ES2743150T3 - Sanitary Cleaning Device - Google Patents

Abstract

A sanitary washing apparatus comprising: a washing water supply device (11) that is suitable for supplying washing water at a fluctuating pressure; a device (14) of your air minister that is suitable for supplying air at a fluctuating pressure; and a spray device (540) having a spray port (540c), and is suitable for spraying the water supplied by said wash water supply device (11) and the air supplied by said air device (14) from said spray port (540c) wherein the pressure of the wash water supplied by said wash water supply device (11) and a pressure of the air supplied by said air supply device (14) are set in such a way that the pressure of the air supplied to said spray device (540) is greater than the pressure of the wash water supplied to said spray device at least once in a period in which the wash water is being sprayed from said device ( 540) spraying, characterized in that the pressure of the air supplied to said spraying device (540) is set lower than a maximum value of the pressure of the washing water sumi Supplied to said spray device (540), said air supply device (14) includes an air pressurizing device (14) that is suitable for pressurizing air to a periodically fluctuating pressure, said device (11) The wash water supply includes a wash water pressurization device (11) which is suitable for pressurizing the wash water supplied from a water supply source to a periodically fluctuating pressure, and the pressure of the wash water washing pressurized by said washing water pressurizing device (11) and the pressure of the air pressurized by said air pressurizing device (14) are set in such a way that a maximum value of the pressure of the air supplied to said device (540 ) spray is greater than a minimum value of the pressure of the wash water supplied to said spray device (540).

Description

DESCRIPTION

Sanitary Cleaning Device

Technical field

The present invention relates to a sanitary washing apparatus that washes the private parts of a human body. Sanitary washing devices that wash the private parts of human bodies have been conventionally provided with various washing functions according to the tastes of the users. A description is made of a human body washing apparatus of Patent Document 1 as an example of such sanitary washing apparatus.

In the human body wash apparatus, tap water obtained from a tap tap water pipe is sent to a heat exchanger through a connection pipe, and heated to a given temperature at the washing time of the private parts of a human body. Tap water heated by the heat exchanger is sent to a rear nozzle or a bidet nozzle through a rear hose or a bidet hose as washing water to wash the private parts of the human body.

In this case, air hoses that extend from an air pump are connected to the rear hose and the bidet hose. The air pump is operated with the washing water flowing in the rear hose or in the bidet hose, so that the air is supplied into the rear hose or the bidet hose. This causes the air to be mixed in the wash water flowing in the rear hose or in the bidet hose. The wash water with the mixed air in it is sprayed from the rear nozzle or bidet nozzle to the private parts of the human body.

Said apparatus is known from JP 2002-21155 A, US 6,754,912 B1 shows a water spray technique that extends to a cleaning area in a two-dimensional manner without moving a nozzle. A nozzle head has a water agitation chamber, which is located immediately below a nozzle opening and is connected to the nozzle opening through a small diameter connecting pipe. The water agitation chamber is formed as a hollow space that has a conical inner wall. A head flow path is eccentrically connected to the water agitation chamber. The cleaning water that is flowed through the head flow path into the water stirring chamber is stirred along the conical inner wall of the water stirring chamber and is sprayed from the nozzle opening of a spiral shape (cone-shaped).

A sanitary cleaning apparatus according to EP 0 615 027 A1 comprises a plurality of cleaning water jet openings in a nozzle, and the axes of these jet openings intersect each other between a jet surface of the nozzle thus a region to be cleaned. The sanitary cleaning apparatus provides various cleaning patterns giving turbulence to the jet flow, mixing air in the water, and changing the distribution ratio of the jet flows of different jet openings.

A sanitary device liquid circulation system according to US 4,571,752 includes a water supply portion, an additive supply portion and an air supply portion. The water supply portion includes a water source, a selectively renewable water cell, a delivery passage that extends from the water source to the water cell and a valve that controls the flow of water from the water source. to the water pile. The additive supply portion includes an additive reservoir, a first conduit that extends from the reservoir to the delivery passage and a measuring mechanism disposed along the first conduit. The measuring mechanism includes a chamber, a mobile piston disposed within the chamber with the piston being mobile in response to changes in water flow in the water supply portion. The air supply portion includes an electric motor, a source of electric power for the engine and a control mechanism that intermittently drives the engine. A pulsation mechanism is operatively connected to the motor and a pump includes a mobile diaphragm responsive to the pulsation mechanism. There is an outlet from the pump and a second conduit extends from the outlet in the water stack. The second conduit includes an outlet in the water stack that provides a multiplicity of small separate openings. A predetermined amount of additive is measured in the water cell in response to changes in water flow in the water supply portion and air is intermittently introduced into the water cell in a multiplicity of bubbles to maintain a foam in the water pile.

Disclosure of the invention

Problems to solve by the invention

The anterior human body wash apparatus has a function of adjusting the flow of the washing water flowing in the rear hose and in the bidet hose. This allows the flow of sprayed washing water from the rear hose and the bidet nozzle hose to be adjusted.

However, the pressure of the wash water in the rear hose or the bidet hose increases as the flow of the wash water becomes higher. In that case, an amount of air mixed in the wash water decreases. This makes it difficult to spray the wash water as masses of water from the rear nozzle or the bidet nozzle.

The air needs to be under pressure using a large air pump in order to mix a sufficient amount of air in the wash water. In that case, the cost is high with the increase in the size of the human body wash apparatus.

An object of the present invention is to provide a sanitary washing apparatus that is capable of intermittently spraying washing water as separate bodies of water and that can prevent the increase in size and can be manufactured at a lower cost.

Means to solve the problems

(1) In accordance with the present invention, a sanitary washing apparatus includes a washing water supply device that supplies washing water at a fluctuating pressure, an air supply device that supplies air, and a spraying device which has a spray port, and sprays the wash water supplied by the washing water supply device and the air supplied by the air supply device from the spray port, where the pressure of the washing water supplied by The washing water supply device and an air pressure supplied by the air supply device are set such that the pressure of the air supplied by the spraying device is greater than the pressure of the washing water supplied by the device spray at least once in a period in which the wash water is sprayed from the spray device ion.

In the sanitary washing apparatus according to the present invention, the washing water is supplied to the spraying device by means of the washing water supply device at the fluctuating pressure, the air is supplied to the spraying device by the spraying device. Air supply and the washing water supplied and the air are sprayed from the spray port. In this case, the pressure of the air supplied to the spraying device is higher than the pressure of the washing water supplied to the spraying device at least once in the period in which the washing water is sprayed from the spraying device.

The air is mixed in the wash water when the pressure of the air supplied to the spray device is greater than the pressure of the wash water supplied to the spray device. This causes the washing water sprayed from the spray port to be sprayed intermittently as bodies of water. Since the pressure of the wash water fluctuates, a time point at which the pressure of the wash water is lower than the air pressure can be easily generated without increasing the air pressure even when the flow of the wash water is high . Therefore, the air supply device does not need to be enlarged. As a result, the sanitary washing apparatus can be prevented from increasing in size and can be manufactured at a lower cost.

Additionally, the pressure of the air supplied to the spray device is set lower than a maximum value of the pressure of the wash water supplied to the spray device.

Therefore, the air pressure supplied to the spraying device does not need to be increased. Therefore, the air supply device does not need to be enlarged. As a result, the sanitary washing apparatus can be prevented from increasing in size and can be manufactured at a lower cost.

Additionally, the air supply device supplies the air at a fluctuating pressure. In this case, the air supplied to the spray device may be mixed irregularly in the wash water supplied to the spray device. This causes the wash water and air to be sprayed irregularly from the spray device in an alternate manner. Using this wash water offers a more stimulating washing sensation to the users.

The air supply device includes an air pressurization device that pressurizes the air at a periodically fluctuating pressure, the washing water supply device may include a washing water pressurization device that pressurizes the washing water supplied from a water supply source at a periodically fluctuating pressure, and the pressure of the water pressurized by the washing water pressurization device and the pressure of the pressurized air by the pressurization device can be set such that a maximum value of The pressure of the air supplied to the spray device is greater than a maximum value of the pressure of the wash water supplied to the spray device.

In this case, the respective pressures of the wash water and the air supplied to the spraying device fluctuate periodically. The air supplied to the spray device mixed in the wash water supplied to the spray device when the pressure of the air supplied to the spray device exceeds the pressure of the wash water supplied to the spray device.

Periodic pressure fluctuations of the wash water and the air can be obtained without complicating the configurations of the washing water supply device and the air supply device. Therefore, the sanitary washing apparatus can be manufactured at a lower cost.

(2) The pressure of the wash water pressurized by the pressurization device of the wash water and the pressure of the air pressurized by the air pressurization device can be set such that a frequency of fluctuations in the pressure of the air supplied to the spray device is greater than a frequency of fluctuations in the pressure of the wash water supplied to the spray device.

In this case, the frequency of fluctuations in the pressure of the air supplied to the spraying device is greater than the frequency of fluctuations in the pressure of the washing water supplied to the spraying device. This allows the air supplied to the spray device to be mixed regularly in the wash water supplied to the spray device with a simpler configuration. Therefore, wash water and air are sprayed regularly from the spray device in an alternate manner. As a result, separate bodies of water are sprayed regularly from the spray device. Using this wash water offers a highly stable washing sensation to the users.

(3) The pressure of the wash water pressurized by the pressurization device of the wash water and the pressure of the pressurized air by the air pressurization device can be set such that a frequency of fluctuations in the pressure of the air supplied to the device The spray rate is less than a frequency of fluctuations in the pressure of the wash water supplied to the spray device.

