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The simplest 12V heat gun




Are you cold? Don't know how to keep warm? There is an exit! I bring to your attention, which works from a voltage of 12V! Now you will not be left without heat anywhere. This device is especially useful in carif a full-time oven does not work very efficiently. In addition, the “electric furnace” can be turned on immediately and after a couple of seconds it will generate heat, and to warm up the car from the engine, you need to warm up the engine for some more time, and during this time you can blow out.

not much different from a heat fan, just a gun delivers warm air more purposefully, it is more convenient for it to heat various objects and so on. Going to homemade very easy, all materials are easily accessible, and few tools are needed. So let's get started!

Materials and tools used by the author:

Material List:
- a can of canned food, paint and the like (suitable diameter);
- a fan from the computer to 12V;
- steel wire;
- cogs with nuts;
- a protective lattice for the computer fan;
- heating wire (nichrome or the like);
- gypsum;
- a syringe for 30 cubic meters;
- switch;
- cable.

Tool List:
- soldering iron:
- scissors;
- drill with drills;
- a screwdriver.

The process of manufacturing a heat gun:

Step one. We make a heating element
First, we make a heating element, it is made classically, in the form of a spiral. The author uses nichrome 1.8 mm thick and 61 cm long as a wire, based on the inscription in the video. You need to wind the spiral on a syringe, it is strategically important!




Step Two We make the core of the heating element
You have probably noticed that spiral heating elements are often located on special non-combustible cores, they are made of various materials. The author decided to make a core of gypsum. We dilute the gypsum with water to a liquid state, and then we collect inside the syringe, on which we previously wound the heating element. Put a needle on the syringe so that the solution does not leak.

Now you need to pull out the piston and fix the syringe in an upright position, as a result, the gypsum will dry out, and we will get an excellent core.



Step Three We prepare the case
As a case, a jar of canned food of a suitable diameter is suitable. The author chose such a size that it was convenient to fix the protective lattice that he had on the bank. Drill all the mounting holes in the jar, and then cut out the bottom using a can opener.Use sharp-nose pliers to clamp the sharp edges inward so as not to get injured during work. If you wish, you can paint the case.





Step Four Install the fan
We proceed to the installation of the fan. The author had a nylon cap that fits perfectly on the can. In it, clearly in the center, you need to make a hole of such a diameter so that you can install a fan. The author cuts a hole using a soldering iron, this is the easiest method.





Well, now the fan can be mounted, but do not mix it up and set it so that it works by blowing air in. We fix the fan using screws with nuts. Now you just have to put the lid on the jar.

Step Five Preparation and installation of the heating element
Take the syringe into which we previously filled the plaster. With the help of a soldering iron and a special nozzle in the form of a knife, the author carefully cuts the syringe and removes the rod from gypsum from it. Along the core, you need to carefully drill a hole, if it is not completely frozen, then it will be easy to do.

Still prepare a piece of wire, with the help of it the heating element will be mounted inside the gun. It is better to fix it with a bolt and nut, so you tighten the structure securely.





We put a spiral on the core, and connect wires to the ends of the spiral. Here you will need to twist the wires in half so that they are less heated. We attach power wires to the ends of the spiral, it is desirable to fix them on bolts with nuts, so there will be a more reliable contact. But here you need to come up with a more reliable connection, since when heated, the copper wire will burn out and soon the contact will be broken. Install the heating element inside and pull out the cable.

Remember that the device consumes a lot of current, so the cable should be selected taking into account this feature.



Step Six Final gun assembly
On the case you have to fix the switch, and also solder the wires to it. For those who do not understand where to connect, there is a simple scheme. The fan is switched on in parallel with the heating element.






It is also important for you to make the legs for the heat gun so that it stands confidently. The author makes the legs of steel wire. Just bend to the desired profile and install in the holes in the case. If you will use a gun in a car, you will need to make a more reliable bracket so that the gun does not fall and burn the car when driving.


Seventh step. Testing
That's all, the device is ready to use! We connect the 12V battery and measure the temperature of the outgoing air. At the author, it rises to 230 degrees Celsius or more, pretty good indicators, is not it?

