JPH03244463A - Device for manufacturing carbonated spring with minute bubbles - Google Patents

Abstract

PURPOSE:To stably supply CO2 in any arbitrary concentration easily by opening a solenoid valve for supply of CO2 and another solenoid valve for supply of air alternately, and thereby setting the open times of the two by a control part to any desired values. CONSTITUTION:A gas/liquid mixing part 13 to supply CO2 and air is furnished at the fore stage of a pressurizing pump 1 on a pipeline 12. A supply pipe functioning as a gas supply part 2 is connected with this gas/liquid mixing part 13, and with this supply pipe are connected a piping 5a for supplying CO2 and another piping 5b for supplying air. These pipings 5a, 5b are fitted with respective solenoid valves 6a, 6b. A decompression valve 14 and a CO2 container 15 are connected with the piping 5a in its position farther than the solenoid valve 6a. Accordingly, the CO2 or air is inhaled by opening or closing the solenoid valve 6a or 6b and fed to the pipeline 12 from the gas supply part 2 via the gas liquid mixing part 13.

Description

Detailed Description of the Invention [Industrial Application Field 1] The present invention involves dissolving a gas in a liquid under pressure, reducing the pressure of the liquid to generate microbubbles, and dissolving carbon dioxide as a gas into liquid water. The present invention relates to a micro-bubble carbonated spring producing device that can produce carbonated spring by dissolving it under pressure.

[American technology 1] When producing carbonated springs from the United States, two methods are used: one is to put tablets of sodium bicarbonate, which chemically generates carbon dioxide, into a bathtub, and the other is to bubble carbon dioxide into a bathtub. There are also known methods of dissolving it.

By the way, when trying to make highly concentrated carbonated springs, the former method, which uses chemicals, requires the use of a large number of tablets, which poses a problem in terms of cost. In addition, with this method, the undissolved carbon dioxide gradually escapes from the water surface in the form of bubbles, making it possible to increase the concentration only to a certain extent. If the amount of carbon dioxide escaping from the water surface was large, the concentration of carbon dioxide would rise in a small bathroom, posing a risk of suffocation.

Even with the latter method, the concentration increased to a certain extent by bubbling over time, but it was not possible to increase the concentration further. Moreover, when the concentration exceeds a certain level, the amount of carbon dioxide that is supplied will escape more than the amount that will dissolve.
There were also economic problems. Also, as in the former case, if the concentration becomes high and the amount of carbon dioxide escaping from the water surface increases, there is a risk of suffocation in small bathrooms.

[Problem to be solved by the invention 1 When creating fine bubble carbonated springs or fine bubbles by the pressurized melting method, the balance between gas supply time and rest time is easy to set and the operation is stable if various conditions are constant. There is a problem in that when the water level in the bathtub or the amount of water in the accumulator changes, the conditions tend to deviate from the set values and the balance tends to collapse.

The present invention was invented in view of the above-mentioned problems, and its purpose is to mix gaseous carbon dioxide and air at a constant ratio, to be able to continuously and stably supply carbon dioxide, and to An object of the present invention is to provide an apparatus for producing fine bubble carbonated spring water that can improve the utilization efficiency of carbonated spring water.

[Means for Solving the Problems] In order to achieve the above object, the fine bubble carbonated spring of the present invention dissolves gas in the liquid by mixing gas and liquid and pressurizing the mixture, and then depressurizing the liquid again. This is a micro-bubble generator that precipitates micro-bubbles by using a gas supply unit 2 that supplies carbon dioxide and air before the pressure pump 1, and a liquid level sensor 31 for water level detection on the discharge side of the pressure pump 1. In the micro-bubble carbonated spring producing device, which is characterized by being equipped with an accumulator 4 having a function of discharging undissolved gas, a solenoid valve 6 is attached to each of the pipes 5a and 5b for supplying carbon dioxide and air, and the solenoid valve By switching the valves 6a and 6b, the field opening time is controlled to a constant value, and by alternately injecting carbon dioxide and air, a constant mixture of carbon dioxide and air is performed, and the water level in the cumulator 4 is kept within a certain range by the liquid level sensor 3. A control unit is provided to control the gas injection time and/or injection interval so as to maintain the gas injection time and the injection interval at #! The exhaust section 7 for dissolving the undissolved gas was connected to the gas supply section 2.

