A heat pump washing and drying machine and drying method

Abstract

The invention discloses a heat pump washing and drying integrated machine and a drying method. The heat pump washing and drying integrated machine includes a drum, a heat pump module, and a drying air duct connecting the drum and the heat pump module, and also includes a hot air duct that can pass hot air generated by the heat pump module into The low-temperature auxiliary air duct for heating the working environment of the evaporator, and the air duct switching mechanism for controlling the hot air generated by the heat pump module to flow into the drying air duct and / or the low-temperature auxiliary air duct. At the beginning of drying, if the detected temperature is lower than the set temperature, use its own heat pump to heat the hot air through the low-temperature auxiliary air channel into the heat pump module to increase the working environment temperature of the evaporator. The set temperature is to ensure that the refrigerant in the evaporator The temperature at which complete evaporation and no frost occurs; during the drying process, according to the detected temperature, the air volume of the hot air flowing into the low-temperature auxiliary air duct and the drying air duct is adjusted by controlling the air duct switching mechanism. The invention solves the problem of low drying efficiency in low temperature environment, saves drying time and improves drying efficiency.

Description

technical field [0001] The invention relates to a clothes drying device and a clothes drying method, in particular to a heat pump washing and drying integrated machine and a drying method that can better dry clothes in a low temperature environment. Background technique [0002] The following air circulation channel is arranged in the existing heat pump type clothes drying device: the heated air heated by the condenser in the heat pump cycle system is sent into the drying room containing the clothes, and the moist air which has taken moisture from the clothes is It is sent back to the evaporator for dehumidification, and the dehumidified air is heated by the condenser again and sent to the drying chamber. [0003] Chinese Patent Application No. 200610153406.9 discloses a clothes drying device capable of stabilizing the operation of a heat pump generating drying air circulating between the drying chamber and the heat pump. Among them, the air heated by the heater in the heat...

AI Technical Summary

Problems solved by technology

Since the heat of the drying air comes from the power input of the compressor system, the temperature rise in the laundry and drying clothes is also extremely slow, which is not conducive to the efficiency of drying clothes; in addition, the evaporator works in a low temperature environment below 0°C for a long time, In contact with the humid air blown out of the drum, a large amount of frost will condense on the surface of the fins of the evaporator, the effective area of ​​the evaporator will be reduced, and the circulation of the wind in the circulating air path will be blocked, so that the refrigerant in the compressor system cannot be completely vaporized in the evaporator , the refrigerant in the liquid state enters the compressor along the compressor suction pipe, causing compressor failure

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