A refrigeration apparatus (air conditioner (1A)) includes: a vapor channel (2A) that directs a refrigerant vapor from an evaporator (25) to a condenser (23); a liquid channel (2B) that directs a refrigerant liquid from the condenser (23) to the evaporator (25); a first circulation path (4) that allo
A refrigeration apparatus (air conditioner (1A)) includes: a vapor channel (2A) that directs a refrigerant vapor from an evaporator (25) to a condenser (23); a liquid channel (2B) that directs a refrigerant liquid from the condenser (23) to the evaporator (25); a first circulation path (4) that allows the refrigerant liquid retained in the evaporator (25) to circulate via a first heat exchanger (indoor heat exchanger (31)); and a second circulation path (5) that allows the refrigerant liquid retained in the condenser (23) to circulate via a second heat exchanger (outdoor heat exchanger (33)). A first switching means and a second switching means are provided on the first circulation path (4) and the second circulation path (5). The first switching means and the second switching means are, for example, four-way valves 61 and 62.
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1. A refrigeration apparatus comprising: an evaporator that retains a refrigerant liquid and that evaporates the refrigerant liquid therein;a condenser that condenses a refrigerant vapor therein and that retains the refrigerant liquid;a vapor channel that directs the refrigerant vapor from the evapo
1. A refrigeration apparatus comprising: an evaporator that retains a refrigerant liquid and that evaporates the refrigerant liquid therein;a condenser that condenses a refrigerant vapor therein and that retains the refrigerant liquid;a vapor channel that directs the refrigerant vapor from the evaporator to the condenser and that is provided with a compressor;a liquid channel that directs the refrigerant liquid from the condenser to the evaporator;a first circulation path that allows the refrigerant liquid retained in the evaporator to circulate via a first heat exchanger and that is provided with a first pump at a position upstream from the first heat exchanger;a second circulation path that allows the refrigerant liquid retained in the condenser to circulate via a second heat exchanger and that is provided with a second pump at a position upstream from the second heat exchanger;a first four-way valve that is provided on the first circulation path and the second circulation path and that is switched between a first state and a second state, the first state being a state in which the refrigerant liquid pumped from the first pump is directed to the first heat exchanger and the refrigerant liquid pumped from the second pump is directed to the second heat exchanger, and the second state being a state in which the refrigerant liquid pumped from the first pump is directed to the second heat exchanger and the refrigerant liquid pumped from the second pump is directed to the first heat exchanger; anda second four-way valve that is provided on the first circulation path and the second circulation path and that is switched between a first state and a second state, the first state being a state in which the refrigerant liquid flowing from the first heat exchanger is directed to the evaporator and the refrigerant liquid flowing from the second heat exchanger is directed to the condenser, and the second state being a state in which the refrigerant liquid flowing from the first heat exchanger is directed to the condenser and the refrigerant liquid flowing from the second heat exchanger is directed to the evaporator, whereinthe first circulation path includes: a first flow path connecting the evaporator and an inlet of the first four-way valve; a second flow path connecting an outlet of the first four-way valve and an inlet of the first heat exchanger; a third flow path connecting an outlet of the first heat exchanger and an inlet of the second four-way valve; and a fourth flow path connecting an outlet of the second four-way valve and the evaporator,the second circulation path includes: a first flow path connecting the condenser and another inlet of the first four-way valve; a second flow path connecting another outlet of the second four-way valve and an inlet of the second heat exchanger; a third flow path connecting an outlet of the second heat exchanger and another inlet of the second four-way valve; and a fourth flow path connecting another outlet of the second four-way valve and the condenser,when the first four-way valve is in the first state and the second four-way valve is in the first state, (i) the refrigerant liquid retained in the evaporator flows through the first flow path of the first circulation path, the first four-way valve, the second flow path of the first circulation path, the first heat exchanger, the third flow path of the first circulation path, the second four-way valve, and the fourth flow path of the first circulation path in this order, and (ii) the refrigerant liquid retained in the condenser flows through the first flow path of the second circulation path, the first four-way valve, the second flow path of the second circulation path, the second heat exchanger, the third flow path of the second circulation path, the second four-way valve, and the fourth flow path of the second circulation path in this order, andwhen the first four-way valve is in the second state and the second four-way valve is in the second state, (iii) the refrigerant liquid retained in the evaporator flows through the first flow path of the first circulation path, the first four-way valve, the second flow path of the second circulation path, the second heat exchanger, the third flow path of the second circulation path, the second four-way valve, and the fourth flow path of the first circulation path in this order, and (iv) the refrigerant liquid retained in the condenser flows through the first flow path of the second circulation path, the first four-way valve, the second flow path of the first circulation path, the first heat exchanger, the third flow path of the first circulation path, the second four-way valve, and the fourth flow path of the second circulation path in this order. 2. The refrigeration apparatus according to claim 1, wherein the compressor includes: a first compressor that compresses the refrigerant vapor that has flowed from the evaporator; and a second compressor that further compresses the refrigerant vapor that has been compressed by the first compressor,the vapor channel is provided with an intercooler that cools the refrigerant vapor between the first compressor and the second compressor,the refrigeration apparatus further comprises a vapor cooling channel that is branched from the second circulation path and is connected to the intercooler, andthe intercooler is configured to cool the refrigerant vapor by mixing the refrigerant liquid supplied from the vapor cooling channel with the refrigerant vapor or by exchanging heat between the refrigerant vapor and the refrigerant liquid. 3. The refrigeration apparatus according to claim 2, wherein the vapor cooling channel is branched from the second circulation path at a position downstream from the second four-way valve, andthe vapor cooling channel is provided with a flow rate regulating mechanism. 4. The refrigeration apparatus according to claim 2, further comprising: a bearing cooling channel that withdraws the refrigerant vapor cooled by the intercooler from the intercooler or the vapor channel and that feeds the withdrawn refrigerant vapor to bearing portions of the first compressor and the second compressor; anda recovery channel that returns the refrigerant vapor from the bearing portions of the first compressor and the second compressor to the evaporator. 5. The refrigeration apparatus according to claim 1, wherein a height from a suction port of the first pump to a level of the refrigerant liquid retained in the evaporator is 200 mm or more, anda height from a suction port of the second pump to a level of the refrigerant liquid retained in the condenser is 200 mm or more.
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이 특허에 인용된 특허 (2)
Cook F. Bert (Columbus OH) Petty Stephen E. (Dublin OH) Meacham ; Jr. Howard C. (Upper Arlington OH) Christensen Richard N. (Columbus OH) McGahey Kevin R. (Hilliard OH), Heat transfer apparatus for heat pumps.
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