JP4183944B2 - Sanitary washing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a sanitary washing apparatus applied to, for example, a shower or a sanitary washing toilet seat.
[0002]
[Prior art]
  A conventional sanitary washing apparatus is generally one described in, for example, Japanese Patent Application Laid-Open No. 07-189317. As shown in FIG. 11, this apparatus employs an external gear pump as the cleaning water pumping means, and pressurizes and sends the cleaning water through the engagement between the pair of gears 101 and 102 and the gap between each gear and the housing 103. Although not shown, the gear 102 is fixed to the output shaft of the motor and rotates, and the gear 101 rotates as a subordinate gear of the gear 102. The pumped wash water extrudes warm water that is always kept warm in the hot water tank 104, and the hot water pushed out from the wash nozzle 105 is ejected.
[0003]
[Problems to be solved by the invention]
  However, this type of sanitary washing device usually uses a so-called hot water storage type heating means equipped with a hot water tank of about 1 to 1.5 L, so it is difficult to reduce the size of the device, and even when not in use. Since hot water must be kept warm at an appropriate temperature at all times, energy loss due to heat dissipation is large and running costs are high.
[0004]
  On the other hand, it is conceivable to use an instantaneous heat exchanger that boils the washing water to an appropriate temperature only during use, but the upper limit of the outlet capacity of a general household is 15A, and the power supplied from this is sufficient. Considering the severe winter season when the boiling water temperature cannot be obtained and the temperature of tap water drops to near 0 ° C, there is a need to reduce the flow rate of cleaning water required for cleaning to about 0.5L per minute. is there. The washing water flow rate of 0.5 L / min is less than half the amount of water compared to the above-mentioned general hot water storage type sanitary washing device, and the washing power and the sensory strength during washing are insufficient. End up.
[0005]
  Furthermore, in order to solve the problem of water volume reduction, a method of adding pulsation to the water supply pressure from the water supply by using an electromagnetic pump, an intermittent shutoff valve, or the like has been proposed (for example,Japanese Patent Laid-Open No. 2001-90151). According to this, the flow rate of the discharged cleaning water repeatedly increases and decreases periodically, and the instantaneous discharge flow rate increases, so that the cleaning power and the feeling of cleaning are improved, and the cleaning water amount itself can be reduced. However, since the supply pressure from the water supply is used to change the pressure around this pressure, it is easily affected by the water supply pressure, especially in low water pressure areas (such as the Okinawa area). Will be insufficient. In addition, although measures have been taken, functional parts connected to pipes and pipes cannot be denied that water hammer will occur in the waterway system in order to make the water flow intermittent with the water supply pressure applied. There were problems such as causing damage and deterioration of the product and leading to generation of vibration and abnormal noise. Further, in the configuration using the above-described electromagnetic pump and intermittent electromagnetic valve, 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.
[0006]
  Accordingly, an object of the present invention is to provide a sanitary washing apparatus that intermittently discharges water, and the discharge flow rate is not affected by the water supply pressure, so that water hammer and vibration can be prevented more reliably and the amount of washing water can be reduced. is there.
[0007]
[Means for Solving the Problems]
  The sanitary washing device according to claim 1 has a water supply means and a pressure higher than a water supply pressure supplied from the water supply means.minimum valueAnd a discharge means for discharging the supply water pressurized and supplied by the pressurization means as cleaning water.
[0008]
  According to the sanitary washing device according to claim 1, since the periodic fluctuating pressure discharge is performed with the pressure higher than the water supply pressure supplied from the water supply means being the minimum value, the jet flow from the discharge means is a continuous flow while the pressure is constant. Therefore, it is possible to prevent an excessive intermittent feeling of the discharged cleaning water, and it is possible to realize cleaning that provides a comfortable stimulus. Therefore, the pain and discomfort due to the intermittent feeling can be alleviated, and the amount of washing water can be reduced as compared with the continuous flow.
  The sanitary washing device according to claim 2 has a pressure higher than the water supply pressure supplied from the water supply means by combining the water supply means and a plurality of pressure discharges.minimum valueAnd a discharge means for discharging the supply water pressurized and supplied by the pressurization means as cleaning water.
