JPH0313168Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention automatically applies not only flowers and plants planted in flowerpots, flower beds, and other places, but also cultivated plants grown in home gardens, etc. The present invention relates to an automatic irrigation device that performs irrigation.

[Conventional technology]

When growing plants in flower pots, flower beds, vegetable gardens, etc., it is necessary to supply water regularly. However, such regular water supply work tends to be delayed for busy people, and when people are away from home due to outings, trips, etc., regular water supply is often not possible, and cultivated plants may wither and die. etc. are invited. For this reason, several automatic irrigation devices have been devised in the past. For example, one that utilizes the capillary action of fibers to sequentially supply water from a water storage tank to flowerpots, and one that gradually supplies water from an inverted container to a saucer while maintaining a balance with outside air pressure from the bottom of the closed container. A manual opening/closing valve is installed in the water inlet, which is connected to a water injection pipe that hangs down from the water storage part, and in the air vent passageway that discharges the air in the water storage part. A water supply tube is used to supply water from the water intake port at the bottom of the water storage tank installed at the top to a ceramic cup inserted into the soil, and water is supplied sequentially depending on the absorbency of the soil (Jetgen 60 -90653).

[Problem that the invention attempts to solve]

However, in both the above-mentioned methods that utilize capillary action and those that use an inverted airtight container, water is supplied continuously regardless of the dryness of the soil, so the soil becomes overly moist and root rot occurs. Not only does this cause problems, but the water in the tank is consumed in a short period of time, making it impossible to provide a stable water supply over a long period of time.
In addition, a ceramic cup that supplies water sequentially according to the absorbency of the soil eliminates the drawbacks of the former two methods, that is, those that utilize capillary action and those that use an inverted container, and provide a stable water supply over a long period of time. It is the most suitable automatic irrigation system because it can ensure the following. However, when pouring water into the water storage tank, a manual opening/closing valve provided in the air vent passage must be opened, and when the water filling is finished, the manual opening/closing valve must be closed. If this opening/closing operation is neglected, water may not be able to be supplied into the ceramic cup, and the supplied water may quickly flow out due to the head pressure. In this way, not only does it take time and effort to manually open and close the valve each time you pour water, but you may forget to open and close the valve from time to time and supply water with the valve closed or leave it open for a long time. This has led to a situation where stable water supply cannot be secured in Watatsute. This invention improves the latter type of automatic irrigation system that uses ceramic cups, and allows for a stable water supply over a long period of time depending on the dryness of the soil, without having to open or close valves to vent air. The purpose is to provide automatic irrigation equipment.

[Means for solving problems]

The automatic irrigation device according to this invention has a water inlet connected to a water injection pipe that hangs down inside the water storage part and an air vent passageway for discharging the air in the water storage part in the ceiling, and a water storage with a water intake opening near the bottom. A tank, a porous ceramic cup having a water inlet and inserted into the soil, and a flexible ceramic cup having one end connected to the water intake of the water storage tank and the other end connected to the water inlet of the ceramic cup. The automatic watering device comprising a water supply tube is characterized in that the air vent passage is provided with a check valve that prevents air from entering from the outside of the water storage tank into the inside.

[Effect]

The automatic irrigation device according to this invention configured as above is as follows:
When water is poured into the water tank through the water inlet, the water flows into the water storage section. After the lower end opening of the water injection pipe is blocked by the water injected during the water injection process,
The air chamber in the water storage area around the water injection pipe becomes pressurized by the head pressure rising inside the water injection pipe, but at this time, the check valve installed in the air vent passage automatically opens and the air chamber inside the air chamber becomes pressurized. Since the air is released to the outside, it is filled in the water reservoir. When the water storage tank is full, water injection is stopped, and the ceramic cup is completely filled with water from the water supply tube to the ceramic cup, and the ceramic cup is inserted into the soil of a flowerpot or the like. At first, water tries to seep out from inside the ceramic cup due to the head pressure inside the water storage tank, but if the water level in the water storage area around the water injection pipe drops slightly, the negative pressure generated by the drop causes the water to seep out. The stop valve automatically closes the air vent passage, and the water in the water injection pipe ceramic cup is maintained in a sealed state.After that, water is gradually supplied into the soil by the soil's moisture suction power. Become.

〔Example〕

The drawing is a longitudinal cross-sectional view of an automatic irrigation device showing the implementation of this invention.

