JP2002250464A - Alternating current electromagnetic type water supply valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of which the direct acting valve method of direct current electromagnetic type feed water valve is costwise disadvantageous compared to an alternating current electromagnetic type feed water valve, because supplementary parts such as stationary iron core, diode and the like are required and also because the conventional pilot valve method of the alternating current electromagnetic type feed water valve is not suitable for closing or opening a small amount of water flow of less than 1 liter per a minute even though there is increased requirement which desires to add spray function of a minute flow amount of the water in dry process and the like, without incurring cost to a household electrical appliance, which is low-cost band, such as fully automatic washing machines, dishwashers, showers and toilets and so on, and which install pilot valve method of the alternating-current electromagnetic type feed water valve driven by AC 100 V, in order to discriminate a commodity in recent days. SOLUTION: The valve is configured as a quasi-pilot valve method of an alternating-current electromagnetic type feed water valve by altering the diaphragm valve, comprising a soft diaphragm and hard disk and by employing a valve body of the conventional pilot valve method of the alternating-current electromagnetic type feed water valve, a guide case, the pilot valve, a plunger, a solenoid and the like intact therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pilot orifice of a diaphragm valve which is installed in a water supply piping line for tap water or the like (hereinafter referred to as a line) and is connected to a plunger by a pilot valve (valve element). By opening and closing,
Based on a pilot valve type AC electromagnetic water supply valve that opens and closes the main valve seat by interlocking a diaphragm valve, it is modified to a direct acting valve type AC electromagnetic water supply valve. The present invention relates to a water supply valve, and more particularly, to improvement of reliability of water supply of a small flow rate by opening and closing a pilot valve at the time of energized water flow, and improvement of function maintenance of a flow rate adjustment component.

[0002]

2. Description of the Related Art Conventionally, for example, a 100 V AC (5 V) commercial power source mounted on household electric equipment (for example, a washing machine, a drying washing machine, a dishwasher / dryer, a water heater, a local washing device, etc.) has been used.
A normally closed pilot valve type AC electromagnetic water supply valve (hereinafter referred to as a conventional valve) driven at 0 Hz and 60 Hz.
There are simplex, double, triple and quadruple systems. ) Is such that the main valve seat is closed to a valve body in which the inflow port, the inflow pipe, the inflow chamber, the main valve seat, the outflow pipe, and the outflow port are integrally formed with a synthetic resin molded member (for example, polypropylene resin). A soft diaphragm valve (valve element) is installed, and a guide case (inside is called a back pressure chamber) of a synthetic resin molded member (for example, nylon resin) so as to press a liquid-tight packing portion of the diaphragm valve against the valve body. And a hard magnetic member to which a soft pilot valve (valve element) of an elastic member (for example, silicone rubber) is fixed so that a pilot orifice of the diaphragm valve is closed on an inner peripheral portion of the guide case. (For example,
A plunger of a stainless steel rod) and a coil spring (for example, a stainless steel wire) that constantly urges the plunger are housed. A copper wire called a magnet wire (for example, Enamel wire) is wound around a cylindrical bobbin (eg, nylon resin) and connected to a terminal strip (eg, Faston terminal # 250) or a lead wire (electric wire) (eg, soldering, fusing, spot welding, laser welding). And an electrical insulating material (for example, an adhesive sealing material such as a polyester resin, an epoxy resin, a silicone resin, a urethane resin, and the like, including those for other materials such as a waterproofing material, a moistureproofing material, and a dew condensation preventing material). Sealed with
2. Description of the Related Art There is known a configuration in which a solenoid (coil) surrounded by a yoke is installed.

[0003] In the outer peripheral portion of the inflow port, for example, the thread connection and the diameter of a water supply hose and the like are standardized in the industry, such as a nominal diameter of a threaded joint PT3 / 4 and a nominal diameter of 20, for example.
There are industry-defined threads (eg, 10 peaks). The inner periphery of the inlet (the pressure of water flowing from the line is referred to as a primary pressure or a high pressure side) is provided with a curved metal of about 60 mesh to prevent foreign matter (for example, insects, sand, iron chips, etc.) from entering. In many cases, a filter or the like is provided. However, the present invention is not limited to this. For example, a resin filter may be provided as disclosed in Japanese Utility Model Laid-open No. Sho 57-144678.
Further, for example, as disclosed in Japanese Patent Application Laid-Open No. 2-266179, a double curved metal filter or the like may be provided. If there is backflow, etc., for example,
Japanese Utility Model Laid-Open No. Hei 5-22957, Japanese Patent Laid-Open No. Hei 7-151252
In some cases, a curved metal filter is provided on the inner peripheral portion of the outlet as disclosed in Japanese Patent Application Laid-Open Publication No. H10-163,036.

