Gas Discharge Lamp Cooling via Segmented Airflow Duct
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Solution Overview
Problem
Ultra high pressure mercury lamps in projectors require precise temperature control to prevent burning damage and extend lifespan, as existing cooling methods fail to maintain optimal temperature ranges for both the bulb and burner components.
Innovation Solution
An illuminance device incorporating a gas discharge lamp, an airflow generator, and a distributing duct that provides cooling airflow to both the front and rear parts of the lamp, ensuring simultaneous cooling of the bulb and burner, thereby maintaining temperatures within a normal operational range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling airflow is provided to the gas discharge lamp, then the temperature of the bulb and burner is decreased, but the temperature distribution becomes uneven causing burner overheating
Solution Approach 1:
The cooling airflow is divided into two separate paths: a first cooling airflow directed to the front surface of the bulb through a first opening, and a second cooling airflow directed to the rear surface of the bulb and burner through a second opening. This segmentation allows independent temperature control of different components, preventing burner overheating while maintaining bulb cooling efficiency.
Solution Approach 2:
Different regions of the gas discharge lamp are provided with different cooling characteristics. The front surface of the bulb receives one cooling airflow pattern, while the rear surface and burner receive a different cooling airflow pattern. This local differentiation ensures that each component operates within its optimal temperature range, extending lamp lifespan.
2Temperature
If cooling airflow is increased to cool the burner, then the burner temperature is decreased, but the cooling airflow distribution becomes inefficient
Solution Approach 1:
The cooling airflow is segmented into dedicated streams for different components. A portion of the cooling airflow is directed through the first opening to cool the bulb, while another portion is directed through the second opening to cool the burner. This segmentation eliminates wasted airflow and ensures efficient heat removal from each component.
Solution Approach 2:
The distributing duct acts as an intermediary that receives cooling airflow from the airflow generator and intelligently distributes it to different openings. The duct structure with its specific opening areas and flow paths ensures optimal airflow distribution to both the bulb and burner, maximizing cooling efficiency.
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 effectively prolongs the lifespan of the gas discharge lamp by ensuring both the bulb and burner are cooled efficiently, maintaining optimal temperatures and improving the utilization efficiency of the cooling airflow.
Implementation Method 1
an airflow generator (120), and a distributing duct (130). The airflow generator is capable of providing a cooling airflow
Data Source
AI summary
An illuminance device including a gas discharge lamp, an airflow generator, and a distributing duct is provided. The lamp has a reflector, a base connected to the reflector, a burner installed in the reflector, and the base, a first opening located at the reflector and a front part of the lamp, and a second opening located at a rear part of the lamp and exposing the burner. The distributing duct has an inlet, a first outlet, and a second outlet, and an opening area of the first outlet is larger than that of the second outlet. A cooling airflow provided by the airflow generator enters the distributing duct via the inlet, the distributing duct guides a part of the cooling airflow to the first opening via the first outlet, and the distributing duct guides another part of the cooling airflow to the second opening via the second outlet.