JPH02132587A - Controller for automatic vending machine - Google Patents

Abstract

PURPOSE:To reduce the maximum input current of an automatic vending machine by the current consumption of its illuminating circuit and to set the maximum input current within a prescribed rated current value by lighting the illuminating circuit with a secondary battery when a load having large current consumption is turned on. CONSTITUTION:When a load 21 is under an OFF state, a charging circuit 25 is turned on by a control relay 27, a secondary battery 24 is charged, and an illuminating circuit 28 is lighted by using a commercial power source with a control relay 29. Next, when the load 21 is turned on by a control relay 22 according to control by a control means 23, the charging circuit 25 is turned off by the control relay 27, the charging to the secondary battery 24 is stopped, and the power source of the illuminating circuit 28 is switched from the commercial power source to the output voltage of an inverter 26 by a third control relay 29. Thus, when the load having large capacity is under an ON state, the illuminating circuit 28 is lighted by the secondary battery 24, and the maximum input current of the automatic vending machine is reduced for the current consumption of the illuminating circuit 28.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a vending machine, and more particularly to a control device that suppresses maximum current usage.

[Prior Art] As an outlet for supplying power to a vending machine, one having a rated current of 15 A is generally used.

For example, if the allowable current is set to a rating of 20A, which is one rank higher, it will require a different type of outlet and thicker wiring than those commonly used, and furthermore, it will require strengthening the power supply equipment or changing the contract type. This is because the installation location of the vending machine is severely restricted.

Therefore, in vending machines equipped with heaters and compressors that consume large currents, such as vending machines that sell hot and cold drinks, priority is given to the startup conditions of both loads so that the maximum current usage does not exceed 5A per month. and set
Both loads are controlled so that they do not start at the same time.

[Problems to be Solved by the Invention] However, recent vending machines have become larger with diversification of functions, and many lights have been used in the lighting board section. Therefore, current consumption for lighting increases, and even if the above-described control method is employed, it is becoming difficult to suppress the maximum current usage to within 15 A.

As a solution to this problem, as shown in FIG.
When it is about to exceed the maximum capacity, the control device 52 controls the phase control device 53 to increase the flow to the large-capacity heater 5l. ! ! A possible method is to suppress the current to within 15A.

However, this method of reducing the heating capacity of the heater 5l has a problem in that it leads to a decrease in the vending capacity of cup vending machines and the like.

This invention was made to eliminate the above-mentioned problems, and an object thereof is to provide a control device for a vending machine that can suppress the maximum current usage within a predetermined value without reducing sales capacity. shall be.

[Means for Solving the Problems] A control device for a vending machine according to a first aspect of the present invention is a vending machine having a load 2l such as a heating and cooling device that consumes a large amount of current. a control relay 22 and a first control relay 2 based on the detected heating temperature or cooling temperature;
2, and a rechargeable secondary battery 2.
4, a charging circuit 25 for charging the secondary battery 24, and a secondary battery 24.
an inverter device 26 that converts the DC voltage of the current source into an AC toov; a second control relay 27 that opens and closes the charging circuit 25; and a third control relay 29 for switching, so that when the load 2l is on, the charging circuit 25 is turned off and the output voltage of the inverter device 26 is applied to the lighting circuit 28.
and a third control relay 27,29 are controlled.

A control device for a vending machine according to a second invention is a vending machine having a load 3L that consumes a large amount of current, such as a heating and cooling device, and includes a first control relay 32 that opens and closes the load 3L, and a heating temperature that is detected. or the lth control relay 3 based on the cooling temperature.
2, and a rechargeable secondary battery 3 that can be charged and discharged.
4, an inverter device 36 that lights up the lighting circuit 35 with DC voltage from the secondary battery 34 or the control means 33, and a second control relay 37 that charges the secondary battery 34 with the DC voltage from the control means 33. A third control relay 38 is provided as an input to the inverter device 36 to switch the DC voltage from the secondary battery 34 or the control means 33, and when the load 3l is on, charging of the secondary battery 34 is turned off. In addition, the second and third control relays 37 and 38 are controlled so that the DC voltage of the secondary battery 34 is applied to the inverter device 36.

