Chapter 6. Freezing cycle and refrigerant
6-1. Freezing cycle (Freezing principle/Refrigerant gas circulation diagram)
6-1-1. Freezing principle
Freezing is an operation of maintaining a lower temperature (generally 0°…) than the natural temperature (usually ambient
temperature surrounding us). This requires an insulated space, refrigerant (R134a) to absorb the heat and the circulation
circuit (compressor, condenser, evaporator etc.) to operate the phase change of the refrigerant.
6-1-2. Refrigerant gas circulation diagram
1. Compressor
2. Wire condenser
3. Drier
4. 3-way valve (2 EA)
5. Capillary tube (lid left)
6. Capillary tube (lid right)
7. Capillary tube (drawer left)
8. Capillary tube (drawer right)
9. Evaporator (lid left)
10. Evaporator (lid right)
11. Evaporator (drawer left)
12. Evaporator (drawer right)
13. Suction pipe
14. Cooling fan
Freezing cycle and refrigerant
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