Hygienic washing device

Abstract

The present application provides a sanitary washing device which can miniaturize a housing and can suppress the influence of heat from a switching element on a control unit even if the switching element and the control unit are mounted on one control substrate. The sanitary washing device includes a nozzle which discharges washing water; a heat exchanger which heats the washing water by alternating-current power; a cold water flow path which supplies the washing water from a water supply source to the heat exchanger; a switching element which switches the supply state of the alternating-current power to the heat exchanger; a control substrate on which a control unit which operates by direct-current power and controls the switching element is mounted; a heat transfer plate which dissipates heat from the switching element; and a housing which accommodates the nozzle, the heat exchanger, the cold water flow path, the switching element, the control substrate, and the heat transfer plate, the switching element being mounted on the control substrate, and the cold water flow path having a cooling unit which water-cools the heat transfer plate.

Description

Technical Field

[0001] The present invention generally relates to a hygienic cleaning device. Background Technology

[0002] It is well known that in sanitary cleaning devices equipped with nozzles that dispense cleaning water for localized washing, a heat exchanger is installed to heat the cleaning water using alternating current (AC). In such sanitary cleaning devices, the AC power supply to the heat exchanger is switched, for example, using a switching element such as a three-terminal bidirectional switch. Typically, like the functional units included in the sanitary cleaning device, such a switching element operates using direct current (DC) power and is controlled by a control unit.

[0003] In recent years, there has been a demand for miniaturization of the housing in sanitary cleaning devices to improve design. To achieve this miniaturization while housing various functional components, it is possible to mount the switching elements and control unit, which were previously mounted on separate control boards, onto a single control board. However, since the switching elements generate heat during control switching, mounting the switching elements and control unit onto a single control board could potentially affect the control unit due to the heat from the switching elements.

[0004] Patent documents Patent Document 1: Japanese Patent No. 2827900 Summary of the Invention

[0005] The present invention is based on the understanding of such a problem, and the technical problem to be solved is to provide a hygienic cleaning device that can miniaturize the housing, and at the same time suppress the influence of heat from the switching element on the control unit even when the switching element and the control unit are mounted on a control board.

[0006] The first invention is a hygienic washing device, characterized by comprising: a nozzle for dispensing washing water for localized washing; a heat exchanger for heating the washing water supplied to the nozzle using alternating current; a cold water flow path for supplying the washing water from a water source to the heat exchanger; a switching element for switching the supply state of the alternating current to the heat exchanger; a control board equipped with a control unit that operates using direct current and controls the switching element; a heat transfer plate for dissipating heat from the switching element; and a housing for housing the nozzle, the heat exchanger, the cold water flow path, the switching element, the control board, and the heat transfer plate, wherein the switching element is mounted on the control board, and the cold water flow path has a cooling section for water cooling the heat transfer plate.

[0007] According to this hygienic cleaning device, since the switching element is mounted on the control board housing the control unit, the number of parts can be reduced and the housing can be miniaturized compared to mounting the switching element and the control unit on separate control boards. Furthermore, a cooling unit for water-cooling the heat transfer plate, along with a heat transfer plate for dissipating heat from the switching element, can effectively dissipate heat from the switching element. Therefore, even if the switching element and the control unit are mounted on a single control board, the influence of heat from the switching element on the control unit can be suppressed. Additionally, since the cold water flow path has a cooling unit, the heat transfer plate can be water-cooled using the preheating wash water supplied from the water source to the heat exchanger. Therefore, a separate unit for cooling the heat transfer plate is not required, allowing for housing miniaturization. Moreover, water cooling of the heat transfer plate (switching element) is more efficient than air cooling.

[0008] The second invention is a hygienic cleaning device, characterized in that, in the first invention, the heat exchanger is an instantaneous heat exchanger, and the distance between the heat exchanger and the switching element is greater than the distance between the cooling section and the switching element.

[0009] According to this hygienic cleaning device, by making the distance between the heat exchanger and the switching element greater than the distance between the cooling section and the switching element, the heat source, i.e., the heat exchanger, can be positioned away from the switching element, while the cooling section can be positioned close to the switching element. This suppresses the influence of heat from the heat exchanger on the control section mounted on the same control board as the switching element. Furthermore, since the heat exchanger is positioned between the cooling section and the switching element, it prevents the water flowing through the cooling section from being heated by heat from the heat exchanger. This allows for more efficient cooling of the heat transfer plate (switching element).

[0010] The third invention is a hygienic cleaning device characterized in that, in the first or second invention, the housing has a substrate storage portion capable of housing the control substrate in an upright state, the substrate storage portion being disposed at the rear of the housing, and the switching element being mounted on the lower part of the control substrate.

