JP3041756B2 - Sanitary washing equipment - Google Patents

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,
In particular, the present invention relates to a sanitary washing device that blows warm air at a temperature set by a user as warm air for drying a wet portion of a human body.

[0002]

2. Description of the Related Art Conventionally, this type of sanitary washing apparatus has a configuration as shown in FIG. FIG. 5 is a plan view of the sanitary washing device, and 1 includes a motor 1a, a fan 1c that rotates according to the driving of the motor 1a, and a heater 1b that heats the air blown from the fan 1c and blows hot air. Drying unit, 2 is a room temperature sensor for detecting room temperature,
Reference numeral 3 denotes a switch unit having a drying switch 3a for instructing a user to start / stop blowing of hot air and a temperature setting switch 3b for the user to set a hot air temperature. The control unit controls the motor 1a and the heater 1b in accordance with the operation.

FIG. 6 is a block diagram of a sanitary washing apparatus, in which the same parts as those described above are denoted by the same reference numerals. In the control unit 5 shown in FIG. 6, reference numeral 6 denotes a power supply unit for generating a DC voltage for driving the motor 1a and DC voltages for various control circuits from the commercial power supply 4, and 7 drives the motor 1a with the DC voltage from the power supply unit 6. A drying motor driving unit, 8 is a drying heater driving unit that drives the heater 1b by the commercial power supply 4, and 9 is a heater control amount calculated from the room temperature detected by the room temperature sensor 2 according to a user's operation of the switch unit 3. The CPU controls the drying motor driving unit 7 and the drying heater driving unit 8 based on the heater control amount, and blows hot air at a set temperature from the motor 1a and the heater 1b.

Now, when the user operates the drying switch 3a, the CPU 9 detects this and instructs the drying motor driving section 7 to start driving the motor 1a. Next, the current room temperature TA is detected by the room temperature sensor 2, the set temperature TS of the hot air is detected by the temperature setting switch 3b, and the heater control amount is obtained from the temperature difference between these temperatures and the calorie supply capacity TH of the drying unit 1. Is calculated. Here, when the room temperature TA = 20 ° C. and the set temperature TS = 50 ° C.,
The supply heat amount TV required for the temperature rise is as follows: TV = TS-TA = 30 deg.

The heat supply capacity TH of the drying unit 1
However, in the case where the heat quantity of 60 deg can be supplied at the time of 100% driving, the supplied heat quantity TV (= 30 deg) can be supplied with half the heat quantity supply capacity. Therefore, the ratio of using the heat supply capacity TH of the drying unit 1, that is, the heater control amount P can be expressed as P (%) = TV / TH = (TS-TA) / TH. P becomes P = (50−20) / 60 = 50%.

The CPU 9 outputs the calculated heater control amount P to the drying heater driving unit 8, and the drying heater driving unit 8 supplies the heater 1b with commercial power for a period of P% of the cycle t based on the heater control amount P. The power supply 4 is supplied, and the supply is stopped during other periods. FIG. 7 shows the heater 1 by the drying heater driving unit 8.
6B is a timing chart showing the drive control of FIG.
Is a heater control amount P = 30%, (b) is a heater control amount P = 50%, and (c) is a heater control amount P = 70%.
In the case where the heater control amount P is 50% as described above, the heater 1b is driven by 50% (0.5t) of the cycle t to heat the air.

[0007]

Therefore, in such a conventional sanitary washing device, the warm air having a temperature set by the user is affected by fluctuations in the commercial power supply, variations in the heater resistance value, and variations in the motor speed. There is a problem that cannot be supplied accurately. The amount of heat supplied from the heater 1b is determined by the power consumption W in the heater 1b. When the primary voltage of the commercial power supply 4 is V, the resistance of the heater 1b is R, and the current flowing through the heater 1b is I. , And the power consumption W is as follows: W = V ² / R = VI

Here, it is generally assumed that the primary voltage V of the commercial power supply 4 has a certain degree of variation, for example, about ± 10% with respect to 100 V. According to the above equation, the primary voltage V If the primary voltage V is relatively low, the power consumption W increases, the amount of heat supplied from the heater 1b increases, and hot air having a temperature higher than the set temperature is supplied. Since the power W also decreases, the amount of heat supplied from the heater 1b decreases, and hot air at a temperature lower than the set temperature is supplied. There has been a problem that the temperature changes and the user feels uncomfortable.

