JPH076221B2 - Sanitary washing equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary washing device for washing local areas after use.

2. Description of the Related Art Conventionally, as shown in FIG.
As means for adjusting the amount of water (or hot water) ejected from the cleaning nozzle 55, the flow rate is adjusted by rotating the flow rate adjusting knob 57 linked to the valve shaft of the flow rate adjusting valve 56 provided in the water channel. Was common. However, such a manual flow rate adjustment cannot cope with the pressure change of the water supply and is very inconvenient.

Therefore, the present inventors have considered the following configurations. The main flow path from the water supply port to the washing nozzle is provided with a flow rate detecting means and a flow rate adjusting means for detecting the washing flow rate, and further, a flow rate for setting the amount of water ejected from the washing nozzle to a desired flow rate. A setting unit and a control unit are provided, and a signal from the flow rate detection unit is input to the control unit,
In comparison with the set value of the flow rate setting means, the flow rate adjusting means is driven by a motor to try to eject the set flow rate from the cleaning nozzle.

FIG. 5 shows a schematic view of the flow rate adjusting means. The flow rate control valve unit 58, the motor unit 59, and the transmission gears 67 and 68 are provided. The water guided from the water inlet portion 58a of the flow rate control valve unit 58 is supplied to the motor unit 59.
The flow rate is adjusted by adjusting the clearance between the valve shaft tip 60a and the valve seat 61 by the rotation of the valve shaft 60 whose tip portion is formed at an acute angle, and is connected to the water outlet portion 58b. ing. Reference numeral 62 is a speed reducer for reducing the rotation speed of the motor 59, and 63 is an O-ring. Reference numeral 64 is a closing switch for detecting the fully closed position of the valve shaft 60, and 65 is an opening switch for detecting the fully open position of the valve shaft 60.

Problems to be Solved by the Invention However, such a configuration has the following problems.

At the fully closed position of the valve shaft 60 of the flow rate control valve unit 58, the power of the motor 59 is instantly turned off by the closing switch 64.
However, since the inertial force of the motor 59 remains, the valve shaft 60 is similarly over-learned, and as a result, the valve shaft tip 60a exerts a force of pressing the valve seat 61 against the valve shaft 60. Despite the fully closed position, the gap between the valve shaft tip 60a and the valve seat 61 becomes large over time, and therefore, even though the valve is in the closed state, a water leakage phenomenon occurs and the flow rate control characteristic is significantly increased. There was a problem of changing.

In view of the above problems, the present invention relates to a sanitary washing device that can obtain a flow rate control characteristic that does not change over time.

Means for Solving the Problems And technical means of the present invention for solving the above problems are a flow rate sensor for detecting a wash flow rate, a wash flow rate setting means, a flow rate control valve, and the flow rate sensor. Based on the signal of, the setting means includes a drive means for rotating the flow rate control valve forward / backward so that the flow rate is a cleaning flow rate, a switch for regulating the rotation angle of the drive means, and a cleaning nozzle. A valve case having a valve seat portion, a valve shaft rotatably screwed into the valve case, and a slidably attached to the tip of the valve shaft, the outer cone is substantially conical, and the substantially conical side surface is the valve. A valve piece facing the seat, a spring for urging the valve piece toward the valve seat, a sealing material for sealing a gap between the valve piece and the spindle, and preventing the valve piece from coming off Provided on the large diameter side of the substantially conical top And a water outlet provided on the smaller diameter side of the substantially conical cone.

Action The action of this technical means is as follows.

When the flow control valve is closed, the closing position of the valve shaft is detected by the closing switch, and the
However, since the inertia of the motor remains, the valve shaft also overlearns. However, the valve piece is
Since it is slidably attached, the valve seat receives only the force that biases the valve piece with the spring, and no excessive force is applied. Therefore, over time, the gap between the valve shaft and the valve material does not change, and the initial characteristics can be maintained forever.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is an external view of the sanitary washing device of the present invention, in which the device body 2, the toilet seat 3 rotatably attached to the device body 2 and the toilet pig 4 are placed on the toilet bowl 1. . 5 is a low tank for cleaning the toilet bowl 1, which is supplied with water by a water supply pipe 6. A branch faucet 7 is connected in the middle of the water supply pipe 6, and water is supplied to the device main body 2 by connecting a discharge port of the branch water faucet 7 and a water supply port 8 of the device main body 2 with a connecting pipe 9. ing. Reference numerals 10 and 11 denote connection nozzles, and the operation panel 12 provided on the upper surface of the left sleeve portion facing the apparatus main body 2 by the user.
By performing the washing operation with, the human body is locally washed by extending and jetting hot water. The cleaning nozzle located near the center of the device body 2 is for cleaning the anus, and the family nozzle 10
Call. The other is for women's bidet, ladies nozzle
Call it 11. Reference numeral 13 is an adjustment box containing a setting knob for setting a washing flow rate and a hot water temperature, which the user likes.

