JP7350564B2 - Gas-liquid mixing device - Google Patents

Description

The present invention relates to an apparatus for mixing gas with liquid.

2. Description of the Related Art Conventionally, for the purpose of promoting beauty and health, devices have been used that mix gases such as carbon dioxide gas with liquid hot water and release the mixture. Prior art documents related to this type of gas-liquid mixing device include, for example, Patent Document 1 below. Patent Document 1 describes, as a specific example of a gas-liquid mixing device, a carbonated spring generating device that dissolves and releases carbon dioxide gas in hot water.

JP2017-109186A

However, in conventional gas-liquid mixing devices, including the carbonated spring generating device described in Patent Document 1, a large volume is required for a portion that mixes gas and liquid. For example, in the case of the carbonated spring generating device described in Patent Document 1, each part such as a first on-off valve and a second on-off valve each having a plurality of pressure-sensitive chambers, and a carbon dioxide dissolving section requires a considerable volume. As a result, the overall size of the device has increased, which has been a hindrance to installing the gas-liquid mixing device in stores and households.

In view of these circumstances, the present invention aims to provide a gas-liquid mixing device that has a compact configuration and is capable of efficiently mixing gas with liquid.

The present invention includes a gas-liquid mixing section in the middle of a channel through which liquid flows, and the gas-liquid mixing section is set to have a smaller channel diameter than the inlet-side channel and the outlet-side channel. a narrow diameter portion connecting the flow path and the outlet side flow path; and a gas introduction path having one end opened outside the flow path through which the liquid flows and the other end opened so as to face the input side flow path. The gas introduction path has one end connected to a gas intake pipe that supplies gas, and the other end connected to a dissipation section, the dissipation section being installed in a flow path through which the liquid flows, and the gas introduction path The gas-liquid mixing section includes a porous body that discharges the gas drawn from the pipe into the liquid as bubbles, and the flow path diameters of the inlet side and the outlet side of hot water W in the gas-liquid mixing section are each 5 mm or more and 50 mm or less, and The gas-liquid mixing device is characterized in that the cross-sectional area of the passage in the entry side portion is 1.5 times or more and not more than 5 times the cross-sectional area of the passage in the narrow diameter portion .

The gas-liquid mixing device of the present invention may be configured such that one end of the gas introduction path opens at a side surface of the gas-liquid mixing section.

In the gas-liquid mixing device of the present invention, the gas-liquid mixing section includes an inlet side part forming an inlet flow path, and the other end of the gas introduction path is the front side of the inlet side part when viewed from the axial direction. The narrow diameter portion may be provided so as to surround the other end of the gas introduction path and avoid the position of the gas introduction path.

In the gas-liquid mixing device of the present invention, the gas lead-in pipe includes a pressure guiding channel that guides the pressure in the channel through which the liquid flows, a pressure detecting section that operates according to the pressure of the guiding pressure channel, and a pressure detecting section that operates according to the pressure of the guiding pressure channel. A gas flow path opening/closing valve may be provided that includes a valve body that opens and closes the flow path formed by the gas lead-in pipe according to the operation of the pressure section.

In the gas-liquid mixing device of the present invention, the gas-liquid mixing section includes a hydraulic output path having one end opened outside the flow path through which the liquid flows, and the other end opened so as to face the flow path on the outlet side. , and one end of the hydraulic pressure output path can be configured to be connected to the pressure guiding flow path.

In the gas-liquid mixing device of the present invention, the gas-liquid mixing section includes an outlet portion forming an outlet flow path, and the other end of the hydraulic pressure output path is arranged as viewed from the axial direction of the outlet portion. It can be configured to open at the center of the front.

In the gas-liquid mixing device of the present invention, a gas flow rate adjusting section for adjusting the gas flow rate is provided in the middle of the gas lead-in pipe, and a gas flow rate adjusting part is provided downstream of the gas flow rate adjusting part to adjust the flow rate of the gas flowing through the gas lead-in pipe. A pressure gauge for detecting pressure can be provided.

In the gas-liquid mixing device of the present invention, the liquid can be hot water.

In the gas-liquid mixing device of the present invention, the gas may be carbon dioxide.

According to the gas-liquid mixing device of the present invention, the excellent effect of efficiently mixing gas with liquid with a compact configuration can be achieved.

