How to make a camping refrigerator. How to manage in a country house without a refrigerator

A portable refrigerator is a very necessary and convenient thing, which can help out on a long trip, on the beach, or on a hike. More than once we had to regret his absence, but somehow we managed to buy everything - there were always more important expenses.

And it’s good that you didn’t buy it, because you can make a cooler bag with your own hands, spending very little time on it. At the same time, the costs will be several times lower, and there will be more ease of use. Because both the shape and size can be made “to suit you”.

How to make a thermal bag and car refrigerator

One mini-fridge is not enough for our family. You need at least two. One in the form of a small bag - for hiking and cycling trips into nature. And the second one is in the form of a convenient and quite spacious box - for long trips by car.

It’s necessary, so we’ll do it.

Option 1. Cooler bag for carrying by hand

For those who know how to hold a needle in their hands or are intimately familiar with sewing machine, sewing a cooler bag with your own hands will not be difficult. I don't have such talents. The most she can do is sew on a button. Therefore, I was looking for a master class where this skill, if required, was purely symbolic.

And I found it. True, to make a thermal bag, you first need to find a ready-made bag the right size, but there will be no problems with this.

Besides this, you only need foil insulation and tape. And more advanced craftswomen can still arm themselves with sewing accessories and provide the product with additional fasteners - Velcro or a zipper.

• Folgoizolon- this is insulation, foamed polyethylene, covered on one or both sides with a thin layer of metallized foil. Double-sided holds the temperature better, but single-sided will do. You can buy it at any hardware store, the price depends on the thickness and is 50-100 rubles per square meter.

• Scotch you can take any - regular, foil or double-sided. When you read the description, decide for yourself which one will be more convenient for you to work with. But foil is still better - it reflects heat.

• Bag. You need to select it before you go to buy insulation in order to determine its quantity. You can take any bag depending on your needs - beach, shopping or sports. Preferably with a lock. Remove the pattern from it and calculate how much foil isolon you will need. For example:

Now see how to make a cooler bag with your own hands:

Image	Description
	Step 1 We buy the required amount of insulation. The thicker it is, the better our refrigerator will “work”.
	Step 2 We transfer the pattern to foil insulation, reducing it on all sides by a couple of centimeters. This is necessary so that the foil bag turns out to be slightly smaller than the main one and is easily inserted into it.
	Step 3 We cut out the parts and fasten them together with tape. We make sure that they fit tightly and without gaps to each other. Don't forget that the foil layer should face inward.
	Step 4 You can first “make” the joints with a stapler, pins, threads - whatever is more convenient for you. To make them airtight, we cut out strips from the remaining insulation and glue the joints on the outside again.
	Step 5 The lid can be made a little larger than necessary so that when closing the refrigerator, the allowances can be tucked inside. But it is better to sew on a zipper or Velcro.
	Step 6 The DIY thermal bag is almost ready. All that remains is to insert the resulting “fur coat” inside the bag-cover, and fill the space between the walls with any warm material- padding polyester, batting, scraps of an old blanket, etc.

This is the easiest way. If you're not too lazy, you can fit it exactly inner part to the outside and glue or sew it inside. In this case, the lid of the bag must be equipped with a zipper, and a valve is sewn on top of it so as not to let the cold out through the lock.

This is how you can make a cooler bag in just half an hour. Moreover, any crooked person like me can cope with this matter.

Option 2. Car refrigerator

On long trips or during multi-day vacations as “savages,” keeping food chilled, much less fresh, is not so easy. For such cases, you can make a refrigerator box from polystyrene foam with your own hands.

The most important thing is that you can choose the size yourself. If you want, make it small, just for storing water or beer. If you want, for the entire trunk, and then you can take with you a large supply of food, and even raw meat for barbecue.

And it will still cost mere pennies, because you need very little for a cooler bag:

• The basis. It could be a plywood box, cardboard box or Plastic container with smooth walls.
• Foam plastic or penoplex. The first one is cheaper, but crumbles when cut. The second one is more expensive, but denser, and it is easier to cut blanks from it. And both are incredibly lightweight and have high thermal insulation properties.

