JP5939379B2 - Water discharge device - Google Patents

Description

  The present invention relates to a water discharge device.

  A water discharge device for cleaning a human body is required to enhance the feeling of cleaning. The feeling of washing is a feeling that depends on the feeling of stimulation and the feeling of volume when the water discharged from the water discharging device hits the human body. Applying the feeling of stimulation and volume to the properties of the discharged water, the feeling of stimulation is a physical quantity typified by the flow rate of water, and volume is the area of water that hits the human body (the cross-sectional area of water just before hitting the human body). Is a physical quantity represented by In other words, the sense of irritation is the intensity of water irritation felt by the user according to the flow rate of water. The irritation feeling increases as the flow rate of water increases, and the irritation feeling increases as the flow rate of water decreases. It becomes weak. The amount of water is the amount of water that the user feels depending on the area of water that hits the human body. The larger the water area, the stronger the volume, and the smaller the water area, the weaker the volume. Is.

  On the other hand, the water discharger is also required to further improve water saving performance. To improve water-saving performance, it is necessary to reduce the amount of water discharged from the water discharge device, but simply reducing the amount of water discharged will reduce the sense of volume, which is unsatisfactory. There is a possibility that the number of users to be held increases.

  Therefore, a technique has been proposed in which continuous linear water discharge is converted into water discharge by intermittent water masses, thereby ensuring an area of water that hits the human body while maintaining a low water volume, and not impairing the sense of volume. As an example of this technique, the thing of the following patent document 1 is proposed. In the technique described in Patent Document 1 below, the first portion having a high injection speed and the second portion having a low injection speed are alternately formed in the water discharge, and the first portion catches up with the second portion before landing on the human body. , Forming a large water mass. In the technique described in Patent Document 1 below, in order to form such a speed difference, it is used to intermittently apply a pressure higher than the water supply pressure to the water discharge device to greatly change the water discharge pressure. . By changing the water discharge pressure greatly in this way, intermittent flow velocity fluctuations occur in the water discharge, so that the water discharge by the intermittent water mass as described above is realized.

  Although the technique described in Patent Document 1 below is an excellent technique for reliably realizing water discharge by intermittent water masses, a relatively large pump is required to apply a pressure higher than the water supply pressure. Become. If such a relatively large pump is indispensable, the entire water discharge device becomes expensive, which may lead to an increase in the size of the device.

  As a technique for periodically changing the flow rate of discharged water without using a pump, a technique described in Patent Document 2 below has been proposed. In Patent Document 2 below, fluctuations in the flow rate of the discharged water are caused by mixing bubbles in the discharged water. According to the description in this document, in a portion where the amount of air mixed as bubbles in the cleaning water is larger, the speed of the cleaning water in that portion becomes higher. On the other hand, in a portion where the amount of air mixed as bubbles in the wash water is smaller, the speed of the wash water in that portion becomes lower. Thereby, repetition of a high-speed part and a low-speed part arises in water discharge.

JP 2001-90151 A Japanese Patent No. 4572999

  The technical idea of the above-mentioned Patent Document 2 is to change the flow velocity to the discharged water by changing the amount of air mixed into the wash water. However, as a result of studies by the present inventors, it has been found that it is difficult for the technical idea of Patent Document 2 to give a large flow rate fluctuation to the water discharge. Paragraph 0047 of Patent Document 2 describes that it is desirable to supply fine bubbles to the cleaning water in order to efficiently mix air into the cleaning water. However, the present inventors have found that even if such fine bubbles are mixed into the washing water and the mixing amount is changed, it is difficult to give a large flow rate fluctuation to the water discharge. Thus, when the flow rate fluctuation of the water discharge is small, it takes a long time for the water discharge portion having a relatively high speed to catch up with the water discharge portion having a relatively low speed, and there is sufficient water mass to land on the target human body. May not grow.

  The present inventors have dealt with such problems and can give a sufficiently large flow velocity fluctuation to the water discharge without using a large pump, and even if the distance from the water discharge to the water landing is short, it is sufficiently large. Investigation was repeated for the purpose of providing a water discharging device capable of forming a water mass. As a result, the present inventors do not mix fine bubbles into the washing water, but supply large bubbles intermittently to the jet, and the first water flow state in which the jet passes through the large bubbles, It has been found that it is preferable to vary the water flow resistance of the jet by alternately and repeatedly generating a second water flow state through which the jet flows.

  More specifically, a water supply channel that supplies water, an injection port that injects water supplied from the water supply channel as a jet toward the downstream side, and a downstream side of the injection port that discharges the jet to the outside. A water flow path portion that is provided between the discharge port and the jet port and the discharge port and through which the jet flow from the jet port to the discharge port passes is formed adjacent to the water flow path portion and the water flow path portion. This is realized by a water discharge device including a water reservoir chamber having a water reservoir and a bubble supply means for supplying bubbles in which air is bubbled into the water flow path. The bubble supply means of this water discharger has an air introduction port for introducing air into the water reservoir, and the air introduced from the air introduction port into the water reservoir is kept in communication with the air introduction port with time. When the bubbles reach a predetermined size, the bubbles are separated from the air inlet and intermittently supplied as large bubbles to the water passage.

  The inventors of the present invention have made further studies on such a water discharge device, and there are new problems to be solved when alternately forming the first water flow state and the second water flow state described above. I found it. In order for the air introduced from the air inlet into the water reservoir to grow greatly with the passage of time while maintaining the state of communication with the air inlet, it is necessary that the water reservoir is filled with water. In the water discharging device conceived by the present inventor, since the water injected from the injection port is supplied to the water reservoir, there are the following new problems to be solved due to the injected water.

  Since the primary purpose of the water jetted from the jet port is to be discharged from the jet port to the outside and vigorously head toward the object to be cleaned, the flow rate is required to be high to some extent. When a jet flow having a high flow velocity is supplied into the water reservoir chamber, a swirl flow is formed in the water reservoir, and the flow velocity of the swirl flow is increased according to the flow velocity of water ejected from the injection port. Therefore, in view of the necessity of maintaining the flow velocity of water injected from the injection port to be high to some extent, the generation of a swirling flow having a high flow velocity is unavoidable.

  When a swirling flow having a high flow velocity is generated in this manner, the air introduced into the water reservoir portion is easily separated from the air inlet, so that large bubbles cannot be generated in the water reservoir chamber, and there is a risk that a sufficient speed difference cannot be made for water discharge. Will increase. Therefore, the present inventors have studied to prevent the generation of large bubbles by decelerating the swirling flow until it reaches the vicinity of the air inlet. In order to decelerate the swirling flow, it is necessary to provide a resistance means that provides resistance to the progress of the swirling flow. In particular, when the water reservoir chamber is to be miniaturized, it is necessary to rapidly decelerate the swirling flow, so that the resistance of the resistance means is required to be large. If such a large resistance is provided in the reservoir, the flow velocity of the swirling flow can be suppressed, but the swirling flow is temporarily disturbed when it passes through the resistance means. If such a turbulent flow turbulence occurs near the air inlet, turbulence occurs at the gas-liquid interface, and it is assumed that the bubbles are separated from the air inlet before the bubbles sufficiently grow.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a water discharge device capable of giving a sufficiently large flow velocity fluctuation to water discharge without using a large pump. An object of the present invention is to provide a water discharger capable of supplying stable large bubbles by suppressing the disturbance of the swirling flow in the room and causing a fluctuation in the flow rate of stable water discharge.

  In order to solve the above problems, a water discharge device according to the present invention is a water discharge device that discharges water toward a human body, and a water supply channel that supplies water, and water that is supplied from the water supply channel is directed downstream. An injection port that injects as a jet flow, a discharge port that is provided on the downstream side of the injection port, discharges the jet flow to the outside, and is provided between the injection port and the discharge port. A water passage chamber that is a passage, a water reservoir chamber having a water reservoir portion that is formed adjacent to the water passage passage portion, and a water supply portion that supplies air bubbles in the water passage passage portion. . The bubble supply means has an air introduction port for introducing air into the water reservoir, and the air introduced into the water reservoir from the air introduction port grows in a bubble shape over time while maintaining a state communicating with the air introduction port. When the bubbles reach a predetermined size, the bubbles are cut off from the air inlet and intermittently supplied as large bubbles to the water flow path section. The second water flow state in which the jet flows through the accumulated water is alternately and repeatedly generated to vary the water flow resistance of the jet in the water flow path portion. Furthermore, the bubble supply means has a speed reducing portion that decelerates the swirling flow formed in the water reservoir, and the speed reducing portion is separated before the air introduced from the air introduction port into the water reservoir becomes a large bubble by the swirling flow. In order to suppress this, the flow velocity of the swirling flow is rapidly decelerated. The air introduction port is disposed closer to the ejection port in the traveling direction of the jet flow, while the speed reducing portion is disposed closer to the ejection port in the traveling direction of the jet flow.

  According to the present invention, the air introduced from the air inlet into the water reservoir is grown in a bubble shape over time while maintaining the state of communication with the air inlet, so that the air introduced from the air inlet is formed. Bubbles can be grown as large bubbles. Furthermore, when the air introduced from the air inlet becomes large bubbles and is supplied to the water passage, it is rapidly drawn by the high-speed jet, and the bubbles are separated from the air inlet, so that the large bubbles are intermittent Can be supplied to the water passage section. By doing in this way, the period when a large bubble is not supplied to a jet, and the period when a large bubble is supplied to a jet can be generated repeatedly alternately. During the period in which the large bubbles are supplied to the jet, the jet flow speed in the water flow path portion is small, so that the jet velocity is discharged in a relatively fast state. On the other hand, in the period when the large bubbles are not supplied to the jet, the jet flow is discharged in a relatively slow state because the flow resistance of the jet in the water passage section is small. Therefore, by alternately and repeatedly generating the first water flow state and the second water flow state, it is possible to greatly change the speed of the jet to be discharged and to give a large flow velocity fluctuation to the water discharge. Even when the distance is short, a sufficiently large water mass can be formed.

  In the water discharger according to the present invention, a swirling flow is formed in the water reservoir, and the swirling direction of the swirling flow is affected by the jet flow. Since the jet flow is jetted from the jet port and heads toward the discharge port, the swirling direction of the swirling flow is also along this, and swirls adjacent to the jet flow. Since the swirling flow is accelerated by the jet flow from the injection port to the discharge port, the flow velocity becomes the highest near the discharge port where the acceleration has been completed, and the flow velocity becomes the highest near the injection port that turns in the water reservoir and starts acceleration. Lower.

  In the present invention, the arrangement of the air inlets is devised in order to utilize the characteristics of the velocity distribution of the swirling flow. Since the air introduction port is arranged on the injection port side in the traveling direction of the jet flow, air can be introduced into a region where the flow velocity of the swirl flow is the lowest and grow into a large bubble.

