Abstract: The present disclosure relates to the field Quantum Key distribution (QKD) and discloses an apparatus (100) and method (300) for adjusting the phase modulator's modulating signal time reference in a phase-based QKD system. The QKD system comprises a pulse generator (10) that generates optical pulses and a phase modulator (20) that modulates the phase of each of the pulses. The apparatus (100) comprises abeam splitter/tap (112), a 1-bit delay interferometer (110), two photodetectors (106,108), and a processing device (104). The splitter feeds the phase modulated optical pulses to the interferometer (110). Two photo detectors are connected to the constructive and destructive output legs (110a,110b) of the interferometer (110). The photo detectors' output are then converted to digital signals and fed to the processing device (104).

Abstract: Disclosed is a device (1) used for exchanging and delivering heat, especially for a motor vehicle comprising an apparatus for delivering an especially gaseous medium, a heating apparatus (5) for heating at least one portion of the gaseous medium, at least one space (7) that is disposed downstream of the heating apparatus relative to the direction of flow of the gaseous medium, at least two ducts (12a, 12h, 12c, 12d) for the gaseous medium, which originate within said space and extend into at least two air conditioning zones of the interior of the motor vehicle. A control mechanism which regulates the quantity of the medium flowing through the duct is provided inside at least one of the ducts while the heating apparatus is provided with at least two, preferably a plurality of, throughput devices for a second medium, at least two of said throughput devices being designed in a different manner.

Abstract: A four zone conditioned air unit for use in a motor vehicle providing heating or cooling to a plurality of regions having relatively independent temperature setting. The structure provides compact, flexible and convenient temperature conditioning for each region.

Abstract: A conditioned air unit for use in a motor vehicle providing heating or cooling to a plurality of regions having relatively independent temperature setting. The structure provides compact, flexible and convenient temperature conditioning for each region.

Abstract: A conditioned air unit for use in a motor vehicle providing heating or cooling to a plurality of regions having relatively independent temperature setting. The structure provides compact, flexible and convenient temperature conditioning for each region.

Abstract: A coupling element connects a connection piece with an insertable end of a connection tube having a toroidal flange for contacting the connection piece in the tube inserting direction. A plug-in fork can be inserted into the coupling element to releasably secure the inserted tube end area against the tube inserting direction, with the tube torus held in place by the plug-in fork. For this purpose, pairs of plug-through openings are provided on side walls of the connection piece opposite one another, so that one prong of the plug-in fork can be inserted into each opening. Inserting bevels are assigned to at least a portion of the plug-through openings, which inserting bevels are shaped such that they cause a forced movement of the plug in fork in the tube inserting direction during its insertion in the plug-in fork inserting direction.

Abstract: A tube connection for a water box of a motor vehicle heat exchanger is disclosed. A connecting sleeve is provided which is a component which is separate from the water box and is provided with a connecting area which can be inserted into a corresponding opening of the water box.

Abstract: A heat exchanger (1) with at least one heat-exchange tube (11) which is held at the end in an end piece (3) such that the joint is liquid- and gas-tight. The end piece (3) has an opening for each tube to which it is connected, allowing the heat-exchange fluid to pass through from the tube (11) into a conduit box and in the opposite direction, a sleeve-like connection socket (8) being located in the region of each opening. The connection socket (8) comprises a cylindrical slot (9) coaxial to the opening and open at the heat-exchange tube end, forming an inner (14) and outer (15) annular wall. The end of the heat-exchange tube (11) is pushed into the slot. A section of the outer annular wall (15) adjacent to the heat-exchange block is longer than the corresponding section of the inner annular wall (14).

Abstract: A pipe connection arrangement for a water tank of a heat exchanger of a motor vehicle heater includes a pipe equipped with a collar at a pipe end for inserting into a connecting sleeve at the water tank. The pipe is provided with a seal on a first side of the collar, with the seal being pressed tightly into a recess in the connecting sleeve. A holding clamp rests on the other side of the collar facing away from the seal with the holding clamp being formed asd a U-shape. The clamp is developed in such a way that its U-bracket-shaped part rests tightly against the pipe exterior. This design results in the load transmission being evenly transmitted over a relatively large surface area. The sleeve includes openings formed as slots for receiving the clamp, with a reinforcing web provided in the center of the slots. The clamp is secured by another gripping part that projects from the bracket part and engages behind a reinforcing web of the connecting sleeve.

Abstract: A motor vehicle heat exchanger for independently heating different passenger areas comprising first and second tube/fin block units for transferring heat from coolant flowing through tubes thereof to air flowing therethrough to first and second passenger areas, respectively. Common upper and lower coolant reservoir tanks supply coolant to both tube/fin units and receive coolant returning therefrom respectively. Intake tubes extend through a common gap between the first and second tube/fin units to supply heated coolant to the lower cooling tank.