JP3026386B2 - vending machine - 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, and more particularly to a vending machine.
Comprise accommodates 蓄 cooling agent or thermal storage agent relates vending machine so as to adjust the internal temperature.

[0002]

2. Description of the Related Art In a vending machine capable of cooling and heating the inside of a refrigerator, a refrigerant is circulated with compression and expansion and heat exchange is performed to cool or heat the refrigerator.
Further, there is also a type in which a heater is used in combination for heating. In order to prevent the inside of the refrigerator from being affected by the outside air temperature, a carry-out door is attached to the product take-out opening so that the product opens and closes automatically in accordance with the sales operation of the product.

[0003]

However, in the above-mentioned vending machine, a large amount of power is consumed for cooling or heating all day, so that power saving is required.

[0004] It is an object of the present invention to provide a vending machine that can use electric power effectively by using midnight electric power.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a carry-out door which is attached to a product take-out port and which automatically opens and closes in accordance with a product selling operation, to cool the inside of a refrigerator or In vending machines that enable heating,
Adjacent to the wall of the refrigerator having a heat source reservoir portion containing at least one of 蓄 cold agent or thermal storage agent, cooling the 蓄 cooling agent or
A cooling means or heating means for heating the thermal storage agent, along with operating the cooling means or heating means to the midnight time zone, the internal temperature be in a storage room cooling control is below a predetermined lower limit temperature And a control device for controlling the opening of the carry-out door when the internal temperature rises to or above a predetermined upper limit temperature during the internal heating control.

[0006]

According to the present invention, to fall midnight time zone cooling means or heating means 蓄 cooling agent operates is cooled or thermal storage agent is warmed. And, such as during the day, when the temperature in the refrigerator has dropped below the lower limit temperature during the cooling control in the refrigerator, or when the temperature in the refrigerator has risen to the predetermined upper limit temperature or more during the heating control in the refrigerator, temporarily The carry-out door is opened, outside air flows into the storage, and the temperature shifts to each of the limit temperatures.

[0007]

FIG. 1 is a control circuit diagram of a vending machine showing one embodiment of the present invention, and FIG. 2 is a sectional view of a main part of the vending machine shown in FIG.

Referring to FIG. 2, reference numeral 1 denotes a product storage, which is surrounded by a wall 2 made of a heat insulating material and has a column 3 for storing therein products such as cans. Reference numeral 4 denotes a delivery shooter for taking out sold products, and reference numeral 5 denotes a product takeout port for taking out the carried products. Reference numeral 6 denotes a carry-out door for preventing outside air inflow, and 7 denotes a door drive motor for driving the carry-out door 6 to open and close. The carry-out door 6 is always closed, and is temporarily opened at a timing when goods are sold and carried out. I have to. A machine room 8 is provided with a cooling / heating device 9 including a compressor and the like.

[0009] 10 蓄 cooling agent, 11 denotes a thermal storage agent is housed encased in a suitable container, respectively the heat source reservoir 12 provided between the wall 2 and column 5. 13A is a heat exchange pipe of the indoor heat exchanger 13 to be described later, is Maki裝on the outer periphery of 蓄 cold agent 10 and 蓄 <br/> thermal agent 11, the refrigerant cooled by the cooling and warming device 9 is circulated the 蓄 cold agent 10 is cooled cold 蓄 <br/> or thermal storage agent 11 warmed and so as to heated 蓄. 14A is a heating wire of the heater 14 to be described later, is Maki裝the outer periphery of the thermal storage agent 11, as the electric thermal storage agent 11
And so as to heated 蓄 to.

