Mini fridge 12V do it yourself


A great piece of art for summer is to make a miniature refrigerator with low-voltage power. Variety of supply voltage (220 V, 12 V, 5 V) makes it possible to use such a refrigerator almost anywhere: in a car, office, home, etc.. This is a wonderful thing to cool drinks on a hot summer day.

Will need


Making a miniature refrigerator on the Peltier element


The case was made of arbitrary sizes, taking into account the placement of the cooling unit, the power unit and the beverage chamber. It will consist of two sections: one for the technical part, the other for cooling products.
We make the case. Mark up a piece of hardboard with a pencil and ruler.
Mini fridge 12V do it yourself

Hacking all the elements.
Mini fridge 12V do it yourself

All parts of the body are ready.
Mini fridge 12V do it yourself

From the middle part, which divides the refrigerator into two parts, cut a window for the radiator with a Peltier module.
Mini fridge 12V do it yourself

Apply the cooling unit to the side of the case.
Mini fridge 12V do it yourself

And ream a lot of holes on both sides. That is, air will flow from one side through the holes in the side.Pass through the radiator taking heat and exit through the holes on the other side.
Mini fridge 12V do it yourself

We paint with spray paint all the parts of the refrigerator body from the can.
Mini fridge 12V do it yourself

Getting to the assembly.
Mini fridge 12V do it yourself

Glue the separating part of the cooling unit to the hot glue.
Mini fridge 12V do it yourself

We glue all parts of the body, from two sides.
Mini fridge 12V do it yourself

Mini fridge 12V do it yourself

The cooling unit lies on a wooden piece that is glued to the base.
Mini fridge 12V do it yourself

For lighting, you will need two sections of the LED strip 12 V. One color is white, the other color.
Mini fridge 12V do it yourself

We fasten a small fan.
Mini fridge 12V do it yourself

The technical part of the refrigerator is divided into two parts. The power supply will be located at the top. The separating wall is placed on square pieces of wooden slats glued to the sides.
Mini fridge 12V do it yourself

Install the back wall.
Mini fridge 12V do it yourself

Mini fridge 12V do it yourself

The door will be made from a piece of acrylic glass. Mark with ruler and pencil.
Mini fridge 12V do it yourself

Miniature loops can be bought or made yourself. We glue them for a second glue.
Mini fridge 12V do it yourself

The sides of the acrylic glass are pasted with a black self-adhesive tape.
Mini fridge 12V do it yourself

We glue the handle on the door.
Mini fridge 12V do it yourself

We organize the backlight. Solder the contacts to the end mini switch.
Mini fridge 12V do it yourself

Solder the wires to the segments of the LED strip. The segments themselves are glued to a mini shelf, made from the same acrylic.
Mini fridge 12V do it yourself

Mini fridge 12V do it yourself

We combine lighting, fans, Peltier element.
Mini fridge 12V do it yourself

Set the switch on the side.
Mini fridge 12V do it yourself

Isolate all open strands.
Mini fridge 12V do it yourself

Close the compartment with the cooling unit. This must be done so that the hot air does not rise up and does not heat the power source.
Mini fridge 12V do it yourself

Drill a hole under the power cord 220 V.
Mini fridge 12V do it yourself

To the refrigerator door did not open - install on the side of small neodymium magnets from a broken sidiroma.
Mini fridge 12V do it yourself

We close the top cover, but before that we cut in the power switch, solder the wires. Now the refrigerator can be turned off with the button on top.
Mini fridge 12V do it yourself

Close the lid and fix the glue.
Mini fridge 12V do it yourself

For proper thermal insulation we paste the inside of the refrigerator with a thin foam plastic. We put the cut foam panels on the hot glue.
Mini fridge 12V do it yourself

We make cuts in the plates for all the projections and parts.
Mini fridge 12V do it yourself

Now the useful cold will not be wasted and the efficiency of the refrigerator will increase.
Mini fridge 12V do it yourself

At the very end, we add an electronic thermometer from the inside, and its sensor is located closer to the small fan that is inside the camera.

Work mini fridge


This form has a refrigerator in the dark with the door closed.
Work mini fridge 12 V

When opened, the white light comes on and the color light turns off.
Work mini fridge 12 V

And finally, the result of the work is that in thirty minutes the temperature inside the camera fell from 42 to 16 degrees Celsius. Drinks cooled to a temperature of 20 degrees Celsius. And all this in 30 minutes!
Work mini fridge 12 V

Mini fridge 12V do it yourself

Of course, the efficiency of such a refrigerator is much lower than that of a compressor, but it also has its advantages, one of which is low-voltage power, which can be not only 12 V but 5 V! Naturally, it is quite possible to power it from the computer’s USB port, although the return will be lower than when powered by 12 V.
The total power consumption when powered from 220 V is about 100 watts.

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