Abstract: The present invention relates to a novel heterocyclic compound usable in an organic light-emitting device and to an organic light-emitting device comprising same, wherein [chemical formula A] is as described in the detailed description of the invention.

Abstract: Disclosed are an operation control device of a compressor, which can reduce motor loss by applying an AC power to a motor of the compressor without a switching operation of a control unit, and a method thereof. The operation control device of the compressor comprises: a capacitor electrically connected to a motor of the compressor and having a predetermined capacitance; a control unit connected in series to the motor of the compressor and applying an AC power to the motor of the compressor according to a control signal; and a controller detecting a load variation amount on the basis of a current and voltage applied to the motor of the compressor and controlling on/off of the control unit according to the detected load variation amount.

Abstract: A reciprocating motor and a reciprocating compressor having the same are provided. One side of each of outer and inner cores forming a stator are connected to each other, to prevent a magnetic flux generated by the coil and a magnet from leaking out of the stator. Hence, it is possible to fabricate components of the reciprocating compressor employing such a reciprocating motor by using a relatively low-cost magnetic substance, resulting in a decrease in fabricating costs of the compressor. Also, a length of the magnet may be reduced, which results in a reduction of the cost for the magnet, thereby decreasing fabricating costs of the reciprocating motor and the reciprocating compressor employing the reciprocating motor.

Abstract: A piston displacement device for a reciprocating compressor comprises a piston linearly reciprocated in a cylinder and having a stroke length varied by a reciprocating motor, a plurality of resonance springs for guiding a resonant motion of the piston, and a piston transfer unit for moving the piston forward or backward in a motion direction of the piston according to a capacitance variation of a compressor and thereby maintaining the same top dead center. The piston is moved according to a capacitance variation of the compressor thereby to minimize a dead volume thereof and to increase the efficiency of the compressor.

Abstract: A refrigerant suction guide structure of a reciprocating compressor is provided. The refrigerant suction guide structure includes a cylinder having an accommodating space inside, a piston having suction channels through which refrigerant is inhaled inside and inserted into the cylinder to be in a linear reciprocating motion, a suction valve included in the end of the piston to open and close the suction channels, and a valve fixing member for combining the suction valve with the piston. The suction channels of the piston include inclined surfaces for guiding refrigerant to the outside in which the suction valve is first opened. The suction channels are formed so as to be inclined to reduce flow resistance of inhaled refrigerant such that the amount of the inhaled refrigerant is increased. Therefore, it is possible to improve the efficiency of a compressor.

Abstract: Disclosed herein is a linear compressor in which a piston reciprocally moves in a cylinder upon receiving a reciprocating drive force of a linear motor to compress working-fluid, for example, refrigerant, received in the cylinder. The linear compressor comprises the piston adapted to reciprocally move in the cylinder, the piston being internally formed with a suction path, a suction valve to open or close the suction path of the piston to selectively connect the suction path of the piston to the interior of the cylinder, and a suction valve stopper to limit the degree of opening of the suction valve, whereby no excessive stress is applied to the suction valve. This has the effect of eliminating damage and deformation of the suction valve, minimizing vibration and noise due to the opening/closing operations of the suction valve, and maintaining the compression efficiency of the compressor at a constant value.

Abstract: There are provided a linear motor and the linear compressor using the linear motor. The linear motor includes a bobbin, a coil wound in the bobbin, an outer core provided on the bobbin, an inner core provided to perform a linear reciprocating motion with a moving body, and a magnet provided on the inner core so that the inner core and the moving body perform a linear reciprocating motion. The magnet is configured to provide a gap between the magnet and an outer core and to be in close contact to the inner core.

Abstract: Disclosed are a reciprocating compressor and a refrigerator having the same. The reciprocating compressor comprises a casing, one reciprocating motor mounted at a frame unit provided in the casing for generating a linear-reciprocation driving force, a first compression unit for compressing a refrigerant directly sucked without passing through the inside of the casing by receiving the driving force of the reciprocating motor, and a second compression unit for mixing a refrigerant introduced into the casing and a refrigerant discharged from the first compression unit and then compressing the mixed refrigerant once more by receiving the driving force of the reciprocating motor. Accordingly, a refrigerant is consecutively compressed two times, components are simplified, and the compressor is easily controlled. Also, the refrigerator having the reciprocating compressor decreases a load of the reciprocating compressor thereby to enhance the efficiency of the refrigerator.

Abstract: A reciprocating motor and a reciprocating compressor having the same are provided. One side of each of outer and inner cores forming a stator are connected to each other, to prevent a magnetic flux generated by the coil and a magnet from leaking out of the stator. Hence, it is possible to fabricate components of the reciprocating compressor employing such a reciprocating motor by using a relatively low-cost magnetic substance, resulting in a decrease in fabricating costs of the compressor. Also, a length of the magnet may be reduced, which results in a reduction of the cost for the magnet, thereby decreasing fabricating costs of the reciprocating motor and the reciprocating compressor employing the reciprocating motor.

