JP2020130194A - Beverage supply device - Google Patents

Abstract

To provide a beverage supply device that can reliably prevent malfunction of a boiling detection sensor even when steam is returned to a hot water tank from a boiler.SOLUTION: A beverage supply device includes: a heater 40 for heating water to be supplied from a hot water tank 11; and a steam returning pipe 41 connected to a steam returning route for returning surplus steam to the hot water tank 11 from a boiler 73. The steam returning pipe 41 has a lower end opening 42 inside the hot water tank 11 which is arranged lower than a lowermost part of the heater 40.SELECTED DRAWING: Figure 8

Description

The present invention relates to a beverage supply device, and more particularly to a beverage supply device capable of producing milk foam using steam from a boiler.

Conventionally, a beverage supply device capable of providing a coffee beverage such as cappuccino by adding milk foam to coffee or coffee has been known.
In such a beverage supply device, when supplying to a coffee brewer, for example, milk is mixed with air in a miller using steam generated by a once-through steam generator (hereinafter, simply referred to as “boiler”). There is a device that feeds a mixture of whipping and steamed milk, ie milk foam, to a coffee brewer.

Conventionally, such a beverage supply device includes a hot water supply path for supplying hot water from a hot water tank to a boiler, a steam discharge path for discharging steam from a boiler to a milker, and milk from a milk cooler to a milker. A milk supply path for supplying, an air supply path for supplying air to the milker, a steam return path that branches from the steam discharge path to the hot water tank, and steam generated by the boiler is discharged to the milker. A technique is disclosed in which a three-way valve for controlling whether to return to the hot water tank via a steam return path is provided (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-167394

However, in the conventional technique, the steam generated by the boiler is discharged to the milker when the beverage is supplied, and the steam discharged from the boiler is returned to the hot water tank via the steam return path at the end of the beverage supply. There is a problem that the steam returned to the tank does not cool sufficiently and fills the inside of the hot water tank, causing the boiling detection sensor that detects the boiling of the hot water tank to malfunction.

The present invention has been made in view of the above points, and provides a beverage supply device capable of reliably preventing malfunction of the boiling detection sensor even when steam is returned from the boiler to the hot water tank. It is the purpose.

In order to solve the above problems, the present invention includes a hot water tank for storing hot water and a boiler that heats hot water from the hot water tank to generate steam, and discharges the steam generated by the boiler to a milker. Then, in a beverage supply device that mixes air and milk to generate foam milk, a heater that heats the water supplied from the hot water tank and a steam return path that returns excess steam from the boiler to the hot water tank. A steam return pipe to be connected is provided, and the lower end opening of the steam return pipe inside the hot water tank is arranged below the hot water tank.
As a result, the lower end opening of the steam return pipe is located below the bottom of the heater, so steam is released to the place where hot water with a relatively low temperature is stored in the hot water tank, and as a result, the steam is rapidly discharged. It can be cooled to the above, and it is possible to prevent the inside of the hot water tank from being filled with steam.

According to the present invention, since steam is released to a place where hot water having a relatively low temperature is stored in the hot water tank, the steam can be cooled rapidly and the inside of the hot water tank is filled with steam. As a result, it is possible to prevent malfunction due to the boiling detection sensor.

The front view which shows the embodiment of the beverage supply apparatus which concerns on this invention. The front view of the beverage supply device of this embodiment with the front door, side panel, coffee bean canister and the like removed. The plan view of the beverage supply device of this embodiment. The left side view of the beverage supply device of this embodiment. The right side view of the beverage supply device of this embodiment. The partial schematic block diagram of the beverage supply device of this embodiment. The schematic block diagram of the milk former provided in the beverage supply device of this embodiment. The schematic block diagram which shows the hot water tank of this embodiment. FIG. 9A is a graph showing the relationship between the boiler temperature and the temperature detected by the boiling detection sensor and the ambient temperature in the present embodiment, and FIG. 9B is the boiler temperature and the boiling detection sensor by the conventional beverage supply device. A graph showing the relationship between the detected temperature and the ambient temperature.

