JP2000023580A - Watering device and planting pot equipped therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water supply equipment that can retain its initial water- supplying characteristics, can continue water supply as it corresponds to changes in the cultivation conditions of potted plants in no need of electric power. SOLUTION: This water supply equipment comprises the first water tank 11; the openable tube 12 that extends from the upper part of the first water tank 11 and tightly seals the inside of the first water tank 11, when the flow path is closed to inhibit the water from flowing out, while the inside of the first water tank 11 is made at a normal pressure to allow the water in the tank to flow out, when the flow path is opened; the second water tank 13, that is communicated to the first water tank 11, arranged below the first water tank 11, receives the water flow from the first tank 11 and inhibits the water level of the openable tube 12 from rising by the air compression in the first water tank 11; the water-supplying nozzle 15 that is attached to the second water tank 13 to feed water to a plant pot 10, when the first water tank becomes at a normal pressure; and the water trap 17 that traps the water flowing out of the plant pot 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply device for automatically supplying a required amount of water to a potted plant and a flowerpot to which the water supply device is attached.

[0002]

2. Description of the Related Art When cultivating a potted plant, it is also practiced to obtain and cultivate a flower in its heyday, while appreciating it, and then discard it.

[0003] However, in many cases, perennials, pests,
In order to appreciate flowers such as potted flowers and bonsai, which are at their peak during one to two weeks, watering or fertilizing for one year is performed. During this time, there is a risk that important plants will be damaged or die due to slight carelessness, several days of travel, or continuous extreme sunshine.

[0004] In order to prevent such a risk, various techniques for automatically supplying water to potted plants have been proposed.

That is, as a technique for automatically supplying water to a potted plant, for example, a thin tube is set up in a water storage tank containing water, and the water in the water storage tank is sucked up by the thin tube using the capillary phenomenon. There are known a technique for supplying water, a technique for installing an unglazed container from which stored water soaks in a flowerpot, and a technique for attaching a water supply pipe to a water tap via an electric timer.

[0006] In this specification, "water" is used as a generic term for liquids supplied to potted plants. Therefore, "water" in the present specification includes not only water in a narrow sense such as tap water, but also liquid fertilizer, so-called liquid fertilizer.

[0007]

However, the above-described automatic water supply technology has the following problems.

That is, in the technique utilizing the capillary phenomenon, the initial characteristics cannot be stably maintained due to contamination of the inner wall of the thin tube and deterioration of the thin tube itself.

[0009] Further, the technique using unglazed containers requires that the water supply amount and water supply interval be finely adapted to changes in cultivation conditions such as the size and characteristics of plants to be cultivated, daily sunlight conditions and humidity, and the season in which plants are cultivated. Can not.

The technique using the electric timer cannot be implemented in a place where a power supply cannot be secured. Such a problem does not occur with a battery-driven timer, but if the battery is exhausted, water cannot be supplied.

Accordingly, an object of the present invention is to provide a water supply device capable of stably maintaining an initial water supply characteristic for a potted plant, and a flowerpot to which the water supply device is attached.

Another object of the present invention is to provide a water supply device capable of supplying water according to changes in cultivation conditions of potted plants, and a flowerpot to which the water supply device is attached.

Still another object of the present invention is to provide a water supply device capable of supplying water to a potted plant without requiring a power supply, and a flower pot to which the water supply device is attached.

