Pilot solenoid valve
AssigneeLIXIL Corporation
InventorsNaoki Domoto, Shinya Sakata
Life of this patent
Estimating the term…
Abstract
Provided is a pilot solenoid valve capable of bringing the strokes of a plunger to a necessary minimum and capable of achieving solenoid valve miniaturization and power saving. A pilot solenoid valve is provided with a diaphragm section, a primary side section, a secondary side section, a main valve, a back pressure chamber, a primary side auxiliary flow path, a secondary side auxiliary flow path, an auxiliary valve, and an auxiliary valve drive unit, wherein the secondary side auxiliary flow path is not formed in the main valve but rather is formed in the area around the main valve so as to bypass the main valve.
Claims7
A pilot solenoid valve assembly comprising:
- a diaphragm portion;
- a primary portion into which a liquid flows toward the diaphragm portion;
- a secondary portion from which the liquid from the diaphragm portion flows;
- a main valve comprising the diaphragm portion, configured to switch an interruption and a communication between the primary portion and the secondary portion;
- a back pressure chamber which is formed on a rear surface side with respect to a communication side of the primary portion and the secondary portion in the main valve;
- a primary auxiliary flow path which is formed in the main valve and allows the liquid to flow from the primary portion to the back pressure chamber so as to increase a pressure inside the back pressure chamber;
- a secondary auxiliary flow path which allows the liquid to flow from the back pressure chamber to the secondary portion;
- an auxiliary valve which switches an interruption and a communication between the back pressure chamber and the secondary auxiliary flow path;
- an auxiliary valve drive unit which drives the auxiliary valve so as to perform the switching by the auxiliary valve;
- and
- a main body portion which accommodates the main valve,
- wherein the secondary auxiliary flow path is formed so as to bypass the main valve,
- wherein in the main body portion, the secondary auxiliary flow path is formed between an outer surface of the main body portion and a fixed member to which the main body portion is fixed,
- wherein the fixed member comprises a tubular member configured to allow the liquid to flow therethrough,
- wherein the main valve includes a diaphragm which contacts a main valve seat portion and interrupts the primary portion and the secondary portion and a diaphragm plate which is fixed to the diaphragm and communicates the primary portion with the back pressure chamber, and
- wherein at least two openings of the secondary auxiliary flow path toward the secondary portion are located on an upstream side in relation to a downstream end portion of the diaphragm plate in the flow of the liquid of the secondary portion, which further comprises at least two distally opposed radial through flow paths that respectively exit at the at least two openings.
Dependencies are inferred from the claim text.