JPH09173802A - Gas feeder for pushing out carbonated drink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent impure gas remaining in the inside of a nitrogen gas generator from being supplied to a carbonated drink vessel at time of initial motion of the nitrogen gas generator and to eliminate fear exerting a bad influence on flavor of a carbonated drink. SOLUTION: This gas feeder for pushing out a carbonated drink is constituted so that nitrogen gas supplied from a membrane unit B is mixed with carbon dioxide gas supplied from a carbon dioxide gas cylinder E in the juncture E and the mixed gas of carbon dioxide gas and nitrogen gas is supplied to a draft beer barrel F to push out draft beer filled in the draft beer barrel F and thereby the draft beer is ejected. In this case, a nitrogen gas supply value 12 is connected to a blowdown valve 24 on the way of a nitrogen gas supply pipeline for supplying nitrogen gas generated by the membrane unit B to the juncture Q. A control part I is connected to the nitrogen gas supply valve 12 and the blowdown valve 24 so that the nitrogen gas supply valve 12 is closed and also the blowdown valve 24 is opened to communicate the inside of a nitrogen gas supply pipeline with the atmosphere for a prescribed time just after start of operation for generating nitrogen gas through the membrane unit B. The nitrogen gas supply valve 12 is opened after a prescribed time elapses and supply of nitrogen gas from the membrane unit B to the juncture Q is permitted and the blowdown valve 24 is closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbonated beverage extruding gas supply device for supplying a gas pressure into a large carbonated beverage container in order to pour the carbonated beverage from the large carbonated beverage container. Regarding

[0002]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention Generally, the draft beer is poured into a small container such as a jug from a large container such as a draft barrel or a tank filled with carbonated drink, such as a jug. It is carried out by applying a gas pressure to and pushing the draft beer by the gas pressure.

Carbon dioxide is generally used as the gas supplied to the large container for pouring the draft beer. This is because carbon dioxide gas is originally dissolved in draft beer and there is no possibility of oxidizing draft beer.

The amount of this carbon dioxide gas dissolved in beer is determined by the temperature and pressure conditions. When the carbon dioxide gas is applied to a large container at a pressure equal to or higher than the equilibrium pressure under certain conditions, the pressure causes carbon dioxide gas to beer in the draft beer. This will increase the carbon dioxide content of the draft beer that is melted and poured into a jug or the like.

Since the taste of draft beer varies depending on the content of dissolved carbon dioxide gas, the content of carbon dioxide gas in draft beer is adjusted at the time of factory shipment in consideration of the amount of carbon dioxide gas dissolved at the time of pouring.

However, the environment when pouring draft beer from a large container differs depending on the store, and for example, the large container is cooled in a refrigerator and the tap and the inside of the refrigerator installed at a place away from this refrigerator. In some cases, large beer may be connected to pour draft beer.
High carbon dioxide pressure must be applied to large containers.
In such cases, the required pouring speed (eg 3 l /
In order to obtain (min.), More carbon dioxide gas than is expected will be dissolved in the draft beer to be poured out, which may impair the flavor of draft beer.

In recent years, a method of pouring draft beer using a mixed gas of carbon dioxide gas and nitrogen gas in order to prevent the taste of draft beer from being impaired by the dissolution of carbon dioxide gas during pouring as described above. Has been taken.

[0008] This is because nitrogen gas is inert and hardly dissolved in beer, and there is almost no possibility of affecting the flavor of draft beer. This nitrogen gas may be supplied from a gas cylinder prepared in the same manner as carbon dioxide gas, but in the case of preparing a number of nitrogen gas cylinders together with the carbon dioxide gas cylinder in a beer hole or the like. However, various problems arise in its storage space and handling. Further, since the nitrogen gas is not liquefied and is filled in the gas as it is in the cylinder, the filling amount is small, and therefore, there is a problem that the replacement frequency of the cylinder is increased.

Therefore, since nitrogen gas exists in the air inexhaustibly, it has been considered to connect the nitrogen gas generator to a large container of draft beer to supply the nitrogen gas. Then, in this case, in order to downsize the nitrogen gas generator (downsize the compressor) while maintaining the purity of the nitrogen gas, the generated nitrogen gas or a mixed gas of the nitrogen gas and carbon dioxide gas is temporarily buffered. It is considered to be stored in the container and supplied from this buffer tank to a large container of draft beer.

However, when nitrogen gas is generated by the nitrogen gas generator and the nitrogen gas or the mixed gas of nitrogen gas and carbon dioxide gas is stored in the buffer tank as described above, the nitrogen gas generator is used. The problem that impure gas remaining in the nitrogen gas generator or the buffer tank is supplied to the large container of draft beer at the time of the initial operation of the tank or when the gas supply from the buffer tank is started, which adversely affects the flavor of the draft beer. Is coming.

The present invention has been made in order to solve the problem in the case of pouring a carbonated beverage from a large carbonated beverage container using the above nitrogen gas. That is, the present invention prevents the impure gas remaining in the nitrogen gas generator or the buffer tank from being supplied to the large carbonated beverage container during the initial operation of the nitrogen gas generator or when the gas supply from the buffer tank is started. An object of the present invention is to provide a gas supply device for extruding a carbonated beverage, which does not have a bad influence on the flavor of the carbonated beverage.

[0012]

In order to achieve the above object, the gas supply apparatus for extruding a carbonated beverage according to the first invention is supplied from a carbon dioxide gas supply source and a nitrogen gas supply source. Mixing nitrogen gas in the gas mixing section, supplying a mixed gas of this carbon dioxide gas and nitrogen gas to a carbonated beverage container and extruding the carbonated beverage filled in this carbonated beverage container for extruding a carbonated beverage In the gas supply device, the nitrogen gas supply source has a nitrogen gas generating member that separates the nitrogen gas from the compressed air, and the nitrogen gas generated by this nitrogen gas generating member is supplied to the gas mixing section in the middle of the nitrogen gas supply pipe. , A blow valve that opens and closes the inside of the nitrogen gas supply pipe to open and close to the atmosphere, and a nitrogen gas supply valve that opens and closes the nitrogen gas supply pipe downstream of the blow valve are connected. , The nitrogen gas supply valve and the blow valve, for a predetermined time immediately after the start of the nitrogen gas generation operation by the nitrogen gas generation member, close the nitrogen gas supply valve and open the blow valve to communicate the inside of the nitrogen gas supply pipe with the atmosphere, It is characterized in that a control means is connected to open the nitrogen gas supply valve after a predetermined time to allow the nitrogen gas generation member to supply the nitrogen gas to the gas mixing section and to close the blow valve.

