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US 12,472,800 B2Granted
Refrigeration cycle device for vehicle
AssigneeDaikin Industries, Ltd.
InventorsIkuhiro Iwata, Eiji Kumakura, Tetsushi Tsuda, Shinjiro Domi
Life of this patent
Estimating the term…
Abstract
A refrigeration cycle device for a vehicle includes a refrigerant circuit, in which a zeotropic refrigerant mixture is circulated, including a utilization heat exchanger including a first heat exchange portion and a second heat exchange portion disposed in series with the first heat exchange portion in a direction in which the zeotropic refrigerant mixture flows in the refrigerant circuit. The first heat exchange portion is disposed on an upstream side of the second heat exchange portion in a direction in which the zeotropic refrigerant mixture flows when the utilization heat exchanger functions as an evaporator of the zeotropic refrigerant mixture.
Claims11
A refrigeration cycle device for a vehicle, comprising:
- a refrigerant circuit, in which a zeotropic refrigerant mixture is circulated, comprising a utilization heat exchanger including:
- a first heat exchange portion;
- and
- a second heat exchange portion disposed in series with the first heat exchange portion in a direction in which the zeotropic refrigerant mixture flows in the refrigerant circuit, wherein
- the first heat exchange portion is disposed on an upstream side of the second heat exchange portion in a direction in which the zeotropic refrigerant mixture flows when the utilization heat exchanger functions as an evaporator of the zeotropic refrigerant mixture, and
- when the utilization heat exchanger functions as the evaporator, an evaporation temperature of the zeotropic refrigerant mixture in the first heat exchange portion is lower than an evaporation temperature of the zeotropic refrigerant mixture in the second heat exchange portion.
3 more elements
A refrigeration cycle device for a vehicle, comprising:
- a refrigerant circuit, in which a zeotropic refrigerant mixture is circulated, comprising a utilization heat exchanger including:
- a first heat exchange portion;
- and
- a second heat exchange portion disposed in series with the first heat exchange portion in a direction in which the zeotropic refrigerant mixture flows in the refrigerant circuit, wherein
- the first heat exchange portion is disposed on an upstream side of the second heat exchange portion in a direction in which the zeotropic refrigerant mixture flows when the utilization heat exchanger functions as an evaporator of the zeotropic refrigerant mixture, and
- one of the first and second heat exchange portions that has the larger heat load to be treated is disposed on an upstream side of a flow of the zeotropic refrigerant mixture.
3 more elements
A refrigeration cycle device for a vehicle comprising:
- a refrigerant circuit, in which a zeotropic refrigerant mixture is circulated, comprising a utilization heat exchanger including:
- a first heat exchange portion;
- a second heat exchange portion;
- and
- a switch that switches the refrigerant circuit between a first state and a second state, wherein
- in the first state, the first heat exchange portion is disposed on an upstream side of the second heat exchange portion in a flow of the zeotropic refrigerant mixture,
- in the second state, the second heat exchange portion is disposed on an upstream side of the first heat exchange portion in a flow of the zeotropic refrigerant mixture, and
- the switch switches into the first state when the utilization heat exchanger functions as an evaporator of the zeotropic refrigerant mixture and is controlled such that an evaporation temperature of the zeotropic refrigerant mixture in the first heat exchange portion is lower than an evaporation temperature of the zeotropic refrigerant mixture in the second heat exchange portion.
5 more elements
A refrigeration cycle device for a vehicle comprising:
- a refrigerant circuit, in which a zeotropic refrigerant mixture is circulated, comprising a utilization heat exchanger including:
- a first heat exchange portion;
- a second heat exchange portion;
- and
- a switch that switches the refrigerant circuit between a first state and a second state, wherein
- in the first state, the first heat exchange portion is disposed on an upstream side of the second heat exchange portion in a flow of the zeotropic refrigerant mixture,
- in the second state, the second heat exchange portion is disposed on an upstream side of the first heat exchange portion in a flow of the zeotropic refrigerant mixture, and
- the switch switches into the first state when the utilization heat exchanger functions as a condenser of the zeotropic refrigerant mixture and is controlled such that a condensation temperature of the zeotropic refrigerant mixture in the first heat exchange portion is higher than a condensation temperature of the zeotropic refrigerant mixture in the second heat exchange portion.
5 more elements
A refrigeration cycle device for a vehicle, comprising:
- a refrigerant circuit, in which a zeotropic refrigerant mixture is circulated, comprising a utilization heat exchanger including:
- a first heat exchange portion;
- and
- a second heat exchange portion disposed in series with the first heat exchange portion in a direction in which the zeotropic refrigerant mixture flows in the refrigerant circuit, wherein
- the first heat exchange portion is disposed on an upstream side of the second heat exchange portion in a direction in which the zeotropic refrigerant mixture flows when the utilization heat exchanger functions as an evaporator of the zeotropic refrigerant mixture,
- one of the first and second heat exchange portions is used for air-conditioning inside of the vehicle, and
- the other of the first and second heat exchange portions is used for adjusting a temperature of a battery.
4 more elements
A refrigeration cycle device for a vehicle, comprising:
- a refrigerant circuit, in which a zeotropic refrigerant mixture is circulated, comprising a utilization heat exchanger including:
- a first heat exchange portion;
- and
- a second heat exchange portion disposed in series with the first heat exchange portion in a direction in which the zeotropic refrigerant mixture flows in the refrigerant circuit, wherein
- the first heat exchange portion is disposed on an upstream side of the second heat exchange portion in a direction in which the zeotropic refrigerant mixture flows when the utilization heat exchanger functions as an evaporator of the zeotropic refrigerant mixture,
- one of the first and second heat exchange portions is used for air-conditioning a front seat inside a vehicle, and
- the other of the first and second heat exchange portions is used for air-conditioning a rear seat inside the vehicle.
4 more elements
A refrigeration cycle device for a vehicle, comprising:
- a refrigerant circuit, in which a zeotropic refrigerant mixture is circulated, comprising a utilization heat exchanger including:
- a first heat exchange portion;
- and
- a second heat exchange portion disposed in series with the first heat exchange portion in a direction in which the zeotropic refrigerant mixture flows in the refrigerant circuit, wherein
- the first heat exchange portion is disposed on an upstream side of the second heat exchange portion in a direction in which the zeotropic refrigerant mixture flows when the utilization heat exchanger functions as an evaporator of the zeotropic refrigerant mixture, and
- the zeotropic refrigerant mixture includes HFO (hydrofluoroolefin) 1132.
3 more elements
Dependencies are inferred from the claim text.