JP4486317B2 - Nozzle device and sanitary washing device provided with the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sanitary washing device for washing a local part of a human body.
[0002]
[Prior art]
Various functions have been devised in a sanitary washing apparatus for washing a local part of a human body in order to realize washing according to user's preference. For example, a function of adjusting the ejection form of the washing water ejected from the nozzle in order to realize the cleaning according to the user's preference is provided (for example, see Patent Document 1).
[0003]
According to the said literature, the user can adjust the ejection form of the washing water ejected from a nozzle according to a user's preference.
[0004]
[Patent Document 1]
Japanese Patent No. 3292185
[Problems to be solved by the invention]
The nozzle device described in the above document has a swivel imparting chamber, an eccentric conduit, and an axial center directing conduit communicating with the water discharge hole. The eccentric pipe line is eccentrically communicated with the swirl imparting chamber and allows the cleaning water to flow into the swirl imparting chamber. In this case, the wash water that has flowed into the swirl imparting chamber is swirled and ejected from the water discharge hole. In addition, the axial center-directed conduit communicates with the swirl imparting chamber with its axis oriented, and allows cleaning water to flow into the swirl imparting chamber. In this case, the washing water that has flowed into the swirl imparting chamber is ejected from the water discharge hole without being imparted with the swirl force.
[0006]
By adjusting the ratio of the flow rate of the cleaning water supplied to the eccentric conduit and the flow rate of the cleaning water supplied to the axial center-directed conduit, the degree of the turning force can be varied and the cleaning range can be set wide or narrow.
[0007]
However, in the above-described conventional nozzle device, pressure loss is generated when the washing water ejected from the water discharge hole through the swirl imparting chamber through the swirl imparting chamber receives a large flow resistance in the swirl imparting chamber. Therefore, the flow rate of the cleaning water ejected from the water discharge hole is reduced.
[0008]
The user generally desires a strong cleaning feeling due to the linear flow and a soft cleaning feeling due to the wide swirling flow. Therefore, it is desired to efficiently eject a linear flow having a high flow velocity. On the other hand, downsizing of the nozzle device is also desired in order to make the sanitary washing device compact.
[0009]
An object of the present invention is to provide a nozzle device that can efficiently eject wash water and that can be miniaturized, and a sanitary washing device including the nozzle device.
[0010]
[Means for Solving the Problems]
The nozzle device according to the present invention is a nozzle device that ejects cleaning water, and has an ejection member having an opening on one end side and a hole on the other end side, and an ejection space for ejecting cleaning water. A first flow path that leads from the opening side to the first flow path, a second flow path that guides wash water from the circumferential surface side to the ejection space, a pipe line that forms the second flow path, and an outer periphery of the pipe line The first flow path is formed by a space between the inner peripheral surface of the cover member and the outer peripheral surface of the pipe, and the ejection space is formed from the opening side. A first space having a first inner diameter toward the hole side, a second cylindrical space having a second inner diameter smaller than the first inner diameter, and a third inner diameter smaller than the inner diameter of the second cylindrical space The extension of the inner wall on the outer side of the second flow path is a concentric circle on the inner side of the inner peripheral surface of the second cylindrical space. To match the line, and the second flow path and the second cylindrical space in which to communicate.
[0011]
In the nozzle device according to the present invention, cleaning water is supplied from the opening side of the ejection space by the first flow path. Since the cross-sectional area of the ejection space decreases stepwise or continuously from the opening to the hole, the wash water supplied from the opening side is ejected from the hole by increasing the flow rate stepwise or continuously. In this case, the washing water flows from the opening having a large cross-sectional area into the ejection space toward the hole, and the washing water receives resistance only from the inner peripheral surface of the ejection space, so that the pressure loss is small. Therefore, a linear flow having a high flow velocity is efficiently ejected from the hole.
[0012]
Further, the cleaning side is supplied from the peripheral surface side of the ejection space by the second flow path. As a result, the washing water flows along the inner peripheral surface of the ejection space, so that a turning force is applied, and the washing water is ejected as a swirling flow while spreading from the hole. In this case, since the washing water does not receive resistance from the opening side but receives resistance only from the inner peripheral surface, the pressure loss is small. Therefore, the swirl flow is efficiently ejected from the hole.
[0013]
Furthermore, since the ejection space has a structure with a small pressure loss, there is no need to increase the cross-sectional area of the flow path in order to reduce the pressure loss. Therefore, it is possible to reduce the size of the nozzle device.
In addition, the second flow path and the second cylindrical space are arranged such that the extension line of the inner wall on the outer side of the second flow path coincides with the tangential line of the concentric circle on the inner side of the inner peripheral surface of the second cylindrical space. And communicate. Thereby, the wash water supplied from the second flow path to the second cylindrical space does not disturb the velocity distribution of the swirling flow that flows through the second cylindrical space. Therefore, the washing water in the second cylindrical space can be efficiently swirled.
As a result, the washing water ejected from the hole has a spreading angle, and the user can obtain a soft feeling of washing.
Further, the cross-sectional area of the first flow path is increased without increasing the size of the cover member. Therefore, the nozzle device can be reduced in size, and cleaning water can be efficiently ejected.
[0018]
The first space may have an inner diameter that continuously decreases from the opening to the second cylindrical space. In this case, the wash water flowing through the first space is continuously ejected from the hole with an increased flow velocity. Further, the flow path loss of the first space is reduced, and the pressure loss of the washing water is reduced. Therefore, the water force at the time when the washing water is ejected from the hole portion is increased, which is efficient.
[0019]
The third space may have an inner diameter that continuously decreases from the second cylindrical space to the hole. In this case, the wash water flowing through the third space is ejected from the hole portion with the flow velocity continuously increased. Further, the flow path loss of the third space is reduced, and the pressure loss of the washing water is reduced. Therefore, the water force at the time when the washing water is ejected from the hole portion is increased, which is efficient.
[0020]
The inner diameter of the second cylindrical space may be 2 to 5 times the inner diameter of the hole. In this case, the flow rate of the washing water ejected from the hole can be increased while reducing the flow path loss.
[0021]
The cross-sectional area of the first channel may be larger than the cross-sectional area of the opening of the ejection space. In this case, the pressure loss of the washing water flowing through the first flow path is reduced. Therefore, a high pressure can be maintained until the cleaning water flows into the opening of the ejection space.
[0024]
The tip of the cover member may be closed with a substantially hemispherical inner peripheral surface. In this case, it becomes difficult for dirt to adhere to the nozzle tip. Moreover, it becomes easy to wash away the adhered dirt. Therefore, the nozzle device is kept clean.
[0025]
The cover member may have a peripheral wall portion and a tip portion that are integrally formed. In this case, there is no seam in the cover member, and dirt is difficult to adhere. Moreover, it becomes easy to wash away the adhered dirt. Therefore, the nozzle device is kept clean.
[0026]
The cover member may have an ejection hole having an inner diameter larger than that of the hole. In this case, the washing water ejected from the hole does not hit the ejection hole, and the ejection of the washing water is not hindered.
[0027]
You may further provide the cyclic | annular sealing member which seals between the ejection member in the circumference | surroundings of a hole part, and the cover member in the circumference | surroundings of an ejection hole. In this case, the cleaning water in the first flow path does not flow out of the ejection hole through the gap between the ejection member and the cover member. Moreover, even if dirt adheres to the tip of the nozzle device, the dirt does not directly enter the first flow path from the ejection hole through the gap between the ejection member and the cover member. Further, even when dirt entering from the ejection hole enters the hole, the dirt is immediately discharged by the washing water ejected from the hole. Therefore, the inside of the nozzle device can always be kept clean.
