Liquid supply device, liquid ejection device, and liquid supply method
According to one embodiment, a liquid supply device includes a tank with an lower portion and an upper portion. The lower portion is partitioned into a first chamber side and a second chamber side. The upper portion permits flow of liquid between the first and second chamber sides. The first chamber side is connected by a first flow path portion to a primary side of a filter. The second chamber side is connected by a second flow path portion to the primary side of the filter. A secondary side of the filter is connected by a third flow path portion to a liquid ejection head.
1. A liquid supply device, comprising:
a tank with an lower portion and an upper portion, the lower portion partitioned into a first chamber side and a second chamber side, the upper portion permitting flow of liquid between the first and second chamber sides;
a pump configured to supply liquid from a reservoir to the first chamber side of the tank; and
a fourth flow path portion from the pump to a position on the tank above the first chamber side, wherein
the first chamber side is connected by a first flow path portion to a primary side of a filter,
the second chamber side is connected by a second flow path portion to the primary side of the filter, and
a secondary side of the filter is connected by a third flow path portion to a liquid ejection head.
2. The liquid supply device according to claim 1 , further comprising:
a controller configured to control the pump to supply liquid to the tank at a first pressure, wherein
the first pressure is equal to or less than a flow resistance of liquid from the primary side to the secondary side of the filter.
3. The liquid supply device according to claim 2 , wherein
the controller is further configured to control the pump to supply liquid to the tank at a second pressure, and
the second pressure is greater than the flow resistance.
4. The liquid supply device according to claim 1 , wherein the first flow path portion is longer in length than the second flow path portion.
5. The liquid supply device according to claim 1 , further comprising:
the filter, wherein
the filter includes a casing and a filter member inside the casing,
the first flow path portion is connected to an upper surface of the casing at a first position,
the second flow path portion is connected to the upper surface of the casing at a second position, and
the upper surface of the casing slopes upward from the first position to the second position.
6. The liquid supply device according to claim 1 , further comprising:
the liquid ejection head.
7. The liquid supply device according to claim 6 , wherein the liquid ejection head is an inkjet head.
8. A liquid ejection device, comprising:
a reservoir;
a liquid ejection head connected to the reservoir by a flow path;
a tank on the flow path between the reservoir and the liquid ejection head; and
a filter on the flow path between the tank and the liquid ejection head;
a pump configured to supply liquid from the reservoir to the first chamber side of the tank; and
a fourth flow path portion from the pump to a position on the tank above the first chamber side, wherein
the filter has a filter member separating the filter into a primary side and a secondary side,
the tank has with an lower portion and an upper portion,
the lower portion is partitioned into a first chamber side and a second chamber side,
the upper portion of the tank permits flow of liquid between the first and second chamber sides,
the first chamber side is connected by a first flow path portion to the primary side of the filter,
the second chamber side is connected by a second flow path portion to the primary side of the filter, and
the secondary side of the filter is connected by a third flow path portion to a liquid ejection head.
9. The liquid ejection device according to claim 8 , further comprising:
a controller configured to control the pump to supply liquid to the tank at a first pressure, wherein
the first pressure is equal to or less than a flow resistance of liquid from the primary side to the secondary side of the filter.
10. The liquid ejection device according to claim 9 , wherein
the controller is further configured to control the pump to supply liquid to the tank at a second pressure, and
the second pressure is greater than the flow resistance.
11. The liquid ejection device according to claim 8 , wherein the first flow path portion is longer in length than the second flow path portion.
12. The liquid ejection device according to claim 8 , wherein
the filter includes a casing, and the filter member is inside the casing;
the first flow path portion is connected to an upper surface of the casing at a first position,
the second flow path portion is connected to the upper surface of the casing at a second position, and
the upper surface of the casing slopes upward from the first position to the second position.
13. The liquid ejection device according to claim 8 , wherein the liquid ejection head is an inkjet head.
14. A liquid supply device, comprising:
a tank with an lower portion and an upper portion, the lower portion partitioned into a first chamber side and a second chamber side, the upper portion permitting flow of liquid between the first and second chamber sides;
a pump configured to supply liquid from a reservoir to the first chamber side of the tank; and
a controller configured to control the pump to supply liquid to the tank at a first pressure, wherein
the first chamber side is connected by a first flow path portion to a primary side of a filter,
the second chamber side is connected by a second flow path portion to the primary side of the filter,
a secondary side of the filter is connected by a third flow path portion to a liquid ejection head, and
the first pressure is equal to or less than a flow resistance of liquid from the primary side to the secondary side of the filter.
15. The liquid supply device according to claim 14 , wherein
the controller is further configured to control the pump to supply liquid to the tank at a second pressure, and
the second pressure is greater than the flow resistance.
16. The liquid supply device according to claim 14 , further comprising:
the filter, wherein
the filter includes a casing and a filter member inside the casing,
the first flow path portion is connected to an upper surface of the casing at a first position,
the second flow path portion is connected to the upper surface of the casing at a second position, and
the upper surface of the casing slopes upward from the first position to the second position.
17. The liquid supply device according to claim 16 , further comprising:
the liquid ejection head.
18. The liquid supply device according to claim 14 , further comprising:
the liquid ejection head.
19. The liquid supply device according to claim 18 , wherein the liquid ejection head is an inkjet head.
20. The liquid supply device according to claim 14 , wherein the first flow path portion is longer in length than the second flow path portion.