Dynamic blowing and sucking type oil smoke exhaust device

Abstract

The utility model discloses a dynamic blowing and sucking type oil smoke exhaust device which comprises an air curtain air supply mechanism, a cambered surface type smoke exhaust hood and a cooking bench, a heating area is arranged at the top of the cooking bench; the cambered surface type exhaust hood is arranged behind the cooking bench; the air curtain air supply mechanism comprises an air blower, a flexible gradually-expanding air supply pipe and a strip-shaped air opening, the two ends of the flexible gradually-expanding air supply pipe are connected with the air blower and the strip-shaped air opening respectively, and the strip-shaped air opening is located in front of the cooking bench and faces the cambered surface type exhaust hood. A wrapping area is formed in a lampblack generation area, lampblack diffusion is prevented, and the lampblack trapping rate is improved.

Description

Technical Field

[0001] This utility model belongs to the field of oil fume exhaust systems and relates to a dynamic blowing and suction type oil fume exhaust device. Background Technology

[0002] In existing commercial kitchen exhaust systems, the most common method is the direct extraction system. While this system is effective in some situations, its direct extraction method often leads to oil fume leakage, especially in kitchen environments with high oil fume concentrations. The oil fumes easily spread to the kitchen work area, where they are inhaled in large quantities by chefs, increasing their health burden. Furthermore, the oil fumes drift into the dining area, affecting diners' dining experience. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dynamic blowing and suction type oil fume exhaust device that forms an enveloping area in the oil fume generation area to prevent the oil fume from spreading and improve the oil fume capture rate.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A dynamic blowing and suction type oil fume exhaust device includes an air curtain air supply mechanism, an arc-shaped exhaust hood, and a stove;

[0006] The stovetop has a heating area at the top, and the curved exhaust hood is located at the rear of the stovetop.

[0007] The air curtain air supply mechanism includes a blower, a flexible gradually expanding air supply duct, and strip air outlets. The two ends of the flexible gradually expanding air supply duct are connected to the blower and the strip air outlets, respectively. The strip air outlets are located in front of the stove and face the curved exhaust hood.

[0008] Preferably, the bottom end of the flexible gradually expanding air supply duct is a circular port, which is connected to the circular air outlet of the blower. The size of the flexible gradually expanding air supply duct gradually increases from the bottom end to the top end. The top end of the flexible gradually expanding air supply duct is a long strip port, which is connected to a strip air outlet.

[0009] Preferably, the height of the strip air vent is higher than the height of the heating zone.

[0010] Preferably, the blower is located outdoors.

[0011] Preferably, an adjustable air vent device is provided between the strip air vent and the stove. The adjustable air vent device includes a servo motor, a lead screw, and a rotating plate. The servo motor is set on the stove and faces the strip air vent. The output end of the servo motor is connected to the lead screw, and a connecting plate is threaded onto the lead screw. The end of the rotating plate is connected to the front end of the strip air vent. The two sides of the strip air vent are rotatably connected to the stove. The front end of the rotating plate is provided with an elongated hole, which is slidably connected to the connecting plate.

[0012] Preferably, the strip air outlet is provided with a sliding plate, which includes a strip plate and a sliding groove. The sliding groove is located at both ends of the strip plate, the strip plate covers the strip air outlet, and the sliding groove is slidably connected to the side of the strip air outlet.

[0013] Preferably, the arc-shaped exhaust hood includes an arc-shaped side-suction grille and side baffles, with the side baffles positioned on both sides of the stovetop.

[0014] Preferably, the top of the arc-shaped side-suction grille is provided with a smoke outlet, which is connected to the smoke inlet of a tapered oil fume collector. The smoke outlet of the tapered oil fume collector is connected to an exhaust pipe, which is connected to a centrifugal fan.

[0015] Preferably, the flexible, gradually expanding air supply duct is made of flexible canvas.

