JP6860898B2 - Initial rainwater removal device and rainwater tank device equipped with it, communication network of rainwater tank device, initial rainwater removal method - Google Patents

Description

The present invention relates to an initial rainwater removing device.

In recent years, the number of guerrilla rainstorms and local heavy rains due to the effects of global warming has increased, and with the effects of urbanization accompanying the development of civilization, urban floods have occurred in various parts of Japan. It is becoming more frequent.

In response to such drastic changes in the natural environment, the "Act on Promotion of Rainwater Use" was enforced in May 2014 in Japan. This law aims to control the outflow to sewers and rivers while effectively utilizing rainwater as a resource, and promotes the spread of rainwater use by mandating the use of rainwater at the facilities of the national government and incorporated administrative agencies. It is the responsibility of. Although rainwater utilization (utilization) is expected to attract more attention due to the operation of this law, there is almost no verification by a uniform method for the technology related to it, and it is standardized by the Japanese Industrial Standards (JIS) etc. There is no such thing.

When rainwater is stored in a rainwater storage tank (hereinafter referred to as a rainwater tank) and used for some purpose, the water quality is the most important issue. In the process of falling from the formation of raindrops to the ground, rain falls while taking atmospheric aerosol particles into the raindrops, so the degree of pollution is particularly high in the rain that begins to fall. In addition, the rainwater flowing out to the gutter also includes dirt accumulated on the roof surface, which is the rainwater collecting surface. Therefore, initial rainwater control is one of the most important elemental technologies for keeping the water quality in the rainwater tank clean.

Currently, several types of products are generally sold as initial rainwater equipment, but the initial rainwater removal equipment was contaminated by pollutants in the air in the process of guiding the rainwater that flowed into the gutter from the roof surface to the rainwater tank. It is a device for eliminating initial rainwater and taking in rainwater with better water quality. Below, the conventional initial rainwater removal devices intended for use in detached houses are classified according to their functions and removal methods.

[Functions and classification of initial rainwater removal device]
The initial rainwater removing device used in the detached house is attached to a gutter to remove contaminants such as initial rainwater and fallen leaves when guiding rainwater to a storage tank. Initial rainwater removal is an accessory function of the water intake device and is expressed as "initial rainwater removal device", but in reality, there is no device on the market that only removes initial rainwater.

(1) Drainage hole method
As shown in FIG. 6, a method of receiving initial rainwater by an intake cup in the device and gradually removing it from a hole provided at the bottom thereof is referred to as a “drainage hole method”.

In this method, the rainwater received by the intake cup in the device is guided to the storage tank, but at that time, a certain amount of rainwater is drained from the "rainwater drainage hole" provided in the intake cup, and the amount of rainwater that exceeds the drainage amount is drained. Is collected in the intake cup and gradually led to the rainwater storage tank (Fig. 6). Although the structure is such that the initial rainwater removal amount can be adjusted by the diameter of the "initial rainwater drainage hole", there is no commercially available product that can be adjusted.

In the drainage hole method, a certain amount of rainwater is always drained by the "initial rainwater drainage hole" provided in the intake cup, so a certain amount of rainwater has passed since the beginning of the rain and even after the quality of the rainwater has improved. Rainwater will continue to be drained. In addition, in the case of rainfall that gradually becomes stronger from the beginning of rainfall, a certain initial rainwater removal effect is observed, but in the case of a large catchment area or in the case of localized torrential rain, which has tended to occur frequently in recent years, a large amount of rainwater occurs at once. Rainwater flows into the device, and the initial rainwater cannot be sufficiently removed.

(2) Storage method
Next, as shown in FIG. 7, a method of storing and removing a certain amount of initial rainwater in the apparatus is called a “storage method”.

In this method, the initial rainwater is temporarily stored in the "initial rainwater pool", and the excess rainwater is guided to the rainwater storage tank (Fig. 7). The amount of initial rainwater removed can be adjusted by increasing or decreasing the capacity of the initial rainwater pool. You can do it. The orifice provided in the initial rainwater pool not only adjusts the amount of initial rainwater removed, but also automatically drains the rainwater in the initial rainwater pool after the end of rainfall and returns the device to the state before rainfall. Also have.

The storage method compensates for the disadvantage of the "drainage hole method", which always drains a certain amount by providing an "initial rainwater pool", but if the orifice is clogged with dust, the initial rainwater removal effect can be obtained. The drawback of not having it is the same as the "drainage hole method". In addition, compared to the "drainage hole method", the structure is complicated and maintenance is difficult, and malfunctions are likely to occur due to inadequate maintenance. In addition, depending on the amount and momentum of rainwater flowing into the device, rainwater in the initial rainwater pool may flow into the storage tank.

Further, Patent Documents 1, 2, 3 and the like are disclosed as the initial rainwater removing device of this storage method. However, the following problems have not been solved in either case.
(A) The initial amount of contaminated rainwater varies depending on the size of the building (roof, etc.), but the amount of initial rainfall to be separated cannot be easily adjusted. Therefore, it is necessary to determine the size (capacity) of the initial rainwater storage tank according to the size of the roof or the like.
(B) Since the capacity of the initial rainwater storage tank is always constant, it is not possible to store and drain rainwater after the initial stage according to the purpose of water storage (for clean water, sewage, spraying, simple drainage, etc.).
(C) Since computer control is not possible, it is not possible to flexibly adjust the initial amount of rainwater storage according to the rainfall conditions such as the degree of precipitation pollution (yellow sand, etc.) and the intensity of precipitation. That is, it is not possible to respond to changes in the degree of pollution of rainwater due to rainfall intervals.

(3) Flow velocity utilization method
Finally, a method of removing the initial rainwater by using the flow velocity difference as shown in FIG. 8 was defined as a “flow velocity utilization method”.

This method utilizes the fact that the flow velocity is low because the amount of rainfall flowing through the device is small at the beginning of the rain, and the amount of water increases and the flow velocity increases with the elapsed time. It is drained because it flows down, and when the flow velocity exceeds a certain level, it flows far away and is guided to the rainwater storage tank (Fig. 8).

Patent Documents 4 and 5 and the like are disclosed about this method. Unlike the above-mentioned two methods, the initial rainwater removal ability can be exhibited regardless of whether or not the equipment is maintained. However, on the other hand, it must be said that it is difficult to remove the initial rainwater by this method because the flow velocity difference of the rainwater flowing in the device tends to occur due to the difference in the conditions such as the catchment area and the shape and size of the gutter. I don't get it. Further, as in the "drainage hole method", the initial rainwater removal capacity does not function sufficiently even when a large amount of rainwater flows through the device at once due to a locally concentrated torrential rain or the like.

Japanese Unexamined Patent Publication No. 8-158416 Japanese Unexamined Patent Publication No. 2003-268812 Japanese Patent No. 4861076 Japanese Unexamined Patent Publication No. 2001-123484 Japanese Unexamined Patent Publication No. 2003-253705 Patent 5769266

When the initial rainwater devices were classified in this way and their characteristics were compared, it was found that there are no products that have advantages and disadvantages, and that the initial rainwater removal ability can be uniformly exhibited under any conditions. On the other hand, with the enforcement of the "Act on Promotion of Rainwater Utilization" aimed at controlling the outflow of rainwater while using rainwater as a water resource, various technologies related to rainwater utilization are required.

From the above, in the present invention, with respect to the initial rainwater removing device, which is the most important device constituting the rainwater utilization system, it is possible to improve the problems of the conventional device and collect clean rainwater efficiently and accurately. We propose a new initial rainwater removal device. In addition, we propose a rainwater tank device that links a rainwater tank and an initial rainwater removal device with a computer, and further provide a communication network that connects a plurality of rainwater tank devices to computer devices for disaster prevention and weather.

The initial rainwater removing device according to the present invention relays between a gutter attached below the roof of the building and a rainwater tank in order to drain rainwater to the building, and is connected to the gutter and connected to the gutter. The main body including a water collecting port for collecting rainwater from a gutter, a drainage port capable of draining rainwater collected from the water collecting port, and a water injection port connected to the rainwater tank to allow water to flow is the collection. A storage type initial rainwater removing device capable of storing rainwater to the position of the water injection port and injecting rainwater beyond the position of the water injection port into the rainwater tank from the water injection port.
A water level sensor equipped with a communication device capable of measuring the water level h (t) from the drain port, a computer capable of transmitting and receiving the water level sensor, and a drainage means capable of opening and closing the drain port by a signal received from the computer. The water level sensor senses the water level h (t) of the rainwater stored in the main body and transmits the water level h (t) to the computer, and the computer receives the received water level h (t). ) in accordance with, the drainage means, the opening signal _{S OP} or sends a closing signal _{S CL,} the opening signal _{S OP} or the drainage means receiving the closure signal _{S CL} is, the signal _{S OP} or S and the received _The drain port is opened and closed according to the CL to store and drain rainwater.

In the initial rainwater removing device according to the present invention, the main body is a container having a bottom portion, an upper bottom portion, and a side portion connecting the two, and the position of the drainage port arranged near the bottom portion is set to 0 in height. , the height of the water inlet is a predetermined height H _th, a the initial rainwater removal device,
Connecting the collector Mizuguchi the Tatetoi, wherein the water inlet disposed in the predetermined height H _th from the drain outlet connected to the rainwater tank, said drainage means which receives the closing signal S _CL from the computer There was closed the drain outlet, the rainwater exceeds the predetermined height H _th and stored in the body may be injection from the injection port into the rainwater tank.

