Abstract: An expansion valve (1) is described to include a housing (2) having in inlet port (3) and an outlet port (4), a valve seat (5) arranged between the inlet port (3) and the outlet port (4), a valve element (6) movable over an operating stroke between a closed position at the valve seat (5) and an opened position away from the valve seat (5), and an actuator (7), wherein the actuator (7) has an electric rotary motor (8) acting on the valve element (5) by means of a threaded spindle (10) and a nut (9), wherein one of spindle (10) and nut (9) is rotatably driven by the motor (8) and the other one is rotatably fixed. Such an expansion valve should have the possibility for a simple assembly. To this end, in a disassembled condition of housing (2) and actuator (7), the actuator (7) has a mounting stroke which is at least two times the operating stroke, wherein the mounting stoke extends the operating stroke.

Abstract: A flow control valve (1) for a refrigeration system is disclosed. The valve (1) comprises a valve port (14) having a substantially cylindrical inner circumference arranged to receive a protruding portion of a valve member (5). The valve member (5) comprises a protruding portion having a substantially cylindrical outer circumference corresponding to the inner circumference of the valve port (14), said protruding portion also having at least one fluted part (16), said at least one fluted part (16) defining fluid passage along the at least one fluted part (16) when the valve member (5) is in the open position. The valve member (5) is provided with at least one first fluid passage (6) extending through the valve member (5) between a second valve chamber (15) and a pressure balancing chamber (8), and at least one second fluid passage (7) establishing a fluid connection between a first valve chamber (12) and the first fluid passage (6).

Abstract: An expansion valve having an inlet opening, at least one outlet opening and first and second valve parts. The inlet opening is adapted to receive fluid medium in a liquid state. The outlet opening(s) is/are adapted to deliver fluid medium in an at least partly gaseous state to a flow path. The valve parts are arranged movable relative to each other such that the mutual position of the valve parts determines a fluid flow between the inlet opening and the outlet opening(s). During normal operation, a resulting force acts upon the first valve part and/or the second valve part to press the first and second valve parts towards each other. The expansion valve having ability for reducing the resulting force acting upon the valve part(s). Thereby the valve parts can easier be moved relative to each other, and the force required in order to operate the valve is thereby reduced.

Abstract: A flow control valve (1) for a refrigeration system is disclosed. The valve (1) comprises a valve port (14) having a substantially cylindrical inner circumference arranged to receive a protruding portion of a valve member (5). The valve member (5) comprises a protruding portion having a substantially cylindrical outer circumference corresponding to the inner circumference of the valve port (14), said protruding portion also having at least one fluted part (16), said at least one fluted part (16) defining fluid passage along the at least one fluted part (16) when the valve member (5) is in the open position. The valve member (5) is provided with at least one first fluid passage (6) extending through the valve member (5) between a second valve chamber (15) and a pressure balancing chamber (8), and at least one second fluid passage (7) establishing a fluid connection between a first valve chamber (12) and the first fluid passage (6).

Abstract: A refrigeration system including a refrigerant circuit with a plurality of evaporator paths and a distributor (5) for distributing refrigerants to the evaporator paths. The distributor including a controllable valve (14) for each evaporator path. The refrigeration system can be operated by using a distributor (5), which includes a housing (11) and a rotor rotatably mounted in the housing (11) and at least one radially oriented projection (15) on the circumference of the rotor, which interacts respectively with a valve element of a valve.

Abstract: A refrigeration system includes a refrigerant circuit with a plurality of evaporator paths and a distributor for distributing refrigerant. The distributor includes a housing and a controllable valve for each evaporator path. The refrigeration system is operated by using a distributor including a magnet arrangement for controlling the valves.

Abstract: The invention provides a valve comprising a house and a drum rotatable in the house. The house comprises a plurality of substantial identical tubular mid-section house members, a bottom house member, and a top house member. When connecting the house members to each other, a continuous outer wall surrounding a house cavity, a port, and a plurality of nozzles being in fluid communication with the house cavity is provided. The drum comprises a plurality of substantial identical tubular mid-section drum members, a bottom drum member, and a top drum member. When connecting the drum members to each other, an inner wall having an outer surface being adapted for rotation in contact with a corresponding inner surface of the outer wall, the inner wall comprising a plurality of conduits is provided. During rotation of the drum, the conduits can be brought into and out off fluid communication with the nozzles in order to provide passages between the port and the nozzles.

Abstract: A method to manufacture a valve using metal injection moulding is disclosed. The valve housing comprises a welding cap for welding the upper part of the valve to the valve housing. The welding cap is placed so the upper part can be welding to the housing without damaging the inner cavity of the housing. There is a gab between the welding cap and the inner liner so the heat from the welding to not damage the inner liner allowing the inner parts of the valve to move freely.

