JP2010075497A - Toilet seat device and bidet apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide toilet seat heating where temperature on a sitting surface of a toilet seat is raised in an extremely short time and also provides a user with safe heating of the toilet seat even when a fault occurs. <P>SOLUTION: Both surfaces of a metallic foil unit 454 are held between first waterproof insulating foil 455a and second waterproof insulating foil 455b, so as to constitute a toilet seat heater where water is prevented from invading from an external part and insulation property is reinforced. A heat-transfer promotion body 496 made of a heat conduction paste material 496a is arranged between the first metal foil 453 and the first waterproof insulating foil 455a in a tight area 460c, so as to stick a thermosensitive part 470a. Thus, unnecessary heat transfer from the tight area 460c to the sitting surface 410U is suppressed, thereby concentrating the heat transfer to the thermosensitive part 470a. Consequently, the temperature of the sitting surface 410U is prevented from being excessively raised. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a toilet seat device provided with an overtemperature prevention device and a sanitary washing device using the toilet seat device.

  In the conventional toilet seat device of this type, as shown in FIG. 18, the temperature of the toilet seat is raised to a predetermined temperature by the heating means 2 on the back surface of the metal toilet seat 1 to save energy (for example, see Patent Document 1). ). In other words, in this type of heated toilet seat, the heating means 2 has to be brought to a proper temperature quickly in a short period of time until it is energized and seated immediately before the user sits on the toilet seat to save power. Toilet seat 1 is used.

Therefore, in the case of a heated toilet seat in which the buttocks are placed directly and the temperature rises in a short time, when there is a situation in which energization to the toilet seat continues without stopping even at a predetermined set temperature due to some abnormality, it is relatively short. It is also conceivable that the user may feel uncomfortable over the appropriate temperature in time, and the user needs to stand up from the toilet seat.
JP 2003-79539 A

  As described above, the conventional configuration has a problem that the temperature of the toilet seat 1 may increase due to an abnormal situation.

  In view of the problems of the prior art, the problem to be solved by the present invention is to detect the temperature increase of the toilet seat quickly even when some abnormal situation occurs and the temperature control of the toilet seat becomes impossible. An object of the present invention is to provide a toilet seat device that can prevent over-rise and thereby provide a safe toilet seat device and a sanitary washing device using it.

  In order to solve the above-mentioned problems, a toilet seat device according to the present invention includes a toilet seat having a seating surface and containing a metal material, a toilet seat heater adhered to the back side of the seating surface, and an overtemperature preventing device including a heat sensitive part. The toilet seat heater holds a linear heating element having part of a densely-patterned nectar region portion, and the linear heating element is provided with a first waterproof insulating foil and a second waterproof insulation. A heat transfer promoting body is provided between the linear heating element and the first waterproof insulating foil in the dense region portion, and the overheat prevention device is provided on the first waterproof insulating foil. The heat sensitive part is closely attached.

  The toilet seat device according to the present invention can constitute a toilet seat heater which has a linear heating element sandwiched between the first and second waterproof insulating foils, thereby preventing water from entering from the outside and enhancing the insulation. A heat transfer promoting body is provided between the linear heating element and the first waterproof insulating foil, and the heat sensitive part of the overheat prevention device is closely attached to the first waterproof insulating foil. Heat can be transferred to the heat transfer facilitator without waste, and can be conducted to the heat sensitive part via the first waterproof insulation foil. Thus, it is possible to provide a toilet seat device that can ensure both electrical safety such as ensuring insulation and thermal safety such as preventing high temperature of the seating surface.

A first invention comprises a toilet seat having a seating surface and containing a metal material, a toilet seat heater adhered to the back side of the seating surface, and an overtemperature preventing device having a heat sensitive part, wherein the toilet seat heater comprises: While holding a linear heating element partly having a densely-patterned honey region part, the linear heating element is configured to be sandwiched between a first waterproof insulating foil and a second waterproof insulating foil, A heat transfer accelerator is provided between the linear heating element and the first waterproof insulating foil in the dense region, and the heat sensitive part of the overheat prevention device is adhered to the first waterproof insulating foil. It is.

  Accordingly, it is possible to configure a toilet seat heater that prevents water from entering from outside and prevents moisture from coming into contact with the linear heating element to enhance insulation.

  And, in the dense region portion, a heat transfer promoting body is provided between the linear heating element and the waterproof insulating foil, and the heat sensitive portion of the overheat prevention device is further adhered to the waterproof insulating foil, thereby Heat generation can be transferred to the heat transfer accelerator without waste, and at the same time, heat can be conducted to the heat sensitive part through the waterproof insulating foil.

  Therefore, it is possible to promptly detect an overtemperature of the seating surface caused by some abnormal situation, and thus provide a toilet seat device that can ensure both electrical safety such as ensuring insulation and thermal safety such as preventing high temperature of the seating surface. can do.

  According to a second aspect of the invention, particularly in the first aspect of the invention, the toilet seat heater holds a predetermined arrangement pattern by sandwiching a linear heating element between the first metal foil and the second metal foil. The first metal foil and the second metal foil are sandwiched between the first waterproof insulation foil and the second waterproof insulation foil, respectively, and water is immersed at the boundary between the first waterproof insulation foil and the second waterproof insulation foil. It has been prevented.

  Accordingly, the linear heating element is sandwiched between the first metal foil and the second metal foil and the predetermined arrangement pattern is held, so that the heat generated from the linear heating element is reduced to the first and second. The metal foil can be uniformly diffused.

