JP2019027025A - Sanitary washing device - Google Patents

Abstract

To inhibit acid solution from adhering to a member disposed around a tank for storing the acid solution.SOLUTION: A sanitary washing device according to an embodiment comprises a nozzle, supply channel, backflow prevention mechanism, and solution input unit. The backflow prevention mechanism comprises: a tank provided on the supply channel; a water inlet port that communicates with the upstream side supply channel of the supply channel and makes water flow into the inside of the tank; an outflow port that communicates with the downstream side supply channel of the supply channel and makes water inside the tank flow out to the downstream side supply channel; and an overflow port provided so as to form an air gap between the overflow port and the water inlet port. The solution input unit comprises: an input port into which acid solution is input by a user; a liquid supply channel for circulating the acid solution input from the input port; and a liquid inlet port for making the acid solution flowing in the liquid supply channel flow into the tank. The liquid supply channel of the solution input unit includes an enlarged part whose channel cross-sectional area increases as it is closer to the liquid inlet port.SELECTED DRAWING: Figure 8

Description

  The disclosed embodiments relate to a sanitary washing device.

  2. Description of the Related Art Conventionally, a sanitary washing device is known that is disposed on an upper part of a Western-style toilet body and cleans a human body with discharged water.

  When using a sanitary washing device in an area where hard water (water having a hardness of 120 mg / L or more) is used, minerals such as calcium are deposited and deposited in the water supply channel in the sanitary washing device, thereby blocking the water supply channel. There is a fear. Therefore, the deposit (scale) deposited on the water supply channel is removed by filling the water supply channel with an acidic solution such as citric acid.

  For example, Patent Literature 1 discloses a sanitary washing device that includes a dedicated tank for storing an acidic solution and supplies the acidic solution stored in the tank to a water supply channel.

JP 07-324365 A

  However, the above-described prior art has room for further improvement in terms of suppressing the adhesion of the acidic solution to the peripheral members arranged around the tank.

  For example, a sanitary washing device may be provided with a backflow prevention mechanism having a tank that forms a so-called air gap in the water supply channel in order to prevent the backflow of sewage to the water pipe. It is conceivable to add an acidic solution to the tank. However, since the tank of the backflow prevention mechanism has a very small capacity compared to, for example, a hot water storage tank provided in a hot water storage type sanitary washing device, the acidic solution is likely to splash when the acidic solution is introduced, and There is a possibility that the solution may scatter to the outside of the tank and adhere to the peripheral members. If the acidic solution adheres to the peripheral member, the peripheral member may be deteriorated. Therefore, it is desirable to prevent the acidic solution from splashing.

  An object of one embodiment is to provide a sanitary washing device that can suppress adhesion of an acidic solution to members arranged around a tank that stores the acidic solution.

  A sanitary washing device according to an aspect of an embodiment includes a nozzle that discharges water toward a local area of a user, a water supply channel that supplies water to the nozzle, a tank that is provided in the water supply channel, and the water supply channel A water inlet that is upstream of the tank and communicates with a water inlet that allows water to flow into the tank, and a downstream water channel that is downstream of the tank. And an overflow port that is provided so as to form an air gap between the water outlet and the outflow port for allowing the water inside the tank to flow out to the downstream water supply channel, and discharges excess water inside the tank. A backflow prevention mechanism comprising: an inlet into which an acidic solution is introduced by a user; a liquid supply path through which the acidic solution introduced from the inlet is circulated; and an acidic solution flowing through the liquid supply path to the tank Inflow A solution supplying portion and a mouth, the liquid supply passage of the solution turned part, the flow path cross-sectional area toward the entering-liquid inlet is characterized in that it comprises an expansion unit to expand.

  The relationship between the flow rate (Q), the flow velocity (V), and the channel cross-sectional area (A) is expressed by Q = V · A. When the flow rate (Q) is constant, the channel cross-sectional area (A) As the value increases, the flow velocity (V) decreases. Therefore, by increasing the channel cross-sectional area of the liquid supply path toward the liquid inlet, the flow rate of the acidic solution flowing through the liquid supply path is reduced compared to the case where the channel cross-sectional area of the liquid supply path is constant. It can be reduced. As a result, the flow rate of the acidic solution flowing out from the inlet is reduced, and the impact at the time of landing is reduced, so that the liquid splash when the acidic solution falls to the liquid level in the tank is suppressed, and the acidic solution The adhesion of the acidic solution to the peripheral member due to the liquid splash is suppressed.

  The liquid supply path includes a first extending portion that communicates with the charging port and extends in the vertical direction, and a second extending portion that communicates with the liquid inlet and extends in the horizontal direction. The enlarged portion is provided in the second extending portion.

  Compared to the case where the enlarged portion is provided in the first extending portion extending in the vertical direction by providing the enlarged portion in the second extending portion extending in the horizontal direction in the liquid supply passage. The flow rate of the acidic solution flowing through can be efficiently reduced.

  The flow path width in the second extending portion is characterized in that the flow path width in the horizontal direction is larger than the flow path width in the vertical direction.

  By making the shape of the 2nd extension part extended in a horizontal direction flat shape, the height dimension of a solution injection | throwing-in part can be restrained low. Thereby, the increase in the height dimension of the sanitary washing device can be suppressed.

  Further, the liquid supply path is characterized in that, in the enlargement portion, both the vertical flow path width and the horizontal flow path width expand toward the liquid inlet.

  By enlarging not only the vertical flow path width but also the horizontal flow path width, the height dimension of the solution charging section can be kept lower than when only the vertical flow path width is expanded.

  In addition, the solution charging portion includes a funnel portion whose opening area increases from the downstream side to the charging port from the charging port.

  Thereby, for example, even when a large amount of acidic solution is charged by a user in a short time, an acidic solution that cannot be completely discharged from the solution charging portion can be temporarily stored in the funnel portion. Therefore, the acidic solution can be prevented from overflowing from the solution charging portion. In addition, by increasing the opening area of the charging port, it is possible to facilitate the charging of the acidic solution by the user.

  Further, the funnel part is detachable. By making the funnel part detachable, it is possible to suppress an increase in the size of the solution charging part.

  Further, the solution charging unit drops the acidic solution at a position farther from the overflow port than a position at which water flowing out from the water inlet falls into the tank.

  By dropping the acidic solution as far as possible from the overflow port, the acidic solution supplied to the tank is discharged from the overflow port to the outside of the tank compared to when the acidic solution is dropped near the overflow port. It can be made difficult. As a result, for example, when water remains in the tank, even if an amount of acidic solution exceeding the capacity of the tank is introduced, water is discharged from the overflow port before the acidic solution. In addition, useless consumption of the acidic solution can be suppressed. Moreover, it becomes difficult to discharge | emit acidic solution from an overflow port, and adhesion to the peripheral member of the acidic solution which overflowed from the overflow port can also be suppressed.

