JP2019132051A - Sanitary washing device - Google Patents

Abstract

To provide a sanitary washing device which can suppress the increase in the space where a flow path is arranged, and can improve maintainability.SOLUTION: There is provided a sanitary washing device comprising: a nozzle which consists of a nozzle body and a nozzle head which includes a water outlet for discharging water that is detachable from the nozzle body and a flow path for supplying water to the water outlet; and a flow path switching valve that is provided upstream of the nozzle and switches between water flow and water stop of the flow path, wherein the flow path of the nozzle head has a first water channel, a second water channel that merges with the first water channel, and a third water channel that branches into the first water channel and the second water channel.SELECTED DRAWING: Figure 3

Description

  Aspects of the invention generally relate to a sanitary washing apparatus.

  In a sanitary washing device that discharges water from a nozzle and cleans a human body part, the flow path of water may branch into a plurality of flow paths at the flow path switching unit. The plurality of channels branched in the channel switching unit are connected to, for example, any of a plurality of water discharge ports provided at the tip of the nozzle. The water supplied to the sanitary washing apparatus is supplied to the flow path selected by the flow path switching unit among the plurality of branched flow paths, and is discharged to the outside.

  The flow paths branched in the flow path switching unit may be merged on the downstream side and connected to one water outlet. For example, in the water discharge device described in Patent Document 1, the water flowing through the first water supply channel and the water flowing through the second water supply channel merge at the water reservoir, and then are discharged to the outside through the water discharge conduit. The Thereby, the flow rate of water discharge can be changed, and a feeling of washing can be improved.

Japanese Patent No. 581664

  When the flow path branches at the flow path switching unit, the space required for arranging the flow paths increases according to the number of branched flow paths. For this reason, there exists a possibility that the structure of a flow path may become complicated or arrangement | positioning of a flow path may become difficult. In particular, recent sanitary washing apparatuses are provided with many forms of water discharge, such as butt washing and bidet washing. When the flow path is branched according to each water discharge form, the number of branched flow paths increases, and the arrangement of the flow paths may be difficult. Therefore, it is required to reduce the space for arranging the flow path.

  In addition, when the flow path is branched into a plurality of flow paths in the flow path switching section, the structure of the flow path switching section may be complicated, or the diameter of the flow path may be reduced at the branch point, which may easily cause clogging of the scale. . The flow path switching unit is provided, for example, inside a sanitary washing device upstream of the nozzle, so that the scale is removed by cleaning the flow path switching unit, or the flow path clogged with the scale is replaced. Maintenance may be difficult.

  The present invention has been made based on the recognition of such a problem, and an object of the present invention is to provide a sanitary washing apparatus that can suppress an increase in a space for arranging a flow path and improve maintainability.

  1st invention is a nozzle which has a nozzle main body, a nozzle head which can be attached or detached to the nozzle main body, and has a water outlet which discharges water, and a channel which supplies water to the water outlet, A flow path switching valve that is provided on the upstream side of the nozzle and switches between water flow and water stop of the flow path, and the flow path of the nozzle head joins the first water path and the first water path. The sanitary washing device is characterized by having a second water channel and a third water channel that branches into the first water channel and the second water channel.

According to this sanitary washing device, the flow path for supplying water to the water discharge port joins after branching in the nozzle head provided on the downstream side of the flow path switching valve. Thereby, the increase in the space which arrange | positions a flow path can be suppressed upstream from a nozzle head. In addition, the structure of the flow path switching unit can be simplified and the increase in size of the flow path switching unit can be suppressed as compared with the case where the flow path switching unit branches the flow path. Moreover, in the flow path switching unit, it is possible to suppress the diameter of the flow path from becoming narrow due to the branching of the flow path and clogging the scale.
Further, in the nozzle head, even when the diameter of the flow path is narrowed due to the branching of the flow path and the scale is clogged, only the detachable nozzle head can be removed to perform cleaning (scale removal) or replacement. Thereby, maintainability can be improved.

  In a second aspect based on the first aspect, the flow path of the nozzle has a water reservoir chamber, the second water path has an orifice part that restricts the flow rate of water flowing through the second water path, The sanitary washing device is characterized in that the water discharged from the water discharge port pulsates when the water flowing through the first water channel and the water flowing through the second water channel join together in the water storage chamber.

