JP2015029856A - Heated toilet seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain cleanliness over a long period while can reduce energy required for generation of hot water when making heating of a toilet seat be performed by the hot water.SOLUTION: A drainage circuit 40 for draining water inside a hot water circulation circuit 20 is connected to the hot water circulation circuit 20. The hot water circulation circuit 20 is provided with a first valve 25 capable of changing over between a drainage state of draining the water inside the hot water circulation circuit 20 and a non-drainage state of forbidding the drainage of the water inside the hot water circulation circuit 20.

Description

  The present invention relates to a heated toilet seat used in a Western-style toilet.

  Conventionally, a heated toilet seat configured to heat a toilet seat with warm water is known (see, for example, Patent Documents 1 and 2). The heating toilet seat of Patent Document 1 includes an instantaneous hot water heater and a toilet seat hot water supply pipe, and hot water generated by the hot water heater is supplied to a hot water passage formed in the toilet seat through the toilet seat hot water supply pipe, It is also supplied to a nozzle for cleaning the local part. The water that circulates through the warm water passage of the toilet seat is drained into the toilet from a drain outlet provided in the toilet seat.

  In the heated toilet seat of Patent Document 2, the hot water generated by the hot water heater is supplied to the hot water passage formed in the toilet seat and circulates through the hot water passage. The hot water generated by the hot water heater is also used as hot water for cleaning the local area.

JP 2001-212031 A JP2013-85922A

  In patent documents 1 and 2, the hot water produced | generated with the hot water heater can be utilized as heating of a toilet seat, and warm water for wash | cleaning a local part. However, in patent document 1, the water which distribute | circulated the warm water channel | path of the toilet seat is drained in a toilet bowl. The water circulating in the warm water passage of the toilet seat does not drop to room temperature and is drained to the toilet even though the temperature is higher than room temperature, so it is necessary to generate warm water. Energy is wasted.

  On the other hand, in Patent Document 2, since warm water is circulated through the warm water passage of the toilet seat, energy saving can be achieved as compared with that in Patent Document 1, but the internal water is spoiled by long-term use. It is possible that hygiene is a problem.

  The present invention has been made in view of the above point, and the object of the present invention is to reduce the energy required to generate hot water when heating the toilet seat with hot water, while reducing the energy required for a long period of time. It is to be able to maintain cleanliness throughout.

  In order to achieve the above object, in the present invention, it is possible to supply hot water to a washing nozzle by branching from a hot water circulation circuit that circulates warm water in the toilet seat, and to discharge the hot water circulated through the hot water circulation circuit at a predetermined timing. I made it.

The first invention is
It has a hot water passage (21) formed in the toilet seat (10) and a hot water supply pipe (22) connected to the hot water passage (21), and a water supply source (2 A heater (23) for warming water supplied from the heater (23) to generate hot water, and a pump (24) for supplying the hot water generated by the heater (23) to the hot water passage (21). The hot water generated by the heater (23) is supplied to the hot water passage (21) by the pump (24) and then circulated through the hot water supply pipe (22) again. )When,
Washing nozzles (33, 34) for washing the user's local part of the toilet seat (10), and the warm water circulating circuit (20) connected to the warm water circulation circuit (20), the warm water circulating through the warm water circulation circuit (20) In the heated toilet seat (1) provided with a local cleaning circuit (30) having a hot water pipe (31, 32) for local cleaning for supplying to (33, 34),
A drain circuit (40) for draining water in the warm water circuit (20) is connected to the warm water circuit (20),
The hot water circulation circuit (20) has a drainage switch that can be switched between a drainage state in which water in the hot water circulation circuit (20) is discharged and a non-drainage state in which discharge of water in the hot water circulation circuit (20) is prohibited. A valve (25) is provided.

  According to this configuration, the water supplied from the water supply source is heated by the heater of the hot water supply pipe to become hot water, and this hot water is supplied to the hot water passage of the toilet seat by the pump. While the hot water flows through the hot water passage, heat is released and the toilet seat is heated. When the drainage switching valve is in a non-drainage state, the hot water flowing through the hot water passage again flows into the hot water supply pipe and is then supplied to the hot water passage of the toilet seat. Since the toilet seat can be heated by circulating hot water once warmed, energy saving can be achieved.

