JPH0380944B2 - - 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.

The cleaning means of the private parts cleaning device includes, for example, a solenoid valve installed between a water supply source and a nozzle for jetting cleansing water disposed in the toilet bowl, and a heater and a temperature sensor housed in a case. The heater is connected to a power source via a switching element, and the cleaning water flowing into the heating device is instantly heated to a set temperature (approx.
℃), 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 and the cleaning water is spouted from the nozzle. There is an instant heating method that controls the temperature to remain constant.

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 warm 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 set temperature. Therefore, when the hot air drying device is started after washing the private parts, as shown in Fig. 7,
The temperature of the hot air overshoots before it stabilizes at the set temperature, and as a result, immediately after the drying starts, the user feels hot in the vicinity of their private parts, causing discomfort to the user. This overshoot of the hot air temperature is about 15° C. higher than the set 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. This may be due to temperature rise due to residual heat from the heater. Therefore, immediately after starting the hot air drying device, the heater is fully energized and rapidly heats the air around it, and this heated air is heated before its temperature is detected by the temperature sensor. Because the fan is driven and rotated by the blower electric motor that has not reached stable rotation, a slight breeze is blown around the local area, so immediately after the hot air dryer is started, the warm air is slightly higher than the set temperature for a while. It 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 when the heater starts to be energized, the energization is controlled to increase the amount of energization to the heater in stages, that is, by soft-starting the energization to the heater, the heater is This prevents overshoot of the hot air temperature caused by full energization immediately after the start of energization, and when the hot air temperature reaches the set temperature, the heater energization control changes from a soft start to normal on/off control. An object of the present invention is to provide a temperature control device for a hot air drying device, which maintains the hot air temperature at a set temperature by switching to the temperature of the hot air dryer.

[Summary of the invention]

The present invention provides a soft start circuit that suppresses and controls the amount of current supplied to the heater at the initial stage of energization, in order to prevent overshoot caused by full energization of the heater at the start of startup of a hot air drying device; A judgment circuit for judging whether the temperature of the air has reached the set temperature or not, and a control circuit that controls the heater's energization from a soft start based on a command from the judgment circuit after the temperature of the hot air reaches the set temperature. Equipped with a switching circuit for switching to normal on/off control, when the hot air dryer is started, the heater is soft-started to suppress overshoot and the hot air temperature reaches the set temperature. The other feature is that the soft start is canceled and the energization of the heater is switched to normal on/off control to send out warm air at an appropriate temperature that does not cause discomfort to the user.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 6, in which the present invention is applied to a private parts cleaning device.

In FIGS. 3 and 4, reference numeral 1 denotes a toilet seat mounted on a toilet bowl 2. A horizontally long box 3 is attached to the back of the toilet seat 2, and a water supply pipe 4 connected to a water supply source (not shown) is mounted on the box 3. is piped to a position suitable for squirting cleaning water toward private parts via a solenoid valve 5, a nozzle 6 is attached to the tip of the water supply pipe 4, and this nozzle 6
A cleaning water heating device 9 containing a hollow ceramic heater 8 housed in a cylindrical case 7 is connected between the solenoid valve 5 and the solenoid valve 5, and the cleaning water flowing through the heating device 9 is heated as described above. A cleaning device that instantaneously heats up to a set temperature (approximately 38°C) by a heater 8, maintains this temperature by a control device (not shown), and jets cleaning water at the set temperature from a nozzle 6 toward private parts. A case 10 in which a blower outlet for blowing hot air toward a local area is arranged near the nozzle 6.
, a blower 11 connected to a fan, and a heater 12 for heating the air stretched in front of the blower 11.
and a hot air drying device Y that accommodates a temperature sensor 13 attached near the outlet. In addition, an insulated heater H is provided on the surface of the toilet seat 1, and a toilet lid 14 is provided on the back surface of the toilet seat 1 to close off the top surface of the toilet seat 1 when the toilet bowl 2 is not in use. It is pivoted so that it can be opened and closed. 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 connected to the temperature sensor 13 and converts the change in resistance value detected by the temperature sensor 13 into a voltage and outputs the voltage; 20 is input with the output vt of the resistance-voltage conversion circuit 19; In the comparison circuit,
The output Vs of the reference value setting circuit 21 is input to the other input terminal, and the output Vs of the reference value setting circuit 21 is set as a voltage to the output corresponding to the standard set temperature (approximately 45 degrees Celsius) of warm air. “H” when Vt<Vs
When Vt≧Vs, an “L” level output signal is output. 22 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; 23 is a relay on the output side of the comparison circuit 20;
A gate drive circuit connected via the normally open contact X _{2 a} of
Send a gate signal to Th. Note that one output end of the zero cross detection circuit 22 is connected to the input end of the gate drive circuit 23, and the other output end is connected to the input end of the soft start circuit 24. The output end of this soft start circuit 24 is connected to the input end of the gate drive circuit 23 via the normally closed contact X ₂ b of the relay X ₂ . 25 is a drying start instruction circuit, one of its output terminals is the input terminal of the soft start circuit 24, and the other is the input terminal of the switching circuit 26 for switching the energization control of the heater 12 from soft start to normal on/off control. It is connected to the. 27 is a judgment circuit for judging whether or not to switch the energization control of the heater 12 from soft start to normal on/off control; its input terminal is connected to the input terminal of the comparison circuit 20; The output ends are respectively connected to the input ends of the switching circuit 26.

The specific circuit configuration of the control device 15 is described in a second embodiment.
This will be explained in more detail with reference to figures.

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,
A diode D, a voltage regulator AVR, and a voltage regulator AVR are connected in series to the DC output terminal of this diode bridge DB.
It consists of a smoothing capacitor C connected in parallel to the DC output terminal of the diode bridge DB, and supplies a constant voltage power supply Vcc, which is obtained by lowering the commercial power supply, full-wave rectification, and then making it constant voltage, as an operating power source for each of the circuits. . The resistance-voltage conversion circuit 19 is formed by inserting a resistor R ₁ and a temperature sensor ₁₃ in series between the constant voltage power supply Vcc and the ground.
With the connection point with 3 as the output end, from this output end,
An output Vt divided by a resistance value corresponding to the temperature of the hot air detected by the temperature sensor 13 and a resistor _R1 is sent out. The reference value setting circuit 21 is formed by inserting a resistor R ₂ and a variable resistor VR in series between the constant voltage power supply Vcc and the ground, and uses the connection point between the resistor R ₂ and the variable resistor VR as an output terminal, and outputs this output. From the end, an output Vs is sent out which is set by voltage to correspond to the standard set temperature of hot air (approximately 45 degrees Celsius). Comparison circuit 20 is a first comparator with open collector output.
The inverting input terminal of _A1 is connected to the output terminal of the resistance-voltage conversion circuit 19, and the non-inverting input terminal of the first comparator _A1 is connected to the output terminal of the reference value setting circuit 21. The device _A1 compares the input from the resistance-voltage conversion circuit 19 and the input from the reference value setting circuit 21, and outputs an “H” level signal when both inputs are Vt<Vs, and outputs an “H” level signal when Vt≧Vs. outputs "L" level signals, respectively. The zero cross detection circuit 22 consists of transistors Q ₁ and Q ₂ whose emits are grounded.
The collector of the transistor Q ₁ is connected to the constant voltage power supply _Vcc through the resistor R ₃ and the collector of the transistor Q ₂ is connected to the constant voltage power supply Vcc through the resistor R ₄ .
Diode D ₁ with cathode connected to the base of Q ₂
The anode of is connected to the DC output terminal of the diode bridge DB via a resistor _R5 , and a resistor _R6 is connected between the base and emitter of the transistors _Q1 and _Q2 .
are inserted, and the collectors of these transistors Q ₁ and Q ₂ are used as output terminals, and the transistors Q ₁ and Q ₂ turn off at the zero point of the full-wave rectified voltage, and a pulse signal is output from the output terminal (collector). The gate drive circuit 23 includes a pair of light emitting diodes LED ₁ ,
Photocoupler having LED ₂ and light receiving elements PE ₁ and PE ₂
It has a built-in PC, and its configuration is the first comparator A ₁
The base of the emitter-grounded transistor Q ₃ is connected to the output terminal of the relay X ₂ via the normally open contact X ₂ a, and the connection point between the base of the transistor Q ₃ and the normally open contact X ₂ a is , the collector of the transistor _Q1 of the zero cross detection circuit ₂₂ is connected to the ground by connecting the resistor R7, and the collector of the transistor _Q3 and the constant voltage power supply Vcc are connected in series through the resistor _R8 . A light emitting part of a photocoupler PC consisting of light emitting diodes LED ₁ and LED ₂ is inserted, and a photothyristor or the like connected in antiparallel through a resistor R ₉ is inserted between the gate of the switching element Th and the first anode. Insert the light receiving part of the photocoupler PC consisting of a pair of light receiving elements PE ₁ and PE ₂ , and connect the comparator circuit 2.
