JPH02163582A - Fluid control valve - Google Patents

Abstract

PURPOSE:To permit the flow rate adjustment and reduce the consumed electric power by forming a small hole on both the first valve engaged with a shaft revolved electrically in a fluid passage and the second valve closely attached onto the first valve and opening and closing the passage according to the aligning and disaligning of the small holes by controlling the turn of the shaft. CONSTITUTION:A rotary shaft 8 revolved by a motor 10 controlled by a control circuit 11 is installed into a gas passage 5, and the first valve 6 having a small hole 6a is engaged with the rotary shaft 8. The second valve 7 having a small hole 7a is pressed by a spring 12, and closely attached onto the first valve 6, and fixed in the gas passage 5. The first valve 6 is turned by the rotary shaft 8, and the gas passage 5 is opened and closed according to the aligning and disaligning of the small holes 6a and 7a. When the valve stops in opening and closing, the consumption of electric power becomes zero, and the consumed electric power can be reduced. Further, the opening degree of the valve can be adjusted, and also the flow rate can be adjusted, different from the case of a solenoid valve. Further, since ceramics, etc., can be used, durability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fluid control valve used in a gas passage of a water heater or the like.

BACKGROUND OF THE INVENTION As shown in FIG. 3, a solenoid valve conventionally used in this type of water heater, etc., has a main valve 2 which opens a main valve seat 1a provided in a gas passage l, and a solenoid coil part 3. The control circuit 4 was used to open and close the switch.

Problems to be Solved by the Invention However, with the above configuration, when the main valve 2 is open, it is necessary to keep current flowing through the electromagnetic coil section 3, resulting in a problem of high power consumption. Was.

The present invention solves these conventional problems, and aims to reduce power consumption during use and save energy.

Means for Solving the Problems In order to solve the problems described above, the present invention provides a rotatable first valve having a small hole provided in a passageway and serving as a passage port for fluid, and an engaging portion with which a rotating shaft engages. , a fixed second valve that faces and is in close contact with the first valve and has a small hole that serves as a fluid passage port; a rotating shaft that engages with an engaging portion of the first valve; It has a drive means that is electrically driven and a control circuit that controls the drive means.

According to the present invention, with the above-described configuration, current is passed through the drive means only when opening and closing the passage for gas, etc., and no current is consumed when the drive means is held in the open state.

EXAMPLE Hereinafter, a gas valve section according to an example of the present invention will be described based on the drawings.

FIG. 1 shows the configuration of a water stop valve section of a water heater in an embodiment of the present invention. In FIG. 1, 5 is a gas passage. Reference numeral 6 denotes a first valve made of ceramic, and is provided with a small hole 6a that serves as a gas passage port and an engaging portion 6b that engages with the rotating shaft. The first valve 6 is rotatably provided in the gas passage 5.

Reference numeral 7 denotes a second valve, which is made of ceramic and has a small hole 7a that serves as a gas passage port, and is fixed to the gas passage 5 in close contact with the first valve 6. 8 is a rotating shaft that engages with the first valve 67 engaging portion 6b. 9 is an O-ring. The rotating shaft 8
is rotated by a motor 10 via a gear 13,
Then, the first valve 6 is rotated, and the gas passage 5 is opened and closed depending on whether the small hole 6a of the second valve 7 matches or does not match the small hole 7a of the second valve 7. Further, 11 is a control circuit that controls the rotation and stopping of the motor 10.

In the above embodiment, when the motor 10 does not rotate and the small hole 6a of the first valve 6 and the small hole 7a of the second valve 7 do not match as shown in FIG. 1, the gas passage 5 is normally closed. There is. When the first valve 6 is rotated by the motor 10, the small hole 6a of the first valve 6 and the small hole 7a of the second valve 7 are aligned, and the gas passage 5 is opened. Note that a spring 12 presses the second valve 7 via a valve holder 13. 14
is the 0 ring.

Effect of the invention As described above, according to the present invention, the following effects can be obtained.

(1) Since no power is consumed when the drive means is stopped, power consumption can be reduced whether the valve is opened or closed.

(2) Compared to conventional electromagnetic valve systems, it is possible to adjust the opening degree of the valve, so it is possible to adjust the flow rate.

(3) In the conventional solenoid valve system, the main valve was limited to rubber, which caused durability problems, but with the present invention, new materials such as ceramics can be used, dramatically improving durability. It is possible to improve the

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a fluid control valve according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same essential parts, and FIG. 3 is a longitudinal sectional view of a conventional electromagnetic valve. 5...Gas passage (fluid passage) 6...First valve, 6a...Small hole, 6b...Rotary shaft engagement part, 7... ...Second valve, 7a...Small hole, 8...Rotating shaft, 10...Motor (
drive means). Name of agent: Patent attorney Shigetaka Awano (1 person) 5-Karisu Tsukui Otsu-No. 74-month\name 7-2nd cell β-Rotation J-fO-1171/ff - 11th system a loan chart

Claims (1)

[Claims] a first valve that is rotatably provided in the fluid passage and has a small hole that serves as a fluid passage port and an engaging portion for a rotating shaft; and a small valve that faces and closely contacts the first valve and serves as a fluid passage port A fluid control valve comprising: a fixed second valve having a hole; a rotating shaft that engages with the first valve; a driving means for electrically driving the rotating shaft; and a control circuit for controlling the driving means.