JP2010227780A - Gas dissolving apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas dissolving apparatus which can be made compact as a whole to save occupancy space and in which a dissolving tank is stably installed. <P>SOLUTION: The gas dissolving apparatus includes a fixing device 33 provided with a dissolving tank fixing part 38 for fixing the dissolving tank 2 provided in a gas dissolving part 32 and a pump fixing part 39 for fixing a pump 21, for which the pump fixing part is disposed below the dissolving tank fixing part. By fixing the dissolving tank to the dissolving tank fixing part of the fixing device and fixing the pump to the pump fixing part, the dissolving tank and the pump are vertically lined and arranged. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a gas dissolving device that generates fine bubbles in a liquid, such as generating fine bubbles in hot water stretched on a bathtub in order to enhance the effectiveness of bathing.

  As for the gas dissolution apparatus, the applicant has made many proposals so far. Among them, an improvement plan for a problem in installing a gas dissolving apparatus is proposed (Patent Document 1).

  That is, in Patent Document 1, a pump for discharging liquid from a discharge nozzle, a pedestal that supports the pump in a vertical position, and a leg member that supports the pedestal are vertically stacked in three stages. The gas dissolving apparatus provided in is described. By configuring the gas dissolving apparatus in this manner, the installation of the pump can be made compact. For example, in a fine bubble generating bathtub, it can be easily incorporated into the gap between the bathtub and the apron.

JP 2008-290037 A

  In the gas dissolving apparatus described in Patent Document 1, as described above, the pump, the gantry, and the leg members are vertically arranged in three stages, and the arrangement of the pumps is compact, contributing to space saving. is doing.

  However, if the gas dissolving apparatus is considered as a whole including a gas dissolving part that generates a liquid in which gas is dissolved, the gas dissolving apparatus described in Patent Document 1 is required to be further compact.

  This is because the gas-dissolving part is fixed by being connected to the pump arranged as described above via a piping system, so there is a layout restriction. It is also because the space occupied by the cylindrical body as a part, particularly a dissolution tank, tends to increase.

  Furthermore, with respect to the gas dissolving apparatus described in Patent Document 1, when the gas-liquid mixed fluid is injected, the cylindrical body becomes heavier than the pump, so that only by connecting and fixing to the pump via the piping system. There is concern about the case where the weight cannot be supported, and improvements are needed.

  The present invention has been made in view of the circumstances as described above, and provides a gas dissolving apparatus capable of accommodating the entire apparatus in a compact manner, further saving space, and stably installing a dissolution tank. It is an issue.

  The present invention has the following features in order to solve the above problems.

  A first aspect of the present invention is a gas dissolving apparatus comprising: a gas dissolving part that mixes a fluid flowing in a dissolving tank with a gas and generates a liquid in which the gas is dissolved; and a pump that supplies the fluid to the gas dissolving part. A fixing device having a dissolution tank fixing part for fixing a dissolution tank provided in the gas dissolving part and a pump fixing part for fixing a pump is provided, and the pump fixing part is disposed below the dissolution tank fixing part. A dissolution tank is fixed to the dissolution tank fixing part of the apparatus, and a pump is fixed to the pump fixing part, whereby the dissolution tank and the pump are vertically arranged in a row.

  According to a second invention, in the feature of the first invention described above, a dissolution tank fixing portion is disposed at an upper end portion of the fixing device, the dissolution tank fixing portion has a fixing surface portion, and the dissolution tank has a flange protruding outward. And the flange portion is placed on the fixed surface portion, and the dissolution tank is fixed to the dissolution tank fixing portion.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the gas supply port for taking in the gas sucked into the dissolution tank by the operation of the pump is provided on the wall surface of the exterior case in which the gas dissolution apparatus is installed. The gas supply port is in communication with outside air.

  According to the first aspect of the invention, the dissolution tank fixed to the dissolution tank fixing portion of the fixing device and the pump fixed to the pump fixing portion are arranged vertically in a vertical line, so that the gas dissolution portion is included. Further, the entire apparatus can be accommodated in a compact manner, and space saving is further promoted. Moreover, since the dissolution tank is fixed to the dissolution tank fixing part of the fixing device, the installation is stable.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the dissolution tank has a flange portion that protrudes outward at the outer peripheral portion thereof, and the dissolution tank fixing portion disposed at the upper end portion of the fixing device. Since it is mounted and fixed on the fixed surface part which has, the installation of a dissolution tank becomes reliable stably.