The first invention includes a hot water tank for storing hot water and a boiler for heating hot water from the hot water tank to generate steam, and the steam generated by the boiler is discharged to a milker to discharge air and milk. In a beverage supply device that mixes to produce foam milk, a heater that heats the water supplied from the hot water tank and a steam return pipe that is connected to a steam return path that returns excess steam from the boiler to the hot water tank. The lower end opening of the steam return pipe inside the hot water tank is arranged below the hot water tank.
According to this, since the lower end opening of the steam return pipe is arranged below the hot water tank, steam is released to the place where hot water having a relatively low temperature is stored in the hot water tank, and as a result, the steam is rapidly discharged. It can be cooled to the above, it is possible to prevent the inside of the hot water tank from being filled with steam, and it is possible to prevent a malfunction due to the boiling detection sensor.

In the second invention, a communication hole is formed in the middle of the steam return pipe and above the upper limit water level of the hot water tank.
According to this, by forming the communication hole, it is possible to prevent the water (hot water) in the hot water tank from flowing back through the steam return pipe, so that the steam is prevented from being sent to the boiler side. Can be done.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of the beverage supply device 1 of the present invention. FIG. 2 is a perspective view of the beverage supply device 1 with the front door 8, the side panel, the coffee bean canister 70, and the like removed. FIG. 3 is a plan view of FIG. FIG. 4 is a left side view of FIG. FIG. 5 is a right side view of FIG. FIG. 6 is a partial schematic configuration diagram of the beverage supply device 1.

The beverage supply device 1 of the present embodiment includes a main body, and on the front surface of the main body, an extraction nozzle 2 for discharging coffee liquid, and a milk nozzle 3 for discharging milk foam, steam milk (hot milk), and cold milk. A nozzle unit 5 provided with a beverage nozzle 4 for discharging a beverage obtained by mixing and stirring a powder material such as cocoa powder as a beverage material and hot water, and a hot water nozzle (not shown) are provided.
A cup support 7 on which a cup for receiving the extracted coffee liquid and other beverages is placed is provided below the nozzle unit 5 and the beverage nozzle 4.

A door 8 rotatably supported on one side is provided on the front surface of the main body 6 so as to be openable and closable. A plurality of beverage selection buttons 9 for selecting the types of beverages that can be provided by the beverage supply device 1 are provided on the front surface of the door 8.
The beverage supply device 1 of the present embodiment includes a hot water tank 11, a hot water pump (gear pump) 12 attached near the bottom of the hot water tank 11, a coffee extractor 30, and a milk former 60 in the main body 6. It has.

Further, in the present embodiment, it is possible to provide not only a coffee beverage obtained by extracting a coffee liquor from ground beans, but also a beverage obtained by mixing and stirring a powder raw material as a beverage raw material and hot water. Therefore, as shown in FIG. 1, a powder raw material storage container 17 for storing the powder raw material is arranged side by side with the coffee bean canisters 70 and 70 in the upper part of the main body 6. As shown in FIG. 2, the main body is provided with a powdered beverage generation unit 18 that produces a beverage by mixing and stirring a predetermined amount of powdered raw material discharged from the powdered raw material storage container 17 and a predetermined amount of hot water. ..

The hot water tank 11 is an open-air tank capable of storing several liters of drinking water. Further, the hot water pump 12 provided near the bottom of the hot water tank 11 (in the present embodiment, the front of the lower part of the hot water tank 11) is a pump that pressurizes and discharges the hot water in the hot water tank 11, and the hot water pump 12 As shown in FIG. 6, a hot water supply pipe 16 in which a filter 13, a flow meter 14, and a hot water supply valve (solenoid valve) 15 are sequentially interposed is connected to the outlet of the hot water supply pipe 16. The end is connected to the hot water supply port of the cylinder 33 constituting the coffee extractor 30.
The details of the hot water tank will be described later.

A drain pipe 19 located between the hot water supply valve 15 and the coffee extractor 30 and branching from the hot water supply pipe 16 is connected to the hot water supply pipe 16. The drain pipe 19 is provided with a drain valve (solenoid valve) 20 for controlling the discharge of residual liquid or the like in the coffee extractor 30 or the coffee liquid pipe 39 described later to the outside.

Further, as shown in FIG. 2, a residue used for extracting coffee liquid is received below the main body, and a residue receiving member provided so as to be freely pulled out forward is accommodated in a state where the door 8 is opened. The slag receiving member accommodating portion 21 formed as described above is provided.
A mill 71 located in the main body 6 and arranged above the coffee brewing machine 30 is provided on the upper part of the main body 6, and the coffee bean canister 70 is detachably attached above the mill 71. The mill 71 grinds coffee beans falling from the coffee bean canister 70 with a crushing blade to obtain ground beans. Further, an exhaust fan 25 for exhausting waste heat in the main body 6 is provided above the hot water tank 11.