In the initial rainwater removing device according to the present invention, the main body has the drainage port (height 0), and is a container A (hereinafter, also referred to as an “introduction pipe”) and a container B arranged in parallel with the container A. (Hereinafter, also referred to as “drainage pipe”) is a U-shaped pipe capable of passing water by connecting below each pipe by a water passage pipe, and the introduction pipe (container A) has an upper bottom portion a and a water passage pipe. It has a side portion a and a bottom portion a, a water collecting port 22 is provided in the vicinity of the upper bottom portion a, is connected to the vertical trough and arranged in the vertical direction, and rainwater is collected from the vertical trough.
The discharge pipe (container B) has an upper bottom portion b, a side portion b, and a bottom portion b, and the water level sensor is installed on the inner wall of the side portion b to provide a water level from the drain port (height 0). Measure h (t) and
The water injection port for injecting water into the rainwater tank is provided at the predetermined height _Hth of the main body, and the vicinity (including the bottom a and the bottom b) of the main body (including the bottom a and the bottom b) is provided (side a and b). (Including) may be provided with the drainage port (height 0).

The initial rainwater removing device according to the present invention may be provided with a spare water storage pipe in the vertical direction from the water passage pipe of the U-shaped pipe.

In the initial rainwater removing device according to the present invention, the drainage means connects a pulling mechanism provided on the upper bottom portion of the main body and a lid portion for opening and closing the drainage port by a connecting mechanism, and the opening is opened from the computer. the pulling mechanism which receives the signal S _OP or closing signal S _CL is, the lid may be opened and closed via the coupling mechanism.

In the initial rainwater removal apparatus according to the present invention, the drainage means has a communication function, from the computer, which can open and close the drain outlet to receive the opening signal S _OP or closing signal S _CL, electric controllable It may be a switch (hereinafter, also referred to as a “valve”).

In the initial rainwater removing device according to the present invention, the water level sensor has a communication function and can float and sink together with the water level h (t) between _{the height of the drain port near 0 and the height H th of the water injection port.} It may be a water level measurement type or a local water level measurement type water level sensor attached at at least one location near the height 0 of the drain port and the height H _{th of the water injection port, and at least the water level h (t) = H. It} is preferable to be able to sense th (predetermined height) and transmit it to the computer.

In the initial rainwater removal apparatus according to the present invention, the water level sensor has a communication function, between the height H _th of the water inlet height 0 of the drain outlet, disposed along the inner wall of the body A capacitive water level sensor may be used so that the water level h (t) can be sensed and transmitted to the computer.

The rainwater tank device provided with the initial rainwater removing device according to the present invention is a first electric pump in which the rainwater tank receives rainwater injected from the water injection port of the initial rainwater removing device beyond the position of the water injection port. The first rainwater tank with the
It has a second rainwater tank to which a second electric pump is attached, which is connected to the first rainwater tank by a water pipe and is capable of passing water.
When the water stored in the first rainwater tank reaches a certain height, rainwater exceeding the certain height can be injected into the second rainwater tank via the water pipe.
The first electric pump supplies water at the water quality level immediately after the initial rainwater removal by the initial rainwater removal device.
The second electric pump can supply water having a higher water quality level than the first electric pump.

In the rainwater tank device provided with the initial rainwater removing device according to the present invention, the rainwater tank that receives rainwater injected beyond the position of the water injection port from the water injection port of the initial rainwater removing device is the rainwater at time t. Obtained from a sensing sensor capable of detecting data Ω (t) including any one or more of the water storage amount, the water storage speed, the drainage amount, and the drainage speed inside the tank, a transmission / reception device capable of transmitting / receiving by wire or wirelessly, and the transmission / reception device. A rainwater tank device equipped with an automatic opening / closing valve equipped with a control device for analyzing information.
The data Ω (t) sensed by the sensor can be transmitted from the transmission / reception device to the computer provided by the initial rainwater removing device, and the control device analyzes the information received by the transmission / reception device from the computer. It is a rainwater tank device provided with an initial rainwater removing device capable of opening and closing the automatic opening / closing valve.

In the rainwater tank device provided with the initial rainwater removing device according to the present invention, in the rainwater tank device, the first rainwater tank and / or the second rainwater tank constituting the rainwater tank is the sensing sensor and the transmitting / receiving device. And the automatic opening / closing valve.

The rainwater tank device communication network provided with the initial rainwater removing device according to the present invention is a rainwater tank device provided with a plurality of the initial rainwater removing devices installed in various places such as general households, business establishments and public works establishments in a wide area town. Is a network formed by
It is possible to acquire each of the computers, meteorological data, and river data provided in the initial rainwater removal devices of the plurality of rainwater tank devices, and based on the data, local areas where the plurality of rainwater tank devices exist are localized. A computer device that can calculate weather information and river information,
Is connected to a public line network or an inter-node communication network, and the computer device and a plurality of rainwater tank devices installed in the various places can communicate with each other.

The initial rainwater removal method according to the present invention is
(1) Steps to prepare the above initial rainwater removal device and
(2) A storage step in which the computer capable of measuring time stores a predetermined number of cycles N in advance.
(3) When the water level sensor detects the water level h (t) = H _th (predetermined height), the saturated water level signal S _th is transmitted to the computer, and the computer receiving _{the saturated water level signal S th sends the opening signal TOP} . A drainage step that transmits to the drainage means, and the drainage means opens the drainage port to drain water.
(4) _{A water storage start step in which the computer transmits the closing signal SCL} to the drainage means, and the drainage means closes the drainage port to start water storage.
(5) An initial rainwater removal cycle repetition step in which the initial rainwater removal cycle consisting of the continuous drainage step and the water storage start step is repeated N times, and
(6) the rainwater exceeds the predetermined height H _th and water in the body, to start water injection from the injection port into the rainwater tank, a water injection step,
including.

The initial rainwater removal method according to the present invention is
(1)'In the step of preparing the initial rainwater removing device, the water level sensor of the initial rainwater removing device can detect the water level h (t) = 0 (height of the drainage port).
(4)'The water storage start step is
When the water level sensor senses the water level h (t) = 0 (the height of the water outlet), and sends a zero level signal S ₀ in the computer, the computer is the closing signal S _CL which receives the said drainage means It is preferable that the drainage means closes the drainage port and starts water storage by transmitting.

The initial rainwater removal method according to the present invention is
(11) Steps to prepare the initial rainwater removal device and
(12) A storage step in which a computer capable of measuring time stores a predetermined number of cycles N and a predetermined time interval ΔT _{1 in advance.}
(13) When the opening signal _TOP is received from the computer, the drainage means opens the drainage port to drain the water, and the drainage step.
(14) When the water level sensor detects the water level h (t) = 0 (height of the drain port), the zero water level signal S ₀ is transmitted to the computer, and the computer receiving this sends the closing signal _SCL to the drainage. A water storage start step of transmitting to the means, in which the drainage means closes the drainage port and starts water storage,
(15) When the water level sensor detects the water level h (t) = H ₀ (≧ 0), the computer that receives the detection signal from the water level sensor sets the reception time t at which the detection signal is received as the measurement start time t. _The measurement time setting step to be set in s and
It is an initial rainwater removal method including
When the water level sensor detects the water level h (t) = H _th (predetermined height),
(16)
(16-1) if _t <t _s + ΔT _1, the computer, by one increases the number of cycles k,
(16-2) If t> t _s + ΔT ₁ , the computer resets the number of cycles k to 0.
Cycle count step and
(17)
(17-1)
If the number of cycles is k <N, the computer _{transmits an opening signal TOP} to the drainage means, and includes a drainage step (13), a water storage start step (14), and a measurement time setting step (15). Initial rainwater drainage step or
(17-2)
When the number of cycles k ≧ N, the water injection step of starting to inject rainwater exceeding the _{predetermined height Hth into the rainwater tank from the water injection port,}
Includes a determination step to perform any of the above.

In the initial rainwater removal method according to the present invention,
(12) The storage step is
(12-1) The time-measurable computer includes a step of storing _{ΔT 2} (ΔT ₁ <ΔT _{2) in advance.}
(18) When t = t _s + ΔT ₂ elapses,
The reset drainage step, wherein the computer _{transmits an opening signal TOP} to the drainage means to perform the drainage step (13), the water storage start step (14), and the measurement time setting step (15).
Can be further included.

In the initial rainwater removal method according to the present invention, the (18) reset drainage step performs the drainage step of (13), the water storage start step of (14), and the measurement time setting step of (15), and sets the number of cycles k to 0. You may want to reset it to.

In the initial rainwater removal method according to the present invention, the (18) reset drainage step is
(18-1)
(18-1-1) The computer does not receive the saturated water level signal S _th that senses the water level h (t) = H _{th (predetermined height) from the water level sensor within t = t s} + ΔT _1. In the non-precipitation state, the number of non-precipitation periods m is set to m = m + 1.
(18-1-2) The computer received the saturated water level signal S _th that sensed the water level h (t) = H _{th (predetermined height) from the water level sensor within t = t s} + ΔT _1. In the case of rainfall, the non-precipitation period m is set to m = 0.
Including non-precipitation period count steps
(12) The storage step is
(12-2) A step in which the time-measurable computer stores the cycle number N as the cycle number N (m · ΔT _{2 ) which is a function of the product of the non-precipitation period number m and the time interval ΔT 2.} , May be included.

The initial rainwater removing device according to the present invention can store rainwater collected in its main body up to the height of a water injection port for injecting water into a rainwater tank, and drains using a drainage means capable of communicating with a computer provided therein. can do. In particular, if a water collection port and a drainage port for collecting rainwater are arranged at the bottom, and if the water injection port is arranged at a higher position and connected to the rainwater tank, impurities having a large specific gravity will settle at the bottom. Only high quality rainwater with no impurities can be injected into the rainwater tank.

The computer can manage the water level h (t) of the main body by communicating with the water level sensor provided in the main body. Therefore, the computer can freely control the storage and drainage of rainwater by transmitting a signal to the drainage means according to the water level h (t).

