JP2702879B2 - Vending machine 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 vending machine for cooling and selling commodities, and more particularly to a control device for a vending machine for performing defrosting.

[0002]

2. Description of the Related Art In recent years, a control device for a vending machine has been disclosed in Japanese Utility Model Publication No. 56-94480.

Hereinafter, an example of a vending machine control device will be described with reference to the drawings.

In FIGS. 6 and 7, reference numerals 1 and 2 denote power supply lines,
3 is a refrigerator, 4 is an evaporator that evaporates the refrigerant sent from the refrigerator and cools the inside of the main body 5, 6 is a cool air blower fan motor that circulates the air cooled by the evaporator into the main body storage, 7 Is a product shelf in the main body 5 for storing a product 8, which is locked by a spiral and carried out by a sales signal (not shown).
Operates and is sold out. 9 is a defrost timer device,
The timer switch 10 is closed for a predetermined time. The C contact of the timer switch 10 is connected to the coil 11a of the defrost control relay 11 and the b contact of the switch 11b. The defrost control relay 11 is connected to a contact b of a switch 11b of the coil 11a. Reference numeral 12 denotes a defrost relay, which includes a coil 12a, a switch 12b, and a switch 1.
2c. The coil 12a is connected to a return thermo switch 13 for detecting the temperature of the evaporator 4. Reference numeral 14 denotes a defrost heater for the evaporator 4 which is energized through a contact c of a switch 12b of the defrost relay 12.

The operation of the control device for a vending machine configured as described above will be described below with reference to FIGS.

When the defrost timer 9 starts after a predetermined time has passed and the defrost timer 9 is activated, the defrost relay 10 is excited by closing the power line 1, the contact c of the switch 10, the coil 12 a, and the power line 2. Accordingly, the defrost heater 14 is energized through the c-contact of the switch 12c of the defrost relay 12, and the refrigerator 3 and the cool air blower motor 6 stop operating and start defrosting. Then, if the operation of the defrost timer 9 is stopped thereafter, it returns to the original state. If the contact point of the return thermo switch 13 is released during the defrosting, the energization of the defrosting relay 12 is cut off to terminate the defrosting.

[0007]

However, in the above configuration, since the operation time of the defrost timer 9 is constant regardless of the temperature inside the main body, the contact of the return thermoswitch 13 may be welded. At the time of failure, the temperature inside the main body abnormally rises due to the defrosting time being too long, which makes the parts unsafe due to deformation or ignition of the parts. Missed.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides an automatic defrosting apparatus that forcibly stops defrosting in accordance with the temperature inside the main body during defrosting. A control device for a vending machine is provided.

[0009]

According to the present invention, there is provided a vending machine control apparatus comprising: a merchandise shelf provided in a main body for cooling and storing commodities; and an evaporator for cooling the main body. , a refrigerator for supplying refrigerant to the evaporator, and defrosting heater provided in the evaporator, a cold air blowing fan motor, a first temperature detecting means for detecting the temperature in the body, of the evaporator Second temperature detection means provided in the vicinity,
A timer for counting the current elapsed time of the energization start time and the defrosting heater to defrost heater, the timer
Input the time data from the
Signal from the temperature detection means to detect the end of defrosting
An arithmetic processing unit, and a signal from the arithmetic processing unit
Control means to start and stop energizing the defrost heater
And at the start of defrosting, the arithmetic processing unit controls the control unit.
And start energizing the defrost heater via
Stop supplying power to the refrigerator and cool air blower motor
And at the end of defrosting, the arithmetic processing unit
When the power supply to the defrost heater is stopped through the means
Power supply to the refrigerator and the cool air fan motor
In the vending machine control device for starting
The management department has a first allowable time and a time longer than this first allowable time.
The second allowable time is set in advance, and during the defrosting, the main body is
If the temperature inside the chamber is higher than a preset temperature,
The elapsed time of energization of the frost heater is equal to the first allowable time of energization.
If the temperature is longer, the defrost is forcibly terminated and the
When the temperature is lower than a preset temperature, the defrost heater
When the elapsed time of energization is longer than the second allowable time of energization
Then, the defrost is forcibly terminated .

Further, those having a setting device for arbitrarily setting the energizing time allowed temperature and defrosting heater for stopping the energization of defrosting heater.

The arithmetic processing unit has an allowable temperature inside the main body.
And the defrost heater re-energization temperature are set,
When the temperature in the main body is equal to or higher than the allowable temperature,
If it is determined that there is, the power to the defrost heater is temporarily turned off.
And the temperature in the main body is restarted
If it is determined that the temperature has dropped below the
Is to be restarted .