[0028]
The cover member may be made of metal. In this case, the pressure of the washing water is not absorbed by the cover member. Therefore, the cleaning water can be efficiently ejected.
[0029]
A sanitary washing device according to the present invention is a sanitary washing device that jets wash water supplied from a water supply source to a human body, and includes a pressurizing unit that pressurizes the wash water supplied from the water supply source, a nozzle device, Path selection means for selectively supplying cleaning water pressurized by the pressure means to one or both of the first flow path and the second flow path of the nozzle device.
[0030]
In the sanitary washing apparatus according to the present invention, the wash water pressurized by the pressurizing means is supplied to the route selecting means, and the wash water supplied to the route selecting means is selectively supplied to the first flow path by the route selecting means. And one or both of the second flow paths.
[0031]
Wash water is supplied from the opening side of the ejection space through the first flow path. Since the cross-sectional area of the ejection space decreases stepwise or continuously from the opening to the hole, the wash water supplied from the opening side is ejected from the hole by increasing the flow rate stepwise or continuously. In this case, the washing water flows from the opening having a large cross-sectional area into the ejection space toward the hole, and the washing water receives resistance only from the inner peripheral surface of the ejection space, so that the pressure loss is small. Therefore, a linear flow having a high flow velocity is efficiently ejected from the hole.
[0032]
Further, the cleaning side is supplied from the peripheral surface side of the ejection space by the second flow path. As a result, the washing water flows along the inner peripheral surface of the ejection space, so that a turning force is applied, and the washing water is ejected as a swirling flow while spreading from the hole. In this case, since the washing water does not receive resistance from the opening side but receives resistance only from the inner peripheral surface, the pressure loss is small. Therefore, the swirl flow is efficiently ejected from the hole. Furthermore, since the ejection space has a structure with a small pressure loss, there is no need to increase the cross-sectional area of the flow path in order to reduce the pressure loss. Therefore, the sanitary washing apparatus can be downsized.
[0033]
The pressurizing unit may include a reciprocating pump that pressurizes the cleaning water with a periodically varying pressure, and may further include a control unit that controls the operation of the reciprocating pump. In this case, the washing water can be ejected at a pressure that varies periodically by the pressurizing means. Therefore, a high feeling of washing can be given to the human body even with a small amount of washing water. Further, since the operation of the reciprocating pump can be controlled by the control means, the pressure fluctuation of the washing water can be controlled according to the user's preference.
[0034]
You may further provide the heating means which heats the wash water supplied from the water supply source, and supplies it to a pressurization means. In this case, since the cleaning water supplied from the water supply source can be heated by the heating means and supplied to the pressurizing means, the cleaning water heated appropriately from the ejection holes can be ejected.
[0035]
The heating means may be an instantaneous heating device that heats the cleaning water supplied from the water supply source while flowing it. In this case, the cleaning water is heated while flowing by the instantaneous heating device. Accordingly, since the cleaning water is heated only when the sanitary cleaning device is used, power consumption can be minimized.
[0036]
The route selection means may include a flow rate adjusting means for adjusting a flow rate ratio of the cleaning water supplied to the first flow path and the second flow path. In this case, the flow rate ratio of the cleaning water flowing through the first route and the second route can be adjusted by the flow rate adjusting means. Therefore, the spread angle of the washing water ejected from the ejection holes can be adjusted.
[0037]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a sanitary washing device according to an embodiment of the present invention will be described.
[0038]
FIG. 1 is a perspective view showing a state in which the sanitary washing device according to the present embodiment is mounted on a toilet.
[0039]
As shown in FIG. 1, the sanitary washing device 100 is mounted on the toilet bowl 600. The tank 700 is connected to a water pipe and supplies cleaning water into the toilet 600.
[0040]
The sanitary washing device 100 includes a main body 200, a remote operation device 300, a toilet seat 400 and a lid 500.
[0041]
A toilet seat 400 and a lid 500 are attached to the main body 200 so as to be freely opened and closed. Furthermore, the main body part 200 is provided with a cleaning water supply mechanism including the nozzle part 30 and a control part is incorporated. The control unit of the main body 200 controls the cleaning water supply mechanism based on a signal transmitted by the remote operation device 300 as will be described later. Further, the control unit of the main body 200 also controls a heater built in the toilet seat 400, a deodorizing device (not shown) and a warm air supply device (not shown) provided in the main body 200.
[0042]
FIG. 2 is a schematic diagram illustrating an example of the remote operation device 300 of FIG.
As shown in FIG. 2, the remote control device 300 includes a plurality of LEDs (light emitting diodes) 301, a plurality of adjustment switches 302, a butt switch 303, a stimulation switch 304, a stop switch 305, a bidet switch 306, a drying switch 307, and a deodorizing switch. 308.
[0043]
The user presses down the adjustment switch 302, the butt switch 303, the stimulation switch 304, the stop switch 305, the bidet switch 306, the drying switch 307, and the deodorizing switch 308. Thereby, the remote control device 300 wirelessly transmits a predetermined signal to a control unit provided in the main body 200 of the sanitary washing device 100 described later. The control unit of the main body unit 200 receives a predetermined signal wirelessly transmitted from the remote operation device 300, and controls the washing water supply mechanism and the like.
[0044]
For example, when the user presses down the butt switch 303 or the bidet switch 306, the nozzle part 30 of the main body part 200 in FIG. 1 moves and the washing water is ejected. By depressing the stimulation switch 304, washing water that gives stimulation to a local portion of the human body is ejected from the nozzle unit 30 of the main body unit 200 of FIG. By depressing the stop switch 305, the ejection of the washing water from the nozzle unit 30 is stopped.
[0045]
Further, when the drying switch 307 is pressed, hot air is jetted from a hot air supply device (not shown) of the sanitary washing device 100 to a local part of the human body. By depressing the deodorizing switch 308, the surrounding deodorizing is performed by the deodorizing device (not shown) of the sanitary washing device 100.
[0046]
The adjustment switch 302 includes water flow adjustment switches 302a and 302b, temperature adjustment switches 302c and 302d, and nozzle position adjustment switches 302e and 302f.
[0047]
When the user depresses the nozzle position adjustment switches 302e and 302f, the position of the nozzle portion 30 of the main body 200 of the sanitary washing apparatus 100 in FIG. 1 changes, and the nozzles by depressing the temperature adjustment switches 302c and 302d. The temperature of the cleaning water ejected from the section 30 changes. In addition, by depressing the water pressure adjustment switches 302a and 302b, the water pressure (pressure) of the cleaning water ejected from the nozzle portion 30 and the ejection form are changed. As the adjustment switch 302 is pressed, a plurality of LEDs (light emitting diodes) 301 are lit.
[0048]
Hereinafter, the main body 200 of the sanitary washing device 100 according to the present embodiment will be described. FIG. 3 is a schematic diagram showing the configuration of the main body 200 of the sanitary washing device 100 according to the present embodiment.
[0049]
3 includes a control unit 4, a branch tap 5, a strainer 6, a check valve 7, a constant flow valve 8, a water stop solenoid valve 9, a flow sensor 10, a heat exchanger 11, a temperature sensor 12a, 12b, the pump 13, the switching valve 14, and the nozzle part 30 are included. The nozzle unit 30 includes a buttocks nozzle 1, a bidet nozzle 2 and a nozzle cleaning nozzle 3.