[0004] In addition to the above-mentioned curved metal filter, a flow rate adjusting part or the like is provided on the inner peripheral portion of the inlet so that the flow rate becomes substantially constant irrespective of the primary pressure (dynamic pressure of the line). There are many. Although there are exceptions, in the case of a flow regulating component in which the predetermined flow rate is a small flow rate of less than 10 L / min, for example, Japanese Utility Model Publication No. 59-28796 and Japanese Utility Model Publication No. 62-18787
As disclosed in Japanese Unexamined Patent Publication (Kokai) No. H07-205, a hard cup of a synthetic resin molded member (eg, polyphenylene oxide resin, polyphenylene ether resin, polyacetal resin) is provided on the upstream side, and an elastic member (eg, nitrile rubber) is provided on the downstream side.
(Hereinafter referred to as flow control, which does not have a conical inclined concave shape formed by chamfering a substantially central through hole). Is common.

When the primary pressure is supplied to the flow regulating component at a low water pressure (for example, 0.05 to 0.10 MPa [megapascal] or less), the hard cup slightly presses the floorcon by the water pressure. Therefore, the flowing water passages provided in the hard cup (for example, a V-shaped groove, a stepped concave groove, and the like in the case of a peripheral installation, a through-hole, and the like in the case of a substantially central portion) are secured as they are. , Water of a predetermined amount or less passes through. The primary pressure is medium water pressure (for example, 0.10
When the pressure is supplied at about 0.50 MPa), the hard cup presses the floor controller more strongly than at the time of low water pressure by water pressure, and the floor controller bites into the flow path provided in the hard cup, and the flow path is Is narrowed, and a predetermined amount of water or less passes through. Further, when the primary pressure is supplied at a high water pressure (for example, 0.50 to 0.75 MPa or more), the hard cup almost bites into the flowcon due to the water pressure, and the flowing water passage is almost blocked, A predetermined amount of water or less will pass through. There are exceptions, but the prescribed flow rate is 10
In the case of a medium flow rate or a large flow rate of about 35 L per minute from L, for example, the actual flow rate is 2-102744.
As shown in FIG. 6 and FIG. 7 of the publication, a through-hole (also referred to as an orifice, which is a flowing water pipe) substantially at the center of both end surfaces bends due to a change in water pressure or a flow rate of a fluid. A flexible annular disk (hereinafter, referred to as a flow sheet) made of an elastic member (for example, nitrile rubber) having a conical inclined concave shape formed so that the cross-sectional area of the flowing water pipe is easily changed, and a synthetic resin, although not required. Molded members (for example,
Hard collar made of polypropylene resin or polyacetal resin (supports the flow sheet to prevent fly-out during backflow.)
It is common to install a flow rate adjusting component composed of With respect to the flow rate adjusting component, the flow sheet is bent and deformed due to a change in water pressure or a flow rate of the fluid, so that the flow pipe, which is the substantially central through-hole, is narrowed, and a predetermined amount of water or less flows therethrough. Will be.

[0006] In a conventional double valve, for example, as disclosed in Japanese Utility Model Publication No. 62-29073,
In some cases, a large flow rate through-hole and a medium flow rate through-hole are provided, and a flow rate adjusting component or the like that separates the pipeline in the inflow pipeline is provided.

Further, in the conventional valve, it is common to arrange a flow rate adjusting component on the inner peripheral portion of the inflow port as described above. For example, Japanese Utility Model Application Laid-Open No. 56-136686, registered utility model No. 3021488. In some cases, as disclosed in Japanese Patent Application Laid-Open Publication No. H10-205, a flow rate adjusting component is provided on the inner peripheral portion of the inflow pipe or the outflow port.

