JP5708413B2 - Sanitary washing device - Google Patents

Description

  Aspects of the present invention generally relate to a sanitary washing device, and more particularly, to a sanitary washing device that cleans a human body part of a user sitting on a western-style seated toilet with water.

  For example, when cleaning a human body part such as “wet”, there is a device that discharges cleaning water over substantially the entire human body part by discharging cleaning water having a predetermined spread. For example, there is a sanitary washing device that can simultaneously discharge a direct jet and a swirling jet from the same water outlet to obtain a sense of volume and a high cleaning performance (Patent Document 1).

  However, in the sanitary washing apparatus described in Patent Document 1, since the direct jet is further discharged into the hollow portion inside the swirling jet, the washing pressure at the center of the washing area may be relatively high. If it does so, there exists a possibility that a strong irritation | stimulation may be added to an anus part more than necessary. Therefore, there is room for improvement in the washing feeling of the butt washing required for a user who has lost physical condition such as a laceration due to wrinkles or an abrasion due to excessive wiping. That is, there is a demand for users who have lost their physical condition to gently wash a wide area around the anus at once. There is room for improvement in this regard.

  Also, a sanitary washing device that performs bidet washing by landing the wash water on the female local area, and sprays the wash water so that it diffuses in a hollow conical shape from the water discharge hole, and evenly within a predetermined range of the female local area There is a sanitary washing device for landing (Patent Document 2). In the sanitary washing device described in Patent Literature 2, by giving pulsation to the washing water, a granulated water flow having a larger diameter can be generated, and the landing power in the landing portion can be further increased.

  However, since the diameter of the granulated water flow is increased over substantially the entire landing portion, the sense of volume around the buttocks local area where the sense of volume is easily felt in the vicinity of the buttocks local area may be weakened. Therefore, there is room for improvement in terms of realizing a sufficient amount of feeling required for butt washing.

JP 2007-100300 A JP 2011-74697 A

  The present invention has been made based on the recognition of such a problem, and an object of the present invention is to provide a sanitary washing apparatus that can give a feeling of volume with a small flow rate and can realize a comfortable buttocks washing.

The first invention is a sanitary washing device that performs washing by spraying washing water from a nozzle's water discharge hole toward a human body part, and water discharge means for discharging the washing water from the water discharge hole into a hollow cone shape, Before the washing water discharged in the hollow conical shape from the water discharge hole reaches the human body local part, a granulated water flow is generated by crushing the liquid film of the washing water discharged in the hollow cone shape. And a crushing means for pouring the granulated water flow into a hollow portion of the wash water discharged into the hollow conical shape, provided downstream of the water discharge means and upstream of the water discharge hole, A liquid film thickness expanding means for increasing the thickness of the liquid film of the wash water discharged in the hollow conical shape from the water discharge hole, rather than the thickness of the liquid film of the wash water discharged in the hollow cone shape from the water discharge means; The granulated water flow comprises a first water flow group and the And a second stream of water group with slow velocity than smaller particle size and the first water flow group than 1 of the water flow group, wherein the first water flow group and the second water flow group, the It is alternately generated from the granulated water flow and lands on the human body part in an independent state. The first water flow group lands on the outer periphery of the human body local part, and the second water flow group. Is a sanitary washing device characterized in that it lands on the center of the human body local part .

According to this sanitary washing device, a sufficient sense of volume required for butt washing can be realized by the first water flow group having a larger particle size and a faster flow rate. In addition, the second group of water streams having a smaller particle size and a slower flow rate can be used to gently wash a wide range at once without feeling uncomfortable feeling, for example, when washing with a larger flow rate than necessary. it can. Moreover, the 1st water flow group and the 2nd water flow group land on a human body local part in the state which became independent, respectively. Therefore, it is possible to suppress a feeling of hollowing out of the hollow portion and to clean a wide range uniformly. As a result, it is possible to give a feeling of volume with a small flow rate, and it is possible to realize comfortable buttocks cleaning.
Moreover, according to this sanitary washing apparatus, the 1st water flow group which has a larger particle size and a faster flow velocity lands on the outer peripheral part of the human body local part where it is easy to feel a volume feeling in the vicinity of the human body local part. Therefore, it is possible to give a sufficient amount of feeling or a firm amount of feeling. In addition, the second water stream group having a smaller particle diameter and a slower flow velocity is landed on the central part of the human body part where dirt easily adheres. Therefore, for example, compared with the case where a straight flow flows to the center of the human body local part, it is possible to suppress the strong stimulation from being applied to the central part of the human body local part more than necessary. Thereby, even a user who has wrinkles, lacerations, scratches caused by excessive wiping, etc. around the human body portion can be gently and quickly washed at once.
Moreover, according to this sanitary washing apparatus, as a result, since the 1st water flow group and the 2nd water flow group are discharged alternately from a water discharge hole, it uses as a continuous water discharge in which the hollow part is not vacant. Can make people feel. Therefore, a feeling of volume can be given with a small flow rate, and a wide range can be gently and quickly washed.

Further, according to a second aspect of the present invention, in the first aspect, the amount of water in the first water stream group in the human body local part is greater than the amount of water in the second water stream group in the human body local part. Device.

  According to this sanitary washing apparatus, it is possible to give a feeling of volume required for butt washing, and to realize comfortable butt washing.

According to a third aspect of the present invention, in the first or second aspect of the invention, the first water stream group overtakes the second water stream group before the second water stream group reaches the human body part. This is a sanitary washing device characterized by having no.

  According to this sanitary washing device, the first water flow group and the second water flow group alternately land on the human body part. Therefore, it is possible to make the user feel as continuous water discharge in which the hollow portion is not hollow. Therefore, a feeling of volume can be given with a small flow rate, and a wide range can be gently and quickly washed.

In addition, according to a fourth invention, in any one of the first to third inventions, the first water flow group and the second water flow group are the length of the liquid film when the liquid film is crushed. The sanitary washing device is produced by periodically changing the thickness of the liquid film when the liquid film is crushed.

  According to this sanitary washing apparatus, when crushed in a state where the length of the liquid film is longer and a state where the thickness of the liquid film is thicker, it is granulated with a larger particle size and a faster flow rate. A water stream is generated. In this case, since the liquid film is crushed in a longer state, the liquid film is crushed in a wider state. Therefore, the granulated water flow lands on the outer periphery of the human body local area with a larger particle size and a faster flow rate.

  On the other hand, when the length of the liquid film is shorter and the thickness between the liquids is smaller, a granulated water stream having a smaller particle size and a slower flow rate is generated. In this case, since the liquid film is crushed in a shorter state, it is crushed in a state where it does not spread so much. Therefore, the granulated water stream reaches the center of the human body part with a smaller particle size and a slower flow rate.

  According to this, it is possible to increase the water landing force at the outer peripheral portion of the human body local area where the sense of volume is easily felt in the vicinity of the human body local area. Therefore, it is possible to give a sufficient feeling or a firm feeling required for butt washing. On the other hand, it is possible to reduce the landing force at the center of the human body local area. Therefore, for example, compared with the case where a straight flow flows to the center of the human body local part, it is possible to suppress the strong stimulation from being applied to the central part of the human body local part more than necessary. As a result, it is possible to realize the feeling of cleaning required for the buttocks cleaning in which a wide range is gently and quickly cleaned.

  According to the aspect of the present invention, there is provided a sanitary washing device that can give a sense of volume with a small flow rate and can realize comfortable butt washing.

