JP2002019887A - Drink dispenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piston type syrup meter of a drink dispenser wherein syrup is diluted with diluting water such as water, soda water, thereby supplying a drink, wherein even if the viscosity of syrup changes, feed rates of syrup can be controlled in a stable manner so that a drink having a proper dilution ratio can be supplied. SOLUTION: By providing, in the drink dispenser, a magnetic member 19a of a piston 19 of a piston type syrup meter 16 for use in the drink dispenser, magnetic sensors 20a, 20b to sense that the piston 19 has moved to one of the opposite ends of a cylinder 18, and a feed control part 100 to output a control signal for changing over the moving direction of the piston 19 according to the sensing outputs of the sensors 20a, 20b, syrup of a constant volume can always be delivered even if the viscosity of the syrup varies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beverage dispenser, a beverage dispenser, a cup type vending machine, and the like, for supplying a beverage by diluting a syrup with a diluting water such as water or carbonated water.

[0002]

2. Description of the Related Art In beverage dispensers and cup-type vending machines, beverages are cooked and sold by diluting a syrup obtained by concentrating beverage ingredients at a predetermined ratio with dilution water such as water or carbonated water. In order to make the dilution ratio appropriate, in a conventional beverage dispenser or a cup-type vending machine, a service person adjusted a syrup flow regulator by adjusting a syrup flow regulator at the time of market installation. This operation took about 20 to 30 minutes for one beverage dispenser or cup-type vending machine, even if the type of syrup was four, resulting in a large labor cost.

[0003] As means for solving such a point, a flow meter for supplying diluting water to the dilution water supply line while measuring it and a piston type syrup meter for delivering a constant volume of syrup to the syrup supply line are provided. There has been proposed a beverage supply device that mixes the beverages while controlling the flow rate of the beverages.

FIG. 6 is a configuration diagram showing a piston type syrup meter 16. As shown in FIG. 6, the syrup meter 16 includes a cylinder 18 having both ends closed, and a piston 19.
The piston 19 can reciprocate right and left in the cylinder 18. Syrup outlets 18a and 18b are provided at both ends of the cylinder 18. When syrup is fed into the cylinder left chamber 18L from one syrup outlet 18a, the piston 19 is pushed toward the other syrup outlet 18b. To the other end. Meanwhile, the syrup in the other cylinder right chamber 18R is pushed out through the syrup outlet 18b.

Next, when the syrup is fed into the cylinder right chamber 18R from the other syrup outlet 18b, the piston 19 is pushed toward the syrup outlet 18a and moves to the other end. During that time, the syrup in the cylinder left chamber 18L is pushed out through the syrup outlet 18a. Thus, each time the piston 19 moves once, a certain amount of syrup corresponding to the internal capacity of the cylinder 18 is pushed out from the syrup meter 16.

FIG. 7 is a diagram showing the operation of a syrup meter using two three-way valves. When the three-way valves 21a and 21b are in the positions shown in FIG.
It is pushed by the syrup fed from the syrup outflow / inlet 18a side through 1a, and moves to the right (in the direction of the arrow in the figure). At that time, the syrup in the cylinder right chamber 18R is pushed out from the outflow port 18b and is sent out through the three-way valve 21b.

When the piston 19 reaches the right end and a predetermined time has elapsed, the three-way valves 21a and 21b are switched to the position shown in FIG. As a result, the piston 19 is pushed by the syrup fed from the syrup inflow / outlet 18b through the three-way valve 21b, and moves to the left (in the direction of the arrow in the figure). At that time, the syrup in the cylinder left chamber 18L is pushed out from the syrup outflow / inlet 18a and is sent out through the three-way valve 21a.

When the piston 19 reaches the left end and a predetermined time has elapsed, the three-way valves 21a and 21b are again switched to the state shown in FIG.
The operation is switched to the position (a), and such an operation is repeated. Thus, each time the piston 19 moves once, a certain amount of syrup corresponding to the product of the area of one end face of the piston 19 and the moving distance is sent out from the syrup meter 16. Therefore, the delivery amount of syrup can be managed by the volume obtained from the product of the area of one end surface of the piston 19 and the movement distance and the number of times the piston 19 moves.

