JP2008111244A - Hot water washing toilet seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water washing toilet seat device capable of obtaining desired fluctuation pressure without increasing the size of a pump. <P>SOLUTION: This hot water washing toilet seat device is provided with a heating means for heating the wash water supplied from a water supply source, a pump for sucking the heated wash water and pressurizing it, and an injection means for jetting the pressurized wash water to a human private part. The pump is provided with a cylinder part having a pressure generating chamber for pressurizing the sucked wash water and partitioning the pressure generating chamber, a piston part provided slidably in the cylinder part, a driving means for reciprocating the piston part in the cylinder part, an opening and closing valve for regulating circulation of wash water in the pressure generating chamber by the reciprocating movement of the piston part, and a residual pressure adjusting means for adjusting residual pressure in a water channel (a secondary side water channel) extended from the pump to the injection means. Preferably, the residual pressure adjusting means is an orifice for communicating the pressure generating chamber with the secondary side water channel. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a warm water cleaning toilet seat device for cleaning a local part of a human body.

  In recent years, in a warm water washing toilet seat device for washing a local part of a human body, an instantaneous heating device has been used instead of a conventional hot water storage heating device. The instantaneous heating device does not need to keep the cleaning water at a predetermined temperature in advance, and it only has to supply power to the heater only during use. Even when a large amount of washing water is used for washing a local part of the human body, there are many advantages such as that the temperature of the washing water does not drop below a predetermined temperature and does not cause discomfort to the human body.

  However, in the warm water washing toilet seat device using the instantaneous heating device, the washing water must be heated to a suitable temperature in a very short time, and thus the flow rate of the washing water ejected from the nozzle to the human body part is limited. Therefore, there was a problem that a high cleaning feeling and cleaning power could not be obtained.

In order to solve this problem, there has been proposed a hot water cleaning apparatus including a pump that generates a pulsating flow (see Patent Document 1). This pump is interposed in the middle of a pipe connecting the instantaneous heating device and the nozzle part, and includes a cylinder having a suction port and a discharge port for cleaning water, and by reciprocating a piston built in the cylinder, By sucking and discharging the heated washing water, a pulsating flow in which the ejection pressure fluctuates is generated. Thereby, since the sucked warm water can be ejected to the human body part at a high pressure, the user can obtain a high cleaning feeling and a high cleaning power with a small amount of cleaning water.
JP 2003-328420 A

  As described above, a water channel switching valve, a nozzle, and the like are disposed downstream of the pump that generates a pulsating flow, and these are generally connected by a rubber hose. However, since the rubber hose expands or contracts due to fluctuations in the water pressure, the pulsation pressure generated by the pump is attenuated and relaxed. For this reason, it becomes difficult to give a predetermined fluctuating pressure to the jetted washing water, and the user cannot obtain satisfactory washing feeling and washing power. Therefore, in order to increase the maximum pressure of the fluctuating pressure so as to obtain a predetermined fluctuating pressure and increase the capacity of the pump, the pump must be enlarged. If the pump is increased in size, the cost of the toilet seat device will increase, and there will be a problem that the flow rate of washing water accompanying the increase in size will increase, making it impossible to maintain the maximum flow rate permitted by the instantaneous hot water supply system.

  This invention is made | formed in order to solve such a problem, and makes it a subject to provide the warm water washing toilet seat apparatus which can obtain a desired fluctuation | variation pressure, without enlarging a pump.

  Since the maximum value of the fluctuating pressure is determined by the feed water pressure of the washing water and the capacity of the pump, the present inventor has focused on improving the feeling of washing by increasing the differential pressure of the pulsating flow generated by the pump. did.

  FIG. 4 is a graph conceptually showing the pressure change of the pulsating flow by the pump. The horizontal axis is time, and the vertical axis is pressure.

A waveform F ₀ indicated by a broken line indicates a pressure change of the cleaning water discharged from the pump, and a waveform F ₁ indicated by a solid line indicates a pressure change of the cleaning water ejected from the nozzle. Since the suctioned cleaning water is pressurized by the piston and discharged from the pump, the cleaning water discharged from the pump is the highest across the water supply pressure Px as shown by the waveform F ₀ shown by the broken line in FIG. A pulsating flow having a differential pressure S ₀ with a pressure P ₁ and a minimum pressure P ₀ .

However, for example, when a rubber hose is used in a water channel from the pump to the ejection means (hereinafter referred to as a secondary side water channel), the rubber hose expands or contracts due to fluctuations in water pressure. It is attenuated and relaxed and ejected from the nozzle. That is, the maximum pressure of the cleaning water ejected from the nozzle becomes P _max lower than the maximum pressure P _{1 of the} cleaning water discharged from the pump by expansion of the rubber hose by ΔP1, and the minimum pressure of the cleaning water ejected from the nozzle is Due to the shrinkage of the rubber hose, P _min is higher than P ₀ by ΔP ₂ . Therefore, the pressure difference S ₁ is smaller than the pressure difference S ₀ of the generated pressure pulsations in the pump.

