JPH1136411A - Human private part washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a human private part washing device, which washes the human private parts with hot water with forcibly entrained air, to optimize the amount of air entrained and enhance the operational reliability of an air pump. SOLUTION: This device comprises: a hot water tank 13 to which a feed water pipe 10 and a hot water pipe 18 are connected and which has a heater 15 therein; a solenoid shutoff valve 11; a flow control valve 12; a nozzle 19; an air pump 21 forcibly entraining air into wash water; an air-pump DC motor 20 driving the air pump 21; and a controller 22. The controller 22 rotates the air-pump DC motor 20 by application of a pulse voltage, enabling the amount of entrained air to be varied over a wide range and providing comfortable washing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cleaning a local part of a human body such as a toilet seat for washing with hot water.

[0002]

2. Description of the Related Art A conventional human body local cleaning apparatus of this type is shown in FIG.
No. 41).

FIG. 9 is a schematic diagram showing a cleaning water supply system. In FIG. 9, reference numeral 1 denotes a water pump, and a water supply pipe 2 is connected to an upstream side of the water pump 1, and a hot water tank 4 having a heater 3 therein is connected to a downstream side thereof.

Further, on the downstream side, the flow path branches,
Electromagnetic valves 5 and 6 for switching channels and washing nozzles 7 and 8 are connected to each of the branched channels. In addition, hot water tank 4
An air pump 9 is connected to the downstream side of the water supply line and the upstream side of the flow path branch portion, so that air can be mixed into the hot water supplied from the hot water tank 4.

[0005] With this configuration, the cleaning water supplied from the water supply pipe 2 is pressurized and supplied by the water pump 1 so that the cleaning water heated and stored inside the hot water tank 4 is pushed out.
Further, the electromagnetic valve 6 and the electromagnetic valve 7 selectively communicate a flow path leading to the cleaning nozzle 8 or the cleaning nozzle 9, so that cleaning water is selectively jetted from either the cleaning nozzle 8 or the cleaning nozzle 9. . At this time, since the air pump 9 forcibly mixes air into the cleaning water, the cleaning nozzle 8 or the cleaning nozzle 9 blows out the cleaning water containing bubbles and excellent in bodily sensation.

[0006]

According to the above-mentioned conventional structure, the washing water containing bubbles can be obtained with the excellent washing feeling. However, in the case of cleaning a local part of the human body with a gas-liquid mixed flow as in the conventional example, when changing the flow rate, a large variable width is required for the outputs of the motors driving the water pump and the air pump. In other words, in the case of the gas-liquid mixed flow, the pipe friction coefficient of the fluid is significantly increased as compared with the case where only the liquid passes through the same flow path. Is very different,
As a result, the discharge pressure required for the water pump and the air pump changes significantly. For this reason, an inexpensive brushed DC motor is generally used as a means for driving the water pump or the air pump. However, it is necessary to make the variable width of the voltage applied to the motor very large. Within the operating voltage range, there arises a problem that an optimum discharge flow rate of cleaning water or air cannot be obtained. In addition, there is a problem that the motor cannot be started particularly in a use state where the applied voltage is low, and in particular, in the case of a motor using a carbon brush, there is an inconvenience in shortening the life of the motor due to a rare short circuit due to carbon accumulation. Further, since the flow rates of the washing water and the air mutually affect the pressure loss of the washing flow path, there is a problem that it is very difficult to optimize the flow rates of the washing water and the air. In other words, since the pipe friction coefficient changes greatly depending on the volume ratio of washing water and air, each flow rate depends on the change in pressure loss,
It is very difficult to vary the total flow rate while maintaining the optimum mixing ratio of washing water and air.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a heating means to which a water supply pipe and a hot water pipe are connected, a water supply control means for controlling water supply to the heating means, and a hot water supply means. A discharge means connected to the pipe for discharging washing water to a human body, an air pump for forcibly mixing air into the washing water, a DC motor for an air pump with a brush for driving the air pump, and a pulse voltage applied By doing so, a controller for rotating the DC motor for the air pump is provided. By forcibly mixing air into the washing water, the amount of washing water can be greatly reduced, and water saving and power consumption can be reduced. Furthermore, since the controller drives the DC motor for the air pump by applying a pulse voltage, the variable width of the amount of air to be mixed can be set larger than that of driving at a constant voltage, and low-speed driving can be performed for a long time. Even if the cleaning is performed, it is possible to avoid situations such as the inconvenience of carbon deposition, etc. As a result, comfortable cleaning can be realized and the reliability of the equipment is greatly improved by maintaining the optimal mixing ratio of cleaning water and air. You can do it.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A human body local cleaning apparatus according to a first aspect of the present invention includes a heating means to which a water supply pipe and a hot water pipe are connected, a water supply control means for controlling water supply to the heating means, A discharge means connected to the pipe for discharging washing water to a human body, an air pump for forcibly mixing air into the washing water, a DC motor for an air pump with a brush for driving the air pump, and a pulse voltage applied By doing so, a controller for rotating the DC motor for the air pump is provided. In addition, air bubbles are forcibly mixed into the hot water supplied from the heating means to save water and power, and the controller drives the air pump DC motor with a pulse voltage to reduce the variable width of the air mixing amount. The present invention realizes cleaning with a wide and optimal amount of cleaning water.

