JP2012205802A - Heated toilet seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heated toilet seat device for stopping induction heating before a temperature of a toilet seat reaches an abnormal temperature.SOLUTION: In the heated toilet seat device including: the toilet seat; a toilet lid for covering the upper part of the toilet seat; and a support body for supporting the toilet seat and the toilet lid and also outputting a current to heat the toilet seat, the toilet seat has a conductor for generating heat by induction heating, and the support body includes a first control portion for outputting the current, based on a heating energization pattern. The toilet seat or toilet lid has: an induction heating coil for generating a magnetic field for induction heating; and an induction heating control portion for converting the current into a high-frequency current to supply the current to the induction heating coil, and also stopping the supply of the high-frequency current to the induction heating coil when it is identified that the energization pattern of the current is different from the heating energization pattern.

Description

  The aspect of this invention is related with the heating toilet seat apparatus which can warm the toilet seat installed in a toilet bowl.

  In general, the seat surface of the toilet seat is made of resin such as PP (polypropylene), so the user may feel cold when sitting on a cold toilet seat when the temperature is low, such as in winter. is there. On the other hand, there exists a heating toilet seat apparatus which can warm a toilet seat. For such a heated toilet seat device, proposals for energy saving have been made.

  For example, a heating toilet seat device using induction heating for heating a toilet seat is disclosed (Patent Document 1). The heating toilet seat device disclosed in Patent Literature 1 can instantaneously heat the toilet seat by induction heating. However, a heating toilet seat device using induction heating cannot control induction heating if an abnormality occurs in a control unit that controls energization of current. For this reason, the temperature of the toilet seat may reach an abnormal temperature.

  On the other hand, the heating toilet seat apparatus provided with the electricity supply interruption | blocking apparatus which interrupts | blocks electricity supply after progress for a predetermined time from electricity supply control start is disclosed (patent document 2). However, in the heating toilet seat device disclosed in Patent Document 2, the energization interruption device interrupts energization after the temperature of the toilet seat exceeds an appropriate temperature and reaches an abnormal temperature, and the user may not be able to sit comfortably on the toilet seat. is there.

JP 2008-18114 A JP 2003-219983 A

  The present invention has been made based on the recognition of such a problem, and an object thereof is to provide a heating toilet seat device capable of stopping induction heating before the temperature of the toilet seat reaches an abnormal temperature.

  The first invention includes a toilet seat, a toilet lid capable of covering an upper portion of the toilet seat, and a support body that supports the toilet seat and the toilet lid and outputs an electric current for heating the toilet seat, The toilet seat has a conductor that generates heat by induction heating, the support has a first control unit that outputs the current based on an energization pattern for heating, and either the toilet seat or the toilet lid is The induction heating coil that generates a magnetic field for the induction heating, the current converted into a high-frequency current and supplied to the induction heating coil, and the current energization pattern different from the heating energization pattern are identified. And an induction heating control unit that executes control for stopping the supply of the high-frequency current to the induction heating coil.

  According to this heating toilet seat device, the induction heating control unit detects an energization pattern of current for heating the toilet seat, and when it is determined that the energization pattern of current is different from the energization pattern for heating, to the induction heating coil The control for stopping the supply of the high-frequency current is executed. Thereby, induction heating can be stopped before the temperature of a toilet seat reaches abnormal temperature. Even when an abnormality occurs in the first control unit that outputs current based on the heating energization pattern, the induction heating control unit stops induction heating by stopping the supply of high-frequency current to the induction heating coil. can do.

  Further, according to a second aspect of the present invention, in the first aspect, the energization pattern for heating is different from an energization pattern when the current is continuously energized, and the induction heating control unit is different from the first control unit. When the energization pattern of the output current is an energization pattern when the energization is continuously performed, the heating toilet seat device is characterized in that the supply of the high-frequency current is stopped.

  According to this heating toilet seat device, the heating energization pattern is different from the energization pattern when the current is continuously energized. Therefore, the induction heating control unit can reliably identify that the energization pattern of the current output from the first control unit is different from the energization pattern when continuous energization is performed. Thereby, even when abnormality occurs in the first control unit, the induction heating control unit can stop the induction heating by stopping the supply of the high-frequency current to the induction heating coil.

