JP2009112798A - Toilet seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet seat device capable of sufficiently reducing the influence of a magnetic field (influence of electromagnetic waves) from a toilet seat to a human body even when a toilet seat heater is provided. <P>SOLUTION: The toilet seat device includes a toilet seat 400 including a metal, the toilet seat heater 450 disposed on the back surface 410F of the toilet seat in the state of being electrically insulated to generate heat by a current, a heater driving part for supplying power to the toilet seat heater, and a control part for controlling the heater driving part. The toilet seat heater includes linear heaters 460A and 460B disposed in a bending and meandering state on the back surface 410F. The linear heaters 460A and 460B include heat generating wires 463A and 463B disposed in the state of being electrically insulated from each other and in the state of bending and meandering roughly in parallel to each other. The heat generating wires 463A and 463B are connected to the heater driving part so that the advancing directions of currents flowing to them are roughly opposite to each other when the current is supplied from the heater driving part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a toilet seat device having a toilet seat heater.

  In the conventional toilet seat device, for example, the following configuration has been proposed with the intention of allowing the user to sit on the toilet seat without feeling uncomfortable even when the temperature is low, such as in winter. (For example, refer to Patent Document 1).

  That is, in the conventional toilet seat apparatus described in Patent Document 1, a configuration is proposed in which a linear heater (toilet seat heater) is provided on the back surface of a toilet seat casing formed of magnesium alloy. The linear heater includes a core wire, a heating wire wound around the core wire, and a covering tube that covers the core wire and the heating wire. Further, the linear heater is arranged so as to meander over the entire back surface of the toilet seat casing, and a power supply circuit is connected to both ends of the heating wire.

And in the conventional toilet seat apparatus of patent document 1, when a voltage is applied to a heat generating wire from a power supply circuit, a heat generating wire generates heat, the heat is transmitted to a covering tube, and is further transmitted to a toilet seat casing. It is configured. Thereby, the temperature of a toilet seat casing rises.
JP 2003-310485 A

  However, in the conventional toilet seat device, a magnetic field is generated when a current is passed through a heating wire (conductive wire) provided in a linear heater (toilet seat heater), and the magnetic field is released from the toilet seat surface. . At that time, if the user is seated on the toilet seat, the human body will enter the magnetic field, which has not been improved from the viewpoint of sufficiently reducing the influence of the magnetic field on the human body (the influence of electromagnetic waves). There was room.

  The present invention has been made in view of the above-described problems of the prior art, and even when a toilet seat heater is provided, the influence of the magnetic field from the toilet seat on the human body (effect of electromagnetic waves) can be sufficiently reduced. An object is to provide a toilet seat device.

In order to solve the above-described problems of the prior art, the present invention provides:
A toilet seat that has a seating surface for a user to sit on, and contains metal as a constituent material;
A seat-like toilet seat heater that is disposed on the back surface of the seating surface of the toilet seat in an electrically insulated state with respect to the toilet seat, and generates heat by electric current;
A heater driving unit that generates heat by supplying electric power to the toilet seat heater when the toilet seat needs to be heated;
A control unit for controlling the heater driving unit;
At least,
The toilet seat heater includes a linear heater disposed in a state of bending and meandering on the back surface of the toilet seat,
The linear heater includes two heating wires that are electrically insulated from each other and arranged in a meandering manner substantially parallel to each other,
The two heating wires are connected to the heater driving unit such that when current is supplied from the heater driving unit, the traveling directions of the currents flowing through the two heating lines are substantially opposite to each other,
A toilet seat device is provided.

  With the above-described configuration, in the toilet seat device of the present invention, currents in opposite directions flow through the two heating wires when energized. For this reason, the magnetic field generated by the current flowing in one heating line and the magnetic field generated by the current flowing in the other heating line are in substantially opposite directions, and both cancel each other. Therefore, the magnetic field (electromagnetic wave) generated around the heating wire can be sufficiently prevented.

  As a result, according to the toilet seat device of the present invention, even when a toilet seat heater is provided, the influence of the magnetic field from the toilet seat on the human body (the influence of electromagnetic waves) can be sufficiently reduced.

  In the present invention, two heating wires may be connected to be one. That is, by bending one heating wire at the center thereof, the portions other than the bending point can be in a state where two heating wires are arranged. Even when the two parts are put together, the toilet seat device of the present invention described above can be configured, and the effects of the present invention can be obtained.

  According to the toilet seat device of the present invention, even when a toilet seat heater is provided, the influence of the magnetic field from the toilet seat on the human body (the influence of electromagnetic waves) can be sufficiently reduced.

  Hereinafter, preferred embodiments of the toilet seat device of the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted. Further, the present invention is not limited to the embodiments described below.

<1> Appearance of Toilet Seat Device, Sanitary Washing Device, and Toilet Device FIG. 1 is an external perspective view showing a toilet seat device, a sanitary washing device, and a toilet device according to a preferred embodiment of the present invention.

  As shown in FIG. 1, the toilet apparatus 1000 is installed in a toilet room.

  In the toilet device 1000, the sanitary washing device 100 is attached to the toilet bowl 700. The sanitary washing device 100 includes a main body 200, a remote control device 300, a toilet seat 400, and a lid 500. The toilet seat device 110 is configured by removing the toilet nozzle unit, the nozzle, and the cleaning water supply mechanism, which will be described later, from each component of the sanitary washing device 100.

  As shown in FIG. 1, a toilet seat 400 and a lid 500 are attached to the main body 200 so as to be opened and closed. The main body 200 is provided with a cleaning water supply mechanism (not shown) and a control unit 90 described later.

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

  Further, as shown in FIG. 1, a toilet nozzle 40 is provided at the lower front portion of the main body 200 in a state of protruding inside the toilet 700. The toilet nozzle 40 is connected to the above-described washing water supply mechanism.

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 cleaning water supply mechanism is connected to a nozzle unit (not shown) described later. Accordingly, the cleaning water supply mechanism supplies the cleaning water supplied from the water pipe to the nozzle portion. Thereby, washing water is ejected from the nozzle portion to the user's local area.

  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 (preferred embodiment of toilet seat device)
(2-a) Configuration of Toilet Seat Device FIG. 2 is a schematic diagram illustrating the configuration of the toilet seat device 110. The toilet seat device 110 includes a main body 200, a remote control device 300, a toilet seat 400, and a room entry 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 toilet seat temperature adjustment lamp RA <b> 1, and a seating sensor 610.

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

  Furthermore, the control unit 90 is formed of, for example, a microcomputer, and includes a determination unit that determines the user's entrance and the temperature of the toilet seat 400, a timer unit having a timer function, a storage unit that stores various information, and a heater drive An energization rate switching circuit for controlling the operation of the unit 402 is included.

  The temperature measuring unit 401 of the main body 200 is connected to the thermistor 401 a of the toilet seat 400. Thereby, the temperature measurement part 401 measures the temperature of the toilet seat part 400 based on the signal output from the thermistor 401a. Hereinafter, the temperature of the toilet seat 400 measured by the temperature measuring unit 401 through the thermistor 401a is referred to as a measured temperature value.

  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.

  The 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.

(2-b) Description of Toilet Seat 400 Mounted on the Toilet Seat Device of the Present Embodiment FIG. 3 is an exploded perspective view of the toilet seat 400 mounted on the toilet seat device of the present embodiment.

  FIG. 4 is an exploded plan view showing the upper toilet seat casing 410 and the toilet seat heater 450 of the toilet seat 400 in the toilet seat 400 mounted on the toilet seat device of the present embodiment.

  FIG. 5 is a cross-sectional view showing a detailed structure of the toilet seat heater 450 attached to the upper toilet seat casing 410 of the toilet seat 400 mounted on the toilet seat device of the present embodiment. FIG. 5 is a cross-sectional view showing a cross section when the first toilet seat heater 450A shown in FIG. 6 is cut along a straight line parallel to an axis Y shown in FIG.

  FIG. 6 is a plan view showing a first toilet seat heater 450A arranged on the side closer to the upper toilet seat casing 410 in the toilet seat heater 450 shown in FIG.

  FIG. 7 is a cross-sectional view showing a cross section of the upper toilet seat casing 410 and the first toilet seat heater 450A in the cross-sectional view shown in FIG.

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

  In the following description, based on the direction of the line of sight when the user seated on the toilet seat 400 looks at the front front, the front side of the toilet seat 400 viewed from the seated user is the front of the toilet seat 400, The rear side of the toilet seat 400 viewed from the seated user will be described as the rear portion of the toilet seat 400.

  As shown in FIGS. 3 and 4, 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.

  As shown in FIGS. 4 and 5, the toilet seat heater 450 includes a first toilet seat heater 450 </ b> A disposed on the side close to the back surface 410 </ b> F of the seating surface 410 </ b> U of the upper toilet seat casing 410, and the back surface of the seating surface 410 </ b> U of the upper toilet seat casing 410. The second toilet seat heater 450B disposed on the side far from 410F is overlapped. The first toilet seat heater 450A and the second toilet seat heater 450B have substantially the same size and substantially the same horseshoe shape.

  Further, as shown in FIG. 5, an adhesive layer 452a described later is disposed between the upper toilet seat casing 410 and the first toilet seat heater 450A. The upper toilet seat casing 410 and the first toilet seat heater 450A are adhered by the adhesive layer 452a.

  Further, as shown in FIG. 5, the first toilet seat heater 450A is adjacent to the metal layer 451 disposed adjacent to the adhesive layer 452a (adjacent to the lower side of the adhesive layer 452a), and adjacent to the metal layer 451. The adhesive layer 452b arranged adjacent to the lower side of the metal layer 451 and the thermal conductivity arranged adjacent to the adhesive layer 452b (adjacent to the lower side of the adhesive layer 452b). It has a configuration including a first sheet 492 and a first linear heater 460A disposed in a meandering manner between the metal layer 451 and the adhesive layer 452b.

  Here, the 1st sheet | seat 492 has high heat conductivity compared with the 2nd sheet | seat 493 mentioned later.

  Further, as shown in FIG. 5, the second toilet seat heater 450B is disposed adjacent to the first seat 492 located at the lowermost part of the first toilet seat heater 450A (adjacent to the lower side of the first seat 492). Disposed) the adhesive layer 452c, the second sheet 493 having heat insulation disposed adjacent to the adhesive layer 452c (adjacent to the lower side of the adhesive layer 452c), the adhesive layer 452c and the second The second linear heater 460 </ b> B is disposed in a state of being bent and meandered between the sheet 493 and the sheet 493.

  Here, the second sheet 493 has higher heat insulating properties than the first sheet 492.

  Next, the first linear heater 460A of the first toilet seat heater 450A will be described. As shown in FIG. 6, the first linear heater 460A is adapted to 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 the seat center portion SE3 to the seat other end portion SE2. And bend and meander.

  As shown in FIG. 6, the first linear heater 460 is formed on the upper side in the region from one sheet end SE1 to the other sheet end SE2 toward both sides of the sheet center SE3 and from the sheet center SE3 to the other sheet end SE2. According to the shape of the toilet seat casing 410, it is arranged in a state of meandering in the left-right direction {direction substantially perpendicular to the axis Y shown in FIG. 6}.

  More specifically, the first linear heater 460A is substantially perpendicular to the axis Y shown in FIG. 6 (a direction substantially parallel to the direction of the line of sight when the user seated on the toilet seat 400 looks at the front front). A straight line portion T formed in such a direction and a bent portion K formed in a direction substantially perpendicular to the axis Y shown in FIG. 6 are continuously connected and arranged so as to bend and meander as a whole.

  As shown in FIG. 6, the portion of the first linear heater 460A on the sheet end portion SE1 side and the portion of the first linear heater 460A on the sheet end portion SE2 side have an axis Y shown in FIG. With respect to each other.

  As shown in FIG. 6, the heater start end 460Aa (the inflow end of the current supplied from the heater driving unit 402) of the first linear heater 460A is connected to the lead wire 470A1. Further, the heater end portion 460Ab (current outflow end) of the first linear heater 460A is connected to the lead wire 470A2.

Next, the second linear heater 460B of the second toilet seat heater 450B will be described. The second linear heater 460B has a structure connected to the lead wire 470B1 and the lead wire 470B2 shown in FIG. 4 that is different from the first linear heater 460A, and the traveling direction of the current is substantially abbreviated as the first linear heater 460A. Structures other than those configured to be opposite have substantially the same structure as the first linear heater 460A.

  That is, as shown in FIG. 4, the heater start end 460Ba (the inflow end of the current supplied from the heater drive unit 402) of the second linear heater 460B is connected to the lead wire 470B1. The heater terminal portion 460Bb (current outflow end) of the second linear heater 460B is connected to the lead wire 470B2. That is, in the second linear heater 460B, the end corresponding to the heater terminal portion 460Ab (current outflow end) of the first linear heater 460A is the heater start end portion 460Ba (current inflow end supplied from the heater driving unit 402). The end corresponding to the heater end portion 460Aa (current inflow end) of the first linear heater 460A is the heater end portion 460Bb (current outflow end).

  Further, as shown in FIGS. 4 and 5, the first linear heater 460A and the second linear heater 460B are arranged in a state where they are electrically insulated from each other and are bent and meandered substantially in parallel with each other. Has been. In particular, the first linear heater 460A and the second linear heater 460B of the present embodiment are arranged in a meandering manner so as to run parallel to each other while maintaining a substantially constant distance between the axes. .

  Accordingly, when the current is supplied from the heater driving unit 402, the two heating lines have a traveling direction of the current flowing through the first linear heater 460A and a traveling direction of the current flowing through the second linear heater 460B. It is comprised so that it may become substantially opposite.

  Here, in the present embodiment, the heater drive unit 402 may be configured such that current flows independently through the first linear heater 460A and the second linear heater 460B. In the present embodiment, the heater end portion 460Ab of the first linear heater 460A (current outflow end of the first linear heater 460A) and the heater start end portion 460Ba (second linear heater of the second linear heater 460B). The first linear heater 460A and the second linear heater 460B are used as one linear heater, and the heater driving unit 402 is connected to the single linear heater. It is good also as a structure which supplies an electric current.

  As described above, in this embodiment, when current is supplied from the heater driving unit 402, the traveling direction of the current flowing through the first linear heater 460A and the traveling direction of the current flowing through the second linear heater 460B are substantially the same. By configuring so as to be opposite, the magnetic field generated in the first linear heater 460A and the magnetic field generated in the second linear heater 460B substantially cancel each other as shown in FIG. Thereby, the toilet seat heater 450 as a whole can minimize the influence of the magnetic field (the influence of electromagnetic waves).

  Furthermore, in the present embodiment, the arrangement positions of the first linear heater 460A and the second linear heater 460B are adjusted so that the influence of the magnetic field (the influence of electromagnetic waves) can be minimized as the toilet seat heater 450 as a whole. Yes. That is, the first linear heater 460A and the second linear heater 460B are arranged so as to be substantially parallel so that the direction of current is substantially reversed over the entire region, or the first linear heater 460A and the first linear heater 460A This is to adjust the distance Sab (see FIG. 8) between the axial centers of the two-wire heater 460B.

  Further, as described above, by arranging the first linear heater 460A and the second linear heater 460B to bend and meander, the space of the back surface 410F of the seating surface 410U of the limited toilet seat 400 is effectively utilized. The grounding area of the first linear heater 460A and the second linear heater 460B on the back surface 410 can be sufficiently secured. Thereby, quick heating of the toilet seat 400 and precise temperature management can be performed more reliably.

  In the present embodiment, the first linear heater 460A and the second linear heater 460B have a configuration in which the respective bent portions K are positioned at the inner edge portion and the outer edge portion of the toilet seat heater 450, as shown in FIG. . Thereby, the space | interval between the adjacent bending parts K can be made comparatively short. Therefore, even if the length change caused by the thermal expansion and contraction of the first linear heater 460A and the second linear heater 460B occurs and the linear heater 460 expands and contracts, the bending portion K absorbs the strain due to the expansion and contraction. Be buffered. As a result, the stress caused by the thermal expansion and contraction of the linear heater 460 is reduced, and the occurrence of breakage of the toilet seat heater 450 can be sufficiently suppressed even when used for a long time.

  Further, when the thermal expansion and contraction of the first linear heater 460A and the second linear heater 460B is small, the adhesion of the adhesive layer 452a and the adhesive layer 452b to the metal layer 451 and the like can be maintained well for a long period. Thereby, heating of the toilet seat heater 450 can be performed efficiently and reliably over a long period of time.

  Next, the detailed structure of the upper toilet seat casing 410 of the toilet seat 400 will be described.

  As shown in FIG. 5, the upper toilet seat casing 410 has a configuration mainly including an aluminum plate 413. The aluminum plate 413 is formed with a thickness of 1 mm, for example.

  On the upper surface of the aluminum plate 413, an alumite layer 412 and a surface decorative layer 411 are formed. 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. The coating film 414 also has a function of electrically insulating a metal layer 451 and an aluminum plate 413 described later.

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

  Next, the detailed structure of the toilet seat heater 450 will be described.

  In the present embodiment, a metal layer 451 made of, for example, aluminum is attached to the lower surface of the coating film 414 of the upper toilet seat casing 410 described above via an adhesive layer 452a.

  The film thickness of the metal layer 451 is, for example, 50 μm. The adhesive layer 452a has sufficient adhesion to the metal layer 451 and the coating film 414. The constituent components of the adhesive layer 452a are not particularly limited as long as the adhesive layer 452a has sufficient adhesion to the metal layer 451 and the coating film 414.

  The first linear heater 460A includes an enamel wire 465A including a heat generating wire 463A having a circular cross section and an enamel layer 464A covering the outer peripheral surface of the heat generating wire 463A. Furthermore, the first linear heater 460A has an insulating coating layer 462A that covers the outer peripheral surface of the enameled wire 464A.

  The second linear heater 460B includes an enamel wire 465B including a heating wire 463B having a circular cross section and an enamel layer 464B covering the outer peripheral surface of the heating wire 463B. Furthermore, the first linear heater 460B has an insulating coating layer 462B that covers the outer peripheral surface of the enameled wire 464B.

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

The outer diameters of the first linear heater 460A and the second linear heater 460B are, for example, 0.46 to 0.50 mm. The power density of the first linear heater 460A and the second linear heater 460B is, for example, 0.95 W / cm ² .

  As shown in FIG. 5, the first linear heater 460A is arranged in a meandering manner between the metal layer 451 and the adhesive layer 452b. Furthermore, the 1st sheet | seat 492 which has heat conductivity is arrange | positioned adjacently under the adhesion layer 452b.

  The adhesive layer 452b has sufficient adhesion to the metal layer 451 and the first sheet 492 having high thermal conductivity. The constituent components of the adhesive layer 452b are not particularly limited as long as the adhesive layer 452b has sufficient adhesion to the metal layer 451 and the first sheet 492.

  If the 1st sheet | seat 492 has sufficient thermal conductivity, the structural component will not be specifically limited. In particular, the first sheet 492 has higher thermal conductivity than the second sheet 493 described later. For example, the first sheet 492 may be a layer made of aluminum in the same manner as the first sheet 492. The film thickness of the first sheet 492 may be 50 μm, for example.

  The enamel layer 464A and the enamel layer 464B are made of, for example, polyesterimide (PEI) having heat resistance of 180 to 300 ° C. The film thickness of the enamel layer 464A and the enamel layer 464B is preferably 20 μm or less, and more preferably 12 to 13 μm.

  Such enameled wire 465A and enameled wire 465B have an electrical equipment technical standard of 1000V for 1 minute or more even if the enamel layer 464A and enamel layer 464B are extremely thin film thicknesses of about 0.01 to 0.02 mm. A sufficient electrical withstand voltage performance can be ensured.

  Further, as a material of the enamel layer 464A and the enamel layer 464B, polyimide (PI) or polyamideimide (PAI) may be used.

  Further, as shown in FIG. 5, in the first linear heater 460A and the second linear heater 460B, a single enameled wire 465A and an enameled wire 465B are provided with an insulating coating layer 462A and an insulating coating layer 462B, respectively. Insulating properties (insulating properties of the first linear heater 460A and the second linear heater 460B with respect to the aluminum plate 413) can be obtained more reliably with a heavy insulating structure.

  The insulating coating layer 462A and the insulating coating layer 462B are made of a fluororesin such as a perfluoroalkoxy fluororesin (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.

Here, even if the insulating coating layer 462A and the insulating coating layer 462B are relatively thin, sufficient insulation can be obtained. Therefore, in this embodiment, the first linear heater 460A and the second linear heater 460 are used.
In B, the thickness of the layer containing the synthetic resin as a main component (enamel layer 464A, enamel layer 464B, insulating coating layer 462A and insulating coating layer 462B) is about 0.12 mm, which is extremely thin. In this case, heat conduction from the heating wire 463a to the metal layer 451 and the toilet seat casing 410 can be performed very agile.

  Note that polyimide (PI) or polyamideimide (PAI) may be used as a material for the insulating coating layer 462A and the insulating coating layer 462B.

  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 above example. 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 465A and the enameled wire 465B having excellent heat resistance as in the present embodiment are used as heater wires, the temperature of the toilet seat can be increased in a sufficiently short time, and electrical insulation and safety can be ensured. Therefore, the structure of this embodiment can be effectively used for various toilet seat devices.

  In the structure of this embodiment, the layers containing the synthetic resin as a main component (enamel layer 464A, enamel layer 464B, insulating coating layer 462A and insulating coating layer 462B) are as thin as about 0.1 to 0.4 mm. Can be formed. Thus, the temperature of the toilet seat can be rapidly raised in a state where 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 first linear heater 460A and the second linear heater 460B to the toilet seat casing 410, the first linear heater 460A is provided with a metal layer 451 made of, for example, aluminum. For example, the first sheet 492 having thermal conductivity made of aluminum is sandwiched.

  In addition, a second sheet 493 having heat insulation is disposed outside (on the lower side) of the second linear heater 460B.

  Thereby, the heat of the first linear heater 460A and the second linear heater 460B is sufficiently prevented from escaping outside (downward) the toilet seat heater 450 by the second sheet 493 having heat insulation properties. . The heat of the first linear heater 460A and the second linear heater 460B is efficiently transmitted to the aluminum plate 413 of the upper toilet seat casing 410 by the metal layer 451 and the first sheet 492.

  That is, when an electric current is passed through the toilet seat heater 450, the heat of the second linear heater 460B on the heat-insulating second sheet 493 is less likely to flow to the outside of the second sheet 493 due to the effect of the second sheet 493. The first sheet 492 having conductivity is transmitted to the upper toilet seat casing 410 side. Further, the heat of the first linear heater 460A on the first sheet 492 is also transmitted to the upper toilet seat casing 410 side, so that the two linear heaters 460 (the first linear heater 460A and the second linear heater 460B). It is possible to efficiently transfer the heat to the seating surface 410U and warm the seating surface 410U with less energy.

  In addition, when a current is passed through the toilet seat heater 450, a current in a substantially reverse traveling direction flows through the two linear heaters 460 (the first linear heater 460A and the second linear heater 460B). Magnetic fields generated from the linear heaters 460 (the first linear heater 460A and the second linear heater 460B) are substantially opposite to each other and cancel each other. Therefore, almost no magnetic field is generated around the toilet seat heater 450. Therefore, almost no magnetic field is emitted from the seating surface 410U.

  As the first sheet 492 having thermal conductivity, a sheet made of aluminum is preferable as described above. As the second sheet 493, a closed cell polyethylene sheet is preferably used.

  In addition, the component compositions of the constituent materials of the first sheet 492 and the second sheet 493 may be substantially the same, and the thickness of the first sheet may be smaller (thinner than the thickness of the second sheet). Good). Also in this case, the first sheet 492 can be provided with higher thermal conductivity than the second sheet 493, and the second sheet 493 can be provided with higher heat insulation than the first sheet 492.

  Furthermore, in the present embodiment, the enamel layer (enamel layer 464A and enamel layer 464B) and the insulating coating layer (insulating coating layer 462A and insulating coating layer 462B) can be thinned, so that the linear heater (first linear heater 460A and The outer diameter of the second linear heater 460B) can be reduced (about φ0.2 to φ0.4). In this case, when the metal layer 451 and the first sheet 492 are bonded to each other, the gap between the metal layer 451 and the first sheet 492 can be reduced, and the metal layer 451 and the first sheet 492 can be reduced. Wrinkles can be reduced. Thereby, local high heat of enameled wires (enameled wire 465A and enameled wire 465B) is suppressed, and the layers (enamel layer 464A, enamel layer 464B, insulating coating layer 462A, and insulating coating) contribute to disconnection and electrical insulation of enameled wire 463. Damage to layer 462B) is prevented. As a result, the service life of the toilet seat device 110 can be extended.

  Further, since the enamel wires (enamel wire 465A and enamel wire 465B) can be thinned, 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.

(2-c) Modified Embodiment The toilet seat 400 mounted in the preferred embodiment of the toilet seat device of the present invention has been described above, but the toilet seat mounted in the toilet seat device of the present invention is the toilet seat 400 described above. It is not limited.

  For example, the cross-sectional shape of the heat generation line is not limited to the circular cross section like the heat generation line 463A and the heat generation line 463B illustrated in FIG. For example, the cross-sectional shape of the heating wire may be a rectangular cross-section. When it is set as the cross-sectional shape of this exothermic line, the exothermic line may be a thin film formed by a known thin film manufacturing technique such as physical vapor deposition or chemical vapor deposition.

(2-d) Operation of Toilet Seat Heater 450 Mounted on the Toilet Seat Device of the Present Embodiment Next, the operation of the toilet seat heater 450 will be described.

When a constant voltage is applied to the first linear heater 460A and the second linear heater 460B of the toilet seat heater 450, current flows through the internal heating lines (heating line 463A and heating line 463B), and this heating line ( The heating wire 463A and the heating wire 463B) generate heat. At this time, the generated heat passes from the heating wire (heating wire 463A and heating wire 463B) to the enamel layer (enamel layer 464A and enamel layer 464B), the metal layer 451, and the first seat 493, and the seat of the upper toilet seat casing 410 is seated. Conducted to surface 410U.

  The linear heaters (the first linear heater 460A and the second linear heater 460B) are formed of PFA having an insulating coating layer (the insulating coating layer 462A and the insulating coating layer 462B) having a heat resistance of about 260 ° C. Even if the thickness of the insulating coating layer (insulating coating layer 462A and insulating coating layer 462B) is as thin as 0.1 to 0.15 mm, for example, the heating wire (heating wire 463A and heating wire 463B) rapidly rises to 100 to 150 ° C. It is possible to prevent the enamel layer 463b from being broken even when it is warm. Therefore, the temperature of the seating surface 410U can be rapidly raised by rapidly advancing heat conduction from the linear heaters (the first linear heater 460A and the second linear heater 460B) to the seating surface 410U.

  In this case, it takes 5 to 6 seconds to reach a predetermined optimum temperature from the start of energization to the linear heaters (first linear heater 460A and second linear heater 460B). It takes less than 7 to 8 seconds required to enter the toilet room and sit on the seating surface 410U. 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.