A human body cleaning apparatus according to a second aspect of the present invention, in addition to the configuration of the first aspect, wherein the heating means comprises an instantaneous heat exchanger comprising a heater and a heating flow path. It is. In addition, air is forcibly mixed into the washing water to greatly reduce water consumption, and the instantaneous heating means realizes a significant reduction in power consumption. In addition, by greatly changing the amount of air mixed into the washing water, it is possible to cover a variable width of washing strength that cannot be compensated for by a small amount of washing water that can be supplied by an instantaneous heat exchanger. It is.

[0010] In the third aspect of the present invention, the human body local cleaning apparatus further comprises a flow rate setting means in addition to the configuration of the first or second aspect of the present invention, and a controller sets the cleaning water amount by the flow rate setting means. D for air pump with brush in conjunction with
The duty ratio of the pulse voltage applied to the C motor is varied. Then, the amount of air to be mixed is varied according to the setting of the amount of washing water, and the ratio of the amount of washing water to the amount of air mixed is always optimized.

According to a fourth aspect of the present invention, in addition to the configuration of the first or second aspect, the water supply control means varies the flow rate of the cleaning water to be supplied in accordance with the number of revolutions. It is a water pump that can be used, and the controller operates in conjunction with the rotation speed control of the water pump.
The duty ratio of the pulse voltage applied to the C motor is varied. Then, the flow rate of the supplied washing water is adjusted by the water pump, so that the set washing flow rate is always obtained irrespective of the pressure of the washing water supplied to the water supply pipe. By varying the amount of air mixed in, the ratio between the amount of washing water and the amount of air mixed can always be kept optimal.

A fifth aspect of the present invention provides the apparatus for cleaning a local part of a human body in addition to the configuration of the first or second aspect of the present invention, further comprising a flow rate detecting means for detecting an amount of cleaning water. The duty ratio of the pulse voltage applied to the DC motor for the brush-equipped air pump is varied in conjunction with the detected flow rate of the means. By controlling the amount of air entrainment in accordance with the flow rate detected by the flow rate detecting means, the ratio between the amount of washing water and the amount of air entrainment can be kept more optimal.

According to a sixth aspect of the present invention, in addition to the first to fifth aspects of the present invention, the controller for the human body local cleaning apparatus further comprises a controller for starting the DC motor for the brush-equipped air pump until a predetermined time elapses. The duty ratio of the pulse voltage is set to 100%. Even when the duty ratio of the applied pulse voltage is low, the self-starting of the DC motor for the air pump is ensured, and even if the DC motor is of a carbon brush type, the deposition of carbon is prevented, and the DC for the air pump is prevented. This is to improve the reliability of the motor.

According to a seventh aspect of the present invention, there is provided a human body local cleaning apparatus according to the first to sixth aspects, wherein the water supply control means includes a water pump, and a water pump with a brush for driving the water pump. The DC pump for the water pump is configured by applying a pulse voltage.
This is configured by rotating a motor. The controller drives the DC motor for the water pump with a pulse voltage, thereby expanding the variable range of the discharge pressure of the water pump, and changing the pressure loss of the washing water flow path when the ratio of the washing water amount to the air mixing amount changes. The ratio of the amount of washing water and the amount of air entrainment can be kept optimal.

