Sprayer comprising detection system for early turn off

1 . A sprayer, comprising:

a container, configured to contain a liquid;

a passage, comprising a first opening, a second opening, a resonator and a mesh, wherein when the liquid in the container is passed through the resonator via the first opening, the liquid is emitted as a gas via the second opening;

a first optical sensor, configured to sense first optical data of at least a portion of the mesh or at least a portion of a surface of the container; and

a processing circuit, configured to compute a foaming level of the mesh or of the surface according to the first optical data, and configured to determine whether the resonator should be turned off or not according to the foaming level.

2 . The sprayer of claim 1 , wherein the first optical data is at least one sensing image, and the processing circuit computes the foaming level according to bright information of the sensing image.

3 . The sprayer of claim 1 , further comprising:

at least one electrode, disposed to the mesh;

wherein the processing circuit further determines whether the electrode is conductive or not;

wherein if the processing circuit determines that the electrode is conductive and the foaming level is lower than a first level threshold, the processing circuit does not turn off the resonator.

4 . The sprayer of claim 1 , further comprising:

at least one electrode, separately disposed to the mesh;

wherein the processing circuit further determines whether the electrode is conductive or not;

wherein if the processing circuit determines that the electrode is conductive and the foaming level is higher than a second level threshold, the processing circuit turns off the resonator.

5 . The sprayer of claim 1 , further comprising:

a detection device, disposed outside of the passage and comprising:

a light source, configured to emit light through a transparent window of the passage for illuminating the gas in the passage such that the gas reflects the emitted light to generate reflected light; and

a second optical sensor, configured to detect second optical data generated according to the reflected light;

wherein the processing circuit does not turn off the resonator if brightness information of the second optical data is lower than a first threshold and the foaming level is lower than a third level threshold.

6 . The sprayer of claim 1 , further comprising:

a detection device, disposed outside of the passage and comprising:

a light source, configured to emit light through a transparent window of the passage for illuminating the gas in the passage such that the gas reflects the emitted light to generate reflected light; and

a second optical sensor, configured to detect second optical data generated according to the reflected light;

wherein the processing circuit turns off the resonator if the brightness information of the second optical data is lower than a first threshold and the foaming level is higher than a forth level threshold.

7 . The sprayer of claim 1 , wherein the first opening is in a first surface of the container and the first optical sensor is disposed to a second surface of the container, wherein the second surface is opposite to the first surface.

8 . The sprayer of claim 1 , wherein the first opening is in a first surface of the container and the first optical sensor is disposed to a third surface of the container, wherein the third surface is non-parallel with the first surface.

9 . The sprayer of claim 1 ,

wherein the container comprises a first surface, a second surface and a third surface;

wherein the first opening is in the first surface, and the second surface is opposite to the first surface;

wherein the third surface is connected between the first surface and the second surface, and forms a corner with the second surface;

wherein the first optical sensor is disposed to the corner.

10 . The sprayer of claim 1 , wherein the first optical sensor is in the passage.

11 . A sprayer, comprising:

a container, configured to contain a liquid;

a passage, comprising, a first opening, a second opening, a mesh and a resonator, wherein when the liquid in the container is passed through the resonator via the first opening, the liquid is emitted as a gas via the second opening;

a first optical sensor, configured to sense first optical data of at least a portion of the mesh in the first opening or at least a portion a surface of the container; and

a processing circuit, configured to estimate a liquid level of the liquid according to the first optical data.

12 . The sprayer of claim 10 , wherein the first optical data is at least one sensing image, and the processing circuit estimates the liquid level according to bright information or a brightness level of the sensing image.

13 . The sprayer of claim 11 , further comprising:

at least one electrode, disposed to the mesh;

wherein the processing circuit further determines whether the electrode is conductive or not;

wherein if the processing circuit determines that the electrode is conductive and the foaming level is lower than a first level threshold, the processing circuit estimates the liquid level is high.

14 . The sprayer of claim 11 , further comprising:

at least one electrode, separately disposed to the mesh;

wherein the processing circuit further determines whether the electrode is conductive or not;

wherein if the processing circuit determines that the electrode is conductive and the foaming level is higher than a second level threshold, the processing circuit estimates the liquid level is low.

15 . The sprayer of claim 11 , further comprising:

a detection device, disposed outside of the passage and comprising:

a light source, configured to emit light through a transparent window of the passage for illuminating the gas in the passage such that the gas reflects the emitted light to generate reflected light; and

a second optical sensor, configured to detect second optical data generated according to the reflected light;

wherein the processing circuit, the processing circuit estimates the liquid level is high if brightness information of the second optical data is lower than a first threshold and the foaming level is lower than a third level threshold.

16 . The sprayer of claim 11 , further comprising:

a detection device, disposed outside of the passage and comprising:

a light source, configured to emit light through a transparent window of the passage for illuminating the gas in the passage such that the gas reflects the emitted light to generate reflected light; and

a second optical sensor, configured to detect second optical data generated according to the reflected light;

wherein the processing circuit, the processing circuit estimates the liquid level is low if the brightness information of the second optical data is lower than a first threshold and the foaming level is higher than a forth level threshold.

17 . The sprayer of claim 11 , wherein the first opening is in a first surface of the container and the first optical sensor is disposed to a second surface of the container, wherein the second surface is opposite to the first surface.

18 . The sprayer of claim 11 , wherein the first opening is in a first surface of the container and the first optical sensor is disposed to a third surface of the container, wherein the third surface is non-parallel with the first surface.

19 . The sprayer of claim 11 ,

wherein the container comprises a first surface, a second surface and a third surface;

wherein the first opening is in the first surface, and the second surface is opposite to the first surface;

wherein the third surface is connected between the first surface and the second surface, and forms a corner with the second surface;

wherein the first optical sensor is disposed to the corner.

20 . The sprayer of claim 11 , wherein the first optical sensor is in the passage.