Transformation of an old household appliance into functional smokehouse is not just a way of disposal, but also an opportunity to get a device for preparing professional-level delicacies. Old refrigerator owing to its design, which provides for tightness and thermal insulation, is an ideal candidate for the role of a smoking cabinet. Unlike welded barrels or brick structures, there is already a ready-made chamber with shelves and a door.
The main advantage of such a homemade product is the possibility of year-round use, since the walls of the unit perfectly maintain the temperature inside. You will not have to additionally insulate the structure in winter, which is often required when building smokehouses from other materials. The creation process requires minimal technical skills, but strict adherence to fire safety rules.
In this article we will look in detail at how to turn the case into an effective one smoking chamber, where to insert it correctly smoke generator and what nuances need to be taken into account when starting up for the first time. You will learn why it is important to remove all plastic elements and how to organize the correct draft to obtain the perfect smoke.
Selecting and preparing the refrigerator body
The first step will be to find a suitable donor. For smokehouses, old Soviet models or more modern units with a metal internal coating are best suited. It is strictly not recommended to use chambers with plastic internal walls, since when heated they can release toxic substances that will spoil the taste of the product.
Before starting work, it is necessary to completely dismantle all internal equipment. This includes the compressor, condenser, freon lines and, most importantly, the No Frost system with its plastic ducts and fans. You can only leave metal grates and hooks if they are made of stainless steel or coated with food-grade varnish.
⚠️ Attention: Freon and compressor oil can be dangerous when burned or heated. Removal of the refrigeration circuit should be carried out in a well-ventilated area, away from open flames. It is better to cut the tubes rather than saw them to avoid sparking.
After dismantling, the inside is thoroughly washed. If the smell of household chemicals or old products remains on the walls, it must be neutralized. To do this, you can use a solution of soda or vinegar water. Then the body is dried in the sun.
It is important to check the condition of the rubber seal on the door. If it is cracked or has lost elasticity, it is better to replace it with a new one or use a heat-resistant analogue to provide the necessary tightness chambers.
Necessary tools and materials
To implement the project, you will need a basic set of tools, which is usually found in the garage of any household masters The main work will be done by grinder (an angle grinder) with metal discs and a drill with a set of drills. A jigsaw will also be useful for cutting out holes of complex shapes.
The main material for modernization will be sheet metal 1.5-2 mm thick. Reinforced shelves and grease trays will be made from it. To connect the elements, it is better to use welding, but if you don’t have this skill, you can use heat-resistant bolted connections using heat-resistant gaskets.
The list of required components includes:
- 🔥 A metal container for sawdust (for the floor version) or a ready-made smoke generator.
- 🔥 Thermometer with a range of up to 150°C (preferably with a remote sensor).
- 🔥 Metal gratings or rods for hanging products.
- 🔥 Bricks or concrete blocks for installing the structure.
- 🔥 High-temperature sealant for processing seams.
Special attention should be paid to the choice thermometer. Temperature control is key to successful smoking. Cheap mechanical models often lie, so it is better to take a digital device with a probe that can be placed at different heights inside the chamber.
To create holes for ventilation and a chimney, you will need a metal crown or a large-diameter drill. All metal sections must be cleaned to eliminate the risk of cuts during further operation.
Diagram and design drawings
Before picking up the tool, you must clearly imagine the end result. There are two main schemes: with an upper firebox (classic) and with a lower one (use smoke generator). The second option is more modern, economical and allows for better control of the process.
When using a smoke generator, it is connected to the side, at the bottom of the chamber. The smoke rises up, envelops the food and exits through the top vent. This scheme ensures a more uniform distribution of smoke and allows you to smoke products in cold and hot ways.
Why is the height of the chamber important?
A high chamber (human height) allows you to hang large carcasses or use many tiers for small fish, but requires a more powerful source of smoke to fill the volume.
If you plan to use the classic method with smoldering sawdust at the bottom, then in the lower part of the body (about 20-30 cm from the bottom) you need to provide a place for a brazier. In this case, the products are placed on grates above the fire level.
To visualize the process, you can use the following table for comparing design types:
| Parameter | With a smoke generator | With a fryer inside |
|---|---|---|
| Location of the source smoke | Side/bottom (external chamber) | Inside the case (at the bottom) |
| Temperature control | High (regulated by compressor) | Medium (depending on blower) |
| Fire risk | Minimal | Increased |
| Sawdust consumption | Economical | High |
The drawing should take into account the dimensions of your specific refrigerator. The standard height is 150-180 cm, width - 60 cm. Based on these dimensions, the number of tiers for placing products is calculated.
Modernization of the body: drilling and strengthening
The remodeling process begins with marking the places for inserting elements. A hole with a diameter of 20-30 mm is drilled in the lower part of the side wall (or in the center of the bottom if the firebox is inside) to connect the chimney. If an external one is used smoke generator, the hole is made at a level of 10-15 cm from the bottom.
An exhaust hole must be arranged in the upper part of the rear or side wall. Its diameter is usually 20-30 mm. Here it is important to install a damper or draft regulator to be able to control the intensity of smoke circulation inside the chamber.
The shelves inside the refrigerator are often made of glass or plastic. They need to be replaced. New bases are cut out of sheet metal and installed on standard guides. If there are no guides or they are plastic, new corners are welded or screwed in.
