JPH0420617A - Water supply system of building - Google Patents

Abstract

PURPOSE:To reduce dead water and enable fresh water to be supplied by discharging water outside a feed water line, when a water level is detected either with a first water level detector of a second water level detector, and the chlorine of water in a water tank is detected with a chlorine density detector, and they come to values less than specified values. CONSTITUTION:A water receiving tank 2 is provided with float sensors 13, 14, and a high place water tank 3 is provided with float sensors 21, 22. In the period of using less water, the chlorine density of the water in the water tank 3 is reduced, and when it is detected by a chlorine density detector 24 that the density comes to a value equal to or less than a specified value, then the start of a storage pump 5 is stopped, and a cut-off valve 8 is released, and the water in the water tank 3 is discharged to a drain pipe 9. Besides, after discharging the water, a circuit switch 15 is changed over, and the storage pump 5 is started, and up to a water level to be detected by the float sensor 22, water is stored in the water tank 3. As a result, in the period of using the less water, water is kept on a water level lower than that in the period of using much water, and the water can be prevented from being standing for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water supply system for buildings, and particularly to a water supply system for buildings such as condominiums and hotels.

[Conventional technology]

Conventionally, as described in Japanese Patent Application Laid-Open No. 61-216943, a water level detector is provided in an elevated water tank, and a pump is operated in accordance with a detection signal output from the water level detector. A water supply system for a building that always maintains the water level in a water tank at a predetermined level has been proposed.

[Problem to be solved by the invention]

By the way, in the conventional building water supply system mentioned above,
It simply detects whether the water level in the tank is the lowest or highest level. On the other hand, for example, in condominiums and hotels in resort areas, the purpose of use is limited to summer escape, leisure, and sports, so during off-peak periods such as weekdays when there are fewer users, water remains unused in the tank for a long time. water.

There was so-called dead water, which caused sanitary problems.

An object of the present invention is to provide a water supply system for a building that can supply fresh water while minimizing dead water.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a first water level detector for detecting the water level in the aquarium, and by checking the first water level,
In a water supply system for a building that stores water in a water tank up to a water level, a second water level detector is installed in the water tank and detects a predetermined low water level that is lower than the first water level detector. a chlorine concentration detector for detecting the chlorine concentration of water in the water tank; and a selection means for selecting whether the water level is to be detected by the second water level detector or the first water level detector. and a discharge means for discharging the water in the high water tank to the outside of the water supply line when the detected value by the chlorine concentration detector falls below a predetermined value.

[Effect]

Since the present invention has the above configuration, during the off-season when there are few users, the amount of water stored at the water level decreases, so that the water does not remain stagnant for a long time, and the chlorine concentration in the water is kept below a predetermined value. Since the water in the tank is drained outside the water supply line, the water in the tank is always kept fresh without being affected by changes in the number of customers.

〔Example〕

Hereinafter, an embodiment of the water supply system for a building according to the present invention will be described based on the drawings.6 FIG. 1 is a block diagram showing an embodiment of the water supply system for a building according to the present invention.

The building water supply system of this embodiment shown in FIG. pump 5
and a water supply pipe 6 arranged from the elevated water tank 3 into the building 1,
It is comprised of a water tap 7 attached to the water supply pipe 6, a drain pipe 9 disposed from the water supply pipe 6 via a water stop valve 8, and a water tank 10 for storing water flowing out through the drain pipe 9.

The water tank 2 described above has a water supply pipe 11 that supplies water from the outside.
A water supply valve 12 provided with this water supply pipe 11 and a first water level detector for detecting the highest water level, such as a float sensor 1.
3, and a second water level detector, for example, a float sensor 14, which detects a predetermined water level lower than the water level. Note that the water supply valve 12 is detected by the float sensor 13, or
It constitutes a selection means that selects whether or not to perform detection using the float sensor 14 and opens and closes the water supply valve 12. A circuit switch 15 is provided to switch the connection circuit.

The high water tank 3 described above includes a first water level detector, for example, a float sensor 21, which detects the highest water level and outputs a stop signal to the pump 5, and a first water level detector, for example, a float sensor 21, which detects a predetermined water level lower than the water level. A second water level detector, for example, a float sensor 22, outputs a stop signal to the water pump 5.
A minimum water level detector, such as a minimum water level float sensor 23, detects the lowest water level due to water reduction in the elevated water tank 3 and outputs a start signal to the pump 5, and a minimum water level sensor 23 detects the chlorine concentration in the elevated water tank 3. When the chlorine concentration falls below a predetermined predetermined concentration, a stop signal is output to the water pump 5, the water stop valve 8 is opened, and the water in the elevated water tank 3 is discharged to the drain pipe 9 outside the water supply line. It is equipped with a chlorine concentration detector 24 and a water level detector, for example, an electrode rod 25, which detects the water level when all the water in the high water tank 3 is drained and outputs a start signal to the water pump 5.

