JPS62121892A - Automatic pump - Google Patents

Abstract

PURPOSE:To eliminate useless power consumption by stopping with a predetermined time interval through a timer when the driving time of a motor is frequent while stopping through a pressure switch when it is not frequent. CONSTITUTION:The starting times of a motor 4 is counted by means of a counting circuit 11 then compared with a setting count signal S4. When a count signal S3 is larger than the setting count signal S4, a timer operating signal S5 is provided to stop the motor 4 through a timer with a predetermined time interval, while when it is smaller, the motor 4 is stopped through a high pressure detection signal S1 of a pressure switch. Consequently, the duty factor of the pump motor will drop to reduce the power consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is based on a pressure switch provided on the discharge side of the pump body, and a system that operates based on a high pressure detection signal from the pressure switch and stops the pump motor after a delay time. It concerns a timer circuit that generates a signal and a complete automatic pump.

(Conventional technology) In the conventional automatic pump described in Japanese Patent Application Laid-open No. 48-55401, which precedes the present invention, a pump main body (1) is provided as shown in FIG. The impeller (3) housed in the casing 121 of the pump motor (4
) to suck water from the suction side (5), and as shown in Fig. 5, a pressure switch (7) and a small capacity pipe are connected to the discharge side pipe line (6) of the pump main body (1). a pressure tank (8), and a pressure switch (7) and a timer (not shown) that operates when the pressure switch detects high pressure.
The power supply to the pump body (11 pump motor (4) is controlled by the above operation method is as shown in Fig. 6. is operated continuously, and when the amount of water used becomes smaller than Qt, the discharge pressure P is detected and the timer is activated to start on/off operation, as shown in Figures 7 and 8. It is repeatedly operated with an on time of Tt and an off time of T2.

However, in this type of conventional automatic pump, due to the timer operation, even when the water usage is small as shown in Figure 7, the pump motor (1) with the same T + waiting time as when the water usage is large as shown in Figure 8 is used. The disadvantage was that the power was wasted.

E→ Problems to be Solved by the Invention The present invention solves the above-mentioned drawbacks, and when the amount of water used is small, it reduces the power consumption rate to the pump motor in response to the amount of water used, thereby reducing wasted power consumption. It eliminates the

B) Means for solving the problem The present invention includes a pressure switch provided on the discharge side of the pump body, and a system that operates based on a high pressure detection signal of the pressure switch and generates a stop signal for the pump motor after a delay time. a timer circuit, a counting circuit that counts the number of times the pump motor is activated within a predetermined time when the timer circuit is activated, and a counting signal of the counting circuit and a set counting signal that is set, and the counting signal value is set. a comparison circuit that generates a timer operation signal when the value is greater than the count signal value, and based on the output of the comparison circuit, when the timer operation signal is generated, at the time when the stop signal is generated,
It may also include a motor drive circuit that intermittently stops the pump motor at the time when the high pressure detection signal is generated when the high pressure detection signal is not generated.

(E) Effect According to the present invention, when the amount of water used is relatively large, the number of times the pump motor is started increases, and the count value of the counting circuit is also greater than the set count value. A signal is generated and the pump motor is stopped at predetermined time intervals by a timer so that the pump motor is not turned on and off as frequently as with a pressure switch.

In addition, when the amount of water used is relatively small, the number of times the pump motor is started is reduced, and the count value of the counting circuit is also less than the set count value; The pump motor is stopped in a relatively short time due to the high pressure detection No. 1B of the pressure switch, and therefore the energization time rate of the pump motor is reduced and power consumption is reduced.

(f) Embodiment Next, an embodiment of the present invention will be explained with reference to its main parts. Other parts not particularly described are constructed in the same manner as in the conventional example.