[0014]

In order to solve the above-mentioned problems, a water supply apparatus according to the present invention communicates with a first water storage tank for storing water supplied to a potted plant, and the first water storage tank. And extending from the upper part of the first water tank,
When the flow path is closed, the inside of the first water storage tank is closed to prevent outflow of water in the tank, and when the flow path is open, the inside of the first water storage tank is set to the normal pressure state and the inside of the tank is closed. An open / close tube that allows outflow of water, and a first water tank that is installed below the first water tank in communication with the first water tank, and that is in a sealed state while the water in the first water tank flows in. A second water storage tank that suppresses a rise in the water level of the open / close tube due to air shrinkage in the water storage tank, and a second water storage tank that is attached to the second water storage tank, the flow path of the open / close tube is opened, and the first water storage tank is brought into a normal pressure state. The water supply nozzle, at which the water flows out to the flowerpot when it becomes, and the running water reservoir, in which the tip of the open / close tube is arranged at a predetermined distance from the bottom surface and the water supplied from the water supply nozzle and flowing out of the flowerpot is stored. The water level of the running water reservoir is higher than the end of the open / close tube The water in the flowing water storage part is sucked into the open / close tube by the water in the first water storage tank that descends by its own weight to form a decompression space when the water is in the open / close tube, and the flow path is closed. Is characterized in that the water flows out and the flow path is opened.

According to such an invention, since the thin tube utilizing the capillary phenomenon is not used, it is possible to stably maintain the initial water supply characteristics to the potted plant.

Further, according to the present invention, it is possible to supply water in a finely tuned manner to the cultivation conditions of a potted plant.

Further, according to the present invention, water is supplied by opening and closing the open / close tube by the water in the flowing water storage unit, so that water can be supplied to potted plants without requiring a power source. Will be possible.

[0018]

Embodiments of the present invention will be described below more specifically with reference to the drawings. Here, the same reference numerals are given to the same members in the attached drawings,
In addition, duplicate description is omitted. The embodiments of the present invention are particularly useful forms in which the present invention is implemented, and the present invention is not limited to the embodiments.

FIG. 1 is a perspective view showing a water supply device according to an embodiment of the present invention together with a flowerpot, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIG. 3 is a sectional view showing a part of the water supply device of FIG. ,
FIG. 4 is an explanatory view showing an operation of supplying water to a potted plant by the water supply apparatus of FIG. 1, and FIG. 5 is a schematic view showing a modification of the water supply apparatus of FIG. In FIGS. 1 and 2, potted plants are not shown.

As shown in FIGS. 1 and 2, in the water supply apparatus of the present embodiment, a first water storage tank 11 is attached so as to surround an upper part of a flower pot 10. A water inlet 11a is formed in an upper part of the first water storage tank 11, and water supplied to the potted plant P (FIG. 3) is supplied to the water inlet 11a.
Injected from. In order to close the water inlet 11a, a cap 11b is attached to the water inlet 11a. The cap 11b has an inner diameter of, for example, 10
The opening and closing tube 12 communicating with the first water storage tank 11 is connected. A water outlet 11c is formed on the bottom surface of the first water storage tank 11. The inner diameter of the opening / closing tube 12 can take a value other than the above-mentioned value.

In such a first water storage tank 11, when the flow path of the open / close tube 12 is closed, the inside of the first water storage tank 11 containing water is closed, and the water in the tank is filled with the flowing water port 11.
c is prevented from flowing out. When the flow path of the opening / closing tube 12 is opened, the atmosphere is introduced from the opening / closing tube 12 and the inside of the first water storage tank 11 is brought into a normal pressure state,
Water in the tank flows out from the water outlet 11c.

Below the first water storage tank 11, a second water storage tank 13 is provided. The second water storage tank 13 is connected to the first water storage tank 11 via a communication tube 14 attached to a water outlet 11c formed in the first water storage tank 11. Therefore, the water that has flowed out of the first water storage tank 11 in which the flow path of the opening / closing tube 12 has been opened and is in a normal pressure state flows into the second water storage tank 13 through the communication tube 14.

The second water tank 13 is provided with a water supply nozzle 15 for supplying the water flowing into the second water tank 13 from the first water tank 11 to the plant P in the flowerpot 10 in this manner.
It is attached with its tip facing inside the flowerpot 10.
In the present embodiment, the number of the water supply nozzles 15 is one, but a plurality of water supply nozzles 15 may be attached so that water is supplied evenly to the entire flowerpot 10. Also, a shower head may be attached to the tip of the water supply nozzle 15 so that water can be supplied over a wider area.

