What can be cooked from squid: quick and tasty
Water boils several times a day in hundreds of millions of kitchens around the world. And every person at least once in his life asked the question: "why does noise arise before boiling?" Someone immediately remembers the school curriculum and the unusual word "cavitation" comes to mind.
“Some bubbles are bursting - that's why the noise”, - the subconsciousness helpfully prompts. But few people remember the exact course of the process. And, moreover, few people know that noise is created simultaneously by two phenomena.
What is boiling?
What is boiling? There is a clear definition: "Boiling is vaporization that occurs simultaneously in the entire volume of the liquid." To start the process, the following conditions must be met:
- The presence of centers of vaporization;
- Constant heat supply;
The liquid reaches a certain temperature, called the boiling point.
Why do steam bubbles form in boiling water?
The centers of vaporization, around which bubbles begin to appear, are small cracks, greasy stains, solid particles - dust particles. They trap small volumes of air, and the liquid traps the air until it boils. Also, water contains dissolved gases: oxygen, nitrogen, carbon dioxide. The bonds between gas molecules and water molecules are weak and quickly collapse when heated. When the dissolved gas is released, the pressure of the water forces it to take on the most energy efficient - spherical shape. Bubbles are produced.
After gas evolution, heat begins the separation of liquid molecules. Steam is formed, which is released into the already formed bubbles. This is how the boiling process begins.
Causes of Boiling Noise
The first signs of boiling can be observed at the bottom of the kettle - there is the highest temperature, it is there that the first bubbles appear. Each of them contains gas and saturated steam. As long as the bubble is small, it is held by surface tension forces. Then the rapidly moving water molecules that form the vapor accumulate inside the bubble and it begins to grow. Detachment occurs at the moment when the force of Archimedes, pushing out the bubble, becomes greater than the tensile forces holding it. The bubble is released and rushes to the surface
Detachment causes fluid vibrations. It is these vibrations that are the first reason for boiling noise.... You can estimate the frequency of the sound you receive. It is inversely proportional to the time it takes for the bubble to break away from the bottom. Time, on the other hand, characterizes the strength of the oscillation caused by the separation.
Calculations have shown that the average separation time is about 0.01 seconds, which means the sound frequency is about 100 Hz. It was these data that allowed scientists to understand that there is some other reason for the noise when boiling a kettle. After all, the real frequency of the sound was measured and turned out to be an order of magnitude higher than the calculated one.
The discovery of the dual nature of noise was made by the Scottish scientist Joseph Black. This happened in the 18th century, while he was working at the University of Edinburgh.
The main source of noise when boiling water
It was Joseph Black who first investigated the boiling process and identified the source of the additional noise. He found that not all bubbles come off the bottom and walls and reach the surface. And at the very beginning of the boiling process, not a single bubble reaches the surface - they disappear in the water column.
The phenomenon interested the scientist so much that he spent several sleepless nights trying to discover the cause of the disappearance of the bubbles. Research has led to the correct conclusion. The answer turned out to be simple - the temperature difference. At the beginning of their movement, the bubbles are in the hottest part of the vessel. The saturated vapor pressure allows them to maintain a spherical shape.
Sound change when boiling water
When moving upward, the bubbles fall into colder layers. The steam begins to condense, the pressure inside drops. At some point, it can no longer hold its shape and collapses. The phenomenon of the formation, detachment and collapse of bubbles during boiling was called "cavitation"... The necessary calculations were carried out, which showed that the sound frequency during collapse is close to 1000 Hz. The data correspond to the experimentally measured parameters. As the liquid heats up, the bubbles stop collapsing and the noise level changes. The sound frequency drops noticeably. Soon, all bubbles, without exception, reach the surface. The noise subsides, there is a "gurgle".
The birth, separation, emergence and bursting of bubbles is a physical phenomenon that millions of people see every day. But boiling is harder than it sounds at first. Two processes can be distinguished: cavitation and fluid oscillation during bubble separation. Both produce a distinctive sound, but the acoustic effect of one is easily distinguishable from the other. You can easily tell by the noise when the water in the kettle has reached the desired temperature.
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Recently, manufacturers of electric kettles have been implementing the idea of a silent household appliances... They endeavor to make the most advanced quiet electric kettle. Users have access to unique models that boil, do not boil, do not make sounds and do not click.