  According to the third aspect of the invention, in addition to the effects of the first or second aspect of the invention, the gas supply port is provided on the wall surface of the exterior case in which the gas dissolving device is installed, and communicates with the outside air. Air having a constant oxygen concentration can always be supplied into the dissolution tank, and the oxygen concentration in the fine bubbles existing in the hot water in the bathtub and the dissolved oxygen concentration in the hot water are stabilized.

It is the perspective view which showed one Embodiment of the gas dissolving apparatus of this invention. It is the block diagram which illustrated the fine bubble generation bathtub in which the gas dissolving apparatus shown in FIG. 1 was integrated. FIG. 2 is a partially cutaway perspective view showing a dissolution tank in a gas dissolving section provided in the gas dissolving apparatus shown in FIG. 1. FIG. 4 is a front view of the dissolution tank shown in FIG. 3. It is the longitudinal cross-sectional view seen from the back side of the dissolution tank shown in FIG. It is AA sectional drawing of the dissolution tank shown in FIG. It is BB sectional drawing of the dissolution tank shown in FIG. It is the principal part perspective view which showed the gas dissolving part and pump periphery in the gas dissolving apparatus shown in FIG. 1 from the back side. It is the disassembled perspective view shown about fixation of the pump to the fixing device in the gas dissolving apparatus shown in FIG. It is the principal part side view shown about installation to the bathroom of the gas dissolving apparatus shown in FIG.

  A gas dissolving apparatus 1 shown in FIG. 1 includes a hollow dissolution tank 2 having a slightly long and box-like shape, and a fluid flowing in the dissolution tank 2 is mixed with a gas to generate a liquid in which the gas is dissolved. A gas dissolving part 32 and a pump 21 for supplying a fluid to the gas dissolving part 32 are provided. The gas dissolving part 32 and the pump 21 are connected to the inflow pipe connecting part 12 provided in the dissolution tank 2 by connecting the other end of the inflow pipe 22 having one end connected to the discharge side 21b of the pump 21. Piping is connected, and the dissolution tank 2 and the pump 21 communicate with each other.

  The gas dissolving device 1 is provided with a fixing device 33 for fixing the dissolving tank 2 of the gas dissolving unit 32 and the pump 21. The fixing device 33 includes a support base part 34 and a base part 35. The support base part 34 fixes the dissolution tank 2 and the pump 21, and supports the main body part 36 rotatably with respect to the main body part 36 and the base part 35, and the installation height of the main body part 36 can be adjusted. And a leg portion 37. The leg portion 37 is connected to the lower end of the main body portion 36.

  The main body 36 is a box-shaped member having a substantially hexagonal shape in a front view and a sag downward, and the entire upper surface and front surface are open. A dissolution tank fixing part 38 for fixing the dissolution tank 2 is arranged at the upper end of the main body 36, and a pump fixing part 39 for fixing the pump 21 is arranged below the dissolution tank fixing part 38. Yes. The dissolution tank fixing part 38 has a fixing surface part 40 protruding outward in a flange shape at the upper end part of the main body part 36. In the pump fixing portion 39, as shown in FIG. 8, the lower surface of the main body portion 36 is a fixing surface 41.

  The base portion 35 is a member having a substantially truncated cone shape and a shape having a wide hem, and has a substantially annular installation surface portion 42 at a lower end portion. The leg portion 37 connected to the lower end of the main body portion 36 included in the support base portion 34 is, for example, a screw-type rotatable with respect to the base portion 35, and the installation height of the main body portion 36 is set according to the screwing depth. It can be adjustable. In this case, either one of the outer peripheral surface portion of the lower end portion of the leg portion 37 and the inner peripheral surface portion of the base portion 35 that receives the leg portion 37 can be provided with a male screw on one side and a female screw on the other side.

