X. Y. Huang
concept. Compared with the traditional water machine, it is obviously more energy saving and healthy.
Semiconductor refrigeration technology is based on semiconductor materials composed of P-N junction,
formation of thermocouple, which produce the Pal effect for semiconductor chip. That is, after the semicon-
ductor chip get into the dc power supply, it will absorb heat at one end of the joint, the other end will release
quantity of heat, heat size is determined by the current.
Parr post effect of physics principle is: the current charge carriers in different materials are in different levels,
when it moves from high level to low level, then release the excess energy. On the contrary, when the carrier
from low level to high level, it will absorb energy from the outside world. Semiconductor refrigeration is a heat
transfer tool. As long as the temperature of the cooling object is higher than the cold ends of semiconductor
refrigeration piece, heat will be absorbed from the cold end and released in the hot end [6].
Semiconductor electrothermal film uses the insulator with excellent resistance of high temperature, high
strength as the matrix, using a special process (temperature 800˚C - 1000˚C) on the substrate coating to prepare
the inorganic materials. The conductive film made of the mixture, can work under 400˚C. The electrothermal
has the characteristics of quick-start, large heat-transfer area, high stability, high efficiency of electric power
con- version (95%), so using it as a heating device has obvious energy saving effect.
3. Common Computing Task of the Pow
Assume that the room temperature environment, cold water and hot water flow process is timely 25˚C. regard-
less of the water in the process of the flow due to the temperature of the system inertia, lower water temperature
of or falling). We selected the refrigeration power is
of refrigeration, heating
module is
. Because the change of constant pressure heat capacity of water in the heating range is not
big, taking
. Now assume that 250 ml of water counted by the discharge positioning flows over
in 25 seconds.
The cold water valve of the water temperature:
-6
538.5*25
t252512.1 C
1000*250*10*4174
cold
p
PT
v
c
ρ
=−=− =
Semiconductor wafers in cold end surface absorption heat and the heat generated by the work itself is trans-
ferred to the hot face, so that the level of the water in the radiator (about 2 liters) temperature rises to:
6
(538.5 12*6*5 12*15*2)*25
2528.8 C
1000*2000*10 *4174
hot
t
−
++
=+=
Thus, the water temperature of the hot water valve as follows:
6
* 2000*25
t'28.828.876.7 C
** 1000*250*10 *4174
hot p
PT
vc
ρ
−
=+=+ =
At this point, the temperature of the hot water valve is appropriate, so it can be drink directly. It is proved that
the parameters of this work are set with rationality.
4. Water Structure in Water Dispensers
Drinking water from escaping from the barrels are divided into two after the road, all the way through the semi-
conductor refrigeration piece of cold ends, achieve rapid refrigeration; In addition all the way water flows
through the first semiconductor refrigeration piece of hot end, for the semiconductor refrigeration piece of cool-
ing at the same time, the implementation level of preheating, then flows through the electrothermal heating tube,
realizes the secondary heating, become the hot water.
Water diagram of water dispenser in Figure 2.
As shown in Figure 1, the semiconductor refrigeration piece of hot end is with ribbed, cold section and heat
exchanger fit closely to increase heat exchange area. To the left of the device for cold water, the direction of
flow is from top to bottom, its external is also equipped with plastic foam thermal insulation layer, decreasing
water heat exchange with the outside world at the same time. It also makes the fin in a cold environment and
easy to work. Warm water warehouse is on the right and its direction of flow is from bottom to top (the density