Abstract: A dish washer includes: a washing tank including a sump at a bottom surface thereof; a water storage unit disposed inside or outside the washing tank to store washing water to be supplied to the washing tank; a heat pump system including a compressor that compresses and circulates refrigerant, a first heat exchanger disposed in the sump, an expansion apparatus, and a second heat exchanger disposed in the water storage unit to heat washing water for washing the dishes; and a reverse valve that changes a flow of refrigerant flowing through each of the first heat exchanger and the second heat exchanger to allow each of the first heat exchanger and the second heat exchanger to be switched from each other between a heating mode for heating the washing water and a heat recovery mode for recovering heat from washing water discharged to the outside from the washing tank.

Abstract: The present disclosure relates to a dishwasher having a heat pump, including a dishwasher body provided with a tub configured with a washing space therein and a sump provided at a bottom of the tub to temporarily accommodate washing water; a heat pump having a compressor, an evaporator, an expansion apparatus, and a sump condenser provided inside the sump to exchange heat with washing water inside the sump; and a controller that controls the heat pump to be driven so as to increase the temperature of the washing water inside the sump. As a result, a heating time of washing water may be shortened, thereby suppressing washing time from being prolonged.

Abstract: The present disclosure relates to a dish washer having a heat pump, and the dish washer may include a washing tank provided with a sump at a bottom surface thereof and provided with an accommodation space for storing dishes therein; a heat pump system provided with an evaporator, a compressor that compresses and circulates refrigerant, a condenser that heats washing water for washing the dishes, and an expansion apparatus; and a heat exchange system that exchanges heat between water for heat transfer to the refrigerant and the evaporator, thereby enhancing the heat exchange performance and efficiency of the evaporator.

Abstract: The present disclosure relates to a dishwasher having a heat pump, including a dishwasher body provided with a tub configured with a washing space therein and a sump provided at a bottom of the tub to temporarily accommodate washing water; a washing water storage unit provided in the dishwasher body to store washing water therein; a heat pump having a compressor, an evaporator, an expansion apparatus, and a condenser provided to exchange heat with the washing water of the washing water storage unit; and a controller that controls the heat pump to increase the temperature of the washing water of the washing water storage unit. As a result, a heating time of washing water may be shortened, thereby suppressing a time required for washing dishes from being prolonged.

Abstract: A method for controlling a dish washer includes: supplying washing water to a water storage unit; delivering washing water from the water storage unit to the washing tank; heating washing water in the sump by a first heat exchanger disposed in the sump; injecting heated washing water through an injection arm; recovering heat from heated washing water by the first heat exchanger and transferring heat to a second heat exchanger disposed in the water storage unit after completion of washing; and discharging washing water cooled by the first heat exchanger from the sump to an outside. The dish washer includes a heat pump system including the first heat exchanger, the second heat exchanger, an expansion apparatus, that expands refrigerant received from the first heat exchanger or the second heat exchanger, a compressor that compresses and circulates refrigerant received from the first heat exchanger or the second heat exchanger.

Abstract: The present disclosure relates to a dishwasher having a heat pump, including a dishwasher body provided with a tub configured with a washing space therein and a sump provided at a bottom of the tub to temporarily accommodate washing water; a heat pump having a compressor, an evaporator, an expansion apparatus, and a condenser provided on an inner bottom surface of the tub to exchange heat with washing water inside the tub; and a controller that controls the heat pump to be driven to increase the temperature of the washing water inside the tub. As a result, the heating time of washing water may be shortened.

Abstract: The present disclosure relates to a dish washer having a heat pump, and the dish washer may include a washing tank having an accommodation space for storing dishes therein; an injection arm disposed inside the washing tank, and provided with a plurality of nozzles to inject washing water or air to the dishes according to a washing stroke and a drying stroke; a duct unit that defines a passage for delivering air to the injection arm; a suction fan that suctions the air and supplies the air to the injection arm; and an air heating element provided inside the duct unit to heat the air to be supplied to the injection arm, wherein the injection arm is rotatably mounted about a rotary shaft, and the plurality of nozzles rotate the injection arm by a pressure that injects the air.

Abstract: A dishwasher includes: a dishwasher body including a tub that defines a washing space and a sump disposed vertically below the tub and configured to accommodate washing water; a heat pump including a compressor, a condenser, an expansion apparatus, and an evaporator; a drain storage unit connected to a drain pipe of the sump and configured to receive washing water discharged from the sump; a drain pipe open-close valve that opens and closes the drain pipe; and a controller that controls the heat pump and the drain pipe open-close valve. The evaporator is configured to exchange heat with the drain storage unit, and the controller controls the drain pipe open-close valve to open the drain pipe to move washing water of the sump to the drain storage unit when the sump is drained.

Abstract: A dish washer includes: a washing tank having an accommodation space for storing dishes therein; an injection arm disposed inside the washing tank, and provided with a plurality of nozzles to selectively inject washing water and air to the dishes according to a washing stroke and a drying stroke; a duct unit that defines a passage for delivering the air to the injection arm; a suction fan provided inside the duct unit to suction the air and supply the air to the injection arm; and an air heating element that heats the air to be supplied to the injection arm.

