SOLENOID VALVE WITH COIL COOLING BY OPERATING FLUID

PURPOSE: A solenoid valve with a coil cooling method using working fluid is provided to form a cooling passage covering a solenoid and to cool the solenoid by transferring low temperature working fluid, expanding some of the working fluid, to the cooling passage. CONSTITUTION: A solenoid valve with a coil cooling method using working fluid comprises a valve body, a poppet(200), a solenoid(300), a solenoid cover(310), an discharge port(420), an auxiliary passage(140), and a throttling device(500). The valve body comprises an inlet port, an outlet port, and a fluid passage interconnecting the inlet port and the outlet port. The poppet opens and closes the fluid passage by lifting. The solenoid is connected to the poppet to lift the poppet according to the supply of power. The solenoid cover is installed to cover the solenoid and a cooling passage is formed between the solenoid and the solenoid cover. The discharge port is formed in the solenoid cover to discharge the fluid in the cooling passage to the outside. The auxiliary passage is formed in the valve body to interconnect the fluid passage and the cooling passage and selectively connects by the lift of the poppet. The throttling device is formed in a boundary of the auxiliary passage and the cooling passage.