A dual-temperature air-conditioning system, control method, and air conditioner

Abstract

The present application provides a dual-temperature air-conditioning system, a control method, and an air conditioner. The dual-temperature air-conditioning system includes: a compressor, an outdoor heat exchanger, a first indoor heat exchanger and a second indoor heat exchanger; the first pipeline and the second pipeline are connected to the outdoor heat exchange through the third pipeline device, a first throttling device is set on the third pipeline, and a second throttling device is set on the second pipeline; the opening degree of the second throttling device is fixed, and the opening degree of the first throttling device can be changed from the preset Select the corresponding opening reference and opening upper and lower limits from the opening table of the throttling device, and control and adjust according to the first exhaust temperature or the second exhaust temperature of the compressor; or, according to the third row of the compressor The third exhaust gas temperature at the air port is controlled and adjusted. According to the present application, the stable control of the two throttling devices in the dual-temperature air-conditioning system can be realized, and the stable, reliable and efficient operation of the dual-temperature air-conditioning system can be ensured.

Description

technical field

[0001] The present application relates to the technical field of air conditioning, in particular to a dual-temperature air conditioning system, a control method, and an air conditioner. Background technique

[0002] Existing air-conditioning systems usually use a single-suction single-row compressor, which forms a refrigeration cycle with indoor and outdoor single-row or multi-row heat exchangers to heat or cool indoor air to meet the comfort requirements of the indoor environment. Since the air conditioning system has only one pair of suction and exhaust ports connected to the indoor and outdoor heat exchangers, only one evaporation temperature and condensation temperature can be realized. In order to realize cascaded heating or cooling of indoor air, the patent application number CN105444453A proposes a dual-temperature air-conditioning system with dual-cylinder parallel compressors to improve system energy efficiency and slow down the energy efficiency dec...

Images