The master who built this refrigerator is an electronics engineer with a varied range of hobbies, from history to sports, from law to travel. The master's latest hobby is making wine at home. And this is where his engineering knowledge came in handy. Not for making wine, but for storing it.
Wine should be stored at low temperatures of 10 to 18°C maximum, and refrigerators for it proper storage roads. Then the master decided to make such a refrigerator himself.
Tools and materials:
-Extruded polystyrene foam;
-Aluminum tape;
-Roulette;
-Glue;
-Knife;
-Pencil;
-Aluminum profiles;
-Aluminum radiator;
- Fasteners;
-Drill;
-Peltier element;
-Textolite;
-Fan;
-Controller for powering the Peltier element;
Step one: refrigerator requirements
When designing, the master tried to take into account the following requirements:
-The temperature inside the chamber is not higher than 18°C
-Low power consumption 15-20 W
-Work on the Peltier element
-Controller with a system for monitoring and controlling the set temperature
Step Two: Case Design
When posing the question of what to make the body from, the master settled on penoplex. The master explains his choice of material due to its low thermal conductivity, moisture resistance, strength, and ease of processing.
For the refrigerator, the master used slabs 4 cm thick. Inner dimensions refrigerator 380 x 360 x 320 mm. This refrigerator can accommodate four five-liter bottles of wine.
Step three: making the camera
The craftsman took the foam sheet to a furniture shop and there it was cut to size. The master assembles the camera using glue.
After assembling the camera, he covers it with aluminum tape.
Step four: cooling unit
The design of the cooling unit is simple. As we know, when voltage is applied, one side of the Peltier element cools, the other heats up. Therefore, placing the element inside the refrigerator is ineffective. The master places the element on the outside with the cold side towards the internal radiator, and the hot side towards the external one. A fan is installed below the element. The design is visible in the photo.
The master installs the internal radiator at the top of the chamber, this is due to the cold air falling down.
Step Five: Controller
The controller has the following parameters: measuring and adjusting the temperature with an error of 0.1 degrees in the chamber, limiting power consumption, controlling the temperature of the external radiator and turning on the fan, continuous power supply to the Peltier element, smoothing out ripples and voltage surges.
The master emphasizes that the Peltier element works constantly, just with different power. This scheme will allow the element to work much longer. The controller diagram is located below, and you can get more detailed information
In this article, there is a model of a car refrigerator, which was made by the author of the channel, Alex Shev, with his own hands, despite the sophisticated nature of the resulting product, in just three days. The device operates on Peltier elements. Below, at the end of the publication, is another model that works on the same basis.
A number of materials and parts were used.
Work on the product
We cut the foam using a 1 kilowatt spiral and a 5 volt power source. The spiral was secured between the legs of the table. I glued the foam together with polyurethane foam. We cut grooves in the lid so that it does not fidget.
It was supposed to cover the tray with polystyrene foam, but it was easier to make a box out of it and use the tray to strengthen the strength of the car refrigerator. The dimensions turned out to be 38 X 30 centimeters, depth 28. Capacity: 3 bottles of 1.5 liters in a row. You can have two such rows, or 2 by 2 liters side by side.
We drill holes in two radiators for thermistors to control the temperature. In cold weather also for fastening. We cut a hole in the lid of the car refrigerator and heat the heat exchanger inward by 1 -1.5 centimeters. Next, using thermal conductive glue, we fasten the two Peltier elements to the radiators. One just fits two Peltier elements. The gap between the foam and the radiator is also insulated. In the example shown, bestizol was used.
We put it together, screw the fans onto the heat exchanger, install the microcontroller, LSD monitor, and relay. So far only using the hanging method.
Also check out the cool designs with free shipping in this Chinese store. There you will also find Peltier elements.
We are writing a program for a microcontroller. The author of this video tutorial used an insert to turn off Peltier elements when the temperature of a hot radiator is more than 55 degrees. And also when the temperature in the refrigerator itself is less than 5 degrees. Only the elements themselves are disabled. The fan and microcontroller continue to work.