[0011] According to this hygienic cleaning device, for example, when the height of the rear side of the housing is greater than the height of the front side, by providing a substrate storage section at the rear of the housing that can vertically house the control board, it is possible to prevent the housing from becoming too large, while effectively utilizing the internal space of the housing. Furthermore, since the cold water flow path is often located at the bottom of the housing, by mounting the switching element at the bottom of the vertically positioned control board, compared to mounting the switching element at the top of the vertically positioned control board, the cooling section can be miniaturized. This allows for a smaller housing.

[0012] The fourth invention is a sanitary cleaning device, characterized in that, in the third invention, it further includes a valve unit disposed in the cold water flow path, the heat transfer plate is disposed at a position overlapping the valve unit in the front-back direction, and the switching element is disposed at a position overlapping the heat transfer plate in the front-back direction.

[0013] According to this hygienic cleaning device, by arranging the heat transfer plate at a position overlapping the valve unit in the front-to-back direction, and simultaneously arranging the switching element at a position overlapping the heat transfer plate in the front-to-back direction, the cooling section can be miniaturized compared to the case where the heat transfer plate is arranged in a position not overlapping the valve unit in the front-to-back direction, or where the switching element is arranged in a position not overlapping the heat transfer plate in the front-to-back direction. This, in turn, allows for miniaturization of the housing.

[0014] The fifth invention is a sanitary cleaning device characterized in that, in the third invention, the shell has a water receiving portion, at least a portion of which is located below the heat transfer plate for receiving condensation generated on the heat transfer plate, the heat transfer plate being inclined downward from the switching element toward the water receiving portion.

[0015] According to this hygienic cleaning device, since a water receiving part for collecting condensation water generated on the heat transfer plate is located below the heat transfer plate, and the heat transfer plate is inclined downwards from the switching element toward the water receiving part, it is possible to suppress the flow of condensation water generated on the heat transfer plate toward the control board side. Therefore, it is possible to prevent control board malfunctions due to condensation water.

[0016] The sixth invention is a sanitary cleaning device, characterized in that, in the third invention, it further comprises: a toilet lid; and a toilet lid opening and closing part for opening and closing the toilet lid, wherein the control board is disposed on one side of the housing in the left-right direction, and the toilet lid opening and closing part is disposed on the other side of the housing in the left-right direction.

[0017] According to this hygienic cleaning device, by providing a control board on one side of the housing in the left-right direction and a lid opening / closing part on the other side of the housing in the left-right direction, the internal space of the housing can be effectively utilized. As a result, the housing can be miniaturized.

[0018] According to the present invention, a hygienic cleaning device is provided that can miniaturize the housing, and can suppress the influence of heat from the switching element on the control unit even when the switching element and the control unit are mounted on a control board. Attached Figure Description

[0019] Figure 1 This is a perspective view of a toilet flushing device equipped with the sanitary cleaning apparatus according to the embodiment. Figure 2 This is a block diagram showing the main structural components of the hygienic cleaning apparatus involved in the embodiment. Figure 3 This is a perspective view showing a portion of the sanitary cleaning apparatus involved in the embodiment. Figure 4 This is a top view showing a portion of the sanitary cleaning apparatus involved in the embodiment. Figure 5 This is a perspective view showing the periphery of the switching element of the hygienic cleaning device according to the embodiment. Figure 6 This is a top view showing the periphery of the switching element of the hygienic cleaning device according to the embodiment. Figure 7 This is a cross-sectional view showing a portion of the sanitary cleaning apparatus involved in the embodiment. Figure 8 This is a cross-sectional view showing a portion of the sanitary cleaning apparatus involved in the embodiment. Figure 9 This is a perspective view showing a portion of the cold water flow path of the sanitary cleaning apparatus according to the embodiment. Figure 10 This is a perspective view showing a portion of the housing of the hygienic cleaning device involved in the embodiment. Symbol Explanation 10-Shell; 11-Shell plate; 12-Shell cover; 13-Baseboard storage section; 14-Water receiving section; 15-Drainage section; 16-Drainage flow path; 20-Toilet seat; 21-Toilet seat opening and closing section; 25-Toilet lid; 26-Toilet lid opening and closing section; 30-Nozzle; 31-Discharge outlet; 32-Nozzle cleaning chamber; 33-Nozzle motor; 40-Heat exchanger; 41-First heater; 42-Second heater; 50-Cold water flow path; 51-Valve unit; 52-Cooling section; 52a-Inflow section; 52b-Outflow section; 52c~52e - Flow paths 1 to 3; 55 - Warm water flow path; 56 - Flow switching valve; 57 - Flow path switching valve; 60 - Switching element; 61 - First switching element; 62 - Second switching element; 70 - Control board; 71 - Control unit; 72 - Input circuit; 73 - Power supply circuit; 75 - Operation unit; 80 - Heat transfer plate; 81 - Part 1; 82 - Part 2; 100 - Sanitary cleaning device; 200 - Toilet; 500 - Flushing device; PS - Power supply; WS - Water supply. Detailed Implementation

[0020] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in each drawing, the same reference numerals are used to denote the same constituent elements, and detailed descriptions are omitted where appropriate. Figure 1 This is a perspective view of a toilet flushing device equipped with the sanitary cleaning apparatus according to the embodiment. like Figure 1As shown, the toilet flushing device 500 according to the embodiment includes a sanitary washing device 100 and a Western-style toilet (hereinafter, for ease of explanation, simply referred to as "toilet") 200. The sanitary washing device 100 is installed on the toilet 200. The sanitary washing device 100 has a housing 10, a toilet seat 20, and a toilet lid 25.

