Heat exchanger and air conditioner having the same
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Solution Overview
Problem
The formation of louvers on corrugated louver fins in heat exchangers often results in increased width after bending, leading to interference with press molds during manufacturing, which can cause the fins to become stuck and reduce heat exchange efficiency due to increased flow path resistance.
Innovation Solution
The design features fins with inclined portions connected in a zigzag form, where louvers are bent to maintain a width equal to or less than the original width, preventing interference with press molds and minimizing flow path resistance by gradually changing the air flow direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If louvers are bent to form an angle with inclined portions, then heat exchange efficiency is improved by destroying the temperature boundary layer, but the width of louvers increases causing interference with press molds and risk of fins becoming stuck
Solution Approach 1:
The patent applies preliminary action by pre-calculating and designing the louver geometry such that the width after bending is controlled to be equal to or less than the width before bending. This prevents interference with press molds during the manufacturing process while still achieving the desired louver angle for heat exchange efficiency.
Solution Approach 2:
The patent changes the geometric parameters of the louver, specifically controlling the width in the first direction after bending to be equal to or less than the width before bending. This parameter control allows the louver to achieve the necessary bending angle for destroying the temperature boundary layer without causing manufacturing issues.
2Reliability
If louver width increases after bending, then louver angle for heat exchange is achieved, but flow path resistance increases and air flow becomes restricted
Solution Approach 1:
The patent changes the geometric parameters of the louver to control the width in the first direction after bending. By maintaining the width equal to or less than the original width, the patent achieves the necessary louver angle for heat exchange efficiency while preventing excessive flow path resistance and maintaining smooth air flow.
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 prevents fins from being caught in press molds and maintains heat exchange efficiency by ensuring smooth air flow, reducing the risk of fins becoming stuck and enhancing the manufacturing process.
Implementation Method 1
the temperature boundary layer of air passing through the heat exchanger is easily destroyed by the corrugated louver fin, to thereby increasing the heat exchange efficiency
Implementation Method 2
heat transfer pipes configured to guide a refrigerant
Data Source
AI summary
Disclosed are a heat exchanger and an air conditioner including heat transfer tubes configured to guide a refrigerant, and a plurality of fins installed through which the heat transfer tubes penetrate and arranged to be spaced apart from each other in a second direction perpendicular to a first direction such that air passes through the fins in the first direction, wherein the plurality of fins each includes a plurality of inclined portions connected to each other in a zigzag form and inclined with respect to the first direction, and a plurality of louvers formed by being bent to form an angle with the inclined portions after portions of the plurality of inclined portions are cut, wherein a width of each of the plurality of louvers in the first direction after being bent is equal to or less than a width of the louvers in the first direction before being bent.