JP2022045781A - Discharge device - Google Patents

Abstract

To provide a discharge device that can self-clean a jet passage.SOLUTION: A discharge device includes a jet passage 32a capable of jetting a jet flow, and a self-cleaning part 50 provided in the jet passage 32a, for self-cleaning the jet passage 32a by jetting a jet flow. As for liquid flowing in from an inlet flow passage 40 via a relay passage 34, the flow thereof is blocked by a first wall part 46, and split into a pair of intermediate flow channels 42A, 42B. Split liquids, either of which is changed into a jet flow generating fluctuation that have become stronger, are joined in a confluence chamber 44, and jetted from a jet hole 38a provided on a second wall part 48. Hereby, strength of each jet flow from the intermediate flow channels 42A, 42B is switched periodically, to thereby generate self-cleaning action by the self-cleaning part 50, and to enable self-cleaning of the jet passage.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a discharge device that injects a jet stream.

A discharge device that injects a jet may be incorporated into sanitary equipment such as bathroom equipment. In recent years, attempts have been made to diversify the stimuli that jets give to users. As an example of this, Patent Document 1 describes a discharge device that discharges wide water in the left-right direction from a water discharge port formed in a wide shape in the left-right direction.

Japanese Unexamined Patent Publication No. 2019-013515

As a result of proceeding with the study, the inventor of the present application has obtained the following new recognition. In the discharge device, moisture and human sebum may be nourished to generate stains such as biofilm in the flow path. The disclosed technology of Patent Document 1 was not devised from this point of view, and there was room for improvement.

One of the objects of the present disclosure is to provide a discharge device capable of self-cleaning the flow path.

The discharge device of the present disclosure includes an injection flow path capable of injecting a jet flow, and a self-cleaning unit provided in the injection flow path and self-cleaning the injection flow path by injecting the jet flow.

It is a block diagram which looked at the discharge system of 1st Embodiment from the side. It is a schematic front view which shows the discharge device of 1st Embodiment together with the peripheral structure. It is a side sectional view of the discharge device of 1st Embodiment. FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is a figure which shows the state which is injecting a motion jet. FIG. 3 is a cross-sectional view taken along the line BB of FIG. It is a figure which shows the 1st flow state. It is a figure which shows the 2nd flow state. It is a figure which shows the pressure distribution of the liquid in the jet flow path in the 1st flow state. It is a figure which shows the pressure distribution of the liquid in a jet flow path in a 2nd flow state.

Hereinafter, an example of the embodiment will be described. The same components are designated by the same reference numerals, and duplicate description will be omitted. In each drawing, for convenience of explanation, some of the components are omitted, enlarged, or reduced as appropriate. The drawings shall be viewed according to the orientation of the reference numerals.

(First Embodiment) Refer to FIGS. 1 and 2. The discharge device 10 is used for the sanitary equipment 12. The sanitary equipment 12 of the present embodiment is a bathroom equipment 14, and includes a bathtub 16. In addition to this, the bathroom facility 14 includes a bathroom wall, a washroom floor, and the like. The discharge device 10 is fixed to the bathtub 16. The bathtub 16 is an example of a tank body capable of receiving the jet flow J and the membranous flow Fd discharged from the discharge device 10.

The discharge device 10 is used in the discharge system 18. The discharge system 18 includes a storage tank 20 for storing the liquid W to be injected, a liquid supply passage 22 for supplying the liquid W from the storage tank 20 to the discharge device 10, and a pump 24 provided in the middle of the liquid supply passage 22. A control unit 26 for controlling the pump 24 is provided. The storage tank 20 of the present embodiment is a bathtub 16 that stores bathtub water as the liquid W to be sprayed. Under the control of the control unit 26, the pump 24 supplies the liquid W to the jet flow path 32a and the discharge flow path 32b of the discharge device 10 through the liquid supply passage 22 by pumping the liquid W sucked from the storage tank 20. do. The control unit 26 is a computer that combines hardware such as a CPU, ROM, and RAM with software.

The discharge device 10 of the present embodiment injects the moving jet J from the injection flow path 32a and discharges the membranous flow Fd from the discharge flow path 32b. The motion jet J and the membranous flow Fd can be applied to the body of the user 8, particularly the neck, shoulders, back and the like of the user 8 in a sitting position in the bathtub 16 from the back side. As a result, the massage effect can be given to the user 8.