FIG. 3 is a washing water channel diagram from the branch faucet 7 to the washing nozzles 10 and 11. The branch faucet 7 has a check valve 14 for preventing accumulated water in the device body 2 from flowing back to the mains of the water supply when the water supply is cut off, and a water stopcock for manually opening and closing water passage to the device body 2. 15,
And a strainer 16 is built in, and the stopcock 15 is usually
It is left open. Branch tap 7 by connecting pipe 9
An electromagnetic water stop valve 17 is connected to the water supply port 8 connected to the water supply port 8. The water stop valve 17 is opened by the user's washing operation to supply water to the apparatus body 2. On the secondary side of the water stop valve 17, a flow rate control valve 18 driven by a motor, a flow rate sensor 19 for detecting the flow rate of water flowing in a water channel, and a hot water tank 21 for supplying hot water by a heater 20 are sequentially connected. There is. The hot water tank 21 is made of a synthetic resin material and stores 1 to 1.5 liters of hot water of about 40 ° C. in order to prevent a change in the hot water temperature during washing. A pair of nozzle selection valves 22 and 23 and cleaning nozzles 10 and 11 arranged in parallel are sequentially connected from the hot water tank 21 to form a cleaning main water passage. On the other hand, there is a branch between the water shutoff valve 17 and the flow control valve 18, and the vacuum breaker 24
A sub water passage 25 is provided through which water is discharged from a water discharge port 26 near the cleaning nozzles 10 and 11. This is for satisfying the minimum water discharge amount defined by the Japan Water Works Association even when the cleaning flow rate is at the minimum state. 27 and 28 are constant flow valves that prevent large flow of water in the event of an abnormality.

FIG. 1 is a schematic diagram showing a specific configuration of a portion A surrounded by a broken line in FIG. The water stop valve 17 has a plunger 29 which is electrically driven by an electric current when a washing operation is performed by the user.
30 is sucked, the diaphragm 31 is opened, and water is sent to the flow control valve 18.

The flow rate control valve 18 is configured to be rotatable by a valve case 33 having a valve seat 35 and a screw portion 33a in the valve case 33.
A valve shaft 32 screwed together and a valve cone 34 having a substantially conical outer shape are attached to the tip of the valve shaft 32 so as to be slidable in the axial direction. The valve piece 34 is arranged such that the substantially conical side surface portions 34a face each other in the direction of the valve seat 35, and a spring 50 is provided so that the valve piece 34 always urges the valve seat 35 side. There is. Reference numeral 51 is an O-ring (sealing material) for preventing water leakage from the gap between the sliding surface 32a of the valve piece 34 and the valve shaft 32. The O-ring 51 includes the spring 50 and the valve piece.
It is provided between the large diameter side 34b of 34 and the spring receiver 52 formed of a flat washer or the like, and by the elastic force of the spring 50,
The large diameter side 34b of the valve piece 34 and the spring receiver 52 are in pressure contact with each other, and as a result, the valve piece 34 and the valve shaft 32 are
Water leakage due to a gap between the sliding surface 32a and the sliding surface 32a can be prevented. 53 is a locking tool for preventing the valve piece 34 from coming off from the valve shaft 32.

The water inlet portion 18a of the flow rate control valve 18 is located on the large diameter side 34b of the valve piece 34, and the water outlet portion 18b is connected to the small diameter side 34c. 54 is an O-ring, which is the valve shaft 32 and the valve case 33.
The space between them is kept watertight.

