Sealed Compressor Suction Muffler with Auxiliary Hood
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Solution Overview
Problem
Conventional sealed compressors face issues with instability in the fitting state due to material expansion differences and deformation of flexible hoods under high temperature conditions, leading to inefficiencies and increased component complexity, as well as inefficient gas collection and noise mitigation.
Innovation Solution
A sealed compressor design featuring a suction muffler with a fusible resin material and an auxiliary hood made of flexible material, where the auxiliary hood extends further into the container to increase gas collection area and is fastened using a pin-shaped projection, reducing the gap between components and enhancing durability and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible hood is used to connect the suction pipe and suction inlet, then the fitting state can be maintained, but the hood deforms under high temperature conditions leading to instability
Solution Approach 1:
The hood is divided into two distinct parts: a rigid hood body made of heat-resistant material and a flexible auxiliary hood made of elastic material. This segmentation allows each part to fulfill its specific function - the rigid body maintains structural integrity under high temperature while the flexible auxiliary hood provides sealing adaptability.
Solution Approach 2:
The invention uses composite material construction where the hood body is made of heat-resistant material (such as resin) and the auxiliary hood is made of elastic material. This composite approach combines the thermal stability of the rigid material with the flexibility of the elastic material, resolving the contradiction between maintaining fitting state and resisting high temperature deformation.
2Reliability
If the hood is made of flexible material to allow elastic contact, then sealing is improved, but the material expands or deforms under high temperature
Solution Approach 1:
The hood is segmented into a heat-resistant body and a flexible auxiliary hood. The auxiliary hood specifically contacts the suction pipe opening to provide sealing, while the main body remains thermally stable.
Solution Approach 2:
Different parts of the hood have different material properties tailored to their specific functions. The auxiliary hood uses elastic material for sealing contact, while the hood body uses heat-resistant material for structural stability. This local differentiation resolves the contradiction between flexibility for sealing and rigidity for temperature resistance.
3Productivity
If the suction muffler is positioned closer to the suction pipe for better gas collection, then efficiency improves, but the risk of collision and damage increases
Solution Approach 1:
The auxiliary hood is made of elastic material that can flex and deform. This flexibility allows the hood to be positioned closer to the suction pipe for better gas collection while the elastic material absorbs collision forces, preventing damage to both the hood and the suction pipe.
4Productivity
If the hood area is increased to improve gas collection, then efficiency improves, but the complexity of securing the hood increases
Solution Approach 1:
The auxiliary hood utilizes its own elasticity to achieve both expansion for gas collection and self-securing to the suction pipe. The elastic material naturally provides the securing force needed, eliminating the need for additional complex fastening mechanisms while maintaining a large gas collection area.
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
The design achieves higher efficiency and stability by effectively collecting cooling medium gas, reducing noise, and maintaining reliability through improved gas flow and reduced component complexity.
Implementation Method 1
the auxiliary hood is made of a flexible material... utilizing its own elasticity to elastically contact the opening portion of the suction pipe
Implementation Method 2
the suction muffler is made of a resin material which is fusible... the resin material is heated by the cooling medium gas and melts
Data Source
AI summary
A sealed compressor according to the present invention comprises an electric element; a compression element; a sealed container; and a suction pipe. The compression element includes a compression chamber, a piston provided inside of the compression chamber, and a suction muffler communicating with the inside of the sealed container and the compression chamber. The suction muffler is laid out such that an opening portion thereof at the sealed container side faces an opening portion of the suction pipe at the sealed container side. The suction muffler includes: a hood section provided in the vicinity of the opening portion of the suction muffler to extend toward the inside of the sealed container, the hood section being configured to collect cooling medium gas discharged from the suction pipe; and an auxiliary hood fastened to the hood section and formed in a manner to increase a collection area of the hood section.