• Folgoizolon. We are already familiar with this material.
• Scotch, preferably metallized.

Manufacturing instructions:

Image	Description
	Step 1 We select or knock together a box of the required size from plywood.
	Step 2 We cut out five parts from foam plastic for the bottom and walls so that they fit snugly against the walls of the box and fit well together. This will be easy to do - polystyrene foam can be cut perfectly with a regular knife. You can seal the joints with tape.
	Step 3 We line the inside of the box with foil insulation, securing it with double-sided tape or a furniture stapler.
	Step 4 We tape the joints and the upper perimeter of the thermal box with tape. If desired, it can be covered with isolon on the outside as well. In this case, the insulation must be placed with foil “outside”.
	Step 5 We insulate the lid in the same way. The size of the polystyrene foam rectangle should be smaller than its plywood part and fit tightly inside the box to make the thermal refrigerator as airtight as possible. The lid can be screwed to the box on hinges, but this is not necessary. It is enough to make a convenient handle for opening.
	You can make a thermal refrigerator with your own hands from an ordinary box. And even without a base - just made of foam. Just remember that to glue it Do not use glue that contains acetone.
	Step 6 Not required. But if this is not difficult for you, then sew a durable case with handles. Especially if the box is covered with foil insulation on the outside. This will protect the insulation from damage and increase the usability of the refrigerator.

Such a thermal box by itself, of course, will not cool food and drinks. But it will be able to keep them fresh and cold for a long time. Which one depends on the thickness of the insulation, the quality of the “assembly”, the amount of contents, the temperature outside and other factors. But 12 hours is the minimum.

Cold accumulators

The cold will stay in the device you made much longer if you put something well frozen in it along with the food. And it is advisable to always have this something at the ready. After all, you won’t be carrying around a piece of frozen meat to cool your beer.

Therefore, at the same time as the thermobox, you need to make cold accumulators for the refrigerator bag with your own hands. You can also buy them. And in some household refrigerators they are available in the form of flat plastic flasks with a narrow neck and lid.

But making them is not a problem, so choose which method suits you best.

Liquid batteries.

These are bottles, rubber heating pads or plastic bags with a sealed Zip Lock fastener, filled with ice. Bags are more convenient, they take up less space and they can be filled with pre-frozen ice cubes.

Due to their shape, plastic bottles are not so convenient and practical; water must be frozen directly in them.

By the way, if you dissolve salt in water before freezing, such ice will melt much longer. The proportions are any, usually salt is poured until it stops dissolving.

Gel batteries.

They are more convenient (less risk of leakage) and hold the temperature longer than water ones. You can make them in two ways:

• From baby diapers. It’s very simple: pour water into the diaper until it stops being absorbed. If desired, it can be tinted with watercolors. We don't wait long and cut the diaper with scissors. We take out the swollen gel contents, put them in a tightly closed bag and freeze them.

• From gelatin or wallpaper glue. Dissolve as much salt in a liter of water as will dissolve, and then add another 3 liters of water. Pour gelatin or wallpaper glue into the resulting solution. Take the proportions indicated on the package. Dye - optional. All that remains is to pour the liquid into bags or bottles and freeze.

After each use, refrigerants should be placed in the freezer and kept there until the next time.

How to Make Your Homemade Cooler Bag More Efficient

Now you know how to make a thermal bag with your own hands and save a lot of money. Information on its effective use will also be helpful.

• Traveling by car, wrap the bag additionally in a piece of foil or just in a blanket.
• Try to hold it in a place where there is no direct sunlight.
• Cold accumulators It is best to place it on the bottom. And if there is space, you can use them to transfer food.
• It is advisable to fold the products themselves cooled into a thermal bag.
• The more tightly they are packed, the slower the refrigerator will heat up inside. Therefore, the remaining space needs to be filled either with ice packs, or with a rolled-up blanket, blanket, or just empty bottles.

• Try to open the bag as little as possible.

These simple steps help to significantly slow down the process of thawing and heating food. Sometimes they remain cold for two or more days.

Conclusion

Have you already decided what you need more - a portable bag or a large thermal box for travel? Or maybe both? In any case, now you don’t have to run around the shops looking for the right thing, but make it yourself in a couple of hours.

