摘要:
A heat exchanger for a refrigerator is disclosed, which has a simple structure, an improved heat exchanging efficiency, and an operating reliability. In the heat exchanger including a refrigerant tube (10) having a plurality of straight parts (11) and a plurality of curved parts (12) which connect the straight parts; and a plurality of fins (20) coupled to the straight parts (11) respectively through a plurality of inner through holes (21), the refrigrant tube (10) has a joining portion of the curved parts (12) and the straight parts (11) coated with a metal layer (110).
摘要:
Disclosed is a lyocell multi-filament for a tire cord and a method of producing the same. The method includes i) dissolving mixed powder of cellulose and polyvinyl alcohol in a mixed solvent of N-methyl morpholine N-oxide and water to prepare a dope, ii) extruding the dope using a spinning nozzle including orifices through air gaps into a conical upper coagulation bath to solidify the dope to produce a multi-filament, iii) feeding the multi-filament through a lower coagulation bath to a washing bath, and washing the multi-filament, and iv) drying and oiling the washed multi-filament and winding the resulting multi-filament. At this time, the orifices each have a diameter (D) of 100 to 300 μm, a length (L) of 200 to 2400 μm, and a ratio of the length to the diameter (L/D) of 2 to 8, and are spaced apart from each other at intervals of 2.0 to 5.0 mm. The method provides a lyocell multi-filament having excellent physical properties useful as a tire cord, thereby producing a tire for an automobile having improved driving stability, dimensional stability, and uniformity using the tire cord.
摘要:
Provided is a scroll compressor, which allows coolant in a compressor chamber to be partially discharged so that frictions generated in frictional surfaces between an orbiting scroll and an Oldham ring and between the Oldham ring and a main frame may be decreased.
摘要:
A vacuum cooking apparatus and cooking method using the vacuum cooking apparatus, which automatically performs cold storage, thawing, cooking, and warming functions in a single cooking apparatus, thus improving cooking convenience. In the cooking method, a temperature of a cooking cavity is decreased by creating a vacuum state in the cooking cavity for a preset period in response to a cold storage signal, thus performing a cold storage mode that allows food to be stored at a low temperature. The cold storage mode is terminated after the preset period has elapsed, and then a cooking mode is performed by heating the food.
摘要:
A steam oven which selectively heats food at desired locations includes a cabinet to define a cooking cavity therein, a steam generator to generate steam, a plurality of steam feed pipes to guide and supply the steam generated by the steam generator into the cooking cavity, including outlet ends placed at a plurality of predetermined positions in the cooking cavity so as to evenly distribute the steam into the cooking cavity, and a plurality of steam valves mounted at predetermined portions of the plurality of steam feed pipes. The plurality of steam valves independently control the plurality of steam feed pipes so as to change positions from which the steam is discharged into the cooking cavity. Therefore, the steam oven of the present invention cooks the food in desired directions by allowing the plurality of the steam valves to independently control the plurality of steam feed pipes.
摘要:
Disclosed is a variable capacity scroll compressor including an intake passage connected to an intake chamber, an exhaust passage connected to an exhaust chamber, a bypass port formed through a wall defining a compression space, a bypass passage having a first end connected to the bypass port and a second end connected to the intake chamber that is in a low-pressure state, a check valve for selectively connecting the bypass passage to the bypass port, and a control valve for selectively applying one of low-pressure fluid and high-pressure fluid in the exhaust passage to the check valve to control the check valve to one of opening and closing positions.
摘要:
A variable capacity rotary compressor is designed to prevent eccentric bushes from slipping during a compression operation, thus preventing noise from being generated and increasing durability. The compressor includes a housing to define two compression chambers having different capacities therein. A rotating shaft is rotated in the compression chambers. Two eccentric cams are mounted to the rotating shaft. Two eccentric bushes are rotatably fitted over the eccentric cams. Two rollers are rotatably fitted over the eccentric bushes. Two vanes are installed in the compression chambers to be reciprocated in a radial direction of the rotating shaft. A cylindrical connecting part integrally connects the eccentric bushes to each other, with a locking slot being provided around the connecting part. A locking pin is mounted to the rotating shaft to project from the rotating shaft, and is locked by either of opposite ends of the locking slot, according to a rotating direction of the rotating shaft, thus making one of the eccentric bushes eccentric from the rotating shaft while making a remaining one of the eccentric bushes be released from eccentricity from the rotating shaft. A restraining unit outwardly moves from the rotating shaft by a centrifugal force when the rotating shaft is rotated, to restrain the connecting part.
摘要:
A semiconductor device includes a compound semiconductor layer, where the compound semiconductor layer includes separate fin patterns in separate regions. The separate fin patterns may include different materials. The separate fin patterns may include different dimensions, including one or more of width and height of one or more portions of the fin patterns. The separate fin patterns may include an upper pattern and a lower pattern. The upper pattern and the lower pattern may include different materials. The upper pattern and the lower pattern may include different dimensions. Separate regions may include separate ones of an NMOS or a PMOS. The semiconductor device may include gate electrodes on the compound semiconductor layer. Separate gate electrodes may intersect the separate fin patterns.
摘要:
Provided are a method and an apparatus for repairing a memory cell in a memory test system. A test device detects a fail address by testing a memory device according to a test command, and temporarily stores the fail address in a fail address memory (FAM). The fail address is transmitted to the memory device according to a fail address transmission mode, is temporarily stored in a temporary fail address storage of the memory device, and is then stored in an anti-fuse array, which is a non-volatile storage device. To secure the reliability of data, stored data can be read to verify the data and a verification result can be transmitted in series or in parallel to the test device.
摘要:
A semiconductor memory device includes a cell array and a refresh controller coupled to the cell array. The refresh controller is configured to insert at least one insertion refresh address in a first refresh address sequence based on address information about the cell array to generate a second refresh address sequence and to apply the second refresh address sequence to the cell array, such that selected cells may be refreshed more frequently without increasing an overall refresh rate.