  In addition, according to a third invention, in the first or second invention, the energization pattern for heating is an energization pattern in which the current is de-energized at a predetermined timing in a unit time for controlling the induction heating. This is a heating toilet seat device.

  According to the heating toilet seat device, the heating energization pattern is an energization pattern in which the current is de-energized at a predetermined timing during the unit time for controlling the induction heating. In other words, the first control unit forms the heating energization pattern by executing energization control that allows only a period of time during which no power is supplied. Therefore, it becomes easier to control the current application.

  In a fourth aspect based on any one of the first to third aspects, the induction heating control unit controls an oscillation control unit that converts the current into the high-frequency current, and an operation of the oscillation control unit. And an energization pattern identification unit that stops the operation of the oscillation control unit by the second control unit when it is identified that the energization pattern of the current is different from the energization pattern for heating. This is a heating toilet seat device.

  According to this heating toilet seat device, when the energization pattern identification unit identifies that the current energization pattern is different from the heating energization pattern, the second control unit stops the operation of the oscillation control unit, and the induction heating coil Stop supplying high-frequency current. Thereby, when abnormal electricity supply arises, induction heating can be stopped and safety can be improved with a simpler circuit configuration.

  In a fifth aspect based on the fourth aspect, the second control unit is capable of adjusting an on-time per pulse of the high-frequency current, and the second control unit is capable of adjusting the on-time according to the output of the energization pattern recognition unit. It is a heating toilet seat device characterized by setting on time.

  According to this heating toilet seat device, the second control unit can adjust the ON time per pulse of the high-frequency current. Thereby, the 2nd control part can control the magnitude | size of induction heating output using the difference in an electricity supply pattern.

  The sixth invention is the invention according to any one of the first to fifth inventions, wherein the toilet seat further includes a heater that generates heat by electric resistance, and the induction heating coil, the induction heating control unit, and the heater The heating toilet seat device is provided inside a toilet seat, and the current is distributed and supplied to the induction heating coil and the heater inside the toilet seat.

  According to this heating toilet seat device, the electric current is distributed and supplied to the induction heating coil and the heater inside the toilet seat. Therefore, the power supply line to the toilet seat can be made into one system, and the cost can be reduced.

  According to the aspect of the present invention, a heating toilet seat device capable of stopping induction heating before the temperature of the toilet seat reaches an abnormal temperature is provided.

It is a perspective schematic diagram which illustrates the toilet apparatus provided with the heating toilet seat apparatus concerning embodiment of this invention. It is a schematic diagram showing the heating toilet seat apparatus concerning this embodiment. It is a circuit diagram of the heating toilet seat device concerning this embodiment. It is a timing chart for demonstrating the specific example of operation | movement of the heating toilet seat apparatus concerning this embodiment. It is a timing chart for demonstrating the other specific example of operation | movement of the heating toilet seat apparatus concerning this embodiment. It is a schematic diagram showing the heating toilet seat apparatus concerning other embodiment of this invention. It is a circuit diagram of the heating toilet seat device concerning this embodiment.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
FIG. 1 is a schematic perspective view illustrating a toilet apparatus including a heated toilet seat apparatus according to an embodiment of the invention.
FIG. 2 is a schematic diagram showing the heating toilet seat device according to the present embodiment.
2A is a schematic plan view of the heating toilet seat device according to the present embodiment as viewed from above, and FIG. 2B is a cross-sectional view taken along the line AA shown in FIG. It is a schematic diagram.

  The toilet device shown in FIG. 1 includes a Western-style seat toilet 800 and a heated toilet seat device 100 provided thereon. The heating toilet seat device 100 includes a casing (support) 400, a toilet seat 200, and a toilet lid 300. The casing 400 supports the toilet seat 200 and the toilet lid 300. Specifically, the toilet seat 200 and the toilet lid 300 are pivotally supported by the casing 400 so as to be freely opened and closed. The toilet lid 300 can cover the toilet seat 200 in the closed state.

  As shown in FIG. 2A, a first control unit 410 is provided inside the casing 400. On the other hand, an induction heating control unit 250 is provided inside the toilet seat 200.

  As illustrated in FIG. 2B, the toilet seat 200 includes a housing 210 that forms the outer shape of the toilet seat 200. The casing 210 of this embodiment is hollow and is formed of an insulating material such as a resin. Note that the housing 210 may be formed of a plurality of members or a single member.

