JP3190716B2 - Toilet seat device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a sanitary washing apparatus for sanitarily cleaning a local area after adding water with hot water, and has a built-in control device and the like which are essential parts of the sanitary washing apparatus. The present invention relates to a toilet seat device capable of heating a toilet seat to an appropriate temperature by electrically connecting a control box and a heater disposed inside a toilet seat pivotally supported by the control box so as to be freely opened and closed without using a connection cord. .

[0002]

2. Description of the Related Art In recent years, there has been a remarkable spread of sanitary washing apparatuses which are capable of performing a sanitary and comfortable washing treatment with washing water (warm water) in which a local area after use is heated to an appropriate temperature. In the sanitary washing device W, for example, as shown in FIG. 7, a horizontally long control box 3 is attached to the rear of the upper surface of a Western-style toilet 2 on which the toilet seat 1 is mounted so as to be able to move up and down. Is a water supply pipe 4 connected to a water supply source (not shown).
Is piped through a solenoid valve 5 and a heating device 6 having a built-in heater for heating the washing water at an appropriate temperature. At the end of the water supply pipe 4, a nozzle 7 for jetting the washing water is directed toward the inside of the toilet bowl 2. It is installed so that it can move forward and backward at an angle. Then, In use, as shown in FIG. 7, when the cleaning switch S ₁ disposed on the upper surface of the operation housing 3a which is extended to the front side of the toilet 2 at one end of the control box 3 to turned on, the control box 3 The electromagnetic valve 5 is opened by a command from a control device (not shown), and the cleaning water flows into the heating device 6, and the heater in the device 6 is energized to instantaneously clean the flowing cleaning water. Then, the nozzle 7 is heated to an optimum temperature, and hot water is ejected from the nozzle 7 toward the local area of the user P to wash the local area. After washing, by pressing a stop switch (not shown) on the operation housing 3a, the electromagnetic valve 5 is closed to stop the ejection of the hot water, and at the same time, the heater is turned on and the amount of water is small enough to keep the warm water in the heating device 6 warm. Switching to the amount of energization is performed, and these are all configured to be performed by a command from the control device. In FIG. 7 · S ₂ is dry, S ₃ denotes each operation switch of the toilet seat.

Next, the toilet seat 1 used in the sanitary washing device W is described.
Is generally configured as shown in FIG. That is, in FIG. 8 (only the configuration of the heating device is shown in FIG. 8), reference numeral 8 denotes a heater disposed on the back of the toilet seat 1.
9 is a sensor for detecting the temperature of the toilet seat disposed close to the heater 8, and 10 is for variably controlling the amount of electricity supplied to the heater 8 in accordance with the detection signal of the sensor 9 to maintain the surface temperature of the toilet seat 1 at a preset temperature. The controller is provided in a control device (not shown) of the sanitary washing device. Reference numeral 11 denotes a connection cord for connecting the controller 10 and the heater 8, and reference numeral 12 denotes a power cord. By heating the surface of the toilet seat 1 configured as described above to an appropriate temperature by the heater 8, when the user P sits on the toilet seat 1, the feet can be comfortably performed.

[0004]

In the sanitary washing apparatus W configured as described above, for example, when the toilet seat 1 is soiled by the adhesion of sewage or the like and is cleaned, generally,
The contaminated portion was wiped off using a cloth or the like impregnated with a detergent or disinfectant. However, when wiping with a rag,
It was only possible to clean relatively accessible places such as the front and back surfaces of the toilet seat 1, and it was particularly difficult to wipe off the soiled portion of the rear surface of the toilet seat near the pivot with the control box 3.
Further, as described above, even if the stained portion is wiped by hand, the stain caused by the stain on the front surface and the back surface of the toilet seat 1 cannot be completely removed. In such a case, the stain on the back surface was conspicuous, often giving the user a feeling of dirty. Further, even when cleaning, the body was close to the toilet, so the cleaning work was very resistant. In order to solve the above problem, it is best if the toilet seat 1 is removed from the control box 3 by removing the hinge pin 13 in FIG. 8 and the whole can be washed with a detergent or the like in another place. However, as shown in FIG. 8, since the toilet seat 1 and the control box 3 are usually connected by the connection cord 11 for supplying power to the heater 8, the connection cord 11
The toilet seat 1 cannot be washed unless the connection state is canceled. In addition, washing the toilet seat 1 by disconnecting the connection cord 11 not only takes time and effort,
There is a safety problem when reconnecting the connection cord 11 and the like, and it was practically impossible to wash the toilet seat 1 in whole. It is also conceivable to connect the connection cord 11 to the toilet seat 1 such that the connection cord 11 can be energized by a detachable insertion method. In this case, the toilet seat 1 can be washed in its entirety, but the connection on the toilet seat 1 side is possible. If moisture remains in the insertion port of the cord 11, there is a problem that an electric shock accident or the like may be caused upon re-energization.

