Image recording apparatus capable of restraining entry of air to recording portion

An image recording apparatus comprising:

• a cartridge comprising:
• a first storage chamber configured to store a liquid therein;
• a first air communication portion allowing the first storage chamber to communicate with an atmosphere;
• and
• a first supply portion configured to supply the liquid stored in the first storage chamber;
• a cartridge attachment portion comprising:
• a connecting portion configured to be connected to the first supply portion;
• a second storage chamber configured to store therein the liquid supplied from the first supply portion connected to the connecting portion;
• and
• a second air communication portion allowing the second storage chamber to communicate with the atmosphere;
• a recording portion comprising a nozzle through which liquid supplied from the second storage chamber is ejected;
• a switching portion configured to change a passage resistance value of a flow of air flowing through the second air communication portion;
• a controller configured to control operation of the switching portion to set the passage resistance value at the second air communication portion to one of a first value and a second value, the first value being higher than the second value;
• and
• a detecting portion configured to detect attachment of the cartridge to the cartridge attachment portion,
• wherein the controller operates the switching portion to set the passage resistance value at the second air communication portion to the second value subject to receipt of a signal indicative of a change from non-attachment to attachment of the cartridge to the cartridge attachment portion from the detecting portion, the controller further operating the switching portion to set the passage resistance value at the second air communication portion to the first value during operation of the recording portion.

An image recording apparatus comprising:

• a cartridge comprising:
• a first storage chamber configured to store a liquid therein;
• a first air communication portion allowing the first storage chamber to communicate with an atmosphere;
• and
• a first supply portion configured to supply the liquid stored in the first storage chamber;
• a cartridge attachment portion comprising:
• a connecting portion configured to be connected to the first supply portion;
• a second storage chamber configured to store therein the liquid supplied from the first supply portion connected to the connecting portion;
• and
• a second air communication portion allowing the second storage chamber to communicate with the atmosphere;
• a recording portion comprising a nozzle through which liquid supplied from the second storage chamber is ejected;
• a switching portion configured to change a passage resistance value of a flow of air flowing through the second air communication portion;
• and
• a controller configured to control operation of the switching portion to set the passage resistance value at the second air communication portion to one of a first value and a second value, the first value being higher than the second value,
• wherein the controller operates the switching portion to set the passage resistance value at the second air communication portion to the first value during operation of the recording portion and to set the passage resistance value at the second air communication portion to the second value during non-operation of the recording portion.