The temperature is measured by an ADC converter: on a hot radiator, on a cold one, in the refrigerator itself. Shown on the display.
Power is supplied to the elements through an additional relay only when the ignition is on (engine is running), so as not to drain the battery.
When checking at home, the temperature in the car refrigerator dropped to 12 degrees in 1 hour and stayed there. The temperature of the hot radiator stopped at 49 degrees. In the car, when cooling 4 bottles of Mojito and using Peltier cold accumulators, the Peltier turned off in the first hour at 55 degrees of the hot heat exchanger. And subsequently they turned off when the temperature inside was less than 5 degrees. Operation interval: 4 minutes on, 1.5 minutes off.
Conclusions:
Do-it-yourself car refrigerator-thermobox
Greetings, dear readers! Since my family and I travel a lot in the summer and regularly go out for barbecues, the issue of food storage came to the fore. Both on long trips and for one day. 
It became clear that we couldn’t do without a refrigerator or a thermal bag. Familiarization with the market has begun. The simplest thing is thermal bags. We will not consider thermal packages. They are soft, take up little space, light, and the cheapest. The downside for me is that there is fabric and seams inside, which is inconvenient to wash. Average price 500-1000 rub. Thermal containers. Hard plastic body, easy to clean. Cons: They take up space regardless of whether there is food inside or not. Average price from 2500 rub. 
Both bags and containers require cold storage batteries. Refrigerators with Peltier elements are the same thermal containers, but with a cooling system built into the lid. Depending on the power of the elements, it can cool up to 20°C from the outside temperature. Nutrition from electrical network car. Minus - if it is not equipped with a shutdown system, it can drain the car’s battery. Average price from 3500 rub. Compressor car refrigerators. The most serious of all. Designed for long trips. They can operate on both electricity and gas. They cope with their responsibilities perfectly. The downside is that they cost the same as two regular home refrigerators. *** I looked at all this and decided, in order to understand what I needed, to make a refrigerator with my own hands.
Well, to be more precise, a thermal box. For me, the main thing is that condensation does not drip anywhere and the food does not get choked on the road. I took a sheet of penoplex (the insulation is orange). Cut it out. Assembled using self-tapping screws and sealant. There are no corners, no insulation on top, no upholstery or painting. Everything is “as is”. Why complicate things? 
Photo by the channel author. Cutouts were made at the joints of the walls and on the roof to reduce heat loss. Conducted sea trials under load. Considering that the lid is solid, that is, every time you open it, it gets into the container. warm air, boxing performed well. The cold lasts for at least a day and a half (on one stack of cold accumulators), with regular openings. Watermelons, water, chilled foods, meat - everything feels great. In general, I left everything as it is for now; it suits my purposes perfectly. And it’s not a pity, if anything. Nothing is as permanent as something temporary. And you choose what suits you best.
Refrigerator made of polystyrene foam and Peltier modules
Today’s article is not about turning packaging foam into glue by dissolving it in acetone. Today we’ll talk about a homemade product that’s a little more complex, but very useful in the household, garage or home. Since our school days, we have known about the Peltier element, which, when some voltage is applied to it, emits heat on one side and cold on the other. 
The same element, 75 Watt. So, we will make a mini refrigerator, you can call it a tabletop one. And, to begin with, let's take thin packaging foam and use double-sided tape to assemble a box with a door from it. We take the size of the box approximately as a 5 liter water bottle. 
A box made of polystyrene foam. Next, we assemble the main part. Glue a small one to the cold side of the element using thermal paste. aluminum radiator from electronics. On the hot side we glue a processor radiator with a fan onto the same compound. 
The main unit of the device. Having cut a hole in the back wall of the box, insert it inside cold radiator and glue the entire assembly to the back wall. 
Back wall refrigerator. Connect the ends of the element and the fan in parallel, supply 12 Volts. We put a couple of cans of foam in our refrigerator. After an hour, drink the drink at a temperature of 15 degrees. 
