JPH04348752A - Minute foam carbonated spring producing device - Google Patents

Abstract

PURPOSE:To obtain an optimal system in accordance with its concentration even if supplied carbonic acid gas concentration is not fixed. CONSTITUTION:A minute foam generating device 1 allows a liquid to dissolve gas by mixing and pressurizing gas and a liquid, and deposits minute foam by pressure-reducing again the liquid this gas is dissolved. This device is provided with a carbonic acid gas concentration detecting means 2 for knowing substitutively concentration of supplied carbonic acid gas by a dissolving time of gas. Also, this device is provided with a control part 3 for controlling a dissolving system of the minute foam generating device 1 in accordance with the carbonic acid gas concentration derived substitutively by the carbonic acid gas concentration substitution detecting means 2.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention involves dissolving a gas in a liquid under pressure, and reducing the pressure of the liquid in which the gas is dissolved, thereby generating fine bubbles and dissolving carbon dioxide gas as a gas in water, which is a liquid, under pressure. The present invention relates to a micro-bubble carbonated spring production device that can produce carbonated spring by

0002

[Prior Art] Conventional methods for obtaining carbon dioxide gas include chemically generating carbon dioxide gas by mixing carbonate and acid, supplying it with a carbon dioxide cylinder, or using carbon dioxide gas emitted from a combustion device. There is a method of supplying concentrated carbon dioxide, but it is not possible to create microbubbles just by supplying carbon dioxide gas. For this reason, in order to make fine bubble carbonated springs, it is necessary to mix air with carbon dioxide gas and dissolve the mixed gas of carbon dioxide gas and air under pressure.

On the other hand, for the production of fine bubble carbonated springs, an optimal system is being considered depending on the concentration of carbon dioxide gas supplied. For example, in the case of highly concentrated carbon dioxide gas, in order to use the carbon dioxide gas as effectively as possible, it is conceivable to return the undissolved gas separated in the accumulator to the supply side and redissolve it. Conversely, when the carbon dioxide concentration in the supplied gas is low, the air content is large, so redissolving the air takes time to dissolve the air, reducing the carbon dioxide concentration in the liquid (for example, bath water) in a short time. It is difficult to achieve high concentrations. Therefore, in such a case, a method of directly exhausting the undissolved gas to the outside of the system may be considered.

[0004] As described above, the optimal dissolution system for the microbubble generator can be considered depending on the concentration of carbon dioxide gas supplied. However, since the concentration of carbon dioxide gas supplied (in a mixed state) is not necessarily constant, there is a problem that the system cannot always be operated in an optimal manner. Furthermore, it was not possible to know the concentration of carbon dioxide gas to be supplied and operate the system with the optimum system. Furthermore, at present, it has not been possible to measure the concentration of supplied carbon dioxide due to the lack of inexpensive and highly accurate sensors.

[0005]

[Problems to be Solved by the Invention] As described above, when trying to supply fine-bubbled carbonated springs using the prior art, there are various problems as described above. The present invention was invented in view of the above-mentioned problems, and its purpose is to create an optimal system according to the concentration of carbon dioxide gas supplied, even if the concentration is not constant. To provide a fine bubble carbonated spring manufacturing device capable of producing fine bubble carbonated spring stably and in a short time.

[0006]

[Means for Solving the Problems] The micro-bubble carbonated spring production device of the present invention dissolves gas in the liquid by mixing gas and liquid and applying pressure, and then depressurizes the liquid in which the gas is dissolved again. In the micro bubble generator 1 that precipitates micro bubbles, the carbon dioxide concentration substitute detection means 2 is used to substitutely know the concentration of the supplied carbon dioxide gas by the dissolution time of the gas, and the carbon dioxide concentration substitute detection means 2 is used as a substitute. It is characterized by comprising a control section 3 for controlling the dissolution system of the micro bubble generator 1 according to the carbon dioxide concentration determined by the method, and by adopting such a configuration. , the above-mentioned problems of the conventional example have been solved and the object of the present invention has been achieved.