When "H" level signals are outputted from the first comparator _A1 of zero and the second comparator _A2 of the soft start circuit 24, which will be described later, a base current flows through the base of the transistor _Q3. By turning on transistor _Q3 , the photocoupler PC
is driven to turn on the switching element Th, and conversely, when an "L" level signal is output,
Since the transistor _Q3 is turned off and the photocoupler PC is not driven, the switching element Th is turned off. The first anode of the switching element Th is connected to the heater 12, and the second anode is connected to the normally open contact _X1a of the relay _X1 . Further, the blower 11 is connected to the connecting terminal 1 along with the switching element Th.
6 are connected in parallel. Soft start circuit 2
4 consists of a binary down counter DC (hereinafter referred to as a counter), not circuits N ₁ to N ₃ , a transistor Q ₄ , and a second comparator A ₂ with an open collector output.
The input terminal CK of the DC is connected to the collector of the transistor Q ₂ of the zero cross detection circuit 22, and between the output terminal and the input terminal LD, there are connected circuits N ₁ , N ₂ , resistors R ₉ ',
A knot circuit _N3 is inserted in series, and a capacitor _C1 is inserted between the connection point between the knot circuit _N3 and the resistor _R9 ' and the ground. Next, the base of a transistor _Q4 whose emitter is common is connected between the output terminal of the knot circuit _N1 and the input terminal of the knot circuit _N2 via a resistor _R11 , and the collector of this transistor _Q4 is It is connected to a connection point _V1 between a resistor _R12 and a resistor _R13 , which are inserted in series between the constant voltage power supply Vcc and the ground, and a capacitor _C2 is inserted between the resistor _R13 and the ground, and a transistor A resistor _R10 is inserted between the base and emitter of _Q4 . And now,
When the signal input to the input terminal LD of the counter DC is set to "H" level, the inputs of AIN to DIN are preset to the counter DC. Therefore, the pulse signal output from the collector of the transistor _Q2 of the zero cross detection circuit 22 is connected to the input terminal of the counter DC.
When the pulse signal is input to CK, the counter DC counts down this pulse signal, and when the count value reaches zero, an "L" level signal is output from the output terminal of the counter DC. This "L" level signal is inverted by the NOT circuit _N1 and output as an "H" level signal from the output terminal of the NOT circuit _N1 , and is connected to the base of the transistor _Q4 via the resistor _R11. The base current flows and turns on transistor _Q4 . When an "L" level signal is not output from the output terminal of the counter DC, no base current flows to the base of the transistor _Q4 , so the transistor _Q4 is turned off. This transistor Q ₄
is off, capacitor _C2 is a constant voltage power supply
It is also charged from Vcc through resistors R ₁₂ and R ₁₃ , and when transistor Q ₄ is turned on, capacitor C ₂ is charged through resistors R 12 and R 13.
Discharged through _R13 . For this reason, the resistance R ₁₂ and
At the connection point _V1 with _R13 , a sawtooth wave Va is outputted in synchronization with the zero cross of the alternating current, with one cycle being four cycles of the alternating current power supply. Note that the output Va from the connection point _V1 is input to the inverting input terminal of the second comparator _A2 . The drying start instruction circuit 25 includes a relay between the constant voltage power supply Vcc and the a contact side of the interlocking push button switch S ₂ (starting switch of the hot air drying device Y).
X ₁ is inserted in series, a diode D ₂ is inserted in antiparallel between the terminals of relay X ₁ , and the connection point between this relay X ₁ and the a contact of push button switch S ₂ is
A capacitor _C3 is inserted between the resistor _R14 and a resistor _R15 between the Vcc and the above resistor.