Similarly, the resistance R of the heater 1b is
The heater 1b has a variation in production, for example, about ± 5%. In the heater 1b having a relatively low resistance value R, the power consumption W increases due to the increase in the current I, and the amount of heat supplied from the heater 1b increases. In other words, hot air having a temperature higher than the set temperature is supplied, and in the heater 1b having a relatively high resistance value R, the power consumption W is reduced due to the decrease in the current I, and the amount of heat supplied from the heater 1b is also reduced. Since the hot air at a temperature lower than the set temperature is supplied, even if the set temperature is fixed, the temperature of the hot air changes due to the variation in the resistance value R of the heater 1b, giving a user discomfort. There was a problem.

Further, when a DC motor is used as the motor 1a, the rotation speed varies with respect to a predetermined voltage.
For example, the motor 1a has a variation of about ± 10%, and the rotation speed is relatively low with respect to the supplied voltage.
As a result, the amount of air supplied to the heater 1b is reduced, and warm air having a temperature higher than the set temperature is supplied. In the motor 1a having a relatively high rotation speed with respect to the supplied voltage, the fan 1c supplies the heater 1b with the fan 1c. Since the amount of supplied air increases and warm air having a temperature lower than the set temperature is supplied, even if the set temperature is fixed, the temperature of the hot air changes due to the variation in the rotation speed of the motor 1a, and There is a problem of giving discomfort to the user.

When an AC motor is used as the motor 1a, its rotation speed is substantially constant because it depends on the frequency of the commercial power supply 4. However, it is more expensive than a DC motor and controls the driving of the AC motor. The circuit parts constituting the drying motor driving unit 7 for the purpose are also expensive. The present invention is intended to solve such a problem, and automatically corrects an error of a hot air temperature due to a variation in a primary voltage, a variation in a resistance value of a heater or a variation in a rotation speed of a motor, and adjusts the temperature to a set temperature. It is an object to provide a sanitary washing device that supplies equal warm air.

[0012]

In order to achieve such an object, a sanitary washing apparatus according to the present invention is provided with a motor for driving a fan for blowing air, and a fan driven by a predetermined power supply voltage and blown by the fan. A hot air drying unit comprising a heater for heating air and having a calorific value supply capacity for supplying a predetermined amount of heat when a rated voltage is supplied as a power supply voltage; and a heater voltage value detecting unit for detecting a voltage supplied to the heater And calculating a heater control amount indicating a ratio of a heater energizing time from a difference between a predetermined set temperature and a room temperature and a calorific value supply capacity, and based on the voltage value and the rated voltage detected by the heater voltage value detecting means. The control device includes a control unit that corrects the control amount and a heater driving unit that drives the heater based on the corrected heater control amount.
A motor that drives a fan that blows air, and a heater that heats the air blown by the fan, has a heat amount supply capacity to supply a predetermined amount of heat when the heater has a rated resistance value. Air drying means, heater current value detecting means for detecting current supplied to the heater, and calculating a heater control amount indicating a ratio of a heater energizing time from a difference between a predetermined set temperature and room temperature and a calorific value supply capacity. Control means for correcting the heater control amount based on the heater resistance value and the rated resistance value calculated from the current value detected by the heater current value detection means, and heater driving means for driving the heater based on the corrected heater control amount Is provided. Further, it comprises a motor for driving a fan for blowing air, and a heater for heating the air blown by the fan, and has a calorie supply capacity for supplying a predetermined amount of heat when a rated rotational speed is obtained as the rotational speed of the motor. Having a hot air drying means, a motor rotation number detecting means for detecting the number of rotations of the motor, and calculating a heater control amount indicating a ratio of a heater energization time from a difference between a predetermined set temperature and room temperature and a heat supply capacity. Control means for correcting the heater control amount based on the rotation speed detected by the motor rotation speed detection means and the rated rotation speed, and heater driving means for driving the heater based on the corrected heater control amount. .