On the other hand, when it is clean the toilet seat 1 and the toilet 2, or press the cleaning switch S ₁ incorrectly, is open solenoid valve 5 is immediately hot water heated to a suitable temperature by the heating device 6 There were also problems such as spouting and wetting the clothes of the cleaners and the floor of the toilet. In order to solve the above problem, for example, a mechanical weight switch or a detection sensor is attached to a portion corresponding to the upper surface of the toilet 2 below the toilet seat 1, and when a user sits on the toilet seat 1, the user sits down according to the weight of the user. Or a seat can be detected by using an infrared or ultrasonic sensor mounted near the toilet seat. However, in the former case, it is impossible to determine the distinction between the human body and the object, and even if the object is placed on the toilet seat 1, the sitting may be detected. On the other hand, in the case of a light weight child, the sitting may not be reliably detected. was there. In the latter case, even if a person or an object is brought close to the toilet seat without sitting on the toilet seat, the seat may be erroneously determined to be seated. Thus, even if attached to the weight switch and a sensor, etc., often it determines that incorrectly seated, in this case, when the cleaning switch S ₁ incorrectly or turned still a problem that the hot water is ejected from the nozzle Yes, none of them could be a solution to avoid erroneous operations.

In view of the above-mentioned various problems, the present invention enables a heater disposed on the back of a toilet seat to be energized without using a connection cord, and allows only the toilet seat to be detached from a control box to be washed with water. In addition, even if the washing switch of the sanitary washing device is accidentally turned on when cleaning the toilet seat, etc., unless the person is seated on the toilet seat, the warm water spouts by opening the solenoid valve to wet the clothes of the cleaner and the like. It is an object of the present invention to provide a toilet seat device in which there is no toilet seat.

[0007]

According to the present invention, a control device for controlling the temperature of hot water and hot air of a sanitary washing device is provided on a control box side for pivotally opening and closing a toilet seat. An inverter control circuit, which is a combination of an inverter control circuit and an energization control circuit composed of a PWM-IC for controlling energization of a heater disposed on a toilet seat and connected to a primary winding wound on an iron core, and a rectifier; And a forward conversion circuit including a smoothing circuit and connected to a commercial power supply, and, like the output transformer, connected to the secondary side of the signal transformer and corresponding to the frequency of a signal output from the secondary side of the signal transformer. A frequency-voltage conversion circuit for generating a DC voltage, and a seating signal for detecting a signal output from the secondary side of the signal transformer and determining whether the seat is seated on the toilet seat based on the magnitude of the output voltage. Generator circuit Is provided on the side of the toilet seat, on the back side of which a heater for heating is disposed, is connected to the secondary winding and the tertiary winding wound around the iron core of the output transformer. A rectifier circuit (a power supply circuit for a heater), a DC power supply circuit for supplying control power, a seating detection circuit connected to an energization circuit of a heater connected to the rectification circuit via an inductor and a heater, and a toilet seat. A resistance-frequency conversion circuit for converting a detection signal (resistance value) from a temperature detection sensor for detecting the temperature of the object into a frequency, and further, an output signal from the seating detection circuit and the resistance-frequency conversion circuit
Modulation (amplitude modulation), that is, a second control system constituted by a modulation circuit which mixes both output signals and outputs the mixed signal to a primary winding wound around an iron core of a signal transformer, to constitute a toilet seat device. Therefore, the operation is as follows.

[0008]

According to the present invention, as described above, the primary winding of the output transformer is completely separated from the secondary winding and the tertiary winding, and the first control system connected to the primary winding is provided. , An electromagnetic valve and a heating device are provided on the control box side, while the second control system connected to the secondary and tertiary windings is provided on the toilet seat side where the heater is provided. When power is supplied to the first control system, the commercial power supply (AC) is rectified into DC by a forward conversion circuit, and this DC output is converted into a PWM voltage waveform of a required frequency by an inverse conversion circuit incorporating an inverter circuit. It is converted and supplied to the primary winding of the output transformer as AC power of a predetermined voltage. The energy (power) stored in the primary winding of the output transformer is efficiently supplied to the secondary winding of the output transformer by the voltage resonance effect of the secondary winding and the resonance capacitor. Then, when power is supplied to the secondary winding of the output transformer, the power is rectified to DC in the rectifier circuit, and is efficiently supplied to the heater to heat the toilet seat. On the other hand, the temperature of the toilet seat is detected by a temperature detection sensor, and the detection signal is converted into a high-frequency signal through a resistance-to-frequency conversion circuit-modulation circuit. One of the signal transformers
The power is transmitted from the secondary winding to the secondary winding and is input to an energization control circuit, which is compared with a reference voltage to increase or decrease the PWM ratio of the inverter circuit, thereby controlling the power supplied to the heater, and Keep the temperature constant. As a result, the electric power to the heater of the toilet seat can be supplied to the heater without using a heater energizing cord by dividing each of the output and signal transformers into two parts and attaching and detaching the magnetic coupling. Troubles associated with disconnection of cords can be reliably eliminated.

