Abstract: A reheat combustion system for a gas turbine comprises a mixing tube adapted to be fed by products of a primary combustion zone of the gas turbine and by fuel injected by a lance; a combustion chamber bed by the said mixing tube; and at least one perforated acoustic screen. The or each said acoustic screen is provided inside the mixing tube or the combustion chamber, at a position where it faces, but is spaced from, a perforated wall thereof. In use, the perforated wall experiences impingement cooling as it admits air into the combustion system for onward passage through the perforations of the said acoustic screen, and the acoustic screen damps acoustic pulsations in the mixing tube and combustion chamber.

Abstract: An innovated way of producing propulsion by rotating a bent circular tube while mass is circulating thru it.

Abstract: Disclosed is a propulsion system for a spacecraft. The propulsion system includes a supply of oxidizer and at least one nozzle. A conduit fluidly couples the supply of oxidizer and the nozzle. The conduit provides a pathway for oxidizer to flow in a downstream direction from the supply of oxidizer toward and into the nozzle. A pressure regulator is coupled to the conduit and is interposed between the supply of oxidizer and the nozzle, wherein the pressure regulator regulates the pressure of oxidizer flowing through the conduit and downstream of the pressure regulator to a pressure at or below the pressure required to maintain the oxidizer in a gas state to ensure that the any oxidizer flowing through the conduit is in a gas state prior to entering the nozzle. The conduit supplies oxidizer from the supply of oxidizer to a hybrid rocket motor.

Abstract: An aircraft structure includes a duct having an inlet for fluid flow into the duct and a first outlet for fluid flow out of the duct. The duct is configured to guide fluid flow out of the duct through the first outlet in an at least partially reversed direction relative to fluid flow into the duct to thereby reverse thrust.

Abstract: A gas turbine engine exhaust nozzle arrangement for the flow of exhaust gases therethrough between an upstream end and a downstream end thereof comprising a nozzle and a plurality of tabs which extend in a generally axial direction from a downstream portion of the nozzle wherein the nozzle further comprises an actuation mechanism capable of moving the tabs between a first deployed position, where the tabs interact with a gas stream to reduce exhaust noise thereof, and a second non-deployed position, where the tabs are substantially aerodynamically unobtrusive.

Abstract: An exhaust nozzle assembly for a gas turbine engine, the assembly comprises a main axis, an inner nozzle, an outer nozzle, a translatable centre-body and a means for translating the centre-body between a forward position and a rearward position. The centre-body is disposed radially inwardly of the inner nozzle thereby partly defining an inner duct for a core engine gas flow, an outer duct for a bypass gas flow is defined by the inner nozzle and the outer nozzle. The outer nozzle extends downstream of the inner nozzle and with the centre-body defines a final mixing duct having a final exhaust exit area. When the centre-body is in the forward position the final exhaust exit area is at a maximum area, and when the centre-body is in a rearward position the final exhaust exit area is at a minimum area.

Abstract: An adapter device for controlling a rocket engine nozzle under conditions of external pressure that can lead to the jet separating inside the nozzle, the nozzle being fitted with a diverging portion that is movably mounted relative to a stationary portion of the nozzle, thrust deflection then being achieved by swivelling the diverging portion so as to deflect the jet of combustion gas in contact with the inside wall of the diverging portion. The device includes a structure disposed inside the diverging portion in such a manner as to reduce the diverging nature of the flow section thereof and to increase the bearing area of pressure forces exerted by the jet on the diverging portion during swivelling thereof.

Abstract: The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter by adjusting the engine air/fuel ratio based on estimates of the actual amount of oxidants stored in the catalyst. The oxidant storage capacity of the catalyst is adjusted by controlling engine spark in response to an estimate of a current amount of oxidants stored in the catalyst and an estimate of the total available oxidant storage capacity of the catalyst. To maintain engine speed in spite of adjustments to the engine spark, the engine air mass is also adjusted.

Abstract: An exhaust gas purifying device for an engine according to the present invention includes a NOx absorbing catalytic converter provided in an exhaust path of the engine, an exhaust light oil adding injector which supplies a reducing agent component into the exhaust path, a control unit which executes the rich spike operation that controls an air-fuel ratio to the rich side per predetermined time, which adds the HC component to the NOx absorbing catalytic converter, and which heats to an S purge temperature or higher so as to eliminate a sulfur component absorbed by the NOx absorbing catalytic converter, and a catalyst temperature measuring sensor which measures the temperature of the NOx absorbing catalytic converter, wherein the control unit controls an operation cycle of the rich spike operation based on the deviation of the S purge temperature with respect to the temperature measured by the catalyst temperature measuring sensor.

