JP6488209B2 - Pulsation generating electromagnetic pump and pulsating water discharge device - 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, a pulsation generating electromagnetic pump that is attached between a water supply pipe and a pulsating water discharge port and is controlled by a control unit that periodically supplies a pulse voltage of a predetermined pattern when water is supplied from the water supply pipe is known. . In general, an electromagnetic pump includes a tubular cylinder having an electromagnetic coil provided on the outer periphery, in which water supplied from a water supply pipe flows, and a magnetic head, a plunger, and the like provided in the cylinder. The magnetic head is attached to the downstream side in the cylinder and magnetized by the action of the electromagnetic coil. The plunger is provided in the cylinder so as to be capable of reciprocating between a discharge position contacting the magnetic head and a predetermined return position. A spring is provided in the cylinder for biasing the plunger so as to stop at the return position when water is supplied from the water supply pipe. The plunger 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 flow only from the water supply pipe toward the pulsating water discharge port.

  As a check valve structure, an electromagnetic pump including a nozzle-shaped rubber tube duck bill valve as a check valve is known (for example, see Patent Document 1). An electromagnetic pump having a check valve that closes a through hole with a valve that opens and closes by the force of a spring is known (for example, see Patent Document 2). The check valve of the electromagnetic pump shown in the former has a problem that rubber may deteriorate due to deterioration over time, and the check valve of the electromagnetic pump shown in the latter has a problem that it is easy to break down due to its complicated structure. was there.

  Therefore, the present inventor has developed a pulsation generating electromagnetic pump having a structure that does not use a check valve and a pulsating water discharge device using the same (for example, see Patent Document 3). According to this, since the plunger has a through-hole, and there is no check valve that opens when the plunger returns to the return position after discharge, the outlet port side when the plunger returns to the return position As a result, the electromagnetic pump 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. And the non-return valve which was one of the causes of failure can be eliminated, the cause of failure of the electromagnetic pump can be reduced, and the durability of the electromagnetic pump and the pulsating water discharge device using the same can be extended.

Japanese Patent No. 4169306 Japanese Patent No. 3647356 WO2014 / 163000A1 publication

  However, since the plunger having the through hole as described above is hollow, the magnetic flux density is lower than that of the hollow one, and the electromagnetic coil that drives the plunger that reciprocates in the cylinder is inevitably coiled. It was necessary to increase the capacity by increasing the number or passing a large amount of current. In addition, the shape of the plunger is thin and long, and it is difficult in processing to accurately form a thin and long through hole in the center of the plunger. It took a lot of time and was expensive.

  The present invention has been made in order to solve the above-described problems, and can increase the magnetic flux density of the plunger with a structure that does not use a check valve so that the electromagnetic coil can be operated efficiently, and the plunger is processed. It is an object of the present invention to provide an in-line type pulsation generating electromagnetic pump that can be manufactured at low cost and a pulsating water discharge device using the same.

In order to achieve the above object, the present invention is used by being attached between a water supply pipe for taking in a water flow and a pulsating water discharge outlet for discharging pulsating water, and applying a pulse voltage of a predetermined pattern when water is supplied from the water supply pipe. In the electromagnetic pump for generating pulsation controlled by a control unit that periodically supplies power, the electromagnetic pump for generating pulsation is provided with a feeding unit that is connected to a water supply pipe and takes in a water flow, an electromagnetic coil is provided on the outer periphery, and the supply A tubular cylinder that circulates the water flow from the inlet, a plunger that is located in the cylinder and is supported by a spring that urges the front and back, and is provided in a freely reciprocating manner, and a water flow supplied by the reciprocating motion of the plunger to a discharge portion for discharging the pulsating water appended pulsation pressure, on the downstream side in the cylinder, magnetic aspirating the plunger which is magnetized by the action of an electromagnetic coil Comprising a head, a maximum discharge pressure of the pulsation water of the discharge portion, the higher than the pressure of the water flow supplied from the water supply pipe, the minimum discharge pressure pulsation water of the discharge portion is supplied from the water supply pipe A bypass passage is provided between the cylinder and the plunger so as to be lower than the pressure of the water flow, and a check valve is provided in the electromagnetic pump. In addition, the bypass path is formed by providing a groove-like cut in the outer periphery without providing a case covering the outer periphery of the plunger, and the magnetic head serves as a passage for the supplied water flow. Having a through-hole in the center of the diameter, and when the plunger is attracted, the magnetic head and the plunger approach each other, and the water flow path that flows through the bypass path provided on the outer periphery of the plunger is narrowed Special To.