In the gas supply device for extruding a carbonated beverage according to the first aspect of the invention, when the nitrogen gas generated by the nitrogen gas generating member of the nitrogen gas supply source is supplied to the gas mixing section through the nitrogen gas supply pipe, The control means closes the nitrogen gas supply valve for a predetermined time immediately after the start of the nitrogen gas generation operation by the nitrogen gas generation member to shut off the supply of nitrogen gas from the nitrogen gas generation member to the gas mixing section, and opens the blow valve. To connect the inside of the nitrogen gas supply pipe to the atmosphere.

As a result, the gas initially supplied from the nitrogen gas generating member immediately after the operation of the nitrogen gas generating member is not supplied to the gas mixing section, but is discharged into the atmosphere through the blow valve. As a result, the air accumulated inside the nitrogen gas generating member while the nitrogen gas generating member is stopped, that is, the impure gas that is not pure nitrogen, is not supplied to the gas mixing section and is released into the atmosphere within a predetermined time. To be done.

After a lapse of a predetermined time from the start of operation of the nitrogen gas generating member, the blow valve is closed and the release of gas from the nitrogen gas generating member is shut off. Then, the nitrogen gas supply valve is opened to allow the nitrogen gas generation member to supply the nitrogen gas to the gas mixing section, and the gas mixing section mixes with the carbon dioxide gas supplied from the carbon dioxide gas supply source at a predetermined ratio. To be done. This mixed gas is supplied to a carbonated beverage container, and the carbonated beverage filled in this carbonated beverage container is extruded and poured out.

As described above, according to the gas supply device for extruding a carbonated beverage according to the first aspect of the present invention, when the nitrogen gas generating member is activated, the nitrogen gas generating member accumulates inside the nitrogen gas generating member while the nitrogen gas generating member is stopped. The impure gas that was not pure nitrogen was released into the atmosphere, and the supply to the gas mixing section was cut off, so that only pure nitrogen gas was supplied to the gas mixing section, whereby it was poured out from the carbonated beverage container. There is no fear that the taste of the carbonated beverage will change due to nitrogen gas and impure gases other than carbon dioxide.

In order to achieve the above object, the gas supply device for extruding a carbonated beverage according to the second invention gas-mixes carbon dioxide gas supplied from a carbon dioxide gas supply source and nitrogen gas supplied from a nitrogen gas supply source. The mixed gas of the carbon dioxide gas and the nitrogen gas is stored in the mixed gas tank and then supplied to the carbonated beverage container from this mixed gas tank, and the carbonated beverage filled in the carbonated beverage container is extruded by pushing out. In a carbonated beverage extruding gas supply device, a tank blow that opens and closes the inside of the mixed gas supply pipe to the atmosphere in the middle of the mixed gas supply pipe that supplies the mixed gas of carbon dioxide gas and nitrogen gas from the mixed gas tank to the carbonated drink container A valve is connected and the tank blow valve is opened for a predetermined time immediately after the supply of the mixed gas to the mixed gas tank is started. The mixed gas supply in the pipe is communicated with the atmosphere Te, is characterized by control means for closing the tank blow valve after a predetermined time has elapsed is connected.

In the carbonated beverage extruding gas supply device according to the second aspect of the present invention, when the mixed gas is supplied to the carbonated beverage container from the mixed gas tank for storing the mixed gas of the nitrogen gas and the carbon dioxide gas, the control means, Immediately after starting the supply of the mixed gas from the mixed gas tank to the carbonated beverage container, the tank blow valve is opened to connect the mixed gas supply pipe for supplying the mixed gas from the mixed gas tank to the carbonated beverage container to the atmosphere,
The gas that first flows out of the mixed gas tank is released into the atmosphere.

As a result, when an impure gas other than the mixed gas of nitrogen gas and carbon dioxide is accumulated in the mixed gas tank, this impure gas is not released into the atmosphere and supplied to the carbonated beverage container.

After a predetermined time period during which the impure gas in the mixed gas tank is completely discharged into the atmosphere, the tank blow valve is closed and the communication between the mixed gas supply pipe and the atmosphere is cut off, whereby the mixed gas tank is closed. After that, a mixed gas of pure nitrogen gas and carbon dioxide gas, which has been charged, is supplied.

As described above, according to the gas supply device for extruding carbonated beverages of the second invention, the mixed gas of nitrogen gas and carbon dioxide gas is once stored in the mixed gas tank, and then the mixed gas tank is changed to the carbonated beverage container. When supplied, the gas initially supplied to the carbonated beverage container side from this mixed gas tank is not supplied to the carbonated beverage container and is released into the atmosphere. In the initial state, even if an impure gas that is not a mixed gas of nitrogen gas and carbon dioxide is accumulated in the mixed gas tank, the impure gas is supplied to the carbonated beverage container and the carbon dioxide discharged from the carbonated beverage container is supplied. There is no risk of adversely affecting the taste of the beverage.

In order to achieve the above object, a gas supply device for extruding a carbonated beverage according to a third aspect of the present invention is the same as the second aspect, except that the nitrogen gas supply source separates nitrogen gas from compressed air. A blow valve which has a gas generating member and which opens and closes the inside of the nitrogen gas supply pipe to the atmosphere in the middle of the nitrogen gas supply pipe for supplying the nitrogen gas generated by the nitrogen gas generating member to the mixed gas tank. A nitrogen gas supply valve that opens and closes the nitrogen gas supply pipe is connected downstream of the blow valve, and the control means is connected to the nitrogen gas supply valve and the blow valve, and the control means causes the nitrogen gas generation member to generate nitrogen gas. Immediately after the start of operation, the nitrogen gas supply valve is closed and the blow valve is opened to communicate the inside of the nitrogen gas supply pipe with the atmosphere for a predetermined time, and after the predetermined time has elapsed, the nitrogen gas supply valve It is characterized by closing the blow valve while permitting supply of the nitrogen gas to the mixing tank from the nitrogen gas generating member is opened.

In the gas supply device for extruding a carbonated beverage according to the third aspect of the invention, when the nitrogen gas generated by the nitrogen gas generating member of the nitrogen gas supply source is supplied to the gas mixing section through the nitrogen gas supply pipe, The control means closes the nitrogen gas supply valve for a predetermined time immediately after the start of the nitrogen gas generation operation by the nitrogen gas generation member to shut off the supply of nitrogen gas from the nitrogen gas generation member to the gas mixing section, and opens the blow valve. To connect the inside of the nitrogen gas supply pipe to the atmosphere.

