| 摘要 |
1. Apparatus for cooling milk, comprising a pump (12) for sending the milk coming from milking into a heat exchanger (18) where the milk is cooled by cold water before being stored in a refrigerated tank (22) characterised by the fact that it comprises a non-return valve (106) on the pipe (16) supplying milk to the heat exchanger (18), that this heat exchanger is a tubular exchanger comprising an inner stainless steel tube (24), arranged in a coil and intended for the circulation of the milk and an outer tube (26) of flexible plastics material, arranged around the inner tube and intended for the circulation of cold water in the space comprised between the two tubes, the milk circulating from the top towards the bottom of the exchanger, that the milk coming from milking is first of all collected in a transfer vessel (10) arranged upstream of the milk pump (12) and the volume of milk in the tubular exchanger (18) corresponds substantially to the volume of milk in the transfer vessel (10), that the pipe (20) for the discharge of milk from the exchanger (18) to the refrigerated tank (22) is a downpipe intended to supply the cooled milk taken from the bottom of the exchanger (18) directly by gravity to the refrigerated tank (22) and that it also comprises an air intake (78) mounted on the milk supply pipe (16) and at the top of the exchanger, the said air intake being able to be kept either in the closed position for the cooling of the milk, or in the open position for the emptying of the exchanger, at the end of milking and at the end of washing as well as control means (42, 44, 48) able to control the operation of the milk pump intermittently and, during the stoppage of the milk pump (12) and the momentary stagnation of the milk in the exchanger (18) due to the presence of the non-return valve (106) on the supply pipe (16), at least one injection of cold water in an upwards direction into the exchanger. |