  And by sandwiching the first and second metal foils with the first and second waterproof insulating foils respectively, preventing water from entering the boundary between the first waterproof insulating foil and the second waterproof insulating foil The first and second metal foils and the linear heating element can be reliably prevented from coming into contact with moisture.

  In this way, it is possible to realize a safe seat-type toilet seat heater that can maintain a uniform heat diffusion state and that prevents inundation from the outside to ensure insulation.

  3rd invention is 1st or 2nd invention especially in 1st or 2nd invention, 1st waterproof insulation foil and 2nd waterproof insulation foil are polyester-type resin foils, such as polyethylene terephthalate, polyesterimide, polyamideimide, and polyimide, Any one of them is used.

  Thereby, selection according to the actual highest use temperature of a linear heating element is possible. For example, polyethylene terephthalate (PET) can be selected up to about 180 ° C., polyester imide (PEI) can be selected at about 200 ° C., and polyamide imide (PAI) or polyimide (PI) can be selected at about 250 ° C.

  In a fourth aspect of the invention, in particular, in any one of the first to third aspects of the invention, the heat transfer promoting body is constituted by a filling portion of a heat conductive paste material.

  As a result, the heat-sensitive paste of the overheat prevention device is filled between the linear heating element and the first waterproof insulating foil as a heat transfer accelerator without any gaps in the dense region. The close contact state can be realized according to the shape of the part, and it can correspond to various shapes of the heat sensitive part.

  Furthermore, the close contact state between the dense region portion and the heat sensitive portion is such that the heat conductive paste material undergoes a certain degree of thermal expansion due to the heat generated in the dense region portion, so that the close contact state between the dense region portion and the heat sensitive portion is further improved. Can promote heat transfer to.

  According to a fifth invention, in any one of the first to fourth inventions, the heat transfer promoting body includes a Cu molded body.

  As a result, the heat transfer promoting body includes a Cu molded body that is a metal with high thermal conductivity, so heat generated from the dense region is efficiently absorbed by the heat transfer promoting body, and the temperature rises. Since heat is transferred from the waterproof insulating foil to the heat sensitive part, unnecessary heat transfer to the seating surface can be suppressed and heat transfer to the heat sensitive part can be concentrated.

  In a sixth aspect of the invention, in any one of the first to fifth aspects of the invention, the heat transfer promoting body is composed of a filling portion of a heat conductive paste material and a Cu plate, and the Cu plate is adhered to the waterproof insulating foil. Is.

  As a result, the heat transfer promoting body conducts heat generated from the dense region portion directly to the Cu plate through the first heat quantity that conducts heat directly to the Cu plate and the heat conduction paste material filled without voids. As a result, the entire Cu plate has an effect of efficiently raising the temperature, and heat is transferred from the first waterproof insulating foil to the heat-sensitive part, so that heat transfer to the heat-sensitive part can be concentrated.

  In addition, since the Cu plate can be easily formed by punching from a flat plate material, a coil material, etc., if the shape of the heat sensitive part that is in contact with the first waterproof insulating foil is, for example, a flat plate shape, the drawing process is completely performed. Use which is not necessary is possible, and a heat transfer promoter with high versatility can be obtained at low cost.

  According to a seventh aspect of the invention, in particular, in any one of the first to sixth aspects of the invention, the heat transfer promoting body is constituted entirely or mostly by a Cu molded body, and a part of the Cu molded body has a dense region portion. This is approximately matched to the uneven shape.

  As a result, the whole or most of the heat transfer promoting body is made of Cu, which is a metal with high thermal conductivity, and at the same time, by expanding the contact area between a part of the Cu molded body and the uneven shape of the dense region portion The heat generated from the dense area is absorbed quickly and efficiently by the Cu molded body, and is further transferred from the first waterproof insulating foil to the heat sensitive part, thus suppressing unnecessary heat transfer to the seating surface. Heat transfer to the part can be centralized.

  According to an eighth aspect of the invention, in particular, in any one of the first to seventh aspects, the dense area portion is provided in an area where a user is usually not frequently seated.

  At this time, the heat generation in the dense region portion is transferred to the heat sensitive portion of the overheat prevention device, and the temperature rise at the corresponding seating surface portion becomes dull, or the heat sensitive portion and the dense region portion It is conceivable that the contact is insufficient and the temperature of the corresponding seating surface is increased.

  For this reason, by positioning the dense region portion at the left and right end portions in the vicinity of the outer peripheral portion behind the toilet seat heater, for example, at a position far away from the seat portion that reliably contacts the user's thigh, buttocks, etc. When the user is seated, a safe and comfortable feeling of use can be provided without feeling uncomfortable in the temperature distribution of the toilet seat.

  In a ninth aspect of the invention, in particular, in any one of the first to eighth aspects of the invention, the overheat prevention device uses a thermostat.

  As a result, when the temperature of the seating surface rises, it is possible to quickly shut off the energization by the thermostat and to stop the device safely, thereby ensuring the safety of the user.

  A tenth aspect of the invention includes, in particular, the toilet seat device according to any one of the first to ninth aspects and a main body.

  Thereby, the abnormal temperature rise which arose on the seating surface can be detected and blocked by the temperature rise prevention device with a fast response speed, and a safe and comfortable sanitary washing device can be provided.

