Other

Lg Electronics Inc.

Korea Research Institute of Chemical Technology

Joo Wan Kim

Tae Wan Kim

Hyung Soo Kim

Chul Ung Kim

Ki Tae Oh

Soon Yong Jeong

Jeong-Rang Kim

Eun Sang Kim

Youjin Lee

The present disclosure relates to is a sprinkler reducer fixing apparatus formed in a one-touch open bracket form and capable of easily fixing a reducer of a sprinkler. The apparatus includes at least a main frame including a first frame support portion, a sub-frame installed to be spaced at a certain interval from the main frame and including a second frame support portion, an intermediate frame installed between the main frame and the sub-frame, a shaft extending to pass through the main frame, the intermediate frame, and the sub-frame and having one end supported by the sub-frame, and a pivoting lever connected to the other end of the shaft, which protrudes from the main frame, and configured to pull and withdraw the other end of the shaft from the main frame by pivoting to decrease a distance between the main frame and the sub-frame.

Sprinkler reducer fixing apparatus

A beta zeolite catalyst for the preparation of a BTEX (benzene, toluene, ethylbenzene, xylene) mixture from polyaromatic hydrocarbons and a preparation method of the same are disclosed. The beta zeolite catalyst demonstrates high conversion of polyaromatic hydrocarbons and high BTEX production yield by containing optimum contents of the group VIB metals and cocatalysts, so that it can be effectively used as a beta zeolite catalyst for the production of BTEX.

Beta zeolite catalyst for preparation of mixture of BTEX (benzene, toluene, ethylbenzene, xylene) from poly aromatic hydrocarbons and preparation method thereof

An apparatus for controlling an operation of a linear compressor by which an instablel phenomenon caused due to a characteristics deviation of parts of a compressor is corrected to stabilize the operation of the system, thereby accomplishing an optimal operation. Also, when the tuning instability occurs due to the characteristic deviation and the assembly deviation of the mechanic unit of the compressor, and the parts deviation in the control circuit such as the sensorless stroke estimator, the compressor deviation is corrected by using a relative coordinate value. And, while the linear compressor is being operated with the stroke command value according to the cooling mode, in case that the current stroke is in an unstable state, the stroke command value is lowered down as much as a predetermined value, with which the linear compressor is operated for a predetermined time. Then, when a predetermined time lapses, it is operated with the original stroke command value, thereby evading the instablel state. In addition, the tuning instability region is searched for depending on the discharge side pressure and the suction side pressure of the compressor or the outer air temperature while the linear compressor is being operated, in order to avoid it, thereby accomplishing the optimal operation of the linear compressor.

Apparatus for controlling linear compressor and method thereof

Growing community of inventors

Seoul, South Korea

Joo Wan Kim