JPH0432896B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement of a temperature control device in a hot air drying device.

[Technical background of the invention]

In recent years, private parts washing devices have been installed in toilet bowls, which are equipped with a washing means that sprays washing water at an appropriate temperature and a drying means that uses warm air to dry the private parts that have been washed with the washing water. Toilet bowls with private parts cleaning devices have come into use, which allow for hygienic post-treatment by cleaning and drying private parts without bothering one's hands.

As a cleaning means for this type of device, for example, a solenoid valve is installed between the water supply source and a nozzle for jetting cleansing water placed in the toilet bowl, and a heating device is installed in which a heater and a temperature sensor are housed in the case. The heater is connected to a power source via a switching element, and the washing water flowing into the heating device is instantly heated to a set temperature (approximately 38°C), and Based on the difference between the detection signal of the temperature sensor that detects the temperature of the heated cleaning water and the reference signal of the set temperature, the switching element is energized to keep the temperature of the cleaning water jetted from the nozzle constant. There are instant heating methods.

In addition, as a drying means, a fan connected to an electric motor is installed in a case with an outlet opening that blows warm air toward private parts near the nozzle for jetting cleaning water, and the air blown by the fan is heated. A heater that
A temperature sensor for detecting the temperature of hot air is housed and arranged, an electric motor is connected to a power source, and a heater is connected via a switching element to heat the air blown by the fan and blow out hot air through the outlet. At the same time, the heater is configured to send out hot air by comparing the detection signal of the temperature sensor with a reference signal of a standard temperature (approximately 45 degrees Celsius) to control the energization of the heater.

[Problems with background technology]

However, in the private parts washing device, the temperature of the washing water is controlled to always maintain the set temperature because it cleans sensitive private parts; The hot air used to dry the wet private parts only needs to dry the private parts, so the heater is simply turned on and off when the temperature reaches around the standard target temperature. Therefore, when the hot air drying device is started after washing the private parts, as shown in Fig. 7,
The temperature of the warm air overshoots before it stabilizes at the target temperature, and as a result, immediately after the drying starts, the user feels hot in the vicinity of the private parts, which may cause discomfort to the user. This overshoot of the hot air temperature is about 15° C. higher than the target temperature and takes about 1 to 2 seconds. The causes of this overshoot are that it takes time for the blower motor to rotate at a constant speed after starting up, and that the temperature detection time is delayed due to the thermal response time of the temperature sensor for detecting the temperature of the hot air. It is thought that the temperature rise is due to residual heat from the heater. Therefore, immediately after starting the hot air dryer,
When the heater is fully energized, it rapidly heats the air around it, and the temperature of the heated air is still high before its temperature is detected by a temperature sensor such as a thermistor, whose resistance changes greatly depending on the temperature. Because the fan, which is driven and rotated by the blower electric motor that has not reached stable rotation, blows a breeze near the local area, the hot air dryer will inevitably continue to have warm air at a temperature slightly higher than the target temperature for a while after starting up. will be blown out. For this reason, for example, a system has been developed in which multiple heaters are installed and the energization capacity of the heaters is varied using a changeover switch to warm the air and obtain hot air, but it is not possible to finely adjust the temperature of the hot air. Therefore, it is insufficient to provide the user with the comfortable drying effect of warm air, and there is also the drawback that the user is forced to perform complicated switch operations.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks, and sets the first set temperature of hot air to be lower than a standard temperature suitable for drying (hereinafter referred to as target temperature) when the heater of the hot air drying device starts energizing. When the temperature of the hot air reaches the first set temperature, the heater is turned off once, and when the heater is turned on again, the temperature of the hot air is increased from the first set temperature at the start of energization to the target temperature, and then the temperature is set. By maintaining the temperature, the gap between the detected temperature and the target temperature due to the response delay of the temperature sensor is minimized, and the overshoot of the hot air temperature at the initial stage of energization of the heater caused by the response delay of the temperature sensor is minimized. To provide a temperature control device for a hot air drying device that reliably prevents the above.

[Summary of the invention]

In the present invention, when the heater starts to be energized, and the temperature of the hot air reaches the first set temperature that is slightly lower than the target temperature (in this case, that is, immediately after the heater is energized, the temperature sensor itself is not heated very much, so There is a delay in response, and the temperature actually detected by the temperature sensor is the hot air temperature near the target temperature (approximately 45℃) due to overshoot caused by full energization of the heater. make it stop. (At this time, the first set temperature is set at approximately 37°C. In other words, when determining the first set temperature, the temperature of the hot air may fall below the target temperature due to the overshoot that occurs when the heater starts energizing.) (Set within a range that does not exceed the temperature.) After this, turn on the heater again and raise the temperature of the hot air to the target temperature (at this point, the temperature sensor is heated, so there is almost no response delay, and the temperature increases. The system detects the temperature of the air almost accurately, and also controls the heater's energization to maintain that temperature to maintain an appropriate temperature that does not cause discomfort to the user of the hot air dryer. It is characterized by transmitting a temperature of .

[Embodiments of the invention]

An example in which the present invention is implemented in a hot air drying device attached to a private parts cleaning device will be described below with reference to FIGS. 1 to 6.

In Figures 4 and 5, 1 is a toilet seat attached to the toilet bowl 2, and a horizontally long box 3 is attached to the back of the toilet seat 2.
A water supply pipe 4 connected to a water supply source (not shown) is installed in the box body 3 at a suitable position so as to squirt cleansing water toward private parts via a solenoid valve 5. A nozzle 6 is attached to the tip of the nozzle 6, and a cleaning water heating device 9 containing a hollow ceramic heater 8 housed in a cylindrical case 7 is connected via piping between the nozzle 6 and the solenoid valve 5. The cleaning water flowing through the heating device 9 is instantaneously heated to a set temperature (approximately 38°C) by the heater 8, and this temperature is maintained by a control device (not shown) to maintain the cleaning water at the set temperature. A cleaning device X that blows hot air toward the private parts from a nozzle 6, a blower 11 in which a fan is drivingly connected to a case 10 in which a blower outlet that blows hot air toward the private parts is arranged near the nozzle 6, and this blower 11. A hot air drying device Y that accommodates an air heating heater 12 stretched in front of the air heater 12 and a temperature sensor 13 attached near the air outlet are respectively arranged. In addition, an insulation-coated heater H is provided on the back surface of the toilet seat 1.
A toilet lid 14 that closes the top surface of the toilet seat 1 when the toilet bowl 2 is not in use is pivotally attached to the top surface of the toilet bowl 2 so as to be openable and closable. A control box 3a is formed extending from the box body 3 on the side of the toilet seat 1, and push buttons of push button switches _S1 to _S3 are provided on the top surface of the control box 3a, for example.
"Cleaning", "Drying", and "Toilet Seat" are displayed, and inside the control box 3a, there is a control device for the cleaning device A control device 15 is housed and installed.
The power supply for the solenoid valve 5, heating device 9, hot air drying device Y, and each control device is connected to a connecting terminal (plug) 1 attached to the tip of a cord led out from the box body 3.
Commercial AC power supply (e.g. AC100V) via 6 17
Supplied from.

Next, the control device 15 of the hot air drying device Y will be explained.

18 is a power supply circuit connected to the connection terminal 16;
9 is a resistance-voltage conversion circuit that is connected to the temperature sensor 13 and converts the change in resistance detected by the temperature sensor 13 into a voltage and outputs it; 20 is a standard target temperature for hot air (approximately 45°C); 21 is a comparison circuit incorporating a comparator CP ₁ with an open collector output, and the inverting input terminal of the comparator CP ₁ is connected to a reference value setting circuit that sets the output corresponding to the voltage in the voltage. The output Vt from the reference value setting circuit 20 is input to the non-inverting input terminal, and when these two inputs are compared and Vt≧Vs, the open collector output transistor is turned on and the above-mentioned Current flows inside from the output terminal of comparator CP ₁ , and conversely, when Vt<Vs, the open collector output transistor is turned off and an “H” level signal is output from the output terminal of comparator CP ₁ . . 22 is a flip-flop circuit with a built-in JK flip-flop FF that has clear and preset inputs.
Its input terminal is connected to the output terminal of the comparator circuit 21. Reference numeral 23 denotes a set temperature switching circuit connected between the output terminal of the JK flip-flop FF and the non-inverting input terminal of the comparator _CP1 . The reference value setting circuit 20 is connected to the non-inverting input terminal of _1.
A voltage slightly lower than the voltage corresponding to the target temperature outputted from the controller, that is, a voltage corresponding to the first set temperature (approximately 37° C.) set lower than the target temperature is input. 24 is a zero-cross detection circuit that receives the output of the full-wave rectified waveform from the power supply circuit 18 and sends out a pulse signal at the zero point of the input waveform; 25 is a gate drive connected to each output terminal of the comparator circuit 21 and the zero-cross detection circuit 24; When the push button switch _S2 , which is a drying switch, is turned on in the circuit, the gate drive circuit 25 activates a switching element such as a drying switch using the pulse signal output from the zero-cross detection circuit 24 and the constant voltage power supply _Vcc supplied from the power supply circuit 18. Send a gate signal to Th. 26
is a drying instruction circuit connected to the push button switch _S2 .

Next, the specific circuit configuration of the control device 15 will be explained in more detail with reference to FIG.

The power supply circuit 18 includes a power transformer Tr connected to the connection terminal 16, a diode bridge DB having an AC input terminal connected to the secondary side of this transformer Tr,
Diode D and constant voltage device inserted in series with the DC output terminal of this diode bridge DB
It consists of AVR and a smoothing capacitor c inserted in parallel to the DC output terminal of the diode bridge DB, and supplies a constant voltage power supply Vcc as an operating power source to each of the circuits after lowering the voltage of the commercial power supply and performing full-wave rectification. The resistor-voltage conversion circuit 19 has a resistor R ₁ and a temperature sensor 13 inserted in series between the constant voltage power supply Vcc and the ground, and the connection point between the resistor R ₁ and the temperature sensor 13 is used as an output terminal. Resistance value and resistance according to the temperature of the hot air detected by the temperature sensor 13 from the end
An output Vt divided by R ₁ is sent out. The reference value setting circuit 20 has a resistor R 2 and a variable resistor VR inserted in series between the constant voltage power supply Vcc and the ground, and _{the connection terminal between the resistor R 2 and} the variable resistor VR is used as an output terminal, and from this output terminal is the standard target temperature for warm air (approximately 45
An output Vs is sent out in which the output corresponding to (℃) is set by voltage. The comparator circuit 21 connects the output terminal of the resistor-voltage conversion circuit 19 to the inverting input terminal of the open collector output comparator _CP1 .
The output terminal of the reference value setting circuit 20 is connected to the non-inverting input terminal of CP ₁ , and the output terminal of the comparator CP ₁ is connected to a resistor.
It is connected to the constant voltage power supply Vcc via _R3 and to the cathode of the diode _D1 , and the anode of this diode _D1 is connected to the constant voltage power supply Vcc via the resistor _R4 . When the input of the comparator _CP1 is Vt<Vs, an "H" level signal is output from the output terminal, and when Vt≧Vs, an "L" level signal is output from the output terminal. In the flip-flop circuit 22, the J and K input terminals of the JK flip-flop FF are connected to a constant voltage power supply Vcc, and the CK input terminal is connected to a comparator.
Connected to the output end of CP ₁ , between constant voltage power supply Vcc and ground, normally open contact X ₁ a of relay X ₁ and capacitor C ₁
and resistor R ₅ are inserted in series, and capacitor C ₁
is connected to the CL input terminal of the JK flip-flop FF, and furthermore, the cathode of diode _D2 whose anode is connected to the CL input terminal is connected to the constant voltage power supply _Vcc . The output terminal of the JK flip-flop FF is connected to the input terminal of a set temperature switching circuit 23, which will be described later, and the other output terminal Q is connected to the PR input terminal of the JK flip-flop FF. FF is J, K
If a "H" level signal is always input to the input terminal, the output of the output terminal Q changes to the previous state (for example, from Q to "H" level,
Suppose that an “L” level signal is output from Q) to an inverted state (“L” level from Q,
outputs an “H” level signal).
However, when the input to the PR input terminal is an "H" level signal, the output signal from the output terminal Q does not change even if input is applied to the CK input terminal, and the Q
"H" level signals are output from , and "L" level signals are output from , and even if an input is given to the CK input terminal while an "H" level signal is input to the CL input terminal, the above output The output signal from terminal Q does not change, and a signal of "L" level is output from terminal Q, and a signal of "H" level is output from terminal Q. Furthermore, when both the inputs of the PR input terminal and the CL input terminal are "H" level signals, the CL input terminal takes priority, and the "L" level is output from Q, and the signal is "H" from Q.
Signals of different levels are output. The set temperature switching circuit 23 consists of a transistor Q ₁ whose emitter is grounded, a resistor R ₆ inserted between the collector of this transistor Q ₁ and the non-inverting input terminal of the comparator CP ₁ , and a connection between the base of the transistor Q ₁ and the JK flip-flop FF. A resistor _R7 is inserted between the output terminal of the transistor Q1, and a resistor _R8 is inserted between the base of the transistor _Q1 and ground. And the transistor _Q1 is a JK flip-flop.
It is turned on by the "H" level signal output from the output terminal of the FF, and by turning on this transistor _Q1 , the resistor _R6 is inserted in parallel with the resistor _R2 , and as a result, the reference value is set. circuit 20
The output Vs from is dropped by the insertion of resistor R ₆ in parallel with resistor R ₂ , and this dropped output Vs
is input to the non-inverting input terminal of comparator _CP1 . That is, when the transistor _Q1 is turned on, a voltage corresponding to the first set temperature (approximately 37°C), which is slightly lower than the voltage corresponding to the target temperature, is input to the non-inverting input terminal _of the comparator CP1. Become. The zero cross detection circuit 24 includes a transistor _Q2 whose emitter is grounded,
A diode D 1 whose anode is connected to the collector of this transistor Q ₂ and a cathode connected to the output terminal of the comparator CP ₁ , a diode D _{3 whose} cathode is connected to the base of the transistor Q ₂ , and an anode of this diode D ₃ . and the DC output terminal of the diode bridge DB, and _a resistor _R9 inserted between the base and ground of the transistor _{Q2 .}
With the collector as the output end, a pulse signal synchronized with the zero point of the alternating current is output. Gate drive circuit 2
5 has a built-in photocoupler PC having a pair of light emitting diodes LED ₁ and LED ₂ and light receiving elements PE ₁ and PE ₂ , and its configuration is as _follows :
Connected to the collector of the transistor Q ₂ and the anode of the diode D ₁ of the zero cross detection circuit 24,
Light emitting diodes LED ₁ and LED ₂ of a photocoupler PC are inserted in series between the collector of the transistor Q ₃ and the constant voltage power supply Vcc via a resistor R ₁₁ .
On the other hand, between the gate of the switching element Th and the first anode, there are light receiving elements PE ₁ ,
PE ₂ is inserted in antiparallel via resistor R ₁₂ .
Further, the emitter of the transistor _Q3 is connected to the anode of a diode _D4 whose cathode is connected to the push button switch _S2 . In addition, the Switchig element
The first anode of Th is connected to the connection terminal 16 via the heater 12, and the second anode is directly connected to the connection terminal 16.
The blower 11 is connected to the connecting terminal 16 via the normally open contact X ₂ a of the relay X ₁ in parallel with the switching element Th. The drying instruction circuit 26 includes a relay X ₁ inserted in series between the connection point between the diode D ₄ and the push button switch S ₂ and the constant voltage power supply Vcc, and a diode D ₅ inserted between the terminals of the relay X ₁ . When the push button switch _S2 is turned on, the blower 11 is started, and the heater 12
Start energizing.

