Lg Electronics Inc.

Jaeheuk Choi

Yoonho Yoo

Doyong Ha

Byoungjin Ryu

Taehee Kwak

Sangil Park

Juyoun Lee

Kyungrock Kim

Seyoon Oh

The present invention relates to a cooling system for a low temperature storage. The cooling system for the low temperature storage according to an embodiment of the present invention comprises: a first outdoor valve disposed between a compressor and an outdoor heat exchanger and selectively restricting an inflow of a refrigerant into the outdoor heat exchanger; and a first bypass pipe branched from an inlet side of the first outdoor valve and guiding the refrigerant to bypass the outdoor heat exchanger, so that the refrigerant can be guided to bypass the outdoor heat exchanger during defrosting operation of the cooling system.

Cooling system for low temperature storage

An outdoor unit is connected to a refrigerator and has two compressors that are connected in series, and a control method thereof. The outdoor unit according to an embodiment of the present invention includes a low pressure side compressor for compressing a refrigerant; a high pressure side compressor for compressing the refrigerant compressed by the low pressure side compressor; an outdoor heat exchanger for condensing the refrigerant compressed by the high pressure side compressor; a heat recovery unit for cooling the refrigerant condensed in the outdoor heat exchanger by exchanging heat with the refrigerant evaporated in the air conditioner; and a supercooler for expanding a part of the refrigerant cooled in the heat recovery unit to cool another part of the refrigerant cooled in the heat recovery unit, so that the discharge temperature of the low pressure side compressor and/or the high pressure side compressor can be reduced.

Outdoor unit and control method thereof

According to the present disclosure, it is determined whether or not the room is heated according to a temperature difference between a room temperature Tp and a set temperature Ts, and even when there is little or no heating load due to the temperature difference between the room temperature Tp and the set temperature Ts, the floor heating is performed by determining a temperature difference between the room temperature Tp and a floor temperature Tb.

Ceiling type indoor unit of air conditioner

The present invention relates to a heat exchanger. The heat exchanger according to the present invention includes: an outer pipe; a first sub heat exchange part and a second sub heat exchange part which are disposed inside the outer pipe, and in which a second fluid flows around a first fluid pipe through which a first fluid flows; and a main heat exchange part which is disposed, inside the outer pipe, between the first sub heat exchange part and the second sub heat exchange part, and in which the first fluid flows around a plurality of narrow pipes through which the second fluid flows.

Heat exchange apparatus

An air conditioner is disclosed. The air conditioner includes a case having a first and a second indoor suction port and a first and a second indoor discharge port, an air conditioning unit having a first and a second heat exchanger, a first indoor flow channel connected between the first indoor suction port and the first indoor discharge port, a second indoor flow channel connected between the second indoor suction port and the second indoor discharge port, and a condensing unit to receive regenerated air, heat-exchanged with the condenser, from one of the first indoor flow channel and the second indoor flow channel, and perform a heat exchange between the regenerated air and a cooling fluid having a lower temperature than the regenerated air.

Air conditioner

An air conditioner in which a supercooler and a receiver are integrated and the cooling receiver of the air conditioner. The cooling receiver of an air conditioner includes a cooling unit configured to include at least one first refrigerant flow channel through which a refrigerant flows and a second refrigerant flow channel which surrounds the outer circumference of part of the at least one first refrigerant flow channel and through which a refrigerant flows and supercools a refrigerant flowing through the first refrigerant flow channel and a receiver unit configured to have at least one end of the cooling unit disposed in the receiver unit and to store the supercooled refrigerant exiting from the first refrigerant flow channel.

Air conditioner and cooling receiver of air conditioner

Provided is a cascade heat pump. The cascade heat pump includes a first refrigerant cycle including a first compressor and a first indoor heat exchanger, a second refrigerant cycle including a second compressor and a second indoor heat exchanger, an outdoor heat exchanger in which a refrigerant compressed in the first compressor or the second compressor is condensed, a bypass tube allowing the refrigerant compressed in the second compressor to bypass the first compressor, thereby flowing into a discharge side of the first compressor, and a first flow rate regulating part disposed on a discharge side of the second compressor to introduce the refrigerant discharged from the second compressor into one of the first compressor and the bypass tube.

Cascade heat pump

A cooling system and a control method thereof are provided. The cooling system may include a first compressor, a second compressor disposed downstream of the first compressor, an outdoor heat exchanger the performs heat exchange between refrigerant compressed in the first and/or second compressor and external air, an expansion device that decompresses the refrigerant condensed in the outdoor heat exchanger, a cooling evaporator evaporating the refrigerant decompressed in the expansion device, a bypass tube that guides refrigerant compressed in the first compressor to the outdoor heat exchanger, bypassing the second compressor, and a valve device controlling the flow of refrigerant discharged from the first compressor so as to selectively introduce refrigerant into the second compressor.

Cooling system and control method thereof

An air conditioner includes a first compressor and a first indoor heat exchanger, and the air conditioner forming a first refrigeration cycle. A cooler includes a second compressor and a second indoor heat exchanger, and the cooler forming a second refrigeration cycle The cooler includes a sensing part to detect a pressure and/or temperature of a refrigerant circulating in the second refrigeration cycle; and a branch part includes a plurality of branches for dividing the refrigerant to be introduced into the second heat exchange part.

Growing community of inventors

Seoul, South Korea

Jaeheuk Choi