The length of time a capillary will be in a 300L freezer depends on the specific circumstances and requirements. If you are referring to a capillary tube used in a refrigeration or cooling system, such as in a freezer, it would typically be permanently installed and remain inside the freezer for the entire lifespan of the appliance.
The capillary tube is an integral part of the cooling system, responsible for regulating the flow of refrigerant and assisting in the cooling process. It is usually located within the walls or components of the freezer, connecting the evaporator coil to the condenser coil. The capillary tube does not typically require regular removal or replacement unless it becomes damaged or malfunctions.
However, if you are referring to a capillary tube that is separate from the freezer and is placed inside it temporarily, for example, for a specific experimental setup or research purposes, the duration of its presence would depend on the purpose and requirements of the experiment. In such cases, the capillary tube would be placed inside the freezer for the desired duration needed to achieve the experimental objectives, and then it would be removed afterward.
It's important to note that specific requirements may vary depending on the intended use and design of the freezer, so it's always advisable to refer to the manufacturer's guidelines and recommendations for your particular model.