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CN-122015144-A - Noise reduction method of intelligent electrical appliance and intelligent electrical appliance thereof

CN122015144ACN 122015144 ACN122015144 ACN 122015144ACN-122015144-A

Abstract

The invention relates to a noise reduction method of an intelligent electric appliance and the intelligent electric appliance, wherein the intelligent electric appliance is provided with an air inlet and an air outlet, the air inlet and the air outlet are respectively provided with a flow guide piece, the angle and the height of each flow guide piece are adjustable, the noise reduction method comprises the following steps of respectively collecting noise signals at the air inlet, the air outlet and a target detection point, and respectively calculating the noise contribution quantity from the air inlet to the target detection point based on a working condition transmission path analysis method Noise contribution from air outlet to target monitoring point According to And And determining the adjusting path and strategy of the guide piece so as to realize the optimal control of the angle and the height of the guide piece. The noise reduction method has the advantages that the noise contribution of the air inlet and the air outlet can be accurately distinguished, data support is provided for noise reduction optimization, and the noise reduction effect is better.

Inventors

  • Pang Shengru

Assignees

  • 宁波方太厨具有限公司

Dates

Publication Date
20260512
Application Date
20260109

Claims (9)

  1. 1. A noise reduction method for an intelligent electric appliance is provided, the intelligent electric appliance is provided with an air inlet and an air outlet, the air inlet and the air outlet are respectively provided with a flow guide piece, the angle and the height of each flow guiding piece are adjustable, and the noise reduction method is characterized by comprising the following steps of: respectively collecting noise signals at the air inlet, the air outlet and the target detection point, and respectively calculating noise contribution quantity from the air inlet to the target monitoring point based on a working condition transmission path analysis method Noise contribution from air outlet to target monitoring point ; According to And (3) with And determining the adjusting path and strategy of the guide piece so as to realize the optimal control of the angle and the height of the guide piece.
  2. 2. A noise reduction method for a smart appliance as defined in claim 1, wherein if And (3) with All are positive values and | – First set threshold value is not less than When the flow guide device is used, only the flow guide piece at one side of the main contribution path is regulated, and the flow guide piece at one side of the small contribution path is fixed; If it is > The air inlet is the main contribution path, the air outlet is the contribution path, if > The air outlet is the main contribution path, and the air inlet is the contribution path.
  3. 3. The method for reducing noise of intelligent electrical appliance as set forth in claim 2, wherein the specific process of adjusting the flow guide member on the side of the main contribution path comprises adjusting an angle α of the flow guide member on the side of the main contribution path, traversing the scan within a set range, and obtaining an optimal angle of the flow guide member on the side of the main contribution path when the target noise is minimum Fixing the optimal angle of the flow guide piece at one side of the main contribution path Then, the height h of the flow guiding piece is adjusted to obtain the optimal height of the flow guiding piece at one side of the main contribution path 。
  4. 4. A noise reduction method for a smart appliance as defined in claim 1, wherein if And (3) with All are positive values and | – |< A synchronous regulation strategy is adopted to simultaneously regulate the angle of the flow guide piece of the air inlet Angle of flow guide piece of air outlet The method comprises the steps of combining the scanning angle combinations, and obtaining the corresponding optimal angle combination when the optimal noise reduction effect is obtained, wherein the optimal angle combination comprises the optimal angle of the flow guide piece of the air inlet Optimum angle of flow guiding piece with air outlet Fixing the optimal angle combination, continuously and synchronously adjusting the heights of the two guide pieces to obtain an optimal height combination, wherein the optimal height combination comprises the optimal heights of the guide pieces of the air inlet Optimum height of flow guide piece with air outlet 。
  5. 5. The method of noise reduction for an intelligent electrical appliance as set forth in claim 4, wherein after the optimal combination of angle and height is obtained, fine tuning is performed on the two flow guiding elements, that is, the angle and height are slightly changed in a local range, so as to capture a possible local optimal solution.
  6. 6. A noise reduction method for a smart appliance as defined in claim 1, wherein if And (3) with One is positive and the other is negative, and the duty ratio B of the frequency interval corresponding to the negative contribution path in the total energy is counted; if B is greater than or equal to the second set threshold The negative contribution path is considered to have a cancellation effect, the angle and the height of the flow guide piece at the side of the negative contribution path are preferentially adjusted, and then the angle and the height of the flow guide piece at the side of the positive contribution path are adjusted; If B < > The negative contribution path is considered to be of no optimal value, and only the angle and height of the deflector on the positive contribution path side are adjusted.
  7. 7. The method for noise reduction of a smart appliance as set forth in claim 6, wherein the step of The value range of (2) is 10 percent or less ≤20%。
  8. 8. An intelligent electrical appliance is characterized in that the noise reduction method of the intelligent electrical appliance is adopted according to any one of claims 1-7.
  9. 9. The intelligent electrical appliance according to claim 8, wherein the intelligent electrical appliance is a range hood.

