Abstract: The invention relates to a method for producing a fluid conduit, in particular a fluid conduit for a CO2 refrigerating plant. The aim of said invention is to develop a quick and inexpensive method. For this purpose, several pipes (5-9) are simultaneously supplied by means of at least one roller (11) which is provided with peripheral grooves (14) and are helically wound in a parallel direction with respect to each other, wherein each pipe (5-9) is guided along a helical line and the helical lines of all pipes (5-9) are parallel to each other.

Abstract: A method of analyzing a refrigeration system (1) comprising at least one compressor (4), at least one condenser (5) and at least two refrigeration entities (2), each comprising at least one evaporator (9). Based on information relating to the gas production by the evaporators (9) it is determined whether or not two or more evaporators (9) are running in a synchronized manner, i.e. are switching between an active and an inactive state at least substantially simultaneously. In case two or more evaporators (9) are running in a synchronized manner, the refrigeration system (1) may be controlled in order to desynchronize the evaporators (9). This may, e.g., be done by changing a cut-in temperature and/or a cut-out temperature for one of the corresponding refrigeration entities (2). Synchronization causes undesired variations in the suction pressure, and preventing synchronization therefore results in a more appropriate control of the refrigeration system (1). Reduces wear on the compressors (4).

Abstract: A multilayer composite includes at least two composites, each composite having a film and an electronically conductive layer. Several composites are laminated to provide an increased conversion between mechanical and electrical energies not only due to the multiplication of the effect of each layer, but also due to the fact that the multilayer structure itself renders the multilayer composite more rigid. In addition, the multilayer structure facilitates application of an electrical field over thinner portions of the structure, thereby requiring much less potential difference between electrodes.

Abstract: A method for providing a multilayer composite includes the steps of providing a first composite comprising a film of a dielectric material with a front surface and an opposite rear surface, the front surface comprising a surface pattern; depositing an electrically conductive layer onto the surface pattern; providing a second composite comprising a film with a front surface and an opposite rear surface, the front surface comprising a surface pattern; depositing an electrically conductive layer covering at least a portion of the surface pattern; arranging the first composite on the second composite; and fixating the position of the first composite relative to the second composite.

Abstract: The invention concerns a plunger piston compressor (1) for refrigerants, particularly for CO2, with a case-like housing, having a compressor block (2) with a compression section comprising a cylinder (13) as first housing element and a bottom part (3) as second housing element, the compressor block (2) and the bottom part (3) being connected with each other, and with a motor (25) with a drive shaft (23) located in the inner chamber (17). It is endeavoured to provide a high-pressure refrigerant compressor with a simple design, which is cost effective in manufacturing. For this purpose, it is ensured that the drive shaft (23) is only supported on one side of the motor (25).

Abstract: A method for regulating a most loaded circuit of a refrigeration system is provided. Each circuit includes at least one case and an EEPR valve. At least one controller communicates with the EEPR valves for receiving signals from the circuits corresponding to operating conditions for each circuit, and for issuing command signals to the EEPR valves and compressor. The operation of each circuit is monitored and a load signal is calculated for each circuit. The load signals for each circuit are compared and the most loaded circuit is determined. The EEPR valve of the most loaded circuit is adjusted to be approximately 100 percent open and a suction pressure of the compressor is adjusted to move a circuit temperature of the most loaded circuit to a target temperature. The process of selecting and regulating the most loaded circuit is repeated after a predetermined period of time.

Abstract: A pressure transmitter includes a body part and a sensor unit which are joined hermetically. Adjacent to the hermetic joint, there is a gap between adjacent surfaces of the body and sensor unit, which gap facilitates an easier assembling procedure and which facilitates transportation of gases away from the hermetic joint zone when the body and sensor unit is assembled e.g. by welding.

Abstract: The invention concerns a cooling ceiling installation with at least one heat exchanger, a valve, which controls the flow of a heat transfer medium through the heat exchanger and a mechanical control device, and a monitoring device. It is endeavored to provide a simple manner of avoiding a condensate formation on the cooling ceiling installation. For this purpose, the monitoring device has an adjustment drive, which mechanically displaces the control device to a state, in which the valve is closed.

Abstract: The invention concerns a water-hydraulic machine with at least two mutually movable parts, of which one has a surface of a plastic material with friction-reducing properties. In such a machine it is desired to enable the use of demineralised water. For this purpose, it is ensured that a layer of a carbon-containing material is arranged between the plastics material and the other part.

Abstract: The present invention relates to apparatus for delivering a controlled or restricted flow of liquid and limiting bubble fragmentation at the inlet. This is achieved in flow restrictor with a flow channel having over most of its length a substantially constant, minimum hydraulic diameter D=4A/W wherein A is the minimum local cross-sectional area of the channel and W is the minimum local wetting perimeter of the channel, by smoothly widening the channel at its inlet such that: at distances z from the inlet face with 0<z<z1, the channel has a hydraulic diameter Dz?k*D wherein k?1.3; at distances z from the inlet face with z1<z<z2, the channel has a hydraulic diameter Dz with k*D?Dz?D; and at distances z from the inlet face with z2<z, the channel has a hydraulic diameter Dz with Dz?1.02D, except possibly for a similar widening of the channel at the outlet.

