JP2013047450A - Water discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water discharge device capable of giving a sufficiently great flow rate variation to discharged water without using a large pump, to form sufficiently large water masses in spite of a short water discharging-landing distance.SOLUTION: The water discharge device produces great bubbles BA each having a cross section larger than the flow path cross section of an injection port 10b in view from the injection port 10b into a water reservoir chamber 10. The water discharge device intermittently forms the great bubbles BA, so that the flow rate of a jet flow WSm is varied.

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 invention has been made in view of such problems, and its purpose is to provide a sufficiently large flow rate fluctuation to the water discharge without using a large pump, and when the distance from the water discharge to the water landing is short Even so, an object of the present invention is to provide a water discharging device capable of forming a sufficiently large water mass.

  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 ejection port that is jetted as an accelerated jet flow, a discharge channel that is provided on the downstream side of the jet port, and that is provided with a discharge port that discharges the jet to the outside, and the jet port and the discharge channel A water reservoir chamber having a water passage portion that is provided in between and a water passage portion that is a passage through which a jet flow from the injection port to the discharge passage passes, and a water reservoir portion that is adjacent to the water passage passage portion to form the water reservoir; And air supply means for supplying air to the water flow path section. The air supply means in the present invention supplies the air so as to cover the periphery of the jet flow, thereby suppressing the supply of the air and the first water flow state in which the jet flows through the air. A second water flow state in which the jet passes through the accumulated water is repeatedly generated alternately. The water discharge device according to the present invention varies the water flow resistance of the jet flow in the water flow path portion by supplying and suppressing air by the air supply means.

  According to the present invention, the air supply means forms the first water flow state in which the jet flows through the air by supplying the air to the water passage section so that the air covers the periphery of the jet. Can do. The air supply means can form a second water flow state in which the jet passes through the water by suppressing the supply of air to the water flow path portion. Since the air supply means alternately supplies and suppresses air to the water flow path portion, the first water flow state and the second water flow state can be alternately and repeatedly generated. In the first water flow state, since the jet penetrates through the air, there is a lot of air around the jet, and the resistance to decelerate the jet is small, and the jet velocity is maintained toward the discharge port while maintaining the velocity. On the other hand, in the second water flow state, since the jet passes through the water, the periphery of the jet is surrounded by water, and the resistance to decelerate the jet is large, and the jet flow decreases toward the discharge port. Therefore, by alternately and repeatedly generating the first water flow state and the second water flow state, the water flow resistance of the jet flow in the water flow path portion is changed. Due to the fluctuation of the water flow resistance, the speed of the jet flow toward the discharge port can be greatly changed to give a large flow velocity fluctuation to the water discharge, and a sufficiently large water mass even when the distance from the water discharge to the water landing is short Can be formed.

  Moreover, in the water discharging apparatus which concerns on this invention, the said air supply means is provided in the said water reservoir part, and the air introduction port which attracts | sucks air with the negative pressure which generate | occur | produces with the passage of the said jet, and rocks the said jet A first oscillating mechanism that fills the water reservoir chamber with air by supplying substantially all of the jet directly to the discharge flow path, and a jet oscillating mechanism; It is also preferable that the second water flow state in which the water reservoir chamber is filled with water is alternately and repeatedly generated by not directly supplying at least a part of the jet flow to the discharge passage.

  In this preferred embodiment, the first water flow state and the second water flow state are alternately arranged by combining negative suction of air by the action of the jet and providing a jet rocking mechanism for rocking the jet. Can be repeatedly generated.

  Specifically, first, substantially all of the jet flow proceeds in a direction in which the jet flow is directly supplied to the discharge flow path, so that the negative pressure suction action of the jet flow greatly acts and air is supplied from the air introduction port to the water reservoir chamber. A first water flow state is formed in which the air is filled with air.

  Subsequently, when the jet flow is oscillated by the jet oscillating mechanism and the traveling direction of the jet deviates from the direction toward the discharge channel, the jet proceeds in a direction in which at least a part of the jet is not directly supplied to the discharge channel. In this case, at least part of the jet flows against the wall surface of the water reservoir chamber, and a second water flow state is formed in which the water reservoir chamber is filled with water.

  In the formation of the second water flow state, the increase in the internal pressure of the water reservoir chamber due to the increase in the amount of water stored in the water reservoir chamber regulates the introduction of air from the air inlet and the air remaining in the water reservoir chamber. By pushing out from the air inlet, it is further promoted that water accumulates in the water reservoir. Further, the air in the water reservoir chamber is drawn by the suction negative pressure generated with the progress of the jet flow, and the air in the water reservoir chamber is discharged to the discharge flow channel side as the jet flows to the discharge flow channel. It promotes more water accumulation.

  Subsequently, when the jet flow is further oscillated by the jet oscillating mechanism, a state is reached in which substantially all of the jet flow is directly supplied to the discharge flow path. When the jet proceeds in this way, the negative pressure suction action of the jet is greatly activated, and the water in the water reservoir chamber is discharged to the discharge flow path. By this negative pressure suction action, air is supplied from the air inlet into the water reservoir chamber, and a first water flow state is formed in which the water reservoir chamber is filled with air.

  Moreover, in the water discharging apparatus which concerns on this invention, the said jet flow rocking | fluctuation mechanism is the time which supplies at least one part of the said jet flow to the said discharge flow path directly for the time which supplies substantially all of the said jet flow to the said discharge flow channel directly. It is also preferable to ensure a longer time.

  The present inventors pay attention to the viscosity of water and air, and the time required to change the state of the water reservoir chamber from the state filled with air to the state filled with water, and the state where the water reservoir chamber is filled with water from the state filled with water. It was found that the latter requires more time than the former when compared with the time required to achieve the above. This preferred aspect is based on that knowledge, and by securing the time for supplying substantially all of the jet directly to the discharge flow path longer than the time for not supplying at least a part of the jet directly to the discharge flow path, It is possible to reliably create a state where the water reservoir is filled with air.

  Further, in the water discharge device according to the present invention, the jet rocking mechanism generates water only on a side opposite to the air introduction port across the jet of the water reservoir chamber when generating a state in which the water reservoir chamber is filled with water. It is also preferable to supply

  In this preferred embodiment, since water is supplied to the water reservoir chamber on the opposite side of the air inlet with the jet flow interposed therebetween, the distance from the supplied water to the air inlet can be secured, and the water reservoir chamber is filled with water. Even so, the water can be prevented from being discharged from the air inlet to the outside, and the water reservoir can be filled with water more quickly.

  Moreover, in the water discharging apparatus which concerns on this invention, it is also preferable that the said air inlet is formed so that it may open to the upper side in a perpendicular direction.

  In this preferred embodiment, the air inlet is formed so as to open upward in the vertical direction, so that the supplied water can be prevented from flowing into the air inlet by the action of gravity, and the water reservoir chamber is filled with water. Even if it exists, it can suppress that water is discharged | emitted from the air introduction port outside, and can fill a water reservoir chamber with water earlier.

  Moreover, in the water discharging apparatus which concerns on this invention, it is also preferable that the said air inlet is provided in the upstream in the advancing direction of the said jet.

  In this preferred embodiment, since the air introduction port is formed on the upstream side in the traveling direction of the jet, the air introduced from the air introduction port can fill the water reservoir chamber along the flow without opposing the flow of the jet. . Therefore, it is possible to fill the water reservoir chamber with air faster by using the flow of the jet.

  According to the present invention, a sufficiently large flow rate fluctuation can be given to water discharge without using a large pump, and a sufficiently large water mass can be formed even when the distance from water discharge to water landing is short. A possible water discharge device can be provided.

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 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 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 modification of the system which grows a bubble in a water reservoir chamber. It is a figure which shows the modification of the system which grows a bubble in a water reservoir chamber. It is a figure which shows the modification of the system which grows a bubble in a water reservoir chamber. It is a figure which shows typically schematic structure of the water reservoir chamber which concerns on the modification of this embodiment. It is a figure for demonstrating the rocking | fluctuation mechanism of FIG. It is a figure for demonstrating rocking | fluctuation of the jet flow in FIG. 23, and the water flow state accompanying it.

  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.

  FIG. 2 schematically shows the water discharge state of the local cleaning device WA shown in FIG. In this embodiment, without using a large-sized pump, the initial speed of the water discharged is changed periodically, and it is comprised so that a big water mass may collide with a water discharge object site | part.

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

  Therefore, since the speed of the part Wp3 is higher than the part Wp2 as it moves from (A) to (C) in FIG. 2 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. 3 is a diagram schematically showing a schematic configuration of the water storage chamber 10.

  As shown in FIG. 3, 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 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 first water supply pipe line 102 communicates with the inside of the water reservoir chamber 10 through the injection port 10b. The discharge pipe line 103 communicates with the inside of the water reservoir chamber 10 through the water reservoir chamber side opening 10c. The second water supply conduit 104 communicates with the interior of the water reservoir 10 via the auxiliary water flow inlet 10d.

  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.

  FIG. 4 shows the AA cross section of FIG. 3, and FIG. 5 shows the BB cross section of FIG. In the state shown in FIG. 3, 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. 4. The jet WSm that reaches the water reservoir chamber side opening 10c enters the discharge pipe 103, and proceeds in a state of being in contact with the inner wall surface of the discharge pipe 103 as shown in FIG.

  In the state shown in FIG. 3, the bubble BA is small. When time further advances from the state shown in FIG. 3, bubbles BA grow as shown in FIG. The bubble BA grows until its lower end approaches the jet WSm. Therefore, the region where 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. 7 shows a CC cross section of FIG. 6, and FIG. 8 shows a region D of FIG.

  As shown in FIG. 7, the bubble BA grows in contact with three of the four walls extending from the air introduction port 10a of the water reservoir chamber 10 toward the injection port 10b. 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. 8, buoyancy acts on the grown bubble BA 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. Therefore, the bubble BA can maintain the state which contacted three walls of the four walls extended toward the injection port 10b from the air introduction port 10a of the water reservoir chamber 10. FIG.

  When the time further advances from the state shown in FIG. 6, the 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. 9, the bubble BA is completely drawn into the jet WSm as shown in FIG. 10, and the bubble BA exists over substantially the entire area of the water flow path portion 105. FIG. 11 shows a region F in FIG. 10, and FIG. 12 shows a cross section taken along line EE in FIG.