Everything you need to know about auto-refrigerators for Fishermen and Autotourists
We offer an article on how to make a refrigerator with your own hands, having understood the principle of its operation.
The method of generating cold directly depends on the dimensions of the future device. At large sizes choose a circuit with freon, for small ones - electrical elements Peltier.
Important! At self-production Pay attention to the second option, implemented at home.
Next, we’ll look at how to make a refrigerator for your garden and car yourself, powered by 12 volt USB. What can you take from your computer or water cooler? How to assemble a body from sheet material? How are ammonia and trailer refrigerators made?
Operating principle and advantages of the Peltier cooling element
During operation of the Peltier converter, its two parts have different temperatures. When passing electric current through the cooler, heat is generated in the upper half, and cold flow is generated in the lower half.
Attention! You can purchase a cooling device in a store that sells computer components or radio parts.
The advantages of such a refrigerator include the absence of:
- moving elements;
- transported media;
- noise.
Instructions for assembling a thermoelectric refrigerator with your own hands
To make a refrigerator using Peltier elements with your own hands, check out step by step instructions. It describes the steps in detail and provides useful recommendations.
Materials and tools
To work you will need:
- expanded polystyrene. Suitable sheets with a thickness of 50 mm;
- Peltier element;
- radiators with coolers. Can be removed from old computer equipment;
- thermal paste;
- regulator with temperature sensor;
- polyurethane foam;
- wires;
- plugs for connecting to a USB car and/or socket;
- stationery knife;
- measuring tool and pencil;
- soldering iron
Housing assembly
To ensure the geometric accuracy of the refrigerator body, a template is made. Its dimensions must correspond to the required volume of the future device. The wine rack should be high enough to accommodate the bottles.
Attention! As a template, use a drawing of a box or box of a suitable size.
Drawn elements:
- cut to size using a utility knife;
- are connected to each other using polyurethane foam. To do this, elements with foam applied to their surface are connected and left in a stationary state until the composition dries completely. To enhance thermal insulation characteristics The walls are made double.
The assembled box is painted in the selected color in several layers.
To the inner surface refrigeration device glue the insulation with aluminum foil using liquid nails.
In the absence of sheets of extruded polystyrene foam, you can use:
- laminate. Special grooves facilitate the assembly of the structure. The material has sufficient strength;
- Styrofoam. Well processed cutting tool. Moisture resistant. A refrigerator made of polystyrene foam will cost less than its counterpart made of polystyrene foam;
- MDF or fiberboard. Additional processing will be required due to low resistance to moisture;
- plastic. Ready-made boxes with lids are preferred. A tool box or water cooler will do.
Installation of the cooling unit
To ensure the efficient flow of physical processes inside a portable mini-refrigerator, installation is performed in the following sequence:
- An aluminum profile is mounted perpendicular to the side wall of the box from the inside. It will be used to transfer cold to the interior space;
- to the fixed aluminum profile a radiator is attached from the inside, with the help of which the redistribution of cold air throughout the internal volume will be ensured;
- a Peltier element is mounted on the outside of the profile. It is better to avoid using adhesive sealants due to their low efficiency. Screws are preferred.
In order for the car refrigerator to provide the necessary temperature regime, three elements are used to cool the container. A computer block is used as a power source. If the refrigerator will be connected to a car battery, you will need an extension cord with a cigarette lighter connector. To regulate the temperature, a thermostat is connected to the refrigerator.
The installation of the Peltier element must be carried out in compliance with a number of rules. Necessary:
- Observe the polarity of the wires. Incorrect connection will result in inner part will heat up and the outside will cool;
- remove heat from the top in a timely manner by installing a cooler. Without it, the element overheats. The intensity of air flow exhaust determines the power of the system;
- securely secure the insulating gasket. Its characteristics determine the efficiency of the cooler;
- during installation, thermal paste should be applied between the parts of the element and the insulating plate;
- To distribute the cold evenly and quickly cool inside the container, another cooler is attached to the inner surface. It will also prevent condensation from occurring.