[Operation According to the first invention, as shown in FIG. 1, when the load 2l is off, the charging circuit 25 connects the second control relay 27
The secondary battery 24 is charged, and the lighting circuit 28 is turned on by the commercial power supply by the third control relay 29. Next, when the load 2l is turned on by the first control relay 22 under the control of the control means 23, the charging circuit 2 is turned on by the second control relay 27.
5 is turned off, charging of the secondary battery 24 is stopped, and the third control relay 29 switches the power source of the lighting circuit 28 from the commercial power source to the output voltage of the inverter device 26 . In this way, when a large capacity load is on, the lighting circuit 28 is connected to the secondary battery 2 through the inverter device 26.
4, the maximum human power current of the vending machine is reduced by the current consumption of the lighting circuit 28.

According to the second invention, as shown in FIG. 2, when the load 31 is off, the lighting circuit 35 is turned on by the control voltage of the control means 33, for example, a direct current, via the inverter device 36. The secondary battery 34 is charged by the control voltage. On the other hand, when the load 31 is turned on, charging of the secondary battery 34 is stopped and the secondary battery 34 is
The lighting circuit 35 is turned on via the inverter device 36 with a DC voltage of Reduced.

[Embodiment] FIG. 3 is a block diagram showing an embodiment of the control device of the present invention.

1 is a CPU (central processing unit) that centrally controls this device.
2 is R that stores the CPUI control program.
It is OM (read only memory). 3 is RA
M (Random Access Memory), which stores various data necessary for controlling the CPUI as needed. 4 is an input/output section, and each device described below is connected to the CPtJ1 via this input/output section 4.

5 is a heater that heats the water stored in the tank to a predetermined temperature, and 6 is a fluorescent lamp circuit for illumination. 7 is
It is a rechargeable and dischargeable secondary battery, 8 is a charging circuit that charges the secondary battery 7, and 9 is an inverter device that converts the DC voltage on the secondary battery 7 into AC toov. X1
~X, are control relays, and control relays XI and X3
controls the charging circuit 8 and the heater 5 on/off by the respective relay contacts x1 and K, and the control relays X,
switches the power supply to the fluorescent lamp circuit 6 from the commercial power source to the output of the inverter device 9 through the relay contact X. IO is a driver that drives control relays x1 to X. 11 is a temperature sensor that detects the temperature of hot water in the tank, and a signal detected by this temperature sensor 11 is inputted to an input/output terminal 4 via an A/D converter 2.

The control operation of the apparatus having the above configuration will be explained based on the flowchart of FIG. 4 and the time chart of FIG. 5.

In the above device, the current consumption of the heater 5 is 11A,
It is assumed that the current consumption of the fluorescent lamp circuit 6 is 3A, the steady current consumption of the device is 3A, and the current consumption of the charging circuit 8 is X(A).

First, when the power is turned on to the vending machine, step S1
Each data is initialized and the product goes into a sales standby state. When the heater 5 is off in this sales standby state, the fluorescent lamp circuit 6 is turned on by the commercial power source, as will be explained later.
Further, the secondary battery 7 is charged by a charging circuit 8.

Now, at a predetermined timing, the temperature sensor I1 detects the temperature of the hot water in the tank in step S2.
In step S3, it is determined whether the hot water has dropped to a predetermined temperature at which the heater 5 should be turned on. If the hot water has not decreased to the above temperature, the process proceeds to step S6, but if the hot water has decreased to the temperature at which the heater 5 should be turned on,
Proceeding to step S4, the power supply to the fluorescent lamp circuit 6 is switched from the commercial power source to the secondary battery 7 via the inverter device 9 under the control of the control relay X, and the heater 5 is turned on in step S5. .

In the next step S6, it is determined whether or not the hot water has risen to a predetermined temperature at which the heater 5 should be turned off by energizing the heater 5. If the hot water has not reached the predetermined temperature, the process returns to the previous step and the heater 5 is continuously energized; however, if the hot water rises to the predetermined temperature, the process advances from step S6 to step S7, and the heater 5 is turned off. The control relay X is de-energized, and in step S8
By controlling t, the power supply to the fluorescent lamp circuit 6 is switched from the secondary battery 7 to the original commercial power source. Then, in step S9, the charging circuit 8 is turned on under the control of the control relay X, the secondary battery 7 is charged, and the original sales standby state is returned.

