Pump body assembly, fluid machinery, and heat exchange device

US11208990B2 · kind B2 · utility

Assignee

• GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI · CN

Inventors

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

Key dates

• Filing date: Dec 13, 2018
• Grant date: Dec 28, 2021
• Expiry date: Dec 13, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2230/603
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A pump assembly, fluid machinery, and a heat exchange device. The pump assembly includes: a lower flange; a lower friction-reducing ring; a cylinder, the lower friction-reducing ring being disposed inside the cylinder, and the lower flange being disposed below the cylinder; and a piston assembly arranged inside the cylinder and includes a piston sleeve and a piston slidably arranged inside the piston sleeve. The lower friction-reducing ring has a central hole. A position-limiting protrusion is disposed on a surface of the piston sleeve, which faces the lower flange. The limiting protrusion extends into the central hole of the lower friction-reducing ring, fits and is limited by the lower flange.