Other types of refrigerators
If you need a freezer, you should try to assemble a compressor unit. It is characterized by fast and reliable freezing. It is difficult to make such a device yourself. You must have certain knowledge and have a compressor, evaporator and condenser available. Such a unit can be installed in a car trailer when going outdoors.
There are absorption type devices. They include:
- a generator into which a mixture saturated with ammonia is supplied. After connecting to the power supply system, it boils;
- a condenser that removes heat outside the refrigerator;
- an absorber in which, due to the pressure difference, the ammonia-water solution absorbs ammonia vapor. The process is accompanied by the release of heat. To prevent overheating, it is cooled with water;
- an evaporator in which refrigerant vapor is released;
Thus, the simplest version of a refrigerator for a car is a device based on Peltier elements. This is the optimal solution in a situation where a travel thermos bag is not suitable. Camping, 12 volts, will be suitable option for a summer residence, if you provide a special adapter for 220 V.
Video: DIY refrigerator bag
It is best to make a car refrigerator with your own hands using Peltier elements. The design of such a refrigerator is much simpler than the usual unit with a compressor and freon as a refrigerant. Despite the fact that a compressor refrigerator has a higher efficiency than one operating based on the Peltier effect, the latter is preferable for use in cars. Since it has other important advantages: smaller dimensions and silent operation.
Compressor climate control technology is still used in cars, for example, air conditioning. This is explained by the fact that the air conditioner cools a large volume and cannot be made based on the Peltier effect. In addition, the air conditioner must remove heat from the car interior further than the design of the Peltier element allows. If you got the old one home air conditioner, do not rush to rejoice, since it is unlikely that you will be able to make a car refrigerator out of it.
Cooling without compressor
The Peltier effect is that when an electric current flows through the contact of two semiconductors with various types conductivity ( p-n junction) depending on the direction of the current, either cooling or heating occurs. This is explained by the interaction of electrons with thermal vibrations of the atoms of the crystal lattice. And when current passes through series-connected junctions, the thermal energy absorbed by one p-n junction is released on the other.
If you arrange the Peltier element so that one p-n junction is inside a container with good thermal insulation, and the other outside, you will get a small refrigerator that is sufficiently powered by a car cigarette lighter. Another refrigerator that operates without a compressor is absorption. You can make a refrigerator for your car from such an old unit. But in this case, the design will depend on what you got, so you will definitely need to change the heaters and thermostats to 12 volt ones.
Making the body
To make the case you will need materials:
One Peltier element will not be able to significantly cool a large volume, so for one thermoelectric element do not make the housing larger than 40x40x30 cm.
To cut hardboard, use electric jigsaw or circular saw, if they are not in your arsenal, an ordinary hacksaw with small tooth. From MDF sheets, using corners and blind rivets, assemble a box that will be the body of your mini-fridge. Place the corners from the inside so that the rivets are held more securely. Fill all cavities in the joints between structural parts with sealant. After the sealant has dried, cover it with inner surface the resulting box with insulation. Use “liquid nails” for this.
Apply foam rubber seal to the upper ends of the walls. MDF is very hygroscopic, so it must be primed before gluing the body. Instead of a primer, dilute a little PVA with water (add 2 parts liquid to 1 part glue). Prime the body, let it dry and cover it with oilcloth. Do not tape the door, as it is a radiator, and tape will worsen its heat transfer.
Cooler installation
For this you will need:
First you need to make two radiators from aluminum, mount a cooling element between them and separate them from each other with a sheet of thermal insulation. This design will double as the refrigerator door. With the outer dimensions of the case being 40x40x30 cm, the top radiator should be 40x40 cm, since it will cover the box, and the bottom one should be 38x38 cm, because it should go inside. Cut a 38x38 cm square from a sheet of insulation, cut a hole in its center the size of the cooling element and glue it to the smaller radiator using “liquid nails”. Solder the power wires to the terminals of the element (the red terminal should be “+”, and the black terminal should be “ground”).
