Lg Electronics Inc.

Youngjoo Shin

Chiwoo Song

Jaewon Lee

Yongcheol Sa

Ilyoong Shin

Ahrae Jo

Soyoon Kim

Jinhyoung Park

Jisung Lee

Woojoo Choi

Jukyoung Lee

A ventilation system according to an embodiment of the present disclosure includes: a plurality of dedicated outdoor air systems, each having one or more temperature sensors and configured to cause outdoor air to flow into an indoor space and indoor air to flow outside thereof; and a controller configured to control the plurality of dedicated outdoor air systems based on temperature data sensed by temperature sensors included in the plurality of dedicated outdoor air systems, wherein the controller: in response to temperature uniformity of the indoor space, in which the plurality of dedicated outdoor air systems are installed, satisfying a predetermined temperature uniformity criterion, controls all the dedicated outdoor air systems to operate in a first operation mode in which the dedicated outdoor air systems operate according to a set temperature; and in response to the temperature uniformity not satisfying the predetermined temperature uniformity criterion, controls the dedicated outdoor air systems to operate in a second operation mode in which at least one dedicated outdoor air system operates in a mode different from that of other dedicated outdoor air systems.

Designated outdoor air system for controlling temperature uniformity within a space

A heat pump and a method for operating a heat pump are provided. The heat pump may include a compressor that compresses a refrigerant, at least one fluid-refrigerant heat exchanger that exchanges heat between the refrigerant and a fluid, such as water, a pump including a motor, the pump forcing the fluid to flow into the at least one fluid-refrigerant heat exchanger, and a controller. The controller may be configured to calculate power consumption of the pump, calculate a flow rate of fluid flowing due to the pump based on the power consumption of the pump, and control an operation of the pump to be stopped when the flow rate of the fluid is less than a predetermined reference flow rate.

Heat pump and method for operating heat pump

A heat pump and a method for operating a heat pump are provided. The heat pump may include an outdoor unit including a compressor that compresses a refrigerant and an outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air, a hybrid unit including at least one fluid-refrigerant heat exchanger that exchanges heat between the refrigerant supplied from the outdoor unit and a fluid, such as water, and at least one refrigerant control valve that controls an amount of refrigerant flowing through the at least one fluid-refrigerant heat exchanger, a plurality of indoor units each including an indoor heat exchanger that exchanges heat between the fluid supplied from the hybrid unit and indoor air, and a controller. The controller may calculate operation loads of the plurality of indoor units and control an opening degree of the at least one refrigerant control value based on the operation loads of the plurality of indoor units.

An air conditioning system may include an outdoor unit including a compressor; at least one distributor connected to the outdoor unit and including a condenser and an evaporator that exchange heat between refrigerant and water; a plurality of heating pipes in communication with the condenser; a plurality of cooling pipes in communication with the evaporator; a plurality of fan coil units connected to the plurality of heating pipes or the plurality of cooling pipes; and a controller configured to perform a heating pipe search operation for matching a portion of the plurality of fan coil units with the plurality of heating pipes, and a cooling pipe search operation for matching another portion of the plurality of fan coil units with the plurality of cooling pipes, in parallel.

Air conditioning system with pipe search

An air conditioning apparatus includes an outdoor device that is configured to circulate refrigerant and that includes a compressor and an outdoor heat exchanger, a plurality of indoor devices configured to circulate water, and a heat exchange device that connects the outdoor device with the indoor device. The heat exchange device includes a heat exchanger configured to exchange heat between the refrigerant and the water, and a switch device configured to control flow of refrigerant between the indoor device and the heat exchanger.

Air conditioning apparatus and control method thereof

An air conditioning apparatus and a method for controlling an air conditioning apparatus are provided. The air conditioning apparatus may include a controller that performs an abnormal operation diagnosis of the air conditioning apparatus based on an output signal of a pump, thereby directly checking introduction of air into pipes or clogging of valves.

Air conditioner with fluid line diagnostics using feedback signals from a pump

An air conditioning apparatus includes: an outdoor unit configured to circulate refrigerant; an indoor unit configured to circulate water; a heat exchange device that connects the indoor unit to the outdoor unit and that is configured to perform heat exchange between the refrigerant and the water; and a plurality of pipes and valves. The heat exchange device includes first and second heat exchangers. The air conditioning apparatus is configured to perform a cooling operation or a heating operation based on operating one or both of the first heat exchanger and the second heat exchanger and one or more of the valves.

Air conditioning apparatus

An air conditioner includes an outdoor heat exchanger in which N heat exchange units are spaced apart from one another sequentially in a vertical direction N expansion valves respectively connected to the N heat exchange units; N hot gas pipes respectively connected to the N heat exchange units; N hot gas valves respectively installed in the N hot gas pipes; and a controller configured to control the N expansion valves and the N hot gas valves to defrost the N heat exchange units, wherein the controller is configured to defrost a bottom heat exchange unit first, then defrost a top heat exchange unit, and defrost the heat exchange units located under the top heat exchange unit sequentially from a second highest heat exchange unit to the bottom heat exchange unit after defrosting the top heat exchange unit.

Growing community of inventors

Seoul, South Korea

Youngjoo Shin