Samsung Electronics Co., Ltd.

Hanatech Co., Ltd.

Aim Tech Co., Ltd.

Hyo Sang Lee

Jung Hee Lee

Ji Hoon Choi

Jeong Su Han

Suk Ho Lee

Il Yong Cho

Dong Ho Park

Yong Hee Jang

Byoung Guk Lim

Kwon Chul Yun

Ji Hoon Ha

Hyung Mo Koo

Kab Jin Jun

Nam Ju Park

Byung Ik Choi

Man Soon Im

Jae Ho Baek

Chang Hwan Bae

Byung Gu Kim

Kee Hwan Ka

A sealed sleeve installed at an insertion coupling portion in a state in which a first pipe and a second pipe are insertion coupled to each other in order to seal couple the first pipe having a first outer diameter and a first inner diameter and the second pipe having a second outer diameter and a second inner diameter larger than the first outer diameter includes: a pillar shaped-main body having a main body central shaft; a through-hole formed using the main body central shaft as a central shaft on the main body and having an inlet as a second pipe side opening in an installation state and an outlet as a first pipe side opening in an installation state, wherein in the through-hole, a pressing portion that applies a sealing pressure to the insertion coupling portion is formed in a portion of an inner wall, and an inner diameter of the pressing portion is smaller than the second outer diameter.

Sealed sleeve

An apparatus for detecting an oil level and a method for controlling the same, an apparatus for detecting oil flow and a method for controlling the same, and a method for controlling oil return using the detected oil level and the detected oil flow are disclosed. The level of oil stored in a compressor is measured at two or more positions. The frequency comparison scheme using two electrodes can correctly detect the level of oil stored in the compressor, a refrigerant state, and the level of mixed oils, and can determine an internal state of the compressor and a normal or abnormal state of the oil return system, such that the oil return control can be actively controlled. The flow of oil in the oil return pipe is detected so as to determine whether the oil is normally supplied in real time, such that a malfunction of the compressor is prevented and a valve state can be checked. The level of oil stored in the compressor is adjusted not only using the oil level detection result but also the oil flow detection result, and the oil return operation can be controlled.

Oil level detecting apparatus and control method thereof, oil flow detecting apparatus and control method thereof, method for control oil return using oil level and oil flow

An oil detection device for a compressor to detect at least two levels of oil in the compressor includes a first detection unit including a first reference electrode and a first detection electrode disposed at both sides of the first reference electrode, and a second detection unit including a second reference electrode spaced from the first reference electrode and a second detection electrode disposed at both sides of the second reference electrode.

Oil detection device, compressor having the same and method of controlling the compressor

A storage container with a sensor device to detect a state of food contained in the storage container and a refrigerator having the same. The sensor device is separably mounted to the storage container. The sensor device includes an electrode terminal usable not only to achieve a charging operation, but also to achieve a salinity measuring operation. Thus, the sensor device has user convenience while having a compact size.

Storage container with sensor device and refrigerator having the same

A salinity measuring apparatus to determine salinity of food includes a salinity sensing unit including a pair of measuring electrodes and a capacitor, a switching unit to switch a voltage of the capacitor of the salinity sensing unit, and a control unit to provide a pulse signal with a constant frequency to the switching unit and to determine the salinity of the food which is in contact with the measuring electrodes of the salinity sensing unit based on when the voltage of the capacitor reaches a reference voltage. By providing the pulse signal with the constant frequency to the switching unit, it is possible to minimize the internal impedance variation of the capacitor and to more accurately measure the salinity of the food. Since a period when the voltage of the capacitor is substantially '' is present, it is possible to minimize accumulation of ions in the measuring electrodes.

Salinity measuring apparatus

Growing community of inventors

Osan-si, South Korea

Hyo Sang Lee