[Effect 1] In other words, the gas supplied from the gas supply section 2 is mixed with the liquid (bath water), dissolved under pressure by the pressurizing pump 1, undissolved gas is discharged by the accumulator 4, and the liquid in which this gas is dissolved is dissolved. By reducing the pressure, the gas is precipitated as fine bubbles, but not only carbon dioxide but also air is mixed as a gas supplied to the liquid, and the carbon dioxide and the air are dissolved into the liquid under pressure. The mixing of air and carbon dioxide is performed by setting the opening time of the solenoid valves 6a and 6b attached to each (the opening time is set using a timer, etc.), and the timing of gas supply is determined by the opening time of the solenoid valves 6a and 6b attached to each. The solenoid valves 6a and 6b are set to open in response to the signal from the liquid level sensor 3, and by doing this, when the water level in the 7-cumulator 4 is low (
When sufficient gas has entered the accumulator 4), the solenoid valve 6a16b is closed, and the gas in the system is consumed while reusing (remelting) the exhaust gas. When the water level in the accumulator rises, a signal is sent from the liquid level sensor, and each electromagnetic valve 6a, 6b is opened at a certain time to supply air.

[Examples] Hereinafter, the present invention will be described in detail based on examples shown in the accompanying drawings.

FIG. 1 shows a piping diagram of an embodiment of the present invention. This embodiment shows an example in which fine bubble carbonated spring water is discharged into a bathtub 8. There is a bathtub 8 on the inner wall of the bathtub 8.
A suction port 10 for sucking in the liquid (i.e. bath water) 9 inside
is provided, and the bath water 9 sucked in from the suction port 10 is spouted out from the discharge/slip 11. Reference numeral 12 denotes a pipe line extending between the suction port 10 and the discharge/spool 11, and the pressurizing pump 1 is disposed therein.

The @ stage of the pressure pump 1 in the pipe line 12 (i.e., the suction fi
1) is provided with a gas-liquid mixing section 13 that supplies carbon dioxide and air. A supply pipe serving as a gas supply unit 2 is connected to this gas-liquid mixing unit 13, and a carbon dioxide supply pipe 5a to which carbon dioxide is supplied and air are supplied to this supply pipe serving as a gas supply unit 2. It is connected to the air supply piping 5b. Solenoid valves 6a and 6b are attached to the carbon dioxide supply pipe 5a and the air supply pipe 5b, respectively.

A pressure reducing valve 14 and a carbon dioxide cylinder 15 are connected to the end of the electromagnetic valve 6a of the carbon dioxide supply pipe 5a. Therefore, by opening and closing the solenoid valve 6a or 6b, carbon dioxide or air can be taken in and supplied from the gas supply section 2 to the pipe line 12 via the gas-liquid mixing section 13.

Seven accumulators 4 are provided on the discharge side of the conduit 12 relative to the pressure pump 1. An exhaust section 7 for the undissolved gas separated by the accumulator 4 is provided in the upper part of the accumulator 4, and this exhaust section 7 and an air supply pipe which is the gas supply section 2 are connected by an exhaust pipe 16. This exhaust pipe 16 has a haiku
A crest valve 17 is provided. The accumulator 4 is provided with a liquid level sensor 3 for detecting the water level in the accumulator 4. A detection signal of the water level in the accumulator 4 by this liquid level sensor 3 is sent to the control unit 18, and the control unit 18 The solenoid valves 6a and 6b are set to open in response to a control signal. That is, when the pressure pump 1 is turned on, the bath water 9 in the bathtub 8 is sucked into the pipe line 12 through the suction port 10. At this time, if the water level in the accumulator 4 is higher than a certain value, a signal from the liquid level sensor 3 causes the solenoid valve 6a provided in the carbon dioxide supply pipe 5a to open for a set time and then close. Subsequently, the solenoid valve 6b provided in the air supply pipe 5b is opened for a set time and then closed. At this time, both solenoid valves 6a and 6b should not be opened at the same time.

This is because if both solenoid valves 6a and 6b are opened at the same time, the negative pressure during suction will fluctuate greatly, making it difficult to maintain a constant intake amount of carbon dioxide and air. 111i171 are supplied alternately. By opening alternately in this way (not opening both at the same time), the amount of gas supplied is always inhaled at a nearly constant amount for both carbon dioxide and air (because the negative pressure can be kept constant), so all that is left to do is set the inhalation time. By simply changing the amount using the control unit 18, carbon dioxide of any concentration can be supplied in any amount.

