An electric heating system for heating a fluid flow, the system comprising: a plurality of annular walls composed of an electrically conductive material, the walls being nested to define a plurality of annular flow channels which are serially arranged concentrically about a longitudinal axis, wherein the plurality of annular walls are mechanically connected together whereby adjacent flow channels have opposite fluid flow directions and are connected at adjacent ends of the respective channels to define an alternating serpentine flow path which has an input end at the fluid input and an output end at the fluid output, wherein the input and output ends are respectively located at radially outer and radially inner positions relative to the longitudinal axis.

An electric heating system for heating a fluid flow, the system comprising: a plurality of annular walls composed of an electrically conductive material, the walls being nested to define a plurality of annular flow channels which are serially arranged concentrically about a longitudinal axis, wherein the plurality of annular walls are mechanically connected together whereby adjacent flow channels have opposite fluid flow directions and are connected at adjacent ends of the respective channels to define an alternating serpentine flow path which has an input end at the fluid input and an output end at the fluid output, wherein the input and output ends are respectively located at radially outer and radially inner positions relative to the longitudinal axis.

The present invention relates to a film type heater and an electroconductive thin-film. The film type heater includes a substrate; and a heat emitting layer that is formed on the substrate and contains a tin oxide doped with one or more metalloids and one or more post-transition metals.

The present invention relates to a film type heater and an electroconductive thin-film. The film type heater includes a substrate; and a heat emitting layer that is formed on the substrate and contains a tin oxide doped with one or more metalloids and one or more post-transition metals.

A heating cartridge with a thermally conductive tube which can be immersed in a thermodilatable material of a thermostatic member. Having a cylindrical body extending axially via a flare; internal electric heating; a base of a plastic material, secured to the tube by overmolding the flare, supporting an electrical connection between the heater and an external current source, and is suitable to be received in a casing of the valve housing. A seal is attached to the base and has a first portion pressed radially against the housing in the casing so as to seal the interior of the casing. In order to improve the sealing of said cartridge, the seal also includes a second portion, which is separate from the first portion and which is pressed radially against the cylindrical body of the tube to seal the overmolding interface between the flare of the tube and the base.

A heating cartridge with a thermally conductive tube which can be immersed in a thermodilatable material of a thermostatic member. Having a cylindrical body extending axially via a flare; internal electric heating; a base of a plastic material, secured to the tube by overmolding the flare, supporting an electrical connection between the heater and an external current source, and is suitable to be received in a casing of the valve housing. A seal is attached to the base and has a first portion pressed radially against the housing in the casing so as to seal the interior of the casing. In order to improve the sealing of said cartridge, the seal also includes a second portion, which is separate from the first portion and which is pressed radially against the cylindrical body of the tube to seal the overmolding interface between the flare of the tube and the base.

A towel drying assembly for drying a wet towel or dish rag includes a housing that has a convex top thereby facilitating a towel to be draped over the housing. The housing has a plurality of apertures each extending into an interior of the housing. The plurality of apertures passes air therethrough thereby facilitating the towel to be in thermal communication with the interior of the housing when the towel is draped over the housing. A heating element is positioned within the housing such that the heating element is in thermal communication with the interior of the housing. The heating element heats the interior of the housing when the heating element is turned on. In this way the plurality of apertures can communicate heated air to the towel for drying the towel when the towel is draped over the housing.

A heating device including a substrate, at least one heating layer on the substrate, and a power supply electrically connected to the at least one heating layer. The heating layer includes graphene nanomaterials. To form a layer of heating material, a liquid including graphene nanomaterials is applied to the substrate. The liquid is dried to form the at least one heating layer on the substrate. A first electrode and a second electrode are attached to the substrate. A power supply is electrically connected to the at least one heating layer on the substrate via the first electrode and the second electrode. The heating layer produces heat in the presence of power applied to the electrodes.

A heating device including a substrate, at least one heating layer on the substrate, and a power supply electrically connected to the at least one heating layer. The heating layer includes graphene nanomaterials. To form a layer of heating material, a liquid including graphene nanomaterials is applied to the substrate. The liquid is dried to form the at least one heating layer on the substrate. A first electrode and a second electrode are attached to the substrate. A power supply is electrically connected to the at least one heating layer on the substrate via the first electrode and the second electrode. The heating layer produces heat in the presence of power applied to the electrodes.

A tankless water heater for use in a recreational vehicle uses one or more water chambers, each with a heating element, through which cold water flows and is heated. The system is connected to the alternating current of the recreational vehicle and controls the water temperature by sending the current through one or more TRIACs that change the firing angle of the current in order to increase or decrease power flow to the heating elements depending on the sensed temperature of the outflowing water that is compared against the selected temperature or to match the amount of power flow desired to be sent to the heating elements. The user selects whether to control the unit via a temperature selection or an amount of power flow selection.