The coffee extractor 30 filters the coffee liquor extracted by passing the ground beans supplied from the mill 71 through hot water with a filter. The coffee brewer 30 includes a cylinder unit 31 movably provided by an elevating device 32 and a cap 35 provided above the cylinder unit 31. The cylinder unit 31 is composed of a cylinder 33 having an open upper surface and a water-permeable piston 34 provided in the cylinder 33 so as to be movable up and down (FIG. 6).

A hot water supply pipe 16 is removably connected to the bottom side surface of the cylinder 33. Further, with the cap 35 fitted in the cylinder 33, a coffee liquid extraction chamber is formed in a space surrounded by the lower surface of the cap 35, the inner wall of the cylinder 33, and the upper surface of the piston 34.
An extraction port 50 for coffee liquor extracted in the extraction chamber is formed on the lower surface of the cap 35, and the extraction port 50 is surrounded by a mesh filter (not shown) provided on the lower surface of the cap 35. Further, the extraction port 50 is formed so as to communicate with an extraction path (not shown) formed by penetrating the inside of the cap 35 up and down, and coffee is provided at the coffee liquid extraction portion provided at the upper end of the extraction path. The liquid pipe 39 is connected. An extraction valve (solenoid valve) 52 is interposed in the coffee liquid pipe 39, and an extraction nozzle 2 is connected to the end of the extraction valve (solenoid valve) 52.

When the beverage selection button 9 is operated while the cylinder unit 31 is in the predetermined standby position, the mill 71 is rotationally driven for a predetermined time, and the coffee beans housed in the coffee bean canister 70 are sequentially crushed and ground. As beans, a predetermined amount of ground beans is put into the extraction chamber of the cylinder 33.
Next, the elevating device 32 rises, which also raises the cylinder unit 31, and the lower end of the cap 35 is pushed into the upper opening of the cylinder 33. The ground beans (coffee raw material powder) put into the extraction chamber are sandwiched between the piston 34 located at the inner bottom and the cap 35, and are confined and compressed.

Subsequently, the hot water pump 12 is operated and the hot water supply valve 15 is opened, and hot water is pressurized and supplied from the hot water tank 11 into the cylinder 33. The amount of hot water supplied is detected by the flow meter 14, and when the amount reaches a predetermined amount, the hot water pump 12 is stopped and the hot water supply valve 15 is also closed. At this time, the extraction valve 52 is also energized and opened. Since the extraction valve 52 acts as a so-called resistance valve, the flow path is secured even if the extraction valve 52 is not energized and opened.

As a result, the hot water is pressurized in the process of passing through the extraction chamber to promote the elution of coffee components from the ground beans, and the hot water is further pressurized and supplied, so that the hot water permeates into the tissue of the ground beans. , A strong coffee liquor, i.e. espresso coffee, is obtained. This coffee liquid passes through the inside of the cap 35 from the extraction port 50 formed on the lower surface of the cap 35, and is discharged (sold) from the extraction nozzle 2 via the coffee liquid pipe 39 in which the extraction valve 52 is opened. The coffee liquid is extracted into the cup by placing the cup or the like on the cup support base 7 corresponding to the lower part of the extraction nozzle 2.

Next, the configuration of the milk former 60 will be described with reference to FIG. 7.
FIG. 7 is a schematic configuration diagram of the milk former 60.
The milk former 60 of the present embodiment includes a hot water supply path (piping) 61 for taking out hot water from the hot water tank 11, an electromagnetic pump 72 as a hot water supply control means provided in the hot water supply path 61, and hot water. It is composed of a once-through boiler 73, which is a steam generating means in which a supply path 61 is connected to an inlet, a milker 62, and the like. A steam discharge path (piping) 74 is connected to the outlet of the boiler 73, and the steam discharge path 74 is connected to the milker 62.

