JP5872706B2 - Pulsating electromagnetic pump and pulsating water discharge device using the same - Google Patents

Description

  The present invention relates to an electromagnetic pump for generating pulsation that can pulsate tap water from a water supply pipe, for example, in a toilet seat with a cleaning function, and can eject pulsating water vigorously from the discharge port of a cleaning water nozzle that is a pulsating water discharge port. And a pulsating water discharge device using the same.

  Conventionally, there is known a pulsation generating electromagnetic pump that is used by being attached between a water supply pipe and a pulsating water discharge port and controlled by a control unit that periodically supplies a pulse voltage of a predetermined pattern when water is supplied from the water supply pipe. It has been. The electromagnetic pump generally includes a tubular cylinder in which an electromagnetic coil is provided on the outer periphery and water supplied from a water supply pipe flows therein, a magnetic head provided in the cylinder, an electromagnetic plunger piston, and the like. The magnetic head is attached to the downstream side in the cylinder and magnetized by the action of the electromagnetic coil. The electromagnetic plunger piston is provided on the upstream side in the cylinder so as to be able to reciprocate between a discharge position in contact with the magnetic head and a predetermined return position away from the discharge position. In addition, the cylinder is provided with a spring that urges the electromagnetic plunger piston so as to stop at the return position when water is supplied from the water supply pipe. The electromagnetic plunger piston has a through hole that communicates the downstream side and the upstream side of the passage in the cylinder, and a check valve that allows water to pass only from the water supply pipe toward the pulsating water discharge port.

  Patent Document 1 describes an electromagnetic pump having a nozzle-shaped rubber tube duckbill valve as a check valve. Patent Document 2 discloses a check that closes a through-hole with a valve that opens and closes by the force of a spring. An electromagnetic pump comprising a valve is disclosed.

Japanese Patent No. 4169306 Japanese Patent No. 3647356

  The check valve of the electromagnetic pump described in Patent Document 1 may fail due to deterioration of rubber due to aging, and the check valve of the electromagnetic pump described in Patent Document 2 fails due to its complicated configuration. There was a problem that it was easy.

  The present invention has been made to solve the above-described problems of the conventional example, and provides an in-line type pulsation generating electromagnetic pump having a structure not using a check valve and a pulsating water discharge device using the same. Objective.

In order to achieve the above object, the present invention is used by being attached between a water supply pipe and a pulsating water discharge port, and by a controller that periodically supplies a pulse voltage of a predetermined pattern when water is supplied from the water supply pipe. In the pulsation generating electromagnetic pump to be controlled, the electromagnetic coil is provided on the outer periphery, the tubular cylinder in which the water supply from the water supply pipe circulates, the downstream side in the cylinder, and the action of the electromagnetic coil A magnetic head to be magnetized, and an electromagnetic plunger piston provided so as to reciprocate between a discharge position in contact with the magnetic head and a predetermined return position away from the discharge position on the upstream side in the cylinder And a spring for urging the electromagnetic plunger piston to move to the return position, the electromagnetic plunger piston being the cylinder Of a through hole communicating with the downstream side and the upstream side of the passage, only the supply water pressure from the water supply pipe in a stopped state in which the pulse voltage from the controller is not applied is the electromagnetic plunger piston when acting When the downstream discharge pressure is a stop pressure, the hole size of the through hole is as follows: (a) the electromagnetic plunger piston discharges in response to the supply of pulse voltage from the control unit in the water supply state from the water supply pipe. The maximum value of the discharge pressure that moves water to the downstream side of the cylinder when moved to the position is approximately 1.5 times or more of the stop pressure, and (b) the electromagnetic plan after the application of the maximum value and the pulse voltage is stopped. the difference between the minimum value of the discharge pressure when the jar piston returns to the return position by the force of the spring, is set such that the stop pressure equal to or higher than that, provided the check valve in the through-hole Characterized in that it does not have.

  It is preferable that both ends of a predetermined length of the elastic tube are connected to a passage between the water supply pipe and the cylinder.

  The cylinder may be provided with a magnetic ring at a position adjacent to the electromagnetic coil so as to increase the force of pushing the electromagnetic plunger piston toward the magnetic head.

