JPH0757141A - Automatic beverage vending machine - Google Patents

Abstract

PURPOSE:To effectively save electric power by detecting a frequency of vending and performing switching control over hot water temperature and cooling water temperature within specific temperature ranges according to the detected frequency. CONSTITUTION:This automatic vending machine has a hot water tank 1 wherein hot water for dilution is reserved and a cooling water tank 3 which contains and cools a syrup tank 2. Then a feed water valve 4, liquid level switches 5 and 6, a hot water temperature sensor 7, and a heater 8 are connected to a controller 9, which detects the frequency of vending by an internally set vending interval monitor timer and switches a heating device or/and a cooling device to power-saving operation when the frequency of vending is smaller than a previously set value. Namely, the hot water in the hot water tank 1 is held at 94-97 deg.C in normal operation. When the device is switched to the power-saving operation, the set temperature range is 84-87 deg.C. In the normal operation, the water temperature in the cooling water tank 3 is held at 0-3 deg.C. When the device is switched to the power-saving operation, the set temperature is 3-6 deg.C, there by carefully saving electric power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beverage vending machine which sells beverages by diluting beverage raw materials with dilution water kept at a predetermined temperature.

[0002]

2. Description of the Related Art Conventionally, beverage vending machines are provided with a heating device such as an electric heater and a cooling device such as a compressor for heating and cooling beverage raw materials and dilution water. For these heaters and compressors, the day of the week and the time of day when sales are infrequent are set in the timer in advance, and at that time, the set temperature of the dilution water tank heated by the heater is lowered, and raw materials and dilution water are supplied. In some cases, the set temperature of the cold water tank for keeping cold is raised to save electricity.

[0003]

However, in the above-mentioned beverage vending machine, it is troublesome to set or change the date and time at which power saving is performed, and if the date and time are set uniformly, power saving is actually performed. May not match the sales situation of the beverages in. In other words, even if the sales of beverages happen to be concentrated during the scheduled power saving period, the power saving state will continue as it is, so the cooling capacity or heating capacity will be insufficient, and there will be some beverages that can be sold out. Lights up and stops selling. Also, during normal hours when power is not saved, even if there is no sale at all, the products will be heated and cooled as usual, consuming power in vain.
Go against the purpose of saving electricity. In addition, although the set temperature is conventionally changed during power saving, since a certain amount of dilution water is held in the tank, unnecessary heating or cooling is performed even for an excessive amount of water that is not sold immediately. The present invention has been made to solve the above problems, and an object of the present invention is to provide an automatic vending machine capable of performing more effective power saving according to the actual sales situation. .

[0004]

In order to achieve the above object, a first aspect of the present invention is to set a preset temperature of a heating device for heating undiluted beverage liquid and / or dilution water or / and a cooling device for cooling it from the time of normal sale. Also, in a beverage vending machine that can change to the room temperature side to save power, the sales frequency is detected, and if the sales frequency is less than the preset value, the heating device and / or the cooling device are saved. It is characterized in that a means for switching to operation is provided.

In the second aspect of the invention, it is possible to perform a power saving operation by changing the set temperature of the heating device for heating the undiluted liquid beverage and / or the dilution water or / and the cooling device for cooling it to the room temperature side as compared with the time of normal sale. The automatic beverage vending machine is characterized in that it is provided with means for switching the heating device and / or the cooling device to a power-saving operation when the product is sold out.

In the third aspect of the invention, it is possible to perform a power saving operation by changing the set temperature of the heating device for heating the undiluted beverage solution and / or the dilution water or / and the cooling device for cooling it to the room temperature side as compared with the time of normal sale. The automatic beverage vending machine detects the day of the week and the time of day when the power saving operation is performed and the memory that stores the frequency of sale.If the frequency of sale is less than the preset value, the day of the week and the current time A means for writing the corresponding time zone in the memory, and referring to the memory, when the time zone corresponding to today's day of the week and the current time is written in the memory, the heating device or /
And a means for switching the cooling device to a power-saving operation.

A fourth aspect of the present invention is a water supply device for injecting dilution water stored in a tank in accordance with the outflow thereof to maintain a predetermined water level, and a heating device for heating the dilution water in the tank and / or cooling. A beverage vending machine equipped with a cooling device is provided with means for detecting the sales frequency and changing the set water level of the water supply device to a level lower than that during normal operation when the sales frequency is smaller than a preset value. It is characterized by that.

