JP4453324B2 - Heating toilet seat - Google Patents

Description

  The present invention relates to heater control of a quick-warm heating toilet seat that heats a toilet seat in a short time.

In this type of conventional heated toilet seat, as shown in FIG. 12, the seat portion 103 of the toilet seat 102 having a hollow portion 101 is made of a transparent polypropylene resin, and the radiant heat from the lamp heater 104 is quickly transmitted to the seat surface for heating. The surface was quickly heated. Further, the temperature control of the heater is performed by a thermostat 105 placed in the vicinity of the lamp heater 104, and the temperature fuse 106 prevents the danger of abnormal heating (see Patent Document 1).
JP 2000-14598 A

  However, the resistance value of the lamp heater 104 is as small as 1/10 or less of the rated power consumption when the filament is cooled, and a large inrush current flows at the beginning of energization. Of course, the resistance value of the filament reaches the rated resistance in a short time and the inrush current is immediately suppressed, but due to the nature as a toilet seat heater, it is repeatedly turned on and off even if the energization time is short. . For this reason, there is a concern that the life of the filament is shortened compared to continuous lighting. Although safety devices such as the thermostat 105 and the thermal fuse 106 are installed, when the thermostat 105 and the thermal fuse 106 are activated because the temperature rise of the lamp heater 104 is fast, the temperature of the seating portion 103 of the toilet seat 102 is already set. There was a concern that was too hot.

In order to solve the above problems, the present invention provides a toilet seat cavity formed therein, and La Npuhita installed in the cavity, a first resistor connected to said lamp heater in series, A second resistor connected in series with the lamp heater and having a resistance value smaller than that of the first resistor, a thermistor installed in the vicinity of the lamp heater , a voltage of the thermistor and a set voltage are compared, and the lamp A comparator for detecting a temperature in the vicinity of the heater; a first delay circuit having an output of the comparator connected to an input terminal and having a first delay time; and a second delay time larger than the first delay time. A microcomputer having a second delay circuit connected to an output terminal; a first relay that operates in accordance with an output of the first delay circuit; and a second that operates in accordance with an output of the second delay circuit. No And a third relay that operates in accordance with the output of the microcomputer. When a signal for starting energization is output from the microcomputer, the first and the third are within the first delay time period. A power supply voltage is supplied to the lamp heater via the first resistor by the relay, and the second and third relays are in a period from immediately after the first delay time to the second delay time. A heating toilet seat that supplies the power supply voltage to the lamp heater via the second resistor and supplies the power supply voltage directly to the lamp heater by the third relay after the second delay time . a certain time when energized rise immediately after being energized lamp heater, by connecting a resistor to the lamp heater in series to suppress the rush current, when the resistance value of the filament has been increased with the energized series resistance And Rashi, the supply voltage is applied to the rated to the filament of the lamp heater. By doing this, it is possible to prevent the lamp heater from being destroyed by the inrush current, and to avoid a steep rise in the ambient temperature around the heater, so that the follow-up delay associated with the time constant of the safety device can be suppressed, It is also possible to improve safety.

  The present invention heats the toilet seat with a lamp heater installed in the toilet seat, prevents inrush current by inserting a resistor in series when the lamp heater rises, and prolongs the life of the lamp heater. As a result, it is possible to avoid a steep rise in the ambient temperature, so that it is possible to suppress the follow-up delay due to the time constant of the thermistor, improve safety, and realize a heat-saving and comfortable heating toilet seat. Is possible.