  According to this sanitary washing device, by restricting the flow rate of the second water channel by the orifice portion, the flow rate of water flowing from the first water channel to the water reservoir chamber, the flow rate of water flowing from the second water channel to the water reservoir chamber, The balance can be adjusted. Thereby, the water discharged from a water discharge port can be made into a pulsating flow. In addition, even if the scale is clogged due to the narrow diameter of the second water channel in the orifice portion, the nozzle head can be removed, so that maintenance is easy.

  In a third aspect based on the second aspect, the second water channel has a pressure chamber provided on the downstream side of the orifice portion, and the pressure chamber decelerates water flowing through the second water channel. This is a sanitary washing device.

  According to this sanitary washing device, the water flowing into the water reservoir chamber from the second water channel can be decelerated by providing the pressure chamber in the second water channel. Thereby, the period of the pulsating flow discharged from the water outlet can be optimized.

  A fourth invention is the sanitary washing apparatus according to the third invention, wherein the orifice portion is located at an inlet of the second water channel.

  According to this sanitary washing device, the pressure chamber can be enlarged, and the speed of water flowing into the water reservoir chamber from the second water channel can be lowered more reliably. Thereby, the pulsating flow of the optimal period can be produced | generated more reliably.

  According to a fifth aspect of the present invention, in any one of the second to fourth aspects, the direction in which the water flowing from the second water channel into the water reservoir chamber flows is the amount of water flowing from the third water channel into the second water channel. It is a sanitary washing device characterized by being opposite to the direction of flow.

  According to this sanitary washing device, the speed of water flowing from the second water channel into the water reservoir can be reliably reduced by the pressure loss when the direction of water flow in the second water channel is reversed. Thereby, the pulsating flow of the optimal period can be produced | generated more reliably.

  According to the aspect of the present invention, there is provided a sanitary washing device that can suppress an increase in a space for arranging a flow path and improve maintainability.

It is a perspective view showing the toilet apparatus provided with the sanitary washing apparatus which concerns on embodiment. It is a perspective view which illustrates the nozzle of the sanitary washing device concerning an embodiment. It is a mimetic diagram which illustrates the composition of the sanitary washing device concerning an embodiment. It is sectional drawing which illustrates the nozzle of the sanitary washing apparatus which concerns on embodiment. FIG. 5A to FIG. 5D are cross-sectional views illustrating the operation of the nozzle of the sanitary washing device according to the embodiment. It is sectional drawing which illustrates the nozzle of the sanitary washing apparatus which concerns on embodiment. FIG. 7A and FIG. 7B are schematic views illustrating the flow path switching unit of the sanitary washing device according to the 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 perspective view illustrating a toilet apparatus including a sanitary washing device according to an embodiment.
As shown in FIG. 1, the toilet apparatus includes a Western-style toilet bowl (hereinafter simply referred to as “toilet bowl”) 800 and a sanitary washing apparatus 100 provided thereon. The toilet bowl 800 may be “floor-placed” installed on the floor surface of the toilet room, or may be “wall-mounted” installed on the wall surface or lining of the toilet room. 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.

  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”. For example, the body washing function unit has a washing nozzle (hereinafter simply referred to as “nozzle”) 473. For example, when the user operates a remote controller or the like, the nozzle 473 can be advanced from the casing 400 into the bowl 801 of the toilet bowl 800. In the sanitary washing device 100 shown in FIG. 1, the nozzle 473 has entered the bowl 801. In a state where the nozzle 473 has advanced into the bowl 801, the nozzle 473 discharges water toward the human body local part to clean the human body local part.

  In the present specification, “water” includes not only cold water but also heated hot water. Further, in the present specification, “front”, “rear”, “upper”, and “lower” refer to directions viewed from a user sitting on the toilet seat 200 with the back facing the opened toilet lid 300. .

FIG. 2 is a perspective view illustrating a nozzle of the sanitary washing device according to the embodiment.
As illustrated in FIG. 2, the nozzle 473 includes a nozzle body 474 and a nozzle head 475. The nozzle head 475 is the tip (front end) of the nozzle 473.
The nozzle head 475 is provided with a plurality of water outlets 31 (such as a buttocks washing water outlet 31a, a soft washing water outlet 31b, and a bidet washing water outlet 31c) that discharge water to a human body local part. Further, the nozzle head 475 has a flow path for supplying water to the water discharge ports 31 inside.

  The nozzle 473 can wash the female local area of the woman sitting on the toilet seat 200 by injecting water from the bidet washing spout 31c or the soft washing spout 31b. In addition, the nozzle 473 can wash the “butt” of the user sitting on the toilet seat 200 by spraying water from the buttocks washing spout 31a.

