JP6421098B2 - Electromagnetic pump and pulsating water discharge device using the same - Google Patents

Description

  The present invention relates to an electromagnetic pump used for supplying various liquids such as a fuel supply to a combustion apparatus used for heating, hot water supply, cooking, etc., and a cleaning liquid supply to a cleaning apparatus.

  Conventionally, in this type of electromagnetic pump, a free piston-shaped plunger is moved forward by electromagnetic force in a cylinder and is moved backward by a spring pressure, and the plunger is pressurized by the plunger during the forward movement. The fluid fuel is discharged from the discharge port while the discharge check valve is pushed open by the pressure of the fluid fuel. Such an electromagnetic pump will be described with reference to the drawings.

  FIG. 6 shows a conventional electromagnetic pump. This electromagnetic pump is for supplying fluid fuel to a combustion device, for example. In FIG. 6, in the electromagnetic pump 101, a free piston-like plunger 103 is disposed in a cylinder 102 at a predetermined position by a spring 104. A spherical check valve 106 is disposed in the plunger 103 so that the valve seat 108 can be opened and closed in a state where the check valve 106 is lightly biased by a spring 107. The lower side of the drawing is a suction port, and the valve seat 112 is also disposed on the upper side of the upper discharge joint 109 so that the check valve 110 is lightly urged by a spring 111 and can be opened and closed. A coil bobbin 113 is disposed on the outer peripheral portion of the cylinder 102 of the electromagnetic pump 101, and an electromagnetic coil 114 is disposed around the coil bobbin 113. Magnetic pole members 115 and 116 are disposed inside the coil bobbin 113, and magnetic fittings 117 as magnetic path members that form magnetic paths with the magnetic pole members 115 and 116 are disposed outside the coil bobbin 113 and the electromagnetic coil 114. ing.

  In the above configuration, when the electromagnetic coil 114 of the electromagnetic pump 101 is energized, a magnetic circuit using the electromagnetic force generated by the electromagnetic coil 114 is formed by the magnetic pole members 115 and 116 and the magnetic metal fitting 117, and the electromagnetic force is applied to the plunger 103 strongly. The plunger 103 is moved toward the discharge joint 109 against the urging force of the spring 104. During this forward movement, the check valve 106 in the plunger 103 remains closed with the pressure of the pressurized fluid fuel, but the fluid fuel while pushing the check valve 110 on the discharge joint 109 side with the pressure of the fluid fuel. Is discharged from the discharge joint 109.

  Next, the drive pulse is not energized to the electromagnetic coil 114. At this time, electromagnetic force does not work, so the plunger 103 moves backward by the urging force of the spring 104 and moves to the side opposite to the discharge joint 109 side. To do. At the time of this backward movement, the check valve 106 in the plunger 103 opens when the fluid fuel in the plunger 103 is depressurized, and the liquid fuel flows into the inside through the valve seat portion 108, and the reverse valve on the discharge joint 109 side is opened. The stop valve 110 is closed. By repeating the above operation, liquid fuel discharge control is performed (see, for example, Patent Document 1).

  FIG. 7 shows a conventional pulsating water discharge apparatus using an electromagnetic pump with an accumulator. The pulsating water discharge device is used for cleaning liquid supply of a cleaning device, for example. In FIG. 7, a pulsating water discharge device 121 includes an accumulator 122 formed integrally with an internal electromagnetic pump, a water inlet 124 into which water supplied from a flow rate adjusting means (not shown) flows, and pulsating water. And a water outlet 125 for discharging.

  The pulsating water discharge device 121 includes a movable portion 126 that is a plunger that reciprocates in a cylinder of an electromagnetic pump by controlling energization of the electromagnetic coil. The movable portion 126 pulsates in a direction parallel to the illustrated axis 128, that is, in a direction parallel to the water flow. Thereby, the pulsating water discharge apparatus 121 can give a pulsation to the water which flows through the inside, and can give a pulsation to the water discharged from the water outlet 125 (for example, refer patent document 2).

Japanese Patent Laid-Open No. 10-037854 JP 2011-58206 A

  However, the former conventional electromagnetic pump 101 is provided with a magnetic fitting 117 as a magnetic path member outside the coil bobbin 113 provided with the electromagnetic coil 114, and the magnetic fitting 117 is configured to sandwich the coil bobbin 113 from the axial direction. Has been. The magnetic bracket 117 forms a magnetic circuit by the electromagnetic force generated by the electromagnetic coil 114 with the magnetic pole members 115 and 116. The magnetic metal fitting 117 is configured to be larger than the outer diameter shape of the suction joint or the discharge joint.