In Fig. 1, (9) is a drive device that drives a pump motor (41) based on the output of the pressure switch (7), etc., and is configured by a microcomputer, etc.
71 detects a high voltage of value P as shown in FIG. 2 and generates a high voltage detection signal (S,).
, ) outputs a stop signal (S, ) for the pump motor (4) after a predetermined delay time. (Ill is a word count circuit that counts the number of activations of the pump motor f41 within a predetermined time (TS) when the timer circuit 001 is activated (during the delay time) as shown in FIG. 6. When the opening degree is small, the off time (T,) of the pump motor (4) is long and the number of activations υ is reduced.When the opening degree of the back pressure faucet is relatively large, the off time (T, ) is short. Therefore, the number of activations increases.

a? is a comparator circuit that compares the count signal (S,) of the counting circuit (old) with the set count signal (S4), and the value of the count signal (S,) is greater than the value of the set count signal (S,). It is configured to output a timer operation signal (S11) when the dog is a dog. 0 is a motor drive circuit, which is configured to drive the pump motor (41) by a drive start signal (S6) from the pressure switch (7) when the discharge side pressure becomes below P1, as shown in FIG. When the timer operation signal (S, ) is generated from the comparator circuit 0z, the motor drive circuit 3 operates at the time when the stop signal (S,) of the timer circuit port α is generated, and when the timer operation signal (S, ) is not generated, the motor drive circuit The pump motor (4) is configured to be stopped intermittently when the high pressure detection signal (Sl) is generated.

ni In the automatic pump, as shown in FIG. 2, when the amount of water used is greater than Q2, the pump motor (41) is continuously operated.

If the amount of water used decreases from Q2, the pressure P.

The timer circuit ασ is activated based on the high pressure detection signal (81) of the pump motor (41), and the pump motor (41) is stopped at predetermined time intervals and operated intermittently.
) is stopped by the timer circuit α■ rather than by the pressure switch (7), which is frequently turned on and off, so that the pump motor (41) is not turned on and off frequently.

Furthermore, when the amount of water used decreases by more than Q, the number of times the pump motor (4) is activated decreases in accordance with the amount of water used,
The value of the counting signal (S3) of the counting circuit αI) is also smaller than the value of the set counting signal (S4), and the timer operation icon number (S,
) is stopped, and therefore, the pump sensor (4) is intermittently stopped when the high pressure detection signal (S, ) of the pressure switch (7) is generated. Therefore, the pump motor (41) stops in a shorter time than when using the timer circuit αα, reducing the energization time rate (T, /(TI+Tt)) and saving writing power consumption.

(G) Effects of the Invention Since the present invention is constructed as described above, when the amount of water used is relatively large, the pump motor is controlled by a timer circuit to prevent the pump motor from turning on and off frequently. It can be prevented. In addition, when the amount of water used is relatively small, the pump motor is switched on when the pressure switch detects high pressure.
By intermittent turning off, the energization time rate of the pump motor can be reduced in accordance with the small amount of water, and therefore the power consumption of the pump motor can be reduced.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of a pump motor drive device according to an embodiment of the present invention, Fig. 2 is a pumping characteristic diagram of the embodiment, Fig. 6 is an explanatory diagram of a counting circuit of the embodiment, and Figs. @Figure 8 shows a conventional example, Figure 4 is a sectional view of the pump main body, Figure WJ5 is a waterway diagram, Figure 6 is a pumping characteristic diagram, Figure 7 is an explanatory diagram of operation when the amount of water used is small, Figure 8 The figure is an explanatory diagram of the operation when the amount of water used is large. (11... Pump body, (4)... Pump motor, (7)... Pressure switch, αα... Timer circuit, U... Counting circuit, α?... Comparison circuit, α3 ...
Motor drive circuit, (TS')...predetermined time, (S,
)...High pressure detection signal, (S2)...Stop signal, (S
, )... Counting signal, (S4)... Setting counting signal, (
S, )...Timer operation signal.

Claims (1)

[Claims] 1) A pressure switch provided on the discharge side of the pump body, a timer circuit that operates based on a high pressure detection signal of the pressure switch and generates a stop signal for the pump motor after a delay time, and the timer. When the circuit is activated, a counting circuit counts the number of times the pump motor is started within a predetermined time, and the counting signal of the counting circuit is compared with the set counting signal, and if the counting signal value is larger than the set counting signal value, a comparison circuit that generates a timer operation signal when the timer operation signal is generated based on the output of the comparison circuit;
An automatic pump further comprising: a motor drive circuit that intermittently stops the pump motor at the time when the high pressure detection signal is generated when the high pressure detection signal is not generated.