An electrical heater includes two thermally conductive insulating plates, a PTC heating module, a housing, and two waterproof end caps. The PTC heating module is interposed between the two thermally conductive insulating plates. The housing receives the heating module and the two thermally conductive insulating plates, and includes two open ends. The two waterproof end caps include a first waterproof end cap and a second waterproof end cap disposed corresponding to the two open ends respectively. A waterproof effect is ensured by avoiding the use of waterproof adhesives which have poor adhesion when contacted by water.

A heater assembly is for a hair styling device. The heater assembly includes a substrate, and at least one conductor layer, the at least one conductor layer having at least one heater track through which current can flow to heat the substrate. At least one electrically insulating layer is between the at least one conductor layer and the substrate. The at least one heater track is formed of a silver-based material. The at least one electrically insulating layer is configured to prevent electrical breakdown between the at least one conductor layer and the substrate.

An apparatus for wax welding is provided that includes a removable cartridge adapted for operative engagement with a power supply. The removable cartridge includes a tube defining a proximal end portion, a distal end portion, a longitudinal axis, and a hollow bore, and a self-regulating heater is disposed within the tube. The apparatus further includes a tip secured to the distal end portion of the tube within the hollow bore, the tip defining a proximal end portion having an internal cavity. The tip defines an upper surface, a lower surface, and the tip is oriented relative to a longitudinal axis of the cartridge.

A device can include a body including a sensor and an accelerometer. The sensor can detect contact with the body. The accelerometer can detect a movement of the body. The device can also include at least one processor. The at least one processor can determine an action corresponding to the movement of the body. The action can include at least one of a thermal effect, a production of light, or a transmission of power. The at least one processor can also cause the device to perform the action.

An electric heater includes a substrate and an inner plane heating element formed on one surface of the substrate. The inner plane heating element includes an inner pattern portion connecting a start point with an end point. The inner pattern portion includes a first track, a second track located outside the first track and spaced part from the first track, a first bridge connecting the first track with one end of the second track, a third track located outside the second track and spaced apart from the second track, and a second bridge connecting the other end of the second track with the third track. A first gap G1 between the first and second tracks is shorter than a second gap G2 between the second and third tracks along a virtual line crossing the first, second and third tracks and closer to the first bridge than the second bridge.

In one embodiment, a hair lightening wand is provided, which includes an upper arm and lower arms having upper and lower heating plates, respectively. The arms are pivotally connected by a hinge. The upper and lower heating plates are separated by a gap of a fixed distance along an entire length of the upper and lower heating plates when the upper and lower arms are in a fully closed position. The gap between the upper and lower heating plates is unobstructed in a direction transverse to the upper and lower arms along a length of the upper and lower heating plates.

In a hair styling apparatus and method, a first arm has a heating element and a contact plate heatable by the heating element and having a hair-contact surface. At least one temperature sensor is configured to sense a temperature of the heating element. A controller is operable to determine whether the hair styling apparatus is in an opened position or a closed position and is communicatively coupled to the at least one temperature sensor. The controller is operable to control the temperature of the heating element by: when the hair styling apparatus is in its closed position, energizing the heating element when the sensed temperature falls below a first threshold temperature, and when the hair styling apparatus is in its opened position, energizing the heating element when the sensed temperature falls below a second threshold temperature. The second threshold temperature is higher than the first threshold temperature.

A utility bag having a plurality of panels defining an interior and an exterior, the interior including a cavity configured to receive an item. The utility bag includes a heater element disposed in the cavity, a battery pack configured for electrical communication with the heater element for powering the heater element, and a controller removably coupled in selective electrical communication to the battery pack. The controller is shaped and sized to mechanically mate with the battery pack for electrical communication therewith.

A heating device for heating water has a carrier to which at least one heating element is applied, the heating element having one or more heating conductors which are connected one behind the other. The heating device has a flat dielectric layer which substantially covers the heating conductors or the heating element. An electrically conductive connection area is in each case provided on both sides of the dielectric layer with the same coverage. At least one of the connection areas is connected to a controller for evaluating a leakage current as current flows through the dielectric layer, and the heating element is connected to measuring means for monitoring a heating conductor current through the heating element. Both the leakage current and the heating conductor current are monitored over time and faults can be identified if there are conspicuous changes.

A heating system of the present disclosure includes: a heating element configured to generate heat; a thermoelectric device disposed adjacent to the heating element; and a switching device electrically connected to the thermoelectric device and configured to maintain a temperature of the heating element within a set temperature range by switching current that is supplied to the thermoelectric device based on the temperature of the heating element.