  Such a fixing device 33 is configured, for example, by placing the installation surface portion 42 of the base portion 35 on the floor surface of a room such as a bathroom, which will be described later, and adjusting the height of the main body portion 36 by the legs 37 to thereby dissolve the dissolution tank 2 and the pump 21 are arranged in a predetermined position. Since the dissolution tank 2 and the pump 21 are fixed to the main body 36, the damping material 43 can be provided between the installation surface portion 42 of the base portion 35 and the floor surface of the room. The vibration control material 43 can suppress the vibration accompanying the operation from propagating to the room or the like.

  It is also possible to form the base part 35 and the leg part 37 so as to be fitted to each other, and to fit the base part 35 and the leg part 37 with the vibration damping material 43 interposed therebetween. . Also in this case, the propagation of vibration is similarly suppressed.

  As shown in FIG. 9, the pump 21 is provided with, for example, four screw fixing portions 44 having a cylindrical shape and a female screw formed on the inner peripheral surface, which can be screwed to the outer peripheral portion. Yes. A screw hole 45 is formed in the fixing surface 41 at a predetermined position corresponding to the screw fixing portion 44 in the pump fixing portion 39 in the main body portion 36 of the support base portion 34 provided in the fixing device 33 so as to penetrate in the front-rear direction. Has been. The pump 21 is inserted into the main body 36 of the fixing device 33 stationary on the floor of the room from the front surface side to the rear surface side at the pump fixing portion 39, and is screwed through the screw hole 45 from the fixing surface 41 side. It is fixed to the pump fixing portion 39 of the fixing device 33 by a fixing member 46 such as a bolt screwed into the fixing portion 44. Even in the fixing of the pump 21 as described above, a vibration damping material can be interposed between the main body 36 of the support base 34 provided in the fixing device 33, and the propagation of vibration accompanying the operation of the pump 21 is suppressed. be able to. Further, a heat transfer body can be interposed between the main body 36 of the support base 34 and the pump 21. With the heat transfer body, the heat generated by the motor of the pump 21 can be radiated to the support base 34 to prevent overheating of the motor. Furthermore, the support base part 34 can be provided with a vent, and in this case, heat can be radiated from the vent.

  As shown in FIG. 1, the dissolution tank 2 provided in the gas dissolution unit 32 is provided with flange portions 19 and 20 that protrude outwardly on the outer peripheral portion near the lower end portion. The flange portion 19 is disposed on the flange portion 20, and the flange portions 19 and 20 overlap each other. As shown in FIG. 8, the dissolution tank 2 has the lower flange portion 20 overlaid on the fixing surface portion 40 of the dissolution tank fixing portion 38 in the main body portion 36 of the support base portion 34 provided in the fixing device 33. It is placed together. Along with the mounting, the part below the flange portion 20 of the dissolution tank 2 is inserted into the main body portion 36 from above. Then, the flange portion 20 and the fixing surface portion 40 are fastened together with the flange portion 19 by a fixing member such as a bolt at a predetermined portion, and the dissolution tank 2 is fixed to the dissolution tank fixing portion 38 of the fixing device 33. In such a fixed state, the dissolution tank 2 is arranged on the upper side of the pump 21 that is also fixed to the fixing device 33, and the dissolution tank 2 and the pump 21 are arranged vertically in the vertical direction. Even when the dissolution tank 2 is fixed, a vibration damping material is provided between the flange portion 20 and the fixed surface portion 40 so that vibrations generated with the generation of the liquid in which the gas is dissolved propagate to the fixing device 33. It can also be suppressed.

  Further, in the gas dissolving device 1, the gas circulation path 14 in which the one end portion 14a is connected to the upper wall portion 2a of the dissolving tank 2 provided in the gas dissolving portion 32 is connected to the inlet pipe 22 and the inlet pipe connecting portion in the other end portion 14b. 12 is connected to a gas circulation ejector 23 disposed at a connection portion with the gas. Further, one end portion of an outflow pipe 24 for supplying hot water in which air is dissolved to the bathtub 47 shown in FIG. 2 is connected to the outflow pipe connection portion 13 of the dissolution tank 2.

