Real-time cooking fume concentration monitoring system and range hood applying the same
A real-time fume concentration monitoring system includes an electrical box having a closed internal space, wherein a divider is disposed within the electrical box so that the internal space of the electrical box is divided into a first chamber and a second chamber; a signal emitting unit is disposed within the first chamber, and a signal receiving unit is disposed within the second chamber; a portion of the electrical box corresponding to a signal emitting portion of the signal emitting unit and signal receiving unit is a light-transmitting region; a signal output terminal of the signal receiving unit is connected to a data processing unit. By detecting the fume concentration in a contactless manner, power consumption is low, the energy efficiency demand for the whole machine in the standby state is satisfied, and the signal detection sensitivity is high.
1. A real-time fume concentration monitoring system, comprising an electrical box having a closed internal space,
wherein
a divider is disposed within the electrical box so that the internal space of the electrical box is divided into a first chamber and a second chamber, the first chamber does not communicate with the second chamber;
a signal emitting unit for emitting a pulse light signal is disposed within the first chamber, and at least a portion of the electrical box corresponding to a signal emitting portion of the signal emitting unit is a light-transmitting region;
a signal receiving unit for receiving the pulse light signal emitted by the signal emitting unit is disposed within the second chamber, and at least a portion of the electrical box corresponding to a signal receiving portion of the signal receiving unit is a light-transmitting region;
a signal output terminal of the signal receiving unit is connected to a data processing unit capable of converting the pulse light signal received by the signal receiving unit into a fume concentration signal according to an intensity of the pulse light signal received; and
an L-shaped shutter is disposed within the second chamber to form a dark region within the second chamber, and a pulse light signal compensation unit is disposed within the dark region.
2. The system of claim 1 , wherein a non-reflective coating incapable of reflecting the pulse light signal emitted by the signal emitting unit is applied onto both sides of the divider.
3. The system of claim 1 , wherein
the electrical box further comprises a box body having an opening and a transparent cover plate covering the opening of the box body;
a non-reflective coating incapable of reflecting the pulse light signal emitted by the signal emitting unit is applied onto an inner wall of the box body;
a first light-transmitting region fitted within the transparent cover plate that covers the first chamber and corresponds to the signal emitting unit;
a second light-transmitting region fitted within the transparent cover plate that covers the second chamber and corresponds to the signal receiving unit; and,
the non-reflective coating incapable of reflecting the pulse light signal emitted by the signal emitting unit is applied to the entire transparent cover plate except for the first light-transmitting region and the second light-transmitting region.
4. The system of claim 3 , wherein
the transparent cover plate has a thickness that is less than or equal to 8 mm, and each of the first light-transmitting region and the second light-transmitting region has a diameter that is between 5 mm to 15 mm;
the signal emitting unit is located in an axial center of the first light-transmitting region, and the signal receiving unit is located in an axial center of the second light-transmitting region.
5. The system of claim 1 , wherein the first light-transmitting region further comprises a lens and the second light-transmitting region further comprises a lens.
6. The system of claim 1 , wherein
the data processing unit is disposed within the second chamber; and,
the electric box further comprises a through hole for a signal cable to pass through, the signal cable is connected to the data processing unit.
7. The system of claim 1 , wherein both the pulse light signal emitted by the signal emitting unit and a pulse light signal emitted by the pulse light signal compensation unit are invisible light signals.