  The groove-shaped cut is preferably chamfered so that no edge is generated.

  The bypass path is preferably formed so that the position of the center of gravity of the cross section in the radial direction of the plunger coincides with the center position of the cross section in the radial direction of the cylinder.

  The present invention is a pulsating water discharge device using the pulsation generating electromagnetic pump.

  According to the electromagnetic pump for generating pulsation of the present invention, the bypass passage that communicates the supply portion side and the discharge portion side is disposed between the cylinder and the plunger, so that the pulsating water is vigorously discharged from the pulsating water discharge port. By ejecting, a small and large polka-shaped pulsating water flow is formed, and even a small amount of water produces a clear impact due to the pulsation, and the cleaning effect when used for cleaning, for example, can be enhanced. Moreover, the non-return valve which was 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 can be extended.

  In addition, if the bypass path is formed by providing a groove-shaped cut on the outer periphery of the plunger, the capacity of the electromagnetic coil can be fully exerted, the sliding resistance with the plunger can be reduced, and the bypass path can be easily made. It can be formed with high accuracy and can be configured at low cost and with low power consumption.

The perspective view which shows the whole structure of the pulsating water discharge apparatus in Embodiment 1 of this invention. The disassembled perspective view of the electromagnetic pump for pulsation generation with which the pulsating water discharge apparatus is provided. Sectional drawing of an electromagnetic pump. The principal part sectional drawing of an electromagnetic pump. (A), (b), (c) is sectional drawing of the plunger which arrange | positioned the bypass path of the other shape of an electromagnetic pump. Sectional drawing of the principal part in Embodiment 2 of this invention. (A), (b), (c) is sectional drawing of the plunger which arrange | positioned the bypass path of the other shape of an electromagnetic pump.

  The electromagnetic pump for generating pulsation according to the present invention is used by being attached between a water supply pipe that takes in a water flow and a pulsating water discharge outlet that discharges pulsating water, and periodically applies a pulse voltage of a predetermined pattern when water is supplied from the water supply pipe. In the pulsation generating electromagnetic pump controlled by the control unit that supplies power to the pulsation, the pulsation generating electromagnetic pump is connected to a water supply pipe and is provided with a feeding part for taking in a water flow, an electromagnetic coil is provided on the outer periphery, and a water flow from the feeding part is provided inside. A pulsating pressure is added to the supplied water flow by the reciprocating motion of the plunger, which is provided in the cylinder and supported by a spring that urges the front and rear, and is reciprocated. A discharge unit that discharges the pulsating water that has been discharged, and the maximum discharge pressure of the pulsating water in the discharge unit is higher than the pressure of the water flow supplied from the water supply pipe, But to be lower than the pressure of the water flow supplied from the water supply pipe, between the cylinder and the plunger, it is constituted which is disposed a bypass passage communicating the inlet section and a discharge section.

  The bypass path can be formed by providing a groove-shaped cut on the outer periphery of the plunger. The configuration is not limited to this.

  Pulsating water with pulsating pressure applied to the supplied water flow is vigorously ejected from the discharge part by the reciprocating motion of the plunger provided with a bypass passage communicating the supply part and the discharge part. A water stream can be formed. By using this pulsating water flow that changes the pulsation for cleaning, it is possible to improve the feeling of use and increase the cleaning power.

  Here, the pulsation pressure added to the supplied water flow by the reciprocation of the plunger will be described. The electromagnetic coil periodically feeds a pulse voltage of a predetermined pattern from the control unit, and when the power is fed, the plunger is attracted to the discharge unit side by the magnetic force generated, and when the feeding is stopped, Return the plunger to its original position by the spring. By repeating this, the plunger reciprocates in the cylinder.