  The nozzle head 475 is detachable from the nozzle body 474. For example, a part of the outline of the nozzle head 475 is made of resin, and the nozzle head 475 can be fitted into the nozzle body 474 or removed from the nozzle body 474 by snap fitting. That is, for example, the nozzle head 475 has an engaging portion (a convex portion or the like) formed of resin, and the engaging portion engages with a part (a concave portion or the like) of the nozzle main body 474, so that the nozzle body It is attached to 474. The attachment / detachment method of the nozzle head 475 is not limited to the snap fit, and any attachment / detachment method such as other fitting or screwing can be used. For example, the nozzle head 475 may be fixed to the nozzle body 474 using a screw.

  In this example, the nozzle head 475 is provided with a spray water spouting port 33. The nozzle 473 sprays cleaning water and functional water (for example, sterilized water such as electrolyzed water and hypochlorous acid water) from the spray water outlet 33 into the bowl 801 in a mist form.

FIG. 3 is a schematic view illustrating the configuration of the sanitary washing device according to the embodiment.
FIG. 3 schematically shows a flow path for supplying water to the nozzle 473. In the flow path in the casing 400 of the sanitary washing device 100, a water supply path 20, a flow path switching unit 472, and a nozzle 473 are provided in order from the upstream side. Note that an electromagnetic valve, a pressure regulating valve, a check valve, a pump, a heat exchange unit, an electrolytic cell unit, a vacuum breaker, and the like may be appropriately provided on the flow path.

  The water supply path 20 guides the water supplied from the water supply source 10 such as a water supply or a water storage tank to the flow path switching unit 472. On the downstream side of the flow path switching unit 472, a plurality of flow paths (wet cleaning flow path 51, soft cleaning flow path 52, bidet cleaning flow path 53, and spray flow path 54) are provided. In other words, the water supply channel 20 is branched into a plurality of channels (the buttocks cleaning channel 51, the soft cleaning channel 52, the bidet cleaning channel 53, and the spray channel 54) in the channel switching unit 472. Each of the plurality of flow paths passes through the nozzle body 474 and reaches the nozzle head 475.

The nozzle head 475 has a first flow path 61, a second flow path 62, a third flow path 63, and a fourth flow path 64.
The first channel 61 is connected to the downstream side of the buttocks cleaning channel 51 and communicates with the buttocks cleaning water outlet 31a. The 1st flow path 61 guides the water supplied from the buttocks washing flow path 51 to the buttocks washing discharge port 31a.
The second flow path 62 is connected to the downstream side of the soft cleaning flow path 52 and communicates with the soft cleaning water discharge port 31b. The second flow path 62 guides the water supplied from the soft cleaning flow path 52 to the soft cleaning spout 31b.
The third channel 63 is connected to the downstream side of the bidet cleaning channel 53 and communicates with the bidet cleaning spout 31c. The third channel 63 guides the water supplied from the bidet cleaning channel 53 to the bidet cleaning spout 31c.
The fourth flow path 64 is connected to the downstream side of the spray flow path 54 and communicates with the spray water spouting port 33. The fourth flow path 64 guides the water supplied from the spray flow path 54 to the spray water spouting port 33.

  The flow path switching unit 472 opens / closes and switches the water supply to each of the buttocks cleaning water outlet 31 a, the soft cleaning water outlet 31 b, the bidet cleaning water outlet 31 c, and the spray water outlet 33. That is, the flow path switching unit 472 switches between the water flow and the water stop of each of the buttocks cleaning flow path 51, the soft cleaning flow path 52, the bidet cleaning flow path 53, and the spray flow path 54. For example, in the flow path switching unit 472, the state in which the first flow path 61 is made to flow and the other flow path (for example, the second flow path 62, the third flow path 63, or the fourth flow path 64) are made to flow. Switch between the state to be performed.

  As such a flow path switching unit 472, for example, a switching valve having a fixed disk and a movable disk can be used (see FIG. 7). However, the flow path switching unit 472 is not limited to this, and may have any configuration that can switch opening and closing of a plurality of flow paths, such as a three-way valve. For example, the flow path switching unit 472 also functions as a flow rate adjusting unit that adjusts the flow rate. However, the flow rate adjustment unit and the flow path switching unit may be separate units.