The discharge device 10 includes a device main body 28. The apparatus main body 28 is attached to a wall-shaped base 30 provided in the sanitary equipment 12. The base 30 of the present embodiment is a flange portion constituting the peripheral edge portion of the upper end opening of the bathtub 16.

The discharge device 10 includes an injection flow path 32a and a discharge flow path 32b in which the liquid W is supplied from the liquid supply passage 22 in the device main body 28. The liquid W is supplied upward from the liquid supply passage 22 to the jet flow path 32a and the discharge flow path 32b of the present embodiment, respectively. An injection hole 38a is formed at the downstream end of the injection flow path 32a. A discharge hole 38b is formed at the downstream end of the discharge flow path 32b. In the present specification, the direction along the discharge direction of the discharge device 10 is referred to as the front-rear direction A (see FIG. 3), and the horizontal direction orthogonal to the front-rear direction A is referred to as the left-right direction B. Of both sides of the front-rear direction A, the jet direction of the jet flow path 32a is referred to as the front side, and the opposite side thereof is referred to as the rear side.

The injection hole 38 opens in the front surface of the apparatus main body 28. The discharge device 10 of the present embodiment includes a plurality of jet flow paths 32a (two in the illustrated example). The injection holes 38a of the plurality of injection flow paths 32a are provided at positions spaced apart from each other in the left-right direction B in the front view. The discharge hole 38b of the discharge flow path 32b opens in the front surface portion of the apparatus main body 28. The discharge hole 38b has a slit shape extending in the left-right direction B. The "front view" here means viewing from the front side in the front-rear direction A, and is synonymous with viewing from the viewpoint of FIG. 2, for example.

The injection hole 38a is provided below the discharge hole 38b in the front view. The injection hole 38a of the present embodiment is provided at a position overlapping the discharge hole 38b in front view. The injection hole 38a of the present embodiment is provided at a position within the range Sa in the left-right direction B where the discharge hole 38b is provided in the front view. The injection hole 38a is not provided at a position protruding outside this range Sa.

The injection flow path 32a injects the liquid W supplied from the liquid supply passage 22 as a motion jet J. Each figure shows the injection range of the motion jet J. The injection flow path 32a can inject the moving jet J forward from the injection hole 38. The kinetic jet J here refers to a jet in which the traveling direction when exiting from the jet flow path 32a changes periodically, that is, with time. The injection flow path 32a can inject the moving jet J from the injection hole 38 by temporally changing the injection direction Da (see FIG. 5) of the jet. The injection flow path 32a of the present embodiment radially injects a wavy jet as a moving jet J by vibrating the jet direction Da of the jet in a plane. This "injection direction Da" is based on the time when a jet flow is emitted from the injection flow path 32a to the outside. The “wavy” refers to a shape that periodically undulates in a direction orthogonal to the locus center Ct (see FIG. 5) of the jet locus JT formed by the moving jet J as it moves away from the jet flow path 32a. This "wavy" includes not only a shape that satisfies the condition as a physically strict wave, but also a shape similar to the shape. The injection flow path 32a of the present embodiment injects a moving jet J in the air. In the present embodiment, the flow velocity of the moving jet J when injected from the injection flow path 32a is 0.8 m / sec or more. The device main body 28 constitutes a fluid element that injects a moving jet J while still in a stationary state. The "fluid element" here means to inject a kinetic jet J induced by periodically switching between a first flow state and a second flow state, which will be described later, in an injection flow path 32a formed inside the "fluid element". To say.

The discharge flow path 32b can discharge the liquid W supplied from the liquid supply passage 22 as a film-like flow Fd. Each figure shows the discharge range of the membranous flow Fd. The discharge flow path 32b can discharge the membranous flow Fd passing above the motion jet J forward from the discharge hole 38b.

