JP6126341B2 - Multiple feed water solenoid valve - Google Patents

Description

  The present invention relates to a multiple feed water solenoid valve including a pilot operated solenoid valve and a direct acting solenoid valve.

  For example, while the performance of general consumer equipment such as a fully automatic washing machine and a fully automatic washing and drying machine is improved, multiple water supply with a plurality of outlets with different flow rates of outflow water for one inlet The need for solenoid valves is increasing. Along with this, it is required to reduce the cost of parts of the multiple water supply solenoid valve and to ensure a constant flow rate of water flowing out from the outlet without being affected by the water pressure at the inlet. Is increasing. In particular, in a water supply solenoid valve for a minute flow rate, it is necessary to prevent a decrease in flow rate characteristics due to foreign matters mixed therein.

  In order to meet these requirements, the applicant of the present application is a multiple-type water supply electromagnetic valve including a plurality of electromagnetic valves that open and close an orifice by opening and closing an orifice. One solenoid valve includes a first diaphragm eater of a hard member provided with an orifice, a first diaphragm of a soft member incorporated in the first diaphragm eater, and a first diaphragm kumi having a water hammer pressure reducing component for reducing water hammer pressure, A flow rate adjusting mechanism component that discharges a predetermined first flow rate fluid to an outflow pipe communicating with the first outflow port, a pilot operated solenoid valve, and the second solenoid valve of the solenoid valves has an orifice A second diaphragm of a hard member provided, a second diaphragm of a soft member incorporated in the second diaphragm, and the second diaphragm and the second diaphragm passing through the second diaphragm A second diaphragm kumi having a mesh provided in the hole, and a micro flow rate adjusting mechanism component that discharges a fluid having a predetermined second flow rate smaller than the first flow rate to the outflow pipe communicating with the second outflow port. The second diaphragm eater is proposed to be a direct acting solenoid valve having an abutting portion that abuts against the wall surface of the flow path and fixes the second diaphragm kumi (see Patent Document 1). (See paragraph 0009).

  The multiple water supply solenoid valve described in Patent Document 1 includes a flow rate adjusting mechanism component in a first solenoid valve that is a pilot-actuated solenoid valve, and a minute flow rate in a second solenoid valve that is a direct-acting solenoid valve. Since the adjustment mechanism component is provided, the flow rate of water flowing out from the outlet of each solenoid valve can be made constant regardless of the water pressure at the inlet. In addition, the multiple-type water supply solenoid valve described in Patent Document 1 is provided with a mesh in the second diaphragm iterator of the second solenoid valve, which is a direct acting solenoid valve, and a hole penetrating the second diaphragm. Intrusion of foreign matter can be prevented, and deterioration of the flow rate characteristic due to the inclusion of foreign matter can be prevented. Furthermore, since the multiple-type water supply solenoid valve described in Patent Document 1 abuts the second diaphragm on the synthetic resin portion of the second diaphragm eater, a water seal is provided between the second diaphragm eater and the second diaphragm. There is no need to provide an O-ring or the like, and the cost of the multiple water supply solenoid valve can be reduced by reducing the number of parts.

JP 2012-77785 A

  However, the multiple-type water supply electromagnetic valve described in Patent Document 1 may generate noise from the first diaphragm when the first electromagnetic valve is switched from the water supply state to the water supply stop state. The inventor of the present application obtained the following knowledge as a result of earnestly studying the cause of occurrence of this abnormal noise. In the following, the cause of abnormal noise clarified by the inventor of the present application will be described with reference to FIGS.

In these drawings, reference numeral 10 denotes a base iron plate plate, reference numeral 11 denotes a body attached to the front side of the iron plate plate 10, reference numeral 5 denotes a plunger unit attached to the back side of the iron plate plate 10, and reference numeral 6 denotes a plunger unit 5. A diaphragm kumi 6 driven on and off is shown. The diaphragm kumi 6 includes a hard diaphragm it 61 which is a synthetic resin molded product and a soft diaphragm 62 formed of rubber or the like. When the solenoid 55 provided in the plunger unit 5 is energized, the magnetic plunger 51 moves to the right in the figure, and the plunger sheet 52 attached to the tip of the plunger 51 is formed at the tip of the diaphragm it 61. Separated from the orifice 61b. In this state, tap water in the inflow chamber 12 formed in the body 11 flows into the back pressure chamber 13 and flows out from the outlet through the orifice 61b and the outflow pipe 14, so that the pressure in the inflow chamber 12 is increased. However, the pressure in the back pressure chamber 13 formed between the body 11 and the plunger unit 5 becomes higher, the soft diaphragm 62 is deformed, and the diaphragm kumi 6 moves to the right in the drawing. Thereby, as shown in FIG.13 (b), a clearance gap arises between the lip | rip 15 formed in the body 11, and the diaphragm 62. FIG. Therefore, the tap water that has flowed into the inflow chamber 12 from the tap water inlet (not shown) flows into the outflow pipe 14 through the gap formed between the lip 15 and the diaphragm 62 and flows out from the outflow pipe 14 to the outside. Is done.