[0021] In this application specification, such as Figure 1 As shown, "above", "below", "front", "back", "right side", and "left side" are the directions observed by the user sitting on toilet seat 20.

[0022] The housing 10 has a housing plate 11 and a housing cover 12. The housing plate 11 is located at the lower part of the housing 10. The housing plate 11 is placed above the rear part of the toilet bowl 200. The housing cover 12 is provided on the housing plate 11 and covers the upper part of the housing plate 11. The housing 10 houses functional parts such as the nozzle 30, which will be described later, inside the space surrounded by the housing plate 11 and the housing cover 12.

[0023] The toilet seat 20 is supported on the housing 10 by means of the toilet seat opening and closing part 21 described later. The toilet cover 25 is supported on the housing 10 by means of the toilet cover opening and closing part 26 described later. Figure 1 The text indicates that the toilet seat 20 and the toilet lid 25 are closed. When the toilet seat 20 and the toilet lid 25 are closed, the toilet lid 25 covers the top of the toilet seat 20.

[0024] Figure 2 This is a block diagram showing the main structural components of the hygienic cleaning apparatus involved in the embodiment. Figure 2 The diagram also shows the main structure of the water system and the main structure of the electrical system of the sanitary cleaning device 100. like Figure 2 As shown, the sanitary cleaning device 100 includes a nozzle 30, a heat exchanger 40, a cold water flow path 50, a warm water flow path 55, a switching element 60, and a control board 70. The nozzle 30, heat exchanger 40, cold water flow path 50, warm water flow path 55, switching element 60, and control board 70 are housed inside the casing 10.

[0025] The nozzle 30 dispenses cleaning water for localized washing. At the tip of the nozzle 30, there is a discharge port 31 for dispensing cleaning water. The nozzle 30 dispenses cleaning water supplied from a water source WS, such as a tap water pipe or a water tank, from the discharge port 31 to clean a specific area (e.g., the buttocks) of the user sitting on the toilet seat 20.

[0026] A nozzle cleaning chamber 32 is provided around the nozzle 30. The nozzle cleaning chamber 32 discharges sterilizing water or cleaning water from a water discharge part (not shown) provided inside it, thereby sterilizing or cleaning the outer peripheral surface (body) of the nozzle 30. The nozzle cleaning chamber 32 can sterilize or clean the discharge port 31 of the nozzle 30 when it is housed inside the housing 10.

[0027] The nozzle 30 is driven by the nozzle motor 33 to move forward and backward. The nozzle motor 33 drives the nozzle 30 into the basin of the toilet bowl 200 or retracts the nozzle 30 into the housing 10. The nozzle 30 is then stored inside the housing 10 in its retracted state.

[0028] Heat exchanger 40 heats the washing water supplied to nozzle 30 using alternating current. Heat exchanger 40 is, for example, a ceramic heater. Heat exchanger 40 is, for example, an instantaneous heat exchanger without a water tank. Instantaneous heat exchangers do not require water storage in a tank or the like; instead, water is heated while flowing through them. Heat exchanger 40 can also be, for example, a hot water storage heat exchanger with a water tank. Hot water storage heats water stored in a tank.

[0029] In this example, heat exchanger 40 has a first heater 41 and a second heater 42. The first heater 41 is, for example, a main heater with a larger output. The second heater 42 is, for example, an auxiliary heater with a smaller output. The resistance value of the second heater 42 is, for example, lower than that of the first heater 41. Heat exchanger 40 heats the wash water supplied from the water source WS through the first heater 41 and the second heater 42. The number of heaters provided in heat exchanger 40 is not limited to two, but can be one or more.

[0030] The cold water flow path 50 supplies wash water from the water supply source WS to the heat exchanger 40. The cold water flow path 50 is located between the water supply source WS and the heat exchanger 40, connecting them. The wash water (cold water) flows in the cold water flow path 50 before being heated by the heat exchanger 40. The cold water flow path 50 is located closer to the upstream side than the heat exchanger 40.

[0031] A valve unit 51 is provided on the cold water flow path 50. The valve unit 51 is an electrically controllable valve. The valve unit 51 controls the start and stop of the supply of wash water from the water supply source WS to the heat exchanger 40 by opening and closing. The valve unit 51 may include, for example, a solenoid valve. The valve unit 51 may also include, for example, a solenoid valve and a pressure reducing valve.

[0032] A warm water flow path 55 supplies washing water from the heat exchanger 40 to the nozzle 30. The warm water flow path 55 is located between the heat exchanger 40 and the nozzle 30, connecting them. The washing water (warm water) heated by the heat exchanger 40 flows through the warm water flow path 55. The warm water flow path 55 is located closer to the downstream side than the heat exchanger 40.

[0033] The warm water flow path 55 is equipped with: a flow rate switching valve 56 for adjusting the flow rate; and a flow path switching valve 57 for switching the start and stop of water supply to the nozzle 30 and the nozzle cleaning chamber 32, and for switching the water supply destination. The flow rate switching valve 56 adjusts the flow rate of water flowing to the nozzle 30. The flow path switching valve 57 can switch the water supply destination (the connection position of the warm water flow path 55) to either the nozzle 30 or the nozzle cleaning chamber 32. The flow rate switching valve 56 and the flow path switching valve 57 can also be installed as a unit.

[0034] Switching element 60 switches the state of AC power supply to heat exchanger 40. More specifically, switching element 60 switches the state of AC power supply to heater of heat exchanger 40. Switching element 60 switches between a state of supplying AC power to heater of heat exchanger 40 and a state of not supplying AC power to heater of heat exchanger 40 (i.e., stopping the supply of AC power to heater). Thus, switching element 60 controls the start and stop of heating in heat exchanger 40.

[0035] The switching element 60 is, for example, a semiconductor switch. A thyristor or a three-terminal bidirectional switch may be used in the switching element 60, for example. The switching element 60 may be any element capable of controlling the on / off state of current and allowing current to flow in at least one direction. The switching element 60 may also be configured by combining multiple semiconductor switches, etc.

[0036] In this example, the switching element 60 has a first switching element 61 and a second switching element 62. The first switching element 61 is electrically connected to the first heater 41, switching the AC power supply to the first heater 41. The second switching element 62 is electrically connected to the second heater 42, switching the AC power supply to the second heater 42. The number of switching elements 60 is only required to be the same as the number of heaters installed in the heat exchanger 40, and is not limited to two; it can be one or more.

[0037] The sanitary cleaning device 100 includes a toilet seat opening / closing part 21 and a toilet lid opening / closing part 26. The toilet seat opening / closing part 21 may include, for example, an electric opening / closing unit for electrically opening and closing the toilet seat 20. The toilet seat opening / closing part 21 may also include, for example, a buffer mechanism for slowly opening and closing the toilet seat 20. The toilet lid opening / closing part 26 may include, for example, an electric opening / closing unit for electrically opening and closing the toilet lid 25. The toilet lid opening / closing part 26 may be provided as needed and may be omitted.

[0038] The control board 70 is equipped with a control unit 71 for controlling various parts of the aforementioned sanitary cleaning device 100. The control unit 71 operates using direct current power. The control unit 71 is electrically connected to switching elements 60 (first switching element 61 and second switching element 62) and controls the switching elements 60 (first switching element 61 and second switching element 62). For example, the control unit 71 is electrically connected to valve unit 51 and controls valve unit 51. For example, the control unit 71 is electrically connected to flow switching valve 56 and flow path switching valve 57 and controls flow switching valve 56 and flow path switching valve 57. For example, the control unit 71 is electrically connected to nozzle motor 33 and controls nozzle motor 33. For example, the control unit 71 is electrically connected to toilet seat opening / closing part 21 and toilet lid opening / closing part 26 and controls toilet seat opening / closing part 21 and toilet lid opening / closing part 26.

[0039] The user can operate the control unit 75, for example, to start or stop the dispensing of cleaning water from the nozzle 30. The user can also operate the control unit 75 to set the temperature of the cleaning water heated in the heat exchanger 40. The control unit 75 can be, for example, a remote control installed on the bathroom wall. The control unit 75 can also be, for example, an operation panel integrally installed on the housing 10 of the sanitary cleaning device 100.

[0040] AC power is supplied to heat exchanger 40 from power source PS. Power source PS is an AC power source. Power source PS is, for example, an industrial power source of AC 100V (RMS).

[0041] Alternating current from the power supply PS is supplied to the heat exchanger 40 via the input circuit 72. The input circuit 72 is located in the path between the power supply PS and the heaters of the heat exchanger 40. The heaters of the heat exchanger 40 (first heater 41 and second heater 42) are connected to the input circuit 72 via switching elements 60 (first switching element 61 and second switching element 62).

[0042] A portion of the AC power supplied from the power source PS to the input circuit 72 is supplied to the heaters (first heater 41 and second heater 42) of the heat exchanger 40 via switching elements 60 (first switching element 61 and second switching element 62). When the first switching element 61 is ON, it supplies the AC power from the power source PS (input circuit 72) to the first heater 41. When the first switching element 61 is OFF, it stops supplying the AC power from the power source PS (input circuit 72) to the first heater 41. When the second switching element 62 is ON, it supplies the AC power from the power source PS (input circuit 72) to the second heater 42. When the second switching element 62 is OFF, it stops supplying the AC power from the power source PS (input circuit 72) to the second heater 42.

[0043] A portion of the AC power supplied from the power source PS to the input circuit 72 is converted into DC power by the power supply circuit 73 and supplied to the control unit 71. The power supply circuit 73, located in the path between the input circuit 72 and the control unit 71, converts the AC power supplied from the power source PS into DC power and supplies the converted DC power to the control unit 71. The control unit 71 operates, for example, based on the DC power supplied from the power supply circuit 73.

[0044] The input circuit 72 and the power supply circuit 73 are mounted on the control board 70. The input circuit 72 and the power supply circuit 73 supply a portion of the AC power supplied from the power supply PS to the heat exchanger 40 in AC power mode, and supply the other portion of the AC power supplied from the power supply PS to the control unit 71 in DC power mode.

[0045] Furthermore, the control unit 71 can also operate based on DC power supplied from a DC power source other than the power supply PS (such as a battery). In this case, the power supply circuit 73 can be omitted.

[0046] In this embodiment, the switching element 60 is mounted on the control board 70. In other words, the switching element 60 and the control unit 71 are mounted on the same control board 70. In this way, since the switching element 60 is mounted on the control board 70 on which the control unit 71 is mounted, the number of parts can be reduced and the housing 10 can be miniaturized compared to the case where the switching element 60 and the control unit 71 are mounted on their respective control boards.

[0047] On the other hand, the switching element 60 generates heat due to the control of switching the supply state of AC power to the heat exchanger 40. Therefore, if the switching element 60 and the control unit are mounted on a control board 70, the control unit 71 may be affected by the heat from the switching element 60. Therefore, in this embodiment, a cooling mechanism for cooling the switching element 60 is provided.

[0048] The cooling mechanism used to cool the switching element 60 will be described below. Figure 3 This is a perspective view showing a portion of the sanitary cleaning apparatus involved in the embodiment. Figure 4 This is a top view showing a portion of the sanitary cleaning apparatus involved in the embodiment. Figure 5 This is a perspective view showing the periphery of the switching element of the hygienic cleaning device according to the embodiment. Figure 3 and Figure 4 The text indicates the state of the casing 12 being removed. like Figures 3-5 As shown, a heat transfer plate 80 for dissipating heat from the switching element 60 is provided below the switching element 60.

[0049] The heat transfer plate 80 is, for example, a metal plate. In this example, the heat transfer plate 80 is fixed to the switching element 60 in contact with the switching element 60. The heat transfer plate 80 only needs to be placed near the switching element 60 (e.g., at the location where the heat transfer of the switching element 60 occurs), and it may not need to be in contact with the switching element 60. Alternatively, the heat transfer plate 80 may not need to be fixed to the switching element 60.

[0050] The heat transfer plate 80 has a first portion 81 and a second portion 82. The first portion 81 extends generally horizontally forward from the control substrate 70, for example. The first portion 81 is located below the switching element 60, for example. The first portion 81 is fixed to the switching element 60 in contact with it. The first portion 81 is fixed to the switching element 60 from below, for example, by bolts or the like. The second portion 82 extends downward in a forward-facing direction from the first portion 81.

[0051] Additionally, the cold water flow path 50 includes a cooling section 52 for water cooling the heat transfer plate 80. The cooling section 52 is fixed to the second portion 82 of the heat transfer plate 80 in contact with it. In this example, the cooling section 52 is disposed between the valve unit 51 and the heat exchanger 40. That is, in this example, the cooling section 52 is disposed closer to the downstream end of the valve unit 51. The cooling section 52 could also be disposed closer to the upstream end of the valve unit 51.

[0052] The wash water supplied from the water source WS to the cold water flow path 50 is then supplied to the heat exchanger 40 after flowing through the valve unit 51 and the cooling section 52. At this time, the cooling section 52 uses the wash water flowing through it to water-cool the heat transfer plate 80, which absorbs heat from the switching element 60. In other words, the heat transfer plate 80 and the cooling section 52 function as radiators to dissipate heat from the switching element 60.

[0053] By providing a heat transfer plate 80 for dissipating heat from the switching element 60, and a cooling unit 52 for water cooling the heat transfer plate 80, heat from the switching element 60 can be effectively dissipated. Therefore, even if the switching element 60 and the control unit 71 are mounted on a single control board 70, the influence of heat from the switching element 60 on the control unit 71 can be suppressed. Furthermore, since the cold water flow path 50 has the cooling unit 52, the heat transfer plate 80 can be water-cooled using the preheating wash water supplied from the water supply source WS to the heat exchanger 40. Therefore, a separate unit for cooling the heat transfer plate 80 is not required, allowing for miniaturization of the housing 10. Moreover, water cooling of the heat transfer plate 80 (switching element 60) is more efficient than air cooling.

[0054] Preferably, the heat exchanger 40 is positioned away from the switching element 60. Additionally, the cooling unit 52 is preferably positioned close to the switching element 60. More specifically, the distance L2 between the heat exchanger 40 and the switching element 60 is preferably greater than the distance L1 between the cooling unit 52 and the switching element 60.

[0055] By making the distance L2 greater than the distance L1, the heat source, i.e., the heat exchanger 40, can be positioned away from the switching element 60, while the cooling section 52 can be positioned close to the switching element 60. This suppresses the influence of heat from the heat exchanger 40 on the control section 70, which is mounted on the same control board 70 as the switching element 60. Furthermore, since the heat exchanger 40 is positioned between the cooling section 52 and the switching element 60, it suppresses the water flowing through the cooling section 52 from being heated by heat from the heat exchanger 40. This allows for more efficient cooling of the heat transfer plate 80 (switching element 60).

[0056] The housing 10 has a substrate storage section 13 that can house the control substrate 70 in an upright position. The control substrate 70 is configured, for example, with the surface forming the circuit facing forward and backward. The control substrate 70 is configured, for example, with the surface housing the switching element 60 facing forward. The control substrate 70 can be configured along the vertical direction, or it can be configured to be tilted forward or backward relative to the vertical direction. In addition, when the control substrate 70 is tilted, it is preferable that the tilt angle is 45 degrees or less relative to the vertical direction, more preferably 30 degrees or less relative to the vertical direction, and even more preferably 15 degrees or less relative to the vertical direction.

[0057] The substrate storage portion 13 (control substrate 70) is provided, for example, at the rear of the housing 10. At least a portion of the substrate storage portion 13 is located, for example, closer to the rear than the center CL1 in the front-rear direction of the housing 10. The front end of the substrate storage portion 13 is, for example, located closer to the rear than the center CL1 in the front-rear direction of the housing 10.

[0058] For example, when the height of the rear side of the shell 10 is higher than the height of the front side of the shell 10, by providing a substrate storage part 13 at the rear of the shell 10 that can store the control substrate 70 in an upright state, it is possible to prevent the shell 10 from becoming too large, while effectively utilizing the space inside the shell 10.

[0059] Additionally, the substrate storage portion 13 (control substrate 70) is provided, for example, on one side of the housing 10 in the left-right direction. The lid opening and closing portion 26 is provided, for example, on the other side of the housing 10 in the left-right direction. In this example, the substrate storage portion 13 (control substrate 70) is provided on the right side of the housing 10, and the lid opening and closing portion 26 is provided on the left side of the housing 10. The substrate storage portion 13 (control substrate 70) is provided, for example, on the opposite side of the lid opening and closing portion 26 in the left-right direction, separated by the nozzle 30.

[0060] A control board 70 is provided on one side of the shell 10 in the left-right direction, and a cover opening and closing part 26 is provided on the other side of the shell 10 in the left-right direction, thereby effectively utilizing the internal space of the shell 10. As a result, the shell 10 can be miniaturized.

[0061] The switching element 60 is configured to protrude forward from the control board 70. On the control board 70, the first switching element 61 and the second switching element 62 are arranged in a left-right direction.

[0062] The switching element 60 is mounted, for example, on the lower part of the control substrate 70. At least a portion of the switching element 60 is located, for example, closer to the lower part than the center CL2 in the vertical direction of the control substrate 70. The upper end of the switching element 60 is, for example, located closer to the lower part than the center CL2 in the vertical direction of the control substrate 70.

[0063] Since the cold water flow path 50 is often located at the lower part of the housing 10, by mounting the switching element 60 at the lower part of the control board 70 in its upright state, the cooling section 52 can be miniaturized compared to mounting the switching element 60 at the upper part of the control board 70 in its upright state. As a result, the housing 10 can be miniaturized.

[0064] The heat transfer plate 80 is disposed, for example, in a position that overlaps with the valve unit 51 in the front-to-back direction. Similarly, the switching element 60 is disposed, for example, in a position that overlaps with the heat transfer plate 80 in the front-to-back direction. The heat transfer plate 80 is disposed, for example, between the valve unit 51 and the switching element 60 in the front-to-back direction.

[0065] By arranging the heat transfer plate 80 at a position overlapping the valve unit 51 in the front-back direction, and simultaneously arranging the switching element 60 at a position overlapping the heat transfer plate 80 in the front-back direction, the cooling section 52 can be miniaturized compared to the case where the heat transfer plate 80 is not overlapping the valve unit 51 in the front-back direction, or where the switching element 60 is not overlapping the heat transfer plate 80 in the front-back direction. This, in turn, allows for the miniaturization of the housing 10.

[0066] The flow of cleaning water in the cooling section 52 will be described in more detail below. Figure 6 This is a top view showing the periphery of the switching element of the hygienic cleaning device according to the embodiment. Figure 7 This is a cross-sectional view showing a portion of the sanitary cleaning apparatus involved in the embodiment. Figure 8 This is a cross-sectional view showing a portion of the sanitary cleaning apparatus involved in the embodiment. Figure 9 This is a perspective view showing a portion of the cold water flow path of the sanitary cleaning apparatus according to the embodiment. Figure 6 The substrate storage section 13 is omitted. Figure 7 yes Figure 6 The sectional view shown is along line A1-A2. Figure 8 yes Figure 6 The sectional view shown is along line B1-B2. like Figures 6-9 As shown, the cooling section 52 has an inlet section 52a, an outlet section 52b, and first to third flow paths 52c to 52e.

[0067] An inlet 52a is located at the upstream end of the cooling section 52. An outlet 52b is located at the downstream end of the cooling section 52. In this example, the outlet 52b is connected to the heat exchanger 40. A first flow path 52c, a second flow path 52d, and a third flow path 52e are provided between the inlet 52a and the outlet 52b. The first to third flow paths 52c to 52e are arranged from the upstream side in the order of first flow path 52c, second flow path 52d, and third flow path 52e.

[0068] In this example, the first flow path 52c extends approximately horizontally rearward from the inlet 52a. The second flow path 52d detours rearward from the connection between the first flow path 52c and the second flow path 52d, and then extends forward. The connection between the second flow path 52d and the third flow path 52e is located closer to the front than the connection between the first flow path 52c and the second flow path 52d. The third flow path 52e extends upward and forward from the connection between the second flow path 52d and the third flow path 52e. The outlet 52b extends approximately horizontally to the left from the upper part of the third flow path 52e.

[0069] Water flowing in from the inlet 52a flows through the first flow path 52c and reaches the second flow path 52d. Water flowing through the second flow path 52d flows through the third flow path 52e and reaches the outlet 52b and flows out to the heat exchanger 40.

[0070] The cooling section 52 contacts the second portion 82 of the heat transfer plate 80 at the second flow path 52d. The cooling section 52 water-cools the second portion 82 of the heat transfer plate 80 by water flowing through the second flow path 52d. By providing a detour structure for the second flow path 52d, the cooling efficiency of the heat transfer plate 80 can be improved.

[0071] The heat exchanger 40 is, for example, positioned in the left-right direction at a location that overlaps with the cooling section 52. The heat exchanger 40 is, for example, positioned in the left-right direction at a location that overlaps with the inflow section 52a.

[0072] Figure 10 This is a perspective view showing a portion of the housing of the hygienic cleaning device involved in the embodiment. Figure 10 Only shell plate 11 is shown in the text. like Figure 10 As shown, the shell plate 11 is provided with a water receiving part 14 for receiving condensation water generated on the heat transfer plate 80.

[0073] like Figure 7 and Figure 8 As shown, at least a portion of the water receiving portion 14 is located below the heat transfer plate 80 (second portion 82). The second portion 82 of the heat transfer plate 80 slopes downward from the switching element 60 toward the water receiving portion 14. As a result, condensation generated on the heat transfer plate 80 is transferred to the second portion 82 and discharged into the water receiving portion 14.

[0074] In addition, the shell plate 11 is provided with: a drain section 15 for draining water from the shell plate 11 into the basin of the toilet 200; and a drain flow path 16 for connecting the water receiving section 14 and the drain section 15. Figure 10 In the diagram, dashed arrows indicate the flow of water as it flows through the water receiving part 14 and exits through the drainage path 16 and then through the drainage part 15.

[0075] The drainage path 16 guides water collected by the water receiving part 14 to the drainage section 15. The drainage path 16 slopes downwards from the water receiving part 14 toward the drainage section 15, for example. Figure 3 As shown, in this example, the drain section 15 is located below the nozzle 30. The drain section 15 is not limited to this, but can be located at a position that overlaps with the basin of the toilet bowl 200 in the vertical direction.

[0076] By providing a water receiving portion 14 for collecting condensation generated on the heat transfer plate 80 below the heat transfer plate 80, and by tilting the heat transfer plate 80 downwards from the switching element 60 toward the water receiving portion 14, it is possible to suppress the flow of condensation generated on the heat transfer plate 80 toward the control board 70. This prevents malfunctions of the control board 70 due to condensation.

[0077] The implementation method may also include the following configuration.

[0078] Composition 1 A hygienic washing device, characterized in that, Features: a nozzle that dispenses cleaning water for spot cleaning; A heat exchanger heats the washing water supplied to the nozzles using alternating current. A cold water flow path supplies the washing water from a water source to the heat exchanger; A switching element switches the state of AC power supply to the heat exchanger; The control board is equipped with a control unit that operates by DC power and controls the switching element; Heat transfer plate, used to dissipate heat from the switching element; The housing includes the nozzle, the heat exchanger, the cold water flow path, the switching element, the control base plate, and the heat transfer plate. The switching element is mounted on the control board. The cold water flow path includes a cooling section for water cooling the heat transfer plate.

[0079] Composition 2 The sanitary cleaning apparatus described in section 1 is characterized by, The heat exchanger is an instantaneous heat exchanger. The distance between the heat exchanger and the switching element is greater than the distance between the cooling section and the switching element.

[0080] Composition 3 The sanitary cleaning apparatus comprising 1 or 2 is characterized by, The housing has a substrate storage section that can accommodate the control substrate in an upright position. The substrate storage portion is located at the rear of the housing. The switching element is mounted on the lower part of the control substrate.

[0081] Composition 4 The sanitary cleaning apparatus comprising any one of the embodiments described in 1 to 3 is characterized by, It also includes a valve unit located in the cold water flow path. The heat transfer plate is positioned at a location that overlaps with the valve unit in the front-to-back direction. The switching element is positioned at a location that overlaps with the heat transfer plate in the front-to-back direction.

[0082] Composition 5 The sanitary cleaning apparatus comprising any one of the embodiments described in 1 to 4 is characterized by, The shell has a water receiving portion, at least a portion of which is located below the heat transfer plate for receiving condensation water generated on the heat transfer plate. The heat transfer plate tilts downwards from the switching element toward the water receiving portion.

[0083] Composition 6 The sanitary cleaning apparatus comprising any one of the embodiments described in 1 to 5 is characterized by, It also features: a toilet seat; and a toilet lid opening and closing part, used to open and close the toilet lid. The control board is located on one side of the shell in the left-right direction. The opening and closing part of the toilet cover is located on the other side of the shell in the left-right direction.

[0084] As described above, according to the embodiments, a hygienic cleaning device is provided that can miniaturize the housing, and can suppress the influence of heat from the switching element on the control unit even when the switching element and the control unit are mounted on a control board.

[0085] The embodiments of the present invention have been described above. However, the present invention is not limited to the above description. Regarding the foregoing embodiments, any invention with appropriate design modifications made by those skilled in the art, as long as it possesses the features of the present invention, is also included within the scope of the present invention. For example, the shape, size, material, and configuration of the various elements of a sanitary cleaning device are not limited to the illustrated contents, but can be appropriately modified. Furthermore, as long as it is technically feasible, the elements of the aforementioned embodiments can be combined, and the resulting technology, as long as it contains the features of the present invention, is also included within the scope of the present invention.

Claims

1. A hygienic washing device, characterized in that, Features: a nozzle that dispenses cleaning water for spot cleaning; A heat exchanger heats the washing water supplied to the nozzles using alternating current. A cold water flow path supplies the washing water from a water source to the heat exchanger; A switching element switches the state of AC power supply to the heat exchanger; The control board is equipped with a control unit that operates by DC power and controls the switching element; Heat transfer plate, used to dissipate heat from the switching element; The housing includes the nozzle, the heat exchanger, the cold water flow path, the switching element, the control base plate, and the heat transfer plate. The switching element is mounted on the control board. The cold water flow path includes a cooling section for water-cooling the heat transfer plate. The housing has a substrate storage section that can accommodate the control substrate in an upright position. The substrate storage portion is located at the rear of the housing. The switching element is mounted on the lower part of the control board. The shell has a water receiving portion, at least a portion of which is located below the heat transfer plate for receiving condensation generated on the heat transfer plate. The heat transfer plate tilts downwards from the switching element toward the water receiving portion. The cooling section contacts the heat transfer plate from above at a position where it slopes downwards from the switching element toward the water receiving section.

2. The sanitary cleaning device according to claim 1, characterized in that, The heat exchanger is an instantaneous heat exchanger. The distance between the heat exchanger and the switching element is greater than the distance between the cooling section and the switching element.

3. The sanitary cleaning device according to claim 1, characterized in that, It also includes a valve unit located in the cold water flow path. The heat transfer plate is positioned at a location that overlaps with the valve unit in the front-to-back direction. The switching element is positioned at a location that overlaps with the heat transfer plate in the front-to-back direction.

4. The sanitary cleaning device according to claim 1, Its characteristics are, It also features: a toilet seat; and a toilet lid opening and closing part, used to open and close the toilet lid. The control board is located on one side of the shell in the left-right direction. The opening and closing part of the toilet cover is located on the other side of the shell in the left-right direction.

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