Glass panel unit and glass window
A glass panel unit includes: a first panel including a glass pane; a second panel including another glass pane; a sealing portion; an exhaust port; and a printed portion. The second panel is arranged to face the first panel. The sealing portion is formed in a frame shape and hermetically bonds respective peripheral edge portions of the first and second panels to create an evacuated, hermetically sealed space between the first panel and the second panel. The exhaust port is provided for one panel selected from the first and second panels. A port sealing member hermetically seals the exhaust port. The printed portion is provided for the other panel selected from the first and second panels. The printed portion is located in an area, facing the exhaust port, of one surface of the other panel. The one surface either faces toward, or faces away from, the hermetically sealed space.
1. A glass panel unit comprising:
a first panel including a first glass pane;
a second panel including a second glass pane and arranged to face the first panel;
a sealing portion formed in a frame shape and hermetically bonding respective peripheral edge portions of the first and second panels to create an evacuated, hermetically sealed space between the first panel and the second panel;
an exhaust port provided for one panel selected from the group consisting of the first and second panels; and
a printed portion provided for an other panel selected from the group consisting of the first and second panels, the other panel not having the exhaust port, the printed portion being located in an area, facing the exhaust port, of one surface of the other panel, the one surface either facing toward, or facing away from, the hermetically sealed space,
the printed portion being formed in a shape of a frame having a predetermined width as measured inward from edges in a front view of the other panel and extending along the edges in their entirety,
wherein, the printed portion has opacity and when the glass panel unit is viewed through the other panel, the exhaust port and the sealing portion are hidden behind the printed portion and are invisible.
2. The glass panel unit of claim 1 , wherein
the sealing portion and the printed portion are made of two different materials, each of the two different materials having a predetermined melting point, and
the printed portion has a higher melting point than the sealing portion.
3. The glass panel unit of claim 1 , wherein
the printed portion is made of a material including a ceramic.
4. The glass panel unit of claim 1 , further comprising a gas adsorbent provided on a counter surface, facing toward the hermetically sealed space, of the one panel, wherein the printed portion has a predetermined length, the predetermined length being measured along the edge of the other panel, and
the exhaust port and the gas adsorbent are located in an area of the counter surface of the one panel, the area of the counter surface of the one panel facing the printed portion.
5. The glass panel unit of claim 1 , further comprising a low emissivity film formed on a counter surface of the one panel.
6. The glass panel unit of claim 1 , further comprising:
a third panel including a third glass pane and arranged to face an arbitrary panel selected from the group consisting of the first and second panels; and
a second sealing portion formed in a frame shape and hermetically bonded to the arbitrary panel and the third panel to create another hermetically sealed space between the arbitrary panel and the third panel.
7. A glass window comprising:
the glass panel unit of claim 1 ; and
a window frame into which peripheral edge portions of the glass panel unit are fitted.