Air conditioning system and control method for air conditioning system

Patent metadata

Field	Value
Publication number	US-11739991-B2
Application number	US-201817046291-A
Country	US
Kind code	B2
Filing date	Aug 28, 2018
Priority date	Apr 9, 2018
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

An air conditioning system, including a compressor, two outdoor heat exchange units, a liquid pipe used for communicating with indoor units, a high-pressure gas tube and a low-pressure gas tube; the air conditioning system further includes a valve assembly. One outdoor heat exchange unit has a first state in which one end thereof communicates with the high-pressure gas tube and another end thereof communicates with the liquid pipe, and has a second state in which one end thereof communicates with the low-pressure gas tube and the other end thereof communicates with the liquid pipe. Further disclosed is a control method for the air conditioning system.

First claim

What is claimed is:

1. An air conditioning system, comprising a compressor, two outdoor heat exchange units, a liquid pipe, a high-pressure gas pipe being in communication with an exhaust port of the compressor, a low-pressure gas pipe being in communication with an intake port of the compressor, and a valve assembly;
wherein one outdoor heat exchange unit has a first state; in the first state, one end of the one outdoor heat exchange unit is in communication with the high-pressure gas pipe, and another end thereof is in communication with the liquid pipe;
the one outdoor heat exchange unit has a second state; in the second state, the one end of the one outdoor heat exchange unit is in communication with the low-pressure gas pipe, and the other end thereof is in communication with the liquid pipe;
another outdoor heat exchange unit has a third state; in the third state, one end of the other outdoor heat exchange unit is in communication with the liquid pipe, and another end thereof is in communication with the high-pressure gas pipe via the valve assembly;
the other outdoor heat exchange unit has a fourth state; in the fourth state, the one end of the outdoor heat exchange unit is in communication with the liquid pipe, and the other end thereof is in communication with the low-pressure gas pipe via the valve assembly;
the valve assembly controls the outdoor heat exchange unit to switch between the third state and the fourth state;
the valve assembly comprises a high-pressure solenoid valve and a low-pressure solenoid valve;
the high-pressure solenoid valve has one end that forms a high-pressure inlet of the valve assembly, and another end that forms a high-pressure outlet of the valve assembly;
the low-pressure solenoid valve has one end being in communication with the high-pressure outlet, and another end that forms a low-pressure outlet of the valve assembly;
the high-pressure inlet is directly or indirectly in communication with the exhaust port of the compressor; the high-pressure outlet is in communication with the corresponding outdoor heat exchange unit; and the low-pressure outlet is in communication with the low-pressure gas pipe;
the air conditioning system further comprises a cooling four-way valve; a port D of the cooling four-way valve is in communication with the exhaust port of the compressor, a port S of the cooling four-way valve is in communication with the low-pressure gas pipe, a port C of the cooling four-way valve is in communication with the one outdoor heat exchange unit and the high-pressure inlet, respectively; the high-pressure outlet is in communication with the other outdoor heat exchange unit and a port E of the cooling four-way valve is in communication with the intake port of the compressor via a throttling device, or a port E of the cooling four-way valve is arranged to be closed.

2. The air conditioning system according to claim 1 , wherein the valve assembly further comprises a low-pressure bypass solenoid valve; the low-pressure bypass solenoid valve has one end being in communication with the high-pressure outlet, and another end being in communication with the low-pressure outlet.

3. The air conditioning system according to claim 1 , wherein the valve assembly comprises a second four-way valve; a port S of the second four-way valve is in communication with the low-pressure gas pipe, a port C of the second four-way valve is in communication with the one outdoor heat exchange unit, and a port D of the second four-way valve is in communication with the high-pressure gas pipe.

4. The air conditioning system according to claim 3 , wherein the air conditioning system further comprises a first four-way valve, a high-pressure valve, and a low-pressure valve;
a port D of the first four-way valve is in communication with the high-pressure gas pipe, a port S of the first four-way valve is in communication with the low-pressure gas pipe, a port C of the first four-way valve is in communication with the port D of the second four-way valve and the other outdoor heat exchange unit, respectively;
the high-pressure valve is disposed on the high-pressure gas pipe; and
the low-pressure valve has one end being in communication with the high-pressure gas pipe, and another end being in communication with the low-pressure gas pipe.

5. The air conditioning system according to claim 4 , wherein a port E of the second four-way valve is in communication with the intake port of the compressor via a throttling device, or a port E of the second four-way valve is arranged to be closed; and
a port E of the first four-way valve is in communication with the intake port of the compressor via a throttling device, or a port E of the first four-way valve is arranged to be closed.

6. The air conditioning system according to claim 1 , wherein the high-pressure inlet and the high-pressure outlet are both in communication with the high-pressure gas pipe, and the low-pressure outlet is in communication with the lower-pressure gas pipe.

7. The air conditioning system according to claim 1 , wherein the air conditioning system further comprises a supercooling device; the supercooling device is provided with a refrigerant channel and a supercooling channel; two ends of the refrigerant channel are in communication with the liquid pipe; the supercooling channel has one end being in communication with the low-pressure gas pipe, and another end being in communication with an inlet of the supercooling device via a supercooling throttling device; a portion of liquid refrigerant enters the supercooling device through the supercooling throttling device, supercooling refrigerant passing through the supercooling channel.

8. The air conditioning system according to claim 1 , wherein the air conditioning system further comprises a liquid reservoir; the liquid reservoir is provided with a high-pressure inlet, a liquid inlet, and a gas outlet; the high-pressure inlet is in communication with the high-pressure gas pipe; the liquid inlet is in communication with the liquid pipe; and the gas outlet is in communication with the low-pressure gas pipe;
the liquid reservoir further comprises a pressure relief branch; the pressure relief branch has one end being in communication with the high-pressure inlet, and another end being in communication with the low-pressure gas pipe via a pressure relief throttling device.

9. The air conditioning system according to claim 1 , wherein the air conditioning system further comprises an Intelligent Power Module (IPM) heat dissipation structure, and an inlet and an outlet of the IPM heat dissipation structure are both in communication with the liquid pipe.

10. The air conditioning system according to claim 1 , wherein the low-pressure gas pipe is in communication with a gas supplementing port of the compressor, and a portion of gaseous refrigerant enters the compressor from the gas supplementing port of the compressor.

11. The air conditioning system according to claim 1 , wherein each outdoor heat exchange unit is in communication with the liquid pipe via an outdoor throttling device.

12. An air conditioning system, comprising a compressor, two outdoor heat exchange units, a liquid pipe, a high-pressure gas pipe being in communication with an exhaust port of the compressor, a low-pressure gas pipe being in communication with an intake port of the compressor, and a valve assembly;
wherein one outdoor heat exchange unit has a first state; in the first state, one end of the one outdoor heat exchange unit is in communication with the high-pressure gas pipe, and another end thereof is in communication with the liquid pipe;
the one outdoor heat exchange unit has a secon

Assignees

• Gree Electric Appliances Wuhan Co Ltd
• Gree Electric Appliances Inc Zhuhai

Inventors

• Zhang Shiqiang
• Wu Lianfa
• Li Limin
• Jiao Huachao
• Zhou Bing
• Cao Peng
• Feng Tao

Classifications

• F25B13/00 Primary

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title

• F24F1/0068

  characterised by the arrangement of refrigerant piping outside the heat exchanger within the unit casing · CPC title

• F24F1/32

  for connecting the separate outdoor units to indoor units · CPC title

• F24F1/48

  characterised by air airflow, e.g. inlet or outlet airflow · CPC title

• F24F11/30

  for purposes related to the operation of the system, e.g. for safety or monitoring · CPC title