Heat source unit for refrigeration apparatus

Abstract

A heat source unit for a refrigeration apparatus, including: a casing; a heat exchanger disposed in an internal space of the casing, and that performs heat exchange between a refrigerant and air; a fan disposed in the internal space of the casing, and that horizontally blows out air passing through the heat exchanger; a first shut-off valve; and a second shut-off valve larger in diameter than the first shut-off valve; wherein the heat source unit further includes an above-shut-off-valves member disposed in the casing, positioned above the first shut-off valve and the second shut-off valve, and having at least one vertically penetrating wiring hole. The second shut-off valve is disposed below the first shut-off valve.

1 . A heat source unit for a refrigeration apparatus, comprising:
 a casing;   a heat exchanger disposed in an internal space of the casing and that performs heat exchange between a refrigerant and air;   a fan disposed in the internal space of the casing and that horizontally blows out air passing through the heat exchanger;   a first shut-off valve;   a second shut-off valve larger in diameter than the first shut-off valve; and   an above-shut-off-valves member disposed in the casing, positioned above the first shut-off valve and the second shut-off valve, and having at least one vertically penetrating wiring hole,   wherein the second shut-off valve is disposed below the first shut-off valve.   
     
     
         2 . The heat source unit for a refrigeration apparatus according to  claim 1 , wherein the first shut-off valve and the second shut-off valve are disposed in a range of ¾ or less of a distance from a bottom surface of the casing to the wiring hole. 
     
     
         3 . The heat source unit for a refrigeration apparatus according to  claim 1 , wherein the first shut-off valve and the wiring hole do not overlap in a plan view of the casing. 
     
     
         4 . The heat source unit for a refrigeration apparatus according to  claim 1 , wherein
 the wiring hole is disposed as one of a plurality of wiring holes of the above-shut-off-valves member; and   the first shut-off valve and at least one of the plurality of wiring holes do not overlap in a plan view of the casing.   
     
     
         5 . The heat source unit for a refrigeration apparatus according to  claim 1 , further comprising an electric component assembly disposed in the internal space of the casing and above the wiring hole. 
     
     
         6 . The heat source unit for a refrigeration apparatus according to  claim 1 , wherein the first shut-off valve and the second shut-off valve each have a connection port that opens toward a front-surface side or a back-surface side of the casing. 
     
     
         7 . The heat source unit for a refrigeration apparatus according to  claim 1 , wherein the above-shut-off-valves member partitions the internal space of the casing and a shut-off valve placement space in which the first shut-off valve and the second shut-off valve are disposed. 
     
     
         8 . The heat source unit for a refrigeration apparatus according to  claim 7 , wherein
 the casing has cut-out portions proximal to the first shut-off valve and the second shut-off valve; and   the cut-out portions of the casing face the shut-off valve placement space.   
     
     
         9 . The heat source unit for a refrigeration apparatus according to  claim 1 , wherein the first shut-off valve and the second shut-off valve are disposed not to protrude from a virtual cuboid defined by a top surface, bottom surface, front surface, back surface, left-side surface, and right-side surface of the casing.