[0007]

[Operation] Carbon dioxide concentration surrogate detection means 2 for knowing the concentration of supplied carbon dioxide gas by proxy by the dissolution time of the gas
The concentration of carbon dioxide gas supplied is known, and based on this concentration information, the control unit 3 operates the dissolution system of the micro bubble generator 1 in an optimal state corresponding to the carbon dioxide concentration.

[0008]The supplied gas consists of a mixed gas of carbon dioxide gas and air in order to produce fine bubble carbonated spring.
Since carbon dioxide gas has a solubility 40 times higher than that of air (at a partial pressure of 100%), the dissolution rate is faster. Therefore, even if the carbon dioxide concentration of the supplied mixed gas is not known, the carbon dioxide concentration can be predicted if the dissolution time is known. For example, if the carbon dioxide concentration of the supplied gas is low, if exhaust gas is recovered and recycling operation is performed, the amount of air will be large and it will take a long time to dissolve all of the supplied gas. ) does not easily produce highly concentrated carbonated springs. Therefore, in such cases, it is effective to use an evacuation method to release excess gas to the outside of the system. Conversely, if the carbon dioxide concentration of the supplied gas is high, the carbon dioxide concentration of the surplus gas is also high, and dissolution efficiency (yield) will decrease if the exhaust is exhausted using the exhaust method, so it is recommended to recycle and reuse the exhaust gas. Conceivable. In this way, the accumulator discharge mode (
By controlling the switching of the system), high-concentration fine-bubbled carbonated spring can be produced efficiently and in a short time.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail based on embodiments shown in the accompanying drawings. FIG. 1 shows a system diagram of the present invention, and FIG. 2 shows an enlarged cross-sectional view of the accumulator. In the embodiment shown in the figure, bath water 5 (
Hereinafter, the liquid will be explained as bath water 5). By operating the pressure pump 6, the bath water 5 in the bathtub 4 is guided from the suction port 7 through the pipe 8 to the pressure pump 6. An intake pipe 10 is provided in the middle of the piping 8, and the tip of this intake pipe 10 is branched into two parts, one being an air supply pipe 10a and the other being a carbon dioxide gas supply pipe 1.
It is 0b. The air supply pipe 10a and the carbon dioxide gas supply pipe 10b are provided with solenoid valves 11 and 12 for controlling the supply of air 13 and carbon dioxide gas 14, respectively.By switching the opening and closing of these solenoid valves 11 and 12, , the necessary gas is introduced into the pipe 8. Of course, in this case, it is also possible to supply only the air 13 or only the carbon dioxide gas 14. Furthermore, a mixed gas of carbon dioxide gas 14 and air 13 can also be introduced by controlling the opening and closing of both valves. The bath water 5 mixed with gas in this manner is pressurized by the pressurizing pump 6, and a portion of the gas is dissolved in the bath water 5. The pressurized dissolved water with dissolved gas (albeit containing undissolved gas) is sent to an accumulator 15 where the undissolved gas is separated. The pressurized dissolved water from which undissolved gas has been separated is discharged into the bathtub 4 from the fine nozzle 16 in the form of fine bubbles. On the other hand, undissolved gas is sent from above the accumulator 15 to the exhaust pipe 18 while adjusting the exhaust amount by the exhaust valve 17. The exhaust pipe 18 is further branched into a recycle pipe 19, and the exhaust pipe 18 is opened to the outside of the system via a solenoid valve 20. The recycle pipe 19 is connected to a pipe 8, and the solenoid valve 2
1 is provided. By switching the solenoid valve 21 and the solenoid valve 20, it is possible to select whether to use the exhaust gas for remelting or to discharge it to the outside of the system.

The inside of the accumulator 15 is as shown in FIG. 2, and long and short water level detection electrodes 25 and 26 are provided. These long and short water level detection electrodes 25 and 26 detect the water level in the accumulator 15 to control the opening and closing of the gas supply solenoid valves 11 and 12, the exhaust side solenoid valve 20, or the recycling solenoid valve 21. The water level in the accumulator 15 is controlled within a certain range to stably produce fine bubble carbonated spring.

Next, an explanation will be given of an operating circuit corresponding to the concentration of carbon dioxide gas supplied in the dissolution system of the microbubble generator 1 of the present invention. (When the carbon dioxide concentration is 100% to 95%) If the carbon dioxide concentration is 95% or more, fine bubbles cannot be formed unless air is mixed in. Therefore, it is necessary to mix air up to about 5%. The carbon dioxide gas is supplied by opening the solenoid valve 11 for carbon dioxide gas and the solenoid valve 12 for carbon dioxide gas supply as appropriate. When the supply concentration is high in this way, the concentration of carbon dioxide in the exhaust gas also becomes high, so by opening the electromagnetic valve 21 of the recycle pipe 19, undissolved carbon dioxide may be redissolved and recovered. By recycling in this manner, 100% of the supplied gas can be used for dissolution, and the supplied carbon dioxide gas can be used effectively. Of course, exhaust may be performed using the exhaust solenoid valve 20 of the exhaust pipe 18. In the case of the exhaust method, the yield of dissolved carbon dioxide gas decreases, but the carbon dioxide concentration in the bath water 5 can be increased in a short time. In the case of the recycling method, the water level detection electrodes 25, 2 of the accumulator 15
6 is used to control gas supply. When the water level is below the water level detection electrode 25, there is sufficient gas in the system, so the gas supply is stopped and the exhaust gas is redissolved by a recycling method. When the water level rises to the position of the water level detection electrode 25, gas is supplied again. When the water level falls below the water level detection electrode 26, the gas supply is stopped and the process is switched to recycling. By repeating this process, fine bubble carbonated spring can be produced stably.

(When the carbon dioxide concentration is 50% or less) Since the supplied carbon dioxide concentration is low and a large amount of air is contained, there is no need to supply air from the air supply pipe 10a. Since air is less soluble in water than carbon dioxide gas, carbon dioxide gas dissolves earlier than air in the supplied gas. Therefore, in the recycling method, carbon dioxide gas is dissolved first in the initial stage, leaving air as an undissolved gas. There is a problem in that a large amount of time is required to dissolve this air, resulting in a slow rise in the carbon dioxide concentration of the bath water. For this reason, the exhaust system is more desirable. In the case of the exhaust system, gas is basically continuously injected, but the solenoid valve 20 of the exhaust pipe 18 can be controlled in conjunction with water level detection. This is done by opening the electromagnetic valve 20 to exhaust air when the water level reaches the position of the water level detection electrode 26.
When it reaches the position, the solenoid valve 20 is closed to stop the exhaust, and the water level in the accumulator 15 can be controlled within a certain range.

(When the carbon dioxide concentration is from 95% to 50%) When the carbon dioxide concentration is 95% or less, there is a sufficient amount of air, so there is no need to supply air. In this case, either the recycling method or the exhaust method described above may be adopted, and the selection may be made depending on the application. Here, if you want to increase the dissolution efficiency of carbon dioxide gas in the shortest possible time (increase the yield), you can consider a method that combines the following recycling method and exhaust method. This system operates in a recycling manner while the supplied carbon dioxide gas is initially high in concentration, and when the carbon dioxide gas dissolves first and most of the remaining gas becomes air (there is almost no carbon dioxide in the residual gas). However, when the water level reaches the water level detection electrode 25, the exhaust is stopped, and when the water level falls to the water level detection electrode 26, the gas supply is stopped and recycled. By repeating this process, fine bubble carbonated spring is produced.

As described above, the optimum dissolution system differs depending on the concentration of carbon dioxide gas supplied, and the concentration of carbon dioxide gas supplied may not always be constant but may vary. Even in such a case, if the concentration of carbon dioxide gas to be supplied is known, the system can be operated with an optimal operating system. Therefore, in the present invention, the carbon dioxide concentration substitute detection means 2 is used to substitutely know the concentration of carbon dioxide gas supplied to the micro bubble generator 1 by the dissolution time of the gas, and the carbon dioxide concentration substitute detection means 2 is used as a substitute. The microbubble generating device 1 is provided with a control unit 3 for controlling the dissolution system of the microbubble generator 1 in accordance with the carbon dioxide concentration determined in detail. In the embodiment shown in the accompanying drawings, the concentration of carbon dioxide gas to be supplied can be determined by the dissolution time of the gas in the following manner.

