JPH0514257U - Water supply control system - Google Patents

Abstract

(57) [Abstract] [Purpose] Due to the function of the equipment, it is possible to prevent an excessive flow rate in a water use facility in which a plurality of water use equipments in which the flow rate per unit time cannot be limited when the equipment is used. [Structure] A water distribution pipe to a water using device (17, 18, 19, 20) is a dedicated pipe (16), and operation input means (21, 22, 2) of the water using device is provided corresponding to each of the water using devices.
3 and 24) and a valve device (29, 30, 31, 32) that opens and closes based on a signal to supply water to the water-using equipment, and each corresponding valve based on a signal from each operation input means. A control device (34) is provided to control the device. When the predetermined flow rate is exceeded, this control device delays the operation of the corresponding valve device even if the operation input means is operated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water supply control system for water supply, and more specifically, in a large-scale water supply device, when the amount of water supply to a water-use device exceeds a limit flow rate, the water supply to each water-use device is controlled. About the system to do.

[0002]

[Prior Art]

 Water supply is a system that originally supplies tap water to each household through a water supply pipe branched from the distribution pipe. In this case, the water supply system from the water supply pipe to the indoor water use equipment is usually connected directly to the water distribution pipe.

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

However, in the water receiving tank method, tap water is released to the atmosphere and water is accumulated in the tank, so that the water quality deteriorates in the tank and the sanitary problem often occurs. Alive For this reason, in recent years, a method has been adopted in which the water receiving tank is abolished and the water is directly connected to the water distribution pipe as in the case of general water supply equipment.

In this case, when designing the water supply device such as the water supply pipe, the capacity of the water supply device is set so as to correspond to the maximum amount of water used by the water using equipment at the downstream end, that is, the peak flow rate. By defining this peak flow rate as a simple sum of the maximum amount of water used by all water-using devices, and setting the capacity of the water supply system according to that amount, all such devices will be used in their maximum water consumption state. Since it is extremely rare to be done, it will be an equipment with an excessive capacity as a water supply device. Therefore, it is customary to set the peak flow rate at, for example, 80% of the total amount of maximum water consumption of all water-using equipment, and to design the water supply equipment corresponding to this peak flow rate.

[0006]

[Problems to be solved by the device]

 By the way, in the case of direct connection water supply, since the water supply system is literally directly connected to the water distribution pipe, the amount of water used directly affects the condition inside the water distribution pipe. In some cases, the supply pressure may be insufficient on the downstream side of the water pipe.

Therefore, when the peak flow rate is set as described above and the water supply equipment is designed based on the peak flow rate, a large number of water-using devices are used at one time, and the usage amount exceeds the above-mentioned peak flow rate. If it happens, such a situation of insufficient water supply pressure may occur.

Therefore, the applicant of the present application has previously disclosed, in Japanese Patent Application No. 3-22104, an excessive flow prevention system that limits the flow rate to a limit value when the flow rate of the water supply pipe exceeds the limit flow rate. Proposed.

However, the above-mentioned system attempts to secure the total amount of water to be supplied while limiting the flow rate per unit time. Not applicable when flow is absolutely required.

In view of this, the present invention has a function in the case where the amount of water used in a water-using facility provided with a plurality of water-using devices that requires a predetermined flow rate per unit time exceeds the limit flow rate. , It aims to provide a control system that controls the water supply to each water-using device without limiting the flow rate per unit time and limits the amount of water used by the entire facility within the limit value.

[0011]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a water supply control system for a water-using facility, in which a plurality of water-using equipment is installed, which cannot limit the flow rate per unit time when the equipment is in use, The water distribution pipe to the equipment using water will be 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 to supply water to the water using device are provided. Further, the water supply control system device is provided with a control device for controlling the respective valve devices based on signals from the respective operation input means. This control device, based on a signal from the input means, gives a predetermined order to the valve means and makes them stand by, and all the valve means that are currently opened and the flow rate of the valve means waiting at the first order. A means for calculating the total and a means for controlling the opening / closing of each of the valve means are provided, and when the total of the calculated flow rates does not reach the preset limit flow rate, the system waits at the first rank. The water supply is controlled by releasing the valve means and delaying the opening of the valve means standing by at the first rank when the total of the calculated flow rates exceeds a preset limit flow rate.