  Furthermore, in the present invention, in order to ensure that the bubbles that grow in communication with the air inlet are large bubbles, the flow velocity of the swirling flow is rapidly reduced so that the bubbles in the middle of the growth are not separated from the air inlet. A deceleration unit is provided. When the swirling flow is decelerated in the deceleration portion, the flow is disturbed. In the present invention, however, the influence of the disturbance is reduced by devising the arrangement position of the deceleration portion. In the present invention, the distance between the speed reduction part and the air inlet is ensured by disposing the speed reduction part from the discharge port in the traveling direction of the jet flow. By disposing the speed reducer part away from the air inlet to some extent in this way, the disturbance of the swirl flow in which the flow is disturbed in the speed reducer part is attenuated, and in the region where the bubble grows, the flow of the swirl flow converges. It is. Therefore, it is possible to maintain a communication state between the air inlet and the growing bubble and promote stable bubble growth.

  Moreover, in the water discharging apparatus according to the present invention, the water reservoir chamber includes a first wall surface that forms an inner wall surface on which the water reservoir chamber side opening connected to the discharge port is formed on one side, and an inner wall surface on which the injection port is formed on one side. A second wall surface that is configured, and a third wall surface that connects the other side of the first wall surface and the other side of the second wall surface, and the speed reduction portion is configured so that the first wall surface and the third wall surface are smooth. It is also preferable that it is configured to be joined so as to constitute a bent surface that is not connected.

  In this preferable aspect, the swirl flow that has reached the vicinity of the discharge port along the jet flows from the first wall surface along the third wall surface, and further flows from the third wall surface along the second wall surface. The first wall surface and the third wall surface are not smoothly connected but form a bent surface. Therefore, the direction of travel of the swirling flow that flows along the first wall surface is suddenly changed by the third wall surface, and flows along the third wall surface. In this preferred embodiment, the speed reducing portion is configured by utilizing the direction change of the swirling flow. As a mode of decelerating the swirling flow, for example, a configuration in which a plurality of small ribs are set up to inhibit the flow can be considered. However, in the case of standing up a plurality of small ribs in this way, the swirling flow is divided into a plurality of flows, and although the flow velocity can be reduced, if trying to converge the turbulence until it reaches the air inlet, It is necessary to lengthen the distance from the deceleration unit to the air inlet. On the other hand, in this preferable aspect, since it decelerates by changing the advancing direction of the whole swirl | vortex flow, it can suppress that a shunt flow generate | occur | produces and it becomes easy to converge the disturbance of a flow.

  In the water discharge device according to the present invention, it is also preferable that the speed reduction portion has a side water inlet for introducing a side water flow having a slower flow velocity than the jet into the water reservoir, and the side water inlet is provided in the vicinity of the bent surface. .

  In this preferred embodiment, since the auxiliary water flow inlet is provided in the vicinity of the bent surface, the auxiliary water flow having a low flow velocity can be introduced in the vicinity of the bent surface, and the slow stagnation of the flow different from the swirling flow is provided in the vicinity of the bent surface. Water can be placed. After the swirling flow flows along the first wall surface, the swirling flow enters and collides with the stagnation water and is decelerated, and then collides with the bent surface and decelerates. Thus, the turbulence which generate | occur | produces in a turning flow can be reduced by decelerating a turning flow in steps. Furthermore, by providing the auxiliary water flow inlet and introducing the auxiliary water flow, the flow velocity of the swirling flow can be controlled at a lower speed than when the water reservoir chamber is filled with water only by the water introduced from the injection port. Since it becomes easy, the air introduce | transduced in the water reservoir from the air inlet can be maintained in the state connected with the air inlet, and a large bubble can be produced | generated more stably.

  Moreover, in the water discharging apparatus which concerns on this invention, it is also preferable that the vicinity of the deceleration part and the vicinity of an air inlet are connected by the smooth continuous surface.

  In this preferred embodiment, the vicinity of the speed reduction portion and the vicinity of the air introduction port are connected by a smooth continuous surface so as not to cause a new turbulence in the swirling flow from the speed reduction portion to the air introduction port. Even if it is a turbulent swirling flow, a new turbulence does not occur thereafter, and the turbulence of the swirling flow in the vicinity of the air inlet can be more reliably reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the water discharging apparatus which brings about supply of the stable large bubble and the fluctuation | variation of the flow rate of the stable water discharge can be provided by suppressing disturbance of a swirl flow.

It is a schematic perspective view which shows the water discharging apparatus which concerns on embodiment of this invention. It is a figure which shows the fluctuation | variation of the water discharge initial speed in the water discharging apparatus shown in FIG. It is a figure which shows typically the water discharging state of the water discharging apparatus shown in FIG. It is a figure which shows typically schematic structure of the water storage chamber which the water discharging apparatus shown in FIG. 1 has. It is a figure which shows the AA cross section of FIG. It is a figure which shows the BB cross section of FIG. It is a figure for demonstrating the aspect which supplies a bubble to a jet flow in the water reservoir chamber shown in FIG. It is a figure which shows CC cross section of FIG. It is a figure which expands and shows the D area | region of FIG. It is a figure which shows typically schematic structure of the water reservoir which the water discharging apparatus as a modification has. It is a figure which shows typically schematic structure of the water reservoir which the water discharging apparatus as a modification has. It is a figure which shows typically schematic structure of the water reservoir which the water discharging apparatus as a modification has. It is a figure which shows typically schematic structure of the water reservoir which the water discharging apparatus as a modification has. It is a figure for demonstrating the aspect which supplies a bubble to a jet flow in the water reservoir chamber shown in FIG. It is a figure for demonstrating the aspect which supplies a bubble to a jet flow in the water reservoir chamber shown in FIG. It is a figure which expands and shows F area | region of FIG. It is a figure which shows the EE cross section of FIG. It is a figure for demonstrating the aspect which supplies a bubble to a jet flow in the water reservoir chamber shown in FIG. It is a figure for demonstrating the aspect which supplies a bubble to a jet flow in the water reservoir chamber shown in FIG. It is a figure which shows the GG cross section of FIG. It is a figure which shows the photograph which copied the state which actually supplies a bubble to a jet flow in the water reservoir chamber shown in FIG. It is a figure which shows the modification which forms a subwater flow in a water reservoir. It is a figure for demonstrating the transition of the flow method of a substream in the modification shown in FIG. It is a figure which shows the modification which forms a subwater flow in a water reservoir. It is a figure which shows the example which provided the large bubble discharge | emission suppression means in the water reservoir. It is a figure which shows the example which provided the large bubble discharge | emission suppression means in the water reservoir. It is a figure which shows the modification of a water reservoir.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  The water discharging apparatus which is embodiment of this invention is demonstrated. The water discharge device according to the present invention discharges water toward the human body and can give a sufficiently large flow rate fluctuation to the water discharge without using a large pump, and the distance from the water discharge to the water landing is short. Even in such a case, a sufficiently large water mass can be formed. Therefore, the application range of the water discharge device according to the present invention is wide-ranging, and it is possible to land the water discharge in the form of a water mass on the human body, which can achieve both a water-saving effect and an improved feeling of cleaning. It can be applied to things. In the description of the present embodiment, an example in which the water discharge device of the present invention is applied as a device that performs local cleaning of a human body will be described. In view of the gist of the present invention, the water discharge device according to the present invention is not limited to this.

  As shown in FIG. 1, a local cleaning device WA as a water discharge device according to an embodiment of the present invention is used on a toilet CB. The local cleaning device WA includes a main body WAa, a toilet seat WAb, a toilet lid WAc, and a remote controller WAd. The main body WAa has a nozzle NZ, and holds the nozzle NZ so as to freely advance and retract. The main body WAa rotatably holds the toilet seat WAb and the toilet lid WAc.

  At the time of use, the user rotates the toilet lid WAc upward as shown in FIG. 1 to expose the toilet seat WAb. After the user sits on the toilet seat WAb and uses the stool, the user operates the remote controller WAd to discharge water from the discharge port NZa formed in the nozzle NZ, and cleans the local area of the user. After the local cleaning, the user operates the remote controller WAd to stop water discharge from the discharge port NZa. Thereafter, the user operates the remote controller WAd to flow the washing water into the toilet CB.

  In this embodiment, as shown in FIG. 1, a J axis along the traveling direction of the water discharge JW and a V axis along the vertical direction are set, and the local cleaning device WA is used while using the J axis and the V axis. The water discharge mode will be described.

  An example of the fluctuation mode of the water discharge initial speed in this embodiment is shown in FIG.

  As shown in FIG. 2, by periodically varying the initial water discharge speed, the water discharge precedes the subsequent water discharge until the initial water discharge speed is low (FW in FIG. 2) to high (AW in FIG. 2). It forms a catch-up period to catch up with. The catch-up period that occurs periodically is a period during which water is discharged without contributing to the formation of a water mass, and is therefore referred to as a waste water period for convenience in this embodiment.

  FIG. 3 schematically shows the water discharge state of the local cleaning device WA shown in FIG. In this embodiment, without using a large pump, it is comprised so that the flow rate of the water discharged may be changed periodically and a large water mass may collide with the water discharge target site.

  When the flow rate of the discharged water changes as described above, the discharged water JW includes the part Wp1, the part Wp2, the part Wp3, the part Wp4, and the part Wp5 as shown in FIG. Assuming that the flow velocities of these parts are V1, V2, V3, V4, and V5, V1 (≈V5) <V2 (≈V4) <V3.

  Therefore, since the speed of the part Wp3 is greater than the part Wp2 as it moves from (A) to (C) in FIG. 3 immediately after water discharge, the part Wp3 merges with the part Wp2 and further merges with the part Wp1 to generate a large amount of water. It becomes a lump.

  Thus, the part Wp3 having the maximum flow velocity is sequentially combined with the part Wp2 and the part Wp1 in front of the part, thereby forming a large lump and landing on the human body part. When this washing water hits a human body part, it is in a water mass state with a large collision energy (washing strength). Since the flow velocity V3 of this part Wp3 is the maximum flow velocity, the wash water discharged by the pulsating flow is discharged from the discharge port NZa in a form of water discharge such that the combined water mass appears every pulsation cycle. Will be. In addition, since such a phenomenon occurs in the pulsation cycle, the water mass that has passed through the coalescence of the maximum flow velocity portion Wp3 as described above repeatedly appears, and the water mass at a certain water discharge timing and the portion Wp3 at the next water discharge timing. Water is discharged at almost the same speed as the water mass that has undergone coalescence. In addition, each of these water masses is in a state of being connected by the parts Wp4 and Wp5 discharged after the part Wp3 at the maximum flow velocity.

