A high efficiency vented dryer having a heat pump system comprises an outer drum, an air-intake drying air duct and an air-exhaust drying air duct for allowing the outer drum communicating with outside. The dryer is provided with a heat pump system comprising a first evaporator and a second evaporator arranged in parallel or in series. The first evaporator is arranged in the air-exhaust drying air duct and the second evaporator is arranged in an external atmosphere to absorb heat from the exhaust air and outside, respectively. By arranging the evaporators in the drying air duct and the external atmosphere respectively, the heat pump system can simultaneously or independently absorb heat from the air exhausted by the dryer and from the ambient air of the dryer to heat the intake air by using heat in the exhaust air and heat in the environment to improve drying rate of the dryer.

A laundry appliance includes a blower that directs process air along an airflow path. An evaporator dehumidifies the process air and removes condensate from the process air. A heat exchange plate is disposed within the airflow path and supports the evaporator from below and within the airflow path. The heat exchange plate receives the condensate from the process air. A sloped area of the heat exchange plate directs the condensate downward and along the heat exchange plate to a condensate drain, wherein the sloped area includes a directing surface that blocks the process air from pushing the condensate upward and away from the condensate drain.

The present invention relates to a clothes dryer, including a drum, a heat pump cycle having a first evaporator, a compressor and a condenser, and a blower for circulating air, wherein the heat pump cycle includes second to nth evaporators disposed in series with the first evaporator within an air duct; an auxiliary heat exchanger to cool refrigerant discharged from the condenser, and first to nth expansion valves to independently control flow rates of refrigerants flowing into the first to nth evaporators, wherein the dryer further includes a controller to control the compressor according to refrigerant discharge pressure of the compressor or refrigerant inlet pressure of the condenser.

A heat pump clothes dryer comprising a circulating air path consisting of a drying drum and a drying air path for circularly flowing drying air; and a heat pump system consisting of an evaporator, a throttling device, a condenser and a compressor successively connected end to end for circularly flowing a refrigerant medium. The condenser and the evaporator are disposed on the drying air path, and perform heat exchange with the drying air. The compressor has independent suction compression chambers, each suction compression chamber being switchably connected in series or in parallel. When the dryer starts drying in a low-temperature environment, the suction compression chambers of the compressor operate in a parallel state, so that the air displacement of the compressor is increased to improve the flowing activity of the refrigerant medium in the heat pump system, so as to avoid occurrence of frosting of the evaporator.

A control method of a laundry treatment apparatus is disclosed which includes a course setting procedure receiving a control command including RPM control data of an impeller, RPM control data of a compressor or opening degree control data of an expansion valve, a hot air supply procedure for supplying heated air to a drum through control of the impeller, compressor and expansion valve, a temperature measurement procedure measuring temperature of air introduced into the drum during execution of the hot air supply procedure, a first control procedure for controlling the impeller, compressor and expansion valve based on the control command when the measured temperature is equal to or higher than a reference temperature, and a second control procedure controlling the impeller, compressor and expansion valve based on a control command different from the control command set in the course setting procedure when the measured temperature is lower than the reference temperature.

The present disclosure provides a flushing device and method for an evaporator of dryer, and a dryer. The flushing device comprises an evaporator, a water storage box and a condensate water pan for collecting condensate water, wherein an eccentric bucket is arranged between the water storage box and the evaporator, a supporting structure is arranged at two symmetrical sides of a periphery of the eccentric bucket, the supporting structure enables the eccentric bucket to turn over along with a change in the center of gravity of the eccentric bucket, a pipeline for conveying condensate water to the eccentric bucket is arranged between the eccentric bucket and the condensate water pan, an opening of the eccentric bucket is arranged upwards, and after the eccentric bucket is turned over, the opening of the eccentric bucket is aligned with the evaporator, such that condensate water in the eccentric bucket flushes the evaporator.

A laundry treatment apparatus dries laundry by sending air to the laundry while the laundry is hung on a hanger, and dehumidifies surrounding air of the laundry to reduce a drying time of the laundry. The laundry treatment apparatus of the present disclosure includes: a cabinet which has an air inlet; a dehumidifying unit which is provided inside the cabinet, and dehumidifies air suctioned into the cabinet through the air inlet; a first blower unit which is provided at a top portion of the cabinet, and discharges the air dehumidified in the cabinet by the dehumidifying unit; and a second blower unit which is provided over the cabinet with a distance therebetween, has a hanging part on which a hanger is hung, and suctions air to send the air to the laundry hung on the hanger.

Provided are a washing drying machine having a heat pump, and a drying operation control method thereof. The washing drying machine having a heat pump includes a cabinet; a tub provided in the cabinet; a drum rotatably provided in the tub; a circulation passage configured to connect a first portion of the tub to a second portion of the tub; a circulation fan provided at the circulation passage and configured to circulate air through the circulation passage and the tub; the heat pump having a compressor that compresses a refrigerant and a heat exchanger that exchanges heat with the air of the circulation passage and the refrigerant; a heater configured to heat an inside of the tub; and a controller configured to control the heater to be supplied with power in order to heat the inside of the tub before the compressor is operated during a drying course.

A washing and drying system is disclosed. The system includes a washing machine that has a washing function. The system further includes a dryer that has a drying function. The dryer includes a drying unit that is configured to increase a temperature within a drying chamber that is configured to receive clothing. The dryer further includes a controller that is configured to set a capacity of the drying unit according to an operation termination time of the washing machine based on operation of the washing machine, and operate the drying unit according to the set capacity.

Disclosed is a control method for laundry treating apparatus configured to perform a dry cycle for clothes by operating a heat pump comprising: a measuring step for measuring a temperature of a refrigerant and a temperature of air which pass through an evaporator to exchange heat; a comparing step for comparing a difference between the measured temperatures of the refrigerant and air with a preset reference temperature; and an adjusting step for adjusting an opening degree of the expansion valve according to the result of the comparing step.