[0009]

However, syrup has a large viscosity, and its viscosity varies greatly depending on the temperature, and the viscosity varies greatly depending on the type.
The syrup is fed into the piston type syrup meter, and the resistance in the pipe from which the syrup is extruded from the piston type syrup meter also greatly changes due to the viscosity change.
As a result, the syrup is fed into the cylinder 18, the piston 19 moves by being pushed by the syrup to be fed, and the time required to fill the syrup into the cylinder 18 largely depends on the syrup viscosity. Is used, depending on the setting of the switching time of the three-way valve, the three-way valves 21a and 21b are switched during the movement of the piston 19 from one end of the cylinder 18 to the other end, and a syrup shortage occurs. In addition, the syrup meter 16 supplied from the syrup meter 16 provides an inappropriate beverage having an insufficient dilution ratio. Therefore, with the piston type syrup meter in the above conventional beverage supply device, in order to prevent syrup filling shortage, at the time of shipment from the factory, the syrup viscosity is highest, that is, according to the syrup that requires the most filling time, three-way There has been a problem that the switching time of the three-way valve needs to be adjusted by the serviceman each time the valve switching time is set or the market is set up.

Accordingly, an object of the present invention is to provide a piston type syrup meter for dispensing a syrup of a beverage supply device for supplying a beverage by diluting the syrup with water or carbonated water, and the viscosity of the syrup changes. An object of the present invention is to provide a piston type syrup meter of a beverage supply device capable of stably controlling a syrup delivery amount without causing syrup filling shortage and providing a beverage having an appropriate dilution ratio.

[0011]

Means for Solving the Problems In order to solve the above-mentioned problems, the invention according to claim 1 comprises a cylinder having two outflow ports at both closed ends, and a reciprocating movement in the interior of the cylinder. A constant volume pump composed of a sliding body that allows a constant amount of liquid material to flow in and out at the outflow port, and a liquid mixing unit that mixes the liquid material and dilution water from the constant volume pump and supplies it as drinking water, And a control for outputting a control signal for switching a moving direction of the sliding body in accordance with a detection output of the position sensor, wherein the position sensor detects that the sliding body has moved to both ends of the cylindrical body. And a unit.

According to a second aspect of the present invention, in the constant volume pump, the liquid material is prevented from flowing when the two outlets and the liquid material flow out, and the liquid material is discharged when the two outlets and the liquid material flow. The control unit switches the moving direction of the sliding body by controlling the opening and closing of the valve means using a control signal.

According to a third aspect of the present invention, the position sensor comprises:
It is characterized by comprising a magnetic member provided on a sliding body, and a magnetic sensor provided on a cylindrical body and detecting proximity of the magnetic member.

According to a fourth aspect of the present invention, the dilution water supply line for supplying the dilution water to the liquid mixing section includes a flow meter for detecting a flow rate of the dilution water, and a supply solenoid valve for supplying or stopping the dilution water. And the control unit controls opening and closing of the supply solenoid valve based on the count output of the flow meter.

The invention according to claim 5 is characterized in that the dilution water supply line has a flow rate adjusting means for adjusting the flow rate of the dilution water according to the viscosity of the liquid raw material.

The invention according to claim 6 has a memory means for storing a flow count value counted by the flow meter, and the control unit comprises:
The opening and closing of the supply solenoid valve is controlled based on the flow count value from the memory means.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. Note that the same reference numerals are used for the same configurations as those in the related art.