  The local cleaning device WA according to the present embodiment changes the flow rate of discharged water without using a large pump, and discharges water using the water mass that appears repeatedly as described above. The local cleaning device WA has a water reservoir chamber 10 on the upstream side of the discharge port NZa of the nozzle NZ shown in FIG. The local cleaning device WA according to the present embodiment changes the flow rate of discharged water by supplying air bubbles through the water reservoir 10. The configuration of the water reservoir 10 will be described with reference to FIG. FIG. 4 is a diagram schematically illustrating a schematic configuration of the water storage chamber 10.

  As shown in FIG. 4, the water storage chamber 10 includes an air pipe 101, a first water supply pipe 102 (water supply path), a discharge pipe 103, and a second water supply pipe 104. The air pipe 101, the first water supply pipe 102, the discharge pipe 103, and the second water supply pipe 104 are pipes provided so as to communicate with the inside of the water reservoir chamber 10.

  The water reservoir 10 has a substantially rectangular parallelepiped box shape as a whole. The water reservoir 10 has a wall 10e, a wall 10f, a wall 10g, a wall 10h, a wall 10i, and a wall 10j. In FIG. 4, only the wall 10e, the wall 10f, the wall 10g, and the wall 10h are drawn so as to form a rectangle. The wall 10i and the wall 10j are walls disposed at positions facing each other, and are disposed so as to connect the wall 10e, the wall 10f, the wall 10g, and the wall 10h.

  The air duct 101 communicates with the interior of the water reservoir 10 via an air inlet 10 a formed in the water reservoir 10. The air inlet 101 is formed in the vicinity of the corner where the wall 10g and the wall 10h face each other, and at the upstream end of the wall 10g. The first water supply pipe line 102 communicates with the inside of the water reservoir chamber 10 through the injection port 10b. The injection port 10b is near the corner where the wall 10h and the wall 10e face each other, and is formed in the wall 10h. The discharge pipe line 103 communicates with the inside of the water reservoir chamber 10 through the water reservoir chamber side opening 10c. The water reservoir chamber side opening 10c is formed in the wall 10f in the vicinity of the corner where the wall 10f and the wall 10e are abutted. The second water supply conduit 104 communicates with the interior of the water reservoir 10 via the auxiliary water flow inlet 10d. The auxiliary water flow inlet 10d is formed in the wall 10f near the corner where the wall 10f and the wall 10g are abutted.

  The air pipe 101 is a pipe connecting the air inlet 10a and the opening opened to the atmosphere. Air introduced from the air duct 101 is drawn into the water reservoir 10 from the air inlet 10a. The air drawn into the water reservoir 10 forms bubbles BA.

  The 1st water supply pipe line 102 is a pipe line which connects the injection opening 10b and a water supply source. The first water supply pipeline 102 is reduced in diameter in the middle of the pipeline or at the injection port 10b. Therefore, the speed of the water supplied from the first water supply pipe line 102 is increased, and the water is injected into the water reservoir 10 as the jet WSm.

  The discharge pipe 103 is a pipe connecting the water reservoir chamber side opening 10c and the discharge port NZa formed in the nozzle NZ (see FIG. 1). In the case of this embodiment, the injection port 10b and the water reservoir chamber side opening 10c are arranged to face each other. Accordingly, the jet WSm injected from the injection port 10b into the water reservoir chamber 10 travels along the J axis in the water reservoir chamber 10 and enters the discharge conduit 103 from the water reservoir chamber side opening 10c. The water that has entered the discharge conduit 103 travels along the J axis along the discharge conduit 103 and is discharged from the discharge port NZa to the outside.

  The second water supply pipe 104 is a pipe that connects the auxiliary water flow inlet 10d and the water supply source. The second water supply conduit 104 communicates with the interior of the water reservoir 10 via the auxiliary water flow inlet 10d. At least a part of the water supplied from the second water supply conduit 104 forms a side water flow WSs that is a swirling flow in the water reservoir 10.

  As described above, the jet WSm injected from the injection port 10b into the water reservoir 10 travels along the J axis in the water reservoir 10 and enters the discharge pipe 103 from the water reservoir chamber side opening 10c. Therefore, the water flow path part 105 which is a path | route through which the jet flow WSm from the injection port 10b to the discharge port NZa passes is formed. In the case of this embodiment, the water flow path part 105 is a path | route which connects the injection port 10b and the water reservoir room side opening 10c.

  The remaining area of the water reservoir chamber 10 excluding the water flow path portion 105 is a water reservoir portion 106. The water reservoir 106 is a part for forming the water PW adjacent to the water flow path portion 105. In the case of this embodiment, the water reservoir 106 is formed so as to surround the water flow path portion 105.

  In the case of this embodiment, the injection port 10b and the water reservoir chamber-side opening 10c are disposed close to one side of the water reservoir chamber 10 that is rectangular. On the other hand, the air inlet 10a and the auxiliary water inlet 10d are disposed close to the other side of the rectangular water reservoir chamber 10. Therefore, the injection port 10b and the water reservoir chamber side opening 10c, the air introduction port 10a, and the auxiliary water flow introduction port 10d are spaced apart.

  4 is shown in FIG. 5, and the BB cross section in FIG. 4 is shown in FIG. In the state shown in FIG. 4, the jet WSm travels in the stored water PW, and is directed toward the water storage chamber side opening 10 c while receiving resistance from the stored water PW as shown in FIG. 5. The jet WSm that has reached the water reservoir chamber side opening 10c enters the discharge pipe 103, and proceeds in contact with the inner wall surface of the discharge pipe 103 as shown in FIG.

  In the state shown in FIG. 4, the bubble BA is small. When the time further advances from the state shown in FIG. 4, the bubble BA grows in an elongated shape as shown in FIG. The bubble BA grows until its lower end approaches the jet WSm. Therefore, the region in which the sub-water flow WSs can turn is narrower than the state shown in FIG. The sub-water flow WSs is swirling in a direction in which the swirl flow velocity is high and the flow of the jet WSm is not hindered. FIG. 8 shows a CC cross section of FIG. 7, and FIG. 9 shows a region D of FIG.

  As shown in FIG. 8, the elongated bubble BA is formed by three walls 10h, 10i, 10i, 10f of the four walls 10h, 10i, 10j, 10f extending from the air inlet 10a of the water reservoir chamber 10 toward the injection port 10b. Growing in contact with 10j. Therefore, the surface in contact with the secondary water flow WSs is only the surface facing the secondary water flow inlet 10d.

  As shown in FIG. 9, buoyancy acts on the bubble BA that has grown into an elongated shape in the V-axis direction, which is the vertical direction. The auxiliary water stream WSs acts on the bubble BA so as to resist this buoyancy. Accordingly, the bubble BA is kept in contact with the three walls 10h, 10i, 10j out of the four walls 10h, 10i, 10j, 10f extending from the air introduction port 10a of the water reservoir chamber 10 toward the injection port 10b. Can do.

  From the viewpoint of growth of the elongated bubble BA, the walls 10h, 10i, and 10j function as a guide surface that guides the bubble BA from the air introduction port 10a to the water flow path portion 105. The secondary water flow WSs generates a force that presses the bubbles BA toward the walls 10h, 10i, and 10j so that the bubbles BA do not separate from the walls 10h, 10i, and 10j, which are guide surfaces, and gives a pressing force that grows into an elongated shape. It functions as a means. In the present embodiment, the length of the guide surface from the air introduction port 10a side to the water flow path part 105 side is configured to be longer than the length of the water flow path part 105 from the injection port 10b to the discharge port 10c. It is also preferable.

  The auxiliary water flow WSs is a swirling flow and a centrifugal force is generated toward the wall 10h. Therefore, the auxiliary water flow WSs actively acts to press the bubbles BA against the wall 10h. However, if the bubble BA does not have an external effect, it will expand as it is to become a spherical shape. Therefore, even if it does not have an active pressing action, an aspect that functions as a pressing force application means is adopted. It is possible. A modification from such a viewpoint is shown in FIG.

  As shown in FIG. 10, a wall 10 k is provided in the water reservoir 10. The wall 10k is provided between the wall 10h and the wall 10f and substantially parallel to each wall. The wall 10k is disposed so as to be separated from the wall 10g and the wall 10e. The wall 10k is provided at a position separated from the water flow path portion 105 as well.

  By providing the wall 10k in this way, the bubble BA introduced from the air inlet 10a travels between the wall 10h and the wall 10k and grows toward the water flow path portion 105. Although the wall 10k does not actively press the bubble BA toward the wall 10h, it suppresses the expansion of the bubble BA, and as a result, generates a force for pressing the bubble BA toward the wall 10h. Functions as a means.

  The wall 10h functioning as a guide surface is a straight wall along a plane extending in a direction orthogonal to the walls 10g and 10e. However, in order to function as a guide surface, the vicinity of the air inlet 10a and the injection port A continuous surface that smoothly connects the vicinity of 10b is sufficient. A modification from this viewpoint will be described with reference to FIGS.

  The water reservoir chamber 10B shown in FIG. 11 has a wall 10e, a wall 10Bf, a wall 10Bg, and a wall 10Bh. The air inlet 10a is provided in the wall 10Bf. The air inlet 10a is provided at a position that opposes the vicinity of the approximate center of the wall 10e. Since the wall 10Bh connects the vicinity of the air inlet 10a and the vicinity of the injection port 10b, the wall 10Bh is provided with an inclination as shown in FIG. Even if the wall 10Bh is provided in an inclined manner as described above, it is inclined along the direction in which the air introduction port 10a opens (the direction toward the injection port 10b), and thus functions as a guide surface for growing the bubbles BA. Plays.

  The water reservoir chamber 10C shown in FIG. 12 includes a wall 10e, a wall 10Cf, a wall 10Cg, and a wall 10Ch. The wall 10Ch of the water reservoir 10C has a shape curved outward. Even the curved wall 10Ch in this way smoothly connects the vicinity of the air inlet 10a and the vicinity of the injection port 10b, and thus functions as a guide surface for growing the bubbles BA.

  A modification in which the arrangement position of the air inlet is changed will be described with reference to FIG. A water reservoir chamber 10D shown in FIG. 13 includes a wall 10e, a wall 10Df, a wall 10Dg, and a wall 10Dh. The air inlet 10Da is a corner where the wall 10Df and the wall 10Dg are abutted against each other, and is provided in the wall 10Df. As shown in FIG. 13, since the corner | angular part with which wall 10Dg and wall 10Dh are faced | matched is formed, the wall from air inlet 10Da to injection port 10b does not continue smoothly, but a discontinuous surface is formed. It is composed. In this case, although the function as the guide surface described above is not sufficiently achieved, an elongated bubble BA can be formed.

