Double-row bent type heat exchanger and manufacturing method therefor
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Solution Overview
Problem
Conventional single-row bent heat exchangers face inefficiencies due to large bending radii and reduced heat-exchange areas within constant spaces, leading to poor performance.
Innovation Solution
A double-row bent heat exchanger design with a first and second header, where flat tubes are divided into straight and twisted segments, and fins are placed between segments, allowing for reduced header diameters and bending radii, thereby enhancing space utilization and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the width of the flat tube and outer diameter of the header are increased to increase heat-exchange capacity, then the heat-exchange capacity is improved, but the bending radius increases causing waste of space and reducing actual heat-exchange area
Solution Approach 1:
The flat tube is segmented into multiple sections (first straight section, first twisted section, second straight section, second twisted section) connected in series. This segmentation allows the refrigerant flow path to be extended within a compact space by utilizing both straight and twisted portions, thereby increasing heat-exchange capacity without requiring a large bending radius or header diameter.
2Productivity
If the width of the flat tube and outer diameter of the header are increased to increase heat-exchange capacity, then the heat-exchange capacity is improved, but the actual heat-exchange area within constant space is reduced
Solution Approach 1:
The invention utilizes the twisted sections of the flat tube to create a three-dimensional heat-exchange path. By twisting the tube in multiple directions (first and second twisted sections with different orientations), the heat-exchange area is expanded in the vertical and lateral dimensions rather than only in the horizontal plane, thereby increasing effective heat-exchange area within constant space.
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 double-row design effectively reduces the bending radius and increases the heat-exchange area, improving energy efficiency and performance by allowing for a larger flow path and enhanced refrigerant flow velocity.
Implementation Method 1
The flat tube is bent at the twisted segment around a first bending axis to provide a first bending portion
Implementation Method 2
The first header and the second header are bent around at least one second bending axis to provide at least one second bending portion
Implementation Method 3
fins disposed between adjacent first straight segments and between adjacent second straight segments
Implementation Method 4
The double-row design effectively reduces the bending radius and increases the heat-exchange area, improving energy efficiency
Data Source
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AI summary
Provided are a double-row bent type heat exchanger (1) and a manufacturing method therefor. The heat exchanger (1) comprises: a first flow collection pipe (10) and a second flow collection pipe (20), wherein the length of the second flow collection pipe (20) is less than that of the first flow collection pipe (10); flat pipes (30), wherein each of the flat pipes (30) is divided into a first straight section (31) connected to the first flow collection pipe (10), a second straight section (32) connected to the second flow collection pipe (20), and a twisting section (33) connected between the first straight section (31) and the second straight section (32); and fins (40), wherein the fins (40) are arranged between the adjacent first straight sections (31) and between the adjacent second straight sections (32). The manufacturing method comprises: bending the flat pipes (30) at the twisting sections (33) around a first bending axis (L), so as to form first bent parts (50); and bending the first flow collection pipe (10) and the second flow collection pipe (20) around at least one second bending axis (K), so as to form at least one second bent part (60).