JP5954632B2 - Sanitary washing device - Google Patents

Description

  Aspects of the present invention generally relate to a sanitary washing apparatus, and more specifically, to a sanitary washing apparatus for washing a user's “butt” or the like seated on a Western-style seated toilet with water.

Residential sanitary washing devices and non-residential (public) sanitary washing devices are required to save energy, reduce power consumption, and save water.
In public sites, a plurality of sanitary washing devices are often installed for one electrical wiring or one breaker. Therefore, even if multiple sanitary washing devices are used at the same time, the power consumption per unit time (power consumption) is instantaneous in the public field so that the power consumption does not exceed the allowable power consumption of electrical wiring and breakers. A sanitary washing apparatus having a hot water storage type heat exchanger that is lower than the power consumption of the type heat exchanger is often used.

  However, the amount of heat released during standby of the hot water storage type heat exchanger is larger than the amount of heat released during standby of the instantaneous heat exchanger. Therefore, the total power consumption of the sanitary washing apparatus including the hot water storage type heat exchanger is higher than the total power consumption of the sanitary cleaning apparatus including the instantaneous heat exchanger. There is room for improvement in terms of saving energy or reducing power consumption.

Consider a case where a public sanitary washing apparatus is equipped with an instantaneous heat exchanger in order to save energy or reduce power consumption. When multiple sanitary washing devices with conventional instantaneous heat exchangers are installed on the public site, even if multiple sanitary washing devices are used at the same time, the total power consumption is acceptable for the electrical wiring or breaker. It must be set not to exceed the power. In some cases, there has been a problem that a large cost is required for facility construction, such as changing the electrical wiring or breaker to one having a large allowable power.
On the other hand, if the power consumption of the sanitary washing device is set so that the power consumption does not become higher than the allowable power amount of the breaker even when a plurality of sanitary washing devices are used simultaneously, the temperature raising capability becomes insufficient with respect to the current amount of water. . Therefore, it is necessary to reduce the amount of water. However, when the amount of water is reduced, the width of the changeable water amount or the width of the usable water amount becomes narrow. For this reason, there is a possibility that the water force cannot be adjusted sufficiently only by changing the amount of water.

  On the other hand, there is a sanitary washing device provided with a pump that pressurizes washing water from a water supply source and supplies it to the ejection means (Patent Document 1). The sanitary washing device described in Patent Document 1 adjusts the water flow by changing the fluctuation period of the pump discharge pressure and the fluctuation range of the pump discharge pressure. However, when a driving device such as a pump is provided, there is a problem that the sanitary washing device becomes larger, the structure of the sanitary washing device becomes complicated, and the maintenance work becomes complicated.

JP 2004-92321 A

  The present invention has been made based on recognition of such a problem, and an object thereof is to provide a sanitary washing device capable of changing the water flow without using a driving device such as a pump even when the amount of water is reduced. To do.

1st invention has a water discharging part, the washing nozzle which injects water from the water discharging part and wash | cleans a user's body, the flow path which guides the water supplied from a water supply source to the washing nozzle, An instantaneous heat exchanger provided in the flow path for raising the temperature of water supplied from the water supply source, a flow rate adjusting means provided in the flow path for adjusting the flow rate of water flowing to the cleaning nozzle, and the water discharge An injection form adjusting means for adjusting the injection form of the water injected from the section, an instruction means for instructing a change in the water flow injected from the water discharge section based on a user's operation, and the output from the instruction means If you enter an instruction to change the flow force, the flow rate adjusting means is controlled to the maintaining the flow of water through the instantaneous type heat exchanger constant, the while maintaining the straight flow by controlling the injection mode adjustment means spouting By adjusting the flow rate of water sprayed from the And control means for adjusting the serial flow force, a sanitary washing apparatus comprising the.

  According to this sanitary washing device, the control means changes the water flow by adjusting the flow velocity while keeping the flow rate substantially constant. Therefore, even in a sanitary washing device with a low amount of water, the water pressure can be changed without using a driving device such as a pump. In addition, even when the water flow is changed, the flow rate of water passing through the instantaneous heat exchanger is kept substantially constant, so that variations in the temperature of water heated by the instantaneous heat exchanger are suppressed. Can do.

  According to a second invention, in the first invention, the injection form adjusting means switches the water discharger by switching between a pulsating flow to which a pulsation having a fluctuation in flow velocity is given and a continuous flow to which the pulsation is not given. The sanitary washing device is characterized in that the flow rate of water jetted from the water is adjusted.

  According to this sanitary washing device, the control means adjusts the flow rate of the water ejected from the water discharger by switching the ejection form to either a pulsating flow or a continuous flow. For this reason, the difference in flow rate becomes remarkable even in a sanitary washing apparatus with a low water amount. As a result, the difference in water is significant. This makes it possible to change the water pressure that is satisfactory to the user.

  According to a third invention, in the second invention, the water discharge section includes a first water discharge port for injecting the pulsating flow and a second water discharge port for injecting the continuous flow, and the cleaning nozzle Are connected to the flow path and lead the water to the first water outlet, and are connected to the flow path and connected to the flow path to guide the water to the second water outlet. A flow path for switching the connection destination of the flow path to one of the flow path in the first nozzle and the flow path in the second nozzle. It has a switching unit, and the water discharge unit that jets the water by switching the connection destination by the flow path switching unit is switched to either the first water discharge port or the second water discharge port. This is a sanitary washing device.

  According to this sanitary washing device, the control means can easily switch the injection mode by switching the water discharger for injecting water to either the first water discharge port or the second water discharge port. Therefore, in a sanitary washing device with a low amount of water, the water force can be easily changed.

  According to a fourth invention, in any one of the first to third inventions, when the control means starts jetting the water from the water discharger, a relative flow rate of water jetted from the water discharger is relatively The sanitary washing apparatus is characterized by starting from an injection of the above-described injection form with a fast flow rate.

  According to this sanitary washing device, when starting the cleaning, the control means starts from injection of an injection form having a relatively high flow rate among the flow rates of water injected from the water discharger. Therefore, it is possible to efficiently remove dirt at the start of cleaning.

  According to a fifth invention, in any one of the first to third inventions, when the control means starts jetting the water from the water discharger, a relative flow rate of water jetted from the water discharger is relatively The sanitary washing apparatus is characterized by starting from an injection of the above-mentioned injection form with a slow flow rate.

  According to this sanitary washing device, when starting the cleaning, the control means starts from injection of an injection form having a relatively slow flow rate among the flow rates of water injected from the water discharger. For this reason, it is possible to reduce the scattering of water at the start of cleaning.

  According to the aspect of the present invention, there is provided a sanitary washing device capable of changing the water flow without using a driving device such as a pump even when the amount of water is reduced.

It is a typical perspective view showing the toilet apparatus provided with the sanitary washing apparatus concerning embodiment of this invention. It is a block diagram showing the principal part structure of the sanitary washing apparatus concerning this embodiment. It is a table | surface which illustrates the washing | cleaning form which the washing nozzle of this embodiment injects. It is a graph which illustrates the specific example of the control action of this embodiment. It is a typical top view which illustrates the example of the operation part of this embodiment. It is a schematic plan view showing the water discharge state (injection state) of the pulsating flow of this embodiment. It is a schematic diagram explaining the pulsating flow of this embodiment. It is a schematic diagram explaining the pulsating flow of this embodiment. It is a schematic diagram explaining the pulsating flow of this embodiment. It is a schematic diagram explaining the pulsating flow of this embodiment. It is a schematic diagram explaining the pulsating flow of this embodiment. It is a schematic diagram explaining the pulsating flow of this embodiment. It is typical sectional drawing showing the washing nozzle which injects the foam flow of this embodiment. It is typical sectional drawing showing the washing nozzle which injects the mist flow of this embodiment. It is typical sectional drawing showing the washing nozzle which injects the revolution discharge water flow of this embodiment. It is a schematic diagram which illustrates an example of the state of a revolution spouting water flow. It is typical sectional drawing showing the washing nozzle which injects the swirl | vortex flow of this embodiment. It is typical sectional drawing showing the circular chamber inside a washing nozzle. It is typical sectional drawing showing the other washing nozzle which injects the swirl | vortex flow of this embodiment. It is a typical exploded view showing the other washing nozzle which injects the swirl flow of this embodiment. It is a typical perspective view showing the other washing nozzle which injects the swirl flow of this embodiment. It is typical which represents the other washing nozzle which injects the swirl | vortex flow of this embodiment. It is a typical top view showing the washing nozzle which injects the dispersed jet of this embodiment. It is typical sectional drawing in cut surface JJ represented to FIG. It is a schematic diagram showing the washing nozzle which injects the fan-shaped water flow of this embodiment. It is a schematic diagram showing the washing nozzle which injects the fan-shaped water flow of this embodiment. It is a typical top view showing the state where the washing nozzle of this embodiment sprays. It is a schematic diagram showing the washing nozzle which sprays and sprays 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.
FIG. 2 is a block diagram showing a main configuration of the sanitary washing device according to the present embodiment.
In addition, FIG. 2 represents together the principal part structure of the waterway system and the electrical system.

  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. Note that the toilet lid 300 is not necessarily provided.

  Inside the casing 400 is incorporated a body washing function unit that implements washing of a user who sits on the toilet seat 200 such as a “butt”. 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 (instruction means) 500 such as a remote controller, the cleaning nozzle 473 moves into the bowl 801 of the toilet 800. Can be made. In the sanitary washing apparatus 100 shown in FIG. 1, the washing nozzle 473 has entered the bowl 801.

A water discharge portion 474 is provided at the tip of the cleaning nozzle 473. The washing nozzle 473 can wash water from a water discharge portion 474 provided at the tip of the nozzle so as to wash the “buttock” of the user sitting on the toilet seat 200. In the present specification, the term “water” includes not only cold water but also warm hot water.
The water discharge part 474 has the 1st water discharge port 474a, the 2nd water discharge port 474b, and the 3rd water discharge port 474c. The cleaning mode (injection mode) ejected by the first water outlet 474a is different from the cleaning mode (injection mode) ejected by the second water outlet 474b and the third water outlet 474c, respectively. The cleaning mode ejected by the second water outlet 474b is different from the cleaning mode ejected by the third water outlet 474c. This will be described later. Note that the number of water outlets provided in the water discharger 474 is not limited to three.

