Abstract: A process for the control of boost pressure of a turbocharger in an internal combustion engine as a function of the density of the ambient air. The internal combustion engine has an exhaust gas turbocharger with control means to control the boost pressure in which the actual boost pressure is determined at specific time intervals and compared with assigned values for the desired boost pressure taken from stored compressor characteristics. The boost pressure is adjusted as necessary. The internal combustion engine further comprises an engine control device having a control unit and a data storage unit.

Abstract: Cooling systems and methods for cooling heat-generating equipment, such as steam driven turbines, can operate in multiple modes including a closed loop mode, an open loop mode and a helper mode. During normal operation in the closed loop mode, cooling water may be circulated in a closed cooling system through an integrated cooling tower, without drawing from or discharging into a water source, thereby minimizing the effect of the cooling system on the water source. In open loop operation, water can be drawn from a water source to cool the equipment without the use of the cooling tower and can then be discharged. The open loop mode can be advantageous when the cooling tower may be out of service. In the helper mode, cooling water drawn from a source cools the equipment and may then be partially or fully circulated through the cooling tower prior to discharge.

Abstract: A fuel injector has a metering valve arranged to open under a predetermined feed pressure which constitutes a first threshold pressure, and to remain open in response to said feed pressure increasing so as to deliver fuel to fuel utilization means. The flow rate of fuel passing through the injector is metered to feed said utilization means so long as the feed pressure remains below a second threshold pressure greater than the first threshold pressure. Above the second threshold pressure, the metering valve behaves like a fixed diaphragm as a function of the fluid flow sections formed therethrough. Individual adjustment means are provided so as to enable said second threshold pressure to be adjusted for each injector to ensure that fuel is injected at a uniform flow rate by all of the injectors in a combustion chamber.

Abstract: A transition duct having a panel assembly with an inlet end of generally circular cross section and an outlet end having a generally rectangular arc-like cross section is disclosed. The panel assembly has an uncoated internal profile substantially in accordance with coordinate values X, Y, and Z as set forth in Table 1 carried only to three decimal places wherein the coordinates are taken at a sweep angle &thgr; wherein &thgr; is an angle measured from said inlet end and X, Y, and Z are coordinates defining the panel assembly profile at each angle &thgr; from the inlet end. An alternate embodiment is also disclosed defining an envelope for the uncoated internal profile of the panel assembly.

Abstract: A gas turbine jet engine having a channel in a turbine casing through which a quantity of compressed air from a pressurized air source is introduced to start the gas turbine jet engine. The compressed air is expanded and accelerated by a series of diffusers and then impinges upon at least one impulse-type turbine bucket member located on the tip of a turbine blade to drive the turbine, which drives a compressor to start engine. Alternatively, the channel in the casing is located close to an axial compressor in a gas turbine engine's forward section and drives at least one turbine bucket member on a shrouded integrated compressor/turbine blade to drive the compressor to start the gas jet turbine engine.

Abstract: The liner supporting structure for the annular combustor of the present invention has a flexible connection member of connecting a structural body constituting a part of the combustor to a liner, the connection member having a first end positioned on a side of the structural body and a second end positioned on a side of the liner, the second end being disposed on an outer surface of an end part of the liner positioned on the side of the structural body; a first fixing means of fixing the first end of the connection member to the structural body; and a second fixing means of fixing the second end of the connection member to the end part of the liner.

Abstract: A gas turbine comprising a compressor, combustor and turbine further comprises (1) a cooling air system for supplying part of air compressed by a compressor to the high temperature section of the turbine, (2) a heater exchanger for exchanging heat of part of air compressed by the compressor, this heater being mounted on the cooling air system, and (3) a system for adjusting the air temperature downstream from the heater exchanger in conformity to the operation period of the turbine.

Abstract: The invention relates to a novel cooling system (100) in which waste heat to be dissipated is first absorbed by an electron emission layer (15). The heat induces a discharge of electrons (13) from the surface of the electron emission layer, whereby the electrons are drawn off by a suction electrode (10) which is located on a positive potential located opposite the emission layer (15). The thermal energy carried along by the electrons (13) induce a heat transfer from the electron emission layer (15) to the suction electrode (10). The intensity of the electron flow can be controlled by the bias voltage of a grid (12) which is arranged between the electron emission layer (15) and the suction electrode (10). The surface of the electron emission layer (15) is preferably composed of alkaline earth metals such as barium or cesium.

