Pressure control valve unit and liquid ejecting apparatus
AssigneeSeiko Epson Corporation
InventorFujio Akahane
Life of this patent
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Abstract
This invention is a pressure control valve unit including: a unit substrate; a first valve chamber provided at one side of the unit substrate, forming a part of a first liquid flow-path; a second valve chamber provided at the other side of the unit substrate, forming a part of a second liquid flow-path; a first opening-closing valve provided in the first valve chamber; and a second opening-closing valve provided in the second valve chamber. The first liquid flow-path and the second liquid flow-path are formed independently of each other. A pressure of a liquid flowing in the first liquid flow-path and a pressure of a liquid flowing in the second liquid flow-path can be controlled at respective predetermined pressures independently of each other.
Claims18
A pressure control valve unit comprising,
- a unit substrate,
- a first valve chamber provided at one side of the unit substrate, forming a part of a first liquid flow-path,
- a second valve chamber provided at the other side of the unit substrate, forming a part of a second liquid flow-path,
- a first opening-closing valve provided in the first valve chamber, and
- a second opening-closing valve provided in the second valve chamber,
- wherein
- the first liquid flow-path and the second liquid flow-path are formed independently of each other, and
- a pressure of a liquid flowing in the first liquid flow-path and a pressure of a liquid flowing in the second liquid flow-path can be controlled at respective predetermined pressures independently of each other.
A pressure control valve unit comprising,
- a unit substrate,
- a valve chamber provided at one side of the unit substrate, forming a part of a liquid flow-path,
- a opening-closing valve provided in the valve chamber, and
- a pressure chamber provided at the other side of the unit substrate, forming a part of the liquid flow-path on a downstream side with respect to the valve chamber,
- wherein
- the pressure chamber communicates with the valve chamber via the opening-closing valve, and is adapted to control a pressure of liquid introduced from the valve chamber via the opening-closing valve at a predetermined pressure,
- a central portion of the valve chamber and a central portion of the pressure chamber are arranged in a positional relationship wherein they are overlapped as seen in a thickness direction of the unit substrate,
- the central portion of the valve chamber and the central portion of the pressure chamber communicate via a communication hole,
- a valve body is inserted through the communication hole,
- the valve body is adapted to function as the opening-closing valve, and the valve body is supported by a leaf spring provided in the valve chamber.
Dependencies are inferred from the claim text.