Evaporator Pipe Layout for Uniform Cooling in Refrigerators
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Solution Overview
Problem
Existing refrigerating apparatuses with nonazeotropic refrigerant mixtures face challenges in achieving sufficient evaporation of refrigerants with lower evaporation temperatures and uniform temperature distribution within storage units, due to difficulties in bending evaporation pipes at right angles and maintaining thermal contact, leading to increased manufacturing costs and inefficient cooling.
Innovation Solution
A refrigerating apparatus design featuring a first evaporator pipe with horizontal and vertical portions that contact the inner box's side plates and curved corners, allowing for thermal contact and easy attachment without complex bending, while a second evaporator pipe meanders across the outer surface to enhance temperature uniformity and reduce manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If evaporation pipes are bent at right angles to attach to the inner box, then thermal contact is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies curvature by designing the evaporation pipe to follow a curved corner portion of the inner box rather than requiring sharp right-angle bends. This allows the pipe to naturally conform to the box geometry, maintaining thermal contact efficiency while eliminating the need for complex bending operations during manufacturing.
2Temperature
If evaporation pipes are attached in a meandering state to enhance temperature uniformity, then temperature distribution improves, but attachment complexity increases
Solution Approach 1:
The patent applies local quality by concentrating the evaporation pipe attachment at specific strategic locations (curved corner portions) rather than distributing it uniformly across all surfaces. This localized approach achieves temperature uniformity through targeted thermal contact points while keeping the overall attachment structure simple and manageable.
3Temperature
If complex bending of evaporation pipes is performed to achieve proper contact, then thermal contact is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies preliminary action by pre-designing the evaporation pipe with a configuration that inherently follows the curved corner geometry of the inner box. This preliminary design consideration eliminates the need for complex post-manufacturing bending operations, thereby reducing manufacturing costs while ensuring optimal thermal contact efficiency.
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 improves cooling efficiency, achieves better temperature uniformity inside the storage unit, and simplifies the attachment process, reducing manufacturing costs while ensuring effective evaporation of refrigerants with lower evaporation temperatures.
Implementation Method 1
a first evaporator constituted by a first evaporation pipe, the first evaporation pipe including a first portion extending a horizontal direction and a second portion extending a vertical direction... the first portion of the first evaporation pipe is disposed so as to contact to the first and second side plates and the first curved corner
Implementation Method 2
an evaporator constituted by a first evaporation pipe... evaporated by the evaporator
Implementation Method 3
the first refrigerant is a component required for compression by the compressor in the nonazeotropic refrigerant mixture and circulates through the refrigerant circuit while containing oil in the compressor
Data Source
AI summary
A refrigerating apparatus includes an insulation housing including an inner box. The inner box has first and second side plates and a first curved corner connecting the first and second side plates; and a first refrigerating circuit including a first compressor and a first evaporator constituted by a first evaporation pipe, the first evaporation pipe including a first portion extending a horizontal direction and a second portion extending a vertical direction. The first portion of the first evaporation pipe is disposed to contact to the first and second side plates and the first curved corner of the inner box, and the second portion of the first evaporation pipe is disposed outside of the first portion of the first evaporation pipe at the first curved corner so that the first portion of the first evaporation pipe locates between the first curved corner and the second portion of the first evaporation pipe.