Refrigerant distributor and refrigeration cycle device

A refrigeration cycle device comprising:

• a lower stage compression mechanism configured to compress low-pressure refrigerant until the refrigerant is turned into intermediate-pressure refrigerant and to discharge the intermediate-pressure refrigerant;
• a higher stage compression mechanism configured to compress the intermediate-pressure refrigerant discharged from the lower stage compression mechanism until the refrigerant is turned into high-pressure refrigerant and to discharge the high-pressure refrigerant;
• a radiator configured to radiate heat from the refrigerant flowing out of the higher stage compression mechanism;
• a refrigerant distributor having a refrigerant inflow port from which the refrigerant from the radiator is introduced therein and first and second refrigerant outflow ports from which the refrigerant flows out;
• and
• an evaporator disposed to evaporate refrigerant at a refrigerant downstream side of the first refrigerant outflow port, and letting the refrigerant flow out to a suction side of the lower stage compression mechanism, wherein
• the refrigerant distributor includes a body portion defining a swirl space in which the refrigerant flowing from the refrigerant inflow port is swirled,
• when the line connecting the swirl centers of refrigerant swirling in the swirl space is taken as swirl center line, the refrigerant in the swirl space swirls at such a velocity of swirl flow that more vapor-phase refrigerant exists on an inner radius side than on an outer radius side and the velocity of swirl flow on the swirl center line at one end side and the velocity of swirl flow on the swirl center line at the other end side are different from each other,
• the swirl space is configured such that a vapor phase ratio of the refrigerant at the other end side in the swirl space is higher than the vapor phase ratio at the one end side in the swirl space,
• the first refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the one end side,
• the second refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the other end side, and
• the second refrigerant outflow port is coupled to a suction side of the higher stage compression mechanism.

A refrigeration cycle device comprising:

• a compressor configured to compress a refrigerant;
• a radiator configured to radiate heat from the refrigerant flowing out of the compressor;
• a refrigerant distributor causing the refrigerant flowing out of the radiator to flow thereinto from a refrigerant inflow port and causing the refrigerant to flow out of first and second refrigerant outflow ports;
• and
• an evaporator disposed to evaporate refrigerant at a refrigerant downstream side of the first refrigerant outflow port, and letting the refrigerant flow out to a suction side of the compressor, wherein
• the refrigerant distributor includes a body portion defining a swirl space in which the refrigerant flowing from the refrigerant inflow port is swirled,
• when the line connecting the swirl centers of refrigerant swirling in the swirl space is taken as swirl center line, the refrigerant in the swirl space swirls at such a velocity of swirl flow that more vapor-phase refrigerant exists on an inner radius side than on an outer radius side and the velocity of swirl flow on the swirl center line at one end side and the velocity of swirl flow on the swirl center line at the other end side are different from each other,
• the swirl space is configured such that a vapor phase ratio of the refrigerant at the other end side in the swirl space is higher than the vapor phase ratio at the one end side in the swirl space,
• the first refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the one end side,
• the second refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the other end side, and
• the second refrigerant outflow port is coupled to a suction side of the compressor.

A refrigeration cycle device comprising:

• a lower stage compression mechanism configured to compress a low-pressure refrigerant until the refrigerant is turned into intermediate-pressure refrigerant, and to discharge the intermediate-pressure refrigerant;
• a higher stage compression mechanism configured to compress the intermediate-pressure refrigerant discharged from the lower stage compression mechanism until the refrigerant is turned in high-pressure refrigerant, and to discharge the high-pressure refrigerant;
• a radiator configured to radiate heat from the high-pressure refrigerant discharged from the higher stage compression mechanism;
• a bifurcating portion bifurcating a flow of refrigerant flowing out of the radiator into a first stream and a second stream;
• a refrigerant distributor having a refrigerant inflow port from which the refrigerant of the first stream bifurcated at the bifurcating portion is introduced, and first and second refrigerant outflow ports from which the refrigerant flows out;
• an outflow-side evaporator disposed to evaporate the refrigerant at a refrigerant downstream side of the first refrigerant outflow port, and letting the refrigerant flow out to a suction side of the lower stage compression mechanism;
• a suction-side decompression portion configured to decompress the refrigerant of the second stream bifurcated at the bifurcating portion;
• and
• a suction-side evaporator disposed to evaporate the refrigerant decompressed by the suction-side decompression portion, wherein
• the refrigerant distributor includes a body portion defining a swirl space for swirling the refrigerant flowing from the refrigerant inflow port,
• when a line connecting the swirl centers of refrigerant swirling in the swirl space is taken as swirl center line, the refrigerant swirls in the swirl space at such a velocity of swirl flow that more vapor-phase refrigerant exists on an inner radius side than on an outer radius side and the velocity of swirl flow on the swirl center line at one end side and the velocity of swirl flow on the swirl center line at the other end side are different from each other,
• the swirl space is configured such that a vapor phase ratio of the refrigerant in the swirl space on the other end side is higher than a vapor phase ratio in the swirl space on the one end side,
• the first refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the one end side,
• the second refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the other end side,
• the refrigerant distributor includes
• a tapered portion connected to the first refrigerant outflow port, the tapered portion having therein a refrigerant passage area gradually enlarged toward a refrigerant downstream side, and
• a body member including a refrigerant suction port from which refrigerant is drawn by a jet flow of the refrigerant injected from the tapered portion, and a diffuser portion for increasing a pressure of mixed refrigerant of the refrigerant injected from the tapered portion and the refrigerant drawn from the refrigerant suction port,
• a refrigerant outlet side of the suction-side evaporator is coupled to the refrigerant suction port of the body member, and
• the second refrigerant outflow port is coupled to a suction side of the higher stage compression mechanism.