The pushbutton switches S ₁ to _{S 3} are configured so that when they are first pressed, they are turned on, and when they are pressed once more, they are turned off.

The following operation will be explained.

After the private part has been cleaned by the private part cleaning device, when the user presses the push button _S2 labeled "Dry" on the top of the control box 3a at time _t1 in Figure 3, the gate drive circuit is activated. 25 transistors
Q ₃ turns on when a “H” level signal is output from the comparator CP ₁ and a pulse signal is sent to the base of the transistor Q ₃ from the zero cross detection circuit 24, and the resistor Q 3 is turned on from the constant voltage power supply Vcc. R ₁₁ →
A current flows between the photocoupler PC → the collector and emitter of the transistor Q ₃ → the diode D ₄ → the push button switch S ₂ → the ground, and the light emitting diodes LED ₁ and LED ₂ of the photocoupler PC emit light. ₁ , Turn on PE ₂ and turn on the switching element.
A gate current flows through the gate of Th, turns on the switching element Th, and starts energizing the heater 12. Relay X ₁ is activated by turning on the push button switch S ₂ .
is also energized, closing its normally open contacts X ₂ a and X ₁ a.

By closing the normally open contact X ₂ a, the blower 11 is also activated and starts blowing air at the same time as the heater 12 is energized. At this time, from the output terminal of comparator CP ₁ of comparison circuit 21,
Immediately after the heater 12 is energized, and there is also a delay in the response of the temperature sensor 13, an "H" level signal is output due to the relationship of Vt<Vs (Fig. 3).
output of CP ₁ ). This comparator _CP1 is an open collector output comparator, and when Vt<Vs,
This is because the open collector output transistor is turned off. Furthermore, the normally closed contact X ₁ a in the flip-flop circuit 22 is also closed by the excitation of the relay X ₁ . By closing the normally open contact X ₁ a, the capacitor C ₁ is charged by the constant voltage power supply Vcc via the resistor R ₅ . At this time, the moment the normally open contact X ₁ a closes, the capacitor C ₁
is not charged, so the JK flip-flop
A constant voltage power supply Vcc (“H” level signal) is input to the CL input terminal of the FF. Further, as the capacitor _C1 is charged by the constant voltage power supply Vcc, the potential between the connection point between the capacitor _C1 and the diode _D2 and the ground gradually drops to zero volts. Said JK
The moment an "H" level signal is input to the CL input terminal of the flip-flop FF, an "H" level signal is output from its output terminal (output shown in FIG. 3). Then, the "H" level signal outputted from the output terminal of the JK flip-flop FF turns on the transistor _Q1 of the set temperature switching circuit 23, so that the potential input to the non-inverting input terminal of the comparator _CP1 is turned on. is reduced by inserting resistor R ₆ in parallel with resistor R ₂ . In other words, the potential of the first set temperature, which is slightly lower than the potential of the target temperature, is the potential of the comparator.
Input to the non-inverting input terminal of CP ₁ . In this way, when the push button switch _S2 is turned on, the output Vs from the reference value setting circuit 20 is temporarily lowered from the target temperature level to the first set temperature level (input CP1 in Figure ₃ ). .

