Rotor assembly, compressor and air conditioner

Patent metadata

Field	Value
Publication number	US-12305641-B2
Application number	US-202118269428-A
Country	US
Kind code	B2
Filing date	Oct 25, 2021
Priority date	Feb 26, 2021
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A compressor, including: a first rotor being rotatable around a first axis, the first rotor including a first portion and a second portion; and a first shaft carrying the first portion and the second portion, the first shaft having a first end and a second end that are oppositely arranged. The first rotor is configured to be applied with a preset acting force in a direction from the first end toward the second end or from the second end toward the first end during rotation. The size of the compressor can be reduced with the displacement of the compressor remaining substantially unchanged.

First claim

The invention claimed is:

1. A compressor, comprising:
a first rotor being rotatable around a first axis, the first rotor comprising a first portion and a second portion;
a first shaft configured to carry the first portion and the second portion, the first shaft having a first end and a second end that are oppositely arranged; and
a housing accommodating the first rotor and a portion of the first shaft;
wherein the first rotor is configured to be applied with a preset acting force in a direction from the first end toward the second end or from the second end toward the first end during rotation,
a second rotor being rotatable around a second axis, the second rotor comprising a third portion engaged with the first portion and a fourth portion engaged with the second portion;
a second shaft configured to carry the third portion and the fourth portion; and
the housing accommodating the second rotor and a portion of the second shaft;
wherein the second rotor is configured to be applied with a preset acting force in a direction from the first end toward the second end or from the second end toward the first end during the rotation of the first rotor and the second rotor; and
wherein at least one of the first portion and the third portion is provided with first air supply holes, the second portion and the fourth portion is provided with second air supply holes, the first air supply holes and the second air supply holes are configured to be different from each other to generate an air pressure difference during the rotation of the first rotor and the second rotor to form the preset acting force.

2. The compressor according to claim 1 , wherein the compressor is configured to satisfy at least one of the following:
a shape of the first portion is different from shapes of the second portion and the fourth portion; and
a shape of the third portion is different from shapes of the second portion and the fourth portion, so that an air pressure difference is generated during the rotation of the first rotor and the second rotor to form the preset acting force.

3. The compressor according to claim 1 , wherein shapes of the first portion, the second portion, the third portion and the fourth portion comprise any one of the following: length, a number of helical blades, end surface profile, a density of the helical blades, and diameter.

4. The compressor according to claim 1 , wherein the compressor is configured to satisfy at least one of the following:
a number of first air supply holes is different from a number of second air supply holes; and/or
a size of the first air supply hole is different from a size of the second air supply hole;
a distance between the first air supply holes and an end surface of the first portion away from the second portion is different from a distance between the second air supply holes and an end surface of the second portion away from the first portion; and
a distance between the first air supply holes and an end surface of the third portion away from the fourth portion is different from a distance between the second air supply holes and an end surface of the fourth portion away from the third portion.

5. The compressor according to claim 1 , wherein the compressor is configured to satisfy at least one of the following: at least one of the first portion and the third portion is provided with air supply holes; and at least one of the second portion and the fourth portion is provided with air supply holes.

6. The compressor according to claim 1 , wherein the compressor is configured to satisfy at least one of the following:
a portion of the housing corresponding to the first portion has a different shape from portions of the housing corresponding to the second portion and the fourth portion; and
a portion of the housing corresponding to the third portion has a different shape from the portions of the housing corresponding to the second portion and the fourth portion so that an air pressure difference is generated during the rotation of the first rotor and the second rotor to form the preset acting force.

7. The compressor according to claim 1 , wherein the housing is provided with a first exhaust port and a second exhaust port, and a length of the first exhaust port along a direction from the first end toward the second end is different from a length of the second exhaust port along a direction from the second end toward the first end.

8. The compressor according to claim 1 , wherein the compressor is configured to satisfy at least one of the following:
the portion of the housing corresponding to the first portion;
the portion of the housing corresponding to the third portion is provided with first air supply holes, and the portion of the housing corresponding to the second portion;
the portion of the housing corresponding to the fourth portion is provided with second air supply holes;
a number of first air supply holes is different from a number of second air supply holes;
a size of the first air supply hole is different from a size of the second air supply hole;
a distance between the first air supply holes and an end surface of the first portion away from the second portion is different from a distance between the second air supply holes and an end surface of the second portion away from the first portion; and
a distance between the first air supply holes and an end surface of the third portion away from the fourth portion is different from a distance between the second air supply holes and an end surface of the fourth portion away from the third portion.

9. The compressor according to claim 1 , wherein the compressor is configured to satisfy at least one of the following:
at least one of the portion of the housing corresponding to the first portion and the portion of the housing corresponding to the third portion is provided with air supply holes, and
at least one of the portion of the housing corresponding to the second portion and the portion of the housing corresponding to the fourth portion is provided with air supply holes.

10. The compressor according to claim 1 , wherein the first portion and the second portion are arranged along the direction of gravity, the third portion and the fourth portion are arranged along the direction of gravity, and the gravity of the first portion, the second portion, the third portion, the fourth portion, the first shaft and the second shaft causes the first rotor and the second rotor to be applied with the preset acting force during the rotation of the first rotor and the second rotor; or
the arrangement direction of the first portion and the second portion has an included angle less than 90 degrees relative to the direction of gravity, the arrangement direction of the third portion and the fourth portion is the same as that of the first portion and the second portion, component forces of the first portion, the second portion, the third portion, the fourth portion, the first shaft and the second shaft along the direction of gravity cause the first rotor and the second rotor to be applied with the preset acting force during the rotation of the first rotor and the second rotor.

11. The compressor according to claim 1 , wherein a pressure of an oil acting on the first end is lower than a pressure of an oil acting on the second end, so that the first rotor and the second rotor are applied with the preset acting force during rotation; or
a pressure of an oil acting on a third end of the second shaft is lower than a pressure of an oil acting on a fourth end of the second shaft so that the first rotor and the second rotor are applied with the preset acting force during rotation.

12. The compressor acco

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Tan Jianming
• Liu Hua
• Zhang Zhiping
• Tang Han
• Wu Xiaokun
• Long Zhongkeng

Classifications

• F04C18/165

  having more than two rotary pistons with parallel axes · CPC title

• F04C2240/52

  for assemblies with supports on both sides · CPC title

• F04C2240/20

  Rotors · CPC title

• F04C29/12

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04C29/0021

  Systems for the equilibration of forces acting on the pump (interstice adjustment other than by fluid pressure F01C21/102) · CPC title