Door opening and closing device for refrigerator and method of controlling the same
First Claim
1. A door opening and closing device for a refrigerator, comprising:
- a door coupled by means of a hinge unit to a main body including a storage compartment defined therein;
an opening and closing unit including a drive unit for generating rotational force by means of a motor and a door rotating mechanism for rotating the door using the rotational force of the drive unit so as to open or close the door;
a back electromotive force measuring device for measuring a back electromotive force value generated in the motor;
a power circuit connected to a power supply to supply power to the motor;
a back electromotive force circuit for transmitting back electromotive force of the motor to the back electromotive force measuring device;
a control switch for selectively connecting the motor to one of the back electromotive force circuit and the power circuit; and
a control unit for controlling the control switch to be connected to the power circuit when the motor is activated, and controlling the control switch to be connected to the back electromotive force circuit and controlling the motor to open or close the door when the motor is deactivated,wherein the control unit controls the door to be rotated in a closing direction when a predetermined back electromotive force is input to the back electromotive force measuring device in a state in which the motor is deactivated.
1 Assignment
0 Petitions
Accused Products
Abstract
A door opening and closing device for a refrigerator includes a door coupled to a main body, an opening and closing unit including a drive unit for generating rotational force by means of a motor and a door rotating mechanism for opening or closing the door, a device for measuring a back electromotive force generated from the motor, a power circuit connected for supplying power to the motor, a circuit for transmitting back electromotive force of the motor to the device, a control switch for selectively connecting the motor to the circuit or the power circuit, and a control unit for connecting the control switch to the power circuit when the motor is activated, and connecting the control switch to the circuit and opening or closing the door when the motor is deactivated, wherein the control unit closes the door when a predetermined back electromotive force is input to the device.
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Citations
20 Claims
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1. A door opening and closing device for a refrigerator, comprising:
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a door coupled by means of a hinge unit to a main body including a storage compartment defined therein; an opening and closing unit including a drive unit for generating rotational force by means of a motor and a door rotating mechanism for rotating the door using the rotational force of the drive unit so as to open or close the door; a back electromotive force measuring device for measuring a back electromotive force value generated in the motor; a power circuit connected to a power supply to supply power to the motor; a back electromotive force circuit for transmitting back electromotive force of the motor to the back electromotive force measuring device; a control switch for selectively connecting the motor to one of the back electromotive force circuit and the power circuit; and a control unit for controlling the control switch to be connected to the power circuit when the motor is activated, and controlling the control switch to be connected to the back electromotive force circuit and controlling the motor to open or close the door when the motor is deactivated, wherein the control unit controls the door to be rotated in a closing direction when a predetermined back electromotive force is input to the back electromotive force measuring device in a state in which the motor is deactivated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A door opening and closing device for a refrigerator, comprising:
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a door coupled by means of a hinge unit to a main body including a storage compartment defined therein; an opening and closing unit for opening or closing the door with respect to a main body using rotational force of a motor; a back electromotive force measuring device for measuring a back electromotive force value generated in the motor; a door switch for detecting that the door is opened to a predetermined angle with respect to the main body; and a control unit for controlling the motor to open or close the door, wherein the control unit controls the door to be opened when it is detected by the door switch that the door is opened, and controls the door to be closed when a back electromotive force is detected by the back electromotive force measuring device. - View Dependent Claims (16, 17)
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18. A method of controlling an opening and closing device for a refrigerator, comprising:
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detecting that operation of a motor is halted; disconnecting the motor from a power circuit and connecting the motor to a back electromotive force circuit when operation of the motor is halted; disconnecting the motor from the back electromotive force circuit and connecting the motor to the power circuit when a predetermined back electromotive force value is detected; and activating the motor to rotate the door in a closing direction. - View Dependent Claims (19, 20)
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Specification