Douwe Egberts Cafitesse 100, Service Manual

Page: 169 / 210

07.2004
5F - 7
Functions - Cooling System Service Manual Cafitesse 100
Design of the cooling system
• The design of the system is shown in fig. 1:
Insulation (1)
• The two-part styrofoam insulation (1) serves
to reduce the heating effect of the
surrounding area. (Fig. 2)
• Due to the relatively low refrigerating
capacity of the Peltier cooling a thick
insulation is necessary which helps to keep
the energy consumption of the system low.
Cooling compartment(2)
• The cooling compartment (2) consists of a
diecast aluminium container with an
additional surface to fasten the Peltier
element (3). The incoming heat is taken up
by the container wall and led to the Peltier
element. (Fig. 2)
Fig. 2
Peltier element (3)
• The Peltier element is made from ceramic
plates. The cooling elements are situated
between these plates.
• Very important for a proper functioning of
the system is a very good heat conduction
from the Peltier element (3) to both sides.
This is effected by plane contact surfaces
on the cooling compartment (2) and the
heat sink (4) and by a heat conducting
material which is used as contact material
(e.g. silicone lubricant). It is very important
to use only a small amount of the heat
conducting material and to spread it very
evenly. (Fig. 2)
DANGER: When mounting, ensure that
no dust particles gather
between these two planes.
4
3
1
2
1