Description

Noise reduction method of intelligent electrical appliance and intelligent electrical appliance thereof Technical Field The invention relates to the technical field of intelligent electrical appliances, in particular to a noise reduction method of an intelligent electrical appliance and the intelligent electrical appliance. Background The range hood is an intelligent kitchen appliance for purifying kitchen environment. The range hood works by utilizing the fluid dynamics principle and exhausts the oil smoke through a centrifugal fan arranged in the range hood. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor for driving the impeller to rotate. In the operation process of the range hood, the motor is electrified to drive the impeller to rotate, and air flow enters from the air inlet and is discharged from the air outlet after being accelerated by the volute flow channel. The high flow rate air flow generated by the rotation of the impeller and the internal structure of the volute have strong turbulence interference, so that a typical wind noise source is formed. In the high speed region, such wind noise becomes the most noticeable noise component perceived by the user in the kitchen environment. In the working process of the range hood, the noise heard by the human ear is composed of the contributions of two main sound sources of the air inlet and the air outlet, the noise transmitted to the human ear by the air inlet and the noise transmitted to the human ear by the air outlet are combined and overlapped, so that the noise is a typical model with a plurality of excitation sources, a certain correlation exists between the noise transmitted to the human ear by the air inlet and the air outlet, the noise needs to be reduced, the frequencies of the noise transmitted to the human ear by the air inlet are firstly separated, the frequencies of the noise transmitted to the human ear by the air outlet are firstly separated, the most common noise reduction mode at present is that the noise transmitted to the human ear by the air outlet is completely covered by sound-absorbing cotton, and then the contribution of the air inlet and the air outlet is calculated by a synthetic superposition method of sound pressure values. However, the noise reduction mode in the prior art can only completely cover the air outlet in a laboratory, cannot completely cover the air outlet in a user's home, is not realistic and difficult to achieve, noise heard at the human ear is only data of sound pressure level, and according to the superposition method of sound, the noise contribution of the air inlet to the human ear and the noise contribution of the air outlet to the human ear can be reversely deduced, so that the noise reduction effect of the noise reduction mode in the prior art is limited. For this reason, there is a need for further improvements in the art. Disclosure of Invention The first technical problem to be solved by the invention is to provide a noise reduction method of an intelligent electrical appliance, which can identify the noise contribution of an air inlet to a target monitoring point and the noise contribution of an air outlet to the target monitoring point so as to improve the noise reduction effect. The second technical problem to be solved by the invention is to provide an intelligent electrical appliance applying the noise reduction method. The invention solves the first technical problem by adopting the technical scheme that the noise reduction method of the intelligent electrical appliance comprises an air inlet and an air outlet, wherein the air inlet and the air outlet are respectively provided with a flow guide piece, and the angle and the height of each flow guide piece are adjustable, and the noise reduction method is characterized by comprising the following steps: respectively collecting noise signals at the air inlet, the air outlet and the target detection point, and respectively calculating noise contribution quantity from the air inlet to the target monitoring point based on a working condition transmission path analysis method Noise contribution from air outlet to target monitoring point; According toAnd (3) withAnd determining the adjusting path and strategy of the guide piece so as to realize the optimal control of the angle and the height of the guide piece. The specific process of determining the adjusting path and strategy of the flow guiding piece is that ifAnd (3) withAll are positive values and |–First set threshold value is not less thanWhen the flow guide device is used, only the flow guide piece at one side of the main contribution path is regulated, and the flow guide piece at one side of the small contribution path is fixed; If it is >The air inlet is the main contribution path, the air outlet is the contribution path, if>The air outlet is the main contribution path, and the air inlet is the contribution path. Preferably, the specific process of ad