  The suction side 21 a of the pump 21 is connected to the other end of the suction pipe 25 that communicates with the bathtub 47 and has one end connected thereto. One end portion of the suction pipe 25 communicates with the suction port 26 communicating with the inside of the bathtub 47 in order to suck the hot water 48 in the bathtub 47, and the other end portion of the outflow pipe 24 connected to the outflow pipe connection portion 13. Communicates with the inside of the bathtub 47 and communicates with the discharge port 27 for discharging hot water in which the air is dissolved in the bathtub 47. FIG. 1 illustrates a suction / discharge plug 28 having both a suction port 26 and a discharge port 27. The suction / discharge plug 28 is attached to the tank wall portion of the bathtub 47, and includes a first flow path communicating from the suction port 26 to the suction pipe 25 and a second flow path communicating from the discharge port 27 to the outflow pipe 24. And. The first flow path and the second flow path are independent from each other in the suction / discharge plug 28 and do not communicate with each other.

  Further, in the gas dissolving device 1, the gas supply port 29 is provided in the dissolution tank in order to mix gas (air) with the fluid (hot water 48) introduced into the dissolution tank 2 through the inflow pipe 22 to generate a gas-liquid mixed fluid. The gas introduction ejector 30 is interposed near the connection portion between the suction side 21 a of the pump 21 and the suction pipe 25. The gas supply port 29 and the gas introduction ejector 30 are connected in communication via a gas introduction pipe 31.

  In the fine bubble generating bathtub 49 provided with such a gas dissolving device 1, as shown in FIG. 2, in the middle of the outflow pipe 24 that connects the outflow pipe connecting portion 13 and the discharge port 27 in communication, A venturi 50 serving as a pressure release portion is provided.

  In the fine bubble generating bathtub 49, the hot water 48 in the bathtub 47 is sucked from the suction port 26 by the operation of the pump 21, and sent out to the gas dissolving part 32 through the suction pipe 25 and the inflow pipe 22. In the gas dissolving section 32, the hot water 48 is jetted into the melting tank 2 and mixed with the air stored in the melting tank 2 or the air in the bathroom sucked from the gas supply port 29. Dissolve. Hot water 48 in which air is dissolved to a predetermined concentration flows out of the dissolution tank 2 through the outflow pipe connecting portion 13, and is sent out from the discharge port 27 into the bathtub 47 through the outflow pipe 24. The hot water 48 in which the air is dissolved is mixed with the hot water 48 stored in the bathtub 47, and at this time or after passing through the venturi 50, the air dissolved in the hot water 48 in the bathtub 47 or the venturi 50 as the pressure decreases. Precipitates to generate fine bubbles.

  The hot water 48 in the bathtub 47 circulates by the operation of the pump 21, and this circulation is repeated to increase the amount of bubbles in the hot water 48 in the bathtub 47, and the hot water 48 in the bathtub 47 becomes cloudy due to fine bubbles, and the milk bath Give a taste like.

  The fine bubble generating bathtub 49 includes a control unit 51 that operates and stops the pump 21, and the control unit 51 is electrically connected to the pump 21. The control unit 51 switches the operation and stop of the pump 21 by, for example, ON / OFF switch input and the like, and realizes the operation and stop of the fine bubble generation bathtub 49.

  As shown in FIGS. 3-7, the dissolution tank 2 provided in the gas dissolution unit 32 is provided with two partition walls, that is, a first partition wall 3 and a second partition wall 4 inside, and a liquid described later. The gas-liquid mixing tank 6 is partitioned by the first partition wall 3 on the most upstream side of the flow 5. In addition, a large bubble outflow prevention tank 7 is formed on the downstream side of the gas-liquid mixing tank 6 by the second partition wall 4 together with the first partition wall 3, and the large bubble outflow prevention tank 7 is adjacent to the gas-liquid mixing tank 6. Are arranged. On the most downstream side with respect to the flow of the liquid 5, the gas-liquid separation tank 8 is partitioned by the second partition wall 4 and is disposed adjacent to the large bubble outflow prevention tank 7.