The other end 32b of the valve shaft 32 is connected to a motor 38 via gears 36 and 37.
Mechanically connected to. 39 is a closing switch for detecting the fully closed position of the flow rate control valve 18 by a cam 41 fixed to the shaft of the motor 38, and 40 is a closing switch for detecting the fully opened position. From the primary side of the valve seat 35, as described above, the constant flow valve 28 and the vacuum breaker 24
A waterway leading to the sub-waterway 25 is branched via. The secondary side of the valve seat 35 is connected to the flow rate sensor 19 by a water passage 42. The flow rate sensor 19 has a substantially conical ball chamber 43,
It is composed of a magnetic ball 44 provided in the ball chamber 43 and a detection circuit 45. Water enters the ball chamber 43 from the tangential direction of the conical portion of the ball chamber 43, and while swirling the ball 44, enters the ball chamber 43 and swirling the ball 44,
It flows out from a discharge port 46 provided on the lower surface of the ball chamber 43. On the other hand, a permanent magnet 47 is attached to the detection circuit 45, and a magnetic field is applied toward the turning surface of the ball 44. ball
The rotation of 44 disturbs this magnetic field, and the magnetic sensor 48 provided near the permanent magnet 47 detects the disturbance of the magnetic field. Ball 44
There is a primary correlation between the number of revolutions and the flow rate flowing through the ball chamber 43. Therefore, the flow rate is detected by the detection circuit 45 as a flow rate signal replaced with the frequency. The detected flow rate signal enters the control device 49 and is compared with the setting signal from the setting means 13 'which is provided in the adjusting box 13 of FIG. 2 and sets the flow rate desired by the user. The control device 49 drives the motor 38 to rotate the flow rate control valve 18 in the forward or reverse direction so that the flow rate signal becomes equal to the set signal, so that the washing flow rate is always the set flow rate desired by the user. The control valve 18 is automatically adjusted. The water discharged from the discharge port 46 of the flow rate sensor 19 is led to the hot water storage tank 21 made of the synthetic resin material described above.

Next, the operation of the configuration of this embodiment will be described.

The user sits on the toilet seat 3 and operates the operation panel 12 to select the cleaning nozzle. If the family nozzle 10 is selected, the water shutoff valve 17 and the nozzle selection valve 22 on the family nozzle side
Opens. At the same time, the flow rate control valve 18 gradually opens from the closed state, and water enters the main body 2 of the apparatus from the branch faucet 7 through the connecting pipe 9. The water flowing through the main washing water channel has a flow rate sensor 19
Is detected as a flow rate signal by the control device 49, and the control device 49 drives the motor 38 so that the flow rate becomes the flow rate desired by the user set by the setting means 66, and the flow rate control valve 18 is automatically adjusted. Then, this adjusted water pushes out the hot water stored in the hot water tank 21, and the family nozzle
From 10, hot water is ejected and used for local cleaning.

If the user selects the ladies nozzle 11, the stop valve 17
The nozzle selection valve 23 on the ladies nozzle side is opened, and the cleaning flow rate is adjusted as in the case of selecting the family nozzle. On the other hand, at the same time when the water stop valve 17 is opened, water flows into the sub water passage 25, and during the cleaning, water is constantly discharged from the water discharge port 26 near the cleaning nozzle.

If tap water pressure fluctuates during cleaning as described above,
The flow rate sensor 19 detects the flow rate change due to water pressure fluctuation,
Feedback is applied, and the control device 49 automatically corrects the cleaning flow rate to the set flow rate by quickly rotating the flow rate control valve 18 forward or reverse through the motor 38. There is no need for the user to perform the flow rate adjusting operation.

Further, when the cleaning function is stopped after the cleaning operation, the stop switch 12a of the operation panel 12 is pressed to cause the motor 3
8 reversely rotates, tightens the valve shaft 32, detects the fully closed position of the flow rate control valve 18 by the closing switch 39, and instantly turns off the power source of the motor 38. But the motor 3
8 did not stop instantly due to inertial force, but kept spinning for a few seconds. Therefore, the valve shaft 32, which is mechanically connected to the motor 38 by the gears 36 and 37, rotates and is screwed, and thus moves in the axial direction. However, according to the present embodiment, the valve shaft 32
Since the valve piece 34 is slidable, the valve piece 34 stops at the position where it abuts the valve seat 35, and the excessive force transmitted by the inertial force of the motor 38 causes 35 parts,
Do not join. Therefore, conventionally, the initial characteristics can be maintained forever without increasing the gap due to wear of the valve seat 35 portion or the contact portion of the valve piece 34 with age as in the reference example.

Further, since the valve shaft 32 and the valve piece 34 are configured to be slidable as described above, a gap due to wear of the sliding surface of the valve shaft 32 and the valve piece 34 may increase with age. According to the present embodiment, an O-ring 51 is provided between the large diameter side 34b of the valve piece 34 and the spring receiver 52, and the O-ring 51 is made large in diameter of the valve piece 34 by the elastic force of the spring 50. Since the side 34b and the valve shaft 32 are constantly in pressure contact with each other, even if a gap occurs due to wear of the sliding surface 32a of the valve shaft 32 and the valve piece 34 over time,
Water leakage can be prevented and the service life of the flow control valve 18 is improved.

