Dielectric heating apparatus and printing system
A dielectric heating apparatus includes: a conveyance unit configured to convey an object to be heated; an electrode unit including a first electrode and a second electrode which face the object to be heated, that is conveyed in a first direction, in a second direction intersecting the first direction and which are applied with an alternating current voltage; and a metal first cover unit configured to surround the electrode unit. The first cover unit includes a first insertion port through which the object to be heated is inserted into the first cover unit, a first feed-out port through which the object to be heated is fed out of the first cover unit, and a plurality of first opening portions that are different from the first insertion port and the first feed-out port.
1 . A dielectric heating apparatus, comprising:
a conveyance unit configured to convey an object to be heated;
an electrode unit including a first electrode and a second electrode which face the object to be heated, that is conveyed in a first direction, in a second direction intersecting the first direction and which are applied with an alternating current voltage; and
a metal first cover unit surrounding the electrode unit, wherein
the metal first cover unit includes
a first insertion port for inserting the object to be heated into the metal first cover unit,
a first feed-out port for feeding the object to be heated out of the metal first cover unit, and
a plurality of first opening portions that are different from the first insertion port and the first feed-out port, and
the dielectric heating apparatus further includes an edge portion made of an electrically insulating magnetic material and continuously surrounding at least one of the first insertion port and the first feed-out port.
2 . The dielectric heating apparatus according to claim 1 , further comprising:
a metal second cover unit surrounding the metal first cover unit, wherein
the metal second cover unit includes
a second insertion port for inserting the object to be heated into the metal second cover unit,
a second feed-out port for feeding the object to be heated out of the metal second cover unit, and
a plurality of second opening portions that are different from the second insertion port and the second feed-out port.
3 . The dielectric heating apparatus according to claim 2 , wherein
a sum of opening areas of the second opening portions is larger than a sum of opening areas of the first opening portions.
4 . The dielectric heating apparatus according to claim 1 , further comprising:
a plurality of the electrode units are provided, wherein
the plurality of electrode units are arranged side by side in a third direction which intersects the first direction and which is orthogonal to the second direction.
5 . The dielectric heating apparatus according to claim 1 , further comprising:
a movement unit configured to reciprocate the electrode unit in a fourth direction which intersects the first direction and which is orthogonal to the second direction.
6 . The dielectric heating apparatus according to claim 5 , further comprising:
a metal third cover unit disposed in the metal first cover unit, covering the electrode unit, and facing, in the second direction, the object to be heated that is conveyed in the first direction, wherein
the meal third cover unit is configured to reciprocate in the fourth direction together with the electrode unit, and includes
a third opening portion opened toward the object to be heated in the second direction and surrounding the first electrode and the second electrode when viewed along the second direction, and
a plurality of fourth opening portions that are different from the third opening portion.
7 . The dielectric heating apparatus according to claim 1 , wherein
the metal first cover unit is made of zinc.
8 . The dielectric heating apparatus according to claim 1 , further comprising:
an airflow generation unit configured to generate an airflow in the metal first cover unit.
9 . A printing system, comprising:
the dielectric heating apparatus according to claim 1 ; and
a liquid discharge unit configured to discharge a liquid onto a printing medium, wherein
the conveyance unit conveys, as the object to be heated, the printing medium on which the liquid is adhered.
10 . A dielectric heating apparatus, comprising:
a conveyance unit configured to convey an object to be heated;
an electrode unit including a first electrode and a second electrode which face the object to be heated, that is conveyed in a first direction, in a second direction intersecting the first direction and which are applied with an alternating current voltage; and
a metal first cover unit surrounding the electrode unit, the metal first cover unit being in a rectangular parallelepiped having a top surface, a bottom surface, and first, second, third, and fourth sidewalls, wherein
the metal first cover unit includes:
a first insertion port for inserting the object to be heated into the metal first cover unit, and the first insertion port is formed in the first sidewall;
a first feed-out port for feeding the object to be heated out of the metal first cover unit, and the first feed-out port is formed in the second sidewall facing the first sidewall; and
a plurality of first opening portions that are different from the first insertion port and the first feed-out port, and the plurality of first opening portions are formed in only the third sidewall.
11 . The dielectric heating apparatus according to claim 10 , further comprising:
an edge portion made of an electrically insulating magnetic material and continuously surrounding at least one of the first insertion port and the first feed-out port.
12 . The dielectric heating apparatus according to claim 10 , further comprising:
a metal second cover unit surrounding the metal first cover unit, wherein
the metal second cover unit includes
a second insertion port for inserting the object to be heated into the metal second cover unit,
a second feed-out port for feeding the object to be heated out of the metal second cover unit, and
a plurality of second opening portions that are different from the second insertion port and the second feed-out port.
13 . The dielectric heating apparatus according to claim 12 , wherein
a sum of opening areas of the second opening portions is larger than a sum of opening areas of the first opening portions.
14 . The dielectric heating apparatus according to claim 10 , further comprising:
a plurality of the electrode units are provided, wherein
the plurality of electrode units are arranged side by side in a third direction which intersects the first direction and which is orthogonal to the second direction.
15 . The dielectric heating apparatus according to claim 10 , further comprising:
a movement unit configured to reciprocate the electrode unit in a fourth direction which intersects the first direction and which is orthogonal to the second direction.
16 . The dielectric heating apparatus according to claim 15 , further comprising:
a metal third cover unit disposed in the metal first cover unit, covering the electrode unit, and facing, in the second direction, the object to be heated that is conveyed in the first direction, wherein
the metal third cover unit is configured to reciprocate in the fourth direction together with the electrode unit, and includes
a third opening portion opened toward the object to be heated in the second direction and surrounding the first electrode and the second electrode when viewed along the second direction, and
a plurality of fourth opening portions that are different from the third opening portion.
17 . The dielectric heating apparatus according to claim 10 , wherein
the metal first cover unit is made of zinc.
18 . The dielectric heating apparatus according to claim 10 , further comprising:
an airflow generation unit configured to generate an airflow in the metal first cover unit.
19 . A printing system, comprising:
the dielectric heating apparatus according to claim 10 ; and
a liquid discharge unit configured to discharge a liquid onto a printing medium, wherein
the conveyance unit conveys, as the object to be heated, the printing medium on which the liquid is adhered.