  As shown in (A) of FIG. 11, the bubbles BA exist over substantially the entire area of the water flow path portion 105, and thus exist up to the vicinity of the injection port 10 b. 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. 11B, there is a lot of water in the vicinity of the injection port 10b, and a lot of vortex is generated. Since the generation of the vortex becomes resistance to the progression of the jet WSm, the vortex is suppressed as shown in FIG. 11A, and the jet WSm can be directed toward the discharge port NZa without reducing the speed.

  As shown in FIG. 12, the jet WSm passes through 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. 12 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. 10, as shown in FIG. 13, the bubble BA moves toward the discharge pipe 103 so as to be drawn into the jet WSm. 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. 13, the bubble BA enters the discharge pipe 103 as shown in FIG. 14. FIG. 15 shows a GG cross section of FIG. As shown in FIG. 15, 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. 14, 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 as described with reference to FIGS. 3 to 15 is periodically repeated.

  FIG. 16 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. 16A is a photograph of a state where the jet WSm travels in the pooled water PW and the bubble BA is growing, and corresponds to the state of FIG. FIG. 16B is a photograph of a state in which the jet WSm is traveling in the bubble BA, and corresponds to the state of FIG. FIG. 16C is a photograph of a state in which the jet WSm is traveling in the bubble BA, and corresponds to the state of 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. 12). By forming the large bubbles BA intermittently, a first water flow state (see FIG. 10) in which the jet WSm passes through the large bubbles BA and a second water flow state in which the jet WSm passes through the water. (Refer to FIGS. 3 and 6) are repeatedly generated alternately, and the water flow resistance of the jet WSm in the water flow path portion 105 is changed.

  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.

  Moreover, in this embodiment, a bubble supply means supplies large bubble BA so that the injection port 10b may be covered (refer FIG. 11). 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. 7).

  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. 15) 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. 5) 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. 3 and 6) that forms a relatively low flow sub-water flow WSs in the water reservoir chamber 10 that can maintain a state in which the bubbles BA communicate with each other, and is introduced from the air introduction port 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 A reference), 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. 6 and 7).

  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. 6 and 8).

  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. 8).

  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. 7). 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. 13). 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, A first state (see FIG. 6) in which the volume of water in the water reservoir 106 is relatively reduced by increasing the bubble BA as a retained bubble, and the water in the water reservoir 106 by reducing the bubble BA as a retained bubble. By alternately and repeatedly generating a second state (see FIG. 3) in which the capacity of the water reservoir is relatively increased, the pressure in the water reservoir chamber 10 is varied.

  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. 17 is a view showing a water reservoir chamber 10L as a modified example in which the auxiliary water flow WSs is formed in the water reservoir chamber 10. FIG. 18 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. 18A, when the bubble BA is small, the pressure in the water reservoir chamber 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. 18 (B), when the bubble BA increases, the pressure in the water reservoir 10L increases, the partial flow rate WSd decreases, and the secondary water flow WSs decreases.

  FIG. 19 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.

  In the embodiment described above, an example in which the bubble BA is a large bubble grown has been described. However, it is also a preferable aspect that the large bubble is formed by combining small bubbles. This preferred embodiment will be described with reference to FIGS.

  FIG. 20 shows a schematic configuration of a water reservoir chamber 10N as an example in which small bubbles are collected by buoyancy to form large bubbles. As shown in FIG. 20A, the water reservoir 10N includes an air pipe 101N, a first water supply pipe 102, a discharge pipe 103, and a second water supply pipe 104. The air pipe 101 </ b> N, 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 air duct 101N communicates with the interior of the water reservoir 10 through an air inlet 10aN formed in the water reservoir 10.

  The air conduit 101N is a conduit that connects the air inlet 10aN and the opening that is open to the atmosphere. Air introduced from the air duct 101N is drawn into the water reservoir 10N through the air inlet 10aN. The air drawn into the water reservoir 10N forms small bubbles BAs.

  In the case of the present embodiment, the ejection port 10b and the water reservoir chamber side opening 10c are disposed close to one side of the rectangular water reservoir chamber 10N. On the other hand, the air inlet 10aN and the sub-water flow inlet 10d are disposed close to the other side of the rectangular water reservoir 10. Therefore, the injection port 10b and the water reservoir chamber side opening 10c, the air introduction port 10aN, and the auxiliary water flow introduction port 10d are spaced apart. Further, the air inlet 10aN and the auxiliary water flow inlet 10d are arranged close to each other. Accordingly, the small bubbles BAs supplied from the air introduction port 10aN are conveyed by the sub-water flow WSs supplied from the sub-water flow introduction port 10d.

  Further, the water reservoir chamber 10N is provided with a bubble holding recess 107N (bubble holding portion) and a bubble holding protrusion 108N (bubble holding portion). The bubble holding recess 107N is formed on the same wall surface as the air inlet 10aN, and is formed as a recess recessed from the wall surface. The bubble holding protrusion 108N is a protrusion formed on the wall surface facing the wall surface where the sub-water flow inlet 10d is formed and formed below the bubble holding recess 107N.

