Cooking Appliance Automatic Door Opening for Rapid Chamber Cooling
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Solution Overview
Problem
Well-insulated cooking appliances retain heat for too long after heating elements are switched off, leading to undesirable cooking results, such as over-browning or the need for user intervention to cool the chamber, which can be inconvenient and lead to suboptimal cooking outcomes.
Innovation Solution
A method for operating a cooking appliance that automatically opens the cooking chamber door to facilitate rapid cooling, using a control device connected to an opening device to manage the door's operation, allowing for quick and controlled cooling by integrating this function into existing cooking profiles or linking it to specific cooking processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the cooking chamber is well-insulated to retain heat, then energy efficiency is improved, but the cooling time becomes excessively long
Solution Approach 1:
The door opening is divided into two stages: first a partial opening (first opening degree) to initiate cooling, then a full opening (second opening degree) for rapid cooling. This segmentation allows the system to balance energy efficiency with cooling speed by controlling the timing and extent of heat loss.
Solution Approach 2:
The door opening degree is dynamically adjusted during the cooling process. The system transitions from a closed state to a partially open state, and finally to a fully open state based on temperature conditions and timing, enabling adaptive control of the cooling rate while maintaining energy efficiency when possible.
2Manufacturing precision
If the heating elements are switched off automatically to prevent over-browning, then cooking quality is improved, but the residual heat causes further unwanted browning
Solution Approach 1:
The cooling process is initiated automatically at a predetermined time after the heating elements are switched off, or when the cooking chamber temperature reaches a predetermined value. This preliminary action prevents over-browning by removing excess heat before it can affect the food, while still allowing the food to benefit from the residual heat for proper cooking.
Solution Approach 2:
The control device monitors the cooking chamber temperature and automatically triggers the door opening mechanism when the temperature reaches a predetermined threshold or after a predetermined time. This feedback-based control ensures that cooling is activated at the optimal moment to prevent over-browning while maintaining cooking quality.
3Speed
If the cooking chamber door is opened manually to cool the chamber quickly, then cooling speed is improved, but user convenience deteriorates
Solution Approach 1:
The cooking appliance performs the cooling function automatically without requiring user intervention. The control device monitors temperature and automatically opens the door when cooling is needed, allowing the system to serve itself and eliminating the need for the user to manually open the door to achieve rapid cooling.
Solution Approach 2:
The manual mechanical action of opening the door by the user is replaced by an automated control system that uses sensors and actuators to open the door automatically. This substitution of mechanical user action with an automated control system maintains fast cooling speed while dramatically improving user convenience.
4Productivity
If the door is opened for rapid cooling, then cooling efficiency is improved, but heat loss increases
Solution Approach 1:
The door opening is segmented into stages: a partial opening first to allow gradual heat loss and initial cooling, followed by a full opening only when necessary for rapid cooling. This segmentation reduces unnecessary heat loss while still achieving the required cooling efficiency when needed.
Solution Approach 2:
The door opening occurs periodically or at specific intervals based on temperature monitoring, rather than remaining continuously open. This periodic action allows the system to maintain cooling efficiency by opening the door only when necessary, while minimizing overall heat loss by keeping the door closed during periods when cooling is not required.
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 method enables convenient and efficient cooling of the cooking chamber, preventing over-browning and reducing the need for user intervention, ensuring food safety and quality by allowing for automatic temperature regulation and quick cooling, even in well-insulated appliances.
Implementation Method 1
the cooking chamber can be cooled down particularly rapidly if, in addition to opening the cooking chamber door, a blower is used to force cold air from the environment into the cooking chamber
Implementation Method 2
the cooking chamber can be cooled down particularly rapidly if, in addition to opening the cooking chamber door, a blower is used to force cold air from the environment into the cooking chamber
Data Source
Figure 1~2
AI summary
The cooking appliance (1) has a cooking chamber (2) that is heated by a heat source. A door (4) is provided to close the cooking chamber. An opening unit is provided to open the door automatically based on control signal from a control unit. A blower is arranged in the housing (24) to direct fresh air into cooking chamber. An independent claim is included for method of operating cooking appliance.