Therefore, according to the initial rainwater removing method according to the present invention, the initial rainwater or contaminated rainwater stored in the main body of the initial rainwater removing device can be drained for N cycles, for example, and then poured into the rainwater tank from the water injection port. Only very clean, high quality rainwater can be stored in the rainwater tank.

In the rainwater tank device provided with the initial rainwater removing device according to the present invention, the main body of the initial rainwater removing device and the rainwater tank can be linked via a computer, so that, for example, the elapsed time from the end of the previous rainfall is short. When it is expected that the initial rainwater is less contaminated, adjustments such as reducing the number N of initial rainwater removals in the initial rainwater removing device can be made to store rain more efficiently.

The rainwater tank device communication network provided with the initial rainwater removing device according to the present invention enables communication between, for example, a computer device for weather or disaster and a rainwater tank device installed at each of the above locations. Therefore, for example, a computer device that collects meteorological data, river data, and the like can collect and analyze data Ω (t) such as the amount of water stored from each rainwater tank device. As a result, local weather information and river information in the area where the rainwater tank device is installed can be calculated and predicted, and instructions regarding drainage and water storage can be given to each rainwater tank device in the area, for example.

The schematic diagram of the initial rainwater removal apparatus which concerns on this invention. The schematic diagram of the 1st Embodiment of the initial rainwater removal apparatus which concerns on this invention. The schematic diagram of the 2nd Embodiment of the initial rainwater removal apparatus which concerns on this invention. The perspective view of the initial rainwater removal apparatus which concerns on this invention. The schematic diagram of the communication network which comprises the rainwater tank apparatus provided with the initial rainwater removal apparatus which concerns on this invention. Schematic diagram of the conventional drainage hole type initial rainwater removal device. Schematic diagram of the initial rainwater removal device of the conventional storage method. Schematic diagram of the initial rainwater removal device of the conventional flow velocity utilization method. The flow chart of the initial rainwater removal method which concerns on this invention. Evaluation device for conventional initial rainwater removal equipment. Schematic diagram of a commercially available initial rainwater removal device according to (a) product A (drainage hole method), (b) product B (flow velocity utilization method), and (c) product C (storage method), respectively. FIG. 6 is a relationship diagram of an assumed rainfall intensity, a water intake rate, and a water intake amount in an embodiment of a conventional initial rainwater removal device (product A, product B). The front view of the rainwater tank apparatus provided with the initial rainwater removal apparatus which concerns on this invention. The schematic diagram of the rainwater tank apparatus provided with the initial rainwater removal apparatus which concerns on embodiment of this invention. The computer control of the initial rainwater removal apparatus 1 which concerns on embodiment of this invention, and the schematic diagram of the water consumption measurement. The front view of the remote type water amount meter and the data logger for recording which concerns on embodiment of this invention. The circuit diagram of the computer which concerns on embodiment of this invention.

I. [Initial rainwater removal device]
Hereinafter, embodiments of the initial rainwater removing device according to the present invention will be described with reference to the drawings. In the following drawings, the same reference numerals shall be used for the same components.

As shown in FIG. 4, the initial rainwater removing device 1 according to the present invention has a gutter 1012 and a rainwater tank 100 attached below the roof 1002 of the building 1000 in order to drain the rainwater to the building 1000. Relay.

As shown in FIG. 1, the main body 10 of the initial rainwater removing device 1 of the present invention has a water collecting port 22 for collecting rainwater from a gutter 1012 (see FIG. 4) connected to an eaves gutter 1010 below the roof 1002. A drainage port 26 capable of draining rainwater collected from the water collection port 22 and a water injection port 24 connected to the rainwater tank 100 to allow water to flow are provided. The initial rainwater removing device 1 of the present invention can store the collected rainwater up to the position of the water injection port 24, and can inject rainwater beyond the position of the water injection port 24 into the rainwater tank 100 from the water injection port 24. It is a storage type initial rainwater removal device. In FIG. 1, the main body 10 has a cylindrical shape, but in the present specification, the shape of the main body 10 is not particularly limited.

Further, as shown in FIG. 1, the initial rainwater removing device 1 includes a water level sensor 50 provided with a communication device capable of measuring the water level h (t) from the drain port 26, and a computer 70 capable of transmitting and receiving to and from the water level sensor 50. When, a, and drainage means 60 capable of opening and closing the drain port 26 by a signal received from the computer 70 (below opening signal _{S OP,} closed signal _{S CL).}

Then, the water level sensor 50 senses the water level h (t) of the rainwater stored in the main body 10 and transmits the water level h (t) to the computer 70, and the computer 70 responds to the received water level h (t). Te, drainage means 60, and sends an opening signal _{S OP} or closing signal _{S CL,} drainage means 60 receives the opening signal _{S OP} or closing signal _{S CL,} in response to the signal _{S OP} or _{S CL} and the received By opening and closing the drain port 26, the initial rainwater removing device 1 can store and drain rainwater.

[Embodiment]
In the embodiment of the present invention shown in FIG. 1, the main body 10 is a container having a bottom portion 16, an upper bottom portion 12, and a side portion 14 connecting the two, as shown in FIG. 4, for example, the above-mentioned structure. Install in the vertical direction approximately parallel to 1000. The position of the drain outlet 26 arranged in the bottom 16 near the height 0, the height of the upper base portion 12 of the initial rainwater removal device H _T, the height of the predetermined height H _th of water inlet 24.

Therefore, when connecting the current water inlet 22 disposed near the upper bottom 12 on Tatetoi 1012, a water inlet 24 which is disposed at a predetermined height H _th from the drain port 26 is connected to the rainwater tank 100, in this embodiment the initial rainwater removing apparatus 1, after the water discharge means 60 which has received the closing signal S _CL from the computer 70 it has closed the discharge port 26, the rainwater and stored in the main body 10 exceeds a predetermined height H _th, rainwater from water inlet 24 Water can be injected into the tank 100.

That is, for example, in the embodiment of FIG. 1, the water level sensor 50 is _{attached near the height position (water level h (t) = H th} ) of the water injection port 24, and when the water level sensor 50 detects the water level, the computer 70 The drainage means 60 _{receives the opening signal TOP} and drains the water. _{After that, the computer 70 transmits a closing signal SCL} to the drainage means 60 at an appropriate fixed time interval, for example, and rainwater is stored in the main body 10. When such an initial rainwater drainage process is repeated, for example, a predetermined N times, the computer 70 stops _{the opening signal TOP} transmission to the drainage means 60 even if the _{water level sensor 50 detects the water level h (t) = Hth.} and, rainwater exceeding the predetermined height H _th, can be injection from the water inlet 24 into the rainwater tank 100.

Hereinafter, each component of the initial rainwater removing device 1 according to the present invention will be described.

As the drainage means 60, it is preferable to use an electrically controllable switch (hereinafter, also referred to as “valve”) such as a solenoid valve. Electrical controllable valve initial rainwater removal device 1 of the present invention is employed as a drainage means 60 has a communication function, the computer 70, the drain outlet 26 to receive the opening signal S _OP or closing signal S _CL It can be opened and closed.

As a simpler example, in the drainage means 60, as shown in FIG. 1, a pulling mechanism 62 provided on the upper bottom portion 12 of the main body 10 and a valve lid portion 66 for opening and closing the drainage port 26 are connected to a wire 64 (connecting mechanism). ) Or the like. Pulling mechanism 62 from the computer 70, as described above receives an opening signal _{S OP} or closing signal _{S CL,} it is possible to open and close the lid 66 via wire 64 a (coupling mechanism). As the lid portion 66, a rubber stopper or the like may be used. Further, the pulling mechanism 62 may be configured by a solenoid, a servo, or the like.

Further, the water level sensor 50 is a float type float type water level that can float and sink together with the water level h (t) in the main body 10 between the vicinity of the height 0 of the drain port 26 and the vicinity of the height H _{th of the water injection port 24.} Sensor 50 can be used (not shown). Or, the water level sensor 50, as shown in FIG. 1, may be a water level sensor 52 of the local water level measurements type mounted on at least one point of the height H _th vicinity of the water inlet 24 (52u). It is desirable that the local water level measurement type water level sensor 52 can detect at least the water level h (t) = H _th (predetermined height) in this way, and as shown in FIG. 2, the height of the drain port 26 is 0. Local water level measurement type water level sensors 52 (52u, 52d) are attached at two locations near the height of the water injection port 24 and near the height H _th , and the water level h (t) = 0 (height of the drain port) and the water level h (t). ) = H _th (predetermined height) may be sensed.

Alternatively, the water level sensor 50, as shown schematically in Figure 2, between the height H _th vicinity of the height 0 near the water outlet 26 water inlet 24, the electrostatic capacitance which is installed along the inner wall of the body 10 The type water level sensor 54 may be used. If the capacitive water level sensor 54 is used as the water level sensor 50, the computer 70 capable of communicating with the water level sensor 50 can grasp the water level h (t) of the main body 10 at any time.

The initial rainwater removing device 1 of the present invention according to the first embodiment is shown in FIG. In the initial rainwater removing device 1 according to the first embodiment, the main body 10 has a drainage port 26 at a height of 0, and is arranged in parallel with the container A (hereinafter, also referred to as “introduction pipe 10a”). It is a U-shaped pipe capable of passing water by connecting the container B (hereinafter, also referred to as “drainage pipe 10b”) to the water passage pipe 10c below each pipe.

The introduction pipe (container A) 10a has an upper bottom portion 12a, a side portion 14a, and a bottom portion 16a, a water collecting port 22 is provided in the vicinity of the upper bottom portion 12a, and the water collecting port 22 is connected to the gutter 1012 and arranged in the vertical direction. Then, rainwater is collected from the gutter 1012 (see FIG. 4).