  When the energization to the solenoid 55 is interrupted from this state, the magnetic plunger 51 moves to the left in the figure, and the plunger sheet 52 attached to the distal end portion of the plunger 51 is formed at the distal end of the diaphragm iterator 61. It is pressed against the orifice 61b. In this state, since the water in the back pressure chamber 13 has no place to go, the pressure in the back pressure chamber 13 becomes higher than the pressure in the inflow chamber 12, and the diaphragm kumi 6 moves to the left in the figure. As shown in FIG. 13A, the diaphragm 62 is in close contact with the lip 15 formed on the body 11. Therefore, the outflow of water from the outflow pipe 14 is stopped.

  As shown in FIG. 13 (a), the multiple electromagnetic water supply valve described in Patent Document 1 is such that the diaphragm iter 61 and the diaphragm 62 are opposed to each other when the outflow of water from the outflow pipe 14 is stopped. And it is comprised so that it may closely_contact | adhere over the whole side. For this reason, when the diaphragm 62 is deformed as the solenoid 55 is turned on / off, friction is generated between the diaphragm iterator 61 and the diaphragm 62 (particularly, between the side surfaces of both the members 61, 62). An abnormal noise is generated by the frictional force acting during 62.

  The present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is to produce a multiple-type water-supplying electromagnetic wave that does not generate abnormal noise during water supply and water supply stop and has excellent quietness. To provide a valve.

In order to solve such a problem, a multiple-type water supply solenoid valve according to claim 1 of the present application is adapted to a plunger unit that intermittently energizes the solenoid to drive the plunger forward and backward, and to respond to the forward and backward drive of the plunger. A plurality of solenoid valves each having a diaphragm kumi that opens and closes a water supply passage formed in the body. The diaphragm kumi consists of a hard diaphragm it provided with an orifice and a soft diaphragm incorporated in the diaphragm it. The diaphragm kumi that is configured and is provided in at least one of the plurality of solenoid valves is configured such that the diaphragm it stands up in one direction from a plane portion that supports the diaphragm with a surface and a peripheral edge of the plane portion. The corners connecting these flat and peripheral walls are chamfered or rounded. The diaphragm incorporated in the diaphragm eater is formed between a planar water supply blocking portion that is in contact with a plane portion of the diaphragm eater, a fixed portion fixed to the body, and the water supply blocking portion and the fixed portion. The diaphragm it and the diaphragm are in a water supply cut-off state, the corner connecting the flat portion and the peripheral wall of the diaphragm it is, and the water supply cut-off portion of the diaphragm It is incorporated in the state which formed the space | gap part which these both corner | angular parts do not contact between the corner | angular parts which connect an elastic deformation part.

  According to the present invention, since the gap portions that do not contact each other in the water supply shut-off state are provided in at least a part of the peripheral wall portion of the diaphragm it and the elastic deformation portion of the diaphragm facing the diaphragm wall, the diaphragm is turned on and off with the switching of the solenoid. Even if it deform | transforms, the frictional force which acts between these surrounding wall parts and an elastic deformation part falls, and generation | occurrence | production of the noise resulting from a frictional force can be prevented or suppressed.

It is a perspective view of the multiple-type water supply solenoid valve which concerns on embodiment. It is sectional drawing which shows the structure of the inflow port part of the multiple feed water solenoid valve which concerns on embodiment. It is sectional drawing of the pilot actuated solenoid valve integrated in the multiple feed water solenoid valve which concerns on embodiment. It is sectional drawing which shows the structure and operation | movement of a pilot type diaphragm kumi with which the pilot actuated solenoid valve which concerns on embodiment is equipped. It is sectional drawing of the pilot actuated solenoid valve and the direct acting solenoid valve which are incorporated in the multiple feed water solenoid valve according to the embodiment. It is the side view and perspective view of the flow controller with which the pilot actuated solenoid valve which concerns on embodiment is equipped. It is sectional drawing of the flow controller incorporating a flow washer. It is sectional drawing which shows the deformation | transformation state of the flow washer at the time of water pressure application. It is an expanded sectional view of the direct acting solenoid valve incorporated in the multiple feed water solenoid valve concerning an embodiment. It is the perspective view seen from the back side of the diaphragm for direct acting type concerning an embodiment. It is a disassembled perspective view of the diaphragm for a direct acting type concerning an embodiment. It is sectional drawing of the diaphragm type for direct acting type which concerns on embodiment. It is sectional drawing which shows the structure and operation | movement of a pilot-type diaphragm kumi provided in the pilot-operated solenoid valve which the applicant of this application proposed previously.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings, taking as an example a multiple-type water supply electromagnetic valve used in a fully automatic washing and drying machine. Of course, the multiple water supply solenoid valve according to the present invention is not limited to that used in a fully automatic washing and drying machine, and the number of inlets and outlets is also limited to those described in this specification. I don't mean.