  When the plunger is attracted and moved to the discharge part by the magnetic force generated in the electromagnetic coil by energizing the electromagnetic coil, the supplied water flow is pushed out to the discharge part by the plunger. Get higher. Also, when the plunger returns to its original position by the spring that energizes by stopping energization of the electromagnetic coil, the supplied water flow is pushed back to the inlet by the plunger, so the discharge pressure of the discharge part is low. Become.

  Here, since a bypass passage is provided between the cylinder and the plunger so as to communicate the feeding portion and the discharge portion, the operation of increasing the discharge pressure of the discharge portion and the discharge pressure of the discharge portion are low. By this operation, pulsation pressure is added to the water flow passing through the bypass passage, and the maximum discharge pressure of the discharge part is accurately higher than the pressure of the water flow supplied from the water supply pipe, and the minimum discharge pressure of the discharge part is The pulsating water which becomes lower than the pressure of the water flow supplied from the is obtained.

  Here, if the bypass path is formed by providing a groove-shaped notch on the outer periphery of the plunger, it can be easily set so as to generate a clear impact due to pulsation even with a small amount of water. For example, cleaning when used for cleaning The effect can be enhanced.

  In addition, since the plunger is not hollow, the magnetic flux density is higher than that of the hollow one, and the ability of the electromagnetic coil to drive the plunger that reciprocates in the cylinder can be fully demonstrated. Since it is not necessary to increase the number of coil turns or to increase the number of coil turns, it is not necessary to increase the number of coil turns, so that it is not necessary to increase the number of coil turns.

  In addition, when the bypass path is configured by a groove-shaped notch, it can be easily formed because it is disposed on the outer periphery of the plunger.For example, the groove-shaped notch can be formed by drawing or cutting at the material stage of the plunger round bar. By adopting a method such as forming continuously and then cutting and finishing to the length of the plunger, the workability can be greatly improved and the production can be made at low cost.

  In addition, since the contact area of the plunger with the reciprocating cylinder becomes smaller, the sliding resistance between the cylinder and the plunger becomes smaller, and the reciprocating movement of the plunger can be made smoother. The pulsation pressure can be applied more effectively.

  Further, the bypass path formed by providing a groove-shaped cut on the outer periphery of the plunger may be chamfered so that no edge is generated at the end thereof.

  By chamfering the edges of the bypass path so that no edges are generated, the plunger can be prevented from scratching when contacting the reciprocating cylinder, and the sliding resistance between the cylinder and the plunger is small. Thus, the reciprocation of the plunger can be made smoother, and the pulsation pressure can be more effectively applied to the supplied water flow.

  What is necessary is just to form a bypass path so that the gravity center position of the radial cross section of a plunger may correspond with the center position of the cross section of the radial direction of a cylinder.

  If the center of gravity of the plunger cross section in the radial direction coincides with the center position of the cylinder cross section in the radial direction, the plunger can be prevented from being displaced in the radial direction of the cylinder. Can be made more smooth. Thereby, the pulsation pressure can be more effectively applied to the supplied water flow, and the inner wall of the cylinder can be prevented from being damaged due to the reciprocating motion of the plunger, thereby improving the durability.

  The electromagnetic pump may further include a magnetic head that is provided on the downstream side in the cylinder and is magnetized by the action of the electromagnetic coil to attract the plunger. This magnetic head has a through hole that forms a passage for the water flow supplied to the center of the diameter, and when the plunger is attracted, the magnetic head and the plunger come close to each other, and a bypass path provided on the outer periphery of the plunger is provided. It is configured to narrow the passage of the flowing water flow.

  By providing the magnetic head, the plunger can effectively receive the magnetic force generated by the action of the electromagnetic coil, and it is not necessary to increase the number of coil turns of the electromagnetic coil or to flow a large amount of current. Therefore, it is not necessary to increase the number of coil turns, and the power consumption can be reduced.

  Further, the configuration of the magnetic head makes it difficult for the water flow in the discharge portion to be pushed back to the supply portion side, and increases the force for pushing the water flow to the discharge portion side, thereby increasing the maximum discharge pressure of pulsating water in the discharge portion. it can.

