JP5012467B2 - Toilet seat device - Google Patents

Description

  The present invention relates to a toilet seat device.

  In the field of sanitary washing devices for washing the local part of the human body, in order to avoid discomfort to the human body, for example, a heating device for adjusting washing water used for washing to an appropriate temperature or a contact portion with the human body. Devices having various functions such as a toilet seat device for adjusting the temperature to an appropriate temperature have been devised. On the other hand, interest in the global environment has increased in recent years, and products that do not consume energy unnecessarily are required. In the sanitary washing device, although the usage time is very small within one day, the usage time cannot be assumed. There is an increasing number of products that stop energizing or maintain at a temperature several degrees lower than the optimum temperature and make the temperature only suitable for use. In this case, it is detected that the timer or the user uses the toilet, and the temperature is raised from the state where power is stopped or the holding state at a temperature several degrees lower to an appropriate temperature. At this time, if the user uses the sanitary washing device before reaching the appropriate temperature, the user is cold and uncomfortable because the temperature is lower than the appropriate temperature.

In the sanitary washing apparatus described in Patent Document 1, a means for notifying the user that the set temperature has been reached is provided to prevent this, and the user is uncomfortable to use without knowing that the user has not been heated to the set temperature. What I think is a sanitary washing device.
JP 2000-257136 A

  By the way, in the notification means as described above, notification is performed when the normal detection means reaches a fixed temperature. If the temperature rise speed is slow and the actual temperature can be detected without delay by a detecting means such as a thermistor, it is possible to notify accurately. However, if the heating speed is high enough to stop energization or raise the temperature from the state held at a temperature several times lower than the appropriate temperature to the appropriate temperature, the response of the detection means such as the thermistor will be delayed, and the detected temperature and actual There was a problem that an error with the temperature of the error occurred and the notification could not be made at an appropriate timing. This error is due to the inherent conditions of the toilet seat parts, the power conditions depending on the installation conditions, the environmental conditions such as the season and room temperature.

  The purpose of the present invention is to appropriately detect when the actual toilet seat surface temperature reaches the set temperature by detecting the use state and use environment that cause this error in advance and correcting the notification time. It is to provide an instant heating toilet seat device that is more comfortable for the user by informing the user.

  In order to solve the above-described conventional problems, a toilet seat device of the present invention includes a toilet seat having a seating surface and a heating element therein, an informing means for notifying that the temperature of the toilet seat has reached a predetermined temperature, and a toilet seat Control means for controlling the toilet seat temperature detection means for detecting the toilet seat temperature of the toilet seat, voltage detection means for detecting the voltage applied to the heating element, current detection means for detecting the current flowing through the heating element, and room temperature detection And at least one detection means among the room temperature detection means for correcting the notification timing of the notification means based on at least one detection data of the detection means.

Thereby, the control means corrects the notification time of the notification means based on the difference between the detection data and the reference value, the influence on the temperature increase of the toilet seat due to the variation of individual toilet seats, the secular change or the difference in use environment, The temperature of the toilet seat at the notification time can be made constant, and a comfortable toilet seat device can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, a comfortable toilet seat apparatus can be provided by grasping | ascertaining a toilet seat surface temperature correctly and alert | reporting the state which can be seated to a user at an appropriate time.

  The first invention includes a toilet seat having a seating surface and having a heating element therein, an informing means for informing that the temperature of the toilet seat has reached a predetermined temperature, and a control means for controlling the toilet seat. A toilet seat temperature detecting means for detecting a toilet seat temperature of the toilet seat, a voltage detecting means for detecting a voltage applied to the heating element, a current detecting means for detecting a current flowing through the heating element, and a room temperature detecting means for detecting a room temperature. At least one detection means, and corrects the notification time of the notification means based on at least one detection data of the detection means.

  As a result, the use of toilet seats is affected by differences in the individual toilet seats, changes over time, the temperature of the toilet seat itself when using the toilet seat and the difference between the standard value and the temperature rise of the toilet seat due to differences in the usage environment such as room temperature. The detection means detects the current situation and usage environment, and the control means corrects the notification time of the notification means based on the difference between the detected data and the reference value, thereby making the temperature of the toilet seat constant at the notification time. This makes it possible to provide a comfortable toilet seat device.

  In the second invention, in particular, in the first invention, the notification time is corrected based on the temperature rise rate of the toilet seat based on the detection data detected by the toilet seat temperature detecting means.

  This makes it possible to increase the temperature of the toilet seat due to differences in resistance values due to individual variations in the heating elements, differences in resistance values due to aging of the heating elements, differences in voltage applied to the heating elements, or differences in room temperature during use, etc. The control means calculates the temperature increase rate of the toilet seat based on the detection data detected by the toilet seat temperature detection means, and the control means corrects the notification time of the notification means based on the difference between the calculated temperature increase speed and the reference value. By doing so, the temperature of the toilet seat at the notification time can be made constant, and a comfortable toilet seat device can be provided.

  According to a third aspect of the invention, in particular, in the first aspect of the invention, the notification time is corrected based on the voltage detected by the voltage detection means.

  As a result, it is possible to accurately grasp the difference between the detection data of the voltage, which is the factor having the greatest influence on the temperature rise of the heating element, and the reference value, and to correct the notification time, thereby obtaining the optimal toilet seat temperature time. It becomes possible.

  According to a fourth aspect of the present invention, in the first aspect of the invention, the toilet seat temperature detected by the toilet seat temperature detecting means, the voltage detected by the voltage detecting means, and the current detected by the current detecting means at the start of energization of the heating element Based on the above, the notification time is corrected.

  As a result, the resistance value of the heating element calculated from the voltage and current detection data, which is the current individual condition of the toilet seat, and the temperature of the toilet seat at the start of energization, as well as the voltage of the environmental conditions where the toilet seat device is installed Thus, it is possible to more accurately correct the notification time of the notification means based on these detection data.

  According to a fifth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the notification time is corrected based on the room temperature detected by the room temperature detecting means.

  As a result, among the factors that affect the temperature rise of the toilet seat, the notification time of the notification means is corrected by the detection data of the room temperature, which is an environmental condition that affects the heat dissipation from the toilet seat, in particular. Is possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
<1> Appearance of Toilet Seat Device, Sanitary Washing Device, and Toilet Device FIG. 1 is an external perspective view showing a toilet seat device and a sanitary washing device provided with the toilet seat device according to the first embodiment of the present invention. The sanitary washing device is installed in the toilet room.

  The sanitary washing device 100 is attached to the upper surface of the toilet bowl 700. The sanitary washing device 100 includes a main body 200, a remote operation device 300, a toilet seat 400 and a lid 500.

