Refrigerator Noise Control Using Dynamic Operating Modes
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Solution Overview
Problem
Refrigerators and freezers often produce annoying noise levels due to operating components like compressors and fans, which can disrupt user comfort.
Innovation Solution
A device with a unit that allows components to operate in a quieter mode or be blocked at user request or based on ambient noise levels, using sensors and user inputs to adjust noise levels dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If components operate in normal mode to maintain cooling performance, then cooling efficiency is improved, but noise level increases
Solution Approach 1:
The patent implements dynamic operating modes that allow components to switch between different operational states (first operating mode with higher cooling performance and second operating mode with lower noise). The control unit dynamically adjusts component operation based on user presence detection, enabling the system to adapt its noise level and cooling efficiency according to real-time conditions rather than operating in a fixed state.
Solution Approach 2:
The patent changes operational parameters of components based on detected conditions. When a user is detected near the device, the system transitions from a first operating mode (with higher noise and cooling output) to a second operating mode (with reduced noise and adjusted cooling output). This parameter change allows the system to optimize the balance between cooling efficiency and noise generation based on environmental context.
2Stability of the object's composition
If components operate continuously to maintain temperature, then temperature stability is improved, but user comfort deteriorates due to noise
Solution Approach 1:
The patent employs feedback mechanisms where sensors continuously detect user presence and provide information to the control unit. Based on this feedback, the system adjusts component operation modes to balance temperature stability with user comfort. When users are detected, the system reduces noise from components while maintaining adequate cooling through adjusted operational parameters, thereby preserving user comfort without completely compromising temperature stability.
Solution Approach 2:
The system performs preliminary cooling actions when users are not present by operating components in the first operating mode with higher cooling capacity. This preliminary action pre-cools the interior space, allowing the system to subsequently reduce component operation (second operating mode) when users arrive, thereby maintaining temperature stability with reduced noise during user presence.
Data Source
AI summary
The cooling or freezing appliance has a component which is operable in an operating mode in which the component emits noises in a temporary manner. A unit of the appliance is directly or indirectly connected to another component, such that the component is operated in another operating mode at the instigation of the unit. The component is operable in a low-noise operation, and emits less noise than in the former operating mode. The unit is formed by a control element which is actuable by a user.