Abstract: The present invention relates to a dust sensor comprising; a case having an air inlet and an air outlet, an air flow path which is formed inside the case, of which one end is connected to the air inlet, and of which the other end is connected to the air outlet, and which comprises first and second flow paths that have different air flow directions, a wind-blowing fan arranged on the air flow path, a first sensing module which is arranged on the air flow path and which senses dust particles in the air, and a second sensing module, which is arranged on the air flow path, arranged further downstream than the first sensing module, and senses dust particles that are smaller than the dust particles sensed by the first sensing module, and thus, the present invention can accurately measure both large dust particles and small dust particles present in the air.

Abstract: An air cleaning system can rapidly senses occurrence of local pollution, caused by fine dust, through a remote sensor hub and supplies purified air to a polluted area in a concentrated manner, thereby quickly purifying indoor air.

Abstract: A heat pump including a boiler is disclosed. The heat pump may include a quick-hot-water-supply tank and the boiler, which may be operated selectively based on a temperature of external air or an electric power rate per unit heat quantity.

Abstract: A motor control apparatus and method are provided. The motor control apparatus may include a power supply device supplying power to a motor, a power control device selectively blocking current supplied to the motor depending on whether or not the current supplied from the power supply device to the motor is greater than a reference current value, a controller that controls an intensity of the current supplied from the power supply device to the motor, and a load torque detector that detects a load torque generated by the motor as the motor rotates. The controller controls a maximum value of the current to be supplied to the motor so that the maximum value is less than the reference current value when the maximum value of the load torque detected by the load torque detector is greater than a maximum motor output due corresponding to the reference current value.

Abstract: A device and method for reducing vibration in a compressor are provided. The device for reducing vibration in a compressor may include a compressor controlled to be operated at a target operating velocity after starting; a power supply that supplies power to the compressor; and a controller that controls the power supply so that a magnitude or a phase of the power supplied to the compressor is changed. The controller may control the power supply so that vibration generated in the compressor is offset by an exciting force generated in the compressor within a predetermined time interval multiple times when the compressor starts or when the compressor stops during a target operation velocity operating of the compressor.

Abstract: A motor control apparatus and method are provided. The motor control apparatus may include a power supply device supplying power to a motor, a power control device selectively blocking current supplied to the motor depending on whether or not the current supplied from the power supply device to the motor is greater than a reference current value, a controller that controls an intensity of the current supplied from the power supply device to the motor, and a load torque detector that detects a load torque generated by the motor as the motor rotates. The controller controls a maximum value of the current to be supplied to the motor so that the maximum value is less than the reference current value when the maximum value of the load torque detected by the load torque detector is greater than a maximum motor output due corresponding to the reference current value.

Abstract: A heat pump including a boiler is disclosed. The heat pump may include the boiler which may be selectively operated based on a temperature of external air or an electric power rate per unit heat quantity.

Abstract: A heat pump including a boiler is disclosed. The heat pump may include a quick-hot-water-supply tank and the boiler, which may be operated selectively based on a temperature of external air or an electric power rate per unit heat quantity.

Abstract: A heat pump type speed heating apparatus is provided that may include a cooling cycle circuit (including a compressor, an outdoor heat exchanger, an expansion apparatus, and an indoor heat exchanger), a hot water supply heat exchanger connected to the cooling cycle circuit through a hot water supply flow path for a refrigerant from the compressor to condense, expand, and evaporate in the cooling cycle circuit after being used for a hot water supply, a refrigerant controller to control a flow direction of the refrigerant from the compressor such that the refrigerant discharged from the compressor passes through the hot water supply heat exchanger or bypasses the hot water supply heat exchanger, and a heat exchanger bypass flow path to guide the refrigerant that has passed the hot water heat exchanger between the outdoor heat exchanger and the indoor heat exchanger to bypass either of the outdoor heat exchanger or the indoor heat exchanger.

Abstract: A home appliance and a method of operating the same are provided. By controlling operation of the home appliance with varied rate information according to a power consumption amount, an entire power consumption amount is reduced, and by preventing power consumption from being concentrated in a specific time zone, power consumption is distributed.