A diode _D3 is inserted in antiparallel between the terminals of _R14 . The connection point V ₂ between the capacitor C ₃ and the resistor R ₁₄ is connected to the non-inverting input terminal of the second comparator A ₂ of the soft start circuit 24. Therefore, when push button switch S ₂ is turned on, the capacitor
Charging of C ₃ is started through R ₁₄ , and the potential at the connection point V ₂ gradually increases from zero volts to the constant voltage power supply Vcc, and this voltage Vb is applied to the second comparator.
Input to the non-inverting input terminal of _A2 . The output terminal of the comparator A ₂ is the normally closed contact X ₂ b of the relay X 2 _.
The transistor of the gate drive circuit 23 through
Since it is connected to the base of Q ₃ , when the input of the second comparator A ₂ has a relationship of Va<Vb, an “H” level signal is output from the output terminal of the second comparator A ₂ . turned on transistor _Q3 , and conversely,
When Va>Vb, an "L" level signal is output to turn off transistor _Q3 . Switching circuit 26
is constituted by an RS flip-flop FF and a transistor _Q5 , and the input terminal S on the set side of the RS flip-flop FF is connected to the output terminal of a judgment circuit 27, which will be described later and is connected to the input terminal of a comparator circuit 20. A resistor _R16 is inserted between the constant voltage power supply Vcc, and the input terminal R on the reset side is connected to the b contact side of the push button switch _S2 , and the constant voltage power supply
A resistor _R17 is inserted between the Vcc and the output terminal of the RS flip-flop FF is connected to the base of a transistor _Q5 whose emitter is grounded via a resistor _R18 , and the collector of this transistor _Q5 is connected to the constant voltage power supply Vcc. Relay X ₂ is inserted in series between the terminals of relay X ₂ , diode _{D 4} is inserted in anti-parallel between the terminals _of relay
has been inserted. The input terminal S on the set side of the RS flip-flop FF is "L".
When the input to the reset side input terminal R is at the "H" level, a signal at the "H" level is output from the output terminal of the RS flip-flop FF, causing base current to flow through the base of the transistor _Q5 . Turn on ₅ . However, when the input to the input end S of the RS flip-flop FF is at the "H" level and the input to the input end R is at the "L" level, an "L" level signal is output from the output end of the RS flip-flop FF, and the transistor Turn off _Q5 .
Further, when the inputs to both input terminals S and R are both at "H" level, the previous signal is output from the output terminal. (For example, when the output is at the "L" level, an "L" level signal is output, and when the output is at the "H" level, an "H" level signal is output). That is, the RS flip-flop FF is connected to the first and third comparators.
When the "H" level signal (Vt<Vs) is output from _A1 , _A3 , the "H" level signal is input to the set side input terminal S, and on the other hand, the "H" level signal is input to the set side input terminal R. is connected to the B contact of the pushbutton switch _S2 , so unless the pushbutton switch _S2 is turned on, an "L" level signal is input to the input terminal R on the reset side, so the output terminal of the RS flip-flop FF An "L" level signal is output from the terminal. Furthermore, when the comparators A ₁ and A ₃ output "H" level signals and the push button switch S ₂ is turned on, "H" level signals are output to both the input terminals S and R of the RS flip-flop FF. is input, and an "L" level signal is still output from the output terminal. However, “L” from comparators A ₁ and A ₃
A level (Vt>Vs) signal is output, and
When the pushbutton switch _S2 continues to be turned on, the RS
Since the set side input terminal S of the flip-flop FF receives an "L" level signal, and the reset side input terminal R receives an "H" level signal, an "H" level signal is output from the output terminal of the flip-flop FF, and the transistor outputs a "H" level signal. _Q5
It's getting turned on and working. Note that, like the amplifier circuit 20, the judgment circuit 27 is constituted by a third comparator _A3 having an open collector output.

Next, the operation will be explained.

After cleaning the private parts with 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 Fig. ₅ , the relay _X1 is energized. The normally open contact X ₁ a is closed, the blower 11 is energized and starts blowing air, and the heater 12 is energized under the control of the switching element Th. Therefore, immediately after turning on pushbutton switch _S2 , temperature sensor 1
3 is low, both inputs of the comparator circuit 20 have a relationship of Vt<Vs, and an "H" level signal is output from the output terminal of the comparator circuit 20 (Fig. 5).
_A1 output). Further, since the input of the judgment circuit 27 connected to the input terminal of the comparison circuit 20 also has the relationship of Vt<Vs like the comparison circuit 20, the judgment circuit 27
is an “H” level signal (output of _A3 in Figure 5)
is output to the set side input terminal S of the RS flip-flop FF. The reason why the determination circuit 27 outputs a signal at the "H" level is because the temperature of the hot air has not yet reached the set temperature (approximately 45° C.). On the other hand, before the pushbutton switch _S2 is turned on, the reset side input terminal R of the RS flip-flop FF is "L".
A high level signal is being input, and when the push button switch _S2 is turned on now, an "H" level signal is input to the reset side input terminal R of the RS flip-flop FF. In this case, since an "L" level signal is output from the output terminal of the RS flip-flop FF, the transistor _Q5 is not turned on. Therefore, since the relay X ₂ is not energized, the normally open contact X ₂ a remains open, cutting off the comparator circuit 20 and the gate drive circuit 23, so that the "H" level output from the comparator circuit 20 is No signal is output to the gate drive circuit 23. At this point, heater 12
energization is hardly performed. However, from the collectors of the transistors Q ₁ and Q ₂ of the zero cross detection circuit 22, a pulse signal synchronized with the zero point of the alternating current is transmitted to the base of the transistor Q ₃ of the gate drive circuit 23 and the counter of the soft start circuit 24.
The signals are sent to the DC input terminal CK and the DC input terminal CK, respectively.
(Outputs of Q ₁ and Q ₂ in Figure 5) Then, the pulse signal input to the input terminal CK of the counter DC is
For example, if the DC count setting value is set to "8", when the counter DC counts down to zero, the output terminal of the counter DC (see Figure 5)
A “L” level signal is output from CO output),
This signal is inverted by the knot circuit _N1 , and an "H" level signal is supplied from its output terminal to the base of the transistor _Q4 via the resistor _R11 , causing a base current to flow and turning on the transistor _Q4 . Therefore, the capacitor _C2 is discharged through the resistor _R13 , and when the output terminal of the counter DC is not outputting an "L" level signal, the capacitor _C2 is charged through the resistors _R12 and _R13 . From the connection point _V1 with _R13 , a sawtooth wave (the waveform shown by Va among the inputs of _A2 in FIG. 5) is output in synchronization with the zero cross of the alternating current, and one cycle is four cycles of the alternating current power supply. On the other hand, when the pushbutton switch _S2 is turned on, the capacitor _C3 connected to its a contact starts charging, and the connection point between the capacitor _C3 and the resistor _R14
From V ₂ , the constant voltage power supply Vcc gradually increases from zero volts.
A charging voltage Vb (the waveform indicated by Vb among the inputs in FIG. _5A2 ) that increases toward is output. and,
The outputs from these connection points V ₁ and V ₂ are input to the second comparator A ₂ (input of A ₂ in Fig. 5), and both inputs are
When the relationship Va>Vb exists, an “L” level signal is output from the output terminal of the second comparator _A2 , and conversely, when Va<Vb, an “H” level signal (the fifth
Figure _A2 output) is output. When an "H" level signal is output from the second comparator _A2 , this "H" level signal is sent to the gate drive circuit 23 via the normally closed contact _X2b of the relay _X2 . When the "H" level signal is sent from the second comparator _A2 to the gate drive circuit 23, the "H" level signal and the transistor Q1 of the zero cross detection circuit ₂₂ are connected to the base of the transistor _Q3 . A base current flows due to the output pulse signal and turns on transistor _Q3 . As a result,
When the light emitting diodes LED ₁ and LED ₂ of the photocoupler PC emit light and receive this light, the light receiving elements PE ₁ and PE ₂ are turned on, and a gate current flows to the gate of the switching element Th, the switching element Th is turned on. The heater 12 is energized. In this way, the second comparator _A2 of the soft start circuit 24 outputs "H".
Each time a level signal is output (output of A ₂ in Figure 5), the transistor Q ₃ of the gate drive circuit 23
By sequentially increasing the number of ON commands to switching element Th in synchronization with the zero cross of AC,
A soft start is performed by gradually increasing the amount of electricity supplied to the heater 12. (Electrification waveform in FIG. 5, 12) In this way, the heater 12 is not fully energized immediately even when the push button switch _S2 is turned on, and the temperature of the hot air is set by the soft start circuit 24. Since the amount of energization of the heater 12 is suppressed until the temperature is reached, the overshoot caused by the full energization of the heater 12 immediately after the push button switch _S2 is turned on will cause hot air with a temperature higher than the set temperature to flow. There is no ventilation.

