JP2003206561A - Bidet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the discharge flow from being influenced by the water supply pressure, to surely prevent the occurrence of water hammer and vibration, and to reduce the quantity of washing water in a bidet adapted to intermittently discharge water. <P>SOLUTION: This bidet includes a water feed means 1, a pressuring means 3 for periodically discharging variable pressures taking a higher pressure than the water supply pressure supplied from the water supply means 1 as a center value, and a discharge means 4 for discharging water pressurized and supplied by the pressure means 3 as washing water. The water supply means 1 has a pressure regulating part. The pressurizing means 3 is a reciprocating pump having a plurality of pump chambers, and the phases of piston operation in the respective pump chambers are shifted from each other. The pressure variable cycle of the pressurizing means 3 is a pressure fluctuation cycle recognized by the human body. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary washing device applied to, for example, a shower or a sanitary washing toilet seat.

[0002]

2. Description of the Related Art A conventional sanitary washing device is disclosed in, for example, Japanese Unexamined Patent Publication No.
The one described in Japanese Laid-Open Patent Publication No. 189317 was general. As shown in FIG. 11, this device employs an external gear pump as a pumping means for washing water, and a pair of gears 10
1, 102 mesh and each gear and housing 103
The cleaning water is pressure-fed through the gap. Gear 102
Although not shown, is fixed to the output shaft of the motor and rotates, and the gear 101 rotates as a subordinate gear of the gear 102. Then, the wash water that has been pressure-fed is such that the warm water that is always kept warm in the warm water tank 104 is extruded, and the warm water that has been pushed out is ejected from the washing nozzle 105.

[0003]

However, since this type of sanitary washing device uses a so-called hot water storage type heating means, which is usually provided with a hot water tank of about 1 to 1.5 L, it is possible to downsize the device. It is difficult, and even when not in use, hot water must be kept at a suitable temperature and kept at a constant temperature, resulting in large energy loss due to heat radiation and high running costs.

On the other hand, it is conceivable to use an instantaneous heat exchanger that boiles the wash water to an appropriate temperature only when it is used, but the upper limit of the outlet capacity of a general household is 15 A, and the power supplied from this is the maximum. However, in consideration of the severe winter season when the temperature of tap water drops to near 0 ℃, the flow rate of wash water required for washing is reduced to about 0.5 L per minute. There is a need.
The wash water flow rate of 0.5 L per minute is half or less of the amount of water compared with the general hot water storage type sanitary washing device described above.
The detergency and the perceived strength at the time of washing become insufficient.

Further, in order to solve the problem of the decrease in the amount of water, a system has been proposed in which an electromagnetic pump, an intermittent cutoff valve or the like is used to add pulsation to the water supply pressure from the water supply (for example, Japanese Patent Laid-Open No. 2001-90151). ). According to this, the flow rate of the wash water discharged is periodically increased and decreased, and the instantaneous flow rate of the discharge increases, so that the washing power and the feeling of washing are improved, and the amount of wash water itself can be reduced.
However, since it is configured to use the supply pressure from the water supply to change the pressure around this pressure, it is easily affected by the water supply pressure, and its capacity is particularly high in low water pressure areas (for example, the Okinawa region). Will be insufficient. Although countermeasures have been taken, it is unavoidable that a water hammer will occur in the waterway system because the water flow is intermittent under the influence of the water supply pressure, and functional parts connected to pipes and pipelines are unavoidable. However, there are problems such as damage and deterioration of the product, and generation of vibration and noise. Further, in the configuration using the electromagnetic pump or the intermittent electromagnetic valve described above, there is a problem that the pressure fluctuation width (amplitude) of the jet flow becomes too large, and as a result, the user feels pain during cleaning.

Therefore, an object of the present invention is to provide a sanitary washing device for intermittently discharging water, in which the discharge flow rate is not affected by the water supply pressure, and water hammer and vibration can be more reliably prevented.
And to reduce the amount of washing water.

[0007]

A sanitary washing device according to claim 1 is a water supply means and a pressurizing device that performs periodical variable pressure discharge centered on a pressure higher than the water supply pressure supplied from the water supply means. Means and discharge means for discharging the supply water pressurized and supplied by the pressurizing means as cleaning water.

