Air detection module and oil fume extraction equipment

Abstract

This utility model belongs to the field of electrical technology, specifically disclosing an air detection module and a fume extraction device. The air detection module includes a detection housing and a detection sensor. The detection housing has a separated air inlet chamber and an air outlet chamber, both of which penetrate through the first end of the detection housing and form an air inlet port and an air outlet port, respectively. An air inlet opening is formed on one side of the air inlet chamber wall, and an air outlet opening is formed on one side of the air outlet chamber wall. The air inlet chamber has an air inlet transition cavity extending from the air inlet port to the bottom of the air inlet chamber, and the cross-sectional area of ​​the air inlet transition cavity gradually increases in the direction towards the air inlet port. The detection sensor is installed on one side of the detection housing, and the air inlet port is connected to the detection inlet of the detection sensor, while the air outlet port is connected to the detection outlet of the detection sensor. The fume extraction device includes a body and an air detection module, with the air detection module installed in the body. This utility model can improve the detection sensitivity and reliability of the air detection module.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to an air detection module and a fume extraction device. Background Technology

[0002] As people's demands for quality of life increase, range hoods that can extract kitchen fumes are being used more and more widely in homes to keep the kitchen clean and improve the user's cooking experience.

[0003] The prior art provides a range hood with a particulate matter concentration detection device installed on the side of the smoke collection hood to detect the concentration of inhalable particulate matter inside the kitchen. The particulate matter concentration detection device is installed on the smoke collection hood via a mounting bracket, which has an air inlet and an air outlet. The air inlet is connected to the detection inlet of the particulate matter concentration detection device, and the air outlet is connected to the detection outlet of the particulate matter concentration detection device. External airflow enters the particulate matter concentration detection device through the air inlet and the detection inlet to complete the detection, and then flows out through the detection inlet and the air outlet.

[0004] In existing range hoods, the detection inlet is connected to the air inlet on the mounting bracket, and the detection outlet is connected to the air outlet on the mounting bracket. During long-term operation of the range hood, the air inlet may become obstructed due to the accumulation of oil fumes, which can lead to a decrease in the sensitivity and reliability of the particulate matter detection device and is not conducive to the long-term stable operation of the range hood. Utility Model Content

[0005] The purpose of this invention is to provide an air detection module and a fume extraction device, which can effectively improve the sensitivity and reliability of the air detection module in detecting air quality, and improve the long-term performance of the air detection module and the fume extraction device.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] An air detection module, comprising:

[0008] The detection housing has a separate air inlet chamber and an air outlet chamber. Both the air inlet chamber and the air outlet chamber pass through the first end of the detection housing and form an air inlet port and an air outlet port, respectively. An air inlet opening is provided on one side of the cavity wall of the air inlet chamber, and an air outlet opening is provided on one side of the cavity wall of the air outlet chamber. The air inlet chamber has an air inlet transition cavity extending from the air inlet port to the bottom of the air inlet chamber. The cross-sectional area of ​​the air inlet transition cavity gradually increases in the direction toward the air inlet port.

[0009] The detection sensor is installed on one side of the detection housing, with the air inlet connected to the detection inlet of the detection sensor and the air outlet connected to the detection outlet of the detection sensor.

[0010] As an optional technical solution for an air detection module, the air intake transition cavity has a first cavity wall near the detection sensor and a second cavity wall directly opposite the first cavity wall, and the distance between the first cavity wall and the second cavity wall gradually decreases in the direction away from the air intake port;

[0011] And / or, the intake chamber includes an intake main chamber, which is connected to the side of the intake transition chamber away from the intake port, and the intake port is disposed on the cavity wall of the intake main chamber.

[0012] As an optional technical solution for air detection modules, the volume of the air inlet chamber is smaller than the volume of the air outlet chamber.

[0013] As an optional technical solution for air detection modules, the ventilation area of ​​the air inlet is smaller than that of the air outlet.

[0014] As an optional technical solution for an air detection module, the air outlet cavity has an air outlet transition cavity extending from the air outlet port to the bottom of the air outlet cavity, and the cross-sectional area of ​​the air outlet transition cavity gradually decreases in the direction away from the air outlet port.

[0015] As an optional technical solution for an air detection module, a mounting groove is formed by an inward recess on one side of the detection housing. Both the air inlet and the air outlet are located at the bottom of the mounting groove, and the detection sensor is installed in the mounting groove.

[0016] And / or, a first sealing gasket is sandwiched between the detection housing and the detection sensor. The first sealing gasket has a first through hole and a second through hole that are separated. The air inlet, the first through hole and the detection inlet are directly connected, and the air outlet, the second through hole and the detection outlet are directly connected.

[0017] As an optional technical solution for an air detection module, the air detection module also includes a mounting cover, which is located at the opening of the mounting slot and is detachably connected to the detection housing.