  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 is a sectional view of a schematic configuration of a toilet seat apparatus according to Embodiment 1 of the present invention, FIG. 2 is a front view of a toilet seat heater used in the toilet seat apparatus, FIG. 3 is an exploded perspective view of the entire toilet seat, and FIG. FIG. 5 is a partially enlarged view of the dotted line area (a) in FIG. 2, FIG. 6 is a partially enlarged sectional view of the same linear heating element, and FIG. 7 is another linear heating element. FIG. 8 is a conceptual diagram of a control block of the toilet seat device, FIG. 9 is a front view of a toilet seat heater equipped with the same temperature rise prevention device, and FIG. 10 is a perspective view of the temperature rise prevention device. 11 is a perspective view of the locking device of the overheat prevention device, FIG. 12 is a partial enlarged cross-sectional view of the mounting portion of the overtemperature prevention device, and FIG. 13 is a view of the first and second waterproof insulation foils. FIG. 14 is a partial enlarged cross-sectional view showing a configuration example of the boundary portion, and FIG.

  The configuration, operation, and action of the toilet seat device according to Embodiment 1 of the present invention will be described with reference to the above drawings.

  1 to 4, a toilet seat 400 includes a toilet seat base 420 made of a synthetic resin, a seating surface 410U formed of a metal having high thermal conductivity such as aluminum, and a toilet seat between the toilet seat base 420 and the seating surface 410U. In the configuration in which the heater 450 is interposed, the toilet seat heater 450 is fixed by adhering an adhesive layer (not shown) to a fixed position on the inner surface of the seating surface 410U. The toilet seat heater 450 is equipped with a thermistor 401a for adjusting the temperature of the normal seating surface 410U.

  Further, the toilet seat heater 450 has a linear heating element 460 wired in a fixed pattern, and a part of the pattern is an overtemperature preventing device 470 made of a thermostat having a bimetal switch (not shown) inside. This is a dense region portion 460c in which a portion of the linear heating element 460 wired in a predetermined pattern is in close contact with the heat sensitive portion 470a (FIG. 12) to concentrate heat on the heat sensitive portion 470a.

  On the other hand, the controller 90 has a signal input 600a from the human body detection sensor 600 (FIG. 8), a seating signal input 610a, an output from the thermistor 401a, and a toilet seat heater 450 via an overtemperature prevention device 470 therebetween. Are connected.

  As shown in FIGS. 2 and 5, the linear heating element 460 is disposed in a meandering shape that meanders in the left-right direction in accordance with the shape of the seating surface 410 </ b> U of the toilet seat 400. The linear heating element 460 is arranged so that the meandering bent portion is positioned in the vicinity of the outer side and the inner side of the seating surface. Specifically, one continuous linear heating element 460 is divided into a first series A linear heating element 460a and a second series B linear heating element 460b, and both are arranged substantially in parallel. Has been.

  In this arrangement, since the line interval between the bent portions is short, the change in the line length of the linear heating element 460 due to thermal expansion and contraction becomes small, and the thermal stress due to thermal expansion and contraction is buffered at the bent portion. In this configuration, disconnection is suppressed. 2 can be arbitrarily adjusted, and the heating distribution of the toilet seat heater 450 can be adjusted accordingly.

  For example, the lengths La and Lb of the bent portions and the spacing S between the bent portions are adjusted so that the heating density in the vicinity of the outer side and the inner side of the toilet seat heater 450 is higher than the heating density in the central portion of the toilet seat heater 450. In addition, a uniform heating temperature can be maintained in almost the entire region of the toilet seat heater 450. Further, in this example, the current direction in the first series A linear heating element 460a is opposite to the current direction in the first series B linear heating element 460b, and therefore both the linear heating elements 460a. The magnetic field generated from 460b tends to be canceled, and as a result, generation of noise and the like is suppressed.

  2, 12 and 13A and 13B, the seating surface 410U is formed of, for example, an aluminum plate 413 having a thickness of 1 mm. On the upper and lower surfaces of the aluminum plate 413, an upper surface coating film 411 and a lower surface coating film 412 made of polyester resin having heat resistance of about 150 to 180 ° C. are formed with a thickness of about 0.05 to 0.2 mm. The dough is not exposed. In addition to the aluminum plate 413, any one or a combination of a copper plate, a stainless steel plate, an aluminum-plated steel plate, and a zinc-aluminum-plated steel plate may be used for the seating surface 410U.

  On the other hand, a toilet seat heater 450 is attached to the lower surface coating film 412 side of the seating surface 410U. The toilet seat heater 450 includes the linear heating element 460 sandwiched between the adhesive layer (not shown) side of the first metal foil 453 and the non-adhesive layer side of the second metal foil 451, and the meandering shape described above. An array is retained. As the first metal foil 453 and the second metal foil 451, for example, an aluminum foil having a relatively high thermal conductivity and a thickness of 0.05 mm is used. In addition, the first metal foil 453 and the second metal foil 451 have a higher thermal conductivity such as a copper foil. When a metal material is used, the heating performance as the toilet seat heater 450 increases.

  In addition, the toilet seat heater 450 is a sheet in which a linear heating element 460 is sandwiched between an adhesive layer side (not shown) of the first metal foil 453 and a non-adhesive layer side of the second metal foil 451. A mold metal foil unit 454 is formed. Furthermore, the first waterproof insulating foil 455a having a size larger than that of the metal foil unit 454, that is, the first metal foil 453 and the second metal foil 451 (5 to 10 mm in this example), It is sandwiched between waterproof insulating foils 455b.

  Specifically, the adhesive layer side (not shown) of the first waterproof insulating foil 455a is adhered to the first metal foil 453 side, and the adhesive layer side (not shown) of the second metal foil 451 is adhered. The non-adhesive layer side of the second waterproof insulating foil 455b is adhered, and both sides of the metal foil unit 454 are sandwiched, and the adhesive layer side (not shown) of the second waterproof insulating foil 455b is attached to the seating surface 410U. The toilet seat heater 450 has a sheet-type configuration with the lower surface coating film 412 side attached.