Also , the allowable temperature in the main body and the defrosting heater
There is provided setting means for arbitrarily setting the power supply restart temperature .

A product shelf provided in the main body for cooling and storing the product; an evaporator for cooling the main body; a refrigerator for supplying a refrigerant to the evaporator; and a defrost heater provided for the evaporator. , A cool air blower fan motor, a first temperature detecting means for detecting the temperature inside the main body, a dehumidification switch for dehumidifying the inside of the main body, and an operation of the dehumidification switch to the defrost heater and the cool air blower fan motor. Start energization, stop the refrigerator, compare the temperature inside the main body detected by the first temperature detecting means with a pre-programmed temperature, and stop energizing the defrost heater and the cool air blower fan motor. And a control unit for controlling the operation of the defrost heater, the cool air blower fan motor, and the refrigerator by a signal from the calculation processing unit. It includes those were.

[0014]

According to the present invention, the temperature inside the main body detected by the first temperature detecting means having the above-described configuration is compared with a temperature programmed in advance, and the power supply to the defrost heater is forcibly stopped by a timer. An arithmetic processing unit that compares the counted time with a previously programmed counting time of the timer, and a control unit that controls the energization of the defrost heater by a signal from the arithmetic processing unit. In order to vary the operation stop time of the defrost heater according to the temperature of the defrost heater, even when the defrost end detecting means fails, parts such as the evaporator heat insulating plate near the defrost heater are deformed or ignited by overheating. In addition, since the temperature inside the main body is not abnormally increased, the sales can be continued.

Further, a first temperature detecting means for detecting the temperature inside the main body, a defrost heater, a timer for counting an energizing time of the defrost heater, a temperature for stopping the energization of the defrost heater and a defrost Since the setting means for arbitrarily setting the energization time of the heater is provided, it is possible to appropriately perform the operation stop control of the defrost heater in accordance with the humidity environment.

Also, a product shelf provided in the main body for cooling and storing the product, an evaporator for cooling the inside of the main body, a refrigerator for supplying a refrigerant to the evaporator, and a defrost heater provided for the evaporator. A cool air blower fan motor, a first temperature detecting means for detecting the temperature in the main body, a second temperature detecting means provided near the evaporator, and a time to start energizing the defrost heater. A timer for counting, an arithmetic processing unit for comparing the temperature detected by the first temperature detecting means with a pre-programmed temperature, and temporarily turning on the defrost heater when the temperature exceeds the pre-programmed temperature. Control to control the operation of the defrost heater by a signal from the processing unit that stops the defrost heater when the temperature falls below another pre-programmed temperature. Since the temperature of the main body exceeds a predetermined temperature during the defrosting operation, the defrosting operation is temporarily stopped, so that the deterioration of the product due to an increase in the temperature inside the main body is prevented. Can be.

Further, the apparatus includes first temperature detecting means for detecting the temperature in the main body, a defrosting heater, and setting means for arbitrarily setting the power supply stop and restart temperatures of the defrosting heater. It is possible to set an appropriate defrost operation stop temperature.

A product shelf provided in the main body for cooling and storing the product, an evaporator for cooling the main body, a refrigerator for supplying a refrigerant to the evaporator, and a defrost heater provided for the evaporator. , A cool air blower fan motor, a first temperature detecting means for detecting the temperature inside the main body, a dehumidification switch for dehumidifying the inside of the main body, and an operation of the dehumidification switch to the defrost heater and the cool air blower fan motor. Start energization, stop the refrigerator, compare the temperature inside the main body detected by the first temperature detecting means with a pre-programmed temperature, and stop energizing the defrost heater and the cool air blower fan motor. An arithmetic processing unit for controlling the operation of the defrost heater, the cool air blower fan motor and the refrigerator by a signal from the arithmetic processing unit. It is possible to dry the dew arrived in the component during maintenance, dew by which to restart the machine to freeze the parts, it is possible to prevent troubles.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a control device for a vending machine according to a first embodiment of the present invention will be described with reference to the drawings.

FIGS. 1, 2 and 3 show a vending machine control device according to a first embodiment of the present invention, and a description of the same configuration as that of the conventional example will be omitted.