The inflow conduit is a passage for guiding the water at the inflow port to the inflow chamber, and makes it easy for cavitation to occur in the inflow conduit (ensure a water hammer pressure for floating the diaphragm valve from the main valve seat). In many cases, the pipeline is lengthened. In addition, since the flow of water becomes turbulent in the flow regulating component, it is necessary to rectify the flow once to make cavitation more likely to occur. ) Is often provided.

The inflow chamber is a chamber surrounded by the inner wall of the valve body and the outer periphery of the outflow pipe, and has a function of transmitting water pressure to the diaphragm valve. Usually, the cavitation generated in the inflow pipe is lost in the inflow chamber.

The main valve seat is an end face (inlet) of an outflow pipe (referred to as a pipe in the inflow chamber). In order to improve the water stopping performance, the diaphragm valve is shaped so that it can easily bite.

The outlet is the outlet of the outlet pipe, but refers to the pipe on the outer periphery of the valve body. On the outer peripheral portion of the outlet, there is an annular convex portion (rib) or the like for preventing a water supply hose or the like from coming off.

The diaphragm valve is provided, for example, with at least one small hole and one medium hole provided in a soft diaphragm made of an elastic member (eg, silicon rubber), and one surface of a hard disk made of a synthetic resin molded member (eg, polyacetal resin). (See, for example, registered utility model No. 3)
As disclosed in Japanese Patent Publication No. 010806 or the like, a plurality of small holes and small projections may be provided and fitted and connected. The small projection protrudes from the outer periphery of the diaphragm valve, and a side orifice (also referred to as a small hole or a bleed hole) penetrating the inflow chamber and the back pressure chamber (inside the guide case).
The central projection of the diaphragm valve has the central projection protruding therefrom, and is provided with the back pressure chamber and a pilot orifice (hole) passing through the back pressure chamber outlet. A rectifying blade for rectifying the flow of water when water flows is provided on the outer periphery of the middle projection.

When an alternating current is applied to the solenoid (normally, a voltage of 100 V is applied to excite the solenoid), the plunger is attracted to a substantially central portion in the guide case installed inside the solenoid. Thus, the pilot valve closing the pilot orifice is released. Then
Water from the inflow chamber flows into the back pressure chamber from the side orifice, passes through the pilot orifice, the back pressure chamber outlet, and out to the outlet line and the outlet. When this passage is opened, the diaphragm valve slightly floats from the main valve seat due to the decrease in the pressure of the water in the back pressure chamber and the pressure of the water in the inflow chamber.
The water flowing into the back pressure chamber from the side orifice contracts once at the side orifice, so that the pressure is reduced and cavitation occurs. The water in the back pressure chamber is
Sudden pressure rise (water hammer pressure) occurs due to the disappearance of cavitation, and the diaphragm valve floating from the main valve seat is constantly depressed while flowing out to the outflow pipe and the outflow port. Presumed. And, since most of the water in the inflow chamber flows out to the main valve seat, the outflow pipe, and the outflow port, the hydrostatic water in the line falls to the dynamic water pressure and becomes a flowing state. Due to the flow control components for flow control arranged on the inner periphery of the inflow port, the water is once contracted, the pressure is reduced, and cavitation occurs in the inflow pipe, which disappears in the inflow chamber, and suddenly disappears. Pressure rise (water hammer pressure)
It is estimated that the diaphragm valve is floating from the main valve seat. Further, a pressure wave or the like generated due to a rapid pressure rise is not propagated to the line side (or the propagation amount is small) since the flow of water flows out from the inlet through the flow path of the outlet. ) Is assumed. Therefore, during the valve opening operation of the conventional valve, the hydraulic pressure of the line (decreases when the flow rate is large)
Is stable. As a reference, when the flow rate adjusting component is not installed, the pressure loss (= primary pressure−secondary pressure) of the conventional valve at the line hydraulic pressure is 0.01 MPa to 0.02 MPa.
Since the pressure is MPa, it can be seen that the pressure almost recovers to the primary pressure after the cavitation disappears.

Next, when the flow of the alternating current to the solenoid is stopped (normally, the voltage of 100 V AC is cut off and demagnetized), the plunger is returned to the normal position by the coil spring, and the pilot valve is moved to the pilot valve.・ Close the orifice. Then, the water flowing into the back pressure chamber from the side orifice loses its destination, but as described above, a sharp pressure rise (water hammer pressure) occurs in the back pressure chamber due to disappearance of cavitation. Therefore, the diaphragm valve floating from the main valve seat is pressed against the main valve seat. Then, the main valve seat is suddenly closed by the diaphragm valve to stop water, and the water in the inflow chamber cannot flow into the back pressure chamber from the side orifice, and the valve closing operation of the conventional valve is completed. I do.