  The hot water circulating in the hot water circulation circuit is drained from the hot water circulation circuit when the drain switching valve is set to the drainage state, and then new water is supplied from the water supply source. Thereby, the water in the hot water circulation circuit is kept clean. Moreover, since the warm water which distribute | circulates a warm water circulation circuit is supplied to a washing nozzle by the hot water piping for local washing | cleaning, the warm water which flows out from a washing nozzle also becomes clean.

According to a second invention, in the first invention,
The pump (24) of the hot water circulation circuit (20) is provided on the downstream side of the heater (23),
The upstream side of the local washing hot water pipes (31, 32) is disposed downstream of the heater (23) in the hot water circulation circuit (20) and upstream of the pump (24). It is characterized by that.

  According to this configuration, it is possible to supply hot water to the cleaning nozzle by the water pressure of the water supply source without operating the pump.

According to a third invention, in the first or second invention,
A heat exchanger (80) for exchanging heat between water discharged from the drain circuit (40) and water supplied from the water supply source (2) is provided.

  According to this configuration, when the discharged water is higher than normal temperature, the water supplied from the water supply source to the hot water circulation circuit is heated by the water discharged from the hot water circulation circuit. Energy consumption is reduced.

  According to the first invention, since the toilet seat can be heated while circulating the hot water generated by the heater, energy saving can be achieved. Since the drain circuit is connected to the hot water circulation circuit and the water in the hot water circulation circuit is drained at a predetermined timing, it can be kept clean for a long period of time.

  According to the second invention, since the upstream side of the hot water piping for local cleaning is arranged downstream of the heater in the hot water circulation circuit and upstream of the pump, the water supply source can be operated without operating the pump. Since warm water can be supplied to the washing nozzle by water pressure, further energy saving can be achieved.

  According to the third aspect of the invention, heat exchange is performed between the water discharged from the drain circuit and the water supplied from the water supply source, so that further energy saving can be achieved.

It is a block diagram of the heating toilet seat which concerns on Embodiment 1 of this invention. It is a block diagram of a heating toilet seat. It is operation | movement explanatory drawing of a 1st valve | bulb. It is operation | movement explanatory drawing of a 2nd valve | bulb. It is operation | movement explanatory drawing of a 3rd valve | bulb. It is the FIG. 1 equivalent view which shows the flow of the warm water at the time of toilet seat heating mode. FIG. 2 is a view corresponding to FIG. 1 illustrating a flow of hot water in a nozzle drain mode. It is the FIG. 1 equivalent view which shows the flow of the warm water at the time of 1st local washing | cleaning mode. It is the FIG. 1 equivalent view which shows the flow of the warm water at the time of 2nd local washing | cleaning mode. FIG. 2 is a view corresponding to FIG. 1 illustrating a flow of hot water in a first drainage mode. It is the FIG. 1 equivalent view which shows the flow of the warm water at the time of 2nd drainage mode. FIG. 3 is a view corresponding to FIG. 1 according to a second embodiment. FIG. 3 is a diagram corresponding to FIG. 3 according to a second embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 1 is a diagram showing a schematic configuration of a heating toilet seat 1 according to Embodiment 1 of the present invention. The heating toilet seat 1 is used in a Western-style toilet. The heating toilet seat 1 includes at least a toilet seat 10, a hot water circulation circuit 20, a local cleaning circuit 30, a first drain circuit 40, a second drain circuit 50, and a control device 60 (shown in FIG. 2). . The first drain circuit 40 is provided with a drain pipe 41, and the second drain circuit 50 is provided with a drain pipe 51.

  The toilet seat 10 is used by being mounted on a Western-style toilet (not shown), and may be a resin molded product, for example. Inside the toilet seat 10, a hot water passage 21 constituting a part of the hot water circulation circuit 20 is formed. The hot water passage 21 may be formed by, for example, a gas injection method, or may be formed by embedding a pipe member in the toilet seat 10. Further, the cross section of the hot water passage 21 has a shape in which the width dimension is longer than the vertical dimension so that the hot water can flow over a wide range of the toilet seat 10. In addition, you may provide the warm water channel | path 21 so that the inside of the toilet seat 10 may meander.

  The hot water circulation circuit 20 has a hot water supply pipe 22 in addition to the hot water passage 21. The upstream end of the hot water supply pipe 22 is connected to the downstream end of the hot water passage 21. The downstream end of the hot water supply pipe 22 is connected to the upstream end of the hot water passage 21. Thereby, an annular hot water passage is formed by the hot water passage 21 and the hot water supply pipe 22.

  A heater 23 for heating the water supplied from the water supply source 2 to generate hot water and a pump 24 for supplying the hot water generated by the heater 23 to the hot water passage 21 are provided in the middle of the hot water supply pipe 22. It has been. The pump 24 can have various structures, and is provided on the downstream side of the heater 23. For example, an electric heater can be used as the heater 23, and specifically, a ceramic heater. The heater 23 is preferably an instantaneous hot water heater capable of instantaneously heating water to about 30 ° C. to 40 ° C. The water supply source 2 can use household water supply, for example. The heater 23 and the pump 24 are controlled by the control device 60.

  The hot water supply pipe 22 is provided with a first valve 25 between the upstream end of the hot water supply pipe 22 and the heater 23, and a second valve 26 is provided between the pump 24 of the heater 23, and the pump A third valve 27 is provided between 24 and the downstream end of the hot water supply pipe 22. The first to third valves 25 to 27 are controlled by the control device 60.

  As the first valve 25, a well-known structure configured to switch the flow path by an electric actuator can be used. As shown in FIG. 3, the first valve 25 is a drainage switching valve, and includes a valve casing 25a and a rod 25b that moves in the valve casing 25a. The flow path is switched by moving the actuator forward and backward. Specifically, the hot water supply pipe 22, the water supply pipe 2 a extending from the water supply source 2, and the drain pipe 41 of the first drain circuit 40 are connected to the valve casing 25 a.

  The basic shape of the rod 25b is solid. A first passage 25c, a second passage 25d, a third passage 25e, and a fourth passage 25f are formed in the rod 25b. The first passage 25c and the second passage 25d are separated from each other in the axial direction of the rod 25b. The first passage 25c is a passage that allows the water supply pipe 2a to communicate with the hot water supply pipe 22 on the downstream side of the first valve 25. The second passage 25 d is a passage that communicates the hot water supply pipe 22 upstream of the first valve 25 and the hot water supply pipe 22 downstream of the first valve 25. The third passage 25e and the fourth passage 25f are separated from the second passage 25d in the axial direction of the rod 25b and are formed at the same position in the axial direction of the rod 25b. The third passage 25 e is a passage that allows the water supply pipe 2 a to communicate with the hot water supply pipe 22 on the downstream side of the first valve 25. The fourth passage 25f is a passage that connects the hot water supply pipe 22 upstream of the first valve 25 and the drain pipe 41.

  As shown in FIG. 4, the basic structure of the second valve 26 is the same as that of the first valve 25. The second valve 26 includes a valve casing 26a and a rod 26b. The second valve 26 is formed on a pipe and a rod 26b connected to the valve casing 26a. There are different passages. That is, the hot water supply pipe 22, the first pipe (local cleaning hot water pipe) 31 and the second pipe (local cleaning hot water pipe) 32 of the local cleaning circuit 30 are connected to the valve casing 26a.

  The rod 26b is formed with a first passage 26c, a second passage 26d, a third passage 26e, and a fourth passage 26f.

  The first passage 26c, the second passage 26d, the third passage 26e, and the fourth passage 26f are separated from each other in the axial direction of the rod 25b. The first passage 26 c is a passage that communicates the hot water supply pipe 22 upstream of the second valve 26 with the first pipe 31 and the second pipe 32 of the local cleaning circuit 30. The second passage 26 d is a passage that communicates the hot water supply pipe 22 upstream of the second valve 65 and the first pipe 31 of the local cleaning circuit 30. The third passage 26 e is a passage that communicates the hot water supply pipe 22 upstream of the second valve 65 and the second pipe 32 of the local cleaning circuit 30. The fourth passage 26 f is a passage that connects the hot water supply pipe 22 upstream of the second valve 26 and the hot water supply pipe 22 downstream of the second valve 26.

  As shown in FIG. 5, the basic structure of the third valve 27 is the same as that of the first valve 25. The third valve 27 includes a valve casing 27a and a rod 27b. The third valve 27 is formed on a pipe and a rod 27b connected to the valve casing 27a. There are different passages. That is, the hot water supply pipe 22 and the drain pipe 51 of the second drain circuit 50 are connected to the valve casing 27a.

  A first passage 27c and a second passage 27d are formed in the rod 27b.

  The first passage 27c and the second passage 27b are separated from each other in the axial direction of the rod 27b. The first passage 27 c is a passage that connects the hot water supply pipe 22 upstream of the third valve 27 and the hot water supply pipe 22 downstream of the third valve 27. The second passage 27 d is a passage that communicates the hot water supply pipe 22 upstream of the third valve 27 and the drain pipe 51 of the second drain circuit 50.

  The third valve 27 is provided with a check valve 29 for taking in air from the outside when the water in the heating toilet seat 1 is drained in the second drainage mode (described later). The check valve 29 is a well-known valve configured to allow air to be taken into the hot water supply pipe 22 without leaking water in the hot water supply pipe 22. The check valve 29 is not connected to the hot water supply pipe 22 in modes other than the second drainage mode.

  As shown in FIG. 1, the local cleaning circuit 30 includes the first pipe 31 and the second pipe 32, the first nozzle 33 provided at the tip of the first pipe 31, and the tip of the second pipe 32. The second nozzle 34 is provided. The first nozzle 33 is, for example, a nozzle for cleaning the buttocks, and the second nozzle 34 is, for example, a bidet nozzle.

  As shown in FIG. 2, the heating toilet seat 1 includes a first cleaning switch 61, a second cleaning switch 62, a temperature sensor 63, a human sensor 64, a first drain switch 71, and a second drain switch. 71. The first cleaning switch 61, the second cleaning switch 62, the temperature sensor 63, the first drain switch 71, the second drain switch 71, and the human sensor 64 are connected to the control device 60.

  The first cleaning switch 61 is a switch for cleaning the buttocks. The second cleaning switch 62 is a bidet cleaning switch. The temperature sensor 63 is a sensor for detecting the temperature of hot water heated by the heater 23. The human sensor 64 can be configured by an infrared sensor or the like having a known structure, and is a sensor that detects whether or not there is a user in the toilet room. The human sensor 64 may be a seating sensor that detects that a user is seated on the toilet seat 10, a sensor that detects that a person has approached the toilet seat 10, or the like. The first drain switch 71 is a switch for draining water in the heating toilet seat 1 in a first drain mode (described later). The second drain switch 72 is a switch for draining water in the heating toilet seat 1 in a second drain mode (described later).

  Based on the operation state of the first cleaning switch 61, the second cleaning switch 62, the first drain switch 71 and the second drain switch 72, and the output signals from the temperature sensor 63 and the human sensor 64, the control device 60 The heater 23, the pump 24, and the first to third valves 25 to 27 are controlled, and the operation mode of the heating toilet seat 1 is the toilet seat heating mode shown in FIG. 6, the nozzle drainage mode shown in FIG. 7, and the first local portion shown in FIG. The cleaning mode, the second local cleaning mode shown in FIG. 9, the first draining mode shown in FIG. 10, and the second draining mode shown in FIG. 11 can be switched to an arbitrary mode. Although not shown, a power on / off switch is also provided.

  The toilet seat heating mode shown in FIG. 6 is an operation mode selected when the user is not detected by the human sensor 64, and the control device 60 turns on the heater 23 and the pump 24. Further, the control device 60 places the first valve 25 in the state shown in FIG. 3B and communicates the hot water supply pipe 22 upstream of the first valve 25 and the hot water supply pipe 22 downstream of the first valve 25. Let This state is a non-drainage state in which discharge of water in the hot water circulation circuit 20 is prohibited. Further, with the second valve 26 in the state shown in FIG. 4D, the hot water supply pipe 22 upstream of the second valve 26 and the hot water supply pipe 22 downstream of the first valve 25 are communicated with each other. With the three valve 27 in the state of FIG. 5A, the hot water supply pipe 22 upstream of the third valve 27 and the hot water supply pipe 22 downstream of the third valve 27 are communicated.

  Thus, the hot water heated by the heater 23 is supplied from the hot water supply pipe 22 to the hot water passage 21 of the toilet seat 10 by the pump 24 and circulates through the hot water passage 21, and then returns to the hot water supply pipe 22 and heated by the heater 23. The pump 24 supplies the hot water passage 21 of the toilet seat 10 from the hot water supply pipe 22. That is, since the toilet seat 10 can be heated by circulating hot water once warmed, energy saving can be achieved. The temperature adjustment of the hot water is performed by the control device 60 controlling the capability of the heater 23 based on the detection result of the temperature sensor 63.

  The nozzle drainage mode shown in FIG. 7 is a mode that is selected when a user is detected by the human sensor 64, and the control device 60 keeps the heater 23 and the pump 24 ON and performs the following operations as follows. 1. The second valve 25, 26 is switched. That is, the control device 60 places the first valve 25 in the state shown in FIG. 3A to allow the water supply pipe 2a to communicate with the hot water supply pipe 22 on the downstream side of the first valve 25, and to turn the second valve 26 on. In the state of FIG. 4A, the hot water supply pipe 22 upstream of the second valve 26 and the first pipe 31 and the second pipe 32 of the local cleaning circuit 30 are communicated.

  Since the water supply pipe 2a is connected to the water supply, water flows into the hot water supply pipe 22 due to the water pressure of the water supply. The water flowing into the hot water supply pipe 22 is heated by the heater 23 and then supplied to the first pipe 31 and the second pipe 32 of the local cleaning circuit 30 through the second valve 26. As a result, old water in the first pipe 31 and the second pipe 32 flows out and becomes clean, and warm water can be supplied in advance to the first nozzle 33 and the second nozzle 34. And the bidet cleaning becomes comfortable.

  The nozzle drainage mode is a mode that is performed only for a predetermined time that is short enough to supply hot water to the first nozzle 33 and the second nozzle 34. When the predetermined time elapses, the mode is switched to the toilet seat heating mode.

  The first local cleaning mode shown in FIG. 8 is an operation mode that is selected when the first cleaning switch 61 is pressed. With the heater 23 turned on and the pump 24 stopped, the first local cleaning mode is as follows. The second valves 25 and 26 are switched. That is, the control device 60 places the first valve 25 in the state shown in FIG. 3A to allow the water supply pipe 2a to communicate with the hot water supply pipe 22 on the downstream side of the first valve 25, and to turn the second valve 26 on. In the state of FIG. 4B, the hot water supply pipe 22 upstream of the second valve 26 and the first pipe 31 of the local cleaning circuit 30 are communicated so that water does not flow through the second pipe 32. . Since the water supply pipe 2a is connected to the water supply, water flows into the hot water supply pipe 22 due to the water pressure of the water supply. The water flowing into the hot water supply pipe 22 is heated by the heater 23 and then supplied to the first pipe 31 of the local cleaning circuit 30 through the second valve 26. As a result, hot water is ejected from the first nozzle 33 and washing can be performed. Since the water pressure of the water supply is used, it is not necessary to operate the pump 24 and energy consumption is small.

  The second local cleaning mode shown in FIG. 9 is an operation mode that is selected when the second cleaning switch 62 is pressed. With the heater 23 turned on and the pump 24 stopped, the first local cleaning mode is as follows. The second valves 25 and 26 are switched. That is, the control device 60 places the first valve 25 in the state shown in FIG. 3A to allow the water supply pipe 2a to communicate with the hot water supply pipe 22 on the downstream side of the first valve 25, and to turn the second valve 26 on. In the state of FIG. 4C, the hot water supply pipe 22 upstream of the second valve 26 and the second pipe 32 of the local cleaning circuit 30 are communicated so that water does not flow through the first pipe 31. . Since the water supply pipe 2a is connected to the water supply, water flows into the hot water supply pipe 22 due to the water pressure of the water supply. The water flowing into the hot water supply pipe 22 is heated by the heater 23, and then supplied to the second pipe 32 of the local cleaning circuit 30 through the second valve 26. As a result, warm water is ejected from the second nozzle 34 to enable bidet cleaning. Since the water pressure of the water supply is used, it is not necessary to operate the pump 24 and energy consumption is small.

  The first drainage mode shown in FIG. 10 is a mode that the control device 60 selects at a predetermined timing when the heating toilet seat 1 is powered on. The predetermined timing may be, for example, every half day or every other day, and the first drainage mode is selected and executed so that the water in the hot water circulation circuit 20 can be kept clean. The timing for executing the first drainage mode may be arbitrarily set by the user. Further, the first drain mode may be selected when the first drain switch 71 is pressed.

  In the first drainage mode, the control device 60 turns off the heater 23 and turns on the pump 24. Further, the control device 60 places the first valve 25 in the state shown in FIG. 3C to allow the water supply pipe 2a to communicate with the hot water supply pipe 22 on the downstream side of the first valve 25. The drain pipe 41 of the drain circuit 40 is communicated. This state is a drained state in which the water in the hot water circulation circuit 20 is discharged. Further, with the second valve 26 in the state shown in FIG. 4D, the hot water supply pipe 22 upstream of the second valve 26 and the hot water supply pipe 22 downstream of the second valve 26 communicate with each other. With the three valve 27 in the state of FIG. 5A, the hot water supply pipe 22 upstream of the third valve 27 and the hot water supply pipe 22 downstream of the third valve 27 are communicated.

  As a result, tap water flows from the hot water supply pipe 22 due to water pressure, and after operating the pump 24 to flow through the hot water passage 21 of the toilet seat 10 and circulate through the hot water passage 21, from the drain pipe 41 of the first drain circuit 40. Drained. After drainage is started from the drainage pipe 41, the first drainage mode is continued until all the old water in the hot water supply pipe 22 and the hot water passage 21 is discharged. The first drainage mode may be continued for a preset time. When ending the first drainage mode, the first valve 25 may be in the state shown in FIG.

  The second drainage mode shown in FIG. 11 is a mode selected by the control device 60 at a predetermined timing so that the water in the hot water circulation circuit 20 can be kept clean. Either the first drainage mode or the second drainage mode may be selected, or both may be selected at different timings. The user may arbitrarily set the timing for executing the second drainage mode. Moreover, you may comprise so that it may be selected when the 2nd drain switch 72 is pushed.

  In the second drainage mode, the control device 60 turns off the heater 23 and turns on the pump 24. Further, the control device 60 places the first valve 25 in the state shown in FIG. 3B and connects the hot water supply pipe 22 upstream of the first valve 25 and the hot water supply pipe 22 downstream of the first valve 25. Further, with the second valve 26 in the state of FIG. 4D, the hot water supply pipe 22 upstream of the second valve 26 and the hot water supply pipe 22 downstream of the second valve 26 are communicated, With the third valve 27 in the state shown in FIG. 5B, the hot water supply pipe 22 upstream of the third valve 27 and the drain pipe 51 of the second drain circuit 50 are communicated. In this state, the check valve 29 and the hot water supply pipe 22 on the downstream side of the check valve 29 are connected.

  Thereby, the water in the hot water supply pipe 22 and the hot water passage 21 is caused to flow into the drain pipe 51 of the second drain circuit 50 by the pump 24 and drained from the drain pipe 51. Since air is taken in from the check valve 29 at this time, drainage is performed smoothly. After drainage is started from the drainage pipe 51, the second drainage mode is continued until all the old water in the hot water supply pipe 22 and the hot water passage 21 is discharged. The second drainage mode may be continued for a preset time. When ending the second drainage mode, the third valve 25 may be brought into the state shown in FIG.

  As described above, according to the heating toilet seat 1 according to the first embodiment, when there is no user, the water supplied from the water supply that is the water supply source 2 is heated by the heater 23 of the hot water supply pipe 22 and heated. The warm water is supplied to the warm water passage 21 of the toilet seat 10 by the pump 24. While the hot water flows through the hot water passage 21, heat is released and the toilet seat 10 is heated.

  When the first valve 25 which is a drainage switching valve is in a non-drainage state in which the first drainage circuit 40 does not drain as shown in FIG. 3B, the hot water flowing through the hot water passage 21 is again supplied with the hot water supply pipe 22. Then, it is supplied to the hot water passage 21 of the toilet seat 10. Since the toilet seat 10 can be heated by circulating hot water once warmed, energy saving can be achieved.

  The warm water circulating in the warm water circulation circuit 20 is drained from the warm water circulation circuit 20 when the first valve 25 is made drainable from the first drain circuit 40 as shown in FIG. Supplied from the upstream side. Thereby, the water in the hot water circulation circuit 20 is kept clean.

  Further, in the first local cleaning mode of FIG. 8 and the second local cleaning mode of FIG. 9, hot water flowing through the hot water circulation circuit 20 maintained clean is supplied to the first cleaning nozzle 33 and the second cleaning nozzle 34. Therefore, the hot water flowing out from the first cleaning nozzle 33 and the second cleaning nozzle 34 is also cleaned.

  Therefore, since the toilet seat 10 can be heated while circulating the hot water generated by the heater 23, energy saving can be achieved. Further, since the first drain circuit 40 is connected to the hot water circulation circuit 20 and the water in the warm water circulation circuit 20 is drained at a predetermined timing, cleanliness can be maintained for a long period of time. The hot water circulation circuit 20 can also be kept clean by draining the water of the hot water circulation circuit 20 from the second drain circuit 50. Since the upstream side of the local cleaning circuit 30 is disposed downstream of the heater 23 in the hot water circulation circuit 20 and upstream of the pump 24, the hot water is supplied by the water pressure of the water supply source without operating the pump 24. Since the first cleaning nozzle 33 and the second cleaning nozzle 34 can be supplied, further energy saving can be achieved.

  Note that the second drain circuit 50 of the first embodiment may be omitted.

(Embodiment 2)
FIG. 12 shows the heated toilet seat 1 according to the second embodiment of the present invention, and FIG. 13 is for explaining the operation of the first valve 25 of the second embodiment. The heating toilet seat 1 according to the second embodiment is different from that according to the first embodiment in that the second drain circuit is omitted, the structure of the first drain circuit 40 is different, and a heat exchanger 80. Since the other parts are the same as those of the first embodiment, the parts different from the first embodiment will be described in detail below.

  The heat exchanger 80 is for exchanging heat between the water discharged from the first drain circuit 40 and the water supplied from the water supply source 2, and the water discharged from the first drain circuit 40 circulates therethrough. A drainage side tube 81 and a water supply side tube 82 through which water supplied from the water supply source 2 circulates are provided. The drain side tube 81 and the water supply side tube 82 are arranged so that the outer surfaces are in contact with or close to each other, and are configured to be able to transfer heat to each other.

  As shown in FIG. 13, a hot water supply pipe 22, a water supply pipe 2 a, and a drain pipe 41 of the first drain circuit 40 are connected to the first valve 25. Similarly to the first embodiment, the rod 25b of the first valve 25 has a first passage 25c for communicating the water supply pipe 2a and the hot water supply pipe 22 downstream of the first valve 25, and an upstream side of the first valve 25. A second passage 25d for communicating the hot water supply pipe 22 on the downstream side with the hot water supply pipe 22 downstream of the first valve 25, and a third passage for communicating the hot water supply pipe 22 on the downstream side of the first water supply pipe 2a and the first valve 25 with each other. A passage 25e and a fourth passage 25f for communicating the hot water supply pipe 22 upstream of the first valve 25 and the first drain pipe 41 are formed.

  The first valve 25 is in the state shown in FIG. 13B when in the toilet seat heating mode, and in the nozzle drainage mode, the first local cleaning mode, and the second local cleaning mode in FIG. 3A. In the first drainage mode, the state shown in FIG. 3C is obtained.

  As shown in FIG. 12, in the first drainage mode, since the first valve 25 is in the state shown in FIG. 3C, tap water flows from the water supply pipe 2a through the water supply side tube 82 of the heat exchanger 80. The hot water circulation circuit 20 flows into the hot water circulation circuit 20 and is drained from the drain pipe 41 of the first drain circuit 40 through the drain side tube 81 of the heat exchanger 80. Since the water drained at this time has a higher temperature than the tap water, the tap water is heated by the heat exchanger 80. Therefore, the energy consumption of the heater 23 is reduced.

  Therefore, in the second embodiment, the same function and effect as in the first embodiment can be achieved. In addition, since the water discharged from the first drain circuit 40 and the water supplied from the water supply source 2 are heat-exchanged by the heat exchanger 80, further energy saving can be achieved.

  Although the second cleaning nozzle 34 for bidet is provided in the first and second embodiments, the present invention is not limited to this, and the second cleaning nozzle 34 may be omitted.

  Moreover, the structure of the 1st-3rd valves 25-27 is not restricted to an above-described structure, The thing of arbitrary structures can be used if the flow path can be switched as mentioned above. .

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the heating toilet seat according to the present invention can be used by being placed on, for example, a Western-style toilet.

1 Heating Toilet Seat 10 Toilet Seat 20 Hot Water Circulation Circuit 21 Hot Water Passage 22 Hot Water Supply Pipe 23 Heater 24 Pump 25 First Valve (Drain Switch Valve)
30 Local cleaning circuit 31 1st piping (hot water piping for local cleaning)
32 2nd piping (hot water piping for local cleaning)
33 First cleaning nozzle 34 Second cleaning nozzle 40 First drain circuit 80 Heat exchanger

Claims (3)

It has a hot water passage (21) formed in the toilet seat (10) and a hot water supply pipe (22) connected to the hot water passage (21), and a water supply source (2 A heater (23) for warming water supplied from the heater (23) to generate hot water, and a pump (24) for supplying the hot water generated by the heater (23) to the hot water passage (21). The hot water generated by the heater (23) is supplied to the hot water passage (21) by the pump (24) and then circulated through the hot water supply pipe (22) again. )When,
Washing nozzles (33, 34) for washing the user's local part of the toilet seat (10), and the warm water circulating circuit (20) connected to the warm water circulation circuit (20), the warm water circulating through the warm water circulation circuit (20) In the heated toilet seat (1) provided with a local cleaning circuit (30) having a hot water pipe (31, 32) for local cleaning for supplying to (33, 34),
A drain circuit (40) for draining water in the warm water circuit (20) is connected to the warm water circuit (20),
The hot water circulation circuit (20) has a drainage switch that can be switched between a drainage state in which water in the hot water circulation circuit (20) is discharged and a non-drainage state in which discharge of water in the hot water circulation circuit (20) is prohibited. Heated toilet seat (1), characterized in that a valve (25) is provided. Heating toilet seat (1) according to claim 1,
The pump (24) of the hot water circulation circuit (20) is provided on the downstream side of the heater (23),
The upstream side of the local washing hot water pipes (31, 32) is disposed downstream of the heater (23) in the hot water circulation circuit (20) and upstream of the pump (24). A heated toilet seat (1). Heating toilet seat (1) according to claim 1 or 2,
A heating toilet seat (1) comprising a heat exchanger (80) for exchanging heat between water discharged from the drain circuit (40) and water supplied from the water supply source (2).

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