Integrated Scroll Compressor Housing and Fixed Scroll

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Solution Overview

Problem

Existing scroll compressors have complex structures with multiple components, leading to increased size, weight, assembly time, and cost due to the need for multiple fastening points and components.

Innovation Solution

The scroll compressor integrates a fixed scroll with the rear housing via a rib part, reducing the number of components by eliminating the need for separate fastening bolts and using seal members or welding to create a hermetically sealed discharge cavity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple components (front housing, rear housing, fixed scroll, orbiting scroll) are used with bolt fastening, then the structure is reliable and assembly is possible, but the number of components increases and the structure becomes complicated

Engineering Contradiction:
Improvestructural reliabilityVSAvoidnumber of components
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the fixed scroll and rear housing into a single integrated component. The fixed scroll is formed as one piece with the rear housing, eliminating the need for separate bolt fastening between these two components. This integration reduces the total number of components while maintaining structural reliability through the unified design that inherently ensures proper positioning and sealing.

Inventive Principle:
Principle #5Merging (Combining)

2Reliability

If multiple components are bolt-fastened on multiple cross-sections, then the assembly is secure, but the assembly time and manufacturing cost increase

Engineering Contradiction:
Improveassembly securityVSAvoidassembly time
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

By integrating the fixed scroll and rear housing into a single component, the patent eliminates multiple bolt fastening operations that would otherwise be required at different cross-sections. This integration directly reduces assembly time and manufacturing complexity while maintaining secure assembly through the inherent structural design of the unified component.

Inventive Principle:
Principle #5Merging (Combining)

3Stability of the object's composition

If four components are used and bolt-fastened on two cross-sections, then the structure is stable, but the size and weight of the compressor increase

Engineering Contradiction:
Improvestructural stabilityVSAvoidcompressor weight
Core Design Contradiction:
Stability of the object's compositionVSWeight of stationary object

Solution Approach 1:

The patent combines the fixed scroll and rear housing into a single integrated component, reducing the total component count from four to three. This integration eliminates the weight of separate bolts, washers, and associated fastening hardware, thereby reducing the overall compressor weight while maintaining structural stability through the unified design that ensures proper alignment and sealing.

Inventive Principle:
Principle #5Merging (Combining)

4Reliability

If multiple fastening bolts are used, then the connections are secure, but the cost and manufacturing complexity increase

Engineering Contradiction:
Improveconnection securityVSAvoidmanufacturing complexity
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The patent integrates the fixed scroll and rear housing into a single molded component, eliminating the need for multiple bolts and fastening operations. This integration simplifies manufacturing by reducing the number of parts to be produced, assembled, and sealed, while connection security is maintained through the inherent structural integrity of the integrated design that ensures proper positioning and sealing without requiring additional fasteners.

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentUS10107290B2Scroll compressor including a discharge port for discharging high-pressure gas provided around the periphery of a rib in the discharge cavity
Publication Date: 2018.10.23 MITSUBISHI HEAVY IND THERMAL SYST
  • US10107290B2 patent drawing
  • US10107290B2 patent drawing
  • US10107290B2 patent drawing

AI summary

This scroll compressor is a scroll compressor provided with a housing and a scroll compression mechanism provided inside the housing, the interior of the housing being provided with an discharge cavity for discharge high-pressure gas compressed by the scroll compression mechanism, wherein: the housing is configured from a front housing and a rear housing for closing the rear-end opening of the front housing; a fixed scroll is integrally molded on the rear housing with a rib part interposed therebetween; the discharge cavity, into which an discharge port for discharging high-pressure gas opens, is provided around the periphery of the rib part; and an discharge valve for opening and closing the discharge port is installed in the discharge cavity.