The reason for the noisy operation of the electric kettle
The heating element of the device is located at the bottom, so the water is heated in layers. When it comes to a boil, bubbles form in the tank and are pushed upward. When faced with cold water they burst. It is the seething that is perceived as noise.
The boiling water in the kettle is perceived as noise
Important! The sounds of the kettle immediately after switching on occur when scale accumulates on the heater and indicate a malfunction.
General criteria for choosing electric kettles
To choose a quiet kitchen electric kettle among the huge assortment, you should familiarize yourself with the selection criteria for the device:
Rating of the best quiet electric kettles
Choosing the most reliable silent kettle for the home, we pay attention to an electrical appliance with a high-quality assembly, safe and energy efficient.
Budget models
Offers for budget-conscious buyers.
| Model | Specifications |
|
Tefal KO 150F Delfini Plus
Simple, without additional options, reliable electric kettle worth 2.2 thousand rubles. The body of the device is made of high quality food grade plastic. Equipped with a comfortable handle and a wide spout, there is a switch-on lock without water. The model quickly boils water without loud noise. Product weight - 0.8 kg, volume - 1.5 liters. Advantages:
|
|
Polaris PWK 1731CC
Electric appliance made of ceramics, 1.7 liters, with a power of 1800 watts. The device is priced at about 2 thousand rubles. decorated with a stylish pattern. The body is one-piece, without water level inserts. Removable cover with rubber insert. The nose is wide, equipped with a ceramic mesh instead of a filter. The kettle is equipped with silicone feet for noise suppression. Advantages:
|
|
Scarlett SC-1024 (2013)
A glass teapot, costing around 1.5 thousand rubles, has a capacity of 2.2 kW, a volume of 1.7 liters. The model is equipped with an internal light indication of operation - during boiling, the water is highlighted in blue. The lid is opened by pressing a button. The device easily rotates 360 degrees on the stand and is equipped with overheating protection. Advantages:
Minuses: at first, an unpleasant smell from the lid. |
|
Ladomir 140
Ceramic device for almost 1 thousand rubles. looks like a teapot. The power is 1.2 kW, and the volume of the tank is 1 liter. The device has protection against starting without water and an automatic stop when boiling. Power button with LED backlight.
|
Middle price segment
Devices for rational users.
| Model | Specifications |
|
Bosch TWK 3A011 (13,14,17)
Electric kettle costing up to 3.5 thousand rubles. with a volume of 1.7 liters and a power of 2.4 kW is equipped with a closed spiral. The device is made in a plastic case, equipped with a boil-out protection and a lid lock. The model has an indication of nutrition and the amount of liquid. Advantages:
|
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Redmond M153
The device is made in a stainless steel case. Its cost is about 3.2 thousand rubles, but is justified by its resistance to damage. The volume of the tank is 1.7 liters. Water level indicators are located on both sides of the case. The power button has a bluish backlight. Advantages:
|
|
Polaris PWK1748CAD
An electric kettle, which costs about 3.2 thousand rubles. has a housing with a volume of 1.7 liters. Heating is carried out from a closed spiral. Rotating body - made of of stainless steel... The power of the device is 2.2 kW. Works at 4 temperature levels, which are adjustable by the user using buttons on the base. The operating mode is displayed on the LCD. The lid is opened with a button. Advantages:
|
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Bosch TWK 8611
Electric kettle for 4 thousand rubles. with a jug of 1.5 liters. The user can adjust the heating temperature from 70 to 100 degrees. The double-walled device keeps the water hot for 30 minutes. Advantages:
Cons: easily soiled case. |
Premium models
Expensive electric kettles that are worth their money.
| Model | Specifications |
|
Bork K711
A model for almost 10 thousand rubles. with innovative technology Stealth - noise reduction due to the annular diffuser. The volume of the tank is 1.7 liters, and the power of the device is 2.4 kW. There are options for blocking switching on without water, indication of switching on and filling level. A sound is heard when boiling. The lid is opened with a button. The filter is removed for cleaning. Advantages:
|
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Redmond Sky Kettle M170S
A "smart" device in a steel case with a plastic shell, costing about 6 thousand rubles. The volume of the kettle is 1.7 liters, the power is 2.4 kW. Equipped with 5 modes of maintaining temperature and heating water. It can be used to cook baby food, yellow, green and white tea. The device is controlled by a smartphone remotely or by buttons on the touch panel. The device is equipped with R4S technology, which will wake you up at a given time with a beautiful melody, as well as a night light option.
To release the lock, press the "+/-" button on the control panel three times. |
|
Rommelsbacher TA1400
A modern multifunctional model in a glass case with several heating modes and a power of 1.2-1.4 kW. The cost of a device with a built-in teapot is about 13 thousand rubles. The rubberized feet of the stand have additional noise cancellation. Information about one of the programs is displayed on the LCD display. The pitcher is made of durable Schott Duran glass. The volume is 1.7 liters. The device turns in a circle and maintains heat for 30 minutes. Advantages:
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- The more power of the electric kettle, the faster it heats up;
- The most convenient and quiet home kettle is an electrical appliance that must be protected from being turned on without water and overheating;
- The optimal volume of a jug for a family of 3 people is from 1.7 to 2 liters;
- Closed heating element eliminates the risk of injury;
- Durable case does not heat up;
- Models with open spiral burn out faster;
- Ceramic teapots weigh a lot and are subject to mechanical stress, but retain heat longer;
- The glass container needs careful maintenance.
Watch a video on how to choose an electric kettle
HOME »SOLUTION
2014-05-31
Why does the kettle make more noise before boiling?
Solution:
Before boiling, steam bubbles begin to form in the hottest areas of the kettle, for example near the walls. However, as a result of contact with colder masses of water, the temperature of the walls of the bubbles may be insufficient to create atmospheric pressure in the bubbles. Therefore, the newly formed bubbles collapse, which causes a lot of noise.
Have you ever thought about what makes sounds when a kettle boils?
If you think well, you can guess.
Why does the kettle make noise when heated?
And the best thing is to immediately go and look into the kettle - we will see rising air bubbles, which burst at the end of their path and make a sound.
Where do these bubbles come from?
Let's say that we have an ordinary electric kettle that heats water with a current that heats the spirals from the bottom of the kettle. Therefore, the temperature at the bottom of the kettle is very high, which is higher than at the top of the vessel. Because of this, bubbles form at the bottom, which form when boiling. After the water is very hot, the bubbles separate from the bottom of the kettle and float upward, where they decrease until they burst.
Later, we do not hear the collapse, because the temperature in the kettle is very high. The kettle is boiling, and we only hear a gurgle, as these bubbles become very large from heat and they become much larger.
Maybe, of course, this is due to the contact of hot with cold, and when the water is very hot, the sound becomes less. But we still hear the gurgling!
By the way, we must not forget that sounds attenuate in the volume of the room, and that our ear perceives low and high frequencies in different ways, and because of this, the noise becomes less noticeable when heated.
In conclusion, I will say: "What difference does it make how it gurgles there, the main thing is that the tea is delicious!"
Grade: 3
Uniqueness: 97 %
Date of publication: 30.03.2012 19:41
Factrum warns that although this is very important to know, it is not taught in school. When the water boils, its composition changes, which is completely normal: the volatile components turn into steam and evaporate. Thus, boiled water is safe to drink.
But when the water boils again, everything changes for the worse:
Boiled water is completely tasteless. If you boil it several times, it becomes very, very tasteless. Some might argue that raw water also has no taste. Not at all. Do a little experiment.
At regular intervals, drink tap water, filtered water, boiled once and boiled many times. All of these liquids will taste differently.
Life is in full swing
When you drink the last option (boiled many times), an unpleasant aftertaste will remain in your mouth, some kind of metallic aftertaste.
In addition, if you decide to re-boil water, then pay attention to the fact that how much time has passed since the last boiling process. If a long enough time has passed, then it is better to drain the water and pour fresh water into the kettle. The fact is that various harmful microorganisms develop faster in stagnant water, and more dust and other debris gets into it.
So, here are some useful tips:
- pour fresh water each time to boil;
- do not boil the liquid again and do not add fresh to its remains;
- before boiling water, let it stand for several hours so that heavy substances settle to the bottom;
- pouring boiling water into a thermos (for preparing a medicinal collection, for example), close it with a stopper after a few minutes, not immediately.
Read also: This is why we must start work or study no earlier than 10 in the morning.
