JPH07260019A - Water flow controller for fluid control valve and sanitary washing toilet seat - Google Patents

Abstract

PURPOSE:To attempt compactness, low costs, high durability, and a long life by enabling select-switching of a plurality of passages by single driving means having a small size and low torque and flow control in respective passages, and decreasing leakage to a part outside the specific passage. CONSTITUTION:A projecting part 65 for surrounding an outlet 63 is provided on the outlet 63 of a passage 62 provided on a valve body 61 to be rotated in a housing 57 provided with a plurality of outflow passages 59, 60, and the gap between the housing 57 and a slide-contact surface 64 is made smaller by this projecting part 65, thereby leakage from the gap on the valve body outer periphery can be remarkably decreased, and leakage to the other passage can be decreased, and select-switching of a plurality of passages and flow control in respective passages are enabled. Moreover, the slide-contact area is decreased by the projecting part 65, and also driving torque required to rotate the valve body 61 can be decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid control valve capable of switching a flow path and controlling a flow rate, and a water flow control device suitable for a sanitary washing toilet seat for cleaning a human body part after toilet.

[0002]

2. Description of the Related Art A sanitary washing toilet seat is a device intended for washing the anus after toilet, and for washing the female part during small use and menstruation. A soft feeling is required for bidet cleaning. To address this, there is a sanitary washing toilet seat with two dedicated nozzles. The following fluid control valves have been proposed to selectively switch the nozzles of these two systems.

FIG. 8 shows a sanitary washing toilet seat using a conventional fluid control valve of this type (for example, Japanese Patent Laid-Open No. 60-51237). In the figure, 1 is a water supply pump provided in a water supply passage 2 for cleaning water, 3 is a bidet cleaning nozzle for cleaning a female part, 4 is an anus cleaning nozzle for cleaning an anus, and 5 is a bidet cleaning. A fluid control valve for selecting a nozzle and an anus irrigation nozzle, and 6 is a switching knob thereof. Reference numeral 7 is a hot water tank, and 8 is a solenoid valve that works in conjunction with the cleaning knob 9.

When the washing knob 9 is turned, the solenoid valve 8 is opened and the pump 1 is operated, and the washing water is sent to the fluid control valve 5 by the water pressure of the pump 1, and by switching the fluid control valve 5, the bidet washing nozzle 3 and the anus. Cleaning water is selectively ejected from the cleaning nozzle 4 to perform bidet cleaning and anal cleaning.

The fluid control valve 5 includes a housing 13 having an inflow port 10, an outflow port 11 communicating with the bidet cleaning nozzle 3, and an outflow port 12 communicating with the anal cleaning nozzle 4, and a valve body 14 rotatable in the housing 13. And has its valve body 14
In order to seal the housing 13 and the valve body 14, an O-ring 15 and an O-ring 16 are fitted in the grooves 17 and 18, respectively. Reference numeral 19 is a valve lid, 20 is a water passage inside the valve body 14, and 21 is an outlet portion of the water passage 20.

When the washing water is supplied from the hot water tank 7 to the inflow port 10 in the above-mentioned structure, as shown in FIG. Water flows and the washing water is ejected from the bidet washing nozzle 3, and the bidet washing is performed.

When the switching knob 6 of the fluid control valve 5 is turned, the valve body 14 is rotated, and the water channel is an outlet 12 to the anus washing nozzle 4.
The washing water is jetted from the anus washing nozzle 4 in the same manner as above, and the anus washing is performed.

As described above, the cleaning nozzles 3 and 4 can be selectively switched by switching the fluid control valve 5, and the discharge flow rate can be adjusted by controlling the rotation speed of the water supply pump 1.

[0009]

However, in the conventional water flow control device as described above, if the diameter gap 22 between the housing 13 of the fluid control valve 5 for switching the nozzle and the valve body 14 is large, the anus washing is performed. Although the water is flowing to the anus washing nozzle 4, the water leaks from the portion of the diameter clearance 22 toward the outlet 11 of the bidet washing nozzle 3 and is washed by the anus washing nozzle 4. At the same time, washing water leaks from the bidet washing nozzle 3.

