JP2553723Y2 - Water supply control system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply control system for a water supply. More specifically, in a large-scale water supply device, when the amount of water supplied to a water-using device exceeds a restricted flow rate, each water supply is controlled. The present invention relates to a system for controlling water supply to used equipment.

[0002]

2. Description of the Related Art A water supply system is a system for supplying tap water to each household through a water supply pipe branched from a water distribution pipe. In this case, the water supply device from the water supply pipe to the indoor water use equipment is usually directly connected to the water distribution pipe.

[0003] On the other hand, when demand is large, such as in an apartment or a general building, a water receiving tank is installed in the middle of a water supply pipe, and once the water is received in the water receiving tank, the water is supplied again by pressurizing the pump. In other words, a so-called water receiving tank system has been adopted.

[0004] However, in the water receiving tank system, tap water is released to the atmosphere and the water stays in the tank. As a result, water quality deteriorates in the tank, and sanitary problems often occur. did. Therefore, in recent years, a system in which the water receiving tank is abolished and directly connected to a water distribution pipe as in a general water supply device has been adopted.

[0005] In this case, when designing a water supply device such as a water supply pipe, the capacity of the water supply device is set so as to correspond to the so-called peak flow rate of the maximum water consumption by the water use equipment at the downstream end. By the way, this peak flow rate is determined as the sum of the maximum water usage of all the water-using equipment,
If the capacity of the water supply device is set according to the amount, it is extremely rare that all such equipment is used in the maximum use state, so it is necessary to use equipment with excessive capacity as a water supply device turn into. Therefore, it is customary to determine, for example, 80% of the total sum of the maximum water usage of all the water-using devices as the peak flow, and to design the water supply equipment corresponding to the peak flow.

[0006]

[Problems to be Solved by the Invention] By the way, in the case of direct water supply, since the water supply device is literally connected directly to the water distribution pipe, the amount of water used directly affects the state inside the water distribution pipe. In extreme cases, the water supply pressure may be insufficient downstream of the distribution pipe.

Therefore, if the peak flow rate is set as described above and the water supply system is designed based on the peak flow rate, a large number of water-using devices may be used at one time, and the amount of water used may exceed the above-mentioned peak flow rate. However, such a situation that the water supply pressure is insufficient may occur.

Therefore, the applicant of the present application has previously filed Japanese Utility Model Application No. 3-22.
According to No. 104, when the flow rate of the water supply pipe is going to exceed the limit flow rate, an excessive flow rate prevention system that limits the flow rate to within the limit value is proposed.

However, the above-mentioned system is intended to secure the total amount of water to be supplied while restricting the flow rate per unit time. For example, like a direct-connected toilet, the system has a predetermined flow rate per unit time. Is not applicable when absolutely required.

[0010] Therefore, the present invention is intended for use in a case where the amount of water used in a water-using facility provided with a plurality of water-using equipment that requires a predetermined flow rate per unit time exceeds the limit flow rate. It is an object of the present invention to provide a control system that controls water supply to each water-using device without limiting the flow rate per unit time and limits the usage amount of the entire facility to within a limit value.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides water supply to a water-use facility in which a plurality of water-use devices are installed in which the flow rate per unit time during use of the device cannot be limited due to the function of the device. In the control system, a water supply pipe to the water use equipment is a dedicated pipe. Then, corresponding to each of the water-using devices, an operation input means of the device and a valve device for opening and closing based on a signal and supplying water to the water-using devices are provided. Further, the water supply system device is provided with a control device for controlling each of the valve devices based on a signal from each of the operation input means. This control device is configured to give a predetermined order to the valve means based on a signal from the input means and to make the valve means stand by, and to control a flow rate of all valve means which are currently open and a valve means which stands by at the first place. A means for calculating the sum, and a means for controlling the opening and closing of each valve means, wherein the valve means which stands by at the first place when the sum of the calculated flow rates does not reach a preset limit flow rate. When the sum of the calculated flow rates exceeds the limit flow rate, the water supply is controlled by delaying the opening of the valve means that stands by at the first place. And said
The means of prioritizing the valve means and holding them is a certain operation.
When the operation input means is operated, it corresponds to the operation means
Priority is given to other valve means prior to other valve means.
It is made to be.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing a water supply control device according to an embodiment of the present invention, and FIG. 2 is a circuit configuration diagram thereof.

