JPS6014678A - Solenoid valve - Google Patents

Abstract

PURPOSE:To enhance the magnetic efficiency of a solenoid valve, by setting a coil on the upper surface of a non-magnetic material plate, and as wall by arranging a non-magnetic material housing so that it extend overlappingly from the top end of a stationary core to the lateral outer peripheral surface of a cup- shaped casing. CONSTITUTION:When a coil 30 is applied with voltage, the coil 30 produces magnetic force, and a magnetic circuit is established among a stationary core 23, a housing 32, a cup-shape casing 16 and a moving plate 26. Force is effected in the direction in which the gap between the stationaly core 23 and the moving plate 26 is decreased, and therefore, the moving plate 26 is attracted to the stationary core 23, overcoming the force of a spring 29, to open a valve port 18 so that an inlet pipe 20 and an outlet pipe 17 are communicated together. Further, when the applied voltage to the coil 30 is cut off, the force by the magnetic force becomes null, resulting in that the moving plate is pushed downward by the force of the spring 29, and therefore, a ball 27 blocks the valve port 18.

Description

[Detailed description of the invention] The present invention relates to a direct acting solenoid valve.

In recent years, two-way solenoid valves have been widely used for controlling refrigerant flow paths in refrigerant circuits.

As shown in Figure 1, the general structure of a conventional solenoid valve for refrigerant is as follows: A tube made of non-magnetic material ■, an outlet vibrator ■, and an inlet vibrator ■ are attached to the head of a valve seat assembly〇, which is brazed to the valve seat ■. Weld the suction element (■) to form a chamber (■), provide the valve seat (■) with a valve port (■) that communicates with each /< Eve, and the valve port (■).
A plunger [phase] equipped with a pole so as to block the
It consists of a valve coil [phase] inside a chamber with a spring @ interposed between it and an attractor ■, and is often used for flow path control in refrigerant circuits that require high airtightness and pressure resistance. ing.

However, the magnetic circuit in a solenoid valve with this structure is
Attractor ■, housing [phase] and plunger [phase]
It is composed of. Therefore, due to its structure, since the tube ■ made of non-magnetic material is interposed between the plunger [phase] and the housing 0, the thickness of the tube ■ and the clearance between the housing [phase] and the tube ■ are the magnetic circuit. The drawback was that it increased the magnetic resistance and deteriorated the magnetic efficiency.

In view of these drawbacks, an object of the present invention is to provide a solenoid valve that improves magnetic efficiency and consumes less coil power, that is, less power consumption.

An embodiment of the solenoid valve of the present invention will be described below with reference to FIG.

In Fig. 2, an outlet vibe @ is provided in the center of a cup-shaped casing [phase] made of magnetic material, a valve seat [phase] having a valve opening [phase], and an inlet vibe [phase] are provided near the outlet vibe ■; At the upper end of the cup-shaped casing [phase], a plate assembly [phase] having a fixed core [phase] made of a magnetic material penetrating through the central part [phase] of the plate [1] made of a non-magnetic material is provided to form a chamber [phase]. strain] and the chamber [
A moving plate [phase] in which the center part of a deep plate is raised in a cylindrical shape and the part facing the fixed core [phase] is flat is inserted into the inside of the moving plate [phase].
A port/I/[phase] is integrally provided on the valve seat side of the holder @, a spring [phase] is interposed between the moving plate [phase] and the plate assembly 0, and the non-magnetic material is A coil A/[phase] is arranged on the top surface of the plate @, and a housing [phase] of magnetic material is arranged so as to overlap from the upper end of the fixed core [phase] to the outer periphery of the side surface [phase] of the cup-shaped casing [phase]. Fixed core [phase] by Koi IV@
A magnetic circuit is formed between the housing [phase], the cup-shaped casing [phase] and the moving plate [phase],
It is characterized in that the moving plate [phase] is attracted to the fixed core [phase]. Note that the present invention is not limited to direct current solenoid valves, but as shown in Figure 8, a solenoid valve with a structure that can be applied to alternating current power supplies by providing a ring to remove dark circles at the lower end of the fixed core [phase]. It is a valve.

The solenoid valve having the above structure operates as follows.

When not energized, the pole ■ integrally provided on the moving plate [phase] closes the valve port [phase] of the multi-valve seat [phase] by the bias of the spring [phase].