As a result, the gas initially supplied from the nitrogen gas generating member immediately after the operation of the nitrogen gas generating member is not supplied to the gas mixing section, but is discharged into the atmosphere through the blow valve. As a result, the air accumulated inside the nitrogen gas generating member while the nitrogen gas generating member is stopped, that is, the impure gas that is not pure nitrogen, is not supplied to the gas mixing section and is released into the atmosphere within a predetermined time. To be done.

When a predetermined time has passed from the start of operation of the nitrogen gas generating member, the blow valve is closed and the release of gas from the nitrogen gas generating member is shut off. Then, the nitrogen gas supply valve is opened to allow the nitrogen gas generation member to supply the nitrogen gas to the gas mixing section, and the gas mixing section mixes with the carbon dioxide gas supplied from the carbon dioxide gas supply source at a predetermined ratio. To be done.

As described above, according to the gas supply device for extruding a carbonated beverage of the third invention, the impure gas in the mixed gas tank is released into the atmosphere immediately after the supply of the mixed gas from the mixed gas tank to the carbonated beverage container is started. At the same time as the operation of the nitrogen gas generating member is released, the impure gas other than pure nitrogen accumulated inside the nitrogen gas generating member during the stop of the nitrogen gas generating member is released into the atmosphere to the gas mixing section. By shutting off the supply, only pure nitrogen gas is supplied to the gas mixing section.

This eliminates the risk of impure gas being supplied from the nitrogen gas generating member and the mixed gas tank at the start of operation of the carbonated beverage pushing gas supply device. There is no fear that the taste will be changed by impure gases other than gas and carbon dioxide.

In order to achieve the above-mentioned object, a gas supply device for extruding a carbonated beverage according to a fourth aspect of the present invention stores nitrogen gas supplied from a nitrogen gas supply source in a nitrogen tank and then supplies the nitrogen gas from the nitrogen tank. The mixture was supplied to the gas mixing section, mixed with the carbon dioxide gas supplied from the carbon dioxide gas supply source in this gas mixing section, and the mixed gas of this carbon dioxide gas and nitrogen gas was supplied to the carbonated beverage container to fill the carbonated beverage container. In a gas supply device for extruding a carbonated drink by extruding a carbonated drink, in the first nitrogen gas supply pipe for supplying nitrogen gas from a nitrogen tank to a gas mixing section, the inside of the first nitrogen gas supply pipe is exposed to the atmosphere. And a first nitrogen gas supply valve that opens and closes the first nitrogen gas supply pipe downstream of the tank blow valve are connected to each other. A hydrogen gas supply valve and the tank blow valve,
Immediately after starting the supply of nitrogen gas from the nitrogen tank to the gas mixing section, the first nitrogen gas supply valve is closed and the tank blow valve is opened to communicate the inside of the first nitrogen gas supply pipe with the atmosphere for a predetermined time, and after a predetermined time has elapsed. A control means for opening the first nitrogen gas supply valve to allow the supply of nitrogen gas from the nitrogen tank to the gas mixing section and for closing the tank blow valve is connected.

In the gas supply device for extruding a carbonated beverage according to the fourth aspect of the present invention, when the nitrogen gas is supplied from the nitrogen tank to the gas mixing section and mixed with the carbon dioxide gas, the control means controls the nitrogen tank to the gas mixing section. Immediately after the start of the nitrogen gas supply, the first nitrogen gas supply valve is closed to cut off the gas supply from the nitrogen tank to the gas mixing section, and the tank blow valve is opened to change the nitrogen tank to the gas mixing section. By connecting the first nitrogen gas supply pipe for supplying the nitrogen gas to the atmosphere, the gas first discharged from the nitrogen tank is released to the atmosphere.

As a result, when an impure gas other than nitrogen gas is accumulated in the nitrogen tank, this impure gas is not released into the atmosphere and supplied to the gas mixing section.
Then, after a predetermined time in which the impure gas in the nitrogen tank is completely released into the atmosphere, the first nitrogen gas supply valve is opened to allow the supply of the nitrogen gas from the nitrogen tank to the gas mixing section, By closing the tank blow valve to cut off the communication between the first nitrogen gas supply pipe and the atmosphere, pure nitrogen gas, which is subsequently filled in the nitrogen tank, is supplied to the gas mixing section.

As described above, according to the gas supply device for extruding carbonated beverages of the fourth invention, when nitrogen gas is once stored in the nitrogen tank and then supplied from the nitrogen tank to the gas mixing section, The gas initially supplied from the nitrogen tank to the gas mixing section side is not supplied to the gas mixing section and is released into the atmosphere. Even if impure gas other than nitrogen gas is accumulated in the tank, this impure gas is supplied to the gas mixing section, and further supplied to the carbonated beverage container, and the taste of the carbonated beverage that is poured out from this carbonated beverage container. There is no risk of adversely affecting the.

In order to achieve the above object, in the gas supply device for extruding a carbonated beverage according to the fifth invention, in addition to the structure of the fourth invention, a nitrogen gas supply source separates nitrogen gas from compressed air. The second nitrogen gas supply pipe has a gas generating member, and the inside of the second nitrogen gas supply pipe is openably and closably connected to the atmosphere in the middle of the second nitrogen gas supply pipe for supplying the nitrogen gas generated by the nitrogen gas generating member to the nitrogen tank. A blow valve and a second nitrogen gas supply valve for opening and closing the second nitrogen gas supply pipe are connected to the downstream side of the blow valve, and a control means is connected to the second nitrogen gas supply valve and the blow valve to control the control. The means closes the second nitrogen gas supply valve and opens the blow valve to make the inside of the second nitrogen gas supply pipe communicate with the atmosphere for a predetermined time immediately after the start of the nitrogen gas generation operation by the nitrogen gas generation member, It is characterized by closing the blow valve with after lapse between opening the second nitrogen gas supply valve to allow the supply of the nitrogen gas to the nitrogen tank from the nitrogen gas generating member.

In the gas supply device for extruding a carbonated beverage according to the fifth aspect of the present invention, when the nitrogen gas generated by the nitrogen gas generating member of the nitrogen gas supply source is supplied to the nitrogen tank through the second nitrogen gas supply pipe. The control means closes the second nitrogen gas supply valve for a predetermined time immediately after the start of the nitrogen gas generation operation by the nitrogen gas generation member to shut off the supply of nitrogen gas from the nitrogen gas generation member to the nitrogen tank, and also to turn on the blow valve. It is opened to communicate the inside of the second nitrogen gas supply pipe with the atmosphere.