An eighth aspect of the present invention provides the apparatus for cleaning a local part of a human body according to the seventh aspect of the present invention, further comprising a flow rate detecting means for detecting the amount of washing water, and a controller for detecting the flow rate of the flow rate detecting means. Based on this, the duty ratio of the brush-equipped DC motor for the water pump is corrected. By compensating for changes in the amount of washing water due to variations in water pumps and aging, it is possible to maintain a constant flow rate of washing water to be supplied, and to always maintain a constant ratio between the amount of washing water and the amount of air entrapment. is there.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Embodiment 1) FIG. 1 is a schematic structural view of a human body cleaning apparatus showing a first embodiment of the present invention. A water supply pipe 10 for supplying washing water is provided with a water stop solenoid valve 1 as water supply control means.
1. Through a flow control valve 12, it is connected to an inlet 14 of a hot water tank 13, which forms a part of the heating means. Hot water tank 1
3 has a heater 15 and a thermistor 1 for detecting the temperature of hot water in the hot water tank 13, which also form part of the heating means.
6 are provided internally. The outlet 1 of the hot water tank 13
7 is connected to a nozzle 19 as a discharge means via a hot water pipe 18. The hot water pipe 18 is partially branched, and is connected to an air pump 21 driven by an air pump DC motor 20. It should be noted that the DC motors referred to here all refer to types with brushes. The controller 22 is electrically connected to the thermistor 16, the water shutoff electromagnetic valve 11, the heater 15, the flow control motor 23 fixed to the flow control valve 12, and the DC motor 21 for the air pump. Further, the controller 22 exchanges signals using infrared rays with a remote controller 27 as a flow rate setting means including a cleaning switch 24, a stop switch 25, a variable flow rate switch 26, and the like. This is done by the respective input switches provided at 27.

The operation of this embodiment in the above configuration will be described. First, when the user presses the cleaning switch 24 provided on the remote controller 27, the water stop electromagnetic valve 11 is opened, and the cleaning water is supplied from the water supply pipe 10. The washing water supplied here passes through a flow control valve 12 and is then supplied to a hot water tank 13.
Flows into the interior. At this time, the controller 22
The flow control valve 12 is controlled so as to match the setting of the variable flow switch 26 provided in the above, and the flow rate of the washing water is adjusted. In addition,
In the hot water tank 13, cleaning water heated and maintained at an appropriate temperature by the controller 22 controlling the energization of the heater 15 based on a temperature signal from the thermistor 16 is stored, and the cleaning water flows in from the inlet 14. As a result, a considerable amount of warm water is pushed out from the outlet 17. The extruded washing water reaches the nozzle 19 through the hot water pipe 18 and is ejected toward the human body. Simultaneously with this washing water supply operation, the controller 22 applies a pulse voltage to the air pump DC motor 20 to drive it. As a result, air is forcibly mixed into the hot water pipe from the air pump 20, and washing water containing a large amount of air bubbles is ejected from the nozzle 19. In the case of washing with the hot water mixed with air, the improvement of the jetting speed of the washing water from the nozzle 19 due to the forced mixing of the air and the action of popping bubbles cause the cleaning to be performed in comparison with the conventional cleaning using only hot water. In addition, it is possible to perform cleaning with less than half the amount of cleaning water without impairing the cleaning effect and the user's bodily sensation. This not only saves water, but also greatly reduces the amount of power required to boil the washing water to an appropriate temperature.

Here, the pulse voltage applied to the DC motor 20 for the air pump by the controller 22 will be described with reference to FIG. First, the user presses the cleaning switch 24 provided on the remote controller 27, and at substantially the same time when the cleaning water is supplied by the operation of the water circuit, the controller 22 sets the air pump D
The pulse voltage application to the C motor 20 is started. This pulse voltage has a predetermined cycle, and the upper limit of the voltage is the rated voltage of the DC motor 20 for the air pump. At the time of start-up, the state of 100% duty ratio is maintained for a predetermined period.
Is changed to a predetermined energization rate in accordance with the set flow rate input by. The controller 22 includes a variable flow switch 26.
When the input of the decrease in the amount of washing water is made, the duty ratio of the pulse voltage applied to the air pump DC motor 20 is reduced to a predetermined value, as shown in FIG. However, when an input of an increase in the amount of cleaning water is input, control is performed so that the duty ratio increases. Here, a graph showing the pipe friction coefficient of the gas-liquid two-layer flow is attached to FIG. 3 for reference. In FIG. 3, the X axis is the volume ratio f ₁ occupied by the liquid layer.
, And the Y axis represents (gas-liquid two-layer flow tube friction coefficient λ _TP / liquid single-layer pipe friction coefficient λ ₁ ). As is clear from FIG.
The value of the pipe friction coefficient of the gas-liquid two-layer flow is greatly increased as compared with the case of the liquid single phase. Therefore, also in the water circuit in the present embodiment, the pressure loss in the flow path greatly changes with the variation of the washing water amount, and the flow rate of the air pump 21 naturally decreases as the pressure load increases. The variable width of the number of rotations required for the motor 20 is inevitably very large as compared with the conventional case of washing only with warm water. Therefore, when driving the DC motor 20 for the air pump at a constant voltage, the operating voltage may exceed an appropriate operating voltage range, or the voltage may be set too low, especially at a small flow rate, to make it impossible to start, or to deposit carbon. This may cause the reliability of the motor to be significantly reduced. However, when the controller 22 drives the air pump DC motor 21 in a pulsed manner, the variable width of the air pump DC motor 20 particularly at the time of low-speed rotation is greatly expanded. The variable width of the amount can be greatly expanded. As a result, it is possible to realize cleaning with an optimal amount of air mixing from a small flow rate to a large flow rate. In addition, the energization rate is 100% for a predetermined number of pulses at startup.
Is maintained, the air pump DC motor 21
In addition to ensuring the start-up of the motor, it is also effective for removing the deposited carbon, and can significantly improve the reliability of the motor. Here, the remote controller 27 has been described as the flow rate setting unit. However, the remote controller 27 is not limited to the remote controller using infrared rays, and various switches such as a switch provided on the body cleaning device of the human body, a wired remote controller, and a remote controller using other communication means may be used. Flow setting means is conceivable.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to FIG. The water supply pipe 10 for supplying the washing water passes through a water stop solenoid valve 11 as water supply control means and a water pump 29 fixed to a water pump DC motor 28.
It is connected to a heat exchanger 30 as a heating means. A thermistor 16 for detecting the temperature of the hot water flowing out of the heat exchanger 30 is provided on the downstream side of the heat exchanger 30, and further downstream of the nozzle 1 as a discharge means via a hot water pipe 18.
9 is connected. The hot water pipe 18 is partially branched, and is connected to an air pump 21 driven by an air pump DC motor 20. Further, the controller 31 is electrically connected to the thermistor 16, the water shutoff electromagnetic valve 11, the heater 32 provided in the heat exchanger 30, the water pump DC motor 28, and the air pump DC motor 20. Further, the controller 31 includes a cleaning switch 24 and a stop switch 25.
Signals are exchanged using infrared rays with a remote controller 27 having a variable flow rate switch 26 and the like. Instructions from the user are made by respective input switches provided on the remote controller 27.

Here, the heat exchanger 30 will be described in detail.
FIG. 5 is a perspective view of the heat exchanger 30 and is partially sectioned for explanation. The heat exchanger 30 includes a heating flow path 33 therein, and is provided so that the heater 32 is in contact with the heating flow path 33. The heating channel 33 has a waveform shape having a plurality of bending points for reducing uneven heating of the washing water and improving thermal efficiency, and the heater 32 uses a plate-shaped ceramic heater excellent in heat density. In this embodiment, a ceramic heater is used as the heater, but various applications such as a sheathed heater and a mica heater are conceivable.

In the above configuration, the operation of this embodiment will be described. First, when the user presses the cleaning switch 24 provided on the remote controller 27, the water stop electromagnetic valve 11 is opened, and the cleaning water is supplied from the water supply pipe 10. After the supplied washing water is pressurized by a water pump 29, the heat exchanger 30
Into the heating flow path 33 in the inside. At this time, the controller 31
Controls the number of revolutions of the DC motor 28 for the water pump, and adjusts the amount of washing water to match the input from the variable flow rate switch 26. Further, the cleaning water flowing into the heating flow path 33 is heated by the heater 32 and reaches the thermistor 16. Here, the thermistor 16 detects the temperature of the washing water, and the detected temperature is fed back to the controller 31, so that the controller 31 adjusts the amount of electricity to the heater 32.
As a result, the washing water having the appropriate values for both the flow rate and the temperature reaches the nozzle 19 and is jetted toward the human body part. Simultaneously with the operation of supplying the washing water, the controller 31 applies a pulse voltage to the DC motor 20 for the air pump and drives the same. As a result, air is forcibly mixed into the hot water pipe from the air pump 20.