According to the sanitary washing device of the first aspect, since the periodical variable pressure discharge centering at a pressure higher than the water supply pressure supplied from the water supply means is performed, the jet from the discharge means is a continuous flow. Since the pressure fluctuates in spite of this, it is possible to prevent excessive discontinuity of the discharged wash water, and it is possible to realize a wash with comfortable stimulation. Therefore, it is possible to alleviate the pain and discomfort caused by the intermittent feeling, and reduce the amount of washing water compared to the continuous flow.

The sanitary washing device according to a second aspect is the first aspect.
In the above, the pressurizing means is a reciprocating pump having a plurality of pump chambers, and the phase of the piston operation of each pump chamber is shifted.

According to the sanitary washing device of the second aspect, in addition to the same effects as the first aspect, noise due to vibration during pump operation can be reduced, durability of parts can be improved, and further washing on the washing surface due to vibration can be performed. It is possible to reduce the blurring of water and ensure the cleaning position.

The sanitary washing device according to claim 3 is the same as that according to claim 2.
In the above, the reciprocating pump is a double-acting type having pump chambers on both sides of the piston.

According to the sanitary washing device of the third aspect, in addition to the same effects as the second aspect, the structure is simplified, the size can be reduced, and the assembling can be facilitated.

According to a fourth aspect of the sanitary washing device of the present invention, in the first, second or third aspect, the water supply means has a pressure adjusting section.

According to the sanitary washing device of claim 4, in addition to the same effects as those of claim 1, claim 2 or claim 3,
Accurate pressure fluctuations can be given to the discharge of the wash water without being affected by pressure fluctuations on the high pressure side of the water supply pressure.

According to a fifth aspect of the sanitary washing device, in the first, second, third or fourth aspect, the pressure fluctuation cycle of the pressurizing means is a pressure fluctuation cycle recognizable by a human body. Is.

According to the sanitary washing device of claim 5, in addition to the same effects as in claim 1, claim 2, claim 3 or claim 4, for example, the pressure fluctuation cycle is 50 Hz to 1 Hz, preferably 50 Hz to 10 Hz. Then, it is possible to give a comfortable stimulus that can be clearly recognized by a person. When the pressure fluctuation cycle is higher than this, the feeling of irritation disappears and it becomes easier to feel that the washing water is being received in a continuous flow. Especially 5
0 Hz to 10 Hz gives the most comfortable stimulation.

According to a sixth aspect of the sanitary washing device, in the first, second, third, fourth or fifth aspect, a heating means for washing water is provided between the water supplying means and the pressurizing means. It is a thing.

According to the sanitary washing device of claim 6, claim 1, claim 2, claim 3, claim 4 or claim 5 is provided.
In addition to the same effect as above, pumps with sliding parts are usually composed of a combination of dissimilar materials, so the degree of expansion of the pump structure becomes constant by passing the wash water at a constant temperature, which ensures The pressure fluctuation cycle can be realized. Moreover, since a high pressure does not act on the heating means, the structure for preventing the temperature from becoming unstable due to the disturbance of the cleaning water, the structure for avoiding the deformation due to the heating means and the fatigue due to contraction / expansion, and more than necessary It is not necessary to consider the structure for achieving high pressure resistance. Further, since the heating means does not cause pulsation damping, it is possible to make the diameter of the pipe large.

A sanitary washing device according to a seventh aspect is provided with temperature detecting means for detecting the temperature of washing water according to the first, second, third, fourth, fifth or sixth aspect. After the temperature detecting means detects a predetermined temperature, the pressurizing means operates.

According to the sanitary washing device of claim 7, in addition to the same effects as those of claim 1, claim 2, claim 3, claim 4, claim 5 or claim 6, grease and seal members are also used. Since it starts operating after being softened, the load at the time of starting the pump is lightened, the motor can be made smaller, and the size can be reduced, and the power consumption can be reduced.

According to an eighth aspect of the sanitary washing device of the present invention, in the fourth, fifth, sixth or seventh aspect, the pressure adjusting portion is provided between the water supply means and the pressurizing means when the pressurizing means is in operation. The pressure of is less than 0.

