Outdoor unit, air conditioning system and control method

Abstract

The invention provides an outdoor unit, an air conditioning system and a control method. The outdoor unit comprises a first connecting pipe and a second connecting pipe, wherein the first connecting pipe and the second connecting pipe communicate with an indoor unit. The outdoor unit further comprises a compressor, two heat exchangers, two reversing valves and two throttling devices. Each heat exchanger communicates with the corresponding reversing valve. According to the outdoor unit, the air conditioning system and the control method, by means of the two heat exchangers, when a defrosting process of the air conditioner outdoor unit starts, part of high-temperature refrigerant enters the indoor unit, and the indoor unit does not stop but conducts heating continuously when defrosting is conducted through the outdoor unit, so that the heating capacity of a machine set is strongly guaranteed; the air outlet temperature and comfort of the indoor side are maintained, and in addition, onlythe first heat exchanger is adopted to work under the circumstance of high-temperature heating or low-temperature cooling; the high pressure and the lower pressure of the system are adjusted properly;and reliability and comfort of the machine set are guaranteed better.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to an outdoor unit, an air-conditioning system and a control method. Background technique [0002] At present, with the rapid economic development, multi-split units have been widely promoted and used, and can be seen everywhere in large places such as hospitals, supermarkets, and stadiums. In coastal areas, the climate is humid in winter and the air humidity is relatively high. The outdoor unit of the air conditioner is in such a humid environment. During the heating operation, the frosting frequency of the outdoor unit is very high, and the indoor unit will be shut down in order to prevent the cold air from blowing inside during the defrosting process, which will greatly reduce the heating effect in the room. Contents of the invention [0003] In order to solve the above technical problems, an outdoor unit, an air conditioning system and a control method for n...

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Problems solved by technology

[0002] At present, with the rapid economic development, multi-split units have been widely promoted and used, and can be seen everywhere in large places such as hospitals, supermarkets, and stadiums. In coastal areas, the climate is humid in winter and the air humidity is relatively high. The outdoor unit of the air conditioner is in such a humid environment. During the heating operation, the frosting frequency of the outdoor unit is very high, and the indoor unit will be shut down in order to prevent the cold air from blowing inside during the defrosting process, which will greatly reduce the heating effect in the room

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