Goldstar, Co., Ltd.

Lg Electronics Inc.

Jin Seong Hwang

Jang W Lee

Dong Hyuk Lee

Yang Ho Kim

Young Hwan Ko

Hwan Jong Choi

Ja Hyung Koo

Mun Seok Seo

Ki T Oh

Si Kyong Sung

Byung Il Park

Geun Bae Hwang

Young Ho Hong

Kyeong Wook Heo

Chun Su Kang

In Gyu Kim

Tae Geun Kim

Jun Hyeon Hwang

Ho Jin Song

Dae Geun Seo

Geun Bae Lg Electronics Hwang

Kyeong Wook Lg Electronics Inc Heo

Young Hwan Lg Electronics Inc Ko

Si Kyong Lg Electronics Inc Sung

An electric appliance and a control method thereof are disclosed. The electric appliance includes a communication device connected with a smart grid net to recognize electric power information including power-rate information for each time period, a sensing device configured to sense a predetermined operation mode and an operation state according to the operation mode, and a control device configured to implement power-saving operation based on the received electric power information and the state information sensed by the sensing device.

Electric appliance and a control method thereof

A fan apparatus and an air conditioner employing such a fan apparatus are provided to reduce noise and enhance efficiency. The fan apparatus may be driven by a BLDC motor that stably drives the fan and increases an air flow rate. Heat exchange efficiency of an outdoor unit of a front suction/discharge type air conditioner may be improved by such a fan apparatus driven by such a BLDC motor.

Fan for air conditioner

An apparatus for and a method of preventing bumping and falling of an automatic travelling cleaner wherein a situation of the cleaner is determined by sensing a variation of flow rate of a fluid in an extension pipe depending on a gap between an intake port and a surface to be cleaned, thereby deriving a suction work ratio or sensing revolutions and a current value of a cleaning motor or a torque value of each travel motor, and then determining a travel, a bumping, and a step sensing, based on the sensed value. The present invention eliminates the provision of a plurality of sensors densely arranged around a cleaner and adapted to sense bumping and falling of the cleaner and thus eliminates the requirement of additional devices for the sensors. This reduces the manufacture costs.

Apparatus for preventing bumping and falling of automatic travelling

A method for automatically controlling a travelling and cleaning operation of a vacuum cleaner. The method comprises a learning travel step for calculating and storing straight travelling distances of outline paths and path directions together with the total number of the outline paths, a two-dimensional coordinates calculating step for determining positions of straight division lines by using data of the travelling distances and the path directions, and calculating two-dimensional coordinates of cleaning blocks determining positions and areas of the cleaning blocks, a cleaning block discriminating step for discriminating integrated cleaning regions each comprising a plurality of sequential cleaning blocks of which each lower end or upper end coincides with an outline path of the cleaning region, and determining a cleaning start block and a cleaning end block of the integrated cleaning region, and a practical cleaning step for controlling the cleaner to travel along a travelling path from a cleaning start block to a cleaning end block of the integrated cleaning region, and turn in 180.degree. turning reverse, then travel from the cleaning end block to the cleaning start block simultaneously with overlapping the cleaning blocks in a predetermined overlapping value.

Method for automatically controlling a travelling and cleaning operation

Apparatus and method for determining the condition of the floor to be cleaned by a cleaning robot. The apparatus comprises an ultrasonic wave signal transmitting circuit for transmitting an ultrasonic wave signal to an ultrasonic wave signal transmitter under the control of a microcomputer, a receiving amplifying unit for amplifying the ultrasonic wave signal transmitted from the ultrasonic wave signal transmitter and received in a ultrasonic wave signal receiver, a receiving demodulating unit for smoothing the output signal from the receiving amplifying unit to demodulate it and then apply it to the microcomputer. According to the control of the microcomputer, the ultrasonic wave signal is transmitted for a predetermined period. The period from the time when the ultrasonic wave signal is transmitted to the time when the ultrasonic wave signal is received in the ultrasonic wave signal receiver is measured. Then, the distance between the position of the ultrasonic wave signal receiver and the floor to be cleaned is calculated from the measured period. Accordingly, it can be determined whether the floor to be cleaned is a normal floor, a floor covered with a carpet, or stairs, thereby enabling correct recognition of the condition of the floor to be cleaned, without being adversely affected from environment.

Apparatus and method for recognizing carpets and stairs by cleaning robot

Growing community of inventors

Seoul, South Korea

Jin Seong Hwang