The boiler 73 has a built-in electric heater, and heats hot water supplied from the hot water tank 11 through the hot water supply path 61 by the operation of the electromagnetic pump 72 to, for example, about + 170 ° C. to generate steam, and this steam is generated. It is discharged to the milker 62 through the three-way valve 76 (described later) by the steam discharge path 74. A three-way valve (three-way solenoid valve) 76 as a steam flow path control means is attached to the steam discharge path 74, and a common inlet and a normally closed outlet of the three-way valve 76 are interposed in the steam discharge path 74. A steam return path (piping) 77 is connected to the normally open outlet of the three-way valve 76 so as to branch off from the steam discharge path 74. Then, the steam return path 77 reaches the hot water tank 11 and is connected to the inside of the hot water tank 11.

The three-way valve 76 discharges the steam generated by the boiler 73 to the milker 62 in a state of being energized. Further, in the non-energized state, the steam emitted from the boiler 73 is returned to the hot water tank 11 via the steam return path 77.

The milker 62 is composed of a substantially cylindrical main body 63, and a discharge portion 64 that is displaced to either the left or right side of the center and protrudes inside the main body 63 is integrated on the side surface of the main body 63. On the bottom surface of the main body 63, the milk foam generated in the main body 63, the supplied steam milk, or the milk nozzle 3 for discharging (selling) cold milk is integrally formed. There is.

The discharge portion 64 has a substantially cylindrical shape that opens to the left and right, and the end portion of the steam discharge path 74 located on the downstream side of the three-way valve 76 is connected to the end portion 64A on the side opposite to the main body 63 side. To. A milk inflow port 67 communicating with the inside of the discharge part 64 is formed on the lower surface of the discharge part 64, and an air suction port 68 also communicating with the inside of the discharge part 64 is formed on the upper surface of the discharge part 64. There is.

A milk supply path (tube) 79, one end of which is inserted into a milk pack 78 housed in a milk cooler 69, is connected to the milk inflow port 67 of the milker 62. A tube pump 81 as a milk supply control means is attached to the milk supply path 79. The tube pump 81 is a pump that can rotate forward and reverse and / or has a variable rotation speed, and is rotated forward to feed the milk in the milk pack 78 to the milker inflow port 67 of the milker 62. Further, it is rotated in the reverse direction to return the residual milk in the milk supply path 79 to the milk pack 78. The milk cooler 69 keeps the milk pack 78 at a predetermined temperature by a cooler (Peltier element or the like) (not shown).

An air supply path 82 is connected to the air suction port 68 of the milker 62, and an outlet of an air valve 83 as an air supply control means is connected to the other end of the air supply path 82. The inlet side of the air valve 83 is communicated with the atmosphere as an air inlet 84. The air valve 83 opens to the atmosphere through the air inlet 84 in the energized state, and seals the atmosphere in the non-energized state.

Next, the details of the hot water tank will be described.
FIG. 8 is a configuration diagram showing an outline of a hot water tank.
As shown in FIG. 8, the hot water tank 11 is provided with a heater 40 that heats and retains the stored water at, for example, + 97 ° C. The heater 40 is formed in a substantially L shape, and the lower end portion of the heater 40 is arranged at a predetermined interval from the bottom surface of the hot water tank 11.
The heater 40 heats the water stored in the hot water tank 11 to make hot water, and the heater 40 has an L-shaped portion extending in a substantially horizontal direction, which is predetermined with respect to the bottom surface of the hot water tank 11. They are arranged so as to have an interval.

The hot water tank 11 is provided with a steam return pipe 41 connected to a steam return path 77 from the three-way valve 76. The steam return pipe 41 is preferably arranged so that its lower end opening 42 is located below the hot water tank 11. The hot water tank 11 is supplied with relatively cold water such as tap water from the upper side thereof, and water flows in from under the hot water tank 11 through a water supply pipe 48 described later. Therefore, the temperature below the hot water tank 11 is low. Because it is.
The steam returning from the three-way valve 76 to the hot water tank by the steam return pipe 41 via the steam return path (pipe) 77 is preferably cooled at once, and the steam return pipe 41 is placed in a region where the temperature is as low as possible. It is preferable that the lower end opening 42 is arranged.
In the present embodiment, the lower end opening 42 of the steam return pipe 41 is arranged below the hot water tank 11 and further below the lowermost portion of the heater 40. Further, as shown in FIG. 8, the lower end opening 42 of the steam return pipe 41 may be arranged near the outlet of the water supply pipe 48, and the returned steam can be effectively cooled.
A communication hole 43 is formed at a position above the upper limit water level of the hot water tank 11 of the steam return pipe 41.