In the present invention, an inductor having a low impedance with respect to a commercial power supply and a high impedance with respect to a high-frequency signal output from an oscillator is connected in series in an energizing circuit of the heater. The energizing circuit of the heater is insulated from the high-frequency signal and is separated into two to form a pair of electrodes. When the seat is not seated on the toilet seat, the capacitance between the electrodes is reduced. Conversely, when the user is seated on the toilet seat, the capacitance between the electrodes increases rapidly, and when this capacitance approaches a predetermined capacitance value, this is detected by the seating detection means. By turning on the washing switch only at this point, hot water is spouted to clean the local area, so even if the washing switch is accidentally turned on when cleaning the toilet seat, etc. The problem of wetting the ejection to the user of the clothing and toilet floor surface or the like can be reliably eliminated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 to 3, reference numeral 21 denotes a toilet seat mounted on a Western-style toilet 22, and a horizontally long main body (hereinafter referred to as a control box) in which both rear side surfaces are installed on the back of the upper surface of the toilet 22.
23 ) are attached to hinge 23 via hinge pins 24, 24 so as to be freely opened and closed. Reference numeral 25 denotes a heating device housed and installed in the control box 23, one of which is connected to a water supply source (not shown) via a solenoid valve 26 and a water supply pipe 27, and the other of which is capable of moving back and forth into the toilet bowl 2 via a hot water pipe 28. A protruding hot water nozzle 29 is connected. Reference numeral 30 denotes a power supply cord for power supply.
A first control system X having a control means for controlling the temperature of the washing water heated by the heater and the temperature of the hot air blown out from a hot air device (not shown), and a means for controlling the toilet seat temperature to a predetermined temperature is provided. It is connected and accommodated in the control box 23.
Reference numeral 31 denotes a toilet seat heating heater disposed on the back of the toilet seat 21. The toilet seat 21 having the heater 31 includes a toilet seat 21.
A second control system Y for sending temperature information for detecting the temperature of the toilet seat and seating information for detecting that the user is seated on the toilet seat 21 to the first control system X is accommodated. The supply of power from the first control system X to the second control system is performed by an output transformer.
Performed by (non-contact power supply means) T _2, the second control system Y
From the signal to the first control system X sends the signal transformer (Non
Performed by the contact signal transmission means) T _3. 32 is a toilet lid.

Next, the structure of the output transformer T ₂ is shown in FIG.
This will be described below. The transformer T ₂ are, for example, a core 33 which is formed by dividing the primary side and the secondary side with a ferrite core, a primary winding N ₁ and was wound around the core 33 of the primary side The primary and secondary windings N ₂ , N ₃ wound around a secondary-side iron core 34 and having a primary winding N ₁ as shown in FIG. For example, inside
The secondary and tertiary windings N are formed integrally with the wall by resin molding.
_The portion provided with ₂ and N ₃ is integrally formed by performing resin molding on the rear wall of the toilet seat 21 so as to face the primary winding N ₁ side, thereby forming the output transformer T _2. The control box 23 and the toilet seat 21 can be provided separately.
The signal transformer T _3, as shown in Figure 5, similar to the output transformer T _2, on one of the core 35 of 2 divided core 35,35a primary winding F _1, to the other core 35a is 2 the winding F ₂ by dividing each being formed by winding, as shown in Figure 1, the primary winding F ₁ side seat 2
The first rear wall side, the secondary winding F ₂ front wall side of the control box 23, are integrally formed are respectively resin molded. Incidentally, the cleaning switch in FIG 1, S _1, switch S ₂ For dry, S ₃ represents an operation switch for energization start and stop of the heater 31 of the toilet seat 21, further, S ₄ is clean and dry switch S ₁ is a stop switch for stopping the introduction of S _2.

Next, the circuit configuration of the first control system X and the second control system Y in the toilet seat device of the present invention will be described with reference to FIG. First, the first box housed in the control box 23
The control system X of roughly includes the secondary winding F ₂ side of the primary winding N ₁ and the signal transformer T ₃ of the output transformer T _2, the forward conversion circuit 36, an inverse transform circuit 37, the frequency - It comprises a voltage conversion circuit 38, a seating signal generation circuit 39, and a power supply circuit 40 for supplying control power to each of the circuits.

Next, the details of each circuit will be described. The forward conversion circuit 36 is composed of a diode bridge DB and a smoothing capacitor Ca, and is connected to a commercial power supply 40a to rectify an AC power supply into a DC power supply and reverse it. Output to the conversion circuit 37. The inverse conversion circuit 37 includes a switching element 4.
1, 42 in series, and each element 41, 42
The diode D, an inverter circuit 43 constituted by connecting in reverse parallel to D _1, through the conduction control circuit 44 for controlling the energization of the inverter circuit 43 to the seat 21 provided with a PWM-IC for PWM control Is composed of
Its output is connected to the primary winding N ₁ of the output transformer T _2. Then, the energization control circuit 44, at its input, the reference voltage V output from the temperature setting circuit 45 for setting a toilet seat temperature by the variable resistor VR through the resistor R ₁
And the toilet seat 21 output from the frequency-voltage conversion circuit 38
An output obtained by comparing the output voltage R corresponding to the detection signal of the temperature detection sensor 52 for detecting the temperature of the output signal with the error amplifier 46 is input. When the input is R <V, the output from the temperature control circuit 44 is It increases the PWM control ratio of the inverter circuit 43, in the case of R> V, conversely, measure increase or decrease, the power supplied by reducing the PWM control ratio to the output transformer T _2. Therefore, in this example, the DC output rectified by the forward conversion circuit 36 is converted by the inverter circuit 43 into, for example,
Convert to high frequency power of 200kHz and output transformer T ₂
Is to be supplied to

The seat signal generation circuit 39 includes a signal transformer T
₃ the secondary winding F ₂ and the detection circuit of the detection diode D ₂ and resistor R ₂ is inserted in series between the ground, a capacitor C ₁ for smoothing the output of the detection wave circuit, the resistor R _3, R ₄ and a comparator 47 for comparing the reference voltage with the output voltage from the seating detection circuit. The comparator 47 outputs “H”. "When the level of the signal is outputted, it is determined that the user on the toilet seat 21 is seated, when turning on the washing switch S ₁ shown in FIG. 1 at this time, the solenoid valve 26 is opened, the heating device washing water 25 The hot water of the appropriate temperature heated here is ejected from the nozzle 29.

Subsequently, the power supply circuit 40 is connected to the commercial power supply 40.
constituted by a power transformer T ₁ connected to the primary side to a, a diode bridge DB connected to the secondary side, a smoothing capacitor C ₂ connected in parallel to the DC output ends of the diode bridge CB and voltage regulator 48 Then, a constant voltage power supply Vcc, which is obtained by stepping down a commercial power supply and full-wave rectified, is supplied to each of the circuits as an operation power supply.

Next, the second control system Y housed in the toilet seat 21 is roughly divided into the secondary windings N ₂ , N ₃ , F _{1 of the} output transformer and the primary windings of the signal transformer T _3. At
Rectifier circuit 5 connected to secondary winding N ₂ of output transformer T ₂
0, a seating detection circuit 51 for detecting whether or not the user has seated on the toilet seat 21 including an energizing circuit of the heater 31 disposed on the back side of the toilet seat 21, and a temperature of the toilet seat 21 heated by the heater 31 is detected. A resistance-frequency conversion circuit 53 that converts a detection signal (resistance value) from the temperature detection sensor 52 to a frequency,
The output signal of the occupant detection circuit 51, the resistance - the output from the frequency converting circuit 53 to the primary winding F ₁ side of the signal transformer T ₃ and AM modulation, the seating detection signal and resistor outputted from the occupant detection circuit 51 - the temperature detection signal and the modulation circuit 54 supplies a state in which no high-frequency signal by mixing the output from the frequency converting circuit 53, further, the front is connected to the tertiary winding N ₃ of the output transformer T ₂ And a DC power supply circuit 55 for supplying operation power to the circuit.

[0017] Next, the details of each circuit in the second control system Y, the rectifier circuit 50 is the output transformer T ₂
The resonance capacitor C ₃ connected to the output terminal of the secondary winding N ₂
Is connected to the AC input terminal, and the DC output terminal is connected to the inductor Ra,
Transmitted via the Rb and the diode bridge DB ₁ to be connected to the heater 31 in series, and is configured by including a smoothing capacitor (not shown), a high frequency power to the secondary side to be supplied to the primary side of the output transformer T ₂ Output transformer T
And a secondary winding reactance of N ₂ L _2, and a capacitance C of the resonant capacitor C _3, by selecting the LC to resonate with the input frequency to be inputted to the primary side, the secondary winding voltage output from the N ₂ is the inductance L and the parallel resonance by the capacitance C of the resonant capacitor C ₃ and (voltage resonance), by rectifying and smoothing the oscillating voltage (AC output) into a DC by the rectifier circuit 50 heater 31 and is heated to heat the surface of the toilet seat 21. The rectification of the high-frequency power supplied to the secondary winding N ₂ of the output transformer T ₂ to DC by the rectifier circuit 50 simplifies the detection of seating, and causes a high-frequency current to flow through the heater 31 to the human body. This is to take into account the effects and disturbances due to noise radio waves to peripheral devices. When supplying a DC output to the heater 31, the inductor R
a and Rb are connected, and the inductors Ra and Rb
As for b, a current flowing to the low-frequency power source and a current flowing little to the high-frequency signal are selected, so that the supply of the DC output to the heater 31 is not hindered at all and smoothly. Energization can be performed.

The seating detection circuit 51 includes a high-frequency transformer 56
And an oscillator 5 connected to one of the primary sides a of the transformer 56.
7, a resonance coil 58 inserted and connected between the other of the primary side and ground, a reference voltage generating circuit d inserted and connected between an intermediate point between the oscillator 57 and the primary side a of the transformer 56 and ground. Further, a detection circuit e connected between the other side of the primary side a of the transformer 56 and the ground via the resonance coil 58 and a non-inverting terminal are connected to the output terminal of the reference voltage generating circuit d. It comprises a comparator 59 connected to the output terminal of the detection circuit e. Further, the secondary side b of the high-frequency transformer 56 is the heater 31, the inductor Ra, via Rb are connected to the DC output ends of the diode bridge DB ₁ of the rectifier circuit 50. The inductors Ra and Rb have a low impedance with respect to the low-frequency power supply, and have a high impedance with respect to the high-frequency signal output from the secondary side of the high-frequency transformer 56 to the energizing circuit of the heater 31. Since the heater 31 is used, the heater 31 does not cause any trouble to the DC output from the rectifier circuit 50 due to the presence of the inductors Ra and Rb. On the contrary, the heater 31 is insulated from the high frequency signal. As a result, it is possible to prevent the high-frequency signal from looping in the energizing circuit of the heater 31. Therefore, in FIG. 1, it is possible to form one of the heaters 31 as the electrode A and the other as the electrode B.

The high frequency signal of, for example, 500 KHz output from the oscillator 57 always flows through the resonance coil 58 connected to the primary side a of the high frequency transformer 56.
When the capacitance between the electrodes A and B that divide the current supply circuit of the heater 31 into two is small (when not sitting on the toilet seat 21), the oscillation frequency output from the oscillator 57 and the high-frequency transformer 56
The voltage generated at both ends of the resonance coil 58 naturally decreases due to a large difference between the capacitance of the power supply circuit of the heater 31 connected to the secondary side and the resonance frequency determined by the resonance coil 58. Has been detected (non-seated). Therefore, the frequency output from the oscillator 57 matches the resonance frequency determined by the capacitance C between the electrodes A and B and the inductance L of the resonance coil 58 caused by the presence of a human body between the electrodes A and B. By selecting a constant for, when sitting on the toilet seat 21,
The resonance current flowing through the energization circuit of the heater 31 is maximized, whereby the voltage generated in the resonance coil 58 can be increased (detection of seating).

The reference voltage setting circuit d includes an oscillator 57
Detection diode D for half-wave rectification of AC output from
₃ ; a smoothing capacitor C ₄ ; and a resistor R _5. An output (reference voltage) Vs set by the CR time constant of the resistor R ₅ and the smoothing capacitor C ₄ is output to the non-inverting terminal of the comparator 59. . The reference voltage Vs is set at, for example, an intermediate value of the capacitance between the electrodes A and B when the toilet seat 21 is not seated and when it is seated. The detection circuit e is
A detection diode D ₄ which half-wave rectifies the AC output with the resonance coil 58 to the primary side of the high-frequency transformer 56 connected in parallel generated across the resonant coil 58, made from the smoothing capacitor C ₅ and the resistor R ₆ Prefecture, The output (detection voltage) Vt smoothed by the CR time constant by the resistor R ₆ and the smoothing capacitor C ₅ is output to the inverting terminal of the comparator 59.

The resistance-frequency conversion circuit 53 includes a resistance-voltage conversion circuit and a voltage-frequency conversion circuit, and converts a resistance value corresponding to the temperature detected by the temperature detection sensor 52 into a pulse of a frequency. The signal is converted and output to the modulation circuit 54. The temperature detection sensor 52 detects the temperature of the toilet seat 21 using a thermistor having a negative characteristic in which the resistance value decreases as the toilet seat temperature increases, and outputs the detected temperature as toilet seat temperature information.

Next, the modulation circuit 54 includes a pair of switching elements 61 and 62 connected in series, and a resistor R connected between an intermediate point between the elements 61 and 62 and the constant voltage power supply Vdd of the DC power supply circuit 55. is constituted by a _7, the base of the output end one switching element 61 of the occupant detection circuit 51, also, the base of the other switching element 62 resistance - the output end of the frequency conversion circuit 53 are respectively connected. The modulation circuit 54 changes the amplitude of the carrier (AM) based on the seating detection signal output from the seating detection circuit 51.
Modulation), and changes the frequency of the carrier by the temperature detection signal output from the resistance-frequency conversion circuit 53 (FM modulation).
That is, a carrier wave of a signal that detects the seating and the temperature is output (however, when the seating detection signal is not output, the signal is non-seated and only the temperature detection signal is output), and the two signals are output. a high-frequency signal in a state of being mixed, form a respective seating detection information and the toilet seat temperature information output to the primary winding F ₁ side of the signal transformer T _3. The primary winding F ₁
High-frequency signal supplied to the by magnetic coupling of the signal transformer T _3, is the secondary input signal is supplied as it is to the secondary side of signal transformer T _3.

Next, the operation of the toilet seat device of the present invention will be described. First, heating of the toilet seat 21 will be described.
For example, AC50 / 6 supplied from the commercial power supply 40a
The power supply of 0 Hz 100 V
In this example, the voltage is rectified to 140 V DC and supplied to the inverse conversion circuit 37. The DC power supplied to the inverse conversion circuit 37 is, for example, supplied by an inverter circuit 43 in the inverse conversion circuit 37 employing a half-bridge type separately-excited inverter.
While being converted to a PWM voltage waveform of 200kHz, it is supplied to the output transformer T ₂ as a high-frequency power. Output transformer T ₂ of the primary winding N ₁ frequency supplied at a predetermined voltage side power (AC power), it is transferred to the secondary and tertiary winding N _2, N ₃ side of the output transformer T ₂ You. At this time, in this embodiment the primary winding N ₁ of the output transformer T ₂ is housed in the control box 23, also 2,3 winding N _2, N
_{The third} side is housed separately from the primary winding N ₁ in the toilet seat 21, but as shown in FIG. 3, when the toilet seat 21 is mounted on the toilet 22, Control box 23
The spacing between the front wall of the is very small, thereby, be output transformer T ₂ are separated and the primary side and the secondary side, it becomes possible to closely magnetically coupled, as a result , can be transmitted (supplied) to the primary winding satisfactorily 2,3 winding the high frequency power input to the N ₁ side N _2, N ₃ of the output transformer T _2.

[0024] As described above, the AC power from the commercial power source 40a is forward conversion circuit 36 → the inverse transform circuit 37 → 2,3 winding output output transformer T ₂ through the primary side of the transformer T ₂ N ₂ , N ₃ , first, the high-frequency power (AC power) input to the secondary winding N ₂ side is supplied to the L of the secondary winding N ₂ .
When the secondary winding N ₂ resonance capacitor C ₃ connected in parallel to the C is, since being selected to resonate with the high frequency power of the input frequency to be input to the primary winding N ₁ side, secondary winding Line N
_The voltage output from ₂ resonates by the LC, and outputs the oscillating voltage to the rectifier circuit 50. Thus, the output transformer T _2, when configured to resonate with the input frequency of the secondary winding N ₂ side is the primary winding N ₁ side, the output is canceled leakage reactance component of the output transformer T ₂ is only becomes winding resistance component of the transformer T _2, as a result, the voltage drop due to the leakage reactance is eliminated,
It is possible to satisfactorily supply power to the load (heater 31).

[0025] The high-frequency power output from the secondary winding N ₂ of the output transformer T ₂ are, in rectifying and smoothing the direct current by the rectifier circuit 50, the toilet seat is supplied to the energizing circuit of the heater 31 2
Warm 1 Although the inductors Ra and Rb are interposed in the energizing circuit of the heater 31 as shown in FIG. 6, the inductors Ra and Rb have a low impedance with respect to a low-frequency power source and have a high impedance with respect to a high-frequency signal. Since the impedance is selected, the DC output can supply electricity to the heater 31 without any trouble. The power supplied to the tertiary winding N ₃ of the output transformer T ₂ is rectified to DC by the DC power supply circuit 55,
Further, the power is converted into a predetermined constant voltage power supply Vdd and supplied to each circuit of the second control system Y as an operation power supply.

Next, the temperature control of the toilet seat 21 will be described. The heating temperature of the toilet seat 21 is determined in advance by the temperature setting circuit 4.
Using the variable resistor VR provided in 5, the user sets the temperature at which the user feels comfortable when sitting. Therefore, by controlling the electric power supplied to the heater 31 of the toilet seat 21, the temperature of the toilet seat 21 can be adjusted to the reference temperature. That is, the toilet seat 21
Is the temperature of the temperature detection sensor 5 disposed near the heater 31.
2, and the detection signal (resistance value) is output to the resistance-frequency conversion circuit 53. The sensor 52 uses a thermistor whose resistance value decreases as the temperature of the toilet seat 21 increases. The resistance value detected by the thermistor is converted into a frequency by the conversion circuit 53, and the modulation circuit 54
And outputs a pulse signal corresponding to the frequency. When the detection signal of the temperature of the toilet seat 21 is converted into a frequency and input, the modulation circuit 54 changes the frequency of the carrier output from the modulation circuit 54 by the input signal (FM modulation), and outputs a high-frequency signal corresponding to the temperature of the toilet seat. output to the primary winding F ₁ of the signal transformer T _3. At this time, when the seat is not seated on the toilet seat 21 (hereinafter referred to as non-seat), since the seat detection signal is not output from the seat detection circuit 51, the signal transformer T
₃ , only the temperature information of the toilet seat 21 is input as a high-frequency signal.

The signal transformer T ₃ is an output transformer T ₂
Similarly, the primary winding F ₁ side is housed in the seat 21 and, 2
Although winding F ₂ side are accommodated in separated respectively in the control box 23, by the seat 21 is nono on toilet bowl 22, since the magnetic coupling is made good, the toilet seat temperature Smoothly convert the corresponding high-frequency signal to the primary winding F
It can be transmitted (supplied) to _two sides. That is, the toilet seat temperature information is stored in the second using the magnetic coupling of the signal transformer T ₃ effectively.
From the control system Y to the first control system X.

The high-frequency signal transmitted to the primary winding F ₂ of the signal transformer T ₃ is used as it is in the frequency-voltage conversion circuit 3.
8 and is converted to a DC output voltage R and input to an inverting terminal of an error amplifier 46 which is a main part of the control circuit 44 in the inverse conversion circuit 37. On the other hand, the error amplifier 4
6, a reference voltage V corresponding to the reference temperature set by the temperature setting circuit 45 is always input. The error amplifier 46 compares the two voltages RV, and outputs an output when R <V. The output voltage from the end decreases, and when R> V, the output voltage increases and the PWM-I in the conduction control circuit 44 respectively increases.
Input to C. When the voltage output from the error amplitude unit 46 falls, an output for increasing the PWM control ratio (increase the ON ratio of the switching elements 41 and 42) is sent from the output terminal of the conduction control circuit 44 to the inverter circuit 43. It has been increases the supply power of the output transformer T _2, increases the amount of electricity supplied to the heater 31 to set the heating temperature of the toilet seat 21 to the reference temperature. When the voltage output from the error amplifier 46 rises, an output for decreasing the PWM control ratio (decreasing the ON ratio of the switching elements 41 and 42) is output from the output terminal of the conduction control circuit 44 to the inverter circuit 43. by suppressing the amount of electricity supplied to the heater 31 to reduce power supplied to the output transformer T _2, it is intended to maintain the seat 21 to the set temperature. As described above, in the present invention, both the output transformer T ₂ as a means for supplying power to the heater and the signal transformer T ₃ for information transmission are provided on the control box 23 side and the toilet seat 21 side.
The power supply to the heater 31 and the control means for the supplied power can be electrically connected without specially providing a power supply and a signal transfer means by wire such as a cord. Can be connected to, for example, the toilet seat 21
Can be washed with water without being electrically restricted by the control box 23.

Next, the seat detection function of the toilet seat device of the present invention will be described. In FIG. 2, the user P
When the user sits on the toilet seat 21 for replenishment, the capacitance between the electrodes A and B in the energization circuit of the heater 31 increases sharply compared to before sitting due to the capacitance of the human body (that is, before the seating). Since only air exists between the electrodes A and B, the capacitance between the electrodes A and B is extremely low.
Since 0% is composed of moisture, the electrodes A,
The capacitance between B increases dramatically. ), Whether the resonance frequency determined by the capacitance between the electrodes A and B and the inductance L of the resonance coil 58 matches the oscillation frequency of the high-frequency signal output from the oscillator 57 to the secondary side of the high-frequency transformer 56 Or close to each other, a large resonance current flows through the energization circuit of the heater 31, and the voltage (AC output) across the resonance coil 58 rapidly increases. The AC output is rectified and smoothed by the detection circuit e, 59 is input as the detection voltage Vt. On the other hand, the comparator 59 receives the reference voltage Vs from the reference voltage setting circuit d.
The comparator 59 compares the two voltages Vt and Vt and finds that Vs <V
In the case of t (at the time of sitting), the seating detection circuit 51 switches to the modulation circuit 5
4 outputs an "H" level signal, that is, a seating detection signal.

The modulation circuit 54 changes the amplitude of the carrier wave (AM modulation, the amplitude of which increases when seated) in response to the input of the seating detection signal, and changes the high frequency corresponding to the toilet seat temperature detection signal already input to the modulation circuit 54. in a state of being mixed with the signal, together with the high-frequency signal corresponding to the AM modulated seating detection signal, and outputs to the primary winding F ₁ side of the signal transformer T _3. The secondary winding F ₂ side of the signal transformer T _3, 2 types of high-frequency signal input to the primary winding F ₁ side is outputted is transmitted as it is. The signal transformer T
2 winding toilet seat temperature information and the seating detection information output from the F ₂ of _3, detected by a detection circuit provided in the seating signal generation circuit 39 (in this case, high-frequency signal with the carrier wave is amplitude change (seating detection (Information) The corresponding high-frequency signal (toilet seat temperature information) obtained by changing the frequency of the carrier is output to the frequency-voltage conversion circuit 38 without detection. Only the modulated signal, that is, the high-frequency signal corresponding to the seating detection information is detected, and its DC output (output voltage) is input to the comparator 47. On the other hand, the reference voltage has already been input to the comparator 47, and the output voltage and the reference voltage are compared (the reference voltage is set lower than the output voltage generated by sitting), and the reference voltage <the output voltage In the case of (1) (when seated), a signal of “H” level is output from the output end of the comparator 47, and it is determined that the user is seated on the toilet seat 21. As a result, after the addition, the user P operates the cleaning switch S shown in FIG.
By inputting ₁ , since the seating detection signal is output from the seating signal generation circuit 39 to a switch operation circuit (not shown), the solenoid valve 26 is opened immediately, and the washing water is allowed to flow into the heating device 25. It is heated to a suitable temperature and is jetted out of the nozzle 29 to clean the user locally. To cancel the washing, the electromagnetic valve 2 when put stop switch S ₄
6 is cut off, and the solenoid valve 26 closes to prevent washing water from flowing into the heating device 25.

