Refrigerant container

1. A refrigerant container comprising:

a tank configured to temporarily store a refrigerant;

a gas/liquid inlet port, a liquid-phase outlet port, and a gas-phase outlet port that are provided in an upper portion of the tank;

said the tank having an upper-face opening being hermetically closed by a cap member that includes the gas/liquid inlet port, the liquid-phase outlet port, and the gas-phase outlet port therein;

a gas-liquid separator being disposed below the cap member in the tank, the gas-liquid separator having a shape of a conical hat or an inverted wide bowl and having a smaller diameter than an inside diameter of the tank;

a gas/liquid outlet pipe being disposed between the cap member and a bottom of the tank, the gas/liquid outlet pipe being segmented into a downward-feed flow channel portion, an upward-feed pipe portion, and a liquid-phase pipe portion;

a strainer being provided at a lower end of the gas/liquid outlet pipe;

the downward-feed flow channel portion being open at an upper end of the downward-feed flow channel portion to a lower portion of the gas-liquid separator and being adapted to guide a gas-phase refrigerant in an upper portion of the tank to a portion around the bottom of the tank;

the upward-feed pipe portion protruding upward at an upper portion of the upward-feed flow channel portion beyond the upper end of the downward-feed flow channel portion and being adapted to guide the gas-phase refrigerant from the downward-feed flow channel portion to the gas-phase outlet port; and

the liquid-phase pipe portion being adapted to guide a liquid-phase refrigerant around the bottom of the tank to the liquid-phase outlet port,

wherein:

the refrigerant container is configured to separate the refrigerant introduced through the gas/liquid inlet port into the liquid-phase refrigerant and the gas-phase refrigerant, and is further configured to be switchable between a receiver configuration that guides only the liquid-phase refrigerant after the separation to a side of an expansion valve via the liquid-phase outlet port, and

an accumulator configuration that guides the gas-phase refrigerant after the separation to a suction side of a compressor via the gas-phase outlet port together with oil contained in the liquid-phase refrigerant,

wherein the refrigerator container further comprising an on-off valve configured to switch the refrigerator container from the receiver configuration to the accumulator configuration by opening and closing a flow channel guiding the gas-phase refrigerant in a portion of the refrigerator container defining the accumulator configuration, and

wherein the on-off valve is in an opened position switches the refrigerator container to the accumulator configuration and in a closed position switches the refrigerator container to the receiver configuration.

2. The refrigerant container according to claim 1 , wherein the gas-liquid separator is sandwiched between the cap member and the gas/liquid outlet pipe.

3. The refrigerant container according to claim 1 , wherein the on-off valve is disposed above the tank.

4. The refrigerant container according to claim 1 , wherein the on-off valve is an electromagnetic valve.

5. The refrigerant container according to claim 3 , wherein the on-off valve is an electromagnetic valve.