Abstract: The present invention provides a vacuum hopper precharger configured such that an electrolyte and gases contained in the electrolyte are suctioned by a vacuum hopper, the gases inside the electrolyte are discharged to the outside, and the electrolyte is stored in a vacuum nozzle of the vacuum hopper and then supplied into the secondary battery, thereby reducing defects of the secondary battery and lengthening the life thereof. The present invention comprises: a base frame 20 put in a floor and having an interior space 21; a gas removal part 30 installed on an upper portion of the interior space 21 and removing gases inside a secondary battery 100; an elevator 40 installed on a lower portion of the interior space 21 at an area corresponding to the gas removal part 30, receiving the secondary battery 100 on a top portion thereof, and moving the secondary battery 100 upward or downward; and a controller 50 controlling the gas removal part 30 and the elevator 40.

Abstract: A memory module includes a memory device configured to receive a first refresh command from a host, and perform a refresh operation in response to the first refresh command during a refresh time, and a computing unit configured to detect the first refresh command provided from the host to the memory device, and write a first error pattern at a first address of the memory device during the refresh time.

Abstract: Provided is a refrigerator having a simplified interior. The refrigerator includes a main body, a storage compartment formed in the main body and having a front side thereof open, a first door rotatably coupled to the main body to open and close a part of the storage compartment, a second door arranged below the first door and rotatably coupled to the main body to open and close a remaining part of the storage compartment, a filler rotatably provided on the first door or the second door to seal a gap between the first door and the second door in a state in which the first door and the second door are closed, a filler guide configured to guide the filler to be rotated in a first direction, and disposed on a sidewall of the storage compartment adjacent to a rotation axis of the first door and the second door, and a filler pusher configured to push the filler to be rotated in a second direction opposite to the first direction.

Abstract: The present invention relates to a polyethylene glycol derivative and a preparation method thereof. A preparation process of a polyethylene glycol derivative, according to the present invention, may provide a novel polyethylene glycol derivative which can be utilized in various ways as a drug linker, and is appropriate and effective for mass production and is advantageous in reproducible mass production of high-quality products.

Abstract: A drone equipped with fuel cell power pack capable of reducing weight by supplying power from a fuel cell while enabling long-term operation of a drone is provided. The drone equipped with fuel cell power pack may include a case including a wing part placed along an outer circumference of the case, a module frame placed in the case, a fuel cell unit placed in the module frame with a weight balance; and a gas tank mounted on the module frame and connected to the fuel cell unit. Because an overall weight balance of the fuel cell power pack itself can be maintained, even if it is integrally mounted inside the drone, the stable operation of the drone can be achieved.

Abstract: A fan motor for a vacuum cleaner includes a motor mount defining a cooling flow path inlet, an impeller, an impeller cover defining an air inlet, an air discharge opening defined at the motor mount and configured to discharge air to an outer space of the motor mount, and a cooling flow path outlet defined vertically above the motor mount. The cooling flow path inlet is configured to introduce air from the outer space of the motor mount into an inner space of the motor mount to cool the motor part, and the cooling flow path outlet is configured to discharge air from the inner space of the motor mount toward a space that is defined between the impeller and the air discharge opening based on the space between the impeller and the air discharge opening having a lower pressure than the inner space of the motor mount.

Abstract: A laminated core manufacturing apparatus includes an upper mold and a lower mold and enabling the manufacturing of a laminated core by stacking individual laminar members which are formed by having a strip which is sequentially transferred on an upper portion of the lower mold undergo a piercing process and a blanking process by means of punches provided to the upper mold, wherein the laminated core manufacturing apparatus further comprises: a squeeze ring installed on a lower portion of a blanking die for the blanking process; am elevating block installed on the lower portion of the squeeze ring; an elevating means for vertically moving the elevating block; and a heating block installed on an upper portion of the elevating block and positioned at an inner diameter surface of the laminated core.

Abstract: An apparatus for manufacturing a heat sealing-type rotational laminated core, includes an upper mold and a lower mold, and forming and stacking individual laminar members, the individual laminar members being formed by having a strip which is sequentially transferred on the upper portion of the lower mold undergone a piercing process and a blanking process by punches mounted on the upper mold.

Abstract: An apparatus for manufacturing a heat sealing-type rotational laminated core enabling the automatic separation of a laminated core, wherein the apparatus for manufacturing a laminated core includes: a squeeze ring installed on the lower portion of a blanking die for the blanking process; a heating means installed on the outer portion of the squeeze ring; a rotating die having the squeeze ring and the heating means installed therein to rotate by a predetermined pitch with the squeeze ring and the heating means; a vertically-moving die installed on one side of the blanking die and having a plurality of protruding portions and recessed portions formed; and a fixed die installed in the upper mold on the upper side of the vertically-moving die and having a plurality of recessed portions and protruding portions formed.

Abstract: A fuel cell power pack is provided. The fuel cell power pack may include a case, a gas tank placed in a gas tank mounting and removing part formed in the case, and a fuel cell unit placed in the case in a weight balance with the gas tank. According to the fuel cell power pack, it is possible to reduce weight by supplying power from a fuel cell while enabling long-term operation of a flying object such as a drone, to maintain an overall weight balance and achieve a stable operation of the drone, even if integrally mounted in the drone, to maintain a stable operating environment temperature of a stack by improving an air circulation structure, and to enhance the user's convenience with a gas supply structure that is easy to attach and detach the gas tank.

Abstract: A fan motor for a vacuum cleaner includes a motor mount defining a cooling flow path inlet, an impeller, an impeller cover defining an air inlet, an air discharge opening defined at the motor mount and configured to discharge air to an outer space of the motor mount, and a cooling flow path outlet defined vertically above the motor mount. The cooling flow path inlet is configured to introduce air from the outer space of the motor mount into an inner space of the motor mount to cool the motor part, and the cooling flow path outlet is configured to discharge air from the inner space of the motor mount toward a space that is defined between the impeller and the air discharge opening based on the space between the impeller and the air discharge opening having a lower pressure than the inner space of the motor mount.

Abstract: Disclosed herein is a refrigerator in which the structure of a door is improved. The refrigerator includes a main body having a storage compartment, a door rotatably coupled to the main body to open or close the storage compartment and having a door frame, a coupling member coupled to the door frame, and a door handle coupled with the coupling member in a sliding manner.

Abstract: A refrigerator includes a main body, a storage chamber formed in the main body, a shelf support portion provided at a rear side of the storage chamber, a plurality of shelves coupled to the shelf support portion so that the shelves are arranged next to each other, and an adjustment member coupled to the shelves so as to remove a height difference between the plurality of shelves. Coupling grooves are respectively formed in the shelves. The adjustment member is inserted into the coupling holes of the shelves and then rotates by a predetermined angle such that the adjustment member is fixed to the shelves. The adjustment member maintains a constant interval between the shelves and prevents the shelves from moving relative to each other. The adjustment member is easily coupled to and separated from others.

Abstract: Disclosed herein is a refrigerator which allows a user to check the status of a storage chamber with a camera without opening a door. The refrigerator includes a body having a storage chamber, a door rotatably coupled to the body to open or close the storage chamber, a frame coupled to the door and including a housing in which a camera configured to photograph the inside of the storage chamber is installed, and a first door bin configured to receive an object to be cooled, detachably coupled to the frame, and located on an upper portion of the housing to be supported by the housing.

Abstract: A light emitting device including a light emitting element for emitting blue light; and a fluorescent film including a single crystal fluorescent material or a polycrystalline fluorescent material, wherein the fluorescent film absorbs the blue light and emits light having a wavelength different from that of the blue light, wherein the fluorescent film faces a surface of the light emitting element, and the fluorescent material included in the fluorescent film is represented by the following Formula (1): Y3-x-yLxMyAl5O12 wherein L is Gd or Lu, and M is Ce, Tb, Eu, Yb, Pr, Tm, or Sm, 0?x?2.999, and 0.001?y?0.1.

Abstract: In accordance with an embodiment of the present disclosure, a cooking apparatus includes a casing, a cooking chamber provided inside the casing and including a discharge plate at which a plurality of outlet holes are formed, a tray provided at a bottom surface of the cooking chamber to support food, and a hot air discharging unit configured to discharge high-temperature air into the cooking chamber through the outlet holes, wherein the plurality of outlet holes are formed at a first area facing the tray.

Abstract: A refrigerator includes a main body, a storage chamber formed inside the main body, a door coupled to the main body to open and close the storage chamber, and a hinge coupled to the main body to rotatably support the door, the door includes a lower plate forming a lower surface of the door and a door cap coupled to the lower plate and having a hinge groove, the hinge includes a shaft inserted into the hinge groove, and the shaft includes a door closing preventer configured to prevent the door from being automatically closed in a state in which the door is opened.