  As shown in FIG. 5, the first partition wall 3 extends downwardly from the upper wall portion 2 a to the bottom wall portion 2 b of the dissolution tank 2. The first partition wall 3 is formed in a substantially flat plate shape. On the other hand, the lower end 3 a of the first partition wall 3 does not reach the bottom wall portion 2 b, and a gap is formed between the bottom wall portion 2 b and the gas-liquid mixing tank 6 and the large bubble are formed using this gap as a flow path for the liquid 5. The outflow prevention tanks 7 communicate with each other.

  The second partition wall 4 extends vertically upward from the bottom wall portion 2b of the dissolution tank 2 toward the upper wall portion 2a. The 2nd partition wall 4 is formed in a cylinder shape, and the cross section has an oval shape. The upper end 4 a of the second partition wall 4 is located below the upper wall portion 2 a of the dissolution tank 2, and the large bubble outflow prevention tank 7 and the gas-liquid separation tank 8 communicate with each other at the upper part of the dissolution tank 2.

  The second partition wall 4 is provided with a longitudinal rib 9 extending in the longitudinal direction of the dissolution tank 2 on the facing surface 4 b facing the first partition wall 3 so as to protrude toward the first partition wall 3. The vertical ribs 9 are formed in small pieces having a substantially rectangular shape, and are arranged in two rows at the lower end portion of the facing surface 4b with a space therebetween. The vertical rib 9 can also be provided on the surface 3 b of the first partition wall 3 that faces the second partition wall 4.

  Further, the second partition wall 4 is provided with a projecting portion 10 projecting upward at the center of the portion facing the first partition wall 3. The protrusion 10 is formed in a small piece having a substantially rectangular shape. The upper end 10a of the protruding portion 10 does not reach the upper wall portion 2a of the dissolution tank 2 and is disposed below the upper wall portion 2a.

  Such a dissolution tank 2 is provided with a lateral rib 11 at the upper end of the gas-liquid separation tank 8. The lateral ribs 11 are arranged in parallel with respect to the flow of the liquid 5 in the gas-liquid separation tank 8. The direction substantially coincides with the width direction of the vertical rib 9 projecting into the large bubble outflow prevention tank 7, and extends in a direction substantially orthogonal to the projecting portion 10 provided on the second partition wall 4.

  In addition, the dissolution tank 2 is provided with an inflow pipe connecting portion 12 that opens downward on the bottom wall portion 2 b of the gas-liquid mixing tank 6. The other end of the inflow pipe having one end connected to the discharge side of the pump, which will be described later, is connected to the inflow pipe connecting portion 12. The gas-liquid separation tank 8 is provided with an outflow pipe connecting portion 13 that opens to the front side at the lower end. The outflow pipe connecting portion 13 is connected to one end portion of an outflow pipe that sends the liquid 5 in which the gas is dissolved generated in the dissolution tank 2 to a supply section such as a bathtub.

  Furthermore, the dissolution tank 2 is provided with a gas circulation path 14 that connects the upper end portion and the lower end portion of the dissolution tank 2 through the outside of the dissolution tank 2 and communicates with each other. As will be described later, the gas circulation path 14 is used for temporarily removing the gas stored in the dissolution tank 2 from the dissolution tank 2 and circulating it back into the dissolution tank 2 when the liquid 5 is generated.

  Furthermore, the dissolution tank 2 is provided with a gas release valve 15 in a portion corresponding to the upper end portion of the gas-liquid separation tank 8 in the upper wall portion 2a. The gas release valve 15 has a float that floats and sinks following the liquid level of the liquid 5 in the gas-liquid separation tank 8 when the liquid 5 is generated, and is movable in the vertical direction. When the float moves up and down with the change, the gas stored in the dissolution tank 2 is released and stopped. The portion of the upper wall 2a of the dissolution tank 2 where the gas release valve 15 is provided corresponds to the upper end of the gas-liquid separation tank 8, and as shown in FIG. 4, the large bubble outflow prevention tank 7 and the gas-liquid separation tank 8 is an inclined surface portion 2c that is inclined obliquely downward from the boundary portion 16 to the edge portion of the upper wall portion 2a of the dissolution tank 2 facing the boundary portion 16.

