Air conditioning system and control method thereof

Abstract

The invention discloses an air conditioning system. The air conditioning system comprises a compressor, a first indoor heat exchanger, a second indoor heat exchanger, a first outdoor heat exchanger, a second outdoor heat exchanger, a first valve body, a second valve body and a controller, wherein an air exhaust port and an air return port of the compressor are connected with the first valve body and the second valve body separately, the first end of the first indoor heat exchanger is connected with the second valve body, and the second end of the first indoor heat exchanger is connected with the second end of the second outdoor heat exchanger; the first end of the second indoor heat exchanger and the first end and the second end of the first outdoor heat exchanger are connected with the first valve body; the second end of the first outdoor heat exchanger is connected with the first valve body, and the first end of the second outdoor heat exchanger is connected with the second valve body; and the controller is used for correspondingly controlling the opening-closing states of the first valve body and the second valve body while receiving a running mode instruction, so as to start the corresponding running mode. The invention further discloses a control method for an air conditioning system. The air conditioning system disclosed by the invention is capable of rapidly completing a defrosting mode or a dehumidification mode, and also capable of preventing the drop of the indoor environment temperature.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioning system and a control method thereof. Background technique [0002] At present, heat pump air-conditioning systems generally use two methods for defrosting, one of which is reverse cycle (refrigeration cycle) for defrosting, and its operating mechanism can be simplified as: enter defrosting mode-compressor stop-four-way valve reversing- Compressor start-defrost-compressor stop-four-way valve reversing-compressor start-defrost end, the defect of this scheme is that the room needs to absorb part of the heat during defrosting, resulting in a drop in room temperature, which seriously affects the Indoor comfort; the other is hot gas bypass defrosting, which uses the exhaust heat of the compressor to increase the inlet temperature of the outdoor heat exchanger during heating. The defect of this scheme is that the defrosting time is long. While in the dehumi...

AI Technical Summary

Problems solved by technology

[0002] At present, heat pump air-conditioning systems generally use two methods for defrosting, one of which is reverse cycle (refrigeration cycle) for defrosting, and its operating mechanism can be simplified as: enter defrosting mode-compressor stop-four-way valve reversing- Compressor start-defrost-compressor stop-four-way valve reversing-compressor start-defrost end, the defect of this scheme is that the room needs to absorb part of the heat during defrosting, resulting in a drop in room temperature, which seriously affects the Indoor comfort; the other is hot gas bypass defrosting, which uses the exhaust heat of the compressor to increase the inlet temperature of the outdoor heat exchanger during heating. The defect of this scheme is that the defrosting time is long

While in the dehumidification mode, since the air conditioning system uses the surface temperature of the evaporator to be lower than the dew point temperature of the indoor air at this pressure for dehumidification, in order to complete rapid dehumidification, the indoor temperature will drop significantly, thereby greatly reducing the user's experience

Images