≪Multiple feed water solenoid valve 1≫
As shown in FIG. 1, a multiple water supply electromagnetic valve 1 according to an embodiment of the present invention is a four water supply electromagnetic valve including water supply electromagnetic valve units 2A, 2B, 2C, 2D. The multiple water supply electromagnetic valve 1 includes an iron plate plate 10 serving as a base, a body 11 attached to the front side of the iron plate plate 10, and four plunger units 5 attached to the back side of the iron plate plate 10.

  The body 11 is a synthetic resin molded member, and includes an inlet 3 into which tap water flows and an outlet 4A of tap water corresponding to the water supply electromagnetic valve units 2A, 2B, 2C, 2D (see FIGS. 3 and 5). 4B, 4C, 4D, and a flow path communicating from the inflow port 3 to each of the outflow ports 4A, 4B, 4C, 4D are formed.

  The inflow port 3 is connected to a water tap (not shown) through a water supply hose (not shown). As shown in FIG. 2, the inlet 3 is provided with an inlet filter 31 and an inlet flow rate adjusting mechanism component 32. The inflow filter 31 is a curved mesh filter, and ensures a tap water flow path while removing foreign substances in the tap water. Thereby, it is possible to prevent malfunction and flow rate characteristics of the multiple-type water supply electromagnetic valve 1 due to foreign matters entering the multiple-type water supply electromagnetic valve 1. On the other hand, the inlet flow rate adjusting mechanism component 32 is a component for adjusting the flow rate of tap water flowing into the multiple water supply electromagnetic valve 1, and even if the water pressure or flow rate supplied from the tap is different, the inlet port The flow rate is adjusted by the flow rate adjusting mechanism component 32. The tap water whose flow rate is adjusted flows into the inflow chambers 12 (see FIGS. 3 to 5) of the water supply electromagnetic valve units 2A, 2B, 2C, and 2D through an inflow path (not shown).

  Returning to FIG. 1, the outlets 4A, 4B, 4C, and 4D will be described. The outlet 4A is connected to an outer tub (not shown) of a fully automatic washing and drying machine through a connection hose (not shown). By opening the water supply electromagnetic valve unit 2A, a large amount of tap water is supplied from the outlet 4A to the outer tub. Incidentally, the water supply electromagnetic valve unit 2A is used when supplying water into the outer tub during a washing operation or a reservoir rinsing operation of the fully automatic washing / drying machine. Although details will be described later, the water supply electromagnetic valve unit 2A is a pilot operated electromagnetic valve (see FIG. 3).

  Outflow port 4B is connected via an outer tub cover (not shown) and a connection hose (not shown) of the fully automatic washing and drying machine. By opening the water supply electromagnetic valve unit 2B, tap water having a large flow rate is supplied from the outlet 4B into the drum (not shown) of the fully automatic washing dryer from the outlet of the outer tub cover. Incidentally, the water supply electromagnetic valve unit 2B is used when water is supplied so that tap water is directly blown onto the clothes in the drum during the rinsing operation of the fully automatic washing and drying machine. In addition, although mentioned later for details, the water supply solenoid valve unit 2B is also a pilot actuated solenoid valve (refer FIG. 3).

  The outlet 4C is connected to a detergent case (not shown) of a fully automatic washing and drying machine via a connection hose (not shown). By opening the water supply electromagnetic valve unit 2C, a small amount of tap water is supplied from the outlet 4C to the detergent case. Although details will be described later, the water supply electromagnetic valve unit 2C is also a pilot-operated electromagnetic valve provided with a flow rate adjusting mechanism component 7 (see FIG. 5).

  The outlet 4D is connected to a water-cooled dehumidifying mechanism (not shown) of the fully automatic washing and drying machine via a connection hose (not shown). By opening the water supply electromagnetic valve unit 2D, tap water with a minute flow rate is supplied from the outlet 4D to the water-cooled dehumidifying mechanism. Although details will be described later, the water supply solenoid valve unit 2D is a direct acting solenoid valve provided with a direct acting diaphragm kumi 8 and a minute flow rate adjusting mechanism component 9 (see FIGS. 5 and 9).

