Vehicular Lamp Heat Dissipation via Integrated Metal Platform
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Solution Overview
Problem
Conventional vehicular LED lamps face inefficiencies in heat dissipation due to indirect heat conduction, leading to reduced performance and increased weight, which hampers energy efficiency and longevity.
Innovation Solution
A vehicular lamp design featuring a housing with a metal heat dissipating portion and a lightweight plastic front portion, where the light-emitting diode unit's heat is directly conducted to the platform integrated with the rear metal portion, eliminating the need for additional heat conducting members, and incorporating a vent for improved air circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LEDs are fixed on a cooling block for indirect heat conduction to the housing, then the housing can protect the reflective cover, but the heat dissipating efficiency is reduced due to indirect heat conduction
Solution Approach 1:
The cooling block is merged with the housing by making the housing integrally formed with the cooling block. This integration eliminates the need for separate heat conduction paths and components, allowing heat to be directly conducted from the LEDs through the cooling block to the housing, thereby improving heat dissipating efficiency while reducing structural complexity.
2Temperature
If the housing is made of metal with good strength and thermal dissipation properties, then heat dissipation is improved, but the weight of the vehicular lamp increases
Solution Approach 1:
The housing is segmented into two distinct portions: a rear portion made of metal for heat dissipation and a front portion made of lightweight plastic for weight reduction. This segmentation allows each portion to be optimized for its specific function - the metal rear portion handles thermal management while the plastic front portion reduces overall weight, resolving the contradiction between heat dissipation capability and weight.
3Temperature
If a cooling block is used for heat dissipation, then LED cooling is achieved, but additional components increase the device complexity and weight
Solution Approach 1:
The cooling block is merged with the housing by making the housing integrally formed with the cooling block. This integration eliminates the need for separate heat conduction paths and components, allowing heat to be directly conducted from the LEDs through the cooling block to the housing, thereby improving heat dissipating efficiency while reducing structural complexity.
4Loss of energy
If the entire housing is made of metal, then heat dissipation is maximized, but the weight reduction goal for energy-saving is compromised
Solution Approach 1:
The housing is segmented into two distinct portions: a rear portion made of metal for heat dissipation and a front portion made of lightweight plastic for weight reduction. This segmentation allows each portion to be optimized for its specific function - the metal rear portion handles thermal management while the plastic front portion reduces overall weight, resolving the contradiction between heat dissipation capability and weight.
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
Enhances heat dissipation efficiency, prolongs the service life of LEDs, reduces the overall weight of the lamp, and contributes to energy savings and reduced vehicle weight.
Implementation Method 1
A light-emitting diode unit includes a plurality of light-emitting diodes fixed to the coupling portion and a circuit board fixed to the coupling portion. The plurality of light-emitting diodes is adapted to emit light rays towards the reflective face of the reflective cover.
Implementation Method 2
The reflective cover is mounted in the chamber of the housing and includes a recessed portion in a center thereof. The recessed portion has a rear end with an opening. The platform extends through the opening, and the coupling portion is received in the recessed portion. The recessed portion includes a reflective face.
Implementation Method 3
The housing includes a heat dissipating portion made of metal. The platform includes a coupling portion. The platform extends through the opening, and the coupling portion is received in the recessed portion. The heat generated by the LEDs can directly be conducted to the platform integrally formed with the rear portion of the housing without the need of an additional heat conducting member.
Implementation Method 4
The rear portion forms the heat dissipating portion. A plurality of fins is provided on the rear face. The platform is integrally formed with the front face of the rear shell plate.
Data Source
AI summary
A vehicular lamp includes a housing having a chamber. The housing includes a heat dissipating portion made of metal. The housing further includes a platform integrally formed with the heat dissipating portion. The platform includes a coupling portion. A reflective cover is mounted in the chamber and includes a recessed portion in. The recessed portion has a rear end with an opening. The platform extends through the opening, and the coupling portion is received in the recessed portion. The recessed portion includes a reflective face. A light-emitting diode unit includes a plurality of light-emitting diodes fixed to the coupling portion and a circuit board fixed to the coupling portion. The light-emitting diodes emit light rays towards the reflective face of the reflective cover. A shield is mounted in front of the housing and is transmittable to the light rays.