  In addition, the solution charging unit drops the acidic solution at a position farther from the outlet than the position at which the water flowing out from the inlet drops into the tank.

  By dropping the acidic solution as far as possible from the outlet, the scale removal efficiency when water remains in the tank is lower than when the acidic solution is dropped near the outlet. The decrease can be suppressed (details will be described later).

  According to one aspect of the embodiment, it is possible to suppress the adhesion of the acidic solution to the members arranged around the tank that stores the acidic solution.

FIG. 1 is a perspective view schematically showing a toilet apparatus provided with a sanitary washing device according to the first embodiment. FIG. 2 is an explanatory diagram illustrating an example of the configuration of the sanitary washing device. FIG. 3 is a perspective view of the backflow prevention mechanism and the solution charging unit. FIG. 4 is a schematic cross-sectional view of the backflow prevention mechanism and the solution charging unit when viewed from the back side of the sanitary washing device. FIG. 5 is a perspective view of the main body of the solution charging unit. FIG. 6 is a view of the main body portion of the solution charging portion as viewed from the direction of the arrow A. 7 is a cross-sectional view taken along line BB in FIG. FIG. 8 is a plan view of the backflow prevention mechanism and the solution charging unit. 9 is a cross-sectional view taken along line CC in FIG. FIG. 10 is a flowchart showing a processing procedure in the scale removal mode. FIG. 11 is a flowchart illustrating the processing procedure of the scale removal processing. FIG. 12 is a flowchart showing the processing procedure of the drainage process. FIG. 13 is a timing chart showing an operation example of the sanitary washing device in the scale removal mode. FIG. 14 is a perspective view of the main body of the solution charging unit according to the second embodiment. FIG. 15 is a bottom view of the main body of the solution charging unit according to the second embodiment. FIG. 16 is a perspective view of the main body with the cover body removed.

  Hereinafter, embodiments of a sanitary washing device disclosed in the present application will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by embodiment shown below.

(First embodiment)
<1. Configuration of sanitary washing device>
FIG. 1 is a perspective view schematically showing a toilet apparatus provided with a sanitary washing device according to the first embodiment. In FIG. 1, for easy understanding, a three-dimensional orthogonal coordinate system in which the X-axis direction, the Y-axis direction, and the Z-axis direction that are orthogonal to each other are defined and the Z-axis positive direction is the vertical upward direction is shown. It is shown.

  As shown in FIG. 1, a toilet device 1 includes a Western-style toilet (hereinafter referred to as “toilet”) 10 and a sanitary washing device 20 and is installed in a toilet room. The toilet bowl 10 is a low tank type that performs washing with water stored in the water storage tank 11, but is not limited thereto, and may be a flush valve type, for example. In the example shown in FIG. 1, the floor-standing toilet 10 is shown, but the toilet bowl 10 is not limited to this, and may be a wall-mounted type.

  The sanitary washing device 20 is provided in the upper part of the toilet bowl 10. The sanitary washing device 20 includes a main body 30, a toilet lid 300, and a toilet seat (not shown). Both the toilet lid 300 and the toilet seat are attached to the main body 30 so that they can be opened and closed.

  The main body 30 includes a case 31 and a nozzle 40. The case 31 houses the nozzle 40 and the like.

  FIG. 2 is an explanatory diagram showing an example of the configuration of the sanitary washing device 20 including the nozzle 40. As shown in FIG. 2, the nozzle 40 has a plurality of discharge ports 41 for discharging water to a user's local area or the like. Here, although the example of the nozzle 40 provided with the three discharge outlets 41 is shown, the number of the discharge outlets 41 with which the nozzle 40 is provided may be one or two, and may be four or more. In the present specification, the expression “water” is not necessarily a meaning of cold water but may be used to mean including hot water.

  The nozzle 40 is configured to be able to advance and retract relative to the case 31 (see FIG. 1). Specifically, for example, the nozzle 40 is connected to a drive source such as a motor (not shown). The nozzle 40 is advanced and retracted between a position where the nozzle 40 has advanced into the bowl of the toilet bowl 10 and a position where the nozzle 40 is retracted and stored in the case 31 by driving the drive source. The nozzle 40 discharges water to the user's body at the advanced position to clean the local area.

  The sanitary washing device 20 further includes a water supply channel 50, an instantaneous heat exchanger (hereinafter simply referred to as “heat exchanger”) 70, a backflow prevention mechanism 90, a control unit 200, and an operation unit 220. . The nozzle 40, the water supply channel 50, the heat exchanger 70, the backflow prevention mechanism 90, and the control unit 200 are disposed in the case 31.

  The water supply channel 50 supplies water from the water pipe A, which is a water supply source, to the nozzle 40. Specifically, the water supply channel 50 includes an upstream water supply channel 51 and a downstream water supply channel 52. The upstream water supply path 51 is a flow path from the water pipe A to the backflow prevention mechanism 90, and the downstream water supply path 52 is a flow path from the backflow prevention mechanism 90 to the nozzle 40.

  In the middle of the upstream water supply channel 51, a strainer 61, an electromagnetic valve 62, and a constant flow valve 63 are provided in this order from the upstream side (that is, the water pipe A side).

  The strainer 61 removes foreign matters such as dust mixed in the water supplied from the water pipe A. The electromagnetic valve 62 is a normally-closed valve that is closed when not energized, and opens and closes the upstream water supply passage 51 in accordance with a control signal from the control unit 200. The constant flow valve 63 adjusts the water that has flowed in from the water pipe A to a predetermined flow rate or less and flows it out.

  A pump 64, a heat exchanger 70, a strainer 65, a vacuum breaker 66, and a switching valve 67 are provided in the middle of the downstream water supply path 52 in order from the upstream side (that is, the backflow prevention mechanism 90 side).

  The pump 64 is driven according to a control signal from the control unit 200 and supplies water stored in the tank 91 of the backflow prevention mechanism 90 to the nozzle 40.

  The heat exchanger 70 includes a heating element 71 such as a heater, and heats water flowing through the downstream water supply channel 52 to a set temperature while maintaining the flow rate.

  The strainer 65 filters water flowing through the downstream water supply channel 52. For example, the strainer 65 removes foreign matters such as scales contained in water flowing through the downstream water supply channel 52.

  The vacuum breaker 66 prevents the backflow from the nozzle 40 to the heat exchanger 70 or the like by causing the water that flows backward to flow to the atmosphere release path 661 when, for example, a negative pressure is generated in the downstream water supply passage 52.

  The switching valve 67 is driven in accordance with a control signal from the control unit 200, and switches the outflow destination of the water flowing through the downstream water supply channel 52. For example, the water flowing through the downstream water supply passage 52 is switched to one of a plurality of discharge ports 41 provided in the nozzle 40 by the switching valve 67. In addition, an electrolytic cell unit 68 that generates functional water is connected to the switching valve 67, and water flowing through the downstream water supply passage 52 is switched to the electrolytic cell unit 68 by the switching valve 67.