  Also, when the plunger returns to its original position by the spring energized by stopping energization of the electromagnetic coil, a narrowed water flow passage that flows through the bypass passage becomes wider, so the water flow is pushed back to the suction side. As the force increases, the minimum discharge pressure of pulsating water in the discharge section can be reduced.

  According to the pulsating water discharge device, the pulsating water is ejected vigorously from the pulsating water discharge port to form a pulsating water flow of large and small polka dots, causing a clear impact due to pulsation even with a small amount of water, for example when used for washing The cleaning effect of the electromagnetic pump can be enhanced, the check valve that was one of the causes of failure can be eliminated, the cause of failure of the electromagnetic pump can be reduced, and the durability can be increased.

  In addition, when the bypass path is formed by providing a groove-like notch on the outer periphery of the plunger, the ability of the electromagnetic coil can be fully exerted, and the sliding resistance with the plunger can be reduced. Can be easily formed with high accuracy, and the pulsating water discharge device can be configured at low cost and with low power consumption.

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 a pulsating water discharge apparatus according to Embodiment 1 of the present invention. FIG. 2 shows a pulsation generating electromagnetic pump provided in the pulsating water discharge device. 3 and 4 show the electromagnetic pump. FIG. 5 shows another form of bypass path of the electromagnetic pump.

  In FIG. 1, a pulsating water discharge device 1 (hereinafter referred to as a discharge device) is connected to an electromagnetic valve 3 connected in the middle of a tap water supply pipe 2 via a water supply pipe 2 on the downstream side of the electromagnetic valve 3. A pulsation generating electromagnetic pump 4 (hereinafter referred to as an electromagnetic pump), a cleaning nozzle 5 (pulsating water discharge port) attached to a discharge port of the electromagnetic pump 4, and a control unit 6.

  The control unit 6 includes a switch 6a. When the switch 6a is pressed, the control unit 6 opens the electromagnetic valve 3, and periodically supplies a pulse voltage of a predetermined pattern to the electromagnetic pump 4. The control unit includes a radio signal receiver 6b. When the radio signal indicating that the switch 6d is pressed from the wireless remote controller 6c is received by the receiver 6b, the electromagnetic valve 3 is opened, and the electromagnetic pump 4 is connected to the electromagnetic pump 4. Supply power. When the switch 6a is pressed again, or when the receiver 6b receives again a radio signal transmitted from the wireless remote controller 6c in response to pressing of the switch 6d, the control unit 6 closes the electromagnetic valve 3 and supplies power. Stop.

  The electromagnetic pump 4 operates in response to the application of the pulse voltage, and discharges pulsating water by adjusting the pulsating pressure to tap water supplied at a uniform pressure. The pulsating water discharged from the electromagnetic pump 4 is ejected vigorously from the discharge port of the cleaning nozzle 5.

  2 to 4, the electromagnetic pump 4 includes, in order from the upstream side, a feeding unit 7 with an accumulator function that guides the supplied water forming the feeding unit to the inside of the electromagnetic pump 4, and a feeding unit that operates by a pulse voltage. And a piston portion 8 that pulsates and discharges water supplied from the water 7. Further, the electromagnetic pump 4 supplies the pulsating water discharged from the piston portion 8 to the external cleaning nozzle 5 and supplies the piston portion 8 as indicated by arrows 20 and 21 indicated by solid lines in the figure. And a fastener 10 that is sandwiched and fixed between the insertion portion 7 and the discharge portion 9.

  The feeding portion 7 has a predetermined length in which both ends openings 7f and 7g are connected to a water supply port 7a, a discharge port 7c communicating with the water supply port 7a through a passage 7b, and branch pipes 7d and 7e extending from the passage 7b. And an elastic tube 7h. The elastic tube 7h 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 with high accuracy. Compared to this, the elastic tube 7h 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 piston portion 8 includes an electromagnetic coil 8b fixed to the fastener 8a, and a tubular cylinder 8c in which the electromagnetic coil 8b is provided on the outer periphery and in which water supplied from the discharge port 7c of the feeding portion 7 flows. In the cylinder 8c, a magnetic head 8d provided on the downstream side thereof and provided with a through hole 8j that forms a passage of water flow supplied to the central portion of the diameter magnetized by the action of the electromagnetic coil 8b, a plunger 8e, It has.

