Washer-dryer and control method

Abstract

An efficient washer-dryer and a control method are provided. The efficient washer-dryer comprises a laundry accommodating drum, a drying air duct arranged outside and communicated with the laundry accommodating drum, and a condensing device provided with a heat-absorbing portion and a heat-releasing portion. The heat-absorbing portion is arranged in the drying air duct, and the heat-releasing portion is arranged outside the drying air duct. At least a nozzle spraying water towards the condensing device and a drain outlet communicated with an exterior of the drying air duct are arranged inside the drying air duct. The control method of the washer-dryer comprises: at least after a drying process, supplying water to the nozzle to flush the dirt attached on the condensing device, and discharging flushed water and dirt out of the drying air duct through the drain outlet. The condensing efficiency of the washer-dryer is significantly improved, drying time is shortened.

1 . An washer-dryer, comprising a laundry accommodating drum, a drying air duct arranged outside and communicated with the laundry accommodating drum, and a condensing device, wherein,
 the condensing device is provided with a heat-absorbing portion and a heat-releasing portion, the heat-absorbing portion is arranged in the drying air duct to absorb heat of air in the drying air duct and condense moisture of air,   the heat-releasing portion is arranged outside the drying air duct to dissipate the heat absorbed by the heat-absorbing portion;   the drying air duct are at least provided with a nozzle and a drain outlet inside, the nozzle is for spraying water to the heat-absorbing portion of the condensing device, and the drain outlet is communicated with an exterior of the drying air duct.   
     
     
         2 . The washer-dryer according to  claim 1 , wherein the condensing device comprises a heat pipe group with an evaporation section and a condensation section, a first heat exchanger sheet group arranged in the evaporation section of the heat pipe group, and a second heat exchanger sheet group arranged in the condensation section of the heat pipe group,
 the evaporation section and the first heat exchanger sheet group form the heat-absorbing portion of the condensing device, and the condensation section and the second heat exchanger sheet group form the heat-releasing portion of the condensing device.   
     
     
         3 . The washer-dryer according to  claim 2 , wherein a heat exchanger sheet of the first heat exchanger sheet group is vertically and uniformly distributed inside the drying air duct, the nozzle is arranged above the first heat exchanger sheet group, and a flowing direction of a water outlet of the nozzle is parallel to the heat exchanger sheet, a water inlet of the nozzle is arranged outside the drying air duct to connect with a water supply pipe of the washer-dryer. 
     
     
         4 . The washer-dryer according to  claim 3 , wherein a guiding structure is arranged at the water outlet of the nozzle for allowing water from the water outlet to fully cover the heat exchanger sheet. 
     
     
         5 . The washer-dryer according to  claim 2 , wherein the drying air duct is provided with an air supply opening and an air return opening, the air supply opening and the air return opening are arranged at diagonal positions of the laundry accommodating drum, both the evaporation section of the heat pipe group and the first heat exchanger sheet group are arranged in a section of the drying air duct near to the air return opening. 
     
     
         6 . The washer-dryer according to  claim 2 , wherein, the condensing device further comprises a heat-dissipating fan, and the heat-dissipating fan is arranged at the condensation section of the heat pipe group and the second heat exchanger sheet group for improving the heat dissipation of the condensation section of the heat pipe group and the second heat exchanger sheet group. 
     
     
         7 . The washer-dryer according to  claim 1 , further comprising a heating device arranged in the drying air duct, wherein:
 the heating device is arranged downstream from the condensing device, a fan is arranged in the drying air duct to drive drying air flow to circulate between the drying air duct and the laundry accommodating drum.   
     
     
         8 . A control method of the washer-dryer according to any  claim 1 , comprising:
 at least after a drying process, supplying water to the nozzle to flush dirt attached on the condensing device, and discharging flushing water and the dirt out of the drying air duct through the drain outlet.   
     
     
         9 . The control method of the washer-dryer according to  claim 8 , further comprising:
 firstly heating the flushing water supplied to the nozzle, and/or supplying water to the nozzle in an intermittent manner, before supplying water to the nozzle.   
     
     
         10 . The control method of the washer-dryer according to  claim 1 , comprising:
 supplying water to the nozzle at an earlier stage of drying process, and distributing water to the condensing device to condense moisture of air discharged from the laundry accommodating drum.   
     
     
         11 . The control method of the washer-dryer according to  claim 1 , comprising:
 supplying water to the nozzle at a later stage of drying process, and distributing water to the condensing device to cool the air discharged from the laundry accommodating drum.