JP7424405B2 - water supply device - Google Patents

Description

The present invention relates to a water supply device.

In order to supply sanitary water within a building, water purifiers are attached to faucets in the building or water purifiers are attached to water pipes.

For example, the water purification device disclosed in Patent Document 1 purifies water supplied to each faucet 22 through a main water pipe 16 in the home using a central water purifier 18 when the water is drawn into the home from the water main pipe 12.

If the water that has been drawn into the building and passed through the central water purifier 18 is not used for a long time, it will remain in the home main pipe 16 with chlorine removed, causing bacteria to grow and the water to become unsanitary. It ends up. For this reason, in the water purification device according to Patent Document 1, a drainage mechanism 3 is provided in the pipe line connecting the home main pipe 16 and the faucet 22, and new water is introduced after disposing of unsanitary water. The water in the pipe can always be kept in a sanitary condition.

Japanese Patent Application Publication No. 2006-249785

The water purification device described in Patent Document 1 periodically discards the water that has accumulated in the pipes, so there is a problem that the amount of water consumed increases. The problem becomes especially serious when the water supply is insufficient.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a water supply device that can supply sanitary water without wasting water.

(1) The water supply device according to the present invention includes a tank in which water is stored, a faucet, a first pipe that communicates between the tank and the faucet, and a second pipe that communicates the tank and the faucet. , a pump, a detection unit that detects opening/closing of the faucet, and a control unit, the tank is divided into a first chamber and a second chamber, and the first chamber is filled with water. An inlet for inflow and a supply port communicating with the first pipe are located, a return port communicating with the second pipe is located in the second chamber, and the pump Water is sent from the second chamber to the first chamber through a first filter, and the control section drives the pump based on a detection signal from the detection section indicating that the faucet is closed, and the control section drives the pump based on a detection signal from the detection section indicating that the faucet is closed. The pump is stopped based on a detection signal from the detection section indicating that the pump is present.

According to the above configuration, since the pump is driven by closing the faucet, the water remaining in the second pipe and the second chamber can be purified by the first filter. Thereby, sanitary water can always be supplied from the faucet without discarding the water remaining in the second pipe and the second chamber.

(2) Preferably, the faucet has an opening through which water can flow, and a packing that opens and closes the opening, and the detection section is a pressure sensor that detects the pressure of the packing.

According to the above configuration, since the opening/closing of the faucet can be detected by the pressure sensor that detects the pressure of the packing, there is no need to provide a large-scale mechanism for detecting the opening/closing of the faucet, and the number of parts can be reduced and the operation can be easily performed. A water supply device that can supply sanitary water can be realized.

(3) Preferably, the second pipe further includes a check valve that allows water to flow toward the tank.

According to the above configuration, by preventing water from flowing backward from the second pipe to the first pipe, water in the second pipe and the second chamber before passing through the first filter can be prevented from being discharged from the faucet.

(4) Preferably, the water generating device further includes a water generating device that extracts moisture from the air to obtain water, and the water generating device supplies water to the tank.

According to the above configuration, water can be extracted from the surrounding air and stored in the tank. Therefore, even in the event of a water outage, water can be secured and water can be stored in preparation for disasters. Moreover, by purifying it with the first filter, it can be used as drinking water.

(5) Preferably, the first chamber is divided into a first sub-chamber where the inflow port is located and a second sub-chamber where the supply port is located, and the second sub-chamber is divided into a first sub-chamber where the inlet is located and a second sub-chamber where the supply port is located. Water can flow through the first sub-chamber and the second filter, and the pump sends water from the second chamber to the second sub-chamber.

According to the above configuration, even if water is sent from the tank to the faucet without circulating from the first pipe to the second pipe and the second chamber, the water is purified by the second filter. Sanitary water can be supplied from the faucet.

The water supply device according to the present invention can supply sanitary water without disposing of water.