  The dissolution tank 2 as described above is also divided slightly below the center in the height direction, with the upper unit 17 being the upper side and the lower unit 18 being the lower side. The first partition wall 3 is integrally incorporated in the upper unit 17, and the second partition wall 4 is integrally incorporated in the lower unit 18 including the vertical ribs 9 and the protrusions 10 provided here. Moreover, the flange parts 19 and 20 which protrude and protrude outward as above-mentioned are provided in the lower end edge part of the upper unit 17, and the upper end edge part of the lower unit 18. As shown in FIG. The melting tank 2 is configured to fasten the upper unit 17 and the lower unit 18 with bolts at predetermined portions of the overlapping flange portions 19 and 20 by using bolts and, if necessary, nuts, by overlapping the flange portions 19 and 20 with each other. Assemble and unite.

  In the gas dissolving section 32, a gas (such as air) that becomes a solute in the liquid 5 in which the gas is dissolved is stored in the dissolution tank 2 before operation. When the pump 21 is operated and the operation is started, a fluid that becomes a solvent in the liquid 5 (hot water 48 in the bathtub 47 in the fine bubble generation bathtub 49 shown in FIG. 2) is sucked from the suction port 26. The sucked fluid is supplied from the lower part to the gas-liquid mixing tank 6 of the dissolution tank 2 through the suction pipe 25 and the inflow pipe 22 and is ejected to the gas-liquid mixing tank 6. This ejection of fluid is caused by being pressurized to a predetermined pressure by the pump 21. In addition, prior to introducing the fluid into the gas-liquid mixing tank 6, the fluid can be mixed with the same type of gas as the gas stored in the dissolution tank 2 to form a gas-liquid mixed fluid. A gas-liquid mixed fluid is ejected into the liquid mixing tank 6. Hereinafter, the fluid alone and the gas-liquid mixed fluid are collectively referred to as “fluid”.

  The fluid jets and flows into the gas-liquid mixing tank 6 shown in FIGS. 3-7 toward the inner surface of the upper wall portion 2a of the dissolution tank 2. At this time, the fluid collides with the upper wall portion 2 a and the first partition wall 3 of the dissolution tank 2, rebounds, and gradually accumulates at the bottom of the gas-liquid mixing tank 6. In addition, the fluid that collides with the inner surface of the upper wall portion 2a and rebounds collides with the liquid surface of the fluid stored in the gas-liquid mixing tank 6 to stir the fluid.

  The gas and fluid stored in the dissolution tank 2 are mixed by stirring at this time, and when the gas-liquid mixed fluid is ejected, the gas and fluid are mixed together with the gas in the gas-liquid mixed fluid. The dissolution of the gas is promoted, and the liquid 5 in which the gas is dissolved is generated. This is because the gas mixed as bubbles in the fluid is subdivided by shearing by agitation, and the surface area in contact with the fluid increases, and the dissolved concentration of the gas near the liquid surface is reduced by homogenization by agitation. This is due to an increase in the dissolution rate of the liquid into the fluid.

  The liquid 5 in which the gas is dissolved in this way flows into the large bubble outflow prevention tank 7 using the gap between the lower end 3a of the first partition wall 3 and the bottom wall portion 2b of the dissolution tank 2 as a flow path, and gradually increases. It accumulates in the bubble outflow prevention tank 7. Since the liquid 5 flows into the large bubble outflow prevention tank 7 at the bottom of the dissolution tank 2, mixing of large bubbles into the liquid 5 is suppressed.

  When the liquid level of the liquid 5 exceeds the upper end 4 a of the second partition wall 4 in the large bubble outflow prevention tank 7, the liquid 5 flows into the gas-liquid separation tank 8. Thus, in the gas-liquid separation tank 8, before the liquid 5 flows out from the dissolution tank 2 to the outside by the second partition wall 4, the flow of the liquid 5 is lifted to the vicinity of the liquid surface, which is the gas-liquid interface. Large bubbles rise by buoyancy and burst at the liquid level. As a result, gas-liquid separation is promoted. Moreover, since the flow of the liquid 5 is a flow that passes over the upper end 4a of the second partition wall 4, it is a flow that passes through the liquid surface, and gas-liquid separation is also promoted when the liquid 5 passes over the second partition wall 4. .