In this way, at the initial stage of energizing the heater 12, the temperature of the hot air is controlled at the first set temperature. When the temperature of the hot air is detected by the temperature sensor 13 at the set temperature (approximately 37°C) (at this point, due to the delayed response of the temperature sensor 13,
The overshoot phenomenon has already occurred and the temperature of the hot air has reached around the target temperature (approximately 45°C) as shown in Figure 6), and the input to comparator CP ₁ of comparator circuit 21 is Vt.
Since the relationship is ≧Vs, “L” is output from the output terminal.
A level signal is output. For this reason, the comparator
CP ₁ is an open collector output transistor that turns on and connects resistor R ₃ and resistor from constant voltage power supply Vcc.
Since the current flowing through R ₄ flows into the comparator CP ₁ and no base current flows into the transistor Q ₃ of the gate drive circuit 25, the transistor Q ₃ is turned off. When the transistor _Q3 is turned off, the switching element Th is also turned off, and the current supply to the heater 12 is temporarily stopped. By stopping the energization of the heater 12, the temperature of the hot air drops by one level, and the input to the comparator _CP1 becomes Vt<
When the relationship returns to Vs, an "H" level signal is output from the output terminal again. (Output of CP ₁ at time t ₂ in Figure 3) Therefore, transistor Q ₃ of the gate drive circuit 25 is turned on by the current synchronized with the zero cross supplied again (at time t ₂ in Figure 3). 25 output), a gate signal flows to the gate of the switching element Th, turns on the switching element Th, and energizes the heater 12 again. In addition, when the JK flip-flop FF inputs a "H" level signal again after the "L" level signal is output from the output terminal of the comparator _CP1 to the CK input terminal, the output terminal of the JK flip-flop FF , Q are inverted, and the output end outputs an "L" level signal, and the output end Q outputs an "H" level signal. Then, the transistor _Q1 of the set temperature switching circuit 23 is turned off by the "L" level signal output from the output terminal of the JK flip-flop FF. Therefore, the resistor _R6 is no longer inserted in parallel with the resistor _R2 , so the potential at the output terminal of the reference value setting circuit 20 rises from the potential of the first set temperature to the potential of the target temperature (the third When the potential input to CP ₁ at time t ₂ in the figure has a relationship of Vt<Vs, the "H" level signal continues to be output from its output terminal,
At this time, the gate drive circuit 25 operates to energize the heater 12, and when the temperature of the hot air reaches the target temperature, the input from the output terminal of the comparator _CP1 is Vt≧
Since the relationship is Vs, an "L" level signal is output, and no current flows through the gate drive circuit 25, so that the heater 12 is de-energized.
By repeating such a state, the temperature of the hot air is maintained at the target temperature and is sent out. Furthermore, at this point, the temperature sensor 13 itself is heated by the hot air and there is no response delay, so no overshoot phenomenon occurs and the temperature of the hot air is maintained at the target temperature as shown in FIG. At this time, since the output terminal Q of the JK flip-flop FF is connected to the PR input terminal, an "H" level signal is output from the output terminal Q, so that the signal from the comparator CP ₁ is connected to the CK input terminal. Even if an output "H" level or "L" level signal is input, the outputs of output terminals Q and Q will not change. Therefore, the set value of the hot air temperature is the first value when the heater 12 starts to be energized.
Once the set temperature is switched to the target temperature, the temperature will not be switched back to the first set temperature. That is, in order to change the output of the JK flip-flop FF and Q, an input signal must be applied to the CL input. This means that when push button switch _S2 is turned off to stop hot air delivery, and then when hot air delivery is started again, the above-mentioned
By inputting an "H" level signal to the CL input terminal of the JK flip-flop FF, the set value of the hot air temperature can be switched from the target temperature to the first set temperature.

〔Effect of the invention〕

As explained above, in the present invention, when the heater starts being energized, the output from the set temperature switching circuit is input to the comparator circuit, thereby changing the input from the reference value setting circuit to the comparator circuit from the level of the target temperature. , the energization of the heater is controlled by temporarily lowering the temperature to the level of the first set temperature set by the set temperature switching circuit, and when the hot air temperature reaches the first set temperature, the heater is energized once. After that, the heater is energized again, and its energization control is turned on and off normally.
Since the configuration is configured so that the temperature of the hot air is raised to the target temperature by switching to off control and maintained at that temperature, the temperature detected by the temperature sensor is Although the wind temperature is at the level of the first set temperature, it actually reaches near the target temperature, so the present invention provides that when the temperature sensor detects the hot air temperature at the level of the first set temperature, By adopting a structure that temporarily stops the power supply to the heater, hot air with a temperature higher than the target temperature will not be blown out, which will prevent problems caused by overshot hot air being blown out when drying local areas. You can definitely eliminate the pleasure.

Further, as described above, in the initial stage of energization of the heater, the energization of the heater is controlled so that the first set temperature is obtained, which is slightly lower than the target temperature set in advance by the set temperature switching circuit. 1st
When the temperature of the hot air at the set temperature is detected by the temperature sensor, the system is configured to switch to normal on/off control and control the heater's energization.
In advance, in anticipation of the overshoot phenomenon of the hot air temperature caused by a delay in the response of the temperature sensor, the power supply is temporarily stopped and the power is turned on to the heater again before the hot air temperature reaches the target temperature. The two-step energization control system is used to control the energization of the heater, so hot air at the target temperature can be obtained quickly and easily without waste, and it also eliminates problems caused by delayed response of the temperature sensor. The temperature of hot air can be accurately detected using a temperature sensor.

Furthermore, when the heater is initially energized, the present invention temporarily stops the energization to the heater when the temperature of the hot air reaches the first set temperature level, but it takes almost no time to re-energize the heater. Even when the power supply is stopped, the residual heat of the heater can be effectively used to dry the local area, and the user can be comfortably dried without any discomfort caused by the blowing of cold air.

Moreover, the temperature control device has a simple circuit configuration, since it is only necessary to provide a normal control circuit with a set temperature switching circuit for switching the hot air temperature from the target temperature to the first set temperature, which is slightly lower than the target temperature. Another advantage is that the temperature of the hot air can be controlled smoothly and well.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a control device showing an embodiment of the invention, FIG. 2 is a circuit diagram embodying the control device of the invention, and FIG. 3 is a time chart for explaining the operation of the invention. , FIG. 4 and FIG. 5 are a partially cutaway plan view and side view of a toilet bowl with a private parts cleaning device according to the present invention, FIG. 6 is a temperature characteristic diagram of warm air produced by this device, and FIG. It is a temperature characteristic diagram of hot air in a conventional device. 12... Heater, 13... Temperature sensor, 19...
...Resistance-voltage conversion circuit, 20... Reference value setting circuit, 21... Comparison circuit, 22... Flip-flop circuit, 23... Temperature setting switching circuit, 25... Gate drive circuit, Y... Warm air drying device.

Claims (1)

[Claims] 1. A comparison circuit that compares the signal from the temperature sensor that detects the temperature of the hot air with the signal from the reference value setting circuit that sets the target temperature of the hot air, and energization of the heater based on the output signal from the comparison circuit. In the temperature control device for a hot air drying device, the temperature control device includes a gate drive circuit for controlling the temperature of the hot air dryer, in which the temperature is set at a temperature slightly lower than the target temperature output from the reference value setting circuit in the initial stage of starting energization of the heater. The temperature control device is equipped with a set temperature switching circuit that outputs a signal corresponding to the set temperature to the comparison circuit, and when the heater starts energizing, the temperature of the hot air is controlled using the output from the set temperature switching circuit. When the hot air temperature reaches the first set temperature, a signal corresponding to the target temperature output from the reference value setting circuit is input to the comparison circuit, and the temperature is controlled at a first set temperature that is slightly lower than the temperature. A temperature control device for a hot air drying device, characterized in that air temperature control is switched from the first set temperature to a normal target temperature.