JPH09112417A - Electromagnetic pump for sanitary-flushing closet seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase economical efficiency, prevent the leakage of liquid, and prevent the freezing of flushing water in the winter season by incorporating an accumulator integrally with a pump without manufacturing the accumulator separately, and thereby increasing the smoothing action and force accumulating action. SOLUTION: On the downstream end part of an electromagnetic pump which performs pumping operation in cooperation with the volume change due to the operation of the electromagnetic pump 21 fitted in so that it can freely slide and reciprocate, and both suction and discharge-check valves, an operating diaphragm 7 is arranged to receive direct dynamic pressure, and a cylindrical elastic body 6 having a cavity part 9 as an air cushion is provided behind the pressure receiving surface of the operating diaphragm. Between the collar part of the peripheral edge of the lower end of a cap 5 surrounding the cavity part and the elastic body, and the flange part of a discharge joint part 11, an accumulator 3 for closely holding the peripheral end part of the outer edge of the operating diaphragm 7, is arranged on the discharge side of the pump so that it is incorporated integrally with the pump.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic pump for pressure-feeding and injecting a cleaning liquid such as hot water used in a sanitary cleaning toilet seat device for cleaning a local part of a human body.

[0002]

2. Description of the Related Art Conventionally, in toilet bowls provided with the above-mentioned cleaning liquid jet pump, those using an electromagnetic pump have been the mainstream. Examples of this type of electromagnetic pump include Japanese Patent Publication No. 7-
There is a conventional technique disclosed in Japanese Patent No. 78387, and in addition to this, an accumulator is recently used to smooth the pulsation of the discharge pressure due to the reciprocating motion of the plunger of the pump. This prior art example will be described with reference to FIG. 4 which is a longitudinal explanatory view showing a partial cross section thereof.

The electromagnetic plunger 21 and the discharge plunger 22 are respectively fitted in a tube column 23 inserted in a longitudinal axial hole of an electromagnetic coil 27 of the electromagnetic pump 2 and a cylinder 24 erected at an upstream end portion thereof. And are articulated in tandem with each other and are pressure-supported between the auxiliary spring 25 and the return spring 26. Further, an annular magnetic pole 20 and an annular magnetic path 19 are fitted and provided at an upstream end and a downstream end between the longitudinal hole of the electromagnetic coil 27 and the tube column 23, respectively.

On the annular magnetic path 19 side and the annular magnetic pole 20 side of the electromagnetic coil 27, a discharge connector 11 'and an intake connector 30 are provided via the magnetic washers 16 and 17', respectively.
The outer frame yokes 18 'that surround the electromagnetic coil 27 are connected and arranged at both end portions of the
Although not shown, these are pinched and fixed together with the electromagnetic coil 27 by a method such as fastening with screws.

The suction joint body 30 includes a suction joint 32 having a suction port 31 and a suction valve 28. The discharge valve 29 is arranged between the discharge plunger 22 and the electromagnetic plunger 21 that is in contact with the discharge plunger 22. The suction valve 28 and the discharge valve 29 are check valves that open and close in the same direction. The discharge port 11 has a discharge port 1
The discharge joint 13 'having 2'is provided, and the accumulator 4 is screwed.

The accumulator 4 comprises a cylindrical elastic body 6'made of synthetic rubber or the like having a large number of honeycomb-shaped cavities 8'on a concentric circle, and a metal surrounding the cylindrical elastic body 6'and covering it. With a cap 5 '. The outer peripheral edge of a disk-shaped actuating diaphragm 7 ′ made of synthetic rubber or the like, which is disposed in contact with the bottom side of the honeycomb-shaped cavity 8 ′ of the cylindrical elastic body 6 ′, is the same as the collar portion of the accumulator body 33. The cap 5'is sandwiched between the caps 5'and the peripheral edge of the cap 5'is caulked to fix the cap 5'in an airtight manner.

The accumulator main body 33 has a through hole on its axial center and is fixed to the discharge joint 11 'by screwing it while keeping airtightness. Regarding the configuration and operation of the electromagnetic pump and accumulator, see Japanese Patent Publication No. 7-8838.
No. 7 and Jpn. Pat. Appln. KOKAI No. 53-3474 have detailed explanations thereof, so that the explanation is omitted here.

[0008] The accumulator is a 63-89495
As disclosed in FIG. 2 of Japanese Patent Laid-Open Publication No. JP-A-2003-242242, a system in which the end face of a plunger urged by a spring receives and absorbs the pulsation of a pump in the cylinder, and a working diaphragm is further provided on the end face of the plunger. However, if there is a liquid leak between the cylinder and the plunger and the back spring side is filled with liquid, the effect of the accumulator will be lost. To prevent this, leakage of the O-ring etc. to the circumference of the plunger Need preventive measures.

However, while the O-ring is worn due to the severe pulsation of the pump, the operation of the plunger is often impeded by the O-ring and the pulsation smoothing effect is impaired. Therefore, this type of accumulator is an electromagnetic pump of this type. Is rarely adopted by. As described above, in the electromagnetic pump with an accumulator according to the conventional technique, the accumulator is manufactured separately, and in order to attach it to the pump, an increase in the number of mounting parts and man-hours, an uneconomical need for a mounting space, etc. There is a high risk of liquid leakage or damage to the mounting part, for example, the screwed part. Moreover, there were many accidents such as breakage of accumulators and pumps due to freezing of wash water in winter, especially in severe cold regions.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to remedy the above-mentioned drawbacks of the prior art, and to integrate the accumulator integrally with the pump without separately manufacturing it, thereby reducing the size and cost and reducing the installation space. It is an object of the present invention to provide an electromagnetic pump for sanitary washing toilet seat devices, which has good durability and performance by achieving economical efficiency such as labor saving in mounting work, prevention of liquid leakage, and prevention of freezing of washing water in winter.

[0011]

In order to solve the above-mentioned problems, in the tube column inserted into the longitudinal hole of the electromagnetic coil, the pressure is provided between the auxiliary spring and the return spring, and The pump action is performed by the volume change caused by the operation of the electromagnetic plunger that is slidably and reciprocally fitted by the energization of the pulsed intermittent current to the coil, and the accompanying cooperative operation of the intake and discharge check valves. In the electromagnetic pump in which the fluid flowing from the suction port flows through the tube column and flows out from the discharge port, according to the present invention, the downstream end portion of the pump receives the direct impact dynamic pressure of the pulsating fluid from the front. The working diaphragm is arranged, a cylindrical elastic body having a cavity of the air cushion is provided behind the pressure receiving surface of the working diaphragm, and the flange portion of the lower end peripheral edge of the cap surrounding and covering these and the flange portion of the discharge joint body are provided. The outer edge of the working diaphragm between An accumulator comprising a peripheral edge portion sealingly clamping it is only necessary to built integrally disposed vital therewith the discharge side of the pump. In addition, the working diaphragm may be provided with a ring-shaped protrusion serving as a seal portion on the circumference of the outer edge portion thereof.

Further, it is possible to adopt a structure in which the outer circumferential edge of the working diaphragm is sandwiched and sealed between the cap and the auxiliary spring receiver.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail with reference to FIG. In FIG. 1, the fluid that has flowed in from the suction port 31 of the suction joint 32 of the electromagnetic pump 1 as shown by the arrow a flows from the suction valve 28 to the cylinder 24 and the discharge plunger 2.
2, a pump having a structure in which it flows longitudinally through the pipe column 23 through the discharge valve 29 and the electromagnetic plunger 21, and flows out from the discharge port 13 of the discharge joint 12 provided at the downstream end of this pump as shown by an arrow b. Has been done. The structure of this electromagnetic pump part is
4, which is the same as the prior art shown and described above, but the discharge joint 12 has at least three or more of them, with the lower end flange portion integral with the discharge joint 12 being sandwiched between the magnetic iron plate 16 and the outer frame yoke 18. The plurality of screws 15 are fixed by tightening, and the pump downstream end portion above the screw 15 is provided with a flange portion of the discharge joint body 11 made of synthetic resin or the like integrally molded with the discharge joint 12. .

An auxiliary spring receiver 34 is provided between the discharge joint 11 and the upper end of the auxiliary spring 25. Further, between the flange portion of the discharge connector 11 and the outer edge of the cap 5 made of synthetic resin or the like, there are at least three or more disc-shaped operating diaphragms 7 made of synthetic rubber or the like. It is clamped and fixed by tightening with the screw 14. A cylindrical elastic body 6 made of synthetic rubber or the like having an appropriate hardness is housed in the cap 5, and the cylindrical elastic body 6 is located at an upper portion substantially perpendicular to the axis of the discharge joint body 11. Honeycomb-shaped cavity with a bottom that opens like a honeycomb on the open end face of the
A plurality of concentric circles. The cap 5 surrounds and covers the cylindrical elastic body 6 such that its inner top surface is in close contact with the open end of the honeycomb-shaped cavity 8 of the cylindrical elastic body 6.

The cylindrical elastic body 6 which is in contact with the rear portion of the pressure receiving surface of the operating diaphragm 7 is provided with a hollow portion 9 which is to be an air cushion in the central portion while leaving the outer peripheral circumference thereof.
In addition, a ring-shaped projection 10 is provided at the sealing portion of the outer peripheral edge of the working diaphragm 7 which is the sandwiched portion to further secure the seal and prevent the abrasion of the sandwiched portion. . In this way, the accumulator 3 according to the present invention is constructed. Other parts shown in the figure and having the same reference numerals as those shown in FIG. 4 are the same parts as those in FIG. 4, and therefore their explanations are omitted.

During the pumping operation of the electromagnetic pump having such a structure, that is, when the electromagnetic plunger 21 and the discharge plunger 22 interlocked therewith reciprocate by the pulsed intermittent current to the electromagnetic coil 27 to discharge the pulsating fluid, the discharge is performed. The fluid ejected from the valve 29 receives the pulsating dynamic pressure perpendicularly to its discharge direction, that is, the resilience of the working diaphragm 7 which receives the direct impact dynamic pressure from the front and the cavity 9 behind the pressure receiving surface.
First, it is buffered by expanding and contracting and compressing and expanding and recovering the gas such as air, and then the working diaphragm 7 further compresses and restores the cylindrical elastic body 6 and the gas in the honeycomb-shaped cavity 8 to the original shape. .

That is, the operating diaphragm 7 primarily acts as an air cushion by the hollow portion 9 and secondarily as a buffering action by the cylindrical elastic body 6 to cause the discharge pulsation of the pump. It smoothes and increases its energy storage effect. The pulsation is smoothed by the accumulator 3, and the fluid, that is, the washing water is discharged from the discharge port 13 of the discharge joint 12 provided on the upstream side.

There is Pascal's principle that the pressure applied to a part of the sealed liquid in the pump is uniformly transmitted to each site in the liquid without changing its strength. However, like an electromagnetic pump, for example, when switching a commercial power source by half-wave rectification, at 50 Hz, 3000 times per minute, 60 Hz
Since it reciprocates 3600 times per minute, the pressure receiving surface of the accumulator is directly hit at the pressure receiving position in the flow path closest to the plunger of the source of the pressure of this pulsating flow and orthogonal to the pulsating impulse pressure flow. Since it is arranged at the same position as the cylinder head which receives a pulsating water hammer action, and the pulsating fluid flows out of the pump.
The state of pressure propagation is different from that of the prior art shown in FIG. 4 in which the pulsating impulse flow flows laterally of the pressure receiving surface, and the accumulator shown in FIG. 1 of the present invention is also effective. Are better.

The discharge flow rate and discharge pressure of the electromagnetic pump of the present invention shown in FIG. 1 and the electromagnetic pump of the prior art shown in FIG. 4 obtained by half-wave rectifying 50 Hz and 60 Hz of commercial power are 22 cc / sec at 50 Hz, that is, 1320 ml / min. , 1.2 kgf /
Table 1 shows the results at 60 Hz when adjusted to cm ² and the measured noise values for reference. An outline of this measuring device is shown in FIG.

In FIG. 3, 1 and 2 are electromagnetic pumps shown in FIGS. 1 and 4, 41 is a pressure gauge, and 42 is a nozzle diameter.
1.3 mm, 44 is a water tank, 45 is a microphone of a sound level meter, L is a distance between the electromagnetic pumps 1 and 2 and the microphone 45 horizontally of 1 meter, and h is from the electromagnetic pumps 1 and 2 to the water surface of the water tank 44. Inhalation head is 0.5 meters at a distance. Reference numeral 43 is a graduated cylinder or a flow meter, and the power supply current is a commercial AC 100V half-wave rectified.

[0021]

[Table 1]

As shown in Table 1, the electromagnetic pump shown in FIG. 1 with the built-in accumulator of the present invention has obtained better results than the prior art with the accumulator external shown in FIG. A half-wave rectified current of a commercial power source was used as the pulsed intermittent current for energizing the electromagnetic coil 27, but the phase of the pulsed intermittent current was further controlled, or the DC power source was changed into a pulsed state, and a conduction period during the frequency and / or cycle was used. That is, it is possible to control the discharge pressure of the pump by changing the duty ratio.

The electromagnetic pump according to the present invention shown in FIG. 1 has an electromagnetic plunger 21 and a discharge plunger 2 which is interlocked with the electromagnetic plunger 21.
2, but has a discharge plunger 22 and a cylinder 24.
Even if the electromagnetic plunger 21 is slidably reciprocated in the pipe column 23 which also serves as a cylinder and also serves as a discharge plunger, the pump action can be performed, and the effect of the present invention having an accumulator built therein can be sufficiently obtained.

Next, the electromagnetic pump of the present invention shown in FIG.
When the conventional electromagnetic pump shown in FIG. 4 is stopped,
That is, when the inside of each is left to stand for 24 hours at an ambient temperature of −15 ° C. while being filled with washing water, the water inside freezes and freezes and expands. 11 'was deformed and damaged, and the accumulator 4 was deformed and loosened in the caulked portion of the metal cap 5', resulting in leakage.

However, the electromagnetic pump with a built-in accumulator of the present invention shown in FIG. 1 did not cause any abnormality such as damage. The reason is that when the water in the pump freezes and expands, it compresses the air in the cavity 9 to fill it, and the air reservoirs of the cylindrical elastic body 6 and the honeycomb cavity 8 are also compressed,
Increased storage space for expanded ice and accept it,
This prevents damage to the pump and accumulator due to the freezing.

Further, the accumulator 3 according to the present invention in FIG. 1 has a cap 5 in comparison with the prior art of FIG. 4 in which the cap 5 ', etc. of the accumulator 4 is made of metal.
Also, since the discharge joint 11 can be made of a synthetic resin such as engineering plastic, its thermal conductivity is lower than that in the case of FIG. It is clear that it will occur.

Furthermore, in the accumulator 3 according to the present invention, there is no risk that the air inside will leak and diffuse into the liquid of the pump, but when and when the pressurized gas body is sealed inside, it is supplemented. If necessary, an inlet provided with a non-return valve at the top of the cap may be provided as shown in FIG. 6 of Japanese Utility Model Publication No. 53-3474. Next, another embodiment of the present invention will be described with reference to FIG. In the accumulator 3'integrated with the discharge joint 12 having the discharge port 13 at the discharge side downstream end of the electromagnetic pump 1 ', the cylindrical elastic body 6 has the honeycomb-shaped cavity 8 in the cap 5'. It is housed in close contact with the inner top part of the cap 5 ′, and the working diaphragm 7 at the lower end part of this cylindrical elastic body 6
A cavity 9 is provided between and, and the operating diaphragm 7 is provided with a ring-shaped projection as in the case of FIG.

The outer peripheral edge of the operating diaphragm 7 is clamped between the cap 5'and the peripheral edge of the auxiliary spring receiver 34 'by press-fitting and fixing the auxiliary spring receiver 34' in the inner cavity of the cap 5 '. As a result, the inside of the accumulator 3'is sealed. The auxiliary spring receiver 34 'may be screwed and fastened to the inner cavity of the cap 5', or the working diaphragm 7 may be pinched and fixed as described above by using an adhesive.