The water use equipment controlled by the water supply control device in this embodiment comprises a plurality of directly connected toilets.

In FIG. 1, reference numeral 10 denotes a water distribution pipe;
Is a water supply pipe branched from the water distribution pipe 10. Water pipe 1
2 is divided into two parts at the position of the joint 13 on the way, and one is a dedicated water supply pipe 1 for a plurality of directly connected toilets.
6 and the other is a water supply pipe 14 for other common water use equipment. The figure shows only four toilets, 17 and 18 are toilets, and 19 and 20 are urinals.

Reference numerals 21 to 24 denote switches provided as operation input means corresponding to the toilets 17 to 20, respectively. By pressing these switches, a signal is input to the control circuit 34 and the switches correspond to the switches. The lamps 25 to 28 as display devices provided as above are turned on. This lamp, when lit, indicates that the corresponding switch has been activated correctly and a signal has been sent to the control circuit,
This indicates to the user that even if water does not flow immediately after the switch operation, it is not a malfunction, and that it is unnecessary to perform the switch operation again. Note that the switch is not limited to a manually operated switch, and it is also possible to use a sensor so that the switch is automatically turned on after use.

Reference numerals 29 to 32 denote solenoid valves provided corresponding to the respective toilet bowls. The solenoid valves 29 and 30 are controlled by a control circuit so that the flow rate per unit time is set to V1 and the valve is opened only for the time T1. The solenoid valves 31, 32 have a flow rate of V2,
It is controlled to open only for the time T2. Of course, the flow rate V1
And V2 may be made equal, and control may be performed so as to differ only by T1 and T2. Alternatively, the flow rate may not be fixed and set in advance, and the opening degree may be controlled based on the signal so that the required flow rate is obtained. Also, the type of the valve is not limited to the solenoid valve, and it is apparent that a valve operated by an actuator can be used.

Reference numeral 36 denotes a current transformer, which includes coils 37 to 40 arranged corresponding to the respective solenoid valves 29 to 32. Therefore, while a current is applied to each solenoid valve and the valve is open, a voltage is induced in each of the corresponding coils 37 to 40, and a voltage having a value obtained by adding the respective voltage values is generated in the current transformer 36. Become. Since the number of turns of each of the coils 37 to 40 corresponds to the flow rate of each of the solenoid valves 29 to 32, the voltage generated in the current transformer 36 is the sum of all the flow rates of the toilet bowl through which water is currently flowing. It will correspond to the value obtained. The control circuit 34 stores the unit flow rate of each toilet in the storage device, and detects the total value of the flow rate of the toilet currently in use from the voltage of the current transformer.

As a method of obtaining the sum of the flow rates of the toilets in use, the current flowing through the solenoid valve or the actuator that is open may be directly summed without using a current transformer.

The flow rate of each solenoid valve stored in the control circuit may be added or subtracted each time the valve is opened or closed. In the figure, reference numeral 42 denotes a power supply.

Next, control in this embodiment will be described.

The control in the water supply control device according to the present embodiment is roughly classified into three types of controls having mutual relations. One is based on the signals from the switches 21 to 24, and in principle, the corresponding valves 29 to
32 is put in a standby state (standby order giving control), and the current total flow rate is detected, and the presence or absence of a valve in a standby state is checked. If there is, a valve is placed in accordance with a standby order as long as there is a margin in the flow rate. Control to issue an instruction to open and leave it as it is when there is no room (flow management control) and control to open each valve that received the instruction to open for a predetermined time
(Valve control).

FIG. 3 is a diagram showing the flow of the standby order assignment control.

In step S1-1, the switches 21 to 21
24, an input from any one of steps S1 to S4 is detected.
At -2 , the number i of the switch is specified. Next, in S1-3, it is determined whether or not the solenoid valve corresponding to the switch i is already in a standby or operating state. This means that if the switch is pressed once and the valve is in the standby and activated state, but the switch is pressed again, the second input is ignored and the valve is opened again unnecessarily. This is to prevent the situation.

In S1-3, when it is confirmed that the valve of the number i is not in standby or in operation, the flag Fi of the valve of number i is set to "1" in S1-4 to indicate that the valve has entered the standby state. At the same time, the lamp of the corresponding number i is turned on in S1-5.

