Maintenance device and printer

1 . A maintenance device comprising:

a cap configured to detachably contact a nozzle face of a liquid discharge head;

a suction device configured to suck waste liquid from the cap;

a waste liquid storage configured to store the waste liquid sucked from the cap by the suction device;

a waste liquid channel connecting the cap and the waste liquid storage;

a cleaning liquid storage configured to store a cleaning liquid to be supplied to the cap;

a cleaning liquid channel connecting the cap and the cleaning liquid storage;

a partition between the waste liquid storage and the cleaning liquid storage, the partition separating the waste liquid in the waste liquid storage from the cleaning liquid in the cleaning liquid storage; and

a communication channel above the partition, the communication channel configured such that gases flow between the cleaning liquid storage and the waste liquid storage via the communication channel, wherein the suction device is configured to suck:

the waste liquid in the cap to discharge the waste liquid to the waste liquid storage through the waste liquid channel; and

the cleaning liquid in the cleaning liquid storage to supply the cleaning liquid to the cap through the cleaning liquid channel.

2 . The maintenance device according to claim 1 , further comprising a liquid storage including the waste liquid storage and the cleaning liquid storage,

wherein the liquid storage includes an air release portion configured to openably close the liquid storage to atmosphere.

3 . A printer comprising:

the maintenance device according to claim 1 ; and

the liquid discharge head configured to discharge a liquid to a recording medium.

4 . The printer according to claim 3 , further comprising:

a liquid storage including the waste liquid storage and the cleaning liquid storage, the liquid storage including an air release portion configured to openably close the liquid storage to atmosphere; and

circuitry configured to:

cause the cap to selectively contact with the nozzle face and separate from the nozzle face;

cause the suction device to suck the waste liquid from the cap; and

selectively open and close the air release portion.

5 . The printer according to claim 4 , wherein the circuitry is further configured to:

open the air release portion; and

cause the suction device to suck the waste liquid from the cap without supplying the cleaning liquid to the cap.

6 . The printer according to claim 4 , wherein the circuitry is further configured to:

close the air release portion;

cause the cap to separate from the nozzle face; and

cause the suction device to suck the cleaning liquid from the cap to fill the cap with the cleaning liquid.

7 . The printer according to claim 4 , wherein

the waste liquid channel includes a valve that is configured to open and close the waste liquid channel, and

the circuitry is configured to close the valve to keep the cleaning liquid in the cap.