  When the time further advances from the state shown in FIG. 7, the elongated bubble BA approaches the jet WSm and begins to interfere as shown in FIG. The bubble BA is pulled by the jet WSm and enters the water flow path portion 105. Accordingly, the water that has entered the bubble BA is pushed away, and the swirling flow velocity of the sub-water flow WSs is increased. The sub-water flow WSs whose swirl velocity is increased will tear the bubbles BA.

  When time further advances from the state shown in FIG. 14, the bubble BA is completely drawn into the jet WSm as shown in FIG. 15, and the bubble BA exists over substantially the entire area of the water flow path portion 105. FIG. 16 shows a region F in FIG. 15, and FIG. 17 shows a cross section taken along line EE in FIG.

  As shown in FIG. 16A, since the bubble BA exists over substantially the entire area of the water flow path portion 105, it exists up to the vicinity of the injection port 10b. Therefore, the amount of water existing in the vicinity of the injection port 10b is reduced, and the generation of vortex in the vicinity of the injection port 10b is suppressed. When the bubble BA is formed at a position away from the injection port 10b, the state is as shown in FIG. In the state shown in FIG. 16B, there is a lot of water in the vicinity of the injection port 10b, and a lot of vortex flow is generated. Since the generation of the vortex becomes resistance to the progression of the jet WSm, by suppressing the vortex as shown in FIG. 16A, the jet WSm can be directed toward the discharge port NZa without reducing the velocity.

  As shown in FIG. 17, the jet WSm penetrates the bubble BA. As the jet WSm penetrates the bubble BA in this way, the resistance around the jet WSm decreases, and the jet WSm can go to the discharge port NZa without reducing the speed. However, the state in which the jet WSm completely penetrates the bubble BA as illustrated in FIG. 17 is not indispensable, and it is only necessary that many portions around the jet WSm can be surrounded by the bubble BA. It may be in a state in contact with the water PW.

  When time further advances from the state shown in FIG. 15, the bubble BA moves toward the discharge pipe 103 so as to be drawn into the jet WSm as shown in FIG. Since the bubbles BA are formed so as to have a flow passage cross-sectional area wider than the water flow passage portion 105, they are directed toward the discharge pipe 103 while being caught on the outer periphery of the water reservoir chamber side opening 10c. The bubbles BA caught on the outer periphery of the water reservoir chamber side opening 10c in this way enter the discharge pipe 103 while being pushed in from behind by the jet WSm or pushed in by receiving pressure from the water PW. become.

  When the time further advances from the state shown in FIG. 18, the bubble BA enters the discharge pipe 103 as shown in FIG. 19. FIG. 20 shows a GG cross section of FIG. As shown in FIG. 20, when the bubble BA enters the discharge pipe 103, a film of air is formed along the inner wall of the discharge pipe 103, and the jet WSm travels in the film. Accordingly, the resistance received by the jet WSm from the inner wall of the discharge pipe 103 is reduced, and the jet WSm is directed to the discharge port NZa without being decelerated. However, the state in which the bubble BA is completely wrapped by the bubble BAm as illustrated in FIG. 15 is not indispensable, and it is only necessary to surround many portions around the jet WSm with the bubble BA. The state may be in contact with the discharge pipe 103.

  When the bubble BA further proceeds to the downstream side of the discharge pipe 103 from the state shown in FIG. 19, the next bubble BA is taken in from the air pipe 101 and returns to the state of FIG. In the present embodiment, the movement of the bubble BA described with reference to FIGS. 4 to 20 is periodically repeated.

  Further, in the present embodiment, from the first time from the time when the previously generated large bubble BA reaches the water flow path portion 105 to the time when the entire large bubble BA reached is discharged from the water flow passage portion 105. Also, the second time from the time when the previously generated large bubble BA reaches the water flow path unit 105 to the time when the next generated large bubble BA reaches the water flow path unit 105 is configured to be longer. ing.

  As described above, since the second time is longer than the first time, the next generated large bubble is based on the point in time when the previously generated large bubble BA reaches the water passage section 105. When the BA reaches the water flow path unit 105, the previously generated large bubble BA can be discharged from the water flow path unit 105 without fail. Therefore, the 2nd water flow state with which the water flow path part 105 was satisfy | filled with water can be produced reliably.

In the present embodiment, the side water stream WSS, be those leading to large bubbles BA in water communicating path section 105, an air inlet 10a for introducing air into the water reservoir 10, an air inlet by the secondary water flow WSS Walls 10h, 10i, and 10j serving as resistance means serving as resistance to movement of the large bubble BA guided from 10a to the water flow path unit 105 are provided, and the bubble BA is passed through the air introduction port 10a. It functions as a guide surface that leads to the path portion 105.

  In order to ensure the above-mentioned second time for a long time, it is necessary to supply the air introduced from the air introduction port 10a to the water passage section 105 as slowly as possible. However, since the sub-water flow WSs is generated in the water reservoir 10 due to the influence of the jet flow WSm, the large bubbles BA are guided to the water flow path portion 105 by the sub-water flow WSs. Therefore, the large bubble BA may be guided to the water passage section 105 earlier than the intended timing, and a case where the second water passage state cannot be completely realized is also assumed. Therefore, in this preferred embodiment, by providing a guide surface as a resistance means for resistance of the large bubbles BA guided to the water flow path portion 105 by the sub-water flow, the moving speed of the large bubbles BA is adjusted to an appropriate one, It is assumed that the second water passage state in which the water path portion 105 is filled with water is surely generated.

  In this embodiment, the large bubbles BA are guided to the water passage portion 105 while pressing the large bubbles BA against the walls 10h, 10i, and 10j that are the guide surfaces. Therefore, the friction force generated between the guide surfaces and the large bubbles BA is used. In addition, the moving speed of the large bubble BA can be continuously adjusted from the air inlet 10a side to the water passage section 105.

  In the present embodiment, since the auxiliary water flow WSs is used as the large bubbles BA that are pressed against the walls 10h, 10i, and 10j that are the guide surfaces, there is no need to separately provide a means for pressing the large bubbles BA against the guide surfaces. The moving speed of the large bubble BA can be adjusted reliably.

  In the present embodiment, the vicinity of the air inlet 10a and the vicinity of the injection port 10b are connected by a smooth continuous surface, so that the state where the large bubble BA is in contact with the guide surface can be maintained more reliably. .

  In the present embodiment, since the large bubble BA is maintained in communication with the air inlet 10a, the large bubble BA and the auxiliary water stream WSs come into contact with each other at the portion other than the connected portion. The contact area between the BA and the auxiliary water stream WSs is reduced. Therefore, since the speed at which the large bubbles BA move to the water flow path portion 105 can be reduced, the second water flow state in which the water flow path portion 105 is filled with water can be surely generated.

  In the present embodiment, the arrangement of the air inlets 10a is devised in order to use the characteristics of the velocity distribution of the swirling flow. Since the air introduction port 10a is arranged on the injection port 10b side in the traveling direction of the jet flow WSs, it is possible to introduce air into a region where the flow velocity of the swirl flow is the lowest and grow it into a large bubble.

  Furthermore, in this embodiment, in order to ensure that the bubbles that grow in a state communicating with the air introduction port 10a are large bubbles, the flow velocity of the swirling flow is rapidly increased so that the bubbles in the middle of growth are not separated from the air introduction port 10a. Is provided with a decelerating portion for decelerating. When the swirling flow is decelerated in the deceleration unit, the flow is disturbed. In this embodiment, the influence of the disturbance is reduced by devising the arrangement position of the deceleration unit. Moreover, in this embodiment, the water reservoir chamber 10 is formed with a wall 10f which is a first wall surface constituting an inner wall surface on which one side of the water reservoir chamber side opening 10c connected to the discharge port is formed, and an injection port 10b on one side. A wall 10h that is the second wall surface constituting the inner wall surface, and 10g that is the third wall surface that connects the other side of the wall 10f that is the first wall surface and the other side of the wall 10h that is the second wall surface. The reduction part is comprised by joining so that the wall 10f which is a 1st wall surface, and the wall 10g which is a 3rd wall surface may comprise the bending surface which is not connected smoothly.

  Thus, the distance between the speed reduction part and the air inlet 10a is ensured by arranging the speed reduction part from the discharge port NAa in the traveling direction of the jet flow WSm. Thus, by arranging the speed reduction part away from the air inlet 10a to some extent, the disturbance of the sub-water flow WSs, which is a swirling flow in which the flow is disturbed in the speed reduction part, is attenuated, and the disturbance converges in a region where bubbles grow. It flows as a swirling flow. Accordingly, it is possible to maintain the communication state between the air inlet 10a and the growing bubble and promote stable bubble growth.

  Further, the swirl flow that has reached the vicinity of the discharge port along the jet WSm flows from the wall 10f that is the first wall surface along the wall 10g that is the third wall surface, and further from the wall 10g that is the third wall surface to the second wall surface. It flows along a certain wall 10h. The wall 10f, which is the first wall surface, and the wall 10g, which is the third wall surface, are not smoothly connected and form a bent surface. Therefore, the auxiliary water flow WSs that is a swirling flow that flows along the wall 10f that is the first wall surface is suddenly changed in direction of travel by the wall 10g that is the third wall surface, and flows along the wall 10g that is the third wall surface. become. Thus, the deceleration part is comprised using the direction change of the subwater flow WSs which is a swirl flow. As a mode of decelerating the swirling flow, for example, a configuration in which a plurality of small ribs are set up to inhibit the flow can be considered. However, in such a case where a plurality of small ribs are erected, the swirl flow is divided into a plurality of flows, and although the flow velocity can be reduced, if the turbulence is converged to reach the air inlet, It is necessary to lengthen the distance from the deceleration unit to the air inlet. On the other hand, in this embodiment, since it decelerates by changing the advancing direction of the whole swirling flow, it can suppress that a shunt flow generate | occur | produces and it becomes easy to converge the disturbance of a flow.

  In the present embodiment, since the auxiliary water flow inlet 10d is provided in the vicinity of the bent surface, the auxiliary water flow having a low flow velocity can be introduced in the vicinity of the bent surface, and the flow different from the swirl flow in the vicinity of the bent surface. Slow water can be placed. After the swirling flow flows along the first wall surface 10f, the swirling flow enters and collides with the stagnation water and is decelerated, and then collides with the bent surface and is decelerated. Thus, the turbulence which generate | occur | produces in a turning flow can be reduced by decelerating the subwater flow WSs which is a turning flow in steps. Furthermore, by providing the auxiliary water flow introduction port 10d and introducing the auxiliary water flow, the flow velocity of the swirling flow is made slower than when the water reservoir chamber 10 is filled with water only by the water introduced from the injection port 10b. Since it becomes easy to control, the air introduced into the water reservoir 106 from the air inlet 10a can be maintained in communication with the air inlet 10a, and large bubbles can be generated more stably. it can.