  Moreover, since the magnetic metal member 117 is formed by bending a rectangular plate member into a U shape so as to sandwich the coil bobbin 113, the magnetic metal member 117 is configured to be excessively larger than the cylindrical electromagnetic coil 114 wound around the coil bobbin 113. As a result, the outer diameter of the suction joint or the discharge joint becomes significantly larger, and there is a problem that a large space is required to attach the electromagnetic pump 101 to the apparatus. Moreover, when the diameter of the electromagnetic pump 101 is reduced, the capability of the electromagnetic coil is reduced.

  Further, in the latter pulsating water discharge device 121, not only the electromagnetic coil is large, but the accumulator 122 formed integrally with the discharge device is formed with a large shape with respect to the water inlet 124. The shape of the accumulator 122 greatly increases the size of the discharge device, and there is a problem that a large space is required to attach the discharge device to the cleaning device.

  The present invention solves the above-mentioned conventional problems, and the outer diameter of the electromagnetic pump does not become much larger than the outer diameter of the suction joint and the discharge joint, and the cylindrical shape has improved the ability of the electromagnetic coil. It aims at providing a compact electromagnetic pump and a pulsating water discharge device using the same.

In order to achieve the above object, an electromagnetic pump of the present invention is provided between a suction joint that forms a liquid suction flow path, a cylindrical discharge joint that forms a liquid discharge flow path, and the suction joint and the discharge joint. A cylindrical cylinder that forms a liquid flow path, a plunger that reciprocates in the axial direction in the cylinder, and an electromagnetic coil that reciprocates the plunger with a magnetic force generated by energization on the outer periphery of the cylinder, A magnetic fitting that forms a magnetic circuit by a magnetic force when the electromagnetic coil is energized at an outer periphery of the electromagnetic coil, and the magnetic fitting is formed along an outer periphery of the electromagnetic coil, and includes the suction joint and the wherein the side wall of the substantially semi-cylindrical shape that circumscribes the outer circumference of the discharge joint, the intake joint and the discharge joint to sandwich the axial direction on both sides together with the electromagnetic coil side And a pressing wall formed by bending the axial end portion of the contact portion between the side walls and the pressing wall is substantially semi-circular arc shape along the axial direction end portion shape of the side wall.

  The outer diameter of the electromagnetic coil is a circular shape that circumscribes the outer periphery of the suction joint or the discharge joint, and the length in the axial direction of the electromagnetic coil is approximately 1.5 times or more of the outer diameter. It is desirable.

It is desirable to connect an accumulator formed of an elastic tube having a predetermined length to the suction joint.
Moreover, this invention is a pulsating water discharge apparatus using the said electromagnetic pump.

According to the electromagnetic pump of the present invention, the magnetic metal fitting has an approximately semi- cylindrical side wall along the outer periphery of the electromagnetic coil and circumscribing the outer periphery of the suction joint and the discharge joint, and the suction joint and the discharge joint together with the electromagnetic coil in the axial direction. since a pressing wall sandwiching from both sides, can be made compact not to significantly increase an electromagnetic pump outer diameter from the suction fitting and the discharge joint, Ru can be easily assembled. Moreover, in order to obtain the same electromagnetic force by reducing the outer diameter of the electromagnetic coil, it is possible to easily increase the axial length of the electromagnetic coil with respect to the outer diameter. By reducing the winding length by reducing the winding length, the resistance value of the winding decreases and the volume ratio of the exposed surface area of the winding increases, reducing the temperature rise during energization of the electromagnetic coil. Can be increased.
In addition, according to the pulsating water discharge device of the present invention, the electromagnetic pump has a compact and substantially cylindrical shape, so that it is easy to integrate the pump into the discharge part component of the device to which the electromagnetic pump is mounted. In addition, it is easy to make the liquid feeding path including the electromagnetic pump compact.

FIG. 2 is a cross-sectional view of a main part of the electromagnetic pump according to Embodiment 1 of the present invention. The component perspective view of the electromagnetic pump. Sectional drawing of the principal part of the electromagnetic pump in Embodiment 2 of this invention. Sectional drawing of the principal part of the pulsating water discharge apparatus in Embodiment 3 of this invention. The component perspective view of the pulsating water discharging apparatus. Sectional drawing of the conventional electromagnetic pump. Sectional drawing of the conventional pulsating water discharge apparatus using the electromagnetic pump with an accumulator.

