Air conditioner outdoor unit, air conditioner and air conditioner outdoor unit defrosting method

Abstract

The invention discloses an air conditioner outdoor unit, an air conditioner and an air conditioner outdoor unit defrosting method, and relates to the field of air conditioners, and the air conditioner outdoor unit defrosting method is used for defrosting of the air conditioner outdoor unit. The air conditioner outdoor unit comprises an outdoor heat exchanger, axial-flow fan blades and a dehumidification device. The dehumidification device is located at the upstream part in the air flowing direction of the outdoor heat exchanger and used for reducing the moisture in outdoor air driven by the axial flow fan blades and used for flowing to the outdoor heat exchanger. According to the above technical scheme, when the air conditioner is under the low-temperature heating work condition, the dehumidification device is utilized for conducting dehumidifying and drying treatment on the outdoor side inflow air, the dew point temperature of air exchanging heat with the outdoor heat exchanger is reduced, the evaporation temperature of the outdoor heat exchanger is higher than the dew point temperature of air in the heating process, and therefore no condensate water is condensed on the outdoor heat exchanger, and frosting cannot happen.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an outdoor unit of an air conditioner, an air conditioner and a method for defrosting the outdoor unit of the air conditioner. Background technique [0002] When the air conditioner is in the low-temperature heating condition, the condensed water will frost on the outdoor heat exchanger. In the prior art, the following two methods are used to defrost the outdoor heat exchanger: [0003] 1. Turn the air conditioner from heating mode to defrosting mode to defrost, and then discharge the condensed water to the outside. During the defrosting mode, the four-way valve changes direction, the fan stops working, and the air conditioner switches from heating to cooling. After the defrosting is over, the heating is turned on again, and then the internal fan is turned on. [0004] 2. Use electric heating to defrost. This method is often used on integral PTAC through-the-wall units or air ...

AI Technical Summary

Problems solved by technology

Under low temperature conditions, the ambient temperature is low, so the water discharged into the outer box will accumulate and freeze, affecting the drainage of the whole machine, and the fan blades may be frozen

[0005] The inventors found that there are at least the following problems in the prior art: using the defrosting mode for defrosting, the air conditioner does not heat continuously, and the customer experience is poor; The water in the outer box will accumulate and freeze, which will affect the drainage of the whole machine, and the fan blades may be frozen

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