The control panel 27 that controls the activation of the water pump 5 described above is connected to either one of the float sensors 21 and 22 via a circuit switch 26 that switches the connection circuit, and is connected to either the lowest water level detection float sensor 23 or the lowest water level detection float sensor 23. , are connected to the chlorine concentration detector 24 and the electrode rod 25. Water supply valve 12
The control panel 27 that controls the opening and closing of the water stop valve 8 is connected to one of the float sensors 13 and 14 via the circuit switch 15 that switches the connection circuit. It is connected to a chlorine concentration detector 24 and an electrode rod 25. Further, the above-mentioned circuit switch 26 constitutes another selection means for selecting either the detection by the float sensor 21 or the float sensor 22.

In this embodiment, the water tank 2 is
If the water supply valve 12 is left open, the water supply pipe 11 and the water supply valve 1
The circuit switch 15 is connected so that the float sensor 13 detects the highest water level of the water tank 2 when water is supplied from the outside to the water tank 2 via the float sensor 13 and outputs a signal to the control panel 27. That is, water is stored in the water tank 2 up to the highest water level detected by the float sensor 13. In addition, when the float sensor 21 of the elevated water tank 3 detects the water level, the control panel 2
If the circuit switch 26 is connected to output a signal to the float sensor 7, the water pump 5 will be activated when the water in the high water tank 3 decreases to the water level of the float sensor 23 as water is used. That is, water is stored in the high water tank 3 up to the highest water level detected by the float sensor 21.

When water usage is low, the water in the elevated aquarium 3 is not used for a long time and the chlorine concentration decreases, so the chlorine concentration detector 24 detects that the chlorine concentration has fallen below a predetermined predetermined level. Detects the signal and outputs a signal to the control panel 27. In response to the output of the signal, the control panel 27 stops the activation of the water pump 5, opens the water stop valve 8, and discharges the water in the elevated water tank 3 to the drain pipe 9. Moreover, when all the water in the high water tank 3 is drained, the electrode rod 25 detects the water level and the control panel 2
7, the control panel 27 switches the connection of the circuit switch 15 so that the float sensor 14 detects the water level and outputs a signal, and connects the circuit switch 26 so that the float sensor 22 detects the water level. At the same time, the water pump 5 is activated to store water up to the water level detected by the float sensor 22 of the high water tank 3. Also, when water usage increases, the control panel 27 allows the circuit switch 15 to be set so that the float sensor 13 detects the water level, and the circuit switch 26 is set so that the float sensor 21 detects the water level. Connect to detect.

In the embodiment configured in this way, the water receiving tank 2, the elevated water tank 3
Since water can be maintained at a lower water level during periods when water is used less than when it is used frequently, it is possible to prevent water from stagnating without being used for a long time, that is, from becoming dead water.

〔Effect of the invention〕

Since the present invention is configured as described above, when the chlorine concentration in the aquarium decreases during periods when water usage is low, the water is drained and the water level is lowered from the water level during periods when there is more water. Can keep water inside. Therefore, even in buildings where the purpose of use is limited and the number of users is concentrated, such as condominiums and hotels in resort areas, fresh water can be supplied during the off-season when there are fewer users, so it can be used for a long time. This has the effect of preventing the occurrence of water that stagnates without being drained, so-called dead water, even when unattended.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a water supply system for a building according to the present invention. 1...Building, 2...Water tank, 3...
...Elevated water tank, 5...Storage pump, 8...
... Water stop valve, 11 ... Water supply valve, 13.14.
21.22.23...Group/Water level detector. 15゜26...Circuit switch, 24...Chlorine concentration detector, 25...Electrode rod, 27...Control panel.

Claims (1)

[Claims] (1) A water supply system for a building in which a water tank is provided with a first water level detector for detecting the water level, and water is stored in the water tank up to the water level detected by the first water level detector. a second water level detector that detects a predetermined low water level that is lower than the first water level;
Water level is detected by a chlorine concentration detector that detects the chlorine concentration of water in the water tank and the second water level detector;
a selection means for selecting whether to perform water level detection by the first water level detector; and a detection value by the chlorine concentration detector,
1. A water supply device for a building, comprising: a discharge means for discharging water in a water tank to the outside of a water supply line when the water falls below a predetermined value.