The invention relates to a heating system (200) for heating of a fluid. The heating system comprises a supply connection (201) in fluid communication with a supply of fluid to be heated. It further comprises a structured body (108) arranged for heating of the fluid during use of the heating system. The structured body comprises a macroscopic structure (21) of electrically conductive material, the macroscopic structure comprising at least one channel (22) through which the fluid can flow. The heating system further comprises at least two conductors (103,114) configured to electrically connect the structured body to at least one electrical power supply. The at least two conductors are electrically connected to the structured body at a first end (204) and at a second end (205), respectively, of a conductive path within the structured body. The structured body is configured to direct an electrical current to run along the conductive path from the first end to the second end thereof. The electrical power supply is configured to heat at least part of said structured body to a temperature of below 400° C. by passing an electrical current through said structured body during use of the heating system.

A heating element comprises a main body having a three-dimensional matrix with an open structure including openings and internal voids, cavities and/or pores extending throughout the main body. The three-dimensional matrix is provided as a lattice having a repeating unit cell extending in three directions. The present heating element is adapted for maximised surface area so as to provide an effective and efficient thermal energy transfer medium.

A tankless water heater comprising a bare wire heating element is disclosed which is connected to an electronic temperature control system. At least one sensor is furthermore connected to the electronic temperature control system. A fluid heating chamber is made of insulating non conductive material wherein the heating element is located. At least one switch is connected to at least one bare wire heating element and to a phase of an AC line. An electrode system and an electronic detecting circuit are interconnected. The electrode system is arranged in a fluid channel, in a short distance from the bare wire heating element which acts like electrode 1. The electrode 2 of the electrode system is made from a conductive tube material hydraulically connected to a throttle valve made from non conductive material to insulate the electrode 2 from the grounded collector. The electrode 2 is electrically connected to a electronic control system via a conductive material.

A heating block including a heating block body which receives/guides a liquid medium, an electric heating element arranged in the cavity for heating the medium via electric current, a semiconductor switch for controlling the electric current flowing through the heating element to control a heating power of the heating element, and a closure piece for closing an opening in the heating block body to the cavity element. The semiconductor switch is electrically and thermally conductively connected to the closure piece via first connection terminal to electrically connect the first connection terminal to the heating element via the closure piece, and to thermally connect the first connection terminal to the medium via the closure piece. The semiconductor switch is directly connected to a control board by a second connection terminal so that the semiconductor switch is spatially arranged and mechanically connected directly between the control board and the connection piece.

Disclosed is a cleaning device for a washing apparatus arranged in a vehicle, comprising a housing with a chamber which is formed in the housing, is configured to be filled with cleaning fluid and is hydraulically connectable to at least one spray nozzle for the cleaning fluid, and with at least one heatable heating wire protruding at least in sections into the chamber. To obtain high functional reliability even at low temperatures and to permit particularly rapid and reliable deicing, a heat-conducting element is arranged in the chamber to enlarge a heat-transferring convection surface, said heat-conducting element absorbing the heat from the heating wire, and being at least partially, and preferably completely, surrounded by the cleaning fluid.

A water heater system includes an intermediate water heater having a storage tank in which water is initially received at an initial temperature. The intermediate water heater is controllable to heat the water to an intermediate temperature that is higher than the initial temperature. The water heater system also includes at least one point-of-use water heater coupled to the intermediate water heater for receiving the water from the intermediate water heater after the water has been heated to the intermediate temperature. The point-of-use heater is controllable to heat the received water to a point-of-use temperature, the point-of-use temperature being higher than the intermediate temperature.

A water heater insert device positioned within an electrical showerhead or as a standalone liquids heating device. The water heater insert optimizes heat transfer by channeling water through a channel of a spiral or zigzag form where a deployed heating element supplies thermal energy. The channel maximizes water contact while minimizing the space. A temperature limiter adds protection against scalding.

A heating device comprises an inner tank, an outer shell, and a heater. The inner tank is received in the outer shell. An inner tank opening and an inner tank inlet are each in communication with an inner tank chamber. An outer shell opening corresponds in position to the inner tank opening. An outer shell inlet and the outer shell opening are each in communication with an outer shell chamber. An outer shell through-hole corresponds in position to an inner tank outlet. One end of an electrical heating tube of the heater is disposed at a fixing portion and electrically connected to a control circuit. The other end of the electrical heating tube is received in the inner tank chamber. The control circuit includes an electric wire for communicating with the outside. A guide channel is formed between the inner tank and the outer shell.

A heater system includes a heater bundle and a power supply device. The heater bundle includes a plurality of heater assemblies and a plurality of power conductors. The heater assembly includes a plurality of heater units, each heater unit defining at least one independently controlled heating zone. The power conductors are electrically connected to each of the independently controlled heating zones in each of the heater units. The power supply device is configured to modulate power to each of the independently controlled heater zones of the heater units through the power conductors.

A hose nozzle assembly which is capable of heating water comprising an internal heating chamber with at least one heating element. The hose nozzle assembly is able to heat water from a common garden hose with the ability to control both flow rates and temperature.