  Further, in the present embodiment, the vicinity of the speed reduction portion (the portion where the wall 10f and the wall 10g intersect) so as not to cause a new turbulence in the sub-water flow that is a swirling flow from the speed reduction portion to the air inlet 10a. Since the vicinity of the air inlet 10a is connected by a smooth continuous surface, even if the swirling flow is turbulent in the speed reduction portion, no new turbulence is generated thereafter, and the swirling flow disturbance in the vicinity of the air inlet 10a is disturbed. Can be more reliably reduced.

  FIG. 21 shows a photograph of a state in which water corresponding to the water reservoir 10 of the present embodiment was actually created and water was passed. FIG. 21A is a photograph of a state in which the jet WSm travels in the accumulated water PW and bubbles BA are growing, and corresponds to the state of FIG. FIG. 21B is an image of a state in which the jet WSm is traveling in the bubble BA, and corresponds to the state in FIG. FIG. 21C is a photograph of the state in which the jet WSm is traveling in the bubble BA, and corresponds to the state in FIG.

  As described above, the water discharge device according to the present embodiment is the local cleaning device WA, which discharges water toward the human body, and the first water supply pipe 102 which is a water supply channel for supplying water, and the first An injection port 10b that injects water supplied from the water supply pipe 102 toward the downstream side as a jet flow WSm, a discharge port NZa that is provided on the downstream side of the injection port 10b and discharges the jet flow WSm to the outside, and an injection port 10b Is formed between the nozzle 10a and the discharge port NZa, and is formed adjacent to the water flow path part 105 and the water flow path part 105 through which the jet flow WSm from the injection port 10b to the discharge port NZa passes. A water reservoir chamber 10 having a water reservoir portion 106 and an air inlet 10a that exhibits at least a part of the function of a bubble supply means for supplying bubbles BA in the form of air to the water flow path portion 105.

  The bubble supply means generates large bubbles BA having a cross-sectional area larger than the flow passage cross-sectional area of the injection port 10b when the inside of the water reservoir chamber 10 is viewed from the injection port 10b (see FIG. 17). By forming the large bubbles BA intermittently, a first water flow state in which the jet WSm passes through the large bubbles BA (see FIG. 15) and a second water flow state in which the jet WSm passes through the water. (Refer to FIGS. 4 and 7, etc.) are alternately and repeatedly generated to vary the water flow resistance of the jet WSm in the water flow path portion 105.

  In the present embodiment, since the large bubble BA having a cross-sectional area larger than the flow path cross-sectional area of the injection port 10b is intermittently formed, the first water flow state in which the jet WSm passes through the large bubble BA, The second water flow state through which the jet WSm passes can be alternately and repeatedly generated. In the first water flow state, the jet WSm penetrates through the large bubble BA, so that there is a lot of air around the jet WSm, the resistance to decelerate the jet WSm is weak, and the speed of the jet WSm is discharged while being maintained. Head towards exit NZa. On the other hand, in the second water flow state, since the jet WSm passes through the water, the periphery of the jet WSm is surrounded by water, the resistance to decelerate the jet WSm is strong, and the speed of the jet WSm decreases while heading toward the discharge port NZa. . Therefore, by alternately and repeatedly generating the first water flow state and the second water flow state, it is possible to greatly change the speed of the jet WSm toward the discharge port NZa and to give a large flow rate fluctuation to the water discharge. Even when the distance to landing is short, a sufficiently large water mass can be formed.

  In the present embodiment, the jet WSm is contracted and ejected from the ejection port 10b so that the cross-sectional area of the jet WSm is smaller than the cross-sectional area of the large bubble BA. In this way, the jet WSm is contracted and ejected from the ejection port 10b, so that the diffusion of the jet WSm is suppressed and its cross-sectional area can be reliably controlled. Accordingly, a state in which the cross-sectional area of the jet WSm is smaller than the cross-sectional area of the large bubble BA can be reliably formed, and the first water flow state can be reliably realized. be able to.

  Further, in the present embodiment, the bubble supply means supplies the large bubble BA toward the injection port 10 b of the water flow path unit 105. Thus, since the large bubble BA is supplied to the injection port 10b of the water flow path portion 105, the large bubble BA is stretched toward the discharge port NZa by the penetrating jet WSm. Therefore, the large bubble BA can exist in a long range from the injection port 10b side to the discharge port NZa side by a simple method of supplying the large bubble BA toward the injection port 10b. As a result, the length of the jet that penetrates the large bubble BA is increased, and the deceleration of the jet WSm in the first water flow state can be avoided more reliably, and the first water flow state can be reliably realized. Therefore, a large flow rate fluctuation can be given to the water discharge.

  In the present embodiment, the bubble supply means supplies the large bubble BA so as to cover the injection port 10b (see FIG. 16). Thus, by supplying the large bubble BA so as to cover the injection port 10b, the vicinity of the injection port 10b can be covered with air. Therefore, in the first water flow state, the generation of vortices around the injection port 10b is suppressed, and the disturbance of the jet WSm accompanying the generation of vortices can be suppressed. As a result, since the progress of the jet WSm is stabilized and the first water flow state can be reliably realized, a large flow velocity fluctuation can be given to the water discharge.

  In the present embodiment, an air introduction port 10a is provided for taking air into the water reservoir chamber 10 from the outside, and extends in the vicinity of the air introduction port 10a from the air introduction port 10a side toward the water flow path portion 105 side. An inner wall surface of the water reservoir 10 is provided as a guide surface for promoting the growth of the bubbles BA (see FIG. 8).

  The air taken into the water reservoir 10 from the air inlet 10a tends to be separated from the air inlet 10a by the water flow in the water reservoir 10 before it becomes a large bubble BA and torn off. Therefore, since the foam-like air taken in from the air inlet 10a is supported by the inner wall surface as a guide surface provided in the vicinity, the growth is stably promoted even when subjected to water, and the large bubble BA Can grow into. Therefore, since the first water flow state can be surely realized, a large flow velocity fluctuation can be given to the water discharge.

  Further, the bubble supply means of the present embodiment generates a large bubble BA having a cross-sectional area larger than the flow passage cross-sectional area of the injection port 10b in the discharge pipe 103, and the large bubble BA is intermittently generated. The first water flow state (see FIG. 20) in which the jet flow WSm passes through the air layer formed along the inner wall surface of the discharge pipe 103 by the large bubbles BA, and the discharge from the water reservoir chamber 10 The second water flow state (see FIG. 6) in which the jet WSm passes through the water supplied to the pipe line 103 is alternately generated repeatedly, and the water flowing in the discharge pipe line 103 and the inner wall surface of the discharge pipe line 103 The contact area with is varied.

  According to this aspect, since the bubble supply means intermittently generates a large bubble BA having a cross-sectional area larger than the flow path cross-sectional area of the injection port 10b and supplies the large bubble BA to the discharge pipe 103, the inside of the discharge pipe 103 A first water flow state where the jet WSm passes through the air layer formed along the wall surface, and a second water flow state where the jet WSm passes through the water supplied from the water reservoir chamber 10 to the discharge pipe 103. Can be repeatedly generated alternately. In the first water flow state, since the jet WSm passes through the air layer formed in the discharge pipe 103, the contact area between the inner wall surface of the discharge pipe 103 and the jet WSm becomes small, and the discharge pipe 103. The frictional resistance received by the jet WSm traveling inside is reduced. On the other hand, in the second water flow state, since the jet WSm passes through the water supplied from the water reservoir 10, the contact area between the inner wall surface of the discharge pipe 103 and the water containing the jet WSm increases, and the discharge pipe The frictional resistance received by the jet WSm traveling in the passage 103 is increased. Therefore, by alternately and repeatedly generating the first water flow state and the second water flow state, the contact area between the water flowing through the discharge pipe 103 and the inner wall surface of the discharge pipe 103 is changed. Due to the fluctuation of the frictional resistance, the speed of the jet WSm toward the discharge port NZa can be greatly changed to give a large flow rate fluctuation to the water discharge, and even if the distance from the water discharge to the water landing is short, A lump can be formed.

  Further, since the jet WSm passes through the air layer formed in the discharge pipe 103 in the first water flow state, if attention is paid to the flow of the entire water in the discharge pipe 103, the second water flow state Rather than a substantial cross-sectional area of the flow path. Therefore, it becomes one of the factors that the velocity of the jet WSm passing through the discharge pipe 103 in the first water flow state becomes higher than the speed of water passing through the discharge pipe 103 in the second water flow state. In addition to the flow rate fluctuation of the discharged water due to the fluctuation of the frictional resistance as described above, the effect of the flow rate fluctuation of the discharged water due to the change of the channel cross-sectional area is also added, so that a large flow rate fluctuation can be given to the discharged water.

  Further, in the present embodiment, the bubble supply means generates a large bubble BA, so that the jet air WSm passing through the discharge conduit 103 is surrounded by a tubular air layer along the inner wall surface along the traveling direction. Is forming. In this way, since a tubular air layer is formed along the inner wall surface so as to surround the jet WSm along the traveling direction, the contact area between the jet WSm and the inner wall surface of the discharge pipe 103 can be further reduced. Can do. Therefore, the speed of the jet WSm in the first water-flowing state can be sufficiently higher than the speed of water in the second water-passing state, and a large flow velocity fluctuation can be given to the water discharge.

  Further, in the present embodiment, the bubble supply means supplies large bubbles BA from the water flow path portion 105 to the discharge conduit 103, and the water reservoir chamber side opening, which is an opening where the discharge conduit 103 faces the water reservoir chamber 10. Large bubble BA is supplied so that the outer periphery of 10c may be covered.

  In this way, since the large bubble BA is supplied from the water passage portion 105 side so as to cover the outer periphery of the water reservoir chamber side opening 10c, which is the opening facing the water reservoir chamber 10, the inner wall surface of the discharge conduit 103 is provided. Large bubbles BA can be fed so as to follow along. Therefore, it becomes easy to form a tubular air layer along the inner wall surface of the discharge conduit 103, and a large flow velocity fluctuation can be given to the water discharge.

  Further, in this embodiment, the bubble supply means supplies large bubbles BA from the water flow path portion 105 to the discharge conduit 103, and when the water flow passage portion 105 side is viewed from the discharge conduit 103 side. Then, the large bubble BA is supplied so as to have a cross-sectional area larger than the cross-sectional area of the discharge pipe 103.

