Abstract: A method for filling a cooling circuit of a motor vehicle with a coolant may include filling the cooling circuit with ion-free water in a water filling operation, leaving the ion-free water in the cooling circuit for a water duration of action in a water operation of action, displacing the ion-free water out of the cooling circuit via filling the cooling circuit with a passivating agent in a passivating operation, rinsing the cooling circuit with ion-free water such that the ion-free water at least dilutes the passivating agent in the cooling circuit and a liquid including at least one of the ion-free water and the passivating agent remains in the cooling circuit in a rinsing operation, displacing the liquid out of the cooling circuit via filling the cooling circuit with the coolant in a coolant filling operation, and/or fluidically sealing the cooling circuit towards an outside in a sealing operation.

Abstract: A heat exchanger for a cooling circuit which is flowed through by an aqueous temperature-control fluid may include at least two channel bodies, through which a flow path of the temperature-control fluid leads; at least one tank, which has a base and through which the flow path leads; and at least one ion exchange structure having ion-exchanging fibres for reducing ions in the temperature-control fluid. The at least two channel bodies may be fluidically connected with the at least one tank on a longitudinal end side via the base of the at least one tank.

Abstract: A method is provided for passivating an aluminum surface. According to the method, the aluminum surface is provided with a flux. A passivation solution is subsequently applied to the aluminum surface, such that a passivation layer is created by reaction of the passivation solution with the aluminum surface, which is provided with the flux.

Abstract: The present invention relates to a method for filling a cooling circuit (2) of a motor vehicle (3) with a coolant (4). A simple filling of the cooling circuit (2) with coolant (4) and an increased operational safety are achieved in that the cooling circuit (2) is initially filled with ion-free water (13) and thereafter with a passivating agent (16), and wherein thereafter the cooling circuit (2) is rinsed with ion-free water (13) and subsequently filled with the coolant (4). The invention, furthermore, relates to a system (1) for filling a cooling circuit (2) of a motor vehicle (3) with coolant (4).

Abstract: A heat exchanger for a cooling circuit which is flowed through by an aqueous temperature-control fluid may include at least two channel bodies, through which a flow path of the temperature-control fluid leads; at least one tank, which has a base and through which the flow path leads; and at least one ion exchange structure having ion-exchanging fibres for reducing ions in the temperature-control fluid. The at least two channel bodies may be fluidically connected with the at least one tank on a longitudinal end side via the base of the at least one tank.

Abstract: A cooling device for cooling power electronics may include a heat-dissipating cooling plate and a contacting surface arranged thereon. The contacting surface may include multiple conductors arranged thereon configured to fix and contact a power electronics. The contacting surface may be electrically insulated from the heat-dissipating cooling plate. Between the heat-dissipating cooling plate and the contacting surface at least one organic intermediate layer may be arranged. The at least one organic intermediate layer may be fixed to the heat-dissipating cooling plate in a firmly bonded manner.

Abstract: The invention relates to a thermal spraying method, in particular for coating a surface by means of a plasma beam, using a shaped plasma beam, wherein a first plasma beam by means of at least one second plasma beam is controlled and/or shaped, wherein the second plasma beam at least partially and at least temporarily penetrates the first plasma beam.

Abstract: A method for quantitatively determining flux material residues remaining on a heat exchanger after a preceding soldering process is provided. To this end, a fluid is applied to the heat exchanger, wherein the remaining quantity of flux material on the heat exchanger after the preceding soldering process is derived from the concentration of soldering agent in the fluid.

Abstract: A method for quantitatively determining flux material residues remaining on a heat exchanger after a preceding soldering process is provided. To this end, a fluid is applied to the heat exchanger, wherein the remaining quantity of flux material on the heat exchanger after the preceding soldering process is derived from the concentration of soldering agent in the fluid.

Abstract: The invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, having at least one surface which is impinged on by a medium, in particular exhaust gas, is made from metal, in particular aluminum or stainless steel, and is provided with a coating. In order to improve the properties of the coating, according to the invention, the coating comprises a coating material based on nanotechnology.

Abstract: The invention relates to a heat exchanger, particularly an evaporator for air conditioners in motor vehicles, having a number of heat transfer surfaces made of metal, in particular, aluminum or aluminum compounds. The aim of the invention is to provide this heat exchanger with a surface coating that is improved compared to the prior art. To this end, a number of layers are applied to its heat transfer surfaces, and nanoparticles are used for the coating.

Abstract: The invention relates to a heat exchanger provided with a hydrophilic surface coating (12) comprising a gel produced by a sol-gel method.

Abstract: The invention relates to a heat exchanger provided with, a hydrophilic surface (2) comprising nanoparticles (3), coated and/or grafted nanoparticles consisting of or containing oxides.