As shown in detail in FIG. 2, the second water tank 1
The leading end of the communication tube 14 inserted in 3, that is, the inflow position of water from the first water storage tank 11 in the second water storage tank 13 is determined by the base of the water supply nozzle 15 attached to the second water storage tank 13. (In the present embodiment, the base of the water supply nozzle 15 is located above the second water storage tank 13, whereas the inflow position of water from the first water storage tank 11 is the second water storage tank 11. (Near the bottom of the water storage tank 13). The cross-sectional area of the second water storage tank 13 in the lateral direction is much larger than the cross-sectional area of the open / close tube 12, for example, 5 mm.
It is set to about 0 to 100 times.

Therefore, the air pressure in the first water storage tank 11 which is in a closed state decreases due to a decrease in air temperature and the like, and the air shrinks, so that the second water storage tank 13 and the open / close tube 12 are separated from each other in order to balance. When water is sucked into the first water storage tank 11, the rise in the water level in the open / close tube 12 is slightly suppressed. When the water is sucked into the first water storage tank 11 as described above, the water level of the second water storage tank 13 also falls, but the lowered position is from the first water storage tank 11 to the second water storage tank 13. Far above the location of water inflow into the water. Therefore, the air does not flow into the communication tube 14 because the water level in the second water storage tank 13 has dropped.

As a result, a large amount of water stored in a running water storage section 17 described later is sucked up by the open / close tube 12 to open the flow path of the open / close tube 12, thereby preventing unnecessary water supply.

However, since the amount of water sucked from the second water storage tank 13 and the opening / closing tube 12 also depends on the volume of the first water storage tank 11, the horizontal cross-sectional area of the second water storage tank 13 The relationship with the cross-sectional area of the opening / closing tube 12 is not limited to the value described above.

The flowerpot 10 is set on the receiving tray 16. A running water storage unit 17 for storing water supplied from the water supply nozzle 15 and flowing out from the bottom of the flowerpot 10 is provided on the receiving tray 16 with an outer wall 22 having a height of, for example, about 1 to 3 cm.
It is formed so as to be sandwiched between. That is, FIG.
As shown in FIG. 2, a cutout portion 18 for guiding water flowing out from the bottom of the flowerpot 10 to the running water storage portion 17 is formed, whereby all the water from the flowerpot 10 is guided to the running water storage portion 17. It is stored here.

In this embodiment, the running water reservoir 17 is formed in the tray 16,
Alternatively, it may be provided separately. In addition, the tray 16
It is also possible to provide the running water storage section 17 without providing the water flow path and guide the water flowing out of the flowerpot 10 to the running water storage section 17. Furthermore, the height of the outer wall 22 is 1 to 3c described above.
The height is not limited to about m, and can be freely set to a required height according to the size of the flowerpot 10 and the like.

In the flowing water storage unit 17, the tip of the openable tube 12 is arranged at a predetermined distance from the bottom surface. Here, at a predetermined interval, an interval of about 2 to 3 mm at which water can enter and exit without difficulty from between the bottom surface and the tip of the opening / closing tube 12, or, as described later, the flowing water storage unit 17 is connected to the first area 17a. When it is divided into the second area 17b, for example, the horizontal line passing through the upper end of the partition wall 20 and the horizontal line passing through the tip of the opening / closing tube 12 are almost at the same height or the latter is located above and about 1 mm. Can be applied. However, the distance between the end of the open / close tube 12 and the bottom surface of the flowing water storage unit 17 can take a value other than the above-mentioned value.

A stopper 19 having a projection 19a having an outer diameter smaller than the inner diameter of the opening / closing tube 12 is fixed to the flowing water reservoir 17 with the projection 19a facing upward. Then, the projection 19a is inserted into the opening / closing tube 12 as shown in FIG.
No. 2 is positioned at the running water storage part 17 without being blocked by the protrusion 19a.