Further, the present invention provides an electromagnetic pump for generating pulsation that is used between a water supply pipe and a pulsating water discharge port, and discharges pulsating water from the pulsating water discharge port when water is supplied from the water supply pipe. And a control unit that periodically supplies a pulse voltage of a predetermined pattern to the pulsation generating electromagnetic pump, and the pulsation generating electromagnetic pump includes an electromagnetic coil provided on an outer periphery thereof, and includes an inside from the water supply pipe. A tubular cylinder through which the water supply flows, a magnetic head that is provided downstream of the cylinder and is magnetized by the action of the electromagnetic coil, and a discharge position that contacts the magnetic head on the upstream side of the cylinder An electromagnetic plunger piston provided so as to reciprocate between a predetermined return position away from the discharge position, and the electromagnetic plunger piston moved to the return position It includes a spring for energizing the said solenoid plunger piston has a through hole communicating with the downstream side and the upstream side of the passage in the cylinder, stop the pulse voltage is not applied from the control unit When the downstream discharge pressure of the electromagnetic plunger piston when only the feed water pressure from the feed water pipe acts in the state is the stop pressure, the hole size of the through hole is (a) in the feed water state from the feed pipe The maximum value of the discharge pressure that moves water to the downstream side of the cylinder when the electromagnetic plunger piston moves to the discharge position in response to the supply of the pulse voltage from the control unit is approximately 1.5 times or more the stop pressure. next, the difference between the minimum value of the discharge pressure in returning to the return position (b) said maximum value and said electromagnetic plunger piston of the spring force after stopping the application of the pulse voltage, Serial are set to be stopped pressure equal to or higher than, characterized in that provided with no check valve in the through-hole.

  In one cycle, the control unit (c) applies a pulse voltage only for a time during which the electromagnetic plunger piston can reach the discharge position, and discharges the main pulsating water having a discharge pressure equal to or higher than the discharge pressure reference value, (D) After application of the pulse voltage, the discharge pressure of the electromagnetic plunger piston that has returned to the return position by the force of the spring is such that the electromagnetic plunger piston stops at the return position when the electromagnetic pump is stopped. Performing a control to apply a pulse voltage for a time shorter than the time to discharge the sub pulsating water having a lower discharge pressure than the main pulsating water at a predetermined stop pressure timing that is the same as the stop pressure when For a short time, the discharge pressure of the electromagnetic plunger piston that has returned to the return position by the force of the spring after application of the pulse voltage for the short time is equal to the stop pressure. Timing becomes Flip is preferably a time such that the pulse voltage application timing for the main pulsating water discharge of the next period.

  It is preferable that both ends of a predetermined length of the elastic tube are connected to a passage between the water supply pipe and the cylinder.

  The cylinder may be provided with a magnetic ring at a position adjacent to the electromagnetic coil so as to increase the force of pushing the electromagnetic plunger piston toward the magnetic head.

  According to the present invention, it is desired as an electromagnetic pump by using an electromagnetic plunger piston having a through hole having a hole diameter that can obtain a discharge pressure equal to or higher than a discharge pressure reference value in accordance with a pulse voltage supplied from a control unit. While ensuring the output characteristics, the non-return valve which is one of the causes of failure can be eliminated to reduce the cause of failure of the electromagnetic pump, and the durability of the electromagnetic pump and the pulsating water discharge device using the same can be extended. It is to be noted that an accumulator function that allows easy adjustment of the stock pressure capability is added to the electromagnetic pump by connecting both ends of an elastic tube having a predetermined length to the passage between the water supply pipe and the cylinder of the electromagnetic pump. Can do.

