Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion
Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 1 (Q.No. 10)
10.
Defrosting of a refrigerator may be done by stopping the compressor for a short period.
Discussion:
13 comments Page 1 of 2.
Sheldor53 said:
5 years ago
Defrosting here refers to defrosting the contents inside the refrigerator (and not the cooling coils of the refrigerator itself). The moment the compressor stops working, there is no way the working fluid can reject the absorbed heat into the surroundings. Even more fundamentally, there is no pressure gradient for any flow in the refrigeration loop. So there's no refrigerator in the first place.
(1)
Abhishek said:
6 years ago
How? Explain it.
SRAVAN said:
7 years ago
In modern refrigerators, the compressor are directly off when the evaporator frosting occurs means ice formed on the coils of evaporator it reduces the power supply for the compressor. When the compressor of the defrosting occurs so that the ice is removed from the evaporator coils.
Raj said:
7 years ago
I think when defrost is used it will not allow refrigerant to enter in freezer only rest of part it circulate.
Frank said:
8 years ago
I think by regulating the flow rate of refrigerant we can achieve this without stopping the compressor. Just by decreasing the flow of refrigerant.
Amol Malode said:
8 years ago
Defrosting (or thawing) is the melting of an object or bringing a device's temperature above the freezing point to remove ice.
A defrosting procedure is generally performed periodically on refrigerators and freezers to maintain their operating efficiency. Over time, as the door is opened and closed, letting in new air, water vapour from the air condenses on the cooling elements within the cabinet.
A defrosting procedure is generally performed periodically on refrigerators and freezers to maintain their operating efficiency. Over time, as the door is opened and closed, letting in new air, water vapour from the air condenses on the cooling elements within the cabinet.
Vijay said:
9 years ago
"Frost-Free" refrigerator/freezer units usually use a heating element to defrost their evaporators, a pan to collect and evaporate water from the frost that melts from the cold plate and/or evaporator coil, a timer which turns off the compressor and turns on the defrost element.
Actually, defrosting take place while heater will turn on and it turn on after compressor stop. May be this reason for defrosting compressor turn-off.
Actually, defrosting take place while heater will turn on and it turn on after compressor stop. May be this reason for defrosting compressor turn-off.
Maqusud said:
1 decade ago
Compressor off means refrigerator off so due to the increment of temperature inside the refrigerator due to heat leakage defrosting takes place.
Dipti said:
1 decade ago
How it can be correct?
Ram said:
1 decade ago
The compressor compress the gas and sends to freezer. If compressor is stopped deforesting naturally begins. I not sure about this but someone will comment for this strange answer.
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