JP2003268842A - Sanitary washing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sanitary washing device capable of maintaining an adequate temperature of washing water at the washing start time. <P>SOLUTION: Pre-operation of washing is performed in response to the instruction by a switch 401 for taking a seat. In the pre-operation of washing, the washing water is heated by a heat exchanger 11, and the pump 13 does not perform a stationary operation, and washing water from the heat exchanger 11 is discharged from a nozzle 1 at the tail. Thereafter, washing operation is carried out in response to the instruction by a remote operation unit 300. In the cleaning operation, the washing water is heated by the heat exchanger and the pump 13 performs a steady state operation and the washing water from the heat exchanger 11 is pressured by the pump 13 and discharged from the nozzle 1 at the tail. <P>COPYRIGHT: (C)2003,JPO

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 equipped with an instantaneous heating device.

[0002]

2. Description of the Related Art In a sanitary washing device for washing a local part of a human body, a heating device for adjusting the washing water used for washing to an appropriate temperature is provided in order to prevent the human body from feeling uncomfortable. Such heating devices are mainly hot water storage type heating devices or instantaneous heating devices.

The hot water storage type heating device is provided with a warm water tank for preliminarily storing a predetermined amount of wash water and heating the wash water to a predetermined temperature by a built-in heater. In this method, the washing water heated to a predetermined temperature is used by using tap water pressure or is pumped by a pump or the like and ejected from a nozzle.

In this hot water storage type heating device, the wash water in the hot water tank must be kept at a predetermined temperature in advance until the human body is washed. Therefore, since it is necessary to constantly supply power to the heater, power consumption increases. In addition, when multiple people continuously wash the local area and use more than the amount of wash water that has been heated to a predetermined temperature in the hot water tank in advance, the temperature of the wash water in the hot water tank drops below the predetermined temperature. Then, it makes the human body uncomfortable.

On the other hand, the instantaneous heating device heats the cleaning water to a predetermined temperature with a heater such as a ceramic heater having an excellent rate of temperature rise and uses tap water pressure when cleaning a local part of the human body. It employs a method in which it is sent under pressure by a pump or the like and ejected from a nozzle.

Therefore, in the instantaneous heating device, it is not necessary to keep the wash water at a predetermined temperature in advance, and it is sufficient to supply electric power to the heater only when it is used, so that power consumption can be suppressed. Also, even when a large amount of cleaning water is used for cleaning the human body locally due to long-term cleaning, continuous use of the toilet, etc., the temperature of the cleaning water may drop below a prescribed temperature and cause discomfort to the human body. Can be prevented.

[0007]

However, in the sanitary washing device using the instantaneous heating device, when the ambient temperature is low such as in winter, the wash water at a lower temperature is supplied from the water supply source to heat it to a predetermined temperature. It requires a lot of power. However, since there is a limit to the power that can be supplied to the heater, etc.,
At the start of use, the unheated washing water was jetted out, which sometimes caused discomfort to the human body.

An object of the present invention is to provide a sanitary washing device which can maintain the temperature of washing water at the start of washing at an appropriate temperature.

[0009]

(First Invention) A sanitary washing device according to the present invention is a sanitary washing device which heats and spouts washing water supplied from a water supply source. Start instructing means for instructing to start, cleaning instructing means for instructing a cleaning operation, a heating device for heating the cleaning water supplied from the water supply source while flowing it, an ejection means for ejecting the cleaning water, and heating In response to the instruction from the start instruction means, the pressurizing means that pressurizes the wash water heated by the device and supplies it to the jetting means, and causes the heating device to heat the wash water and operate the pressurizing means steadily. Without performing the pre-operation of discharging the cleaning water from the heating device from the jetting means without causing the heating device to heat the cleaning water in response to the instruction from the cleaning instructing means, and by causing the pressurizing means to operate steadily. From the heating device The purified water is obtained and a control means for performing cleaning operations for ejecting the pressurized ejection means by pressurizing means.

In the sanitary washing device according to the first aspect of the present invention, the pre-washing operation is performed in response to the instruction from the start instruction means. In the pre-cleaning operation, the heating device heats the cleaning water, and the pressurizing means does not operate normally, and the cleaning water from the heating device is discharged from the ejection means. Then, the cleaning operation is performed in response to the instruction from the cleaning instruction means. In the cleaning operation, the heating device heats the cleaning water, and the pressurizing means operates steadily so that the cleaning water from the heating device is pressurized by the pressurizing means and ejected from the ejecting means.

In this case, even when the temperature of the surrounding environment is low, the low-temperature cleaning water that has stayed is preheated in the previous operation, is discharged without being ejected from the ejection means, and is then heated to a desired temperature in the cleaning operation. The washing water is jetted from the jetting means. Therefore, even when the electric power supplied to the heating device is limited, the unheated cleaning water is not jetted at the start of cleaning, and the temperature of the cleaning water can be maintained at an appropriate temperature. As a result, it is possible to prevent the human body from being uncomfortable.

(Second invention) A sanitary washing device according to a second aspect of the present invention is the structure of the sanitary washing device according to the first invention, wherein the jetting means has a cylinder portion and a piston movably inserted into the cylinder portion. The cylinder part consists of
The piston part has a water supply port for receiving the cleaning water supplied from the heating device, and the piston part has an ejection hole for ejecting the cleaning water and a first flow path for guiding the cleaning water in the cylinder part to the ejection hole. A second flow path is formed between the outer peripheral surface of the cylinder section and the inner peripheral surface of the cylinder section to guide the cleaning water in the cylinder section to the outside of the cylinder section.
The cleaning water discharged from the heating passage is ejected from the ejection hole through the first passage during the cleaning operation.

In this case, in the pre-operation, the cleaning water supplied from the heating device into the cylinder portion is discharged through the second flow passage formed between the outer peripheral surface of the piston portion and the inner peripheral surface of the cylinder portion, During the cleaning operation, cleaning water supplied from the heating device is ejected from the ejection hole through the first flow path of the piston portion. Therefore, during the pre-operation, the low-temperature cleaning water during pre-heating is discharged without hitting the human body, and during the cleaning operation, the cleaning water heated to the desired temperature is ejected onto the human body.

(Third Invention) A sanitary washing device according to a third aspect of the present invention is the sanitary washing device according to the second invention, wherein the second passage has a lower pressure loss than the first passage. Is to have.

In this case, since the second flow path has a lower pressure loss than the first flow path, the wash water flows through the second flow path preferentially over the first flow path. Therefore, in the pre-cleaning operation, the low-temperature cleaning water during preheating can be preferentially discharged through the second flow path rather than the first flow path.

(Fourth invention) In the sanitary washing device according to the fourth invention, in the configuration of the sanitary washing device according to the second or third invention, the pressure of the washing water supplied from the heating device is a predetermined pressure. In the above case, the piston part projects from the cylinder part and the piston part comes into water-tight contact with the cylinder part, so that the second flow path is blocked and the cleaning water is ejected through the first flow path. It is ejected from the hole.

During the pre-operation, since the pressurizing means does not perform the steady operation, the pressure of the washing water supplied to the jetting means is lower than the predetermined pressure. In this case, the wash water is discharged through the second flow path formed between the outer peripheral surface of the piston portion and the inner peripheral surface of the cylinder portion. During the cleaning operation, the pressure means performs a steady operation, so that the pressure of the cleaning water supplied to the ejection means becomes equal to or higher than a predetermined pressure. As a result, the piston portion projects from the cylinder portion, the piston portion comes into water-tight contact with the cylinder portion, and the second flow path is blocked. In this case, the wash water is ejected from the ejection hole through the first flow path. In this way, the flow path of the wash water is switched from the second flow path to the first flow path due to the pressure change of the wash water.

(Fifth Invention) A sanitary washing device according to a fifth invention is the structure of the sanitary washing device according to any one of the first to fourth inventions, wherein the time is transmitted in response to an instruction from the start instruction means. In addition, the control means stops the heating by the heating device based on the time measured by the time measuring means during the pre-operation.

In this case, since the control means can stop the heating of the washing water by the heating device based on the time measured by the time measuring means, the washing water heated by the heating device at the time of the previous operation has a high temperature. Can be prevented. As a result, it is possible to prevent the high-temperature cleaning water from being jetted from the jetting means at the time of shifting to the washing operation.

(Sixth Invention) A sanitary washing device according to a sixth aspect of the present invention is the configuration of the sanitary washing device according to the fifth aspect, wherein the temperature of washing water supplied to the heating device is detected.
The temperature detecting means is further provided, and the control means calculates the heating time of the wash water by the heating device based on the temperature detected by the first temperature detecting means during the pre-operation, and the calculated heating time and the time measuring means. The heating by the heating device is stopped based on the time measured by.

In this case, in the pre-operation, the heating time of the cleaning water is calculated based on the temperature of the cleaning water supplied to the heating device, and the heating device is calculated based on the calculated heating time and the time measured by the time measuring means. The heating by is stopped. When the temperature of the washing water supplied to the heating device is low, the heating time calculated by the control means is long, and when the temperature of the washing water supplied to the heating device is high, the heating time calculated by the control means is short. Become. As a result, the wash water can be preheated to the optimum temperature during the pre-operation.

