Compressor Reed Valve Seat Structure for Impact-Resistant Sealing
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Solution Overview
Problem
In existing compressors, the reed valve or valve seat can be damaged due to impacts when the reed valve is located on the valve seat, leading to potential damage and reduced reliability.
Innovation Solution
A compressor design where the valve seat is made of material with a lower longitudinal elastic modulus than the compressing mechanism, and the contact length between the reed valve and valve seat is optimized to reduce impact and oil film breakage resistance, with the valve seat protruding in the direction of separation from the fixed scroll to minimize direct contact and stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reed valve is made to contact the valve seat for sealing, then sealing performance is improved, but impact damage occurs to the reed valve or valve seat
Solution Approach 1:
The patent applies beforehand cushioning by introducing an elastic body between the reed valve and valve seat. This elastic body deforms elastically upon contact, absorbing impact energy before it reaches the reed valve or valve seat. The elastic body is positioned to contact the reed valve when the reed valve contacts the valve seat, providing cushioning protection in advance of potential damage
Solution Approach 2:
The patent uses an elastic body as an intermediary element between the reed valve and valve seat. This intermediary component mediates the contact interaction, allowing the reed valve to seal against the valve seat while the elastic body absorbs the mechanical impact. The elastic body translates the direct impact force into elastic deformation, protecting the critical sealing components
2Strength
If the valve seat is made rigid for structural strength, then structural integrity is improved, but impact force increases on the reed valve
Solution Approach 1:
The elastic body serves as an intermediary that decouples the rigid valve seat from the reed valve contact. The valve seat maintains its rigid structural integrity for strength, while the elastic body intercepts the impact force and transforms it into elastic deformation, preventing the full impact force from transmitting to the reed valve
Solution Approach 2:
The patent changes the mechanical parameter of the contact interface by introducing an elastic material with appropriate elastic modulus. This parameter change allows the system to maintain rigid structural support while modifying the contact characteristics to reduce impact forces through elastic deformation
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 design reduces the likelihood of damage to the reed valve and valve seat, improves sealing, and enhances the compressor's reliability and efficiency by minimizing over-compression losses and pressure loss during valve opening.
Implementation Method 1
a contact portion of the elastic body that contacts the reed valve when the reed valve contacts the valve seat; the elastic body is made of material having a longitudinal elastic modulus lower than a longitudinal elastic modulus of the compressing mechanism
Data Source
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AI summary
A compressor includes: a shell; a compressing mechanism provided in the shell, and having a compression chamber where refrigerant is compressed and a discharge port from which the refrigerant compressed in the compression chamber is discharged; and a discharge-valve mechanism provided in a discharge chamber provided between the shell and the compressing mechanism. The discharge-valve mechanism opens and closes the discharge port. The discharge-valve mechanism includes: a valve seat attached to the compressing mechanism and having a valve-seat hole communicating with the discharge port; and a reed valve having a fixed end attached to the compressing mechanism and a distal end as a free end. The reed valve closes the valve seat when the reed valve is located on the valve seat. The valve seat is formed of material having a longitudinal elastic modulus lower than a longitudinal elastic modulus of the compressing mechanism.