Abstract:
A capacitive transducer having a significantly increased actuation force and improved response time as compared to similar prior art capacitive transducers. In the capacitive transducer of the present invention it is not necessary to balance response time and actuation force or to provide pre-strain to the transducer in a direction of actuation. Additionally, buckling in the capacitive transducer is prevented, or at least substantially reduced, in a simple manner.
Abstract:
The invention provides a solenoid actuated valve with a plunger which moves in a sleeve under influence of a magnetic field from the solenoid and further comprising a damping device for reducing noise and wear caused by the plunger when it bounces against a top part located in the sleeve. The damping device comprises a first part which forms the limit of the travel of the plunger and another part which is allowed to move relative to the first part in a dampened movement. To enable application in a vacuum system, the damping device comprises a conduit which allows evacuation of a chamber confined between one end of the sleeve and the damping device. The invention further provides a damper for a solenoid actuated valve.
Abstract:
The invention provides a method for controlling the climate of an environment, e.g. a house, which exchanges thermal energy with an ambient space. Energy is supplied to the environment e.g. by radiators, floor heating, electrical heating fans etc. According to the method, a numerically expressed comfort criteria, and a numerically expressed weight of importance of compliance with the comfort criterion are defined. Subsequently, a supply of a specific amount of energy is considered, and with respect to that amount, a numerical expression of a degree of compliance with the comfort criterion, and a numerical expression of costs related to the supply of that amount of energy are provided.
Abstract:
The invention provides a liquid treatment apparatus such as a reverse osmosis apparatus wherein a portion of an inlet liquid permeates through a filter or a membrane e.g. to provide freshwater from saltwater. The apparatus comprises a pump which provides the necessary pressure of the liquid to drive the permeation process, and a recovery unit which transfers pressure of a residue quid to the inlet liquid. The pump and the recovery unit are driven at synchronous and variable speed to control the output and thereby e.g. to adjust for fouling of the filter or membrane. The invention further provides methods of controlling the synchronous speed, e.g. based on a pressure or based on the consumption of the produced liquid.
Abstract:
The invention concerns a control device for at least one heating, air-conditioning, ventilation or refrigeration system with a memory for a temperature control program and a signal outlet. It is endeavoured to simplify the programming. For this purpose, the memory is arranged in an element (5), which comprises a communication interface (6) and which can be dismounted from the control device, the communication interface (6) being connectable to an external input device and the control device (1) comprising an electrical supply device (3) which can transmit electrical energy to the element (5).
Abstract:
The invention provides a method and a system for controlling floor heating or climate regulating systems with long time constants. According to the invention, a flow of a fluid is provided through the floor or through a similar medium with large thermal inertia. An induced heat is determined by adding up a plurality of differences between an inlet temperature of the fluid when it enters the medium and an outlet temperature of the fluid when it leaves the medium. The temperatures are sampled with a fixed sampling time and within a fixed period of time, and a corresponding change in temperature of the medium over the fixed period of time is determined. In the future, the temperature of that medium is controlled by use of a ratio between the induced heat and the change in temperature.
Abstract:
A method for controlling a temperature in a refrigeration system using a quality decay value expressing an expected decay rate in quality of the products being refrigerated, and which depends on the temperature of air present in the refrigeration system. The quality decay value is obtained using a mathematical model reflecting one or more physical and/or biological processes in the products. Prevents or reduces the quality degradation of the products in terms of shelf life, appearance or tastiness. Furthermore, a method for controlling the temperature in such a way that effects of scheduled events, such as temperature increase during defrosts, can be compensated prior to the event.
Abstract:
An actuator assembly for actuating a valve includes an extensible bellow having an open end and a closed end, a stem operable to contact the closed end and to actuate a stopper mechanism, and a driver configured to move the bellow. The movement of the bellow effects movement of the stem to actuate the valve. In one embodiment, the driver acts to compress the bellow, the compression causing movement of the stem to open the valve. The bellow may be hermetically sealed to the valve housing, thereby allowing a higher range of fluid pressures.
Abstract:
A composite for a transducer facilitates an increased actuation force as compared to similar prior art composites for transducers. In accordance with the present invention, the composite also facilitates increased compliance of the transducer in one direction and an improved reaction time as compared to similar prior art composites for transducers, as well as provides an increased lifetime of the transducer in which it is applied.
Abstract:
The invention concerns a heating and cooling mat (1) with a carrying sheet (2) having a top side (9) and a bottom side (11), and at least one heating and cooling unit (5) located on the carrying sheet (2), an adhesive being located on the bottom side (11) of the carrying sheet (2). It is endeavoured to improve the handling properties of the heating and cooling mat. For this purpose, the adhesive is located on a double-sided adhesive tape (12), which is fixed on the bottom side (11) of the carrying sheet (2), the adhesive on the bottom side of the adhesive tape (12) being covered by the top side of the carrying sheet (2) and the adhesive tape (12) bonding with the top side of the carrying sheet (2) in the rolled up state of the heating and cooling mat (1).