Recommended models: TB24, TB25
 
Rainbow is the drafting unit of the national standards GB 4706.1-2005 and GB 4706.99-2009, which are the main production standards for electric heating water bags. In addition, Rainbow is also the drafting unit of the national standard for electric blankets, with an annual production capacity of 10 million beds and sales ranking first in the country for more than 20 consecutive years. Although Rainbow's electric heating water bag is not its main product, with many years of experience in the production of electric blankets related to it, Rainbow electric heating water bag has high safety and has no quality problems in many national sampling inspections.
 
Rainbow electric warm water bag is positioned in the mid-end market, the price is between 49~99 yuan, and the product is cost-effective. Its electric heating bags are mainly divided into two styles: electric heating pipe heating and electric heating wire heating, and they are also the two different types of mainstream electric heating bags on the market. Compared with the two, although the heating speed of the electric heating wire is not as good as that of the electric heating pipe, the heating is more uniform, and the price is generally more expensive than the electric heating pipe type warm water bag.
 
In principle, the electric heating pipe is mainly heated by the power supply, and the power supply does not directly contact the liquid in the warm water bag, but heats the liquid through the electric heating pipe, and the way of water and electricity isolation is relatively safe. Rainbow currently only has one electric heating tube warm water bag TB24, and the price is about 50 yuan. In addition, TB24 also adds a layer of glue injection heat-resistant shell to the electric heating pipe to prevent the heating pipe from directly contacting the bag body of the warm water bag, which is safer to use.
 
The price of the rainbow heating wire warm water bag is between 69~99 yuan, which is the main style of the brand. The material of the electric heating wire warm water bag is the same as that of the electric heating tube warm water bag, the main difference is the thickness and style of the coat. The heating core of the rainbow heating wire heating bottle is made of insulated heating wire, which is wrapped in two layers of high-temperature, corrosion-resistant silicone, which is slightly safer than the electric heating pipe heating bottle.
 
Rainbow's warm water bags are equipped with a thermostat, explosion-proof charging clip, and hot-melt fuse triple protection device. Among them, the thermostat and explosion-proof charging clamp are the standard protective devices for electric heating bladders on the market, and the fuse is only configured by some manufacturers. The thermostat will automatically power off when the temperature reaches 70°C, but when the thermostat fails, the role of the explosion-proof charging clamp is reflected, continuous heating will make the bag expand and squeeze the explosion-proof charging clamp, and the charging clip will automatically cut off after the angle becomes larger. In the unlikely event that the explosion-proof charging clamp also fails, the hot-melt fuse is the last line of protection, melting and cutting off the power supply when the temperature reaches 92°C.
 
In addition, the bag body of Rainbow is stitched together by 3 layers of PVC, and the thickness of each layer of PVC reaches 0.3mm, which is 0.05mm thicker than other ordinary brands, and the bag body is more compression-resistant.