A first unit (100) including a first member (110) of a releasable fastening arrangement (300) is presented. The releasable fastening arrangement (300) is arranged to provide a mechanical connection of the first unit (100) to a second unit (200), and an electrical connection of a first electrical circuit (120) included in the first unit (100) to a second electrical circuit (220) included in the second unit (200), when a male profile (115) of the first member (110) is inserted into a corresponding female profile (215) included in a second member (210) of the second unit (200). The mechanical connection is provided based one or more at least partially resilient latching arm members (117) of the male profile (115) engaging with one or more corresponding slots (217) of the corresponding female profile (215). The electrical connection is provided by contact between one or more first flexible conductors (124) arranged on a first flexible and electrically insulating layer (126) of the first electrical circuit (120) and one or more second flexible conductors (224) arranged on a second flexible and electrically insulating layer (226) of the second electrical circuit (220).

Disclosed is a heating device, including a housing, and an electrothermal film and a fan arranged in the housing, wherein the fan is located at a bottom of the electrothermal film, the fan is provided with an air inlet facing upwards and an air outlet facing forwards, and the housing is provided with a vent hole at a position corresponding to the air outlet.

Disclosed is a heating device, including a housing, and an electrothermal film and a fan arranged in the housing, wherein the fan is located at a bottom of the electrothermal film, the fan is provided with an air inlet facing upwards and an air outlet facing forwards, and the housing is provided with a vent hole at a position corresponding to the air outlet.

A heating mat is for use in a floor structure in an aircraft. The heating mat has a layered structure, with a plurality of layers firmly connected to one another, with a layer sequence. The layer sequence includes: a) a walkable protection layer having an unfinished floor covering material made of fiberglass-reinforced plastic or aramid fiber-reinforced plastic; b) an electrically conductive ground fault detection layer; c) an electrical insulation layer; and d) a flat electrical heating element having an electrically conductive heating varnish layer.

In a configuration, a protective enclosure for an animal and method of making is disclosed. The protective enclosure may include a floor system and a plurality of wall systems that may define an internal portion of the protective enclosure. A first electrical heating element may be disposed within the floor system or one of the wall systems. At least one wall electrical heating element may be disposed within the at least one wall system of the plurality of wall systems. The first electrical heating element and the at least one wall electrical heating element may be powered by electricity and may be configured to direct heat inwardly from the floor system or the at least one wall system to increase temperature inside the internal portion of the protective enclosure.

Systems, tools, and methods are presented that enable a circuit to introduce a random time delay before actuating a relay to start or stop a supply of electrical power to a heating element of a heating, ventilating, and air conditioning (HVAC) system. In one instance, the circuit includes a time-delay switch electrically connected to the relay. The time-delay switch has a random time delay before entering a closed state or open state. The relay is operable to start and stop a supply of electrical power to the heating element in response to the switch entering, respectively, the closed state and the open state. Other systems, tools and methods are presented. Other systems, tools and methods are presented.

A swingable solar electric heater comprises an electric heater structure including a head swing element, a heating element, a timer, a base, and a safety dump switch. The head swing element is used to swing back and forth to perform radiant heating within a fixed angle, the timer is connected to the heating element, and the safety dump switch is used to turn off the heating element when the tilt angle of the base exceeds a limit. A current capture device captures the image data of the scene where the electric heater structure is located to obtain and output the corresponding current scene image. An early warning control device is used to extract each pixel value of each pixel in the current scene image, to calculate the standard deviation in the current scene image, and to send a blockage warning signal when the standard deviation exceeds a limit.

A swingable solar electric heater comprises an electric heater structure including a head swing element, a heating element, a timer, a base, and a safety dump switch. The head swing element is used to swing back and forth to perform radiant heating within a fixed angle, the timer is connected to the heating element, and the safety dump switch is used to turn off the heating element when the tilt angle of the base exceeds a limit. A current capture device captures the image data of the scene where the electric heater structure is located to obtain and output the corresponding current scene image. An early warning control device is used to extract each pixel value of each pixel in the current scene image, to calculate the standard deviation in the current scene image, and to send a blockage warning signal when the standard deviation exceeds a limit.

A modular shelter for one or more persons, comprising at least one interior space which is closed off from at least one adjacent space by at least one circumferentially closed wall, a floor and a ceiling, wherein the circumferentially closed wall is penetrated by at least one closable access opening, at least one presence sensor, which detects the presence and/or absence of a person in the interior space, and at least one first irradiation device for irradiating the interior with UVC rays.

Furthermore, there is a kit for producing a modular shelter and a hatch for a shelter, comprising a partition wall and two opening flaps which are arranged on two different sides of the partition wall and which allow access to a sliding tray which is movable back and forth between the opening flaps.

Infrared wall panel heating with flexible heating fabric, in which a glass thread fabric is provided as the heating fabric, into which carbon threads are woven as the heating element and metallic electrical conductors, the metallic electrical conductors lying transversely to the carbon threads at both ends of the heating element and firmly looping around the carbon threads, and the heating element being electrically protected on both sides in each case by a layer of insulating foil. The wall panel heater is characterized in that at least two further layers of insulating foil and an additional layer of fleece and fabric are provided on both sides in each case for, in particular, mechanical protection of the heating element. The heater can thus be installed on a wall with direct connection to the local power supply network, in particular under plaster.