In this case, the frequency of fluctuations in the pressure of the air supplied to the spraying device is less than the frequency of fluctuations in the pressure of the washing water supplied to the spraying device. This allows the air supplied to the spray device to be mixed irregularly in the wash water supplied to the spray device with a simpler configuration. Therefore, the wash water and air are sprayed irregularly from the spraying device in an alternate manner. As a result, separate bodies of water are sprayed irregularly from the spraying device. Using this wash water offers a more stimulating washing sensation to the users. (4) The spraying device may also include a flow path that introduces the wash water supplied by the washing water supply device and the air supplied by the air supply device to the spray port, and the pressure of the Washing water supplied by the washing water supply device and the air pressure supplied by the air supply device can be set such that the washing water flowing in the flow path is split by air.

In this case, the wash water flowing in the flow path of the spray device spread through the air, so that the wash water sprayed from the spray port of the spray device is reliably split by air. This allows the wash water to be sprayed reliably from the spray port as separate water bodies.

(5) The sanitary washing apparatus may also include a joint where the washing water supplied by the washing water supply device and the air supplied by the air supply device are joined to be introduced into the flow path of the spray device

In this case, the air supplied by the air supply device and the washing water supplied by the washing water supply device are joined at the joint. Additionally, the wash water flowing in the flow path is efficiently split by air. This allows the wash water and air to be sprayed efficiently from the spraying device in an alternate manner. As a result, the wash water is pressurized by the pressure of the air in a spray direction. Using said washing water also improves the washing power of the washing water. In addition, since sufficient washing can be performed with a small amount of washing water, water saving effects can be obtained.

(6) The sanitary washing apparatus may also include a drive unit that is operated by a user to establish a wash intensity, and a controller that controls at least one of the washing water supply device and the washing device. supply of air such that the pressure of the washing water sprayed from the spraying device reaches a pressure corresponding to the washing intensity set by the drive of the drive unit.

In this case, when the user establishes the intensity of the washing by operating the drive unit, the at least one of the, the washing water supply device and the air supply device is controlled in such a way that the water pressure of Washing sprayed from the spray device reaches the pressure corresponding to the set wash intensity. This allows the pressure of the sprayed wash water from the spray device to be maintained at the pressure corresponding to the set wash intensity. (7) The sanitary washing apparatus may further include a flow detector that detects a flow of the washing water supplied by the washing water supply device, where the controller can control at least one of the water supply device. wash water and the air supply device based on the flow rate detected by the flow detector such that the pressure of the wash water made from the spray device reaches the pressure corresponding to the wash intensity set by the drive the drive unit.

In this case, the at least one of the washing water supply device and the air supply device is controlled based on the flow rate detected by the flow detector. This makes it possible to maintain the pressure of the sprayed wash water from the spray device at the pressure corresponding to the set wash intensity even when the flow of the wash water fluctuates.

(8) The sanitary washing apparatus may also include an instantaneous heating device that heats the washing water supplied from a supply source while causing the washing water to flow and supplying the washing water to the supplying device. wash water in the period in which the wash water is sprayed from the spraying device.

In this case, the washing water supplied from the supply source is instantly heated while flowing through the instantaneous heating device in the period in which the washing water is sprayed. from the spray device. This eliminates the need to repair heated wash water. Additionally, a lack of heated washing water does not occur even though a large amount of washing water is used. In addition, an abnormal increase in the temperature of the wash water in the instant heating device and the heating of the instant heating device without washing water when the sanitary washing device is not in use is avoided. As a result, the sanitary appliance performs resource savings and can provide security.

Effects of the invention

In accordance with the present invention, it is possible to provide a sanitary washing apparatus that is capable of intermittently spraying washing water as separate water bodies, and that can avoid increasing in size and that can be manufactured at a lower cost.

Brief description of the drawings

Figure 1 is an external perspective view of a sanitary washing apparatus in accordance with an embodiment of the present invention;

Figure 2 is a front view of a remote control device of Figure 1;

Figure 3 is a schematic diagram showing the configuration of a main body;

Figure 4 is a partially sectioned sectional view showing an example of the configuration of a heat exchanger;

Figure 5 is an external perspective view of a nozzle device provided within the main body;

Figure 6 is a diagram for explaining a water supply system for washing water in the nozzle device;

Figure 7 is a vertical sectional view of the nozzle device taken along line A-A of Figure 6; Figure 8 is an external perspective view showing a human body wash nozzle protruding from a nozzle guide foot;

Figure 9 is a top view of the human body wash nozzle;

Figure 10 is a bottom view of the human body wash nozzle;

Figure 11 is a side view showing a side of the human body wash nozzle;

Figure 12 is a sectional view of the human body wash nozzle taken along the line B-B of Figure 9;

Figure 13 is a sectional view of the human body wash nozzle taken along the E-E line of Figure 11;

Figure 14 is a sectional view of the human body nozzle taken along the line C-C of Figure 9;

Figure 15 is a sectional view of the human body wash nozzle taken along the line D-D of Figure 9;

Figure 16 is an enlarged sectional view of the tip of the human body wash nozzle of Figure 12;

Figure 17 is a sectional view of the human body wash nozzle taken along the line F-F of Figure 16;

Figure 18 is a schematic sectional view of an air pump;

Figure 19 is a graph showing a first pressure relationship between the water pressure and the air pressure that is maintained when water bodies are sprayed;

Figure 20 is a graph showing a second pressure relationship between the water pressure and the air pressure that is maintained when water bodies are sprayed;

Figure 21 is a graph showing a third relationship between water pressure and air pressure that is maintained when water bodies are sprayed;

Figure 22 is a graph showing another example of a pressure relationship between water pressure and air pressure that is maintained when water bodies are sprayed; Y

Figure 23 is a diagram showing examples of a T-tube.

Best way to carry out the invention

A description of a sanitary washing apparatus will be made according to an embodiment of the present invention while referring to the drawings.

(1) Appearance of the sanitary appliance

Figure 1 is an external perspective view of a sanitary washing apparatus 100 according to an embodiment of the present invention. The sanitary washing apparatus 100 is installed in a bathroom.

As shown in FIG. 1, the sanitary washing apparatus 100 is composed of a main body 200, a remote control device 300, a toilet seat 400, a cover 410 and an input detection sensor 600.

The main body 200 is fixed to a toilet in the bathroom. The toilet seat 400 and the lid 410 are fixed to the main body 200 so that they can be opened and closed. A nozzle device 500 and a washing water supply mechanism, which is not shown, are provided within the main body 200. A controller 90 (Figure 3) to be described later is incorporated into the main group 200.

As shown in Figure 1, part of the nozzle device 500 is exposed in a lower part of the front side of the main body 200. The nozzle device 500 is connected to a tap water pipe through the washing water supply mechanism. At the time of washing the private parts of a human body, a human body wash nozzle 540 (Figure 3), which is described later, protrudes from the exposed part of the nozzle device 500 into the toilet that is not shows, and sprays wash water to private parts of the human body.

The remote control device 300 has a plurality of switches. The remote control device 300 is provided in a place where a user sitting in the toilet seat 400 can operate it, for example.

The input detection sensor 600 is fixed to the bathroom entrance, for example. The input detection sensor 600 is a reflection type infrared ray sensor, for example. In this case, the input detection sensor 600 detects infrared rays reflected from the human body to detect the user's entry into the bathroom.

The controller 90 (Figure 3) of the main body 200 controls the operation of the components of the sanitary washing apparatus 100 based on signals transmitted from the remote control device 300 and from the input detection sensor 600.

(2) Structure of the remote control device

Figure 2 is a front view of the remote control device 300 of Figure 1. In the remote control device 300, a controller cover 302 is fixed to a lower part of the controller body 301, such that it can be opened and close (see arrow in figure 2 (a)).

With the controller cover 302 closed, a water flow switch 320, an air switch 321, intensity adjustment switches 322, 323, and adjustment switches 324, 325 are provided on top of the controller body 301 , and a stop switch 311, a rear switch 312, and a bidet switch 313 are provided on the controller cover 302, as shown in Figure 2 (a).

Switches 311 to 313, 320 to 325 are operated by the user. Then, the signals corresponding to the respective switches 311 to 313, 320 to 325 are sent by radio from the remote control device 300 to the main body 200 of Figure 1. The controller 90 of the main body 200 (Figure 3) controls the operation of the components of the main body 200 (figure 1) and the toilet seat 400 (figure 1) based on the signals received.

For example, when the user operates the rear switch 312 or the bidet switch 313, the wash water is sprayed from the nozzle device 500 (Figure 3), which is described later, to the user's private parts. When the user activates the stop switch 311, the spraying of the wash water from the nozzle device 500 stops.

When the user operates the intensity adjustment switches 322 and 323, the flow rate, pressure, etc. of the sprayed wash water is adjusted to the user's private parts. When the user operates the setting adjustment switches 324 and 325, the position of the human wash nozzle 540 is adjusted (Figure 3), which is described later. Therefore, the position of the spray of the washing water towards the private parts of the user is adjusted.

When the user activates the flow switch 320, the spraying from the sprayed cleaning water to the user's private parts is changed between a linear flow and a dispersed spiral flow, which is described later.

When the user operates the air switch 321, the air is mixed in the washing water flowing in the nozzle device 500. This causes masses of water in the wash water described below to be sprayed intermittently from the nozzle device 500 to the user's private parts.

Figure 2 (b) shows a front view of the remote control device 300 with the controller cover 302 open. As shown in Figure 2 (b), an automatic opening / closing switch 331, a switch 332 for adjusting the water temperature and a switch 333 for adjusting the temperature of the toilet seat, as well as the stop switch 311 described above, the rear switch 312, and the bidet switch 313 are provided in the lower part of the body 301 controller that is covered with controller cover 302.

