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1. (US20180306515) AIR CONDITIONER
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Claims

1. An air conditioner comprising a heat exchanger comprising:
a plurality of heat-transfer pipes arranged to extend in a horizontal direction and to be spaced apart at predetermined intervals in a vertical direction and configured to allow a thermal medium to flow therein, wherein a part of the plurality of heat transfer pipes are used for at least one inflow path into which the thermal medium flows from an outside of the heat exchanger and the other part of the plurality of heat transfer pipes are used for at least one outflow path from which the thermal medium flows out to the outside of the heat exchanger; and
at least one connection pipe through which an outlet side of one of the at least one inflow path communicates with an inlet side of one of the at least one outflow path, the at least one connection pipe having a hydraulic diameter of 4 mm or greater,
wherein a circulation flow rate Gr kg/s of the thermal medium and a number of the at least one connection pipe N satisfy 0.003≤Gr/N≤0.035.
2. An air conditioner comprising a heat exchanger comprising:
a plurality of heat-transfer pipes arranged to extend in a horizontal direction and to be spaced apart at predetermined intervals in a vertical direction and configured to allow a thermal medium to flow therein, wherein a part of the plurality of heat transfer pipes are used for at least one inflow path into which the thermal medium flows from an outside of the heat exchanger and the other part of the plurality of heat transfer pipes are used for at least one outflow path from which the thermal medium flows out to the outside of the heat exchanger; and
at least one connection pipe through which an outlet side of one of the at least one inflow path communicates with an inlet side of one of the at least one outflow path, the at least one connection pipe having a hydraulic diameter of 4 mm or greater,
wherein a rated cooling capacity Q kW of the air conditioner and a number of the at least one connection pipe N satisfies 0.75≤Q/N≤3.5.
3. The air conditioner of claim 1,
Wherein the at least one inflow path comprises a plurality of inflow paths and the at least one outflow path comprises a plurality of outflow paths,
wherein at least one of the plurality of inflow paths communicates with one of the plurality of outflow paths located below the at least one of the plurality of inflow paths via one of the at least one connection pipe, and
wherein at least another one of the plurality of inflow paths communicates with another one of the plurality of outflow paths located above the at least another one of the plurality of inflow paths via another one of the at least one connection pipe.
4. The air conditioner of claim 1,
wherein the at least one connection pipe each has a hydraulic diameter of 11 mm or less.
5. The air conditioner of claim 1,
wherein each of the plurality of heat-transfer pipes is constituted by a tubular member with a cross section having a substantially oval shape, the tubular member having an interior divided into a plurality of flow channels extending in a length direction of the tubular member.
6. The air conditioner of claim 1,
wherein the thermal medium comprises at least one of the group consisting of R410A, R404A, R32, R1234yf, R1234ze(E), and HFO1123.
7. The air conditioner of claim 2,
Wherein the at least one inflow path comprises a plurality of inflow paths and the at least one outflow path comprises a plurality of outflow paths,
wherein at least one of the plurality of inflow paths communicates with one of the plurality of outflow paths located below the at least one of the plurality of inflow paths via one of the at least one connection pipe, and
wherein at least another one of the plurality of inflow paths communicates with another one of the plurality of outflow paths located above the at least another one of the plurality of inflow paths via another one of the at least one connection pipe.
8. The air conditioner of claim 2,
wherein the at least one connection pipe each has a hydraulic diameter of 11 mm or less.
9. The air conditioner of claim 2,
wherein each of the plurality of heat-transfer pipes is constituted by a tubular member with a cross section having a substantially oval shape, the tubular member having an interior divided into a plurality of flow channels extending in a length direction of the tubular member.
10. The air conditioner of claim 2,
wherein the thermal medium comprises at least one of the group consisting of R410A, R404A, R32, R1234yf, R1234ze(E), and HFO1123.
11. The air conditioner of claim 1,
wherein the circulation flow rate Gr is an amount of the thermal medium circulating per second when the air conditioner is in operation at a rated cooling capacity of the air conditioner.
12. The air conditioner of claim 11,
Wherein the at least one inflow path comprises a plurality of inflow paths and the at least one outflow path comprises a plurality of outflow paths,
wherein at least one of the plurality of inflow paths communicates with one of the plurality of outflow paths located below the at least one of the plurality of inflow paths via one of the at least one connection pipe, and
wherein at least another one of the plurality of inflow paths communicates with another one of the plurality of outflow paths located above the at least another one of the plurality of inflow paths via another one of the at least one connection pipe.
13. The air conditioner of claim 11,
wherein the at least one connection pipe each has a hydraulic diameter of 11 mm or less.
14. The air conditioner of claim 11,
wherein each of the plurality of heat-transfer pipes is constituted by a tubular member with a cross section having a substantially oval shape, the tubular member having an interior divided into a plurality of flow channels extending in a length direction of the tubular member.
15. The air conditioner of claim 11,
wherein the thermal medium comprises at least one of the group consisting of R410A, R404A, R32, R1234yf, R1234ze(E), and HFO1123.