For this reason, it is necessary to reduce the radial clearance 22 between the housing 13 and the valve body 14, and this processing requires high accuracy and increases the processing cost, and the yield of non-defective products is poor and the productivity cannot be improved. There was such a problem.

Further, when the radial clearance 22 between the housing 13 and the valve body 14 is to be reduced in order to seal the housing 13 and the valve body 14, the valve body 14 is affected by dimensional variations.
However, there is a problem that the housing 13 has a tight fit, the torque required for rotationally driving the valve body 14 becomes large, and even if the switching knob 6 is to be rotated, it is hard and cannot be rotated. .

Further, for the purpose of solving the above problems, FIG.
As shown in, for example, Japanese Patent Laid-Open No. 60-51237, the groove 2 is formed on the outer periphery of the outlet portion 24 of the valve body 23 so as to surround the outlet portion 24.
5, a fluid control valve 27, etc., in which an elastic seal member 26 is provided in the groove 25 has been proposed. However, in this case, when the sealing member 26 crosses the lateral holes 29, 30 of the housing 28 by rotating the valve body 23, the elastic sealing member 26 is deformed by being pushed into the lateral holes 29, 30 or partially damaged. There were challenges.

When the fluid control valve 27 is used not only for switching the flow path but also for controlling the rotation angle of the valve element 23 to control the flow rate, permanent deformation strain of the elastic seal member 26 is generated, resulting in an accurate correction. There were some problems with the flow control, such as being unusable.

The present invention solves the above-mentioned problems.
A first object of the present invention is to provide a fluid control valve 31 that can obtain a flow rate according to the valve opening with a simple configuration and that has a small required drive torque.

A second object is to make it possible to minimize the leakage flow rate to the other flow path with a simple structure and to reduce the required driving torque, and to selectively switch a plurality of flow paths and control the flow rate in each flow path. Providing a fluid control valve 43 that enables it.

A third object is that a single drive means and a simple structure can minimize a leakage flow rate to a portion other than a predetermined flow passage, a required drive torque is small, and a plurality of flow passages can be selectively switched. An object of the present invention is to provide a fluid control valve 56 that is capable of controlling the flow rate in each flow path, is small in size, low in cost, and has excellent durability and reliability.

A fourth object is to provide a first washing nozzle and a second anus washing nozzle separately, and a water flow suitable for a sanitary washing toilet seat capable of selectively switching the nozzles and adjusting the water force with a simple structure. It is to provide a control device.

[0018]

In order to achieve the first object, a fluid control valve of the present invention comprises a housing having an inflow passage and an outflow passage, and a valve body rotatably provided in the housing. And an outlet portion of the flow passage inside the valve body that connects or blocks the inflow passage and the outflow passage is provided on a sliding contact surface with the housing, and a convex portion formed so as to surround the outlet portion is provided. It is a thing.

In order to achieve the second object, the fluid control valve of the present invention comprises an inflow passage communicating with the fluid supply passage, and a housing having a plurality of outflow passages branched from the inflow passage. A valve body rotatably provided in the housing, and an outlet portion of a flow path inside the valve body that communicates or blocks the inflow path and the plurality of outflow paths with a sliding contact surface with the housing. And a convex portion formed so as to surround the outlet portion.

In order to achieve the third object, a fluid control valve of the present invention comprises an inflow passage communicating with a fluid supply passage, and a housing having a plurality of outflow passages respectively branched from the inflow passage. A substantially cylindrical valve body rotatably provided in the housing, and an outlet portion of a flow path inside the valve body is provided on a sliding contact surface with the housing and is formed so as to surround the outlet portion. And a drive means having a motor for rotating the valve body, and a rotation angle control means for selectively switching the plurality of outflow passages and controlling the flow rate by controlling the rotation angle of the motor. Is.

