EP-4737738-A1 - NOISE REDUCTION DEVICE AND METHOD FOR FAN IN TERMINAL

EP4737738A1EP 4737738 A1EP4737738 A1EP 4737738A1EP-4737738-A1

Abstract

Embodiments of the present application relate to a noise reduction device and method for a fan in a terminal. The noise reduction device includes: a first air duct, at least one noise reduction air duct, and a switch assembly; one end of the first air duct is connected to a fan air outlet, and the other end of the first air duct is connected to a terminal air outlet; one end of the noise reduction air duct is connected to the fan air outlet, and the other end of the noise reduction air duct is connected to the terminal air outlet; switches in the switch assembly are located at an air inlet of the noise reduction air duct and an air outlet of the noise reduction air duct, and the switch assembly is configured to control opening or closing of the noise reduction air duct; and an air duct length difference between the first air duct and the noise reduction air duct is nL+L/2, where n is a natural number and L is a wind noise wavelength at the fan air outlet.

Inventors

SUN, QUAN

Assignees

ZTE CORPORATION

Dates

Publication Date: 20260506
Application Date: 20240809

Claims (10)

A noise reduction device for a fan in a terminal, characterized by comprising: a first air duct, at least one noise reduction air duct, and a switch assembly; wherein: one end of the first air duct is connected to a fan air outlet, and the other end of the first air duct is connected to a terminal air outlet; one end of the noise reduction air duct is connected to the fan air outlet, and the other end of the noise reduction air duct is connected to the terminal air outlet; switches in the switch assembly are located at an air inlet of the noise reduction air duct and an air outlet of the noise reduction air duct, and the switch assembly is configured to control opening or closing of the noise reduction air duct; and an air duct length difference between the first air duct and the noise reduction air duct is nL+L/2, where n is a natural number and L is a wind noise wavelength at the fan air outlet.
The noise reduction device according to claim 1, wherein a common switch is provided between the air inlets or the air outlets of two adjacent noise reduction air ducts, and the switch is configured to simultaneously open one noise reduction air duct and close the other noise reduction air duct.
The noise reduction device according to claim 1, wherein the air inlet of each noise reduction air duct or the air outlet of each noise reduction air duct is provided with a switch, and the switch is configured to open or close the noise reduction air duct.
The noise reduction device according to claim 2, wherein the noise reduction device comprises a first noise reduction duct, a second noise reduction duct, and a third noise reduction duct with sequentially increasing air duct lengths; the first noise reduction duct, the second noise reduction duct, and the third noise reduction duct are provided in parallel in sequence; a switch is provided between an air inlet of the first noise reduction duct and an air inlet of the second noise reduction duct, and a switch is provided between the air inlet of the second noise reduction duct and an air inlet of the third noise reduction duct; and a switch is provided between an air outlet of the first noise reduction duct and an air outlet of the second noise reduction duct, and a switch is provided between the air outlet of the second noise reduction duct and an air outlet of the third noise reduction duct.
The noise reduction device according to claim 1, wherein a shape of the first duct and/or a shape of the noise reduction duct is a straight line, an arc, or a bend.
A noise reduction method for a fan in a terminal, characterized by comprising: obtaining a current speed setting at a fan air outlet, wherein different speed settings correspond to different wind speeds; opening a target noise reduction air duct corresponding to the current speed setting by controlling a switch based on a preset mapping relationship, wherein the preset mapping relationship indicates that different speed settings correspond to different lengths of noise reduction air ducts; and delivering an airflow at the fan air outlet to a terminal air outlet via a first air duct of fixed length and the target noise reduction air duct, to ensure that waveforms of wind noise generated by the first air duct and the target noise reduction air duct at the terminal air outlet are consistent, and that a waveform phase difference is m * 180°, where m is a positive integer.
The method according to claim 6, wherein the opening the target noise reduction air duct corresponding to the current speed setting by controlling the switch based on the preset mapping relationship, the method further comprises: determining a wind noise frequency of the wind speed corresponding to the current speed setting at the fan air outlet; determining a wind noise wavelength of the wind speed according to a preset coefficient and the wind noise frequency; determining an air duct length of a noise reduction air duct according to the wind noise wavelength and an air duct length of the first air duct, wherein an air duct length difference between the air duct length of the noise reduction air duct and the air duct length of the first air duct is nL+L/2, where n is a natural number and L is a wind noise wavelength at the fan air outlet; and establishing a mapping relationship between the speed setting and the air duct length of the noise reduction air duct.
