Abstract: A clothes dryer comprises an inner drum, an outer drum, an air heating and supplying means and an air duct, and at least two air chambers each in communication with the air duct. The air chambers are respectively arranged corresponding to two sides along which clothes rise or fall as the inner drum rotates, the air chamber at one side starts supplying air and the air chamber at the other side stops supplying air according to a rotation direction of the inner drum, all air chambers are distributed in the order of front and rear of the outer drum in an axial direction, and the rotation direction of the inner drum is controlled according to the distribution of the air chambers, such that air is supplied in different positions corresponding to the front part and the rear part of the inner drum at different clothes drying stages, in order to dry clothes.

Abstract: 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.

Abstract: Disclosed are an impeller-type heat pump integrated washer-dryer and a drying method. The impeller-type heat pump integrated washer-dryer includes: a housing, an outer drum mounted inside the housing, an inner drum mounted in the outer drum, an impeller provided at the bottom of the inner drum, and an electric motor provided at the lower part of the outer drum for driving of the inner drum and/or the pulsator. An outer part of the outer drum is provided with an air duct and a heat pump system. The air duct communicates with sealed top and bottom ends of the outer drum. The heat pump system has an evaporator and a condenser mounted in the air duct, a throttle apparatus and a compressor. The evaporator, the compressor, the condenser and the throttle apparatus are sequentially connected in succession to form a circulating flow path enabling a medium to flow.

Abstract: The present invention relates to a control method for a laundry dryer. The laundry dryer is a heat-pump type laundry dryer and a compressor of the laundry dryer is a variable-frequency compressor. The control method includes setting a minimum running frequency of the compressor according to an amount of clothes to be dried, where the more the clothes are, the larger the set minimum running frequency is. Specifically, when laundry drying is started, the amount of the clothes being dried is detected. According to the detected information, a minimum running frequency of the compressor, corresponding to the information, is invoked, and the minimum running frequency of the compressor in the current laundry drying process is set.

Abstract: An external air-cooled heat exchanger includes two air channels going towards different directions and not connecting with each other, a condensing wind channel and an external air channel. Each air channel has a plurality of air chambers that are alternately arranged so that between each two neighboring air chambers of the same air channel is an air chamber of the other air channel change to a period; A clothes dryer includes an air outlet connected to the heat exchanger. The heat exchanger is connected to a water collection box, the water collection box is connected to an air inlet, a filter is arranged between the air outlet and the heat exchanger, and a drying fan and the heating unit are arranged between the water collection box and the air inlet.