Abstract: A beverage cooler is provided with an improved thermoelectric chiller unit for chilling a supply of water or other selected beverage within a cooler reservoir. The improved thermoelectric chiller unit includes a thermoelectric heat transfer module captured by a spring mount with substantially uniform pressure distribution between a chiller probe for chilling the water within the cooler reservoir, and a heat exchanger for dissipating heat drawn from the chilled water. The cooler reservoir has a faucet mounted thereon for on-demand dispensing of the water, and is mounted as a removable unit within a cooler housing with a bottom wall of the reservoir defining an inverted cup-shaped receptacle for close slide-fit reception of the chiller probe.

Abstract: A pulse tube refrigeration system wherein the pulse tube working gas is cooled to a defined first stage temperature and is brought to a defined second stage temperature by operation of a regenerator and pulse tube, which are in flow communication through a cold heat exchanger, prior to providing refrigeration to a high temperature superconductor.

Abstract: A delivery system for transferring a delivery fluid from a delivery tank to a customer tank while maintaining a predetermined vessel pressure in the delivery tank, including a pump assembly pumping fluid from the delivery tank and a piping system passing the pumped fluid to the customer tank. A diverter diverts a slip stream portion of the pumped delivery fluid and a heat exchanger assembly selectively heats or cools the slip stream portion for return to the delivery tank. A sensor monitors a selected condition in the delivery tank and a controller responds to the sensor to control the amount and thermal condition of the slip stream returned to the delivery tank.

Abstract: A shaped article is capable of at least one of containing and delivering a cryogenic fluid. The article has a porous structure that restricts the passage of cryogenic fluid in the liquid phase while permitting the passage of cryogenic fluid in the gaseous phase. The article may be in the form of a tube or container. The article permits a liquid cryogen to be transported to a specific site, and then cool the site by means of conduction from the cold article and convection of cold gas, the phase change of the evaporating liquid greatly enhancing the heat loss.

Abstract: A process for vaporizing liquefied natural gas including passing water into a water tower so as to elevate a temperature of the water, pumping the elevated temperature water through a first heat exchanger, passing a circulating fluid through the first heat exchanger so as to transfer heat from the elevated temperature water into the circulating fluid, passing the liquefied natural gas into a second heat exchanger, pumping the heated circulating fluid from the first heat exchanger into the second heat exchanger so as to transfer heat from the circulating fluid to the liquefied natural gas, and discharging vaporized natural gas from the second heat exchanger.

Abstract: A shaped article is capable of at least one of containing and delivering a cryogenic fluid. The article has a porous structure that restricts the passage of cryogenic fluid in the liquid phase while permitting the passage of cryogenic fluid in the gaseous phase. The article may be in the form of a tube or container. The article permits a liquid cryogen to be transported to a specific site, and then cool the site by means of conduction from the cold article and convection of cold gas, the phase change of the evaporating liquid greatly enhancing the heat loss.

Abstract: Produce, especially processed produce, such as lettuce, broccoli and potatoes, is heat-shocked with water having an elevated temperature relative to the produce, to minimize discoloration of the produce from the processing after the heat shock, the produce is low pressure or vacuum cooled and dried to remove heat-shock water adsorbed and absorbed by the produce.

Abstract: A multi-temperature refrigerator, of which the evaporators serving for cooling the compartments of different temperature can be activated separately through a 3/2-way solenoid valve, the solenoid valve being followed, for lowering the pressure of the refrigerant in relation to the respective evaporator, by a throttle line includes a marking on the throttle for mounting the line in a correct position on the solenoid valve. The invention forms the marking for the throttle lines with a separate component that can be applied to the throttle line positively and/or nonpositively.

Abstract: The expansion device in a refrigeration or air conditioning system is an expressor. The expresser is made up of a twin screw expander and a twin screw compressor with rotors of the expander functioning as timing gears.

Abstract: A refrigerator and a method for operating the same. The refrigerator comprises a single media controller installed on a single board together with a refrigerator microcomputer, which controls the entire operation of the refrigerator, for not only displaying information regarding internal environments of the refrigerator on a display unit installed on the outer surface of the refrigerator, but also connecting the refrigerator to an external network, such as the Internet, to enable a user to access the Internet through the refrigerator. Therefore, the refrigerator can be reduced in its assembling time and manufacturing cost and be increased in its assembling efficiency.