  The small bubbles BAs introduced from the air introduction port 10aN are transported by the secondary water flow WSs and are separated from the secondary water flow WSs by buoyancy. Since the bubble holding recess 107N and the bubble holding protrusion 108N are formed at the separation point, the small bubbles BAs gather to form the middle bubble BAm (see FIG. 20B).

  When the small bubbles BAs gather further from the state of FIG. 20B, they become large bubbles BAn and overflow from the space surrounded by the bubble holding recess 107N and the bubble holding protrusion 108N (see FIG. 20C). . The large bubbles BAn overflowing from the space surrounded by the bubble holding recess 107N and the bubble holding projection 108N ride on the flow of the sub-water flow WSs toward the jet WSm (see FIG. 20D).

  Next, FIG. 21 shows a schematic configuration of a water reservoir chamber 10P as an example in which small bubbles are collected by centrifugation to form large bubbles. As shown in FIG. 21A, the water reservoir 10P includes an air pipe 101N, a first water supply pipe 102, a discharge pipe 103, and a second water supply pipe 104. The air pipe 101 </ b> N, 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 air duct 101N communicates with the interior of the water reservoir 10 through an air inlet 10aN formed in the water reservoir 10.

  The air conduit 101N is a conduit that connects the air inlet 10aN and the opening that is open to the atmosphere. Air introduced from the air duct 101N is drawn into the water reservoir 10N through the air inlet 10aN. The air drawn into the water reservoir 10N forms small bubbles BAs.

  In the case of the present embodiment, the ejection port 10b and the water reservoir chamber side opening 10c are disposed close to one side of the rectangular water reservoir chamber 10N. On the other hand, the air inlet 10aN and the sub-water flow inlet 10d are disposed close to the other side of the rectangular water reservoir 10. Therefore, the injection port 10b and the water reservoir chamber side opening 10c, the air introduction port 10aN, and the auxiliary water flow introduction port 10d are spaced apart. Further, the air inlet 10aN and the auxiliary water flow inlet 10d are arranged close to each other. Accordingly, the small bubbles BAs supplied from the air introduction port 10aN are conveyed by the sub-water flow WSs supplied from the sub-water flow introduction port 10d.

  Furthermore, the water retention chamber 10P is provided with a bubble holding ridge 107P (bubble retention portion). The bubble holding collar 107P is provided near the center of the water reservoir 10P. The bubble holding collar portion 107P includes a high wall portion 107Pa provided on the air introduction port 10aN and the side water flow introduction port 10d side, and a low wall portion disposed opposite to the high wall portion 107Pa and having a lower height than the high wall portion 107Pa. 107Pb and a bottom wall portion 107Pc connecting the high wall portion 107Pa and the low wall portion 107Pb.

  The small bubbles BAs introduced from the air introduction port 10aN are transported by the sub-water flow WSs and are centrifuged by the flow of the sub-water flow WSs, which is a swirling flow, and the light small bubbles BAs are separated from the sub-water flow WSs and gather at the swirling center. . Since the bubble holding collar 107P is formed at this aggregation point, the small bubbles BAs gather to form the middle bubble BAm (see FIG. 21B).

  When the small bubbles BAs gather further from the state of FIG. 21B, they become large bubbles BAn and overflow from the space surrounded by the bubble holding collar 107P (see FIG. 21C). The large bubble BAn overflowing from the bubble holding collar 107P rides on the flow of the sub-water flow WSs toward the jet WSm.

  Next, FIG. 22 shows a schematic configuration of the water reservoir 10Q as an example in which small bubbles are collected by hooking to form large bubbles. As shown in (A) of FIG. 22, the water reservoir 10 </ b> Q includes an air pipe 101, a first water supply pipe 102, 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 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 10Q from the air inlet 10a. The air drawn into the water reservoir 10Q forms small bubbles BAs.

  In the case of the present embodiment, the ejection port 10b and the water reservoir chamber side opening 10c are disposed close to one side of the rectangular water reservoir chamber 10N. 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. The small bubbles BAs supplied from the air introduction port 10a descend while being conveyed by the sub-water flow WSs supplied from the sub-water flow introduction port 10d.

  Further, the water reservoir chamber 10Q is provided with a bubble holding recess 107Q (bubble holding portion) and a bubble holding protrusion 108Q (bubble holding portion). The bubble holding recess 107Q is formed as a recess that is formed below the air inlet 10a, on the wall facing the wall on which the auxiliary water flow inlet 10d is formed, and recessed from the wall. The bubble holding protrusion 108Q is a protrusion that is formed on the wall surface facing the wall surface where the auxiliary water flow inlet 10d is formed, and is formed below the bubble holding recess 107Q.

  The small bubbles BAs introduced from the air inlet 10a are transported by the auxiliary water flow WSs and are caught by the bubble holding protrusions 108Q. By hooking in this way, small bubbles BAs gather to form medium bubbles BAm (see FIG. 22B).

  When the small bubbles BAs gather further from the state of FIG. 22B, they become large bubbles BAn and overflow from the space surrounded by the bubble holding recess 107Q and the bubble holding projection 108Q (see FIG. 22C). . The large bubble BAn overflowing from the space surrounded by the bubble holding recess 107Q and the bubble holding projection 108Q rides on the flow of the sub-water flow WSs toward the jet WSm (see FIG. 22D).