  As shown in FIG. 2, the sanitary washing device 100 according to the present embodiment includes a flow path 20 that guides water supplied from a water supply source 10 such as a water supply or a water storage tank to a water discharge unit 474 of the washing nozzle 473. An electromagnetic valve 431 is provided on the upstream side of the flow path 20. The electromagnetic valve 431 is an electromagnetic valve that can be opened and closed, and controls the supply of water based on a command from a control unit (control means) 405 provided inside the casing 400.

  A heat exchanger unit 440 is provided downstream of the electromagnetic valve 431. The heat exchanger unit 440 includes a hot water heater, and heats the water supplied from the water supply source 10 to raise the temperature to, for example, a specified temperature. The heat exchanger unit 440 of the present embodiment is an instantaneous heating (instantaneous) heat exchanger using, for example, a ceramic heater. The user can set the hot water temperature by operating the operation unit 500.

  An electrolytic cell unit 450 capable of generating sterilizing water is provided downstream of the heat exchanger unit 440. The cleaning nozzle 473 and the flow path 20 on the downstream side of the electrolytic cell unit 450 are sterilized by the sterilizing water generated in the electrolytic cell unit 450. However, the electrolytic cell unit 450 is not necessarily provided.

  Downstream of the heat exchanger unit 440 or the electrolytic cell unit 450, a flow rate switching valve (flow rate adjusting means) 471 for adjusting the flow rate, opening / closing of water supply to the cleaning nozzle 473 and the nozzle cleaning chamber 478, and switching of the water supply destination are switched. And a flow path switching valve (flow path switching means: injection mode adjusting means) 472 to be performed. The injection form adjusting means has a flow path switching valve 472. The flow rate switching valve 471 adjusts the flow rate of water flowing through the cleaning nozzle 473. The flow path switching valve 472 can switch the water supply destination (flow path connection destination) to either the cleaning nozzle 473 or the nozzle cleaning chamber 478. The flow rate switching valve 471 and the flow path switching valve 472 may be provided as one unit.

  A cleaning nozzle 473 is provided downstream of the flow rate switching valve 471 and the flow path switching valve 472. Inside the cleaning nozzle 473, a first in-nozzle passage 21, a second in-nozzle passage 22, and a third in-nozzle passage 23 are provided. The first in-nozzle channel 21 guides water to the first water outlet 474a. The second in-nozzle channel 22 guides water to the second water outlet 474b. The third in-nozzle channel 23 guides water to the third water outlet 474c. The flow path switching valve 472 switches the water supply destination (flow path connection destination) to any of the first nozzle internal flow path 21, the second nozzle internal flow path 22, and the third nozzle internal flow path 23. it can. In other words, the flow path switching valve 472 supplies water to the first nozzle flow path 21, the second nozzle flow path 22, the third nozzle flow path 23, and the nozzle cleaning chamber 478. You can switch to either.

  In the case where four or more water outlets are provided, nozzle flow paths corresponding to the respective water outlets are provided inside the cleaning nozzle 473. The flow path switching valve 472 can switch the water supply destination to any of a plurality of nozzle flow paths provided inside the cleaning nozzle 473.

  The cleaning nozzle 473 receives driving force from the nozzle motor 476 and can advance into the bowl 801 of the toilet bowl 800 or retreat into the casing 400. That is, the nozzle motor 476 can move the cleaning nozzle 473 forward and backward based on a command from the control unit 405.

  The nozzle cleaning chamber 478 can sterilize or clean the outer peripheral surface (body) of the cleaning nozzle 473 by spraying sterilizing water or water from a water discharge unit (not shown) provided therein. Alternatively, the nozzle cleaning chamber 478 can sterilize or clean the portion of the water discharger 474 of the cleaning nozzle 473 in the housed state.

  The control unit 405 is supplied with electric power from the power supply circuit 401 and is used in front of the toilet seat 200 or the entrance detection sensor 402 for detecting the user's entry into the toilet room (a private room of the toilet booth in the case of public use). Based on signals from a human body detection sensor 403 that detects a person, a seating detection sensor 404 that detects a user's seating on the toilet seat 200, an operation unit 500, and the like, an electromagnetic valve 431, a heat exchanger unit 440, The operation of the electrolytic cell unit 450, the flow rate switching valve 471, the flow path switching valve 472, and the nozzle motor 476 can be controlled.

  The seating detection sensor 404 can detect a human body existing above the toilet seat 200 immediately before the user sits on the toilet seat 200 or a user seated on the toilet seat 200. In other words, the seating detection sensor 404 can detect not only a user seated on the toilet seat 200 but also a user existing above the toilet seat 200. As such a seating detection sensor 404, for example, an infrared light emitting / receiving distance measuring sensor or the like can be used.

  The human body detection sensor 403 can detect a user in front of the toilet bowl 800, that is, a user present at a position spaced forward from the toilet seat 200. That is, the human body detection sensor 403 can detect a user who enters the toilet room and approaches the toilet seat 200. As such a human body detection sensor 403, for example, an infrared light projecting / receiving distance measuring sensor or the like can be used.

  The entrance detection sensor 402 can detect a user immediately after opening a toilet room door or entering a toilet room and a user existing in front of the door trying to enter the toilet room. That is, the entrance detection sensor 402 can detect not only a user who has entered the toilet room, but also a user before entering the toilet room, that is, a user existing in front of the door outside the toilet room. As such a room entry detection sensor 402, a pyroelectric sensor, a microwave sensor such as a Doppler sensor, or the like can be used. When using a sensor that uses the microwave Doppler effect or a sensor that detects the object to be detected based on the amplitude (intensity) of the microwave transmitted and reflected, the user's The presence can be detected. That is, the user before entering the toilet room can be detected.

  In the toilet apparatus shown in FIG. 1, a recessed portion 409 is formed on the upper surface of the casing 400, and the entrance detection sensor 402 is provided so that a part of the recessed portion 409 is embedded. In the state where the toilet lid 300 is closed, the entrance detection sensor 402 detects the entrance of the user through the transmission window 310 provided near the base. For example, when the room entry detection sensor 402 detects a user, the control unit 405 can automatically open the toilet lid 300 based on the detection result of the room entry detection sensor 402. In addition, the seating detection sensor 404 and the human body detection sensor 403 are provided in a central portion in front of the casing 400. However, the installation form of the seating detection sensor 404, the human body detection sensor 403, and the entrance detection sensor 402 is not limited to this, and can be changed as appropriate.

  The casing 400 has various mechanisms such as a “warm air drying function”, a “deodorizing unit”, and an “indoor heating unit” for drying by blowing warm air toward a “buttock” of a user sitting on the toilet seat 200. It may be provided as appropriate. At this time, an exhaust port 407 from the deodorizing unit and an exhaust port 408 from the indoor heating unit are appropriately provided on the side surface of the casing 400. However, additional function parts such as a deodorizing unit and an indoor heating unit are not necessarily provided.

Next, a cleaning mode (injection mode) sprayed by the cleaning nozzle 473 of this embodiment will be described with reference to the drawings.
FIG. 3 is a table illustrating a cleaning form sprayed by the cleaning nozzle of the present embodiment.

  The cleaning nozzle 473 of this embodiment can inject a straight flow and a dispersed flow from the water discharger 474, respectively. For example, the cleaning nozzle 473 can eject a pulsating flow from the first water outlet 474a as a straight flow. For example, the washing nozzle 473 can inject a foam flow (air mixed flow: continuous flow) from the second water outlet 474b as a straight flow. For example, the cleaning nozzle 473 can eject a mist-like water flow (mist flow) from the third water outlet 474c as a dispersed flow. The positions of the first water outlet 474a, the second water outlet 474b, and the third water outlet 474c are not limited to the positions shown in FIG. 1, and may be changed as appropriate.

The pulsating flow is a water flow in which the flow rate of the discharged water is changed without using a pressure fluctuation device such as a pump, for example, and is a water flow of water bodies that appears periodically. Alternatively, the pulsating flow is a water flow in which a pulsation is given to the water flow, and the water flow state in which the flow state of the water periodically changes or the water landing force on the human body periodically changes.
The foam flow is a water flow in which bubbles are mixed. There is no pulsation in the foam flow. The foam flow is a continuous flow of the straight flow.
The mist flow is, for example, a water flow that is granulated by crushing a liquid film or the like.
Details of each cleaning mode will be described later.

  As shown in the column of “width (landing area)” shown in FIG. 3, the landing area S1 of the pulsating flow is narrower than the landing area S2 of the foam flow and the landing area S3 of the mist flow. The landing area S2 of the foam flow is larger than the landing area S1 of the pulsating flow and narrower than the landing area S3 of the mist flow. The landing area S3 of the mist flow is wider than each of the landing area S1 of the pulsating flow and the landing area S2 of the foam flow. FIG. 3 illustrates an area S8 of dirt.

As shown in the column of “strength (flow velocity)” shown in FIG. 3, the flow velocity V1 of the pulsating flow is faster than each of the flow velocity V2 of the foam flow and the flow velocity V3 of the mist flow. The height of the “flow velocity” schematic diagram shown in FIG. 3 represents the degree of the flow velocity. That is, the flow rate represented by the relatively high schematic diagram is faster than the flow rate represented by the relatively low schematic diagram. The flow rate represented by the relatively low schematic diagram is slower than the flow rate represented by the relatively high schematic diagram.
The flow velocity V2 of the foam flow is slower than the flow velocity V1 of the pulsating flow and is faster than the flow velocity V3 of the mist flow. The mist flow velocity V3 is slower than each of the pulsating flow velocity V1 and the foam flow velocity V2.

  In the specification of the present application, the “flow velocity” is the water flow speed at a position where the water jetted from the water discharger 474 reaches the human body, or a position away from the water discharger 474 by a predetermined distance, It refers to a speed whose representative value is the mode (mode) of the speed distribution of the water flow of each cleaning form. That is, the speed at a landing portion where water sprayed from the water discharge portion 474 reaches the human body, or a position away from the water discharge portion 474 by a predetermined distance is the fluctuation of the water supplied to the water supply source 10 or the water discharge portion. Due to the turbulence of the water flow when jetted from 474, the distribution has a predetermined distribution as shown in the column “Sensitive strength (water power)” shown in FIG. Therefore, the flow rate of water in one cleaning form is not uniquely determined. Therefore, in the present specification, the representative value of “flow velocity” is defined as the mode value (mode) of the velocity distribution.