In principle, the standby order is determined by the switches 21 to 24
Are set in the input order, it is determined in step S1-6 whether an interrupt is necessary. That is, when the switch 21 or 22 of the urinals 17 and 18 is pressed, the solenoid valves 31 and 32 of the urinals 19 and 20 are temporarily set.
Even if the device has already entered the standby state, the above-described principle is violated, and the solenoid valves 29 and 30 are given priority. For example, if the switch 21 is pressed while the valve 31 is already waiting at the first place, the valve 29 interrupts the first place and the valve 31 moves down to the second place. Also, if the switch 30 is pressed while the valves 29 and 31 are in the first place and the second place and waiting, the valve 30 interrupts the second place and the valve 3
1 goes down to 3rd place. Thus, the switch 21
The solenoid valves 29 to 32 are prioritized according to the operations of ２４ to ２４ 24 to enter a standby state.

FIG. 4 shows the flow of the flow management control. In step S2-1, it is monitored whether there is a valve which is always in the first place in the waiting order. In step S2-2, the valve is in the first place in the waiting order. The number m of the middle solenoid valve is specified. Then, the sum of the total value Vc of the flow rates of the toilets currently in use, which can be known from the voltage generated in the current transformer 36, and the flow rate Vm of the solenoid valve m waiting at the first place is determined by a predetermined value. Allowable flow rate V
It is determined whether it is greater than or equal to o. If Vc + Vm does not exceed Vo, a signal is sent to open the solenoid valve of number m in S2-4.
Fire at. When the Vc + Vm exceeds Vo is it to wait. Next, in S2-5, it is confirmed that there is a standby in the second or lower rank, and there is a standby in the second or lower rank.
In S2-6, the order is sequentially moved up by one.
You . In the case where the timing advance in S2-6 and the waiting order assignment in S1-8 in FIG. 3 conflict with each other in timing, S2-6 is prioritized in the present embodiment.

FIG. 5 shows the flow of control when each of the solenoid valves 21 to 24 receives an opening command in step S2-4 in FIG. 4. First, the valves are closed in step S3-1.
In S3-2, the presence or absence of a command from step S2-4 in FIG. 4 is constantly monitored, and when a command to open the valve is received, the valve is opened in S3-3. In S3-4, the elapsed time t after the valve is opened is equal to the predetermined opening time t for the valve.
o, it is determined whether t has been reached, and when t ≧ to, S3-
At 5 the valve is closed. Next, the lamp corresponding to the valve turned on in S1-5 in FIG. 3 is turned off, and further, S1 in FIG.
The flag corresponding to the valve set to "1" at -4 is set to "0" to indicate that the valve is no longer in the standby or operating state.

FIG. 6 is a schematic structural view showing a second embodiment of the present invention, and the same members as those in FIG. 1 are denoted by the same reference numerals. The difference between the present embodiment and the first embodiment is that a water supply pipe 14 for general water use equipment has a flow rate measuring device 40 for measuring a flow rate of water flowing through the water supply pipe 14 per unit time, That is, a valve device 48 for limiting the flow rate is provided in series.

The flow rate measuring device 40 includes a venturi tube 42 and pressure sensors 44 and 46 for detecting pressures before and after the venturi tube 42. Based on signals from the pressure sensors 44 and 46, a control circuit 53 ( However, this control circuit can of course be integrated with the control circuit 34) to calculate the flow rate in the water supply pipe 14. 50 operates the valve device 48 based on a signal from the control circuit 53, and
This is an actuator that restricts the flow rate inside. The control circuit 34 is connected to the control circuit 53 by a wiring 54.
The control circuit 34 controls the operation of the solenoid valves 29 to 32 in the same manner as in the first embodiment based on signals from the switches 21 to 24 and the like.

