JPH0998911A - Stool seat with heating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a heater side from being energized by providing two lead wires for an electronic part connecting the main body of a shower toilet to a stool seat so that the entire circuit is shut off, if the lead wire to the heater side is disconnected. SOLUTION: This stool seat with heating equipment consists of a circuit for connecting a stool seat heater 1 to a band filter in series, a circuit for serially connecting a thermistor 4 for detecting the heating temperature of a heater 1 to a band filter with a band other than the band filter, an oscillation circuit 8 and a circuit for connecting a controller for controlling the energization of the heater to a power supply in parallel. Thus it is possible to control the state of energizing the heater by the controller 2 by detecting the electric signal value of a specified frequency component from the oscillation circuit 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heated toilet seat in which a heater is installed on the inner surface side of the toilet seat to warm the toilet seat for use.

[0002]

2. Description of the Related Art A heating toilet seat, in which a heater is installed on the inner surface side of the toilet seat so that the toilet seat can be warmed and used, usually has a circuit configuration as shown in FIG. That is, the heater 1, the controller 2, and the power supply 3 are connected in parallel,
A thermistor 4 installed near the heater 1 is electrically connected to the controller 2 to form a closed circuit.

A switching element 5 such as a triac whose ON / OFF is controlled by a controller 2 is connected in the middle of a circuit connecting the heater 1 and a power source. In this case, the heater 1 and the thermistor 4 are installed on the toilet seat, and the controller 2 and the switching element 5 are installed inside the shower toilet body or the like.

In a normal use state in which the heater 1 is performing proper heat generation operation, the thermistor 4 measures the temperature in the vicinity of the heater 1 and outputs the fact that it is appropriate to the controller 2 for switching. Element 5 keeps the circuit closed.

If the heater 1 abnormally generates heat from such a state for some reason, the thermistor 4 detects the temperature and informs the controller 2 that the heater 1 is abnormally generating heat. As a result, the controller 2 opens the switching element 5 to cut off the power supply to the heater 1.

[0006]

However, in the above conventional heating toilet seat, two lead wires of the heater 1 and two lead wires to the thermistor 4 are provided from the shower toilet body to the toilet seat side. Wiring is connected. Therefore, even if the lead wire on the heater 1 side is broken for some reason, the thermistor 4 can operate without the lead wire being broken, and immediately after the lead wire on the heater 1 side is broken. The temperature does not drop sharply. After the disconnection, the temperature of the heater 1 gradually decreases, and the thermistor 4 detects the temperature decrease.

Therefore, the thermistor 4 outputs an output signal to the controller 2 in the same state as when the heater 1 is operating normally. As a result, there is a problem that the power supply to the heater 1 side may be continued even if the lead wire on the heater 1 side is broken.

[0008]

SUMMARY OF THE INVENTION The present invention has been made by improving and removing the above-mentioned conventional problems, and has a total of two lead wires of electronic parts for connecting a shower toilet body and the toilet seat. By doing so, when the lead wire to the heater side is broken, the entire circuit is cut off, and the heating toilet seat is provided so that the heater side is not energized.

The means adopted by the present invention for solving the above-mentioned problems are a circuit in which a heater of a toilet seat and a band filter are connected in series, a thermistor for detecting the heat generation temperature of the heater, and the band filter. Is a circuit in which a circuit in which a band-pass filter having a different band is connected in series, an oscillation circuit, a controller for controlling energization of a heater, and a power supply are connected in parallel to form an electric circuit having a predetermined frequency component The heating toilet seat is characterized in that the energization state of the heater of the controller is controlled by detecting a signal value.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the embodiments of the invention shown in the drawings. The same reference numerals as in the conventional case are the same members. FIG. 1 is a diagram showing an electric circuit of a heated toilet seat according to an embodiment of the present invention. As shown in the figure, in this embodiment, a circuit in which the heater 1 of the toilet seat and the low-pass filter 6 are connected in series, a thermistor 4 that detects the heat generation temperature of the heater 1 and a high-pass filter 7 are connected in series. A circuit in which the oscillation circuit 8, the high-pass filter 9 and the voltage detector 10 are connected in series, a controller 2 for controlling energization of the heater 1, and an AC power source 3 are connected in parallel to form a circuit.

