Compressor and air conditioner system

Patent metadata

Field	Value
Publication number	US-11713888-B2
Application number	US-201917049935-A
Country	US
Kind code	B2
Filing date	Jan 30, 2019
Priority date	Jun 22, 2018
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

A compressor includes: a first cylinder, the first cylinder being provided with a first gas intake and a first gas outlet, the first air outlet being connected to a predetermined heat exchanger; a second cylinder, the second cylinder being provided with a second gas intake and a second gas outlet, and the second gas outlet being connected to the predetermined heat exchanger; and a gas pre-exhausting device. The gas pre-exhausting device is provided on a cylinder block of the first cylinder or on an upper end surface of the first cylinder or a lower end surface of the first cylinder; the gas pre-exhausting device includes a gas pre-exhausting port and a first control valve controlling the gas pre-exhausting port to be open or closed; and the gas pre-exhausting port is connected to the second gas intake. Further disclosed is an air conditioner system including the compressor.

First claim

What is claimed is:

1. A compressor, comprising:
a first cylinder provided with a first gas intake and a first gas outlet, the first gas outlet being configured to be connected to a predetermined heat exchanger;
a second cylinder provided with a second gas intake and a second gas outlet, the second gas outlet being configured to be connected to the predetermined heat exchanger;
a gas pre-exhausting device disposed on a cylinder block of the first cylinder, or on an upper end surface of the first cylinder, or on a lower end surface of the first cylinder, the gas pre-exhausting device comprising a pre-exhausting port and a first control valve that controls the pre-exhausting port to be open or closed, the pre-exhausting port being connected to the second gas intake;
a connecting passage, wherein a first end of the connecting passage is in communication with the first gas outlet, and a second end of the connecting passage is in communication with the second gas intake; and
a switching control valve group disposed between the first cylinder and the second cylinder, and configured to enable the compressor to work in a double-stage enthalpy-increasing operating mode or a double-cylinder enthalpy-increasing operating mode or an unloaded operating mode.

2. The compressor according to claim 1 , wherein the first cylinder and the second cylinder is any combination of a rotor cylinder, a piston cylinder, and a scroll cylinder.

3. The compressor according to claim 1 , wherein the pre-exhausting port and the second gas intake are connected via an internal passage of the compressor or connected via a pipeline.

4. The compressor according to claim 1 , wherein a volume ratio of the second cylinder to the first cylinder is in a range from 0.1 to 0.7.

5. The compressor according to claim 1 , wherein the pre-exhausting port and the second gas intake are connected via an internal passage of the compressor or connected via a pipeline.

6. An air conditioner system, comprising the compressor of claim 1 .

7. The air conditioner system according to claim 6 , wherein a volume ratio of the second cylinder to the first cylinder is in a range from 0.1 to 0.7.

8. The air conditioner system according to claim 6 , wherein the air conditioner system further comprises a gas-liquid separator, a first heat exchanger, a second heat exchanger, a first throttling element, and a second throttling element,
wherein, an inlet of the first heat exchanger is connected to the first gas outlet and the second gas outlet; an outlet of the first heat exchanger is connected to an inlet of the first throttling element; an outlet of first throttling element is connected to an inlet of the gas-liquid separator; a bottom outlet of the gas-liquid separator is connected to an inlet of the second throttling element; an outlet of the second throttling element is connected to an inlet of the second heat exchanger; an outlet of the second heat exchanger is connected to the first gas intake; the first heat exchanger is the predetermined heat exchanger and a top outlet of the gas-liquid separator is connected to the second gas intake.

