Qingdao Hisense Hitachi Air-conditioning Systems Co., Ltd.

Hisense USA Corporation

Hisense International Co., Ltd.

Rui Cao

Wenqiang Zhang

Yajun Li

Min Liu

Yuanpeng Wang

Yongmei Li

Wugong Chi

Leilei Ge

Chengjun He

Wentao Lin

A heat recovery variable-frequency multi-split heat pump system and a control method thereof. The system includes an outdoor unit and at least two indoor units. The system is a three-pipe heating recovery multi-split heat pump system designed on the basis of a four-way reversing valve, and one indoor unit thereof is provided with two electronic expansion valves and two heat exchangers so that any indoor unit in the system can operate independently under three working conditions of refrigeration, heating or heat recovery dehumidification. Under multi-split condition, the system can operate under six working conditions, namely, the full-refrigeration working condition, the full-heating working condition, the common-heat-recovery working condition, the common-heat-recovery-dehumidification working condition, the heat recovery dehumidification-refrigeration-combination working condition and the heat recovery dehumidification-heating-combination working condition. Under the heat recovery dehumidification condition, a lower outlet air temperature, during low-temperature dehumidification, is raised by means of heat removal of a condenser so as to achieve the purpose of dehumidification without temperature fall or temperature rise, so that the thermal comfort and efficiency of the system are improved, and the refrigerating capacity and heating capacity of the system are effectively improved.

Outdoor unit of an air conditioning system, air conditioning system, and control method thereof

Disclosed is an air conditioner heat-radiating circulation system, comprising a compressor (). A discharge pipe of the compressor () is connected to a four-way reversing valve (), which is connected to an outdoor heat exchanger () that is connected to an indoor heat exchanger () via an electronic expansion valve (), the indoor heat exchanger () is connected to a stop value () that is connected to a gas suction pipe of the compressor () via the four-way reversing valve (), the gas suction pipe is provided with a refrigerating circulation branch, which includes a branch electromagnetic valve () that is connected to a flat tube micro-channel aluminum-based radiator () with a temperature sensor (); the gas suction pipe is further provided with a gas suction electromagnetic valve () that is connected in parallel to the branch electromagnetic valve ().

Air conditioner heat-radiating circulation system

Heat recovery variable-frequency multi-split heat pump system and control method thereof

Growing community of inventors

Shandong, China

Rui Cao