Abstract: An air conditioner employing a flammable refrigerant, comprises a sensor (11) that is provided on an external surface of an indoor unit (1) and detects the flammable refrigerant gas, in order to prevent the accident of a fire or the like even when the flammable refrigerant leaks. Furthermore, an air conditioner is provided with a indoor unit housing a heat exchanger (3) and a fan (7) inside its casing (2) that has an inlet port (8) and an outlet port (5). The air conditioner rotates the fan (7) and flows the flammable refrigerant through the heat exchanger (3) during operation, performing heat exchange between air taken into the casing (2) through the inlet port (8) and the flammable refrigerant, and blows out the air that has undergone the heat exchange to the inside of a room through the outlet port (5).

Abstract: A refrigeration system for cooling a logic module includes an evaporator housing including an evaporator block in thermal communication with the logic module. The evaporator housing includes a humidity sensor for detecting a humidity within the evaporator housing. The system further comprises a controller for controlling a refrigeration unit supplying cold refrigerant to the evaporator block in response to the operating conditions of the logic module and the temperature of the evaporator block. In another aspect of the invention, two modular refrigeration units are independently operable to cool the evaporator block, and each refrigeration unit is controllable in various modes of operation including an enabled mode in which it is ready to cool the evaporator and an on mode in which it is actively cooling the evaporator. In another aspect of the invention, the evaporator block and a heater on a reverse side of the circuit board are particularly controlled during concurrent repair operations.

Abstract: In accordance with the present invention, a space conditioning system having multi-stage cooling and dehumidification capability is provided. The system includes plural refrigeration circuits operable in a cooling mode to provide cooled air to an indoor space. At least one of the refrigeration circuits is also operable in a reheat mode, wherein air is dehumidified by cooling it and then reheating it before it is supplied to the space. A control system is provided for controlling the operation of the refrigeration circuits to satisfy both a demand for cooling and a demand for dehumidification. Depending upon the level of demand for cooling, the system is operated to satisfy the dehumidification demand and the cooling demand simultaneously. However, in response to a higher level of demand for cooling (e.g., a second stage demand, or in some cases, a higher demand), the demand for cooling takes priority over the dehumidification demand.

Abstract: An air conditioning system (multi-air conditioner system) which has a plurality of indoor units installed inside of a predefined space for performing air conditioning and an outdoor unit installed outside of the space for controlling the indoor units, and a method for controlling the same. In an installation process, an installer need not personally set addresses in the indoor units one by one, because the outdoor unit automatically sets the addresses in the indoor units. Therefore, as compared with conventional air conditioning systems, a period of time required for the address setting and an error occurrence probability can be reduced and the convenience to the user can be increased. Furthermore, the address setting can automatically be conducted without additionally using separate hardware modules, thereby reducing parts costs required in manufacturing a multi-air conditioner.

Abstract: In a concentrated cooling apparatus of a refrigerator capable of improving cooling efficiency and performance by discharging cold air through only a nozzle at a high-temperature load occurred region among nozzles installed at a side wall of a chilling chamber in order to discharge cold air intensively and preventing a nozzle and an infrared sensor installed at the side wall of the chilling chamber from being icebound, the apparatus includes a housing respectively installed at more than one cold air guide path formed at a side wall of a chilling chamber so as to guide cold air to the side wall of the chilling chamber; a nozzle rotationally supported by the housing and jetting cold air intensively to a high-temperature load occurred region when a high-temperature load occurs inside the chilling chamber; an infrared sensor installed at the front of the nozzle and sensing the high-temperature load occurred region while being rotated with the nozzle; and a nozzle cover installed at the upper surface of the housing

Abstract: A vapor compression refrigeration and freezer system includes a compressor, a condenser, an expansion devise and an evaporator which includes an evaporator coil having an inlet and an outlet which coil is in heat exchange relation with an air medium along substantially the entire coil length. The inlet to the evaporator coil is in flow communication with an outlet of the expansion devise via an evaporator feedline.

Abstract: A refrigeration system for cooling a logic module includes an evaporator housing including an evaporator block in thermal communication with the logic module. The evaporator housing includes a humidity sensor for detecting a humidity within the evaporator housing. The system further comprises a controller for controlling a refrigeration unit supplying cold refrigerant to the evaporator block in response to the operating conditions of the logic module and the temperature of the evaporator block. In another aspect of the invention, two modular refrigeration units are independently operable to cool the evaporator block, and each refrigeration unit is controllable in various modes of operation including an enabled mode in which it is ready to cool the evaporator and an on mode in which it is actively cooling the evaporator. In another aspect of the invention, the evaporator block and a heater on a reverse side of the circuit board are particularly controlled during concurrent repair operations.