[0013]

Accordingly, the control means calculates the heater control amount indicating the ratio of the heater energizing time from the difference between the predetermined set temperature and the room temperature and the heat supply capacity, and the voltage detected by the heater voltage value detecting means. The heater control amount is corrected based on the value and the rated voltage, and the heater is driven based on the corrected heater control amount. Also, by the control means,
A heater control amount indicating a ratio of a heater energizing time is calculated from a difference between a predetermined set temperature and room temperature and a calorific value supply capacity, and a heater resistance value and a rating calculated from a current value detected by a heater current value detecting unit. The heater control amount is corrected based on the resistance value, and the heater is driven based on the corrected heater control amount. Further, the control means calculates a heater control amount indicating a ratio of a heater energizing time from a difference between a predetermined set temperature and room temperature and a heat amount supply capacity, and also calculates a rotation speed and a rating detected by the motor rotation speed detection means. The heater control amount is corrected based on the rotation speed, and the heater is driven based on the corrected heater control amount.

[0014]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a sanitary washing apparatus according to one embodiment of the present invention, in which the same or equivalent parts as those described above are denoted by the same reference numerals. In the control unit 5, reference numeral 12 denotes a motor rotation speed detection unit (motor rotation speed detection unit) for detecting the rotation speed of the motor 1a in the drying unit 1 (hot air drying unit), and reference numeral 13 denotes a heater 1b in the drying unit 1
A heater current value detecting section (heater current value detecting means) for detecting a current flowing through the heater; a primary voltage value detecting section (heater voltage value detecting means) for detecting a primary voltage supplied to the heater 1b from the commercial power supply 4; Are the number of rotations of the motor 1a detected by the motor rotation number detector 12, the current value flowing through the heater 1b detected by the heater current value detector 13, and the primary voltage of the commercial power supply 4 detected by the primary voltage value detector 14. The heater control amount is corrected based on the voltage value, and the heater 1 is supplied to the drying heater driving unit 8 by the corrected heater control amount.
CPU (control means) for instructing the drive control of b.

FIG. 2 is a circuit diagram showing the primary voltage detecting unit 14. FIG. 2A shows a case where the commercial power supply 4 and the control unit 5 are insulated by using a transformer (current transformer) CT.
Indicates a case where insulation is performed using a photocoupler PC. In FIG. 2A, RP is a fixed resistance,
A current IP corresponding to the primary voltage V of the commercial power supply 4 flows through the transformer CT. Assuming that the conversion rate of the transformer CT is n, the secondary current IS of the transformer CT is as follows: IS = n.IP = n. (V / Rp).

Further, as the secondary voltage VS, VS = RS.IS = RS.n. (V / RP) is generated at both ends of the secondary-side fixed resistor RS. A / A which is stabilized and is one of the input ports of the CPU 11
The primary voltage V is calculated from the secondary voltage VS input to a D input port, that is, a port provided with means for converting an analog signal to a digital value.

In FIG. 2B, a photocoupler PC
Is connected to a commercial power supply 4 via a fixed resistor RP.
, And a primary current IP corresponding to the primary voltage V of the commercial power supply 4 flows. Assuming that the current-to-voltage conversion rate of the photocoupler PC is A, VS = ASIP = A ・ (V / RP) is generated on the secondary side (phototransistor) of the photocoupler PC as the secondary voltage VS. After being stabilized, the CPU 11
Of the secondary voltage V input to the A / D input port of
A primary voltage V is calculated from S.

FIG. 3 is a circuit diagram showing the heater current value detecting section 13. In FIG. 3, the primary side of a transformer CT (current transformer) is connected via a heater 1b having a resistance value R and a drying heater driving section 8. It is connected to the commercial power supply 4.
Here, since the drying heater driving unit 8 controls ON / OFF of the current supply to the heater 1b, the resistance in the drying heater driving unit 8 can be ignored, and the primary current IP flowing to the primary side of the transformer CT can be ignored. Becomes IP = R · V.

Here, assuming that the conversion rate of the transformer CT is n, the secondary current IS and the secondary voltage VS are calculated as follows: IS = n · IP = n · R · V VS = RS · IS = RS · n · R · V, which is rectified by the diode D, stabilized by the capacitor C, and input to the A / D input port of the CPU 11,
The resistance value R of the heater 1b is calculated from the input secondary voltage VS. The primary current IP supplied to the heater 1b
Is supplied only for a predetermined period according to the heater control amount, and the CPU 11 detects a signal from the heater current value detection unit 13 during a period when the primary current is supplied.

FIG. 4 is a circuit diagram showing the motor rotation number detecting unit 12. Reference numeral 41 denotes a disk unit provided with a slit unit for allowing light from the primary side (LED) of the photointerrupter PI to pass therethrough. Rotating disk member, PI
Is a photointerrupter, which constitutes a rotary encoder. LE of Photointerrupter PI
D is always supplied with a predetermined current via a fixed resistor RP, and emits light to the secondary-side phototransistor. A disk member 41 is provided between the LED of the photointerrupter PI and the phototransistor. The disk member 41 rotates according to the rotation of the motor 1a, and light passing through the slit portion is detected by the phototransistor.
A pulse corresponding to the rotation speed of the motor 1a is input to the input port of the CPU 11 pulled up by the fixed resistor RS, and the rotation speed of the motor 1a is calculated based on the input pulse number.

Next, the operation of the present invention will be described with reference to FIG. First, in response to the operation of the drying switch 3a by the user, the CPU 11 instructs the drying motor driving unit 7 to start driving the motor 1a, and the drying motor driving unit 7 outputs the DC voltage from the power supply unit 6 to the motor 1a. To start driving. Next, the CPU 11 detects the current room temperature TA by the room temperature sensor 2, detects the set temperature TS of the hot air from the temperature setting switch 3b, and determines the heater temperature based on the temperature difference between these temperatures and the calorie supply capacity TH of the drying unit 1. The control amount is calculated, and the heater control amount P is calculated in the same manner as described above. P (%) = TV / TH = (TS-TA) / TH

Next, the CPU 11 operates the primary voltage detecting section 14.
The primary voltage Vb supplied from the commercial power supply 4 to the heater 1b via the power supply 4 is detected, and the rated primary voltage Va serving as a reference when the heater 1b supplies a heat quantity corresponding to the heat quantity supply capacity TH.
(For example, 100 V), the calculated heater control amount P is corrected. Here, since the amount of heat supplied from the heater 1b is proportional to the power consumption W in the heater 1b, that is, proportional to the square of the primary voltage supplied to the heater 1b, P = P · (Va ² / Vb ² ) · XV. Note that XV is a correction coefficient at the time of correction based on the primary voltage, and the square ratio of the primary voltage (Va ² / Vb ² )
May be calculated on the basis of the correction and the actual measurement value, and may be used as needed.

The CPU 11 includes a motor rotation speed detecting unit 1.
2, the rotation speed rb of the motor 1a is detected,
The calculated heater control amount P is corrected based on the rated rotational speed ra of the motor 1a, which is a reference when b supplies a heat amount according to the heat amount supply capacity TH. Here, since the amount of heat supplied from the heater 1b changes according to the ratio of the number of revolutions of the motor 1a, it is corrected by P = P ・ (rb / ra) ・ Xr. Xr is a correction coefficient at the time of correction based on the motor rotation speed, and may be calculated based on the correction based on the rotation speed ratio (rb / ra) and the actually measured value, and may be used as needed.

Further, the CPU 11 determines the current value of the heater 1b from the current value flowing through the heater 1b through the heater current value detection unit 13.
Is detected, and the heater 1b detects the heat amount supply capacity TH.
Resistance value R, which is a reference when supplying the amount of heat according to
Based on a, the calculated heater control amount P is corrected. Here, the amount of heat supplied from the heater 1b is proportional to the power consumption W in the heater 1b,
Is inversely proportional to the resistance value, the correction is made by P = PＰ (Rb / Ra) ・ XR.

XR is a correction coefficient at the time of correction based on the heater resistance value, and may be calculated based on the correction based on the resistance ratio (Rb / Ra) and the measured value, and may be used as needed. In addition, by using the value detected through the primary voltage value detection unit 14 as the primary voltage V of the commercial power supply 4 used when calculating the resistance value Rb of the heater 1b, the resistance value Rb of the heater 1b can be more accurately determined. Can be calculated,
The heater control amount P can be corrected with higher accuracy.

After correcting the calculated heater control amount P in this way, the CPU 11 outputs the corrected heater control amount P to the drying heater driving unit 8, and the drying heater driving unit 8, as shown in FIG.
Based on the heater control amount P, the commercial power supply 4 is supplied to the heater 1b only for a period of P% of the cycle t, and the supply is stopped during the other periods, thereby driving and controlling the heater 1b.

Accordingly, a motor rotation detector 12 for detecting the number of rotations of the motor 1a, a heater current value detector 13 for detecting a current flowing through the heater 1b, and a primary voltage value detector 14 for detecting a primary voltage of the commercial power supply 4 are provided. The CPU 1 detects the motor 1 detected by the motor rotation speed detection unit 12 by the CPU 11.
The heater based on the rotation speed of the heater a, the resistance value of the heater 1b based on the current value flowing through the heater 1b detected by the heater current value detection unit 13, and the primary voltage value of the commercial power supply 4 detected by the primary voltage value detection unit 14. Since the control amount is corrected and the driving control of the heater 1b is instructed to the drying heater driving unit 8 by the corrected heater control amount, the fluctuation of the primary voltage, the variation of the resistance value of the heater, or the rotation speed of the motor is reduced. The error of the hot air temperature due to the variation is automatically corrected, and the hot air equal to the set temperature is supplied.

In the above description, as a correction for the heater control amount P obtained from the room temperature and the set temperature, the fluctuation of the primary voltage of the commercial power supply 4, the fluctuation of the resistance value of the heater 1b, and the fluctuation of the rotation speed of the motor 1a. Although the case where the correction is performed based on the above is described, the correction may be performed by using any one of these or an arbitrary combination as necessary, and the heater control amount may be corrected by a simpler configuration. This makes it possible to accurately supply hot air at a temperature desired by the user.

[0029]

As described above, according to the present invention, the heater voltage value detecting means for detecting the voltage value supplied to the heater is provided, and the difference between the predetermined set temperature and the room temperature and the amount of heat supply are provided by the control means. The heater control amount indicating the ratio of the heater energization time is calculated from the capacity, and the heater control amount is corrected based on the voltage value and the rated voltage detected by the heater voltage value detecting means, and based on the corrected heater control amount. Since the heater is driven, it becomes possible to stably supply hot air having a temperature equal to the temperature set by the user even when the commercial power supplied to the heater fluctuates.

Further, a heater current value detecting means for detecting a current supplied to the heater is provided, and the control means indicates a ratio of a power supply time of the heater based on a difference between a predetermined set temperature and room temperature and a heat supply capability. The control amount is calculated, the heater control amount is corrected based on the heater resistance value and the rated resistance value calculated from the current value detected by the heater current value detection means, and the heater is driven based on the corrected heater control amount. As a result, even when the resistance value of the heater itself varies, it is possible to stably supply hot air having a temperature equal to the temperature set by the user.

