into channels formed by the grooves 61 62 63 64 65 leading to the connector fittings 12 the lengths of the grooves 61 to 65 differ with the groove 63 being the shortest and the grooves 61 and 65 being the longest by virtue of the central layout of the distributor and baffle piece 60 of the venturi distributor the grooves 61 to 65 may be made substantially shorter with the grooves being only half as long as heretofore shown in fig4 to insure that the ends of the grooves 61 to 65 always coincide with the orifices of the connector fittings 12 means to prevent rotation are provided they consist of a key 57 engaging corresponding recesses in the distributor housing 48 and the part 58 a rubber ring 70 is provided for sealing against the atmosphere fig8 shows the body 50 consisting of the parts 58 and 59 in a perspective view broken lines indicate the location of the grooves 61 to 65 within the body 50 as seen in the figure the grooves 61 to 65 are arranged in the parting plane of the body 50 with the part 58 and are covered by the part 59 thereby forming the channels to conduct the coolant fig9 shows a distributor box 7 with the body 50 and the venturi distributor 9 the distributor box 48 has a connector fitting 12 pointing downwardly upon which an evaporator pipe 5 is placed and secured by means of a pressure ring 68 an orifice 92 is located in the.