JPS585486Y2 - Automatic water supply control device - Google Patents

Description

[Detailed explanation of the invention] This invention is... In order to automatically supply drained water or liquid fertilizer to soil for cultivating plants such as rice cultivation, hydroponics, potted plants, etc. or water tanks at regular intervals for a certain period of time, the water supply part This invention relates to an automatic water supply control device that controls water supply.

Conventionally, this type of automatic water supply control device decelerates the high-speed rotation of a motor using gears, etc., and transmits it to the shaft of a disc equipped with a protrusion (cam) to rotate at a low speed, and the cam opens and closes mechanical contacts such as micro switches. By doing so, a square wave signal was output and the water supply pump or solenoid valve was operated directly to supply water.

However, with this conventional device, in order to control the water supply interval, it was necessary to change the rotational speed of the motor or the reduction ratio of gears, etc., and in order to control the water supply time, it was necessary to change the shape of the cam.

For this reason, there was a drawback that the water supply time could not be easily changed.

Also, when the water supply time is very short compared to the water supply interval, for example, when the water supply interval is 24 hours and the water supply time is 60 seconds (time rate 0.07%), it is very difficult to operate accurately. This was difficult and the amount of water supplied was highly variable, which had a negative impact on plant growth, often causing the plants to dry out or become submerged in water, causing their roots to become weak and die.

The present invention eliminates the above-mentioned drawbacks of the prior art by transmitting the output of the reference signal generator to a timer via a frequency divider and accurately controlling the water supply section using the output of the timer.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the example, the water supply interval was 24 hours, and the water supply time was 60 seconds.

1 is an automatic water supply control device of the present invention, 2 is a reference signal generator such as a crystal oscillator, astable multi-by-break or blocking oscillator, and 3 is a separator composed of a flip-flop or the like.

A reference output signal T1 of IHz is obtained by a reference signal generator 2, and this signal is added to a frequency divider 3 with a frequency of 86400 to obtain a frequency of 24.
A frequency divided output signal T2 of a time rectangular wave is obtained.

By adding the output of the frequency divider 3 to the timer 4, which uses a monostable multivibrator and CR differentiation circuit that operates for 60 seconds at the falling edge, the operation output signal T3 of the timer with a period of 24 hours and an operation time of 60 seconds is obtained. can get.

By applying this signal to the drive circuit 5 that amplifies the current and operating the water supply section 6 such as a pump or solenoid valve with its output, water or liquid fertilizer is supplied to the water supply device 7 such as a potted plant for cultivating potted plants or an aquarium. Water is supplied from the water supply tank 8 for 60 seconds once every 24 hours.

If you use Timer 4 that operates at the rising edge,
The water supply time is different from the one that operates on the falling edge, but the water supply interval is the same.

The device of the present invention can adjust the water supply interval t2 by changing the frequency of the reference signal generator 2 or the frequency division ratio of the frequency divider 3, and can adjust the water supply interval t1 by changing the operating time of the timer 4. can be adjusted.

The water supply time t1 does not change by adjusting the water supply interval t2, and the water supply interval t2 does not change by adjusting the water supply time t1, and unlike a disc equipped with a cam, each can be adjusted independently.

Furthermore, there is an excellent effect that accurate operation can be achieved even when the water supply time t1 is very short, for example, 30 seconds, compared to the water supply interval t2.

Considering the accuracy and durability of the device of the present invention, the amount of water required by plants, the amount of evaporation, etc., the optimum watering time is 30 seconds to 5 minutes, and the watering interval is 1 to 10 days.

With the device of the present invention, by setting the water supply amount required by the plants in advance using the water supply time t and the water supply interval t2 and pressing the button, it is possible to cultivate and manage a large amount of plants with only a small amount of effort, especially indoors. The industrial value of the device is significant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the automatic water supply control device of the present invention, and is for explaining the principle of water supply. FIG. 2 is a diagram of various output signals. 2... Reference signal generator, 3... Frequency divider, 4... Timer, 5... Pump, T1... Reference output signal, T2
...Frequency division output signal, T3...Timer output signal, t
l...Water supply time, t2...Water supply interval.

Claims (1)

[Claims for Utility Model Registration] (1) A configuration consisting of a reference signal generator, a frequency divider, and a timer with a built-in drive circuit that amplifies the current, and the water supply interval is determined by the cycle of the divided output signal of the frequency divider. An automatic water supply control device characterized in that the water supply time is controlled by an operation output signal of a timer. C(2) The automatic water supply control device according to claim 1, wherein the timer utilizes a monostable multivibrator and a CR differential circuit. (3) The automatic water supply control device according to claim 1 or 2, wherein the reference signal generator is a crystal oscillator, an astable multivibrator, or a blocking oscillator.