The feature of this embodiment is that the exclusive water supply pipe 1 is provided.
6 is that the allowable flow rate Vo increases in accordance with the margin of the actual flow rate in the general water supply pipe 14. That is, the allowable flow rate VM of the general water supply pipe 14 is set to be constant, while the allowable flow rate of the dedicated water supply pipe 16 is Vo. The minimum value fluctuates. That is, when the actual flow rate of the general water supply pipe 14 has a margin with respect to the allowable flow rate VM, the allowable flow rate of the dedicated water supply pipe 16 is Vo. corrected to min + Va,
Based on the corrected allowable flow rate, the control circuit 34 controls the operation of the solenoid valves 29 to 32 in the same manner as in the first embodiment. When the flow rate of the general water supply pipe 14 increases, the corrected permissible flow rate corresponding to Vo. min, but decreases with Vo. It does not fall below min.
If the sum of the two water supply pipes exceeds a predetermined value, that is, the flow rate of the general water supply pipe 14 becomes VM, and the exclusive water supply pipe 1
6 is Vo. When the flow rate exceeds min, the flow rate of the dedicated water supply pipe 16 delays the operation of the valves 29 to 32, and the flow rate of the general water supply pipe 14 limits the opening of the valve device 48 to the maximum flow rate Vm. Become. On the other hand, when the flow rate of the dedicated water supply pipe 16 is Vo. Even if there is room for min,
The upward correction of the permissible flow rate VM of the general water supply pipe 14 is not performed, and when the actual flow rate of the general water supply pipe 14 is going to exceed VM, the valve device 48 is operated and limited.

Advantages of the Invention As is apparent from the above description, according to the present invention, a large number of water-use facilities equipped with a plurality of water-use equipment which cannot limit the flow rate per unit time during water use due to the function of the equipment. When the above devices are used at the same time and the flow rate is to be exceeded, the flow rate can be limited to a certain limit without impairing the function of the water use equipment. Therefore, it is possible to eliminate the necessity of providing a water supply facility having a water supply capacity larger than necessary, to reduce the facility cost, and to avoid a situation such as a decrease in water pressure downstream of the water distribution pipe.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment.

FIG. 2 is a circuit configuration diagram of the first embodiment.

FIG. 3 is a flowchart for setting a standby order;

FIG. 4 is a flowchart for managing a flow rate.

FIG. 5 is a flowchart for controlling opening and closing of a valve.

FIG. 6 is a configuration diagram of a second embodiment.

[Explanation of symbols]

Reference Signs List 10 water distribution pipe 12 water supply pipe 14 dedicated water supply pipe 17, 18, 19, 20 toilet bowl 21, 22, 23, 24 switch 25, 26, 27, 28 lamp 29, 30, 31, 32 solenoid valve 34 control circuit

Claims (5)

(57) [Scope of request for utility model registration] 1. A water supply control system for a water use facility in which a plurality of water use devices which cannot limit a flow rate per unit time during use of the device due to the function of the device are provided. A dedicated pipe, and corresponding to each of the water-using devices, an operation input means of the device, and a valve device that opens and closes based on a signal to supply water to the water-using device is provided, and from each of the operation input means. A control device for controlling each of the valve devices based on a signal of the input device, the control device, based on a signal from the input means, a means for giving a predetermined order to the valve means and waiting, and Means for calculating the sum of the flow rates of all the valve means and the valve means that stands by at the first place, and means for controlling the opening and closing of each of the valve means, wherein the calculated sum of the flow rates is set in advance. To limit flow If not reached, the valve means waiting at the first place is opened, and if the calculated flow rate exceeds the limit flow rate, the opening of the valve means waiting at the first place is delayed, and the valve means is opened. The means for prioritizing and waiting, when a certain operation input means is operated, prioritizes the valve means corresponding to the operation means over the other valve means and waits for water supply. Control system. 2. The valve means comprises an electromagnetic valve, and the means for calculating the flow rate of all the currently opened valve means and the valve means which waits at the first place comprises all the currently opened valves. 2. The apparatus according to claim 1, further comprising: a unit configured to calculate a flow rate of the unit, wherein the unit includes a current transformer provided corresponding to each of the valve units and having a plurality of coils arranged in series. 3. Water supply control system. 3. The water supply control system according to claim 1, wherein the means for waiting the valve devices ranks and waits the valve devices according to the order in which the operation input means are operated in principle. 4. The dedicated pipe is provided by branching off from a general water supply pipe for another general water-using apparatus, and when the flow rate of the general water supply pipe has a margin with respect to the limited flow rate, The water supply control system according to claim 1, wherein the preset limited flow rate for the dedicated pipe is set to be increased in accordance with a surplus amount. 5. The means for giving a predetermined order to the valve means and making the valve means wait so that when the operation input means corresponding to the currently waiting or operating valve means is operated, the signal is ignored. The water supply control system according to claim 1, wherein