  In the embodiment, the first channel 61 includes a first water channel 61a, a second water channel 61b, and a third water channel 61c. The third water channel 61c is provided on the upstream side of the first water channel 61a and the second water channel 61b, and branches into the first water channel 61a and the second water channel 61b. The first water channel 61a and the second water channel 61b merge at the downstream side.

  That is, the water supplied to the nozzle head 475 through the buttocks cleaning channel 51 passes through either the first water channel 61a or the second water channel 61b after passing through the third water channel 61c. Thereafter, the water that has passed through one of the first water channel 61a and the second water channel 61b merges with the water that has passed through the other of the first water channel 61a and the second water channel 61b, and is discharged from the buttocks washing spout 31a.

  Thus, the water discharge form (flow velocity, flow rate, etc.) can be changed by discharging after the water which passed through two or more flow paths merges. For example, the water discharged from the buttocks washing spout 31a can be a pulsating pulsating flow. Note that pulsation means a state in which a fast flow state and a slow flow state are alternately repeated in time. For example, in a pulsating flow, the flow velocity changes periodically. However, in the embodiment, the water discharged from the buttocks cleaning water discharge port 31a is not necessarily a pulsating flow. In addition, the range in which the two flow paths are joined is not limited to the case where the two flow paths are directly connected, but the two flow paths are connected via another flow path or the like (for example, a water reservoir chamber described later). Including the case of connection.

  In the discharged water where the conventional flow paths merge, the flow paths merge at the nozzle head after branching at the flow path switching unit, for example. In this case, between the downstream side of the flow path switching unit and the nozzle head, the space required for arranging the flow paths increases due to an increase in the number of flow paths due to branching. For this reason, there exists a possibility that the structure of a flow path may become complicated or arrangement | positioning of a flow path may become difficult.

  On the other hand, in the embodiment, the first flow path 61 that supplies water to the buttocks cleaning water discharge port 31a merges after branching in the nozzle head 475 provided on the downstream side of the flow path switching unit 472. . Thereby, the increase of the space which arrange | positions a flow path can be suppressed upstream from the nozzle head 475. Further, as compared with the case where the flow path switching unit 472 branches the flow path, the structure of the flow path switching unit 472 can be simplified, and the increase in the size of the flow path switching unit 472 can be suppressed.

  Moreover, the water (for example, tap water) supplied from a water supply source may contain sodium, calcium, potassium, magnesium, etc. For this reason, the scale (for example, calcium carbonate etc.) which has sodium, calcium, potassium, magnesium, etc. as a main component may precipitate in a channel. When the scale is deposited, the scale may clog the flow path. In general, the scale tends to be clogged in a portion having a small diameter in the flow path. When the flow path switching unit is divided into a plurality of flow paths, the structure of the flow path switching unit becomes complicated, or the diameter of the flow path becomes small at the branch point, so the scale is easily clogged in the flow path switching unit. There is a fear.

  On the other hand, in the embodiment, since the first flow path 61 branches in the nozzle head 475, in the flow path switching unit 472, it is possible to suppress a complicated structure or a decrease in the diameter of the flow path, It is possible to suppress the clogging of the scale.

  In addition, since the flow path switching unit is provided inside the casing, in order to clean the flow path switching unit and remove the scale, or to replace the flow path clogged with the scale, the casing is opened and sanitary cleaning is performed. The device will be disassembled. For this reason, it takes time for maintenance, or maintenance is difficult.

  On the other hand, in the embodiment, the first flow path 61 is branched at the nozzle head 475 and the nozzle head 475 is detachable from the nozzle body 474. For this reason, even if the scale is clogged in the first flow path 61, only the removable nozzle head 475 can be removed for cleaning (scale removal) or replacement of the nozzle head 475. Thereby, maintainability can be improved.

FIG. 4 is a cross-sectional view illustrating the nozzle of the sanitary washing device according to the embodiment.
The cross-sectional view shown in FIG. 4 corresponds to the cross section taken along line AA shown in FIG.
In the example of FIG. 4, the first flow path 61 includes a water reservoir chamber 93 and a water discharge conduit 94 in addition to the first to third water paths 61 a to 61 c described above.