A float 44 that moves up and down in conjunction with the water level in the hot water tank 11 is provided above the hot water tank 11. A support rod 45 is attached to the upper part of the float 44. A float switch 46 is provided above the hot water tank 11 so that the support rod 45 comes into contact with the float 44.
The float switch 46 includes an upper limit water level switch 46a corresponding to the position of the float 44 at the upper limit water level of the hot water tank 11, and a lower limit water level switch 46b corresponding to the position of the float 44 at the lower limit water level of the hot water tank 11.

The hot water tank 11 is provided with a water pipe 47 for supplying water to the inside of the hot water tank 11. The water pipe 47 is connected to, for example, a water supply. The water pipe 47 supplies a predetermined amount of water to the inside of the hot water tank 11 as needed.
The water supplied from the water pipe 47 flows into the water supply pipe 48 located at the extension of the tip portion on the hot water tank 11 side. Further, the outlet side of the water supply pipe 48 is arranged below the hot water tank 11, and when the amount of hot water in the hot water tank 11 decreases and is supplied from the water pipe 47, the water entering the hot water tank 11 through the water supply pipe 48 is hot water. It will flow from below the tank 11.
The tank side end of the water supply section and the inlet side end of the water supply pipe 48 have a predetermined distance (for example, a distance of 25 mm or more, which is a necessary value between the overflow pipe 55) to prevent backflow of water. It is arranged so as to have it, and the inlet end of the water supply pipe 48 is arranged so as to be located at a position higher than the upper limit water level of the hot water tank 11.

An overflow pipe 55 is connected above the hot water tank 11. The overflow pipe 55 discharges excess hot water when the hot water stored in the hot water tank 11 exceeds the upper limit water level for some reason, and steam generated from the hot water when the hot water in the hot water tank 11 boils. Is to be discharged.
A boiling detection sensor 56 is provided in the middle of the overflow pipe 55. The boiling detection sensor 56 determines whether or not the hot water in the hot water tank 11 is boiling by detecting the steam discharged from the overflow pipe 55.
A hot water supply path (pipe) 61 for sending the hot water of the hot water tank 11 to the boiler 73 is connected to the upper part of the hot water tank 11.

Next, the operation of this embodiment will be described.
In the present embodiment, when producing foam milk, milk is sent from the milk pack 78 to the milk former 60 via the tube pump 81, and hot water is supplied from the hot water tank 11 to the boiler 73 via the electromagnetic pump. , Steamed in the boiler 73 and then sent to the milk former 60, which mixes the milk and the steam to produce foam milk.
Then, the steam that continues to be generated in the boiler 73 even after the production of foam milk is completed is returned to the hot water tank 11 via the steam return path 77.

The steam returned to the hot water tank 11 via the steam return pipe 41 is discharged into the hot water tank 11 from the lower end opening 42 of the steam return pipe 41.
In this case, when the amount of hot water in the hot water tank 11 is reduced and water having a low temperature is just supplied from the water pipe 47 to the hot water tank 11, the water temperature below the hot water tank 11 is lower than that above the upper part. Further, when the hot water in the hot water tank 11 is heated by the heater 40, the water temperature in the hot water tank 11 is higher than that in the heater 40 and lower in the water temperature below the heater 40. In this case, in the present embodiment, since the lower end opening 42 of the steam return pipe 41 is arranged below the lowermost portion of the heater 40, the hot water having a relatively low temperature is stored in the hot water tank 11. Steam will be released.
Therefore, the steam is rapidly cooled, and it is possible to prevent the steam from filling the inside of the hot water tank 11.

The steam sent from the steam return pipe 41 is slightly released into the hot water tank 11 from the communication hole 43 when passing through the communication hole 43, but the communication hole 43 is compared with the lower end opening 42. Since it is formed to have an extremely small diameter, steam does not fill the inside of the hot water tank 11.
Here, when the communication hole 43 is not formed, the steam returned to the hot water tank 11 is cooled at once, and the pressure inside the steam return pipe 41 drops sharply. Therefore, the steam return pipe 41 is the hot water tank 11. The water (hot water) is sucked up, and the sucked water (hot water) flows back to the boiler 73 via the steam return path 77 and the three-way valve 76.
Therefore, by forming the communication hole 43 above the upper limit water level of the hot water tank 11 of the steam return pipe 41, it is possible to prevent the pressure imbalance and cause the water of the hot water tank 11 to flow back to the boiler 73 side. It is preventing.