Did you like the post? Support Factrum, click:
www.propochemu.ru. 11/17/2015
uForum.uz> THEMED FORUMS> Warm-up for brains> Why the kettle makes noise
View full version: Why is the kettle making noise
09.03.2011, 10:42
Alexander Sofyenkov
09.03.2011, 10:48
Why does the kettle with water make noise just before boiling and the noise drops sharply at the moment of boiling? What processes create this noise? Don't ask me a guess ... I don't know her, I can only guess.
At the heated bottom of the kettle, the water turns into steam, the steam bubbles rise upward. But before reaching the surface, the vapor cools down, the bubbles collapse.
Hence the noise.
The whole process can be seen in a glass teapot.
09.03.2011, 10:53
Alexander Sofyenkov
09.03.2011, 11:04
But before reaching the surface, the steam cools down, the bubbles collapse. Hence the noise, so why the noise? They collapse - they don't collapse, especially since they collapse as evenly as they appear. By the way, when heating water in a saucepan (without a lid), there is no such sound, and with your explanation, the sound should not have disappeared.
Maybe the hydrodynamic and acoustic characteristics of the kettle somehow affect 🙂
Gotta watch
Evgeniy Sklyarevskiy
09.03.2011, 11:38
in a saucepan (without a lid) there is no such sound So it's all about the spout!
09.03.2011, 11:45
They collapse - they don't collapse.
09.03.2011, 11:52
You clap your hands, and think about where the noise comes from. When I press my hands, there is no noise (this corresponds to the reverse absorption of steam into the water), and if there is, then from the escaping air escaping from the palms (and we have no escaping steam - the steam pressure is not lower than the water pressure on the walls of the bubble). So?
So it's all about the nose!
Why does the kettle make a noise when turned on, then it stops, and then it makes a noise before it boils?
Maybe ... and what makes the spout whistle when the water is not boiling and what prevents the spout from whistling harder when the steam is boiling like a shaft? It seems to be where easier process vaporization, but we do not really know anything here either.
09.03.2011, 13:02
So why the noise? They collapse - they do not collapse, especially since they collapse as evenly as they appear.
When collapsing, a short-term local change in pressure occurs - the essence is the same sound wave. This is not the only example - for the same reason, when an incandescent lamp breaks, the ringing is accompanied by a clearly audible bang. The uniformity of the appearance and bursting of bubbles is relative - some time passes between the collapses, the duration of these intervals is different, but fits well into some framework. The result is a real "white noise", the "voice" of chaos.
You clap your hands, and think about where the noise comes from.
What does one hand clap sound like?
09.03.2011, 16:15
This is not the only example - for the same reason, when an incandescent lamp breaks, the ringing is accompanied by a clearly audible pop. Here the situation is different. The vapor is collected in a bubble and turns back into water by sticking to the colder water. There is no excess pressure at all. The ball bursts / collapses absolutely evenly over a relatively long time, comparable to the bubble lifetime.
09.03.2011, 20:09
There is no excess pressure at all.
There is 🙂 Only not excessive, but on the contrary - negative, since during vapor condensation the bubble is not filled with anything. It collapses, hence the sound.
Alexander Sofyenkov
10.03.2011, 01:02
Found an interesting article about boiling water: http://www.t-z-n.ru/prehme/int_boiling.html
10.03.2011, 01:43
Only not excessive, but on the contrary - negative So the process of dissolution of a bubble is continuous, where does a vacuum without pressure suddenly form? That is the question.
11.03.2011, 13:51
Bubbles of steam travel from the hot bottom to the cold upper layers and become water, collapsing with great speed and the formation of sound waves. There will be noise in both the kettle and the pot.
Moving to an area with more high pressure, the bubble cavitates, collapses, emitting a shock wave. "Cavitation" occurs as a result of a sharp drop in fluid pressure. This is what destroys the surface of propeller pumps, hydro turbines. Due to the "cavitation" in washing machines it turns out a gentle wash and it is more convenient to clean antiques.
11.03.2011, 14:45
Bubbles of steam travel from the hot bottom to the cold upper layers and become water, collapsing with great speed and the formation of sound waves. Is there any confirmation? There will be noise in both the kettle and the saucepan. Do you have a shurpa in the cauldron before boiling?
11.03.2011, 14:48
Why does the kettle with water make noise just before boiling and the noise drops sharply at the moment of boiling?
And you yourself sit comfortably ... I suppose it won't work in silence either .... 🙂
But seriously, the kettle is noisy too.
I think that this is due to the heating of the coil (heating element) and the rapid heating of the water near it. In the case of gas, the metal on the sides of the kettle heats up, and the droplets of steam and a film of water wetting the sides quickly evaporate (the effect is almost the same as if you drop water on a hot metal)….
that is, it is a local boiling of small water droplets. And when the water boils over the entire volume, then all of it evaporates evenly ...
11.03.2011, 15:23
Such strong arguments: Bubbles of steam travel from the hot bottom to the cold upper layers and become water, collapsing with great speed and the formation of sound waves. Mathematical model? There will be noise both in the kettle and in the pan. Do you have a shurpa in the cauldron before boiling?
14.03.2011, 11:41
And who needs it? The question is what? Why is the kettle making noise? Is it necessary to model mathematically to explain why?
Try *** confirmation to make the following experiments:
1. Heat the kettle with different amounts of water: from 200 ml to 1.5 liters.
At the beginning of heating, the kettle does not make a sound for several seconds; then appears
and the noise grows, which, having reached its maximum, begins to subside and
replaced by the gurgle of boiling water.
The amount of water does not affect the sound intensity, but the more water,
the longer each of the noise periods (silence, increasing and
fading noise, gurgling).
2. The same, but with open lid.
The nature of the noise change is the same (silence, increasing and
fading noise, gurgling), but: firstly, the noise became louder, and secondly, while
with the same amount of water, the duration of the second stage increased.
The noise appears together with small bubbles on the teapot's heating element, which,
breaking away from the heating element, they do not reach the surface of the water, but "dissolve" in it.
3. Place a hollow object (glass
bottle).
The volume of the sound will decrease, the nature of the noise will not change.
4. Clamp the kettle between two wooden dies.
The result of the experiment coincides with the result of experiment No. 2.
Hypothesis 1.
When turned on, the heating element of the kettle
begins to intensively heat the lower layers of water, with
the release of small bubbles of steam. Steam bubbles
begin to rise and, in contact with not yet
heated mass of water, condense. As a result
instant condensation occurs multiple "collapse" of small vapor bubbles,
which generates vibration of water and, as a result,
noise. The increase in noise at the beginning of the experiments is explained by
an increase in the number of bubbles - adjacent to
tenu layer of water begins to warm up. Explanation
decay is that the temperature of the water in the kettle
the process of condensation of steam in water also increases
slows down and the water starts to boil.
Confirmation of this hypothesis:
The appearance of noise along with bubbles on the heating element of the kettle;
Reducing noise when heating water into the kettle;
Reducing noise when installed on a heating element empty glass bottle –
the area of contact of the heating element with water has decreased.
The body of the kettle cannot be considered a source of noise, because:
With the lid open, the kettle makes a louder noise, and the kettle gripped in a "vice"
makes no less noise, i.e. the body also serves for soundproofing.
The final confirmation of the hypothesis will be the heating of water in that
the same kettle, but with a reduced power of the heating element.
Experiment with his ten.
Conclusions:
The amount of water in the kettle affects the speed of boiling: the more water,
the longer it takes to boil;
The closed lid keeps the teapot warm and the water boils faster;
The kettle makes less noise if hot water is heated in it.
Before boiling, the water in the pan makes a noise, but what about you? 🙂
14.03.2011, 18:59
The water in the pot before boiling makes a noise for me, but for you? I sometimes boil water in a cauldron and the cauldron does not make noise. And the kettle makes noise ... even with the lid open 🙂
Evgeniy Sklyarevskiy
15.03.2011, 00:13
I sometimes boil water in a cauldron and the cauldron does not make noise. And the kettle is noisy ... even with the lid open And if you solder the spout to the cauldron? What are the predictions?
15.03.2011, 08:58
And if you solder the nose to the cauldron? What are the predictions? There will be no noise ... there is always a question in the temperature of the surface in contact with the water. In a cauldron, it is lower, since the cast iron is thick, and in a tin pan, it is higher, since the tin is thinner. I say, without a mathematical model, you can't figure it out with bubbles 🙂
15.03.2011, 14:03
In a cauldron, it is lower, since the cast iron is thick, and in a tin pan, it is higher, since the tin is thinner, but it seemed to me that the difference was in the surface area. The cast iron will still warm up, but the contact area at the cauldron is larger and "more voluminous" or something ... accordingly, the liquid heats up in a larger volume, and the difference in temperature at the lower and upper layers of water is less.
15.03.2011, 14:30
and "more voluminous" or something ... Maybe so. Due to the thick wall, the heat is better redistributed from the bottom to the edges ... but then a large cauldron for pilaf should have "made noise", but it also does not make noise.
15.03.2011, 17:09
What is noise for you? How many db? 🙂
what happens if the same water in a kettle is boiled in a vacuum?
28.03.2011, 11:40
what happens if the same water in a kettle is boiled in a vacuum? I have a gas burner - it does not burn in vacuum.
In the absence of thoughts, something gushes out that is mistaken for wit
Noise occurs when the water temperature gradient is high. In thin-walled and electric kettles, this situation is typical, but the cauldron is not.
28.03.2011, 16:09
Something that is mistaken for wit is gushing out Is there something funny said?
Where: Noise occurs when the water temperature gradient is high. In thin-walled and electric kettles, this situation is typical, but the cauldron is not. I agree with this, but it was better to clarify everything right away. For example, in a thin-walled skillet (wok, for example) would sound appear? The answer is yes and no - it depends on other physical parameters. For a sound to appear before boiling, a combination of:
conclusion: not in every teapot and not always water makes a noise before boiling - here it is not in the shape of the spout, but in the amount of water and the design of the teapot. If, for example, you put a boiler in a ceramic teapot, then, according to the theory, the water should not make noise before boiling.
28.03.2011, 20:46
Something that is mistaken for wit is gushing out Is there something funny said? Where: Noise occurs when the water temperature gradient is high. In thin-walled and electric kettles, this situation is typical, but the cauldron is not. I agree with this, but it was better to clarify everything right away. For example, in a thin-walled skillet (wok, for example) would sound appear? The answer is yes and no - it depends on other physical parameters. For a sound to appear before boiling, a combination of:
1) a thin and preferably flat bottom (for high heat transfer from the burner to the water);
2) the high wall of the vessel (and therefore the flat bottom), so that the water in the upper layers is heated only due to the convection of warm water, but not from the walls - for this reason, the kaza is not suitable - heat transfer also comes from the walls of the cauldron and the sound does not appears.
3) A sufficient amount of water in the vessel so that the heating of the upper layers lags significantly behind the lower ones.
Those. conclusion: not in every teapot and not always water makes a noise before boiling - here it is not in the shape of the spout, but in the amount of water and the design of the teapot. If, for example, you put a boiler in a ceramic teapot, then, according to the theory, the water should not make noise before boiling.
Shouldn't, in your opinion, but it makes a lot of noise. Could it be cavitation?
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Today we will talk about electric kettles, more precisely, about the conjectures and misconceptions associated with them.
You can write your opinion in the comments.
Myth 1. Water in a kettle is saturated with harmful substances during boiling.
This is only true for the lowest quality products. If the body of the electric kettle is made of high quality material, there is no danger. The most environmentally friendly in this regard are glass and ceramics, which in essence are not capable of entering into chemical reactions... Moreover, contrary to popular belief, modern glass teapots are very durable and resistant to damage.
But their metal counterparts are more reliable than ceramic and glass electric kettles. Metal products are more durable, and high-quality stainless steel also does not emit any harmful components when heated (note: by the way, now there is a lot of low-quality imported stainless steel on the tableware market - manufacturers and managers do not think about consumer health - see our articles about dishes. But This concerns teapots less, because in them just water comes into contact with stainless steel, and not an acidic medium, as in pots).
As for plastic models, theoretically, only safe food grade plastic should be used for their production, the shelf life of which is about 3 years. In our opinion, metal and glass electric kettles are still preferable to plastic ones, because plasticizers, albeit in small doses, but gradually pass into water.
Why electric. the kettle starts to make noise as soon as scale appears in it?
And after the expiration of these 3 years, it is certainly better to replace the device with a new one. A large assortment is presented on the stores' sites electric kettles different models, so if your product needs to be replaced, just go in and select a new suitable device.
Myth 2 (this is not a myth, but the truth - editor's note). Electric kettles can cause a fire
Modern kettles have a power of 2-2.5 kW and are designed for standard wiring, sometimes you can find 3 kW models that can only be used if the wiring is in perfect condition. The use of the latter type of products with insufficient quality wiring can just cause a short circuit. The only thing worth noting is that a short circuit due to poor-quality wiring can occur when using any electrical appliance - not just a kettle. In any case, you should be careful with electric kettles.
Myth 3. In electric kettles with a "gilded" spiral, scale does not form
“Gilding” on the spiral of the item is titanium nitride. This compound is resistant to the action of various chemical substances and protects the coil only from corrosion. Protection against scale is provided by the use of purified or spring water, as well as the purchase of kettles equipped with built-in filters. It is better not to buy teapots with a "gilded" spiral, as the "gilding" gradually passes into the water you consume, and there is nothing good about it.
Myth 4. Do not heat a small amount of water in an electric kettle
If the device has an auto-off function when boiling and working without water, you can safely heat water for one cup in it. You just need to ensure that the liquid completely covers the heating element.
Myth 5. Electric kettles are suitable for heating soup and boiling milk
Who among the first users of electric kettles did not try to cook dumplings, sausages or warm soup in them? Remember the result? And also remember that the manual for any product says that nothing can be placed in it except water, since food particles can stick to the heating element, and the expanded liquid squeeze out the lid of the device? Similarly, do not use carbonated water to descale your kettle. Our inquisitive minds have long found out that the same “Coca-Cola” or “Sprite” contain orthophosphoric and citric acids, which dissolve plaque. However, along with them, there are also dyes with sweeteners, which are easily eaten into the coating of the heating element and inner part instrument cases.
The boiling process is always accompanied by noise. However, in some kettles, it is quieter than in others louder. This can depend on many factors. Namely: on the type of heating element, the material from which the body is made, on the shape, on the build quality of the device, on the thickness of the bottom, on the power of the kettle, and possibly also on any features of this or that model. It is noticed that the plastic is a little (quite a bit), but still muffles the sound, but the metal does not; a flat heater (not to be confused with a hidden one) is more conducive to the quiet operation of the device than a round one, and a powerful device will heat the water faster, but at the same time make more noise than a low-power one. However, it is not a fact that buying a kettle, even taking into account all these factors, will turn out to be noiseless.
There are no completely silent teapots in our stores yet. And the advice of those who already use this or that model will help to find a not very noisy model. The information shared by lovers of home tea is always true (as opposed to advertisements in the store). After reviewing the user reviews left, I identified the five "quietest" electric kettles. Here they are:
Braun WK 300 (2011)
The model is distinguished not only by quiet operation, but also by a number of positive characteristics. The device has a power of 2200 W, a plastic case, a closed spiral. A fairly large volume of water (1.7 liters) boils in just five minutes. Reliable European quality, Beautiful design, comfortable handle. The model is equipped with a multi-stage security system.
The device switches off:
- when water boils;
- with the lid open;
- in the absence of water;
- when removing the kettle from the stand.
The kettle is equipped with a limescale filter that can be easily removed and washed.
Philips HD 4646 Is the best-selling model of this brand. Many users advise to buy, as they believe that for very little money you will get the perfect branded teapot. Reliable, simple, voluminous (1.5 liters), powerful (2400 W), boils quickly and without unnecessary noise.
- this small elegant kettle (only half a liter of water) and low power (only 600 W) will not annoy you with noise at all. It can be used both stationary and as a road version. The set includes two travel cups. The lightweight model is made of high-quality plastic, has a closed spiral, and is very convenient to use.
- typical for this model: volume of 1.6 liters, power 2200 W, closed heater (disk), removable filter from scale. The body of the kettle is made of high quality stainless steel with decorative enamel coating. The bright backlight of the water level scale complements original design... An excellent model for real aesthetes and the noise level will not confuse anyone.
- another model of a quiet miniature, but quite decent electric kettle. The volume is 0.600 liters, the power is 700 W, the closed spiral (disk), the combined body is made of metal and plastic. One of those pieces that you can travel with.
The only device that can boil water almost silently is a thermopot. Compared to an electric kettle, a thermopot brings water to a boil much longer. And with a very slow process of boiling and noise will be less. In addition, the thermal insulation (double walls) inherent in thermopots is excellent at absorbing sound. But the problem is that many people need an electric kettle, and not a thermopot with its slow boiling and the subsequent mode of maintaining the temperature.
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