Reference numeral 15 denotes first temperature detecting means for detecting the temperature of the air in the main body 5, and reference numeral 16 denotes second temperature detecting means disposed near the evaporator 4. Reference numeral 17 denotes a timer for counting the time at which power is supplied to the defrost heater and the time of power supply to the defrost heater. Reference numeral 18 denotes the first temperature detecting means, the defrost heater 14, and power supply to the defrost heater 14. The timer 17 for counting time, the temperature at which the energization of the defrost heater 14 is stopped, and the temperature of the defrost heater 14
This is a setting means for arbitrarily setting the energization time of. Comparing the temperature in the main body detected by the first temperature detecting means with a pre-programmed temperature (A1, A2, B1);
Further, the timer counts the time counted for forcibly stopping the energization of the defrost heater by the timer by setting the counting time of the timer to a pre-programmed time (C1, D1, D1).
An arithmetic processing unit 20 for comparison with D2) is a control means for controlling the energization of the defrost heater, the operation of the refrigerator 3 and the cool air blower fan motor 6 based on a signal from the arithmetic processing unit. The control means 20 includes a first relay 22 for turning on and off a first contact 21 connected in series to the refrigerator 3 and a second contact 23 connected in series to the cool air blower fan motor 6. And a third relay 26 for turning on and off a third contact 25 connected in series to the defrost heater 14.
And control.

The operation of the control device for a vending machine configured as described above will be described with reference to FIGS.

In STEP1, the setting means 18 controls the operation of the refrigerator by the first temperature detecting means 15, and sets the temperatures ta before the defrost heater 14 is de-energized to A1, A2, B1, and B2. The energization start time hc of the defrost heater 14 and the energization stop time hd of the heater are C1,
D1 and D2 are set.

At STEP 2, the time hc of the timer 6 is set.
It is determined whether or not hc = C1 is detected with respect to the set time C1. If hc = C1 is not set, the cool air blowing fan motor 6 is turned on and the defrost heater 14 is turned off in STEP3.

STEP 4 is the first temperature detecting means 1.
The temperature ta detected in step 5 is compared with the set temperature A1 by ta.
If = A1, the refrigerator 3 is turned off in STEP5, and t
If a = A1, the refrigerator 3 is turned on in STEP6.
Then, it is turned off at ta = A2.

If hc = C1 in STEP2, STE
At step P7, the timer 17 starts counting, and at step 8, the refrigerator 3 and the cool air blower fan motor 6 are turned off.
Then, the defrost heater 14 is turned on.

Next, in STEP 9, the temperature ta of the first temperature detecting means 15 is compared with the set temperature B1, and the time hd counted by the timer 17 is compared with the set time D1, and ta>
= B1, hd = D1, go to the above STEP3, otherwise, in STEP10, ta <b1, hd = D
If it is 2, go to the above STEP3, otherwise, STE
Return to P8.

As described above, according to the present embodiment, the temperature in the main body 5 detected by the first temperature detecting means 15 is compared with a temperature B1 programmed in advance, and the timer 17 is used to remove the temperature. The arithmetic processing unit 19, which compares the time counted for forcibly stopping the energization of the frost heater 14 with the previously programmed counting time of the timer 17, and a signal from the arithmetic processing unit 19,
The control means 2 for controlling the energization of the defrost heater 14
By providing 0, the operation stop time of the defrost heater 14 is changed according to the temperature inside the main body 5,
Even when the second temperature detecting means 16 fails, components such as the evaporator heat insulating plate near the defrost heater 14 are not deformed or ignited by overheating, and the temperature inside the main body is abnormally increased. You can sell without missing a chance to sell.

Next, a control device for a vending machine according to a second embodiment of the present invention will be described with reference to FIG.

In STEP 1, the setting means 18 controls the operation of the refrigerator by the first temperature detecting means 15 and sets the temperatures ta before the power supply to the defrost heater 14 is stopped to A1, B2, B3, The energization start time hc of the defrost heater 14 and the energization stop time hd of the heater are C1,
The temperature te of the second temperature detecting means 16 is set to E1.

At STEP 2, the time hc of the timer 6 is set.
It is determined whether or not hc = C1 is detected with respect to the set time C1. If hc = C1 is not set, the cool air blowing fan motor 6 is turned on and the defrost heater 14 is turned off in STEP3.

STEP 4 is the first temperature detecting means 1.
The temperature ta detected in step 5 is compared with the set temperature A1 by ta.
If = A1, the refrigerator 3 is turned off in STEP5, and t
If a = A1, the refrigerator 3 is turned on in STEP6.
Then, it is turned off at ta = A2.

If hc = C1 in STEP2, ST
In EP7, the refrigerator 3 and the cool air blower motor 6
Is turned off, and the defrost heater 14 is turned on.

Next, in step 8, the temperature ta of the first temperature detecting means 15 is compared with the set temperature B2, and ta> = B
If not 2, go to STEP7, if so, ST
In EP9, the refrigerator 3 is turned on, the cool air blower fan motor 6 is turned on, and the defrost heater 14 is turned on.
F.