Then, the voltage detector 10 and the controller 2
Between the low-pass filter 11 and the switching element 5
Are connected in series, and a low-pass filter 12 is also connected between the high-pass filter 9 of the oscillation circuit 8 and the controller 2. The AC power supply 3 is 50 Hz or 6
The oscillation circuit 8 oscillates a high frequency of, for example, several KHz and superimposes it on the power supply voltage.

In the circuit thus constructed, in a normal use condition, the low-frequency AC power supply of 50 Hz or 60 Hz, the low-pass filters 12 and 6, the heater 1,
A closed circuit that passes through the low-pass filter 11 and the switching element 5 is formed to operate, and the heater 1 performs a predetermined heat generation operation. This warms the toilet seat to a specified temperature range,
Even in a low temperature environment such as in winter, the user does not feel the buttocks that are in direct contact with the toilet seat are cold and can use them comfortably.

On the other hand, the high frequency excited by the oscillation circuit 8 is
A closed circuit passing through the high-pass filters 9 and 7, the thermistor 4, and the voltage detector 10 is formed. Therefore, the thermistor 4 is operated by the high frequency power source and the toilet seat heater 1 is operated.
To detect the temperature near. When the temperature changes, the resistance value of the thermistor 4 changes, so that the value detected by the voltage detector 10 of the high frequency circuit changes. Therefore, the temperature of the toilet seat heater 1 can be controlled by detecting the change in the output value of the voltage detector 10. Controller 2
Controls the switching element 5 to be turned on and off in accordance with the output signal of the voltage detector 10, so that the toilet seat heater 1
Temperature control.

If the lead wire portion connecting the circuit of the shower toilet body and the circuit on the toilet seat side is disconnected from such a normal use state, the entire circuit is disconnected and the toilet seat heater 1 side There is no continuation of energization to.

Incidentally, the present invention is not limited to the above-described embodiment, but can be appropriately modified. For example, the frequency of the high frequency excited by the oscillator circuit 8 and the corresponding frequency band of the high-pass filters 7 and 9 are
It may be set arbitrarily. The change in the resistance value of the thermistor 4 can also be detected by measuring the current value of the high frequency circuit.

[0016]

As described above, in the present invention,
The circuit of the shower toilet body and the circuit on the toilet seat side are connected by two lead wires, and the detection signal of the thermistor that controls the temperature of the toilet seat heater is used by using the high frequency wave superimposed on the low frequency power supply. As a result, even if the circuit is connected with two lead wires, it is possible to energize the heater side.
It is possible to detect the temperature of the heater by the thermistor separately and simultaneously in the same wiring circuit.

Therefore, since the number of lead wires is reduced to two, the possibility of disconnection is reduced, and the material can be saved and the wiring connection work can be simplified. Further, when the lead wire is broken, the entire circuit becomes in a non-energizable state, so that energization to the heater side is immediately cut off, which is excellent in safety.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of a heated toilet seat according to the present invention.

FIG. 2 is an electric circuit diagram of a conventional heated toilet seat.

[Explanation of symbols]

1 ... Toilet seat heater 2 ... Controller 3 ... Power supply 4 ... Thermistor 5 ... Switching element 6, 11, 12 ...
Low-pass filter 7, 9 ... High-pass filter 8 ... Oscillation circuit 10 ... Voltage detector

Claims (1)

[Claims] 1. A circuit in which a heater of a toilet seat and a bandpass filter are connected in series, a circuit in which a thermistor for detecting a heat generation temperature of the heater and a bandpass filter having a band different from the bandpass filter are connected in series, and oscillation. The circuit, the controller that controls the energization of the heater, and the power supply are connected in parallel to form a circuit, and the energization state of the heater of the controller is controlled by detecting the electric signal value of the predetermined frequency component of the oscillation circuit. Heated toilet seat characterized by doing so.