Because the liquid in the electric heater is sodium acetate solution, not pure water, it is brown.
Currently, there are two types of electric heaters on the market, one is a solid electric heater cake, and the other is a soft liquid electric heater. Their working principle is as follows:
1. Solid electric heating cake, filled with thermal insulation cotton (such as; asbestos, etc.). It adopts a dual temperature control electric heating energy storage structure to gradually release heat energy. Built-in automatic overheating protection device and automatic heat preservation indicator device. This is a small electric stove controlled by a positive temperature coefficient thermistor switch. Positive temperature coefficient thermistor. Heat will be generated when current passes through it (the heat of the electric furnace will be conducted to it). When the temperature reaches a certain value, its resistance will increase sharply, which can be considered to be turned off, so the steel bar stops consuming electricity at this time. After that, the heat is slowly released through insulation. This kind of insulation can last a long time and someone should be present when it is heated. In order to prevent accidents, people should not leave, and the temperature is relatively high. When using, the hand warmer must be placed on the cloth bag to avoid burns. Electric heaters should be used on the bed, not fixed in one place, and are best moved at any time. If a person leaves the bed for a long time, take the electric heater out of the bed immediately.
2. The liquid electric heater is beautiful and practical, soft to the touch, and uses new technology to store energy and heat up quickly. One-time water filling, permanent use, unique explosion-proof and iron-free device, temperature control protection; long service life; long-term warmth keeping. The working principle is improved based on the solid electric heating cake. Adopting electrode heating method, it has high-quality temperature control and hot-melt dual temperature control insurance. Under normal circumstances, when the temperature of the liquid in the bag reaches 65 degrees, the temperature controller will automatically cut off the circuit and stop heating. However, if the thermostat cannot be controlled, the thermal fuse will cut off power and terminate heating, and a new product will need to be replaced, please do not attempt to repair it. The bag body is made of double-layer materials, and the organic sealing combination of advanced medical thickened plastic film and high-strength composite fiber inner liner greatly improves the strength, durability and durability of the electric heater.
In addition, special anti-leak technology ensures that there will be no liquid leakage during normal use. At the same time, a unique over-temperature automatic protection mechanical pressure protection device is designed, which is safe and convenient. It is best to choose products that have been added with water and tested before leaving the factory, such as products that add water by themselves. Remember to release the air from the bag to ensure personal safety.