Washing Machine Control Panel Speaker Shielding Against Moisture
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Solution Overview
Problem
Washing machines face challenges in effectively transmitting sound from speakers while preventing moisture from entering the control panel assembly, which can lead to operational issues and user inconvenience.
Innovation Solution
A shielding unit is implemented at the rear surface of the control panel, featuring side and rear shielding films that guide sound towards the speaker hole while blocking moisture, along with a guide rib to direct sound and a drain hole to manage any moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the speaker is spaced apart from the speaker hole to allow sound transmission, then sound transmission is improved, but moisture can infiltrate into the control panel assembly through the speaker hole
Solution Approach 1:
A shielding unit is introduced as an intermediary component between the speaker and the speaker hole. This shielding unit includes a shielding film that selectively transmits sound waves while blocking moisture infiltration, thus resolving the contradiction between sound transmission and moisture protection
Solution Approach 2:
The shielding film is positioned specifically at the speaker hole area with different properties: it is transparent to sound waves but opaque to moisture. This local quality differentiation allows sound to pass through while preventing moisture infiltration at the critical interface
2Productivity
If the speaker is positioned close to the speaker hole for efficient sound output, then sound transmission efficiency is improved, but moisture infiltration risk increases
Solution Approach 1:
The shielding unit acts as a mediator that enables the speaker to be positioned close to the speaker hole for efficient sound output while simultaneously protecting against moisture infiltration through the selective transmission properties of the shielding film
3Reliability
If the control panel assembly is sealed to prevent moisture entry, then moisture protection is improved, but sound transmission from the speaker is blocked
Solution Approach 1:
The shielding film introduces local quality differentiation into the sealed control panel assembly. The film is positioned at the speaker hole with the property of being acoustically transparent while providing moisture barrier functionality, thus maintaining the seal while enabling sound transmission
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for efficient sound transmission while preventing moisture from entering the control panel, enhancing user convenience through effective sound guidance and moisture management.
Implementation Method 1
The guide rib is configured to guide sound, which is generated from the speaker, toward the speaker hole
Implementation Method 2
A shielding unit is implemented at the rear surface of the control panel, featuring side and rear shielding films that guide sound towards the speaker hole while blocking moisture
Data Source
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AI summary
A washing machine (1) having a structure capable of preventing moisture from being penetrated to the inside the control panel assembly (100) while easily transmitting sound generated from the speaker (170), the washing machine including a cabinet (10), a control panel (110) disposed on a front surface of the cabinet (10), a display unit (150) installed on the control panel (110) such that a front surface of the display unit is exposed to a front of the control panel, a speaker (170) disposed at a rear of the control panel (110), and a speaker hole (115) provided through the control panel (110) so that sound being generated from the speaker is transmitted to outside the control panel, wherein the speaker hole (115) is disposed to be spaced apart from the speaker (170).