Referring to FIG. 1, reference numeral 15 denotes a compressor of the cooling / heating device 9, reference numeral 16 denotes a compressor drive circuit for driving the compressor 15, and reference numeral 17 denotes a four-way switching valve for switching the refrigerant system between cooling and heating. , 13 indoor heat exchanger including a previous heat exchange pipe 13A for warming the 蓄 cooling agent 10 is cooled or thermal storage agent 11, the expansion valve 18 for expanding the refrigerant compressed by the compressor 15, 19 Is an outdoor heat exchanger for shifting the temperature of the refrigerant to the outdoor temperature. Reference numeral 14 denotes a heater including the heating wire 14A, and reference numeral 20 denotes a heater drive circuit.

Reference numeral 21 is a temperature control circuit, 22 is a switch for switching between cooling and heating, 23 is a temperature detector in the refrigerator, and 24A is
蓄 cold temperature detector, 24B are thermal storage temperature detector. The temperature control circuit 21 operates the four-way switching valve 17 according to a program described later based on the designation by operating the switch 22 and the like.
Of the temperature detectors 23 and 24
The drive control of the compressor 15 and the heater 14 is performed with reference to the detected temperatures of A and 24B. Reference numeral 25 denotes a motor drive circuit that drives the door drive motor 7.

Reference numeral 26 denotes a sales control circuit which performs a sales operation of a product in response to insertion of a coin, etc., and drives the door driving motor 7 via an OR gate 27 to open and close the carry-out door 6.

The temperature control circuit 21 detects the temperature of the inside of the refrigerator when the temperature detected by the inside temperature detector 23 falls below a predetermined lower limit temperature during the inside cooling control, or detects the inside temperature of the inside of the refrigerator during the inside heating control. When the temperature detected by the heater 23 becomes equal to or higher than the predetermined upper limit temperature, the door driving motor 7 is driven via the OR gate 27 to open the carry-out door 6 irrespective of the control by the sales control circuit 26. I do.

Next, the operation of the vending machine having the above configuration will be described. FIG. 3 is a flowchart showing the operation, FIG. 4A is a temperature characteristic diagram of each part at the time of cooling, and FIG.
7 is a temperature characteristic diagram of each part at the time of heating.

The carry-out door 6 is temporarily opened with the selling operation (S1, S2). When the cooling operation is designated by the changeover switch 22 (S3), the four-way switching valve 17 is switched to the flow path shown by the solid line in the valve (S4), and the refrigerant flows as shown by the solid arrow. The refrigerant pressurized and heated by the compressor 15 releases heat in the outdoor heat exchanger 19, and is depressurized by passing through the expansion valve 18.
Cooled. The indoor heat exchanger 13 by heat exchange with cooled refrigerant as a heat source, to cool the 蓄 cooling agent 10 and the thermal storage agent 11.

Cold storage is performed during the midnight hours from 11:00 pm to 5:00 am. When the power is turned on at midnight (S
5). Detection temperature TA of 蓄 cold temperature detector 24A is 蓄 cooling agent 1
Compressor 15 to fall between TSL-2.alpha further from the fine temperature alpha ° C. lower by a predetermined temperature TSL-alpha than the predetermined 蓄 cold temperature (transition temperature) TSL of 0 is turned on and off (S6
~S9), is cooled 蓄 with the following sequence of operations.

The in-compartment lower limit of the cooling control temperature TS1, due 蓄 cold material 10 is slightly higher setting than the chamber temperature attainable is cooled, such as during normal day. When the compressor 15 is performing the on / off operation described above, or when the compressor 15 is stopped during the daytime or the like, the detected temperature TC of the internal temperature detector 23 is lower than the cooling lower limit temperature TS1 by a minute temperature β ° C. When the temperature reaches a predetermined temperature TS1-β (S1
0), the unloading door 6 is opened regardless of the selling operation (S1).
1) Or, when the detected temperature TC becomes equal to or higher than TS1 + β (S
12), the carry-out door 6 is closed (S13). And S1
S13 is repeated. During the period in which the carry-out door 6 is open, the product storage 1 is in communication with the outside air through the product take-out port 5, and the inside of the storage is heated by the outside air, and the inside temperature TC becomes short. It will be TS1 ± β soon.

