JPWO2021019770A5 - - Google Patents

Claims (7)

A refrigerant circuit including a compressor, a condenser, a drawing device, and an evaporator, and a double tube, in which a refrigerant circulates in the compressor, the condenser, the drawing device, the evaporator, and the double tube in order. Equipped with
The compressor includes a suction port for sucking the refrigerant.
The double tube has an inner tube and an outer tube arranged so as to surround the inner tube and connected to the suction port.
Inside the inner pipe, a first space connecting the evaporator and the suction port in the refrigerant circuit is formed.
Between the inner pipe and the outer pipe, a second space is formed which is partitioned from the first space by the inner pipe and is partitioned from the outer space of the double pipe by the outer pipe. Ori,
The end portion of the inner pipe located on the upstream side of the refrigerant circuit and the end portion of the outer pipe located on the upstream side of the refrigerant circuit are hermetically sealed.
The end portion of the inner pipe located on the downstream side of the refrigerant circuit and the end portion of the outer pipe located on the downstream side of the refrigerant circuit are arranged at a distance from each other.
Further equipped with at least a machine room for accommodating the compressor and the condenser inside.
The double tube is located only inside the machine room , a refrigerator. The throttle device comprises an electronic expansion valve and a capillary arranged in series with each other in the refrigerant circuit.
The capillary is arranged on the downstream side of the refrigerant circuit with respect to the electronic expansion valve.
The refrigerant circuit further includes a first pipe arranged between the evaporator and the double pipe.
The refrigerator according to claim 1, wherein the capillary and the first pipe form a heat exchange unit. According to claim 1 or 2 , the double pipe constitutes the entire portion of the refrigerant pipe connecting the evaporator and the suction port in the refrigerant circuit, which is arranged in the machine chamber. The listed refrigerator. The refrigerant circuit includes a second pipe arranged between the double pipe and the suction port inside the machine room.
The outer pipe is connected to the second pipe, and the outer pipe is connected to the second pipe.
A third space is formed inside the second pipe, which is connected between the evaporator and the suction port in the refrigerant circuit and is connected to the first space and the second space. The refrigerator according to item 1 or 2 . The double pipe constitutes a part of a part of the refrigerant pipe connecting the evaporator and the suction port in the refrigerant circuit, which is arranged in the machine chamber.
The second pipe constitutes the rest of the portion of the refrigerant pipe connecting between the evaporator and the suction port in the refrigerant circuit, which is arranged in the machine chamber.
The refrigerator according to claim 4 , wherein the second pipe has a bent portion inside the machine room. The refrigerator according to any one of claims 1 to 5 , wherein the outer pipe has an enlarged diameter portion whose outer diameter increases from the upstream side to the downstream side of the refrigerant circuit. The refrigerator according to any one of claims 1 to 6 , wherein the inner pipe has a reduced diameter portion whose outer diameter becomes smaller from the upstream side to the downstream side of the refrigerant circuit.