Abstract: A method and a device for operating a refrigerant system in an air conditioning unit for an automobile, in which air flowing through an evaporator is cooled via a refrigerant, the delivery rate of which is set by means of a compressor operated by a drive. The speed of the drive, operated independently of the automobile engine, is determined as a function of a suction pressure to be set on the compressor, thereby providing optimal energy consumption by the system.

Abstract: A vehicle air conditioning system mountable on a vehicle has the control function of stopping a vehicle engine automatically when the vehicle stops (eco-run vehicle). The system includes a variable displacement compressor driven by the vehicle engine, and a stop time of the vehicle engine is ensured when the vehicle stops. When the engine is running, the displacement of the variable displacement compressor is adjusted to control the temperature of an evaporator. When the vehicle engine stop request is issued when the vehicle is stopped, the compressor is kept at its maximum displacement and the vehicle engine is either stopped or activated depending on the temperature of the evaporator to control the on and off modes of the compressor.

Abstract: A refrigeration system for cooling a logic module includes an evaporator housing including an evaporator block in thermal communication with the logic module. The evaporator housing includes a humidity sensor for detecting a humidity within the evaporator housing. The system further comprises a controller for controlling a refrigeration unit supplying cold refrigerant to the evaporator block in response to the operating conditions of the logic module and the temperature of the evaporator block. In another aspect of the invention, two modular refrigeration units are independently operable to cool the evaporator block, and each refrigeration unit is controllable in various modes of operation including an enabled mode in which it is ready to cool the evaporator and an on mode in which it is actively cooling the evaporator. In another aspect of the invention, the evaporator block and a heater on a reverse side of the circuit board are particularly controlled during concurrent repair operations.

Abstract: A separate-type air conditioner that can reduce the effect of voltage fluctuations in a commercial power supply (12) on a compressor (11), reduce material costs while maintaining vibrations of an outdoor unit (2) at low levels, and improve working efficiency during an assembly operation. The outdoor unit (2) includes a voltage correction circuit (14) to keep an output voltage to the compressor (11) constant (optimum) irrespective of the voltage fluctuations in the commercial power supply (12).

Abstract: A modular semiconductor chip cooling system having a readily openable enclosure defining a chamber configured to hold a printed circuit board carrying components to be cooled. The enclosure can include a reservoir, a condenser and a pump. Sprayers within the chamber are adjustably mounted on one or more brackets to allow each sprayer to be set for the individual height of its respective component. The enclosure can be readily removed from a computer system through a quick release connection. The computer system can include a condenser and pump to operate all its modular cooling systems, removing the condensing function from the individual modules.

Abstract: A dehumidifying apparatus capable of continuously supplying dry air having an absolute humidity of 4 g/kgDA or lower is provided.

Abstract: An apparatus for extracting potable water from the environment air comprises a moisture collecting system having dew-forming surfaces and disposed so that the air drawn into the apparatus passes therethrough and moisture from the air condenses in the dew-forming surfaces. The apparatus also comprises a water reservoir capable of receiving water collected as moisture in the moisture collecting system. The water reservoir has a bottom and a side surface constituting a surface of revolution around a longitudinal axis of the reservoir, the reservoir having an outlet port formed at the bottom thereof along the longitudinal axis, for the withdrawal of water from the reservoir, and a circulation inlet port formed in the side surface. The circulation inlet port is designed so as to enable the introduction of water into the reservoir tangentially to the surface.

Abstract: A device for muffing the sound of water droplets falling onto an upper surface of the housing of an air conditioning unit that extends beyond the side of a building is disclosed. The muffling device comprises a plurality of screens of different fineness of mesh, and a frame for holding the plurality of screens arranged in a progressively finer parallel spaced-apart relationship. The device is secured to the housing of the air conditioning unit with the finest mesh screen closest to and in parallel relation with the upper surface of the housing.

Abstract: A process employing a rotary axial turbine, and a nozzle, that includes providing a working fluid expansible from a characteristic supercritical region into the wet region, expanding the fluid from said supercritical region into the wet region via the nozzle and turbine blades, and providing an output shaft driven by the turbine.

Abstract: A portable soft sided insulated container has an impermeable liner that provides a liquid holding barrier. The liner is folded from a single monolithic plastic sheet to reduce or eliminate the need for heat welded seams. The liner seats within the container and has a releasable attachment around its lip for mating with the rim of the container. The container has an insulated lid so that the entire assembly may be closed. The liner can be removed for cleaning, or replacement if punctured. When not in use the entire assembly can be folded into a collapsed position for storage. The container has two storage chambers that share a common insulated dividing wall.

Abstract: An object of the present invention is to provide a refrigerant in which an odorant is added, the odorant being compatible with refrigerants and refrigerating device oils, and having no reactivity with refrigerating device oils and materials forming refrigerating circuits, and to provide a refrigerating device in which the refrigerant is circulated in the refrigerating circuit. A refrigerant whose main component is a hydrocarbon having 1 to 4 carbon atoms, or a flammable hydrocarbon fluoride obtained when one or more hydrogen atoms of the hydrocarbon is substituted by fluorine atoms, the refrigerant containing a tetrahydrothiophene as an odorant, and a refrigerating device in which the refrigerant is circulated are provided.

Abstract: An accumulator dehydrator for cooling circuits with a simplified structure comprising a hollow outer casing (12), cylindrical in shape, provided with a base (13) with a raised thickness, in which an inlet hole (14) and an outlet hole (16) are produced, said hollow outer casing (12) containing a filter element (22), a desiccant bag (31), a U-shaped tube and a diffuser element, in which the U-shaped tube, the filter element and the diffuser element are produced in a single moulded piece (19, 20, 22).

Abstract: A method and apparatus is disclosed to relieve liquid pressure from a receiver to a condenser in a cooling system that operates under a variety of ambient temperature conditions. To relieve excess pressure in the receiver and to prevent the venting of refrigerant through a relief valve, a pressure-balancing system is connected between the condenser and the receiver of the cooling system. In one embodiment, the pressure-balancing system includes a check valve and a pressure-balancing valve. The pressure-balancing valve bypasses the check valve. The check valve permits the flow of refrigerant in one direction from the condenser to the receiver. The pressure-balancing valve permits the flow of refrigerant in an opposite direction from the receiver to the condenser in order to maintain the pressure in the receiver below a maximum pressure level. The pressure-balancing valve may be installed on a bypass line parallel to the check valve.

Abstract: A closed circuit refrigeration system of successive coalescent/depth filters provides the almost total removal of liquid refrigerants from a refrigeration gas stream. The liquid refrigerant so extracted is then be returned to the suction side through a metering device such as a capillary line to provide intermediate cooling of the oncoming discharge gas. The auto cascade system utilizes short path plate heat exchangers. The properties of coalescent/depth filters place a physical barrier between the differing temperature/pressure regimes on the discharge side of the system. The provision of a start valve in a line connecting the gas discharge path and the return path close to the cryo-coil enables the use of hermetic compressors and eliminates the requirement for supplementary pressure vessels within auto-cascade cryogenic refrigeration systems.

Abstract: A refrigeration system comprises a compressor for increasing a temperature and a pressure of a refrigerant vapor, a condenser fluidly coupled to the compressor for condensing the refrigerant vapor, an expansion device for decreasing the temperature and pressure of a refrigerant liquid, and an evaporator fluidly coupled to the expansion device for evaporating the refrigerant liquid by transferring thermal energy between the refrigerant liquid and a second fluid. The refrigeration system also comprises a heat exchanger having a first flow path fluidly coupled to the compressor and the evaporator and a second flow path fluidly coupled to the condenser and the expansion valve. The heat exchanger is adapted to superheat the refrigerant vapor in the first flow path and subcool the refrigerant liquid in the second flow path by transferring thermal energy between the refrigerant in the first and second flow paths.

Abstract: An end heating and processing method of an optical fiber preform. In this method, an optical fiber preform is processed by heating and melting an end of a vitrified optical fiber preform including a core portion and a cladding portion formed on an outer circumference thereof to process the end having a shape for drawing as an optical fiber.

Abstract: A three-dimensional knit fabric having front and back knit layers and a monofilament yarn connecting the knit layers to each other, characterized in that the curvature of the monofilament yarn in the three-dimensional knit fabric is in a range from 0.01 to 1.6, and the bending elongation of the monofilament is 20% or less when the three-dimensional knit fabric is compressed to 50%. The three-dimensional knit fabric has a cushioning property in springiness which does not deteriorate even if the fabric is repeatedly used many times or for a long time, and thus this fabric is excellent in terms of durability of the cushioning property. In particular, the fabric is suitable for use as a hammock type seat and exhibits a cushioning property having a favorable springy feeling as well as a good fit feel.