  An electromagnetic pump according to the present invention includes a cylindrical suction joint that forms a liquid suction flow path, a cylindrical discharge joint that forms a liquid discharge flow path, and a liquid flow path between the suction joint and the discharge joint. A cylindrical cylinder that forms a cylinder, a plunger that reciprocates in the axial direction in the cylinder, an electromagnetic coil that reciprocates the plunger by a magnetic force generated by energization on the outer periphery of the cylinder, and an outer periphery of the electromagnetic coil. A magnetic metal fitting that forms a magnetic circuit using a magnetic force when the electromagnetic coil is energized, and the magnetic metal fitting is configured by a substantially cylindrical pipe that covers the outer periphery of the electromagnetic coil and circumscribes the outer periphery of the suction joint and the discharge joint. ing.

  (Compactness) In the above configuration, a strong magnetic circuit is formed on the magnetic bracket by the electromagnetic force generated by the electromagnetic coil, and the plunger is reciprocated by securing a sufficient stroke by the electromagnetic force generated by the electromagnetic coil. In addition, the electromagnetic pump can have a substantially cylindrical shape and a compact shape that does not significantly increase from the outer diameter of the suction joint and the discharge joint. For this reason, for example, it becomes easy to integrate an electromagnetic pump into the discharge part component of the apparatus equipped with the electromagnetic pump, and the liquid feeding path including the electromagnetic pump can be made compact.

  (Magnetic force UP) Also, in order to obtain the same electromagnetic force by reducing the outer diameter of the electromagnetic coil, the axial length of the electromagnetic coil is increased with respect to the outer diameter. The smaller the winding length, the lower the winding resistance value and the larger the volume ratio of the exposed surface area of the winding, so that the temperature rise during energization of the electromagnetic coil can be reduced. Can be increased.

  For this reason, the number of turns of the electromagnetic coil can be reduced, and the outer diameter of the electromagnetic coil can be made smaller synergistically, so that a more compact configuration can be achieved.

  (Scratch prevention) Further, the magnetic coil is protected by the magnetic metal fitting to prevent the damage, and a protective member such as a protective tape is not required around the electromagnetic coil, so that it can be configured safely and inexpensively.

  Sealing means such as an O-ring may be disposed between the magnetic fitting and the suction joint and between the magnetic fitting and the discharge joint.

  (Sealing structure, safety improvement) According to this configuration, the electromagnetic coil is covered with the magnetic metal fitting and is blocked from the outside air by the sealing means, so that the possibility of the electromagnetic coil coming into contact with moisture of the outside air is reduced. There is no need to worry about leakage or short circuit, greatly improving safety.

  An electromagnetic pump according to the present invention includes a cylindrical suction joint that forms a liquid suction flow path, a cylindrical discharge joint that forms a liquid discharge flow path, and a liquid flow path between the suction joint and the discharge joint. A cylindrical cylinder that forms a cylinder, a plunger that reciprocates in the axial direction in the cylinder, an electromagnetic coil that reciprocates the plunger by a magnetic force generated by energization on the outer periphery of the cylinder, and an outer periphery of the electromagnetic coil. And a magnetic metal fitting that forms a magnetic circuit using a magnetic force when the electromagnetic coil is energized, and the magnetic metal fitting is formed along the outer periphery of the electromagnetic coil and has a substantially semi-cylindrical side wall circumscribing the outer periphery of the suction joint and the discharge joint And a pressing wall formed by bending the axial end of the side wall so as to sandwich the electromagnetic coil from both sides in the axial direction, and the contact portion between the side wall and the pressing wall is in the axial direction of the side wall. There a substantially semi-circular shape along the section shape.

  In the above configuration, a strong magnetic circuit by the electromagnetic force generated by the electromagnetic coil can be formed on the magnetic metal fitting, thereby reciprocating the plunger with a sufficient stroke secured by the electromagnetic force generated by the electromagnetic coil. Can be made. Moreover, the electromagnetic pump can be made into a substantially cylindrical and compact shape that does not significantly increase from the outer diameter of the suction joint and the discharge joint. Can be integrated easily, and the liquid feeding path including the electromagnetic pump can be made compact.

  In addition, in order to obtain the same electromagnetic force by reducing the outer diameter of the electromagnetic coil, the axial length of the electromagnetic coil is configured to be longer than the outer diameter, so the winding diameter of the electromagnetic coil is reduced. Shortening the winding length reduces the winding resistance and increases the volume ratio of the exposed surface area of the winding, reducing the temperature rise during energization of the electromagnetic coil, and increasing the capacity of the electromagnetic coil. Can do.

