Abstract:
A proportional valve is provided comprising a valve (1) comprising a housing (2) having an inlet (3) and an outlet (4), a valve element (5) being positioned be¬ tween said inlet (3) and said outlet (4), said valve element (5) being moveable in said housing (2), said valve element (5) having a pilot valve opening (7), a first pressure chamber (16), a pressure in said first pressure chamber (16) acting on said valve element (5) in a first direction, a second pressure chamber (17), a pressure in said pressure chamber (17) acting on said valve element (5) in a second direction opposite to said first direction, a pilot valve element (6) coop¬ erating with said pilot valve opening (7) to form a pilot valve, said pilot valve element (6) being actuated by drive means (8), wherein a flow resistance be¬ tween said inlet (3) and said first pressure chamber (16) is smaller than a flow resistance between said inlet (3) and said second pressure chamber (17). In such valve it is possible to reduce the electrical power needed to operate the solenoid. To this end said pilot valve opens into a third pressure chamber (19), said third pressure chamber (19) being connected to said outlet (3) via a throttled flow path (20).
Abstract:
An expansion valve (16) for a vapour compression system (1) and a vapour compression system (1) are disclosed. The expansion valve (16) comprises a first valve member (17), a second valve member (20) and a third valve member (21), said valve members (17, 20, 21) being arranged in such a manner that relative movements at least between the first valve member (17) and the second valve member (20), and between the first valve member (17) and the third valve member (21) are possible. The expansion valve (16) is switchable between a first state in which an opening degree of the expansion valve (16) is determined by the relative position of the first valve member (17) and the second valve member (20), and a second state in which an opening degree of the expansion valve (16) is determined by the relative position of the first valve member (17) and the third valve member (21). The expansion valve (16) is automatically moved between the first state and the second state in response to a change in direction of fluid flow through the expansion valve (16). The expansion valve (16) is suitable for use in a vapour compression system (1) being capable of selectively operating in air condition mode or heat pump mode, and where reversal of refrigerant flow is therefore necessary. The expansion valve (16) automatically ensures that expanded refrigerant is supplied to a relevant heat exchanger (3, 4), thereby ensuring proper operation of the vapour compression system in air condition mode as well as in heat pump mode.
Abstract:
A method for controlling a flow of refrigerant to an evaporator (1) arranged in a vapour compression system is disclosed. The evaporator (1) comprises at least two evaporator tubes (2) arranged fluidly in parallel, and a header (3) being fluidly connected between the expansion device (5) and the evaporator tubes (2). The method comprises the steps of alternatingly allowing and preventing a flow of mixed phase refrigerant into the header (3). The step of allowing a flow of mixed phase refrigerant into the header (3) is performed in such a manner that a pressure level in the header (3) is increased significantly and abruptly. Thereby the liquid part and the gaseous part of the mixed phase refrigerant are distributed substantially homogeneously in the header (3), and the same filling degree is obtained in the tubes (2). The potential refrigeration capacity of the evaporator (1) can be utilised to a greater extent without risking that liquid refrigerant passes the evaporator (1).
Abstract:
A method for operating a valve comprising a first valve part (1) having at least one opening (2) and a second valve part (3) having at least one opening (4) formed is disclosed. The first (1) and second (3) valve parts are adapted to perform relative movements, the relative position of the opening(s) (2) of the first valve part (1) and the opening (s) (4) of the second valve part (3) defining an opening degree of the valve by means of an overlapping area of the openings (2, 4). The method comprises the step of moving the first valve part (1) and/or the second valve part (3) from a position defining a maximum opening degree of the valve towards a position defining a minimum opening degree of the valve in such a manner that the velocity of the relative movement between the first valve part (1) and the second valve part (3) is decreased as the overlapping area decreases.