According to the sanitary washing device of claim 8, in addition to the same effects as those of claim 4, claim 5, claim 6 or claim 7, there is no particular effect of the water pressure on the high pressure side. The flow rate can be controlled only by controlling the pressurizing means, and optimal control of washing water can be performed.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an overall view of the sanitary washing device. This sanitary washing device has a water supply means 1
The heating unit 2, the pressurizing unit 3, the discharging unit 4, and the control unit 5.

The water supply means 1 comprises a water supply pipe 6 connected to a water pipe, a water shutoff solenoid valve 7 for shutting down the flow and pressure of water downstream, and a flow rate of water flowing therethrough when the water supply pressure exceeds a predetermined value. Is a constant flow valve 8 for maintaining a constant value, and a relief water circuit 9 that branches off from the main waterway system connected to the heating means 2 and has its open end facing the inside of the toilet. The constant flow valve 8 and the escape water circuit 9 constitute a pressure adjusting unit. Further, a relief valve 10 is provided downstream of the pressurizing means 3 to be in an open state when a pressure higher than a predetermined value is applied. Since this is a configuration in which the pressurizing means 3 discharges at high pressure,
This is a safety measure for preventing disconnection of the connection hose and damage to the pipeline in the event that the pressurizing means 3 operates while the downstream side remains closed. Although the pressure adjusting unit is composed of the constant flow valve 8 and the relief water circuit 9 here, it is also possible to use a general constant pressure valve.

The pressurizing means 3 carries out periodic pressure fluctuations with a central value being a pressure higher than the water supply pressure supplied from the water supply means 1. The pressure fluctuation cycle of the pressurizing means 2 is a pressure fluctuation cycle that can be recognized by the human body, for example, 50 Hz to 1 Hz, preferably 50 Hz to 10 Hz. In other words, this pressure fluctuation cycle is determined by many parameters such as amplitude and acceleration, because the human body should not feel the vibration as it should be. Is usually limited to less than 1000 Hz, and most of the significant effects of vibration are 0.5 to 5
It is within the range of 0 Hz. Within this range the human body responds as a complex mass and elastic, damping system with many parameters. When the vibration is applied to the surface of the human body at 50 Hz or more, it is more appropriate to consider the human body as a viscoelastic body "(human-environmental system, human function data book). Even if it is applied to human skin, it is attenuated on the skin surface, and people do not feel vibration as vibration. The same applies to the intermittent stimulation of the cleaning jet, which can be considered as a kind of vibration. "Vibration below 1Hz is a special thing related to motion sickness" (Ergonomics standard, Numerical formula handbook)
As described above, 1 Hz or less cannot be said to be a comfortable frequency for humans. From these things, it can be said that the pressure fluctuation cycle that the human body can perceive is 50 to 1 Hz. As a result of the confirmation experiment, it was confirmed that 50 to 10 Hz gives the most comfortable stimulating sensation.

The structure of the pressurizing means 3 is shown in FIG. 2 described later. It should be noted that if a vibration damping rubber is interposed when installing the pressurizing means 3, it is possible to suppress vibration and abnormal noise of the pressurizing means 3 due to its vibration damping action. Further, the hardness of the discharge pipe of the pressurizing means 3 can be made higher than that of the upstream water supply pipeline, and the pulsation damping due to the expansion and contraction of the pipe by the pressurizing means 3 can be reduced. Further, noise can be prevented by fixing the discharge pipe or providing a dynamic vibration absorber at the resonance point.

The heating means 2 is provided between the water supply means 1 and the pressurizing means 2. The heating means 2 is of an instantaneous type without a hot water storage tank, and is constructed by connecting a heat exchanger having a heater built in to the upstream side of the relief valve 10. The heater used here is a ceramic heater having an excellent rate of temperature rise.

The discharging means 4 discharges the cleaning water pressurized and supplied by the pressing means 3. In the embodiment,
A water channel switching valve 11 in the form of, for example, a four-way valve, which is connected to the downstream side of the pressurizing means 3, and a buttocks cleaning nozzle 12, a bidet cleaning nozzle 13, and a nozzle which are respectively connected to the water channel switching valve 11 and switched from each other. It has a cleaning nozzle 14 for cleaning 12 and 13.