Attach the resulting door to the hinges, and them to the body so that when it closes, the smaller radiator fits inside the body. To remove the wires from the housing, place a piece of rubber tube of suitable diameter on them. 
In the top plate, next to the cooler power connection contacts, drill a hole slightly smaller than the outer diameter of the tube. Route the wires through it, leaving the tube in the hole so that the wire does not rub against its edges. Attach the fan to the door so that it points towards it and connect it to the same pair of wires. All that remains is to attach a latch and some kind of handle for carrying the device and the cold generator is ready.
Selecting wire cross-section
To find out the current consumed by the built air conditioner, add the rated current of the fan with the same parameter of the cooling element. After this, all that remains is to select from the directory the wire cross-section corresponding to this current. We provide below a fragment of the reference book sufficient to make a decision in this case. For connection lengths up to 2 m:
- current up to 1.5 A, wire cross-section - 0.3 mm 2;
- current - 2.5 A, cross-section - 0.5 mm 2;
- current – 3.5 A, wire – 0.7 squares;
- current - 7.5 A, wire 1.5 square;
- current – 10 A, wire – 2 mm 2.
With a connection length of 3 m:
- I nom up to 1.5 A, wire – 0.4 mm 2;
- I nom – 2.5 A, wire – 0.8 mm 2;
- I nom – 3.5 A, wire – 1.1 square;
- I nom - 7.5 A, cross-section - 2.3 mm 2;
- I nom – 10 A, cross-section – 3.2 square.
If your air conditioner draws more current than the cigarette lighter fuse is designed for, you will have to connect it to the battery terminals through its own fuse link. But you will save on the connector for connecting to the cigarette lighter socket.
The cross-section of a single-core wire S after measuring its diameter d can be calculated using the formula - S=π * (d/2) 2. To determine the cross-section of a stranded wire, you need to count the number of strands under the insulation, calculate the cross-section of one and multiply by their number.
If you don't have a caliper, you can determine the diameter of a single-core wire using a regular ruler. To do this, wind 10 turns of wire around a screwdriver, turn to turn, and measure the length of the resulting winding with a ruler. Divide the result by 10 to get the wire diameter.
Power Requirements
The device power supply must be DC voltage no more than 15 V. Small ripples do not interfere with operation. So, in special conditions homemade air conditioner does not need it and can simply be connected to the on-board network of a car with 12 volt electrical equipment. For owners of cars with a 24 V on-board voltage, it is recommended to connect two cooling elements in series.
Advantages and disadvantages of thermoelectric cooling devices
Thermoelectric cooling air conditioner based on the Peltier effect has the following advantages: 
- High specific cooling power. With dimensions 40×40×3.8 mm, one element can drain thermal energy power up to 57 W.
- Quiet operation.
- Low cost. One element costs no more than $3.
- High reliability. The time of continuous operation before failure reaches 200 thousand hours.
Disadvantages of Peltier coolers:
- Low efficiency. Therefore, with a large cooled volume, it is difficult to achieve a significant temperature difference between opposite surfaces.
- The air conditioner consumes relatively more power. The current consumed by one element reaches 6 A.
- Part of the power consumption is spent on heating the radiator, which releases heat to the atmosphere.
A self-made refrigerator, of course, will not notice air conditioning or climate control, but in any case it will make traveling in hot weather easier.
A Peltier element is usually called a converter that is capable of operating from a temperature difference. This happens by flowing electric current through conductors through contacts. For this purpose, special plates are provided in the elements. Heat passes from one side to the other.
Today, this technology is in demand primarily due to its significant heat transfer power. Additionally, the devices can boast of compactness. The radiators installed on many models are weak. This is due to the fact that the heat flow cools quite quickly. As a result, the desired temperature is constantly maintained.