[0018] An oil fume extraction device includes a body, with an air inlet and an air outlet on one side. The oil fume extraction device also includes an air detection module as described above, which is installed inside the body. The air inlet is connected to the air intake port, and the air outlet is connected to the air outlet port.

[0019] As an optional technical solution for fume extraction equipment, the body includes a fume hood and a cover plate. The fume hood has an installation hole on the top or left and right sides. The detection housing is inserted into the installation hole, and the cover plate covers the installation hole and is detachably connected to the fume hood. The cover plate is provided with an air inlet and an air outlet.

[0020] As an optional technical solution for fume extraction equipment, the inner wall of the mounting hole is provided with a supporting edge protruding outward. The detection housing includes a housing body, which has an air inlet chamber and an air outlet chamber. The detection sensor is installed on one side of the housing body. The air inlet port and the air outlet port are both located at the first end of the housing body. The edge of the first end of the housing body is provided with a positioning flange protruding outward. The housing body is inserted into the mounting hole and the positioning flange abuts against the outer side of the supporting edge.

[0021] As an optional technical solution for fume extraction equipment, the two supporting sides are provided with insertion holes, and the opposite sides of the cover plate are provided with insertion plate parts protruding in the direction towards the inside of the machine body. The insertion plate parts are provided in correspondence with the insertion holes, and the insertion plate parts are inserted into the insertion holes.

[0022] And / or, a limiting structure is provided on the opposite sides of the mounting hole, and an elastic locking arm is provided on the opposite outer walls of the shell body. The first end of the elastic locking arm is connected to the shell body, and the second end of the elastic locking arm extends in the direction toward the positioning flange. The elastic locking arm can move closer in the direction toward the shell body under the squeezing action so that the elastic locking arm passes through the mounting hole and abuts against the limiting structure.

[0023] As an optional technical solution for fume extraction equipment, the fume extraction equipment includes a second sealing gasket, which is sandwiched between the supporting side and the positioning flange. The second sealing gasket has a separated air inlet and air outlet, and the air inlet hole, air inlet opening and air outlet port are connected in sequence. The air outlet hole, air outlet opening and air outlet port are connected in sequence.

[0024] As an optional technical solution for fume extraction equipment, a filter screen is provided on the back side of the cover plate, which covers the air inlet and air outlet.

[0025] The beneficial effects of this utility model are as follows:

[0026] The air detection module provided by this utility model, by setting up an air inlet chamber and an air outlet chamber, allows the air to be detected to first enter the air inlet chamber through the air inlet port, and then enter the detection inlet from the air inlet chamber. This extends the flow path of external air into the detection sensor, thereby reducing the probability of external dust, water vapor, or oil fumes entering the detection sensor, lowering the probability of internal blockage, and improving the long-term performance of the air detection module. By setting up an air inlet chamber with an air inlet transition chamber, and the cross-sectional area of ​​the air inlet transition chamber gradually increases along the direction towards the air inlet port, it can increase the air intake of the air inlet chamber while avoiding the problem of increased overall footprint of the air detection module due to the large size of the detection housing. This avoids the problem of detection data delay caused by insufficient air intake, improves the detection sensitivity and reliability of the detection sensor, and enhances the long-term performance of the air detection module.

[0027] The fume extraction device provided by this utility model, by adopting the above-mentioned air detection module, can improve the sensitivity and reliability of air quality detection and enhance the long-term performance of the fume extraction device. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the fume extraction device provided in this embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram showing the disassembled structure of the air detection module and its installation structure provided in this embodiment of the utility model;

[0030] Figure 3 yes Figure 2 A magnified view of a section at point I;

[0031] Figure 4 yes Figure 2 A magnified view of a section at point J;

[0032] Figure 5 This is a schematic diagram of the structure of the detection housing provided in an embodiment of the present invention;

[0033] Figure 6 This is an assembly schematic diagram of the air detection module and its installation structure provided in this embodiment of the utility model from one perspective.

[0034] Figure 7 This is an assembly schematic diagram of the air detection module and its installation structure provided in this embodiment of the present invention from another perspective;

[0035] Figure 8 yes Figure 7 A magnified view of the area at point K.