  The plunger 8e is biased so as to be moved to the return position by two springs 8f and 8g. On both sides of the cylinder 8c, rubber seals 8h and 8i used when the cylinder 8c is sandwiched and fixed between the feeding portion 7 and the discharge portion 9 are provided.

  The spring 8f is in contact with the discharge port 7c of the feeding portion 7 on the upstream side and abuts on the plunger 8e on the downstream side, and acts to push it downstream. The spring 8g passes through a through-hole 8j provided in the magnetic head 8d in a telescopic manner, and the upstream side abuts on the plunger 8e, the downstream side abuts on the discharge portion 9, and pushes the plunger 8e upstream. Works. By the action of the springs 8f and 8g, the plunger 8e is urged so as to always return to the return position.

  The plunger 8e is located upstream of the cylinder 8c, and is held by the force of pushing back the spring 8g just before being attracted to the magnetized magnetic head 8d when the electromagnetic coil 8b is energized and brought into contact with the magnetic head 8d. P1) and a predetermined return position (P2) returned by the action of the springs 8f and 8g when the energization of the electromagnetic coil 8b is stopped are provided so as to freely reciprocate (interval L1).

  The plunger 8e has a groove shape (for example, a U-groove shape) that is chamfered on the outer periphery thereof so that an edge is not formed so that the downstream side and the upstream side of the passage in the cylinder 8c communicate with each other. A notch bypass path 8k is provided.

  This bypass path 8k is located downstream of the cylinder when the plunger 8e moves to the discharge position (P1) in response to the supply of pulse voltage from the control unit 6 when the electromagnetic valve 3 is open and water is supplied from the water supply pipe 2. When the maximum value of the discharge pressure for moving water to the side is equal to or higher than the pressure of the water flow to be supplied, the supply of the pulse voltage from the control unit 6 is stopped and the discharge pressure when the plunger 8e returns to the return position (P2). The minimum value is set to be lower than the pressure of the water flow to be supplied. Thereby, large and small polka dots of pulsating water can be discharged from the cleaning nozzle by the pulsating pressure of the electromagnetic pump 4.

  The discharge section 9 includes a water supply port 9a having substantially the same diameter as the through hole 8j of the magnetic head 8d, a discharge port 9b communicating with the water supply port 9a, and a seal 9c used when the cleaning nozzle 5 is attached. .

  In the electromagnetic pump 4 incorporated in the discharge device 1 having the above-described configuration, the plunger 8e is not provided with a check valve that closes during discharge and opens when returning to the return position after discharge. When returning, the water flow flowing to the discharge unit 9 is not unnecessarily disturbed. As a result, clean large and small polka-dot pulsating water can be formed from the cleaning nozzle by the pulsating pressure by the electromagnetic pump 4. 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.

  That is, water is supplied by reciprocating movement of the plunger 8e because the bypass path 8k that connects the feeding portion 7 and the discharging portion 9 is provided between the cylinder 8c and the plunger 8e, not the check valve. The pulsating water to which the pulsating pressure is added to the water flow is ejected vigorously from the washing nozzle 5 to form a pulsating water flow of large and small polka dots, resulting in changes due to pulsation, improving the feeling of use and increasing the cleaning power Will be able to.

  Here, the pulsation pressure applied to the supplied water flow by the reciprocating motion of the plunger 8e will be described in detail. The electromagnetic coil 8b periodically feeds a pulse voltage of a predetermined pattern from the control unit 6, attracts the plunger 8e toward the discharge unit 9 with the magnetic force generated in the electromagnetic coil 8b when the power is fed, and stops feeding. When this is done, the plunger 8e is returned to its original position by the springs 8f and 8g. By repeating this, the plunger 8e reciprocates in the cylinder 8c.