Also when these switches 311 to 313, 331 to 333 are actuated, the signals corresponding to the respective switches 311 to 313, 331 to 333 are sent by radio from the remote control device 300 to the main body 200. Therefore, the controller 90 of the main body 200 controls the operation of the components of the main body 200 and the toilet seat 400 based on the signals received.

When the automatic opening / closing switch 331 is in the on state, the lid 410 opens / closes in response to user input into the bathroom.

When the user operates the water temperature adjustment switch 332, the temperature of the sprayed washing water from the nozzle device 500 is adjusted to the user's private parts. When the user operates the toilet seat temperature adjustment switch 333, the temperature of the toilet seat 400 is adjusted.

(3) Configurations of the water supply system and the control system in the main body

Figure 3 is a schematic diagram showing the configuration of the main body 200. As shown in Figure 3, the main body 200 includes a tap 2 of tap water, a filter 4, a check valve 5, a constant flow valve 6, an electromagnetic shut-off valve 7, a sensor 8 of flow, a heat exchanger 9, a water pump 11, a reserve tank 12, the nozzle device 500, vacuum circuit breakers 31, 61, thermistors S1, S2 and the controller 90.

The tap 2 of tap water is inserted into a tap water pipe 1. The filter 4, the check valve 5, the constant flow valve 6, the electromagnetic shut-off valve 7, the thermistor S1 and the flow sensor 8 from the upstream side to the downstream side are sequentially inserted into the pipe 3 connected between the tap 2 of bypass water and the heat exchanger 9. The thermistor S2, the water pump 11 and the reserve tank 12 from the upstream side to the downstream side are inserted sequentially into a pipe 10 connected between the heat exchanger 9 and the nozzle device 500.

The nozzle device 500 includes a switching valve 13, an air pump 14, a human body wash nozzle 540, and a nozzle wash nozzle 520. A linear flow path 551, a spiral flow path 552, and a bidet flow path 553 are made in the human body wash nozzle 540. A switching valve motor 13m is connected to the switching valve 13.

The switching valve 13 includes a plurality of ports. The flow paths 551, 552, 553 of the human body wash nozzle 540 and the nozzle wash nozzle 520 are connected to the plurality of ports of the switching valve 13, respectively. The air pump 14 is connected between hoses h6, h7 (Figure 6), which are described later, which connect the switching valve 13 and the linear flow path 551 of the nozzle device 500.

The vacuum circuit breaker 31 is connected to a bypass pipe 30 that extends from a portion of the pipe 3 between the solenoid shut-off valve 7 and the flow sensor 8, and is located in a position higher than a spray opening of wash water from heat exchanger 9. One end of the branch line 32 is connected to the circuit breaker 31. The branch line 30 and the branch line 32 are connected through the vacuum circuit breaker 31. The other end of the bypass pipe 32 is placed in the toilet, for example.

The vacuum circuit breaker 61 is provided in the reserve tank 12, and is located in a position higher than the heat exchanger 9. The vacuum circuit breaker 61 and the reserve tank 12 are integrated. Accordingly, the reserve tank 12 is also located in a higher position than the heat exchanger 9.

Next, the flow of the wash water in the main body 200 and the control of the components of the main body 200 by the controller 90 will be described.

Purified water flowing in the tap water pipe 1 is supplied as wash water to the filter 4 by the tap 2 of tap water. The particles, impurities, etc., contained in the wash water, are removed by the filter 4.

Then, the check valve 5 prevents the return flow of the wash water in the pipe 3, and the constant flow valve 6 maintains the constant flow of the wash water flowing in the pipe 3. Next, the shut-off valve 7 Electromagnetic changes the supply of the wash water to the heat exchanger 9. The operation of the solenoid shut-off valve 7 is controlled by the controller 90.

The thermistor S1 measures the temperature of the wash water flowing in the pipe 3, and applies the measured temperature value to the controller 90. The flow sensor 8 measures the flow rate of the wash water flowing in the pipe 3, and applies the flow value measured to controller 90. Heat exchanger 9 heats the washing water supplied through the pipe 3 at given temperatures. Details of the heat exchanger 9 will be described later. The water pump 11 then supplies the washing water heated by the heat exchanger 9 to the switching valve 13 of the nozzle device 500 through the reserve tank 12 while heating the washing water. Thermistor S2 measures the temperature of the wash water flowing in the pipe 10, and applies the measured temperature value to the controller 90.

The operation of the heat exchanger 9 and the water pump 11 is controlled by the controller 90 based on the flow value measured by the flow sensor 8 and the temperature values measured by the thermistors S1, S2.

The reserve tank 12 functions as a reserve for heated washing water. This suppresses temperature variations of the wash water supplied to the switching valve 13.

The human body wash nozzle 540 is used to wash the user's private parts. The nozzle wash nozzle 520 is used to wash the portion of the human body wash nozzle 540 from which the wash water is sprayed.

When the motor 13m of the switching valve is operated, the switching valve 13 of the nozzle device 500 selectively supplies the wash water supplied from the water pump 11 to the human body wash nozzle 540 or from the nozzle 520 nozzle wash. This causes the wash water to be sprayed from the human body wash nozzle 540 or from the nozzle wash nozzle 520. The motor drive 13m of the switching valve is controlled by the controller 90.

In this case, the air pump 14 operates when the air switch 321 of Figure 2 is operated by the user with the wash water being supplied from the water pump 11 to the linear flow path 551 of the nozzle 540 of human body wash. The air pump 14 then mixes air in the wash water flowing from the switching valve 13 to the linear flow path 551. This causes masses of wash water, described later, to be sprayed intermittently from the nozzle device 500.

An extra part, which is not used in the nozzle device 500, of the wash water supplied from the solenoid shut-off valve 7 to the heat exchanger is discharged as discarded water into the toilet through the bypass pipe 30 and the branch pipe 32. That is, bypass pipe 30 and bypass pipe 32 function as a discarded water circuit.

The vacuum circuit breaker 31 is provided upstream of the heat exchanger 9, and the vacuum circuit breaker 61 is provided downstream of the heat exchanger 9. Therefore, the wash water is prevented from leaking out of the heat exchanger 9 even when a negative pressure is formed in the pipe 3 or in the pipe 10. This prevents heating of the heat exchanger.

(4) Heat exchanger

Figure 4 is a partially sectioned sectional view showing an example of the configuration of the heat exchanger 9. As shown in Figure 4, the heat exchanger 9 includes a resin housing 433 and a coil pipe 431.

The curved coil pipe 431 is integrated in the resin shell 433. A flat plate ceramic heater 432 with high power density is provided in contact with the coil pipe 431. As indicated by the arrows Y, the wash water is supplied from a supply opening 434 into the coil pipe 431, efficiently heated by the ceramic heater 432 while flowing in the coil pipe 431 and discharged from the discharge opening 435.

The thermistor S2 of Figure 3 is integrated with the heat exchanger 9 while it is located in the vicinity of the discharge opening 435 in this example. The controller 90 of Figure 3 applies a temperature feedback control of the ceramic heater 432 of the heat exchanger 9 based on the measured temperature value applied from the thermistor S2.

As described above, the heat exchanger 9 is an instantaneous heating device that instantly heats the washing water flowing in the coil pipe 431 inside it. Therefore, a required amount of wash water can be instantly heated to the desired temperatures.

The wash water previously heated to temperatures given before the washing of the user's private parts need not be stored and kept warm in the sanitary washing apparatus 100 which includes the heat exchanger 9. This eliminates the need to provide a storage tank for the wash water and achieves a reduced size and energy savings of the sanitary washing apparatus 100. Additionally, a lack of heated washing water to the given temperatures is avoided, even if the washing time period is extended or the sanitary washing apparatus 100 is continuously used by a plurality of users.

The ceramic heater 432 of the heat exchanger 9 is brought to a power of up to 1200 W, for example. In this case, the heat exchanger 9 can heat the washing water flowing in the coil pipe 431 from 5 ° C to 42 ° C at 500 cc / min, for example. The ceramic heater 432 heats the wash water only during operation of the water pump 11 (figure 3) based on the control by the controller 90 (figure 3). Accordingly, an abnormal increase in the temperature of the wash water in the heat exchanger 9 and the heating of the heat exchanger 9 without washing water can be avoided.

Although the ceramic plate-shaped heater 432 with a high power density is used as a heat source of the heat exchanger 9 in the example described above, the configuration of the heat source is not limited to this. For example, a sheathed heater, a mica heater, a sheet heater or the like can be used as the heat source of the heat exchanger 9.

Although the controller 90 controls the temperature of the ceramic heater 432 of the heat exchanger 9 by means of the feedback control in the present embodiment, the present invention is not limited to this. For example, the controller 90 can control the temperature of the ceramic heater 432 by means of a feedback control, or it can perform a complex control in which it controls the ceramic heater 432 by applying a feedback control for the temperature rise and by applying a feedback control For normal operation.

(5) The nozzle device

(5-a) General configuration of the nozzle device

Figure 5 is an external perspective view of the nozzle device 500 provided in the main body 200. As shown in Figure 5, the main body 200 includes a lower housing 200U fixed to an upper end surface of the toilet. The nozzle device 500 and the washing water supply mechanism are provided on the lower housing 200U. Figure 5 shows no other components other than the nozzle device 500 provided in the lower housing 200U.

The nozzle device 500 includes a nozzle guide foot 590. The nozzle guide foot 590 is provided substantially in the center of the lower housing 200U. The air pump 14 that is part of the nozzle device 500 is further provided with the nozzle guide foot 590 in the lower housing 200U.