1 is an overall configuration diagram showing an example of a form of a gas-liquid mixing device according to an embodiment of the present invention. FIG. 2 is an enlarged view showing a gas-liquid mixing section which is a main part of FIG. 1. FIG. 3 is a view corresponding to the III-III arrow in FIG. 2. FIG. 4 is a cross-sectional view of the gas-liquid mixing device, corresponding to the IV-IV arrow view in FIG. 3. FIG. 4 is a sectional view of another cross section of the gas-liquid mixing device, and is a view corresponding to the VV arrow direction in FIG. 3. FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an example of the form of a gas-liquid mixing device according to the present invention. The gas-liquid mixing device 1 of this embodiment includes a liquid flow pipe 2 that extends from a liquid inlet 2a to a liquid outlet 2b and constitutes a flow path through which hot water W as a liquid flows, and a liquid flow pipe 2 that supplies gas G to the liquid flow pipe 2. It is equipped with a gas inlet pipe 3 for guiding.

A pipe (not shown) is connected to the liquid inlet 2a, from which hot water W is supplied to the liquid distribution pipe 2. Further, a hose, a shower head, etc. (not shown) are connected to the liquid outlet 2b, so that the hot water W that has passed through the liquid distribution pipe 2 is discharged from here.

The liquid distribution pipe 2 branches into branch pipes (a first branch pipe 4 and a second branch pipe 5) on the way from the liquid inlet 2a to the liquid outlet 2b, and the branch pipes 4 and 5 are connected to the liquid outlet 2b. They are reuniting in the foreground. A three-way valve 6 as a flow path switching section is provided at the branch point of the liquid distribution pipe 2 to the branch pipes 4 and 5, and the flow path of the hot water W flowing downstream from the liquid inlet 2a is connected to the first branch pipe. 4 and the second branch pipe 5.

No pipes other than the liquid distribution pipe 2 are connected to the first branch pipe 4, but a gas lead-in pipe 3 is connected to the second branch pipe 5, and the gas G supplied from the gas lead-in pipe 3 is connected to the second branch pipe 5. It is designed to be mixed with hot water W. That is, the flow path switching unit (three-way valve) 6 is a part that performs an operation for switching between discharging the hot water W as it is from the liquid outlet 2b or discharging the mixture of the hot water W and the gas G.

The gas intake pipe 3 has an inlet end connected to a gas cylinder 7 serving as a gas supply section, and an outlet end connected to a second branch pipe 5 of the liquid flow pipe 2 . For example, carbon dioxide gas is sealed in the gas cylinder 7 , and the gas intake pipe 3 guides the carbon dioxide gas G to the liquid flow pipe 2 .

A connection portion between the outlet end of the gas intake pipe 3 and the second branch pipe 5 is configured as a gas-liquid mixing portion 8 . The gas-liquid mixing unit 8 is a component having a structure as shown in FIGS. 2 to 5, and is installed in the middle of the liquid distribution pipe 2 to form a part of the flow path for the hot water W. It has a function of mixing the drawn-in carbon dioxide gas G into the hot water W, and the carbon dioxide gas G can be efficiently mixed into the hot water W with a compact configuration.

The gas-liquid mixing section 8 has a substantially cylindrical shape as a whole, and has a flow path through which hot water W flows in the axial direction and a flow path through which carbon dioxide gas G is drawn in. As a flow path for the hot water W, an inlet side part 8a on the inlet side, an outlet side part 8b on the outlet side, and a narrow diameter part 8c connecting the inlet side part 8a and the outlet side part 8b are provided. The inlet side part 8a is a part forming an inlet side flow path in the gas-liquid mixing part 8, and is a cylindrical hole provided so as to be depressed axially inward from the inlet side end surface. The outlet part 8b is a part that forms a flow path on the outlet side of the gas-liquid mixing part 8, and is a cylindrical hole provided so as to be depressed axially inward from the end face on the outlet side. The central axes of the inlet side part 8a and the outlet side part 8b coincide with the central axis of the gas-liquid mixing part 8 itself.

The narrow diameter portion 8c has a front surface (inner side surface) of the inlet side portion 8a viewed in the axial direction from the inlet side of the gas-liquid mixing portion 8, and a front surface (inner side surface) of the outlet side portion 8b viewed in the axial direction from the outlet side. In this embodiment, six narrow diameter portions 8c are provided so as to surround the central axis of the gas-liquid mixing portion 8.

Here, the flow path cross-sectional area of the hot water W flow path formed by the narrow diameter portion 8c (in the example shown here, the total cross-sectional area of the six narrow diameter portions 8c) is the flow path of the inlet side portion 8a. It is best to set it smaller than the road cross-sectional area. In this way, when hot water W tries to flow from the inlet side portion 8a to the narrow diameter portion 8c, the pressure increases in front of the narrow diameter portion 8c because the flow path is narrowed. By arranging a dissipating section 9, which will be described later, at a position in front of this narrow diameter section 8c, carbon dioxide gas G is supplied to the high-pressure hot water W, and efficient dissolution of carbon dioxide gas G is achieved.

Specifically, it is designed so that the cross-sectional area of the flow path in the inlet side portion 8a is 1.5 times or more and 5 times or less, more preferably 2 times or more and 4 times or less, than the flow path cross-sectional area in the narrow diameter portion 8c. That's good. If the ratio of the entrance side part 8a to the narrow diameter part 8c is small, sufficient dissolution efficiency of carbon dioxide gas G may not be obtained. On the other hand, if the ratio of the entrance side part 8a to the narrow diameter part 8c is too large, There is a possibility that the pressure loss before and after the diameter portion 8c is too large, causing a problem in the supply of hot water W from the liquid outlet 2b. Further, since there is an upper limit to the amount of carbon dioxide gas G dissolved, even if the pressure on the near side of the narrow diameter portion 8c is increased too much, the dissolution efficiency of carbon dioxide gas G will not increase by that amount.

In addition, in order to make the entire gas-liquid mixing section 8 compact while ensuring the dissolution efficiency of carbon dioxide gas G and the supply amount of hot water W as described above, it is necessary to The side flow path diameter (inner diameter of the inlet side part 8a and the outlet side part 8b) is preferably 5 mm or more and 50 mm or less, more preferably 7 mm or more and 25 mm or less.

The gas introduction path 8d is a flow path that has one end open on the outside of the flow path through which the hot water W flows, and the other end opened so as to face the flow path. In the case of this embodiment, one end of the gas introduction path 8d is located on the side surface of the gas-liquid mixing section 8, and the other end is located on the inlet side section 8a, and the gas introduction path 8d connects these two ends. It is provided inside the gas-liquid mixing section 8 in an L-shape. In addition, the side surface of the gas-liquid mixing part 8 here refers to the surface surrounding it with the flow direction of hot water W as an axis. In the case of this embodiment, one end of the gas introduction path 8d is located on the upper surface of the gas-liquid mixing section 8 in FIGS. 2 to 5.

The outlet side of the gas lead-in pipe 3 is connected to one end of the gas introduction path 8d opened on the side surface of the gas-liquid mixing section 8 (see FIG. 1). The other end of the gas introduction passage 8d opened to the inlet side part 8a is provided at the center of the front of the gas-liquid mixing part 8 when viewed from the axial direction, and the carbon dioxide drawn from the gas lead-in pipe 3 is A dissipation unit 9 is attached to dissipate gas G into hot water W as bubbles.

As shown in FIG. 2, the dissipation section 9 includes an attachment tube 9a whose one end is attached to the end of the gas introduction path 8d, and a porous body 9b attached so as to cover the opening at the other end of the attachment tube 9a. (In addition, in FIGS. 3 to 5, illustration of the dissipating section 9 is omitted for convenience of explanation). The dissipation section 9 is arranged with respect to the gas-liquid mixing section 8 so that the porous body 9b attached to the other end side of the attachment tube 9a protrudes upstream when viewed from the gas introduction path 8d. In this way, the porous body 9b is arranged so that the entire porous body 9b is located within the flow path of hot water W.

The porous body 9b is a solid material such as ceramic, which has countless fine pores with a diameter of about 3 μm or more and about 10 μm or less, communicating inside and outside. Carbon dioxide gas G is drawn in from the end of the attachment pipe 9a placed inside the porous body 9b, passes through countless pores in the porous body 9b, becomes fine bubbles, and is dissipated into the hot water W. .

In this way, the gas introduction path 8d has an inlet at one end facing the outside of the gas-liquid mixing section 8 and an outlet at the other end facing the flow path for the hot water W, so that the carbon dioxide gas G led from the gas lead-in pipe 3 is introduced into the hot water W. It is now being introduced. Here, in this embodiment, the gas-liquid mixing part 8 is further made compact by setting the position of one end of the gas introduction path 8d that forms the connection part with the gas lead-in pipe 3 on the side surface of the gas-liquid mixing part 8. We are trying to Then, the carbon dioxide gas G drawn into the flow path of the hot water W from the gas introduction path 8d passes through the porous body 9b of the dissipation part 9, becomes fine bubbles, and comes into contact with the hot water W. Mix well and dissolve.