It is a perspective schematic diagram showing the toilet apparatus provided with the sanitary washing apparatus concerning embodiment of this invention. It is a conceptual schematic diagram showing the principal part structure of the sanitary washing apparatus concerning this embodiment. It is a conceptual schematic diagram showing the outline of the state of the wash water discharged from the nozzle of this embodiment. It is a conceptual schematic diagram showing the outline of the state of the wash water discharged from the nozzle of this embodiment. It is a graph showing the landing power of washing water at a position away from the water landing part or the water discharge hole by a predetermined distance. It is a cross-sectional schematic diagram which illustrates the specific example of the nozzle of this embodiment. It is a cross-sectional schematic diagram which illustrates the modification of a throat. It is a cross-sectional schematic diagram which illustrates the internal structure of the pulsation generating means of this embodiment. It is a graph which illustrates the voltage waveform applied to a pulsation generation means, and the flow velocity waveform of the water of the downstream of a pulsation generation means. It is a graph which illustrates the velocity distribution of the particle | grains which pass the vicinity of a landing position. It is a graph which illustrates the space occupation rate of the particle | grains which pass the vicinity of a landing position. It is a photograph figure showing the state of the washing water discharged from the nozzle of this embodiment. It is a photograph figure showing the state of the washing water discharged from the nozzle of this embodiment.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
FIG. 1 is a schematic perspective view showing a toilet apparatus provided with a sanitary washing device according to an embodiment of the present invention.

  The toilet device shown in FIG. 1 includes a Western-style seat toilet (hereinafter simply referred to as “toilet” for convenience of explanation) 800 and a sanitary washing device 100 provided thereon. The sanitary washing device 100 includes a casing 400, a toilet seat 200, and a toilet lid 300. The toilet seat 200 and the toilet lid 300 are pivotally supported with respect to the casing 400 so as to be freely opened and closed. However, the toilet lid 300 is not necessarily provided.

  The casing 400 incorporates a local cleaning function unit that realizes cleaning of a human body part of a user sitting on the toilet seat 200. Further, for example, the casing 400 is provided with a seating detection sensor 404 that detects that the user has sat on the toilet seat 200. When the seating detection sensor 404 detects a user sitting on the toilet seat 200, when the user operates an operation unit such as a remote controller (not shown), the nozzle 410 can be advanced into the bowl 801 of the toilet 800. . In the sanitary washing device 100 shown in FIG. 1, the nozzle 410 has entered the bowl 801.

  One or a plurality of water discharge holes 411 are provided at the tip of the nozzle 410. And the nozzle 410 can wash | clean the human body part of the user who sat on the toilet seat 200 by injecting water from the water discharge hole 411 provided in the front-end | tip part. For example, in the nozzle 410 illustrated in FIG. 1, one of the two water discharge holes 411 is a water discharge hole for bidet cleaning, and the other water discharge hole 411 is a water discharge hole for butt cleaning. . In the present specification, “water” includes not only cold water but also heated hot water.

FIG. 2 is a conceptual schematic diagram showing the main configuration of the sanitary washing device according to the present embodiment.
3 and 4 are conceptual schematic diagrams showing an outline of the state of the washing water discharged from the nozzle of the present embodiment.
FIG. 4 is a conceptual schematic diagram showing an outline of the state of the cleaning water at the landing position when viewed in the direction of the arrow A15 shown in FIG.

  As described above with reference to FIG. 1, the nozzle 410 according to the present embodiment can spray the cleaning water 500 from the water discharge hole 411 toward the human body part of the user sitting on the toilet seat 200. At this time, as shown in FIG. 2, the cleaning water 500 is discharged from the water discharge hole 411 in a hollow conical shape as a liquid film having a hollow portion at the center. That is, the sanitary washing device 100 according to the present embodiment includes the water discharge means 401 that discharges the wash water in a hollow conical shape from the water discharge hole 411 of the nozzle 410. Hereinafter, for convenience of explanation, the washing water discharged in the hollow conical shape is referred to as “hollow conical discharged water”.

  In the hollow portion of the hollow conical water discharge 510, the amount of air discharged from the hollow portion of the hollow conical water discharge 510 to the outside increases following the flow of the liquid film. On the other hand, since the passage of air entering the hollow portion of the hollow conical water discharge 510 is blocked by the liquid film of the hollow conical water discharge 510, the air is discharged from the hollow portion of the hollow conical water discharge 510 to the center of the air. It will be limited. Therefore, the amount of air entering the hollow portion of the hollow conical water discharge 510 is reduced, and a negative pressure state in which the pressure is lower than the outside air is generated in the hollow portion of the hollow conical water discharge 510.

  The sanitary washing device 100 according to the present embodiment crushes the liquid film of the hollow conical water discharge 510 so as to fill the hollow portion of the hollow conical water discharge 510 before the hollow conical water discharge 510 reaches the human body part. A crushing means is provided. That is, although the details of the crushing means will be described later, as shown in FIG. 2, the water flow granulated by crushing the liquid film of the hollow conical water discharge 510 (hereinafter, for convenience of explanation, “granulated water flow”). "). A part of the granulated water flow 520 traveling in the traveling direction of the liquid film flows into the hollow portion by the negative pressure generated in the hollow portion of the hollow conical water discharge 510. Thereby, the crushing means can fill the hollow portion of the hollow conical water discharge 510 with the granulated water flow 520.

  That is, in FIG. 1, the washing water 500 sprayed from the nozzle 410 is first discharged from the water discharge hole 411 as the hollow conical water discharge 510 and sat on the toilet seat 200 in a state where the hollow portion is filled with the granulated water flow 520. You can land on a wider area of the user's body.

  As shown in FIG. 2, the sanitary washing device 100 according to the present embodiment has a liquid film thickness enlargement unit 402 provided on the downstream side of the water discharge unit 401 and on the upstream side of the water discharge hole 411 of the nozzle 410. Is provided. The liquid film thickness expanding means 402 increases the thickness of the liquid film of the hollow conical water discharge 510. More specifically, the liquid film thickness enlarging means 402 is configured such that the liquid film thickness D2 of the hollow conical water discharge 510 discharged from the water discharge hole 411 of the nozzle 410 is the hollow conical shape discharged from the water discharge means 401. It can be made thicker than the thickness D1 of the liquid film of the discharged water. Therefore, the diameter of the granulated water flow 520 generated by crushing the liquid film of the hollow conical water discharge 510 is about 1 mm (millimeters), for example, and the diameter is about 10 to 100 μm (microns). Big in comparison.

  As shown in FIG. 3A and FIG. 3B, the cleaning water 500 ejected from the nozzle 410 has a first water discharge 501 and a second water discharge 502. That is, the nozzle 410 is configured to discharge the first water discharge 501 and the second water discharge 502 as a result. The flow rate of the first water discharge 501 is faster than the flow rate of the second water discharge 502. In other words, the flow rate of the second water discharge 502 is slower than the flow rate of the first water discharge 501. That is, in the sanitary washing device 100 according to the present embodiment, the first water discharge 501 having a flow rate faster than the flow rate of the second water discharge 502 and the second water discharge having a flow rate slower than the flow rate of the first water discharge 501. 502 is generated.