The temperature detecting means 15 detects the temperature of the washing water. After the temperature detecting means 15 detects a predetermined temperature, the pressurizing means 3 is controlled by the controller 5 so as to be driven. . In the embodiment, a hot water temperature thermistor is used on the downstream side of the heating means 2.

The control unit 5 controls the solenoid valve 7, the heating means 2, the temperature detecting means 15, the pressurizing means 3 and the water channel switching valve 11.

With the above structure, first, the control unit 5 opens the water passage communicating with the cleaning nozzle 14 of the water passage switching valve 11 and opens the solenoid valve 7 so that a large pressure does not act on the upstream side of the water passage switching valve 11. . It should be noted that this operation is not necessary when the water channel switching valve 11 stands by at the position communicating with the cleaning nozzle 14, and if the device is configured to stand by in this state, the water channel switching valve 11 should be operated by any chance. Even if a malfunction occurs, it is possible to prevent excessive pressure from acting on the water channel system, and in combination with the action of the relief valve 10, it is possible to further improve the reliability of the device. When the solenoid valve 7 is opened, tap water is supplied from the water supply pipe 6, but the escape water passage 9 discharges wash water to a toilet (not shown) in accordance with the water passage resistance. At this time, the flow rate of water flowing through the water supply pipe 6 is adjusted to a predetermined value by the action of the constant flow valve 8. It is suitable that the constant flow valve 8 is capable of adjusting the amount of water used for cleaning with some margin, but here, the amount of water used for cleaning is about 450 cc / min.
Then, for example, a water supply pressure of 50 kPa or more and a constant flow rate of approximately 500 cc per minute are used. By doing so, it is possible to prevent variations in performance even in a home with a high water supply pressure where a booster for pressurization is installed from an area where the water supply pressure is the lowest (for example, Okinawa area). Further, when the constant flow valve 8 has the above-mentioned performance, the supply water pressure supplied to the main waterway system connected to the heating means 2 is released and the flow rate of 500 cc per minute adjusted by the constant flow valve 8 flows into the waterway 9. The pressure loss at the time of the maximum is the maximum value, and the value is less than that. Here about 10 kPa
The water flow resistance of the escape channel system 9 is determined so as to act on the main channel system.

Next, the control section 5 starts energizing the heating means 2, and while taking in the temperature signal of the hot water detected by the temperature detecting means 15, adjusts the energization amount to change the heating means 2
Adjust the temperature of the hot water supplied from to a temperature suitable for washing the human body. The heat exchanger used here is a so-called instantaneous type mature exchanger capable of being heated to an appropriate temperature before the inflowing room temperature water flows out from the mature exchanger. Therefore, considering the shortening of the boiling time and the shortage of the boiling capacity in winter, it is desirable that the heater have as large a capacity as possible, but here it is possible to input 1200 W here due to the limitation of the outlet capacity of general households. Has been selected. If this instantaneous heat exchanger is used, there is no need to keep warm water warm when not in use, so a large reduction in power consumption can be expected, but the outlet capacity of general households is 15 A as mentioned above. Therefore, it cannot be denied that the amount of water that can be boiled up tends to be insufficient, especially during the severe winter months.

If it is not necessary to reduce the power consumption, the mature exchanger is constructed as a hot water tank of an appropriate size,
It is also possible to keep it at a suitable temperature and use it as needed. Further, in recent years, devices for 200V have begun to be introduced into the home, and if 200V is introduced into the field of the present invention,
Equipped with a larger capacity and overnight, it is easily conceivable to shorten the boiling time and improve the boiling capacity.

The wash water flows into the heating means 2 through the constant flow valve 8 and the like, and while absorbing the heat while flowing inside the heating means 2, the temperature rises, and after the temperature is detected on the outlet side of the heating means 2, the heating water is added. It is supplied to the pressure means 3. The pressurizing means 3 is operated when the temperature of the wash water heated by the heating means 2 reaches a predetermined temperature, increases the supply water pressure from the water supply means 1, and periodically adds pressure fluctuations. Here, the cleaning nozzle 14 which is kept in communication is ejected toward the posterior washing nozzle 12 and the bidet washing nozzle, and these are washed. After this nozzle cleaning operation, the posterior cleaning nozzle 12 or the bidet cleaning nozzle 1 whose switching is designated by the water channel switching valve 11 is performed.
Cleaning water is ejected from 3 to clean the portion to be cleaned of the human body.
When the pressurizing means 3 is not in operation, a water supply pressure of about 10 kPa from the water supplying means 1 acts on the upstream side to cause the wash water to flow in the pipeline. Since the means 3 also performs a suction operation for pressurizing and discharging the water supply pressure, the pressure in the conduit from the water supply means 1 to the pressurizing means 3 is 0 or less, that is, a negative pressure state. With this configuration, the discharge flow rate can be controlled only by controlling the pressurizing means 3, and the flow rate adjustment can be facilitated.

