Abstract: A chiller unit, which is a heat source unit, includes devices, such as a compressor and an electric component box in a machine chamber in a lower portion thereof, and a heat exchanger in an air passage in an upper portion thereof. A drain pan is disposed under the heat exchanger, and a drain gutter is disposed under the outflow port of the drain pan. The drain gutter includes a main drain port at its end portion where the depth of the drain gutter is deepest, and a secondary drain port at its end portion where the depth of the drain gutter is shallowest. The drain gutter has a guide portion, the end of which protrudes to the outside of the casing.

Abstract: A chiller unit, which is a heat source unit, includes devices, such as a compressor and an electric component box in a machine chamber in a lower portion thereof, and a heat exchanger in an air passage in an upper portion thereof. A drain pan is disposed under the heat exchanger, and a drain gutter is disposed under the outflow port of the drain pan. The drain gutter includes a main drain port at its end portion where the depth of the drain gutter is deepest, and a secondary drain port at its end portion where the depth of the drain gutter is shallowest. The drain gutter has a guide portion, the end of which protrudes to the outside of the casing.

Abstract: A refrigeration apparatus includes a compressor, first and second heat exchangers, first and second electric valves, a passage-switching valve, a supercooling heat exchanger, and a controller. The first and second valves are disposed in first and second refrigerant passages. The supercooling heat exchanger conducts heat exchange between refrigerant flowing through the first and second refrigerant passages. The controller transitions to a defrosting operation mode upon determining that frost has formed on the second heat exchanger during a heating operation mode. The controller executes a defrosting preparatory control and a defrosting control after the defrosting preparatory control during the defrosting operation mode. The controller switches the passage-switching valve during the defrosting control. The controller narrows the opening degree of the first electric valve and controls the opening degree of the second electric valve to a minimum opening degree during the defrosting preparatory control.

Abstract: A refrigeration apparatus includes a compressor, first and second heat exchangers, first and second electric valves, a passage-switching valve, a supercooling heat exchanger, and a controller. The first and second valves are disposed in first and second refrigerant passages. The supercooling heat exchanger conducts heat exchange between refrigerant flowing through the first and second refrigerant passages. The controller transitions to a defrosting operation mode upon determining that frost has formed on the second heat exchanger during a heating operation mode. The controller executes a defrosting preparatory control and a defrosting control after the defrosting preparatory control during the defrosting operation mode. The controller switches the passage-switching valve during the defrosting control. The controller narrows the opening degree of the first electric valve and controls the opening degree of the second electric valve to a minimum opening degree during the defrosting preparatory control.

Abstract: In an HDD actuator pivot bearing unit 10, an axial inner surface 22a of a shield cap 22 is formed into a stepped shape so that an axial minimum gap a1 with a shield member 14e of one bearing 14 is narrower than an axial minimum gap a2 with an outer ring 14b and so that an axial minimum gap a3 with a boundary position 14b3 between an axial end face of the outer ring 14 and an annular groove 14b1 is narrower than the axial minimum gap a2 with the outer ring 14. By doing so, the amount of air passing through an interior of the bearing can be reduced to thereby reduce outparticles.

Abstract: In an HDD actuator pivot bearing unit 10, an axial inner surface 22a of a shield cap 22 is formed into a stepped shape so that an axial minimum gap a1 with a shield member 14e of one bearing 14 is narrower than an axial minimum gap a2 with an outer ring 14b and so that an axial minimum gap a3 with a boundary position 14b3 between an axial end face of the outer ring 14 and an annular groove 14b1 is narrower than the axial minimum gap a2 with the outer ring 14. By doing so, the amount of air passing through an interior of the bearing can be reduced to thereby reduce outparticles.

Abstract: There is provided a roller bearing for a hard disk swing arm, which is configured to improve the response characteristics of the swing arm by reducing a change in torque hysteresis of a swing arm retaining force with respect to time passage in a HDD drive state. The roller bearing (14, 16) is configured to swing and rotatably support the swing arm provided in a hard disk drive. The roller bearing (14, 16) includes: an inner ring (14a, 16a); an outer ring (14b, 16b); a plurality of rolling elements (14c, 16c) disposed between the inner ring (14a, 16a) and the outer ring (14b, 16b); and a retainer (14d, 16d) that retains the plurality of rolling elements (14c, 16c). The inner ring (14a, 16a) and the outer ring (14b, 16b) have a surface hardness of 700 HV or more and less than 800 HV, and each of the rolling elements has a surface hardness of 945 HV or more and less than 1060 HV.