JP2000322644A - Automatic vending machine fan motor controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the load of a microcomputer in a cooling/heating control part and to decrease the number of wiring from a control board. SOLUTION: Microcomputers 5 having communication functions are provided inside respective plural fan motors 1-4 arranged inside the cabinet of an automatic vending machine. Then, these microcomputers 5 control the operation of the respective fan motors 1-4 by receiving the instruction of rotation speed, forward/backward rotation and ON/OFF through communication from a microcomputer 6 composing of a control part partially charging the control of the fan motors 1-4 in the automatic vending machine. Besides, the microcomputers 5 in the respective fan motors can detect the conditions in the respective fan motors 1-4 and can inform the microcomputer 6 of these conditions as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vending machine fan motor control device for controlling the operation of a fan motor for circulating cool air or warm air in a storage of a product storage column of a vending machine.

[0002]

2. Description of the Related Art FIG. 2 is a circuit diagram of a conventional vending machine fan motor control device. In FIG. 2, 11 to 14 are fan motors, 15 is a motor control IC, 16 is a microcomputer, and 17 is a control board.

The microcomputer 16 constitutes a cooling / heating control unit for controlling a cooling unit, a heater for heating, a fan motor and the like in the vending machine. Fan motors 11 to 14
Are provided in a plurality of compartments partitioned in the vending machine. Each of the fan motors 11 to 14 includes a motor control IC 15 therein, and based on a control signal sent from the microcomputer 16, the motor control IC 15 controls the operation of the fan motor while switching the current of the motor coil.

The driving voltage of each of the fan motors 11 to 14 is 2
4V, the on / off of the transistors Tr11 to Tr14
Do. The motor control IC 15 of each of the fan motors 11 to 14 is always supplied with 8 V DC power.
The fan motors 11 to 14 output a rotation pulse FG proportional to the number of rotations of the motor, and the microcomputer 16 turns on / off the transistors Tr11 to Tr14 based on the rotation pulse FG and performs PWM (pulse width modulation) control. Control is performed so that the rotation speeds of the fan motors 11 to 14 become a predetermined value. Further, when the forward / reverse rotation signal ROT is set to H (high), the motor rotates forward, and when it is set to L (low), the motor rotates reversely.

[0005]

However, in the above-described conventional vending machine fan motor control device, the microcomputer 16 of the cooling and heating control unit always calculates the rotation pulse FG from each of the fan motors 11 to 14 and calculates each of the transistors Tr11. ~ T
There is a problem that it is necessary to perform on / off control of r14, and the computational load is too large. The number of wires connected to each of the fan motors 11 to 14 is five, and the number of wires from the control board 17 on which the microcomputer 16 is mounted is one.
There was also a problem that the number of wires became four and the wiring became complicated.

SUMMARY OF THE INVENTION It is an object of the present invention to solve such a problem and to reduce the load on the microcomputer of the cooling / heating control unit and to reduce the number of wires from the control board.

[0007]

According to one aspect of the present invention, there is provided a vending machine fan motor control apparatus for controlling a plurality of fan motors arranged in a vending machine. Machine fan motor control device,
A microcomputer with a communication function is provided in each fan motor,
These microcomputers are characterized in that the vending machine receives an instruction through communication from a control unit that controls the fan motor and controls the operation of each fan motor. By doing so, the load on the microcomputer of the cooling / heating control unit can be reduced, and the number of wires from the control board can be reduced.

According to a second aspect of the present invention, in the vending machine fan motor control device, the control unit instructs the microcomputer in each fan motor to perform the rotation speed in multiple stages, thereby controlling each fan motor. It is characterized in that the rotational speed can be controlled in multiple stages. By doing so, the air volume of the fan can be adjusted in multiple stages, and the interior of the refrigerator can be maintained in an optimal state.

