Turntable Motor Cooling Layout in Built-In Heating Cookers
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Solution Overview
Problem
Conventional heating cookers face increased costs due to the need for heat-resistant motors and additional cooling ducts to manage heat around the turntable motor, which is placed between the heating chamber and the casing.
Innovation Solution
A heating cooker design that incorporates a cooling fan to circulate air through the space between the casing and the built-in storage unit, effectively cooling the turntable motor without requiring high-temperature resistant motors or additional cooling ducts, using a simple structure at a low cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the turntable motor is placed below the heating chamber and below the casing, then the motor can be positioned in a space-efficient location, but the motor is exposed to high temperatures from the heating chamber
Solution Approach 1:
The cooling system is segmented into multiple air flow paths: ambient air enters through the front, passes through the turntable motor area, and is discharged through the back. This segmentation allows different regions to have different temperature zones, cooling the motor without interfering with the heating chamber's high temperature operation.
Solution Approach 2:
The cooling air flow is localized to the turntable motor area. The air circulation system creates a localized cool environment around the motor while the heating chamber maintains its high temperature independently. This local quality differentiation resolves the temperature conflict.
2Reliability
If heat-resistant motors and additional cooling ducts are used to protect the turntable motor from heat, then the motor reliability is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The turntable motor cools itself by utilizing the natural air circulation created by the heating chamber's operation. The heating chamber's exhaust air flow and the cooling fan work together to create a self-sustaining cooling system that eliminates the need for additional dedicated cooling ducts or heat-resistant motor modifications.
Solution Approach 2:
The air circulation system serves multiple functions: it cools the turntable motor, maintains proper air flow within the casing, and works in conjunction with the heating chamber's ventilation. This multi-functionality reduces the need for separate dedicated cooling components.
3Reliability
If heat-resistant motors and additional cooling ducts are used to protect the turntable motor from heat, then the motor reliability is improved, but the manufacturing cost increases
Solution Approach 1:
Instead of using expensive heat-resistant motors, the invention uses a standard motor that can be easily replaced if needed. The cooling system provides sufficient protection for the motor's operational lifetime, and the standard motor is significantly cheaper than a heat-resistant alternative.
Solution Approach 2:
The harmful heat from the heating chamber is effectively extracted and separated from the motor area through the air circulation system. By taking out the heat from the motor's environment, the motor can use standard, cost-effective components rather than expensive heat-resistant materials.
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 design allows for effective cooling of the turntable motor, reducing costs and improving reliability by utilizing a less expensive motor and enhancing cooling efficiency through a straightforward and cost-effective approach.
Implementation Method 1
a cooling fan arranged and configured such that in a state that the casing is mounted within the built-in storage unit, the cooling fan circulates air, taken in from a front side of the casing, through a space between a lower face of the casing and a bottom face of the built-in storage unit to supply the air into the casing
Data Source
AI summary
A heating cooker includes a heating chamber provided within a casing, a turntable placed at a bottom of the heating chamber, a turntable motor for driving the turntable to rotate, the turntable motor being placed below the heating chamber and below the casing, and a cooling fan for circulating air, taken in from a front side of the casing, through a space between a lower face of the casing and a bottom face of the built-in storage unit to supply the air into the casing, in a state that the casing is mounted within the built-in storage unit. Thus, a heating cooker capable of effectively cooling the turntable motor at a low cost with a simple configuration.