  When the plunger 8e is attracted and moved to the discharge part 9 side by the magnetic force generated in the electromagnetic coil 8b by energizing the electromagnetic coil 8b, the supplied water flow is pushed out to the discharge part 9 side by the plunger 8e. The discharge pressure of the part 9 increases. Further, when the energization of the electromagnetic coil 8b is stopped and the plunger 8e returns to the original position by the springs 8f and 8g, the supplied water flow is pushed back to the feeding unit 7 side by the plunger 8e. The discharge pressure becomes low.

  Since the bypass path 8k is disposed here, the operation of increasing the discharge pressure of the discharge section 9 and the operation of decreasing the discharge pressure of the discharge section 9 cause pulsation in the water flow passing through the bypass path 8k. Pressure is added, and the maximum discharge pressure of the discharge part 9 is higher than the pressure of the water flow supplied from the water supply pipe, and the minimum discharge pressure of the discharge part 9 is lower than the pressure of the water flow supplied from the water supply pipe. Pulsating water is obtained.

  In the bypass path 8k, the maximum discharge pressure of the pulsating water of the discharge unit 9 is higher than the pressure of the water flow supplied from the water supply pipe 2, and the minimum discharge pressure of the pulsating water of the discharge part 9 is supplied from the water supply pipe 2. Since the pressure is set to be lower than the pressure of the water flow, a clear impact due to pulsation is produced even with a small amount of water, and the cleaning effect when used for cleaning, for example, can be enhanced.

  Here, since the plunger 8e is not hollow, the magnetic flux density is higher than that of the hollow plunger 8e, and the ability of the electromagnetic coil 8b for driving the plunger 8e reciprocating in the cylinder 8c can be sufficiently exhibited. In addition, it is not necessary to increase the number of coil turns or to pass a large amount of current, and it is not necessary to increase the number of coil turns, so that it is not necessary to increase the number of coil turns.

  Further, the U-groove notches constituting the bypass path 8k can be easily formed. For example, at the material stage of the round bar of the plunger 8e, the U-groove notches are continuously formed by drawing or cutting. With a simple configuration such as cutting to the length of the plunger 8e and finishing it, the processability can be greatly improved, and it can be produced at low cost.

  Moreover, since the contact area with the cylinder 8c to which the plunger 8e reciprocates becomes small, the sliding resistance between the cylinder 8c and the plunger 8e becomes small, and the reciprocation of the plunger 8e can be made smoother. Pulsating pressure can be more effectively applied to the supplied water flow.

  Further, since the chamfer 8l is provided so that no edge is formed at the end of the U-shaped groove in the bypass path 8k, damage can be prevented when the plunger 8e contacts the reciprocating cylinder 8c. The sliding resistance between the cylinder 8c and the plunger 8e becomes small, the reciprocating motion of the plunger 8e can be made smoother, and the pulsation pressure can be more effectively applied to the supplied water flow.

  In addition, a magnetic head 8d that is magnetized by the action of the electromagnetic coil 8b and attracts the plunger 8e is provided, and the magnetic head 8d is provided with a through-hole 8j that forms a passage of the water flow supplied to the center of the diameter. When 8e is sucked, the passage of the water flow through the bypass 8k formed in the plunger 8e is narrowed.

  Since the magnetic head 8d magnetized by the action of the electromagnetic coil 8b is disposed to attract the plunger 8e, the plunger 8e effectively receives the magnetic force generated by the action of the electromagnetic coil 8b. In addition, it is not necessary to increase the number of coil turns of the electromagnetic coil 8b or to pass a large amount of current, and it is not necessary to increase the number of coil turns, so that it is not necessary to increase the number of coil turns. be able to.

  Further, the magnetic head 8d is provided with a through hole 8j that forms a flow path of water supplied to the center of the diameter, and when the plunger 8e is sucked, a flow path of water flowing through the bypass path 8k provided in the plunger 8e. Therefore, it is difficult for the water flow in the discharge portion 9 to be pushed back to the feeding portion 7 side, and the force for pushing the water flow toward the discharge portion 9 is increased, so that the maximum discharge pressure of pulsating water in the discharge portion 9 is increased. Can be increased.