  A toilet seat 400 and a lid 500 are attached to the main body 200 so as to be openable and closable. The main body 200 is provided with a cleaning device and a cleaning water supply mechanism (not shown), and a control unit 90 described later is built in the main body 200.

  In FIG. 1, a seating sensor 610 provided in the upper front portion of the main body 200 is shown. The seating sensor 610 is, for example, a reflective infrared sensor. In this case, the seating sensor 610 detects the presence of the user by detecting infrared rays reflected from the human body until the user stands up from the toilet seat 400 from the time when the user approaches to sit on the toilet seat 400.

  In addition, a notification LED 280 is provided on the upper surface of the main body. This notification LED 280 is an informing means for informing the temperature rise state of the toilet seat 400, and starts blinking immediately after the temperature rise of the toilet seat 400 starts. It lights continuously and informs the user of the temperature rise state of the toilet seat 400. The user is also notified when there is an abnormality such as disconnection of the toilet seat heater 450 or the thermistor 401a.

  A room temperature detection sensor 620 for detecting the room temperature of the toilet room is installed on the side surface of the main body.

  Further, FIG. 1 shows a state in which the toilet nozzle 40 of the cleaning device provided in the lower front portion of the main body 200 protrudes inside the toilet 700. The toilet nozzle 40 is connected to the above-described washing water supply mechanism.

  The toilet seat device 110 is configured by components other than the toilet nozzle, the nozzle unit, and the cleaning water supply mechanism from the components of the sanitary cleaning device 100.

  The washing water supply mechanism is connected to a water pipe (not shown). Accordingly, the cleaning water supply mechanism supplies the cleaning water supplied from the water pipe to the toilet nozzle 40. Thereby, washing water is ejected from the toilet nozzle 40 to a wide area on the inner surface of the toilet 700 (toilet bowl pre-washing). Alternatively, washing water is ejected from the toilet nozzle 40 to the back side of the inner surface of the toilet 700 (toilet rear cleaning). Details will be described later.

The washing water supply mechanism is connected to the bottom washing nozzle, the bidet washing nozzle, and the nozzle washing jet outlet of the washing apparatus (not shown) via a switching valve. Accordingly, the cleaning water supply mechanism converts the cleaning water supplied from the water pipe into warm water by the heating means and supplies it to each nozzle. Thereby, a user's local part is washed with the warm water spouted from the butt washing nozzle and the bidet washing nozzle. Further, the cleaning water is ejected from the nozzle cleaning outlet and the butt cleaning nozzle and the bidet cleaning nozzle are self-cleaned.

  The remote operation device 300 is provided with a plurality of switches. The remote control device 300 is attached to a place where a user sitting on the toilet seat 400 can operate, for example.

  The entrance detection sensor 600 is attached to an entrance of a toilet room or the like. The entrance detection sensor 600 is, for example, a reflective infrared sensor. In this case, the entrance detection sensor 600 detects that the user has entered the toilet room when detecting infrared rays reflected from the human body.

  The control unit 90 of the main body 200 controls the operation of each part of the sanitary washing device 100 based on signals transmitted from the remote operation device 300, the room entry detection sensor 600, and the seating sensor 610.

<2> Toilet Seat Device (3-1) Configuration of Toilet Seat Device FIG. 2 is a schematic diagram showing the configuration of the toilet seat device 110. As described above, the toilet seat device 110 includes the main body 200, the remote control device 300, the toilet seat 400, and the entrance detection sensor 600. As shown in FIG. 2, the main body 200 includes a control unit 90, a temperature measurement unit 401, a heater driving unit 402, a notification LED 280, a seating sensor 610, and a room temperature detection sensor 620.

  The toilet seat 400 includes a toilet seat heater 450 and a thermistor 401a.

  The control unit 90 includes, for example, a microcomputer, and includes a voltage detection unit 900 that detects a voltage applied to the toilet seat heater 450, a current detection unit 901 that detects a current flowing through the toilet seat heater 450, a user's entrance, and the temperature of the toilet seat unit 400. Etc., a timing unit having a timer function, a storage unit that stores various information, a calculation unit that compares detected data with a reference value, and an energization rate for controlling the operation of the heater driving unit 402 Including a switching circuit.

  The temperature measuring unit 401 of the main body 200 is connected to the room temperature detection sensor 620 installed in the main body 200 and the thermistor 401 a of the toilet seat 400. Accordingly, the temperature measurement unit 401 measures the room temperature and the temperature of the toilet seat 400 based on the signals output from the room temperature detection sensor 620 and the thermistor 401a. Hereinafter, the room temperature measured by the temperature measuring unit 401 through the room temperature detection sensor 620 and the thermistor 401a and the temperature of the toilet seat 400 are referred to as measured temperature values.

  Further, the heater driving unit 402 of the main body 200 is connected to the toilet seat heater 450 of the toilet seat 400. As a result, the heater driving unit 402 drives the toilet seat heater 450.

  In the present embodiment, toilet seat device 110 operates as follows. At the time of initial setting, the temperature of the toilet seat 400 is adjusted to about 18 ° C., for example, by the control unit 90 controlling the heater driving unit 402. The temperature at this time is referred to as a standby temperature.

  Here, when the user operates the toilet seat temperature adjustment switch 333 of the remote control device 300, the toilet seat set temperature is transmitted to the control unit 90. The control unit 90 stores the toilet seat set temperature received from the remote operation device 300 in the storage unit.

When the user enters the toilet room, the entry detection sensor 600 detects the entry of the user. As a result, a user entry detection signal is transmitted to the control unit 90.

  Next, the operation during normal use will be described. The determination unit of the control unit 90 detects the user's entry into the toilet room based on the entry detection signal from the entry detection sensor 600. Therefore, the determination unit selects a specific heater control pattern related to driving of the toilet seat heater 450 based on the measured temperature value of the toilet seat unit 400 and the toilet seat set temperature stored in the storage unit.

  The energization rate switching circuit controls the operation of the heater driving unit 402 based on the selected heater control pattern and time information obtained by the time measuring unit.

  Accordingly, the toilet seat heater 450 is driven by the heater driving unit 402, and the temperature of the toilet seat 400 is instantaneously increased to the toilet seat set temperature.

  The notification LED 280 starts blinking when the toilet seat heater starts to be driven, and is continuously lit when the temperature of the toilet seat 400 rises above a temperature at which it does not cool even when seated, and the user raises the toilet seat 400. Announce the temperature condition.

(3-2) Configuration of Toilet Seat Part FIG. 3 is an exploded perspective view of the toilet seat part 400. FIG. 5A is a plan view of the toilet seat heater 450 of the toilet seat 400, and FIG. 5B is an enlarged view of a region C72 of FIG. 5A. FIG. 5 is a plan view of the toilet seat 400. 6 is a C73-C73 cross-sectional view of the toilet seat 400 of FIG.