≪Water supply solenoid valve unit 2A, 2B≫
Next, the water supply electromagnetic valve units 2A and 2B provided in the multiple water supply electromagnetic valve 1 will be described with reference to FIG. Since water supply electromagnetic valve units 2A and 2B have the same configuration, only water supply electromagnetic valve unit 2A will be described, and description of water supply electromagnetic valve unit 2B will be omitted.

  The water supply electromagnetic valve unit 2 </ b> A includes a body 11 in which an inlet 3 and an outlet 4 </ b> A are formed, a plunger unit 5, and a diaphragm kumi (diaphragm valve) 6. In addition, the water supply electromagnetic valve unit 2A is formed with an inflow chamber 12, a back pressure chamber 13, an outflow pipe 14, a lip 15 and a component mounting portion 16.

  The inflow chamber 12 is a chamber formed between the body 11 and the pilot diaphragm kumi 6, and tap water whose flow rate is adjusted by the inlet flow rate adjusting mechanism part 32 (see FIG. 2) flows in.

  The back pressure chamber 13 is a chamber formed between the pilot diaphragm kumi 6 and a pipe 54 described later.

  The outflow pipe 14 has a lip 15 formed on the upstream side, and is connected to the outlet 4A on the downstream side. In addition, the outflow pipe 14 is formed with a component mounting portion 16 to which a flow rate adjusting mechanism component 7 (see FIG. 4) for limiting the flow rate and a minute flow rate adjusting mechanism component 9 (see FIG. 4) can be attached. The water supply electromagnetic valve unit 2A (2B) flows out a large amount of tap water from the outflow port 4A (4B), and nothing is attached to the component mounting portion 16.

≪Plunger unit 5≫
Next, the plunger unit 5 will be described. As shown in FIG. 3, the plunger unit 5 according to the embodiment includes a plunger 51, a plunger seat (pilot valve) 52, a coil spring 53, a pipe 54, a solenoid 55 that sucks the plunger 51, and a solenoid 55 that is an iron plate. And a yoke 56 fixed to the plate 10.

  The plunger 51 is a magnetic member, and is preferably manufactured using a stainless material that is easy to cut and has excellent corrosion resistance. The plunger sheet 52 is a soft member provided at one end of the plunger 51, and seals the orifice 61b with water by contacting the orifice 61b of the pilot diaphragm kumi 6. The coil spring 53 urges the plunger 51 in a direction that protrudes toward the orifice 61b. As a material of the coil spring 53, for example, a stainless steel wire having excellent corrosion resistance is used.

  The pipe 54 is a synthetic resin molded member including a bottomed cylindrical portion 54a, a flange portion 54b, and a water seal portion 54c. A plunger 51 and a coil spring 53 are incorporated in the bottomed cylindrical portion 54a. A solenoid 55 is provided on the outer periphery of the cylindrical portion 54a. The water sealing portion 54c presses the outer peripheral portion of the diaphragm 62, which is a soft member, to the lip 15 formed on the body 11 and seals the water.

  By applying power to the solenoid 55, a magnetic action is generated and the plunger 51 is attracted in a direction away from the orifice 61b. Thereby, the plunger sheet | seat 52 leaves | separates from the orifice 61b of the pilot type diaphragm kumi 6, and the water seal of the orifice 61b is cancelled | released. On the other hand, by shutting off the power supply to the solenoid 55, the attraction of the plunger 51 due to the magnetic action is released, and the plunger 51 is biased by the biasing force of the coil spring 53 provided between the back side of the plunger 51 and the bottom of the cylinder portion 54a. The sheet 52 comes into contact with the orifice 61b, and the orifice 61b is sealed with water.

≪Pilot type diaphragm kumi 6≫
Next, the pilot type diaphragm kumi 6 will be described. As shown in FIGS. 3 and 4, the pilot diaphragm kumi 6 is composed of a hard diaphragm eater 61 made of a synthetic resin molded product and a soft diaphragm 62 made of a material having rubber-like elasticity such as rubber or latex. Has been.

