Compressor Suction Valve Assembly for Reverse Oil Flow Blocking
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Solution Overview
Problem
Conventional compressor designs face challenges in preventing reverse flow of refrigerant and oil from the compression chamber to the accumulator, leading to oil deficiency and maintenance issues due to the high-pressure state of the compression chamber and low-pressure state of the accumulator, as well as potential coil spring malfunctions.
Innovation Solution
A suction valve assembly with a lifting/lowering valve and a body structure that includes a horizontal and vertical pipe configuration, where the lifting/lowering valve is guided by a protruding pipe and moves upward by pressure difference to close the flow path when the compressor stops, preventing reverse flow of oil and refrigerant, and is designed for easy maintenance and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional reverse flow prevention valves are installed on the refrigerant discharge side of the suction pipe, in the inner space of the suction pipe, or in the accumulator, then reverse flow prevention is achieved, but installation and maintenance become difficult
Solution Approach 1:
The invention merges the suction valve assembly with the fixed scroll structure, where the suction valve is directly installed in the suction hole of the fixed scroll. This integration allows the suction valve to be installed and maintained together with the fixed scroll as a single unit, significantly improving ease of repair and installation compared to separate valve installations in the suction pipe or accumulator.
2Ease of operation
If a valve using coil spring restoring force is used, then valve operation is achieved, but malfunction or damage may occur due to coil spring torsion
Solution Approach 1:
The invention replaces the coil spring-based mechanical restoring force system with a weight-based gravitational restoring force system. The suction valve is equipped with a weight that provides restoring force through gravity, eliminating the coil spring and its associated torsion problems. This substitution improves valve durability while maintaining reliable valve operation.
3Reliability
If the suction valve is designed to be guided by a protruding pipe and move upward by pressure difference, then reverse flow prevention is improved, but device complexity increases
Solution Approach 1:
The protruding pipe structure serves multiple functions: it guides the suction valve movement, provides structural support, and creates the pressure difference mechanism that drives valve operation. By making the guide structure multi-functional, the invention achieves reliable reverse flow prevention without significantly increasing overall device complexity.
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 prevents reverse flow of oil and refrigerant, maintains lubrication by storing oil for reuse, and reduces maintenance complexity by eliminating the need for coil springs, ensuring efficient compressor operation and longevity.
Implementation Method 1
the lifting/lowering valve moves upward by pressure difference to close the flow path when the compressor stops, preventing reverse flow of oil and refrigerant
Data Source
AI summary
A suction valve assembly for a compressor and a compressor having a suction valve assembly. The suction valve assembly may include a body that connects a compression chamber of the compressor with an accumulator, and a lifting/lowering valve provided in the body. The lifting/lowering valve may be moved upward by a pressure difference between an inner space of the accumulator and an inner space of the compression chamber when operation of the compressor stops and block reverse flow of oil to the accumulator. Accordingly, when operation of the compressor stops, compressed oil may be prevented from reversely flowing to the accumulator.