The discharge pipe (container B) 10b has an upper bottom portion 12b, a side portion 14b, and a bottom portion 16b. A water level sensor 50 is installed on the inner wall of the side portion 14b, and the water level sensor 50 is installed from the drain port 26 (height 0). The water level h (t) is measured.

As shown in FIG. 1 described above, since the drainage port 26 is usually provided at the bottom 16 (or the side 14 in the vicinity thereof) of the main body 10, the water level h (t) of the rainwater stored in the main body 10 and the upper bottom 12a the height H _T, etc. height H _th water injection port 24 _{(predetermined} height), it is preferable to measure the water outlet 26 as a reference (height 0). Therefore, even when the main body 10 as in the first embodiment is a U-shaped pipe, the drain port 26 is located at or near the bottom 16 of the main body 10 including the bottom 16a and the bottom 16b (including the side 14a and the side 14b). Is provided, and the height thereof is preferably set to 0. In the example of FIG. 2, the drain port 26 is provided directly below the bottom 16b of the drain pipe (container B) 10b, and the height thereof is set to 0. In this way, "providing the drainage port 26 near the bottom portion 16 of the main body 10" means "providing the drainage port 26 near the bottom portion 16 of the main body 10 and the bottom portion 16 such as the bottom portion 16 immediately below the main body 10 or the side portion 14 immediately thereof." It is synonymous with "providing".

Further, as described above, _{the water injection port 24 for injecting water into the rainwater tank 100 is provided at the predetermined height Hth} of the main body 10, but in the first embodiment, as shown in FIG. 2, the introduction pipe (container) is provided. A) A water injection port 24 is provided on the side portion 14a of 10a.

In the initial rainwater removing device 1 according to the first embodiment, for example, the drainage means 60 includes a pulling mechanism 62 provided on the upper bottom portion 12b of the discharge pipe 10b and a lid for opening and closing the drainage port 26 of the bottom portion 16b of the discharge pipe 10b. a part 66, connected by the connecting mechanism 64, the computer 70, the opening signal _{S OP} or closing signal _{S CL} pulling mechanism 62 which receives the can can be opened and closed the lid portion 66 via a coupling mechanism 64.

As shown in FIG. 2, a spare water storage pipe 10d may be provided in the vertical direction from the water passage pipe 10c of the U-shaped pipe (main body 10). By providing the spare water storage pipe 10d, the water storage capacity of the main body 10 can be increased, and the number of times the drain port 26 is opened and closed by the drainage means 60 in order to drain the contaminated initial rainwater can be reduced.

Further, as the water level sensor 50, the position of the height H _th water injection port 24 of the height of the water outlet 26 (height 0) and the discharge pipe 10b, respectively may be installed to the water level sensor 52 of the local water level measurements type. 2 is displaying a water level sensor 52 of the local water level measurements type, the upper mounting level sensor 52u installed in height H _th, the lower mounting level sensor 52d installed in height 0. The upper mounting level sensor 52u, whether the water level h (t) has reached a predetermined height H _th, lower attachment level sensor 52d is the water level h (t) is the height 0 of drain outlet 26 It senses whether or not the sensor 52d has increased to the installation position, and when it senses the water level, it sends, for example, a switch-on signal to the computer 70.

Alternatively, a water level sensor 50, between the height H _th water injection port 24 and the height of the water outlet 26 (height 0), be equipped with capacitive level sensor 54 along the inner wall of the discharge pipe 10b Good. The capacitive water level sensor 54 can sense the total water level h (t) between the _{height 0 and the height H th and transmit it to the computer 70.} However, the capacitance type level sensor 54, since sometimes cause errors by the surrounding environmental conditions, at least the height 0 and a predetermined height H _th reliably sense can the local water level measurements type 52 (52u, It is preferable to use it in combination with 52d).

It is convenient to install a rainwater tank installation sensor inside the rainwater tank 100 so that the computer 70 can transmit and receive to and from the rainwater tank installation sensor. The water storage capacity of the rainwater tank 100 is input to the computer 70, and the data Ω (t) such as the water storage amount, the water storage speed, the drainage amount, and the drainage speed inside the rainwater tank 100 detected by the rainwater tank installation sensor is input to the computer 70. It is preferable that the computer 70 appropriately transmits the data and receives the data so that the computer 70 can store and utilize the data.

FIG. 3 is a schematic view of Example 2 of the initial rainwater removing device 1 according to the present invention. The initial rainwater removing device 1 of the second embodiment according to the present invention has a gutter 1012 and a water pipe from an eaves gutter 1010 attached below the roof 1002 of the building 1000 in order to drain rainwater to the building 1000. It is connected via 1014 and is connected to the rainwater tank 100 via a water injection pipe 1016 to relay the gutter 1012 and the rainwater tank 100.

As shown in FIG. 3, the main body 10 of the initial rainwater removing device 1 of the present invention has a water injection port 24 arranged on the upper bottom portion 12, and water can be injected into the rainwater tank 100 by a water injection pipe 1016 arranged above the main body 10. it can.

In the second embodiment, as shown in FIG. 3, both the water collection port 22 and the drainage port 26 are arranged at the bottom 16, and the water collection port 22 is connected to the eaves gutter 1010 via the water supply pipe 1014 to collect rainwater. Water is drained, and the drain port 26 is connected to the drain pipe 1018 to drain water. Therefore, in the initial rainwater removing device 1 of the second embodiment, the position of the water injection port 24 is set to a predetermined height _Hth, and the rainwater collected from the water collecting port 22 having a height of 0 is near the _{height Hth (Hth).} Water is stored up to (below) and drained from the drainage port 26 at height 0 for initial rainwater removal. After repeating this initial rainwater removing a predetermined number N (N is 0 or a natural number) times, the drain outlet 26 closed, the exceeded H _th rainwater, to water injection from the water inlet 24 into the rainwater tank 100 Can be done.

That is, the initial rainwater removing device 1 of the second embodiment is a water level sensor 50 and a water level sensor 50 provided with a communication device capable of measuring the water level h (t) from the drain port 26, as in the above-described embodiment and the like. A computer 70 capable of transmitting and receiving the image, a drainage means 60 capable of opening and closing the drain port 26 by a signal received from the computer 70, and the like are provided, and initial rainwater removal and water injection can be performed as in the above-described first embodiment and the first embodiment. it can.

The water collection port 22 and the drainage port 26 may be the same collection / drainage port and may be connected to the water supply pipe 1014 and the drainage pipe 1018 to collect and drain water. Further, the water supply pipe 1014 and the drainage pipe 1018 may also be the same water distribution pipe, and may be connected to the above-mentioned collection / drainage port to switch the collection / drainage. Further, the water supply pipe 1014 and the drainage pipe 1018 and the like may be buried underground.

II. [Rainwater tank device equipped with initial rainwater removal device]

As shown in FIG. 13, the rainwater tank device 2 provided with the initial rainwater removing device 1 according to the present invention has two rainwater tanks, a first rainwater tank 100A and a second rainwater tank 100B. That is, the first rainwater tank 100A that receives rainwater injected beyond the position of the water injection port 24 from the water injection port 24 of the initial rainwater removal device 1 and the first rainwater tank 100A are connected to each other by a water pipe 1017 so that water can flow. It has a second rainwater tank 100B.

In the rainwater tank device 2 provided with the initial rainwater removing device 1 of the present invention, when the water storage amount of the first rainwater tank 100A reaches a certain height, for example, the flow of water is switched by a ball tap, and the constant water flow is switched. Water exceeding the height can be injected into the second rainwater tank 100B via the water pipe 1017. Therefore, the second rainwater tank 100B can store rainwater having a high water quality level that is not affected by the initial rainwater.

In the rainwater tank device 2 according to the present invention, the rainwater immediately after the initial rainwater removal by the initial rainwater removing device 1 and which is presumed to have a small amount of pollution still remains is stored in the first rainwater tank 100A, and the water quality level is too high. Can be used, for example, for cleaning toilets. Further, the rainwater having a high water quality level that is not affected by the initial rainwater and is stored in the second rainwater tank 100B can be used for washing, for example.

As described above, in the rainwater tank device 2 according to the third embodiment, rainwater having different water quality levels can be separately stored in the first rainwater tank 100A and the second rainwater tank 100B, so that the water quality can be determined according to the required water quality. The stored water in the first rainwater tank 100A and the second rainwater tank 100B can be used properly, and the stored rainwater can be used more effectively.

Alternatively, as shown in FIG. 4, the rainwater tank device 2 provided with the initial rainwater removing device 1 according to the present invention is composed of the initial rainwater removing device 1 and one rainwater tank 100, and includes the rainwater tank 100 and the computer 70. It may be linked. That is, the rainwater tank 100 transmits and receives data Ω (t) including any one or more of the water storage amount, the water storage speed, the drainage amount, and the drainage speed inside the rainwater tank 100 at time t to and from the sensor 102 capable of detecting the data Ω (t) by wire or wirelessly. A possible transmission / reception device 104 and an automatic opening / closing valve 108 including a control device 106 for analyzing information obtained from the transmission / reception device 104 are provided.

The rainwater tank device 2 according to the present invention transmits the data Ω (t) detected by the sensor 102 from the transmission / reception device 104 to the computer 70 of the initial rainwater removal device 1. Then, as a reply, the control device 106 analyzes the information received by the transmission / reception device 104 from the computer 70, and the rainwater tank device 2 of the present invention can open and close the automatic opening / closing valve 108.

Therefore, in the rainwater tank device 2 provided with the initial rainwater removing device 1 according to the present invention, the main body 10 of the initial rainwater removing device and the rainwater tank 100 can cooperate with each other via the computer 70. For example, when the amount of water stored in the rainwater tank 100 is insufficient during the dry season, adjustments such as setting the number of times N of initial rainwater removal in the initial rainwater removing device 1 to 0 are made to reduce the amount of water stored in the rainwater tank 100. It can be controlled effectively.