FIG. 5 shows the current consumption of each device described above. Until the heater 5 is turned on (time 1), the input current of the vending machine is the steady current consumption of 3 A and the fluorescent lamp circuit 6. The sum of the consumption current 3A and the input current X(A) to the charging circuit 8 is e+x(A). Since the vending machine is lit by the battery 7, the human power current of the vending machine is 14 A in total, which is the current consumption of the heater 5 of 11 A and the steady current consumption of 3 A, and is suppressed within the above-mentioned 15 A value.

In the above vending machine, the control circuit voltage is set to 24V, for example.
If the fluorescent lamp circuit 6 is an inverter type that lights with 24 V DC, and the secondary battery 7 is 24 V, power can be saved by eliminating the need for a ballast in the fluorescent lamp circuit 6, and therefore,
Capacity of secondary battery can be reduced. Further, since the secondary battery 7 can be directly charged with the control voltage, the charging circuit 8 is not particularly required.

In the above embodiment, a heater is used as an example of a large-capacity load, but the control device of the present invention can also be applied to a compressor, which is a cooling device, or a vending machine equipped with both a heater and a compressor.

[Effects of the Invention] As explained above, in this invention, when a load with large current consumption is turned on, the lighting circuit is turned on using a secondary battery, so that the lighting circuit automatically lights up by the amount of current consumed by the lighting circuit. The maximum human power current of the vending machine can be reduced and can be kept within a predetermined rated current value.

[Brief explanation of the drawing]

1 and 2 are diagrams corresponding to claims of the control voltage device for a vending machine of the present invention, FIG. 3 is a control block diagram showing an embodiment of the present invention, and FIG. 4 is a diagram of the control voltage device of the vending machine of the present invention. FIG. 5 is a flowchart showing the control operation, FIG. 5 is a time chart showing the control operation of the device in FIG. 3, and FIG. 6 is a control block diagram showing the control method in a conventional vending machine. l...CPU, 2...ROM, 3...RAM, 4
...input/output section, 5.. converter, 6.. fluorescent lamp circuit,
7... Secondary battery,... Charging circuit, 9... Inverter device, 10... Driver 11... Temperature sensor, l2... A/D converter, x1-X,... Control relay Figure 1 Patent applicant Fuji Electric Co., Ltd. Agent Patent attorney Aoyama Aoyama Figure 5 Heater (1.1KW-11A) Figure 2 t1. td2. ．． /,. ．． t2 Figure 3 Figure

Claims (2)

[Claims] (1) In a vending machine that has a load that consumes a large amount of current, such as a heating or cooling device, a first control relay that opens and closes the load, and a control that controls the first control relay based on the detected heating temperature or cooling temperature. means, a rechargeable and dischargeable secondary battery, a charging circuit that charges the secondary battery, an inverter device that converts DC voltage from the secondary battery to AC 100V, and a second control relay that opens and closes the charging circuit. , a third control relay that switches the voltage of the commercial power supply or the output voltage of the inverter device as a power supply to the lighting circuit, and when the load is on, the charging circuit is turned off and the output of the inverter device is turned off. A control device for a vending machine, characterized in that the second and third control relays are controlled so that a voltage is applied to the lighting circuit. (2) In a vending machine with a load that consumes a large amount of current, such as a heating or cooling device, a first control relay that opens and closes the load, and a control that controls the first control relay based on the detected heating temperature or cooling temperature. means, a rechargeable secondary battery, an inverter device for lighting the lighting circuit with DC voltage from the secondary battery or the control means, and a second battery for charging the secondary battery with the DC voltage from the control means.
a third control relay that switches the DC voltage from the secondary battery or the control means as an input to the inverter device;
and the second and third control relays are controlled so that when the load is on, charging of the secondary battery is turned off and the DC voltage of the secondary battery is applied to the inverter device. Features of vending machine control device.