  For this reason, the number of windings of the electromagnetic coil can be reduced, the outer diameter of the electromagnetic coil can be reduced synergistically, and a more compact configuration can be achieved.

  (Strength UP) The strength with which the holding wall of the magnetic bracket sandwiches the electromagnetic coil is structurally high, and when the electromagnetic coil and the suction joint or the discharge joint or both are sandwiched at the same time, the electromagnetic force generated by the electromagnetic coil is reduced to the magnetic bracket. As long as the magnetic circuit formed by the plunger is not damaged, the thickness of the magnetic metal fitting can be reduced and the structure can be reduced.

  A configuration in which the outer diameter of the electromagnetic coil is a circle having a size that circumscribes the outer periphery of the suction joint or the discharge joint, and the length in the axial direction of the electromagnetic coil is approximately 1.5 times or more of the outer diameter. And it is sufficient.

  In this configuration, in order to obtain the same electromagnetic force by reducing the outer diameter of the electromagnetic coil, the axial length of the electromagnetic coil is made longer than the outer diameter, so the necessary magnetic force is ensured by the electromagnetic coil. By reducing the winding length of the electromagnetic coil for the purpose, the volume ratio of the exposed surface area of the electromagnetic coil is increased, the temperature rise during energization of the electromagnetic coil can be reduced, and the capability of the electromagnetic coil can be enhanced. For this reason, the outer diameter of an electromagnetic coil can be made smaller synergistically and it can comprise more compactly.

  What is necessary is just to set it as the structure which connected the accumulator formed with the elastic body tube of predetermined length to the said suction joint.

  In this configuration, by adjusting not only the thickness and strength of the tube, but also its length, the accumulator capacity can be adjusted very easily and accurately, and an accumulator function can be obtained with a shape equal to the outer diameter of the suction joint. it can. For this reason, the electromagnetic pump including the accumulator can be formed into a substantially cylindrical and compact shape that does not greatly increase from the outer diameter of the suction joint and the discharge joint. The liquid path can be made compact.

  The present invention is a pulsating water discharge device using the above-described electromagnetic pump. As a result, the electromagnetic pump can be made into a cylindrical and compact shape that is close to the diameter of the liquid feeding path, and can be integrated with, for example, a discharge part component of a device equipped with the electromagnetic pump. It is possible to obtain a pulsating water discharge device with a simplified liquid path.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 shows an electromagnetic pump according to Embodiment 1 of the present invention, and FIG. 2 shows parts of the electromagnetic pump.

  As shown in FIGS. 1 and 2, the electromagnetic pump 1 includes a cylindrical cylinder 2 and a plunger 3 that is built in the cylinder 2 and can swing in the axial direction. The plunger 3 is biased so that both ends thereof are moved to a return position by two springs 4 and 5. The plunger 3 is internally provided with a spherical suction check valve 6, and opens and closes the valve seat 8 while being lightly biased by a spring 7. The cylinder 2 is provided with an electromagnetic coil 10 wound around a coil bobbin 9 on the outer periphery thereof. A cylindrical suction joint 11 is disposed on the suction side of the cylinder 2, and a cylindrical discharge joint 12 is disposed on the discharge side of the cylinder 2. The discharge joint 12 is provided with a discharge check valve 13, and this discharge check valve 13 opens and closes the valve seat portion 15 while being lightly biased by a spring 14.

  A suction pipe 16 that supplies fluid to the electromagnetic pump 1 is connected to the suction joint 11. A discharge pipe 17 that discharges fluid is connected to the discharge joint 12. The fluid is sucked from the suction pipe 16 to the electromagnetic pump 1 by the electromagnetic pump 1 and discharged to the discharge pipe 17.

  The electromagnetic coil 10 has a circular shape whose outer diameter (perpendicular to the axial direction) circumscribes the outer periphery of the suction joint 11 or the discharge joint 12 and has a length in the axial direction of about 1 of the outer diameter. A predetermined wire is wound around a coil bobbin 9 made of a cylindrical nonmagnetic material so as to be 5 times or more. A flange portion is provided at each end of the coil bobbin 9 in the axial direction, and an electromagnetic coil 10 is formed by winding a wire between these flange portions. The coil bobbin 9 is set to have an inner diameter dimension slightly larger than the outer diameter dimension of the cylinder 2, so that an annular gap is formed between the coil bobbin 9 and the cylinder 2.