  In the water reservoir chambers 10N, 10P, and 10Q according to the modification described with reference to FIGS. 20 to 22, the air introduced into the water reservoir chambers 10N, 10P, and 10Q from the air inlets 10a, 10aN into a bubble shape over time. It has a bubble retention part (bubble holding recesses 107N and 107Q, bubble holding protrusions 108N and 108Q, bubble holding collar part 107P) that grows large, and water is passed as a large bubble BAn when the bubbles reach a predetermined size. A plurality of small bubbles BAs, which are supplied to the path portion and formed by the air introduced from the air inlets 10a and 10aN, are temporarily retained in the bubble retaining portion, and the plurality of small bubbles temporarily retained The first state where BAs are combined to form a large bubble BAn, and a plurality of small bubbles BAs are combined to reach a predetermined size, and then the large bubble BAn is passed through the bubble retaining portion as a water passage. And a second state for supplying the parts, thereby repeatedly generating alternately.

  According to such a configuration, in the first state, the plurality of small bubbles BAs formed by the air introduced from the air inlets 10a and 10aN are temporarily retained in the bubble retaining portion, and the plurality of temporarily retained plural bubbles. Since the small bubbles BAs are combined, the small bubbles BAs formed by the air introduced from the air inlets 10a and 10aN can be gathered and grown. On the other hand, in the second state, when a plurality of small bubbles BAs are combined and become a predetermined size, large bubbles BAn are supplied from the bubble retaining portion to the water passage portion as the large bubbles BAn. Bubbles BAn can be supplied to the water passage. By alternately and repeatedly generating such a first state and a second state, a period in which the large bubbles BAn are not supplied to the jet WSm and a period in which the large bubbles BAn are supplied to the jet WSm are alternately generated repeatedly. be able to. During the period in which the large bubbles BAn are 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 a period in which the large bubbles BAn are not supplied to the jet flow WSm, the jet flow WSm moves toward the discharge port NZa while the speed of the jet flow WSm decreases. 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.

  Moreover, in this modification, the bubble supply means forms a plurality of small bubbles BAs formed by the air introduced from the air inlets 10a, 10aN in the water reservoirs 10N, 10P, 10Q as a flow different from the jet WSm. There is a bubble separation means for separating the secondary water stream WSs and guiding it to the bubble retention part.

  Even if the sub-water flow WSs formed in the water reservoir chambers 10N, 10P, and 10Q as a flow different from the jet flow WSm is brought close to the jet flow WSm if it approaches the jet flow WSm while flowing in the water reservoir chamber. . Therefore, in a state where the sub-water stream WSs includes a plurality of small bubbles BAs, the plurality of small bubbles BAs cannot be collected and grown. Therefore, since the bubble separating means for separating the plurality of small bubbles BAs from the sub-water stream WSs is provided, the plurality of small bubbles BAs can be separated from the sub-water stream WSs and reliably grown.

  Further, in the present modification, the bubble supply means uses the stationary water flow as a flow different from the jet flow WSm and the secondary water flow WSs so that the plurality of small bubbles BAs separated from the secondary water flow WSs by the bubble separation means remain in the bubble retention portion. It is formed in the bubble retention part.

  As described above, since the stationary water flow is formed as an independent flow different from the jet flow WSm and the sub-water flow WSs in the bubble retention portion, by including the small bubbles BAs in the stationary water flow, the influence of the jet WSm and the sub-water flow WSs. And the small bubbles BAs can remain in the bubble retaining portion.

  Further, in this modification, the bubble supply means causes the bubble retaining portion to overflow when a plurality of small bubbles BAs temporarily retained in the bubble retaining portion are combined into a large bubble BAn of a predetermined size. Is supplied to the water passage.

  As described above, the plurality of small bubbles BAs collected in the bubble retaining portion can be combined and become a predetermined size, and the plurality of small bubbles collected can be retained in the bubble retaining portion. When the bubbles BAs are combined into a large bubble BAn of a predetermined size, the large bubble BAn can be supplied to the water passage portion by overflowing from the bubble retention portion. Therefore, the first state and the second state can be switched using the bubble overflow phenomenon from the bubble retaining portion.

  Further, in the water reservoir chamber 10N described with reference to FIG. 20, the bubble separation means separates the plurality of small bubbles BAs from the sub-water stream WSs by buoyancy acting on the plurality of small bubbles BAs, and serves as a bubble retention unit. The bubble holding recess 107N and the bubble holding projection 108N are provided adjacent to the upper wall of the water reservoir.

  As described above, since the plurality of small bubbles BAs are separated from the sub-water stream WSs using the naturally generated force called buoyancy acting on the plurality of small bubbles BAs, the bubbles can be separated with a simple configuration. In addition, since the bubble retaining portion is provided adjacent to the upper wall, it is possible to collect bubbles using the phenomenon that bubbles separated by buoyancy rise to the maximum.