  As shown in FIG. 3, the toilet seat 400 includes a substantially elliptical upper toilet seat casing 410 formed mainly of aluminum, a substantially horseshoe-shaped toilet seat heater 450, and a substantially elliptical lower toilet seat casing 420 formed of synthetic resin. Prepare.

  Hereinafter, the front side viewed from the seated user is defined as the front portion of the toilet seat 400, and the rear side viewed from the seated user is defined as the rear of the toilet seat 400.

  As shown in FIGS. 4A and 5, the toilet seat heater 450 is formed in a substantially horseshoe shape in which a part of the front portion is cut off. The toilet seat heater 450 may have a substantially oval shape. The toilet seat heater 450 includes metal foils 451 and 453 made of, for example, aluminum and a linear heater 460.

  The linear heater 460 is disposed in a meandering manner in accordance with the shape of the upper toilet seat casing 410 in the region from the seat center portion SE3 to the seat one end portion SE1 and in the region from the seat center portion SE3 to the seat other end portion SE2. .

  Specifically, the linear heater 460 is formed to have U-shaped portions of about six rows on the left and right. These U-shaped parts are arranged in parallel substantially along the direction of the thigh of the seated user. The interval between the linear heaters 460 in each U-shaped portion is about 5 mm.

  The heater start end portion 460 a and the heater end portion 460 b of the linear heater 460 are respectively connected to lead wires 470 drawn from one side of the rear portion of the toilet seat 400.

  Further, as shown in FIG. 4B, a plurality of bent portions CU serving as thermal stress buffering portions are provided in the path of the meandering linear heater 460.

As shown in FIG. 6, the distance ds1 of the linear heater 460 in the region G1 along the outer side of the upper toilet seat casing 410 and the linear heater 4 in the region G3 along the inner side.
The interval ds3 of 60 is set smaller than the interval ds2 of the linear heater 460 in the central region G2 of the upper toilet seat casing 410. Thereby, in the area | region G1 along the outer side edge of the upper toilet seat casing 410, and the area | region G3 along the inner side edge, the linear heaters 460 are arranged densely compared with the area | region G2 of a center part.

(3-3) Structure of Toilet Seat Heater FIG. 6 is a cross-sectional view showing the structure of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  As shown in FIG. 6, the upper toilet seat casing 410 is formed of, for example, an aluminum plate 413 having a thickness of 1 mm. An alumite layer 412 and a surface decorative layer 411 are formed on the upper surface of the aluminum plate 413. The upper surface of the surface decorative layer 411 becomes the seating surface 410U. A coating film 414 is formed on the lower surface of the aluminum plate 413. The coating film 414 is a polyester powder coating film having a film thickness of 40 μm and heat resistance of 150 ° C., for example.

  Instead of the aluminum plate 413, one or more of a copper plate, a stainless steel plate, an aluminum plated steel plate, and a zinc aluminum plated steel plate may be used.

  A metal foil 451 made of, for example, aluminum is attached to the lower surface of the coating film 414 via an adhesive layer 452a. The film thickness of the metal foil 451 is, for example, 50 μm.

  The linear heater 460 includes a heating wire 463a having a circular cross section, an enamel layer 463b, and an insulating coating layer 462. The outer peripheral surface of the heating wire 463a having a circular cross section is sequentially covered with the enamel layer 463b and the insulating coating layer 462. The enamel wire 463 is constituted by the heating wire 463a and the enamel layer 463b.

  The heating wire 463a has a diameter of 0.16 to 0.25 mm, for example, and is made of copper or a copper alloy. In the present embodiment, a high tensile strength heater wire made of a 4% Ag—Cu alloy having a diameter of 0.176 mm is used as the heating wire 463a. The resistance value is 0.833 Ω / m.

  The enamel layer 463b is made of, for example, polyesterimide (PEI) having heat resistance of 180 to 300 ° C. The film thickness of the enamel layer 463b is 20 μm or less, and is 12 to 13 μm in the present embodiment. Such an enameled wire 463 sufficiently secures an electrical withstand voltage performance of 1 minute or more at 1000 V, which is an electrical equipment technical standard, even if the enamel layer 463b has a very thin film thickness of about 0.01 to 0.02 mm. be able to. Alternatively, polyimide (PI) or polyamideimide (PAI) may be used as the material for the enamel layer 463b.

  The insulating coating layer 462 is made of a fluororesin such as a perfluoroalkoxy mixture (hereinafter referred to as PFA) having heat resistance of 260 ° C., for example. The thickness of the insulating coating layer 462 is, for example, 0.1 to 0.15 mm. The insulating coating layer 462 made of PFA can be formed by extrusion. In this case, even if the thickness of the insulating coating layer 462 is as thin as 0.05 to 0.1 mm, it is possible to ensure electrical withstand voltage performance that can withstand lightning surge.

  Note that polyimide (PI) or polyamideimide (PAI) may be used as the material of the insulating coating layer 462.

The outer diameter of the linear heater 460 is, for example, 0.46 to 0.50 mm. The power density of the linear heater 460 is, for example, 0.95 W / cm ² .

The linear heater 460 includes an adhesive layer 452b and a metal foil 453 made of, for example, aluminum.
It is attached to the metal foil 451 so as to cover it. The film thickness of the metal foil 453 is, for example, 50 μm.

  In this manner, a double insulation structure can be ensured by forming the insulating coating layer 462 on the single enamel wire 463.

  Further, sufficient insulation can be obtained even if the insulating coating layer 462 is relatively thin. Therefore, the thickness of the insulating coating layer 462 can be reduced. In the present embodiment, the thickness of the resin layer (enamel layer 463b and insulating coating layer 462) of the linear heater 460 is about 0.12 mm, which is extremely thin. In this case, heat conduction from the heating wire 463a to the metal foil 451 and the toilet seat casing 410 can be performed very agile.

  Incidentally, in the conventional toilet seat device, the thickness of the covering tube made of silicone rubber, vinyl chloride or the like of the linear heater is about 1 mm, which is about 10 times that of the present embodiment. The heat conduction rate of such a coated tube was extremely slow, and the temperature raising rate of the toilet seat could not be increased.

  In the conventional toilet seat device, when a large electric power is supplied to the heater wire in order to forcibly increase the temperature raising rate of the toilet seat, the coated tube is melted and burnt out as in the case where the temperature of the heater wire is increased in the heat insulating state. Therefore, raising the temperature of the toilet seat by such a method has not been practical.