  A cylindrical discharge part magnetic body 18 having a flange 18a from the discharge joint 12 side is fitted into the annular gap, and a cylindrical suction part magnetic body 19 having a flange 19a from the suction joint 11 side is fitted to the cylinder 2 In addition, an internal magnetic path of the electromagnetic pump 1 is formed.

  On the outer periphery of the electromagnetic coil 10, a magnetic metal fitting 20 made of a magnetic material formed by a cylindrical pipe that circumscribes the outer periphery of the suction joint 11 or the discharge joint 12 is disposed. The magnetic metal fitting 20 is a structural material that forms an external magnetic path of the electromagnetic pump 1, and forms a magnetic circuit with the discharge portion magnetic body 18 and the suction portion magnetic body 19. This magnetic circuit transmits the magnetic force generated by the electromagnetic coil 10 from the discharge portion magnetic body 18 to the magnetic fitting 20 through the flange 18a, and further from the magnetic fitting 20 to the suction portion magnetic body 19 through the flange 19a. It is. The discharge part magnetic body 18 and the suction part magnetic body 19 are set to have a length dimension so that the respective distal end parts are separated by a predetermined length in a state where the discharge part magnetic body 18 and the suction part magnetic body 19 are fitted on the cylinder 2. A strong magnetic flux that moves the plunger 3 against the urging force of the springs 4 and 5 is generated in the magnetic body 19.

  In the present embodiment, the magnetic metal fitting 20 is configured such that both side ends in the axial center direction are bent or drawn inward to sandwich the flange portion of the suction joint 11 and the flange portion of the discharge joint 12 from both axial direction sides. It is, but is not limited to it. The magnetic bracket 20 may be a cylindrical pipe structure that circumscribes the outer periphery of the suction joint 11 and the discharge joint 12 as a whole. The flange portion of the suction joint 11 is in contact with the flange 19a, and the flange portion of the discharge joint 12 is in contact with the flange 18a. The electromagnetic coil 10 is connected to the drive control unit 21, and the electromagnetic coil 10 is intermittently excited. The plunger 3 is reciprocated by the generated magnetic force.

  The operation of the electromagnetic pump of the above embodiment will be described. The electromagnetic coil 10 is intermittently excited by the drive pulse supplied from the drive control unit 21, and the magnetic force generated thereby is transferred from the discharge unit magnetic body 18 to the magnetic fitting 20 through the flange 18a, and further from the magnetic fitting 20 to the flange. A magnetic circuit directed to the suction part magnetic body 19 through 19a is formed. As a result, a strong magnetic flux that moves the plunger 3 against the urging force of the springs 4 and 5 is generated, and the plunger 3 is moved toward the discharge joint 12 against the urging force of the springs 4 and 5. During this forward movement, the suction check valve 6 in the plunger 3 remains closed at the pressurized fluid pressure, but the fluid is discharged while the discharge check valve 13 on the discharge joint 12 side is pushed open by the fluid pressure. It can be discharged from the discharge joint 12.

  Thereafter, when the drive pulse is not energized to the electromagnetic coil 10, the electromagnetic force does not work, so the plunger 3 moves backward by the urging force of the springs 4, 5 and moves to the side opposite to the discharge joint 12 side. It will be. At the time of this backward movement, the suction check valve 6 in the plunger 3 is opened when the fluid inside the plunger 3 is depressurized, the liquid flows into the inside, and the discharge check valve 13 on the discharge joint 12 side is closed. Become. By repeating the above operations, liquid ejection control is performed.

  Here, since the magnetic metal fitting 20 is formed of a cylindrical pipe that covers the outer circumference of the electromagnetic coil 10 and circumscribes the outer circumference of the suction joint 11 and the discharge joint 12, the electromagnetic force generated by the electromagnetic coil 10 on the magnetic metal fitting 20. The plunger 3 can be reciprocated by securing a sufficient stroke by the electromagnetic force generated by the electromagnetic coil 10, and the outer diameter of the suction joint 11 and the discharge joint 12 can be achieved. Therefore, the liquid feeding path including the electromagnetic pump 1 can be made compact.

  In addition, since the magnetic metal fitting 20 is disposed so as to cover the outer periphery of the electromagnetic coil 10, the electromagnetic coil 10 is protected and can be prevented from being damaged, and a protective member such as a protective tape is unnecessary around the electromagnetic coil 10. It can be configured safely and inexpensively.