As shown in FIG. 3, the flowing water storage section 17 is divided into a first area 17 a where the tip of the open / close tube 12 faces, and a first area 17 a by the partition wall 20.
And the second area 17b to which the water flowing out of the second area 17 is guided. Also, the bottom surface of the second area 17b is lower than the bottom surface of the first area 17a. By dividing the two areas 17a and 17b with the partition wall 20 and lowering the bottom surface of the second area 17b in this manner, water flowing out of the opening / closing tube 12 as described later causes the partition wall 20 to pass through the partition wall 20. It is prevented from flowing over into the second area 17b and flowing back to the first area 17a. However, as described above, the two areas 17a,
Since the predetermined effect can be obtained even if it is not divided into 17b, the flowing water storage section 17 does not necessarily have to be divided into the first area 17a and the second area 17b.

It should be noted that the first outflow from the opening / closing tube 12
The first area 17a and the second area 17b are separated by the partition wall 20 as long as the water flowing from the area 17a to the second area 17b can be prevented from flowing back to the first area 17a. The first structure, the second
When the second structure is such that the bottom surface of the area 17b is lower than that of the first area 17a, the backflow of water is prevented by one of the first structure and the second structure. It just needs to be. Therefore, the flowing water storage section 17 does not necessarily need to have these two structures. However, considering the problem of surface tension acting between the open / close tube 12 and the water stored in the flowing water storage unit 17 and the installation of the evaporation promoting member 21 described below, the flowing water storage unit 1
7 preferably has both the first structure and the second structure.

An evaporation promoting member 21 is provided in the flowing water storage unit 17. The evaporation promoting member 21 provided in the second area 17b is made of, for example, a porous material such as unglazed pottery or sponge, or a fibrous material such as a non-woven fabric. It increases the surface area and serves to evaporate more water. Therefore, the evaporation rate of water in the flowing water storage unit 17 can be adjusted by the size and number of the evaporation promoting members 21. Therefore, in the case shown in the figure, two evaporation promoting members 21 having mutually different sizes are installed, but two having the same size may be provided, and three or more having the same or different size may be provided. May be. Further, needless to say, one may be used.

As the evaporation promoting member 21, various materials such as unglazed pottery other than those described above and which increase the surface area of water by sucking water can be used. However, the height of the evaporation promoting member 21 is desirably higher than the height of the outer wall 22 because the surface of the water is increased by absorbing the water in the flowing water storage unit 17. In addition, running water storage unit 1
In the case where the evaporation rate of water is not adjusted in 7 or the desired evaporation rate is obtained when the evaporation promoting member 21 is not used, such an evaporation promoting member 21 can be omitted.

Here, when the evaporation promoting member 21 is not provided, the amount of water evaporation from the flowing water storage unit 17 per day in fine weather is about 1 mm in winter, about 2 to 3 mm in spring and autumn, and about 4 to 3 in summer. About 6mm, 6-8mm in a heated winter room
It is about. The use of the evaporation promoting member 21 can increase the value of the amount of evaporation to about 10 to 20 times. However, the above values slightly vary depending on measurement conditions and regions.

Next, the operation of the water supply apparatus having the above configuration will be described.

When the cap 11b is removed and water is injected into the first water tank 11 from the water inlet 11a, the water flows into the second water tank 13 through the communication tube 14. When the inside of the second water storage tank 13 is full, the water supply nozzle 1
Water is supplied from 5 to the flowerpot 10 (FIG. 4A). In addition,
At this time, no water exists in the opening / closing tube 12.

When the water is sufficiently supplied in this way,
Excess water flowing out from the bottom of the flowerpot 10 is gradually stored in the flowing water storage unit 17. Further, at this time, since the water gradually decreases in the first water storage tank 11, air is taken in from the opening / closing tube 12 in accordance with the decrease.

