Particulate matter sensor capable of resisting oil smoke pollution

Abstract

The utility model relates to the technical field of sensors, and discloses a particulate matter sensor capable of resisting oil smoke pollution, which comprises a front flow channel packaging shell, a PCBA packaging shell, a PCBA, a photoelectric detector, a light emitting component, a fan and a frame, a flow channel rib plate is arranged on the frame, and the flow channel rib plate is matched with the front flow channel packaging shell to form a gas flow channel. The gas flow channel comprises a gas inlet flow channel, a middle flow channel and an exhaust flow channel; the end, communicated with the air inlet flow channel, of the middle flow channel is higher than the end, communicated with the exhaust flow channel, of the middle flow channel. According to the utility model, oil smoke is effectively sealed and isolated through the arranged gas flow channel, so that the reliability of long-term operation of the sensor in a kitchen environment is improved; meanwhile, the problem that the sensor fails due to the fact that accumulated oil cannot be discharged is solved through the arranged gas flow channel; by arranging the cutting part, sucked oil smoke particles can be cut, large-diameter oil smoke particles are prevented from being deposited in a detection area, interference of deposited oil smoke on detection operation is reduced, and the later maintenance frequency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a particle sensor which is resistant to oil smoke pollution. Background Art

[0002] As consumers continue to pay attention to air quality, the problem of kitchen fume pollution has become increasingly important. In order to reflect the smoke control ability of kitchen appliances and realize the intelligent management of kitchen environment, a particle sensor specifically for kitchen fume environment is needed to monitor the kitchen air quality in real time.

[0003] Existing particle sensors use the principle of light scattering, and the components are combined in a certain way to realize the conversion and calculation of particle optical signals into electrical signals; the sensor components include optical components, fans, PCBA, plastic (or metal) structural parts, etc. For example, a laser air particle sensor with announcement number CN208399327U has the advantages of small sampling signal interference, high accuracy, and long service life; however, this sensor, like most existing particle sensors, is used indoors (living room, bedroom, office, etc.), and its application environment is the atmospheric environment. However, particle sensors used in kitchens, due to the presence of oil smoke in the kitchen, the accumulation of oil smoke or the erosion of PCBA often affects the operation of the sensor. Utility Model Content

[0004] The utility model aims to provide a particle sensor resistant to oil fume pollution, so as to solve the problems of oil fume erosion on PCBA or oil fume accumulation in the sensor and inability to be discharged when the existing sensor is used in an oil fume environment.

[0005] The utility model is realized by the following technical scheme: a particle sensor resistant to oil smoke pollution, comprising a front flow channel packaging shell, a PCBA packaging shell, a PCBA, a photoelectric detector, a light emitting component, a fan, and a frame, wherein the photoelectric detector is mounted on the PCBA, the PCBA, the light emitting component, and the fan are mounted on the frame, the front flow channel packaging shell and the PCBA packaging shell are used to package the frame, a flow channel rib plate is arranged on the frame, when the front flow channel packaging shell is combined with the frame, the flow channel rib plate cooperates with the front flow channel packaging shell to form a gas flow channel, a through hole is opened on the flow channel rib plate, and the light emitting component is mounted on the fan. The light beam of the light emitting component will cross the gas flow channel through the through hole, and the detection direction of the photoelectric detector, the light beam direction of the light emitting component, and the air flow direction in the intake flow channel are perpendicular to each other to form a detection area, and the gas flow channel includes an intake flow channel, an intermediate flow channel, and an exhaust flow channel; the detection area is in the intake flow channel, and the fan is on the exhaust flow channel; one end of the intermediate flow channel is connected to the intake flow channel, and the other end is connected to the exhaust flow channel; the end of the intermediate flow channel connected to the intake flow channel is higher than the end connected to the exhaust flow channel; the frame is provided with an oil collecting tank at the fan.

[0006] In order to better realize the utility model, further, an air intake guide port is provided on the frame, and an air intake reserved port is provided on the PCBA packaging shell. When the PCBA packaging shell is installed on the frame, the air intake reserved port cooperates with the air intake guide port; an exhaust reserved port is provided on the PCBA packaging shell, and the exhaust reserved port is located at the end of the exhaust flow channel.

[0007] In order to better implement the utility model, further, a cutting portion is provided on the frame, and the cutting portion is located on the intake air passage. When the oil fume particles are inhaled, they first pass through the cutting portion and then flow to the detection area.

[0008] In order to better realize the utility model, further, the cutting part is composed of a plurality of cutting columns, and the plurality of cutting columns are arrayed and staggeredly distributed.

[0009] In order to better realize the utility model, further, the cutting column is cylindrical.

[0010] In order to better implement the utility model, further, a plurality of mounting ears are provided on the frame, and the mounting ears are located at the corners of the frame.

[0011] In order to better implement the present invention, further, the frame is respectively connected to the front flow channel packaging shell and the PCBA packaging shell through buckles.

