An improved refrigeration cycle defrosting system and method is disclosed. The device uses operation of a compressor to supply heat for the defrosting process without relying on deviation of a hot refrigerant gas from the compressor outlet or any other heating device.

A cooling storage evaporator system employs a pivoting frost control door upstream from an evaporator that, when closed, inhibits air from passing through a lower portion of the evaporator. Closing the frost control door results in condensed water freezing on a lower portion of the evaporator when the AC is ON. When a vehicle engine is turned OFF when the vehicle stops in an idle condition, thereby turning the compressor OFF, the frost control door opens so that air passes over the evaporator, including the frozen portion thereof, melting the frozen condensed water to maintain the cool outlet air temperature at the vent.

A method for thawing of a transport transporting bulk material includes providing water vapor, introducing water vapor into a thawing chamber. The transport transporting bulk material and to be thawed is at least partially located in the thawing chamber. Air loaded with the water vapor and having a preset dew point temperature T.sub.T is generated in the thawing chamber, and the dew point temperature T.sub.T is adapted to the transport transporting bulk material.

The present disclosure discloses a defrosting device, including a heating unit provided at a lower side of an evaporator, and configured to heat working fluid therein; and a plurality of heat pipes, both end portions of which are connected to an inlet and an outlet of the heating unit, respectively, and at least part of which are disposed adjacent to a cooling tube of the evaporator to emit heat to the cooling tube due to high temperature working fluid heated and transferred by the heating unit, wherein the plurality of heat pipes are configured with a first heat pipe and a second heat pipe disposed to form two rows on a front portion and a rear portion of the evaporator, respectively, and the first heat pipe and the second heat pipe are formed in different lengths.

An improved refrigeration cycle defrosting system and method is disclosed. The device uses operation of a compressor to supply heat for the defrosting process without relying on deviation of a hot refrigerant gas from the compressor outlet or any other heating device.

A refrigerator includes a compressor that is configured to compress a refrigerant, a condenser that is configured to condense the refrigerant compressed in the compressor, an expander that is configured to depressurize the refrigerant condensed in the condenser, a first evaporator provided at one side of a refrigerator compartment, and that is configured to evaporate the refrigerant depressurized in the expander, a second evaporator provided at one side of a freezer compartment, and that is configured to evaporate the refrigerant depressurized in the expander, a valve unit provided at an outlet pipe of the condenser, and that is configured to introduce the refrigerant into at least one of the first or second evaporators, and a hot gas path that connects the valve unit to the second evaporator, and that is configured to guide flow of the refrigerant that has passed through the condenser.

A low temperature cooling and dehumidification system uses a reverse airflow arrangement to defrost a frosted cooling coil while not interrupting operation. Automatic air dampers are used to reverse the airflow at the proper time to initiate defrost of that section of frosted cooling coil. This system is useful for low temperature cooling and dehumidification in situations where the inlet air is above freezing, however exiting air below freezing can be supplied if desired. It is advantageous for operation if the coolant flow and temperature internal to the cooling coil are regulated to create the conditions for frost formation to begin closer to the air leaving side of the active cooling coil. The dehumidified generated condensate can be collected and used as grey water and/or potable water.