Abstract: A scroll-type refrigerant compressor with a sealed enclosure defined by a shell and containing a suction volume and a compression volume at opposite ends of the enclosure. The shell has a gas inlet, an electric motor on the suction side having a stator and defining with the shell an annular volume. The stator is surrounded by a jacket defining an annular volume with the shell and a chamber which contains the motor winding and is directed towards the compression volume, an end of the intermediate jacket directed away from the compression volume being located at an end of the stator directed away from the compression volume. Structure is provided for conveying some of the gas arriving at the gas inlet into the chamber containing the motor winding, and gas conveyed by the structure is admitted into the chamber containing the winding through the gas intake orifice.

Abstract: A compressor comprising a sealed chamber delimited laterally by a shell, a drive shaft housed in the shell and guided relative to the other parts of the compressor via at least one bearing provided in a bearing support fixed to the internal wall of the shell. The method comprises steps consisting in supplying a shell have, in the fixing plane of the bearing support, an oval section comprising a small axis to which the bearing support is intended to be mounted, exerting a pressure on the shell in order to elastically deform it so as to increase the length of its small axis, inserting and positioning the bearing support in the fixing plane of the latter, and ceasing to exert a pressure on the shell so that the latter tends to elastically return to its original form and grip the bearing support.

Abstract: A fire protection system and method for providing a fire protection for a cooking unit (1) comprising a vessel (2) containing liquid fat or grease. The fire protection system comprises a fire suppressant source with water based fire suppressant, preferably essentially pure water. The fire protection system further comprises at least one pipe (4) being fluidly connected to the fire suppressant source in such a manner that fire suppressant from the fire suppressant source may be supplied to the pipe(s) (4). At least one pipe (4) is arranged above the vessel (2) and extending along a direction defined by a first rim (5) of the vessel (2), said pipe(s) (4) comprising a first set of nozzles (6a) directed towards the first rim (5) of the vessel (2), and a second set of nozzles (6b) directed towards a second rim (7) of the vessel (2), said second rim (7) being arranged opposite the first rim (5).

Abstract: The invention concerns a brake valve arrangement of a vehicle having a trailer coupling and at least one controllable hydraulic consumer, with a brake valve (27). It is endeavored to provide a similar embodiment of a vehicle with such a brake valve arrangement. For this purpose, the brake valve (27) is combined with at least one control valve (11, 12) controlling the hydraulic consumer into forming a valve block (10) having several valve modules.

Abstract: The compressor includes a sealed housing defining a suction volume and a compression volume respectively provided on either side of a body contained in the housing, an oil injection circuit supplied with oil from an oil contained in a casing and adapted for injecting oil into the compression volume, the oil injection circuit comprising an electrovalve including a body attached to the wall of the sealed housing and a core movable under the action of a magnetic fluid between a closing position for injecting oil into the compression volume and an opening position preventing or limiting the injection of oil into the compression volume. The compressor includes a control means for moving the core of the electrovalve between the opening and closing positions based on the compressor speed and/or on the cooling gas discharge temperature.

Abstract: The invention concerns a refrigerant compressor (1), particularly a semi-hermetic refrigerant compressor, with a housing (2), having in its bottom part (3) an oil sump (4), a compressor block (5) having at least one cylinder (6), in which a piston (7) is arranged, a crankshaft (11), which is supported in the compressor block (5) and in driving connection with the piston (7), and an oil pump arrangement (27), which is at least partly submerged in the oil sump. Also with varying speeds, good oil lubrication must be ensured. For this purpose, the crankshaft (11) has at its lower end a diameter extension (19), through which an oil channel (35) extends eccentrically to the crankshaft axis (36), said channel (35) connecting the oil pump arrangement (27) to a closed oil pressure chamber (21) between the crankshaft (11) and the compressor block (5), said chamber (21) being connected to the inside (37) of the housing (2) via a vent path (40, 41).

Abstract: The invention concerns a hydraulic steering arrangement (1) with a supply connection arrangement (P, T), a working connection arrangement (A, B) connectable to a steering motor (5), a steering unit (6) located between the supply connection arrangement (P, T) and the working connection arrangement (A, B), and a steering valve (14) whose outlet is connected to the working connection arrangement (A, B). It is endeavoured to keep the load of such a steering arrangement small. For this purpose, the steering unit (6) is made as an open-center steering unit, an inlet (20) of the steering valve (14) being connected to a pressure supply arrangement (22) that can be activated by an activation of the steering valve (14).

Abstract: The invention concerns a refrigerant compressor (1), in particular a semi-hermetic refrigerant compressor, with a compressor block (5) comprising several cylinders arranged in a star shape, a motor, whose rotor is unrotatably connected to a crankshaft (11) that comprises a crank pin (22) and is supported in a bearing (13) in the compressor block (5), and a piston in each cylinder, each piston being connected via a connecting rod (23) to the crank pin (22), the connecting rod (23) comprising a bearing pad (24) that rests on the crank pin (22), the bearing pads (24) of all connecting rods (23) being held on the crank pin (22) by means of a ring arrangement (25). It is endeavoured to keep the load on the crankshaft small. For this purpose, each connecting rod (23) has a power application point (49) at the crank pin (22), which is displaced in the direction of the bearing (13) in relation to the axial centre of the crank pin (22).

