Recording head and recording apparatus

A recording head comprising:

• ejection ports that eject ink;
• a first liquid chamber for supplying ink to the ejection ports;
• a second liquid chamber for supplying ink to the first liquid chamber;
• a gas reservoir disposed in the upper part of the first liquid chamber and collecting gas;
• a first outlet through which fluid is discharged out of the gas reservoir;
• a pump chamber into which fluid is moved through the first outlet out of the first liquid chamber by producing a pressure difference from the first liquid chamber;
• a pump for sending fluid from the pump chamber to the second liquid chamber;
• a second outlet for discharging fluid out of the second liquid chamber;
• a discharge flow passage that is connected with the pump and through which fluid is discharged from the second outlet;
• and
• a first discharge control valve capable of opening and closing the second outlet according to the level of liquid in the second liquid chamber.

A recording apparatus comprising:

• a recording head that ejects ink;
• an ink tank that supplies ink to the recording head;
• and
• a tube for supplying ink from the ink tank to the recording head,
• wherein the recording head includes ejection ports that eject ink, a first liquid chamber for supplying ink to the ejection ports, a second liquid chamber for supplying ink to the first liquid chamber, a gas reservoir disposed in the upper part of the first liquid chamber and collecting gas, a first outlet through which fluid is discharged out of the gas reservoir, and a pump chamber into which fluid is moved through the first outlet out of the first liquid chamber by producing a pressure difference from the first liquid chamber, a first one-way valve that permits movement of fluid from the gas reservoir to the pump chamber and blocks movement of fluid from the pump chamber to the gas reservoir, and a second one-way that valve permits movement of fluid from the pump chamber to the second liquid chamber and blocks movement of fluid from the second liquid chamber to the pump chamber.