An electric heater includes a substrate (an insulating material capable of forming a conductor pattern on a surface of an insulating substrate), a first plane heating element formed on one surface of the substrate, and a second plane heating element formed on one surface of the substrate to be located outside the first plane heating element. The first plane heating element includes a first pattern portion connecting a start point with an end point located in a first zone, a pair of first electrodes located outside the first zone, and a pair of first connectors connecting the first pattern portion with the first electrodes. The second plane heating element includes a second pattern portion located in a second zone surrounding the first zone and connecting a start point with an end point, and at least some of the first connectors are located in the second zone.

A secure delivery container can have a body with a chamber that can receive one or more items for delivery to an end recipient and a door actuatable to close the chamber in a locked position and open to allow access to the items. The container can have a heat transfer system with one or more heat transfer elements in thermal communication with one or more surfaces of the body that define the chamber and configured to heat or cool the one or more surfaces to heat or cool the delivery items in the chamber. The container can wirelessly communicate with a remote electronic device to receive information from the remote electronic device and to communicate operational information from the one or more heat transfer elements to the remote electronic device.

The present invention relates to a multipurpose heating plate and a system designed to maintain food items at an optimal or elevated temperature for consumption. More specifically, the plate includes a heating element embedded within the plate, and disposed between a top surface and a bottom surface. The heating element radiates heat to maintain the warmth of the food placed on the top surface for a prolonged period of time to avoid deterioration of the food. The plate can include an insulating cover comprising silicone or rubber. A storage and charging rack includes a plurality of slots for storing the warmer plates. Each slot includes a charging slot for charging the heating element. The warmer plate also includes a charging port for engaging with the charging slot, thereby enabling the heating element to charge.

A cooking system includes a placement unit which has a food-holding element and a heating unit for heating the food-holding element. An induction unit provides in at least one operating state an amount of heating energy for inductively heating the food-holding element. The heating unit includes a heating element which is different from an induction heating element and is provided for heating the food-holding element.

An electric heater includes a substrate (an insulating material capable of forming a conductor pattern on a surface of an insulating substrate), a first plane heating element formed on one surface of the substrate, and a second plane heating element formed on one surface of the substrate to be located outside the first plane heating element. The first plane heating element includes a first pattern portion connecting a start point with an end point located in a first zone, a pair of first electrodes located outside the first zone, and a pair of first connectors connecting the first pattern portion with the first electrodes. The second plane heating element includes a second pattern portion located in a second zone surrounding the first zone and connecting a start point with an end point, and at least some of the first connectors are located in the second zone.

An actively heated or cooled mug has a body with a chamber that can receive and hold a beverage and a heating or cooling system disposed at least partially in a cavity below the chamber. The heating or cooling system has a heating or cooling element to actively heat or cool the chamber, power storage devices, and circuitry that controls the operation of the heating or cooling elements. A user interface is electrically connected to the circuitry and has one or more selection members actuatable a) to turn off the one or more heating or cooling element or b) to adjust a temperature setting to one of multiple temperature settings configured to control the one or more heating or cooling elements to heat or maintain the liquid at a user selected temperature.

An apparatus is disclosed. The apparatus has an outer housing, an inner housing disposed in the outer housing and forming a gap between an exterior surface of the inner housing and an interior surface of the outer housing, one or more thermal devices disposed in the gap, and an electrical port disposed in or on the outer housing and electrically connected to the one or more thermal devices.

A baby food warming system for warming baby food, including milk and other liquid or semi-liquid beverages, without using an AC power source is disclosed. The present invention provides a system including a charging case and a baby food warmer. The charging case includes an upper cover having a magnet, and a charging base having a magnetic switch, a charging connector, and an UV-C light emitting diode. The baby food warmer includes a main body having a temperature regulator, an external sensor, and an internal sensor, all at a lower tip of the main body, and a top cap attachable to the main body for closing the main body. The top cap further includes a micro-controller configured to generate control signals for controlling the temperature regulator, and to receive sensing signals from the external sensor and the internal sensor.

Radiant furniture made of a concrete mix includes one or more heating elements or hot water supplied hydronic tubing that provide comfortable radiant heat. Tabletops can be heated to a temperature that is comfortable for people seated at the table. Benches and seats can be heated to provide comfortable heated seating. Combinations can also be used together, such as a heated tabletop with heated seats. A controller senses the temperature of the furniture and the ambient temperature, then applies power to one or more heating elements in the furniture according to programmed temperature thresholds to provide comfortable radiant heat from the furniture. The controller includes a calibration mode that allows calibrating the controller to a particular heated surface. The controller further comprises a knob that determines an operating mode for the controller and allows adjusting a temperature threshold for the heated surface up or down.

Devices, systems, and methods are provided for heating and cooling substances, such as food and beverages. A portable device may have an exterior surface and an interior surface, with one or more heating elements positioned at least partially between the exterior surface and the interior surface, and with one or more cooling elements positioned at least partially between the exterior surface and the interior surface. The portable device may include one or more power sources operatively connected to the one or more heating elements and the one or more cooling element, and may include at least one processor that controls, based on the one or more power sources, activation of one of the one or more heating elements or the one or more cooling elements at a time.