Abstract: Multi-type air conditioner including an outdoor unit installed in an outdoor, including a compressor, a refrigerant flow controlling part connected to a discharge end of the compressor for guiding the refrigerant proper to operation conditions selectively, and an outdoor heat exchanger connected to the refrigerant flow controlling part, a plurality of indoor units each installed in a room and having an indoor heat exchanger and an electronic expansion valve having one end connected to one end of the indoor heat exchanger, a plurality of, at least two, distributors between the outdoor unit and the plurality of indoor units for improving installation freedom of the plurality of indoor units, selectively guiding refrigerant from the outdoor unit to the plurality of indoor units proper to operation conditions, and guiding the refrigerant passed through the indoor units to the outdoor unit again, and a device for shutting off introduction of the refrigerant into the distributors connected to inoperative indoor uni

Abstract: Multi-type air conditioner comprising an outdoor unit installed in an outdoor, comprising a compressor, a refrigerant flow controlling part connected to a discharge end of the compressor for guiding the refrigerant proper to operation conditions selectively, an outdoor heat exchanger connected to the refrigerant flow controlling part, a defrosting device at a side of the outdoor heat exchanger, and a piping system connected between the parts, a plurality of indoor units each installed in a room and having an indoor heat exchanger and an electronic expansion valve having one end connected to one end of the indoor heat exchanger, and a distributor between the outdoor unit and the indoor units for selectively guiding refrigerant from the outdoor unit to the plurality of indoor units proper to operation conditions, and guiding the refrigerant passed through the indoor units to the outdoor unit again.

Abstract: Method for operating a multi-type air conditioner including the steps of calculating a total heating load of the indoor units that are to carry out heating, and a total cooling load of the indoor units that are to carry out cooling, and determining an operation pattern of the outdoor unit according to the total cooling load and the total heating load. The method further including the steps of recalculating the total heating load and the total cooling load of the indoor units according to change of operation temperature of the indoor units, and changing the operation pattern of the outdoor units according to the recalculated total heating load and the total cooling load.

Abstract: Multi-type air conditioner including an outdoor unit having a compressor, an outdoor heat exchanger, a flow path control valve for controlling a flow path of the refrigerant from the compressor, an outdoor expansion device for expanding liquid refrigerant introduced thereto in a condensed state via indoor units and providing to the outdoor heat exchanger when the room is heated, and an outdoor unit piping system, a plurality of indoor units each having an indoor expansion device, an indoor heat exchanger, and an indoor piping system, a distributor for selectively distributing the refrigerant from the outdoor unit to the indoor units and returning to the outdoor unit again proper to respective operation modes, and means for super cooling the refrigerant condensed at the outdoor heat exchanger or the indoor heat exchangers and flowed to the indoor expansion devices or to the outdoor expansion device, thereby super cooling the refrigerant supplied to the evaporator.

Abstract: Disclosed is a multi-air conditioner including: an outdoor unit having a compressor, an outdoor heat exchanger, and an outdoor fan for ventilating the outdoor heat exchanger; a plurality of indoor units each having an electronic expansion valve and an indoor heat exchanger; a distributor for selectively guiding a refrigerant of the outdoor unit into the plurality of indoor units according to an operation condition; a four-way valve for selectively switching a flow direction of the refrigerant flowing through the outdoor heat exchanger; a selective expansion unit for selectively expanding the refrigerant according to the flow direction of the refrigerant; a gas-liquid separator for separating a vapor-phase refrigerant and a liquid-phase refrigerant, from the refrigerant flowing from the outdoor heat exchanger; and a connection tube part having a first connection tube for connecting the four-way valve with a distributor, a second connection tube for connecting an upper portion of the gas-liquid separator with t

Abstract: A turbofan for a window-type air conditioner which includes a hub, seven to eleven blades located at a predetermined separation from the hub and gradually narrowed in their width toward the hub; and a shroud attached to the blades in opposition to the hub, wherein the entire width of the turbofan is 35-45% of an outer diameter of the blades, the exit width of the turbofan is 50-60% of the entire width, the entrance width of the turbofan is 85-92% of the entire width, the hub-side inner diameter of the blades is 45-55% of the outer diameter of the blades, and the shroud-side inner diameter of the blades is 60-70% of the outer diameter of the blades.

Abstract: A turbo fan of a ceiling-embedded cassette type air conditioner. The turbo fan has a shroud for guiding a fluid introduced into the turbo fan, a hub having an outer diameter smaller than an inner diameter of the shroud, so as to facilitate an integral injection molding of the turbo fan, and blades extending between the shroud and the hub and being perpendicular to the shroud and the hub. Each of the blades has an inner diameter decreasingly inclined from the shroud to the hub, so that a quantity of sucked-air and a static pressure can be increased. The turbo fan not only can be integrally formed by injection molding but also can be manufactured at a reduced manufacturing cost.

Abstract: Disclosed is a blower in which a turbo fan is installed in a scroll housing having a cutoff with an inclination angle of about 50 to 80°, so that it is possible to suck an increased amount of air while reducing the flow resistance of air, thereby achieving an improvement in blowing efficiency while reducing generation of noise and vibrations.

Abstract: A blowing fan assembly for a window-type air conditioner which includes a scroll case and a turbofan disposed in the scroll case and connected with a driving motor, the turbofan having a hub, a plurality of blades which are located at a predetermined separation from the hub, and a shroud which is attached to distal ends of the plurality of blades in opposition to the hub. A depression is formed at the rear wall of the scroll case in a manner such that the diameter of the depression is greater than an outer diameter of the turbofan, and the turbofan is lop-sidedly positioned in the scroll case in such a way as to adjoin the depression, whereby the air passage which is defined between the shroud of the turbofan and a suction opening of the scroll case, is increased.

Abstract: A ceiling-embeded cassette type air conditioner has a driving fan, a heat exchanger, a cabinet, and a deflector. An air is controlled to have desired temperature and humidity while passing the driving fan and the heat exchanger. The cabinet and the heat exchanger define a fluid channel guided to exhaust ports between the cabinet and the heat exchanger. The deflector extends straight and inclined to the heat exchanger, so as to enable the air to smoothly flow toward the exhaust ports without a secondary air-flow. By the fluid channel, the quantity of blown-air is increased with the same motor while the noise is reduced with the same quantity of blown-air. Consequently, the performance and the efficiency of the air conditioner are improved.

Abstract: Turbo fan housing in a window type air conditioner including a flow guide including an inlet plate having a bell mouth for guiding room air, a base plate opposite to the inlet plate having an indoor fan mounted thereto for drawing the room air, and a separation wall between the inlet plate and the base plate to surround the turbo fan, an outlet formed by extension of the base plate and the separation wall from an opening formed on one side of the flow guide, and a cutoff formed on an inside of the separation wall connecting the outlet and the flow guide, wherein the indoor fan is a turbo fan, and a flow passage in the flow guide is formed to cause sharp flow direction changes, for converting a portion of dynamic pressure of the room air into a static pressure in the flow direction changes.

Abstract: A siroco fan of a window type air conditioner, in which the rotational speed can be increased without changing the quantity of the blowing air and without increasing the operational noise, thereby improving the marketability of the air conditioner. The siroco fan has a shroud and a plurality of blades disposed at the shroud and spaced apart at regular intervals, each of the blades having a trailing edge angle of 125° to 137°, a leading edge angle of 58° to 63°, a chord-to-pitch ratio of 0.75 to 0.85, an inner diameter-to-outer diameter ratio of 0.82 to 0.86, and a maximum camber position of 0.3 to 0.4 of a chord length of the blade.

Abstract: A ceiling-embeded cassette type air conditioner has a driving fan, a heat exchanger, a cabinet, and a deflector. An air is controlled to have desired temperature and humidity while passing the driving fan and the heat exchanger. The cabinet and the heat exchanger define a fluid channel guided to exhaust ports between the cabinet and the heat exchanger. The deflector extends straight and inclined to the heat exchanger, so as to enable the air to smoothly flow toward the exhaust ports without a secondary air-flow. By the fluid channel, the quantity of blown-air is increased with the same motor while the noise is reduced with the same quantity of blown-air. Consequently, the performance and the efficiency of the air conditioner are improved.

