Compressor Piston Suction Port Layout for Small-Diameter Efficiency
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Solution Overview
Problem
Conventional compressors face reduced compression efficiency due to miniaturization, which leads to decreased suction port cross-sectional area and increased stiffness of suction valves, resulting in poor response characteristics and leakage issues.
Innovation Solution
A piston design with a cylindrical slider and a head having a suction port between the inner and outer bodies, featuring bridges and a suction valve that increases the effective cross-sectional area and improves durability, while reducing flow path resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the piston diameter is reduced to achieve miniaturization, then the size of the compressor is reduced, but the cross-sectional area of the suction port decreases and the stiffness of the suction valve increases, resulting in poor response characteristics
Solution Approach 1:
The suction port is reconfigured from a conventional radial configuration to an axial configuration that extends along the axial direction of the piston. This dimensional change allows the suction port to maintain a larger effective cross-sectional area even when the piston diameter is reduced, thereby improving suction valve response characteristics while preserving miniaturization benefits
Solution Approach 2:
The invention changes the geometric parameters of the suction port by extending it in the axial direction and configuring it between the inner and outer bodies. This parameter change increases the effective cross-sectional area of the suction port, which compensates for the reduced piston diameter and maintains adequate suction flow capacity
2Volume of moving object
If the piston diameter is reduced to achieve miniaturization, then the compressor size is reduced, but the cross-sectional area of the suction port decreases, resulting in reduced discharge flow rate
Solution Approach 1:
The suction port is reconfigured from a radial configuration to an axial configuration that extends along the axial direction of the piston. This dimensional change allows the suction port to maintain a larger effective cross-sectional area even when the piston diameter is reduced, thereby maintaining discharge flow rate while achieving miniaturization
Solution Approach 2:
The head is divided into inner and outer bodies that are spaced apart axially, creating an axial suction port between them. This segmentation allows the suction port to be positioned and dimensioned independently from the piston diameter, enabling maintained flow capacity in a miniaturized compressor
3Strength
If the length of the opening part of the suction valve is shortened, then the stiffness of the suction valve increases, but the response characteristics of the suction valve deteriorate
Solution Approach 1:
The invention changes the geometric parameters of the suction port to increase its effective cross-sectional area. This parameter change compensates for the increased stiffness caused by the shortened opening part, allowing the suction valve to maintain adequate response characteristics while having increased stiffness for better sealing
Data Source
AI summary
A piston for a compressor and a compressor including the same are disclosed. The piston is used in a compressor which compresses and discharges refrigerant suctioned into a cylinder. The piston includes a cylindrical slider and a head. The slider has an outer diameter corresponding to an inner diameter of the cylinder and defines a suction space in which the refrigerant suctioned in the cylinder is received. The head is coupled to the slider, in which a compression space is provided in the front and a suction space is provided in the rear, and in which a suction port communicating with the suction space and the compression space is formed, in which the head includes an inner body and an outer body surrounding the inner body, and the suction port is formed between the inner body and the outer body.