As a result, the gas initially supplied from the nitrogen gas generating member immediately after the operation of the nitrogen gas generating member is not supplied to the nitrogen tank but is discharged into the atmosphere via the blow valve. As a result, the air accumulated inside the nitrogen gas generating member while the nitrogen gas generating member is stopped, that is, the impure gas that is not pure nitrogen, is not supplied to the nitrogen tank and is all released to the atmosphere within the predetermined time. To be done.

Then, after a lapse of a predetermined time from the start of operation of the nitrogen gas generating member, the blow valve is closed and the release of gas from the nitrogen gas generating member is shut off. And the second
The nitrogen gas supply valve is opened to allow the nitrogen gas supply member to supply the nitrogen gas to the nitrogen tank, and the nitrogen tank is filled with pure nitrogen gas.

As described above, according to the gas supply device for extruding a carbonated beverage of the fifth invention, the impure gas in the nitrogen tank is released into the atmosphere immediately after the supply of the nitrogen gas from the nitrogen tank to the gas mixing section is started. When the nitrogen gas generating member is started to operate, the impure gas other than pure nitrogen accumulated inside the nitrogen gas generating member is released to the atmosphere when the nitrogen gas generating member is stopped and is supplied to the nitrogen tank. By shutting off, the nitrogen tank is filled with pure nitrogen gas only.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention will be described below with reference to the drawings.

In FIG. 1, A is a gas mixing unit for mixing carbon dioxide gas and nitrogen gas at a predetermined ratio, B is a membrane unit for generating nitrogen gas from air, C is a compressor unit, and D is carbon dioxide and nitrogen gas. A buffer tank for storing the mixed gas, E is a carbon dioxide gas cylinder, F is a draft beer barrel, G is a dispensing head, H is a tap for pouring draft beer into a jug or the like, and I is a control unit.

The compressor unit C includes a compressor 2 that sucks air through the filter 1 and compresses the air, and a cooling coil 3 that cools the compressed air from the compressor 2. A back pressure relief valve 7 that releases compressed air to the atmosphere via a silencer 6a is connected and inserted between the compressor 2 and the cooling coil 3.

A filter 9 for removing water is connected to the discharge side of the cooling coil 3, and an electromagnetic valve 8 for discharging the water to the drain is connected to the filter 9. Further, on the downstream side of the filter 9, a pressure gauge 4, a back pressure valve 5 for discharging the compressed air introduced into the pressure gauge 4 side to the atmosphere, and a silencer 6b are connected.

The membrane unit B comprises a membrane module 11 for separating nitrogen gas from compressed air, and compressed air is supplied from the compressor unit C to the membrane module 11 via the filter 10. The filter 10 is connected to the drain outlet.

As shown in FIG. 2, the membrane module 11 separates nitrogen gas in the air by utilizing the difference in the membrane permeation rate of the gas that permeates the hollow fiber membrane 11B contained in the casing 11A. Of the air introduced from the port 11C, nitrogen gas having a slow membrane permeation rate flows out from the port 11D, and oxygen-enriched air from which nitrogen gas has been separated is discharged from the port 11E. .

The gas mixing unit A mixes the nitrogen gas generated in the membrane unit B with the carbon dioxide gas supplied from the carbon dioxide gas cylinder E via the pressure adjusting valve E1, and the connection port P1 of the membrane unit B is mixed. Check valve 14, a nitrogen gas pressure adjusting valve 16, a nitrogen gas supply valve 12, a nitrogen gas constant flow valve 18, a nitrogen gas flow meter 19 in this order from the connection port P1 side. And the check valve 20 is connected.

A blow valve 24 is connected between the connection port P1 and the check valve 14 so that the gas supplied from the connection port P1 is released into the atmosphere via the constant flow valve 25 and the silencer 26. It has become. Further, between the nitrogen gas pressure adjusting valve 16 and the nitrogen gas supply valve 12,
The pressure gauge 17 is connected.

Between the connection port P3 of the carbon dioxide gas cylinder E and the output port P2 to the buffer tank D, the carbon dioxide gas supply valve 27, the carbon dioxide gas constant flow valve 21, and the carbon dioxide gas flow meter 22 are sequentially arranged from the connection port P3 side. And the check valve 23 is connected.

The downstream side of the check valve 20 on the nitrogen supply side and the downstream side of the check valve 23 on the carbon dioxide gas supply side meet at a merging point Q on the upstream side of the output port P2. The pressure switch PS is connected between the output port P2 and the output port P2.

The pressure switch PS is turned on when the pressure in the buffer tank D is below a predetermined value, and turned off when it is above a predetermined value. Gas mixing unit A
Is connected to the inflow side of the buffer tank D, and the outflow side of the buffer tank D is connected to the connection port P4 to which the draft beer barrel F is connected via the mixed gas pressure adjusting valve 32 and the filter 28. It is connected.

The dispensing head G is connected to the connection port P4.
Is connected, and this dispensing head G is a draft beer barrel F
By supplying a mixed gas of nitrogen gas and carbon dioxide gas from the buffer tank D as described later, the draft beer is poured from the tap H.

Compressor 2, back pressure relief valve 7, blow valve 2
4, a control unit I is connected to the nitrogen gas supply valve 12, the nitrogen gas supply valve 27 and the pressure switch PS, and the control unit I receives a pressure detection signal from the pressure switch PS and receives a back pressure relief valve. 7, blow valve 24, nitrogen gas supply valve 1
2 and the opening / closing control of the carbon dioxide gas supply valve 27 and the drive control of the compressor 2.

Next, the operation of the gas supply device for extruding a carbonated beverage will be described with reference to the flow chart shown in FIG. The control unit I determines whether or not the power supply of the carbonated beverage extruding gas supply device is turned on (step 1), and when the power supply is turned on, the blow valve 24 and the carbon dioxide gas are stopped while the compressor 2 is stopped. Supply valve 27, nitrogen gas supply valve 12
And the back pressure relief valve 7 are closed, and the control unit I
The blow timer and the back pressure relief timer built in are reset (step 2).

Thereafter, it is judged whether or not the pressure switch PS is turned on (step 3), and the pressure switch PS
Is turned on, that is, when the pressure in the buffer tank D is lower than a predetermined value, the back pressure release timer is turned on and the back pressure release valve 7 is opened (step 4).

When the pressure switch PS is off, the buffer tank D is already filled with the mixed gas of a predetermined pressure or higher, so that the following operation is not performed even when the power is turned on, and therefore the compressor is not operated. 2 is not driven.

Next, it is judged whether or not the back pressure relief timer has timed out (step 5). When the back pressure relief timer has timed out, the driving of the compressor 2 is started and the back pressure relief valve 7 is closed. At the same time, the blow timer is turned on and the blow valve 24 is opened (step 6).

In the above description, the back pressure relief valve 7 is opened before the compressor 2 is started because the pressure inside the compressor 2 is released to the atmosphere through the back pressure relief valve 7 in advance so that the compressor 2 is started. This is to protect the compressor 2 from the shock.

After the blow timer is turned on, it is judged whether or not the blow timer is up (step 7). When the blow timer is up, the blow valve 24 is closed and the nitrogen gas supply valve 12 and The carbon dioxide gas supply valve 27 is opened (step 8).

In the above description, the gas supplied from the membrane unit B through the connection port P1 is supplied to the constant flow valve by opening the blow valve 24 for a predetermined time (the time set by the blow timer) after the start of driving the compressor 2. It is released into the atmosphere via 25 and silencer 26. This is because when the gas supplied from the membrane unit B is introduced into the buffer tank D at the same time when the driving of the compressor 2 is started, the membrane module 1 of the membrane unit B is stopped while the compressor 2 is stopped.
This is because the air filled in 1, that is, the gas that is not pure nitrogen is introduced into the buffer tank D. Therefore, the blow timer of the control unit I is set so as to secure a sufficient time until the air in the membrane module 11 is completely removed and the pure nitrogen gas is supplied.

When the blow timer times out, the blow valve 24 is closed and the nitrogen gas supply valve 12 and the carbon dioxide gas supply valve 27 are opened, the nitrogen gas supplied from the membrane unit B passes through the check valve 14. Nitrogen gas pressure control valve 16
Flow through the nitrogen gas pressure adjusting valve 16 to a preset pressure, and then the nitrogen gas supply valve 1
2, the nitrogen gas constant flow valve 18, the nitrogen gas flow meter 19 and the check valve 20 are supplied to the junction point Q.

When the carbon dioxide gas supply valve 27 is opened, the carbon dioxide gas adjusted to a predetermined pressure from the carbon dioxide gas cylinder E via the pressure adjusting valve E1 is supplied to the connection port P3.
To carbon dioxide supply valve 27, carbon dioxide constant flow valve 21,
Through the carbon dioxide flowmeter 22 and the check valve 23, the confluence point Q
Is supplied to.

Then, at the confluence Q, the nitrogen gas and the carbon dioxide gas are mixed at a ratio according to their respective pressures (partial pressures), and the mixed gas is filled in the buffer tank D.

The pressure switch PS continuously detects the pressure in the buffer tank D (step 9), and when the pressure in the buffer tank D exceeds a predetermined value due to the filling of the mixed gas, the process proceeds to step 2. Returning, the compressor 2 is stopped, the blow valve 24, the carbon dioxide gas supply valve 27,
The nitrogen gas supply valve 12 and the back pressure relief valve 7 are closed, and the blow timer and back pressure relief timer incorporated in the control unit I are reset. Then, in step 3, when the pressure in the buffer tank D decreases to a predetermined value or less due to the consumption of the mixed gas (the pressure switch PS is turned on), the operation control in step 4 and subsequent steps is performed again, and the buffer tank D is controlled. The filling of the mixed gas is restarted.

As described above, the buffer tank D is always filled with a pressure equal to or higher than a predetermined value, and the mixed gas of nitrogen gas and carbon dioxide gas is adjusted to a predetermined pressure by the mixed gas pressure adjusting valve 32 from the buffer tank D. After that, it is supplied to the draft beer barrel F through the dispensing head G. Then, the draft beer extruded by the mixed gas is supplied to the tap H via the dispensing head G, and is poured from the tap H into a small container such as a jug.

FIG. 4 shows another embodiment of the gas supply device for extruding a carbonated beverage according to the present invention. In addition to the configuration of the gas supply device in FIG. 1, the gas supply device in this embodiment includes a buffer tank D and a mixed gas pressure adjusting valve 32.
And a tank blow valve 29 for releasing the gas in the buffer tank D to the atmosphere are connected. By opening / closing the tank blow valve 29, the gas in the buffer tank D is changed to a fixed valve 30 and a silencer 31. It is designed to be released into the atmosphere via.

The control unit I is connected to the tank blow valve 29 in addition to the case of the control unit I of the gas supply apparatus shown in FIG. 1 so as to open and close the tank blow valve 29.

The other structure of this gas supply device is the same as that of the gas supply device of FIG. 1, and the same reference numerals are given. FIG. 5 is a flowchart showing the operation of the gas supply device for extruding a carbonated beverage of FIG. 4, and the operation of the gas supply device will be described below based on this flowchart.

The control unit I judges whether or not the power supply of the gas supply device is turned on (step 10). When the power supply is turned on, the blow valve 24 and the carbon dioxide gas supply are performed while the compressor 2 is stopped. The valve 27, the nitrogen gas supply valve 12, the back pressure release valve 7 and the tank blow valve 29 are closed, and the blow timer, tank blow timer and back pressure release timer incorporated in the control unit I are all reset (step 11). ).

Next, it is judged whether or not the operation of the gas supply device after the power is turned on is the initial operation (step 12). This initial operation refers to the first operation after the gas supply device is powered on.

In step 12, if the operation of the gas supply device at that time is not the initial operation, that is, if the compressor 2 is already repeatedly driven after the power is turned on, the buffer tank D is Since the mixed gas of nitrogen gas and carbon dioxide gas is filled, it is judged whether or not the pressure switch PS is turned on (step 13) as in the gas supply device of FIG. When PS is on, that is, when the pressure in the buffer tank D is lower than a predetermined value,
The back pressure relief timer is turned on and the back pressure relief valve 7 is opened (step 14).

Next, it is judged whether or not the back pressure relief timer has timed out (step 15). When the back pressure relief timer has timed out, the driving of the compressor 2 is started and the back pressure relief valve 7 is closed. At the same time, the blow timer is turned on to open the blow valve 24 (step 16).

In the above description, the reason why the back pressure relief valve 7 is opened before starting the compressor 2 is to protect the compressor 2 at the time of starting, as in the case of the gas supply device of FIG.

After the blow timer is turned on, it is judged whether or not the blow timer has timed out (step 17). When the blow timer has timed up, the blow valve 24 is closed and the nitrogen gas supply valve 12 and the carbon dioxide are discharged. The gas supply valve 27 is opened (step 18).

