Various electrical appliances have made our daily work much easier and we enjoy the benefits of these appliances. Electric fans, lights, air conditioners, refrigerators, etc. Appliances are needed by our day and night. The importance of refrigerators in daily life is immense. This machine is essential for storing vegetables, fish, meat, and cold drinks. The refrigerators available in the market are quite large and expensive. Although many people have this big fridge at home, they like to use a small table fridge. Sometimes a fridge is needed to travel far in the car, which is small and light to carry. Many people want to make a small fridge at home as a hobby, so that they can store cold drinks, chocolates, etc. Several medicines need to be stored at a certain temperature. In these cases, a small and light table fridge is very convenient. In many cases, it is not possible to buy a refrigerator, but they also need to store cold drinks and chocolate. Realizing these reasons, I made a small and light refrigerator. As the method of making the fridge is simple and the cost is very low, it will be easy for all people to make it. I have discussed in detail below how I made this fridge and what materials and parts were required.
Materials & Parts:
I had to buy quite a few parts and materials to make this mini fridge. For example, Peltier, CPU cooler, heatsink, thermal paste, foam sheet, and wire. Below I discussed in detail the work of all these parts, from where I bought them, and how much they cost.
Peltier Module:
Peltier modules are such parts that when power is applied, one side of it becomes very cold and the other side becomes very hot. It looks square and flat. This Peltier consists of 2 plates mounted side by side. It is run by DC electricity. When electricity is supplied, the temperature of one plate is absorbed and the other plate becomes hot. As a result, the plate starts to cool. These Peltier modules are used to cool various devices. For example, in cooling the computer CPU. Besides, many people use this Peltier to make AC and fridges at home. Peltiers are generally of various rated power. for example is marked 12706 thai is 12v,6Ah, and the other is 12715 that is 12v , 15A. I bought this Peltier module online. It cost 400 rupees. Below is the link to buy online
CPU Cooler:
The CPU cooler that I have used in making the fridge is the Cooler Master Hyper 212X . This cooler has a fan, heat sink, and copper pipes. Copper is a good conductor of heat. That is why heat is being transmitted through this copper pipe and that heat is being cooled by the flow of air. I used this cooler to cool the hot portion of the Peltier. This cooler was 15 watts. The price of this cooler bought online is 1500 rupees.
Heat Sink:
The function of the heat sink is to collect heat and remove it. I have installed a heatsink on the cold surface of the Peltier so that the cooling from the cold surface can spread quickly to the chamber of the fridge. As a result, the chamber of the fridge gets cold. I bought this heatsink online which cost 250 rupees.
Thermal Paste:
The function of thermal paste is to connect the surfaces to the heat sink properly leaving no gap. It is a good conductor of heat. I coat both sides of the Peltier with this paste. Through this paste, the heat on both sides of the Peltier will be properly supplied to the heatsink and cooler. I bought this thermal paste online for Rs.200.
Foam Sheet:
I made the refrigerator chamber with a 1-inch thick foam sheet. In this case, I needed 2 foam sheets, which I bought from the local market for 50 rupees each.
Colorful Paper:
I cut the colorful paper according to size and wrapped the outside of the refrigerator cabinet. So that the outer beauty increases. Such colorful paper is available for purchase at stationery stores.
How to Make:
First, we cut the foam sheet according to the required size. I made the cabinet of the fridge by gluing together the pieces of foam sheet. In this case, the chamber is divided into two parts. The upper part is for installing the cooling system and the lower part is for keeping the material.
Apply the thermal paste on both sides of the Peltier.
I put the heatsink on the cold side and the CPU Cooler on the hot side and fit it in the chamber of the cooling system.
The door made of foam sheet is properly set in the chamber. Care should be taken while setting the door so that there are no gaps.
Why Do People Want to Use It:
Fridges are usually large and heavy. As a result, people cannot carry it around. Being small, this type of mini fridge is also very easy to carry. This type of small fridge can be used as a Car-Fridge. In that case, the fridge cabinet should be made with hard material.
Although many people have a big fridge at home, they like a small fridge, which can be kept on the study table. This small version of the fridge also adds a lot of beauty when arranged on the table.
Who does not like to drink cold drinks in summer? Some people don’t have a big fridge, but they also like to drink cold drinks at home. A self-made mini fridge is very convenient in these cases.
Advantage and Disadvantage:
The cooling system made up of a Peltier module has been used in this fridge, it has been possible to lower the temperature of the fridge chamber up to 4 degrees Celsius. Cold drinks, chocolate, or such things can be stored in this fridge. But such a fridge is not suitable for storing ice cream.