  As described above, since the large bubble BA is supplied so as to have a cross-sectional area larger than the flow passage cross-sectional area of the discharge pipe 103, the large bubble BA can be sent while being surely aligned with the inner wall surface of the discharge pipe 103. it can. Therefore, it becomes easier to form a tubular air layer along the inner wall surface of the discharge pipe 103 more reliably, and a large flow velocity fluctuation can be given to the water discharge.

  Moreover, in this embodiment, when supplying the large bubble BA from the water flow path unit 105 to the discharge conduit 103, the bubble supply means temporarily supplies the bubble. As described above, when the large bubble BA is supplied from the water flow path portion 105 to the discharge pipe 103, the large bubble BA is temporarily retained and supplied, so that the large bubble BA is easily attached to the inner wall surface of the discharge pipe 103. . Therefore, it becomes easier to form a tubular air layer along the inner wall surface of the discharge pipe 103 more reliably and easily, and a large flow rate fluctuation can be given to the water discharge.

  In the present embodiment, the bubble supply means generates and supplies the large bubble BA so that the air layer is formed in a length substantially equal to the length along the traveling direction of the jet flow WSm of the discharge pipe 103. It is also preferable. In this preferred embodiment, since the large bubble BA is supplied so that an air layer is formed over the entire length of the discharge pipe 103, a tubular air layer can be formed from the water reservoir 10 to the discharge port NZa. . Therefore, in the first water flow state, the frictional resistance experienced by the jet WSm from the water reservoir 10 to the discharge port NZa can be made extremely small, and a large flow velocity fluctuation can be given to the water discharge.

  Further, in the present embodiment, the injection port 10b and the discharge pipe 103 are arranged so that the central axis of the jet flow WSm injected from the injection port 10b is located substantially on the same straight line as the central axis of the discharge pipe 103. In addition, the flow passage cross-sectional area of the discharge pipe 103 is larger than the flow passage cross-sectional area of the injection port 10b.

  Thus, since the central axis of the jet flow WSm ejected from the ejection port 10b is arranged so as to be substantially collinear with the central axis of the discharge pipe 103, the center of the discharge pipe 103 and the discharge pipe The center of the jet WSm entering the path 103 can be aligned. Further, since the flow passage cross-sectional area of the discharge pipe 103 is formed larger than the flow passage cross-sectional area of the injection port 10b, the gap between the jet flow WSm and the inner wall surface of the discharge pipe 103 is surely secured. Can keep. Therefore, a tubular air layer can be formed in the gap, and the jet WSm can be surely passed through the tubular air layer.

  Further, the bubble supply means of the present embodiment causes the air introduced into the water reservoir chamber 10 from the air introduction port 10a to grow greatly in a bubble shape over time, and is large when the bubble BA reaches a predetermined size. It supplies to the water flow path part 105 as bubble BA, Furthermore, until the air introduce | transduced from the air introduction port 10a becomes large bubble BA and is supplied to the water flow path part 105, it is the air introduction port 10a and A first water flow state (see FIGS. 4 and 7) in which a sub-water flow WSs having a relatively low flow rate capable of maintaining a state in which the bubbles BA are in communication is formed in the water reservoir chamber 10 (see FIGS. 4 and 7), and is introduced from the air inlet 10a The sub-water flow WSs having a relatively high flow rate capable of separating the bubbles BA from the air introduction port 10a is formed in the water reservoir chamber 10 so that the generated air becomes large bubbles BA and is supplied to the water flow path portion 105. Second water flow state (Figure 4 reference) and, is repeatedly generated alternately.

  According to this aspect, in the first water flow state, the sub-water flow WSs having a relatively low flow rate capable of maintaining the state where the air inlet 10a and the bubble BA are in communication with each other is formed in the water reservoir chamber 10, so that the air The bubble BA formed by the air introduced from the inlet 10a can be grown without tearing. On the other hand, in the second water flow state, the bubble BA can be separated from the air introduction port 10a so that the air introduced from the air introduction port 10a becomes a large bubble BA and is supplied to the water flow path unit 105. Since the secondary water flow WSs having a high flow rate is formed in the water reservoir chamber 10, the bubbles BA grown in the first water flow state can be separated and supplied as large bubbles BA to the water flow path unit 105. By alternately and repeatedly generating the first water flow state and the second water flow state, a period in which the large bubble BA is not supplied to the jet WSm and a period in which the large bubble BA is supplied to the jet WSm are alternately repeated. Can be generated. In the period when the large bubble BA is supplied to the jet WSm, the speed of the jet WSm is maintained toward the discharge port NZa while being maintained. On the other hand, in the period when the large bubble BA is not supplied to the jet WSm, the jet flow WSm moves toward the discharge port NZa while the velocity of the jet WSm decreases. Therefore, by alternately and repeatedly generating the first water flow state and the second water flow state, the speed of the jet WSm toward the discharge port NZa can be greatly changed to give a large flow rate fluctuation to the discharged water. Even when the distance is short, a sufficiently large water mass can be formed.

  Further, in the present embodiment, the water reservoir chamber 10 is provided with an inner wall of the water reservoir chamber 10 that extends from the air introduction port 10a side toward the water flow path portion 105 side and functions as a guide surface that promotes the growth of the bubble BA. The supply means guides the air bubbles BA formed by the air introduced from the air introduction port 10a to the vicinity of the water flow path portion 105 while maintaining the state where the air bubbles BA are in contact with the inner wall as the guide surface (see FIGS. 7 and 8).

  The gas-liquid interface, which is the boundary between air and water, is easily deformed because it is formed by the balance of forces that air and water interact with each other. If the balance of forces is lost, the gas-liquid interface also collapses. Therefore, in the first water flow state in which the bubbles BA are grown, it is necessary to keep the area of the gas-liquid interface where air and water are in contact as small as possible in order to grow the bubbles BA stably. Therefore, by maintaining the state where the air bubbles BA formed by the air introduced from the air inlet 10a are in contact with the inner wall as the guide surface, the area of the gas-liquid interface is reduced from the air inlet 10a side to the water passage section 105 side. It is possible to decrease, maintain the communication state between the air inlet 10a and the growing bubble BA, and promote stable bubble growth.

  Further, in the present embodiment, the bubble supplying means is in the vicinity of the water flow path portion 105 while pressing the bubbles BA formed by the air introduced from the air inlet toward the inner wall as the guide surface by the sub-water flow WSs in the first water flow state. (See FIGS. 7 and 9).

  In the water reservoir 10, a negative pressure is generated because the jet WSm is injected from the injection port 10b toward the discharge port NZa. Since this negative pressure acts on the bubbles BA formed in the water reservoir 10, the bubbles BA may receive a force that is separated from the wall surface that is the guide surface. Therefore, since the bubble BA is pressed against the wall surface as the guide surface by the sub-water flow WSs in the first water flow state, the bubble BA is not pulled away from the wall surface as the guide surface even if negative pressure is applied, and the air inlet port It is possible to reduce the area of the gas-liquid interface from the 10a side to the water passage section 105 side, maintain the communication state between the air inlet 10a and the growing bubble BA, and promote stable bubble growth.

  Further, in the present embodiment, the bubble supply means passes while pressing the bubble BA formed by the air introduced from the air introduction port 10a in the direction against the buoyancy acting on the bubble BA by the secondary water flow WSs in the first water flow state. It leads to the vicinity of the water path portion 105 (see FIG. 9).

  In this way, the buoyancy acting on the growing bubble BA and the secondary water flow WSs formed so as to press the bubble BA in a direction against the buoyancy are balanced, so that the bubble BA can be stably grown. . For example, even if the flow velocity of the secondary water flow WSs in the first water flow state is slightly increased, the surplus of the force by which the secondary water flow WSs presses the bubble BA against the wall surface as the guide surface can be reduced by the buoyancy of the bubble BA. Thus, it becomes possible to eliminate an excessive influence due to the substream WSs, maintain the communication state between the air inlet 10a and the growing bubble BA, and promote stable bubble growth.

  Moreover, in this embodiment, a guide surface has the 1st surface where a bubble is pressed, and the 2nd surface and 3rd surface which are opposingly arranged on both sides of the 1st surface (refer FIG. 8). Thus, since the guide surface is constituted by the first surface, the second surface, and the third surface, the air bubbles BA formed by the air introduced from the air introduction port 10a are pressed against the first surface while the second surface and the second surface are pressed. It can also contact three sides. Accordingly, it is possible to reduce the area of the gas-liquid interface where the side stream WSs and the bubble BA are in contact with each other, maintain the communication state between the air inlet 10a and the growing bubble BA, and promote stable bubble growth. It becomes possible.

  Further, in the present embodiment, the secondary water flow is introduced into the water reservoir chamber 10 from the secondary water flow inlet 10d formed independently of the injection port 10b. As described above, since the auxiliary water flow WSs is introduced from the auxiliary water flow introduction port 10d formed independently of the injection port 10b, the water introduced from the injection port 10b is separated into the auxiliary water flow WSs. In comparison, it becomes easier to control the flow rate of the auxiliary water stream WSs to a lower speed. Therefore, it is possible to maintain the communication state between the air inlet 10a and the growing bubble BA and promote stable bubble growth.

  In the present embodiment, the sub-water flow WSs presses the bubbles BA formed by the air introduced from the air introduction port 10a against the guide surface without interfering with the jet flow WSm. As described above, since the secondary water flow WSs is caused to act on the bubble BA without interfering with the jet flow WSm, the secondary water flow WSs is not accelerated by the action of the jet flow WSm. Therefore, the secondary water stream WSs is not excessively accelerated in the first water flow state and the bubbles BA are not torn off, and the communication state between the air inlet 10a and the growing bubble BA is maintained, and stable bubble growth is promoted. It becomes possible.

  In the present embodiment, the size of the air introduction port 10a is such that the bubble BA formed by the air introduced from the air introduction port 10a is disconnected from the air introduction port 10a depending on the sub-water flow WSs in the first water flow state. The size is set so that it does not hit.

  When bubbles are grown in the first water flow state, the bubbles BA are deformed when the bubbles BA and the sub-water flow WSs come into contact with each other. Therefore, the size of the air introduction port 10a is set so that the communication state with the air introduction port 10a is not cut off depending on the sub water flow WSs in the first water flow state. Even if the bubble BA is deformed by the action, the communication state between the air inlet 10a and the growing bubble BA can be maintained, and the large bubble BA can be supplied.

