The reason why the rechargeable hot water bottle becomes significantly larger when it is charged is because of the gas produced inside.

The rechargeable hot water bottle is filled with a certain amount of liquid, and a heating powder is added. Electricity accelerates the flow of water, stimulating the black powder to produce a chemical reaction and releasing heat. This is the working principle of the rechargeable hot water bottle. . Chemical reactions must produce products, and stable chemical reactions will generate precipitates and gases, so the rechargeable hot water bottle will bulge when it is charged.

The water inside the hot water bag is not ordinary domestic water, but water mixed with heating powder, which becomes a conductor of electricity. If the water in the bag is mixed with too much powder, the concentration will be high.

When electricity is applied, these excess impurities are electrolyzed to generate a large amount of gas, which causes the hot water bag to expand. Pour out the water inside the bag and then add an equal amount of pure water to dilute the water inside, so that the concentration of the internal solution reaches A predetermined value that will not produce a large amount of gas after power is supplied.

Extended information:

Precautions for the use of rechargeable hot water bottles:

1. When energizing and storing heat, do not place the hot water bottle on fiber fabrics and heat-resistant materials. items to prevent damage to the items during charging and heating.

2. The power supply device must be used in conjunction with it. Do not use other power cords to charge the water bag of this product.

3. After charging and heating, the power supply should be cut off in time; if people need to leave for a long time during the charging process, the power supply must be cut off.

4. In order to ensure safe use and avoid burns and accidents, do not stick to the hot water bottle when warming your hands or quilt.

5. It is strictly prohibited to use hot water bottles when the power is on.

6. Put the hot water bottle into the packaging box after cooling. If not used for a long time, it should be stored in a dry and cool place.

7. It is strictly prohibited to use this product for infants, young children, those with slow thermal sensation or those who cannot take care of themselves.