Using an old refrigerator to create a smokehouse is an ideal example of upcycling in the culinary field. Instead of throwing away a massive metal box, you give it a second life, turning it into a high-performance installation for hot and cold smoking. Leak-tightness a factory-made body is the main advantage of this solution, which allows you to keep the smoke inside and save wood chips.
The process of creating a smokehouse with your own hands requires care, but it is accessible even to a beginner with a basic set of tools. It is important to understand that the standard refrigerator is not designed for high temperatures, so the design will require modifications to work with heat. However, the result is worth it: you get a chamber with a volume of 200-300 liters, which allows you to smoke large volumes of meat or fish at a time.
Before starting work, you need to decide on the type of smoking, since the scheme for upgrading the unit depends on this. Hot smoking requires heating to 80-100°C, and cold - only 20-30°C, which imposes different requirements on the smoke removal and heating system. In this article we will analyze in detail all the stages of transforming household appliances into professional culinary tools.
Preparing the case and dismantling the equipment
The first thing that needs to be done is to completely free the internal space from all plastic and flammable elements. Remove shelves, drawers, plastic bars and rubber seals from doors. The interior of the refrigerator is often made of polystyrene or other polymers that melt when heated and release toxic substances, so their removal is critical.
After cleaning the case, you should take care of the natural ventilation system. In the lower part of the chamber (in the place of the former freezer or just below) and in the upper part (under the ceiling) it is necessary to drill holes with a diameter of 20-30 mm. They are needed to create draftso that the smoke circulates inside and does not stagnate, giving the products bitterness.
⚠️ Attention! Never use a refrigerator with a foam interior lining for hot smoking without first replacing the lining with metal or wood. When heated above 60°C, the foam may ignite or melt.
If you plan to use the device only for cold smoking, the interior trim can be left, but for the hot method it is better to line the walls stainless steel or with lining made of hardwood. This will protect the metal body from deformation and make caring for the smokehouse easier.
Creating a heating system: heating element or electric stove
The heart of your smokehouse will be the heat source. The simplest and most reliable option is to use an old one electric stoves with an open spiral. It is installed at the very bottom of the housing. A heavy metal container (for example, an old frying pan or basin) is placed on the spiral, into which wood chips are poured. When heated, the wood chips smolder, emitting smoke.
A more advanced option is the installation of Heating element (tubular electric heater). The power of the heating element should be from 1 to 1.5 kW for the volume of a standard refrigerator. It is mounted in the lower part, isolating the attachment points from the body with asbestos gaskets or ceramic bushings to avoid short circuits.
To control the temperature, it is necessary to remove the power regulator (rheostat) or thermostat to the outside. This will allow you to control the process without opening the door every time, which is especially important when cold smokingwhere overheating can spoil the product. The electrical cable must be heat-resistant and withstand temperatures up to 200°C.
Calculation of heating element power
For a volume of 200 liters, the optimal power is 1-1.2 kW. If the power is too high (more than 2 kW), the wood chips will burn too quickly, producing a lot of heat and little smoke, which will lead to the appearance of bitterness on the products.
Organization of a smoke generator for cold smoking
If your goal is cold smoked delicacies, an open fire inside the body is unacceptable. In this case, a separate one is made smoke generator. This is a metal container (for example, a can or a piece of pipe) in which wood chips smolder, and smoke is supplied to the refrigerator through a hose or pipe.
The pipe from the smoke generator cuts into the lower part of the side wall of the refrigerator. The length of the connecting pipe must be at least 2-3 meters so that the smoke has time to cool to the desired temperature (20-30°C). You can use aluminum corrugated pipes or copper tubes, but a steel pipe with a diameter of 50 mm is best suited.
It is important to ensure the tightness of the place where the pipe is inserted into the body. Use heat-resistant sealant or special flanges. The smoke should come from below, slowly rise up, envelop the food and exit through the top ventilation hole.
| Parameter | Hot smoking | Cold smoking |
|---|---|---|
| Temperature | 80-100°C | 20-30°C |
| Process time | 2-4 hours | 1-3 days |
| Smoke source | Inside the case (at the bottom) | External smoke generator |
| Shelf life | Up to 1 week | Up to 1 month |
☑️ Checking the smoke exhaust system
Installation of hooks and gratings for products
After the “technical” part is ready, you need to organize the internal space to accommodate delicacies. Holes are drilled in the side walls of the refrigerator at different levels for installation reinforcing rods or wooden slats. Hooks with meat or fish will be hung on them.
Using wood (alder, beech) for shelves is preferable to metal when hot smoking, since wood does not heat up red-hot and does not burn food. However, metal is easier to clean. It is optimal to make a combined system: lower levels for hanging, upper levels for installing baking trays with cheese or fish.
Don't forget about the tray for collecting fat and dripping juice. It is installed at the very bottom, directly above the heat source (but not on it), so that fat does not drip onto the hot wood chips or heating element. Burning fat will give the food an unpleasant burning taste and may cause inflammation.
⚠️ Attention! The distance between the heat sources and the products should be at least 30-40 cm. If there are a lot of products, change the hooks during the smoking process for uniform processing.
First start-up and temperature conditions
The first start of the smokehouse from the refrigerator is best done without products, the so-called “idle” heating. This will allow you to burn off any remaining factory lubricants, check for leaks and make sure the heating system is working. Bring the temperature inside to 80-90°C and hold it for about an hour.
When smoking meat or fish, strictly monitor the temperature. The optimal temperature for fish is 100-110°C (hot) or 25-28°C (cold). For poultry meat - 90-100°C. Control the process using thermometer, the probe of which can be brought out through the door seal or a special hole.
Smoking time depends on the size of the pieces and the type of product. Chicken is usually smoked for 2-3 hours, pork for up to 5-6 hours. It is important not to overcook the product, otherwise it will become dry and hard. Readiness is checked by making an incision: the juice should be clear and the meat should be easily separated from the bone.
Safety precautions and smokehouse care
A refrigerator smokehouse is an electrical appliance that operates at high temperatures. Install the device only on non-flammable base (concrete, brick, metal) away from wooden buildings and flammable materials. The power cable must be reliably protected from overheating.
After each use, remove carbon deposits from the walls and tray. Accumulated grease and soot may ignite the next time you start it up. Regularly check the condition of electrical contacts and wire insulation, especially if the smokehouse is stored outside under a canopy.
If you use a smokehouse in the country, provide a rain shelter. If water gets onto a hot heating element or into the ventilation holes, it can lead to a short circuit or deformation of the metal. (keep) the device in a dry place during the off-season.
Is it possible to use an old refrigerator with a damaged case?
It is not recommended to use a refrigerator with rust through or holes in the case, since the tightness necessary to create the desired temperature and smoke concentration will be broken. However, small defects can be welded or covered with metal plates. The main thing is that the walls retain heat.
Which wood chips are best not to use?
It is strictly forbidden to use softwood wood chips (pine, spruce) due to the high resin content. Also not suitable are birch wood (it produces tar) and any materials treated with chemicals (painted wood, chipboard, plywood). Ideal: alder, beech, oak, fruit trees.
Is it necessary to remove the factory paint from the body?
During hot smoking, the outer paint can fade and begin to peel, which is unsightly, but not critical for the function. However, if the paint is swollen, it is better to clean it and coat it with heat-resistant metal paint. This will extend the life of the body and prevent corrosion.