Hermetic Compressor Oil Deflection for Cooler Suction Ducts
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Solution Overview
Problem
In refrigerant compressors, the heated oil settling on the compressor housing wall can inadvertently heat the refrigerant in the suction duct, leading to increased intake temperature and reduced efficiency, and also heats the pressure duct, causing unnecessary heating of the compressor housing.
Innovation Solution
The implementation of deflection means, such as guide extensions or recesses, above the suction and pressure ducts within the compressor housing prevents contact between the downwardly flowing oil and these ducts, thereby blocking heat exchange and maintaining refrigerant temperature before compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If oil is allowed to flow down the compressor housing wall for cooling, then cooling of the piston-cylinder unit is improved, but heat exchange with the suction duct and pressure duct causes unwanted heating of the refrigerant
Solution Approach 1:
The patent introduces a baffle plate as an intermediary element positioned between the oil flow path on the compressor housing wall and the suction duct. This baffle plate intercepts the oil before it can contact the suction duct, preventing heat transfer to the refrigerant while allowing the oil to continue cooling the piston-cylinder unit. The baffle plate thus mediates between the cooling requirement and the temperature control requirement.
Solution Approach 2:
The patent extracts or separates the oil flow path from the suction duct area by using the baffle plate to redirect the oil flow. The oil is taken out of the direct path toward the suction duct and redirected along the compressor housing wall away from the duct, preventing unwanted heat exchange while maintaining the cooling function.
2Loss of energy
If the pressure duct is positioned to allow oil flow contact, then heat dissipation from compressed refrigerant is improved, but the heated oil circulates back and heats the compressor housing and suction duct
Solution Approach 1:
The baffle plate serves as an intermediary that separates the hot pressure duct from the oil flow path. It allows the pressure duct to remain in position for effective heat dissipation while preventing the oil from contacting the hot duct surface, thus blocking the heat transfer path that would otherwise raise the compressor housing temperature.
Solution Approach 2:
The baffle plate extracts or removes the oil flow from the area near the hot pressure duct, preventing the oil from absorbing heat from the compressed refrigerant. This separation maintains the heat dissipation function of the pressure duct while eliminating the harmful feedback heating of the compressor housing.
3Device complexity
If no deflection means are provided, then the device complexity is reduced, but heat exchange between oil and ducts reduces compressor efficiency
Solution Approach 1:
The patent segments the compressor housing interior by introducing a baffle plate that divides the space into regions with controlled oil flow paths. This segmentation prevents direct contact between oil and ducts without requiring complete redesign of the compressor architecture, adding minimal complexity while significantly improving efficiency.
Solution Approach 2:
The baffle plate is positioned locally at the critical area where oil flow would otherwise contact the suction duct. This localized intervention provides the necessary heat exchange prevention only where needed, rather than requiring global changes to the entire compressor system, thus minimizing added complexity.
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 solution effectively prevents the heating of refrigerant in the suction duct and oil in the pressure duct, enhancing the efficiency of the refrigerant compressor by maintaining lower intake temperatures and reducing the technical work required for compression.
Implementation Method 1
the downwardly flowing oil and the like is deflected from the suction duct (2) or pressure duct (3) by means of deflection means (5, 6)
Implementation Method 2
the heat absorbed from the oil is passed on to the compressor housing and is further dissipated to the ambient environment
Implementation Method 3
the heat absorbed from the oil is passed on to the compressor housing and is further dissipated to the ambient environment
Implementation Method 4
a piston oscillating in a cylinder via a crankshaft to compress the refrigerant
Implementation Method 5
which has the task of absorbing or reducing the noise caused by the refrigerant circulation and the piston and valve movements
Data Source
AI summary
A hermetically encapsulated refrigerant compressor has a hermetically sealed compressor housing, in the interior of which operates a refrigerant-compressing piston-cylinder unit, a suction duct, via which refrigerant is conveyed into the compressor housing, and a pressure duct, via which refrigerant is conveyed out of the compressor housing by the piston-cylinder unit. In order to prevent contact of oil flowing down the compressor housing wall with the suction duct or the pressure duct, a deflection element is on the compressor housing, and in the operating position of the compressor housing the deflection element is above the passage of the suction duct or pressure duct through the compressor housing wall. The heating of the refrigerant is thus prevented and the efficiency of the refrigerant compressor is increased.