First invention comprises a toilet seat cavity formed therein, and La Npuhita installed in the cavity, a first resistor connected to said lamp heater in series, is connected to the lamp heater in series A second resistor having a resistance value smaller than that of the first resistor, a thermistor installed in the vicinity of the lamp heater , and a comparator for comparing a temperature of the thermistor and a set voltage to detect a temperature in the vicinity of the lamp heater. A first delay circuit having an output terminal of the comparator connected to an input terminal and having a first delay time, and a second delay circuit having a second delay time larger than the first delay time. A microcomputer connected to the output terminal, a first relay that operates in accordance with the output of the first delay circuit, a second relay that operates in accordance with the output of the second delay circuit, and the output of the microcomputer In A first relay that operates, and when a signal for starting energization is output from the microcomputer, the first resistor and the third relay are used for the first resistor during the first delay time period. A power supply voltage is supplied to the lamp heater through the second resistor and the second and third relays pass through the second resistor during a period from immediately after the first delay time to the second delay time. Supplying the power supply voltage to the lamp heater, and the second delay time.
After this is a heating toilet seat that directly supplies the power supply voltage to the lamp heater by the third relay , and a resistor is connected in series with the lamp heater for a certain time at the time of energization immediately after the lamp heater is energized. When the current is suppressed and the resistance value of the filament increases with energization, the series resistance value is reduced and the rated power supply voltage is applied to the filament of the lamp heater. By doing in this way, destruction of the lamp heater due to inrush current can be prevented, the follow-up delay associated with the time constant of the safety device can be suppressed, and safety can be improved.

Further, with the elapsed time after the start of energization, because varying the series resistance in accordance with the magnitude of the inrush current allows current control does not become more filaments burden.

In the second invention, in particular, the thermistor of the first invention is such that the heat sensitive part is covered with a glass coating, and the thermal time constant is made smaller than that of the resin mold, so that the temperature of the lamp heater is reduced. Ru can be immediately detected a sudden change.

A third invention is, in particular, the lower portion of the first or lamp heater of the second aspect of the invention, which has established a reflecting mirror having a thermistor on the surface, Ru can be detected controlling the temperature of a reflective mirror surface .

A fourth invention is, in particular, those having a third reflecting mirror rotating means for the reflecting mirror Ru is rotated to the lower and upper part of the lamp heater of the present invention, shielding the spokes Inetsu reflector is rotated Ri, Ru it is possible to prevent abnormal heat generation.

A fifth invention is, in particular, anti Ikyo of the fourth invention has Chigae the distance from the lamp heater to the reflecting mirror surface at the time located in the lower part of the case and a lamp heater that is located above the lamp heater , blocks the thermal radiation in the vicinity of more lamp heater, Ru can suppress the temperature rise.

A sixth invention is particularly, the anti Ikyo surface of the fourth invention is obtained by installing a thermal fuse, Ru can be improved further safety.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

( Reference Example 1)
FIG. 1 is a circuit configuration diagram of a heating toilet seat in Reference Example 1 of the present invention, and FIG. 2 is a timing chart of control output of the heating toilet seat circuit.

In FIG. 1, the lamp heater 1 is supplied with a voltage from an AC 100 V power source, and the relay 2 N
. O. It is energized by closing the contact. Further, the relay 3 as the intermittent means is N.P. O. When the contact is closed, the resistor 4 is connected in series with the lamp heater 1 and N.I. C. When the contact is closed, the resistor 4 is disconnected from the lamp heater 1.

  The opening and closing of the contacts of the relay 2 and the relay 3 is executed by exciting the coil 6 and the coil 7 of the relay 2 and the relay 3 with the output from the OUT terminal of the microcomputer 5. When an energization start signal is output from the microcomputer 5, the signal is delayed by the delay circuit 8, and the output is inverted by the inversion circuit 9 and input to the base of the NPN transistor 10. On the other hand, a signal from the OUT terminal of the microcomputer 5 is input to the base of the NPN transistor 11. N. of relay 2 O. When the contact is closed, relay 3 is N.P. O. The contact is closed, and 100 V is applied while the lamp heater 1 and the resistor 4 are connected in series. Therefore, the current flowing through the lamp heater 1 is regulated by the resistor 4 and the inrush current is suppressed. Thereafter, when the time defined by the delay circuit 8 has elapsed (0.5 seconds shown in FIG. 2), the N. C. The contact is closed, the resistor 4 is bypassed, and AC 100 V is applied to the lamp heater 1. However, at that time, the filament of the lamp heater 1 is overheated by the current flowing through the resistor 4, and the resistance value of the filament is increased, so that a large inrush current does not flow even if the resistor 4 is disconnected. Thereafter, when the thermistor 12 receives the heat of the lamp heater 1 and the temperature rises, the resistance value decreases and the voltage at the + terminal of the comparator 13 increases. When the voltage at the + terminal exceeds the set voltage 14 at the − terminal, the HIGH voltage increases. Is output to the IN terminal of the microcomputer 5. When the HIGH voltage at the IN terminal is detected, the OUT signal becomes LOW, and as a result, the N. O. The terminal opens and the application of AC 100 V to the lamp heater 1 stops (FIG. 2 shows that the energization command from the microcomputer 5 was 3 seconds).

  With the above configuration, the inrush current of the lamp heater 1 is suppressed, and the life of the lamp heater 1 can be extended. Further, by suppressing the current by connecting the resistor 4 in series when the lamp heater 1 is started up, the rapid rise in the temperature near the lamp heater 1 can be suppressed, and the reaction delay time due to the thermal time constant of the thermistor 12 is also shortened. Therefore, the follow-up delay can be suppressed and the safety can be improved.

(In the form of implementing state 1)
Figure 3 is a circuit diagram of a heating toilet seat in the form state 1 of the present invention, FIG. 4 is a timing chart of the control output of the circuit of the toilet seats. The difference from the reference example 1 is that the relay 16 is configured so that the resistor 16 (the resistance value is smaller than the resistor 4) enters the lamp heater 1 in series after the resistor 4 is disconnected. A signal from OUT of the microcomputer 5 passes through the second delay circuit 17 (delay time 0.8 seconds), and excites the coil 20 of the relay 15 through the inverting circuit 18 and the NPN transistor 19. N. of relay 3 C. A resistor 16 is connected in series with the lamp heater 1 via a contact (FIG. 4 shows that the energization command from the microcomputer 5 was 3.2 seconds).

  With the above configuration, the current flowing through the lamp heater 1 can be controlled more finely, and the burden on the filament is reduced. With this configuration, the life of the lamp heater 1 can be further extended.

(Form state to the second embodiment)
Figure 5 is a circuit diagram of a timer means in the form state 2 of the present invention. The step signal input from the input terminal charges the capacitor 22 of the CR charging circuit 23 composed of the capacitor 21 and the resistor 22, and becomes the + terminal input of the comparator 25. The comparison voltage 24 is input to the negative terminal of the comparator 25. When the positive terminal voltage exceeds the negative terminal voltage, the output terminal of the comparator 25 is delayed from the step input by a delay time determined by the CR time constant. A signal is output. The delay time can be arbitrarily selected depending on the combination of the capacity of the capacitor 21 and the size of the resistor 22, and an optimum constant can be selected for suppressing the inrush current of the lamp heater 1.

(Form state to the third embodiment)
6 is a cross-sectional view of the thermistor in the form state 3 of the present invention. Thermistor 12 is covered with heat-sensitive part 26 with a thin glass heat resistant 27, the thermal time constant than the resin mold by a small fence, can be transmitted as a variation of the quick resistance variations in ambient temperature . A time constant of 1 to 2 seconds is an essential speed for reliably capturing a rapid change in the temperature of the lamp heater 1.

(Form state to the fourth embodiment)
Figure 7 is a cross-sectional view of a heating toilet seat in the form state 4 of the present invention.

At the bottom of the lamp heater 1 is installed at the reflecting mirror 29, it is reflected by the seating surface 30 of the radiation heat of the lamp heater 1. A thermistor 12 is installed on the reflecting mirror to control the temperature by receiving heat from the lamp heater 1. By the thermistor 12 placed in the lamp heater 12 near on the reflecting mirror 29, and Ji directly sense the radiant heat increases the detection sensitivity of the thermistor 12, increases the accuracy of the temperature control.

(Form state fifth embodiment)
Figure 8 is a block diagram of a heating toilet seat in the form status fifth embodiment of the present invention.

  In addition to the reflecting mirror 29, a movable reflecting mirror 31 is attached to a shaft 33 of a motor 32 which is a reflecting mirror rotating means, and the rotation of the shaft 33 can prevent the lamp heater 1 from radiating to the seating surface 30. Thus, it is possible to protect the safety of the seated person even when the temperature of the seating surface 30 is excessively increased due to the malfunction of the control of the lamp heater 1.

(In the form state the sixth embodiment)
Figure 9 is a block diagram of a heating toilet seat in the form state 6 of the present invention. The difference between this embodiment and the form status fifth embodiment is that the center of rotation of the movable reflector 31 is located below the center of the lamp heater 1. With this configuration, when the movable reflecting mirror 31 is rotated upward, the heat radiation is reflected near the lamp heater 1, and a further shielding effect can be obtained.