As described above, since the maximum value of the fluctuating pressure is determined by the supply pressure of the cleaning water and the capacity of the pump, in order to raise the maximum pressure P _max of the cleaning water ejected from the nozzle to P ₁ , the supply water pressure is increased. Must increase or increase pumping capacity. However, by lowering the minimum pressure P _min of washing water released from the nozzle to P2 as shown in FIG. 4 (b), it is possible to increase the differential pressure S ₁ until the differential pressure S _2.

  That is, the warm water washing toilet seat device of the present invention includes a heating means for heating washing water supplied from a water supply source, a pump for sucking and pressurizing washing water heated by the heating means, and the pressurized washing A warm water washing toilet seat device comprising a jetting means for jetting water to a local body part, wherein the pump has a pressure generating chamber for pressurizing the sucked washing water and defines a pressure generating chamber, and a cylinder portion Piston part slidably provided, drive means for reciprocating the piston part in the cylinder part, on-off valve for restricting the flow of cleaning water in the pressure generating chamber by reciprocating movement of the piston part, and secondary side water channel of the pump And a residual pressure adjusting means for adjusting the residual pressure generated in the step.

  According to the warm water washing toilet seat device of the present invention, the washing water pressurized by the pump is sent to the ejection means, and the washing water is jetted to the human body part by the ejection means. Also, in the cylinder part of the pump, the piston part reciprocates by the driving means, and pressure fluctuation is given to the pressure generation chamber of the cylinder part, and washing water is sucked into the cylinder or discharged from the cylinder by this pressure fluctuation. Is done. Then, for example, the residual pressure generated in the secondary water channel due to the expansion of the rubber hose is reduced by the residual pressure adjusting means, whereby the differential pressure of the cleaning water ejected from the nozzle can be increased.

In the warm water washing toilet seat device according to the present invention, it is desirable that the residual pressure adjusting means is an orifice communicating the pressure generating chamber and the secondary side water channel. Since the residual pressure adjusting means is an orifice, by selecting the inner diameter of the orifice, the residual pressure ΔP ₂ in the secondary water channel can be reduced without reducing the maximum pressure P _max of the wash water ejected from the nozzle. it can. Further, since it can be realized simply by providing an orifice in a conventional piston, the feeling of cleaning and the cleaning power can be easily improved at low cost.

  A preferred embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a block diagram showing a main configuration of a warm water washing toilet seat device of the present invention.

  The warm water washing valve seat device 1 of the present invention includes a water supply source S, a heating means H, a pump P, and a jetting means N, and a secondary water channel from the pump P to the jetting means N is connected by a rubber hose G. The washing water W supplied from the water supply source S is heated by the heating means H to become warm water, pressurized by the pump P, and ejected from the ejection means N toward the human body part.

  FIG. 2 is a schematic partial sectional view for explaining the pump P of the present embodiment, in which 11 is a motor, 12 is a cylinder, and 13 is a piston. The piston 13 is slidably provided in the cylinder 12 while maintaining airtightness, and reciprocates in the direction of the arrow Y in the cylinder 12 by the rotation of the motor 11.

  The cylinder 12 is provided with a suction port 15 for sucking the cleaning water W into the pressure generation chamber 14 of the cylinder 12 and a discharge port for discharging the pressure from the pressure generation chamber 14. A suction-side water conduit 17 a provided in the suction-side port 17 communicates with the suction port 15, and a discharge-side water conduit 18 a provided in the discharge-side port 18 communicates with the discharge port 16. The suction side port 17 is connected to a primary side water channel connected to the water supply source S, and the discharge side port 18 is connected to a rubber hose G which is a secondary side water channel connected to the ejection means N.

  The suction port 15 is provided with a suction-side on-off valve 19 (a dotted line indicates when the valve is open) that contacts and separates from the suction port by reciprocating movement of the piston 13 to restrict the flow of cleaning water. The outlet 16 is provided with a discharge-side on-off valve 20 (a dotted line “a” indicates when the valve is opened) that contacts and separates from the discharge port 16 by the reciprocating movement of the piston 13 to restrict the outflow of cleaning water. An orifice Q that can communicate the pressure generation chamber 14 of the cylinder 12 whose pressure fluctuates due to the reciprocation of the piston 13 and the discharge side conduit 18 a without passing through the discharge side opening / closing valve 20 is adjacent to the discharge port 16. Is provided.

  3 (a) is an enlarged view of the discharge port 16 side (circle A), and FIG. 3 (b) is a cross-sectional view taken along the line BB in FIG. 3 (a) when the discharge-side on / off valve 20 is viewed from the front. FIG. A valve seat 16a is formed in the opening of the discharge port 16 so as to protrude into the recess 16b.

  In the present embodiment, the discharge-side on / off valve 20 is a movable piece 21b of a sheet-like elastic body 21 that is continuously and integrally formed by a suction-side on / off valve 19 and a base portion 21a. The orifice Q is formed so as to open to the pressure generating chamber 14 from the bottom of the recess 16b. Therefore, when the movable piece 21b is in contact with the valve seat 16a, the pressure generating chamber 14 and the discharge side conduit 18a can communicate with each other via the orifice Q.

  In the pump P, when the piston 13 rises and the pressure in the pressure generation chamber 14 decreases, the suction side opening / closing valve 19 opens the suction port 15 to connect the pressure generation chamber 14 and the suction conduit 17a and also opens and closes the discharge side. Since the valve 20 closes the discharge port 16, the wash water can be sucked from the primary side water channel through the suction side water channel 17a.

  In the present embodiment, since the orifice Q is provided on the discharge port 16 side, an appropriate amount of washing is performed from the secondary side water channel via the orifice Q communicating with the discharge side water conduit 18a simultaneously with the suction from the primary side water channel. The residual pressure in the rubber hose can be reduced by sucking water.

  On the other hand, at the time of discharge of the washing water in which the piston 13 is lowered and the pressure in the pressure generation chamber 14 is increased, the discharge side opening / closing valve 20 opens the discharge port 16 to connect the pressure generation chamber 14 and the discharge side water conduit 18a. At the same time, the suction-side opening / closing valve 19 closes the suction port 15, so that the suctioned wash water can be discharged from the pressure generation chamber 14 toward the secondary-side water channel via the discharge-side water conduit 18 a.

When a rubber hose is used in the secondary water channel, the residual pressure varies depending on the hardness and length of the rubber hose or the arrangement method. However, according to this embodiment, the diameter of the orifice Q, it is possible to easily optimize the pressure difference S ₂ simply appropriately adjusted within a range for example of about 0.3～0.5Mmfai.

  By providing such a pump P, it is possible to provide a warm water washing toilet seat device that can provide an excellent feeling of washing without increasing the size of the pump P and therefore without increasing the cost.

  In addition, the warm water washing toilet seat apparatus of this invention is not limited to said embodiment, You may change in the range which does not deviate from the main point of this invention. For example, in the above-described embodiment, the orifice Q is disposed in the cylinder portion 12, but the orifice Q only needs to be able to communicate with the pressure generation chamber 14 and the secondary side water channel when the cleaning water is sucked. It may be provided at any position.

  Hereinafter, the warm water washing toilet seat device of the present invention will be described in more detail by way of examples.

  FIG. 5 is an explanatory diagram illustrating the configuration of the hot water cleaning toilet seat device 2 according to the present embodiment.

  The warm water flush toilet seat device 2 includes a control unit 30, a branch tap 31, a strainer 32, a check valve 33, a constant flow valve 34, a water stop solenoid valve 35, a relief valve 36, a temperature sensor 37, a heat exchanger 38, and a vacuum breaker. 39, the accumulator 41, the pump P, and the nozzle unit 60 are provided, and the pump P and the nozzle unit 60 are connected to each other through a rubber hose or the like so as to allow water to pass therethrough. The nozzle unit 60 includes a switching valve 62 and a nozzle portion 63. The nozzle portion 63 includes a butt cleaning nozzle 63a, a bidet cleaning nozzle 63b, a nozzle cleaning nozzle 63c, and a drain (open to the atmosphere) 63d. And based on the signal from the operation part 20, the control part 30 controls the pump P, the switching valve 62, the nozzle part 63, etc. suitably, and injects wash water to a human body local part with suitable temperature and suitable pressure. Here, the heat exchanger 38 is a heating means, and the nozzle unit 60 is an ejection means.

  FIG. 6 is a schematic cross-sectional view illustrating the configuration of the pump P interposed in the hot water washing valve seat device 2.

  The pump P includes a motor 41, a first housing 42, a second housing 43, and a third housing 44. The motor 41 is fixed to the side surface of the first housing 42, and the rotation shaft 41 a is fitted into the first housing 42. A worm gear 45 is fitted on the rotation shaft 41a, and a worm wheel 46 that is linked to the worm gear 45 is disposed inside the first housing 42 so as to be rotatable by the rotation of the motor shaft 41a.

  The worm wheel 46 has a small elliptical cam 47 and a large elliptical cam 48 sandwiching the worm wheel 46 so that their respective rotational axes are coaxial with the rotational axis 46a of the worm wheel 46 and their respective major axes are orthogonal to each other. It is integrally formed. Further, a piston 49 having windows 49 a and 49 b circumscribing the small elliptic cam 47 and the large elliptic cam 48 is provided slidably along the inner surface 42 a of the first housing 42.