[0050]
As shown in FIG. 3, the branch tap 5 is inserted in the water pipe 201. A strainer 6, a check valve 7, a constant flow valve 8, a water stop electromagnetic valve 9, a flow sensor 10, and a temperature sensor 12 a are sequentially connected to the pipe 202 connected between the branch tap 5 and the heat exchanger 11. It is inserted. Further, a temperature sensor 12 b and a pump 13 are inserted in a pipe 203 connected between the heat exchanger 11 and the switching valve 14.
[0051]
First, purified water flowing through the water pipe 201 is supplied to the strainer 6 by the branch tap 5 as cleaning water. The strainer 6 removes dust and impurities contained in the cleaning water. Next, the check valve 7 prevents the backflow of the cleaning water in the pipe 202. And the flow volume of the washing water which flows through the piping 202 by the constant flow valve 8 is maintained constant.
[0052]
A relief pipe 204 is connected between the pump 13 and the switching valve 14, and a relief water pipe 205 is connected between the water stop solenoid valve 9 and the flow sensor 10. A relief valve 206 is inserted in the relief pipe 204. The relief valve 206 is opened when the pressure in the pipe 203, particularly on the downstream side of the pump 13, exceeds a predetermined value, and prevents problems such as damage to the equipment and disconnection of the hose at the time of abnormality. On the other hand, of the cleaning water supplied with the flow rate adjusted by the constant flow valve 8, the cleaning water not sucked by the pump 13 is released and discharged from the water pipe 205. Thereby, a predetermined back pressure acts on the pump 13 without being influenced by the water supply pressure.
[0053]
Next, the flow rate sensor 10 measures the flow rate of the cleaning water flowing in the pipe 202 and gives the measured flow rate value to the control unit 4. Further, the temperature sensor 12 a measures the temperature of the cleaning water flowing in the pipe 202 and gives a temperature measurement value to the control unit 4.
[0054]
Subsequently, the heat exchanger 11 heats the cleaning water supplied through the pipe 202 to a predetermined temperature based on the control signal given by the control unit 4. The temperature sensor 12 b measures the temperature of the cleaning water heated to a predetermined temperature by the heat exchanger 11 and gives a temperature measurement value to the control unit 4.
[0055]
The pump 13 pumps the wash water heated by the heat exchanger 11 to the switching valve 14 based on a control signal given by the control unit 4. The switching valve 14 supplies cleaning water to any one of the butt nozzle 1, the bidet nozzle 2, and the nozzle cleaning nozzle 3 based on the control signal given by the control unit 4. Accordingly, the cleaning water is ejected from any one of the buttocks nozzle 1, the bidet nozzle 2, and the nozzle cleaning nozzle 3. Further, the switching valve 14 adjusts the flow rate of the cleaning water ejected from the nozzle unit 30 based on the control signal given by the control unit 4. As a result, the flow rate of the cleaning water ejected from the nozzle unit 30 changes.
[0056]
The control unit 4 uses the water stop electromagnetic valve 9 and the heat exchange based on the signal wirelessly transmitted from the remote control device 300 of FIG. 1, the measured flow rate value given from the flow sensor 10 and the temperature measured value given from the temperature sensors 12a and 12b. A control signal is given to the vessel 11, the pump 13 and the switching valve 14.
[0057]
FIG. 4 is a partially cutaway cross-sectional view showing an example of the structure of the heat exchanger 11.
As shown in FIG. 4, a meandering pipe 510 bent in a resin case 504 is embedded. A flat ceramic heater 505 is provided so as to contact the meandering pipe 510. As indicated by an arrow Y, cleaning water is supplied from the water supply port 511 into the meandering pipe 510, and is efficiently heated by the ceramic heater 505 while flowing through the meandering pipe 510, and is discharged from the discharge port 512.
[0058]
The control unit 4 in FIG. 3 feedback-controls the temperature of the ceramic heater 505 of the heat exchanger 11 based on the temperature measurement value given from the temperature sensor 12b.
[0059]
In the present embodiment, the control unit 4 controls the temperature of the ceramic heater 505 of the heat exchanger 11 by feedback control. However, the present invention is not limited to this, and the temperature of the ceramic heater 505 is controlled by feedforward control. Alternatively, the ceramic heater 505 may be controlled by feedforward control when the temperature rises, and complex control may be performed in which the ceramic heater 505 is controlled by feedback control in a steady state.
[0060]
FIG. 5 is a cross-sectional view showing an example of the structure of the pump 13. The pump in FIG. 5 is a double-acting reciprocating pump.
[0061]
In FIG. 5, a cylindrical space 139 is formed in the main body 138. A pressure feeding piston 136 is provided in the cylindrical space 139. An X-shaped packing 136 a is attached to the outer peripheral portion of the pressure feeding piston 136. The cylindrical space 139 is divided into a pump chamber 139a and a pump chamber 139b by the pressure feed piston 136.
[0062]
A cleaning water inlet PI is provided on one side of the main body 138, and a cleaning water outlet PO is provided on the other side. The heat exchanger 11 is connected to the cleaning water inlet PI via the pipe 203 in FIG. 3, and the switching valve 14 is connected to the cleaning water outlet PO via the pipe 203.
[0063]
The cleaning water inlet PI communicates with the pump chamber 139a via the internal flow path P1, the small chamber S1, and the small chamber S3, and communicates with the pump chamber 139b via the internal flow path P2, the small chamber S2, and the small chamber S4.
[0064]
The pump chamber 139a communicates with the washing water outlet PO through the small chamber S5, the small chamber S7, and the internal flow path P3. The columnar space 139b communicates with the washing water outlet PO through the small chamber S6, the small chamber S8, and the internal flow path P4.
[0065]
An umbrella packing 137 is provided in each of the small chamber S3, the small chamber S4, the small chamber S7, and the small chamber S8.
[0066]
A gear 131 is attached to the rotation shaft of the motor 130, and the gear 132 is engaged with the gear 131. Further, one end of the crankshaft 133 is attached to the gear 132 so as to be rotatable at one point support, and a pressure feed piston 136 is attached to the other end of the crankshaft 133 via a piston holding part 134 and a piston holding bar 135. ing.
[0067]
When the rotating shaft of the motor 130 rotates based on the control signal given by the control unit 4 in FIG. 3, the gear 131 attached to the rotating shaft of the motor 130 rotates in the direction of the arrow R1, and the gear 132 moves in the direction of the arrow R2. Rotate in the direction. Thereby, the pumping piston 136 moves up and down in the direction of the arrow Z in the drawing.
[0068]
FIG. 6 is a schematic diagram for explaining the operation of the umbrella packing 137. For example, when the pumping piston 136 in FIG. 5 moves downward and increases the volume of the pump chamber 139a, the pressure in the pump chamber 139a becomes lower than the pressure in the small chamber S1, so that the pressure feeding piston 136 is provided in the small chamber S3. The umbrella packing 137 is deformed as shown in FIG. As a result, the cleaning water supplied from the cleaning water inlet PI flows into the pump chamber 139a through the internal flow path P1, the small chamber S1, and the small chamber S3. In this case, since the pressure in the pump chamber 139a is lower than the pressure in the small chamber S7, the umbrella packing 137 provided in the small chamber S7 is not deformed in the state shown in FIG. Therefore, the cleaning water does not flow into the pump chamber 139a and conversely is not discharged from the cleaning water outlet PO.
