Liquid supply device, printing apparatus and liquid ejection system

A liquid supply device configured to supply a liquid to a head that is provided to eject the liquid onto an object, the liquid supply device comprising:

• a liquid containing chamber configured to contain the liquid;
• a liquid injection portion arranged to communicate with the liquid containing chamber and configured to inject the liquid into the liquid containing chamber;
• an air inlet port provided as an opening of the liquid containing chamber to introduce the air into the liquid containing chamber;
• an air flow path configured to generate air bubbles in the liquid contained in the liquid containing chamber and introduce the air into the air containing chamber and arranged to have one end that communicates with the air inlet port and the other end that is open to the atmosphere;
• and
• an air containing chamber configured to contain the air and provided in part of the air flow path, wherein
• the liquid containing chamber and the air containing chamber are provided as different bodies, and
• the air inlet port of the liquid containing chamber is provided in a lower part in a vertical direction of the liquid containing chamber, in a first attitude taken by the liquid supply device in a use state.

A liquid supply device configured to supply a liquid to a liquid ejection portion, comprising:

• a liquid tank configured to contain the liquid;
• a connection flow path member connected with the liquid tank;
• and
• a buffer tank provided as a different body from the liquid tank and connected with the liquid tank via the connection flow path member to communicate with the atmosphere, wherein
• the liquid tank comprises a liquid containing chamber provided inside of the liquid tank and a liquid injection portion configured to inject the liquid into the liquid containing chamber, and
• the buffer tank comprises a buffer chamber configured such that a bottom face of the buffer chamber is located at a position higher than a maximum liquid level in the liquid tank.

A liquid supply device configured to supply a liquid to a liquid ejection portion, comprising:

• a liquid tank configured to contain the liquid;
• a connection flow path member connected with the liquid tank;
• and
• a buffer tank provided as a different body from the liquid tank and connected with the liquid tank via the connection flow path member to communicate with the atmosphere, wherein
• the liquid tank comprises a liquid containing chamber provided inside of the liquid tank and a liquid injection portion configured to inject the liquid into the liquid containing chamber, wherein a first liquid level is set in the liquid tank at a height that is not higher than an end of the liquid injection portion that is open to the liquid containing chamber, as a guide indicating an upper limit of liquid capacity of the liquid tank,
• the buffer tank comprises a buffer chamber configured such that a bottom face of the buffer chamber is located at a position lower than the first liquid level, and
• the connection flow path member is arranged to pass through a position higher than the first liquid level and connect the liquid tank with the buffer tank.