If anything is unclear in this description, watch the video in this article. But it’s unlikely that making a cooler bag seemed like a difficult task to anyone. And probably among the readers there will be those who have already solved it a long time ago.

If so, please show your creations in the comments with a description of the “production process”.

Almost every weekend we go with friends to nature with an overnight stay. To be more precise, we go to the beach, to the backwaters, which is near the village of Padovka. The holiday is excellent, needless to say: here you can swim to your heart’s content, have a barbecue, and cook some dish over the fire. But due to the insane heat, there is a terrible problem with cold beer. At the end of June, we put all the beer in a bag and threw it along with the anchor 10 meters from the shore (luckily a friend has a motor boat), but this did not provide any salvation. Judging by his echo sounder, the water temperature on the surface last Sunday, July 25, was 29 degrees Celsius, well, at the end of June it could be 27 degrees (I won’t lie - I didn’t remember); In general, this is death for beer.

We began to think about how to overcome this problem. Last weekend I dug a hole, like a cellar, and we froze the beer in the freezer in advance, plus the entire supply of water. We went for two days, and at lunchtime on Sunday the water was a little cooler, which, in general, was also pleasant (we naturally destroyed the beer on Saturday evening, and the taste of the beer after freezing, unfortunately, did not change much better side). I first lowered a large box into the hole, and when they stuffed it with provisions, they covered it on top with a couple of sleeping bags for safety. Of course, it is more correct to dig a hole around the cellar around the circumference and place a car inner tube there, cut along the circumference. Next, you should pour water into the auto chamber and cover the cellar with a rag, and all edges should lie in the water. Water, evaporating from the rag, takes heat from the cellar, and the supply of cold, which is prepared in advance, lasts much longer. I read this trick in some magazine back in the 80s of the last century. Unfortunately, experience this design It didn’t work out for us, because no one had an unnecessary camera, and there was no point in simply pouring water into the dug hole, since the soil was entirely sandy. If anyone tries this design, please leave a comment.

But just last weekend we were faced with a task of the greatest difficulty: we had to go on vacation with two overnight stays. In addition to all this, they celebrated a birthday, so the supply of beer was doubled. We got out of this predicament quite easily. I arrived at the site first, dug a hole one meter long, half as deep and half as wide. I lined the inside of the hole with foam plastic 30 millimeters thick, for which I spent 90 rubles, and laid in provisions and drinks, pre-cooled (and frozen water). And most importantly! A piece of dry ice! So, thanks to him, we drank cold beer on Sunday and added unsour milk to our coffee.

Now for those who don’t know where to buy dry ice. The address of this company is Zavodskoye Shosse, 8. It turns out that if you drive along Zavodskoye towards the city and turn onto the 22nd Party Congress, immediately after the stop (before reaching the Pobeda shopping center), there will be an inconspicuous passage, so that’s where you go. When I bought ice, I looked at how they work. On weekdays, like all people, and on Sunday and Saturday only from 10 to 12. This office is called City LLC, and this is their phone number, just in case, 992-69-68. Now about prices: a whole beam measuring 18*18*90 cm costs about 900 rubles. This timber is sawn, and the smallest piece, 7 centimeters thick, will cost you 107 rubles. I bought a larger piece, for 239 rubles, it was the size of my cooler bag (pictured), I put it there, and for safety I also put the bag in a box and in a blanket. I bought it at about 13:00 on Friday, we were at the river at 18:00. My ice “lost” a little during this time, and by Sunday morning there was no trace of it, but I crushed this piece in order to pour the ice into containers that My friends bought it, but more on that below.

In general, what can I say, containers are made of polystyrene foam, tightly closed with foam lids, very similar to cooler bags, only without plastic cases and not covered with any fabric. But the price is attractive: 40 liters costs only 170 rubles, and the smaller one costs 150 rubles.

The only drawback, in my opinion, is that you can’t stand a 1.5 liter bottle while standing. The containers were purchased in a store located in the building soft roof at the address: st. Belgorodskaya 1, building 5. This is right under the South Bridge; tel. 261-60-60. Well, I think that the information will be useful for someone, so I bow out and wish everyone to drink only cold drinks in this heat.