(In the form state the seventh embodiment)
Figure 10 is a block diagram of a heating toilet seat in the form status seventh embodiment of the present invention.

  A temperature fuse 34 is installed on the surface of the movable reflecting mirror 31, and when the movable reflecting mirror 31 approaches the lamp heater 1, it receives heat radiation more strongly and the temperature fuse 34 opens the circuit. Yes. With this configuration, it is possible to protect the safety of the seated person even when the temperature of the seating surface 30 is excessively increased due to the malfunction of the control of the lamp heater 1.

( Reference Example 2 )
FIG. 11 is a configuration diagram of a heating toilet seat in Reference Example 2 of the present invention.

  When a human body is detected by the CCD camera (human body detection means) 35, the signal enters the microcomputer 5 and the lamp heater 1 inside the seating surface 30 is energized. The temperature of the lamp heater 1 is controlled by a thermistor 12 (not shown). According to this configuration, when the person is not in the toilet, the lamp heater 1 is not energized. When the human body is detected, the lamp heater 1 is energized immediately. Therefore, a heated toilet seat having both energy saving and comfort can be realized. It becomes possible.

  As described above, the heating toilet seat according to the present invention can realize an energy-saving and comfortable heating toilet seat, and can be applied to a quick-heating heating toilet seat.

The circuit block diagram of the heating toilet seat in the reference example 1 of this invention Timing chart of the control circuit of the heating toilet seat Circuit configuration diagram of a heating toilet seat in the form state 1 of the present invention Timing chart of the control circuit of the heating toilet seat Circuit diagram of the timer means in the form state 2 of the present invention Sectional view of the thermistor in the form state 3 of the present invention Sectional view of the toilet seats in the form state 4 of the present invention Diagram of toilet seats in the form status fifth embodiment of the present invention Diagram of toilet seats in the form state 6 of the present invention Diagram of toilet seats in the form status seventh embodiment of the present invention The block diagram of the heating toilet seat in the reference example 2 of this invention Configuration diagram of a conventional heated toilet seat

DESCRIPTION OF SYMBOLS 1 Lamp heater 2, 3 Relay 4, 15 Resistance 8 Delay circuit 12 Thermistor 23 Charging circuit 29 Reflective mirror 31 Movable reflective mirror 32 Motor (reflecting mirror rotation means)
34 Thermal fuse 35 CCD camera (human body detection means)

Claims (6)

A toilet seat with a cavity inside,
And La Npuhita installed in the cavity,
A first resistor connected in series with the lamp heater;
A second resistor connected in series with the lamp heater and having a resistance value smaller than that of the first resistor; and a thermistor installed in the vicinity of the lamp heater ;
A comparator that detects a temperature near the lamp heater by comparing a voltage of the thermistor with a set voltage;
An output terminal having a first delay circuit having an output terminal connected to an input terminal and having a first delay time and a second delay circuit having a second delay time larger than the first delay time A microcomputer connected to the
A first relay that operates in accordance with an output of the first delay circuit;
A second relay that operates in accordance with the output of the second delay circuit;
A third relay that operates according to the output of the microcomputer;
When an energization start signal is output from the microcomputer, a power supply voltage is supplied to the lamp heater via the first resistor by the first and third relays during the first delay time period. The power supply voltage is supplied to the lamp heater via the second resistor by the second and third relays in a period from immediately after the first delay time to the second delay time, A heating toilet seat that directly supplies the power supply voltage to the lamp heater by the third relay after the second delay time . The heating toilet seat according to claim 1, wherein the thermistor has a heat sensitive part covered with a glass coating . The heating toilet seat according to claim 1, wherein a reflecting mirror having the thermistor on a surface thereof is installed at a lower portion of the lamp heater. Heating seat according to claim 3 having a reflecting mirror rotation means Ru is rotated the reflector at the bottom and top of the lamp heater. The heating toilet seat according to claim 4, wherein the distance from the lamp heater to the reflecting mirror surface is different between when the reflecting mirror is located above the lamp heater and when located below the lamp heater. Heating seat according to claim 4, the thermal fuse was placed on the surface of the front Symbol reflector.

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