  In addition, since the gas-liquid separation tank 8 is provided with the outflow pipe connecting portion 13 on the bottom wall portion 2b of the dissolution tank 2, even if bubbles due to undissolved gas are mixed in the liquid 5, Outflow of large bubbles existing near the surface can be suppressed. Bubbles are present densely toward the upper side of the liquid 5 to be stored, and large bubbles near the liquid surface do not exist so much near the bottom wall 2b. Since the liquid 5 flows out from the bottom of the dissolution tank 2 to the outside of the dissolution tank 2 through the outflow pipe connecting portion 13 and is taken out, the outflow of large bubbles is suppressed.

  The liquid 5 flowing out of the dissolution tank 2 through the outflow pipe connecting portion 13 is sent out from the discharge port 27 to the bathtub 47 through the outflow pipe 24 shown in FIGS.

  Further, in the gas dissolving part 32, a pressure difference is generated in the vicinity of both ends of the one end part 14 a and the other end part 14 b of the gas circulation path 14 in the dissolving tank 2 during operation. The pressure in the vicinity of one end portion 14 a facing the upper end portion of the dissolution tank 2 is higher than the pressure in the vicinity of the other end portion 14 b facing the lower end portion of the dissolution tank 2. In accordance with this pressure difference, the gas circulation ejector 23 sucks the undissolved gas stored in the upper part of the dissolution tank 2 and flows through the gas circulation path 14 from the one end portion 14a to the other end portion 14b. , And sent out to the gas-liquid mixing tank 6 of the dissolution tank 2.

  Thus, in the gas dissolving part 32, the gas stored in the dissolution tank 2 can be dissolved in the fluid while circulating. The gas introduced into the fluid through the gas circulation path 14 is taken into the fluid as bubbles, the contact area with the fluid is large, and the gas dissolution efficiency is increased. Further, since the undissolved gas is taken out from the upper end of the dissolution tank 2 to the gas circulation path 14, the gas can be circulated until there is no undissolved gas, and a long-time circulation operation is possible. Moreover, since the volume flow rate of the fluid is increased and the flow rate is increased by dissolving the undissolved gas in the fluid, the gas-liquid stirring is further improved, and the improvement of the gas dissolution efficiency is promoted. This is effective for eliminating large bubbles. Further, since the other end portion 14b of the gas circulation path 14 faces the lower end portion of the dissolution tank 2, the contact distance between the fluid and the gas in the dissolution tank 2 can be secured to some extent, and the gas-liquid contact time is sufficient. It is ensured, and the improvement of the gas dissolution efficiency is further promoted. Since the gas dissolution efficiency is increased in this way, it is not necessary to lengthen the contact time between the gas and the fluid so much, the fluid path can be shortened, and the gas dissolving portion 32 is downsized.

  In the gas dissolving device 1, as described above, the dissolving tank 2 fixed to the dissolving tank fixing portion 38 of the fixing device 33 and the pump 21 fixed to the pump fixing portion 39 are arranged vertically in a vertical line. The entire gas dissolving apparatus 1 including the gas dissolving part 32 can be stored in a compact manner, and the space saving of the gas dissolving apparatus 1 is further promoted. Moreover, since the gas dissolving part 32 is reduced in size, space saving is further promoted. In addition, in the gas dissolving device 1, the dissolving tank 2 is fixed to the dissolving tank fixing portion 38 of the fixing device 33, so that the installation is stable. Even if the gas-liquid mixed fluid exists in the dissolution tank 2 and the weight of the dissolution tank 2 increases, the dissolution tank 2 is stably supported by the fixing device 33.

  Further, in the gas dissolving device 1, the dissolving tank 2 has a flange portion 20 protruding outward at the outer peripheral portion thereof on a fixed surface portion 40 included in a dissolving tank fixing portion 38 disposed at the upper end portion of the fixing device 33. Since it is placed and fixed, the setting of the dissolution tank 2 is surely stable. The weight of the dissolution tank 2 can be firmly received by the fixed surface portion 40 through the flange portion 20, and the dissolution tank 2 is stably supported.

  When such a gas dissolving device 1 is incorporated in the fine bubble generating bathtub 49 shown in FIG. 2, it is housed in the exterior case 52 and installed in the bathroom 53, for example, as shown in FIG. Can do. As described above, since the gas dissolving device 1 is compactly accommodated as described above, the size of the outer case 52 can be reduced as much as possible even when the gas dissolving device 1 is internally provided in the outer case 52 as described above. Yes, and layout restrictions are almost eliminated. The control unit 51 shown in FIG. 2 can be arranged, for example, at the upper end inside the outer case 52, and the control unit 51 is also stored in a compact manner. The outer case 52 is also used as a mounting space for the control unit 51. Is possible. In addition, installing the gas dissolving device 1 in the outer case 52 is effective in suppressing noise caused by the operation of the pump 21.

  On the other hand, the oxygen discharged from the gas release valve 15 has a lower oxygen concentration as the gas dissolving apparatus 1 is operated because oxygen is more easily dissolved in the liquid 5 than nitrogen. When the gas dissolving device 1 is installed in the outer case 52, air in the inner space of the outer case 52 is circulated, so that low oxygen concentration air circulates. As a result, the hot water 48 in the bathtub 47 is circulated. It is expected that the oxygen concentration in the existing fine bubbles and the dissolved oxygen concentration in the hot water 48 will decrease.

  Therefore, when the gas dissolving apparatus 1 is installed in the exterior case 52, as shown in FIG. 10, the gas supply port 29 for taking in air is provided in the wall surface 54 that forms the outer case of the exterior case 52, The gas supply port 29 is exposed to communicate with the outside air. By doing in this way, since the gas supply port 29 communicates with the outside air, air having a substantially constant oxygen concentration can always be supplied into the dissolution tank 2 and exists in the hot water 48 in the bathtub 47. The oxygen concentration in the fine bubbles and the dissolved oxygen concentration in the hot water 48 are stabilized. The effect of bathing is stably maintained.

  In addition, the gas dissolving apparatus of this invention is not limited to the above embodiment. About the structure and structure of the dissolution tank with which a gas melt | dissolution part is provided, various aspects are possible, as long as it can arrange | position in parallel with a pump with a fixing device and can be reduced in size. Also, the type of gas or fluid is not particularly limited. An appropriate gas or fluid can be adopted depending on the use of the gas dissolving apparatus.

DESCRIPTION OF SYMBOLS 1 Gas dissolution apparatus 2 Dissolution tank 5 Liquid 20 Flange part 21 Pump 29 Gas supply port 32 Gas dissolution part 33 Fixing device 38 Dissolution tank fixing part 39 Pump fixing part 40 Fixed surface part 52 Exterior case 54 Wall surface

Claims (3)

In a gas dissolving apparatus comprising a gas dissolving part that mixes a fluid flowing in a dissolving tank with a gas and generates a liquid in which the gas is dissolved, and a pump that supplies the fluid to the gas dissolving part.
There is provided a fixing device having a dissolving tank fixing part for fixing a dissolving tank provided in the gas dissolving part and a pump fixing part for fixing a pump, and the pump fixing part is arranged below the dissolving tank fixing part,
The dissolution tank is fixed to the dissolution tank fixing portion of the fixing device, and the pump is fixed to the pump fixing portion, so that the dissolution tank and the pump are vertically arranged in a row. Gas dissolving device.   A dissolution tank fixing portion is disposed at the upper end of the fixing device, the dissolution tank fixing portion has a fixing surface portion, and the dissolution tank has a flange portion protruding outward, on the outer peripheral portion, and this flange portion is the fixing surface portion. The gas dissolving apparatus according to claim 1, wherein the gas dissolving apparatus is mounted on the dissolution tank and fixed to the dissolution tank fixing part.   The gas supply port for taking in the gas sucked into the dissolution tank by the operation of the pump is provided on the wall surface of the exterior case in which the gas dissolution apparatus is installed, and the gas supply port communicates with the outside air. Item 3. The gas dissolving device according to Item 1 or 2.

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