Next, in step 10, the temperature ta of the first temperature detecting means 15 is compared with the set temperature B3, and ta <=
If it is not B3, go to the above STEP 9;
In step 11, the refrigerator 3 is turned off, the cool air blower motor 6 is turned off, and the defrost heater 1 is turned off.
4 is turned ON.

Next, in STEP 12, the temperature te of the second temperature detecting means 16 is compared with the set temperature E1, and te = E
If it is not 1, go to the above STEP11.
Go to TEP3.

As described above, according to the present embodiment, the arithmetic processing section 19 for comparing the temperature detected by the first temperature detecting means 15 with the previously programmed temperatures A1, B2, B3, When the temperature exceeds the preset temperature B2, the energization of the defrost heater 14 is temporarily stopped, and when the temperature falls below another preprogrammed temperature B3, the energization of the defrost heater 14 is restarted. Since the control unit 20 controls the operation of the defrost heater 14 based on a signal from the arithmetic processing unit 19, the defrost operation is performed when the temperature in the main body 5 exceeds a predetermined temperature during the defrost operation. Is temporarily stopped, so that the deterioration of the product due to the rise in the temperature in the main body 5 can be prevented.

Next, a control device for a vending machine according to a third embodiment of the present invention will be described with reference to FIGS.

Reference numeral 27 denotes a dehumidification switch for performing dehumidification cleaning in the main body 5. The operation of the vending machine control device configured as described above will be described with reference to FIG.

In STEP 1, the setting means 18 controls the operation of the refrigerator by the first temperature detecting means 15, and the temperature ta before the energization of the cool air blower fan motor 6 and the defrost heater 14 is stopped. Are set to A1 and B4.

In STEP 2, when the dehumidification switch 27 is closed, in STEP 7, the cool air blower fan motor 6 is turned on, the defrost heater 14 is turned on, and the refrigerator 3 is turned off.

STEP 8 is the first temperature detecting means 15.
Is greater than the set temperature B4 by ta>
If = B4, in step 9, the refrigerator 3 is turned on, the cool air blower motor 6 is turned on, and the defrost heater 14 is turned off.

STEP 6 is the first temperature detecting means 1.
The temperature ta detected in step 5 is compared with the set temperature A1 by ta.
If = A1, the refrigerator 3 is turned off in STEP7, and t
If a = A1, the refrigerator 3 is turned on in STEP8.
Then, it is turned off at ta = A2.

As described above, according to the present embodiment, the dehumidification switch 27 for dehumidifying the inside of the main body 5 and the operation of the dehumidification switch 27 start energizing the defrost heater 14 and the cool air blowing fan motor 6. Then, the refrigerator 3 is stopped, and the temperature inside the main body 5 detected by the first temperature detecting means 15 is compared with a pre-programmed temperature, and the defrost heater 14 and the cool air blower motor 6 are energized. And the control means 20 for controlling the operation of the defrost heater 14, the cool air blower fan motor 6, and the refrigerator 3 by a signal from the calculation processing unit 19, It is possible to dry the dew that has reached the parts during maintenance of the machine,
Dew freezes parts after restarting the machine,
Trouble can be prevented.

[0045]

As described above, according to the present invention, the temperature in the main body detected by the first temperature detecting means is compared with a pre-programmed temperature, and the timer is used to turn on the defrost heater. The arithmetic processing unit for comparing the time counted for forcibly stopping with a previously programmed counting time of the timer, and the control for controlling the energization of the defrost heater by a signal from the arithmetic processing unit By having the means, in order to vary the operation stop time of the defrost heater according to the temperature in the main body,
Even at the time of failure of the second temperature detecting means, parts such as the evaporator heat insulating plate near the defrost heater are not deformed or ignited by overheating, and the temperature inside the main body is abnormally increased. Because there is no, you can sell without missing the opportunity to sell.

The arithmetic processing unit for comparing the temperature detected by the first temperature detecting means with a pre-programmed temperature, and energizing the defrost heater temporarily when the temperature exceeds the pre-programmed temperature. Control means for controlling the operation of the defrost heater in response to a signal from the arithmetic processing unit to stop the operation, and to restart the energization of the defrost heater when the temperature falls below another pre-programmed temperature. Since the defrosting operation is temporarily stopped when the temperature in the main body exceeds a predetermined temperature during the defrosting operation, it is possible to prevent the deterioration of the product due to the rise in the temperature in the main body. it can.

The dehumidification switch for dehumidifying the inside of the main body, and the operation of the dehumidification switch starts energization of the defrost heater and the cool air blower motor, stops the refrigerator and stops the first temperature detection. Comparing the temperature in the body detected by the means with a pre-programmed temperature,
The defrosting heater and the arithmetic processing unit that stops energization of the cool air blower fan motor, and a signal from the arithmetic processing unit, which controls the operation of the defrost heater, the cool air blower fan motor, and the refrigerator. Because of the control means, it is possible to dry the dew that has arrived at the parts during maintenance of the machine, and it is possible to prevent the dew from freezing the parts due to the restart of the machine.

[Brief description of the drawings]

FIG. 1 is a system diagram of a vending machine control device according to first, second and third embodiments of the present invention.

FIG. 2 is a block diagram of a vending machine control device according to first, second and third embodiments of the present invention;

FIG. 3 is a flowchart of a first embodiment of the present invention.

FIG. 4 is a flowchart of a second embodiment of the present invention.

FIG. 5 is a flowchart of a third embodiment of the present invention.

FIG. 6 is an electric circuit diagram of a conventional vending machine control device.

FIG. 7 is a system diagram of a conventional vending machine control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 Refrigerator 4 Evaporator 5 Main body 6 Cold air blower fan motor 7 Merchandise shelf 8 Merchandise 14 Defrosting heater 15 First temperature detecting means 16 Second temperature detecting means 17 Timer 18 Setting means 19 Arithmetic processing unit 20 Control means 27 Dehumidification switch

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-271680 (JP, A) JP-A-4-217763 (JP, A) Jpn.

Claims (5)

(57) [Claims] 1. A product shelf provided in a main body for cooling and storing a product, an evaporator for cooling the main body, a refrigerator for supplying a refrigerant to the evaporator, and a defrost heater provided for the evaporator. When the first temperature detection means for detecting, cold air blowing fan motor, the temperature in the body, setting the vicinity of the evaporator
A second temperature sensing means digits, energization of the defrost heater
A timer that counts a start time and an elapsed time of energization of the defrost heater, and inputs time data from the timer.
To determine the start of defrosting, and a signal from the second temperature detecting means.
And an arithmetic processing unit for detecting the end of defrosting by inputting
The power to the defrost heater is turned off by a signal from the processing unit.
Control means for starting and stopping, and when defrosting is started,
An arithmetic processing unit configured to control the defrost heater through the control unit;
To the refrigerator and the cool air blower.
When energizing the fan motor is stopped and defrosting is completed,
The arithmetic processing unit controls the defrost heat through the control unit.
The power to the heater and the refrigerator
Control of vending machines that start energizing the blower fan motor
In the control device, the arithmetic processing unit has a first allowable time.
And a second allowable time longer than the first allowable time
Set, during defrosting, the temperature in the main body is set in advance
When the temperature is equal to or higher than the temperature, the energization elapsed time of the defrost heater
Force defrost when is longer than the first allowable time
And the temperature in the main body becomes lower than a preset temperature.
When it is low, the elapsed time of energization of the defrost heater is the second
Forcibly terminates the defrost if it is longer than
A control system for an automatic vending machine that. 2. A defrost control system for an automatic vending machine according to claim 1, further comprising setting means for arbitrarily setting the energizing time allowed temperature and defrosting heater for stopping the energization of the heater. 3. An arithmetic processing unit includes an allowable temperature in the main body and a filter.
The frost heater energization restart temperature is set, and
The temperature in the main body is equal to or higher than the allowable temperature
Is temporarily turned off, the power to the defrost heater is temporarily turned off.
Stopping, and the temperature in the main body is the energization restart temperature
If it is determined that the temperature is below
The control device for a vending machine according to claim 1 or 2, wherein the electric power is restarted . 4. Allowable temperature in the main body and energization of the defrost heater
4. A setting means for arbitrarily setting a restart temperature.
A vending machine control device as described. 5. A product shelf provided in a main body for cooling and storing products, an evaporator for cooling the main body, a refrigerator for supplying a refrigerant to the evaporator, and a defrost heater provided for the evaporator. A cool air blower fan motor, a temperature detecting means for detecting a temperature in the main body, a dehumidification switch for dehumidifying the inside of the main body, and an operation of the dehumidification switch to energize the defrost heater and the cool air blower fan motor. Start, stop the refrigerator, compare the temperature in the main body detected by the temperature detecting means with a pre-programmed temperature, and stop the energization of the defrost heater and the cool air blower fan motor, and an arithmetic processing unit. A vending machine control device comprising control means for controlling the operation of the defrost heater, the cool air blower fan motor, and the refrigerator by a signal from the arithmetic processing unit.