  As described above, the pulsating flow is a water flow to which the flow rate of the discharged water is changed, and is a water flow of a water mass that repeatedly appears periodically. Therefore, as shown in the column “Sensitive Strength (Water Force)” shown in FIG. 3, the pulsating flow has two velocity distributions: a flow velocity representing a water mass and a flow velocity representing a water flow other than the water mass. Have. The strength of water felt by humans (feeling strength (water power)) is governed by a relatively high flow velocity. Therefore, the flow velocity of the pulsating flow is set to the mode value Vm1 having a relatively fast velocity distribution. The foam flow has a single velocity distribution. The flow velocity of the foam flow is set to the mode value Vm2 of the velocity distribution of the foam flow. The mist flow has one velocity distribution. The flow rate of the mist flow is set to the mode value Vm3 of the velocity distribution of the mist flow.

  The relationship between the flow rates of water in each cleaning form is as described above with respect to the column of “strength (flow rate)”. Therefore, the water flow of the pulsating flow is stronger than each of the water flow of the foam flow and the water flow of the mist flow. The water flow of the foam flow is weaker than that of the pulsating flow and stronger than that of the mist flow. The mist flow is weaker than the pulsating flow and the foam flow. The water force is inversely proportional to the landing area and proportional to the flow velocity.

  “Water landing force” means the amount of exercise that water has per unit time and unit area at a position where the water jetted from the water discharger 474 reaches the human body or at a position away from the water discharger 474 by a predetermined distance. It means the power to remove dirt and float.

Here, energy saving, reduction of power consumption, and water saving are demanded for a sanitary washing apparatus for residential use and a non-residential (public) sanitary washing apparatus.
In public sites, a plurality of sanitary washing devices are often installed for one electrical wiring or one breaker. Therefore, even if multiple sanitary washing devices are used at the same time, the power consumption per unit time (power consumption) is instantaneous in the public field so that the power consumption does not exceed the allowable power consumption of electrical wiring and breakers. A sanitary washing apparatus having a hot water storage type heat exchanger that is lower than the power consumption of the type heat exchanger is often used.

  However, the amount of heat released during standby of the hot water storage type heat exchanger is larger than the amount of heat released during standby of the instantaneous heat exchanger. Therefore, the total power consumption of the sanitary washing apparatus including the hot water storage type heat exchanger is higher than the total power consumption of the sanitary cleaning apparatus including the instantaneous heat exchanger.

  On the other hand, the sanitary washing device 100 according to the present embodiment includes an instantaneous heating type heat exchanger unit 440. Here, consider a case where the sanitary washing device 100 according to the present embodiment is used for public use, for example. In this case, if the power consumption of the sanitary washing device 100 is set so that the power consumption does not become higher than the allowable power amount of one electrical wiring or breaker even if a plurality of sanitary washing devices 100 are used at the same time, Heating capacity is insufficient for the amount of water. Therefore, it is necessary to reduce the amount of water. However, when the amount of water is reduced, the width of the changeable water amount or the width of the usable water amount becomes narrow. For this reason, there is a possibility that the water force cannot be adjusted sufficiently only by changing the amount of water.

This will be further described with a specific example.
First, a sanitary washing device according to a comparative example will be described. The sanitary washing device according to the comparative example includes a hot water storage type heat exchanger unit. The maximum heater capacity of the hot water storage type heat exchanger unit is 250 watts (W). The rated power consumption of the hot water storage type heat exchanger unit is 318 watts. Therefore, in a public field, for example, up to six sanitary washing apparatuses can be installed for one electric wiring or one 20 amp capacity breaker. The feed water temperature is about 0 to 35 ° C. The heat exchanger unit stores water in the tank and heats the water. The amount of water sprayed from the water discharge portion of the cleaning nozzle is about 600 ml / min (ml / min) at the maximum and about 290 ml / min at the minimum. According to this, it is possible to secure a sufficient amount of water for obtaining a comfortable feeling of washing and a width of the amount of water for changing the body feeling strength (water force) in about five stages. Therefore, the water flow can be adjusted by changing the amount of water discharged from the water discharge portion of the cleaning nozzle.

  However, as described above, the overall power consumption of the sanitary washing device including the hot water storage type heat exchanger is higher than the overall power consumption of the sanitary washing device including the instantaneous heat exchanger.

  Next, a sanitary washing device according to another comparative example will be described. A sanitary washing device according to another comparative example includes an instantaneous heat exchanger unit. The feed water temperature is about 0 to 35 ° C. The heating capability of the heat exchanger unit 440 is about 37.5 ° C. The instantaneous heat exchanger unit heats the water from when the water is supplied to the inside of the heat exchanger unit itself until it is discharged. In order to ensure the heating capability of the heat exchanger unit 440, the maximum water discharge amount from the water discharge part of the cleaning nozzle of the sanitary washing apparatus having the instantaneous heat exchanger unit is the hot water storage type heat exchanger unit. It is less than the maximum water discharge amount of the water sprayed from the water discharge part of the washing nozzle of a sanitary washing apparatus. The maximum water discharge amount from the water discharge portion of the cleaning nozzle of this comparative example is about 430 ml / min. Therefore, the water flow can be adjusted by changing the amount of water discharged from the water discharge portion of the cleaning nozzle.

  However, the maximum heater capacity of the instantaneous heat exchanger unit is 1200 watts. The rated power consumption of the instantaneous heat exchanger unit is 1282 watts. Therefore, in this comparative example, it is not possible to install a plurality of sanitary washing devices for one system of electrical wiring or one 20 amp capacity breaker in a public field.

  On the other hand, the sanitary washing device 100 according to the present embodiment includes an instantaneous heating type heat exchanger unit 440. The maximum heater capacity of the instantaneous heat exchanger unit is 500 watts (W). The rated power consumption of the instantaneous heat exchanger unit is 533 watts. The rated power consumption of the heat exchanger unit 440 of this embodiment is lower than the rated power consumption of the heat exchanger units of other comparative examples described above. Therefore, in a public field, for example, up to three sanitary washing devices can be installed for one breaker. The feed water temperature is about 0 to 35 ° C. The heating capability of the heat exchanger unit 440 is about 37.5 ° C.

  In order to secure the temperature raising capability while reducing the power consumption, it is necessary to reduce the maximum water discharge amount of water sprayed from the water discharge portion of the cleaning nozzle. In the sanitary washing device 100 according to the present embodiment, the maximum water discharge amount of water sprayed from the water discharge portion of the cleaning nozzle is about 200 ml / min.

  However, when the maximum water discharge amount of the water sprayed from the water discharge portion of the cleaning nozzle is about 200 ml / min, the width of the changeable water amount or the available water amount is narrow. Therefore, there is a possibility that the water flow cannot be adjusted sufficiently only by changing the amount of water discharged from the water discharge portion of the cleaning nozzle. In addition, when a driving device such as a pump is provided, there are problems such as an increase in the size of the sanitary washing device, a complicated structure of the sanitary washing device, and a complicated maintenance operation.

  On the other hand, the control unit 405 of the present embodiment controls the flow rate switching valve 471 based on the instruction to change the water flow output from the operation unit 500, and the water passing through the instantaneous heat exchanger unit 440 is controlled. The flow rate, that is, the amount of water passing through the heat exchange unit 440 per unit time is kept substantially constant. Further, the control unit 405 controls the flow path switching valve 472 to change the water flow by adjusting the flow velocity while maintaining the straight flow or the dispersed flow.

  According to the present embodiment, the control unit 405 changes the water flow by controlling the flow rate switching valve 472 and adjusting the flow rate while controlling the flow rate switching valve 471 to keep the flow rate substantially constant. Therefore, even in the sanitary washing device 100 having a low water amount (for example, about 200 ml / min described above), the water pressure can be changed without using a driving device such as a pump. In addition, even when the water flow is changed, the flow rate of water passing through the heat exchanger unit 440 is kept substantially constant, so that variation in the temperature of water raised by the heat exchanger unit 440 is suppressed. be able to.

FIG. 4 is a graph illustrating a specific example of the control operation of this embodiment.
FIG. 5 is a schematic plan view illustrating a specific example of the operation unit of the present embodiment.
The horizontal axis of the graphs shown in FIGS. 4A to 4C represents another cleaning mode. The vertical axis of the graph shown in FIG. 4A represents the flow rate. The vertical axis of the graph shown in FIG. 4B represents the flow velocity. The vertical axis of the graph shown in FIG. 4C represents the physical strength (water power).
FIG. 5A is a schematic plan view illustrating a specific example of a public operation unit. FIG. 5B is a schematic plan view illustrating a specific example of an operation unit for a house.

First, a specific example of a public operation unit will be described with reference to FIG.
The public operation unit 500 a includes a “stop” switch (stop switch) 501, a “butt” switch 502 that discharges water toward the “butt”, a “bidet” switch 503 that executes bidet cleaning, and a cleaning nozzle 473. A “water force” switch 510 that changes the water force of water sprayed from the water discharger 474. The “water power” switch 510 includes a “−” switch 511 and a “+” switch 512.

  By pressing the “−” switch 511, the user can make the water level of water sprayed from the water discharger 474 of the cleaning nozzle 473 weaker than the water level before pressing the “−” switch 511. On the other hand, by pressing the “+” switch 512, the user can make the water flow from the water discharger 474 of the cleaning nozzle 473 stronger than the water flow before pressing the “+” switch 512.

Next, a specific example of an operation unit for a house will be described with reference to FIG.
The residential operation unit 500b includes a “stop” switch (stop switch) 501, a “wet” switch 502 that discharges water toward the “wet”, a “bide” switch 503 that executes bidet cleaning, and a water spread. The “soft” switch 504 is provided, the “dry” switch 505 for starting the blowing of warm air, and the “water force” switch 510 for changing the water pressure of water sprayed from the water discharger 474 of the cleaning nozzle 473. The “water power” switch 510 includes a “weak” switch 511 and a “strong” switch 512.

  By pressing the “weak” switch 511, the user can make the water flow from the water discharger 474 of the cleaning nozzle 473 weaker than the water flow before pressing the “weak” switch 511. On the other hand, by pressing the “strong” switch 512, the user can make the water flow from the water discharger 474 of the cleaning nozzle 473 stronger than the water before pressing the “strong” switch 512.