[0016] Preferably, it also includes at least one sensor, which is selected from at least one of the following: oil fume concentration sensor, temperature sensor, humidity sensor, wind speed sensor, negative pressure sensor, CO2 sensor, and air quality sensor.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention employs a design combining curved side suction and a front-blowing air curtain to create an enveloping zone in the area where oil fumes are generated, preventing their spread and improving fume capture efficiency. The curved side suction device effectively guides the flow of oil fumes, allowing them to enter the exhaust system more quickly and preventing them from lingering in the kitchen environment. The air curtain isolates the fumes, preventing them from easily spreading to the kitchen work area, reducing the chances of chefs inhaling fumes and contributing to health protection. It also reduces the probability of oil fumes adhering to kitchen equipment and walls, decreasing cleaning and maintenance costs.

[0019] Furthermore, the air curtain's air supply mechanism is adjustable in angle and air outlet width to cope with different oil fume conditions.

[0020] Furthermore, the blower is located outdoors to supply air into the kitchen from the outside, reducing the exhaust of kitchen air, thereby reducing air conditioning energy consumption, improving energy efficiency, avoiding excessive negative pressure environment in the kitchen, reducing dependence on external air, and lowering the operating cost of the air conditioning system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the dynamic blowing and suction type oil fume exhaust device of this utility model;

[0022] Figure 2 This is a schematic diagram of the air curtain air supply mechanism of this utility model;

[0023] Figure 3 This is a schematic diagram of the flexible, gradually expanding air supply duct structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the dynamic adjustment device of this utility model;

[0025] Figure 5 This is a schematic diagram of the servo motor, nut, lead screw, and rotating plate structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the slider structure of this utility model;

[0027] Figure 7 This is a schematic diagram of the arc-shaped smoke hood structure of this utility model.

[0028] The components are: 1-Air curtain air supply mechanism; 2-Adjustable air outlet device; 3-Curved surface smoke hood; 4-Gradually narrowing flexible exhaust duct; 5-Oil fume exhaust duct; 6-Centrifugal fan; 7-Central control panel computer; 8-Controller; 9-Heating area; 10-Blower; 11-Flexible gradually expanding air supply duct; 12-Strip air outlet; 13-Circular port; 14-Canvas pipe; 15-Port; 16-Steering motor; 17-Screw rod; 18-Rotating plate; 19-Nut; 20-Sliding vane; 21-Strip plate; 22-Slide groove; 23-Gradually narrowing oil fume collector; 24-Curved surface side-suction grille; 25-Side baffle. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terms “installation,” “connection,” and “linkage” should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; a mechanical connection, an electrical connection, or a connection that allows communication; a direct connection or an indirect connection via an intermediate medium; or a connection within two elements or an interaction between two elements. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0034] like Figure 1 As shown, the dynamic blowing and suction type oil fume exhaust device of this utility model includes an air curtain air supply mechanism 1, an adjustable air outlet device 2, an arc-shaped smoke exhaust hood 3, a gradually narrowing flexible exhaust pipe 4, a centrifugal fan 6, a central control console computer 7, and a controller 8.

[0035] Figure 2The specific structure and layout of the air curtain air supply mechanism 1 are shown. It mainly consists of a blower 10 and a flexible, gradually expanding air supply duct 11. Placing the air curtain air supply mechanism 1 below the stove, supplying air from bottom to top, better conforms to the principles of fluid mechanics and reduces pressure loss. Secondly, placing the air curtain air supply mechanism 1 below the stove facilitates the arrangement of the flexible, gradually expanding air supply duct 11, allowing it to be arranged within a limited space. The bottom end of the flexible, gradually expanding air supply duct 11 has a circular port 13, which connects to the circular air outlet of the blower 10. The size of the flexible, gradually expanding air supply duct 11 gradually increases from the bottom to the top, with a long strip-shaped port 15 at the top, which connects to a strip-shaped air outlet 12. The flexible, gradually expanding air supply duct 11 gradually transitions from a circular shape to a slit shape in the middle section. The geometric structure of the flexible, gradually expanding air supply duct 11 is arc-shaped, conforming to the principle of reducing pressure loss in fluid mechanics. Therefore, the air supplied by the blower 10 can be converted into a strip-shaped air curtain. Blower 10 can be installed outdoors to supply air into the kitchen from the outside, reducing the exhaust of kitchen air and thus reducing air conditioning energy consumption and improving energy efficiency. It also reduces negative pressure: the air curtain's supply air function prevents excessive negative pressure in the kitchen, reducing dependence on external air and lowering the operating costs of the air conditioning system.

