Double-rotating scroll compressor

The double-rotary scroll compressor addresses thrust load issues by using a back pressure chamber to counteract thrust forces, eliminating the need for thrust bearings and maintaining efficiency and compactness.

JP2026090802APending Publication Date: 2026-06-03TOYOTA INDUSTRIES CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
TOYOTA INDUSTRIES CORP
Filing Date
2024-11-22
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Conventional double-rotary scroll compressors face issues with thrust loads on the drive scroll, which increase power requirements and compressor size when thrust bearings are installed to mitigate these loads.

Method used

The compressor design incorporates a back pressure chamber between the cover body and a protruding portion of the housing, utilizing the higher pressure in the discharge chamber to counteract thrust loads without the need for thrust bearings, thereby reducing thrust loads while maintaining compressor size and power efficiency.

Benefits of technology

This design effectively reduces thrust loads on the drive scroll, preventing the need for thrust bearings and minimizing increases in power and size, thus enhancing the efficiency and compactness of the compressor.

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Abstract

To provide a dual-rotation scroll compressor that can reduce the thrust load acting on the drive scroll while suppressing increases in power and size. [Solution] In the compressor of the present invention, the drive scroll 30 has a cover body 37, a supported portion 39c, and a communication passage 80. The cover body 37 is rotatably supported on a protruding portion 64. The supported portion 39c is positioned at a distance from the cover body 37 in the direction of the drive axis O1. The supported portion 39c extends toward the opposite side of the cover body 37 in the direction of the drive axis O1 and is rotatably supported on the housing 6. The communication passage 80 communicates with the discharge chamber 14. A back pressure chamber 85 is formed between the cover body 37 and the protruding portion 64. The back pressure chamber 85 communicates with the discharge chamber 14 via the communication passage 80. The back pressure chamber 85 is opposed from the other side in the direction of the drive axis O1 to the thrust load acting on the supported portion 39c from one side in the direction of the drive axis O1.
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