Integrated Suction Damping Case for Quiet Compressor Assembly
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Solution Overview
Problem
The existing suction check valves in swash plate type compressors generate noise and are heavy due to multiple components, and their assembly is complicated by restricted pressing depth, leading to degraded assemblability.
Innovation Solution
A suction damping case with a body having a first section for refrigerant introduction and a second section with an end wall for pressure reduction, integrated hooks for axial stability, embossing for rotational prevention, and windows for controlled refrigerant discharge, replacing the traditional check valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional suction check valve with multiple components (casing, base, core, spring) is used, then the damping function is provided, but the weight increases and noise is generated due to component contacts
Solution Approach 1:
The patent merges the damping function and check valve function into a single integrated suction damping case structure. The case includes a damping chamber with refrigerant and a check valve mechanism built within the same component, eliminating the need for separate damping components and reducing overall weight while maintaining both functions
Solution Approach 2:
The suction damping case serves multiple functions simultaneously: it acts as a check valve to prevent refrigerant backflow, provides damping through refrigerant oscillation in the damping chamber, and reduces noise by minimizing component contacts. This multi-functional design replaces traditional separate components with a single integrated structure
2Reliability
If a suction check valve with four separate components is used, then the damping function is achieved, but the device complexity increases
Solution Approach 1:
The patent combines the damping chamber, check valve mechanism, and housing into a single integrated suction damping case. The check valve core, spring, and damping refrigerant are contained within one component structure, reducing the number of separate parts from four to one and simplifying the overall device complexity
3Stability of the object's composition
If the suction check valve is assembled by forced press-fitting, then the valve is fixed in position, but the assemblability is degraded due to restricted pressing depth
Solution Approach 1:
The patent introduces protrusions on the suction damping case that engage with corresponding grooves in the rear housing, creating a positioning mechanism in the radial dimension. This allows the valve to be securely fixed without requiring deep axial pressing, improving assemblability while maintaining positioning stability
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 suction damping case reduces weight, prevents axial and rotational movement due to refrigerant pulsation, enhances assembly productivity, and minimizes noise during refrigerant suction.
Implementation Method 1
a second section S2 in which since the other end is blocked by an end wall 302, the refrigerant moves in an axial direction and then comes into contact with the end wall 302, so that the refrigerant flows for a predetermined period of time at reduced pressure and speed
Implementation Method 2
an embossing 350 protruding from an outer circumferential surface of the body 310 lest the body 310 should be rotated by vibration after the body 310 is installed in the rear housing 100
Data Source
AI summary
Disclosed is a suction damping case. A refrigerant introduced into the suction damping case flows for a predetermined period of time at reduced pressure and speed, and then is discharged to the outside of the body, so that a damping function can be made. When the suction damping case is coupled to a rear housing, a hook and an embossing prevents the suction damping case from being separated.