  Furthermore, since the outer diameter of the electromagnetic coil 10 is a circle having a size that circumscribes the outer periphery of the suction joint 11 or the discharge joint 12, the outer diameter of the electromagnetic coil 10 is reduced to obtain the same electromagnetic force. The length in the axial direction of the coil 10 is set to be approximately 1.5 times or more of the outer diameter so that the length in the axial direction of the coil 10 is longer than the outer diameter. Thereby, the number of turns of the electromagnetic coil 10 for securing the necessary magnetic force by the electromagnetic coil 10 can be secured, the outer diameter of the electromagnetic coil 10 can be reduced, and the surface area of the electromagnetic coil 10 is increased. The temperature rise at the time of energization of electromagnetic coil 10 can be reduced, and the capability of electromagnetic coil 10 can be enhanced.

  Further, when the outer diameter of the electromagnetic coil 10 is reduced, the winding length is shortened, and even if the number of turns is the same, the resistance of the electromagnetic coil 10 is reduced and current flows easily, and the magnetic force increases accordingly. In order to obtain the required magnetic force of 10, adjustment such as reducing the number of turns of the electromagnetic coil 10 or reducing the winding diameter of the electromagnetic coil 10 can be performed.

  That is, by disposing the magnetic metal fitting 20 so as to cover the outer periphery of the electromagnetic coil 10 and increasing the length of the electromagnetic coil 10 in the axial direction, the capability of the electromagnetic coil 10 can be further improved. The number of turns of 10 can be reduced, the outer diameter of the electromagnetic coil 10 can be reduced synergistically, and a more compact configuration can be achieved.

  In addition, although the electromagnetic pump was demonstrated with the structure which has a non-return valve, this may be the structure which does not have a non-return valve, and if the structure of each other part is the range which achieves the objective of this invention, the structure Can be anything.

(Embodiment 2)
FIG. 3 shows an electromagnetic pump according to Embodiment 2 of the present invention. Note that the present embodiment is different from the first embodiment only in the configuration to which the sealing means is added, and the same members are assigned the same numbers and only different portions will be described.

  As shown in FIG. 3, the magnetic metal fitting 31 is formed of a substantially cylindrical pipe that covers the outer circumference of the electromagnetic coil 32 and circumscribes the outer circumference of the suction joint 33 and the discharge joint 34, and the magnetic metal fitting 31 and the suction joint 33. A suction O-ring 33a is provided as a sealing means, and a discharge O-ring 34a is provided as a sealing means between the magnetic fitting 31 and the discharge joint 34.

  In this configuration, the electromagnetic coil 32 is covered with the magnetic metal fitting 31 and shielded from the outside air by the sealing means. For this reason, there is less possibility that the electromagnetic coil 32 will come into contact with moisture in the outside air, and there is no fear of leakage or short-circuiting of the electromagnetic coil 32, and safety is greatly improved.

(Embodiment 3)
FIG. 4 shows a pulsating water discharge device according to Embodiment 3 of the present invention, and FIG. 5 shows components of the pulsating water discharge device.

  As shown in FIG. 4, the pulsating water discharge device 41 includes a pulsation generating electromagnetic pump 43 (referred to as an electromagnetic pump) and an accumulator 44. The accumulator 44 is connected between a tap water supply pipe 42 and a suction joint 45 that guides the supplied water to the inside of the electromagnetic pump 43, and is formed of an elastic body tube having a predetermined length.

  The electromagnetic pump 43 includes a cylindrical cylinder 46 (cross-sectional hatching omitted) and a plunger 49 that is built in the cylinder 46 and can swing in the axial direction. The plunger 49 is disposed in a state where both ends thereof are biased so as to be moved to the return position by the two springs 47 and 48. The plunger 49 has a bypass passage 49 a at the center thereof, and the bypass passage 49 a communicates the suction joint 45 side of the passage in the cylinder 46 and the discharge joint 50 side of the electromagnetic pump 43.

  The bypass passage 49a has a maximum discharge pressure value that moves water downstream of the cylinder 46 when the plunger 49 moves to the discharge joint 50 side in response to the supply of the pulse voltage from the drive control unit 51 while water is being supplied. It is set so that the minimum value of the discharge pressure when the supply of the pulse voltage from the drive control unit 51 is stopped and the plunger 49 returns to the original value is lower than the pressure of the water flow to be supplied above the pressure of the water flow to be supplied. ing.

  On the discharge joint 50 side in the cylinder 46, a magnetic head 52 having a through hole that forms a passage for the water flow supplied to the central portion of the diameter is provided. The magnetic head 52 is magnetized by the action of the electromagnetic coil 54 provided on the outer periphery of the cylinder 46. The electromagnetic coil 54 is provided on the outer periphery of the cylinder 46, and is formed by winding a predetermined wire around a coil bobbin 53 made of a cylindrical nonmagnetic material.

