Warm hand treasure is an automatic heating and health care product developed by using physical and chemical principles. With its unique advantages of automatic heating, interesting, practical, etc., the product is very popular.
Warm hand treasure can be roughly divided into three types: one is heated by heating water, which is commonly known as the hot water bag. Different from the traditional hot water bag, the electric water bag saves the trouble of adding water. As long as you plug in the power supply and wait for 10 minutes, you can get hot. In fact, you boil the water inside, so the temperature will be very high. One is to generate heat through chemical reaction. This is the type of warm hand treasure on the market. Through the contact of chemical substances inside, the heat generated is about 40 ℃. The other is to use the lithium battery function. The internal heater is heated, and the USB interface is used for charging and discharging. It is similar to the hand warming mouse pad. Due to the charging and discharging function of the lithium battery, it can also be used as a mobile power supply. Small size, easy to carry, the temperature can reach about 50 ℃.
One advantage of warm handbags is that they can be recycled. As long as the bag is heated in boiling water for about 10 minutes, the condensed solute will dissolve again; this is because the solubility of solute increases when the temperature is raised. In the process of dissolution, the solute undergoes endothermic reaction and becomes supersaturated solution again.