Here, the pulse voltage applied to the DC motor 20 for the air pump by the controller 31 will be described with reference to FIG. The X-axis in FIG. 6 represents time, and the Y-axis in FIG. 6A represents the number of revolutions of the water pump DC motor 28 in a simplified form of the voltage applied to the air pump motor 20. . As is apparent from this figure, when the flow rate set value of the variable flow rate switch 26 is provided in five stages, the controller 31 controls the rotation speed of the water pump DC motor 28 so as to correspond to each of them. I do. Further, according to the respective settings, that is, according to the rotation speed of the water pump DC motor 28, the air pump DC motor 2
The duty ratio of the pulse voltage applied to 0 is varied. As a result, a predetermined amount of washing water can be obtained even in a low water pressure area or the like. In addition, by automatically changing the amount of air to be mixed in conjunction with the rotation speed of the water pump 29, an optimum washing water is always obtained. The amount of water and the mixing ratio of air can be secured. Further, in the case of washing with the hot water mixed with air, the cleaning speed of the washing water from the nozzle 19 due to the forced mixing of the air is improved, and the action of popping bubbles is compared with the conventional washing with only hot water. As a result, it is possible to perform cleaning with a cleaning water amount of less than half without impairing the cleaning effect and the user's bodily sensation. This has been confirmed in experiments. For this reason, even with an electric energy of up to 1.5 kW (15 A) that can be used in a general household outlet, sufficient boiling capacity can be obtained by the instantaneous heat exchanger 30, so that the conventional hot-water storage type heating method can be used. It is possible to eliminate the heat dissipation loss at the time of storing hot water, which can be realized by means, and to realize a great reduction in power consumption.

(Embodiment 3) Next, a third embodiment of the present invention will be described with reference to FIG. In this case, since the schematic configuration is almost the same as that of the second embodiment, the different points will be mainly described. In the present embodiment, a flow rate sensor 34 is provided as a flow rate detecting means downstream of the water pump 29 and upstream of the heat exchanger 30 so that the amount of washing water supplied from the water pump 29 can be detected. . The controller 35 includes a thermistor 16, a water stop solenoid valve 11, a heater 32 provided in the heat exchanger 30, and a water pump DC motor 2.
8. In addition to DC motor 20 for air pump, flow sensor 3
4 is electrically connected.

In the above configuration, the operation of this embodiment will be described. First, when the user presses the cleaning switch 24 provided on the remote controller 27, the water stop electromagnetic valve 11 is opened, and the cleaning water is supplied from the water supply pipe 10. The supplied washing water is pressurized by a water pump 29 and then supplied to a flow sensor 3.
4 and, after its flow rate is detected, flows into the heating channel 33 in the heat exchanger 30. At this time, the controller 35 applies a pulse voltage having a predetermined duty factor to the water pump DC motor 28 and drives the same. At this time, the controller 35 corrects the duty ratio applied to the water pump DC motor 28 based on the flow rate signal from the flow rate sensor 34,
Adjustment is performed so that the amount of washing water matches the input from the variable flow rate switch 26. By this operation, the amount of washing water supplied by the water pump is always constant without being affected by variations in the water pump, variations in pressure loss in the water circuit, and aging. Further, the cleaning water flowing into the heating flow path 33 is heated by the heater 32 and reaches the thermistor 16. Here, the thermistor 16 detects the temperature of the washing water, and the detected temperature is fed back to the controller 35, so that the controller 35 adjusts the amount of electricity to the heater 32. As a result, the washing water having the appropriate values for both the flow rate and the temperature reaches the nozzle 19 and is jetted toward the human body part. Simultaneously with the operation of supplying the washing water, the controller 35 applies a pulse voltage to the DC motor 20 for the air pump and drives the same. As a result, air is forcibly mixed into the hot water pipe from the air pump 20.

