Electrolux Refrigeration System Block Diagram and Components

Hey, in this article we are going to see Electrolux Refrigeration System Block Diagram and its important components. Electrolux Refrigeration System is a domestic refrigeration system for cooling without having any electrical or mechanical moving parts. It is also known as Alloctolux Refrigeration System or three-fluid refrigeration system because it uses three different fluids for the cooling process. These three fluids are - Ammonia(NH3) as a coolant/refrigerant, Hydrogen Gas(H2) as an inert gas, and Water as a solvent. 

This system requires only one energy source for its operation which is heat. Using a burner heat energy can be provided. The main advantage of this Electrolux Refrigeration System over a conventional electrical refrigeration system is that it does not have any moving parts such as a compressor, fan, etc. So, first of all, it consumes less energy and required minimum maintenance.

Block Diagram

Here, you can see the block diagram of Electrolux Refrigeration System.

Domestic Electrolux Refrigeration System Block Diagram

The main important components or parts of this system are,
  1. Generator
  2. Gas Burner
  3. Rectifier
  4. Condenser
  5. Evaporator
  6. Absorber
  7. Heat Exchanger


The generator is an enclosed space or container that contains the solution of ammonia(NH3) and water. As it generates the vapor from the heated mixture of water and ammonia it is called a generator. The actual process starts from this generator.

Gas Burner

A gas burner is used to heat the generator. When heat is provided to the generator using the gas burner, the ammonia inside the generator is dissolved in the water and converted into vapor. And the generated vapor goes to the rectifier.

Rectifier or Water Separator

The vapor generated in the generator has some water particles also. So the rectifier or water separator is used to completely remove the water particles from the vapor. After removing the water particles the pure dry vapor goes to the condenser. And the removed water sends back to the generator again.


The main function of the condenser in the Electrolux refrigeration system is to convert the dry vapor ammonia into liquid ammonia. And the liquid ammonia is sent to the evaporator. After the condenser, a 'U' shaped gas tube seal is used to prevent the backflow of the ammonia after mixing with the hydrogen in the evaporator.


Once the liquid ammonia entered the evaporator, it starts extracting heat from the evaporator. At the same time, the hydrogen gas comes from the absorber to the evaporator and is mixed with ammonia. It increases the hydrogen gas evaporation rate as well as the cooling rate. After extracting heat, the ammonia is again converted into vapor, and the hot mixture of ammonia vapor and hydrogen gas goes back to the absorber.


In the absorber, water(H2O) and hydrogen(H2) gas are available. As water is a liquid it is present at the bottom and Hydrogen gas is present at the top. As hydrogen gas is very light and insoluble so it does not dissolve in the water, rather than it will go to the evaporator.

When the mixture of ammonia vapor and hydrogen gas comes from the evaporator to the absorber the ammonia gas will dissolve in the water and the hydrogen gas will separate from the ammonia gas and again go to the evaporator.

Heat Exchanger

After mixing ammonia gas with water in the absorber, the ammonia solution goes to the heat exchanger. In the heat exchanger, it is heated and sent to the generator. The heated and weak ammonia solution is called in the heat exchange and goes to the absorber. The heat exchanger basically exchanges heat between the hot weak ammonia solution coming from the generator and the strong ammonia solution coming from the absorber.

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Electrolux Refrigeration System Block Diagram and Components Electrolux Refrigeration System Block Diagram and Components Reviewed by Author on 8:00 am Rating: 5