Pump body assembly with a piston sleeve having protrusions for limiting radial movement between the piston sleeve and the structural members

US11639719B2 · kind B2 · utility

Assignee

• GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI · CN

Inventors

• Yusheng Hu · Beijing, CN
• Huijun Wei · Longbeilingcun, CN
• Jia Xu · Zhuhai, CN
• Zhongcheng Du · Zhuhai, CN
• Sen Yang · Zhuhai, CN
• Zhi Li · 红钢城街道, CN
• Liping Ren · Tangxia, CN
• Shebing Liang · Zhuhai, CN
• Rongting Zhang · Zhuhai, CN
• Zhengliang Shi · Zhuhai, CN
• Xixing Liu · Zhuhai, CN
• Pengkai Wan · Tangxia, CN

Key dates

• Filing date: Dec 13, 2018
• Grant date: May 2, 2023
• Expiry date: Apr 15, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2240/80
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A pump body assembly, fluid machinery, and a heat exchange device. The pump body assembly includes: at least two structure members; a cylinder disposed between the two structure members; and a piston assembly disposed in the cylinder. The piston assembly includes a piston sleeve and a piston slidably disposed in the piston sleeve; an upper end surface of the piston sleeve fits and is limited by a lower end surface of one structure member disposed above the piston sleeve, to prevent the piston sleeve from displacing along a radial direction relative to the one structure member, and effectively solving a problem in prior art that working efficiency of the pump body assembly is affected because the piston sleeve of the pump body assembly is prone to eccentrically rotate.