  According to the sanitary washing device of the second aspect, the pressurizing means generates a pressure higher than the water supply pressure supplied from the water supply means by combining a plurality of pressure discharges.minimum valueTherefore, it is possible to prevent an excessive intermittent feeling of the discharged cleaning water and to achieve cleaning with a comfortable stimulus. Therefore, the pain and discomfort due to the intermittent feeling can be alleviated, and the amount of washing water can be reduced as compared with the continuous flow.
[0009]
  Claim3The sanitary washing device according to claim 1Or claim 2The pressurizing means is a reciprocating pump having a plurality of pump chambers, and the piston operation phases of the pump chambers are shifted from each other.
[0010]
  Claim3According to the described sanitary washing device, claim 1Or claim 2In addition to the same effect as above, noise due to vibrations during pump operation can be reduced, the durability of parts can be improved, and the washing water can be prevented from shaking on the washing surface due to vibrations, and the washing position can be secured. .
[0011]
  Claim4The sanitary washing device according to claim3The reciprocating pump is a double-acting type having pump chambers on both sides of the piston.
[0012]
  Claim4According to the described sanitary washing device, the claim3In addition to the same effects as the above, the configuration is simplified, and the size can be reduced and the assembly is facilitated.
[0013]
  Claim5The sanitary washing device according to claim 1Any one of Claim 4The water supply means has a pressure adjusting part.
[0014]
  Claim5According to the described sanitary washing device, claim 1Any one of Claim 4In addition to the same effect as described above, it is possible to give an accurate pressure fluctuation to the discharge of the washing water without being influenced by the pressure fluctuation particularly on the high pressure side.
[0015]
  Claim6The sanitary washing device according to claim 1, claim 2, claim 3., Claim 4Or claims5The pressure fluctuation period of the pressurizing means is the pressure fluctuation period that can be recognized by the human body.
[0016]
  Claim6According to the sanitary washing device described in claim 1, claim 2, claim 3, Claim 4Or claims5In addition to the same effect as described above, for example, when the pressure fluctuation period is 50 Hz to 1 Hz, preferably 50 Hz to 10 Hz, a comfortable stimulation that can be clearly recognized by a person can be provided. When the pressure fluctuation period is higher than this, the feeling of irritation disappears and it becomes easier to feel that the washing water is received in a continuous flow. In particular, 50 to 10 Hz feels the most comfortable stimulation.
[0017]
  Claim7The sanitary washing device according to claim 1, claim 2, claim 3, claim 4., Claim 5Or claims6The heating means for washing water is provided between the water supply means and the pressurizing means.
[0018]
  Claim7According to the sanitary washing apparatus as described, claim 1, claim 2, claim 3, claim 4, Claim 5Or claims6In addition to the same effect as above, a pump having a sliding part is usually composed of a combination of different materials. A pressurization fluctuation period can be realized. In addition, since high pressure does not act on the heating means, a configuration to prevent the temperature from becoming unstable due to turbulence of washing water, a configuration to avoid fatigue due to deformation, shrinkage and expansion of the heating means, and more than necessary Therefore, there is no need to consider a configuration for achieving a high pressure resistance. Furthermore, since the heating means does not cause pulsation attenuation, the diameter of the pipe can be increased.
[0019]
  Claim8The sanitary washing device according to claimAny one of claims 1 to 7In this case, the temperature detecting means for detecting the temperature of the washing water is provided, and the pressure means operates after the temperature detecting means detects a predetermined temperature.
[0020]
  Claim8According to the described sanitary washing device, the claimAny one of claims 1 to 7In addition to the same effect as above, since the seal member including grease is operated after being softened, the load at the time of starting the pump is reduced, and the motor can be made smaller, so that the compactness can be achieved and the power consumption can be reduced.
[0021]
  Claim9The sanitary washing device according to claim5, Claims6, Claims7Or claims8The 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.