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You took beer with you on your hike, but there wasn’t a stream with cold water along the route, and the cold ended. How to quickly cool beer or other drinks, and not by a couple of degrees, as is done through evaporation, but in such a way as to actually cool the drink and enjoy the heat? To do this, you need to take with you an extremely compact chemical refrigerator, which you can prepare in advance and always have the necessary charge on hand for cooling food, freezing bruises and other needs.

Cold will help with: bruises, sprains, fractures, dislocations, swelling, burns, insect bites, heat stroke, the occurrence of inflammatory processes, the need to stop bleeding (from the nose), the need to cool foods.

Method for producing chemical cold

To prepare it you need water and ammonium nitrate- a common fertilizer. You can easily find it in flower shop, its price is low, so your emergency refrigerator will be cost-effective.

The mass proportion of water and nitrate is 60% to 40%, by volume it turns out to be 1:1. Stir this mixture in the bottle. When dissolved in water, saltpeter absorbs a large number of heat. If salt, when dissolved, lowers the temperature by 3 degrees, then the same amount of saltpeter will lower the temperature by 23 degrees! Fridge chemically ready to use. If you freeze a half-filled bottle with water and then fill it with saltpeter (grinding is not necessary), you will get a long-lasting source of cold.

Another great idea. While camping, you can make a cooler out of a camping mat and a bottle of formula. At the right moment, we activate the mixture and wrap it in a mat, and cover the open ends with a rag or spare clothing.

The used mixture must be greatly diluted with water before pouring it out if you do not want to harm the plants.

About a thermos, how to make one from a bottle.

Experiment with chemically generated cold

Mix 100 g of snow or ice with 33 g of rock salt - the temperature of the resulting mixture will drop to -20 ° C. If you mix 100 g of snow or ice with 100 g of potassium nitrate, the temperature of the mixture will drop to -30 ° C. The temperature of the cooling mixture, consisting of 100 g of snow (or ice) and 150 g of potassium chloride hydrate reaches -45° C. But what about in the summer, when there is no snow and ice? In the warm season, you can use chemical compounds that, when dissolved in water, absorb heat, thereby helping to reduce the water temperature to -35° C. Of course, the water must be cold, and the compounds listed below must be taken in the following proportion(by weight) relative to water:

ammonium chloride 3
sodium nitrate 5
ammonium nitrate 10
sodium sulfide + hydrochloric acid 40
ammonium or potassium thiocyanate 15

To avoid large losses of cold, it is advisable to prepare the solution in a thermos.

When finished, pour the solution into a cup and remove the water from it by evaporation. The substance remaining after evaporation can be used again for experiments.

Do-it-yourself refrigerator for a car (3 options, photos, step by step)

Option #1. Do-it-yourself passive thermos

I don’t know if I chose the right section, but I decided that this topic would be appropriate here. I invite everyone to share their HOME MADE experience here...

This year we will definitely go to the sea. It is better to keep the “brake” and drinks in the cold to prevent them from spoiling. And for this you need a refrigerator. Buy a car refrigerator from a cigarette lighter for 4,500 rubles. “toad” doesn’t give me any. Therefore, also for old car, it was decided to make a new, major refrigerator with “cold accumulators” in the form of frozen one and a half buckets of water. Old refrigerator made from packaging cardboard, it lasted 3 trips to the south, and was mercilessly thrown into the trash (I attached a photo below (not the trash, but the refrigerator)).

So, what was done and how. The size of the refrigerator was chosen 400*400*300 mm, based on the size of the trunk in the previous car (too large would take up a lot of space and there would be nowhere to put things).

I decided to insulate, or rather thermally insulate, using foam insulation with foil on one side, 10 mm thick. Width 1.2 m, length 1 m. Price today is 90 rubles/1 m.