☑️ Modernization stages
To install the thermometer, a hole is drilled in the upper part of the door or side wall at the level of the upper tier of products. The dipstick is inserted inside, and the dial is attached outside. The probe entry point must be sealed.
⚠️ Attention: When drilling holes in a metal case, use safety glasses. Metal shavings can fly into your eyes, and the sharp edges of the holes can injure your hands during installation.
If you plan to use the refrigerator for hot smoking at temperatures above 80°C, it is advisable to remove the factory paint from the internal walls and coat them with heat-resistant enamel for ovens or barbecues. This will prevent the paint from fading and particles from getting on the products.
Installation of a smoke generator and smoke removal system
The most effective solution is to use an external smoke generator. This device consists of a combustion chamber (usually a pipe with a diameter of 100 mm), a compressor for supplying air and a smoke cooling system. The connection is made through a metal pipe with a diameter of 20-25 mm.
The chimney pipe is inserted into the refrigerator body through a prepared hole. The entry point of the pipe must be sealed with non-flammable material, for example, basalt cardboard or ceramic wool, so that the smoke does not come out, but goes strictly into the chamber.
For cold smoking, which is ideal for fish and meat delicacies, the length of the connecting hose or pipe between the generator and the refrigerator should be at least 1.5-2 meters. This is necessary to cool the smoke to 20-30°C.
An exhaust hood is installed in the upper part of the chamber, opposite the smoke entrance or diagonally. A simple hole is often not enough, so it is recommended to install a short metal pipe (50-100 mm) with an adjustable flap on top. This will create the necessary draft.
Checking the smoke removal system is carried out without products. The sawdust lights up and the compressor turns on. Smoke should fill the chamber evenly and come out slightly from the top hole. If smoke pours out of all the cracks, it means that the seal is broken or the draft is insufficient.
First launch and testing of equipment
The first launch is a critical moment. It should be carried out outdoors, away from residential buildings and flammable materials. Load sawdust into the chamber, light it and warm up the empty refrigerator for 30-40 minutes.
During warming up, the remnants of factory lubricants, paint and contaminants will burn out. An unpleasant odor may appear - this is normal. After cooling, the chamber is wiped again with a damp cloth.
For test smoking, it is best to use an inexpensive product, such as fish or chicken wings. This will allow you to evaluate the operation of the system, cooking time and taste without the risk of spoiling an expensive piece of meat.
- 🍖 Load the food without filling the chamber too tightly - the smoke should circulate freely.
- 🍖 Monitor the thermometer readings, adjusting the airflow and compressor power.
- 🍖 Evaluate the color and smell of the product after the cycle is complete.
If the product turns out bitter, it means the smoke was too hot or resinous woods were used. If the product is pale, there is not enough time or smoke density.
A successful test run confirms that the smokehouse is ready for full operation. Now you can experiment with different recipes and marinades.
Rules for safe operation
Although a homemade smokehouse from the refrigerator is a convenient device, it requires compliance with strict safety rules. The main risk comes from open flames and high temperatures. The structure must be installed only on a non-combustible base: concrete tiles, bricks or metal sheet.
Never leave a working smokehouse unattended, especially if the method of open burning of sawdust inside the body is used. The wind can fan the flame, which will lead to the bottom of the refrigerator burning out and a fire.
⚠️ Attention: Do not use coniferous wood (pine, spruce) or birch with bark for smoking. They contain resins that settle on foods, making them bitter and unhealthy. Alder, apple, cherry, and beech are ideal.
After each use, the chamber must be ventilated and cleaned of grease deposits. Fat dripping from food should not accumulate at the bottom in large quantities, as it may ignite the next time it is heated. Use removable trays to collect grease.
Regularly check the condition of seals and metal connections. Under the influence of temperatures, metal can deform and rubber can dry out. Timely replacement of worn-out elements will extend the life of your smokehouse.
Following these simple rules will make the smoking process safe and enjoyable, and the products tasty and healthy.
Is it possible to use an old refrigerator with plastic shelves?
It is strictly forbidden to use plastic shelves. When heated even to 60-70°C, the plastic begins to deform and release toxic substances that will settle on the products. All internal elements made of plastic, glass and rubber (except for the door seal, if it is heat-resistant) must be removed and replaced with metal ones.
What sawdust is best suited for smoking?
Sawdust from fruit trees (apple, cherry, plum) and alder are considered the best. They give a noble aroma and a beautiful golden color to the product. You can add a little juniper for spice. It is important that the sawdust is dry, but not too dry into dust.
Is it necessary to remove the paint inside the refrigerator?
For cold smoking (up to 30°C) this is not necessary if the paint does not have a strong odor. For hot smoking (above 60°C), it is better to remove the paint mechanically (brush, sandblast) and cover the surface with heat-resistant food enamel or leave it as is if it is food grade stainless steel, but be prepared for the paint to begin to bubble.
How long can you store products after smoking?
Hot smoking products smoked products are stored in the refrigerator for 3-4 days. Cold smoked products, due to their lower moisture content and greater exposure to smoke antiseptics, can be stored for up to 2-3 weeks in a cool place, and even longer in a vacuum.