  The electrolytic cell unit 68 has an anode plate and a cathode plate therein, and functions in accordance with water containing hypochlorous acid by electrolyzing water flowing inside by driving according to a control signal from the control unit 200. Produced as water. The electrolytic cell unit 68 causes the generated functional water to flow out to the spray nozzle 681 or the alkaline water discharge path 682. Inside the electrolytic cell unit 68, there is provided a switching valve that switches the functional water outflow destination between the spray nozzle 681 and the alkaline water discharge path 682.

  The electrolytic cell unit 68 does not necessarily include both the spray nozzle 681 and the alkaline water discharge path 682, and may be configured to include only the spray nozzle 681, for example. In this case, a switching valve for switching the functional water outflow destination between the spray nozzle 681 and the alkaline water discharge path 682 is unnecessary.

  The backflow prevention mechanism 90 communicates with a tank 91 provided in the water supply channel 50, an upstream water supply channel 51, a water inlet 92 through which water flows into the tank 91, and a downstream water supply channel 52. 91 and an outflow port 93 through which water inside 91 flows out to the downstream water supply channel 52. The backflow prevention mechanism 90 is provided so as to form an air gap between the water inlet 92 and an overflow port 94 for discharging excess water inside the tank 91, and a float for detecting the water level inside the tank 91. A switch 95 (an example of a water level detection unit).

  The water that has passed through the constant flow valve 63 flows into the tank 91 from the water inlet 92. The inflowing water is stored inside the tank 91, but when the water level exceeds the full water level H1, it flows out from the overflow port 94 to the outside of the tank 91 (toilet bowl 10) as surplus water.

  The overflow port 94 is provided at a position lower than the water inlet 92. Therefore, a space (air gap) that is open to the atmosphere is formed between the water inlet 92 and the overflow port 94. Thereby, even if the water level of the tank 91 rises, the water stored in the tank 91 is discharged from the overflow port 94 to the outside of the tank 91 before reaching the water inlet 92. For this reason, the reverse flow of the sewage from the tank 91 to the upstream can be prevented.

  The float switch 95 is a switch that is disposed inside the tank 91 and is turned ON / OFF when the float moves up and down as the water level in the tank 91 fluctuates. Specifically, the float switch 95 outputs an ON signal to the control unit 200 when the water level inside the tank 91 is equal to or higher than a predetermined high water level. Further, the float switch 95 outputs an OFF signal to the control unit 200 when the water level inside the tank 91 is equal to or lower than a predetermined low water level. The “high water level” is a predetermined water level higher than half of the full water level H1, and the “low water level” is a predetermined water level lower than half of the full water level H1. In the present embodiment, the “high water level” is set to the full water level H1, and the “low water level” is the air level, that is, all water that can be discharged from the outlet 93 is discharged from the inside of the tank 91. It is assumed that the water level in the tank 91 in the state is set. However, not limited to this, the “high water level” may be set to a water level lower than the full water level H1, and the “low water level” may be set to a water level higher than the air level.

  The float switch 95 is not limited to the configuration described above. For example, the float switch 95 outputs a first switch that outputs an ON signal when the water level inside the tank 91 is higher than or equal to a high water level, and outputs an ON signal when the water level inside the tank 91 is lower than or equal to a low water level. The 2nd switch to be provided may be sufficient. In this case, the control unit 200 detects “high water level” when the ON signal is output from the first switch and the OFF signal is output from the second switch, and the ON signal is output from the second switch. When the OFF signal is output from the first switch, the “low water level” can be detected. Further, the control unit 200 can detect that neither the “high water level” nor the “low water level” is output when the OFF signal is output from both the first switch and the second switch.

  The operation unit 220 includes operation buttons, operation knobs, and the like that are input by the user to start and stop the cleaning of the human body, and are provided at appropriate positions in the toilet room. The operation unit 220 outputs a signal indicating a start instruction or the like input from the user via an operation button or the like. For example, a remote controller can be used as the operation unit 220, but the operation unit 220 is not limited thereto, and may be attached to the main body unit 30.

  Various signals output from the float switch 95 and the operation unit 220 are input to the control unit 200. The controller 200 controls the sanitary washing device 20 as a whole, and includes, for example, an arithmetic processing device (not shown) such as a CPU (Central Processing Unit) and a storage device (not shown) such as a RAM (Random Access Memory).

  The control unit 200 performs a process of controlling the electromagnetic valve 62, the heating element 71, the pump 64, the nozzle 40, the electrolytic cell unit 68, and the like based on various types of input signals.

  By the way, in regions using hard water such as Europe, minerals such as calcium may be deposited and deposited in the water supply channel 50, thereby causing the water supply channel 50 to be blocked. In addition, deposits (scales) may accumulate on the tank 91, the strainer 65, the vacuum breaker 66, the nozzle 40, the spray nozzle 681, and the like as well as the water supply channel 50, thereby blocking these.

  For this reason, the sanitary washing device 20 according to the present embodiment executes a scale removal process for removing the tank 91 and the scale deposited on the downstream side of the tank 91 using an acidic solution such as citric acid.

  In the scale removal process, the acidic solution stored in the tank 91 is supplied to the downstream water supply channel 52 to fill the downstream water supply channel 52 and the nozzle 40 with the acidic solution, and the downstream water supply channel 52 and the nozzle 40 and the like are filled. Dissolve the deposited scale with an acidic solution. Thereafter, by supplying water to the downstream side water supply channel 52 and the nozzle 40, the dissolved matter and acidic solution of the scale are discharged together with the water. As a result, the scale is removed from the downstream water supply passage 52, the nozzle 40, and the like.

  The scale removal process is executed in accordance with a shift instruction to the scale removal mode output from the operation unit 220 in response to a user operation on the operation unit 220.

  The sanitary washing device 20 includes a solution charging unit that supplies an acidic solution charged by a user to the tank 91.

  Here, when the acidic solution is charged into the tank 91, the acidic solution may splash, and the acidic solution may adhere to peripheral members disposed around the tank 91. In particular, the tank 91 of the backflow prevention mechanism 90 has a very small capacity compared to the hot water storage tank provided in the hot water storage type sanitary washing device, and when the liquid splash occurs, the splashed acidic solution is scattered outside the tank 91. Therefore, the acidic solution tends to adhere to the peripheral members. If the acidic solution adheres to the peripheral member, the peripheral member may be deteriorated. Therefore, it is desirable to prevent the acidic solution from splashing.

  Accordingly, in the sanitary washing device 20 according to the present embodiment, the shape of the solution charging unit is devised to suppress the splashing of the acidic solution and suppress the adhesion of the acidic solution to the peripheral members.

  Further, when the acidic solution is introduced into the tank 91 and an amount of acidic solution exceeding the full water level H1 of the tank 91 is introduced into the tank 91, the acidic solution overflows from the overflow port 94 of the tank 91 and adheres to the peripheral members. There is a risk. As described above, since the capacity of the tank 91 is small, for example, when the acidic solution is introduced into the tank 91 in a state where the water level in the tank 91 is close to the full water level H1, the acidic solution may easily overflow from the overflow port 94. There is.