(Seventh invention) A sanitary washing device according to a seventh invention is the sanitary washing device according to the sixth invention, further comprising a second temperature detecting means for detecting a temperature in an ambient atmosphere. The control means calculates the heating time of the wash water by the heating device based on the temperature detected by the first temperature detection means and the temperature detected by the second temperature detection means during the pre-operation, and is calculated. The heating by the heating device is stopped based on the heating time and the time measured by the time measuring means.

In this case, in the pre-operation, the heating time of the cleaning water by the heating device is calculated based on the temperature of the cleaning water supplied to the heating device and the temperature of the surrounding atmosphere, and the calculated heating time and the time measuring means. The heating by the heating device is stopped based on the time measured by.

In this case, the heating time is calculated by giving priority to the temperature of the washing water, and the length of the heating time is further subdivided according to the temperature in the surrounding atmosphere. Thereby, the washing water can be preheated to the optimum temperature during the pre-operation according to the temperature in the surrounding atmosphere.

When the temperature of the washing water supplied to the heating device is low and the temperature of the surrounding atmosphere is low, the heating time calculated by the control means becomes the longest. Further, when the temperature of the cleaning water supplied to the heating device is low and the temperature of the surrounding atmosphere is high, the heating time calculated by the control means becomes long.

Further, when the temperature of the washing water supplied to the heating device is high and the temperature of the surrounding atmosphere is low,
The heating time calculated by the control means is shortened. Also,
When the temperature of the washing water supplied to the heating device is high and the temperature of the surrounding atmosphere is high, the heating time calculated by the control means becomes shortest.

(Eighth Invention) A sanitary washing device according to an eighth invention is the sanitary washing device according to any one of the first to fourth inventions, wherein the temperature of the washing water heated by the heating device is controlled. A third temperature detecting means for detecting is further provided, and the control means stops the heating by the heating device based on the temperature detected by the third temperature detecting means during the pre-operation.

In this case, since the temperature of the washing water heated by the heating device can be detected by the third temperature detecting means, the control means optimally controls the temperature of the washing water heated in the previous operation. be able to. As a result, it is possible to prevent the high-temperature cleaning water from being jetted from the jetting means at the time of shifting to the washing operation.

(Ninth Invention) A sanitary washing device according to a ninth invention is the sanitary washing device according to any one of the first to eighth inventions, wherein washing water from a water supply source is supplied to a heating device. The control means further starts the supply of the wash water to the heating device by the wash water supply means in response to the instruction from the start instruction means, and then starts the heating of the wash water by the heating device. It is what makes me.

In this case, the control means can start the heating of the cleaning water by the heating device after the cleaning water supply means starts the supply of the cleaning water to the heating device in response to the instruction from the start instructing means. Therefore, it is possible to prevent the heating device from being heated. Therefore, it is possible to prevent the washing water from being heated to a high temperature by heating the heating device empty, and to prevent damage to equipment and fire.

(Tenth Invention) A sanitary washing device according to a tenth aspect of the present invention is the sanitary washing device according to any one of the first to ninth aspects, wherein the heating water is supplied to the heating device by the washing water supply means. The control means further starts heating of the washing water by the heating device in response to the fact that the supply of washing water is detected by the water passage detecting means. is there.

In this case, the control means can start the heating of the wash water by the heating device in response to the detection of the supply of wash water by the water flow detecting means, so that the sanitary washing device fails to wash. When water does not flow to the heating device, it is possible to reliably prevent the heating device from being heated. As a result, it is possible to reliably prevent the washing water from being heated to a high temperature by heating the heating device, and it is possible to prevent equipment damage and fire.

(Eleventh Invention) A sanitary washing device according to an eleventh invention is the structure of the sanitary washing device according to any one of the first to tenth inventions, wherein the temperature of the washing water heated by a heating device is controlled. The control means is further provided with a fourth temperature detecting means for detecting, and the control means causes the pressurizing means to steadily operate based on the temperature detected by the fourth temperature detecting means during the cleaning operation.

In this case, in the control means, during the cleaning operation, the pressurizing means operates steadily based on the temperature of the cleaning water heated by the heating device. Therefore, it is possible to eject the cleaning water at the optimum temperature from the ejection means.

(Twelfth Invention) A sanitary washing device according to a twelfth invention is the configuration of the sanitary washing device according to the eleventh invention, further comprising temperature setting means for setting a temperature during a washing operation, and a control means. In the cleaning operation, when the temperature detected by the fourth temperature detecting means reaches a temperature lower by a predetermined value than the temperature set by the temperature setting means, the pressurizing means is operated in a steady state.

In this case, when the temperature of the cleaning water heated by the heating device reaches a temperature lower by a predetermined value than the temperature set by the temperature setting means during the cleaning operation, the pressurizing means operates steadily. That is, the pressurizing means can be steadily operated at a temperature lower than the set temperature by a predetermined value to eject the cleaning water. Therefore, it is possible to shorten the time from the instruction by the washing instruction means to the ejection of the washing water.

(Thirteenth Invention) A sanitary washing device according to a thirteenth invention is the structure of the sanitary washing device according to the eleventh invention, further comprising temperature setting means for setting a temperature during a washing operation, and a control means. In the cleaning operation, when the temperature detected by the fourth temperature detecting means reaches a temperature higher by a predetermined value than the temperature set by the temperature setting means, the pressurizing means is made to operate normally.

In this case, when the temperature of the cleaning water heated by the heating device reaches a temperature higher by a predetermined value than the temperature set by the temperature setting means during the cleaning operation, the pressurizing means operates steadily. That is, it is possible to cause the pressurizing means to steadily operate and spout the cleaning water at a temperature higher by a predetermined value than the temperature set in consideration of the temperature decrease in each flow path of the sanitary washing device. Therefore, even if the ambient temperature is low, the wash water at a comfortable temperature can be reliably ejected.

(Fourteenth Invention) In the sanitary washing device according to the fourteenth invention, in the constitution of the sanitary washing device according to any one of the first to thirteenth inventions, the start instruction means is a start of use of the sanitary washing device. Is included, and the use start detecting means for giving an instruction for starting the pre-operation to the control means is included.

In this case, when the use start detecting means detects the use start of the sanitary washing device, the control means is instructed to start the pre-operation. Thereby, the pre-operation can be started.

[0041]

DETAILED DESCRIPTION OF THE INVENTION A sanitary washing device according to an embodiment of the present invention will be described below.

FIG. 1 is a perspective view showing a state in which a sanitary washing device according to an embodiment of the present invention is mounted on a toilet bowl.

As shown in FIG. 1, the sanitary washing device 100 is mounted on the toilet bowl 600. The tank 700 is connected to a water pipe and supplies flush water into the toilet 600.

The sanitary washing device 100 comprises a main body 200, a remote control device 300, a toilet seat 400 and a lid 500.

A toilet seat 400 and a lid 500 are attached to the main body 200 so as to be openable and closable via a hinge 501, and a seat switch 401 is attached to the lower surface of the toilet seat 400. Further, the main body 200 is provided with a cleaning water supply mechanism including the nozzle unit 30 and a control unit. The control unit of the main body unit 200 controls the wash water supply mechanism based on a signal transmitted from the remote control device 300 as described later. Further, the main body 20
The control unit of 0 receives a signal from the toilet seat switch 401 attached to the lower surface of the toilet seat 400, a heater built in the toilet seat 400, a deodorizing device (not shown) provided in the main body 200, and warm air. The supply device (not shown) is controlled.

FIG. 2 is a schematic diagram showing an example of the remote control device 300 of FIG. As shown in FIG. 2, the remote control device 3
00 is a plurality of LEDs (light emitting diodes) 301, a plurality of adjustment switches 302, a posterior switch 303, a stimulation switch 304, a stop switch 305, a bidet switch 30.
6. A drying switch 307 and a deodorizing switch 308 are provided.

Adjustment switch 302, posterior switch 303, stimulation switch 304, stop switch 3 depending on the user.
05, bidet switch 306, drying switch 307 and deodorizing switch 308 are pressed. Thereby, the remote control device 300 wirelessly transmits a predetermined signal to the control unit provided in the main body unit 200 of the sanitary washing device 100 described later. The control unit of the main body unit 200 receives a predetermined signal wirelessly transmitted from the remote control device 300, and controls the wash water supply mechanism and the like.

For example, the user may change the bottom switch 303.
Alternatively, when the bidet switch 306 is pushed down, the nozzle portion 30 of the main body portion 200 in FIG. 1 is moved and the cleaning water is ejected. By depressing the stimulus switch 304, the wash water that stimulates the local area of the human body is jetted from the nozzle portion 30 of the main body 200 of FIG. By depressing the stop switch 305, the jet of cleaning water from the nozzle unit 30 is stopped.

