Abstract: A method of manufacturing a temperature sensor unit comprising the steps of: providing the conductors in the sheath such that in a first zone a space is defined between the sheath and the conductors; providing the second insulating material in liquid form in the space; positioning the sensors in the space such that the conductors are provided closer to the centre of the sheath than the sensors; and soldering and/or welding the set of conductors to the set of terminals. A temperature sensor in which sets of conductors and one or more temperature sensors are arranged inside a sheath and with respect to each other such that the conductors are provided closer to the centre of the sheath than the temperature sensors.

Abstract: The invention relates to a method (19) for starting an electric single-phase induction motor (1), wherein during a start-up interval of the start-up cycle for starting said electric motor (1), the frequency (fref) of the electric current for driving said electric motor (1) is set to a first frequency (fstart), and later to the operating frequency (frun) of the electric motor (1), wherein the first frequency (fstart) is higher than the operating frequency (frun).

Abstract: This refrigeration compressor includes a plurality of compression units, each compression unit having a cylinder head including a refrigerant suction chamber and a refrigerant discharge chamber, a refrigerant distribution device having a distribution pipe and bypass pipes putting the distribution and the suction chambers of the compression units in communication, and a refrigerant discharge device having a discharge pipe and bypass pipes putting the discharge pipe and the discharge chambers of the compression units in communication. The compressor also includes a pressure equilibration means arranged to put the suction chambers of at least two compression units and/or the discharge chambers of at least two compression units in communication.

Abstract: Disclosed is a heat exchanger of a plate type comprising an evaporator having at least one inlet and at least one outlet allowing a first medium to enter into and exit from the evaporator. The evaporator comprises a plurality of interconnected evaporation chambers disposed in parallel, having at least one common inlet and at least one common outlet allowing the first medium to enter into and exit from the evaporation chambers.

Abstract: A method and a device for detecting an abnormality of a heat exchanger exchanging heat between a first fluid flow flowing in a conduit and a second fluid flow flowing along a flow path, said conduit and said flow path each having an inlet and an outlet, whereby the method comprises the steps of establishing at least one parameter representative of the temperature conditions of the heat exchanger, establishing a second fluid inlet temperature, establishing a parameter indicative of expected heat exchange between the heat exchanger and the second fluid, processing the heat exchanger temperature, the second fluid temperature and the parameter indicative of expected heat exchange for establishing an estimated second fluid outlet temperature, and employing the estimated second fluid outlet temperature for evaluating the heat exchange between the first and second fluids by comparing the estimated second fluid outlet temperature, or a parameter derived therefrom, with a reference value.

Abstract: The separating device according to the invention comprises a body delimiting a separating chamber, at least one inlet orifice emerging in the separating chamber and intended to be connected to a discharge orifice of the refrigerant compressor so as to allow a lubricant-refrigerating gas mixture to be introduced into the separating chamber, at least one lubricant outlet orifice emerging in the separating chamber and intended to be connected to a lubricant pan formed in the refrigerant compressor. The separating device comprises a first measuring means arranged to measure the temperature of the lubricant contained in the lubricant pan formed in the refrigerant compressor, and a regulating arranged to regulate the temperature of the lubricant separated in the separating chamber as a function of the temperature of the lubricant measured by said first measuring means.

Abstract: A bent axis hydromodule that has a yoke that is rotatable about trunnions and rotating kits having rotating kit shafts that are in fluid communication with the yoke. Servo piston porting is integrated within the yoke and positioned about the trunnion such that servo pistons are in fluid communication with the servo piston porting and operable to rotate the yoke about a trunnion axis.

Abstract: A sealed compressor is provided with a spray lubricant that will provide lubricant at various bearing surfaces during initial start-up of the compressor. The lubricant will wear away quickly after initial run-in, but liquid lubricant will be provided by that time.

Abstract: This compressor comprises first and second volutes describing an orbital relative movement and each comprising a plate from which a spiral extends, the two spirals being engaged one inside the other and defining pairs of compression chambers of variable volume. The compressor has a housing formed in that surface of the plate of the first volute which is turned towards the spirals, which opens into one of the compression chambers, refrigerant delivery means leading into the housing, and a nonreturn device being mounted in the housing, the nonreturn device preventing communication between the delivery means and the compression chamber into which the housing opens in a first or closed position, and allowing communication between the delivery means and said compression chamber in a second or open position.

Abstract: An expansion valve (1) comprising an inlet opening and at least two outlet openings (5) is disclosed. The inlet opening is adapted to receive fluid medium in a liquid state, and the outlet openings (5) are adapted to deliver fluid medium in an at least partly gaseous state. The expansion valve (1) further comprises a diaphragm (6), and at least two valve seats (4), each valve seat (4) being fluidly connected to one of the outlet openings (5). Each of the valve seats (4) forms a valve in combination with the diaphragm (6), the position of the diaphragm (6) thereby simultaneously defining an opening degree of each of the valves. A well defined distribution of fluid flow towards each of the outlet openings (5) is easily defined by movements of the diaphragm (6). The distribution takes place before or during expansion of the fluid medium. The expansion valve (1) may be arranged in an refrigerant path of a refrigeration system.