Abstract: An exhaust gas system for converting harmful substances of an exhaust gas of a mobile internal combustion engine includes at least one reducing agent feed, a catalytic converter, a filter element and an exhaust pipe. The reducing agent feed opens into the exhaust pipe upstream of the filter element, while the catalytic converter is disposed downstream of the filter element, as seen in exhaust gas flow direction. Additional components, such as a mixer, a pre-catalytic converter and a heating element, etc. used for purifying exhaust gas, may also be advantageously integrated into the system.

Abstract: A pollution control system and method for a compressor for compressing gas, according to which a combustion engine is connected to the compressor for driving the compressor, and the products of combustion from the engine are passed into the flow line connecting the source of the gas to the compressor.

Abstract: A variable gear ratio hydraulic power steering device 1 is provided with a variable ratio transmission mechanism 7 for varying the rotation transmission ratio between the rotational angle of a steering handle 31 and the rotational angle of a pinion shaft 33 and a flow volume control valve 40 for controlling the discharge flow volume of an oil pump 10 which circulates operating fluid. The variable ratio transmission mechanism 7 has a lock mechanism 75. A valve controlling controller 50 for controlling the flow volume control valve 40 switches main and secondary flow volume control maps for controlling the flow volume control valve 40, in dependence on the operational state of the lock mechanism 75. Thus, a failsafe function for the variable ratio transmission mechanism 7 is given to the variable gear ratio hydraulic power steering device 1.

Abstract: In an air servo cylinder formed by integrally combining an air cylinder, servo valves, and a controller via a manifold block, there are provided, in the manifold block, air discharge flow paths for releasing, to the outside, compressed air discharged associated with operations of the servo valves. In each of the air discharge flow paths, a silencer for reducing exhaust noise is incorporated so as not to protrude from the manifold block to the outside.

Abstract: A hydraulic control system of the present invention comprising control valves for controlling the direction and flow rate of pressure oil discharged from a hydraulic pump, hydraulic actuators which the pressure oil is fed to and controlled by the control valves, the hydraulic actuators including hydraulic cylinders and a hydraulic motor, and a first return passage provided as a passage for returning return oil present at the head side of one of the hydraulic cylinders to the tank, the first return passage being in communication with the tank, and a second return passage for returning return oil from each of the other hydraulic actuators including the hydraulic motor except for the hydraulic cylinders to the tank, the second return passage having a back pressure check valve and a replenishing passage, the replenishing passage being configured so as to provide a back pressure developed by the back pressure check valve to the low pressure side of each of the other hydraulic actuators to prevent cavitations.

Abstract: A thermodynamic engine converts the superheated steam of at least one working medium into kinetic energy using a decompression device. Said engine includes a low-temperature circuit, in which a first working medium is transported through a first heat exchanger and subsequently through the decompression device and a high-temperature circuit, in which a second working medium is transported through a second heat exchanger and subsequently through the decompression device. The first heat exchanger and the second heat exchanger are located in the exhaust system of an internal combustion engine, and the internal combustion engine a coolant circuit can be used to heat the working mediums in separate collection containers.

Abstract: A master cylinder (10) for a vehicle hydraulic brake system has a housing (12) with a bore (14) formed therein, which is open at one end and in which a first pressure piston (16) and a second pressure piston (18) are guided sealingly and displaceably along an axis (A). Acting counter to an actuating direction (X) upon the first pressure piston (16) is a restrained first restoring spring (34) and upon the second pressure piston (18) a second restoring spring (52). In order, in a transportation or disassembly state of the master cylinder (10), to prevent the first pressure piston (16) from being pressed excessively out of the bore (14), the second pressure piston (18) is supported by means of a stop component (66) counter to the actuating direction (X) positively in the housing (12) of the master cylinder (10).

Abstract: In an internal combustion engine having an exhaust gas turbocharger with an exhaust gas inlet structure including two exhaust gas flow passages in communication with two exhaust ducts via a rotary cylinder valve for controlling the exhaust gas flow, the valve includes two inlet openings for directing the flow to the inlet flow passages of the turbine and a recess which when disposed over the exhaust gas flow passages permits exhaust gas to flow from one to the other of the exhaust gas ducts, the interior of the valve being in communication with a bypass line for bypassing the turbine.