Here, the pulse voltage applied to the DC motor 28 for the water pump and the DC motor 20 for the air pump by the controller 35 will be described with reference to FIG. The X-axis in FIG. 8 represents time, the dotted line on the Y-axis in FIG. 8 represents the set flow rate, and the solid line represents the actual amount of washing water. FIG.
Represents the voltage applied to the water pump DC motor 28 in a simplified form of the voltage applied to the air pump DC motor 20. As is clear from this figure, when a cleaning start signal is input from the cleaning switch 24, the controller 35 applies a pulse voltage to the water pump DC motor 28 and the air pump DC motor, and drives each of them. At the moment of activation, the duty ratio of the applied pulse is assumed to be 100% for a predetermined period. This is a DC motor 28 for the water pump and a DC motor 20 for the air pump.
This is an operation for ensuring the self-start of the motor, and an operation for preventing carbon deposition and the like and improving the reliability of the motor. Further, the controller 35 applies a pulse voltage having a predetermined duty ratio corresponding to the flow rate signal from the flow rate sensor 34 to the DC motor 20 for the air pump. In this way, by varying the duty ratio of the pulse voltage applied to the air pump DC motor 20 based on the flow signal from the flow sensor 34, it is possible to temporarily reduce the performance due to the performance variation of the water pump 29 and the deterioration due to aging. Even if there is a variation in the amount of cleaning water, it is possible to always keep the mixing ratio between the amount of cleaning water and the air that is forcibly mixed in optimal. Further, the controller 35 compares the flow rate signal from the flow rate sensor 34 with the set flow rate value set by the flow rate variable switch 26, and
It goes without saying that if the duty ratio of the pulse voltage applied to the motor is corrected, comfortable cleaning with no variation in the amount of cleaning water can be realized.

[0027]

As is apparent from the above description, the human body cleaning apparatus of the present invention has the following effects.

(1) The air pump forcibly mixes air into the washing water, so that even a small amount of washing water makes it possible to wash a human body with very good bodily sensation and detergency, thereby saving water and power. I can do it. Further, the controller drives the DC motor for the air pump with a pulse voltage, thereby making it possible to increase the variable width of the air entrainment amount, and to optimize the cleaning water amount and the air entrainment amount from a small flow rate to a large flow rate. A high mixing ratio can be obtained.

(2) Forcibly mix air into the washing water,
The water consumption will be greatly reduced, and the use of instantaneous heating means will significantly reduce power consumption. Further, by pulse driving the DC motor for the air pump,
By expanding the variable range of the amount of air mixed in, and by further greatly changing the amount of air mixed into the wash water, the washing strength that cannot be compensated for by the small amount of wash water that can be supplied by the instantaneous heat exchanger And a comfortable cleaning of the human body part that meets the user's preference can be realized.

(3) The controller changes the duty ratio of the pulse voltage applied to the DC motor for the air pump in conjunction with the setting of the amount of washing water by the flow rate setting means, so that the user does not perform a plurality of operations. The ratio between the amount of washing water and the amount of air entrainment is always kept properly, and comfortable washing can be realized.

(4) By controlling the flow rate of the washing water to be supplied by the water pump, the washing flow rate is always obtained as set regardless of the pressure of the washing water supplied to the water supply pipe. By varying the amount of air mixed according to the number, the ratio between the amount of cleaning water and the amount of air mixed can always be kept optimal.

(5) By controlling the amount of air mixed in accordance with the flow rate detected by the flow rate detecting means, the fluctuation of the cleaning water amount caused by the pressure change of the cleaning water supplied to the water supply pipe and the fluctuation of the performance of the water pump. Therefore, the ratio between the amount of washing water and the amount of air entrainment can always be kept optimal.

(6) The duty ratio of the pulse voltage applied to the DC motor for the air pump is set to 1
By keeping it at 00%, even when the duty ratio of the applied pulse voltage is low, the self-starting of the air pump DC motor is ensured, and the deposition of carbon is prevented even when the DC motor is a carbon brush type. As a result, the reliability of the DC motor for the air pump can be improved.