The membranous flow Fd can limit the scattering range of the droplets of the motion jet J by blocking the flow of the droplets. In the present embodiment, droplets are generated by the collision between the wavy jet J and an object such as the user 8. In the present embodiment, the discharge flow path 32b discharges the membranous flow Fd so as to hit the neck of the user 8, and the injection flow path 32a injects the motion jet J so as to hit the shoulder of the user 8 below the neck of the user 8. do. As a result, it is possible to limit the scattering of the droplets of the motion jet J above the membrane-like flow Fd, and it is possible to prevent the scattering of the droplets on the face of the user 8 above the membrane-like flow Fd.

The membranous flow Fd has an endped film shape in a cross section orthogonal to the flow direction. The hatching in FIG. 2 shows a cross section of the membranous flow Fd orthogonal to the flow direction when exiting the discharge flow path 32b. The term "ended film" as used herein means a film formed at a position where both ends are separated from each other in a cross section orthogonal to the flow direction. It can be said that the membranous flow Fd is acyclic in this cross section. This condition may be satisfied at least in the cross section orthogonal to the flow direction when the discharge flow path 32b is ejected. The film-like flow Fd of the present embodiment has an endped film shape that draws a straight line in such a cross section, but may be a curved shape such as an arc shape, and the specific shape thereof is not particularly limited.

According to this configuration, even in a situation where the droplets of the wavy jet J are likely to be scattered, the droplets of the wavy jet J can be blocked by the film-like flow Fd, and the scattering can be effectively prevented. In particular, since the flow direction of the wavy jet J changes with time, the jet range becomes wider than when the flow direction is constant with time. Even when the jet range is widened in this way, by making the membranous flow Fd into an endped film, it is possible to avoid merging with the membranous flow Fd and to widen the range in which the motion jet J can be directly exposed.

See FIGS. 3-6. Hereinafter, the fluid element that injects the motion jet J will be described. The injection flow path 32a includes an induced flow path 36 that induces a moving jet J and an injection hole 38a that injects the moving jet J induced by the induced flow path to the outside. The direction of the center line along the flow path center line CL1 of the induced flow path 36 is called the X direction. The X direction of this embodiment coincides with the front-back direction A. The flow path center line CL1 is located on the center of gravity line connecting the geometric center of gravity of the induced flow path 36. The "center of gravity" refers to the center of gravity of the entire plurality of intermediate flow paths 42A and 42B in a portion divided into a plurality of intermediate flow paths 42A and 42B, which will be described later, as in the induced flow path 36 of the present embodiment. It is assumed that the flow path center line CL1 extends linearly along the tangential direction of the center of gravity line passing through the downstream end 36a on the downstream side of the downstream end 36a of the induced flow path 36.

The Y direction and the Z direction, which are orthogonal to the flow path center line CL1 and orthogonal to each other, are called the width direction and the height direction, respectively. The Y direction of this embodiment is also the vibration direction of the wavy jet J. This vibration direction refers to the direction in which the wave formed by the wavy jet J vibrates when the wavy jet J exits from the jet flow path 32a in a plane orthogonal to the flow path center line CL1. The Y direction of this embodiment coincides with the left-right direction B.

The induced flow path 36 of the present embodiment has a rectangular shape in which the height dimension Lz along the Z direction is smaller than the inner width dimension Ly along the Y direction in the cross section orthogonal to the X direction. The induced flow path 36 has a cross-sectional shape symmetrical to the Z direction with respect to the flow path center line CL1 when viewed from the X direction (viewed from the viewpoint of FIG. 6). The induced flow path 36 has a cross-sectional shape symmetrical in the Y direction with the flow path center line CL1 of the induced flow path 36 as the axis of symmetry when viewed from the Z direction (viewed from the viewpoint of FIG. 4). In this embodiment, this condition also satisfies the injection hole 38a.

The induced flow path 36 includes an inlet flow path 40 in which the liquid flows in from the liquid supply passage 22 via the relay flow path 34 provided in the main body 28 of the apparatus, and a pair of intermediate flow paths 42A in which the liquid flows in from the inlet flow path 40. , 42B and a merging chamber 44 where the liquids flowing in from each of the pair of intermediate flow paths 42A and 42B merge.