As shown in FIG. 3A, the first water discharge 501 is discharged from the water discharge hole 411 as the first hollow conical water discharge 511, and is crushed before landing, and the first granulated water flow 521. Become. The plurality of first granulated water streams 521 form a first water stream group 521a.
As shown in FIG. 3B, the second water discharge 502 is discharged from the water discharge hole 411 as the second hollow conical water discharge 512, and is crushed before landing, and the second granulated water flow 522. Become. The plurality of second granulated water streams 522 form a second water stream group 522a.
That is, the hollow conical water discharge 510 includes a first hollow conical water discharge 511 and a second hollow conical water discharge 512. The granulated water stream 520 includes a first granulated water stream 521 and a second granulated water stream 522.

  Since the flow rate of the first water discharge 501 is faster than the flow rate of the second water discharge 502, the thickness of the liquid film of the first hollow conical water discharge 511 is the thickness of the liquid film of the second hollow conical water discharge 512. Thicker than that. In addition, the length of the liquid film of the first hollow conical water discharge 511 is longer than the length of the liquid film of the second hollow conical water discharge 512. That is, the liquid film of the first hollow conical water spouting 511 is crushed in a thicker state and a longer state than the liquid film of the second hollow conical water spouting 512, and the first granulation. A water flow 521 is obtained. As such, the first granulated water stream 521 has a larger particle size and a faster flow rate compared to the second granulated water stream 522.

  As described above, the liquid film of the first hollow conical water discharge 511 is longer than the liquid film of the second hollow conical water discharge 512, that is, at a position farther from the water discharge hole 411. It is crushed. Therefore, the liquid film of the first hollow conical water spouting 511 is crushed in a wider state as compared with the liquid film of the second hollow conical water discharging 512. Therefore, as shown in FIG. 3 (a), the first granulated water stream 521 has a larger particle size and a higher flow rate as compared with the second granulated water stream 522. Before the first granulated water flow 521 is filled in the hollow portion, the water is landed on the outer peripheral portion of the human body local portion. And as the arrow A11 and arrow A12 represented to Fig.3 (a), the 1st water discharge 501 lands on the outer peripheral part of a human body local part as the 1st granulated water flow 521, and the center part of a human body local part It has a flow in the direction.

  On the other hand, the second water discharge 502 has an operation opposite to that of the first water discharge 501. That is, the liquid film of the second hollow conical water discharge 512 is crushed in a thinner state and a shorter state than the liquid film of the first hollow conical water discharge 511 to become the second granulated water flow 522. . As such, the second granulated water stream 522 has a smaller particle size and a slower flow rate compared to the first granulated water stream 521.

  Further, the liquid film of the second hollow conical water spouting 512 is crushed in a state where it does not spread so much as compared with the liquid film of the first hollow conical water spouting 511. Therefore, as shown in FIG. 3B, the second granulated water stream 522 has a smaller particle size and a slower flow rate than the first granulated water stream 521, and is further hollow. It fills the part and lands on the center of the human body. Then, as indicated by arrows A13 and A14 shown in FIG. 3 (b), the second water discharge 502 lands on the center of the human body portion as the second granulated water flow 522, and the outer peripheral portion of the human body portion It has a flow in the direction.

  As will be described in detail later, the landing force of the first water discharge 501 on the human body part is larger than the landing force of the second water discharge 502 on the human body part.

  Here, in the specification of the present application, “landing force” means at least one of the landing flow rate, the landing water amount, and the landing pressure of the cleaning water 500, and the cleaning water per unit area per unit time. This is the momentum that has the power to remove, peel off, or float. Further, the “water landing flow rate” refers to the flow rate of the cleaning water 500 at a position away from the water landing part or the water discharge hole 411 by a predetermined distance. Further, the “water landing pressure” is a momentum per unit area at a position away from the water landing portion or the water discharge hole 411 by a predetermined distance, and refers to a force that removes, peels off, or floats. Further, the “amount of water landing” is the amount of water landing per unit time at a position away from the water landing portion or the water discharge hole 411 by a predetermined distance, and refers to the power to wash away dirt.

  Thereby, the first water discharge 501 can give a larger sense of volume than the second water discharge 502. Further, a greater detergency can be ensured by the flow of the first water discharge 501 after landing on the human body local area and the flow of the second water discharge 502 after landing on the human body local area. Here, in the present specification, “feeling of volume” refers to a skin sensation felt when a large water flow with a large amount of water lands on the skin surface, or a sense of washing away dirt with a large flow rate. In addition, since the cleaning water 500 ejected from the nozzle 410 includes the first water discharge 501 and the second water discharge 502, it is possible to give a sense of volume with a small flow rate and to ensure the cleaning power with certainty. The human body part can be gently washed by the granulated water streams 521 and 522.

The crushing position of the liquid film of the hollow conical water spouting 510 varies periodically. For example, the first water discharge 501 and the second water discharge 502 are alternately discharged from the nozzle 410 as a result. As described above, the liquid film of the first hollow conical water discharge 511 is longer than the liquid film of the second hollow conical water discharge 512, that is, at a position farther from the water discharge hole 411. It is crushed. On the other hand, the liquid film of the second hollow conical water discharge 512 is crushed in a shorter state than the liquid film of the first hollow conical water discharge 511, that is, at a position closer to the water discharge hole 411. Thereby, the crushing position of the liquid film of the hollow conical water discharge 510 periodically varies.
The means for periodically changing the crushing position of the liquid film of the hollow conical water discharge 510 will be described in detail later.

  When the crushing position of the liquid film of the hollow conical spouting water 510 is periodically changed, the particle diameter and the flow velocity of the granulated water flow 520 are periodically changed after the liquid film of the hollow conical water discharging 510 is crushed. Therefore, it is possible to give an appropriate amount of feeling required for butt washing, and the human body part can be gently washed.

  Further, when the crushing position of the liquid film of the hollow conical water discharge 510 is periodically changed, the length of the liquid film and the thickness of the liquid film when the liquid film of the hollow conical water discharge 510 is crushed are periodically changed. To do. As a result, in the first granulated water stream 521 (or the first water stream group 521a) and the second granulated water stream 522 (or the second water stream group 522a), the liquid film of the hollow conical water discharge 510 is crushed. It is generated by periodically varying the length of the liquid film and the thickness of the liquid film.

  The first water discharge 501 and the second water discharge 502 land on the human body part in an independent state. That is, the first water flow group 521a and the second water flow group 522a land on the human body part in an independent state. In other words, the first water discharge 501 (or the first water flow group 521a) and the second water discharge 502 (or the second water flow group 522a) are in a state where they do not interfere with each other or one is not disturbed from the other. Land on the water.

  That is, the liquid film of the first hollow conical spouting water 511 is crushed at a position nearer to the human body than the liquid film of the second hollow conical spouting water 512, and is crushed in a more expanded state. Therefore, the first discharged water 501 lands on the outer peripheral portion of the human body portion without being filled with the hollow portion by the first granulated water flow 521 as much as the second discharged water 502. Therefore, as shown in FIG. 4, the first water discharge 501 (or the first water flow group 521 a) reaches the outer peripheral portion of the human body local portion as ring-shaped water discharge.

  On the other hand, the liquid film of the second hollow conical water spouting 512 is crushed at a position far from the human body part and not so wide as compared with the liquid film of the first hollow conical water spouting 511. Therefore, the second granulated water stream 522 is drawn into the hollow portion for a longer time than the first granulated water stream 521. Then, as compared with the first water discharge 501, the second water discharge 502 lands on the central part of the human body part in a state where the hollow portion is more filled with the second granulated water flow 522. Therefore, as shown in FIG. 4, the second water discharge 502 (or the second water flow group 522 a) reaches the center of the human body local area as solid water discharge.