  As shown in FIGS. 4 (a) and 4 (b), the diaphragm iterator 61 includes a flat surface portion 61e that supports the diaphragm 62 by a surface, and a peripheral wall portion that stands up from the peripheral edge of the flat surface portion 61e toward the back pressure chamber 13 side. 61f. And rounding (R) 61g is given to the corner | angular part which connects these plane parts 61e and the surrounding wall part 61f. In addition, instead of rounding (R) 61g, a tapered chamfer can be applied to a corner portion connecting the flat portion 61e and the peripheral wall portion 61f. In addition, instead of a configuration in which rounding (R) 61g or tapered chamfering is performed on the corner portion connecting the flat surface portion 61e and the peripheral wall portion 61f, the outer surface of the peripheral wall portion 61f may be formed on a rough surface such as a satin surface. it can.

  At the center of the flat portion 61e, an orifice 61b is formed protruding toward the back pressure chamber 13 side, and a cylindrical portion 61c is formed protruding toward the outflow tube 14 side, and the back pressure chamber 13 and the outflow tube are formed. 14 can pass through the orifice 61b and the cylindrical portion 61c. Further, a side orifice 61a is formed on the outer peripheral portion of the flat portion 61e, and the inflow chamber 12 and the back pressure chamber 13 can pass water through the side orifice 61a. The outer diameter of the cylindrical portion 61c is smaller than the inner diameter of the outflow pipe 14, and a plurality of rectifying blades 61d are formed on the outer periphery of the cylindrical portion 61c, and the cylindrical portion 61c and the rectifying blade 61d are fitted into the outflow pipe 14. Has been.

  On the other hand, as shown in FIGS. 4A and 4B, the diaphragm 62 includes a planar water supply blocking portion 62 a that is in contact with the plane portion 61 e of the diaphragm iterator 61 and a fixed portion 62 b that is fixed to the body 11. In addition, an elastically deformable portion 62c having a U-shaped cross section is formed between the water supply blocking portion 62a and the fixed portion 62b. As shown in FIG. 4A, the diaphragm 62 has the water supply blocking portion 62a in contact with the flat surface portion 61e of the diaphragm iterator 61 and the elastic deformation portion 62c facing the outer surface of the peripheral wall portion 61f of the diaphragm iterator 61. In the state where it is arranged, it is incorporated in the diaphragm iterator 61. At this time, a gap 64 corresponding to rounding (R) 61g formed in the diaphragm 61 is formed between the peripheral wall 61f of the diaphragm it 61 and the elastic deformation part 62c of the diaphragm 62. In the case where a rough surface such as a tapered chamfer or a satin finish is formed instead of the configuration in which the diaphragm it 61 is rounded (R) 61g, similarly, between the peripheral wall portion 61f and the elastic deformation portion 62c. A gap portion 64 corresponding to a chamfered or rough concave portion formed in the diaphragm eater 61 is formed.

  As described above, when the power is applied to the solenoid 55, the plunger 51 is sucked in the direction away from the orifice 61b, so the plunger sheet 52 is separated from the orifice 61b of the pilot diaphragm kumi 6 and the water seal of the orifice 61b is removed. Canceled. When the water seal of the orifice 61b is released, the tap water in the inflow chamber 12 flows into the back pressure chamber 13 from the side orifice 61a, and flows out from the outflow port 4A through the orifice 61b, the cylindrical portion 61c and the outflow pipe 14. To do. When this flow path is opened, the pilot diaphragm kumi 6 is separated from the lip 15 by the pressure of the tap water in the inflow chamber 12, and a gap is formed between the two, as shown in FIG. 4 (b). Tap water passes from the inflow chamber 12 through the gap formed between the pilot diaphragm kumi 6 and the lip 15, between the inner wall of the outflow pipe 14 and the outer wall of the cylindrical portion 61c, and from the outlet 4A of the outflow pipe 14. leak. At this time, in the diaphragm 62, as shown in FIG. 4B, the outer peripheral portion of the water supply blocking portion 62a and the elastic deformation portion 62c are elastically deformed, and the elastic deformation portion 62c faces the peripheral wall portion 61f of the diaphragm iter 61. Separate from position.

  When application of power to the solenoid 55 is interrupted from this state, the attraction of the plunger 51 due to the magnetic action is released, and the plunger sheet 52 abuts against the orifice 61b by the biasing force of the coil spring 53 provided in the plunger unit 5, The orifice 61b is sealed with water. Then, when the orifice 61b is sealed, the tap water flowing into the back pressure chamber 13 from the side orifice 61a is accumulated in the back pressure chamber 13 without a place to go, so that the water pressure in the back pressure chamber 13 increases. The pilot type diaphragm kumi 6 moves to the lip 15 side. As a result, the diaphragm 62 of the pilot type diaphragm kumi 6 is pressed against the lip 15, the space between the diaphragm 62 and the lip 15 is sealed, and the outlet 4 </ b> A is stopped. At this time, the elastic deformation part 62c of the diaphragm 62 returns to a position facing the peripheral wall part 61f of the diaphragm iterator 61, as shown in FIG.

