Abstract: 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.

Abstract: A heat exchange apparatus (300) includes a first heat exchanger (14), an ejector (11), a first extractor (12), a first pump (13), and a liquid path (15). The ejector (11) produces a merged refrigerant flow using a refrigerant vapor and a refrigerant liquid flowing from the first heat exchanger (14). The first extractor (12) receives the merged refrigerant flow from the ejector (11), and extracts the refrigerant liquid from the merged refrigerant flow. The first pump (13) is provided in the liquid path (15). The refrigerant liquid is pumped by the first pump (13) from the first extractor (12) to the ejector (11).

Abstract: The disclosed refrigeration-cycle equipment comprises a main circuit and an evaporation-side circulation circuit. The main circuit includes i) a compressor that compresses refrigerant vapor, ii) a condensation mechanism that condenses the refrigerant vapor, and iii) an evaporative mechanism that stores refrigerant liquid and that evaporates the refrigerant liquid. The evaporation-side circulation circuit includes a heat exchanger for heat absorption and a decompression mechanism. The refrigerant returns to the evaporative mechanism after the refrigerant absorbing heat in the heat exchanger for heat absorption and the pressure of the refrigerant being reduced in the decompression mechanism. The refrigeration-cycle equipment further has an interaction mechanism that prevents droplets contained in the refrigerant having returned from the evaporation-side circulation circuit to the evaporative mechanism from being fed into the compressor.

Abstract: There is provided refrigeration-cycle equipment in which a mixture of a refrigerant component and an additive is employed as a refrigerant. The refrigeration-cycle equipment includes an evaporator, a condenser, a vapor passage, and a return passage. The return passage guides refrigerant liquid from the condenser to the evaporator. The return, passage is provided with a separating mechanism that separates the additive from the refrigerant component.

Abstract: A hydraulic control device is equipped with an oil jet that injects oil to a piston, an oil gallery through which oil injected by the oil jet and oil supplied to a lubrication part of an engine pass, an oil pump that pumps oil to the oil gallery, and a switching valve that is provided on an oil jet passage connecting the oil gallery and the oil jet together and leads oil supplied from the oil gallery to either the oil jet or an oil pan disposed at an upstream side of the oil pump. An ECU controls the switching valve on the basis of an engine speed and an engine cooling water temperature.

Abstract: 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.

Abstract: A refrigeration cycle apparatus (1A) includes: an evaporator (23) that retains a refrigerant liquid and that evaporates the refrigerant liquid therein; a condenser (22) that condenses a refrigerant vapor therein and that retains the refrigerant liquid; a vapor channel (2A) that is provided with a compressor (21) and that directs the refrigerant vapor from the evaporator (23) to the condenser (22); a liquid channel (2B) that directs the refrigerant liquid from the condenser (22) to the evaporator (23); a condensation-side circulation path (4) that allows the refrigerant liquid retained in the condenser (22) to circulate via a heat exchanger for heat release (41) and that is provided with a condensation-side pump (45) at a position upstream of the heat exchanger for heat release (41); and a back-flow path (7) that directs a portion of the refrigerant liquid flowing in a section downstream of the heat exchanger for heat release (41) in the condensation-side circulation path (4) to a section upstream of the conde

Abstract: A pump device (1A) includes: an impeller (2) that rotates about an axis of rotation (A); an inlet passage (10a) that extends along the axis of rotation (A) of the impeller (2); a volute chamber (10b) provided around the impeller (2); a high-pressure chamber (4) provided around the inlet passage (10a); a circumferential wall (5) that separates the inlet passage (10a) and the high-pressure chamber (4); and a bypass passage (6) that communicates the volute chamber (10b) and the high-pressure chamber (4). The circumferential wall (5) has a plurality of through holes (51) provided in a circumferential direction. The central axis (B) of each of the through holes (51) is included in a plane substantially perpendicular to the axis of rotation (A). The central axis (B) is inclined with respect to a reference line (L).

Abstract: A refrigeration cycle apparatus (1A) includes: a main circuit (2) composed of an evaporator (25), a first compressor (21), an intercooler (8), a second compressor (22), and a condenser (23) which are connected in this order; and an evaporation-side circulation path (5) that allows a refrigerant liquid retained in the evaporator (25) to circulate via a heat exchanger for heat absorption (6). The intercooler (8) is a heat exchanger that allows a refrigerant vapor compressed by the first compressor (21) to be cooled by the refrigerant liquid. A supply path (71) supplies, to the intercooler (8), a portion of the refrigerant liquid flowing in the first circulation path (5), and a recovery path (73) recovers the refrigerant liquid from the intercooler (8) to the evaporator (25).

Abstract: An air conditioner (1A) as a refrigeration apparatus includes: a refrigerant circuit (2) including an evaporator (25), a first compressor (21), a vapor cooler (3), a second compressor (22), and a condenser (23) that are connected in this order; a heat release circuit (4) that allows a heat medium to circulate between the condenser (23) and a first heat exchanger (5) that releases heat to the atmosphere; and a heat absorption circuit (6) that allows a heat medium to circulate between the evaporator (25) and a second heat exchanger (7). The vapor cooler (3) is a heat exchanger that exchanges heat between a refrigerant vapor compressed by the first compressor (21) and the heat medium flowing in the heat release circuit (4) or the heat medium flowing in the heat absorption circuit (6).

Abstract: A hydraulic control device is equipped with an oil jet that injects oil to a piston, an oil gallery through which oil injected by the oil jet and oil supplied to a lubrication part of an engine pass, an oil pump that pumps oil to the oil gallery, and a switching valve that is provided on an oil jet passage connecting the oil gallery and the oil jet together and leads oil supplied from the oil gallery to either the oil jet or an oil pan disposed at an upstream side of the oil pump. An ECU controls the switching valve on the basis of an engine speed and an engine cooling water temperature.