Refrigerator and control method therefor

Abstract

A refrigerator of the present invention comprises: a storage chamber which stores food; a cold air supply means which supplies cold air to the storage chamber; a first tray which forms a part of an ice making cell that is a space where water is phase-changed into ice by the cold air; a second tray which forms another part of the ice making cell may come into contact with the first tray during an ice making process, and may be separated from the first tray during an ice transfer process; a heater which is positioned adjacent to at least one of the first tray and the second tray; a sensor which determines the position of the second tray in a movement process of the second tray; and a control unit which controls the heater. Once a second signal is output from the sensor at the point of time when an initialization operation of the second tray starts, the control unit controls the second tray so that the second tray moves in the reverse direction for A seconds and then moves in the forward direction for B seconds. Once a first signal is output from the sensor after the second tray moves in the forward direction for B seconds, the control unit controls the second tray so that the second tray moves in the forward direction until an output changes to the second signal in the sensor. At the point of time when the output of the sensor changes to the second signal, the control unit recognizes, as a water supply position, a place where the second tray is positioned.

Description

technical field [0001] This instruction relates to a refrigerator and a control method thereof. Background technique [0002] In general, a refrigerator is a home appliance capable of storing food at a low temperature in an internal storage space shielded by a door. The refrigerator cools the inside of the storage space by using cold air, and can preserve the stored food in a refrigerated or frozen state. Generally, an ice maker for making ice is provided in the refrigerator. The ice maker accommodates water supplied from a water supply source or a water tank behind a tray, and generates ice by cooling the water. The ice maker can remove the ice that has been made from the ice tray by heating or twisting. [0003] An example of an ice maker that automatically supplies water and removes ice as described above is formed so as to open upward to hold molded ice. [0004] The ice made in the ice maker with the above-mentioned structure has a flat surface at least on one side,...

AI Technical Summary

Problems solved by technology

[0014] However, according to the existing literature 2, it simply increases the heating amount of the heater when the volume of the water decreases, so it is difficult to produce ice with uniform transparency according to the shape of the ice.

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