  As described above, in the present embodiment, since the gap 64 is formed between the peripheral wall 61f of the diaphragm iterator 61 and the elastic deformation 62c of the diaphragm 62, the elastic deformation 62c is relative to the peripheral wall 61f. Even when it is deformed automatically, it is possible to make it difficult for a frictional force to act between the peripheral wall portion 61f and the elastic deformation portion 62c. Therefore, generation | occurrence | production of the noise accompanying ON / OFF of the water supply electromagnetic valve unit 2A can be eliminated.

  The side orifice 61a is provided with a water hammer pressure reducing component 63, which is a synthetic resin molding member, and restricts the flow rate of tap water flowing from the inflow chamber 12 into the back pressure chamber 13. Thereby, a rapid valve closing operation is prevented, and the occurrence of water hammer (water hammer action, water tank) can be reduced.

≪Water supply solenoid valve unit 2C≫
Next, a water supply electromagnetic valve unit 2C provided in the multiple water supply electromagnetic valve 1 will be described with reference to FIG.

  Unlike the water supply electromagnetic valve units 2A and 2B (see FIG. 3), the water supply electromagnetic valve unit 2C has the flow rate adjusting mechanism component 7 attached to the component attachment portion 16 of the outflow pipe 14 directed to the outlet 4C. The other configuration is the same as that of the water supply electromagnetic valve units 2A and 2B, and thus the description thereof is omitted to avoid duplication.

≪Flow adjustment mechanism parts 7≫
As shown in FIG. 5, the flow rate adjusting mechanism component 7 includes a flow controller 71 that is a synthetic resin molded member and a flow washer 72 that is a soft member. The flow rate range of tap water flowing out from the outlet 4C is defined to be relatively narrow and constant compared to the outlets 4A and 4B. For this reason, in addition to the inlet flow rate adjustment mechanism component 32 (see FIG. 2) provided at the inlet 3, the flow rate adjustment mechanism component 7 is attached to the component attachment portion 16 of the outflow pipe 14 toward the outlet 4C. Regardless of the water pressure of the stopper, tap water with a stable small flow rate flows out from the outlet 4C.

  FIG. 6A is a side view of the flow controller 71, and FIG. 6B is a perspective view of the flow controller 71. As is clear from these drawings, the flow controller 71 is formed with a central shaft body 73 to be inserted into the hole of the flow washer 72 and a plurality of convex portions 74 on the outer peripheral side. The central shaft body 73 is formed with a locking portion 75 for locking the flow washer 72 when the flow washer 72 is assembled. Here, the locking portion 75 is formed at a position higher than the convex body 74 when viewed from the downstream side in the liquid flow direction. Further, the flow controller 71 is formed with a notch 76 and a flow path 77 (see FIG. 7) communicating from the upstream side to the downstream side, and the flow rate adjusted by the flow rate adjusting mechanism component 7 is defined.

  As shown in FIG. 7, a flow washer 72 is incorporated in the flow controller 71. As described above, in the flow controller 71, the locking portion 75 is formed at a slightly higher position than the convex body 74, so that the flow washer 72 is in a state where the flow washer 72 is incorporated in the flow controller 71. A clearance 78 is formed between the downstream flat surface of the projection and the upper end surface of the convex body 74. The flow washer 72 is inserted into the central shaft body 73 until the flow washer 72 comes into contact with the locking portion 75. In this way, by pushing the center side of the flow washer 72 to a predetermined position (a position where the flow washer 72 comes into contact), the position on the outer peripheral side of the flow washer 72 is naturally determined. It is possible to stabilize and to unify the mounting state of the flow washer 72 in the flow rate adjusting mechanism component 7.

  When water pressure is applied to the outflow pipe 14 toward the outlet 4C, as shown in FIG. 8, the outer peripheral portion of the flow washer 72 is raised by the water pressure while the center side of the flow washer 72 is fixed to the locking portion 75. It deform | transforms so that 74 may be contact | abutted. However, as described above, the flow rate adjusting mechanism component 7 according to the present embodiment forms the locking portion 75 at a position higher than the convex body 74, and the center side of the flow washer 72 to the locking portion 75. Since it is fixed, the amount of deformation of the flow washer 72 due to the water pressure with water pressure applied can be minimized. For this reason, the flow characteristics of the flow rate adjusting mechanism component 7 can be stabilized while improving the incorporation of the flow washer 72.

