Monitor repair course - refrigeration_course

refrigeration course

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

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 evaporator on its liquid form and leaves it in gas 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

Air conditioned dryer filter

Below we show a dryer filter for air conditioned, only for didactic purposes

In the dryer filter, all the moisture from the fluid is absorbed

Capillary tube

It's a tube thinner than the other tubes of the system
The capillary filter is right after the filter

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

Compressor

After passing trough the capillary tube, the pressure of the fluid drops and the fluid goes to the evaporator

Compressor is the heart of the system

This is the component which many layman call motor
It pulls the fluid towards the evaporator and the sucks it back from the compressor
So, the fluid circulates by through the system

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

The working 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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