By pressing the drying switch 307, warm air is ejected from the warm air supply device (not shown) of the sanitary washing device 100 to the local part of the human body. By pressing the deodorizing switch 308, the sanitary washing device 1
The deodorizing device (not shown) of No. 00 deodorizes the surrounding area.

The adjusting switch 302 includes water pressure adjusting switches 302a and 302b and temperature adjusting switches 302c and 30.
2d and nozzle position adjustment switches 302e and 302f
including.

The user operates the nozzle position adjustment switch 302.
By pressing e, 302f, the position of the nozzle part 30 of the main body part 200 of the sanitary washing device 100 of FIG. 1 is changed, and by pressing the temperature adjustment switches 302c, 302d, it is ejected from the nozzle part 30. The temperature of the wash water changes. In addition, the water pressure adjustment switches 302a, 30
By depressing 2b, the amount of cleaning water ejected from the nozzle portion 30, the pressure, the ejection form, and the like are changed. In the present embodiment, the temperature adjustment switches 302c, 3c
By pressing 02d, the temperature of the washing water becomes 32
It is adjusted between 40 and 40 degrees. For example, when the temperature adjustment switches 302c and 302d are pressed and the temperature adjustment of the wash water is set to 32 degrees, one LED 301 lights up, and when the temperature adjustment of the wash water is set to 34 degrees, LE
When two D301 lights and the temperature adjustment of washing water is set to 36 degrees, three LEDs 301 are turned on, and when the temperature adjustment of washing water is set to 38 degrees, four LEDs 301 are turned on and washing is performed. If the water temperature adjustment is set to 40 degrees,
Five LEDs 301 are lit.

The main body 200 of the sanitary washing device 100 according to the embodiment of the present invention will be described below. Figure 3
FIG. 3 is a schematic diagram showing a configuration of a main body 200 of the sanitary washing device 100 according to the embodiment of the present invention.

The main body 200 shown in FIG. 3 includes a control unit 4, a branch faucet 5, a strainer 6, a check valve 7, a constant flow valve 8, a water shutoff solenoid valve 9, a flow sensor 10, a heat exchanger 11, and a temperature. Sensors 12a, 12b, room temperature sensor 12c, water flow sensor 12
d, the pump 13, the switching valve 14, and the nozzle unit 30 are included. The nozzle unit 30 also includes a posterior nozzle 1, a bidet nozzle 2, and a nozzle cleaning nozzle 3.

As shown in FIG. 3, a branch faucet 5 is inserted in the water pipe 201. In addition, the branch faucet 5 and the heat exchanger 11
A strainer 6, a check valve 7, a constant flow valve 8, a water shutoff solenoid valve 9, a flow rate sensor 10 and a temperature sensor 12a are sequentially inserted in a pipe 202 connected between and. Further, a pipe 203 connected between the heat exchanger 11 and the switching valve 14
The temperature sensor 12b, the water flow sensor 12d, and the pump 13 are inserted in. Further, the room temperature sensor 12c is provided at a position where the temperature around the main body 200 of the sanitary washing device 100 can be measured.

First, the purified water flowing through the water pipe 201 is supplied to the strainer 6 by the branch faucet 5 as cleaning water. The strainer 6 removes dust, impurities and the like contained in the cleaning water. Next, the check valve 7 prevents the backflow of washing water in the pipe 202. And the constant flow valve 8
Thus, the flow rate of cleaning water flowing through the pipe 202 is maintained constant.

A relief pipe 204 is connected between the pump 13 and the switching valve 14, and a relief water pipe 2 is provided at a branch point A between the water shutoff solenoid valve 9 and the flow sensor 10.
05 is connected. A relief valve 206 is inserted in the relief pipe 204. The relief valve 206 is
It opens when the pressure in the pipe 203, especially on the downstream side of the pump 13, exceeds a predetermined value, and prevents problems such as equipment damage and hose disconnection when the water pressure is abnormal. On the other hand, of the wash water whose flow rate is adjusted by the constant flow valve 8 and supplied, wash water that is not sucked by the pump 13 is released and discharged from the water pipe 205. As a result, the pump 13 is not affected by the water supply pressure.
A predetermined back pressure will act on this.

The constant flow valve 8 is usually a unit time for raising the water temperature of the wash water close to 0 ° C. to the water temperature (40 ° C.) suitable for washing the human body by the outlet capacity (15 A) of a general household. The flow rate of the washing water flowing through the pipe is adjusted to the per-flow rate (0.5 L / min).

Next, the flow rate sensor 10 measures the flow rate of the washing water flowing through the pipe 202 and gives the control section 4 a flow rate measurement value. Further, the temperature sensor 12 a measures the temperature of the cleaning water flowing in the pipe 202 and gives the temperature measurement value to the control unit 4.

Subsequently, the heat exchanger 11 heats the cleaning water supplied through the pipe 202 to a predetermined temperature based on the control signal given by the control unit 4. Temperature sensor 12
b measures the temperature of the washing water heated to a predetermined temperature by the heat exchanger 11 and gives the temperature measurement value to the control unit 4. The water flow sensor 12d gives the control unit 4 a water flow signal indicating that cleaning water is flowing through the pipe 203.

The pump 13 pressure-feeds the cleaning water heated by the heat exchanger 11 to the switching valve 14 based on the control signal given by the control unit 4. The switching valve 14 is based on a control signal given by the control unit 4, and the bottom nozzle 1, the bidet nozzle 2, and the nozzle cleaning nozzle 3 of the nozzle unit 30.
The washing water is supplied to any one of the above. Thereby, the posterior nozzle 1, the bidet nozzle 2, and the nozzle cleaning nozzle 3
Cleaning water is jetted from any one of the above.

The room temperature sensor 12c is the sanitary washing device 100.
The temperature around the main body 200 is measured, and the measured temperature value is given to the controller 4.

The control unit 4 gives a signal wirelessly transmitted from the remote control device 300 of FIG. 1, a signal from the seating switch 401, a flow rate measurement value given from the flow rate sensor 10, a temperature sensor 12a, 12b and a room temperature sensor 12c. A control signal is given to the water shutoff solenoid valve 9, the heat exchanger 11, the pump 13 and the switching valve 14 based on the measured temperature value and the water flow signal given from the water flow sensor 12d.

Further, the control unit 4 sanitizes based on the flow rate measurement value given from the flow rate sensor 10, the temperature measurement value given from the temperature sensors 12a and 12b and the room temperature sensor 12c, and the water flow signal given from the water flow sensor 12d. When the failure or abnormality of the cleaning device is determined, an emergency stop signal is given to the water shutoff solenoid valve 9, the heat exchanger 11, the pump 13 and the switching valve 14. For example, the control unit 4 uses the water flow sensor 12
The water flow signal is given from d and the temperature measurement value of the wash water is given from the temperature sensor 12a.
If the flow rate measurement value of 0 is 0, it is determined that the flow rate sensor 10 is out of order, and an emergency stop signal is transmitted to the water shutoff solenoid valve 9, the heat exchanger 11, and the pump 13.

FIG. 4 is a partially cutaway sectional view showing an example of the structure of the heat exchanger 11. As shown in FIG. 4, a bent meandering pipe 510 is embedded in the resin case 504. A flat plate-shaped ceramic heater 505 is provided so as to contact the meandering pipe 510. As shown by the arrow Y, the cleaning water is supplied from the water supply port 511 into the meandering pipe 510, is efficiently heated by the ceramic heater 505 while flowing through the meandering pipe 510, and is discharged from the discharge port 512.

The control unit 4 shown in FIG. 3 includes the temperature sensors 12a and 1a.
The temperature of the ceramic heater 505 of the heat exchanger 11 is feedback-controlled based on the temperature measurement values given by 2b and the room temperature sensor 12c.

In the present embodiment, the control unit 4 controls the temperature of the ceramic heater 505 of the heat exchanger 11 by feedback control, but the present invention is not limited to this, and the ceramic heater 5 is controlled by feedforward control.
The temperature of 05 may be controlled, or when the temperature rises, the ceramic heater 5 is controlled by feedforward control.
It is also possible to perform composite control of controlling the ceramic heater 505 by feedback control in a steady state.

FIG. 5 is a sectional view showing an example of the structure of the pump 13. The pump of FIG. 5 is a double-acting reciprocating pump.

In FIG. 5, a cylindrical space 139 is formed in the main body 138. A pumping piston 136 is provided in the cylindrical space 139. An X-shaped packing 136a is attached to the outer peripheral portion of the pressure-feeding piston 136. The cylindrical space 139 is divided into a pump chamber 139a and a pump chamber 139b by the pressure-feeding piston 136.

A wash water inlet PI is provided on one side of the main body 138.
Is provided, and the wash water outlet PO is provided on the other side. The heat exchanger 11 is connected to the wash water inlet PI via the pipe 203 in FIG. 3, and the switching valve 14 is connected to the wash water outlet PO via the pipe 203.

The wash water inlet PI has an internal flow path P1 and a small chamber S.
1 and the small chamber S3 to communicate with the pump chamber 139a, and the internal passage P2, the small chamber S2 and the small chamber S4 to communicate with the pump chamber 139b.