The body material was waste from our furniture production- MDF (or, to be clearer, fiberboard) 10 mm thick. Purchased 2 aluminum corners 15*15 mm for 120 rubles. for both. Also purchased were rivets 4*16 (100 pieces - 50 rubles) and 2 furniture bar hinges for 30 rubles each. each. That's all the expenses - 295 rubles. Tools and equipment were borrowed from work (where the refrigerator was assembled).

Cutting off the corners in place, we slowly begin to assemble the box of the future refrigerator.

As a result of the “titanic” labors we got this nice little box.

I installed a snap lock and a folding wire handle on the lid of the box. So that the finished refrigerator along with packaged food can be carried in your hand. Otherwise, full of water and food, it becomes very heavy! But, as they say, you don’t carry your own burden...

Now we proceed to pasting the inside of the box with insulation. I decided that the bottom and lid would be covered with 2 layers of insulation, and the walls with 1 layer. I used liquid nails for gluing. Having smeared the insulation blank with “nails,” I glued it to the wall and pressed it down with a weight. It stuck well, but then I tried to tear it off - the glued seal did not give in.

As a result, after 3 days of working in my free time from my main job (of which there is not so much), I got this nice refrigerator with a hinged top lid with a latch.

4 and a half will be fixed or placed in the corners or on the bottom liter bottles with water, or 6-8 half-liters, previously frozen in the freezer. Can be used mineral water, cold, but with gas, in the heat it’s so invigorating. It is better to take half-liter mineral water, this volume is the most practical. Bottles are not filled with water full, otherwise, when the water freezes, the ice will expand and tear the bottle, and the food will float in the thawed water. To save space in the refrigerator, you can buy a branded “cold accumulator” in the store - these are special bags or flat boxes with liquid inside, which are used instead of bottles (one large one costs about 120-150 rubles). Only bottles with spring water are free! And even when the water in them begins to melt (and this happens in about a day), it can be used for cold washing or drinking.

Using the previous cardboard refrigerator, food and drinks not eaten or drunk along the way reached the sea cold. We even brought our own ice in the new refrigerator at sea, but it didn’t melt completely! This refrigerator can also be used as a stool. I didn’t paint it on purpose, so that it would be visible if something happened to the MDF (for example, if it started to warp from water). I am completely satisfied with the refrigerator; it justified the time and small money spent on its production. And there are a lot of benefits from it!!!

Option #2. Do-it-yourself passive thermos

I’ll say right away that this thermos auto-refrigerator was invented by my friend Valera!! For which we are very grateful to him. He lives in the south, it’s hot here, so there’s a catastrophic shortage of auto-refrigerators for food on vacation, especially if we’re traveling. big company. Valera made such a thermos auto-refrigerator with her own hands several years ago, so she decided to do something similar.

In total, having bought a box for children's toys- 350 rubles, 2 sheets of polystyrene foam 2x50 rubles=100, 2 two rolls of metallized tape 2x100+200, universal glue 80 rubles, mounting foam 120 rubles TOTAL 850 rubles and 2.5 hours of my precious time.

Two days later, compote from a thermos on the Dolzhanskaya Spit, about 40 degrees outside, the flight is normal:

Option #3. Do-it-yourself active refrigerator based on a Peltier element

Consumables:
1) Peltier element (rarely used for cooling computer processors)
http://www.ebay.com.au/sch/Industrial-/170769/i.html?_nkw=Peltier&_catref=1&_fln=1&_trksid=p3286.c0.m282
http://ru.wikipedia.org/wiki/Peltier_Element
2) Old ESKY box
3) A pair of radiators from computers
3) Wire and crap into the cigarette lighter.

Prelude:
One boring evening, I was gently putting computer jewelry from one place to another.
As fate would have it, Peltier elements ended up in one hand and radiators in the other. And providence had to happen, the old ESKY caught my eye.

In general, after the beer garden a crazy thought came to mind. Make a refrigerator out of computer junk.

Two radiators were taken and holes were drilled. I made a hole in ESKY for the radiator. I bolted everything together and what happened was what happened. A CPU cooler is installed outside, with inside natural convection.

Pros = 1) it works.
Cons = 2) one element is too small. 3) the cigarette lighter gets hot. 4) During operation, the element not only moves heat from the inside to the outside, but also generates heat itself. That is, (suppose) when the temperature of the internal radiator drops by two degrees, the temperature of the external radiator increases by four, five degrees.
... there was something else, I don’t remember now.