The perspective view which shows the whole structure of the pulsating water discharge apparatus which concerns on embodiment of this invention. The exploded perspective view of the electromagnetic pump for pulsation generation with which the pulsation water discharge device is provided. Sectional drawing of the electromagnetic pump. The wave form diagram of the pulse voltage which supplies electric power to the same electromagnetic pump. The graph which shows the discharge pressure characteristic of an electromagnetic pump in case the diameter of the through-hole of the electromagnetic plunger piston of the same electromagnetic pump is (phi) = 1.6mm. The perspective view of the modification of the water supply components of the electromagnetic pump. The perspective view of the modification of the water supply components of the electromagnetic pump. Sectional drawing of the electromagnetic pump which concerns on the 1st modification which improved the electromagnetic pump used for the said embodiment. The graph which shows the discharge pressure characteristic of the electromagnetic pump which concerns on embodiment, and the electromagnetic pump which concerns on a 1st improvement example. Sectional drawing of the electromagnetic pump which concerns on the 2nd modification which improved the electromagnetic pump used for the said embodiment. The graph which shows the discharge pressure characteristic of the electromagnetic pump which concerns on embodiment, and the electromagnetic pump which concerns on a 2nd modification.

  The electromagnetic pump for generating pulsation according to the present invention has a difference between the minimum value of the discharge pressure when returning to the original return position after discharge and the maximum value at the same time as the maximum value of the discharge pressure is not less than the discharge pressure reference value. Is provided with an electromagnetic plunger piston having a through-hole having a hole diameter dimension equal to or greater than the pressure difference reference value. The through hole of the piston is not provided with a check valve that closes during discharge and opens when returning to the return position after discharge. By adopting this configuration, while ensuring the output characteristics desired as an electromagnetic pump, the non-return valve, which was one of the causes of failure, is eliminated to reduce the cause of failure of the electromagnetic pump, and the durability of the electromagnetic pump is greatly improved. Stretch.

  FIG. 1 shows a pulsating water discharge device 1 used by being attached to a toilet seat with a cleaning function, for example. The pulsating water discharge device 1 includes a solenoid valve 3 connected to a tap water supply pipe 2, a pulsation generating electromagnetic pump 5 connected via a separate water supply pipe 4 on the downstream side of the solenoid valve 3, and A cleaning nozzle 6 (pulsating water discharge port) attached to the discharge port of the electromagnetic pump 5 and a control unit 7 are provided.

  The control unit 7 includes a switch 7a. When the switch 7a is pressed, the control unit 7 opens the electromagnetic valve 3, and periodically supplies a pulse voltage of a predetermined pattern to the electromagnetic pump 5. The control unit includes a radio signal receiver 7b. When the radio signal indicating that the switch 7d is pressed from the wireless remote controller 7c is received by the receiver 7b, the electromagnetic valve 3 is opened and the electromagnetic pump 5 is connected to the electromagnetic pump 5. Supply power. When the switch 7a is pressed again, or when the receiver 7b receives again a radio signal transmitted from the wireless remote controller 7c in response to pressing of the switch 7d, the control unit 7 closes the solenoid valve 3 and supplies power. Stop.

  The electromagnetic pump 5 operates in response to the application of the pulse voltage, and discharges pulsating water by adjusting the pulsating pressure of tap water supplied at a uniform pressure. The pulsating water discharged from the electromagnetic pump 5 is ejected vigorously from the discharge port of the nozzle 6.

  2 and 3 show the configuration of the electromagnetic pump 5. The electromagnetic pump 5 includes, in order from the upstream side, a water supply part 8 with an accumulator function that guides the supplied water to the inside of the pump 5, and a piston that pulsates and discharges water supplied from the water supply part 8 by operating with a pulse voltage. Part 9. Further, the electromagnetic pump 5 supplies water as shown by arrows 20 and 21 indicated by solid lines in the drawing, and a discharge-side component 10 for sending pulsating water discharged from the piston portion 9 to an external nozzle 6. And a fastener 11 that is sandwiched and fixed between the component 8 and the discharge-side component 10.

  The water supply component 8 has predetermined openings in which both end openings 8f and 8g are connected to a water supply port 8a, a discharge port 8c communicating with the water supply port 8a through a passage 8b, and branch pipes 8d and 8e extending from the passage 8b. And a long elastic tube 8h. The elastic tube 8h functions as an accumulator.