[0069]
On the other hand, when the pumping piston 136 of FIG. 5 moves upward and reduces the volume of the pump chamber 139a, the pressure in the pump chamber 139a becomes higher than the pressure in the small chamber S1, so that the pumping piston 136 is provided in the small chamber S3. The umbrella packing 137 is not deformed in the state shown in FIG. As a result, the cleaning water in the small chamber S1 does not flow into the pump chamber 139a. In this case, the umbrella packing 137 provided in the small chamber S7 is deformed as shown in FIG. Therefore, the cleaning water in the pump chamber 139a is discharged from the cleaning water outlet PO through the small chamber S5, the small chamber S7, and the internal flow path P3.
[0070]
The umbrella packing 137 provided in the small chamber S4 is deformed as shown in FIG. 6B when the pressure feed piston 136 moves upward, and when the pressure feed piston 136 moves downward, It does not deform in the state shown in FIG. On the other hand, the umbrella packing 137 provided in the small chamber S8 is not deformed in the state shown in FIG. 6A when the pumping piston 136 moves upward, and when the pumping piston 136 moves downward. Then, it is deformed as shown in FIG. Thereby, when the cleaning water in the pump chamber 139a is discharged from the cleaning water outlet PO, the cleaning water from the cleaning water inlet PI flows into the pump chamber 139b, and the cleaning water inlet PI enters the pump chamber 139a. When the cleaning water flows in, the cleaning water in the pump chamber 139b is discharged from the cleaning water outlet PO.
[0071]
FIG. 7 is a view showing a pressure change of the pump 13 of FIG. The vertical axis in FIG. 7 indicates pressure, and the horizontal axis indicates time.
[0072]
As shown in FIG. 7, cleaning water having a pressure Pi is supplied to the cleaning water inlet PI of the pump 13. In this case, the pressure Pa of the cleaning water in the pump chamber 139a changes as indicated by a dotted line by the vertical movement of the pumping piston 136 of FIG. On the other hand, the pressure Pb of the washing water in the pump chamber 139b changes as shown by a broken line. The pressure Pout of the cleaning water discharged from the cleaning water outlet PO of the pump 13 periodically changes up and down around the pressure Pc, as shown by a thick solid line.
[0073]
As described above, in the pump 13, the pressure feed piston 136 moves up and down, whereby pressure is alternately applied to the cleaning water in the pump chamber 139a or the pump chamber 139b, and the cleaning water at the cleaning water inlet PI is boosted. And discharged from the washing water outlet PO.
[0074]
8A is a longitudinal sectional view of the switching valve 14, FIG. 8B is a sectional view taken along the line AA of the switching valve 14 of FIG. 8A, and FIG. FIG. 8A is a sectional view taken along line B-B of the switching valve 14 in FIG. 8A, and FIG. 8D is a sectional view taken along line C-C of the switching valve 14 in FIG.
[0075]
The switching valve 14 shown in FIG. 8 includes a motor 141, an inner cylinder 142, and an outer cylinder 143.
[0076]
An inner cylinder 142 is inserted into the outer cylinder 143, and a rotation shaft of the motor 141 is attached to the inner cylinder 142. The motor 141 performs a rotation operation based on a control signal given by the control unit 4. As the motor 141 rotates, the inner cylinder 142 rotates.
[0077]
As shown in FIGS. 8 (a), (b), (c), and (d), a washing water inlet 143a is provided at one end of the outer cylinder 143, and the washing water outlet 143b, 143c is provided, a cleaning water outlet 143d is provided at a position different from the side cleaning water outlets 143b, 143c, and a cleaning water outlet 143e is provided at a position different from the side cleaning water outlets 143b, 143c, 143d. . Holes 142e, 142f, 142g are provided at different positions of the inner cylinder 142. As shown in FIGS. 8B and 8C, a chamfered portion formed of a curve and a straight line is formed around the holes 142e and 142f, and the hole 142g is shown in FIG. 8D. Thus, the chamfered part comprised by a straight line is formed.
[0078]
By rotation of the inner cylinder 142, the hole 142e can face the cleaning water outlet 143b or 143c of the outer cylinder 143, the hole 142f can face the cleaning water outlet 143d of the outer cylinder 143, and the hole 142g The outer cylinder 143 can face the cleaning water outlet 143e.
[0079]
The pipe 203 of FIG. 3 is connected to the cleaning water inlet 143a, the bidet nozzle 2 is connected to the cleaning water outlet 143b, and the first flow path of the butt nozzle 1 is connected to the cleaning water outlet 143c. The second flow path of the buttocks nozzle is connected to the water outlet 143d, and the nozzle cleaning nozzle 3 is connected to the cleaning water outlet 143e.
[0080]
FIG. 9 is a cross-sectional view showing the operation of the switching valve 14 of FIG.
FIGS. 9A to 9F show a state in which the motor 141 of the switching valve 14 has rotated 0 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, and 270 degrees, respectively.
[0081]
First, as shown in FIG. 9A, when the motor 141 is not rotated (0 degree), the chamfered portion around the hole 142 e of the inner cylinder 142 faces the cleaning water outlet 143 b of the outer cylinder 143. Accordingly, the washing water passes through the inside of the inner cylinder 142 from the washing water inlet 143a and flows out from the washing water outlet 143b as indicated by the arrow W1.
[0082]
Next, as shown in FIG. 9B, when the motor 141 rotates the inner cylinder 142 by 90 degrees, the chamfered portion around the hole 142 g of the inner cylinder 142 becomes the cleaning water outlet 143 e of the outer cylinder 143. opposite. Accordingly, the washing water passes through the inside of the inner cylinder 142 from the washing water inlet 143a and flows out from the washing water outlet 143e as indicated by an arrow W2.
[0083]
Next, as shown in FIG. 9C, when the motor 141 rotates the inner cylinder 142 by 135 degrees, a part of the chamfered portion around the hole 142 g of the inner cylinder 142 is the washing water outlet of the outer cylinder 143. While facing 143e, a part of the chamfered portion around the hole 142e of the inner cylinder 142 faces the washing water outlet 143c of the outer cylinder 143. Accordingly, a small amount of washing water passes through the inside of the inner cylinder 142 from the washing water inlet 143a and flows out from the washing water outlets 143c and 143e as indicated by arrows W2 and W3.
[0084]
Next, as shown in FIG. 9 (d), when the motor 141 rotates the inner cylinder 142 by 180 degrees, the chamfered portion around the hole 142 e of the inner cylinder 142 becomes the washing water outlet 143 c of the outer cylinder 143. opposite. Accordingly, the washing water passes through the inside of the inner cylinder 142 from the washing water inlet 143a and flows out from the washing water outlet 143c as indicated by an arrow W3.
[0085]
Next, as shown in FIG. 9 (e), when the motor 141 rotates the inner cylinder 142 by 225 degrees, a part of the chamfered portion around the hole 142 e of the inner cylinder 142 is washed water of the outer cylinder 143. While facing the outlet 143 c, a part of the chamfered portion around the hole 142 f of the inner cylinder 142 faces the cleaning water outlet 143 d of the outer cylinder 143. Accordingly, a small amount of cleaning water passes through the inner cylinder 142 from the cleaning water inlet 143a and flows out from the cleaning water outlets 143c and 143d as indicated by arrows W3 and W4.
