JPH05295769A - Water level control device for water tank - Google Patents

Abstract

PURPOSE:To make turnover of water in the water tank constant so as to eliminate deterioration of water quality such as chlorine concentration, and insure a necessary water quantity for sanitation according to the water consumption in case of water failure or the like, even in case of either a large water consumption or a little water consumption. CONSTITUTION:A water level detector 10 with which water level is detected by pressure is provided on the bottom part of a water tank 1, and a water level signal is sent from the water level detector to a controller 11. Controlled water level range in the water tank is changed according to water consumption, the larger the water consumption is, the higher the controlled water level range is, and the smaller the water consumption is, the lower the controlled water level range is.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the water level in a water tank of a building, a condominium or the like. More specifically, the present invention can control the water level of these aquariums in accordance with the amount of water consumed and other factors, and easily and reliably perform the water quality control and other management of the water stored in the aquariums. The present invention relates to a water level control device.

[0002]

2. Description of the Related Art Generally, in buildings, condominiums, hospitals, schools, etc. that consume a large amount of water, a water tank is installed on the roof or underground, and the supplied tap water is stored in this water tank. It is configured to supply water to the consumption points at each end.

A conventional device for controlling the water level in such a water tank is provided with an electrode type or float type water level detector in the water tank, and the water supply valve is closed when the water level reaches a predetermined high water level. Then, the water supply is stopped, and when the water level drops to a predetermined low water level, the water supply valve is opened and the water supply is restarted in the water tank.

By the way, in a so-called multi-tenant building or resort condominium in which a large number of tenants live, the water consumption greatly changes depending on the day of the week, the season and the like. For this reason,
When the water consumption decreases, it takes a long time for the water level in the aquarium to drop from high to low. Therefore, when the amount of water consumed is small, the rotation rate of the water in the water tank, that is, the exchange rate decreases, and the same water stays in the water tank for a long time. For this reason, the chlorine concentration in the water is reduced, which causes problems such as easy propagation of various bacteria.

On the other hand, considering the case of water interruption, it is preferable that the amount of water stored in this water tank is large. In other words, if water interruption occurs, until water interruption is restored,
It is preferable that the flush toilet and other water are stored in the aquarium in an amount sufficient to secure the minimum required amount for hygiene.

In order to satisfy such requirements, it is preferable to change the set value of the water level to be controlled according to the amount of water consumed. However, the conventional water level control device uses electrodes and floats to detect the water level, and it is impossible or extremely troublesome to change the set value of the water level control. Further, in the conventional water level control device, it is not possible to appropriately control the water level according to the amount of water consumed.

[0007]

The present invention has been made based on the above circumstances. The water level in the water tank is controlled by controlling the water level in the water tank in response to fluctuations in water consumption and other factors. It is possible to maintain the water quality by maintaining the turnover ratio within a predetermined range and preventing the concentration of chlorine in the water from decreasing.
It is intended to provide a water level control device for a water tank, which can store a necessary minimum amount of water corresponding to the amount of water consumed.

[0008]

According to the present invention, a pressure detector for detecting a head pressure is provided at the bottom of a water tank, and a signal from the pressure detector is received to supply water to the water tank in response to the water level signal. It is equipped with a controller that opens and closes the water supply valve to maintain the water level in this tank within a predetermined control water level range.The higher the water consumption, the higher the control water level range, and the water consumption. The lower the control water level range, the lower the control water level range can be set.

[0009]

[Function] The head pressure is detected by the pressure detector,
The water level in the aquarium is detected and this water level signal is sent to the controller. In this controller, the control water level range is set according to the amount of water consumed from this aquarium. Therefore, when the water consumption is large, the control water level range of this water tank is set high, and a large amount of water is constantly stored in this water tank. Therefore, even in the unlikely event of water interruption, the amount of water required for hygiene such as for flush toilets is secured. In this case, since the amount of water consumed is large, even if the amount of water stored in this tank is large, the rotation rate of this water, that is, the exchange rate does not decrease excessively, and the chlorine concentration decreases. Water quality will be secured without the occurrence of such problems.

When the water consumption is small, the control water level range of this water tank is set low. Therefore, the amount of water constantly stored in this water tank is small, and even if the water consumption is small, the rotation rate of water in this water tank, that is, the exchange rate, does not become excessively low, and the chlorine concentration decreases. The deterioration of water quality is prevented. In this case, since the amount of water consumed is small, even if the amount of water stored in this aquarium is small, the amount of water required for hygiene at the time of water interruption can be secured.

Further, in this device, since the water head pressure is measured by the pressure detector to detect the water level, the water level signal and the actual water level always maintain a proportional relationship, so that the above control is easy. Also, the water level detection accuracy is high, and accurate and reliable water level control is possible.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. This embodiment is a water level control device for water tanks of buildings, condominiums, schools, hospitals and the like. Although the actual device has different specifications depending on the type of building to be installed, etc., in order to facilitate the explanation, this embodiment has all the functions corresponding to various specifications. The device will be described. Of course, in an actual device, some functions may be omitted or other functions may be added according to the specifications.

Reference numeral 1 in the figure is a water tank. Tap water is supplied into the water tank 1 from the water supply pipe 3 through the water supply valve 2. A supply pipe 4 is connected to the bottom of the water tank, and the supply pipe 4 is connected to a pipe 5 on the consumer side at the end, for example, a water pipe for each house or a pipe for each tap.

A water level detector 10 is provided at the bottom of the water tank 1. The water level detector 10 detects the pressure, detects the water head pressure by this, and detects the water level in the water tank 1 from the water head pressure.

The signal from the water level detector 10 is sent to the controller 11. This controller 11 is installed in a building management room or the like. The controller 11 opens and closes the water supply valve 2 in response to the water level signal, and the water tank 1
It is configured to control the amount of water supplied therein and maintain the water level in the water tank 1 within a predetermined water level range, that is, a controlled water level range.

If the building or the like is a multi-tenant building, a public office, a company, a hospital, or the like, and a public toilet used by an unspecified number of people is provided, this toilet is provided according to the specifications. Flush valve 1 for regularly flushing toilet bowl 12
A signal is also sent to 3 to control the opening / closing of the cleaning valve 13.

In addition, in schools and the like, toilets are not used for a long period of time such as summer vacation, and the use of water is almost eliminated. When the device is installed in such a building, the program setter 14 is provided according to the specifications.

Next, the structure of the above water level detector 10 is shown in FIG.
Will be described. The water level detector 10 includes a casing 21. A water pressure detection port 22 is formed in the casing 21, and the water pressure detection port 22 is communicated with the inside of the water tank 1. Also, this casing 2
A flexible diaphragm 23 is provided in the casing 1, and the diaphragm 23 divides the inside of the casing 21 from the pressure detection port 22. The casing 21 is filled with the liquid 24, for example, silicone oil or the like, and the casing 21 has the pressure detecting element 2
5, the pressure detecting element 25 is immersed in the liquid 24. Further, a conductor wire 26 is connected to the pressure detecting element 25, and a signal is transmitted via the conductor wire 26.

The water level detector 10 includes a diaphragm 23.
By bending, the pressure in the water pressure detection port 11 and the pressure of the liquid 24 inside become substantially equal. Then, this pressure is detected by the pressure detection element 25, and this pressure is proportional to the head pressure, that is, the water level. Therefore, the output signal from the pressure detecting element 25 is proportional to the water level. Further, the water level detector 10 includes a pressure detecting element 25.
Since the water level is detected by, the water level can be accurately measured in units of several mm. Moreover, even if foreign matter or the like adheres to this, malfunction does not occur unless the water pressure detection port 22 is completely closed, and the reliability is high. Also, this one
Since the pressure detection element 25 is immersed in a liquid such as silicone oil, corrosion is not generated and reliability is high.

Next, the structure of the controller 11 will be described with reference to FIG. The controller 11 includes a CPU 31, a ROM
32, RAM 33, clock 36 and the like. Further, the controller 11 is provided with necessary switches 34 such as a mode selection switch and the like, and is also provided with various display portions 35, which display portion 35 has a set water level, in the case of this embodiment, a high water level. It includes a display for displaying four set water levels L1, L2, L3, L4 in order from.