When the heating operation is designated by the changeover switch 22 (S3), the four-way switching valve 17 is switched to the flow path shown by the broken line in the valve (S14), and the refrigerant is changed as shown by the broken arrow. Flows. Pressure, warmed refrigerant by the compressor 15, exchanges heat in the indoor heat exchanger 13, for heating the 蓄 cold agent 10 and the thermal storage agent 11. Then, the pressure is reduced and cooled by passing through the expansion valve 18, heated by the outdoor heat exchanger 19, and returned to the compressor 2.

The heat storage is performed at midnight from 11:00 pm to 5:00 am. When the power supply is turned on at midnight (S1
5), the thermal storage temperature detector 24B detects temperature TB is 蓄 cooling agent 1
Compressor 15 as from a predetermined thermal storage temperature (transition temperature) still small temperature than TSH alpha ° C. higher by a predetermined temperature TSH + alpha fall between TSH + 2.alpha of 0 is turned on and off (S1
6 to S19), heat is stored with the following operations.

The in-compartment heating control temperature of the upper limit value TS2 is set to be slightly lower than the inside temperature attainable is heated, such as during normal day by thermal storage material 11. When the compressor 15 is performing the above-described on / off operation, or when the compressor 15 is stopped during the daytime or the like, the detected temperature TC of the internal temperature detector 23 is smaller than the heating upper limit temperature TS2 by a minute temperature β ° C. When the temperature reaches a high predetermined temperature TS2 + β (S2
0), the unloading door 6 is opened regardless of the selling operation (S2).
1) Alternatively, if the detected temperature TC becomes equal to or lower than TS2-β (S
22), the carry-out door 6 is closed (S23). And S1
S3, S14 to S23 are repeated. Outgoing door 6 above
Is open, the inside of the refrigerator is cooled by the outside air, and the temperature TC inside the refrigerator becomes TS2 ± β within a short time.

[0021]

According to the present invention as described in the foregoing, leave the the 蓄 cooling agent to cool or thermal storage agent warmed at midnight, the day moderate, the predetermined lower limit temperature at the time of cooling in the refrigerator When the temperature drops below, or during heating, when the internal temperature rises above a predetermined upper limit temperature, the carry-out door is controlled to be opened, so that surplus power at midnight can be used effectively, and The inside of the refrigerator is not excessively cooled or excessively heated.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram of a vending machine showing one embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the vending machine of FIG.

FIG. 3 is a flowchart showing a control operation of the vending machine of FIG. 1;

FIG. 4 is a temperature characteristic diagram of each part of the vending machine of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Commodity storage, 4 ... Delivery shooter, 5 ... Commodity take-out opening, 6 ... Carry-out door, 7 ... Motor for door drive, 9 ... Cooling
Heating device, 10 ... 蓄 cooling agent, 11 ... thermal storage agent, 13 ... indoor heat exchanger, 13A ... heat exchanger pipe, 14 ... heater, 14A
... heating wire, 21 ... temperature control circuit, 22 ... switch, 23
... inside temperature detector, 24A ... 蓄 cold temperature detector, 24B ...
Thermal storage temperature detector, 26 ... sales control circuit, 27 ... OR gate -
G.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G07F 9/10 101

Claims (1)

(57) [Claims] 1. A vending machine having a carry-out door attached to a product take-out opening and automatically opening and closing in accordance with a product selling operation to enable cooling or heating of the inside of the vending machine. to thereby adjacent a heat source reservoir portion containing at least one of 蓄 cold agent or thermal storage agent, and a cooling means or heating means for or heating the thermal storage agent cooled 蓄 cooling agent, midnight time zone Activating the cooling means or the heating means at the same time, during the cooling in the refrigerator, when the temperature in the refrigerator falls below the predetermined lower limit temperature or during the heating in the refrigerator, the temperature in the refrigerator becomes lower. A vending machine, comprising: a control device for opening the carry-out door when the temperature rises above a predetermined upper limit temperature.