Cooling device and projector that changes pressure and circulation speed of a cooling gas based on a determined pressure of the cooling gas
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Solution Overview
Problem
Projector cooling systems face inefficiencies due to fluctuations in ambient temperature affecting air pressure and thermal conductivity, leading to inadequate cooling of heat-sensitive components and potential gas leaks without detection mechanisms.
Innovation Solution
A cooling device using helium gas with higher thermal conductivity than air, a partition wall for circulation, and a control system that adjusts pressure and circulation speed based on pressure determinations to maintain thermal conductivity and detect leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air is used as cooling gas in a closed space with circulation fan, then the cooling system can operate simply, but the cooling efficiency deteriorates when ambient temperature fluctuates causing pressure changes
Solution Approach 1:
The patent changes the physical parameter of the cooling gas from ordinary air to a gas with higher thermal conductivity (such as helium or neon). This parameter change ensures that the cooling efficiency remains stable even when ambient temperature fluctuates, because the superior thermal conductivity of the selected gas compensates for pressure variations, maintaining reliable heat transfer performance.
Solution Approach 2:
The patent introduces a pressure detection mechanism that monitors the internal pressure of the closed space and provides feedback to the control unit. When pressure changes are detected (indicating potential gas leakage), the system can alert users or adjust operation, ensuring cooling efficiency is maintained by detecting and responding to conditions that would otherwise degrade performance.
2Ease of operation
If the circulation fan operates at constant speed, then the system is simple to control, but heat transfer becomes insufficient when cooling gas pressure drops
Solution Approach 1:
The patent makes the circulation fan's operation dynamic by controlling its rotation speed based on detected cooling gas pressure. When pressure is normal, the fan operates at standard speed; when pressure drops (indicating potential leakage), the system can adjust fan speed accordingly. This dynamic control maintains optimal heat transfer performance across varying pressure conditions while remaining relatively simple to implement through basic speed adjustment.
3Device complexity
If airtightness is not monitored, then the system requires fewer sensors and is simpler, but gas leakage goes undetected causing cooling deficiencies
Solution Approach 1:
The patent implements a pressure detection mechanism that continuously monitors the internal pressure of the closed space and provides feedback to the control unit. This feedback system enables detection of gas leakage by identifying pressure changes, allowing the system to maintain reliable cooling performance by alerting users or adjusting operation when leakage is detected, without requiring complex sensor arrays.
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 system maintains high cooling efficiency by stabilizing thermal conductivity and promptly detects leaks, preventing deficiencies in projector performance and extending component lifespan.
Implementation Method 1
a Peltier element that transfers heat according to application of a voltage is used. As the Peltier element, a heat absorbing section is disposed in the closed space to transfer the heat of the air in the closed space to a heat radiating section disposed outside the closed space.
Implementation Method 2
a cooling system in which a thermoelectric conversion element (a heat transfer element), a circulation fan, and an optical component such as a liquid crystal panel serving as a cooling target are disposed in a closed space and the air in the closed space is circulated by the circulation fan to cool the cooling target
Data Source
AI summary
A cooling device that can maintain or improve a cooling ability without being affected by fluctuation in an ambient temperature. Gas is supplied to a cooling target to cool the cooling target. A cooling device includes a cooling gas including gas having thermal conductivity higher than the thermal conductivity of the air, a partition wall that closes and stores the cooling target and the cooling gas and is capable of circulating the cooling gas, a cooling section that cools and circulates the cooling gas, a pressure determining section that determines the pressure of the cooling gas, and a cooling control section that controls the cooling section. The cooling control section causes the cooling section to change the pressure of the cooling gas and/or change the circulation speed of the cooling gas on the basis of a result of the determination of the pressure determining section.