  The water reservoir chamber 93 is provided downstream of the first water channel 61a and the second water channel 61b. The water reservoir chamber 93 is a portion where the flow path becomes wider than the first water channel 61a and the second water channel 61b. That is, the diameter of the water reservoir chamber 93 is larger than the diameter of the first water channel 61a and larger than the diameter of the second water channel 61b. For example, the cross-sectional area of the water reservoir 93 (area in the cross section perpendicular to the water discharge direction D1) is larger than the cross-sectional area of the first water channel 61a (area in the cross section perpendicular to the water discharge direction D1), and the cross-sectional area of the second water channel 61b. It is larger than (area in a cross section perpendicular to the water discharge direction D1). The water discharge direction D1 is a direction in which water is discharged from the buttocks cleaning water discharge port 31a.

  The first water channel 61 a and the second water channel 61 b are connected (joined) via a water reservoir chamber 93. That is, the water flowing through the first water channel 61 a and the water flowing through the second water channel 61 b merge in the water reservoir chamber 93.

  Further, an air duct 95 is provided to connect the opening (not shown) opened to the atmosphere and the water reservoir chamber 93. Air is drawn into the water reservoir chamber 93 from the air duct 95.

  The water discharge pipe 94 is provided on the downstream side of the water reservoir chamber 93 and communicates with the buttocks cleaning water discharge port 31a. That is, the water that has flowed into the water reservoir 93 passes through the water discharge conduit 94 and is then discharged from the buttocks cleaning water discharge port 31a.

  The first water channel 61a and the water discharge conduit 94 each extend along the water discharge direction D1. Moreover, the 1st water channel 61a and the water discharging conduit 94 are arrange | positioned on the same axis | shaft extended in the water discharging direction D1.

  The first water passage 61a and the water discharge pipe 94 are arranged so as to be close to one side of the substantially rectangular (rectangular) water reservoir chamber 93. On the other hand, the second water channel 61 b and the air pipe channel are disposed so as to be close to the other side of the substantially rectangular water reservoir chamber 93.

FIG. 5A to FIG. 5D are cross-sectional views illustrating the operation of the nozzle of the sanitary washing device according to the embodiment.
FIGS. 5A to 5D correspond to enlarged views in the vicinity of the water reservoir chamber 93 shown in FIG.
As shown to Fig.5 (a), the 1st water channel 61a is a part where a flow path becomes narrow compared with the 3rd water channel 61c. That is, the diameter of the first water channel 61a is smaller than the diameter of the third water channel 61c. For example, the cross-sectional area of the first water channel 61a (area in the cross section perpendicular to the water discharge direction D1) is smaller than the cross-sectional area of the third water channel 61c (area in the cross section perpendicular to the water discharge direction D1). For this reason, the water supplied from the 1st waterway 61a is inject | poured in the water reservoir chamber 93 as the jet flow WSm. The jet WSm travels in the water reservoir chamber 93 along the water discharge direction D <b> 1 and enters the water discharge pipe 94. Therefore, in the water reservoir chamber 93, a water flow path portion 96 that is a path through which the jet WSm passes is formed. The water that has entered the water discharge conduit 94 travels along the water discharge direction D1 in the water discharge conduit 94, and is discharged from the buttocks washing spout 31a.

  The traveling direction of the water flowing into the water reservoir chamber 93 from the second water channel 61b is, for example, the opposite direction (downward) from the water discharge direction D1. At least a part of the water supplied from the second water channel 61 b forms a sub-water flow WSs that is a swirling flow in the water reservoir chamber 93.

  By adjusting the flow rate and flow velocity of the water flowing in from the first water channel 61a and the water flowing in from the second water channel 61b, the water discharged from the buttocks cleaning water discharge port 31a can be made a pulsating flow. For example, the speed of water flowing into the water reservoir chamber 93 from the second water channel 61b is lower than the speed of water flowing into the water reservoir chamber 93 from the first water channel 61a. The flow rate of water flowing into the water reservoir chamber 93 from the second water channel 61b is smaller than the flow rate of water flowing into the water reservoir chamber 93 from the first water channel 61a.

  As shown in FIG. 5A, the air drawn into the water reservoir chamber 93 from the air pipe 95 forms bubbles BA. When a further time elapses from the state shown in FIG. 5A, as shown in FIG. 5B, the bubbles BA are drawn into the water reservoir chamber 93 and are torn off by the auxiliary water flow WSs. The bubble BA is affected by the buoyancy and the force pressed against the inner wall of the water reservoir chamber 93 by the sub-water stream WSs, and the bubble BA approaches the jet WSm. Then, the bubble BA is pulled by the jet WSm and enters the water flow path portion 96.

