JPH09183495A - Gas supply device for forcing out carbonated drink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas supply device for forcing out carbonated drink whereby gas supply pressure for mixing a nitrogen gas and carbonic acid gas can be adjusted easily without requiring skill and a mixing ratio between the nitrogen gas and carbonic acid gas can be kept at a specific ratio at all times. SOLUTION: Between nitrogen gas supply pipes L4 and L5 for sending nitrogen gas to the meeting point of gases from a compressor unit C and film unit B, this device has a supplied-pressure input port connected to the side of the film unit B, a supplied-pressure output port connected to the side of the meeting point, and a pressure signal input port connected to the side of a carbonic acid gas bomb E, and a nitrogen gas pressure adjustment valve 15 is connected. This nitrogen gas pressure adjustment valve 15 adjusts the pressure of a nitrogen gas supplied to the supplied-pressure input port so that the pressure has a specific ratio to the pressure of a carbonic acid gas input to the pressure signal input port, and then it outputs the gas to the meeting point from the supplied- pressure output port.

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 depending on the temperature and pressure conditions. However, when a carbon dioxide gas pressure equal to or higher than the equilibrium pressure is applied to a large container under certain conditions, the pressure causes draft beer. Carbon dioxide is dissolved in
This will increase the carbon dioxide content of draft beer 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. 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. There is also a case where a large container is connected to pour draft beer. In such a case,
In order to obtain the required pouring rate (eg 3 liters / minute), high carbon dioxide pressure must be applied to the large container. In such a case, more carbon dioxide gas than expected will be dissolved in the draft beer to be poured out, and the flavor of draft beer may be impaired.

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. 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.

The mixing ratio of the nitrogen gas and the carbon dioxide gas is appropriately set according to the environment such as a store that dispenses draft beer from a large container. Skillful adjustment of each supply pressure is required, and each supply pressure must be readjusted each time because each supply pressure fluctuates due to temperature changes, etc., so the adjustment work is very complicated. Is.

In addition, as described above, the gas supply device for extruding a carbonated beverage using a mixed gas of nitrogen gas and carbon dioxide gas to extrude a carbonated beverage supplies nitrogen gas by a nitrogen gas generator. However, if the nitrogen gas generator is used, or if the nitrogen gas cylinder is used, and if the nitrogen gas cylinder is used, the nitrogen gas remains liquefied and remains gas. The nitrogen gas cylinder may be emptied because it is filled and the replacement frequency is high.In such a case, carbonated drinks cannot be poured out, which may hinder business. is there.

The present invention has been made in order to solve the problem in the case where a carbonated beverage is poured out from a large carbonated beverage container using the above mixed gas of nitrogen gas and carbon dioxide gas. That is, according to the present invention, it is possible to easily adjust the supply pressures of the respective gases for mixing the nitrogen gas and the carbon dioxide gas without requiring skill, and to keep the mixing ratio of the nitrogen gas and the carbon dioxide gas at a predetermined ratio. A first object of the present invention is to provide a gas supply device for extruding a carbonated beverage which can be kept at a high temperature.

Further, the present invention is a gas for extruding a carbonated beverage which can continuously dispense a carbonated beverage even when the compressor of the nitrogen gas generator fails or the nitrogen gas cylinder becomes empty. A second object is to provide a supply device.

[0012]

In order to achieve the above first object, a gas supply device for extruding a carbonated beverage according to the first invention comprises a carbon dioxide gas supply source and a nitrogen gas supply source. Carbon dioxide to be supplied by mixing the supplied nitrogen gas in the gas mixing section, supplying the mixed gas of the carbon dioxide gas and the nitrogen gas to the carbonated beverage container and extruding the carbonated beverage filled in the carbonated beverage container. In the gas supply device for beverage extrusion, a gas input port connected to the nitrogen gas supply source and a gas output connected to the gas mixing unit are provided in the middle of the nitrogen gas supply path for sending the nitrogen gas from the nitrogen gas supply source to the gas mixing unit. The pressure of the nitrogen gas supplied to the gas input port with respect to the pressure of the carbon dioxide gas input to the pressure signal input port. It is characterized in that the nitrogen gas pressure adjusting member and adjusted to the pressure of the constant ratio to the output from the gas output port is connected.

