baber/WOPTO huggingface dataset:
Patent KR-20000059448-A (KR)
Inventor: KWON JAE GYU
IPC: F24F7/00
Filed: 1999-03-04
Abstract: PURPOSE: An automatic ventilation apparatus is provided to prevent degradation of the sensing performance and prevent reduction of life span of the gas sensing element by mounting the gas sensing element apart from a range hood or a ventilation fan for preventing introduction of oil or dust generated from food. CONSTITUTION: An automatic ventilation apparatus includes a gas sensing element(100) having a sensing part(110) having a gas sensor mounted at a predetermined position, of which resistance value varies according to a concentration of gas, and converting the change of the resistance of the gas sensor to a voltage change to output, a first control part(140) for outputting a predetermined control signal according to the voltage change input from the sensing part, a first output part(170) for outputting a predetermined signal according to the control signal output from the first control part, and a first power supply part(125), a ventilation element(210) mounted apart from the gas sensing element with a predetermined distance for driving a fan(212) according to the predetermined signal of the first output part, and a signal transmitting element(220) mounted between the gas sensing element and the ventilation element for transmitting the output signal of the first output part to the ventilation element.
Patent KR-19990064469-A (KR)
Title: 탈기제 에멀션
Filed: 1999-03-10
Abstract: 본 발명은 제지공정용 탈기제에 관한 것으로서, 상세하게는 탄소원자가 12∼30개로 이루어진 천연 또는 합성알코올에 에테르(ether), 에스테르(ester), 설페이트 등을 가하여 제조한, 안정한 '물 속 기름(oil-in-water)' 탈기제 에멀션 및 그 제조방법에 관한 것이다. 
     본 발명은, C 12-30 인 지방 알코올과 유화제인 폴리에틸렌 노닐 페닐 에테르(polyethylene nonyl phenyl ether), 폴리에틸렌 옥틸 페닐 에테르(polyethylene octyl phenyl ether), 소르비탄 지방산 에스테르(sorbitan fatty acid ester), 나트륨 폴리옥시에틸렌 알킬 아릴 설페이트(sodium polyoxyethylene alkyl aryl sulfate) 및 물로 이루어진 에멀션으로서, 25℃에서의 점도가 50∼500cps이고 입자 사이즈가 0.1∼25㎛인 물 속 기름 탈기제 및 그 제조방법을 제공한다. 
     본 발명에 의한 탈기제 에멀션은 대규모 설비 및 운영비가 소요되지 않는 화학적 탈기제로서 입도가 균일하고 미세하여 탈기효과가 우수하면서도 장기 보관성이 양호하다.
Patent KR-20000060368-A (KR)
Inventor: HA JONG HO
IPC: G06K7/00
Filed: 1999-03-15
Abstract: PURPOSE: A method for scanning is provided to supply a high quality scan by preventing the scanning operation stoppage caused by the lack of image memory during a manuscript scan and to reduce the noises occurred during a scanning operation. CONSTITUTION: A method for scanning is composed of operation, allocation, determination, and scanning. When the scanner is turned on, the controller operates the step motor and accelerates the motor to its normal speed. When the step motor reaches the normal speed, the controller requests the memory to allocate sufficient memory space for storing the data to be scanned(S710). The controller determines whether the image memory has secured a sufficient memory space(S720). If there is sufficient memory space, normal scanning is proceeded(S730). If it has been determined that the image memory cannot store the data to be scanned, a specified speed determined through the tests is used to scan the data at a low speed and a small amount of the scanned image is periodically stored in the image memory(S740). After conducting a low-speed scanning, the controller determines whether to continue the scanning or not(S750).
Patent KR-20000060814-A (KR)
Inventor: LEE IL HUI
IPC: G01N7/08
Filed: 1999-03-19
Abstract: PURPOSE: A flank collision tester for a door of a vehicle and a method thereof are provided to reduce costs and time for development by testing only door instead of an actual proto vehicle and easily test the flank collision through one door with changing a panel and a supplementary plate. CONSTITUTION: A flank collision tester for a door of a vehicle includes a jig fixing a door(1) at the straight state, a ram(4) impacting the door, a ram jig(5) slidably supporting the ram, and an actuator(3) impacting the door by forwardly and backwardly moving the ram. The actuator is operated to forwardly move the ram connected with the end part of a push rod(3a) as much as the impulse of a vehicle collision and impacted in a belt line part of the door, so that the extent of the breast injury applied to a dummy, is tested.
