Extruded Heat Exchange Device for Freeze Dryer Miniaturization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional heat exchange devices in freeze dryers, such as evaporators and condensers, have low integration levels and large sizes, leading to inefficient energy use and increased size, which hinders miniaturization and efficiency in drying compressed air.
Innovation Solution
A heat exchange device integrally molded by extrusion with medium flow passages and fins arranged to allow airflow, enhancing heat transfer efficiency and reducing size through improved manufacturing accuracy and reduced gaps between fins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional evaporator or condenser is composed of circuitous copper tube and radiating fins welded on the copper tube, then the device can perform heat exchange function, but the integration level is low and the size is large
Solution Approach 1:
The patent merges the copper tube and radiating fins into a single integrated heat exchange component. The fins are directly formed on the copper tube surface through extrusion molding, eliminating the need for separate welding operations. This integration reduces the overall device size while maintaining the heat exchange function, directly resolving the contradiction between device size and integration level.
Solution Approach 2:
The heat exchange device serves multiple functions within a single component: it provides heat exchange surface area through the fins, maintains structural integrity through the extruded copper tube, and eliminates the need for separate assembly operations. This multi-functionality contributes to both size reduction and improved integration.
2Manufacturing precision
If traditional evaporator or condenser uses welded copper tube and fins structure, then the device can be manufactured, but the manufacturing accuracy is low and gaps between fins are large
Solution Approach 1:
The patent replaces the mechanical welding process with an extrusion molding process. Instead of welding separate copper tube and fin components, the entire heat exchange device is formed in one piece through extrusion. This substitution dramatically improves manufacturing precision by eliminating gaps between fins while maintaining ease of manufacture through a single-step成型 process.
Solution Approach 2:
The invention changes the manufacturing parameter from post-assembly welding to during-extrusion forming. By controlling the extrusion process parameters, the fins are precisely formed in their final positions with minimal gaps, achieving high manufacturing precision without increasing manufacturing complexity.
3Manufacturing precision
If the heat exchange device is integrally molded by extrusion, then the manufacturing precision is improved and device size is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The extrusion molding process is segmented into manageable stages: mold design, material preparation, extrusion forming, and post-processing. This segmentation makes the complex manufacturing process more controllable and easier to implement, reducing the perceived complexity while maintaining high manufacturing precision.
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 solution improves heat exchange efficiency, reduces device size, and enhances production efficiency while lowering costs, achieving better airflow heating or cooling and energy savings in freeze dryers.
Implementation Method 1
the compressed air enters the evaporator and exchanges heat with the refrigerant in the evaporator thin tube
Implementation Method 2
After the temperature drops, the moisture in the compressed air condenses into liquid water
Implementation Method 3
The refrigerant in the evaporator thin tube is usually cooled by condenser
Data Source
AI summary
A heat exchange device and a freeze dryer. The freeze dryer comprises a bearing device, and an evaporation device and a condensation device which are provided on the bearing device, at least one of the evaporation device and the condensation device comprising a structure of the heat exchange device. The heat exchange device is integrally molded by extrusion, and the heat exchange device is provided with at least one medium flow passage, a plurality of fins are formed on the outer periphery of the medium flow passage, and the fins being provided at intervals to form gaps allowing airflows to pass therethrough. The heat exchange device and the freeze dryer of the present disclosure can be designed to be smaller, reducing the volume, and facilitating miniaturization of products.