Abstract: A nozzle (100) for air-assisted atomizing of a liquid fuel comprises a fuel feed passage (110) and an air feed passage (114) and a swirling chamber (118) from which fuel and air may be passed to an exit orifice (126) for emerging a cone shaped spray. An air bypass passage (122) is provided for leading a fraction of the air flow in the air feed passage (114) past the swirling chamber (118) and to an air exit (124) arranged such with respect to the exit orifice (126) that, during operation of the nozzle, air emerging through the air exit (124) reduces depositing of residues of fuel on a downstream surface (130, 132, 136) of the nozzle element (108). Grooves or other flow-guiding elements may confer swirling or rotation of air in or downstream of the air feed passage (114) and/or the air bypass passage (122).

Abstract: An implant and a process of modifying an implant surface, which implant is in particular a hip implant, a tooth implant, a bone screw, fixation pin or a fixation nail (pin-fixation), comprising a metallic base body, which implant has a surface modified by a material containing a tissue-friendly metal, such as tantalum or niobium, for the formation of a surface modification where at least the tissue-friendly metal is alloyed with the surface and constitutes a uniform, diffusion-tight outer zone on the body, which outer zone has a higher ductility than the metallic base body in order to obtain a tissue-friendly implant with increased fatigue strength.

Abstract: A process for electrochemical deposition of tantalum on an article in an inert, non-oxidizing atmosphere, or under vacuum, in a molten electrolyte containing tantalum ions, comprising the steps of: immersing the article into the molten electrolyte heated to a working temperature, passing an electric current through the electrolyte to thereby deposit a tantalum coating on the article, wherein the process of tantalum deposition at least in an initial phase deposits pure ?-tantalum.

Abstract: The present invention relates to transducers for converting the spatial position of an object into an electrical signal, more specific to a novel position sensor which has advantages of simplicity, long-term stability and durability. According to the invention, a position sensor comprises at least one body of an elastomeric material, mounting means for mounting a first part of the body to a support, and movable means joined to a second part of the body at a distance from the first part, the movable means being movable to stretch a third part of the body located between the mounting means and the movable means. The sensor has opposed first and second surfaces on the third part, a first electrode on the first surface, and a second electrode on the second surface.

Abstract: The invention provides a method for simplifying manufacturing of electrical motors by making a sheet with a plurality of windings of a conductive wire. The sheet is rolled into a tubular body which is inserted into a tubular stator element made from a magnetically conductive material, and pressed into contact with an inner surface thereof. According to the invention, a part of an outer surface of a mandrel is covered with a non-adhesive layer and with an adhesive layer. Subsequently, a wire is coiled onto the mandrel in contact with the adhesive layer. Due to the non-adhesive layer, the coil may easily be removed from the mandrel, and due to the adhesive layer, the windings of the coil are kept in place during a subsequent flattening of the coil. Accordingly, disorder between the windings of the coil can be avoided and a motor with an improved capacity can be manufactured more easily.

Abstract: This invention relates to absolute pressure sensors with two bonded wafers containing a pressure sensing structure and forming a reference pressure chamber and a buffer chamber. Since the buffer chamber collects molecules, which permeate through a bonding interface between the two wafers, a raise in pressure of the reference chamber can be avoided. The sensor is therefore more resistant to pressure equalisation between the pressure chamber and the pressure of the surroundings, i.e. the sensed pressure and repetitive recalibration of the sensor can be avoided.

Abstract: A liquid fuel burner system and a liquid fuel supply unit (101) for the liquid fuel burner (106) of the system are disclosed. The supply unit (101) comprises a liquid fuel feed pump (102), a compressor (104 and preferably also a motor (30) mounted on a common drive shaft (3). The system further comprises a modulatable liquid fuel metering device (103). The liquid fuel feed pump (102) is connectable to a liquid fuel conduit from a liquid fuel source, such as an oil tank. An outlet of the feed pump (102) is connected to an inlet of the liquid fuel metering device (103), which in turn is connectable to an atomizing nozzle (105) of the liquid fuel burner (106).

Abstract: The invention provides an indicator for indicating a pressure difference. The indicator has a reference pressure chamber with two flexible wall parts being influenced to deflect upon pressures P1 and P2. The deflection of the wall parts changes a distance between each of the wall parts and an inflexible wall part of the chamber and by inspecting the difference, a pressure difference between P1 and P2 can be determined. To enable visual inspection, the chamber can be filled with an optically detectable fluid and one of the wall parts could be transparent to allow visual reading by determining a colour of the fluid layer below the transparent part.

Abstract: The invention concerns a method for the optical analysis of a fluid, in which the fluid that has a first refractive index, is surrounded by an auxiliary fluid with a second refractive index, the first refractive index being larger than the second refractive index and light being sent through the fluid. It is endeavoured to obtain an encapsulation of the fluid in the auxiliary fluid at low cost. For this purpose, firstly the auxiliary fluid is led into a measuring channel, until it is filled, and then lead the fluid into the auxiliary fluid within the cross section with a flow speed, which generates a parabolic flow profile.