The pump chamber 139a includes small chambers S5 and S7.
And communicates with the wash water outlet PO via the internal flow path P3. The pump chamber 139b communicates with the wash water outlet PO via the small chamber S6, the small chamber S8, and the internal flow path P4.

An umbrella packing 137 is provided in each of the small chamber S3, the small chamber S4, the small chamber S7 and the small chamber S8.

A gear 131 is attached to the rotating shaft of the motor 130, and a gear 132 meshes with the gear 131. Further, one end of a crankshaft 133 is rotatably attached to the gear 132 with one-point support, and a pumping piston 136 is attached to the other end of the crankshaft 133 via a piston holding portion 134 and a piston holding rod 135. ing.

When the rotation shaft of the motor 130 rotates based on the control signal given by the control unit 4 of FIG. 3, the gear 131 attached to the rotation shaft of the motor 130 is moved by the arrow R1.
, And the gear 132 rotates in the direction of arrow R2. As a result, the pressure-feeding piston 136 moves up and down in the direction of arrow Z in the figure.

FIG. 6 is a schematic diagram for explaining the operation of the umbrella packing 137. For example, when the pumping piston 136 shown in FIG. 5 moves downward to increase the volume of the pump chamber 139a, the pump chamber 1 is more pressurized than the small chamber S1.
Since the pressure in 39a becomes low, the umbrella packing 137 provided in the small chamber S3 is deformed as shown in FIG. 6 (b). As a result, the wash water supplied from the wash water inlet PI flows into the pump chamber 139a via the internal flow path P1, the small chamber S1 and the small chamber S3. In this case, the pressure in the pump chamber 139a becomes lower than the pressure in the small chamber S7,
The umbrella packing 137 provided in the small chamber S7 remains undeformed in the state shown in FIG. 6 (a). Therefore, the wash water does not flow into the pump chamber 139a and, conversely, is not discharged from the wash water outlet PO.

On the other hand, when the pumping piston 136 shown in FIG. 5 moves upward to reduce the volume of the pump chamber 139a, the pressure in the pump chamber 139a becomes higher than the pressure in the small chamber S1. The umbrella packing 137 provided is not deformed as it is in the state shown in FIG.
As a result, the wash water in the small chamber S1 does not flow into the pump chamber 139a. In this case, the umbrella packing 137 provided in the small chamber S7 is deformed as shown in FIG. 6 (b). Therefore, the cleaning water in the pump chamber 139a is
5, the washing water outlet P through the small chamber S7 and the internal flow path P3
It is discharged from O.

The umbrella packing 137 provided in the small chamber S4 is deformed as shown in FIG. 6 (b) when the pressure feeding piston 136 moves upward, and the pressure feeding piston 136 moves downward. In this case, the state shown in FIG. 6A remains unchanged. On the other hand, the umbrella packing 137 provided in the small chamber S8 does not deform in the state shown in FIG. 6A when the pressure-feeding piston 136 moves upward, and when the pressure-feeding piston 136 moves downward. , As shown in FIG. 6 (b). Thereby, when the wash water in the pump chamber 139a is discharged from the wash water outlet PO, the wash water from the wash water inlet PI flows into the pump chamber 139b and the wash water inlet P enters the pump chamber 139a.
When the wash water from I flows in, the wash water in the pump chamber 139b is discharged from the wash water outlet PO.

FIG. 7 is a diagram showing changes in pressure in each part of the pump 13 shown in FIG. The vertical axis of FIG. 7 represents pressure and the horizontal axis represents time.

As shown in FIG. 7, cleaning water having a pressure Pi is supplied to the cleaning water inlet PI of the pump 13. In this case, the pressure Pa of the wash water in the pump chamber 139a changes as shown by the dotted line by the vertical movement of the pressure-feeding piston 136 in FIG. On the other hand, the pressure Pb of the wash water in the pump chamber 139b changes as shown by the broken line. The pressure Pout of the wash water discharged from the wash water outlet PO of the pump 13 periodically changes up and down around the pressure Pc as indicated by the thick solid line.

As described above, in the pump 13, as the pressure-feeding piston 136 moves up and down, pressure is alternately applied to the cleaning water in the pump chamber 139a or 139b, and the cleaning water inlet PI is cleaned. Water is pressurized and discharged from the wash water outlet PO. Below, pump 13
, The pressure-feeding piston 136 moves up and down to generate pressure Pc.
Discharging the cleaning water is called a steady operation.

8A is a vertical sectional view of the switching valve 14, FIG. 8B is a sectional view taken along the line AA of the switching valve 14 of FIG. 8A, and FIG. B of the switching valve 14 in FIG.
It is a -B line sectional view.

The switching valve 14 shown in FIG. 8 includes a motor 141,
It is composed of an inner cylinder 142 and an outer cylinder 143.

The inner cylinder 142 is inserted into the outer cylinder 143, and the rotation shaft of the motor 141 is attached to the inner cylinder 142. The motor 141 performs a rotation operation based on a control signal given by the control unit 4. The inner cylinder 142 rotates as the motor 141 rotates.

As shown in FIGS. 8 (a), 8 (b) and 8 (c), a wash water inlet 143a is provided at one end of the outer cylinder 143, and wash water outlets 143b, 14 are provided at opposite side positions.
3c is provided, and side wash water outlets 143b and 143c are provided.
The wash water outlet 143d is provided at a position different from the above.
Holes 142e and 142f are provided at different positions of the inner cylinder 142.
Is provided. Around the hole 142e, as shown in FIG.
As shown in, the chamfered portion is formed. Inner cylinder 142
Of the cleaning water outlet 1 of the outer cylinder 143 by the rotation of
43b or 143c can be opposed to the hole 14
2f can be opposed to the wash water outlet 143d of the outer cylinder 143.

The cleaning water inlet 143a has a pipe 20 of FIG.
3 is connected, the washing water outlet 143b is connected to the posterior nozzle 1, and the washing water outlet 143c is connected to the bidet nozzle 2
Is connected to the cleaning water outlet 143d.

FIG. 9 is a sectional view showing the operation of the switching valve 14 of FIG. As shown in FIG. 9A, when the motor 141 does not rotate and the hole 142 e of the inner cylinder 142 is on the same side as the wash water outlet 143 d of the outer cylinder 143, the hole 14 of the inner cylinder 142 is
2e does not face any of the wash water outlets 143b and 143c of the outer cylinder 143, and the hole 142f of the inner cylinder 142 does not face the wash water outlet 143d of the outer cylinder 143. Therefore, the wash water is washed water outlets 143b, 143c, 143d.
Does not leak from any of the.

Next, as shown in FIG. 9B, the motor 1
When 41 rotates the inner cylinder 142 by 45 degrees, the inner cylinder 1
A part of the chamfered portion around the hole 142e of 42 is the outer cylinder 143.
Of the cleaning water outlet 143b. Therefore, a small amount of washing water passes through the inside of the inner cylinder 142 from the washing water inlet 143a and flows out from the washing water outlet 143b as shown by an arrow W1.

As shown in FIG. 9C, the motor 1
When 41 rotates the inner cylinder 142 by 90 degrees, the inner cylinder 1
The hole 142e of 42 faces the wash water outlet 143b of the outer cylinder 143. Therefore, a large amount of cleaning water is supplied to the cleaning water inlet 14
3a passes through the inside of the inner cylinder 142 and flows out from the wash water outlet 143b as shown by an arrow W2.

Further, the motor 141 moves the inner cylinder 142 to 27
When rotated 0 degrees, the hole 142e of the inner cylinder 142 faces the wash water outlet 143c of the outer cylinder 143. Therefore, a large amount of cleaning water flows from the cleaning water inlet 143a into the inner cylinder 142.
To flow out from the wash water outlet 143c.

Further, the motor 141 moves the inner cylinder 142 to 180
When rotated once, the hole 142f of the inner cylinder 142 faces the wash water outlet 143d of the outer cylinder 143. Therefore,
A large amount of wash water passes through the inside of the inner cylinder 142 from the wash water inlet 143a and flows out from the wash water outlet 143d.

As described above, when the motor 141 is rotated based on the control signal from the control unit 4, one of the holes 142e and 142f of the inner cylinder 142 becomes one of the wash water outlets 143b to 143d of the outer cylinder 143. The washing water flows out, and both of the holes 142e and 142f of the inner cylinder 142 are flush water outlets 143b to 143d of the outer cylinder 143.
If it does not face any of the above, the wash water does not flow out.

Next, the posterior nozzle 1 of the nozzle portion 30 shown in FIG. 3 will be described. FIG. 10 is a cross-sectional view of the posterior nozzle 1 of the nozzle portion 30 of FIG. In addition, the nozzle unit 3 of FIG.
The configuration and operation of the bidet nozzle 2 of No. 0 are the same as those of the posterior nozzle 1 of FIG.

As shown in FIG. 10, the posterior nozzle 1 is
It is composed of a cylindrical piston portion 20, a cylindrical cylinder portion 21, a seal packing 22, and a spring 23.