A refrigeration cycle device comprising:

• a compressor configured to compress refrigerant;
• a radiator configured to radiate heat from the refrigerant discharged from the compressor;
• a bifurcating portion bifurcating a flow of refrigerant flowing out of the radiator into a first stream and a second stream;
• a refrigerant distributor having a refrigerant inflow port from which the refrigerant of the first stream bifurcated at the bifurcating portion is introduced, and first and second refrigerant outflow ports from which the refrigerant flows out;
• an outflow-side evaporator disposed to evaporate the refrigerant at a refrigerant downstream side of the first refrigerant outflow port, and letting the refrigerant flow out to a suction side of the compressor;
• a suction-side decompression portion configured to decompress the refrigerant of the second stream bifurcated at the bifurcating portion;
• and
• a suction-side evaporator connected to the suction-side decompression portion to evaporate the refrigerant decompressed by the suction-side decompression portion, wherein
• the refrigerant distributor includes a body portion defining a swirl space for swirling the refrigerant flowing from the refrigerant inflow port,
• when a line connecting the swirl centers of refrigerant swirling in the swirl space is taken as swirl center line, the refrigerant swirls in the swirl space at such a velocity of swirl flow that more vapor-phase refrigerant exists on an inner radius side than on an outer radius side and the velocity of swirl flow on the swirl center line at one end side in the swirl space and the velocity of swirl flow on the swirl center line at the other end side in the swirl space are different from each other,
• the swirl space is configured such that a vapor phase ratio of the refrigerant in the swirl space on the other end side is higher than a vapor phase ratio on the one end side,
• the first refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the one end side,
• the second refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the other end side,
• the refrigerant distributor includes
• a tapered portion connected to the first refrigerant outflow port, the tapered portion having therein a refrigerant passage area gradually enlarged toward a refrigerant downstream side, and
• a body member including a refrigerant suction port from which refrigerant is drawn by a jet flow of the refrigerant injected from the tapered portion, and a diffuser portion for increasing a pressure of mixed refrigerant of the refrigerant injected from the tapered portion and the refrigerant drawn from the refrigerant suction port,
• a refrigerant outlet side of the suction-side evaporator is coupled to the refrigerant suction port of the body member, and
• the second refrigerant outflow port is coupled to the suction side of the compressor.

A refrigeration cycle device comprising:

• a compressor configured to compress refrigerant;
• a radiator configured to radiate heat from the refrigerant discharged from the compressor;
• a refrigerant distributor having a refrigerant inflow port from which the refrigerant flowing out of the radiator is introduced, and first and second refrigerant outflow ports from which the refrigerant flows out;
• an outflow-side evaporator disposed to evaporate the refrigerant flowing from the first refrigerant outflow port, and letting the refrigerant flow out to a suction side of the compressor;
• and
• a suction-side evaporator disposed to evaporate the refrigerant flowing from the second refrigerant outflow port, wherein
• the refrigerant distributor includes a body portion defining a swirl space for swirling the refrigerant flowing from the refrigerant inflow port,
• when a line connecting the swirl centers of refrigerant swirling in the swirl space is taken as swirl center line, the refrigerant swirls in the swirl space at such a velocity of swirl flow that more vapor-phase refrigerant exists on an inner radius side than on an outer radius side and the velocity of swirl flow on the swirl center line at one end side in the swirl space and the velocity of swirl flow on the swirl center line at the other end side in the swirl space are different from each other,
• the swirl space is configured such that a vapor phase ratio of the refrigerant in the swirl space on the other end side is higher than a vapor phase ratio on the one end side,
• the first refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the one end side,
• the second refrigerant outflow port is configured to reduce a refrigerant passage area so as to decompress refrigerant and is arranged on an extended line of the swirl center line at the other end side,
• the refrigerant distributor includes
• a tapered portion connected to the first refrigerant outflow port, the tapered portion having therein a refrigerant passage area gradually enlarged toward a refrigerant downstream side, and
• a body member including a refrigerant suction port from which refrigerant is drawn by a jet flow of the refrigerant injected from the tapered portion, and a diffuser portion for increasing a pressure of mixed refrigerant of the refrigerant injected from the tapered portion and the refrigerant drawn from the refrigerant suction port, and
• a refrigerant outlet side of the suction-side evaporator is coupled to the refrigerant suction port of the body member.