FIG. 1 is a schematic configuration diagram of a beverage supply device of the present invention. In FIG. 1, 1 is a water inlet solenoid valve, 2 is a water pump, 3 is a water cooling coil, 4 is a water flow meter (flow meter), 5 is a water amount adjusting valve (flow rate adjusting means), and 6 is a water solenoid valve (supply). Solenoid valve), 7 is a carbonator water supply solenoid valve, 8 is a carbonator, 9 is a carbonated water flow meter (flow meter), 10
Is a carbonated water amount adjusting valve (flow rate adjusting means), 11 is a carbonated water cooling coil, 12 is a carbonated water electromagnetic valve (supply electromagnetic valve), 13 is a carbon dioxide gas cylinder, 14 is a syrup tank, 15 is a syrup cooling coil, and 16 is a syrup meter (Constant volume pump),
17 is a multi-valve (liquid mixing section).

Water is supplied to a water inlet solenoid valve 1 by a water pump 2.
The water is supplied from the water supply line 22 to the multi-valve 17 via the water cooling coil 3 for water cooling, the water flow meter 4, the water amount adjustment valve 5 and the water solenoid valve 6. Further, the water supply line 22 is branched and connected to the carbonator 8 via the carbonator water supply electromagnetic valve 7. In the carbonator 8,
The carbon dioxide gas supplied from the carbon dioxide gas cylinder 13 is filled with a predetermined pressure (for example, a gauge pressure of 0.6 MPa).
Carbonated water produced by dissolving carbon dioxide in the water supplied into the carbonator 8 is heated by the pressure of the carbon dioxide gas.
The carbonated water is supplied from the carbonated water supply line 23 to the multi-valve 17 via the carbonated water flow meter 9, the carbonated water amount adjusting valve 10, the carbonated water cooling coil 11 for cooling the carbonated water, and the carbonated water electromagnetic valve 12.

On the other hand, the syrup (liquid raw material) is extruded from the syrup tank 14 by the pressure of the carbon dioxide gas supplied from the carbon dioxide gas cylinder 13, and the syrup cooling coil 15 for cooling the syrup and the syrup meter 1 for quantitatively sending the syrup are provided.
6 is supplied to the multi-valve 17. In addition, the syrup tank 14, the syrup cooling coil 15, and the syrup meter 16 are provided in numbers corresponding to the drinks to be sold.

In the multi-valve 17, the syrup cooling coil 15, the syrup meter 1
6 is mixed with water or diluted water such as carbonated water supplied via the water solenoid valve 6 or the carbonated water solenoid valve 12 to obtain a beverage adjusted to an appropriate concentration. Is discharged.

FIG. 2 is a configuration diagram showing the piston type syrup meter 16. As shown in FIG. 2, the syrup meter 16 detects the proximity of a cylinder 18 (cylinder) having both ends closed, a piston 19 (sliding body) having a magnetic member 19a embedded therein, and a magnetic member 19a embedded in the piston 19. The piston 19 can reciprocate left and right in the cylinder 18. More specifically, the piston 19 is connected to the cylinder 18
When the magnetic member 19a is in contact with the magnetic sensor 20a via the cylinder 18 and the piston 19 is in contact with the right inner surface of the cylinder 18, the magnetic member 19a The magnetic member 19a and the magnetic sensor 20
a and 20b are provided. Syrup outlets 18a and 18b are provided at both ends of the cylinder 18,
When syrup is fed into the cylinder left chamber 18L from one syrup outflow / inlet 18a, the piston 19 is pushed toward the other syrup outflow / inlet 18b and moves to the other end. Meanwhile, the syrup in the other cylinder right chamber 18R is pushed out through the syrup outlet 18b.

Next, when the syrup is fed into the cylinder right chamber 18R from the other syrup outlet 18b, the piston 19 is pushed toward the syrup outlet 18a and moves to the other end. During that time, the syrup in the cylinder left chamber 18L is pushed out through the syrup outlet 18a. Thus, every time the piston 19 moves once, a certain amount of syrup corresponding to the internal capacity of the cylinder 18 is sent out from the syrup meter 16.

When the syrup meter 16 is operated, the syrup is fed into one of the syrup outlets 18a and 18b.
The switching of the pipeline for sending out the syrup extruded from the other one of the a and 18b is performed by using a four-way valve in which the syrup inflow and outflow are switched by one valve, and the syrup inflow and outflow are switched by different valves. Using two three-way valves to alternate between the two, and four two-way valves that switch using two valves for each of the syrup inflow and outflow
There is a method of using a plurality.

