JPH076222B2 - 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 human body parts and the like with warm water.

2. Description of the Related Art Conventionally, a sanitary washing device of this type has a water channel structure as shown in FIG. 5, for example, as shown in Japanese Utility Model Publication No. 60-3184.

That is, the water supply source 50 includes an opening / closing valve 51, a distributor 52, a flow rate control valve 5
3, the hot water tank 54, the intake valve 55, the vacuum break valve 56, and the jet part 57 are continuously connected to form a main water channel, and the distribution part 52 has a sub water channel including a vacuum break valve 58 and a discharge port 59. It is connected.
In this configuration, when the user opens the opening / closing valve 51, water flows from the water supply source 50 into the main water channel, is heated in the hot water storage tank 54 and becomes hot water, and is jetted from the jet nozzle 57, which is a washing nozzle, for washing. To be done. On the other hand, the water branched from the distributor 52 is discharged from the outlet 59.
And is used for cleaning the cleaning nozzle and the like.

When the user wants to adjust the cleaning flow rate, the flow rate control valve 53
Can be done by.

Problems to be Solved by the Invention However, in the case of such a configuration, when the water supply source is water, the cleaning flow rate changes due to fluctuations in tap water pressure. This type of sanitary washing device is often used in the morning, but at the same time, tap water is often used in the kitchen or washroom, and it is unavoidable that the tap water pressure fluctuates during washing.
Even if the user is washing at the desired washing flow rate, if the water pressure rises, the washing area becomes painful due to the increased washing flow rate, and if the water pressure drops, the washing flow rate decreases and the user feels unsatisfactory. The flow control valve 53 had to be adjusted each time it fluctuated, which was a problem in use. If the water pressure suddenly changed and became high, the washing water force increased significantly and it became dangerous.

Therefore, the present invention provides a flow rate desired by the user even if the tap water pressure fluctuates, and ensures safety even when the water pressure suddenly changes to a high water pressure.

Means for Solving the Problems And the means for solving the above problems according to the present invention include a flow sensor in the main water channel, and a cleaning flow rate automatically set by the user according to the signal of the flow sensor so that the washing flow rate is desired. And a relief valve that opens when the secondary side pressure of the flow rate control valve exceeds a preset pressure and that allows water to flow from the secondary side of the flow rate control valve to the sub water channel. It is a thing.

Action The action of this technical means is as follows.

That is, even if the tap water pressure of the water supply source fluctuates and the flow rate flowing in the main water channel increases or decreases, the flow rate is detected by the flow rate sensor, and the flow rate control valve is automatically adjusted based on the signal, and the cleaning flow rate is It is corrected to the amount desired by the user. Also, even if the tap water pressure suddenly changes to high pressure and the response of the flow control valve is delayed, the relief valve opens during the response delay to guide the high pressure to the sub waterway side, and powerful wash water is ejected from the nozzle. Prevent.

As a result, the user does not need to adjust the water pressure even when the tap water pressure fluctuates, and the user can always safely wash at the desired washing flow rate.

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 by connecting the outlet of the branch faucet 7 and the water supply port 8 of the device body 2 with a connecting pipe 9, water is supplied to the device body 2. Has been done. 10 and 11 are washing nozzles, and an operation panel provided on the upper surface of the left sleeve portion facing the apparatus body 2 by the user.
By performing the washing operation at 12, the human body is locally washed by extending and jetting warm water. The cleaning nozzle located near the center of the device body 2 is for cleaning the anus, and is a family nozzle.
Call it 10. 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. 1 is a washing water channel diagram in which the branch faucet 7 reaches the washing nozzles 10 and 11. The branch faucet 7 has a built-in check valve 14 for preventing backflow when the water supply is cut off, a water stopcock 15 for manually opening and closing water passage to the apparatus body 2, and a strainer 16.
Are usually left open. An electromagnetic water shutoff valve 17 is provided at a water supply port 8 connected to the branch faucet 7 by a connecting pipe 9.
Is connected and is opened by the user's washing operation to supply water to the apparatus main body 2. On the secondary side of the water shutoff valve 17, a flow rate control valve 18 driven by a motor, a flow rate sensor 19 for detecting the flow rate, a hot water tank for supplying hot water by a heater 20.
21, a pair of nozzle selection valves 22 and 23 arranged in parallel, and cleaning nozzles 10 and 11 are sequentially connected to form a main cleaning water passage.