The hydraulic pressure output path 8e is a flow path that has one end open to the outside of the flow path through which the hot water W flows, and the other end opened to face the flow path. In the case of this embodiment, one end of the hydraulic pressure output path 8e is located on the side surface of the gas-liquid mixing section 8, and the other end is located on the outlet side section 8b, and the hydraulic pressure output path 8e connects these two ends. It is provided in an L-shape inside the gas-liquid mixing section 8. One end of the hydraulic pressure output path 8e is located on the upper surface of the gas-liquid mixing section 8 in FIGS. It is located in the center of the front as seen. One end of a hydraulic pressure output path 8e opened on the side surface of the gas-liquid mixing section 8 is connected to an end of a pressure guidance path 12c (see FIG. 1), which will be described later. The pressure is transmitted from the side portion 8b to the gas passage opening/closing valve 12 via the pressure passage 12c.

In this embodiment, the gas-liquid mixing section 8 is provided with a hydraulic pressure output path 8e that forms a connection with the pressure guiding path 12c. The configuration is compact. That is, in order to transmit the pressure of the hot water W to the gas flow path on-off valve 12, the hot water W is transferred from another position in the flow path (for example, upstream or downstream of the gas-liquid mixing section 8 in the second branch pipe 5). It is also possible to guide the gas flow path to the on-off valve 12, but in this case, another part is required at the connection between the hot water flow path and the pressure-coupling flow path 12c, which increases the number of parts and makes the layout difficult. The size and compactness are lost. Therefore, in this embodiment, the overall structure is made more compact by providing the gas-liquid mixing section 8 with the function of a connection section with the pressure-driven channel 12c.

Furthermore, in this embodiment, as described above, the gas-liquid mixing section 8 is provided with six narrow-diameter sections 8c, but these are not provided evenly around the central axis of the flow path, but at the same time. The arrangement is slightly biased in the direction (downward), and a portion where the narrow diameter portion 8c is not provided is set in a part of the circumferential direction (around the 0 degree position in FIG. 3). This arrangement is such that the narrow diameter portion 8c does not intersect with the gas introduction path 8d and the hydraulic pressure output path 8e. That is, as explained above, the gas introduction path 8d and the hydraulic pressure output path 8e both have one end open to the side surface on the side of the gas-liquid mixing section 8, and the other end to the inlet side part 8a or the outlet side part. 8b is an L-shaped flow path provided in the center of the front side when viewed from the axial direction, and as shown in FIG. occupies a portion of Therefore, the narrow diameter part 8c connecting the inlet side part 8a and the outlet side part 8b is surrounded by the gas introduction path 8d and the other end of the hydraulic pressure output path 8e, which are opened at the center of the inlet side part 8a and the outlet side part 8b. In order to avoid the positions of the gas introduction path 8d and the hydraulic pressure output path 8e, they are not provided around the 0 degree position in FIG. 3. By doing so, the gas introduction path 8d and the narrow diameter portion 8c can be arranged in one component (the gas-liquid mixing section 8), and the configuration for mixing gas and liquid can be made even more compact. Furthermore, by arranging the liquid pressure output path 8e in the same gas-liquid mixing section 8, the structure for transmitting the pressure of the hot water W flowing through the flow path to the gas flow path opening/closing valve 12 can also be made compact. It is possible to fit it into . In addition, as will be described later, the hot water W that has passed through the narrow diameter portion 8c is ejected from uneven positions at the outlet side portion 8b, resulting in turbulent flow on the outlet side of the gas-liquid mixing portion 8, and air bubbles are generated. You can also expect it to be easier.

As shown in FIG. 1, a constant flow valve 10 is provided in the middle of the gas lead-in pipe 3 as a gas flow rate adjustment section that adjusts the flow rate of carbon dioxide gas G flowing therethrough to a constant amount. On the other hand, in the middle of the second branch pipe 5, a constant flow valve 13 is provided as a liquid flow rate adjustment section that adjusts the flow rate of the hot water W flowing therethrough to a constant amount. That is, the constant flow valve 13 provided in the second branch pipe 5 allows a constant flow rate of hot water W to flow through the second branch pipe 5, and at the same time, the constant flow valve 13 provided in the gas intake pipe 3 The constant flow valve 10 supplies a constant flow rate of carbon dioxide gas G to the second branch pipe 5. Thereby, when hot water W is passed through the second branch pipe 5, the concentration of carbon dioxide gas G in the hot water W supplied from the liquid outlet 2b can be automatically maintained at a specified value.

In the example shown here, the position of the liquid flow rate adjustment section (constant flow valve) 13 is set on the downstream side of the gas-liquid mixing section 8 in the second branch pipe 5. This is to ensure the pressure on this side of the narrow diameter portion 8c of the gas-liquid mixing portion 8. That is, if the constant flow valve 13 is provided upstream of the gas-liquid mixing section 8, the hot water W passing through the constant flow valve 13 and having a constant flow rate will flow into the gas-liquid mixing section 8. , there is a possibility that sufficient pressure for dissolving the carbon dioxide gas G may not be secured in the portion where the dissipation portion 9 is provided on the near side of the narrow diameter portion 8c. Further, since the pressure of hot water W at the outlet side 8b of the gas-liquid mixing section 8 is used to operate the gas flow path opening/closing valve 12, which will be described later, a constant flow valve 13 is disposed upstream of the gas-liquid mixing section 8. If it is stored away, it is conceivable that opening and closing of the gas flow path on-off valve 12 will also be hindered.