  In addition, the first linear heater 460A is sandwiched between the metal layer 451 and the first sheet 492, and the second linear heater 460B is sandwiched between the first sheet 492 and the second sheet 493. Therefore, heat dispersion is sufficiently performed in the toilet seat heater 450 without variation. Thereby, it can prevent that a linear heater (The 1st linear heater 460A and the 2nd linear heater 460B) heats up. In addition, the seating surface 410U is soaked and the toilet seat heater 450 is prevented from being damaged.

(2-e) Energization sequence of the toilet seat apparatus according to the present embodiment The drive control of the toilet seat heater 450 is performed by largely changing the 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 means 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. 9 is a diagram illustrating a driving example of the toilet seat heater 450 and a change in the surface temperature of the toilet seat 400.

  FIG. 9 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 when driving the toilet seat heater 450 and time. 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 raised with a slightly gentle second temperature gradient.

  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 is lowered 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 this 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, after the user is seated on the toilet seat 400, the surface temperature of the toilet seat 400 is gradually reduced by adjusting the power used to drive the toilet seat heater 450. The user may stop when sitting 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 elapse of a certain time (for example, 1 minute) 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.

(2-f) Effects on Toilet Seat Device 110 In the toilet seat device 110 of the present embodiment, the heating lines (heating line 463A and heating line 463B) of the linear heaters (first linear heater 460A and second linear heater 460B). The heat generated in the above is transmitted to the upper toilet seat casing 410 through the enamel layer (enamel layer 464A and enamel layer 464B) and the insulating coating layer (insulating coating layer 462A and insulating coating layer 462B). Thereby, the temperature of the seating surface 410U rises.

  Here, the enamel layers (enamel layer 464A and enamel layer 464B) have sufficient electrical insulation. Therefore, even if the thickness of the enamel layer (enamel layer 464A and enamel layer 464B) is reduced, the heating wire (heating wire 463A and heating wire 463B) and the upper toilet seat casing 410 can be sufficiently insulated. Accordingly, the thickness of the insulating coating layers (the insulating coating layer 462A and the insulating coating layer 462B) can also be reduced.

  Therefore, in the toilet seat apparatus 110, the enamel layer (enamel layer 464A and enamel layer 464B) and insulation are reliably insulated from the heating wire (heating wire 463A and heating wire 463B) and the aluminum plate 413 of the upper toilet seat casing 410. The thickness of the coating layers (insulating coating layer 462A and insulating coating layer 462B) can be reduced. In this case, since the heat capacities of the enamel layer (enamel layer 464A and enamel layer 464B) and the insulating coating layer (insulating coating layer 462A and insulating coating layer 462B) can be reduced, the heating wires (heating wire 463A and heating wire 463B) It is possible to efficiently transfer the heat generated in step 1 to the seating surface 410U.

  In the toilet seat device 110, an aluminum plate 413 is used for the upper toilet seat casing 410. Therefore, the heat generated by the heating lines (heating line 463A and heating line 463B) can be transmitted to the seating surface 410U more efficiently.

  As a result, it is possible to quickly raise the temperature of the seating surface 410U while reliably insulating the heating lines (heating lines 463A and 463B) and the aluminum plate 413 of the upper toilet seat casing 410.

  In addition, since the heat of the heating lines (heating line 463A and heating line 463B) can be efficiently transmitted to the seating surface 410U, the amount of heat generated by the heating lines (heating line 463A and heating line 463B) can be suppressed. This improves the durability of the enamel layer (enamel layer 464A and enamel layer 464B) and the insulating coating layer (insulating coating layer 462A and insulating coating layer 462B). As a result, the reliability of the toilet seat device 110 is improved.

  Further, an enamel layer (enamel layer 464A and enamel layer 464B) and an insulating coating layer (insulating coating layer 462A and insulation) for insulating the heating wire (heating wire 463A and heating wire 463B) from the aluminum plate 413 of the upper toilet seat casing 410 are provided. Since the thickness of the covering layer 462B) can be reduced, the weight of the toilet seat device 110 can be reduced.

  Further, since the heating wires (heating wire 463A and heating wire 463B) are covered with enamel layers (enamel layer 464A and enamel layer 464B) having sufficient heat resistance, the insulating coating layers (insulating coating layer 462A and insulating coating layer) are covered. A material having low heat resistance can be used as 462B). Thereby, the product cost of the toilet seat apparatus 110 can be reduced reliably.

  Further, when the enamel layer (enamel layer 464A and enamel layer 464B) is formed of polyesterimide or polyamideimide, the polyesterimide and polyamideimide are excellent in electrical insulation and heat resistance. It is possible to quickly raise the temperature of the seating surface 410U while more reliably insulating the heating wire 463B) and the aluminum plate 413 of the upper toilet seat casing 410.

