Projector Exhaust Fan Positioning for Wireless Device Cooling
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Solution Overview
Problem
Existing projectors face inefficiencies in cooling components heated to temperatures higher than the exhaust air from the cooling fan, leading to insufficient cooling and potential blockage of the exhaust port by the second controller.
Innovation Solution
A projector design where the functional device, heated to a higher temperature than the exhaust air, is positioned downstream of the exhaust fan, allowing part of the exhaust air to cool it while the remainder is exhausted through a separate port, enhancing cooling efficiency and preventing blockage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the second controller is disposed in a position facing the discharge port of the second fan to cool it, then cooling of the second controller is improved, but the exhaust port is blocked and cooling becomes insufficient
Solution Approach 1:
The exhaust system is segmented into two separate exhaust ports: a first exhaust port for exhausting air that has cooled the light source apparatus and light modulator, and a second exhaust port for exhausting air that has cooled the second controller. This segmentation allows each component to be cooled independently without blocking the exhaust path, resolving the contradiction between improving second controller cooling and maintaining exhaust port clearance.
2Volume of stationary object
If the distance between suction port and exhaust port is increased, then more components can be accommodated, but negative pressure becomes insufficient and cooling performance deteriorates
Solution Approach 1:
The cooling system is divided into separate cooling channels: a first cooling channel for the light source apparatus and light modulator, and a second cooling channel for the second controller. Each channel has its own exhaust port positioned near the respective components. This segmentation maintains effective negative pressure in each localized cooling zone while allowing the overall enclosure volume to be increased for accommodating more components.
3Temperature
If the second fan speed is increased to improve cooling of the second controller, then cooling performance is improved, but noise increases and energy consumption rises
Solution Approach 1:
The exhaust system is segmented into two separate exhaust ports with potentially different fan speeds. The second fan can operate at a lower speed since it only needs to handle the cooling airflow for the second controller, not the entire system. This segmentation reduces the noise and energy consumption associated with the second fan while still providing adequate cooling for the second controller.
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 configuration improves cooling efficiency by providing positive-pressure cooling to the functional device and other components, reducing noise by avoiding increased fan speed, and maintaining stable wireless communication by reducing obstacles for wireless communication.
Implementation Method 1
an exhaust fan that exhausts air inside the exterior enclosure out thereof through an exhaust port provided in the exterior enclosure
Implementation Method 2
part of the exhaust air discharged from the exhaust fan flows to the functional device... the functional device is heated to a temperature higher than the temperature of the exhaust air from the exhaust fan
Data Source
AI summary
A projector includes a light source apparatus, a light modulator that modulates a light flux outputted from the light source apparatus in accordance with image information, a projection lens that projects the light flux modulated by the light modulator, an exterior enclosure that accommodates the light source apparatus, the light modulator, and the projection lens, an exhaust fan (first exhaust fan) that exhausts air inside the exterior enclosure out thereof through an exhaust port (first light source exhaust port) provided in the exterior enclosure, and a functional device (wireless device) that provides a predetermined function and is heated to a temperature higher than the temperature of the exhaust air from the first exhaust fan. The wireless device is disposed in a position downstream of the first exhaust fan, and part of the exhaust air discharged from the first exhaust fan flows to the wireless device.