Fluid control valve

摘要

A fluid control valve includes a body portion provided at a circulation flow passage that circulates fluid between an internal combustion engine and a heat exchanger, an inflow passage, an outflow passage, a valve element, a valve seat including a contact portion relative to the valve element, the contact portion being provided to face a downstream side of a circulating direction of the fluid, a solenoid causing the valve element to make contact with the valve seat in a state where the solenoid is supplied with an electric power, and a spring mechanism holding the valve element to be balanced at a position at which the valve element is away from the valve seat by a predetermined distance in a case where the solenoid is inhibited from being supplied with the electric power and the fluid is inhibited from flowing.

主权项

1. A fluid control valve comprising:
a body portion provided at a circulation flow passage that circulates fluid between an internal combustion engine and a heat exchanger; an inflow passage causing the fluid to flow into the body portion; an outflow passage causing the fluid to flow out of the body portion; a valve element adjusting a flow rate of the fluid; a valve seat including a contact portion relative to the valve element, the contact portion being provided to face a downstream side of a circulating direction of the fluid; a solenoid causing the valve element to make contact with the valve seat in a state where the solenoid is supplied with an electric power; a spring mechanism holding the valve element to be balanced at a position at which the valve element is away from the valve seat by a predetermined distance when the solenoid is inhibited from being supplied with the electric power and at the same time the fluid is inhibited from flowing; the spring mechanism including a first coil spring biasing the valve element to approach the valve seat and a second coil spring biasing the valve element to separate from the valve seat; and an outside diameter of the second coil spring being larger than an outside diameter of the first coil spring; and one end of the second coil spring being located at an outer peripheral side of the valve seat.