Swash Plate Compressor Variable Reed Orifice
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Solution Overview
Problem
Conventional swash plate compressors experience efficiency reduction due to unnecessary loss of refrigerant gas through the orifice hole, even when the difference between control pressure and suction pressure is kept constant.
Innovation Solution
Incorporation of a variable reed mechanism with a buffer space and a system of orifice holes to control the flow rate of refrigerant, allowing the reed to open and close, and varying the passage to minimize refrigerant outflow by introducing refrigerant through a hollow passage and a through-portion into the suction chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If refrigerant is discharged through the orifice hole to maintain proper pressure in the control chamber, then the pressure balance is maintained, but refrigerant gas is lost and compressor efficiency is reduced
Solution Approach 1:
The patent applies a variable reed mechanism that dynamically opens and closes based on pressure differences. The reed valve transitions from a closed state (when control pressure equals suction pressure) to an open state (when control pressure exceeds suction pressure), allowing the system to adapt its refrigerant discharge characteristics in real-time based on operating conditions.
Solution Approach 2:
The patent changes the flow resistance parameter of the orifice hole by introducing a variable reed mechanism. When the reed is closed, the effective flow area is minimized; when opened, the flow area increases. This dynamic parameter change allows the system to maintain proper pressure balance while minimizing unnecessary refrigerant discharge.
2Stability of the object's composition
If the orifice hole is used to reintroduce refrigerant from the control chamber to the suction chamber, then pressure balance is maintained, but compressor efficiency decreases due to unnecessary refrigerant discharge
Solution Approach 1:
The variable reed mechanism provides dynamic control over the orifice hole's effective opening size. The reed valve responds to pressure differences between the control chamber and suction chamber, opening only when necessary to maintain pressure balance, thereby minimizing unnecessary refrigerant discharge and maximizing compressor efficiency during normal operation.
Solution Approach 2:
The variable reed mechanism operates autonomously based on pressure differential conditions. When control pressure equals or exceeds suction pressure, the reed closes automatically to prevent refrigerant loss. When control pressure drops below suction pressure, the reed opens to allow refrigerant reintroduction, maintaining pressure balance without external control systems.
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 configuration reduces refrigerant gas loss, thereby enhancing the compressor's efficiency by controlling the flow rate and maintaining constant pressure differences.
Implementation Method 1
the variable reed may be displaced into the reed groove as described above. In addition, the first orifice hole may be disposed to cover at least a portion of an outer peripheral portion of the variable reed
Implementation Method 2
the variable reed may be configured such that one end thereof is formed integrally with the suction plate and the other end thereof extends as a free end, and the variable reed may be displaced into the reed groove
Data Source
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AI summary
Disclosed herein is a swash plate compressor including a cylinder block accommodating a piston for compressing a refrigerant, a front housing coupled to the front of the cylinder block and having a crank chamber, a rear housing having a suction chamber and a discharge chamber and coupled to the rear of the cylinder block. The swash plate compressor includes a valve assembly including a valve plate inserted into the rear housing, a gasket inserted into the cylinder block, and a suction plate inserted between the valve plate and the cylinder block, and a variable orifice module including a first orifice hole through which the refrigerant in the crank chamber passes, a second orifice hole communicating with the suction chamber to discharge the refrigerant passing through the first orifice hole to the suction chamber, and an intermediate passage interconnecting the first and second orifice holes, the first orifice hole having a variable reed, a degree of opening of which is varied depending on the pressure of the refrigerant.