Multi-Outlet Refrigerant Dryer for Moisture Control and Flow Bias
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Solution Overview
Problem
Refrigeration systems face issues with moisture entrainment in refrigerants, which can freeze and obstruct flow, and existing dryers are not designed to minimize moisture effectively without affecting system operation during normal use.
Innovation Solution
A dryer with a housing and desiccant chamber that includes multiple outlets, where one outlet is positioned for high-pressure delivery to a first heat exchanger and another for low-pressure delivery to a second heat exchanger, promoting balanced refrigerant distribution and minimizing moisture content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dryer with multiple outlets is used to preferentially discharge refrigerant to high-pressure heat exchangers, then moisture removal effectiveness is improved, but device complexity increases
Solution Approach 1:
The dryer is segmented into multiple outlets with different discharge characteristics. The first outlet is positioned to preferentially discharge refrigerant to high-pressure heat exchangers, while a second outlet discharges to low-pressure heat exchangers. This segmentation allows the dryer to perform differentiated moisture removal functions for different system pressures, improving overall moisture removal effectiveness without requiring a completely separate dryer for each pressure zone.
Solution Approach 2:
Different regions of the dryer are designed with different discharge characteristics. The outlet positioning and internal geometry are optimized locally to create preferential flow paths toward high-pressure heat exchangers through the first outlet. This local quality differentiation enables the dryer to address moisture issues specific to high-pressure zones while maintaining overall system functionality.
2Productivity
If the dryer preferentially directs refrigerant to high-pressure heat exchangers, then system efficiency is improved, but refrigerant distribution balance becomes more difficult to control
Solution Approach 1:
The dryer utilizes the inherent pressure differences and gravitational forces in the refrigeration system to automatically direct refrigerant flow preferentially to high-pressure heat exchangers through the first outlet. No external control mechanism or additional energy input is required—the system's own operating conditions drive the preferential discharge, thereby improving system efficiency while avoiding complex control systems.
Solution Approach 2:
The outlet positioning and internal geometry exploit pneumatic and hydraulic principles to create preferential flow paths. The first outlet is positioned and dimensioned to take advantage of pressure differentials and fluid dynamics to preferentially channel refrigerant toward high-pressure heat exchangers, using the system's own pressure gradients rather than requiring active control.
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
Effectively reduces moisture in refrigerants, ensuring smooth operation by preferentially directing refrigerant flow to high-pressure and low-pressure evaporators, preventing freezing and maintaining system efficiency.
Implementation Method 1
a desiccant disposed within the drying chamber for removing at least a portion of the moisture from the refrigerant introduced into the drying chamber
Implementation Method 2
The elevation of the second outlet relative to the first outlet promotes the discharge of the refrigerant through the first outlet to be delivered to the heat exchanger with the relatively-high internal pressure
Data Source
AI summary
Provided is a dryer for minimizing moisture entrained within a refrigerant used to provide a cooling effect to a temperature-controlled environment, and a refrigeration appliance including such a dryer. The dryer includes a housing defining a drying chamber and a desiccant disposed within the drying chamber for removing at least a portion of the moisture from the refrigerant. A first outlet is formed in the housing adjacent a lower region of the drying chamber when the drying chamber is viewed in an operational orientation. A second outlet is also formed in the housing at an elevation vertically above the first outlet when the dryer is viewed in the operational orientation for discharging at least a portion of the refrigerant introduced into the drying chamber to be delivered to a second heat exchanger with a relatively-low internal pressure. The elevation of the second outlet relative to the first outlet promotes the discharge of the refrigerant through the first outlet instead of through the second outlet.