Abstract: The present invention relates to a check valve unit (1, 100, 200, 300, 400) having a shaft bearing body (10, 110, 210, 310, 410) with an at least substantially cylindrical mounting portion (11) extending along an axial direction (A) and an axially extending valve shaft (20, 120) mounted therein. The latter is displaceable along the axial direction (A). The check valve unit (1, 100, 200, 300, 400) further includes a valve head (25, 125) with a sealing surface (33, 133), wherein the valve head (25, 125) is disposed on a distal end (21) of the valve shaft (20, 120) in the axial direction (A), the distal end (21) facing away from the mounting portion (11). Further, a damping reservoir (50) is provided inside the shaft bearing body (10, 110, 210, 310, 410). A volume of the damping reservoir (50) is changed by axial movement of the valve shaft (20, 120).

Abstract: The invention relates to an ejector arrangement (1, 40) comprising a housing (11) and at least two ejectors (2, 3, 41, 42) arranged in said housing (11) along a common axis (13). Each ejector (2, 3, 41, 42) has a motive inlet (4, 5), a suction inlet (6, 7), an outlet (8, 9) and a valve element (23, 24, 43, 44). The task of the invention is to provide an ejector arrangement that allows for a good control of the mass flow of fluid through the ejector arrangement while keeping the construction simple. According to the invention the above task is solved in that the ejector arrangement (1, 40) comprises a common actuator (25, 55), that is arranged to engage at least two of the valve elements (23, 24, 43, 44) to open the motive inlets (4, 5).

Abstract: A solenoid valve (1) is described comprising a first port (2), a second port (3), a valve element (4) and a valve seat (5) arranged between said first port (2) and said second port (3), a coil (12) and a yoke arrangement (14-16), said coil (12) being magnetically linked to said yoke arrangement (14-16), said yoke arrangement (14-16) having a movable armature (16). In such a solenoid valve the generation of noise should be kept low.

Abstract: A valve (9) for use in a vapour compression system (1) is disclosed. The valve (9) comprises a first inlet (13) arranged to be connected to a gaseous outlet (11) of a receiver (6), a second inlet (14) arranged to be connected to an outlet of an evaporator (8), a first outlet (15) arranged to be connected to an inlet of a compressor unit (2), a non-return valve arrangement (19) arranged to allow a fluid flow from the second inlet (14) towards the first outlet (15), but to prevent a fluid flow from the first outlet (15) towards the second inlet (14), and a control valve mechanism (20) arranged to control a fluid flow from the first inlet (13) towards the first outlet (15).

Abstract: The invention relates to an actuator for a valve in a refrigeration system. The invention also relates to a valve with such actuator, and to a refrigeration system with such valve. The actuator comprises an elongated Shape Memory Alloy (SMA) element extending along two or more string-like extensions from a distant end to a proximate end in relation to a valve element of a valve. The SMA element, when forming part of the valve, may extend from the distant end to the proximate end connected to a housing of the SMA element, however, electrically insulated from the housing. An encapsulation may provide a thermal resistance, a thermal conductor and/or an electrical resistance between the SMA element and other elements or the surroundings of the SMA element.

Abstract: An ejector arrangement (1) is provided comprising a housing (5), at least two ejectors (2) arranged in said housing (5), each ejector (2) having a motive inlet (3), a suction inlet (29), an outlet (11) and a longitudinal axis (17). Such an arrangement should have a simple construction. To this end said suction inlet (29) of said ejectors (2) are connected by means of fluid paths to a common suction line (8).

Abstract: An electronic expansion valve (1) is provided, comprising an inlet (9), an outlet (8), an armature (2), a stop member (3), a biasing member (4) and a solenoid coil (12). The biasing member (4) provides a biasing force on the armature (2) towards a closing direction while the solenoid coil (12) may be provided with a current to provide a magnetic force on the armature (2) towards an opening direction. It is intended to provide an electronic expansion valve that may be controlled more precisely and has a higher safety. To this end the pressure difference between the inlet pressure and the outlet pressure provides a differential pressure force on the armature (2) towards an opening direction to allow a fluid flow from the inlet (9) to the outlet (8), and furthermore the armature (2) is displaced away from the stop member (3) to allow a fluid flow from the inlet (9) to the outlet (8) if the sum of the magnetic force and the differential pressure force on the armature (2) exceeds the biasing force.