[0022]
  Claim9According to the described sanitary washing device, the claim5, Claims6, Claims7Or claims8In addition to the same effect as above, the flow rate can be controlled only by the control of the pressurizing means without being affected by the water pressure on the high-pressure side in particular, so that the optimum washing water can be controlled.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an overall view of a sanitary washing apparatus. This sanitary washing apparatus has a water supply means 1, a heating means 2, a pressurizing means 3, a discharge means 4, and a control unit 5.
[0024]
  The water supply means 1 includes a water supply pipe 6 connected to a water pipe, a water stop solenoid valve 7 capable of blocking the flow and pressure of water downstream, and a constant flow rate of water flowing therethrough when the water supply pressure exceeds a predetermined value. A constant flow valve 8 to be maintained and a main water channel system connected to the heating means 2 are branched, and a relief water circuit 9 is provided with its open end facing the toilet. The constant flow valve 8 and the relief water circuit 9 constitute a pressure adjusting unit. Further, a relief valve 10 is provided downstream of the pressurizing means 3 and is brought into an open state when a predetermined pressure or more is applied. This is a safety measure to prevent disconnection of the connecting hose and damage to the pipe line in the event that the pressurizing unit 3 operates with the downstream side being closed, because the pressurizing unit 3 discharges at a high pressure. is there. Here, the pressure adjusting unit is configured by the constant flow valve 8 and the relief water circuit 9, but a general constant pressure valve may be used.
[0025]
  The pressurizing means 3 has a pressure higher than the water supply pressure supplied from the water supply means 1.minimum valueThe periodic pressure fluctuation is performed. Pressurizing means3Is a pressure fluctuation period that can be recognized by the human body, for example, 50 Hz to 1 Hz, preferably 50 Hz to 10 Hz. In other words, the pressure fluctuation period is originally determined that the human body does not feel the vibration, so it is determined by many parameters such as amplitude and acceleration. The range related to is usually limited to 1000 Hz or less, and most of the important effects of vibration are in the range of 0.5 to 50 Hz, within which the human body has complex mass systems and elasticity with many parameters. "It is more appropriate to consider the human body as a viscoelastic body when vibration is applied to the surface of the human body above 50 Hz" (Human-Environmental System, Human Function Data Book). As described above, even if vibration exceeding 50 Hz is applied to the human skin, the skin surface is attenuated, and the person does not feel the vibration as vibration. The same can be said for the intermittent stimulation of the cleaning jet because it can be considered as a kind of vibration. In addition, as it is described that "vibration below 1 Hz is a special thing related to motion sickness" (ergonomic standards, numerical formula manual), it cannot be said that the frequency below 1 Hz is a comfortable frequency for humans. From these things, it can be said that the pressure fluctuation period which a human body can recognize is 50-1 Hz. As a result of the confirmation experiment, it was confirmed that 50 to 10 Hz felt the most comfortable stimulation.
[0026]
  The structure of the pressurizing means 3 is shown in FIG. In addition, when a vibration isolating rubber is interposed when the pressurizing unit 3 is installed, vibration and abnormal noise of the pressurizing unit 3 can be suppressed by the vibration control action. Further, the hardness of the discharge pipe of the pressurizing means 3 can be made higher than that of the upstream water supply pipe line, and pulsation attenuation due to the expansion and contraction of the pipe by the pressurizing means 3 can be reduced. In particular, noise can be prevented by fixing the discharge pipe or providing a dynamic vibration absorber at the resonance point.
[0027]
  Heating means 2 includes water supply means 1 and pressure means3Between. This heating means 2 is an instantaneous type without a hot water storage tank, and is configured by connecting a heat exchanger with a built-in heater on the upstream side of the relief valve 10. In this case, the heater is a ceramic heater that has an excellent temperature rising rate.
[0028]
  The discharge means 4 discharges as cleaning water supplied by being pressurized by the pressure means 3. In the embodiment, for example, a water channel switching valve 11 in the form of a four-way valve connected to the downstream side of the pressurizing means 3, a buttocks cleaning nozzle 12 connected to the water channel switching valve 11 and switched to each other, bidet cleaning A nozzle 13 and a cleaning nozzle 14 for cleaning the nozzles 12 and 13 are provided.