Abstract: A combustion-type nail driver uses a motor for driving a fan. A motor holder formed from plastic accommodates the motor. A cylinder head has a motor holder receiving portion in which the motor holder is slidably movably disposed. A coil spring has one end secured to the motor holder and another end secured to the cylinder head to thereby support the motor holder. Initial acceleration applied to the motor when combustion occurs can be suppressed and impact imparted upon the motor can also be suppressed by friction between the outer periphery of the motor holder and the inner periphery of the motor holder receiving portion. A heat shielding plate is interposed between the lower end surface of the motor and the cylinder head in order to prevent hot air combustion gas from entering into the motor.

Abstract: An electro-water reactor steam powered electric generator system includes a steam boiler having water and steam chambers, a water intake pipe and a plurality of steam delivery pipes. An electric resistance heater is mounted under and around the boiler having power leads connected to an auxiliary power source. A plurality of independent steam turbines and connected electric generators are joined respectively to the steam delivery pipes. Most of the electric power delivery leads of the generators are adapted to deliver electric power for industrial and residential usage. At least one of the generator power leads is connected to the electric resistance heater elements. A steam return pipe connects each turbine with a condenser which includes a heat exchanger connected to the water intake pipe. Electric pumps and piping circulate water between the condenser and a body of water. An auxiliary electrical power source is connected to the heater elements.

Abstract: A method facilitates fabricating a gas turbine engine combustor. The method comprises coupling a venturi to a primary swirler, and coupling the venturi to a secondary swirler such that a gap is defined between a portion of the venturi and a portion of one of the primary swirler and the secondary swirler.

Abstract: Fuel supplied to a rotary fluid trap is centrifugally accelerated within a first cavity adjacent a first side of a rotor, and is then directed though a plurality of first passages extending through the rotor between and proximate to the blades, and shaped so as to at least partially conform to the shape of the blades. Second passages extend within the blades from the first passages and terminate within associated cavities proximate to the tips of the blades. Relatively cooler fuel in the first passages is thermosiphon exchanged for relatively hotter fuel in the second passages so as to cool the blades. The heated fuel flows into a second cavity adjacent to a second side of the rotor and is discharged from the rotating frame of reference directly into the combustion chamber through a second rotary fluid trap. A separate fuel distribution circuit is used for starting and warm-up.

Abstract: A forced air cooling system for an APU comprising at least an oil cooler, a plenum in fluid communication with the oil cooler, and a compressor rotated by a rotating shaft of the APU such that the compressor and rotating shaft rotate at a same speed, the rotating compressor inducing a cooling air flow through the oil cooler. A method for cooling an auxiliary power unit is also provided.

Abstract: A steam turbine plant partially utilizes a hydrocarbon fuel such as an LNG as a fuel to improve the efficiency of the plant. A steam turbine plant includes a boiler, a steam turbine, a feedwater system, and a superheating combustor. The boiler generates steam, and the steam turbine is driven by the steam generated in the boiler. The feedwater system recovers the steam exhausted from the steam turbine and supplies the steam to the boiler as a feedwater. The superheating combustor is provided between the boiler and the steam turbine, wherein fuel originated from hydrocarbon fuel and oxidizer are mixed with the steam generated in the boiler and combusted in the superheating combustor to increase the temperature of the steam.

Abstract: A combustor assembly includes a combustor chamber having a primary and intermediate zone that provides for reduced flame temperatures. The combustor assembly includes first and second pluralities of injectors. The first plurality of injectors introduces fuel to a primary zone. A second plurality of injectors introduces fuel to an intermediate zone. During operation between initial start up and before the introduction of engine load, fuel is introduced into the primary zone only by the first plurality of injectors. Once engine load is applied to the engine, fuel is introduced into the intermediate zone by the second plurality of injectors. Introduction of additional volume of fuel allows the fuel-air ratio to remain constant regardless of engine operating conditions. The constant fuel-air ratio is maintained at a desired rate to lower flame temperatures and reduce nitrous oxide emissions.

Abstract: A turboprop powerplant with at least a compressor having a forward compressor inlet and a shaft extending axially through the compressor and having a shaft axis, an inlet duct encircling the shaft passing therethrough, the inlet duct having an aft end in gas communication with the compressor inlet and a forward end having at least two branches each with an inlet orifice, each inlet orifice having a centroid in a radial plane through and transverse to the shaft axis, the centroids and shaft axis defining an angle less than 180°.

