Air conditioning unit and control method for same

Abstract

The invention discloses an air conditioning unit and a control method for the same and relates to the technical field of air conditioning. An outdoor heat exchanger comprises two or more outdoor heat exchange devices. A compressor, a four-way valve, an indoor heat exchanger, a throttling device and the two or more heat exchange devices are connected to form a refrigerant loop. The refrigerant loop is internally provided with a first control valve unit. The compressor and the two or more outdoor heat exchange devices are connected to form a defrosting loop. The defrosting loop is internally provided with a second control valve unit. According to the air conditioning unit and the control method for the same, heating and defrosting of the air conditioning unit are conducted at the same time through control valves; in addition, in the defrosting process, the four-way valve does not reverse; by means of heat, generated in the operation process of the compressor, of a shell, liquid refrigerant obtained after defrosting is evaporated; meanwhile, through variable diameter throttling design of pipes, waste heat of a cylinder body of the compressor can be effectively utilized; and meanwhile, heat dissipation of the compressor can be enhanced, the temperature of an indoor environment can be maintained not to be lowered, and user experience is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioning unit and a control method for the air conditioning unit. Background technique [0002] In the prior art, when the air-conditioning unit defrosts, the air-conditioning unit is usually switched to the cooling mode by switching the four-way valve during the heating operation of the air-conditioning unit. During defrosting, the outdoor heat exchanger acts as a condenser, the indoor heat exchanger acts as an evaporator, both the indoor and outdoor fans stop running, the compressor is adjusted to the set defrosting frequency, and the discharged high-temperature and high-pressure refrigerant enters the outdoor heat exchanger through the four-way valve. In the heat exchanger, defrost the outdoor heat exchanger. Since the indoor fan stops running during defrosting, the operation mode of the air conditioning unit is cooling, the indoor heat exchanger acts as a...

AI Technical Summary

Problems solved by technology

Since the indoor fan stops running during defrosting, the operation mode of the air conditioning unit is cooling, the indoor heat exchanger acts as an evaporator during defrosting, and the temperature is low, and the defrosting process will last for several minutes, during which it will Causes indoor ambient temperature to drop, affecting user comfort

In addition, air-conditioning units can also use heat storage materials to defrost, and the four-way valve does not change direction, but the design cost of heat storage materials and related structures used in this method is relatively high, and the promotion area is narrow

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