  Therefore, in the sanitary washing device 20 according to the present embodiment, when an instruction to shift to the scale removal mode is received, the scale removal process is performed after the discharge process for discharging the water inside the tank 91 is performed. Therefore, the leakage of the acidic solution from the overflow port 94 is suppressed, and the adhesion of the acidic solution to the peripheral members is suppressed.

<2. Configuration of solution charging section>
Hereinafter, the configuration of the solution charging unit and the contents of the scale removal process will be specifically described with reference to FIG. First, the configuration of the solution charging unit will be described with reference to FIGS. FIG. 3 is a perspective view of the backflow prevention mechanism 90 and the solution charging unit. FIG. 4 is a schematic cross-sectional view of the backflow prevention mechanism 90 and the solution charging unit when viewed from the back side of the sanitary washing device 20.

  In this specification, terms such as “horizontal” and “vertical” do not necessarily require mathematically precise accuracy, but allow for substantial tolerances and errors.

  As shown in FIG. 3, the solution charging unit 100 includes a main body unit 101 and a funnel unit 102. As shown in FIG. 4, the main body 101 is provided inside the case 31 of the sanitary washing device 20, and the funnel 102 is provided outside the case 31. Specifically, a recess 311 is formed on the upper surface of the case 31, and the upstream opening 111 of the main body 101 is fixed to the bottom surface of the recess 311.

  In a normal state, a lid (not shown) is attached to the recess 311 of the case 31 so that foreign matters such as dust do not enter the upstream opening 111 of the main body 101. When the acidic solution is introduced into the tank 91, the lid (not shown) is removed and the funnel portion 102 is attached to the upstream opening 111 of the main body 101.

  The funnel portion 102 has an inlet 121 into which an acidic solution is introduced by a user. The funnel portion 102 has a so-called funnel shape in which the opening area increases from the downstream side to the charging port 121 with respect to the charging port 121.

  As described above, the solution charging unit 100 includes the funnel unit 102, so that even if a large amount of acidic solution is charged in a short time by the user, the funnel unit can remove the acidic solution that cannot flow through the main body unit 101. 102 can once be stored. For this reason, it can suppress that an acidic solution overflows from the solution injection part 100. FIG. Further, by widening the opening area of the charging port 121, it is possible to facilitate the charging of the acidic solution by the user.

  Further, in the solution charging unit 100 according to the present embodiment, the funnel unit 102 is detachable from the main body unit 101 (in other words, the case 31). For this reason, the charging of the acidic solution by the user can be facilitated while suppressing an increase in the size of the main body 30.

  The acidic solution introduced by the user from the inlet 121 of the funnel 102 flows into the main body 101 from the upstream opening 111 of the main body 101, and the downstream opening 112 (liquid inlet) of the main body 101. 1 example) flows out of the main body 101. An upper opening 911 is formed in the upper part of the tank 91, and the acidic solution flowing out from the downstream opening 112 of the main body 101 is supplied into the tank 91 through the upper opening 911.

  The solution charging unit 100 does not necessarily include the funnel 102, and the upstream opening 111 of the main body 101 may be an acidic solution charging port. The upstream side opening 111 as an input port may be formed in a funnel shape. By comprising in this way, the effect similar to the case where the funnel part 102 is provided can be acquired.

  FIG. 5 is a perspective view of the main body 101 of the solution charging unit 100, and FIG. 6 is a view of the main body 101 of the solution charging unit 100 as viewed from the arrow A. FIG. 7 is a sectional view taken along line BB in FIG.

  As shown in FIG. 5, the main body 101 of the solution charging unit 100 includes an upstream opening 111, a downstream opening 112, and a liquid supply path 113. The upstream opening 111 opens upward, and the downstream opening 112 opens in the horizontal direction. A notch 112 a is formed on the lower surface of the downstream opening 112, and the acidic solution that has flowed into the main body 101 from the upstream opening 111 enters the tank 91 from the notch 112 a of the downstream opening 112. Fall towards you.

  The liquid supply path 113 is formed inside the main body 101, communicates the upstream opening 111 and the downstream opening 112, and directs the acidic solution flowing from the upstream opening 111 toward the downstream opening 112. Circulate.

  As shown in FIGS. 6 and 7, the liquid supply path 113 includes a first extending portion 113a and a second extending portion 113b. The first extending portion 113a is a portion extending in the vertical direction, and communicates with the upstream opening 111 on the upstream side and communicates with the second extending portion 113b on the downstream side. The second extending portion 113b is a portion that extends in the horizontal direction while spreading from the upstream side toward the downstream side, communicates with the first extending portion 113a on the upstream side, and downstream opening portion 112 on the downstream side. Communicate with.

  As shown in FIG. 6, the flow path width in the horizontal direction of the second extending portion 113b increases from W1 to W2 (> W1) from the upstream end (back side of the drawing) toward the downstream opening 112. . Further, as shown in FIGS. 6 and 7, the flow path width in the vertical direction of the second extending portion 113b also increases from W3 to W4 (> W3) as it goes from the upstream end to the downstream opening 112. .

  As described above, the liquid supply path 113 of the solution supply unit 100 according to the present embodiment includes an enlarged part in which the flow path cross-sectional area increases toward the downstream opening 112.

  Compared with the case where the flow path cross-sectional area of the liquid supply path 113 is made constant by enlarging the flow path cross-sectional area of the liquid supply path 113 toward the downstream opening 112, the acidic solution flowing through the liquid supply path 113. The flow rate of the can be reduced. Thereby, the flow rate of the acidic solution flowing out from the downstream opening 112 is reduced, and the impact at the time of landing is reduced, thereby suppressing the liquid splash when the acidic solution falls on the liquid surface in the tank 91, The acidic solution adheres to the peripheral members due to the splashing of the acidic solution.

  Further, by providing an enlarged portion in the second extending portion 113b extending in the horizontal direction in the liquid supply path 113, the flow rate of the acidic solution flowing through the liquid supply path 113 can be efficiently reduced.

  Further, the second extending portion 113 b that is an enlarged portion is formed so that both the vertical channel width and the horizontal channel width increase toward the downstream opening 112. In this way, not only the vertical flow path width but also the horizontal flow path width is expanded, so that the height of the solution charging unit 100 is made lower than when only the vertical flow path width is expanded. Can be suppressed. Therefore, an increase in the height dimension of the sanitary washing device 20 can be suppressed.

  In addition, the second extending portion 113b of the solution charging unit 100 has a so-called flat shape in which the channel width in the horizontal direction is larger than the channel width in the vertical direction. By setting it as this shape, the height dimension of the solution injection part 100 can be suppressed further low, and the increase in the height dimension of the sanitary washing apparatus 20 can further be suppressed.