[0036] 10. Air detection module; 20. Smoke hood; 201. Mounting plate; 2011. Mounting hole; 202. Hole flange; 203. Support side; 2031. Insertion hole; 204. Limiting side; 30. Cover plate; 301. Main board; 3011. Air inlet; 3012. Air outlet; 302. Insertion plate; 303. Protrusion; 40. Filter screen; 50. Second sealing gasket; 501. Air inlet opening; 502. Air outlet opening; 60. Air box;

[0037] 1. Inspection housing; 11. Housing body; 111. Mounting groove; 12. Positioning flange; 121. Clearance opening; 13. Elastic locking arm; 131. First arm; 132. Second arm; 14. Air inlet chamber; 141. Air inlet transition chamber; 1411. First chamber wall; 142. Main air inlet chamber; 1421. Air inlet port; 15. Air outlet chamber; 151. Air outlet transition chamber; 1511. Inclined chamber wall; 152. Main air outlet chamber; 1521. Air outlet port; 16. Mounting post;

[0038] 2. Detection sensor; 21. Avoidance gap; 22. Positioning plate;

[0039] 3. Mounting cover; 31. Sealing plate; 32. Positioning protrusion; 33. Fastening through hole; 4. Connecting wire; 5. First sealing gasket; 51. First through hole; 52. Second through hole. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.

[0042] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] This embodiment provides an oil fume extraction device that can be applied in a kitchen environment to purify the kitchen environment and enhance the cooking experience.

[0045] like Figure 1 , Figure 2 and Figure 5As shown, the fume extraction equipment includes a main body, an exhaust fan, and a controller. The main body has a connected smoke inlet and a smoke collection chamber. The exhaust fan's inlet is connected to the smoke collection chamber, creating a negative pressure at the smoke inlet during operation. This negative pressure allows external fumes to enter the smoke collection chamber and be discharged by the exhaust fan. The controller is communicatively connected to the exhaust fan to control its operation.

[0046] The fume extraction equipment also includes an air detection module 10, which is used to detect the air quality in the kitchen environment. Specifically, the air detection module 10 can be used to detect the concentration of inhalable particulate matter. The air detection module 10 is installed in the main body and communicates with the controller so that the controller can control the operation of the fume extraction equipment based on the detection results of the air detection module 10.

[0047] Specifically, the air detection module 10 includes a detection housing 1 and a detection sensor 2. The detection housing 1 has a separated air inlet chamber 14 and an air outlet chamber 15, which are connected to the same side of the detection housing 1 to form an air inlet port and an air outlet port, respectively. An air inlet vent 1421 is formed on one side wall of the air inlet chamber 14, and an air outlet vent 1521 is formed on one side wall of the air outlet chamber 15. The air inlet chamber 14 has an air inlet transition cavity 141 extending from the air inlet port to the bottom of the air inlet chamber 14, and the cross-sectional area of ​​the air inlet transition cavity 141 gradually increases in the direction toward the air inlet port. The detection sensor 2 is installed on one side of the detection housing 1, with the air inlet vent 1421 communicating with the detection inlet of the detection sensor 2 and the air outlet vent 1521 communicating with the detection outlet of the detection sensor 2.

[0048] The detection housing 1 is installed inside the main body, and an air inlet 3011 and an air outlet 3012 are provided on one side of the main body. The air inlet 3011 is connected to the air inlet port, and the air outlet 3012 is connected to the air outlet port. Thus, external air enters the detection sensor 2 through the air inlet 3011, the air inlet chamber 14, the air inlet port 1421, and the detection inlet in sequence to be detected, and then flows out through the detection outlet, the air outlet port 1521, the air outlet chamber 15, and the air outlet 3012 in sequence, realizing the circulation of airflow and ensuring continuous detection.

[0049] The air detection module 10 provided in this embodiment, by setting an air inlet chamber 14 and an air outlet chamber 15, allows the air to be detected to first enter the air inlet chamber 14 through the air inlet port, and then enter the detection inlet from the air inlet chamber 14. This extends the flow path of external air into the detection sensor 2, thereby reducing the probability of external dust, water vapor, or oil fumes entering the detection sensor 2, reducing the probability of blockage inside the detection sensor 2, and improving the long-term performance of the air detection module 10. By setting an air inlet chamber 14 with an air inlet transition chamber 141, and the cross-sectional area of ​​the air inlet transition chamber 141 gradually increasing in the direction towards the air inlet port, the air intake volume of the air inlet chamber 14 can be increased while avoiding the problem of increased overall space occupied by the air detection module 10 due to the large size of the detection housing 1. This avoids the problem of data delay caused by insufficient air intake by the detection sensor 2, improves the detection sensitivity and reliability of the detection sensor 2, and improves the long-term performance of the air detection module 10.

[0050] The fume extraction device provided by this utility model, by adopting the above-mentioned air detection module 10, can improve the sensitivity and reliability of air quality detection and enhance the long-term performance of the fume extraction device.

[0051] In this embodiment, the detection sensor 2 can be a PM2.5 detection sensor or other sensors that require air circulation for air quality detection. The specific structure and detection principle of the detection sensor 2 can be set with reference to existing technology, and this utility model does not limit or elaborate on them.