  Thereafter, as shown in FIG. 5C, the bubble BA is further drawn into the jet WSm. In this state, the jet WSm is surrounded by the bubbles BA. For example, the jet WSm penetrates the bubble BA.

  When the time further elapses, as shown in FIG. 5 (d), the bubbles BA are drawn into the jet WSm and go to the water discharge line 94. The bubble BA enters the water discharge pipe 94 while being pushed from behind by the jet WSm or pushed by the pressure of water in the water reservoir chamber 93. Thereafter, the bubbles BA are discharged to the outside from the buttocks cleaning water discharge port 31a.

  The operations described with reference to FIGS. 5A to 5D are periodically repeated. For example, the jet WSm injected into the water reservoir chamber 93 travels away from the water in the water reservoir chamber 93. For this reason, the jet WSm receives the resistance due to the water in the water reservoir chamber 93 and decelerates. In the state of FIG. 5A, the jet WSm is surrounded by the water in the water reservoir chamber 93, so that the resistance to decelerate the jet WSm is large. On the other hand, in the states of FIG. 5C and FIG. 5D, the jet WSm is surrounded by the bubbles BA, so that the resistance to decelerate the jet WSm is small. Therefore, a state where the water flow resistance of the jet WSm is large and the flow velocity is low and a state where the water flow resistance of the jet flow WSm is small and the flow velocity is high repeatedly occur. Thereby, the water discharged from the buttocks washing spout 31a pulsates.

FIG. 6 is a cross-sectional view illustrating the nozzle of the sanitary washing device according to the embodiment.
6 corresponds to an enlarged view of the vicinity of the second water channel 61b and the water reservoir chamber 93 shown in FIG.
As shown in FIG. 6, the second water channel 61 b includes an orifice portion 91, a pressure chamber 92, and a pipe 97.

  For example, the orifice portion 91 is located at the inlet of the second water channel 61b. That is, the orifice portion 91 is a portion provided adjacent to the third water passage 61c, and the water flowing through the third water passage 61c flows into the second water passage 61b through the orifice portion 91.

  The second water channel 61b is a portion where the flow channel becomes narrower than the third water channel 61c. That is, the cross-sectional area of the orifice portion 91 (area in the cross section perpendicular to the direction D2) is smaller than the cross-sectional area of the third water channel 61c (area in the cross section perpendicular to the direction D2). The direction D2 is a direction in which water flows from the third water channel 61c to the second water channel 61b, that is, a direction in which water flows from the orifice portion 91 to the pressure chamber 92. For example, the orifice portion 91 includes a portion having the smallest cross-sectional area (diameter) in the second water channel 61b. Thereby, the orifice part 91 restrict | limits the flow volume (maximum flow volume) of the water which flows through the 2nd water channel 61b. That is, the orifice part 91 restrict | limits the flow volume of the water which flows through the 2nd water channel 61b so that it may not become larger than a predetermined value. The minimum cross-sectional area of the orifice portion 91 is smaller than the minimum cross-sectional area of the first water channel 61a.

  When the third water channel 61c branches into the first water channel 61a and the second water channel 61b in the nozzle head 475, the length of the first water channel 61a and the first water channel 61a are compared with the case where the branch is upstream of the nozzle head 475. The length of the two water channels 61b is shortened. For this reason, the difference between the amount of water flowing into the water reservoir chamber 93 from the first water channel 61a and the amount of water flowing into the water reservoir chamber 93 from the second water channel 61b becomes small, and there is a possibility that a pulsating flow cannot be generated.

On the other hand, in the embodiment, by restricting the flow rate of the second water channel 61b by the orifice portion 91, the flow rate of water flowing into the water reservoir chamber 93 from the first water channel 61a and the water reservoir chamber 93 from the second water channel 61b. The balance of the flow rate of water flowing into the water can be adjusted. Thereby, the water discharged from the buttocks washing spout 31a can be made into a pulsating flow.
Further, in the orifice portion 91, the nozzle head 475 can be removed even if the scale is clogged because the diameter of the second water passage 61b is narrow, so that maintenance is easy.

  The pressure chamber 92 is provided on the downstream side of the orifice portion 91. The pressure chamber 92 is a portion where the flow path becomes wider than the orifice portion 91. That is, the cross-sectional area of the pressure chamber 92 (the area in the cross section perpendicular to the direction D2) is larger than the cross-sectional area of the orifice portion 91. For example, the pressure chamber 92 includes a portion having the largest cross-sectional area (diameter) in the second water channel 61b. Further, an inner wall 92w of the pressure chamber 92 is provided on the direction D2 side shown in FIG. Thereby, the pressure chamber 92 can decelerate the water flowing through the second water channel 61b. For example, a part of the water that flows into the pressure chamber 92 from the orifice portion 91 does not travel straight, but swirls within the pressure chamber 92.

  The period of pulsation in the pulsating flow depends on the speed of water flowing into the water reservoir chamber 93 from the second water channel 61b. When the flow rate of the water flowing through the second water channel 61b is limited by the orifice unit 91, the flow rate of the water flowing through the second water channel 61b is increased because the diameter of the orifice unit 91 is relatively small. Therefore, the flow rate of the water flowing into the water reservoir chamber 93 from the second water channel 61b is also increased, and the pulsation cycle in the pulsating flow may be shortened.

  In contrast, in the embodiment, by providing the pressure chamber 92 in the second water channel 61b, the water flowing into the water reservoir chamber 93 from the second water channel can be decelerated. Thereby, the period of the pulsating flow discharged from the buttocks cleaning water discharge port 31a can be optimally adjusted.

  Further, since the orifice portion 91 is located at the inlet of the second water channel 61b, the pressure chamber 92 can be enlarged, and the velocity of water flowing into the water reservoir chamber 93 from the second water channel 61b can be surely lowered. Can do. Thereby, the pulsating flow of the optimal period can be produced | generated more reliably.

  The conduit 97 is provided on the downstream side of the pressure chamber 92. The conduit 97 is a portion where the flow path becomes narrower than the pressure chamber 92. That is, the cross-sectional area of the conduit 97 (area in the cross section perpendicular to the direction D4) is smaller than the cross-sectional area of the pressure chamber 92 (area in the cross section perpendicular to the direction D4). The direction D4 is a direction in which water flows from the pressure chamber 92 into the pipeline 97.

  Moreover, the pipe line 97 is located in the exit of the 2nd water channel 61b. That is, the pipe line 97 is a portion provided adjacent to the water reservoir chamber 93. Further, the conduit 97 is narrower than the water reservoir chamber 93. That is, the cross-sectional area of the pipe 97 (area in the cross section perpendicular to the direction D3) is smaller than the cross-sectional area of the water reservoir chamber 93 (area in the cross section perpendicular to the direction D3). The direction D3 is a direction in which water flows into the water reservoir chamber 93 from the second water channel 61b.

  The pipe line 97 has a bent shape. For this reason, the direction D3 is opposite to the direction D2. For example, the direction D2 faces upward, and the direction D3 faces downward. That is, the direction in which water flows in the second water channel 61b is reversed. Due to the pressure loss when the water flow is reversed, the speed of the water flowing into the water reservoir chamber 93 from the second water channel 61b can be reliably reduced. Thereby, the pulsating flow of the optimal period can be produced | generated more reliably. Note that the two directions being reversed is not limited to the two directions being completely antiparallel. In the range where the two directions are opposite, the angle between the two directions is 120 ° to 180 °.

FIG. 7A and FIG. 7B are schematic views illustrating the flow path switching unit of the sanitary washing device according to the embodiment.
The flow path switching unit 472 includes a fixed disk (stator) 80, a movable disk (rotor) 82, a housing 84, and a drive mechanism 86.

  The fixed disk 80 has, for example, a disk shape, and includes a front surface 80a (a surface facing the upstream side) and a back surface 80b opposite to the front surface 80a (a surface facing the downstream side).

  FIG. 7B is a plan view illustrating a fixed disk. The fixed disk 80 has a plurality of ports (openings). For example, the fixed disk 80 is provided with a buttocks washing port P1, a soft washing port P2, a bidet washing port P3, and a mist port P4.

  The buttocks cleaning port P1 is connected to the buttocks cleaning channel 51. The soft cleaning port P2 is connected to the soft cleaning channel 52. The bidet cleaning port P <b> 3 is connected to the bidet cleaning channel 53. The mist port P4 is connected to the spray channel 54.

  The movable disk 82 has, for example, a disk shape having a diameter similar to that of the fixed disk 80. The movable disk 82 is provided on the upstream side of the fixed disk 80. The movable disk 82 contacts the front surface 80 a of the fixed disk 80. The movable disk 82 slides and rotates on the front surface 80a about a direction orthogonal to the front surface 80a as an axis (hereinafter referred to as a rotation axis RA). The movable disk 82 has an opening corresponding to one port of the fixed disk 80. For example, when the opening of the movable disk 82 overlaps with one port of the fixed disk 80, another port of the fixed disk 80 is blocked by the movable disk 82. Thereby, water can be passed through only one port that overlaps the opening of the movable disk 82.

