Opening/closing valve

1 . An opening/closing valve comprising:

a valve body defining a passage through which a fluid can flow in a first direction;

a solenoid coil mounted on the valve body along the first direction to surround the passage on an outside of the passage; and

a valve disk including a magnetic substance, the valve disk rotatable within the passage to open and close the passage with the solenoid coil;

wherein the valve disk is rotatable about a rotary shaft extending in a second direction that is perpendicular to the first direction, the valve disk being rotatable between a closing position and an opening position;

wherein the opening/closing valve is configured so that flow of the fluid flowing through the passage is blocked when the valve disk is in the closing position and the flow of the fluid flowing through the passage is allowed when the valve disk is in the opening position;

wherein the valve disk is rotatable in a first rotational direction from the opening position to the closing position;

wherein an inner peripheral surface of the valve body defines the passage; and

wherein the valve body comprises a guide rib protruding from the inner peripheral surface of the valve body to prevent the valve disk from being rotated from the closing position in the first rotational direction.

2 . The opening/closing valve of claim 1 , wherein:

first and second parts of the valve disk are divided by the rotary shaft;

the first part is movable to an upstream side of the passage when the valve disk is rotated from the closing position to the opening position;

the second part is movable to a downstream side of the passage; and

the guide rib protrudes from the inner peripheral surface of the valve body to support a surface of the first part.

3 . The opening/closing valve of claim 1 , wherein:

first and second parts of the valve disk are divided by the rotary shaft;

the first part is movable to an upstream side of the passage when the valve disk is rotated from the closing position to the opening position;

the second part is movable to a downstream side of the passage; and

the guide rib protrudes from the inner peripheral surface of the valve body to support a surface of the second part.

4 . The opening/closing valve of claim 1 , wherein, when viewed in the first direction, the guide rib is disposed in a third direction that is perpendicular to the second direction from a rotational axis of the rotary shaft.

5 . The opening/closing valve of claim 1 , wherein, when viewed in the second direction, the valve disk defines the closing position as a state in which the valve disk is rotated by a specific angle in the first rotational direction relative to a rotation axis of the rotary shaft from the opening position to the closing position.

6 . The opening/closing valve of claim 1 , wherein the solenoid coil is configured to apply currents of opposite directions when the valve disk is moved from the closing position to the opening position and the valve disk is moved from the opening position to the closing position.

7 . The opening/closing valve of claim 1 , further comprising a torsion spring configured to provide an elastic force to cause the valve disk to be rotated from the opening position to the closing position or to cause the valve disk to be rotated from the closing position to the opening position.

8 . The opening/closing valve of claim 1 , wherein the valve disk is rotatable in a second rotational direction from the closing position to the opening position.

9 . The opening/closing valve of claim 1 , further comprising a torsion spring configured to provide an elastic force to cause the valve disk to be rotated from the opening position to the closing position.

10 . The opening/closing valve of claim 1 , further comprising a torsion spring configured to provide an elastic force to cause the valve disk to be rotated from the closing position to the opening position.

11 . The opening/closing valve of claim 1 , wherein:

the valve disk is rotatable in a second rotational direction from the closing position to the opening position; and

the valve body comprises a stopper configured to protrude from the inner peripheral surface of the valve body to prevent the valve disk from being rotated in the second rotational direction at the opening position.

12 . The opening/closing valve of claim 11 , wherein, when viewed in the first direction, the stopper is spaced apart from a rotational axis of the rotary shaft in a third direction that is perpendicular to the second direction.

13 . An opening/closing valve comprising:

a valve body defining a passage through which a fluid can flow in a first direction, wherein an inner peripheral surface of the valve body defines the passage;

a valve disk including a magnetic substance disposed at a location within the passage, the valve disk rotatable about a rotary shaft between a closing position and an opening position, wherein the rotary shaft extends in a second direction that is perpendicular to the first direction and wherein the opening/closing valve is configured so that flow of the fluid flowing through the passage is blocked when the valve disk is in the closing position and the flow of the fluid flowing through the passage is allowed when the valve disk is in the opening position;

a solenoid coil mounted outside the passage to surround the location within the passage in which the valve disk is disposed; and

a seat member configured to seat the valve disk between the inner peripheral surface of the valve body that defines the passage and the valve disk at the closing position;

wherein the valve body comprises a stopper configured to protrude from the inner peripheral surface of the valve body to prevent the valve disk from being rotated in a first rotational direction in which the valve disk is rotated from the closing position to the opening position at the opening position;

wherein the seat member comprises a seat surface configured to be inclined toward an inside of the passage with respect to the first direction, when viewed in the second direction, to prevent the valve disk at the closing position from being rotated in the first rotational direction, in which the valve disk is rotated from the opening position to the closing position; and

wherein the valve disk includes a contact surface formed to correspond to the seat surface to contact the seat surface at the closing position.

14 . The opening/closing valve of claim 13 , wherein:

a first surface of the valve disk that faces a downstream side of the passage at the closing position includes a magnetic substance of a first pole; and

a second surface of the valve disk that faces an upstream side of the passage at the closing position includes a magnetic substance of a second pole that is opposite to the first pole.

15 . The opening/closing valve of claim 14 , wherein, when viewed in the second direction, the rotary shaft is spaced apart from an imaginary reference line extending in a direction that is perpendicular to the first direction and provided at the same distance from the first surface of the valve disk and the second surface of the valve disk, in the first direction or a direction opposite to the first direction.

16 . An opening/closing valve comprising:

a valve body defining a passage through which a fluid can flow in a first direction;

a solenoid coil mounted on the valve body along the first direction to surround the passage on an outside of the passage; and

a valve disk located within the passage;

wherein the valve disk is rotatable about a rotary shaft extending in a second direction that is perpendicular to the first direction;

wherein the valve disk is rotatable between a closing position and an opening position;

wherein the opening/closing valve is configured so that flow of the fluid flowing through the passage is blocked when the valve disk is in the closing position and the flow of the fluid flowing through the passage is allowed when the valve disk is in the opening position;

wherein the valve disk comprises a first part and a second part that are divided by the rotary shaft;

wherein the first part is movable to a downstream side of the passage when the valve disk is rotated from the closing position to the opening position;

wherein the second part is movable to an upstream side of the passage; and

wherein the first part includes a magnetic substance of a first pole and the second part includes a magnetic substance of a second pole that is an opposite pole to the first pole.

17 . The opening/closing valve of claim 16 , wherein:

an inner peripheral surface of the valve body defines the passage;

a second rotational direction is defined as a direction in which the valve disk is rotated from the closing position to the opening position; and

the valve body comprises a stopper protruding from the inner peripheral surface of the valve body to prevent the valve disk from being rotated in the second rotational direction from the opening position.

18 . The opening/closing valve of claim 17 , wherein, when viewed in the first direction, the stopper is disposed on an imaginary reference line passing through the rotary shaft in the second direction.