Accumulator Outlet Pipe Filtration for Adjustable Oil Return
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Solution Overview
Problem
Existing refrigeration system accumulators face challenges in adjusting oil-returning capacity due to fixed diameters of the oil-returning orifice and outlet pipe, leading to poor versatility and potential compressor damage from burrs.
Innovation Solution
An oil-returning device with a filtering component installed in a positioning hole of the outlet pipe, where the effective cross-sectional area is adjustable between 50% to 90% of the original, allowing for flexible oil-returning capacity by altering the depth of insertion and shape of the outlet pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the diameter of the oil-returning orifice and outlet pipe are kept fixed, then the manufacturing process is simple, but the oil-returning capacity cannot be adjusted leading to poor versatility
Solution Approach 1:
The outlet pipe is designed with a collapsible section that can dynamically change its effective cross-sectional area. By applying external force to collapse the outlet pipe wall, the effective area is reduced to create a vortex flow, enabling adjustment of oil-returning capacity without changing the physical dimensions of the orifice or pipe.
Solution Approach 2:
The invention changes the flow parameters by collapsing the outlet pipe wall to alter the effective cross-sectional area. This parameter change enables the system to achieve different oil-returning capacities while maintaining the same physical structure, thereby improving versatility without increasing device complexity.
2Reliability
If a filtering component is welded directly in the outlet pipe, then the installation is simple, but burrs may enter the compressor causing damage
Solution Approach 1:
A positioning hole is introduced as an intermediary structure between the outlet pipe and filtering component. The filtering component is installed in this positioning hole rather than being welded directly to the outlet pipe, which prevents burrs from entering the compressor while maintaining secure installation.
Solution Approach 2:
The outlet pipe structure is segmented into the main outlet pipe body and a separate positioning hole section. This segmentation allows the filtering component to be installed in the positioning hole without direct welding to the main outlet pipe, reducing the risk of burr generation and improving compressor protection.
3Adaptability or versatility
If the effective cross section area is reduced to 50%-90% of original, then the oil-returning capacity becomes adjustable, but the flow resistance increases
Solution Approach 1:
The outlet pipe effective cross-sectional area is made dynamic through collapsible design. By controlling the degree of collapse, the system can adjust the effective area to optimize the balance between oil-returning capacity and pressure difference, allowing operation within the 50%-90% range without excessive pressure buildup.
Solution Approach 2:
The invention utilizes parameter changes in the outlet pipe's effective cross-sectional area (reducing to 50%-90% of original) to achieve adjustable oil-returning capacity. This parameter adjustment is accomplished through wall collapse rather than physical obstruction, which minimizes the increase in flow resistance compared to traditional blocking methods.
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 enables adjustable oil-returning capacity, enhancing the versatility of the accumulator to meet various refrigeration system requirements while preventing compressor damage.
Implementation Method 1
when the gaseous refrigerant fluid flows through the bent arc portion of the U-shaped outlet pipe, negative pressure occurs at the oil-returning orifice of the filtering component
Implementation Method 2
there is a certain pressure difference between the inlet and outlet of the accumulator
Implementation Method 3
the liquid mixture of the liquid refrigerant and the liquid refrigerating oil sinks at the bottom of the accumulator, such that the separation of gas from liquid in the mixture is achieved
Data Source
AI summary
The present invention provides an oil-returning device and a accumulator, the oil-returning device including an outlet pipe and a filtering component, the outlet pipe having an bent arc portion which is provided with a positioning hole, the filtering component including a filtering screen and a filtering screen base with an oil-returning orifice, and being fixedly installed in the positioning hole, wherein an effective cross section area Sn of an inner space of the outlet pipe at a position where the filtering component is installed is in a range of 50%˜90% of an original effective cross section area S0 of the inner space of the untreated outlet pipe at a position where the filtering component is to be installed. The accumulator includes a hermetically sealed container, a inlet pipe and the oil-returning device, wherein in the case of a given diameter of the outlet pipe and a diameter of the oil-returning orifice, appropriate oil-returning capacity will be attained by setting the effective cross section area of the inner space at the oil-returning orifice of the outlet pipe, and thus the production has significant versatility and can meet the requirements of various refrigeration systems.