In conclusion, it should be noted that such a strong heating of the spiral will quickly disable it, so it is better that the heating element is dark red during operation, then the gun will serve more. It is also important to make sure that the device turns off when it overheats, otherwise, if the fan fails, the spiral will quickly burn out and a fire may occur. That's all, good luck, take care!
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32 commentary
Author
This is called replacing words with synonyms to increase readability.
So he can have an engine separate from the MOTOR smile
I also bought this heater. They don’t even warm your finger in your hand! Sfotal him and sent to gr TINNERS so as not to buy-So the moderators plowed me right there in the emergency
Author
Well, I think so ... enough for that. And if directed in the face, it will be much nicer
Today came a friend. I look at the heater under his glass. He asked how he warms? He says he warms the glass and hands while waiting for the machine to warm up.
Dmitrij,
Quote: Dmitrij
The article should be renamed - "How to bring Valery to a nervous breakdown with a heat gun"

smile
... But this is crap !!! !!! ... This discussion, on the contrary, is fun! fool
But in general, my psyche is strong ... If, for example, I started drinking beer, and at that time someone told me: “Vasya is dead !!!”, then I first finish my drink, then I wipe my lips, then I pour more a mug ... And only then I say ... "Well, what the hell !!! It can’t be !!!"
popcorn
I found a Chinese hated by you ...

Why are you looking for him? ... In my basement, two of them are lying around - I took "suckers" from my friends)))). They bought, seduced ... Then, so as not to throw it away, they gave it to me ... (Everyone knows that I collect this kind of crap, like burnt equipment and stuff for spare parts and homemade products) ... I thought about somehow stick in additional spirals so that it can be adapted for heating the rear windows in sedans. In the same place, powerful wires already lie to regular heating, which, as a rule, works in old machines "through one thread" ....
Author
The article should be renamed - "How to bring Valery to a nervous breakdown with a heat gun"
The author is a fool, or is kidding ??? What sensor does it show ???? The temperature of the air leaving, as he said, “out of the snout” ??? And that these a couple of liters per minute warmed up to fifty will give for the car ???. Let him put the sensor under the glass, half a meter from the fan. And not on the very snout !!!
This is the first ...
And secondly, (AND IMPORTANT) let it be removed not at +4, but at -20 !!! Then even at the exit "from the snout" he will receive air of only room temperature !!! And get it a little! And therefore, mixed with cold, already twenty cm from the "snout" the air will be zero temperature ...
Quote: Dmitrij
Although if you estimate in kcal, the gun heats the air in a minute no more than 2 degrees.

if you estimate in kcal, then what does the degree have to do with it? )))))
.. Oh well, dick with him ... I understand your idea ... And she is just one of the "bright" finally ...
Now think about how many of these kilocalories give away glass with intensive blowing with icy air ???
Author
we stand still, why do we need 100 km / h) It is needed at the start

I found a Chinese hated by you ...

Dmitrij,
Quote: Dmitrij
How long does a cube of air cool in a car heated, say, to 50 degrees? About.
.

Well Dmitry, well !!!! Yes, ruff, you sweep to sweep !!!! )))))))
.. Uh ... And with whom am I talking here right now ??? ...)))))
In winter, at minus 20 at a speed of 100 - in 20 seconds it will cool to almost zero, I think ... In a stationary one - it depends a lot on the car ... The Lada will cool longer, the Audi 100 will be much faster .. ( But answer, why? I want to see if you understood what I wrote))))
In summer, in a standing car - it will not cool down at all ... In a moving one - in a couple of hours up to 30 ... (If the windows do not open)
Judging by the video, the author’s air warms up to a temperature of 50 degrees,

!!! HOW MUCH, look? !!! ok (screaming out loud !!! Oru straight !!!) clapping
What does it have to do with " BEFORE" ????
Important - ON how much !!
Author
Although if you estimate in kcal, the gun heats the air in a minute no more than 2 degrees.
It is the simplest products, as a rule, that cause a lot of controversy -)))
Such a simple and non-viable product caused so much controversy. Where at all who saw that heat guns were made for low voltage? This is a lot of problems - the power source, wires, dimensions ... So, what good, we will soon discuss the enthalpy of air. And that’s all, judging by the latest comments smile
Author
How long does a cube of air cool in a car heated, say, to 50 degrees? About.

Judging by the video, the author warms up the air to a temperature of 50 degrees, even if the fan is half as much, it’s half a cube of air per minute with a temperature of 50 degrees.

Of course, all this is doubtful for 200 watts, but still ..
In addition, the blower’s air pressure is higher, but the stove has a large volume, so I find it difficult to answer about the amount of circulation. It may well be the same for a hairdryer and an oven.

Again elementalism ...
The speed is higher, not RAP !!!
You can run a thin but strong stream of boiling water into the bathtub. And you can immediately pour in a huge amount of water heated to 50 degrees, and at the same time the water in the bath will heat up SAME !!! Agree with that ???
So, for the third time I will repeat "Well, DO NOT confuse temperature with the amount of heat, and the speed of the jet with its volume !!!!
The main characteristic is POWER !! You need to compare how many KILOWATT the hair dryer gives out, and how many of these same kilowatts the car heater gives out !!! Such characteristics are not written by manufacturers, but believe me, its power is not lower, but most likely significantly higher than that of a hairdryer !!!
And by the way, look how powerful your hair dryer is! (Well, not 200 watts, that's for sure !!!).
Just in case, I’ll say that the efficiency of heating devices is close to 100%. (The hairdryer is slightly lower due to losses on the motor). So that its thermal power will be close to its power consumption ...
You never know ... Suddenly you don’t know that either ...
... Excuse me, Dmitry ... I wanted not to write ... But I will write ...
What the hell are you getting into "perpetual motion machines with wave theories" ??? You will understand in elementalism first ....
(If Che, I am "kind" ...))))))
. It’s really possible to heat an object up to 200 degrees with an ordinary hairdryer, there’s no oven .. Otherwise, the car would catch fire.

Dmitry ... In the last post, I apologized for explaining basic concepts ... As I see it, in vain ... (You do not seem to read about the temperature of the cigarette))))) ...
Once again, focus ... Do not confuse temperature and amount of heat !!!.. These concepts are related, but they are DIFFERENT !!!!

But the following statements simply shocked me !! Excuse me, but now I will begin to explain to you what, so far, every schoolchild thought, sows!
Heat loss through the glass is small, IMHO, relatively ... The air has poor thermal conductivity.

... Ah, you God!
"Temperature" is a chaotic "twitching" of particles of matter. The higher it is, the more they twitch! (I hope you even know that?).
"Heat conduction" is the ability of bodies to transfer energy (heat transfer) from warmer parts of the body to less heated parts of the body.
It follows, figuratively speaking, that the harder the substance, the greater its thermal conductivity! Because atoms densely spaced to each other will quickly transfer their “twitching” to neighboring ones than those that are far apart !!!
So, glass, although it does not have a crystal lattice, is very, very hard !! In order to make sure of its thermal conductivity, try to hold in your hands a piece of glass, holding a lighter to it! ))) You instantly burn their fingers ... (I think you agree with this too?). Then we proceed directly to the "mechanism for removing tepp from the car" ..
Yes, you correctly noticed that air has poor thermal conductivity. (Now go back and read what thermal conductivity is !!!). Heat does not need to pass inside the air !!! It is enough to quickly switch from glass to a thin first layer (And glass, as we have found out, is an excellent conductor of heat), such a phenomenon as convection takes effect !!! This portion instantly expands and under the influence of the damning Archimedean force, is carried up, and it is replaced by a new portion of cold air,to instantly pick up and take away another portion of heat !!! Glass only REALLY gives heat very quickly, but it blows its air! And it blows very fast! And the faster, the higher the temperature difference !!!
(This is how radiators work). And the glass is an excellent radiator for cooling the cabin !!!
To partially eliminate the phenomenon of convection, this portion of the air must be "kept out" (double glazing). To completely eliminate - air must be connected in all planes (polystyrene).
And the reason for the temperature drop in the cabin at a speed is not the "influx of cold air" ... It’s just that when the car is stationary, convection (mixing) occurs only in the vertical direction. And when it goes - the glasses are blown and the higher the speed - the more intensively the air carries away heat from the glass surface! Now with vertically arranged ones too.
and ... it’s for a heat gun ... and for some reason I thought that it was shooting after an overheat ... Archimedes say the gun was made without gunpowder ... there it shot from overheating of water ... from I think to repeat ...
The motor of the machine can be heated with this gun in the cold ...
did you have a hair dryer or a hair dryer ...
Author
A hair dryer heats the air to much higher temperatures than a stove in a car. It’s really possible to heat an object up to 200 degrees with an ordinary hairdryer, there’s no oven .. Otherwise, the car would catch fire. In addition, the blower’s air pressure is higher, but the stove has a large volume, so I find it difficult to answer about the amount of circulation. It may well be the same for a hairdryer and an oven.

Heat loss? The strongest heat loss is the leakage of warm air, and even worse - the intake of cold air. I recently drove at minus 15, at a speed of 80-90 km / h, the car, and at 50 it’s already hot at medium speed.
Heat loss through the glass is small, IMHO, relatively ... The air has poor thermal conductivity.
Dmitrij,
Do you have more windows in your house than walls, and they are also single? ))))
Sorry, but let's go over the "basic concepts" ...
Any room, whether it be a room or a car interior, has heat loss - with a temperature difference, the heat "leaves" out of the room. The larger the temperature difference, the more intense these losses. They also depend on the area and (most important) the thermal conductivity of the outer walls! (That is why the walls are insulated with materials with low thermal conductivity, and the glass is double and triple). I think this is clear to everyone ... So, these heat losses are also measured in kilowatt hours !!! And if your room, for example, loses one kilowatt of thermal energy in an hour, then an electric heater with a power of one kilowatt will NEVER raise the temperature in it !!! He can only support her! And in order for it to increase, its power must be greater than the heat loss of the room !!! (I think you agree with that?)
... So, a huge area of ​​single car windows in severe frosts will give out a very large thermal power !!! You may warm it up with a household hairdryer (there’s also more than a kilowatt of power!), But it’s unlikely that a 200-watt spiral will ....
As you yourself noticed, the hair dryer heated the room. Agree, it’s not very effective .. Now answer, what gives a more powerful stream of hot air? A household hair dryer, or a “stove” in the car, turned on at full power? ... Agree - a “stove” ... And what, is it so hot in the car in cold weather ??? But in your room it would be much warmer from her than from a hairdryer ...
Author
I can only say that I once heated a room with an ordinary household hairdryer xaxa It was quite warm for myself, and it’s freezing outside ... So for the car you need a “hair dryer” 5 times less ... At least 200 watts is not the ultimate dream, but there will definitely be no frost in the cabin.

And if the gun will blow on you, it's a gun, then in general it will be fine
Good ... Way 1 cube !!! Per minute!! Now, calculate how many degrees the pathetic 200 watts are capable of raising the temperature of this cube !! I doubt that a huge area of ​​glass is not able to give the same amount of heat to the outside air in a minute !.))))). But in fact, the temperature in the cabin will change only if the heater overrides this figure ...
Author
Well, 80X80X25, it gives out 1.04 m3 per minute, but here it’s kind of smaller.

Let him take off on the street in winter as well ...)))))
Does the author have a thermometer? Shows> 200 degrees. Although apparently he catches the temperature of nichrome ...

Do not confuse the concept of "temperature" and "amount of heat" !!!! At the tip of the cigarette is also more than a thousand degrees !!! So why then blast furnaces ?? Let's melt metal cigarettes! After all, there is enough temperature ...))))))
Author
Does the author have a thermometer? Shows> 200 degrees. Although apparently he catches the temperature of nichrome ...


Well then, Valery, put

How about you?
Gun power 200 watts,
It means that you will have to "blow out" unambiguously ... In the summer you will still feel a warm stream of air, and in winter it will feel inflated if you put your hand to the nozzle of the "gun" ...
200 watts for a heater is "about nothing" !!!
It will not be more effective, which many have already bought ... (And among them one of my acquaintances) .. They saw, probably, how the black-and-white "dubbed" driver got into a cold and also black-and-white car ... And then he turned on in the cigarette lighter plastic with a wire ... And ... Oh miracle !!! Immediately everything around became colored, and he even took off his hat, so it became hot for him ...)))))
In fact, this garbage has power - also only 150 tons of watts, respectively, sucking in air with a temperature of even -10, it will not make it warm at all .... And if the weak stream of this air will have a plus temperature, then, at most, a few centimeters from the nozzle ....))))
Author
The power of the gun is 200 watts, the calculator issued 16.6A, the cigarette lighter seems to be up to 15A. So the fuse needs a little more power.
And in conclusion ... And what current does this gun consume ??? If it’s not very large, then it can be turned on in the car’s cigarette lighter ... But then it won’t heat anything ... (As a result, you will “zadunite” !!!))))))
And if it is really powerful, then you can warm up only until the fuse blows ....
I once made a coffee maker with an element from a glow plug ... I had to use a powerful wire to get a socket for it in the cabin ...
But the purchased automobile electric kettle with a 200-watt spiral has been boiling for a very long time in the summer, and in the winter it could have not boiled at all!)))))
You need to wind the spiral on a syringe, it is strategically important!

We dilute the gypsum with water to a liquid state, and then we collect inside the syringe, on which we previously wound the heating element.
........... the gypsum dries and we get a great core.

Let me ask .... Uh ... nollega ....))))
And if I make a core and then wrap it around right away? ... It won’t work out?
and to warm up the car from the engine, you need to warm up the engine for some more time

But is it necessary to warm up the engine for a while to warm the car from the engine?))). And if you immediately warm up the engine, but do not touch the motor? smiles
So it will be faster, otherwise the witch can be blown up this time.

A driver who is stricken out is a danger to society .... boss

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