  In addition, the adhesion part of the adhesion layer side of the 1st waterproof insulation foil 455a and the non-adhesion layer side of the 2nd waterproof insulation foil 455b is the area | region of 5-10 mm circumference which is a dimension part larger than the metal foil unit 454 And a boundary portion 458 for preventing water from entering the first metal foil 453, the second metal foil 451, and the linear heating element 460 from the outside.

  As the boundary portion 458, first, as shown in FIG. 13A, the bonding portion between the adhesive layer side of the first waterproof insulating foil 455a and the non-adhesive layer side of the second waterproof insulating foil 455b The method of using the portion 458a is relatively simple.

  Further, as shown in FIG. 13 (b), the first waterproof insulating foil 455a is entirely or partially larger than the second waterproof insulating foil 455b, and the protruding portion is the second waterproof insulating foil. There is a method of forming the boundary portion 458b by folding back to the 455b side. In this case, the workability of the boundary portion 458b is complicated, but the effect of preventing flooding is to be reinforced in the case of sticking to the seating surface 410U or the sticking to a portion with many curved surfaces. Is possible.

  Moreover, as a material used for the first waterproof insulating foil 455a and the second waterproof insulating foil 455b, for example, polyethylene terephthalate (PET), which is relatively versatile among polyester resins, is used. The thicknesses of the first waterproof insulating foil 455a and the second waterproof insulating foil 455b are 0.012 to 0 in order to secure the softness for firmly holding the metal foil unit 454 and the waterproof insulating property. The range of .05 mm is sufficient, and in this example, the optimum value is 0.025 mm.

  The material of the first waterproof insulating foil 455a and the second waterproof insulating foil 455b can be selected from materials having higher heat resistance among polyester resins depending on the operating temperature range and allowable cost of the linear heating element. It is. For example, polyesterimide (PEI) can be selected at about 200 ° C., and polyamideimide (PAI) or polyimide (PI) can be selected at about 250 ° C.

  The linear heating element 460 shown in FIG. 6 includes a heating wire 463a having a substantially circular cross section, an enamel layer 463b as a first insulating coating layer, and a second insulating coating layer 462. The outer peripheral surface of the heating wire 463a having a substantially circular cross section is covered in turn with an enamel layer 463b and then a second insulating coating layer 462. The heating wire 463a on which the enamel layer 463b is formed is generally called an enamel wire 463.

  The heating wire 463a is made of, for example, copper or a copper alloy having a diameter of 0.16 to 0.25 mm. In this example, a high tensile strength heater wire made of a 4% Ag—Cu alloy having a diameter of 0.168 mm is used as the heating wire 463a. Incidentally, a resistance value of 0.88 Ω / m is used.

  The enamel layer 463b is made of, for example, polyesterimide (PEI) having heat resistance of about 200 ° C. The film thickness of the enamel layer 463b is 0.02 mm or less, and is 0.01 to 0.016 mm in this example. Such an enamel 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 when the film thickness of the enamel layer 463b is about 0.01 to 0.02 mm. be able to. Further, as other material of the enamel layer 463b, if polyimide (PI) or polyamideimide (PAI) is used, the heat resistance can be further increased to about 250 ° C.

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

  Therefore, a linear heating element 460 is obtained in which a double insulating coating layer such as an enamel layer 463b and a thin PFA layer 462 is formed on the heating wire 463a. The outer diameter can be kept in the range of 0.3 to 0.5 mm. In this example, the outer diameter is set to about 0.35 mm to ensure the withstand voltage, and from the heating wire 463a to the second metal foil 451, the second Through the waterproof insulating foil 455b, heat conduction to the seating surface 410U can be extremely agile.

  Thus, when the enameled wire 463 having excellent heat resistance is used as a heater wire, the temperature of the seating surface 410U can be raised in a sufficiently short time, and electrical insulation and safety can be secured, so that it can be applied to various toilet seat devices. Is possible.

  FIG. 7 shows another configuration example of the linear heating element 460 in which a plurality of enamel wires 463 are twisted, and each enamel wire 463 is formed as a first insulating coating on a heating wire 463a having a diameter of 0.09 mm. An enamel layer 463b having a thickness of 0.01 mm is formed.

  Further, a double insulation structure is similarly secured by forming a PFA layer 462 as a second insulation coating layer so as to surround a bundle of a plurality of enamel wires 463. In FIG. 7, seven enamel wires 463 are twisted together, but the number of enamel wires 463 is not limited to seven.

  In this configuration, by forming a bundle in which a plurality of enamel wires 463 are twisted together, thermal stress due to thermal expansion and contraction can be dispersed throughout the wire bundle, so that a situation such as disconnection can be suppressed. Further, by making at least one of the wire bundles a non-insulated electric wire without the enamel layer 463b, even when the enamel layer 463b of any enamel wire 463 is broken down due to local high heat or the like, the breakdown is quickly performed. Thus, it is possible to safely cut off the power supply to the heating wire 463a.

  A toilet seat device 110 shown in FIG. 8 includes a main body 200, a remote control device 300, a toilet seat 400, and a human body detection sensor 600. The main body 200 includes a control unit 90, a temperature measuring unit 401, a heater driving unit 402, a toilet seat temperature adjustment lamp RA1, and a seating sensor 610. The toilet seat 400 includes a toilet seat heater 450, an overtemperature prevention device 470, and a thermistor 401a.

  The control unit 90 is composed of, for example, a microcomputer, and determines the user's entrance and the temperature of the toilet seat 400, a timer function, storage of various information, and switching of energization rate for controlling the operation of the heater driving unit 402. It has the function of.

  The temperature measuring unit 401 is connected to the thermistor 401 a and measures the temperature of the toilet seat 400 based on a signal output from the thermistor 401 a, and the heater driving unit 402 is connected to the toilet seat heater 450 and drives the toilet seat heater 450.

  In this example, as a normal use state, at the time of initial setting, the control unit 90 controls the heater driving unit 402 so that the toilet seat 400 is temperature-adjusted to, for example, about 18 ° C. as a standby temperature. The controller 90 detects the user's entry into the toilet room based on the entry detection signal from the human body detection sensor 600. Next, the control unit 90 selects a predetermined heater control pattern based on the measured temperature value of the toilet seat 400 and the toilet seat set temperature, and the toilet seat heater 450 is driven by the heater driving unit 402, so that the temperature of the toilet seat 400 becomes the set temperature. It is heated instantly. Therefore, comfortable use is possible without feeling cold when the user sits on the toilet seat 400.

  In addition, if an abnormality occurs in the control unit 90 or the like, the energization of the toilet seat heater 450 does not stop and the temperature of the toilet seat 400 exceeds the set temperature, the overtemperature prevention device 470 is activated. Thus, thermal safety for the user can be ensured, and the toilet seat temperature can be suppressed.

Next, in FIGS. 2 and 9 to 12, the dense region portion 460 c where the linear heating elements 460 meander at a high density is positioned in a region where the user is usually seated very little so that the toilet seat heater 450 is positioned. It is configured in the vicinity of the outer peripheral portion on one side rear. The dense region portion 460c is provided with an overheat prevention device 470 made of a thermostat incorporating a bimetal switch (not shown).

  At this time, the heat generated in the dense region 460c is transferred to the heat sensitive part 470a of the overheat prevention device 470, and the temperature rise at the corresponding seating surface 410U becomes dull, or the heat sensitive part 470a There may be a case where the close contact with the dense region 460c is insufficient and the temperature of the corresponding seating surface 410U is excessively increased.

  Therefore, the user is seated by positioning the dense region portion 460c at a location far away from the site of the seating surface 410U that reliably contacts the user's thighs, buttocks, or in the vicinity of the outer periphery at one side rear of the toilet seat heater 450. It is possible to give a safe and comfortable feeling of use without feeling uncomfortable in the temperature distribution of the toilet seat.

  Here, the thermostat has a return type and a non-reset type. When the return type is used, it is desirable to separately install a non-reset type overheat prevention device in the energization path to which the thermostat is connected. In this example, the thermostat has a configuration in which a return type is used as an example, and a thermal fuse (not shown) is installed in the toilet seat heater 450 as a non-reset type. In the overheat prevention device 470, the heat sensitive portion 470a (FIGS. 11 and 12) is made of a metal having good thermal conductivity such as substantially canned aluminum. The heat-sensitive part 470a is fitted with a fixing flange 470b made of aluminum or the like so as to surround the periphery of the heat-sensitive part 470a, and the heat-sensitive part 470a and the fixing flange 470b are brought into close contact with the dense region 460c.

  The heat-sensitive portion 470a and the dense region portion 460c are two cylinders provided in the locking device 480 while sandwiching the dense region portion 460c between the locking device 480 provided on the seating surface 410U side and the fixing flange 470b. After aligning the protruding portion 480a in the shape with the corresponding positioning hole of the fixing flange 470b, the end of the protruding portion 480a can be crimped and fitted to ensure a close contact state.

  At this time, with respect to the dense region portion 460c, the interval between the adjacent linear heating elements 460 is denser than that of the other wiring pattern portions, so the first metal foil 453 and the first waterproof insulating foil 455a There may be gaps between In this example, in order to prevent the gap between the first metal foil 453 and the first waterproof insulating foil 455a in the entire dense region 460c, the corresponding first metal foil 453 and the first waterproof The following heat transfer facilitator 496 was formed between the insulating foil 455a.

  The heat transfer accelerator 496 is filled with a heat conductive paste material 496a made of silicon-based heat conductive grease having a thermal conductivity of 0.8 to 1.0 W / m · K. In addition, a heat conductive paste material 496a is supplementarily applied around the contact portion between the heat sensitive portion 470a and the first waterproof insulating foil 455a. Presence / absence is within the discretion. The heat conductive paste material 496a is not limited to silicon, and zinc oxide or the like can be used.

  Therefore, in the dense region portion 460c in this configuration, the linear heating element 460 has the heat sensitivity of the overheat prevention device 470 through the first metal foil 453, the heat conductive paste material 496a, and the first waterproof insulating foil 455a. The part 470a can be brought into close contact regardless of the surface shape. Therefore, the dense region portion 460c can be provided with a flexibility that can ensure a contact state corresponding to the surface shape of the heat-sensitive portion 470a, and a good contact state that does not generate voids can be realized accordingly. .

In this example, aluminum or an aluminum alloy is used as the material of the heat-sensitive portion 470a and the fixing flange 470b. However, a metal having higher thermal conductivity such as Cu or Cu alloy may be used. However, as a precaution in that case, it is also assumed that water is mixed into the toilet seat 400. Therefore, from the viewpoint of preventing galvanic corrosion that is likely to occur at the contact portion of different metals, the heat sensitive portion 470a, the fixing flange 470b, and the locking The tool 480 is preferably made of substantially the same material or a material with a relatively close ionization tendency.

  In general, the toilet seat 400 is seated with its skin in direct contact with the seating surface 410U, and therefore sufficient consideration is necessary for safety. It can be used safely and comfortably in normal use. However, if a malfunction occurs in the control unit 90 and others due to some abnormal situation, and energization control to the toilet seat heater 450 becomes impossible, an immediate safety device must be activated. It is. The overheat prevention device 470 in this example operates as described below.

  FIG. 14 is a result of measuring the detected temperature of the overheat prevention device 470 and the surface temperature of the seating surface 410U when the linear heating element 460 is energized on the assumption that the control unit 90 has failed. In FIG. 14, curves A and A ′ are the surface temperature of the seating surface 410 </ b> U, and curves B and B ′ are the detected temperatures of the overheating device 470.

  When energization of the linear heating element 460 is started, the surface temperature of the seating surface 410U reaches the toilet seat maximum set temperature T1 at time t1. Normally, energization is stopped by a command from the control unit 90 when T1 is reached, but energization may continue if some abnormal situation occurs. When the OFF operation temperature of the over-temperature prevention device 470 is set to T3, the surface temperature of the seating surface 410U is equal to or higher than the toilet seat maximum set temperature T1, and reaches T2 where it can be reliably determined that the temperature is abnormally high. Then, the bimetal switch inside the overheat prevention device 470 reverses to cut off the energization to the linear heating element 460. At this time, the temperature of the seating surface 410U and the overheat prevention device 470 continues to overheat for (t2-t1) seconds due to the thermal diffusion action on the seating surface 410U.

  Here, it is very difficult to set the OFF operation temperature of the overheat prevention device 470 to the crossing 0 in consideration of manufacturing and cost, and the tolerance is generally set to ± 2 ° C. . That is, when the tolerance is taken into consideration, the OFF operation temperature of the overheat prevention device 470 is (T3) to (T3 + 4). If the OFF operating temperature is (T3 + 4), the curves of the temperature of the seating surface 410U and the detected temperature of the overheat prevention device 470 are A ′ and B ′, and the overheat prevention device 470 operates at time t3 and is energized. Circuit is interrupted. In this case, the overheating is continued for (t3-t1) seconds.

  That is, in consideration of the variation in the OFF operation temperature of the overheat prevention device 470, the time for overheating is the shortest (t2-t1) seconds and the longest (t3-t1) seconds. In consideration of safety, the circuit must be shut off as quickly as possible when the temperature rises excessively. Therefore, the time (t3-t1) can be shortened by increasing the slope of the curve B, that is, by increasing the temperature response speed of the overheat prevention device 470, and the temperature of the seating surface 410U is excessively increased. Before, the energization circuit to the linear heating element 460 can be cut off, and can be used safely and safely even in the unlikely event.

  As described above, in this example, the first waterproof insulation foil 455a and the second waterproof insulation 455b sandwich both surfaces of the metal foil unit 454 of the toilet seat heater 450 to prevent water from entering from the outside. Therefore, the toilet seat heater 450 with enhanced insulation can be configured. However, in the normal configuration, the distance between the heat-sensitive portion 470a and the dense region portion 460c of the overtemperature prevention device 470 is increased, and the overtemperature prevention device 470 is increased. Temperature response delay may occur.

Even in such a case, the linear heating element 460 in the dense region 460c has the heat conductive paste material 496a as the heat transfer facilitator 496 between the first metal foil 453 and the first waterproof insulating foil 455a. Filled without gaps and completely contacted with the surface shape of the heat sensitive part 470a of the overheat prevention device 470 through the first waterproof insulating foil 455a, so that the generation of voids is suppressed and the heat sensitive part 470a Can be achieved.

  Further, due to the heat generation of the dense region portion 460c, the thermal conductive paste material 496a undergoes a certain thermal expansion, so that the close contact state between the dense region portion 460c and the heat sensitive portion 470a is further improved, and unnecessary heat is applied to the seating surface 410U. While suppressing the movement, the heat transfer to the heat sensitive part 470a can be promoted. Therefore, without causing a temperature response delay of the over-temperature prevention device 470, it is possible to quickly detect an over-temperature caused by some abnormality and cut off the energization of the toilet seat heater 450.

  In this way, it is possible to provide the toilet seat device 110 that can ensure both electrical safety, such as ensuring insulation, and thermal safety, such as prevention of high temperature of the seating surface 410U, even in situations such as flooding from the outside.

(Embodiment 2)
FIG. 15 is a partially enlarged cross-sectional view of the mounting portion of the overheat prevention device for the toilet seat device according to Embodiment 2 of the present invention. The configuration, operation, and action of the toilet seat device according to Embodiment 2 of the present invention will be described with reference to the above drawings.

  In the present embodiment shown in FIG. 15, the difference from the first embodiment is that the following heat transfer promoting body 497 is configured between the first metal foil 453 and the first waterproof insulating foil 455a. .

  The heat transfer promoting body 497 is filled with the heat conductive paste material 497a between the first metal foil 453 and the first waterproof insulating foil 455a, and is close to the heat sensitive area of the heat sensitive portion 470a of the overheat prevention device 470. A Cu plate 499a is provided as a Cu molded body 499 having a high thermal conductivity.

  Incidentally, the appropriate thickness of the Cu plate 499a is about 0.1 to 0.5 mm, but 0.3 mm is used in this example from the viewpoint of preventing deformation. In this example, the Cu plate 499a has a general flat plate shape according to the shape of the heat sensitive portion 470a. However, the Cu plate 497b can be drawn according to other shapes of the heat sensitive portion 470a. . Note that the same reference numerals as those in the first embodiment denote the same components, and a description thereof will be omitted.

  As an effect of the heat transfer promoting body 497, the heat generated from the dense region 460c is thermally conducted from the first metal foil 453 directly to the Cu plate 499a and to the Cu plate 499a via the heat conductive paste material 497a. Due to the amount of heat generated, the entire Cu plate 499a efficiently rises in temperature, and at the same time, heat is transferred from the first waterproof insulating foil 455a to the heat sensitive part 470a, thereby suppressing unnecessary heat transfer to the seating surface 410U and the heat sensitive part. The heat transfer can be concentrated to 470a, and the temperature rise caused by some abnormality can be detected quickly to cut off the energization.

  Here, since the Cu plate 499a can be easily formed by punching from a flat plate, if the shape of the heat-sensitive portion 470a that is in contact via the first waterproof insulating foil 455b is substantially a flat plate shape, it is familiar at a low cost. A good heat transfer promoting body 497 configuration can be realized.

  Therefore, similarly, it is possible to ensure both electrical safety, such as ensuring insulation, and thermal safety, such as prevention of high temperature of the seating surface, even in situations such as flooding. Furthermore, even if the heat-sensitive portion 470a is made of aluminum, the first waterproof insulating foil is interposed between the Cu plate 499a and the heat-sensitive portion 470a. Does not occur.

(Embodiment 3)
FIG. 16 is a partially enlarged cross-sectional view of the mounting portion of the overheat prevention device for the toilet seat device according to Embodiment 3 of the present invention. The configuration, operation, and action of the toilet seat device according to Embodiment 3 of the present invention will be described using the above drawings.

  In the present embodiment shown in FIG. 16, the difference from the first and second embodiments is that the following heat transfer promoting body 498 is configured between the first metal foil 453 and the first waterproof insulating foil 455a. By the way.

  The heat transfer facilitator 498 is formed between the first metal foil 453 and the first waterproof insulating foil 455a so that the surface on the dense region portion 460c side is substantially the uneven shape of the first metal foil 453 in the dense region portion 460c. The contact area of the first waterproof insulating foil side 455a is increased by matching, and a Cu molded body 499b in which the surface of the heat sensitive portion 470a of the overheat prevention device 470 is made correspond to the first waterproof insulating foil. 455a.

  Note that the Cu molded body 499b only needs to have a minimum thickness corresponding to the uneven shape of the first metal foil 453 and the surface shape of the heat-sensitive portion 470a. Therefore, the thickness of the entire Cu molded body 499b may be about 1 to 1.5 mm. The same reference numerals as those in the first and second embodiments indicate the same configuration, and the description thereof is omitted.

  As an action of the heat transfer promoting body 498, the heat generated from the dense region 460c is uniformly and efficiently absorbed by the Cu molded body 499b that is in almost full contact with the first metal foil 453, and the temperature rises. Since heat is transferred from the waterproof insulating foil 455a to the heat sensitive part 470a, unnecessary heat transfer to the seating surface 410U can be suppressed and heat transfer can be concentrated on the heat sensitive part 470a. Therefore, it is possible to quickly detect an overtemperature caused by some abnormal situation and cut off the energization.

  Accordingly, similarly, it is possible to ensure both electrical safety such as ensuring insulation and thermal safety such as preventing the seating surface from becoming hot even in situations such as flooding.

(Embodiment 4)
FIG. 17: is an external appearance perspective view which shows the sanitary washing apparatus in Embodiment 4 of this invention, and is provided with any one among the toilet seat apparatuses shown in Embodiment 1-3.

  A sanitary washing device 900 installed in the toilet room shown in FIG. 17 is attached to the upper surface of the toilet bowl 700. The sanitary washing device 800 includes the main body 200, the remote control device 300, the toilet seat 400, and the lid 500.

  The toilet seat 400 includes any one of the toilet seat devices shown in the first to third embodiments, and the toilet seat 400 and the lid portion 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 800 that enters and exits the toilet bowl 700 and a cleaning water supply mechanism (not shown), and a control unit 90 is built therein. In addition, the thing of the same code | symbol as Embodiment 1, 2, 3 shows the same structure, and abbreviate | omits description.

  When the user enters the toilet room, the human body detection sensor 600 (for example, a reflective infrared sensor) detects the infrared light reflected from the human body and detects the user's room entry. At that time, as described in the first embodiment, the seating surface 410U of the toilet seat 400 rapidly rises to a temperature at which the user does not feel cold, for example, within 6 seconds.

  Next, when the user is seated on the seating surface 410U, a seating sensor 610 (for example, a reflective infrared sensor) provided on the front upper portion of the main body 200 detects infrared rays reflected from the human body, and thereby the toilet seat 400 is placed on the toilet seat 400. Detecting the presence of the user, the seating surface 410U is held at an appropriate temperature that allows comfortable seating.

  When the user operates the remote control device 300 after the stool is finished and sends a cleaning instruction as a signal to the main body 200, the cleaning device 800 directly connected to the cleaning water supply mechanism connected to the water pipe (not shown). Protrudes and washing water (arrow) spouts from the vicinity of the tip to wash the user's local area.

  Further, when the user operates the remote control device 300 after the cleaning is completed and sends a cleaning stop signal to the main body 200, the cleaning device 900 is accommodated in the main body 200. Finally, the user stands up from the seating surface 410U and leaves the toilet room.

  The above is an outline of the operation during normal use. When the user is seated on the seating surface 410U, the abnormality of the control unit 90 as described in the first embodiment occurs, and the energization to the toilet seat heater 450 is constant. In the case of continuing without stopping at the set temperature, the overheat prevention device 470, the dense region portion 460c of the toilet seat heater 450, the first metal foil 453 and the first waterproof insulating foil are provided. The heat transfer promoting body 496, or the heat transfer promoting body 497, or the heat transfer promoting body 498, the heat transfer promoting action to the heat sensitive part 470a causes the overheat prevention device 470 to act quickly and energize the toilet seat heater 450. The thermal safety for the user can be secured.

  Further, even if water is generated inside the toilet seat 400 during the user's stool process, the toilet seat heater 450, that is, the first metal foil 453, the second metal foil 451, and the linear heating element 460, A sanitary washing device that can prevent contact with moisture and can simultaneously ensure and maintain electrical insulation and thermal safety can be obtained.

  As described above, the toilet seat device according to the present invention is a toilet seat heater that has enhanced insulation properties by preventing water from entering from the outside. Electrical safety such as ensuring insulation and thermal safety such as preventing high temperature of the seating surface. Therefore, the present invention can be applied not only to the toilet seat device but also as a general-purpose safety mechanism technology for heating equipment that is premised on the user's contact.

Sectional drawing of schematic structure of the toilet seat apparatus in Embodiment 1 of this invention The front view of the toilet seat heater of the toilet seat apparatus in Embodiment 1 The exploded perspective view of the whole toilet seat of the toilet seat apparatus in Embodiment 1 The state figure which stuck the toilet seat heater of the toilet seat apparatus in Embodiment 1 on the seating surface Partial enlarged view of dotted line area (a) in FIG. The partial expanded sectional view of the linear heating element of the toilet seat heater in the toilet seat apparatus of Embodiment 1 The partial expanded sectional view of the other example of the linear heating element of the toilet seat heater in the toilet seat apparatus of Embodiment 1 The conceptual diagram of the control block of the toilet seat apparatus in Embodiment 1 The front view of the toilet seat heater which equipped the toilet seat heater in the toilet seat apparatus of the same Embodiment 1 with the overheat prevention device The perspective view of the excessive temperature rise prevention apparatus of the toilet seat heater in the toilet seat apparatus of Embodiment 1 The perspective view of the locking tool of the overheat prevention device of the toilet seat heater in the toilet seat apparatus of Embodiment 1 The expanded sectional view of the mounting part of the overheat prevention device of the toilet seat heater in the toilet seat apparatus of Embodiment 1 The partial expanded sectional view which shows the structure of the boundary part of the 1st, 2nd waterproof insulation foil of the toilet seat heater in the toilet seat apparatus of Embodiment 1 Temperature rise characteristic diagram of toilet seat heater overheat prevention device and seating portion in toilet seat device of embodiment 1 The expanded sectional view of the mounting part of the overheat prevention device of the toilet seat heater of the toilet seat apparatus in Embodiment 2 of this invention The expanded sectional view of the mounting part of the overheat prevention device of the toilet seat heater of the toilet seat apparatus in Embodiment 3 of this invention External appearance perspective view which shows the sanitary washing apparatus in Embodiment 4 of this invention. Sectional drawing of the principal part of the conventional toilet seat apparatus

Explanation of symbols

110 Toilet Seat Device 200 Main Body 400 Toilet Seat 410U Seating Surface 450 Toilet Seat Heater 451 Second Metal Foil 453 First Metal Foil 455a First Waterproof Insulation Foil 455b Second Waterproof Insulation Foil 458, 458a, 458b Border 460 Linear Heating element 460c Dense area part 470a Heat sensitive part 496, 497, 498 Heat transfer promoting body 496a, 497a Thermal conductive paste material 499, 499b Cu molded body 499a Cu plate 900 Sanitary washing apparatus

Claims (10)

A toilet seat having a seating surface and containing a metal material; a toilet seat heater adhered to the back side of the seating surface; and an over-temperature prevention device having a heat sensitive portion, wherein the toilet seat heater has a pattern of densely wired patterns. A linear heating element having a region portion in part is held, and the linear heating element is sandwiched between a first waterproof insulating foil and a second waterproof insulating foil, and the wire is formed in the dense region portion. A toilet seat device in which a heat transfer accelerator is provided between the heat generating member and the first waterproof insulating foil, and the heat sensitive part of the overheat prevention device is in close contact with the first waterproof insulating foil. The toilet seat heater holds a predetermined arrangement pattern by sandwiching a linear heating element between the first metal foil and the second metal foil, the first metal foil and the second metal foil, 2. The toilet seat device according to claim 1, wherein the toilet seat device is sandwiched between a first waterproof insulating foil and a second waterproof insulating foil to prevent inundation at a boundary portion between the first waterproof insulating foil and the second waterproof insulating foil. . The toilet seat according to claim 1 or 2, wherein the first waterproof insulating foil and the second waterproof insulating foil are made of any one of polyester resin foils such as polyethylene terephthalate, polyesterimide, polyamideimide, and polyimide. apparatus. The toilet seat device according to any one of claims 1 to 3, wherein the heat transfer promoting body is configured by a filling portion of a heat conductive paste material. The toilet seat device according to any one of claims 1 to 4, wherein the heat transfer promoting body includes a Cu molded body. The toilet seat device according to any one of claims 1 to 5, wherein the heat transfer promoting body is constituted by a filling portion of a heat conductive paste material and a Cu plate, and the Cu plate is adhered to the waterproof insulating foil. 7. The heat transfer promoting body according to any one of claims 1 to 6, wherein the heat transfer promoting body is entirely or mostly configured by a Cu molded body, and a shape of a part of the Cu molded body is substantially matched with the uneven shape of the dense region portion. Toilet seat device. The toilet seat device according to any one of claims 1 to 7, wherein the dense region portion is provided in a region where a user is normally seated less frequently. The toilet seat device according to any one of claims 1 to 8, wherein the overheat prevention device uses a thermostat. The sanitary washing apparatus provided with the toilet seat apparatus of any one of Claim 1 to 9, and a main-body part.

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