A fifth aspect of the present invention is a water supply device for pouring dilution water stored in a tank in accordance with its outflow to maintain a predetermined water level, and a heating device and / or a cooling device for heating the dilution water in the tank. A beverage vending machine provided with a cooling device is characterized in that it is provided with means for changing the set water level of the water supply device to a level lower than that during normal operation when the water is sold out.

A sixth aspect of the invention is to supply a dilution water stored in the tank in accordance with the outflow of the dilution water and maintain it at a predetermined water level, and a heating device and / or a cooling device for heating the dilution water in the tank. In a beverage vending machine equipped with a cooling device, a memory that stores in advance the day of the week and the time period during which power saving operation is performed, and the sales frequency are detected, and if the sales frequency is smaller than the preset value, today's Refers to the means for writing the time of day corresponding to the day of the week and the current time in the memory, and when the time corresponding to the day of the week and the current time of the day is written in the memory, the set water level of the water supply device is normally operated. It is characterized by having a means for changing to a lower position than time.

[0010]

In the first aspect of the present invention, when the detected sales frequency is smaller than the preset value, the heating device for heating the stock beverage liquid or the diluted water or the cooling device for cooling is switched to the power saving operation.

According to the second aspect of the present invention, when the sold-out liquid is sold out, the heating device for heating the stock beverage liquid or the diluting water and the cooling device for cooling are switched to the power saving operation.

In the third invention, the sales frequency is detected, and when the sales frequency is smaller than a preset value, the day of the week of today and the time zone corresponding to the current time are written in the memory. Then, when the memory is referred to and the time zone corresponding to the current day of the week and the current time is written in the memory, the heating device that heats the undiluted beverage liquid or the diluted water or the cooling device that cools the beverage is switched to the power saving operation. .

In the fourth aspect of the present invention, when the detected sales frequency is smaller than a preset value, the water level in the tank is maintained at a lower level than during normal operation and is heated or cooled.

In the fifth aspect of the present invention, when the product is sold out, the water level in the tank is maintained at a lower level than during normal operation, and heating or cooling is performed.

In the sixth invention, when the detected sales frequency is smaller than a preset value, the day of the week of today and the time zone corresponding to the current time are written in the memory. Then, when the memory is referred to and the time zone corresponding to today's day of the week and the current time is written in the memory, the water level of the tank is kept lower than in the normal operation and is heated or cooled.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment according to the present invention. The illustrated beverage vending machine has a hot water tank 1 that stores hot water for dilution, and a cold water tank 3 that stores and cools a syrup tank 2. The syrup tank 2 stores syrup, which is the undiluted solution of the beverage. Hot water tank 1 is water supply valve 4
Water is supplied by being connected to the water supply through the water tank 1, and the hot water tank 1 has liquid level switches 5, 6, a hot water temperature sensor 7, and a heater 8.
Is installed.

The water supply valve 4, the liquid level switches 5 and 6, the hot water temperature sensor 7, and the heater 8 are connected to the control device 9, so that the water level in the hot water tank 1 is high during normal operation to save electricity. The water level is detected by the liquid level switches 5 and 6 having different installation levels so that the water supply valve 4 is controlled to be opened and closed so that the time is kept low. The liquid level switch 5,
6 is opened and closed by the vertical movement of the floats 11 and 12. Similarly, the hot water temperature in the hot water tank 1 is detected by the hot water temperature sensor 7, and the heater 8 is controlled to be turned on and off, whereby the hot water temperature is kept constant.

The cold water tank 3 also has a water temperature sensor 13,
A cooling pipe 14 is installed. The cooling pipe 14 is connected to the compressor 15, and the refrigerant compressed by the compressor 15 circulates in the cooling pipe 14 to cool the inside of the cold water tank 3. That is, the start / stop of the compressor 15 is controlled by the water temperature of the cold water tank 3 detected by the water temperature sensor 13, and the water temperature of the cold water tank 3 is kept constant. In addition,
Although not shown, the cold water tank 3 may be provided with a cold water tank for storing cold water for dilution.