Abstract: A trailer hitch locking system is provided for securing a trailer while hitched to a vehicle or protecting the trailer from theft while unhitched. The locking system includes a hitch lock, a ball lock, and a receiver pin lock.

Abstract: A remote-controlled door lock includes a lock shell provided inside with a battery base, a circuit board, a deadbolt and two electromagnetic valves. The deadbolt has a through hole connected sidewise to a slide slot with a smaller breadth than the diameter of the through hole. The two electromagnetic valves are respectively positioned on and under the door bolt. The two electromagnetic valves are controlled to operate by a remote controller and actuate the deadbolt to move to a limited position. The deadbolt cannot be unlocked with a key only before it is released by a remote controller, thus obtaining the best effect of anti-theft.

Abstract: The invention discloses a container, usable as an ash-tray and/or as a food container, comprising first and second members removable secured together. The second member can be permanently or removably secured to a supporting surface. The first and second members are secured together by a locking device.

Abstract: A kit for an external vehicle door handle has a carrier fastened at an inner side of a door panel and a handle mounted on the carrier from the exterior of the door. The carrier has a pivotable bearing arm with a coupling receptacle and the handle has a shaft end with a coupling plug engaging the coupling receptacle of the bearing arm during mounting of the handle. A locking device accessible through a hole in a door folding secures in a locking position the coupling plug and the coupling receptacle for coupling the handle and the bearing arm. The bearing arm has a spring-loaded locking member with a locking location and the coupling plug has a matching counter locking location. The locking device has an adjustable obstacle projecting into the restoring path of the locking member and locking the locking member engaging the counter locking member.

Abstract: A flange junction lock has two identical approximately L-shaped parts, each with a circular nut or bolt cover mounted to a support neck forming one end portion of a shaft having a series of holes along the shaft leading to a free end, the holes being of such size as to accommodate a lock such as a padlock, and a shaft receiver attached to the support neck forming a slot to receive the shaft of the other L-shaped part. The circular covers fit over a nut and bolt head or nut on the opposite sides of the joined flanges while a lock, such as a padlock, secures the shafts together. Each cylindrical cover has a partial end cap which allows the threaded portion of a bolt to extend through and beyond the cylindrical cover while blocking insertion of a socket wrench.

Abstract: A cylinder assembly for a door lock has a housing, a cylinder, an actuating tongue and a cap. The cylinder is securely held on the housing with a fastener and rotatably received in a through hole in the housing. A recess is defined in one end of the cylinder. A curved channel is defined in a face defining the recess. A connecting portion is formed on the first end of the tongue and is rotatably received in the recess in the cylinder. A protrusion protrudes from the first end of the actuating tongue and extends into the curved channel in the cylinder. The cap is mounted around the actuating tongue and secured to the second end of the cylinder. Accordingly, the cylinder can be easily assembled to or disassembled from the housing by means of attaching or removing the fastener.

Abstract: An inner unlatching mechanism for a bathroom lock includes an inner unlatching rod, a fixing member, a locking wheel, and a follower wheel. The fixing member is fixed to an inner rose and mounted around the inner S unlatching rod. A truncated conic unlatching groove and a locking groove are defined in a side of the fixing member. The locking groove has a depth rod not equal to that of the unlatching groove. When an inner handle is turned to turn an inner spindle through 40-60 degrees, an engaging block of the locking wheel is moved into the unlatching groove of the fixing member, and an arcuate drive portion of the locking wheel is disengaged from a notch of the follower wheel, thereby achieving the unlatching function.

Abstract: A lock furnished with a replaceable lock core, in which the inner lock assembly includes a lock core, a sleeve, and a control ring; the inner lock assembly is mounted in a fixed lock casing; the inner lock assembly and the lock casing are assembled together by means of a catch pin; the key normally used for unlocking the lock can only be turned clockwise without hindering the catching function between he inner lock assembly and the lock casing; when an inner lock assembly is replaced, the key should be inserted for unlocking, and then turned counter-clockwise so as to release the catching function between the lock casing and the inner lock assembly; then, pull the key outwards so as to pull out the inner lock assembly simultaneously, and the replacement of a new lock core for the lock casing is done simply.