Receiver Drier Filter Layout for Low-Pressure Refrigerant Flow
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Solution Overview
Problem
The filter units in receiver driers of air conditioning systems face clogging issues due to the entrapment of impurities, leading to reduced efficiency, and existing solutions struggle to maximize the effective surface area while maintaining a compact size and ensuring proper refrigerant flow direction.
Innovation Solution
A filter unit configuration where the refrigerant flows in a direction substantially perpendicular to the longitudinal axis of the receiver drier, with a filter chamber having a maximized effective surface area and a screen element design that allows for efficient debris removal without altering the system's pressure or velocity, enabling easy replacement and minimizing packaging size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the effective surface area of the screen element is increased to extend filter unit life, then the useful life of the filter unit is extended, but the size and shape of the filter unit must be carefully chosen to avoid excessive pressure or velocity changes that could alter air conditioning system operation
Solution Approach 1:
The screen element is configured with a three-dimensional structure including a first surface and a second surface, allowing refrigerant to flow through the screen element from the first surface to the second surface. This dimensional configuration increases the effective filtering surface area while distributing the pressure drop across multiple flow paths, thereby extending filter unit life without causing excessive pressure changes in the refrigerant flow.
2Duration of action of stationary object
If the effective surface area of the screen element is increased to extend filter unit life, then the useful life of the filter unit is extended, but the packaging size of the filter unit must be minimized
Solution Approach 1:
The screen element is nested within the filter unit housing in a compact arrangement where the first surface and second surface are positioned to maximize filtering area within the available space. The screen element structure is integrated into the filter unit geometry, allowing the filtering surfaces to be arranged in a space-efficient configuration that extends filter life while minimizing the overall packaging size of the filter unit.
3Reliability
If the screen element is designed to trap impurities and contaminants, then the filtering efficiency is improved, but the openings of the screen element become clogged during extended use, reducing system efficiency
Solution Approach 1:
The screen element is designed with a dual-surface configuration where refrigerant flows from the first surface through the screen element to the second surface. This continuous flow path design ensures that impurities and contaminants are consistently trapped and embedded in the screen element structure, maintaining filtering efficiency throughout extended use without causing clogging that would reduce system productivity. The configuration allows the screen element to continuously perform its filtering function while accommodating the accumulation of trapped particles.
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 extends the useful life of the filter unit by maximizing the effective surface area for debris removal while maintaining a compact size, ensuring efficient refrigerant flow and preventing clogging, thus enhancing the overall performance of the air conditioning system.
Implementation Method 1
a screen element configured to filter debris carried by the flow of the refrigerant
Implementation Method 2
remove undesired moisture from the refrigerant such as water, by using a moisture absorbent material such as a desiccant
Data Source
AI summary
A receiver drier comprises a housing and a filter unit. The housing includes a moisture absorbing chamber and a longitudinally spaced filter chamber. The filter chamber includes an inlet formed adjacent a first portion of an inner circumferential surface thereof and an outlet formed adjacent a second portion of the inner circumferential surface. The filter unit is received within the filter chamber and includes a main body defining a first filter compartment therein. A first surface of the first filter compartment is defined by a first screen element fluidly coupling an interior of the first filter compartment to an exterior thereof. The flow of the refrigerant enters and exits the first filter compartment while flowing in a direction substantially perpendicular to the longitudinal direction of the receiver drier.