Abstract: An air conditioner includes an outdoor unit, a plurality of mode change devices including at least one mode changer including a branch duct and a changing valve, and configured to receive a control signal from the outdoor unit to control an operation of the at least one mode changer. A plurality of indoor units are connected to the outdoor unit or the plurality of mode change devices. The outdoor unit may determine an operation mode to operate the plurality of mode change devices a plurality of times. Each of the plurality of indoor units may detect a temperature change of an indoor heat exchanger in response to the operation of the mode change devices, to determine the number of connected mode changers and a connectable mode changer candidate group based on the temperature change of the indoor heat exchanger.

Abstract: A heat exchanger cooling system may include a frame provided in a duct housing and formed of two sections, each of the two sections being divided into two sub-sections, a single motor provided in the frame, and a drive device configured to be driven by the single motor, wherein air flaps provided in the respective sub-sections are simultaneously controlled by operation of the drive device.

Abstract: A rear spoiler apparatus for a vehicle may include a main flap which is deployed by an operation force from an actuator and a support flap which is additionally deployed from the main flap, in which the support flap rotates to open together when the main flap rotates and the open angle of the support flap is greater than the open angle of the support flap.

Abstract: A rear spoiler apparatus for a vehicle may include a main flap which is deployed by an operation force from an actuator and a support flap which is additionally deployed from the main flap, in which the support flap rotates to open together when the main flap rotates and the open angle of the support flap is greater than the open angle of the support flap.

Abstract: A pyridine-based compound containing an isoxazoline ring represented by Formula 1 or an agrochemically acceptable salt thereof can be used as a herbicide. A method of preparing the pyridine-based compound containing an isoxazoline ring represented by Formula 1 includes reacting a compound represented by Formula 2 with a compound represented by Formula 3.

Abstract: A heat exchanger cooling system may include a frame provided in a duct housing and formed of two sections, each of the two sections being divided into two sub-sections, a single motor provided in the frame, and a drive device configured to be driven by the single motor, wherein air flaps provided in the respective sub-sections are simultaneously controlled by operation of the drive device.

Abstract: A system for controlling an air flow rate into a vehicle engine room may include a fan shroud in which a cooling fan including a fan motor and a fan blade is mounted, a radial portion which is provided in the fan shroud while corresponding to an operation area of the fan blade, including a shutter hub positioned to a center thereof and a plurality of radial units disposed to the shutter hub and including a plurality of radial shutters selectively unfolded from the shutter hub to external circumference directions or selectively folded to the shutter hub direction, and a radial unit operating portion unfolding the plurality of radial units from the shutter hub to the external circumference directions or folding the plurality of radial units to the shutter hub direction.

Abstract: Provided are an ortho-substituted phenylisoxazoline-based compound with 2,6-difluorobenzyloxymethyl represented by Formula 1, or a racemate or enantiomer thereof, a herbicide including the ortho-substituted phenylisoxazoline-based compound, or the racemate or enantiomer thereof as an active ingredient, and a method of selectively controlling grass weed comprising treating with the ortho-substituted phenylisoxazoline-based compound, or the racemate or enantiomer thereof before or after the grass weed emerges.

Abstract: Provided is an industrial method for the preparation of [5-{(2,6-difluorobenzyloxy)methyl}-4,5-dihydro-5-methyl-3-(3-methylthiophene-2-yl)-isoxazole](common name: methiozolin) represented by Formula 1 that is a herbicidal substance in high-purity.

Abstract: A system for controlling an air flow rate into a vehicle engine room may include a fan shroud in which a cooling fan including a fan motor and a fan blade is mounted, a radial portion which is provided in the fan shroud while corresponding to an operation area of the fan blade, including a shutter hub positioned to a center thereof and a plurality of radial units disposed to the shutter hub and including a plurality of radial shutters selectively unfolded from the shutter hub to external circumference directions or selectively folded to the shutter hub direction, and a radial unit operating portion unfolding the plurality of radial units from the shutter hub to the external circumference directions or folding the plurality of radial units to the shutter hub direction.

Abstract: Provided is an industrial method for the preparation of [5-{(2,6-difluorobenzyloxy)methyl}-4,5-dihydro-5-methyl-3-(3-methylthiophene-2-yl)-isoxazole](common name: methiozolin) represented by Formula 1 that is a herbicidal substance in high-purity.

Abstract: Provided are an ortho-substituted phenylisoxazoline-based compound with 2,6-difluorobenzyloxymethyl represented by Formula 1, or a racemate or enantiomer thereof, a herbicide including the ortho-substituted phenylisoxazoline-based compound, or the racemate or enantiomer thereof as an active ingredient, and a method of selectively controlling grass weed comprising treating with the ortho-substituted phenylisoxazoline-based compound, or the racemate or enantiomer thereof before or after the grass weed emerges.