Next, by soft-starting the energization of the heater 12 as described above, the temperature of the hot air gradually increases until it reaches the set temperature (at time t ₂ in Figure 5).
, the inputs of the comparator circuit 20 and the judgment circuit 27 have a relationship of Vt>Vs, and both circuits 20, 2
An "L" level signal is output from the output terminal of 7. “L” from the third comparator _A3 of the judgment circuit 27
When a level signal is output, this signal is input to the input terminal S on the set side of the RS flip-flop FF. At this time, since the "H" level signal is input to the reset side input terminal R of the RS flip-flop FF from the b contact of the pushbutton switch _S2 ,
“H” from the output terminal of RS flip-flop FF
A level signal is output, and base current flows to the base of transistor _Q3 , turning on transistor _Q5 . For this reason, relay X ₂ is energized and
The normally open contact X ₂ a is closed, and the normally closed contact
X ₂ b is opened to cancel the energization control of the heater 12, that is, the soft start energization.

That is, when the temperature of the hot air reaches the set temperature, the input of the judgment circuit 27 becomes the relationship of Vt>Vs as described above, so it is judged that there is no need to soft start the energization of the heater 12, and the judgment is made. A signal for canceling the soft start is output from the circuit 27 to the switching circuit 26, and the switching circuit 26
In response to a command signal from the controller, the energization control of the heater 12 is switched from soft start to normal on/off control. As a result, the signal from the second comparator _A2 that was output from the soft start circuit 24 is
By opening the normally closed contact X ₂ b of the relay X ₂ , no output is output to the gate drive circuit 23 .
However, the comparison circuit 20 and the gate drive circuit 23
By closing the normally open contact X ₂ a of the relay X ₂ , the signal output from the comparison circuit 20 can be output to the gate drive circuit 23 . Therefore, the input from the comparator circuit 20 is Vt<Vs.
When Vt≧Vs, a “H” level signal is sent to the gate drive circuit 23, and when Vt≧Vs, a “L” level signal is sent to the gate drive circuit 23.
The transistor _Q3 of the gate drive circuit 23 is turned on when the "H" level signal is output from the comparison circuit 20 and the pulse signal is output from the zero-cross detection circuit 22, and the transistor Q3 of the gate drive circuit 23 turns on and turns on the switching element Th. By turning on the heater 1
2 is performed to maintain the temperature of the hot air at the set temperature. At this time, after the RS flip-flop FF operates, an "H" level signal is input to the input terminal R on the reset side unless the push button switch _S2 is shut off, and on the other hand, the input terminal S on the set side receives the signal at the "H" level. “L” level or “H” from comparator A ₃ output terminal of 3
level signal is input (after soft start is canceled, the output of the third comparator _A3 is Vt<Vs, Vt≧
Vs), the output terminal of the RS flip-flop FF outputs an "H" level signal and keeps the transistor _Q5 on unless the pushbutton switch _S2 is shut off. Therefore,
The comparator circuit 20 and the gate drive circuit 23 remain connected, and the switching element Th is turned on by the "H" level signal from the comparator circuit 20.
The OFF control is performed, and the amount of electricity supplied to the heater 12 is controlled so that the temperature of the hot air is maintained at the set temperature. After drying the local area, press the push button switch _S2 again to stop energizing the blower 11 and heater 12.

As explained above, the temperature control device 1 of the present invention
5, when the heater 12 is energized, at the initial stage of energization, the soft start circuit 24 suppresses the amount of energization so that the heater 12 is not fully energized, and performs a soft start, so that the temperature of the hot air reaches a predetermined set temperature. When this temperature is reached, the energization of the heater 12 is switched from soft start to normal on/off control to maintain the temperature of the hot air at a constant level.
As shown in the temperature characteristic diagram in Figure 6, when the heater 12 is energized, it is possible to soft-start the energization of the heater 12 without overshooting the hot air temperature, so that when the local area is dry, the temperature is lower than the set temperature. Highly heated air is not blown out and does not cause discomfort to the user.

Although the present invention has been described with reference to an example in which it is implemented in a hot air drying device Y attached to a private parts cleaning device, the present control device 15 is not limited to this, and can be used, for example, in air towels and beauty salons. It may also be used as a hot air control device for commercial hair dryers and the like.