  Next, a case where the user gives an instruction to increase the water force will be described with reference to FIG. In this case, the control unit 405 controls the flow path switching valve 472 so that the foam flow is ejected from the water discharger 474 before the user gives an instruction to increase the water flow through the operation unit 500. Specifically, the control unit 405 controls the flow path switching valve 472 to set the water supply destination to the second in-nozzle flow path 22 and to eject a foam flow from the second water discharge port 474b.

  As shown in FIG. 4A, when the user gives an instruction to increase the water force with the operation unit 500, the control unit 405 instructs to change the water force output from the operation unit 500 (here, the water force is changed). The flow rate switching valve 471 is controlled based on the instruction to strengthen the flow rate, and the flow rate of water passing through the heat exchanger unit 440 is kept substantially constant. Further, the control unit 405 controls the flow path switching valve 472 to inject a pulsating flow from the water discharge unit 474. Specifically, the control unit 405 controls the flow path switching valve 472 to set the water supply destination to the first in-nozzle flow path 21 and to eject a pulsating flow from the first water outlet 474a.

As described above with reference to FIG. 3, the pulsating flow velocity V1 is faster than the foam flow velocity V2. Therefore, as shown in FIG. 4B, the flow velocity becomes faster than before the user gives an instruction to increase the water force by the operation unit 500.
Further, as described above with reference to FIG. 3, the pulsating flow water force is stronger than the foam flow water force. Therefore, as shown in FIG. 4C, the water force becomes stronger than before the user gives an instruction to increase the water force using the operation unit 500.

  On the other hand, when the user gives an instruction to weaken the water force, the control unit 405 performs an operation opposite to the operation described above.

  As described above, the control unit 405 controls the flow path switching valve 472 to switch the washing mode of water sprayed from the water discharger 474 to either a pulsating flow or a foam flow (continuous flow). The flow rate of water sprayed from the water discharger 474 is adjusted while maintaining. Specifically, the control unit 405 controls the flow path switching valve 472 to inject water by switching the water supply destination to either the first nozzle flow path 21 or the second nozzle flow path 22. The water discharger 474 to be switched is switched to either the first water discharge port 474a or the second water discharge port 474b.

  According to this, since the control part 405 adjusts the flow rate of the water injected from the water discharging part 474 by switching a washing | cleaning form to either a pulsating flow or a foam flow, also in the sanitary washing apparatus 100 of low water quantity, The difference becomes noticeable. As a result, the difference in water is significant. It is possible to change the water pressure that is satisfactory to the user.

  Moreover, the control part 405 can switch a washing | cleaning form (pulsation flow, foam flow) easily by switching the water discharging part 474. FIG. Therefore, in the sanitary washing device 100 with a low amount of water, the water force can be easily changed.

For example, when the control unit 405 starts to inject water from the water discharging unit 474 based on the instruction to start cleaning (for example, the instruction to start cleaning “wet”) output from the operation unit 500, the control unit 405 It starts from injection of a cleaning mode (here, pulsating flow) having a relatively high flow rate among the flow rates of water to be generated.
According to this, dirt can be efficiently removed at the start of cleaning.

For example, when the control unit 405 starts to inject water from the water discharging unit 474 based on the instruction to start cleaning (for example, the instruction to start cleaning “wet”) output from the operation unit 500, the control unit 405 It starts with injection of a relatively slow flow rate of the washing flow rate (here, a foam flow).
According to this, it is possible to reduce the scattering of water at the start of cleaning.

Next, each cleaning mode of the present embodiment will be described with reference to the drawings.
Hereinafter, for convenience of description, the cleaning nozzles that eject each cleaning mode will be described as different cleaning nozzles. However, each cleaning nozzle described below may be one cleaning nozzle. That is, a plurality of water outlets may be provided in one washing nozzle.

FIG. 6 is a schematic plan view showing the water discharge state (injection state) of the pulsating flow of the present embodiment.
In FIG. 6, the axis along the traveling direction of the water discharge JW is taken as the J axis. The axis along the vertical direction (upward) is taken as the V axis. The same applies to FIGS. 7 to 12.

In this embodiment, the pulsating flow is classified as a straight flow.
The washing nozzle 473a that ejects the pulsating flow periodically varies the flow rate of the discharged water without using a pump, and causes a large water mass to collide with the discharge target site.

  When the flow rate of the water discharged in this way varies, the water discharge JW includes the part Wp1, the part Wp2, the part Wp3, the part Wp4, and the part Wp5 as shown in FIG. When the flow velocities of these parts are V11, V12, V13, V14, and V15, the relationship between the flow velocities is V11 (≈V15) <V12 (≈V14) <V13.

  Therefore, since the speed of the part Wp3 is faster than the speed of the part Wp2, the part Wp3 merges with the part Wp2 as time passes from immediately after water discharge to FIG. 6 (a) to FIG. 6 (c). Combines with Wp1 to form a large water mass.

  As described above, the portion Wp3 having the maximum flow velocity is sequentially merged with the portion Wp2 and the portion Wp1 in front of the portion, thereby forming a large lump and landing on the human body part. When this washing water hits a human body part, it is in a water mass state with a large collision energy (washing strength). The flow velocity V13 of this part Wp3 is the maximum flow velocity. Therefore, the wash water discharged by the pulsating flow is discharged from the first water discharge port 474a in such a water discharge form that a combined water mass appears every pulsation cycle. Moreover, since such a phenomenon occurs in the pulsation cycle, as described above, the water mass that has undergone the coalescence of the maximum flow velocity portion Wp3 appears repeatedly. The water mass at a certain water discharge timing and the water mass that has passed through the combination of the parts Wp3 at the next water discharge timing are discharged at substantially the same speed. And each water mass will be in the state connected with the site | part Wp4 and site | part Wp5 which were discharged after the site | part Wp3 in the maximum flow velocity.

  The washing nozzle 473a that injects a pulsating flow changes the flow rate of discharged water without using a pump, and discharges water by the water mass that appears periodically as described above. The cleaning nozzle 473a has a water reservoir chamber 460 on the upstream side of the first water outlet 474a. The cleaning nozzle 473a changes the flow rate of discharged water by supplying bubbles through the water reservoir chamber 460. The configuration of the water reservoir 460 will be described with reference to FIGS.

7-12 is a schematic diagram explaining the pulsating flow of this embodiment.
FIGS. 7A, 8 </ b> A, 9, 10 </ b> A, 11, and 12 </ b> A are schematic cross-sectional views illustrating a schematic configuration of the water reservoir 460.
7A, FIG. 8A, FIG. 9, FIG. 10A, FIG. 11 and FIG. 12A are schematic cross-sectional views taken along the section AA shown in FIG.
FIG.7 (b) is typical sectional drawing in cut-surface BB represented to Fig.7 (a). FIG.7 (c) is typical sectional drawing in the cut surface CC represented to FIG. FIG. 8B is a schematic cross-sectional view taken along the cutting plane DD shown in FIG. FIG. 8C is a schematic enlarged view of the region D shown in FIG. FIGS. 10B and 10C are schematic enlarged views of the region F shown in FIG. FIG.10 (d) is typical sectional drawing in the cut surface EE represented to Fig.10 (a). FIG. 12B is a schematic cross-sectional view taken along the cutting plane GG shown in FIG.

  As shown in FIG. 7A, the water reservoir chamber 460 includes an air pipe 461, a first water supply pipe 462 (water supply path), a discharge pipe 463, and a second water supply pipe 464. ing. The air pipe 461, the first water supply pipe 462, the discharge pipe 463, and the second water supply pipe 464 are pipes provided so as to communicate with the inside of the water reservoir chamber 460.

  The water reservoir chamber 460 has a substantially rectangular parallelepiped box shape as a whole. The water reservoir chamber 460 includes a wall 460e, a wall 460f (second side surface), a wall 460g (third side surface), and a wall 460h (first side surface) provided on the other side end side. And a wall 460i and a wall 460j. In FIG. 7A, the wall 460e, the wall 460f, the wall 460g, and the wall 460h are drawn so as to form a rectangle. The wall 460i and the wall 460j are walls arranged at positions facing each other, and are walls arranged to connect the wall 460e, the wall 460f, the wall 460g, and the wall 460h.

  The air pipe line 461 communicates with the interior of the water reservoir chamber 460 via an air inlet 460 a formed in the water reservoir chamber 460. The air inlet 460a is formed at the upstream end of the wall 460g in the vicinity of the corner where the wall 460g and the wall 460h are abutted. The first water supply conduit 462 communicates with the interior of the water reservoir chamber 460 via the injection port 460b. The injection port 460b is near the corner where the wall 460h and the wall 460e face each other, and is formed in the wall 460h. The discharge pipe line 463 communicates with the inside of the water reservoir chamber 460 through the water reservoir chamber side opening 460c. The water reservoir chamber side opening 460c is formed in the wall 460f near the corner where the wall 460f and the wall 460e face each other. The second water supply conduit 464 communicates with the interior of the water reservoir 460 through the auxiliary water flow inlet 460d. The auxiliary water flow inlet 460d is formed in the wall 460f in the vicinity of the corner where the wall 460f and the wall 460g are abutted.

  The air duct 461 is a duct connecting the air inlet 460a and the opening opened to the atmosphere. Air introduced from the air duct 461 is drawn into the water reservoir 460 from the air inlet 460a. The air drawn into the water reservoir 460 forms bubbles BA.

  The first water supply pipe 462 is a pipe that connects the injection port 460 b and the water supply source 10. The first water supply conduit 462 is reduced in diameter in the middle of the conduit or at the injection port 460b. Accordingly, the speed of the water supplied from the first water supply conduit 462 is increased, and the water is injected into the water reservoir 460 as the jet WSm.

  The discharge conduit 463 is a conduit connecting the water reservoir chamber side opening 460c and the first water discharge port 474a formed in the cleaning nozzle 473a. That is, at least a part of the discharge conduit 463 forms the first in-nozzle passage 21 (see FIG. 2). In the case of the present embodiment, the injection port 460b and the water reservoir chamber side opening 460c are disposed to face each other. Accordingly, the jet WSm injected into the water reservoir chamber 460 from the injection port 460b travels along the J axis in the water reservoir chamber 460 and enters the discharge pipe 463 from the water reservoir chamber side opening 460c. The water that has entered the discharge pipe 463 travels along the J-axis along the discharge pipe 463 and is discharged from the first water outlet 474a to the outside.

  The second water supply pipe 464 is a pipe that connects the auxiliary water flow inlet 460 d and the water supply source 10. The second water supply conduit 464 communicates with the interior of the water reservoir 460 through the auxiliary water flow inlet 460d. At least a part of the water supplied from the second water supply conduit 464 forms a sub-water flow WSs that is a swirling flow in the water reservoir chamber 460.

  As described above, the jet WSm injected into the water reservoir chamber 460 from the injection port 460b travels along the J axis in the water reservoir chamber 460 and enters the discharge conduit 463 from the water reservoir chamber side opening 460c. Accordingly, a water flow path portion 465 that is a path through which the jet flow WSm from the injection port 460b to the first water discharge port 474a passes is formed. In the case of this embodiment, the water flow path part 465 is a path | route which connects the injection port 460b and the water reservoir room side opening 460c.

  The remaining area of the water reservoir chamber 460 excluding the water flow path portion 465 is a water reservoir portion 466. The water reservoir 466 is a part for forming the water PW adjacent to the water flow path portion 465. In the case of this embodiment, the water reservoir 466 is formed so as to surround the water flow path portion 465.

  In the case of the present embodiment, the injection port 460b and the water reservoir chamber side opening 460c are disposed close to one side of the rectangular water reservoir chamber 460. On the other hand, the air introduction port 460a and the auxiliary water flow introduction port 460d are disposed close to the other side of the rectangular water reservoir 460. Therefore, the injection port 460b and the water reservoir chamber side opening 460c, and the air introduction port 460a and the auxiliary water flow introduction port 460d are spaced apart.

  In the state shown in FIG. 7A, the jet WSm travels in the pooled water PW, and receives the resistance from the pooled water PW as shown in FIG. Heading to The jet WSm that has reached the water reservoir chamber side opening 460c enters the discharge pipe 463, and proceeds while being in contact with the inner wall surface of the discharge pipe 463 as shown in FIG. 7C.

  In the state shown in FIG. 7A, the bubble BA is small. When the time further advances from the state shown in FIG. 7A, the bubbles BA grow into an elongated shape as shown in FIG. 8A. The bubble BA grows until its lower end approaches the jet WSm. Therefore, the region in which the sub-water flow WSs can turn is narrower than the state shown in FIG. The swirling flow velocity of the auxiliary water stream WSs is high. The secondary water stream WSs is swirling in a direction that does not hinder the flow of the jet stream WSm.

  As shown in FIG. 8B, the elongated bubble BA is formed by three walls 460h, 460i, 460j, and 460f extending from the air introduction port 460a of the water reservoir chamber 460 toward the injection port 460b. Growing in contact with 460h, 460i, 460j. Therefore, the surface that contacts the secondary water flow WSs is the surface that faces the secondary water flow inlet 460d.

  As shown in FIG. 8C, buoyancy acts in the V-axis direction, which is the vertical direction, on the bubbles BA grown in an elongated shape. The auxiliary water stream WSs acts on the bubble BA so as to resist this buoyancy. Accordingly, the bubble BA is kept in contact with the three walls 460h, 460i, 460j, and 460f of the four walls 460h, 460i, 460j, and 460f extending from the air introduction port 460a of the water reservoir chamber 460 toward the injection port 460b. Can do.

  From the viewpoint of the growth of the elongated bubble BA, the walls 460h, 460i, and 460j function as a guide surface that guides the bubble BA from the air introduction port 460a to the water flow path portion 465. The secondary water flow WSs generates a force that presses the bubble BA toward the walls 460h, 460i, and 460j so that the bubble BA does not separate from the walls 460h, 460i, and 460j, which are guide surfaces, and grows the bubbles into an elongated shape. It functions as a pressure applying means. In the present embodiment, it is more preferable that the length of the guide surface from the air introduction port 460a side to the water flow path portion 465 side is longer than the length of the water flow path portion 465 from the injection port 460b to the water reservoir chamber side opening 460c. .

  When time further advances from the state shown in FIG. 8A, the elongated bubble BA approaches the jet WSm and begins to interfere as shown in FIG. The bubble BA is pulled by the jet WSm and enters the water flow path portion 465. Accordingly, the water that has entered the bubble BA is pushed away, and the swirling flow velocity of the sub-water flow WSs is increased. The sub-water flow WSs whose swirl velocity is increased tears the bubbles BA.

  When time further advances from the state shown in FIG. 9, the bubbles BA are completely drawn into the jet WSm as shown in FIG. The bubble BA exists over substantially the entire area of the water flow path portion 465.

  As shown in FIG. 10B, since the bubble BA exists over substantially the entire area of the water flow path portion 465, it exists up to the vicinity of the injection port 460b. Therefore, the amount of water existing in the vicinity of the injection port 460b is reduced, and the generation of eddy currents in the vicinity of the injection port 460b is suppressed. When the bubble BA is formed at a position away from the injection port 460b, the state is as shown in FIG. In the state shown in FIG. 10C, there is a lot of water in the vicinity of the injection port 460b, and a lot of eddy currents are generated. The generation of the vortex is resistant to the progress of the jet WSm. Therefore, by suppressing the vortex as shown in FIG. 10B, the velocity of the jet WSm can be reduced toward the first water outlet 474a.

  As shown in FIG. 10D, the jet WSm penetrates the bubble BA. Thus, the jet WSm penetrates the bubble BA, so that the resistance around the jet WSm decreases. The jet WSm can go to the first water outlet 474a without reducing the speed. However, the state in which the jet WSm completely penetrates the bubble BA as illustrated in FIG. 10D is not essential. It is only necessary that many portions around the jet WSm can be surrounded by the bubbles BA. A part of the jet WSm may be in contact with the stored water PW.

  When time further advances from the state shown in FIG. 10A, the bubble BA moves toward the discharge pipe 463 so as to be drawn into the jet WSm as shown in FIG. Since the bubbles BA are formed so as to have a flow passage cross-sectional area wider than the water flow path portion 465, the air bubbles BA move toward the discharge pipe 463 while being caught on the outer periphery of the water reservoir chamber side opening 460c. The bubbles BA caught on the outer periphery of the water reservoir chamber side opening 460c in this way enter the discharge pipe 463 while being pushed in from behind by the jet flow WSm or being pushed in by receiving pressure from the water PW.

  When the time further advances from the state shown in FIG. 11, the bubble BA enters the discharge pipe 463 as shown in FIG. As shown in FIG. 12B, when the bubble BA enters the discharge pipe 463, an air film is formed along the inner wall of the discharge pipe 463. The jet WSm travels through the film. Therefore, the resistance that the jet WSm receives from the inner wall of the discharge pipe 463 decreases. The jet WSm is directed to the first water outlet 474a without being decelerated. However, the state in which the bubble BA completely wraps the jet WSm as illustrated in FIG. 12D is not essential. It is only necessary that many portions around the jet WSm can be surrounded by the bubbles BA. A part of the jet WSm may be in contact with the discharge conduit 463.

  When the bubble BA further advances downstream from the discharge pipe 463 from the state shown in FIG. 12A, the next bubble BA is taken in from the air pipe 461. The state of the water reservoir 460 returns to the state of FIG. In the present embodiment, the movement of the bubble BA described with reference to FIGS. 7 to 12 is repeated periodically.

FIG. 13 is a schematic cross-sectional view illustrating a cleaning nozzle that ejects a foam flow according to the present embodiment.
FIG. 13 is a schematic cross-sectional view taken along a cutting plane AA shown in FIG.

In the present embodiment, the foam flow is classified as a straight flow.
The cleaning nozzle 473b that ejects the foam flow has a second in-nozzle flow path 22 (see FIG. 2), a water supply chamber 421, an orifice part 422, an air suction part 423, and a throat part 424. Wash water is supplied to the second nozzle flow path 22. The water supply chamber 421 changes the course of the wash water supplied from the second in-nozzle flow path 22 in the direction of the orifice portion 422. The orifice part 422 increases the flow rate of the cleaning water. The air suction unit 423 sucks air. The outlet of the throat portion 424 corresponds to the second water outlet 474b.

  For example, the diameter of the orifice part 422 is set to φ1.3 millimeters (mm). For example, the inlet diameter of the throat portion 424 is set to φ2.1 mm. That is, the area ratio of the sectional area SA1 of the outlet of the orifice part 422 and the sectional area of the inlet of the throat part 424 is about 2.6. For example, the outlet diameter of the throat portion 424 is set to φ2.3 mm. That is, the area ratio (SA2 / SA1) of the sectional area SA1 of the outlet of the orifice part 422 and the sectional area SA2 of the outlet of the throat part 424 is about 3.1.

  The throat portion 424 is a part connected by a smooth curve in the middle, and has a part where the throat diameter increases as it advances in the direction of washing water injection. Therefore, the exit area of the throat portion 424 is larger than the entrance area of the throat portion 424. The throat portion 424 has a portion where the passage area of the cleaning water increases as it proceeds in the direction of jetting the cleaning water. The throat portion 424 is disposed on the trajectories X and Y from the orifice portion 422 to the anus a or the bidet b. In the cleaning nozzle 473b shown in FIG. 13, the orifice part 422 and the throat part 424 are arranged on the same axis. However, the throat portion 424 does not necessarily have a portion where the throat diameter increases.

  When water pressure is applied upstream of the orifice part 422, the washing water (flow velocity: for example, about 12 meters / second (m / s)) injected from the outlet of the orifice part 422 was injected without any obstruction. Colliding with the human body due to water pressure. That is, there is almost no energy loss (ie, slowing of the wash water).

  An air inlet is provided around the orifice portion 422. When cleaning water is jetted from the outlet of the orifice part 422, a negative pressure is generated around the orifice part 422. The jet passes through the throat portion while sucking air (so-called ejector effect). At that time, an air vortex is generated between the inner wall surface of the throat portion 424 and the jet. This vortex promotes turbulence around the jet. Furthermore, the exit area of the throat portion 424 is larger than the entrance area of the throat portion 424. Alternatively, the throat portion 424 has a portion where the passage area of the cleaning water (jet flow) gradually increases. Therefore, the vortex of air generated in a gap of about 0.5 to 1 mm generated between the jet that gradually expands toward the outlet of the throat portion 424 and the inner wall surface of the throat portion 424 is chained. This chained air vortex interferes with the jet in a complex manner, and the turbulence around the jet is further promoted. Due to the disturbance, the washing water sprayed from the throat portion 424 becomes thinner or thicker. This repeated thinness of the washing water causes high and low repetitions of the washing water sprayed from the throat portion 424. Due to the repetition of the speed difference, the repeated density of the washing water jet appears as a natural variation. The flow of washing water that repeats such density becomes a foam flow.

FIG. 14 is a schematic cross-sectional view illustrating a cleaning nozzle that ejects a mist flow according to the present embodiment.
14 is a schematic cross-sectional view taken along a cutting plane AA shown in FIG.

In the present embodiment, the mist flow is classified as a dispersed flow.
The cleaning nozzle 473 c that ejects the mist flow has a nozzle body 411 and a throat 415. Inside the nozzle body 411, a third in-nozzle channel 23 (see FIG. 2) through which the wash water supplied from the water supply source 10 passes, a first swirl chamber 412 capable of generating swirl flow, A communication passage 414 that guides the washing water from one swirl chamber 412 to the throat 415 is provided. A projecting portion 413 that generates a swirling flow with a more stable swirl force is provided at the center of the first swirl chamber 412.

  The first swirl chamber 412 is formed by a large-diameter portion inner peripheral wall 412a having a larger diameter at the bottom and an inclined inner peripheral wall 412b having a diameter contracted toward the communication path 414, and is a hollow chamber. The inclined inner peripheral wall 412b is connected to the communication path 414 at one end thereof. The third nozzle flow path 23 is eccentrically connected to the first swirl chamber 412. Specifically, the third in-nozzle flow path 23 is connected in the tangential direction of the large-diameter portion inner peripheral wall 412 a of the first swirl chamber 412.

  The throat 415 is formed in a cylindrical shape. Inside the throat 415, a throat flow path 416 through which the cleaning water discharged from the communication path 414 of the nozzle body 411 passes is provided. At one end of the throat flow path 416, a third water discharge port 474c that discharges the wash water that has passed through the throat flow path 416 to the outside of the throat 415 is formed. In the throat flow path 416 in the vicinity of the third water discharge port 474c, a taper portion 417 in which the flow path expands toward the third water discharge port 474c is formed.

  In the cleaning nozzle 473c shown in FIG. 14, a gap is provided between the nozzle body 411 and the throat 415. However, this gap is not necessarily provided. That is, the nozzle body 411 and the throat 415 may be integrally formed, and the communication path 414 and the throat flow path 416 may be connected.

  When the cleaning water is supplied from the water supply source 10 to the cleaning nozzle 473 c, the cleaning water flows through the third nozzle flow path 23 and flows into the first swirl chamber 412. Here, since the third in-nozzle flow path 23 is connected in the tangential direction of the large-diameter portion inner peripheral wall 412a of the first swirl chamber 412, the wash water flowing into the first swirl chamber 412 has a large diameter. It turns along the inner peripheral wall 412a and the inclined inner peripheral wall 412b. The washing water swirled in the first swirl chamber 412 passes through the communication path 414 while maintaining the swirling force, and is discharged from one end of the communication path 414 into the throat flow path 416 of the throat 415. Since the washing water discharged from the nozzle body 411 maintains the turning force, it is discharged in a hollow conical shape as a liquid film having a hollow portion at the center.

  Wash water discharged from the nozzle body 411 in a hollow conical shape is received by the inner wall of the throat channel 416. The washing water that has flowed into the throat flow path 416 flows along the inner wall of the throat flow path 416 while maintaining the turning force, and is guided to the third water discharge port 474c. That is, the wash water that passes through the throat channel 416 flows so as to adhere to the inner wall of the throat channel 416. Therefore, the wash water flowing through the throat flow path 416 receives resistance due to frictional force from the inner wall of the throat flow path 416, and the flow rate of the wash water becomes slower toward the third water discharge port 474c. Accordingly, as shown in FIG. 14, the thickness of the liquid film in the vicinity of the third water discharge port 474 c flows into the thickness of the liquid film when water is discharged from the nozzle body 411 or the throat flow path 416. Thicker than the thickness of the liquid film immediately after. Alternatively, the thickness D2 of the liquid film of the hollow conical water discharge 610 discharged from the third water discharge port 474c is thicker than the thickness D1 of the liquid film of the hollow conical water discharge discharged from the nozzle body 411.

  The flow rate of the wash water flowing through the throat flow path 416 is faster in the vicinity of the inner wall of the throat flow path 416, that is, in the center of the throat flow path 416 than in the boundary layer. That is, the throat 415 can make the flow rate of the cleaning water flowing near the inner wall of the throat flow channel 416 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 416. . In other words, the throat 415 includes a flow outside the washing water liquid film (on the inner wall side of the throat flow path 416), a flow inside the washing water liquid film (on the central portion side of the throat flow path 416), A speed difference can be made between the two. This is because the washing water outside the liquid film (on the inner wall side of the throat flow path 416) has a larger frictional force than the washing water inside the liquid film (on the central portion side of the throat flow path 416). 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 of crossing the liquid film as indicated by an arrow A1 in FIG. 14 in the wash water flowing through the throat flow path 416. The throat flow path 416 in the vicinity of the third water discharge port 474c is formed with a tapered portion 417 in which the flow path expands toward the third water discharge port 474c, and therefore water is discharged from the third water discharge port 474c. The cleaning water flows along the tapered portion 417. Therefore, eddy currents are more likely to occur in the direction crossing the liquid film in the wash water discharged from the third water discharge port 474c.

  The wash water discharged from the third water discharge port 474c is discharged as a liquid film having a hollow portion at the center, that is, as the hollow conical water discharge 610, but at a position somewhat separated from the third water discharge port 474c. Transition to the converted water flow (mist flow) 620. Specifically, since a vortex flow is generated in the hollow conical water discharge 610 discharged from the third water discharge port 474c in a direction crossing the liquid film, it is separated to some extent from the third water discharge port 474c. In position, cracks occur between adjacent vortices. Then, as shown in FIG. 14, the hollow conical water discharge 610 discharged from the third water discharge port 474 c is crushed at a position somewhat away from the third water discharge port 474 c. In this manner, the hollow conical water discharge 610 discharged from the third water discharge port 474c transitions to a granulated water flow (mist flow) 620.

Next, another cleaning mode of the present embodiment will be described with reference to the drawings.
FIG. 15 is a schematic cross-sectional view illustrating a cleaning nozzle that injects the revolving spout water flow of the present embodiment. FIG. 16 is a schematic view illustrating an example of the state of the revolving spout water flow.
FIG. 15A is a schematic cross-sectional view taken along the cutting plane AA shown in FIG. FIG. 15B is a schematic cross-sectional view taken along the cutting plane HH shown in FIG.

In the present embodiment, the revolving spout water flow is classified as a straight flow.
The cleaning nozzle 473d that injects the revolving spout water flow has a second swirl chamber 481 formed in a cylindrical shape as an inflow chamber into which the cleaning water flows. The wash water guided through the fourth nozzle inner flow path 24 is supplied to the second swirl chamber 481. The fourth in-nozzle flow path 24 includes a water passage 24a and a swirl chamber inflow path 24b. The cross-sectional area of the swirl chamber inflow passage 24b is narrower than the cross-sectional area of the water passage 24a. The swirl chamber inflow passage 24 b is eccentric to the center of the second swirl chamber 481 and is connected to the second swirl chamber 481. Therefore, the wash water from the swirl chamber inflow passage 24b flows from the tangential direction into the second swirl chamber 481 and generates a swirl flow swirling as shown in FIG. In this case, since the water flow cross-sectional area of the swirl chamber inflow passage 24b is narrower than the water flow cross-sectional area of the water flow passage 24a, the swirl chamber inflow passage 24b increases the flow rate of the washing water flowing into the second swirl chamber 481. Can do.

  The cleaning nozzle 473d has a water discharger 482 incorporated in the second swirl chamber 481. The water discharge body 482 includes a small-diameter cylindrical water discharge portion 482a having a fourth water discharge port 474d for the wash water, and a large-diameter cylindrical force receiving portion 483 continuous with the water discharge portion 482a. The force receiving portion 483 is located in the second swirl chamber 481, receives various forces from the swirling flow, and is involved in the swinging revolution drive of the water spouting body 482. That is, the force receiving portion 483 is located in the second swirl chamber 481 (inflow chamber) continuously to the water discharge portion 482a, and thus corresponds to the indoor portion. The force receiving portion 483 has a water supply pipe 484 penetrating in the lateral direction, and guides the cleaning water in the second swirl chamber 481 from the water supply pipe 484 to the fourth water discharge port 474d. The water supply pipe 484 is opened at the force receiving portion 483 so as to cross the cross. The sum total of the passage sectional areas of the water supply pipe 484 is wider than the passage sectional area of the fourth water outlet 474d. Therefore, when the cleaning water is guided from the water supply pipe 484 to the fourth water outlet 474d, the cleaning water is rectified depending on the size of the area. Therefore, the wash water discharged from the fourth water outlet 474d is stable.

  The water discharge body 482 is inserted and supported in a state where the water discharge portion 482a is inscribed in a seal portion 485 provided at the upper opening of the second swirl chamber 481. The force receiving portion 483 hangs substantially in the center of the second swirl chamber 481. Therefore, when the cleaning water flows into the second swirl chamber 481 from the swirl chamber inflow path 24b, the wash water causes a swirling flow around the force receiving portion 483 along the inner peripheral wall surface of the second swirl chamber 481.

  The outer diameter of the force receiving portion 483 is about 35 to 80%, preferably about 40 to 70% of the inner diameter of the second swirl chamber 481.

  The seal portion 485 that supports the water discharge body 482 is formed of an elastic body such as an O-ring or a seal ring. As shown in FIG. 15A, the seal portion 485 supports the water discharge body 482 with the fourth water discharge port 474 d facing the outside of the second swirl chamber 481. Since the seal portion 485 is formed of an elastic body, the force receiving portion 483 can be inclined in each direction in the second swirl chamber 481 while supporting the water discharge body 482 and the force receiving portion 483. Can be swung in an inclined posture. In addition, since the seal portion 485 is formed of an elastic body, the water discharge body 482 rotates around the central axis within the second swirl chamber 481, and is supported by the seal portion 485. It is possible to freely perform revolutions, etc., that rotate in a conical shape with the apex at the top. The rotation and revolution of the water discharge body 482 are caused by the force receiving portion 483 and the swirl flow.