The human body wash nozzle 540 having a substantially column shape is mounted on an upper part of the nozzle guide foot 590 such that it can move forward or retract while leaning towards the horizontal plane. The human body wash nozzle 540 protrudes outwardly from the front end of the nozzle guide foot 590 when the private parts of the human body are washed, and is accommodated inside the front end of the nozzle guide foot 590 when not the private parts of the human body are washed, as described later.

The switching valve 13 is mounted adjacent to the human body wash nozzle 540 on the nozzle guide foot 590. The switching valve motor 13m is connected to the switching valve 13.

A nozzle advance / reverse motor 546a is provided in the center below the human body wash nozzle 540. Details of the 546a nozzle forward / reverse motor will be described later. The water pump 11 of Fig. 3 and the water pump motor 11 m for driving the water pump 11 are provided in a rear portion below the human body wash nozzle 540 and the switching valve 13. A plurality of hoses h1 to h8 is used to connect the components involved in the water supply system of the nozzle device 500 in this example. Details of hoses h1 to h8 will be described later.

In this state, the upper housing is fixed to cover the lower housing 200U, the nozzle device 500 and the washing water supply mechanism. The toilet seat 400 and the lid 410 of Figure 1 are fixed to the upper housing.

(5-b) The water supply system of the nozzle device

Figure 6 is a diagram for explaining the water supply system of the wash water in the nozzle device 500. Figure 6 shows part of the components that constitute the nozzle device 500 except for the air pump 14 of Figure 5.

The linear flow path 551 (Figure 3), the spiral flow path 552 (Figure 3), and the bidet flow path 553 (Figure 3) are formed in the human body wash nozzle 540. Details will be described later. A linear port 551p, a spiral port 552p and a bidet port 553p that communicate with the linear flow path 551, the spiral flow path 552 and the bidet flow path 553, respectively, are provided at the rear end of the nozzle 540 human body wash.

A tip housing 521 that can accommodate the tip of the human body wash nozzle 540 when the private parts of the human body are not washed is fixed to the front end of the nozzle guide foot 590. With the human body wash nozzle 540 accommodated in the nozzle guide foot 590, the tip housing 521 is formed in a cylindrical shape such that it covers the tip of the human body wash nozzle 540 and a region in which proximity of it.

The nozzle wash nozzle 520 for supplying wash water to the inside of the tip housing 521 is provided in an upper portion of the tip case 521. A nozzle wash port 520p is provided in the nozzle wash nozzle 520. A nozzle plug 522 capable of opening / closing a front end opening of the tip housing 521 is provided at the front end of the tip housing 521.

A supply port 131, a nozzle wash / discharge port 132, a spiral discharge port 133, a bidet discharge port 134 and a linear discharge port 135 are provided in the switching valve 13.

In this case, the switching valve 13 is composed of an outer cylinder and an inner cylinder. Ports 131 to 135 above are provided in the outer cylinder. A plurality of holes and grooves is formed in the inner cylinder. The inner cylinder is inserted in the outer cylinder.

The switching valve motor 13m is a stepper motor capable of adjusting the rotation angle of a rotation shaft, for example. The rotation shaft of the switching valve motor 13m is connected to one end of the inner cylinder. The switching valve motor 13m operates to rotate the inner cylinder inside the outer cylinder, and the supply port 131 selectively communicates with any of, the nozzle wash / discharge port 132, the spiral discharge port 133, the bidet discharge port 134 and the linear discharge port 135 depending on the angle of rotation.

When the inner cylinder of the switching valve 13 is located at a given angle of rotation with respect to the outer cylinder, the supply port 131 does not communicate with any of the nozzle wash / discharge port 132, the port 133 of spiral discharge, bidet discharge port 134, and linear discharge port 135 (a completely closed state). In this case, the wash water supplied from the supply port 131 is pushed back by an outer peripheral surface of the inner cylinder of the switching valve 13. The wash water pushed back flows back to the vacuum circuit breaker 31 of Figure 3, and passes through the bypass pipe 32 to be released into the toilet.

The switching valve 13 is controlled to be in the fully closed state mentioned above when the input detection sensor 600 detects that a user enters the bathroom or when the sitting sensor, not shown, detects that the user has sitting on toilet seat 400. The wash water is released before the user uses the toilet, so that a water screen is formed on an inner surface of the toilet. This prevents adhesion of debris to the inside surface of the toilet. The water pump 11 provided in the rear portion below the human body wash nozzle 540 has a supply port and a wash water discharge port. One end of the hose h1 is connected to the supply port of the water pump 11, and one end of the hose h2 is connected to the discharge port of the water pump 11. The hoses hi, h2 correspond to the pipe 10 of Figure 3. The other end of the hose h2 is connected to the supply port 131 of the switching valve 13. The supply port 131 of the switching valve 13 is connected to the discharge port of the water pump 11 through the hose h2.

The nozzle wash / discharge port 132 of the switching valve 13 is connected to the nozzle wash port 520p of the nozzle wash nozzle 520 through the hose h3. The spiral discharge port 133 of the switching valve 13 is connected to the spiral port 552p of the human body wash nozzle 540 through the hose h4. The bidet discharge port 134 of the switching valve 13 is connected to the bidet port 553p of the human body wash nozzle 540 through the hose h5.

The linear discharge port 135 of the switching valve 13 is connected to a port of a T-tube 503 through the hose h6. Another port of the T-tube 503 is connected to the linear port 551p of the human body wash nozzle 540 through the hose h7. Another port of the T-tube 503 is connected to the air pump 14 of Figure 5 through the hose h8.

The wash water supplied by the supply port 131 of the switching valve 13 is supplied to at least one of the linear port 551p, the spiral port 552p and the bidet port 553p of the human body wash nozzle 540 for washing the private parts of the human body. This causes the wash water to be sprayed from the nozzle 540 of the human body wash to the private parts of the human body.

When the air switch 321 of Figure 2 is operated by the user with the wash water being supplied to the linear port 551p of the human body wash nozzle 540, the air is supplied from the air pump 14 through the hose h8 of Figure 5 to be mixed in the wash water sent from the switching valve 13 to the tube 503 in T through the hose h6.

This causes the wash water to be sprayed intermittently from the nozzle 540 of the human body wash to the private parts of the human body as separate bodies of water as described below.

The wash water supplied to the supply port 131 of the switching valve 13 is supplied to the nozzle wash port 520p of the nozzle wash nozzle 520 for washing the human body wash nozzle 540. In this case, the wash water is supplied from the nozzle wash nozzle 520 to the inside of the tip housing 521. At this time, the wash water flows to stir along an outer peripheral surface of the human body wash nozzle 540 inside the tip housing 521. This causes the tip of the human body wash nozzle 540 and the region in the vicinity thereof to be washed.

(5-c) Forward / reverse mechanism of the human body wash nozzle

Figure 7 is a vertical sectional view of the nozzle device 500 taken along line AA of Figure 6. The plurality of hoses h1 to h8 of Figure 6 are shown in the nozzle device 500 of Figure. 7.

As shown in Figure 7, a zipper 540r is provided on a lower surface of the human body wash nozzle 540 along a direction of the axial center of the human body wash nozzle 540. A nozzle advance / reverse motor 546a is fixed to the nozzle guide foot 590 below the human body wash nozzle 540.

A worm gear, not shown, is fixed to a rotation shaft of the nozzle advance / reverse motor 546a. A transmission gear 546b is provided below the human body wash nozzle 540 so that it engages with the worm gear. A pinion gear 546c is provided so that it engages the transmission gear 546b and the rack 540r of the human body wash nozzle 540.

When the forward / reverse motor 546a is driven, the torque is transmitted to the rack 540r of the human body wash nozzle 540 through the worm gear, the transmission gear 546b and the pinion gear 546c. This causes the human body wash nozzle 540 to advance and retract along the direction of its axial center as indicated by a thick arrow in Figure 7.

A rotation sensor 547 is fixed to the nozzle advance / reverse motor 546a. The rotation sensor 547 detects a rotation angle of the nozzle advance / reverse motor 546a, and applies it to the controller 90 of Figure 3. Accordingly, the controller 90 of Figure 3 controls the forward / reverse motor 546a of nozzle based on the signals applied from the remote control device 300 of Figure 2 and the angle of rotation applied from the rotation sensor 547, and adjusts an amount of movement of the human body wash nozzle 540.

Figure 8 is an external perspective view showing the human body wash nozzle 540 protruding from the nozzle guide foot 590. The plurality of hoses h1 to h8 of Figure 6 is not shown in the nozzle device 500 of Figure 8.

The nozzle advance / reverse motor 546a is operated when the rear switch 312 or the bidet switch 313 of Figure 2 is operated by the user. This causes the human body wash nozzle 540 to protrude a given length from the front end of the nozzle guide foot 590 as shown in Figure 8. Then, the wash water is sprayed from a formed hole 540h in the vicinity of the tip of the human body wash nozzle 540.

The amount of movement of the nozzle advance / reverse motor 546a differs when the rear switch 312 of Figure 2 is actuated and when the bidet switch 313 of Figure 2 is actuated. The length of the protruding portion of the human body wash nozzle 540 when the rear switch 312 is actuated is greater than the length of the protruding portion of the human body wash nozzle 540 when the bidet switch 313 is actuated.

