6.4.2 Refrigeration system
1. Wiring
2. Function
Refrigeration system is composed of semiconductor refrigeration module, radiator, fan.
The main function of refrigeration board is controlling the semiconductor refrigeration module, to
keep the reagent disk temperature within 6-10℃.
As shown in the figure :
U1：refrigeration control board is the CPU of refrigeration system. It controls the working of
refrigeration system on the basis of the reagent disk temperature detected by temperature sensor.
Semiconductor refrigeration module and fan are controllable. The refrigeration control board starts
when the temperature beyond 6-10℃ to adjust the temperature. It also communicates with the main
control board.
DS18B20：the sensor used to detect the reagent disk and environment temperature
D1－D2：semiconductor cooling module（Peltier）
N3：12V switch power
N2：5V switch power
6.4.3 Main control board
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