In order to achieve the fourth object, the water flow control device of the present invention comprises a hot water tank for heating the wash water provided in a water supply passage for supplying the wash water, an inflow passage communicating with the hot water tank, and the inflow. A housing having a first outflow passage and a second outflow passage respectively branched from the passage, a valve body rotatably provided in the housing, and an outlet portion of the flow passage inside the valve body. A fluid control valve including a convex portion provided on a sliding contact surface with the housing and surrounding the outlet portion, and a drive unit having a stepping motor for rotating the valve body; Operation having first and second washing nozzles respectively communicating with the first and second outflow passages of the valve, a washing switch for selectively driving the first and second washing nozzles, and a water pressure adjusting switch for adjusting the amount of water Means and said The signal of the work unit is provided with a rotation angle control means for controlling the rotation angle of the stepping motor.

[0022]

In the fluid control valve of the present invention, the convex portion surrounding the outlet portion is provided at the outlet portion of the flow path provided in the valve body rotating in the housing, so that the convex portion slides on the housing. Since the clearance of the contact surface is made small, the leakage from the clearance of the outer circumference of the valve body is significantly reduced, and the flow rate of leakage to other than the predetermined flow path can be minimized to obtain the flow rate according to the valve opening degree.

Further, due to the convex portion provided on the valve body,
The sliding contact area is reduced, and the drive torque required to rotate the valve body can be reduced.

Further, in the fluid control valve of the present invention, the convex portion surrounding the outlet portion is provided at the outlet portion of the flow passage provided in the valve body rotating in the housing having a plurality of outflow passages. Section reduces the clearance on the sliding contact surface with the housing, and leakage from the clearance on the outer circumference of the valve body is significantly reduced. This minimizes leakage to the other channel,
It is possible to selectively switch a plurality of flow paths and control the flow rate in each flow path.

Further, the fluid control valve of the present invention comprises a housing having a plurality of outflow passages, a motor for rotationally driving a valve body having a substantially cylindrical convex portion surrounding the outer peripheral outlet portion, and a rotation angle control means for the motor. By providing a single drive means with a simple structure, it is possible to minimize the leakage flow rate to other than the predetermined flow path, the required drive torque is small, and the selection switching of a plurality of flow paths by remote control, The fluid control valve capable of controlling the flow rate in each flow path can be downsized, reduced in cost, and improved in durability reliability.

Further, the water flow control device according to the present invention uses the stepping motor as a driving means, and forms the convex portion for selectively switching the first and second cleaning nozzles and for adjusting the flow rate of the cleaning water discharged from each cleaning nozzle. Since the fluid control valve having the valve body, the operation means for the cleaning nozzle, and the rotation angle control means for controlling the rotation angle of the stepping motor by the signal of the operation means are provided, the signal from the operation means is provided. The pulse signal supplied to the stepping motor is controlled by the first cleaning nozzle for bidet cleaning,
The second washing nozzle for anal washing can be selectively switched, and the amount of washing water (water force) discharged from the first and second washing nozzles can be finely adjusted according to the signal of the operating means. Water flow control devices are possible.

[0027]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a constitutional view of a fluid control valve 31 showing a first embodiment of the present invention, and FIGS. 2A to 2C are sectional views taken along the line AA of FIG. In the figure, reference numeral 32 denotes a housing, which has an inflow path 33 and an outflow path 34. Reference numeral 35 denotes a valve element rotatably provided in the housing 32, and a flow path 36 that connects or blocks the inflow path 33 and the outflow path 34 is formed inside. Outlet part 3 of flow path 36 of valve body 35
7 is provided on the sliding contact surface 38 with the housing 32,
A convex portion 39 is integrally molded with the valve body 35 so as to surround the outlet portion 37. 40 and 41 are seal packings, and 42 is a rotary knob.

The operation of this embodiment having the above configuration will be described. FIG. 2A shows the valve closed state, in which the flow passage 36 communicating with the inflow passage 33 does not communicate with the outflow passage 34, and the convex portion 39 formed so as to surround the outlet portion 37.
By this, the clearance with the housing 32 is made minute and the leakage of fluid is prevented. FIG. 2B shows the valve half-opened state, and FIG. 2C shows the valve fully opened state. Here, since the convex portion 39 can be molded integrally with the valve body 35 by a polymer material, the productivity is good, and the contact area with the housing 32 is small in part, so that the drive required when the valve body 35 is rotated is required. The torque can be kept small.