FIG. 3 is a diagram showing the operation of a syrup meter using two three-way valves. When the three-way valves 21a and 21b are in the position shown in FIG.
It is pushed by the syrup fed from the syrup outflow / inlet 18a side through 1a, and moves to the right (in the direction of the arrow in the figure). At that time, the syrup in the cylinder right chamber 18R is pushed out from the outflow port 18b and is sent out through the three-way valve 21b.

When the piston 19 reaches the right end and the magnetic sensor 20b detects the proximity of the magnetic member 19a, the three-way valves 21a and 21b are switched to the position shown in FIG. As a result, the piston 19 is pushed by the syrup fed from the syrup inflow / outlet 18b through the three-way valve 21b, and moves to the left (in the direction of the arrow in the figure). At that time, the syrup in the cylinder left chamber 18L is pushed out from the syrup outflow / inlet 18a and is sent out through the three-way valve 21a.

When the piston 19 reaches the left end and the magnetic sensor 20a detects the approach of the magnetic member 19a, the three-way valves 21a and 21b are switched to the position shown in FIG. 3A again, and such operation is repeated. . In that way,
Each time the piston 19 moves once, a certain amount of syrup corresponding to the product of the area of one end face of the piston 19 and the moving distance is sent out from the syrup meter 16. Therefore, the delivery amount of syrup can be managed by the volume obtained from the product of the area of one end surface of the piston 19 and the movement distance and the number of times the piston 19 moves.

Next, control of the beverage supply device of the present invention will be described. FIG. 4 is a control block diagram of the beverage supply device of the present invention. The reference numerals correspond to those in FIGS. 1, 2 and 3. The control is performed by the supply control unit 100, and counts clocks generated by a memory 102 that stores control data of each unit of the beverage supply device and a reference clock generation unit (not shown), and controls the water solenoid valve 6 or the carbon dioxide. A timer 103 is provided for counting a delay time (for example, about 0.2 seconds) from when the water solenoid valve 12 is opened to when the syrup meter 16 is operated. The memory 102 supplies the number of pulses of the flow meter required to supply a predetermined amount of dilution water and the number of operations of the syrup meter 16 required to supply a predetermined amount of syrup, that is, in order to supply a predetermined amount of syrup, The number of times that the magnetic sensors 20a and 20b must detect the proximity of the magnetic member 19a is stored. Input device 50
Is composed of a keyboard or the like, for inputting various control setting values. The input setting values are stored in the memory 1
02 is displayed on a display unit (not shown) and can be checked as necessary. The sales switch 60 is a plurality of beverage selection switches provided on the front side of the beverage supply device, and includes a syrup number, a sales amount (large, medium, and small cup sizes), and a carbonation (carbonated beverage, slightly carbonated beverage, none). Carbonated beverages) are assigned.

When the beverage supply device is installed, the ratio of the supply amount of dilution water such as water or carbonated water to the amount of syrup for each beverage, that is, the dilution ratio, is input by the input device 50, and is stored in the memory 102. Set it. In addition, the water inlet solenoid valve 1 and the water solenoid valve 6 are opened, the water pump 2 is operated to flow a predetermined amount of water through the water flow meter 4, and the output pulses of the water flow meter 4 during that time are counted. Then, the counted number of pulses is stored in the memory 102. Similarly, in the carbonated water flow meter 9, the output pulse is counted by opening the carbonated water electromagnetic valve 12 and stored in the memory 102.

As described above, a predetermined amount of dilution water is passed through the flow meter, and the output pulses of the flow meter during that time are counted and stored in the memory 102, so that the beverage supply device can be used during the use. Even if the flow rate of the dilution water to be sent fluctuates, the supply is stopped when the number of pulses of the flow meter output corresponding to the fluctuated flow rate reaches the number of pulses stored in the memory 102. It is possible to reliably supply a predetermined amount of dilution water.