  In addition, the solution charging unit 100 drops the acidic solution toward the tank 91 from a notch 112 a formed on the lower surface of the downstream opening 112. Thereby, compared with the case where the notch part 112a is not provided in the downstream opening part 112, the quantity of the acidic solution which scatters out of the tank 91 from the downstream opening part 112 can be decreased. Therefore, the adhesion of the acidic solution to the peripheral member can be further suppressed.

  Further, as shown in FIG. 7, the flow path width W5 in the vertical direction of the second extension part 113b at the connection part with the first extension part 113a is smaller than the flow path width W0 of the first extension part 113a. It is formed. Thereby, the momentum of the acidic solution which flows out from the 1st extension part 113a to the 2nd extension part 113b can be weakened. Therefore, the adhesion of the acidic solution to the peripheral member can be further suppressed.

<3. Position of acidic solution from tank to tank>
Next, the charging position of the acidic solution from the solution charging unit 100 to the tank 91 will be described with reference to FIGS. 8 is a plan view of the backflow prevention mechanism 90 and the solution charging unit 100, and FIG. 9 is a cross-sectional view taken along the line CC in FIG.

  As shown in FIGS. 8 and 9, the solution charging unit 100 drops the acidic solution to the dropping position P2 that is farther from the overflow port 94 than the dropping position P1 at which the water flowing out from the water inlet 92 drops into the tank 91. Let

  Specifically, the water inlet 92 discharges the water supplied from the water pipe A (see FIG. 2) in the horizontal direction. The water discharged from the water inlet 92 collides with the facing surface 912 of the tank 91 facing the water inlet 92 with a certain interval, and then falls toward the inside of the tank 91.

  On the other hand, the solution charging unit 100 drops the acidic solution charged by the user from the notch 112a of the downstream opening 112 toward the inside of the tank 91. The drop position P2 is an overflow port than the drop position P1. The downstream opening 112 is positioned so as to be far from 94. In other words, in the plan view, the downstream opening 112 of the solution charging unit 100 is disposed at a position farther from the overflow port 94 than the facing surface 912 of the tank 91.

  In this way, by dropping the acidic solution as far as possible from the overflow port 94, the acidic solution supplied into the tank 91 can be reduced compared to the case where the acidic solution is dropped near the overflow port 94. It is possible to make it difficult to discharge the tank 91 from the overflow port 94. Thereby, for example, when water remains in the tank 91, even if an amount of the acidic solution exceeding the capacity of the tank 91 is introduced, the water is discharged from the overflow port 94 before the acidic solution. Therefore, useless consumption of the acidic solution can be suppressed. Further, since the acidic solution is not easily discharged from the overflow port 94, the acidic solution overflowing from the overflow port 94 can be prevented from adhering to the peripheral members.

  Further, as shown in FIGS. 8 and 9, the solution charging unit 100 drops the acidic solution to a position farther from the outlet 93 than the dropping position P <b> 1 where the water flowing out from the inlet 92 drops into the tank 91. That is, the downstream opening 112 is positioned so that the acidic solution fall position P2 is farther from the outlet 93 than the water fall position P1. In other words, in the plan view, the downstream opening 112 of the solution charging unit 100 is disposed at a position farther from the outlet 93 than the facing surface 912 of the tank 91.

  In this way, by causing the acidic solution to fall as far as possible from the outlet 93, water remains in the tank 91 as compared with the case where the acidic solution is dropped near the outlet 93. Decrease in scale removal efficiency in the case of being present can be suppressed.

  Specifically, in the scale removal process, when the acidic solution in the tank 91 is supplied to the downstream water supply channel 52, the nozzle 40, or the like, an excess acidic solution may be discharged from the nozzle 40 to the toilet 10. The acidic solution discharged from the nozzle 40 is an acidic solution that is sucked out of the tank 91 by the outlet 93 immediately after the start of the descaling process, that is, an acidic solution that exists near the outlet 93. If water remains in the tank 91 and the acidic solution is dropped near the outlet 93, the water remaining in the tank 91 is expelled to a position far from the outlet 93, and the outlet The acidic solution is in the vicinity of 93. As a result, there is a possibility that the acidic solution is sucked out of the outlet 93 before the water and is discharged from the nozzle 40 wastefully.

  On the other hand, when the acidic solution is dropped to a position far from the outlet 93, water is sucked from the outlet 93 and discharged from the nozzle 40 before the acidic solution. Can reduce wasteful consumption. In addition, an acidic solution having a high concentration (not lowered as much as possible from the desired concentration) that is not diluted with water remaining in the tank 91 can be supplied to the downstream water supply channel 52, the nozzle 40, and the like. Therefore, it is possible to suppress a decrease in scale removal efficiency when water remains in the tank 91.

  Further, by dropping the acidic solution to a position far from the outlet 93, the acidic solution can be spread over every corner of the tank 91. For this reason, the scale accumulated in the tank 91 can be efficiently removed.

  As shown in FIG. 9, the tank 91 includes a first storage unit 913 and a second storage unit 914 that communicates with the first storage unit 913 and is deeper than the first storage unit 913. 93, the overflow port 94, and the float switch 95 (not shown) are arranged in the second reservoir 914. Further, an upper opening 911 (see FIG. 3) is provided in the upper part of the first storage unit 913, and the solution charging unit 100 drops the acidic solution into the first storage unit 913.

  The outlet 93 is disposed at a position lower than the bottom surface of the first storage unit 913, specifically, near the bottom surface of the second storage unit 914. However, since a slight gap is provided between the outlet 93 and the bottom surface of the second reservoir 914, water or an acidic solution may remain at a position lower than the outlet 93. The water level in the tank 91 at this time is the empty water level H2, and the float switch 95 detects the full water level H1 and the empty water level H2 of the tank 91.

  Since the backflow prevention mechanism 90 is a horizontal backflow prevention mechanism, the sanitary washing device 20 can be downsized as compared with the case of a vertical backflow prevention mechanism that discharges water in the vertical direction. Moreover, since the backflow prevention mechanism 90 is formed integrally with the tank 91, the sanitary washing device 20 can be further reduced in size.

<4. About scale removal processing>
Next, a specific operation of the scale removal process will be described with reference to FIGS. FIG. 10 is a flowchart showing a processing procedure in the scale removal mode. FIG. 11 is a flowchart illustrating the processing procedure of the scale removal processing. 10 and 11 is executed by the control unit 200 controlling the pump 64, the switching valve 67, the nozzle 40, and the like included in the sanitary washing device 20.

  As shown in FIG. 10, the control unit 200 determines whether or not an instruction to shift to the scale removal mode has been received (step S101). Specifically, when the control unit 200 receives an instruction to shift to the scale removal mode output from the operation unit 220, the control unit 200 determines that the instruction to shift to the scale removal mode has been received.

  The control unit 200 repeats the determination process in step S101 until receiving an instruction to shift to the scale removal mode (No in step S101). On the other hand, if it is determined in step S101 that an instruction to shift to the scale removal mode has been received (step S101, Yes), the control unit 200 executes a drainage process prior to the scale removal process (step S102).