  Further, when the sum of the thickness of the enamel layer (enamel layer 464A and enamel layer 464B) and the thickness of the insulating coating layer 462 is 0.4 mm or less, the heating wire (heating wire 463A and heating wire 463B) and the upper toilet seat casing The temperature of the seating surface 410U can be raised more quickly while reliably insulating the aluminum plate 413 of 410.

  In particular, when the sum of the thickness of the enamel layers (enamel layer 464A and enamel layer 464B) and the thickness of the insulating coating layer 462 is 0.2 mm or less, the temperature of the seating surface 410U can be further increased.

  Further, since the insulating coating layers (insulating coating layer 462A and insulating coating layer 462B) are made of a material having lower heat resistance than the enamel layers (enamel layer 464A and enamel layer 464B), the product cost of the toilet seat apparatus 110 can be sufficiently reduced.

  Further, since the linear heater (first linear heater 460A) is provided so as to be sandwiched between the metal layer 451 provided on the back surface side of the upper toilet seat casing 410 and the first sheet 492, a heating line (heating line) 463A and the heating wire 463B) are efficiently transmitted to the metal layer 451 and the first sheet 492. Further, one surface of the metal layer 451 is attached to the back surface of the upper toilet seat casing 410 and one surface of the first sheet 492 is attached to the other surface of the metal layer 451. Thereby, the heat transmitted from the heating wire 463a to the metal layer 451 and the first sheet 492 can be efficiently transmitted to the entire back surface of the upper toilet seat casing 410. Thereby, the entire seating surface 410U can be heated uniformly.

  In particular, when the metal layer 451 and the first sheet 492 are made of aluminum, the heat generated by the heating lines (heating lines 463A and 463B) can be quickly transmitted by the upper toilet seat casing 410.

  In addition, since the first linear heater 460A and the second linear heater 460B are arranged close to each other, and currents in substantially opposite traveling directions flow through the first linear heater 460A and the second linear heater 460B, The magnetic field generated from the first linear heater 460A and the magnetic field generated from the second linear heater 460B are substantially opposite to each other and cancel each other. Therefore, almost no magnetic field is generated around the toilet seat heater 450. Therefore, almost no magnetic field is emitted from the seating surface 410U.

  Since the toilet seat device of the present invention can suppress the magnetic field emitted from the toilet seat heater, it can also be applied to the use of heaters used for other heating appliances.

1 is an external perspective view showing a toilet seat device, a sanitary washing device, and a toilet device according to a preferred embodiment of the present invention. Schematic diagram showing the configuration of the toilet seat device The exploded perspective view of the toilet seat part 400 mounted in the toilet seat apparatus of this embodiment. The exploded top view which shows the upper toilet seat casing 410 in the toilet seat part 400 mounted in the toilet seat apparatus of this embodiment, and the toilet seat heater 450 of the toilet seat part 400. FIG. Sectional drawing which shows the detailed structure of the toilet seat heater 450 attached to the upper toilet seat casing 410 of the toilet seat part 400 mounted in the toilet seat apparatus of this embodiment. The top view which shows 450 A of 1st toilet seat heaters arrange | positioned in the side close to the upper toilet seat casing 410 among the toilet seat heaters 450 shown in FIG. 5 is a cross-sectional view showing a cross section of the upper toilet seat casing 410 and the first toilet seat heater 450A among the cross-sectional views shown in FIG. Schematic diagram showing the magnetic field generated by the toilet seat heater Time chart showing changes in toilet seat heater surface and toilet seat surface temperature

Explanation of symbols

110 Toilet seat device 400 Toilet seat part (toilet seat)
410U Seating surface 460, 480, 485 Linear heater 463a Heating wire 463b Enamel layer

Claims (2)

A toilet seat that has a seating surface for a user to sit on, and contains metal as a constituent material;
A seat-like toilet seat heater that is disposed on the back surface of the seating surface of the toilet seat in an electrically insulated state with respect to the toilet seat, and generates heat by electric current;
A heater driving unit that generates heat by supplying electric power to the toilet seat heater when the toilet seat needs to be heated;
A control unit for controlling the heater driving unit;
At least,
The toilet seat heater includes a linear heater disposed in a state of bending and meandering on the back surface of the toilet seat,
The linear heater includes two heating wires that are electrically insulated from each other and arranged in a meandering manner substantially parallel to each other,
The two heating wires are connected to the heater driving unit such that when current is supplied from the heater driving unit, the traveling directions of the currents flowing through the two heating lines are substantially opposite to each other,
Toilet seat device.   The toilet seat device according to claim 2, wherein the two heating wires are connected to be one.