Air conditioning system, air conditioner and control method and control device of air conditioner

Abstract

The invention discloses an air conditioning system, an air conditioner and a control method and a control device of the air conditioner. A throttling device arranged on an auxiliary heat exchange loop is opened to a first opening degree, a high-temperature refrigerant at an exhaust port of a compressor enters the auxiliary heat exchange loop and flows through an auxiliary heat exchanger, so that the auxiliary heat exchanger continuously releases heat, an adjacent outdoor heat exchanger is continuously heated without affecting an original heating mode, and frosting of the outdoor heat exchanger can be prevented or delayed; the opening degree of the throttling device is not fully opened in an initial state, but is gradually opened to a reasonable opening degree suitable for the current environment or gradually opened to the maximum opening degree according to the temperature condition of the outdoor heat exchanger from the first opening degree; and the flow of the refrigerant flowing through the auxiliary heat exchanger is gradually controlled, so that the influence on the stability of the current air conditioning system is small, and the indoor comfort change is small.

Description

technical field [0001] The invention belongs to the field of air conditioning, and more specifically relates to an air conditioning system, an air conditioner, a control method thereof, and a control device. Background technique [0002] At present, the defrosting methods commonly used by air conditioners in the related art include four-way valve reversing defrosting or hot gas bypass auxiliary defrosting. The air conditioner cannot produce heat, which reduces the comfort of the room. However, when hot gas bypass is used to assist defrosting, the outdoor heat exchanger directly bypasses part of the high-temperature and high-pressure steam for defrosting. Energy efficiency is reduced and at the same time, indoor comfort is reduced. [0003] In the technology known to the inventor, there is also a method of defrosting by setting an auxiliary heat exchanger. The auxiliary heat exchanger is arranged on the auxiliary heat exchange circuit and is adjacent to the outdoor heat exc...

AI Technical Summary

Problems solved by technology

However, in the technology known to the above-mentioned inventors, the outdoor heat exchanger will repeat frosting and defrosting, and the auxiliary heat exchanger needs to switch working states back and forth, making the air conditioning system unstable and reducing indoor comfort.

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