Reciprocating Compressor Exhaust Silencer Extraction
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Solution Overview
Problem
The existing reciprocating compressors in refrigeration appliances face efficiency losses due to heat transfer from hot exhaust refrigerant to critical components, leading to increased size and cost with existing thermal insulation solutions.
Innovation Solution
A metal coupling and exhaust tube system is introduced, where the exhaust silencer is separate from the cylinder head, with a metal bolt coupling providing a gas-tight connection through a welding joint, directing the refrigerant away from the compressor main body to a remote silencer, reducing heat transfer and maintaining efficient flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If thermal insulation plates and increased spacing are used to reduce heat transfer from exhaust refrigerant to compressor components, then heat transfer is reduced, but the compressor size increases and manufacturing costs increase
Solution Approach 1:
The exhaust silencer is extracted from the cylinder head and positioned remotely, allowing the exhaust chamber to be thermally isolated from other compressor components. This removes the heat transfer pathway without requiring additional insulation materials or increasing the compressor housing volume.
Solution Approach 2:
The exhaust passage is reconfigured to extend in a direction away from the compressor main body, utilizing spatial arrangement rather than thermal barriers. The exhaust tube and coupling create a three-dimensional pathway that directs hot refrigerant away from sensitive components without adding thermal insulation layers.
2Loss of energy
If thermal insulation plates and increased spacing are used to reduce heat transfer from exhaust refrigerant to compressor components, then heat transfer is reduced, but manufacturing costs increase
Solution Approach 1:
The exhaust silencer is extracted from the cylinder head and positioned remotely, allowing the exhaust chamber to be thermally isolated from other compressor components. This removes the heat transfer pathway without requiring additional insulation materials or increasing the compressor housing volume.
Solution Approach 2:
The design changes the thermal isolation approach from using insulating materials (thermal barriers) to using spatial separation and direct metal connections. This parameter change from material-based insulation to geometry-based isolation reduces manufacturing complexity and material costs.
3Temperature
If a separate exhaust silencer with remote positioning is used, then heat transfer to compressor components is reduced, but the device complexity increases
Solution Approach 1:
The coupling integrates multiple functions into a single component: it serves as both the connection point for the exhaust tube and the structural element that positions the exhaust silencer remotely. The metal body with through-hole design combines the mounting function and the exhaust passage function in one part, reducing the number of separate components.
Solution Approach 2:
The coupling structure serves multiple purposes: it provides thermal isolation, directs exhaust flow, positions the silencer remotely, and structurally connects the exhaust system to the cylinder head. This multi-functionality reduces the need for additional dedicated components for each function.
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 effectively reduces heat transfer from the exhaust refrigerant to critical components, enhancing compressor efficiency while minimizing size and cost increments.
Implementation Method 1
a second fixing part integrally provided with the metal body, for gas-tightly joining, an opening of the exhaust tube to the hollow part by a welding joint
Implementation Method 2
an exhaust silencer for attenuating pressure pulsation of refrigerant received from the exhaust chamber
Implementation Method 3
the temperature of the refrigerant in the exhaust chamber is considerably higher than the temperature of the refrigerant in the suction chamber due to the compression effectuated to the refrigerant by the piston. Consequently, the excess heat of the refrigerant in the exhaust passage is partly released to the other components of the compressor such as the compression chamber, the suction chamber, a motor and the like which are in the vicinity of the exhaust passage. Hence, an overall efficiency of the compressor decreases. Therefore, heat transfer from the exhaust refrigerant to the aforementioned critical components of the compressor must be reduced.
Data Source
AI summary
The present invention relates to a reciprocating hermetic compressor (1) for use in a refrigeration appliance, comprises a cylinder block (2) having a compression chamber (3), a cylinder head (4) having a suction chamber (5) and an exhaust chamber (6), each being in fluid connection with the compression chamber (3) through a valve plate (7) interposed between the cylinder block (2) and the cylinder head (4), an exhaust silencer, separately provided from the cylinder head (4), for attenuating pressure pulsation of refrigerant received from the exhaust chamber (6), a metal exhaust tube (8) for guiding the refrigerant from the exhaust chamber (6) to the exhaust silencer and a metal coupling (9) for fluidly connecting the exhaust chamber (6) with the exhaust tube (8).