In the above, the blow valve 24 is opened for a predetermined time (the time set by the blow timer) after the start of driving the compressor 2 so that the gas supplied from the membrane unit B through the connection port P1 is a constant flow valve 25. And is released into the atmosphere through the silencer 26. This is because, as in the case of the gas supply device of FIG. 1, the impure gas remaining in the membrane module 11 is released to the atmosphere while the compressor 2 is stopped.

When the blow timer times out, the blow valve 24 is closed and the nitrogen gas supply valve 12 and the carbon dioxide gas supply valve 27 are opened, the nitrogen gas supplied from the membrane unit B is supplied to the confluence point Q. . Further, by opening the carbon dioxide gas supply valve 27, carbon dioxide gas is supplied from the carbon dioxide gas cylinder E to the confluence point Q.

At the confluence Q, the nitrogen gas and the carbon dioxide gas are mixed at a ratio according to the respective pressures (partial pressures), and the mixed gas is filled in the buffer tank D.

The pressure switch PS continuously detects the pressure in the buffer tank D (step 19), and when the pressure in the buffer tank D exceeds a predetermined value,
Returning to step 11, the driving of the compressor 2 is stopped.

When it is determined in step 12 that the operation of the gas supply device is the initial operation, that is, when the gas supply device is first operated after the power is turned on, the pressure switch PS is further turned on. It is determined whether or not there is (step 20).

This is because when the pressure switch PS is turned on during the initial operation of the gas supply device, the pressure in the buffer tank D is equal to or lower than the predetermined value, so that the impure gas enters the buffer tank D. It is considered that there are cases where Further, when the pressure switch PS is off, it is determined that the mixed gas of nitrogen gas and carbon dioxide gas has already been filled because the pressure in the buffer tank D is equal to or higher than the predetermined value. Is.

Therefore, if the pressure switch PS is off in step 20, the following operation is not performed as in the case where it is determined in step 13 that the pressure switch PS is off.

If the pressure switch PS is turned on in step 20, the back pressure release timer is turned on and the back pressure release valve 7 is opened (step 21). Next, it is judged whether or not the back pressure relief timer has timed out (step 22), and when the back pressure relief timer has timed out, driving of the compressor 2 is started and the back pressure relief valve 7 is closed (step 22). 23). Further, the blow timer is turned on to open the blow valve 24, and the tank blow timer built in the control unit I is turned on to open the tank blow valve 29 (step 24).

Then, it is determined whether or not the blow timer has timed out (step 25), and when the blow timer has timed out, it is next determined whether or not the tank blow timer has timed out (step 26). ), When the blow timer times out, the blow valve 24 and the tank blow valve 29 are closed and the nitrogen gas supply valve 12 and the carbon dioxide gas supply valve 27 are opened (step 27).

In the above, the blow valve 24 is opened for a predetermined time (the time set by the blow timer) after the drive of the compressor 2 is started, as described above, because the impure gas supplied from the membrane unit B through the connection port P1. This is because the gas is released into the atmosphere. The reason why the tank blow valve 29 is opened for a predetermined time (the time set by the tank blow timer) after the driving of the compressor 2 is to release the impure gas remaining in the buffer tank D at the initial operation of the gas supply device. This is because. The blow valve 24 and the tank blow valve 29 are closed due to the increase of the blow timer and the tank blow timer, and the nitrogen gas supply valve 12
When the carbon dioxide gas supply valve 27 is opened, the membrane unit B
And the carbon dioxide gas supplied from the carbon dioxide cylinder E are supplied to the confluence point Q, and at this confluence point Q, the nitrogen gas and the carbon dioxide gas are at their respective pressures (partial pressures).
And mixed in a ratio according to the above, and filled in the buffer tank D.

The pressure in the buffer tank D is continuously detected by the pressure switch PS (step 2
8) When the pressure in the buffer tank D exceeds the predetermined value, the process returns to step 11 and the compressor 2 is stopped.

As described above, in the gas supply device of FIG. 4, when the gas supply device is in the initial operation, in addition to the operation of the gas supply device of FIG. The pure nitrogen gas supply to the draft beer barrel F is ensured by releasing the impure gas.

FIG. 6 shows still another embodiment of the gas supply apparatus for extruding a carbonated beverage according to the present invention.
The gas supply device in this embodiment is shown in FIGS.
The gas supply device of the above is designed to store the mixed gas of nitrogen gas and carbon dioxide gas in the buffer tank, while the nitrogen gas is stored in the buffer tank and the nitrogen gas supplied from this buffer tank is stored. It is designed to be mixed with carbon dioxide.

In FIG. 6, a solenoid valve 40 is connected to the nitrogen gas supply circuit between the connection port P1 of the gas mixing unit A'and the check valve 14 on the downstream side of the connecting portion of the blow valve 24, and the check valve is connected. The downstream side of 14 is connected to the output side buffer tank connection port P5. Further, a pressure switch PS ′ is connected between the check valve 14 and the output side buffer tank connection port P5.

The upstream side of the nitrogen gas pressure adjusting valve 16 is connected to the input side buffer tank connecting port P6, and the nitrogen gas supply valve 44 is provided between the input side buffer tank connecting port P6 and the nitrogen gas pressure adjusting valve 16. Are connected.

Between the nitrogen gas supply valve 44 and the input side buffer tank connection port P6, the gas in the buffer tank J, which will be described later, connected to the output side buffer tank connection port P5 and the input side buffer tank connection port P6 is released to the atmosphere. A tank blow valve 41 for discharging into the inside is connected,
By opening / closing the tank blow valve 41, the gas in the buffer tank J is released into the atmosphere via the metering valve 42 and the silencer 43.

In the structure of the other part of this gas supply device, the confluence point Q is directly connected to the output port P2 through the filter 28, and the carbon dioxide gas is supplied between the connection port P3 and the carbon dioxide gas constant flow valve 21. Similar to the gas supply system of FIG. 1 or 4, except that the gas supply valve is not connected,
The same components are designated by the same reference numerals.

A buffer tank J is connected to the output side buffer tank connection port P5 and the input side buffer tank connection port P6, and the nitrogen gas supplied from the output side buffer tank connection port P5 flows into the buffer tank J. The nitrogen gas filled in the buffer tank J is discharged from the input side buffer tank connection port P6 to the junction point Q side.

The control unit I includes the compressor 2, the back pressure relief valve 7, the blow valve 24, the solenoid valve 40, the tank blow valve 41,
The back pressure relief valve 7, the blow valve 24, the solenoid valve 40, the tank blow valve 41, and the nitrogen gas are connected to the nitrogen gas supply valve 44 and the pressure switch PS ′, and the pressure detection signal from the pressure switch PS ′ is input. The opening / closing control of the supply valve 44 and the drive control of the compressor 2 are performed.