According to a third aspect of the present invention, there is provided a vending machine fan motor control device, wherein a microcomputer in each fan motor detects a state in each fan motor and notifies the control unit. Features. In this way, more advanced functions can be developed.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit diagram of a vending machine fan motor control device of the present invention. In FIG. 1, reference numerals 1 to 4 denote fan motors, which are provided in a plurality of compartments partitioned in a vending machine. Reference numeral 5 denotes a microcomputer for individually controlling the fan motor 1. Although not shown, similar microcomputers are provided for the fan motors 2 to 4. Reference numeral 6 denotes a terminal control unit in the vending machine control device, which is a microcomputer constituting a cooling / heating control unit for controlling a cooling unit, a heater for heating, a fan motor, and the like;
Is a control board on which the microcomputer 6 is mounted.

The microcomputer 5 of each fan motor controls the operation of the fan motor by switching on / off the transistors Tr1, Tr2, Tr3 based on the control signal SIG sent from the microcomputer 6 of the cooling / heating control section.
The drive voltage of each of the fan motors 1 to 4 is 24 V and is supplied from the control board 7. The microcomputer 5 of each of the fan motors 1 to 4 is always supplied with 5 V DC power.

The microcomputer 6 of the cooling / heating control section includes a communication line S
It communicates with the microcomputer 5 mounted on each of the fan motors 1 to 4 using the IG and CONT, and transmits commands such as a designated number of revolutions, forward / reverse rotation, and on / off. Each fan motor 1-4
The microcomputer 5 mounted thereon receives the instruction and executes it. The designated rotation speed can be changed in multiple stages so that the air volume of the fan can be adjusted in multiple stages. Further, it detects the internal temperatures of the fan motors 1 to 4, the motor current, the number of rotations of the motor, and the like, and notifies the microcomputer 6 of the detection. The microcomputer 6 enables more advanced functions such as failure detection of the fan motors 1 to 4.

As described above, by mounting the microcomputer 5 on each of the fan motors 1 to 4, complicated control of the number of revolutions of the motor and the like are performed by the individual microcomputers, and the microcomputer 6 of the cooling / heating control unit is
It is only necessary to notify the execution instruction using the communication line, and the computation load is greatly reduced. Further, all the wirings are five parallel wirings, so that the number of wirings from the control board 7 on which the microcomputer 6 is mounted becomes only five, and the number of wirings can be reduced.

[0014]

Since the present invention is configured as described above, it has the following effects. That is, the vending machine fan motor control device according to claim 1 is provided with a microcomputer having a communication function in each fan motor, and these microcomputers are controlled by a control unit that shares control of the fan motor in the vending machine. The operation of each fan motor is controlled in response to an instruction through communication. As a result, the load on the microcomputer of the cooling / heating control unit can be reduced, and the number of wires from the control board can be reduced.

According to a second aspect of the present invention, in the vending machine fan motor control device, the control unit instructs the microcomputer in each fan motor to perform the rotation speed in multiple stages, thereby controlling each fan motor. Since the rotation speed can be controlled in multiple stages, the air volume of the fan can be adjusted in multiple stages, and the interior of the refrigerator can be maintained in an optimal state.

In the vending machine fan motor control device according to the third aspect of the present invention, the microcomputer in each fan motor detects a state in each fan motor and notifies the control unit. More advanced functions can be deployed.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a vending machine fan motor control device of the present invention.

FIG. 2 is a circuit diagram of a conventional vending machine fan motor control device.

[Explanation of symbols]

 1-4: fan motor 7: control board 11-14: fan motor 15: motor control IC

Claims (3)

[Claims] 1. A vending machine fan motor control device for controlling a plurality of fan motors disposed in a vending machine cabinet, wherein a microcomputer having a communication function is provided in each fan motor, and the microcomputers are provided with: A vending machine fan motor control device for controlling operation of each fan motor in response to an instruction by communication from a control unit that controls the fan motor in the vending machine. 2. The control unit instructs a microcomputer in each fan motor to control the number of rotations in multiple stages,
2. The vending machine fan motor control device according to claim 1, wherein the number of rotations of each fan motor can be controlled in multiple stages. 3. The vending machine fan motor according to claim 1, wherein a microcomputer in each fan motor detects a state in each fan motor and notifies the control unit. Control device.