(5-d) Human body wash nozzle configuration

Figure 9 is a top view of the human body wash nozzle 540, Figure 10 is a bottom view of the human body wash nozzle 540, and Figure 11 is a side view showing one side of the nozzle 540 Human body wash. Figure 12 is a sectional view of the human body wash nozzle 540 taken along the line BB of Figure 9, and Figure 13 is a sectional view of the human body wash nozzle 540 taken at along line EE of Figure 11. Figure 14 is a sectional view of the human body wash nozzle 540 taken along line CC of Figure 9 and Figure 15 is a sectional view of the human body wash nozzle 540 taken along the line DD of figure 9. Figure 16 is an enlarged sectional view of the tip of the human body wash nozzle 540 of figure 12, and figure 17 is a sectional view of the human body wash nozzle 540 taken along the FF line of Figure 16.

As shown in Figures 9 to 11, the human body wash nozzle 540 includes a nozzle cover 50, a zipper support 60 and a nozzle body 70.

The nozzle cover 50 has a cylindrical shape with its closed end. The hole 540h is formed in the vicinity of one end on an upper surface of the nozzle cover 50. A drain port 50g is formed in the vicinity of one end of a lower surface of the nozzle cover 50. A groove 52 is formed in a portion from the other end to substantially the center of the nozzle cover 50.

The zipper support 60 has a long size shape. The nozzle body 70 is attached on an upper surface of the rack support 60. In this state, the nozzle body 70 is held by the rack support 60 so that it is able to slide in a longitudinal direction of the rack holder 60. The zipper 540r is provided on the bottom surface of the zipper support 60.

The zipper support 60 that holds the nozzle body 70 is fixed to the other end of the nozzle cover 50. This causes part of the nozzle body 70 to be inserted into the nozzle cover 50. The zipper 540r attached to the zipper support 60 is adjusted with the groove 52 of the nozzle cover 50.

A leaf spring support 542 is provided on a side surface of the rack support 60. A leaf spring FS having a projection is fixed to the leaf spring support 542. The leaf spring FS is arranged such that the projection is opposite a lateral surface of the nozzle body 70.

Two grooves G1, G2 are formed at a distance in a longitudinal direction of the nozzle body 70 on a lateral surface in the vicinity of the rear end of the nozzle body 70. The projection of the leaf spring FS can be adjusted within the two slots G1, G2 with the nozzle body 70 located in the rack holder 60. The projection of the leaf spring FS fits into any of the two slots G1, G2 so that the nozzle body 70 is located on the rack support 60.

As shown in Figs. 12 to 15, the linear flow path 551, the spiral flow path 552 and the bidet flow path 553 are formed to extend in the longitudinal direction inside the nozzle body 70 of the nozzle 540 human body wash. A reserve tank 554 is formed to extend parallel to the three paths 551 to 553.

As shown in Figure 12, the linear flow path 551 communicates with the linear port 551p on the rear end side of the nozzle body 70, and the bidet flow path 553 communicates with the bidet port 553p on the rear end side of the nozzle body 70. As shown in Figure 13, the spiral flow path 552 communicates with the spiral port 552p on the rear end side of the nozzle body 70.

The inner diameter of each of, the linear flow path 551 and the spiral flow path 552 is 3.0 mm to 3.5 mm, for example.

As shown in Figure 16, a rear spray port 555a and a bidet spray port 555b are formed on an upper surface in the vicinity of the tip of the human body wash nozzle 540. The rear spray port 555a is located opposite the bidet spray port 555b. A column mixing chamber 551a that communicates with the rear spray port 555a is formed in the inside of the human body wash nozzle 540 in the vicinity of the tip of the human body wash nozzle 540.

The tip of the linear flow path 551 communicates with the mixing chamber 551a so that it extends toward the axial center of the mixing chamber 551a. The wash water supplied from the linear port 551p (Figure 12) flows in the linear flow path 551, and flows into the mixing chamber 551a from a lower portion towards the axial center of the mixing chamber 551a. The wash water flows from the lower portion of the mixing chamber 551a to the rear spray port 555a. This causes a linear flow to be sprayed from the rear spray port 555a.

As shown in Figure 17, the tip of the spiral flow path 552 communicates with the mixing chamber 551a so that it is eccentric from the axial axis of the mixing chamber 551a. The wash water supplied from the spiral port 552p (Figure 13) passes through the spiral flow path 552 and flows into the mixing chamber 551a along an inner peripheral surface of the mixing chamber 551a. At this time, a spiral component is given to the wash water in the mixing chamber 551a. This causes a spiral flow to be sprayed from a subsequent spray port 555a.

When the wash water is supplied only to the linear flow path 551, the linear flow is sprayed from the rear spray port 555a. When the wash water is supplied to the linear flow path 551 and the spiral flow path 552, a dispersed spiral flow having a divergent angle is sprayed from the rear spray port 555a.

As shown in Figure 16, the tip of the bidet flow path 553 is bent to communicate with the bidet spray port 555b. The inner diameter of the bidet flow path 553 is 3.0 mm to 3.5 mm, for example. An ejector 556 having an inside diameter of reduced size is interposed in the air flow path 553. The inside diameter of the ejector 556 is 1.0 mm to 1.5 mm, for example. An inlet air mixing hole 557 having the inside diameter of approximately 1.0 mm, for example, is provided in the vicinity of ejector 556. The wash water supplied from the bidet port 553p (Figure 12) flows in the bidet flow path 553 to be sprayed from the bidet spray port 555b. The reserve tank 554 shown in Figures 13 and 14 is a flow path having a circular cross section. Both ends of the reserve tank 554 are closed. The inner diameter of the reserve tank 554 is 3.0 mm to 3.2 mm, for example. The reserve tank 554 communicates with the bidet flow path 553 upstream of the ejector 556. The reserve tank 554 has a function of removing the pulsation of the wash water flowing in the bidet flow path 553.

The pressure of the wash water supplied to the bidet flow path 553 by the water pump 11 (Figure 3) pulses in some cases. In particular, the pulsating wash water with a high pressure cannot pass through the ejector 556 having the small inside diameter and cannot reach the tip of the bidet flow path 553.

In that case, the wash water is pushed back to the rear end side of the bidet flow path 553 by the ejector 556, and flows into the reserve tank 554 (Figure 12) through a communication path that does not It is shown. This causes the air inside the reserve tank 554 to be compressed by the pressure of the wash water. As a result, the pressure fluctuations of the wash water are absorbed, and the pulsation of the wash water is relaxed.

The wash water whose relaxed pulsations returns from the reserve tank 554 to the bidet flow path 553 through the communication path that is not shown, passes through the ejector 556 having the small inside diameter, and reaches the tip of the 553 bidet flow path. In this case, the wash water flows from the ejector 556 having a small inside diameter within a portion of the bidet flow path 553 that has the large inside diameter, so that a stirring flow is generated by agitation. in the wash water. This further relaxes the pressure pulsation of the wash water. Accordingly, a gentle flow of wash water is sprayed with a small pressure pulse from the bidet spray port 555b.

As shown in Figure 9, when the human body wash nozzle 540 is accommodated in the nozzle guide foot 590, the projection of the leaf spring FS fits into the rear side slot G2 of the nozzle body 70 . In this state, the bidet spray port 555b of the nozzle body 70 coincides with the hole 540h of the nozzle cover 50.

In this case, a coupling projection 70p is formed on the upper surface of the nozzle body 70 as shown in Figures 9, 11 and 12. As shown in Figure 8, when the wash nozzle 540 of human body advances towards the nozzle guide foot 590 of figure 8, the projection of the leaf spring FS fits in the groove G2 on the rear end side of the nozzle body 70 until the hitch projection 70p of the figure 11 abuts against the tip housing 521 of Figure 8.

In this case, the wash water is sprayed from the bidet spray port 555b of the nozzle body 70 through the hole 540h of the nozzle cover 50.

When the engagement boss 70p of the nozzle body 70 abuts against the tip housing 521 of Figure 8, the advance of the nozzle body 70 towards the nozzle cover 50 and the rack support 60 is restricted. Therefore, the hooked state between the leaf spring FS and the groove G2 of the nozzle body 70 is released, the nozzle body 70 slides over the rack holder 60, and the projection of the leaf spring FS is engaged in the G1 slot front side of the nozzle body 70.

In this state, the rear spray port 555a of the nozzle body 70 coincides with the hole 540h of the nozzle cover 50. Therefore, the wash water is sprayed from the rear spray port 555a of the nozzle body 70 through the hole 540h of the nozzle cover 50.

In the present embodiment, the rear spray port 555a of the nozzle body 70 is held in the position of the hole 540h of the nozzle cover 50 when the rear switch 312 is actuated, and the bidet spray port 555b of the body Nozzle 70 is held in the position of the hole 540h of the nozzle cover 50 when the bidet switch 313 is operated.

In the present embodiment, a relationship of an area of the flow path that communicates with the linear flow path 551 and an area of the flow path that communicates with the spiral flow path 552 can be changed in the valve 13 switching. This allows the water sprayed from the rear spray port 555a to be switched successively between the linear flow and the spiral flow. The linear flow does not substantially have the spiral component. Using the linear flow, the wash water is allowed to be focused at a given point, therefore, washing the given point. The dispersed spiral flow is obtained by increasing the spiral component of the wash water. Using the dispersed spiral flow allows a larger area to be washed while causing the wash water to be dispersed. Also, a dispersion angle of the dispersed wash water from the rear spray port 555a can be controlled.

In addition, a flow of the sprayed wash water from the rear spray port 555a and a flow of the sprayed wash water from the bidet spray port 555b can be adjusted by changing the respective flow path areas that communicate with path 551 linear flow and the spiral flow path 552 and the bidet flow path 553 in the switching valve 13.

