continuously acquiring first image information and lampblack sensing information of each cooking area; Acquiring first oil smoke concentration, oil smoke diffusion direction and oil smoke diffusion speed of each cooking area according to each first image information; Acquiring second oil smoke concentration of each cooking area according to the oil smoke sensing information; obtaining the predicted rotating speed of each fan according to the oil smoke information of each cooking area, wherein the method comprises the following steps: Acquiring an overall oil smoke distribution map according to the first oil smoke concentration, the oil smoke diffusion direction, the oil smoke diffusion speed and the second oil smoke concentration; Obtaining a predicted rotating speed deep learning model; And acquiring the predicted rotating speed of each fan according to the integral oil smoke distribution diagram based on the deep learning model.
10. The control method of a range hood according to claim 1, further comprising, before the range hood is in operation: when the range hood is started, acquiring second image information of each cooking area; Acquiring the type of the cooking utensil in each cooking area according to each second image information; And acquiring the initial target rotating speed of each fan according to the type of each cooking utensil.
11. The range hood is characterized by comprising a controller, a plurality of air channels and fans respectively arranged in the air channels; Each air duct corresponds to different cooking areas respectively; the controller is used for executing the control method of the range hood according to any one of claims 1-10.

Description

Range hood and control method thereof Technical Field The invention relates to the field of kitchen appliances, in particular to a range hood and a control method thereof. Background At present, the range area and other areas in the kitchen cooking process have obvious difference in the oil smoke and water vapor amount, and an ideal oil smoke absorbing mode can dynamically distribute the air quantity of the air suction port according to the actual pollutant escape amount of each area. However, most of the existing range hoods are of a single air suction port or a fixed air duct structure, and differential suction aiming at different areas is difficult to realize, so that local oil smoke or water vapor escapes. In order to solve the problems, a multi-channel range hood is arranged on the market, and a plurality of smoke sucking ports are arranged above a kitchen range to correspond to different cooking areas. However, in practical use, a plurality of air channels often generate larger operation noise when working simultaneously. Because of lack of a real-time sensing and automatic air quantity distribution mechanism for oil smoke or water vapor quantity, each air channel always operates in a constant or preset mode, and when only a small amount of water vapor is needed to be treated, the redundant air channels still operate at full speed, so that energy waste is caused, noise is increased remarkably, and user experience is influenced. Disclosure of Invention The invention provides a range hood and a control method thereof, which are used for effectively discharging multi-region oil smoke in a kitchen and simultaneously effectively reducing superposition noise generated by the operation of multiple fans. According to an aspect of the present invention, there is provided a control method of a range hood, the range hood including a plurality of branch air pipes and fans respectively disposed in the branch air pipes, air inlets of the branch air pipes being respectively located above different cooking areas, the range hood control method including: continuously acquiring the oil smoke information of each cooking area when the range hood is in the running process; acquiring the predicted rotating speed of each fan according to the oil smoke information of each cooking area; obtaining a predicted total noise value of the range hood according to the predicted rotating speed of each fan; when the predicted total noise value is larger than the preset noise threshold value, acquiring the target rotating speed of each fan according to the predicted total noise value, the preset noise threshold value, the predicted rotating speed of each fan and the oil smoke information of each cooking area; And controlling the operation of each fan according to the target rotating speed of each fan. Optionally, the fume information includes fume concentration; obtaining the target rotating speed of each fan according to the predicted total noise value, the preset noise threshold, the predicted rotating speed of each fan and the oil smoke information of each cooking area, wherein the method comprises the following steps: Acquiring comprehensive indexes of each fan according to the predicted rotating speed of each fan and the oil smoke concentration of each cooking area; Acquiring a noise difference value between a predicted total noise value and a preset noise threshold value; and obtaining the target rotating speed of each fan according to the noise difference value, the comprehensive index of each fan and the predicted rotating speed of each fan. Optionally, each fan is a first fan, a second fan and a third fan, the comprehensive index of the first fan is greater than the comprehensive index of the second fan, and the comprehensive index of the second fan is greater than the comprehensive index of the third fan; obtaining a target rotating speed of each fan according to the noise difference value, the comprehensive index of each fan and the predicted rotating speed of each fan, wherein the method comprises the following steps: When the noise difference value is greater than zero and smaller than or equal to a first preset difference value, determining the difference value between the predicted rotating speed and the preset rotating speed of the first fan as the target rotating speed of the first fan, determining the predicted rotating speed of the second fan as the target rotating speed of the second fan, and determining the predicted rotating speed of the third fan as the target rotating speed of the third fan; When the noise difference value is larger than the first preset difference value and smaller than or equal to the second preset difference value, determining the difference value between the predicted rotating speed and the preset rotating speed of the first fan as the target rotating speed of the first fan, determining the difference value between the predicted rotating speed and the preset rotating speed of the second fan a