Sanitary washing apparatus

1. A sanitary washing apparatus comprising:

a nozzle including a jetting port, a swirling chamber and a protrusion and configured to squirt water from the jetting port and to cause the water to impinge on female private parts,

the nozzle being operable to switch between a first jetting and a second jetting, the first jetting squirting the water from the jetting port to cause the water to impinge on a first range located around a center of the female private parts, and the second jetting squirting the water from the jetting port more diffusively than the first jetting to cause the water to impinge evenly on a second range wider than the first range without moving the jetting port, the second range including the first range,

the swirling chamber being provided below the jetting port and configured to swirl the water,

the protrusion being fixed to a central portion of the swirling chamber and configured to generate a swirling flow,

the water being squirted so that flow velocity in the first range of the first jetting is slower than flow velocity in the second range of the second jetting.

2. The apparatus according to claim 1 , wherein area of the water occupying the jetting port as viewed in jetting direction of the water squirted from the jetting port is made larger in the first jetting than in the second jetting.

3. The apparatus according to claim 1 , wherein

the water is squirted from the swirling chamber with swirling speed of the water in the swirling chamber in the first jetting made slower than in the second jetting.

4. The apparatus according to claim 3 , wherein the nozzle includes a deceleration device configured to make the flow velocity of the water squirted from the jetting port in the first jetting slower than the flow velocity of the water squirted from the jetting port in the second jetting.

5. The apparatus according to claim 4 , wherein the deceleration device includes an air mixing section configured to mix air into the water jetted from the swirling chamber, and

the air mixing section makes mixing amount of air larger in the first jetting than in the second jetting.

6. The apparatus according to claim 5 , wherein

in the first jetting, the water with outer peripheral side of the jetted water being in a granulated state is supplied through the air mixing section to the jetting port, and

in the second jetting, the water with outer peripheral side of the jetted water being in a water film state is supplied through the air mixing section to the jetting port.

7. The apparatus according to claim 1 , further comprising:

a water-pressure modulator configured to provide pulsation to flow of the water,

in the first jetting, the water-pressure modulator being activated to provide pulsation to the flow of the water squirted from the jetting port to continuously change the flow velocity of the water, and in the second jetting, the water being squirted from the jetting port without activating the water-pressure modulator.

8. The apparatus according to claim 1 , wherein the nozzle further includes:

a throttle configured to squirt the water at the jetting port;

a first water supply channel configured to supply the water to the throttle while swirling the water;

a second water supply channel configured to supply the water to the throttle while swirling the water to a degree lower than degree of swirling of the water supplied from the first water supply channel, or without swirling the water; and

a channel selection device configured to supply the water to the second water supply channel when performing the first jetting, and to supply the water to the first water supply channel when performing the second jetting.

9. The apparatus according to claim 1 , wherein

the jetting port includes at least a first jetting port and a second jetting port, and

the first jetting jets water from the first jetting port, and the second jetting jets water from the second jetting port.

10. A sanitary washing apparatus comprising:

a nozzle including a jetting port, a swirling chamber and a protrusion and configured to squirt water from the jetting port and to cause the water to impinge on female private parts,

the nozzle being operable to switch between a first jetting and a second jetting, the first jetting squirting the water from the jetting port to cause the water to impinge on a first range located around a center of the female private parts, and the second jetting squirting the water from the jetting port more diffusively than the first jetting to cause the water to impinge evenly on a second range wider than the first range without moving the jetting port, the second range including the first range,

the swirling chamber being provided below the jetting port and configured to swirl the water,

the protrusion being fixed to a central portion of the swirling chamber and configured to generate a swirling flow,

the nozzle including an impingement force suppression device configured to suppress impingement force in the first range of the first jetting when the second jetting is switched to the first jetting.

11. The apparatus according to claim 10 , wherein when the second jetting is switched to the first jetting, the impingement force suppression device makes flow velocity in the first range of the first jetting slower than flow velocity in the second range of the second jetting to suppress the impingement force in the first range of the first jetting.

12. The apparatus according to claim 10 , wherein the impingement force suppression device squirts the water at a lower flow rate in the first jetting than in the second jetting.

13. The apparatus according to claim 10 , wherein

the first jetting and the second jetting cause the water to be granulated and squirted from the jetting port, and

the impingement force suppression device granulates the water so that particle diameter is smaller in the first jetting than in the second jetting.