Abstract: An air conditioner, and a device and method for preventing cold air during heating of the air conditioner are provided, including: detecting an indoor ambient temperature and an outdoor ambient temperature respectively; determining whether an evaporator inner-tube temperature satisfies an evaporator inner-tube temperature condition, or whether a duration reaches an operating duration, or whether a current intensity continuously reaches a first preset current intensity threshold for a predetermined duration; when if so, starting an inner blower fan at a first preset wind speed; determining whether the evaporator inner-tube temperature satisfies the evaporator inner-tube temperature condition, or whether the current intensity continuously reaches a second preset current intensity threshold for a predetermined duration, or whether a duration, for which the inner blower fan operates at the first preset wind speed, reaches a first preset duration; and if so, switching the inner blower fan to operate at a second pr

Abstract: An air conditioner, and a device and method for preventing cold air during heating of the air conditioner are provided, including: detecting an indoor ambient temperature and an outdoor ambient temperature respectively; determining whether an evaporator inner-tube temperature satisfies an evaporator inner-tube temperature condition, or whether a duration reaches an operating duration, or whether a current intensity continuously reaches a first preset current intensity threshold for a predetermined duration; when if so, starting an inner blower fan at a first preset wind speed; determining whether the evaporator inner-tube temperature satisfies the evaporator inner-tube temperature condition, or whether the current intensity continuously reaches a second preset current intensity threshold for a predetermined duration, or whether a duration, for which the inner blower fan operates at the first preset wind speed, reaches a first preset duration; and if so, switching the inner blower fan to operate at a second pr

Abstract: A dual-stage enthalpy-increasing air-conditioning system comprises a compressor (1), an outdoor heat exchanger (3), a first throttle component (8) and an indoor heat exchanger (11), wherein the components are connected via pipelines; the system also comprises a flash evaporator (6) and a second throttle component (7); a first connecting port of the flash evaporator (6) is connected with a first connecting port of the first throttle component (8); a second connecting port of the first throttle component (8) is connected with the indoor heat exchanger (11); a second connecting port of the flash evaporator (6) is connected with an air supplementing port of the compressor (1); a third connecting port of the flash evaporator (6) is connected with a first connecting port of the second throttle component (7); a second connecting port of the second throttle component (7) is connected with the outdoor heat exchanger (3).

Abstract: A dual-stage enthalpy-increasing air-conditioning system comprises a compressor (1), an outdoor heat exchanger (3), a first throttle component (8) and an indoor heat exchanger (11), wherein the components are connected via pipelines; the system also comprises a flash evaporator (6) and a second throttle component (7); a first connecting port of the flash evaporator (6) is connected with a first connecting port of the first throttle component (8); a second connecting port of the first throttle component (8) is connected with the indoor heat exchanger (11); a second connecting port of the flash evaporator (6) is connected with an air supplementing port of the compressor (1); a third connecting port of the flash evaporator (6) is connected with a first connecting port of the second throttle component (7); a second connecting port of the second throttle component (7) is connected with the outdoor heat exchanger (3).