[0012] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0013] (1) The utility model effectively seals and isolates the oil smoke by setting up a gas flow channel, so that the oil smoke has no chance to contact the PCBA after entering the sensor until it is discharged, that is, through spatial isolation, the reliability of the sensor in the long-term operation in the kitchen environment is improved; at the same time, through the longitudinally arranged intake flow channel, exhaust flow channel and inclined intermediate flow channel, the oil accumulated in the gas flow channel can be naturally discharged under the action of gravity and collected by the oil collecting tank, avoiding the problem of sensor failure due to the inability to discharge the accumulated oil;

[0014] (2) The utility model is capable of cutting the inhaled oil fume particles by providing a cutting portion, thereby preventing large-diameter oil fume particles from being deposited in the detection area, reducing the interference of the deposited oil fume on the detection operation, and reducing the frequency of subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is an exploded view of the overall structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0018] Figure 4 It is a schematic diagram of the framework structure.

[0019] Figure 5 This is the schematic diagram of the column cutting operation.

[0020] Among them: 11-intake flow channel; 12-middle flow channel; 13-exhaust flow channel; 101-front flow channel packaging shell; 102-PCBA packaging shell; 103-mounting ear; 104-intake reserved port; 105-exhaust reserved port; 106-PCBA; 107-photoelectric detector; 108-light emitting component; 109-fan; 110-frame; 111-flow channel rib plate; 112-cutting column; 113-detection area; 114-oil collecting tank; 115-intake guide port; 116-oil smoke particles. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiment 1:

[0024] This embodiment provides a particle sensor that is resistant to oil smoke pollution, specifically, Figure 1-Figure 3 As shown, it includes a front flow channel packaging shell 101, a PCBA packaging shell 102, a PCBA 106, a photoelectric detector 107, a light emitting component 108, a fan 109, and a frame 110. The photoelectric detector 107 is installed on the PCBA 106, and the PCBA 106, the light emitting component 108, and the fan 109 are installed on the frame 110. The front flow channel packaging shell 101 and the PCBA packaging shell 102 are used to package the frame 110. The frame 110 is provided with a flow channel rib plate 111. When the front flow channel packaging shell 101 is combined with the frame 110, the flow channel rib plate 111 cooperates with the front flow channel packaging shell 101 to form a gas flow channel. The flow channel rib plate 111 is provided with a through hole. The light emitting component 10 8 will cross the gas flow channel through the through hole, the detection direction of the photodetector 107, the light beam direction of the light emitting assembly 108, and the air flow direction in the inlet flow channel 11 are mutually perpendicular to form a detection area 113, and the gas flow channel includes the inlet flow channel 11, the intermediate flow channel 12, and the exhaust flow channel 13; the detection area 113 is in the inlet flow channel 11, and the fan 109 is on the exhaust flow channel 13; one end of the intermediate flow channel 12 is connected to the inlet flow channel 11, and the other end is connected to the exhaust flow channel 13; the end of the intermediate flow channel 12 connected to the inlet flow channel 11 is higher than the end connected to the exhaust flow channel 13; the frame 110 is provided with an oil collecting tank 114 at the fan 109. The PCBA 106, the light emitting assembly 108, and the photodetector 107 are all commercially available products, and their working principles can be easily understood by those skilled in the art; and this point is not an improvement point of the utility model, and will not be repeated here.

[0025] When the sensor is used, as the fan 109 rotates, the oil smoke starts to be sucked in from the end of the inlet flow channel 11, and then passes through the detection area 113. The light beam of the light emitting component 108 generates scattered light when irradiating the oil smoke, which is received by the photoelectric detector 107 and completed with photoelectric conversion to obtain specific data. Then the oil smoke leaves the inlet flow channel 11, enters the middle flow channel 12, and then enters the exhaust flow channel 13, and then is discharged from the end of the exhaust flow channel 13.

[0026] The oil smoke is effectively sealed and isolated by the arranged gas flow channel, so that the oil smoke has no chance to contact the PCBA106 after entering the sensor until it is discharged, that is, the reliability of the long-term operation of the sensor in the kitchen environment is improved through spatial isolation; at the same time, through the longitudinally arranged intake flow channel 11, the exhaust flow channel 13 and the inclined intermediate flow channel 12, the oil accumulated in the gas flow channel can be naturally discharged under the action of gravity and collected by the oil collecting tank 114, thereby avoiding the problem of sensor failure due to the inability to discharge the accumulated oil.

[0027] Embodiment 2:

[0028] This embodiment is further expanded on the basis of the above embodiment. Figure 2 , Figure 4 As shown, the frame 110 is provided with an air inlet guide port 115, and the PCBA packaging shell 102 is provided with an air inlet reserved port 104. When the PCBA packaging shell 102 is installed on the frame 110, the air inlet reserved port 104 cooperates with the air inlet guide port 115; the PCBA packaging shell 102 is provided with an exhaust reserved port 105, and the exhaust reserved port 105 is located at the end of the exhaust flow channel 13.