For example, a recent fully automatic washing machine or the like is supplied with, for example, an electromagnetic water supply valve unit for supplying a large flow of water to a washing (dewatering) tub and a medium flow of water for rinsing. An electromagnetic water supply valve unit, an electromagnetic water supply valve unit that supplies a small amount of water for dissolving detergents and rinsing agents, and an electromagnetic water supply that supplies a small amount of water that is sprayed simultaneously with hot air blowing during the drying process There has been an increasing demand for the development of a multi-unit (combination of two, three, four, etc.) pilot valve type electromagnetic water supply valves in which a valve unit is integrated.

[0016]

However, as described above, a pilot valve type AC electromagnetic type water supply valve is suitable for opening and closing hydrostatic pressure water in a line from a small flow rate to a large flow rate. Since it is not suitable for opening and closing water having a very small flow rate, for example, as disclosed in Japanese Patent Application Laid-Open No. 2000-220768, an AC electromagnetic water supply valve of a pilot valve type and a plunger with a valve element are used. A direct-acting valve-type DC electromagnetic water valve that directly opens and closes the valve seat that communicates with the outlet,
Are combined to form a multiple AC / DC electromagnetic water supply valve, but there is a problem in that modification of the valve body and additional parts such as a fixed iron core are required, resulting in an increase in cost. Also, there is a problem that both AC and DC power supplies are required for the exciting current of the solenoid. Even if a direct current in which alternating current is full-wave rectified by a diode or the like is used, there is a problem that additional components such as a diode are required and the cost is increased.

Although there are exceptions, in a multiple solenoid type water supply valve, a flow rate adjusting part for a minute flow rate of less than 1 L / min is separately provided for a direct-acting valve type electromagnetic water supply valve. There is a problem that it cannot be installed.

In order to prevent a spray port provided in a drying mechanism or the like of a fully automatic drying washing machine or the like from being separated from water for a small flow rate to a large flow rate, for example, Japanese Utility Model Publication No. 5-12544 and the like. As disclosed, 1
If parts such as an annular filter having a size of about 00 mesh are arranged in the inflow chamber or the like, there is a problem that the cost is increased.

The present invention has been made in view of such problems of the prior art, and has as its object to divert the valve body of a pilot valve type AC electromagnetic water supply valve as it is, It is an object of the present invention to provide an AC electromagnetic water supply valve which can be easily changed to a direct-acting valve type AC electromagnetic water supply valve, and can be expected to maintain the water supply reliability of a small flow rate, and to maintain the functions of a flow control part and a spray port.

[0020]

In order to achieve the above object, an AC electromagnetic water supply valve according to the present invention comprises an inflow chamber through which water flows, an inflow pipe, an inflow chamber for transmitting water pressure to a diaphragm valve, A diaphragm valve composed of a soft diaphragm and a hard disk is installed on a valve body integrally formed with a main valve seat, an outflow pipe, and an outflow port through which water flows out, so as to close the main valve seat. A plunger to which a pilot valve is fixed is pressed so as to press the guide case so as to press the liquid-tight packing portion of the diaphragm valve, and to close the orifice for minute flow rate of the diaphragm valve on the inner peripheral portion of the guide case. A pseudo-pilot valve type AC electromagnetic direct-acting water supply valve, which is configured by housing a coil spring that constantly urges the plunger and a solenoid is installed on the outer periphery of the guide case. Characterized in that was.

In detail, a metal mesh of about 100 mesh for preventing minute foreign matter from being interposed between the soft diaphragm having a plurality of through holes and the hard disk having a plurality of through holes. It is characterized by wearing.

In a conventional diaphragm valve in which small projections are eliminated, a watertight packing is arranged around the middle projection of the hard disk and inserted into the inner peripheral portion of the outflow pipe, and the main valve of the diaphragm valve is inserted. The opening and closing of the valve seat is invalidated.