Abstract: An annular combustion chamber for a turbomachine comprises inner and outer annular walls united by a transverse wall, the inner and outer walls are extended at their downstream ends by inner and outer fastener flanges for fastening respectively to inner and outer shells of a turbomachine casing in order to hold the combustion chamber in position, the inner flange being provided with a plurality of holes for feeding cooling air to a high pressure turbine of the turbomachine, the air feed holes through the inner flange being distributed circumferentially over at least two rows disposed in a staggered configuration.

Abstract: An automatic powdered ice machine has an ice barrel with a chamber defined through the ice barrel. Refrigerating devices are provided at an outer periphery of the ice barrel. A milling device has a milling pole with a helical ridge extending into the ice barrel and driven by a motor to rotate. A feeding member is provided beside the milling device. When the ice barrel is cooled by the refrigerating device to ?10° C. and below, liquid is poured into the ice barrel by the feeding member and frozen. Then, the milling device is actuated and the ice is removed and powdered by the helical ridge, and pushed downwards to fall into a container under the ice barrel.

Abstract: A cryocooler having two operating modes so that its operating range is broadened, its gas bearing system is maintained in an operable state and it can utilize piston stroke modulation for energy efficiency. A piston stroke modulator modulates the piston stroke when the commanded piston stroke exceeds the minimum stroke and maintains the minimum stroke when the commanded stroke is less than the minimum stroke. A heater applies heater power to the thermal load when the commanded piston stroke is less than the minimum piston stroke. A closed loop feedback control system is used which has two branches of its dynamic leg. One branch controls the modulation of the cryocooler and the second, parallel branch controls the modulation of the heater.

Abstract: Cooling apparatus comprises a cooling system defining a closed path around which a coolant flows. The system includes a pump for causing coolant flow, a supply line extending from the pump to a cold location, positioned in a cryostat, in order to cool that location, and a return line extending from the cold location to the pump. The pump is located externally of the cryostat. A first heat exchanger is positioned within the cryostat and links the supply and return lines to allow heat exchange therebetween such that coolant flowing in the supply line is cooled by coolant flowing in the return line. A refrigerator is provided having a cooling stage within the cryostat and coupled to the supply line downstream of the first heat exchanger such that coolant reaching the first cooling stage has been precooled by the first heat exchanger.

Abstract: An air conditioner is provided. A predetermined character and/or its applied character image are/is displayed on a display window of the air conditioner. The character and/or, the character image are/is changed depending on the operational states of the air conditioner, so that the user perceives the operational state of the air conditioner more conveniently. The air conditioner has advantages in that the user can perceive the operational state of the air conditioner more conveniently, the user can be stimulated to purchase the product, and a use term of the air conditioner can be extended.

Abstract: A freezer alarm system and apparatus for monitoring the temperature in the freezer compartment of a refrigeration unit includes a housing mountable on a wall adjacent the refrigeration unit for plugging into a wall outlet. A capillary tube extends from the housing and terminates with a temperature sensor that is mounted inside the refrigeration unit for sensing when the temperature increases therein past a given temperature preset by an adjustable thermostat located on the housing. When this event occurs contacts within the housing close thereby actuating an audible buzzer and a visible luminary alarm warning the owner that the temperature within the refrigeration unit has exceeded a safe pre-set level and that the refrigeration unit needs checked for remedial action.

Abstract: A method for evaluating operation of a compression cooling system includes the steps of: (a) in no particular order: (1) measuring a first temperature of the refrigerant in a saturated state; and (2) measuring a second temperature of the refrigerant in a liquid state; and (b) calculating a difference between the first temperature and the second temperature to determine the extant amount of subcooling to which the refrigerant is subjected.

Abstract: A system for monitoring the amount of refrigerant supplied from a refrigerant tank to a plurality of refrigerant systems comprising a tank valve for connection to a refrigerant tank at a predetermined location. A rack of refrigerant rack lines is routed from the location to the refrigerant systems for connecting the tank valve and refrigerant to the refrigerant systems. Rack valves are disposed in the refrigerant rack lines for controlling the flow of refrigerant through the rack lines to a selected refrigerant system. A sensor for determining the amount of refrigerant supplied from the refrigerant tank to a refrigerant system and recording the supplied amount of refrigerant. The system controller controls the rack valves and tank valve to selectively connect the supply of refrigerant in the refrigerating tank with a selected refrigerant system so that the amount of refrigerant delivered to the refrigerant system is recorded by the system controller.

Abstract: An improved anti-sweat heater control system is disclosed for reducing and/or eliminating sweat on cooled surfaces of a refrigerated container. A method for reducing or eliminating sweat from forming on cooled surfaces of a refrigerated container is also disclosed. A refrigerated container incorporating the anti-sweat heater control is also disclosed.

Abstract: An air-conditioning control unit (26) controls the airflow distributing door (16), a first indoor heat exchanger (10) is provided in the first air passage (21) and a second indoor heat exchanger (4) is provided in the second air passage (22). in adjusting air sent from the first air passage (21) is distributed into the second air passage (22) and the third air passage (23) by controlling the airflow distributing door (16). In switching from the cooling operation state to the heating operation state, the flow of the adjusting air in the second air passage (22) is increased by controlling the airflow distributing door (16) by the air-conditioning control unit (26) prior to the switching of refrigerant circuit from the cooling control mode to the heating control mode.

Abstract: An energy management system may include a refrigeration apparatus such as may be used to form an ice rink. Heat rejected from that apparatus may be used to address heating loads elsewhere. The apparatus may include a thermal storage apparatus, such as may be charged with ice, or another phase change material. The refrigeration apparatus may then be run for the purpose of obtaining the rejected heat, with the cooling of the thermal storage material as a by-product of operation to obtain extra rejected heat. The cold reservoir then developed in the thermal storage material may be used subsequently to provide cooling to a different load, at a different time of day. The thermal storage element may be used to provide cooling to a condensor of the refrigeration apparatus, or may be placed in series with a cooling load, such as an ice sheet or refrigerated enclosure. The apparatus may be electronically controlled, may used ammonia as an operating fluid in a vapour cycle system.

Abstract: Disclosed is a built-in refrigerator provided in a sink and effectively discharging heat from a condenser and a compressor. The built-in refrigerator includes a cabinet provided in the sink and a component chamber at a rear bottom thereof and a dust guard provided at a front bottom of the cabinet; a compressor provided in the component chamber; a condenser provided under a bottom surface of the cabinet; a ventilating passage communicating the component chamber with a bottom of the cabinet and outside of the dust guard for discharging heat generated from the condenser and the compressor to outside; and a cooling fan provided in the component chamber for cooling the compressor and the condenser.

Abstract: Disclosed is a built-in refrigerator provided in a sink and effectively discharging heat from a condenser and a compressor. The built-in refrigerator includes a cabinet provided in the sink and a component chamber at a rear bottom thereof and a dust guard provided at a front bottom of the cabinet; a compressor provided in the component chamber; a condenser provided under a bottom surface of the cabinet; a ventilating passage communicating the component chamber with a bottom of the cabinet and outside of the dust guard for discharging heat generated from the condenser and the compressor to outside; and a cooling fan provided in the component chamber for cooling the compressor and the condenser.

Abstract: The invention relates to a water tank arrangement (4), particularly for a heater or air conditioner of a motor vehicle, comprising a water tank (3) which is disposed in or on a housing (2). Said water tank (3) is embodied so as to be integrated into the housing (2).

Abstract: Cooling apparatus comprises a vacuum chamber, an inner chamber positioned within the vacuum chamber adapted to contain a coolant for cooling target apparatus, and a mechanical refrigerator for refrigerating the coolant and having at least one cooled part in contact with the coolant. The mechanical refrigerator is coupled to one or each of the vacuum chamber and inner chamber through vibration-reducing couplings, so as to reduce the effect upon the target apparatus of vibrations from the mechanical refrigerator.

Abstract: Cabinet for a refrigeration compressor delimiting an inner space designed to receive electrical and electronic components, characterized by having at least one support for the electrical and electronic components and a protective cap having an open side face delimited by an edge whose shape at least partially matches the shape of the side wall of compressor, cap being intended to be applied by its open side face against the side wall of the compressor, thus forming one of the walls of the cabinet. The cabinet accommodates the electrical and electronic command, control, and protection components on refrigeration compressors ensuring that the electrical and electronic components are held at their operating temperature and that tightness and vibrations are at an acceptable level.

Abstract: A method of regulating the refrigerant temperature for a beverage machine, including a refrigeration system for producing a frozen beverage, operating at least one compressor at a speed to flow the refrigerant through the refrigeration system of the beverage machine and cooling the refrigerant with at least one condenser. The method may also include controllably varying the flow of air across the at least one condenser or the speed of the at least one compressor.