The method according to claim 6, wherein the speed settings comprise a first speed setting, a second speed setting, and a third speed setting corresponding to the wind speed decreasing in sequence, and the noise reduction duct comprises a first noise reduction duct, a second noise reduction duct, and a third noise reduction duct with sequentially increasing air duct lengths; the opening the target noise reduction air duct corresponding to the current speed setting by controlling the switch based on the preset mapping relationship comprises: in response to detecting that the current speed setting is a first speed setting, closing the second noise reduction air duct and the third noise reduction duct, and opening the first noise reduction duct by controlling the switch; or in response to detecting that the current speed setting is a second speed setting, closing the first noise reduction air duct and the third noise reduction duct, and opening the second noise reduction duct by controlling the switch; or in response to detecting that the current speed setting is a third speed setting, closing the first noise reduction air duct and the second noise reduction duct, and opening the third noise reduction duct by controlling the switch.
An electronic device, characterized by comprising: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory are configured to communicate with each other via the communication bus; the memory is configured to store a computer program; and the processor is configured to implement the method according to any one of claims 6 to 8 when executing the program stored in the memory.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and the computer program implements the method according to any one of claims 6 to 8 when executed by a processor.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202311142344.1, filed on September 5, 2023. The disclosure of the above-mentioned application is incorporated herein by reference in its entirety. TECHNICAL FIELD The present application relates to the field of terminals, and more particularly to a noise reduction device for a fan in a terminal and a noise reduction method for a fan in a terminal. BACKGROUND Currently, products such as mobile phones, customer premise equipment (CPEs), tablets, and laptops generate heat during use, so it is necessary to cool down the terminals. The current cooling method used is to install a fan inside the terminal, however the wind generated by the fan will produce noise during the transmission to the terminal air outlet, which affects the user experience. SUMMARY The present application provides a noise reduction device for the fan in the terminal and a method thereof. In a first aspect, embodiments of the present application provide a noise reduction device for a fan in a terminal including: a first air duct, at least one noise reduction air duct, and a switch assembly; one end of the first air duct is connected to a fan air outlet, and the other end of the first air duct is connected to a terminal air outlet; one end of the noise reduction air duct is connected to the fan air outlet, and the other end of the noise reduction air duct is connected to the terminal air outlet; switches in the switch assembly are located at an air inlet of the noise reduction air duct and an air outlet of the noise reduction air duct, and the switch assembly is configured to control opening or closing of the noise reduction air duct; and an air duct length difference between the first air duct and the noise reduction air duct is nL+L/2, where n is a natural number and L is a wind noise wavelength at the fan air outlet. In a second aspect, embodiments of the present application provide a noise reduction method for a fan in a terminal including: obtaining a current speed setting at a fan air outlet, different speed settings correspond to different wind speeds; opening a target noise reduction air duct corresponding to the current speed setting by controlling a switch based on a preset mapping relationship, the preset mapping relationship indicates that different speed settings correspond to different lengths of noise reduction air ducts; and delivering an airflow at the fan air outlet to a terminal air outlet via a first air duct of fixed length and the target noise reduction air duct, to ensure that waveforms of wind noise generated by the first air duct and the target noise reduction air duct at the terminal air outlet are consistent, and that a waveform phase difference is m * 180°. In a third aspect, embodiments of the present application provides an electronic device, including: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, and the processor is configured for: obtaining a current speed setting at a fan air outlet, different speed settings correspond to different wind speeds; opening a target noise reduction air duct corresponding to the current speed setting by controlling a switch based on a preset mapping relationship, the preset mapping relationship indicates that different speed settings correspond to different lengths of noise reduction air ducts; and delivering an airflow at the fan air outlet to a terminal air outlet via a first air duct of fixed length and the target noise reduction air duct, to ensure that waveforms of wind noise generated by the first air duct and the target noise reduction air duct at the terminal air outlet are consistent, and that a waveform phase difference is m * 180°. In a fourth aspect, embodiments of the present application further provide a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program implements the method as described in any of the preceding items of the present application when executed by a processor. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort. One or more embodiments are illustrated by way of example through the corresponding images in the accompanying drawings. These exemplary descripti