A defrosting control system includes an obtainer, a setting unit, and an outputter. The obtainer obtains schedule information indicating whether power saving is scheduled for a temporary power saving request. The setting unit sets a defrosting schedule including an execution time period and an execution interval of defrosting control for refrigeration equipment, based on the schedule information obtained by the obtainer. The outputter outputs an instruction to execute the defrosting control for the refrigeration equipment according to the defrosting schedule set by the setting unit.

A system includes a conductive element. The system also includes a resonant circuit having a sensing capacitor arranged such that an amount of target material in a sensing zone of the sensing capacitor changes a capacitance of the sensing capacitor, wherein the conductive element is electrically isolated from at least part of the resonant circuit. The system also includes a resonant circuit analyzer configured to detect a resonant frequency of the resonant circuit and to output a digitized analyzer signal based on the resonant frequency. The system also includes a processor configured to receive the digitized analyzer signal, to determine a target material estimate based on the digitized analyzer signal, and to output the target material estimate or a signal derived from the target material estimate to an output device.

A system includes a conductive element. The system also includes a resonant circuit having a sensing capacitor arranged such that an amount of target material in a sensing zone of the sensing capacitor changes a capacitance of the sensing capacitor, wherein the conductive element is electrically isolated from at least part of the resonant circuit. The system also includes a resonant circuit analyzer configured to detect a resonant frequency of the resonant circuit and to output a digitized analyzer signal based on the resonant frequency. The system also includes a processor configured to receive the digitized analyzer signal, to determine a target material estimate based on the digitized analyzer signal, and to output the target material estimate or a signal derived from the target material estimate to an output device.

An aspect of the present disclosure is to provide a refrigerator that enables a refrigerating chamber evaporator to replace an existing accumulator and defrost heater by improving a structure of the refrigerating chamber evaporator and a control method. The refrigerator in which a compressor, a condenser, a throttle, a freezing chamber evaporator, and a refrigerating chamber evaporator are connected through a refrigerant passage to form a refrigeration cycle. The refrigerating chamber evaporator may be provided between the freezing chamber evaporator and the compressor. A straight passage of a certain length may be formed at a refrigerant inlet side of the refrigerating chamber evaporator. A curved passage having a plurality of curved sections may be formed at a refrigerant outlet side of the refrigerating chamber evaporator.

An aspect of the present disclosure is to provide a refrigerator that enables a refrigerating chamber evaporator to replace an existing accumulator and defrost heater by improving a structure of the refrigerating chamber evaporator and a control method. The refrigerator in which a compressor, a condenser, a throttle, a freezing chamber evaporator, and a refrigerating chamber evaporator are connected through a refrigerant passage to form a refrigeration cycle. The refrigerating chamber evaporator may be provided between the freezing chamber evaporator and the compressor. A straight passage of a certain length may be formed at a refrigerant inlet side of the refrigerating chamber evaporator. A curved passage having a plurality of curved sections may be formed at a refrigerant outlet side of the refrigerating chamber evaporator.

A method for controlling a refrigerator includes: a step for determining whether or not a defrosting initiation condition is satisfied with respect to an evaporator; a step for, if the defrosting initiation condition is satisfied, detecting a pressure differential by means of one differential pressure sensor for measuring the pressure differential between a first through hole, which is positioned between the evaporator and an inlet port having air flowing in from a storage chamber, and a second through hole which is positioned between the evaporator and a discharge port having air discharged to the storage chamber; and a defrosting step for variably defrosting in accordance with the measured pressure differential.

An evaporator for use in a refrigeration system includes one or more Coanda evaporation chambers having an integrated, internal expansion device. The internal expansion device is a linear atomization tube having a plurality of ejection holes arranged in a series of spiral rows. Liquid refrigerant introduced into the linear atomization to is ejected onto the inner wall of the Coanda evaporation chamber, covering it completely with a thin layer of liquid refrigerant. Liquid refrigerant is fed to the linear atomization device in a series of rapid pulses.

A refrigerator is designed considering pressure distribution around a cooling fan with respect to a fluid outlet of a frost detecting device provided for frosting detection, so that the design may be efficiently perform with respect to the frost detecting device and precise frosting detection may be performed.

A refrigerator is designed considering pressure distribution around a cooling fan with respect to a fluid outlet of a frost detecting device provided for frosting detection, so that the design may be efficiently perform with respect to the frost detecting device and precise frosting detection may be performed.

A drain valve (10) includes a housing (11), a fluid inlet (12), a gas outlet (13) and at least one liquid outlet orifice (19) arranged in a liquid outlet member (20) of the housing (11). The drain valve (10) furthermore includes a float (16) connected to a lever (17) on a first end (18). The float (16) is arranged in a float chamber (15) of the housing (11). The float chamber (15) is connected to the fluid inlet (12), the gas outlet (13) and the at least one liquid outlet orifice (19). The liquid outlet orifice (19) may be opened or closed by a closing member (21) that is connected to a second end (22) of the lever (17) and is rotatably connected to the liquid outlet member (20).