(5-e) The air pump

Figure 18 is a schematic sectional view of the air pump 14. A diaphragm pump is used as the air pump 14 in the present embodiment.

As shown in Figure 18, the air pump 14 includes a housing 14a, a pump engine 14b, a crankshaft body 14c, a drive shaft 14d, a swinging member 14e, a plurality of squeezers 14g, and a plurality of diaphragms 14h made of rubber and a reality of umbrella valves 14i. In the example of Figure 18, two squeezers 14g, two diaphragms 14h and two umbrella valves 14i are provided.

A discharge port 14j is provided in a central portion on an upper surface of the housing 14a, and a plurality of supply ports 14k is provided in the vicinity of the discharge port 14j.

The pump motor 14b is provided below the housing 14a such that its rotation shaft penetrates a central portion on a lower surface of the housing 14a. The crankshaft body 14c has a column shape. The rotation shaft of the pump motor 14b is fixed perpendicular to the center on a lower surface of the crankshaft body 14c. The drive shaft 14d is fixed to an outer portion of the center on an upper surface of the crankshaft body 14c so that it is inclined. The oscillation member 14e is fixed to the drive shaft 14d. In this state, the oscillation member 14e is held to be able to slide in a direction of rotation of the drive shaft 14d.

The plurality of crushers 14g is fixed to the oscillation member 14e along an outer periphery thereof. The umbrella valve 14i is fixed to each of the supply ports 14k of the housing 14a. The diaphragm 14h is provided on a surface inside the housing 14a to cover a lower end of each umbrella valve 14i and each supply port 14k.

When the rotation shaft of the pump motor 14b is controlled to rotate by the controller 90 (Figure 3), the crankshaft body 14c rotates to cause the drive shaft 14d and the swing member 14e to rotate in an inclined state. This causes the oscillation member 14e to oscillate. Therefore, the plurality of squeezers 14g moves sequentially up and down, and sequentially presses the plurality of diaphragms 14h. The air flow within an internal space of the diaphragm 14h that is not pressed through the supply port 14k. Pressing each diaphragm 14h causes the umbrella valve 14i correspondingly close the supply port 14k, and causes the air in the internal space of the diaphragm 14h to be discharged outward through the discharge port l4 j.

In this way, the rotation of the rotation shaft of the pump motor 14b causes air to flow sequentially into the internal spaces of the plurality of diaphragms 14h from the plurality of supply ports 14k and causes the air in the internal spaces of the plurality of diaphragms 14h are sequentially discharged abroad through the discharge port 14j. Accordingly, the pressure of the air discharged from the discharge port 14j fluctuates periodically to form a substantially full waveform.

Also, the pressure of the air discharged from the discharge port 14j can be substantially constant by increasing the number of supply ports 14k, the squeezers 14g, the diaphragm 14h and the umbrella valves 14i.

(6) Water pump discharge pressure

The discharge pressure of the wash water by the water pump 11 of Figure 3 is referred to as a water pressure in the following description. In the present embodiment, an alternate pump that pressurizes the wash water by alternating operation of a piston in a cylinder is used as the water pump 11. Therefore, the water pressure fluctuates periodically within a range of fluctuation to form a substantially sinusoidal waveform during operation of the water pump 11. In the alternate pump, the torque of the water pump motor 11m of Figure 5 generates a power to move the piston. Accordingly, the water pressure is adjusted by controlling the rotation speed of the water pump motor 11m. For example, when the rotation speed of the water pump motor 11m (figure 5) increases, a frequency of water pressure fluctuations increases and a period of fluctuation is shortened. In addition, the fluctuation range of water pressure increases, and the center of fluctuation becomes higher. Meanwhile, when the rotational speed of the water pump motor 11m decreases, the water pressure fluctuations decrease, and the period of fluctuation is lengthened. Additionally, the water pressure fluctuation range decreases, and the center of fluctuation becomes lower.

The user can set the wash intensity at a plurality of levels by operating the intensity adjustment switches 322, 323 (Figure 2). The plurality of wash intensity levels corresponds to a plurality of water pressure levels. The plurality of water pressure levels corresponds to a plurality of rotational speeds of the water pump motor 11m.

In this case, the controller 90 of Figure 3 stores a relationship between the plurality of water intensity levels that can be established by actuating the intensity adjustment switches 322, 323 and the plurality of motor rotation speeds 11m Water pump

Therefore, the controller 90 controls the rotation speed of the water pump motor 11m based on the wash intensity set by the user using the intensity adjustment switches 322, 323. This causes the water pressure to fluctuate depending on the setting of the intensity adjustment switches 322, 323 by the user.

Even if the rotation speed of the water pump motor 11m is constant, the water pressure fluctuates depending on the fluctuation of the pressure of the wash water supplied to the water pump 11. A constant relationship exists between the water pressure of the water pump 11 and the flow rate of the washing water flowing in the pipe 3 of Figure 3. Therefore, the controller 90 applies a feedback control to the rotation speed. of the water pump motor 11m based on the flow value measured by the flow sensor 8 of Figure 3 in the present embodiment.

In this case, the controller 90 previously stores a relationship between the plurality of wash levels that can be set using the intensity adjustment switches 322, 323 and the wash water flow rate, and controls the motor rotation speed 11m of water pump such that the flow value measured by the flow sensor 8 reaches a flow corresponding to the wash intensity established based on the correspondence ratio. This causes the water pressure to be precisely adjusted to the pressure corresponding to the establishments of the intensity adjustment switches 322, 323 (figure 2) by the user. The flow sensor 8 applies an average value of the fluctuating flow of the wash water over a certain period of time (0.5 seconds, for example) to the controller 90 as the measured flow value.

(7) Air pump discharge pressure

The air discharge pressure by the air pump 14 of Figure 3 is referred to as an air pressure in the following description.

As described above, the diaphragm pump is used as the air pump 14. In the air pump 14, the torque of the pump motor 14b of Figure 8 generates a power to move the diaphragms 14h. Therefore, the air pressure is adjusted by controlling the rotation speed of the pump motor 14b.

For example, when the speed of rotation of the pump motor 14b increases, a frequency of air pressure fluctuations increases, and a period of fluctuation is shortened. In addition, a range of air pressure fluctuations increases, and the center of fluctuation becomes higher. Meanwhile, when the rotation speed of the pump motor 14b decreases, the frequency of air pressure fluctuations decreases, and the period of fluctuation is lengthened. Additionally, the air range of pressure fluctuations decreases, and the center of fluctuation becomes lower. A drive pulse is supplied to the pump motor 14b. The rotation speed of the pump motor 14b can be adjusted by changing a working ratio of the drive pulse. In this case, the air is less likely to be mixed in the wash water as the wash water flow rate increases, so that the wash water is less likely to be split by the air in the flow path 551 linear of Fig. 3. Therefore, the wash water is not susceptible to being sprayed from the human body wash nozzle 540 of Fig. 3 as separate bodies of water. Therefore, the working ratio of the drive pulse of the pump motor 14b is controlled in such a way that the air pressure increases with the increase in the flow of the wash water in the present embodiment.

The controller 90 of Figure 3, previously stores a map representing a relationship between the flow of the wash water and the working ratio of the drive pulse. The map is created based on the relationship between the flow of the wash water and the air pressure required to form water masses of the wash water. The controller 90 applies a direct action control to the rotation speed of the pump motor 14b based on the flow rate measured by the flow sensor 8 and the preset map. In this case, the controller 90 acquires a value of the working relationship corresponding to the flow value measured by the flow sensor 8 from the map and adjusts the working ratio of the drive pulse of the pump motor 14b to the acquired value. This causes water bodies to be sprayed reliably from the nozzle device 500 regardless of the flow of the wash water.

(8) Relationship between water pressure and air pressure

As described above, when the user operates the air switch 321 of Figure 2 during the washing of the private parts of the human body, masses of water of washing water are intermittently sprayed from the washing nozzle 540 of human body to the user's private parts. The air pressure is set to exceed the water pressure at least once during a washing period where the private parts of the human body are washed. The relationships between water pressure and air pressure established in the previous way are illustrated in the following paragraphs. In this case, the wash period refers to the period in which the wash water is sprayed from the human body wash nozzle 540 due to the operation of the rear switch 312 by the user.

(8-a) First pressure ratio

Figure 19 is a graph showing a first pressure relationship between the water pressure and the air pressure that is maintained when the water bodies are sprayed. In Figure 19, the ordinate represents the pressure and the abscissa represents time. The dashed line wp indicates the water pressure caused by the water pump 11, and the solid line ap indicates the air pressure caused by the air pump 14.

As shown in Figure 19, the water pressure caused by the water pump 11 fluctuates periodically in a range from a minimum zero value to a maximum Pb value in this example. Meanwhile, the air pressure caused by the air pump 14 remains substantially constant at a value Pa that is greater than the minimum null value and less than the maximum Pb value of the water pressure.

In this case, the air pressure periodically exceeds the water pressure as indicated by the scratch in Figure 19. At this time, the air is mixed in the wash water not as split air bubbles but as masses of air. Therefore, when the air masses flow in the linear flow path 551 of Figure 3, the air masses u substantially occupy the entire cross section of the flow path. Therefore, the wash water in the linear flow path 551 is split by the air masses, and the water masses and air masses are formed alternately in the linear flow path 551. The water masses and the air masses flowing in the linear flow path 551 are sprayed intermittently in an alternate manner from the rear spray port 555a of Figure 16.

In particular, the interior of the linear flow path 551 is made smooth, so that the formation of smaller water masses and air masses in the linear flow path 551 can be suppressed.