Abstract: The invention concerns a method of mounting a cylinder arrangement of a hermetically enclosed refrigerant compressor arrangement in a carrier arrangement (14, 15), in which the cylinder arrangement is inserted in the carrier arrangement (14, 15), aligned in relation to a crank shaft (5) and connected to the carrier arrangement (14, 15). It is endeavoured to ensure a good efficiency of the refrigerant compressor arrangement. For this purpose the carrier arrangement is deformed, before inserting the cylinder arrangement, by means of a calibration cylinder (40), until the calibration cylinder (40) has a predetermined alignment, after which the calibration cylinder (40) is removed and replaced by the cylinder arrangement in the carrier arrangement (14, 15).

Abstract: A hydraulic actuator for a hydraulic servomotor 4 is disclosed. The hydraulic servomotor 4 has a first chamber 5 and a second chamber 6 associated therewith. The hydraulic actuator is connected to a fluid source 2 and a fluid drain 3, and it comprises a valve assembly arranged between the fluid source 2 and the fluid drain 3 to control fluid pressures in the chambers 5, 6. At least one auxiliary valve 11 is fluidly connected between the valve assembly and the fluid drain 3, said auxiliary valve(s) 11 being of a kind which is normally closed in a de-energized state. In the case of a power cut off the auxiliary valve(s) 11 will close, thereby preventing fluid flow from the valve assembly towards the fluid drain 3. This causes a servomotor piston member 12 to be hydraulically locked in its instantaneous position, thereby locking the hydraulic servomotor 4. The valve assembly may be designed without taking the locking function into consideration.

Abstract: A roller vane pump that uses slippers on its rollers to create multiple seals. The roller vane pump has a fixed cam ring that has a rotor within. The rotor has openings that receive rollers that rotate about the inside of the cam ring. Each roller has a slipper rotatably connected thereto. The use of the slipper allows multiple seals to be created between the slipper, the rollers, and the cam ring and additionally allows for the roller vane pump to rotate clockwise or counterclockwise without the changing of parts.

Abstract: The invention concerns a refrigerant compressor arrangement with a compressor having a suction inlet, a casing, in which the compressor is located, a suction socket, which is in communication with the casing, a suction opening in the casing, which is connected with the suction socket, and a telescopic pipe, which is located between the suction inlet and the suction opening in the casing. It is endeavored to manufacture a refrigerant compressor arrangement in a cost-effective manner. For this purpose, the suction opening is surrounded by a drawing through in the casing wall, whose inner wall forms a sliding surface for the telescopic pipe.

Abstract: The present invention provides a pumping system for moving water of a swimming pool, including a water pump and a variable speed motor. In one example, a target volume amount of water and an operational time period is provided, and the operational time period is altered based upon a volume of water moved. In another example, operation of the motor is altered based upon the volume of water moved. In addition or alternatively, a target flow rate of water to be moved by the water pump is determined based upon the target volume amount and a time period. In addition or alternatively, a plurality of operations are performed on the water, and a total volume of water moved by the pump is determined. In addition or alternatively, an optimized flow rate value is determined based upon power consumption.

Abstract: The invention concerns a method for detecting changes in a first flow of a heating or cooling medium in a refrigeration system whereby the first flow is conveyed through a heat exchanger wherein occurs heat transfer from the first flow to a second flow of a heating or cooling medium. The earliest possible detection of the changes is desired. For this it is provided that for the supervision of the first media flow moving through the heat exchanger a change in the enthalpy of the second media stream or a value derived therefrom is determined.

Abstract: A method and a device for detecting flash gas in a vapor-compression refrigeration or heat pump system comprising a compressor, a condenser, an expansion device, and an evaporator interconnected by conduits providing a flow path for a refrigerant, by determining a first rate of heat flow of a heat exchange fluid flow across a heat exchanger of the system and a second rate of heat flow of the refrigerant across the heat exchanger, and using the rates of heat flow for establishing an energy balance from which a parameter for monitoring the refrigerant flow is derived, to thereby provide early detection of flash gas with a minimum number of false alarms.

Abstract: A control system for a hydraulic servomotor (13) is disclosed. The control system comprises an electro hydraulic actuator (2) comprising a number of valves (9, 10, 11, 12, 18) for controlling fluid flows, a main control module (1), and one or more connectors. The control system further comprises at least one extension control module (3) comprising one or more connectors. Finally, the control system comprises means (6) for communicating signals between the main control module (1) and each of the extension control module(s) (3). Since the main control module (1) and the extension control module(s) (3) are able to communicate signals, it is possible to provide signals to/from the main control module (1) via an extension module (3), thereby in effect providing additional connectors to the main control module (1). Thereby the main control module (1) may be able to perform additional functions as compared to similar prior art control modules.