  Further, in the water reservoir chamber 10P described with reference to FIG. 21, the bubble separation means separates the plurality of small bubbles BAs by the centrifugal force generated by turning the sub-water flow WSs, and is a bubble retention part. The bubble holding collar 107P is provided in the vicinity of the turning center on the inner side of the trajectory around which the sub-water flow WSs turns.

  As described above, the small bubbles BAs are separated by the centrifugal force generated as a result of the swirling of the sub-water stream WSs, and the small bubbles BAs are collected and grown by the bubble holding collar 107P that is the bubble retaining portion provided in the vicinity of the swirling center. Therefore, the small bubbles BAs can be separated from the auxiliary water stream WSs and collected by a simple method of swirling the auxiliary water stream WSs.

  In the above-described embodiment, the first water flow state and the second water flow state are alternately generated by supplying large bubbles. However, it is possible to alternately generate the first water flow state and the second water flow state without supplying large bubbles. The modification will be described with reference to FIGS. 23, 24, and 25. FIG. FIG. 28 is a view showing a water reservoir 10T provided with this modification.

  As shown in FIG. 23, the water reservoir 10T includes an air pipe 101T, a water supply pipe 102T (water supply pipe), and a discharge pipe 103T. The air pipe 101T, the water supply pipe 102T, and the discharge pipe 103T are pipes provided so as to communicate with the inside of the water reservoir chamber 10T.

  The water reservoir 10T has a substantially rectangular parallelepiped box shape as a whole. The water reservoir 10T has a wall 10eT, a wall 10fT, a wall 10gT, a wall 10hT, a wall 10iT (not shown in the figure), and a wall 10jT (not shown in the figure). In FIG. 23, only the wall 10eT, the wall 10fT, the wall 10gT, and the wall 10hT are drawn so as to form a rectangle. The wall 10iT and the wall 10jT are walls disposed at positions facing each other, and are walls disposed so as to connect the wall 10eT, the wall 10fT, the wall 10gT, and the wall 10hT.

  The air duct 101T communicates with the interior of the water reservoir 10T via an air inlet 10aT formed in the water reservoir 10T. The air introduction port 101T is formed at the upstream end of the wall 10gT, in the vicinity of the corner where the wall 10gT and the wall 10fT face each other. Accordingly, the air inlet 10aT is formed so as to open upward in the vertical direction. The air inlet 10aT is provided on the upstream side in the traveling direction of the jet flow WSm.

  The water supply conduit 102T communicates with the inside of the water reservoir 10T through the injection port 10bT. The injection port 10bT is formed near the center of the wall 10bT. An enlarged diameter portion 102aT is provided on the upstream side of the water supply conduit 102T.

  The enlarged diameter portion 102aT is provided with a swinging mechanism portion 102aTa on one side of the water supply conduit 102T. In the oscillating mechanism 102aTa, a vortex is generated by the passage of the jet WSm. In this modification, the traveling direction of the jet WSm ejected from the ejection port 10bT is periodically changed using the principle of the fluid element.

  A mechanism by which the traveling direction of the jet WSm is periodically changed by the swing mechanism 102aTa will be described with reference to FIG. FIG. 24 is a diagram for explaining the operation of the swing mechanism 102aTa.

  In the state shown in FIG. 24 (A), the jet WSm flows directly into the water supply conduit 102T. A vortex resulting from the flow of the jet WSm is generated in the oscillating mechanism 102aTa, and a negative pressure is generated by the vortex. Subsequently, in the state shown in FIG. 24B, the jet flow WSm is pulled toward the swing mechanism portion 102aTa by the negative pressure generated in the swing mechanism portion 102aTa, and the traveling direction of the jet flow WSm is downward in the figure. Change. When the state shown in FIG. 24B continues, as shown in FIG. 24C, a part of the jet WSm flows into the swing mechanism portion 102aTa, and the internal pressure of the swing mechanism portion 102aTa increases. When the internal pressure of the oscillating mechanism 102aTa increases, the force attracting the jet WSm decreases, and as shown in FIG. 24D, the jet WSm directly flows out to the water supply pipe line 102T. ) To return to the state described above.

  Returning to FIG. 23, the description will be continued. The discharge pipe line 103T communicates with the inside of the water reservoir chamber 10T through the water reservoir chamber side opening 10cT. The water reservoir chamber side opening 10cT is formed near the center of the wall 10hT.

  The air duct 101T is a duct that connects the air inlet 10aT and the opening that is open to the atmosphere. Air introduced from the air duct 101T is drawn into the water reservoir 10T from the air inlet 10aT.

  The water supply pipe line 102T is a pipe line that connects the injection port 10bT and a water supply source. The water supply pipe line 102T is reduced in diameter in the middle of the pipe line or at the injection port 10bT. Accordingly, the speed of the water supplied from the water supply pipe line 102T is increased, and the water is jetted into the water reservoir 10T as the jet WSm.

  The discharge pipe 103T is a pipe that connects the water reservoir chamber side opening 10cT and the discharge port NZa formed in the nozzle NZ (see FIG. 1). In the case of the present embodiment, the injection port 10bT and the water reservoir chamber side opening 10Tc are disposed to face each other. Therefore, the jet WSm injected from the injection port 10bT into the water reservoir 10T travels along the J axis in the water reservoir 10T, and enters the discharge conduit 103T from the water reservoir chamber side opening 10cT. The water that has entered the discharge pipe 103T travels in the discharge pipe 103T along the J axis and is discharged to the outside from the discharge port NZa.