Here, when only fine bubbles are supplied, only air is supplied.

By the way, v! Figure J2 shows a time chart for the case of fine carbonated spring in the present invention, and #! FIG. 13 shows a time chart in the case of only fine bubbles.

7 and 8 show comparative examples in which the liquid level sensor 3 is not used. The device shown in FIGS. 7 and 8 does not use the liquid level sensor 3, but uses a timer to keep the opening and closing times of the solenoid valve 6a for carbon dioxide supply and the solenoid valve 6b for air supply constant. , FIG. 7 shows a time chart in the case of a fine bubble fountain, and FIG. 8 shows a time chart in the case of only fine bubbles.

And in #S2 figure, figure 3, figure 7, figure 8,
A indicates on/off of the switch, B indicates on/off of the solenoid valve 6a for carbon dioxide supply, C indicates on/off of the solenoid valve 6b for air supply, and D indicates the liquid level sensor. 3 on and off, T1 indicates the carbon dioxide intake time, T2 indicates the air intake time, and T
3 indicates the pause time set by the timer, and T indicates the pause time determined by the liquid level sensor.

Therefore, the method of determining the air supply timing using the liquid level sensor 3 (the method of the present invention) works better than the method of setting the pause time constant using a timer as shown in FIGS. 7 and 8, which are comparative examples. is certain and stable. In the one-timer type of the comparative example, the concentration of the liquid gradually decreases during long-term operation, so if the downtime is constant, gas will gradually accumulate in the accumulator 4, and eventually the gas will be discharged from the accumulator 4. However, the system using the liquid level sensor 3 as in the present invention has the disadvantage that the balance of the air supply is likely to collapse due to fluctuations in the water level in the bathtub 8 and fluctuations in the flow rate. Even if fluctuations occur, the water level in the accumulator 4 is always maintained within a certain range, and the valve is only opened and closed when the water level reaches a certain level, resulting in stable operation.

Then, due to the flow rate of the bath water 9, the pressure in the gas supply part 2 becomes more negative than that in the pipe line 12, and carbon dioxide or air is sucked into the pipe line 12 from the gas-liquid mixing part 13 due to the ejector effect.
The mixture is mixed with the water, pressurized by the pressure pump 1, and dissolved in the bath water 9. At this time, in order to increase the dissolution efficiency of carbon dioxide and air by the pressure pump 1, it is necessary to supply an excess amount of gas to the amount of gas actually dissolved, and the gas is pressurized by the pressure pump 1. Also, large amounts of undissolved gas are present. Therefore, the excess gas is separated in the accumulator 4 and exhausted from the exhaust throttle valve 17 connected to the exhaust section 7 provided in the accumulator 4. The exhaust of accumulator 4 is the exhaust throttle valve 1.
7, passes through the exhaust pipe 16, is returned to the supply pipe that is the gas supply section 2, and is dissolved again in the gas-liquid mixing section 13. For this reason, the supply of gas only requires replenishing the amount consumed by pressurized dissolution, and replenishment can be accomplished by intermittent injection. Further, the exhaust throttle valve 17 adjusts the exhaust amount to prevent the pressure inside the accumulator 4 from being excessively reduced. In other words, the bath water 9 in which carbon dioxide and air are dissolved is sent to the discharge nozzle 11 through the pipe 12 in a pressurized state, but on the way, it passes through the inside of the nozzle 4. At this time, the accumulator 4 has the general function of absorbing the pulsation of the bath water 9 and absorbing the impact pressure, and also absorbs air and carbon dioxide that have not been completely dissolved by the pressurization in the pressure pump 1. This functions to promote the dissolution of the water and to separate the excess gas from the bath water 9 by causing the excess gas that has not yet dissolved to float to the upper part of the accumulator 4. The bath water 9 that has passed through the accumulator 4 is in the form of a gas in which carbon dioxide and air are dissolved at a high concentration, and the bath water in which the gas is dissolved at a high concentration is discharged into the bathtub 8 from the discharge nozzle 11. It is. Then, the bath water in which the gas has been dissolved from the discharge nozzle 11 changes from a pressurized state to a pressure-released state, and the air dissolved in the bath water 9 becomes fine bubbles and enters the bath water 9 in the bath WI8. It precipitates out. Carbon dioxide is mixed with these fine bubbles, and when the IT dioxide dissolved under pressure is decompressed, it prevents it from rising rapidly towards the water surface as a large catch, and prevents the fine bubbles from rising rapidly toward the water surface. Floating in the bath water 9 with air bubbles,
This allows for highly efficient redissolution by utilizing the large gas-liquid contact area of microbubbles.

