Laminate-type header, heat exchanger, and air-conditioning apparatus
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Solution Overview
Problem
Existing laminated headers struggle to maintain uniform refrigerant flow rates across outlet passages due to environmental and gravitational influences, making it difficult to operate under various conditions.
Innovation Solution
The laminated header adjusts the curvature radius of bending portions in outflow passages to control the distribution ratio of refrigerant flow, allowing for uniform flow rates by varying the curvature radii of outer and inner wall surfaces in branching flow passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the laminated header uses a conventional branching flow passage with uniform structure, then the device complexity is low and manufacturing is easy, but the distribution ratio of refrigerant flow cannot be adjusted, causing non-uniform flow rates under various usage conditions
Solution Approach 1:
The patent applies local quality by varying the curvature radius of bending portions at specific locations within the branching flow passage. Different outflow passages have bending portions with different curvature radii, creating localized structural variations that adjust refrigerant distribution ratios for each outlet while maintaining an overall simple laminated header structure.
Solution Approach 2:
The patent changes the geometric parameter of the branching flow passage by varying the curvature radius of bending portions in different outflow passages. This parameter modification allows control over refrigerant flow distribution ratios, enabling the system to adapt to different usage conditions without fundamentally changing the device structure.
2Adaptability or versatility
If the laminated header has fixed curvature radius in outflow passages, then the manufacturing precision requirement is low, but the flow distribution cannot be optimized for different usage environments
Solution Approach 1:
The patent implements local quality by specifying different curvature radii for bending portions in different outflow passages. This localized differentiation allows the system to adapt to various usage conditions while maintaining manufacturability, as only specific local regions require precision control rather than the entire structure.
Solution Approach 2:
The patent modifies the curvature radius parameter of bending portions to optimize refrigerant flow distribution. By controlling this geometric parameter in different outflow passages, the system achieves adaptability to various usage environments while the precision requirement remains manageable through focused control on specific critical dimensions.
3Productivity
If the laminated header uses variable curvature radius in outflow passages, then the refrigerant flow distribution can be optimized, but the device complexity increases
Solution Approach 1:
The patent applies local quality by introducing variable curvature radii only in the bending portions of outflow passages where flow distribution optimization is needed. This localized approach improves heat exchange efficiency by optimizing refrigerant distribution to heat exchange components while avoiding unnecessary complexity in other parts of the header.
Solution Approach 2:
The patent changes the curvature radius parameter in outflow passages to optimize refrigerant flow distribution and improve heat exchange efficiency. The variable parameter design allows tailored flow control to match the thermal requirements of different heat exchange components without requiring a complete redesign of the entire header structure.
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 adjustment effectively sets the distribution ratio of refrigerant flow, enhancing heat exchange efficiency and allowing the laminated header to function under diverse conditions by minimizing pressure loss and optimizing flow rates.
Implementation Method 1
a curvature radius of one bending portion formed in one outflow passage or a curvature radius of a bending portion having a largest bending angle among a plurality of bending portions formed in the one outflow passage is different from a curvature radius of one bending portion formed in at least one outflow passage different from the one outflow passage or a curvature radius of a bending portion having a largest bending angle among a plurality of bending portions formed in the at least one outflow passage different from the one outflow passage
Data Source
Figure 1~2
Figure 3(a)~5
Figure 6(a)~6(d)
AI summary
A laminated header (2) according to the present invention includes: a first plate-like body (11) having a plurality of first outlet flow passages (11 A) formed therein; and a second plate-like body (12) laminated on the first plate-like body (11), the second plate-like body (12) having a distribution flow passage (12A) formed therein, the distribution flow passage (12A) being configured to distribute refrigerant, which passes through a first inlet flow passage (12a) to flow into the second plate-like body (12), to the plurality of first outlet flow passages (11A) to cause the refrigerant to flow out from the second plate-like body (12). A branching flow passage (12b) of the distribution flow passage (12A) includes: a branching portion; an inflow passage extending toward the branching portion; and a plurality of outflow passages extending from the branching portion in directions different from each other. Curvature radii of bending portions of the plurality of outflow passages are different from each other.