How long can the heat preservation effect of the simmering pot last?

The insulation duration of a thermal cooker can vary depending on several factors, including the quality of the product, the material used, and the environmental conditions. Here are some general guidelines based on the information available:

1. Material and Quality
High-Quality Stainless Steel: Thermal cookers made from high-quality stainless steel, such as 316 or 304, tend to have better insulation properties. For example, the Thermos King series thermal cooker, which is made of stainless steel, can keep food hot for up to 9 hours and cold for up to 12 hours.

2. Capacity and Design
Larger Capacity: Generally, thermal cookers with larger capacities tend to have longer insulation times. For instance, a 710ml thermal cooker from the Thermos King series can keep food hot for 9 hours, while a smaller 470ml version may have a slightly shorter insulation time.

3. Usage and Preheating
Preheating: Preheating the thermal cooker with hot water before adding food can significantly improve the insulation effect. This step is crucial for maintaining the temperature inside the cooker.
Food Type: The type of food also affects the insulation duration. For example, liquids like soups and porridge tend to stay hot longer than solid foods.

4. Environmental Conditions
Temperature: The ambient temperature can impact the insulation performance. In colder environments, the insulation duration may be shorter compared to warmer conditions.

5. Specific Examples
Thermos SK-3020: According to user tests, this model can maintain a temperature of 67°C or above after 6 hours and 36°C or above after 24 hours in a 20°C environment.
Thermos King Series: This series is known for its excellent insulation performance, with some models capable of keeping food hot for up to 14 hours and cold for up to 24 hours.

In summary, the insulation duration of a thermal cooker can range from 6 to 24 hours depending on the factors mentioned above. For the best results, choose a high-quality product, preheat it before use, and consider the type of food and environmental conditions.