JPS604878U

JPS604878U - expansion valve

Info

Publication number: JPS604878U
Application number: JP9669083U
Authority: JP
Inventors: 政克林; 和明横井; 松尾　一也; 喜久治高橋
Original assignee: 株式会社日立製作所
Priority date: 1983-06-24
Filing date: 1983-06-24
Publication date: 1985-01-14

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の制御弁の断面図、第２図は第１図の制御
弁における入力電圧とプランジャ変位量との関係を示す
線形図、第３図は従来の膨張弁である熱電膨張弁の断面
図、第４図から第７図は本考案を説明するための図で、
第４図は本考案に使用される膨張弁の一実施例を示す縦
断面図、第５図、第６図は第４図に示した膨張弁の電磁
石に印加される入力パルスの波形図、第７図は本考案に
よる実験例を示す周波数の変化と流量の変化を示す関係
図、第８図、第９図はズルロとプランジャの関係を示す
断面図である。１・・・弁本体、２・・・電磁コイル、３・・・プラン
ジャ、１８．１９・・・ノズル口、２０・・・均圧口、
２１゜２２・・・スプリング。Figure 1 is a cross-sectional view of a conventional control valve, Figure 2 is a linear diagram showing the relationship between input voltage and plunger displacement in the control valve of Figure 1, and Figure 3 is a thermoelectric expansion valve, which is a conventional expansion valve. The sectional views of FIGS. 4 to 7 are diagrams for explaining the present invention.
FIG. 4 is a longitudinal sectional view showing one embodiment of the expansion valve used in the present invention, FIGS. 5 and 6 are waveform diagrams of input pulses applied to the electromagnet of the expansion valve shown in FIG. 4, FIG. 7 is a relationship diagram showing changes in frequency and changes in flow rate, showing an experimental example according to the present invention, and FIGS. 8 and 9 are cross-sectional views showing the relationship between the Zurro and the plunger. 1... Valve body, 2... Electromagnetic coil, 3... Plunger, 18.19... Nozzle port, 20... Pressure equalization port,
21°22...Spring.

Claims

[Scope of utility model registration request]

Inside the valve body, which is a hollow cylinder whose both ends are closed and has two nozzle ports on the side wall: a nozzle port for first-stage expansion and a nozzle port for second-stage expansion, a valve is installed between both end surfaces. A plunger with a connecting pressure equalizing port is held by a spring at both ends, and the plunger is held movable in the axial direction of the valve body, and a pipe is connected to each of the two nozzle ports to prevent the internal fluid from leaking to the outside. What is claimed is: 1. An expansion valve characterized in that an inlet/outlet to the valve is formed by closely joining the valve body, and an electromagnetic coil is provided outside the valve body.