  In addition, when the plunger 8e returns to its original position by the springs 8f and 8g that are energized by stopping energization of the electromagnetic coil 8b, the water flow passage flowing through the bypass passage 8k provided in the plunger 8e is narrowed. Since it spreads, the force which pushes back a water flow to the supply part 7 side becomes high, and the minimum discharge pressure of the pulsating water of the discharge part 9 can be made small.

  Here, the higher the maximum value of the discharge pressure, the stronger the pulsation pressure generated by the electromagnetic pump 4, and the greater the difference between the maximum value and the minimum value of the discharge pressure, the greater the difference in strength. Therefore, it is considered that the detergency increases. If an attempt is made to obtain detergency with as little water as possible, the pressure of the supplied water flow will be reduced, and therefore the discharge pressure will be lower in proportion to the pressure of the supplied water flow. It is considered better to increase the maximum value of the pressure and at the same time increase the difference between the maximum value and the minimum value of the discharge pressure.

  For this reason, if the bypass area 8k disposed in the plunger 8e is too small, the passage of the water flow flowing through the bypass path 8k becomes narrow, the maximum value of the discharge pressure becomes low, and in extreme cases, the pressure loss occurs. As a result, the maximum value of the discharge pressure becomes lower than the pressure of the water flow supplied. In addition, when the passage area of the bypass passage 8k is too large, the effect of extruding or pushing back the supplied water flow is reduced, and the difference between the maximum value and the minimum value of the discharge pressure is reduced at the same time as the maximum value of the discharge pressure is reduced. End up.

  Therefore, according to the experiment, the passage area of the bypass groove 8k having the U-groove notch increases the maximum value of the discharge pressure in the range of 3 to 14% with respect to the cross-sectional area of the cylinder 8c, and at the same time, The difference between the minimum values can be increased, and the maximum effect can be obtained by setting the difference to approximately 5%.

The bypass path 8k disposed in the plunger 8e has been described as a U-groove cut, but this may be a U-shaped groove 8m as shown in FIG. 5 (a). A V-shaped groove 8n as shown in (b) may be used, or a D-cut shape 8o as shown in FIG. 5 (c) may be obtained, and the same effect can be obtained. It only has to be selected. In addition, the maximum discharge pressure of the pulsating water of the discharge unit 9 is higher than the pressure of the water flow supplied from the water supply pipe 2, and the minimum discharge pressure of the pulsating water of the discharge unit 9 is lower than the pressure of the supplied water flow. In this way, the configuration is arbitrary as long as it is in the range of the set passage area and shape.
(Embodiment 2)

  FIG. 6 shows an electromagnetic pump 4 according to Embodiment 2 of the present invention. FIG. 7 shows a plunger provided with another shape bypass path of the electromagnetic pump. In the present embodiment, only the plunger is different from that in the first embodiment, the same number is assigned, and only different portions will be described.

  The plunger 11 includes a bypass passage 11a having a plurality of grooves formed in a gear shape on the outer peripheral surface thereof. The plurality of grooves of the bypass passage 11a are formed by chamfering so that the center of gravity of the radial cross section of the plunger 11 coincides with the center position of the cross section of the cylinder 12 in the radial direction and no edge is generated. ing.

As described above, the plunger 11 is formed so that the gravity center position of the radial cross section thereof coincides with the center position of the radial cross section of the cylinder 12. The displacement can be prevented, the sliding contact area can be reduced, and the reciprocating motion of the plunger 11 can be made smoother. Therefore, pulsation pressure can be more effectively applied to the supplied water flow, damage to the inner wall of the cylinder 12 due to the reciprocating motion of the plunger 11 can be prevented, and durability can be improved.
Also, by providing a plurality of bypass passages 11a, the area per bypass passage 11a can be reduced, so that the processing becomes easier, the sliding resistance can be reduced, and the plunger 8e is reciprocated. The movement can be made smoother, and the pulsation pressure can be more effectively applied to the supplied water flow.