[0012]

【Example】

 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 is composed of a plurality of direct connection type toilet bowls.

In FIG. 1, 10 is a water distribution pipe, and 12 is a water supply pipe branched from this water distribution pipe 10. The water supply pipe 12 is divided into two parts at the position of the joint 13 on the way, one is a dedicated water supply pipe 16 for a plurality of direct connection type toilets, and the other is a water supply pipe for other general water use equipment. It is 14. Only four toilets are shown in the figure, 17 and 18 are urinals and 19 and 20 are urinals.

Reference numerals 21 to 24 are switches as operation input means provided corresponding to the toilets 17 to 20, respectively. By pressing each switch, a signal is input to the control circuit 34 and corresponding to each switch. The lamps 25 to 28 as display devices provided in the above are turned on. When this lamp is lit, it indicates that the corresponding switch has been correctly operated and a signal has been sent to the control circuit, and the user has failed even if water does not flow immediately after operating the switch. It means that the switch operation is not necessary and that the switch operation again is unnecessary. The switch is not limited to one that is manually operated, but it is also possible to use a sensor so that the switch is automatically turned on after use.

Numerals 29 to 32 are electromagnetic valves provided corresponding to each toilet, and the electromagnetic valves 29 and 30 are set by the control circuit so that the flow rate per unit time is set to V1 and opened for a time T1. The solenoid valves 31 and 32 have a flow rate of V2 and are controlled to open for a time T2. Of course, the flow rates V1 and V2 may be equalized, and control may be performed so that T1 and T2 are different. Alternatively, the flow rate may not be fixed and set in advance, and the opening may be controlled based on a signal so that the flow rate becomes a required flow rate. Also, the type of valve is not limited to the solenoid valve, and it is clear that a type of valve operated by an actuator can also be used.

A current transformer 36 includes coils 37 to 40 arranged corresponding to the solenoid valves 29 to 32, respectively. Therefore, while a current is applied to each solenoid valve and the valve is open, a voltage is induced in 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. Becomes Since the number of turns of each coil 37 to 40 corresponds to the flow rate of each solenoid valve 29 to 32, the voltage generated in the current transformer 36 corresponds to the total flow rate of the toilet in which water is currently flowing. It will correspond to the summed value. The control circuit 34 stores the unit flow rate of each toilet in the storage device and detects the total value of the flow rates of the toilets currently in use from the voltage of the current transformer.

As a method of obtaining the total value of the flow rates of the toilets in use, the current flowing through the open solenoid valve or actuator may be directly added without using the current transformer.

Further, 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, 42 is a power supply.

Next, the control in this embodiment will be described.

The control in the water supply control device in this embodiment is roughly divided into three types of control which are related to each other. One is, based on the signals from the switches 21 to 24, in principle, the control in which the corresponding valves 29 to 32 are placed in a standby state in the order in which they are input (standby ordering control) and the current total flow rate. At the same time as detecting, the presence or absence of the valve in the standby state is checked, and if there is, a command is issued to open the valve according to the standby order as long as there is a margin in the flow rate. ) And a control (valve control) to open each valve for a predetermined time when receiving an opening instruction.

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

When an input from any of the switches 21 to 24 is detected in step S1-1, the switch number i is specified in the switch S2-2. Next, in S1-3, it is determined whether or not the solenoid valve corresponding to the switch i is already in the standby state or the operating state. This is because when the switch is pressed once and the valve is placed in the standby and actuated state, but when the switch is pressed again, the second input is ignored and the valve is unnecessarily restored. This is to prevent the release.