When the sales switch 60 is selected and a signal is output from the supply control unit 100 to the syrup meter 16, for example, when the valve positions of the three-way valves 21a and 21b are switched as shown in FIG. The syrup is pushed by the syrup fed from the syrup outflow / inlet 18a through the three-way valve 21a, and moves rightward (in the direction of the arrow in the figure).
At that time, the syrup in the cylinder right chamber 18R is pushed out from the outflow port 18b and is sent out through the three-way valve 21b.

When the piston 19 reaches the right end and the magnetic sensor 20b detects the proximity of the magnetic member 19a, the three-way valves 21a and 21b receive signals from the supply control unit 100 to operate as shown in FIG.
The position can be switched to (b). As a result, piston 1
9 moves to the left (in the direction of the arrow in the figure) by being pushed by the syrup fed from the syrup inflow / outlet 18b through the three-way valve 21b. At that time, the syrup in the cylinder left chamber 18L is pushed out from the syrup outflow / inlet 18a and is sent out through the three-way valve 21a.

When the piston 19 reaches the left end and the magnetic sensor 20a detects the approach of the magnetic member 19a, the three-way valves 21a and 21b are switched again to the position shown in FIG. , Such an operation is repeated. When the magnetic sensors 20a and 20b detect the proximity of the magnetic member 19a and output a detection signal to the supply control unit 100, the supply control unit 100
a, 21b, and the magnetic sensor 2
Since the supply control unit 100 detects that the number of detections of 0a and 20b has reached the number of times necessary to supply a predetermined amount of syrup, and the supply of the syrup is stopped, the viscosity is high, and Viscosity changes easily with temperature, and even when using syrups with different viscosities depending on the type,
An accurate syrup amount can be sent out, and a beverage having an appropriate dilution ratio can always be supplied to the multi-valve 17 in the shortest time.

FIG. 5 is an operation timing chart of the beverage supply device. For example, as shown in FIG. 5 (a), when the syrup is diluted with carbonated water, the carbonated water electromagnetic valve 12 is opened at time T0 and then delayed by T (for example, about 0.2 seconds), and then the syrup meter 16 is diluted. (The three-way valve 21a, 2
1b, the switching time T1). The reason for delaying the operation of the syrup meter 16 is that when the carbonated water electromagnetic valve 12 and the syrup meter 16 are simultaneously operated, the discharge pressure of the syrup meter 16 is orders of magnitude higher than the pressure of the carbon dioxide gas in the carbonator 8. This is because the syrup enters the cup before the carbonated water, and the syrup accumulates at the bottom of the cup.

Thereafter, while the carbonated water electromagnetic valve 12 is open, the output pulses of the carbonated water flow meter 9 are counted.
At time T2 when the number of pulses stored in the memory 102 is counted, the carbonated water electromagnetic valve 12 is closed. On the other hand, the number of operations of the syrup meter 16 is counted, and the operation of the syrup meter 16 is stopped at time T3 when the number of times stored in the memory 102 is counted. As a result, a carbonated beverage diluted with a carbonated water at a predetermined dilution ratio is completed in the cup.

Thus, as a syrup measuring means,
Each time the piston 19 moves once, a certain amount of syrup corresponding to the content of the cylinder 18 is reliably sent out.
Since the syrup meter 16 provided with the magnetic sensors 20a and 20b and the magnetic member 19a is used, the viscosity is high, and
Even if a syrup having a viscosity that easily changes depending on the temperature and a viscosity that varies depending on the type is used, an accurate syrup amount can always be supplied. However, in the above method, when the viscosity of the syrup changes, the switching time of the three-way valves 21a and 21b changes, the supply stop time of the syrup to be sent out changes, and the supply stop time of the dilution water and the supply stop time of the syrup change. There is a possibility that both will be displaced and the mixing of both will be insufficient.