As for the ratio of air and carbon dioxide, the more air there is, the more microbubbles will be generated, and the more carbon dioxide there is, the less precipitation of microbubbles will occur, so the degree of white turbidity caused by microbubbles will become less.

Also, if a large amount of carbon dioxide is supplied, a large catch will be deposited, so it is recommended to adjust the ratio depending on the purpose and use.

In addition to the above-mentioned embodiments, as a method of controlling the water level using the liquid level sensor 3, there is a method in which the supply order of carbon dioxide and air is switched as shown in FIG. It is also possible to consider a pattern in which air is supplied between the two, and vice versa. Furthermore, the supply time itself may be controlled by the height of the liquid level rather than by a liquid level sensor, rather than by setting the time using a timer or the like.

[Effect of the invention 1 In the present invention, as described above, solenoid valves are attached to the pipes that supply carbon dioxide and air, and by switching the solenoid valves, the opening and closing times are controlled to be constant, and the carbon dioxide and air are injected alternately. A control unit is provided to control the gas injection time and/or injection interval so as to perform quantitative mixing of carbon dioxide and air and to maintain the water level in the accumulator within a certain range using a liquid level sensor. Since the solenoid valve for carbon dioxide supply and the solenoid valve for air supply are opened alternately, the opening time of both can be arbitrarily set using the control unit, making it easy to release carbon dioxide at any concentration. It can be stably supplied, and since the number of times the solenoid valve is opened and closed can be reduced, the life of the solenoid valve can be shortened. In addition, by timing the air supply by going up to the liquid level sensor, it is possible to always dissolve the gas stably without being affected by flow rate, gas dissolution rate, or water level fluctuations.
As a result, stable fine-bubbled carbonated springs can be produced at all times. Furthermore, since the separated undissolved gas exhaust part provided in the 7-cumulator is connected to the gas supply part, a certain amount of gas always remains in the piping, so it is only necessary to supply only the consumed amount. Since the supply amount is kept to a minimum, pressure fluctuations during supply can also be minimized, making it possible to supply a more stable carbonated spring with fine bubbles. Furthermore, since there is no exhaust or drainage to the outside, there is no exhaust noise, resulting in quieter operation and no need for drainage piping.

Furthermore, since all the gas is used for dissolution without being discarded, there is no waste and it is economical even when expensive gases other than air are used.

[Brief explanation of drawings]

Figure 1 is a piping diagram of an embodiment of the present invention, Figure 2 is a time chart for the same fine bubble R acid spring, Figure #S3 is a time chart for the same fine bubble spring, and Figure 4 is the same as the above. Time chart for fine bubble carbonated spring according to another embodiment of the invention,
Figure 5 is a time chart for the case of fine bubbles in the same pond example, Figure 6 is a piping diagram for a comparative example, Figure 7 is a time chart for a fine bubble carbonated spring in a comparative example, and Figure 8 is a comparison. This is a time chart for the example of microbubbles, in which 1 is a pressurizing pump, 2 is a gas supply unit, 3 is a liquid level sensor, 4 is an accumulator, 5a is a pipe, 5b is a pipe, 6a is a solenoid valve, 6
b is a solenoid valve, and 7 is an exhaust section.

Claims (1)

[Claims] (1) A micro-bubble generator that dissolves gas in the liquid by mixing gas and liquid and applying pressure, and then precipitates micro-bubbles by reducing the pressure of the liquid again. Provided with a gas supply section that supplies
A micro-bubble carbonated spring production device characterized by having an accumulator with a function of discharging undissolved gas and a liquid level sensor for detecting water level attached to the discharge side of a pressurizing pump, supplying carbon dioxide and air. Attach a solenoid valve to each piping, and by switching the solenoid valve, the opening and closing time is controlled at a constant rate, and by alternately injecting carbon dioxide and air, quantitative mixing of carbon dioxide and air is achieved, and the water level in the accumulator is controlled by a liquid level sensor. A control section is provided to control the gas injection time and/or injection interval so as to maintain the gas within the range, and the separated undissolved gas exhaust section provided in the accumulator is connected to the gas supply section. A micro-bubble carbonated spring production device characterized by: