The present invention relates to a thermostat system, to a thermostat unit, as well as to a method for managing power supply in a thermostat unit. A thermostat unit is connected between a power supply and a resistive heating element. Input power is received at the thermostat unit. A temperature difference is calculated between a target temperature and a current temperature. The input power is controlled by operating a power supply module between a heating mode wherein in the input power is channeled to the output port for feeding the resistive heating element based on the temperature difference and a regenerative mode wherein the input power is channeled to an energy storage device for charging said energy storage device in order to supply power therefrom to electronic components of the thermostat unit.

A method for fire prevention in a sauna includes the steps of monitoring a rise of heat radiation from a sauna heater, comparing the rise of the heat radiation to a normal set heat radiation rise curve, determining whether the rise of the heat radiation of the sauna heater deviates from a normal rise in heat radiation, and

switching the sauna heater off if the rise of the heat radiation deviates from the normal rise. The invention is further directed to a system for carrying out said method.

A networked speaker device includes a sealed housing and an Ethernet port in the housing for receiving power and audio data from a network router via an Ethernet cable. A power supply subsystem in the housing manages the power received at the Ethernet port. A microprocessor subsystem, powered by the power supply subsystem, receives and processes the audio data to generate output audio signals. A digital audio amplifier. powered by the power supply subsystem, amplifies the output audio signals to drive a speaker driver to render an audio output. The device also includes at least one heater resistor in the housing powered by the power supply subsystem. The at least one heater resistor is controlled by the microprocessor subsystem to automatically heat the interior of the housing when temperature inside the housing falls below a given temperature.

A line voltage thermostat having a multiple heatsink switch. A total switch may have a semiconductor switch mounted on each heatsink of the multiple heatsink switch. The semiconductor switches of the respective heatsinks may be connected in parallel to represent the total switch. Each of the two or more heatsinks, having a semiconductor switch for switching, and in total conveying the same power as one equivalent switch with one total heatsink, may have higher maximum operating temperatures and higher thermal resistances than twice the thermal resistance of the one total heatsink. The two or more heatsinks may be situated within a housing of the line voltage thermostat, and be easier to distribute in the housing to achieve an efficient layout of a display and control buttons for the thermostat.

A heating system having: i) at least one resistive heat element; ii) at least two terminals for receiving a grid voltage from a power grid, and iii) a controller for being connected to the terminals for receiving the grid voltage, the controller connected to the at least one resistive heat element and being configured for controlling a load current through the at least one resistive heat element, wherein the controller is configured controlling the load current though the at least one resistive heat element. The controller comprises an FCFO-bidirectional power switch connected in series with the at least one resistive element for controlling the load current that is received from the power grid. A method is for controlling the load current through the at least one resistive element, which applies a certain algorithm to avoid inrush current, shortens the length of a cold start and solves problems such as EML.

A one-piece heater rack includes a number of arrays of attachment nodes and a surrounding peripheral structure. The attachment nodes are configured to allow the attachment of ceramic supports, the ceramic supports designed to hold open type coil electrical resistance heating elements that make up of a heater assembly using the heater rack. The attachment nodes allow attachment of the ceramic supports from above and below the heater rack for ease of installation. The heater rack also includes other features that providing mounting support for other heater assembly elements like terminals, thermostats, temperature limit switches, and air flow control over and through the heater using the peripheral structure, the arrays of attachment nodes or combinations thereof.

A floor panel assembly includes an insulating layer which protects a sheet heater, first and second structural layers, and a honeycomb layer for support. The floor panel assembly allows for heating of the cabin of an aircraft without mechanical damage to the sheet heater.

The grounded modular heated cover is disclosed with a first pliable outer layer and a second pliable outer layer, wherein the outer layers provide durable protection, an electrical heating element between the first and the second outer layers, the electrical heating element configured to convert electrical energy to heat energy, a heat spreading layer, and a thermal insulation layer positioned above the active electrical heating element. Beneficially, such a device provides radiant heat, weather isolation, temperature insulation, and solar heat absorption efficiently and cost effectively. The modular heated cover quickly and efficiently removes ice, snow, and frost from surfaces, and penetrates soil and other material to thaw the material to a suitable depth. A plurality of modular heated covers can be connected on a single 120 Volt circuit protected by a 20 Amp breaker. The modular heated covers are grounded for safety using the conductive heat spreading layer.

A heating unit and a heating system are provided that utilize computational and/or processing components to generate and deliver varying levels of heat. The disclosed heating unit/system beneficially captures heat that is a byproduct of other activities, e.g., computing activities, for heating purposes. In addition, the disclosed heating unit/system may be connected to a broadband connection and the processing capabilities of the disclosed unit/system may be selectively used to engage a computing resource share market, e.g., a cryptocurrency mining system, to generate heat at a desired level while simultaneously generating revenue based on resource share market economies. Related methods for heat generation are also provided.

Systems and methods are provided for controlling infrared radiation (IR) sources of a sauna including tuning IR wavelength-ranges and radiated power-levels of IR sources, and directing IR to locations on a user's body. In one illustrative embodiment, a sauna may be provided having adjustable heat sources to emit IR at any wavelength resulting in a desirable radiation treatment for the sauna user. In another illustrative embodiment, a method is provided for tuning IR sources in a sauna.