A jet hole 25 for jetting cleaning water is formed near the tip of the piston portion 20. A flange-shaped stopper portion 26 is provided at the rear end of the piston portion 20. Further, the seal packing 22 is attached to the stopper portion 26. A flow path 27 is formed inside the piston portion 20 so as to communicate with the ejection hole 25 from the rear end surface.

On the other hand, the cylinder portion 21 comprises a small diameter portion on the front end side and a large diameter portion on the rear end side. As a result, a stopper surface 21b is formed between the small-diameter portion and the large-diameter portion so that the stopper portion 26 can come into contact with the seal packing 22. At the rear end face of the cylinder portion 21, a cleaning water inlet 24
Is provided, and the internal space of the cylinder portion 21 serves as the temperature fluctuation buffer portion 28. The wash water inlet 24 is eccentrically provided at a position different from the central axis of the cylinder portion 21. The wash water inlet 24 is connected to the wash water outlet 143b of the switching valve 14 of FIG.

The piston portion 20 is movably inserted into the cylinder portion 21 such that the stopper portion 26 is located inside the temperature fluctuation buffer portion 28 and the tip portion projects from the opening portion 21a.

Further, the spring 23 has the piston portion 2
It is arranged between the stopper portion 26 of 0 and the peripheral edge of the opening portion 21a of the cylinder portion 21, and biases the piston portion 20 to the rear end side of the cylinder portion 21.

A minute gap BS1 is formed between the outer peripheral surface of the stopper portion 26 of the piston portion 20 and the inner peripheral surface of the cylinder portion 21, and the outer peripheral surface of the piston portion 20 and the inner peripheral surface of the opening portion 21a of the cylinder portion 21 are formed. A minute gap BS2 is formed between the and.

Next, the operation of the posterior nozzle 1 shown in FIG. 10 will be described. FIG. 11 is a sectional view for explaining the operation of the posterior nozzle 1 of FIG.

First, as shown in FIG. 11A, when the washing water is not supplied from the washing water inlet 24 of the cylinder portion 21, the piston portion 20 moves in the direction opposite to the arrow X direction by the elastic force of the spring 23. It retracts and is housed in the cylinder portion 21. As a result, the piston portion 20 is in a state of being most protruded from the opening portion 21a of the cylinder portion 21. At this time, the temperature fluctuation buffering part 28 is not formed in the cylinder part 21.

Next, as shown in FIG. 11B, when the supply of the washing water from the washing water inlet 24 of the cylinder portion 21 is started, the piston portion 20 resists the elastic force of the spring 23 due to the pressure of the washing water. And gradually advances in the direction of arrow X. As a result, the temperature fluctuation buffering portion 2 is provided in the cylinder portion 21.
8 is formed, and the wash water flows into the temperature fluctuation buffer section 28.

Since the cleaning water inlet 24 is provided at a position eccentric with respect to the central axis of the cylinder portion 21, the cleaning water flowing into the temperature fluctuation buffering portion 28 recirculates in a spiral as shown by the arrow V. .

The washing water of the temperature fluctuation buffering portion 28 passes through the minute gap BS1 between the outer peripheral surface of the stopper portion 26 of the piston portion 20 and the inner peripheral surface of the cylinder portion 21 under the conditions described later, and then the outer periphery of the piston portion 20. It flows out from the minute gap BS2 between the surface and the inner peripheral surface of the opening 21a of the cylinder portion 21.

When the piston portion 20 moves further forward, as shown in FIG.
As shown in FIG. 1 (c), the stopper portion 26 contacts the stopper surface 21b of the cylinder portion 21 in a watertight manner via the seal packing 22. As a result, from the minute gap BS1 between the outer peripheral surface of the stopper portion 26 of the piston portion 20 and the inner peripheral surface of the cylinder portion 21 to the outer peripheral surface of the piston portion 20 and the cylinder portion 2
The flow path reaching the minute gap BS2 between the inner peripheral surface of the first opening 21a is blocked. Therefore, the temperature fluctuation buffer 28
The washing water is ejected from only the ejection hole 25 through the flow passage 27 in the piston portion 20.

FIG. 12 shows the flow rate of the washing water supplied from the branch point A of FIG. 3 to the buttocks 1 of FIG. 10 through the pipe 202 and the washing water discharged from the branch point A through the escape water pipe 205. It is a figure which shows a flow volume.

In FIG. 12, the vertical axis represents the pressure of cleaning water, and the horizontal axis represents the flow rate of cleaning water per unit time. Further, a broken line H1 shows a change in the flow rate of the wash water supplied to the assault nozzle 1 of FIG. 10 through the pipe 202 per unit time, and a solid line H2 shows the change per unit time through the escape water pipe 205. The change in the flow rate of wash water is shown.

In this embodiment, the water pipe 201
The flow rate of wash water supplied per unit time is, for example, 1.5 L / min, and the pressure of wash water is Pi.

As shown in FIG. 12, when the pump 13 does not perform a steady operation, the flow rate of cleaning water discharged from the escape water pipe 205 to the outside is 1.3 L, for example.
/ Min. Therefore, the flow rate of cleaning water supplied into the pipe 202 connected to the heat exchanger 11 per unit time is 0.2 L / min.

On the other hand, when the pump 13 performs a steady operation, the pressure of the cleaning water is increased to the pressure Pc, a negative pressure is applied to the branch point A, and the unit is supplied into the pipe 202 connected to the heat exchanger 11. The flow rate of wash water per hour is 0.5 L /
Increase to min. Therefore, the flow rate of the washing water discharged per unit time from the escape water pipe 205 is, for example, 1.0 L / min.

In this case, the pressure loss due to the minute gap BS1 of the posterior nozzle 1 shown in FIG. 11 is set to 0.2 L / min, and the pressure loss due to the ejection hole 25 is set to be larger than the pressure loss due to the minute gap BS1. Also, the minute gap BS
The pressure loss due to 2 is set smaller than the pressure loss due to the minute gap BS1.

From the above, from the cleaning water inlet 24 to 0.
When the wash water of 2 L / min or less is supplied, the piston portion 20 of the posterior nozzle 1 moves so as to slightly project from the opening portion 21a in the cylinder portion 21, but the pressure loss due to the ejection hole 25 causes a minute gap. Since the pressure loss of BS1 is larger than that of BS1, the cleaning water does not jet from the jet holes 25. Furthermore, the minute gap BS is smaller than the pressure loss caused by the minute gap BS1.
Since the pressure loss due to 2 is small, all the cleaning water flowing through the minute gap BS1 is discharged from the minute gap BS2. Therefore, the pump 13 performs a steady operation to wash the cleaning water with the pressure P.
When the pressure is raised above i, the washing water can be jetted from the jet hole 25 of the piston portion 20.
When 3 does not perform the steady operation, the cleaning water is not ejected from the ejection hole 25 of the piston portion 20, and the cleaning water can be discharged through the minute gap BS1 and the minute gap BS2.

Next, FIG. 13 is a flow chart showing an example of the pre-cleaning operation of the control unit 4 according to the present embodiment.
FIG. 14 is a flowchart showing another example of the pre-cleaning operation of control unit 4 according to the present embodiment.

First, an example of the pre-cleaning operation shown in FIG. 13 will be described. The control unit 4 determines whether or not the seating signal from the seating sensor 401 is received (step S11). This seating signal is transmitted from the seating sensor 401 to the control unit 4 when the user sits down on the toilet seat 400. The control unit 4
When it is determined that the seating signal is received from the seating sensor 401, the pre-cleaning operation is started.

First, in the pre-cleaning operation, the control section 4
The water shutoff solenoid valve 9 is instructed to flow the wash water (step S12).

Next, the control section 4 determines whether or not a water flow signal is received from the water flow sensor 12d provided on the outlet side (downstream side) of the heat exchanger 11 (step S13). The water flow sensor 12d transmits a water flow signal to the control unit 4 only when the inside of the pipe 203 is filled with cleaning water. Accordingly, when the water flow signal is received from the water flow sensor 12d, the control unit 4 determines that the meandering pipe 510 of the heat exchanger 11 connected to the pipe 203 is filled with the wash water.

The control section 4 receives the temperature measurement value of the wash water from the temperature sensor 12a (step S14a). Further, the control unit 4 receives the temperature measurement value of the room temperature from the room temperature sensor 12c (step S14b).

The control unit 4 heats the washing water based on the measured temperature value of the washing water given by the temperature sensor 12a, the measured temperature value of the room temperature given by the room temperature sensor 12c, and the preset target temperature setting value of the washing water. The heating time of the pre-cleaning operation of the exchanger 11 is calculated, and the heat exchanger 11 is turned on (step S1).
5). Thereby, the heat exchanger 11 heats the wash water flowing through the meandering pipe 510.

In this case, during the pre-cleaning operation, the heat exchanger 11
The heating time of the cleaning water by the heat exchanger 11 is calculated based on the temperature of the cleaning water supplied to the air and the temperature of the surrounding atmosphere, and the heating time is calculated based on the calculated heating time and the time measured by the control unit 4. The heating by the exchanger 11 is stopped.