Further, the spring 50 is urged from the large diameter side 34b of the valve piece 34 toward the valve seat 35 side, and the large diameter side of the valve piece 34 is urged.
Since the water inlet 18a is provided from 34b, the primary pressure, that is, high water pressure, is constantly applied to the large diameter side 34b of the valve piece 34, so that vibration is caused by the water flow, no abnormal noise is generated, etc., and it is always stable. Can be used in any condition.

Further, the water inlet portion 18a is provided on the large diameter side 34b of the valve piece 34, and the small diameter side
Since the water outlet 18b is provided at 34c, the valve seat 35 and the valve piece 34 are
It is difficult for foreign matter such as water stains and dust to get caught between

EFFECTS OF THE INVENTION The present invention provides a flow rate sensor for detecting a wash flow rate, a wash flow rate setting means, a flow rate control valve, and the flow rate adjustment so that the wash flow rate is set in the setting means based on a signal from the flow rate sensor. The flow control valve is provided with a valve case having a valve seat portion, a drive means for rotating the valve forward and backward, a switch for restricting a rotation angle of the drive means, and a washing nozzle, and the flow control valve being rotatable in the valve case. A threaded valve shaft, a valve piece slidably attached to the tip of the valve shaft and having a substantially conical outer shape and a side surface of which the substantially conical surface faces the valve seat, and the valve piece in the valve seat direction. A biasing spring, a sealing material for sealing the gap between the valve piece and the valve shaft, a locking means for preventing the valve piece from coming off, and a substantially conical piece having a large diameter side are provided. It consists of a water inlet and a water outlet provided on the smaller diameter side of the substantially conical top. It has the following effects.

(1) Even if the valve seat portion of the flow control valve wears over time, the spring biases the valve piece in the direction of the valve seat. More unchanged. Therefore, the life durability of the valve is improved.

(2) In addition, since the sealing material can prevent a phenomenon such as an increase in water leakage due to wear of the valve shaft and the valve piece over time, the service life is improved.

(3) Further, in the water flowing direction, since the water inlet is provided on the large diameter side of the substantially conical top and the water outlet is provided on the small diameter side of the substantially conical top, the valve seat and the It is difficult for foreign matter such as water stains and dust to get caught in the conical top.

(4) Further, since the spring is biased toward the valve seat portion from the large diameter side of the substantially conical piece, and the water inlet is provided from the large diameter side of the valve piece, it is always the above. Since the primary pressure, that is, high water pressure is applied to the large diameter side of the valve piece, the valve piece can be used in a stable state at all times without causing vibration or abnormal noise due to the water flow.

[Brief description of drawings]

FIG. 1 is a schematic view of a main part of a sanitary washing device according to an embodiment of the present invention,
2 is an external view of the sanitary washing device, FIG. 3 is a water channel diagram of the sanitary washing device, FIG. 4 is a water channel diagram of a conventional general sanitary washing device, and FIG. 5 is a conventional sanitary washing device. It is a longitudinal cross-sectional view of a flow control valve unit. 10,11 …… Washing nozzle, 18 …… Flow control valve, 18a …… Water inlet, 18b …… Water outlet, 19 …… Flow sensor, 32 …… Valve shaft, 3
3 ... Valve case, 34 ... Valve piece, 34a ... Side of conical shape, 34b ... Diameter valve side, 34c ... Small diameter side, 35 ... Valve seat, 38 ...
… Motor, 39… Close switch, 40… Close switch,
50 ... spring.

Claims (1)

[Claims] 1. A flow rate sensor for detecting a wash flow rate, a wash flow rate setting means, a flow rate control valve, and the flow rate control valve so that the wash flow rate is set in the setting means based on a signal from the flow rate sensor. A forward / reverse drive means, a switch for controlling the rotation angle of the drive means, and a cleaning nozzle are provided, and the flow rate control valve is a valve case having a valve seat portion, and is rotatably screwed into the valve case. Valve shaft, a valve piece slidably attached to the tip of the valve shaft and having a substantially conical outer shape, and a side surface of the substantially conical surface facing the valve seat, and the valve piece attached in the valve seat direction. A biasing spring, a sealing material for sealing the gap between the valve piece and the spindle, a locking means for preventing the valve piece from coming off, and a large conical piece on the large diameter side. A water inlet and a water outlet provided on the smaller diameter side of the substantially conical top. Raw cleaning equipment.