Abstract: An electric dust collection device including a charging unit configured to charge airborne particulate matter, a dust collection unit configured to collect dust by attaching the particulate matter charged by the charging unit, a fan configured to generate airflow in a direction from the charging unit to the dust collection unit, and a power source configured to apply a first voltage to the charging unit, wherein the charging unit includes a discharge electrode installed approximately perpendicular to the process airflow in a first direction and configured to generate ions, a ground electrode installed in a second direction to cross the airflow, and a gradient potential electrode arranged in the first direction to allow the airflow to pass therethrough and to which a second voltage lower than the first voltage is applied, wherein the second voltage gradually decreases from the discharge electrode toward a central portion of the charging unit.

Abstract: A heating cooker to manage surface and inside temperatures of food. A heating portion heats inside of a heating space where the food material is placed. At least one processor controls the heating portion to perform driving for high-temperature heating after performing driving for low-temperature heating. During the driving for low-temperature heating, the heating portion may heat the inside of the heating space such that an average increase velocity of a reference temperature of the food material is lower than an average increase velocity of the reference temperature of the food material during the driving for high-temperature heating. During the driving for high-temperature heating, the heating portion may heat the inside of the heating space such that an average increase velocity of the reference temperature of the food material is higher than the average increase velocity of the reference temperature of the food material during the driving for low-temperature heating.

Abstract: A heating cooker to manage surface and inside temperatures of food. A heating portion heats inside of a heating space where the food material is placed. At least one processor controls the heating portion to perform driving for high-temperature heating after performing driving for low-temperature heating. During the driving for low-temperature heating, the heating portion may heat the inside of the heating space such that an average increase velocity of a reference temperature of the food material is lower than an average increase velocity of the reference temperature of the food material during the driving for high-temperature heating. During the driving for high-temperature heating, the heating portion may heat the inside of the heating space such that an average increase velocity of the reference temperature of the food material is higher than the average increase velocity of the reference temperature of the food material during the driving for low-temperature heating.

Abstract: A refrigerator that sprays a mist using an atomization apparatus includes an atomization state determination unit that determines an atomization state of an atomization unit. An operation of the atomization unit is controlled according to a signal determined by the atomization state determination unit. Thus, an appropriate amount of mist spray is performed according to the atomization state, so that improved spray accuracy can be attained.

Abstract: To provide a refrigerator including: a heat-insulating main body; a storage compartment defined in the heat-insulating main body; and a mist spray apparatus that sprays a fine mist into the storage compartment. The fine mist generated by the mist spray apparatus has a nano-size particle diameter and reduces microorganisms adhering to the inside of the storage compartment and to vegetable surfaces, the microorganisms including molds, bacteria, yeasts, and viruses.

Abstract: A mist atomizer is arranged in a first cooling duct including an outlet for vegetable compartment and an inlet for vegetable compartment. The mist atomizer is arranged near a gap of a lower basket and an upper basket. A refrigerator capable of efficiently collecting transpired moisture from stored food, sufficiently humidifying the interior of the basket, and having higher freshness maintaining property is provided.