In the induced flow path 36, a first wall portion 46 that blocks the flow of the liquid toward the downstream side in the inlet flow path 40 is provided. The pair of intermediate flow paths 42A and 42B are provided on both sides in the Y direction with respect to the first wall portion 46. The pair of intermediate flow paths 42A and 42B includes a left intermediate flow path 42A (first intermediate flow path) provided on one side in the Y direction and a right intermediate flow path 42B (second intermediate flow path) provided on the opposite side. including. The induced flow path 36 is provided with a second wall portion 48 that blocks the flow of the liquid W toward the downstream side in the merging chamber 44. The second wall portion 48 separates the internal space of the induced flow path 36 from the external space of the apparatus main body 28, and the injection hole 38a penetrates the second wall portion 48 in the X direction.

The injection hole 38a is formed at the downstream end of the jet flow path 32a. The injection hole 38a opens in the outer surface portion of the apparatus main body 28. The injection hole 38a of the present embodiment is opened in the front surface portion of the apparatus main body 28, and the apparatus main body 28 injects the motion jet J forward. The injection holes 38a are formed so as to continuously expand in a direction orthogonal to the X direction (Y direction in the present embodiment) toward the front side.

The injection hole 38a has a shape that narrows the flow of the liquid W in the induced flow path 36. In order to realize this, the inner width dimension of the injection hole 38a of the present embodiment is set to be smaller than the inner width dimension of the induced flow path 36 on the way to the upstream side of the jet flow path 32a. With such a design, the jet flow path 32a can inject a jet flow in a state of being filled with the liquid W. The "state filled with the liquid W" here means that the inlet flow path 40, the pair of intermediate flow paths 42A and 42B, and the confluence chamber 44 are filled with the liquid W, and the injection hole 38a is filled with the liquid W. It does not have to be. The "state filled with the liquid W" can be said to mean that the flow path on the upstream side of the upstream end of the injection hole 38a in the injection flow path 32a is filled with the liquid W. The "state filled with the liquid W" includes a state in which air does not escape and remains on the ceiling of the jet flow path 32a.

The operation of the jet flow path 32a of the present embodiment will be described. 7 and 8 are referenced. In this figure, the main liquid flow directions are indicated by arrows.

The liquid that has flowed into the inlet flow path 40 flows into the merging chamber 44 via the pair of intermediate flow paths 42A and 42B. The left intermediate flow path 42A injects the left internal jet F1 (first internal jet) into the confluence chamber 44. The right intermediate flow path 42B injects the right internal jet F2 (second internal jet) into the confluence chamber 44. These jets F1 and F2 are affected by fluctuations caused by the randomness of the liquid, and one of them becomes a dominant flow having a stronger force than the other (hereinafter referred to as a dominant flow). FIG. 8 shows a first flow state in which the left internal jet F1 is the dominant flow. FIG. 9 shows a second flow state in which the right internal jet F2 is the dominant flow.

As shown in FIG. 7, when in the first flow state, the right internal jet F2 is obstructed by the collision with the left internal jet F1. On the other hand, the left internal jet F1 flows with momentum until it collides with the second wall portion 48. The left internal jet F1 turns back in the merging chamber 44 and merges with the right internal jet F2 to amplify the momentum of the right internal jet F2. As a result, the right internal jet F2 switches to the second flow state in which the dominant flow becomes the dominant flow.

As shown in FIG. 8, when in the second flow state, the left internal jet F1 is obstructed by the collision with the right internal jet F2. On the other hand, the right internal jet F2 flows with momentum until it collides with the second wall portion 48. The right internal jet F2 folds back in the merging chamber 44 and merges with the left internal jet F1 to amplify the momentum of the left internal jet F1. As a result, the left internal jet F1 switches to the first flow state in which the dominant flow becomes the dominant flow.

As a result of the above, the first flow state and the second flow state are periodically switched. When in the first flow state, the left internal jet F1 forms a liquid flow F3 that passes through the jet holes 38a. This liquid flow F3 has a velocity vector toward one side (right side in the figure) and the front side in the Y direction. When in the second flow state, the right internal jet F2 forms a liquid flow F4 that passes through the jet holes 38a. This liquid flow F4 has a velocity vector toward the other side (left side in the figure) and the front side in the Y direction. By periodically switching these flow states, the magnitude (vector quantity) of the velocity vector in the Y direction of the liquid flows F3 and F4 passing through the injection hole 38a periodically increases or decreases. As a result, the jet direction Da of the jet J vibrates in the plane, so that the above-mentioned wavy jet J is jetted.