Patent KR-20000061429-A (KR)
Inventor: KANG YUN CHAN
IPC: C09K11/08
Filed: 1999-03-26
Abstract: PURPOSE: A process of preparing an inorganic luminescent material widely used for plasma display, field emission type display, conventional CRT and lamp using a filter expansion aerosol generator or an ultrasonic spray thermal decomposition apparatus is provided which can produce luminescent material particles free from defect and excellent in crystallinity and luminescent efficiency. CONSTITUTION: The process comprises the steps of obtaining 0.02 to 0.2 mol luminescent material particle precursor solution by dissolving an activator in distilled water; spraying the obtained precursor solution to form a droplet having a diameter of 5 to 20 micrometer using a filter expansion aerosol generator or an ultrasonic spray thermal decomposition apparatus; and converting to luminescent material particles through a drying, decomposition, reaction and crystallization process in a tubular reactor.
Patent KR-20000061644-A (KR)
Inventor: LEE GEUNG SIK
IPC: B65F1/00
Filed: 1999-03-29
Abstract: PURPOSE: A garbage box is provided to avoid environmental pollutions and to save social indirect expenses by solving problems related to clearance, bad smell, vinyl intensity and compression and discouraging using a disposable vinyl bag. CONSTITUTION: A bad smell problem is eliminated by perfectly closing a cover(1) with an auxiliary cover(2). The auxiliary cover holds a meter rate bag covered on a body. A space is prepared to induce and store wastes and compression is promoted by pressing the wastes. A bottom part(4) of a body prevents dirt water generated by a damage to a bag from flowing out by forming a certain height. Air in the body is let out upon putting the meter rate bag on the body by making four holes around a container(5). Thus, the bag is easily adhered to the body.
Patent KR-19990078550-A (KR)
Title: 밍크스크랩을이용한원단가공방법및그원단
Filed: 1999-04-15
Abstract: 본 발명은 밍크 모피에서 사용하기에 가장 좋지 않은 앞발 부분을 가공하여 원단화 하기 위한 가공방법에 관한 것으로, 특히 모피를 보다 효율적으로 가공하여, 그 표면적을 최대한 크게 활용함은 물론 원단화 되어 보다 효과적인 모피의 미적 장점을 살리고자 한 밍크 스크랩을 이용한 원단 가공방법에 관한 것이다. 
     상기 목적을 달성하기 위해 본 발명은 밍크 모피에서 앞발부 스크랩을 준비하는 단계와, 상기 스크랩의 중앙 상부에 V자형 절결부를 두어 절결편을 절단해 내는 제 2 스크랩을 재단하는 단계와, 상기 절결부의 경계를 맞대어 삼각형태의 제 3 스크랩을 재봉하는 단계와, 제 3 스크랩의 일측 변끼리 맞대어 사각형태의 제 4 스크랩을 재봉하는 단계와. 상기 제 4 스크랩의 일측 변끼리 맞대어 재봉함으로써 일정 면적의 원단을 가공하는 단계로써 밍크 스크랩을 이용한 원단 가공방법이 이루어진다. 
     그리고 상기 가공방법에 의해 밍크 모피에서 재단한 앞발부 스크랩의 중앙 상부에 V자형 절결부를 두어 절결편을 절단해 낸 제 2 스크랩의 상기 절결부의 경계를 맞대어 재봉한 삼각형태의 제 3 스크랩과, 상기 제 3 스크랩의 일측 변끼리 맞대어 재봉한 사각형태의 제 4 스크랩과. 상기 제 4 스크랩의 일측 변끼리 맞대어 재봉함으로써 일정 면적의 원단을 형성함으로써 밍크 스크랩을 이용한 원단이 형성된다.
Patent KR-20000066723-A (KR)
Inventor: KIM JAE HWAN
IPC: G01R23/02
Filed: 1999-04-20
Abstract: PURPOSE: A digital frequency detector is provided to detect a specific frequency of arbitrarily continuous digital frequencies by using a programmable logic design. CONSTITUTION: A digital frequency detector comprises one pulse generation portion(10), a high frequency counter portion(20), a comparator portion(30), a low frequency counter portion(40), and a comparison output portion(50). The one pulse generation portion compares sequentially input object signals with a reference clock and generates continuous two one pulses when detecting a rising edge. The high frequency counter portion receives the one pulse and counts the reference clock. The comparator portion compares the output of the high frequency counter portion with a falling edge of the object signal and outputs a comparison signal. The comparison output portion compares the two one pulses generated from the one pulse generation portion with the output of the low frequency counter portion and generates a detection signal.
