Pump body assembly, fluid machine and heat exchange equipment

By using a pump body assembly with a large and small cylinder structure and an eccentric crankshaft design, the problems of cylinder miniaturization and complex assembly in multi-cylinder rotary compressors have been solved, achieving cylinder miniaturization and energy efficiency improvement, reducing vibration and noise, and improving crankshaft reliability.

CN121993401APending Publication Date: 2026-05-08GREE ELECTRIC APPLIANCE INC OF ZHUHAI
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Patent Information

Application Number
CN202411585194.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-07
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing multi-cylinder rotary compressors suffer from limitations in cylinder miniaturization design, high vibration and noise, complex assembly, and low energy efficiency.

Method used

It adopts a large and small cylinder structure design, with the third cylinder having a smaller volume than the first and second cylinders and is located between two flanges. Combined with the eccentric crankshaft and roller design, it achieves cylinder miniaturization and independent compression. The muffler is located outside the first cylinder, optimizing the exhaust structure.

Benefits of technology

This design enables miniaturized cylinder design, reduces power consumption of friction pairs, improves energy efficiency, reduces vibration and noise, simplifies assembly, and enhances crankshaft reliability.

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Abstract

The invention provides a pump body assembly, a fluid machine and heat exchange equipment. The pump body assembly comprises a first air cylinder and a second air cylinder, and a partition plate is arranged between the first air cylinder and the second air cylinder. The volume of the third air cylinder is smaller than that of the first air cylinder and that of the second air cylinder. The first air cylinder and the second air cylinder are located between the first flange and the second flange; the third air cylinder is located between the second flange and the first cover plate; and the second cover plate is located between the second flange and the third air cylinder, and a first exhaust cavity of the second air cylinder is formed between the second cover plate and the second flange. The problem that in the prior art, miniaturization design of an air cylinder in fluid machinery is limited is solved.
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