Abstract: A reversible refrigeration system comprises a compressor arranged to compress gaseous refrigerant, a four-way valve switchable between a heating position in which a payload is heated and a cooling position in which the payload is cooled. A payload heat exchanger is connected to the payload requiring heating or cooling, and a dump heat exchanger, two one-way valves, and two controllable expansion valves as well, wherein the one-way valves each are connected parallel to a corresponding expansion valve, wherein switching of the four-way valve between the heating position and the cooling position controls a flow of pressurized refrigerant to either of the payload heat exchanger or the dump heat exchanger and wherein the heat exchanger which receives the flow of pressurized refrigerant functions as a condenser and the other heat exchanger functions as an evaporator.

Abstract: A brazed plate heat exchanger (100; 200) comprises a number of heat exchanger plates (120a-120h; 201-204) provided with a pressed pattern of ridges (R) and grooves (G) adapted to keep the plates on a distance from one another by providing contact points between crossing ridges (R) and grooves (G) of neighbouring plates under formation of interplate flow channels for media to exchange heat, said interplate flow channels being in selective fluid communication with first, second, third and fourth large port openings (O1, O2, O3, O4; 210a, 210b, 210c, 210d) and first and second small port openings (SO1, SO2) for letting in fluids to exchange heat, characterized in that fluid passing between the first and second large port openings (O1, O2; 210a, 210b) exchanges heat with fluids passing between third and fourth port openings (O3, O4; 210c, 210d) over a first heat exchanging portion of each plate and fluid passing between the first and second small port openings (SO1, SO2) over a second portion of each plate.

Abstract: A brazing material for brazing a brazed plate heat exchanger comprising a number of heat exchanger plates being provided with a pressed pattern of ridges and grooves adapted to provide contact points between neighbouring heat exchanger plates, such that the heat exchanger plates are kept on a distance from one another and such that interplate flow channels for media to exchange heat are formed between the heat exchanger plates comprises a brazing alloy comprising at least one melting point depressing element and metals resembling the composition of the heat exchanger plates. The brazing material comprises a mixture between grains of a melting brazing material having solidus and liquidus temperatures lower than a brazing temperature and a non-melting brazing material having solidus and liquidus temperatures above the brazing temperature.

Abstract: A brazed plate heat exchanger comprises a number of heat exchanger plates (100) provided with a pressed pattern comprising ridges (R) and grooves (G). The ridges and grooves of neighboring plates contact one another in order to keep the plates on a distance from one another under formation of interplate flow channels for media to exchange heat when the heat exchanger plates are placed in a stack to form the heat exchanger. Means (120a, 120b) are provided for allowing temperature measurement of a fluid present in a second flow channel counted from an end of the stack of heat exchanger plates (100).

Abstract: A plate heat exchanger (100) comprises a number of plates (110) provided with a pressed pattern of ridges (R) and grooves (G) arranged to keep the plates (110) on a distance from one another under formation of interplate flow channels for media to exchange heat. The interplate flow channels communicate with port openings (A, B, C, 140) being in selective communication with said interplate flow channels, one of the port openings (140) providing for connection to a downstream side of an expansion valve (EXP) such that coolant from the expansion valve (EXP) may enter the interplate flow channels communicating with the one port opening (140). A heat exchanging means (160, 165, 150, 155; HEP, LC, DP) is provided inside the one port opening (140), said heat exchanging means (160, 165, 150, 155; HEP, LC, DP) being arranged for exchanging heat between coolant downstream the expansion valve (EXP) and coolant about to enter the expansion valve (EXP).

Abstract: An evaporator for an absorption heat pump or a single coolant cooling process comprises a number of stacked plates provided with a pressed pattern to hold the plates on a distance from one another to form a heat exchanging strip, vapor leading spaces and outer walls, the heat exchanging strip being designed such that flow channels are formed by internal surfaces of the strip, said flow channels connecting a heat carrier inlet and a heat carrier outlet, wherein a coolant forms a falling film on external surfaces of the heat carrier channels by being provided above the heat carrier channels by a coolant inlet, wherein coolant being vaporized from the external surfaces by heat from a heat carrier flowing from the inlet to the outlet rapidly enters the vapor leading spaces. The vapor leading spaces are provided between the heat exchanging strip and the outer walls.

