Projector Cooling Apparatus with Dual Evaporators
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Solution Overview
Problem
Existing projectors face complex installation issues due to the configuration of coolant paths and components, which complicates the cooling process and affects the temperature management of laser heat absorbers and light sources.
Innovation Solution
A projector design with separate cooling targets and compressors operating at different temperatures, utilizing a dual-evaporator system to manage heat from light sources and light modulators, allowing for efficient temperature control and reduced installation complexity by integrating the cooling apparatus within the projector housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cooling apparatus is integrated within the projector housing, then installation simplicity is improved and device size is reduced, but temperature management complexity increases due to multiple cooling targets with different temperature requirements
Solution Approach 1:
The cooling apparatus is segmented into multiple evaporators (first evaporator for light source cooling, second evaporator for light modulator cooling) that can operate independently at different temperatures. This segmentation allows each evaporator to be optimized for its specific cooling target while maintaining a compact integrated structure, resolving the contradiction between installation simplicity and temperature management complexity.
Solution Approach 2:
Different regions of the cooling apparatus provide different cooling characteristics - the first evaporator provides cooling at a first temperature for the light source, while the second evaporator provides cooling at a second temperature for the light modulator. This local quality differentiation enables the integrated apparatus to meet diverse temperature requirements without increasing overall installation complexity.
2Manufacturing precision
If separate evaporators are used for light source and light modulator cooling, then temperature control precision is improved, but device complexity increases
Solution Approach 1:
Multiple evaporators with different cooling functions are merged into a single integrated cooling apparatus that shares common components such as the compressor, condenser, and expansion valves. This merging approach achieves precise temperature control for both light source and light modulator while avoiding the complexity of completely separate cooling systems, as the shared components reduce overall system complexity.
3Volume of moving object
If the projector uses a compact integrated cooling system, then device size is reduced, but heat management efficiency may worsen due to limited space for heat dissipation components
Solution Approach 1:
The cooling apparatus components are arranged in a nested compact configuration where the evaporators, condenser, and expansion valves are positioned in close proximity and share common structural elements. This nesting approach minimizes the overall device volume while maintaining adequate heat dissipation pathways, preventing the compact design from compromising heat management 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
This design enhances the projector's installation simplicity, reduces size, and effectively cools both light sources and light modulators, maintaining optimal temperatures while ensuring efficient heat management and reduced dust accumulation on light modulators.
Implementation Method 1
the first evaporator (54) changes part of the liquid-phase operating fluid flowing from the first expander (53) to the gas-phase operating fluid by using the heat transferred from the first cooling target (CT1)
Implementation Method 2
by using the heat transferred from the first cooling target (CT1)
Implementation Method 3
the second evaporator (56) changes the liquid-phase operating fluid flowing from the second expander (55) to the gas-phase operating fluid by using the heat transferred from the second cooling target (CT2)
Implementation Method 4
a first compressor (51)... a second compressor (57)... compress the gas-phase operating fluid
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A projector includes an exterior housing forming the exterior of the projector, a first cooling target, and a cooling apparatus provided in the exterior housing and configured to cool the first cooling target. The cooling apparatus includes first to fourth tubes, a first compressor configured to compress an operating fluid in a gas phase, a condenser coupled to the first compressor via the first tube and configured to condense the gas-phase operating fluid compressed by the first compressor into the operating fluid in a liquid phase, a first expander coupled to the condenser via the second tube and configured to decompress the liquid-phase operating fluid condensed by the condenser to change to the operating fluid in which the liquid phase and the gas phase are mixed with each other, and a first evaporator coupled to the first expander via the third tube, configured to change part of the liquid-phase operating fluid supplied from the first expander to the gas-phase operating fluid by using heat transferred from the first cooling target, and configured to discharge the gas-phase operating fluid to the first compressor coupled via the fourth tube.