FIG. 9 is a graph showing the relationship between the boiler temperature, the temperature detected by the boiling detection sensor 56, and the ambient temperature.
FIG. 9A shows the measurement result by the beverage supply device of the present embodiment, and FIG. 9B shows the measurement result by the conventional beverage supply device that releases steam to the upper part of the hot water tank 11. For convenience of explanation, the pulsating portion on the left side of the steam boiler temperature in FIG. 9A is enlarged in time series.
As shown in FIG. 9B, in the conventional beverage supply device, when hot water is supplied from the hot water tank 11 and the boiler 73 is operated in order to provide (sell) the beverage, the temperature of the boiler 73 is slightly reduced. Is reduced to. When steam is returned to the hot water tank 11 by the steam return system every time this beverage is supplied, the inside of the hot water tank 11 is filled with steam, and excess steam flows from the hot water tank 11 through the overflow pipe 55. Is discharged to the outside. When steam is discharged from the overflow pipe 55 in this way, the temperature detected by the boiling detection sensor 56 rises above the boiling detection temperature, which is an arbitrary threshold value, and it is determined that the hot water in the hot water tank 11 is boiling. A malfunction will occur.

On the other hand, in the beverage supply device of the present embodiment, as shown in FIG. 9A, steam from the boiler 73 is supplied (sold) by the steam return system and the steam return pipe 41 in order to provide (sell) the beverage. Even when it is returned to the hot water tank 11, the temperature detected by the steam temperature sensor does not rise. This is because, as described above, steam is discharged to the region of the hot water having a relatively low temperature in the hot water tank 11, so that the steam does not fill the inside of the hot water tank 11 and exceeds the boiling detection temperature. It shows that there is no malfunction.

As described above, in the present embodiment, the steam return connected to the heater 40 for heating the water supplied to the hot water tank 11 and the steam return path for returning the excess steam from the boiler 73 to the hot water tank 11. The lower end opening 42 inside the hot water tank 11 of the steam return pipe 41 including the pipe 41 is located below the hot water tank 11, and is particularly arranged below the lowermost portion of the heater 40.
As a result, the lower end opening 42 of the steam return pipe 41 is located below the hot water tank 11 at a relatively low temperature and below the bottom of the heater 40, so that the temperature of the hot water tank 11 is relatively high. Steam is released to the place where low hot water is stored, and as a result, the steam can be cooled rapidly, and it is possible to prevent the steam from filling the inside of the hot water tank 11, and the boiling detection sensor. It is possible to prevent a malfunction due to 56.

Further, in the present embodiment, a communication hole 43 is formed in the middle of the steam return pipe 41 and above the upper limit water level of the hot water tank 11.
As a result, by forming the communication hole 43, it is possible to prevent the water (hot water) of the hot water tank 11 from flowing back through the steam return pipe 41, so that the water (hot water) of the hot water tank 11 is sent to the boiler 73 side. It is possible to prevent it from being stored.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

As described above, the beverage supply device according to the present invention can be suitably used as a beverage supply device that does not fill the inside of the hot water tank with steam from the boiler and can prevent malfunction by the boiling detection sensor. Is.

1 Beverage supply device 11 Hot water tank 12 Hot water pump 13 Filter 40 Heater 41 Steam return pipe 42 Lower end opening 43 Communication hole 44 Float 45 Support rod 46 Float switch 46a Upper limit water level switch 46b Lower limit water level switch 47 Water pipe 48 Water supply pipe 55 Overflow pipe 56 Boiling detection sensor 60 Milk former 61 Hot water supply path 73 Boiler 77 Steam return path

Claims (2)

A hot water tank for storing hot water and a boiler for heating hot water from the hot water tank to generate steam are provided, steam generated by the boiler is discharged to a milker, and air and milk are mixed to produce foam milk. In the beverage supply device to produce
A heater that heats the water supplied to the hot water tank and
It is provided with a steam return pipe connected to a steam return path for returning excess steam from the boiler to the hot water tank.
A beverage supply device characterized in that the lower end opening of the steam return pipe inside the hot water tank is arranged below the hot water tank. The beverage supply device according to claim 1, wherein a communication hole is formed in the middle of the steam return pipe and above the upper limit water level of the hot water tank.

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