Refrigerator with automatic door and method for controlling automatic door of refrigerator

A refrigerator comprising:

• a main body including an inner case defining a storage container, an outer case surrounding the inner case, and an insulator disposed between the inner case and the outer case;
• a door rotatably coupled to the main body and configured to open and close the storage container;
• a door driver disposed at an upper portion of the main body and configured to, based on the door being pressed, open the door;
• a sensor comprising a magnetic field sensor and a magnet and configured to detect an open or closed state of the door and measure a pressed amount of the door according to a change in a distance between the magnetic field sensor and the magnet;
• and
• a controller configured to control the door driver and determine whether the door is to be opened based on the pressed amount of the door,
• wherein the controller is configured to:
• select, as a threshold value, an output voltage of the magnetic field sensor based on the door being closed,
• select an operation determination value of the door according to the threshold value,
• determine whether the door is to be opened by comparing (i) a difference between the output voltage of the magnetic field sensor when the door is pressed and the threshold value with (ii) the operation determination value,
• wherein the controller is configured to:
• based on the difference being equal to or greater than the operation determination value, control the door driver to open the door, and
• based on the difference being less than the operation determination value, determine whether the door is opened or closed.

A refrigerator comprising:

• a main body including an inner case defining a storage container, an outer case surrounding the inner case, and an insulator disposed between the inner case and the outer case;
• a door rotatably coupled to the main body and configured to open and close the storage container;
• a door driver disposed at an upper portion of the main body and configured to, based on the door being pressed, open the door;
• a sensor comprising a magnetic field sensor and a magnet and configured to detect an open or closed state of the door and measure a pressed amount of the door according to a change in a distance between the magnetic field sensor and the magnet;
• and
• a controller configured to control the door driver and determine whether the door is to be opened based on the pressed amount of the door,
• wherein the controller is configured to:
• select, as a threshold value, an output voltage of the magnetic field sensor based on the door being closed,
• select an operation determination value of the door according to the threshold value,
• determine whether the door is to be opened by comparing (i) a difference between the output voltage of the magnetic field sensor when the door is pressed and the threshold value with (ii) the operation determination value,
• wherein the controller is configured to:
• compare the output voltage of the magnetic field sensor with a preset voltage value to determine whether the door is opened or closed,
• based on the output voltage being equal to or greater than the preset voltage value, determine that the door is closed, and
• based on the output voltage being less than the preset voltage value, determine that the door is opened.