Abstract: A combined evaporator and condenser (1100) is manufactured from a number of stacked heat exchanger plates (980) provided with a pressed pattern of ridges and grooves for keeping the plates on a distance from one another for creating interplate flow channels (1180, 1200). The evaporator portion (1120, 1150) of the combined evaporator and condenser (1100) has a coolant outlet connectable to an expansion valve (R), and a connection between the condenser portion and the expansion valve (R) runs through the evaporator portion.

Abstract: An evaporator for an absorption heat pump or a single coolant cooling process comprises a number of stacked plates provided with a pressed pattern to hold the plates on a distance from one another to form a heat exchanging strip, vapor leading spaces and outer walls, the heat exchanging strip being designed such that flow channels are formed by internal surfaces of the strip, said flow channels connecting a heat carrier inlet and a heat carrier outlet, wherein a coolant forms a falling film on external surfaces of the heat carrier channels by being provided above the heat carrier channels by a coolant inlet, wherein coolant being vaporized from the external surfaces by heat from a heat carrier flowing from the inlet to the outlet rapidly enters the vapor leading spaces. The vapor leading spaces are provided between the heat exchanging strip and the outer walls.

Abstract: A plate heat exchanger for exchanging heat between mediacomprises a number of stacked plates (A, B, C, D), the plates being provided with a first, large scale pressed pattern comprising ridges (R) and grooves (G) intended to keep first (A, B) and second (B,C) pairs of stacked plates on a distance from one another, such that flow channels for a first medium is formed in spaces between said plate pairs. Contact points are provided between the plate pairs in points where the large scale pressed pattern of neighboring plate pairs contact one another. The plates of each plate pair (A, B; C, D) are kept on a distance from one another by a small-scale pressed pattern comprising ridges (r) and grooves (g).

Abstract: A brazed heat exchanger comprises a number of heat exchanger plates (100, 200, 300) provided with a pressed pattern of ridges (110a) and grooves (110b) arranged such that flow channels for media to exchange heat are formed between neighboring plates (100,200,300). The plates (100,200,300) are further provided with port openings (120a-d) in selective communication with said flow channels and with a circumferential edge formed by skirts (130;240; 335) of neighboring plates (100,200,300) overlapping one another. A reinforcement portion (140; 250;340) extends outside the skirt (130;240; 335), and comprises a ribbon of sheet metal.

Abstract: A brazed heat exchanger (100,200) for exchanging heat between fluids comprises a number of heat exchanging plates (110,210) provided with a pressed pattern of ridges (120,220) and grooves (130,230). The heat exchanger plates (110,210) are stacked onto one another such that flow channels (211,212) are formed between said plates (110,210), and the flow channels (211,212) are in selective communication with port openings (140,240). Port skirts (170,250,260) are arranged on the heat exchanging plates (110,210), said port skirts (170, 250, 260) at least partly surrounding the port openings (140,240), extending in a generally perpendicular direction as compared to a plane of the heat exchanger plates (110,210) and being arranged to overlap one another to form a pipe like configuration or a part thereof.

Abstract: A combined evaporator and condenser (1100) is manufactured from a number of stacked heat exchanger plates (980) provided with a pressed pattern of ridges and grooves for keeping the plates on a distance from one another for creating interplate flow channels (1180, 1200).

Abstract: A plate heat exchanger (100) comprises a number of plates (110) provided with a pressed pattern of ridges (R) and grooves (G) arranged to keep the plates (110) on a distance from one another under formation of interplate flow channels for media to exchange heat. The interplate flow channels communicate with port openings (A, B, C, 140) being in selective communication with said interplate flow channels, one of the port openings (140) providing for connection to a downstream side of an expansion valve (EXP) such that coolant from the expansion valve (EXP) may enter the interplate flow channels communicating with the one port opening (140). A heat exchanging means (160, 165, 150, 155; HEP, LC, DP) is provided inside the one port opening (140), said heat exchanging means (160, 165, 150, 155; HEP, LC, DP) being arranged for exchanging heat between coolant downstream the expansion valve (EXP) and coolant about to enter the expansion valve (EXP).