Note that the constant flow valve 13 may be installed at the downstream side of the gas-liquid mixing section 8 in the second branch pipe 5, but if the constant flow valve is installed at that position, It should be noted that even when hot water W is discharged (without mixing carbon dioxide gas G), the flow rate of hot water W is adjusted to a constant value.

Further, a pressure gauge 11 is provided downstream of the constant flow valve 10, so that the pressure of the carbon dioxide gas G flowing downstream of the constant flow valve 10 can be detected. With this pressure gauge 11, it is possible to grasp the usage status and remaining amount of carbon dioxide gas G, as will be described later.

Further, downstream of the pressure gauge 11, a gas flow path opening/closing valve 12 is provided to switch the supply or non-existence of carbon dioxide gas G depending on the presence or absence of the flow of hot water W in the second branch pipe 5. The gas flow path opening/closing valve 12 includes a pressure detection part 12a that operates according to pressure applied from the outside, a valve body 12b that opens and closes a flow path for carbon dioxide gas G formed by the gas intake pipe 3, and a second branch. It is provided with a pressure guiding flow path 12c that guides the pressure of hot water W flowing through the pipe 5 to a pressure detection part 12a.

The pressure detection unit 12a is equipped with a mechanism that detects external pressure using an elastic body such as a spring and outputs it as movement, and when the pressure input to one input unit exceeds a threshold value. In this case, the elastic body is pushed and deformed by the pressure, so that the output portion on the other side protrudes outward. The pressure detection section 12a is connected to the hydraulic pressure output path 8e of the gas-liquid mixing section 8 via the pressure guiding channel 12c. When the hot water W flows through the second branch pipe 5, the pressure of the hot water W flowing through the outlet section 8b of the gas-liquid mixing section 8 is transmitted from the pressure guiding channel 12c to the input section of the pressure detection section 12a. When the pressure of hot water W reaches a threshold value or more, the output section of the pressure detection section 12a is activated.

A valve body 12b is adjacent to the output section side of the pressure detection section 12a. The valve body 12b operates according to the operation of the output part of the pressure detection part 12a, and when the output part does not protrude, it blocks the flow path of carbon dioxide gas G, and when the output part protrudes, it closes the flow path of the carbon dioxide gas G. It moves when pushed and opens the flow path for carbon dioxide gas G.

That is, the gas flow path opening/closing valve 12 closes the flow path of carbon dioxide gas G with the valve body 12b while hot water W is not flowing through the second branch pipe 5, and the gas flow path opening/closing valve 12 closes the flow path of carbon dioxide gas G while hot water W is not flowing through the second branch pipe 5. When the pressure reaches a threshold value or more, the flow path for carbon dioxide gas G is opened. Thereby, the carbon dioxide gas G is supplied to the gas-liquid mixing section 8 only while the hot water W is flowing through the second branch pipe 5 and the gas-liquid mixing section 8.

Next, the operation of the above embodiment will be explained.

When hot water W is supplied to the liquid inlet 2a, the hot water W passes through the liquid flow pipe 2 and is discharged from the liquid outlet 2b. At this time, by operating the three-way valve 6, the flow path of hot water W can be switched between the first branch pipe 4 and the second branch pipe 5. When the hot water W is passed through the first branch pipe 4, the hot water W is discharged as it is from the liquid outlet 2b, but when it is passed through the second branch pipe 5, carbon dioxide gas G supplied from the gas intake pipe 3 is released. are mixed in the gas-liquid mixing section 8 and then discharged from the liquid outlet 2b.

That is, when the hot water W is passed through the second branch pipe 5, the pressure of the hot water W is generated in the flow path in the gas-liquid mixing part 8, and the pressure in the outlet side part 8b is applied to the gas flow path opening/closing valve through the pressure guiding flow path 12c. The pressure is transmitted to the pressure detection section 12a of No. 12. When the pressure reaches the threshold value or more, the valve body 12b operates to open the flow path for the carbon dioxide gas G, and the carbon dioxide gas G is supplied from the gas intake pipe 3 to the gas-liquid mixing section 8.

In the gas-liquid mixing section 8, carbon dioxide gas G is drawn into the inlet side section 8a from the gas introduction path 8d, and is dissipated into the hot water W from the porous body 9b of the dissipation section 9 (see FIG. 2). In the gas-liquid mixing section 8, when the hot water W tries to flow into the narrow diameter section 8c, the pressure of the hot water W increases on the near side of the narrow diameter section 8c due to the difference in the cross-sectional areas of the flow paths. By supplying the carbon dioxide gas G from the dispersion unit 9 here, the carbon dioxide gas G is efficiently dissolved in the hot water W.

Here, in order for the carbon dioxide gas G to be supplied to the hot water W, the pressure of the carbon dioxide gas G must naturally be high enough to resist the pressure of the hot water W. Moreover, in order to obtain dissolution efficiency, the pressure of carbon dioxide gas G needs to be sufficiently high. On the other hand, since there is an upper limit to the amount of carbon dioxide gas G that can be dissolved in hot water W, even if the pressure is increased beyond a certain level, the dissolution efficiency of carbon dioxide gas G will not increase accordingly. Specifically, the pressure of the carbon dioxide gas G fed into the gas-liquid mixing section 8 is preferably about 0.3 mPa or more and 0.5 mPa or less.

In this way, on the upstream side of the gas-liquid mixing section 8, the carbon dioxide gas G is mixed with the hot water W and dissolved. Hot water W mixed with carbon dioxide gas G flows from the inlet side part 8a to the narrow diameter part 8c, and exits to the outlet side part 8b. Here, as described above, the narrow diameter portions 8c are provided unevenly in the circumferential direction of the flow path and are eccentric with respect to the central axis. When the hot water W is discharged from the narrow diameter portion 8c arranged in this way to the outlet side portion 8b, turbulence is generated in the outlet side portion 8b due to the uneven flow of the hot water W. As a result, a portion of the carbon dioxide gas G dissolved on the upstream side is vaporized, and countless fine bubbles (microbubbles) are generated. The hot water W passing through the second branch pipe 5 is discharged from the liquid outlet 2b in a state containing a large amount of microbubbles of carbon dioxide gas G.

Hot water W containing microbubbles exhibits a high cleaning effect when used for washing the human body or hair. In other words, when microbubbles enter irregularities such as pores on the skin, the stirring power of hot water W containing microbubbles breaks down dirt such as sebum and deposits such as medicine, and furthermore, the action of static electricity etc. causes them to become microscopic. It is absorbed by the bubbles and washed away with hot water. In this way, dirt can be removed without using detergents such as soap or shampoo.

Furthermore, when the microbubbles attached to the surface of the human body burst, physical stimulation is applied to the skin, thereby providing a massage effect on the skin and muscles.

Furthermore, when carbon dioxide gas is used as the gas G as in this embodiment, a detox effect and a thermal effect due to dilation of blood vessels are also produced. That is, when hot water W containing carbon dioxide gas G is brought into contact with the skin, carbon dioxide gas is absorbed into the blood vessels, creating a blood condition similar to that immediately after exercise, which dilates the capillaries and removes waste products within the blood vessels. In addition to promoting the excretion of water, body temperature also rises due to increased blood flow.

In addition, since hot water W (carbonated water) containing carbon dioxide gas G is acidic, it has the effect of neutralizing alkaline chemicals used in permanents and hair coloring, tightening the hair cuticle, and improving stiffness. be. When performing treatments such as permanent hair or hair coloring at a beauty salon, using carbonated water to wash after the treatment will not only neutralize the chemicals and repair damage to the hair, but also remove any chemicals that may have adhered to the hands of the practitioner. It is also possible to neutralize the drug and prevent your hands from getting rough.

In the case of this embodiment, the constant flow valve 10 is provided in the middle of the gas lead-in pipe 3, and the constant flow valve 13 is provided in the middle of the second branch pipe 5. When hot water W is passed through, the concentration of carbon dioxide gas G in the hot water W supplied from the liquid outlet 2b is automatically maintained at a specified value. It is assumed that hot water W is supplied from the liquid inlet 2a at various water pressures depending on the installation environment. By doing so, you can obtain carbonated water with a specified concentration regardless of the water pressure in the installation environment. For example, even if the gas-liquid mixing device 1 is to be installed in a home or the like, there is no need to adjust the water pressure, and anyone can easily install it.

Furthermore, the gas-liquid mixing device 1 of this embodiment is equipped with a constant flow valve 10 as a gas flow rate adjustment section in the middle of the gas intake pipe 3, and a pressure gauge 11 on the downstream side thereof. By referring to the value indicated by , it is possible to grasp the usage status and remaining amount of carbon dioxide gas G. That is, when there is a residual amount of carbon dioxide gas G in the gas cylinder 7 and the carbon dioxide gas G is not supplied from the gas cylinder 7 to the hot water W, the pressure gauge 11 shows a constant value, but the supply of carbon dioxide gas G is started. Since the pressure value indicated by the pressure gauge 11 decreases by that amount, it can be confirmed that the carbon dioxide gas G is being supplied. When hot water W is supplied from a shower head or the like, it is usually difficult to determine whether gas G is mixed in the hot water W, and whether gas G is carbon dioxide gas even if gas G is mixed in hot water W. , it is difficult to confirm from the state of hot water W. However, if the gas intake pipe 3 is equipped with the constant flow valve 10 and the pressure gauge 11 as in this embodiment, it is possible to easily confirm that the carbon dioxide gas G is mixed with the hot water W.

Further, the gas cylinder 7 is made of opaque metal, and the remaining amount cannot be checked from the outside. If the remaining amount of carbon dioxide gas G runs out, naturally the supply of carbon dioxide gas G to hot water W will stop, but from the condition of hot water W, it is important to check whether carbon dioxide gas G is mixed. As mentioned above, it is difficult. This makes it impossible to easily know when to replace the gas cylinder 7. Of course, this could be done by measuring the weight of the gas cylinder 7, but it would be troublesome since it would be necessary to remove the gas cylinder 7 each time for confirmation. However, if the pressure gauge 11 is provided in the middle of the gas lead-in pipe 3 as in this embodiment, it is possible to confirm that the supply of carbon dioxide gas G has stopped when the pressure value indicated by the pressure gauge 11 becomes zero. . In this way, it is possible to easily and appropriately know whether there is any remaining amount of carbon dioxide gas G and when to replace the gas cylinder 7.

As described above, the gas-liquid mixing device 1 of the present embodiment includes the gas-liquid mixing section 8 in the middle of the flow path through which the liquid W flows, and the gas-liquid mixing section 8 includes the inlet side flow path and the outlet side flow path. A narrow diameter portion 8c is set to have a smaller diameter than the side flow path and connects the inlet side flow path and the outlet side flow path, and one end is opened outside the flow path through which the liquid W flows, and the inlet side The gas introduction passage 8d is provided with a gas introduction passage 8d whose other end is open so as to face the side flow passage, and the gas introduction passage 8d is connected to one end of the gas intake pipe 3 for supplying gas, and has a dispersion section 9 at the other end. The dissipation section 9 is installed in a flow path through which the liquid W flows, and includes a porous body 9b that discharges the gas G drawn in from the gas intake pipe 3 into the liquid W as bubbles. In this way, the gas-liquid mixing section 8 having a compact configuration can efficiently mix the gas G with the liquid W.

Furthermore, in the gas-liquid mixing device 1 of the present embodiment, one end of the gas introduction path 8d is open to the side surface of the gas-liquid mixing section 8. In this way, the configuration for mixing gas and liquid can be made even more compact.

In the gas-liquid mixing device 1 of this embodiment, the gas-liquid mixing section 8 includes an inlet part 8a forming an inlet flow path, and the other end of the gas introduction path 8d is connected to the axis of the inlet part 8a. The narrow diameter portion 8c opens at the center of the front as viewed from the direction, and is provided so as to surround the other end of the gas introduction path 8d and avoid the position of the gas introduction path 8d. In this way, the configuration for mixing gas and liquid can be made even more compact.

In addition, in the gas-liquid mixing device 1 of this embodiment, the gas lead-in pipe 3 includes a pressure passage 12c that guides the pressure in the flow passage through which the liquid W flows, and the pressure passage 12c operates according to the pressure of the pressure passage 12c. A gas passage opening/closing valve 12 is provided, which includes a pressure detection part 12a and a valve element 12b that opens and closes the passage formed by the gas intake pipe 3 according to the operation of the pressure detection part 12a. In this way, the gas G is supplied to the gas-liquid mixing section 8 only while the liquid W is flowing inside the gas-liquid mixing section 8.

Furthermore, in the gas-liquid mixing device 1 of this embodiment, the gas-liquid mixing section 8 has one end opened outside the flow path through which the liquid W flows, and the other end opened so as to face the flow path on the outlet side. A hydraulic pressure output path 8e is provided, and one end of the hydraulic pressure output path 8e is connected to a pressure guiding path 12c. In this way, by providing the liquid pressure output path 8e in the gas-liquid mixing section 8, which connects the pressure guiding path 12c to the flow path through which the liquid W flows, it is possible to The configuration can be made compact.