≪Water supply solenoid valve unit 2D and outlet 4D≫
Next, the water supply electromagnetic valve unit 2D provided in the multiple water supply electromagnetic valve 1 according to the present embodiment will be described with reference to FIGS. The water supply solenoid valve unit 2 </ b> D is a direct acting solenoid valve provided with a minute flow rate adjusting mechanism component 9.

  As shown in FIG. 9, in the water supply electromagnetic valve unit 2D, the minute flow rate adjusting mechanism component 9 is attached to the component attachment portion 16 of the outflow pipe 14 directed to the outlet 4D. Other configurations are the same as those of the water supply electromagnetic valve units 2A, 2B, and 2C, and thus the description thereof is omitted to avoid duplication.

  The water supply solenoid valve unit 2D becomes a direct acting solenoid valve by using the direct acting diaphragm kumi 8. Supplying a small amount of tap water from the outlet 4D by using a direct acting solenoid valve having a smaller flow rate compared to the pilot operated solenoid valve and regulating the flow rate using the minute flow rate adjusting mechanism component 9 Can do.

  In the water supply solenoid valve unit 2D, which is a direct acting solenoid valve, when power is applied to the solenoid 55 and the water seal of the orifice 81b is released, the tap water in the inflow chamber 12 is opened in the direct acting diaphragm 82. Flows into the back pressure chamber 13 through the hole 82a, the mesh 83, and the hole 81a of the direct acting diaphragm eater 81. Further, the tap water flowing into the back pressure chamber 13 flows out from the outlet 4D through the orifice 81b, the outflow pipe 14, and the minute flow rate adjusting mechanism component 9 provided in the direct acting diaphragm eater 81. When the power supply to the solenoid 55 is shut off from this state, the water supply solenoid valve unit 2D has the orifice 81b sealed with water and the outlet 4D stopped.

≪Diaphragm Kumi 8 for direct acting type≫
As shown in FIG. 9, the direct-acting diaphragm kumi 8 includes a hard direct-acting diaphragm diaphragm 81 made of a synthetic resin molded product, a soft direct-acting diaphragm 82 made of rubber or latex, and the like. The mesh 83 is made of stainless steel and has excellent corrosion resistance.

  As shown in FIGS. 10 to 12, the direct acting diaphragm iter 81 is formed with a hole 81a, an orifice 81b, and a boss 81c. The hole 81a is opened at a position corresponding to the hole 82a (see FIG. 9) formed in the direct acting diaphragm 82, and from the inflow chamber 12 (see FIG. 9) to the back pressure chamber 13 (see FIG. 9). Water can be passed. The orifice 81b allows water to flow from the back pressure chamber 13 (see FIG. 9) to the outflow pipe 14 (see FIG. 9). The boss 81c is in contact with the flange portion 54b (see FIG. 9) to fix the direct acting diaphragm kumi 8. A mesh 83 is provided between the hole 82a and the hole 81a in order to prevent the minute flow rate adjusting mechanism component 9 (see FIG. 9) from being easily clogged with foreign substances in tap water.

  The mesh 83 is insert-molded in the direct acting diaphragm eater 81. Therefore, as shown in FIG. 11 and FIG. 12, a portion 81d where the direct acting diaphragm 82 on one side of the direct acting diaphragm eater 81 abuts is a synthetic resin molded portion, and a mesh 83 is formed in the portion. Not exposed. Accordingly, the direct acting diaphragm 82 can be sealed with water by bringing the direct acting diaphragm 82 into contact with the synthetic resin molded portion of the direct acting diaphragm eater 81 without bringing the direct acting diaphragm 82 into contact with the mesh 83. Water sealing with the direct acting diaphragm kumi 8 can be performed reliably.

  Here, the water seal between the inflow chamber 12 and the outflow pipe 14 shown in FIG. 9 will be described. First, the lip 15 is pressed against the direct-acting diaphragm 82, which is a soft member, to prevent water leakage. Further, water leakage is prevented by bringing the soft linear motion diaphragm 82 into contact with a portion 81d which is a synthetic resin molding portion of the direct motion diaphragm ita 81. The pressing pressure required to press the direct acting diaphragm 82 against the lip 15 and seal it with water, and the pressing pressure required to contact the direct acting diaphragm 82 and the portion 81d and seal with water are: It is obtained by abutting a boss 81 c formed on the direct acting diaphragm iter 81 against the flange portion 54 b of the pipe 54.

  In order to stabilize the pressure required for water sealing and to ensure a uniform flow path between the adjacent bosses 81c, the bosses 81c are formed as a plurality of five or more as shown in FIG. It is desirable that the bosses 81c be formed in a cylindrical shape while being equally spaced on the circumference centered on the orifice 81b. The pressing pressure required for water sealing can be adjusted by changing the height of the boss 81c.