  Instead of the configuration of the bypass path 11a, a U-shaped groove 11b in which a plurality of grooves chamfered so as not to cause an edge as shown in FIG. As shown in FIG. 7B, it may be a V-shaped groove 11c arranged symmetrically, or may be a D-cut groove 11d as shown in FIG. 7C. What is necessary is just to select the groove shape of the bypass path 11a in consideration of material acquisition, workability, etc. Further, the maximum discharge pressure of the pulsating water in the discharge unit 9 is higher than the pressure of the water flow supplied from the water supply pipe 2, and the minimum discharge pressure of the pulsating water in the discharge part 9 is higher than the pressure of the water flow supplied from the water supply pipe 2. The configuration is arbitrary as long as the range of the passage area and the shape is set to be low.

  Moreover, although the electromagnetic pump 4 of the present invention has been described with reference to the feeding unit 7 with an accumulator function, this need not be particularly used. In addition, conventional electromagnetic pumps that have a nozzle-shaped rubber tube duckbill valve as a check valve, or electromagnetic pumps that have a through-hole and do not use a check valve, have a gap between the cylinder and the plunger. The maximum discharge pressure of the pulsating water in the discharge unit is higher than the pressure of the water flow supplied from the water supply pipe in combination with a configuration in which a bypass passage that communicates the supply unit and the discharge unit is provided. The minimum discharge pressure may be lower than the pressure of the water flow supplied from the water supply pipe. Such a case is also included in the scope of the present invention.

  As described above, the present invention can employ any configuration within a range in which the object of the invention can be achieved.

  The electromagnetic pump and the pulsating water discharge device of the present invention can be used for a toilet seat with a cleaning function. For example, a jet bath, a hand shower for washing hands, a bubble jet (registered trademark) type that brushes teeth by applying pulsating water to teeth. It can be used for a device in which a pulsating water flow is desired, such as a toothpaste device.

1 Pulsating water discharge device 2 Water supply pipe 4 Pulsation generating electromagnetic pump 5 Cleaning nozzle (Pulsating water discharge port)
6 Control part 7 Feeding part 8b Electromagnetic coil 8c, 12 Cylinder 8d Magnetic head 8e, 11 Plunger 8f, 8g Spring 8j Through hole 8k, 11a Bypass path 8l Chamfer 8m, 8n, 11b, 11c, 11d Groove (forms a bypass path) Groove cut)
9 Discharge part

Claims (3)

It is used by being attached between a water supply pipe that takes in a water flow and a pulsating water discharge outlet that discharges pulsating water, and is controlled by a controller that periodically supplies a pulse voltage of a predetermined pattern when water is supplied from the water supply pipe. In the electromagnetic pump for pulsation generation,
The electromagnetic pump for generating pulsation is
A feeding section connected to a water pipe and taking in a water flow;
An electromagnetic coil is provided on the outer periphery, and a tubular cylinder that circulates the water flow from the feeding portion inside,
A plunger located in the cylinder, supported by a spring for urging the front and rear, and reciprocally movable;
A discharge unit that discharges pulsating water in which pulsation pressure is added to the supplied water flow by reciprocation of the plunger;
A magnetic head for attracting the plunger magnetized by the action of an electromagnetic coil on the downstream side in the cylinder ;
The maximum discharge pressure of the pulsating water of the discharge unit is higher than the pressure of the water flow supplied from the water supply pipe, and the minimum discharge pressure of the pulsating water of the discharge part is lower than the pressure of the water flow supplied from the water supply pipe. As described above, a bypass path is provided between the cylinder and the plunger to communicate the feeding portion and the discharge portion, and no check valve is provided in the electromagnetic pump ,
The bypass path is formed by providing a groove-like cut in the outer periphery without providing a case for covering the outer periphery of the plunger.
The magnetic head has a through-hole serving as a passage for the supplied water flow at the center of the diameter, and when the plunger is attracted, the magnetic head and the plunger come close to each other and the bypass provided on the outer periphery of the plunger An electromagnetic pump for generating pulsation characterized by narrowing the passage of water flow through the passage .   2. The electromagnetic pump for generating pulsation according to claim 1, wherein the bypass passage is formed such that a gravity center position of a radial section of the plunger coincides with a center position of a radial section of the cylinder. Pulsating water discharge device using a pulsation generating electromagnetic pump according to claim 1 or 2.