Abstract: There is provided a circulation line (39) for circulating pressurized oil from an accumulator (11) into a housing (15) of a steering valve (14). An orifice joint (41) is provided along the path of the circulation line (39). The orifice joint (41) is removably mounted on the housing (15) of the steering valve (14) from outside. An orifice portion (42) of the orifice joint (41) applies a throttling function to the circulating oil liquid whereby a frictional heat is generated therein. The oil liquid in a warm state flows through a communication passage (21), passages in a spool valve (16), and a low pressure side passage (18B), thus enabling the steering valve (14) to be always in a warm state.

Abstract: The invention provides a valve comprising a tube for guiding movement of a plunger, a solenoid which can be arranged about the tube, and a yoke which can be positioned in an operational position relative to the tube and relative to the solenoid so that it provides a magnetic path between the solenoid and portions of the tube. The yoke engages the tube and thereby prevents removal of the solenoid from tube. The invention thereby provides a very simple valve design with a low amount of components. The invention further provides a method of making a valve including fixing a solenoid to a tube by use of a yoke which engages the tube.

Abstract: The present invention relates to a method and a system to reduce losses of energy due to ripples, especially at the power grid, the ripples being short term power shortages or excess power. The method is based on the idea of shutting off energy consuming devices during a period of power shortage, if their operation is not necessary, and optionally to turn on such energy consuming devices during periods of excess power, if energy may be stored in them, especially when energy may be stored as some physical parameter or variable, being a part of the operation of the energy consuming devices, such as the temperature of a freezer.

Abstract: The invention provides a servo valve with a main piston and a servo piston. The servo piston controls a pressure in a servo chamber and thereby controls movement of the main piston based on a pressure difference between two chambers of the valve. To facilitate opening of the valve by relatively small pressures even in high pressure systems, the servo chamber according to the invention is provided inside the armature.

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: A hydraulic generator drive system. The drive system has a control system that utilizes a first loop control that receives a signal associated with hydraulic pump or motor output and sends a command signal to a pump controller in order to control the hydraulic pump. Simultaneously, the control system has a second loop control that receives an input signal from the generator and sends a command signal to an armature to actuate the generator. As a result, a single control system is provided to control the speed and voltage output of the generator.

Abstract: The invention concerns a hydraulic steering with a steering initiator, a steering unit with feedback properties, which can be activated by the steering initiator, the steering unit having a supply connection arrangement with a pressure connection (P) and a tank connection (T) and a working connection arrangement with two working connections (L, R), an auxiliary-force operated steering valve, which is located in parallel with the steering unit between the supply connection arrangement (P, T) and the working connection arrangement (L, R), and a feedback suppressing device, which is active, when the steering valve is active. It is endeavored to find a simple manner of ensuring the priority of the steering initiator over the steering valve. For this purpose, the steering initiator interacts with an activation sensor, which deactivates the feedback suppressing device on an activation of the steering initiator.

Abstract: Compressor has a fixed scroll and a scroll movable in an orbit relative to the fixed scroll. The fixed and movable scrolls are equipped with a spiral wrap that engage each other and delimit variable-volume compression chambers. The spiral wrap of the movable scroll has a stepped portion extending over at least a portion of its length. At least one of the scrolls defines a passage for communication, during orbital movement of the movable scroll, between two compression chambers, with the ends of the passage terminating respectively on either side of the outer and inner walls of the spiral wrap of the scroll with the passage or inside the outer and inner walls of the spiral wrap of the scroll with the passage. The passage has a check valve for allowing fluid to flow only from the outer wall of the spiral wrap of the scroll with the passage to the inner wall.

Abstract: This refrigerating compressor comprises a sealed chamber delimiting a suction volume and a compression volume arranged respectively either side of a body contained in the chamber, and an oil injection circuit arranged to inject oil into the compression volume. The oil injection circuit comprises a moving blocking piece, operated by a centrifugal force, between a first position enabling oil injection into the compression volume and a second position preventing or limiting oil injection into the compression volume, the blocking piece being arranged to be displaced into its second position when the speed of the compressor exceeds a predetermined value.

Abstract: A method of analysing a refrigeration system (1) comprising at least one compressor (4), at least one condenser (5) and at least two refrigeration entities (2), each comprising at least one evaporator (9). Based on information relating to the gas production by the evaporators (9) it is determined whether or not two or more evaporators (9) are running in a synchronized manner, i.e. are switching between an active and an inactive state at least substantially simultaneously. In case two or more evaporators (9) are running in a synchronized manner, the refrigeration system (1) may be controlled in order to desynchronize the evaporators (9). This may, e.g., be done by changing a cut-in temperature and/or a cut-out temperature for one of the corresponding refrigeration entities (2). Synchronization causes undesired variations in the suction pressure, and preventing synchronization therefore results in a more appropriate control of the refrigeration system (1). Reduces wear on the compressors (4).