Also, a curved metal filter of about 100 mesh for preventing the entry of fine foreign matter and a flow rate adjusting component for controlling the flow rate are provided on the inner peripheral portion of the outflow pipe. Further, it may be provided not at the inner periphery of the outflow conduit but at the inner periphery of the outlet.

Alternatively, the AC electromagnetic water supply valve of the present invention comprises an inflow chamber, a main valve seat, an outflow pipe, and an outflow pipe for transmitting water pressure to an inflow port, an inflow pipe, and a diaphragm valve into which water flows. A watertight packing is mounted on a hard cap having a small flow rate orifice so as to close the main valve seat in a valve body integrally formed with an outflow port, and inserted into an inner peripheral portion of the outflow pipe. A plunger to which a pilot valve is fixed so that the orifice for minute flow rate of the hard cap is closed on the inner peripheral portion of the guide case so as to press the liquid-tight packing material. An ac electromagnetic direct-acting water supply valve of a pseudo pilot valve type configured by installing a solenoid on the outer periphery of the guide case is housed, and a coil spring that constantly urges the plunger is urged. Inside the outlet Characterized in that a curved-shaped metallic filter and a flow regulating components parts.

[0025]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an AC electromagnetic direct-acting water supply valve 1 of a single type normally closed type pseudo pilot valve type according to an embodiment of the present invention.
FIG. 2 is a front vertical cross-sectional view when a valve 0 (hereinafter, the AC valve 10) is closed. FIG. 2 is a front vertical cross-sectional view when the AC valve 10 is opened. In the present AC valve 10, the inlet 1 into which water flows
1. A valve body 17 integrally formed with an inflow chamber 13, a main valve seat 15, an outflow pipeline 14, and an outflow port 16 through which water flows out, the inflow chamber 12, which transmits water pressure to the diaphragm valve 30, and the outflow port 16 through which water flows out (conventional product: synthetic The main valve seat 1 may be made of resin or brass.
The diaphragm valve 30 is installed so as to close the valve 5, and the liquid-tight packing portion 33 of the diaphragm valve 30 is attached to the valve body 17.
The guide case 40 (conventional product) is pressed so as to press, and the orifice 31 for the small flow rate of the diaphragm valve 30 is closed on the inner peripheral portion of the guide case 40.
A plunger 42 (conventional product) to which a pilot valve (valve element) 41 (conventional product) is fixed, and a coil spring 43 (conventional product) that constantly urges the plunger 42 are housed. A solenoid 47 (conventional product) in which a copper wire 44 is wound around a cylindrical bobbin 45 and connected to a terminal strip 46 is provided on the outer peripheral portion of the solenoid. The inflow port 11 may be provided with a conventional product such as a curved metal filter 50 for inflow of about 60 mesh for preventing foreign matter from entering, a collar 51, and an annular disk (flow sheet) 52 as necessary.

The diaphragm valve 30 is provided with at least one (or eight in this embodiment) diaphragm orifices (through holes) 22 and one middle hole. For example, a soft diaphragm made of an elastic member (for example, silicon rubber) is provided. 21
A hard disk 25 made of, for example, a synthetic resin molded member (for example, polyacetal resin) provided with at least one (eight in this embodiment) disk orifices (through holes) 26 and one middle protrusion 27; A metal flat mesh 29 of about 100 mesh for preventing foreign matter from entering is sandwiched between the soft diaphragm 21 and the hard disk 25.
Are connected by inserting the middle protrusion 27. An orifice (through hole) 31 having a small flow rate of, for example, 0.7 mm in diameter is provided at a substantially central portion of the middle projection 27.

A watertight packing (for example, an O-ring) 28 is mounted around the outer periphery of the middle projection so that water is not supplied at a predetermined flow rate of less than 1 L / min. And the opening and closing of the main valve seat 15 is invalidated.

A curved metal filter 53 of about 100 mesh for preventing the entry of fine foreign matter is provided on the inner peripheral portion of the outflow pipe 14.
(A flat net shape may be used, but terminal treatment on the outer periphery is required.) And a flow rate adjusting component 56 for flow rate control (for example, a cup 54,
It consists of an annular disk 55 and the like. Conventional products are good. Watertight packing or the like may be provided around the outer periphery of the cup 54 to prevent vibration noise. ). Further, it may be provided not at the inner periphery of the outflow pipe 14 but at the inner periphery of the outlet 16. Although not shown, a support member 65 or the like may be inserted (press-fitted) into the inner peripheral portion of the outflow port 16 in order to prevent the flow rate adjusting component 56 from jumping out. 17 may be integrally formed.