FIG. 1 is a schematic diagram showing a water supply device 10 according to an embodiment of the present invention together with a building 8. As shown in FIG. FIG. 2 is a diagram showing the water supply device 10 of FIG. 1. FIG. 3 is a block diagram of the water supply device 10. FIG. 4 is a flowchart showing the control performed by the controller 22 of the water supply device 10. FIG. 5 is a schematic diagram showing a water supply device 10A according to modification 1 together with a building 8. FIG. 6 is a diagram showing a water supply device 10A according to modification 1. FIG. 7 is a block diagram of the water supply device 10A of FIG. 6. FIG. 8 is a flowchart showing the control performed by the controller 22 of the water supply device 10A.

Embodiments of the present invention will be described below. The embodiments described below are merely examples of the present invention, and it goes without saying that the embodiments of the present invention can be modified as appropriate without changing the gist of the present invention. In the following description, the vertical direction of the building 8 in the constructed state is referred to as the up-down direction 1, and the direction in which the faucet 18 extends from the wall and is perpendicular to the up-down direction 1 is referred to as the left-right direction 2. Further, a direction perpendicular to the up-down direction 1 and the left-right direction 2 is defined as a front-back direction 3.

As shown in FIG. 1, the water supply device 10 is a device that is installed in a building 8 and supplies water within the building 8. Tap water is drawn into the building 8 from a water main pipe 9 installed underground through a water meter M to the water supply device 10 in this embodiment. Water is supplied from the faucet 18 of the water supply device 10 by the water pressure of the tap water. As shown in FIG. 2, the water supply device 10 includes a tank 15, a first pipe 16, a second pipe 17, a faucet 18, a pressure sensor (an example of a detection part) 19, a pump 20, It includes a stop valve 21 and a controller (an example of a control section) 22.

As shown in FIGS. 1 and 2, the tank 15 stores water drawn from the water main 9 in the building 8. Tank 15 is arranged in outdoor space 12. Tank 15 has a box shape. Inside the tank 15, a partition wall 13 is located that partitions the tank into two spaces. The tank 15 is divided into a first chamber 25 and a second chamber 26 by a partition wall 13. A first filter 32 is located at the center of the partition wall 13 in the left-right direction 2 and the front-back direction 3.

The first chamber 25 is located below the tank 15. The first chamber 25 is in direct communication with the water main 9 and stores water flowing from the water main 9. An inlet 30 through which water flows from the water main pipe 9 and a supply port 31 communicating with the first pipe 16 are located in the first chamber 25 .

The inlet 30 is located below the first chamber 25. The supply port 31 is located on the left side of the first chamber 25.

The position of the supply port 31 in the vertical direction 1 is approximately the same as the position of the inflow port 30 in the vertical direction 1.

The second chamber 26 is located above the tank 15 and adjacent to the first chamber 25. The second chamber 26 communicates with the first chamber 25. The second chamber 26 has the same dimensions as the first chamber 25 in the left-right direction 2 and the front-back direction 3. The second chamber 26 is smaller in size than the first chamber 25 in the vertical direction 1. A return port 33 communicating with the second pipe 17 is located in the second chamber 26 .

The return port 33 is located on the left side of the second chamber 26 and at the bottom in the vertical direction 1. The position of the return port 33 in the left-right direction 2 is the same as that of the supply port 31.

The first filter 32 removes bacteria, chlorine, trihalomethane, residual pesticides, odors, and the like. The first filter 32 is made of, for example, activated carbon, hollow fiber membrane, nonwoven fabric, ceramic, ion exchange resin, or a combination of these. The first filter 32 purifies the water flowing from the second chamber 26 to the first chamber 25.

The first pipe 16 extends from the outdoor space 12 to the indoor room 11. The first pipe 16 communicates the first chamber 25 and the faucet 18 . The first pipe 16 has one end connected to the first chamber 25, and the other end connected to an internal space 42, which will be described later. The first pipe 16 extends in the left-right direction 2 between the first chamber 25 and the faucet 18 .

The second pipe 17 is located above the first pipe 16 and extends from the outdoor space 12 to the indoor room 11. The second pipe 17 communicates the second chamber 26 and the faucet 18 . More specifically, the second pipe 17 has one end connected to the other end of the first pipe 16, and the other end connected to the second chamber 26. The second pipe 17 extends from the second chamber 26 to the left in the left-right direction 2, is bent at its left-extended tip, and extends downward in the up-down direction 1.

The faucet 18 supplies water at a location in the room 11 such as a kitchen or a bathroom. The faucet 18 is located slightly higher than the waist of the resident when standing. An opening 41 through which water can flow is formed in the faucet 18. The faucet 18 includes a handle 37 that is opened and closed by a resident, a spindle 38 that can be moved in the vertical direction 1 by operating the handle 37, and a top 39 that can be moved in the vertical direction 1 as the spindle 38 is moved up and down. It has a packing 40 that closes or opens a flow path formed in the opening 41 by the vertical movement of the piece 39. The opening 41 can be opened and closed by moving the packing 40 in the vertical direction 1 by operating the handle 37.

A pressure sensor 19 is attached to the edge of the opening 41 in the faucet 18 to detect whether the faucet 18 is opened or closed. The pressure sensor 19 detects the pressure of the packing 40 with the opening 41 closed. The pressure sensor 19 can output a detection signal to the controller 22. As the pressure sensor 19, for example, a gauge type pressure sensor such as a strain gauge type or a metal gauge type is used. The pressure sensor 19 contacts the packing 40 when the faucet 18 is closed, and separates from the packing 40 when the faucet 18 is open. The faucet 18 supplies water from the opening 41 when the handle 37 is opened, the spindle 38 moves upward, and the top located below the spindle 38 moves upward. When the handle 37 is operated to close, the spindle 38 moves downward, the top 39 is pushed down against the water pressure, the opening 41 is closed with the packing 40, and the water supply is stopped.

The faucet 18 is formed with an internal space 42 located below the opening 41 and a discharge port 43 through which water is discharged from the faucet 18 . The internal space 42 is a space in which water is stored when the opening 41 is closed with the packing 40, and communicates with the other end of the first pipe 16.

The pump 20 circulates water in a water circulation path 44 formed by the first chamber 25, the first pipe 16, the second pipe 17, and the second chamber 26, and purifies the water with the first filter 32. . Pump 20 is located within second chamber 26 and pumps water from second chamber 26 to first chamber 25 . In the circulation channel 44, water flows in the order of the first chamber 25, the first pipe 16, the second pipe 17, and the second chamber 26.

The check valve 21 blocks water from flowing from the second pipe 17 toward the first pipe 16 between the first pipe 16 and the second pipe 17 in the circulation flow path 44 . The check valve 21 is a so-called swing check valve located on a flow path connecting the first pipe 16 and the second pipe 17. The check valve 21 is placed in an open position (see FIG. 1) by water pressure when water flows in the circulation flow path 44. Further, when water does not flow in the circulation channel 44, it is located in the closed position due to its own weight (see FIG. 2), and even when water flows backward, it is located in the closed position due to water pressure. Thereby, the check valve 21 allows the flow of water from the first pipe 16 to the second pipe 17 and blocks the flow of water from the second pipe 17 to the first pipe 16.

As shown in FIG. 3, the controller 22 includes a CPU 50, a memory 51, and a communication bus 54. These components of the controller 22 are connected by a communication bus 54. The memory 51 is, for example, ROM, RAM, EEPROM, or the like. A program 56 for controlling various operations of the water supply device 10 is stored in the memory 51. The CPU 50 executes the program 56 while using the memory 51. The controller 22 is installed on the wall of the room 11 around the water supply device 10 (see FIG. 1). The controller 22 includes a power source 52 (see FIG. 3). The power source 52 is switched between a movable state in which the pump 20 can control the flow of water, and a stopped state in which power supply is stopped and the pump 20 cannot control the water flow.

Communication bus 54 is electrically connected to pressure sensor 19 and pump 20. The pressure sensor 19 outputs a first signal when the faucet 18 is closed, and outputs a second signal when the faucet 18 is open. Communication bus 54 receives a first signal or a second signal from pressure sensor 19 . The communication bus 54 generates and outputs control signals for driving or stopping the pump 20.

[Control of water supply device 10]
Control of the water supply device 10 according to the present invention will be explained below with reference to the flowchart shown in FIG. Control of the pump 20 in the water supply device 10 by the pressure sensor 19 is normally started when the power source 52 is on and the faucet 18 is closed. The following description assumes that control of the water supply device 10 is started at a certain time.

When control of the water supply device 10 is started, the tank 15 is filled with water supplied from the water main 9. The first chamber 25, the first tube 16, the internal space 42, the second tube 17, and the second chamber 26 are similarly filled with water. Further, a constant water pressure is applied from the water main pipe 9 to the tank 15, the first chamber 25, the first pipe 16, the internal space 42, the second pipe 17, and the second chamber 26 filled with water. At this time, since the pump 20 is driven and the check valve 21 is in the open position, water is circulating in the circulation channel 44. Note that when the power source 52 is off, water remains in the circulation channel 44 and does not circulate.

In the water supply device 10, the controller 22 first determines whether the second signal has been received from the pressure sensor 19 (S10). When the controller 22 does not receive the second signal from the pressure sensor 19 (S10: No), the controller 22 continues the determination until the second signal is received. That is, when the handle 37 is not opened by the resident and the faucet 18 remains closed, the gasket 40 remains in contact with the pressure sensor 19, so the controller 22 does not receive the second signal.

When the controller 22 determines in step S10 that the second signal has been received (S10: Yes), the controller 22 stops the pump 20 (S11). That is, when the handle 37 is opened by the resident and the faucet 18 is opened, the packing 40 is separated from the pressure sensor 19, so the controller 22 receives the second signal from the pressure sensor 19. As a result, the flow of water in the circulation channel 44 is stopped, the check valve 21 is moved to the closed position, and the water remains in the second pipe 17 and the second chamber 26. From the discharge port 43, water supplied from the water main 9 and distributed to the first chamber 25 and the first pipe 16 flows out due to water pressure from the water main 9.

The controller 22 determines whether the first signal is received from the pressure sensor 19 (S12). When the controller 22 does not receive the first signal from the pressure sensor 19 (S12: No), the controller 22 continues to make the determination until it receives the first signal. That is, when the handle 37 is not closed by the occupant and the faucet 18 remains open, the packing 40 remains separated from the pressure sensor 19, so the controller 22 does not receive the first signal.

When the controller 22 determines in step S12 that the first signal has been received (S12: Yes), it drives the pump 20 (S13). That is, when the handle 37 is closed by the resident and the faucet 18 is closed, the packing 40 comes into contact with the pressure sensor 19, and therefore the controller 22 receives the first signal from the pressure sensor 19. As a result, the outflow of water from the discharge port 43 is stopped, water circulates in the circulation channel 44, and the check valve 21 is pushed up by the water pressure and moved to the open position. At this time, water circulates in the circulation flow path 44 under the pressure of water from the water main pipe 9, and the water is purified by the first filter 32.

After driving the pump 20 (S13), the controller 22 determines whether the second signal is received again (S10) and repeats the above steps.

[Operations and effects of this embodiment]
According to this embodiment, since the controller 22 drives the pump 20 when the resident closes the faucet 18, the water remaining in the second pipe 17 and the second chamber 26 circulates through the circulation flow path 44. Thereby, the circulating water passes through the first filter 32 and is purified. Since the water remaining in the second pipe 17 and the second chamber 26 is purified, sanitary water can always be supplied from the faucet 18 without the need to dispose of the remaining water.

Furthermore, since the opening and closing of the faucet 18 can be detected by the pressure sensor 19 that detects the pressure of the packing 40 at the edge of the opening 41, it is not necessary to provide a large-scale mechanism to detect and control the opening and closing of the faucet 18. Therefore, sanitary water can be easily supplied from the faucet 18 with a small number of parts.

In addition, by preventing water from flowing from the second pipe 17 to the first pipe 16 by the check valve 21, unsanitary water in the second pipe 17 and the second chamber 26 before passing through the first filter 32 is prevented. It is possible to prevent the water from flowing backwards and being discharged from the faucet 18.

[Modified example]
In the above-described embodiment, the case where tap water is drawn into the water supply device 10 from the water main pipe 9 has been described as an example, but the configuration is not limited to this. For example, the water supply device 10A may include a water generation device 70 that extracts moisture from the air to obtain water.

As shown in FIGS. 5 and 6, the water supply device 10A according to the modification includes a water generation device 70, a storage tank 71, a tank 15A, a first pipe 16A, a second pipe 17A, and a faucet 18A. , a pressure sensor 19 , a pump 20 , a check valve 21 , a water level sensor 81 , and a controller 22 . In other words, the water supply device 10A according to the first modification is different from the above-described embodiment in that it includes the water generation device 70, the storage tank 71, and the water level sensor 81, and the configurations of the tank 15A, the first pipe 16A, and the second pipe 17A. different. Below, configurations, operations, and effects different from those of the above-described embodiments will be explained.

The water generator 70 takes in air from outdoors 72 or indoors 11 and sends extracted water to a storage tank 71. The water generating device 70 is located at a location higher than the faucet 18A, such as in the attic 74 of the building 8.

The storage tank 71 stores water extracted by the water generator 70. The storage tank 71 supplies water to the first chamber 25A. Note that an overflow (not shown) is installed in the storage tank 71 to prevent water from overflowing.

Tank 15A is arranged in outdoor space 12. The tank 15 is divided into a first chamber 25A and a second chamber 26A.

As shown in FIGS. 5 and 6, the first chamber 25A is located on the right side of the tank 15A. The first chamber 25A is divided into a first sub-chamber 77 and a second sub-chamber 78. A second filter 80 is located between the first sub-chamber 77 and the second sub-chamber 78. The functions of the second filter are similar to those of the first filter 32.

The first sub-chamber 77 is a space that stores water flowing in from the storage tank 71. The first sub-chamber 77 is located above the first chamber 25A. The first subchamber 77 is box-shaped. The first subchamber 77 is located downstream of the storage tank 71 in the flow direction. An inlet 30A through which water from the storage tank 71 flows is located in the first sub-chamber 77.

The inflow port 30A is located above the first sub-chamber 77 to the right in the left-right direction 2.

The second sub-chamber 78 is located below the first chamber 25A. That is, it is located downstream of the first sub-chamber 77 in the flow direction. The second subchamber 78 is box-shaped. The second sub-chamber 78 has the same dimensions as the first sub-chamber 77 in the left-right direction 2 and the front-back direction 3. Water flowing into the second sub-chamber 78 from the first sub-chamber 77 passes through a second filter 80 . A supply port 31A communicating with the first pipe 16A is located in the second sub-chamber 78.

The supply port 31A is located on the lower side of the second sub-chamber 78 to the left in the left-right direction 2. The supply port 31A is positioned offset from the inflow port 30A in the left-right direction 2. The supply port 31A is located to the left of the inflow port 30A in the left-right direction 2.

The second chamber 26A is located on the left side of the tank 15A and is adjacent to the second sub-chamber 78. The second chamber 26A has the same dimensions as the second sub-chamber 78 in the vertical direction 1 and the front-back direction 3. The second chamber 26A is smaller in size than the second sub-chamber 78 in the left-right direction 2. The second chamber 26A communicates with the second sub-chamber 78. Water flowing into the second subchamber 78 from the second chamber 26A passes through the first filter 32A. A return port 33A communicating with the second pipe 17A is located in the second chamber 26A.

The return port 33A is located below and on the left side of the second chamber 26A. The return port 33A is at the same position in the vertical direction 1 as the supply port 31A.

The first pipe 16A extends in the outdoor space 12 and the indoor space 11. The first pipe 16A communicates the second sub-chamber 78 and the faucet 18A. One end of the first pipe 16A is connected to the second sub-chamber 78, and the other end is connected to the internal space 42A. The first pipe 16A extends downward from the second sub-chamber 78 in the up-down direction 1, curves to the left, and extends downward in the left-right direction 2.

The second pipe 17A is located above the first pipe 16A in the vertical direction 1 and to the left in the left-right direction 2, and extends in the outdoor space 12 and the indoor room 11. The second pipe 17A communicates the second chamber 26A and the faucet 18A. One end of the second pipe 17A is connected to the second chamber 26A, and the other end is connected to the other end of the first pipe 16A. The second pipe 17A extends downward in the vertical direction 1 from the second chamber 26A, curves to the left, further extends to the left in the horizontal direction 2, and extends downward at its tip.

A water level sensor 81 that detects the water level in the second sub-chamber 78 is attached to the second sub-chamber 78 . The water level sensor 81 outputs a detection signal to the controller 22. The water level sensor 81 detects whether the second sub-chamber 78 is full of water supplied from the storage tank 71. As the water level sensor 81, for example, a float type, a radio wave type, an ultrasonic type, etc. are used.

As shown in FIGS. 6 and 7, the communication bus 54 is electrically connected to a water level sensor 81 in addition to the pressure sensor 19 and the pump 20. The water level sensor 81 outputs a third signal when the second sub-chamber 78 is full of water or more. Communication bus 54 receives a third signal from water level sensor 81 .

Control of the water supply device 10A according to the modified example will be explained below with reference to the flowchart shown in FIG. 8. Control by the pressure sensor 19 and water level sensor 81 of the pump 20 in the water supply device 10A is started when the power source 52 is on and the faucet 18 is closed, similarly to the above embodiment. At this time, the pump 20 is stopped and the check valve 21 is in the closed position.

The amount of water in the tank 15A depends on the amount of water extracted by the water generator 70, so it is not always full. Control is possible only when at least the second subchamber 78, first pipe 16A, internal space 42A, second pipe 17A, and second chamber 26A are filled with water. Therefore, the controller 22 first determines whether the third signal has been received from the water level sensor 81 (S30). In other words, it is determined whether the second sub-chamber 78 of the water supply device 10A is filled with water and enough water is stored to circulate the water in the circulation channel 44A. When the controller 22 does not receive the third signal from the water level sensor (S30: No), the controller 22 continues the determination until the third signal is received.

When the controller 22 receives the third signal from the water level sensor 81 (S30: Yes), it drives the pump 20 (S31). As a result, water circulates through the second sub-chamber 78, the first pipe 16A, the second pipe 17A, and the second chamber 26A as the circulation flow path 44A (see FIG. 6), and the check valve 21 moves to the open position. Water is purified by the first filter 32A.

Next, the controller 22 determines whether the second signal is received from the pressure sensor 19 (S32). When the controller 22 does not receive the second signal from the pressure sensor 19 (S32: No), the controller 22 continues the determination until the second signal is received. That is, when the handle 37 is not opened by the occupant and the faucet 18 remains closed, the packing 40 remains in contact with the pressure sensor 19, and the controller 22 does not receive the second signal.

When the controller 22 determines in step S32 that the second signal has been received (S32: Yes), the controller 22 stops the pump 20 (S33). As a result, the flow of water in the circulation channel 44A is stopped, the check valve 21 is moved to the closed position, and the water remains in the second pipe 17 and the second chamber 26. Water supplied from the storage tank 71 flows into the first sub-chamber 77, the second sub-chamber 78, and the first pipe 16A, and flows out from the faucet 18A.

The controller 22 determines whether the first signal is received from the pressure sensor 19 (S34). When the controller 22 does not receive the first signal from the pressure sensor 19 (S34: No), it continues to make the determination until it receives the second signal. That is, when the handle 37 is not closed by the occupant and the faucet 18 remains open, the packing 40 remains separated from the pressure sensor 19, so the controller 22 does not receive the first signal.

