Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1988-12-27
1990-12-18
Rosenthal, Arnold
Valves and valve actuation
Electrically actuated valve
Including solenoid
251294, 251339, 222504, 222529, F16K 3110
Patent
active
049781014
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a solenoid controlled valve for liquid preparation in which an electromagnetic force drives the plunger to release the valve body from the valve seat, causing the valve to be opened or closed, thereby to control the flow of a liquid.
In a conventional solenoid controlled valve for liquid preparation, an electromagnetic drive unit including a plunger to be driven by an electromagnetic force generated by the coil, is disposed in the vicinity of a valve unit including a valve body pressingly contacted with the valve seat by a spring. The plunger of the electromagnetic drive unit is connected to the valve body of the valve unit by a valve rod having rigidity.
When using solenoid controlled valves for liquid preparation, it is required to gather, at one place, the tips of the pipes for supplying liquids used for preparation. Accordingly, the pipes have been conventionally extended to a long distance from the valve units of the solenoid controlled valves. When the pipes are extended to a long distance from the valve units, the liquids may remain in and stick to the insides of the pipes, thus failing to achieve an accurate preparation.
Further, when the valve unit is disposed in the vicinity of the electromagnetic drive unit, the heat of the coil is transferred to the valve body through the valve rod. Accordingly, some liquids to be controlled may be dried and solidified, due to this heat, between the valve seat and the valve body. This causes the liquid concentration to vary, failing to assure an accurate preparation.
In view of the foregoing, it is an object of the present invention to provide a solenoid controlled valve for liquid preparation in which the liquid does not remain in the liquid supply pipe and is not dried and solidifed at the valve unit, thus assuring an accurate liquid preparation.
SUMMARY OF THE INVENTION
To achieve the object above-mentioned, the solenoid controlled valve for liquid preparation in accordance with the present invention, comprises;
an electromagnetic drive unit including a plunger to be driven by an electromagnetic force of a coil; and valve body pressingly contacted with a valve seat by a spring.
The electromagnetic drive unit and the valve unit are connected to each other by a tubular member, at the tip of which the valve unit is disposed. The valve body is connected to the plunger by a linear member inserted in and passing through the inside of the tubular member.
According to the solenoid controlled valve for liquid preparation of the present invention, the valve body and the plunger are connected to each other by the linear member. Accordingly, when an electromagnetic force acts on the plunger, causing the same to be driven, the valve body releases the valve seat to form a liquid passage. On the other hand, when the electromagnetic force does not act on the plunger, the valve body pressingly contacted with the valve seat by a spring closes the valve seat, thereby to close the liquid passage. Further, the electromagnetic drive unit and the valve unit are connected to each other by the tubular member, and the valve unit is disposed at the tip end of the tubular member. Accordingly, the liquid supply pipe connected to the valve unit may be shortened in length or even omitted. This prevents the liquid having passed through the valve unit, from remaining inside of the pipe, assuring an accurate liquid preparation.
According to the solenoid controlled valve for liquid preparation of the present invention, the electromagnetic drive unit and the valve unit are separated from each other, and the valve body and the plunger are connected to each other by the linear member. This prevents the heat of the coil at the electromagnetic drive unit from being easily transferred to the valve body of the valve unit. Thus, the liquid is not dried and solidified at the valve unit, further assuring an accurate liquid preparation.
The solenoid controlled valve for liquid preparation according to the present invention may be arranged
REFERENCES:
patent: 3072302 (1963-01-01), Giovannoni et al.
patent: 4187987 (1980-02-01), Rave
patent: 4463659 (1984-08-01), Nelson
Nakaya Toshitaka
Sumida Kenji
Rosenthal Arnold
Washi Kosan Co., Ltd.
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