  As shown in FIG. 4, the second water discharge 502 (or the second water flow group 522 a) is the first water discharge 501 (or the first water flow group 521 a) that reaches the human body part as a ring-like water discharge. The water reaches the human body part as solid water discharge inside.

  According to this, the 1st water discharge 501 which gives a feeling of volume lands on the outer peripheral part of a human body local part which is easy to feel a volume feeling in the vicinity of a human body part as ring-shaped water discharge. Therefore, the first water discharge 501 can give a sufficient sense of volume or a firm sense of volume. On the other hand, the second water discharge 502 is landed as solid water discharge at the central portion of the human body part with a smaller particle size and a slower flow rate. Therefore, the second water discharge 502 can wash away the dirt at the center of the human body part quickly while ensuring the detergency, and gently wash the center part of the human body part.

  As described above, as a result, the first water discharge 501 and the second water discharge 502 are alternately discharged from the nozzle 410. That is, the first water discharge having the ring-shaped water discharge and the second water discharge having the solid water discharge are alternately discharged. Thereby, a user can be made to feel as continuous water discharge in which the hollow part has not lost. Therefore, it is possible to give a sense of volume with a small flow rate, and it is possible to ensure cleaning power. In addition, as described above, the first water discharge 501 and the second water discharge 502 land on the human body part in a state where each is independent. For this reason, the hollow portion can be prevented from being hollowed out with a small flow rate, and a wide range can be gently and quickly washed. Thereby, comfortable buttocks cleaning can be realized. Note that the user feels that the water discharge is continuous, for example, the time between the timing when the first water discharge 501 lands and the timing when the subsequent first water discharge 501 lands, This is a case of about 0.01 seconds to 0.07 seconds. That is, the range of the frequency (perception limit frequency) that the user feels as continuous water discharge is, for example, about 15 hertz (Hz) to about 100 Hz.

  In addition, when it changes from the 1st water discharge 501 to the 2nd water discharge 502, or when it changes to the 1st water discharge 501 from the 2nd water discharge 502, a ring-shaped water discharge and a solid water discharge slightly interfere. There is a case. For example, the ring-shaped water discharge flows to the inside of the ring and interferes with the solid water discharge, or the solid water discharge flows to the outside of the ring and interferes with the ring-shaped water discharge. Even in this case, in the specification of the present application, the first water discharge is the water discharged on the human body part in an independent state, or the water discharged on the human body part in a state where they do not interfere with each other or one of them is not disturbed from the other. Suppose that it is 501 and the 2nd water discharge 502. Then, the second water discharge 502 (or the second water flow group 522a) is arranged inside the first water discharge 501 (or the first water flow group 521a) that lands on the human body part as a ring-like water discharge. Water is discharged to the human body part as solid water discharge in a state independent of the water discharge 501 (or the first water flow group 521a).

FIG. 5 is a graph showing the landing force of the cleaning water at a position away from the landing portion or the water discharge hole by a predetermined distance.
As described above with reference to FIGS. 2-4, the first granulated water stream 521 has a larger particle size and a faster flow velocity at the outer periphery of the local human body than the second granulated water stream 522. Land on the water. Therefore, as shown in FIG. 5, the landing force of the first water discharge 501 in the human body local part is larger than the landing force of the second water discharge 502 in the human body local part. That is, the sanitary washing device 100 according to this embodiment increases the flow rate of the wash water 500 ejected from the nozzle 410, thereby increasing the landing force of the first water discharge 501 in the human body local part of the second water discharge 502 in the human body local part. It can be made larger than the landing force. Moreover, the landing force of the first water discharge 501 in the human body local area is larger than the landing force F1 that makes the user feel a sense of volume.

  Accordingly, it is possible to increase the landing force by increasing the flow rate of the cleaning water 500 without increasing the amount of the cleaning water 500 ejected from the nozzle 410. Therefore, a sufficient feeling of volume can be given with a small flow rate, and a sufficient detergency can be secured. Moreover, since the 1st water discharge 501 lands on the outer peripheral part of the human body local part where it is easy to feel a sense of volume in the vicinity of the human body local part, it can give a sufficient quantity feeling required for butt washing.

  Further, as shown in FIG. 5, the landing force of the first water discharge 501 in the center of the human body local area is smaller than the landing force of the second water discharge 502 in the human body local area, and the water landing force necessary for removing dirt. It is smaller than F2. Therefore, for example, compared with the case where a straight flow flows to the center of the human body local part, it is possible to suppress the strong stimulation from being applied to the central part of the human body local part more than necessary. For example, it is possible to achieve a comfortable buttocks cleaning even for a user who has wrinkles, lacerations, or abrasions caused by excessive wiping.

  As described above with respect to FIGS. 2-4, the second granulated water stream 522 has a smaller particle size and a slower flow rate in the central portion of the human body region compared to the first granulated water stream 521. Land on the water. Therefore, as shown in FIG. 5, the landing force of the second water discharge 502 in the human body local part is smaller than the landing force of the first water discharge 501 in the human body local part. In addition, the landing force of the second water discharge 502 in the human body part is smaller than the landing force F1 that makes the user feel a sense of volume, and is larger than the landing force F2 that is necessary for removing dirt. The range in which the second water discharge 502 lands can generally include a range in which dirt adheres. Thereby, the second water discharge 502 can suppress a strong stimulus from being applied more than necessary to the central portion of the human body local area while ensuring a sufficient cleaning power, and can gently clean a wide range at a time.

Next, a specific example of the nozzle 410 of this embodiment will be described with reference to the drawings.
FIG. 6 is a schematic cross-sectional view illustrating a specific example of the nozzle of this embodiment.
FIG. 7 is a schematic cross-sectional view illustrating a modification of the throat.

  As shown in FIG. 6, the nozzle 410 of this specific example includes a nozzle body (water discharge means) 420 and a throat (liquid film thickness expanding means and crushing means) 430. Inside the nozzle body 420, a nozzle body channel 421 through which cleaning water supplied from a water source (not shown) passes, a swirling chamber 423 capable of generating a swirling flow, and the washing water from the swirling chamber 423 is guided to the throat 430. And a communication path 425 is provided. In addition, a projecting portion 424 that generates a swirling flow with a more stable swirl force is provided at the center of the swirl chamber 423.

  The swirl chamber 423 is formed by a large-diameter inner peripheral wall 423e having a larger diameter at the bottom and an inclined inner peripheral wall 423f having a diameter contracted toward the communication path 425, and is a hollow chamber. The inclined inner peripheral wall 423f is connected to the communication path 425 at one end thereof. On the other hand, the nozzle body channel 421 is eccentrically connected to the swirl chamber 423. More specifically, the nozzle body channel 421 is connected in the tangential direction of the large-diameter inner peripheral wall 423e of the swirl chamber 423.

  The throat 430 is formed in a cylindrical shape. Inside the throat 430, a throat flow path 431 through which cleaning water discharged from the communication passage 425 of the nozzle body 420 passes is provided. Further, at one end of the throat channel 431, a water discharge hole 433 for discharging the cleaning water that has passed through the throat channel 431 to the outside of the throat 430 is formed. The water discharge hole 433 illustrated in FIG. 6 corresponds to the water discharge hole 411 illustrated in FIGS. 1 and 2. In the throat flow path 431 in the vicinity of the water discharge hole 433, a taper portion 432 is formed in which the flow path expands toward the water discharge hole 433.