When the controller 22 determines in step S34 that the first signal has been received (S34: Yes), it again determines whether the third signal has been received (S30), and repeats the above-described steps.

[Effects of modified examples]
Moreover, water can be extracted from the surrounding air and the extracted water can be stored in the tank 15A. As a result, you can secure water even in the event of a water outage, and you can also stock up on water on a regular basis in case of a disaster. Further, the extracted water can be purified by the first filter 32A, so it can be used as drinking water.

Moreover, even if water is sent from the tank 15A to the faucet 18A through the first pipe 16A without circulating from the first pipe 16A to the second pipe 17A and the second chamber 26A, Since the water is purified by the filter 80, sanitary water can be supplied from the faucet 18A.

[Other variations]
In the above embodiment, the other end of the first pipe 16 is connected to the faucet 18, and one end of the second pipe 17 is connected to the other end of the first pipe 16. It is not limited to this configuration. For example, the other end side of the first pipe 16 may be connected to the internal space 42, and the one end side of the second pipe 17 may also be connected to the internal space 42. In this case, the circulation path is formed by the first chamber 25, the first tube 16, the internal space 42, the second tube 17, and the second chamber 26.

Further, in the above-described embodiment, the position of the supply port 31 in the vertical direction 1 is generally the same as the position of the inflow port 30 in the vertical direction 1, but the configuration is not limited to this. The position of the supply port 31 in the vertical direction 1 may be shifted from the position of the inflow port 30 in the vertical direction 1.

Furthermore, in the embodiment described above, the check valve 21 is located in the open position due to water pressure when water flows in the circulation flow path 44, and when water does not flow in the circulation flow path 44 and when the check valve 21 is in the open position from the second pipe 17 to the first Although the explanation has been given using an example in which the water is placed in the closed position due to water pressure when flowing back into the pipe 16, the structure is not limited to this. The check valve 21 may be an electromagnetic valve that is driven to an open position and a closed position by a signal from the controller 22, for example. In this case, the solenoid valve is electrically connected to the controller 22 and switched between the open position and the closed position based on the first signal and second signal from the pressure sensor 19.

10, 10A... Water supply device 15, 15A... Tank 16, 16A... First pipe 17, 17A... Second pipe 18, 18A... Faucet 19... Pressure sensor (detection part )
20... Pump 21... Check valve 22... Controller (control unit)
25, 25A... First chamber 26, 26A... Second chamber 30, 30A... Inflow port 31, 31A... Supply port 32... First filter 33, 33A... Return port 70 ...Water generator 77...First sub-chamber 78...Second sub-chamber 80...Second filter

Claims (5)

A tank where water is stored,
faucet and
a first pipe communicating the tank and the faucet;
a second pipe communicating the tank and the faucet;
pump and
a detection unit that detects opening and closing of the faucet;
It is equipped with a control unit, and
The tank is divided into a first chamber and a second chamber,
An inlet through which water flows and a supply port communicating with the first pipe are located in the first chamber,
A return port communicating with the second pipe is located in the second chamber,
The pump sends water from the second chamber to the first chamber through a first filter,
The above control section is
driving the pump based on a detection signal from the detection unit indicating that the faucet is closed;
A water supply device that stops the pump based on a detection signal from the detection unit indicating that the faucet is open. The faucet has an opening through which water can flow, and a packing that opens and closes the opening,
The water supply device according to claim 1, wherein the detection section is a pressure sensor that detects the pressure of the packing. The water supply device according to claim 1 or 2, further comprising a check valve in the second pipe that allows water to flow toward the tank. It is further equipped with a water generator that extracts moisture from the air to obtain water.
The water supply device according to claim 1 or 2, wherein the water generation device supplies water to the tank. The first chamber is divided into a first sub-chamber where the inflow port is located and a second sub-chamber where the supply port is located,
The second sub-chamber can flow water through the first sub-chamber and the second filter,
The water supply device according to claim 4, wherein the pump sends water from the second chamber to the second sub-chamber.

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