This element has no moving parts. The devices operate absolutely silently, and this is a definite advantage. It should also be said that they can be used for a very long time, and breakdowns occur extremely rarely. The simplest type consists of copper conductors with contacts and connecting wires. Additionally, there is an insulator on the cooling side. It is usually made from ceramic or
Why are Peltier elements needed?
Peltier elements are most often used to make refrigerators. Usually we are talking about compact models that can be used, for example, by motorists on the road. However, this is not the end of the range of applications of the devices. IN Lately Peltier elements began to be actively installed in sound and acoustic equipment. There they are able to perform the functions of a cooler.
As a result, the device amplifier is cooled without any noise. For portable compressors, Peltier elements are indispensable. If we talk about the scientific industry, scientists use these devices to cool the laser. In this case, it is possible to achieve significant stabilization of the study wave of LEDs.
Disadvantages of Peltier models
It would seem that such a simple and effective device has no drawbacks, but there are some. First of all, experts immediately noted the low penetration capacity of the module. This suggests that a person will have certain problems if he wants to cool a device that operates from a network with a voltage of 400 V. In this case, a special dielectric paste will partially help solve this problem. However, the current breakdown will still be high and the winding of the Peltier element may not withstand it.
Additionally, these models are not recommended for use in precision electronics. Since the design of the element contains metal plates, the sensitivity of the transistors may be impaired. The last disadvantage of the Peltier element is the small coefficient useful action. These devices are not capable of achieving a significant temperature difference.
Module for regulator
Making a Peltier element for a regulator with your own hands is quite simple. To do this, you should prepare two metal plates in advance, as well as wiring with contacts. First of all, conductors are prepared for installation, which will be located at the base. They are usually purchased with the "PP" marking.
Additionally, for normal temperature control, semiconductors should be provided at the output. They are necessary in order to quickly transfer heat to the top plate. To install all elements, you should use a soldering iron. To complete the Peltier element with your own hands, last of all, connect two wires. The first is mounted at the lower base and fixed at the outermost conductor. Contact with the plate should be avoided.
Next, attach the second wire at the top part. Fixation is also carried out to the outermost element. In order to check the functionality of the device, a tester is used. To do this, two wires need to be connected to the device. As a result, the voltage deviation should be approximately 23 V. In this situation, much depends on the power of the regulator.
Refrigerators with thermistor
How to make a Peltier element with your own hands for a refrigerator with a thermistor? Answering this question, it is important to note that the plates for it are selected exclusively from ceramics. In this case, about 20 conductors are used. This is necessary so that the temperature difference is higher. You can increase it up to 70%. In this case, it is important to calculate
This can be done based on the power of the equipment. A refrigerator using liquid freon is ideal in this case. The Peltier element itself is installed near the evaporator, which is located next to the motor. To install it, you will need a standard set of tools, as well as gaskets. They are necessary in order to protect the model from the starting relay. Thus, the cooling of the lower part of the device will occur much faster.
To achieve a temperature difference (Peltier effect) with your own hands, you may need at least 16 conductors. The main thing is to reliably insulate the wires that will be connected to the compressor. In order to do everything correctly, you must first disconnect the refrigerator dryer. Only after this is it possible to connect all contacts. Once installation is complete, the voltage limit should be checked using a tester. If the element malfunctions, the thermostat is the first to suffer. In some cases it occurs
Model for refrigerator 15 V
You can make a Peltier refrigerator with your own hands with small modules. The modules are attached mainly near the radiators. In order to securely fasten them, experts use corners. The element should not lean against the filter, and this should be taken into account.
To complete a Peltier thermoelectric module with your own hands, the bottom plate is mainly selected from of stainless steel. Conductors, as a rule, are used with the marking "PR20". They can withstand a maximum load of 3 A. The maximum temperature deviation can reach 10 degrees. In this case, the efficiency can be 75%.
Peltier elements in 24 V refrigerators
Using a Peltier element, you can make a refrigerator with your own hands only from conductors with good sealing. At the same time, they must be stacked in three rows for cooling. The operating current in the system must be maintained at 4 A. You can check it using a conventional tester.
