Lg Electronics Inc.

Dong-Woo Park

Min-Kyu Jung

Jong-Il Park

Dong-Hoon Yi

Ki-Seok Sung

Jeong-Suk Yoon

Sung-Woon Kim

Hyoung-Hwa Yoon

Hun-Sik Lee

Chul-Hun Nam

A method for controlling a robot cleaner includes: detecting a cleaning target space, setting a cleaning region within the detected cleaning space and cleaning the set cleaning region; if the set cleaning region is completely cleaned, moving to a not-yet-cleaned region adjacent to a cleaning completion spot of the cleaning region; and setting a new cleaning region in the not-yet-cleaned region and performing cleaning. Without repeating a cleaning region in the cleaning target space, the robot cleaner can extend its cleaning region, so the cleaning efficiency of the robot cleaner can be improved. Also, the robot cleaner can be smoothly enter a new cleaning target space or released therefrom. In particular, even when the entrance of the new cleaning target space is narrow, the robot cleaner can smoothly enter the new cleaning target space and gets out thereof.

Detecting apparatus of robot cleaner and controlling method of robot cleaner

A muffler for a compressor has a chamber between an inlet and an outlet and a communicating pipe for indirectly connecting the inlet to the outlet, whereby a suction loss of a refrigerant sucked into the muffler for the compressor can be reduced and also pressure pulsation can be reduced so as to enhance a cooling capability of the compressor and achieve a noise reduction effect. Also, an assembling structure of the muffler can be simplified, resulting in reduction of fabricating cost and improvement of productivity.

Muffler for compressor

The present invention relates to a discharging noise system of a hermetic compressor. The present invention includes a first discharging noise suppressor () provided at one side end of a cylinder blockto firstly reduce noise and pulsation of work fluid compressed in and discharged from a compressing chamber () formed to be bored through the cylinder block () in a fore and aft direction, a second discharging noise suppressor (') provided at the other side end of the cylinder block () and communicating with the first discharging noise suppressorto secondarily reduce noise and pulsation of the work fluid with noise and pulsation reduced by the first discharging noise suppressor (), a connection pipe () for allowing the first and second discharging noise suppressors () and (&#x2032;) to communicate with each other to form a channel for allowing the work fluid to move, the connection pipe () having a length longer than a shortest straight distance between the discharging noise suppressors (and&#x2032;), and a discharging pipe () provided at the second discharging noise suppressor (&#x2032;) to form a channel through which the work fluid is discharged to the outside. According to the present invention configured as above, the connection pipe is relatively long to reduce pulsation, thereby improving operating characteristics of the hermetic compressor, so that vibration generated by the pulsation is reduced to improve durability of the hermetic compressor.

Discharging noise system of a hermetic compressor

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Seoul, South Korea

Dong-Woo Park