What Insulated Water Bottle Keeps Water The Coldest ?
We all know that the insulated water bottle relies on the vacuum insulation layer between the inner wall and the outer wall of the water bottle to prevent temperature transfer and achieve a constant state of water temperature for a long time. So what water bottle keeps water the coldest depends on how well the vacuum insulation layer of the vacuum flask is sealed. As a professional technical engineer who has been engaged in the field of vacuum flask manufacturing for more than 15 years, I will tell you what kind of insulated water bottle is the best choice for you.
Three factors that affect the change of water temperature in the insulated water bottle
Influencing factor 1: The sealing performance of the vacuum insulation layer of the vacuum water flask
In physics, the temperature cannot transfer heat in a vacuum, so the core factor that determines the thermal insulation performance is whether there is air between the inner and outer walls of the insulated water bottle. The vacuum water flask needs to be vacuumed during the manufacturing process. In the vacuum furnace, the air in the vacuum water flask is evacuated by high temperature and high pressure, and the air in the insulated water bottle is sealed off after all the air in the vacuum flask disappears.
There are three variables involved in the process of vacuum furnace air extraction, namely the temperature of the vacuum furnace, the atmospheric pressure of the vacuum furnace, and the operation time of the vacuum furnace. These three variable factors directly affect the thermal insulation performance of the insulated water bottle. The higher the temperature of the vacuum furnace, the lower the atmospheric pressure, and the longer the vacuum furnace runs, the better the thermal insulation performance of the insulated water bottle will be.
Influencing factor two: the thickness of the inner wall of the insulated water bottle
After the boiling water is poured into the insulated water bottle, the hot water and the inner wall of the insulated water bottle come into direct contact. Because of the principle of temperature conservation, at this time, the hot water will transfer part of the heat to the inner tank of the insulated water bottle, and the water temperature in the thermos water bottle will also decrease. According to the principles of physics, the heavier the weight of a low-temperature object, the higher the energy required to heat it to a certain temperature. So if the thickness of the inner wall of the insulated water bottle is thicker, the heavier it will be, which will absorb more hot water temperature.
During the research and development of the insulated water bottle, we found that the thinner the inner wall of the insulated water bottle, the less heat it absorbs in the thermos cup. In other words, the less the temperature of the water in the insulated water bottle will drop. In the same way, if we pour ice cubes into the insulated water bottle, the slower the ice cubes will melt.
In order to solve this problem, we adopted a rotary cutting process and used a CNC lathe to reduce the thickness of the inner wall of the insulated water bottle. The advantage of this is to reduce the water temperature change in the thermos cup, and the inner wall of the insulated water bottle after rotary cutting will be smoother and smoother, and it will still be as bright as new after long-term use.
Influencing factor three: the diameter of the cup mouth of the insulated water bottle
The larger the diameter of the mouth of the insulated water bottle, the more drastic the temperature of the hot water in the insulated water bottle will change. This is because the change in temperature is related to the heat dissipation area of the object. The larger the mouth of the water bottle, the larger the contact area between the water in the insulated water bottle and the outside air. Therefore, if you want to buy an insulated water bottle with excellent performance, it is recommended that you choose an insulated water bottle with a smaller diameter as your first choice when buying an insulated water bottle
Influencing factor four: the sealing cork of the vacuum water flask
All insulated water bottles with qualified performance can prevent water leakage when handstand them. However, the loss of temperature is usually not noticeable to the naked eye. Most of the insulated water bottle’s lids are made of plastic, and the hot water in the bottle transfers heat to the outside air through the plastic bottle plug.
When your hand touches the lid of the insulated water bottle, you will find that the temperature of the lid will be higher than the body of the insulated water bottle. This is caused by the temperature loss of the insulated water bottle lid. When choosing an insulated water bottle, it is recommended that you choose a vacuum water bottle with a 2-layer lid as your first choice.
Influencing factor five: the capacity of the insulated water bottle
The capacity of the insulated water bottle is not objectively the decisive condition for temperature changes, but objectively we will find that the large-capacity insulated water bottle can always maintain a higher water temperature than the small-capacity insulated water bottle for a longer period of time. why is that? Assuming that there are two insulated water bottles with the same diameter of the water bottle mouth, after introducing hot water of different volumes, the only factor that depends on the temperature loss is the cup mouth diameter of the insulated water bottle.
The capacity of two bottles of water is different, the large-capacity insulated water bottle means more heat is stored in the bottle. This is like a billionaire and a common man, spending the same amount of money every day, in the end, the billionaire must have more money left. Therefore, it is recommended that you buy a larger-capacity insulated water bottle, especially when you go out for travel or outdoor sports such as mountaineering, and lack the equipment to provide hot water, then a large-capacity insulated water bottle is more suitable for your actual needs
The above five factors are the fundamental reason why the hot water (ice water) in the insulated water bottle can maintain the slow temperature change for a long period of time. As a factory that provides OEM services for brands such as THERMOS, HYDRO, YETI, and Zojirushi, our vacuum water flasks use the exact same production process and process as these brands in the production process.
Each of our vacuum water flasks is subject to the same quality management system for quality control. In other words, except for the different brand names of the vacuum water flasks, the thermal insulation performance of each vacuum water bottle is exactly the same as those of these brands. The difference is that our prices are much cheaper than these brands. If you have custom insulated water bottle needs, please contact our sales team, we will answer all your questions as soon as possible.