≪Small flow rate adjusting mechanism part 9≫
Next, the minute flow rate adjusting mechanism component 9 provided in the water supply electromagnetic valve unit 2D will be described. As shown in FIG. 9, the minute flow rate adjusting mechanism component 9 of this example includes a flow controller 91 and a flow washer 92, and has the same configuration as the flow rate adjusting mechanism component 7. However, the height of the convex body and the locking portion is set low so that the adjusted flow rate is a minute flow rate, and the shape of the notch is different. The minute flow rate adjusting mechanism component 9 may be provided with a locking portion higher than the convex portion on the central shaft body similarly to the flow rate adjusting mechanism component 7, but the flow rate and water pressure are limited by the direct acting diaphragm kumi 8. Therefore, the locking portion may not be provided.

  As described above, the multiple-type water supply electromagnetic valve 1 according to the present embodiment includes a flow rate adjusting mechanism (flow rate adjusting mechanism component 7 and minute flow rate adjusting mechanism component 9), diaphragm kumi (pilot type diaphragm kumi 6 and direct acting type diaphragm). By rearranging the kumi 8), the flow rate of water flowing out from the outlets 4A, 4B, 4C, 4D can be adjusted.

1 ... Multiple feed water solenoid valve 2C ... Water feed solenoid valve unit (first solenoid valve)
2D ... Water supply solenoid valve unit (second solenoid valve)
3 ... Inlet 31 ... Inlet filter 32 ... Inlet flow rate adjustment mechanism parts 4A, 4B ... Outlet 4C ... Outlet (first outlet)
4D ... Outlet (second outlet)
5 ... Plunger unit 51 ... Plunger 52 ... Plunger seat 53 ... Coil spring 54 ... Pipe 54a ... Tube portion 54b ... Flange portion 54c ... Water seal portion 55 ... Solenoid 56 ... Yoke 6 ... Diaphragm kumi (first diaphragm kumi)
61 ... Diaphragm Ita (First Diaphragm Ita)
61a ... Side orifice 61b ... Orifice (first orifice)
61c ... Cylindrical part 61d ... Rectifying vane 61e ... Corner part of diaphragm italy 61e ... Plane part 61f ... Surrounding wall part 61g ... Rounding (R)
62 ... Diaphragm (first diaphragm)
62a ... Water supply blocking part 62b ... Fixing part 62c ... Elastic deformation part 63 ... Water hammer pressure reducing part 64 ... Gap part 7 ... Flow rate adjusting mechanism part 71 ... Flow controller 72 ... Flow washer 73 ... Central shaft body 74 ... Convex part 75 ... Locking part 76 ... Notch 77 ... Flow path 78 ... Clearance 8 ... Direct acting diaphragm kumi (second diaphragm kumi)
81 ... Direct acting diaphragm diaphragm (second diaphragm diaphragm)
81a ... hole 81b ... orifice (second orifice)
81c ... boss (butting part)
81d ... part (synthetic resin part)
82 ... Direct acting diaphragm (second diaphragm)
82a ... hole 83 ... mesh 9 ... micro flow rate adjusting mechanism parts 10 ... iron plate 11 ... body 12 ... inflow chamber 13 ... back pressure chamber 14 ... outlet pipe 15 ... lip 16 ... component mounting portion

Claims (1)

A plurality of solenoid valves having a plunger unit that intermittently energizes the solenoid to drive the plunger forward and backward, and a diaphragm kumi that opens and closes a water supply path formed in the body according to the forward and backward drive of the plunger;
The diaphragm kumi is composed of a hard diaphragm it provided with an orifice, and a soft diaphragm incorporated in the diaphragm it,
The diaphragm kumi provided in at least one of the plurality of solenoid valves includes a planar portion where the diaphragm it supports the diaphragm with a surface, and a peripheral wall portion erected in one direction from a peripheral edge of the planar portion. And chamfering or rounding is applied to the corners connecting the flat part and the peripheral wall part.
The diaphragm incorporated in the diaphragm eater is formed between a planar water supply blocking portion that is in contact with a plane portion of the diaphragm eater, a fixed portion fixed to the body, and the water supply blocking portion and the fixed portion. And has an elastically deformed portion,
The diaphragm eater and the diaphragm are in a water supply cutoff state, between a corner portion connecting the flat portion and the peripheral wall portion of the diaphragm eater, and a corner portion connecting the water supply cutoff portion and the elastic deformation portion of the diaphragm, A multiple-type water supply solenoid valve, which is incorporated in a state where a gap portion is formed in which these both corner portions do not contact.