Next, the operation of the carbonated beverage extruding gas supply device will be described with reference to the flowchart shown in FIG. The control unit I determines whether or not the power supply of the carbonated beverage extruding gas supply device is turned on (step 30), and when the power is turned on, the blow valve 24, the solenoid valve while the compressor 2 is stopped. 40, the nitrogen gas supply valve 44, the back pressure release valve 7 and the tank blow valve 41 are closed, and the blow timer, the tank blow timer and the back pressure release timer incorporated in the control unit I are all reset (step 31). .

Next, it is determined whether or not the operation of the gas supply device when the power is turned on is the initial operation (step 32). This initial operation refers to the first operation after turning on the power of the gas supply device.

In step 32, if the operation of the gas supply device at that time is not the initial operation, that is, if the compressor 2 is already driven after the power is turned on, the buffer tank J is filled with nitrogen gas. Then, it is judged whether or not the pressure switch PS is turned on (step 33).
Is on, that is, when the pressure in the buffer tank J is lower than a predetermined value, the back pressure relief timer is turned on and the back pressure relief valve 7 is opened (step 3).
4).

Next, it is judged whether or not the back pressure relief timer has timed out (step 35). When the back pressure relief timer has timed out, driving of the compressor 2 is started and the back pressure relief valve 7 is closed. At the same time, the blow timer is turned on to open the blow valve 24 (step 36).

In the above, the reason why the back pressure relief valve 7 is opened before the start of the compressor 2 is for protection at the start of the compressor 2 as in the case of the gas supply devices of FIGS. 1 and 4.

When the blow timer expires (step 37), the blow valve 24 is closed and the solenoid valve 40 is closed.
And the nitrogen gas supply valve 44 is opened (step 3
8). In the above description, after the driving of the compressor 2 is started, the blow valve 24 is opened for a predetermined time (the time set by the blow timer), and the gas supplied from the membrane unit B through the connection port P1 is released into the atmosphere. 1 and 4
This is because the impure gas remaining in the membrane module 11 is discharged when the compressor 2 is started, as in the case of each gas supply device.

When the blow timer is up, the blow valve 24 is closed, and the electromagnetic valve 40 and the nitrogen gas supply valve 44 are opened, the nitrogen gas supplied from the membrane unit B is released from the check valve 14 and the output buffer. It is flowed into the buffer tank J via the tank connection port P5, and further flows from the buffer tank J to the nitrogen gas pressure adjusting valve 16 via the input side buffer tank connection port P6 and the nitrogen gas supply valve 44, and the nitrogen gas pressure is adjusted. Regulator 16
After being adjusted to a pressure set in advance in (1), it is supplied to the confluence point Q via the nitrogen gas constant flow valve 18, the nitrogen gas flow meter 19 and the check valve 20.

At this confluence point Q, carbon dioxide gas adjusted to a predetermined pressure from a carbon dioxide gas cylinder E via a pressure adjusting valve E1 is supplied from the connection port P3 to the carbon dioxide gas constant flow valve 21, the carbon dioxide gas flow meter 22 and the check valve. It is supplied via the valve 23.

At the confluence Q, the nitrogen gas and the carbon dioxide gas are mixed at a ratio according to their respective pressures (partial pressures) and supplied to the dispense head G via the filter 28 and the output port P2.

The pressure switch PS continuously detects the pressure in the buffer tank J (step 39), and when the pressure in the buffer tank J exceeds a predetermined value, the process returns to step 31 to drive the compressor 2. To stop.
Then, in step 33, when the pressure in the buffer tank J is reduced to a predetermined value or less due to the consumption of nitrogen gas (the pressure switch PS ′ is turned on), step 3 is performed again.
The operation control of 4 or less is performed to fill the buffer tank J with nitrogen gas.

When it is judged in step 32 that the operation of the gas supply device is the initial operation, that is, when the compressor 2 is not driven after the power supply of the gas supply device is turned on, the pressure switch PS 'is turned on next. It is determined whether or not (step 40).

In step 40, the pressure switch PS '
Is off, the following operation is not performed as in the case where the pressure switch PS ′ is off in step 33.

In step 40, the pressure switch PS '
If is on, the back pressure relief timer is turned on and the back pressure relief valve 7 is opened (step 41). When the back pressure release timer times out (step 42), the driving of the compressor 2 is started, the back pressure release valve 7 is closed, and the blow timer is turned on to open the blow valve 24 (step 43).

When the blow timer is up (step 4
4) The blow valve 24 is closed, the electromagnetic valve 40 and the tank blow valve 41 are opened, and the tank blow timer built in the control unit I is turned on (step 45).

When the blow timer times out (step 46), the tank blow valve 41 is closed and the nitrogen gas supply valve 44 is opened (step 47).
In the above description, the blow valve 24 is opened for a predetermined time (the time set by the blow timer) after the start of driving the compressor 2, as described above, because the impure gas remaining in the membrane unit B is released into the atmosphere. This is because the tank blow valve 41 is opened for a predetermined time (the time set by the tank blow timer) after the start of driving the compressor 2 because the impurities remaining in the buffer tank J during the initial operation of the gas supply device. This is because the gas is released into the atmosphere.

When the blow valve 24 and the tank blow valve 41 are closed and the nitrogen gas supply valve 44 is opened due to the time-out of the blow timer and the tank blow timer, as described above, the nitrogen gas supplied from the membrane unit B is supplied. Is filled in the buffer tank J and is supplied to the confluence point Q, and at this confluence point Q, it is mixed with carbon dioxide at a ratio according to each pressure (partial pressure).

As described above, the pressure in the buffer tank J is continuously detected by the pressure switch PS '(step 48), and when the pressure in the buffer tank J becomes equal to or higher than the predetermined value, the step is performed. Return to 11,
The driving of the compressor 2 is stopped.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an example of the best mode of the present invention.

FIG. 2 is a schematic sectional view showing a membrane module in the same example.

FIG. 3 is a flowchart showing the operation of the same example.

FIG. 4 is a circuit diagram showing another example of the best mode of the present invention.

FIG. 5 is a flowchart showing an operation of the example.

FIG. 6 is a perspective view showing still another example of the best mode of the present invention.

FIG. 7 is a flowchart showing the operation of the same example.