When it is confirmed in S1-3 that the valve of number i is not in standby or in operation, in S1-4 the flag Fi of the valve of number i is set to "1" and the valve enters the standby state. And the corresponding number i lamp is turned on in S1-5.

In principle, the standby order is set in the input order of the switches 21 to 24. In step S1-6, it is determined whether an interrupt is necessary. That is, even if the solenoid valves 31 and 32 of the urinals 19 and 20 are already in the standby state when the switch 21 or 22 of the urinals 17 and 18 is pressed, the above rule is violated. It is intended to give priority to the solenoid valves 29 and 30. For example, if the switch 21 is pressed while the valve 31 is already waiting in the first rank, the valve 29 interrupts the first rank and the valve 31 is lowered to the second rank. Further, when the switch 30 is pressed while the valves 29 and 31 are in the 1st and 2nd positions and waiting, the valve 30 is interrupted in the 2nd position and the valve 31 is lowered to the 3rd position. In this way, the solenoid valves 29 to 32 are ranked according to the operation of the switches 21 to 24 and put into the standby state.

FIG. 4 shows a flow of the flow rate management control. In step S2-1, it is constantly monitored whether or not there is a valve waiting in the first rank, and in S2-2, the first rank stands in the first rank. Identify the number m of the electromagnetic valve in standby. 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 in the first rank are It is determined whether the flow rate exceeds a predetermined allowable flow rate Vo. When Vc + Vm does not exceed Vo, a signal for opening the solenoid valve of number m is issued in S2-4. If the number Vc + Vm exceeds Vo, it will be kept waiting. Next, in S2-5, the rank is sequentially advanced by one in the second rank and below. If there is a timing conflict between the advancement of S2-6 and the provision of the standby order in S1-8 in FIG. 3, S2-6 is prioritized in this embodiment.

FIG. 5 shows a control flow when each of the solenoid valves 21 to 24 receives an opening command in step S2-4 in FIG. 4. First, the valve is closed in step S3-1. Then, in S3-2, the presence or absence of the command from step S2-4 in FIG. 4 is constantly monitored, and when the command to open the valve is received, the valve is opened in S3-3. In S3-4, it is judged whether or not the elapsed time t after opening the valve reaches a predetermined opening time to for the valve, and when t ≧ to, the valve is closed in S3-5. Then, the lamp corresponding to the valve turned on in S1-5 of FIG. 3 is turned off, and the flag corresponding to the valve set to “1” in S1-4 of FIG. It indicates that it is no longer in standby or in operation.

FIG. 6 is a schematic configuration diagram showing a second embodiment of the present invention, in which the same members as those in FIG. 1 are designated by the same reference numerals. The difference between this embodiment and the first embodiment is that a water supply pipe 14 for general-purpose water using equipment is provided with a flow rate measuring device 40 for measuring the flow rate of water flowing through the water supply pipe 14 per unit time. The valve device 48 for limiting the flow rate is installed in series.

The flow rate measuring device 40 is provided with a venturi pipe 42 and pressure sensors 44 and 46 for detecting the pressure before and after the venturi pipe 42. Based on signals from the pressure sensors 44 and 46, a control circuit 53 housed in the operation panel 53. (However, this control circuit can be integrated with the control circuit 34, of course), so that the flow rate in the water supply pipe 14 is calculated. Reference numeral 50 is an actuator that operates the valve device 48 based on a signal from the control circuit 53 to limit the flow rate in the water supply pipe 14. 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 the signals from the switches 21 to 24 and the like.