[0029]
  Temperature detection means 86Is to detect the temperature of the wash water,Temperature detection means 86After detecting the predetermined temperature, the pressurizing means 3 is controlled by the control unit 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.
[0030]
  The control unit 5 includes an electromagnetic valve 7, a heating means 2,Temperature detection means 86The pressurizing means 3 and the water channel switching valve 11 are controlled.
[0031]
  From the above configuration, first, the control unit 5 opens a water channel communicating with the cleaning nozzle 14 of the water channel switching valve 11 and opens the electromagnetic valve 7 so that a large pressure does not act on the upstream side of the water channel switching valve 11. This operation is not necessary when the water channel switching valve 11 is standing by at a 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 Even when malfunction occurs, it is possible to prevent an excessive pressure from acting on the water channel system, and the effect that the reliability of the device can be further improved in combination with the action of the relief valve 10 can be obtained. When the electromagnetic valve 7 is opened, tap water is supplied from the water supply pipe 6, but wash water is discharged from the escape water channel 9 to the toilet (not shown) according to the water flow resistance. At this time, the flow rate flowing through the water supply pipe 6 is adjusted to a predetermined value by the action of the constant flow rate valve 8. The constant flow valve 8 can be adjusted so that the amount of water used for washing can be adjusted to a certain amount of water. However, here, if the amount of water used for washing is about 450 cc, for example, the water supply pressure Is 50 kPa or more and can be adjusted to a constant flow rate of approximately 500 cc per minute. By doing so, it is possible to prevent the performance from varying even in a home where the booster for pressurization is installed from an area where the feedwater pressure is the lowest (for example, the Okinawa area). In addition, when the constant flow valve 8 has the above-mentioned performance, the feed water pressure supplied to the main water channel 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 water channel 9. The pressure loss at that time is the maximum value, which is less than that. Here, the water flow resistance of the escape waterway system 9 is determined so that about 10 kPa acts on the main waterway system.
[0032]
  Next, the control unit 5 starts energization of the heating unit 2 and adjusts the amount of energization while acquiring the temperature signal of the hot water detected by the temperature detection unit 86, and the temperature of the hot water supplied from the heating unit 2 is washed. Adjust the temperature to a suitable temperature. The heat exchanger used here has a so-called instantaneous type mature exchanger configuration that can be heated at an appropriate temperature before the normal temperature water that has flowed in flows out of the mature exchanger. Therefore, considering the shortening of boiling time and the lack of boiling capacity in winter, it is desirable that the heater has a capacity as large as possible. Has been selected. If this instantaneous heat exchanger is used, there is no need to keep warm water when not in use, so a significant reduction in power consumption can be expected.RiichiSince the outlet capacity of households is 15A, it is undeniable that the amount of water that can be boiled out is particularly scarce in the severe winter season.
[0033]
  If there is no need to reduce power consumption, the mature exchanger can be configured as a hot water tank of an appropriate size, and can be kept warm at an appropriate temperature and used as needed. In recent years, devices for 200V have begun to be introduced in the home, and if 200V is introduced also in the field of the present invention, the capacity will be further increased.heaterIt is possible to easily reduce the boiling time and improve the boiling capacity.
[0034]
  The washing water flows into the heating means 2 via the constant flow valve 8 or the like, absorbs heat while flowing inside the heating means 2 and rises in temperature, and after the temperature is detected on the outlet side of the heating means 2, the pressurizing means 3 Supplied to. The pressurizing unit 3 is operated when the temperature of the washing water heated by the heating unit 2 reaches a predetermined temperature, and increases the pressure of the water supply from the water supply unit 1 and periodically adds a pressure fluctuation. Here, the cleaning nozzle 14 in which communication is ensured is ejected toward the buttocks cleaning nozzle 12 and the bidet cleaning nozzle, and these are cleaned. After this nozzle cleaning operation, cleaning water is ejected from the butt cleaning nozzle 12 or the bidet cleaning nozzle 13 which is designated to be switched by the water channel switching valve 11, and the portion to be cleaned of the human body is cleaned. When the pressurizing means 3 is not in operation, a water supply pressure of about 10 kPa acts on the upstream side from the water supply means 1 and the washing water flows in the pipe line. Since the means 3 performs a suction operation in order to pressurize and discharge the feed water pressure, the pressure in the pipe line from the water feed means 1 to the pressurization means 3 is 0 or less, that is, a negative pressure state. With this configuration, it is possible to control the discharge flow rate only by controlling the pressurizing unit 3, and to easily adjust the flow rate.
