Cooking Appliance With Counterweighted Movable Heater
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Solution Overview
Problem
Conventional cooking appliances with link-type elevating systems face issues such as imprecise heater movement, electromagnetic wave leakage, increased motor load, and safety risks due to inadequate crash prevention and load management.
Innovation Solution
A cooking appliance with a vertically movable heater system, equipped with a pulling kit that includes a pulling hook, force member, and pulling rail to assist the heater's vertical movement, reducing motor load and shielding electromagnetic waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a link-type elevating system is used to move the heater vertically, then the heater can be positioned at different heights for cooking, but the motor load increases significantly when heavy load is applied
Solution Approach 1:
The patent introduces a counterweight mechanism where a counterweight block is suspended by a cable on the opposite side of the heater assembly. This counterweight system balances the gravitational force on the heater, significantly reducing the motor load required to move the heater vertically. The counterweight effectively cancels out the weight of the heater assembly, allowing the motor to only overcome friction and acceleration forces rather than the full gravitational load.
2Use of energy by moving object
If the heater descends by its own weight for thawing food, then energy consumption is reduced, but the heater movement becomes imprecise and crash prevention is insufficient
Solution Approach 1:
The patent incorporates position detection sensors that continuously monitor the heater assembly's vertical position and provide feedback to the control system. This feedback mechanism enables precise control of the heater's descent and ascent, allowing the system to accurately stop at predetermined positions for different cooking modes. The control system can adjust motor output based on real-time position data, ensuring precise positioning while maintaining energy efficiency.
Solution Approach 2:
The system transitions from a passive gravitational descent to an actively controlled dynamic movement system. The motor can precisely regulate the descent speed and stopping position, enabling the heater to reach exact positions for thawing, cooking, or storage modes. This dynamic control replaces the imprecise free-fall descent with a controllable movement mechanism that maintains energy efficiency while achieving accurate positioning.
3Productivity
If the heater moves vertically inside the cooking chamber, then heating efficiency is improved by minimizing heat loss, but electromagnetic wave leakage risks increase
Solution Approach 1:
The patent employs a nested shielding structure where an electromagnetic wave shielding cover is integrated around the heater assembly. This shielding cover moves together with the heater as it ascends and descends, creating a nested configuration where the heater is contained within the shielding structure. This nested arrangement maintains electromagnetic wave containment throughout the heater's vertical movement, preventing leakage while allowing the heater to reach optimal positions for efficient heating.
4Force
If a pulling kit is added to assist the movable heater system, then motor load is reduced, but device complexity increases
Solution Approach 1:
The pulling kit is implemented as a counterweight system with a cable and pulley mechanism that is integrated into the existing heater support structure. The counterweight block is suspended on the opposite side of the heater assembly, and the cable runs through guide pulleys that are part of the frame structure. This integration approach minimizes additional complexity by utilizing existing structural elements rather than adding completely separate components.
Solution Approach 2:
The pulling kit's cable and pulley system serves multiple functions: it provides the counterweight effect to reduce motor load, guides the heater assembly's vertical movement, and can be integrated with the electromagnetic shielding structure. By designing the pulling mechanism to fulfill multiple roles, the patent reduces overall system complexity despite adding the counterweight function.
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 allows for efficient heating by minimizing heat loss and cooking time, reduces motor load through assisted operation, and prevents electromagnetic wave leakage by using an insulating member.
Implementation Method 1
a force member that applies a unidirectional force to the pulling hook; A force member consists of a tension spring
Implementation Method 2
Another object of the present disclosure is to provide a cooking appliance configured to efficiently shield electromagnetic waves through perimeter of a heater system that ascends and descends
Implementation Method 3
a heater provided on one side portion of the casing to generate heat
Data Source
AI summary
The present disclosure relates to a cooking appliance equipped with a pulling kit that lifts a heater moving up and down inside a cooking chamber. The cooking appliance according to the present disclosure comprises: a casing in which a cooking chamber is provided; a door rotatably provided at one portion of the casing configured to open and close the cooking chamber; a heater provided on one side portion of the casing to generate heat; a movable heater system provided on one side portion of the casing to allow the heater to move inside the cooking chamber; and a pulling kit provided on one side portion of the casing to help the movable heater system to move. The cooking appliance has the advantage of improving cooking efficiency and preventing malfunction or damage to parts.