[0052] To further improve detection sensitivity, the volume of the intake chamber 14 is smaller than that of the exhaust chamber 15. This avoids the problem of air stagnation or blockage in the intake chamber 14, which would delay the entry of air into the detection sensor 2. It improves the smoothness of intake and exhaust, thereby enhancing the smoothness of airflow circulation, reducing the data response hysteresis of the detection sensor 2, and improving the detection sensitivity of the detection sensor 2.

[0053] The ventilation area of ​​the intake port 1421 is smaller than that of the exhaust port 1521, which can improve the smoothness of exhaust and further avoid the problem of poor intake caused by exhaust blockage, thereby improving the detection reliability of the detection sensor 2.

[0054] For ease of description, the air inlet chamber 14 and the air outlet chamber 15 are arranged side by side in the first direction, and the detection sensor 2 is installed on one of the opposite sides of the detection housing 1 in the second direction. This reduces the size of the air detection module 10 in the first direction and facilitates the connection between the detection inlet and the air inlet 1421 and the detection outlet and the air outlet 1521. The first direction is perpendicular to the second direction.

[0055] The air intake transition cavity 141 has a first cavity wall 1411 and a second cavity wall that are opposite to and spaced apart in a second direction. The first cavity wall 1411 is close to the detection sensor 2, and the distance between the first cavity wall 1411 and the second cavity wall gradually increases in the direction toward the air intake port, so that the cross-sectional area of ​​the air intake transition cavity 141 gradually increases in the direction toward the air intake port. This arrangement helps to reduce the processing difficulty of the air intake cavity 14, thereby reducing the processing difficulty of the detection housing 1. The opposite side cavity walls of the air intake cavity 14 are parallel and spaced apart in the first direction, which helps to keep the opposite side walls of the detection housing 1 flat in the first direction and improves the ease of installation of the detection housing 1 on the machine body.

[0056] The intake chamber 14 also includes an intake main chamber 142, which is connected to the end of the intake transition chamber 141 away from the intake port. The cross-sectional area of ​​the intake main chamber 142 is equal to the minimum cross-sectional area of ​​the intake transition chamber 141, and an intake port 1421 is provided on the chamber wall of the intake main chamber 142. By setting the intake main chamber 142, the overall volume of the intake chamber 14 can be ensured to be sufficient, while avoiding the problem of excessive extension depth of the intake transition chamber 141 leading to a large intake port size requirement or an excessively small exhaust end size of the intake transition chamber 141.

[0057] The air outlet chamber 15 has an air outlet transition chamber 151 extending from the air outlet port to the bottom of the air outlet chamber 15. The cross-sectional area of ​​the air outlet transition chamber 151 gradually increases in the direction toward the air outlet port, thereby increasing the air outlet smoothness and improving the flow smoothness of the airflow through the detection sensor 2.

[0058] Furthermore, the exhaust transition cavity 151 includes an inclined cavity wall 1511 disposed near the detection sensor 2. The inclined cavity wall 1511 extends obliquely to the opposite cavity wall in a direction away from the exhaust port, so that the cross-sectional area of ​​the exhaust transition cavity 151 gradually decreases in the direction away from the exhaust port. The inclined cavity wall 1511 and the first cavity wall 1411 have the same inclination angle to facilitate the processing of the detection housing 1.

[0059] The air outlet chamber 15 also includes an air outlet main chamber 152, which is connected to the side of the air outlet transition chamber 151 away from the air outlet port. An air outlet 1521 is disposed on the cavity wall of the air outlet main chamber 152, and the air outlet main chamber 152 is arranged parallel to each other on opposite sides in the second direction. By setting the air outlet main chamber 152, it is possible to ensure that the overall volume of the air outlet chamber 15 is sufficient while avoiding the problem of the air outlet transition chamber 151 extending too deep, resulting in a large requirement for the air outlet port size or an excessively small air outlet end size.

[0060] In this embodiment, the width of the main exhaust chamber 152 in the second direction is greater than the width of the main intake chamber 142 in the second direction. This allows the volume of the main intake chamber 142 to be smaller than the volume of the main exhaust chamber 152, while maintaining the same size for the intake and exhaust ports. Consequently, the volume of the intake chamber 14 is smaller than the volume of the exhaust chamber 15, which facilitates the setting and installation of the detection housing 1.

[0061] In other embodiments, the width of the intake chamber 14 in the first direction may be smaller than the width of the exhaust chamber 15 in the first direction. In yet another embodiment, the depth of the intake chamber 14 in a third direction is smaller than the depth of the exhaust chamber 15 in a third direction, and the third direction is perpendicular to both the first and second directions.

[0062] To improve the ease of installation of the detection sensor 2, in this embodiment, a mounting groove 111 is formed by an inward recess on one side of the detection housing 1. The detection sensor 2 is installed in the mounting groove 111, and both the air inlet 1421 and the air outlet 1521 are located at the bottom of the mounting groove 111. This allows the detection sensor 2 to be positioned on the detection housing 1 via the mounting groove 111, improving the reliability and ease of installation. It also facilitates direct communication between the detection inlet and the air inlet 1421, and between the detection outlet and the air outlet 1521. Furthermore, this arrangement facilitates the machining of the first cavity wall 1411 and the inclined cavity wall 1511, thereby reducing the machining difficulty of the detection housing 1. Additionally, this arrangement improves the structural compactness of the air detection module 10. In other embodiments, the mounting groove 111 may not be provided, meaning the detection sensor 2 is located on the outside of the detection housing 1.

[0063] In this embodiment, one side wall of the detection housing 1 is punched inward to form an mounting groove 111, and at the same time, a first cavity wall 1411 and an inclined cavity wall 1511 are formed, thereby reducing the processing difficulty of the detection housing 1.

[0064] To improve the installation reliability of the detection sensor 2, the air detection module 10 also includes a mounting cover 3. The mounting cover 3 is placed over the opening of the mounting groove 111 and is detachably connected to the detection housing 1. The detection sensor 2 is sandwiched between the bottom of the mounting groove 111 and the mounting cover 3. By setting the mounting cover 3, the mounting cover 3 and the detection housing 1 can cooperate to form a mounting cavity. The detection sensor 2 is placed in the mounting cavity, which helps to protect the detection sensor 2 and also reduces the damage of oil fumes to the detection sensor 2, thereby improving the reliability and long-term performance of the detection sensor 2.

[0065] The mounting cover 3 includes a sealing plate portion 31 and a positioning protrusion 32 protruding from one side of the sealing plate portion 31. A positioning ring groove surrounding the mounting groove 111 is provided on the corresponding side of the detection housing 1. The positioning protrusion 32 is inserted into the positioning ring groove to realize the mounting cover 3 being installed and positioned on the detection housing 1.

[0066] In this embodiment, a mounting post 16 protrudes from the bottom of the mounting groove 111. The mounting post 16 has a fastening threaded hole, and at least two mounting posts 16 are spaced apart. The mounting cover 3 has fastening through holes 33, which correspond one-to-one with the mounting posts 16. The detection housing 1 and the mounting cover 3 are fastened together by fasteners passing through the fastening through holes 33 and the fastening threaded holes to ensure the stability of the detection sensor 2 during installation.

[0067] Furthermore, the housing of the detection sensor 2 is provided with a clearance notch 21 at the position corresponding to the mounting post 16. A positioning plate portion 22 is provided in the clearance notch 21. A through hole is provided on the positioning plate portion 22. The through hole is aligned with the fastening thread hole. The fastening threaded part passes through the through hole, thereby ensuring that the detection sensor 2 will not shake in the mounting groove 111 and improving the installation reliability of the detection sensor 2.

[0068] Preferably, mounting posts 16 are provided at two opposite corners of the mounting groove 111 to ensure the installation stability of the detection sensor 2 while facilitating the provision of clearance notches 21 and positioning plates on the housing of the detection sensor 2. In other embodiments, the housing of the detection sensor 2 may have a positioning plate portion 22 protruding outward, or the fastener may pass directly through the housing.

[0069] In this embodiment, the air detection module 10 further includes a first sealing gasket 5, which is sandwiched between the detection housing 1 and the housing of the detection sensor 2. The first sealing gasket 5 has a first through hole 51 communicating with the detection inlet and a second through hole 52 communicating with the detection outlet. That is, the air inlet 1421, the first through hole 51, and the detection inlet are sequentially communicating with each other, and the air outlet 1521, the second through hole 52, and the detection outlet are communicating with each other. By setting the first sealing gasket 5, the air inlet channel and the air outlet channel of the detection sensor 2 can be separated, thereby ensuring the reliability of the detection. Preferably, the size of the first through hole 51 matches the size of the air inlet 1421, and the size of the second through hole 52 matches the size of the air outlet 1521.

[0070] A wire-passing opening is provided on the side wall of the mounting slot 111. The connecting wire 4 of the detection sensor 2 is passed through the wire-passing opening to facilitate the connection between the connecting wire 4 and the controller. The wire-passing opening is open on the side facing the mounting cover 3, and the mounting cover 3 can seal the opening so that the connecting wire 4 can be clamped between the side wall of the wire-passing opening and the mounting cover 3.

