Compressor Cylinder Head Insulation Chamber
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Solution Overview
Problem
Hermetic compressors in refrigerators experience efficiency and performance issues due to sound and heat generated during refrigerant flow, leading to refrigerant backflow and increased temperature in the suction chamber, which affects compressor performance.
Innovation Solution
The compressor incorporates an insulation chamber between the cylinder head and cover, made from materials with low heat and sound conductivity, along with a suction muffler and sealing elements to prevent sound and heat dispersion, and a flange system for secure attachment, minimizing heat exchange between the suction and exhaust chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the suction valve leaf covers the front of the inlet passage, then the refrigerant flow is controlled, but the refrigerant flows back towards the suction chamber by impacting the suction valve leaf generating sound
Solution Approach 1:
The harmful sound and heat generated by refrigerant backflow is extracted and isolated from the main compressor body by introducing a separate insulation chamber. This chamber captures the noise and thermal energy that would otherwise propagate through the compressor, effectively removing the harmful effects from the system while maintaining the necessary valve operation for refrigerant control.
Solution Approach 2:
The insulation chamber acts as an intermediary element between the suction chamber and the external environment. It mediates the harmful effects of refrigerant backflow by providing a buffer zone that absorbs sound waves and thermal energy, preventing direct transmission of these harmful factors to the compressor housing and surrounding components.
2Productivity
If the refrigerant is compressed and delivered to the exhaust chamber, then the compression function is achieved, but the temperature at the interior of the suction chamber increases adversely affecting compressor efficiency
Solution Approach 1:
The compressor structure is segmented into functionally isolated zones by introducing the insulation chamber. This segmentation separates the hot exhaust chamber from the cooler suction chamber, preventing thermal cross-contamination. The insulation chamber creates distinct thermal zones that allow each chamber to maintain its optimal temperature for its specific function.
Solution Approach 2:
The insulation chamber serves as a thermal intermediary that blocks heat transfer between the exhaust chamber and suction chamber. It mediates the thermal interaction by providing an insulating barrier that prevents the heat generated during compression from adversely affecting the suction chamber temperature, thus maintaining efficient compressor operation.
3Productivity
If the exhaust chamber temperature increases during refrigerant delivery, then the compression process is completed, but the heat disperses outside the suction chamber affecting performance
Solution Approach 1:
The heat energy generated during the compression process is extracted from the exhaust chamber and contained within the insulation chamber. This prevents the heat from dispersing into the suction chamber and surrounding compressor components, effectively capturing and isolating the thermal energy that would otherwise represent a loss of system efficiency.
Solution Approach 2:
The insulation chamber acts as a thermal mediator that controls heat dispersion during the compression process. It mediates the thermal energy transfer by providing an insulating barrier that directs heat containment within the exhaust chamber, preventing unwanted heat loss to other parts of the compressor system and maintaining overall energy efficiency.
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 effectively attenuates noise and heat, improving compressor efficiency by reducing refrigerant backflow and maintaining low temperatures within the chambers, thus enhancing overall performance.
Implementation Method 1
By means of the insulation chamber, the noise, generated with the mixing of the refrigerant moving towards the valve leaf and the refrigerant flowing back by impacting the valve leaf, is prevented from dispersing outside the cover and insulation is provided.
Implementation Method 2
the cover is produced from a material with low heat and/or sound conductivity. Thus, the cover disposed on the cylinder head provides heat and sound insulation.
Implementation Method 3
the refrigerant flows back by impacting the valve leaf in the case the valve leaf situated on the valve plate is closed
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
A compressor (1) comprising: a casing (2) carrying the components therein, a cylinder (3), a cylinder head (4) having at least one exhaust chamber (6) and a suction chamber (7), a valve plate (5) situated between the cylinder (3) and the cylinder head (4). At least a cover (8) is mounted on the cylinder head (4), which forms at least one insulation chamber (9) situated between the cylinder head (4) and the cover (8). Said insulation chamber (9) attenuates the noise generated by the compressor and isolates thermically the exhaust chamber (6) from the suction chamber (7).