Immediately after being sprayed from the subsequent spray port 555a, the wash water is in the form of substantially spherical water bodies due to surface pressure. Said water bodies are focused and sprayed intermittently to the private parts, so that the washing power is significantly improved compared to a case in which the washing water is continuously sprayed to the private parts to a uniform flow. The wash water that has the air mixed therein provides water saving effects because sufficient washing power is obtained with a small amount of wash water.

When heated wash water is used, a lack of heated wash water may occur as an amount of used wash water increases. In the present embodiment, the washing water that heats efficiently and instantaneously can be supplied using the wash water having mixed air therein. When the wash water having mixed air therein is sprayed from the rear spray port 555a to be released into the atmosphere, the bodies of water are pressurized by the expansion of the air in the spray direction. Therefore, using washing water that has mixed air in it improves the sensitivity of the human body to stimuli.

The air pressure is kept substantially constant in this example. This makes it possible to regularly mix the air supplied to the human body wash nozzle 540 in the wash water supplied to the human body wash nozzle 540. This causes the wash water and air to be sprayed regularly in an alternate manner from the human body wash nozzle 540. Using said wash water offers a highly stable washing sensation to the user.

As described above, since the water pressure fluctuates periodically, a time point at which the water pressure is less than the air pressure can be easily generated without increasing the air pressure even when the flow rate of the wash water is high in this example.

When the air pressure is kept substantially constant as in this example, a diaphragm pump is preferably used that includes a large number (three or more, for example) of oscillation members 14e such as the air pump 14. In this case, the greater number of oscillation members 14e allows for a more stable uniform air pressure to be obtained. Instead of the diaphragm pump, an agitation flow pump such as the air pump 14 capable of providing a substantially uniform air pressure can also be used.

(8-b) Second pressure ratio

Figure 20 is a graph showing a second pressure relationship between the water pressure and the air pressure that is maintained when water bodies are sprayed. Also in Figure 20, the ordinate represents the pressure and the abscissa represents time. The dashed line wp indicates the water pressure caused by the water pump 11, and the solid line ap indicates the air pressure caused by the air pump 14.

As shown in Figure 20, the water pressure caused by the water pump 11 fluctuates periodically in a range from a minimum Pc value to a maximum Pd value in this example. Meanwhile, the air pressure caused by the air pump 14 fluctuates periodically in a range from a minimum zero value to a maximum Pe value. The maximum Pe value of the air pressure is higher than the minimum Pc value and lower than the maximum Pd value of the air pressure.

In this case, the air pressure periodically exceeds the water pressure as indicated by the scratch in Figure 20. At this time, the air is periodically mixed in the wash water as split air bubbles. They are comparatively small. Since a large number of air bubbles are mixed during washing, the air bubbles coalesce to become air masses in the linear flow path 551 of Figure 3 in this example. Therefore, when the air masses flow in the linear flow path 551, the air masses substantially occupy the entire cross section of the flow path. Therefore, the wash water in the linear flow path 551 is split by the air masses, and the water masses and the air masses are alternately formed in the linear flow path 551.

These effects become more evident as the frequency of air pressure fluctuations becomes higher than the frequency of water pressure fluctuations. In this case, since the air is mixed more frequently when the water pressure decreases, the flow of mixed air in the wash water can be stabilized even if a frequency deviation occurs between the frequency of air pressure fluctuations. and the frequency of water pressure fluctuations.

The linear flow path 551 is formed such that its cross-sectional area gradually decreases, so that the wash water can be more efficiently split by the air masses in the linear flow path 551. Accordingly, the water masses and air masses reach the rear spray port 555a of Figure 16 to be intermittently sprayed alternately from the rear spray port 555a of Figure 16.

In addition, the second pressure ratio makes it possible to regularly mix the air supplied to the human body wash nozzle 540 in the wash water supplied to the human body wash nozzle 540 with a simpler configuration than when using the First pressure ratio. Therefore, the wash water and air are sprayed regularly from the human body wash nozzle 540 in an alternate manner. As a result, bodies of water separated from the human body wash nozzle 540 are sprayed regularly. Using said wash water offers a highly stable washing sensation to the user. (8-c) Third pressure ratio

Figure 21 is a graph showing a third pressure relationship between water pressure and air pressure that is maintained when water bodies are sprayed. Also in Figure 21, the ordinate represents the pressure and the abscissa represents time. The dashed line wp indicates the water pressure caused by the water pump 11, and the solid line ap indicates the air pressure caused by the air pump 14.

As shown in Figure 21, the water pressure caused by the water pump 11 fluctuates periodically in a range from a minimum Pf value to a maximum Pg value in this example. Meanwhile, the air pressure caused by the air pump 14 fluctuates periodically in a range from a minimum zero value to a maximum Ph value. The maximum pH value of air pressure is higher than the minimum Pf value and lower than the maximum Pg value of the water pressure.

In this case, the air pressure regularly exceeds the water pressure as indicated by the scratch in Figure 21. Therefore, the air is mixed in the wash water in some cases when the pressure of the water, and the air is not mixed in the wash water in other cases when the air pressure decreases. In this case, the number of times of air mixing over a certain period of time varies. This causes the flow of the mixed air in the wash water to fluctuate, and the water masses and air masses form irregularly in the linear flow path 551 of Figure 3.

These effects become more evident as the frequency of air pressure fluctuations is less than the frequency of water pressure fluctuations. In this case, a period can be generated irregularly in which the air is frequently mixed in the wash water and a period in which the air is not mixed in the wash water at all.

Immediately after spraying from the outer spray port 555a, the wash water is in the form of substantially spherical bodies of water due to surface tension. In this case, when water masses and air masses are irregularly formed in the linear flow path 551, the size of the water masses sprayed from the rear spray port 555a also varies irregularly. Using said washing water provides an irregular stimulus caused by the washing water to the user. When the human body receives stimuli of the same type for a long period of time, it ends up getting used to the stimuli. This leads to a lower sensitivity to stimuli. Therefore, a lower sensitivity of the human body to stimuli by irregularly spraying formed water masses and air masses to the human body is suppressed. This offers a more stimulating washing sensation to the user, and relieves the intestines of the user.

The relationship between water pressure and air pressure is established as in this example, so that a sufficient and stable amount of air can be mixed in the wash water and a washing sensation can be provided depending on the user's tastes even when a small air pump 14 is used (figure 3). (8-d) Other examples

(8-d-1) In the embodiment described above, an air adjustment switch for setting the mixed air pressure in the wash water at a plurality of levels can be provided in the remote control device 300 of the figure 2.

In this case, the user can set the air pressure to a plurality of levels by operating the air adjustment switch.

Figure 22 is a graph showing another example of the pressure relationship between water pressure and air pressure that is maintained when water bodies are sprayed. Specifically, the graph shows water pressure fluctuations and air pressure fluctuations when the user changes the setting of the air pressure during the spraying of water masses to an air pressure.

Also in Figure 22, the ordinate represents pressure, and the abscissa represents time. The dashed line wp indicates the water pressure caused by the water pump 11 and the solid line ap indicates the air pressure caused by the air pump 14.

As shown in Figure 22, the water pressure caused by the water pump 11 fluctuates periodically in a range from a minimum zero value to a maximum Pb value in this example. Meanwhile, the air pressure caused by the water pump 14 remains substantially constant at a Pa value that is higher than the minimum null value and lower than the maximum Pb value of the water pressure in a period from one point. of time t0 to a point of time t1. Then, the air pressure is kept substantially constant at a value Pi which is smaller than the value Pa at the time point t1 where the setting of the air pressure is changed by the user and thereafter. In this case, the air is mixed in the wash water at times indicated by the scratch in Figure 22.

The ratio of the Pi value to the Pa value is 0.8 for example. In this case, the amount of air mixed in the wash water at time point t1 and thereafter is smaller than in the period from time point t0 to time point t1. By selecting said air pressure, washing water is offered with a gentle washing sensation, which is achieved by a sufficient flow of washing water and a comparatively small flow of air, to the user.

On the other hand, the user can change the setting of the air pressure to the higher side. For example, the ratio of the Pi value to the Pa value can be set to 1.3 in Figure 22. In this case, the amount of air mixed in the wash water at time point t1 and thereafter exceeds the amount of mixed air in the wash water in the period from time point t0 to time point t1. Selecting said air pressure offers a highly stimulating wash water that is accelerated by the air to the user. In this case, the amount of washing water used is small, therefore, allowing the private parts to dry after use in a short period of time.

(8-d-2) Although the sanitary washing apparatus 100 (Figure 1) has a configuration such that the three flow paths, which are the linear flow path 551 (Figure 3), the spiral flow path 552 ( Figure 3), and the bidet flow path 553 (Figure 3), are included in a human body wash nozzle 540 (Figure 3) in the embodiment described above, the present invention is not limited to this. For example, the sanitary washing apparatus 100 may include a nozzle that includes the linear flow path 551 and the spiral flow path 552 and a nozzle that includes the bidet flow path 553.

In this case, the nozzle that includes the bidet flow path 553, with which women are especially concerned, is accommodated in the sanitary washing apparatus 100 when the user uses the nozzle that includes the linear flow path 551 and the spiral flow path 552. Accordingly, the sanitary washing apparatus 100, which is more sanitary, can be provided.

(8-d-3) Although the water pressure fluctuates in the form of a substantially sinusoidal wave as the example of the water pressure fluctuation in the embodiment described above, the present invention is not limited to this. For example, water pressure can fluctuate in the form of a triangular wave or a rectangular wave. Water pressure may fluctuate not periodically, but irregularly. The amplitude of fluctuations in water pressure may not be constant.

