Cooling system
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Solution Overview
Problem
Conventional cooling systems with stacked type heat exchangers face challenges in achieving high heat exchange efficiency due to the difficulty in evenly introducing a vapor-liquid mixed phase refrigerant, leading to potential degradation in performance and size constraints for miniaturization.
Innovation Solution
Incorporating a microscopic bubble formation unit within the pressure reducing device, which converts the vapor phase of the refrigerant into microscopic bubbles dispersed into the liquid phase, allowing for improved heat exchange performance and reduced system size by eliminating the need for a separate separator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separator is provided to separate vapor-liquid mixed phase refrigerant into liquid phase and vapor phase before the heat exchanger, then heat exchange performance is improved, but system size increases
Solution Approach 1:
The invention segments the vapor-liquid mixed phase flow into microscopic bubbles through multiple through-hole portions in the opening member. Each through-hole portion creates fine bubbles that disperse uniformly in the liquid phase, achieving effective separation without a large separator container. This segmentation approach maintains high heat exchange performance while minimizing system size.
Solution Approach 2:
The invention changes the physical parameters of the bubble size by using through-holes with specific diameter ratios (0.01 to 0.1 times the flow path width) to generate microscopic bubbles. This parameter change in bubble size allows the vapor phase to be dispersed as fine bubbles in the liquid phase, eliminating the need for large-scale separation while improving heat exchange efficiency.
2Volume of stationary object
If vapor-liquid mixed phase refrigerant is directly introduced into the heat exchanger, then system size is reduced, but heat exchange performance degrades due to uneven refrigerant distribution
Solution Approach 1:
The opening member with multiple through-hole portions segments the incoming vapor-liquid mixed phase refrigerant into fine bubbles before it enters the heat exchanger. This segmentation ensures uniform distribution of refrigerant across all flow paths in the heat exchanger, preventing the uneven distribution that would otherwise degrade performance while keeping the system compact.
Solution Approach 2:
The opening member acts as an intermediary device between the pressure reducing valve and the heat exchanger. It mediates the vapor-liquid mixed phase flow by creating microscopic bubbles that facilitate even distribution, thereby improving heat exchange performance without requiring a large separator.
3Reliability
If the through hole portions have small cross-sectional area to create microscopic bubbles, then bubble dispersion and heat exchange performance are improved, but pressure loss increases
Solution Approach 1:
The invention uses multiple through-hole portions with small cross-sectional areas to segment the refrigerant flow into microscopic bubbles. The multiplication of small holes distributes the pressure loss across many parallel paths, achieving effective bubble dispersion for improved heat exchange while managing overall pressure loss through the collective effect of multiple small openings.
Solution Approach 2:
The invention employs a plurality of through-hole portions rather than a single large opening, using partial action across multiple small holes to achieve the desired bubble formation. This approach creates sufficient microscopic bubbles for excellent heat exchange performance while the distributed nature of multiple small holes reduces the cumulative pressure loss compared to fewer larger openings.
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 enhances heat exchange efficiency and enables a more compact cooling system design by ensuring even refrigerant distribution and preventing bubble growth, maintaining high performance without the need for a separate separator.
Implementation Method 1
a pressure reducing device configured to reduce a pressure of the refrigerant which has been partially liquefied by a condenser
Implementation Method 2
a microscopic bubble formation unit configured to form the vapor phase of the refrigerant which has become a flow of a vapor-liquid mixed phase into microscopic bubbles
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The pressure reducing device (4) for a cooling system according to the present invention is equipped with: a pressure reducing valve (5) that is disposed in a stage subsequent to a condenser for a refrigerant (40); and a microscopic bubble formation unit (20) that is disposed within the flow path for the refrigerant from the condenser to a heat exchanger so as to form the vapor phase (41) of the refrigerant (40) into microscopic bubbles (41a) and disperse the microscopic bubbles into the liquid phase (42) of the refrigerant.