  As shown in FIG. 15A, the upper wall of the second swirl chamber 481 is a tapered guide portion 486 having a small diameter on the water discharge portion 482 a side of the water discharge body 482. The taper guide portion 486 regulates the maximum inclination angle of the force receiving portion 483 and the water discharge body 482.

  As illustrated in FIG. 16, when the water discharge body 482 swings and revolves, the fourth water discharge port 474 d revolves while changing the water discharge direction in accordance with the swing revolving of the water discharge body 482. Therefore, the fourth water discharge port 474d discharges the wash water while drawing a trajectory expanded spirally, and as a result, a conical revolving water discharge flow is realized. Therefore, the water discharge trajectory of the cleaning water is a trajectory of the conical revolving spout water flow having a trajectory much larger than the trajectory of the fourth water discharge port 474d, and the local portion can be cleaned over a wide range.

FIG. 17 is a schematic cross-sectional view illustrating a cleaning nozzle that ejects a swirling flow according to the present embodiment.
FIG. 18 is a schematic cross-sectional view showing a circular chamber inside the cleaning nozzle.
18 is a schematic cross-sectional view taken along a cutting plane II shown in FIG.

In this embodiment, the swirl flow is classified as a dispersed flow.
The cleaning nozzle 473e that jets the swirling flow includes a fifth water outlet 474e, a first opening 491, a second opening 492, a first water passage 25a, and a second water passage (fifth nozzle). Inner flow path) 25b.

  The first opening 491 opens to the fifth water outlet 474e, and forms a jet flow in the axial direction of the fifth water outlet 474e. The second opening 492 opens to the fifth water outlet 474e, and forms a jet flow in the tangential direction of the fifth water outlet 474e. The first water passage 25 a is formed in the cleaning nozzle 473 e and communicates with the first opening 491. The second water passage 25 b is formed in the cleaning nozzle 473 e and communicates with the second opening 492. The axial ejection flow of the fifth water outlet 474e from the first opening 491 interferes with the tangential ejection flow of the fifth water outlet 474e from the second opening 492, and the fifth It ejects from the spout 474e.

  A fifth water outlet 474e is formed in the vertical direction at the tip of the cleaning nozzle 473e. A circular chamber 493 having an inner diameter larger than the inner diameter of the fifth water outlet 474e is formed coaxially with the fifth water outlet 474e.

  One first opening 491 that forms a jet flow in the axial direction of the fifth water discharge port 474 e opens into the circular chamber 493. In addition, a plurality of second openings 492 that form a jet flow in the tangential direction of the fifth water discharge port 474 e are open to the circular chamber 493.

  That is, the plurality of second openings 492 have four tangential openings that open tangentially to the inner peripheral wall of the circular chamber 493, for example, every 90 degrees as shown in FIG. A swirl flow is formed inside.

  The first water passage 25a communicates with a first flow rate adjustment valve (not shown). The second water passage 25b communicates with a second flow rate adjustment valve (not shown). The first flow rate adjustment valve and the second flow rate adjustment valve are configured so that the first water channel 25a and the second flow rate adjustment valve are constant in a state in which the total sum of the flow rates of the cleaning water flowing through the first water channel 25a and the second water channel 25b is constant. The flow rate of the washing water flowing through the water channel 25b is changed. By changing the flow rate ratio and the interference state between the axial jet flow of the fifth spout 474e and the tangential jet flow of the fifth spout 474e, the wash water from the fifth spout 474e is changed. The arrival height (cleaning load, strength) and cleaning area of the ejection pattern can be controlled. For example, by appropriately setting the flow rate of the wash water flowing through the first water passage 25a and the second water passage 25b, a wide-angle wash water ejection pattern (swirl flow) having a large tangential component is formed.

  FIG. 19 is a schematic cross-sectional view showing another cleaning nozzle that injects the swirling flow of the present embodiment. FIG. 20 is a schematic exploded view showing another cleaning nozzle that injects the swirl flow of the present embodiment.

As described above with reference to FIGS. 17 and 18, the swirl flow is classified as a dispersed flow.
As illustrated in FIG. 19, the piston portion 530 of the cleaning nozzle 473 f includes a nozzle cover 531, a two-passage pipe 532, a one-passage pipe 533, and a flow-path joining part 534. In FIG. 19, the nozzle cover 531 is indicated by a broken line. As shown in FIG. 20, a sixth water discharge port 474 f is provided on the upper surface of the tip portion of the nozzle cover 531.

  The two-channel pipe 532 has two channels through which the washing water flows. One channel is connected to the rear end of one channel tube 533, and the channel merging portion 534 is connected to the tip of one channel tube 533. In addition, as illustrated in FIG. 19, the nozzle cover 531 covers the two flow path pipes 532, the one flow path pipe 533, and the flow path junction 534.

  The washing water supplied to one flow path of the two flow path pipes 532 is supplied to the flow path junction 534 through the one flow path pipe 533. The washing water supplied to the other flow path of the two flow path pipes 532 passes through the space between the one flow path pipe 533 and the nozzle cover 531 and is supplied to the flow path junction 534. The washing water supplied to the flow path junction 534 is ejected from the sixth water outlet 474f toward the human body. The washing water sprayed at this time becomes a dispersed swirl flow.

FIG. 21 is a schematic perspective view showing another cleaning nozzle that ejects the swirl flow of the present embodiment. FIG. 22 is a schematic diagram illustrating another cleaning nozzle that injects a swirling flow according to the present embodiment.
FIG. 22A is a schematic plan view of the cleaning nozzle. FIG. 22B is a schematic cross-sectional view taken along the cutting plane MM shown in FIG. FIG. 22C is a schematic cross-sectional view taken along the cutting plane NN illustrated in FIG.

As described above with reference to FIGS. 17 and 18, the swirling jet (swirling flow) is classified as a dispersed flow.
The cleaning nozzle 473g shown in FIG. 21 has a direct jet outflow passage 542 for forming the direct jet flow 541 and a direct jet inflow passage 543 for introducing cleaning water into the direct jet outflow passage 542. Further, the cleaning nozzle 473g forms a swirl jet (swirl flow) 544, and therefore a swirl flow forming chamber 545 formed around the direct jet flow inflow path 543 and a swirl for introducing cleaning water into the swirl flow forming chamber 545. A flow inflow channel 546. Furthermore, an air mixing means 547 for mixing air into the direct jet flow 541, a seventh water discharge port 474g for simultaneously discharging the direct jet flow 541 and the swirling jet 544, and a cleaning water inflow for introducing cleaning water from the upstream side Path 548.

  As shown in FIG. 22B, the air mixing unit 547 includes an air flow path 549. As shown in FIG. 22C, the direct jet inlet 543 a is provided in the direct jet inflow path 543. A swirl flow inlet 546 a is provided in the swirl flow inflow path 546.

In the cleaning nozzle 473g, the cleaning water flows from the upstream side through the cleaning water inflow passage 548, and then is branched into the direct jet flow inflow passage 543 and the swirling flow inflow passage 546. The wash water branched into the direct jet flow inflow path 543 flows toward the seventh water discharge port 474g. The direction of the washing water flowing toward the seventh water discharge port 474g changes. After the washing water reaches the direct jet outflow passage 542, the air is mixed by the air mixing means 547 and flows to the seventh water discharge port 474g.
On the other hand, the wash water branched to the swirl flow inflow path 546 reaches the swirl flow forming chamber 545 to obtain swirl force, and then reaches the seventh water discharge port 474g. The washing water branched into the direct jet flow inflow path 543 and the swirl flow inflow path 546 both reaches the seventh water discharge port 474g. The direct jet 541 is discharged from the central portion of the seventh water discharge port 474g while keeping the flow. The swirling jet 544 is discharged while maintaining a flow from the inner peripheral edge portion of the seventh water discharge port 474g. The swirling jet 544 is discharged simultaneously with the direct jet 541.
At this time, the direct jet flow 541 has a flow direction substantially along the central portion of the seventh water discharge port 474g. The swirling jet 544 has a flow direction substantially along the inner peripheral edge of the seventh water discharge port 474g. Therefore, the direct jet 541 and the swirl jet 544 can discharge water while maintaining their respective flowing directions without being mixed with each other.

FIG. 23 is a schematic plan view illustrating a cleaning nozzle that injects a dispersed jet according to the present embodiment.
24 is a schematic cross-sectional view taken along the section JJ shown in FIG.

In the present embodiment, the dispersed jet is classified as a dispersed flow.
The cleaning nozzle 473h that ejects the dispersed jet includes a direct injection nozzle hole 551 that discharges the concentrated cleaning jet, a dispersion nozzle hole (eight spout) 474h that discharges the dispersed jet, and the direct injection nozzle hole 551 and the dispersion nozzle hole. A first flow path 28a and a second flow path (eighth flow path in the nozzle) 28b respectively communicating with 474h. The central axis of the direct injection nozzle hole 551 intersects with the central axis of the dispersion nozzle hole 474h in the vicinity of the portion to be cleaned. A flow path switching valve (not shown) that selectively supplies cleaning water to either the first flow path 28a or the second flow path 28b is provided on the upstream side of the cleaning nozzle 473h.

  For example, when a switch for cleaning the anus is turned on, the cleaning nozzle 473h is driven to advance from the retracted position to the anal cleaning position. On the other hand, the flow path switching valve is controlled simultaneously, and the flow path is switched to the second flow path 28b side. Thereafter, a water stop valve (not shown) is opened, and cleaning water (dispersed jet) is jetted from the dispersing nozzle hole 474h toward the anus. Thereby, cleaning is started by the dispersed soft cleaning mode.

  Alternatively, for example, when a switch for bidet cleaning is turned on, the cleaning nozzle 473h is driven to advance from the retracted position to the bidet cleaning position. At the same time, the flow path switching valve is controlled to switch the flow path to the second flow path 28b side. Thereafter, a water stop valve (not shown) is opened, and cleaning water (dispersed jet) is jetted from the dispersed nozzle hole 474h toward the female local area. Thereby, cleaning is started by the dispersed soft cleaning mode.