FIG. 2 shows the structure of the pressing means. The pressurizing means 3 is a reciprocating pump that has a plurality of pump chambers 15 and 16 and performs a piston motion, and has a configuration in which the phases of the piston operation of the pump chambers 15 and 16 are shifted. Each piston 17 provided in the pump chambers 15 and 16,
The pump chambers 15 and 16 are arranged so that the outer ends of the pump chambers 18 face each other, and a conversion mechanism 20 that converts rotational motion into reciprocating motion is disposed between the pump chambers 15 and 16. This conversion mechanism 2
Reference numeral 0 denotes a reduction gear 22 having a crankshaft 21, a pair of crank rods 23 and 24 having one end connected to the crankshaft 21 and the other end connected to pistons 17 and 18, the reduction gear 22.
It is composed of a motor 25 for rotating and driving When the motor 25 rotates and the crank shaft 21 of the reduction gear 22 rotates, the pistons 17 and 18 reciprocate due to the operation of the crank rods 23 and 24. In this case, since the crankshaft 21 is shared, the phase of the piston operation is shifted by about 180 degrees so that when one piston expands the pump chamber, the other piston compresses the pump chamber.

On the other hand, the pump chambers 15 and 16 are connected to the water inlet connection port 32 via check valves 27 and 28 using, for example, umbrella valves, and the discharge connection port 33 via check valves 29 and 28. Connected to. Therefore, the discharge connection port 33 is generated by the compression operation of the respective pump chambers 15 and 16.
Pressurized water is pressure-fed from, and hot water is sucked from the water inlet connection port 32 by the expansion operation. In this way, the cleaning water is periodically discharged from the discharge connection port 33 by the piston operation.

Reference numerals 35 and 36 are elastic seal members.

FIG. 3 shows the discharge pressure of each pump chamber 15, 16. Q1 is the fluctuation of the discharge pressure of the pump chamber 15, and Q2 is the fluctuation of the discharge pressure of the pump chamber 16. Each maximum pressure P1 is made larger than the water supply pressure P2, which is 180 degrees out of phase with each other. As a result, the resultant pressure fluctuation becomes as shown in FIG.

FIG. 4 shows the discharge fluctuating pressure of the cleaning water flowing out from the discharge port 33, and is a combination of both discharge pressures. This is the maximum pressure P1, and the minimum pressure P3 (= P1
/ 2), and both are designed to be higher than the water supply pressure. Further, the discharge pressure fluctuation center P0 = (P1-P3) / 2
Is higher than the water supply pressure P2. Therefore, the cleaning water ejected from the cleaning nozzle is not discharged intermittently but is accompanied by continuous and periodic pressure fluctuations.

Therefore, it is possible to reduce the intermittent feeling of the wash water to be discharged, and it is possible to realize the wash in which a comfortable stimulus is obtained. Further, as compared with the conventional example, the pressure on the upstream side of the pressurizing means 3 is low, and the flow is not interrupted even during the suction operation, so that water hammer, vibration, etc. are alleviated more reliably, and the It is possible to improve the reliability of the resin part, reduce the pain and discomfort due to the intermittent feeling, and reduce the amount of washing water compared to the continuous flow.

The second embodiment of the present invention is shown in FIG. This is another form of the pressing means of the first embodiment. That is, the reciprocating pump is a double-acting type having pump chambers on both sides of the piston. In the embodiment, a piston rod 36 is fixedly installed on the piston 55, and the motor 25 and the reduction gear 2 shown in the first embodiment are fixed.
It is configured to be reciprocally moved by a driving means composed of 2 and a crank rod 23 and the like. This piston 55 is provided with a ring-shaped groove 56, and a special packing called an X ring 59 made of nitrile rubber is attached to this ring. The X-ring 59 is a ring-shaped sealing member similar to the O-ring and ∨ packing, and its cut cross section is substantially X-shaped as shown in FIG.

