When it comes to factors affecting heat distribution in a retort, there are several key factors to consider. First of all, the design and structure inside the retort is crucial to heat distribution. Secondly, there is the issue of the sterilization method used. Using the right sterilization method can avoid cold spots and increase the uniformity of heat distribution. Finally, the nature of the material inside the retort and the shape of the content will also have an impact on the heat distribution.

First of all, the design and structure of the retort determines the uniformity of heat distribution. For example, if the internal design of the retort can effectively help the heat to be evenly distributed throughout the container, and make targeted measures for the location of possible cold spots, then the heat distribution will be more uniform. Therefore, the rationality of the internal structure of the retort plays a key role in heat distribution.

Second, the sterilization method has an important impact on heat distribution. For example, for the sterilization of vacuum-packed large meat products using water immersion sterilization, the product is all immersed in the hot water, heat distribution effect is good, heat penetration ability, while the use of the wrong sterilization method may lead to the product surface temperature is high, the center temperature is low, the sterilization effect is not uniform and other issues. Therefore, it is crucial to choose a suitable sterilization method to improve the uniform distribution of heat.

Finally, the nature of the material and the shape of the content inside the sterilizer can also affect the uniformity of heat distribution. For example, the shape and placement of the material can affect the uniformity of heat transfer, which in turn affects the temperature distribution inside the entire pressure vessel.

In summary, the reasons affecting the heat distribution of the retort mainly include the design and structure, the sterilization method and the nature of the internal materials and the shape of the content. In practical application, these factors should be fully considered, and take corresponding measures to improve the uniform distribution of heat in the retort to ensure the sterilization effect and quality of the product.