As shown in the figure, the automatic irrigation system according to this invention is composed of a water storage tank 10, a water supply tube 30, and a ceramic cup 40. The water storage tank 10 is made of plastic, for example.
A water inlet 12 and an air vent passage 13 are opened in the ceiling part 11. A water injection pipe 14 is provided in the water injection port 12.
is connected, and this is suspended into the water storage part 15,
Its lower end 14a reaches near the inner bottom of the water storage tank 10. Further, in the air vent passage 13, an elastic valve plate 17 is inserted into the valve chamber 16, and the valve chamber 16 is provided with an elastic valve plate 17.
6 is provided with a check valve 20 capped by a cap 19 having a vent hole 18 and a resilient valve plate 17
The air vent passage 13 is opened and closed by the opening and closing of the air vent passage 13. In the figure, 23 is a dustproof cap. Furthermore, the water supply tube 3 is located on the bottom side of the water storage tank 10.
Connecting pipe 22 that becomes the water intake port 21 to be connected to
is provided so as to protrude from inside the water storage tank 10 to the outside. The lower end 22a of this connecting pipe 22 is located close to the bottom of the water storage tank 10 so that all the water in the water storage tank can be consumed. The ceramic cup 40 is tapered so that it can be easily inserted into the soil, and the proximal opening of the hollow cup portion 41 made of unglazed porous ceramic is opened separately for a water introduction passage 43 leading to a water introduction port 42 and an air vent 44. The conduit 43 is connected to the plastic base 45, and one end of the conduit 43 is opened into the knob 41, and the air vent 44 is provided with a check valve 20'. The water inlet 42 of the ceramic cup 40 and the water intake 21 of the water storage tank 10
and are connected by a transparent and flexible water supply tube 30.

Next, the operation of the above automatic irrigation device will be explained. First, water is supplied from the water inlet 12 of the water storage tank 10. The supplied water flows through the water injection pipe 14 to the water injection part 15.
flow inward. The water surface is the lower end 14 of the injection pipe 14
When a is closed, the water storage section 15 becomes sealed, and the air within the water storage section 15 becomes pressurized. At this time, the pressurized air floats the elastic valve plate 1 from the air vent passage 13 provided in the ceiling part 11 and escapes to the outside, so that the inside of the water storage part 15 is always maintained at atmospheric pressure. Therefore, even if the lower end 14a of the water injection pipe 14 is blocked, the water level in the water storage section 15 rises to the water level in the water injection pipe 14, and the water storage section 15 becomes full of water. Then, when the ceramic cup 40 is lowered to a position lower than the water storage tank 10 and the water supply tube 30 and the ceramic cup 40 are filled with water, negative pressure is applied to the air vent passage 13 due to the lowering of the water level in the water storage section 15. The elastic valve plate 17 of the check valve 20 is attracted, and the air vent passage 13 is closed.
Further, when the cup portion 41 of the ceramic cup 40 filled with water is inserted into the soil in the flower pot H and water is supplied from the cup portion 41 by utilizing the absorbency of the soil, the water supply power is used to fill the water storage tank 10. water is supplied through the water supply pipe 30.
The change in the water level in the water storage tank 10 is caused by the fact that the water level in the water injection pipe 14 falls, and this water level reaches the lower end 14.
When reaching point a, the water storage section 15 starts from this descent 14a.
Air enters inside, and the elastic valve plate 17 of the check valve 20 remains attracted.

In addition, in the embodiment, the elastic valve plate 1 is used as the check valve 20.
Although we used an in-line type check valve using 7, the present invention is not limited to this, and check valves with a truncated conical or spherical valve body pressed by a spring may also be used. In some cases. In short, any valve may be used as long as the valve body prevents backflow due to the back pressure of the fluid. Further, the water storage tank does not necessarily have to be independent.
For example, forming a water storage part as a double structure with a flower pot,
A water inlet, water pipe, check valve, and water intake are installed in this.

〔effect〕

As explained above, according to the automatic irrigation device according to this invention, by providing a check valve in the air vent passage provided at the top of the water storage tank, the air vent passage can be opened and closed without any manual operation. Water can be supplied to the water storage tank, and water can also be supplied from the water supply pipe according to the water absorption power through the ceramic cup. In particular, it completely eliminates the short-term leakage of water in the water storage tank due to forgetting to close the air vent passage, which occurred in the past, and achieves a stable water supply over a long period of time according to the water absorption state of the soil, providing peace of mind. An automatic irrigation device that can be used to automatically water plants can be provided.

[Brief explanation of the drawing]

The drawing is a sectional view showing one embodiment of the automatic irrigation device according to the invention. 10...Water storage tank, 11...Ceiling part, 12...
...Water inlet, 13...Air vent passage, 14...Water injection pipe, 15...Water storage section, 16...Valve chamber, 17...
...Elastic valve plate, 18...Vent hole, 19...Cap, 20, 20'...Check valve, 21...Water intake,
30...Water supply tube, 40...Ceramic cup, 42...Water inlet.

Claims (1)

[Scope of utility model registration request] The ceiling is equipped with a water inlet to which a water injection pipe that hangs down into the water storage area is connected, and an air vent passageway for discharging the air in the water storage area. Automatic irrigation comprising: a porous ceramic cup that is inserted into the water tank; and a flexible water supply tube, one end of which is connected to the water intake of the water storage tank, and the other end of which is connected to the water inlet of the ceramic cup. An automatic irrigation device characterized in that the air vent passage is provided with a check valve that prevents air from entering the water storage tank from outside.