On the other hand, a sub-water passage 25 is provided that branches from between the water shutoff valve 17 and the flow rate control valve 18 and discharges water near the cleaning nozzles 10 and 11 via the vacuum breaker 24.

Further, a relief valve 26 is provided from the secondary side of the flow rate control valve 18 to open when the pressure exceeds a certain pressure and to pass water to the sub water passage 25. 27 and 28 are constant flow valves, which prevent abnormal large flow of water.

FIG. 3 is a schematic diagram showing a specific configuration of the portion A with a broken line frame in FIG. When the user performs a washing operation, the water shutoff valve 17 causes a current to flow through the coil 29, the plunger 30 is pulled up by the magnetic force, the diaphragm 31 is opened, and water is sent to the flow rate control valve 18. Flow rate control valve 18 has valve shaft 32
The clearance between the valve piece 33 provided at the tip of the valve and the valve seat 34 formed in the housing is adjusted by rotating the valve shaft 32 to adjust the flow rate. The other end of the valve shaft 32 has gears 35, 35 '.
Is mechanically connected to the motor 36 via. Valve seat 34
From the primary side, a sub waterway passage 37 that leads to the vacuum breaker 24 is branched, and at the branch inlet part, a constant flow valve that is throttled so that the flow rate is about 1 / min even at high pressure.
28 are provided. The sub water passage 25 is for satisfying the minimum water discharge amount defined by the Japan Water Works Association even when the cleaning flow rate is reduced to the minimum, and at the same time, the water discharge serves to clean the cleaning nozzle and the toilet bowl. The secondary side of the valve seat 34 is a main water passage 38 that communicates with the flow sensor 19, and the relief valve 26 is provided from the main water passage 38 toward the sub water passage 37. In relief valve 26, top 39 is spring
It is pressed against 40 to block the water passage on the side of the main waterway passage 38, but it is opened when the water pressure in the main waterway passage 38 exceeds the pressure required for washing, and water is passed to the sub waterway passage 37. To relieve pressure. Since the pressure in the sub water passageway 37 is throttled by the constant flow valve 28, it is always lower than the pressure in the main waterway passageway 38, and when the relief valve 26 is open, the high pressure in the main waterway passageway 38 is prompt. It is propagated to the sub waterway passage 37 side.

The flow sensor 19 connected to the main water passage 38 includes a substantially conical field ball chamber 41 and a magnetic ball 42 provided in the ball chamber 41.
And a detection circuit 43. That is, water enters the ball chamber 41 from the tangential direction of the conical portion of the ball chamber 41, and the ball 41
While being swirled, the water is discharged to the hot water tank side from the discharge port provided on the lower surface of the ball chamber 41. On the other hand, a permanent magnet 44 is attached to the detection circuit 43, and a magnetic field is applied toward the turning surface of the ball 42. This magnetic field is disturbed by the rotation of the ball 42, and the magnetic sensor 45 provided near the permanent magnet 44.
Detects the disturbance of the magnetic field. The relationship between the flow rates of the balls 42 and the ball chamber 41 is linearly related, and therefore, the flow rate is detected by the detection circuit as a flow rate signal substituted for the frequency. The control device 46 compares the detected flow rate signal with the setting signal from the setting means 47 in which the flow rate desired by the user is set.
36 is driven to rotate the flow rate control valve 18 forward and backward, and the flow rate is automatically adjusted to the set flow rate desired by the user. Reference numeral 48 denotes a micro switch, and a cam 49 fixed to the shaft of the motor 36 detects whether the flow rate control valve 18 is fully closed or fully opened, and stops the motor 36.

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 passing through the main washing water channel is detected as a flow rate signal by the flow rate sensor 19, and the control device 46 drives the motor 36 so that the flow rate signal becomes the flow rate signal set by the setting means, which is desired by the user, and adjusts the flow rate. The valve 18 is automatically adjusted. Then, this adjusted water pushes out the warm water stored in the warm water tank, and the warm water is ejected from the family nozzle 10 for local cleaning.