  In an accumulator using a general elastic film, it is necessary to change the film thickness, the film strength, or the size of the film to adjust the animal pressure capability, and it is difficult to adjust accurately. Compared to this, the elastic tube 8h has an advantage that the animal pressure capacity can be adjusted very easily and accurately without expanding the mounting space by adjusting not only the thickness and strength of the tube but also its length. The accumulator constituted by this elastic tube 8h can be used not only for the electromagnetic pump 5 but also for a conventional electromagnetic pump provided with a check valve in the piston 9e.

  The piston portion 9 includes an electromagnetic coil 9b fixed to the fastener 9a, and a tubular cylinder 9c in which the electromagnetic coil 9b is provided on the outer periphery and in which water supplied from the discharge port 8c of the water supply component 8 flows. The cylinder 9c includes a magnetic head 9d that is provided on the downstream side thereof and is magnetized by the action of the electromagnetic coil 9b, and an electromagnetic plunger piston 9e. The electromagnetic plunger piston 9e reciprocates between the discharge position (P1) contacting the magnetic head 9d and a predetermined return position (P2) away from the discharge position (interval L1) on the upstream side in the cylinder 9c. It is provided freely. The piston 9e is biased so as to be moved to the return position by the two springs 9f and 9g. On both sides of the cylinder 9c, rubber seals 9h and 9i used when the cylinder 9c is sandwiched and fixed between the water supply component 8 and the discharge side component 10 are provided. The spring 9f acts so that the upstream side contacts the discharge port 8c of the water supply component 8 and the downstream side contacts the piston 9e to push the piston 9e downstream. The spring 9g passes through a through-hole 9j provided in the magnetic head 9d in a telescopic manner, and the upstream side abuts on the piston 9e, the downstream side abuts on the discharge side component 10, and acts to push the piston 9e upstream. To do. By the action of the springs 9f and 9g, the piston 9e is always urged to return to the return position.

  The piston 9e has a through hole 9k that communicates the downstream side and the upstream side of the passage in the cylinder 9c. The diameter of the through hole 9k is as follows: (a) When the solenoid valve 3 is opened and the water supply pipe 2 is supplying water, the piston 9e moves to the discharge position in response to the supply of pulse voltage from the control unit 7. The maximum value of the discharge pressure that moves water downstream becomes equal to or greater than a predetermined discharge pressure reference value. (B) When the piston 9e returns to the return position by the force of the springs 9f and 9g after the application of the pulse voltage is stopped. The difference from the minimum value of the discharge pressure is set to be equal to or greater than a predetermined pressure difference reference value. Thereby, the electromagnetic pump 5 can discharge polka-dot pulsating water.

  The discharge-side component 10 includes a water supply port 10a having substantially the same diameter as the through hole 9j of the magnetic head 9d, a discharge port 10b communicating with the water supply port 10a, and a seal 10c used when the nozzle 6 is attached.

  In the electromagnetic pump 5 having the above-described configuration, the check hole is not provided in the through hole 9k of the piston 9e, which is closed when discharged and opened when returning to the return position after discharge. The piston 5e does not unnecessarily disturb the water flow flowing toward the discharge port when returning to the return position, and as a result, the electromagnetic pump 5 can form clean polka-shaped pulsating water only by the pulsating pressure. . This produces a clear impact due to pulsation even with a small amount of water, and has the effect of enhancing the cleaning effect when used for cleaning, for example.

  Hereinafter, with reference to FIG. 3, FIG. 4A, FIG. 4B, the setting standard of the hole diameter R2 of the through hole 9k of the piston 9e will be described while showing specific dimensions and experimental data for the example of the electromagnetic pump 5. To do. The inner diameter R1 of the cylinder 9c is 8 mm, and the outer diameter of the piston 9e that is slidable inside is about 8 mm, which is slightly smaller than this. The hole diameter R2 of the through hole 9k of the piston 9e is 1.6 mm. The hole diameter R3 of the through hole 9j of the magnetic head 9d is 4.0 mm. A recess 9l into which the end of the spring 9g is fitted is provided on the downstream side of the piston 9e. The distance between the discharge position P1 and the return position P2 of the piston 9e, that is, the stroke L1 of the piston 9e is 2.34 mm. The magnetic head 9d and the piston 9e have inclined surfaces that face each other. The set load of the springs 9f, 9g is determined by the relationship between the tap water pressure (generally around 100 kPa) and the propulsive force of the piston 9e when a pulse voltage is applied, the piston 9e is placed at the return position P2 when stopped, and During driving, the piston 9e moves to the position P1 where it abuts against the magnetic head 9d, and is a value that satisfies the condition that a desired discharge pressure can be output, for example, a value of about 400 gf to 1100 gf.