In the rainwater tank device 2 of FIG. 13 having the above two rainwater tanks, the second rainwater tank 100B (and / or the first rainwater tank 100A) has a sensing sensor 102 (not shown), a transmission / reception device 104, and the like. The control device 106 and the automatic opening / closing valve 108 may be attached so that the initial rainwater removing device 1 and the computer 70 can cooperate with each other.

III. [Communication network of rainwater tank device equipped with initial rainwater removal device]

A plurality of rainwater tank devices 2 provided with the initial rainwater removing device 1 according to the present invention as described above are installed in various places in a wide area town such as general households, business establishments and public works projects, and each initial rainwater removing device 1 is installed. It is very meaningful to construct a communication network of the computer 70 provided in the above.

In the communication network 3 (see FIG. 5) of the rainwater tank device 2 provided with the initial rainwater removing device 1 according to the present invention, the computers 70 of the initial rainwater removing devices 1 of the plurality of rainwater tank devices 2 are provided with each other. Is preferably connected to a public network or a communication network between nodes. Then, a computer device 200 capable of acquiring weather data, river data, etc., and calculating local weather information and river information in the area where the plurality of rainwater tank devices 2 exist based on the data can be used on the public line. The communication network 3 according to the present invention can be constructed by connecting to a network or a communication network between nodes.

Through such a communication network 3, the computer device 200 and the rainwater tank device 2 installed at each of the above locations can communicate with each other. Therefore, the computer device 200 calculates and predicts the local weather information and river information of the area where the rainwater tank device 2 is installed from the collected meteorological data, river data, etc., and collects the rainwater tank device 2 from each rainwater tank device 2. By analyzing the data Ω (t) such as the amount of water stored, it is possible to give an instruction regarding drainage and water storage to each rainwater tank device 2 in the area (see Patent Document 6).

FIG. 5 shows a schematic view of the communication network 3 according to the present invention. In FIG. 5, A and B represent the computer device 200, and "tank" represents the rainwater tank device 2 installed in various places. The rainwater tank device 2 is directly connected to the computer device 200 of A by a wired or wireless line or the like in a star shape, and the rainwater tank devices 2 are not connected to each other. On the other hand, the computer device 200 of B includes a rainwater tank device 2 that is directly connected, and the rainwater tank devices 2 are also connected to each other by an inter-node communication network or the like to form a wide-ranging communication network 3.

In the third embodiment, the inter-node communication network can use, for example, P2P (peer to peer) communication, a mesh network, a sensor network, and the like, but is not limited thereto. The inter-node communication network is a communication network in which n nodes (n is an arbitrary integer of 2 or more) capable of communicating with the computer device 200 perform ad hoc communication between neighboring nodes. The inter-node communication network requires that at least one of the n nodes is communicating with the computer device 200. In the communication network 3 of the present invention, the computer 70 of each rainwater tank device 2 plays the role of a node, but a PC or wireless device placed at a relay station or a home, or a movable portable device such as a tablet or a smart phone. , A mobile terminal or the like may be a node.

If the rainwater tank device 2 connected to the computer device 200 of A and the rainwater tank device 2 connected to the computer device 200 of B are connected by at least one node-to-node communication network or the like, a wider communication network can be used. 3 can be constructed, and the computer devices 200 of A and B can function as local stations in each region.

IV. [Initial rainwater removal method]

The initial rainwater removing device 1 according to the present invention, the rainwater tank device 2 provided with the initial rainwater removing device 2, and the communication network 3 thereof have been described above. The rainwater removal method will be described.

For the initial rainwater removal method according to the present invention, refer to FIG.
(1) Steps to prepare the initial rainwater removal device 1 and
(2) A storage step in which the time-measurable computer 70 stores a predetermined number of cycles N (N is an integer of 1 or more) in advance.
(3) When the water level sensor 50 _{senses the water level h (t) = H th} (predetermined height), the saturated water level signal S _th is transmitted to the computer 70, and the computer 70 receiving the saturated water level signal S th is the opening signal S. _A drainage step in which the OP is transmitted to the drainage means 60, and the drainage means 60 opens the drainage port 26 to drain water.
(4) _{A water storage start step in which the computer 70 transmits the closing signal SCL} to the drainage means 60, and the drainage means 60 closes the drainage port 26 to start storage.
(5) An initial rainwater removal cycle repetition step in which the initial rainwater removal cycle consisting of the continuous drainage step (3) and the water storage start step (4) is repeated a predetermined N times.
(6) After draining the contaminated rainwater N cycles times which stores the above body 10, a and water to the main body 10 exceeds the predetermined height H _th rainwater, the rainwater tank 100 from the water injection port 24 Water injection, water injection start step,
including.

According to the initial rainwater removing method according to the present invention, as described above, the initial rainwater or contaminated rainwater stored in the main body 10 of the initial rainwater removing device 1 is drained for N cycles, and then from the water injection port 24 to the rainwater tank 100. Since water can be injected, only very clean rainwater can be stored in the rainwater tank 100.

The initial rainwater removal method according to the present invention, which comprises performing such N initial rainwater removal cycle repeating steps, can be variously usefully modified. For example, after executing the drainage step (3), the water storage start step (4) may be executed after a predetermined time has elapsed.

Alternatively, in the water storage start step (4), the water level sensor 50 is set as the local water level measurement type water level sensor 52 (52u, 52d).
(4) When the'water level sensor 52 (52d) senses the water level h (t) = 0 (height of the drain port 26), a zero water level signal S ₀ is transmitted to the computer 70, and the computer 70 that receives this transmits the above. by sending a closing signal S _CL drainage unit 60, a water storage starting step of draining means 60 starts storing and closes the discharge port 26,
It can be transformed or embodied as follows.

Hereinafter, some specific examples and modifications thereof will be introduced as examples.

By the method as shown in Example 4 below, the initial rainwater removing device 1 of the present invention can be used to automatically and effectively remove the initial rainwater (contaminated rainwater).

The initial rainwater removal method according to Example 4 is
(11) Steps for preparing the initial rainwater removal device 1 and
(12) A storage step in which the time-measurable computer 70 stores a predetermined number of cycles N and a predetermined time interval ΔT _{1 in advance.}
(13) When the opening signal _TOP is received from the computer 70, the drainage means 60 opens the drainage port 26 to drain the water, and the drainage step.
(14) When the water level sensor 50 detects the water level h (t) = 0 (the height of the drain port), the zero water level signal S ₀ is transmitted to the computer 70, and the computer 70 that receives this sends the closing signal S _CL to the computer 70. A water storage start step of transmitting to the means 60, in which the drainage means 60 closes the drain port 26 and starts water storage,
(15) When the water level sensor 50 detects the water level h (t) = H ₀ (≧ 0), the computer 70 that receives the detection signal from the water level sensor 50 sets the _{reception time t to the measurement start time t s.} Time setting step and
It is an initial rainwater removal method including. In the measurement time setting step (15), the water level h (t) = H ₀ preferably has a minute height and may be 0.

In the water storage start step (14), when "the water level sensor 50 senses the water level h (t) = 0 (height of the drain port)", the water level sensor 50 directly measures the water level h (t) = 0. It is not limited to the case of doing. For example, when a local water level measurement type water level sensor 52 is used as the water level sensor 50 and is composed of a lower mounting water level sensor 52d and an upper mounting water level sensor 52u, if the lower mounting water level sensor 52d is turned from on to off, this series of on -The computer 70 that has received the off signal may determine the _{signal as "zero water level signal S 0".} For example, such a case is also included in the case where "when the water level sensor 50 detects the water level h (t) = 0 (height of the drain port), the zero water level signal S ₀ is transmitted to the computer 70".

Then, when the water level sensor 50 detects the water level h (t) = H _th (predetermined height ≧ H ₀ ),
(16)
(16-1) if _t <t _s + ΔT _1, the computer 70, is incremented by one cycle number k,
(16-2) If t> t _s + ΔT ₁ , the computer 70 resets the number of cycles k to 0.
Cycle count step and
(17)
(17-1)
If the number of cycles k <N, the computer 70 _{transmits the opening signal TOP} to the drainage means 60, and from the drainage step (13), the water storage start step (14), and the measurement time setting step (15). Initial rainwater drainage step,
Or
(17-2)
If the number of cycles k ≧ N, the rainwater exceeding the predetermined height H _th, water injection initiating water injection from injection port 24 into the rainwater tank 100,
The determination step of executing either (17-1) or (17-2) of
including.

In such an initial rainwater removal method according to the fourth embodiment, the water level sensor 50 senses the water level h (t) = H _th (predetermined height) within ΔT _{1 from the measurement start time t s immediately after drainage.} Only if the initial rainwater removal cycle is repeated. When the initial rainwater removal cycle is repeated N times in succession for a predetermined number of cycles, a water injection step of starting water injection from the water injection port 24 to the rainwater tank 100 is executed.

Alternatively, in the initial rainwater removal method according to the fourth embodiment,
(12) The storage step is
(12-1) The time-measurable computer 70 includes a step of storing _{ΔT 2} (ΔT ₁ <ΔT _{2) in advance.}
(18) When t = t _s + ΔT ₂ elapses, the computer 70 _{sends an opening signal TOP} to the drainage means to perform the drainage step (13), the water storage start step (14), and the measurement time setting step (15). At the same time, the computer 70 resets the number of cycles k to 0, the reset drainage step,
May be further included. When it rains, regardless of time of non-rain, when the time constant from the measurement start time t _s [Delta] T ₂ has elapsed, it is intended to force the wastewater.

Alternatively, in the reset drainage step (18), the computer 70 may leave the cycle count k as it is after executing the drainage step (13), the water storage start step (14), and the measurement time setting step (15). You do not have to reset it to.

In such an initial rainwater removing method, the initial rainwater removing device 1
(A) When it is raining
(A-1) Initial rainwater drainage step (17-1),
(A-2) Water injection step (17-2)
Even during any of the determination steps (17), or
(B) When it is not raining
(B-1) When the drainage for each _{ΔT 1 is repeated while the number of cycles k = 0}
(B-2) With the number of cycles k = N or k> N, that is, with the water level h (t) = H _th (predetermined height), no water injection is substantially performed.
To force a wastewater In any case, such as, at the same time by the measurement time setting step (15), resets the measurement start time t _s. Then, if the water injection step (17) (initial rainwater drainage step (17-1) or water injection step (17-2)) is continuously executed with k unchanged and the number of cycles k is reset to 0, the water injection step (17-1) 17) is redone from k = 0.

Therefore, as shown below, _{within t = t s} + ΔT ₁ , the computer 70 receives the saturated water level signal S _th that senses the water level h (t) = H _{th (predetermined height) from the water level sensor 50.} Depending on whether or not it is, the computer 70 can determine whether it is currently in a rainy state or a non-precipitation state.

That is,
(18)'The reset drainage step is
(18-1)
(18-1-1) The computer 70 does not receive the saturated water level signal S _th that senses the water level h (t) = H _{th (predetermined height) from the water level sensor 50 within t = t s} + ΔT _1. In the non-precipitation state, the number of non-precipitation periods m is set to m = m + 1.
(18-1-2) The computer 70 received the saturated water level signal S _th that sensed the water level h (t) = H _{th (predetermined height) from the water level sensor 50 within t = t s} + ΔT _1. In the case of rainfall, the non-precipitation period m is set to m = 0.
By including the non-precipitation period count step, it is possible to count the number of non-precipitation periods m in which _{ΔT 2 is the unit non-precipitation period.}

And
(12) The above memory step
(12-2) A step in which the time-measurable computer 70 stores the cycle number N as the cycle number N (m · ΔT _{2 ) which is a function of the product of the non-precipitation period number m and the time interval ΔT 2.} ,
By including, if the non-precipitation period is m · ΔT ₂ , the initial rainwater can be removed for the number of cycles N (m · ΔT _{2) cycles stored in advance.}

That is, according to such an initial rainwater removal method, the non-precipitation period is defined as the product m · ΔT _{2 of the non-precipitation period several m and the time interval ΔT 2} , and the predetermined number of cycles N is the function N _{of m · ΔT 2.} If the computer 70 is input as (m · ΔT ₂ ), the number of initial rainwater removal cycles can be automatically selected according to the length of the non-precipitation period. For example, the function N (m · ΔT ₂ ) may be N (m · ΔT ₂ ) = ΔT ₂ + m · ΔT ₂ = (1 + m) ΔT ₂ .

V. [Simulation and comparison with conventional equipment]

In Example 5, the initial rainwater removal device 1 according to the present invention, which was actually completed, was used as a model, and the initial rainwater removal method according to the present invention was applied to the model to simulate the initial rainwater removal. On the other hand, a test device (hereinafter referred to as "evaluation device") for evaluating a conventional initial rainwater removal device was manufactured, and the initial rainwater removal performance of a commercially available initial rainwater removal device was evaluated. Hereinafter, (A) a simulation using the initial rainwater removing device 1 according to the present invention, (B) an experiment in which a commercially available initial rainwater removing device is evaluated by the above evaluation device, and (C) these are compared and examined. To do.

(A) Simulation using the initial rainwater removing device 1 according to the present invention (A-1) Contents of the device In the simulation according to the fifth embodiment, the initial rainwater removing device 1 shown in FIG. 3 described in the second embodiment is used. Used for the model. The initial rainwater removing device 1 is connected to the gutter 1012 via the water supply pipe 1014, and is connected to the rainwater tank 100 via the water injection pipe 1016.

In the initial rainwater removal device 1 according to the fifth embodiment, the water collection port 22 and the drainage port 26 are the same (collection / drainage ports (22, 26)), and the water is collected and drained by one collection / drainage pipe connected to the water collection port 22. There is. Further, the water supply pipe 1014 and the drainage pipe 1018 are also the same water supply / drainage pipe (1014, 1018), and the direction in which rainwater flows is switched by opening and closing an electromagnetic valve attached to the tip of the water supply / drainage pipe (see FIG. 3). These water supply and drainage pipes, collection and drainage pipes, etc. are buried underground.

The initial rainwater removing device 1 according to the fifth embodiment uses a local water level measurement type water level sensor 52 as the water level sensor 50, and a water level sensor 52d (lower mounting water level sensor) is located in the immediate vicinity of the collection / drainage ports (22, 26). , A water level sensor 52u (upper mounting water level sensor) can be attached to the immediate side of the water injection port 24 to detect the water level at each position. The water level sensor 52d is turned on when h (t) is slightly higher than h (t) = 0 (water level h (t) = H ₀ ), where h (t) is the water level from the collection / drainage ports (22, 26). The water level sensor 52u is turned on when h (t) = H _th (height of the water injection port 24), and transmits a switch-on detection signal to the computer 70, respectively. Computer 70 signals the drainage means 60 by reception of the signal (open signal _{S OP,} closed signal _{S CL)} sends, collecting water outlet (22, 26), from the water inlet 24, drained of the initial rainwater, respectively, the water injection It can be carried out.

(A-2) Experimental method In this experiment, the amount of water stored in the main body 10 of the initial rainwater removing device 1 according to the second embodiment, the on / off state of the water level sensors 52u and 52d corresponding to this, and the valve (collection and drainage). The opening / closing operation (OPEN, CLOSE) of the mouth (22, 26)) and the measurement start time t _s (Sec1, Sec2, Sec3) in each cycle were examined for the time t. Precipitation data from the Fukui Observatory of the Regional Meteorological Observation System (AMeDAS) from 2000 to 2009 was used for the rainfall at time t (hereinafter, [unit time] in this simulation). Table 3 shows a part of the data in the above simulation that represents the characteristics of the present invention.

The method according to Example 4 was used as the initial rainwater removal method, and the flow thereof is shown in FIG. In the fifth embodiment, the predetermined time intervals ΔT ₁ = 10 and ΔT ₂ = 36 [unit time] are set, and the initial rainwater removal by the forced drainage step (17-1) is repeated a predetermined number of times N = 3 times. overwhelmed collecting water outlet (the drain outlet 26), the rainwater exceeding the H _th, it was decided to water injection from the water inlet 24 into the rainwater tank 100.

(A-3) Results and discussion of this simulation In Table 3, at t = 2111, _{the reset drainage step (18) for each ΔT 2} was performed, and after 0 rainfall continued for a while (20 unit hours; omitted in Table 3). , The water level sensor 52d was turned on at t = 2131, and the water _{level sensor 52u was turned on within ΔT 1 from t s} = 2131 (Sec1), 2142 (Sec2), and 2145 (Sec3), so a total of N = 3 times. The initial rainwater drainage step (17-1) was continuously performed.

After the third initial rainwater drainage step (17-1), the water level sensor 52d is turned on at t = 2147, and then the water level sensor 52u is turned on at t = 2150 within _{ΔT 1 and the water injection step (17-2).} Was executed. from t = 2147 to the [Delta] T ₂ elapsed t = 2183, reset the drainage step for each [Delta] T ₂ (18) is executed.

(B) Evaluation device for conventional initial rainwater removal device (B-1) Contents of the device In developing the evaluation device for the conventional initial rainwater removal device, we created a device that can reproduce the state of the actual rain from the beginning of the rain. did. A photograph of the evaluation device is shown in FIG.

The simulated rainwater is sent from the water storage tray at the bottom of the evaluation device to the simulated rainwater supply pipe at the top of the evaluation device by a shallow well pump. After that, it is guided to the initial rainwater removal device (conventional type) via the eaves gutter-call gutter-gutter, and is divided into two directions, the rainwater tank direction and the drainage gutter direction. The pseudo rainwater that flows in the direction of the gutter returns to the bottom water storage tray, and the amount that flows in the direction of the other rainwater tank is stored in the measuring container. The simulated rainwater flow rate according to the assumed rainfall intensity is controlled by adjusting the opening and closing of the three-way valve installed in the shallow well pump.

(B-2) Experimental method (B-2-1) Evaluation conditions and evaluation targets

The pseudo-rainwater flow rate per unit time is determined by the product of the assumed rainfall intensity and the roof area (Table 1). In this experiment, the average building area of detached houses all over Japan is 86m ^{2, and the roof area borne by one gutter is 20m 2} which is about 1/4 of that, assuming that there are gutters at the four corners of the house. The flow rate was set as. The assumed rainfall intensity was 1 to 50 mm / h shown in Table 1.

Schematic diagrams of the structure of the initial rainwater removal device evaluated this time are shown in FIGS. 11A, 11B, and 11C. The structure of each initial rainwater removal device is as follows: (1) Product A has a drainage hole method (Fig. 11 (a)), (2) Product B has a flow velocity utilization method (Fig. 11 (b)), and (3) Product C. Is classified into a storage method (FIG. 11 (c)).

(B-2-2) Performance evaluation test In the performance evaluation test of the conventional initial rainwater removal device (FIGS. 11 (a), (b), (c)), each initial rainwater removal device is attached to the evaluation device, and the above This was performed according to the evaluation conditions of (B-2-1). The test was carried out by operating the three-way valve installed in the shallow well pump, setting the flow rate to an arbitrary flow rate, confirming that there was no change in the flow rate, and then collecting and weighing the simulated rainwater that had been diverted to the rainwater tank side for 5 minutes. ..