As an operation, when an alternating current is applied to the solenoid 47 (normally, a voltage of 100 V is applied to excite the solenoid 47), a substantially central portion in the guide case 40 installed inside the solenoid 47 is operated. Then, the plunger 42 is sucked, and the pilot valve (valve element) 41 closing the micro flow rate orifice (valve seat) 31 is separated. And
The water in the inflow chamber 13 flows into the back pressure chamber 34 through the diaphragm orifice 22, the metal mesh 29 and the disk orifice 26, passes through the orifice 31 for minute flow rate, the outflow line 14, and the outflow port. Flow out to 16.

Next, when the flow of the alternating current to the solenoid 47 is stopped (usually, a voltage of 100 V AC is cut off and demagnetized), the plunger 42 is returned to the normal position by the coil spring 43 and the pilot valve is returned. 41 closes the micro flow orifice 31 to stop the water.

In the present AC valve 10, the conventional valve body 1
7. The guide case 40, the pilot valve 41, the plunger 42, the solenoid 47, and the like can be diverted as they are, and a predetermined flow rate of less than 1 L per minute is supplied by the metal mesh 29 and / or the curved metal filter 53. The reliability and the maintenance of the function of the spray port provided in the drying mechanism of the flow rate adjusting component 56 and the fully automatic drying washing machine can be expected. Then, it is possible to easily replace the conventional valve without changing the hardware and / or software of the electric control system of the household electric appliance.

FIG. 3 is a front vertical cross-sectional view of a single-type normally closed pseudo pilot valve type AC electromagnetic direct-acting water supply valve 60 (hereinafter, this AC valve 60) according to another embodiment of the present invention when the valve is closed. is there. In the present AC valve 60, an inflow port 11 through which water flows, an inflow pipe 12, an inflow chamber 13 for transmitting water pressure to the diaphragm valve 30, a main valve seat 15, an outflow pipe 14, and an outflow port through which water flows out. A valve body 17 (conventional product: may be made of synthetic resin or brass) integrally formed with 16 has a small flow rate orifice 62 so as to close the main valve seat 15.
A watertight packing (for example, an O-ring) 6 is attached to a hard cap 61 of a synthetic resin molded member (for example, a polyacetal resin).
3 is inserted into the inner peripheral portion of the outflow pipe 14, and for example, the guide case 40 is pressed so that a soft liquid-tight packing material 64 of an elastic member (for example, silicone rubber) is pressed against the valve body 17. The plunger 4 to which the pilot valve 41 is fixed is pressed so as to close the micro flow orifice 62 of the hard cap 61 on the inner periphery of the guide case 40.
2 and a coil spring 43 which constantly urges the plunger 42, and a copper wire 44 is wound around a cylindrical bobbin 45 on the outer periphery of the guide case 40 to form a terminal piece 46.
Is installed with a solenoid 47 (conventional product) connected to the. The inflow port 11 may be provided with a conventional product such as a curved metal filter 50 for inflow of about 60 mesh for preventing foreign matter from entering, a collar 51, and an annular disk 52 as necessary.
In addition, a fine foreign substance preventing 100
A curved metal filter 53 having a mesh size and a flow rate adjusting component 56 for controlling a flow rate are provided. Further, it may be provided on the inner peripheral portion of the outlet 16 instead of the inner peripheral portion of the outflow pipe 14. A support member 65 or the like may be inserted (press-fitted) into the inner peripheral portion of the outflow port 16 in order to prevent the flow rate adjusting component 56 from jumping out, or may be formed integrally with the valve body 17. You can leave it.

The operation is the same as that of the present AC valve 10 and is therefore omitted.
7, the guide case 40, the pilot valve 41, the plunger 42, the solenoid 47, and the like can be diverted as they are, and the curved metal filter 53 allows a predetermined flow rate of less than 1 liter per minute to supply water at a very small flow rate. It can be expected that spray ports provided in a drying mechanism of a fully automatic washing machine or the like will maintain their functions.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and many combinations, modifications, and the like can be made without departing from the spirit of the invention. Of course it can be done. For example,
In the pseudo-pilot valve type AC electromagnetic direct acting water supply valve of the present invention, the normally closed type is used, but the normally open type may be used.