[0036] Figure 2 The gas stove or electric hot pot is placed in the heating area 9 on top of the stove. An arc-shaped exhaust hood 3 is installed behind the stove, and an air curtain ventilation mechanism 1 is installed in front. The strip-shaped air vent 12 faces the arc-shaped exhaust hood 3. The height of the heating area 9 is lower than the height of the strip-shaped air vent 12, so that the oil fumes generated by the kitchen utensils in the heating area 9 are wrapped in the air curtain and negative pressure area, which enhances the oil fume removal effect, and the flame of the gas stove is not affected by the air curtain.

[0037] like Figure 3 As shown, this is the design drawing of the flexible gradually expanding air supply duct 11. The circular port 13 is used to connect the blower, and the long strip port 15 is used to connect the strip air outlet 12. The two ports are connected by a flexible canvas 14. The flexible canvas duct 14 gradually changes from a circular shape to a rectangle, and the arc-shaped gradual change reduces the pressure loss during fluid transportation.

[0038] like Figure 4The diagram shows the design of the adjustable air vent device 2 for the strip-shaped air vent 12. Its main functions are to adjust the angle θ (hereinafter referred to as "air vent angle") between the air vent direction and the horizontal plane of the air curtain air supply mechanism 1, and the air vent width B. The air vent angle is adjusted primarily through a combination of a servo motor 16, a nut 19, a lead screw 17, and a rotating plate 18. The servo motor 16 is mounted on the stovetop, facing the strip-shaped air vent 12. The output end of the servo motor 16 is connected to the lead screw 17, which is threaded onto a connecting plate. The end of the rotating plate 18 is connected to the front end of the strip-shaped air vent 12. Both sides of the strip-shaped air vent 12 are rotatably connected to the stovetop. The front end of the rotating plate 18 has an elongated hole that is slidably connected to the connecting plate.

[0039] When the servo motor 16 rotates in the forward direction, it drives the lead screw 17 to rotate. Since the servo motor 16 and the lead screw 17 are fixed, the connecting plate on the lead screw 17 will move upward under the action of the servo motor 16. This displacement drives the strip-shaped air vent 12 to rotate through the rotating plate 18. The same principle applies when the servo motor 16 rotates in the reverse direction, thereby achieving the purpose of adjusting the angle of the strip-shaped air vent 12. The width of the air vent is adjusted by sliding the slider 20 up and down. Figure 5 The design diagrams of the servo motor 16, nut 19, lead screw 17, and rotating plate mechanism 18 are shown. The servo motor 16 uses a stepper motor, which can achieve precise step distances, and the corresponding air curtain angle conversion can reach the 0.1 degree level. Nut 19 is combined with lead screw 17 and rotating plate mechanism 18. When the servo motor 16 drives the lead screw 17 to rotate, and since the servo motor 16 and lead screw 17 are fixed, the reaction force of lead screw 17 drives the rotating plate 18 to rotate, thereby driving the strip air outlet 12 to rotate.

[0040] Figure 6 The specific structure of the sliding plate 20 for adjusting the width of the air vent is shown. The sliding plate 20 includes a strip plate 21 and a sliding groove 22. The strip plate 21 is 160cm long and 10cm wide. The strip plate 21 covers the strip air vent 12 and can adjust the width of the strip air vent 12 within a range of 5~10cm. The sliding groove 22 is located at both ends of the strip plate 21 and is slidably connected to the side of the strip air vent 12. During the adjustment process, the strip plate 21 can move up and down along the sliding groove 22 to adjust the width of the strip air vent 12. Finally, the strip plate 21 is fixed by bolts passing through the sliding groove 22.

[0041] like Figure 7As shown, the arc-shaped exhaust hood 3 includes an arc-shaped side-suction grille 24, with side baffles 25 on both sides of the arc-shaped side-suction grille 24 and a rectangular smoke outlet at the top. The side baffles 25 are mainly used to block the oil fumes on both sides of the stove and prevent them from escaping to the sides. The side baffles 25 adopt an arc-shaped structure, gradually transitioning from the stove surface to the top of the arc-shaped exhaust hood 3. The arc-shaped structure increases the side blocking area, which is more effective than the blocking effect of a straight transition. It not only blocks the outward diffusion of oil fumes, but also reduces the impact of side air intake into the stove on the air curtain. The arc-shaped structure also has a better aesthetic effect.