(B-3) Performance Evaluation Test Results and Discussion of Conventional Initial Rainwater Removal Device Fig. 12 shows the relationship between the assumed rainfall intensity, water intake rate, and water intake amount during the product A and product B experiments. Product A has a water intake rate of almost 0% at 1 mm / h, which is considered to be the precipitation intensity at the time of general initial rainwater, and is considered to have a relatively high initial rainwater removal performance. At higher rainfall intensity, the water intake rate is 60% or more for rain of 3 to 10 mm / h, which is the general intensity of rain, and it can be seen that it has a relatively well-balanced water intake performance. To. If the rainfall intensity is higher than that, the rainwater in the intake cup overflows toward the center, and the water intake rate drops sharply. Be done. Product B shows a water intake efficiency of about 50% from a rainfall intensity of 1 mm / h, and initial rainwater removal cannot be expected so much. However, the water intake efficiency is high up to the range where the rainfall intensity is high, and it is suitable for the case of aiming for more rainwater storage.

Table 2 shows the relationship between the assumed rainfall intensity and the water intake start time during the Product C experiment. For product C, since the water intake rate is almost 100% after the initial rainwater pool is filled with the initial rainwater due to its structure, the time from the start of the pseudo rainwater inflow to the start of water intake was measured. In the case of this device, pseudo rainwater flowed out from the orifice at the bottom at 0.3 to 1.0 L / min depending on the water level in the initial rainwater pool until the start of water intake. As a result, the small capacity of the initial rainwater pool can be covered, and the initial rainwater can be removed more reliably. From the above, it is positioned as a device that works close to the ideal operation of removing a certain amount of initial rainwater from the beginning of rain and taking all the water after the start of water intake. However, water intake does not start when it continues to rain with low rainfall intensity, and water cannot be taken when it rains in such a way. Further, due to the complexity of the device structure, there is a possibility that troubles such as complexity in performing maintenance and clogging of the orifice may occur.

(C) Comparison between the device according to the present invention and the conventional device As described above, the product A has a relatively high initial rainwater removal performance at the precipitation intensity (1 mm / h) at the time of general initial rainwater, and the initial stage. Subsequent general rainfall intensities (3 to 10 mm / h) also showed a water intake rate of 60% or more, but at higher rainfall intensities, the water intake rate dropped sharply. In addition, product B cannot be expected to remove initial rainwater very much. For product C, while removing a certain amount of initial rainwater from the beginning of rainfall, it is possible to take in all of the water after the start of water intake, but if it continues to rain with low rainfall intensity, water intake will not start, and such rainwater will fall. In case of rain, water cannot be injected into the rainwater tank.

For these prior art devices, by applying the initial rainwater removal method of the present invention in the initial rainwater removal device according to the present invention, the predetermined time adjustment interval [Delta] T _1, certainly in the initial rainwater regardless intensity of rainfall It can be removed, and a water intake rate of approximately 100% can be expected after the initial rainwater removal. In addition, the rainfall status can be confirmed by the reset drainage step at regular time intervals (ΔT ₂ [unit time]), and the state where rainwater is accumulated in the device for _{a long time (ΔT 2 [unit time] or more) can be confirmed.} It is possible to avoid and always inject rainwater of a certain quality or higher into the rainwater tank.

In the sixth embodiment, the rainwater tank device 2 provided with the latest initial rainwater removing device 1 according to the present invention actually implemented will be introduced. The rainwater tank device 2 of the sixth embodiment, whose overall schematic diagram is shown in FIG. 14, was installed in a newly built detached house completed in October 2015 in Fukui City, Fukui Prefecture. Piping work is being carried out from the rainwater tank to the toilet, washing machine, and outdoor faucet, and rainwater can be used as domestic water.

The components of the rainwater tank device 2 are two rainwater tanks (100A and 100B), a computer 70, an initial rainwater removing device 1, and water consumption measuring devices. The two rainwater tanks 100A and 100B have a ^{volume of 2 m 3} and have a total volume of 4 m ^3. The rainwater tanks 100A and 100B are classified for toilet use, washing and outdoor faucets, respectively, and rainwater containing pollutants, which could not be completely removed by the initial rainwater removal device 1, is transferred from the rainwater tank 100A to the toilet tank. After the initial rainwater rainfall, clean rainwater flows into the other washing and outdoor faucet tank from the rainwater tank 100B (see FIG. 13).

Rainwater taken from the gutters 1012 (two places) on the roof 1002 is carried by the pipe 1014 under the ground, rises in the initial rainwater removing device 1, and flows into the rainwater tank 100A from above. Float type water level sensors 52u and 52d are attached to the upper and lower two places of the PVC pipe having an inner diameter of 146 mm of the initial rainwater removing device 1. An electromagnetic valve for drainage (KITZ Co., Ltd., EA100-TE) is installed in the lower part of the initial rainwater removing device 1, and the valve is opened and closed by computer control by a computer 70. Toilets, laundry and outdoor faucets are supplied by electric pumps for shallow wells (Kawamoto Seisakusho Co., Ltd., NF2-150S). In addition, the amount of water used can be measured by a remote water meter (Aichi Tokei Denki Co., Ltd., MG700M) installed in the pipe.

FIG. 15 shows a schematic diagram of computer control of the initial rainwater removing device 1 and measurement of the amount of water used. A remote water meter and a data logger for recording (Graphtec Corporation, GL240) are shown in FIG. The water meter has a specification in which the internal reed switch is switched ON (short circuit) / OFF (insulation) every 10 L flow rate. The data logger records the date and time when the reed switch of each meter is switched.

A circuit diagram of the computer 70 is shown in FIG. The circuit is an application of a type of embedded system using a microcomputer (hereinafter referred to as a microcomputer) called Arduino. It operates at DC 5V, and in addition to the relay switch for controlling the solenoid valve, there is an LED for checking each item (relay operation, opening / closing status of the solenoid valve, 4 items of each water meter). In addition, the LCD monitor module displays the open / closed status of the solenoid valve, the current mode, the elapsed time, and the number of times the relay switch is switched. The opening and closing of the solenoid valve is controlled by switching a 1-pole double-throw relay switch according to a signal from the microcomputer.

The rainwater tank device 2 provided with the initial rainwater removing device 1 according to the sixth embodiment can be used effectively for rainwater, and a remote water amount meter and a data logger for recording can be used in more detail. By collecting data and analyzing the data, it is possible to contribute to the improvement of the rainwater tank device 2 according to the present invention.

Although the initial rainwater removing device of the present invention, the rainwater tank device provided with the initial rainwater removing device, the communication network of the rainwater tank device, and the initial rainwater removing method have been described above, the present invention is not limited to the above-described embodiments and examples. .. Further, although the present invention has focused on the removal of contaminated initial rainwater, it is also possible to deal with the removal of widely contaminated contaminated rainwater including the removal of initial rainwater, and the present invention is not necessarily limited to the removal of initial rainwater.

In addition, the present invention can be carried out in a mode in which various improvements, modifications and changes are made based on the knowledge of those skilled in the art without departing from the gist thereof.

The initial rainwater removal device according to the present invention is used for improving the quality of rainwater stored in a rainwater tank, improving the efficiency of rainwater intake, and effectively suppressing flood damage in a city caused by a local guerrilla rainstorm that has occurred particularly remarkably in recent years. Can be done.

1: Initial rainwater removal device 2: Rainwater tank device 3: Rainwater tank device Communication network 10: Main body 10a: Introduction pipe (container A)
10b: Discharge pipe (container B)
10c: Water flow pipe 10d: Reserve water storage pipes 12, 12a, 12b: Upper bottom 14, 14a, 14b: Sides 16, 16a, 16b: Bottom 22: Water collection port 24: Water injection port 26: Drain port 50: Water level sensor 52: Local water level measurement type water level sensor 52u: Upper mounting (water level h (t) = H _th ) Water level sensor 52d: Lower mounting (water level h (t) = 0) Water level sensor 54: Capacitive water level sensor 60: Drainage means 62: Pulling mechanism 64: Connecting mechanism 66: Lid 70: Computer 100: Rainwater tank 100A: First rainwater tank 100B: Second rainwater tank 102: Sensor 104: Transmission / reception device 106: Control device 108: Automatic opening / closing valve 200: Computer Equipment (including broadcasting stations, meteorological stations, etc.)
1000: Building 1002: Roof 1010: Eaves gutter 1012: Vertical gutter 1014: Water supply pipe 1016: Water injection pipe 1017: Water pipe 1018: Drain pipe h (t): Water level at time t _OP : Opening signal S _CL : Closing signal S _th : Saturated water level signal S ₀ : Zero water level signal

Claims (17)

