Condenser

Condenser

The condenser is a heat exchanger composed of copper or aluminium pipes with aluminium blades which increase the surface for heat exchanging.

The FREON 12 in its gaseous state, passing through the bends in the condenser, changes to a liquid (on average at around 60°C). An insufficient exchange of heat in the condenser increases the pressure in the system and prevents the complete condensing of the FREON 12. For this reason gaseous fluid would reach the expansion valve which would greatly decrease the refrigerating capacity of the system.

The condenser is lapped by the air produced from the forward motion of the vehicle or, when the vehicle is stationary or moving slowly, by the air produced by the electric fan.

Expansion valve

The expansion valve, more aptly named expansion pipe, is inserted in the evaporator inlet duct.

The valve, which can be seen in the figure below, has a cylindrical form and, apart from the metal inner tube is entirely constructed in plastic.

1. Outlet filter mesh
2. Expansion pipe
3. Inlet filter mesh
4. Evaporator inlet duct
5. O-Ring
6. Expansion valve assembly supporting tube

A. Entry of Freon 12 from the condenser

B. Outlet of Freon 12 to the evaporator

The two ends of the valve are made of an extremely thin narrow gauge mesh and serve as filters. The pipe has an inner diameter which is calibrated in order to allow the necessary volume of coolant to pass when the compressor is operating.

A rubber ring has been Installed on the outer part of the valve and this forms a seal against the inner surface of the evaporator inlet duct.