Oven
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Solution Overview
Problem
Conventional ovens face challenges with door cooling efficiency due to the use of multiple sheets of glass, which increase weight, complicate cleaning, and limit the venturi effect, while high-temperature water vapor discharge during opening poses user hazards.
Innovation Solution
The oven design incorporates a cooling guide that maximizes the venturi effect by narrowing the air flow path and minimizes the number of glass sheets, along with an air guide that redirects high-temperature vapor downwards when the door is open, using a solenoid valve and sensor-controlled movement unit to adjust the air guide's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple sheets of glass are used to form the door, then the door can withstand high-temperature heat, but the overall weight of the oven increases and cleaning becomes inconvenient
Solution Approach 1:
The patent removes the intermediate glass layer from the door structure, extracting only the essential components (inner glass and outer glass) needed for heat resistance while eliminating the excess weight and cleaning complexity introduced by the intermediate layer
2Temperature
If multiple sheets of glass are used to form the door, then the door can withstand high-temperature heat, but the venturi effect is limited
Solution Approach 1:
By removing the intermediate glass, the patent eliminates the obstruction to air flow, allowing the cooling guide to effectively narrow the flow path and generate a strong venturi effect for improved cooling efficiency
Solution Approach 2:
The patent applies local quality by creating a specific narrow flow path region through the cooling guide at the critical location where air is ejected, concentrating the cooling effect where it is most needed while maintaining overall door integrity
3Productivity
If the cooling guide narrows the flow path to generate venturi effect, then cooling efficiency improves, but the air flow that passes through the door may be disturbed
Solution Approach 1:
The cooling guide is positioned to affect only the locally ejected air flow, creating a narrow path precisely where cooling is needed without interfering with the broader air flow patterns that move through the door structure
Solution Approach 2:
The patent segments the air flow into two distinct paths: one through the cooling guide for intensive local cooling, and another through the door structure for overall air circulation, allowing both functions to operate independently without interference
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 configuration enhances door cooling efficiency, reduces the number of glass sheets, and effectively diffuses high-temperature vapor downwards, ensuring user safety and improved operational convenience.
Implementation Method 1
A cooling guide is installed at an ejection hole of air ejected by the cooling fan and narrows the width of the flow path so as to generate the venturi effect
Implementation Method 2
The door cooling unit inhales external air using a cooling fan, ejects the inhaled air to the outside, and generates a flow of air inside the door
Data Source
AI summary
An oven that effectively cools a door by adjusting a position of a cooling guide includes a casing having at least one inhalation hole and at least one ejection hole; a cooking chamber which has an opening and is placed inside the casing; a door that is rotatably coupled to one portion of the casing so as to open/close the opening; a cooling fan that discharges air introduced into the inhalation hole to the ejection hole placed at a front portion of the casing; and an air guide that is installed adjacent to the ejection hole so as to change a direction of air driven by the cooling fan. The cooling guide is installed not to disturb the flow of air that passes through the door so that the door using minimum sheets of glass can be provided.