A gutter installed under the roof of the building and a rainwater tank are relayed to drain the rainwater to the building.
A water collection port that is connected to the gutter and collects rainwater from the gutter,
A drainage port that can drain rainwater collected from the water collection port and
A water inlet that can be connected to the rainwater tank to allow water to pass through,
The main body equipped with the above can store the collected rainwater up to the position of the water injection port.
A storage type initial rainwater removal device capable of injecting rainwater beyond the position of the water injection port into the rainwater tank from the water injection port.
A water level sensor equipped with a communication device capable of measuring the water level h (t) from the drain port, and
A computer that can send and receive to the water level sensor,
A drainage means capable of opening and closing the drainage port according to a signal received from the computer is provided.
The water level sensor senses the water level h (t) of rainwater stored in the main body and transmits the water level h (t) to the computer.
The computer, in response to the water level h (t) thus received, to the drainage means, and transmits an opening signal S _OP or closing signal S _CL,
Is the drainage means which receives the opening signal S _OP or the closed opening signal S _CL, by opening and closing the drain port in response to the signal S _OP or S _CL thus received, the initial rainwater removal device for performing water-drainage rainwater .. The main body
A container having a bottom, an upper bottom, and a side connecting the two.
Wherein the position of the bottom portion the drainage port disposed near the height 0, the height of the water inlet is a predetermined height H _th, a initial rainwater removal apparatus according to claim 1,
The water collecting port is connected to the gutter,
A water injection port arranged at a predetermined height _Hth from the drainage port is connected to the rainwater tank, and the water injection port is connected to the rainwater tank.
After the drainage means which receives the closing signal S _CL from the computer has closed the drain outlet, the rainwater exceeds the predetermined height H _th and stored in the body, to the rainwater tank from said water inlet An initial rainwater remover that can inject water. The main body has the drainage port (height 0).
Container A (hereinafter, also referred to as “introduction pipe”) and container B (hereinafter, also referred to as “discharge pipe”) arranged in parallel with the container A are connected by a water pipe below each pipe. It is a U-shaped pipe that allows water to pass through,
The introduction pipe (container A) is
It has an upper bottom portion a, a side portion a, and a bottom portion a, a water collecting port 22 is provided in the vicinity of the upper bottom portion a, and this is connected to the gutter and arranged in the vertical direction, and rainwater is discharged from the gutter. Collect water and
The discharge pipe (container B) is
It has an upper bottom portion b, a side portion b, and a bottom portion b, and the water level sensor is installed on the inner wall of the side portion b to measure the water level h (t) from the drain port (height 0).
The predetermined height H _th of the main body, provided with said water inlet for water injection into the rainwater tank, near (the side a of the bottom of the body (including the bottom a, a bottom b), the side b The drainage port (height 0) is provided in (including).
The initial rainwater removing device according to claim 2. A spare water storage pipe was provided in the vertical direction from the water pipe of the U-shaped pipe.
The initial rainwater removing device according to claim 3. The drainage means
The pulling mechanism provided on the upper bottom of the main body and the lid for opening and closing the drainage port are connected by a connecting mechanism.
From said computer, said opening signal S _OP or closing signal S _CL the cited up mechanism which receives the can, which can open and close the lid part via the coupling mechanism,
The initial rainwater removing device according to any one of claims 1 to 3. The drainage means has a communication function and has a communication function.
From said computer, said opening signal S _OP or closing signal S _CL capable of opening and closing the drain port receives an electrical controllable switch (hereinafter also referred to as "valve".)
The initial rainwater removing device according to any one of claims 1 to 3. The water level sensor has a communication function and has a communication function.
The height 0 near the water outlet between the height H _th of the water inlet with the water level h (t) of the total water level measurement type that can sink-float, or,
Wherein a water level sensor of the local water level measurements type mounted on at least one point of the height H _th of water inlet,
At least the water level h (t) = H _th (predetermined height) can be sensed and transmitted to the computer.
The initial rainwater removing device according to any one of claims 1 to 3. The water level sensor has a communication function and has a communication function.
Wherein between the height H _th height 0 and the water inlet of the water outlet, a capacitance type water level sensor installed along the inner wall of the body,
It can sense the water level h (t) and send it to the computer,
The initial rainwater removing device according to any one of claims 1 to 3. The rainwater tank according to claim 1
A first rainwater tank to which a first electric pump is attached, which receives rainwater injected beyond the position of the water injection port from the water injection port of the initial rainwater removing device, and
A second rainwater tank to which a second electric pump is attached, which is connected to the first rainwater tank by a water pipe and is capable of passing water,
Have,
When the water stored in the first rainwater tank reaches a certain height, rainwater exceeding the certain height can be injected into the second rainwater tank via the water pipe.
The first electric pump supplies water at the water quality level immediately after the initial rainwater removal by the initial rainwater removal device.
The second electric pump can supply water having a higher water quality level than the first electric pump.
A rainwater tank device equipped with an initial rainwater removal device. The rainwater tank that receives rainwater injected beyond the position of the water injection port from the water injection port of the initial rainwater removing device according to claim 1.
A sensing sensor capable of detecting data Ω (t) including any one or more of the water storage amount, the water storage speed, the drainage amount, and the drainage speed inside the rainwater tank at time t.
A transmitter / receiver that can send and receive by wire or wirelessly,
An automatic opening / closing valve including a control device that analyzes information obtained from the transmission / reception device, and
It is a rainwater tank device equipped with
The data Ω (t) sensed by the sensor can be transmitted from the transmission / reception device to the computer provided with the initial rainwater removal device according to claim 1.
A rainwater tank device including an initial rainwater removing device capable of opening and closing the automatic opening / closing valve by analyzing information received by the transmitting / receiving device from the computer. A network formed by a plurality of rainwater tank devices according to claim 9, which are installed in various places such as general households, business establishments, and public works establishments in a wide area town.
Each of the computers included in the initial rainwater removing device of the plurality of rainwater tank devices,
A computer device that can acquire meteorological data and river data, and can calculate local meteorological information and river information in the area where the plurality of rainwater tank devices exist based on the data.
Is connected to the public network or the inter-node communication network,
A rainwater tank device communication network provided with an initial rainwater removing device capable of communicating between the computer device and a plurality of rainwater tank devices installed at various locations. (1) The step of preparing the initial rainwater removing device according to claim 1 and
(2) A storage step in which the computer capable of measuring time stores a predetermined number of cycles N (N is an integer of 1 or more) in advance.
(3) When the water level sensor detects the water level h (t) = H _th (predetermined height), the saturated water level signal S _th is transmitted to the computer, and the computer receiving _{the saturated water level signal S th sends the opening signal TOP} . A drainage step that transmits to the drainage means, and the drainage means opens the drainage port to drain water.
(4) the computer transmits the closing signal S _CL to said drainage means and reservoir starting step of the drainage means to start the water by closing the water outlet,
(5) An initial rainwater removal cycle repetition step in which the initial rainwater removal cycle consisting of the continuous drainage step and the water storage start step is repeated N times, and
(6) the rainwater exceeds the predetermined height H _th and water in the body, to start water injection from the injection port into the rainwater tank, a water injection step,
Initial rainwater removal methods, including. (1)'In the step of preparing the initial rainwater removing device, the water level sensor of the initial rainwater removing device can detect the water level h (t) = 0 (height of the drainage port).
(4)'The water storage start step is
When the water level sensor senses the water level h (t) = 0 (the height of the water outlet), and sends a zero level signal S ₀ in the computer, the computer is the closing signal S _CL which receives the said drainage means When transmitted, the drainage means closes the drainage port and starts storing water.
The initial rainwater removal method according to claim 12. (11) Steps to prepare the initial rainwater removal device and
(12) A storage step in which a computer capable of measuring time stores a predetermined number of cycles N and a predetermined time interval ΔT _{1 in advance.}
(13) When the opening signal _TOP is received from the computer, the drainage means opens the drainage port to drain the water, and the drainage step.
(14) When the water level sensor detects the water level h (t) = 0 (height of the drain port), the zero water level signal S ₀ is transmitted to the computer, and the computer receiving this sends the closing signal _SCL to the drainage. A water storage start step of transmitting to the means, in which the drainage means closes the drainage port and starts water storage,
(15) When the water level sensor detects the water level h (t) = H ₀ (≧ 0), the computer that receives the detection signal from the water level sensor sets the reception time t at which the detection signal is received as the measurement start time t. _The measurement time setting step to be set in s and
It is an initial rainwater removal method including
When the water level sensor detects the water level h (t) = H _th (predetermined height ≥ H ₀ ),
(16)
(16-1) if _t <t _s + ΔT _1, the computer, by one increases the number of cycles k,
(16-2) If t> t _s + ΔT ₁ , the computer resets the number of cycles k to 0.
Cycle count step and
(17)
(17-1)
If the number of cycles is k <N, the computer _{transmits an opening signal TOP} to the drainage means, and includes a drainage step (13), a water storage start step (14), and a measurement time setting step (15). Initial rainwater drainage step,
Or
(17-2)
When the number of cycles k ≧ N, the water injection step of starting to inject rainwater exceeding the _{predetermined height Hth into the rainwater tank from the water injection port,}
And the determination step to execute any of
Initial rainwater removal methods, including. (12)'The memory step is
(12-1) The time-measurable computer includes a step of storing _{ΔT 2} (ΔT ₁ <ΔT _{2) in advance.}
(18) When t = t _s + ΔT ₂ elapses,
The reset drainage step, wherein the computer _{transmits an opening signal TOP} to the drainage means to perform the drainage step (13), the water storage start step (14), and the measurement time setting step (15).
The initial rainwater removal method according to claim 14 , further comprising. (18) The reset drainage step is
The drainage step of (13), the water storage start step of (14), and the measurement time setting step of (15) are performed, and the number of cycles k is reset to 0.
The initial rainwater removal method according to claim 15. (18)'The reset drainage step is
(18-1)
(18-1-1) The computer does not receive the saturated water level signal S _th that senses the water level h (t) = H _{th (predetermined height) from the water level sensor within t = t s} + ΔT _1. In the non-precipitation state, the number of non-precipitation periods m is set to m = m + 1.
(18-1-2) The computer received the saturated water level signal S _th that sensed the water level h (t) = H _{th (predetermined height) from the water level sensor within t = t s} + ΔT _1. In the case of rainfall, the non-precipitation period m is set to m = 0.
Including non-precipitation period count steps
(12) The storage step is
(12-2) A step in which the time-measurable computer stores the cycle number N as the cycle number N (m · ΔT _{2 ) which is a function of the product of the non-precipitation period number m and the time interval ΔT 2.} ,
The initial rainwater removal method according to claim 15 or 16.

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