A smart electric heating device comprises a storage unit, a first heating unit, a second heating unit, a control unit and a first temperature sensing unit. With the first temperature sensing unit to obtain an ambient temperature, the control unit compares the ambient temperature with a maximum increased temperature and a set temperature for controlling the first heating unit and the second heating unit to actuate. In this way, each user can use hot water of sufficient temperature better.

A closed-loop temperature controller employing at least two sensors: a control temperature sensor and a safety sensor at the heat-transfer element. The heat-generating element is separated from the controlled mass/volume by a transport delay so that the mass or volume that is being heated or cooled is located in a vessel which is located remotely from the heat-transfer unit. Thermally conducting fluid flows through a conduit that connects the heat-transfer unit to the vessel. Upon fluid flow interruption or control sensor removal, the temperature controller quickly detects thermal runaway before the safety sensor has reached the critical temperature. In heated systems, the temperature controller will therefore minimize direct damage and/or overshoot damage caused by excessive heat. It will also maintain the heater's output at an elevated, but non-damaging level to enable a fast recovery to the original setpoint temperature after the nonlinearity subsides.

A solar powered water heating assembly for supplying hot water from an exterior faucet or pipe includes a heating unit and a solar panel. The heating unit is integral to, or can be engaged to, a pipe that is in fluidic communication with water piping of a structure. The pipe extends externally from the structure. The heating unit is positioned to heat water flowing through the pipe. The solar panel converts electromagnetic radiation into an electrical current. The solar panel is operationally engaged to the heating unit and thus is positioned to power the heating unit to heat the water flowing through the pipe.

In a heat source apparatus in which an electric component having an electrode and an insulator is mounted on a side plate of a combustion box, in a state in which a packing is interposed between a flange portion of the insulator and the side plate, by fastening a clamp which overlaps with an outer surface of the flange portion, to the side plate, the temperature rise in the clamp is restrained.

Upper and lower water tubes constituting a part of a water jacket are disposed on the side plate on upper and lower sides of the position of mounting the electrode component. In case the upper and lower water tubes are disposed on an inside surface of the side plate, the upper and lower parts of the clamp are brought into contact with those disposed positions of the water tubes which are in upper and lower portions of the side plate and, in case the upper and lower water tubes are disposed on an outside of the side plate, the upper and lower parts of the clamp are brought into contact with the upper and lower water tubes.

In a heat source apparatus in which an electric component having an electrode and an insulator is mounted on a side plate of a combustion box, in a state in which a packing is interposed between a flange portion of the insulator and the side plate, by fastening to the side plate a clamp which overlaps with an outer surface of the flange portion, the packing is prevented from getting spread when compressed, thereby securing good sealing properties.

Upper and lower water tubes constituting a part of a water jacket are disposed on a side plate on upper and lower sides of the mounting position of the electrode component. In case the upper and lower water tubes are disposed on an inside surface of the side plate, upper and lower side edge portions of the packing are in contact with those upper and lower swelled-out portions formed in the one-side side plate which are swollen outward for respectively receiving into recesses the upper and lower water tubes; and that, in case the upper and lower water tubes are disposed on an outside surface of the side plate, upper and lower side edge portions of the packing are in contact with the upper and lower water tubes.

A water heater and a method of heating water utilizing microwave energy are disclosed. The water heater includes an inlet pipe connecting tubular coils. The tubular coils overlap over one another in a pyramid-shape structure. The tubular coils include a microwave generator positioned adjacent to them. The water heater includes an insulation member that positions around the tubular coils. The tubular coils connect to an outlet pipe including a pressure relief valve and a switch. The inlet pipe supplies cold water to the tubular coils. The microwave generator produces microwave energy directed at the tubular coils. The microwave energy penetrates into the tubular coils and heats up the water. The insulation member reflects back the microwave energy into the tubular coils and ensures there is no loss of energy. The hot water flows through the outlet pipe.

A fluid heating system including a fluid supply subsystem having a fluid heating device, a fluid output subsystem, and an intermediary fluid device. The fluid heating system also includes a control device for the fluid supply subsystem, a first temperature sensor, a second temperature sensor, and a control circuit coupled to the control device. The control device is configured to control one selected from a group consisting of the fluid heating device and an amount of water input to the intermediary fluid device. The first and second temperature sensors are configured to output first and second temperature signals, respectively. The control circuit is configured to generate a first control signal based on the second temperature signal, determine a multiplier, generate a second control signal based on the first temperature signal, and send a main control signal to the control device based on the first and second control signals.

An apparatus, method, and device for heating water using in-line magnetic induction. The heating system utilizes eddy currents created via one or more magnetic fields acting upon a stationary ferrous core. The device can be housed within an enclosure, which can in turn be connected to any existing water line, and can be connected to basic house voltage. During operation, cold water enters the enclosure, passes through the system, and leaves the system at a desired temperature setpoint greater than the initial inlet water temperature.

The invention is directed to a liquid heater for rapidly heating a liquid without overheating the liquid. The liquid heater comprises a liquid flow channel having a passage through which liquid flows, a heating part disposed outside the liquid flow channel, a heat reflecting part facing a heat radiating side of the heating part, and a cooling part through which a cooling medium flows adjacent a reverse side of a reflecting surface of the heat reflecting part for cooling the heat reflecting part. Radiant heat not absorbed in the liquid is reflected by the heat reflecting part. The heat reflecting part reflects radiant heat cooled by the cooling part so that the body of the liquid heater and peripheral members are maintained at a temperature not higher than a predetermined temperature to prevent overheating the liquid.

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.