[Explanation of symbols]

 A ... Gas mixing unit B ... Membrane unit (nitrogen gas supply source) C ... Compressor unit D ... Buffer tank (mixed gas tank) E ... Carbon dioxide gas cylinder (carbon dioxide gas supply source) F ... Draft beer barrel G ... Dispensing head H ... Tap I ... Control part J ... Buffer tank (nitrogen tank) Q ... Confluence point (gas mixing part) 11 ... Membrane module (nitrogen gas supply member) 12 ... Nitrogen gas supply valve 24 ... Blow valve 29 ... Tank blow valve 40 ... Solenoid valve (No. 2 Nitrogen gas supply valve) 41 ... Tank blow valve 44 ... Nitrogen gas supply valve (first nitrogen gas supply valve)

Claims (5)

[Claims] 1. A carbon dioxide gas supplied from a carbon dioxide gas supply source and a nitrogen gas supplied from a nitrogen gas supply source are mixed in a gas mixing section, and this mixed gas of carbon dioxide gas and nitrogen gas is supplied to a carbonated beverage container. Then, in the carbonated beverage extrusion gas supply device for pouring out by extruding the carbonated beverage filled in the carbonated beverage container, the nitrogen gas supply source has a nitrogen gas generating member for separating nitrogen gas from compressed air In the middle of the nitrogen gas supply pipe for supplying the nitrogen gas generated by the nitrogen gas generating member to the gas mixing section, a blow valve openably and closably connected to the atmosphere in the nitrogen gas supply pipe and a downstream of the blow valve. A nitrogen gas supply valve that opens and closes the nitrogen gas supply pipe is connected on the side, and the nitrogen gas supply valve and the blow valve are connected directly to the start of the nitrogen gas generation operation by the nitrogen gas generation member. After a predetermined time, the nitrogen gas supply valve is closed and the blow valve is opened to communicate the inside of the nitrogen gas supply pipe with the atmosphere, and after a predetermined time elapses, the nitrogen gas supply valve is opened to connect the nitrogen gas generating member to the gas mixing section. A gas supply device for extruding a carbonated beverage, characterized in that a control means for allowing the supply of nitrogen gas and closing the blow valve is connected. 2. A carbon dioxide gas supplied from a carbon dioxide gas supply source and a nitrogen gas supplied from a nitrogen gas supply source are mixed in a gas mixing section, and the mixed gas of carbon dioxide gas and nitrogen gas is stored in a mixed gas tank. After supplying the carbonated beverage container from this mixed gas tank, in the carbonated beverage extrusion gas supply device for pouring out by extruding the carbonated beverage filled in the carbonated beverage container, carbon dioxide gas from the mixed gas tank to the carbonated beverage container and A tank blow valve that connects the inside of the mixed gas supply pipe to the atmosphere in an openable and closable manner is connected in the middle of the mixed gas supply pipe that supplies the mixed gas of nitrogen gas, and the tank blow valve supplies the mixed gas to the mixed gas tank. Immediately after the start of, the tank blow valve is opened to allow the inside of the mixed gas supply pipe to communicate with the atmosphere, and after the predetermined time has elapsed, the tank blow valve is opened. Close control unit is connected, a gas supply device for carbonated beverages extrusion, characterized in that. 3. The nitrogen gas supply source has a nitrogen gas generation member that separates nitrogen gas from compressed air, and the nitrogen gas supply pipe supplies nitrogen gas generated by the nitrogen gas generation member to the mixed gas tank. To
A blow valve that opens and closes the inside of the nitrogen gas supply pipe to open and close to the atmosphere and a nitrogen gas supply valve that opens and closes the nitrogen gas supply pipe downstream of the blow valve are connected, and the control means blows the nitrogen gas supply valve and the blower. Connected to the valve, this control means, for a predetermined time immediately after the start of the nitrogen gas generation operation by the nitrogen gas generating member, closes the nitrogen gas supply valve and opens the blow valve to communicate the inside of the nitrogen gas supply pipe with the atmosphere, The carbonated beverage extruding gas supply device according to claim 2, wherein after a predetermined time has elapsed, the nitrogen gas supply valve is opened to allow the supply of nitrogen gas from the nitrogen gas generating member to the mixed gas tank and the blow valve is closed. 4. A nitrogen gas supplied from a nitrogen gas supply source is stored in a nitrogen tank, and then nitrogen gas is supplied from this nitrogen tank to a gas mixing section, and carbon dioxide supplied from a carbon dioxide gas supply source in this gas mixing section. In a gas supply device for extruding a carbonated beverage, which is mixed with a gas and is supplied by supplying a mixed gas of this carbon dioxide gas and a nitrogen gas to a carbonated drink container to extrude the carbonated drink filled in the carbonated drink container, the nitrogen In the middle of the first nitrogen gas supply pipe for supplying the nitrogen gas from the tank to the gas mixing section, a tank blow valve for communicating the inside of the first nitrogen gas supply pipe with the atmosphere in an openable and closable manner and at a downstream side of the tank blow valve. A first nitrogen gas supply valve for opening and closing the first nitrogen gas supply pipe is connected, and a nitrogen gas from the nitrogen tank to the gas mixing section is connected to the first nitrogen gas supply valve and the tank blow valve. Immediately after the start of supply, the first nitrogen gas supply valve is closed and the tank blow valve is opened to communicate the inside of the first nitrogen gas supply pipe with the atmosphere for a predetermined time, and after the predetermined time has elapsed, the first nitrogen gas supply valve is opened to release nitrogen. A gas supply device for extruding a carbonated beverage, which is connected to a control unit that allows the supply of nitrogen gas from the tank to the gas mixing unit and closes the tank blow valve. 5. The second nitrogen gas supply pipe, wherein the nitrogen gas supply source has a nitrogen gas generation member for separating nitrogen gas from compressed air, and the nitrogen gas generated by the nitrogen gas generation member is supplied to the nitrogen tank. In the middle of
A blow valve that opens and closes the inside of the second nitrogen gas supply pipe so as to be openable and closable, and a second downstream of the blow valve.
A second nitrogen gas supply valve for opening and closing the nitrogen gas supply pipe is connected, the control means is connected to the second nitrogen gas supply valve and the blow valve, and the control means starts the nitrogen gas generation operation by the nitrogen gas generation member. Immediately after the predetermined time, the second nitrogen gas supply valve is closed and the blow valve is opened to communicate the inside of the second nitrogen gas supply pipe with the atmosphere. After a predetermined time has elapsed, the second nitrogen gas supply valve is opened and the nitrogen gas generating member is opened. The gas supply device for extruding a carbonated beverage according to claim 4, wherein the supply of nitrogen gas from the nitrogen tank to the nitrogen tank is allowed and the blow valve is closed.