Further, in the gas-liquid mixing device 1 of the present embodiment, the gas-liquid mixing section 8 includes an outlet section 8b forming an outlet flow path, and the other end of the hydraulic pressure output path 8e is connected to the outlet section 8b. It opens in the center of the front when viewed from the axial direction. In this way, the structure for transmitting pressure to the gas flow path opening/closing valve 12 can be made even more compact.

In addition, the gas-liquid mixing device 1 of this embodiment is provided with a gas flow rate adjustment section 10 that adjusts the flow rate of the gas G in the middle of the gas intake pipe 3, and a gas flow rate adjustment section 10 that is provided downstream of the gas flow rate adjustment section 10. The pressure gauge 11 detects the pressure of the gas G flowing through the pipe 3. In this way, by referring to the value indicated by the pressure gauge 11, it is possible to grasp the usage status and remaining amount of the gas G.

Further, in the gas-liquid mixing device 1 of this embodiment, the liquid W is hot water.

Further, in the gas-liquid mixing device 1 of this embodiment, the gas G is carbon dioxide gas.

Therefore, according to this embodiment, gas can be efficiently mixed with liquid with a compact configuration.

It should be noted that the gas-liquid mixing device of the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

1 Gas-liquid mixing device 3 Gas lead-in pipe 8 Gas-liquid mixing part 8a Inlet side part 8b Outlet side part 8c Narrow diameter part 8d Gas introduction path 8e Hydraulic pressure output path 9 Dissipation part 9b Porous body 10 Gas flow rate adjustment part (constant flow rate valve)
11 Pressure gauge 12 Gas flow path opening/closing valve 12a Pressure detection unit 12b Valve body 12c Pressure flow path 13 Liquid flow rate adjustment unit (constant flow valve)
G gas (carbon dioxide)
W Liquid (hot water)

Claims (9)

A gas-liquid mixing section is provided in the middle of the flow path through which the liquid flows,
The gas-liquid mixing section is
a narrow diameter portion having a smaller flow path diameter than the inlet flow path and the outlet flow path, and connecting the inlet flow path and the outlet flow path;
a gas introduction channel, one end of which opens on the outside of the channel through which the liquid flows, and the other end of which opens so as to face the inlet channel;
The gas introduction path is
A gas inlet pipe that supplies gas is connected to one end,
A dissipating section is connected to the other end,
The dissipation part is
A porous body is installed in a flow path through which a liquid flows, and discharges gas drawn from the gas suction pipe into the liquid as bubbles ,
The flow path diameters of the inlet side and the outlet side of hot water W in the gas-liquid mixing part are each 5 mm or more and 50 mm or less,
A gas-liquid mixing device characterized in that a flow passage cross-sectional area in the inlet side portion is 1.5 times or more and 5 times or less than the flow passage cross-sectional area in the narrow diameter portion. The gas-liquid mixing device according to claim 1, wherein one end of the gas introduction path opens on a side surface of the gas-liquid mixing section. The gas-liquid mixing section includes an inlet side part forming an inlet flow path,
The other end of the gas introduction path opens at the center of the front of the inlet side part when viewed from the axial direction,
The gas-liquid mixing device according to claim 2, wherein the narrow diameter portion surrounds the other end of the gas introduction path and is provided so as to avoid the position of the gas introduction path. In the gas intake pipe,
a pressure channel that guides the pressure within the channel through which the liquid flows;
a pressure detection unit that operates according to the pressure of the pressure guiding channel;
Any one of claims 1 to 3, further comprising: a gas flow path opening/closing valve comprising: a valve body that opens and closes the flow path formed by the gas lead-in pipe according to the operation of the pressure detection section. The gas-liquid mixing device described in . The gas-liquid mixing section is
A hydraulic output path is provided, one end of which is open on the outside of the flow path through which the liquid flows, and the other end of which is opened so as to face the flow path on the outlet side;
The gas-liquid mixing device according to claim 4, wherein one end of the hydraulic pressure output path is connected to the pressure guiding flow path. The gas-liquid mixing section includes an outlet side part forming an outlet flow path,
6. The gas-liquid mixing device according to claim 5, wherein the other end of the hydraulic pressure output path opens at a central portion of the front of the outlet portion when viewed from the axial direction. In the middle of the gas intake pipe,
a gas flow rate adjustment section that adjusts the gas flow rate;
The gas-liquid according to any one of claims 1 to 6, further comprising a pressure gauge that is provided downstream of the gas flow rate adjustment section and detects the pressure of the gas flowing through the gas intake pipe. Mixing equipment. The gas-liquid mixing device according to any one of claims 1 to 7, wherein the liquid is hot water. The gas-liquid mixing device according to any one of claims 1 to 8, wherein the gas is carbon dioxide gas.

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