JPH0754008B2 - Sanitary washing equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary washing device for washing local parts of a human body sitting on a toilet seat with washing water.

2. Description of the Related Art Generally, a sanitary washing device has a structure as shown in FIGS. That is, 16 is a cleaning nozzle that discharges cleaning water to the portion to be cleaned of the user sitting on the toilet seat 15, and 18 is a toilet 17
A cistern for storing water for cleaning the inside, 19 is a pump motor for sucking water from the cistern 18, 20 is a tank for storing water from the cistern 18 by the pump motor 19, 21 is water in the tank 20 22 is a main body for heating the heater to an appropriate temperature.

Next, the conventional electronic control circuit for controlling the pump motor 19 and the heater 21 having the above-described configuration has the configuration shown in FIG. In other words, AC power supply 13
It is rectified and smoothed by 24 and further stepped down to obtain the power supply voltage of the microcomputer 25. By the AC power supply 23,
Zero cross point is detected by detecting the zero volt point of the AC power supply.
The zero-cross pulse is generated by the zero-cross pulse generation circuit 31 which generates a pulse.
Enter 25. The microcomputer 25 detects the rising edge of the zero-cross pulse and, as an interrupt signal, based on this signal, a gate trigger pulse to the triac 27 for driving the heater during a half cycle of the AC power supply. A signal is sent to the triac 27
And the heater 21 is energized. Similarly, a triac 28 for driving the pump / motor 19 is also provided.
A gate / trigger signal is sent to the triac 27 so that the pump motor 19 is driven, and hot water is applied to the human body part after defecation to wash the part.

Problems to be Solved by the Invention However, in the electronic control circuit in the conventional sanitary washing device, when the zero cross pulse generating circuit 31 fails, or when the AC power supply 23 drops,
Occasionally it was difficult to generate cross pulses. For example, even if the AC waveform is as shown in FIG. 8a, when the zero cross pulse is kept Hi as shown in FIG. 8b, the gate voltage from the microcomputer 25 is changed. The trigger pulse remains Hi as in FIG. 8c, the triac 27 becomes conductive and the heater 21 remains energized as shown in FIG. 8d. That is, as shown in FIG. 4 and FIG. 9, a zero cross pulse is first applied to the microcomputer after the power supply voltage is turned on.
After inputting 7 to 25 and judging 8 whether it is 50 Hz or 60 Hz, the control routine is entered and the rising edge of the zero cross pulse is detected 9 and 10 and the gate trigger pulse is output and the 11 1 after detecting the rising edge of the cross pulse
2. It had 14 configurations that turned off 13 gate trigger pulses after about 300 μS.

This is because the gate trigger pulse must be lengthened in order to fully draw the latching current as a trigger condition for the triac 12. Therefore, if the zero-cross pulse remains from Lo to Hi, the falling edge of the zero-cross pulse cannot be detected and the heater gate trigger pulse remains at Hi. And the hot water heater remains on. As a result, the hot water in the tank 6 boils and becomes extremely dangerous.

In view of the above problems, it is an object of the present invention to provide a safe sanitary washing device.

Means for Solving the Problems In order to solve the above problems, the present invention has achieved a certain period of time without the zero cross pulse being fixed to the Hi output or the Lo output and being normally input to the control circuit unit. Sometimes, the control circuit section is initialized.

Effect According to the present invention, when the zero-cross pulse generating circuit fails and the zero-cross pulse is fixed at the Hi output or the Lo output, the control circuit unit is operated after a certain time delay due to the above configuration. Since it is configured to be initialized, the signal to the power control means such as the heater that is output in synchronization with the zero-cross pulse is turned on, and it is possible to suppress the state in which the triac remains on. It is possible to provide a sanitary washing device that is highly safe.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the frequency of the AC power supply is 50 Hz or 60 Hz by using the zero cross pulse from the AC power supply 23 and the zero cross pulse generator 34 that generates a pulse synchronized with the zero volt point of the AC power supply. Is determined by the frequency determination unit 36. Next, through the pulse input determination unit 37 that determines whether or not the zero-cross pulse is normally generated, the motor control unit 38, the heater control unit 39, the display control unit 40, and the switch detection unit 41 set an appropriate temperature. Wash the user's local area with warm water. Then, these controls are completed for all half cycles of the power supply frequency, and the pulse input determination unit 37
The zero cross pulse input is determined by and if there is no abnormality, the load is controlled again in each control unit. If the zero cross pulse is abnormal, go to the delay determination unit 36,
In the delay determination unit 37, for example, when the abnormality continues for 500 msec, the system reset unit resets the entire system. When the delay determining unit 37 returns the zero-cross pulse input within 500 msec, the control unit controls each load again.