Further, as shown in FIG. 9, a groove 25 is provided on the outer periphery of the valve body 23 so as to surround the outlet portion 24, and an elastic seal member 26 is provided in the groove 25. , When the valve member 23 is rotated and the seal member 26 traverses the lateral holes 29, 30 of the housing 28, the elastic seal member 26 is deformed by being pushed into the lateral holes 29, 30 or partially damaged. Thus, not only the valve body 35 can rotate lightly and smoothly, but also the flow rate can be controlled according to the rotation angle of the valve body 35, and the durability can be improved.

As described above, according to this embodiment, since the convex portion 39 surrounding the outlet portion 37 of the valve body 35 is provided,
The convex portion 39 reduces the clearance of the sliding contact surface 38 with the housing 32, the leakage from the clearance of the outer periphery of the valve body 35 is significantly reduced, and the leakage flow rate to other than the predetermined flow path can be minimized.

The convex portion 39 provided on the valve body 35
As a result, the sliding contact area is reduced, the drive torque required to rotate the valve element 35 can be reduced, and a light and smooth rotational operation can be performed.

FIG. 3 is a constitutional view of a fluid control valve 43 showing a second embodiment of the present invention, and FIGS. 4 (a) to 4 (d) are shown in FIG.
FIG. In the figure, reference numeral 44 denotes a housing, which has an inflow passage 45 and first and second outflow passages 46,
Have 47. Reference numeral 48 denotes a valve body rotatably provided in the housing 44, and a flow passage 49 is formed therein for selectively connecting the inflow passage 45 and the first or second outflow passages 46, 47. . Outlet portion 5 of flow path 49 of valve body 48
0 is provided on the sliding contact surface 51 with the housing 44,
A convex portion 52 is integrally molded with the valve body 48 so as to surround the outlet portion 50. 53 and 54 are seal packings, and 55 is a rotary knob.

The operation of this embodiment having the above configuration will be described. FIG. 4A shows a valve closed state, in which the flow path 49 communicating with the inflow passage 45 does not communicate with either the first or second outflow passages 46, 47, and the outlet portion 50.
The convex portion 52 formed so as to surround the gap makes the gap between the convex portion 52 and the housing 44 small and prevents fluid leakage. 4B, the valve body 48 is rotated so that the outlet portion 50 faces the first outflow passage 46 of the housing 44 and the first outflow passage 46 is fully opened. FIG. 4C shows the valve body 48. Is rotated and the second outflow passage 47 is half opened, FIG.
8 further shows the state in which the second outflow passage 47 is fully opened by further rotating 8. Here, since the convex portion 52 can be molded integrally with the valve body 48 by a polymer material, the processing productivity is good, and since the contact area with the housing 44 is a small portion, the drive necessary for rotating the valve body 48 is required. The torque can be kept small.

Further, as shown in FIG. 9, a groove 25 is provided on the outer periphery of the valve body 23 so as to surround the outlet portion 24 of the valve body 23, and an elastic seal member 26 is provided in the groove 25. , When the valve member 23 is rotated and the seal member 26 traverses the lateral holes 29, 30 of the housing 28, the elastic seal member 26 is deformed by being pushed into the lateral holes 29, 30 or partially damaged. Thus, not only the valve body 48 can rotate lightly and smoothly, but also the flow rate can be controlled according to the rotation angle of the valve body 48, and the durability can be improved.

As described above, according to this embodiment, by providing the convex portion 52 surrounding the outlet portion 50 of the valve body 48,
The convex portion 52 reduces the clearance of the sliding contact surface 51 with the housing 44, the leakage from the clearance of the outer periphery of the valve body 48 is significantly reduced, and the leakage flow rate to other than the predetermined flow path can be minimized.

Also, the convex portion 52 provided on the valve body 35.
As a result, the sliding contact area is reduced, the drive torque required to rotate the valve element 48 can be reduced, and a light and smooth rotational operation can be performed.