First, when gas is first supplied, a certain amount of air is supplied by controlling the solenoid valves 11 and 12 on the air supply side, and the gas is recycled. In this case, the initial state of the accumulator may not be constant, so
Because it is necessary to match the initial conditions, the system may be operated for a certain period of time without supplying gas at the beginning of the operation. Alternatively, it is also conceivable to initially operate in the exhaust mode for a while, then supply air until the water level reaches the position of the water level detection electrode 26, and set this position as the initial state. Then, from the reference water level determined by each setting, the water level detection electrode 2
By measuring the time it takes for the water to return to level 5, it is possible to know the concentration of carbon dioxide that is substituted. This takes advantage of the difference in the rate of dissolution of carbon dioxide and air into water; the higher the concentration of carbon dioxide, the faster the rate of dissolution and the shorter the time required for the water level to rise. By preprogramming the system to operate the micro bubble generator 1 according to this time and the supplied carbon dioxide concentration and storing it in the microcomputer that is the control unit 3, the initial recycling time can be used as a substitute. This means that the system can be operated with the optimum system according to the carbon dioxide concentration determined. Therefore, in this embodiment, the water level detection electrodes 25, 2
The means for checking the water level rise time for 6 hours serves as the carbon dioxide concentration substitute detection means 2 for knowing the concentration of supplied carbon dioxide by proxy by the dissolution time of the gas. Sampling of the water level rise time may not only be performed at the first time, but may also be performed at an appropriate time using a timer (for example, every 10 minutes,
every 30 minutes, etc.)

Note that, as in the embodiment, the water level detection electrode 25,
In the carbon dioxide concentration substitute detection means 2 for detecting the concentration of supplied carbon dioxide by proxy of the gas dissolution time, the means for checking the water level rise time for 26 hours is
The water level detection circuit, the timer, and the microcomputer serving as the control section 3 can be combined, so it is relatively inexpensive. 30 in the figure
3 is a sensor input section provided in the control section 3, and 31 is a solenoid valve output section. Further, 32 is a common electrode for water level detection.

[0017]

[Effects of the Invention] As described above, in the present invention, gas and liquid are mixed and pressurized to dissolve the gas in the liquid, and the liquid in which the gas has been dissolved is depressurized again to form fine bubbles. In the micro bubble generator for precipitation, there is a carbon dioxide concentration substitute detection means for knowing the concentration of the supplied carbon dioxide gas by proxy based on the dissolution time of the gas, and a carbon dioxide concentration substitute detection means for detecting the carbon dioxide concentration substituted by the carbon dioxide concentration substitute detection means. Since it is equipped with a control unit to control the dissolution system of the micro bubble generator according to the concentration, it is possible to operate the system with the optimum system for the concentration regardless of the concentration of carbon dioxide gas supplied. To know the carbon dioxide concentration,
Since the concentration of carbon dioxide supplied by the carbon dioxide concentration surrogate detection means is determined by the dissolution time of the gas, there is no need for an expensive carbon dioxide sensor that requires adjustment, and it is not necessary to periodically sample the supplied gas. Since the system can be operated while monitoring the supplied gas, even if the concentration of carbon dioxide gas supplied during operation changes, the system can always operate under optimal conditions. This enables operation in optimal conditions. Further, an expensive carbon dioxide concentration sensor that requires calibration or the like is not required.

[Brief explanation of drawings]

FIG. 1 is a system diagram of one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the accumulator same as above.

[Explanation of symbols]

1. Micro bubble generator 2 Substitute detection means for carbon dioxide concentration 3 Control section

Claims (1)

[Claims] [Claim 1] In a micro-bubble generator that mixes gas and liquid and pressurizes the gas to dissolve the gas in the liquid, and then depressurizes the liquid in which the gas is dissolved again to precipitate micro-bubbles, the supplied carbonic acid A carbon dioxide concentration surrogate detection means for knowing the gas concentration by proxy by the gas dissolution time, and a dissolution system of a micro bubble generator according to the carbon dioxide concentration substituted by the carbon dioxide concentration surrogate detection means. 1. A micro-bubble carbonated spring manufacturing device, comprising: a control section for controlling the carbonated spring.