In the gas supply device for extruding a carbonated beverage according to the first aspect of the present invention, carbon dioxide gas supplied from a carbon dioxide gas supply source and nitrogen gas supplied from a nitrogen gas supply source are mixed in a gas mixing section, and this mixed gas is mixed. Is supplied to the carbonated beverage container to pour out the carbonated beverage filled in the carbonated beverage container.At this time, the nitrogen gas pressure adjusting member connected to the nitrogen gas supply path is used to mix the gas from the nitrogen gas supply source. So that the pressure of the nitrogen gas supplied to the section corresponds to the pressure of the carbon dioxide gas corresponding to the pressure signal of the carbon dioxide gas input to the pressure signal input port of the nitrogen gas pressure adjusting member to a predetermined ratio. Adjusted.

That is, when the supply pressure of nitrogen gas from the nitrogen gas supply source increases with respect to the supply pressure of carbon dioxide gas, the nitrogen gas pressure adjusting member outputs the nitrogen gas pressure adjusting member to the gas mixing section. Even if the secondary pressure of the nitrogen gas is reduced and the carbon dioxide supply pressure from the carbon dioxide gas supply source is lower than the nitrogen gas supply pressure, the nitrogen gas pressure adjustment member adjusts the nitrogen gas pressure. The secondary pressure of the nitrogen gas output from the member to the gas mixing section is likewise reduced, and the ratio of the pressures of nitrogen gas and carbon dioxide gas in the gas mixing section is always kept constant.

As described above, according to the gas supply device for extruding a carbonated beverage according to the first aspect of the present invention, the mixing ratio of the nitrogen gas and the carbon dioxide gas in the mixed gas is automatically set by the nitrogen gas pressure adjusting member. Even if the pressure of nitrogen gas from the gas supply source or the pressure of carbon dioxide gas from the carbon dioxide gas supply source fluctuates, the nitrogen gas pressure adjusting member outputs the nitrogen gas pressure adjusting member according to the change. Since the secondary pressure of the nitrogen gas supplied to the gas mixing section is automatically adjusted to a predetermined ratio with respect to the pressure of carbon dioxide gas, it is necessary to adjust the mixing ratio of nitrogen gas and carbon dioxide gas. It can be easily performed without requiring, and the mixed gas having a constant mixing ratio can be always supplied to the carbonated beverage container.

In order to achieve the second object, the gas supply device for extruding a carbonated beverage according to the second invention is the above-mentioned first embodiment.
In addition to the configuration of the invention described above, a nitrogen gas sub cylinder is connected to a nitrogen gas supply path between the nitrogen gas supply source and the nitrogen gas pressure adjusting member.

The gas supply device for extruding a carbonated beverage according to the second aspect of the present invention is used when nitrogen gas cannot be supplied from the nitrogen gas supply source due to a nitrogen gas supply source failure, for example, a compressor failure or the like. Nitrogen gas is supplied from the sub cylinder to the gas mixing section. by this,
It is possible to continue pouring out carbonated beverages from the carbonated beverage container with the mixed gas. In this case, since the sub-cylinder is connected to the upstream side of the nitrogen gas pressure adjusting member, the nitrogen gas supplied from this sub-cylinder can be supplied in the same manner as the nitrogen gas supplied from the nitrogen gas supply source. The pressure is adjusted by the adjusting member.

In order to achieve the second object, the gas supply device for extruding a carbonated beverage according to the third invention is the above-mentioned first invention.
In addition to the configuration of the invention, a three-way valve is provided in the carbon dioxide gas supply passage for sending carbon dioxide gas from the carbon dioxide gas supply source to the gas mixing portion, on the upstream side of the connection portion of the carbon dioxide gas supply passage with the nitrogen gas pressure adjusting member. One end of the bypass supply path is connected via
The other end of this bypass supply path is connected to the downstream side of the connection portion of the carbon dioxide gas supply path with the nitrogen gas pressure adjusting member, and the carbon dioxide gas from the carbon dioxide gas supply source is switched by switching the three-way valve. It is characterized in that the gas is supplied to the gas mixing section through a connection section with or through a connection section with the nitrogen gas pressure adjusting member.

The gas supply device for extruding carbonated beverages according to the third aspect of the present invention is used when nitrogen gas cannot be supplied from the nitrogen gas supply source due to a failure of the nitrogen gas supply source, for example, a compressor failure or the like. , If a sub cylinder of nitrogen gas is provided and this sub cylinder becomes empty, the carbon dioxide gas from the carbon dioxide gas supply source is connected to the nitrogen gas pressure adjusting member of the carbon dioxide gas supply path by switching the three-way valve. By-passing the section, it is supplied to the gas mixing section.

Thus, as an emergency measure, the carbonated beverage can be continuously poured out from the carbonated beverage container using only carbon dioxide gas, and the carbonated beverage can be poured out during business hours for the time being at a store or the like.

[0021]

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 J is a nitrogen gas sub-cylinder.

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 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 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 includes 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 housed 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 and the carbon dioxide gas supplied from the carbon dioxide gas cylinder E through the pressure adjusting valve E1, and the connection port P1 of the membrane unit B is connected. Check valve 14, a nitrogen gas pressure adjusting valve 15, a nitrogen gas supply valve 16, a nitrogen gas constant flow valve 18, and a nitrogen gas flow meter 19 in this order from the connection port P1 side to the output port P2 to the buffer tank D. And the check valve 20 is connected.

A blow valve 27 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 through the constant flow valve 28 and the silencer 29. It has become. Further, between the nitrogen gas pressure adjusting valve 15 and the nitrogen gas supply valve 16,
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 26, the carbon dioxide gas constant flow valve 21, and the carbon dioxide gas flow meter 22 are arranged in this order 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 side are joined at a joining 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 a predetermined value or less, and turned off when the pressure is a predetermined value or more. One end of the adjustment gas supply pipe L2 is connected to the carbon dioxide gas supply pipe L1 between the connection port P3 and the carbon dioxide gas supply valve 26, and the other end of the adjustment gas supply pipe L2 is connected to the nitrogen gas pressure adjustment valve 15 Is connected to a pressure signal input port described later, and the gas pressure in the carbon dioxide gas supply pipe L1 is applied to the nitrogen gas pressure adjusting valve 15.

Further, the downstream end of the bypass pipe L3 is connected to the carbon dioxide gas supply pipe between the carbon dioxide gas supply valve 26 and the constant carbon dioxide gas flow valve 21, and the upstream end of the bypass pipe L3 is provided with the pressure adjusting valve E1. Is connected to the three-way valve E2 connected between the connection port P3 and the connection port P3. The three-way valve E2 switches the carbon dioxide gas from the carbon dioxide gas cylinder E to the connection port P3 side and the bypass pipe L3 side and supplies the carbon dioxide gas.

The inflow side of the buffer tank D is connected to the output port P2 of the gas mixing unit A, and the outflow side of the buffer tank D is connected to the mixed gas pressure adjusting valve 25.
Is connected to the connection port P4 to which the draft beer barrel F is connected via the filter 24.

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.

The nitrogen gas pressure control valve 15 automatically adjusts the pressure of the nitrogen gas supplied to the confluence point Q by the carbon dioxide gas pressure in the carbon dioxide gas supply pipe L1 to adjust the fluctuation of the pressure of the nitrogen gas or carbon dioxide gas. Regardless of this, the mixing ratio of carbon dioxide gas and nitrogen gas at the confluence Q is always kept constant.

As shown in FIG. 3, the nitrogen gas pressure adjusting valve 15 has an adjusting gas supply pipe L2 connected to the pressure signal input port 15A. Further, the supply pressure input port 15B is connected to the nitrogen gas supply pipe L4 connected to the connection port P1, and the supply pressure output port 15C is joined to the confluence point Q.
The nitrogen gas supply pipe L5 connected to the side is connected.

The diaphragm DA built in the nitrogen gas pressure control valve 15 has a surface on one side (upper surface in FIG. 3) from the pressure signal input port 15A to the chamber C1.
The carbon dioxide pressure introduced into the chamber acts, and the supply pressure output introduced into the chamber C2 through the communication holes h1 and h2 on the other surface (lower surface in FIG. 3) of the diaphragm DA. The secondary pressure of nitrogen gas in the port 15C acts.

The diaphragm DB incorporated in the nitrogen gas pressure control valve 15 is introduced into the chamber C3 through the communication hole h3 and the fixed throttle 15D on one surface (upper surface in FIG. 3) of the diaphragm DB. The primary pressure of the nitrogen gas at the supply pressure input port 15B acts, and the supply is introduced into the chamber C4 on the other side surface (lower surface in FIG. 3) of the diaphragm DB through the communication hole h4. The secondary pressure of the nitrogen gas at the pressure output port 15C acts.

When the input signal pressure (carbon dioxide gas pressure) is input to the pressure signal input port 15A of the nitrogen gas pressure adjusting valve 15, the diaphragm DA is attached downward in FIG. 3 due to the rise of the pressure in the chamber C1. The nozzle N is closed by the flapper 15E that is energized and is connected to the diaphragm DA.

When this nozzle N is closed, from the supply pressure input port 15B side to the communication hole h3 and the fixed throttle 15D.
The pressure in the chamber C3 rises due to the primary pressure of the nitrogen gas introduced into the chamber C3 via the valve C3 to urge the diaphragm DB downward in the drawing, and the exhaust valve 15F connected to the diaphragm DB is supplied. The air valve 15G is pushed down against the spring 15H so that the supply pressure input port 15B side and the supply pressure output port 15C side communicate with each other.

As a result, nitrogen gas flows from the supply pressure input port 15B to the supply pressure output port 15C side and is supplied to the confluence Q via the nitrogen gas supply pipe L5. Then, the pressure of the nitrogen gas flowing into the supply pressure output port 15C side is introduced into the chamber C4 through the communication hole h4, and acts on the diaphragm DB in the upward direction in the drawing so that the gas pressure in the chamber C3 (primary pressure ),
The secondary pressure on the supply pressure output port 15C side is introduced into the chamber C2 through the communication holes h1 and h2, and acts on the diaphragm DA in the upward direction in the drawing to oppose the input signal pressure in the chamber C1. The secondary pressure of the nitrogen gas at the supply pressure output port 15C is balanced at the set pressure, that is, the pressure corresponding to the input signal pressure of the carbon dioxide gas input to the pressure signal input port 15A.

In this balanced state, when the pressure of the nitrogen gas introduced into the supply pressure input port 15B rises, the secondary pressure at the supply pressure output port 15C side rises accordingly, and this rises. The secondary side pressure is introduced into the chamber C2 through the communication holes h1 and h2 and into the chamber C4 through the communication hole h4, and the chamber C1 and the chamber C3, respectively.
The diaphragms DA and DB are urged upward in the drawing against the internal pressure.

When the diaphragm DA is pushed upward in the drawing, the flapper 15E is separated from the nozzle N, and the nitrogen gas in the chamber C3 is discharged from the exhaust port 15I to the atmosphere through the nozzle N, and the diaphragm DB is discharged. The back pressure acting on is reduced. As a result, the diaphragm DB is lifted upward in the drawing, the lower end of the exhaust valve 15F is separated from the air supply valve 15G, and the exhaust port 15g of the air supply valve 15G is opened. The nitrogen gas on the port 15C side is discharged, and the secondary pressure of the nitrogen gas supplied to the confluence Q decreases.

Then, the secondary pressure on the supply pressure output port 15C side is reduced, whereby the chamber C2 and the chamber C are
The pressure in 4 decreases and the pressures on both sides of the diaphragm DA and the diaphragm DB balance, so that the nozzle N and the exhaust port 15 of the air supply valve 15G are discharged.
g is closed again, and the flow of nitrogen gas from the supply pressure input port 15B side to the supply pressure output port 15C side is restarted.

By repeating the above operation, the junction signal Q corresponds to the input signal pressure input to the pressure signal input port 15A regardless of the rise in the primary pressure of the nitrogen gas on the supply pressure input port 15B side. The nitrogen gas having a predetermined ratio of pressure is supplied.

When the carbon dioxide gas pressure in the carbon dioxide gas supply pipe L1 decreases, the input signal pressure input to the pressure signal input port 15A via the adjustment gas supply pipe L2 also decreases, which causes the inside of the chamber C1 to be reduced. Due to the decrease in pressure, the diaphragm DA is lifted upward in the drawing by the pressure in the chamber C2.

As a result, the flapper 15E is separated from the nozzle N, and the nitrogen gas in the chamber C3 is discharged from the exhaust port 15I to the atmosphere through the nozzle N and acts on the diaphragm DB, as in the above case. And the diaphragm DB is lifted upward in the drawing by the pressure in the chamber C4 due to the decrease in the back pressure. The lower end of the exhaust valve 15F is separated from the air supply valve 15G and the exhaust port 15g of the air supply valve 15G is opened, so that the nitrogen gas on the supply pressure output port 15C side is exhausted from the exhaust port 15g. As a result, the secondary pressure of the nitrogen gas supplied to the confluence point Q decreases.

Then, the pressure in the chambers C2 and C4 decreases due to the decrease in the secondary pressure on the supply pressure output port 15C side, and the pressures on both sides of the diaphragm DA and the diaphragm DB are balanced so that the nozzles Exhaust port 1 of N and air supply valve 15G
5 g is closed again, and the flow of nitrogen gas from the supply pressure input port 15B side to the supply pressure output port 15C side is restarted.

As described above, the pressure signal input port 1
The input signal pressure input to 5A, that is, the nitrogen gas having a pressure corresponding to the lowered carbon dioxide pressure is supplied to the junction point Q.

In the gas supply device for extruding carbonated beverages, the nitrogen gas generated by the compressor unit C and the membrane unit B is supplied to the gas mixing unit A via the connection port P1, and the carbon dioxide gas is supplied from the carbon dioxide gas cylinder E to the connection port P3. The nitrogen gas and the carbon dioxide gas are mixed at the confluence point Q, introduced into the buffer tank D from the output port P2 and once stored, and then connected to the connection port P.
4 is supplied to the draft beer barrel F.

At this time, in the gas mixing unit A, the pressure of the nitrogen gas supplied from the connection port P1 to the confluence point Q is changed by the nitrogen gas pressure adjusting valve 15 to the connection port P3.
Corresponding to the pressure of carbon dioxide gas supplied from the
The mixing ratio of the nitrogen gas and the carbon dioxide gas at the confluence Q is adjusted to a predetermined value, for example, 1: 1 or 3: 2.

That is, as described above, the connection port P
The pressure of the nitrogen gas supplied to 1 rises and the connection port P
When the ratio of the carbon dioxide gas supplied to 3 to the pressure increases, the nitrogen gas pressure adjusting valve 15 lowers the secondary pressure of the nitrogen gas supplied from the nitrogen gas pressure adjusting valve 15 to the joining point Q, The mixing ratio of both in Q is kept constant.

When the pressure of the carbon dioxide gas supplied to the connection port P3 decreases and the ratio of the pressure of the nitrogen gas supplied to the connection port P1 decreases, the nitrogen gas pressure adjusting valve 15 causes the nitrogen gas pressure adjusting valve to operate. The secondary pressure of the nitrogen gas supplied from 15 to the confluence Q is reduced, and the mixing ratio of the two at the confluence Q is kept constant.