Patent KR-19990064687-A (KR)
Title: 잉크젯 프린터의 카트리지 잉크 재 주입방법
IPC: B41J2/17
Filed: 1999-04-28
Abstract: 본 발명은 잉크젯 프린터의 카트리지 잉크 재 주입 방법에 관한 것이다. 
     본 발명은 잉크젯 프린터의 카트리지에 잉크의 재주입이 가능하고 고가인 카트리지의 재사용을 통해 경제적인 이득을 얻고자함을 목적으로 한다. 
     본 발명은 카트리지의 재 주입 구멍에 해당 잉크를 주입함에 있어서, 공기 주입시 공기의 상부 누출을 막으면서 공기의 주입을 용이하게 하기위한 구멍이 형성된 고무패드를 카트리지의 해당 재 주입 구멍에 대응시켜 양면 테이프로 부착하는 단계와, 일정량의 공기가 내장된 플랙시블한 공기공급 용기의 주입구를 상기 고무패드의 구멍에 끼워 공기공급 용기의 공기를 일정시간 카트리지 내부로 주입하여 카트리지 내부의 공기를 하부 노즐로 배출하는 단계와, 습분을 가진 받침부를 카트리지의 하부 헤드부에 밀착 시킨후 공기공급 용기내의 공기를 일정시간 동안 1-2회 반복하여 주입하여 주입된 잉크가 카트리지 내하방에 집중되도록 하는 단계로 이루어짐을 특징으로 한다.
Patent KR-19990088196-A (KR)
Title: 액정표시장치및그구동방법
IPC: G02F1/136
Filed: 1999-05-12
Abstract: 본 발명은 액정의 용량 변화에 따른 화소 전압의 변동을 제거함으로써, 각각의 1 필드 (프레임)마다 정확한 계조 표시(gradation display)를 행할 수 있는 고속 액정 표시 장치를 제공한다.  액티브 매트릭스형 액정 표시 장치의 구성을 가지며, 여기서 화소 전극은 복수의 주사선(101) 및 복수의 신호선(102)의 교차점 부근에 각각 배치된 MOS형 트랜지스터 회로에 의해 구동된다.  각각의 MOS형 트랜지스터 회로는: 게이트 전극이 주사선(101)에 접속되고 소스 전극과 드레인 전극 중의 하나가 신호선(102)에 접속되는 n형 MOS 트랜지스터(301); 신호선(102)에 접속되지 않은 n형 MOS 트랜지스터(301)의 소스 전극 또는 드레인 전극에 게이트 전극이 접속되고, 소스 전극과 드레인 전극 중의 하나가 주사선(101)에 접속되며, 소스 전극과 드레인 전극 중의 다른 하나가 화소 전극(107)에 접속되는 p형 MOS 트랜지스터(302); p형 MOS 트랜지스터(302)의 게이트 전극과 전압 보유 용량 전극(105)간에 형성되는 전압 보유 용량(106); 및 화소 전극(107)과 전압 보유 용량 전극(105)간에 접속되는 저항을 포함한다.
Patent KR-20000073882-A (KR)
Inventor: SHIN YANG SOO
IPC: B02B7/00
Filed: 1999-05-14
Abstract: PURPOSE: An apparatus for separating unpolished rice from chaff is provided to inhale chaff mixed with unpolished rice output from a rice huller with a suction force of a blower and separately discharge the unpolished rice and the inhaled chaff. CONSTITUTION: An apparatus for separating unpolished rice from chaff includes a rice charging part(A) having a rice distribution plate(60) and a rice inlet(20) at a top part of a separation case(10), an unpolished rice-chaffer separation part(B) mounted at a lower part of the rice charging part and having an air distribution plate(70) for uniformly dispersing the unpolished rice and the chaffer to primarily separate the rice from the chaffer by a blower(40) in a rice discharging direction and to straightly fall the rice, and a rice outlet(30), a residual unpolished rice separation part(C) formed beside the separation case with a predetermined space for secondarily separating the rice from the chaffer and having a residual unpolished rice outlet and an air controlling plate(90), and a blower part(D) having a suction fan and a chaffer outlet(50) for sucking the chaffer with air suction force to discharge at a side surface of the residual unpolished rice separation part.
