JPH0730788Y2 - Two water supply line pressure measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pressure measuring device for two water supply channels, which measures the water supply pressure in each of two water supply channels.

(Prior Art) It is well known that the toilet bowl is equipped with a rim water supply channel for cleaning the inner surface of the bowl and a jet water supply channel for more effectively performing siphoning and increasing the cleaning power. Has been.

In some of such toilet bowls, a pressure gauge is provided in each water channel to measure the flow rate in each of the water channels, and the flow rate is calculated from this pressure value.

(Problems to be solved by the invention) However, it is not preferable in terms of cost to attach two pressure gauges to one toilet bowl. Therefore, for example, it is conceivable to measure the water supply pressure immediately before branching into each water supply channel, but in this case, since the pressure reduction occurs due to the opening of the branch valve, a correction means for correcting this is required.

Therefore, an object of the present invention is to provide a device capable of measuring the pressures of two water supply passages that are not used at the same time, such as the rim water supply passage and the jet water supply passage, with a single pressure sensor.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a passage between two water supply passages used at different times so as to communicate these water supply passages, and the passage and each water supply passage. A valve body for introducing the water supply pressure of the water flow is provided at the connection portion with and only when there is a water flow in the water supply passage, and a pressure sensor is provided in this passage.

(Operation) When there is a water flow in one of the water supply passages, the pressure is introduced into the passage by the operation of the valve body, and the pressure in each water supply passage can be measured by one pressure sensor.

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

FIG. 1 is a vertical sectional view of a toilet bowl according to the present invention. The toilet bowl 1 has a bowl portion 3 partitioned by a partition wall 2 and a trap drainage channel 4. The trap drainage channel 4 connects an inflow port 5 opened in the lower part of the rear wall of the bowl part 3 and an outflow port 6 opened in the rear bottom surface of the toilet bowl 1 by bending them in a substantially inverted U shape. The drainage passage 4b of the trap drainage passage 4 downstream of the weir portion 4a is formed in a substantially straight pipe shape, and is formed by a water seal generating mechanism 7 separate from the toilet bowl from the substantially middle portion of the discharge passage 4b to the downstream side. is doing.

A rim water passage 9 is formed in an annular shape on the rim portion 8 at the upper edge of the bowl portion 3 so as to project inward of the bowl portion 3, and rim water spouts 10 are formed on the bottom surface of the rim water passage 9 at appropriate intervals. Open diagonally to the bowl part 3. Further, the rim water passage communicates with the rim water supply chamber 11 and the rim water supply passage 9a at the rear part.

A jet nozzle 12 is attached to the bottom of the bowl portion 3. The jet nozzle 12 is attached to the inlet 5 of the trap drainage channel 4.
Is oriented.

A box 13 is provided in the upper rear part of the toilet bowl 1.
The water supply control system 14 is stored in 13. The water supply control system 14 includes a two-way automatic switching valve 20 for independently supplying water to the bowl portion 3 via the rim water supply passage 9a and the rim water supply chamber 11 and water supply to the jet supply passage 12c. As shown in the figure, a pressure measuring device 30 according to the present invention provided between these water supply channels 9a and 12c, a control device 15, an operation section 16 for giving a cleaning start input to this control device 15, and a water supply pipe 17 Pressure sensor 18 to detect the water supply pressure of the vacuum rake for rims and jets 1
It consists of 9,21.

A water supply pipe 17 is connected to the inflow port of the two-way automatic switching valve 20, and one outflow port of this switching valve 20 supplies water to the rim water supply chamber 11 via a vacuum breaker 19 provided in the rim water supply passage 9a. Connect to mouth 11a. The other outlet of the switching valve 20 is connected to the jet water supply port 12b of the jet nozzle 12 through a vacuum breaker 21 and a jet supply passage 12c made of metal, synthetic resin, synthetic rubber, or the like.

FIG. 2 is a view showing a pressure measuring device according to the present invention, and is a sectional view showing the structures of the two-way switching valve 20 and the pressure measuring device 30. Further, FIG. 3 shows a view of the valve body taken along the line III-III in FIG.

