Abstract:
The invention provides an elastomer transducer for converting between electrical energy and mechanical energy. The transducer comprises a composite material with a body and a film (3), the body comprising at least an electrically conductive portion and an anisotropic body (2). In the anisotropic body, voids (5, 6) provide an inferior flexure resistance and an anisotropic compliance to stretch in a first direction. The film comprises an elastomer material which could be at least partly embedded in the voids.
Abstract:
Es wird ein Thermostatventilaktuator (11) für eine Warmwasserheizungsanlage (1) vorgeschlagen, der ein temperaturabhängiges Steuerelement (15, 16), ein Betätigungselement (13) und eine Beeinflussungsvorrichtung (23), welche die Regelungscharakteristik des Steuerelements (15, 16) beeinflusst, aufweist. Die Beeinflussungsvorrichtung (23) beeinflusst die Regelungscharakteristik des Steuerelements (15, 16) mittels einer elastischen Koppelvorrichtung (26). Die Beeinflussungsvorrichtung (23) kann eine Federeinrichtung, einen Elektromotor, einen Kraftmesssensor, eine elektronische Steuerung und eine Digitalanzeigevorrichtung aufweisen.
Abstract:
A method for controlling an opening degree of a valve arranged in a vapour compression system, such as a refrigeration system or a heat pump. The vapour compression system comprises a compressor, a condenser, a valve and an evaporator arranged in a refrigerant flow path. According to a first aspect, the method comprises the steps of obtaining a superheat value for the system and comparing it to a reference superheat value, determining a maximum opening degree of the valve, and controlling the opening degree of the valve in accordance with the comparing step, and in such a manner that the opening degree does not exceed the maximum opening degree. The maximum opening degree is determined dynamically as a function of a mean temperature difference across the evaporator. Thereby the it is ensured that it is possible to open the valve as much as possible, while keeping the operation of the system safe in the sense that the risk that liquid refrigerant is allowed to pass through the evaporator is minimised due to the maximum opening degree. According to a second aspect, an adjustment value is calculated on the basis of the superheat value, the reference superheat value and a generated control signal. Thereby a faster response to changes in the operating conditions for the vapour compression system is obtained.
Abstract:
The invention provides a thermostat which is attachable to a valve, e.g. of a radiator for controlling the temperature of an environment. The thermostat comprises a handle by which a user may set a desired temperature set-value, and a thermo sensitive element which controls the valve based on a sensed temperature. To enable temporary changes, the thermostat further comprises a switch function which can be activated to change the setting of the valve without changing the set-value.
Abstract:
A valve part (1), such as a movable part (9) or a stationary part (8) of an actuator for a magnetic valve (7). The valve part (1) has a shading ring (6) made from an electrically conductive material mounted in a groove (3) formed in a surface of the valve part (1). The groove (3) defines a first wall (4, 5) and a second wall (5, 4), the first wall (4, 5) and the second wall (5, 4) extending from the surface into the valve part (1) in such a manner that at least the first wall (4, 5) is inclined relatively to a direction being substantially perpendicular to a substantially plane part (2) of the surface. Furthermore, a method of mounting a shading ring (6) in a valve part (1) comprising the steps of forming a groove (3) as defined above, inserting the shading ring (6) in the groove (3) and deforming the shading ring (6). The inclination of at least one of the walls (4, 5) of the groove (3) ensures a better friction force between the shading ring (6) and the walls (4, 5) of the groove (3). Furthermore, the inclination of one of the walls (4, 5) may be such that the shading ring (6) is mechanically prevented from leaving the groove (3) after it has been inserted therein and deformed. Accordingly, the risk that the shading ring (6) leaves the groove (3) is decreased.
Abstract:
The invention provides an electromagnetic actuator (1) for moving a closure member of a valve (13). The actuator contains a solenoid (2), a yoke (11) and a wire spring (7) for fixing a guide tube (4), in which the closure member is movable, to the solenoid. The spring is formed so that it further fixes the yoke to the solenoid. Accordingly, the number of components, is reduced, and detaching of the yoke may easily be facilitated.
Abstract:
The invention provides a valve comprising a house (2) and a drum (3) rotatable in the house. The house comprises a plurality of substantial identical tubular mid-section house members (4), a bottom house member (5), and a top house member (6). When connecting the house members (4, 5, 6) to each other, a continuous outer wall surrounding a house cavity, a port (7), and a plurality of nozzles (8) being in fluid communication with the house cavity is provided. The drum comprises a plurality of substantial identical tubular mid-section drum members (9), a bottom drum member (10), and a top drum member (11). When connecting the drum members ((9, 10, 11) to each other, an inner wall having an outer surface (12) being adapted for rotation in contact with a corresponding inner surface (13) of the outer wall, the inner wall comprising a plurality of conduits (14) 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. Furthermore, the invention provides a set of members to form a valve, and a system for thermal exchange.
Abstract:
Steuereinheiten für moderne Heizungsanlagen sind oftmals kompliziert und wenig intuitiv zu programmieren. Die Programmierung einer solchen Steuereinheit soll vereinfacht werden und intuitiver gestaltet werden. Dazu wird vorgeschlagen, dass die über den Tag verteilt auftretenden Schaltzustände grafisch schematisiert dargestellt werden.
Abstract:
The invention provides a restriction element for a pressure sensor to protect the pressure element from flow related damage. The pressure sensor comprising a housing with a fluid inlet channel and a chamber with a pressure element. The pressure element comprises a housing part with a recess covered by a sealing diaphragm forming a cavity. In the oil-filled cavity a sensor element is placed. The restriction element is placed in front of the sealing diaphragm protecting the pressure element and especially the sealing diaphragm from a damaging pulse or other flow related damages caused by sudden changes in a flow system for example by closing a valve.
Abstract:
Es wird ein Abgleichsystem für eine Fußbodentemperierungs-Anordnung (1) angegeben mit mindestens zwei Temperierungskreisen (6-8), von denen jeder eine in einem Fußboden oder in einer Deckenwand verlegte Wärmeträgerleitung mit einem Vorlauf und einem Rücklauf (21-23) aufweist. Man möchte die Verteilung der Wärmeleistung auf einzelne Heizungskreise vereinfachen können. Dazu ist vorgesehen, dass an jedem Rücklauf (21-23) ein Rücklauftemperaturregler (27-29) mit einem die Temperatur im jeweiligen Rücklauf (21-23) erfassenden Temperatursensor (36) angeordnet ist und alle Rücklauftemperaturregler (27-29) ein gleiches Temperatursteuerverhalten aufweisen.