Abstract: A refrigerator according to the present invention comprises: a storage chamber for storing food; a cold air supply means for supplying cold air to the storage chamber; a first tray forming one part of an ice making cell which is a space in which water is phase-changed into ice by means of the cold air; a second tray forming the other part of the ice making cell and connected to a driving unit so as to come into contact with the first tray during an ice making process and be separated from the first tray in an ice separating process; a heater positioned adjacent to the first tray and/or the second tray; an operation unit for inputting a start command of a test mode; and a control unit for controlling the heater and/or the driving unit in the test mode, wherein, if the start command of the test mode is input during the operation of the heater, the control unit turns the heater off and operates the driving unit such that the second tray moves.

Abstract: A refrigerator includes a storage space, a cooler, a first tray constituting a part of a cell which is the space in which water is phase-changed to ice by the cold, a second tray, which constitutes another part of the cell, a water supply valve to adjust the flow of water to be supplied to the icing cell, a water supply amount detection unit or sensor, and a controller configured to control the supply valve.

Abstract: The present invention relates to a refrigerator. The refrigerator of the present invention may include a first tray assembly configured to define one portion of an ice making cell, a second tray assembly configured to define the other portion of the ice making cell, a heater disposed adjacent to at least one of the first and second tray assemblies, and a controller configured to control the heater. The refrigerator further include a pusher including a first edge having a surface pressing the ice or at least one of the first and second tray assemblies to easily separate the ice from the tray assemblies, a bar extending from the first edge, and a second edge disposed at the end of the bar. The second tray assembly includes a first coupling part connected to the pusher and a second coupling part connected to the driver. The controller control to move at least one of the pusher and the second tray assembly to change a relative position between the pusher and the second tray assembly.

Abstract: A refrigerator according to the present disclosure includes a first tray configured to form a portion of each of a plurality of ice making cells, and a second tray configured to be rotatable with respect to the first tray and to form the other portion of each of the plurality of ice making cells, in which water supply is performed at the water supply position of the second tray, when water supply is completed, the second tray is moved to the ice making position, and one or more of the first tray and the second tray is provided with a communication hole for communicating the plurality of ice making cells at the ice making position of the second tray.

Abstract: The present invention comprises: a first tray for forming a portion of an ice-making cell; a second tray forming the other portion of the ice-making cell, and capable of moving relative to the first tray; an ice bin for storing ice separated from the first and second trays; and a full-ice sensing lever for moving together with the second tray in a predetermined range.

Abstract: The present invention provides a 3-dimensional nanoparticle structure, wherein a plurality of structures formed by assembling nanoparticles is connected to form a bridge, and a gas sensor using the same.

Abstract: The present invention provides a 3-dimensional nanoparticle structure, wherein a plurality of structures formed by assembling nanoparticles is connected to form a bridge, and a gas sensor using the same.