Abstract: Disclosed is a radar antenna including an antenna body including a first plate and a second plate; a slot radiation part and a slot reception part formed in the first plate; a transmission port and a reception port formed in the second plate; and a waveguide formed by assembling the first and second plates. The slot radiation part includes a first slot radiation part configured to radiate a radio wave in a first detection range, and a second slot radiation part configured to radiate radio waves in a second detection range having a larger width and distance than the first detection range.

Abstract: An air conditioning system includes a compressor, an outdoor heat exchanger that discharges evaporated refrigerant, and a first pipe coupling the outdoor heat exchanger and the compressor, where the first pipe allows the outdoor heat exchanger to receive at least a portion of the compressed refrigerant from the compressor.

Abstract: An air conditioner includes: a compressor configured to compress refrigerant; an indoor heat exchanger configured to condense the refrigerant compressed by the compressor; an outdoor heat exchanger configured to evaporate the refrigerant condensed by indoor heat exchanger; a heater configured to transfer heat to the refrigerant condensed by the indoor heat exchanger; a first pipe configured to flow fluid towards the heater; a second pipe configured to flow fluid away from the heater; and a bypass pipe configured to flow fluid between the first pipe and the second pipe.

Abstract: An air conditioning system including an outdoor heat-exchanging unit, at least one indoor heat-exchanging unit, a gaseous refrigerant line connected between the outdoor heat-exchanging unit and the indoor heat-exchanging unit, to allow a refrigerant in a gaseous state to flow between the outdoor heat-exchanging unit and the indoor heat-exchanging unit, and a pressure compensation device for increasing a pressure of the gaseous refrigerant flowing through the gaseous refrigerant line. The pressure compensation device is located along the gaseous refrigerant line at a position closer to the indoor heat-exchanging unit than to the outdoor heat-exchanging unit. A pressure compensation device for use in an air conditioning system is also provided.

Abstract: An air conditioner includes: a compressor configured to compress refrigerant; an indoor heat exchanger configured to condense the refrigerant compressed by the compressor; an outdoor heat exchanger configured to evaporate the refrigerant condensed by indoor heat exchanger; a heater configured to transfer heat to the refrigerant condensed by the indoor heat exchanger; a first pipe configured to flow fluid towards the heater; a second pipe configured to flow fluid away from the heater; and a bypass pipe configured to flow fluid between the first pipe and the second pipe.

Abstract: An air conditioning system includes a compressor; an outdoor heat exchanger that discharges evaporated refrigerant; and a first pipe coupling the outdoor heat exchanger and the compressor, where the first pipe allows the outdoor heat exchanger to receive at least a portion of the compressed refrigerant from the compressor.

Abstract: Provided are a heat pump system and a method of controlling the same. In a heating operation, a refrigerant circulating in an air-conditioning device is heat-exchanged with a working fluid heated by a heating device so as to be heated, and the heating device is controlled according to a temperature of the working fluid. Thus, various types of heating members are conveniently used as the heating device for heating the refrigerant.

Abstract: An air conditioning system including an outdoor heat-exchanging unit, at least one indoor heat-exchanging unit, a gaseous refrigerant line connected between the outdoor heat-exchanging unit and the indoor heat-exchanging unit, to allow a refrigerant in a gaseous state to flow between the outdoor heat-exchanging unit and the indoor heat-exchanging unit, and a pressure compensation device for increasing a pressure of the gaseous refrigerant flowing through the gaseous refrigerant line. The pressure compensation device is located along the gaseous refrigerant line at a position closer to the indoor heat-exchanging unit than to the outdoor heat-exchanging unit. A pressure compensation device for use in an air conditioning system is also provided.

Abstract: A cogeneration system is disclosed. The cogeneration system includes a heat pump type air conditioner, a waste heat recoverer to recover waste heat of a drive source, a waste heat supplying heat exchanger, which is heated by the waste heat recovered by the waste heat recoverer, and a bypassing unit, which causes the waste heat supplying heat exchanger to function as an evaporator during a heating operation of the heat pump type air conditioner. In accordance with this arrangement, it is possible to enhance the heating capacity of the heat pump type air conditioner irrespective of outdoor temperature, to prevent damage of compressors, and to minimize power consumption.

Abstract: A cogeneration system including a generator, a drive source operating to drive the generator, and thus, to cause the generator to generate electricity, a heat pump type air conditioner including a compressor, a 4-way valve, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger, a heater to heat air, which has passed around the indoor heat exchanger after completing heat exchange with the indoor heat exchanger, and a waste heat recoverer to recover waste heat of the drive source during a heating operation of the heat pump type air conditioner, and to supply the recovered waste heat to the heater. The waste heat of the drive source can be re-used to heat air passing through the indoor heat exchanger, so that the heating performance of the heat pump type air conditioner is enhanced.

Abstract: A cogeneration system including an engine, which drives a generator to generate electricity, a cooling/heating unit, which includes at least one compressor, a four-way valve, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger, to establish a heat pump type refrigerant cycle, and a refrigerant over-heating unit to supply heat of cooling water used to cool the engine to a suction-side refrigerant line of the compressor of the cooling/heating unit, and to supply heat of exhaust gas discharged from the engine to the suction-side refrigerant line of the compressor and to a discharge-side refrigerant line of the compressor. In accordance with the cogeneration system, it is possible to maximize absorption of the waste heat of the engine while preventing compressor malfunction, and thus, to increase the refrigerant condensing temperature of the indoor heat exchanger. Thus, an enhancement in heating performance is achieved.