  The flow path switching unit 472 selectively switches the port through which water can pass by rotating the movable disk 82. Thereby, according to the port to select, water can be selectively supplied to at least one of the buttocks washing channel 51, the soft washing channel 52, the bidet washing channel 53, and the spray channel 54. .

  The housing 84 has, for example, a cylindrical shape, and houses the fixed disk 80 and the movable disk 82 in an internal space. The housing 84 supports the movable disk 82 rotatably. An internal space on the upstream side of the movable disk 82 of the housing 84 is connected to the water supply path 20 via a pipe or the like. The water supplied through the water supply path 20 is supplied from the internal space of the housing 84 to each flow path through the movable disk 82 and the fixed disk 80.

  The drive mechanism 86 includes an electric motor such as a motor or a solenoid, and rotates the movable disk 82 by supplying a driving force to the movable disk 82. The drive mechanism 86 is connected to the control unit 405 (control circuit), and rotates the movable disk 82 based on the control of the control unit 405. The control unit 405 switches the destination of water by driving the drive mechanism 86 to rotate the movable disk 82 and selecting one of the ports of the fixed disk 80. The drive mechanism 86 may be any mechanism that can rotate the movable disk 82 without causing water leakage.

  In the flow path switching unit having such a fixed disk and a movable disk, if the flow path is branched, the structure of the flow path switching unit becomes complicated or the diameter of the flow path becomes small. For example, the number of fixed disk ports and the number of flow paths connected to each port increase, resulting in a complicated structure. Further, for example, the diameter (cross-sectional area) of the port is reduced, and the scale is easily clogged.

  On the other hand, in the embodiment, as described above, the first flow paths 61 merge after branching in the nozzle head 475, and the nozzle head 475 is detachable from the nozzle body 474. Thereby, increase of the space which arrange | positions a flow path can be suppressed, and maintainability can be improved.

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, installation form, and the like of each element included in the sanitary washing device are not limited to those illustrated, but can be changed as appropriate.
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 water supply channel, 31 water discharge port, 31 a butt washing water discharge port, 31 b soft washing water discharge port, 31 c bidet washing water discharge port, 33 spray water discharge port, 51 butt washing flow channel, 52 soft washing channel, 53 bidet washing Channel, 54 spray channel, 61-64 first to fourth channel, 61a first water channel, 61b second water channel, 61c third water channel, 80 fixed disk, 80a front surface, 80b back surface, 82 movable disk, 84 housing 86 driving mechanism, 91 orifice part, 92 pressure chamber, 92w inner wall, 93 water reservoir, 94 water discharge line, 95 air line, 96 water flow path part, 97 pipe line, 100 sanitary washing device, 103 water discharge line, 200 toilet seat, 300 toilet lid, 400 casing, 405 control unit, 472 flow path switching unit, 473 nozzle, 474 nozzle body, 475 nozzle head, 800 toilet bowl, 801 bowl

Claims (5)

A nozzle body;
A nozzle head that is detachable from the nozzle body and has a water outlet for discharging water, and a flow path for supplying water to the water outlet;
A nozzle having
A flow path switching valve provided on the upstream side of the nozzle, for switching between water flow and water stop of the flow path;
With
The flow path of the nozzle head is
The first waterway,
A second waterway that merges with the first waterway;
A third waterway that branches into the first waterway and the second waterway;
A sanitary washing device characterized by comprising: The flow path of the nozzle has a water reservoir chamber,
The second water channel has an orifice part that restricts a flow rate of water flowing through the second water channel,
2. The sanitary washing device according to claim 1, wherein water discharged from the water outlet pulsates by joining water flowing through the first water channel and water flowing through the second water channel in the water reservoir chamber. . The second water channel has a pressure chamber provided on the downstream side of the orifice part,
The sanitary washing device according to claim 2, wherein the pressure chamber decelerates water flowing through the second water channel.   The sanitary washing apparatus according to claim 3, wherein the orifice part is located at an inlet of the second water channel.   5. The direction in which the water flowing into the water reservoir chamber flows from the second water channel is opposite to the direction in which the water flowing into the second water channel flows from the third water channel. The sanitary washing apparatus as described in one.

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