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

  The remaining area excluding the water flow path portion 105T in the water reservoir chamber 10T is a water reservoir portion 106T. In the case of this modification, the water reservoir 106T is formed so as to surround the water flow path portion 105T.

  Next, a water flow state when the jet WSm oscillates will be described with reference to FIG. As shown in FIG. 25A, when the jet flow WSm injected from the injection port 10bT goes straight, it enters the discharge pipe 103T through the water reservoir chamber side opening 10cT as it is. In this case, there is no water in the region other than the jet WSm in the water reservoir 10T, and the jet WSm travels in the air.

  As shown in FIG. 25 (B), when the negative pressure of the swinging mechanism portion 102aTa increases (see FIG. 24 (B)), the jet WSm is drawn toward the wall 10gT, and the wall 10hT approaches the wall 10hT. Part hits. When a part of the jet WSm hits the wall 10hT on the wall 10eT side, the hit water flows backward to the upstream side. As shown in FIG. 25C, the water reservoir 10T is filled with water, and the jet WSm travels in the water.

  As shown in (D) of FIG. 25, when the negative pressure of the swinging mechanism portion 102aTa is reduced (see (D) of FIG. 24), the jet WSm is drawn toward the wall 10gT and discharged from the water reservoir chamber side opening 10cT as it is. Enter the pipeline 103T. The water in the water reservoir 10T is attracted in the traveling direction of the jet WSm and discharged from the water reservoir chamber side opening 10cT to the outside of the water reservoir 10T. As shown in FIG. 25E, the jet WSm is slightly swung to the wall 10gT side due to the inertial force, and the water on the wall 10eT side is surely discharged to the outside of the water reservoir 10T, and the air from the air inlet 10aT is discharged. Promote adoption. The first water flow state and the second water flow state can be alternately generated by the swinging of the jet flow WSm described above in the traveling direction.

  By this modification, an air supply means for supplying air to the water flow path portion 105T is realized. The air supply means supplies the air so as to cover the periphery of the jet WSm, the first water flow state in which the jet penetrates through the air, and the jet WSm in the accumulated water by suppressing the supply of air. The passing second water flow state is repeatedly generated alternately. The water discharge device according to the present variation varies the water flow resistance of the jet flow WSm in the water flow path portion 105T by supplying and suppressing air by the air supply means.

  By supplying the air to the water passage section 105T so that the air covers the circumference of the jet WSm, a first water flow state in which the jet passes through the air can be formed. The air supply means can form a second water flow state in which the jet passes through the water by suppressing the supply of air to the water flow path portion 105T. Since the air supply means alternately supplies and suppresses air to the water flow path portion 105T, the first water flow state and the second water flow state can be alternately and repeatedly generated. In the first water flow state, since the jet WSm penetrates through the air, there is a lot of air around the jet WSm, the resistance to decelerate the jet WSm is small, and the speed of the jet WSm is maintained at the discharge port. Head. 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 large, and the jet WSm moves toward the discharge port while the speed of the jet WSm decreases. Therefore, the water flow resistance of the jet WSm in the water flow path portion 105T is changed by repeatedly generating the first water flow state and the second water flow state alternately. Due to the fluctuation of the water flow resistance, the velocity of the jet WSm toward the discharge port can be greatly changed to give a large flow velocity 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.

  In the present modification, the air supply means is provided in the water reservoir 106T, and the air introduction port 10aT that sucks air by the negative pressure generated along with the passage of the jet flow WSm, and the jet flow swing that swings the jet flow WSm. And a jet rocking portion 102aTa which is a mechanism. The jet oscillating portion 102aTa discharges at least a part of the jet flow WSm and the first water flow state in which the water reservoir chamber 10T is filled with air by supplying substantially all of the jet flow WSm directly to the discharge conduit 103T (discharge flow channel). By not directly supplying the pipe 103T, the second water flow state in which the water reservoir 10T is filled with water is repeatedly generated alternately.

  In this modification, the first water flow state and the second water flow state are obtained by combining suction of air by the action of the jet WSm and the provision of the jet rocking portion 102aTa that rocks the jet WSm. Can be repeatedly generated alternately.

  Specifically, first, substantially all of the jet flow WSm travels in a direction in which it is directly supplied to the discharge pipe 103T, so that the negative pressure suction action of the jet flow WSm works greatly, and air enters the water reservoir chamber 106T from the air introduction port 10aT. To form a first water flow state in which the water reservoir chamber 106T is filled with air.

  Subsequently, the jet WSm is oscillated by the jet oscillating portion 102aTa, and when the traveling direction of the jet WSm deviates from the direction toward the discharge pipe 103T, at least a part of the jet WSm is not supplied directly to the discharge pipe 103T. The jet WSm advances. In this case, at least a part of the jet WSm hits the wall surface of the water reservoir 10T, and a second water flow state is formed that fills the water reservoir 10T with water.