In this case, the heating time is prioritized to calculate the heating time, and the length of the heating time is further subdivided according to the temperature in the surrounding atmosphere. Thereby, the cleaning water can be preheated to the optimum temperature during the pre-cleaning operation according to the temperature in the surrounding atmosphere.

When the temperature of the washing water supplied to the heat exchanger 11 is low and the temperature of the surrounding atmosphere is low, the heating time calculated by the control unit 4 is the longest. Also,
When the temperature of the wash water supplied to the heat exchanger 11 is low and the temperature of the surrounding atmosphere is high, the heating time calculated by the control unit 4 becomes long. For example, if the temperature of the wash water is low and the temperature of the surrounding atmosphere is high,
It is possible that the toilet is heated by a hot air supply device (not shown). In this case, the temperature drop of the wash water heated by the heat exchanger 11 is suppressed, and the cooling sensation is easily felt, so the heating time is extended.

Furthermore, when the temperature of the cleaning water supplied to the heat exchanger 11 is high and the temperature of the surrounding atmosphere is low, the heating time calculated by the control unit 4 becomes short. For example, when the temperature of the washing water is high and the temperature of the surrounding atmosphere is low, it is considered that well water is used or a water pipe is buried deep in the ground. In this case,
Although the temperature of the wash water heated by the heat exchanger 11 may decrease, the heat capacity of the wash water is larger than that of the air in the atmosphere. Therefore, the temperature of the wash water is prioritized to shorten the heating time. Further, when the temperature of the wash water supplied to the heat exchanger 11 is high and the temperature of the surrounding atmosphere is high, the heating time calculated by the control unit 4 is the shortest.

Then, the control section 4 switches the switching valve 14 to the posterior nozzle 1 side (step S16). As a result, the motor 141 of the switching valve 14 rotates, the hole 142e of the inner cylinder 142 faces the cleaning water outlet 143b of the outer cylinder 143, and the cleaning water is supplied to the cleaning water supply port 24 of the posterior nozzle 1.

In this case, since the pump 13 is stopped, the washing water supplied to the posterior nozzle 1 is discharged to the outside of the posterior nozzle 1 through the minute gap BS1 and the minute space BS2 in FIG. No spout from 25.

Then, the control section 4 determines whether or not the calculated heating time for the pre-cleaning operation has elapsed (step S1).
7). When it is determined that the calculated heating time for the pre-cleaning operation has not elapsed, the control unit 4 waits until the heating time for the pre-cleaning operation has elapsed. On the other hand, when it is determined that the calculated heating time of the pre-cleaning operation has elapsed, the control unit 4 turns off the heat exchanger 11 (step S18).

The control unit 4 gives an instruction to stop the flow of the wash water through the water shutoff solenoid valve 9 after a certain time has passed (step S19). In this way, the control unit 4 ends the pre-cleaning operation.

As described above, in the pre-cleaning operation, the cleaning water is circulated from the water shutoff solenoid valve 9, and the controller 4 controls the heating time in accordance with the room temperature sensor 12c, the temperature sensors 12a and 12b and the predetermined target set temperature. calculate. Then, the wash water is preheated by the heat exchanger 11 until the calculated heating time elapses, and the wash water is discharged from the minute gap BS1 of the posterior nozzle 1 so that the posterior nozzle 1 from the water shutoff solenoid valve 9 of the sanitary washing device 100. The low-temperature washing water that has accumulated in the flow path up to the ejection holes is discharged from the posterior nozzle 1. Even when the ambient temperature decreases in winter, the wash water preheated by the heat exchanger 11 is discharged from the posterior nozzle 1 until the heating time elapses. Therefore, the heat exchanger 11 itself, the pipe 203, the switching The valve 14 and the posterior nozzle 1 can be reliably heated. Therefore, it is possible to prevent unheated cleaning water from being jetted to the user at the start of cleaning.

Further, the wash water is heated only when the wash water is supplied to the inside of the heat exchanger 11 based on the water flow signal from the water flow sensor 12d, so that the heat exchanger 11 is prevented from being boiled. can do. Therefore, since high-temperature cleaning water is not generated by passing through the inside of the heat exchanger 11 that has been heated by the air, it is possible to prevent the high-temperature cleaning water from being jetted to the user at the start of cleaning.

Next, another example of the pre-cleaning operation shown in FIG. 14 will be described. The control unit 4 determines whether or not the seating signal from the seating sensor 401 is received (step S21). This seating signal is transmitted from the seating sensor 401 to the control unit 4 when the user sits down on the toilet seat 400. Control unit 4
When it is determined that the seating signal is received from the seating sensor 401, starts the pre-washing operation.

First, in the pre-cleaning operation, the control section 4
The water shutoff solenoid valve 9 is instructed to flow the wash water (step S22).

Next, the control section 4 determines whether or not a water flow signal is received from the water flow sensor 12d provided on the outlet side (downstream side) of the heat exchanger 11 (step S23). The water flow sensor 12d transmits a water flow signal to the control unit 4 only when the inside of the pipe 203 is filled with cleaning water. Thereby, when the water flow signal is received from the water flow sensor 12d, the control unit 4 causes the heat exchanger 11 connected to the pipe 203 to operate.
It is determined that the meandering pipe 510 of is filled with cleaning water.

When it is determined that the water flow signal has been received, the control section 4 turns on the heat exchanger 11 (step S24).
Thereby, the heat exchanger 11 heats the wash water flowing through the meandering pipe 510.

Then, the control section 4 switches the switching valve 14 to the posterior nozzle 1 side (step S25). As a result, the motor 141 of the switching valve 14 rotates, the hole 142e of the inner cylinder 142 faces the cleaning water outlet 143b of the outer cylinder 143, and the cleaning water is supplied to the cleaning water supply port 24 of the posterior nozzle 1.

In this case, since the pump 13 is stopped, the washing water supplied to the posterior nozzle 1 is discharged to the outside of the posterior nozzle 1 through the minute gap BS1 and the minute space BS2 in FIG. No spout from 25.

Then, the control section 4 receives the temperature measurement value of the washing water from the temperature sensor 12b (step S26).
Then, the control unit 4 determines whether or not the temperature measurement value given by the temperature sensor 12b has reached a preset target temperature set value (step S27). Control unit 4
When it is determined that the temperature measurement value given by the temperature sensor 12b does not reach the target set temperature value, the process returns to step S26, and the processes of steps S26 and S27 are repeated until the set target set temperature value is reached. To do.

On the other hand, when it is determined that the temperature measurement value given by the temperature sensor 12b has reached the target set temperature value, the control section 4 turns off the heat exchanger 11 (step S2).
8). The control unit 4 gives an instruction to stop the flow of the wash water in the water shutoff solenoid valve 9 after a certain time has passed (step S29). In this way, the control unit 4 ends the pre-cleaning operation.

As described above, in the pre-cleaning operation, the cleaning water is circulated from the water shutoff solenoid valve 9 and preheated by the heat exchanger 11 until the cleaning water reaches a predetermined target set temperature. By discharging from the gap BS1, the low-temperature cleaning water staying in the flow path from the water shutoff solenoid valve 9 of the sanitary cleaning device 100 to the ejection hole of the posterior nozzle 1 is discharged from the posterior nozzle 1. In addition, even when the ambient temperature decreases in winter, the wash water preheated to the target set temperature by the heat exchanger 11 is used as the posterior nozzle 1
The heat exchanger 11 itself, the pipe 203,
The switching valve 14 and the posterior nozzle 1 can be reliably heated. Therefore, it is possible to prevent unheated cleaning water from being jetted to the user at the start of cleaning.

Further, since the wash water is heated only when the wash water is flowing through the heat exchanger 11 based on the water flow signal from the water flow sensor 12d, the heat exchanger 11 is not heated. Can be prevented. Therefore, since high-temperature cleaning water is not generated by passing through the inside of the heat exchanger 11 that has been heated by air, it is possible to prevent the high-temperature cleaning water from being jetted to the user at the start of cleaning. Damage to equipment and fire are prevented.

That is, when the heat exchanger 11 is in an empty state, an abnormal temperature is detected by the temperature sensor 12b provided in the heat exchanger 11. For example, when the temperature sensor 12b detects an abnormal temperature, the control unit 4 cuts off the power supply to the heat exchanger 11. However, when the power supply to the heat exchanger 11 is not interrupted, the sanitary washing device is mainly composed of resin and the like, so that other parts are burnt or a fire occurs in the worst case.

Further, the heating device is provided with a fusing fuse (not shown) as a safety device. When the temperature of the fusing fuse rises excessively, the internal conductor melts and loses electrical continuity. Therefore, when the fusing fuse blows, the heat exchanger 11 needs to be replaced.

Next, FIG. 15 is a flowchart showing an example of the cleaning operation of the control unit 4 according to this embodiment, and FIG. 16 shows another example of the cleaning operation of the control unit 4 according to this embodiment. It is a flowchart.