In injecting the wavy jet J (moving jet J) in this way, the induced flow path 36 internally generates an induced flow that induces the moving jet J. This "induced flow" is the internal jets F1 and F2 in this embodiment. The injection hole 38a injects the motion jet J thus induced by the induced flow path 36 to the outside.

In such a discharge device 10, the injection flow path 32a has a self-cleaning unit 50 that self-cleans the injection flow path 32a when injecting the moving jet J. The term "self-cleaning" as used herein means, for example, utilizing a change in the flow of the liquid W in the injection flow path 32a generated by switching between the first flow state and the second flow state while injecting the motion jet J. This means cleaning the jet flow path 32a. The self-cleaning unit 50 is formed by a jet flow path 32a. Since the injection flow path 32a of the present embodiment is formed inside the fluid element, the first flow state and the second flow state are always switched periodically during the injection of the motion jet J. Therefore, the self-cleaning unit 50 can always clean the injection flow path 32a during the injection of the moving jet J.

The self-cleaning unit 50 of the present embodiment cleans the injection flow path 32a by the change in pressure due to the liquid W flowing in the injection flow path 32a while injecting the motion jet J. In the jet flow path 32a of the present embodiment, since the pressure changes periodically in the merging chamber 44, the flow path of the merging chamber 44 is self-cleaned.

9 and 10 are referenced. 9 and 10 show the pressure distribution due to the liquid W in the jet flow path 32a when the liquid W flows from the relay flow path 34 toward the injection hole 38a. In the first pressure distribution state of the liquid W in the first flow state of FIG. 9, the pressure of the liquid W in the right side region R2 is a negative pressure, and the pressure of the liquid W in the region other than the right side region R2 of the merging chamber 44. Is positive pressure. In the second pressure distribution state of the liquid W in the second flow state of FIG. 10, the pressure of the liquid W in the left side region R1 is a negative pressure, and the pressure of the liquid W in the region other than the left side region R1 of the merging chamber 44. Is positive pressure. In each of the positive pressure regions of FIGS. 9 and 10, a relatively dark portion indicates a region of relatively high pressure at positive pressure. By periodically switching between the first flow state and the second flow state, the pressure distribution state of the liquid W in the jet flow path 32a is continuously switched between the first pressure distribution state and the second pressure distribution state. As a result, in the left side region R1 and the right side region R2, the pressure of the liquid W continuously changes between the positive pressure and the negative pressure. As a result, the left side region R1 and the right side region R2 are washed. In regions other than the left side region R1 and the right side region R2 of the merging chamber 44, the pressure of the liquid W changes continuously between high pressure and low pressure at positive pressure. As a result, the regions other than the left side region R1 and the right side region R2 of the merging chamber 44 are washed. As described above, the self-cleaning unit 50 injects the moving jet J by changing the pressure distribution state of the liquid W in the injection flow path 32a between the first pressure distribution state and the second pressure distribution state during the injection. The flow path 32a is washed.

The effect of the above discharge device 10 will be described. When the discharge device 10 is installed for a long time, moisture and human sebum are nourished to generate stains such as biofilm in the jet flow path 32a. In this respect, the discharge device 10 of the present embodiment includes a self-cleaning unit 50 that self-cleans the injection flow path 32a by injecting a jet stream. According to this configuration, by injecting a jet stream, it is possible to clean dirt such as a biofilm in the injection flow path 32a.

The self-cleaning unit 50 of the present embodiment cleans the injection flow path 32a by changing the pressure of the liquid W flowing in the injection flow path 32a while injecting the jet flow. When the pressure due to the liquid W in the jet flow path 32a becomes low, the peripheral edge portion of the biofilm is partially peeled from the jet flow path 32a, and the liquid W enters the gap between the peeled portions. On the other hand, when the pressure due to the liquid W in the jet flow path 32a becomes high, the biofilm is pressed with the liquid W still in the gap of the peeled portion. According to this configuration, the biofilm is repeatedly peeled off and pressed down by changing the pressure due to the liquid W in the jet flow path 32a. As a result, peeling of the biofilm is promoted.

