A refrigerator that includes a compressor configured to compress a refrigerant; a condenser configured to condense the refrigerant; a first evaporator that is configured to evaporate the refrigerant, the evaporated refrigerant being configured to cool a refrigerating compartment; a second evaporator that is configured to evaporate the refrigerant, the evaporated refrigerant being configured to cool a freezing compartment; a first heat exchanger; a refrigerating-compartment expansion device that is coupled to the first heat exchanger and that is configured to expand the refrigerant and provide the expanded refrigerant to the first heat exchanger; a second heat exchanger coupled to the second evaporator; and a freezing-compartment expansion device that is coupled to the second heat exchanger and that is configured to expand the refrigerant and provide the expanded refrigerant to the second heat exchanger, wherein the first heat exchanger is configured to cool the second heat exchanger is disclosed.

A refrigerator appliance including a multi-capacity compressor and a refrigerant circuit with two conduits and pressure reducing devices arranged in parallel between an evaporator and a condenser. Refrigerant can flow through one, both or none of the conduits and pressure reducing devices. The appliance also has a heat exchanger in contact with either one pressure reducing device, or one conduit between the pressure reducing device and the valve system. The appliance also includes a controller for priming the compressor above a nominal capacity for a predetermined or calculated duration at the beginning of an ON-cycle.

A refrigerating apparatus may include a main body having an interior space in which an article is accommodated, a door configured to open and close an opening of the main body, a compressor configured to compress a non-azeotropic mixed refrigerant, a condenser configured to condense the compressed non-azeotropic mixed refrigerant, a hotline provided at a contact portion between the main body and the door through which the condensed non-azeotropic mixed refrigerant flows, an expander configured to expand the non-azeotropic mixed refrigerant, heat of which is radiated by the hotline, and an evaporator configured to evaporate the expanded non-azeotropic mixed refrigerant to supply cold air to the interior space. According to such structure, even when the non-azeotropic mixed refrigerant is used, a function of the hotline to prevent dew formation may be normally performed with hot refrigerant.

A thermal storage container is coupled to a pump for circulating cooled liquid from the thermal storage container in at least one of two circuits. One circuit includes a heat exchanger coupled to the fresh food evaporator for assisting in cooling the fresh food section of the refrigerator or for chilling the liquid. Another circuit includes a sub-cooler between the condenser and the evaporator for cooling the output from the condenser before entering the evaporator, herby increasing the efficiency of the system. A three-way valve is coupled from the output pump to couple the stored coolant selectively to one or the other or both of the coolant circuits.

A refrigerator appliance including a refrigerant circuit between a condenser, an evaporator, and a compressor that includes two conduits and pressure reducing devices arranged in parallel between the evaporator and the condenser. The appliance also includes a valve system to direct refrigerant through one, both or none of the conduits and pressure reducing devices, and a heat exchanging member in thermal contact with either one pressure reducing device, or one conduit between the pressure reducing device and the valve system.

A multiple-evaporation cooling system in which the intermediate heat exchanger of first evaporation line includes at least a segment of the physically arranged expansion device in contact with at least a portion of the second row of evaporation and the intermediate heat exchanger's second evaporative line includes at least one expansion device segment physically disposed in contact with at least one portion of a first evaporation line. Considering the temperature of the intermediate heat exchanger of first evaporation line influences the temperature of the refrigerant flowing in the second line of evaporative expansion device and the temperature of the intermediate heat exchanger of the second evaporative line influences the temperature of the refrigerant flowing in the first line of evaporative expansion device. Features include varying the restriction of the respective expansion devices and then unduly inhibit mass transfer of refrigerant between at least two distinct evaporation.

A refrigerant piping device includes a refrigerating head, an input unit connected to the refrigerating head to input refrigerant, and an output unit connected to the refrigerating head to output refrigerant. The output unit includes a refrigerant return pipe connected to the refrigerating head, and a heating module configured on the refrigerant return pipe to heat up the refrigerant inside the refrigerant return pipe. The refrigerant return pipe is configured with a heating module to heat up the refrigerant inside the pipe, and the heating can remove the frozen state of the refrigerant return pipe to recover the original flexibility and function of the refrigerant return pipe, thus avoiding the problem wherein the refrigerant return pipe is frozen and gets brittle under the low temperature, and breakage due to the high-speed reciprocating motion of the refrigerating head left and right, back and forth, or up and down.

A thermal storage container is coupled to a pump for circulating cooled liquid from the thermal storage container in at least one of two circuits. One circuit includes a heat exchanger coupled to the fresh food evaporator for assisting in cooling the fresh food section of the refrigerator or for chilling the liquid. Another circuit includes a sub-cooler between the condenser and the evaporator for cooling the output from the condenser before entering the evaporator, hereby increasing the efficiency of the system. A three-way valve is coupled from the output pump to couple the stored coolant selectively to one or the other or both of the coolant circuits.

A cascade refrigeration system having a first refrigeration stage that defines a first fluid circuit and includes a first expansion device and a second refrigeration stage that defines a second fluid circuit, fluidically isolated from the first fluid circuit, that includes a second expansion device. The second expansion device includes a first capillary tube and a second capillary tube in parallel flow arrangement, and a second stage valve in fluid communication with the second capillary tube for selectively controlling flow of the second refrigerant through the second capillary tube in response to at least one operating condition of the refrigeration system without interrupting flow of the second refrigerant through the first capillary tube. The refrigeration system further includes at least one interstage heat exchanger in heat transferring communication with the first and second fluid circuits to exchange heat between the first and second refrigerants.

A refrigeration appliance, in particular a domestic refrigeration appliance, has at least one refrigeration compartment for accommodating refrigerated goods and a refrigerant circuit. The refrigerant circuit has a condenser, an evaporator for cooling the refrigeration compartment, the evaporator being thermally coupled to the at least one refrigeration compartment and connected to the condenser, a dryer, which is arranged between the condenser and the evaporator, and a valve device, which is connected by an intermediate capillary tube to the dryer and by a throttle capillary tube to the evaporator.