JP3125617B2 - Vending machine water supply control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply control device for a vending machine (hereinafter referred to as a vending machine) using an electromagnetic valve as a water supply valve.

[0002]

2. Description of the Related Art Conventionally, in a vending machine water supply control device, an electromagnetic water supply valve is installed between a water supply and a vending machine, and water is supplied by a water supply request signal from a water level detection switch provided in a water storage device (water reservoir) in the vending machine. The valve was opened and closed to supply water. In this case, regardless of whether or not tap water is actually supplied, while the water level in the reservoir is below the set value and there is a water supply request from the water level detection switch, energize the coil for operating the water supply valve. When the water level returned to the set value and there was no water supply request, the power supply was stopped and the water supply valve was closed.

[0003]

However, the conventional water supply control device has the following problems. That is, when the water level of the reservoir falls even when the water supply is cut off, the energization is started as described above, and the coil continues to be energized and the water supply valve remains open until the water cutoff is restored and the water level returns to the specified value.

[0004] On the other hand, if the coil of the water supply valve is energized continuously for a long time, the life of the coil may be shortened due to heat generation of the coil.
Further, there is a case where the operation sound at the time of energization is anxious. An object of the present invention is to provide a water supply control device for a vending machine that controls the operation of a water supply valve depending on the presence or absence of tap water and prevents unnecessary power supply.

[0005]

A water supply control device for a vending machine according to a first aspect of the present invention is a vending machine for supplying tap water to a water reservoir by opening and closing a water supply valve, wherein a water supply request is made when the water level of the water reservoir is below a predetermined value. Water supply requesting means, water presence / absence detection means for detecting tap water interruption, energization means for energizing a water supply valve when there is a water supply request, and energization means while water interruption is detected by the water presence / absence detection means. And a control unit that does not issue an energization command.

A water supply control device for a vending machine according to a second aspect of the present invention is a vending machine for supplying tap water to a water reservoir by opening and closing a water supply valve, wherein the water supply request means for requesting water supply when the water level of the water reservoir is equal to or lower than a predetermined value; Water presence / absence detection means for detecting water supply interruption, energization means for energizing the electromagnetic water supply valve when there is a water supply request, and water interruption by the water existence detection means when a predetermined time has passed continuously from the time of the water supply request. A control unit that does not issue an energization command to the energization unit when the detection is performed.

[0007]

According to the first aspect of the present invention, even if the water supply request is made by the water supply requesting means and the energizing means tries to energize the water supply valve, the control section keeps supplying the energizing means while the water presence / absence detecting means detects the interruption of water supply. Since no energization command is issued, unnecessary energization is prevented. According to the second aspect, even if the water supply request is made by the water supply requesting means and the energizing means energizes the water supply valve,
When the water cutoff is detected by the water presence / absence detecting means when a predetermined time has passed continuously from the time when the water supply request was issued, the power supply command is not issued to the power supply means. As in the first aspect, the power supply is stopped, and when the water supply is restored within the above-mentioned predetermined time, the water supply is continued, so that unnecessary power supply is prevented.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a water supply control unit. Reference numeral 2 denotes a water storage device (water reservoir) for storing water, and tap water is supplied through a water supply valve 1. This water supply request is for float 12
This is performed by detecting a drop in the water level by the high water level switch 3 that operates via the switch. Reference numeral 6 denotes a water presence / absence detecting means such as a sensor for detecting the presence / absence of tap water supply (water interruption). Reference numeral 5 denotes a water supply control unit for controlling this device, the details of which are shown in FIG. The low water level switch 4 is a switch for detecting a minimum water level required for sales.

In FIG. 2, reference numeral 9 denotes a CP for controlling the entire apparatus.
U is connected to a ROM 11 for storing control programs and the like and a RAM 10 for storing data and the like. Also,
The CPU 9 is connected to the water presence / absence detecting means 6, the water supply valve relay 7, and the low water level switch 4 via the I / O 8. The water supply valve relay 7 is normally used to temporarily stop the operation of the water supply valve when the water reservoir 2 is washed, but in the present invention, the water supply valve relay 7 is used to stop the energization of the solenoid valve.