Therefore, the leak flow rate to the other flow path can be minimized with a simple structure, and the required driving torque is small.
It is possible to provide the fluid control valve 43 that enables selective switching of a plurality of flow paths and flow rate control in each flow path.

FIG. 5 is a constitutional view of a fluid control valve 56 showing a third embodiment of the present invention, and FIGS. 6 (a) to 6 (d) are shown in FIG.
It is CC sectional drawing of. In the figure, reference numeral 57 is a housing, and an inflow path 58 and first and second outflow paths 59,
Has 60. Reference numeral 61 denotes a substantially cylindrical valve element rotatably provided in the housing 57, and has an inflow passage 62 inside.
A flow path 62 is formed that selectively connects the first and second outflow paths 59 and 60 with each other. Flow path 62 of valve body 61
The outlet portion 63 is provided on the sliding contact surface 64 with the housing 57, and the convex portion 65 is integrally molded with the valve body 61 so as to surround the outlet portion 63. Numerals 66 and 67 are seal packings, and 68 is a driving means composed of a motor capable of rotating in forward and reverse directions. The output shaft 69 of the motor 68 has an O-shaped cross section, and is inserted into a hole 70 of the valve body 61 having the same O-shaped cross section.
The mounting flange 71 of the motor 68 has a hole diameter of the housing 57.
The mounting boss 72 is larger in diameter than the mounting boss 72 and has mounting clearance, and absorbs the eccentricity of the shaft center of the housing 57 and the valve body 61. The height dimension of the mounting boss 72 of the housing 57 is larger than the plate thickness of the mounting flange 71 of the motor 68, and the motor 68 is tightened with the screws 73 and 74.
This is a configuration having a degree of freedom of movement for compensating for eccentricity within the above-mentioned mounting clearance.

The operation of this embodiment having the above configuration will be described. FIG. 6A shows a valve closed state, in which the flow passage 62 communicating with the inflow passage 58 does not communicate with either the first or second outflow passages 59, 60, and the outlet portion 63.
By the convex portion 65 formed so as to surround the, the clearance with the housing 57 is made minute and the leakage of fluid is prevented. 6B is a state in which the valve body 61 is rotated and the outlet portion 63 is directed toward the first outflow passage 59 of the housing 57 to fully open the first outflow passage 59. FIG. 6C shows the valve body 61. Is rotating to partially open the second outflow passage 60, and FIG.
1 shows a state in which 1 is further rotated and the second outflow passage 60 is fully opened. Since the convex portion 65 can be integrally molded with the valve body 61 from a polymeric material, the productivity is good, and the contact area with the housing 57 is a small partial area. The torque can be kept small.

Further, as shown in FIG. 9, a groove 25 is provided on the outer periphery of the valve body 23 so as to surround the outlet portion 24, and an elastic seal member 26 is provided in the groove 25. , When the valve member 23 is rotated and the seal member 26 traverses the lateral holes 29, 30 of the housing 28, the elastic seal member 26 is deformed by being pushed into the lateral holes 29, 30 or partially damaged. Thus, not only the valve body 48 can rotate lightly and smoothly, but also the flow rate can be controlled according to the rotation angle of the valve body 48, and the durability can be improved.

As described above, according to this embodiment, by providing the convex portion 65 surrounding the outlet portion 63 of the valve body 61,
The convex portion 65 reduces the clearance of the sliding contact surface 64 with the housing 57, the leakage from the clearance on the outer circumference of the valve body 61 is significantly reduced, and the leakage flow rate to a portion other than the predetermined flow path can be minimized.

Also, the convex portion 65 provided on the valve body 61.
As a result, the sliding contact area is reduced, the drive torque required to rotate the valve body 61 can be reduced, and a small, low-torque motor can be driven to rotate lightly and smoothly, which is compact, inexpensive, and has a long service life. The fluid control valve 56 can be realized. Also, by reducing the required drive torque,
It is possible to reduce the reduction ratio of the reduction gear of the motor 68 that is the driving means. As a result, the responsiveness of switching and flow rate adjustment can be improved.