Abstract: A solenoid valve (1) is provided comprising a housing, an inlet, an outlet, main valve means located between said inlet and said outlet, said main valve means comprising a main valve element, pilot valve means adjusting a pressure difference over said main valve element and having a pilot valve element, a coil, a yoke arrangement magnetically linked to said coil, and armature means for moving said pilot valve element. Such a solenoid valve should achieve a large opening stroke without unduly increasing the coil and yoke arrangement. To this end said armature means comprise a first part attractable by said yoke means to perform an opening stroke, and a second part carrying said pilot valve element, wherein said first part is movable relative to said second part in a first section of said opening stroke and is dragging said second part in a second section of said opening stroke following said first section.

Abstract: The invention relates to an ejector arrangement (1, 40) comprising a housing (11) and at least two ejectors (2, 3, 41, 42) arranged in said housing (11) along a common axis (13). Each ejector (2, 3, 41, 42) has a motive inlet (4, 5), a suction inlet (6, 7), an outlet (8, 9) and a valve element (23, 24, 43, 44). The task of the invention is to provide an ejector arrangement that allows for a good control of the mass flow of fluid through the ejector arrangement while keeping the construction simple. According to the invention the above task is solved in that the ejector arrangement (1, 40) comprises a common actuator (25, 55), that is arranged to engage at least two of the valve elements (23, 24, 43, 44) to open the motive inlets (4, 5).

Abstract: A valve (9) for use in a vapour compression system (1) is disclosed. The valve (9) comprises a first inlet (13) arranged to be connected to a gaseous outlet (11) of a receiver (6), a second inlet (14) arranged to be connected to an outlet of an evaporator (8), a first outlet (15) arranged to be connected to an inlet of a compressor unit (2), a non-return valve arrangement (19) arranged to allow a fluid flow from the second inlet (14) towards the first outlet (15), but to prevent a fluid flow from the first outlet (15) towards the second inlet (14), and a control valve mechanism (20) arranged to control a fluid flow from the first inlet (13) towards the first outlet (15).

Abstract: A solenoid valve (1) is provided comprising a housing, an inlet, an outlet, main valve means located between said inlet and said outlet, said main valve means comprising a main valve element, pilot valve means adjusting a pressure difference over said main valve element and having a pilot valve element, a coil, a yoke arrangement magnetically linked to said coil, and armature means for moving said pilot valve element. Such a solenoid valve should achieve a large opening stroke without unduly increasing the coil and yoke arrangement. To this end said armature means comprise a first part attractable by said yoke means to perform an opening stroke, and a second part carrying said pilot valve element, wherein said first part is movable relative to said second part in a first section of said opening stroke and is dragging said second part in a second section of said opening stroke following said first section.

Abstract: A magnetic valve (1) in which a valve housing (2), an armature tube (3), an inlet connection (4) and an outlet connection (5) form a single valve part is provided. An armature (9) made from a soft magnetic material is arranged movably inside the armature tube (3). A coil (16) is arranged externally to the armature tube (3) in such a manner that the armature tube (3) and the armature (9) are arranged inside the windings of the coil (16). A valve closing element (10) is connected to the armature (9) and is movable between a position in which it abuts a valve seat (8) and positions in which it does not abut the valve seat 8, thereby closing and opening the valve (1). In one embodiment, the flow path through the valve (1) from the inlet opening (6) to the outlet opening (7) does not pass through the windings of the coil (16). In another embodiment, the armature tube (3) comprises a closed end part (3a).

Abstract: A solenoid valve (1) is described comprising a first port (2), a second port (3), a valve element (4) and a valve seat (5) arranged between said first port (2) and said second port (3), a coil (12) and a yoke arrangement (14-16), said coil (12) being magnetically linked to said yoke arrangement (14-16), said yoke arrangement (14-16) having a movable armature (16). In such a solenoid valve the generation of noise should be kept low.

