| CPC B05B 9/0403 (2013.01) [B65D 1/323 (2013.01); H01L 21/67017 (2013.01); H01L 21/67051 (2013.01); B05C 11/1013 (2013.01); B05C 11/1042 (2013.01); B08B 3/02 (2013.01)] | 20 Claims |

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1. A liquid storage unit comprising:
a tank housing defining a storing space therein;
a liquid outlet pipe penetrating into the tank housing and having an outlet formed thereon; and
a liquid inlet pipe penetrating into the tank housing and having an inlet formed thereon, and
wherein a first guide surface is provided between the outlet and the inlet,
wherein a part or all of the inlet at least partially overlaps the first guide surface when seen from above.
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