That is, with a single drive means and a simple structure, the leakage flow rate to other than the predetermined flow path can be minimized, the required drive torque is small, and a plurality of flow paths can be selectively switched and each flow path can be selected. It is possible to provide the fluid control valve 56 that is capable of controlling the flow rate in the above, and is small in size, low in cost, and excellent in durability and reliability.

FIG. 7 is a block diagram of a water flow control device using the above fluid control valve. In FIG. 7, 7 is a hot water tank having a heater 75 provided in a water supply passage 2 for supplying wash water. The fluid control valve 56 shown in FIG. 5 is provided on the downstream side of the hot water tank 7. Reference numerals 76 and 77 denote first and second cleaning nozzles provided to be able to communicate with the first and second outflow passages 59 and 60 of the fluid control valve 56, respectively.
The first wash nozzle 76 is for bidet wash and the second wash nozzle 77 is for anal wash.

Reference numeral 78 is a sanitary washing toilet seat operating means, which are washing switches 79 and 80 for selecting the first and second washing nozzles 76 and 77, and water pressure adjusting switches 81 and 82 for adjusting the amount of water in each washing. , A display means 83 and a stop switch 84 for displaying the selected water force
It consists of Reference numeral 85 is a stepping motor 8 which is a driving means for the fluid control valve 56 in response to a signal from the operating means 78.
6 is a rotation angle control means for controlling the rotation angle.

The operation of this embodiment having the above configuration will be described. After the user sits on the sanitary toilet seat (not shown) and has a toilet, the washing switch 79, 80 is selected, for example, the washing switch 80 is turned on to drive the second washing nozzle 77 for performing anal washing. Then, the signal causes the stepping motor 86 to be rotationally driven through the rotation angle control means 85, and the valve body 61 is rotated to the position shown in FIG. As a result, the wash water is discharged from the inflow passage 58 of the fluid control valve 56 to the second outflow passage 60 via the water supply passage 2, the hot water tank 7, and the like, and then flows into the second wash nozzle 77. When the cleaning switch 80 is pressed, the rotation angle control means 85 first controls the stepping motor 86 so that the standard water pressure is obtained, and rotates the valve body 61. By instructing a desired water pressure with the water pressure adjusting switches 81 and 82, the rotation angle of the valve body 61 is controlled, and the discharge flow rate can be arbitrarily increased or decreased.

After the washing operation, if the stop switch 84 is turned on, the stepping motor 86 is driven to control the valve body 61 to the position shown in FIG. 6 (a) and close the water circuit. When the bidet washing is performed, the washing switch 79 is selected and the same control is performed.

As described above, according to this embodiment, the stepping motor 86 is used as the driving means, the selection switching between the first and second cleaning nozzles 76 and 77 and the flow rate of the cleaning water discharged from each cleaning nozzle. Fluid control valve 56 for regulation
The operating means 78 for the cleaning nozzle and the rotation angle control means 85 for controlling the rotation angle of the stepping motor 86 in response to a signal from the operating means 78 are provided.
By turning on, the pulse signal supplied to the stepping motor 86 is controlled, and the first washing nozzle 76 for bidet washing and the second washing nozzle 77 for anus washing can be selectively switched. In addition, the amount of cleaning water (water force) discharged from each cleaning nozzle can be arbitrarily adjusted according to the signal from the operating means 78.

A convex portion 65 surrounding the outlet portion 63 of the valve body 61
By providing the convex portion 65, the clearance of the sliding contact surface 64 with the housing 57 is reduced, and the leakage from the clearance of the outer periphery of the valve body 61 is significantly reduced. The leakage flow rate to the other second cleaning nozzle can be minimized to the minimum level.

Further, the convex portion 65 provided on the valve body 61.
As a result, the sliding contact area is reduced, the driving torque required to rotate the valve body 61 can be reduced, and the small and low torque stepping motor 86 can be driven to rotate lightly and smoothly. The fluid control valve 56 having a durable life can be realized. Further, since the required drive torque can be reduced, the stepping motor 86, which is a drive means,
The reduction ratio of the built-in reduction gear can be reduced. As a result, the responsiveness of switching and flow rate adjustment can be improved.