If the user selects the ladies nozzle, the stop valve 17
Then, 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 shutoff valve 17 is opened, water flows into the sub water passage 25, and water is constantly discharged near the cleaning nozzle during cleaning.

In this way, the cleaning flow rate is constantly detected by the flow rate sensor 19, and the control device 46 automatically controls the flow rate control valve 18 so that the set flow rate is reached, so the tap water pressure fluctuates,
Even if the cleaning flow rate increases or decreases, the cleaning flow rate is automatically corrected to the set flow rate, and the user does not need to perform the flow rate adjustment operation every time the water pressure changes.

Also, if the hydraulic fluid pressure instantly rises to high pressure, even if the response of the valve shaft 32 is delayed, the relief valve 26 opens and the high pressure escapes to the sub water channel 25 side, causing an abnormal strong water jet from the washing nozzle. There is nothing to do.

FIG. 4 is a diagram showing the relationship between water pressure fluctuation and cleaning flow rate. The lower B curve shows a model of water pressure fluctuation, and the upper row shows the change of the cleaning flow rate when the water pressure fluctuation changes like the B curve. The broken-line C curve is for the conventional example, and the cleaning flow rate changes in accordance with the water pressure fluctuation. When the water pressure changes suddenly,
The cleaning flow rate also increases rapidly, which may cause dangerous water pressure for the user. On the other hand, the D curve is the cleaning flow rate characteristic of one embodiment of the present invention, and for a gentle change in water pressure,
It is completely corrected and the cleaning flow rate does not change and the flow rate is as set. The response of the flow rate control valve 18 is delayed in response to a sudden change in water pressure, but the relief valve 37 works to release high pressure to the sub-waterway side, the amount of increase in the wash flow rate is small, and the set flow rate value changes with time. It does not pose a risk to the user.

EFFECTS OF THE INVENTION As is apparent from the above description, in the present invention, the flow rate sensor is arranged in the main washing water channel, and the flow rate control valve is automatically adjusted so that the washing flow rate matches the set flow rate desired by the user. Therefore, even if the water dynamic pressure of the water supply source fluctuates, the cleaning flow rate is automatically corrected and the cleaning can always be performed at the flow rate desired by the user.

In addition, since the relief valve that opens to the sub waterway side when the secondary side water pressure of the flow rate control valve exceeds the set value is provided, there is a rapid change in water pressure to a high pressure that is faster than the response of the automatic adjustment of the flow rate control valve. Even if there is, high pressure is released through the relief valve to the sub waterway, and therefore safe without causing dangerous washing water force.

As described above, according to the present invention, it is very easy to use,
It is possible to provide a safe sanitary washing device having excellent washing characteristics.

[Brief description of drawings]

FIG. 1 is a water channel diagram of a sanitary washing device according to an embodiment of the present invention, FIG. 2 is an external view of the sanitary washing device, FIG. 3 is a configuration diagram of part A of FIG. 1, and FIG. Between the cleaning flow rate and the cleaning flow rate, No. 5
The figure is a water channel diagram of a conventional sanitary washing device. 2 ... Device body, 7 ... Branch faucet, 8 ... Water inlet, 9 ...
… Connecting pipe, 10,11 …… Washing nozzle, 17 …… Water stop valve, 18…
… Flow control valve, 19 …… Flow sensor, 21 …… Hot water tank,
25 …… Sub channel, 26 …… Relief valve.

Claims (1)

[Claims] 1. A main water channel comprising a water shutoff valve directly connected to a water supply source, a flow rate sensor, a heating means, and a washing nozzle for washing a human body part; and a sub branching from a secondary side of the water shutoff valve to discharge water to the outside. A water channel, and a flow rate control valve for providing a desired cleaning flow rate based on a signal from the flow rate sensor is provided between the water shutoff valve and the flow rate sensor, and a secondary side of the flow rate control valve and the sub water channel are provided. A sanitary washing device equipped with a relief valve that opens when the water pressure exceeds a set level in the waterways to be connected.