  The drainage process is a process for discharging water inside the tank 91. Specifically, the control unit 200 drives the pump 64 to discharge the water in the tank 91 from the nozzle 40. For example, the control unit 200 ends the drainage process when a predetermined time has elapsed since the drainage process was started. Alternatively, the control unit 200 ends the drainage process when the air level H2 is detected by the float switch 95.

  Thereafter, the control unit 200 starts a scale removal process (step S103). Specifically, as shown in FIG. 11, the control unit 200 determines whether or not the first charging of the acidic solution has been completed (step S201). Specifically, the control unit 200 determines that the first charging of the acidic solution has been completed when the charging completion notification output from the operation unit 220 is received. The charging completion notification is transmitted from the operation unit 220 to the control unit 200 by operating the operation unit 220 after the user has charged the acidic solution into the funnel unit 102 of the solution charging unit 100.

  The control unit 200 repeats the determination process in step S201 until receiving the completion notification (step S201, No). On the other hand, if it is determined in step S201 that the input completion notification has been received (step S201, Yes), the control unit 200 drives the pump 64 to suck out the acidic solution stored in the tank 91 from the tank 91. Then, the downstream side water supply passage 52 and the nozzle 40 are filled (step S202). The control unit 200 ends the process of step S202 when a predetermined time has elapsed after starting the driving of the pump 64 or when the air level H2 is detected by the float switch 95.

  In step S <b> 202, the control unit 200 drives the switching valve 67 to switch the flow destination of the acidic solution, whereby each flow path downstream of the switching valve 67, specifically, each discharge port 41 of the nozzle 40. The acidic solution is filled in the flow path to, the flow path to the spray nozzle 681, and the alkaline water discharge path 682. However, since the capacity of the tank 91 is small, the acidic solution can be distributed to all of the downstream water supply passage 52 and the nozzles 40 and the like only with the acidic solution charged into the tank 91 by a single charging operation to the tank 91. I can't. Therefore, in the sanitary washing device 20 according to the present embodiment, the acidic solution is distributed to all of the downstream water supply channel 52 and the nozzle 40 by performing the charging of the acidic solution into the tank 91 twice.

  Subsequently, the control unit 200 determines whether or not the second charging of the acidic solution is completed (step S203). Specifically, the control unit 200 determines that the second charging of the acidic solution has been completed when the charging completion notification output from the operation unit 220 is received again. The control unit 200 repeats the determination process in step S203 until receiving the completion notification (step S203, No).

  When it is determined in step S203 that the second completion notification has been received (step S203, Yes), the control unit 200 drives the pump 64 again, so that the acidic solution stored in the tank 91 is stored in the tank 91. The water is sucked out from the water and filled into the downstream water supply passage 52, the nozzle 40, etc. (step S204). As a result, the acidic solution is filled in all of the downstream water supply passage 52 and the nozzle 40. The control unit 200 ends the process of step S204 when a predetermined time has elapsed after starting the driving of the pump 64 or when the air level H2 is detected by the float switch 95.

  As described above, the control unit 200 stores in the tank 91 by performing the operation of supplying all the acidic solutions that can be discharged from the outlet 93 to the downstream side water supply channel 52 and the nozzle 40 in the scale removal process a plurality of times. The downstream acidic water solution 52 and the nozzle 40 were filled with the acidic solution. Thereby, even if it is a case where the capacity | capacitance of the tank 91 is small, all of the downstream side water supply path 52, the nozzle 40, etc. can be filled up with an acidic solution.

  Here, the acidic solution filling process is performed twice. However, the number of times of the filling process is such that the capacity of the tank 91, the amount of the acidic solution necessary to fill the downstream water supply channel 52, the nozzle 40, and the like. And is not limited to twice.

  Subsequently, the control unit 200 waits for a predetermined time in a state where all of the downstream water supply channel 52 and the nozzle 40 are filled with the acidic solution (step S205). Thereby, the scale deposited in the downstream side water supply channel 52 and the nozzle 40 is dissolved by the acidic solution. Further, the scale accumulated in the tank 91 is also dissolved by the acidic solution.

  Thereafter, the control unit 200 drives the pump 64 again to discharge the acidic solution in the tank 91 from the nozzle 40 (step S206). Further, the controller 200 drives the electromagnetic valve 62 in a state where the pump 64 is driven, thereby supplying water to the inside of the tank 91, and supplying water in the tank 91 to the nozzle 40, the spray nozzle 681 and the alkalinity. A process of discharging from the water discharge path 682 is performed. As a result, the acidic solution remaining in the tank 91, the downstream water supply channel 52, the nozzle 40, and the like is replaced with water. When the process of step S206 is completed, the control unit 200 ends the scale removal process and ends the scale removal mode.

  As described above, in the sanitary washing device 20 according to the present embodiment, when the instruction to shift to the scale removal mode is received, the drainage process for discharging the water inside the tank 91 is performed before the scale removal process is performed. It was.

  The user can know the appropriate amount of the acidic solution to be put into the tank 91 by reading, for example, a manual or browsing information displayed on the operation unit 220. However, the user cannot know the amount of water stored in the tank 91. For this reason, even if an appropriate amount of acidic solution is put into the tank 91 by the user, the acidic solution may overflow from the overflow port 94 depending on the amount of water stored in the tank 91. .

  In contrast, in the sanitary washing device 20 according to the present embodiment, when an instruction to shift to the scale removal mode is received, the drainage treatment is performed and the water inside the tank 91 is discharged, so that the acidic solution overflow port is discharged. Leakage from 94 can be suppressed. Therefore, according to the sanitary washing device 20 according to the present embodiment, it is possible to suppress the acidic solution from adhering to the peripheral members arranged around the tank 91.

  Further, the control unit 200 discharges all the water that can be discharged from the outlet 93 from the inside of the tank 91 by performing the waste water treatment. In other words, the control unit 200 sets the water level in the tank 91 to the air level H2 by performing the waste water treatment. As a result, more acidic solution can be stored in the tank 91. Further, it is possible to prevent the acidic solution from being diluted with water remaining in the tank 91.

  Here, in the waste water treatment, the water level in the tank 91 is set to the air water level H2, but the water level after the waste water treatment does not necessarily need to be the air water level H2. For example, the control unit 200 may set the water level inside the tank 91 to a predetermined water level that is higher than the empty water level H2 and lower than the full water level H1 by performing wastewater treatment. This also makes it possible to suppress leakage of the acidic solution from the overflow port 94 and dilution of the acidic solution with the remaining water as compared with the case where the wastewater treatment is not performed. Further, for example, by leaving a predetermined amount of water in the tank 91 and allowing the user to input the stock solution of the acidic solution, the tank 91 is acidic without bothering the user. It is also possible to dilute the solution to the desired concentration.

