Cleaning method for sterilization line and sterilization line

A sterilization line comprising:

• a connecting conduit through which a product liquid is transferred;
• one or more stages of heating parts that are provided in a middle section of the connecting conduit and sterilize the product liquid;
• and one or more stages of cooling parts that cool the product liquid from the one or more stages of the heating parts in a stepwise manner,
• wherein the sterilization line further comprises a plurality of parallel intermediate piping systems in a section thereof from the one or more stage of the heating parts that lies in a temperature range in which the product liquid can be burned to the one or more stages of the cooling parts that lies in the temperature range in which the product liquid can be burned,
• wherein the section includes at least one of the one or more stages of the heating part that lies in the temperature range in which the product liquid can be burned, the plurality of parallel intermediate piping systems being provided with a cleaning in place (CIP) unit that cleans the plurality of parallel intermediate piping systems, and a sterilization process for the product liquid in the plurality of parallel intermediate piping system and CIP of the plurality of parallel intermediate piping system is performed by switching between the plurality of parallel intermediate piping systems,
• where a swing bend is provided to achieve switching between a flow path of the product liquid and a flow path of a cleaning solution used for the CIP upstream of the plurality of intermediate parallel piping systems and switching between the flow path of the product liquid and the flow path of the cleaning solution used for the CIP downstream of the plurality of parallel intermediate piping systems, and
• wherein the swing bend is provided in a shielded chamber, and the sterilization line is provided with a sterilization unit that sterilizes an interior of the shielded chamber before the switching between the flow paths, the sterilization unit being provided with a steam inlet and a steam outlet.