Abstract: An electronic expansion valve (1) is provided, comprising an inlet (9), an outlet (8), an armature (2), a stop member (3), a biasing member (4) and a solenoid coil (12). The biasing member (4) provides a biasing force on the armature (2) towards a closing direction while the solenoid coil (12) may be provided with a current to provide a magnetic force on the armature (2) towards an opening direction. It is intended to provide an electronic expansion valve that may be controlled more precisely and has a higher safety. To this end the pressure difference between the inlet pressure and the outlet pressure provides a differential pressure force on the armature (2) towards an opening direction to allow a fluid flow from the inlet (9) to the outlet (8), and furthermore the armature (2) is displaced away from the stop member (3) to allow a fluid flow from the inlet (9) to the outlet (8) if the sum of the magnetic force and the differential pressure force on the armature (2) exceeds the biasing force.

Abstract: An ejector arrangement (1) is provided comprising a housing (5), at least two ejectors (2) arranged in said housing (5), each ejector (2) having a motive inlet (3), a suction inlet (29), an outlet (11) and a longitudinal axis (17). Such an arrangement should have a simple construction. To this end said suction inlet (29) of said ejectors (2) are connected by means of fluid paths to a common suction line (8).

Abstract: A flow control valve (1) and a method for assembling a flow control valve (1) are disclosed. The flow control valve (1) comprises a first housing part (2) and a second housing part (3) attached directly to each other, in such a manner that the first housing part (2) and the second housing part (3) form a substantially closed housing. The first housing part (2) defines a first flow section (4), a second flow section (5), a connecting port (6) fluidly interconnecting the first flow section (4) and the second flow section (5), and a valve seat (7) arranged at the connecting port (6). The flow control valve (1) further comprises a frame part (9) arranged in an interior part of the housing formed by the first housing part (2) and the second housing part (3), the frame part (9) having mounted thereon a valve element (10, 13) arranged movably relative to the valve seat (7), a moving mechanism, e.g. including a spindle (12), for moving the valve element (10, 13), and an actuating mechanism, e.g.

Abstract: A proportional valve including a housing having an inlet and an outlet, and a valve element movably positioned in the housing between the inlet and the outlet. The valve element having a pilot valve opening, a first pressure chamber with a pressure acting on the valve element in a first direction, and a second pressure chamber with a pressure acting on the valve element in a second direction opposite to the first direction. A pilot valve element actuated by a drive mechanism to cooperate with the pilot valve opening to form a pilot valve. A flow resistance between the inlet and the first pressure chamber is smaller than a flow resistance between the inlet and the second pressure chamber. The pilot valve opens into a third pressure chamber connected to the outlet via a throttled flow path.

Abstract: The invention relates to a solenoid valve with a housing as well as an inlet and an outlet, wherein the solenoid valve further comprises a valve element and an orifice, wherein the orifice comprises an orifice inlet and an orifice outlet. In order to increase the maximum operating pressure differential of the solenoid valve the orifice is provided in a membrane and the orifice has a diffuser characteristic in a direction from the orifice inlet to the orifice outlet.

Abstract: A magnetic valve (1) comprising a valve housing (2) defining an inlet opening (3) and an outlet opening (4), a valve seat (11), a valve closing element, and an armature tube (7) is disclosed. A piston (6) is arranged movably inside the armature tube (7), said piston (6) being connected to the valve closing element, and an armature (5) is arranged movably at least partly inside the piston (6). A coil (9) is arranged externally to the armature tube (7) in such a manner that at least a part of the armature (5) arranged inside the piston (6) is arranged inside the windings of the coil (9).

Abstract: The invention relates to an actuator for a valve in a refrigeration system. The invention also relates to a valve with such actuator, and to a refrigeration system with such valve. The actuator comprises an elongated Shape Memory Alloy (SMA) element extending along two or more string-like extensions from a distant end to a proximate end in relation to a valve element of a valve. The SMA element, when forming part of the valve, may extend from the distant end to the proximate end connected to a housing of the SMA element, however, electrically insulated from the housing. An encapsulation may provide a thermal resistance, a thermal conductor and/or an electrical resistance between the SMA element and other elements or the surroundings of the SMA element.