Patent KR-20000073988-A (KR)
Inventor: KANG SEONG SIK
IPC: B29C33/60
Filed: 1999-05-17
Abstract: PURPOSE: An anti-adherent agent for non-vulcanizing rubber sheet having superior capability of preventing adhesion is provided to solve a sedimentation property which is one problem of anti-adherent agent for a blended rubber sheet mainly consisted of inorganic powder and also to solve the problems that a stacking property is deteriorated owing to excess application of surface active agent and that inspection is difficult owing to slip upon allocation inspection, so that an anti-adherent agent for non-vulcanizing rubber sheet having superior capability of preventing adhesion that a sufficient anti-adherent property is realized without scattering of powder on a rubber surface and strip property can be obtained. CONSTITUTION: An anti-adherent agent for non-vulcanizing rubber sheet having superior capability of preventing adhesion comprises inorganic powder consisted of silica, bentonite, and a calcium carbonate; alkylxylan non-ionic surface active agent and anionic surface active agent; and viscous increasing agent consisted of Na-carboxylmethylcellulous and hydrated starch.
Patent KR-20010001394-A (KR)
Inventor: CHA HUN SUNK
IPC: C10L5/44
Filed: 1999-06-03
Abstract: PURPOSE: Charcoal prepared by carbonizing a tree, in particularly red pine naturally growing only in Korea in the world and process for producing the same are provided, which can be used by mixing with eucalipyputs oil, oilve oil and brown rice paste. CONSTITUTION: Pine charcoal for medical use is prepared by mixing pine charcoal powder with a mesh of more than 300, eucalipyputs oil, oilve oil and brown rice paste and stored in granules in an airtight bottle. The charcoal has an effect on counteracting harmful effects of medicines, foods and environment.
Patent KR-20010002844-A (KR)
Title: Chip size package
Inventor: BAEK HYEONG GIL
IPC: H01L23/12
Filed: 1999-06-18
Abstract: PURPOSE: A chip size package is provided to reduce the noise by preventing the signals from interrupting to each other. CONSTITUTION: A chip size package comprises a semiconductor chip formed with a plurality of bonding pads(11). A lead frame(20) consisting of an inner lead(21) and an outer lead(22) is attached to an underside of the semiconductor chip. A pattern film consisting of an adhesive layer a metal pattern(32) and an insulating layer is attached to an underside of the lead frame(20). The insulating film is provided with a ball land for exposing the metal pattern(32). The pattern film of the metal pattern(32) and the bonding pads(11) are electrically connected to each other by a metal wire(50). A sealing member(70) is provided to seal the structure except for the outer lead(22) and the ball land. A solder ball(80) is mounted on the ball land.
Patent KR-20010002904-A (KR)
Inventor: KIM HAK CHOUL
IPC: B25F1/00
Filed: 1999-06-18
Abstract: PURPOSE: A portable tool equipped with a glass cutter is provided to be widely used, and facilitate the use of a glass cutter. CONSTITUTION: In a portable tool equipped with a glass cutter, numerous unit tools(2) are installed in a tool body(1). In case of need, each unit tool is unfolded to be used, and in case of carrying the unit tool is folded and then put into the inside of the tool body. In one end of the tool body, a unit tool of a glass cutter(3) is assembled to pivot, and a cutting tip(4) with high hardness is installed in a head part of the glass cutter. Numerous grooves of a polygon section are formed in the head part of the tool body so that the tool body and the each unit tool are assembled, and the rear end of the each unit tool is formed in the shape of the same section.
Patent KR-19990068829-A (KR)
Title: 액정디스플레이내구성시험장치
IPC: G02F1/13
Filed: 1999-06-26
Abstract: 본 발명은 대형 액정디스플레이의 테스트에 적합한 새로운 구조의 액정디스플레이 내구성 시험장치에 관한 것이다. 
     본 발명에 따르면 전면에 삽입구(10)가 형성되며 그 내부에는 내부공기의 온도, 습도 등을 조절할 수 있는 공기조절장치(14)가 구비된 본체(12)와, 이 본체(12)의 삽입구(10)를 통해 본체(12)에 인출 및 삽입가능하게 장착되며 LCD판(28)을 세워 설치할 수 있도록 구성된 프레임(26)과, 이 프레임(26)의 전면에 장착되어 프레임(26)을 본체에 삽입할 때 본체(12)의 전면에 밀착되어 삽입구(10)를 개폐할 수 있도록 된 전면판(34)을 포함하여 구성되며, 상기 프레임(26)에는 상기 LCD판(28)에 연결되어 LCD판(28)을 작동시킬 수 있도록 된 케이블단자(32)가 구비된 것을 특징으로 하는 액정디스플레이 내구성 시험장치가 제공된다.