The injection flow path 32a of the present embodiment is formed in a fluid element capable of injecting a moving jet J. The self-cleaning unit 50 cleans the injection flow path 32a by changing the pressure due to the liquid W flowing in the injection flow path 32a while the fluid element is injecting the motion jet J. According to this configuration, since the fluid element is used, the pressure due to the liquid W flowing in the injection flow path 32a is changed without controlling the supply flow rate of the pump 24 or the drive control of the actuator that changes the injection direction Da of the jet flow. It is possible to make it.

The self-cleaning unit 50 of the present embodiment self-cleans the injection flow path 32a by injecting the moving jet J in a state where the injection flow path 32a is filled with the liquid W. If the jet flow path 32a is not filled with the liquid W, the liquid W does not flow in the portion not filled with the liquid W, and the portion cannot be washed. In this respect, in the present embodiment, by injecting the moving jet J in a state where the injection flow path 32a is filled with the liquid W, a higher self-cleaning effect can be exhibited.

In the present embodiment, the pressure due to the liquid W flowing in the jet flow path 32a changes between positive pressure and negative pressure. According to this configuration, when the pressure due to the liquid W in the jet flow path 32a becomes a negative pressure, the biofilm is attracted inward to the jet flow path 32a. Therefore, the peripheral portion of the biofilm can be largely peeled off from the jet flow path 32a. When the pressure due to the liquid W in the jet flow path 32a becomes a positive pressure, the biofilm is pressed outward in the jet flow path 32a. By repeating this change in pressure between the negative pressure and the positive pressure, the peeling of the biofilm is further promoted.

The self-cleaning unit 50 of the present embodiment always self-cleans the injection flow path 32a during jet injection. According to this configuration, the jet flow path 32a is cleaned in a normal use state without requiring special control of the pump 24 such as backflow of the liquid W from the jet flow path 32a toward the pump 24. Therefore, it becomes easy to keep the jet flow path 32a clean.

The jet flow path 32a of the present embodiment injects jet J from above the bathtub 16. According to this configuration, the jet J can be applied to the neck, shoulders, back, etc. of the user 8 in the sitting position in the bathtub 16. As a result, the massage effect can be given to the user 8.

In the present embodiment, the flow velocity of the jet flow J when jetted from the jet flow path 32a is 0.8 m / sec or more. If the flow velocity is less than 0.8 m / sec, the flow of the liquid W staying inside the injection flow path 32a becomes weak, and it becomes difficult for the motion jet J to be injected from the injection flow path 32a. Therefore, the pressure change between the first flow state and the second flow state is less likely to occur in the jet flow path 32a, and the jet flow path 32a cannot be effectively cleaned. On the other hand, when the flow velocity is 0.8 m / sec or more, the motion jet J is likely to be injected from the injection flow path 32a. Therefore, a pressure change between the first flow state and the second flow state is likely to occur in the jet flow path 32a. As a result, a higher self-cleaning effect can be exhibited. This effect was obtained by the experimental study of the inventor of the present application.

Other variants of each component will be described.

Specific examples of the sanitary equipment 12 are not particularly limited. For example, the sanitary equipment 12 may be a toilet facility, a kitchen facility, a washbasin facility, or the like. Specific examples of the tank body of the sanitary equipment 12 are not particularly limited. For example, the tank body of the sanitary equipment 12 may be a sink such as a kitchen sink or a hand wash sink.

The bathroom facility 14 may be provided with at least a bathtub 16, and may not have a bathroom wall, a washroom floor, or the like.

The storage tank 20 is not limited to the bathtub 16. For example, the storage tank 20 may be provided separately from the bathtub 16. Water may be supplied to the liquid supply passage 22 from a water supply facility such as a water supply provided outside the building where the sanitary facility 12 is installed. In this case, the discharge system 18 does not need to include the pump 24 because the water in a state where the water supply pressure is applied is supplied to the liquid supply passage 22 from the water supply equipment.

Specific examples of the discharge device 10 are not particularly limited. For example, the discharge device 10 may be used as a shower device or a faucet device. Therefore, the discharge device 10 is not limited to the one fixed to the bathtub 16.

The discharge device 10 may inject the jet stream J so as to hit the user's body, and the position where the jet stream J hits the user is not particularly limited. For example, the discharge device 10 may inject the jet stream J so as to hit the user's body from the side surface side.