  On the other hand, when the enameled wire 463 having excellent heat resistance as in the present embodiment is used as the heater wire, the temperature of the toilet seat can be raised in a sufficiently short time, and electrical insulation and safety can be ensured. Therefore, the structure of the present embodiment can be effectively used for various toilet seat devices.

  In the structure of this embodiment, a resin layer including the enamel layer 463b and the insulating coating layer 462 can be formed with a thin thickness of about 0.1 to 0.4 mm. Thus, the temperature of the toilet seat can be rapidly raised while the absolute temperature of the heating wire 463a and the resin layer is maintained at a low temperature. As a result, a relatively inexpensive insulating material can be used instead of an expensive heat-resistant insulating material.

  In the present embodiment, in order to efficiently transfer the heat of the linear heater 460 to the toilet seat casing 410, the linear heater 460 is sandwiched between aluminum foils 451 and 452. Here, in the linear heater 460 of the present embodiment, since the enamel layer 463b and the insulating coating layer 462 can be thinned, the outer diameter of the linear heater 460 can be reduced (about φ0.2 to φ0.4). In this case, when the aluminum foil 451 and the aluminum foil 452 are bonded together, the air layer between the aluminum foil 451 and the aluminum foil 452 can be reduced, and wrinkles of the aluminum foils 451 and 452 can be reduced. it can. Thereby, the local high heat of the enamel wire 463 is suppressed, and the disconnection of the enamel wire 463 and the damage to the electrical insulating layer (enamel layer 463b and the insulating coating layer 462) are prevented. As a result, the service life of the toilet seat device 110 can be extended.

  Further, since the enamel wire 463 can be made thin, the weight of the toilet seat heater 450 can be reduced, and the toilet seat opening / closing torque can be reduced. Thereby, the electric opening / closing unit for opening and closing the toilet seat can be downsized, and the toilet seat device 110 can be downsized.

(3-4) Operation of Toilet Seat Heater Next, the operation of the toilet seat heater 450 will be described. When a constant voltage is applied between the heater start end portion 460a and the heater end portion 460b of the toilet seat heater 450, a current flows through the internal heating line 463a, and the heating line 463a generates heat. At this time, the generated heat passes from the heating wire 463a through the enamel layer 463b and the metal foils 451 and 453 to the upper toilet seat casing 4.
Conducted to ten seating surfaces 410U.

  In the linear heater 460, since the insulating coating layer 462 is formed of PFA having a heat resistance of about 260 ° C., even if the thickness of the insulating coating layer 462 is as thin as 0.1 to 0.15 mm, for example, the heating wire 463a It is possible to prevent the enamel layer 463b from being destroyed even at a rapid temperature rise to 100 to 150 ° C. Therefore, the temperature of the seating surface 410U can be raised rapidly by rapidly advancing the heat conduction from the linear heater 460 to the seating surface 410U.

  In this case, it takes a short time of 5 to 6 seconds from the start of energization to the linear heater 460, for example, until the user enters the toilet room and sits on the seating surface 410U. It takes less than 7-8 seconds. Therefore, even if the energization detection sensor 600 detects that the user has entered the toilet room and at the same time the energization of the linear heater 460 is started, the seating surface 410U has a sufficiently optimum temperature until the user is seated. Can be reached.

  Further, the inner region G3 and the outer region G1 of the seating surface 410U in FIG. 6 have higher heat dissipation than the central region G2. In the present embodiment, the linear heaters 460 are arranged more densely in the inner region G3 and the outer region G1 than in the central region G2. Therefore, the temperature unevenness and the cold feeling are not felt at the moment when the user is seated on the seating surface 410U.

  On the other hand, the linear heater 460 is as long as about 10 m in total length, and rapidly expands as the heating wire 463a rapidly rises. As a result, the linear heater 460 expands in the length direction. In addition, when the energization is stopped, the temperature of the heating wire 463a is decreased and returns to the original length due to contraction. That is, thermal stress strain due to thermal expansion and contraction is repeatedly formed on the heating wire 463a.

  When the adhesion between the linear heater 460 and the metal foils 451 and 453 is weak, or when a gap is formed between the linear heater 460 and the seating surface 410U, the entire thermal stress strain is at the most easily moved portion of them. concentrate. As a result, a relatively strong bending / extending motion occurs in the linear heater 460, and damage to the linear heater 460 such as breakage of the heating wire 463a occurs due to accumulation of stress fatigue.

  In the present embodiment, since a plurality of bent portions are formed as the thermal stress buffering portion in the linear heater 460, these bent portions finely disperse the entire thermal stress strain, and the bent portions are thermally stressed. Also acts to absorb strain. Therefore, the thermal stress at the bent portion is extremely small, and as a result, only slight bending and stretching occur. As a result, the heating wire 463a is not broken, and the life and durability of the linear heater 460 are improved.

  In addition, in the inner region G3 and the outer region G1 of the seating surface 410U with relatively large heat dissipation, the interval between the linear heaters 460 may be increased and the number of bent portions may be reduced as compared with the central region G2. .

  As described above, the overall length of the linear heater 460 is as long as approximately 10 m, and a bent portion is formed in the linear heater 460. Therefore, it is necessary to maintain and fix the arrangement of the linear heaters 460 when the linear heaters 460 are mounted on the seating surface 410U. A unitized toilet seat heater 450 is configured by closely attaching the linear heater 460 to the metal foils 451 and 453 in a state where the linear heater 460 is sandwiched between the metal foils 451 and 453. Therefore, the linear heater 460 can be bonded to the seating surface 410U in a state where the arrangement of the linear heaters 460 is firmly maintained.

Further, since the linear heater 460 is sandwiched between the metal foils 451 and 453, the metal foils 451 and 453 perform heat distribution evenly. Thereby, it can prevent that the linear heater 460 heats up. In addition, the seating surface 410U is soaked and the toilet seat heater 450 is prevented from being damaged.

(3-5) Energization sequence of toilet seat device The drive control of the toilet seat heater 450 is performed by changing the electric power for driving the toilet seat heater 450 into three.

  For example, when the temperature of the toilet seat 400 is raised with a first temperature gradient, the heater driver 402 in FIG. 2 drives the toilet seat heater 450 with about 1200 W of power (1200 W drive).

  As described above, the resistance value of the toilet seat heater 450 is 0.833 Ω / m, and the total length is 10 m. Therefore, the resistance value of the toilet seat heater 450 is 8.33Ω. When AC 100 V is applied to the toilet seat heater 450 having this resistance value, power of (100 V × 100 V) ÷ 8.33Ω = 1200 W is generated. That is, 1200 W of electric power is generated by passing a current through the toilet seat heater 450 over the entire period of the AC power supply.

  When the temperature of the toilet seat 400 is raised at a second temperature gradient that is slightly gentler than the first temperature gradient, the heater driving unit 402 drives the toilet seat heater 450 with about 600 W of power (600 W drive). Further, when the temperature of the toilet seat 400 is kept constant, the heater driving unit 402 drives the toilet seat heater 450 with about 50 W of power (low power driving). Note that low power driving refers to driving the toilet seat heater 450 with sufficiently low power (for example, power in the range of 0 W to 50 W) compared to 1200 W driving and 600 W driving.

  Switching between 1200 W driving, 600 W driving, and low power driving is performed by the energization rate switching circuit of the control unit 90 controlling energization from the heater driving unit 402 to the toilet seat heater 450.

  An AC current is supplied to the heater driving unit 402 from a power supply circuit (not shown). Therefore, the heater drive unit 402 causes the alternating current supplied based on the energization control signal provided from the energization rate switching circuit to flow through the toilet seat heater 450.

  FIG. 8 is a diagram showing a driving example of the toilet seat heater 450 and a change in the surface temperature of the toilet seat 400.

  FIG. 8 shows a graph showing the relationship between the surface temperature of the toilet seat 400 and time, and a graph showing the relationship between the energization rate and time when the toilet seat heater 450 is driven. The horizontal axis of these two graphs is a common time axis.

  In the present embodiment, it is assumed that the user turns on the heating function in advance and sets the toilet seat set temperature high (38 ° C.).

  When the room temperature is lower than 18 ° C., which is the standby temperature, such as in winter, the control unit 90 adjusts the temperature of the toilet seat 400 to 18 ° C. As described above, the controller 90 controls the toilet seat heater 450 so that the surface temperature of the toilet seat 400 is constant at 18 ° C. during the waiting period D1 until the user's entrance is detected by the entrance detection sensor 600. Low power drive is performed.

When the entry detection sensor 600 detects entry of the user at time t1, the control unit 90 performs 600 W driving during the inrush current reduction period D2. This 600 W drive is performed in order to sufficiently reduce the inrush current. In this case, the surface temperature of the toilet seat 400 is a moderate second.
The temperature gradient is raised.

  Thereafter, the control unit 90 starts 1200W driving of the toilet seat heater 450 at time t2 after the rush current reduction period D2 has elapsed, and continues 1200W driving of the toilet seat heater 450 during the first temperature rising period D3. In this case, the surface temperature of the toilet seat 400 is increased with the first temperature gradient described above.

  Here, the surface temperature of the toilet seat 400 is rapidly increased. The toilet seat heater 450 is driven at 1200 W until the surface temperature of the toilet seat 400 reaches a predetermined temperature (for example, 30 ° C.). Of course, the predetermined temperature may be a temperature set as the heating temperature. However, the predetermined temperature is not a temperature sufficiently increased to the heating temperature, and even when the predetermined temperature is lower than the predetermined temperature, when the user is seated. It may be the lowest limit temperature (limit temperature) that does not cause an unpleasant feeling of being cold. This limit temperature has been found to be about 29 ° C. by subject experiments conducted by the inventors.

  Thus, in the first temperature increase period D3, the surface temperature of the toilet seat 400 is rapidly increased to a predetermined temperature by 1200 W driving. Thus, the user can sit on the toilet seat 400 without feeling that the toilet seat 400 is cold.

  In addition, as described above, when the surface temperature of the toilet seat 400 is rapidly increased, an overshoot occurs in the temperature change. However, in the present embodiment, when the surface temperature of the toilet seat 400 reaches a predetermined temperature, the 1200 W drive of the toilet seat heater 450 is switched to the 600 W drive. Therefore, even when the change in the surface temperature of the toilet seat 400 overshoots, the surface temperature does not exceed the toilet seat set temperature. As a result, the user is prevented from feeling the toilet seat 400 hot when seated.

  Subsequently, the control unit 90 starts 600W driving of the toilet seat heater 450 at time t3 after the elapse of the first temperature rising period D3, and continues 600 W driving of the toilet seat heater 450 during the second temperature rising period D4. To do. In this case, the surface temperature of the toilet seat 400 is raised with the second temperature gradient described above.

  The 600 W drive of the toilet seat heater 450 is performed until the surface temperature of the toilet seat 400 reaches the toilet seat set temperature (38 ° C.).

  The second temperature gradient is gentler than the first temperature gradient. This prevents a large overshoot from occurring in the change in the surface temperature of the toilet seat 400.

  The controller 90 starts low-power driving of the toilet seat heater 450 at time t4 after the elapse of the second temperature rising period D4, and continues low-power driving of the toilet seat heater 450 during the first maintenance period D5. Thereby, the surface temperature of the toilet seat 400 is constant at the toilet seat set temperature.

  When the seating sensor 290 detects that the user is seated on the toilet seat 400 at time t5, the controller 90 reduces the energization rate of the low-power drive, and the surface of the toilet seat 400 during the first seating period D6. The low-power drive of the toilet seat heater 450 is continued so that the temperature maintains the toilet seat set temperature. In the present embodiment, the first seating period D6 is set to about 10 minutes.

  In addition, the control unit 90 further reduces the energization rate of the low power drive at time t6 after the first seating period D6 has elapsed, and the surface temperature of the toilet seat 400 during the second seating period D7 is the toilet seat set temperature. The low-power drive of the toilet seat heater 450 is continued so that the temperature drops to a slightly lower temperature (36 ° C.). In the present embodiment, the second seating period D7 is set to about 2 minutes.

At time t7 after the elapse of the second seating period D7, the control unit 90 further decreases the energization rate of the low power drive, and the surface temperature of the toilet seat 400 is lower than the toilet seat set temperature during the second maintenance period D8. The low-power drive of the toilet seat heater 450 is continued so as to be constant at a slightly low temperature (36 ° C.). In the following description, the surface temperature of the toilet seat 400 that is maintained constant in the second maintenance period D8, that is, a temperature slightly lower than the toilet seat set temperature is referred to as a maintenance temperature.

  Thus, in the present embodiment, after the user is seated on the toilet seat 400, the control unit 90 gradually decreases the surface temperature of the toilet seat 400. This prevents the user from getting burned at low temperatures.

  When it is detected by the seating sensor 290 that the user has left the toilet seat 400 at time t8, the controller 90 stops driving the toilet seat heater 450 during the stop period D9. Thereby, the surface temperature of the toilet seat 400 decreases.

  The controller 90 starts the low-power driving of the toilet seat heater 450 again at time t9 when the surface temperature of the toilet seat 400 reaches 18 ° C., and waits for the surface temperature of the toilet seat 400 to be constant at 18 ° C. The low power driving of the toilet seat heater 450 is maintained during D10.

  Thus, when the temperature gradient becomes gradually gentle, the overshoot caused by the temperature change of the toilet seat 400 can be sufficiently reduced.

  In the present embodiment, the surface temperature of the toilet seat 400 is gradually decreased by adjusting the electric power used to drive the toilet seat heater 450 after the user is seated on the toilet seat 400, but the toilet seat heater 450 is driven. May stop when the user is seated on the toilet seat 400. Even in this case, it is possible to prevent the user from getting burned at a low temperature.

  As described above, in the present embodiment, it has been described that the driving of the toilet seat heater 450 is stopped when it is detected that the user has left the toilet seat 400 at time t8. The stop may be performed after a predetermined time (for example, 1 minute) has elapsed from time t8 when it is detected that the user has left the toilet seat 400. In this case, the surface temperature of the toilet seat 400 does not decrease even when the user once again leaves the toilet seat 400 and again feels comfortable and sits on the toilet seat 400 again. As a result, the user can comfortably sit on the toilet seat 400.

  The energization state of the toilet seat heater 450 during 1200 W drive, 600 W drive, and low power drive will be described together with the energization control signal of the energization rate switching circuit.

  In the following description, the energization rate is the ratio of the time during which an alternating current is passed through the toilet seat heater 450 for one cycle of the alternating current.

  FIG. 9A is a waveform diagram of a current flowing through the toilet seat heater 450 during 1200 W driving, and FIG. 9B is a waveform diagram of an energization control signal supplied from the energization rate switching circuit to the heater driving unit 402 during 1200 W driving.

  As shown in FIG. 9B, the energization control signal at the time of 1200 W driving is always logic “1”. The heater drive unit 402 causes an alternating current supplied from the power supply circuit to flow through the toilet seat heater 450 when the energization control signal is logic “1” (FIG. 9A, bold line portion). Thereby, an alternating current flows through the toilet seat heater 450 over the entire period. As a result, the toilet seat heater 450 is driven with about 1200 W of power.

FIG. 10A is a waveform diagram of current flowing through the toilet seat heater 450 when driven at 600 W, and FIG.
) Is a waveform diagram of an energization control signal supplied from the energization rate switching circuit to the heater drive unit 402 during 600 W drive.

  As shown in FIG. 10B, the energization control signal at the time of 600 W driving is composed of pulses having the same cycle as the alternating current supplied to the heater driving unit 402. The duty ratio of the pulse is set to 50%.

  The heater drive unit 402 causes an alternating current supplied from the power supply circuit to flow in the toilet seat heater 450 when the energization control signal is logic “1” (FIG. 10A, bold line portion). Thereby, an alternating current flows through the toilet seat heater 450 during a half cycle. As a result, the toilet seat heater 450 is driven with about 600 W of electric power.

  FIG. 11A is a waveform diagram of a current flowing through the toilet seat heater 450 during low power driving, and FIG. 11B is a waveform diagram of an energization control signal supplied from the energization rate switching circuit to the heater driving unit 402 during low power driving. .

  As shown in FIG. 11 (b), the energization control signal at the time of low power driving is composed of pulses having the same cycle as the alternating current supplied to the heater driving unit 402. The duty ratio of the pulse is set to be smaller than 50% (for example, about several percent).

  When the energization control signal is logic “1”, the heater drive unit 402 causes an alternating current supplied from the power supply circuit to flow through the toilet seat heater 450 (FIG. 11A, bold line portion). In each cycle, an alternating current flows through the toilet seat heater 450 for a period corresponding to the pulse width. As a result, the toilet seat heater 450 is driven with electric power of about 50 W, for example.

  In addition to the above, when the temperature of the toilet seat 400 is lowered, or when the heating function of the toilet seat device 110 is turned off, the energization rate switching circuit does not give an energization control signal to the heater drive unit 402 (energization control). Set the signal to logic "0"). Thereby, the heater driving unit 402 does not drive the toilet seat heater 450.

  Here, generally, when the current supplied to the electronic device has a harmonic component, noise is generated. In the present embodiment, when 1200 W drive or 600 W drive of the toilet seat heater 450 is performed as described above, the current supplied to the toilet seat heater 450 changes so as to draw a sine curve. Even so, the generation of noise is sufficiently reduced.

  Further, when the toilet seat heater 450 is driven at low power, the current supplied to the toilet seat heater 450 has a harmonic component, but the magnitude of the current is much smaller than that at the time of 1200 W driving and 600 W driving, so Occurrence is sufficiently reduced.

  As described above, in the present embodiment, toilet seat heater 450 is driven by electric power of 1200 W, 600 W, and about 50 W, but toilet seat heater 450 may be driven by other electric power.

  For example, when an alternating current is passed through the toilet seat heater 450 for a period of half a cycle, the timing for flowing the alternating current is set at intervals of a predetermined cycle such as two cycles or three cycles. As a result, the toilet seat heater 450 can be driven with power of a magnitude different from 1200 W, 600 W, and about 50 W while sufficiently preventing the generation of noise.

In the present embodiment, the control unit 90 supplies current to the toilet seat heater 450 when the energization control signal is logic “1”, and supplies current to the toilet seat heater 450 when the energization control signal is logic “0”. Although supply is stopped, supply of current to the toilet seat heater 450 is stopped when the energization control signal is logic “1”, and current is supplied to the toilet seat heater 450 when the energization control signal is logic “0”. May be.

  In addition, since the on / off of the toilet seat heater 450 is controlled by time, the temperature of the toilet seat 400 does not exceed the predetermined value or does not reach the predetermined value when the time measurement is shifted. Therefore, the control unit 90 measures the time during which the toilet seat 400 is turned on using two measurement sources so that the time measurement does not deviate. As one measurement source, the on-time of the toilet seat heater 450 is measured by an oscillator that defines the effective speed of the program of the control unit 90, and another measurement source is used as the measurement source of the toilet seat heater 450 based on the cycle of the AC voltage. Measure the on time. When at least one of these measured values exceeds the specified time, the process proceeds to the next energization pattern.

  In particular, excessive temperature rise is reliably prevented by accurately measuring the time during which 1200 W is energized in the toilet seat. This further improves the safety of the device. Although a method for improving the measurement accuracy by providing a plurality of measurement sources has been described here, it is a method for measuring the time during which the toilet seat heater 450 is fully energized and forcibly interrupting or restricting the energization of the heater. However, the same effect can be obtained.

(3-6) Operation of Notification LED Notification LED 280 as notification means is provided on the upper surface of main body 200. Notification LED 280 starts blinking when energization to toilet seat heater 450 is started, and lights when the temperature of toilet seat 400 reaches the aforementioned limit temperature (29 ° C.). The user is also notified when there is an abnormality such as disconnection of the toilet seat heater 450 or the thermistor 401a.

  The notification LED 280 blinks as the first notification form when the detected temperature (the measured temperature of the thermistor 401a) is lower than the limit temperature, and lights up as the second notification form when the detected temperature is high, and sits on the user. Whether or not the portion 410T feels cold can be determined by looking at the notification LED 280 and can be seated on the toilet seat 400.

  Further, the function of detecting the presence or absence of a human body in the toilet room by the entrance detection sensor 600 stops energization of the toilet seat heater 450 when a certain time (for example, 1 minute) has elapsed since the user left the toilet room, and the notification LED 280 Turns off regardless of the blinking or lit state. Furthermore, even if the fixed time has not elapsed, the stool lid turns off when it closes.

  Further, when disconnection of the toilet seat heater 450 or failure of the thermistor 401a occurs, the user is notified of the abnormality by notifying the notification LED 280 in the third notification form. Unlike the normal flashing (for example, 0.3 second ON, 0.3 second OFF, etc.), the abnormality notification that is the third notification mode is flashing with a fast cycle (for example, 0.1 second ON, 0.1 second). The user is notified that the state is different from the normal state.

  The time when the notification of the notification LED 280 changes from the first notification form to the second notification form is when the temperature of the seating surface 410U of the toilet seat 400 reaches the limit temperature 29 ° C. as described above.

As shown in FIG. 6, there is a difference between the temperature of the seating surface 410U of the toilet seat 400 and the measured temperature value of the thermistor 401a because the measurement surfaces are different. The mounting surface of the thermistor 401a is a metal foil 453 surface facing the seating surface 410U. Further, in order to ensure insulation, the thermistor 401a has an insulating coating. The temperature of the surface 410U cannot be detected. Therefore, when the notification LED 280 which is the second notification form is turned on with the measured temperature value of the thermistor 401a, the correlation between the temperature rise value of the toilet seat 400 and the measured temperature value of the thermistor 401a is measured in advance, and the error in temperature response is calculated. Need to predict.

  FIG. 12 shows the relationship between the temperature of the seating surface 410U of the toilet seat 400 and the measured temperature value of the thermistor 401a.

  For example, when the temperature rise of the thermistor 401a is 10% lower than the temperature rise of the seating surface 410U of the toilet seat 400, the temperature of the thermistor 401a increases while the temperature of the seating surface 410U rises by 11 deg from 18 ° C to 29 ° C. The temperature rise is 9.9 deg. Therefore, the notification LED 280 may be switched from blinking to lighting when the thermistor 401a detects 27.9 ° C.

  Further, a correlation with the arrival time from the thermistor 401a detection temperature to the limit temperature before the start of energization may be measured in advance, and the time until the notification change may be determined by the temperature at the start of energization. For example, if the temperature t0 before energization is 18 ° C., a temperature rise arrival time t1 up to 29 ° C. is 5.5 seconds, and if it is 20 ° C., t1 is 4.5 seconds. To change the notification. This is effective when the detection delay of the thermistor 401a is large.

  However, the correlation between the measured temperature value of the thermistor 401a and the temperature of the seating surface 410U of the toilet seat 400 or the correlation between the temperature at the start of energization and the arrival time depends on the installation environment such as voltage and room temperature, the resistance value of the toilet seat heater 450, etc. It is difficult to take into account individual variations in advance. In this case, since it becomes impossible to notify the user at an appropriate time, it is necessary to correct the use environment and individual differences.

  Here, the variation that needs to be corrected will be described. The temperature rise performance of the toilet seat 400 is largely dependent on voltage. Usually, the voltage of a general household is 100V ± 10%, and in the case of power consumption, since it changes with the square of the voltage, if the voltage fluctuates, it will change by about 20%. Therefore, the temperature rise performance varies by 20%.

  Further, the resistance value of the heater varies about 5% in mass production. Since the electric energy W, the voltage V, and the heater wire resistance R have a relationship of W = V × V / R, if the resistance value R fluctuates by 5%, the temperature rise performance also varies by 5%.

  Further, the temperature raising performance varies depending on the environmental temperature of the installation site. Although the influence is less than the above-described voltage and resistance value, the amount of heat released from the toilet seat 400 varies depending on the environmental temperature, which affects the temperature rise performance.

  Hereinafter, a correction method for the change in the temperature rise performance will be described.

  The first correction method is a method in which the temperature rise rate is calculated based on a change in the measured temperature value of the thermistor 401a immediately after energization, thereby correcting the arrival time. Since this method corrects the change in the temperature rise performance directly based on the rate of temperature rise, variations in voltage and resistance value of the toilet seat heater 400 can be corrected simultaneously.

  FIG. 13 shows the relationship between the measured temperature value of the thermistor due to the difference in temperature rise performance, the surface temperature of the toilet seat, and the notification time. For example, when the temperature rise value per second is 10% higher, the error also increases by about 10%. As described above, when the temperature rise value is 10% higher, the normal temperature error is 1.1 deg. Therefore, a difference of 1.21 deg is generated at 1.1 deg × 110%. Therefore, in this case, the notification may be changed when the thermistor 401a detects 27.79 ° C.

Also, when the fixed time is employed, the fixed time may be changed depending on the temperature rise performance of the thermistor 401a.

  The second correction method is a method in which the voltage detection unit 900 of the control unit 90 detects the voltage and corrects the notification time. FIG. 14 shows the relationship between the toilet seat surface temperature and the notification time when the voltage fluctuates.

  As described above, the variation in the temperature rise performance greatly depends on the voltage of the usage environment. More accurate correction is possible by accurately grasping this voltage. As described above, since the temperature rise value varies in proportion to the square of the voltage fluctuation, the error may be calculated as the square of the voltage fluctuation. At this time, the voltage is preferably detected during 1200 W energization. This is because the voltage drops due to the heater capacity at the time of energization, and an accurate voltage can be obtained by detecting during energization.

  When the above-mentioned time fixing is adopted, the error becomes larger than the notification by the measured temperature value of the thermistor. At this time, it is possible to notify that the toilet seat surface has reached the cold feeling limit more accurately by correcting the voltage.

  In the case of correcting with the temperature increase rate, it is possible to correct the variation in the voltage and the resistance value of the toilet seat heater 450, but it is necessary to grasp the temperature increase rate according to the measured temperature value of the thermistor 401a in a short time, and the variation in the thermistor 401a. And thermistor 401a mounting variation requires complex control, but with the voltage detection means 900, the number of parts is increased, but the system is improved because the voltage that is the largest component of variation can be accurately grasped. To do.

  The third correction method is to reach the limit temperature based on the temperature of the seating surface 410U of the toilet seat 400 at the start of energization, the voltage detected by the voltage detector 900, and the current detected by the current detector 901. In this method, a necessary amount of power is calculated, and notification is made when the calculated specified amount of power is energized.

  For example, when the measured temperature value of the seating surface 410U of the toilet seat 400 at the start of energization is 18 ° C., it is assumed that 5400 W is required to raise the temperature of the toilet seat from 18 ° C. to 29 ° C. The watt is calculated from the detected voltage and current, and the sum is integrated to notify when 5400 W is reached. In this case, in addition to the correction of the voltage at the installation location, it is possible to grasp the resistance value of the heater from the current value, and it is possible to perform the correction taking into account even the solid variation of the heater, which is more accurate than the correction by the temperature rise value of the thermistor 401a. Goes up.

  The fourth correction method is based on the room temperature detected by the room temperature detection sensor 620 installed in the main body 200, and is determined based on the correction value based on the amount of heat released for each room temperature stored in the storage unit of the control unit 90 in advance. Correction is performed. FIG. 15 shows the relationship between the measured temperature value of the thermistor, the surface temperature of the toilet seat, and the notification time when the room temperature fluctuates.

  For example, when the room temperature is 15 ° C. and the toilet seat 400 is kept at 18 ° C., if the error is 10%, the thermistor 401a detection temperature is changed to 27.9 ° C. and the notification is changed. When the room temperature is 5 ° C., the heat radiation of the toilet seat 400 is large and the error is reduced. For example, when the error is 8%, the error is 0.88 deg and the notification may be changed at 28.12 ° C.

  In the above embodiment, the case where the notification time is the limit temperature has been described, but this may be a set temperature or a temperature equivalent thereto.

  Further, the accuracy of the correction method can be further improved by combining a plurality of the first correction method to the fourth correction method.

Although the present invention has been described with reference to correction of the notification time, it can also be used as a means for accurately grasping the temperature reached to the set temperature, for example, normal temperature control. That is, it may be used as the energization change time instead of the notification time change. The energization control is changed from 1200 W to 600 W or about 50 W phase control depending on the toilet seat surface temperature, and can also be used to correct the change timing. By correcting, it is possible to accurately grasp that the toilet seat surface temperature has reached 38 ° C., so that the comfort is increased.

  As described above, the temperature rise rate of the toilet seat surface temperature is fast and a response delay occurs in the thermistor 401a as the detection means. Therefore, even if the toilet seat surface temperature reaches the set temperature, the detection means detects a temperature lower than the set temperature. ing. This error varies depending on the voltage of the installation environment, the room temperature, and the variation of the resistance value of the toilet seat heater, similarly to the notification time. Therefore, by making corrections similar to the notification time, the reached temperature can be accurately grasped, and a more comfortable toilet seat can be obtained.

  In particular, at the set temperature, when the response delay is larger than the delay assumed in advance, the toilet seat surface temperature reaches a temperature higher than the set temperature. In this case, comfort and safety can be further improved by performing correction.

  Further, when the temperature raising performance is high, the performance can be satisfied even if the energization time is short. Therefore, when the voltage is high or the resistance value of the heater is low, the energization time as a product can be suppressed. In other words, by performing the correction, it is possible to accurately perform control such that the energization is shortened when the heater line temperature is high and the energization is long when the heater line temperature is low. Reduced.

  Since the toilet seat apparatus of this invention can alert | report suitably the toilet seat temperature rising state heated up instantaneously, it can be applied also to the other heating apparatus heated up instantaneously.

1 is an external perspective view showing a toilet seat device and a sanitary washing device including the same according to Embodiment 1 of the present invention. The schematic diagram which shows the structure of the toilet seat apparatus in Embodiment 1 of this invention. The exploded perspective view of the toilet seat part in Embodiment 1 of this invention (A) is a top view of the toilet seat heater of a toilet seat part, (b) is an enlarged plan view of the area | region of (a). The top view of the toilet seat part in Embodiment 1 of this invention C73-C73 sectional drawing of the toilet seat part of FIG. Sectional drawing which shows the structure of the toilet seat heater attached to an upper toilet seat casing Time chart showing toilet seat heater drive and toilet seat surface temperature change (A) is a waveform diagram of the current flowing through the toilet seat heater during 1200 W drive, and (b) is a waveform diagram of an energization control signal applied from the energization rate switching circuit to the heater drive unit during 1200 W drive. (A) is a waveform diagram of the current flowing through the toilet seat heater during 600 W drive, and (b) is a waveform diagram of an energization control signal applied from the energization rate switching circuit to the heater drive unit during 600 W drive. (A) is a waveform diagram of the current flowing through the toilet seat heater during low power driving, and (b) is a waveform diagram of an energization control signal applied from the energization rate switching circuit to the heater driving unit during low power driving. A graph showing the relationship between the surface temperature of the toilet seat and the measured temperature value of the thermistor A graph showing the relationship between the measured temperature value of the thermistor, the surface temperature of the toilet seat, and the notification time due to the difference in temperature rise performance Graph showing the relationship between toilet seat surface temperature and notification time when the voltage fluctuates A graph showing the relationship between the measured temperature value of the thermistor, the surface temperature of the toilet seat, and the notification time when the room temperature fluctuates

Explanation of symbols

90 Control unit (control means)
110 Toilet seat device 280 Notification LED (notification means)
400 Toilet seat (toilet seat)
401a Thermistor (toilet seat temperature detection means)
410U Seating surface 450 Toilet seat heater (heating element)
620 Room temperature detection means 900 Voltage detection means
901 Current detection means

Claims (5)

A toilet seat having a seating surface and having a heating element therein; a notification means for notifying that the temperature of the toilet seat has reached a predetermined temperature; and a control means for controlling the toilet seat, wherein the toilet seat temperature of the toilet seat At least one of detecting means for detecting the temperature of the toilet seat, voltage detecting means for detecting the voltage applied to the heating element, current detecting means for detecting the current flowing through the heating element, and room temperature detecting means for detecting the room temperature. A toilet seat device that corrects the notification time of the notification means based on at least one detection data of the detection means. The toilet seat device according to claim 1, wherein the notification timing is corrected based on a temperature increase rate of the toilet seat based on detection data detected by the toilet seat temperature detection means. The toilet seat device according to claim 1, wherein the notification time is corrected based on the voltage detected by the voltage detection means. The notification timing is corrected based on the toilet seat temperature detected by the toilet seat temperature detecting means, the voltage detected by the voltage detecting means, and the current detected by the current detecting means at the start of energization of the heating element. Toilet seat device. The toilet seat device according to any one of claims 1 to 4, wherein the notification time is corrected based on the room temperature detected by the room temperature detecting means.