[0086]
Further, as shown in FIG. 9 (f), when the motor 141 rotates the inner cylinder 142 by 270 degrees, the chamfered portion around the hole 142 f of the inner cylinder 142 faces the cleaning water outlet 143 d of the outer cylinder 143. To do. Accordingly, the washing water passes through the inside of the inner cylinder 142 from the washing water inlet 143a and flows out from the washing water outlet 143d as indicated by an arrow W4.
[0087]
As described above, when the motor 141 rotates based on the control signal from the control unit 4, any of the holes 142e, 142f, 142g of the inner cylinder 142 faces the cleaning water outlets 143b to 143e of the outer cylinder 143, The washing water that has flowed in from the washing water inlet 143a flows out from any of the washing water outlets 143b to 143e.
[0088]
FIG. 10 is a diagram showing the flow rate of the wash water flowing out from the wash water outlets 143c and 143d of the switching valve 14 in FIG. The horizontal axis in FIG. 10 indicates the rotation angle of the motor 141, and the vertical axis indicates the flow rate of the cleaning water flowing through the cleaning water outlets 143c and 143d. A one-dot chain line Q1 indicates a change in the flow rate of the wash water flowing out from the wash water outlet 143c, and a solid line Q2 indicates a change in the flow rate of the wash water flowing out from the wash water outlet 143d.
[0089]
For example, as shown in FIG. 10, when the motor 141 rotates 180 degrees, the flow rate of the cleaning water flowing out from the cleaning water outlet 143c shows the maximum value, and the cleaning water does not flow out from the cleaning water outlet 143d. As the rotation angle of the motor 141 increases, the flow rate of the cleaning water flowing out from the cleaning water outlet 143c decreases, and the flow rate of the cleaning water flowing out from the cleaning water outlet 143d increases. When the motor 141 rotates 270 degrees, the washing water does not flow out from the washing water outlet 143c, and the flow rate of the washing water flowing out from the washing water outlet 143d shows the maximum value.
[0090]
As described above, the control unit 4 can control the flow rate ratio of the cleaning water flowing out from the cleaning water outlets 143c and 143d by controlling the rotation angle of the motor 141 of the switching valve 14.
[0091]
Next, the bottom nozzle 1 of the nozzle unit 30 in FIG. 3 will be described. FIG. 11 is a perspective view of the piston portion 20 of the butt nozzle 1 of the nozzle portion 30, and FIG. 12 is an exploded perspective view of the piston portion 20.
[0092]
As shown in FIG. 11, the piston part 20 of the buttocks nozzle 1 includes a nozzle cover 401, a two-flow path pipe 402, a single-flow path pipe 403, and a flow path joining section 404. In FIG. 11, the nozzle cover 401 is indicated by a broken line. As shown in FIG. 12, an ejection hole 401 a is provided on the upper surface of the tip portion of the nozzle cover 401.
[0093]
The two-channel pipe 402 has two channels through which cleaning water flows. One channel is connected to the rear end of one channel tube 403, and the channel merging portion 404 is connected to the tip of one channel tube 403. Further, as shown in FIG. 11, the nozzle cover 401 covers the two flow path pipes 402, the one flow path pipe 403, and the flow path joining portion 404.
[0094]
The washing water supplied to one flow path of the two flow path pipes 402 is supplied to the flow path junction 404 through the one flow path pipe 403. The washing water supplied to the other flow path of the two flow path pipe 402 passes through the space between the one flow path pipe 403 and the nozzle cover 401 and is supplied to the flow path junction 404. The washing water supplied to the flow path junction 404 is ejected from the ejection hole 401a toward the human body. The washing water ejected at this time becomes a dispersed swirl flow. Details will be described later.
[0095]
FIG. 13A is a side view of the piston portion 20, and FIG. 13B is a plan view of the piston portion 20.
[0096]
As shown in FIGS. 13A and 13B, the nozzle cover 401 has a cylindrical structure with the tip closed in a hemispherical shape, and has a seamless integrated structure. A flat surface is partially formed on the top of the tip of the nozzle cover 401, and an ejection hole 401a is formed at the center of the flat surface. The nozzle cover 401 is formed by drawing stainless steel.
[0097]
Since the nozzle cover 401 has no seam, even if dirt is attached to the nozzle cover 401, it is easy to wash away and is hygienic. Further, since stainless steel has an antibacterial action, bacteria do not propagate on the surface of the nozzle cover 401.
[0098]
In addition, since the nozzle cover 401 is made of stainless steel, the nozzle cover 401 can be thinned while ensuring the strength of the nozzle cover 401, and the butt nozzle 1 can be downsized. In this case, even if pressurized washing water is supplied into the nozzle cover 401, it does not deform. The nozzle cover 401 has a tube diameter of, for example, 10 mm and a wall thickness of, for example, about 0.2 mm.
[0099]
Further, since the nozzle cover 401 is formed by drawing, the surface is not rough and dirt is difficult to adhere. Moreover, the surface of the nozzle cover 401 becomes glossy, and the user feels clean.
[0100]
FIG. 14 is a cross-sectional view of the buttocks nozzle 1.
As shown in FIG. 14, the buttocks nozzle 1 includes a piston portion 20, a cylindrical cylinder portion 21, seal packings 22 a and 22 b, and a spring 23.
[0101]
A hole 25 for ejecting cleaning water is formed on the upper surface of the flow path junction 404. Flange-shaped stopper portions 26 a and 26 b are provided at the rear end of the piston portion 20. Further, seal packings 22a and 22b are attached to the stopper portions 26a and 26b, respectively.
[0102]
A flow path 27a communicating with the one flow path pipe 403 from the rear end surface is formed inside the two flow path pipe 402, and the tip of the two flow path pipe 402 is formed from the peripheral surface of the piston portion 20 between the stopper portion 26a and the stopper portion 26b. A flow path 27c communicating with the surface is formed.
[0103]
A flow path 27 b that communicates from the flow path 27 a of the two flow path pipe 402 to the flow path junction 404 is formed inside the single flow path pipe 403. A space between the nozzle cover 401 and the one flow pipe 403 is a flow path 27d. Details of the flow path junction 404 will be described later.
[0104]
On the other hand, the cylinder portion 21 includes a small-diameter portion on the front end side, an intermediate portion having an intermediate diameter, and a large-diameter portion on the rear end side. Thereby, a stopper surface 21c on which the stopper portion 26a of the piston portion 20 can abut via the seal packing 22a is formed between the small diameter portion and the intermediate portion, and between the intermediate portion and the large diameter portion, A stopper surface 21b is formed on which the stopper portion 26b of the piston portion 20 can abut via the seal packing 22b.
[0105]
A cleaning water inlet 24 a is provided on the rear end surface of the cylinder portion 21, a cleaning water inlet 24 b is provided on the peripheral surface of the intermediate portion of the cylinder portion 21, and an opening 21 a is provided on the tip surface of the cylinder portion 21. Is provided. The internal space of the cylinder part 21 becomes the temperature fluctuation buffer part 28. The cleaning water inlet 24 a is provided eccentrically at a position different from the central axis of the cylinder portion 21.
[0106]
The washing water inlet 24a is connected to the washing water outlet 143d of the switching valve 14 in FIG. 8, and the washing water inlet 24b is connected to the washing water outlet 143c of the switching valve 14 in FIG. When the piston part 20 protrudes most from the cylinder part 21, the cleaning water inlet 24 b communicates with the flow path 27 c of the two flow path pipe 402. Details of the operation when the washing water inlet 24b is connected to the flow path 27c will be described later.
[0107]
The piston part 20 is movably inserted into the cylinder part 21 so that the stopper part 26b is positioned in the temperature fluctuation buffer part 28 and the tip part protrudes from the opening part 21a.
[0108]
Further, the spring 23 is disposed between the stopper portion 26 a of the piston portion 20 and the periphery of the opening portion 21 a of the cylinder portion 21, and biases the piston portion 20 toward the rear end side of the cylinder portion 21.
[0109]
A minute gap is formed between the outer peripheral surfaces of the stopper portions 26a and 26b of the piston portion 20 and the inner peripheral surface of the cylinder portion 21, and the outer peripheral surface of the piston portion 20 and the inner peripheral surface of the opening portion 21a of the cylinder portion 21 are formed. A minute gap is formed between them.
[0110]
Next, the operation of the buttocks nozzle 1 in FIG. 14 will be described. FIG. 15 is a cross-sectional view for explaining the operation of the buttocks nozzle 1 in FIG.
[0111]
First, as shown in FIG. 15 (a), when the cleaning water is not supplied from the cleaning water inlets 24 a and 24 b of the cylinder part 21, the piston part 20 moves backward in the direction opposite to the direction of the arrow X by the elastic force of the spring 23. And is accommodated in the cylinder portion 21. As a result, the piston part 20 is in a state in which it does not protrude the most from the opening part 21 a of the cylinder part 21. At this time, the temperature fluctuation buffer portion 28 is not formed in the cylinder portion 21.
[0112]
Next, as shown in FIG. 15 (b), when the supply of cleaning water is started from the cleaning water inlet 24 a of the cylinder portion 21, the piston portion 20 resists the elastic force of the spring 23 due to the pressure of the cleaning water. Gradually advance in the X direction. As a result, the temperature fluctuation buffer 28 is formed in the cylinder part 21 and the washing water flows into the temperature fluctuation buffer 28.
[0113]
Since the cleaning water inlet 24 a is provided at a position that is eccentric with respect to the central axis of the cylinder portion 21, the cleaning water that has flowed into the temperature fluctuation buffer portion 28 circulates in a spiral shape as indicated by an arrow V. Part of the washing water in the temperature fluctuation buffer portion 28 passes through a minute gap between the outer peripheral surface of the stopper portions 26a and 26b of the piston portion 20 and the inner peripheral surface of the cylinder portion 21, and the outer peripheral surface of the piston portion 20 and the cylinder portion. 21 flows out from a minute gap between the inner peripheral surface of the opening portion 21a and is supplied to the flow passage merging portion 404 through the flow passages 27a, 27b, 27c, and 27d of the piston portion 20, and is slightly ejected from the hole portion 25. The
[0114]
When the piston portion 20 further advances, the stopper portions 26a and 26b come into watertight contact with the stopper surfaces 21c and 21b of the cylinder portion 21 through the seal packings 22a and 22b, as shown in FIG. As a result, a small gap between the outer peripheral surfaces of the stopper portions 26a and 26b of the piston portion 20 and the inner peripheral surface of the cylinder portion 21 causes the outer peripheral surface of the piston portion 20 and the inner peripheral surface of the opening portion 21a of the cylinder portion 21 to The flow path leading to the minute gap is blocked.
[0115]
Further, the cleaning water supplied from the cleaning water inlet 24 b is supplied to the flow path junction 404 through the flow paths 27 c and 27 d of the piston portion 20. As a result, the cleaning water supplied to the flow path junction 404 through the flow paths 27a and 27b is mixed with the cleaning water supplied through the flow paths 27c and 27d and ejected from the hole 25.
[0116]
FIG. 16 is a diagram for explaining the flow path junction 404. 16 (a) is a plan view of the tip portion of the piston portion 20, FIG. 16 (b) is a sectional view taken along the line DD of FIG. 16 (a), and FIG. 16 (c) is FIG. It is the EE sectional view taken on the line.
[0117]
As shown in FIG. 16A, the ejection hole 401 a is formed so as to have a larger diameter than the hole portion 25. Thereby, the washing water ejected from the hole 25 does not hit the ejection hole 401a, and the ejection of the washing water is not hindered.
[0118]
As shown in FIG. 16B, an annular groove 404a is formed at the upper part of the flow path converging portion 404 so as to surround the hole 25, and an O-ring 404b is attached to the groove 404a. The O-ring 404b and the inner peripheral surface of the nozzle cover 401 are in close contact with each other, and the cleaning water in the flow path 27d does not flow out from the ejection hole 401a of the nozzle cover 401. Even if dirt is attached to the tip of the nozzle cover 401, the dirt does not directly enter the flow path 27d from the ejection hole 401a.
[0119]
Even if dirt enters the hole 25 from the ejection hole 401 a of the nozzle cover 401, the dirt is immediately discharged by the cleaning water ejected from the hole 25. Thereby, the inside of the nozzle cover 401 is always kept clean.
[0120]
A position fixing piece 404 c is formed at the tip of the flow path converging portion 404. By supporting the tip of the position fixing piece 404 c on the inner peripheral surface of the tip of the nozzle cover 401, the position of the flow path merge portion 404 is fixed.
[0121]
Inside the flow path merging portion 404, a hole 25, a contracted portion 25a, a cylindrical vortex chamber 25b, and a contracted portion 25c are formed in order from the upper end to the lower end of the flow path merging portion 404.
[0122]
The washing water in the flow path 27d is supplied to the cylindrical vortex chamber 25b through the contracted portion 25c. Since the inner diameter of the contracted portion 25c continuously decreases toward the cylindrical vortex chamber 25b, the flow rate of the washing water flowing through the contracted portion 25c continuously increases.
[0123]
The washing water supplied to the cylindrical vortex chamber 25b flows into the contracted portion 25a. Since the inner diameter of the contracted portion 25a continuously decreases toward the hole 25, the flow rate of the washing water flowing through the contracted portion 25a increases continuously. The washing water supplied to the hole 25 is ejected toward the human body.
[0124]
As shown in FIG. 16C, the cylindrical vortex chamber 25b and the flow path 27b communicate with each other. As will be described later, the cleaning water supplied from the flow path 27b applies a swirling force to the cleaning water supplied from the flow path 27d to the cylindrical vortex chamber 25b in the cylindrical vortex chamber 25b to generate a swirling flow.
[0125]
Here, the flow velocity of the swirling flow flowing inside the cylinder will be described. FIG. 17A is a schematic diagram for explaining the flow velocity of the swirling flow inside the cylinder.
[0126]
It is assumed that the swirl flow that flows inside the cylinder of FIG. 17A is in a steady state. As shown in FIG. 17A, the fluid flowing inside the cylinder flows concentrically with respect to the center of the cylinder. The flow velocity of the swirl flow is zero at the center of the cylinder, and the flow velocity of the swirl flow increases in proportion to the distance from the center, and the swirl flow forms a vortex having no vorticity.
[0127]
However, the swirling flow is resisted by the inner peripheral surface of the cylinder in the region outside the boundary near the inner peripheral surface of the cylinder. Hereinafter, this boundary is referred to as a laminar flow limit BL. A so-called boundary layer is formed outside the laminar flow limit BL, and the flow velocity of the swirling flow decreases rapidly, and becomes zero on the inner peripheral surface of the cylinder. Therefore, the flow velocity of the swirl flow becomes maximum at the laminar flow limit BL.
[0128]
FIG. 17B is a schematic diagram for explaining the swirling flow of the cleaning water in the cylindrical vortex chamber 25b. In FIG. 17B, the flow of cleaning water is indicated by an arrow Q1. As shown in FIG. 17 (b), the flow path 27b is an extension of the outer wall of the flow channel 27b communicates with the cylindrical swirl chamber 25b so as to form a tangent to the laminar flow limit BL. Thereby, the washing water supplied from the flow path 27b can give a turning force to the washing water without receiving the resistance of the inner peripheral surface of the cylindrical vortex chamber 25b. Moreover, since the washing water supplied from the flow path 27b gives a turning force to the outermost periphery of the vortex having no vorticity formed in the cylindrical vortex chamber 25b, the vortex having no vorticity is not disturbed.
[0129]
Further, as shown in FIG. 16B, since the cylindrical vortex chamber 25b does not have a bottom surface, the resistance received by the swirling flow flowing through the cylindrical vortex chamber 25b is reduced.
[0130]
From the above, in the cylindrical vortex chamber 25b in the present embodiment, the washing water can be swirled without disturbing the vortex having low flow resistance and no vorticity.
[0131]
Next, a change in the cross-sectional area of the flow path through which the washing water supplied to the buttocks nozzle 1 flows will be described with reference to FIGS. 18 and 19.
[0132]
18 is a cross-sectional view of the tip portion of the buttocks nozzle 1, FIG. 19A is a cross-sectional view taken along the line XX of FIG. 18, and FIG. FIG. 19C is a cross-sectional view taken along the line ZZ in FIG.
[0133]
As shown in FIG. 19A, the cross-sectional area S1 indicates the cross-sectional area of the hole 25. As shown in FIG. 19B, the cross-sectional area S2 indicates the cross-sectional area of the cylindrical vortex chamber 25b. As shown in FIG. 19C, the cross-sectional area S <b> 3 of the flow path 27 d is a cross-sectional area of an area obtained by removing the one flow path pipe 403 from the space inside the nozzle cover 401. A relationship of S1 <S2 <S3 is established between the cross-sectional areas S1, S2, and S3.
[0134]
Since the cross-sectional area S3 of the flow path 27d is relatively large, the pressure loss of the washing water flowing through the flow path 27d is reduced. Accordingly, the cleaning water maintains a high pressure until the cleaning water is supplied to the flow path merge unit 404.
[0135]
Further, since the cross-sectional area gradually decreases in the order of the flow path 27d, the contracted flow part 25c, the cylindrical vortex chamber 25b, the contracted flow part 25a, and the hole 25, the flow path loss is small and the pressure loss of the washing water is reduced. Less. Thereby, the water force at the time when the washing water is ejected from the hole 25 is increased, which is efficient.
[0136]
Assuming that the diameter of the hole 25 is d1 and the diameter of the cylindrical vortex chamber 25b is d2, d2 / d1 is preferably about 2 to 5. Thereby, the flow rate of the washing water ejected from the hole 25 can be increased while reducing the flow path loss.
[0137]
In the buttocks nozzle 1 according to the present embodiment, since the cylindrical space between the inner peripheral surface of the nozzle cover 401 and the one flow pipe 403 is used as a flow path for the washing water, the piston portion 20 is used. The cross-sectional area of the washing water flow path can be increased while downsizing.
[0138]
FIG. 20 is a schematic cross-sectional view of the front end portion of the piston portion 20 as viewed from the side surface side.
[0139]
As shown in FIG. 20, the channel 27d communicates with the contracted portion 25c from below, and the channel 27b communicates with the peripheral surface of the cylindrical cylindrical vortex chamber 25b. Wash water from the wash water outlet 143c of the switching valve 14 is supplied to the contracted portion 25c through the flow paths 27c and 27d, and is ejected as a straight flow from the hole 25 through the cylindrical vortex chamber 25b and the contracted portion 25a. Is done. The washing water from the washing water outlet 143d of the switching valve is supplied to the cylindrical vortex chamber 25b through the flow paths 27a and 27b, and is ejected from the hole 25 through the contracted portion 25a.
[0140]
The washing water supplied from the flow path 27b to the cylindrical vortex chamber 25b flows in a spiral state due to the curved shape of the inner peripheral surface of the cylindrical vortex chamber 25b as described in FIG. 19, and is supplied from the flow path 27d. Swir the wash water.
[0141]
In this way, in the cylindrical vortex chamber 25b, the cleaning water from the flow path 27b is swirled by the cleaning water from the flow path 27d, and the swirled cleaning water is ejected from the hole 25.
[0142]
For example, when the flow rate of the cleaning water supplied from the flow path 27b is higher than the flow rate of the cleaning supplied from the flow path 27d, the cleaning water mixed in the cylindrical vortex chamber 25b is a cylindrical cylindrical vortex chamber 25b. In order to strongly maintain the spiral state due to the curved surface shape, as shown by an arrow H in FIG.
[0143]
On the other hand, when the flow rate of the wash water supplied from the flow path 27d is larger than the flow rate of the wash water supplied from the flow path 27b, the wash water mixed in the cylindrical vortex chamber 25b strongly maintains a linear state. As shown by an arrow S in FIG. 20, it is ejected as a linear flow at a narrow angle.
[0144]
Therefore, the control unit 4 in FIG. 3 controls the motor 141 of the switching valve 14 to change the flow rate ratio of the cleaning water outlets 143c and 143d, thereby changing the jet form of the cleaning water jetted from the hole 25.
[0145]
In addition, as described with reference to FIG. 17, the swirl flow generated in the cylindrical vortex chamber 25b is a vortex with less turbulence, so that the washing water ejected from the hole 25 is turbulent that spreads out uniformly. Form a circle without Moreover, as shown in FIG. 20, the jet of the wash water ejected from the hole 25 forms a cross section where the wash water exists uniformly from the center to the outer periphery even when the spread angle is large.
[0146]
In the present embodiment, when the water pressure adjustment switch 302a in FIG. 2 is pressed, the flow rate of the cleaning water outlet 143c becomes larger than the flow rate of the cleaning water outlet 143d, and the jet form of the cleaning water approaches a linear flow. Further, when the water flow adjustment switch 302b is pressed, the flow rate of the cleaning water outlet 143d becomes larger than the flow rate of the cleaning water outlet 143c, and the ejection form of the cleaning water approaches the dispersed swirl flow.
[0147]
In addition, for example, since the fluid pressure is held by the nozzle cover 401 for the connection between the one flow path pipe 403 and the flow path merging portion 404, the demand for the air density is low. Therefore, the butt nozzle 1 can be easily assembled.
[0148]
FIG. 21 is a diagram for explaining the pressure fluctuation range of the cleaning water ejected from the hole 25 of the posterior nozzle 1.
[0149]
A dotted line P1 in FIG. 21 indicates the pressure fluctuation range of the cleaning water when the nozzle cover 401 is formed of an elastic material (for example, plastic). When the nozzle cover 401 of the buttocks nozzle 1 is made of an elastic material, the pressure of the cleaning water pressurized by the pump 13 is absorbed by the nozzle cover 401, the pressure of the cleaning water decreases, and the pressure fluctuation range descend.
[0150]
On the other hand, since the nozzle cover 401 in the present embodiment is made of stainless steel, the pressure fluctuation width of the cleaning water is not reduced because the pressure of the cleaning water is not absorbed by the nozzle cover 401.