When the compressor 2 of the compressor unit C fails in the above-mentioned carbonated beverage pushing gas supply device, the pressure adjusting valve J1 is opened so that the nitrogen gas is supplied from the nitrogen gas sub cylinder J to the nitrogen gas pressure adjusting valve 15. After being supplied, the pressure is adjusted according to the pressure of carbon dioxide gas in the same manner as described above, and then supplied to the confluence Q.

When the compressor 2 breaks down and the sub-cylinder J becomes empty, in order to continue the pouring of draft beer from the draft beer barrel F, as an emergency measure, the three-way valve E2 is switched to change the carbon dioxide. Carbon dioxide gas from the gas cylinder E bypasses the connection port P3 and is introduced to the downstream side of the carbon dioxide gas supply valve 26. As a result, the draft of beer is ensured during business hours in beer gardens and the like.

In the carbonated beverage extruding gas supply device, the back pressure relief valve 7 is opened for a predetermined time before the compressor 2 of the compressor unit C is driven. This is 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 protected from a shock at the time of starting the compressor 2.

Further, after the driving of the compressor 2 is started, the blow valve 27 of the gas mixing unit A is opened for a predetermined time, and the gas supplied from the membrane unit B through the connection port P1 is controlled by the constant flow valve 28 and. It is released into the atmosphere through the silencer 29. This is because when the gas supplied from the membrane unit B is supplied to the confluence point Q at the same time as the driving of the compressor 2 is started, the air filled in the membrane module 11 of the membrane unit B while the compressor 2 is stopped, that is, pure air. This is because a gas other than nitrogen will be mixed with carbon dioxide.

[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 side sectional view showing a structure of a nitrogen gas pressure regulating valve in the same example.

[Explanation of symbols]

 A ... Gas mixing unit B ... Membrane unit (nitrogen gas supply source) C ... Compressor unit (nitrogen gas supply source) E ... Carbon dioxide gas cylinder (carbon dioxide gas supply source) F ... Draft beer barrel J ... Sub cylinder Q ... Confluence point (gas mixing section) ) L1 ... Carbon dioxide gas supply pipe (carbon dioxide gas supply passage) L2 ... Adjustment gas supply pipe L3 ... Bypass pipe (bypass supply passage) L4, L5 ... Nitrogen gas supply pipe (nitrogen gas supply passage) 15 ... Nitrogen gas pressure adjusting valve (Nitrogen gas pressure adjusting member) 15A ... Pressure signal input port 15B ... Supply pressure input port (input port) 15C ... Supply pressure output port (output port)

Claims (3)

[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, in the middle of the nitrogen gas supply path for sending nitrogen gas from the nitrogen gas supply source to the gas mixing section. A gas input port connected to the nitrogen gas supply source, a gas output port connected to the gas mixing section, and a pressure signal input port connected to the carbon dioxide gas supply source, of the nitrogen gas supplied to the gas input port. A nitrogen gas pressure adjusting member that adjusts the pressure so that it has a predetermined ratio to the pressure of carbon dioxide gas input to the pressure signal input port and outputs from the gas output port is connected. A gas supply device for carbonated beverages extrusion, characterized in that are. 2. The carbonated beverage extruding gas supply device according to claim 1, wherein a nitrogen gas sub-bomb is connected to a nitrogen gas supply path between the nitrogen gas supply source and the nitrogen gas pressure adjusting member. 3. A carbon dioxide gas supply passage for sending carbon dioxide gas from the carbon dioxide gas supply source to a gas mixing portion, through a three-way valve upstream of a connection portion of the carbon dioxide gas supply passage with a nitrogen gas pressure adjusting member. One end of the bypass supply passage is connected, and the other end of the bypass supply passage is connected to the downstream side of the connection portion of the carbon dioxide gas supply passage with the nitrogen gas pressure adjusting member, and the carbon dioxide gas supply source is switched by switching the three-way valve. The carbon dioxide extruding gas supply device according to claim 1, wherein the carbon dioxide gas is supplied to the gas mixing section through a connection with the nitrogen gas pressure adjusting member or bypassing a connection with the nitrogen gas pressure adjusting member. .