Patent KR-20010005090-A (KR)
Inventor: LEE JAE JIN
IPC: G11C5/14
Filed: 1999-06-30
Abstract: PURPOSE: A power supplier is provided to increase an operation speed by supplying a high supply voltage in a block which an active mode regarding an operation is performed, and to minimize a leakage current generated when waiting for by supplying a low supply voltage in a block which a stand-by mode regardless of the operation is performed. CONSTITUTION: A power supplier for selectively supplying a power for a plurality of blocks(210,250) according to an operation mode includes a block selection portion(220) and a block power supply portion(230). The block selection portion generates a block selection signal enabled when the block(220) becomes active according to an external input address. The block power supply portion receives a first internal supply voltage or a second internal supply voltage lower than the first internal supply voltage and applies the first internal supply voltage or the second internal supply voltage for a supply voltage line(V_bl1) of the block in response to the block selection signal. At an active mode the first internal supply voltage is applied to the supply voltage line and at a stand-by mode the second internal supply voltage is applied to the supply voltage line.
Patent KR-20010008894-A (KR)
Inventor: JANG GYEONG GEUN
IPC: G09G3/36
Filed: 1999-07-05
Abstract: PURPOSE: A white screen error prevention device and a method of LCD are provided to automatically sense and solve the white screen error to enhance the convenience of a user and the quality of a product. CONSTITUTION: The white screen error prevention device of LCD comprises a data line driver(20), a gate line driver(18), an interface(10), an LCD controller(14), a DC/DC converter(16), a voltage detector and an interface controller(12). The interface(10) receives horizontal/vertical synchronizing signals and data signals to output the data signals with a size suitable to a resolution and a display screen through a predetermined signal processing step. The LCD controller(14) outputs the data signals transferred from the interface to the gate driver and data driver in accordance with a predetermined timing. The DC/DC converter(16) converts a DC voltage into DC voltages of different level to respectively supply the voltages to the LCD controller, the gate driver and the data driver.
Patent KR-20010009804-A (KR)
Title: Input apparatus for computer
Inventor: CHO GYEONG MI
IPC: G06F3/02
Filed: 1999-07-14
Abstract: PURPOSE: The computer input apparatus is provided to plan elevation of health by pressing and stimulating the hand consecutively through the protrusion and depression structure of the mouse. CONSTITUTION: A keyboard(21) has a plurality of key pads(22) mounted to a key frame(28). The respective key pads(22) have a groove(23) for mounting a light emitting diode(24) on its surface. The light emitting diode(24) is mounted within the groove(24) and the inlet of the groove(24) is covered with a transparent protective layer(25). The protective layer(25) may be made by resin of transparent materials and one or more protrude parts(25) are formed on its surface. The protective layer(25) may be made by polyethylene resin. The light emitted from the light emitting diode(24) may be transmitted through the protective layer(25) and irradiated to the surface of skin. The protrude part(26) stimulates the surface of skin of pressing fingers physically. The light emitting diode(24) can be constructed in order to generate light when pressing the key pad(22).
Patent KR-19990073510-A (KR)
Title: 남비
IPC: A47J27/02
Filed: 1999-07-14
Abstract: 본 발명은 음식물을 끓일 때 영양분의 유실을 최대한 방지할 수 있게 한 남비에 관한 것이다. 
     종래의 남비는 음식물을 끓일 때 발생하는 증기압에 의해 뚜껑이 벌럭이면서 음식물 속에 함유된 비교적 비중이 가벼운 영양분이 밖으로 배출되는 폐단과 이때 생긴 냄새 및 국물 등은 주방환경 공해를 유발하는 폐단이 있었던 것이다. 
     본 발명은 이상의 문제점을 해결하고자 발명한 것으로 이의 발명요지는 남비몸체(1)의 가장자리에 만곡돌출부(2)를 형성하면서 그 내측에는 첫단부(2')와 끝단부(2")사이에 반튜브형 와류실(3)을 형성하고 몸체(1)에 덮이는 뚜껑(4)의 가장 자리에는 만곡부(5)를 형성하면서 그 내측은 호형회류실(5')이 되게하되 그 저 면에는 받침부(4'), 걸림부(4") 및 낙수부(4"')를 형성하므로서 고열에 의해 가열된 국물이나 열증기가 몸체(1)의 가장자리에 형성된 회류부 및 뚜껑(4)의 가장자리에 형성된 회류부(5')에 의해 공실내로 재 유입되게 한 것이다.
Patent KR-20010026763-A (KR)
Inventor: KIM JONG MUN
IPC: F25B30/00
Filed: 1999-09-08
Abstract: PURPOSE: A refrigerant flow channel switching apparatus is provided to prevent start-up failure of the compressor and wear of components by preventing the refrigerant from flowing back toward the compressor. CONSTITUTION: An apparatus comprises a main valve body(10) having a direction converting chamber(10a); a slide assembly(20) installed in the direction converting chamber so as to reciprocate in linear manner, and which switches the flow channel of the direction converting chamber; a pilot valve(30) for allowing the slide assembly to reciprocate in linear manner by utilizing the high pressure refrigerant being discharged from the compressor; and a back flow prevention unit for preventing the vapor or liquid refrigerant from flowing from the direction converting chamber toward the compressor via a high pressure side connection port(11a) of the main valve body upon compressor shutdown. The back flow prevention unit includes a first pipe(51), a second pipe(52), an open/shut-off plate(53) for opening/shutting off the flow channel of first and second pipes, and a spring(54) for elastically supporting the open/shut-off plate.
Patent KR-20010027920-A (KR)
Inventor: KIM HUI SU
IPC: H01M6/00
Filed: 1999-09-16
Abstract: PURPOSE: An electrochemical cell having multiple laminated capacitor cells arranged at equal distances and a method for making thereof are introduced to eliminate heating process to allow heat-sensitive materials to be used in electrodes, compared to conventional sealing process. CONSTITUTION: An electrochemical cell is composed of a plurality of laminated capacitor cells, each cell unit comprising a first collector coated with a first electrode, a porous separator formed on the first electrode, a second collector coated with a second electrode corresponding to the porous separator. Between the first and second collectors, a gasket is provided to seal both of the collectors. The electrochemical cell includes electrolyte introduced in a gap between the collectors or impregnated into the first and second electrodes.
Patent KR-20010028971-A (KR)
Inventor: KANG DONG UK
IPC: F24F13/28
Filed: 1999-09-28
Abstract: PURPOSE: An air cleaner attachment structure for air conditioner is provided to allow the assembling work to be easily performed and reduce weight of the structure by allowing the air cleaner to be installed through the use of a single horizontal bracket. CONSTITUTION: An air cleaner attachment structure comprises a contact guide(61) mounted at the interior of the lower end of a suction grille(57); a horizontal bracket(62) coupled to both lower ends of the suction grille to be mounted to an air inlet port of a cabinet; and an air cleaner(60) having the top portion coupled to the bracket so as to cover the suction port of a fan housing and a lower contact point contacting the contact guide. An air filter(59) is arranged between the air cleaner and the suction grille. The horizontal bracket for supporting the air conditioner has a protrusion for forming a space for installation of the air conditioner, and the horizontal bracket has a bent portion formed at both ends of the bracket so as to increase rigidity of the horizontal bracket.
Patent KR-20010029015-A (KR)
Inventor: LEE DAE WON
IPC: F24F11/00
Filed: 1999-09-28
Abstract: PURPOSE: A method is provided to maintain the volume of air being discharged into the indoor area constant by changing the rotational velocity of the indoor fan motor in accordance with the change of louver angle. CONSTITUTION: A method comprises a step(S201) of allowing a micro computer to perceive the driving signal from a remote controller receiving unit and a key input unit; a step(S202) of allowing the micro computer to perceive an air velocity mode; a step(S203) of allowing the micro computer to perceive the preset signal for louver angle; a step(S204) allowing the micro computer to read out the preset value for the rotational velocity of the indoor fan motor corresponding to the preset air velocity mode and louver angle; a step(S205) of performing cooling operation by driving the indoor fan motor, outdoor fan motor and the compressor; a step(S206,S207) of allowing the micro computer to detect the actual rotation velocity of the indoor fan motor and comparing the detected rotation velocity with the preset rotation velocity; a step(S209) of proceeding the cooling operation if the rotational velocity of the indoor fan motor is equal to the preset velocity, allowing the micro computer to correct the rotational velocity of the motor through PID control if the rotational velocity is not equal to the preset velocity, and returning to the step(S206); and a step(S208) of allowing the micro computer to perform again the step(S203) when a user changes louver angle, and driving the indoor fan according to the preset value read by the micro computer according to the changed louver angle.