Abstract: An expansion valve (1) is disclosed which comprises an inlet opening (2), at least one outlet opening (3) and first and second valve parts. The inlet opening (2) is adapted to receive fluid medium in a liquid state. The outlet opening(s) (3) is/are adapted to deliver fluid medium in an at least partly gaseous state to a flow path. The valve parts are arranged movable relative to each other in such a manner that the mutual position of the first valve part and the second valve part determines a fluid flow between the inlet opening (2) and the outlet opening(s) (3). During normal operation, a resulting force acts upon the first valve part and/or the second valve part to press the first and second valve parts towards each other. The expansion valve (1) comprises means for reducing the resulting force acting upon the valve part(s). Thereby the valve parts can easier be moved relative to each other, and the force required in order to operate the valve (1) is thereby reduced.

Abstract: The present invention relates to a valve actuator comprising a support member for supporting a rotatable positioning element operatively connected to a valve rod. The valve actuator further comprises a track follower adapted to follow at least part of a track provided in the positioning element. The track follower is biased against at least part of the track by a resilient member. The rotatable positioning element comprises a curved outer portion arranged in an associated bearing formed in the support member.

Abstract: The present invention relates to a valve actuator comprising a support member for supporting a rotatable positioning element operatively connected to a valve rod. The valve actuator further comprises a track follower adapted to follow at least part of a track provided in the positioning element. The track follower is biased against at least part of the track by a resilient member. The rotatable positioning element comprises a curved outer portion arranged in an associated bearing formed in the support member.

Abstract: The invention provides a solenoid actuated valve with a plunger which moves in a sleeve under influence of a magnetic field from the solenoid and further comprising a damping device for reducing noise and wear caused by the plunger when it bounces against a top part located in the sleeve. The damping device comprises a first part which forms the limit of the travel of the plunger and another part which is allowed to move relative to the first part in a dampened movement. To enable application in a vacuum system, the damping device comprises a conduit which allows evacuation of a chamber confined between one end of the sleeve and the damping device. The invention further provides a damper for a solenoid actuated valve.

Abstract: The invention relates to a refrigeration system comprising a refrigerant circuit provided with a plurality of evaporator paths and a distributor (5) for distributing refrigerants to the evaporator paths, said distributor comprising a controllable valve (14) for each evaporator path. The aim of the invention is to enable the refrigeration system to be operated as desired using simple means. To this end, the distributor (5) comprises a housing (11) and a rotor which is rotatably mounted in the housing (11) and comprises at least one radially oriented projection (15) on the circumference thereof, which interacts respectively with a valve element of a valve.

Abstract: The invention provides a valve comprising a house and a drum rotatable in the house. The house comprises a plurality of substantial identical tubular mid-section house members, a bottom house member, and a top house member. When connecting the house members to each other, a continuous outer wall surrounding a house cavity, a port, and a plurality of nozzles being in fluid communication with the house cavity is provided. The drum comprises a plurality of substantial identical tubular mid-section drum members, a bottom drum member, and a top drum member. When connecting the drum members to each other, an inner wall having an outer surface being adapted for rotation in contact with a corresponding inner surface of the outer wall, the inner wall comprising a plurality of conduits is provided. During rotation of the drum, the conduits can be brought into and out off fluid communication with the nozzles in order to provide passages between the port and the nozzles.

Abstract: The invention relates to a refrigeration system having a refrigerant circuit which comprises a plurality of evaporator paths and a distributor distributing refrigerant, wherein the distributor comprises a housing and a controllable valve for each evaporator path. The intent is to achieve a predetermined mode of operation of the refrigeration system by simple means. To this end, it is provided that the distributor comprises a magnet arrangement controlling the valves.

Abstract: The invention provides a servo valve which is operable in vacuum systems and can be switched between an open and a closed state even by use of low forces. For that purpose, the valve has a closure member (4) moving between the open and a closed position under influence of a difference between a control pressure of a control chamber (13) and the pressures of the intake (2) and outlet (3), respectively. The control chamber is in constant fluid communication with the intake, and in adjustable fluid communication with the outlet to influence the control pressure mainly by the intake pressure and the outlet pressure depending on the adjustable fluid communication. The invention further provides a vacuum system with such a servo valve.

Abstract: The invention provides a solenoid actuated valve with a plunger which moves in a sleeve under influence of a magnetic field from the solenoid and further comprising a damping device for reducing noise and wear caused by the plunger when it bounces against a top part located in the sleeve. The damping device comprises a first part which forms the limit of the travel of the plunger and another part which is allowed to move relative to the first part in a dampened movement. To enable application in a vacuum system, the damping device comprises a conduit which allows evacuation of a chamber confined between one end of the sleeve and the damping device. The invention further provides a damper for a solenoid actuated valve.