[0035]
  FIG. 2 shows the configuration of the pressurizing 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 operations of the pump chambers 15 and 16 are shifted. A conversion mechanism 20 that arranges the pump chambers 15 and 16 so that the outer ends of the pistons 17 and 18 provided in the pump chambers 15 and 16 are opposed to each other and converts rotational motion into reciprocating motion between the pump chambers 15 and 16 is provided. Has been placed. The conversion mechanism 20 includes 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, and a motor 25 that rotationally drives the reduction gear 22. Consists of. When the motor 25 rotates and the crankshaft 21 of the reduction gear 22 rotates, the pistons 17 and 18 reciprocate by the operation of the crank rods 23 and 24. In this case, since the crankshaft 21 is shared, when one piston expands the pump chamber, the phase of the piston operation is shifted by approximately 180 degrees so that the other piston compresses the pump chamber.
[0036]
  On the other hand, the pump chambers 15 and 16 are connected to the water inlet port 32 via check valves 27 and 28 using, for example, umbrella valves, and are connected to the discharge port 33 via check valves 29 and 28. The Therefore, pressurized water is pumped from the discharge connection port 33 in the compression operation of the pump chambers 15 and 16, and hot water is sucked in from the water inlet connection port 32 in the expansion operation. Thus, the cleaning water is periodically discharged from the discharge connection port 33 by the piston operation.
[0037]
  35 and 36 are elastic seal members.
[0038]
  FIG. 3 shows the discharge pressures of the pump chambers 15 and 16. Q1 is the fluctuation of the discharge pressure in the pump chamber 15, and Q2 is the fluctuation of the discharge pressure in the pump chamber 16. The respective maximum pressures P1 are larger than the water supply pressure P2, which is 180 degrees out of phase with each other. As a result, the combined pressure fluctuation is as shown in FIG.
[0039]
  FIG. 4 shows the discharge fluctuation pressure of the washing 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), both of which are set higher than the feed water pressure. Further, the discharge pressure fluctuation center P0 = (P1-P3) / 2 is higher than the feed water pressure P2. Accordingly, the cleaning water ejected from the cleaning nozzle is not intermittently discharged, but is accompanied by continuous and periodic pressure fluctuations.
[0040]
  Therefore, it is possible to reduce the intermittent feeling of the discharged cleaning water, and it is possible to realize cleaning that provides a comfortable stimulus. In addition, 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. The reliability of the resin parts can be improved, the pain and discomfort caused by the intermittent feeling can be reduced, and the amount of washing water can be reduced as compared with the continuous flow.
[0041]
  A second embodiment of the present invention is shown in FIG. This is another form of the pressurizing 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 fixed to the piston 55, and the piston 55 is reciprocated by driving means including the motor 25, the reduction gear 22, the crank rod 23, and the like shown in the first embodiment. It has become. This piston 55 is provided with a ring-shaped groove 56, whereNitrileA special packing called X-ring 59 made of rubber is attached. This X ring 59O-ring,V packingAs shown in FIG. 5, the cut cross-section of the ring-shaped seal member is substantially X-shaped.
[0042]
  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 the positional relationship as shown in FIG. Integrated in the direction shown. The suction ports 60 and 62 communicate with the water inlet 32 via the check valves 27 and 29, the discharge ports 61 and 63 communicate with the discharge connection port 33, and the water inlet connection port 32 is connected to the heating means. The connection port 33 is connected to the water channel switching valve 11. Furthermore, the piston rod 36 and the cylinder part 40 areVSealed by 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 the left and right sides of the piston 55 in the drawing.
[0043]
  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 as the piston 55 moves, 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 an open state, but the check valve 30 provided in the discharge port 61 is in a closed state.
