The present invention provides a control method of a refrigerator, comprising: a first defrosting step of defrosting an evaporator and terminating the defrosting when the evaporator reaches a first temperature; a step of detecting pressure difference by means of a differential pressure sensor for measuring pressure difference between a first thru-hole, disposed between the evaporator and an inlet through which air flows in from a storage compartment, and a second thru-hole disposed between the evaporator and an outlet through which the air is discharged into the storage compartment; and a second defrosting step of additionally defrosting the evaporator if the measured pressure difference is greater than a configured pressure.

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 defrost or thaw measuring device has a dumbbell or hourglass-shaped rotatable compartment with a cavity, the cavity being partly filled with at least two phase change materials having different melting points. The measuring device may determine the time period of thawing at two or more temperature intervals in the refrigeration space.

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.

The vehicle includes a thawing compartment configured to thaw a commodity housed therein, an acquisition device configured to obtain information including a thawing time limit set based on a request from a user, and a controller configured to control the thawing operation of the thawing compartment. The controller controls the thawing compartment so as to complete the thawing operation of the commodity housed therein by the thawing time limit.

The present disclosure provides a method of controlling a refrigerator that includes a compressor, an evaporator to supply cold air to a storage chamber, a defrosting heater to defrost the evaporator, and a controller to control the defrosting heater. The method includes: operating a cooling cycle for cooling the storage chamber; determining whether a defrosting start condition is satisfied during operation of the cooling cycle; determining whether a defrosting delay condition is satisfied when the defrosting start condition is satisfied; and starting a defrosting operation when the defrosting delay condition is not satisfied, and starting the defrosting operation at a delayed defrosting start time when the defrosting delay condition is satisfied.

The air-conditioning apparatus has a refrigeration cycle for circulating refrigerant by connecting a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger in this order with refrigerant pipes. The outdoor heat exchanger includes a plurality of heat transfer fins, a heat transfer tube having a plurality of paths, a distributor configured to branch, at an intermediate portion of the heat transfer fin, a refrigerant flow path into an upper path and a lower path of the heat transfer tube, a first temperature detecting unit configured to detect a refrigerant temperature merged through the distributor, a second temperature detecting unit configured to detect a refrigerant temperature of a refrigerant passing through the lower path, and a controller for performing control for terminating the defrosting operation when the refrigerant temperature detected by the first temperature detecting unit reaches the first target temperature and the refrigerant temperature detected by the second temperature detecting unit reaches the second target temperature during the defrosting operation.

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.

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.

A control method and device for a refrigerator, and the refrigerator. The refrigerator comprises at least two compartments. The control method comprises: acquiring a compartment currently requesting cooling; after detecting and confirming a first set time, the compartment currently requesting cooling not being cooled, determining a currently cooled compartment, and interchanging currently set valve body rotation angles corresponding to the compartment currently requesting cooling and the currently cooled compartment requesting cooling. The present disclosure may solve the problem in which a refrigerator cannot be cooled normally due to a connection error between the capillary tube and a solenoid valve during the production of a multi-system refrigerator, and reduces the refrigerator repair rate, improves the refrigerator production efficiency, and reduces fabrication costs.