Abstract: The invention relates to a plate heat exchanger in which the heat exchanging plates are brazed together along the periphery (17) of the exchanger and around port holes (2?,4?) in neighboring plates to prevent that the heat exchanging flows mix when flowing through port channels comprising said port holes (2?,4?). In order to facilitate draining of heat exchanging media from the exchanger and in order to obtain better exploitation of the heat exchanger volume the sealing of neighboring plates around port holes may according to the invention be effected in different plans (24, 25).

Abstract: A brazed heat exchanger (100, 200) comprises a number of heat exchanger plates (110, 120, 130, 140, 150) provided with a pressed pattern of ridges and grooves to form flow channels for media to exchange heat between neighboring heat exchanger plates (110,120,130,140,150). The flow channels are in selective fluid communication with port openings (160). The port openings (160) are provided with dented surfaces (180; 280) being arranged along an interior circumference of the port openings (160) and comprising ridges (181; 282) and grooves (182; 281), said ridges (181; 282) and grooves (182; 281) being arranged such that a ridge (181; 282) of one heat exchanger plate (110, 120, 130, 140, 150) contacts a groove (182; 281) of a neighboring plate (110,120,130,140,150) to form a honeycomb pattern.

Abstract: An end plate (200, 300) for a brazed heat exchanger comprises a relief pattern comprising ridges (230, 330) and grooves (240, 340) pressed into the plate material. The relief pattern (330, 340) is symmetric.

Abstract: A plate heat exchanger for exchanging heat between mediacomprises a number of stacked plates (A, B, C, D), the plates being provided with a first, large scale pressed pattern comprising ridges (R) and grooves (G) intended to keep first (A, B) and second (B,C) pairs of stacked plates on a distance from one another, such that flow channels for a first medium is formed in spaces between said plate pairs. Contact points are provided between the plate pairs in points where the large scale pressed pattern of neighboring plate pairs contact one another. The plates of each plate pair (A, B; C, D) are kept on a distance from one another by a small-scale pressed pattern comprising ridges (r) and grooves (g).

Abstract: A brazed plate heal exchanger (400) for exchanging heat between at least two media, wherein at least one of the media could have a working pressure of at least 50 bars, comprises a number of heat exchanger plates (100; 200) comprising a pressed pattern of ridges and grooves. Those are adapted to form flow channels for media to exchange heat flowing through said flow channels. The plates (100; 200) further comprises port openings (120, 130; 220; 300, 310) arranged to allow fluid communication with said flow channels and a skirt (140) extending around the periphery of the heat exchanger plates (100; 200). Skirts (140) of neighboring plates (100; 200) are arranged to contact one another in an overlapping manner in order to obtain a connection sealing the flow channels. At least one of said port openings (120, 130; 220; 300, 310) is placed on a peninsula (150) surrounded by the skirt (140) over at least 100 degrees.

Abstract: A brazed heat exchanger (100,200) for exchanging heat between fluids comprises a number of heat exchanging plates (110,210) provided with a pressed pattern of ridges (120,220) and grooves (130,230). The heat exchanger plates (110,210) arc stacked onto one another such that flow channels (211,212) are formed between said plates (110,210), and the flow channels (211,212) are in selective communication with port openings (140,240). Port skirts (170,250,260) are arranged on the heat exchanging plates (110,210), said port skirts (170, 250, 260) at least partly surrounding the port openings (140,240), extending in a generally perpendicular direction as compared to a plane of the heat exchanger plates (110,210) and being arranged to overlap one another to form a pipe like configuration or a part thereof.

Abstract: A brazed heat exchanger comprises a number of heat exchanger plates (100, 200, 300) provided with a pressed pattern of ridges (110a) and grooves (110b) arranged such that flow channels for media to exchange heat are formed between neighboring plates (100,200,300). The plates (100,200,300) are further provided with port openings (120a-d) in selective communication with said flow channels and with a circumferential edge formed by skirts (130;240; 335) of neighboring plates (100,200,300) overlapping one another. A reinforcement portion (140; 250;340) extends outside the skirt (130;240; 335), and comprises a ribbon of sheet metal.