Liquid supply device and liquid discharge device
A liquid supply device includes a first conduit, a second conduit, one or more pumps, a heater, a filter, and a bypass conduit. The first conduit is connected to an upstream side of a liquid discharge head. The second conduit is connected to a downstream side of the liquid discharge head. The liquid is supplied through the first conduit to the liquid discharge head and recovered from the liquid discharge head through the second conduit. The heater is provided along the first conduit. The filter is provided in the first conduit on a downstream side of the heater. The bypass conduit is connected between a portion of the first conduit upstream with respect to the filter and a portion of the second conduit.
1. A liquid supply device, comprising:
a first conduit connected to an upstream side of a liquid discharge head;
a second conduit connected to a downstream side of the liquid discharge head;
a pump configured to supply liquid through the first conduit to the liquid discharge head and recover the liquid from the liquid discharge head through the second conduit;
a heater provided along the first conduit;
a filter case included in the first conduit on a downstream side of the heater, the filter case including an inlet port and a bypass port on a first surface and an outlet port on a second surface opposite to the first surface, the inlet port being connected to an upstream portion of the first conduit with respect to the filter case and the outlet port being connected to a downstream portion of the first conduit with respect to the filter case;
a filter provided in the filter case between the first surface and the second surface; and
a bypass conduit connected between the bypass port of the filter case and a portion of the second conduit.
2. The liquid supply device according to claim 1 , further comprising:
a liquid tank connected to the liquid discharge head by the first conduit and the second conduit, the liquid being supplied from the liquid tank to the liquid discharge head through the first conduit and recovered to the liquid tank from the liquid discharge head through the second conduit.
3. The liquid supply device according to claim 2 , wherein the liquid tank is vented to atmosphere.
4. The liquid supply device according to claim 1 , wherein the first surface is an upper surface of the filter case, and the second surface is a bottom surface of the filter case.
5. The liquid supply device according to claim 4 , wherein the filter extends horizontally.
6. The liquid supply device according to claim 4 , wherein the filter separates a space in the filter case into an upstream space connected to the upstream portion of the first conduit and the bypass conduit and a downstream space connected to the downstream portion of the first conduit.
7. The liquid supply device according to claim 4 , wherein the bypass conduit extends upward from the bypass port of the filter case.
8. The liquid supply according to claim 4 , wherein the upstream portion of the first conduit with respect to the filter case extends downward to the filter case.
9. The liquid supply according to claim 4 , wherein the downstream portion of the first conduit with respect to the filter case extends downward from the filter case.
10. The liquid supply device according to claim 1 , wherein a flow resistance of the bypass conduit is greater than a flow resistance of a downstream portion of the first conduit with respect to the filter case.
11. A liquid discharge apparatus, comprising:
a liquid supply device according to claim 1 ; and
a liquid discharge head connected to the liquid supply device.
12. A printer, comprising:
a media conveyer configured to convey a medium;
a print head configured to discharge ink onto the medium conveyed by the media conveyer; and
a liquid supply device configured to supply ink to the print head for discharge, the liquid supply device comprising:
a first conduit connected to an upstream side of the print head;
a second conduit connected to a downstream side of the print head;
a pump configured to supply ink through the first conduit to the print head and recover the ink from the print head through the second conduit;
a heater provided along the first conduit;
a filter case included in the first conduit on a downstream side of the heater, the filter case including an inlet port and a bypass port on a first surface and an outlet port on a second surface opposite to the first surface, the inlet port being connected to an upstream portion of the first conduit with respect to the filter case and the outlet port being connected to a downstream portion of the first conduit with respect to the filter case;
a filter provided in the filter case between the first surface and the second surface; and
a bypass conduit connected between the bypass port of the filter case and a portion of the second conduit.
13. The printer according to claim 12 , further comprising:
a liquid tank connected to the print head by the first conduit and the second conduit, the ink being supplied from the liquid tank to the print head through the first conduit, and recovered to the liquid tank from the print head through the second conduit.
14. The printer according to claim 13 , wherein the liquid tank is vented to atmosphere.
15. The printer according to claim 12 , wherein the first surface is an upper surface of the filter case, and the second surface is a bottom surface of the filter case.
16. The printer according to claim 15 , wherein the filter extends along an ink discharge surface of the print head.
17. The printer according to claim 15 , wherein the filter separates a space in the filter case into an upstream space connected to the upstream portion of the first conduit and the bypass conduit and a downstream space connected to the downstream portion of the first conduit.
18. The printer according to claim 15 , wherein the bypass conduit extends upward from the bypass port of the filter case.
19. The printer according to claim 15 , wherein the upstream portion of the first conduit with respect to the filter case extends downward to the filter case.
20. The printer according to claim 15 , wherein the downstream portion of the first conduit with respect to the filter case extends downward from the filter case.