  FIG. 4A shows a pulse voltage waveform applied from the control unit 7 to the coil 9b in the pulsating water discharge device 1 using the electromagnetic pump 5 having the above configuration. The output of the pulse voltage is a constant voltage Vcc (for example, 24 V), and the period T is, for example, 0.020 sec. The control unit 7 outputs a pulse voltage at a predetermined timing within one cycle T for a long time TL (for example, 4.2 msec) and a short time TS (for example, 1.5 msec).

  FIG. 4B is actual measurement data of the discharge pressure of the electromagnetic pump 5 having the above configuration. In the figure, the horizontal axis is time, the vertical axis is pressure, and the data shown by the solid line is the data on the downstream side of the piston 9e in the operation state in which the pulse voltage is applied from the control unit 7 to the electromagnetic pump 5 at the timing shown in FIG. 4A. The discharge pressure DP is actually measured at a predetermined time interval. The data indicated by the dotted line is a graph of the discharge pressure on the downstream side of the piston 9e when only the pressure of tap water is applied when the electromagnetic valve 3 is opened in a stopped state where no pulse voltage is applied from the control unit 7. Hereinafter, the discharge pressure indicated by the dotted line is referred to as stop pressure. The stop pressure is about 99 kPa. Point A represents the discharge pressure DP (= 81 kPa) when the pulse voltage is applied for a short time TS and then returned to the return position P2 by the force of the springs 9f and 9g. Point B represents the maximum value DPmax (= 156 kPa) of the discharge pressure obtained when the pulse voltage is applied for a relatively long time TL at the timing when the pressure returns to the stop pressure due to the pressure of tap water from the water supply pipe 4. Point C indicates the minimum value DPmin (= 34 kPa) of the discharge pressure when the spring 9f and 9g return to the return position P2 thereafter. Point D indicates the discharge pressure DP (= 126 kPa) obtained when the pulse voltage is again applied for a short time TS at the timing when the pressure returns to the stop pressure due to the pressure of tap water from the water supply pipe 4. According to the application of the pulse voltage by the control unit 7, the points A, B, C, D and the discharge pressure are repeatedly changed.

  The reason why the pulse voltage is applied again for a short time TS in one period T is to make a large and small polka dot portion. The value of the short time TS is set so that the timing at which the discharge pressure becomes the same as the stop pressure after applying the pulse voltage for a short time coincides with the pulse voltage application timing of the next long time. By setting the short time TS to such a value, the discharge pressure becomes a stop pressure before the end of one cycle T, thereby preventing a non-pulsating portion from being formed. If desired, the value of time TS can be further shortened to create a non-pulsating portion between large and small polka dots.

  In practice, the maximum value DPmax of the discharge pressure is desired to be equal to or higher than the discharge pressure reference value (DPref) (= 150 kPa). Further, the difference PD (= DPmax−DPmin) between the maximum value and the minimum value of the discharge pressure is desirably equal to or greater than the pressure difference reference value (PDref) (= 100 kPa). The electromagnetic pump 5 of this embodiment satisfies this criterion.

  The electromagnetic pump 5 satisfying such a desired output condition does not include a check valve for the piston through-hole, which is one of the causes of failure in the conventional electromagnetic pump, and thus has few failures and has been dramatically improved. Excellent durability.

  The value of the hole diameter R2 of the through hole 9k of the piston 9e was changed to φ = 1.2mm, 1.4mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 3.0mm, 3.5mm. In this case, the discharge pressure DP on the downstream side of the piston 9e when the pulse voltage shown in FIG. 4A was applied was measured at predetermined time intervals. Table 1 shows the discharge pressures (kPa) at points A to D shown in FIG. 4B for each value of the hole diameter R2.