In the present embodiment in which the flowing water storage section 17 is divided into a first area 17a and a second area 17b, and water from the flowerpot 10 is guided to the second area 17b. The water from the flowerpot 10 first fills the second area 17b, and then flows over the partition wall 20 into the first area 17a. Then, when the amount of water in the first area 17a gradually increases and the water surface reaches the end of the open / close tube 12, this water is sucked into the open / close tube 12 instead of air. Thereby, the flow path of the opening / closing tube 12 is closed, and the inside of the first water storage tank 11 is closed. Then, the depressurized space is formed by the water in the first water storage tank 11 descending by its own weight.

When the pressure in the formed decompression space drops to a predetermined level, the water in the first water storage tank 11 cannot descend. As a result, the flow of water from the first water storage tank 11 to the second water storage tank 13 is stopped, and water supply from the water supply nozzle 15 to the flowerpot 10 is stopped (FIG. 4B). Although the water supply is stopped, the surplus water in the flowerpot 10 continuously flows into the flowing water storage unit 17 and is filled with water so as to get over the outer wall 22.

If the water is left in such a state, the water in the flowing water storage portion 17 gradually evaporates, and the water surface becomes lower than the tip of the openable tube 12. Then, the water in the open / close tube 12 flows out to open the flow path, and air is taken into the first water storage tank 11 from the open / close tube 12 to bring the first water storage tank 11 into a normal pressure state. In the present embodiment, which is divided into two areas 17a and 17b, the evaporation rate of water is higher in the second area 17b in which the evaporation promoting member 21 is installed, so that as shown in FIG. The water level of the second area 17b is lower than that of the first area 17a.

As a result, the water in the first water storage tank 11 can again descend by its own weight, and the second water storage tank 13
Flows into. Then, the water supply from the water supply nozzle 15 attached to the second water storage tank 13 to the flowerpot 10 is restarted (FIG. 4C).

When the surface of the water stored in the flowing water storage unit 17 by the water supply reaches the tip of the open / close tube 12 again, the water in the flowing water storage unit 17 is sucked into the open / close tube 12 and the first water is sucked.
A decompression space is formed in the water storage tank 11 of the water supply nozzle 15.
Then, the water supply to the flowerpot 10 is stopped (FIG. 4D).

Then, such water supply and water supply stop are as follows.
The process is repeated until the water in the first water storage tank 11 runs out.

As described above, according to the present embodiment, the initial water supply characteristics for the potted plant P can be stably maintained because no capillary tube utilizing the capillary phenomenon is used.

If the pot in which the plant P to be cultivated is planted is small, water immediately flows out of the flowerpot 10 into the running water storage unit 17, the open / close tube 12 is closed, and water supply is stopped. On the other hand, if the pot is large, the supplied water sufficiently spreads over the entire flowerpot 10, and then the water flows out to the flowing water storage unit 17 to close the opening / closing tube 12, thereby stopping the water supply.

Further, on the day when the sun is strong or the temperature is high,
On a day with low humidity or a day with strong wind, the evaporation rate of water in the flowing water storage unit 17 increases, so that the water supply interval is shortened and a large amount of water is supplied to the plant P. On the other hand, when the sunshine is weak, the temperature is low, the humidity is high, or the wind is weak,
Since the evaporation rate of water becomes slow, the water supply interval becomes long and only a small amount of water is supplied to the plant P, and there is no need to worry about waste of water or root rot.

Therefore, according to the present embodiment, it is possible to supply water in a finely tuned manner to the cultivation conditions of the potted plant P.

According to the present embodiment, water is supplied by opening and closing the opening and closing tube 12 by the water in the flowing water storage unit 17, so that water is supplied to the potted plant P without requiring a power source. It is possible to do.

