Peltier-Type Chiller
Thermo-con/Rack Mount Type
Series
HECR
2
Circulating fluid supply port
(Tank lid)
(Also used as a fluid discharge port.)
For the rack type, a flow switch (option) is mounted on the circulating fluid OUT side.
Flow switch (Option)
Circulating fluid
Tank
Temperature
sensor
Pump
Peltier device
(Thermo-module)
Fan
T
Power switch
PE
Power supply &
Controller
Fan
Switching power supply
Controller
Circulating fluid
OUT
IN
Heat exchanger
(Circulating fluid side)
Heat exchanger
(Cooling side)
Figure 1
Target of
temperature
control
Example of circulating fluid piping
Figure 2
Electron
hole flow
Fan
Electron
flow
Circulating fluid
Current
Heat generation (heating)
Heat suction (cooling)
N
P
DC power supply
Cooling
Electron
hole flow
Fan
Electron
flow
Circulating fluid
Current
Heat suction (cooling)
Heat generation (heating)
N
P
DC power supply
Heating
Principle of Peltier Device (Thermo-module)
Construction and Principles
The Thermo-con is constructed as shown in Figure 1. It interposes
a Peltier device (thermo-module) between the heat exchangers for
the circulating fluid and facility water and controls the DC power
supply to achieve the target outlet temperature of circulating fluid
precisely.
The circulating fluid returns to the tank, and is transferred by the
pump which is built in the Thermo-con, and goes through the heat
exchangers and temperature sensor and out from the circulating
fluid outlet.
Figure 2 shows an example of circulating fluid piping. The circulating
fluid is transferred at a constant temperature by the pump.
A Peltier device (thermo-module) is a plate type
element, inside which P-type semiconductors and
N-type semiconductors are located alternately. If direct
current is supplied to the Peltier device (thermo-mod-
ule), heat is transferred inside the device, and one face
generates heat and increases temperature while the
other face absorbs heat and decreases temperature.
Therefore, changing the direction of the current supplied
to the Peltier device (thermo-module) can achieve
heating and cooling operation. This method has a fast
response and can shift quickly between heating and
cooling, so temperature can be controlled very precisely.