Next, this control operation will be described with reference to FIGS. When the water level of the water reservoir 2 drops, the water supply control unit 5 receives a water supply request signal from the high water level switch 3 via the float 12, energizes the coil of the water supply valve 1, turns on the water supply valve 1, and recovers the water level. Turn off. In this case, in Invention 1, the water supply control unit 5 receives the signal indicating that there is no water from the water presence / absence detection unit 6 so that the water supply valve 1 does not turn on when there is no water.
Turning on the water supply valve relay 7 prevents the coil of the water supply valve 1 from being energized. With this control, the coil of the water supply valve 1 is not energized when tap water is not supplied even when the water level is lowered and there is a water supply request.

Further, in the invention 2, when the water supply control unit 5 receives the water absence signal from the water presence / absence detection means 6, and when there is no water even when a predetermined time has elapsed since the water supply request signal was received. Turns off the water supply valve in the same manner as described above so that no electricity is supplied. The above control can prevent unnecessary continuous energization of the water supply valve when water is cut off. FIG. 3 is a timing chart showing a typical example of the operation of each device described above. The operation described above is shown as follows.

According to the first aspect of the invention, even when there is a water supply request by the high water level switch (periods A, B, and C in FIG. 3), the water supply valve relay operates when the water presence / absence detecting means cuts off the water (D, E). (F, G) and the energization of the water supply valve is interrupted (H,
I). According to the second aspect of the present invention, after a predetermined time Ts (K) from the water supply request time point (J), the water supply valve is energized and water is supplied if the interruption of water supply is restored. Stopped, no water supply.

[0013]

According to the first aspect of the present invention, even if there is a water supply request by the water supply requesting means, the control unit stops the supply of water to the water supply valve during the water cutoff detection. Sound generation can be limited. According to the second aspect of the present invention, even if there is a water supply request by the water supply requesting means, when the interruption of the water supply is detected after a lapse of a predetermined time from the time of the water supply request, the energization of the water supply valve is stopped. Unnecessary energization can be prevented in the same manner as in 1, and when the water supply is restored within the above-mentioned predetermined time, the water supply can be continued.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram showing an embodiment of a water supply control device for a vending machine according to the present invention.

FIG. 2 is a configuration diagram showing a water supply control unit of the water supply control device for a vending machine according to the present invention.

FIG. 3 is a diagram showing a timing chart of an operation based on the present invention;

[Explanation of symbols]

1: Water supply valve, 2: Water reservoir, 3: High water level switch, 4
... Low water level switch, 5 ... Water supply control unit, 6 ... Water presence / absence detection means, 7 ... Water supply valve relay, 8 ... I / O, 9 ... CPU, 10
... RAM, 11 ... ROM, 12 ... Float.

Claims (2)

(57) [Claims] A vending machine for supplying tap water to a water reservoir by opening and closing a water supply valve, a water supply requesting means for requesting water supply when a water level of the water reservoir is equal to or lower than a predetermined value, and a water detecting means for detecting interruption of tap water. A presence / absence detection means, an energization means for energizing the water supply valve when there is a water supply request, and a control unit which does not issue an energization instruction to the energization means while water interruption is detected by the water presence / absence detection means. A water supply control device for a vending machine. 2. A vending machine for supplying tap water to a water reservoir by opening and closing a water supply valve, a water supply requesting means for requesting water supply when a water level of the water reservoir is equal to or lower than a predetermined value, and a water detecting means for detecting tap water cutoff. Presence / absence detection means, energization means for energizing the electromagnetic water valve when there is a water supply request, and water supply detection means when the water presence / absence detection means continuously detects a predetermined time from when the water supply request was made, to the energization means. A water supply control device for a vending machine, comprising: