Sanitary Cleaning Equipment

Abstract

To provide a sanitary cleaning device capable of downsizing a casing and preventing a control unit from being affected by heat from a switching element even if the switching element and the control unit are mounted on a single control board.SOLUTION: A sanitary cleaning device comprises: a nozzle that discharges cleaning water; a heat exchanger that heats the cleaning water with an AC power; a cold-water passage that supplies the cleaning water to the heat exchanger from a water supply source; a switching element that switches over a supply state of the AC power to the heat exchanger; a control board on which a control unit actuated by a DC power and controlling the switching element is mounted; a heat exchanger plate for discharging heat of the switching element; and a casing that accommodates the nozzle, heat exchanger, cold-water passage, switching element, control board and heat exchanger plate. The switching element is mounted on the control board, and the cold-water passage includes a cooling part that cools the heat exchanger plate with cold water.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE Aspects of the present invention generally relate to sanitary washing devices. [Background technology]

[0002] It is known that a sanitary washing device equipped with a nozzle that ejects washing water for washing private parts is provided with a heat exchanger that heats the washing water with AC power. In such a sanitary washing device, the supply state of AC power to the heat exchanger is switched by a switching element such as a triac. Such a switching element is usually controlled by a control unit that operates with DC power, like each functional unit included in the sanitary washing device.

[0003] In recent years, there has been a demand for miniaturizing the casing of sanitary washing devices to improve design. In order to miniaturize the casing while accommodating various functional parts inside, it is conceivable to mount the switching element and the control unit, which were previously mounted on separate control boards, on a single control board. However, since the switching element generates heat when controlling switching, mounting the switching element and the control unit on a single control board may cause the control unit to be affected by the heat from the switching element. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 2827900 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made based on the recognition of such problems, and aims to provide a sanitary washing device that can reduce the size of the casing and prevent the control unit from being affected by heat from the switching element, even when the switching element and control unit are mounted on a single control board. [Means for solving the problem]

[0006] A first invention is a sanitary washing device comprising a nozzle that ejects washing water for washing private parts, a heat exchanger that heats the washing water supplied to the nozzle using AC power, a cold water flow path that supplies the washing water from a water source to the heat exchanger, a switching element that switches the supply state of the AC power to the heat exchanger, a control board mounted with a control unit that operates on DC power and controls the switching element, a heat transfer plate for releasing heat from the switching element, and a casing that houses 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 unit that water-cools the heat transfer plate.

[0007] According to this sanitary washing device, by mounting the switching elements on the control board on which the control unit is mounted, the number of parts can be reduced and the casing can be made smaller than when the switching elements and the control unit are mounted on separate control boards. In addition, by providing a heat transfer plate for dissipating heat from the switching elements and providing a cooling unit for water-cooling the heat transfer plate, the heat from the switching elements can be effectively dissipated. As a result, even if the switching elements and the control unit are mounted on one control board, the control unit can be prevented from being affected by the heat from the switching elements. In addition, since the cold water flow path has a cooling unit, the heat transfer plate can be water-cooled using pre-heated cleaning water supplied from the water supply source to the heat exchanger. As a result, there is no need to provide a separate means for cooling the heat transfer plate, and the casing can be made smaller. In addition, by water-cooling the heat transfer plate, the heat transfer plate (switching elements) can be cooled more efficiently than when the heat transfer plate is air-cooled.

[0008] A second invention is a sanitary cleaning device according to the first invention, wherein the heat exchanger is an instantaneous heat exchanger, and the distance between the heat exchanger and the switching element is longer than the distance between the cooling section and the switching element.

[0009] According to this sanitary washing device, by making the distance between the heat exchanger and the switching element longer than the distance between the cooling unit and the switching element, the heat exchanger, which is a heat source, can be located away from the switching element, and the cooling unit can be located close to the switching element. This makes it possible to prevent the control unit mounted on the same control board as the switching element from being affected by heat from the heat exchanger. In addition, since the heat exchanger can be prevented from being located between the cooling unit and the switching element, it is possible to prevent the water flowing through the cooling unit from being heated by heat from the heat exchanger. This makes it possible to cool the heat transfer plate (switching element) more efficiently.

[0010] A third invention is a sanitary cleaning device according to the first or second invention, wherein the casing has a board storage section capable of storing the control board in an upright position, the board storage section is provided at the rear of the casing, and the switching element is mounted on the lower part of the control board.

[0011] According to this sanitary washing device, for example, when the height of the rear side of the casing is greater than the height of the front side of the casing, by providing a board storage section in the rear of the casing that can store the control board in an upright state, it is possible to prevent the casing from becoming large and to effectively utilize the space inside the casing. Also, since the cold water flow path is often provided in the lower part of the casing, by mounting the switching element on the lower part of the control board in the upright state, it is possible to reduce the size of the cooling section compared to when the switching element is mounted on the upper part of the control board in the upright state. This allows the casing to be made smaller.

[0012] A fourth invention is a sanitary washing device according to the third invention, further comprising a valve unit provided in the cold water flow path, the heat transfer plate being provided at a position overlapping with the valve unit in the front-to-back direction, and the switching element being provided at a position overlapping with the heat transfer plate in the front-to-back direction.

[0013] In this sanitary washing device, by arranging the heat transfer plate so as to overlap with the valve unit in the front-to-rear direction and by arranging the switching element so as to overlap with the heat transfer plate in the front-to-rear direction, it is possible to reduce the size of the cooling section compared to a case in which the heat transfer plate is arranged at a position not overlapping with the valve unit in the front-to-rear direction or a case in which the switching element is arranged at a position not overlapping with the heat transfer plate in the front-to-rear direction, and therefore the casing can be made smaller.

[0014] A fifth invention is a sanitary cleaning device according to the third invention, wherein at least a portion of the casing is located below the heat transfer plate and has a water receiving portion for receiving condensation water that occurs on the heat transfer plate, and the heat transfer plate is inclined downward from the switching element toward the water receiving portion.

[0015] In this sanitary washing device, a water receiving section for receiving condensation water generated on the heat transfer plate is provided below the heat transfer plate, and the heat transfer plate is inclined downward from the switching element toward the water receiving section, thereby preventing the condensation water generated on the heat transfer plate from flowing toward the control board, thereby preventing damage to the control board due to condensation water.

[0016] A sixth invention is a sanitary washing device based on the third invention, further comprising a toilet lid and a toilet lid opening / closing section for opening and closing the toilet lid, wherein the control board is provided on one side of the casing in the left-right direction, and the toilet lid opening / closing section is provided on the other side of the casing in the left-right direction.

[0017] According to this sanitary washing device, the control board is provided on one side of the casing in the left-right direction, and the toilet lid opening and closing part is provided on the other side of the casing in the left-right direction, so that the space inside the casing can be effectively utilized, and the casing can be made smaller. Effect of the Invention

[0018] According to an aspect of the present invention, a sanitary washing device is provided that can reduce the size of the casing and suppresses the control unit from being affected by heat from the switching element, even when the switching element and control unit are mounted on a single control board. [Brief description of the drawings]

[0019] [Figure 1] 1 is a perspective view showing a toilet apparatus equipped with a sanitary washing device according to an embodiment. [Diagram 2] 1 is a block diagram showing a configuration of a main part of a sanitary washing device according to an embodiment. [Diagram 3] FIG. 2 is a perspective view showing a part of the sanitary washing device according to the embodiment. [Figure 4] FIG. 2 is a plan view showing a portion of the sanitary washing device according to the embodiment. [Diagram 5] FIG. 2 is a perspective view showing the periphery of a switching element of the sanitary washing device according to the embodiment. [Figure 6] 2 is a plan view showing the periphery of a switching element of the sanitary washing device according to the embodiment. FIG. [Figure 7] FIG. 2 is a cross-sectional view showing a part of the sanitary washing device according to the embodiment. [Figure 8] FIG. 2 is a cross-sectional view showing a part of the sanitary washing device according to the embodiment. [Figure 9] FIG. 2 is a perspective view showing a part of a cold water flow path of the sanitary washing device according to the embodiment. [Figure 10] 2 is a perspective view showing a part of a casing of the sanitary washing device according to the embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate. FIG. 1 is a perspective view showing a toilet apparatus equipped with a sanitary washing device according to an embodiment. 1, a toilet device 500 according to an embodiment includes a sanitary washing device 100 and a Western-style seated toilet bowl (hereinafter, for convenience of explanation, simply referred to as a "toilet bowl") 200. The sanitary washing device 100 is provided on top of the toilet bowl 200. The sanitary washing device 100 includes a casing 10, a toilet seat 20, and a toilet lid 25.

[0021] In this specification, the terms "upper," "lower," "front," "rear," "right side," and "left side" are directions seen from a user sitting on toilet seat 20 as shown in FIG.

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

[0023] The toilet seat 20 is pivotally supported to the casing 10 via a toilet seat opening / closing part 21 described below so as to be able to be opened and closed. The toilet lid 25 is pivotally supported to the casing 10 via a toilet lid opening / closing part 26 described below so as to be able to be opened and closed. Figure 1 shows the toilet seat 20 and the toilet lid 25 in a closed state. When the toilet seat 20 and the toilet lid 25 are in a closed state, the toilet lid 25 covers the upper part of the toilet seat 20.

[0024] FIG. 2 is a block diagram showing the configuration of a main part of the sanitary washing device according to the embodiment. FIG. 2 shows the main configuration of the water channel system and the main configuration of the electrical system of the sanitary washing device 100 together. 2, the sanitary washing device 100 includes a nozzle 30, a heat exchanger 40, a cold water flow path 50, a hot water flow path 55, a switching element 60, and a control board 70. The nozzle 30, the heat exchanger 40, the cold water flow path 50, the hot water flow path 55, the switching element 60, and the control board 70 are housed inside a casing 10.

[0025] The nozzle 30 ejects wash water for washing the private parts. An outlet 31 for ejecting the wash water is provided at the tip of the nozzle 30. The nozzle 30 ejects wash water supplied from a water supply source WS such as a water mains or a water tank from the outlet 31 to wash the private parts (such as the buttocks) of a user sitting on the toilet seat 20.

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

[0027] The nozzle 30 advances and retreats by receiving a driving force from the nozzle motor 33. The nozzle motor 33 uses its driving force to advance the nozzle 30 into the bowl of the toilet 200, and to retreat the nozzle 30 into the casing 10. When the nozzle 30 is in the retreated state, it is stored inside the casing 10.

[0028] The heat exchanger 40 heats the cleaning water supplied to the nozzle 30 by AC power. The heat exchanger 40 is, for example, a ceramic heater. The heat exchanger 40 is, for example, an instantaneous heat exchanger that does not have a tank. An instantaneous heat exchanger performs heating while flowing water inside, without storing water in a tank or the like. The heat exchanger 40 may be, for example, a hot water storage type heat exchanger that has a tank. A hot water storage type heat exchanger heats water stored in a tank.

[0029] In this example, the 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 large output. The second heater 42 is, for example, a sub-heater with a small output. The resistance value of the second heater 42 is, for example, lower than the resistance value of the first heater 41. The heat exchanger 40 heats the cleaning water supplied from the water supply source WS by the first heater 41 and the second heater 42. The number of heaters provided in the heat exchanger 40 is not limited to two, and may be one, or three 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 provided between the water supply source WS and the heat exchanger 40, and connects the water supply source WS and the heat exchanger 40. Wash water (cold water) before being heated by the heat exchanger 40 flows through the cold water flow path 50. The cold water flow path 50 is a flow path upstream of the heat exchanger 40.

[0031] A valve unit 51 is provided in 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 cleaning water from the water supply source WS to the heat exchanger 40 by opening and closing. The valve unit 51 includes, for example, a solenoid valve. The valve unit 51 may include, for example, a solenoid valve and a pressure reducing valve.

[0032] The hot water flow path 55 supplies cleaning water from the heat exchanger 40 to the nozzle 30. The hot water flow path 55 is provided between the heat exchanger 40 and the nozzle 30, and connects the heat exchanger 40 and the nozzle 30. Cleaning water (hot water) that has been heated by the heat exchanger 40 flows through the hot water flow path 55. The hot water flow path 55 is a flow path downstream of the heat exchanger 40.

[0033] The hot water flow path 55 is provided with a flow rate switching valve 56 that adjusts the flow rate, and a flow path switching valve 57 that starts and stops the supply of water to the nozzle 30 and the nozzle cleaning chamber 32 and switches the 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 supply destination (the connection destination of the hot 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 may be provided as a single unit.

[0034] The switching element 60 switches the state of AC power supply to the heat exchanger 40. More specifically, the switching element 60 switches the state of AC power supply to the heater of the heat exchanger 40. The switching element 60 switches between a state in which AC power is supplied to the heater of the heat exchanger 40 and a state in which AC power is not supplied to the heater of the heat exchanger 40 (i.e., a state in which the supply of AC power to the heater is stopped). In this way, the switching element 60 controls the start and stop of heating in the heat exchanger 40.

[0035] The switching element 60 is, for example, a semiconductor switch. For example, a thyristor or a triac is used for the switching element 60. For example, the switching element 60 may be any element that can control the on / off of a current and can cause a current to flow in at least one direction. For example, the switching element 60 may be configured by combining a plurality of semiconductor switches.

[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 and switches the supply state of AC power to the first heater 41. The second switching element 62 is electrically connected to the second heater 42 and switches the supply state of AC power to the second heater 42. The number of switching elements 60 may be the same as the number of heaters provided in the heat exchanger 40, and is not limited to two, and may be one, or three or more.

[0037] The sanitary washing device 100 has a toilet seat opening / closing unit 21 and a toilet lid opening / closing unit 26. The toilet seat opening / closing unit 21 includes, for example, an electric opening / closing unit for electrically opening and closing the toilet seat 20. The toilet seat opening / closing unit 21 may include, for example, a damper mechanism for slowly opening and closing the toilet seat 20. The toilet lid opening / closing unit 26 includes, for example, an electric opening / closing unit for electrically opening and closing the toilet lid 25. The toilet lid opening / closing unit 26 may include, for example, a damper mechanism for slowly opening and closing the toilet lid 25. The toilet seat opening / closing unit 21 and the toilet lid opening / closing unit 26 are provided as necessary and can be omitted.

[0038] The control board 70 is equipped with a control unit 71 for controlling each part of the sanitary washing device 100 described above. The control unit 71 operates with DC power. The control unit 71 is electrically connected to the switching element 60 (the first switching element 61 and the second switching element 62) and controls the switching element 60 (the first switching element 61 and the second switching element 62). The control unit 71 is electrically connected to, for example, the valve unit 51 and controls the valve unit 51. The control unit 71 is electrically connected to, for example, the flow rate switching valve 56 and the flow path switching valve 57 and controls the flow rate switching valve 56 and the flow path switching valve 57. The control unit 71 is electrically connected to, for example, the nozzle motor 33 and controls the nozzle motor 33. The control unit 71 is electrically connected to, for example, the toilet seat opening / closing unit 21 and the toilet lid opening / closing unit 26 and controls the toilet seat opening / closing unit 21 and the toilet lid opening / closing unit 26.

[0039] A user can, for example, start or stop the discharge of cleaning water from the nozzle 30 by operating the operation unit 75. A user can, for example, set the temperature of the cleaning water heated in the heat exchanger 40 by operating the operation unit 75. The operation unit 75 is, for example, a remote control that is installed on the wall of a toilet room and used. The operation unit 75 may be, for example, an operation panel that is integrally provided in the casing 10 of the sanitary washing device 100.

[0040] AC power is supplied from a power supply PS to the heat exchanger 40. The power supply PS is an AC power supply. The power supply PS is, for example, a commercial power supply of AC 100V (effective value).

[0041] AC power from the power supply PS is supplied to the heat exchanger 40 via an input circuit 72. The input circuit 72 is provided on a path between the power supply PS and the heater of the heat exchanger 40. The heaters (first heater 41 and second heater 42) of the heat exchanger 40 are connected to the input circuit 72 via a switching element 60 (first switching element 61 and second switching element 62).

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

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

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

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

[0046] In the 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. By mounting the switching element 60 on the control board 70 on which the control unit 71 is mounted in this manner, the number of components can be reduced and the casing 10 can be made smaller than when the switching element 60 and the control unit 71 are mounted on separate control boards.

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

[0048] The cooling mechanism for cooling the switching element 60 will be described below. FIG. 3 is a perspective view showing a part of the sanitary washing device according to the embodiment. FIG. 4 is a plan view showing a part of the sanitary washing device according to the embodiment. FIG. 5 is a perspective view showing the periphery of a switching element of the sanitary washing device according to the embodiment. 3 and 4 show a state in which the case cover 12 is removed. As shown in FIGS. 3 to 5, below the switching element 60, a heat transfer plate 80 for dissipating heat from the switching element 60 is provided.

[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 a state of contact with the switching element 60. The heat transfer plate 80 only needs to be provided in the vicinity of the switching element 60 (for example, at a position where the heat of the switching element 60 is transferred), and does not have to be in contact with the switching element 60. In addition, the heat transfer plate 80 does not have to be fixed to the switching element 60.

[0050] The heat transfer plate 80 has a first portion 81 and a second portion 82. For example, the first portion 81 extends substantially horizontally forward from the control board 70. For example, the first portion 81 is located below the switching element 60. The first portion 81 is fixed to the switching element 60 in a state of contact with the switching element 60. For example, the first portion 81 is fixed to the switching element 60 from below by screwing or the like. The second portion 82 extends from the first portion 81 so as to be inclined downward forward.

[0051] The cold water flow path 50 also has a cooling unit 52 that water-cools the heat transfer plate 80. The cooling unit 52 is fixed to the second portion 82 of the heat transfer plate 80 in a state of contact with the second portion 82 of the heat transfer plate 80. In this example, the cooling unit 52 is provided between the valve unit 51 and the heat exchanger 40. That is, in this example, the cooling unit 52 is provided downstream of the valve unit 51. The cooling unit 52 may also be provided upstream of the valve unit 51.

[0052] Cleaning water supplied from the water supply source WS to the cold water flow path 50 is supplied to the heat exchanger 40 through the valve unit 51 and the cooling section 52. At that time, the cooling section 52 cools the heat transfer plate 80 that has absorbed heat from the switching element 60, by the cleaning water passing through the cooling section 52. In other words, the heat transfer plate 80 and the cooling section 52 function as a heat sink for dissipating heat from the switching element 60.

[0053] By providing a heat transfer plate 80 for dissipating heat from the switching element 60 and providing a cooling unit 52 for water-cooling the heat transfer plate 80, the heat from the switching element 60 can be effectively dissipated. As a result, even if the switching element 60 and the control unit 71 are mounted on one control board 70, the control unit 71 can be prevented from being affected by the heat from the switching element 60. Furthermore, since the cold water flow path 50 has the cooling unit 52, the heat transfer plate 80 can be cooled using pre-heated cleaning water supplied from the water supply source WS to the heat exchanger 40. As a result, there is no need to provide a separate means for cooling the heat transfer plate 80, and the casing 10 can be made smaller. Furthermore, by water-cooling the heat transfer plate 80, the heat transfer plate 80 (switching element 60) can be cooled more efficiently than when the heat transfer plate 80 is air-cooled.

[0054] The heat exchanger 40 is preferably disposed away from the switching element 60. Moreover, the cooling unit 52 is preferably disposed close to the switching element 60. More specifically, the distance L2 between the heat exchanger 40 and the switching element 60 is preferably longer than the distance L1 between the cooling unit 52 and the switching element 60.

[0055] By making the distance L2 longer than the distance L1, the heat exchanger 40, which is a heat source, can be disposed away from the switching element 60, and the cooling unit 52 can be disposed closer to the switching element 60. This makes it possible to prevent the control unit 71, which is mounted on the same control board 70 as the switching element 60, from being affected by the heat from the heat exchanger 40. In addition, since it is possible to prevent the heat exchanger 40 from being located between the cooling unit 52 and the switching element 60, it is possible to prevent the water flowing through the cooling unit 52 from being heated by the heat from the heat exchanger 40. This makes it possible to more efficiently cool the heat transfer plate 80 (switching element 60).

[0056] The casing 10 has a board storage section 13 capable of storing the control board 70 in an upright state. The control board 70 is arranged, for example, so that the surface on which the circuit is formed faces the front-rear direction. The control board 70 is arranged, for example, so that the surface on which the switching elements 60 are mounted faces forward. The control board 70 may be arranged along the vertical direction, or may be arranged so as to be inclined forward or backward with respect to the vertical direction. In addition, when the control board 70 is arranged at an angle, the inclination angle is preferably 45 degrees or less with respect to the vertical direction, more preferably 30 degrees or less with respect to the vertical direction, and even more preferably 15 degrees or less with respect to the vertical direction.

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

[0058] For example, if the height of the rear side of the casing 10 is greater than the height of the front side of the casing 10, by providing a board storage section 13 at the rear of the casing 10 that can store the control board 70 in an upright position, it is possible to prevent the casing 10 from becoming larger and to effectively utilize the space inside the casing 10.

[0059] Furthermore, the board storage section 13 (control board 70) is provided, for example, on one side in the left-right direction of the casing 10. The toilet lid opening / closing section 26 is provided, for example, on the other side in the left-right direction of the casing 10. In this example, the board storage section 13 (control board 70) is provided on the right side of the casing 10, and the toilet lid opening / closing section 26 is provided on the left side of the casing 10. The board storage section 13 (control board 70) is provided, for example, on the opposite side in the left-right direction to the toilet lid opening / closing section 26, with the nozzle 30 in between.

[0060] By providing the control board 70 on one side of the casing 10 in the left-right direction and providing the toilet lid opening / closing part 26 on the other side of the casing 10 in the left-right direction, the space inside the casing 10 can be utilized effectively. This allows the casing 10 to be made more compact.

[0061] The switching element 60 is provided so as to protrude forward from the control board 70. The first switching element 61 and the second switching element 62 are provided so as to be aligned in the left-right direction on the control board 70.

[0062] The switching element 60 is mounted, for example, on the lower part of the control board 70. At least a part of the switching element 60 is located, for example, below the center CL2 in the up-down direction of the control board 70. The upper end of the switching element 60 is located, for example, below the center CL2 in the up-down direction of the control board 70.

[0063] Since the cold water flow path 50 is often provided in the lower part of the casing 10, by mounting the switching element 60 on the lower part of the control board 70 in the upright position, the cooling unit 52 can be made smaller than when the switching element 60 is mounted on the upper part of the control board 70 in the upright position. This allows the casing 10 to be made smaller.

[0064] The heat transfer plate 80 is provided, for example, at a position overlapping with the valve unit 51 in the front-rear direction. Moreover, the switching element 60 is provided, for example, at a position overlapping with the heat transfer plate 80 in the front-rear direction. The heat transfer plate 80 is provided, for example, between the valve unit 51 and the switching element 60 in the front-rear direction.

[0065] By providing the heat transfer plate 80 at a position overlapping the valve unit 51 in the front-to-rear direction and providing the switching element 60 at a position overlapping the heat transfer plate 80 in the front-to-rear direction, the cooling section 52 can be made smaller than when the heat transfer plate 80 is provided at a position not overlapping the valve unit 51 in the front-to-rear direction or when the switching element 60 is provided at a position not overlapping the heat transfer plate 80 in the front-to-rear direction. This allows the casing 10 to be made smaller.

[0066] The flow of cleaning water in the cooling section 52 will be described in more detail below. FIG. 6 is a plan view showing the periphery of a switching element of a sanitary washing device according to an embodiment. FIG. 7 is a cross-sectional view showing a part of the sanitary washing device according to the embodiment. FIG. 8 is a cross-sectional view showing a part of the sanitary washing device according to the embodiment. FIG. 9 is a perspective view showing a part of a cold water flow path of a sanitary washing device according to an embodiment. In FIG. 6, the substrate storage section 13 is omitted. FIG. 7 is a cross-sectional view taken along line A1-A2 shown in FIG. FIG. 8 is a cross-sectional view taken along line B1-B2 shown in FIG. As shown in FIGS. 6 to 9, the cooling section 52 has an inlet section 52a, an outlet section 52b, and first to third flow paths 52c to 52e.

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

[0068] In this example, the first flow path 52c extends from the inlet portion 52a toward the rear in a substantially horizontal manner. The second flow path 52d extends forward after making a detour toward the rear from the connection portion between the first flow path 52c and the second flow path 52d. The connection portion between the second flow path 52d and the third flow path 52e is located forward of the connection portion between the first flow path 52c and the second flow path 52d. The third flow path 52e extends upward and forward from the connection portion between the second flow path 52d and the third flow path 52e. The outlet portion 52b extends from the upper portion of the third flow path 52e toward the left side in a substantially horizontal manner.

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

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

[0071] The heat exchanger 40 is provided, for example, in a position overlapping with the cooling portion 52 in the left-right direction. The heat exchanger 40 is provided, for example, in a position overlapping with the inlet portion 52a in the left-right direction.

[0072] FIG. 10 is a perspective view showing a part of a casing of the sanitary washing device according to the embodiment. In FIG. 10, only the case plate 11 is shown. As shown in FIG. 10, the case plate 11 is provided with a water receiving portion 14 for receiving condensed water generated on the heat transfer plate 80. As shown in FIG.

[0073] 7 and 8, 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 is inclined downward from the switching element 60 toward the water receiving portion 14. As a result, condensation water generated on the heat transfer plate 80 flows down the second portion 82 and is drained to the water receiving portion 14.

[0074] Additionally, case plate 11 is provided with drainage section 15 for draining water on case plate 11 into the bowl of toilet 200, and drainage flow path 16 connecting water receiving section 14 and drainage section 15. In Fig. 10, the flow of water received in water receiving section 14 is shown by dashed arrows as it passes through drainage flow path 16 and is discharged from drainage section 15.

[0075] The drainage flow path 16 guides the water received in the water receiving portion 14 to the drainage portion 15. The drainage flow path 16 is, for example, inclined downward from the water receiving portion 14 toward the drainage portion 15. As shown in Fig. 3, in this example, the drainage portion 15 is provided below the nozzle 30. The drainage portion 15 is not limited to this, and may be provided in a position that overlaps with the bowl of the toilet 200 in the vertical direction.

[0076] By providing the water receiving portion 14 for receiving condensation water generated on the heat transfer plate 80 below the heat transfer plate 80 and by slanting the heat transfer plate 80 downward from the switching element 60 toward the water receiving portion 14, it is possible to prevent the condensation water generated on the heat transfer plate 80 from flowing toward the control board 70. This makes it possible to prevent the control board 70 from being damaged by the condensation water.

[0077] The embodiment may include the following features.

[0078] (Configuration 1) A nozzle for discharging cleaning water for local cleaning; a heat exchanger that heats the cleaning water supplied to the nozzle by AC power; a cold water flow path for supplying the cleaning water from a water supply source to the heat exchanger; A switching element that switches a supply state of the AC power to the heat exchanger; A control board on which a control unit that operates using DC power and controls the switching elements is mounted; a heat transfer plate for dissipating heat from the switching element; a casing that houses the nozzle, the heat exchanger, the cold water flow path, the switching element, the control board, and the heat transfer plate; Equipped with The switching element is mounted on the control board, The cold water flow path has a cooling section that water-cools the heat transfer plate.

[0079] (Configuration 2) The heat exchanger is an instantaneous heat exchanger, 2. The sanitary washing device according to claim 1, wherein a distance between the heat exchanger and the switching element is longer than a distance between the cooling section and the switching element.

[0080] (Configuration 3) the casing has a board storage section capable of storing the control board in an upright state, The substrate storage section is provided at the rear of the casing, The sanitary washing device of configuration 1 or 2, wherein the switching element is mounted on the lower part of the control board.

[0081] (Configuration 4) The cooling water passage further includes a valve unit. The heat transfer plate is provided at a position overlapping with the valve unit in the front-rear direction, The sanitary washing device according to any one of configurations 1 to 3, wherein the switching element is provided at a position overlapping with the heat transfer plate in the front-rear direction.

[0082] (Configuration 5) The casing has at least a portion located below the heat transfer plate and has a water receiving portion for receiving condensation water generated on the heat transfer plate, The sanitary washing device according to any one of configurations 1 to 4, wherein the heat transfer plate is inclined downward from the switching element toward the water receiving portion.

[0083] (Configuration 6) The toilet lid and A toilet lid opening / closing part for opening and closing the toilet lid; Further equipped with The control board is provided on one side of the casing in the left-right direction, The sanitary washing device according to any one of configurations 1 to 5, wherein the toilet lid opening / closing part is provided on the other side in the left-right direction of the casing.

[0084] As described above, according to the embodiment, a sanitary cleaning device is provided that can reduce the size of the casing and suppress the control unit from being affected by heat from the switching element, even when the switching element and control unit are mounted on a single control board.

[0085] The above describes the embodiments of the present invention. However, the present invention is not limited to these descriptions. Any design modifications made by a person skilled in the art to the above-described embodiments are also included within the scope of the present invention as long as they have the characteristics of the present invention. For example, the shape, dimensions, materials, arrangement, etc. of each element of a sanitary washing device are not limited to those exemplified, and can be modified as appropriate. Furthermore, the elements of each of the above-described embodiments can be combined to the extent technically possible, and such combinations are also included within the scope of the present invention as long as they include the features of the present invention. [Explanation of symbols]

[0086] 10: Casing 11: Case plate 12: Case cover 13: Circuit board storage section 14: Water receiving section 15: Drainage section 16: Drainage channel 20:Toilet seat 21: Toilet seat opening and closing part 25: Toilet lid 26:Toilet lid opening / closing part 30: Nozzle 31:Discharge port 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 part 52b:Outflow part 52c to 52e: 1st to 3rd flow paths 55: Hot 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 circuit 75:Operation section 80: Heat transfer plate 81: Part 1 82:Second part 100: Sanitary cleaning device 200:Toilet 500:Toilet equipment PS: Supply power WS: Water source

Claims

1. A nozzle for discharging cleaning water for local cleaning; a heat exchanger that heats the cleaning water supplied to the nozzle by AC power; a cold water flow path for supplying the cleaning water from a water supply source to the heat exchanger; A switching element that switches a supply state of the AC power to the heat exchanger; A control board on which a control unit that operates using DC power and controls the switching elements is mounted; a heat transfer plate for dissipating heat from the switching element; a casing that houses the nozzle, the heat exchanger, the cold water flow path, the switching element, the control board, and the heat transfer plate; Equipped with The switching element is mounted on the control board, The cold water flow path has a cooling portion that water-cools the heat transfer plate, the casing has a board storage section capable of storing the control board in an upright state, The substrate storage section is provided at the rear of the casing, The switching element is mounted on a lower portion of the control board, The casing has at least a portion located below the heat transfer plate and has a water receiving portion for receiving condensation water generated on the heat transfer plate, the heat transfer plate has an inclined portion that is inclined downward from the switching element toward the water receiving portion, A sanitary washing device, wherein the cooling portion is in contact with the inclined portion.

2. The heat exchanger is an instantaneous heat exchanger, The sanitary washing device according to claim 1 , wherein a distance between the heat exchanger and the switching element is longer than a distance between the cooling section and the switching element.

3. The cooling water passage further includes a valve unit. The heat transfer plate is provided at a position overlapping with the valve unit in the front-rear direction, The sanitary washing device according to claim 1 , wherein the switching element is provided at a position overlapping with the heat transfer plate in the front-rear direction.

4. The toilet lid and A toilet lid opening / closing part for opening and closing the toilet lid; Further equipped with The control board is provided on one side of the casing in the left-right direction, The sanitary washing device according to claim 1 , wherein the toilet lid opening / closing portion is provided on the other side in the left-right direction of the casing.

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