[0071] like Figure 1, Figure 2 and Figure 6 As shown, to improve the ease of installation of the air detection module 10 on the body, the body includes a smoke hood 20 and a cover plate 30. The smoke hood 20 has a smoke collection chamber. The top, front or left and right sides of the smoke hood 20 are provided with mounting holes 2011. The detection housing 1 is inserted into the mounting holes 2011. The cover plate 30 is placed on the mounting holes 2011 and is detachably connected to the smoke hood 20. The cover plate 30 is provided with an air inlet 3011 and an air outlet 3012. By providing the cover plate 30 and the mounting hole 2011, the air detection module 10 can be inserted into the machine body through the mounting hole 2011, which facilitates the installation and removal of the air detection module 10, thereby facilitating the cleaning and replacement of the air detection module 10, and avoiding the problem of poor aesthetics caused by the air detection module 10 being located outside the machine body; by providing the cover plate 30, the air detection module 10 can be prevented from falling out of the machine body, and impurities can also be prevented from entering the air intake chamber 14 and causing blockage of the air intake chamber 14.

[0072] The cover plate 30 has multiple air inlets 3011 and multiple air outlets 3012. By providing multiple air inlets 3011 and air outlets 3012, the airflow rate can be increased while the size of a single air inlet 3011 and air outlet 3012 can be reduced.

[0073] In this embodiment, the unit also includes an air box 60 connected to the top of the fume hood 20, and an exhaust fan is installed inside the air box 60. In another embodiment, the exhaust fan can be installed inside the fume hood 20. In yet another embodiment, the fume extraction device can also be an integrated stove.

[0074] For ease of description, the plate with mounting holes 2011 in the smoke hood 20 is referred to as mounting plate 201. In this embodiment, the mounting holes 2011 are located on the top plate of the smoke hood 20, meaning that both the air inlet chamber 14 and the air outlet chamber 15 are open at their upper ends, and the top plate is the mounting plate 201. This arrangement helps improve the reliability of the detection. The mounting holes 2011 are preferably located in the middle of the smoke hood 20 in the left-right direction. In other embodiments, the mounting holes 2011 may also be located on the left or right sidewall of the smoke hood 20.

[0075] Furthermore, a support edge 203 is provided protruding from the inner wall of the mounting hole 2011. The detection housing 1 includes a housing body 11, which has the aforementioned air inlet chamber 14, air outlet chamber 15, and mounting groove 111. The air inlet port and air outlet port are located at the first end of the housing body 11. A positioning flange 12 is provided protruding outward from the first end of the housing body 11. The housing body 11 is inserted into the mounting hole 2011, and the positioning flange 12 abuts against the support edge 203 to limit the depth of the housing body 11 inserted into the mounting hole 2011, thereby enabling the detection housing 1 to be installed and positioned on the machine body and preventing the air detection module 10 from falling into the machine body.

[0076] Specifically, the edge of the mounting hole 2011 is folded to form a hole flange 202, which increases the depth of the mounting hole 2011. The edge of the hole flange 202 is folded inward to form a support edge 203. The cover plate 30 is located inside the mounting hole 2011 and preferably its outer surface is flush with the outer surface of the mounting plate 201.

[0077] like Figure 3 and Figure 8 As shown, the opposite side walls of the mounting hole 2011 are provided with limiting structures, and the opposite side walls of the housing body 11 are provided with protruding elastic locking arms 13. The first end of the elastic locking arm 13 is connected to the housing body 11, and the second end of the elastic locking arm 13 extends in the direction toward the positioning flange 12. The elastic locking arm 13 can move closer in the direction toward the housing body 11 under the action of compression, so that the elastic locking arm 13 passes through the mounting hole 2011 and abuts against the limiting structure. Specifically, the elastic locking arm 13 can be squeezed through the mounting hole 2011 when the housing body 11 is inserted into the mounting hole 2011, and is released after passing through the mounting hole 2011 to cooperate with the limiting structure. This can limit the detection housing 1 from being loosened out of the mounting hole 2011, improve the installation stability and reliability of the air detection module 10; at the same time, by setting the elastic locking arm 13 to cooperate with the positioning flange 12 to realize the installation limitation of the detection housing 1 on the body, the ease of disassembly and assembly of the air detection module 10 can be effectively improved. Specifically, when it is necessary to disassemble the air detection module 10, the elastic retaining arm 13 is squeezed relative to each other to deform the elastic retaining arm 13, so that the detection housing 1 can be removed from the mounting hole 2011.

[0078] In this embodiment, the inner edges of the two opposing support sides 203 extend into a limiting side 204 in the direction toward the interior of the machine body. The limiting side 204 abuts against the elastic locking arm 13, that is, the limiting side 204 is a limiting structure. This arrangement allows the second end of the elastic locking arm 13 and the positioning flange 12 to be spaced apart, which helps to provide space for the deformation of the elastic locking arm 13 and improves the ease of disassembly and assembly of the detection housing 1. In other embodiments, the elastic locking arm 13 may directly abut against the support side 203.