Further, the CPU is provided with the water level detector 10, the valve drive circuit 38 for opening and closing the water supply valve 2 and the cleaning valve 13, the alarm device 39 such as a buzzer for outputting an alarm, and the program setting device. 14 etc. are each interface 3
It is connected via 7, and signals are input and output.

Next, the operation of the controller 11 will be described.
This embodiment operates in three modes depending on water consumption. It operates in the high mode when the water consumption is highest, in the medium mode when the water consumption is intermediate, and in the low mode when the water consumption is low.

For example, when this water level control device is installed in a resort condominium or the like, depending on the season, the occupants live up to almost full capacity. In such a case, the water consumption will increase significantly. In such a case, the controller 11 is operated in the high mode. When the high mode is set in step 31 as shown in the flowchart of FIG. 4, the water level L1 having the highest water level and the water level L2 having the second highest water level are set in step 32. Then, when the water level signal is input, it is compared with these set values in step 33, and L1
If higher, the water supply valve 2 is closed in step 34,
If it is lower than L2, the water supply valve 2 is opened in step 35. Therefore, in this high mode, the water level in the water tank 1 is maintained in the control water level range between L1 and L2.

When the number of occupants is medium, the water consumption is also medium, and in this case, the medium mode is set. In this medium mode, the aquarium 1
The internal water level is maintained within the control water level range of L2 and L3.

The number of residents may decrease depending on the season. In such a case, the consumption of water is also small, and in this case, the low mode is set. In this low mode, the water level in the aquarium 1 is L
A controlled water level range of 3 and L4 is maintained.

Therefore, when the water consumption is high,
A large amount of water is always stored in the water tank 1. Therefore, even if water is cut off, sufficient water for sanitary purposes, such as for flush toilets, will be secured until the water cut is restored. Further, since the amount of water used is large, the water in the water tank 1 is frequently exchanged, and even if a large amount of water is stored in this manner, the rotation rate of the water in the water tank 1, that is, the exchange. The rate does not decrease excessively, and deterioration of water quality such as decrease in chlorine concentration is prevented.

On the other hand, when the water consumption is small, the amount of water stored in the water tank 1 is always small. Therefore, even in this case, the rotation rate of the water in the water tank 1, that is, the exchange rate does not excessively decrease, and the deterioration of the water quality is prevented. In this case, since the amount of water consumed is small, even if the amount of water stored in the aquarium 1 is small, a sufficient amount of water necessary for hygiene can be secured even in the unlikely event of water interruption. ..

Of course, the above L1, L2, L3, L4
The water level is set to such a level that the above conditions are satisfied corresponding to the number of units in this condominium, the capacity of the water tank 1, and the like. These set water levels are displayed on the display unit 35, respectively. This setting is set when this water level control device is installed, and is set again later if necessary.

Further, the controller 11 has a function of automatically setting other than the above-mentioned mode setting manually. That is, as shown in FIG.
When the manual mode is selected in step 42, the manual mode is set in step 42. For example, a manager or the like determines the mode from the number of residents, and in step 43, the mode is manually selected.

When the automatic mode is selected in step 41, the rate of decrease of the water level per unit time is calculated from the temporal change of the water level signal in step 44, and the rate of decrease of the water level is the consumption of water. Corresponds to quantity. Then, in steps 45 and 46, when the water level decrease rate is larger than the predetermined set value R1, it is determined that the water consumption amount is large, and the high mode is automatically selected. In addition, the rate of decrease in water level is
When it is between 1 and a predetermined set value R2 smaller than this, it is determined that the water consumption amount is medium, and the medium mode is automatically selected. Further, when the rate of decrease of the water level is smaller than R2, it is determined that the water consumption amount is small, and the low mode is automatically selected.

As described above, by selecting the auto mode in advance, it is possible to automatically switch to the optimum mode in response to changes in water consumption, and it is not necessary for the manager to switch the mode each time. , Easy to operate,
Never forget to switch modes.