(7) The controller drives the DC motor for the water pump with a pulse voltage, thereby expanding the variable range of the discharge pressure of the water pump, and the flow path of the cleaning water when the ratio between the cleaning water amount and the air mixing amount changes. Pressure loss changes, and the ratio between the amount of washing water and the amount of air entrainment can always be kept optimal.

(8) By correcting the duty ratio of the DC motor for the water pump based on the flow rate detected by the flow rate detection means,
A constant amount of washing water can be obtained without being affected by variations in the water pump, pressure loss in the water circuit, and aging, and the ratio between the amount of washing water and the amount of air entrainment can always be kept optimal.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a human body local cleaning apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram schematically showing a voltage applied to a DC motor for an air pump of the cleaning device.

FIG. 3 is a diagram showing a pipe friction coefficient of a gas-liquid two-layer flow.

FIG. 4 is a schematic configuration diagram of a human body local cleaning apparatus according to a second embodiment of the present invention.

FIG. 5 is a perspective view (partial cross section) showing details of a heat exchanger of the cleaning device.

FIG. 6 is a diagram showing a relationship (schematic) between a rotation speed of a water pump of the cleaning device and a voltage applied to a DC motor for an air pump.

FIG. 7 is a schematic configuration diagram of a human body local cleaning apparatus according to a third embodiment of the present invention.

FIG. 8 is a diagram showing a relationship (schematic) between a set flow rate and a washing water amount of the washing apparatus, and voltages applied to a DC motor for a water pump and a DC motor for an air pump.

FIG. 9 is a schematic configuration diagram of a conventional human body cleaning apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Water supply pipe 11 Water stop solenoid valve (water supply control means) 12 Flow control valve (water supply control means) 13 Hot water tank (heating means) 15 Heater (heating means) 18 Hot water pipe 19 Nozzle (discharge means) 20 DC motor for air pump Reference Signs List 21 air pump 22 controller 27 remote controller (flow rate setting means) 28 DC motor for water pump 29 water pump 30 heat exchanger 31 controller 33 heating flow path 34 flow sensor (flow rate detection means) 35 controller

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Shinoda ▲ Hide ▼ Ho 1006 Kadoma, Kazuma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Keisuke Ono 1006 Kadoma, Kazuma, Kadoma, Osaka Inside the company (72) Inventor Shinichi Maruyama 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd.

Claims (8)

[Claims] A heating means connected to a water supply pipe and a hot water pipe; water supply control means for controlling water supply to the heating means;
A discharge means connected to the hot water pipe for discharging cleaning water to a human body, an air pump for forcibly mixing air into the cleaning water, a brushed air pump DC motor for driving the air pump, and a pulse voltage And a controller for rotating the DC motor for the air pump by applying the controller. 2. The apparatus according to claim 1, wherein the heating means is an instantaneous heat exchanger comprising a heater and a heating channel. 3. The apparatus according to claim 1, further comprising flow rate setting means, wherein the controller varies the duty ratio of the pulse voltage applied to the DC motor for the air pump with the brush in conjunction with the setting of the amount of washing water by the flow rate setting means. A human body local cleaning device as described in the above. 4. The water supply control means is a water pump capable of changing the flow rate of washing water supplied according to the number of rotations, and the controller is a DC for an air pump with a brush in conjunction with the rotation number control of the water pump. 3. The apparatus according to claim 1, wherein the duty ratio of the pulse voltage applied to the motor is varied. 5. A flow rate detecting means for detecting an amount of washing water,
3. The apparatus according to claim 1, wherein the controller varies the duty ratio of the pulse voltage applied to the DC motor for the air pump with a brush in conjunction with the flow rate detected by the flow rate detection means. 6. The human body local cleaning apparatus according to claim 1, wherein the controller sets the duty ratio of the pulse voltage from the start of the DC motor for the air pump with the brush to the elapse of a predetermined time to 100%. . 7. The water supply control means comprises a water pump and a brushed water pump DC motor for driving the water pump, and the controller applies a pulse voltage to control the water pump DC motor. 7. The rotated one of claims 1 to 6.
The human body local cleaning device according to any one of claims 1 to 7. 8. A flow rate detecting means for detecting an amount of washing water,
8. The apparatus according to claim 7, wherein the controller corrects the duty ratio of the pulse voltage applied to the DC motor for the water pump with a brush based on the flow rate detected by the flow rate detection means.