FIG. 25 and FIG. 26 are schematic views showing the cleaning nozzle that ejects the fan-shaped water flow of the present embodiment.
Note that FIG. 25A is a schematic cross-sectional view taken along a cut surface KK illustrated in FIG. FIG. 25B is a schematic plan view seen from the water outlet of the cleaning nozzle. FIG. 26 is a schematic plan view seen from the tip of the cleaning nozzle.

In the present embodiment, the fan-shaped water flow is classified as a dispersed flow.
In the cleaning nozzle 473i that ejects the fan-shaped water flow, air is mixed into the water flow by an air pump (not shown), for example. The water stream mixed with air (gas-liquid mixed water) is ejected from the cleaning nozzle 473i. The mixing of air is controlled by a bubble mixing control valve (not shown). Alternatively, the amount of air can be adjusted by the operation of the air pump.

  The cleaning nozzle 473i has a flow path as shown in FIGS. 25 and 26, and ejects a fan-shaped thin film flow. That is, the ninth in-nozzle flow path 29 upstream of the ninth water discharge port 474i has a structure in which a portion immediately before the opening of the water discharge port is formed in a spherical shape. The water stream flows along the wall surface 29a toward the center. As shown in FIG. 26, the fluid balance of the flow toward the center is distributed in a layered manner at the ninth water discharge port 474i cut into a V shape. And a fan-shaped water flow is injected. Here, since air is mixed in the water flow, the fan-shaped water flow injected from the ninth water discharge port 474i is a portion of the water droplet 561 (or water mass) as shown in FIGS. And an air layer 562 are formed to form ring-shaped water droplets.

FIG. 27 is a schematic plan view showing a state where the cleaning nozzle of this embodiment is sprayed.
FIG. 28 is a schematic diagram illustrating a cleaning nozzle for spraying according to the present embodiment.
Note that FIG. 28A is a schematic cross-sectional view taken along the cutting plane LL shown in FIG.

In the present embodiment, the spray spray is classified as a dispersed flow.
The cleaning nozzle 473j for spraying is fixed to the tip of the nozzle pipe 571 communicating with the water supply passage by screwing or the like.

  As shown in FIG. 28A, the tenth in-nozzle passage 31 that communicates with the nozzle pipe 571 is provided upstream in the cleaning nozzle 473 j. A collision plate 571b is disposed downstream of the tenth nozzle flow path 31. A bending having a first hole 571c extending in the axial direction and a second hole 571d extending radially inward from the tip of the first hole 571c at a plurality of locations outside the collision plate 571b. A hole 571e is formed. The outlets of the respective bending holes 571e communicate with discharge chambers 571f provided downstream from the collision plate 571b. A slit discharge port (tenth water discharge port) 474j is provided at the tip of the discharge chamber 571f via an orifice portion 571g. Here, the inner diameter dimension D11 of the discharge chamber 571f gradually decreases from the front position 571j of the orifice portion 571g toward the orifice portion 571g. In the orifice portion 571g, the inner diameter dimension D12 (<D11) is minimized. The inner diameter dimension D13 (> D12) gradually increases from the orifice portion 571g toward the leading slit discharge port 474j. As a result, the water supplied from the nozzle pipe 571 to the tenth in-nozzle channel 31 collides with the collision plate 571b as indicated by the arrow X shown in FIG. It is distributed to the holes 571e. The water distributed to the bent holes 571e is changed in direction by the bent holes 571e and merges in the discharge chamber 571f. Thereafter, the water merged in the discharge chamber 571f is once squeezed by the orifice portion 571g on the front end side of the discharge chamber 571f, and then discharged at once from the slit discharge port 474j on the front end side. As a result, the mist M is sprayed from the slit discharge port 474j at a predetermined angle.

  Here, “mist M” in the specification of the present application is generally a particle larger than a mist formed by condensation of water vapor in the air and formed into fine water droplets, and a particle finer than a shower water flow from a normal washing nozzle. Say. Compared with the normal shower water flow sprayed from a normal washing nozzle, comfort is obtained gently on the skin.

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, dimensions, material, arrangement, etc. of each element included in the cleaning nozzle 473 and the like, the installation form of the water discharger 474, and the like are not limited to those illustrated, and can be changed as appropriate.
In the control operation described above with reference to FIG. 4, the flow rate of water ejected from the water discharger 474 is adjusted while maintaining a straight flow by switching the water washing mode to either pulsating flow or foam flow. However, the method of adjusting the flow rate is not limited to this. For example, the flow rate of water ejected from the water discharger 474 may be adjusted while maintaining the water cleaning mode in a pulsating flow (straight forward flow). Alternatively, for example, the flow rate of water ejected from the water discharger 474 may be adjusted while maintaining the water washing form in a foam flow (straight forward flow). Alternatively, for example, the flow rate of water ejected from the water discharger 474 may be adjusted while maintaining the water cleaning form in a mist flow (dispersed flow).
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.

  10 water supply source, 20 flow path, 21 first nozzle flow path, 22 second nozzle flow path, 23 third nozzle flow path, 24 fourth nozzle flow path, 24a water flow path, 24b swirl Chamber inlet channel, 25a first channel, 25b second channel (fifth nozzle channel), 28a first channel, 28b second channel (eight nozzle channel), 29th 9 nozzle flow path, 29a wall surface, 31 10th nozzle flow path, 100 sanitary washing device, 200 toilet seat, 300 toilet lid, 310 transmission window, 400 casing, 401 power supply circuit, 402 entry detection sensor, 403 human body detection Sensor, 404 seating detection sensor, 405 control unit, 407 exhaust port, 408 discharge port, 409 recessed portion, 411 nozzle body, 412 first swirl chamber, 412a large-diameter inner peripheral wall, 12b Inclined inner peripheral wall, 413 projecting portion, 414 communication passage, 415 throat, 416 throat flow path, 417 taper portion, 421 water supply chamber, 422 orifice portion, 423 air suction portion, 424 throat portion, 431 solenoid valve, 440 heat exchange Unit, 450 electrolyzer unit, 460 water reservoir, 460a air inlet, 460b injection port, 460c water reservoir side opening, 460d secondary water flow inlet, 460e, 460f, 460g, 460h, 460i, 460j wall, 461 air conduit 462, first water supply pipe, 463 discharge pipe, 464 second water supply pipe, 465 water flow path, 466 water reservoir, 471 flow rate switching valve, 472 flow path switching valve, 473, 473a, 473b, 473c, 473d 473e, 473f, 473g, 473h 473i, 473j Cleaning nozzle, 474 water outlet, 474a first water outlet, 474b second water outlet, 474c third water outlet, 474d fourth water outlet, 474e fifth water outlet, 474f sixth water outlet Water outlet, 474g seventh water outlet, 474h dispersion nozzle hole (eight water outlet), 474i ninth water outlet, 474j slit outlet (tenth water outlet), 476 nozzle motor, 478 nozzle cleaning chamber, 481 Second swirl chamber, 482 water discharger, 482a water discharge part, 483 force receiving part, 484 water supply conduit, 485 seal part, 486 taper guide part, 491 first opening part, 492 second opening part, 493 circular chamber , 500, 500a, 500b operation unit, 501 “stop” switch, 502 “wet” switch, 503 "Bidet" switch, 504 "Soft" switch, 505 "Dry" switch, 510 "Water" switch, 511 "Weak" switch ("-" switch), 512 "Strong" switch ("+" switch), 530 Piston section , 531 Nozzle cover, 532 Two-channel pipe, 533 One-channel pipe, 534 Channel confluence, 541 Direct jet flow, 542 Direct jet flow outflow channel, 543 Direct jet flow inflow channel, 543a Direct jet flow inlet, 544 Swirling jet, 545 Swirling flow Formation chamber, 546 swirl flow inlet, 546a swirl flow inlet, 547 air mixing means, 548 washing water inflow passage, 549 air flow path, 551 direct injection nozzle hole, 561 water droplet, 562 air layer, 571 nozzle pipe, 571b Collision plate, 571c first hole, 571d second hole, 571e bent hole 571f Discharge chamber, 571g Orifice part, 571j Front position, 610 Hollow conical water discharge, 620 Granulated water flow, 800 Toilet bowl, 801 bowl

Claims (5)

A cleaning nozzle that has a water discharger, and jets water from the water discharger to wash the user's body;
A flow path for guiding water supplied from a water supply source to the washing nozzle;
An instantaneous heat exchanger provided in the flow path for raising the temperature of water supplied from the water supply source;
A flow rate adjusting means for adjusting a flow rate of water that is provided in the flow path and flows to the cleaning nozzle;
An injection form adjusting means for adjusting an injection form of water injected from the water discharge part;
Instructing means for instructing a change in the water jet sprayed from the water discharger based on a user's operation;
When an instruction to change the water force output from the instruction means is input, the flow rate adjusting means is controlled to keep the flow rate of water passing through the instantaneous heat exchanger constant, and the injection mode adjusting means is controlled to and control means for adjusting the water force by adjusting the flow rate of water ejected from the water discharge portion while maintaining the straight flow,
A sanitary washing device characterized by comprising:   The injection form adjusting means adjusts the flow rate of water injected from the water discharger by switching between a pulsating flow to which pulsation having a fluctuation in flow velocity is given and a continuous flow to which the pulsation is not given. The sanitary washing device according to claim 1, wherein the device is a sanitary washing device. The water discharger is
A first spout for jetting the pulsating flow;
A second spout for jetting the continuous flow;
Have
The washing nozzle is
A first in-nozzle channel that is connectable to the channel and guides the water to the first water outlet;
A second in-nozzle channel that is connectable to the channel and guides the water to the second water outlet;
Have
The injection form adjusting means has flow path switching means for switching a connection destination of the flow path to either the first nozzle flow path or the second nozzle flow path, and the flow path switching means The sanitary washing device according to claim 2, wherein the water discharge unit that jets the water by switching the connection destination is switched to either the first water discharge port or the second water discharge port.   The said control means, when starting injection of the said water from the said water discharging part, starts from the injection of the said injection form of the relatively high flow rate among the flow rates of the water injected from the said water discharging part. Item 4. The sanitary washing device according to any one of Items 1 to 3.   The said control means, when starting injection of the said water from the said water discharging part, starts from the injection of the said injection form of a relatively slow flow rate among the flow rates of the water injected from the said water discharging part. Item 4. The sanitary washing device according to any one of Items 1 to 3.

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