Abstract: Disclosed is a turbo fan of a ceiling-embeded cassette type air conditioner. The turbo fan has a shroud for guiding a fluid introduced into the turbo fan, a hub having an outer diameter smaller than an inner diameter of the shroud, so as to facilitate an integral injection molding of the turbo fan, and blades extending between the shroud and the hub and being perpendicular to the shroud and the hub. Each of the blades has an inner diameter decreasingly inclined from the shroud to the hub, so that a quantity of sucked-air and a static pressure can be increased. The turbo fan not only can be integrally formed by injection molding but also can be manufactured at a reduced manufacturing cost. Further, the turbo fan can effectively overcome the undesired problem of the prior art due to the modification in dimensions of the turbo fan, thereby providing a turbo fan exhibiting a quantity of blown-air and a static pressure which are the same or increased in comparison with the prior art.

Abstract: Turbo fan housing in a window type air conditioner including a flow guide including an inlet plate having a bell mouth for guiding room air, a base plate opposite to the inlet plate having an indoor fan mounted thereto for drawing the room air, and a separation wall between the inlet plate and the base plate to surround the turbo fan, an outlet formed by extension of the base plate and the separation wall from an opening formed on one side of the flow guide, and a cutoff formed on an inside of the separation wall connecting the outlet and the flow guide, wherein the indoor fan is a turbo fan, and a flow passage in the flow guide is formed to cause sharp flow direction changes, for converting a portion of dynamic pressure of the room air into a static pressure in the flow direction changes.

Abstract: A blowing fan assembly for a window-type air conditioner which includes a scroll case and a turbofan disposed in the scroll case and connected with a driving motor, the turbofan having a hub, a plurality of blades which are located at a predetermined separation from the hub, and a shroud which is attached to distal ends of the plurality of blades in opposition to the hub. A depression is formed at the rear wall of the scroll case in a manner such that the diameter of the depression is greater than an outer diameter of the turbofan, and the turbofan is lop-sidedly positioned in the scroll case in such a way as to adjoin the depression, whereby the air passage which is defined between the shroud of the turbofan and a suction opening of the scroll case, is increased.

Abstract: A turbofan for a window-type air conditioner which includes a hub, seven to eleven blades located at a predetermined separation from the hub and gradually narrowed in their width toward the hub; and a shroud attached to the blades in opposition to the hub, wherein the entire width of the turbofan is 35-45% of an outer diameter of the blades, the exit width of the turbofan is 50-60% of the entire width, the entrance width of the turbofan is 85-92% of the entire width, the hub-side inner diameter of the blades is 45-55% of the outer diameter of the blades, and the shroud-side inner diameter of the blades is 60-70% of the outer diameter of the blades.

Abstract: A siroco fan of a window type air conditioner, in which the rotational speed can be increased without changing the quantity of the blowing air and without increasing the operational noise, thereby improving the marketability of the air conditioner. The siroco fan has a shroud and a plurality of blades disposed at the shroud and spaced apart at regular intervals, each of the blades having a trailing edge angle of 125° to 137°, a leading edge angle of 58° to 63°, a chord-to-pitch ratio of 0.75 to 0.85, an inner diameter-to-outer diameter ratio of 0.82 to 0.86, and a maximum camber position of 0.3 to 0.4.

Abstract: The present invention relates to a novel compound of formula (I) and pharmaceutically acceptable salts, hydrates and solvates thereof which is an irreversible HIV protease inhibitor; a process for the preparation thereof; and a pharmaceutical composition containing the compound as an active ingredient which is useful for treating or preventing diseases caused by HIV infection.

Abstract: Cis-epoxide compounds of formula (I-3) and pharmaceutically acceptable salts, hydrates and solvates thereof: ##STR1## wherein: R.sup.1 is a cycloalkyl, or arly-substituted lower alkyl group;K and J are independently a group having the formula of ##STR2## wherein R.sup.18 is a lower alkyl group optionally substituted with an aryl radical; X is O, NH, or N--CH.sub.3 ; and R.sup.19 is an aromatic hetercyclic sysstem containing a nitrogen atom in its ring, or a lower alkyl group optionally substituted with an aryl radical, or a hydrogen;G is an amino acid which is linked to K-- and ##STR3## by peptide bonds in formula (I-3); Q is an amino acid which is linked toby peptide bonds in formula (I-3), or a group having the formula ofwherein R.sup.20 is a lower alkyl group optionally substituted with an aromatic radical; and Y is CH.sub.2, O or NH; andr is 0 or 1, except that Q is a group having the formula ofr is 0.