Further, in the pseudo-pilot valve type AC electromagnetic direct-acting water supply valve of the present invention, a single unit is used.
It can also be applied to an AC electromagnetic water supply valve of a pilot valve type (serial, triple, quadruple, etc.). In other words, by combining a pilot valve type AC electromagnetic water supply valve and a pseudo pilot valve type AC electromagnetic direct water supply valve to form a multiple AC electromagnetic water supply valve, Modification of the valve body which was necessary for the electromagnetic water supply valve,
There is an effect that additional parts such as a fixed iron core and a diode become unnecessary. Then, it is possible to easily replace the multiple control type conventional valve without changing the hardware and / or software of the electric control system of the home electric appliance.

Further, a technique of providing a curved metal filter 53 of about 100 mesh for preventing entry of fine foreign matter and a flow rate adjusting component 56 for flow rate control on the inner peripheral portion of the outflow pipe 14 and / or the outflow port 16 is known. The present invention can be applied as it is to a valve or a direct-acting-type DC electromagnetic water supply valve.

[0037]

According to the present invention, the valve body of the AC solenoid type water supply valve of the pilot valve type can be used as it is, and the AC solenoid type water supply valve of the direct pilot valve type can be easily used. The water supply valve can be modified to provide an effect that the reliability of water supply at a minute flow rate and the function maintenance of spray ports provided in a flow control part and a drying mechanism of a fully automatic drying washing machine can be expected. Further, there is an effect that the valve can be easily replaced with a conventional valve without changing hardware and / or software of an electric control system of the household electric appliance.

[Brief description of the drawings]

FIG. 1 is a front vertical cross-sectional view of a single normally closed type pseudo pilot valve type AC electromagnetic direct acting water supply valve according to an embodiment of the present invention when the valve is closed.

FIG. 2 is a front vertical cross-sectional view of a single normally closed type pseudo pilot valve type AC electromagnetic direct acting water supply valve according to an embodiment of the present invention when the valve is opened.

FIG. 3 is a front longitudinal sectional view of a single-unit normally closed pseudo pilot valve type AC electromagnetic direct acting water supply valve according to another embodiment of the present invention when the valve is closed.

[Explanation of symbols]

10: the present AC valve of one embodiment, 11: inflow port, 12: inflow line, 13: inflow chamber, 14: outflow line, 15: main valve seat,
16 ... Outlet, 17 ... Valve body, 20 ... Inner wall, 21 ... Diaphragm, 22 ... Diaphragm orifice, 25 ... Disc, 26 ... Disc orifice, 27 ... Middle protrusion,
28: Watertight packing, 29: Metal net, 30: Diaphragm valve, 31: Orifice (valve seat) for minute flow rate, 33
... liquid-tight packing part, 34 ... back pressure chamber, 40 ... guide case, 41 ... pilot valve (valve element), 42 ... plunger,
43 ... coil spring, 44 ... copper wire, 45 ... cylindrical bobbin, 46 ... terminal piece, 47 ... solenoid, 50 ... curved metal filter for inflow port, 51 ... color, 52 ... annular disk (flow sheet), 53 ... Curved metal filter for outflow line / outlet, 54. Cup, 55. Annular disk (flow sheet), 56. Outflow line / outlet flow rate adjusting component, 60. ... Hard cap, 62 ... Micro flow orifice, 63 ... Watertight packing, 64 ... Liquid packing material, 65 ... Support material

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[Procedure amendment]

[Submission date] April 26, 2001 (2001.4.2
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction contents]

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and many combinations, modifications, and the like can be made without departing from the spirit of the invention. Of course it can be done. For example,
Usually, for example, an AC ground voltage 3
Low voltage for general use with frequency of 50Hz or 60Hz at 00V or less
Is applied, but the single-phase AC power supply is
Rectified voltage or AC-DC conversion of the single-phase AC power supply
A DC voltage or the like may be applied. For example, the alternating-current electromagnetic direct-acting water supply valve of the pseudo pilot valve type of the present invention is of a normally closed type, but may be of a normally open type.

