JPS5927630B2 - automatic watering device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a watering device that automatically controls watering of plants in gardens, indoor cultivation, and lawns of golf courses, etc., without relying on human hands.

Conventionally, water sprinkling is performed by turning on and off a switch directly from a location away from a water faucet, for example, in a control room of a building. Therefore, it is necessary to perform watering twice, and then to stop the watering, and there are restrictions during the watering time, and there are also problems with watering on holidays, especially in companies, public facilities, etc.

In addition, there are devices that install a humidity sensor on the watering surface and use the humidity sensor to detect the need for watering and sprinkle water for a certain period of time. However, since this was done each time the humidity sensor detected a need for watering, watering could be started unexpectedly, which could cause confusion in parks and other areas. The present invention has been made in view of the above-mentioned points. Specifically, the necessity of watering is detected by a humidity sensor installed on the watering surface, and a control current is applied to the control circuit to control the water supply pipe. The valve is actuated, and this starts watering and stops watering after a certain period of time.Also, it issues a warning before starting watering, and even if watering is in progress, it will stop immediately if a rain event approaches. death,
The purpose is also to control the watering time depending on the season. The present invention will be explained below based on drawings showing one embodiment of the present invention. 1 is a humidity sensor;
It is installed on the watering surface H of soil, cultivation mat, etc.

As shown in FIG. 3, this humidity sensor 1 has an insulating plate 2
Two meandering electrode plates 3 are provided in the electrode plate 3, and as the humidity increases, the insulation resistance on the insulating plate 2 decreases, and the electrode plates 3 are electrically short-circuited and conductive. Alternatively, if the humidity is low, the insulation resistance becomes infinitely large and electrically disconnected, or conductor rods 4 and 5 as shown in FIG. 1 may be inserted. C is a control circuit which includes the humidity sensor 1 and has the following configuration. That is, the lines 6a, 6 of the power source 5
A humidity sensor 1 provided with upper and lower resistors Tl8 is connected between b, and for these upper and lower resistors 7 and 8 and the humidity sensor 1,
The resistor 9, the collector and emitter of the transistor 10, and the starting relay 11 are connected in parallel, and the resistor 12 is connected between the base b of the transistor 10, the upper resistor 7, and the sensor 1.
are connected via. Therefore, when the humidity is high, electrical conduction occurs between the electrode plates 3 of the sensor 1, so the current flows from the power supply 5 to the one line 6a, the upper resistor 7, the sensor 1, the lower resistor 8, and the other power line 6b. As a result, the collector and emitter of the transistor 10 become non-conductive, and no current flows to the starting relay 11. Furthermore, when the humidity is low, there is no electrical continuity between the electrode plates 3 of the humidity sensor 1, so current flows from the power supply 5 to the one line 6a, the upper resistor 7, the resistor 12, and the base b of the transistor 10. 10 becomes conductive between the collector and emitter, and current flows through the starting relay 11. In other words, the control circuit C is an inverting circuit that does not allow current to flow through the starting relay 11 when the sensor 1 is in a conductive state. Also, a transistor 10 and a starting relay 11
An alarm device 13 is connected to the other line 6b between the two, and when the humidity becomes low and conduction occurs between the collector and emitter of the transistor 10, current flows through this and issues an alarm. emanate. Since this notification device 13 is a warning before watering, it may be a bell, a lamp, a buzzer, or even a sound broadcast. A starting timer 14 is connected together with the relay contact 11a of the starting relay 11 between the lines 6a and 6b.

The normally open contact 14a of this starting timer 14 is connected together with the stopping relay 15 between the lines 6a and 6b. 16 is a stop timer, and the relay contact 15a of the stop relay 15
It is also connected between the lines 6a and 6b.

Also, the normally closed contact 16a (1) of this stop timer 16 is inserted between the stop relay 15 and the normally open contact 14a of the start timer 14, and the normally closed contact 15b of this stop relay 15 is connected to the transistor 10. emitter and starting relay 1
It is inserted between 1 and 1. 17 is a valve relay,
Normally open contact 14a of starting timer 14 and stopping timer 16
between normally closed contact 16a and contact 1 of stop relay 15
5a and the stop timer 16, and the other line 6
connected to b.

Therefore, the stop relay 15, the stop timer 16, and the valve relay 17 are mutually connected to the normally open contact 14 of the start timer 14.
a and the contact 15a of the stop relay 15 are burnt, creating a parallel relationship. 18 is a clock switch set for 24 hours, for example 1
Set the time of day for watering, as it is necessary to change the watering time depending on the season.

Reference numeral 19 denotes a light beam type automatic blinking switch, which continues watering for a certain period of time, and if it rains during watering, it immediately operates in the darkness of the surrounding area and cuts off the control circuit C.

20 is a manual switch, 21 is a water supply pipe, 22 is a water tap, and 23 is a valve.

Next, the operation of the automatic watering device of the present invention will be explained. First, let us describe the case where the watering surface H contains sufficient moisture. In this state, the humidity is high, and therefore the humidity sensor 1 has a low insulation resistance and is in a conductive state. be.