In addition, when energizing the heater H of the toilet seat 1, the push button switch _S3 labeled "Toilet Seat" on the top surface of the control box 3a may be pressed.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

For example, the present invention provides a soft start system for a warm air drying device that dries a private part with hot air after cleaning the private part, and performs energization control to gradually increase the amount of current to the heater when the heater starts to be energized. a circuit, a determination circuit that determines whether the temperature of the hot air has reached a predetermined set temperature, and a software that controls energization of the heater based on a command from the determination circuit when the temperature of the hot air reaches the set temperature. The structure is equipped with a switching circuit that maintains the hot air temperature at the set temperature by switching to normal on/off control from the start, so the energization control of the heater in the hot air dryer can be controlled simply at the specified temperature, unlike conventional hot air drying equipment. It is completely different from the one that maintains the set temperature by turning on and off when the set temperature is reached.
When the heater is initially energized, the amount of energization is gradually increased by a soft start circuit, and when the temperature of the hot air reaches the set temperature, the energization control of the heater is controlled by a switching circuit based on a command from a judgment circuit. Since it is possible to switch from soft start control to normal on/off control, it is possible to reliably eliminate the overshoot phenomenon that occurs when the heater is fully energized from the beginning when the heater is being energized. can. As a result, when using hot air, the temperature is close to the set temperature from the moment the heater is energized.
Alternatively, it is possible to reliably solve the problem that the hot air user feels uncomfortable due to the hot air blowing out at a temperature exceeding the set temperature.

Furthermore, in the present invention, by employing a soft start circuit, the amount of current applied to the heater at the initial stage of energization can be suppressed. Since hot air with a temperature higher than the set temperature is not blown out, even if the cleaning area is already dry and wet, it takes time for the hot air to reach the set temperature. Because there is quite a bit of extra room, there is no chance that hot air above the set temperature will hit dry areas of the body from the moment the heater is turned on, making it comfortable to dry private parts after washing. It can be carried out.

Furthermore, even if the heater is soft-started when the room temperature is extremely high or low,
If the hot air temperature is not switched to normal on/off control when it reaches a predetermined set temperature, the soft start will not be canceled even if the set temperature is exceeded, or the soft start will be canceled when the temperature is below the set temperature and an overflow may occur. However, in the present invention, by providing a judgment circuit, it is always determined whether the temperature of the hot air has reached the set temperature, and when the temperature of the hot air reaches the set temperature, the , a command is issued from the judgment circuit to the switching circuit to switch the energization control of the heater from soft start to normal on/off control;
By automatically switching the energization control of the heater to normal on/off control, the problem associated with the soft start described above can be reliably resolved. In addition to avoiding the Ute phenomenon, it is possible to comfortably control the temperature of the warm air without causing any discomfort to the users of the hot air.

Furthermore, by combining the judgment circuit and the switching circuit, the hot air temperature can be reliably switched from soft start to normal on/off control easily and automatically when the set temperature is reached. Therefore, it eliminates low-temperature burns and discomfort due to mismatched hot air temperature caused by soft start not being released, and accurately manages hot air temperature with a simple circuit configuration.
It can be carried out smoothly and well.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram embodying the configuration of FIG. 1,
FIG. 3 is a partially cutaway plan view of a toilet bowl with a private parts cleaning device according to the present invention, FIG. 4 is a side view of FIG. 3, and FIG.
Figure 6 is a time chart explaining the operation, Figure 6 is a temperature characteristic diagram of hot air obtained by the present invention, Figure 7
The figure is a conventional temperature characteristic diagram. 15...Control device, 19...Voltage-resistance conversion circuit, 20...Comparison circuit, 21...Reference value setting circuit, 22...Zero cross detection circuit, 23...Gate drive circuit, 24...Soft start circuit,
26... Judgment circuit, 27... Switching circuit.

Claims (1)

[Claims] 1. A comparison circuit that compares a signal from a temperature sensor that detects the temperature of the hot air with a signal from a reference value setting circuit that sets the set temperature of the hot air; and a comparison circuit that compares the signal from the comparison circuit. , a gate drive circuit that controls energization to the heater based on an output signal from the comparison circuit, and a gate drive circuit that suppresses a signal from the gate drive circuit regardless of the output signal from the comparison circuit at the beginning of energization to the heater. a soft start circuit that suppresses energization to the heater by controlling the temperature; a circuit that determines whether the signal from the temperature sensor reaches the set temperature; and further, when the temperature of the hot air reaches the set temperature; 1. A temperature control device for a hot air drying device, comprising a switching circuit for switching to normal on/off control without suppressing energization to a heater by a soft start circuit.