LED Lighting Device Heat Dissipation via Segmented Cooling
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Solution Overview
Problem
Conventional LED lighting devices face challenges in efficiently discharging heat while preventing accidents from flammable foreign objects and maintaining luminous efficiency, as forced cooling methods can introduce dust and reduce performance.
Innovation Solution
A lighting device with a lens unit covering the light source, where the light source is supported by a high heat-conductive member and heat is dissipated through air inlets/outlets, using a heat sink member with protruding fins and a fan motor to generate a forcing air flow for efficient heat discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If forced cooling method is used with fan motor and air flow path, then heat discharge efficiency is improved, but dust and foreign objects enter the flow path causing accidents or performance degradation
Solution Approach 1:
The invention divides the cooling function into two separate systems: (1) a sealed cooling chamber that contains the light source and prevents foreign object entry, and (2) external air flow paths that provide cooling without contacting the light source. The housing is segmented into a sealed cooling chamber and an unsealed exterior, allowing heat dissipation while maintaining protection.
Solution Approach 2:
The patent introduces heat dissipation fins as an intermediary between the light source and the external environment. These fins conduct heat from the light source to the air flow paths without requiring direct exposure of the light source to external air, thus preventing foreign object contamination while maintaining effective heat dissipation.
2Temperature
If light source is exposed to external air for natural cooling, then heat dissipation is improved, but cooling efficiency is insufficient for high power output
Solution Approach 1:
The invention uses forced air flow through pneumatic principles, employing a fan motor to drive air through designated flow paths that contact heat dissipation surfaces. This forced convection system provides sufficient cooling capacity for high power LED modules, overcoming the limitations of natural convection.
Solution Approach 2:
The patent extends heat dissipation into multiple dimensions by providing air flow paths that approach the light source from multiple directions (front, rear, and side flow paths). This multi-dimensional cooling approach increases heat exchange efficiency without requiring direct exposure of the light source.
3Temperature
If conventional aluminum die-casting heat sink is used, then heat dissipation is effective, but device weight increases and manufacturing cost rises
Solution Approach 1:
The invention employs composite material construction for the housing, combining materials with different properties to achieve both heat dissipation effectiveness and weight reduction. The housing includes a resin material base with integrated heat dissipation fins, potentially using materials optimized for both thermal management and light weight.
Solution Approach 2:
The patent merges the housing structure with the heat dissipation function by integrating heat dissipation fins directly into the housing body. This consolidation eliminates the need for separate heavy heat sink components, achieving both weight reduction and effective heat dissipation through a unified 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
The solution enables efficient heat dissipation from the light source, preventing foreign object contact and dust accumulation, thus maintaining stable performance and reducing material costs while enhancing cooling efficiency.
Implementation Method 1
the light source is supported on a leading end-side surface of a light source support stand formed by a high heat-conductive member
Implementation Method 2
heat generated at the light source is discharged by an air flow generated inside and outside the housing through the air inlets/outlets
Implementation Method 3
provide a heat sink member formed by a high heat-conductive member in a protruding state on the base end-side surface of the light source support stand, thereby to discharge heat generated at the light source
Implementation Method 4
discharge heat generated at the light source by the air flow from the base end-side surface of the light source support stand and the heat sink member
Data Source
AI summary
A lighting device that allows efficient heat discharge from a light source while avoiding accidents such as firing due to a flammable foreign object in contact with the light source or the like and failures such as reduction in luminous efficiency due to dust or the like adhered to and accumulated on the internal surface of a lens unit.