The controller 11 has a function of controlling the water level according to a preset program. That is, in schools, government offices, companies, etc.
It is operated according to a predetermined schedule, and the water consumption will be almost exhausted during a predetermined period such as summer vacation.
In such cases, according to the planned program,
It is convenient to switch the water level control mode and perform other water level control. For example, it is convenient to switch the water level control to the low mode at the end of the day before the holiday and switch the water level control to the high mode before the start of the day after the holiday. Further, during holidays, summer vacations, etc., toilets are almost never used. In such a case, the toilet bowl, piping, etc. will dry and foreign matter will stick, causing damage to the toilet bowl, piping, etc. In such a case, it is preferable to wash the toilet bowl at regular intervals to protect the toilet equipment even if the toilet is not used. Even in such a case, it is preferable to control the water level according to a program scheduled in advance.

The controller 11 includes a program setter 1
4 is attached. A preset program is input to the program setting device 14 by a punt card, a magnetic disk, or the like.

Then, as shown in FIG.
When the program control is selected by, the predetermined program is input from the program setter 14 in step 52.
Then, according to this program, in step 53, the water level control mode is switched to the low mode, for example, at the end of the day before a holiday. At the same time, during this holiday,
A mode for regularly cleaning the toilet bowl is selected.

When the elapse of a predetermined cleaning time is confirmed in step 54, the cleaning valve 1 of the toilet is cleaned in step 55.
A valve opening signal is sent to the drive circuit of No. 3, and this washing valve is opened to wash the toilet bowl 12.

Further, the water level control device of the present invention is provided with functions other than those mentioned above, if necessary. For example, if the water supply valve fails and cannot be opened or closed, the water level rises above
In addition, when the voltage drops further, a signal for operating the alarm device 39 such as a buzzer is output. Further, when the water level detector detects a pressure fluctuation of a short cycle, it is determined that an earthquake has occurred, an alarm is output, and the water supply valve can be automatically closed. Furthermore, the present invention is not limited to the above embodiment, and various other modifications can be made.

[0037]

As described above, according to the present invention, the control water level range in the water tank is changed in response to the fluctuation of the water usage amount. Therefore, when the water usage amount is large, a large amount of water is constantly stored in the water tank. A small amount of water is stored in the water tank when it is stored and the amount of water used is small. Therefore, in any case, the rotation rate of water in the aquarium is maintained at a predetermined value or more, deterioration of water quality such as a decrease in chlorine concentration is prevented, and the amount of water necessary for hygiene at the time of water interruption is secured. It

In the present invention, the head pressure is measured by the pressure, and the water level is detected by the head pressure. Therefore,
The signal from this water level detector and the water level are always maintained in a proportional relationship, the processing of this water level signal is easy, the above control is easily achieved, and the water level can be measured accurately, so a reliable and accurate water level can be obtained. Control becomes possible.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a water level detector.

FIG. 3 is a block diagram of a controller

FIG. 4 is a flow chart of water level control in the high mode.

[Fig. 5] Flow chart for mode selection

FIG. 6 is a flow chart in the case of program control.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Water tank 2 ... Water supply valve 10 ... Water level controller 11 ... Controller 25 ... Pressure detection element 31 ... CPU

Claims (4)

[Claims] 1. A water tank for storing water supplied from a water supply valve and supplying it to a consumer side at an end, and a water level detector provided at the bottom of the water tank for detecting the water level in the water tank by head pressure, A controller for receiving a signal from the water level detector and opening / closing the water supply valve in response to the water level signal to maintain the water level in the water tank within a predetermined control water level range, which is in the water tank. The control water level range in the aquarium is changed according to the amount of water consumed from the water tank. The larger the amount of water consumed from the aquarium, the higher the control water level range, and the amount of water consumed. The water level control device for a water tank is characterized in that the lower the control water level range, the lower the control water level range is set. 2. The controller operates in a plurality of modes corresponding to the amount of water consumed, and in each mode, a control water level range is set corresponding to the amount of water consumed. The water level control device for a water tank according to claim 1. 3. The controller detects the consumption of water from the aquarium and automatically selects the mode in accordance with the consumption of water. The water level control device for a water tank according to claim 2. 4. The water level detector includes a casing, and the casing is provided with a water pressure detection port, and the inside of the casing is partitioned from the water pressure detection port by a flexible diaphragm. 2. The water level control device for a water tank according to claim 1, wherein the liquid is filled with the liquid, and a pressure detecting element is provided in a portion of the casing filled with the liquid.