2-8) Operation Theory Of Refrigeration Cycle Components - Samsung RF18A Series Service Manual

PRODUCT SPECIFICATIONS

2-8) Operation theory of refrigeration cycle components

■ Condenser
1) Role : A device which radiates heat to the outside (water/air) to make liquid state for the high temperature / high pressure gas
refrigerant discharged from compressor
2) Types
A. Air-cooling Type : Condense air by circulating naturally or manually.
1) Natural Convection Type : Used for the household refrigerator which has small condensing capacity.
2) Manual Convection Type : Circulate air manually by FAN-Motor (Large capacity)
B. Water-cooling Type
※ Location
① CLUSTER heat-radiating type : All Pipes
refrigerator with hard urethanes and radiate heat through the whole surfaces of cabinet to ambient air.
② Install the condenser on the outside of the product. (An old model)
③ Make them cluster at the lower part of product and radiate heat manually by fan.
⁃ Radiate condensed potential heat up to liquefy completely and make change the state without changing the gas
temperature itself.
※ Pipe thickness
① Micro-channel tube : 0.01"(0.25mm) ② Steel Pipe : 0.02"(0.5mm), 0.028"(0.7mm) ③ Capillary : 0.019"(0.49mm
※ Condenser length
① CONDENSER : 9.84"(0.25m) × 14Pcs (Parallel) ② HOT-PIPE : 328.5"(8.345m)
■ Capillary
1) Role : A device which makes low temperature and pressure refrigerant by reducing the pressure the normal temperature / high
pressure liquid refrigerant condensed from condenser, and supply it to the evaporator.
A. To evaporate more lower temperature in case of evaporation.
B. It flows to the evaporator without back flowing to condenser, if compressor stops, and the difference of pressure between high
pressure and low pressure is small so it is easy to operate the compressor again.
2) Outline
A. Thickness : 0.019 inch
B. Length : It is changeable to low temperature and pressure (142->71 psi) depends on the 157.5inch of thin and long copper pipe
wall resistance.
■ Evaporator
1) Role : As the low pressure liquid refrigerant flowed from capillary absorbs heat inside of the refrigerator, it becomes low pressure
gas and refrigerate the foods.
2) Theory : The low pressure refrigerant flowed to evaporator operates cooling which takes ambient evaporated potential heat with
maintaining the evaporation up to evaporate completely.
3) Types:
A. ROLL-BOND Evaporator → Direct Cooling
☞ Rolled and adhere the 2 aluminum plate and then make refrigerant passage.
B. FIN-PIPE Evaporator → Indirect cooling
☞ A small aluminum plate on the aluminum pipe to increase the cooling effect.
■ Compressor
1) Role : It operates same as pump which pull out the subterranean water. It inhales the low temperature and pressure refrigerant
gas (flowed out) from evaporator and make high temperature and pressure refrigerant liquid in the compressor and send it
to the condenser.
2) Type
A. Back-and-forth motion type : A method that pistol makes back-and-forth motion through
and compresses. ※ Used for household refrigerant.
B. Rotary Type : A method that inhales the refrigerant gas through the gap between the outside of rotor electric attached on the
shaft (rotation axis) and the inside of cylinder and compresses.
C. Centrifugal Type
This document cannot be used without Samsung's authorization.
: Make cooling water pass through the pipe in the condenser (Large capacity)
effective for radiating heat are formed in the right/left, and front side of
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shaft and cylinder of motor rotation