Abstract: A driving apparatus of a motor capable of operating a motor of a reciprocating compressor stably by using a simple power voltage control unit. The apparatus includes a power voltage control unit for maintaining a power voltage supplied from a power supply unit as a certain value when a motor is operated, outputting the certain power voltage or cutting off the power voltage after a certain time has passed; and a capacitor for applying the power voltage supplied from the power supply unit to the motor when the power voltage control unit cuts off the power voltage.

Abstract: Disclosed are an apparatus for controlling a driving of a reciprocating compressor capable of enhancing an efficiency by differently controlling a frequency and a stroke voltage according to a load size and capable of reducing consumption power, and a method thereof. The apparatus comprises a controlling unit for judging a load size by comparing a phase difference between a detected current and a stroke with a reference phase difference, and outputting a frequency control signal and a stroke control signal according to the judged load size.

Abstract: An apparatus for controlling an operation of a reciprocating compressor includes a inductance increasing device connected to a motor of the reciprocating compressor, so that a surge current generated when power is applied to the reciprocating compressor at an initial stage is reduced and thus an initial stroke of the reciprocating compressor is reduced. Accordingly, operational efficiency of the reciprocating compressor is improved.

Abstract: Disclosed are an apparatus for controlling a driving of a reciprocating compressor capable of enhancing an efficiency by differently controlling a frequency and a stroke voltage according to a load size and capable of reducing consumption power, and a method thereof. The apparatus comprises a controlling unit for judging a load size by comparing a phase difference between a detected current and a stroke with a reference phase difference, and outputting a frequency control signal and a stroke control signal according to the judged load size.

Abstract: Disclosed are an operation control device of a compressor, which can reduce motor loss by applying an AC power to a motor of the compressor without a switching operation of a control unit, and a method thereof. The operation control device of the compressor comprises: a capacitor electrically connected to a motor of the compressor and having a predetermined capacitance; a control unit connected in series to the motor of the compressor and applying an AC power to the motor of the compressor according to a control signal; and a controller detecting a load variation amount on the basis of a current and voltage applied to the motor of the compressor and controlling on/off of the control unit according to the detected load variation amount.

Abstract: Provided is an apparatus for controlling an operation of a compressor which can always apply a constant voltage to the compressor without noise and a method therefor. The apparatus for controlling the operation of the compressor includes: a triac electrically connected to the compressor; and a controller for controlling a turn-on duration of the triac on the basis of a voltage value of an alternating current power applied to the compressor and a predetermined reference voltage value.

Abstract: A frame of a reciprocating compressor includes a main frame having a cylindrical insertion hole to receive a cylinder of a compression unit along a center axis thereof and a flange that supports an outer stator of a reciprocating motor at the outer circumference of the flange. A sub frame is engaged to the main frame by an engaging device and positioned to cover an outer circumferential surface of the cylinder to form an oil flow path in a space between the main frame and the cylinder.

Abstract: A linear motor and a linear compressor using the linear motor are provided. Since an inner core is linearly and reciprocally moved together with a target movement body and a magnet insertion recess is formed on an outer circumferential surface thereof, the forward/backward vibration movement of a magnet can be effectively controlled. In addition, since a gap is minimized, self-resistance that interferes with a force exerted by the magnet can be minimized, and accordingly, the size of the magnet necessary for outputting the same force can be minimized.

Abstract: There are provided a linear motor and the linear compressor using the linear motor. The linear motor includes a bobbin, a coil wound in the bobbin, an outer core provided on the bobbin, an inner core provided to perform a linear reciprocating motion with a moving body, and a magnet provided on the inner core so that the inner core and the moving body perform a linear reciprocating motion. The magnet is configured to provide a gap between the magnet and an outer core and to be in close contact to the inner core.

Abstract: Disclosed herein is a linear compressor in which a piston reciprocally moves in a cylinder upon receiving a reciprocating drive force of a linear motor to compress working-fluid, for example, refrigerant, received in the cylinder. The linear compressor comprises the piston adapted to reciprocally move in the cylinder, the piston being internally formed with a suction path, a suction valve to open or close the suction path of the piston to selectively connect the suction path of the piston to the interior of the cylinder, and a suction valve stopper to limit the degree of opening of the suction valve, whereby no excessive stress is applied to the suction valve. This has the effect of eliminating damage and deformation of the suction valve, minimizing vibration and noise due to the opening/closing operations of the suction valve, and maintaining the compression efficiency of the compressor at a constant value.

Abstract: Disclosed are a stator for a reciprocating motor and a manufacturing method thereof which are able to simplify assembling processes, to reduce assembling time, and thereby to improve productivity by laminating an inner stator to be a straight line shape and bending to be a cylindrical shape. The stator is fabricated by laminating lamination sheets as a straight line and bending it to be a cylindrical shape, and a mounting band is fixed on inner circumferential surface of the lamination sheets so as to maintain the lamination sheets connected when the lamination sheets are bent to be the cylindrical shape.