By the way, the feature of this embodiment is that the allowable flow rate Vo of the dedicated water supply pipe 16 increases in accordance with the actual flow rate margin in the general-purpose water supply pipe 14. That is, the allowable flow rate VM of the general-purpose water supply pipe 14 is set to be constant, while the allowable flow rate of the dedicated water supply pipe 16 is Vo. It changes with min being the minimum value. That is, when the actual flow rate of the general-purpose 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. The control circuit 34 controls the operation of the solenoid valves 29 to 32 in the same manner as in the first embodiment on the basis of the corrected allowable flow rate, which is corrected to min + Va. When the flow rate of the general purpose water supply pipe 14 is increased, the corrected allowable flow rate is correspondingly increased to Vo. Although it decreases toward min, the Vo. It does not fall below min. When the total of both water supply pipes exceeds a predetermined value, that is, the flow rate of the general purpose water supply pipe 14 is VM and the flow rate of the dedicated water supply pipe 16 is Vo. When trying to exceed min, the flow rate of the dedicated water supply pipe 16 delays the operation of the valves 29 to 32 so that the flow rate of the general purpose water supply pipe 14 limits the opening degree of the valve device 48 to the maximum flow rate Vm. Become. On the other hand, the flow rate of the dedicated water supply pipe 16 is Vo. Even if there is a margin for min, the allowable flow rate VM of the general purpose water supply pipe 14 is not corrected upward, and when the actual flow rate of the general purpose water supply pipe 14 tries to exceed VM, the valve device 48 is activated. Limited.

Effect of the Invention As is clear from the above description, according to the present invention, a large number of water-using equipment provided with a plurality of water-using equipment whose flow rate per unit time when using water cannot be restricted due to the function of the equipment. When the above equipment is used at the same time and the flow rate exceeds the limit, the flow rate can be limited to a certain limit without impairing the function of the water use equipment. Therefore, it is possible to reduce the facility cost by eliminating the need to install a water supply facility having an unnecessarily large water supply capacity, and to avoid a situation in which the water pressure drops downstream of the distribution pipe.

[Brief description of 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 waiting order.

FIG. 4 is a flowchart for flow rate management.

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

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

[Explanation of symbols]

 10 Drain 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)

[Scope of utility model registration request] 1. A water supply control system for a water-using facility, which comprises a plurality of water-using devices in which the flow rate per unit time cannot be limited due to the function of the device when using the device, and a water distribution pipe for the water-using device. Is provided as a dedicated pipe, and corresponding to each of the water using equipment, an operation input means of the equipment is provided, and a valve device for opening and closing based on a signal to supply water to the water using equipment is provided, and each of the operation input means is provided. A control device for controlling each of the valve devices based on a signal from the control device is provided, and the control device is configured to give a predetermined order to the valve device based on a signal from the input device and to wait for the current opening. All the valve means and the means for calculating the sum of the flow rates of the valve means standing by in the first rank, and the means for controlling the opening and closing of each of the valve means, and the sum of the calculated flow rates is preset. Limit When the amount has not been reached, the valve means that waits at the first rank is released, and when the total of the calculated flow rates exceeds a preset limit flow rate, the opening of the valve means that waits at the first rank is delayed. A water supply control system characterized by the above. 2. The valve means is an electromagnetic valve, and the means for calculating the sum of the flow rates of all the valve means currently opened and the valve means standing by in the first rank is all the currently opened valves. A means for calculating the flow rate of the valve means, the means being provided corresponding to each of the valve means, and having a current transformer having a plurality of coils arranged in series,
The water supply control system according to claim 1. 3. The water supply control system according to claim 1, wherein the means for putting the valve device on standby puts the valves on standby in accordance with the order in which the operation input means are operated. 4. The means for putting the valve device on standby, when a certain specific operation input means is operated, the valve means corresponding to the specific operation input means is placed on standby in priority to the other valve means. The water supply control system according to claim 1. 5. The dedicated pipe is provided so as to be branched from a general-purpose water supply pipe for other general water-using equipment, and when the flow rate of the general-purpose water supply pipe has a margin with respect to its limit flow rate,
The water supply control system according to claim 1, wherein the preset limit flow rate is increased and set according to the margin amount.