  Table 1 shows, from the left end, “the value of the hole diameter dimension R2 of the through hole 9k of the piston 9e”, “the amount of water (ml / min) flowing into the through hole 9k of the piston 9e when the pulse voltage is not completely applied”, “ Indicates the pressure on the upstream side of the piston 9e and the stop pressure on the downstream side when stopped, "discharge pressure at points A to D detected when pulse voltage is applied", and "difference PD between maximum and minimum discharge pressures" .

  From Table 1, when the value of the hole diameter R2 of the through hole 9k is φ = 1.6 mm to 2.0 mm, the maximum value DPmax of the discharge pressure detected at the point B is equal to or greater than the discharge pressure reference value DPref (= 150 kPa). In addition, it can be seen that the difference PD between the maximum value and the minimum value of the discharge pressure (“discharge pressure at point B” − “discharge pressure at point C”) is equal to or greater than the pressure difference reference value PDref (= 100 kPa).

  5A and 5B show a modification of the water supply component 8 having an accumulator function. In the figure, the same components as those of the water supply component 8 are denoted by the same reference numerals, and redundant description is omitted. In any modification, both ends of the elastic tubes 8i and 8j having a predetermined length are connected to the branch pipe of the passage 8b between the water supply port 8a and the discharge port 8c. These modifications also have the advantage that the animal pressure capacity can be adjusted very simply by simply changing the length of the elastic tubes 8i, 8j.

  The pulsation generating electromagnetic pump and the pulsating water discharge device using the pulsation generating pump having the above-described configuration ensure desired output characteristics, that is, have a difference between a desired discharge pressure and a maximum value and a minimum value of the discharge pressure. However, the non-return valve, which was one of the causes of the failure, is eliminated to reduce the cause of the failure of the electromagnetic pump, thereby having excellent durability that has been dramatically improved.

  In addition, this invention is not restricted to the structure of the said various embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. For example, a configuration may be employed in which a coil is inserted into the elastic tube 8h of the water supply component 8 to prevent the elastic tube 8h from being bent and closing the passage.

  As a modified example of the electromagnetic pump 5, a magnetic ring is provided on the cylinder 9c adjacent to the electromagnetic coil 9b, for example, on the side close to the discharge port 8c, so as to increase the force of pushing the electromagnetic plunger piston 9e toward the magnetic head 9d. An addition may be made (see the magnetic ring 12 shown in FIG. 8). With this configuration, the maximum value DPmax of the discharge pressure can be increased.

  FIG. 6 shows an electromagnetic pump 5A according to a first improved example in which the electromagnetic pump 5 used in the above embodiment is improved. In the figure, the same components as those of the electromagnetic pump 5 are denoted by the same reference numerals, and redundant description is omitted. In this electromagnetic pump 5A, the stroke of the piston 9e is lengthened by reducing the set load of the spring 9g for returning the piston 9e of the electromagnetic pump 5 to the return position and shortening the magnetic head 9d. For example, when the pulsating water discharge device 1 is used for a toilet seat with a cleaning function, if the difference PD between the maximum value DPmax and the minimum value DPmin of the discharge pressure is too large, it may not be preferable for some users. In this case, as long as the conditions regarding the set load of the springs 9f and 9g described above are satisfied, the electromagnetic pump 5A reduces the set load of the spring 9g of the electromagnetic pump 5 and sets the minimum value DPmin of the discharge pressure slightly higher. . When the set load of the spring 9g is reduced, the force that pushes the piston 9e toward the magnetic head 9d is increased, and the piston 9e may hit the magnetic head 9d strongly and may make a sound. In order to eliminate such noise, the electromagnetic pump 5A shortens the stroke of the piston 9e by shortening the magnetic head 9d to L2, which is longer than L1 in the case of the electromagnetic pump 5.

