Title:
EXPANSION VALVE
Document Type and Number:
Japanese Patent JPS59137676
Kind Code:
A
Abstract:
PURPOSE:To prevent a valve from any influence due to hysteresis, by installing permanent magnet and a solenoid coil between a pipe provided at the outside of a hollow shaft and installed so as to wrap both of a nozzle hole and a flow port and a closed end part of the shaft. CONSTITUTION:When a pulse signal is impressed on a solenoid coil 2, a plunger 3 moves up and down due to a relationship between electromagnetic force and resilient force of springs 25 and 26 whereby opening at an average time in a nozzle hole 18 of a hollow shaft 21 varies to some extent and the nozzle hole 18 will not come to its halfway opening so that there is no influence of hysteresis. The pulse signal is given to the coil 2 so as to cause it become the same direction as a line of magnetic force of a permanent magnet 29, and when a flow port 19 is opened by making a sucker 22 attract a plunger, a refrigerant flows into a pipe 24 from an opening part 27 with no flow resistance, while if the pulse signal is given to the coil 2 so as to cause it to become the opposite direction to the line of magnetic force of the permanent magnet 29, the flow port 19 is closed.
Inventors:
HAYASHI MASAKATSU
FUJIE KUNIO
IWAI KAZUMI
OKAMOTO YOSHIO
YOKOI KAZUAKI
FUJIE KUNIO
IWAI KAZUMI
OKAMOTO YOSHIO
YOKOI KAZUAKI
Application Number:
JP1152683A
Publication Date:
August 07, 1984
Filing Date:
January 28, 1983
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F16K31/68; F16K31/08; F25B41/06; (IPC1-7): F16K17/38
Attorney, Agent or Firm:
Akio Takahashi