Chamber switch for refrigerator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional door switches in refrigerators are not operated efficiently due to mechanical limitations, such as door or frame changes, leading to suboptimal control of cooling fans and chamber lights, which affects energy efficiency.
Innovation Solution
A door switch system comprising a light detector, a first switch for controlling the cooling fan, and a second switch for controlling the storage-space light, which are activated based on the door's open or closed state, ensuring efficient energy-saving operations by integrating an external reference light for accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical door switch is used to control the cooling fan and chamber light, then the system can respond to door opening/closing events, but the switch may not operate properly due to door or door frame changes such as slacking
Solution Approach 1:
The patent replaces the mechanical door switch with an optical detection system consisting of a light source and light sensor. This optical system detects door opening/closing events through changes in light reflection or transmission, eliminating the mechanical contact issues that cause unreliable operation with door slacking or frame variations.
2Use of energy by moving object
If the cooling fan is controlled to stop when the door is opened, then energy consumption is reduced, but the temperature control in the storage space may be compromised
Solution Approach 1:
The system uses periodic or conditional operation of the cooling fan based on door state detection. When the door is closed, the fan operates to maintain temperature. When the door is opened (detected by the optical sensor), the fan stops to save energy. The system cycles between these states based on actual door opening/closing events, optimizing energy consumption while maintaining temperature stability during closed periods.
3Ease of operation
If the chamber light is controlled to turn on when the door is opened, then user convenience is improved, but energy consumption increases
Solution Approach 1:
The system uses feedback from the optical sensor to control the chamber light. The light detector provides real-time information about door opening state, which triggers the light to turn on only when needed (when the door is opened). This feedback-based control ensures user convenience by illuminating the chamber during door openings while minimizing energy consumption by keeping the light off during closed periods.
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
The system effectively manages the operation of cooling fans and chamber lights, enhancing energy efficiency by accurately responding to door openings and closures, thereby conserving energy and improving operational reliability.
Implementation Method 1
a light detector, a first switch, and a second switch. The light detector is disposed in the storage space
Data Source
AI summary
A door switch system is provided for energy saving in a refrigerator. The door switch system comprises a light detector, a first switch, and a second switch. The light detector is disposed in the storage space. The first switch is configured for switching the cooling fan according to an output from the light detector detecting external light. The second switch is configured for switching the storage-space light according to an output from the light detector detecting external light. When a door to the storage space is opened and the output is a first output indicating an open state of the door, the first switch is off to stop the cooling fan and the second switch is on to turn on the storage-space light. The light detector may detect the external light outside the storage space and provide the first or second output to the first and second switches.