[0029] By placing the air inlet and the air outlet perpendicular to the inlet flow channel 11 and the exhaust flow channel 13 respectively, the air inlet and the outlet are not overlapped with the oil dripping direction, and the fan 109 is conveniently installed to reduce the volume of the entire sensor.

[0030] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0031] Embodiment 3:

[0032] This embodiment is further expanded on the basis of the above embodiment. Figure 3 , Figure 5 As shown, the frame 110 is provided with a cutting part, and the cutting part is located on the inlet air channel 11. When the oil smoke particles 116 are inhaled, they first pass through the cutting part and then flow to the detection area 113. The cutting part is composed of a plurality of cutting columns 112, and the plurality of cutting columns 112 are arrayed and staggered. Preferably, the cutting column 112 is cylindrical.

[0033] After the oil smoke enters the intake air duct 11, the oil smoke particles 116 collide with the cutting column 112 by inertia, so that the oil smoke particles 116 are split into multiple pieces, reducing the diameter of the oil smoke particles 116, thereby reducing the interference degree of oil deposited in the detection area 113 on the detection operation and reducing the frequency of subsequent maintenance.

[0034] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0035] Embodiment 4:

[0036] This embodiment is further expanded on the basis of the above embodiment. Figure 1-Figure 4 As shown, the frame 110 is provided with a plurality of mounting ears 103, and the mounting ears 103 are located at the corners of the frame 110. The frame 110 is respectively connected to the front flow channel packaging shell 101 and the PCBA packaging shell 102 through buckles.

[0037] The diagonally arranged mounting ears 103 can avoid the internal parts position and facilitate the installation of the sensor to the preset point; and the front flow channel packaging shell 101, PCBA packaging shell 102, and frame 110 with snap-on design are for more convenient disassembly and assembly of the sensor.

[0038] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A particle sensor for resisting oil smoke pollution, comprising a front flow channel packaging shell (101), a PCBA packaging shell (102), a PCBA (106), a photoelectric detector (107), a light emitting component (108), a fan (109), and a frame (110), wherein the photoelectric detector (107) is mounted on the PCBA (106), the PCBA (106), the light emitting component (108), and the fan (109) are mounted on the frame (110), and the front flow channel The packaging shell (101) and the PCBA packaging shell (102) are used to package the frame (110); a flow channel rib plate (111) is provided on the frame (110); when the front flow channel packaging shell (101) is combined with the frame (110), the flow channel rib plate (111) cooperates with the front flow channel packaging shell (101) to form a gas flow channel; a through hole is provided on the flow channel rib plate (111); a light beam of the light emitting component (108) will pass through the through hole and cross the gas flow channel; the characteristics are: The gas flow channel comprises an intake flow channel (11), an intermediate flow channel (12), and an exhaust flow channel (13); the detection direction of the photoelectric detector (107), the light beam direction of the light emitting component (108), and the air flow direction in the intake flow channel (11) are mutually perpendicular to form a detection area (113); the detection area (113) is located in the intake flow channel (11), and the fan (109) is located on the exhaust flow channel (13); one end of the intermediate flow channel (12) is connected to the intake flow channel (11), and the other end is connected to the exhaust flow channel (13); the end of the intermediate flow channel (12) connected to the intake flow channel (11) is higher than the end of the intermediate flow channel (12) connected to the exhaust flow channel (13); and the frame (110) is provided with an oil collecting tank (114) at the fan (109).

2. The particle sensor resistant to oil smoke pollution according to claim 1, characterized in that: The frame (110) is provided with an air intake guide port (115), and the PCBA package shell (102) is provided with an air intake reserved port (104); when the PCBA package shell (102) is mounted on the frame (110), the air intake reserved port (104) cooperates with the air intake guide port (115); the PCBA package shell (102) is provided with an exhaust reserved port (105), and the exhaust reserved port (105) is located at the end of the exhaust flow channel (13).

3. The particle sensor resistant to oil smoke pollution according to claim 1, characterized in that: The frame (110) is provided with a cutting portion, the cutting portion being located on the intake air passage (11); when the oil smoke particles (116) are inhaled, they first pass through the cutting portion and then flow to the detection area (113).

4. The particle sensor resistant to oil smoke pollution according to claim 3 is characterized by: The cutting portion is composed of a plurality of cutting columns (112), and the plurality of cutting columns (112) are arranged in an array and staggered.

5. The particle sensor resistant to oil smoke pollution according to claim 4, characterized in that: The cutting column (112) is cylindrical.

6. The particle sensor resistant to oil smoke pollution according to claim 1, characterized in that: The frame (110) is provided with a plurality of mounting ears (103), and the mounting ears (103) are located at corners of the frame (110).

7. The particle sensor resistant to oil smoke pollution according to claim 1, characterized in that: The frame (110) is respectively connected to the front flow channel packaging shell (101) and the PCBA packaging shell (102) through snap fastening.

Images