According to the present embodiment, when raining or watering with a watering can, the amount of water given is added to the water supply interval. In the cultivation of the plant P, which is difficult to perform, it is possible to prevent forgetting to supply water by using the present water supply device to assist watering with a watering can.

According to the present embodiment, not only can labor saving of plant cultivation be achieved by grasping the time until the first water tank 11 filled with water becomes empty. Even if there is a period during which water cannot be supplied due to travel or the like, the potted plant P will not die.

According to the present embodiment, by using liquid fertilizer as a liquid to be supplied, it is possible to supply nutrients to a potted plant P over several days if a diluted fertilizer is supplied once.

Here, if the number of the evaporation promoting members 21 provided in the flowing water storage section 17 is large or large, the evaporation rate of water is increased and the water supply interval is shortened. Further, if the evaporation promoting member 21 is removed, the evaporation rate of water becomes slow and the water supply interval becomes long. Therefore, the evaporation promoting member 21
By shortening the water supply interval, it is possible to create the best cultivation conditions for plants P that like water, such as irises, oysters, wisteria, heron grass, and the like. on the other hand,
By removing the evaporation promoting member 21 and lengthening the water supply interval, it becomes possible to cultivate cactus or the like, or cultivate dormant grasses and bulbs in a dormant period. The water supply amount can be controlled by adjusting the distance from the tip of the open / close tube 12 to the outer wall 22 of the flowing water storage unit 17.

According to the present embodiment, the water flowing out of the opening / closing tube 12 passes over the partition wall 20, flows into the second area 17b, and is prevented from flowing back to the first area 17a. As a result, the opening / closing tube 12 is opened and the time for the first water storage tank 11 to be in the normal pressure state is not shortened, and the water supply is completed at once and the running water storage unit 17 is filled with water. Will be possible.

In this embodiment, the first water storage tank 11 and the second water storage tank 13 are directly attached to the flower pot 10, but as shown in FIG.
It may be separate from.

Further, the flower pot 10 and the saucer 16 are arranged in the same manner as in FIG.
Alternatively, they may be formed integrally with each other as shown in FIG. 5, or may be formed separately from each other as shown in FIG. A plant shelf on which a plurality of flower pots 10 can be placed may be used, and the tray 16, the first water storage tank 10, the second water storage tank 13, and the like may be installed on this flower shelf.

Further, in the present embodiment, the flower pot 10 which is circular when viewed from above is shown. However, various flower pots such as a flower pot which is generally called a container and which is substantially rectangular when viewed from above are generally used. Shaped flower pots can be used.

In this embodiment, the opening / closing tube 12 is connected to the cap 11b for closing the water inlet 11a of the first water storage tank 11, but as shown in FIG. And can be separate from each other. That is, the opening and closing tube 12 is
What is necessary is just to connect with the 1st water storage tank 11 and to extend from the upper part of this 1st water storage tank 11, and to be attached.

As shown in FIG. 2, the communication tube 14 is not inserted into the second water storage tank 13 so that the end thereof reaches near the bottom of the second water storage tank 13.
As shown in FIG. 5, the second water storage tank 13 may be opened at the bottom. That is, no matter how the communication tube 14 is attached, the inflow position of the water from the first water storage tank 11 in the second water storage tank 13 is determined by the water supply nozzle 15 attached to the second water storage tank 13. It suffices if the position is lower than the base.

[0061]

As apparent from the above description, the following effects can be obtained according to the present invention.

(1) Since a capillary tube utilizing the capillary phenomenon is not used, it is possible to stably maintain the initial water supply characteristics for a potted plant.

(2) Since water is supplied to the plants in accordance with the degree of evaporation of the water in the flowing water storage section, water supply can be provided that precisely corresponds to cultivation conditions such as the size and characteristics of plants to be cultivated, sunshine conditions and temperature and humidity. It is possible to do.

(3) Since water is supplied by opening and closing the open / close tube by the water in the flowing water storage section, it is possible to supply water to potted plants without requiring a power source.

