Abstract: A four-way reversing valve for a high capacity reversible heat pump compressor includes a housing with four ports, namely a discharge port, a suction port, an evaporator port and a condenser port. It further includes a conically shaped rotor provided rotatably inside the housing for varying flow paths between the four ports, wherein a large diameter face of the rotor comprises two separated openings, wherein a first opening fluidly connects the large diameter face to a small diameter face of the rotor via a first fluid conduit and a second opening fluidly connects the large diameter face to a radially outer portion of the rotor via a second fluid conduit. The disclosure further discloses a set having two or more four-way reversing valves.

Abstract: A four-way valve for a heat-pump arrangement includes a housing with four fluid connection ports, a rotatable valve element for switching the connections between the fluid connection ports, an actuator for rotating the valve element and sensor components on a low pressure side and a high pressure side of the valve for measuring properties of the fluid inside the housing. The disclosure is also directed at a heat-pump arrangement including a corresponding four-way valve and a housing for a four-way valve.

Abstract: A valve 10 for regulating a flow between a first and a second port 16, 18. A valve housing 12 includes a valve chamber 14 connected to the first and second ports 16, 18. A valve insert 26 inserted within the valve chamber 14 comprises a first cylinder 28 connected to a second cylinder 32 and a piston 34 movably arranged within the second cylinder 32. The piston 35 acts against a valve seat gasket 30. The first and said second cylinders 28, 32 are arranged axially aligned and connected by a releasable connection 44. The valve seat gasket 30 is arranged in a valve seat gasket chamber 62 formed between the first and second cylinders 28, 32 and providing a ring opening 80 for engagement of the valve seat gasket 30 with the piston 34.

Abstract: The invention relates to a sensor arrangement for providing a sensor signal S indicative of a vapor quality X of a medium flowing within a conduit 38a. A sensor includes a heating element and a temperature sensing element is arranged in thermal contact with a wall of a horizontally arranged portion 38a of the conduit 34. Processing means are disposed to deliver a sensor signal S based on an output of the temperature sensing element 52. The sensor 40 includes a sensor body 46 made of a metal material. The heating element 48 and the temperature sensing element 52 are arranged in thermal contact with the sensor body 46. The invention further relates to a cooling system 10 including at least one evaporator 32 for evaporating an ammonia refrigerant, at least one compressor 12 arranged to compress the evaporated refrigerant, and at least one condenser 18 for condensing the compressed refrigerant, and at least one evaporator pump 30 for pumping the condensed refrigerant to the evaporator 32.

Abstract: A four-way reversing valve for a high capacity reversible heat pump compressor includes a housing with four ports, namely a discharge port, a suction port, an evaporator port and a condenser port. It further includes a conically shaped rotor provided rotatably inside the housing for varying flow paths between the four ports, wherein a large diameter face of the rotor comprises two separated openings, wherein a first opening fluidly connects the large diameter face to a small diameter face of the rotor via a first fluid conduit and a second opening fluidly connects the large diameter face to a radially outer portion of the rotor via a second fluid conduit. The disclosure further discloses a set having two or more four-way reversing valves.

Abstract: The invention relates to a compressor unit (200) for a refrigeration system using a refrigerant. The compressor (200) unit includes a centrifugal compressor (201) for compressing the refrigerant, wherein the compressor (201) has a discharge outlet (204) for discharging the compressed refrigerant, and a check valve (1; 100; 301a). An inlet (83) of the check valve (1; 100; 301a) is in fluid connection with the discharge outlet (204) of the compressor (201). In order to provide a more reliable and more quite compressor unit (200), the check valve (1; 100; 301a) is a nozzle check valve including a damping mechanism (41, 50; 50, 141), wherein a closing parameter of the check valve (1; 100; 301a) is between 50 s/m2 and 2000 s/m2, wherein the closing parameter is a closing time of the check valve (1; 100; 301a) divided by a port area of the check valve (1; 100; 301a).

Abstract: An apparatus (1) for removing non-condensable gases from a refrigerant is described, said apparatus (1) comprising a pipe arrangement (2) having a pipe (3), cooling means (4) for the pipe (3), and venting means, wherein the pipe (3) comprises a connection geometry (5) for a connection to a refrigerant system. Such an apparatus should be operated with good efficiency. To this end the pipe comprises at least a first section (6) and a second section (7) which are directed in different directions.

Abstract: The invention relates to a cooling system and operating method therefor with a direct expansion cooling circuit for an ammonia refrigerant. A compressor 12 is provided to compress ammonia vapor 11. A condenser is provided to condense the ammonia vapor to obtain liquid ammonia 20. An evaporator 32 is provided to evaporate the liquid ammonia. A superheat vapor quality sensor 40 is arranged at a conduit 34 between at least a portion of the evaporator 32 and the compressor 12. The superheat vapor quality sensor 40 comprises a heating element 48 and a temperature sensing element 52. The superheat vapor quality sensor 40 is disposed to deliver a sensor signal S indicative of a superheat vapor quality X of refrigerant flowing through the conduit 34 from an output of the temperature sensing element 52. The superheat vapor quality sensor 40 is arranged on a wall of a horizontally arranged portion of the conduit 34 in a position forming an angle of more than 120° to a vertical upward direction.

Abstract: The invention relates to a sensor arrangement for providing a sensor signal S indicative of a vapor quality X of a medium flowing within a conduit 38a. A sensor includes a heating element and a temperature sensing element is arranged in thermal contact with a wall of a horizontally arranged portion 38a of the conduit 34. Processing means are disposed to deliver a sensor signal S based on an output of the temperature sensing element 52. The sensor 40 includes a sensor body 46 made of a metal material. The heating element 48 and the temperature sensing element 52 are arranged in thermal contact with the sensor body 46. The invention further relates to a cooling system 10 including at least one evaporator 32 for evaporating an ammonia refrigerant, at least one compressor 12 arranged to compress the evaporated refrigerant, and at least one condenser 18 for condensing the compressed refrigerant, and at least one evaporator pump 30 for pumping the condensed refrigerant to the evaporator 32.

Abstract: An apparatus (1) for removing non-condensable gases from a refrigerant is described, said apparatus (1) comprising a pipe arrangement (2) having a pipe (3), cooling means (4) for the pipe (3), and venting means, wherein the pipe (3) comprises a connection geometry (5) for a connection to a refrigerant system. Such an apparatus should be operated with good efficiency. To this end the pipe comprises at least a first section (6) and a second section (7) which are directed in different directions.

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: 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 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.

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 method for steering a vehicle, in which a steering motor (4) is activated in dependence of the activation of a steering member (1), a steering motor angle and a steering member angle are detected and an error in the correlation between the steering member (1) and the steering motor (4) is compensated, stored data being used for the compensation of the error. Further, the invention concerns a steering arrangement (100).

Abstract: The invention concerns a method of steering a vehicle, particularly an articulated vehicle, in which a valve element of a main valve is moved so that it releases or closes connections between a supply connection arrangement and a working connection arrangement in dependence of a steering direction and a steering angle. To improve the steering comfort, the movement speed of the valve element is controlled.

Abstract: A method for steering a vehicle, in which a steering motor (4) is activated in dependence of the activation of a steering member (1), a steering motor angle and a steering member angle are detected and an error in the correlation between the steering member (1) and the steering motor (4) is compensated, stored data being used for said compensation of the error. Further, the invention concerns a steering arrangement (100).