Gas-liquid separation device

A gas-liquid separation device, comprising:

• a cylinder, the cylinder defining a first cavity, a second cavity and a third cavity, the first cavity being in communication with the second cavity, the second cavity being in communication with the third cavity;
• an external port, the external port comprising a first port, a second port and a third port, the first port being in communication with the first cavity, the second port being in communication with the second cavity;
• an adapter, the adapter being at least partially disposed in the cylinder, the adapter defining a first channel and a second channel, a lower end of the second channel and a lower end of the first channel being both located in the third cavity, the lower end of the second channel being lower than the lower end of the first channel, the second channel being in communication with the first cavity and the third cavity;
• and
• a gas-liquid separation component, the gas-liquid separation component being located in the third cavity, and being adapted to separate a gas-liquid two-phase refrigerant that enters the third cavity from the second cavity;
• wherein when the gas-liquid separation device is in a first working state, the first channel is closed so that the third port is not in communication with the third cavity;
• the first port serves as an inlet, and the second port serves as an outlet;
• when the gas-liquid separation device is in a second working state, the first channel is opened so that the third port is in communication with the third cavity;
• the second port serves as an inlet, the first port being in communication with the second channel serves as an outlet for a liquid-phase refrigerant after being separated from the gas-liquid two-phase refrigerant, and the third port being in communication with the first channel serves as an outlet of a gas-phase refrigerant after being separated from the gas-liquid two-phase refrigerant;
• or, the first port serves as an inlet, the second port serves as an outlet for the liquid-phase refrigerant or an outlet for the gas-liquid two-phase refrigerant, and the third port being in communication with the first channel serves as an outlet for the gas-phase refrigerant after being separated from the gas-liquid two-phase refrigerant.