  Further, the bubble supply means of the present embodiment generates a large bubble BA having a cross-sectional area larger than the flow path cross-sectional area of the injection port 10b when the inside of the water reservoir 10 is viewed from the injection port 10b. The large bubble BA is intermittently formed and supplied to the water passage 105 so that the first state in which the jet WSm is pressurized and accelerated and the second state in which the jet WSm is not accelerated are alternately generated repeatedly. Let

  According to this aspect, since the bubble supply means intermittently forms the large bubble BA having a cross-sectional area larger than the flow path cross-sectional area of the injection port 10b, the first state in which the jet WSm is pressurized and accelerated, The second state in which the acceleration is not accelerated can be alternately generated repeatedly. In the first state, since the jet WSm is pressurized and accelerated, the velocity of the jet WSm increases toward the discharge port NZa. On the other hand, in the second state, since the jet WSm is not accelerated, the speed of the jet WSm does not increase and moves toward the discharge port NZa. Accordingly, by alternately and repeatedly generating the first state and the second state, the speed of the jet WSm toward the discharge port NZa can be greatly changed to give a large flow rate fluctuation to the discharged water. Even when the distance is short, a sufficiently large water mass can be formed.

  Further, in the present embodiment, in the first state, the large bubble BA is pressurized from the upstream side with respect to the large bubble BA supplied to the water flow path unit 105 by the jet WSm, and the pressurized large bubble BA is downstream of the large bubble BA. The jet WSm is pressurized and accelerated (see FIG. 18). Thus, since the large bubble BA pressurized by the jet flow WSm pressurizes the jet flow WSm on the further downstream side, the jet flow WSm is further accelerated in the first state, and the velocity of the jet flow WSm is greatly changed to cause a large flow rate in the discharged water. Variations can be given.

  In the present embodiment, in the first state, when the large bubble BA supplied to the water flow path portion 105 is discharged from the discharge port NZa, the jet WSm discharged from the discharge port NZa is pressurized and accelerated. Yes. As described above, when the large bubble BA supplied to the water flow path portion 105 is discharged from the discharge port NZa, the jet WSm discharged from the discharge port NZa is pressurized and accelerated by using the force that is released to the atmosphere and blows out. Therefore, the jet WSm is further accelerated in the first state, and the velocity of the jet WSm can be greatly varied to give a large flow velocity fluctuation to the water discharge.

  Further, in the present embodiment, in the first state, when the large bubble BA supplied to the water flow path portion 105 is discharged toward the discharge port NZa, the discharge pipe 103 extending from the water reservoir 10 toward the discharge port NZa. Large bubble BA is supplied so that it may become the magnitude | size which covers the water reservoir chamber side opening 10c.

  Thus, since the large bubble BA is supplied so as to cover the water reservoir chamber side opening 10c when discharged from the water reservoir 10 toward the discharge port NZa, the large bubble BA is not discharged without resistance. It is discharged while receiving resistance from the water reservoir chamber side opening 10c temporarily. Therefore, in the process, the large bubble BA receives pressure from the jet WSm, and the internal pressure of the large bubble BA increases. As a result, in the first state, the jet WSm is pressurized and accelerated by receiving a larger pressure from the large bubble BA, and the speed of the jet WSm can be greatly changed to give a large flow rate fluctuation to the water discharge.

  In the present embodiment, in the first state, it is also preferable to supply the large air bubble BA near the water reservoir chamber side opening 10c of the water flow path portion. In this preferred embodiment, since the large bubble BA is supplied closer to the water reservoir chamber side opening 10c, the bubble BA does not divide and reaches the water reservoir chamber side opening 10c without fail. Accordingly, the internal pressure of the large bubble BA is reliably increased, and the jet WSm is pressurized and accelerated in response to a larger pressure from the large bubble BA in the first state, and the velocity of the jet WSm is greatly changed to discharge water. Large flow rate fluctuations can be given.

  Further, the bubble supply means in the present embodiment changes the size of the bubble BA as a stationary bubble that is a bubble that is formed by the air introduced from the air inlet 10a and temporarily stays in the water reservoir 106, The first state (see FIG. 7) in which the volume of water in the water reservoir 106 is relatively reduced by increasing the bubble BA as a stationary bubble (see FIG. 7), and the water in the water reservoir 106 by reducing the bubble BA as a stationary bubble. By alternately and repeatedly generating a second state (see FIG. 4) in which the capacity of the water is relatively increased, the pressure in the water reservoir 10 is changed.

  According to this aspect, since the bubble supply means changes the size of the bubble BA as the stationary bubble, which is a bubble that temporarily stays in the water reservoir 106, the bubble BA of the water reservoir 106 is increased by increasing the bubble BA as the stationary bubble. A first state in which the volume of water is relatively decreased and a second state in which the volume of water in the water reservoir 106 is relatively increased by reducing the bubble BA as a stationary bubble are alternately generated repeatedly. it can. As described above, by alternately and repeatedly generating the first state and the second state, it is possible to change the water pressure in the water reservoir chamber 10 and greatly change the speed of the jet WSm toward the discharge port NZa. A large flow rate fluctuation can be given. Therefore, a sufficiently large water mass can be formed even when the distance from water discharge to landing is short.

  Moreover, in this embodiment, it is provided with the swirl flow production | generation means which produces | generates the subwater flow WSs swirling in the water reservoir part 106, and a swirl flow production | generation means fluctuates the capacity | capacitance of the water in the water reservoir part 106, and rotates the subwater flow The swirling diameter of WSs is changed, and the speed of the jet flow WSm discharged from the discharge port NZa is changed. As described above, since the swirling diameter of the sub-water flow WSs that is a swirling flow is changed, the aspect in which the sub-water flow WSs affects the jet flow WSm is changed, and the speed of the jet flow WSm discharged from the discharge port NZa is changed. Can do.

  Further, in the present embodiment, the air introduction port 10a which is a formation position where the bubble BA as a stationary bubble is formed and a region below the air introduction port 10a and the sub water flow introduction port 10d which is an inflow position where the sub water flow WSs enters the water reservoir 106 are provided. Spaced apart. As described above, the air introduction port 10a that is a formation position where the bubble BA as the stationary bubble is formed and a region below the air introduction port 10a are separated from the sub-water flow introduction port 10d that is an inflow position where the sub-water flow WSs enters the water reservoir 106. Therefore, even if the size and position of the bubble BA as the stationary bubble fluctuate rapidly, it is possible to reduce the direct influence on the trajectory of the sub-water flow WSs that is a swirling flow. Therefore, the influence of the jet flow WSm on the speed fluctuation can be reduced, and the jet WSm having a stable fluctuation mode can be discharged.

  In the present embodiment described above, the secondary water flow introduction port 10d is provided separately from the injection port 10b in order to form the secondary water flow WSs, but the secondary water flow WSs is formed without providing the secondary water flow introduction port 10d. This is also a preferred embodiment. A modification from this viewpoint will be described with reference to FIGS.

  FIG. 22 is a view showing a water reservoir chamber 10 </ b> L as a modified example in which the auxiliary water flow WSs is formed in the water reservoir chamber 10. FIG. 23 is a diagram for explaining the transition of the flow of the sub-water flow WSs in the modification shown in FIG.

  The water reservoir 10L is formed by omitting the auxiliary water flow inlet 10d of the water reservoir 10 and expanding the diameter of the injection port 10b to form the injection port 10bL. By forming the injection port 10bL whose diameter is increased in this way, a part of the jet flow WSm is changed in direction, and the sub-water flow WSs is formed as the split flow WSd.

  As shown in FIG. 23A, when the bubble BA is small, the pressure in the water reservoir 10L is low, so that the partial flow WSd has a relatively large flow rate and the sub-water flow WSs has a large flow rate. On the other hand, as shown in FIG. 23 (B), when the bubble BA increases, the pressure in the water reservoir 10L increases, the partial flow rate WSd decreases, and the auxiliary water flow WSs decreases.

  FIG. 24 is a view showing a water reservoir chamber 10M as a modified example in which the auxiliary water flow WSs is formed in the water reservoir chamber 10. The water reservoir chamber 10M is provided with a reduced diameter member 10cM so as to close a part of the water reservoir chamber-side opening 10c by omitting the auxiliary water flow inlet 10d of the water reservoir chamber 10. By configuring in this way, a part of the jet flow WSm is changed in direction by the reduced diameter member 10cM, and the auxiliary water flow WSs is formed as the branch flow WSd.

  FIG. 25 is a diagram showing a water reservoir chamber 10Ma provided with a reduced diameter member 10cMa as a large bubble discharge suppression means in the water reservoir chamber. The water reservoir 10Ma is provided with a reduced diameter member 10cMa so as to close a part of the water reservoir chamber-side opening 10c by omitting the sub-water flow inlet 10d of the water reservoir 10. By configuring in this way, the large bubble discharge suppressing means can be realized with a simple configuration in which the flow passage cross-sectional area of the water reservoir chamber side opening 10c is made smaller than the cross-sectional area of the large bubble BA. Large bubbles BA can be wrapped around WSm.

  The jet WSm ejected from the ejection port 10b proceeds to the ejection port without interfering with the inner wall of the water reservoir 10Ma and the reduced-diameter member 10cMa that is the large bubble discharge suppression means.

  By being configured in this way, the traveling direction of the jet WSm is excessively changed by the inner wall of the water reservoir chamber 10Ma and the reduced diameter member 10cM, and the water outlet side (water reservoir chamber side opening 10c side) of the water flow path portion 105 is formed. ), It is possible to prevent a large flow from occurring in the water reservoir 106. Therefore, it is possible to suppress the large air bubbles BA that are supplied to the water flow path portion 105 and stay due to the action of the reduced diameter member 10cMa, which is the large air bubble discharge suppressing means, from flowing back to the water reservoir portion 106, and the smooth first flow is achieved. It can contribute to the alternate generation of the water state and the second water flow state.

  As described above, in the water reservoir chamber 10Ma, the large bubble BA is supplied to a position near the injection port 10b of the water flow passage portion 105, and the reduced diameter member 10cMa is a water discharge port (water reservoir chamber side opening 10c side) of the water flow passage portion 105. The large bubble BA is temporarily retained at a position close to it.

  Thus, since the large bubble BA is supplied to the injection port 10b of the water flow path portion 105 near the injection port 10b (see FIG. 25A), the large bubble BA is discharged to the discharge port side by the jet WSm injected from the injection port 10b. It is stretched to the (water reservoir chamber side opening 10c side). Therefore, the large bubble BA can be present in a long range from the injection port 10b side to the discharge port side (water reservoir chamber side opening 10c side) by a simple method of supplying the large bubble BA closer to the injection port 10b. As a result, the length of the jet WSm penetrating the large bubble BA is increased, the deceleration of the jet WSm in the first water flow state can be more reliably avoided, and the first water flow state can be reliably realized. As a result, large fluctuations in flow velocity can be given to the water discharge.

