Patent application number | Description | Published |
20080229776 | Centrifugal blower and air conditioner having the same - A centrifugal blower capable of preventing generation of a swirled air stream in a space between the inner surface of a casing and a side end of a centrifugal fan, and an air conditioner having the same. The centrifugal blower includes a casing having an air inlet, an air outlet, and a bell-mouth located near the air inlet, a centrifugal fan installed in the casing, and a stream-cutoff member provided at an inner surface of the casing around the bell-mouth to prevent an air stream from being swirled in a space between the inner surface of the casing and a side end of the centrifugal fan. | 09-25-2008 |
20080311440 | FUEL CELL SYSTEM AND METHOD OF OPERATING THE SAME - A fuel cell system includes a power unit that generates power using a fuel; a fuel storage unit that stores the fuel; a fuel supply device that conveys the fuel from the fuel storage unit to the power unit; and a control unit that controls the supply of the fuel and the generation of power. The fuel supply device includes a fuel supply control device that controls the supply of fuel according to a signal generated by the control unit. The control unit includes a fuel control unit that generates the signal according to the information of the fuel storage unit and the state information of the power unit. | 12-18-2008 |
20100089090 | Centrifugal fan and air conditioner having the same - A centrifugal fan, which equally maintains air-blowing capacities of both inlets regardless of different suction resistances of both inlets due to a driving device, and an air conditioner having the centrifugal fan. The centrifugal fan includes a rotary plate; first blades disposed at the edge of one surface of the rotary plate; and second blades disposed at the edge of the other surface of the rotary plate, and having a larger outer diameter than the outer diameter of the first blades. Thus, although a large flow resistance is generated at one inlet of the centrifugal fan due to the driving device, air-blowing capacities of both inlets are maintained equally. | 04-15-2010 |
20110273131 | FUEL CELL SYSTEM AND DRIVING METHOD THEREOF - A driving method of a fuel cell system, which includes a secondary battery and a fuel cell stack, is disclosed. The method includes detecting a state of charge (SOC) of the secondary battery, driving the fuel cell stack to an on-state whenever the SOC of the secondary battery is less than a predetermined first SOC, and driving the fuel cell stack to an off-state whenever the SOC of the secondary battery is greater than a predetermined second SOC. In this method, the fuel cell stack is driven at a fuel concentration having optimum efficiency, thereby increasing the fuel efficiency of the fuel cell system. | 11-10-2011 |
20120027571 | Fan and vibration-absorbing boss thereof - A fan including a hub part, a blade part and a vibration-absorbing boss, all constituent elements of which are injection molded, thereby reducing production costs. The fan has a minimized contact area between the vibration-absorbing boss and the hub part to prevent the vibration-absorbing boss from being deformed by high-temperature heat during insert injection molding of the hub part and the blade part while assuring sufficient strength of the hub part. | 02-02-2012 |
20120289019 | METHODS OF FORMING A PATTERN AND METHODS OF MANUFACTURING A SEMICONDUCTOR DEVICE USING THE SAME - In a method of forming a pattern, a plurality of first line patterns and first spacers filling spaces between the adjacent first line patterns are formed on an object layer. The first line patterns and the first spacers extend in a first direction. A plurality of second line patterns are formed on the first line patterns and the first spacers. The second line patterns extend in a second direction substantially perpendicular to the first direction. The first spacers are partially removed by a wet etching process. The object layer is etched using the first and second line patterns as an etching mask. | 11-15-2012 |
20130059220 | FUEL CELL SYSTEM AND DRIVING METHOD THEREOF - A fuel cell system for supplying power to a load includes: a plurality of fuel cell stacks; a plurality of DC/DC converters coupled to the plurality of fuel cell stacks; and a stack controller for estimating performance of the respective fuel cell stacks according to current amounts of the plurality of fuel cell stacks, and for controlling power converting efficiency of the respective DC/DC converters according to the performance of the fuel cell stacks to control output power generated by the fuel cell stacks. | 03-07-2013 |
20140017586 | FUEL CELL APPARATUS AND DRIVING METHOD THEREOF, AND COMPLEX CARTRIDGE FOR THE SAME - A fuel cell apparatus includes: a fuel cell stack comprising a plurality of unit cells; a mixer storing a fuel mixture solution supplied to the fuel cell stack; a mixture solution sensor measuring a residual amount of the fuel mixture solution stored in the mixer; a mixture solution control pump capable of supplying the fuel mixture solution stored in a cartridge to the mixer or withdrawing the fuel mixture solution stored in the mixer to the cartridge in order to adjust a quantity of fuel mixture solution in the mixer; and a control unit receiving a residual measurement signal from the mixture solution sensor indicating both quantity and fuel concentration of the fuel mixture solution stored in the mixer, and driving the mixture solution control pump to effect the desired quantity and fuel concentration of the fuel mixture solution in the mixer. | 01-16-2014 |
20140119938 | PROPELLER FAN AND AIR CONDITIONER HAVING THE SAME - Provided is a propeller fan including a hub having an oval shape in an axial direction, a plurality of wings that extend from the hub, and at least one reinforcement rib that extends from the hub and is formed closer to a leading edge of each of the plurality of wings. Through this configuration, the propeller fan has blowing efficiency and stiffness, and the weight and material cost of the propeller fan can be reduced. | 05-01-2014 |
20140338388 | PROPELLER FAN AND AIR CONDITIONER HAVING THE SAME - An air conditioner includes an outdoor unit that includes a compressor configured to compress a refrigerant, a condenser configured to condense the compressed refrigerant, and a blowing fan configured to blow outdoor air into a room, an indoor unit that discharges air heat-exchanged with the refrigerant flowing-in from the outdoor unit to the room, and a connection piping that connects the outdoor unit and the indoor unit. Here, a plurality of protrusions may be formed at least one side of the blowing fan, and a convex portion and a concave portion may be formed on a surface of the blowing fan so that the surface of the blowing fan is indented. | 11-20-2014 |