Vacuum Adiabatic Refrigerator Body With Heat-Blocking Wall Structure
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Solution Overview
Problem
Current methods for achieving a sufficient adiabatic effect in refrigerators using vacuum adiabatic bodies face challenges in maintaining a stable vacuum state, preventing heat transfer at temperature contact points, and resisting deformation due to sound pressure, limiting their application to general household refrigerators.
Innovation Solution
A vacuum adiabatic body design incorporating a conductive resistance sheet, radiation resistance sheets, and a supporting unit to maintain a vacuum state and reduce heat transfer, with an exhaust port for gas removal, and a side frame to enhance structural stability and adiabatic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a vacuum adiabatic body is applied to increase internal volume, then the internal volume of the refrigerator is increased, but heat transfer at contact portions between external and internal cases cannot be prevented
Solution Approach 1:
A conductive resistance sheet is introduced as an intermediary component at the contact portions between the external and internal cases. This sheet acts as a thermal barrier that prevents direct heat conduction through the contact points, thereby reducing energy loss while preserving the vacuum adiabatic structure's volume benefits
Solution Approach 2:
The conductive resistance sheet is specifically applied at the contact portions where heat transfer occurs, rather than uniformly across the entire structure. This localized approach addresses the specific heat transfer problem at contact points without compromising the overall vacuum adiabatic performance or internal volume
2Loss of energy
If the walls are provided to be in a sufficient vacuum state, then adiabatic effect is improved, but it is difficult to maintain a stable vacuum state and prevent deformation due to sound pressure
Solution Approach 1:
The vacuum degree inside the adiabatic body is controlled to be within a specific range (10^-3 to 10^-7 Pa) rather than achieving complete vacuum. This parameter optimization balances adiabatic performance with structural stability, preventing deformation while maintaining sufficient vacuum effect
Solution Approach 2:
A supporting unit is installed within the vacuum space to provide structural reinforcement before vacuum deformation can occur. This supporting structure acts as a cushion against the pressure differential, preventing case deformation while allowing the vacuum state to be maintained
3Loss of energy
If a foam filling material is used to provide adiabatic walls, then adiabatic performance is improved, but manufacturing cost is increased and manufacturing method is complicated
Solution Approach 1:
The complex foam filling process is replaced by extracting the adiabatic function into a vacuum space between the external and internal cases. This eliminates the need for foam material and complex filling operations, simplifying manufacturing while maintaining adiabatic performance
Solution Approach 2:
Instead of using physical foam material to achieve adiabatic effect, the invention creates a vacuum copy of the adiabatic barrier. The vacuum space replicates the thermal insulation function of foam without requiring the material or complex filling processes
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 design achieves a stable and sufficient adiabatic effect, preventing dew formation on the outer surface and ensuring structural stability, while optimizing internal volume and energy efficiency in refrigerators.
Implementation Method 1
a vacuum space part (50) provided between the first plate member (10) and the second plate member (20), and being in a vacuum state
Implementation Method 2
a vacuum adiabatic body, which can obtain a sufficient adiabatic effect in a vacuum state
Implementation Method 3
a heat resistance unit for decreasing a heat transfer amount between the first plate member and the second plate member... a conductive resistance sheet capable of resisting heat conduction flowing along a wall for the third space
Implementation Method 4
a heat resistance unit... and at least one radiation resistance sheet provided in a plate shape inside the third space
Data Source
AI summary
A vacuum adiabatic body includes: a first plate member; a second plate member; a sealing part sealing the first plate member and the second plate member to provide a third space in a vacuum state; a supporting unit; a heat resistance unit for decreasing a heat transfer amount between the first plate member and the second plate member; and an exhaust port through which a gas in the third space is exhausted. The heat resistance unit includes a conductive resistance sheet capable of resisting heat conduction flowing along a wall for the third space, and a side frame fastened to the conductive resistance sheet to define at least one portion of the wall for the third space. Accordingly, a vacuum adiabatic body may be capable of resisting heat conduction.