00:00We're going to build a homemade cooler that uses a small flame as its power source.
00:05Stay until the end of the video to see how we do it.
00:08Do not try to replicate what you will see in this video without the proper training
00:12or safety precautions.
00:14To make the condenser coil, we'll use a quarter-inch copper tube, 1.2 meters long.
00:21We'll need this paint can to shape the coils.
00:28We'll make three elongated coils like this, and we'll cut off the excess tubing.
00:45This is how it should look.
00:47We'll continue building the evaporator.
00:50For this, we'll also use a quarter-inch copper tube, 3.5 meters long.
00:56In this case, we'll use the same paint can, but we'll make the coil completely circular.
01:05This coil will be the part of the system responsible for generating cold.
01:11We'll bend the ends like this to connect them later.
01:16We're going to use this small piece of 3 1⁄8-inch copper tubing to make a check valve.
01:24This will be the charging valve for our cooling system.
01:28We'll remove the valve core so it doesn't burn when we solder it.
01:35We carefully unscrew it and remove it.
01:51Since this cooler uses a flame to operate, we must solder the joints by heating with MAPP gas,
01:58and using copper and silver brazing filler rod.
02:10Once welded, we mark here.
02:15We drill with a small drill bit, and now we enlarge the hole with a quarter-inch drill bit.
02:37We file down the burrs.
02:48Now we're going to weld this small quarter-inch tube into the hole.
03:13The valve will be welded to this end of the evaporator coil.
03:19We cut this tube a little.
03:32With the drill and a countersink, we'll reshape the tube hole this way.
03:42This is a steel ball from a bearing.
03:44It measures 6 millimeters in diameter.
03:48It must sit perfectly on the tube hole.
03:58This valve will work as follows.
04:01It will help the gas to always flow in this direction.
04:06When the gas arrives from the evaporator, the pressure it generates will lift the ball and allow passage to the
04:13outlet tube.
04:15The gas cannot flow in the opposite direction because the ball will obstruct the passage to the evaporator.
04:44We weld here.
04:50And once welded, we check that the ball moves freely inside the check valve.
04:59With this piece of copper tubing, 22mm in diameter and 100mm long, we'll make the tank.
05:05We put these two caps on the ends.
05:10We need to make two holes, one here, and the other here.
05:21We mark them, and drill with a ¼ inch drill bit.
05:39We remove the burrs from the holes.
05:47We have to empty any remaining shavings from the circuit.
05:55The tank is now ready to be soldered.
06:00We must insert the valve's outlet tube into this hole in the tank.
06:08We heat it with a torch.
06:12And we solder the cap and the valve tube.
06:22Now we place the condenser in position.
06:31And we solder it.
06:43Since the entire surface is quite burnt, we're going to polish it with very fine sandpaper.
06:55It looks very nice, doesn't it?
06:57Let me know in the comments if you like its appearance.
07:08Now we bend the condenser tube like this, and the evaporator tube, and we align both tubes.
07:25This piece of tubing, 12cm long, has a hole 0.6mm in diameter.
07:31We'll make the capillary tube with this very thin tubing.
07:36We'll use a pen to shape it into a spiral, and bend the ends like this.
07:49It should look like this.
07:50It should look like this.
07:53Now we're going to connect it to the ends of the condenser and evaporator.
07:58We'll flatten the ends slightly to secure the capillary tube.
08:05Since it's such a thin tube, we need to be especially careful when soldering it so it
08:10doesn't melt.
08:18We'll polish the solder joints again.
08:23And our refrigeration circuit is finished.
08:29We've prepared this wooden base to mount it on.
08:39We'll screw this wooden support in place with these two screws.
08:57We'll also attach this stainless steel plate here.
09:10We'll use these clamps to secure the pipes.
09:33We place the cooler in its position, and it fits perfectly.
09:39Now we replace the Schrader valve on the gas recharge valve.
09:50Finally we'll use isobutane gas as the refrigerant.
09:56We'll charge it by pressing it against the filling valve.
10:02We close the valve.
10:06This small candle is all we need to operate the system.
10:11our refrigerator is now ready.
10:34It's very important that the tank is slightly tilted so that, as it heats up, the gas flows
10:40towards the condenser.
10:42This end is slightly higher.
10:47To test our cooler, we place and light the candle.
10:54As the gas heats up, it will generate more pressure within the system, which will push the ball down, preventing
11:00its passage.
11:01Therefore, the gas can only flow in this direction.
11:04It will pass through the condenser, and upon reaching the capillary tube will undergo significant compression due to its narrowness.
11:11Upon reaching the evaporator, the gas will expand rapidly causing intense cooling.
11:16The cold gas will then pass through the entire coil, and upon reaching the valve, it will push the ball
11:22upwards, allowing passage to the tank, where the cooling cycle will begin again.
11:30Today, we can see a similar system in refrigerators that run on butane or propane.
11:41In just two minutes, we can see frost forming in the circuit.
11:49It's real ice.
11:50Here you can see how it melts due to body heat.
12:03It generates an extreme cold of minus 17 degrees Celsius.
12:13And now for the final test.
12:15Will it cool a can of soda?
12:30We wait a few minutes while the cold takes effect.
12:32We wait a few minutes while the cold takes effect.
12:54And our drink will be perfect for a hot day.
13:09When we blow out the candle, the flame goes out, and the system slowly defrosts.
13:20If you liked this video, give it a like and comment where you would use this refrigerator.
13:27Thanks to all our members.
13:28Remember that you can join to support our videos.
13:43Remember that you can join to support our videos.
13:45Bye-bye.
13:45Bye-bye.
