JP3653999B2 - Local cleaning equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a local cleaning apparatus for cleaning a local part of a human body by ejecting cleaning water.
[0002]
[Prior art]
FIG. 3 shows a circuit configuration of a conventional local cleaning device, to which an electromagnetic valve 1 for supplying / stopping tap water, an electromagnetic valve control circuit 2 for driving and controlling the electromagnetic valve 1, and this apparatus are attached. A toilet seat heater 3 for heating a toilet seat (not shown) of the toilet bowl, a toilet seat heater control circuit 4 for driving and controlling the toilet seat heater 3, a hot water heater 5 for heating tap water used for local cleaning, and a hot water heater 5 comprises a microcomputer and a solenoid valve control circuit 2, a toilet seat heater control circuit 4, a hot water heater control circuit 6, and a cleaning water jetting mechanism (not shown). A control circuit 7 that controls the switch circuit 8 that transmits an operation input of a switch (not shown) operated by a user to the control circuit 7 and a level display such as a washing water temperature, a hot water temperature, and a toilet seat temperature. A display circuit 9 for performing, and a power supply circuit 10 'supplies a low DC voltage for operation, such as the control circuit 7.
[0003]
The power supply circuit 10 ′ includes a transformer T that steps down the commercial power supply AC, a diode bridge DB that full-wave rectifies the secondary voltage of the transformer T, a smoothing capacitor C0 that smoothes the pulsating output of the diode bridge DB, and a smoothing capacitor C0. And a three-terminal regulator RG for stabilizing the DC voltage supplied to the control circuit 7 by using the voltage between the two terminals as a power source, and stably supplying the operating DC low voltage to the control circuit 7 and the like.
[0004]
In the control circuit 7, for example, when a request (signal) to turn on the hot water heater 5 is input through the switch circuit 8, a control signal is output to the hot water heater control circuit 6, and the hot water heater control circuit 6 supplies the commercial power supply. The warm water heater 5 is energized from AC and the warm water heater 5 is turned on. Conversely, if a request (signal) for turning off the hot water heater 5 is input to the control circuit 7 through the switch circuit 8, the control signal for the control circuit 7 to turn off the hot water heater 5 to the hot water heater control circuit 6. Is output from the commercial power supply AC and the hot water heater 5 is turned off.
[0005]
Here, in order to control the hot water temperature by the hot water heater 5 and the toilet seat temperature by the toilet seat heater 3 to predetermined values, the warm water heater control circuit 6 and the toilet seat heater control circuit 4 are provided with switching elements such as a triac. Thus, the hot water temperature and the toilet seat temperature are detected by a temperature sensor or the like (not shown), and the control circuit 7 outputs a control signal for turning on / off the switching device to the hot water heater control circuit 6 and the toilet seat heater control circuit 4. By adjusting the conduction angle, the amount of heat generated by the hot water heater 5 and the toilet seat heater 3 can be varied to adjust the hot water temperature and the toilet seat temperature to desired values.
[0006]
[Problems to be solved by the invention]
By the way, in order to prevent the emission of interference noise when the hot water heater 5 and the toilet seat heater 3 are turned on and off, the switching element is generally turned on and off in synchronization with the zero cross point of the commercial power supply AC, and therefore the zero cross of the commercial power supply AC is detected. A zero-cross detection circuit 11 'is provided.
[0007]
This zero-cross detection circuit 11 'includes a transistor Q having a base connected to one end of an AC input end of the diode bridge DB via a resistor R6 and a collector connected to the power supply line of the control circuit 7 via a resistor R7. The zero cross detection signal is output to the control circuit 7 from the connection point between the collector of the transistor Q and the resistor R7.
[0008]
4A and 4B show signal waveforms of the respective parts. FIG. 4A shows the AC power supply voltage Vac of the commercial power supply AC, FIG. 4B shows the voltage V1 at the AC input terminal of the diode bridge DB, and FIG. The zero-cross detection signal Vx input from the zero-cross detection circuit 11 ′ to the control circuit 7, FIG. 6D shows the control signal V2 output from the control circuit 7 to the hot water heater control circuit 6, and FIG. AC voltage V3 applied to the hot water heater 5 through the hot water heater control circuit 6. Thus, when the AC input terminal of the diode bridge DB to which the resistor R6 is connected is at a high potential, the transistor Q of the zero-cross detection circuit 11 ′ is turned on in synchronization with the AC power supply voltage (FIG. The voltage Vx corresponding to the voltage drop at the resistor R7 is input to the control circuit 7 (see (c)). On the other hand, when the AC input terminal to which the resistor R6 of the diode bridge DB is connected has a low potential, the transistor Q is turned off, and the control circuit 7 is synchronized with the AC power supply voltage (the collector-emitter of the transistor Q). Saturation voltage) ≈ (ground potential of the control circuit 7) is input as the zero-cross detection signal Vx (see FIG. 10C). Then, the control circuit 7 outputs a control signal for turning on the switching elements of the hot water heater control circuit 6 and the toilet seat heater control circuit 4 so as to synchronize with the zero cross based on the zero cross detection signal Vx.
[0009]
However, in recent years, with the increasing penetration rate of local cleaning devices, there is a demand for simplification and cost reduction of the zero cross detection circuit of the local cleaning device.
[0010]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a local cleaning apparatus including a zero-cross detection circuit that is inexpensive and simple in configuration.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention provides a local cleaning apparatus for spraying cleaning water to clean local parts of a human body, and rectifying a cleaning water control means for controlling cleaning water ejection and a commercial AC power source. Rectifying means, a power supply means for creating a predetermined constant voltage from the pulsating flow output of the rectification means, a control means for receiving a power supply from the power supply means and operating to send a control signal to the cleaning water control means, And a zero-cross detecting means for detecting a zero-cross of the commercial AC power supply and outputting a detection signal to the control means. The zero-cross detecting means includes a rectifying element, a voltage dividing resistor and a constant voltage element to which the power supply voltage of the commercial AC power supply is applied. A zero-cross detection with an inexpensive and simple configuration comprising a series circuit of a rectifying element, a voltage dividing resistor and a constant voltage element is characterized in that a voltage divided by a voltage dividing resistor is used as a detection signal. It is possible to realize a circuit.
[0012]
The invention of claim 2 is characterized in that, in the invention of claim 1, the rectifying element of the zero cross detecting means is also used as the rectifying element constituting the rectifying means, further simplifying the circuit configuration and reducing the cost. Can do.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted.
[0014]
FIG. 1 shows a circuit configuration diagram of the present embodiment. A power supply circuit 10 and a zero-cross detection circuit 11 are different from the conventional example. As in the conventional example, the washing water control means and the control means are constituted by the control circuit 7 formed of a microcomputer.
[0015]
First, the power supply circuit 10 includes a first Zener diode ZD1 having a cathode connected to one end of the commercial power supply AC, a diode D1 serving as a rectifier having a cathode connected to the other end of the commercial power supply AC, and a first Zener diode ZD1. Resistors R1 to R3 connected in series between the anode of the diode D1 and the anode of the diode D1, and a smoothing capacitor C1 connected in parallel to the first Zener diode ZD1, and the AC power supply voltage of the commercial power supply AC is applied to the diode D1. The desired low voltage (zener voltage) is obtained from the pulsating voltage divided by the resistors R1 to R3 by the first Zener diode ZD1 and smoothed by the smoothing capacitor C1 to the control circuit 7. The DC low voltage to be supplied is obtained.
[0016]
On the other hand, the zero-cross detection circuit 11 includes a second Zener diode ZD2 having a cathode connected to one end of the commercial power supply AC, a diode D1 and a resistor R3 constituting the power supply circuit 10, and an anode and a resistor of the second Zener diode ZD2. Resistors R4 and R5 connected in series between the connection points of R2 and R3 are provided.
[0017]
Next, the operation of the zero cross detection circuit 11 in this embodiment will be described with reference to the waveform diagrams of the respective parts shown in FIG. 4A shows the AC power supply voltage Vac of the commercial power supply AC, and FIG. 4B shows the cathode potential of the Zener diode ZD2 (provided that the cathode potential of the first Zener diode ZD1 is a reference) Vz2. FIG. 4C shows a zero-cross detection signal Vx input from the zero-cross detection circuit 11 to the control circuit 7, FIG. 6D shows a control signal V2 output from the control circuit 7 to the hot water heater control circuit 6, and FIG. Is an AC voltage V3 applied to the hot water heater 5 from the commercial power source AC through the hot water heater control circuit 6.