  Inside the casing 210 of the toilet seat 200, an induction heating coil 222 that generates a magnetic field when a high-frequency current is applied is provided. In the toilet seat 200 shown in FIG. 2B, the induction heating coil 222 is attached to the upper surface (inner surface facing the seating surface) 210 a inside the toilet seat 200. However, the installation form of the induction heating coil 222 is not limited to this, and the induction heating coil 222 may be supported by a support body (not shown) provided inside the toilet seat 200.

  The toilet seat 200 is provided with a conductor 231 that is induction-heated by a magnetic field generated from the induction heating coil 222. More specifically, the conductor 231 generates heat due to an eddy current induced by a magnetic field generated from the induction heating coil 222. The conductor 231 is attached to the upper surface (sitting surface) of the toilet seat 200. Alternatively, the conductor 231 may be provided inside the casing 210 of the toilet seat 200. Alternatively, the conductor 231 may be attached to the upper surface 210 a inside the toilet seat 200.

  As the conductor 231, for example, a metal such as a ferromagnetic material such as iron or stainless steel or a paramagnetic material such as aluminum can be used. In order to make it difficult to emit a magnetic field to the outside of the toilet seat 200, it is more preferable to use a ferromagnetic material such as iron or stainless steel having a large electric resistance for the conductor 231. In the case where the conductor 231 is provided on the upper surface of the toilet seat 200, it is more preferable that the surface of the conductor 231 is coated or coated so that the human body and the conductor 231 are not in direct contact with each other. .

  The first control unit 410 controls energization of a current serving as a power source for induction heating, that is, a current (power source current) for heating the toilet seat 200. The induction heating control unit 250 controls the conversion of the power source current into a high frequency current. The induction heating control unit 250 controls a high-frequency current that is a high-frequency current obtained by converting the power supply current and is supplied to the induction heating coil 222.

According to the present embodiment, the heating toilet seat device 100 can rapidly heat the seating surface of the toilet seat 200 by using the principle of induction heating, and the seating surface can be appropriately heated earlier. Moreover, since the heating toilet seat apparatus 100 concerning this embodiment can heat the seating surface of the toilet seat 200 rapidly, when the user is not using the toilet seat 200, it is not necessary to keep the toilet seat 200 warm. Therefore, it is possible to reduce power consumption during standby and save energy.
The induction heating coil 222 and the induction heating control unit 250 may be provided inside the toilet lid 300, and the conductor 231 provided on the toilet seat 200 may be induction heated.

  In addition, the induction heating control unit 250 detects an energization pattern of the power supply current and determines whether or not the current supply state to the induction heating coil 222 is abnormal. When the induction heating control unit 250 identifies an abnormality in the energization pattern of the power supply current, that is, when it is identified that the state of current supply to the induction heating coil 222 is abnormal, the induction heating control unit 250 stops the supply of the high-frequency current. Therefore, according to the present embodiment, for example, even when an abnormality occurs in the first control unit 410, induction heating can be stopped before the temperature of the toilet seat 200 reaches the abnormal temperature. This will be described in more detail with reference to the drawings.

FIG. 3 is a circuit diagram of the heating toilet seat device according to the present embodiment.
FIG. 4 is a timing chart for explaining a specific example of the operation of the heating toilet seat device according to the present embodiment.

  For example, in the casing 400, a first control unit 410, an induction heating coil energization switch 421, and a first zero cross detection unit 431 are provided. The commercial power supply 10 is connected to the first controller 410, the induction heating coil energization switch 421, and the first zero cross detector 431. The first zero cross detection unit 431 detects the passage of the AC voltage at the zero point (zero cross point) when the commercial power supply 10 is switched on / off as shown in FIG. To do. Then, the first zero cross detection unit 431 transmits a detection signal of the detected zero cross point to the first control unit 410.

  The first control unit 410 forms a heating energization pattern as shown in FIG. 4B, for example, based on the detection signal sent from the first zero cross detection unit 431. The heating energization pattern formed by the first control unit 410 is not limited to the heating energization pattern illustrated in FIG. 4B, and can be distinguished from the commercial current energization pattern. If it is. The first control unit 410 may form a plurality of heating energization patterns when performing induction heating. The first controller 410 sends a control signal to the induction heating coil energization switch 421 so as to output a power supply current based on the formed heating energization pattern. That is, the first control unit 410 controls energization of the power supply current to be output based on the formed heating energization pattern. The induction heating coil energization switch 421 controls on / off of energization to the induction heating coil 222 by a control signal sent from the first control unit 410.

  In the toilet seat 200, a high frequency power supply circuit 500 and an induction heating control unit 250 are provided. The high frequency power supply circuit 500 generates a high frequency current and supplies the high frequency current to the induction heating coil 222. The high frequency power supply circuit 500 includes a rectifying unit 510, a smoothing unit 530, a resonance circuit 540, and an inverter 550.

  The rectifying unit 510 rectifies the current supplied from the commercial power supply 10 as illustrated in FIG. The smoothing unit 530 smoothes the pulsating current included in the current rectified by the rectifying unit 510. The smoothing unit 530 has a smoothing coil 531 that has a high impedance with respect to a high frequency and prevents noise from being transmitted to the commercial power supply 10 side, and a smoothing capacitor 533 that supplies a high frequency current flowing through the inverter 550.

  The resonance circuit 540 includes an induction heating coil 222 and a resonance capacitor 541. The inverter 550 includes a switching element 551 and controls power supplied to the resonance circuit 540. For example, an insulated gate bipolar transistor (IGBT) is used as the switching element 551.

  The induction heating control unit 250 includes a second zero cross detection unit 251, an energization pattern identification unit 253, a second control unit 255, and an oscillation control unit 257. As shown in FIG. 4C, the second zero cross detection unit 251 detects the passage of the zero cross point of the energization pattern of the power supply current output from the casing 400. The second zero cross detection unit 251 transmits the detected signal of the zero cross point to the energization pattern identification unit 253.

  The energization pattern identification unit 253 determines whether or not the energization pattern of the power supply current output from the casing 400 is abnormal based on the detection signal sent from the second zero cross detection unit 251. The energization pattern identification unit 253 transmits a determination signal to the second control unit 255. The second control unit 255 transmits a control signal to the oscillation control unit 257 based on the identification signal sent from the energization pattern identification unit 253 and controls the operation of the oscillation control unit 257. The oscillation control unit 257 controls on / off of the switching element 551 based on the control signal sent from the second control unit 255 and the voltage change of the resonance circuit 540. In other words, the oscillation control unit 257 converts the power supply current into a high-frequency current based on the control signal sent from the second control unit 255 and the voltage change of the resonance circuit 540, and supplies the high-frequency current to the induction heating coil 222. To control.

  In the toilet seat 200, first and second thermistors 259 and 261 for detecting the temperature of the toilet seat 200 are provided. The first thermistor 259 is connected to the second control unit 255. The first thermistor 259 detects the temperature of the toilet seat 200. The second control unit 255 can control on / off of the switching element 551 via the oscillation control unit 257 using the temperature information of the toilet seat 200 detected by the first thermistor 259 as one condition. Accordingly, the second control unit 255 can control the heating time and heating characteristics of the toilet seat 200 or the operation / stop of the high-frequency power supply circuit 500.

  The second thermistor 261 is connected to the first control unit 410. The first control unit 410 can control the induction heating coil energization switch 421 using the information on the temperature of the toilet seat 200 detected by the second thermistor 261 as one condition.

  As described above, the second control unit 255 gives an operation instruction to the oscillation control unit 257 to control on / off of the switching element 551. The operation of the oscillation control unit 257 is as follows.

  First, when the oscillation control unit 257 controls the switching element 551 to be in the ON state, the current supplied from the commercial power supply 10 is rectified by the rectifying unit 510, smoothed by the smoothing unit 530, and flows to the induction heating coil 222. When current flows through the induction heating coil 222, magnetic energy accumulates in the induction heating coil 222. Subsequently, when the oscillation control unit 257 controls the switching element 551 to be in an OFF state, no current is supplied from the commercial power supply 10, while energy stored in the induction heating coil 222 moves to the resonance capacitor 541 as electrostatic energy. . Thereafter, energy returns from the resonance capacitor 541 to the induction heating coil 222 again to resonate. In the middle of this resonance operation, when the switching element 551 is again turned on by the oscillation controller 257, the induction heating coil 222 is supplemented with magnetic energy. These operations are repeated to continue resonance.

