Air conditioning system, air conditioner outdoor unit and compressor assembly

An air conditioner outdoor unit, comprising:

• a four-way valve, comprising a first interface, a second interface, a third interface, and a fourth interface;
• an outdoor heat exchanger, a first port of the outdoor heat exchanger being connected to the first interface;
• and
• a compressor assembly, comprising:
• a first compressor comprising a first exhaust port and a first gas return port;
• a second compressor comprising a second exhaust port and a second gas return port;
• a first oil separator comprising a first oil outlet and a first oil separator inlet, the first oil separator inlet being connected to the first exhaust port;
• a second oil separator comprising a second oil outlet and a second oil separator inlet, the second oil separator inlet being connected to the second exhaust port;
• a storage container having an accommodation chamber and comprising a refrigerant inlet connected to the accommodation chamber, wherein the first oil outlet and the second oil outlet are each connected to the refrigerant inlet;
• a gas-liquid separator having a separation chamber and comprising a first gas separator outlet, a second gas separator outlet, a first oil return hole and a second oil return hole, wherein the first gas separator outlet and the first oil return hole are each connected to the first gas return port, and the second gas separator outlet and the second oil return hole are each connected to the second gas return port;
• and
• a liquid balance pipe and a gas balance pipe above the liquid balance pipe, wherein a first end of the liquid balance pipe and a first end of the gas balance pipe are both connected to the accommodation chamber, while a second end of the liquid balance pipe and a second end of the gas balance pipe are both connected to the separation chamber,
• wherein the first oil separator comprises a first oil separator outlet, and the second oil separator comprises a second oil separator outlet;
• the first oil separator outlet and the second oil separator outlet are each connected to the second interface;
• and the refrigerant inlet is connected to the fourth interface;
• wherein the compressor assembly is configured to distribute a refrigeration oil and a refrigerant to enter the accommodation chamber of the storage container firstly, and then enter the separation chamber of the gas-liquid separator through the liquid balance pipe and the gas balance pipe.

An air conditioning system, comprising:

• an air conditioner outdoor unit, comprising:
• a four-way valve, comprising a first interface, a second interface, a third interface, and a fourth interface;
• an outdoor heat exchanger, a first port of the outdoor heat exchanger being connected to the first interface;
• and
• a compressor assembly, comprising:
• a first compressor comprising a first exhaust port and a first gas return port;
• a second compressor comprising a second exhaust port and a second gas return port;
• a first oil separator comprising a first oil outlet and a first oil separator inlet, the first oil separator inlet being connected to the first exhaust port;
• a second oil separator comprising a second oil outlet and a second oil separator inlet, the second oil separator inlet being connected to the second exhaust port;
• a storage container having an accommodation chamber and comprising a refrigerant inlet connected to the accommodation chamber, wherein the first oil outlet and the second oil outlet are each connected to the refrigerant inlet;
• a gas-liquid separator having a separation chamber and comprising a first gas separator outlet, a second gas separator outlet, a first oil return hole and a second oil return hole, wherein the first gas separator outlet and the first oil return hole are each connected to the first gas return port, and the second gas separator outlet and the second oil return hole are each connected to the second gas return port;
• and
• a liquid balance pipe and a gas balance pipe above the liquid balance pipe, wherein a first end of the liquid balance pipe and a first end of the gas balance pipe are both connected to the accommodation chamber, while a second end of the liquid balance pipe and a second end of the gas balance pipe are both connected to the separation chamber,
• wherein the first oil separator comprises a first oil separator outlet, and the second oil separator comprises a second oil separator outlet;
• the first oil separator outlet and the second oil separator outlet are each connected to the second interface;
• and the refrigerant inlet is connected to the fourth interface;
• and
• an air conditioner indoor unit comprising an indoor heat exchanger,
• wherein a second port of the outdoor heat exchanger is connected to a first port of the indoor heat exchanger, and a second port of the indoor heat exchanger is connected to the third interface;
• wherein the compressor assembly is configured to distribute a refrigeration oil and a refrigerant to enter the accommodation chamber of the storage container firstly, and then enter the separation chamber of the gas-liquid separator through the liquid balance pipe and the gas balance pipe.