[0018]
Thus, in the zero cross detection circuit 11, the AC power supply voltage Vac of the commercial power supply AC is also extracted by half-wave rectification using the rectifying element (diode D1) of the power supply circuit 10 and the pulsating voltage is generated by the resistors R3 to R5. The voltage is divided, and the AC component of the commercial power supply AC is input to the control circuit 7 as the zero cross detection signal Vx using the second Zener diode ZD2 (see FIG. 2C). It is necessary to set the Zener voltage of the second Zener diode ZD2 to a value that does not exceed the withstand voltage of the input port of the control circuit 7.
[0019]
Based on the zero cross detection signal Vx input from the zero cross detection circuit 11, a control signal V2 for turning on the switching elements of the hot water heater control circuit 6 and the toilet seat heater control circuit 4 is output so that the control circuit 7 is synchronized with the zero cross. It is.
[0020]
As described above, in this embodiment, the zero-cross detection circuit 11 is configured by a series circuit of the diode D1 to which the AC power supply voltage Vac of the commercial power supply AC is applied, the voltage dividing resistors R3 to R5, and the second Zener diode ZD2 that is a constant voltage element. Then, by using the voltage divided by the voltage dividing resistors R3 to R5 as the zero cross detection signal Vx, an inexpensive and simple configuration including a series circuit of the diode D1, the voltage dividing resistors R3 to R5, and the second Zener diode ZD2. The zero cross detection circuit 11 can be realized. Further, if the rectifying element is also used as the diode D1 of the power supply circuit 10 as in the present embodiment, there is an advantage that the circuit configuration can be further simplified and the cost can be reduced by the combined use of the electronic components constituting the circuit. is there.
[0021]
【The invention's effect】
According to a first aspect of the present invention, there is provided a local cleaning apparatus that jets cleaning water to clean a local part of a human body, a cleaning water control unit that controls ejection of cleaning water, a rectifying unit that rectifies commercial AC power, and a rectifying unit. Power supply means for creating a predetermined constant voltage from the pulsating current output, control means for receiving a power supply from the power supply means, operating to send a control signal to the washing water control means, and detecting a zero cross of the commercial AC power supply A zero-cross detection means for outputting a detection signal to the control means, and this zero-cross detection means comprises a series circuit of a rectifying element, a voltage dividing resistor and a constant voltage element to which a power supply voltage of a commercial AC power supply is applied, Since the voltage divided by the voltage resistor is used as a detection signal, the zero-cross detection circuit can be realized with a low-cost and simple configuration including a series circuit of a rectifying element, a voltage dividing resistor and a constant voltage element. A.
[0022]
According to the second aspect of the present invention, since the rectifying element of the zero cross detecting means is also used as the rectifying element constituting the rectifying means, the circuit configuration can be further simplified and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic circuit diagram of an embodiment.
FIG. 2 is a signal waveform diagram of each part in the above.
FIG. 3 is a schematic circuit diagram of a conventional example.
FIG. 4 is a signal waveform diagram of each part in the above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Solenoid valve 2 Solenoid valve control circuit 3 Toilet seat heater 4 Toilet seat heater control circuit 5 Hot water heater 6 Hot water heater control circuit 7 Control circuit 10 Power supply circuit 11 Zero cross detection circuit

Claims (2)

In a local cleaning apparatus that jets cleaning water to clean a local part of a human body, a predetermined amount is determined based on a cleaning water control unit that controls ejection of cleaning water, a rectifying unit that rectifies commercial AC power, and a pulsating flow output of the rectifying unit. Power supply means for generating a voltage, control means for receiving a power supply from the power supply means and operating to send a control signal to the cleaning water control means, and detecting a zero cross of the commercial AC power supply to the control means A zero-cross detecting means for outputting, the zero-cross detecting means comprising a series circuit of a rectifying element, a voltage dividing resistor and a constant voltage element to which a power supply voltage of a commercial AC power supply is applied, and divided by the voltage dividing resistor. A local cleaning apparatus characterized in that a voltage is used as a detection signal. 2. The local cleaning apparatus according to claim 1, wherein the rectifying element of the zero cross detecting means is also used as a rectifying element constituting the rectifying means.

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