  Since the pump P has such a configuration, when the motor 41 is rotated, the rotational force rotates the worm wheel 46 via the worm gear 45 and the elliptical cams 47 and 48. Since the small elliptical cam 47 and the large elliptical cam 48 rotate while sliding in contact with the window portions 49a and 49b of the piston 49, respectively, the piston 49 can be reciprocated in the arrow Y direction.

  A second housing 43 is provided in connection with the first housing 42. The second housing 43 has a suction port 15 for sucking cleaning water and a discharge port 16 for discharging the sucked cleaning water. It is formed in communication with the internal space 14. In addition, a diaphragm 50 is disposed at a connection boundary between the first housing 42 and the second housing 43, and the internal space 14 is partitioned in an airtight manner. Since the front end surface 49 c of the piston 49 is disposed in contact with the central portion of the diaphragm 50, the internal space 14 is a pressure at which the internal pressure fluctuates due to a change in the pressing force of the piston 49 applied through the diaphragm 50. It is a generation room.

  A third housing 44 is further connected to the second housing 43, and the third housing 44 includes a suction side conduit 17 a for washing water sucked into the pressure generation chamber (internal space) 14 and the pressure generation chamber 14. A pressurized discharge side conduit 18a for cleaning is provided.

  In addition, a valve seat (open / close valve) 51 that restricts the flow of the cleaning water is disposed at the boundary surface between the second housing 43 and the third housing 44. The valve seat 51 is integrally formed with a movable piece (suction side on-off valve 19) that contacts and separates from the suction port 15 and a movable piece (discharge side on-off valve 20) that contacts and separates from the discharge port 16.

  An orifice Q is provided adjacent to the discharge port 16 so as to communicate the pressure generating chamber 14 whose pressure fluctuates due to the reciprocating motion of the piston 13 and the discharge side conduit 18a.

  The pump P of the present embodiment supplies water from the suction port 15 during water supply, and sucks cleaning water from the discharge side conduit 18a from the orifice Q. In this example, by providing the orifice Q having an inner diameter of 0.5 mm, the differential pressure of the cleaning water ejected from the nozzle could be increased by about 20% compared to before the orifice Q was installed.

  Here, the first to third housings are cylinder parts, the small elliptical cam 47, the large elliptical cam 48 and the piston 49 are piston parts, and the motor 41, the worm gear 45 and the worm wheel 46 are driving means.

  The present invention is suitable for a warm water washing toilet seat device for washing a local part of a human body. Among them, it is suitable for use in a hot water storage type small flow rate type or instant heating type hot water washing toilet seat device.

It is a block diagram which shows the main structures of the warm water washing toilet seat apparatus of embodiment. It is a fragmentary sectional view explaining the composition outline of the pump of an embodiment. It is an expansion perspective view near a discharge outlet. (A) is a fragmentary sectional view, (b) is a BB sectional view. It is a conceptual graph which shows the pressure change of a pulsating flow. (A) is a prior art example, (b) is a case of the warm water washing toilet seat apparatus of this invention. It is a schematic block diagram explaining the structure of the warm water washing toilet seat apparatus of an Example. It is the cross-sectional schematic diagram of the pump interposed in the warm water washing toilet seat apparatus of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11: Drive means 12: Cylinder part 13: Piston part 14: Pressure generating chamber 15: Suction port 16: Discharge port 19: Suction side on-off valve 20: Discharge side on-off valve 41: Motor 42, 43, 44: Housing 46: Worm Wheel 47: Small elliptical cam
48: Large elliptical cam 49: Piston 50: Diaphragm H: Heating means P, 3: Pump Q: Orifice N: Nozzle unit S: Water supply source

Claims (2)

Heating means for heating the wash water supplied from the water supply source, a pump for sucking and pressurizing the wash water heated by the heating means, and an ejection means for jetting the pressurized wash water to the local body part A warm water washing toilet seat device comprising:
The pump has a pressure generation chamber that pressurizes the suctioned wash water, and defines a cylinder portion that partitions the pressure generation chamber, a piston portion that is slidably provided in the cylinder portion, and the piston portion that is disposed in the cylinder. Drive means for reciprocating movement in the section, on-off valve for restricting the flow of the washing water in the pressure generating chamber by reciprocating movement of the piston section, and residual pressure for adjusting the residual pressure generated in the water passage from the pump to the ejection means A warm water washing toilet seat device comprising pressure adjusting means.   The warm water flush toilet seat device according to claim 1, wherein the residual pressure adjusting means is an orifice that communicates the pressure generating chamber and a water passage from the pump to the ejection means.

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