A dielectric heating device includes: a transport unit configured to transport a medium in a transport direction; an electrode unit configured to dry the medium transported by the transport unit by dielectric heating, the electrode unit including a first electrode and a second electrode that face the medium; a voltage application unit configured to apply an AC voltage to the first electrode and the second electrode; and a control unit configured to control the transport unit. The second electrode includes a first portion and a second portion that sandwich the first electrode in the transport direction. The first portion is disposed upstream of the second portion in the transport direction. The first electrode and the second electrode are formed such that a heating amount of the medium by an electric field formed between the first electrode and the first portion is larger than a heating amount of the medium by an electric field formed between the first electrode and the second portion.

A dielectric heating device includes: a transport unit configured to transport a medium in a transport direction; an electrode unit configured to dry the medium transported by the transport unit by dielectric heating, the electrode unit including a first electrode and a second electrode that face the medium; a voltage application unit configured to apply an AC voltage to the first electrode and the second electrode; and a control unit configured to control the transport unit. The second electrode includes a first portion and a second portion that sandwich the first electrode in the transport direction. The first portion is disposed upstream of the second portion in the transport direction. The first electrode and the second electrode are formed such that a heating amount of the medium by an electric field formed between the first electrode and the first portion is larger than a heating amount of the medium by an electric field formed between the first electrode and the second portion.

A wood heating system comprises an electric power source, a first electrode assembly, a second electrode assembly, and a control system. The first electrode assembly is connected to the electric power source and is adapted to make electrical contact with a first end of a wood length to apply electric power to the wood length. The first electrode assembly comprises at least two electrode segments. The second electrode assembly is adapted to make electrical contact with a second end of the wood length. The control system is adapted to selectively connect/disconnect electric power flow between the electric power source and at least one electrode segment of the first electrode assembly.

A wood heating system comprises an electric power source, a first electrode assembly, a second electrode assembly, and a control system. The first electrode assembly is connected to the electric power source and is adapted to make electrical contact with a first end of a wood length to apply electric power to the wood length. The first electrode assembly comprises at least two electrode segments. The second electrode assembly is adapted to make electrical contact with a second end of the wood length. The control system is adapted to selectively connect/disconnect electric power flow between the electric power source and at least one electrode segment of the first electrode assembly.

A battery powered blow dryer having a novel battery cooling feature to simultaneously cool the batteries and improve hair dryer performance.

A drying device is configured with a sensor corresponding to an air knife-nozzle, and a control switch which suspends an operation of the device when the air knife-nozzle is detected as working abnormally, thereby preventing abnormal products from being produced due to the failure of finding an abnormal condition of the air knife-nozzle in time, ensuring the normal process of the product, and avoiding the nonessential economic loss.

A drying device is configured with a sensor corresponding to an air knife-nozzle, and a control switch which suspends an operation of the device when the air knife-nozzle is detected as working abnormally, thereby preventing abnormal products from being produced due to the failure of finding an abnormal condition of the air knife-nozzle in time, ensuring the normal process of the product, and avoiding the nonessential economic loss.

A device for the heat treatment of a product includes an enclosure, a conveyor for transporting the product between an inlet of the enclosure and an outlet of the enclosure, which comprise a screw mounted in such a way as to rotate in the enclosure according to a geometric rotational axis, and a heater for heating the screw by Joule effect. The screw has an electrical resistance that varies along the geometric rotational axis.

A device for the heat treatment of a product includes an enclosure, a conveyor for transporting the product between an inlet of the enclosure and an outlet of the enclosure, which comprise a screw mounted in such a way as to rotate in the enclosure according to a geometric rotational axis, and a heater for heating the screw by Joule effect. The screw has an electrical resistance that varies along the geometric rotational axis.

An improved hair dryer includes a fan unit and a heating unit to generate a linear heated air current which can mix with outside cold air to obtain a rotational air current of moderate temperature and to increase the capability of penetrating a user's hair. Therefore, the air provided by the hair dryer would not become both hot and dry, but maintain an ideal, moderate temperature suitable for users, so that users may feel more comfortable while dressing their hairs. Furthermore, the increased capability of penetrating a user's hair allows the hair to be dried more quickly.