  As described above, the oscillation control unit 257 switches and controls the switching element 551 between the on state and the off state, whereby resonance occurs in the induction heating coil 222 and the resonance capacitor 541, and a high-frequency current is generated. The high frequency current is supplied to the induction heating coil 222. The induction heating coil 222 generates a high frequency magnetic field by the supplied high frequency current. Due to this high frequency magnetic field, an eddy current is generated in the conductor 231 and the conductor 231 generates heat. By the above operation, for example, when a room entry detection sensor (not shown) detects the user's room entry, the second control unit 255 can control the energization to the induction heating coil 222 to heat the toilet seat 200 rapidly. Therefore, when the user sits on the toilet seat 200, the temperature can be set so as not to feel cold.

  Here, for example, when an abnormality occurs in the first control unit 410 when the second zero cross detection unit 251, the energization pattern identification unit 253, and the second control unit 255 are not provided in the induction heating control unit 250, The first control unit 410 may not be able to control induction heating. For example, energization of the power supply current output from the casing 400 may continue and the conductor 231 may continue to generate heat. As a result, the temperature of the toilet seat 200 may reach an abnormal temperature.

  On the other hand, an induction heating control unit 250 is provided inside the toilet seat 200 of the present embodiment. When the energization pattern identification unit 253 included in the induction heating control unit 250 identifies that the energization pattern of the power supply current is different from the heating energization pattern based on the detection signal sent from the second zero cross detection unit 251, It is determined that the energization pattern is abnormal. Then, the energization pattern identification unit 253 stops the operation of the oscillation control unit 257 by the second control unit 255 and stops the supply of the high-frequency current to the induction heating coil 222.

  Next, the control of induction heating will be described with reference to the specific example shown in FIG. 4. First, the first control unit 410 is energized for heating based on the detection signal sent from the first zero cross detection unit 431. Form a pattern. In this specific example, the first control unit 410 is a predetermined unit during the unit time for controlling induction heating (during the time between the heating energization patterns (1) to (8) shown in FIG. 4B). A heating energization pattern having a time (non-energization time) when the power supply current is de-energized at the timing is formed. This non-energization time zone is a time zone including one or more zero cross points of the current output from the commercial power supply 10. Specifically, as shown in “normal” in FIG. 4B, the first control unit 410 has 1 in 8 cycles of the current output from the commercial power supply 10 in the unit time for controlling the induction heating. An energization pattern for heating having a non-energization time at a cycle rate is formed.

  As shown in FIG. 4C, the second zero cross detection unit 251 detects the passage of the zero cross point of the power supply current energization pattern. Further, as shown in FIG. 4D, the rectifier 510 rectifies the power supply current. Then, the energization pattern identification unit 253 determines whether the power supply current is output based on the detection signal sent from the second zero cross detection unit 251 (timing t1 to t2). More specifically, the energization pattern identification unit 253 determines that the power supply current is output when the zero cross point continues three times from the start of output of the power supply current.

  When the energization pattern identifying unit 253 determines the output of the power supply current, the second control unit 255 starts the operation of the oscillation control unit 257 as illustrated in FIG. 4E (timing t2). Thereby, supply of the high frequency current (induction heating current) to the induction heating coil 222 is started, and execution of induction heating is started (timing t2).

  Subsequently, the energization pattern identification unit 253 determines whether or not the energization pattern of the power supply current is different from the energization pattern for heating based on the detection signal sent from the second zero cross detection unit 251. As described above, the first control unit 410 uses the heating energization pattern having a non-energization period at a rate of one period in eight periods of the current output from the commercial power supply 10 in the unit time for controlling the induction heating. Output current. Therefore, when there is no abnormality in the first control unit 410, the induction heating coil energization switch 421, etc., the second zero cross detection unit 251 performs 15 zero cross points (in the unit time for controlling the induction heating ( The passage of the zero cross points (1) to (15) between the timings t1 to t3 shown in FIG. 4C is detected, and the passage of the zero cross points is not detected during the non-energization time (timing t3 to t4).

  In this case, the energization pattern identification unit 253 identifies that the energization pattern of the power supply current is not different from the heating energization pattern. Then, the second control unit 255 continues the operation of the oscillation control unit 257.

On the other hand, if an abnormality occurs in the first control unit 410, the induction heating coil energization switch 421, or the like, the power supply current output from the casing 400 may be continued. In that case, since the first control unit 410 and the induction heating coil energization switch 421 are abnormal, the first control unit 410 cannot output the heating energization pattern and outputs the power supply current in the heating energization pattern. May not be possible. Then, the second zero-crossing detection unit 251 continuously performs 16 zero-crossing points during the unit time for controlling the induction heating (zero-crossing points (1) to t6 between timings t4 to t6 shown in FIG. 4C). (16)) is detected. In other words, the energization pattern identification unit 253 detects the energization pattern of the power source current based on the detection signal that the zero cross point is detected in the time zone (timing t5 to t6) in which the zero cross point cannot be detected if the current supply is normally performed. It is distinguished from the heating energization pattern formed by the first control unit 410.
In addition, when the energization pattern identifying unit 253 identifies that the energization pattern of the power supply current is different from the energization pattern for heating continuously for a plurality of unit times, for example, the zero cross point is continuously represented for a plurality of unit times. When detected, it is preferable to determine that the supply state of the power supply current is abnormal.

  In this case, the energization pattern identification unit 253 identifies an abnormality in the energization pattern of the power supply current. Then, the second control unit 255 stops the operation of the oscillation control unit 257 (timing t6). As a result, the supply of the high-frequency current to the induction heating coil 222 is stopped, and the induction heating is stopped (timing t6).

  According to the present embodiment, the energization pattern identification unit 253 identifies that the energization state to the high-frequency power supply circuit 500 that supplies the high-frequency current to the induction heating coil 222 is abnormal, so the first control unit 410 and the induction Even when an abnormality occurs in the heating coil energization switch 421 or the like, the supply of high-frequency current to the induction heating coil 222 can be stopped. When the supply of the high-frequency current to the induction heating coil 222 is stopped, the induction heating coil 222 cannot generate a magnetic field at a high frequency. Then, no eddy current is generated in the conductor 231 and the conductor 231 cannot generate heat. Thereby, induction heating can be stopped before the temperature of the toilet seat 200 reaches the abnormal temperature.

  Further, according to the present embodiment, the first controller 410 forms a heating energization pattern that can be distinguished from the energization pattern when the power supply current is continuously energized. That is, as described above, the first controller 410 forms a heating energization pattern having a non-energization time including one or a plurality of zero-cross points at a predetermined timing in a unit time for controlling induction heating. To do. Therefore, the energization pattern identification unit 253 can reliably identify that the energization pattern of the power supply current is different from the energization pattern when continuous energization is performed. Thereby, even when an abnormality occurs in the first control unit 410 and a heating energization pattern cannot be created, the supply of the high-frequency current to the induction heating coil 222 can be stopped. The first controller 410 forms a heating energization pattern having a non-energization time. That is, the 1st control part 410 forms the electricity supply pattern for heating by performing the control of electricity supply only to provide the non-energization time. Therefore, it becomes easier to control the energization of the power supply current. Furthermore, safety can be enhanced with a simpler circuit configuration.

FIG. 5 is a timing chart for explaining another specific example of the operation of the heating toilet seat device according to the present embodiment.
As shown in FIG. 5 (a), the oscillation control unit 257 by controlling the switching element 551 to the ON state, the coil current _{I L} flowing through the induction heating coil 222 increases (timing t101). Thereby, magnetic energy accumulates in the induction heating coil 222. Subsequently, when the oscillation control unit 257 controls the switching element 551 to be turned off, the magnetic energy stored in the induction heating coil 222 moves to the resonance capacitor 541 as electrostatic energy (timing t102). Therefore, the resonance voltage V _CE increases. The resonance voltage V _CE is a voltage applied to both ends of the switching element 551.

Subsequently, when the coil current _{I L} starts flowing in the opposite direction becomes zero, the resonance voltage _{V CE} begins to decrease (timing t103). That is, the resonance capacitor 541 starts to discharge. The resonance voltage V _CE tries to vibrate on the basis of the input voltage of the resonance circuit 540 (see the broken line shown in FIG. 5A), but is clamped by a flywheel diode or the like built in the switching element 551, for example. Therefore, it remains almost zero (timing t104). In addition, eddy current is generated in the conductor 231 during the above operation, and the conductor 231 generates heat, so that the resonance energy is attenuated.

In contrast, when the coil current _{I L} begins to increase again, the oscillation control unit 257 controls the switching element 551 to the ON state (timing t105). As a result, energy is again accumulated in the induction heating coil 222.

  Thus, the conductor 231 generates heat by the LCR resonance operation by the induction heating coil (L) 222, the resonance capacitor (C) 541, and the conductor (R) 231. Therefore, the induction heating output can be controlled by controlling the energy of the resonance operation. The energy of the resonance operation is determined by the vibration amplitude (current amplitude) and the frequency. Therefore, the second control unit 255 can control the induction heating output by adjusting the on-state time (on time) of the switching element 551 per pulse of the high-frequency current and controlling the vibration amplitude or frequency. it can.

The case where the induction heating output is reduced will be described as an example with reference to FIG.
As shown in FIG. 5A and FIG. 5B, when the oscillation control unit 257 shortens the on-time of the switching element 551 per pulse of the high frequency current according to the instruction of the second control unit 255, the coil current vibration amplitude of I _L is small. That is, the vibration amplitude of the coil current I _L in the operation shown in FIG. 5 (b), smaller than the vibration amplitude of the coil current I _L in the operation expressed in Figure 5 (a).

Therefore, the resonance amplitude of the resonance voltage V _CE in the operation illustrated in FIG. 5B is smaller than the resonance amplitude of the resonance voltage V _CE in the operation illustrated in FIG. In addition, the resonance energy in the operation illustrated in FIG. 5B is smaller than the resonance energy in the operation illustrated in FIG. Thereby, the 2nd control part 255 can control induction heating output by adjusting ON time of switching element 551 per pulse of high frequency current.

  Further, as shown in FIG. 5B, the second control unit 255 shortens the on-time of the switching element 551 per pulse of the high-frequency current and suppresses the induction heating output, thereby reducing the seating surface of the toilet seat 200. You can also keep warm. A first thermistor 259 is connected to the second controller 255. Therefore, the second control unit 255 can also adjust the on-time of the switching element 551 per pulse of the high-frequency current by performing feedback control using the first thermistor 259.

Next, another embodiment of the present invention will be described with reference to the drawings.
FIG. 6 is a schematic diagram showing a heating toilet seat device according to another embodiment of the present invention.
6A is a schematic plan view of the heating toilet seat device according to the present embodiment as viewed from above. FIG. 6B is a cross-sectional view taken along the line BB in FIG. 6A. It is a schematic diagram.

  In the toilet seat 200a of the heating toilet seat device 100a according to the present embodiment, a heater 241 and a heat conductor 243 are further provided with respect to the toilet seat 200 described above with reference to FIG. The induction heating coil 222 is attached to the upper surface (inner surface facing the seating surface) 210a inside the casing 210 of the toilet seat 200a.

The heater 241 is disposed on the side opposite to the conductor 231 when viewed from the induction heating coil 222. In other words, the heater 241 is disposed at a position farther than the induction heating coil 222 when viewed from the conductor 231.
The heater 241 can heat or heat the seating surface of the toilet seat 200a by generating heat when energized. The heater 241 can generate heat (Joule heat) by the energized current and the electric resistance of the heater 241 itself. As such a heater 241, for example, a “tube heater”, “seeds heater”, “halogen heater”, “carbon heater”, or the like can be used.

The heat conductor 243 can spread the heat generated by the heater 241 substantially uniformly over the entire seating surface. The heat conductor 243 is provided between the induction heating coil 222 and the heater 241, and has a function of insulating the induction heating coil 222 and the heater 241.
The other structure of the heating toilet seat apparatus 100a according to this embodiment is the same as the structure of the heating toilet seat apparatus 100 described above with reference to FIGS.

FIG. 7 is a circuit diagram of the heating toilet seat device according to the present embodiment.
As described above with reference to FIG. 6, the heater 241 that generates heat by electric resistance is provided inside the toilet seat 200a. The circuit of the induction heating coil 222 and the heater 241 is branched inside the toilet seat 200a. That is, the power supply current that is controlled by the first control unit 410 is distributed and supplied to the induction heating coil 222 and the heater 241 inside the toilet seat 200a.

  The second thermistor 261 is connected to the first control unit 410. The second thermistor 261 detects the temperature of the toilet seat 200a. The first control unit 410 can control the induction heating coil energization switch 421 using information on the temperature of the toilet seat 200a detected by the second thermistor 261 as one condition. Thereby, energization to the heater 241 is controlled. Other circuit configurations are the same as those described above with reference to FIG.

  According to this embodiment, the power source current output from the casing 400 is distributed to the induction heating coil 222 and the heater 241 inside the toilet seat 200a. Therefore, the power supply line 221 to the toilet seat 200a can be made into one system. As the heater 241, a heater having a relatively low output can be selected.

  Thereby, the comparatively thin power supply line 221 can be used, and the efficiency of the wiring work of the power supply line 221 can be improved. In addition, since the power supply line 221 can be integrated into one system, the cost can be reduced.

The embodiment of the present invention has been described above. However, the present invention is not limited to these descriptions. As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention. For example, the shape, size, material, arrangement, etc. of each element included in the heating toilet seat devices 100, 100a, the installation form of the induction heating coil 222, the heater 241, and the conductor 231 are not limited to those illustrated. It can be changed as appropriate.
Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

  DESCRIPTION OF SYMBOLS 10 Commercial power supply, 100, 100a Heating toilet seat apparatus, 200, 200a Toilet seat, 210 Housing | casing, 210a Upper surface, 221 Power supply line, 222 Induction heating coil, 231 Electric conductor, 241 Heater, 243 Thermal conductor, 250 Induction heating control part 251 second zero cross detection unit, 253 energization pattern identification unit, 255 second control unit, 257 oscillation control unit, 259 first thermistor, 261 second thermistor, 300 toilet lid, 400 casing, 410 first Control unit, 421 induction heating coil energization switch, 431 first zero cross detection unit, 500 high frequency power supply circuit, 510 rectification unit, 530 smoothing unit, 531 smoothing coil, 533 smoothing capacitor, 540 resonance circuit, 541 resonance capacitor, 550 inverter, 551 Switching element, 800 Western-style toilet

Claims (6)

Toilet seat and
A toilet lid capable of covering an upper part of the toilet seat;
A support that supports the toilet seat and the toilet lid and outputs a current for heating the toilet seat;
With
The toilet seat has a conductor that generates heat by induction heating,
The support has a first control unit that outputs the current based on a heating energization pattern,
Either the toilet seat or the toilet lid includes an induction heating coil that generates a magnetic field for induction heating, and the current is converted into a high-frequency current and supplied to the induction heating coil. A heating toilet seat device comprising: an induction heating control unit that executes control to stop the supply of the high-frequency current to the induction heating coil when it is identified that the current energization pattern is different. The energization pattern for heating is different from the energization pattern when the current is continuously energized,
The induction heating control unit stops the supply of the high-frequency current when the energization pattern of the current output from the first control unit is an energization pattern when the continuous energization is performed. The heated toilet seat device according to claim 1.   The heating toilet seat device according to claim 1 or 2, wherein the heating energization pattern is an energization pattern in which the current is not energized at a predetermined timing in a unit time for controlling the induction heating. The induction heating control unit
An oscillation control unit for converting the current into the high-frequency current;
A second control unit for controlling the operation of the oscillation control unit;
An energization pattern identification unit for stopping the operation of the oscillation control unit by the second control unit when identifying that the energization pattern of the current is different from the energization pattern for heating;
The heating toilet seat device according to any one of claims 1 to 3, wherein the heating toilet seat device is provided.   5. The second control unit is capable of adjusting an on time per pulse of the high-frequency current, and sets the on time according to an output of the energization pattern recognition unit. Heating toilet seat device. The toilet seat further includes a heater that generates heat due to electrical resistance,
The induction heating coil, the induction heating control unit and the heater are provided inside the toilet seat,
The heating toilet seat device according to any one of claims 1 to 5, wherein the current is distributed and supplied to the induction heating coil and the heater inside the toilet seat.

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