(4) Since the amount of water given by means other than the water supply device is added to the water supply interval, it is possible to prevent forgetting to supply water by using this water supply device to assist watering with a watering can. become.

(5). By knowing the time until the first water tank filled with water becomes empty, not only labor saving of plant cultivation can be achieved but also water supply. Even if there is a period in which potted plants cannot be removed, potted plants will not die.

(6) By using liquid fertilizer as the liquid to be supplied, it is possible to supply nutrients to potted plants over several days if a diluted fertilizer is supplied once.

(7) Since the water supply interval can be adjusted by controlling the evaporation rate of the water in the flowing water storage section by the evaporation promoting member, it is possible to supply water according to the type of plant and the cultivation time. Become.

(8) Since the water flowing out of the opening / closing tube is prevented from flowing back from the second area to the first area, the opening / closing tube is opened and the first water storage tank is opened. The time to be in the normal pressure state is not shortened, and the water supply can be completed at a stretch.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a water supply device according to an embodiment of the present invention together with a flowerpot.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a sectional view showing a part of the water supply device of FIG. 1 in detail.

FIG. 4 is an explanatory diagram showing an operation of supplying water to a potted plant by the water supply device of FIG. 1;

FIG. 5 is a schematic view showing a modification of the water supply device of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Flower pot 11 1st water tank 11a Water inlet 11b Cap 11c Water outlet 12 Opening / closing tube 13 Second water tank 14 Communication tube 15 Water supply nozzle 16 Receiving part 17 Flowing water storage part 17a 1st area 17b 2nd area 18 cutting Notch 19 Stopper 19a Projection 20 Partition wall 21 Evaporation promoting member 22 Outer wall P Plant

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A01G 27/00 505F

Claims (5)

[Claims] A first water storage tank for storing water supplied to the potted plant; a first water storage tank communicating with the first water storage tank and extending from an upper portion of the first water storage tank; When is closed, the inside of the first water storage tank is closed to prevent outflow of water in the tank, and when the flow path is open, the inside of the first water storage tank is set to normal pressure and the tank is closed. An opening / closing tube that allows outflow of water inside, and is installed below the first water storage tank in communication with the first water storage tank, so that the water in the first water storage tank flows in and is sealed. A second water storage tank that suppresses a rise in the water level of the open / close tube due to air shrinkage in the first water storage tank; and a second water tank that is attached to the second water storage tank and that opens and closes the flow path of the open / close tube. A water supply nozzle that allows water to flow into the flower pot when the water tank at normal pressure A tip end of the open / close tube disposed at a predetermined distance from the bottom surface, and a running water storage part for storing water supplied from the water supply nozzle and flowing out of the flowerpot; and a water surface of the running water storage part. When is located at a position higher than the tip of the open / close tube, the water in the flowing water storage portion is sucked into the open / close tube by water in the first water storage tank that descends by its own weight to form a decompression space, and the flow path The water supply device is characterized in that the water in the open / close tube flows out and the flow path is opened when the water supply is closed and at a low position. 2. The water supply device according to claim 1, wherein the running water storage section is provided with an evaporation promoting member that increases the surface area of the water by absorbing the water in the running water storage section. 3. A first area facing the tip of the open / close tube and a first area adjacent to the first area and separated from the first area by a partition wall.
And a second area in which water from the flowerpot is guided, the structure including at least one of the structure of (1) and a second structure having a bottom surface lower than the first area. Item 3. The water supply device according to item 1 or 2. 4. A cross-sectional area of the second water storage tank in a lateral direction is set to be larger than a cross-sectional area of the open / close tube, and an inflow position of water from the first water storage tank in the second water storage tank is The water supply device according to claim 1, 2 or 3, wherein the water supply nozzle is located at a position lower than a base of the water supply nozzle. 5. A flowerpot equipped with the water supply device according to claim 1, 2, 3 or 4.