[0044]
  At the same time, since the volume of the pump chamber 66 decreases as the piston 55 moves, the cleaning water filling the pump chamber 66 is discharged from the discharge port 63. At this time, the check valve 27 provided at the suction port 62 is closed, and the check valve 28 provided at the discharge port 63 is opened.
[0045]
  Conversely, 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. Wash water is sucked through the suction port 62.
[0046]
  At this time, the X ring 59 pressure-divides the pump chamber 65 and the pump chamber 66, and the above-mentionedVAs with packing, the seal line is accurately formed with a contact area with a small lip. Therefore, the piston 55 can be reciprocated with a small force as well as improving the reliability, and the device can be reduced in size and cost. In addition, since the X ring 59 has a structure in which the adhesion is further increased when the pressure is increased in the forward and return times,VIt 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 serves as a grease reservoir, the grease can be prevented from flowing out even when operated for a long time, and the durability of the device is improved.
[0047]
  Also, the piston rod 36 and the cylinder part 29 are sealed.VSimilarly to the X ring 59, the packing 67 can surely create a sealed state with a small contact area, and a highly reliable apparatus free from external leakage can be realized. Needless to say, the driving force can be reduced.
[0048]
  Further, with such a configuration, the balance of the driving force is maintained during the forward and backward movement of the piston 55, so that vibration generated in the pressurizing means 2 can be extremely suppressed, and noise reduction can be achieved. The effect is also obtained. Furthermore, since the flow rate of cleaning water that can be discharged when the piston 55 reciprocates once is about twice that of a single pump chamber, the number of revolutions of the motor 25 can be halved. This contributes not only to ensuring quietness but also to improving the durability of the pressurizing means 2. Tsuma1The load on each pump chamber can be halved.
[0049]
  In addition, if the intermittent cycle of the wash water that is intermittently discharged is too slow, the user may feel uncomfortable. In this way, multiple pump chambers are provided, and suction / discharge of multiple pump chambers By making the phase of operation different, the intermittent feeling is mitigated, and comfortable human washing can be realized.
[0050]
  A third embodiment of the present invention is shown in FIGS. That is, FIG. 6 is different from the first embodiment in that the pressurizing unit 3 is composed of the first pressurizing unit 3a and the second pressurizing unit 3b connected in series.
[0051]
  FIG. 7 shows a gear pump as an example of the first pressurizing means 3a. Reference numeral 80 denotes a housing, 81 denotes a first gear, 82 denotes a second gear that meshes with the first gear 81, and 83 denotes a motor that drives the first gear 81. When the motor 83 rotates, the first gear 81 rotates in the direction of the arrow, and accordingly, the second gear 82 is driven and rotated in the opposite direction. For this reason, the air is sucked from the suction port 84 connected to the heating means 2 of the housing 80 and is pumped from the discharge port 85 to the second pressurizing means 3b at a constant pressure.
[0052]
  The first pressurizing means 3a may be a pump that continuously pressurizes a constant pressure, such as a centrifugal pump, an axial pump, or a vortex pump.
[0053]
  FIG. 8 shows a single-action reciprocating pump as an example of the second pressurizing means 3b. This pump is constituted by the pump chamber 16 and the conversion mechanism 20 on one side of FIG. 2, and the same reference numerals are given to the same portions. Therefore, when the motor 25 rotates, the piston 18 reciprocates through the conversion mechanism 20, and the pump chamber 16 expands and contracts. During expansion, the cleaning water enters the pump chamber 16 from the suction connection port 32 through the check valve 27. Flows in and is intermittently discharged from the discharge connection port 33 via the check valve 29 during contraction.
[0054]
  FIG. 9A shows the discharge pressure P1 of the first pressurizing means 3a, which is a constant pressure higher than the feed water pressure. FIG. 9B shows the discharge pressure of the second pressurizing means 3b, and the discharge pressure fluctuates intermittently as the piston 18 reciprocates. In the figure, the vibration centered on the feed water pressure is shown. FIG. 9C shows a combination of both discharge pressures and shows pulsation centered on the discharge pressure P1 of the first pressurizing means 3a.
