refrigerator

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Solution Overview

Problem

The disassembly and assembly steps of the evacuator in existing refrigerators are complicated, making it difficult to perform rapid testing of the compressor.

Innovation Solution

A refrigerator design that includes a housing with specific accommodating cavities and a disassembly and assembly hole, allowing for the independent testing of the compressor without disassembling the compression devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the evacuator is directly installed in the housing with the piston coaxially arranged with the compressor piston, then the vibration of the refrigerator is reduced, but the disassembly and assembly steps become complicated

Engineering Contradiction:

ImprovevibrationVSAvoiddisassembly and assembly steps

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The housing is divided into multiple accommodating cavities (first, second, and at least two third accommodating cavities) that are communicated with each other. The discharge device can be independently accessed through the disassembly and assembly hole located between the third accommodating cavities, allowing segmentation of maintenance operations without affecting the entire system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The disassembly and assembly hole serves as an intermediary access point that enables independent removal and installation of the discharge device. This intermediary structure allows technicians to perform maintenance on the discharge device without disassembling the compression devices or other critical components.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Volume of moving object

If the discharge device is integrated with the compression devices in the same cavity, then the structure is compact, but the testing of the compressor cannot be performed rapidly

Engineering Contradiction:

Improvestructure compactnessVSAvoidtesting speed

Core Design Contradiction:

Volume of moving objectVSProductivity

Solution Approach 1:

The housing is segmented into multiple accommodating cavities that are communicated with each other, allowing the discharge device to be independently accessed and removed through the disassembly and assembly hole. This segmentation enables rapid testing of the compressor by isolating the discharge device without disassembling the entire system.

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If the disassembly and assembly hole is provided between the third accommodating cavities, then the discharge device can be independently accessed, but the housing structure becomes more complex

Engineering Contradiction:

Improvedischarge device accessibilityVSAvoidhousing structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The disassembly and assembly hole serves multiple functions: it provides access to the discharge device for maintenance, enables rapid testing of the compressor, and maintains the structural integrity of the housing. The communicated accommodating cavities serve both structural and functional purposes, allowing gas flow while providing independent access points.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Simplifies the disassembly and assembly steps of the discharge device, enabling rapid testing of the compression device while maintaining the refrigeration efficiency by canceling out piston vibrations and reducing gas flow distance.

Implementation Method 1

a first compression cavity and a second compression cavity, which are communicated with each other through the discharge device

Methodology Applied

Scientific EffectGas compression: Compression

Implementation Method 2

the Stirling refrigerator utilizes the reciprocating motion of the piston to form periodic pressure fluctuations

Methodology Applied

Scientific EffectPressure fluctuation: Pressure Gradient

Implementation Method 3

utilizes an evacuator that operates at low temperatures to adjust the sound field distribution of the refrigerator, so as to produce a cooling effect in the regenerative structure

Methodology Applied

Scientific EffectSound field distribution: Acoustic Radiation Pressure

Data Source

PatentUS20250043997A1refrigerator

Publication Date: 2025.02.06 LIHAN CRYOGENICS

AI summary

A refrigerator includes a housing, a discharge device, a cold finger device, and at least two compression devices. A disassembly and assembly hole is provided on the housing located between the at least two third accommodating cavities arranged at intervals, and the disassembly and assembly hole is communicated with the first accommodating cavity and is configured for the disassembly and assembly of the discharge device. By arranging the disassembly and assembly hole, the disassembly and assembly steps of the discharge device are simplified, meeting the need of rapid testing of the compression device. By arranging the discharge device with a stepped piston, the service life of the discharge device is increased and the discharge device has higher reliability and consistency. By arranging a tree topology or net topology, the flow resistance of gas may be reduced and the refrigeration efficiency may be improved, achieving multi-stage refrigeration.