  In forming the second water flow state, an increase in the internal pressure of the water reservoir chamber 10T due to an increase in the amount of water stored in the water reservoir chamber 10T regulates the introduction of air from the air introduction port 10aT and enters the water reservoir chamber 10T. By pushing out the remaining air from the air inlet 10aT, it is further promoted that water accumulates in the water reservoir 10T. Further, the air in the water reservoir chamber 10T is drawn by the suction negative pressure generated as the jet flow WSm progresses, and the air in the water reservoir chamber 10T moves toward the discharge conduit 103T side as the jet flow WSm progresses to the discharge conduit 103T. As a result, the water is further promoted to be accumulated in the water reservoir 10T.

  Subsequently, when the jet flow WSm is further oscillated by the jet oscillating portion 102aTa, a state is reached in which substantially all of the jet flow WSm proceeds in a direction directly supplied to the discharge pipe 103T. When the jet flow WSm advances in this way, the negative pressure suction action of the jet flow WSm works greatly, and the water in the water reservoir chamber 10T is discharged to the discharge conduit 103T. By this negative pressure suction action, air is supplied from the air inlet 10aT into the water reservoir chamber 10T, and a first water flow state is formed in which the water reservoir chamber 10T is filled with air.

  The jet oscillating portion 102aTa is configured to ensure that the time for supplying substantially all of the jet WSm directly to the discharge conduit 103T is longer than the time for supplying at least a part of the jet WSm directly to the discharge conduit 103T. Yes.

  The present inventors pay attention to the viscosity of water and air, and from the time required to change the state of the water reservoir 10T from the state filled with air to the state filled with water, and the state where the water reservoir 10T is filled with water. When comparing the time required for air filling, it was found that the latter requires more time than the former. This aspect is based on the knowledge, and the time for supplying almost all of the jet WSm directly to the discharge pipe 103T is secured longer than the time for supplying at least a part of the jet WSm directly to the discharge pipe 103T. Thus, a state where the water reservoir 10T is filled with air can be created more reliably.

  The jet rocking portion 102aTa supplies water only to the side opposite to the air inlet 10aT across the jet WSm of the water reservoir chamber 10T when generating a state in which the water reservoir chamber 10T is filled with water.

  Since water is supplied into the water reservoir 10T opposite to the air inlet 10aT across the jet WSm, a distance from the supplied water to the air inlet 10aT can be secured, and the water reservoir 10T is filled with water. Even if it is a case, it can suppress that water is discharged | emitted from the air inlet 10aT outside, and can fill the water reservoir 10T with water earlier.

  The air inlet 10aT is formed so as to open upward in the vertical direction.

  Since the air inlet 10aT is formed so as to open upward in the vertical direction, it is possible to prevent the supplied water from flowing into the air inlet 10aT by the action of gravity and to fill the water reservoir 10T with water. In addition, the water can be prevented from being discharged to the outside from the air inlet 10aT, and the water reservoir 10T can be filled with water more quickly.

  The air inlet 10aT is provided on the upstream side in the traveling direction of the jet flow WSm.

  Since the air introduction port 10aT is formed on the upstream side in the traveling direction of the jet flow WSm, the air introduced from the air introduction port 10aT does not oppose the flow of the jet flow WSm but can fill the water reservoir chamber 10T along the flow. it can. Therefore, the water reservoir chamber 10T can be filled with air more quickly by using the flow of the jet WSm.

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 (6)

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 channel provided on the downstream side of the injection port and provided with a discharge port for discharging the jet flow to the outside;
A water flow path portion that is provided between the jet port and the discharge flow path and through which a jet flow from the jet port to the discharge flow path passes, and water storage is formed adjacent to the water flow path portion. A water reservoir chamber having a water reservoir for performing,
Air supply means for supplying air to the water flow path section,
The air supply means supplies the air so as to cover the periphery of the jet flow, whereby the first water flow state in which the jet passes through the air, and the supply of the air by suppressing the supply of the air. And alternately generating a second water flow state through which the jet passes.
The water discharge device according to claim 1, wherein the water flow resistance of the jet flow in the water flow path portion is changed by supply and suppression of air by the air supply means. The air supply means includes
An air inlet that is provided in the water reservoir and sucks air by a negative pressure generated along with the passage of the jet;
A jet rocking mechanism for rocking the jet,
The jet oscillating mechanism supplies substantially all of the jet directly to the discharge flow path to fill the water reservoir chamber with air, and at least a part of the jet flow to the discharge flow path. The water discharge device according to claim 1, wherein the second water flow state in which the water storage chamber is filled with water is repeatedly generated alternately by not supplying directly.   The jet oscillating mechanism ensures that the time for supplying substantially all of the jet directly to the discharge flow path is longer than the time for supplying at least a part of the jet directly to the discharge flow path. The water discharging apparatus according to claim 2.   The jet oscillating mechanism supplies water only to a side opposite to the air introduction port across the jet of the water reservoir chamber when generating a state in which the water reservoir chamber is filled with water. The water discharging apparatus according to 2 or 3.   The water discharge device according to any one of claims 2 to 4, wherein the air introduction port is formed to open upward in a vertical line direction.   The water discharge device according to any one of claims 2 to 5, wherein the air introduction port is provided on an upstream side in the traveling direction of the jet.