[0042] The curved side-suction grille 24 increases the area of ​​the fume-capturing surface in a limited space, which is beneficial for the absorption and emission of fumes, while also reducing the height of the range hood and minimizing the free diffusion and upward escape of the hot plume of fumes. The tapered fume collector 23 connects the exhaust port at the top of the curved side-suction grille 24 to the exhaust pipe 5. The bottom of the tapered fume collector 23 has a rectangular connection, gradually transitioning to a circular vent, from which the fumes are discharged outdoors through the exhaust pipe 5. Because the tapered fume collector 23 comes into contact with a mixture of fumes and air, it needs to be made of high-temperature resistant, fume-proof, and corrosion-resistant materials. It is recommended to use a PVC flexible hose for the tapered fume collector 23, while the curved side-suction grille 24 is recommended to be made of magnesium stainless steel. The exhaust pipe 5, typically made of aluminum foil flexible hose, is connected to the rear end of the tapered fume collector 23, and a centrifugal fan is installed at the end of the exhaust pipe 5.

[0043] This invention employs multiple sensors to acquire key data on the kitchen environment and the local environment within the range hood. The sensors mainly include the following types:

[0044] a. Oil fume concentration sensor: Monitors oil fume concentration to determine the oil fume status.

[0045] b. PT100 temperature sensor: monitors local ambient temperature, is stable at low temperatures, and is suitable for room temperature measurements such as indoor and outdoor temperatures.

[0046] b. Type K thermocouple: Used to monitor high-temperature temperatures, suitable for monitoring the temperature of cooking fumes in order to calculate their movement trend.

[0047] c. Humidity sensor: Monitors the humidity of cooking fumes in order to calculate their movement trend.

[0048] d. Wind speed sensor: monitors the flow velocity of oil fumes to determine the diffusion direction; monitors the initial velocity of the air curtain for parameter optimization input.

[0049] e. Negative pressure sensor: Monitors the negative pressure status in the kitchen and optimizes the air supply strategy.

[0050] f. CO2 sensor: Monitors the CO2 concentration inside the fume hood and in the indoor breathing zone.

[0051] g. Air quality sensor: monitors air pollutant concentration parameters such as formaldehyde, CO, PM2.5, PM10, TVOC, etc.

[0052] An air quality sensor is installed in front of the dynamic blowing and suction type fume extraction device; a wind speed sensor is arranged at the outlet of the strip-shaped air inlet 12 to monitor the initial velocity at the air curtain outlet; a temperature sensor and a fume concentration sensor are installed above the heating zone 9 to detect the generated fumes; the curved fume hood 3 is equipped with temperature and humidity sensors and a wind speed sensor, and multiple measuring points can be arranged to obtain the comprehensive environmental index of the area by averaging the values ​​of the measuring points, which can monitor the state of the fumes as they diffuse to the capture surface; a fume concentration sensor, a temperature sensor, a humidity sensor, and a CO2 concentration sensor are installed at the fume outlet, and the parameters of the mixed fume gas are detected after the fumes and air at the outlet are uniformly mixed. An air quality sensor and a PT100 temperature sensor are installed outdoors, as the air in the air curtain mainly comes from outdoors, so it is necessary to monitor the outdoor air parameters of temperature and humidity.

[0053] For the central control platform host computer 7 and controller 8, the central control platform host computer 7 collects data from the sensors and makes real-time dynamic adjustments based on the sensor data and preset algorithms to adapt to different working conditions. The controller 8 mainly includes a PLC and an STM32 microcontroller. The controller 8 receives output instructions from the host computer and then adjusts the dynamic parameters of the air curtain, such as the angle and initial velocity of the air curtain, as well as the exhaust and make-up air volume of the fan.

[0054] This utility model's blowing and suction type dynamic fume extraction system can be installed in various commercial kitchen environments, including restaurants, hotels, and large canteens in the catering industry. It has a compact structure, is easy to install, and is compatible with existing kitchen air conditioning and ventilation equipment.