Here, the temperature of the wash water is set by the user pressing the wash water temperature adjusting switches 302c and 302d. Hereinafter, the temperature of the washing water set by the user will be referred to as a user set value. In this example, the user setting value is 38 ° C.

First, an example of the cleaning operation shown in FIG. 15 will be described. When the user presses the bottom washing switch 303 of the remote operation unit 300 of FIG. 2, the remote operation unit 30 is pressed.
From 0, a bottom wash switch pressing signal is transmitted to the control unit 4.

As shown in FIG. 15, the control unit 4 determines whether or not a bottom wash switch pressing signal has been received from the remote control unit 300 (step S30). When the control unit 4 receives the posterior wash switch pressing signal, the control unit 4 starts the washing operation.

First, in the cleaning operation, the control section 4 instructs the water shutoff solenoid valve 9 to flow the cleaning water (step S31).

Next, the control section 4 determines whether or not a water flow signal is received from the water flow sensor 12d provided on the outlet side (downstream side) of the heat exchanger 11 (step S32). The water flow sensor 12d transmits a water flow signal to the control unit 4 only when the inside of the pipe 203 is filled with cleaning water. Accordingly, when the water flow signal is received from the water flow sensor 12d, the control unit 4 determines that the meandering pipe 510 of the heat exchanger 11 connected to the pipe 203 is filled with the wash water.

Next, the control section 4 turns on the heat exchanger 11 (step S33). Thereby, the heat exchanger 11
Heats the wash water flowing through the meandering pipe 510.

The controller 4 receives the temperature measurement value of the wash water from the temperature sensor 12b (step S34). Control unit 4
Determines whether or not the temperature measurement value of the cleaning water received from the temperature sensor 12b has reached the first temperature control value (step S35). Here, the first temperature control value means a temperature lower by a predetermined value than the user set value. In this example, the predetermined value is 2 deg. In this case, the first temperature control value is 36
℃.

Here, the first temperature control value in the cleaning operation of the controller 4 in FIG. 15 will be described. For example, under the conditions where the ambient temperature is the lowest in winter (for example, in an atmosphere of 5 ° C.), the temperature of the wash water ejected from the ejection holes 25 of the posterior nozzle 1 is heated by the ceramic heater 501 of the heat exchanger 11. About 2 degrees from the temperature of the washing water immediately after
deg lowers. However, normally, unless the temperature of the washing water ejected from the ejection hole 25 of the posterior nozzle 1 is 32 ° C. or lower, the user does not feel uncomfortable. Therefore, the first temperature control value is set to a temperature (36 ° C.) lower by a predetermined value (2 deg) than the user set value (38 ° C.).

In the control unit 4, the temperature measurement value of the wash water supplied from the temperature sensor 12b is the first temperature control value (36 ° C.).
If it is determined that the value has not reached, the process returns to step S34 and the processes of steps S34 and S35 are repeated. on the other hand,
When it is determined that the temperature measurement value of the wash water given by the temperature sensor 12b has reached the first temperature control value (36 ° C.),
The control unit 4 switches the switching valve 14 to the posterior nozzle 1 side (step S36). As a result, the motor 141 of the switching valve 14 rotates, and the hole 142e of the inner cylinder 142 moves into the outer cylinder 143.
The washing water is supplied to the washing water supply port 24 of the posterior nozzle 1 so as to face the washing water outlet 143 b.

Subsequently, the control section 4 turns on the pump 13 (step S37). The pump 13 is a wash water inlet PI
The washing water in the pipe 203 connected to is pressurized and discharged from the washing water outlet PO. Therefore, a negative pressure is applied to the pipes 202 and 203 on the upstream side of the pump 13 in FIG.
The flow rate of wash water flowing through 2,203 per unit time increases.

In this case, since the flow rate of the washing water flowing through the pipes 202 and 203 exceeds the flow rate of the washing water which can be discharged per unit time by the minute gap BS1 of the posterior nozzle 1, the piston portion 20 of the posterior nozzle 1 is From the state shown in FIG. 11 (b), it gradually advances in the direction of arrow X against the elastic force of the spring 23.

Then, the piston portion 20 further advances,
As shown in FIG. 11C, the stopper portion 26 has the stopper surface 21 b of the cylinder portion 21 via the seal packing 22.
In a watertight manner. As a result, from the minute gap BS1 between the outer peripheral surface of the stopper portion 26 of the piston portion 20 and the inner peripheral surface of the cylinder portion 21, between the outer peripheral surface of the piston portion 20 and the inner peripheral surface of the opening portion 21a of the cylinder portion 21. Minute gap BS2
The flow path leading to is cut off. Therefore, the cleaning water is ejected from only the ejection hole 25 through the flow passage 27 in the piston portion 20 and is transferred to the cleaning state.

As described above, by setting the first temperature control value to a temperature (36 ° C. in this example) lower than the temperature set by the user at a temperature at which the human body does not normally feel uncomfortable. It becomes possible to shift to the washing state in a short time after the buttocks washing switch 303 is pressed.

Further, the wash water is heated only when the wash water is flowing into the heat exchanger 11 based on the water flow signal from the water flow sensor 12d, so that the heat exchanger 11 is not heated. Can be prevented. Therefore, it is possible to prevent the high-temperature cleaning water from being jetted to the user at the start of cleaning, and to prevent the equipment from being damaged or fired.

Next, another example of the cleaning operation shown in FIG. 16 will be described. The cleaning operation of the control unit 4 of FIG. 16 differs from the cleaning operation of the control unit 4 shown in FIG. 15 in the process of step S35a. In step S35a, the control unit 4 determines whether or not the temperature measurement value of the wash water received from the temperature sensor 12b has reached the second temperature control value (step S35).
a). Here, the second temperature control value means a temperature that is higher than the user set value by a predetermined value. In this example, the predetermined value is 2de
g. In this case, the second temperature control value is 40 ° C.

Second in the cleaning operation of the controller 4 in FIG.
The temperature control value will be described. For example, the temperature of the wash water ejected from the ejection hole 25 of the posterior nozzle 1 is the temperature of the ceramic heater 501 of the heat exchanger 11 under the condition where the ambient temperature is the lowest (for example, in an atmosphere of 5 ° C.) in winter.
Is about 2 deg lower than the temperature of the washing water immediately after being heated. Therefore, the second temperature control value is set to the user set value (3
It is set to a temperature (40 ° C.) higher by a predetermined value (2 deg) than 8 ° C. Due to the above, by setting the second temperature control value to a temperature (40 ° C.) higher than the temperature set by the user by a predetermined value, the jetting to the user can be achieved even under the condition that the ambient temperature decreases in winter. It is possible to maintain the wash water to be maintained at the optimum temperature.

Further, the wash water is heated only when the wash water is flowing into the heat exchanger 11 based on the water flow signal from the water flow sensor 12d, so that the heat exchanger 11 is not heated. Can be prevented. Therefore, it is possible to prevent the high-temperature cleaning water from being jetted to the user at the start of cleaning. It should be noted that in the present embodiment, either one of the two examples of the pre-cleaning operation and one of the two examples of the cleaning operation can be selected and combined.

In the above example, the predetermined value is 2d.
The case where the first temperature control value is set to 36 ° C. and the second temperature control value is set to 40 ° C. has been described, but the first temperature control value and the second temperature control value are The value is not limited, and it is preferable to set a temperature range that does not cause discomfort to the human body, for example, 32 ° C to 40 ° C.

In this embodiment, the posterior nozzle 1 is used.
And the bidet nozzle 2 corresponds to the ejection means, and the heat exchanger 11
Corresponds to a heating device, the seating switch 401 corresponds to a start instructing unit and a use start detecting unit, the pump 13 corresponds to a supplying unit, the control unit 4 corresponds to a control unit, and the remote operation device 300 corresponds to a cleaning instructing unit. The cleaning water inlet 24 corresponds to the water supply port, the flow passage 27 corresponds to the first flow passage, and the outer peripheral surface of the stopper portion 26 of the piston portion 20 and the cylinder portion 21.
The minute gap BS1 between the inner peripheral surface and the inner peripheral surface corresponds to the second flow path, the temperature sensor 12a corresponds to the first temperature detecting means,
The room temperature sensor 12c corresponds to the second temperature detecting means, the temperature sensor 12b corresponds to the third and fourth temperature detecting means, the water shutoff solenoid valve 9 corresponds to the wash water supplying means, and the water passage sensor 12d corresponds to. Corresponding to water flow detection means, temperature adjustment switch 3
02c and 302d correspond to the temperature setting means.

Further, in the present embodiment, the seating switch 401 is used as the start instructing means and the use start detecting means.
However, the present invention is not limited to this, and for example, a pressure sensitive switch may be provided on the hinge portion 501 of FIG.
A sensor for detecting the electrostatic capacitance of 00 may be used, and an infrared sensor or an ultrasonic sensor may be used to detect the entry / exit of the user.