Conclusions:
The elements should be placed on the lid (easier to install, the cold will go down on its own).
You need several elements for at least some cooling.
Use either crocodile clips or T-shaped sockets. The cigarette lighter area is too small for this (which is what causes heating).
Radiators are needed much smaller in size (2/3 definitely need to be cut down), a thinner and wider monoblock should be used (and if it’s also copper...). Well, I used what I came across, my own.

All in all. It was pilot project, everything will also be finished off in the future for capacity.

Advice: It is necessary to combine the efficiency of an autothermos and Peltier elements instead of or in addition to cold accumulators.

1. Cool off in nature

2. Making a cabinet for the refrigerator

3. Disguise the refrigerator as a cabinet

We “always lack something: summer in winter,” and coolness in summer. They escape from the hot sun in the shade or in the water of the nearest reservoir. To prevent food from spoiling due to the heat, people came up with a wonderful household appliance -.

Electric refrigerators are found in every home. Their disadvantage is that they are cumbersome and that they are tied to the network. But how to support low temperature food on the road, on a picnic or at the dacha, wherever there is no access to electricity?

Although there are various portable and portable miniature refrigerators available on the market, House master He can easily handle the problem on his own. A DIY refrigerator is a justified and effective solution in many situations.

Cooling off in nature

Let's start with the refrigerator, which is not really a household appliance, but rather an advice on how to quickly cool bottled drinks in hot weather. Very often, somewhere on the beach you can see how bottles of beer or other drinks are carried to a pond in the hope of cooling the drinks in it.

In fact, the effect of such cooling is minimal. Unlucky beachgoers blame the weather, saying the water is too warm. But the real reason is that they don't know physics well.

Water cools as it evaporates. Therefore, you don’t need to carry bottles anywhere, you need to soak a napkin in water, wrap the bottle of drink in it and leave it alone, preferably somewhere where there is a slight air movement; you don’t even have to hide it from the sun.

On a trip wrapped in damp cloth You can stick the bottle out of the car window, holding it in your hand. A few minutes is enough for the drink to become significantly colder. Keep in mind that your hand will also be cold.

A camping refrigerator works on a similar principle—cooling by evaporation of water—which is used when going fishing or on a picnic for several days.

To store food, use an airtight container with a lid. You can buy suitable ones or make them yourself from metal.

They dig a hole under the refrigerator somewhere in the shade. A container for food is placed at the bottom of the hole in the center, and a cut inner tube is placed around it and water is poured into it. Cover the container with food with a wet cloth, the ends of which are dipped in water.

Water is absorbed by the fabric and evaporates, the container and food are cooled. The refrigerator runs until the water runs out. Its supply is replenished as necessary. Instead of a camera, you can use a suitable size with low edges. An improved version of the described design can be used as a stationary refrigerator in a country house, where the owners come occasionally and do not risk leaving an electric refrigerator unattended, or if there is no electricity. summer cottage

only “in the project”. Considering that the structure will not have to be transported, the volume of the refrigerating chamber can be chosen larger, for example, used for it steel barrel

or even one that has served its term.

The barrel is buried in the ground almost to the entire height of the wall, leaving 5-10 centimeters outside. A round hole is left around the neck of the barrel, large enough to accommodate a trough of water. It can be arranged from the same car camera or Another one important detail

of such a refrigerator is the evaporator cover. It consists of two parts, a solid lower one, and an upper one, in which many holes are drilled. Between the two parts, place a layer of porous material that can absorb water, for example, batting or dry moss.

Water is absorbed by the layer and evaporates through the holes in the top of the lid, simultaneously cooling the lid and inner space homemade refrigerator.

Those who doubt the functionality of the design can first try a simplified version. There is no need to look for a barrel somewhere and install it, just dig a round hole 50-70 centimeters deep and cover the walls and bottom with film, and make a ledge in the wall for a gutter with water.