[0079] In this embodiment, the mounting hole 2011 has a rectangular structure, and each side of the mounting hole 2011 is provided with a supporting edge 203 to improve the installation stability and reliability of the detection housing 1 on the machine body. Elastic locking arms 13 are provided on opposite sides of the housing body 11 in the first direction.

[0080] The elastic locking arm 13 includes a first arm portion 131 and a second arm portion 132. One end of the first arm portion 131 is connected to the housing body 11, and the second end extends towards the positioning flange portion 12 and connects to the second arm portion 132. The first arm portion 131 extends from the first end to the second end in a direction away from the housing body 11. The end of the second arm portion 132 away from the first arm portion 131 extends towards the positioning flange portion 12, and the second arm portion 132 moves towards the housing body 11 in a direction away from the first arm portion 131. When the detection housing 1 is inserted into the mounting hole 2011, the second arm portion 132 abuts against the limiting edge portion 204. This structural design of the elastic locking arm 13 facilitates deformation of the elastic locking arm 13 after compression while increasing the contact stability and reliability between the elastic locking arm 13 and the limiting edge portion 204. In other embodiments, the elastic locking arm 13 may also include only the first arm portion 131.

[0081] like Figure 2 and Figure 6 As shown, to further prevent the air inlet chamber 14 and air outlet chamber 15 from being blocked, a filter screen 40 is provided on the back side of the cover plate 30. The filter screen 40 covers all the air inlets 3011 and air outlets 3012 to further prevent dust or small animals from entering the detection housing 1, thereby further improving the usability, installability, and reliability of the air detection module 10. Specifically, the filter screen 40 is disposed between the cover plate 30 and the support edge 203, and the filter screen 40 can be glued or connected to the inner side of the cover plate 30 by other detachable means.

[0082] In this embodiment, a second sealing gasket 50 is provided between the filter screen 40 and the support edge 203. The second sealing gasket 50 has a separated air inlet 501 and an air outlet 502. The air inlet 501 is directly connected to the air inlet port, and the air outlet 502 is directly connected to the air outlet port. This arrangement can better ensure the separation of the air inlet airflow and the air outlet airflow, thereby improving the detection reliability of the air detection module 10.

[0083] like Figure 3 , Figure 7 and Figure 8As shown, to improve the ease of installation of the cover plate 30, insert plate portions 302 are provided on opposite sides of the cover plate 30 along the direction towards the interior of the machine body. Insertion holes 2031 are provided on the supporting edges 203 on opposite sides. The insert plate portions 302 and insertion holes 2031 are arranged in a one-to-one correspondence, and the insert plate portions 302 are inserted into the corresponding insertion holes 2031 to achieve the installation and positioning of the cover plate 30 on the smoke hood 20. This installation structure is simple and easy to implement. Specifically, the cover plate 30 includes a main plate portion 301, on which air inlets 3011 and air outlets 3012 are provided. Insert plate portions 302 are provided on opposite sides of the main plate portion 301. Preferably, two or more insert plate portions 302 are provided at intervals along the extension direction of each side of the main plate portion 301 to further improve the installation stability and reliability of the cover plate 30.

[0084] Furthermore, the positioning flange 12 is provided with a clearance opening 121 at the position corresponding to the insertion hole 2031. The clearance opening 121 is provided one-to-one with the insertion plate 302 to avoid the insertion plate 302.

[0085] To improve the installation stability of the cover plate 30, a protrusion 303 is provided on the insertion plate portion 302. When the cover plate 30 is inserted into the insertion hole 2031, the protrusion 303 is located on the side of the support edge 203 facing the inside of the machine body, and the protrusion 303 prevents the insertion plate portion 302 from disengaging from the insertion hole 2031. The protrusion 303 is preferably a semi-circular protrusion to improve the convenience of the protrusion 303 passing through the insertion hole 2031 and entering the inside of the machine body.

[0086] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0087] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An air detection module, characterized in that, include: The detection housing (1) has a separate air inlet chamber (14) and an air outlet chamber (15). The air inlet chamber (14) and the air outlet chamber (15) both penetrate the first end of the detection housing (1) and form an air inlet port and an air outlet port, respectively. An air inlet port (1421) is provided on one side of the cavity wall of the air inlet chamber (14), and an air outlet port (1521) is provided on one side of the cavity wall of the air outlet chamber (15). The air inlet chamber (14) has an air inlet transition cavity (141) extending from the air inlet port to the bottom of the air inlet chamber (14). The cross-sectional area of ​​the air inlet transition cavity (141) gradually increases in the direction toward the air inlet port. The detection sensor (2) is installed on one side of the detection housing (1), and the air inlet (1421) is connected to the detection inlet of the detection sensor (2), and the air outlet (1521) is connected to the detection outlet of the detection sensor (2).

