LED Lamp Heat Dissipation Structure Using Interference Fitting

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Solution Overview

Problem

LED lamps made of plastic-metal composite materials have a small heat dissipation area, reducing their heat dissipation efficiency due to manufacturing cost considerations.

Innovation Solution

A heat dissipation structure comprising a metal base cup and top cover connected by interference fitting, with thermally conductive plastic housings that increase the heat dissipation area and efficiency, including fins for enhanced heat transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the lamp body is made of plastic-metal composite materials to reduce manufacturing cost, then the manufacturing cost is reduced, but the heat dissipation area becomes small and heat dissipation efficiency decreases

Engineering Contradiction:

Improvemanufacturing costVSAvoidheat dissipation area

Core Design Contradiction:

Ease of manufactureVSArea of stationary object

Solution Approach 1:

The lamp body is divided into multiple segments: an inner metal lamp body for heat conduction, an outer plastic lamp body for insulation and aesthetics, and heat dissipation fins extending outward. This segmentation allows each component to fulfill its specific function while working together to resolve the contradiction between cost and heat dissipation area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs a nested structure where the metal inner lamp body is positioned inside the plastic outer lamp body. The heat dissipation fins are nested between these two layers, creating a multi-layered configuration that maximizes heat dissipation surface area within a compact form factor while maintaining cost-effectiveness.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of manufacture

If the lamp body is made of plastic-metal composite materials to reduce manufacturing cost, then the manufacturing cost is reduced, but the heat dissipation efficiency decreases

Engineering Contradiction:

Improvemanufacturing costVSAvoidheat dissipation efficiency

Core Design Contradiction:

Ease of manufactureVSLoss of energy

Solution Approach 1:

The patent utilizes a composite material structure combining metal and plastic with distinct functional roles. The metal inner body provides high thermal conductivity for efficient heat transfer, while the plastic outer body offers electrical insulation and aesthetic properties. This composite approach maintains manufacturing cost benefits while significantly improving heat dissipation efficiency through the metal component and integrated heat dissipation fins.

Inventive Principle:

Principle #40Composite materials

3Area of stationary object

If heat dissipation fins are added to increase heat dissipation area, then the heat dissipation efficiency is improved, but the device complexity increases

Engineering Contradiction:

Improveheat dissipation areaVSAvoidstructural complexity

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The heat dissipation fins are merged with the lamp body structure itself rather than being separate components. The fins are formed as an integrated part of the metal inner lamp body, eliminating the need for additional assembly steps and reducing structural complexity while still achieving increased heat dissipation surface area.

Inventive Principle:

Principle #5Merging (Combining)

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 structure effectively increases the heat dissipation area while maintaining low manufacturing and assembly complexity, improving heat dissipation efficiency and light output ratio.

Implementation Method 1

The base cup and the supporting top cover are both made of metal... the base cup heat dissipation housing covers the first outer peripheral surface and attaches to the first outer peripheral surface; the top cover heat dissipation housing covers the second outer peripheral surface and attaches to the second outer peripheral surface

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

The base cup heat dissipation housing and the top cover heat dissipation housing are both made of thermally conductive plastic

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

The supporting top cover may be detachably connected to the base cup by interference fitting between the fastening part and the rim

Methodology Applied

Scientific EffectInterference fitting: Mechanical Fastener

Data Source

PatentUS11255492B2Heat dissipation structure for lamp and LED lamp

Publication Date: 2022.02.22 OPPLE LIGHTING CO LTD

AI summary

Examples of the disclosure disclose a heat dissipation structure for a lamp, which includes: a base cup, a supporting top cover, a base cup heat dissipation housing, and a top cover heat dissipation housing. The base cup and the supporting top cover are both made of metal, the supporting top cover is detachably connected to the base cup by interference fitting; and the base cup heat dissipation housing and the top cover heat dissipation housing are both made of thermally conductive plastic. In the present disclosure, the supporting top cover and the base cup are connected to each other by interference fitting to form an internal heat conduction structure; the heat is transferred to the outside by the top cover heat dissipation housing corresponding to the supporting top cover and the base cup corresponding to the base cup.