Further, the cylinder portion 40 is provided with a suction port 60, a discharge port 61, a suction port 62, and a discharge port 63 in a positional relationship as shown in FIG.
30 are integrally provided in the directions shown in the drawing. And
The suction ports 60, 62 are connected to the water inlet 3 via the check valves 27, 29.
2, the discharge ports 61 and 63 communicate with the discharge connection port 33, the water inlet connection port 32 is connected to the heating means, and the discharge connection port 33 is connected to the water channel switching valve 11. Furthermore, the piston rod 36 and the cylinder portion 40 are sealed by a ∨ packing 67. Therefore, a pump chamber 65 that is a first pump chamber and a pump chamber 66 that is a second pump chamber are formed on both left and right sides of the piston 55 in the drawing.

Next, the operation and action will be described. First, when the piston 55 moves downward in the figure, the volume of the pump chamber 65 increases with the movement thereof, so that the cleaning water supplied from the heating means 2 is sucked from the suction port 60. At this time, the check valve 29 provided in the suction port 60 is in the open state, but the check valve 30 provided in the discharge port 61 is in the closed state.

At the same time, the volume of the pump chamber 66 decreases as the piston 55 moves, so that the cleaning water filling the pump chamber 66 is discharged from the discharge port 63. At this time, the check valve 27 provided in the suction port 62 is in the closed state, and the check valve 28 provided in the discharge port 63 is in the open state.

On the contrary, when the piston 55 moves upward in the figure, the operations of the pump chambers 65 and 66 are reversed, and the wash water is discharged from the pump chamber 65 through the discharge port 61, and the pump is reversed. The chamber 66 sucks the cleaning water through the suction port 62.

At this time, the X ring 59 is in the pump chamber 65.
The pump chamber 66 is pressure-divided to form a seal line with a small contact area with a small lip portion as in the case of the ∨ packing described above. Therefore, not only the reliability is improved, but also the piston 55 can be reciprocated with a small force, and the device can be downsized.
Cost reduction can be achieved. Further, since the X-ring 59 has a structure in which the adhesiveness is further increased when the pressure is increased in both the forward and backward directions, it is not necessary to use two ∨ packings, and the cost of the device can be reduced. Furthermore, since the concave portion of the X-ring cross section plays a role of a grease reservoir, the grease can be prevented from flowing out even when it is operated for a long time, and the durability of the device is improved.

Also, the ∨ packing 67 for sealing the piston rod 36 and the cylinder portion 29 can surely create a sealed state with a small contact area like the X ring 59, and a highly reliable device without external leakage can be provided. realizable. It goes without saying that the driving force can be reduced.

Further, with such a structure, the driving force is balanced when the piston 55 moves forward and backward, so that the vibration generated in the pressurizing means 2 can be extremely suppressed and the noise can be reduced. The effect that it can be achieved is also obtained. Furthermore, compared with the case where there is only one pump chamber, the flow rate of wash water that can be discharged when the piston 55 reciprocates once is about twice, so the number of rotations of the motor 25 can be halved. Not only the quietness is secured, but also the durability of the pressurizing means 2 is improved. The load on the pump chambers for each pump can be halved.

Further, if the intermittent cycle of the cleaning water intermittently discharged is too slow, the user may feel uncomfortable. However, a plurality of pump chambers are provided in this way, and more pump chambers are provided. By varying the phases of suction and discharge operations, the feeling of intermittentness is alleviated, and comfortable human body cleaning can be realized.

A third embodiment of the present invention is shown in FIGS. 6 to 9. That is, in FIG. 6, the difference from the first embodiment is that the first pressurizing means 3 are connected in series with each other.
It is composed of the pressurizing means 3a and the second pressurizing means 3b.

FIG. 7 shows a gear pump which is an example of the first pressurizing means 3a. 80 is a housing, 81 is a first gear, 82 is a second gear that meshes with the first gear 81, 83
Is a motor for driving the first gear 81. Motor 83
Is rotated, the first gear 81 rotates in the direction of the arrow, and the second gear 82 is driven to rotate in the opposite direction accordingly.
Therefore, the second pressurizing unit 3 is sucked from the suction port 84 of the housing 80 connected to the heating unit 2 and is discharged from the discharge port 85.
Pump to b with constant pressure.