  Furthermore, since the large air bubbles BA are temporarily retained at a position near the water discharge port (water reservoir chamber side opening 10c) of the water flow passage portion 105 (see FIG. 25B), the water flow passage portion 105 is supplied. The large bubble BA stays while moving from the water outlet (water reservoir chamber side opening 10c). Therefore, even if the large bubble BA does not exist near the injection port 10b of the water passage unit 105, which is a supply portion of the large bubble BA, and the large bubble of the next cycle is supplied to the water passage unit 105, It can suppress contacting and connecting with the large bubble BA of a cycle. Therefore, the first water flow state and the second water flow state can be reliably generated alternately.

  In the present embodiment, it is indispensable to cause fluctuations in water resistance more reliably in order to form a sufficiently large water mass. For that purpose, in the first water flow state, it is necessary to arrange the large bubbles BA from the very vicinity of the injection port 10b to the very vicinity of the discharge port (water reservoir chamber side opening 10c). For example, when the length of the water flow path portion 105 cannot be ensured sufficiently or the flow velocity of the jet flow WSm is high, the large bubbles BA supplied to the water flow path portion 105 have sufficient time for the first water flow state. It is also assumed that it cannot stay as much as it forms.

  Therefore, the large bubble BA moving along the circumference of the jet WSm is prevented from moving to the discharge port side (moving beyond the water reservoir chamber side opening 10c), and the large bubble BA is temporarily passed through the water passage path portion 105. The reduced-diameter member 10cMa is provided as a large bubble discharge restraining means for staying around. By providing the large bubble discharge suppression means in this way, the large bubbles BA supplied to the water flow path unit 105 remain around the water flow path unit 105 without being immediately discharged. For this reason, the large bubbles BA easily flow around the jet WSm, and it is possible to reliably form the first water flow state in which the jet WSm passes through the large bubble BA, and the second water flow state alternately. By generating a single water flow state, it is possible to reliably generate fluctuations in the flow rate of discharged water. In this way, it is possible to greatly change the speed of the jet flow toward the discharge port to give a large flow velocity fluctuation to the water discharge, and to form a sufficiently large water mass even when the distance from the water discharge to the water landing is short Can do.

  FIG. 26 is a view showing a water reservoir chamber 10Mb provided with a reduced diameter member 10cMb as a large bubble discharge suppression means in the water reservoir chamber. The water reservoir chamber 10Mb is provided with a reduced diameter member 10cMb so as to close a part of the water reservoir chamber-side opening 10c, omitting the sub-water flow inlet 10d of the water reservoir chamber 10. By configuring in this way, the large bubble discharge suppressing means can be realized with a simple configuration in which the flow passage cross-sectional area of the water reservoir chamber side opening 10c is made smaller than the cross-sectional area of the large bubble BA. Large bubbles BA can be wrapped around WSm.

  The jet WSm ejected from the ejection port 10b proceeds to the ejection port without interfering with the inner wall of the water reservoir chamber 10Mb and the reduced diameter member 10cMb, which is a large bubble discharge suppression means.

  By being configured in this way, the traveling direction of the jet WSm is excessively changed by the inner wall of the water reservoir chamber 10Mb and the reduced diameter member 10cMb, and the water outlet side (water reservoir chamber side opening 10c side) of the water flow path portion 105 is formed. ), It is possible to prevent a large flow from occurring in the water reservoir 106. Therefore, it is possible to suppress the large bubble BA that is supplied to the water passage unit 105 and stays by the action of the reduced diameter member 10cMb, which is a large bubble discharge suppression unit, from flowing back to the water reservoir 106, and the smooth first passage is achieved. It can contribute to the alternate generation of the water state and the second water flow state.

  As described above, in the water reservoir chamber 10Mb, the large bubble BA is supplied to a position near the injection port 10b of the water flow path portion 105, and the reduced diameter member 10cMb is a water discharge port (water reservoir chamber side opening 10c side) of the water flow path portion 105. The large bubble BA is temporarily retained at a position close to it.

  Thus, since the large bubble BA is supplied near the injection port 10b of the water flow path portion 105 (see FIG. 26A), the large bubble BA is discharged to the discharge port side by the jet flow WSm injected from the injection port 10b. It is stretched to the (water reservoir chamber side opening 10c side). Therefore, the large bubble BA can be present in a long range from the injection port 10b side to the discharge port side (water reservoir chamber side opening 10c side) by a simple method of supplying the large bubble BA closer to the injection port 10b. As a result, the length of the jet WSm penetrating the large bubble BA is increased, the deceleration of the jet WSm in the first water flow state can be more reliably avoided, and the first water flow state can be reliably realized. As a result, large fluctuations in flow velocity can be given to the water discharge.

  Further, since the large bubble BA is temporarily retained at a position near the water discharge port (water reservoir chamber side opening 10c) of the water flow passage portion 105 (see FIG. 26B), the large air bubble BA is supplied to the water flow passage portion 105. The large bubble BA stays while moving from the water outlet (water reservoir chamber side opening 10c). Therefore, the large bubble BA is prevented from moving to the discharge port side, and the large bubble BA is extended to the injection port 10b side. Therefore, the large bubble BA is more reliably formed at the end of the water flow path unit 105 on the injection port 10b side. Can be supplied.

  In the present embodiment, it is indispensable to cause fluctuations in water resistance more reliably in order to form a sufficiently large water mass. For that purpose, in the first water flow state, it is necessary to arrange the large bubbles BA from the very vicinity of the injection port 10b to the very vicinity of the discharge port (water reservoir chamber side opening 10c). For example, when the length of the water flow path portion 105 cannot be ensured sufficiently or the flow velocity of the jet flow WSm is high, the large bubbles BA supplied to the water flow path portion 105 have sufficient time for the first water flow state. It is also assumed that it cannot stay as much as it forms.

  Therefore, the large bubble BA moving along the circumference of the jet WSm is prevented from moving to the discharge port side (moving beyond the water reservoir chamber side opening 10c), and the large bubble BA is temporarily passed through the water passage path portion 105. The reduced-diameter member 10cMb is provided as a large bubble discharge restraining means for staying around. By providing the large bubble discharge suppression means in this way, the large bubbles BA supplied to the water flow path unit 105 remain around the water flow path unit 105 without being immediately discharged. For this reason, the large bubbles BA easily flow around the jet WSm, and it is possible to reliably form the first water flow state in which the jet WSm passes through the large bubble BA, and the second water flow state alternately. By generating a single water flow state, it is possible to reliably generate fluctuations in the flow rate of discharged water. In this way, it is possible to greatly change the speed of the jet flow toward the discharge port to give a large flow velocity fluctuation to the water discharge, and to form a sufficiently large water mass even when the distance from the water discharge to the water landing is short Can do.

  Furthermore, from the viewpoint of supplying the large bubble BA to the vicinity of the injection port 10b, the embodiment of the water reservoir 10S shown in FIG. 27 is also preferable. 27 includes a wall 10eS, a wall 10fS, a wall 10gS, and a wall 10hS that define the chamber, and the wall 10hS is disposed upstream of the injection port 10b.

  Thus, providing the end of the wall 10hS, which is the guide surface of the large bubble BA, on the water flow path portion 105 side on the upstream side of the injection port 10b in the traveling direction of the jet flow WSm ensures passage of the large bubble BA. This is preferable from the viewpoint of supplying the water passage portion 105 to the end portion on the injection port 10b side.

  When the large bubble BA reaches the vicinity of the water flow path portion 105, it is influenced by the jet flow WSm ejected from the jet port 10b and is pulled closer to the discharge port (water reservoir chamber side opening 10c) of the water flow path portion 105. . Therefore, by providing the end of the wall 10hS, which is a guide surface, on the upstream side of the injection port 10b, the large bubble BA is guided upstream of the injection port 10b, and the injection port of the water flow path unit 105 is more reliably provided. Large bubbles are supplied to the end on the 10b side.

WA: Local cleaning device (water discharge device)
WAa: body part WAb: toilet seat WAc: toilet lid WAd: remote control NZ: nozzle NAa: discharge port CB: toilet bowl JW: spout 10: water reservoir 10a: air inlet 10b: injection port 10c: water reservoir side opening 10d: sub Water flow inlet 101: Air pipe line 102: First water supply pipe line 103: Discharge pipe line 104: Second water supply pipe line 105: Water flow path part 106: Water reservoir part PW: Water reservoir BA: Bubble WSm: Jet WSs: Sub Water flow

Claims (4)

A water discharge device that discharges water toward a human body,
A water supply channel for supplying water;
An injection port for injecting water supplied from the water supply channel as a jet toward the downstream side;
A discharge port provided on the downstream side of the injection port, for discharging the jet flow to the outside;
While being formed between the injection port and the discharge port and forming a water storage path adjacent to the water flow path part and the water flow path part which are paths through which the jet flow from the spray port to the discharge port passes , A water reservoir chamber having a water reservoir for forming a swirling flow ;
A bubble supply means for supplying bubbles in the form of air to the water passage section,
The bubble supply means includes
The water reservoir has an air inlet for introducing air into portion, the by the swirling flow introducing air from the air inlet to the water reservoir portion, the time elapsed while maintaining a state where the air communication with the air inlet In addition, when the bubble is grown to a predetermined size, the bubble is separated from the air inlet and intermittently supplied as a large bubble to the water flow path portion. A first water flow state through which the jet passes and a second water flow state through which the jet flows through the stored water are alternately generated repeatedly, and the water flow resistance of the jet in the water flow path portion is changed. And
Furthermore, before having a deceleration unit for decelerating the Ki旋 circumfluence, wherein the speed reduction unit, prevents the air introduced into the water reservoir portion from the air inlet by the swirling flow is cut off before it the large bubbles Therefore, it is arranged at the discharge port side corner formed on the discharge port side of the water reservoir,
Said air inlet, said disposed on the injection port side corner portion formed on the injection port side of the water reservoir water discharge device, characterized in Tei Rukoto. The water reservoir chamber includes a first wall surface constituting an inner wall surface on which a water reservoir chamber side opening connected to the discharge port is formed on one side, and a second wall surface constituting an inner wall surface formed on the one side. A third wall surface connecting the other side of the first wall surface and the other side of the second wall surface,
2. The water discharge device according to claim 1, wherein the speed reduction portion is configured to be joined so as to form a bent surface in which the first wall surface and the third wall surface are not smoothly connected. . The speed reduction part has a secondary water inlet for introducing a secondary water stream having a slower flow velocity than the jet into the water reservoir,
The water discharge device according to claim 2, wherein the auxiliary water flow inlet is provided in the vicinity of the bent surface.   The water discharge device according to claim 1, wherein the vicinity of the speed reduction portion and the vicinity of the air introduction port are connected by a smooth continuous surface.