  By the way, when the amount of the acidic solution thrown in by the user exceeds an appropriate amount, the acidic solution may overflow from the overflow port 94 even if the drainage treatment is performed before the scale removal treatment. Therefore, in the sanitary washing device 20, a drainage process is performed to more reliably prevent the acidic solution from overflowing from the overflow port 94.

  The contents of the drainage process will be described with reference to FIG. FIG. 12 is a flowchart showing the processing procedure of the drainage process.

  In addition, there is a possibility that the acidic solution is mistakenly added other than in the scale removal mode. Therefore, the drainage process is executed regardless of whether or not the scale removal mode is in effect.

  As shown in FIG. 12, the control unit 200 determines whether or not the full water level H1 is detected by the float switch 95 (step S301). The control part 200 repeats the process of step S301 until the full water level H1 is detected (step S301, No).

  If it determines with the full water level H1 having been detected in step S301 (step S301, Yes), the control part 200 will drive the pump 64 (step S302), and will discharge the acidic solution (or water) in the tank 91 from the nozzle 40. Discharge.

  Subsequently, the control unit 200 determines whether or not the full water level H1 has been eliminated, that is, whether or not the full water level H1 is no longer detected by the float switch 95 (step S303).

  If it is determined in step S303 that the full water level H1 has been eliminated (step S303, Yes), the control unit 200 stops the pump 64 (step S304) and ends the drainage process.

  On the other hand, when the full water level H1 is not eliminated in step S303 (step S303, No), the control unit 200 determines whether or not the driving time of the pump 64 exceeds the threshold value (step S305). (No at step S305), the process returns to step S303.

  When it determines with the drive time of the pump 64 having exceeded the threshold value in step S305 (step S305, Yes), the control part 200 starts the scale removal process mentioned above (step S103), and complete | finishes a drainage process.

  As described above, the control unit 200 executes the drainage process of discharging the acidic solution inside the tank 91 when the full water level H1 is detected by the float switch 95. Therefore, it is possible to more reliably prevent the acidic solution from overflowing from the overflow port 94.

  Here, the drainage process is executed when the full water level H1 is detected. However, the drainage process is performed at least when the water level in the tank 91 is higher than the half water level of the full water level H1. It may be executed when the float level is detected by the float switch 95.

  Whether or not the control unit 200 has received an instruction to shift to the scale removal mode when the driving time of the pump 64 exceeds the threshold value in the drainage process, that is, when the full water level H1 continues for a certain period of time. Regardless of the scale, the descaling process was executed. Thereby, it can suppress that an acidic solution is discharged | emitted wastefully.

  Note that when the drainage process is executed, the controller 200 may always execute the scale removal process regardless of the drive time of the pump 64. As a result, it is possible to prevent the acidic solution from remaining in the tank 91 or the downstream water supply channel 52.

  Next, an operation example of the sanitary washing device 20 in the scale removal mode will be described with reference to FIG. FIG. 13 is a timing chart showing an operation example of the sanitary washing device 20 in the scale removal mode.

  In FIG. 13, the open / close state of the electromagnetic valve 62, the water level of the tank 91, and the drive state of the pump 64 are shown in order from the top. Before the transition to the scale removal mode, the solenoid valve 62 is closed and the pump 64 is OFF. Further, it is assumed that a predetermined amount of water is stored inside the tank 91.

  As shown in FIG. 13, when shifting to the scale removal mode, first, the pump 64 is driven (T1), and the water in the tank 91 is discharged (drainage treatment). Thereafter, when the water level in the tank 91 becomes the air level H2, the pump 64 stops (T2).

  Subsequently, the acid solution is introduced into the tank 91 by the user, and the water level in the tank 91 rises. At this time, when the water level in the tank 91 exceeds the full water level H1 (T3), the pump 64 is driven, and an excess acidic solution is discharged from the tank 91 (drainage treatment). Thereafter, when the water level in the tank 91 falls below the full water level H1, the pump 64 stops (T4).

  Subsequently, when the user transmits an input completion notification using the operation unit 220, the pump 64 is driven (T5), and the acidic solution inside the tank 91 is filled into the downstream water supply channel 52, the nozzle 40, and the like. The When the water level inside the tank 91 becomes the air level H2, the pump 64 stops (T6).

  Subsequently, the acidic solution is again introduced into the tank 91 by the user, and the water level in the tank 91 rises. Thereafter, when the user transmits an input completion notification using the operation unit 220, the pump 64 is driven (T7), and the acidic solution inside the tank 91 is filled in the downstream water supply channel 52, the nozzle 40, and the like. .

  Subsequently, when the water level inside the tank 91 becomes, for example, half the water level H1 (T8), the pump 64 is temporarily stopped. Then, after waiting for a certain time, the pump 64 is driven again (T9), and the acidic solution in the tank 91 is filled again into the downstream water supply passage 52, the nozzle 40, and the like. Thereafter, when the water level in the tank 91 becomes the air level H2, the pump 64 stops (T10).

  Subsequently, after waiting for a certain time (T11), when the electromagnetic valve 62 is opened, water is supplied into the tank 91, and when the pump 64 is driven, the water supplied into the tank 91 is discharged. It is discharged to the toilet 10 through the downstream water supply channel 52 and the nozzle 40. As a result, the acidic solution remaining in the downstream water supply channel 52 and the nozzle 40 is discharged.

  Thereafter, after a lapse of a certain time (T12), the solenoid valve 62 is closed, the pump 64 is stopped, and the scale removal mode is ended.

  As described above, the sanitary washing device 20 according to this embodiment includes the nozzle 40, the water supply channel 50, the backflow prevention mechanism 90, and the solution charging unit 100. The nozzle 40 discharges water toward the user's local area. The water supply channel 50 supplies water to the nozzle 40. The backflow prevention mechanism 90 communicates with a tank 91 provided in the water supply channel 50 and an upstream water supply channel 51 located upstream of the tank 91 in the water supply channel 50, and a water inlet that allows water to flow into the tank 91. 92, an outlet 93 that communicates with the downstream water supply passage 52 located downstream of the tank 91 in the water supply passage 50, and discharges the water inside the tank 91 to the downstream water supply passage 52, and the water inlet 92. An overflow port 94 is provided so as to form an air gap therebetween, and discharges excess water inside the tank 91. The solution charging unit 100 includes a charging port 121 into which an acidic solution is charged by a user, a liquid supply path 113 through which the acidic solution charged from the charging port 121 circulates, and an acidic solution flowing through the liquid supply path 113 to the tank 91. A downstream opening 112 (an example of a liquid inlet) to be introduced. In addition, the liquid supply path 113 of the solution charging unit 100 includes an enlarged part whose channel cross-sectional area increases toward the downstream opening 112.