FIG. 5B is an operation timing chart when a syrup having a lower viscosity than the syrup shown in the operation timing chart of FIG. 5A is used. A low viscosity syrup has a low resistance and the piston 19
Is fast, the switching time of the three-way valves 21a and 21b is also shorter than T1 as indicated by T4, and the operation of the syrup meter 16 is stopped at the time T5 when the number of times stored in the memory 102 is counted. Then, the supply of the dilution water deviates from the stop time T3, and the mixing of the two becomes insufficient.

Therefore, a motor or the like is driven in the water supply line and the carbonated water supply line based on the data stored in the memory 102 in accordance with the type of the sales switch (the type of the syrup) to supply the water or the carbonated water. 5 is provided with a water amount adjusting valve 5 and a carbonated water amount adjusting valve 10 for adjusting the flow rate each time the product is sold.
As shown in (c), the supply of water or carbonated water is stopped at the same timing T5 as that of the syrup by adjusting the supply of water or carbonated water at the same time as the syrup meter 16 stops supplying syrup. .

For example, when a sale of a cola is instructed from the sale switch 60, the carbonated water electromagnetic valve 12 is first opened, and the carbonated water is supplied from the carbonator 8 to the multi-valve 17.
Begin to be supplied to. At this time, a pulse is output from the carbonated water flow meter 9 in accordance with the flow rate of the carbonated water. The supply control unit 100 counts the pulse signal, and closes the carbonated water electromagnetic valve 12 when the count value reaches an amount corresponding to the designated cup size among large, medium, and small.

On the other hand, when the carbonated water electromagnetic valve 12 is opened and carbonated water is supplied from the carbonator 8 to the multi-valve 17,
T (for example, about 0.2 seconds)
The syrup meter 16 stored in 2 operates and the syrup of the cola is supplied from the syrup tank 14 of the cola to the multi-valve 17. And multi valve 17
The cola syrup and carbonated water are mixed together and poured into a cup.

As described above, the cylinder 18 having the two outflow ports 18a and 18b at both closed ends, and the reciprocating movement of the inside of the cylinder 18, the fixed amount of syrup is formed at the two outflow ports 18a and 18b. Syrup meter 1 consisting of a piston 19 for inflow and outflow of water
6 and a multi-valve 17 that mixes the syrup from the syrup meter 16 with the dilution water and supplies the mixed water as drinking water.
8, a magnetic sensor 20a for detecting that it has moved to both ends,
20b, and a supply control unit 100 that outputs a control signal for switching the moving direction of the piston 19 according to the detection output of the magnetic sensors 20a and 20b.
Even when using a syrup having a high viscosity and a viscosity that easily changes depending on the temperature, and the viscosity varies depending on the type, the piston 19 is completely moved from one end of the cylinder 18 to the other end, and an accurate syrup is obtained. Since the amount can be delivered, a beverage having an appropriate dilution ratio can always be supplied to the multi-valve in the shortest time.

The syrup meter 16 has two outlets 1
The supply control unit 100 includes three-way valves 21a and 21b that prevent the syrup from flowing when the syrups 8a and 18b flow out, and prevent the syrups from flowing when the two syrups flow in the syrups.
By controlling the opening and closing of the three-way valves 21a and 21b using the control signal, the syrup can be reliably sent out by switching the moving direction of the piston 19.

The position sensor includes a magnetic member 19a provided on the piston 19 and a magnetic member 19a provided on the cylinder 18.
And the magnetic sensors 20a and 20b that detect the proximity of the syrup, it is possible to always send out a fixed amount of syrup even if the viscosity of the syrup changes.

Dilution water supply lines 22 and 23 for supplying the dilution water to the multi-valve 17 are used for supplying or stopping the water flow meter 4 and the carbonated water flow meter 9 for detecting the flow rate of the dilution water. The supply control unit 100 has the water solenoid valve 6 and the carbonated water solenoid valve 12 based on the output pulses of the water flow meter 4 and the carbonated water flow meter 9. , It is possible to always supply a constant amount of dilution water.

Each of the dilution water supply lines 22 and 23 has
By having the water amount adjusting valve 5 and the carbonated water amount adjusting valve 10 for adjusting the flow rate of the dilution water according to the viscosity of the syrup, it becomes possible to stop the supply of the dilution water in synchronization with the stop of the supply of the syrup.