Therefore, with a simple structure of the single drive means 86, the leakage flow rate to other than the predetermined flow path can be minimized, the required drive torque is small, and a plurality of flow paths can be selectively switched.
It is possible to provide a water flow control device capable of controlling the flow rate in each flow path, having a small size, low cost, and excellent durability and reliability.

Further, since the stepping motor 68 is used as the driving means of the valve body 61, the pulse angle supplied can control the rotation angle of the valve body 61, that is, the valve opening degree with high accuracy, and the forward / reverse rotation is possible. . As a result, for example, it becomes possible to give fluctuations to the amount of cleaning water, and the repeating effect of strong and weak water flow improves the effect of separating dirt adhered to human body parts to enable efficient cleaning and eliminate monotonous feeling during cleaning. .

That is, it is possible to provide a water flow control device suitable for a sanitary washing toilet seat capable of selectively switching a plurality of washing nozzles and adjusting the water pressure with a simple structure.

[0055]

As described above in detail, the fluid control valve of the present invention has a sliding contact surface with the housing so as to surround the outlet of the flow passage of the valve body rotatably provided in the housing. Since the convex portion is provided, the following effects can be obtained.

(1) Since the convex portion of the valve body outlet portion reduces the clearance of the sliding contact surface with the housing, the leakage from the clearance of the outer periphery of the valve body is significantly reduced, and the leakage flow rate to other than the predetermined flow passage is reduced. It can be minimized and the flow rate can be obtained according to the valve opening.

(2) The convex portion reduces the sliding contact area, and the drive torque required to rotate the valve body can be reduced.

Further, in the fluid control valve of the present invention, the outlet portion of the flow passage provided in the valve body rotating in the housing having a plurality of outflow passages is provided with the convex portion surrounding the outlet portion. The following effects can be obtained.

(1) The protrusion reduces the clearance on the sliding contact surface with the housing, and the leakage from the clearance on the outer circumference of the valve body is significantly reduced, so that the leakage to the other flow passage can be minimized.

(2) The valve element can be rotated with a small torque, and selective switching of a plurality of flow paths and flow rate control in each flow path can be performed lightly and smoothly.

Further, the fluid control valve of the present invention includes a housing having a plurality of outflow passages, a motor for rotationally driving a valve body having a substantially cylindrical convex portion surrounding the outer peripheral outlet portion, and a rotation angle control of the motor. Means are provided, and the following effects can be obtained.

(1) It is possible to minimize the leakage flow rate to a channel other than the predetermined channel with a simple structure of a single drive means, and to selectively switch a plurality of channels and to remotely control the flow rate in each channel. it can.

(2) Since the required drive torque can be reduced, the valve body can be rotationally driven by a small motor having a low torque, and a compact, inexpensive, and long-life fluid control valve can be realized.

(3) Since the required drive torque can be made small, the reduction ratio of the reduction gear of the motor, which is the drive means, can be reduced, so that the responsiveness of flow path switching and flow rate adjustment can be improved.

Further, the water flow control device for the sanitary washing toilet seat according to the present invention uses the stepping motor as a driving means to selectively switch the first and second washing nozzles and adjust the flow rate of the washing water discharged from each washing nozzle. A fluid control valve having a valve body having a convex portion, operation means for the cleaning nozzle, and rotation angle control means for controlling the rotation angle of the stepping motor in response to a signal from this operation means are provided. The effect is obtained.

(1) The pulse signal supplied to the stepping motor is controlled by the signal from the operating means, and the first washing nozzle for bidet washing and the second washing nozzle for anal washing are selectively switched. It is possible to adjust the amount (water pressure) of the cleaning water discharged from the first and second cleaning nozzles according to the signal from the operating means.

(2) Since the stepping motor is used as the driving means, it is possible to perform highly accurate position control according to the pulse signal supplied, and to detect the rotational position detection sensor of the valve body, etc.
Precise water pressure adjustment is possible without flow rate detection means.