The first pressurizing means 3a is a centrifugal pump,
A pump that continuously pressurizes a constant pressure, such as an axial flow pump or a vortex flow pump, may be used.

FIG. 8 shows a single-acting reciprocating pump which is an example of the second pressurizing means 3b. This pump is composed of the pump chamber 16 on one side of FIG. 2 and the conversion mechanism 20, and the same parts are designated by the same reference numerals. Therefore, the motor 25
When the piston rotates, the piston 18 reciprocates via the conversion mechanism 20, the pump chamber 16 expands and contracts, and at the time of expansion, washing water flows from the suction connection port 32 into the pump chamber 16 via the check valve 27. Discharge connection port 3 via check valve 29 during contraction
3 is intermittently discharged.

FIG. 9A shows the discharge pressure P1 of the first pressurizing means 3a, which is a constant pressure higher than the water supply pressure. FIG. 9B shows the discharge pressure of the second pressurizing means 3b, and the discharge pressure fluctuates intermittently as the piston 18 reciprocates. The figure shows the vibration around the water supply pressure. Figure 9
(C) is a composite of both discharge pressures and shows a pulsation around the discharge pressure P1 of the first pressurizing means 3a.

The second pressurizing means 3b may be a diaphragm pump or an electromagnetic pump, which is generally called a reciprocating pump.

A fourth embodiment of the present invention will be described with reference to FIG. In the above-described first and third embodiments, the pressure adjusting unit 8 sets the pressure between the water supply means 1 and the pressurizing means 3 to 0 or less when the pressurizing means 3 is in operation.

FIG. 10A shows the supply pressure adjusted by the pressure adjusting unit 8. This is because when the pressurizing means 3 is not activated, the pressure adjusting unit 8 adjusts the supply pressure of the wash water to Ps (when the solenoid valve is open), so that some wash water flows in the water channel, and this water pressure is The pressure means 3 is applied.

FIG. 10D shows the time range of the pump operation. FIG. 10B shows the upstream pump suction pressure Pp during the pump operation. Where Ps ≦ | P
p | FIG. 10C shows the resulting pressure between the water supply means 1 and the pressurization means 3. That is, during the pump operation, the pressure between the water supply means 1 and the pressurization means 3 is 0.
It is below. Therefore, during the pump operation, the upstream side is always 0 or negative pressure, so that even if the water pressure changes, the discharge side of the pressurizing means is not affected.

[0059]

According to the sanitary washing device of claim 1,
Since the jet pressure from the discharge means is continuous, the pressure fluctuates because of the periodical variable pressure discharge centered on a pressure higher than the water supply pressure supplied from the water supply means. It is possible to prevent discontinuity, and to realize cleaning that provides comfortable stimulation. Therefore, it is possible to alleviate the pain and discomfort caused by the intermittent feeling, and reduce the amount of washing water compared to the continuous flow.

According to the sanitary washing device of the second aspect, in addition to the same effects as in the first aspect, noise due to vibration during pump operation can be reduced, durability of parts can be improved, and further washing on the washing surface due to vibration can be performed. It is possible to reduce the blurring of water and ensure the cleaning position.

According to the sanitary washing device of the third aspect, in addition to the same effects as the second aspect, the structure is simplified, the size can be reduced, and the assembling can be facilitated.

According to the sanitary washing device of claim 4, in addition to the same effects as those of claim 1, claim 2 or claim 3,
Accurate pressure fluctuations can be given to the discharge of the wash water without being affected by pressure fluctuations on the high pressure side of the water supply pressure.

According to the sanitary washing device of claim 5, in addition to the same effects as in claim 1, claim 2, claim 3, or claim 4, for example, the pressure fluctuation cycle is 50 Hz to 1 Hz, preferably 50 Hz to 10 Hz. Then, it is possible to give a comfortable stimulus that can be clearly recognized by a person. When the pressure fluctuation cycle is higher than this, the feeling of irritation disappears and it becomes easier to feel that the washing water is being received in a continuous flow. Especially 5
0 Hz to 10 Hz gives the most comfortable stimulation.