With respect to other configurations in FIG. 2, those having the same reference numerals as the components in FIGS. 1 and 4 are similar to these components.

[0030]

As described above, in the sanitary washing toilet seat device electromagnetic pump of the present invention, the pressure receiving surface of the working diaphragm of the accumulator is located and built in the cylinder cover shape of the top portion of the cylinder on the discharge side of the pump. In addition, since it is integrated, it is compact and saves space, and the man-hours for attaching a separate accumulator are also saved, which is economical because it saves material and labor.

The impact pressure of the pulsating fluid of the electromagnetic pump directly hits the pressure receiving surface of the working diaphragm from the front side, and by the air cushion due to the existence of the cavity between the working diaphragm and the cylindrical elastic body behind the working diaphragm, Next, the pressure of the pulsating fluid is buffered by the elastic force of the cylindrical elastic body and the cushioning action in the honeycomb-shaped cavity inside thereof, the smoothing action and the accumulating action are increased, the output of the pump is increased, and the noise is slightly reduced. it can.

Further, it is possible to provide a pump which is free from the risk of damage or leakage of the accumulator and the pump due to the freezing of the washing water in the pump when the pump is stopped at the ambient temperature of zero in the coldest winter. Further, the electromagnetic pump integrally incorporating the accumulator according to the present invention has reduced noise during operation as compared with the conventional pump. This means that the pulsation of the discharge fluid of the pump is further smoothed, and the vibration transmitted to the toilet seat to which this pump is attached is also low,
Therefore, this also reduces the noise during use, so it is preferable to reduce vibration noise where the user is disappointed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of essential parts of an embodiment of an electromagnetic pump for a sanitary washing toilet seat device of the present invention.

FIG. 2 is an enlarged view of a main part of another embodiment of the electromagnetic pump for sanitary washing toilet seat device of the present invention.

FIG. 3 is a schematic explanatory view of the discharge state and noise measuring device of the electromagnetic pump for sanitary washing toilet seat device of the present invention and the electromagnetic pump of the prior art.

FIG. 4 is a vertical cross-sectional explanatory view showing a partial cross section of the electromagnetic pump provided with a conventional accumulator.

[Explanation of symbols]

 1,1 'Electromagnetic pump 3,3' Accumulator 5,5 'Cap 6 Cylindrical elastic body 7 Working diaphragm 8 Honeycomb cavity 9 Cavity 10 Ring-shaped protrusion 11 Discharge joint 13 Discharge port 21 Electromagnetic plunger 23 Tube column 25 Auxiliary spring 26 Return spring 27 Electromagnetic coil 31 Suction port 34 'Auxiliary spring receiver

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F15B 1/02

Claims (3)

[Claims] 1. An electromagnetic coil slides in a tube column inserted into a longitudinal hole of the electromagnetic coil while being pressure-supported between an auxiliary spring and a return spring and applying a pulsed intermittent current to the electromagnetic coil. The volume change due to the operation of the electromagnetic plunger that is reciprocally fitted and the accompanying operation of the suction and discharge check valves together perform a pumping action, and the fluid flowing from the suction port flows inside the tube column. An electromagnetic pump that flows through and flows out from a discharge port, at the downstream end of the pump, an operating diaphragm is arranged so as to receive the direct impact dynamic pressure of the pulsating fluid from the front, and behind the pressure receiving surface of the operating diaphragm. A cylindrical elastic body having a hollow portion of an air cushion is provided, and an outer circumferential end portion of the working diaphragm is sandwiched between a flange portion of a lower end peripheral edge of a cap surrounding and covering them and a flange portion of a discharge joint body. Discharge the pump with a closed accumulator Electromagnetic pump for sanitary washing toilet seat apparatus which is characterized in that is built integrally disposed vital and this. 2. The electromagnetic pump for a sanitary washing toilet seat device according to claim 1, wherein the actuating diaphragm is provided with a ring-shaped protrusion serving as a seal portion on a circumference of an outer edge portion thereof. 3. The electromagnetic pump for sanitary washing toilet seat device according to claim 1, wherein an outer peripheral edge portion of the working diaphragm is sandwiched and sealed between the cap and the auxiliary spring receiver.