  The electromagnetic pump 43 includes a cylindrical suction portion magnetic body 55 and a ring-shaped discharge portion magnetic body 56. The suction portion magnetic body 55 is provided between the outer periphery of the cylinder 46 on the suction joint 45 side and the coil bobbin 53 and has a flange 55 a that contacts the side wall of the coil bobbin 53. The discharge portion magnetic body 56 is disposed on the outer periphery of the cylinder 46 on the discharge joint 50 side where the magnetic head 52 is located so as to be in contact with the side wall of the coil bobbin 53.

  Further, the electromagnetic pump 43 includes a magnetic fitting 57 that forms a magnetic circuit by the magnetic force of energization of the electromagnetic coil 54 along the outer periphery of the electromagnetic coil 54. As shown in FIG. 5, the magnetic metal fitting 57 has a semi-cylindrical side wall 57 a circumscribing the outer periphery of the suction joint 45 or the discharge joint 50, and an end of the side wall a sandwiching the electromagnetic coil 54 from the axial direction. And a pressing wall 57b formed by bending. The contact portion 57c between the side wall 57a and the pressing wall 57b is integrally formed by drawing bending or welding, and has a substantially semicircular arc shape so as to follow the shape of the end portion of the side wall 57a.

  The pulsating water discharge device 41 includes a cleaning nozzle 58 on the discharge joint 50 side. The cleaning nozzle 58 has substantially the same outer diameter as the semi-cylindrical magnetic fitting 57 formed along the outer periphery of the electromagnetic coil 54, and pulsating water of large and small polka dots is generated by the pulsating pressure generated by the reciprocating motion of the plunger 49. Discharge.

  The pressing wall 57b of the magnetic metal fitting 57 has a low-cost and simple assembling configuration that does not require other parts by sandwiching the suction joint 45 and the discharge joint 50 together with the electromagnetic coil 54 from the axial direction.

  In the pulsating water discharge device 41 as described above, when the plunger 49 moves to the discharge joint 50 side in response to the supply of the pulse voltage from the drive control unit 51 in the water supply state, water is supplied to the downstream side of the cylinder 46. The maximum value of the discharge pressure to be moved is equal to or higher than the pressure of the water flow to be supplied, and the minimum value of the discharge pressure when the supply of the pulse voltage from the drive control unit 51 is stopped and the plunger 49 returns to the original value is the water flow to be supplied. The pressure is set to be lower than Thereby, pulsation pressure can be added to the water flow supplied with a uniform pressure.

  When the obtained pulsating water is discharged from the washing nozzle 58, it is ejected as pulsating water in the form of large and small polka dots, and as a result, a clear impact is caused by pulsation even with a small amount of water for washing.

  In this embodiment, since the check valve that closes at the time of discharge and opens when the plunger 49 returns to the return position after discharge is not provided in the plunger 49, the plunger 49 flows to the discharge joint 50 when returning to the return position. Do not disturb the water flow unnecessarily. As a result, clean large and small polka-dot pulsating water can be formed from the cleaning nozzle 58 by the pulsating pressure of the electromagnetic pump 43. This produces a clear impact due to pulsation even with a small amount of water, and can enhance the cleaning effect when used for cleaning.

  Here, since the magnetic metal fitting 57 is provided with a semi-cylindrical side wall 57 a circumscribing the outer circumference of the suction joint 45 or the discharge joint 50 along the outer circumference of the electromagnetic coil 54, the magnetic metal fitting 57 is generated by the electromagnetic coil 54. A powerful magnetic circuit is formed by electromagnetic force. For this reason, the plunger 49 can be reciprocated with a sufficient stroke, and the electromagnetic pump 1 can be made into a cylindrical and compact shape close to the diameter of the liquid feeding path. 50, and the liquid feeding path including the electromagnetic pump 43 can be made compact.

  Further, since the contact portion 57c between the side wall 57a and the pressing wall 57b of the magnetic metal fitting 57 is integrally formed by drawing bending or welding and has a substantially semicircular arc shape, the strength with which the pressing wall 57b sandwiches the electromagnetic coil 54 is structural. To be high. Therefore, when the electromagnetic coil 54, the suction joint 45, and the discharge joint 50 are both sandwiched at the same time, the electromagnetic force generated by the electromagnetic coil 54 should not damage the magnetic circuit formed by the magnetic fitting 57 and the plunger 49. The thickness of the magnetic metal fitting 57 can be reduced, and it can be constructed at low cost.

