Projector Cooling Pump Chamber for Stable Fluid Pressure

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Solution Overview

Problem

Conventional liquid cooling systems for projectors face challenges in maintaining stable pressure circulation, leading to negative pressure and reduced pumping efficiency due to deformation of the circulation flow passage, which affects the ability to cool heat-producing devices effectively.

Innovation Solution

The implementation of a cooling device with a pump chamber and volume adjusting chambers that adjust pressure and fluid flow, ensuring equal pressure at the inlet and outlet flow passages, thereby stabilizing fluid circulation and preventing deformation-induced negative pressure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a sealed-system circulation flow passage is used to prevent leakage, then reliability is improved, but the flow passage expands due to pressure changes causing negative pressure and pump instability

Engineering Contradiction:

Improveleakage preventionVSAvoidpressure stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The sealed circulation flow passage is divided into multiple independent sealed sections. Each section can expand or contract independently due to pressure changes, preventing cumulative expansion that would cause negative pressure. The segmentation allows the system to maintain overall sealing reliability while accommodating local volume changes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system changes the physical parameters of the flow passage by using flexible materials with specific elastic moduli and thermal expansion coefficients. This allows the flow passage to dynamically adjust its volume in response to pressure and temperature changes, maintaining positive pressure throughout operation while preserving the sealed configuration.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the pump operates continuously to circulate cooling fluid, then cooling efficiency is improved, but the flow passage expansion causes negative pressure and pump deterioration

Engineering Contradiction:

Improvecooling efficiencyVSAvoidpump stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system incorporates pre-designed expansion compensation mechanisms in the flow passage before pump operation begins. These mechanisms, such as bellows or expandable sections, are prepared to absorb volume changes that will occur during continuous pump operation, preventing negative pressure development and protecting the pump from instability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The system implements pressure sensors and control mechanisms that monitor the circulation pressure in real-time. When pressure approaches negative values due to flow passage expansion, the system automatically adjusts pump speed or activates compensation mechanisms, creating a feedback loop that maintains pump stability during continuous operation.

Inventive Principle:

Principle #23Feedback

3Productivity

If the volume of cooling fluid is increased to improve heat dissipation, then cooling performance is improved, but the flow passage expansion causes fluid insufficiency and negative pressure

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidfluid volume

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The system employs a nested structure where an expandable flow passage is contained within a larger reservoir or expansion chamber. This allows the system to accommodate increased fluid volume requirements for improved heat dissipation while the outer structure provides boundary containment, preventing negative pressure even as the inner passage expands to hold more cooling fluid.

Inventive Principle:

Principle #7Nested doll (Nesting)

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 solution allows for stable fluid circulation and efficient heat dissipation, extending the lifespan of solid-state light emitting sources by maintaining consistent pressure and preventing damage from excessive heat.

Implementation Method 1

a pump chamber 48a of which a volume can be changed by driving a piston or a movable wall

Methodology Applied

Scientific EffectPressure change: Pressure Increase

Implementation Method 2

a cooling medium 17 that is used for cooling a heat producing body 10H... absorbs the heat produced by the heat producing source

Methodology Applied

Scientific EffectHeat absorption: Absorption (physical)

Implementation Method 3

the heat of the heated cooling liquid can be radiated to the outside with high efficiency using the cooling mechanism

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Data Source

PatentUS9057367B2Cooling device and projector

Publication Date: 2015.06.16 SEIKO EPSON CORP

AI summary

A cooling device is provided. The cooling device may include a pump chamber, an inlet flow passage that is used for allowing a fluid to flow into the pump chamber, an outlet flow passage that allows the fluid to flow out from the pump chamber, a pump that includes a fluid resistance element that opens or closes the inlet flow passage between the inlet flow passage and the pump chamber, a circulation flow passage that is used for circulating the fluid from the outlet flow passage to the inlet flow passage, and a first volume adjusting chamber that adjusts pressure of the fluid flowing into the pump chamber.