Glass panel unit assembly, and method for manufacturing glass panel unit
A glass panel unit assembly includes: glass substrates; a peripheral wall having a frame shape and disposed between the glass substrates; a partition; an evacuation port; and a plurality of air passages. The partition partitions an internal space into an evacuation space, a ventilation space, and a coupling space. The evacuation port connects the ventilation space to an external environment. The plurality of air passages includes: a first air passage connecting the evacuation space to the coupling space; and a second air passage connecting the coupling space to the ventilation space. The second air passage includes a particular air passage having a larger dimension than any of the first air passage.
1. A glass panel unit assembly comprising:
a pair of glass substrates arranged to face each other;
a peripheral wall having a frame shape and disposed between the pair of glass substrates;
a partition provided to partition an internal space, surrounded with the pair of glass substrates and the peripheral wall, into an evacuation space, a ventilation space, and a coupling space;
an evacuation port connecting the ventilation space to an external environment; and
a plurality of air passages provided to evacuate the evacuation space through the evacuation port,
the plurality of air passages including:
one or more first air passages connecting the evacuation space to the coupling space; and
one or more second air passages connecting the coupling space to the ventilation space,
the one or more second air passages including a particular air passage having a larger dimension than any of the one or more first air passages.
2. The glass panel unit assembly of claim 1 , wherein
the particular air passage has its dimension determined to avoid, when the plurality of air passages are closed by deforming the partition, being closed before the one or more first air passages are all closed.
3. The glass panel unit assembly of claim 1 , wherein
the particular air passage is an air passage between the partition and the peripheral wall.
4. A method for manufacturing a glass panel unit, the method comprising an assembling step, an evacuation step, and a sealing step,
the assembling step including providing the glass panel unit assembly according to claim 1 ,
the evacuation step including evacuating the evacuation space through the plurality of air passages, the coupling space, the ventilation space, and the evacuation port,
the sealing step including deforming the partition to close all of the plurality of air passages but at least the particular air passage.
5. The method of claim 4 , wherein
the sealing step includes deforming the partition while evacuating the evacuation space through the plurality of air passages, the coupling space, the ventilation space, and the evacuation port.
6. The method of claim 4 , wherein
the sealing step includes closing the particular air passage as well.
7. The method of claim 4 , further comprising a removing step, wherein
the removing step includes removing a part including the ventilation space and a part including the coupling space to obtain a glass panel unit as a part including the evacuation space.