Abstract: A cogeneration system including an engine, which drives a generator to generate electricity, a cooling/heating unit, which comprises at least one compressor, a four-way valve, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger, to establish a heat pump type refrigerant cycle, and an exhaust heat consuming heating unit to supply heat of exhaust gas discharged from the engine to a heat exchanging zone of the indoor heat exchanger of the cooling/heating unit, and thus, to heat a confined space. Since waste heat generated from the engine is directly used in the cooling/heating unit, an enhancement in indoor heating efficiency is achieved.

Abstract: A method for controlling operations of an air-conditioner includes: a step in which when an operation load of an air-conditioner increases, if an outputted compressing capacity of the air-conditioner is smaller than a compressing capacity corresponding to the operation load and an operation frequency of the first compressor is a maximum frequency of the first compressor, a second compressor is operated; and a step in which when the operation load is reduced, if the outputted compressing capacity of the air-conditioner is greater than the compressing capacity corresponding to the operation load and the operation frequency of the first compressor is a minimum frequency of the first compressor, the second compressor is stopped.

Abstract: A cogeneration system including a generator, a drive source operating to drive the generator, and thus, to cause the generator to generate electricity, a heat pump type air conditioner including a compressor, a 4-way valve, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger, a heater to heat air, which has passed around the indoor heat exchanger after completing heat exchange with the indoor heat exchanger, and a waste heat recoverer to recover waste heat of the drive source during a heating operation of the heat pump type air conditioner, and to supply the recovered waste heat to the heater. The waste heat of the drive source can be re-used to heat air passing through the indoor heat exchanger, so that the heating performance of the heat pump type air conditioner is enhanced.

Abstract: An indoor unit of an air conditioner, includes a blower fan disposed within a casing; and a heat exchanger for heat-exchanging between refrigerant and air flowing by the blower fan, said heat exchanger connected to a refrigerant inlet pipe for introducing refrigerant and a refrigerant outlet pipe for discharging a refrigerant, wherein the refrigerant inlet pipe is connected to a side of the heat exchanger, where a flow velocity of the air passing through the heat exchanger is relatively high. Accordingly, efficiency of heat exchange between the indoor air and refrigerant can be improved, and thus cooling and heating efficiency of the indoor air is improved, thereby improving performance of the air conditioner. Also, by reducing the operation time of the air conditioner, power consumption can be reduced.

Abstract: Provided is a defrosting method for an air conditioner capable of improving an efficiency of a heating mode by supplying the heating mode to a user as long as possible in a condition that a frost deposit is hardly generated. For this purpose, the defrosting method for the air conditioner comprises the steps of; establishing a defrosting initiation temperature of the air conditioner; and performing the defrosting operation based on the established defrosting initiation temperature.

Abstract: A method for controlling operations of an air-conditioner includes: a step in which when an operation load of an air-conditioner increases, if an outputted compressing capacity of the air-conditioner is smaller than a compressing capacity corresponding to the operation load and an operation frequency of the first compressor is a maximum frequency of the first compressor, a second compressor is operated; and a step in which when the operation load is reduced, if the outputted compressing capacity of the air-conditioner is greater than the compressing capacity corresponding to the operation load and the operation frequency of the first compressor is a minimum frequency of the first compressor, the second compressor is stopped.

Abstract: Disclosed is a method for controlling an air conditioner having a multi-compressor. The method comprises the steps of: first determining, in order to accomplish a set temperature after a user starts the air conditioner, a cooling load of a room by measuring an on-time for which at least two compressors are run, in a manner such that the more the one-time of the compressors is long, the more the cooling load of the room is judged to be large; and operating the air conditioner by changing a compressing capacity of the compressors in response to a first determined cooing load, in a manner such that, when the cooling load is large, the air conditioner is operated by a first combination of compressors, having a large compressing capacity, and, when the cooling load is small, the air conditioner is operated by a second combination of compressors, having a small compressing capacity.

Abstract: Disclosed is a method for controlling an air conditioner having a multi-compressor. The method comprises the steps of: first determining, in order to accomplish a set temperature after a user starts the air conditioner, a cooling load of a room by measuring an on-time for which at least two compressors are run, in a manner such that the more the on-time of the compressors is long, the more the cooling load of the room is judged to be large; and operating the air conditioner by changing a compressing capacity of the compressors in response to a first determined cooing load, in a manner such that, when the cooling load is large, the air conditioner is operated by a first combination of compressors, having a large compressing capacity, and, when the cooling load is small, the air conditioner is operated by a second combination of compressors, having a small compressing capacity.

Abstract: Heat pump and a method for controlling a cooling/heating capability thereof, in which a capacity varying device is improved for adjusting a cooling/heating capability, the heat pump including a compressor having an inlet for drawing, and compressing low temperature and low pressure refrigerant, and an outlet for discharging the compressed refrigerant, a four way valve for connecting the outlet and the inlet to an indoor heat exchanger and an outdoor heat exchanger selectively depending on cooling/heating, the indoor heat exchanger for evaporating/condensing the refrigerant by heat exchange with room air in cooling/heating respectively, the outdoor heat exchanger for evaporating/condensing the refrigerant by heat exchange with external air, a capillary tube having a reduced diameter for expansion of the refrigerant, a change over valve having a plunger movable by a pressure difference provided therein, and a connection tube connected the indoor heat exchanger and a four way valve, and a bypass tube connected b