Abstract: A dish washer includes a washing tank having an accommodation space for storing dishes therein; an injection arm disposed inside the washing tank, and provided with a plurality of nozzles to selectively inject washing water and air to the dishes according to a washing operation and a drying operation; a duct unit that defines a passage of the air to be supplied to the injection arm; a suction fan provided inside the duct unit to suction the air and supply the air to the injection arm; and an air heating element that heats the air to be supplied to the injection arm, wherein the injection arm includes a partition wall that partitions a washing water passage and an air passage therein.

Abstract: 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.

Abstract: The present disclosure relates to a dishwasher having a heat pump, including a dishwasher body provided with a tub configured with a washing space therein and a sump provided at a bottom of the tub to temporarily accommodate washing water; a spray arm provided inside the washing space to spray washing water; a circulation pump that pumps the washing water of the sump; a washing water guide that guides the washing water pumped by the circulation pump to the spray arm; a heat pump provided with a compressor, an evaporator, an expansion apparatus, and a condenser provided to exchange heat in contact with the washing water of the washing water guide; and a controller that controls the heat pump to increase the temperature of the washing water of the washing water guide. As a result, it may be possible to suppress heat loss from being generated while heating washing water.

Abstract: The present disclosure relates to a dish washer having a heat pump, and the dish washer may include a washing tank having an accommodation space for storing dishes therein; an injection arm disposed inside the washing tank, and provided with a plurality of nozzles to inject washing water or air to the dishes according to a washing stroke and a drying stroke; a duct unit that defines a passage for delivering air to the injection arm; a suction fan that suctions the air and supplies the air to the injection arm; and an air heating element provided inside the duct unit to heat the air to be supplied to the injection arm, wherein the injection arm is rotatably mounted about a rotary shaft, and the plurality of nozzles rotate the injection arm by a pressure that injects the air.

Abstract: The present disclosure relates to a dish washer having a heat pump, and the dish washer may include a washing tank provided with a sump at a bottom surface thereof and provided with an accommodation space for storing dishes therein; a heat pump system provided with an evaporator, a compressor that compresses and circulates refrigerant, a condenser that heats washing water for washing the dishes, and an expansion apparatus; and a heat exchange system that exchanges heat between water for heat transfer to the refrigerant and the evaporator, thereby enhancing the heat exchange performance and efficiency of the evaporator.

Abstract: 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.

Abstract: The present disclosure relates to a dishwasher having a heat pump, including a dishwasher body provided with a tub configured with a washing space therein and a sump provided at a bottom of the tub to temporarily accommodate washing water; a heat pump having a compressor, an evaporator, an expansion apparatus, and a condenser provided on an inner bottom surface of the tub to exchange heat with washing water inside the tub; and a controller that controls the heat pump to be driven to increase the temperature of the washing water inside the tub. As a result, the heating time of washing water may be shortened.

Abstract: The present disclosure relates to a dishwasher having a heat pump, including a dishwasher body provided with a tub configured with a washing space therein and a sump provided at a bottom of the tub to temporarily accommodate washing water; a washing water storage unit provided in the dishwasher body to store washing water therein; a heat pump having a compressor, an evaporator, an expansion apparatus, and a condenser provided to exchange heat with the washing water of the washing water storage unit; and a controller that controls the heat pump to increase the temperature of the washing water of the washing water storage unit. As a result, a heating time of washing water may be shortened, thereby suppressing a time required for washing dishes from being prolonged.

Abstract: A dishwasher includes: a dishwasher body including a tub that defines a washing space and a sump disposed vertically below the tub and configured to accommodate washing water; a heat pump including a compressor, a condenser, an expansion apparatus, and an evaporator; a drain storage unit connected to a drain pipe of the sump and configured to receive washing water discharged from the sump; a drain pipe open-close valve that opens and closes the drain pipe; and a controller that controls the heat pump and the drain pipe open-close valve. The evaporator is configured to exchange heat with the drain storage unit, and the controller controls the drain pipe open-close valve to open the drain pipe to move washing water of the sump to the drain storage unit when the sump is drained.

Abstract: A dish washer includes: a washing tank having an accommodation space for storing dishes therein; an injection arm disposed inside the washing tank, and provided with a plurality of nozzles to selectively inject washing water and air to the dishes according to a washing stroke and a drying stroke; a duct unit that defines a passage for delivering the air to the injection arm; a suction fan provided inside the duct unit to suction the air and supply the air to the injection arm; and an air heating element that heats the air to be supplied to the injection arm.

Abstract: A method for controlling a dish washer includes: supplying washing water to a water storage unit; delivering washing water from the water storage unit to the washing tank; heating washing water in the sump by a first heat exchanger disposed in the sump; injecting heated washing water through an injection arm; recovering heat from heated washing water by the first heat exchanger and transferring heat to a second heat exchanger disposed in the water storage unit after completion of washing; and discharging washing water cooled by the first heat exchanger from the sump to an outside. The dish washer includes a heat pump system including the first heat exchanger, the second heat exchanger, an expansion apparatus, that expands refrigerant received from the first heat exchanger or the second heat exchanger, a compressor that compresses and circulates refrigerant received from the first heat exchanger or the second heat exchanger.