  FIG. 7 shows discharge pressure characteristics of the electromagnetic pump 5 as an embodiment and the electromagnetic pump 5A according to the first improved example. The solid line shows the discharge pressure characteristic of the electromagnetic pump 5A when the diameter of the through hole 9k of the piston 9e is φ = 1.6 mm, and the dotted line shows the case where the diameter of the through hole 9k of the piston 9e is φ = 1.6 mm. The discharge pressure characteristic of the electromagnetic pump 5 is shown. From the figure, it can be seen that the electromagnetic pump 5A has a slightly lower maximum discharge pressure value than the electromagnetic pump 5, the minimum discharge pressure value DPmin is higher, and the difference PD is smaller.

  In the electromagnetic pump 5A of the first improved example, the force pushing the electromagnetic plunger piston 9e toward the magnetic head 9d due to the shortening of the length of the magnetic head 9d is reduced. For this reason, the maximum value DPmax of the discharge pressure is smaller than that of the electromagnetic pump 5. Depending on this value, the maximum value DPmax of the discharge pressure is not less than the discharge pressure reference value DPref and the difference PD is not less than the pressure difference reference value PDref, so it is necessary to supplement the maximum discharge pressure DPmax.

  FIG. 8 shows an electromagnetic pump 5B according to a second improved example in which the electromagnetic pump 5A according to the first improved example is further improved. In the figure, the same components as those of the electromagnetic pump 5 are denoted by the same reference numerals, and redundant description is omitted. The electromagnetic pump 5B is configured such that a magnetic ring 12 is added to a position adjacent to the electromagnetic coil 9b of the cylinder 9c of the electromagnetic pump 5A, for example, the side close to the water supply component 8.

  FIG. 9 shows discharge pressure characteristics of the electromagnetic pump 5 as an embodiment and the electromagnetic pump 5B according to the second improved example. The solid line shows the discharge pressure characteristic of the electromagnetic pump 5B when the diameter of the through hole 9k of the piston 9e is φ = 1.6 mm, and the dotted line shows the case where the diameter of the through hole 9k of the piston 9e is φ = 1.6 mm. The discharge pressure characteristic of the electromagnetic pump 5 is shown. The electromagnetic pump 5 </ b> B has a higher discharge pressure maximum value DPmax than the electromagnetic pump 5. As is clear from FIG. 7, the electromagnetic pump 5B has a higher discharge pressure maximum value DPmax than the electromagnetic pump 5A according to the first improved example. Thus, the maximum value DPmax of the discharge pressure can be increased by using the magnetic ring 12 as necessary.

  The pulsation generating electromagnetic pump of the present invention and the pulsating water discharge device using the pulsation generating pump can be used for a toilet seat with a cleaning function. For example, a jet bath, a hand shower for washing hands, and brushing teeth by applying pulsating water to teeth. It can be used where a pulsating water flow is desired, such as a bubble jet toothpaste device.

1 Pulsating water discharge device 4 Water supply pipe 5, 5A, 5B Pulsation generating electromagnetic pump 6 Nozzle (Pulsating water discharge port)
7 Control unit 8h Elastic tube 9c Cylinder 9d Magnetic head 9e Electromagnetic plunger piston 9k Through hole 12 Magnetic ring DPmax Maximum discharge pressure DPmin Minimum discharge pressure

Claims (7)