If you use ceramic plates for the element, the maximum temperature deviation can be achieved at 15 degrees. The wires to the capacitor are installed only after the gasket has been placed. You can attach it to the wall of the device different ways. The main thing in this situation is not to use glue, which is sensitive to temperatures above 30 degrees.
Peltier element for car cooler
To make a high-quality auto-refrigerator with your own hands, a Peltier module (module) is selected with a plate whose thickness is no more than 1.1 mm. It is best to use non-modular wires. Copper conductors will also be required for operation. Their capacity must be at least 4A.
Thus, the maximum temperature deviation will reach 10 degrees, this is considered normal. Conductors are most often used with the marking "PR20". They have recently shown themselves to be more stable. They are also suitable for various contacts. A soldering iron is used to connect the device to the capacitor. High-quality installation is only possible on the relay block gasket. The differences in this case will be minimal.
How to make an element for a drinking water cooler?
A DIY Peltier module (element) for a cooler is quite simple. It is important to select only ceramic plates for it. At least 12 conductors are used in the device. Thus, the resistance will be maintained high. The connection of elements is usually carried out using soldering. There must be two wires for connecting to the device. The element must be attached to the bottom of the cooler. In this case, it may come into contact with the cover of the device. In order to eliminate cases of short circuits, it is important to fix all wiring on the grid or housing.
Air conditioners
The Peltier module (element) is made with your own hands for an air conditioner only with class “PR12” conductors. They are chosen for this task mainly because they cope well with low temperatures. At most, the model is capable of producing a voltage of 23 V. The resistance indicator will be at the level of 3 ohms. The temperature difference reaches a maximum of 10 degrees, and the efficiency is 65%. Conductors can only be laid in one row between sheets.
Manufacturing of generators
You can make a generator using a Peltier module (element) with your own hands. Device performance will increase by a total of 10%. This is achieved due to greater cooling of the motor. The device can withstand a maximum load of 30 A. Due to the large number of conductors, the resistance can be 4 ohms. The temperature deviation in the system is approximately 13 degrees. The module is attached directly to the rotor. To do this, you must first disconnect the central shaft. In many cases the stator does not interfere. To prevent the rotor winding from heating up from the inductor, ceramic plates are used.
Cooling a video card on a computer
To cool the video card, you should prepare at least 14 conductors. It is best to select copper models. Their heat conductivity coefficient is quite high. To connect the device to the board, non-modular type wires are used. The model is mounted near the video card cooler. To secure it, small ones are usually used.
To fix them, you can use regular nuts. The appearance of excessive noise during operation indicates that the device is not working properly. In this case, it is necessary to check the integrity of the wiring. You also need to inspect the conductors.
Peltier element for air conditioner
To make a high-quality Peltier element with your own hands for an air conditioner, double plates are used. Their minimum thickness should be at least 1 mm. In this case, you can hope for a temperature deviation of 15 degrees. After equipping the modules, the performance of air conditioners increases on average by 20%. Much in this situation depends on temperature environment. The stability of the mains voltage should also be taken into account. With minor interference, the device can withstand a load of approximately 4 A.
When soldering conductors, they should not be placed too close to each other. To properly complete Peltier modules with your own hands, the input and output contacts must be installed only on one of the two plates. In this case, the device will be more compact. A serious mistake in this situation would be to connect the module directly to the unit. This will lead to inevitable damage to the element.
Installing the module on a capacitor
To install it yourself, it is important to evaluate the power of the capacitor. If it does not exceed 20 V, then the element should be mounted with conductors marked “PR30” or “PR26”. In order to fix the Peltier module (element) on the capacitor with your own hands, use small metal corners.
It is best to install them four on each side. In terms of performance, the capacitor can ultimately add plus 10%. If we talk about heat losses, they will be insignificant. The efficiency of the device is on average 80%. The modules are not designed for high-voltage capacitors. In this case, it won't even help a large number of conductors.