[0055]
  The second pressurizing means 3b can be a diaphragm pump or an electromagnetic pump generally called a reciprocating pump.
[0056]
  In addition,In FIG.As shownIn the first embodiment and the third embodiment described above,Consists of a constant flow valve 8 and a relief water circuit 9Pressure adjustmentPart isWhen the pressurizing means 3 is in operation, the pressure between the water supply means 1 and the pressurizing means 3 is set to 0 or less.
[0057]
  Fig. 10 (a) shows pressure adjustmentPartA more regulated supply pressure is shown. This is the pressure adjustment when the pressurizing means 3 is not activated.Part isIn order to adjust the supply pressure of the cleaning water to Ps (when the electromagnetic valve is opened), this causes a state in which some cleaning water flows through the water channel, and this water pressure is applied to the pressurizing means 3.
[0058]
  FIG. 10D shows the time range of the pump operation. FIG. 10B shows the pump suction pressure Pp on the upstream side during the pump operation. Here, Ps ≦ | Pp |. FIG. 10C shows the pressure between the water supply means 1 and the pressure means 3 as a result. That is, the pressure between the water supply means 1 and the pressurizing means 3 is 0 or less during the pump operation. Therefore, the upstream side is always 0 or negative pressure during the pump operation, so that the discharge side of the pressurizing means is not affected even if the water pressure varies.
[0059]
【The invention's effect】
  According to the sanitary washing device of the present invention, since the pressure fluctuates while the jet from the discharge means is a continuous flow, it is possible to prevent an excessive intermittent feeling of the discharged wash water and to obtain a comfortable stimulus. Cleaning can be realized. Therefore, the pain and discomfort due to the intermittent feeling can be alleviated, and the amount of washing water can be reduced as compared with the continuous flow.
[Brief description of the 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 discharge pressure of each pump chamber of the pressurizing means.
FIG. 4 is a fluctuation waveform diagram of discharge pressure by a pressurizing unit.
FIG. 5 is a cross-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 cross-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 Upstream side during operation of pressurizing meansButIt is explanatory drawing when it becomes a negative pressure.
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 Discharge means
        5 Control unit
        8Constant flow valve
        9    Relief water circuit
      15 Pump room
      16 Pump room
      65 Pump room
      66 Pump room

Claims (9)

  A water supply means, a pressurizing means for performing periodically variable pressure discharge with a pressure higher than the water supply pressure supplied from the water supply means as a minimum value, and water supplied by being pressurized by the pressurization means. And a sanitary washing device provided with a discharge means for discharging as a liquid. A water supply means, a pressurizing means for performing periodically variable pressure discharge with a minimum value higher than a water supply pressure supplied from the water supply means by combining a plurality of pressure discharges, and a pressure applied by the pressure means. A sanitary washing apparatus comprising discharge means for discharging supplied water as washing water.   The sanitary washing apparatus according to claim 1 or 2, wherein the pressurizing means is a reciprocating pump having a plurality of pump chambers, and the phases of piston operations of the respective pump chambers are shifted.   4. The sanitary washing apparatus according to claim 3, wherein the reciprocating pump is a double-acting type having pump chambers on both sides of the piston.   The sanitary washing device according to any one of claims 1 to 4, wherein the water supply means includes a pressure adjusting unit.   6. The sanitary washing apparatus according to claim 1, wherein the pressure fluctuation period of the pressurizing means is a pressure fluctuation period that can be recognized by a human body.   The sanitary washing apparatus according to claim 1, 2, 3, 4, 5, or 6, wherein the washing water heating means is provided between the water supply means and the pressurizing means.   The sanitary washing apparatus according to any one of claims 1 to 7, further comprising a temperature detection unit that detects a temperature of the cleaning water, wherein the pressurization unit operates after the temperature detection unit detects a predetermined temperature.   The sanitary washing apparatus according to claim 5, 6, 7 or 8, wherein the pressure adjusting unit sets the pressure between the water supply means and the pressurizing means to 0 or less during operation of the pressurizing means.

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