Further, a motor rotation speed detecting means for detecting the rotation speed of the motor is provided, and the control means controls the heater control amount indicating the ratio of the energizing time of the heater based on the difference between a predetermined set temperature and room temperature and the heat supply capability. And the heater control amount is corrected based on the rotation speed detected by the motor rotation speed detection means and the rated rotation speed, and the heater is driven based on the corrected heater control amount. Even when the number varies, it is possible to stably supply hot air having a temperature equal to the set temperature set by the user.

[Brief description of the drawings]

FIG. 1 is a block diagram of a sanitary washing device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of a primary voltage value detector of FIG. 1;

FIG. 3 is a circuit diagram of a heater current value detector of FIG. 1;

FIG. 4 is a circuit diagram of a motor rotation speed detecting unit in FIG. 1;

FIG. 5 is a plan view of a general sanitary washing device.

FIG. 6 is a circuit diagram of a conventional sanitary washing device.

FIG. 7 is a timing chart showing heater drive control based on a heater control amount.

[Explanation of symbols]

1. Drying unit (hot air drying means), 1a motor, 1b
Heater, 2 room temperature sensor, 3 switch section, 3a drying switch, 3b temperature setting switch, 4 commercial power supply, 5 control section, 6
Power supply unit, 7 drying motor drive unit, 8 drying heater drive unit (heater drive unit), 11 CPU (control unit), 12 motor rotation speed detection unit (motor rotation speed detection unit), 13 heater current value detection unit (heater current value) Detecting means), 14 primary voltage value detecting section (heater voltage value detecting means).

Claims (3)

(57) [Claims] 1. A sanitary washing device for drying a human body wet portion by blowing hot air, wherein the motor drives a fan that blows air, and the air that is driven by a predetermined power supply voltage and blows by the fan. A hot air drying unit comprising a heater for heating, having a calorie supply capability of supplying a predetermined amount of heat when a rated voltage is supplied as the power supply voltage; and a heater voltage value detecting unit for detecting a voltage supplied to the heater. And calculating a heater control amount indicating a ratio of an energization time of the heater at the time of supply of a rated voltage from a difference between a predetermined set temperature and room temperature and the calorie supply capability, and a voltage detected by the heater voltage value detecting means. and a control means for correcting the heater control variable when the rated voltage supply based on the value and the rated voltage, corrected said heater control variable Sanitary washing device, characterized in that it comprises a heater driving means on the basis of driving the heater. 2. A sanitary washing device for drying a human body wet portion by blowing hot air, comprising: a motor for driving a fan for blowing air; and a heater for heating air blown by the fan.
A hot air drying unit having a calorific value supply capacity for supplying a predetermined amount of heat when the heater has a rated resistance value as a resistance value; a heater current value detecting unit for detecting a current supplied to the heater; A heater control amount indicating a ratio of a current supply time of the heater is calculated from a difference between a temperature and a room temperature and the heat amount supply capability, and a heater resistance value calculated from a current value detected by the heater current value detection unit and the rated value are used. A sanitary washing device comprising: a control unit that corrects the heater control amount based on a resistance value; and a heater driving unit that drives the heater based on the corrected heater control amount. 3. A sanitary washing device for drying a human body wet part by blowing hot air, comprising: a motor for driving a fan for blowing air; and a heater for heating air blown by the fan.
A hot air drying unit having a calorific value supply capacity for supplying a predetermined amount of heat when a rated rotational speed is obtained as a rotational speed of the motor; a motor rotational speed detecting unit for detecting a rotational speed of the motor; Based on the difference between the temperature and the room temperature and the calorie supply capacity, a heater control amount indicating the ratio of the energization time of the heater is calculated, and based on the rotation speed detected by the motor rotation speed detection means and the rated rotation speed, A sanitary washing device comprising: a control unit that corrects a heater control amount; and a heater driving unit that drives the heater based on the corrected heater control amount.