In the pulsation generating electromagnetic pump that is used by being attached between a water supply pipe and a pulsating water discharge port and controlled by a control unit that periodically supplies a pulse voltage of a predetermined pattern when water is supplied from the water supply pipe,
An electromagnetic coil is provided on the outer periphery, and a tubular cylinder in which water supplied from the water supply pipe circulates,
A magnetic head provided on the downstream side in the cylinder and magnetized by the action of the electromagnetic coil;
An electromagnetic plunger piston provided on the upstream side in the cylinder so as to be capable of reciprocating between a discharge position in contact with the magnetic head and a predetermined return position away from the discharge position;
A spring that urges the electromagnetic plunger piston to move to the return position,
The electromagnetic plunger piston has a through hole that communicates the downstream side and the upstream side of the passage in the cylinder,
When the downstream discharge pressure of the electromagnetic plunger piston when only the feed water pressure from the feed water pipe acts in the stop state where the pulse voltage is not applied from the control unit is the stop pressure,
The hole size of the through hole is (a) when the electromagnetic plunger piston moves to the discharge position in response to the supply of pulse voltage from the control unit in the water supply state from the water supply pipe. The maximum value of the discharge pressure for moving water is about 1.5 times or more the stop pressure, and (b) the electromagnetic plunger piston is returned to the return position by the force of the spring after the application of the maximum value and the pulse voltage is stopped. A pulsation generating electromagnetic pump characterized in that a difference from the minimum value of the discharge pressure when returning is equal to or more than the stop pressure, and no check valve is provided in the through hole. .   The pulsation generating electromagnetic pump according to claim 1, wherein both ends of an elastic tube having a predetermined length are connected to a passage between the water supply pipe and the cylinder.   The magnetic ring is provided in the adjacent position of the said electromagnetic coil so that the force which pushes the said electromagnetic plunger piston to the said magnetic head may be strengthened in the said cylinder, The Claim 1 or Claim 2 characterized by the above-mentioned. The described electromagnetic pump for generating pulsation. A pulsation generating electromagnetic pump that is used by being attached between a water supply pipe and a pulsating water discharge port, and the pulsation generating electromagnetic wave so that pulsating water is discharged from the pulsating water discharge port when water is supplied from the water supply pipe. And a control unit that periodically supplies a pulse voltage of a predetermined pattern to the pump,
The pulsation generating electromagnetic pump has a tubular cylinder in which an electromagnetic coil is provided on the outer periphery, and water supply from the water supply pipe circulates therein.
A magnetic head provided on the downstream side in the cylinder and magnetized by the action of the electromagnetic coil;
An electromagnetic plunger piston provided on the upstream side in the cylinder so as to be capable of reciprocating between a discharge position in contact with the magnetic head and a predetermined return position away from the discharge position;
A spring that urges the electromagnetic plunger piston to move to the return position,
The electromagnetic plunger piston has a through hole that communicates the downstream side and the upstream side of the passage in the cylinder,
When the downstream discharge pressure of the electromagnetic plunger piston when only the feed water pressure from the feed water pipe acts in the stop state where the pulse voltage is not applied from the control unit is the stop pressure,
The hole size of the through hole is (a) when the electromagnetic plunger piston moves to the discharge position in response to the supply of pulse voltage from the control unit in the water supply state from the water supply pipe. The maximum value of the discharge pressure for moving water is about 1.5 times or more the stop pressure, and (b) the electromagnetic plunger piston is returned to the return position by the force of the spring after the application of the maximum value and the pulse voltage is stopped. A pulsating water discharge device, wherein a difference from the minimum value of the discharge pressure when returning is set to be equal to or greater than the stop pressure, and a check valve is not provided in the through hole . In one cycle, the control unit (c) applies a pulse voltage only for a time during which the electromagnetic plunger piston can reach the discharge position, and discharges the main pulsating water having a discharge pressure equal to or higher than the discharge pressure reference value, (D) After application of the pulse voltage, the discharge pressure of the electromagnetic plunger piston that has returned to the return position by the force of the spring is such that the electromagnetic plunger piston stops at the return position when the electromagnetic pump is stopped. A predetermined stop pressure timing that is the same as the stop pressure at the time of being applied, a pulse voltage is applied only for a time shorter than the time, and a control is performed to discharge sub pulsating water having a discharge pressure lower than the main pulsating water,
The short time is the main pulsation of the next cycle when the discharge pressure of the electromagnetic plunger piston returned to the return position by the spring force after applying the pulse voltage for the short time is the same as the stop pressure. The pulsating water discharge device according to claim 4, wherein the pulsating water discharge device has a time that is a pulse voltage application timing for water discharge.   The pulsating water discharge device according to claim 4 or 5, wherein both ends of an elastic tube having a predetermined length are connected to a passage between the water supply pipe and the cylinder.   The magnetic cylinder is provided in the said adjacent position of the said electromagnetic coil so that the force which pushes the said electromagnetic plunger piston to the said magnetic head may be strengthened in the said cylinder. The pulsating water discharge device according to any one of the above.

Images