[0151]
Here, when the nozzle cover 401 is formed of an elastic material, the maximum pressure of the cleaning water is Pn3, the pressure fluctuation range is dH2, and the maximum cleaning water when the nozzle cover 401 is formed of stainless steel. When the pressure is Pn1 and the pressure fluctuation range is dH1, the relationship of Pn1> Pn3 and dH1> dH2 is established.
[0152]
Therefore, by configuring the nozzle cover 401 with stainless steel, the pressure pressurized by the pump 13 on the cleaning water can be efficiently used.
[0153]
The nozzle cover 401 according to the present embodiment can be made of stainless steel with high antibacterial properties containing copper or silver. In addition, a material that is difficult to deform and can be integrally formed can be used. For example, metals other than stainless steel such as copper, aluminum, nickel, and chromium may be used, and other alloys may be used.
[0154]
In the present embodiment, the flow path confluence portion 204 corresponds to the ejection member, the contracted portion 25c corresponds to the opening and the first space, and the cylindrical vortex chamber 25b corresponds to the second cylindrical space. The contracted portion 25a corresponds to the third space, the flow path 27d corresponds to the first flow path, the flow path 27a corresponds to the second flow path, the nozzle cover 401 corresponds to the cover member, One flow pipe 403 corresponds to a pipe line, O-ring 402b corresponds to a seal member, pump 13 corresponds to a pressurizing means, switching valve 14 corresponds to a path selection means and a flow rate adjusting means, and ceramic heater 505 Corresponds to heating means.
[0155]
【The invention's effect】
In the nozzle device according to the present invention, a linear jet having a high flow velocity is efficiently ejected. Therefore, the cleaning water can be efficiently ejected. In addition, since the ejection space has a structure that gradually or continuously decreases to the ejection holes, the nozzle device can be reduced in size.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a sanitary washing device according to the present embodiment is mounted on a toilet. FIG. 2 is a schematic diagram showing an example of the remote control device in FIG. 1. FIG. FIG. 4 is a partially cutaway sectional view showing an example of the structure of the heat exchanger. FIG. 5 is a sectional view showing an example of the structure of the pump. FIG. 7 is a schematic diagram for explaining the operation. FIG. 7 is a diagram showing a pressure change of the pump of FIG. 5. FIG. 8A is a longitudinal sectional view of a switching valve, and FIG. It is AA sectional view, (c) is BB sectional drawing of the switching valve of (a), (d) is CC sectional drawing of the switching valve of (a). FIG. 10 is a cross-sectional view showing the operation of the switching valve in FIG. 8. FIG. 10 is a diagram showing the flow rate of cleaning water flowing out from the cleaning water outlet of the switching valve in FIG. FIG. 12 is an exploded perspective view of the piston portion. FIG. 13A is a side view of the piston portion 20, and FIG. 14B is a plan view of the piston portion. FIG. FIG. 15 is a cross-sectional view for explaining the operation of the buttocks nozzle of FIG. 14. FIG. 16 is a view for explaining the flow path merging portion. FIG. 17 (a) shows the flow velocity of the swirling flow inside the cylinder. FIG. 18B is a schematic diagram for explaining the swirling flow of the washing water in the cylindrical vortex chamber. FIG. 18 is a cross-sectional view of the tip of the butt nozzle. FIG. Fig. 20 is a cross-sectional view taken along line -X, (b) is a cross-sectional view taken along line Y-Y in Fig. 18, and (c) is a cross-sectional view taken along line ZZ in Fig. 18. Fig. 21 is a schematic cross-sectional view when seen. Diagram for [description of the code]
DESCRIPTION OF SYMBOLS 1 Butt nozzle 4 Control part 14 Switching valve 25 Hole 25a Shrinking part 25b Cylindrical vortex chamber 25c Shrinking part 27a, 27b, 27c, 27d Flow path 30 Nozzle part 200 Main part 401 Nozzle cover 401a Ejection hole 402 Two flow path pipe 403 One channel pipe 404 Channel junction 404a Groove 404b O-ring 404c Position fixing piece BL Laminar flow limit S1, S2, S3 Channel cross-sectional area 300 Remote control device

Claims (15)

A nozzle device for ejecting washing water,
An ejection member that forms an ejection space having an opening on one end side and a hole on the other end side;
A first flow path for guiding cleaning water to the ejection space from the opening side;
A second flow path for guiding the wash water from the peripheral surface side to the ejection space ;
A conduit forming the second flow path;
A cylindrical cover member provided so as to surround the outer periphery of the conduit,
The first flow path is formed by a space between an inner peripheral surface of the cover member and an outer peripheral surface of the pipe line,
The ejection space includes a first space having a first inner diameter from the opening side to the hole side, a second cylindrical space having a second inner diameter smaller than the first inner diameter, and the second A third space having a third inner diameter smaller than the inner diameter of the cylindrical space of
The second flow channel and the second cylinder are arranged such that an extension line of the inner wall on the outer side of the second flow channel coincides with a tangential line of a concentric circle inside the inner peripheral surface of the second cylindrical space. Nozzle device characterized by communicating with a space.   The nozzle apparatus according to claim 1, wherein the first space has an inner diameter that continuously decreases from the opening to the second cylindrical space.   The nozzle apparatus according to claim 1, wherein the third space has an inner diameter that continuously decreases from the second cylindrical space to the hole.   The nozzle device according to claim 1, wherein an inner diameter of the second cylindrical space is 2 to 5 times an inner diameter of the hole.   The nozzle device according to claim 1, wherein a cross-sectional area of the first flow path is larger than a cross-sectional area of the opening of the ejection space. The tip portion of the cover member, a nozzle device according to claim 1, characterized in that closed in a substantially hemispherical inner circumferential surface. The cover member has a nozzle device according to claim 1, characterized in that it has a peripheral wall portion and a distal portion which is integrally formed. The cover member has a nozzle device according to claim 1, characterized in that it comprises a jet hole having an inner diameter larger than the hole. The annular sealing member which seals between the said ejection member in the circumference | surroundings of the said hole part and the said cover member in the circumference | surroundings of the said ejection hole further is provided further, The said any one of Claims 1-8 characterized by the above-mentioned. Nozzle device. The cover member has a nozzle device according to claim 1, characterized in that it is formed of a metal. A sanitary washing device that jets wash water supplied from a water supply source to a human body,
Pressurizing means for pressurizing the wash water supplied from the water supply source;
The nozzle device according to any one of claims 1 to 10 ,
Path selection means for selectively supplying cleaning water pressurized by the pressurizing means to one or both of the first flow path and the second flow path of the nozzle device. Sanitary cleaning equipment. The pressurizing means includes a reciprocating pump that pressurizes the wash water with a periodically varying pressure,
The sanitary washing apparatus according to claim 11 , further comprising a control means for controlling the operation of the reciprocating pump. The sanitary washing apparatus according to claim 11 or 12 , further comprising heating means for heating the wash water supplied from the water supply source and supplying the wash water to the pressurizing means. The sanitary washing device according to any one of claims 11 to 13 , wherein the heating means is an instantaneous heating device that heats the washing water supplied from the water supply source while flowing. The route selection means includes
The sanitary washing apparatus according to any one of claims 11 to 14 , further comprising a flow rate adjusting unit that adjusts a flow rate ratio of cleaning water supplied to the first flow path and the second flow path.

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