FIG. 4 is a cross-sectional view showing the structure of the two-way switching valve. This switching valve 20 bifurcates the inflow pipe 100 connected to the water supply pipe 17 to form the first outflow pipe 9a. Second outflow line 12c
A valve element 103 is provided between the actuator and the valve element 103, and one minute distance stepless drive type actuator 10 for operating the valve element 103 is provided.
Equipped with 4.

The valve bodies 103 are arranged symmetrically with respect to the actuator 104, and a partition wall 105 having a substantially cylindrical shape is projected in the first and second outflow conduits 9a and 12c, and a tip edge of the partition wall 105 is provided. By forming the main valve seat 106 on the inner surface of the inflow side conduit 107, the outer periphery of the diaphragm 109 made of a flexible material is attached in a watertight state to the inner surface 108 of the inflow side conduit 107, and the central portion of the diaphragm 109 is brought into contact with the main valve seat 106 The communication between the inflow side conduit 107 and the first and second outflow conduits 9a and 12c is blocked.

In addition, a small-diameter orifice 110 is bored in the peripheral edge of the diaphragm 109 facing the inflow side conduit 107 to connect the inflow side conduit 107 and the pressure chamber 111. In addition, diaphragm 1
A pilot valve seat 112 and a pilot passage 113 are provided in the center of 09, the pressure chamber 111 and the outflow pipes 9a and 12c are communicated with each other, and the pilot valve seat 113 is connected to the actuator 104 in a distal end surface of the pilot valve body 114. By bringing them into contact with each other, the pressure chamber 111
The open / close communication with the outflow pipes 9a, 12c is opened and closed.

The pilot valve seat 114 is attached to the tip of the pilot valve body 114.
An elastic body for contacting with is continuously provided.

In particular, the orifice 110 has a smaller diameter than the pilot passage 113, and when the pilot passage 113 is closed by the pilot valve body 114, the pressure in the pressure chamber 111 increases,
The diaphragm 109 is pressed toward the main valve seat 106, and the valve body 103
Closed, the pilot valve body 114 separates from the pilot passage 113, and the pilot passage 113 is open, the pressure chamber 111
From the pilot passage 113 to the rim water supply passage 9a and the jet water supply passage 12c, which are the outflow pipes, the pressure in the pressure chamber 111 decreases, and the pressure in the inflow side pipe 107 causes the diaphragm 109 to move from the main valve seat 106. The valve element 103 is configured to be opened apart. In the figure, 115 is a packing having a small sliding resistance.

The micro distance stepless drive type actuator 104 includes a plunger 117 that is concentrically movable in a cylindrical casing 116 and along an axis, and a piezoelectric element assembly that is concentrically arranged on the outer peripheral surface of the plunger 117. It consists of 118 and.

The piezoelectric element assembly 118 is composed of four piezoelectric elements a, b, c, d,
The piezoelectric elements b and c on the center side are fixed to a holding portion 119 formed at the center of the inner wall of the casing 116. The base ends of cantilevered elastic bridges e and f are fixed to the axial end faces of the piezoelectric elements b and c, and the tip ends of the elastic bridges e and f are
Piezoelectric elements a and d are fixed to the outer peripheral surface thereof, and brake shoes g and h are fixed to the inner peripheral surface thereof.

The piezoelectric elements a, d among the piezoelectric elements a, b, c, d expand the piezoelectric element itself in the energized state, so that the inner diameter is reduced to clamp the plunger 117, and in the non-energized state. The piezoelectric element itself returns to the original state and the inner diameter is expanded from that when energized to release the plunger 117. On the other hand, piezoelectric element
b and c extend in the energized state more than in the non-energized state, and lengthen the entire length of the plunger 117 in the axial direction.

Therefore, by controlling the four piezoelectric elements a, b, c, d by the controller 15, the plunger 117 can move in the axial direction.

The piezoelectric elements a, b, c, d are cylindrical elements formed by laminating a large number of piezoelectric element pieces in the axial direction of the plunger 117 as shown in the figure, and electrodes are provided at both ends of the cylinder, and both ends It operates by applying a voltage to.

For the piezoelectric element piece, for example, piezoelectric ceramics can be used. As such piezoelectric ceramics, ABO ₃
A ferroelectric material with a perovskite crystal structure
PZT [Pd (Zr, Ti) O ₃ ] system, PLZT [Pb (Zr, Ti) O ₃ ], PT
A (PbTiO ₃ ) system or a three-component system based on PZT can be used.

The plunger 117 is formed in a substantially cylindrical shape, accommodates the base end enlarged diameter portion 114a of the pilot valve body 114 at both ends inside, and a coil spring having an urging force in the expansion direction between each base end enlarged diameter portion 114a. Each pilot valve body 114
Bias the pilot valve seat 112 toward the piezoelectric element assembly 1
When 18 is not energized, both pilot valve seats 112 are closed.

Also, locking inner flanges 121 are provided on the inner peripheral surfaces of both ends of the plunger 117 so that the base end expanded portion 11 of each pilot valve body 114 is provided.
A valve stem with a diameter smaller than 4a is inserted, and when the plunger 117 is operated in one of the left and right directions, the pilot valve seat 112 in this operating direction remains closed and the pilot valve on the opposite side to the operating direction is closed. The seat 112 allows the pilot valve body 114 to be separated from the pilot valve seat 112 by the contact between the locking inner flange 121 and the base end enlarged diameter portion 114a, thereby opening the valve body 103.

Thus, the two-way automatic switching valve 20 causes the flowing water in the water supply pipe 100 to flow through either the rim water supply passage 9a or the jet water supply passage 12c as shown in FIG. Water supply channel 9a for these rims
A passage 31 is provided between the jet water supply passage 12c and
One pressure sensor 18 is provided in this central portion. aisle
Valve bodies 33 and 34 are provided in the vicinity of a connection portion of the water supply passages 9a and 12c of 31. These valve bodies 33, 34 are provided with ring-shaped contact projections 35, 36 on the inner circumference of the passage 31, and the disc-shaped water stop plates 37, 38 are provided on the end surfaces 35a, 36a of the contact projections on the pressure sensor side. Is configured to suppress. The springs 39 and 40 are the contact protrusions 35,
The ring-shaped projections 41, 42 provided on the water supply passages 9a, 12c side with respect to 36 are extended and attached between the inner peripheral ends 41a, 42a of the ring-shaped protrusions 41, 42 and the outer end surfaces 37a, 38a of the water blocking plates 37, 38. And 37,3 of the water stop plate
The outer end surface of 8 has a paddle 43a, 43a projecting to the water supply passages 9a, 12c at the center thereof and receiving the dynamic pressure of the water flow flowing through the water supply passages 9a, 12c at the tip thereof, and the valve bodies 33, 34 are opened at the time of water supply. Paddle bars 43, 44 are provided. Further, packings 45 and 46 are provided on the outer peripheral portions of the outer end surfaces of the water stop plates 37 and 38 which come into contact with the contact projections 35 and 36.

According to such a configuration, only the valve body on the side of the water supply channel where the water is supplied can be opened to introduce the water supply pressure into the passage 31, and one pressure sensor 18 measures the water supply pressure in both water supply channels 9a, 12c. be able to.

FIG. 5 shows another embodiment of the present invention. A valve body 48, 49 according to this embodiment has a water stop plate 5 at one end of the connecting portion of the passages 9a, 12c.
Attach 0, 51 so that it can swing freely, and always use spring 5
It is biased by 6,57 so that the inner peripheral surfaces 52a, 53a of the ring-shaped contact projections 52, 53 provided at the boundary of the connecting portion are brought into contact with each other via packings 54, 55. Even with such a configuration, the same operation as that of the valve body shown in FIG. 2 can be achieved, and the pressure of each water supply passage can be measured by one pressure sensor 18.

Next, the configuration of the water supply control system will be described with reference to the block diagram of FIG.

The control device 15 includes an input interface circuit 15a, a microprocessor unit (MPU) 15b, a memory 15c, and a timer 15.
d, an output interface circuit 15e, the operation unit 16 and the pressure sensor 18 are connected to the input interface 15a, and the two-way switching valve 20 is connected to the output interface circuit 15e.

The operation unit 16 includes a switch for starting the cleaning of the toilet 1, and the opening / closing of this switch is input to the control device 15 by the activation signal line 16a.

The operation unit 16 may be provided with a plurality of operation buttons so that the supply amount of wash water can be selected. Further, a switch or a sensor for detecting seating is provided, and these signals are input to the control device 15 to enable the operation of the operation unit 16 only in the seated state, or after the seated state is changed to the unseated state. Alternatively, the cleaning may be automatically started after a predetermined time.

As the pressure sensor 18, for example, a semiconductor or piezoelectric ceramic type pressure sensor is used. The output signal of the pressure sensor 18 is input to the AD converter in the input interface 15a via the pressure signal line 18a and converted into a digital signal corresponding to the water supply pressure.

The two-way switching valve 20 is connected to the output interface circuit 15e via the water supply control line 14a.

FIG. 7 shows the flow timing of the rim water supply passage and the jet water supply passage. In the toilet according to the present embodiment, since the use timings of the two water supply passages 9a and 12c are different as described above, the water supply pressure in each water supply passage can be measured by one pressure sensor, and thus the flow rate can be calculated. .

That is, by the activation signal from the operation unit 16, the rim water supply channel 9a
Alternatively, when the pressure sensor 18 detects the water pressure when the jet water supply passage 12c is used, the control device 15 can determine the flow rate Q with the pressure P and the relationship of Q = Cv√P and can perform the flow rate control.

In the cleaning operation, a fixed flow rate is first supplied to the rim through the rim water supply channel, and then a fixed amount of jet water is immediately supplied to the jet water supply channel to efficiently perform the siphon action. The rim is supplied with water to seal the water.

(Effect of the Invention) As is clear from the above description, according to the present invention, a passage is provided between two water supply passages used at different times so as to connect these water supply passages to each other, and A valve body for introducing the water supply pressure of the water flow is provided at the connection part of the water supply channel only when a water flow exists in the water supply channel, and a pressure sensor is provided in this passage, so that the water supply pressure flowing through the two water supply channels is reduced to one pressure. Since it can be measured by a sensor, the cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical cross-sectional view of a toilet bowl according to an embodiment of the present invention, FIG. 2 is a view showing a pressure measuring device according to the present invention, and FIG. 3 is III-III of FIG. FIG. 4 is a sectional view showing the structure of the two-way switching valve, FIG. 5 is a view showing another embodiment of the present invention, FIG. 6 is a block diagram showing a control device, and FIG. It is a flowchart which shows a water supply timing. In the drawing, 9a is a rim water supply channel, 12c is a jet water supply channel, 18 is a pressure sensor, 20 is a two-way switching valve, 30 is a pressure measuring device for two water channel, 31 is a passage, 33, 34, 48, 49. Is a valve body.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Shinji Shibata 2-8-1, Motomura, Chigasaki-shi, Kanagawa Tochi Kikai Co., Ltd. Chigasaki factory (72) Inventor Noboru Niibara 2--8, Motomura, Chigasaki-shi, Kanagawa No. 1 Tochiki Co., Ltd. Chigasaki Factory

Claims (1)

[Scope of utility model registration request] 1. A passage is provided between two water supply passages used at different times so as to communicate these water supply passages, and only when a water flow is present in the water supply passage at a connection portion between the water supply passage and each water supply passage. A pressure measuring device for two water supply channels, which is provided with a valve body for introducing a water supply pressure of a water flow, and a pressure sensor is provided in this passage.