US 12,286,972 B2
Pump body assembly, fluid machinery, and heat exchange device
Mingzhu Dong, Zhuhai (CN); Yusheng Hu, Zhuhai (CN); Jia Xu, Zhuhai (CN); Zhongcheng Du, Zhuhai (CN); Liping Ren, Zhuhai (CN); and Lingchao Kong, Zhuhai (CN)
Assigned to GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Guangdong (CN)
Appl. No. 17/059,146
Filed by GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Guangdong (CN)
PCT Filed Dec. 12, 2018, PCT No. PCT/CN2018/120659
§ 371(c)(1), (2) Date Nov. 25, 2020,
PCT Pub. No. WO2020/015284, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 201810792233.8 (CN), filed on Jul. 18, 2018.
Prior Publication US 2021/0372408 A1, Dec. 2, 2021
Int. Cl. F04C 29/12 (2006.01); F04C 18/22 (2006.01); F04C 29/00 (2006.01)
CPC F04C 29/12 (2013.01) [F04C 18/22 (2013.01); F04C 29/0057 (2013.01); F04C 2240/10 (2013.01); F04C 2240/20 (2013.01); F04C 2240/60 (2013.01); F04C 2240/805 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A pump body assembly, comprising:
an upper flange;
a lower flange;
a cylinder, arranged between the upper flange and the lower flange;
a sliding block structure, rotatably arranged inside the cylinder, the sliding block structure comprising a connecting portion and two sliding sub-blocks arranged on the connecting portion, and the two sliding sub-blocks and an inner wall of the cylinder forming a first sliding hole;
a piston, slidably arranged inside the first sliding hole, a variable volume cavity being formed between the piston and an inner wall of the cylinder, and the piston having a second sliding hole; and
a rotation shaft, wherein at least a portion of the rotation shaft is slidably arranged inside the second sliding hole, and a slide included angle is formed between a first sliding direction, in which the piston slides relative to the first sliding hole, and a second sliding direction, in which the rotation shaft slides relative to the second sliding hole;
wherein: the two sliding sub-blocks each comprise an inner side approximately perpendicular to the connecting portion, the inner side of each of the two sliding sub-blocks faces the piston and is a flat surface; an upper side of the sliding block structure opposite to the connecting portion is open, and upper ends of the two sliding sub-blocks opposite to the connecting portion are aligned with a top of the piston;
there is at least one connecting portion; the at least one connecting portion is provided with a first through hole; and the rotation shaft passes through the first through hole;
the first through hole is arranged on the at least one connecting portion; a position-limiting protrusion is arranged on the lower flange; the first through hole and position-limiting protrusion are nested and fit to connect the sliding block structure with the lower flange;
the position-limiting protrusion extends into the first through hole to enable the sliding block structure to pivot relative to the lower flange; the position-limiting protrusion has a second through hole; and the rotation shaft passes through the second through hole.