(8-d-4) Although a small piston pump is used as the water pump 11 (Figure 3) in the embodiment described above, the present invention is not limited to this. For example, a plunger pump or a diaphragm pump can be used. A large piston pump can also be used. In this case, the water pump 11 may be provided outside the main body 200 (Figure 1).

The frequency of water pressure fluctuations is determined by a ratio of the flow rate of the wash water supplied by the water pump 11 with respect to an amount of water discharged from the water pump 11. The instant heat type heat exchanger 9 (Figure 3) that instantly heats the wash water is used in the embodiment described above. Therefore, the flow of the wash water supplied to the water pump 11 is 300 to 500 cc / min. Meanwhile, since a space is limited to arrange the used water pump 11, the small water pump 11 capable of discharging 0.15 cc water is used. In this case, the frequency of water pressure fluctuations is 33.3 to 55.6 Hz.

On the other hand, the large piston pump discharges a large amount of water, resulting in a higher frequency of water pressure fluctuations. Accordingly, wash water that includes irregularly formed water masses and air masses can be more easily formed as in the case of using the third pressure ratio.

(8-d-5). The controller 90 (figure 3) controls the water pump 11 (figure 3) and the air pump 14 (figure 3) based on the flow rate measured by the flow sensor 8 (figure 3) to properly set the pressure of water and air pressure in the embodiment described above. A control amount for setting the water pressure and the air pressure differs depending on the shape of the T-tube 503 (Figure 5) in which the wash water and the air come together.

Figures 23 (a), (b), (c), (d) show examples of tube 503 in T.

In the example of Figure 23 (a), an outgoing flow pipe 503c is provided perpendicular to an inlet water flow pipe 503a and an incoming air flow pipe 503b is formed in a linear fashion. The inner diameter of each of the, the incoming water flow pipe 503a, the incoming air flow pipe 503b and the outgoing flow pipe 503c is 2.5 mm, for example.

In the example of Figure 23 (b), the incoming air flow pipe 503b is inclined with respect to the washing water incoming flow pipe 503a and the outgoing flow pipe 503c is formed in a linear fashion. The inner diameter of each of, the incoming water flow pipe 503a and the outgoing flow pipe 503c is 6.0 mm, and the inner diameter of the incoming air flow pipe 503b is 1.0 mm, for example.

In the example of Figure 23 (c), the inlet flow pipe 503a of wash water perpendicular to the inlet flow pipe 503b is provided the outflow pipe 503c which are formed in a linear fashion. The inner diameter of each of the, the incoming water flow pipe 503a, the incoming air flow pipe 503b and the outgoing flow pipe 503c is 6.0 mm, for example, and an ejector 503d is provided having the inner diameter of 1.15 mm, for example, in the tube 503b of incoming air flow.

In the example of Figure 23 (d), the incoming air flow pipe 503b is provided perpendicular to the washing water incoming flow pipe 503a and the outgoing flow pipe 503c are formed in a linear fashion. The inner diameter of each of the, the incoming water flow pipe 503a and the outgoing flow pipe 503c is 6.0 mm, for example, and an ejector having the inner diameter of 1.3 mm is used , for example, as the incoming air flow pipe 503b.

Although the T-tube 503 shown in Figure 23 (a) is used in the embodiment described above, the present invention is not limited to this. The T-tube shown in Figures 23 (b) to (d) can be used depending on the amount of control of the water pump 11 and the air pump 14.

(8-d-6) Although the relationship between the flow rate of the wash water obtained by the flow sensor 8 (Figure 3) and the working ratio of the drive pulse applied to the air pump 14 of Figure 3 is stored previously as the map, and the pressure of the washing water sprayed from the nozzle 540 of human body wash is controlled to the pressure corresponding to the washing intensity that is set by the user by controlling the working ratio of the operating pulse used the map in the embodiment described above, the present invention is not limited to this. For example, the spray pressure from the human body wash nozzle 540 can be controlled to the pressure corresponding to the wash intensity that is set by the user by providing a pressure detector between the T-tube 503 of Figure 5 and the rear spray port 555a, and controlling the water pump 11 of Figure 3 based on the pressure detected by the pressure detector.

(8-d-7) Although the frequency of air pressure fluctuations is controlled to be less than the frequency of water pressure fluctuations in the third pressure ratio, the present invention is not limited to this. For example, at least any of the frequency of water pressure fluctuations and the frequency of air pressure fluctuations can be controlled to fluctuate irregularly.

In this case, the water mass and air masses may be irregularly formed additionally in the linear flow path 551 of Figure 3. Therefore, the sizes of the water bodies sprayed from the spray port 555a of Rear wash water of Figure 16 is additionally irregularly formed. When using such wash water, more irregular stimuli are offered to the users, and the user's intestines are relieved.

(8-d-8) When the water pump 11 is not able to provide the maximum wash intensity that can be set by the user, the pressure of the sprayed water from the human body wash nozzle 540 can be controlled until the portion corresponding to the maximum wash intensity increasing the air pressure caused by the air pump 14.

(9) Correspondences between elements of the claims and parts of the embodiments.

In the following paragraph, non-limiting examples of correspondences between various elements listed in the subsequent claims and those described above with respect to the various preferred embodiments of the present invention are explained.

In the embodiment described above, the water pump 11 is an example of a washing water supply device and a washing water pressurization device, the air pump 14 is an example of an air supply device and of an air pressurization device, the hole 540h is an example of a spray port, the human body wash nozzle 540 is an example of a spray device, the linear flow path 551 is an example of a flow path , the 503 T-tube is a an example of a joint, the remote control device 300 is an example of a drive unit, the flow sensor 8 is an example of a flow detector, and the heat exchanger 9 is an example of an instant heating device.

Like each of the various elements listed in the claims, other various elements having configurations or functions described in the claims can also be used.

Industrial Applicability

The present invention can be used effectively for a sanitary washing apparatus that washes the private parts of a human body.

Claims (8)

1. A sanitary washing apparatus comprising: a washing water supply device (11) that is suitable for supplying washing water at a fluctuating pressure; a device (14) of its air minister that is suitable for supplying air at a fluctuating pressure; and a spray device (540) having a spray port (540c), and is suitable for spraying the water supplied by said washing water supply device (11) and the air supplied by said air device (14) from said spray port (540c) where the pressure of the wash water supplied by said washing water supply device (11) and a pressure of the air supplied by said air supply device (14) are set such that the pressure of the air supplied to said device ( 540) of spraying is greater than the pressure of the washing water supplied to said spraying device at least once in a period in which the washing water is being sprayed from said spraying device (540), characterized in that the pressure of the air supplied to said spray device (540) is set lower than a maximum value of the pressure of the wash water supplied to said spray device (540), said air supply device (14) includes a air pressurization device (14) that is suitable for pressurizing the air at a pressure that fluctuates periodically, said washing water supply device (11) includes a washing water pressurization device (11) that is suitable for pressurizing the washing water supplied from a water supply source at a pressure that fluctuates periodically, and the pressure of the wash water pressurized by said washing water pressurization device (11) and the pressure of the pressurized air by said air pressurization device (14) are set such that a maximum value of the supplied air pressure to said spraying device (540) is greater than a minimum value of the pressure of the washing water supplied to said spraying device (540). 2. The sanitary washing apparatus according to claim 1, wherein the pressure of the wash water pressurized by said washing water pressurization device (11) and the pressure of the pressurized air by said pressure pressurizing device (14) Air are set in such a way that the frequency of fluctuations in the pressure of the air supplied to said spray device (540) is greater than a frequency of fluctuations in the pressure of the wash water supplied to said spray device (540). 3. The sanitary washing apparatus according to claim 1, wherein the pressure of the washing water pressurized by said washing water pressurization device (11) and the pressure of the pressurized air by said pressure pressurizing device (14) air are set in such a way that the frequency of fluctuations in the pressure of the air supplied to said spray device (540) is less than a frequency of fluctuations in the pressure of the wash water supplied to said spray device (540). 4. The sanitary washing apparatus according to claim 1, wherein said spray device (540) also includes a flow path (551) that is suitable for introducing the wash water supplied by said washing water supply device (11) and the air supplied by said supply device (14) of air to said spray port (540), and the pressure of the wash water supplied by said washing water supply device (11) and the pressure of the air supplied by said air supply device (14) are set such that the washing water flowing in said path (551) flow is split by air. 5. The sanitary washing apparatus according to claim 4, further comprising a joint (503) that is suitable for joining the washing water supplied by said washing water supply device (11) and the air supplied by said air supply device (14) for introducing the wash water and air attached to said flow path (551) of said spray device (540). 6. The sanitary washing apparatus according to claim 1, further comprising: a drive unit (300) that is suitable to be operated by a user to establish a wash intensity; Y a controller (90) that is suitable for controlling at least one of said washing water supply device (11) and said air supply device (14) such that the pressure of the washing water sprayed from the device (540) spray reaches a pressure corresponding to the wash intensity set by the drive of said drive unit (300). 7. The sanitary washing apparatus according to claim 6, further comprising a flow detector (8) that is suitable for detecting a flow of the washing water supplied by the washing water supply device (11), in where said controller (90) controls at least one of, said washing water supply device (11) and said air supply device (14) based on the flow rate detected by said detector (8) of the flow rate of such such that the pressure of the washing water sprayed from said spraying device (540) reaches the pressure corresponding to the washing intensity set by the drive of the drive unit (300). The sanitary washing apparatus according to claim 1, further comprising an instantaneous heating device (9) that is suitable for heating the flowing washing water supplied from a supply source (2) to supply the water of heated washing to said washing water supply device (11) in the period in which the washing water is sprayed from said spraying device (540).