An ordinary household refrigerator consists of two parts, a thermally insulated refrigeration cabinet and a cooler located in it, i.e. a source of cold. The efficiency of a refrigerator depends on the ratio of the two components, on how much external environment internal space, and how well the cooler produces cold.

If sufficiently cold food is available, for example previously frozen in freezer, their temperature will remain unchanged for quite a long time, tens of hours, if you provide good temperature.

Making a cabinet for the refrigerator

A cabinet for a homemade refrigerator can be made from anything, or use suitable container available. This could be an ordinary sports bag, a hand-made aluminum box to the required dimensions, an unnecessary bedside table, or even a simple one.

To reduce heat exchange with environment The shape of a homemade refrigerator should be as close to a cube as possible. But the most important thing is to take care of thermal insulation, seal the cracks and line the walls with an effective insulator that does not let the cold out.

When choosing a thermal insulation material, they take into account not only its “direct responsibilities”, the ability to retain heat, but also operational features. For example, for a stationary aluminum box, a fragile one will do, but if the master’s goal is a camp refrigerator in a sports bag, then it is better to use soft materials.

In addition, the refrigerator is usually used to store food, which means hygiene and sanitation must be taken care of. From these positions for interior decoration For a homemade refrigerated cabinet (chamber), it is preferable to choose foil insulation, which is easy to clean. For example, foil foamed polyethylene.

The thicker the layer thermal insulation material, the better the refrigerator “holds” the cold. Obviously, to increase efficiency, multiple layers can be used, including those made from different materials.

For example, sew or glue the inner chamber from foil, and fill the free space near the outer walls with foam plastic or mineral fiber. The number of layers is within reason, otherwise there will be no room left for food.

"Factory" household refrigerators They are often made vertical, so it is more convenient to use them. But in terms of efficiency, it is preferable to a design with a well-lapped lid on top.

Electric household compressor refrigerators use a part such as an evaporator as coolers. Inside the evaporator, as the name implies, evaporation of liquid refrigerant occurs, which is accompanied by the absorption of heat from the surrounding space - the release of cold.

Replace the evaporator of an electric refrigerator in homemade designs can “replaceable elements”: containers filled with water, or even better with salt water, such as plastic bottles or rubber heating pads.

Pour salted water into containers (about 4-6 tablespoons of table salt per liter of water) and place them in the freezer for a while until the water freezes. Salt is needed to lower the freezing point.

In a homemade refrigerator, containers with ice play the role of cold accumulators. Once upon a time, until electric Appliances, companies that harvested ice in winter and sold it in summer flourished. Electric refrigerators are undoubtedly more convenient and efficient, but in some cases it is useful to use centuries-old cooling methods.

Masking the refrigerator as a cabinet

IN winter time, especially immediately after the end of the holidays, student dormitories can be unmistakably recognized by bags and nets sticking out of the windows. In this way, students store temporary “surplus” products that compassionate parents provided to the “poor child.”

With a little effort, it is easy to set up a more or less civilized winter homemade refrigerator right in the room. The principle is the same as for any refrigerator. First you need to equip an efficient refrigeration cabinet, isolated from the environment.

Since the refrigerator will be in a living room, it is advisable to “disguise” it as furniture, for example, insulate it with improvised material, foam rubber or cotton wool, or some kind of bedside table. The source of cold inside the bedside table will be the influx of outside cold air.

To do this, the bedside table will need to be equipped with two corrugated flexible plastic pipes. Cold air from the street will flow into the refrigerator through the inlet pipe, so that after cooling the food, it will go outside again through the outlet pipe.

Air movement in the pipes will be provided by a fan (or better yet, two, one for each pipe), which can be used as a computer cooler. Five volts can be supplied to the cooler from any USB source, or you can use the power supply of the same old computer from which the cooler was “torn out”.

How to take the pipes out? It all depends on local conditions. On the top floor you can use ventilation duct. The “standard” solution is to cut a hole in or replace the glass with transparent plastic, which is easier to cut holes in. Of course, both the pipes themselves and the place where they enter and exit into the room will need to be well insulated.

With the onset of summer, so that the dorm commandant does not worry, it is better to remove the pipes and return the “standard” window glass to its place.

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