The base 30 to which the apparatus main body 28 is attached may be a target other than the bathtub 16 unlike the embodiment.

Specific examples of the liquid W to be sprayed are not limited to bath water. The liquid W may be, for example, a liquid detergent or the like.

The self-cleaning of the present embodiment utilizes the change in the flow of the liquid W in the injection flow path 32a generated by switching between the first flow state and the second flow state while the motion jet J is being injected. It was decided to clean the road 32a. Not limited to this. For example, the self-cleaning may be simply cleaning the jet flow path 32a by utilizing the change in the flow of the liquid W in the jet flow path 32a, or cleaning the jet flow path 32a by another method. It may be a thing.

The self-cleaning unit 50 of the present embodiment cleaned the jet flow path 32a by the pressure change due to the liquid W in the jet flow path 32a. Not limited to this. The self-cleaning unit 50 may clean the jet flow path 32a by another method.

Specific examples of the motion jet J are not limited to the wavy jet. The motion jet J may be, for example, a spiral jet that is jetted radially by swirling the jet direction around the swirl center.

The mechanism for inducing the wavy jet J by the induced flow path 36 is not particularly limited. The induced flow path 36 may, for example, generate a Karman vortex as an induced flow to induce a wavy jet, or may induce a wavy jet by utilizing the Coanda effect.

The discharge flow path 32b discharges the membranous flow Fd. Not limited to this. The discharge device 10 may discharge a shower flow or a mist flow.

In the present embodiment, the jet flow path 32a injects the motion jet J in a state of being filled with the liquid W. Not limited to this. The jet flow path 32a may inject the motion jet J in a state where it is not filled with the liquid W.

In this embodiment, the motion jet J was injected. Not limited to this. A jet may be injected in which the traveling direction when exiting from the injection flow path 32a is periodic, that is, does not change with time.

In the present embodiment, the jet J is jetted from above the bathtub 16. Not limited to this. For example, when the discharge device 10 is applied to a jet bath, the jet J may be injected from below the bathtub 16.

In the present embodiment, the flow velocity of the jet flow J when jetted from the jet flow path 32a is set to 0.8 m / sec or more. Not limited to this. The flow velocity of the jet flow J when jetted from the jet flow path 32a may be less than 0.8 m / sec.

The embodiments and modifications have been described above. Any combination of the above components is also effective as an aspect of the technical idea that abstracts the embodiments and modifications. For example, an arbitrary explanatory matter of another embodiment may be combined with an embodiment, or an arbitrary explanatory matter of an embodiment and another modified example may be combined with a modified example. The hatching attached to the cross section of the drawing does not limit the material of the object to which the hatching is attached.

10 ... Discharge device, 12 ... Sanitary equipment, 28 ... Device body, 32a ... Jet flow path, 36 ... Induced flow path, 38a ... Injection hole, 50 ... Self-cleaning unit.

Claims (8)

An injection flow path that can inject a jet, and an injection flow path
A self-cleaning unit provided in the injection flow path and self-cleaning the injection flow path by injecting the jet flow.
Equipped with a discharge device. The discharge device according to claim 1, wherein the self-cleaning unit cleans the injection flow path by changing the pressure of the liquid flowing in the injection flow path while the jet flow is being injected. The injection flow path is capable of injecting a moving jet.
The discharge device according to claim 1 or 2, wherein the self-cleaning unit cleans the injection flow path by changing the pressure due to the pressure of the liquid flowing in the injection flow path while injecting the motion jet. The discharge device according to claim 3, wherein the injection flow path injects the moving jet in a state of being filled with the liquid. The discharge device according to any one of claims 2 to 4, wherein the pressure varies between positive pressure and negative pressure. The discharge device according to any one of claims 1 to 5, wherein the self-cleaning unit always cleans the injection flow path during injection of the jet. The discharge device is fixed to the bathtub and
The discharge device according to any one of claims 1 to 6, wherein the jet flow path injects the jet flow from above the bathtub. The discharge device according to any one of claims 1 to 7, wherein the flow velocity of the jet flow when injected from the injection flow path is 0.8 m / sec or more.

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