FIG. 2 is a block diagram and a circuit diagram showing the internal configuration of the control device 9 of FIG. Control device 9 is CP
U21, ROM22, RAM23, RTC (clock I
C) It is composed of a microcomputer of 24. The open / close signals of the liquid level switches 5 and 6 are input to the CPU 21 via the I / O port 25, and the temperature signals detected by the hot water temperature sensor 7 and the water temperature sensor 13 are passed via the analog / digital converter 26. Is entered.

An operation signal is output from the I / O port 25 to the water supply valve relay 31, the compressor relay 32, and the heater relay 33 via the inverters 27 to 29. By these relays 31 to 33, the water supply valve 4, the compressor 15, and the heater 8 are operated, the water level in the hot water tank 1 is kept constant, and the cold water temperature of the cold water tank 3 and the hot water temperature of the hot water tank 1 are kept constant. To be kept. The control device 9 controls the water level and the temperature, which have been conventionally executed, within a predetermined range, and also controls the power saving operation according to the present invention described later.

FIG. 3 is a graph showing the operation of the heater 8 in the hot water tank 1 and the change in the hot water temperature in comparison between the normal operation and the power saving operation. In normal operation, when the heater 8 is turned on to heat the inside of the hot water tank 1, the hot water temperature rises. When the hot water temperature reaches 97 ° C, the heater 8 is turned off. Next, when the temperature of the hot water in the hot water tank 1 starts to drop and drops to 94 ° C, the heater 8 is turned on again. In this way, the water temperature is 94 ° C
To 97 ° C to 97 ° C. Here, when switching to the power saving operation, the set temperature range goes from 84 ° C. to 87 ° C., the heater 8 is turned on when the hot water temperature drops to 84 ° C., and the heater 8 is turned off when the hot water temperature rises to 87 ° C.

When the setting of the hot water temperature of the hot water tank 1 is lowered in this way, the difference between the hot water temperature and the outside air temperature is reduced accordingly, and the heat radiation from the hot water tank 1 to the outside air is reduced. As a result, the operation interval of the heater 8 is lengthened and the effect of power saving is obtained. Figure 4
4 is a graph showing the operation of the compressor 15 for cooling the cold water tank 3 and the change in the water temperature of the cold water tank 3 in comparison between the normal operation and the power saving operation. In normal operation, the compressor 1
When 5 operates and the cold water tank 3 is cooled, the water temperature decreases. When the water temperature reaches 0 ° C, the compressor 15 is turned off.

Then, the water temperature in the cold water tank 3 starts to rise,
When the water temperature reaches 3 ° C, the compressor 15 is turned on again. In this way, the water temperature is kept within the range of 0 ° C to 3 ° C. Here, when switching to the power saving operation, the set temperature range is changed from 3 ° C to 6 ° C, the compressor 15 is turned on when the water temperature rises to 6 ° C, and is turned off when the water temperature drops to 3 ° C. By increasing the water temperature setting of the cold water tank 3 in this way, the difference between the water temperature and the outside air temperature becomes smaller,
The flow of heat from the outside air into the cold water tank 3 is reduced. As a result, the operation interval of the compressor 15 becomes longer and the effect of power saving can be obtained.

Next, an embodiment of the first invention will be described. In the beverage vending machine shown in FIGS. 1 and 2, the first embodiment of the present invention determines whether to perform normal operation or power-saving operation based on the current sales situation, thereby saving power efficiently. to enable. The specific control operation is performed as shown in the flowchart of FIG. First, the sales interval monitoring timer is started (S1), and the presence or absence of sales within a fixed time is detected (S2, S5).

If there is a sale within a certain period of time (S2Y
ES), stop the sales interval monitoring timer (S3), and switch to normal operation (S4). When there is no sale within a certain period of time (S2 NO, S5 YES), the sale interval monitoring timer is stopped (S6), and power saving operation is switched to (S7). The normal operation and the power saving operation here are the operations of the heater 8 and the compressor 15 shown in FIGS. 3 and 4.

In this embodiment, according to the actual sales frequency,
If it sells frequently, it will switch to normal operation, and if it does not, it will switch to power saving operation, which can cause unreasonable power saving operation and cause it to sell out, or consume extra power by unnecessary heating and cooling. It is prevented. In this embodiment, it is also possible to detect the sales frequency of each of hot beverages and cold beverages and switch between normal operation and power saving operation for each system. In that case, more detailed power saving becomes possible.

Next, an embodiment of the second invention will be described. The embodiment of the second invention is similar to the embodiment of the first invention in that the beverage vending machine shown in FIGS. 1 and 2 is operated normally based on whether or not the stock of the commercial beverage is available, that is, whether or not the beverage is sold out. Efficient power saving is enabled by determining whether to perform power saving operation or power saving operation. The specific control operation is performed as shown in the flowchart of FIG.

First, it is detected whether or not all hot beverages have been sold out (S11), and if they have been sold out (YES in S11), the heater 8 is switched to the power saving mode (S12). If not sold out (S11 NO),
The heater 8 is switched to normal operation (S13). Then
Detects whether all cold beverages have been sold out (S
14) If sold out (YES in S14), the compressor 15 is switched to the power saving operation (S15). If not sold out (S14 NO), the compressor 15
To normal operation (S16).

The normal operation and the power saving operation referred to here are shown in FIG.
The operation is performed by switching the set temperature as shown in FIG. In this embodiment, if the beverage is sold out during sale, power saving operation is switched to prevent unnecessary cooling or heating until the beverage is replenished thereafter. As a result, the waste of electric power during the replenishment waiting time is eliminated. It should be noted that it is also possible to combine the embodiment of the second invention and the embodiment of the first invention.

Next, an embodiment of the third invention will be described. The embodiment of the third invention is similar to the embodiment of the first invention, in the beverage vending machine shown in FIG. 1 and FIG. The transition of the sales frequency is stored, and a schedule for the normal operation or the power saving operation is prepared in advance for each day of the week and time of day by this storage. Efficient power saving is enabled by switching to either normal operation or power saving operation based on this schedule. The specific control operation is performed as shown in the flowchart of FIG.

First, the sales interval monitoring timer is started (S21), and the presence or absence of sales within a fixed time is detected (S22, S26). If there is a sale within a certain period of time (S22 YES), the sale interval monitoring timer is stopped (S2
3) The current day of the week and the current time are written in the writing area of the normal operation time zone secured in the memory (S24). At the same time, today's day of the week and the current time are cleared from the power saving operation time zone area of the memory (S2).
5).

If there is no sale within a certain period of time (S2
2NO, S26 YES), the sales interval monitoring timer is stopped (S27), and today's day of the week and current time are written and set in the area of the power saving operation time zone secured in the memory (S28). At the same time, today's day of the week and the current time are cleared from the normal operation time zone area of the memory (S29). Here, referring to the memory for today's day of the week and the current time, it is read which area of the power saving operation time zone and the normal operation time zone is written, and if it is written in the power saving operation time zone (S30YE
S), switching to power saving operation (S31).

If not (S30 NO), the operation is switched to normal operation (S32). The normal operation and the power saving operation here are operations performed by switching the set temperatures of the heater 8 and the compressor 15 shown in FIGS. 3 and 4. In this embodiment, the day of the week and the time period during which the power saving operation is performed are previously learned and stored in advance on a weekly basis, so that the power saving operation can be performed more efficiently. It should be noted that the embodiment of the third invention can also be configured by combining it with the embodiments of the first and second inventions.

Next, an embodiment of the fourth invention will be described. In the beverage vending machine shown in FIGS. 1 and 2, the fourth embodiment of the invention reduces the amount of water in the hot water tank 1 by switching the water level in the hot water tank 1 to a level lower than that during normal operation. In addition to making it possible to save electricity, it is possible to determine whether to use the normal water level or the power saving water level based on the current sales situation. The specific control operation is performed as in the flowchart shown in FIG. First, the sales interval monitoring timer is started (S41), and the presence or absence of sales within a fixed time is detected (S42, S45).

If there is a sale within a certain period of time (S42
If YES, the sales interval monitoring timer is stopped (S43), the water level of the hot water tank 1 is switched to the normal water level, and the normal operation is performed (S44). If there is no sale within a certain time (S4
2NO, S45 YES), the sales interval monitoring timer is stopped (S46), and the water level of the hot water tank 1 is switched to the power saving water level (S47).

When the water level of the hot water tank 1 is switched to the power saving water level, the amount of hot water stored in the hot water tank 1 is reduced, and the amount of heat released from the hot water kept at a temperature higher than that of the open air to the open air is reduced.
To that extent, the energization time of the heater 8 is reduced, and wasteful power consumption is prevented. That is, also in this case, the power saving operation is performed as in the case where the set temperature is lowered. It should be noted that the embodiment of the fourth invention can also be configured by combining with the embodiments of the first to third inventions.

Next, an embodiment of the fifth invention will be described. In the beverage vending machine shown in FIGS. 1 and 2, the fifth embodiment of the invention switches the water level of the hot water tank 1 to the lower water level to reduce the amount of water in the hot water tank 1 and enable power saving. At the same time, it is determined whether to set the normal water level or the power saving water level based on whether or not the stock of the commercial beverage is available, that is, whether or not the stock is sold out. The specific control operation is performed as shown in the flowchart of FIG. First,
It is detected whether all hot beverages have been sold out (S5
1) If the water is sold out (YES in S51), the water level of the hot water tank 1 is switched to the power saving water level (S52).

If not sold out (S51 NO),
The water level of the hot water tank 1 is switched to the normal water level for normal operation (S53). In this embodiment, when the hot type beverage is sold out during the sale of the beverage, the water level in the hot water tank 1 is switched to the power saving water level until the beverage is replenished thereafter, resulting in unnecessary power consumption. Is prevented. It should be noted that the fifth embodiment of the invention can also be configured by combining with the respective embodiments of the first to fourth inventions.

Next, an embodiment of the sixth invention will be described. In the beverage vending machine shown in FIGS. 1 and 2, the sixth embodiment of the invention switches the water level of the hot water tank 1 to a lower water level to reduce the amount of water in the hot water tank 1 to enable power saving. At the same time, the transition of the sales frequency on the day of sale, from the current sales status to the day of the week and the time of day is stored, and a plan for normal operation or power saving operation is planned in advance for each day of the week and time of day by this memory. . Efficient power saving can be achieved by switching to either normal operation at normal water level or power saving operation at power saving water level based on this schedule.

The specific control operation is performed as shown in the flowchart of FIG. First, the sales interval monitoring timer is started (S61), and the presence or absence of sales within a fixed time is detected (S62, S66). If there is a sale within a certain period of time (YES in S62), the sale interval monitoring timer is stopped (S63), and today's day of the week and current time are written and set in the area of the normal operation time zone secured in the memory. (S64). At the same time, today's day of the week and the current time are cleared from the power saving time zone area (S
65).

If there is no sale within a certain period of time (S6
2NO, S66 YES), the sales interval monitoring timer is stopped (S67), and today's day of the week and current time are written and set in the area of the power saving operation time zone secured in the memory (S68). At the same time, today's day of the week and the current time are cleared from the normal operation time zone area (S6).
9). Here, referring to the memory for today's day of the week and the current time, it is read which area of the power saving operation time zone and the normal operation time zone is written, and if it is written in the power saving operation time zone (S70 YES) The water level of the hot water tank 1 is switched to the power saving water level to perform the power saving operation (S71).

If not (S70 NO), the water level of the hot water tank 1 is switched to the normal water level to perform the normal operation (S).
72). In this embodiment, the day of the week and the time period during which the power saving operation is performed are previously learned and stored in advance on a weekly basis, so that the power saving operation can be performed more efficiently. It should be noted that the first to fifth embodiments are also applied to the embodiment of the sixth invention.
It is also possible to configure in combination with each embodiment of the invention. As described above, in each of these embodiments, power saving is finely performed according to the actual sales situation, and the power consumption for heating or cooling is further reduced as compared with the conventional model. Further, the display of sold-out due to an unreasonable power-saving operation, which often occurs in the past, is also eliminated.

[0043]

As described above, according to the first invention,
When the detected sales frequency is low, by switching to the power saving operation, efficient power saving according to the actual sales situation is performed.

According to the second aspect of the present invention, when the product is sold out, the mode is switched to the power saving operation, so that efficient power saving according to the actual sales situation is performed.

According to the third aspect of the present invention, the day of the week and the time of day when the sales frequency is low are written in the memory, and the memory is referenced to switch to the power saving operation, so that the power can be efficiently saved according to the actual sales situation. Done.

According to the fourth aspect of the present invention, when the sales frequency is low, the water level in the tank is kept lower than in the normal operation, so that efficient power saving according to the actual sales situation is performed.

According to the fifth aspect of the present invention, when the product is sold out, the water level in the tank is kept lower than that during normal operation, so that efficient power saving according to the actual sales situation is performed.

According to the sixth aspect of the present invention, the day of the week and the time of day when the sales frequency is low are written in the memory, and the water level of the tank is kept lower than that in the normal operation by referring to the memory so that the actual sales can be performed. Efficient power saving is performed according to the situation.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment according to the present invention.

2 is a block diagram and a circuit diagram showing an internal configuration of the control device of FIG. 1. FIG.

FIG. 3 is a graph showing the relationship between the heater operation and the change in hot water temperature in FIG.

FIG. 4 is a graph showing the relationship between the compressor operation and the change in water temperature in FIG.

FIG. 5 is a flowchart showing an operation of the embodiment according to the first invention.

FIG. 6 is a flowchart showing an operation of the embodiment according to the second invention.

FIG. 7 is a flowchart showing the operation of the embodiment according to the third invention.

FIG. 8 is a flowchart showing an operation of the embodiment according to the fourth invention.

FIG. 9 is a flowchart showing an operation of the embodiment according to the fifth invention.

FIG. 10 is a flowchart showing an operation of the embodiment according to the sixth invention.

[Explanation of symbols]

 1 Hot Water Tank 2 Syrup Tank 3 Cold Water Tank 4 Water Supply Valve 5, 6 Liquid Level Switch 7 Hot Water Temperature Sensor 8 Heater 9 Control Device 11, 12 Float 13 Water Temperature Sensor 14 Cooling Pipe 15 Compressor 21 CPU 22 ROM 23 RAM 24 RTC 25 I / O port 26 Analog / digital converter 27-29 Inverter 31 Water supply valve relay 32 Compressor relay 33 Heater relay

Claims (6)

[Claims] 1. A beverage automatic vending system capable of performing a power saving operation by changing a preset temperature of a heating device for heating a beverage concentrate or / and a dilution water or / and a cooling device for cooling to a room temperature side as compared with a normal sale time. A vending machine for beverages, comprising means for detecting a sales frequency and switching the heating device and / or the cooling device to a power saving operation when the sales frequency is smaller than a preset value. 2. A beverage automatic vending system capable of performing a power saving operation by changing the set temperature of a heating device for heating a beverage stock solution or / and a dilution water or / and a cooling device for cooling to a room temperature side as compared with a normal sale time. An automatic beverage vending machine, characterized in that it is provided with means for switching the heating device and / or the cooling device to a power saving operation when the machine is sold out. 3. A beverage automatic vending system capable of performing a power saving operation by changing the set temperature of a heating device for heating a stock solution of beverage or / and dilution water or / and a cooling device for cooling to a room temperature side as compared with the time of normal sale. In the machine, the memory that stores the day of the week and the time zone in which the power saving operation is performed in advance, and the sales frequency are detected.If the sales frequency is less than the preset value, the time zone corresponding to the current day of the week and the current time To the memory, and means for referencing the memory and switching the heating device and / or the cooling device to the power saving operation when the day of the week and the time zone corresponding to the current time are written in the memory. Beverage vending machine characterized by that. 4. A water supply device for pouring dilution water stored in a tank according to its outflow to maintain a predetermined water level, a heating device for heating the dilution water in the tank, and / or a cooling device for cooling the dilution water. Beverage vending machines equipped with a means to detect the sales frequency and change the set water level of the water supply device to a lower level than during normal operation when the sales frequency is lower than a preset value. A featured beverage vending machine. 5. A water supply device for pouring dilution water stored in a tank according to its outflow to maintain a predetermined water level, a heating device for heating the dilution water in the tank, and / or a cooling device for cooling the dilution water. A vending machine for beverages, comprising means for changing the set water level of the water supply device to a level lower than that during normal operation when sold out. 6. A water supply device for pouring dilution water stored in a tank according to its outflow to maintain a predetermined water level, a heating device for heating the dilution water in the tank, and / or a cooling device for cooling the dilution water. In a beverage vending machine equipped with, a memory that stores the day of the week and the time of day when the power saving operation is performed, and the sales frequency are detected, and if the sales frequency is less than the preset value, the day of the week and the current day If the time zone corresponding to today's day of the week and the current time are written in the memory by referring to the means for writing the time zone corresponding to the time to the memory, the set water level of the water supply device is set to be lower than that during normal operation. A beverage vending machine characterized by having a means for changing to a lower level.