9. The air conditioner system according to claim 8 , wherein the air conditioner system further comprises an unloaded operating mode, and when the air conditioner system is in the unloaded operating mode: a vapor injection valve on a top of the gas-liquid separator is closed; high-temperature and high-pressure gaseous refrigerant is transformed into high-pressure supercooled liquid refrigerant via the first heat exchanger, and then enters the gas-liquid separator via the first throttling element; all refrigerant in the gas-liquid separator is throttled into low-pressure two-phase refrigerant via the second throttling element; the low-pressure two-phase refrigerant enters the second heat exchanger and evaporates in the second heat exchanger, and then is drawn in the first cylinder; gas of the second cylinder all is drawn from exhausted gas of the gas pre-exhausting device; when a back pressure of a compression chamber of the first cylinder is greater than a suction pressure of the second cylinder, the first control valve of the gas pre-exhausting device opens, and is not closed until a first cylinder rotor of the first cylinder rotates and passes the pre-exhausting port of the gas pre-exhausting device.

10. The air conditioner system according to claim 8 , wherein the air conditioner system comprises a double-cylinder enthalpy-increasing mode; when the air conditioner system is in the double-cylinder enthalpy-increasing mode, refrigerant is discharged from the first cylinder and the second cylinder of the compressor, and then is transformed into high-pressure supercooled liquid via the first heat exchanger, and enters the gas-liquid separator via the first throttling element; the refrigerant is divided into two flows in the gas-liquid separator; one flow of liquid refrigerant enters the second throttling element via the bottom outlet of the gas-liquid separator, and is throttled into low-pressure two-phase refrigerant, and then enters the second heat exchanger, and the low-pressure two-phase refrigerant evaporates into gaseous refrigerant in the second heat exchanger and is drawn in the first cylinder; another flow of refrigerant gas in the gas-liquid separator is mixed with refrigerant discharged from the gas pre-exhausting device via the top outlet of the gas-liquid separator, and then is drawn in the second cylinder.

11. The air conditioner system according to claim 10 , wherein when the air conditioner system is in the double-cylinder enthalpy-increasing mode, a compression process of the first cylinder is as follows: the compression process of the first cylinder starts from a moment a first cylinder rotor rotates to an apex position of a first cylinder sliding vane; before the first cylinder rotor rotates and passes the first gas intake, the compression process has not started, and the first control valve of the gas pre-exhausting device is closed; when the first cylinder rotor rotates from a closed suction position to a position where a pressure in a compression chamber reaches an intermediate pressure, the first control valve of the gas pre-exhausting device is closed; when the first cylinder rotor rotates to a position where the pressure in the compression chamber is greater than the intermediate pressure, the first control valve of the gas pre-exhausting device opens, and a pre-exhausting process starts; when the first cylinder rotor rotates and passes the pre-exhausting port, the pre-exhausting process ends, and the compression chamber continues to compress; when the pressure in the compression chamber reaches an exhaust pressure of the first cylinder, an exhaust process of the first cylinder starts; and when the first cylinder rotor ( 114 ) rotates and passes the first gas outlet, the exhaust process of the first cylinder ends, and the entire cycle is completed.

12. The compressor according to claim 1 , wherein the switching control valve group comprises:
a second control valve disposed on the connecting passage to control the connecting passage to be open or closed; and
a third control valve disposed on a refrigerant pipe connecting the first gas outlet and the predetermined heat exchanger, and configured to control the refrigerant pipe to be open or closed;
wherein when the second control valve opens, and when the third control valve is closed, the first control valve is always closed because of a back pressure, and the compressor is in the double-stage enthalpy-increasing operating mode; when the second control valve is closed, and when the third control valve opens, and while a pressure in a compression cha

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Liu Xingru
• Zheng Bo
• Liang Xiangfei

Classifications

• F24F1/029 Primary

  characterised by the layout or mutual arrangement of components, e.g. of compressors or fans · CPC title

• F24F1/022

  comprising a compressor cycle · CPC title

• F25B31/00

  Compressor arrangements · CPC title

• F25B41/20

  Disposition of valves, e.g. of on-off valves or flow control valves (expansion valves F25B41/31) · CPC title

• F25B41/30

  Expansion means; Dispositions thereof · CPC title