(3) By providing the convex portion on the sliding contact surface at the outlet of the valve body, the frictional resistance at the time of rotating the valve body can be reduced and the rotating torque of the stepping motor can be reduced. Since the cost can be reduced and the reduction ratio of the stepping motor can be reduced, the responsiveness of switching and variable flow rate can be improved.

(4) Since the rotation angle can be controlled with high precision by the pulse signal supplied to the stepping motor and the forward / reverse operation can be performed within an arbitrary rotation angle range, it becomes possible to give fluctuations to the amount of washing water and adhere to the human body part. The peeling effect of the filth is improved, efficient cleaning is possible, and the monotonous feeling during cleaning is eliminated.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a fluid control valve showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of the fluid control valve.

FIG. 3 is a configuration diagram of a fluid control valve showing a second embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB of the fluid control valve.

FIG. 5 is a configuration diagram of a fluid control valve showing a third embodiment of the present invention.

FIG. 6 is a sectional view taken along line CC of the fluid control valve.

FIG. 7 is a configuration diagram of a water flow control device in a sanitary washing toilet seat using a fluid control valve according to a third embodiment of the present invention.

FIG. 8 is a block diagram of a conventional water flow control device.

FIG. 9 is a block diagram of another conventional water flow control device.

[Explanation of symbols]

 31 fluid control valve 32 housing 33 inflow passage 34 outflow passage 35 valve body 36 flow passage 37 outlet portion 38 sliding contact portion 39 convex portion 43 fluid control valve 44 housing 45 inflow passage 46 first outflow passage 47 second outflow passage 48 valve body 49 flow path 50 outlet section 51 sliding contact section 52 convex section 56 fluid control valve 57 housing 58 inflow path 59 first outflow path 60 second outflow path 61 valve body 62 flow path 63 outlet section 64 sliding Contact part 65 Convex part 68 Drive means 76 First cleaning nozzle 77 Second cleaning nozzle 78 Operating means 79 Cleaning switch 80 Cleaning switch 81 Water pressure adjusting switch 82 Water pressure adjusting switch 88 Rotation angle control means

Claims (4)

[Claims] 1. A housing having an inflow path and an outflow path, a valve body rotatably provided in the housing, and a flow path inside the valve body for communicating or blocking the inflow path and the outflow path. Is provided on a sliding contact surface with the housing, and a fluid control valve is provided with a convex portion formed so as to surround the outlet. 2. A housing having an inflow passage communicating with a fluid supply passage, a plurality of outflow passages respectively branched from the inflow passage, and a valve body rotatably provided in the housing. An outlet portion of the flow passage inside the valve body, which communicates or blocks the inflow passage and the plurality of outflow passages, is provided on a sliding contact surface with the housing, and has a convex portion formed so as to surround the outlet portion. Provided fluid control valve. 3. A housing having an inflow passage communicating with a fluid supply passage, a plurality of outflow passages respectively branched from the inflow passage, and a substantially cylindrical valve rotatably provided in the housing. Drive having a body, a convex portion formed at a sliding contact surface of the flow passage inside the valve body with the housing and surrounding the outlet portion, and a motor for rotating the valve body And a rotation angle control means for performing selective switching and flow rate control of the plurality of outflow passages by controlling the rotation angle of the motor. 4. A hot water tank provided in a water supply passage for supplying wash water to heat the wash water, an inflow passage communicating with the hot water tank, and a first outflow passage and a second outflow passage respectively branched from the inflow passage. A housing having an outflow passage, a valve body rotatably provided in the housing, and an outlet portion of a flow path inside the valve body is provided on a sliding contact surface with the housing,
A fluid control valve composed of a convex portion formed so as to surround the outlet portion, a drive means having a stepping motor for rotating the valve body, and first and second outflow passages of the fluid control valve, respectively. A first and a second cleaning nozzle in communication,
An operating unit having a cleaning switch for selectively driving the first and second cleaning nozzles and a water pressure adjusting switch for adjusting the amount of water, and a rotation angle control unit for controlling the rotation angle of the stepping motor in response to a signal from the operation unit are provided. Sanitary wash toilet seat water flow control device.