The details will be described below with reference to FIGS. 1, 3, 6, and 7.

FIG. 2 is a schematic flowchart of the present invention. After the power is turned on, the zero cross pulse generation circuit detects the zero volt of the AC power supply and generates a zero cross pulse. After that, input this zero cross pulse 1
Then, depending on how many zero cross pulses are present in 100 mS, for example, it is judged whether the frequency is 50 Hz or 60 Hz, and the control routine is entered. In the control routine, it is judged whether or not the rising edge and the falling edge of the zero-cross pulse are present within a certain time, and if the zero-cross pulse is normally input, the control process 5 is transferred. , The operation circuit is received by the switch circuit 30 shown in FIG. 7, the operation mode is displayed, and the gate trigger pulse for driving the heater 21 is detected by detecting the hot water temperature in the tank 20. Judge whether to output or not. If the temperature of the hot water is lower than the set temperature and the heater 21 must be energized, the gate trigger pulse is output 6.
After that, again as shown in 3, it is judged whether the zero-cross pulse is normally input, and this control routine is repeated. However, if the zero-cross pulse generation circuit 31 shown in FIG. 6 fails and is fixed to the Hi side as shown in FIG.
After confirming that the Hi state continues for 0 mS, the program returns to the initial state 4 of the program as shown in the flowchart of FIG.
Therefore, as shown in Fig. 3c, the gate trigger pulse is 500m after the zero cross pulse is fixed to Hi.
No output occurs after S, and the heater 21 is no longer energized as shown in FIG. 3d. Now, let us explain that we are monitoring for zero cross pulses for 500 mS. When an instantaneous power failure occurs and the power supply and voltage drop for a certain period of time, it becomes difficult to generate a zero cross pulse. However, in the case of a momentary power failure within 500 mS, the zero cross pulse will return midway. At this time,
Instead of returning to the initial state of the program, the control routine is directly entered. Therefore, in the case of an instantaneous power failure within 500 mS, the control process will be performed normally.

With the above configuration, when the zero cross pulse is fixed at Hi or Lo for a certain period of time or longer, the gate trigger of the triac for driving the hot water heater is
No pulse will be output.

EFFECTS OF THE INVENTION As is clear from the above description, the configuration is such that the control circuit unit is initialized when the pulse output from the zero-cross detection circuit of the AC power supply is fixed at Hi or Lo and a certain period of time elapses. Therefore, it is possible to prevent the gate trigger pulse of the heater or the triac as the control element of the motor, which is output in synchronization with the zero cross pulse, from remaining Hi, and the heater triac is It is possible to provide a highly safe sanitary washing device that prevents boiling water from falling into a dangerous state while being turned on.

[Brief description of drawings]

FIG. 1 is a control block diagram of a sanitary washing device according to an embodiment of the present invention, FIG. 2 is the same flowchart, FIG. 3 is a relational diagram of the same zero cross pulse and gate trigger pulse, and FIG. Is a schematic flow chart of a conventional example, FIGS. 5 and 6 are schematic configuration diagrams of a general sanitary washing device, FIG. 7 is a control block diagram of the same, and FIGS. 8 and 9 are zero cross cross sections of a conventional example. It is the figure which showed the relationship between a pulse and a gate trigger pulse. 19 …… pump / motor, 20 …… tank, 21 …… heater,
25 …… Microcomputer, 27,28 …… Triac, 31 …… Zero cross pulse generator, 33 …… System reset section.

Claims (1)

[Claims] 1. A main body having at least a function of washing with hot water, a motor built in the main body and used by applying an AC power source, and a power control means for controlling a load such as a heater and a load such as the heater and the motor. And a zero-cross detection means for detecting the zero-gloss point of the AC power source and outputting a pulse, and a control circuit section for receiving a signal from the zero-cross detection means and outputting an AC synchronization signal to the power control means. A sanitary washing device comprising a system reset unit for initializing the control circuit unit after a fixed period of time when the pulse output of the circuit is fixed to Hi output or Lo output.