An electric radiator is provided. The electric radiator includes: a housing provided with an air channel cover therein; a heating assembly disposed in the housing and defining a natural convection air channel with the air channel cover, an air supply inlet being formed at a first end of the natural convection air channel and an air supply outlet being formed at a second end of the natural convection air channel above the air supply inlet, air in the natural convection air channel being heated by the heating assembly to form a natural convection in the natural convection air channel; a mesh hood mounted onto a front surface of the housing and covering the heating assembly and the air supply outlet; a first temperature limiter mounted onto the heating assembly and adjacent to the air supply outlet in an up-down direction.

A temperature controller is provided, which includes a first temperature sensor, a heater, a logic circuit, a watchdog circuit and a second temperature sensor. The first temperature sensor may detect the environmental temperature. The heater may be turned on after the temperature controller is turned on. The logic circuit may turn on the watchdog circuit after the environmental temperature is higher than the first temperature for the watchdog circuit to keep detecting whether the main circuit of an electronic device is turned on until the main circuit is turned on. The second temperature sensor may be turned on after the main circuit is turned on and then detect the environmental temperature. The logic circuit may turn off the heater after the second temperature sensor detects the environmental temperature is higher than a second temperature, or turn on the heater when the environmental temperature is lower than a third temperature.

A column-conditioning enclosure includes a column chamber adapted to hold one or more chromatography separation columns. A duct system provides an airflow path around the column chamber such that the one or more chromatography separation columns held within the column chamber are isolated from the airflow path. An air mover disposed in the airflow path generates a flow of air within the duct system. A heat exchanger system disposed in the airflow path near the air to exchange heat with the air as the air flows past the heat exchanger system. The air circulates through the duct system around the column chamber, convectively exchanging heat with the column chamber to produce a thermally conditioned environment for the one or more chromatography separation columns held within the column chamber.

Apparatus and methods are disclosed for controlling a cooling ventilation fan after the thermostat call for cooling has ended by providing a variable fan-off delay time based on cooling system parameters including but not limited to the cooling system operating time, duration of the thermostat call for cooling, relative humidity, temperature split, thermostat temperature rate of change, or thermostat temperature reaching a minimum inflection point or crossing a fixed or variable thermostat differential or differential offset. Apparatus and methods are disclosed for controlling a heating ventilation fan after the thermostat call for heating has ended by providing a variable fan-off delay time based on heating system parameters including but not limited to the heating system operating time, duration of the thermostat call for heating, temperature rise, thermostat temperature rate of change, or thermostat temperature reaching a maximum inflection point or crossing a fixed or variable thermostat differential or differential offset.

The invention relates to an electric fluid heating device (1) comprising: at least one fluid inlet (7), at least one fluid outlet (11), at least one heating element (13), at least one first temperature sensor (21) for measuring the temperature of said at least one heating element (13), and a control module (15) of the at least one heating element (13). According to the invention, the device (1) comprises at least a second temperature sensor (23) for measuring the temperature of the fluid at the at least one outlet (11), and the control module (15) comprises at least one processing means (17, 19, 35) for: using the temperature information (T.sub.21, T.sub.23) from the temperature sensors (21, 24), and for generating a command for the at least one heating element (13) according to the temperature information (T.sub.21, T.sub.23). The invention also relates to an associated heating circuit and method for managing the temperature.

An electric fireplace (410) includes a fireplace housing (412) and a heater assembly (426) that is configured to generate heated air. The heater assembly (426) is configured to be installed substantially within the fireplace housing (412). The heater assembly (426) includes a heater body (445), a first grill cover (448) that is selectively couplable to the heater body (445), and a second grill cover (548) that is alternatively selectively couplable to the heater body (445). The first grill cover (448) has a first cover length (468), and the second grill cover (548) has a second cover length (568) that is different than the first cover length (468). The heater assembly (426) is selectively positionable within a cabinet (311) having a structural opening (311A), and a center shelf (360) that defines at least a portion of an upper side (311U) of the structural opening (311A). The heater assembly (426) is installed substantially adjacent to the center shelf (360).

A terminal device for connecting a heating apparatus with an electricity supply, in particular for a tubular heating apparatus for household appliances, wherein the heating apparatus includes at least one electric resistance heating element, comprises a mounting and reception section arranged for being electrically connected with the electric resistance heating element of the heating apparatus, a connector section arranged for being electrically connected on its one end side with an electrical power supply and on its other end side with the mounting and reception section, and a thermal fuse unit for detecting an excess temperature of the heating apparatus, which is in heat transfer contact with at least the mounting and reception section and which is connected in the electric supply circuit for supplying the electric resistance heating element of the heating apparatus with electricity. The mounting and reception section comprises a cavity for receiving the thermal fuse unit.

The invention relates to a hot-air fan including a fan device for generating an air flow, a heating device for heating the air flow, and a control unit connected to the fan device and to the heating device. In this process, the control unit is designed to control the fan device in such a manner that, when the heating device is switched on, the fan device generates a starting air flow that is reduced to an operating air flow. The invention also relates to a method for operating the hot-air fan, including the steps of switching on the heating device and generating a starting air flow that is reduced to an operating air flow.

The present disclosure relates to an integrated modulating forced air electric heater with temperature control protection used to limit the electric heater output to protect the forced air electric heater components from overheating. The integrated modulating forced air electric heater with temperature control protection may be used to prevent the electronic heating element from overheating. The integrated modulating forced air electric heater with temperature control protection may also include protection to prevent a switch from overheating where the switch is used to switch power to the electric heating element.

A snow, ice and debris removal device is disclosed. The multipurpose device includes a handle, a cylindrically-shaped forced air blowing system and a plurality of controls. The cylindrical shaped forced air blowing system features a front opening for expelling cool or heated air, which is adjustable via a switch to suit the application for which the device is being used. The forced air blowing system comprises an internal induction heating/cooling coil that heats or cools the air expelled through the system. When the switch is set to hot air mode, the device expels a stream of heated air which the user can easily direct at snow and ice accumulations on, for example, a sidewalk, driveway, parked vehicle, etc. or to dry a surface. Alternatively, when the cool air mode is selected, the device expels a stream of cool air that the user can use to displace leaves and other debris.