  In the nozzle 410 of this specific example, a gap is provided between the nozzle body 420 and the throat 430, but this gap is not necessarily provided. That is, the nozzle body 420 and the throat 430 may be integrally formed, and the communication path 425 and the throat flow path 431 may be connected.

  When cleaning water is supplied from a water source (not shown) to the nozzle 410, the cleaning water passes through the nozzle body channel 421 and flows into the swirl chamber 423. Here, since the nozzle body channel 421 is connected in the tangential direction of the large-diameter inner peripheral wall 423e of the swirl chamber 423, the wash water flowing into the swirl chamber 423 flows into the large-diameter inner peripheral wall 423e and the inclined inner peripheral wall 423f. Turn along. Then, the wash water swirled in the swirl chamber 423 passes through the communication path 425 while maintaining the swirl force, and is discharged into the throat flow path 431 of the throat 430 from one end (water discharge port) of the communication path 425. At this time, since the cleaning water discharged from the nozzle body 420 maintains the turning force, it is discharged in a hollow conical shape as a liquid film having a hollow portion at the center.

  The washing water discharged from the nozzle body 420 in a hollow conical shape is received by the inner wall of the throat flow path 431. Subsequently, the wash water that has flowed into the throat flow path 431 flows along the inner wall of the throat flow path 431 while maintaining the turning force, and is guided to the water discharge hole 433. That is, the washing water passing through the throat flow path 431 flows so as to adhere to the inner wall of the throat flow path 431. Therefore, the wash water flowing through the throat flow path 431 receives resistance due to frictional force from the inner wall of the throat flow path 431, and the flow rate of the wash water becomes slower toward the water discharge hole 433. Thus, as shown in FIG. 6, the thickness of the liquid film in the vicinity of the water discharge hole 433 is the thickness of the liquid film when water is discharged from the nozzle body 420 or the liquid immediately after flowing into the throat flow path 431. Thicker than the film thickness. Alternatively, the thickness D2 of the liquid film of the hollow conical water discharge 510 discharged from the water discharge hole 433 is larger than the thickness D1 of the liquid film of the hollow conical water discharge discharged from the nozzle body 420. That is, in this specific example, the nozzle body 420 functions as the water discharge means 401 described above with reference to FIG.

  Further, the flow rate of the washing water flowing through the throat flow path 431 is faster in the center of the throat flow path 431 than in the vicinity of the inner wall of the throat flow path 431, that is, the boundary layer. That is, the throat 430 can make the flow rate of the cleaning water flowing near the inner wall of the throat flow channel 431 different from the flow rate of the cleaning water flowing nearer the center than the vicinity of the inner wall of the throat flow channel 431. . In other words, the throat 430 includes a flow outside the cleaning water liquid film (on the inner wall side of the throat flow path 431), a flow inside the cleaning water liquid film (on the central part side of the throat flow path 431), A speed difference can be made between the two. This is because the cleaning water outside the liquid film (on the inner wall side of the throat flow path 431) has a larger frictional force than the cleaning water inside the liquid film (on the central portion side of the throat flow path 431). This is because it is slower than the inner cleaning water by receiving from the inner wall.

  Therefore, a vortex is generated in the direction crossing the liquid film as indicated by an arrow A1 in FIG. 6 in the wash water flowing through the throat flow path 431. In addition, the throat flow path 431 in the vicinity of the water discharge hole 433 is formed with a tapered portion 432 whose flow path expands toward the water discharge hole 433, and thus the cleaning water discharged from the water discharge hole 433 is the tapered portion 432. Flowing along. Therefore, eddy currents are more likely to occur in the direction crossing the liquid film in the wash water discharged from the water discharge holes 433.

  Then, the wash water discharged from the water discharge hole 433 is discharged as a liquid film having a hollow portion at the center, that is, as the hollow conical water discharge 510, but to the granulated water flow 520 at a position somewhat away from the water discharge hole 433. Transition. More specifically, since a vortex flow is generated in the hollow conical water discharge 510 discharged from the water discharge hole 433 in a direction crossing the liquid film, it is adjacent to the water discharge hole 433 at a certain distance. Cracks occur between the vortex flows. Then, the hollow conical water discharge 510 discharged from the water discharge hole 433 is crushed at a position somewhat away from the water discharge hole 433 as shown in FIG. Thus, the hollow conical water discharge 510 discharged from the water discharge hole 433 transitions to the granulated water flow 520. That is, the throat 430 of this specific example functions as the liquid film thickness enlargement unit 402 and also functions as a crushing unit.

  Note that the crushing means is not limited to the throat 430. For example, the crushing means may have a fluid ejecting device (not shown) that can generate a liquid flow or an airflow. A fluid ejecting apparatus (not shown) can eject a liquid flow or an airflow from an ejection hole (not shown) and collide with a hollow conical water discharge 510 discharged from the water discharge hole 433. In this way, the hollow conical water discharge 510 discharged from the water discharge hole 433 may be crushed by the liquid flow or air flow injected from the injection hole and may be changed to the granulated water flow 520.

  When the spiral groove 435 is formed on the inner wall of the throat channel as in the modification shown in FIG. 7, the washing water flowing through the throat channel receives a greater resistance from the spiral groove 435. . More specifically, the washing water flowing through the throat channel is larger on the outflow side (water discharge hole 433 side) of the throat channel than the inflow side (side of the communication channel 425 of the nozzle body 420) of the throat channel. Receive resistance. And the speed of the swirl component of the wash water flowing through the throat flow path is maintained, and the speed of the straight traveling component is reduced.

  According to this, the wash water that has flowed into the throat flow path is gradually decelerated on the inflow side of the throat flow path, and is decelerated all at once on the outflow side of the throat flow path. Therefore, the washing water discharged from the nozzle body 420 and flowing into the throat flow path can be prevented from being granulated by receiving a larger resistance when the speed is higher or receiving an impact. Therefore, in this modification, it is possible to decelerate more stably while maintaining the cleaning water flowing through the throat flow path in a liquid film state. Thereby, the thickness of a liquid film can be expanded more reliably.

  In addition, the contact time between the cleaning water flowing through the throat flow path and the spiral groove 435 is longer than when the spiral groove 435 is not provided. Therefore, in this modification, the wash water flowing through the throat flow channel receives frictional force from the spiral groove 435 for a longer time than when the spiral groove 435 is not provided. As a result, the speed difference between the flow outside the cleaning water liquid film (the inner wall side of the throat flow path) and the flow inside the cleaning water liquid film (the center side of the throat flow path) is It is larger than the case where the spiral groove 435 is not provided.

  Therefore, the thickness of the liquid film of the cleaning water flowing through the throat flow path of this modification is larger than the thickness of the liquid film of the cleaning water flowing through the throat flow path 431 of the specific example shown in FIG. That is, by forming the spiral groove 435 on the inner wall of the throat channel, the thickness of the liquid film near the water discharge hole 433 or the thickness D2 of the liquid film of the hollow conical water discharge 510 discharged from the water discharge hole 433 is obtained. Can be made thicker.

Next, the pulsation generating means will be described with reference to the drawings.
FIG. 8 is a schematic cross-sectional view illustrating the internal structure of the pulsation generating means of this embodiment.
The sanitary washing device 100 according to this embodiment includes pulsation generating means (crushing position changing means) 470. The pulsation generating means 470 can alternately discharge the first water discharge 501 and the second water discharge 502. Moreover, the pulsation generating means 470 can periodically change the crushing position of the liquid film of the hollow conical water discharge 510.

  Specifically, the pulsation generating means 470 can pulsate the flow of water in the nozzle body channel 421 and pulsate the wash water discharged from the water discharge hole 433. Here, “pulsation” in the present specification refers to fluctuations in pressure generated by the pulsation generating means 470. Therefore, the pulsation generating means 470 is a device that varies the pressure of water in the nozzle body channel 421.

  As shown in FIG. 8, the pulsation generating means 470 is provided in a cylinder 471 connected to the nozzle main body flow path 421, a plunger 472 provided in the cylinder 471 so as to freely advance and retreat, and in the plunger 472. It includes a check valve 473 and a pulsation generating coil 474 that moves the plunger 472 back and forth by controlling the excitation voltage.

  When the position of the plunger 472 changes to the nozzle 410 side (downstream side), the pressure of water downstream from the pulsation generating means 470 increases, and the side opposite to the nozzle 410 (upstream side). In the case of changing to, a check valve is arranged so that the pressure of water downstream from the pulsation generating means 470 decreases. In other words, when the position of the plunger 472 changes to the nozzle 410 side (downstream side), the pressure of water upstream from the pulsation generating means 470 decreases, and the side opposite to the nozzle 410 (upstream side). ), The water pressure upstream of the pulsation generating means 470 increases.

  Then, by controlling the excitation of the pulsation generating coil 474, the plunger 472 is advanced and retracted upstream and downstream. That is, when pulsation is added to the water in the nozzle main body flow path 421 (when the pressure of the water in the nozzle main body flow path 421 is changed), by controlling the excitation voltage supplied to the pulsation generating coil 474, The plunger 472 is moved back and forth in the axial direction (upstream / downstream) of the cylinder 471.

  In this case, the plunger 472 moves from the illustrated original position (plunger original position) to the downstream side 475 by excitation of the pulsation generating coil 474. When the excitation of the pulsation generating coil 474 disappears, the pulsation generating coil 474 returns to the original position by the urging force of the return spring 476. At this time, the return movement of the plunger 472 is buffered by the buffer spring 477. The plunger 472 has a duckbill type check valve 473 in the inside thereof, and prevents backflow to the upstream side.

  Therefore, when the plunger 472 moves from the plunger original position to the downstream side, the water in the cylinder 471 is pressurized and can be pushed into the nozzle body channel 421 on the downstream side. In other words, when the plunger 472 moves from the plunger original position to the downstream side, the water in the nozzle body channel 421 on the upstream side can be decompressed and sucked into the cylinder 471. At this time, since the plunger original position and the position moved downstream are always constant, the amount of washing water sent to the downstream nozzle body channel 421 is constant when the plunger 472 operates.

  Thereafter, when returning to the original position, the washing water flows into the cylinder 471 through the check valve 473. Therefore, in the next movement of the plunger 472 on the downstream side, a certain amount of washing water is sent again to the downstream nozzle body channel 421. In this way, the pulsation generating means 470 shown in FIG. 8 can pulsate the flow of water in the nozzle main body flow path 421.

Next, the relationship between the operation of the pulsation generating means and the flow rate of water will be described with reference to the drawings. FIG. 9 is a graph illustrating the voltage waveform applied to the pulsation generating means and the flow velocity waveform of water downstream of the pulsation generating means.
FIG. 9A is a graph illustrating voltage waveforms applied to the pulsation generating means of this embodiment. FIG. 9B is a graph illustrating the flow velocity waveform of water on the downstream side of the pulsation generating means of this embodiment.

  As described above with reference to FIG. 8, by controlling the excitation voltage supplied to the pulsation generating coil 474, the plunger 472 can be driven to add pulsation to the water in the nozzle body channel 421. The frequency (1 / T1) of the waveform of the voltage supplied to the pulsation generating coil 474 is about 70 Hz, for example. The maximum value of the time t1 for supplying the voltage is, for example, about 3.25 milliseconds (ms). Therefore, the maximum value of the duty ratio of the waveform of the voltage supplied to the pulsation generating coil 474 is, for example, about 23.2%.

  First, when the supply of voltage to the pulsation generating coil 474 is stopped, the plunger 472 moves upstream, and the pressure of water downstream of the pulsation generating means 470 decreases. For this reason, the flow rate of water downstream of the pulsation generating means 470 decreases as indicated by the flow rates V1 to V2 shown in FIG. Then, the flow rate of the liquid film of the hollow conical water discharge 510 discharged from the water discharge hole 411 decreases. Thereby, the flow rate of the liquid film of the hollow conical water discharge 510 becomes faster as the distance from the water discharge hole 411 increases. That is, there is a flow rate difference between the liquid film of the hollow conical water discharge 510 present at a position relatively far from the water discharge hole 411 and the liquid film of the hollow conical water discharge 510 present at a position relatively close to the water discharge hole 411. Arise. Due to this flow rate difference, the liquid film of the hollow conical water spouting 510 is in a state of being thinly stretched.

  According to this, at the initial stage where the flow rate of water changes from the flow rate V1 to the flow rate V2, the liquid film of the hollow conical water discharge 510 is located farther from the water discharge hole 411 than when there is no pressure fluctuation by the pulsation generating means 470. It is crushed. Since the hollow conical water discharge 510 having a thin liquid film transitions to the granulated water stream 520 at a high flow rate at a position far from the water discharge hole 411, a granulated water stream 520 having a smaller particle size and a higher flow speed is generated. Is done.

  Subsequently, at the final stage in which the flow rate of water changes from the flow rate V1 to the flow rate V2, the liquid film of the hollow conical water discharge 510 is crushed at a position closer to the water discharge hole 411 than when there is no pressure fluctuation by the pulsation generating means 470. The Since the hollow conical water discharge 510 having a thin liquid film transitions to the granulated water flow 520 at a low flow rate at a position close to the water discharge hole 411, a granulated water flow 520 having a smaller particle size and a slower flow rate is generated. Is done. The granulated water flow at this time corresponds to the second granulated water flow 522 described above with reference to FIGS. That is, the wash water discharged at the final stage where the flow rate of water changes from the flow rate V 1 to the flow rate V 2 corresponds to the second discharged water 502.

  On the other hand, when the supply of voltage to the pulsation generating coil 474 is started, the plunger 472 moves downstream, and the pressure of water downstream from the pulsation generating means 470 increases. Therefore, the flow rate of water on the downstream side of the pulsation generating unit 470 increases as in the flow rate V3 to the flow rate V4 illustrated in FIG. And the flow rate of the liquid film of the hollow conical water discharge 510 discharged from the water discharge hole 411 increases. Thereby, the flow rate of the liquid film of the hollow conical water discharge 510 becomes slower as the distance from the water discharge hole 411 increases. That is, there is a flow rate difference between the liquid film of the hollow conical water discharge 510 present at a position relatively far from the water discharge hole 411 and the liquid film of the hollow conical water discharge 510 present at a position relatively close to the water discharge hole 411. Arise. Due to this difference in flow velocity, the thickness of the liquid film of the hollow conical water discharge 510 becomes thicker as the distance from the water discharge hole 411 increases.

  According to this, in the initial stage in which the flow rate of water changes from the flow rate V3 to the flow rate V4, acceleration of crushing due to the flow rate difference inside the liquid film is added, and the liquid film of the hollow conical water discharge 510 is caused by the pulsation generating means 470. It is crushed at a position closer to the water discharge hole 411 than when there is no pressure fluctuation. Since the hollow conical water discharge 510 with a thick liquid film transitions to the granulated water stream 520 at a low flow rate at a position close to the water discharge hole 411, a granulated water stream 520 having a smaller particle size and a slower flow rate is generated. Is done.

  Subsequently, in the final stage where the flow rate of water changes from the flow rate V3 to the flow rate V4, the liquid film of the hollow conical water discharge 510 is crushed at a position farther from the water discharge hole 411 than when there is no pressure fluctuation by the pulsation generating means 470. The Since the hollow conical water discharge 510 having a thick liquid film transitions to the granulated water stream 520 at a high flow rate at a position far from the water discharge hole 411, a granulated water stream 520 having a larger particle size and a faster flow rate is generated. Is done. The granulated water flow at this time corresponds to the first granulated water flow 521 described above with reference to FIGS. That is, the wash water discharged at the final stage where the flow rate of water changes from the flow rate V3 to the flow rate V4 corresponds to the first discharged water 501.

  In this way, the pulsation generating means 470 can change the flow rate of the cleaning water 500 discharged from the water discharge hole 411. Moreover, the pulsation generating means 470 can alternately discharge the first water discharge 501 having ring-shaped water discharge and the second water discharge 502 having solid water discharge. Moreover, the pulsation generating means 470 can periodically change the crushing position of the liquid film of the hollow conical water discharge 510.

FIG. 10 is a graph illustrating the velocity distribution of particles passing near the landing position.
The present inventor has found that when the pulsation generating means 470 pulsates the flow of water in the nozzle body channel 421, the velocity distribution of particles (droplets or granulated water flow) passing near the landing position, and the pulsation When the generation means 470 does not pulsate the flow of water in the nozzle main body channel 421, the velocity distribution of particles passing near the landing position was measured. The amount of water supplied to the pulsation generating means 470 was constant at about 430 cc / min regardless of the presence or absence of pulsation. An example of the result is as shown in FIG.

  As shown in FIG. 10, the velocity distribution when the pulsation generating means 470 pulsates the flow of water in the nozzle main body flow path 421 indicates that the pulsation generating means 470 corresponds to the flow of water in the nozzle main body flow path 421. More spread than the velocity distribution when no pulsation is applied. In other words, the velocity distribution when the pulsation generating means 470 does not pulsate the water flow in the nozzle main body flow path 421 is the speed distribution when the pulsation generating means 470 pulsates the water flow in the nozzle main body flow path 421. Compared with the velocity distribution in FIG. Thereby, when the pulsation generating means 470 pulsates the flow of water in the nozzle main body flow path 421, compared with the case where the pulsation generating means 470 does not pulsate the flow of water in the nozzle main body flow path 421, It can be seen that a granulated water stream 520 having a faster flow rate and a granulated water stream 520 having a slower flow rate can be produced.

  Here, the velocity distribution in the case where the pulsation generating means 470 pulsates the flow of water in the nozzle main body flow path 421 is obtained when the space occupancy of the droplet is high and when the space occupancy of the droplet is low. Disassemble with. Then, as shown in FIG. 10, the peak of the velocity distribution when the space occupancy rate of the droplet is high exists on the side where the flow velocity is faster than the peak of the velocity distribution when the space occupancy rate of the droplet is low. As used herein, “space occupancy” refers to the ratio or ratio of volume occupied by droplets per unit volume. That is, the space occupancy of the droplets can be changed by changing the velocity distribution of the droplets by the pulsation generating means 470. This will be further described.

FIG. 11 is a graph illustrating the space occupation ratio of particles passing near the landing position.
As described above with reference to FIG. 9, the pulsation generating means 470 can change the flow rate of the liquid film of the hollow conical water discharge 510 and the flow rate of the granulated water flow 520. As described above with reference to FIG. 10, the pulsation generating means 470 changes the flow rate of the liquid film of the hollow conical water spouting 510 and the flow rate of the granulated water flow 520 to thereby change the space occupancy rate of particles passing near the landing position. Can be changed. Thereby, the pulsation generating means 470 can change the amount of water at the landing position.

  This inventor measured the time transition of the space occupation rate of the particle | grains which pass the vicinity of a landing position. An example of the result is as shown in FIG. When the water flow of the cleaning water 500 ejected from the nozzle 410 is “water force 4” and “water force 5”, the pulsation generating means 470 pulsates the flow of water in the nozzle body channel 421. The frequency of the waveform of the voltage supplied to the pulsation generating coil 474 is about 70 Hz when “water force 4” and “water force 5”. The duty ratio of the waveform of the voltage supplied to the pulsation generating coil 474 is about 13.3% when “water force 4”, and about 23.2% when “water force 5”.

  On the other hand, when the water flow of the cleaning water 500 ejected from the nozzle 410 is “water power 3”, the pulsation generating means 470 does not pulsate the flow of water in the nozzle main body flow path 421. The amount of water supplied to the pulsation generating means 470 was constant at about 430 cc / min regardless of the presence or absence of pulsation. In other words, the duty ratio of the waveform of the voltage supplied to the pulsation generating coil 474 in “water force 4” and “water force 5” is different from each other, and the frequency of the waveform of the voltage supplied to the pulsation generating coil 474 and the pulsation generating means 470 are supplied. The amount of water used is the same.

  As shown in FIG. 11, the pulsation generating means 470 pulsates the flow of water in the nozzle body flow path 421, so that the space occupancy of particles passing near the landing position is high and low. And can be generated alternately. A state where the space occupancy of the particles passing through the vicinity of the landing position is high is, for example, as shown in an insertion photograph P1 shown in FIG. In the inset photograph P1 shown in FIG. 11, particles flow from the left side to the right side of the inset picture P1. On the other hand, the state where the space occupancy of the particles passing through the vicinity of the landing position is low is, for example, as shown in the inserted photograph P2 shown in FIG. In the inset photograph P2 shown in FIG. 11, particles flow from the left side to the right side of the inset picture P2.

  As described above with reference to FIG. 10, the peak of the velocity distribution when the space occupancy of the droplet is high exists on the side where the flow velocity is faster than the peak of the velocity distribution when the space occupancy of the droplet is low. Therefore, the pulsation generating means 470 can realize a state in which the space occupation rate of particles passing near the landing position is high by increasing the flow rate of the liquid film of the hollow conical water discharge 510 and the flow rate of the granulated water flow 520. . On the other hand, the pulsation generating means 470 can realize a state in which the space occupancy of particles passing near the landing position is low by slowing the flow rate of the liquid film of the hollow conical water discharge 510 and the flow rate of the granulated water flow 520. .

  As described above with reference to FIG. 9, the wash water discharged at the final stage in which the flow rate of water increases corresponds to the first discharged water 501. Therefore, the insertion photograph P1 shown in FIG. 11 represents the first water discharge 501, for example. On the other hand, the wash water discharged at the final stage where the flow rate of water decreases corresponds to the second discharged water 502. Therefore, the insertion photograph P <b> 2 illustrated in FIG. 11 represents, for example, the second water discharge 502.

  According to this, the water volume of the first water discharge 501 (or the first water flow group 521a) at the water landing position (for example, the human body local area) is equal to the second water discharge 502 (or the second water discharge at the water landing position (for example, the human body local area)). More than the amount of water in the water flow group 522a). Therefore, the first water discharge 501 can give a sufficient sense of volume required for the butt washing.