Water flow meter 4, carbonated water flow meter 9
The supply control unit 100 controls the opening / closing of the water solenoid valve 6 and the carbonated water solenoid valve 12 based on the number of pulses from the memory 102, so that the dilution water is stored. Even if the flow velocity of fluctuates,
It is possible to reliably supply a predetermined amount of dilution water.

[0047]

According to the present invention, a sliding body of a sliding body type constant volume pump for delivering a liquid raw material of a beverage supply apparatus for supplying a beverage by diluting a liquid raw material with dilution water such as water or carbonated water. A magnetic sensor is provided on the magnetic member and the cylinder, and when the magnetic sensor detects the proximity of the magnetic member, the valve means is switched between open and closed, so that the viscosity is high, and the viscosity is easily changed by temperature. Even if a different liquid material is used, the sliding body moves completely from one end of the cylinder to the other end, and can deliver the correct amount of liquid material. It can be supplied to the liquid mixing section in the shortest time.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating a beverage supply device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a piston type syrup meter according to the embodiment of the present invention.

FIG. 3 is a diagram showing an operation of a syrup meter using two three-way valves according to the embodiment of the present invention.

FIG. 4 is a control block diagram of the beverage supply device according to the embodiment of the present invention.

FIG. 5 is an operation timing chart of the beverage supply device according to the embodiment of the present invention.

FIG. 6 is a configuration diagram showing a conventional piston type syrup meter.

FIG. 7 is a diagram showing the operation of a conventional syrup meter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water inlet solenoid valve 2 Water pump 4 Water flow meter 5 Water amount adjustment valve 6 Water electromagnetic valve 7 Carbonator water supply electromagnetic valve 8 Carbonator 9 Carbonated water flow meter 10 Carbonated water amount adjustment valve 12 Carbonated water electromagnetic valve 14 Syrup tank 16 Syrup meter 17 Multi Valve 18 Cylinder 18a Outflow port 18b Outflow port 19 Piston 19a Magnetic member 20a Magnetic sensor 20b Magnetic sensor 21a Three-way valve 21b Three-way valve

Claims (6)

[Claims] 1. A cylinder having two outflow ports at both closed ends, and a slide for reciprocatingly moving inside the cylinder so that a fixed amount of liquid material flows in and out of the two outflow ports in a complementary manner. In a beverage supply device comprising: a constant volume pump including a moving body; and a liquid mixing unit configured to mix the liquid raw material and the dilution water from the constant volume pump and supply the mixed water as drinking water. A position sensor that detects movement to both ends, and a control unit that outputs a control signal for switching a moving direction of the sliding body according to a detection output of the position sensor. Beverage supply device. 2. The constant volume pump prevents the liquid material from flowing when the two outflow ports flow out of the liquid material, and prevents the liquid material from flowing out when the two outflow ports flow in the liquid material. The beverage supply device according to claim 1, further comprising a valve unit configured to control the opening and closing of the valve unit using a control signal to switch a moving direction of the sliding body. 3. The magnetic sensor according to claim 1, wherein the position sensor comprises a magnetic member provided on the sliding body, and a magnetic sensor provided on the cylindrical body for detecting proximity of the magnetic member. A beverage supply device according to claim 1. 4. A diluting water supply line for supplying diluting water to the liquid mixing section has a flow meter for detecting a flow rate of diluting water, and a supply solenoid valve for supplying or stopping the diluting water, 4. The beverage supply device according to claim 1, wherein the control unit controls opening and closing of the supply solenoid valve based on a count output of the flow meter. 5. 5. The beverage supply device according to claim 4, wherein the dilution water supply line has a flow rate adjusting unit that adjusts a flow rate of the dilution water according to a viscosity of the liquid raw material. 6. A memory unit for storing a flow count value counted by the flow meter, wherein the control unit controls opening and closing of the supply solenoid valve based on the flow count value from the memory unit. The beverage supply device according to claim 4 or 5, wherein: