Ultra low-temperature freezer
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Solution Overview
Problem
Ultra-low temperature freezers with door hinges mounted on one side cause the door to easily contact adjacent objects when opened, due to the rotation center being positioned on that side, leading to interference issues.
Innovation Solution
The ultra-low temperature freezer design incorporates a hinge system with a pivot extending perpendicularly, where the first hinge piece is mounted to the second side of the housing and the second hinge piece to the outer door, featuring a connecting face that is either a flat surface or a recessed surface to prevent contact with adjacent objects, utilizing vacuum insulated panels and polyurethane for thermal insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the hinge is mounted to the first side of the housing, then the door can be opened and closed, but the door easily comes into contact with objects next to the first side
Solution Approach 1:
The patent moves the hinge mounting from the first side (left or right side) to the second side (front side facing the opening direction). This spatial repositioning changes the rotation axis location, allowing the door to swing away from adjacent objects rather than toward them, thus preventing contact while maintaining operability
Solution Approach 2:
The patent introduces a buffer member (such as a bumper or cushion) at the first side of the door to act as an intermediary between the door and adjacent objects. This buffer member prevents direct contact and potential damage while allowing the door to reach its full opening range
2Device complexity
If the rotation center of the door is disposed on the first side, then the hinge structure is simplified, but the door interferes with adjacent objects
Solution Approach 1:
The patent relocates the rotation center from the first side to the second side (front side), changing the spatial dimension of the rotation axis. This repositioning allows the door to rotate in a path that avoids adjacent objects while maintaining a relatively simple hinge structure
Solution Approach 2:
The buffer member serves as an intermediary that prevents interference with adjacent objects. It is positioned at the first side of the door to provide cushioning and prevent direct contact, thus resolving the interference issue without complicating the hinge structure
3Area of stationary object
If the door is positioned close to walls or other units, then space utilization is improved, but the door contact problem worsens
Solution Approach 1:
By moving the hinge to the front side (second side) and changing the rotation axis position, the door swings in a different arc that clears adjacent objects. This allows the freezer to be positioned closer to walls or other units without the door contacting them, thus improving space utilization
Solution Approach 2:
The buffer member acts as a protective intermediary that prevents door contact with adjacent objects even when the freezer is positioned in tight spaces. This allows maximum space utilization while preventing harmful contact
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 effectively suppresses interference with adjacent objects, maintaining thermal insulation performance while allowing easier access and installation, even when the freezer is positioned closely to walls or other units.
Implementation Method 1
a thermal insulator provided between the exterior body and the interior body, the thermal insulator being formed of a vacuum insulated panel
Implementation Method 2
polyurethane provided between the thermal insulator and the interior body
Data Source
AI summary
An ultra low-temperature freezer includes: a casing that includes an exterior body having a first side surface and a second side surface laterally facing each other, an interior body, a heat insulation material, an evaporator, and a polyurethane; a hinge that includes a first hinge piece and a second hinge piece, with the first hinge piece being attached to the second side surface; and an outer door that has a third side surface and a fourth side surface facing the third side surface, with the second hinge piece being attached to the fourth side surface. The outer door includes an inner surface and an outer face provided forward of the inner surface, a heat insulation material including a vacuum heat insulation panel provided to the inner surface side, and a polyurethane provided between the heat insulation material and the outer face.