Further, the case where the flow rate of the wash water supplied to the heat exchanger 11, the pump 13 and the nozzle portion 30 is adjusted by the escape water pipe 205 and the constant flow valve 8 has been described in the present embodiment. There is no limitation, and a constant pressure valve or the like that maintains a constant pressure may be used.

Further, in the present embodiment, the pump 1
Although the case where the double-action reciprocating pump is used as 3 has been described, the present invention is not limited to this, and a rotary pump or a reciprocating pump may be used.

In this embodiment, the pump 13 is not normally operated by stopping the pump 13 during the pre-cleaning operation, but the cleaning water is not spouted from the ejection holes of the posterior nozzle 1 or the bidet nozzle 2 during the pre-cleaning operation. Alternatively, the pump 13 may be operated. That is, the “steady operation” of the pump 13 means an operation in which the discharge pressure of the pump 13 becomes a pressure at which the wash water is ejected from the ejection holes of the posterior nozzle 1 or the bidet nozzle 2.

[0164]

According to the present invention, even when the temperature of the ambient environment is low, the low-temperature washing water that has accumulated is preheated in the pre-operation and is discharged without being ejected from the ejection means, and then the desired cleaning water is obtained. The washing water heated to the temperature is jetted from the jetting means. Therefore, even when the electric power supplied to the heating device is limited, the unheated cleaning water is not jetted at the start of cleaning, and the temperature of the cleaning water can be maintained at an appropriate temperature. As a result, it is possible to prevent the human body from being uncomfortable.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a sanitary washing device according to an embodiment of the present invention is attached to a toilet bowl.

FIG. 2 is a schematic diagram showing an example of the remote control device of FIG.

FIG. 3 is a schematic diagram showing a configuration of a main body of a sanitary washing device according to an embodiment of the present invention.

FIG. 4 is a partially cutaway sectional view showing an example of the structure of a heat exchanger.

FIG. 5 is a sectional view showing an example of the structure of a pump.

FIG. 6 is a schematic diagram for explaining the operation of the umbrella packing.

FIG. 7 is a diagram showing changes in pressure at various parts of the pump.

8A is a vertical sectional view of the switching valve, FIG. 8B is a sectional view taken along line AA of the switching valve of FIG. 8A, and FIG. 8C is B- of the switching valve of FIG. B line cross section

9 is a sectional view showing the operation of the switching valve of FIG.

10 is a cross-sectional view of the ass nozzle of the nozzle portion of FIG.

11 is a cross-sectional view for explaining the operation of the ass nozzle of FIG.

12 is a diagram showing the flow rate of wash water supplied from the branch point A of FIG. 3 to the assault nozzle of FIG. 10 through a pipe and the flow rate of wash water discharged from the branch point A through a escape water pipe.

FIG. 13 is a flowchart showing an example of a pre-cleaning operation of the control unit according to the present embodiment.

FIG. 14 is a flowchart showing another example of the pre-cleaning operation of the control unit according to the present embodiment.

FIG. 15 is a flowchart showing an example of a cleaning operation of the control unit according to the present embodiment.

FIG. 16 is a flowchart showing another example of the cleaning operation of the control unit according to the present embodiment.

[Explanation of symbols]

1 ass nozzle 2 bidet nozzle 3 nozzle cleaning nozzle 4 control unit 5 branch faucets 6 strainers 7 Check valve 8 constant flow valve 9 Water stop solenoid valve 10 Flow rate sensor 11 heat exchanger 12a, 12b Temperature sensor 12c Room temperature sensor 12d Water flow sensor 13 pumps 14 switching valve 20 Piston part 21 Cylinder part 21a opening 21b Stopper surface 22 Seal packing 23 spring 24 Wash water inlet 25 ejection holes 26 Stopper 27 channels 28 Temperature fluctuation buffer 30 nozzle 100 sanitary washing device 200 main body 201 water pipe 300 Remote control device 302 Adjustment switch 302a, 302b Water pressure adjustment switch 400 toilet seat 401 seat switch 500 lid 501 hinge 600 toilet bowl 700 tanks

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeru Shirai             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 2D038 JA01 JA02 JA05 JB04 JF05                       JH00 JH02 KA12 KA13 KA14

Claims (14)

[Claims] 1. A sanitary washing device for heating and jetting washing water supplied from a water supply source, comprising start instruction means for giving an instruction for starting a pre-washing operation, and a washing instruction for giving a washing operation. Means, a heating device that heats the cleaning water supplied from the water supply source while flowing it, a spraying device that sprays the cleaning water, and a cleaning device that pressurizes the cleaning water heated by the heating device and supplies it to the spraying device. In response to an instruction from the pressure means and the start instruction means, the heating device is caused to heat the washing water, and the washing water from the heating device is discharged from the jetting means without causing the pressurizing means to operate steadily. A pre-discharging operation is performed, and in response to an instruction from the washing instructing means, the heating device is caused to heat the washing water, and the pressurizing means is made to operate steadily so that the washing water from the heating device is discharged. A sanitary washing device comprising: a control unit that performs a washing operation in which pressure is applied by the pressurizing unit to eject from the ejecting unit. 2. The jetting means comprises a cylinder portion and a piston portion movably inserted into the cylinder portion, the cylinder portion having a water supply port for receiving cleaning water supplied from the heating device, The piston portion has an ejection hole for ejecting cleaning water, and a first flow path for guiding the cleaning water in the cylinder portion to the ejection hole. The outer peripheral surface of the piston portion and the inner peripheral surface of the cylinder portion are provided. And a second flow path for guiding the cleaning water in the cylinder part to the outside of the cylinder part are formed, and the cleaning water from the heating device is discharged from the second flow path during the pre-operation. The sanitary washing device according to claim 1, wherein the washing water from the heating device is jetted from the jet hole through the first flow path during the washing operation. 3. The sanitary washing device according to claim 2, wherein the second flow path has a lower pressure loss than the first flow path. 4. The piston portion projects from the cylinder portion and the piston portion comes into watertight contact with the cylinder portion when the pressure of the washing water supplied from the heating device exceeds a predetermined pressure. 4. The sanitary washing device according to claim 2 or 3, wherein the second flow path is blocked, and the wash water is jetted from the jet hole via the first flow path. 5. The control means further comprises a time measuring means for measuring a lapse of time in response to an instruction from the start instructing means, and the control means, based on a time measured by the time measuring means during the pre-operation. The sanitary washing device according to any one of claims 1 to 4, wherein heating by the heating device is stopped. 6. A first temperature detecting means for detecting a temperature of washing water supplied to the heating device is further provided, and the control means is detected by the first temperature detecting means during the pre-operation. The heating time of the washing water by the heating device is calculated based on the temperature, and the heating by the heating device is stopped based on the calculated heating time and the time measured by the time measuring means. The sanitary washing device described. 7. A second temperature detecting means for detecting a temperature in a surrounding atmosphere is further provided, and the control means has a temperature detected by the first temperature detecting means and the second temperature detecting means during the pre-operation. The heating time of the washing water by the heating device is calculated based on the temperature detected by the temperature detection means, and the heating by the heating device is stopped based on the calculated heating time and the time measured by the time measuring means. The sanitary washing device according to claim 6, characterized in that 8. A third temperature detecting means for detecting the temperature of the cleaning water heated by the heating device is further provided, and the control means is detected by the third temperature detecting means during the pre-operation. The sanitary washing device according to any one of claims 1 to 4, wherein heating by the heating device is stopped based on temperature. 9. The cleaning water supply means for supplying the cleaning water from the water supply source to the heating device is further provided, and the control means is responsive to the instruction from the start instructing means for the heating by the cleaning water supply means. The sanitary washing device according to any one of claims 1 to 8, wherein heating of the washing water by the heating device is started after the supply of washing water to the device is started. 10. The water flow detection means for detecting that the cleaning water is being supplied to the heating device by the cleaning water supply means, and the control means is for supplying the cleaning water by the water flow detection means. The sanitary washing device according to any one of claims 1 to 9, wherein heating of the washing water by the heating device is started in response to the detection. 11. A fourth temperature detecting means for detecting the temperature of the cleaning water heated by the heating device is further provided, and the control means is detected by the fourth temperature detecting means during the cleaning operation. The sanitary washing device according to any one of claims 1 to 10, wherein the pressurizing means is steadily operated based on the temperature. 12. The temperature setting means for setting the temperature during the cleaning operation is further provided, and the control means sets the temperature detected by the fourth temperature detecting means by the temperature setting means during the cleaning operation. 2. The pressurizing means is normally operated when the temperature reaches a temperature lower by a predetermined value than the predetermined temperature.
The sanitary washing device according to 1. 13. The temperature setting means for setting the temperature during the cleaning operation is further provided, and the control means sets the temperature detected by the fourth temperature detecting means by the temperature setting means during the cleaning operation. 2. The pressurizing means is operated in a steady state when the temperature reaches a temperature higher by a predetermined value than the predetermined temperature.
The sanitary washing device according to 1. 14. The start instruction means includes use start detection means for detecting the start of use and for giving an instruction for starting the pre-operation to the control means. The sanitary washing device described in.