Abstract:
Die Erfindung betrifft eine Getränkeabgabeeinrichtung (1) für ein Getränk (2) mit einem Wärmetauscher (3), der mit einem Wärmeträger (4), insbesondere Wasser, in Wirkverbindung steht, und eine Steuereinheit (5) auf- weist. Der Energieverbrauch in der Getränkeabgabeeinrichtung soll gesenkt werden. Dazu ist vorgesehen, dass die Steuereinheit (5) in Abhängigkeit von einem Getränkedurchf luss und einer Ist- Wärmeaufnahmefähigkeit des Wärmeträgers (4) zumindest ein Aggregat (6) oder (7) ansteuert und die Soll- Wärmeaufnahmefähigkeit regelt.
Abstract:
Es wird eine Steuerkastenanordnung (1) angegeben mit einem Steuerkasten (2), einer Montageplatte (6), die eine Vorderseite (14), eine Rückseite (13) und eine Öffnung (8) aufweist, in die der Steuerkasten (2) angeordnet ist, und eine Halteeinrichtung. Man möchte eine einfache Montage ermöglichen. Hierzu ist vorgesehen, dass die Halteeinrichtung mehrere Riegel (16) aufweist, die an der Rückseite (13) der Montageplatte (6) anliegen, wobei mindestens ein Riegel (16) durch das Zusammenwirken von Steuerkasten (2) und Rahmen (7) in einen Raum auf der Rückseite (13) der Montageplatte (6) verdrängt ist.
Abstract:
Es wird eine Axialkolbenmaschine angegeben mit einer Zylindertrommel, die mindestens zwei Zylinder aufweist, einem Kolben (20) in jedem Zylinder, der mit einer Gleitfläche an einer Schrägscheibe (23) anliegt, einer Ventilanordnung, die ein stationäres Anschlusselement und ein mit der Zylindertrommel rotierendes Ventilelement aufweist, wobei das Anschlusselement eine mit einem Einlassanschluss (33) verbundene Pumpeneinlassöffnung (30) und eine mit einem Hochdruckanschluss verbundene Pumpenauslassöffnung (31) aufweist. Man möchte bei der Verwendung einer derartigen Maschine in einer Umkehrosmoseeinrichtung einen guten Wirkungsgrad erzielen. Hierzu weist das Anschlusselement eine Motoreinlassöffnung (32) auf, die mit einem Hochdruckrücklaufanschluss verbunden ist und mit jedem Zylinder über einen vorbestimmten ersten Drehwinkelbereich der Zylindertrommel in Verbindung steht.
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:
A valve assembly (1) comprising an inlet opening, a distributor and an outlet part comprising at least two outlet openings. The distributor comprises an inlet part (5) fluidly connected to the inlet opening, and is arranged to distribute fluid medium received from the inlet opening to at least two parallel flow paths, preferably of a heat exchanger (3). The valve assembly (1) further comprises a first valve part and a second valve part arranged movable relative to each other in such a manner that the mutual position of the valve parts determines the fluid flow from the inlet opening to each of the outlet openings of the outlet part. Finally, the valve assembly (1) comprises a header (2) forming an integral part of the valve assembly (1). The header (2) is arranged to form an interface towards a heat exchanger (3) comprising at least two flow paths, and it provides fluid connections in such a manner that each of the outlet openings (7, 9) is fluidly connected to a flow path of a heat exchanger (3) connected to the header (2).
Abstract:
Die Erfindung betrifft einen Verfahren zum Verbinden wenigstens zweier Teilbereiche (3, 4, 18, 19) zumindest eines Werkstücks. Ein erster Teilbereich (3, 18) eines Werkstücks wird mittels einer durch die Detonation eines Detonationsmediums (15, 23) erzeugten Druckwelle (7) auf einen zweiten Teilbereich (4, 19) eines Werkstücks aufgepresst. Dabei liegt die durch die Detonation erzeugte Druckwelle in einem Koppelmedium (15, 23), das zumindest einen der Teilbereiche des zumindest einen Werkstücks kontaktiert, als Stoßwelle oder Detonationswelle (7) vor.