Claims (5)

[Claims] 1. A valve body integrally formed with an inflow port through which water flows, an inflow pipe, an inflow chamber for transmitting water pressure to a diaphragm valve, a main valve seat, an outflow pipe, and an outflow port through which water flows out. A diaphragm valve composed of a soft diaphragm and a hard disk is installed so as to close the main valve seat, and a guide case is pressed against the valve body so as to press a liquid-tight packing portion of the diaphragm valve to the valve body. In order to close the micro flow orifice of the diaphragm valve on the inner periphery,
A plunger to which the pilot valve is fixed, and a coil spring that constantly urges the plunger are housed, and a pseudo pilot valve type AC electromagnetic type configured by installing a solenoid on the outer periphery of the guide case. An AC electromagnetic water supply valve characterized by a direct acting water supply valve. 2. A valve body integrally formed with an inflow chamber through which water flows, an inflow pipe, an inflow chamber for transmitting water pressure to a diaphragm valve, a main valve seat, an outflow pipe, and an outflow port through which water flows out. A diaphragm valve composed of a soft diaphragm and a hard disk is installed so as to close the main valve seat, and a guide case is pressed against the valve body so as to press a liquid-tight packing portion of the diaphragm valve to the valve body. In order to close the micro flow orifice of the diaphragm valve on the inner periphery,
A plunger to which the pilot valve is fixed, and a coil spring that constantly urges the plunger are housed, and a pseudo pilot valve type AC electromagnetic type configured by installing a solenoid on the outer periphery of the guide case. In a direct acting water supply valve, between the soft diaphragm and the hard disc,
An AC electromagnetic water supply valve characterized by sandwiching a metal net. 3. A valve body integrally formed with an inflow port through which water flows, an inflow pipe, an inflow chamber for transmitting water pressure to a diaphragm valve, a main valve seat, an outflow pipe, and an outflow port through which water flows out. A diaphragm valve composed of a soft diaphragm and a hard disk is installed so as to close the main valve seat, and a guide case is pressed against the valve body so as to press a liquid-tight packing portion of the diaphragm valve to the valve body. In order to close the micro flow orifice of the diaphragm valve on the inner periphery,
A plunger to which the pilot valve is fixed, and a coil spring that constantly urges the plunger are housed, and a pseudo pilot valve type AC electromagnetic type configured by installing a solenoid on the outer periphery of the guide case. In the direct-acting water supply valve, a watertight packing is annularly mounted on the middle projection of the hard disk and inserted into the inner peripheral portion of the outflow pipe, thereby opening and closing the main valve seat of the diaphragm valve. AC electromagnetic water valve. 4. A valve body in which an inflow chamber through which water flows, an inflow pipe, an inflow chamber for transmitting water pressure to the diaphragm valve, a main valve seat, an outflow pipe, and an outflow port through which water flows out are integrally formed. A diaphragm valve composed of a soft diaphragm and a hard disk is installed so as to close the main valve seat, and a guide case is pressed against the valve body so as to press a liquid-tight packing portion of the diaphragm valve to the valve body. In order to close the micro flow orifice of the diaphragm valve on the inner periphery,
A plunger to which the pilot valve is fixed, and a coil spring that constantly urges the plunger are housed, and a pseudo pilot valve type AC electromagnetic type configured by installing a solenoid on the outer periphery of the guide case. An AC electromagnetic water supply valve, wherein a curved metal filter and a flow rate adjusting component are provided on an inner peripheral portion of an outflow pipe or an outlet in a direct acting water supply valve. 5. A valve body in which an inflow chamber through which water flows, an inflow pipe, an inflow chamber for transmitting pressure of water to the diaphragm valve, a main valve seat, an outflow pipe, and an outflow port through which water flows out are integrally formed. A watertight packing is mounted around a hard cap having a micro flow rate orifice so as to close the main valve seat and inserted into the inner peripheral portion of the outflow pipe so that the liquidtight packing material is pressed against the valve body. A plunger to which a pilot valve is fixed and the plunger are constantly resiliently biased so that the orifice for minute flow rate of the hard cap is closed on the inner peripheral portion of the guide case by pressing the guide case. A pseudo-pilot valve type AC electromagnetic direct-acting water supply valve that accommodates a coil spring and has a solenoid installed on the outer periphery of the guide case. Filter and flow control An AC electromagnetic water supply valve characterized by providing a joint part.