Now, when a voltage is applied to the carp /L/[stock], the coil lv
＠ Magnetic force is generated, and the fixed core [phase], housing [
A magnetic circuit is constructed between the cup-shaped casing [phase] and the moving plate [phase], and a force acts in the direction of reducing the gap between the fixed core [phase] and the moving plate [phase], and the moving plate The [phase] is attracted to the fixed core [phase] against the force of the spring [phase], and the valve opening [phase] is attracted to the fixed core [phase].
When the phase] is in an open state, the inlet vibe [phase] and the outlet vibe [phase] are in a conductive state.

Also, when the voltage applied to the coil [phase] is cut off, the magnetic force disappears, the shim-ping plate [phase] is pushed downward by the force of the spring [phase], and the pole [phase] Block [phase].

The solenoid valve of the present invention having the structure and operation as described above can be designed to have the pressure resistance particularly required for a refrigerant solenoid valve without reducing operability. Regarding pressure resistance, the portion corresponding to the cylindrical portion can generally maintain sufficient strength, but the portions corresponding to the head plates of the pressure vessel at both ends of the cylinder are required to have a corresponding thickness.

When the outer diameter of the casing is large as in the embodiment of the present invention, the pressure receiving area in the axial direction is large, and therefore, the axial force is large and the casing will not have sufficient strength unless the wall thickness is large.

In the solenoid valve of the present invention, even if the thickness of the casing is increased, since the magnetic material itself is used,
Compared to conventional solenoid valves that generally use non-magnetic materials, it is possible to design sufficient pressure resistance without reducing magnetic efficiency. From the above, the solenoid valve of the present invention has the following advantages.

1. Since magnetic material is used for the casing, the gap in the magnetic closed circuit (the gap between the housing, casing, and moving plate) can be minimized, reducing magnetic resistance and increasing magnetic efficiency. It is possible to improve

1. Magnetic material is used for the casing, which is sometimes a problem in terms of strength in closed containers, so even if the thickness of the casing is increased, the magnetic efficiency will not decrease, and therefore a design with sufficient pressure resistance is possible. O This solenoid valve with the above features is useful and fully meets the needs of the refrigeration and air conditioning industry.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional solenoid valve, and FIGS. 2 and 8 are longitudinal sectional views of the solenoid valve of the present invention. In the diagram, ■ is a tube, ■ is an outlet vibe, ■ is an inlet vibe, ■ is a valve seat, ■ is a valve seat assembly, ■ is an aspirator, ■ is a chamber, ■ is a valve opening, ■ is a pole, and [phase] is Plunger, ■ is spring o is main body, o is coil, ■ is housing. [Phase] is a solenoid valve coil, [Phase] is a cup-shaped casing,
■ is the outlet vibrator, [phase] is one valve port, [phase] is the valve seat, [phase] is the inlet vibe, [phase] is the plate, the center of the @sha plate, [phase] is the fixed core, ■ is the plate absea, [phase] is chamber, [phase] is moving plate, [phase]
is the pole, [phase] is the holder, [phase] is the spring, [
[Phase] indicates the coil, [Phase] indicates the outer periphery of the side surface of the cup-shaped casing, [Stock] indicates the housing, and [Stock] indicates the bear sill. Patent applicant: Taiheiyo Kogyo Co., Ltd.

Claims (1)

[Claims] A valve seat [phase] having an outlet vibrator @ and a valve opening [phase] in the center of a cup-shaped casing [phase] made of magnetic material, and an inlet vibe [stock] near the outlet vibe @. A plate assembly [phase] is provided at the upper end of the cup-shaped casing [phase], and a fixed core [phase] of a magnetic material is provided at the upper end of the cup-shaped casing [phase], and a fixed core [phase] of a magnetic material is arranged to penetrate through the central part [phase] of the plate O of a non-magnetic material. Forming a techamper [phase], K inside the chamber [phase]. The center of the deep dish is cylindrical and the bottom is raised to form the fixed core [phase].
A moving plate [phase] whose opposing portion is flat is inserted, a pole [phase] is integrally provided on the valve seat side of the moving plate [phase] with a holder @, and the moving plate [phase] A spring is interposed between the plate assembly 0 and a coil is placed on the upper surface of the plate of the non-magnetic material, and the side surface of the cup-shaped casing is connected from the upper end of the fixed core to the upper surface of the cup-shaped casing. A housing [phase] of magnetic material is arranged so as to overlap the outer peripheral part [phase],
The coil/I/[phase] constitutes a magnetic circuit between the fixed core [phase], the housing [phase], the cup-shaped gauging [phase], and the moving grate ([phase], and the moving plate [phase] is connected to the fixed core [phase]). A solenoid valve characterized by being designed to attract air to [phase].