Next, after the user P has completed the addition, the toilet seat 21
If the user moves away from the toilet seat or carelessly rises from the toilet seat 21, the capacitance between the electrodes A and B is extremely lower than when the user is seated.
Since the resonance frequency determined by the inductance 8 and the oscillation frequency output from the oscillator 57 are largely different from each other and do not coincide with each other, the voltage generated at both ends of the resonance coil 58 becomes extremely low. That is, since the input to the comparator 59 of the seating detection circuit 51 satisfies the relationship of Vs> Vt, the seating detection circuit 51 does not output a seating detection signal. That is, since the seating detection information is not output from the second control system Y to the first control system X, in this case, even when the cleaning switch S ₁ accidentally turned, the solenoid valve 26 is not opened, the nozzles 29 Does not squirt warm water. As a result, as long as the body is not seated on the toilet seat 21, even if the washing switch S ₁ is turned on, hot water does not squirt even if the washing switch S ₁ is turned on. Not at all.

[0032]

According to the present invention, as described above, the heater
Output transformer as a means of supplying power to
Signal transformer for both the control box side and the toilet seat
The heater for toilet seat heating is provided separately from the side.
Power supply means, and the power supply and seating on the toilet seat.
The transmission means of the signal for detecting non-seating
Special provision of power and signal carrying means for wired
In addition, the configuration is such that it can be electrically connected, so that the following effects can be obtained . (1) The means for energizing the heater of the toilet seat is like a connection cord .
And configured to be energized without using a wired means
Therefore , it is easy to remove the toilet seat from the control box and wash it with water, and the toilet seat can be quickly and reliably cleaned. (2) The transmission unit of the power supply and control signals are placed individually in a separated state output transformer and a signal transformer and each divided into two parts to control box side and seat side
With such a configuration , the magnetic coupling can be easily attached and detached, so that when the toilet seat is removed from the control box during cleaning or when the toilet seat is erected, the power supply does not need to be specifically shut off. The power to the heater is automatically stopped
Since it is, also it is energy-saving of power consumption can be reduced
Thus, since the toilet seat side is provided with the seating detection means, as described above, it is possible to eliminate discomfort and the like caused by unexpected ejection of warm water caused by accidentally turning on the cleaning switch when cleaning the toilet seat or the like. There is also the advantage that it can be done.

[Brief description of the drawings]

FIG. 1 is a plan view showing a toilet seat device of the present invention.

FIG. 2 is a perspective view showing a use state of the present invention.

FIG. 3 is a side view showing a main part of the present invention.

FIG. 4 is a vertical sectional view of an output transformer.

FIG. 5 is a vertical sectional view of a signal transformer.

FIG. 6 is an electric circuit diagram schematically showing a control device used for the toilet seat device of the present invention.

FIG. 7 is a schematic side view of a toilet seat showing an embodiment in which a conventional toilet seat device is provided in a sanitary washing device.

FIG. 8 is a schematic plan view of FIG. 7;

[Explanation of symbols]

21 toilet seat 23 control box 25 the heating device 26 the solenoid valve 31 heater 36 forward conversion circuit 37 inverse transform circuit 39 primary winding of the seating signal generating circuit 50 rectifying circuit 51 occupant detection circuit T ₂ output transformer T ₃ signal transformer N ₁ output transformer N ₂ output 2 winding N ₃ outputs secondary winding X first control system Y the second control system of the three-winding F ₁ signal transformer primary winding F ₂ signal transformer of the transformer of the transformer

────────────────────────────────────────────────── ─── Continuation of the front page Examiner Keiji Akagi (56) References JP-A-3-286728 (JP, A) JP-A-3-286729 (JP, A) JP-A-63-181728 (JP, A) 63-156538 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47K 13/30

Claims (2)

(57) [Claims] 1. A control box having a toilet seat pivotally supported so as to be openable and closable, comprising a power supply means for supplying power to a heater disposed in the toilet seat and a power supply control means for controlling the power supply means.
A second control system comprising a voltage resonance means for voltage-resonating the power supplied from the first control system and a means for converting the voltage-resonated power to a DC output is provided in the toilet seat. Output transformer for supplying power to the heater
Primary side of signal transformer and secondary side of signal transformer for transmitting control signal
Connected to the first control system and stored in the control box
And the secondary and tertiary sides of the output transformer and the signal transformer.
Connect the primary side to the second control system and store it in the toilet seat
And the first control system and the second control system are connected to the output transistor.
Energized by magnetic coupling of lance and signal transformer
A toilet seat device characterized in that the toilet seat device is connected to the toilet seat. 2. The control system according to claim 1, wherein said second control system includes a voltage resonance means and an electric power supply.
Means for converting pressure-resonant power to DC output and
Comprising seat detection means for detecting seating
And a first control system comprising: means for energizing the heater;
Detected by the energization control means and the seating detection means.
A seating signal for outputting a seating signal according to the detected signal
And a signal generating means.
Item 7. The toilet seat device according to Item 1 .