Compressor and air conditioner

Patent metadata

Field	Value
Publication number	US-12410794-B2
Application number	US-202418814186-A
Country	US
Kind code	B2
Filing date	Aug 23, 2024
Priority date	May 30, 2022
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A compressor and an air conditioner. The compressor includes a crankshaft, a first roller, a second roller, a motor rotor and one balancing block. The interior of the first roller is a solid structure, and the interior of the second roller has a hollow portion. The balancing block is disposed at one axial end of the motor rotor, and no balancing block is arranged at another axial end of the motor rotor. A mass center of the first eccentric portion and the first roller is a first mass center, and a first mass-center axis passes through the first mass center and is parallel to an axis of the crankshaft. A mass center of the second eccentric portion and the second roller is a second mass center, and a second mass-center axis passes through the second mass center and is parallel to the axis of the crankshaft.

First claim

What is claimed is:

1. A compressor, comprising:
a crankshaft, wherein the crankshaft comprises a first eccentric portion and a second eccentric portion, and the first eccentric portion and the second eccentric portion are located on different shaft sections of the crankshaft respectively;
a first roller sleeved on an outer circumference of the first eccentric portion, the interior of the first roller being a solid structure;
a second roller sleeved on an outer circumference of the second eccentric portion, the interior of the second roller having a hollow portion to form a cavity;
a motor rotor sleeved on the crankshaft; and
one balancing block disposed at an axial end of the motor rotor;
wherein a mass center of the first eccentric portion and the first roller is a first mass center, and an first mass-center axis passes through the first mass center and is parallel to an axis of the crankshaft; a mass center of the second eccentric portion and the second roller is a second mass center, and a second mass-center axis passes through the second mass center and is parallel to the axis of the crankshaft; and a mass center of the balancing block, the first mass-center axis and the second mass-center axis are located in the same plane; and
in the plane, the first mass center is located on a first side of the axis of the crankshaft, and the mass center of the balancing block is located on a second side of the axis of the crankshaft, and the axis of the crankshaft is located between the mass center of the balancing block and the first mass center; and the second mass center is located on the second side of the axis of the crankshaft;
wherein one hollow portion is formed, and the hollow portion is an annular cavity; the second roller is divided by the annular cavity into a radial inner wall, a radial outer wall, a first axial end and a second axial end; a radial thickness of the radial inner wall is b; a radial thickness of the radial outer wall is a; an axial thickness of the first axial end is c; an axial thickness of the second axial end is d; a total radial thickness of the second roller is t; a total axial thickness of the second roller is h; and it is satisfied that:

a
≥

1
4

⁢
t

,

b
≥

1
4

⁢
t

,

c
≥

1
8

⁢
h

,

and
⁢

d

≥

1
8

⁢

h
.

2. The compressor according to claim 1 , wherein the first roller is located between the motor rotor and the second roller along an axis direction of the crankshaft.

3. The compressor according to claim 2 , wherein the balancing block is disposed on the motor rotor and is located at one axial end of the motor rotor away from the first roller along the axis direction of the crankshaft; or
the balancing block is arranged on the motor rotor and is located at another axial end of the motor rotor adjacent to the first roller along the axis direction of the crankshaft.

4. The compressor according to claim 2 , wherein the first roller is located in an inner cavity of the upper cylinder, upper end surfaces of the upper cylinder and of the first roller are in contact with a lower end surface of an upper flange, and lower end surfaces of the upper cylinder and of the first roller are in contact with an upper end surface of a partition plate; and
the second roller is located in an inner cavity of the lower cylinder, upper end surfaces of the lower cylinder and of the second roller are in contact with a lower end surface of the partition plate, and lower end surfaces of the lower cylinder and of the second roller are in contact with an upper end surface of a lower flange.

5. The compressor according to claim 4 , wherein a long shaft section of the crankshaft is configured to pass through an inner hole of the upper flange, a middle shaft section of the crankshaft is configured to pass through an inner hole of the partition plate, and a short shaft section of the crankshaft is configured to pass through an inner hole of the lower flange.

6. The compressor according to claim 4 , wherein the upper cylinder and the lower cylinder have the same inner diameter and have the same cylinder height; the first roller and the second roller have the same inner diameter, the same outer diameter, and the same height, respectively; and the first eccentric portion and the second eccentric portion of the crankshaft have the same structure and are arranged on two sides of the crankshaft respectively with a location difference of 180°.

7. The compressor according to claim 1 , wherein the compressor is a vertical compressor, the first roller and the second roller are arranged vertically; the first roller is located above the second roller; the motor rotor is located above the first roller; and the balancing block is arranged on an upper end surface of the motor rotor or on a lower end surface of the motor rotor.

8. The compressor according to claim 1 , wherein a mass of the first roller and the first eccentric portion is m 1 ; the minimum distance between the first mass center and the axis of the crankshaft is r 1 ; a mass of the second roller and the second eccentric portion is m 0 ; the minimum distance between the second mass center and the axis of the crankshaft is r 0 ; a mass of the balancing block is m 2 ; the minimum distance between the mass center of the balancing block and the axis of the crankshaft is r 2 ; and it is satisfied that:

0.8
≤

m
0

⁢

r
0

+

m
2

⁢

r
2

m
1

⁢

r
1

≤
1.

9. The compressor according to claim 1 , wherein a mass of the first roller and the first eccentric portion is m 1 ; the minimum distance between the first mass center and the axis of the crankshaft is r 1 ; a mass of the second roller and the second

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Dong Mingzhu
• Hu Yusheng
• Hu Yuanpei
• Wei Huijun
• Yang Ouxiang
• Zhang Xinai

Classifications

• F04C2240/601

  Shaft flexion · CPC title

• F04C2240/20

  Rotors · CPC title

• F04C18/356

  with vanes reciprocating with respect to the outer member · CPC title

• F04C23/001 Primary

  of similar working principle · CPC title

• F04C2250/301

  compression chamber profile defined by a mathematical expression or by parameters · CPC title