Lg Electronics Inc.

Yong Tae Kim

Young Soo Kim

Si Moon Jeon

Yang Hwan No

Han Ki Cho

Koon Seok Lee

Hae Yong Kang

Eui Hyeok Kwon

Hyun Sang Kim

Hoon Bong Lee

Jin Seok Hu

Hyung Jun Park

Kye Lyong Kang

Jong Min Shin

Sun Cheol Bae

Eun Young Park

Seung Myun Baek

Eun Jeong Kim

Ho Sung Jang

Shin Hyun Park

Yong Chol Kwon

Su Won Lee

Young Geul Kim

Ku Young Son

Jae Seng Sim

Deok Hyun Youn

Byung Koo Kong

Kyoo Cheol Choi

Gyoo Cheol Choi

Yong Hoan Kwon

A linear compressor which can perform the natural cooling capacity modulation, even if a capacitor connected to a motor is removed. The linear compressor includes a fixed member having a compression space therein, a movable member linearly reciprocated in the fixed member to compress a refrigerant sucked into the compression space, and one or more springs provided to elastically support the movable member in the motion direction of the movable member. The compressor also includes a motor connected to the movable member to linearly reciprocate the movable member in the axial direction, and a motor control unit performing the cooling capacity modulation by the reciprocation of the movable member according to a load, by controlling an AC voltage applied to the motor so that a stroke of the movable member can be proportional to the magnitude of the AC voltage applied to the motor.

Linear compressor

A linear compressor is provided that provides a greater power by changing a frequency at high load. The linear compressor includes a mechanical device having a fixed member, a movable member linearly reciprocated in the fixed member, one or more springs provided to elastically support the movable member, and a motor connected to the movable member, and an electric controller having a rectifier, an inverter that receives a DC voltage from the rectifier, converts the DC voltage to an AC voltage, and supplies the AC voltage to the motor, a voltage sensor that senses the DC voltage, a current sensor that senses a current, and a controller that calculates a required voltage for the motor, generates a control signal, and applies the control signal to the inverter, if the required voltage is greater than the DC voltage of the voltage sensor.

Linear compressor having a controller and method for controlling a linear compressor

A home appliance system and an operation method thereof are disclosed. The home appliance outputs product information as a predetermined sound and transmits the sound through a connected communication network, thereby making it easier for a service center at a remote place to check a status of the home appliance. Further, the home appliance system and operation method thereof prevents noise or signal error generated in the procedure of converting product information into a signal of a predetermined frequency band in order to output the product information as a sound, thus enabling stable signal conversion and improving the accuracy of information transmission using the output of sound.

Home appliance, home appliance system, and diagnosis method of a home appliance

A system and method for diagnosing a home appliance are disclosed. The home appliance outputs product information as a predetermined sound signal, and transmits the sound signal to a service center of a remote site over a communication network, such that a service technician of the service center can easily check a current status of the home appliance. The diagnostic system effectively detects data using multiple synchronous signals having a time difference, quickly diagnoses a current status or fault of the home appliance, provides a service for more correctly diagnosing a faulty operation of the home appliance, and increases user satisfaction and reliability.

System and method for diagnosing home appliance

A home appliance and home appliance system are provided which enable a portable terminal not to recognize an acoustic signal sound corresponding to product information output by the home appliance as noise. Thus, the acoustic signal corresponding to product information output by the home appliance may be transmitted to a service center through the portable terminal. The home appliance may include a controller that sets a dead time at a predetermined interval of time with respect to a signal corresponding to product information to avoid a noise detection section of a portable terminal, a converter that converts the signal into an acoustic signal of a predetermined band, and a sound output device that outputs the acoustic signal as sound.

Home appliance and home appliance system

A home appliance and a home appliance system are provided. The home appliance may convert product information into an acoustic signal and externally output the same as a sound. The home appliance system may receive the sound, convert the same into the acoustic signal, and then inversely convert the acoustic signal into the product information and read the same. Accordingly, the home appliance may externally output the acoustic signal as the sound so that the user may be easily notified of transmission. Also, the home appliance system may easily transmit the sound to a management device to read the product information because the sound may be transmitted via a communications network.

A system and method for diagnosing a home appliance are disclosed. The home appliance outputs product information as a predetermined sound signal, and transmits the sound signal to a service center of a remote site over a communication network, such that a service technician of the service center can easily check a current status of the home appliance. When a diagnostic server of the service center analyzes the sound signal of the home appliance, it selects a plurality of preamble candidates and can effectively and correctly detect data using weights, so that it can quickly diagnose a faulty operation of the home appliance. An erroneous data analysis and its associated erroneous diagnosis are prevented, so that the diagnostic system provides a service for more correctly diagnosing a faulty operation of the home appliance and also increases user satisfaction and reliability of the home appliance.

The present invention relates to a remote monitoring system and a method controlling the same, which can selectively monitor according to a condition of power and a control of devices including a washer and a dryer installed in a remote place. The remote monitoring system comprises a communication module provided in each device for transmitting monitoring information after identifying an operation condition of each device according to a user's demand; and a remote monitoring unit for selecting a device to be monitored based on a result after identifying a power condition of each device, as well as displaying an operation condition of each device based on the transmitted monitoring information and the control of each device.

Remote monitoring system and method controlling the same

Refrigerator for managing food by using RFID including a plurality of storage portions divided in the refrigerator for storing food, RFID devices each having storage information of each kind of food stored in the storage portions, and controller for reading the storage information and setting up the storage portion which maintains a storage condition suitable to the storage information read thus, thereby permitting easy storage of food in a storage portion having the storage condition by using the RFID device.

Refrigerator for managing food by using RFID

The present invention relates to an apparatus and method for controlling the operating speed of a compressor of an inverter refrigerator. In an apparatus or method embodying the present invention, one knows the operating speeds which will cause the compressor to experience resonant vibrations. When it is necessary to change from a first operating frequency to a second operating frequency, and a resonant frequency band is located between the first and second frequencies, the controller will accelerate the rate of change of the operating frequency as it passes through the resonant frequency band to minimize the amount of time that the compressor is operating within the resonant frequency band.

Growing community of inventors

Changwon-si, South Korea

Yong Tae Kim