Industry News
What to look for when buying an electric hot water bottle?
Every year in the cold season, in areas without heating, some friends turn on the air conditioner to keep warm, and some keep warm by wearing thermal underwear. There are various ways to keep warm，among various heating equipment, electric hot water bottles are the most popular, it is relatively cost-effective. It can keep you warm for several hours after charging for a few minutes. It does bring comfortable warmth when it is cold. However,in order to buy a high quality electric hot water bottle, What to look for when buying a hot water bottle?
1. Look at the heating wire structure type
There are three common types of hot water bottles on the market: electrode type, electric heating wire type, and electric heating tube type. You must not buy the electrode type, but you can buy the electric heating wire type and the electric heating tube type.
In order to prevent the liquid from being liquefied if the temperature is too high, there is a temperature control system inside the hot water bottle. When the temperature reaches about 70 degrees Celsius during charging, the temperature control system will automatically disconnect the power supply to ensure safety, this is the most basic configuration of every hot water bottle. The electrode-type hot water bottle thermostat is very easy to be damaged, so its safety is not guaranteed. In order to let everyone see the internal structure of the electrode-type hot water bottle clearly, we cut it open. We can see the two positive and negative heating elements, the structure is very simple. When this kind of hot water bottle is heated, current enters the solution through the electrodes, increasing the temperature of the liquid through a chemical reaction, thus increasing the overall temperature of the hot water bottle. This kind of electric hot water bottle is very dangerous during use，its metal electrode is in direct contact with the liquid. When the liquid in the hot water bottle is energized, an electrolysis reaction will occur in the water inside, releasing oxygen and hydrogen. When the two small iron nails on the electrode come into contact with oxygen and hydrogen, the iron nails will undergo an oxidation reaction and generate rust. As the electric hot water bottle is used more often, the rust will continue to accumulate. The thermostat itself is relatively sensitive, If it is placed inrusty water for a long time, the thermostat will be damaged. In the process of damage, the thermostat will continue to heat during the electric heating process. This will cause the expansion of our hot water bottle and the risk of explosion, just like the brakes of a car，If its brakes fail, the car may lose control. Here we can see that the heating device is constantly heating up without a thermostat. The water has boiled and there is a burning smell. It is very dangerous! However, Electric heating wire and electric heating tube hot water bottles separate water and electricity during heating. After being used many times, the liquid poured out is very clear, not easy to expand or explode, and is relatively safe.
How can we avoid buying electrode-type electric hot water bottles?
If you are shopping online, you can check the product details page, which will indicate the heating structure. Or you can ask customer service directly what the heating structure is. If you didn’t pay attention before buying it, review it carefully after you buy it and return it or buy a new one!
If you are buying offline, you can pinch the charging port. If there is a large bulge or obvious square structure inside the charging port, it is an electric heating tube type or electric heating wire type electric hot water bag, you can use it with confidence. If you can only feel a small bump, it is an electrode-type hot water bottle and needs to be replaced as soon as possible.
2.Look at the charger type
If we encounter such a plug, it is most likely an electrode type hot water bottle. We bought hot water bag with like this charger and cut it open. We can see that this electric hot water bottle is of electrode type. We should buy hot water bottles with smart power-off charging clips. such as those with explosion-proof clips, so that if the hot water bottle becomes inflated, the hot water bottle can intelligently cut off the power to avoid danger. select an explosion-proof clamp one tip here, If you open the charging head hear a sound, it means that it will automatically cut off the power when it expands. If there is no sound, it means there is no micro switch inside. In this way, even if the hot water bottle expands, the power will not be cut off. It would be better if there is a tilt-off function or a digital display, they can intelligently cut off power and ensure safety.
3. Look at thermal storage performance
In addition to safety performance, we also need to pay attention to the heat storage performance of electric hot water bottles. We bought several different electric hot water bottles from different places on the market and conducted heating tests. We can see that the current electric hot water bottles are all 26 degrees Celsius. First, we heated all the hot water bottles to their highest temperature, then we unplugged the power and actually counted the temperature of each hot water bottle every 15 minutes. We recorded the temperature drop of each hot water bottle for an hour. Some have a larger temperature drop within an hour, while others have good warmth retention properties. Therefore, There are big differences in the heat storage performance of electric hot water bottles. Generally speaking，we can choose those electric hot water bottles wrapped with multiple layers of high-quality PVC and use them with warm gloves to extend the heat storage performance of the electric hot water bottle.
4. Look at the pressure resistance performance
We usually are more casual in our own homes, especially when we are tired, we often find a place to sit down casually. If we accidentally sit on a hot water bottle, a hot water bottle with poor compression resistance may be damaged. If the water inside is still very hot, it can easily cause burns. According to the principles of physics, the speed at which we fall is about 4.5m/s, and the center of gravity of an adult is generally above 1 meter. If calculated according to 1 meter，when we accidentally fall, the place where the butt sits will bear the force of 10 times our body weight. If a person weighing 50 kilograms accidentally sits down, the weight will reach a terrifying 500 kilograms. Therefore, the pressure resistance of an electric hot water bottle is very important. Many merchants will let a car run over it to prove that their electric hot water bottles are strong enough to withstand pressure.
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