JPH11117369A - Sanitary washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a high density mounting by distinguishing a current detection to two heaters by detecting separate phase timing and inputting two detected signals as a single detected signal. SOLUTION: A sanitary washing device equipped with a heater 6 and a heater 7 used by a commercial AC power source 9 and controlled independently, photo couplers 17, 22 to the heaters 6, 7, a pump motor and a controller. And detected signals by photo couplers 17, 22 in separate phases respectively of the commercial AC power source 9 are input as a single signal to a microcomputer 11, and the microcomputer 11 stops the pump motor 8 in configuration when the relation between the input value and the phase of commercial AC power source 9 fulfill the predetermined relation. According to this, presence or absence of electric current of two heaters can be detected only by the input to one signal line. Thus, the input required for detecting a current to the heater can be made available through one single line only, by which the controller can be simplified and cost can be reduced and mounting density can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary washing device, and more particularly to a safety device in the event of a failure in a heater control device.

[0002]

2. Description of the Related Art A conventional sanitary washing apparatus will be described with reference to FIGS.

FIG. 3 is an external view of a sanitary washing device, 1 is a sanitary washing device main body, 2 is a toilet bowl, 3 is a toilet seat installed on the toilet bowl 2, and 4 is a low tank.

FIG. 4 is a block diagram of a channel of a sanitary washing device.
In a tank 5 built in the main body 1, a heater 6 as a first heater and a heater 7 as a second heater are incorporated. Reference numeral 8 denotes a pump motor. When the pump motor is operated to inject water from the low tank 4 into the tank 5, the water warmed by the heaters 6 and 7 becomes hot water and is discharged from the tank 5 to become washing water. .

FIG. 5 is a main part circuit diagram of a control device of a conventional sanitary washing device. 9 is a commercial AC power supply, and 10 is a power supply device for stepping down and stabilizing the commercial AC power supply. 11
Is a microcomputer, which operates when power is supplied from the power supply device 10.

Reference numerals 12 and 13 denote triacs for controlling ON / OFF of the heaters 6 and 7, respectively. When the output 11c of the microcomputer 11 is Lo, the transistor 14
FF is performed, and no current flows through the gate 12g of the triac 12, so that the triac 12 is turned off and the heater 6 is not energized. The output 11c of the microcomputer 11 is Hi
, The transistor 14 turns on and the triac 12
Current flows through the gate 12g of the
N, and the heater 6 is energized. Similarly, microcomputer 1
1 is low, the transistor 15 is turned off.
F, and no current flows through the gate 13g of the triac 13, so that the triac 13 is turned off and the heater 7
Is not energized. When the output 11d of the microcomputer 11 becomes Hi, the transistor 15 is turned on, a current flows through the gate 13g of the triac 13, and the triac 13 is turned on.
And the heater 7 is energized. The two heaters 6 and 7 are independently controlled so that the water can be heated with the optimal heat quantity according to the situation.

The pump motor 8 outputs the output 11 of the microcomputer 11.
e controlled by a transistor 16 connected to
When e outputs Hi, the transistor 16 is turned on, and the pump motor 8 rotates. When the output 11e outputs Lo, the transistor 16 is turned off and the pump motor 8 stops.

Reference numeral 17 denotes a photocoupler. When the heater 6 is energized, a resistor 1 is connected to an input LED 18 of the photocoupler 17.
9, a current flows through the output transistor 20.
Turns ON. When the transistor 20 is turned on, the input 11a of the microcomputer 11 becomes Lo. When the heater 6 is not energized, no current flows through the input-side LED 18 of the photocoupler 17, so that the output-side transistor 20 is turned off.
F. If the transistor 20 is turned off, the microcomputer 1
Since the input 11a of 1 is pulled up by the resistor 21, it becomes Hi. Similarly, reference numeral 22 denotes a photocoupler, and when the heater 7 is energized, an input LED 23 of the photocoupler 22
, A current flows through the resistor 24, so that the output transistor 25 is turned on. When the transistor 25 is turned on, the input 11b of the microcomputer 11 becomes Lo. Heater 7
Is not energized, no current flows through the input LED 23 of the photocoupler 22, and the output transistor 25 is turned off. When the transistor 25 is turned off, the input 11b of the microcomputer 11 becomes Hi because it is pulled up by the resistor 26.

If the triac 12 or the triac 13 breaks down and the heater 6 or the heater 7 is continuously turned on, the temperature control becomes impossible, so that the temperature of the water in the tank 5 rises abnormally, and Dangerous to be released. To prevent this, the microcomputer 11 controls the inputs 11a and 11
b is constantly monitored, and if the input 11a is Lo when the heater 6 is turned off, it is determined that the triac 12 is abnormal, and the input 11b is low when the heater 7 is turned off.
If it is o, it is determined that the triac 13 is abnormal. When it is determined that the triac 12 or the triac 13 is abnormal, the microcomputer 11 sets the output 11e to Lo, turns off the transistor 16, stops the pump motor 8, and
Prevent hot water from being released.

[0010]

However, in the conventional configuration as described above, the signals for detecting the abnormality of the two heaters are independent and are connected to the inputs of the microcomputer, respectively. And two signal lines are also required. The number of I / O ports will be reduced if a microcontroller with a little cost is adopted, and the number of I / O ports will be inadequate if two input ports are occupied from the present condition that is almost full of the functions required for controlling the sanitary washing toilet seat Therefore, there is a problem that the cost is increased by using a microcomputer one rank higher to increase the number. In addition, since two signal lines are required, the area required for the wiring is also increased, and the sanitary washing toilet seat is originally mounted at a high density in a limited narrow space, which is disadvantageous from the viewpoint of the mounting area. .

The present invention solves the above-mentioned conventional problems. By combining the two heater energization detection signals into one and inputting them to one input port of the microcomputer, the cost of the microcomputer is reduced and the wiring is reduced. An object is to perform high-density mounting by simplifying a turn.

[0012]

In order to solve the above-mentioned conventional problems, the sanitary washing device of the present invention makes it possible to distinguish the energization detection of two heaters by detecting them in different phases of a power supply, thereby making it possible to distinguish between two heaters. The energization detection signals into a single
It is configured to input to one input port.

As a result, a high-density design can be performed by reducing the cost of the microcomputer and simplifying the wiring layout.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention comprises a first heater and a second heater which are used by a commercial AC power supply and are independently controlled, and means for detecting energization of each of the heaters. A first and a second energization detecting means, a pump motor, and a control device, wherein the detection signals of the first and the second energization detecting means for detecting at different phases of the commercial AC power supply are respectively 1 The control device is configured to stop the pump motor when the relationship between the input value and the phase of the commercial AC power supply is under a predetermined condition. Since the presence or absence of energization of two heaters can be detected only by inputting one signal line, the control device can be simplified, and cost reduction and high-density mounting can be realized.

[0015]

1 to 4 show an embodiment of the present invention.
It will be described based on.

FIG. 3 is an external view of a sanitary washing device, 1 is a sanitary washing device main body, 2 is a toilet bowl, 3 is a toilet seat installed on the toilet bowl 2, and 4 is a low tank.

FIG. 4 is a block diagram of a channel of the sanitary washing device.
The tank 5 built in the sanitary washing device main body 1 has a heater 6 as a first heater and a heater 7 as a second heater.
Is incorporated. Reference numeral 8 denotes a pump motor. When the pump motor is operated to inject water from the low tank 4 into the tank 5, the water warmed by the heaters 6 and 7 becomes hot water and is discharged from the tank 5 to become washing water. .

FIG. 1 is a circuit diagram of a main part of a control device of a sanitary washing device according to an embodiment of the present invention. 9 is a commercial AC power supply, and 10 is a power supply device for stepping down and stabilizing the commercial AC power supply. Reference numeral 11 denotes a microcomputer, which operates when power is supplied from the power supply device 10.

Reference numerals 12 and 13 denote triacs for controlling ON / OFF of the heaters 6 and 7, respectively. When the output 11c of the microcomputer 11 is Lo, the transistor 14
FF is performed, and no current flows through the gate 12g of the triac 12, so that the triac 12 is turned off and the heater 6 is not energized. The output 11c of the microcomputer 11 is Hi
, The transistor 14 turns on and the triac 12
Current flows through the gate 12g of the
N, and the heater 6 is energized. Similarly, microcomputer 1
1 is low, the transistor 15 is turned off.
F, and no current flows through the gate 13g of the triac 13, so that the triac 13 is turned off and the heater 7
Is not energized. When the output 11d of the microcomputer 11 becomes Hi, the transistor 15 is turned on, a current flows through the gate 13g of the triac 13, and the triac 13 is turned on.
And the heater 7 is energized. The two heaters 6 and 7 are independently controlled so that the water can be heated with the optimal heat quantity according to the situation.

The pump motor 8 has an output 11 from the microcomputer 11.
e controlled by a transistor 16 connected to
When e outputs Hi, the transistor 16 is turned on, and the pump motor 8 rotates. When the output 11e outputs Lo, the transistor 16 is turned off and the pump motor 8 stops.

Reference numeral 17 denotes a photocoupler, which is first energization detecting means. When a current is supplied to the heater 6, only the half cycle phase of the commercial AC power supply 9 in which the voltage on the a side is higher than that on the b side of the heater 6 Since the current flows through the input LED 18 of the photocoupler 17 through the resistor 19, the output transistor 20 is turned on. When the transistor 20 is turned on, the input 11a of the microcomputer 11 becomes Lo. When the heater 6 is not energized, the input side LED of the photocoupler 17
18 does not flow, the output side transistor 20
Turns off.

Reference numeral 22 denotes a photocoupler, which is a second energization detecting means. When a current is applied to the heater 7, only the half cycle phase of the commercial AC power supply 9 in which the voltage is higher on the b side than on the a side of the heater 7 Since a current flows through the input LED 23 of the photocoupler 22 through the resistor 24, the output transistor 25 is turned ON. When the transistor 25 is turned on, the input 11a of the microcomputer 11 becomes Lo. When the heater 7 is not energized, the input side LED of the photocoupler 22
23, no current flows through the output transistor 25.
Turns off.

When both the transistor 20 and the transistor 25 are turned off, the input 11a of the microcomputer 11 becomes Hi because the input 11a is pulled up by the resistor 21. As described above, the input 11a of the microcomputer 11 is an AND of the transistor 20 and the transistor 25, and these transistors 20 and 25 are connected in reverse directions of the LEDs 18 and 23 so as to operate in different phases. So that they are not turned on at the same time. When either transistor becomes Lo, the input 11a becomes Lo, but when both the transistors 20 and 25 are turned on, the input 11a becomes Lo for one cycle of the commercial AC power supply 9 and when only one transistor is turned on. Is that the input 11a becomes Lo for a half cycle. Therefore, L to input 11a
If the input o is only a half cycle of the commercial AC power supply 9, it is detected that either the heater 6 or the heater 7 is energized, and if the Lo input to the input 11a is one cycle, the heater 6 and the heater 7 is detected to be energized.

Reference numeral 27 denotes a zero-cross pulse circuit which outputs a signal at a timing of 0 degree and 180 degrees of the phase of the commercial AC power supply 9 and inputs the signal to the input 11f of the microcomputer 11.

If the triac 12 or the triac 13 breaks down and the heater 6 or the heater 7 is continuously turned on, the temperature control becomes impossible, so that the water temperature in the tank 5 rises abnormally, and Dangerous to be released. In order to prevent this, the microcomputer 11 constantly monitors the input 11a and detects an abnormality of the triac 12 or 13. A sequence for detecting an abnormal operation of the heater 6 and the heater 7 by the microcomputer 11 will be described with reference to a flowchart shown in FIG. First, when the power is turned on in the flow 28, the flow proceeds to the flow 29. If it is detected in the flow 29 that both the heater 6 and the heater 7 are not energized, the temperature of the cleaning water does not rise abnormally, so the loop returning to the flow 29 is repeated. If it is detected in the flow 29 that at least one of the heater 6 and the heater 7 is energized, the process proceeds to a flow 30. Flow 30
In the case where Hi is output to both the output 11c and the output 11d and both the heater 6 and the heater 7 are ON, since the operation is a normal operation, even if the triac 12 or 13 is out of order, the hot water temperature is reduced. Since it does not become abnormally high, the failure determination is not performed and the loop returning to the flow 29 is repeated. If at least one of the heater 6 and the heater 7 is OFF in the flow 30, the process proceeds to the flow 31. Flow 3
If Lo is output to the outputs 11c and 11d so that both the heater 6 and the heater 7 are turned off in step 1, the heater energization should not be detected normally, but the flow to the heater is detected in flow 29. Therefore, the heater which is not originally intended to be energized is energized, and it is considered that the triac 12 or the triac 13 is short-circuited. Stop and prevent hot wash water from being released. If only one of the output 11c or the output 11d outputs Hi so that either the heater 6 or the heater 7 is turned on in the flow 31, the process proceeds to the flow 33, and the power supply to the heater 6 or the heater 7 is performed. Whether the detection is only a half cycle or one cycle is input 11f.
Is determined based on the correlation with the timing of the zero-cross pulse. From the time when the first zero-cross pulse is detected to the time when the next zero-cross pulse is detected, the input 11a
If Lo is Lo, the detection of energization to the heater is one cycle, otherwise half a cycle. If the energization of the heater 6 or the heater 7 is not detected in one cycle, the operation returns to the flow 29 because the operation is normal. If the detection of energization of the heater 6 or the heater 7 is one cycle, the triac 12 or 13 has a short-circuit failure, so the flow goes to the flow 32 to stop the pump motor 8 so that the high-temperature washing water is not discharged. I do.

[0026]

As described above, the sanitary washing device of the present invention distinguishes the detection of the current supply to the two heaters by detecting them at different phase timings and combines the two detection signals into one. Input can be combined into a single input necessary for heater energization detection, the control device can be simplified, and cost reduction and improvement in mounting density can be realized.

[Brief description of the drawings]

FIG. 1 is a main part circuit diagram of a control device of a sanitary washing device in one embodiment of the present invention.

FIG. 2 is a flowchart of a sequence for detecting an abnormal operation of a heater of the control device of the sanitary washing device according to one embodiment of the present invention.

FIG. 3 is an external view of a sanitary washing device according to a related art and an embodiment of the present invention.

FIG. 4 is a block diagram of a waterway of a sanitary washing device according to the related art and an embodiment of the present invention.

FIG. 5 is a circuit diagram of a main part of a control device of a conventional sanitary washing device.

[Explanation of symbols]

 Reference Signs List 6 first heater 7 second heater 8 pump motor 9 commercial AC power supply 11 microcomputer 17 first energization detecting means 22 second energization detecting means

Claims (1)

[Claims] A first heater and a second heater which are powered by a commercial AC power supply; first and second power supply detecting means for detecting power supply to each of the heaters; And a control device, and one detection signal of the first conduction detection means and one detection signal of the second conduction detection means for detecting conduction of each heater at different phases of the commercial AC power supply. A sanitary washing device configured to stop the pump motor when the relationship between the input value and the phase of the commercial AC power supply is a predetermined condition.