Abstract: The present invention relates to a refrigerator. The present invention is configured such that an ice maker (50), a dispenser (60) and the other related components are installed to a refrigerator door 40 that opens and closes a storage space (33) of a main body (32) of the refrigerator, of which walls are formed of insulating layers (31). A water supply tube (80) is provided in the door (40) to pass through a lower hinge (47) and extend through the door so that water can be supplied to a filter (70) in a filter chamber (71) defined within the door (40). The water purified in the filter (70) is supplied through a valve (75) to the ice maker (50) and dispenser (60). The filter chamber (71) is configured to be opened and closed by a service door (72) so that a user can more easily exchange the filter (70). The service door (72) is provided in front of the door (40).

Abstract: An air distribution system for combined refrigerators of the type that comprises: a freezing compartment (10) and a refrigerating compartment (20); an air-cooling compartment (40) lodging at least one evaporator (45); a distributing duct (60) having a rear window (62) opened to the air-cooling compartment (40), at least one front opening (65) communicating with the freezing compartment (10) and one end opening (64) maintained in communication with the refrigerating compartment (20); and at least one fan (46, 47) producing a forced airflow from the air-cooling compartment (40) to the freezing compartment (10) and to the refrigerating compartment (20), said distributing duct (60) carrying a conduct (63), having a first end coupled to the end opening (64) of the distributing duct (60), and a second end selectively placed in fluid communication with one of the parts defined by the distributing duct (60) and by the air-cooling compartment (40).

Abstract: A refrigeration delivery system for use with portable food storage systems having an L-shaped body with a hollow vertical tower portion and a hollow horizontal flat lower portion. The internal volume of the body is suitable for the storage of ice and a combination of ice and melt water. In one embodiment, a hand-powered pump and spout is provide through a top of the tower portion to pump chilled water for drinking or to remove it from the delivery system. A second embodiment incorporates a flexible straw arrangement through a top of the tower portion. A third embodiment incorporates both a hand-powered pump and spout as well as a flexible straw arrangement through a top of the tower portion.

Abstract: The set of combined bottles with hidden cooler is designed to allow to store and cool two different types of beverages at once. The set contains two interlocked together bottles with handles and a cooling liner. The bottles interlock together by the use of straps. The hidden cooler keeps the beverages in bottles cool for continuous time. The cooler is made from safe for usage material. It is cored and filled with water. This invention allows continuing cooling of the beverages without interfering with the overall look of the bottles.

Abstract: Device for distributing suction gas for a parallel compressor installation, said installation having at least two refrigeration compressors, at least one oil level equalization tube providing a communication between the oil pans provided in the bodies of the compressors, at least one suction gas distribution device comprising an essentially straight distribution tube, and branch tubes. The branch tubes have at least one portion forming an angle of between 55° and 65° with the axis of the distribution tube. The present invention uses a special geometry for equalizing the pressures in the oil pans of each compressor and thus using simple equalization channels.

Abstract: In accordance with one preferred embodiment, a desiccant cartridge (30) for insertion into an integrated condenser/receiver (10) comprises a rigid stand-off member (72) and a porous desiccant bag (34). The preferred rigid stand-off member comprises spaced inner and outer pad portions and an elongated stand-off portion terminating in the inner pad portion. The inner pad may include a tab portion. The porous desiccant bag is positioned between the inner and outer pad portions and affixed to one or both of the inner and outer pad portions. A rigid cap with a plurality of holes may be provided to which a second end of the porous desiccant bag may be attached. The porous desiccant bag includes first and second flat end seals, one of which is secured to attachment tab portions.

Abstract: The invention relates to a refrigerant circuit comprising at least one heat absorption element and at least one heat dissipation element. According to the invention, heat transfer elements carrying out the same function can be operational in the refrigerant circuit at different pressure levels of the refrigerant A refrigerating system provided with the inventive refrigerant circuit is also disclosed.

Abstract: The invention relates to a heat exchanger, especially for motor vehicles, comprising a soldered heat exchanger network made of flat pipes (2, 3) and corrugated ribs (1). A liquid and/or vaporous-type medium can flow through the flat tubes (2, 3) and air can circulate around the corrugated ribs. One corrugated rib respectively comprises two surfaces (4, 5) which are arranged in an essentially parallel manner in relation to each other and which are connected respectively by an arch-shaped piece (6) which is soldered to a flat pipe, said arch-shaped piece comprising three sections (6a, 6b, 6c) which have different curvatures.