[0055] In practical implementation, depending on the specific needs of the kitchen and the size of the smoke extraction area, different specifications and sizes of curved side-suction devices and air curtain systems can be selected. Meanwhile, the control unit can be controlled via a touch panel or wireless device, facilitating real-time adjustments by operators; alternatively, a centralized control management solution can be adopted. In large commercial buildings with multiple devices, a unified centralized control method can be used, offering better cost-effectiveness.

[0056] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0057] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0058] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0059] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0060] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

[0061] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined by reference to the above description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed utility model subject matter.

Claims

1. A dynamic blowing and suction type oil fume exhaust device, characterized in that, Includes an air curtain ventilation mechanism (1), an arc-shaped smoke exhaust hood (3), and a stove; A heating area (9) is provided on the top of the stove, and an arc-shaped exhaust hood (3) is provided behind the stove. The air curtain air supply mechanism (1) includes a blower (10), a flexible gradually expanding air supply duct (11), and a strip air outlet (12). The two ends of the flexible gradually expanding air supply duct (11) are connected to the blower (10) and the strip air outlet (12), respectively. The strip air outlet (12) is located in front of the stove and faces the arc-shaped exhaust hood (3).

2. The dynamic blowing and suction type oil fume exhaust device according to claim 1, characterized in that, The bottom end of the flexible gradually expanding air supply duct (11) is a circular port (13), which is connected to the circular air outlet of the blower (10). The size of the flexible gradually expanding air supply duct (11) gradually increases from the bottom end to the top end. The top end of the flexible gradually expanding air supply duct (11) is a long strip port (15), which is connected to the strip air outlet (12).

3. The dynamic blowing and suction type oil fume exhaust device according to claim 1, characterized in that, The height of the strip air vent (12) is higher than the height of the heating area (9).

4. The dynamic blowing and suction type oil fume exhaust device according to claim 1, characterized in that, The blower (10) is located outdoors.

5. The dynamic blowing and suction type oil fume exhaust device according to claim 1, characterized in that, An adjustable air vent device (2) is provided between the strip air vent (12) and the stove. The adjustable air vent device (2) includes a servo motor (16), a lead screw (17) and a rotating plate (18). The servo motor (16) is set on the stove and faces the strip air vent (12). The output end of the servo motor (16) is connected to the lead screw (17). A connecting plate is threaded on the lead screw (17). The end of the rotating plate (18) is connected to the front end of the strip air vent (12). The two sides of the strip air vent (12) are rotatably connected to the stove. The front end of the rotating plate (18) is provided with a long strip hole, which is slidably connected to the connecting plate.

6. The dynamic blowing and suction type oil fume exhaust device according to claim 1, characterized in that, A sliding plate (20) is provided on the strip air outlet (12). The sliding plate (20) includes a strip plate (21) and a sliding groove (22). The sliding groove (22) is located at both ends of the strip plate (21). The strip plate (21) covers the strip air outlet (12). The sliding groove (22) is slidably connected to the side of the strip air outlet (12).

7. The dynamic blowing and suction type oil fume exhaust device according to claim 1, characterized in that, The arc-shaped exhaust hood (3) includes an arc-shaped side-suction grille (24) and a side baffle (25), with the side baffle (25) set on both sides of the stove.

8. The dynamic blowing and suction type oil fume exhaust device according to claim 7, characterized in that, The top of the arc-shaped side-suction grille (24) is provided with a smoke outlet, which is connected to the smoke inlet of the tapered oil fume collector (23). The smoke outlet of the tapered oil fume collector (23) is connected to the oil exhaust pipe (5), and the oil exhaust pipe (5) is connected to the centrifugal fan (6).

9. The dynamic blowing and suction type oil fume exhaust device according to claim 8, characterized in that, The flexible gradually expanding air supply duct (11) is made of flexible canvas (14).

10. The dynamic blowing and suction type oil fume exhaust device according to claim 1, characterized in that, It also includes at least one sensor, which is selected from at least one of the following: oil fume concentration sensor, temperature sensor, humidity sensor, wind speed sensor, negative pressure sensor, CO2 sensor, and air quality sensor.

Images