FIELD: refrigerating equipment.
SUBSTANCE: invention relates to compressor building and is intended for use in cooling devices. Piston compressor 100 for cooling device 200 is equipped with closed circuit C, having main branch M, in which first flow X of circulating coolant enters compressor. It contains at least one first branch of economiser or secondary branch E, in which the second coolant flow X1 circulates under pressure, which differs from pressure of first flow X of cooling agent. Compressor is equipped with cylinder 110 and one piston 111 reciprocating in cylinder between upper dead point S and lower dead point I. It comprises one suction channel for input of first coolant flow and opening 107 made in cylinder wall to feed second flow of coolant so that piston opens partially at least one first inlet hole 107 during its intake stroke and closes one hole during its compression stroke. One first inlet hole 107 has the shape of a slot with a main dimension substantially transverse to axis A of the cylinder. It comprises additional second hole 112 made in cylinder wall to feed additional flow of coolant X2. It also has the shape of a slot and is located at a distance D from the lower dead point, which is greater than the distance d, on which the first hole is located, for opening by the piston of the second inlet hole 112 during the inlet stroke and closing of the second hole during the compression stroke.
EFFECT: has smaller working volume at the same operating characteristics as other cooling devices.
8 cl, 10 dwg