In this case, the humidity sensor 1 is turned on and the power supply 5 is turned on in FIG.
, one line 6a, upper resistor 7, sensor 1, lower resistor 8,
On the other hand, current flows through the line 6b. This is because it is smaller than the resistance passing through the upper resistor 7, resistor 12, transistor 10, and starting relay 11. Therefore, the starting relay 11 does not turn on, the valve 23 does not open, and there is no water sprinkling. Subsequently, when the water on the water sprinkling surface H disappears, the humidity becomes low, and therefore the humidity sensor 1 has a high insulation resistance and becomes non-conductive.

In this case, the humidity sensor 1 is turned off as shown in FIG. 2, and the power supply 5, one line 6a, the upper resistor 7, the resistor 12, the base b1 of the transistor 10, the normally closed contact 15b of the stop relay 15
1 starting relay 11 and the transistor 10 is triggered to flow from the resistor 9.

As a result, the contact 11a of the starting relay 11 is turned on, and the starting timer 14 starts operating.

In this case, the notification device 13 issues a warning in advance at the same time. The starting timer 14 supplements this warning time. When the normally open contact 14a of the starting timer 14 is turned on, one track 6a, the normally closed contact 16a of the stop timer 16, and the stop relay 15
, and the other line 6b.

As a result, the normally open contact 14a, the valve relay 17,
The water also flows through the other line 6b, and the valve 23 is opened to perform water sprinkling.

Since the contact 15a of the stop relay 15 is also connected and a circuit with the valve relay 17 is formed, even if the humidity sensor 1 is in the state before watering due to water sprinkling, that is, the humidity is high and the insulation resistance is lowered. Starting relay 11, starting timer 14
stop relay 15 or stop timer 1 even if they return respectively.
Continue watering as long as 6 does not operate.

A stop timer 16 sets this watering time.

The normally closed contact of the timer 16 is opened by the operation of the stop timer 16, and the stop relay 15 is also operated and the relay contact 15a is turned off. Of course, since the starting timer 14 has already completed its operation, the normally open contact 14a is open, and everything depends on the existence of the relay contact 15a of the stop relay 15. For example, in the summer, it is desirable to sprinkle water in the morning and evening, and in the winter, it is desirable to sprinkle water in the afternoon, so the time switch 18 is set 24 hours a day.

Furthermore, since the water sprinkling continues for a certain period of time, once water is sprinkled, it will continue even during rain.This can be done quickly by using the light beam type automatic flashing switch 19, since it will become cloudy as rain approaches.

The present invention (as described above, the humidity sensor 1 installed on the watering surface detects the necessary range of watering, and this causes a control current to flow through the control circuit to control the valve 23 of the water supply pipe 21.
Since the device is driven to sprinkle water and also to stop watering after a certain period of time, it is possible to automatically sprinkle water according to the dryness of the surface to be sprinkled without relying on human hands.

Furthermore, the present invention issues a warning before watering using a bell, buzzer, lamp, announcement, etc., thereby avoiding confusion when watering is suddenly performed in a park, for example.

Furthermore, in the present invention, there is a possibility that the calibration environment of the humidity sensor 1 causes the sensor 1 to return to its normal state immediately after the start of watering. Since the water sprinkling is continued, on the other hand, there is a situation where the water sprinkling is continued even when it is raining, and the light beam type automatic flashing switch 19 detects rain from cloudy weather and immediately stops the water sprinkling.

[Brief explanation of the drawing]

The drawings show one embodiment of the automatic watering device of the present invention, in which Fig. 1 is a schematic diagram, Fig. 2 is a circuit diagram, Fig. 3 is a perspective view of parts, and Fig. 4 is a schematic diagram.
The figure is a usage example diagram. 1... Humidity sensor, C... Control circuit,
5...Power supply, 6a, 6b...Line, 7
, 8, 9, 12...Resistor, 10...Transistor, 11...Starting relay, 13...
...Notification device, 14...Start timer, 1
5...Stop relay 16...Stop timer, 17...Valve relay, 18...
...Time switch, 19...Light automatic flashing switch, 21...Pipe, 22...
Water faucet, 23... Valve, H... Water spray surface.

Claims (1)

[Claims] 1. A humidity sensor that is installed on the watering surface and detects the humidity below a certain value on the watering surface, and is connected to the control circuit together with this humidity sensor and is activated by the control current that flows into the control circuit upon detection by the humidity sensor. A relay for a valve that operates, a valve for a water supply pipe that is driven by the operation of this relay, and a water supply pipe that is activated by the operation of this valve.After a certain period of time has elapsed after water is sprayed from a water faucet, the current flowing in the control circuit is cut off, and the relay and In an automatic watering system comprising a stop timer for returning the valve, a starting timer for operating the valve relay after a predetermined time has elapsed after the control current starts flowing, and a warning for watering in advance while the control current is flowing. An automatic watering device characterized by being provided with a notification device that provides notification.