According to the sanitary washing device of claim 6, claim 1, claim 2, claim 3, claim 4 or claim 5 is provided.
In addition to the same effect as above, pumps with sliding parts are usually composed of a combination of dissimilar materials, so the degree of expansion of the pump structure becomes constant by passing the wash water at a constant temperature, which ensures The pressure fluctuation cycle can be realized. Moreover, since a high pressure does not act on the heating means, the structure for preventing the temperature from becoming unstable due to the disturbance of the cleaning water, the structure for avoiding the deformation due to the heating means and the fatigue due to contraction / expansion, and more than necessary It is not necessary to consider the structure for achieving high pressure resistance. Further, since the heating means does not cause pulsation damping, it is possible to make the diameter of the pipe large.

According to the sanitary washing device of claim 7, in addition to the same effects as those of claim 1, claim 2, claim 3, claim 4, claim 5 or claim 6, grease and sealing members Since it starts operating after being softened, the load at the time of starting the pump is lightened, the motor can be made smaller, and the size can be reduced, and the power consumption can be reduced.

According to the sanitary washing device of claim 8, in addition to the same effects as those of claim 4, claim 5, claim 6 or claim 7, there is no particular effect of the water pressure on the high pressure side. The flow rate can be controlled only by controlling the pressurizing means, and optimal control of washing water can be performed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a first embodiment of the present invention.

FIG. 2 is a sectional view of the pressurizing means.

FIG. 3 is a fluctuation waveform diagram of the discharge pressure of each pump chamber of the pressurizing means.

FIG. 4 is a fluctuation waveform diagram of the discharge pressure by the pressurizing means.

FIG. 5 is a sectional view of a pressurizing unit according to a second embodiment.

FIG. 6 is an overall configuration diagram of a third embodiment.

FIG. 7 is a cross-sectional view of the first pressurizing means.

FIG. 8 is a sectional view of a second pressurizing unit.

FIG. 9 is a graph of discharge pressure and combined discharge pressure of each pressurizing unit.

FIG. 10 is an explanatory view when the upstream side has a negative pressure during operation of the pressurizing means.

FIG. 11 is a configuration diagram of a conventional example.

FIG. 12 is a cross-sectional view of another conventional pressure feeding means.

[Explanation of symbols]

1 Water supply means 2 heating means 3 Pressurizing means 4 discharging means 5 control unit 8 Pressure adjustment section 15 pump room 16 pump room 65 pump room 66 Pump room

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tomohide Matsumoto             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Norio Toge             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 2D038 JA01 JB05 JF00 JH11

Claims (8)

[Claims] 1. A water supply means, a pressurizing means for performing periodical variable pressure discharge centered at a pressure higher than the water supply pressure supplied from the water supply means, and the water is pressurized and supplied by the pressurizing means. A sanitary washing device having a discharge means for discharging the supplied water as cleaning water. 2. The sanitary washing device according to claim 1, wherein the pressurizing means is a reciprocating pump having a plurality of pump chambers, and the phases of the piston motions of the respective pump chambers are shifted. 3. The sanitary washing device according to claim 2, wherein the reciprocating pump is a double-acting type having pump chambers on both sides of the piston. 4. The sanitary washing device according to claim 1, 2, or 3, wherein the water supply means has a pressure adjusting portion. 5. The sanitary washing device according to claim 1, claim 2, claim 3, or claim 4, wherein the pressure fluctuation cycle of the pressurizing means is a pressure fluctuation cycle that can be recognized by a human body. 6. The washing water heating means is provided between the water supply means and the pressurizing means, claim 1, claim 2, claim 3, and claim 4.
Alternatively, the sanitary washing device according to claim 5. 7. The method according to claim 1, wherein the pressurizing means operates after the temperature detecting means for detecting the temperature of the washing water is detected, and the temperature detecting means detects a predetermined temperature. The sanitary washing device according to claim 4, claim 5, or claim 6. 8. The hygiene according to claim 4, 5, 6 or 7, wherein the pressure adjusting unit sets the pressure between the water supply means and the pressurizing means to 0 or less when the pressurizing means is in operation. Cleaning device.