Lesson #01

Presentation of the sealed hermetic system

The sealed hermetic system is where the refrigerant fluid flows through.

For best comprehension, let's show the parts of the hermetic system.
Later we will describe the system as a whole.

The evaporator

Below we can see the evaporator.
This part is aluminium made.

But why does it have this name, if nothing evaporates from it ?



As a matter of fact, nothing evaporates from the external side of the evaporator.
The fluid evaporates only in the internal pipes of the evaporator.

Inside the evaporator, the fluid passes from its liquid form to gas form.
So an evaporation happens inside it and this the origin of the name evaporator.

Condenser

The condenser is a part that is always hot.



The condenser works the opposite of the evaporator.
The fluid enter the condenser on gas form and leaves it in liquid form.

During the condenser process, the fluid loses its warmth which is dissipated over the air

Dryer filter

After leaving the condenser, the gas passes through the dryer filter
In the picture below you can see three filter types and all of them has the same function




Capillary tube

The capillary tube is thinner than the other tubes of the system and it's placed right after the filter.




After passing trough the capilar tube, the pression of the fluid drops and the fluid goes to the evaporator.

Compressor

The compressor is the heart of the system  known for many people as motor.

It pulls the fluid towards the evaporator and the sucks it back from the compressor.
So, the fluid circulates through the system.

Notice that this compressor has three tubes, input, output and service tube.

The service tube is only used to maintenance.

Don't worry about tubes function now.
They will be widely studied along the course


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