  As shown in FIG. 11, the pulsation generating means 470 can make the particle space occupancy when “water force 4” different from the particle space occupancy when “water force 5”. . That is, by changing the duty ratio of the waveform of the voltage supplied to the pulsation generating coil 474 without changing the frequency of the waveform of the voltage supplied to the pulsation generating coil 474 and the amount of water supplied to the pulsation generating means 470, The space occupancy of the particles can be changed. In other words, by changing the duty ratio of the waveform of the voltage supplied to the pulsation generating coil 474, for example, as shown in the inserted photograph P1 and the inserted photograph P2 shown in FIG. be able to.

12 and 13 are photographic diagrams showing the state of the cleaning water discharged from the nozzle of the present embodiment.
The inventor has photographed the state of the cleaning water discharged from the nozzle 410 every 1/8 period of the waveform of the voltage applied to the pulsation generating means 470. 12 (a) to 12 (e) and FIGS. 13 (a) to 13 (d) are obtained by arranging those photographs in order of time.

  In the state shown in FIG. 12A, the liquid film of the hollow conical water discharge 510 is relatively thin. For this reason, the liquid film of the hollow conical water discharge 510 is crushed at a position relatively close to the water discharge hole 411 and transitions to droplets having a relatively small diameter. As indicated by the arrows shown in FIG. 12A, the length of the liquid film of the hollow conical water discharge 510 is relatively short. That is, the 2nd water discharge 502 is produced | generated in the state represented to Fig.12 (a). Then, the liquid film of the second hollow conical water spouting 512 is crushed and transitioned to the second granulated water flow 522 within the solid line shown in FIG.

  Subsequently, as shown in FIGS. 12B to 12D, the second granulated water flow 522 (or the second water flow group 522a) generated in FIG. Progressing towards. Further, the length of the liquid film of the hollow conical water discharge 510 is gradually extended. The landing position is a position separated from the water discharge hole 411 by, for example, about 40 millimeters (mm) to 60 mm. The water landing position shown in FIGS. 12 and 13 is a position about 40 mm away from the water discharge hole 411.

  Subsequently, in the state shown in FIG. 12E, the liquid film of the hollow conical water discharge 510 is relatively thick. For this reason, the liquid film of the hollow conical water discharge 510 is crushed at a position relatively far from the water discharge hole 411 and transitions to droplets having a relatively large diameter. As indicated by the arrow shown in FIG. 12E, the length of the liquid film of the hollow conical water discharge 510 is relatively long. That is, the 1st water discharge 501 is produced | generated in the state represented to FIG.12 (e). Then, the liquid film of the first hollow conical water discharge 511 is crushed and transitioned to the first granulated water flow 521 within the encircled line of the broken line shown in FIG.

  At this time, the second granulated water flow 522 in the solid line has almost reached the landing position. Therefore, although the flow rate of the first granulated water flow 521 is faster than the flow rate of the second granulated water flow 522, as shown in FIG. After the granulated water stream 522 has passed through the landing position, the first granulated water stream 521 within the dashed box line has reached the landing position.

  Subsequently, as shown in FIG. 13B, the first granulated water flow 521 in the broken line encloses the second granulated water flow 522 in the solid line after passing through the landing position. I'm catching up. That is, the first granulated water stream 521 (or the first water stream group 521a) does not overtake the second granulated water stream 522 (or the second water stream group 522a) before reaching the landing position.

  Subsequently, as illustrated in FIG. 13C and FIG. 13D, the first granulated water flow 521 and the second granulated water flow 522 further proceed. Then, the state of the cleaning water 500 discharged from the nozzle 410 returns to the state shown in FIG.

  Thus, in this embodiment, before the 1st granulated water stream 521 (or 1st water stream group 521a) arrives at a landing position, the 2nd granulated water stream 522 (or 2nd water stream group 522a). Never overtake. That is, the first granulated water stream 521 (or the first water stream group 521a) and the second granulated water stream 522 (or the second water stream group 522a) alternately land on the human body part. Therefore, it is possible to make the user feel as continuous water discharge in which the hollow portion is not hollow. In addition, it is possible to give a feeling of volume with a small flow rate, and it is possible to clean a wide range gently at once.

The embodiment of the present invention has been described above. However, the present invention is not limited to these descriptions. As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention. For example, the shape, size, material, arrangement, etc. of each element provided in the water discharging means 401, the liquid film thickness expanding means 402, the crushing means, the pulsation generating means 470, etc., and the installation form of the nozzle 410, the nozzle body 420, and the throat 430, etc. However, the present invention is not limited to those illustrated, and can be appropriately changed.
Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

  DESCRIPTION OF SYMBOLS 100 Sanitary washing apparatus, 200 Toilet seat, 300 Toilet lid, 400 Casing, 401 Water discharge means, 402 Liquid film thickness expansion means, 404 Seating detection sensor, 410 Nozzle, 411 Water discharge hole, 420 Nozzle main body, 421 Nozzle main body flow path, 423 Rotating chamber, 423e large-diameter inner peripheral wall, 423f inclined inner peripheral wall, 424 projecting portion, 425 communication path, 430 throat, 431 throat flow path, 432 tapered portion, 433 water discharge hole, 435 spiral groove, 470 pulsation generating means, 471 Cylinder, 472 plunger, 473 check valve, 474 pulsation generating coil, 475 downstream side, 476 return spring, 477 buffer spring, 500 washing water, 501 first water discharge, 502 second water discharge, 510 hollow conical water discharge, 511 First hollow cone Water discharge, 512 second conical water discharge, 520 granulated water stream, 521 first granulated water stream, 521a first water stream group, 522 second granulated water stream, 522a second water stream group, 800 toilet bowl, 801 bowl

Claims (4)

A sanitary washing device that performs washing by discharging the washing water from the nozzle spout to the local body part,
Water discharging means for discharging cleaning water in a hollow conical shape from the water discharge hole;
Before the washing water discharged in the hollow conical shape from the water discharge hole reaches the human body local part, a granulated water flow is generated by crushing the liquid film of the washing water discharged in the hollow cone shape. And crushing means for pouring the granulated water flow into the hollow portion of the wash water discharged into the hollow cone.
Provided downstream from the water discharge means and upstream from the water discharge hole, and from the water discharge hole to the hollow cone shape rather than the thickness of the liquid film of the washing water discharged in a hollow cone shape from the water discharge means. Means for increasing the liquid film thickness to increase the thickness of the liquid film of discharged wash water;
With
The granulated water stream has a first water stream group, and a second water stream group having a particle size smaller than that of the first water stream group and a flow velocity slower than that of the first water stream group,
The first water stream group and the second water stream group are alternately generated from the granulated water stream, and land on the human body part in an independent state ,
The sanitary washing apparatus according to claim 1, wherein the first water stream group is landed on an outer peripheral portion of the human body local part, and the second water stream group is landed on a central part of the human body local part . The amount of water of the first water flow group claim 1 Symbol placement of the sanitary washing device, characterized in that more than water of the second water flow group in the human private in the human private. The sanitary washing according to claim 1 or 2 , wherein the first water stream group does not pass the second water stream group before the second water stream group reaches the human body part. apparatus. The first water flow group and the second water flow group periodically calculate the length of the liquid film when the liquid film is crushed and the thickness of the liquid film when the liquid film is crushed. The sanitary washing device according to any one of claims 1 to 3 , wherein the sanitary washing device is generated by being changed.