  The sanitary washing device 20 according to this embodiment includes a nozzle 40, a water supply channel 50, a backflow prevention mechanism 90, a solution charging unit 100, and a control unit 200. The nozzle 40 discharges water toward the user's local area. The water supply channel 50 supplies water to the nozzle 40. The backflow prevention mechanism 90 communicates with a tank 91 provided in the water supply channel 50 and an upstream water supply channel 51 located upstream of the tank 91 in the water supply channel 50, and a water inlet that allows water to flow into the tank 91. 92, an outlet 93 that communicates with the downstream water supply passage 52 located downstream of the tank 91 in the water supply passage 50, and discharges the water inside the tank 91 to the downstream water supply passage 52, and the water inlet 92. An overflow port 94 is provided so as to form an air gap therebetween, and discharges excess water inside the tank 91. The solution input unit 100 supplies the acidic solution input by the user to the tank 91. When the control unit 200 receives an instruction to shift to the scale removal mode, the controller 200 fills the downstream side water supply path 52 and the nozzle 40 with the acidic solution stored in the tank 91, and then the downstream side water supply path 52 and the nozzle 40. A descaling process is performed to discharge the acidic solution. Moreover, the control part 200 performs a scale removal process, after performing the waste_water | drain process which discharges the water inside the tank 91, when the transfer instruction | indication to scale removal mode is received.

  Therefore, according to the sanitary washing device 20 according to the present embodiment, it is possible to prevent the acidic solution from adhering to the peripheral members arranged around the tank 91 that stores the acidic solution.

  In the above-described embodiment, the waste water treatment is performed before the scale removal processing. Without being limited thereto, the control unit 200 does not perform wastewater treatment when the float switch 95 detects that the water level inside the tank 91 is lower than a low water level that is lower than half the full water level H1. The scale removal process may be executed. For example, when the float switch 95 detects that the water level inside the tank 91 is the air level H2, the control unit 200 may omit the waste water treatment. By doing so, the descaling process can be started at an early stage, and the waiting time of the user can be shortened.

  In the above-described embodiment, an example in which the water level detection unit that detects the water level inside the tank 91 is the float switch 95 has been described, but the water level detection unit does not necessarily need to be the float switch 95. For example, the water level detection unit may be a liquid level sensor or the like.

(Second Embodiment)
Next, another configuration example of the main body included in the solution charging unit will be described with reference to FIGS. FIG. 14 is a perspective view of the main body portion of the solution charging section according to the second embodiment, and FIG. 15 is a bottom view of the main body section of the solution charging section according to the second embodiment. FIG. 16 is a perspective view of the main body in a state in which a cover body described later is removed.

  As shown in FIGS. 14 and 15, the main body 101 </ b> A according to the second embodiment has the downstream side of the liquid supply passage 113 </ b> A extending downward, and is open downstream in the vertical direction at the downstream end thereof. A side opening 112A is provided.

  Specifically, as shown in FIG. 16, the liquid supply path 113A of the main body 101A according to the second embodiment includes a third extension portion in addition to the first extension portion 113a and the second extension portion 113b. 113c. The third extending portion 113c extends in the vertical direction, communicates with the second extending portion 113b on the upstream side, and communicates with the downstream opening 112A on the downstream side.

  The channel cross-sectional area in the third extending portion 113c is larger than the channel cross-sectional area in the upstream end portion of the second extending portion 113b where the enlarged portion is provided, and in the downstream end portion of the second extending portion 113b. It is smaller than the channel cross-sectional area.

  The cover body 114 is a member that constitutes a part of the third extending portion 113c, and is provided so as to be detachable from the main body 101A.

  As described above, the main body 101A according to the second embodiment includes the third extending portion 113c extending downward, and the downstream opening 112A is provided at the downstream end of the third extending portion 113c. It was decided. Thereby, compared with the main-body part 101 which concerns on 1st Embodiment, 112 A of downstream opening parts can be closely approached to the upper opening 911 of the tank 91. FIG. Therefore, it is possible to suppress the acidic solution flowing out from the downstream opening 112A from adhering to the peripheral members of the tank 91.

  In addition, it is preferable that the 3rd extension part 113c is extended to the same height position as the upper opening 911 (refer FIG. 3) of the tank 91, or a position lower than the upper opening 911, for example. In other words, the downstream opening 112A of the main body 101A is preferably disposed at the same height position as the upper opening 911 of the tank 91 or at a position lower than the upper opening 911. By comprising in this way, it can suppress more reliably that the acidic solution which flowed out out of the downstream opening part 112A adheres to the peripheral member of the tank 91.

  Further effects and modifications can be easily derived by those skilled in the art. Thus, the broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications can be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

A water pipe 1 toilet device 10 toilet 20 sanitary washing device 40 nozzle 50 water supply channel 51 upstream water supply channel 52 downstream water supply channel 70 heat exchanger 90 backflow prevention mechanism 91 tank 92 water inlet 93 outlet 94 overflow port 95 float switch 100 Solution inlet 101 Main body 102 Funnel 111 Upstream opening 112 Downstream opening 113 Liquid supply path 200 Control unit

Claims (8)

A nozzle that discharges water toward the user's local area;
A water supply channel for supplying water to the nozzle;
A tank provided in the water supply channel; a water inlet that communicates with an upstream water supply channel located upstream of the tank in the water supply channel; and a water inlet that allows water to flow into the tank; An air gap is formed between the water inlet and an outlet that communicates with a downstream water supply channel located downstream from the tank and allows water in the tank to flow out to the downstream water supply channel. A backflow prevention mechanism comprising an overflow port for discharging excess water inside the tank;
A charging port into which an acidic solution is charged by a user, a liquid supply channel for circulating the acidic solution charged from the charging port, and a liquid charging port for allowing the acidic solution flowing through the liquid supply channel to flow into the tank. A solution charging part, and
The sanitary washing apparatus, wherein the liquid supply path of the solution charging section includes an enlarged portion whose flow path cross-sectional area increases toward the liquid inlet. The liquid supply path is
A first extending portion communicating with the inlet and extending in a vertical direction;
A second extending portion that communicates with the liquid inlet and extends in a horizontal direction,
The sanitary washing device according to claim 1, wherein the enlarged portion is provided in the second extending portion. The sanitary washing device according to claim 2, wherein the channel width in the second direction is greater in the horizontal direction than the channel width in the vertical direction. The liquid supply path is
4. The sanitary washing device according to claim 2, wherein both the vertical flow path width and the horizontal flow path width increase toward the liquid inlet in the expansion section. 5. The solution charging part is
The sanitary washing device according to any one of claims 1 to 4, further comprising a funnel portion having an opening area that expands from the downstream side to the input port from the input port. The sanitary washing device according to claim 5, wherein the funnel part is detachable. The solution charging part is
The sanitary washing device according to any one of claims 1 to 6, wherein the acidic solution is dropped at a position farther from the overflow port than a position at which water flowing out from the water inlet falls into the tank. The solution charging part is
The sanitary washing device according to any one of claims 1 to 7, wherein the acidic solution is dropped at a position farther from the outlet than a position at which water flowing out from the water inlet falls into the tank.

Images