2. The air detection module according to claim 1, characterized in that, The air intake transition cavity (141) has a first cavity wall (1411) near the detection sensor (2) and a second cavity wall opposite to the first cavity wall (1411), and the distance between the first cavity wall (1411) and the second cavity wall gradually decreases in the direction away from the air intake port; And / or, the intake chamber (14) includes an intake main chamber (142), the intake main chamber (142) is connected to the side of the intake transition chamber (141) away from the intake port, and the intake port (1421) is disposed on the cavity wall of the intake main chamber (142).

3. The air detection module according to claim 1, characterized in that, The volume of the air inlet chamber (14) is smaller than the volume of the air outlet chamber (15).

4. The air detection module according to claim 3, characterized in that, The ventilation area of ​​the air inlet (1421) is smaller than that of the air outlet (1521).

5. The air detection module according to claim 1, characterized in that, The air outlet chamber (15) has an air outlet transition chamber (151) extending from the air outlet port to the bottom of the air outlet chamber (15), and the cross-sectional area of ​​the air outlet transition chamber (151) gradually decreases in the direction away from the air outlet port.

6. The air detection module according to any one of claims 1-4, characterized in that, The detection housing (1) has an inwardly recessed mounting groove (111) on one side. The air inlet (1421) and the air outlet (1521) are both located at the bottom of the mounting groove (111). The detection sensor (2) is installed in the mounting groove (111). And / or, a first sealing gasket (5) is sandwiched between the detection housing (1) and the detection sensor (2), the first sealing gasket (5) having a first through hole (51) and a second through hole (52) separated by a partition, the air inlet (1421), the first through hole (51) and the detection inlet being directly connected, and the air outlet (1521), the second through hole (52) and the detection outlet being directly connected.

7. The air detection module according to claim 6, characterized in that, The air detection module also includes a mounting cover (3), which covers the opening of the mounting groove (111) and is detachably connected to the detection housing (1).

8. A fume extraction device, comprising a body, wherein an air inlet (3011) and an air outlet (3012) are provided on one side of the body, characterized in that, The fume extraction device further includes an air detection module as described in any one of claims 1-7, wherein the air detection module is installed inside the body, and the air inlet (3011) is connected to the air inlet port, and the air outlet (3012) is connected to the air outlet port.

9. The fume extraction device according to claim 8, characterized in that, The body includes a smoke hood (20) and a cover plate (30). The smoke hood (20) has a mounting hole (2011) on its top, front or left and right sides. The detection housing (1) is inserted into the mounting hole (2011), and the cover plate (30) covers the mounting hole (2011) and is detachably connected to the smoke hood (20). The cover plate (30) is provided with an air inlet (3011) and an air outlet (3012).

10. The fume extraction device according to claim 9, characterized in that, The inner wall of the mounting hole (2011) is provided with a support side (203). The detection housing (1) includes a housing body (11). The housing body (11) has the air inlet chamber (14) and the air outlet chamber (15). The detection sensor (2) is installed on one side of the housing body (11). The air inlet port and the air outlet port are both located at the first end of the housing body (11). The first end edge of the housing body (11) is provided with a positioning flange (12) protruding outward. The housing body (11) is inserted into the mounting hole (2011) and the positioning flange (12) abuts against the outer side of the support side (203).

11. The fume extraction device according to claim 10, characterized in that, Two supporting edges (203) are provided with insertion holes (2031). The cover plate (30) has insertion plate portions (302) protruding from opposite sides in the direction toward the inside of the body. The insertion plate portions (302) are provided in correspondence with the insertion holes (2031) and the insertion plate portions (302) are inserted into the insertion holes (2031). And / or, a limiting structure is provided on the opposite sides of the mounting hole (2011), and an elastic locking arm (13) is provided on the opposite outer walls of the shell body (11). The first end of the elastic locking arm (13) is connected to the shell body (11), and the second end of the elastic locking arm (13) extends in the direction toward the positioning flange (12). The elastic locking arm (13) can move closer in the direction toward the shell body (11) under the squeezing action, so that the elastic locking arm (13) passes through the mounting hole (2011) and abuts against the limiting structure.

12. The fume extraction device according to claim 10, characterized in that, The fume extraction device includes a second sealing gasket (50), which is sandwiched between the support edge (203) and the positioning flange (12). The second sealing gasket (50) has a separated air inlet opening (501) and an air outlet opening (502). The air inlet hole (3011), the air inlet opening (501) and the air inlet port are connected in sequence, and the air outlet hole (3012), the air outlet opening (502) and the air outlet port are connected in sequence.

13. The fume extraction device according to any one of claims 9-12, characterized in that, A filter screen (40) is provided on the back side of the cover plate (30), and the filter screen (40) covers the air inlet (3011) and the air outlet (3012).

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