  Since the accumulator 44 formed of an elastic tube is connected to the suction joint 45, not only the thickness and strength of the tube but also the length thereof can be adjusted to easily and accurately adjust the pressure accumulation capacity. Further, the accumulator 44 function can be obtained with a shape equal to the outer diameter of the suction joint 45. For this reason, the electromagnetic pump 43 including the accumulator 44 can be made into a substantially cylindrical and compact shape close to the diameter of the liquid feeding path, and the liquid feeding path can be made compact without increasing the mounting space for the pulsating water discharge device 41. it can.

  In addition, the accumulator 44 formed of an elastic tube can connect the water supply pipe 42 and the suction joint 45 with a gentle curvature, so that the liquid feeding path can have a degree of freedom.

  In accumulators using general elastic membranes, it is necessary to adjust the pressure accumulation capacity by changing the film thickness, the membrane strength, or the size of the membrane, and it is difficult to adjust the accumulator accurately. There is a problem that the shape becomes large. On the other hand, the elastic tube has an advantage that the pressure accumulating capacity can be easily and accurately adjusted without expanding the mounting space by adjusting not only the thickness and strength of the tube but also its length.

  In the above description, the electromagnetic pump 43 having no check valve has been described. However, an electromagnetic pump having a conventional nozzle-shaped rubber tube duckbill valve as a check valve may be used. The configuration may be any as long as it is formed along the outer diameter and has a shape in which the liquid feeding path including the electromagnetic pump can be made compact. The configuration of each other part can be arbitrarily changed as long as the object of the present invention is achieved. In addition, the configuration in which the magnetic metal fitting is substantially cylindrical has a cylindrical shape if the magnetic metal fitting is manufactured by pipe or deep drawing, but does not necessarily have a cylindrical shape when processed from a flat plate. The shape of the magnetic metal fitting may be any shape that includes such a case and has a reduced outer diameter in accordance with the spirit of the invention. Further, when the length of the electromagnetic coil is approximately 1.5 times or more of the outer diameter, the coil diameter and length are 1: 1 (1 times) in the prior art, whereas in the present embodiment, 1. If it is 5 times or more, it is because the effect of the invention was acquired.

  The electromagnetic pump of the present invention and the pulsating water discharge device using the same can be used for a device with a cleaning function, for example, a jet bath, a hand shower for washing hands, a bubble jet type that brushes teeth by applying pulsating water to teeth It can be used in places where pulsating water flow is desired, such as toothpaste devices.

1 Electromagnetic pump 2, 46 Cylinder 3, 49 Plunger 10, 32, 54 Electromagnetic coil 11, 33, 45 Suction joint 12, 34, 50 Discharge joint 20, 31, 57 Magnetic bracket 33a Suction O-ring (sealing means)
34a Discharge O-ring (sealing means)
44 Accumulator 57a Side wall 57b of magnetic bracket Pressing wall 57c of magnetic bracket Contact portion

Claims (4)

A suction joint that forms a liquid suction flow path, a cylindrical discharge joint that forms a liquid discharge flow path, a cylindrical cylinder that forms a liquid flow path between the suction joint and the discharge joint, and A plunger that reciprocates in the axial direction in the cylinder, an electromagnetic coil that reciprocates the plunger with a magnetic force generated by energization on the outer periphery of the cylinder, and an electric current that is applied to the electromagnetic coil on the outer periphery of the electromagnetic coil With a magnetic bracket that forms a magnetic circuit by the magnetic force of the time,
The magnetic metal fitting is formed along the outer periphery of the electromagnetic coil, has a substantially semi-cylindrical side wall circumscribing the outer periphery of the suction joint and the discharge joint, and the suction joint and the discharge joint together with the electromagnetic coil. A pressing wall formed by bending the axial direction end of the side wall so as to be sandwiched from both sides in the direction, and a contact portion between the side wall and the pressing wall is substantially in line with the shape of the axial end of the side wall. An electromagnetic pump with a semicircular arc shape. The outer diameter of the electromagnetic coil is similar to a circle circumscribing the outer periphery of the suction joint or the discharge joint, and the axial length of the electromagnetic coil is approximately 1.5 times or more of the outer diameter. The electromagnetic pump according to claim 1 , wherein Wherein the suction joint, electromagnetic pump according to claim 1 or 2 linked to an accumulator formed in a predetermined length elastic tube. The pulsating water discharge apparatus using the electromagnetic pump as described in any one of Claims 1 thru | or 3 .